diff options
author | Anish Bhatt <anish@chelsio.com> | 2014-07-17 00:18:17 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2014-07-17 16:06:03 -0700 |
commit | fc8d0590d9142d01e4ccea3aa57c894bd6e53662 (patch) | |
tree | 870cc3db68da24e1216954ec4e37cf9f8ad72c85 /drivers/scsi/cxgbi/libcxgbi.c | |
parent | a3e3b2857d35988819bc396c012c53898b8223e6 (diff) |
libcxgbi: Add ipv6 api to driver
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: Manoj Malviya <manojmalviya@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/scsi/cxgbi/libcxgbi.c')
-rw-r--r-- | drivers/scsi/cxgbi/libcxgbi.c | 237 |
1 files changed, 218 insertions, 19 deletions
diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c index b44c1cff3114..d2fe507fc695 100644 --- a/drivers/scsi/cxgbi/libcxgbi.c +++ b/drivers/scsi/cxgbi/libcxgbi.c @@ -24,6 +24,10 @@ #include <linux/inet.h> #include <net/dst.h> #include <net/route.h> +#include <net/ipv6.h> +#include <net/ip6_route.h> +#include <net/addrconf.h> + #include <linux/inetdevice.h> /* ip_dev_find */ #include <linux/module.h> #include <net/tcp.h> @@ -193,8 +197,8 @@ struct cxgbi_device *cxgbi_device_find_by_lldev(void *lldev) } EXPORT_SYMBOL_GPL(cxgbi_device_find_by_lldev); -static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, - int *port) +struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, + int *port) { struct net_device *vdev = NULL; struct cxgbi_device *cdev, *tmp; @@ -224,6 +228,40 @@ static struct cxgbi_device *cxgbi_device_find_by_netdev(struct net_device *ndev, "ndev 0x%p, %s, NO match found.\n", ndev, ndev->name); return NULL; } +EXPORT_SYMBOL_GPL(cxgbi_device_find_by_netdev); + +static struct cxgbi_device *cxgbi_device_find_by_mac(struct net_device *ndev, + int *port) +{ + struct net_device *vdev = NULL; + struct cxgbi_device *cdev, *tmp; + int i; + + if (ndev->priv_flags & IFF_802_1Q_VLAN) { + vdev = ndev; + ndev = vlan_dev_real_dev(ndev); + pr_info("vlan dev %s -> %s.\n", vdev->name, ndev->name); + } + + mutex_lock(&cdev_mutex); + list_for_each_entry_safe(cdev, tmp, &cdev_list, list_head) { + for (i = 0; i < cdev->nports; i++) { + if (!memcmp(ndev->dev_addr, cdev->ports[i]->dev_addr, + MAX_ADDR_LEN)) { + cdev->hbas[i]->vdev = vdev; + mutex_unlock(&cdev_mutex); + if (port) + *port = i; + return cdev; + } + } + } + mutex_unlock(&cdev_mutex); + log_debug(1 << CXGBI_DBG_DEV, + "ndev 0x%p, %s, NO match mac found.\n", + ndev, ndev->name); + return NULL; +} void cxgbi_hbas_remove(struct cxgbi_device *cdev) { @@ -320,6 +358,7 @@ static int sock_get_port(struct cxgbi_sock *csk) struct cxgbi_ports_map *pmap = &cdev->pmap; unsigned int start; int idx; + __be16 *port; if (!pmap->max_connect) { pr_err("cdev 0x%p, p#%u %s, NO port map.\n", @@ -327,9 +366,14 @@ static int sock_get_port(struct cxgbi_sock *csk) return -EADDRNOTAVAIL; } - if (csk->saddr.sin_port) { + if (csk->csk_family == AF_INET) + port = &csk->saddr.sin_port; + else /* ipv6 */ + port = &csk->saddr6.sin6_port; + + if (*port) { pr_err("source port NON-ZERO %u.