diff options
| author | Arnd Hannemann <arnd@arndnet.de> | 2012-04-16 15:27:51 +0200 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2012-07-23 15:41:38 -0400 |
| commit | 063849eafda03edf6872a3728b4a98dcc86290c7 (patch) | |
| tree | 0582bdbb8271a39e32117c43a8bda6ee0b01df93 | |
| parent | c5c3c5f31e6af2d12b154251a7f23b7f4add6b1d (diff) | |
| download | linux-063849eafda03edf6872a3728b4a98dcc86290c7.tar.bz2 | |
Btrfs: allow mount -o remount,compress=no
Btrfs allows to turn on compression on a mounted and used filesystem
by issuing mount -o remount,compress=lzo.
This patch allows to turn compression off again
while the filesystem is mounted. As suggested by David Sterba
if the compress-force option was set, it is implicitly cleared
if compression is turned off.
Tested-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
| -rw-r--r-- | fs/btrfs/super.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index ddc2efdda1ab..88a2d2bb2d75 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -396,15 +396,22 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) strcmp(args[0].from, "zlib") == 0) { compress_type = "zlib"; info->compress_type = BTRFS_COMPRESS_ZLIB; + btrfs_set_opt(info->mount_opt, COMPRESS); } else if (strcmp(args[0].from, "lzo") == 0) { compress_type = "lzo"; info->compress_type = BTRFS_COMPRESS_LZO; + btrfs_set_opt(info->mount_opt, COMPRESS); + } else if (strncmp(args[0].from, "no", 2) == 0) { + compress_type = "no"; + info->compress_type = BTRFS_COMPRESS_NONE; + btrfs_clear_opt(info->mount_opt, COMPRESS); + btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); + compress_force = false; } else { ret = -EINVAL; goto out; } - btrfs_set_opt(info->mount_opt, COMPRESS); if (compress_force) { btrfs_set_opt(info->mount_opt, FORCE_COMPRESS); pr_info("btrfs: force %s compression\n", |