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btrfs: use bio iterators for the decompression handlers

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Pass the full bio to the decompression routines and use bio iterators
to iterate over the data in the bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2016-11-25 09:07:46 +01:00 • committed by David Sterba
parent 0c476a5d7f
commit 974b1adc3b
4 changed files with 56 additions and 113 deletions
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12
fs/btrfs/compression.h
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@ -34,9 +34,7 @@ int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page,
unsigned long start_byte, size_t srclen, size_t destlen);
int btrfs_decompress_buf2page(char *buf, unsigned long buf_start,
unsigned long total_out, u64 disk_start,
struct bio_vec *bvec, int vcnt,
unsigned long *pg_index,
unsigned long *pg_offset);
struct bio *bio);
int btrfs_submit_compressed_write(struct inode *inode, u64 start,
unsigned long len, u64 disk_start,
@ -45,9 +43,6 @@ int btrfs_submit_compressed_write(struct inode *inode, u64 start,
unsigned long nr_pages);
int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags);
void btrfs_clear_biovec_end(struct bio_vec *bvec, int vcnt,
unsigned long pg_index,
unsigned long pg_offset);
enum btrfs_compression_type {
BTRFS_COMPRESS_NONE = 0,
@ -72,11 +67,10 @@ struct btrfs_compress_op {
unsigned long *total_out,
unsigned long max_out);
int (*decompress_biovec)(struct list_head *workspace,
int (*decompress_bio)(struct list_head *workspace,
struct page **pages_in,
u64 disk_start,
struct bio_vec *bvec,
int vcnt,
struct bio *orig_bio,
size_t srclen);
int (*decompress)(struct list_head *workspace,