diff options
Diffstat (limited to 'net/devlink/leftover.c')
| -rw-r--r-- | net/devlink/leftover.c | 9532 |
1 files changed, 9532 insertions, 0 deletions
diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c new file mode 100644 index 000000000000..dffca2f9bfa7 --- /dev/null +++ b/net/devlink/leftover.c @@ -0,0 +1,9532 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * net/core/devlink.c - Network physical/parent device Netlink interface + * + * Heavily inspired by net/wireless/ + * Copyright (c) 2016 Mellanox Technologies. All rights reserved. + * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> + */ + +#include <linux/etherdevice.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/gfp.h> +#include <linux/device.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> +#include <linux/refcount.h> +#include <linux/workqueue.h> +#include <linux/u64_stats_sync.h> +#include <linux/timekeeping.h> +#include <rdma/ib_verbs.h> +#include <net/netlink.h> +#include <net/genetlink.h> +#include <net/rtnetlink.h> +#include <net/net_namespace.h> +#include <net/sock.h> +#include <net/devlink.h> +#define CREATE_TRACE_POINTS +#include <trace/events/devlink.h> + +#include "devl_internal.h" + +struct devlink_linecard { + struct list_head list; + struct devlink *devlink; + unsigned int index; + const struct devlink_linecard_ops *ops; + void *priv; + enum devlink_linecard_state state; + struct mutex state_lock; /* Protects state */ + const char *type; + struct devlink_linecard_type *types; + unsigned int types_count; + struct devlink *nested_devlink; +}; + +/** + * struct devlink_resource - devlink resource + * @name: name of the resource + * @id: id, per devlink instance + * @size: size of the resource + * @size_new: updated size of the resource, reload is needed + * @size_valid: valid in case the total size of the resource is valid + * including its children + * @parent: parent resource + * @size_params: size parameters + * @list: parent list + * @resource_list: list of child resources + * @occ_get: occupancy getter callback + * @occ_get_priv: occupancy getter callback priv + */ +struct devlink_resource { + const char *name; + u64 id; + u64 size; + u64 size_new; + bool size_valid; + struct devlink_resource *parent; + struct devlink_resource_size_params size_params; + struct list_head list; + struct list_head resource_list; + devlink_resource_occ_get_t *occ_get; + void *occ_get_priv; +}; + +static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = { + { + .name = "destination mac", + .id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC, + .bitwidth = 48, + }, +}; + +struct devlink_dpipe_header devlink_dpipe_header_ethernet = { + .name = "ethernet", + .id = DEVLINK_DPIPE_HEADER_ETHERNET, + .fields = devlink_dpipe_fields_ethernet, + .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet), + .global = true, +}; +EXPORT_SYMBOL_GPL(devlink_dpipe_header_ethernet); + +static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = { + { + .name = "destination ip", + .id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP, + .bitwidth = 32, + }, +}; + +struct devlink_dpipe_header devlink_dpipe_header_ipv4 = { + .name = "ipv4", + .id = DEVLINK_DPIPE_HEADER_IPV4, + .fields = devlink_dpipe_fields_ipv4, + .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4), + .global = true, +}; +EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv4); + +static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = { + { + .name = "destination ip", + .id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP, + .bitwidth = 128, + }, +}; + +struct devlink_dpipe_header devlink_dpipe_header_ipv6 = { + .name = "ipv6", + .id = DEVLINK_DPIPE_HEADER_IPV6, + .fields = devlink_dpipe_fields_ipv6, + .fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6), + .global = true, +}; +EXPORT_SYMBOL_GPL(devlink_dpipe_header_ipv6); + +EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg); +EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr); +EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report); + +#define DEVLINK_PORT_FN_CAPS_VALID_MASK \ + (_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1) + +static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = { + [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY }, + [DEVLINK_PORT_FN_ATTR_STATE] = + NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE, + DEVLINK_PORT_FN_STATE_ACTIVE), + [DEVLINK_PORT_FN_ATTR_CAPS] = + NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK), +}; + +#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \ + WARN_ON_ONCE(!(devlink_port)->registered) +#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \ + WARN_ON_ONCE((devlink_port)->registered) +#define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \ + WARN_ON_ONCE(!(devlink_port)->initialized) + +static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, + unsigned int port_index) +{ + return xa_load(&devlink->ports, port_index); +} + +struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, + struct nlattr **attrs) +{ + if (attrs[DEVLINK_ATTR_PORT_INDEX]) { + u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); + struct devlink_port *devlink_port; + + devlink_port = devlink_port_get_by_index(devlink, port_index); + if (!devlink_port) + return ERR_PTR(-ENODEV); + return devlink_port; + } + return ERR_PTR(-EINVAL); +} + +struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + return devlink_port_get_from_attrs(devlink, info->attrs); +} + +static inline bool +devlink_rate_is_leaf(struct devlink_rate *devlink_rate) +{ + return devlink_rate->type == DEVLINK_RATE_TYPE_LEAF; +} + +static inline bool +devlink_rate_is_node(struct devlink_rate *devlink_rate) +{ + return devlink_rate->type == DEVLINK_RATE_TYPE_NODE; +} + +static struct devlink_rate * +devlink_rate_leaf_get_from_info(struct devlink *devlink, struct genl_info *info) +{ + struct devlink_rate *devlink_rate; + struct devlink_port *devlink_port; + + devlink_port = devlink_port_get_from_attrs(devlink, info->attrs); + if (IS_ERR(devlink_port)) + return ERR_CAST(devlink_port); + devlink_rate = devlink_port->devlink_rate; + return devlink_rate ?: ERR_PTR(-ENODEV); +} + +static struct devlink_rate * +devlink_rate_node_get_by_name(struct devlink *devlink, const char *node_name) +{ + static struct devlink_rate *devlink_rate; + + list_for_each_entry(devlink_rate, &devlink->rate_list, list) { + if (devlink_rate_is_node(devlink_rate) && + !strcmp(node_name, devlink_rate->name)) + return devlink_rate; + } + return ERR_PTR(-ENODEV); +} + +static struct devlink_rate * +devlink_rate_node_get_from_attrs(struct devlink *devlink, struct nlattr **attrs) +{ + const char *rate_node_name; + size_t len; + + if (!attrs[DEVLINK_ATTR_RATE_NODE_NAME]) + return ERR_PTR(-EINVAL); + rate_node_name = nla_data(attrs[DEVLINK_ATTR_RATE_NODE_NAME]); + len = strlen(rate_node_name); + /* Name cannot be empty or decimal number */ + if (!len || strspn(rate_node_name, "0123456789") == len) + return ERR_PTR(-EINVAL); + + return devlink_rate_node_get_by_name(devlink, rate_node_name); +} + +struct devlink_rate * +devlink_rate_node_get_from_info(struct devlink *devlink, struct genl_info *info) +{ + return devlink_rate_node_get_from_attrs(devlink, info->attrs); +} + +struct devlink_rate * +devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info) +{ + struct nlattr **attrs = info->attrs; + + if (attrs[DEVLINK_ATTR_PORT_INDEX]) + return devlink_rate_leaf_get_from_info(devlink, info); + else if (attrs[DEVLINK_ATTR_RATE_NODE_NAME]) + return devlink_rate_node_get_from_info(devlink, info); + else + return ERR_PTR(-EINVAL); +} + +static struct devlink_linecard * +devlink_linecard_get_by_index(struct devlink *devlink, + unsigned int linecard_index) +{ + struct devlink_linecard *devlink_linecard; + + list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) { + if (devlink_linecard->index == linecard_index) + return devlink_linecard; + } + return NULL; +} + +static bool devlink_linecard_index_exists(struct devlink *devlink, + unsigned int linecard_index) +{ + return devlink_linecard_get_by_index(devlink, linecard_index); +} + +static struct devlink_linecard * +devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs) +{ + if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) { + u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]); + struct devlink_linecard *linecard; + + linecard = devlink_linecard_get_by_index(devlink, linecard_index); + if (!linecard) + return ERR_PTR(-ENODEV); + return linecard; + } + return ERR_PTR(-EINVAL); +} + +struct devlink_linecard * +devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info) +{ + return devlink_linecard_get_from_attrs(devlink, info->attrs); +} + +struct devlink_sb { + struct list_head list; + unsigned int index; + u32 size; + u16 ingress_pools_count; + u16 egress_pools_count; + u16 ingress_tc_count; + u16 egress_tc_count; +}; + +static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb) +{ + return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count; +} + +static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink, + unsigned int sb_index) +{ + struct devlink_sb *devlink_sb; + + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + if (devlink_sb->index == sb_index) + return devlink_sb; + } + return NULL; +} + +static bool devlink_sb_index_exists(struct devlink *devlink, + unsigned int sb_index) +{ + return devlink_sb_get_by_index(devlink, sb_index); +} + +static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink, + struct nlattr **attrs) +{ + if (attrs[DEVLINK_ATTR_SB_INDEX]) { + u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]); + struct devlink_sb *devlink_sb; + + devlink_sb = devlink_sb_get_by_index(devlink, sb_index); + if (!devlink_sb) + return ERR_PTR(-ENODEV); + return devlink_sb; + } + return ERR_PTR(-EINVAL); +} + +static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + return devlink_sb_get_from_attrs(devlink, info->attrs); +} + +static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb, + struct nlattr **attrs, + u16 *p_pool_index) +{ + u16 val; + + if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX]) + return -EINVAL; + + val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]); + if (val >= devlink_sb_pool_count(devlink_sb)) + return -EINVAL; + *p_pool_index = val; + return 0; +} + +static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb, + struct genl_info *info, + u16 *p_pool_index) +{ + return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs, + p_pool_index); +} + +static int +devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs, + enum devlink_sb_pool_type *p_pool_type) +{ + u8 val; + + if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE]) + return -EINVAL; + + val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]); + if (val != DEVLINK_SB_POOL_TYPE_INGRESS && + val != DEVLINK_SB_POOL_TYPE_EGRESS) + return -EINVAL; + *p_pool_type = val; + return 0; +} + +static int +devlink_sb_pool_type_get_from_info(struct genl_info *info, + enum devlink_sb_pool_type *p_pool_type) +{ + return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type); +} + +static int +devlink_sb_th_type_get_from_attrs(struct nlattr **attrs, + enum devlink_sb_threshold_type *p_th_type) +{ + u8 val; + + if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]) + return -EINVAL; + + val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]); + if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC && + val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC) + return -EINVAL; + *p_th_type = val; + return 0; +} + +static int +devlink_sb_th_type_get_from_info(struct genl_info *info, + enum devlink_sb_threshold_type *p_th_type) +{ + return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type); +} + +static int +devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb, + struct nlattr **attrs, + enum devlink_sb_pool_type pool_type, + u16 *p_tc_index) +{ + u16 val; + + if (!attrs[DEVLINK_ATTR_SB_TC_INDEX]) + return -EINVAL; + + val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]); + if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS && + val >= devlink_sb->ingress_tc_count) + return -EINVAL; + if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS && + val >= devlink_sb->egress_tc_count) + return -EINVAL; + *p_tc_index = val; + return 0; +} + +static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps, + u32 cap, bool is_enable) +{ + caps->selector |= cap; + if (is_enable) + caps->value |= cap; +} + +static int devlink_port_fn_roce_fill(const struct devlink_ops *ops, + struct devlink_port *devlink_port, + struct nla_bitfield32 *caps, + struct netlink_ext_ack *extack) +{ + bool is_enable; + int err; + + if (!ops->port_fn_roce_get) + return 0; + + err = ops->port_fn_roce_get(devlink_port, &is_enable, extack); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + + devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable); + return 0; +} + +static int devlink_port_fn_migratable_fill(const struct devlink_ops *ops, + struct devlink_port *devlink_port, + struct nla_bitfield32 *caps, + struct netlink_ext_ack *extack) +{ + bool is_enable; + int err; + + if (!ops->port_fn_migratable_get || + devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) + return 0; + + err = ops->port_fn_migratable_get(devlink_port, &is_enable, extack); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + + devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable); + return 0; +} + +static int devlink_port_fn_caps_fill(const struct devlink_ops *ops, + struct devlink_port *devlink_port, + struct sk_buff *msg, + struct netlink_ext_ack *extack, + bool *msg_updated) +{ + struct nla_bitfield32 caps = {}; + int err; + + err = devlink_port_fn_roce_fill(ops, devlink_port, &caps, extack); + if (err) + return err; + + err = devlink_port_fn_migratable_fill(ops, devlink_port, &caps, extack); + if (err) + return err; + + if (!caps.selector) + return 0; + err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value, + caps.selector); + if (err) + return err; + + *msg_updated = true; + return 0; +} + +static int +devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb, + struct genl_info *info, + enum devlink_sb_pool_type pool_type, + u16 *p_tc_index) +{ + return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs, + pool_type, p_tc_index); +} + +struct devlink_region { + struct devlink *devlink; + struct devlink_port *port; + struct list_head list; + union { + const struct devlink_region_ops *ops; + const struct devlink_port_region_ops *port_ops; + }; + struct mutex snapshot_lock; /* protects snapshot_list, + * max_snapshots and cur_snapshots + * consistency. + */ + struct list_head snapshot_list; + u32 max_snapshots; + u32 cur_snapshots; + u64 size; +}; + +struct devlink_snapshot { + struct list_head list; + struct devlink_region *region; + u8 *data; + u32 id; +}; + +static struct devlink_region * +devlink_region_get_by_name(struct devlink *devlink, const char *region_name) +{ + struct devlink_region *region; + + list_for_each_entry(region, &devlink->region_list, list) + if (!strcmp(region->ops->name, region_name)) + return region; + + return NULL; +} + +static struct devlink_region * +devlink_port_region_get_by_name(struct devlink_port *port, + const char *region_name) +{ + struct devlink_region *region; + + list_for_each_entry(region, &port->region_list, list) + if (!strcmp(region->ops->name, region_name)) + return region; + + return NULL; +} + +static struct devlink_snapshot * +devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id) +{ + struct devlink_snapshot *snapshot; + + list_for_each_entry(snapshot, ®ion->snapshot_list, list) + if (snapshot->id == id) + return snapshot; + + return NULL; +} + +static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct devlink *devlink) +{ + struct nlattr *nested_attr; + + nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK); + if (!nested_attr) + return -EMSGSIZE; + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + nla_nest_end(msg, nested_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, nested_attr); + return -EMSGSIZE; +} + +int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port) +{ + if (devlink_nl_put_handle(msg, devlink_port->devlink)) + return -EMSGSIZE; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) + return -EMSGSIZE; + return 0; +} + +size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port) +{ + struct devlink *devlink = devlink_port->devlink; + + return nla_total_size(strlen(devlink->dev->bus->name) + 1) /* DEVLINK_ATTR_BUS_NAME */ + + nla_total_size(strlen(dev_name(devlink->dev)) + 1) /* DEVLINK_ATTR_DEV_NAME */ + + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */ +} + +static int devlink_nl_port_attrs_put(struct sk_buff *msg, + struct devlink_port *devlink_port) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + + if (!devlink_port->attrs_set) + return 0; + if (attrs->lanes) { + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes)) + return -EMSGSIZE; + } + if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable)) + return -EMSGSIZE; + if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour)) + return -EMSGSIZE; + switch (devlink_port->attrs.flavour) { + case DEVLINK_PORT_FLAVOUR_PCI_PF: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, + attrs->pci_pf.controller) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf)) + return -EMSGSIZE; + if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external)) + return -EMSGSIZE; + break; + case DEVLINK_PORT_FLAVOUR_PCI_VF: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, + attrs->pci_vf.controller) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf)) + return -EMSGSIZE; + if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external)) + return -EMSGSIZE; + break; + case DEVLINK_PORT_FLAVOUR_PCI_SF: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, + attrs->pci_sf.controller) || + nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, + attrs->pci_sf.pf) || + nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER, + attrs->pci_sf.sf)) + return -EMSGSIZE; + break; + case DEVLINK_PORT_FLAVOUR_PHYSICAL: + case DEVLINK_PORT_FLAVOUR_CPU: + case DEVLINK_PORT_FLAVOUR_DSA: + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, + attrs->phys.port_number)) + return -EMSGSIZE; + if (!attrs->split) + return 0; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, + attrs->phys.port_number)) + return -EMSGSIZE; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER, + attrs->phys.split_subport_number)) + return -EMSGSIZE; + break; + default: + break; + } + return 0; +} + +static int devlink_port_fn_hw_addr_fill(const struct devlink_ops *ops, + struct devlink_port *port, + struct sk_buff *msg, + struct netlink_ext_ack *extack, + bool *msg_updated) +{ + u8 hw_addr[MAX_ADDR_LEN]; + int hw_addr_len; + int err; + + if (!ops->port_function_hw_addr_get) + return 0; + + err = ops->port_function_hw_addr_get(port, hw_addr, &hw_addr_len, + extack); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); + if (err) + return err; + *msg_updated = true; + return 0; +} + +static int devlink_nl_rate_fill(struct sk_buff *msg, + struct devlink_rate *devlink_rate, + enum devlink_command cmd, u32 portid, u32 seq, + int flags, struct netlink_ext_ack *extack) +{ + struct devlink *devlink = devlink_rate->devlink; + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + if (nla_put_u16(msg, DEVLINK_ATTR_RATE_TYPE, devlink_rate->type)) + goto nla_put_failure; + + if (devlink_rate_is_leaf(devlink_rate)) { + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + devlink_rate->devlink_port->index)) + goto nla_put_failure; + } else if (devlink_rate_is_node(devlink_rate)) { + if (nla_put_string(msg, DEVLINK_ATTR_RATE_NODE_NAME, + devlink_rate->name)) + goto nla_put_failure; + } + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_RATE_TX_SHARE, + devlink_rate->tx_share, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_RATE_TX_MAX, + devlink_rate->tx_max, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u32(msg, DEVLINK_ATTR_RATE_TX_PRIORITY, + devlink_rate->tx_priority)) + goto nla_put_failure; + + if (nla_put_u32(msg, DEVLINK_ATTR_RATE_TX_WEIGHT, + devlink_rate->tx_weight)) + goto nla_put_failure; + + if (devlink_rate->parent) + if (nla_put_string(msg, DEVLINK_ATTR_RATE_PARENT_NODE_NAME, + devlink_rate->parent->name)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static bool +devlink_port_fn_state_valid(enum devlink_port_fn_state state) +{ + return state == DEVLINK_PORT_FN_STATE_INACTIVE || + state == DEVLINK_PORT_FN_STATE_ACTIVE; +} + +static bool +devlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate) +{ + return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED || + opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED; +} + +static int devlink_port_fn_state_fill(const struct devlink_ops *ops, + struct devlink_port *port, + struct sk_buff *msg, + struct netlink_ext_ack *extack, + bool *msg_updated) +{ + enum devlink_port_fn_opstate opstate; + enum devlink_port_fn_state state; + int err; + + if (!ops->port_fn_state_get) + return 0; + + err = ops->port_fn_state_get(port, &state, &opstate, extack); + if (err) { + if (err == -EOPNOTSUPP) + return 0; + return err; + } + if (!devlink_port_fn_state_valid(state)) { + WARN_ON_ONCE(1); + NL_SET_ERR_MSG(extack, "Invalid state read from driver"); + return -EINVAL; + } + if (!devlink_port_fn_opstate_valid(opstate)) { + WARN_ON_ONCE(1); + NL_SET_ERR_MSG(extack, "Invalid operational state read from driver"); + return -EINVAL; + } + if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) || + nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate)) + return -EMSGSIZE; + *msg_updated = true; + return 0; +} + +static int +devlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable, + struct netlink_ext_ack *extack) +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + + return ops->port_fn_migratable_set(devlink_port, enable, extack); +} + +static int +devlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable, + struct netlink_ext_ack *extack) +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + + return ops->port_fn_roce_set(devlink_port, enable, extack); +} + +static int devlink_port_fn_caps_set(struct devlink_port *devlink_port, + const struct nlattr *attr, + struct netlink_ext_ack *extack) +{ + struct nla_bitfield32 caps; + u32 caps_value; + int err; + + caps = nla_get_bitfield32(attr); + caps_value = caps.value & caps.selector; + if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) { + err = devlink_port_fn_roce_set(devlink_port, + caps_value & DEVLINK_PORT_FN_CAP_ROCE, + extack); + if (err) + return err; + } + if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { + err = devlink_port_fn_mig_set(devlink_port, caps_value & + DEVLINK_PORT_FN_CAP_MIGRATABLE, + extack); + if (err) + return err; + } + return 0; +} + +static int +devlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, + struct netlink_ext_ack *extack) +{ + const struct devlink_ops *ops; + struct nlattr *function_attr; + bool msg_updated = false; + int err; + + function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); + if (!function_attr) + return -EMSGSIZE; + + ops = port->devlink->ops; + err = devlink_port_fn_hw_addr_fill(ops, port, msg, extack, + &msg_updated); + if (err) + goto out; + err = devlink_port_fn_caps_fill(ops, port, msg, extack, + &msg_updated); + if (err) + goto out; + err = devlink_port_fn_state_fill(ops, port, msg, extack, &msg_updated); +out: + if (err || !msg_updated) + nla_nest_cancel(msg, function_attr); + else + nla_nest_end(msg, function_attr); + return err; +} + +static int devlink_nl_port_fill(struct sk_buff *msg, + struct devlink_port *devlink_port, + enum devlink_command cmd, u32 portid, u32 seq, + int flags, struct netlink_ext_ack *extack) +{ + struct devlink *devlink = devlink_port->devlink; + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; + + spin_lock_bh(&devlink_port->type_lock); + if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) + goto nla_put_failure_type_locked; + if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && + nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, + devlink_port->desired_type)) + goto nla_put_failure_type_locked; + if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { + if (devlink_port->type_eth.netdev && + (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, + devlink_port->type_eth.ifindex) || + nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, + devlink_port->type_eth.ifname))) + goto nla_put_failure_type_locked; + } + if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { + struct ib_device *ibdev = devlink_port->type_ib.ibdev; + + if (ibdev && + nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, + ibdev->name)) + goto nla_put_failure_type_locked; + } + spin_unlock_bh(&devlink_port->type_lock); + if (devlink_nl_port_attrs_put(msg, devlink_port)) + goto nla_put_failure; + if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) + goto nla_put_failure; + if (devlink_port->linecard && + nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, + devlink_port->linecard->index)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure_type_locked: + spin_unlock_bh(&devlink_port->type_lock); +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_port_notify(struct devlink_port *devlink_port, + enum devlink_command cmd) +{ + struct devlink *devlink = devlink_port->devlink; + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL); + + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static void devlink_rate_notify(struct devlink_rate *devlink_rate, + enum devlink_command cmd) +{ + struct devlink *devlink = devlink_rate->devlink; + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL); + + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_rate_fill(msg, devlink_rate, cmd, 0, 0, 0, NULL); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int +devlink_nl_cmd_rate_get_dump_one(struct sk_buff *msg, struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_rate *devlink_rate; + int idx = 0; + int err = 0; + + list_for_each_entry(devlink_rate, &devlink->rate_list, list) { + enum devlink_command cmd = DEVLINK_CMD_RATE_NEW; + u32 id = NETLINK_CB(cb->skb).portid; + + if (idx < state->idx) { + idx++; + continue; + } + err = devlink_nl_rate_fill(msg, devlink_rate, cmd, id, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, NULL); + if (err) { + state->idx = idx; + break; + } + idx++; + } + + return err; +} + +const struct devlink_cmd devl_cmd_rate_get = { + .dump_one = devlink_nl_cmd_rate_get_dump_one, +}; + +static int devlink_nl_cmd_rate_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_rate *devlink_rate = info->user_ptr[1]; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_rate_fill(msg, devlink_rate, DEVLINK_CMD_RATE_NEW, + info->snd_portid, info->snd_seq, 0, + info->extack); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static bool +devlink_rate_is_parent_node(struct devlink_rate *devlink_rate, + struct devlink_rate *parent) +{ + while (parent) { + if (parent == devlink_rate) + return true; + parent = parent->parent; + } + return false; +} + +static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, + info->snd_portid, info->snd_seq, 0, + info->extack); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int +devlink_nl_cmd_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_port *devlink_port; + unsigned long port_index; + int err = 0; + + xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) { + err = devlink_nl_port_fill(msg, devlink_port, + DEVLINK_CMD_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, cb->extack); + if (err) { + state->idx = port_index; + break; + } + } + + return err; +} + +const struct devlink_cmd devl_cmd_port_get = { + .dump_one = devlink_nl_cmd_port_get_dump_one, +}; + +static int devlink_port_type_set(struct devlink_port *devlink_port, + enum devlink_port_type port_type) + +{ + int err; + + if (!devlink_port->devlink->ops->port_type_set) + return -EOPNOTSUPP; + + if (port_type == devlink_port->type) + return 0; + + err = devlink_port->devlink->ops->port_type_set(devlink_port, + port_type); + if (err) + return err; + + devlink_port->desired_type = port_type; + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); + return 0; +} + +static int devlink_port_function_hw_addr_set(struct devlink_port *port, + const struct nlattr *attr, + struct netlink_ext_ack *extack) +{ + const struct devlink_ops *ops = port->devlink->ops; + const u8 *hw_addr; + int hw_addr_len; + + hw_addr = nla_data(attr); + hw_addr_len = nla_len(attr); + if (hw_addr_len > MAX_ADDR_LEN) { + NL_SET_ERR_MSG(extack, "Port function hardware address too long"); + return -EINVAL; + } + if (port->type == DEVLINK_PORT_TYPE_ETH) { + if (hw_addr_len != ETH_ALEN) { + NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device"); + return -EINVAL; + } + if (!is_unicast_ether_addr(hw_addr)) { + NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported"); + return -EINVAL; + } + } + + return ops->port_function_hw_addr_set(port, hw_addr, hw_addr_len, + extack); +} + +static int devlink_port_fn_state_set(struct devlink_port *port, + const struct nlattr *attr, + struct netlink_ext_ack *extack) +{ + enum devlink_port_fn_state state; + const struct devlink_ops *ops; + + state = nla_get_u8(attr); + ops = port->devlink->ops; + return ops->port_fn_state_set(port, state, extack); +} + +static int devlink_port_function_validate(struct devlink_port *devlink_port, + struct nlattr **tb, + struct netlink_ext_ack *extack) +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + struct nlattr *attr; + + if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] && + !ops->port_function_hw_addr_set) { + NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], + "Port doesn't support function attributes"); + return -EOPNOTSUPP; + } + if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) { + NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], + "Function does not support state setting"); + return -EOPNOTSUPP; + } + attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; + if (attr) { + struct nla_bitfield32 caps; + + caps = nla_get_bitfield32(attr); + if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE && + !ops->port_fn_roce_set) { + NL_SET_ERR_MSG_ATTR(extack, attr, + "Port doesn't support RoCE function attribute"); + return -EOPNOTSUPP; + } + if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { + if (!ops->port_fn_migratable_set) { + NL_SET_ERR_MSG_ATTR(extack, attr, + "Port doesn't support migratable function attribute"); + return -EOPNOTSUPP; + } + if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { + NL_SET_ERR_MSG_ATTR(extack, attr, + "migratable function attribute supported for VFs only"); + return -EOPNOTSUPP; + } + } + } + return 0; +} + +static int devlink_port_function_set(struct devlink_port *port, + const struct nlattr *attr, + struct netlink_ext_ack *extack) +{ + struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1]; + int err; + + err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr, + devlink_function_nl_policy, extack); + if (err < 0) { + NL_SET_ERR_MSG(extack, "Fail to parse port function attributes"); + return err; + } + + err = devlink_port_function_validate(port, tb, extack); + if (err) + return err; + + attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; + if (attr) { + err = devlink_port_function_hw_addr_set(port, attr, extack); + if (err) + return err; + } + + attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; + if (attr) { + err = devlink_port_fn_caps_set(port, attr, extack); + if (err) + return err; + } + + /* Keep this as the last function attribute set, so that when + * multiple port function attributes are set along with state, + * Those can be applied first before activating the state. + */ + attr = tb[DEVLINK_PORT_FN_ATTR_STATE]; + if (attr) + err = devlink_port_fn_state_set(port, attr, extack); + + if (!err) + devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); + return err; +} + +static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + int err; + + if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { + enum devlink_port_type port_type; + + port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); + err = devlink_port_type_set(devlink_port, port_type); + if (err) + return err; + } + + if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) { + struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION]; + struct netlink_ext_ack *extack = info->extack; + + err = devlink_port_function_set(devlink_port, attr, extack); + if (err) + return err; + } + + return 0; +} + +static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = info->user_ptr[0]; + u32 count; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT)) + return -EINVAL; + if (!devlink->ops->port_split) + return -EOPNOTSUPP; + + count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]); + + if (!devlink_port->attrs.splittable) { + /* Split ports cannot be split. */ + if (devlink_port->attrs.split) + NL_SET_ERR_MSG(info->extack, "Port cannot be split further"); + else + NL_SET_ERR_MSG(info->extack, "Port cannot be split"); + return -EINVAL; + } + + if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { + NL_SET_ERR_MSG(info->extack, "Invalid split count"); + return -EINVAL; + } + + return devlink->ops->port_split(devlink, devlink_port, count, + info->extack); +} + +static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = info->user_ptr[0]; + + if (!devlink->ops->port_unsplit) + return -EOPNOTSUPP; + return devlink->ops->port_unsplit(devlink, devlink_port, info->extack); +} + +static int devlink_port_new_notify(struct devlink *devlink, + unsigned int port_index, + struct genl_info *info) +{ + struct devlink_port *devlink_port; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + lockdep_assert_held(&devlink->lock); + devlink_port = devlink_port_get_by_index(devlink, port_index); + if (!devlink_port) { + err = -ENODEV; + goto out; + } + + err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_NEW, + info->snd_portid, info->snd_seq, 0, NULL); + if (err) + goto out; + + return genlmsg_reply(msg, info); + +out: + nlmsg_free(msg); + return err; +} + +static int devlink_nl_cmd_port_new_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct devlink_port_new_attrs new_attrs = {}; + struct devlink *devlink = info->user_ptr[0]; + unsigned int new_port_index; + int err; + + if (!devlink->ops->port_new || !devlink->ops->port_del) + return -EOPNOTSUPP; + + if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] || + !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) { + NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified"); + return -EINVAL; + } + new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]); + new_attrs.pfnum = + nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]); + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + /* Port index of the new port being created by driver. */ + new_attrs.port_index = + nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + new_attrs.port_index_valid = true; + } + if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) { + new_attrs.controller = + nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]); + new_attrs.controller_valid = true; + } + if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF && + info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) { + new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]); + new_attrs.sfnum_valid = true; + } + + err = devlink->ops->port_new(devlink, &new_attrs, extack, + &new_port_index); + if (err) + return err; + + err = devlink_port_new_notify(devlink, new_port_index, info); + if (err && err != -ENODEV) { + /* Fail to send the response; destroy newly created port. */ + devlink->ops->port_del(devlink, new_port_index, extack); + } + return err; +} + +static int devlink_nl_cmd_port_del_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + unsigned int port_index; + + if (!devlink->ops->port_del) + return -EOPNOTSUPP; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_INDEX)) { + NL_SET_ERR_MSG(extack, "Port index is not specified"); + return -EINVAL; + } + port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + return devlink->ops->port_del(devlink, port_index, extack); +} + +static int +devlink_nl_rate_parent_node_set(struct devlink_rate *devlink_rate, + struct genl_info *info, + struct nlattr *nla_parent) +{ + struct devlink *devlink = devlink_rate->devlink; + const char *parent_name = nla_data(nla_parent); + const struct devlink_ops *ops = devlink->ops; + size_t len = strlen(parent_name); + struct devlink_rate *parent; + int err = -EOPNOTSUPP; + + parent = devlink_rate->parent; + + if (parent && !len) { + if (devlink_rate_is_leaf(devlink_rate)) + err = ops->rate_leaf_parent_set(devlink_rate, NULL, + devlink_rate->priv, NULL, + info->extack); + else if (devlink_rate_is_node(devlink_rate)) + err = ops->rate_node_parent_set(devlink_rate, NULL, + devlink_rate->priv, NULL, + info->extack); + if (err) + return err; + + refcount_dec(&parent->refcnt); + devlink_rate->parent = NULL; + } else if (len) { + parent = devlink_rate_node_get_by_name(devlink, parent_name); + if (IS_ERR(parent)) + return -ENODEV; + + if (parent == devlink_rate) { + NL_SET_ERR_MSG(info->extack, "Parent to self is not allowed"); + return -EINVAL; + } + + if (devlink_rate_is_node(devlink_rate) && + devlink_rate_is_parent_node(devlink_rate, parent->parent)) { + NL_SET_ERR_MSG(info->extack, "Node is already a parent of parent node."); + return -EEXIST; + } + + if (devlink_rate_is_leaf(devlink_rate)) + err = ops->rate_leaf_parent_set(devlink_rate, parent, + devlink_rate->priv, parent->priv, + info->extack); + else if (devlink_rate_is_node(devlink_rate)) + err = ops->rate_node_parent_set(devlink_rate, parent, + devlink_rate->priv, parent->priv, + info->extack); + if (err) + return err; + + if (devlink_rate->parent) + /* we're reassigning to other parent in this case */ + refcount_dec(&devlink_rate->parent->refcnt); + + refcount_inc(&parent->refcnt); + devlink_rate->parent = parent; + } + + return 0; +} + +static int devlink_nl_rate_set(struct devlink_rate *devlink_rate, + const struct devlink_ops *ops, + struct genl_info *info) +{ + struct nlattr *nla_parent, **attrs = info->attrs; + int err = -EOPNOTSUPP; + u32 priority; + u32 weight; + u64 rate; + + if (attrs[DEVLINK_ATTR_RATE_TX_SHARE]) { + rate = nla_get_u64(attrs[DEVLINK_ATTR_RATE_TX_SHARE]); + if (devlink_rate_is_leaf(devlink_rate)) + err = ops->rate_leaf_tx_share_set(devlink_rate, devlink_rate->priv, + rate, info->extack); + else if (devlink_rate_is_node(devlink_rate)) + err = ops->rate_node_tx_share_set(devlink_rate, devlink_rate->priv, + rate, info->extack); + if (err) + return err; + devlink_rate->tx_share = rate; + } + + if (attrs[DEVLINK_ATTR_RATE_TX_MAX]) { + rate = nla_get_u64(attrs[DEVLINK_ATTR_RATE_TX_MAX]); + if (devlink_rate_is_leaf(devlink_rate)) + err = ops->rate_leaf_tx_max_set(devlink_rate, devlink_rate->priv, + rate, info->extack); + else if (devlink_rate_is_node(devlink_rate)) + err = ops->rate_node_tx_max_set(devlink_rate, devlink_rate->priv, + rate, info->extack); + if (err) + return err; + devlink_rate->tx_max = rate; + } + + if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY]) { + priority = nla_get_u32(attrs[DEVLINK_ATTR_RATE_TX_PRIORITY]); + if (devlink_rate_is_leaf(devlink_rate)) + err = ops->rate_leaf_tx_priority_set(devlink_rate, devlink_rate->priv, + priority, info->extack); + else if (devlink_rate_is_node(devlink_rate)) + err = ops->rate_node_tx_priority_set(devlink_rate, devlink_rate->priv, + priority, info->extack); + + if (err) + return err; + devlink_rate->tx_priority = priority; + } + + if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT]) { + weight = nla_get_u32(attrs[DEVLINK_ATTR_RATE_TX_WEIGHT]); + if (devlink_rate_is_leaf(devlink_rate)) + err = ops->rate_leaf_tx_weight_set(devlink_rate, devlink_rate->priv, + weight, info->extack); + else if (devlink_rate_is_node(devlink_rate)) + err = ops->rate_node_tx_weight_set(devlink_rate, devlink_rate->priv, + weight, info->extack); + + if (err) + return err; + devlink_rate->tx_weight = weight; + } + + nla_parent = attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME]; + if (nla_parent) { + err = devlink_nl_rate_parent_node_set(devlink_rate, info, + nla_parent); + if (err) + return err; + } + + return 0; +} + +static bool devlink_rate_set_ops_supported(const struct devlink_ops *ops, + struct genl_info *info, + enum devlink_rate_type type) +{ + struct nlattr **attrs = info->attrs; + + if (type == DEVLINK_RATE_TYPE_LEAF) { + if (attrs[DEVLINK_ATTR_RATE_TX_SHARE] && !ops->rate_leaf_tx_share_set) { + NL_SET_ERR_MSG(info->extack, "TX share set isn't supported for the leafs"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_TX_MAX] && !ops->rate_leaf_tx_max_set) { + NL_SET_ERR_MSG(info->extack, "TX max set isn't supported for the leafs"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] && + !ops->rate_leaf_parent_set) { + NL_SET_ERR_MSG(info->extack, "Parent set isn't supported for the leafs"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY] && !ops->rate_leaf_tx_priority_set) { + NL_SET_ERR_MSG_ATTR(info->extack, + attrs[DEVLINK_ATTR_RATE_TX_PRIORITY], + "TX priority set isn't supported for the leafs"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT] && !ops->rate_leaf_tx_weight_set) { + NL_SET_ERR_MSG_ATTR(info->extack, + attrs[DEVLINK_ATTR_RATE_TX_WEIGHT], + "TX weight set isn't supported for the leafs"); + return false; + } + } else if (type == DEVLINK_RATE_TYPE_NODE) { + if (attrs[DEVLINK_ATTR_RATE_TX_SHARE] && !ops->rate_node_tx_share_set) { + NL_SET_ERR_MSG(info->extack, "TX share set isn't supported for the nodes"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_TX_MAX] && !ops->rate_node_tx_max_set) { + NL_SET_ERR_MSG(info->extack, "TX max set isn't supported for the nodes"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] && + !ops->rate_node_parent_set) { + NL_SET_ERR_MSG(info->extack, "Parent set isn't supported for the nodes"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY] && !ops->rate_node_tx_priority_set) { + NL_SET_ERR_MSG_ATTR(info->extack, + attrs[DEVLINK_ATTR_RATE_TX_PRIORITY], + "TX priority set isn't supported for the nodes"); + return false; + } + if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT] && !ops->rate_node_tx_weight_set) { + NL_SET_ERR_MSG_ATTR(info->extack, + attrs[DEVLINK_ATTR_RATE_TX_WEIGHT], + "TX weight set isn't supported for the nodes"); + return false; + } + } else { + WARN(1, "Unknown type of rate object"); + return false; + } + + return true; +} + +static int devlink_nl_cmd_rate_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_rate *devlink_rate = info->user_ptr[1]; + struct devlink *devlink = devlink_rate->devlink; + const struct devlink_ops *ops = devlink->ops; + int err; + + if (!ops || !devlink_rate_set_ops_supported(ops, info, devlink_rate->type)) + return -EOPNOTSUPP; + + err = devlink_nl_rate_set(devlink_rate, ops, info); + + if (!err) + devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW); + return err; +} + +static int devlink_nl_cmd_rate_new_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_rate *rate_node; + const struct devlink_ops *ops; + int err; + + ops = devlink->ops; + if (!ops || !ops->rate_node_new || !ops->rate_node_del) { + NL_SET_ERR_MSG(info->extack, "Rate nodes aren't supported"); + return -EOPNOTSUPP; + } + + if (!devlink_rate_set_ops_supported(ops, info, DEVLINK_RATE_TYPE_NODE)) + return -EOPNOTSUPP; + + rate_node = devlink_rate_node_get_from_attrs(devlink, info->attrs); + if (!IS_ERR(rate_node)) + return -EEXIST; + else if (rate_node == ERR_PTR(-EINVAL)) + return -EINVAL; + + rate_node = kzalloc(sizeof(*rate_node), GFP_KERNEL); + if (!rate_node) + return -ENOMEM; + + rate_node->devlink = devlink; + rate_node->type = DEVLINK_RATE_TYPE_NODE; + rate_node->name = nla_strdup(info->attrs[DEVLINK_ATTR_RATE_NODE_NAME], GFP_KERNEL); + if (!rate_node->name) { + err = -ENOMEM; + goto err_strdup; + } + + err = ops->rate_node_new(rate_node, &rate_node->priv, info->extack); + if (err) + goto err_node_new; + + err = devlink_nl_rate_set(rate_node, ops, info); + if (err) + goto err_rate_set; + + refcount_set(&rate_node->refcnt, 1); + list_add(&rate_node->list, &devlink->rate_list); + devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW); + return 0; + +err_rate_set: + ops->rate_node_del(rate_node, rate_node->priv, info->extack); +err_node_new: + kfree(rate_node->name); +err_strdup: + kfree(rate_node); + return err; +} + +static int devlink_nl_cmd_rate_del_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_rate *rate_node = info->user_ptr[1]; + struct devlink *devlink = rate_node->devlink; + const struct devlink_ops *ops = devlink->ops; + int err; + + if (refcount_read(&rate_node->refcnt) > 1) { + NL_SET_ERR_MSG(info->extack, "Node has children. Cannot delete node."); + return -EBUSY; + } + + devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_DEL); + err = ops->rate_node_del(rate_node, rate_node->priv, info->extack); + if (rate_node->parent) + refcount_dec(&rate_node->parent->refcnt); + list_del(&rate_node->list); + kfree(rate_node->name); + kfree(rate_node); + return err; +} + +struct devlink_linecard_type { + const char *type; + const void *priv; +}; + +static int devlink_nl_linecard_fill(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_linecard *linecard, + enum devlink_command cmd, u32 portid, + u32 seq, int flags, + struct netlink_ext_ack *extack) +{ + struct devlink_linecard_type *linecard_type; + struct nlattr *attr; + void *hdr; + int i; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, linecard->index)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state)) + goto nla_put_failure; + if (linecard->type && + nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type)) + goto nla_put_failure; + + if (linecard->types_count) { + attr = nla_nest_start(msg, + DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES); + if (!attr) + goto nla_put_failure; + for (i = 0; i < linecard->types_count; i++) { + linecard_type = &linecard->types[i]; + if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, + linecard_type->type)) { + nla_nest_cancel(msg, attr); + goto nla_put_failure; + } + } + nla_nest_end(msg, attr); + } + + if (linecard->nested_devlink && + devlink_nl_put_nested_handle(msg, linecard->nested_devlink)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_linecard_notify(struct devlink_linecard *linecard, + enum devlink_command cmd) +{ + struct devlink *devlink = linecard->devlink; + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW && + cmd != DEVLINK_CMD_LINECARD_DEL); + + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_linecard_fill(msg, devlink, linecard, cmd, 0, 0, 0, + NULL); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int devlink_nl_cmd_linecard_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_linecard *linecard = info->user_ptr[1]; + struct devlink *devlink = linecard->devlink; + struct sk_buff *msg; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + mutex_lock(&linecard->state_lock); + err = devlink_nl_linecard_fill(msg, devlink, linecard, + DEVLINK_CMD_LINECARD_NEW, + info->snd_portid, info->snd_seq, 0, + info->extack); + mutex_unlock(&linecard->state_lock); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_linecard_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_linecard *linecard; + int idx = 0; + int err = 0; + + list_for_each_entry(linecard, &devlink->linecard_list, list) { + if (idx < state->idx) { + idx++; + continue; + } + mutex_lock(&linecard->state_lock); + err = devlink_nl_linecard_fill(msg, devlink, linecard, + DEVLINK_CMD_LINECARD_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, + cb->extack); + mutex_unlock(&linecard->state_lock); + if (err) { + state->idx = idx; + break; + } + idx++; + } + + return err; +} + +const struct devlink_cmd devl_cmd_linecard_get = { + .dump_one = devlink_nl_cmd_linecard_get_dump_one, +}; + +static struct devlink_linecard_type * +devlink_linecard_type_lookup(struct devlink_linecard *linecard, + const char *type) +{ + struct devlink_linecard_type *linecard_type; + int i; + + for (i = 0; i < linecard->types_count; i++) { + linecard_type = &linecard->types[i]; + if (!strcmp(type, linecard_type->type)) + return linecard_type; + } + return NULL; +} + +static int devlink_linecard_type_set(struct devlink_linecard *linecard, + const char *type, + struct netlink_ext_ack *extack) +{ + const struct devlink_linecard_ops *ops = linecard->ops; + struct devlink_linecard_type *linecard_type; + int err; + + mutex_lock(&linecard->state_lock); + if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) { + NL_SET_ERR_MSG(extack, "Line card is currently being provisioned"); + err = -EBUSY; + goto out; + } + if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) { + NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned"); + err = -EBUSY; + goto out; + } + + linecard_type = devlink_linecard_type_lookup(linecard, type); + if (!linecard_type) { + NL_SET_ERR_MSG(extack, "Unsupported line card type provided"); + err = -EINVAL; + goto out; + } + + if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED && + linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) { + NL_SET_ERR_MSG(extack, "Line card already provisioned"); + err = -EBUSY; + /* Check if the line card is provisioned in the same + * way the user asks. In case it is, make the operation + * to return success. + */ + if (ops->same_provision && + ops->same_provision(linecard, linecard->priv, + linecard_type->type, + linecard_type->priv)) + err = 0; + goto out; + } + + linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING; + linecard->type = linecard_type->type; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); + err = ops->provision(linecard, linecard->priv, linecard_type->type, + linecard_type->priv, extack); + if (err) { + /* Provisioning failed. Assume the linecard is unprovisioned + * for future operations. + */ + mutex_lock(&linecard->state_lock); + linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; + linecard->type = NULL; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); + } + return err; + +out: + mutex_unlock(&linecard->state_lock); + return err; +} + +static int devlink_linecard_type_unset(struct devlink_linecard *linecard, + struct netlink_ext_ack *extack) +{ + int err; + + mutex_lock(&linecard->state_lock); + if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) { + NL_SET_ERR_MSG(extack, "Line card is currently being provisioned"); + err = -EBUSY; + goto out; + } + if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) { + NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned"); + err = -EBUSY; + goto out; + } + if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) { + linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; + linecard->type = NULL; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + err = 0; + goto out; + } + + if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) { + NL_SET_ERR_MSG(extack, "Line card is not provisioned"); + err = 0; + goto out; + } + linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); + err = linecard->ops->unprovision(linecard, linecard->priv, + extack); + if (err) { + /* Unprovisioning failed. Assume the linecard is unprovisioned + * for future operations. + */ + mutex_lock(&linecard->state_lock); + linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; + linecard->type = NULL; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); + } + return err; + +out: + mutex_unlock(&linecard->state_lock); + return err; +} + +static int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_linecard *linecard = info->user_ptr[1]; + struct netlink_ext_ack *extack = info->extack; + int err; + + if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) { + const char *type; + + type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]); + if (strcmp(type, "")) { + err = devlink_linecard_type_set(linecard, type, extack); + if (err) + return err; + } else { + err = devlink_linecard_type_unset(linecard, extack); + if (err) + return err; + } + } + + return 0; +} + +static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_sb *devlink_sb, + enum devlink_command cmd, u32 portid, + u32 seq, int flags) +{ + void *hdr; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT, + devlink_sb->ingress_pools_count)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT, + devlink_sb->egress_pools_count)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT, + devlink_sb->ingress_tc_count)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT, + devlink_sb->egress_tc_count)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_fill(msg, devlink, devlink_sb, + DEVLINK_CMD_SB_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int +devlink_nl_cmd_sb_get_dump_one(struct sk_buff *msg, struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_sb *devlink_sb; + int idx = 0; + int err = 0; + + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + if (idx < state->idx) { + idx++; + continue; + } + err = devlink_nl_sb_fill(msg, devlink, devlink_sb, + DEVLINK_CMD_SB_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + state->idx = idx; + break; + } + idx++; + } + + return err; +} + +const struct devlink_cmd devl_cmd_sb_get = { + .dump_one = devlink_nl_cmd_sb_get_dump_one, +}; + +static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_sb *devlink_sb, + u16 pool_index, enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + struct devlink_sb_pool_info pool_info; + void *hdr; + int err; + + err = devlink->ops->sb_pool_get(devlink, devlink_sb->index, + pool_index, &pool_info); + if (err) + return err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE, + pool_info.threshold_type)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE, + pool_info.cell_size)) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + u16 pool_index; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (!devlink->ops->sb_pool_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index, + DEVLINK_CMD_SB_POOL_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx, + struct devlink *devlink, + struct devlink_sb *devlink_sb, + u32 portid, u32 seq) +{ + u16 pool_count = devlink_sb_pool_count(devlink_sb); + u16 pool_index; + int err; + + for (pool_index = 0; pool_index < pool_count; pool_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_pool_fill(msg, devlink, + devlink_sb, + pool_index, + DEVLINK_CMD_SB_POOL_NEW, + portid, seq, NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + return 0; +} + +static int +devlink_nl_cmd_sb_pool_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_sb *devlink_sb; + int err = 0; + int idx = 0; + + if (!devlink->ops->sb_pool_get) + return 0; + + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + err = __sb_pool_get_dumpit(msg, state->idx, &idx, + devlink, devlink_sb, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + state->idx = idx; + break; + } + } + + return err; +} + +const struct devlink_cmd devl_cmd_sb_pool_get = { + .dump_one = devlink_nl_cmd_sb_pool_get_dump_one, +}; + +static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index, + u16 pool_index, u32 size, + enum devlink_sb_threshold_type threshold_type, + struct netlink_ext_ack *extack) + +{ + const struct devlink_ops *ops = devlink->ops; + + if (ops->sb_pool_set) + return ops->sb_pool_set(devlink, sb_index, pool_index, + size, threshold_type, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + enum devlink_sb_threshold_type threshold_type; + struct devlink_sb *devlink_sb; + u16 pool_index; + u32 size; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + err = devlink_sb_th_type_get_from_info(info, &threshold_type); + if (err) + return err; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SB_POOL_SIZE)) + return -EINVAL; + + size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]); + return devlink_sb_pool_set(devlink, devlink_sb->index, + pool_index, size, threshold_type, + info->extack); +} + +static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_port *devlink_port, + struct devlink_sb *devlink_sb, + u16 pool_index, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + const struct devlink_ops *ops = devlink->ops; + u32 threshold; + void *hdr; + int err; + + err = ops->sb_port_pool_get(devlink_port, devlink_sb->index, + pool_index, &threshold); + if (err) + return err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold)) + goto nla_put_failure; + + if (ops->sb_occ_port_pool_get) { + u32 cur; + u32 max; + + err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index, + pool_index, &cur, &max); + if (err && err != -EOPNOTSUPP) + goto sb_occ_get_failure; + if (!err) { + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max)) + goto nla_put_failure; + } + } + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + err = -EMSGSIZE; +sb_occ_get_failure: + genlmsg_cancel(msg, hdr); + return err; +} + +static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = devlink_port->devlink; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + u16 pool_index; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (!devlink->ops->sb_port_pool_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port, + devlink_sb, pool_index, + DEVLINK_CMD_SB_PORT_POOL_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx, + struct devlink *devlink, + struct devlink_sb *devlink_sb, + u32 portid, u32 seq) +{ + struct devlink_port *devlink_port; + u16 pool_count = devlink_sb_pool_count(devlink_sb); + unsigned long port_index; + u16 pool_index; + int