btrfs: export compression and decompression callbacks
Export compress_pages, decompress_bio and decompress callbacks for all
compression algos. The indirect calls will be replaced by a switch.
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 93deaf0..8611a8b 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -29,6 +29,30 @@
#include "extent_io.h"
#include "extent_map.h"
+int zlib_compress_pages(struct list_head *ws, struct address_space *mapping,
+ u64 start, struct page **pages, unsigned long *out_pages,
+ unsigned long *total_in, unsigned long *total_out);
+int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
+int zlib_decompress(struct list_head *ws, unsigned char *data_in,
+ struct page *dest_page, unsigned long start_byte, size_t srclen,
+ size_t destlen);
+
+int lzo_compress_pages(struct list_head *ws, struct address_space *mapping,
+ u64 start, struct page **pages, unsigned long *out_pages,
+ unsigned long *total_in, unsigned long *total_out);
+int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
+int lzo_decompress(struct list_head *ws, unsigned char *data_in,
+ struct page *dest_page, unsigned long start_byte, size_t srclen,
+ size_t destlen);
+
+int zstd_compress_pages(struct list_head *ws, struct address_space *mapping,
+ u64 start, struct page **pages, unsigned long *out_pages,
+ unsigned long *total_in, unsigned long *total_out);
+int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb);
+int zstd_decompress(struct list_head *ws, unsigned char *data_in,
+ struct page *dest_page, unsigned long start_byte, size_t srclen,
+ size_t destlen);
+
static const char* const btrfs_compress_types[] = { "", "zlib", "lzo", "zstd" };
const char* btrfs_compress_type2str(enum btrfs_compression_type type)
diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index acad417..04a6815 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -131,13 +131,9 @@ static inline size_t read_compress_length(const char *buf)
return le32_to_cpu(dlen);
}
-static int lzo_compress_pages(struct list_head *ws,
- struct address_space *mapping,
- u64 start,
- struct page **pages,
- unsigned long *out_pages,
- unsigned long *total_in,
- unsigned long *total_out)
+int lzo_compress_pages(struct list_head *ws, struct address_space *mapping,
+ u64 start, struct page **pages, unsigned long *out_pages,
+ unsigned long *total_in, unsigned long *total_out)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
int ret = 0;
@@ -303,7 +299,7 @@ static int lzo_compress_pages(struct list_head *ws,
return ret;
}
-static int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
+int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
int ret = 0, ret2;
@@ -444,10 +440,9 @@ static int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
return ret;
}
-static int lzo_decompress(struct list_head *ws, unsigned char *data_in,
- struct page *dest_page,
- unsigned long start_byte,
- size_t srclen, size_t destlen)
+int lzo_decompress(struct list_head *ws, unsigned char *data_in,
+ struct page *dest_page, unsigned long start_byte, size_t srclen,
+ size_t destlen)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
size_t in_len;
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index df1aace..4091f94 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -88,13 +88,9 @@ static struct list_head *zlib_alloc_workspace(unsigned int level)
return ERR_PTR(-ENOMEM);
}
-static int zlib_compress_pages(struct list_head *ws,
- struct address_space *mapping,
- u64 start,
- struct page **pages,
- unsigned long *out_pages,
- unsigned long *total_in,
- unsigned long *total_out)
+int zlib_compress_pages(struct list_head *ws, struct address_space *mapping,
+ u64 start, struct page **pages, unsigned long *out_pages,
+ unsigned long *total_in, unsigned long *total_out)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
int ret;
@@ -228,7 +224,7 @@ static int zlib_compress_pages(struct list_head *ws,
return ret;
}
-static int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
+int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
int ret = 0, ret2;
@@ -319,10 +315,9 @@ static int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
return ret;
}
-static int zlib_decompress(struct list_head *ws, unsigned char *data_in,
- struct page *dest_page,
- unsigned long start_byte,
- size_t srclen, size_t destlen)
+int zlib_decompress(struct list_head *ws, unsigned char *data_in,
+ struct page *dest_page, unsigned long start_byte, size_t srclen,
+ size_t destlen)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
int ret = 0;
diff --git a/fs/btrfs/zstd.c b/fs/btrfs/zstd.c
index 764d47b..b372822 100644
--- a/fs/btrfs/zstd.c
+++ b/fs/btrfs/zstd.c
@@ -367,13 +367,9 @@ static struct list_head *zstd_alloc_workspace(unsigned int level)
return ERR_PTR(-ENOMEM);
}
-static int zstd_compress_pages(struct list_head *ws,
- struct address_space *mapping,
- u64 start,
- struct page **pages,
- unsigned long *out_pages,
- unsigned long *total_in,
- unsigned long *total_out)
+int zstd_compress_pages(struct list_head *ws, struct address_space *mapping,
+ u64 start, struct page **pages, unsigned long *out_pages,
+ unsigned long *total_in, unsigned long *total_out)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
ZSTD_CStream *stream;
@@ -548,7 +544,7 @@ static int zstd_compress_pages(struct list_head *ws,
return ret;
}
-static int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
+int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
struct page **pages_in = cb->compressed_pages;
@@ -626,10 +622,9 @@ static int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb)
return ret;
}
-static int zstd_decompress(struct list_head *ws, unsigned char *data_in,
- struct page *dest_page,
- unsigned long start_byte,
- size_t srclen, size_t destlen)
+int zstd_decompress(struct list_head *ws, unsigned char *data_in,
+ struct page *dest_page, unsigned long start_byte, size_t srclen,
+ size_t destlen)
{
struct workspace *workspace = list_entry(ws, struct workspace, list);
ZSTD_DStream *stream;