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btrfs: export compression and decompression callbacks

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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>
This commit is contained in:
David Sterba
2019-10-01 22:38:34 +02:00
parent a60adce85f
commit c4bf665a31
4 changed files with 45 additions and 36 deletions
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19
fs/btrfs/lzo.c
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@@ -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 @@ out:
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 @@ done:
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;