From 3019de124b9f5b1526cb3668b74af14371e21795 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 6 Jun 2011 16:41:33 -0700 Subject: net: Rework netdev_drivername() to avoid warning. This interface uses a temporary buffer, but for no real reason. And now can generate warnings like: net/sched/sch_generic.c: In function dev_watchdog net/sched/sch_generic.c:254:10: warning: unused variable drivername Just return driver->name directly or "". Reported-by: Connor Hansen Signed-off-by: David S. Miller --- net/core/dev.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 939307891e71..1af6cb27f67a 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6264,29 +6264,23 @@ err_name: /** * netdev_drivername - network driver for the device * @dev: network device - * @buffer: buffer for resulting name - * @len: size of buffer * * Determine network driver for device. */ -char *netdev_drivername(const struct net_device *dev, char *buffer, int len) +const char *netdev_drivername(const struct net_device *dev) { const struct device_driver *driver; const struct device *parent; - - if (len <= 0 || !buffer) - return buffer; - buffer[0] = 0; + const char *empty = ""; parent = dev->dev.parent; - if (!parent) - return buffer; + return empty; driver = parent->driver; if (driver && driver->name) - strlcpy(buffer, driver->name, len); - return buffer; + return driver->name; + return empty; } static int __netdev_printk(const char *level, const struct net_device *dev, -- cgit v1.2.2 From 264524d5e5195f6e0f099bee20253a22b651e272 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 6 Jun 2011 20:50:03 +0000 Subject: net: cpu offline cause napi stall Frank Blaschka reported : During heavy network load we turn off/on cpus. Sometimes this causes a stall on the network device. Digging into the dump I found out following: napi is scheduled but does not run. From the I/O buffers and the napi state I see napi/rx_softirq processing has stopped because the budget was reached. napi stays in the softnet_data poll_list and the rx_softirq was raised again. I assume at this time the cpu offline comes in, the rx softirq is raised/moved to another cpu but napi stays in the poll_list of the softnet_data of the now offline cpu. Reviewing dev_cpu_callback (net/core/dev.c) I did not find the poll_list is transfered to the new cpu. This patch is a straightforward implementation of Frank suggestion : Transfert poll_list and trigger NET_RX_SOFTIRQ on new cpu. Reported-by: Frank Blaschka Signed-off-by: Heiko Carstens Signed-off-by: Eric Dumazet Tested-by: Eric Dumazet Signed-off-by: David S. Miller --- net/core/dev.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 1af6cb27f67a..a54c9f87ddbb 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6178,6 +6178,11 @@ static int dev_cpu_callback(struct notifier_block *nfb, oldsd->output_queue = NULL; oldsd->output_queue_tailp = &oldsd->output_queue; } + /* Append NAPI poll list from offline CPU. */ + if (!list_empty(&oldsd->poll_list)) { + list_splice_init(&oldsd->poll_list, &sd->poll_list); + raise_softirq_irqoff(NET_RX_SOFTIRQ); + } raise_softirq_irqoff(NET_TX_SOFTIRQ); local_irq_enable(); -- cgit v1.2.2 From bff55273f98dea0ceb78e28eb69462fe5f72ef3d Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Wed, 8 Jun 2011 12:35:08 +0000 Subject: v2 ethtool: remove support for ETHTOOL_GRXNTUPLE This change is meant to remove all support for displaying an ntuple as strings via ETHTOOL_GRXNTUPLE. The reason for this change is due to the fact that multiple issues have been found including: - Multiple buffer overruns for strings being displayed. - Incorrect filters displayed, cleared filters with ring of -2 are displayed - Setting get_rx_ntuple displays no rules if defined. - Endianess wrong on displayed values. - Hard limit of 1024 filters makes display functionality extremely limited The only driver that had supported this interface was ixgbe. Since it no longer uses the interface and due to the issues mentioned above I am submitting this patch to remove it. v2: Updated based on comments from Ben Hutchings - Left ETH_SS_NTUPLE_FILTERS in code but commented on it being deprecated - Removed ethtool_rx_ntuple_list and ethtool_rx_ntuple_flow_spec_container - Left ETHTOOL_GRXNTUPLE but commented it as deprecated Also cleaned up set_rx_ntuple since there is no flow spec container to maintain we can drop all the code for the alloc and free of it and just return ops->set_rx_ntuple(). Signed-off-by: Alexander Duyck Acked-by: Ben Hutchings Signed-off-by: David S. Miller --- net/core/dev.