btrfs: compression: add helper for type to string conversion
There are several places opencoding this conversion, add a helper now
that we have 3 compression algorithms.
Signed-off-by: David Sterba <[email protected]>
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 8cd48d7..28c3940 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -44,6 +44,21 @@
#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,