err; + + xa_for_each(&devlink->ports, port_index, devlink_port) { + for (pool_index = 0; pool_index < pool_count; pool_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_port_pool_fill(msg, devlink, + devlink_port, + devlink_sb, + pool_index, + DEVLINK_CMD_SB_PORT_POOL_NEW, + portid, seq, + NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + } + return 0; +} + +static int +devlink_nl_cmd_sb_port_pool_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_sb *devlink_sb; + int idx = 0; + int err = 0; + + if (!devlink->ops->sb_port_pool_get) + return 0; + + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + err = __sb_port_pool_get_dumpit(msg, state->idx, &idx, + devlink, devlink_sb, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + state->idx = idx; + break; + } + } + + return err; +} + +const struct devlink_cmd devl_cmd_sb_port_pool_get = { + .dump_one = devlink_nl_cmd_sb_port_pool_get_dump_one, +}; + +static int devlink_sb_port_pool_set(struct devlink_port *devlink_port, + unsigned int sb_index, u16 pool_index, + u32 threshold, + struct netlink_ext_ack *extack) + +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + + if (ops->sb_port_pool_set) + return ops->sb_port_pool_set(devlink_port, sb_index, + pool_index, threshold, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = info->user_ptr[0]; + struct devlink_sb *devlink_sb; + u16 pool_index; + u32 threshold; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SB_THRESHOLD)) + return -EINVAL; + + threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]); + return devlink_sb_port_pool_set(devlink_port, devlink_sb->index, + pool_index, threshold, info->extack); +} + +static int +devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink, + struct devlink_port *devlink_port, + struct devlink_sb *devlink_sb, u16 tc_index, + enum devlink_sb_pool_type pool_type, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + const struct devlink_ops *ops = devlink->ops; + u16 pool_index; + u32 threshold; + void *hdr; + int err; + + err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index, + tc_index, pool_type, + &pool_index, &threshold); + if (err) + return err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index)) + goto nla_put_failure; + if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type)) + goto nla_put_failure; + if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold)) + goto nla_put_failure; + + if (ops->sb_occ_tc_port_bind_get) { + u32 cur; + u32 max; + + err = ops->sb_occ_tc_port_bind_get(devlink_port, + devlink_sb->index, + tc_index, pool_type, + &cur, &max); + if (err && err != -EOPNOTSUPP) + return err; + if (!err) { + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur)) + goto nla_put_failure; + if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max)) + goto nla_put_failure; + } + } + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = devlink_port->devlink; + struct devlink_sb *devlink_sb; + struct sk_buff *msg; + enum devlink_sb_pool_type pool_type; + u16 tc_index; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_type_get_from_info(info, &pool_type); + if (err) + return err; + + err = devlink_sb_tc_index_get_from_info(devlink_sb, info, + pool_type, &tc_index); + if (err) + return err; + + if (!devlink->ops->sb_tc_pool_bind_get) + return -EOPNOTSUPP; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port, + devlink_sb, tc_index, pool_type, + DEVLINK_CMD_SB_TC_POOL_BIND_NEW, + info->snd_portid, + info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg, + int start, int *p_idx, + struct devlink *devlink, + struct devlink_sb *devlink_sb, + u32 portid, u32 seq) +{ + struct devlink_port *devlink_port; + unsigned long port_index; + u16 tc_index; + int err; + + xa_for_each(&devlink->ports, port_index, devlink_port) { + for (tc_index = 0; + tc_index < devlink_sb->ingress_tc_count; tc_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, + devlink_port, + devlink_sb, + tc_index, + DEVLINK_SB_POOL_TYPE_INGRESS, + DEVLINK_CMD_SB_TC_POOL_BIND_NEW, + portid, seq, + NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + for (tc_index = 0; + tc_index < devlink_sb->egress_tc_count; tc_index++) { + if (*p_idx < start) { + (*p_idx)++; + continue; + } + err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, + devlink_port, + devlink_sb, + tc_index, + DEVLINK_SB_POOL_TYPE_EGRESS, + DEVLINK_CMD_SB_TC_POOL_BIND_NEW, + portid, seq, + NLM_F_MULTI); + if (err) + return err; + (*p_idx)++; + } + } + return 0; +} + +static int +devlink_nl_cmd_sb_tc_pool_bind_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_sb *devlink_sb; + int idx = 0; + int err = 0; + + if (!devlink->ops->sb_tc_pool_bind_get) + return 0; + + list_for_each_entry(devlink_sb, &devlink->sb_list, list) { + err = __sb_tc_pool_bind_get_dumpit(msg, state->idx, &idx, + devlink, devlink_sb, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + state->idx = idx; + break; + } + } + + return err; +} + +const struct devlink_cmd devl_cmd_sb_tc_pool_bind_get = { + .dump_one = devlink_nl_cmd_sb_tc_pool_bind_get_dump_one, +}; + +static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port, + unsigned int sb_index, u16 tc_index, + enum devlink_sb_pool_type pool_type, + u16 pool_index, u32 threshold, + struct netlink_ext_ack *extack) + +{ + const struct devlink_ops *ops = devlink_port->devlink->ops; + + if (ops->sb_tc_pool_bind_set) + return ops->sb_tc_pool_bind_set(devlink_port, sb_index, + tc_index, pool_type, + pool_index, threshold, extack); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_port *devlink_port = info->user_ptr[1]; + struct devlink *devlink = info->user_ptr[0]; + enum devlink_sb_pool_type pool_type; + struct devlink_sb *devlink_sb; + u16 tc_index; + u16 pool_index; + u32 threshold; + int err; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + err = devlink_sb_pool_type_get_from_info(info, &pool_type); + if (err) + return err; + + err = devlink_sb_tc_index_get_from_info(devlink_sb, info, + pool_type, &tc_index); + if (err) + return err; + + err = devlink_sb_pool_index_get_from_info(devlink_sb, info, + &pool_index); + if (err) + return err; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SB_THRESHOLD)) + return -EINVAL; + + threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]); + return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index, + tc_index, pool_type, + pool_index, threshold, info->extack); +} + +static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const struct devlink_ops *ops = devlink->ops; + struct devlink_sb *devlink_sb; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + if (ops->sb_occ_snapshot) + return ops->sb_occ_snapshot(devlink, devlink_sb->index); + return -EOPNOTSUPP; +} + +static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const struct devlink_ops *ops = devlink->ops; + struct devlink_sb *devlink_sb; + + devlink_sb = devlink_sb_get_from_info(devlink, info); + if (IS_ERR(devlink_sb)) + return PTR_ERR(devlink_sb); + + if (ops->sb_occ_max_clear) + return ops->sb_occ_max_clear(devlink, devlink_sb->index); + return -EOPNOTSUPP; +} + +int devlink_rate_nodes_check(struct devlink *devlink, u16 mode, + struct netlink_ext_ack *extack) +{ + struct devlink_rate *devlink_rate; + + list_for_each_entry(devlink_rate, &devlink->rate_list, list) + if (devlink_rate_is_node(devlink_rate)) { + NL_SET_ERR_MSG(extack, "Rate node(s) exists."); + return -EBUSY; + } + return 0; +} + +int devlink_dpipe_match_put(struct sk_buff *skb, + struct devlink_dpipe_match *match) +{ + struct devlink_dpipe_header *header = match->header; + struct devlink_dpipe_field *field = &header->fields[match->field_id]; + struct nlattr *match_attr; + + match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH); + if (!match_attr) + return -EMSGSIZE; + + if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) || + nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global)) + goto nla_put_failure; + + nla_nest_end(skb, match_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, match_attr); + return -EMSGSIZE; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_match_put); + +static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table, + struct sk_buff *skb) +{ + struct nlattr *matches_attr; + + matches_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_TABLE_MATCHES); + if (!matches_attr) + return -EMSGSIZE; + + if (table->table_ops->matches_dump(table->priv, skb)) + goto nla_put_failure; + + nla_nest_end(skb, matches_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, matches_attr); + return -EMSGSIZE; +} + +int devlink_dpipe_action_put(struct sk_buff *skb, + struct devlink_dpipe_action *action) +{ + struct devlink_dpipe_header *header = action->header; + struct devlink_dpipe_field *field = &header->fields[action->field_id]; + struct nlattr *action_attr; + + action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION); + if (!action_attr) + return -EMSGSIZE; + + if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) || + nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global)) + goto nla_put_failure; + + nla_nest_end(skb, action_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, action_attr); + return -EMSGSIZE; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_action_put); + +static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table, + struct sk_buff *skb) +{ + struct nlattr *actions_attr; + + actions_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_TABLE_ACTIONS); + if (!actions_attr) + return -EMSGSIZE; + + if (table->table_ops->actions_dump(table->priv, skb)) + goto nla_put_failure; + + nla_nest_end(skb, actions_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, actions_attr); + return -EMSGSIZE; +} + +static int devlink_dpipe_table_put(struct sk_buff *skb, + struct devlink_dpipe_table *table) +{ + struct nlattr *table_attr; + u64 table_size; + + table_size = table->table_ops->size_get(table->priv); + table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE); + if (!table_attr) + return -EMSGSIZE; + + if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED, + table->counters_enabled)) + goto nla_put_failure; + + if (table->resource_valid) { + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID, + table->resource_id, DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS, + table->resource_units, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + } + if (devlink_dpipe_matches_put(table, skb)) + goto nla_put_failure; + + if (devlink_dpipe_actions_put(table, skb)) + goto nla_put_failure; + + nla_nest_end(skb, table_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(skb, table_attr); + return -EMSGSIZE; +} + +static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb, + struct genl_info *info) +{ + int err; + + if (*pskb) { + err = genlmsg_reply(*pskb, info); + if (err) + return err; + } + *pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!*pskb) + return -ENOMEM; + return 0; +} + +static int devlink_dpipe_tables_fill(struct genl_info *info, + enum devlink_command cmd, int flags, + struct list_head *dpipe_tables, + const char *table_name) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_dpipe_table *table; + struct nlattr *tables_attr; + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + bool incomplete; + void *hdr; + int i; + int err; + + table = list_first_entry(dpipe_tables, + struct devlink_dpipe_table, list); +start_again: + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + + hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, cmd); + if (!hdr) { + nlmsg_free(skb); + return -EMSGSIZE; + } + + if (devlink_nl_put_handle(skb, devlink)) + goto nla_put_failure; + tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES); + if (!tables_attr) + goto nla_put_failure; + + i = 0; + incomplete = false; + list_for_each_entry_from(table, dpipe_tables, list) { + if (!table_name) { + err = devlink_dpipe_table_put(skb, table); + if (err) { + if (!i) + goto err_table_put; + incomplete = true; + break; + } + } else { + if (!strcmp(table->name, table_name)) { + err = devlink_dpipe_table_put(skb, table); + if (err) + break; + } + } + i++; + } + + nla_nest_end(skb, tables_attr); + genlmsg_end(skb, hdr); + if (incomplete) + goto start_again; + +send_done: + nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + goto send_done; + } + + return genlmsg_reply(skb, info); + +nla_put_failure: + err = -EMSGSIZE; +err_table_put: + nlmsg_free(skb); + return err; +} + +static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const char *table_name = NULL; + + if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]) + table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]); + + return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0, + &devlink->dpipe_table_list, + table_name); +} + +static int devlink_dpipe_value_put(struct sk_buff *skb, + struct devlink_dpipe_value *value) +{ + if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE, + value->value_size, value->value)) + return -EMSGSIZE; + if (value->mask) + if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK, + value->value_size, value->mask)) + return -EMSGSIZE; + if (value->mapping_valid) + if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING, + value->mapping_value)) + return -EMSGSIZE; + return 0; +} + +static int devlink_dpipe_action_value_put(struct sk_buff *skb, + struct devlink_dpipe_value *value) +{ + if (!value->action) + return -EINVAL; + if (devlink_dpipe_action_put(skb, value->action)) + return -EMSGSIZE; + if (devlink_dpipe_value_put(skb, value)) + return -EMSGSIZE; + return 0; +} + +static int devlink_dpipe_action_values_put(struct sk_buff *skb, + struct devlink_dpipe_value *values, + unsigned int values_count) +{ + struct nlattr *action_attr; + int i; + int err; + + for (i = 0; i < values_count; i++) { + action_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_ACTION_VALUE); + if (!action_attr) + return -EMSGSIZE; + err = devlink_dpipe_action_value_put(skb, &values[i]); + if (err) + goto err_action_value_put; + nla_nest_end(skb, action_attr); + } + return 0; + +err_action_value_put: + nla_nest_cancel(skb, action_attr); + return err; +} + +static int devlink_dpipe_match_value_put(struct sk_buff *skb, + struct devlink_dpipe_value *value) +{ + if (!value->match) + return -EINVAL; + if (devlink_dpipe_match_put(skb, value->match)) + return -EMSGSIZE; + if (devlink_dpipe_value_put(skb, value)) + return -EMSGSIZE; + return 0; +} + +static int devlink_dpipe_match_values_put(struct sk_buff *skb, + struct devlink_dpipe_value *values, + unsigned int values_count) +{ + struct nlattr *match_attr; + int i; + int err; + + for (i = 0; i < values_count; i++) { + match_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_MATCH_VALUE); + if (!match_attr) + return -EMSGSIZE; + err = devlink_dpipe_match_value_put(skb, &values[i]); + if (err) + goto err_match_value_put; + nla_nest_end(skb, match_attr); + } + return 0; + +err_match_value_put: + nla_nest_cancel(skb, match_attr); + return err; +} + +static int devlink_dpipe_entry_put(struct sk_buff *skb, + struct devlink_dpipe_entry *entry) +{ + struct nlattr *entry_attr, *matches_attr, *actions_attr; + int err; + + entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY); + if (!entry_attr) + return -EMSGSIZE; + + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (entry->counter_valid) + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER, + entry->counter, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + matches_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES); + if (!matches_attr) + goto nla_put_failure; + + err = devlink_dpipe_match_values_put(skb, entry->match_values, + entry->match_values_count); + if (err) { + nla_nest_cancel(skb, matches_attr); + goto err_match_values_put; + } + nla_nest_end(skb, matches_attr); + + actions_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES); + if (!actions_attr) + goto nla_put_failure; + + err = devlink_dpipe_action_values_put(skb, entry->action_values, + entry->action_values_count); + if (err) { + nla_nest_cancel(skb, actions_attr); + goto err_action_values_put; + } + nla_nest_end(skb, actions_attr); + + nla_nest_end(skb, entry_attr); + return 0; + +nla_put_failure: + err = -EMSGSIZE; +err_match_values_put: +err_action_values_put: + nla_nest_cancel(skb, entry_attr); + return err; +} + +static struct devlink_dpipe_table * +devlink_dpipe_table_find(struct list_head *dpipe_tables, + const char *table_name, struct devlink *devlink) +{ + struct devlink_dpipe_table *table; + list_for_each_entry_rcu(table, dpipe_tables, list, + lockdep_is_held(&devlink->lock)) { + if (!strcmp(table->name, table_name)) + return table; + } + return NULL; +} + +int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx) +{ + struct devlink *devlink; + int err; + + err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb, + dump_ctx->info); + if (err) + return err; + + dump_ctx->hdr = genlmsg_put(dump_ctx->skb, + dump_ctx->info->snd_portid, + dump_ctx->info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, + dump_ctx->cmd); + if (!dump_ctx->hdr) + goto nla_put_failure; + + devlink = dump_ctx->info->user_ptr[0]; + if (devlink_nl_put_handle(dump_ctx->skb, devlink)) + goto nla_put_failure; + dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb, + DEVLINK_ATTR_DPIPE_ENTRIES); + if (!dump_ctx->nest) + goto nla_put_failure; + return 0; + +nla_put_failure: + nlmsg_free(dump_ctx->skb); + return -EMSGSIZE; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare); + +int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx, + struct devlink_dpipe_entry *entry) +{ + return devlink_dpipe_entry_put(dump_ctx->skb, entry); +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append); + +int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx) +{ + nla_nest_end(dump_ctx->skb, dump_ctx->nest); + genlmsg_end(dump_ctx->skb, dump_ctx->hdr); + return 0; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close); + +void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry) + +{ + unsigned int value_count, value_index; + struct devlink_dpipe_value *value; + + value = entry->action_values; + value_count = entry->action_values_count; + for (value_index = 0; value_index < value_count; value_index++) { + kfree(value[value_index].value); + kfree(value[value_index].mask); + } + + value = entry->match_values; + value_count = entry->match_values_count; + for (value_index = 0; value_index < value_count; value_index++) { + kfree(value[value_index].value); + kfree(value[value_index].mask); + } +} +EXPORT_SYMBOL_GPL(devlink_dpipe_entry_clear); + +static int devlink_dpipe_entries_fill(struct genl_info *info, + enum devlink_command cmd, int flags, + struct devlink_dpipe_table *table) +{ + struct devlink_dpipe_dump_ctx dump_ctx; + struct nlmsghdr *nlh; + int err; + + dump_ctx.skb = NULL; + dump_ctx.cmd = cmd; + dump_ctx.info = info; + + err = table->table_ops->entries_dump(table->priv, + table->counters_enabled, + &dump_ctx); + if (err) + return err; + +send_done: + nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info); + if (err) + return err; + goto send_done; + } + return genlmsg_reply(dump_ctx.skb, info); +} + +static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_dpipe_table *table; + const char *table_name; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_DPIPE_TABLE_NAME)) + return -EINVAL; + + table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]); + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return -EINVAL; + + if (!table->table_ops->entries_dump) + return -EINVAL; + + return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET, + 0, table); +} + +static int devlink_dpipe_fields_put(struct sk_buff *skb, + const struct devlink_dpipe_header *header) +{ + struct devlink_dpipe_field *field; + struct nlattr *field_attr; + int i; + + for (i = 0; i < header->fields_count; i++) { + field = &header->fields[i]; + field_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_FIELD); + if (!field_attr) + return -EMSGSIZE; + if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type)) + goto nla_put_failure; + nla_nest_end(skb, field_attr); + } + return 0; + +nla_put_failure: + nla_nest_cancel(skb, field_attr); + return -EMSGSIZE; +} + +static int devlink_dpipe_header_put(struct sk_buff *skb, + struct devlink_dpipe_header *header) +{ + struct nlattr *fields_attr, *header_attr; + int err; + + header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER); + if (!header_attr) + return -EMSGSIZE; + + if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) || + nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) || + nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global)) + goto nla_put_failure; + + fields_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_DPIPE_HEADER_FIELDS); + if (!fields_attr) + goto nla_put_failure; + + err = devlink_dpipe_fields_put(skb, header); + if (err) { + nla_nest_cancel(skb, fields_attr); + goto nla_put_failure; + } + nla_nest_end(skb, fields_attr); + nla_nest_end(skb, header_attr); + return 0; + +nla_put_failure: + err = -EMSGSIZE; + nla_nest_cancel(skb, header_attr); + return err; +} + +static int devlink_dpipe_headers_fill(struct genl_info *info, + enum devlink_command cmd, int flags, + struct devlink_dpipe_headers * + dpipe_headers) +{ + struct devlink *devlink = info->user_ptr[0]; + struct nlattr *headers_attr; + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + void *hdr; + int i, j; + int err; + + i = 0; +start_again: + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + + hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, cmd); + if (!hdr) { + nlmsg_free(skb); + return -EMSGSIZE; + } + + if (devlink_nl_put_handle(skb, devlink)) + goto nla_put_failure; + headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS); + if (!headers_attr) + goto nla_put_failure; + + j = 0; + for (; i < dpipe_headers->headers_count; i++) { + err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]); + if (err) { + if (!j) + goto err_table_put; + break; + } + j++; + } + nla_nest_end(skb, headers_attr); + genlmsg_end(skb, hdr); + if (i != dpipe_headers->headers_count) + goto start_again; + +send_done: + nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + goto send_done; + } + return genlmsg_reply(skb, info); + +nla_put_failure: + err = -EMSGSIZE; +err_table_put: + nlmsg_free(skb); + return err; +} + +static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + if (!devlink->dpipe_headers) + return -EOPNOTSUPP; + return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET, + 0, devlink->dpipe_headers); +} + +static int devlink_dpipe_table_counters_set(struct devlink *devlink, + const char *table_name, + bool enable) +{ + struct devlink_dpipe_table *table; + + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return -EINVAL; + + if (table->counter_control_extern) + return -EOPNOTSUPP; + + if (!(table->counters_enabled ^ enable)) + return 0; + + table->counters_enabled = enable; + if (table->table_ops->counters_set_update) + table->table_ops->counters_set_update(table->priv, enable); + return 0; +} + +static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + const char *table_name; + bool counters_enable; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_DPIPE_TABLE_NAME) || + GENL_REQ_ATTR_CHECK(info, + DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED)) + return -EINVAL; + + table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]); + counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]); + + return devlink_dpipe_table_counters_set(devlink, table_name, + counters_enable); +} + +static struct devlink_resource * +devlink_resource_find(struct devlink *devlink, + struct devlink_resource *resource, u64 resource_id) +{ + struct list_head *resource_list; + + if (resource) + resource_list = &resource->resource_list; + else + resource_list = &devlink->resource_list; + + list_for_each_entry(resource, resource_list, list) { + struct devlink_resource *child_resource; + + if (resource->id == resource_id) + return resource; + + child_resource = devlink_resource_find(devlink, resource, + resource_id); + if (child_resource) + return child_resource; + } + return NULL; +} + +static void +devlink_resource_validate_children(struct devlink_resource *resource) +{ + struct devlink_resource *child_resource; + bool size_valid = true; + u64 parts_size = 0; + + if (list_empty(&resource->resource_list)) + goto out; + + list_for_each_entry(child_resource, &resource->resource_list, list) + parts_size += child_resource->size_new; + + if (parts_size > resource->size_new) + size_valid = false; +out: + resource->size_valid = size_valid; +} + +static int +devlink_resource_validate_size(struct devlink_resource *resource, u64 size, + struct netlink_ext_ack *extack) +{ + u64 reminder; + int err = 0; + + if (size > resource->size_params.size_max) { + NL_SET_ERR_MSG(extack, "Size larger than maximum"); + err = -EINVAL; + } + + if (size < resource->size_params.size_min) { + NL_SET_ERR_MSG(extack, "Size smaller than minimum"); + err = -EINVAL; + } + + div64_u64_rem(size, resource->size_params.size_granularity, &reminder); + if (reminder) { + NL_SET_ERR_MSG(extack, "Wrong granularity"); + err = -EINVAL; + } + + return err; +} + +static int devlink_nl_cmd_resource_set(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_resource *resource; + u64 resource_id; + u64 size; + int err; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_RESOURCE_ID) || + GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_RESOURCE_SIZE)) + return -EINVAL; + resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]); + + resource = devlink_resource_find(devlink, NULL, resource_id); + if (!resource) + return -EINVAL; + + size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]); + err = devlink_resource_validate_size(resource, size, info->extack); + if (err) + return err; + + resource->size_new = size; + devlink_resource_validate_children(resource); + if (resource->parent) + devlink_resource_validate_children(resource->parent); + return 0; +} + +static int +devlink_resource_size_params_put(struct devlink_resource *resource, + struct sk_buff *skb) +{ + struct devlink_resource_size_params *size_params; + + size_params = &resource->size_params; + if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN, + size_params->size_granularity, DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX, + size_params->size_max, DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN, + size_params->size_min, DEVLINK_ATTR_PAD) || + nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit)) + return -EMSGSIZE; + return 0; +} + +static int devlink_resource_occ_put(struct devlink_resource *resource, + struct sk_buff *skb) +{ + if (!resource->occ_get) + return 0; + return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC, + resource->occ_get(resource->occ_get_priv), + DEVLINK_ATTR_PAD); +} + +static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb, + struct devlink_resource *resource) +{ + struct devlink_resource *child_resource; + struct nlattr *child_resource_attr; + struct nlattr *resource_attr; + + resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE); + if (!resource_attr) + return -EMSGSIZE; + + if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size, + DEVLINK_ATTR_PAD) || + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (resource->size != resource->size_new && + nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW, + resource->size_new, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + if (devlink_resource_occ_put(resource, skb)) + goto nla_put_failure; + if (devlink_resource_size_params_put(resource, skb)) + goto nla_put_failure; + if (list_empty(&resource->resource_list)) + goto out; + + if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID, + resource->size_valid)) + goto nla_put_failure; + + child_resource_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_RESOURCE_LIST); + if (!child_resource_attr) + goto nla_put_failure; + + list_for_each_entry(child_resource, &resource->resource_list, list) { + if (devlink_resource_put(devlink, skb, child_resource)) + goto resource_put_failure; + } + + nla_nest_end(skb, child_resource_attr); +out: + nla_nest_end(skb, resource_attr); + return 0; + +resource_put_failure: + nla_nest_cancel(skb, child_resource_attr); +nla_put_failure: + nla_nest_cancel(skb, resource_attr); + return -EMSGSIZE; +} + +static int devlink_resource_fill(struct genl_info *info, + enum devlink_command cmd, int flags) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_resource *resource; + struct nlattr *resources_attr; + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + bool incomplete; + void *hdr; + int i; + int err; + + resource = list_first_entry(&devlink->resource_list, + struct devlink_resource, list); +start_again: + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + + hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, + &devlink_nl_family, NLM_F_MULTI, cmd); + if (!hdr) { + nlmsg_free(skb); + return -EMSGSIZE; + } + + if (devlink_nl_put_handle(skb, devlink)) + goto nla_put_failure; + + resources_attr = nla_nest_start_noflag(skb, + DEVLINK_ATTR_RESOURCE_LIST); + if (!resources_attr) + goto nla_put_failure; + + incomplete = false; + i = 0; + list_for_each_entry_from(resource, &devlink->resource_list, list) { + err = devlink_resource_put(devlink, skb, resource); + if (err) { + if (!i) + goto err_resource_put; + incomplete = true; + break; + } + i++; + } + nla_nest_end(skb, resources_attr); + genlmsg_end(skb, hdr); + if (incomplete) + goto start_again; +send_done: + nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq, + NLMSG_DONE, 0, flags | NLM_F_MULTI); + if (!nlh) { + err = devlink_dpipe_send_and_alloc_skb(&skb, info); + if (err) + return err; + goto send_done; + } + return genlmsg_reply(skb, info); + +nla_put_failure: + err = -EMSGSIZE; +err_resource_put: + nlmsg_free(skb); + return err; +} + +static int devlink_nl_cmd_resource_dump(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + if (list_empty(&devlink->resource_list)) + return -EOPNOTSUPP; + + return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0); +} + +int devlink_resources_validate(struct devlink *devlink, + struct devlink_resource *resource, + struct genl_info *info) +{ + struct list_head *resource_list; + int err = 0; + + if (resource) + resource_list = &resource->resource_list; + else + resource_list = &devlink->resource_list; + + list_for_each_entry(resource, resource_list, list) { + if (!resource->size_valid) + return -EINVAL; + err = devlink_resources_validate(devlink, resource, info); + if (err) + return err; + } + return err; +} + +static const struct devlink_param devlink_param_generic[] = { + { + .id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET, + .name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME, + .type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS, + .name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME, + .type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, + .name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT, + .name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME, + .type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI, + .name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME, + .type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX, + .