On 07/31/2012 08:53 AM, Alexander Karbstein wrote:
> The command btrfs subvolume set-default 0 /path/to/fs changed the
> default subvolume to whatever subvolume was currently mounted on
> /path/to/fs. This patch changes this behaviour to set the default
> subvolume to BTRFS_FS_TREE_OBJECTID in case the user asks for
> subvolid=0
>
> Signed-off-by: Alexander Karbstein <alexander.karbstein@xxxxxxxxx>
> ---
> btrfs_cmds.c | 5 +++++
> 1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/btrfs_cmds.c b/btrfs_cmds.c
> index f2b6355..699d9b0 100644
> --- a/btrfs_cmds.c
> +++ b/btrfs_cmds.c
> @@ -964,6 +964,11 @@ int do_set_default_subvol(int nargs, char **argv)
> fprintf(stderr, "ERROR: invalid tree id (%s)\n",subvolid);
> return 30;
> }
> +
> + /* Using the original root fs tree */
> + if (objectid == 0ULL) {
> + objectid = BTRFS_FS_TREE_OBJECTID;
> + }
> ret = ioctl(fd, BTRFS_IOC_DEFAULT_SUBVOL, &objectid);
> e = errno;
> close(fd);
Seems that you're using an old btrfs-prog source code, now the file is cmds-subvolume.c
And also checkpatch.pl complains about style errors while checking this.
thanks,
liubo
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