\n", - ntohs(csk->saddr.sin_port)); + ntohs(*port)); return -EADDRINUSE; } @@ -347,8 +391,7 @@ static int sock_get_port(struct cxgbi_sock *csk) idx = 0; if (!pmap->port_csk[idx]) { pmap->used++; - csk->saddr.sin_port = - htons(pmap->sport_base + idx); + *port = htons(pmap->sport_base + idx); pmap->next = idx; pmap->port_csk[idx] = csk; spin_unlock_bh(&pmap->lock); @@ -374,16 +417,22 @@ static void sock_put_port(struct cxgbi_sock *csk) { struct cxgbi_device *cdev = csk->cdev; struct cxgbi_ports_map *pmap = &cdev->pmap; + __be16 *port; - if (csk->saddr.sin_port) { - int idx = ntohs(csk->saddr.sin_port) - pmap->sport_base; + if (csk->csk_family == AF_INET) + port = &csk->saddr.sin_port; + else /* ipv6 */ + port = &csk->saddr6.sin6_port; - csk->saddr.sin_port = 0; + if (*port) { + int idx = ntohs(*port) - pmap->sport_base; + + *port = 0; if (idx < 0 || idx >= pmap->max_connect) { pr_err("cdev 0x%p, p#%u %s, port %u OOR.\n", cdev, csk->port_id, cdev->ports[csk->port_id]->name, - ntohs(csk->saddr.sin_port)); + ntohs(*port)); return; } @@ -479,17 +528,11 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr) int port = 0xFFFF; int err = 0; - if (daddr->sin_family != AF_INET) { - pr_info("address family 0x%x NOT supported.\n", - daddr->sin_family); - err = -EAFNOSUPPORT; - goto err_out; - } - rt = find_route_ipv4(&fl4, 0, daddr->sin_addr.s_addr, 0, daddr->sin_port, 0); if (!rt) { pr_info("no route to ipv4 0x%x, port %u.\n", - daddr->sin_addr.s_addr, daddr->sin_port); + be32_to_cpu(daddr->sin_addr.s_addr), + be16_to_cpu(daddr->sin_port)); err = -ENETUNREACH; goto err_out; } @@ -537,9 +580,12 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr) csk->port_id = port; csk->mtu = mtu; csk->dst = dst; + + csk->csk_family = AF_INET; csk->daddr.sin_addr.s_addr = daddr->sin_addr.s_addr; csk->daddr.sin_port = daddr->sin_port; csk->daddr.sin_family = daddr->sin_family; + csk->saddr.sin_family = daddr->sin_family; csk->saddr.sin_addr.s_addr = fl4.saddr; neigh_release(n); @@ -556,6 +602,121 @@ err_out: return ERR_PTR(err); } +static struct rt6_info *find_route_ipv6(const struct in6_addr *saddr, + const struct in6_addr *daddr) +{ + struct flowi6 fl; + + if (saddr) + memcpy(&fl.saddr, saddr, sizeof(struct in6_addr)); + if (daddr) + memcpy(&fl.daddr, daddr, sizeof(struct in6_addr)); + return (struct rt6_info *)ip6_route_output(&init_net, NULL, &fl); +} + +static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr) +{ + struct sockaddr_in6 *daddr6 = (struct sockaddr_in6 *)dst_addr; + struct dst_entry *dst; + struct net_device *ndev; + struct cxgbi_device *cdev; + struct rt6_info *rt = NULL; + struct neighbour *n; + struct in6_addr pref_saddr; + struct cxgbi_sock *csk = NULL; + unsigned int mtu = 0; + int port = 0xFFFF; + int err = 0; + + rt = find_route_ipv6(NULL, &daddr6->sin6_addr); + + if (!rt) { + pr_info("no route to ipv6 %pI6 port %u\n", + daddr6->sin6_addr.s6_addr, + be16_to_cpu(daddr6->sin6_port)); + err = -ENETUNREACH; + goto err_out; + } + + dst = &rt->dst; + + n = dst_neigh_lookup(dst, &daddr6->sin6_addr); + + if (!n) { + pr_info("%pI6, port %u, dst no neighbour.