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME, + .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN, + .name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME, + .type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, + .name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME, + .type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE, + .name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME, + .type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE, + .name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET, + .name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH, + .name = DEVLINK_PARAM_GENERIC_ENABLE_ETH_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_ETH_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA, + .name = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_RDMA_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET, + .name = DEVLINK_PARAM_GENERIC_ENABLE_VNET_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_VNET_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP, + .name = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_NAME, + .type = DEVLINK_PARAM_GENERIC_ENABLE_IWARP_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE, + .name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME, + .type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE, + }, + { + .id = DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE, + .name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME, + .type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE, + }, +}; + +static int devlink_param_generic_verify(const struct devlink_param *param) +{ + /* verify it match generic parameter by id and name */ + if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX) + return -EINVAL; + if (strcmp(param->name, devlink_param_generic[param->id].name)) + return -ENOENT; + + WARN_ON(param->type != devlink_param_generic[param->id].type); + + return 0; +} + +static int devlink_param_driver_verify(const struct devlink_param *param) +{ + int i; + + if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX) + return -EINVAL; + /* verify no such name in generic params */ + for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++) + if (!strcmp(param->name, devlink_param_generic[i].name)) + return -EEXIST; + + return 0; +} + +static struct devlink_param_item * +devlink_param_find_by_name(struct xarray *params, const char *param_name) +{ + struct devlink_param_item *param_item; + unsigned long param_id; + + xa_for_each(params, param_id, param_item) { + if (!strcmp(param_item->param->name, param_name)) + return param_item; + } + return NULL; +} + +static struct devlink_param_item * +devlink_param_find_by_id(struct xarray *params, u32 param_id) +{ + return xa_load(params, param_id); +} + +static bool +devlink_param_cmode_is_supported(const struct devlink_param *param, + enum devlink_param_cmode cmode) +{ + return test_bit(cmode, ¶m->supported_cmodes); +} + +static int devlink_param_get(struct devlink *devlink, + const struct devlink_param *param, + struct devlink_param_gset_ctx *ctx) +{ + if (!param->get || devlink->reload_failed) + return -EOPNOTSUPP; + return param->get(devlink, param->id, ctx); +} + +static int devlink_param_set(struct devlink *devlink, + const struct devlink_param *param, + struct devlink_param_gset_ctx *ctx) +{ + if (!param->set || devlink->reload_failed) + return -EOPNOTSUPP; + return param->set(devlink, param->id, ctx); +} + +static int +devlink_param_type_to_nla_type(enum devlink_param_type param_type) +{ + switch (param_type) { + case DEVLINK_PARAM_TYPE_U8: + return NLA_U8; + case DEVLINK_PARAM_TYPE_U16: + return NLA_U16; + case DEVLINK_PARAM_TYPE_U32: + return NLA_U32; + case DEVLINK_PARAM_TYPE_STRING: + return NLA_STRING; + case DEVLINK_PARAM_TYPE_BOOL: + return NLA_FLAG; + default: + return -EINVAL; + } +} + +static int +devlink_nl_param_value_fill_one(struct sk_buff *msg, + enum devlink_param_type type, + enum devlink_param_cmode cmode, + union devlink_param_value val) +{ + struct nlattr *param_value_attr; + + param_value_attr = nla_nest_start_noflag(msg, + DEVLINK_ATTR_PARAM_VALUE); + if (!param_value_attr) + goto nla_put_failure; + + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode)) + goto value_nest_cancel; + + switch (type) { + case DEVLINK_PARAM_TYPE_U8: + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_U16: + if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_U32: + if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_STRING: + if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, + val.vstr)) + goto value_nest_cancel; + break; + case DEVLINK_PARAM_TYPE_BOOL: + if (val.vbool && + nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA)) + goto value_nest_cancel; + break; + } + + nla_nest_end(msg, param_value_attr); + return 0; + +value_nest_cancel: + nla_nest_cancel(msg, param_value_attr); +nla_put_failure: + return -EMSGSIZE; +} + +static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd, + u32 portid, u32 seq, int flags) +{ + union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1]; + bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {}; + const struct devlink_param *param = param_item->param; + struct devlink_param_gset_ctx ctx; + struct nlattr *param_values_list; + struct nlattr *param_attr; + int nla_type; + void *hdr; + int err; + int i; + + /* Get value from driver part to driverinit configuration mode */ + for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { + if (!devlink_param_cmode_is_supported(param, i)) + continue; + if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) { + if (param_item->driverinit_value_new_valid) + param_value[i] = param_item->driverinit_value_new; + else if (param_item->driverinit_value_valid) + param_value[i] = param_item->driverinit_value; + else + return -EOPNOTSUPP; + } else { + ctx.cmode = i; + err = devlink_param_get(devlink, param, &ctx); + if (err) + return err; + param_value[i] = ctx.val; + } + param_value_set[i] = true; + } + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto genlmsg_cancel; + + if (cmd == DEVLINK_CMD_PORT_PARAM_GET || + cmd == DEVLINK_CMD_PORT_PARAM_NEW || + cmd == DEVLINK_CMD_PORT_PARAM_DEL) + if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index)) + goto genlmsg_cancel; + + param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM); + if (!param_attr) + goto genlmsg_cancel; + if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name)) + goto param_nest_cancel; + if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC)) + goto param_nest_cancel; + + nla_type = devlink_param_type_to_nla_type(param->type); + if (nla_type < 0) + goto param_nest_cancel; + if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type)) + goto param_nest_cancel; + + param_values_list = nla_nest_start_noflag(msg, + DEVLINK_ATTR_PARAM_VALUES_LIST); + if (!param_values_list) + goto param_nest_cancel; + + for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) { + if (!param_value_set[i]) + continue; + err = devlink_nl_param_value_fill_one(msg, param->type, + i, param_value[i]); + if (err) + goto values_list_nest_cancel; + } + + nla_nest_end(msg, param_values_list); + nla_nest_end(msg, param_attr); + genlmsg_end(msg, hdr); + return 0; + +values_list_nest_cancel: + nla_nest_end(msg, param_values_list); +param_nest_cancel: + nla_nest_cancel(msg, param_attr); +genlmsg_cancel: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static void devlink_param_notify(struct devlink *devlink, + unsigned int port_index, + struct devlink_param_item *param_item, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL && + cmd != DEVLINK_CMD_PORT_PARAM_NEW && + cmd != DEVLINK_CMD_PORT_PARAM_DEL); + + /* devlink_notify_register() / devlink_notify_unregister() + * will replay the notifications if the params are added/removed + * outside of the lifetime of the instance. + */ + if (!devl_is_registered(devlink)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd, + 0, 0, 0); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int +devlink_nl_cmd_param_get_dump_one(struct sk_buff *msg, struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_param_item *param_item; + unsigned long param_id; + int err = 0; + + xa_for_each_start(&devlink->params, param_id, param_item, state->idx) { + err = devlink_nl_param_fill(msg, devlink, 0, param_item, + DEVLINK_CMD_PARAM_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err == -EOPNOTSUPP) { + err = 0; + } else if (err) { + state->idx = param_id; + break; + } + } + + return err; +} + +const struct devlink_cmd devl_cmd_param_get = { + .dump_one = devlink_nl_cmd_param_get_dump_one, +}; + +static int +devlink_param_type_get_from_info(struct genl_info *info, + enum devlink_param_type *param_type) +{ + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_TYPE)) + return -EINVAL; + + switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) { + case NLA_U8: + *param_type = DEVLINK_PARAM_TYPE_U8; + break; + case NLA_U16: + *param_type = DEVLINK_PARAM_TYPE_U16; + break; + case NLA_U32: + *param_type = DEVLINK_PARAM_TYPE_U32; + break; + case NLA_STRING: + *param_type = DEVLINK_PARAM_TYPE_STRING; + break; + case NLA_FLAG: + *param_type = DEVLINK_PARAM_TYPE_BOOL; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int +devlink_param_value_get_from_info(const struct devlink_param *param, + struct genl_info *info, + union devlink_param_value *value) +{ + struct nlattr *param_data; + int len; + + param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]; + + if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data) + return -EINVAL; + + switch (param->type) { + case DEVLINK_PARAM_TYPE_U8: + if (nla_len(param_data) != sizeof(u8)) + return -EINVAL; + value->vu8 = nla_get_u8(param_data); + break; + case DEVLINK_PARAM_TYPE_U16: + if (nla_len(param_data) != sizeof(u16)) + return -EINVAL; + value->vu16 = nla_get_u16(param_data); + break; + case DEVLINK_PARAM_TYPE_U32: + if (nla_len(param_data) != sizeof(u32)) + return -EINVAL; + value->vu32 = nla_get_u32(param_data); + break; + case DEVLINK_PARAM_TYPE_STRING: + len = strnlen(nla_data(param_data), nla_len(param_data)); + if (len == nla_len(param_data) || + len >= __DEVLINK_PARAM_MAX_STRING_VALUE) + return -EINVAL; + strcpy(value->vstr, nla_data(param_data)); + break; + case DEVLINK_PARAM_TYPE_BOOL: + if (param_data && nla_len(param_data)) + return -EINVAL; + value->vbool = nla_get_flag(param_data); + break; + } + return 0; +} + +static struct devlink_param_item * +devlink_param_get_from_info(struct xarray *params, struct genl_info *info) +{ + char *param_name; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_NAME)) + return NULL; + + param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]); + return devlink_param_find_by_name(params, param_name); +} + +static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_param_item *param_item; + struct sk_buff *msg; + int err; + + param_item = devlink_param_get_from_info(&devlink->params, info); + if (!param_item) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_param_fill(msg, devlink, 0, param_item, + DEVLINK_CMD_PARAM_GET, + info->snd_portid, info->snd_seq, 0); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink, + unsigned int port_index, + struct xarray *params, + struct genl_info *info, + enum devlink_command cmd) +{ + enum devlink_param_type param_type; + struct devlink_param_gset_ctx ctx; + enum devlink_param_cmode cmode; + struct devlink_param_item *param_item; + const struct devlink_param *param; + union devlink_param_value value; + int err = 0; + + param_item = devlink_param_get_from_info(params, info); + if (!param_item) + return -EINVAL; + param = param_item->param; + err = devlink_param_type_get_from_info(info, ¶m_type); + if (err) + return err; + if (param_type != param->type) + return -EINVAL; + err = devlink_param_value_get_from_info(param, info, &value); + if (err) + return err; + if (param->validate) { + err = param->validate(devlink, param->id, value, info->extack); + if (err) + return err; + } + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PARAM_VALUE_CMODE)) + return -EINVAL; + cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]); + if (!devlink_param_cmode_is_supported(param, cmode)) + return -EOPNOTSUPP; + + if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) { + param_item->driverinit_value_new = value; + param_item->driverinit_value_new_valid = true; + } else { + if (!param->set) + return -EOPNOTSUPP; + ctx.val = value; + ctx.cmode = cmode; + err = devlink_param_set(devlink, param, &ctx); + if (err) + return err; + } + + devlink_param_notify(devlink, port_index, param_item, cmd); + return 0; +} + +static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + + return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->params, + info, DEVLINK_CMD_PARAM_NEW); +} + +static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg, + struct netlink_callback *cb) +{ + NL_SET_ERR_MSG(cb->extack, "Port params are not supported"); + return msg->len; +} + +static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + NL_SET_ERR_MSG(info->extack, "Port params are not supported"); + return -EINVAL; +} + +static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + NL_SET_ERR_MSG(info->extack, "Port params are not supported"); + return -EINVAL; +} + +static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_snapshot *snapshot) +{ + struct nlattr *snap_attr; + int err; + + snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT); + if (!snap_attr) + return -EINVAL; + + err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id); + if (err) + goto nla_put_failure; + + nla_nest_end(msg, snap_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, snap_attr); + return err; +} + +static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg, + struct devlink *devlink, + struct devlink_region *region) +{ + struct devlink_snapshot *snapshot; + struct nlattr *snapshots_attr; + int err; + + snapshots_attr = nla_nest_start_noflag(msg, + DEVLINK_ATTR_REGION_SNAPSHOTS); + if (!snapshots_attr) + return -EINVAL; + + list_for_each_entry(snapshot, ®ion->snapshot_list, list) { + err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot); + if (err) + goto nla_put_failure; + } + + nla_nest_end(msg, snapshots_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, snapshots_attr); + return err; +} + +static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink, + enum devlink_command cmd, u32 portid, + u32 seq, int flags, + struct devlink_region *region) +{ + void *hdr; + int err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + err = devlink_nl_put_handle(msg, devlink); + if (err) + goto nla_put_failure; + + if (region->port) { + err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) + goto nla_put_failure; + } + + err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->name); + if (err) + goto nla_put_failure; + + err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE, + region->size, + DEVLINK_ATTR_PAD); + if (err) + goto nla_put_failure; + + err = nla_put_u32(msg, DEVLINK_ATTR_REGION_MAX_SNAPSHOTS, + region->max_snapshots); + if (err) + goto nla_put_failure; + + err = devlink_nl_region_snapshots_id_put(msg, devlink, region); + if (err) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return err; +} + +static struct sk_buff * +devlink_nl_region_notify_build(struct devlink_region *region, + struct devlink_snapshot *snapshot, + enum devlink_command cmd, u32 portid, u32 seq) +{ + struct devlink *devlink = region->devlink; + struct sk_buff *msg; + void *hdr; + int err; + + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return ERR_PTR(-ENOMEM); + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd); + if (!hdr) { + err = -EMSGSIZE; + goto out_free_msg; + } + + err = devlink_nl_put_handle(msg, devlink); + if (err) + goto out_cancel_msg; + + if (region->port) { + err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) + goto out_cancel_msg; + } + + err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, + region->ops->name); + if (err) + goto out_cancel_msg; + + if (snapshot) { + err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, + snapshot->id); + if (err) + goto out_cancel_msg; + } else { + err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE, + region->size, DEVLINK_ATTR_PAD); + if (err) + goto out_cancel_msg; + } + genlmsg_end(msg, hdr); + + return msg; + +out_cancel_msg: + genlmsg_cancel(msg, hdr); +out_free_msg: + nlmsg_free(msg); + return ERR_PTR(err); +} + +static void devlink_nl_region_notify(struct devlink_region *region, + struct devlink_snapshot *snapshot, + enum devlink_command cmd) +{ + struct devlink *devlink = region->devlink; + struct sk_buff *msg; + + WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0); + if (IS_ERR(msg)) + return; + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg, + 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +/** + * __devlink_snapshot_id_increment - Increment number of snapshots using an id + * @devlink: devlink instance + * @id: the snapshot id + * + * Track when a new snapshot begins using an id. Load the count for the + * given id from the snapshot xarray, increment it, and store it back. + * + * Called when a new snapshot is created with the given id. + * + * The id *must* have been previously allocated by + * devlink_region_snapshot_id_get(). + * + * Returns 0 on success, or an error on failure. + */ +static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id) +{ + unsigned long count; + void *p; + int err; + + xa_lock(&devlink->snapshot_ids); + p = xa_load(&devlink->snapshot_ids, id); + if (WARN_ON(!p)) { + err = -EINVAL; + goto unlock; + } + + if (WARN_ON(!xa_is_value(p))) { + err = -EINVAL; + goto unlock; + } + + count = xa_to_value(p); + count++; + + err = xa_err(__xa_store(&devlink->snapshot_ids, id, xa_mk_value(count), + GFP_ATOMIC)); +unlock: + xa_unlock(&devlink->snapshot_ids); + return err; +} + +/** + * __devlink_snapshot_id_decrement - Decrease number of snapshots using an id + * @devlink: devlink instance + * @id: the snapshot id + * + * Track when a snapshot is deleted and stops using an id. Load the count + * for the given id from the snapshot xarray, decrement it, and store it + * back. + * + * If the count reaches zero, erase this id from the xarray, freeing it + * up for future re-use by devlink_region_snapshot_id_get(). + * + * Called when a snapshot using the given id is deleted, and when the + * initial allocator of the id is finished using it. + */ +static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id) +{ + unsigned long count; + void *p; + + xa_lock(&devlink->snapshot_ids); + p = xa_load(&devlink->snapshot_ids, id); + if (WARN_ON(!p)) + goto unlock; + + if (WARN_ON(!xa_is_value(p))) + goto unlock; + + count = xa_to_value(p); + + if (count > 1) { + count--; + __xa_store(&devlink->snapshot_ids, id, xa_mk_value(count), + GFP_ATOMIC); + } else { + /* If this was the last user, we can erase this id */ + __xa_erase(&devlink->snapshot_ids, id); + } +unlock: + xa_unlock(&devlink->snapshot_ids); +} + +/** + * __devlink_snapshot_id_insert - Insert a specific snapshot ID + * @devlink: devlink instance + * @id: the snapshot id + * + * Mark the given snapshot id as used by inserting a zero value into the + * snapshot xarray. + * + * This must be called while holding the devlink instance lock. Unlike + * devlink_snapshot_id_get, the initial reference count is zero, not one. + * It is expected that the id will immediately be used before + * releasing the devlink instance lock. + * + * Returns zero on success, or an error code if the snapshot id could not + * be inserted. + */ +static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id) +{ + int err; + + xa_lock(&devlink->snapshot_ids); + if (xa_load(&devlink->snapshot_ids, id)) { + xa_unlock(&devlink->snapshot_ids); + return -EEXIST; + } + err = xa_err(__xa_store(&devlink->snapshot_ids, id, xa_mk_value(0), + GFP_ATOMIC)); + xa_unlock(&devlink->snapshot_ids); + return err; +} + +/** + * __devlink_region_snapshot_id_get - get snapshot ID + * @devlink: devlink instance + * @id: storage to return snapshot id + * + * Allocates a new snapshot id. Returns zero on success, or a negative + * error on failure. Must be called while holding the devlink instance + * lock. + * + * Snapshot IDs are tracked using an xarray which stores the number of + * users of the snapshot id. + * + * Note that the caller of this function counts as a 'user', in order to + * avoid race conditions. The caller must release its hold on the + * snapshot by using devlink_region_snapshot_id_put. + */ +static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id) +{ + return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1), + xa_limit_32b, GFP_KERNEL); +} + +/** + * __devlink_region_snapshot_create - create a new snapshot + * This will add a new snapshot of a region. The snapshot + * will be stored on the region struct and can be accessed + * from devlink. This is useful for future analyses of snapshots. + * Multiple snapshots can be created on a region. + * The @snapshot_id should be obtained using the getter function. + * + * Must be called only while holding the region snapshot lock. + * + * @region: devlink region of the snapshot + * @data: snapshot data + * @snapshot_id: snapshot id to be created + */ +static int +__devlink_region_snapshot_create(struct devlink_region *region, + u8 *data, u32 snapshot_id) +{ + struct devlink *devlink = region->devlink; + struct devlink_snapshot *snapshot; + int err; + + lockdep_assert_held(®ion->snapshot_lock); + + /* check if region can hold one more snapshot */ + if (region->cur_snapshots == region->max_snapshots) + return -ENOSPC; + + if (devlink_region_snapshot_get_by_id(region, snapshot_id)) + return -EEXIST; + + snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL); + if (!snapshot) + return -ENOMEM; + + err = __devlink_snapshot_id_increment(devlink, snapshot_id); + if (err) + goto err_snapshot_id_increment; + + snapshot->id = snapshot_id; + snapshot->region = region; + snapshot->data = data; + + list_add_tail(&snapshot->list, ®ion->snapshot_list); + + region->cur_snapshots++; + + devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW); + return 0; + +err_snapshot_id_increment: + kfree(snapshot); + return err; +} + +static void devlink_region_snapshot_del(struct devlink_region *region, + struct devlink_snapshot *snapshot) +{ + struct devlink *devlink = region->devlink; + + lockdep_assert_held(®ion->snapshot_lock); + + devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL); + region->cur_snapshots--; + list_del(&snapshot->list); + region->ops->destructor(snapshot->data); + __devlink_snapshot_id_decrement(devlink, snapshot->id); + kfree(snapshot); +} + +static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_port *port = NULL; + struct devlink_region *region; + const char *region_name; + struct sk_buff *msg; + unsigned int index; + int err; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_NAME)) + return -EINVAL; + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) + return -ENODEV; + } + + region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]); + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) + return -EINVAL; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET, + info->snd_portid, info->snd_seq, 0, + region); + if (err) { + nlmsg_free(msg); + return err; + } + + return genlmsg_reply(msg, info); +} + +static int devlink_nl_cmd_region_get_port_dumpit(struct sk_buff *msg, + struct netlink_callback *cb, + struct devlink_port *port, + int *idx, + int start) +{ + struct devlink_region *region; + int err = 0; + + list_for_each_entry(region, &port->region_list, list) { + if (*idx < start) { + (*idx)++; + continue; + } + err = devlink_nl_region_fill(msg, port->devlink, + DEVLINK_CMD_REGION_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, region); + if (err) + goto out; + (*idx)++; + } + +out: + return err; +} + +static int +devlink_nl_cmd_region_get_dump_one(struct sk_buff *msg, struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_region *region; + struct devlink_port *port; + unsigned long port_index; + int idx = 0; + int err; + + list_for_each_entry(region, &devlink->region_list, list) { + if (idx < state->idx) { + idx++; + continue; + } + err = devlink_nl_region_fill(msg, devlink, + DEVLINK_CMD_REGION_GET, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI, region); + if (err) { + state->idx = idx; + return err; + } + idx++; + } + + xa_for_each(&devlink->ports, port_index, port) { + err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, &idx, + state->idx); + if (err) { + state->idx = idx; + return err; + } + } + + return 0; +} + +const struct devlink_cmd devl_cmd_region_get = { + .dump_one = devlink_nl_cmd_region_get_dump_one, +}; + +static int devlink_nl_cmd_region_del(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_snapshot *snapshot; + struct devlink_port *port = NULL; + struct devlink_region *region; + const char *region_name; + unsigned int index; + u32 snapshot_id; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_NAME) || + GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_SNAPSHOT_ID)) + return -EINVAL; + + region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]); + snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]); + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) + return -ENODEV; + } + + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) + return -EINVAL; + + mutex_lock(®ion->snapshot_lock); + snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id); + if (!snapshot) { + mutex_unlock(®ion->snapshot_lock); + return -EINVAL; + } + + devlink_region_snapshot_del(region, snapshot); + mutex_unlock(®ion->snapshot_lock); + return 0; +} + +static int +devlink_nl_cmd_region_new(struct sk_buff *skb, struct genl_info *info) +{ + struct devlink *devlink = info->user_ptr[0]; + struct devlink_snapshot *snapshot; + struct devlink_port *port = NULL; + struct nlattr *snapshot_id_attr; + struct devlink_region *region; + const char *region_name; + unsigned int index; + u32 snapshot_id; + u8 *data; + int err; + + if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_REGION_NAME)) { + NL_SET_ERR_MSG(info->extack, "No region name provided"); + return -EINVAL; + } + + region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]); + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) + return -ENODEV; + } + + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) { + NL_SET_ERR_MSG(info->extack, "The requested region does not exist"); + return -EINVAL; + } + + if (!region->ops->snapshot) { + NL_SET_ERR_MSG(info->extack, "The requested region does not support taking an immediate snapshot"); + return -EOPNOTSUPP; + } + + mutex_lock(®ion->snapshot_lock); + + if (region->cur_snapshots == region->max_snapshots) { + NL_SET_ERR_MSG(info->extack, "The region has reached the maximum number of stored snapshots"); + err = -ENOSPC; + goto unlock; + } + + snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]; + if (snapshot_id_attr) { + snapshot_id = nla_get_u32(snapshot_id_attr); + + if (devlink_region_snapshot_get_by_id(region, snapshot_id)) { + NL_SET_ERR_MSG(info->extack, "The requested snapshot id is already in use"); + err = -EEXIST; + goto unlock; + } + + err = __devlink_snapshot_id_insert(devlink, snapshot_id); + if (err) + goto unlock; + } else { + err = __devlink_region_snapshot_id_get(devlink, &snapshot_id); + if (err) { + NL_SET_ERR_MSG(info->extack, "Failed to allocate a new snapshot id"); + goto unlock; + } + } + + if (port) + err = region->port_ops->snapshot(port, region->port_ops, + info->extack, &data); + else + err = region->ops->snapshot(devlink, region->ops, + info->extack, &data); + if (err) + goto err_snapshot_capture; + + err = __devlink_region_snapshot_create(region, data, snapshot_id); + if (err) + goto err_snapshot_create; + + if (!snapshot_id_attr) { + struct sk_buff *msg; + + snapshot = devlink_region_snapshot_get_by_id(region, + snapshot_id); + if (WARN_ON(!snapshot)) { + err = -EINVAL; + goto unlock; + } + + msg = devlink_nl_region_notify_build(region, snapshot, + DEVLINK_CMD_REGION_NEW, + info->snd_portid, + info->snd_seq); + err = PTR_ERR_OR_ZERO(msg); + if (err) + goto err_notify; + + err = genlmsg_reply(msg, info); + if (err) + goto err_notify; + } + + mutex_unlock(®ion->snapshot_lock); + return 0; + +err_snapshot_create: + region->ops->destructor(data); +err_snapshot_capture: + __devlink_snapshot_id_decrement(devlink, snapshot_id); + mutex_unlock(®ion->snapshot_lock); + return err; + +err_notify: + devlink_region_snapshot_del(region, snapshot); +unlock: + mutex_unlock(®ion->snapshot_lock); + return err; +} + +static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg, + u8 *chunk, u32 chunk_size, + u64 addr) +{ + struct nlattr *chunk_attr; + int err; + + chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK); + if (!chunk_attr) + return -EINVAL; + + err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk); + if (err) + goto nla_put_failure; + + err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr, + DEVLINK_ATTR_PAD); + if (err) + goto nla_put_failure; + + nla_nest_end(msg, chunk_attr); + return 0; + +nla_put_failure: + nla_nest_cancel(msg, chunk_attr); + return err; +} + +#define DEVLINK_REGION_READ_CHUNK_SIZE 256 + +typedef int devlink_chunk_fill_t(void *cb_priv, u8 *chunk, u32 chunk_size, + u64 curr_offset, + struct netlink_ext_ack *extack); + +static int +devlink_nl_region_read_fill(struct sk_buff *skb, devlink_chunk_fill_t *cb, + void *cb_priv, u64 start_offset, u64 end_offset, + u64 *new_offset, struct netlink_ext_ack *extack) +{ + u64 curr_offset = start_offset; + int err = 0; + u8 *data; + + /* Allocate and re-use a single buffer */ + data = kmalloc(DEVLINK_REGION_READ_CHUNK_SIZE, GFP_KERNEL); + if (!data) + return -ENOMEM; + + *new_offset = start_offset; + + while (curr_offset < end_offset) { + u32 data_size; + + data_size = min_t(u32, end_offset - curr_offset, + DEVLINK_REGION_READ_CHUNK_SIZE); + + err = cb(cb_priv, data, data_size, curr_offset, extack); + if (err) + break; + + err = devlink_nl_cmd_region_read_chunk_fill(skb, data, data_size, curr_offset); + if (err) + break; + + curr_offset += data_size; + } + *new_offset = curr_offset; + + kfree(data); + + return err; +} + +static int +devlink_region_snapshot_fill(void *cb_priv, u8 *chunk, u32 chunk_size, + u64 curr_offset, + struct netlink_ext_ack __always_unused *extack) +{ + struct devlink_snapshot *snapshot = cb_priv; + + memcpy(chunk, &snapshot->data[curr_offset], chunk_size); + + return 0; +} + +static int +devlink_region_port_direct_fill(void *cb_priv, u8 *chunk, u32 chunk_size, + u64 curr_offset, struct netlink_ext_ack *extack) +{ + struct devlink_region *region = cb_priv; + + return region->port_ops->read(region->port, region->port_ops, extack, + curr_offset, chunk_size, chunk); +} + +static int +devlink_region_direct_fill(void *cb_priv, u8 *chunk, u32 chunk_size, + u64 curr_offset, struct netlink_ext_ack *extack) +{ + struct devlink_region *region = cb_priv; + + return region->ops->read(region->devlink, region->ops, extack, + curr_offset, chunk_size, chunk); +} + +static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, + struct netlink_callback *cb) +{ + const struct genl_dumpit_info *info = genl_dumpit_info(cb); + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct nlattr *chunks_attr, *region_attr, *snapshot_attr; + u64 ret_offset, start_offset, end_offset = U64_MAX; + struct nlattr **attrs = info->attrs; + struct devlink_port *port = NULL; + devlink_chunk_fill_t *region_cb; + struct devlink_region *region; + const char *region_name; + struct devlink *devlink; + unsigned int index; + void *region_cb_priv; + void *hdr; + int err; + + start_offset = state->start_offset; + + devlink = devlink_get_from_attrs_lock(sock_net(cb->skb->sk), attrs); + if (IS_ERR(devlink)) + return PTR_ERR(devlink); + + if (!attrs[DEVLINK_ATTR_REGION_NAME]) { + NL_SET_ERR_MSG(cb->extack, "No region name provided"); + err = -EINVAL; + goto out_unlock; + } + + if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { + index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); + + port = devlink_port_get_by_index(devlink, index); + if (!port) { + err = -ENODEV; + goto out_unlock; + } + } + + region_attr = attrs[DEVLINK_ATTR_REGION_NAME]; + region_name = nla_data(region_attr); + + if (port) + region = devlink_port_region_get_by_name(port, region_name); + else + region = devlink_region_get_by_name(devlink, region_name); + + if (!region) { + NL_SET_ERR_MSG_ATTR(cb->extack, region_attr, "Requested region does not exist"); + err = -EINVAL; + goto out_unlock; + } + + snapshot_attr = attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]; + if (!snapshot_attr) { + if (!nla_get_flag(attrs[DEVLINK_ATTR_REGION_DIRECT])) { + NL_SET_ERR_MSG(cb->extack, "No snapshot id provided"); + err = -EINVAL; + goto out_unlock; + } + + if (!region->ops->read) { + NL_SET_ERR_MSG(cb->extack, "Requested region does not support direct read"); + err = -EOPNOTSUPP; + goto out_unlock; + } + + if (port) + region_cb = &devlink_region_port_direct_fill; + else + region_cb = &devlink_region_direct_fill; + region_cb_priv = region; + } else { + struct devlink_snapshot *snapshot; + u32 snapshot_id; + + if (nla_get_flag(attrs[DEVLINK_ATTR_REGION_DIRECT])) { + NL_SET_ERR_MSG_ATTR(cb->extack, snapshot_attr, "Direct region read does not use snapshot"); + err = -EINVAL; + goto out_unlock; + } + + snapshot_id = nla_get_u32(snapshot_attr); + snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id); + if (!snapshot) { + NL_SET_ERR_MSG_ATTR(cb->extack, snapshot_attr, "Requested snapshot does not exist"); + err = -EINVAL; + goto out_unlock; + } + region_cb = &devlink_region_snapshot_fill; + region_cb_priv = snapshot; + } + + if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] && + attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) { + if (!start_offset) + start_offset = + nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]); + + end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]); + end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]); + } + + if (end_offset > region->size) + end_offset = region->size; + + /* return 0 if there is no further data to read */ + if (start_offset == end_offset) { + err = 0; + goto out_unlock; + } + + hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, + &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, + DEVLINK_CMD_REGION_READ); + if (!hdr) { + err = -EMSGSIZE; + goto out_unlock; + } + + err = devlink_nl_put_handle(skb, devlink); + if (err) + goto nla_put_failure; + + if (region->port) { + err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX, + region->port->index); + if (err) + goto nla_put_failure; + } + + err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name); + if (err) + goto nla_put_failure; + + chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS); + if (!chunks_attr) { + err = -EMSGSIZE; + goto nla_put_failure; + } + + err = devlink_nl_region_read_fill(skb, region_cb, region_cb_priv, + start_offset, end_offset, &ret_offset, + cb->extack); + + if (err && err != -EMSGSIZE) + goto nla_put_failure; + + /* Check if there was any progress done to prevent infinite loop */ + if (ret_offset == start_offset) { + err = -EINVAL; + goto nla_put_failure; + } + + state->start_offset = ret_offset; + + nla_nest_end(skb, chunks_attr); + genlmsg_end(skb, hdr); + devl_unlock(devlink); + devlink_put(devlink); + return skb->len; + +nla_put_failure: + genlmsg_cancel(skb, hdr); +out_unlock: + devl_unlock(devlink); + devlink_put(devlink); + return err; +} + +struct devlink_stats { + u64_stats_t rx_bytes; + u64_stats_t rx_packets; + struct u64_stats_sync syncp; +}; + +/** + * struct devlink_trap_policer_item - Packet trap policer attributes. + * @policer: Immutable packet trap policer attributes. + * @rate: Rate in packets / sec. + * @burst: Burst size in packets. + * @list: trap_policer_list member. + * + * Describes packet trap policer attributes. Created by devlink during trap + * policer registration. + */ +struct devlink_trap_policer_item { + const struct devlink_trap_policer *policer; + u64 rate; + u64 burst; + struct list_head list; +}; + +/** + * struct devlink_trap_group_item - Packet trap group attributes. + * @group: Immutable packet trap group attributes. + * @policer_item: Associated policer item. Can be NULL. + * @list: trap_group_list member. + * @stats: Trap group statistics. + * + * Describes packet trap group attributes. Created by devlink during trap + * group registration. + */ +struct devlink_trap_group_item { + const struct devlink_trap_group *group; + struct devlink_trap_policer_item *policer_item; + struct list_head list; + struct devlink_stats __percpu *stats; +}; + +/** + * struct devlink_trap_item - Packet trap attributes. + * @trap: Immutable packet trap attributes. + * @group_item: Associated group item. + * @list: trap_list member. + * @action: Trap action. + * @stats: Trap statistics. + * @priv: Driver private information. + * + * Describes both mutable and immutable packet trap attributes. Created by + * devlink during trap registration and used for all trap related operations. + */ +struct devlink_trap_item { + const struct devlink_trap *trap; + struct devlink_trap_group_item *group_item; + struct list_head list; + enum devlink_trap_action action; + struct devlink_stats __percpu *stats; + void *priv; +}; + +static struct devlink_trap_policer_item * +devlink_trap_policer_item_lookup(struct devlink *devlink, u32 id) +{ + struct devlink_trap_policer_item *policer_item; + + list_for_each_entry(policer_item, &devlink->trap_policer_list, list) { + if (policer_item->policer->id == id) + return policer_item; + } + + return NULL; +} + +static struct devlink_trap_item * +devlink_trap_item_lookup(struct devlink *devlink, const char *name) +{ + struct devlink_trap_item *trap_item; + + list_for_each_entry(trap_item, &devlink->trap_list, list) { + if (!strcmp(trap_item->trap->name, name)) + return trap_item; + } + + return NULL; +} + +static struct devlink_trap_item * +devlink_trap_item_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + struct nlattr *attr; + + if (!info->attrs[DEVLINK_ATTR_TRAP_NAME]) + return NULL; + attr = info->attrs[DEVLINK_ATTR_TRAP_NAME]; + + return devlink_trap_item_lookup(devlink, nla_data(attr)); +} + +static int +devlink_trap_action_get_from_info(struct genl_info *info, + enum devlink_trap_action *p_trap_action) +{ + u8 val; + + val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]); + switch (val) { + case DEVLINK_TRAP_ACTION_DROP: + case DEVLINK_TRAP_ACTION_TRAP: + case DEVLINK_TRAP_ACTION_MIRROR: + *p_trap_action = val; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int devlink_trap_metadata_put(struct sk_buff *msg, + const struct devlink_trap *trap) +{ + struct nlattr *attr; + + attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA); + if (!attr) + return -EMSGSIZE; + + if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) && + nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT)) + goto nla_put_failure; + if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_FA_COOKIE) && + nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_FA_COOKIE)) + goto nla_put_failure; + + nla_nest_end(msg, attr); + + return 0; + +nla_put_failure: + nla_nest_cancel(msg, attr); + return -EMSGSIZE; +} + +static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats, + struct devlink_stats *stats) +{ + int i; + + memset(stats, 0, sizeof(*stats)); + for_each_possible_cpu(i) { + struct devlink_stats *cpu_stats; + u64 rx_packets, rx_bytes; + unsigned int start; + + cpu_stats = per_cpu_ptr(trap_stats, i); + do { + start = u64_stats_fetch_begin(&cpu_stats->syncp); + rx_packets = u64_stats_read(&cpu_stats->rx_packets); + rx_bytes = u64_stats_read(&cpu_stats->rx_bytes); + } while (u64_stats_fetch_retry(&cpu_stats->syncp, start)); + + u64_stats_add(&stats->rx_packets, rx_packets); + u64_stats_add(&stats->rx_bytes, rx_bytes); + } +} + +static int +devlink_trap_group_stats_put(struct sk_buff *msg, + struct devlink_stats __percpu *trap_stats) +{ + struct devlink_stats stats; + struct nlattr *attr; + + devlink_trap_stats_read(trap_stats, &stats); + + attr = nla_nest_start(msg, DEVLINK_ATTR_STATS); + if (!attr) + return -EMSGSIZE; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS, + u64_stats_read(&stats.rx_packets), + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES, + u64_stats_read(&stats.rx_bytes), + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + nla_nest_end(msg, attr); + + return 0; + +nla_put_failure: + nla_nest_cancel(msg, attr); + return -EMSGSIZE; +} + +static int devlink_trap_stats_put(struct sk_buff *msg, struct devlink *devlink, + const struct devlink_trap_item *trap_item) +{ + struct devlink_stats stats; + struct nlattr *attr; + u64 drops = 0; + int err; + + if (devlink->ops->trap_drop_counter_get) { + err = devlink->ops->trap_drop_counter_get(devlink, + trap_item->trap, + &drops); + if (err) + return err; + } + + devlink_trap_stats_read(trap_item->stats, &stats); + + attr = nla_nest_start(msg, DEVLINK_ATTR_STATS); + if (!attr) + return -EMSGSIZE; + + if (devlink->ops->trap_drop_counter_get && + nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS, + u64_stats_read(&stats.rx_packets), + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES, + u64_stats_read(&stats.rx_bytes), + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + nla_nest_end(msg, attr); + + return 0; + +nla_put_failure: + nla_nest_cancel(msg, attr); + return -EMSGSIZE; +} + +static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink, + const struct devlink_trap_item *trap_item, + enum devlink_command cmd, u32 portid, u32 seq, + int flags) +{ + struct devlink_trap_group_item *group_item = trap_item->group_item; + void *hdr; + int err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME, + group_item->group->name)) + goto nla_put_failure; + + if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name)) + goto nla_put_failure; + + if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type)) + goto nla_put_failure; + + if (trap_item->trap->generic && + nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC)) + goto nla_put_failure; + + if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action)) + goto nla_put_failure; + + err = devlink_trap_metadata_put(msg, trap_item->trap); + if (err) + goto nla_put_failure; + + err = devlink_trap_stats_put(msg, devlink, trap_item); + if (err) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + struct devlink_trap_item *trap_item; + struct sk_buff *msg; + int err; + + if (list_empty(&devlink->trap_list)) + return -EOPNOTSUPP; + + trap_item = devlink_trap_item_get_from_info(devlink, info); + if (!trap_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap"); + return -ENOENT; + } + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_trap_fill(msg, devlink, trap_item, + DEVLINK_CMD_TRAP_NEW, info->snd_portid, + info->snd_seq, 0); + if (err) + goto err_trap_fill; + + return genlmsg_reply(msg, info); + +err_trap_fill: + nlmsg_free(msg); + return err; +} + +static int +devlink_nl_cmd_trap_get_dump_one(struct sk_buff *msg, struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_trap_item *trap_item; + int idx = 0; + int err = 0; + + list_for_each_entry(trap_item, &devlink->trap_list, list) { + if (idx < state->idx) { + idx++; + continue; + } + err = devlink_nl_trap_fill(msg, devlink, trap_item, + DEVLINK_CMD_TRAP_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + state->idx = idx; + break; + } + idx++; + } + + return err; +} + +const struct devlink_cmd devl_cmd_trap_get = { + .dump_one = devlink_nl_cmd_trap_get_dump_one, +}; + +static int __devlink_trap_action_set(struct devlink *devlink, + struct devlink_trap_item *trap_item, + enum devlink_trap_action trap_action, + struct netlink_ext_ack *extack) +{ + int err; + + if (trap_item->action != trap_action && + trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) { + NL_SET_ERR_MSG(extack, "Cannot change action of non-drop traps. Skipping"); + return 0; + } + + err = devlink->ops->trap_action_set(devlink, trap_item->trap, + trap_action, extack); + if (err) + return err; + + trap_item->action = trap_action; + + return 0; +} + +static int devlink_trap_action_set(struct devlink *devlink, + struct devlink_trap_item *trap_item, + struct genl_info *info) +{ + enum devlink_trap_action trap_action; + int err; + + if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION]) + return 0; + + err = devlink_trap_action_get_from_info(info, &trap_action); + if (err) { + NL_SET_ERR_MSG(info->extack, "Invalid trap action"); + return -EINVAL; + } + + return __devlink_trap_action_set(devlink, trap_item, trap_action, + info->extack); +} + +static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + struct devlink_trap_item *trap_item; + + if (list_empty(&devlink->trap_list)) + return -EOPNOTSUPP; + + trap_item = devlink_trap_item_get_from_info(devlink, info); + if (!trap_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap"); + return -ENOENT; + } + + return devlink_trap_action_set(devlink, trap_item, info); +} + +static struct devlink_trap_group_item * +devlink_trap_group_item_lookup(struct devlink *devlink, const char *name) +{ + struct devlink_trap_group_item *group_item; + + list_for_each_entry(group_item, &devlink->trap_group_list, list) { + if (!strcmp(group_item->group->name, name)) + return group_item; + } + + return NULL; +} + +static struct devlink_trap_group_item * +devlink_trap_group_item_lookup_by_id(struct devlink *devlink, u16 id) +{ + struct devlink_trap_group_item *group_item; + + list_for_each_entry(group_item, &devlink->trap_group_list, list) { + if (group_item->group->id == id) + return group_item; + } + + return NULL; +} + +static struct devlink_trap_group_item * +devlink_trap_group_item_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + char *name; + + if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]) + return NULL; + name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]); + + return devlink_trap_group_item_lookup(devlink, name); +} + +static int +devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink, + const struct devlink_trap_group_item *group_item, + enum devlink_command cmd, u32 portid, u32 seq, + int flags) +{ + void *hdr; + int err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME, + group_item->group->name)) + goto nla_put_failure; + + if (group_item->group->generic && + nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC)) + goto nla_put_failure; + + if (group_item->policer_item && + nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID, + group_item->policer_item->policer->id)) + goto nla_put_failure; + + err = devlink_trap_group_stats_put(msg, group_item->stats); + if (err) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + struct devlink_trap_group_item *group_item; + struct sk_buff *msg; + int err; + + if (list_empty(&devlink->trap_group_list)) + return -EOPNOTSUPP; + + group_item = devlink_trap_group_item_get_from_info(devlink, info); + if (!group_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap group"); + return -ENOENT; + } + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_trap_group_fill(msg, devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) + goto err_trap_group_fill; + + return genlmsg_reply(msg, info); + +err_trap_group_fill: + nlmsg_free(msg); + return err; +} + +static int +devlink_nl_cmd_trap_group_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_trap_group_item *group_item; + int idx = 0; + int err = 0; + + + list_for_each_entry(group_item, &devlink->trap_group_list, list) { + if (idx < state->idx) { + idx++; + continue; + } + err = devlink_nl_trap_group_fill(msg, devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + state->idx = idx; + break; + } + idx++; + } + + return err; +} + +const struct devlink_cmd devl_cmd_trap_group_get = { + .dump_one = devlink_nl_cmd_trap_group_get_dump_one, +}; + +static int +__devlink_trap_group_action_set(struct devlink *devlink, + struct devlink_trap_group_item *group_item, + enum devlink_trap_action trap_action, + struct netlink_ext_ack *extack) +{ + const char *group_name = group_item->group->name; + struct devlink_trap_item *trap_item; + int err; + + if (devlink->ops->trap_group_action_set) { + err = devlink->ops->trap_group_action_set(devlink, group_item->group, + trap_action, extack); + if (err) + return err; + + list_for_each_entry(trap_item, &devlink->trap_list, list) { + if (strcmp(trap_item->group_item->group->name, group_name)) + continue; + if (trap_item->action != trap_action && + trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) + continue; + trap_item->action = trap_action; + } + + return 0; + } + + list_for_each_entry(trap_item, &devlink->trap_list, list) { + if (strcmp(trap_item->group_item->group->name, group_name)) + continue; + err = __devlink_trap_action_set(devlink, trap_item, + trap_action, extack); + if (err) + return err; + } + + return 0; +} + +static int +devlink_trap_group_action_set(struct devlink *devlink, + struct devlink_trap_group_item *group_item, + struct genl_info *info, bool *p_modified) +{ + enum devlink_trap_action trap_action; + int err; + + if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION]) + return 0; + + err = devlink_trap_action_get_from_info(info, &trap_action); + if (err) { + NL_SET_ERR_MSG(info->extack, "Invalid trap action"); + return -EINVAL; + } + + err = __devlink_trap_group_action_set(devlink, group_item, trap_action, + info->extack); + if (err) + return err; + + *p_modified = true; + + return 0; +} + +static int devlink_trap_group_set(struct devlink *devlink, + struct devlink_trap_group_item *group_item, + struct genl_info *info) +{ + struct devlink_trap_policer_item *policer_item; + struct netlink_ext_ack *extack = info->extack; + const struct devlink_trap_policer *policer; + struct nlattr **attrs = info->attrs; + u32 policer_id; + int err; + + if (!attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) + return 0; + + if (!devlink->ops->trap_group_set) + return -EOPNOTSUPP; + + policer_id = nla_get_u32(attrs[DEVLINK_ATTR_TRAP_POLICER_ID]); + policer_item = devlink_trap_policer_item_lookup(devlink, policer_id); + if (policer_id && !policer_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap policer"); + return -ENOENT; + } + policer = policer_item ? policer_item->policer : NULL; + + err = devlink->ops->trap_group_set(devlink, group_item->group, policer, + extack); + if (err) + return err; + + group_item->policer_item = policer_item; + + return 0; +} + +static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + struct devlink_trap_group_item *group_item; + bool modified = false; + int err; + + if (list_empty(&devlink->trap_group_list)) + return -EOPNOTSUPP; + + group_item = devlink_trap_group_item_get_from_info(devlink, info); + if (!group_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap group"); + return -ENOENT; + } + + err = devlink_trap_group_action_set(devlink, group_item, info, + &modified); + if (err) + return err; + + err = devlink_trap_group_set(devlink, group_item, info); + if (err) + goto err_trap_group_set; + + return 0; + +err_trap_group_set: + if (modified) + NL_SET_ERR_MSG(extack, "Trap group set failed, but some changes were committed already"); + return err; +} + +static struct devlink_trap_policer_item * +devlink_trap_policer_item_get_from_info(struct devlink *devlink, + struct genl_info *info) +{ + u32 id; + + if (!info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]) + return NULL; + id = nla_get_u32(info->attrs[DEVLINK_ATTR_TRAP_POLICER_ID]); + + return devlink_trap_policer_item_lookup(devlink, id); +} + +static int +devlink_trap_policer_stats_put(struct sk_buff *msg, struct devlink *devlink, + const struct devlink_trap_policer *policer) +{ + struct nlattr *attr; + u64 drops; + int err; + + if (!devlink->ops->trap_policer_counter_get) + return 0; + + err = devlink->ops->trap_policer_counter_get(devlink, policer, &drops); + if (err) + return err; + + attr = nla_nest_start(msg, DEVLINK_ATTR_STATS); + if (!attr) + return -EMSGSIZE; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_DROPPED, drops, + DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + nla_nest_end(msg, attr); + + return 0; + +nla_put_failure: + nla_nest_cancel(msg, attr); + return -EMSGSIZE; +} + +static int +devlink_nl_trap_policer_fill(struct sk_buff *msg, struct devlink *devlink, + const struct devlink_trap_policer_item *policer_item, + enum devlink_command cmd, u32 portid, u32 seq, + int flags) +{ + void *hdr; + int err; + + hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); + if (!hdr) + return -EMSGSIZE; + + if (devlink_nl_put_handle(msg, devlink)) + goto nla_put_failure; + + if (nla_put_u32(msg, DEVLINK_ATTR_TRAP_POLICER_ID, + policer_item->policer->id)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_RATE, + policer_item->rate, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + if (nla_put_u64_64bit(msg, DEVLINK_ATTR_TRAP_POLICER_BURST, + policer_item->burst, DEVLINK_ATTR_PAD)) + goto nla_put_failure; + + err = devlink_trap_policer_stats_put(msg, devlink, + policer_item->policer); + if (err) + goto nla_put_failure; + + genlmsg_end(msg, hdr); + + return 0; + +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int devlink_nl_cmd_trap_policer_get_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_trap_policer_item *policer_item; + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + struct sk_buff *msg; + int err; + + if (list_empty(&devlink->trap_policer_list)) + return -EOPNOTSUPP; + + policer_item = devlink_trap_policer_item_get_from_info(devlink, info); + if (!policer_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap policer"); + return -ENOENT; + } + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_NEW, + info->snd_portid, info->snd_seq, 0); + if (err) + goto err_trap_policer_fill; + + return genlmsg_reply(msg, info); + +err_trap_policer_fill: + nlmsg_free(msg); + return err; +} + +static int +devlink_nl_cmd_trap_policer_get_dump_one(struct sk_buff *msg, + struct devlink *devlink, + struct netlink_callback *cb) +{ + struct devlink_nl_dump_state *state = devlink_dump_state(cb); + struct devlink_trap_policer_item *policer_item; + int idx = 0; + int err = 0; + + list_for_each_entry(policer_item, &devlink->trap_policer_list, list) { + if (idx < state->idx) { + idx++; + continue; + } + err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_NEW, + NETLINK_CB(cb->skb).portid, + cb->nlh->nlmsg_seq, + NLM_F_MULTI); + if (err) { + state->idx = idx; + break; + } + idx++; + } + + return err; +} + +const struct devlink_cmd devl_cmd_trap_policer_get = { + .dump_one = devlink_nl_cmd_trap_policer_get_dump_one, +}; + +static int +devlink_trap_policer_set(struct devlink *devlink, + struct devlink_trap_policer_item *policer_item, + struct genl_info *info) +{ + struct netlink_ext_ack *extack = info->extack; + struct nlattr **attrs = info->attrs; + u64 rate, burst; + int err; + + rate = policer_item->rate; + burst = policer_item->burst; + + if (attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]) + rate = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_RATE]); + + if (attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]) + burst = nla_get_u64(attrs[DEVLINK_ATTR_TRAP_POLICER_BURST]); + + if (rate < policer_item->policer->min_rate) { + NL_SET_ERR_MSG(extack, "Policer rate lower than limit"); + return -EINVAL; + } + + if (rate > policer_item->policer->max_rate) { + NL_SET_ERR_MSG(extack, "Policer rate higher than limit"); + return -EINVAL; + } + + if (burst < policer_item->policer->min_burst) { + NL_SET_ERR_MSG(extack, "Policer burst size lower than limit"); + return -EINVAL; + } + + if (burst > policer_item->policer->max_burst) { + NL_SET_ERR_MSG(extack, "Policer burst size higher than limit"); + return -EINVAL; + } + + err = devlink->ops->trap_policer_set(devlink, policer_item->policer, + rate, burst, info->extack); + if (err) + return err; + + policer_item->rate = rate; + policer_item->burst = burst; + + return 0; +} + +static int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb, + struct genl_info *info) +{ + struct devlink_trap_policer_item *policer_item; + struct netlink_ext_ack *extack = info->extack; + struct devlink *devlink = info->user_ptr[0]; + + if (list_empty(&devlink->trap_policer_list)) + return -EOPNOTSUPP; + + if (!devlink->ops->trap_policer_set) + return -EOPNOTSUPP; + + policer_item = devlink_trap_policer_item_get_from_info(devlink, info); + if (!policer_item) { + NL_SET_ERR_MSG(extack, "Device did not register this trap policer"); + return -ENOENT; + } + + return devlink_trap_policer_set(devlink, policer_item, info); +} + +const struct genl_small_ops devlink_nl_ops[56] = { + { + .cmd = DEVLINK_CMD_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PORT_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PORT_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_RATE_GET, + .doit = devlink_nl_cmd_rate_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_RATE, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_RATE_SET, + .doit = devlink_nl_cmd_rate_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_RATE, + }, + { + .cmd = DEVLINK_CMD_RATE_NEW, + .doit = devlink_nl_cmd_rate_new_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_RATE_DEL, + .doit = devlink_nl_cmd_rate_del_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_RATE_NODE, + }, + { + .cmd = DEVLINK_CMD_PORT_SPLIT, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_split_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_PORT_UNSPLIT, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_unsplit_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_PORT_NEW, + .doit = devlink_nl_cmd_port_new_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_PORT_DEL, + .doit = devlink_nl_cmd_port_del_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_LINECARD_GET, + .doit = devlink_nl_cmd_linecard_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_LINECARD_SET, + .doit = devlink_nl_cmd_linecard_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD, + }, + { + .cmd = DEVLINK_CMD_SB_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_POOL_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_pool_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_POOL_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_pool_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_SB_PORT_POOL_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_port_pool_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_PORT_POOL_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_port_pool_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_occ_snapshot_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_sb_occ_max_clear_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_ESWITCH_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_eswitch_get_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_ESWITCH_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_eswitch_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_DPIPE_TABLE_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_table_get, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_entries_get, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_DPIPE_HEADERS_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_headers_get, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_dpipe_table_counters_set, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_RESOURCE_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_resource_set, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_RESOURCE_DUMP, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_resource_dump, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_RELOAD, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_reload, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_PARAM_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_param_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PARAM_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_param_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_PORT_PARAM_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_param_get_doit, + .dumpit = devlink_nl_cmd_port_param_get_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_PORT_PARAM_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_port_param_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_PORT, + }, + { + .cmd = DEVLINK_CMD_REGION_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_region_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_REGION_NEW, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_region_new, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_REGION_DEL, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_region_del, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_REGION_READ, + .validate = GENL_DONT_VALIDATE_STRICT | + GENL_DONT_VALIDATE_DUMP_STRICT, + .dumpit = devlink_nl_cmd_region_read_dumpit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_INFO_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_info_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_GET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_SET, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_set_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_recover_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_diagnose_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET, + .validate = GENL_DONT_VALIDATE_STRICT | + GENL_DONT_VALIDATE_DUMP_STRICT, + .dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_dump_clear_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT, + }, + { + .cmd = DEVLINK_CMD_HEALTH_REPORTER_TEST, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_health_reporter_test_doit, + .flags = GENL_ADMIN_PERM, + .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT, + }, + { + .cmd = DEVLINK_CMD_FLASH_UPDATE, + .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, + .doit = devlink_nl_cmd_flash_update, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_TRAP_GET, + .doit = devlink_nl_cmd_trap_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_TRAP_SET, + .doit = devlink_nl_cmd_trap_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_TRAP_GROUP_GET, + .doit = devlink_nl_cmd_trap_group_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_TRAP_GROUP_SET, + .doit = devlink_nl_cmd_trap_group_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_TRAP_POLICER_GET, + .doit = devlink_nl_cmd_trap_policer_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_TRAP_POLICER_SET, + .doit = devlink_nl_cmd_trap_policer_set_doit, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = DEVLINK_CMD_SELFTESTS_GET, + .doit = devlink_nl_cmd_selftests_get_doit, + .dumpit = devlink_nl_instance_iter_dumpit, + /* can be retrieved by unprivileged users */ + }, + { + .cmd = DEVLINK_CMD_SELFTESTS_RUN, + .doit = devlink_nl_cmd_selftests_run, + .flags = GENL_ADMIN_PERM, + }, + /* -- No new ops here! Use split ops going forward! -- */ +}; + +static void +devlink_trap_policer_notify(struct devlink *devlink, + const struct devlink_trap_policer_item *policer_item, + enum devlink_command cmd); +static void +devlink_trap_group_notify(struct devlink *devlink, + const struct devlink_trap_group_item *group_item, + enum devlink_command cmd); +static void devlink_trap_notify(struct devlink *devlink, + const struct devlink_trap_item *trap_item, + enum devlink_command cmd); + +void devlink_notify_register(struct devlink *devlink) +{ + struct devlink_trap_policer_item *policer_item; + struct devlink_trap_group_item *group_item; + struct devlink_param_item *param_item; + struct devlink_trap_item *trap_item; + struct devlink_port *devlink_port; + struct devlink_linecard *linecard; + struct devlink_rate *rate_node; + struct devlink_region *region; + unsigned long port_index; + unsigned long param_id; + + devlink_notify(devlink, DEVLINK_CMD_NEW); + list_for_each_entry(linecard, &devlink->linecard_list, list) + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + + xa_for_each(&devlink->ports, port_index, devlink_port) + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); + + list_for_each_entry(policer_item, &devlink->trap_policer_list, list) + devlink_trap_policer_notify(devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_NEW); + + list_for_each_entry(group_item, &devlink->trap_group_list, list) + devlink_trap_group_notify(devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_NEW); + + list_for_each_entry(trap_item, &devlink->trap_list, list) + devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW); + + list_for_each_entry(rate_node, &devlink->rate_list, list) + devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW); + + list_for_each_entry(region, &devlink->region_list, list) + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW); + + xa_for_each(&devlink->params, param_id, param_item) + devlink_param_notify(devlink, 0, param_item, + DEVLINK_CMD_PARAM_NEW); +} + +void devlink_notify_unregister(struct devlink *devlink) +{ + struct devlink_trap_policer_item *policer_item; + struct devlink_trap_group_item *group_item; + struct devlink_param_item *param_item; + struct devlink_trap_item *trap_item; + struct devlink_port *devlink_port; + struct devlink_rate *rate_node; + struct devlink_region *region; + unsigned long port_index; + unsigned long param_id; + + xa_for_each(&devlink->params, param_id, param_item) + devlink_param_notify(devlink, 0, param_item, + DEVLINK_CMD_PARAM_DEL); + + list_for_each_entry_reverse(region, &devlink->region_list, list) + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL); + + list_for_each_entry_reverse(rate_node, &devlink->rate_list, list) + devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_DEL); + + list_for_each_entry_reverse(trap_item, &devlink->trap_list, list) + devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL); + + list_for_each_entry_reverse(group_item, &devlink->trap_group_list, list) + devlink_trap_group_notify(devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_DEL); + list_for_each_entry_reverse(policer_item, &devlink->trap_policer_list, + list) + devlink_trap_policer_notify(devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_DEL); + + xa_for_each(&devlink->ports, port_index, devlink_port) + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); + devlink_notify(devlink, DEVLINK_CMD_DEL); +} + +static void devlink_port_type_warn(struct work_struct *work) +{ + WARN(true, "Type was not set for devlink port."); +} + +static bool devlink_port_type_should_warn(struct devlink_port *devlink_port) +{ + /* Ignore CPU and DSA flavours. */ + return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && + devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && + devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED; +} + +#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600) + +static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port) +{ + if (!devlink_port_type_should_warn(devlink_port)) + return; + /* Schedule a work to WARN in case driver does not set port + * type within timeout. + */ + schedule_delayed_work(&devlink_port->type_warn_dw, + DEVLINK_PORT_TYPE_WARN_TIMEOUT); +} + +static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port) +{ + if (!devlink_port_type_should_warn(devlink_port)) + return; + cancel_delayed_work_sync(&devlink_port->type_warn_dw); +} + +/** + * devlink_port_init() - Init devlink port + * + * @devlink: devlink + * @devlink_port: devlink port + * + * Initialize essencial stuff that is needed for functions + * that may be called before devlink port registration. + * Call to this function is optional and not needed + * in case the driver does not use such functions. + */ +void devlink_port_init(struct devlink *devlink, + struct devlink_port *devlink_port) +{ + if (devlink_port->initialized) + return; + devlink_port->devlink = devlink; + INIT_LIST_HEAD(&devlink_port->region_list); + devlink_port->initialized = true; +} +EXPORT_SYMBOL_GPL(devlink_port_init); + +/** + * devlink_port_fini() - Deinitialize devlink port + * + * @devlink_port: devlink port + * + * Deinitialize essencial stuff that is in use for functions + * that may be called after devlink port unregistration. + * Call to this function is optional and not needed + * in case the driver does not use such functions. + */ +void devlink_port_fini(struct devlink_port *devlink_port) +{ + WARN_ON(!list_empty(&devlink_port->region_list)); +} +EXPORT_SYMBOL_GPL(devlink_port_fini); + +/** + * devl_port_register() - Register devlink port + * + * @devlink: devlink + * @devlink_port: devlink port + * @port_index: driver-specific numerical identifier of the port + * + * Register devlink port with provided port index. User can use + * any indexing, even hw-related one. devlink_port structure + * is convenient to be embedded inside user driver private structure. + * Note that the caller should take care of zeroing the devlink_port + * structure. + */ +int devl_port_register(struct devlink *devlink, + struct devlink_port *devlink_port, + unsigned int port_index) +{ + int err; + + devl_assert_locked(devlink); + + ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); + + devlink_port_init(devlink, devlink_port); + devlink_port->registered = true; + devlink_port->index = port_index; + spin_lock_init(&devlink_port->type_lock); + INIT_LIST_HEAD(&devlink_port->reporter_list); + err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL); + if (err) + return err; + + INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); + devlink_port_type_warn_schedule(devlink_port); + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); + return 0; +} +EXPORT_SYMBOL_GPL(devl_port_register); + +/** + * devlink_port_register - Register devlink port + * + * @devlink: devlink + * @devlink_port: devlink port + * @port_index: driver-specific numerical identifier of the port + * + * Register devlink port with provided port index. User can use + * any indexing, even hw-related one. devlink_port structure + * is convenient to be embedded inside user driver private structure. + * Note that the caller should take care of zeroing the devlink_port + * structure. + * + * Context: Takes and release devlink->lock <mutex>. + */ +int devlink_port_register(struct devlink *devlink, + struct devlink_port *devlink_port, + unsigned int port_index) +{ + int err; + + devl_lock(devlink); + err = devl_port_register(devlink, devlink_port, port_index); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_port_register); + +/** + * devl_port_unregister() - Unregister devlink port + * + * @devlink_port: devlink port + */ +void devl_port_unregister(struct devlink_port *devlink_port) +{ + lockdep_assert_held(&devlink_port->devlink->lock); + WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET); + + devlink_port_type_warn_cancel(devlink_port); + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); + xa_erase(&devlink_port->devlink->ports, devlink_port->index); + WARN_ON(!list_empty(&devlink_port->reporter_list)); + devlink_port->registered = false; +} +EXPORT_SYMBOL_GPL(devl_port_unregister); + +/** + * devlink_port_unregister - Unregister devlink port + * + * @devlink_port: devlink port + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_port_unregister(struct devlink_port *devlink_port) +{ + struct devlink *devlink = devlink_port->devlink; + + devl_lock(devlink); + devl_port_unregister(devlink_port); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_port_unregister); + +static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, + struct net_device *netdev) +{ + const struct net_device_ops *ops = netdev->netdev_ops; + + /* If driver registers devlink port, it should set devlink port + * attributes accordingly so the compat functions are called + * and the original ops are not used. + */ + if (ops->ndo_get_phys_port_name) { + /* Some drivers use the same set of ndos for netdevs + * that have devlink_port registered and also for + * those who don't. Make sure that ndo_get_phys_port_name + * returns -EOPNOTSUPP here in case it is defined. + * Warn if not. + */ + char name[IFNAMSIZ]; + int err; + + err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); + WARN_ON(err != -EOPNOTSUPP); + } + if (ops->ndo_get_port_parent_id) { + /* Some drivers use the same set of ndos for netdevs + * that have devlink_port registered and also for + * those who don't. Make sure that ndo_get_port_parent_id + * returns -EOPNOTSUPP here in case it is defined. + * Warn if not. + */ + struct netdev_phys_item_id ppid; + int err; + + err = ops->ndo_get_port_parent_id(netdev, &ppid); + WARN_ON(err != -EOPNOTSUPP); + } +} + +static void __devlink_port_type_set(struct devlink_port *devlink_port, + enum devlink_port_type type, + void *type_dev) +{ + struct net_device *netdev = type_dev; + + ASSERT_DEVLINK_PORT_REGISTERED(devlink_port); + + if (type == DEVLINK_PORT_TYPE_NOTSET) { + devlink_port_type_warn_schedule(devlink_port); + } else { + devlink_port_type_warn_cancel(devlink_port); + if (type == DEVLINK_PORT_TYPE_ETH && netdev) + devlink_port_type_netdev_checks(devlink_port, netdev); + } + + spin_lock_bh(&devlink_port->type_lock); + devlink_port->type = type; + switch (type) { + case DEVLINK_PORT_TYPE_ETH: + devlink_port->type_eth.netdev = netdev; + if (netdev) { + ASSERT_RTNL(); + devlink_port->type_eth.ifindex = netdev->ifindex; + BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) != + sizeof(netdev->name)); + strcpy(devlink_port->type_eth.ifname, netdev->name); + } + break; + case DEVLINK_PORT_TYPE_IB: + devlink_port->type_ib.ibdev = type_dev; + break; + default: + break; + } + spin_unlock_bh(&devlink_port->type_lock); + devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); +} + +/** + * devlink_port_type_eth_set - Set port type to Ethernet + * + * @devlink_port: devlink port + * + * If driver is calling this, most likely it is doing something wrong. + */ +void devlink_port_type_eth_set(struct devlink_port *devlink_port) +{ + dev_warn(devlink_port->devlink->dev, + "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", + devlink_port->index); + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL); +} +EXPORT_SYMBOL_GPL(devlink_port_type_eth_set); + +/** + * devlink_port_type_ib_set - Set port type to InfiniBand + * + * @devlink_port: devlink port + * @ibdev: related IB device + */ +void devlink_port_type_ib_set(struct devlink_port *devlink_port, + struct ib_device *ibdev) +{ + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev); +} +EXPORT_SYMBOL_GPL(devlink_port_type_ib_set); + +/** + * devlink_port_type_clear - Clear port type + * + * @devlink_port: devlink port + * + * If driver is calling this for clearing Ethernet type, most likely + * it is doing something wrong. + */ +void devlink_port_type_clear(struct devlink_port *devlink_port) +{ + if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) + dev_warn(devlink_port->devlink->dev, + "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n", + devlink_port->index); + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); +} +EXPORT_SYMBOL_GPL(devlink_port_type_clear); + +int devlink_port_netdevice_event(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct net_device *netdev = netdev_notifier_info_to_dev(ptr); + struct devlink_port *devlink_port = netdev->devlink_port; + struct devlink *devlink; + + devlink = container_of(nb, struct devlink, netdevice_nb); + + if (!devlink_port || devlink_port->devlink != devlink) + return NOTIFY_OK; + + switch (event) { + case NETDEV_POST_INIT: + /* Set the type but not netdev pointer. It is going to be set + * later on by NETDEV_REGISTER event. Happens once during + * netdevice register + */ + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, + NULL); + break; + case NETDEV_REGISTER: + case NETDEV_CHANGENAME: + if (devlink_net(devlink) != dev_net(netdev)) + return NOTIFY_OK; + /* Set the netdev on top of previously set type. Note this + * event happens also during net namespace change so here + * we take into account netdev pointer appearing in this + * namespace. + */ + __devlink_port_type_set(devlink_port, devlink_port->type, + netdev); + break; + case NETDEV_UNREGISTER: + if (devlink_net(devlink) != dev_net(netdev)) + return NOTIFY_OK; + /* Clear netdev pointer, but not the type. This event happens + * also during net namespace change so we need to clear + * pointer to netdev that is going to another net namespace. + */ + __devlink_port_type_set(devlink_port, devlink_port->type, + NULL); + break; + case NETDEV_PRE_UNINIT: + /* Clear the type and the netdev pointer. Happens one during + * netdevice unregister. + */ + __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, + NULL); + break; + } + + return NOTIFY_OK; +} + +static int __devlink_port_attrs_set(struct devlink_port *devlink_port, + enum devlink_port_flavour flavour) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + + devlink_port->attrs_set = true; + attrs->flavour = flavour; + if (attrs->switch_id.id_len) { + devlink_port->switch_port = true; + if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) + attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; + } else { + devlink_port->switch_port = false; + } + return 0; +} + +/** + * devlink_port_attrs_set - Set port attributes + * + * @devlink_port: devlink port + * @attrs: devlink port attrs + */ +void devlink_port_attrs_set(struct devlink_port *devlink_port, + struct devlink_port_attrs *attrs) +{ + int ret; + + ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); + + devlink_port->attrs = *attrs; + ret = __devlink_port_attrs_set(devlink_port, attrs->flavour); + if (ret) + return; + WARN_ON(attrs->splittable && attrs->split); +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_set); + +/** + * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes + * + * @devlink_port: devlink port + * @controller: associated controller number for the devlink port instance + * @pf: associated PF for the devlink port instance + * @external: indicates if the port is for an external controller + */ +void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, + u16 pf, bool external) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int ret; + + ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); + + ret = __devlink_port_attrs_set(devlink_port, + DEVLINK_PORT_FLAVOUR_PCI_PF); + if (ret) + return; + attrs->pci_pf.controller = controller; + attrs->pci_pf.pf = pf; + attrs->pci_pf.external = external; +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set); + +/** + * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes + * + * @devlink_port: devlink port + * @controller: associated controller number for the devlink port instance + * @pf: associated PF for the devlink port instance + * @vf: associated VF of a PF for the devlink port instance + * @external: indicates if the port is for an external controller + */ +void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, + u16 pf, u16 vf, bool external) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int ret; + + ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); + + ret = __devlink_port_attrs_set(devlink_port, + DEVLINK_PORT_FLAVOUR_PCI_VF); + if (ret) + return; + attrs->pci_vf.controller = controller; + attrs->pci_vf.pf = pf; + attrs->pci_vf.vf = vf; + attrs->pci_vf.external = external; +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set); + +/** + * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes + * + * @devlink_port: devlink port + * @controller: associated controller number for the devlink port instance + * @pf: associated PF for the devlink port instance + * @sf: associated SF of a PF for the devlink port instance + * @external: indicates if the port is for an external controller + */ +void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller, + u16 pf, u32 sf, bool external) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int ret; + + ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); + + ret = __devlink_port_attrs_set(devlink_port, + DEVLINK_PORT_FLAVOUR_PCI_SF); + if (ret) + return; + attrs->pci_sf.controller = controller; + attrs->pci_sf.pf = pf; + attrs->pci_sf.sf = sf; + attrs->pci_sf.external = external; +} +EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set); + +/** + * devl_rate_node_create - create devlink rate node + * @devlink: devlink instance + * @priv: driver private data + * @node_name: name of the resulting node + * @parent: parent devlink_rate struct + * + * Create devlink rate object of type node + */ +struct devlink_rate * +devl_rate_node_create(struct devlink *devlink, void *priv, char *node_name, + struct devlink_rate *parent) +{ + struct devlink_rate *rate_node; + + rate_node = devlink_rate_node_get_by_name(devlink, node_name); + if (!IS_ERR(rate_node)) + return ERR_PTR(-EEXIST); + + rate_node = kzalloc(sizeof(*rate_node), GFP_KERNEL); + if (!rate_node) + return ERR_PTR(-ENOMEM); + + if (parent) { + rate_node->parent = parent; + refcount_inc(&rate_node->parent->refcnt); + } + + rate_node->type = DEVLINK_RATE_TYPE_NODE; + rate_node->devlink = devlink; + rate_node->priv = priv; + + rate_node->name = kstrdup(node_name, GFP_KERNEL); + if (!rate_node->name) { + kfree(rate_node); + return ERR_PTR(-ENOMEM); + } + + refcount_set(&rate_node->refcnt, 1); + list_add(&rate_node->list, &devlink->rate_list); + devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW); + return rate_node; +} +EXPORT_SYMBOL_GPL(devl_rate_node_create); + +/** + * devl_rate_leaf_create - create devlink rate leaf + * @devlink_port: devlink port object to create rate object on + * @priv: driver private data + * @parent: parent devlink_rate struct + * + * Create devlink rate object of type leaf on provided @devlink_port. + */ +int devl_rate_leaf_create(struct devlink_port *devlink_port, void *priv, + struct devlink_rate *parent) +{ + struct devlink *devlink = devlink_port->devlink; + struct devlink_rate *devlink_rate; + + devl_assert_locked(devlink_port->devlink); + + if (WARN_ON(devlink_port->devlink_rate)) + return -EBUSY; + + devlink_rate = kzalloc(sizeof(*devlink_rate), GFP_KERNEL); + if (!devlink_rate) + return -ENOMEM; + + if (parent) { + devlink_rate->parent = parent; + refcount_inc(&devlink_rate->parent->refcnt); + } + + devlink_rate->type = DEVLINK_RATE_TYPE_LEAF; + devlink_rate->devlink = devlink; + devlink_rate->devlink_port = devlink_port; + devlink_rate->priv = priv; + list_add_tail(&devlink_rate->list, &devlink->rate_list); + devlink_port->devlink_rate = devlink_rate; + devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW); + + return 0; +} +EXPORT_SYMBOL_GPL(devl_rate_leaf_create); + +/** + * devl_rate_leaf_destroy - destroy devlink rate leaf + * + * @devlink_port: devlink port linked to the rate object + * + * Destroy the devlink rate object of type leaf on provided @devlink_port. + */ +void devl_rate_leaf_destroy(struct devlink_port *devlink_port) +{ + struct devlink_rate *devlink_rate = devlink_port->devlink_rate; + + devl_assert_locked(devlink_port->devlink); + if (!devlink_rate) + return; + + devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL); + if (devlink_rate->parent) + refcount_dec(&devlink_rate->parent->refcnt); + list_del(&devlink_rate->list); + devlink_port->devlink_rate = NULL; + kfree(devlink_rate); +} +EXPORT_SYMBOL_GPL(devl_rate_leaf_destroy); + +/** + * devl_rate_nodes_destroy - destroy all devlink rate nodes on device + * @devlink: devlink instance + * + * Unset parent for all rate objects and destroy all rate nodes + * on specified device. + */ +void devl_rate_nodes_destroy(struct devlink *devlink) +{ + static struct devlink_rate *devlink_rate, *tmp; + const struct devlink_ops *ops = devlink->ops; + + devl_assert_locked(devlink); + + list_for_each_entry(devlink_rate, &devlink->rate_list, list) { + if (!devlink_rate->parent) + continue; + + refcount_dec(&devlink_rate->parent->refcnt); + if (devlink_rate_is_leaf(devlink_rate)) + ops->rate_leaf_parent_set(devlink_rate, NULL, devlink_rate->priv, + NULL, NULL); + else if (devlink_rate_is_node(devlink_rate)) + ops->rate_node_parent_set(devlink_rate, NULL, devlink_rate->priv, + NULL, NULL); + } + list_for_each_entry_safe(devlink_rate, tmp, &devlink->rate_list, list) { + if (devlink_rate_is_node(devlink_rate)) { + ops->rate_node_del(devlink_rate, devlink_rate->priv, NULL); + list_del(&devlink_rate->list); + kfree(devlink_rate->name); + kfree(devlink_rate); + } + } +} +EXPORT_SYMBOL_GPL(devl_rate_nodes_destroy); + +/** + * devlink_port_linecard_set - Link port with a linecard + * + * @devlink_port: devlink port + * @linecard: devlink linecard + */ +void devlink_port_linecard_set(struct devlink_port *devlink_port, + struct devlink_linecard *linecard) +{ + ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); + + devlink_port->linecard = linecard; +} +EXPORT_SYMBOL_GPL(devlink_port_linecard_set); + +static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, + char *name, size_t len) +{ + struct devlink_port_attrs *attrs = &devlink_port->attrs; + int n = 0; + + if (!devlink_port->attrs_set) + return -EOPNOTSUPP; + + switch (attrs->flavour) { + case DEVLINK_PORT_FLAVOUR_PHYSICAL: + if (devlink_port->linecard) + n = snprintf(name, len, "l%u", + devlink_port->linecard->index); + if (n < len) + n += snprintf(name + n, len - n, "p%u", + attrs->phys.port_number); + if (n < len && attrs->split) + n += snprintf(name + n, len - n, "s%u", + attrs->phys.split_subport_number); + break; + case DEVLINK_PORT_FLAVOUR_CPU: + case DEVLINK_PORT_FLAVOUR_DSA: + case DEVLINK_PORT_FLAVOUR_UNUSED: + /* As CPU and DSA ports do not have a netdevice associated + * case should not ever happen. + */ + WARN_ON(1); + return -EINVAL; + case DEVLINK_PORT_FLAVOUR_PCI_PF: + if (attrs->pci_pf.external) { + n = snprintf(name, len, "c%u", attrs->pci_pf.controller); + if (n >= len) + return -EINVAL; + len -= n; + name += n; + } + n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); + break; + case DEVLINK_PORT_FLAVOUR_PCI_VF: + if (attrs->pci_vf.external) { + n = snprintf(name, len, "c%u", attrs->pci_vf.controller); + if (n >= len) + return -EINVAL; + len -= n; + name += n; + } + n = snprintf(name, len, "pf%uvf%u", + attrs->pci_vf.pf, attrs->pci_vf.vf); + break; + case DEVLINK_PORT_FLAVOUR_PCI_SF: + if (attrs->pci_sf.external) { + n = snprintf(name, len, "c%u", attrs->pci_sf.controller); + if (n >= len) + return -EINVAL; + len -= n; + name += n; + } + n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf, + attrs->pci_sf.sf); + break; + case DEVLINK_PORT_FLAVOUR_VIRTUAL: + return -EOPNOTSUPP; + } + + if (n >= len) + return -EINVAL; + + return 0; +} + +static int devlink_linecard_types_init(struct devlink_linecard *linecard) +{ + struct devlink_linecard_type *linecard_type; + unsigned int count; + int i; + + count = linecard->ops->types_count(linecard, linecard->priv); + linecard->types = kmalloc_array(count, sizeof(*linecard_type), + GFP_KERNEL); + if (!linecard->types) + return -ENOMEM; + linecard->types_count = count; + + for (i = 0; i < count; i++) { + linecard_type = &linecard->types[i]; + linecard->ops->types_get(linecard, linecard->priv, i, + &linecard_type->type, + &linecard_type->priv); + } + return 0; +} + +static void devlink_linecard_types_fini(struct devlink_linecard *linecard) +{ + kfree(linecard->types); +} + +/** + * devl_linecard_create - Create devlink linecard + * + * @devlink: devlink + * @linecard_index: driver-specific numerical identifier of the linecard + * @ops: linecards ops + * @priv: user priv pointer + * + * Create devlink linecard instance with provided linecard index. + * Caller can use any indexing, even hw-related one. + * + * Return: Line card structure or an ERR_PTR() encoded error code. + */ +struct devlink_linecard * +devl_linecard_create(struct devlink *devlink, unsigned int linecard_index, + const struct devlink_linecard_ops *ops, void *priv) +{ + struct devlink_linecard *linecard; + int err; + + if (WARN_ON(!ops || !ops->provision || !ops->unprovision || + !ops->types_count || !ops->types_get)) + return ERR_PTR(-EINVAL); + + if (devlink_linecard_index_exists(devlink, linecard_index)) + return ERR_PTR(-EEXIST); + + linecard = kzalloc(sizeof(*linecard), GFP_KERNEL); + if (!linecard) + return ERR_PTR(-ENOMEM); + + linecard->devlink = devlink; + linecard->index = linecard_index; + linecard->ops = ops; + linecard->priv = priv; + linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; + mutex_init(&linecard->state_lock); + + err = devlink_linecard_types_init(linecard); + if (err) { + mutex_destroy(&linecard->state_lock); + kfree(linecard); + return ERR_PTR(err); + } + + list_add_tail(&linecard->list, &devlink->linecard_list); + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + return linecard; +} +EXPORT_SYMBOL_GPL(devl_linecard_create); + +/** + * devl_linecard_destroy - Destroy devlink linecard + * + * @linecard: devlink linecard + */ +void devl_linecard_destroy(struct devlink_linecard *linecard) +{ + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL); + list_del(&linecard->list); + devlink_linecard_types_fini(linecard); + mutex_destroy(&linecard->state_lock); + kfree(linecard); +} +EXPORT_SYMBOL_GPL(devl_linecard_destroy); + +/** + * devlink_linecard_provision_set - Set provisioning on linecard + * + * @linecard: devlink linecard + * @type: linecard type + * + * This is either called directly from the provision() op call or + * as a result of the provision() op call asynchronously. + */ +void devlink_linecard_provision_set(struct devlink_linecard *linecard, + const char *type) +{ + mutex_lock(&linecard->state_lock); + WARN_ON(linecard->type && strcmp(linecard->type, type)); + linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED; + linecard->type = type; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); +} +EXPORT_SYMBOL_GPL(devlink_linecard_provision_set); + +/** + * devlink_linecard_provision_clear - Clear provisioning on linecard + * + * @linecard: devlink linecard + * + * This is either called directly from the unprovision() op call or + * as a result of the unprovision() op call asynchronously. + */ +void devlink_linecard_provision_clear(struct devlink_linecard *linecard) +{ + mutex_lock(&linecard->state_lock); + WARN_ON(linecard->nested_devlink); + linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED; + linecard->type = NULL; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); +} +EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear); + +/** + * devlink_linecard_provision_fail - Fail provisioning on linecard + * + * @linecard: devlink linecard + * + * This is either called directly from the provision() op call or + * as a result of the provision() op call asynchronously. + */ +void devlink_linecard_provision_fail(struct devlink_linecard *linecard) +{ + mutex_lock(&linecard->state_lock); + WARN_ON(linecard->nested_devlink); + linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); +} +EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail); + +/** + * devlink_linecard_activate - Set linecard active + * + * @linecard: devlink linecard + */ +void devlink_linecard_activate(struct devlink_linecard *linecard) +{ + mutex_lock(&linecard->state_lock); + WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED); + linecard->state = DEVLINK_LINECARD_STATE_ACTIVE; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); +} +EXPORT_SYMBOL_GPL(devlink_linecard_activate); + +/** + * devlink_linecard_deactivate - Set linecard inactive + * + * @linecard: devlink linecard + */ +void devlink_linecard_deactivate(struct devlink_linecard *linecard) +{ + mutex_lock(&linecard->state_lock); + switch (linecard->state) { + case DEVLINK_LINECARD_STATE_ACTIVE: + linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + break; + case DEVLINK_LINECARD_STATE_UNPROVISIONING: + /* Line card is being deactivated as part + * of unprovisioning flow. + */ + break; + default: + WARN_ON(1); + break; + } + mutex_unlock(&linecard->state_lock); +} +EXPORT_SYMBOL_GPL(devlink_linecard_deactivate); + +/** + * devlink_linecard_nested_dl_set - Attach/detach nested devlink + * instance to linecard. + * + * @linecard: devlink linecard + * @nested_devlink: devlink instance to attach or NULL to detach + */ +void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard, + struct devlink *nested_devlink) +{ + mutex_lock(&linecard->state_lock); + linecard->nested_devlink = nested_devlink; + devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW); + mutex_unlock(&linecard->state_lock); +} +EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set); + +int devl_sb_register(struct devlink *devlink, unsigned int sb_index, + u32 size, u16 ingress_pools_count, + u16 egress_pools_count, u16 ingress_tc_count, + u16 egress_tc_count) +{ + struct devlink_sb *devlink_sb; + + lockdep_assert_held(&devlink->lock); + + if (devlink_sb_index_exists(devlink, sb_index)) + return -EEXIST; + + devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL); + if (!devlink_sb) + return -ENOMEM; + devlink_sb->index = sb_index; + devlink_sb->size = size; + devlink_sb->ingress_pools_count = ingress_pools_count; + devlink_sb->egress_pools_count = egress_pools_count; + devlink_sb->ingress_tc_count = ingress_tc_count; + devlink_sb->egress_tc_count = egress_tc_count; + list_add_tail(&devlink_sb->list, &devlink->sb_list); + return 0; +} +EXPORT_SYMBOL_GPL(devl_sb_register); + +int devlink_sb_register(struct devlink *devlink, unsigned int sb_index, + u32 size, u16 ingress_pools_count, + u16 egress_pools_count, u16 ingress_tc_count, + u16 egress_tc_count) +{ + int err; + + devl_lock(devlink); + err = devl_sb_register(devlink, sb_index, size, ingress_pools_count, + egress_pools_count, ingress_tc_count, + egress_tc_count); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_sb_register); + +void devl_sb_unregister(struct devlink *devlink, unsigned int sb_index) +{ + struct devlink_sb *devlink_sb; + + lockdep_assert_held(&devlink->lock); + + devlink_sb = devlink_sb_get_by_index(devlink, sb_index); + WARN_ON(!devlink_sb); + list_del(&devlink_sb->list); + kfree(devlink_sb); +} +EXPORT_SYMBOL_GPL(devl_sb_unregister); + +void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index) +{ + devl_lock(devlink); + devl_sb_unregister(devlink, sb_index); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_sb_unregister); + +/** + * devl_dpipe_headers_register - register dpipe headers + * + * @devlink: devlink + * @dpipe_headers: dpipe header array + * + * Register the headers supported by hardware. + */ +void devl_dpipe_headers_register(struct devlink *devlink, + struct devlink_dpipe_headers *dpipe_headers) +{ + lockdep_assert_held(&devlink->lock); + + devlink->dpipe_headers = dpipe_headers; +} +EXPORT_SYMBOL_GPL(devl_dpipe_headers_register); + +/** + * devl_dpipe_headers_unregister - unregister dpipe headers + * + * @devlink: devlink + * + * Unregister the headers supported by hardware. + */ +void devl_dpipe_headers_unregister(struct devlink *devlink) +{ + lockdep_assert_held(&devlink->lock); + + devlink->dpipe_headers = NULL; +} +EXPORT_SYMBOL_GPL(devl_dpipe_headers_unregister); + +/** + * devlink_dpipe_table_counter_enabled - check if counter allocation + * required + * @devlink: devlink + * @table_name: tables name + * + * Used by driver to check if counter allocation is required. + * After counter allocation is turned on the table entries + * are updated to include counter statistics. + * + * After that point on the driver must respect the counter + * state so that each entry added to the table is added + * with a counter. + */ +bool devlink_dpipe_table_counter_enabled(struct devlink *devlink, + const char *table_name) +{ + struct devlink_dpipe_table *table; + bool enabled; + + rcu_read_lock(); + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + enabled = false; + if (table) + enabled = table->counters_enabled; + rcu_read_unlock(); + return enabled; +} +EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled); + +/** + * devl_dpipe_table_register - register dpipe table + * + * @devlink: devlink + * @table_name: table name + * @table_ops: table ops + * @priv: priv + * @counter_control_extern: external control for counters + */ +int devl_dpipe_table_register(struct devlink *devlink, + const char *table_name, + struct devlink_dpipe_table_ops *table_ops, + void *priv, bool counter_control_extern) +{ + struct devlink_dpipe_table *table; + + lockdep_assert_held(&devlink->lock); + + if (WARN_ON(!table_ops->size_get)) + return -EINVAL; + + if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name, + devlink)) + return -EEXIST; + + table = kzalloc(sizeof(*table), GFP_KERNEL); + if (!table) + return -ENOMEM; + + table->name = table_name; + table->table_ops = table_ops; + table->priv = priv; + table->counter_control_extern = counter_control_extern; + + list_add_tail_rcu(&table->list, &devlink->dpipe_table_list); + + return 0; +} +EXPORT_SYMBOL_GPL(devl_dpipe_table_register); + +/** + * devl_dpipe_table_unregister - unregister dpipe table + * + * @devlink: devlink + * @table_name: table name + */ +void devl_dpipe_table_unregister(struct devlink *devlink, + const char *table_name) +{ + struct devlink_dpipe_table *table; + + lockdep_assert_held(&devlink->lock); + + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return; + list_del_rcu(&table->list); + kfree_rcu(table, rcu); +} +EXPORT_SYMBOL_GPL(devl_dpipe_table_unregister); + +/** + * devl_resource_register - devlink resource register + * + * @devlink: devlink + * @resource_name: resource's name + * @resource_size: resource's size + * @resource_id: resource's id + * @parent_resource_id: resource's parent id + * @size_params: size parameters + * + * Generic resources should reuse the same names across drivers. + * Please see the generic resources list at: + * Documentation/networking/devlink/devlink-resource.rst + */ +int devl_resource_register(struct devlink *devlink, + const char *resource_name, + u64 resource_size, + u64 resource_id, + u64 parent_resource_id, + const struct devlink_resource_size_params *size_params) +{ + struct devlink_resource *resource; + struct list_head *resource_list; + bool top_hierarchy; + + lockdep_assert_held(&devlink->lock); + + top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP; + + resource = devlink_resource_find(devlink, NULL, resource_id); + if (resource) + return -EINVAL; + + resource = kzalloc(sizeof(*resource), GFP_KERNEL); + if (!resource) + return -ENOMEM; + + if (top_hierarchy) { + resource_list = &devlink->resource_list; + } else { + struct devlink_resource *parent_resource; + + parent_resource = devlink_resource_find(devlink, NULL, + parent_resource_id); + if (parent_resource) { + resource_list = &parent_resource->resource_list; + resource->parent = parent_resource; + } else { + kfree(resource); + return -EINVAL; + } + } + + resource->name = resource_name; + resource->size = resource_size; + resource->size_new = resource_size; + resource->id = resource_id; + resource->size_valid = true; + memcpy(&resource->size_params, size_params, + sizeof(resource->size_params)); + INIT_LIST_HEAD(&resource->resource_list); + list_add_tail(&resource->list, resource_list); + + return 0; +} +EXPORT_SYMBOL_GPL(devl_resource_register); + +/** + * devlink_resource_register - devlink resource register + * + * @devlink: devlink + * @resource_name: resource's name + * @resource_size: resource's size + * @resource_id: resource's id + * @parent_resource_id: resource's parent id + * @size_params: size parameters + * + * Generic resources should reuse the same names across drivers. + * Please see the generic resources list at: + * Documentation/networking/devlink/devlink-resource.rst + * + * Context: Takes and release devlink->lock <mutex>. + */ +int devlink_resource_register(struct devlink *devlink, + const char *resource_name, + u64 resource_size, + u64 resource_id, + u64 parent_resource_id, + const struct devlink_resource_size_params *size_params) +{ + int err; + + devl_lock(devlink); + err = devl_resource_register(devlink, resource_name, resource_size, + resource_id, parent_resource_id, size_params); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_resource_register); + +static void devlink_resource_unregister(struct devlink *devlink, + struct devlink_resource *resource) +{ + struct devlink_resource *tmp, *child_resource; + + list_for_each_entry_safe(child_resource, tmp, &resource->resource_list, + list) { + devlink_resource_unregister(devlink, child_resource); + list_del(&child_resource->list); + kfree(child_resource); + } +} + +/** + * devl_resources_unregister - free all resources + * + * @devlink: devlink + */ +void devl_resources_unregister(struct devlink *devlink) +{ + struct devlink_resource *tmp, *child_resource; + + lockdep_assert_held(&devlink->lock); + + list_for_each_entry_safe(child_resource, tmp, &devlink->resource_list, + list) { + devlink_resource_unregister(devlink, child_resource); + list_del(&child_resource->list); + kfree(child_resource); + } +} +EXPORT_SYMBOL_GPL(devl_resources_unregister); + +/** + * devlink_resources_unregister - free all resources + * + * @devlink: devlink + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_resources_unregister(struct devlink *devlink) +{ + devl_lock(devlink); + devl_resources_unregister(devlink); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_resources_unregister); + +/** + * devl_resource_size_get - get and update size + * + * @devlink: devlink + * @resource_id: the requested resource id + * @p_resource_size: ptr to update + */ +int devl_resource_size_get(struct devlink *devlink, + u64 resource_id, + u64 *p_resource_size) +{ + struct devlink_resource *resource; + + lockdep_assert_held(&devlink->lock); + + resource = devlink_resource_find(devlink, NULL, resource_id); + if (!resource) + return -EINVAL; + *p_resource_size = resource->size_new; + resource->size = resource->size_new; + return 0; +} +EXPORT_SYMBOL_GPL(devl_resource_size_get); + +/** + * devl_dpipe_table_resource_set - set the resource id + * + * @devlink: devlink + * @table_name: table name + * @resource_id: resource id + * @resource_units: number of resource's units consumed per table's entry + */ +int devl_dpipe_table_resource_set(struct devlink *devlink, + const char *table_name, u64 resource_id, + u64 resource_units) +{ + struct devlink_dpipe_table *table; + + table = devlink_dpipe_table_find(&devlink->dpipe_table_list, + table_name, devlink); + if (!table) + return -EINVAL; + + table->resource_id = resource_id; + table->resource_units = resource_units; + table->resource_valid = true; + return 0; +} +EXPORT_SYMBOL_GPL(devl_dpipe_table_resource_set); + +/** + * devl_resource_occ_get_register - register occupancy getter + * + * @devlink: devlink + * @resource_id: resource id + * @occ_get: occupancy getter callback + * @occ_get_priv: occupancy getter callback priv + */ +void devl_resource_occ_get_register(struct devlink *devlink, + u64 resource_id, + devlink_resource_occ_get_t *occ_get, + void *occ_get_priv) +{ + struct devlink_resource *resource; + + lockdep_assert_held(&devlink->lock); + + resource = devlink_resource_find(devlink, NULL, resource_id); + if (WARN_ON(!resource)) + return; + WARN_ON(resource->occ_get); + + resource->occ_get = occ_get; + resource->occ_get_priv = occ_get_priv; +} +EXPORT_SYMBOL_GPL(devl_resource_occ_get_register); + +/** + * devlink_resource_occ_get_register - register occupancy getter + * + * @devlink: devlink + * @resource_id: resource id + * @occ_get: occupancy getter callback + * @occ_get_priv: occupancy getter callback priv + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_resource_occ_get_register(struct devlink *devlink, + u64 resource_id, + devlink_resource_occ_get_t *occ_get, + void *occ_get_priv) +{ + devl_lock(devlink); + devl_resource_occ_get_register(devlink, resource_id, + occ_get, occ_get_priv); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register); + +/** + * devl_resource_occ_get_unregister - unregister occupancy getter + * + * @devlink: devlink + * @resource_id: resource id + */ +void devl_resource_occ_get_unregister(struct devlink *devlink, + u64 resource_id) +{ + struct devlink_resource *resource; + + lockdep_assert_held(&devlink->lock); + + resource = devlink_resource_find(devlink, NULL, resource_id); + if (WARN_ON(!resource)) + return; + WARN_ON(!resource->occ_get); + + resource->occ_get = NULL; + resource->occ_get_priv = NULL; +} +EXPORT_SYMBOL_GPL(devl_resource_occ_get_unregister); + +/** + * devlink_resource_occ_get_unregister - unregister occupancy getter + * + * @devlink: devlink + * @resource_id: resource id + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_resource_occ_get_unregister(struct devlink *devlink, + u64 resource_id) +{ + devl_lock(devlink); + devl_resource_occ_get_unregister(devlink, resource_id); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister); + +static int devlink_param_verify(const struct devlink_param *param) +{ + if (!param || !param->name || !param->supported_cmodes) + return -EINVAL; + if (param->generic) + return devlink_param_generic_verify(param); + else + return devlink_param_driver_verify(param); +} + +static int devlink_param_register(struct devlink *devlink, + const struct devlink_param *param) +{ + struct devlink_param_item *param_item; + int err; + + WARN_ON(devlink_param_verify(param)); + WARN_ON(devlink_param_find_by_name(&devlink->params, param->name)); + + if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT)) + WARN_ON(param->get || param->set); + else + WARN_ON(!param->get || !param->set); + + param_item = kzalloc(sizeof(*param_item), GFP_KERNEL); + if (!param_item) + return -ENOMEM; + + param_item->param = param; + + err = xa_insert(&devlink->params, param->id, param_item, GFP_KERNEL); + if (err) + goto err_xa_insert; + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); + return 0; + +err_xa_insert: + kfree(param_item); + return err; +} + +static void devlink_param_unregister(struct devlink *devlink, + const struct devlink_param *param) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(&devlink->params, param->id); + if (WARN_ON(!param_item)) + return; + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_DEL); + xa_erase(&devlink->params, param->id); + kfree(param_item); +} + +/** + * devl_params_register - register configuration parameters + * + * @devlink: devlink + * @params: configuration parameters array + * @params_count: number of parameters provided + * + * Register the configuration parameters supported by the driver. + */ +int devl_params_register(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + const struct devlink_param *param = params; + int i, err; + + lockdep_assert_held(&devlink->lock); + + for (i = 0; i < params_count; i++, param++) { + err = devlink_param_register(devlink, param); + if (err) + goto rollback; + } + return 0; + +rollback: + if (!i) + return err; + + for (param--; i > 0; i--, param--) + devlink_param_unregister(devlink, param); + return err; +} +EXPORT_SYMBOL_GPL(devl_params_register); + +int devlink_params_register(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + int err; + + devl_lock(devlink); + err = devl_params_register(devlink, params, params_count); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_params_register); + +/** + * devl_params_unregister - unregister configuration parameters + * @devlink: devlink + * @params: configuration parameters to unregister + * @params_count: number of parameters provided + */ +void devl_params_unregister(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + const struct devlink_param *param = params; + int i; + + lockdep_assert_held(&devlink->lock); + + for (i = 0; i < params_count; i++, param++) + devlink_param_unregister(devlink, param); +} +EXPORT_SYMBOL_GPL(devl_params_unregister); + +void devlink_params_unregister(struct devlink *devlink, + const struct devlink_param *params, + size_t params_count) +{ + devl_lock(devlink); + devl_params_unregister(devlink, params, params_count); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_params_unregister); + +/** + * devl_param_driverinit_value_get - get configuration parameter + * value for driver initializing + * + * @devlink: devlink + * @param_id: parameter ID + * @val: pointer to store the value of parameter in driverinit + * configuration mode + * + * This function should be used by the driver to get driverinit + * configuration for initialization after reload command. + * + * Note that lockless call of this function relies on the + * driver to maintain following basic sane behavior: + * 1) Driver ensures a call to this function cannot race with + * registering/unregistering the parameter with the same parameter ID. + * 2) Driver ensures a call to this function cannot race with + * devl_param_driverinit_value_set() call with the same parameter ID. + * 3) Driver ensures a call to this function cannot race with + * reload operation. + * If the driver is not able to comply, it has to take the devlink->lock + * while calling this. + */ +int devl_param_driverinit_value_get(struct devlink *devlink, u32 param_id, + union devlink_param_value *val) +{ + struct devlink_param_item *param_item; + + if (WARN_ON(!devlink_reload_supported(devlink->ops))) + return -EOPNOTSUPP; + + param_item = devlink_param_find_by_id(&devlink->params, param_id); + if (!param_item) + return -EINVAL; + + if (!param_item->driverinit_value_valid) + return -EOPNOTSUPP; + + if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT))) + return -EOPNOTSUPP; + + *val = param_item->driverinit_value; + + return 0; +} +EXPORT_SYMBOL_GPL(devl_param_driverinit_value_get); + +/** + * devl_param_driverinit_value_set - set value of configuration + * parameter for driverinit + * configuration mode + * + * @devlink: devlink + * @param_id: parameter ID + * @init_val: value of parameter to set for driverinit configuration mode + * + * This function should be used by the driver to set driverinit + * configuration mode default value. + */ +void devl_param_driverinit_value_set(struct devlink *devlink, u32 param_id, + union devlink_param_value init_val) +{ + struct devlink_param_item *param_item; + + devl_assert_locked(devlink); + + param_item = devlink_param_find_by_id(&devlink->params, param_id); + if (WARN_ON(!param_item)) + return; + + if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT))) + return; + + param_item->driverinit_value = init_val; + param_item->driverinit_value_valid = true; + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devl_param_driverinit_value_set); + +void devlink_params_driverinit_load_new(struct devlink *devlink) +{ + struct devlink_param_item *param_item; + unsigned long param_id; + + xa_for_each(&devlink->params, param_id, param_item) { + if (!devlink_param_cmode_is_supported(param_item->param, + DEVLINK_PARAM_CMODE_DRIVERINIT) || + !param_item->driverinit_value_new_valid) + continue; + param_item->driverinit_value = param_item->driverinit_value_new; + param_item->driverinit_value_valid = true; + param_item->driverinit_value_new_valid = false; + } +} + +/** + * devl_param_value_changed - notify devlink on a parameter's value + * change. Should be called by the driver + * right after the change. + * + * @devlink: devlink + * @param_id: parameter ID + * + * This function should be used by the driver to notify devlink on value + * change, excluding driverinit configuration mode. + * For driverinit configuration mode driver should use the function + */ +void devl_param_value_changed(struct devlink *devlink, u32 param_id) +{ + struct devlink_param_item *param_item; + + param_item = devlink_param_find_by_id(&devlink->params, param_id); + WARN_ON(!param_item); + + devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW); +} +EXPORT_SYMBOL_GPL(devl_param_value_changed); + +/** + * devl_region_create - create a new address region + * + * @devlink: devlink + * @ops: region operations and name + * @region_max_snapshots: Maximum supported number of snapshots for region + * @region_size: size of region + */ +struct devlink_region *devl_region_create(struct devlink *devlink, + const struct devlink_region_ops *ops, + u32 region_max_snapshots, + u64 region_size) +{ + struct devlink_region *region; + + devl_assert_locked(devlink); + + if (WARN_ON(!ops) || WARN_ON(!ops->destructor)) + return ERR_PTR(-EINVAL); + + if (devlink_region_get_by_name(devlink, ops->name)) + return ERR_PTR(-EEXIST); + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) + return ERR_PTR(-ENOMEM); + + region->devlink = devlink; + region->max_snapshots = region_max_snapshots; + region->ops = ops; + region->size = region_size; + INIT_LIST_HEAD(®ion->snapshot_list); + mutex_init(®ion->snapshot_lock); + list_add_tail(®ion->list, &devlink->region_list); + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW); + + return