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authorDavid Woodhouse <David.Woodhouse@intel.com>2008-08-19 16:49:35 +0100
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:06 -0400
commit76fcef19c40328499a2f6d59d76b72fd03d2cc82 (patch)
tree1e9394a1cb42ae021f4eedac7954d69b23b062f4
parent87acb4ef9b2991e1c453b78d71bce2ef994ef1ff (diff)
Btrfs: Reinstate '-osubvol=.' option to mount entire tree
Date: Tue, 19 Aug 2008 16:49:35 +0100 This disappeared when I removed the special case for '.' in btrfs_lookup() Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/super.c34
1 files changed, 19 insertions, 15 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 55f4d00fda3..f7b3eac7ac6 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -451,21 +451,25 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
s->s_flags |= MS_ACTIVE;
}
- mutex_lock(&s->s_root->d_inode->i_mutex);
- root = lookup_one_len(subvol_name, s->s_root, strlen(subvol_name));
- mutex_unlock(&s->s_root->d_inode->i_mutex);
- if (IS_ERR(root)) {
- up_write(&s->s_umount);
- deactivate_super(s);
- error = PTR_ERR(root);
- goto error;
- }
- if (!root->d_inode) {
- dput(root);
- up_write(&s->s_umount);
- deactivate_super(s);
- error = -ENXIO;
- goto error;
+ if (!strcmp(subvol_name, "."))
+ root = dget(s->s_root);
+ else {
+ mutex_lock(&s->s_root->d_inode->i_mutex);
+ root = lookup_one_len(subvol_name, s->s_root, strlen(subvol_name));
+ mutex_unlock(&s->s_root->d_inode->i_mutex);
+ if (IS_ERR(root)) {
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ error = PTR_ERR(root);
+ goto error;
+ }
+ if (!root->d_inode) {
+ dput(root);
+ up_write(&s->s_umount);
+ deactivate_super(s);
+ error = -ENXIO;
+ goto error;
+ }
}
mnt->mnt_sb = s;