Re: [PATCH] Btrfs-progs: Enabled setting root subvolume with subvolid=0
From: Liu Bo <hidden>
Date: 2012-07-31 01:27:13
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
quoted hunk ↗ jump to hunk
Signed-off-by: Alexander Karbstein <redacted> --- 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