aboutsummaryrefslogtreecommitdiff
path: root/fs/nfs/super.c
diff options
context:
space:
mode:
authorTrond Myklebust <trond.myklebust@primarydata.com>2015-02-05 15:13:24 -0500
committerTrond Myklebust <trond.myklebust@primarydata.com>2015-02-05 21:31:06 -0500
commitea7c38fef0b774a5dc16fb0ca5935f0ae8568176 (patch)
treebeab8b32b90a57d54293eb83bd8d5f3f75c3be2c /fs/nfs/super.c
parent6ae373394c4257bad562817aa60464ff7fe8f9c4 (diff)
downloadleg-kernel-ea7c38fef0b774a5dc16fb0ca5935f0ae8568176.tar.gz
NFSv4: Ensure we reference the inode for return-on-close in delegreturn
If we have to do a return-on-close in the delegreturn code, then we must ensure that the inode and super block remain referenced. Cc: Peng Tao <tao.peng@primarydata.com> Cc: stable@vger.kernel.org # 3.17.x Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Reviewed-by: Peng Tao <tao.peng@primarydata.com>
Diffstat (limited to 'fs/nfs/super.c')
-rw-r--r--fs/nfs/super.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 31a11b0e885d..368d9395d2e7 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -405,12 +405,15 @@ void __exit unregister_nfs_fs(void)
unregister_filesystem(&nfs_fs_type);
}
-void nfs_sb_active(struct super_block *sb)
+bool nfs_sb_active(struct super_block *sb)
{
struct nfs_server *server = NFS_SB(sb);
- if (atomic_inc_return(&server->active) == 1)
- atomic_inc(&sb->s_active);
+ if (!atomic_inc_not_zero(&sb->s_active))
+ return false;
+ if (atomic_inc_return(&server->active) != 1)
+ atomic_dec(&sb->s_active);
+ return true;
}
EXPORT_SYMBOL_GPL(nfs_sb_active);