diff options
Diffstat (limited to 'net/netlink/af_netlink.c')
| -rw-r--r-- | net/netlink/af_netlink.c | 57 |
1 files changed, 49 insertions, 8 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 246f29d365c0..596eaff66649 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -40,7 +40,7 @@ #include <linux/net.h> #include <linux/fs.h> #include <linux/slab.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/rtnetlink.h> @@ -96,6 +96,44 @@ EXPORT_SYMBOL_GPL(nl_table); static DECLARE_WAIT_QUEUE_HEAD(nl_table_wait); +static struct lock_class_key nlk_cb_mutex_keys[MAX_LINKS]; + +static const char *const nlk_cb_mutex_key_strings[MAX_LINKS + 1] = { + "nlk_cb_mutex-ROUTE", + "nlk_cb_mutex-1", + "nlk_cb_mutex-USERSOCK", + "nlk_cb_mutex-FIREWALL", + "nlk_cb_mutex-SOCK_DIAG", + "nlk_cb_mutex-NFLOG", + "nlk_cb_mutex-XFRM", + "nlk_cb_mutex-SELINUX", + "nlk_cb_mutex-ISCSI", + "nlk_cb_mutex-AUDIT", + "nlk_cb_mutex-FIB_LOOKUP", + "nlk_cb_mutex-CONNECTOR", + "nlk_cb_mutex-NETFILTER", + "nlk_cb_mutex-IP6_FW", + "nlk_cb_mutex-DNRTMSG", + "nlk_cb_mutex-KOBJECT_UEVENT", + "nlk_cb_mutex-GENERIC", + "nlk_cb_mutex-17", + "nlk_cb_mutex-SCSITRANSPORT", + "nlk_cb_mutex-ECRYPTFS", + "nlk_cb_mutex-RDMA", + "nlk_cb_mutex-CRYPTO", + "nlk_cb_mutex-SMC", + "nlk_cb_mutex-23", + "nlk_cb_mutex-24", + "nlk_cb_mutex-25", + "nlk_cb_mutex-26", + "nlk_cb_mutex-27", + "nlk_cb_mutex-28", + "nlk_cb_mutex-29", + "nlk_cb_mutex-30", + "nlk_cb_mutex-31", + "nlk_cb_mutex-MAX_LINKS" +}; + static int netlink_dump(struct sock *sk); static void netlink_skb_destructor(struct sk_buff *skb); @@ -113,7 +151,7 @@ static atomic_t nl_table_users = ATOMIC_INIT(0); #define nl_deref_protected(X) rcu_dereference_protected(X, lockdep_is_held(&nl_table_lock)); -static ATOMIC_NOTIFIER_HEAD(netlink_chain); +static BLOCKING_NOTIFIER_HEAD(netlink_chain); static DEFINE_SPINLOCK(netlink_tap_lock); static struct list_head netlink_tap_all __read_mostly; @@ -585,6 +623,9 @@ static int __netlink_create(struct net *net, struct socket *sock, } else { nlk->cb_mutex = &nlk->cb_def_mutex; mutex_init(nlk->cb_mutex); + lockdep_set_class_and_name(nlk->cb_mutex, + nlk_cb_mutex_keys + protocol, + nlk_cb_mutex_key_strings[protocol]); } init_waitqueue_head(&nlk->wait); @@ -711,7 +752,7 @@ static int netlink_release(struct socket *sock) .protocol = sk->sk_protocol, .portid = nlk->portid, }; - atomic_notifier_call_chain(&netlink_chain, + blocking_notifier_call_chain(&netlink_chain, NETLINK_URELEASE, &n); } @@ -1210,9 +1251,9 @@ static struct sk_buff *netlink_trim(struct sk_buff *skb, gfp_t allocation) skb = nskb; } - if (!pskb_expand_head(skb, 0, -delta, allocation)) - skb->truesize -= delta; - + pskb_expand_head(skb, 0, -delta, + (allocation & ~__GFP_DIRECT_RECLAIM) | + __GFP_NOWARN | __GFP_NORETRY); return skb; } @@ -2504,13 +2545,13 @@ static const struct file_operations netlink_seq_fops = { int netlink_register_notifier(struct notifier_block *nb) { - return atomic_notifier_chain_register(&netlink_chain, nb); + return blocking_notifier_chain_register(&netlink_chain, nb); } EXPORT_SYMBOL(netlink_register_notifier); int netlink_unregister_notifier(struct notifier_block *nb) { - return atomic_notifier_chain_unregister(&netlink_chain, nb); + return blocking_notifier_chain_unregister(&netlink_chain, nb); } EXPORT_SYMBOL(netlink_unregister_notifier); |