From 3b261ade4224852ed841ecfd13876db812846e96 Mon Sep 17 00:00:00 2001 From: Amerigo Wang Date: Tue, 22 Mar 2011 01:59:47 +0000 Subject: net: remove useless comments in net/core/dev.c The code itself can explain what it is doing, no need these comments. Signed-off-by: WANG Cong Signed-off-by: David S. Miller --- net/core/dev.c | 54 ------------------------------------------------------ 1 file changed, 54 deletions(-) (limited to 'net/core') diff --git a/net/core/dev.c b/net/core/dev.c index f453370131a0..9b23dcefae6c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1140,9 +1140,6 @@ static int __dev_open(struct net_device *dev) ASSERT_RTNL(); - /* - * Is it even present? - */ if (!netif_device_present(dev)) return -ENODEV; @@ -1151,9 +1148,6 @@ static int __dev_open(struct net_device *dev) if (ret) return ret; - /* - * Call device private open method - */ set_bit(__LINK_STATE_START, &dev->state); if (ops->ndo_validate_addr) @@ -1162,31 +1156,12 @@ static int __dev_open(struct net_device *dev) if (!ret && ops->ndo_open) ret = ops->ndo_open(dev); - /* - * If it went open OK then: - */ - if (ret) clear_bit(__LINK_STATE_START, &dev->state); else { - /* - * Set the flags. - */ dev->flags |= IFF_UP; - - /* - * Enable NET_DMA - */ net_dmaengine_get(); - - /* - * Initialize multicasting status - */ dev_set_rx_mode(dev); - - /* - * Wakeup transmit queue engine - */ dev_activate(dev); } @@ -1209,22 +1184,13 @@ int dev_open(struct net_device *dev) { int ret; - /* - * Is it already up? - */ if (dev->flags & IFF_UP) return 0; - /* - * Open device - */ ret = __dev_open(dev); if (ret < 0) return ret; - /* - * ... and announce new interface. - */ rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); call_netdevice_notifiers(NETDEV_UP, dev); @@ -1240,10 +1206,6 @@ static int __dev_close_many(struct list_head *head) might_sleep(); list_for_each_entry(dev, head, unreg_list) { - /* - * Tell people we are going down, so that they can - * prepare to death, when device is still operating. - */ call_netdevice_notifiers(NETDEV_GOING_DOWN, dev); clear_bit(__LINK_STATE_START, &dev->state); @@ -1272,15 +1234,7 @@ static int __dev_close_many(struct list_head *head) if (ops->ndo_stop) ops->ndo_stop(dev); - /* - * Device is now down. - */ - dev->flags &= ~IFF_UP; - - /* - * Shutdown NET_DMA - */ net_dmaengine_put(); } @@ -1309,9 +1263,6 @@ static int dev_close_many(struct list_head *head) __dev_close_many(head); - /* - * Tell people we are down - */ list_for_each_entry(dev, head, unreg_list) { rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); call_netdevice_notifiers(NETDEV_DOWN, dev); @@ -1371,11 +1322,6 @@ EXPORT_SYMBOL(dev_disable_lro); static int dev_boot_phase = 1; -/* - * Device change register/unregister. These are not inline or static - * as we export them to the world. - */ - /** * register_netdevice_notifier - register a network notifier block * @nb: notifier -- cgit v1.2.3-70-g09d2 From edf947f10074fea27fdb1730524dca59355a1c40 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Thu, 24 Mar 2011 13:24:01 +0000 Subject: bridge: notify applications if address of bridge device changes The mac address of the bridge device may be changed when a new interface is added to the bridge. If this happens, then the bridge needs to call the network notifiers to tickle any other systems that care. Since bridge can be a module, this also means exporting the notifier function. