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Btrfs: fix output of compression message in btrfs_parse_options() 

The compression message might not be correctly output.
Fix it.

[[before fix]]

# mount -o compress /dev/sdb3 /test3
[  996.874264] BTRFS info (device sdb3): disk space caching is enabled
[  996.874268] BTRFS: has skinny extents
# mount | grep /test3
/dev/sdb3 on /test3 type btrfs (rw,relatime,compress=zlib,space_cache,subvolid=5,subvol=/)

# mount -o remount,compress-force /dev/sdb3 /test3
[ 1035.075017] BTRFS info (device sdb3): force zlib compression
[ 1035.075021] BTRFS info (device sdb3): disk space caching is enabled
# mount | grep /test3
/dev/sdb3 on /test3 type btrfs (rw,relatime,compress-force=zlib,space_cache,subvolid=5,subvol=/)

# mount -o remount,compress /dev/sdb3 /test3
[ 1053.679092] BTRFS info (device sdb3): disk space caching is enabled
# mount | grep /test3
/dev/sdb3 on /test3 type btrfs (rw,relatime,compress=zlib,space_cache,subvolid=5,subvol=/)

[[after fix]]

# mount -o compress /dev/sdb3 /test3
[  401.021753] BTRFS info (device sdb3): use zlib compression
[  401.021758] BTRFS info (device sdb3): disk space caching is enabled
[  401.021760] BTRFS: has skinny extents
# mount | grep /test3
/dev/sdb3 on /test3 type btrfs (rw,relatime,compress=zlib,space_cache,subvolid=5,subvol=/)

# mount -o remount,compress-force /dev/sdb3 /test3
[  439.824624] BTRFS info (device sdb3): force zlib compression
[  439.824629] BTRFS info (device sdb3): disk space caching is enabled
# mount | grep /test3
/dev/sdb3 on /test3 type btrfs (rw,relatime,compress-force=zlib,space_cache,subvolid=5,subvol=/)

# mount -o remount,compress /dev/sdb3 /test3
[  459.918430] BTRFS info (device sdb3): use zlib compression
[  459.918434] BTRFS info (device sdb3): disk space caching is enabled
# mount | grep /test3
/dev/sdb3 on /test3 type btrfs (rw,relatime,compress=zlib,space_cache,subvolid=5,subvol=/)

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Tsutomu Itoh 2016-01-06 17:03:40 +09:00 committed by David Sterba
parent f32e48e925
commit b7c47bbb2d
1 changed files with 22 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
fs/btrfs/super.c
View File

@ -381,6 +381,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
int ret = 0; int ret = 0;
char *compress_type; char *compress_type;
bool compress_force = false; bool compress_force = false;
enum btrfs_compression_type saved_compress_type;
bool saved_compress_force;
int no_compress = 0;
cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy); cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy);
if (cache_gen) if (cache_gen)
@ -458,6 +461,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
/* Fallthrough */ /* Fallthrough */
case Opt_compress: case Opt_compress:
case Opt_compress_type: case Opt_compress_type:
saved_compress_type = btrfs_test_opt(root, COMPRESS) ?
info->compress_type : BTRFS_COMPRESS_NONE;
saved_compress_force =
btrfs_test_opt(root, FORCE_COMPRESS);
if (token == Opt_compress || if (token == Opt_compress ||
token == Opt_compress_force || token == Opt_compress_force ||
strcmp(args[0].from, "zlib") == 0) { strcmp(args[0].from, "zlib") == 0) {
@ -466,6 +473,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_set_opt(info->mount_opt, COMPRESS); btrfs_set_opt(info->mount_opt, COMPRESS);
btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM); btrfs_clear_opt(info->mount_opt, NODATASUM);
no_compress = 0;
} else if (strcmp(args[0].from, "lzo") == 0) { } else if (strcmp(args[0].from, "lzo") == 0) {
compress_type = "lzo"; compress_type = "lzo";
info->compress_type = BTRFS_COMPRESS_LZO; info->compress_type = BTRFS_COMPRESS_LZO;
@ -473,25 +481,21 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM); btrfs_clear_opt(info->mount_opt, NODATASUM);
btrfs_set_fs_incompat(info, COMPRESS_LZO); btrfs_set_fs_incompat(info, COMPRESS_LZO);
no_compress = 0;
} else if (strncmp(args[0].from, "no", 2) == 0) { } else if (strncmp(args[0].from, "no", 2) == 0) {
compress_type = "no"; compress_type = "no";
btrfs_clear_opt(info->mount_opt, COMPRESS); btrfs_clear_opt(info->mount_opt, COMPRESS);
btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
compress_force = false; compress_force = false;
no_compress++;
} else { } else {
ret = -EINVAL; ret = -EINVAL;
goto out; goto out;
} }
if (compress_force) { if (compress_force) {
btrfs_set_and_info(root, FORCE_COMPRESS, btrfs_set_opt(info->mount_opt, FORCE_COMPRESS);
"force %s compression",
compress_type);
} else { } else {
if (!btrfs_test_opt(root, COMPRESS))
btrfs_info(root->fs_info,
"btrfs: use %s compression",
compress_type);
/* /*
* If we remount from compress-force=xxx to * If we remount from compress-force=xxx to
* compress=xxx, we need clear FORCE_COMPRESS * compress=xxx, we need clear FORCE_COMPRESS
@ -500,6 +504,17 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
*/ */
btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS);
} }
if ((btrfs_test_opt(root, COMPRESS) &&
(info->compress_type != saved_compress_type ||
compress_force != saved_compress_force)) ||
(!btrfs_test_opt(root, COMPRESS) &&
no_compress == 1)) {
btrfs_info(root->fs_info,
"%s %s compression",
(compress_force) ? "force" : "use",
compress_type);
}
compress_force = false;
break; break;
case Opt_ssd: case Opt_ssd:
btrfs_set_and_info(root, SSD, btrfs_set_and_info(root, SSD,