[PATCH] btrfs: property: Set incompat flag of lzo/zstd compression

[Misono Tomohiro]

Incompat flag of lzo/zstd compression should be set at:
 1. mount time (-o compress/compress-force)
 2. when defrag is done
 3. when property is set

Currently 3. is missing and this commit adds this.

Signed-off-by: Tomohiro Misono <misono.tomoh...@jp.fujitsu.com>
---
 fs/btrfs/props.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c
index 53a8c95828e3..dc6140013ae8 100644
--- a/fs/btrfs/props.c
+++ b/fs/btrfs/props.c
@@ -380,6 +380,7 @@ static int prop_compression_apply(struct inode *inode,
                                  const char *value,
                                  size_t len)
 {
+       struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
        int type;
 
        if (len == 0) {
@@ -390,14 +391,17 @@ static int prop_compression_apply(struct inode *inode,
                return 0;
        }
 
-       if (!strncmp("lzo", value, 3))
+       if (!strncmp("lzo", value, 3)) {
                type = BTRFS_COMPRESS_LZO;
-       else if (!strncmp("zlib", value, 4))
+               btrfs_set_fs_incompat(fs_info, COMPRESS_LZO);
+       } else if (!strncmp("zlib", value, 4)) {
                type = BTRFS_COMPRESS_ZLIB;
-       else if (!strncmp("zstd", value, len))
+       } else if (!strncmp("zstd", value, len)) {
                type = BTRFS_COMPRESS_ZSTD;
-       else
+               btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD);
+       } else {
                return -EINVAL;
+       }
 
        BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS;
        BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS;
-- 
2.14.3


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