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 939307891e71..b3f52d2f56d7 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5867,8 +5867,6 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, dev->gso_max_size = GSO_MAX_SIZE; - INIT_LIST_HEAD(&dev->ethtool_ntuple_list.list); - dev->ethtool_ntuple_list.count = 0; INIT_LIST_HEAD(&dev->napi_list); INIT_LIST_HEAD(&dev->unreg_list); INIT_LIST_HEAD(&dev->link_watch_list); @@ -5932,9 +5930,6 @@ void free_netdev(struct net_device *dev) /* Flush device addresses */ dev_addr_flush(dev); - /* Clear ethtool n-tuple list */ - ethtool_ntuple_flush(dev); - list_for_each_entry_safe(p, n, &dev->napi_list, dev_list) netif_napi_del(p); -- cgit v1.2.2 From 0b5c9db1b11d3175bb42b80663a9f072f801edf5 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Fri, 10 Jun 2011 06:56:58 +0000 Subject: vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check Testing of VLAN_FLAG_REORDER_HDR does not belong in vlan_untag but rather in vlan_do_receive. Otherwise the vlan header will not be properly put on the packet in the case of vlan header accelleration. As we remove the check from vlan_check_reorder_header rename it vlan_reorder_header to keep the naming clean. Fix up the skb->pkt_type early so we don't look at the packet after adding the vlan tag, which guarantees we don't goof and look at the wrong field. Use a simple if statement instead of a complicated switch statement to decided that we need to increment rx_stats for a multicast packet. Hopefully at somepoint we will just declare the case where VLAN_FLAG_REORDER_HDR is cleared as unsupported and remove the code. Until then this keeps it working correctly. Signed-off-by: Eric W. Biederman Signed-off-by: Jiri Pirko Acked-by: Changli Gao Signed-off-by: David S. Miller --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index a54c9f87ddbb..9c58c1ec41a9 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3114,7 +3114,7 @@ static int __netif_receive_skb(struct sk_buff *skb) skb_reset_network_header(skb); skb_reset_transport_header(skb); - skb->mac_len = skb->network_header - skb->mac_header; + skb_reset_mac_len(skb); pt_prev = NULL; -- cgit v1.2.2 From 56f8a75c17abb854b5907f4a815dc4c3f186ba11 Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Tue, 21 Jun 2011 20:33:34 -0700 Subject: ip: introduce ip_is_fragment helper inline function There are enough instances of this: iph->frag_off & htons(IP_MF | IP_OFFSET) that a helper function is probably warranted. Signed-off-by: Paul Gortmaker Signed-off-by: David S. Miller --- net/core/dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 8efe85070131..6b6ef14b42f2 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2532,7 +2532,7 @@ __u32 __skb_get_rxhash(struct sk_buff *skb) goto done; ip = (const struct iphdr *) (skb->data + nhoff); - if (ip->frag_off & htons(IP_MF | IP_OFFSET)) + if (ip_is_fragment(ip)) ip_proto = 0; else ip_proto = ip->protocol; -- cgit v1.2.2 From 4e985adaa504c1c1a05c8e013777ea0791a17b4d Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 21 Jun 2011 03:11:20 +0000 Subject: rtnl: provide link dump consistency info This patch adds a change sequence counter to each net namespace which is bumped whenever a netdevice is added or removed from the list. If such a change occurred while a link dump took place, the dump will have the NLM_F_DUMP_INTR flag set in the first message which has been interrupted and in all subsequent messages of the same dump. Note that links may still be modified or renamed while a dump is taking place but we can guarantee for userspace to receive a complete list of links and not miss any. Testing: I have added 500 VLAN netdevices to make sure the dump is split over multiple messages. Then while continuously dumping links in one process I also continuously deleted and re-added a dummy netdevice in another process. Multiple dumps per seconds have had the NLM_F_DUMP_INTR flag set. I guess we can wait for Johannes patch to hit net-next via the wireless tree. I just wanted to give this some testing right away. Signed-off-by: Thomas Graf Signed-off-by: David S. Miller --- net/core/dev.