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

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>
Chris Mason 15 ani în urmă
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1b53ac4d1b
1 a modificat fișierele cu 3 adăugiri și 0 ștergeri
  1. 3 0
      fs/btrfs/ioctl.c

+ 3 - 0
fs/btrfs/ioctl.c

@@ -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);