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| author |   Chris Mason <chris.mason@oracle.com> | 2008-11-17 21:14:24 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-11-17 21:14:24 -0500 |
| commit | ea9e8b11bd1252dcbc23afefcf1a52ec6aa3c113 (patch) | |
| tree | 3573c8d79e1936e8c921a3be77abda35124e0d78 /fs/btrfs/disk-io.c | |
| parent | Btrfs: Add backrefs and forward refs for subvols and snapshots (diff) | |
| download | linux-dev-ea9e8b11bd1252dcbc23afefcf1a52ec6aa3c113.tar.xz linux-dev-ea9e8b11bd1252dcbc23afefcf1a52ec6aa3c113.zip | |
Btrfs: prevent loops in the directory tree when creating snapshots
For a directory tree:
/mnt/subvolA/subvolB
btrfsctl -s /mnt/subvolA/subvolB /mnt
Will create a directory loop with subvolA under subvolB. This
commit uses the forward refs for each subvol and snapshot to error out
before creating the loop.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8d7866b733d6..e18250a6fd2d 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1129,7 +1129,7 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, kfree(root); return ERR_PTR(ret); } - +#if 0 ret = btrfs_sysfs_add_root(root); if (ret) { free_extent_buffer(root->node); @@ -1137,6 +1137,7 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, kfree(root); return ERR_PTR(ret); } +#endif root->in_sysfs = 1; return root; } @@ -1963,8 +1964,10 @@ int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) down_write(&root->anon_super.s_umount); kill_anon_super(&root->anon_super); } +#if 0 if (root->in_sysfs) btrfs_sysfs_del_root(root); +#endif if (root->node) free_extent_buffer(root->node); if (root->commit_root) |