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 6b6ef14b42f2..4577e6711ec3 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -199,6 +199,11 @@ static struct list_head ptype_all __read_mostly; /* Taps */ DEFINE_RWLOCK(dev_base_lock); EXPORT_SYMBOL(dev_base_lock); +static inline void dev_base_seq_inc(struct net *net) +{ + while (++net->dev_base_seq == 0); +} + static inline struct hlist_head *dev_name_hash(struct net *net, const char *name) { unsigned hash = full_name_hash(name, strnlen(name, IFNAMSIZ)); @@ -237,6 +242,9 @@ static int list_netdevice(struct net_device *dev) hlist_add_head_rcu(&dev->index_hlist, dev_index_hash(net, dev->ifindex)); write_unlock_bh(&dev_base_lock); + + dev_base_seq_inc(net); + return 0; } @@ -253,6 +261,8 @@ static void unlist_netdevice(struct net_device *dev) hlist_del_rcu(&dev->name_hlist); hlist_del_rcu(&dev->index_hlist); write_unlock_bh(&dev_base_lock); + + dev_base_seq_inc(dev_net(dev)); } /* -- cgit v1.2.2 From f9d7a1187dfefc6b54b53e0ffff4d26c0eff2702 Mon Sep 17 00:00:00 2001 From: Shan Wei Date: Tue, 5 Jul 2011 20:44:17 -0700 Subject: net: Add GSO to vlan_features initialization Just add GSO to vlan_features initialization, and update comments. When we set offload features, vlan_dev_fix_features() will do more check. In vlan_dev_fix_features(), final features is decided by features of real device and vlan_features of real device. Signed-off-by: Shan Wei Signed-off-by: David S. Miller --- net/core/dev.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 4577e6711ec3..9ca15142d823 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5488,11 +5488,12 @@ int register_netdevice(struct net_device *dev) dev->features |= NETIF_F_NOCACHE_COPY; } - /* Enable GRO and NETIF_F_HIGHDMA for vlans by default, - * vlan_dev_init() will do the dev->features check, so these features - * are enabled only if supported by underlying device. + /* Enable GSO, GRO and NETIF_F_HIGHDMA for vlans by default, + * vlan_dev_fix_features() will do the features check, + * so NETIF_F_HIGHDMA feature is enabled only if supported + * by underlying device. */ - dev->vlan_features |= (NETIF_F_GRO | NETIF_F_HIGHDMA); + dev->vlan_features |= (NETIF_F_SOFT_FEATURES | NETIF_F_HIGHDMA); ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev); ret = notifier_to_errno(ret); -- cgit v1.2.2 From 1180e7d6599c1fb0c56a23a649a3eb37d877b9d0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Thu, 14 Jul 2011 14:41:11 -0700 Subject: net: cleanup vlan_features setting in register_netdev MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit vlan_features contains features inherited from underlying device. NETIF_SOFT_FEATURES are not inherited but belong to the vlan device itself (ensured in vlan_dev_fix_features()). Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- net/core/dev.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 9ca15142d823..e57be0262051 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5488,12 +5488,9 @@ int register_netdevice(struct net_device *dev) dev->features |= NETIF_F_NOCACHE_COPY; } - /* Enable GSO, GRO and NETIF_F_HIGHDMA for vlans by default, - * vlan_dev_fix_features() will do the features check, - * so NETIF_F_HIGHDMA feature is enabled only if supported - * by underlying device. + /* Make NETIF_F_HIGHDMA inheritable to VLAN devices. */ - dev->vlan_features |= (NETIF_F_SOFT_FEATURES | NETIF_F_HIGHDMA); + dev->vlan_features |= NETIF_F_HIGHDMA; ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev); ret = notifier_to_errno(ret); -- cgit v1.2.2 From fec30c33819b442fd618b10f405248ee7cbb51d8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Wed, 13 Jul 2011 14:10:30 +0000 Subject: net: unexport netdev_fix_features() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It is not used anywhere except net/core/dev.c now. Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- net/core/dev.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index e57be0262051..9444c5cb4137 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5209,7 +5209,7 @@ static void rollback_registered(struct net_device *dev) list_del(&single); } -u32 netdev_fix_features(struct net_device *dev, u32 features) +static u32 netdev_fix_features(struct net_device *dev, u32 features) { /* Fix illegal checksum combinations */ if ((features & NETIF_F_HW_CSUM) && @@ -5268,7 +5268,6 @@ u32 netdev_fix_features(struct net_device *dev, u32 features) return features; } -EXPORT_SYMBOL(netdev_fix_features); int __netdev_update_features(struct net_device *dev) { -- cgit v1.2.2 From 2d348d1f569f051d2609b04d27bb55cd25eda8fe Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 25 Jul 2011 16:17:35 -0700 Subject: net: Convert struct net_device uc_promisc to bool No need to use int, its uses are boolean. May save a few bytes one day. Signed-off-by: Joe Perches Signed-off-by: David S. Miller --- net/core/dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 9444c5cb4137..17d67b579beb 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4497,10 +4497,10 @@ void __dev_set_rx_mode(struct net_device *dev) */ if (!netdev_uc_empty(dev) && !dev->uc_promisc) { __dev_set_promiscuity(dev, 1); - dev->uc_promisc = 1; + dev->uc_promisc = true; } else if (netdev_uc_empty(dev) && dev->uc_promisc) { __dev_set_promiscuity(dev, -1); - dev->uc_promisc = 0; + dev->uc_promisc = false; } if (ops->ndo_set_multicast_list) -- cgit v1.2.2