Check whether the user has set compress=lz4 in the mount options
and if so set the compress method to lz4.
Signed-off-by: Philip Worrall <philip.worrall@xxxxxxxxxxxxxx>
---
fs/btrfs/super.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d4878dd..a348734 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -506,6 +506,14 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM);
btrfs_set_fs_incompat(info, COMPRESS_LZO);
+ } else if (strcmp(args[0].from, "lz4") == 0) {
+ printk(KERN_WARNING "BTRFS: Using LZ4 compression\n");
+ compress_type = "lz4";
+ info->compress_type = BTRFS_COMPRESS_LZ4;
+ btrfs_set_opt(info->mount_opt, COMPRESS);
+ btrfs_clear_opt(info->mount_opt, NODATACOW);
+ btrfs_clear_opt(info->mount_opt, NODATASUM);
+ btrfs_set_fs_incompat(info, COMPRESS_LZ4);
} else if (strncmp(args[0].from, "no", 2) == 0) {
compress_type = "no";
btrfs_clear_opt(info->mount_opt, COMPRESS);
@@ -1035,8 +1043,10 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
if (btrfs_test_opt(root, COMPRESS)) {
if (info->compress_type == BTRFS_COMPRESS_ZLIB)
compress_type = "zlib";
- else
+ else if (info->compress_type == BTRFS_COMPRESS_LZO)
compress_type = "lzo";
+ else
+ compress_type = "lz4";
if (btrfs_test_opt(root, FORCE_COMPRESS))
seq_printf(seq, ",compress-force=%s", compress_type);
else
--
1.9.1
--
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