diff options
author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 17:00:02 -0500 |
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committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-01-16 17:17:23 -0500 |
commit | b5fd066153c40a70a29caa1ea7987723ab687763 (patch) | |
tree | 6d43a8b0a90d549a54c65565ac96c92b3e84b594 /c_src/include/linux/bio.h | |
parent | 06ff8b55b70fda44d91b31b5511fafd1680a8934 (diff) |
Move c_src dirs back to toplevel
We just wanted c sourcefiles out of the top level, not c source
directories.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'c_src/include/linux/bio.h')
-rw-r--r-- | c_src/include/linux/bio.h | 434 |
1 files changed, 0 insertions, 434 deletions
diff --git a/c_src/include/linux/bio.h b/c_src/include/linux/bio.h deleted file mode 100644 index 1f8acca2..00000000 --- a/c_src/include/linux/bio.h +++ /dev/null @@ -1,434 +0,0 @@ -/* - * 2.5 block I/O model - * - * Copyright (C) 2001 Jens Axboe <axboe@suse.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public Licens - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111- - */ -#ifndef __LINUX_BIO_H -#define __LINUX_BIO_H - -#include <linux/mempool.h> -#include <linux/bug.h> -#include <linux/err.h> - -#include <linux/blkdev.h> -#include <linux/blk_types.h> -#include <linux/workqueue.h> - -#define bio_prio(bio) (bio)->bi_ioprio -#define bio_set_prio(bio, prio) ((bio)->bi_ioprio = prio) - -#define bio_iter_iovec(bio, iter) \ - bvec_iter_bvec((bio)->bi_io_vec, (iter)) - -#define bio_iter_page(bio, iter) \ - bvec_iter_page((bio)->bi_io_vec, (iter)) -#define bio_iter_len(bio, iter) \ - bvec_iter_len((bio)->bi_io_vec, (iter)) -#define bio_iter_offset(bio, iter) \ - bvec_iter_offset((bio)->bi_io_vec, (iter)) - -#define bio_page(bio) bio_iter_page((bio), (bio)->bi_iter) -#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))) - -#define bio_sectors(bio) bvec_iter_sectors((bio)->bi_iter) -#define bio_end_sector(bio) bvec_iter_end_sector((bio)->bi_iter) - -static inline bool bio_has_data(struct bio *bio) -{ - if (bio && - bio->bi_iter.bi_size && - bio_op(bio) != REQ_OP_DISCARD && - bio_op(bio) != REQ_OP_SECURE_ERASE) - return true; - - return false; -} - -static inline bool bio_no_advance_iter(struct bio *bio) -{ - return bio_op(bio) == REQ_OP_DISCARD || - bio_op(bio) == REQ_OP_SECURE_ERASE || - bio_op(bio) == REQ_OP_WRITE_SAME; -} - -static inline bool bio_is_rw(struct bio *bio) -{ - if (!bio_has_data(bio)) - return false; - - if (bio_no_advance_iter(bio)) - return false; - - return true; -} - -static inline bool bio_mergeable(struct bio *bio) -{ - if (bio->bi_opf & REQ_NOMERGE_FLAGS) - return false; - - return true; -} - -static inline unsigned int bio_cur_bytes(struct bio *bio) -{ - if (bio_has_data(bio)) - return bio_iovec(bio).bv_len; - else /* dataless requests such as discard */ - return bio->bi_iter.bi_size; -} - -static inline void *bio_data(struct bio *bio) -{ - if (bio_has_data(bio)) - return page_address(bio_page(bio)) + bio_offset(bio); - - return NULL; -} - -#define __bio_kmap_atomic(bio, iter) \ - (kmap_atomic(bio_iter_iovec((bio), (iter)).bv_page) + \ - bio_iter_iovec((bio), (iter)).bv_offset) - -#define __bio_kunmap_atomic(addr) kunmap_atomic(addr) - -static inline struct