diff options
Diffstat (limited to 'include/linux/bio.h')
| -rw-r--r-- | include/linux/bio.h | 142 |
1 files changed, 66 insertions, 76 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index ce547a25e8ae..7380b094dcca 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -21,12 +21,8 @@ #include <linux/highmem.h> #include <linux/mempool.h> #include <linux/ioprio.h> -#include <linux/bug.h> #ifdef CONFIG_BLOCK - -#include <asm/io.h> - /* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */ #include <linux/blk_types.h> @@ -67,8 +63,12 @@ #define bio_multiple_segments(bio) \ ((bio)->bi_iter.bi_size != bio_iovec(bio).bv_len) -#define bio_sectors(bio) ((bio)->bi_iter.bi_size >> 9) -#define bio_end_sector(bio) ((bio)->bi_iter.bi_sector + bio_sectors((bio))) + +#define bvec_iter_sectors(iter) ((iter).bi_size >> 9) +#define bvec_iter_end_sector(iter) ((iter).bi_sector + bvec_iter_sectors((iter))) + +#define bio_sectors(bio) bvec_iter_sectors((bio)->bi_iter) +#define bio_end_sector(bio) bvec_iter_end_sector((bio)->bi_iter) /* * Return the data direction, READ or WRITE. @@ -123,31 +123,10 @@ static inline void *bio_data(struct bio *bio) return NULL; } -/* - * will die - */ -#define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset) - -/* - * merge helpers etc - */ - -/* Default implementation of BIOVEC_PHYS_MERGEABLE */ -#define __BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ - ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) - -/* - * allow arch override, for eg virtualized architectures (put in asm/io.h) - */ -#ifndef BIOVEC_PHYS_MERGEABLE -#define BIOVEC_PHYS_MERGEABLE(vec1, vec2) \ - __BIOVEC_PHYS_MERGEABLE(vec1, vec2) -#endif - -#define __BIO_SEG_BOUNDARY(addr1, addr2, mask) \ - (((addr1) | (mask)) == (((addr2) - 1) | (mask))) -#define BIOVEC_SEG_BOUNDARY(q, b1, b2) \ - __BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, queue_segment_boundary((q))) +static inline bool bio_full(struct bio *bio) +{ + return bio->bi_vcnt >= bio->bi_max_vecs; +} /* * drivers should _never_ use the all version - the bio may have been split @@ -161,27 +140,11 @@ static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, { iter->bi_sector += bytes >> 9; - if (bio_no_advance_iter(bio)) { + if (bio_no_advance_iter(bio)) iter->bi_size -= bytes; - iter->bi_done += bytes; - } else { + else bvec_iter_advance(bio->bi_io_vec, iter, bytes); /* TODO: It is reasonable to complete bio with error here. */ - } -} - -static inline bool bio_rewind_iter(struct bio *bio, struct bvec_iter *iter, - unsigned int bytes) -{ - iter->bi_sector -= bytes >> 9; - - if (bio_no_advance_iter(bio)) { - iter->bi_size += bytes; - iter->bi_done -= bytes; - return true; - } - - return bvec_iter_rewind(bio->bi_io_vec, iter, bytes); } #define __bio_for_each_segment(bvl, bio, iter, start) \ @@ -344,6 +307,8 @@ struct bio_integrity_payload { unsigned short bip_max_vcnt; /* integrity bio_vec slots */ unsigned short bip_flags; /* control flags */ + struct bvec_iter bio_iter; /* for rewinding parent bio */ + struct work_struct bip_work; /* I/O completion */ struct bio_vec *bip_vec; @@ -406,26 +371,26 @@ static inline struct bio *bio_next_split(struct bio *bio, int sectors, return bio_split(bio, sectors, gfp, bs); } -extern struct bio_set *bioset_create(unsigned int, unsigned int, int flags); enum { BIOSET_NEED_BVECS = BIT(0), BIOSET_NEED_RESCUER = BIT(1), }; -extern void bioset_free(struct bio_set *); -extern mempool_t *biovec_create_pool(int pool_entries); +extern int bioset_init(struct bio_set *, unsigned int, unsigned int, int flags); +extern void bioset_exit(struct bio_set *); +extern int biovec_init_pool(mempool_t *pool, int pool_entries); +extern int bioset_init_from_src(struct bio_set *bs, struct bio_set *src); extern struct bio *bio_alloc_bioset(gfp_t, unsigned int, struct bio_set *); extern void bio_put(struct bio *); extern void __bio_clone_fast(struct bio *, struct bio *); extern struct bio *bio_clone_fast(struct bio *, gfp_t, struct bio_set *); -extern struct bio *bio_clone_bioset(struct bio *, gfp_t, struct bio_set *bs); -extern struct bio_set *fs_bio_set; +extern struct bio_set fs_bio_set; static inline struct bio *bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs) { - return bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set); + return bio_alloc_bioset(gfp_mask, nr_iovecs, &fs_bio_set); } static inline struct bio *bio_kmalloc(gfp_t gfp_mask, unsigned int nr_iovecs) @@ -433,12 +398,6 @@ static inline struct bio *bio_kmalloc(gfp_t gfp_mask, unsigned int nr_iovecs) return bio_alloc_bioset(gfp_mask, nr_iovecs, NULL); } -static inline struct bio *bio_clone_kmalloc(struct