diff options
Diffstat (limited to 'include/linux/bio.h')
| -rw-r--r-- | include/linux/bio.h | 71 |
1 files changed, 20 insertions, 51 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index a0b4cfdf62a4..00952e92eae1 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -5,7 +5,6 @@ #ifndef __LINUX_BIO_H #define __LINUX_BIO_H -#include <linux/highmem.h> #include <linux/mempool.h> #include <linux/ioprio.h> /* struct bio, bio_vec and BIO_* flags are defined in blk_types.h */ @@ -44,9 +43,6 @@ static inline unsigned int bio_max_segs(unsigned int nr_segs) #define bio_offset(bio) bio_iter_offset((bio), (bio)->bi_iter) #define bio_iovec(bio) bio_iter_iovec((bio), (bio)->bi_iter) -#define bio_multiple_segments(bio) \ - ((bio)->bi_iter.bi_size != bio_iovec(bio).bv_len) - #define bvec_iter_sectors(iter) ((iter).bi_size >> 9) #define bvec_iter_end_sector(iter) ((iter).bi_sector + bvec_iter_sectors((iter))) @@ -271,7 +267,7 @@ static inline void bio_clear_flag(struct bio *bio, unsigned int bit) static inline void bio_get_first_bvec(struct bio *bio, struct bio_vec *bv) { - *bv = bio_iovec(bio); + *bv = mp_bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter); } static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv) @@ -279,10 +275,9 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv) struct bvec_iter iter = bio->bi_iter; int idx; - if (unlikely(!bio_multiple_segments(bio))) { - *bv = bio_iovec(bio); - return; - } + bio_get_first_bvec(bio, bv); + if (bv->bv_len == bio->bi_iter.bi_size) + return; /* this bio only has a single bvec */ bio_advance_iter(bio, &iter, iter.bi_size); @@ -379,7 +374,7 @@ static inline void bip_set_seed(struct bio_integrity_payload *bip, #endif /* CONFIG_BLK_DEV_INTEGRITY */ -extern void bio_trim(struct bio *bio, int offset, int size); +void bio_trim(struct bio *bio, sector_t offset, sector_t size); extern struct bio *bio_split(struct bio *bio, int sectors, gfp_t gfp, struct bio_set *bs); @@ -405,6 +400,7 @@ static inline struct bio *bio_next_split(struct bio *bio, int sectors, enum { BIOSET_NEED_BVECS = BIT(0), BIOSET_NEED_RESCUER = BIT(1), + BIOSET_PERCPU_CACHE = BIT(2), }; extern int bioset_init(struct bio_set *, unsigned int, unsigned int, int flags); extern void bioset_exit(struct bio_set *); @@ -413,6 +409,8 @@ extern int bioset_init_from_src(struct bio_set *bs, struct bio_set *src); struct bio *bio_alloc_bioset(gfp_t gfp, unsigned short nr_iovecs, struct bio_set *bs); +struct bio *bio_alloc_kiocb(struct kiocb *kiocb, unsigned short nr_vecs, + struct bio_set *bs); struct bio *bio_kmalloc(gfp_t gfp_mask, unsigned short nr_iovecs); extern void bio_put(struct bio *); @@ -523,47 +521,6 @@ static inline void bio_clone_blkg_association(struct bio *dst, struct bio *src) { } #endif /* CONFIG_BLK_CGROUP */ -#ifdef CONFIG_HIGHMEM -/* - * remember never ever reenable interrupts between a bvec_kmap_irq and - * bvec_kunmap_irq! - */ -static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags) -{ - unsigned long addr; - - /* - * might not be a highmem page, but the preempt/irq count - * balancing is a lot nicer this way - */ - local_irq_save(*flags); - addr = (unsigned long) kmap_atomic(bvec->bv_page); - - BUG_ON(addr & ~PAGE_MASK); - - return (char *) addr + bvec->bv_offset; -} - -static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags) -{ - unsigned long ptr = (unsigned long) buffer & PAGE_MASK; - - kunmap_atomic((void *) ptr); - local_irq_restore(*flags); -} - -#else -static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags) -{ - return page_address(bvec->bv_page) + bvec->bv_offset; -} - -static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags) -{ - *flags = 0; -} -#endif - /* * BIO list management for use by remapping drivers (e.g. DM or MD) and loop. * @@ -703,6 +660,11 @@ struct bio_set { struct kmem_cache *bio_slab; unsigned int front_pad; + /* + * per-cpu bio alloc cache + */ + struct bio_alloc_cache __percpu *cache; + mempool_t bio_pool; mempool_t bvec_pool; #if defined(CONFIG_BLK_DEV_INTEGRITY) @@ -719,6 +681,11 @@ struct bio_set { struct bio_list rescue_list; struct work_struct rescue_work; struct workqueue_struct *rescue_workqueue; + + /* + * Hot un-plug notifier for the per-cpu cache, if used + */ + struct hlist_node cpuhp_dead; }; static inline bool bioset_initialized(struct bio_set *bs) @@ -822,4 +789,6 @@ static inline void bio_set_polled(struct bio *bio, struct kiocb *kiocb) bio->bi_opf |= REQ_NOWAIT; } +struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); + #endif /* __LINUX_BIO_H */ |