diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-02-03 08:27:35 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-02-23 07:37:51 -0800 |
| commit | 16e63ecd5d683fe18d91fcd1e6a7f63468f7d805 (patch) | |
| tree | 85f0f3579204473780f95fe90e8ff4c8a225e45b /fs/nfs | |
| parent | 04673da74dbd331040fa439bd72963a35f1b67cf (diff) | |
NFS: Fix a umount race
commit 387c149b54b4321cbc790dadbd4f8eedb5a90468 upstream.
Ensure that we unregister the bdi before kill_anon_super() calls
ida_remove() on our device name.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/super.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index e71f0fdff1d..4bf23f6f93c 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -241,6 +241,7 @@ static int nfs_show_stats(struct seq_file *, struct vfsmount *); static int nfs_get_sb(struct file_system_type *, int, const char *, void *, struct vfsmount *); static int nfs_xdev_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt); +static void nfs_put_super(struct super_block *); static void nfs_kill_super(struct super_block *); static int nfs_remount(struct super_block *sb, int *flags, char *raw_data); @@ -264,6 +265,7 @@ static const struct super_operations nfs_sops = { .alloc_inode = nfs_alloc_inode, .destroy_inode = nfs_destroy_inode, .write_inode = nfs_write_inode, + .put_super = nfs_put_super, .statfs = nfs_statfs, .clear_inode = nfs_clear_inode, .umount_begin = nfs_umount_begin, @@ -333,6 +335,7 @@ static const struct super_operations nfs4_sops = { .alloc_inode = nfs_alloc_inode, .destroy_inode = nfs_destroy_inode, .write_inode = nfs_write_inode, + .put_super = nfs_put_super, .statfs = nfs_statfs, .clear_inode = nfs4_clear_inode, .umount_begin = nfs_umount_begin, @@ -2196,6 +2199,17 @@ error_splat_super: } /* + * Ensure that we unregister the bdi before kill_anon_super + * releases the device name + */ +static void nfs_put_super(struct super_block *s) +{ + struct nfs_server *server = NFS_SB(s); + + bdi_unregister(&server->backing_dev_info); +} + +/* * Destroy an NFS2/3 superblock */ static void nfs_kill_super(struct super_block *s) @@ -2203,7 +2217,6 @@ static void nfs_kill_super(struct super_block *s) struct nfs_server *server = NFS_SB(s); kill_anon_super(s); - bdi_unregister(&server->backing_dev_info); nfs_fscache_release_super_cookie(s); nfs_free_server(server); } |