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br_if.c | 6 +++++- net/bridge/br_private.h | 2 +- net/bridge/br_stp_if.c | 9 ++++++--- net/core/dev.c | 1 + 4 files changed, 13 insertions(+), 5 deletions(-) (limited to 'net/core') diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index dce8f0009a12..718b60366dfe 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -389,6 +389,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) { struct net_bridge_port *p; int err = 0; + bool changed_addr; /* Don't allow bridging non-ethernet like devices */ if ((dev->flags & IFF_LOOPBACK) || @@ -446,7 +447,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) list_add_rcu(&p->list, &br->port_list); spin_lock_bh(&br->lock); - br_stp_recalculate_bridge_id(br); + changed_addr = br_stp_recalculate_bridge_id(br); br_features_recompute(br); if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) && @@ -456,6 +457,9 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) br_ifinfo_notify(RTM_NEWLINK, p); + if (changed_addr) + call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); + dev_set_mtu(br->dev, br_min_mtu(br)); kobject_uevent(&p->kobj, KOBJ_ADD); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 19e2f46ed086..387013d33745 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -497,7 +497,7 @@ extern void br_stp_disable_bridge(struct net_bridge *br); extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); extern void br_stp_enable_port(struct net_bridge_port *p); extern void br_stp_disable_port(struct net_bridge_port *p); -extern void br_stp_recalculate_bridge_id(struct net_bridge *br); +extern bool br_stp_recalculate_bridge_id(struct net_bridge *br); extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); extern void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio); diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c index 79372d4a4055..5593f5aec942 100644 --- a/net/bridge/br_stp_if.c +++ b/net/bridge/br_stp_if.c @@ -204,7 +204,7 @@ void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *addr) static const unsigned short br_mac_zero_aligned[ETH_ALEN >> 1]; /* called under bridge lock */ -void br_stp_recalculate_bridge_id(struct net_bridge *br) +bool br_stp_recalculate_bridge_id(struct net_bridge *br) { const unsigned char *br_mac_zero = (const unsigned char *)br_mac_zero_aligned; @@ -222,8 +222,11 @@ void br_stp_recalculate_bridge_id(struct net_bridge *br) } - if (compare_ether_addr(br->bridge_id.addr, addr)) - br_stp_change_bridge_id(br, addr); + if (compare_ether_addr(br->bridge_id.addr, addr) == 0) + return false; /* no change */ + + br_stp_change_bridge_id(br, addr); + return true; } /* called under bridge lock */ diff --git a/net/core/dev.c b/net/core/dev.c index 9b23dcefae6c..563ddc28139d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1423,6 +1423,7 @@ int call_netdevice_notifiers(unsigned long val, struct net_device *dev) ASSERT_RTNL(); return raw_notifier_call_chain(&netdev_chain, val, dev); } +EXPORT_SYMBOL(call_netdevice_notifiers); /* When > 0 there are consumers of rx skb time stamps */ static atomic_t netstamp_needed = ATOMIC_INIT(0); -- cgit v1.2.3-70-g09d2 From 673e63c688f43104c73aad8ea4237f7ad41fa14d Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Tue, 22 Mar 2011 23:54:49 +0000 Subject: net: fix ethtool->set_flags not intended -EINVAL return value After commit d5dbda23804156ae6f35025ade5307a49d1db6d7 "ethtool: Add support for vlan accleration.", drivers that have NETIF_F_HW_VLAN_TX, and/or NETIF_F_HW_VLAN_RX feature, but do not allow enable/disable vlan acceleration via ethtool set_flags, always return -EINVAL from that function. Fix by returning -EINVAL only if requested features do not match current settings and can not be changed by driver. Change any driver that define ethtool->set_flags to use ethtool_invalid_flags() to avoid similar problems in the future (also on drivers that do not have the problem). Tested with modified (to reproduce this bug) myri10ge driver. Cc: stable@kernel.org # 2.6.37+ Signed-off-by: Stanislaw Gruszka Signed-off-by: David S. Miller --- drivers/net/netxen/netxen_nic_ethtool.c | 2 +- drivers/net/qlcnic/qlcnic_ethtool.c | 2 +- drivers/net/s2io.c | 2 +- drivers/net/vmxnet3/vmxnet3_ethtool.c | 4 ++-- drivers/net/vxge/vxge-ethtool.c | 4 ++-- include/linux/ethtool.h | 1 + net/core/ethtool.c | 17 ++++++++++++++++- 7 files changed, 24 insertions(+), 8 deletions(-) (limited to 'net/core') diff --git a/drivers/net/netxen/netxen_nic_ethtool.c b/drivers/net/netxen/netxen_nic_ethtool.c index 653d308e0f5d..3bdcc803ec68 100644 --- a/drivers/net/netxen/netxen_nic_ethtool.c +++ b/drivers/net/netxen/netxen_nic_ethtool.c @@ -871,7 +871,7 @@ static int netxen_nic_set_flags(struct net_device *netdev, u32 data) struct netxen_adapter *adapter = netdev_priv(netdev); int hw_lro; - if (data & ~ETH_FLAG_LRO) + if (ethtool_invalid_flags(netdev, data, ETH_FLAG_LRO)) return -EINVAL; if (!