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Commit e128f9c3 authored by David Sterba's avatar David Sterba
Browse files

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: default avatarDavid Sterba <dsterba@suse.com>
parent bf8d32b9

fs/btrfs/compression.c

+15 −0
Original line number Diff line number Diff line
@@ -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,

fs/btrfs/compression.h

+2 −0
Original line number Diff line number Diff line
@@ -137,6 +137,8 @@ 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