diff options
Diffstat (limited to 'fs/btrfs/zlib.c')
| -rw-r--r-- | fs/btrfs/zlib.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index c248f9286366..2b52950dc2c6 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -37,6 +37,7 @@ struct workspace { z_stream strm; char *buf; struct list_head list; + int level; }; static void zlib_free_workspace(struct list_head *ws) @@ -96,7 +97,7 @@ static int zlib_compress_pages(struct list_head *ws, *total_out = 0; *total_in = 0; - if (Z_OK != zlib_deflateInit(&workspace->strm, 3)) { + if (Z_OK != zlib_deflateInit(&workspace->strm, workspace->level)) { pr_warn("BTRFS: deflateInit failed\n"); ret = -EIO; goto out; @@ -402,10 +403,22 @@ next: return ret; } +static void zlib_set_level(struct list_head *ws, unsigned int type) +{ + struct workspace *workspace = list_entry(ws, struct workspace, list); + unsigned level = (type & 0xF0) >> 4; + + if (level > 9) + level = 9; + + workspace->level = level > 0 ? level : 3; +} + const struct btrfs_compress_op btrfs_zlib_compress = { .alloc_workspace = zlib_alloc_workspace, .free_workspace = zlib_free_workspace, .compress_pages = zlib_compress_pages, .decompress_bio = zlib_decompress_bio, .decompress = zlib_decompress, + .set_level = zlib_set_level, }; |