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| author |   David Sterba <dsterba@suse.com> | 2017-09-15 17:36:57 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-11-01 20:45:29 +0100 |
| commit | f51d2b59120ff364a5e612a594ed358767e1cd09 (patch) | |
| tree | 349ed68bde053fc040138f4255aca2dab83b0bba /fs/btrfs/super.c | |
| parent | btrfs: Replace opencoded sizes with their symbolic constants (diff) | |
| download | linux-dev-f51d2b59120ff364a5e612a594ed358767e1cd09.tar.xz linux-dev-f51d2b59120ff364a5e612a594ed358767e1cd09.zip | |
btrfs: allow to set compression level for zlib
Preliminary support for setting compression level for zlib, the
following works:
$ mount -o compess=zlib # default
$ mount -o compess=zlib0 # same
$ mount -o compess=zlib9 # level 9, slower sync, less data
$ mount -o compess=zlib1 # level 1, faster sync, more data
$ mount -o remount,compress=zlib3 # level set by remount
The compress-force works the same as compress'. The level is visible in
the same format in /proc/mounts. Level set via file property does not
work yet.
Required patch: "btrfs: prepare for extensions in compression options"
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/super.c')
| -rw-r--r-- | fs/btrfs/super.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 4fb7eefb80ae..57f3f9600e18 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -508,6 +508,8 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, strncmp(args[0].from, "zlib", 4) == 0) { compress_type = "zlib"; info->compress_type = BTRFS_COMPRESS_ZLIB; + info->compress_level = + btrfs_compress_str2level(args[0].from); btrfs_set_opt(info->mount_opt, COMPRESS); btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATASUM); @@ -555,9 +557,9 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, compress_force != saved_compress_force)) || (!btrfs_test_opt(info, COMPRESS) && no_compress == 1)) { - btrfs_info(info, "%s %s compression", + btrfs_info(info, "%s %s compression, level %d", (compress_force) ? "force" : "use", - compress_type); + compress_type, info->compress_level); } compress_force = false; break; @@ -1258,6 +1260,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_printf(seq, ",compress-force=%s", compress_type); else seq_printf(seq, ",compress=%s", compress_type); + if (info->compress_level) + seq_printf(seq, "%d", info->compress_level); } if (btrfs_test_opt(info, NOSSD)) seq_puts(seq, ",nossd"); |