\n", + daddr6->sin6_addr.s6_addr, + be16_to_cpu(daddr6->sin6_port)); + err = -ENETUNREACH; + goto rel_rt; + } + ndev = n->dev; + + if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { + pr_info("multi-cast route %pI6 port %u, dev %s.\n", + daddr6->sin6_addr.s6_addr, + ntohs(daddr6->sin6_port), ndev->name); + err = -ENETUNREACH; + goto rel_rt; + } + + cdev = cxgbi_device_find_by_netdev(ndev, &port); + if (!cdev) + cdev = cxgbi_device_find_by_mac(ndev, &port); + if (!cdev) { + pr_info("dst %pI6 %s, NOT cxgbi device.\n", + daddr6->sin6_addr.s6_addr, ndev->name); + err = -ENETUNREACH; + goto rel_rt; + } + log_debug(1 << CXGBI_DBG_SOCK, + "route to %pI6 :%u, ndev p#%d,%s, cdev 0x%p.\n", + daddr6->sin6_addr.s6_addr, ntohs(daddr6->sin6_port), port, + ndev->name, cdev); + + csk = cxgbi_sock_create(cdev); + if (!csk) { + err = -ENOMEM; + goto rel_rt; + } + csk->cdev = cdev; + csk->port_id = port; + csk->mtu = mtu; + csk->dst = dst; + + if (ipv6_addr_any(&rt->rt6i_prefsrc.addr)) { + struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt); + + err = ipv6_dev_get_saddr(&init_net, idev ? idev->dev : NULL, + &daddr6->sin6_addr, 0, &pref_saddr); + if (err) { + pr_info("failed to get source address to reach %pI6\n", + &daddr6->sin6_addr); + goto rel_rt; + } + } else { + pref_saddr = rt->rt6i_prefsrc.addr; + } + + csk->csk_family = AF_INET6; + csk->daddr6.sin6_addr = daddr6->sin6_addr; + csk->daddr6.sin6_port = daddr6->sin6_port; + csk->daddr6.sin6_family = daddr6->sin6_family; + csk->saddr6.sin6_addr = pref_saddr; + + neigh_release(n); + return csk; + +rel_rt: + if (n) + neigh_release(n); + + ip6_rt_put(rt); + if (csk) + cxgbi_sock_closed(csk); +err_out: + return ERR_PTR(err); +} + void cxgbi_sock_established(struct cxgbi_sock *csk, unsigned int snd_isn, unsigned int opt) { @@ -2194,6 +2355,34 @@ int cxgbi_set_conn_param(struct iscsi_cls_conn *cls_conn, } EXPORT_SYMBOL_GPL(cxgbi_set_conn_param); +static inline int csk_print_port(struct cxgbi_sock *csk, char *buf) +{ + int len; + + cxgbi_sock_get(csk); + len = sprintf(buf, "%hu\n", ntohs(csk->daddr.sin_port)); + cxgbi_sock_put(csk); + + return len; +} + +static inline int csk_print_ip(struct cxgbi_sock *csk, char *buf) +{ + int len; + + cxgbi_sock_get(csk); + if (csk->csk_family == AF_INET) + len = sprintf(buf, "%pI4", + &csk->daddr.sin_addr.s_addr); + else + len = sprintf(buf, "%pI6", + &csk->daddr6.sin6_addr); + + cxgbi_sock_put(csk); + + return len; +} + int cxgbi_get_ep_param(struct iscsi_endpoint *ep, enum iscsi_param param, char *buf) { @@ -2447,7 +2636,17 @@ struct iscsi_endpoint *cxgbi_ep_connect(struct Scsi_Host *shost, } } - csk = cxgbi_check_route(dst_addr); + if (dst_addr->sa_family == AF_INET) { + csk = cxgbi_check_route(dst_addr); + } else if (dst_addr->sa_family == AF_INET6) { + csk = cxgbi_check_route6(dst_addr); + } else { + pr_info("address family 0x%x NOT supported.\n", + dst_addr->sa_family); + err = -EAFNOSUPPORT; + return (struct iscsi_endpoint *)ERR_PTR(err); + } + if (IS_ERR(csk)) return (struct iscsi_endpoint *)csk; cxgbi_sock_get(csk); |