From: David Sterba <dsterba@xxxxxxxx>
[ Upstream commit e128f9c3f7242318e1c76d204c7ae32bc878b8c7 ]
There are several places opencoding this conversion, add a helper now
that we have 3 compression algorithms.
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
---
fs/btrfs/compression.c | 15 +++++++++++++++
fs/btrfs/compression.h | 2 ++
2 files changed, 17 insertions(+)
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 280384bf34f1..d7aa96e1fc36 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -43,6 +43,21 @@
#include "extent_io.h"
#include "extent_map.h"
+static const char* const btrfs_compress_types[] = { "", "zlib", "lzo", "zstd" };
+
+const char* btrfs_compress_type2str(enum btrfs_compression_type type)
+{
+ switch (type) {
+ case BTRFS_COMPRESS_ZLIB:
+ case BTRFS_COMPRESS_LZO:
+ case BTRFS_COMPRESS_ZSTD:
+ case BTRFS_COMPRESS_NONE:
+ return btrfs_compress_types[type];
+ }
+
+ return NULL;
+}
+
static int btrfs_decompress_bio(struct compressed_bio *cb);
static inline int compressed_bio_size(struct btrfs_fs_info *fs_info,
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index d2781ff8f994..adb704757955 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -130,6 +130,8 @@ extern const struct btrfs_compress_op btrfs_zlib_compress;
extern const struct btrfs_compress_op btrfs_lzo_compress;
extern const struct btrfs_compress_op btrfs_zstd_compress;
+const char* btrfs_compress_type2str(enum btrfs_compression_type type);
+
int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end);
#endif
--
2.16.4
