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#ifndef _BCACHE_IO_H
#define _BCACHE_IO_H
#include <linux/hash.h>
#include "io_types.h"
#define to_wbio(_bio) \
container_of((_bio), struct bch_write_bio, bio)
#define to_rbio(_bio) \
container_of((_bio), struct bch_read_bio, bio)
void bch2_bio_free_pages_pool(struct bch_fs *, struct bio *);
void bch2_bio_alloc_pages_pool(struct bch_fs *, struct bio *, size_t);
enum bch_write_flags {
BCH_WRITE_ALLOC_NOWAIT = (1 << 0),
BCH_WRITE_DISCARD = (1 << 1),
BCH_WRITE_CACHED = (1 << 2),
BCH_WRITE_FLUSH = (1 << 3),
BCH_WRITE_DISCARD_ON_ERROR = (1 << 4),
BCH_WRITE_DATA_COMPRESSED = (1 << 5),
/* Internal: */
BCH_WRITE_JOURNAL_SEQ_PTR = (1 << 6),
BCH_WRITE_DONE = (1 << 7),
BCH_WRITE_LOOPED = (1 << 8),
};
static inline u64 *op_journal_seq(struct bch_write_op *op)
{
return (op->flags & BCH_WRITE_JOURNAL_SEQ_PTR)
? op->journal_seq_p : &op->journal_seq;
}
static inline struct write_point *foreground_write_point(struct bch_fs *c,
unsigned long v)
{
return c->write_points +
hash_long(v, ilog2(ARRAY_SIZE(c->write_points)));
}
void bch2_write_op_init(struct bch_write_op *, struct bch_fs *,
struct bch_write_bio *,
struct disk_reservation, struct write_point *,
struct bpos, u64 *, unsigned);
void bch2_write(struct closure *);
struct cache_promote_op;
struct extent_pick_ptr;
void bch2_read_extent_iter(struct bch_fs *, struct bch_read_bio *,
struct bvec_iter, struct bkey_s_c k,
struct extent_pick_ptr *, unsigned);
static inline void bch2_read_extent(struct bch_fs *c,
struct bch_read_bio *orig,
struct bkey_s_c k,
struct extent_pick_ptr *pick,
unsigned flags)
{
bch2_read_extent_iter(c, orig, orig->bio.bi_iter,
k, pick, flags);
}
enum bch_read_flags {
BCH_READ_FORCE_BOUNCE = 1 << 0,
BCH_READ_RETRY_IF_STALE = 1 << 1,
BCH_READ_PROMOTE = 1 << 2,
BCH_READ_IS_LAST = 1 << 3,
BCH_READ_MAY_REUSE_BIO = 1 << 4,
BCH_READ_USER_MAPPED = 1 << 5,
};
void bch2_read(struct bch_fs *, struct bch_read_bio *, u64);
void bch2_submit_wbio_replicas(struct bch_write_bio *, struct bch_fs *,
const struct bkey_i *);
int bch2_discard(struct bch_fs *, struct bpos, struct bpos,
struct bversion, struct disk_reservation *,
struct extent_insert_hook *, u64 *);
void bch2_read_retry_work(struct work_struct *);
void bch2_wake_delayed_writes(unsigned long data);
#endif /* _BCACHE_IO_H */
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