bio_vec *bio_next_segment(const struct bio *bio, - struct bvec_iter_all *iter) -{ - if (iter->idx >= bio->bi_vcnt) - return NULL; - - return &bio->bi_io_vec[iter->idx]; -} - -#define bio_for_each_segment_all(bvl, bio, iter) \ - for ((iter).idx = 0; (bvl = bio_next_segment((bio), &(iter))); (iter).idx++) - -static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter, - unsigned bytes) -{ - iter->bi_sector += bytes >> 9; - - if (bio_no_advance_iter(bio)) - iter->bi_size -= bytes; - else - bvec_iter_advance(bio->bi_io_vec, iter, bytes); -} - -#define __bio_for_each_segment(bvl, bio, iter, start) \ - for (iter = (start); \ - (iter).bi_size && \ - ((bvl = bio_iter_iovec((bio), (iter))), 1); \ - bio_advance_iter((bio), &(iter), (bvl).bv_len)) - -#define bio_for_each_segment(bvl, bio, iter) \ - __bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter) - -#define __bio_for_each_bvec(bvl, bio, iter, start) \ - __bio_for_each_segment(bvl, bio, iter, start) - -#define bio_iter_last(bvec, iter) ((iter).bi_size == (bvec).bv_len) - -static inline unsigned bio_segments(struct bio *bio) -{ - unsigned segs = 0; - struct bio_vec bv; - struct bvec_iter iter; - - /* - * We special case discard/write same, because they interpret bi_size - * differently: - */ - - if (bio_op(bio) == REQ_OP_DISCARD) - return 1; - - if (bio_op(bio) == REQ_OP_SECURE_ERASE) - return 1; - - if (bio_op(bio) == REQ_OP_WRITE_SAME) - return 1; - - bio_for_each_segment(bv, bio, iter) - segs++; - - return segs; -} - -static inline void bio_get(struct bio *bio) -{ - bio->bi_flags |= (1 << BIO_REFFED); - smp_mb__before_atomic(); - atomic_inc(&bio->__bi_cnt); -} - -static inline bool bio_flagged(struct bio *bio, unsigned int bit) -{ - return (bio->bi_flags & (1U << bit)) != 0; -} - -static inline void bio_set_flag(struct bio *bio, unsigned int bit) -{ - bio->bi_flags |= (1U << bit); -} - -static inline void bio_clear_flag(struct bio *bio, unsigned int bit) -{ - bio->bi_flags &= ~(1U << bit); -} - -extern struct bio *bio_split(struct bio *bio, int sectors, - gfp_t gfp, struct bio_set *bs); - -static inline struct bio *bio_next_split(struct bio *bio, int sectors, - gfp_t gfp, struct bio_set *bs) -{ - if (sectors >= bio_sectors(bio)) - return bio; - - return bio_split(bio, sectors, gfp, bs); -} - -struct bio_set { - unsigned int front_pad; - unsigned int back_pad; - mempool_t bio_pool; - mempool_t bvec_pool; -}; - - -static inline void bioset_free(struct bio_set *bs) -{ - kfree(bs); -} - -void bioset_exit(struct bio_set *); -int bioset_init(struct bio_set *, unsigned, unsigned, int); - -extern struct bio_set *bioset_create(unsigned int, unsigned int); -extern struct bio_set *bioset_create_nobvec(unsigned int, unsigned int); -enum { - BIOSET_NEED_BVECS = 1 << 0, - BIOSET_NEED_RESCUER = 1 << 1, -}; - -struct bio *bio_alloc_bioset(struct block_device *, unsigned, - blk_opf_t, gfp_t, struct bio_set *); -extern void bio_put(struct bio *); - -int bio_add_page(struct bio *, struct page *, unsigned, unsigned); - -struct bio *bio_alloc_clone(struct block_device *, struct bio *, - gfp_t, struct bio_set *); - -struct bio *bio_kmalloc(unsigned int, gfp_t); - -extern void bio_endio(struct bio *); - -extern void bio_advance(struct bio *, unsigned); - -extern