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.
Signed-off-by: Arnd Hannemann <arnd@xxxxxxxxxx>
---
fs/btrfs/super.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 8d5d380..f1fb6c0 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -394,15 +394,20 @@ 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);
} 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",
--
1.7.9.1
--
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