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Btrfs: allow treeid==0 in the inode lookup ioctl

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When a root id of 0 is sent to the inode lookup ioctl, it will
use the root of the file we're ioctling and pass the root id
back to userland along with the results.

This allows userland to do searches based on that root later on.


Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2010-03-18 12:17:05 -04:00
parent 90fdde147f
commit 1b53ac4d1b
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/ioctl.c
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@ -1215,6 +1215,9 @@ static noinline int btrfs_ioctl_ino_lookup(struct file *file,
}
inode = fdentry(file)->d_inode;
if (args->treeid == 0)
args->treeid = BTRFS_I(inode)->root->root_key.objectid;
ret = btrfs_search_path_in_tree(BTRFS_I(inode)->root->fs_info,
args->treeid, args->objectid,
args->name);