This simple patch makes "btrfs filesystem label" command actually work.
On tmp branch, commit d1dc6a9, "btrfs filesystem label" functionality was introduced. However the commit lacks one component that lets "btrfs" accept "filesystem label" command. Test case: #=================================================== # truncate -s 1G /tmp/dev.img # losetup -f /dev/loop0 # losetup /dev/loop0 /tmp/dev.img # mkfs.btrfs -L old /dev/loop0 WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using fs created label old on /dev/loop0 nodesize 4096 leafsize 4096 sectorsize 4096 size 1.00GB Btrfs Btrfs v0.19 # btrfs fi la /dev/loop0 old # btrfs fi la /dev/loop0 new # btrfs fi la /dev/loop0 new # mount /dev/disk/by-label/new /mnt/tmp # btrfs fi la /dev/loop0 FATAL: the filesystem has to be unmounted # umount /dev/loop0 # btrfs fi la /dev/loop0 new #=================================================== Not sure if you need if you need a signoff for something as trivial as this, but here it is just in case. Signed-off-by: Fajar A. Nugraha <l...@fajar.net> --- btrfs.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/btrfs.c b/btrfs.c index 4cd4210..84c2337 100644 --- a/btrfs.c +++ b/btrfs.c @@ -95,6 +95,12 @@ static struct Command commands[] = { "filesystem balance", "<path>\n" "Balance the chunks across the device." }, + { do_change_label, -1, + "filesystem label", "<device> [<newlabel>]\n" + "With one argument, get the label of filesystem on <device>.\n" + "If <newlabel> is passed, set the filesystem label to <newlabel>.\n" + "The filesystem must be unmounted.\n" + }, { do_scan, 999, "device scan", "[<device>...]\n" "Scan all device for or the passed device for a btrfs\n" --- -- Fajar -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
