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>
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@ -1215,6 +1215,9 @@ static noinline int btrfs_ioctl_ino_lookup(struct file *file,
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}
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inode = fdentry(file)->d_inode;
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if (args->treeid == 0)
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args->treeid = BTRFS_I(inode)->root->root_key.objectid;
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ret = btrfs_search_path_in_tree(BTRFS_I(inode)->root->fs_info,
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args->treeid, args->objectid,
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args->name);
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