From f51d2b59120ff364a5e612a594ed358767e1cd09 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Fri, 15 Sep 2017 17:36:57 +0200 Subject: 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 --- fs/btrfs/lzo.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/btrfs/lzo.c') diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c index d433e75d489a..6c7f18cd3b61 100644 --- a/fs/btrfs/lzo.c +++ b/fs/btrfs/lzo.c @@ -430,10 +430,15 @@ out: return ret; } +static void lzo_set_level(struct list_head *ws, unsigned int type) +{ +} + const struct btrfs_compress_op btrfs_lzo_compress = { .alloc_workspace = lzo_alloc_workspace, .free_workspace = lzo_free_workspace, .compress_pages = lzo_compress_pages, .decompress_bio = lzo_decompress_bio, .decompress = lzo_decompress, + .set_level = lzo_set_level, }; -- cgit