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authorLinus Torvalds <torvalds@linux-foundation.org>2011-06-16 10:21:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-06-16 10:21:59 -0700
commit8dac6bee32425dd5145b40fa2307648cb7fb4d4a (patch)
treeb7165517729b755686f336b3066ebc982c8793ea /net/core/net_namespace.c
parentf8f44f09eaa2bfb40651e7fc6054d65c8091499a (diff)
parentd6e43f751f252c68ca69fa6d18665d88d69ef8b7 (diff)
downloadlwn-8dac6bee32425dd5145b40fa2307648cb7fb4d4a.tar.gz
lwn-8dac6bee32425dd5145b40fa2307648cb7fb4d4a.zip
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: AFS: Use i_generation not i_version for the vnode uniquifier AFS: Set s_id in the superblock to the volume name vfs: Fix data corruption after failed write in __block_write_begin() afs: afs_fill_page reads too much, or wrong data VFS: Fix vfsmount overput on simultaneous automount fix wrong iput on d_inode introduced by e6bc45d65d Delay struct net freeing while there's a sysfs instance refering to it afs: fix sget() races, close leak on umount ubifs: fix sget races ubifs: split allocation of ubifs_info into a separate function fix leak in proc_set_super()
Diffstat (limited to 'net/core/net_namespace.c')
-rw-r--r--net/core/net_namespace.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index e41e5110c65c..ea489db1bc23 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -128,6 +128,7 @@ static __net_init int setup_net(struct net *net)
LIST_HEAD(net_exit_list);
atomic_set(&net->count, 1);
+ atomic_set(&net->passive, 1);
#ifdef NETNS_REFCNT_DEBUG
atomic_set(&net->use_count, 0);
@@ -210,6 +211,13 @@ static void net_free(struct net *net)
kmem_cache_free(net_cachep, net);
}
+void net_drop_ns(void *p)
+{
+ struct net *ns = p;
+ if (ns && atomic_dec_and_test(&ns->passive))
+ net_free(ns);
+}
+
struct net *copy_net_ns(unsigned long flags, struct net *old_net)
{
struct net *net;
@@ -230,7 +238,7 @@ struct net *copy_net_ns(unsigned long flags, struct net *old_net)
}
mutex_unlock(&net_mutex);
if (rv < 0) {
- net_free(net);
+ net_drop_ns(net);
return ERR_PTR(rv);
}
return net;
@@ -286,7 +294,7 @@ static void cleanup_net(struct work_struct *work)
/* Finally it is safe to free my network namespace structure */
list_for_each_entry_safe(net, tmp, &net_exit_list, exit_list) {
list_del_init(&net->exit_list);
- net_free(net);
+ net_drop_ns(net);
}
}
static DECLARE_WORK(net_cleanup_work, cleanup_net);