diff options
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/dev.c | 34 | ||||
| -rw-r--r-- | net/core/dev_ioctl.c | 19 | ||||
| -rw-r--r-- | net/core/ethtool.c | 6 | ||||
| -rw-r--r-- | net/core/skbuff.c | 20 | ||||
| -rw-r--r-- | net/core/sock.c | 17 |
5 files changed, 55 insertions, 41 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index fc1e289397f..faebb398fb4 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -792,6 +792,40 @@ struct net_device *dev_get_by_index(struct net *net, int ifindex) EXPORT_SYMBOL(dev_get_by_index); /** + * netdev_get_name - get a netdevice name, knowing its ifindex. + * @net: network namespace + * @name: a pointer to the buffer where the name will be stored. + * @ifindex: the ifindex of the interface to get the name from. + * + * The use of raw_seqcount_begin() and cond_resched() before + * retrying is required as we want to give the writers a chance + * to complete when CONFIG_PREEMPT is not set. + */ +int netdev_get_name(struct net *net, char *name, int ifindex) +{ + struct net_device *dev; + unsigned int seq; + +retry: + seq = raw_seqcount_begin(&devnet_rename_seq); + rcu_read_lock(); + dev = dev_get_by_index_rcu(net, ifindex); + if (!dev) { + rcu_read_unlock(); + return -ENODEV; + } + + strcpy(name, dev->name); + rcu_read_unlock(); + if (read_seqcount_retry(&devnet_rename_seq, seq)) { + cond_resched(); + goto retry; + } + + return 0; +} + +/** * dev_getbyhwaddr_rcu - find a device by its hardware address * @net: the applicable net namespace * @type: media type of device diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index 6cc0481faad..5b7d0e1d066 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -19,9 +19,8 @@ static int dev_ifname(struct net *net, struct ifreq __user *arg) { - struct net_device *dev; struct ifreq ifr; - unsigned seq; + int error; /* * Fetch the caller's info block. @@ -30,19 +29,9 @@ static int dev_ifname(struct net *net, struct ifreq __user *arg) if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) return -EFAULT; -retry: - seq = read_seqcount_begin(&devnet_rename_seq); - rcu_read_lock(); - dev = dev_get_by_index_rcu(net, ifr.ifr_ifindex); - if (!dev) { - rcu_read_unlock(); - return -ENODEV; - } - - strcpy(ifr.ifr_name, dev->name); - rcu_read_unlock(); - if (read_seqcount_retry(&devnet_rename_seq, seq)) - goto retry; + error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex); + if (error) + return error; if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) return -EFAULT; diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 22efdaa76eb..ce91766eeca 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -60,10 +60,10 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6", [NETIF_F_HIGHDMA_BIT] = "highdma", [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist", - [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-ctag-hw-insert", + [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert", - [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-ctag-hw-parse", - [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-ctag-filter", + [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse", + [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter", [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert", [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse", [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter", diff --git a/net/core/skbuff.c b/net/core/skbuff.c index cfd777bd6bd..1c1738cc453 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -483,15 +483,8 @@ EXPORT_SYMBOL(skb_add_rx_frag); static void skb_drop_list(struct sk_buff **listp) { - struct sk_buff *list = *listp; - + kfree_skb_list(*listp); *listp = NULL; - - do { - struct sk_buff *this = list; - list = list->next; - kfree_skb(this); - } while (list); } static inline void skb_drop_fraglist(struct sk_buff *skb) @@ -651,6 +644,17 @@ void kfree_skb(struct sk_buff *skb) } EXPORT_SYMBOL(kfree_skb); +void kfree_skb_list(struct sk_buff *segs) +{ + while (segs) { + struct sk_buff *next = segs->next; + + kfree_skb(segs); + segs = next; + } +} +EXPORT_SYMBOL(kfree_skb_list); + /** * skb_tx_error - report an sk_buff xmit error * @skb: buffer that triggered an error diff --git a/net/core/sock.c b/net/core/sock.c index 88868a9d21d..d6d024cfaaa 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -571,9 +571,7 @@ static int sock_getbindtodevice(struct sock *sk, char __user *optval, int ret = -ENOPROTOOPT; #ifdef CONFIG_NETDEVICES struct net *net = sock_net(sk); - struct net_device *dev; char devname[IFNAMSIZ]; - unsigned seq; if (sk->sk_bound_dev_if == 0) { len = 0; @@ -584,20 +582,9 @@ static int sock_getbindtodevice(struct sock *sk, char __user *optval, if (len < IFNAMSIZ) goto out; -retry: - seq = read_seqcount_begin(&devnet_rename_seq); - rcu_read_lock(); - dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); - ret = -ENODEV; - if (!dev) { - rcu_read_unlock(); + ret = netdev_get_name(net, devname, sk->sk_bound_dev_if); + if (ret) goto out; - } - - strcpy(devname, dev->name); - rcu_read_unlock(); - if (read_seqcount_retry(&devnet_rename_seq, seq)) - goto retry; len = strlen(devname) + 1; |