bio *bio, gfp_t gfp_mask) -{ - return bio_clone_bioset(bio, gfp_mask, NULL); - -} - extern blk_qc_t submit_bio(struct bio *); extern void bio_endio(struct bio *); @@ -470,6 +429,10 @@ void bio_chain(struct bio *, struct bio *); extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int); extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *, unsigned int, unsigned int); +bool __bio_try_merge_page(struct bio *bio, struct page *page, + unsigned int len, unsigned int off); +void __bio_add_page(struct bio *bio, struct page *page, + unsigned int len, unsigned int off); int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter); struct rq_map_data; extern struct bio *bio_map_user_iov(struct request_queue *, @@ -482,9 +445,9 @@ extern struct bio *bio_copy_kern(struct request_queue *, void *, unsigned int, extern void bio_set_pages_dirty(struct bio *bio); extern void bio_check_pages_dirty(struct bio *bio); -void generic_start_io_acct(struct request_queue *q, int rw, +void generic_start_io_acct(struct request_queue *q, int op, unsigned long sectors, struct hd_struct *part); -void generic_end_io_acct(struct request_queue *q, int rw, +void generic_end_io_acct(struct request_queue *q, int op, struct hd_struct *part, unsigned long start_time); @@ -499,7 +462,10 @@ static inline void bio_flush_dcache_pages(struct bio *bi) } #endif +extern void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter, + struct bio *src, struct bvec_iter *src_iter); extern void bio_copy_data(struct bio *dst, struct bio *src); +extern void bio_list_copy_data(struct bio *dst, struct bio *src); extern void bio_free_pages(struct bio *bio); extern struct bio *bio_copy_user_iov(struct request_queue *, @@ -507,7 +473,13 @@ extern struct bio *bio_copy_user_iov(struct request_queue *, struct iov_iter *, gfp_t); extern int bio_uncopy_user(struct bio *); -void zero_fill_bio(struct bio *bio); +void zero_fill_bio_iter(struct bio *bio, struct bvec_iter iter); + +static inline void zero_fill_bio(struct bio *bio) +{ + zero_fill_bio_iter(bio, bio->bi_iter); +} + extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *); extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int); extern unsigned int bvec_nr_vecs(unsigned short idx); @@ -519,27 +491,40 @@ do { \ bio_clear_flag(bio, BIO_THROTTLED);\ (bio)->bi_disk = (bdev)->bd_disk; \ (bio)->bi_partno = (bdev)->bd_partno; \ + bio_associate_blkg(bio); \ } while (0) #define bio_copy_dev(dst, src) \ do { \ (dst)->bi_disk = (src)->bi_disk; \ (dst)->bi_partno = (src)->bi_partno; \ + bio_clone_blkg_association(dst, src); \ } while (0) #define bio_dev(bio) \ disk_devt((bio)->bi_disk) +#if defined(CONFIG_MEMCG) && defined(CONFIG_BLK_CGROUP) +void bio_associate_blkg_from_page(struct bio *bio, struct page *page); +#else +static inline void bio_associate_blkg_from_page(struct bio *bio, + struct page *page) { } +#endif + #ifdef CONFIG_BLK_CGROUP -int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css); -void bio_disassociate_task(struct bio *bio); -void bio_clone_blkcg_association(struct bio *dst, struct bio *src); +void bio_disassociate_blkg(struct bio *bio); +void bio_associate_blkg(struct bio *bio); +void bio_associate_blkg_from_css(struct bio *bio, + struct cgroup_subsys_state *css); +void bio_clone_blkg_association(struct bio *dst, struct bio *src); #else /* CONFIG_BLK_CGROUP */ -static inline int bio_associate_blkcg(struct bio *bio, - struct cgroup_subsys_state *blkcg_css) { return 0; } -static inline void bio_disassociate_task(struct bio *bio) { } -static inline void bio_clone_blkcg_association(struct bio *dst, - struct bio *src) { } +static inline void bio_disassociate_blkg(struct bio *bio) { } +static inline void bio_associate_blkg(struct bio *bio) { } +static inline void bio_associate_blkg_from_css(struct bio *bio, + struct cgroup_subsys_state *css) +{ } +static inline void bio_clone_blkg_association(struct bio *dst, + struct bio *src) { } #endif /* CONFIG_BLK_CGROUP */ #ifdef CONFIG_HIGHMEM @@ -722,11 +707,11 @@ struct bio_set { struct kmem_cache *bio_slab; unsigned int front_pad; - mempool_t *bio_pool; - mempool_t *bvec_pool; + mempool_t bio_pool; + mempool_t bvec_pool; #if defined(CONFIG_BLK_DEV_INTEGRITY) - mempool_t *bio_integrity_pool; - mempool_t *bvec_integrity_pool; + mempool_t bio_integrity_pool; + mempool_t bvec_integrity_pool; #endif /* @@ -745,6 +730,11 @@ struct biovec_slab { struct kmem_cache *slab; }; +static inline bool bioset_initialized(struct bio_set *bs) +{ + return bs->bio_slab != NULL; +} + /* * a small number of entries is fine, not going to be performance critical. * basically we just need to survive |