region; +} +EXPORT_SYMBOL_GPL(devl_region_create); + +/** + * devlink_region_create - create a new address region + * + * @devlink: devlink + * @ops: region operations and name + * @region_max_snapshots: Maximum supported number of snapshots for region + * @region_size: size of region + * + * Context: Takes and release devlink->lock <mutex>. + */ +struct devlink_region * +devlink_region_create(struct devlink *devlink, + const struct devlink_region_ops *ops, + u32 region_max_snapshots, u64 region_size) +{ + struct devlink_region *region; + + devl_lock(devlink); + region = devl_region_create(devlink, ops, region_max_snapshots, + region_size); + devl_unlock(devlink); + return region; +} +EXPORT_SYMBOL_GPL(devlink_region_create); + +/** + * devlink_port_region_create - create a new address region for a port + * + * @port: devlink port + * @ops: region operations and name + * @region_max_snapshots: Maximum supported number of snapshots for region + * @region_size: size of region + * + * Context: Takes and release devlink->lock <mutex>. + */ +struct devlink_region * +devlink_port_region_create(struct devlink_port *port, + const struct devlink_port_region_ops *ops, + u32 region_max_snapshots, u64 region_size) +{ + struct devlink *devlink = port->devlink; + struct devlink_region *region; + int err = 0; + + ASSERT_DEVLINK_PORT_INITIALIZED(port); + + if (WARN_ON(!ops) || WARN_ON(!ops->destructor)) + return ERR_PTR(-EINVAL); + + devl_lock(devlink); + + if (devlink_port_region_get_by_name(port, ops->name)) { + err = -EEXIST; + goto unlock; + } + + region = kzalloc(sizeof(*region), GFP_KERNEL); + if (!region) { + err = -ENOMEM; + goto unlock; + } + + region->devlink = devlink; + region->port = port; + region->max_snapshots = region_max_snapshots; + region->port_ops = ops; + region->size = region_size; + INIT_LIST_HEAD(®ion->snapshot_list); + mutex_init(®ion->snapshot_lock); + list_add_tail(®ion->list, &port->region_list); + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW); + + devl_unlock(devlink); + return region; + +unlock: + devl_unlock(devlink); + return ERR_PTR(err); +} +EXPORT_SYMBOL_GPL(devlink_port_region_create); + +/** + * devl_region_destroy - destroy address region + * + * @region: devlink region to destroy + */ +void devl_region_destroy(struct devlink_region *region) +{ + struct devlink *devlink = region->devlink; + struct devlink_snapshot *snapshot, *ts; + + devl_assert_locked(devlink); + + /* Free all snapshots of region */ + mutex_lock(®ion->snapshot_lock); + list_for_each_entry_safe(snapshot, ts, ®ion->snapshot_list, list) + devlink_region_snapshot_del(region, snapshot); + mutex_unlock(®ion->snapshot_lock); + + list_del(®ion->list); + mutex_destroy(®ion->snapshot_lock); + + devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL); + kfree(region); +} +EXPORT_SYMBOL_GPL(devl_region_destroy); + +/** + * devlink_region_destroy - destroy address region + * + * @region: devlink region to destroy + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_region_destroy(struct devlink_region *region) +{ + struct devlink *devlink = region->devlink; + + devl_lock(devlink); + devl_region_destroy(region); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_region_destroy); + +/** + * devlink_region_snapshot_id_get - get snapshot ID + * + * This callback should be called when adding a new snapshot, + * Driver should use the same id for multiple snapshots taken + * on multiple regions at the same time/by the same trigger. + * + * The caller of this function must use devlink_region_snapshot_id_put + * when finished creating regions using this id. + * + * Returns zero on success, or a negative error code on failure. + * + * @devlink: devlink + * @id: storage to return id + */ +int devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id) +{ + return __devlink_region_snapshot_id_get(devlink, id); +} +EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_get); + +/** + * devlink_region_snapshot_id_put - put snapshot ID reference + * + * This should be called by a driver after finishing creating snapshots + * with an id. Doing so ensures that the ID can later be released in the + * event that all snapshots using it have been destroyed. + * + * @devlink: devlink + * @id: id to release reference on + */ +void devlink_region_snapshot_id_put(struct devlink *devlink, u32 id) +{ + __devlink_snapshot_id_decrement(devlink, id); +} +EXPORT_SYMBOL_GPL(devlink_region_snapshot_id_put); + +/** + * devlink_region_snapshot_create - create a new snapshot + * This will add a new snapshot of a region. The snapshot + * will be stored on the region struct and can be accessed + * from devlink. This is useful for future analyses of snapshots. + * Multiple snapshots can be created on a region. + * The @snapshot_id should be obtained using the getter function. + * + * @region: devlink region of the snapshot + * @data: snapshot data + * @snapshot_id: snapshot id to be created + */ +int devlink_region_snapshot_create(struct devlink_region *region, + u8 *data, u32 snapshot_id) +{ + int err; + + mutex_lock(®ion->snapshot_lock); + err = __devlink_region_snapshot_create(region, data, snapshot_id); + mutex_unlock(®ion->snapshot_lock); + return err; +} +EXPORT_SYMBOL_GPL(devlink_region_snapshot_create); + +#define DEVLINK_TRAP(_id, _type) \ + { \ + .type = DEVLINK_TRAP_TYPE_##_type, \ + .id = DEVLINK_TRAP_GENERIC_ID_##_id, \ + .name = DEVLINK_TRAP_GENERIC_NAME_##_id, \ + } + +static const struct devlink_trap devlink_trap_generic[] = { + DEVLINK_TRAP(SMAC_MC, DROP), + DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP), + DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP), + DEVLINK_TRAP(INGRESS_STP_FILTER, DROP), + DEVLINK_TRAP(EMPTY_TX_LIST, DROP), + DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP), + DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP), + DEVLINK_TRAP(TTL_ERROR, EXCEPTION), + DEVLINK_TRAP(TAIL_DROP, DROP), + DEVLINK_TRAP(NON_IP_PACKET, DROP), + DEVLINK_TRAP(UC_DIP_MC_DMAC, DROP), + DEVLINK_TRAP(DIP_LB, DROP), + DEVLINK_TRAP(SIP_MC, DROP), + DEVLINK_TRAP(SIP_LB, DROP), + DEVLINK_TRAP(CORRUPTED_IP_HDR, DROP), + DEVLINK_TRAP(IPV4_SIP_BC, DROP), + DEVLINK_TRAP(IPV6_MC_DIP_RESERVED_SCOPE, DROP), + DEVLINK_TRAP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, DROP), + DEVLINK_TRAP(MTU_ERROR, EXCEPTION), + DEVLINK_TRAP(UNRESOLVED_NEIGH, EXCEPTION), + DEVLINK_TRAP(RPF, EXCEPTION), + DEVLINK_TRAP(REJECT_ROUTE, EXCEPTION), + DEVLINK_TRAP(IPV4_LPM_UNICAST_MISS, EXCEPTION), + DEVLINK_TRAP(IPV6_LPM_UNICAST_MISS, EXCEPTION), + DEVLINK_TRAP(NON_ROUTABLE, DROP), + DEVLINK_TRAP(DECAP_ERROR, EXCEPTION), + DEVLINK_TRAP(OVERLAY_SMAC_MC, DROP), + DEVLINK_TRAP(INGRESS_FLOW_ACTION_DROP, DROP), + DEVLINK_TRAP(EGRESS_FLOW_ACTION_DROP, DROP), + DEVLINK_TRAP(STP, CONTROL), + DEVLINK_TRAP(LACP, CONTROL), + DEVLINK_TRAP(LLDP, CONTROL), + DEVLINK_TRAP(IGMP_QUERY, CONTROL), + DEVLINK_TRAP(IGMP_V1_REPORT, CONTROL), + DEVLINK_TRAP(IGMP_V2_REPORT, CONTROL), + DEVLINK_TRAP(IGMP_V3_REPORT, CONTROL), + DEVLINK_TRAP(IGMP_V2_LEAVE, CONTROL), + DEVLINK_TRAP(MLD_QUERY, CONTROL), + DEVLINK_TRAP(MLD_V1_REPORT, CONTROL), + DEVLINK_TRAP(MLD_V2_REPORT, CONTROL), + DEVLINK_TRAP(MLD_V1_DONE, CONTROL), + DEVLINK_TRAP(IPV4_DHCP, CONTROL), + DEVLINK_TRAP(IPV6_DHCP, CONTROL), + DEVLINK_TRAP(ARP_REQUEST, CONTROL), + DEVLINK_TRAP(ARP_RESPONSE, CONTROL), + DEVLINK_TRAP(ARP_OVERLAY, CONTROL), + DEVLINK_TRAP(IPV6_NEIGH_SOLICIT, CONTROL), + DEVLINK_TRAP(IPV6_NEIGH_ADVERT, CONTROL), + DEVLINK_TRAP(IPV4_BFD, CONTROL), + DEVLINK_TRAP(IPV6_BFD, CONTROL), + DEVLINK_TRAP(IPV4_OSPF, CONTROL), + DEVLINK_TRAP(IPV6_OSPF, CONTROL), + DEVLINK_TRAP(IPV4_BGP, CONTROL), + DEVLINK_TRAP(IPV6_BGP, CONTROL), + DEVLINK_TRAP(IPV4_VRRP, CONTROL), + DEVLINK_TRAP(IPV6_VRRP, CONTROL), + DEVLINK_TRAP(IPV4_PIM, CONTROL), + DEVLINK_TRAP(IPV6_PIM, CONTROL), + DEVLINK_TRAP(UC_LB, CONTROL), + DEVLINK_TRAP(LOCAL_ROUTE, CONTROL), + DEVLINK_TRAP(EXTERNAL_ROUTE, CONTROL), + DEVLINK_TRAP(IPV6_UC_DIP_LINK_LOCAL_SCOPE, CONTROL), + DEVLINK_TRAP(IPV6_DIP_ALL_NODES, CONTROL), + DEVLINK_TRAP(IPV6_DIP_ALL_ROUTERS, CONTROL), + DEVLINK_TRAP(IPV6_ROUTER_SOLICIT, CONTROL), + DEVLINK_TRAP(IPV6_ROUTER_ADVERT, CONTROL), + DEVLINK_TRAP(IPV6_REDIRECT, CONTROL), + DEVLINK_TRAP(IPV4_ROUTER_ALERT, CONTROL), + DEVLINK_TRAP(IPV6_ROUTER_ALERT, CONTROL), + DEVLINK_TRAP(PTP_EVENT, CONTROL), + DEVLINK_TRAP(PTP_GENERAL, CONTROL), + DEVLINK_TRAP(FLOW_ACTION_SAMPLE, CONTROL), + DEVLINK_TRAP(FLOW_ACTION_TRAP, CONTROL), + DEVLINK_TRAP(EARLY_DROP, DROP), + DEVLINK_TRAP(VXLAN_PARSING, DROP), + DEVLINK_TRAP(LLC_SNAP_PARSING, DROP), + DEVLINK_TRAP(VLAN_PARSING, DROP), + DEVLINK_TRAP(PPPOE_PPP_PARSING, DROP), + DEVLINK_TRAP(MPLS_PARSING, DROP), + DEVLINK_TRAP(ARP_PARSING, DROP), + DEVLINK_TRAP(IP_1_PARSING, DROP), + DEVLINK_TRAP(IP_N_PARSING, DROP), + DEVLINK_TRAP(GRE_PARSING, DROP), + DEVLINK_TRAP(UDP_PARSING, DROP), + DEVLINK_TRAP(TCP_PARSING, DROP), + DEVLINK_TRAP(IPSEC_PARSING, DROP), + DEVLINK_TRAP(SCTP_PARSING, DROP), + DEVLINK_TRAP(DCCP_PARSING, DROP), + DEVLINK_TRAP(GTP_PARSING, DROP), + DEVLINK_TRAP(ESP_PARSING, DROP), + DEVLINK_TRAP(BLACKHOLE_NEXTHOP, DROP), + DEVLINK_TRAP(DMAC_FILTER, DROP), + DEVLINK_TRAP(EAPOL, CONTROL), + DEVLINK_TRAP(LOCKED_PORT, DROP), +}; + +#define DEVLINK_TRAP_GROUP(_id) \ + { \ + .id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \ + .name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \ + } + +static const struct devlink_trap_group devlink_trap_group_generic[] = { + DEVLINK_TRAP_GROUP(L2_DROPS), + DEVLINK_TRAP_GROUP(L3_DROPS), + DEVLINK_TRAP_GROUP(L3_EXCEPTIONS), + DEVLINK_TRAP_GROUP(BUFFER_DROPS), + DEVLINK_TRAP_GROUP(TUNNEL_DROPS), + DEVLINK_TRAP_GROUP(ACL_DROPS), + DEVLINK_TRAP_GROUP(STP), + DEVLINK_TRAP_GROUP(LACP), + DEVLINK_TRAP_GROUP(LLDP), + DEVLINK_TRAP_GROUP(MC_SNOOPING), + DEVLINK_TRAP_GROUP(DHCP), + DEVLINK_TRAP_GROUP(NEIGH_DISCOVERY), + DEVLINK_TRAP_GROUP(BFD), + DEVLINK_TRAP_GROUP(OSPF), + DEVLINK_TRAP_GROUP(BGP), + DEVLINK_TRAP_GROUP(VRRP), + DEVLINK_TRAP_GROUP(PIM), + DEVLINK_TRAP_GROUP(UC_LB), + DEVLINK_TRAP_GROUP(LOCAL_DELIVERY), + DEVLINK_TRAP_GROUP(EXTERNAL_DELIVERY), + DEVLINK_TRAP_GROUP(IPV6), + DEVLINK_TRAP_GROUP(PTP_EVENT), + DEVLINK_TRAP_GROUP(PTP_GENERAL), + DEVLINK_TRAP_GROUP(ACL_SAMPLE), + DEVLINK_TRAP_GROUP(ACL_TRAP), + DEVLINK_TRAP_GROUP(PARSER_ERROR_DROPS), + DEVLINK_TRAP_GROUP(EAPOL), +}; + +static int devlink_trap_generic_verify(const struct devlink_trap *trap) +{ + if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX) + return -EINVAL; + + if (strcmp(trap->name, devlink_trap_generic[trap->id].name)) + return -EINVAL; + + if (trap->type != devlink_trap_generic[trap->id].type) + return -EINVAL; + + return 0; +} + +static int devlink_trap_driver_verify(const struct devlink_trap *trap) +{ + int i; + + if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) { + if (!strcmp(trap->name, devlink_trap_generic[i].name)) + return -EEXIST; + } + + return 0; +} + +static int devlink_trap_verify(const struct devlink_trap *trap) +{ + if (!trap || !trap->name) + return -EINVAL; + + if (trap->generic) + return devlink_trap_generic_verify(trap); + else + return devlink_trap_driver_verify(trap); +} + +static int +devlink_trap_group_generic_verify(const struct devlink_trap_group *group) +{ + if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX) + return -EINVAL; + + if (strcmp(group->name, devlink_trap_group_generic[group->id].name)) + return -EINVAL; + + return 0; +} + +static int +devlink_trap_group_driver_verify(const struct devlink_trap_group *group) +{ + int i; + + if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) { + if (!strcmp(group->name, devlink_trap_group_generic[i].name)) + return -EEXIST; + } + + return 0; +} + +static int devlink_trap_group_verify(const struct devlink_trap_group *group) +{ + if (group->generic) + return devlink_trap_group_generic_verify(group); + else + return devlink_trap_group_driver_verify(group); +} + +static void +devlink_trap_group_notify(struct devlink *devlink, + const struct devlink_trap_group_item *group_item, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW && + cmd != DEVLINK_CMD_TRAP_GROUP_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0, + 0); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int +devlink_trap_item_group_link(struct devlink *devlink, + struct devlink_trap_item *trap_item) +{ + u16 group_id = trap_item->trap->init_group_id; + struct devlink_trap_group_item *group_item; + + group_item = devlink_trap_group_item_lookup_by_id(devlink, group_id); + if (WARN_ON_ONCE(!group_item)) + return -EINVAL; + + trap_item->group_item = group_item; + + return 0; +} + +static void devlink_trap_notify(struct devlink *devlink, + const struct devlink_trap_item *trap_item, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW && + cmd != DEVLINK_CMD_TRAP_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int +devlink_trap_register(struct devlink *devlink, + const struct devlink_trap *trap, void *priv) +{ + struct devlink_trap_item *trap_item; + int err; + + if (devlink_trap_item_lookup(devlink, trap->name)) + return -EEXIST; + + trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL); + if (!trap_item) + return -ENOMEM; + + trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats); + if (!trap_item->stats) { + err = -ENOMEM; + goto err_stats_alloc; + } + + trap_item->trap = trap; + trap_item->action = trap->init_action; + trap_item->priv = priv; + + err = devlink_trap_item_group_link(devlink, trap_item); + if (err) + goto err_group_link; + + err = devlink->ops->trap_init(devlink, trap, trap_item); + if (err) + goto err_trap_init; + + list_add_tail(&trap_item->list, &devlink->trap_list); + devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW); + + return 0; + +err_trap_init: +err_group_link: + free_percpu(trap_item->stats); +err_stats_alloc: + kfree(trap_item); + return err; +} + +static void devlink_trap_unregister(struct devlink *devlink, + const struct devlink_trap *trap) +{ + struct devlink_trap_item *trap_item; + + trap_item = devlink_trap_item_lookup(devlink, trap->name); + if (WARN_ON_ONCE(!trap_item)) + return; + + devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL); + list_del(&trap_item->list); + if (devlink->ops->trap_fini) + devlink->ops->trap_fini(devlink, trap, trap_item); + free_percpu(trap_item->stats); + kfree(trap_item); +} + +static void devlink_trap_disable(struct devlink *devlink, + const struct devlink_trap *trap) +{ + struct devlink_trap_item *trap_item; + + trap_item = devlink_trap_item_lookup(devlink, trap->name); + if (WARN_ON_ONCE(!trap_item)) + return; + + devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP, + NULL); + trap_item->action = DEVLINK_TRAP_ACTION_DROP; +} + +/** + * devl_traps_register - Register packet traps with devlink. + * @devlink: devlink. + * @traps: Packet traps. + * @traps_count: Count of provided packet traps. + * @priv: Driver private information. + * + * Return: Non-zero value on failure. + */ +int devl_traps_register(struct devlink *devlink, + const struct devlink_trap *traps, + size_t traps_count, void *priv) +{ + int i, err; + + if (!devlink->ops->trap_init || !devlink->ops->trap_action_set) + return -EINVAL; + + devl_assert_locked(devlink); + for (i = 0; i < traps_count; i++) { + const struct devlink_trap *trap = &traps[i]; + + err = devlink_trap_verify(trap); + if (err) + goto err_trap_verify; + + err = devlink_trap_register(devlink, trap, priv); + if (err) + goto err_trap_register; + } + + return 0; + +err_trap_register: +err_trap_verify: + for (i--; i >= 0; i--) + devlink_trap_unregister(devlink, &traps[i]); + return err; +} +EXPORT_SYMBOL_GPL(devl_traps_register); + +/** + * devlink_traps_register - Register packet traps with devlink. + * @devlink: devlink. + * @traps: Packet traps. + * @traps_count: Count of provided packet traps. + * @priv: Driver private information. + * + * Context: Takes and release devlink->lock <mutex>. + * + * Return: Non-zero value on failure. + */ +int devlink_traps_register(struct devlink *devlink, + const struct devlink_trap *traps, + size_t traps_count, void *priv) +{ + int err; + + devl_lock(devlink); + err = devl_traps_register(devlink, traps, traps_count, priv); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_traps_register); + +/** + * devl_traps_unregister - Unregister packet traps from devlink. + * @devlink: devlink. + * @traps: Packet traps. + * @traps_count: Count of provided packet traps. + */ +void devl_traps_unregister(struct devlink *devlink, + const struct devlink_trap *traps, + size_t traps_count) +{ + int i; + + devl_assert_locked(devlink); + /* Make sure we do not have any packets in-flight while unregistering + * traps by disabling all of them and waiting for a grace period. + */ + for (i = traps_count - 1; i >= 0; i--) + devlink_trap_disable(devlink, &traps[i]); + synchronize_rcu(); + for (i = traps_count - 1; i >= 0; i--) + devlink_trap_unregister(devlink, &traps[i]); +} +EXPORT_SYMBOL_GPL(devl_traps_unregister); + +/** + * devlink_traps_unregister - Unregister packet traps from devlink. + * @devlink: devlink. + * @traps: Packet traps. + * @traps_count: Count of provided packet traps. + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_traps_unregister(struct devlink *devlink, + const struct devlink_trap *traps, + size_t traps_count) +{ + devl_lock(devlink); + devl_traps_unregister(devlink, traps, traps_count); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_traps_unregister); + +static void +devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats, + size_t skb_len) +{ + struct devlink_stats *stats; + + stats = this_cpu_ptr(trap_stats); + u64_stats_update_begin(&stats->syncp); + u64_stats_add(&stats->rx_bytes, skb_len); + u64_stats_inc(&stats->rx_packets); + u64_stats_update_end(&stats->syncp); +} + +static void +devlink_trap_report_metadata_set(struct devlink_trap_metadata *metadata, + const struct devlink_trap_item *trap_item, + struct devlink_port *in_devlink_port, + const struct flow_action_cookie *fa_cookie) +{ + metadata->trap_name = trap_item->trap->name; + metadata->trap_group_name = trap_item->group_item->group->name; + metadata->fa_cookie = fa_cookie; + metadata->trap_type = trap_item->trap->type; + + spin_lock(&in_devlink_port->type_lock); + if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH) + metadata->input_dev = in_devlink_port->type_eth.netdev; + spin_unlock(&in_devlink_port->type_lock); +} + +/** + * devlink_trap_report - Report trapped packet to drop monitor. + * @devlink: devlink. + * @skb: Trapped packet. + * @trap_ctx: Trap context. + * @in_devlink_port: Input devlink port. + * @fa_cookie: Flow action cookie. Could be NULL. + */ +void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb, + void *trap_ctx, struct devlink_port *in_devlink_port, + const struct flow_action_cookie *fa_cookie) + +{ + struct devlink_trap_item *trap_item = trap_ctx; + + devlink_trap_stats_update(trap_item->stats, skb->len); + devlink_trap_stats_update(trap_item->group_item->stats, skb->len); + + if (trace_devlink_trap_report_enabled()) { + struct devlink_trap_metadata metadata = {}; + + devlink_trap_report_metadata_set(&metadata, trap_item, + in_devlink_port, fa_cookie); + trace_devlink_trap_report(devlink, skb, &metadata); + } +} +EXPORT_SYMBOL_GPL(devlink_trap_report); + +/** + * devlink_trap_ctx_priv - Trap context to driver private information. + * @trap_ctx: Trap context. + * + * Return: Driver private information passed during registration. + */ +void *devlink_trap_ctx_priv(void *trap_ctx) +{ + struct devlink_trap_item *trap_item = trap_ctx; + + return trap_item->priv; +} +EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv); + +static int +devlink_trap_group_item_policer_link(struct devlink *devlink, + struct devlink_trap_group_item *group_item) +{ + u32 policer_id = group_item->group->init_policer_id; + struct devlink_trap_policer_item *policer_item; + + if (policer_id == 0) + return 0; + + policer_item = devlink_trap_policer_item_lookup(devlink, policer_id); + if (WARN_ON_ONCE(!policer_item)) + return -EINVAL; + + group_item->policer_item = policer_item; + + return 0; +} + +static int +devlink_trap_group_register(struct devlink *devlink, + const struct devlink_trap_group *group) +{ + struct devlink_trap_group_item *group_item; + int err; + + if (devlink_trap_group_item_lookup(devlink, group->name)) + return -EEXIST; + + group_item = kzalloc(sizeof(*group_item), GFP_KERNEL); + if (!group_item) + return -ENOMEM; + + group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats); + if (!group_item->stats) { + err = -ENOMEM; + goto err_stats_alloc; + } + + group_item->group = group; + + err = devlink_trap_group_item_policer_link(devlink, group_item); + if (err) + goto err_policer_link; + + if (devlink->ops->trap_group_init) { + err = devlink->ops->trap_group_init(devlink, group); + if (err) + goto err_group_init; + } + + list_add_tail(&group_item->list, &devlink->trap_group_list); + devlink_trap_group_notify(devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_NEW); + + return 0; + +err_group_init: +err_policer_link: + free_percpu(group_item->stats); +err_stats_alloc: + kfree(group_item); + return err; +} + +static void +devlink_trap_group_unregister(struct devlink *devlink, + const struct devlink_trap_group *group) +{ + struct devlink_trap_group_item *group_item; + + group_item = devlink_trap_group_item_lookup(devlink, group->name); + if (WARN_ON_ONCE(!group_item)) + return; + + devlink_trap_group_notify(devlink, group_item, + DEVLINK_CMD_TRAP_GROUP_DEL); + list_del(&group_item->list); + free_percpu(group_item->stats); + kfree(group_item); +} + +/** + * devl_trap_groups_register - Register packet trap groups with devlink. + * @devlink: devlink. + * @groups: Packet trap groups. + * @groups_count: Count of provided packet trap groups. + * + * Return: Non-zero value on failure. + */ +int devl_trap_groups_register(struct devlink *devlink, + const struct devlink_trap_group *groups, + size_t groups_count) +{ + int i, err; + + devl_assert_locked(devlink); + for (i = 0; i < groups_count; i++) { + const struct devlink_trap_group *group = &groups[i]; + + err = devlink_trap_group_verify(group); + if (err) + goto err_trap_group_verify; + + err = devlink_trap_group_register(devlink, group); + if (err) + goto err_trap_group_register; + } + + return 0; + +err_trap_group_register: +err_trap_group_verify: + for (i--; i >= 0; i--) + devlink_trap_group_unregister(devlink, &groups[i]); + return err; +} +EXPORT_SYMBOL_GPL(devl_trap_groups_register); + +/** + * devlink_trap_groups_register - Register packet trap groups with devlink. + * @devlink: devlink. + * @groups: Packet trap groups. + * @groups_count: Count of provided packet trap groups. + * + * Context: Takes and release devlink->lock <mutex>. + * + * Return: Non-zero value on failure. + */ +int devlink_trap_groups_register(struct devlink *devlink, + const struct devlink_trap_group *groups, + size_t groups_count) +{ + int err; + + devl_lock(devlink); + err = devl_trap_groups_register(devlink, groups, groups_count); + devl_unlock(devlink); + return err; +} +EXPORT_SYMBOL_GPL(devlink_trap_groups_register); + +/** + * devl_trap_groups_unregister - Unregister packet trap groups from devlink. + * @devlink: devlink. + * @groups: Packet trap groups. + * @groups_count: Count of provided packet trap groups. + */ +void devl_trap_groups_unregister(struct devlink *devlink, + const struct devlink_trap_group *groups, + size_t groups_count) +{ + int i; + + devl_assert_locked(devlink); + for (i = groups_count - 1; i >= 0; i--) + devlink_trap_group_unregister(devlink, &groups[i]); +} +EXPORT_SYMBOL_GPL(devl_trap_groups_unregister); + +/** + * devlink_trap_groups_unregister - Unregister packet trap groups from devlink. + * @devlink: devlink. + * @groups: Packet trap groups. + * @groups_count: Count of provided packet trap groups. + * + * Context: Takes and release devlink->lock <mutex>. + */ +void devlink_trap_groups_unregister(struct devlink *devlink, + const struct devlink_trap_group *groups, + size_t groups_count) +{ + devl_lock(devlink); + devl_trap_groups_unregister(devlink, groups, groups_count); + devl_unlock(devlink); +} +EXPORT_SYMBOL_GPL(devlink_trap_groups_unregister); + +static void +devlink_trap_policer_notify(struct devlink *devlink, + const struct devlink_trap_policer_item *policer_item, + enum devlink_command cmd) +{ + struct sk_buff *msg; + int err; + + WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW && + cmd != DEVLINK_CMD_TRAP_POLICER_DEL); + if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED)) + return; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + err = devlink_nl_trap_policer_fill(msg, devlink, policer_item, cmd, 0, + 0, 0); + if (err) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), + msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL); +} + +static int +devlink_trap_policer_register(struct devlink *devlink, + const struct devlink_trap_policer *policer) +{ + struct devlink_trap_policer_item *policer_item; + int err; + + if (devlink_trap_policer_item_lookup(devlink, policer->id)) + return -EEXIST; + + policer_item = kzalloc(sizeof(*policer_item), GFP_KERNEL); + if (!policer_item) + return -ENOMEM; + + policer_item->policer = policer; + policer_item->rate = policer->init_rate; + policer_item->burst = policer->init_burst; + + if (devlink->ops->trap_policer_init) { + err = devlink->ops->trap_policer_init(devlink, policer); + if (err) + goto err_policer_init; + } + + list_add_tail(&policer_item->list, &devlink->trap_policer_list); + devlink_trap_policer_notify(devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_NEW); + + return 0; + +err_policer_init: + kfree(policer_item); + return err; +} + +static void +devlink_trap_policer_unregister(struct devlink *devlink, + const struct devlink_trap_policer *policer) +{ + struct devlink_trap_policer_item *policer_item; + + policer_item = devlink_trap_policer_item_lookup(devlink, policer->id); + if (WARN_ON_ONCE(!policer_item)) + return; + + devlink_trap_policer_notify(devlink, policer_item, + DEVLINK_CMD_TRAP_POLICER_DEL); + list_del(&policer_item->list); + if (devlink->ops->trap_policer_fini) + devlink->ops->trap_policer_fini(devlink, policer); + kfree(policer_item); +} + +/** + * devl_trap_policers_register - Register packet trap policers with devlink. + * @devlink: devlink. + * @policers: Packet trap policers. + * @policers_count: Count of provided packet trap policers. + * + * Return: Non-zero value on failure. + */ +int +devl_trap_policers_register(struct devlink *devlink, + const struct devlink_trap_policer *policers, + size_t policers_count) +{ + int i, err; + + devl_assert_locked(devlink); + for (i = 0; i < policers_count; i++) { + const struct devlink_trap_policer *policer = &policers[i]; + + if (WARN_ON(policer->id == 0 || + policer->max_rate < policer->min_rate || + policer->max_burst < policer->min_burst)) { + err = -EINVAL; + goto err_trap_policer_verify; + } + + err = devlink_trap_policer_register(devlink, policer); + if (err) + goto err_trap_policer_register; + } + return 0; + +err_trap_policer_register: +err_trap_policer_verify: + for (i--; i >= 0; i--) + devlink_trap_policer_unregister(devlink, &policers[i]); + return err; +} +EXPORT_SYMBOL_GPL(devl_trap_policers_register); + +/** + * devl_trap_policers_unregister - Unregister packet trap policers from devlink. + * @devlink: devlink. + * @policers: Packet trap policers. + * @policers_count: Count of provided packet trap policers. + */ +void +devl_trap_policers_unregister(struct devlink *devlink, + const struct devlink_trap_policer *policers, + size_t policers_count) +{ + int i; + + devl_assert_locked(devlink); + for (i = policers_count - 1; i >= 0; i--) + devlink_trap_policer_unregister(devlink, &policers[i]); +} +EXPORT_SYMBOL_GPL(devl_trap_policers_unregister); + +int devlink_compat_phys_port_name_get(struct net_device *dev, + char *name, size_t len) +{ + struct devlink_port *devlink_port; + + /* RTNL mutex is held here which ensures that devlink_port + * instance cannot disappear in the middle. No need to take + * any devlink lock as only permanent values are accessed. + */ + ASSERT_RTNL(); + + devlink_port = dev->devlink_port; + if (!devlink_port) + return -EOPNOTSUPP; + + return __devlink_port_phys_port_name_get(devlink_port, name, len); +} + +int devlink_compat_switch_id_get(struct net_device *dev, + struct netdev_phys_item_id *ppid) +{ + struct devlink_port *devlink_port; + + /* Caller must hold RTNL mutex or reference to dev, which ensures that + * devlink_port instance cannot disappear in the middle. No need to take + * any devlink lock as only permanent values are accessed. + */ + devlink_port = dev->devlink_port; + if (!devlink_port || !devlink_port->switch_port) + return -EOPNOTSUPP; + + memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid)); + + return 0; +} |