lkml.org 
[lkml]   [2019]   [Sep]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.14 14/45] btrfs: compression: add helper for type to string conversion
Date
From: David Sterba <dsterba@suse.com>

commit e128f9c3f7242318e1c76d204c7ae32bc878b8c7 upstream.

There are several places opencoding this conversion, add a helper now
that we have 3 compression algorithms.

Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/btrfs/compression.c | 15 +++++++++++++++
fs/btrfs/compression.h | 2 ++
2 files changed, 17 insertions(+)

--- 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,
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -130,6 +130,8 @@ extern const struct btrfs_compress_op bt
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

\
 
 \ /
  Last update: 2019-09-18 08:21    [W:0.143 / U:0.732 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site