(adapter->capabilities & NX_FW_CAPABILITY_HW_LRO)) diff --git a/drivers/net/qlcnic/qlcnic_ethtool.c b/drivers/net/qlcnic/qlcnic_ethtool.c index 4c14510e2a87..45b2755d6cba 100644 --- a/drivers/net/qlcnic/qlcnic_ethtool.c +++ b/drivers/net/qlcnic/qlcnic_ethtool.c @@ -1003,7 +1003,7 @@ static int qlcnic_set_flags(struct net_device *netdev, u32 data) struct qlcnic_adapter *adapter = netdev_priv(netdev); int hw_lro; - if (data & ~ETH_FLAG_LRO) + if (ethtool_invalid_flags(netdev, data, ETH_FLAG_LRO)) return -EINVAL; if (!(adapter->capabilities & QLCNIC_FW_CAPABILITY_HW_LRO)) diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c index 2ad6364103ea..356e74d20b80 100644 --- a/drivers/net/s2io.c +++ b/drivers/net/s2io.c @@ -6726,7 +6726,7 @@ static int s2io_ethtool_set_flags(struct net_device *dev, u32 data) int rc = 0; int changed = 0; - if (data & ~ETH_FLAG_LRO) + if (ethtool_invalid_flags(dev, data, ETH_FLAG_LRO)) return -EINVAL; if (data & ETH_FLAG_LRO) { diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c index 81254be85b92..51f2ef142a5b 100644 --- a/drivers/net/vmxnet3/vmxnet3_ethtool.c +++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c @@ -304,8 +304,8 @@ vmxnet3_set_flags(struct net_device *netdev, u32 data) u8 lro_present = (netdev->features & NETIF_F_LRO) == 0 ? 0 : 1; unsigned long flags; - if (data & ~ETH_FLAG_LRO) - return -EOPNOTSUPP; + if (ethtool_invalid_flags(netdev, data, ETH_FLAG_LRO)) + return -EINVAL; if (lro_requested ^ lro_present) { /* toggle the LRO feature*/ diff --git a/drivers/net/vxge/vxge-ethtool.c b/drivers/net/vxge/vxge-ethtool.c index 1dd3a21b3a43..c5eb034107fd 100644 --- a/drivers/net/vxge/vxge-ethtool.c +++ b/drivers/net/vxge/vxge-ethtool.c @@ -1117,8 +1117,8 @@ static int vxge_set_flags(struct net_device *dev, u32 data) struct vxgedev *vdev = netdev_priv(dev); enum vxge_hw_status status; - if (data & ~ETH_FLAG_RXHASH) - return -EOPNOTSUPP; + if (ethtool_invalid_flags(dev, data, ETH_FLAG_RXHASH)) + return -EINVAL; if (!!(data & ETH_FLAG_RXHASH) == vdev->devh->config.rth_en) return 0; diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index ae757bcf1280..c8fcbdd2b0e7 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -680,6 +680,7 @@ int ethtool_op_set_ufo(struct net_device *dev, u32 data); u32 ethtool_op_get_flags(struct net_device *dev); int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported); void ethtool_ntuple_flush(struct net_device *dev); +bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported); /** * ðtool_ops - Alter and report network device settings diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 24bd57493c0d..74ead9eca126 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -141,9 +141,24 @@ u32 ethtool_op_get_flags(struct net_device *dev) } EXPORT_SYMBOL(ethtool_op_get_flags); +/* Check if device can enable (or disable) particular feature coded in "data" + * argument. Flags "supported" describe features that can be toggled by device. + * If feature can not be toggled, it state (enabled or disabled) must match + * hardcoded device features state, otherwise flags are marked as invalid. + */ +bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported) +{ + u32 features = dev->features & flags_dup_features; + /* "data" can contain only flags_dup_features bits, + * see __ethtool_set_flags */ + + return (features & ~supported) != (data & ~supported); +} +EXPORT_SYMBOL(ethtool_invalid_flags); + int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported) { - if (data & ~supported) + if (ethtool_invalid_flags(dev, data, supported)) return -EINVAL; dev->features = ((dev->features & ~flags_dup_features) | -- cgit v1.2.3-70-g09d2