void bio_reset(struct bio *, struct block_device *, unsigned); -void bio_chain(struct bio *, struct bio *); - -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); - -void bio_free_pages(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); -} - -#define bio_set_dev(bio, bdev) \ -do { \ - (bio)->bi_bdev = (bdev); \ -} while (0) - -#define bio_copy_dev(dst, src) \ -do { \ - (dst)->bi_bdev = (src)->bi_bdev; \ -} while (0) - -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; -} - -static inline char *__bio_kmap_irq(struct bio *bio, struct bvec_iter iter, - unsigned long *flags) -{ - return bvec_kmap_irq(&bio_iter_iovec(bio, iter), flags); -} -#define __bio_kunmap_irq(buf, flags) bvec_kunmap_irq(buf, flags) - -#define bio_kmap_irq(bio, flags) \ - __bio_kmap_irq((bio), (bio)->bi_iter, (flags)) -#define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags) - -struct bio_list { - struct bio *head; - struct bio *tail; -}; - -static inline int bio_list_empty(const struct bio_list *bl) -{ - return bl->head == NULL; -} - -static inline void bio_list_init(struct bio_list *bl) -{ - bl->head = bl->tail = NULL; -} - -#define BIO_EMPTY_LIST { NULL, NULL } - -#define bio_list_for_each(bio, bl) \ - for (bio = (bl)->head; bio; bio = bio->bi_next) - -static inline unsigned bio_list_size(const struct bio_list *bl) -{ - unsigned sz = 0; - struct bio *bio; - - bio_list_for_each(bio, bl) - sz++; - - return sz; -} - -static inline void bio_list_add(struct bio_list *bl, struct bio *bio) -{ - bio->bi_next = NULL; - - if (bl->tail) - bl->tail->bi_next = bio; - else - bl->head = bio; - - bl->tail = bio; -} - -static inline void bio_list_add_head(struct bio_list *bl, struct bio *bio) -{ - bio->bi_next = bl->head; - - bl->head = bio; - - if (!bl->tail) - bl->tail = bio; -} - -static inline void bio_list_merge(struct bio_list *bl, struct bio_list *bl2) -{ - if (!bl2->head) - return; - - if (bl->tail) - bl->tail->bi_next = bl2->head; - else - bl->head = bl2->head; - - bl->tail = bl2->tail; -} - -static inline void bio_list_merge_head(struct bio_list *bl, - struct bio_list *bl2) -{ - if (!bl2->head) - return; - - if (bl->head) - bl2->tail->bi_next = bl->head; - else - bl->tail = bl2->tail; - - bl->head = bl2->head; -} - -static inline struct bio *bio_list_peek(struct bio_list *bl) -{ - return bl->head; -} - -static inline struct bio *bio_list_pop(struct bio_list *bl) -{ - struct bio *bio = bl->head; - - if (bio) { - bl->head = bl->head->bi_next; - if (!bl->head) - bl->tail = NULL; - - bio->bi_next = NULL; - } - - return bio; -} - -static inline struct bio *bio_list_get(struct bio_list *bl) -{ - struct bio *bio = bl->head; - - bl->head = bl->tail = NULL; - - return bio; -} - -/* - * Increment chain count for the bio. Make sure the CHAIN flag update - * is visible before the raised count. - */ -static inline void bio_inc_remaining(struct bio *bio) -{ - bio_set_flag(bio, BIO_CHAIN); - smp_mb__before_atomic(); - atomic_inc(&bio->__bi_remaining); -} - -static inline void bio_init(struct bio *bio, - struct block_device *bdev, - struct bio_vec *table, - unsigned short max_vecs, - unsigned int opf) -{ - memset(bio, 0, sizeof(*bio)); - bio->bi_bdev = bdev; - bio->bi_opf = opf; - atomic_set(&bio->__bi_remaining, 1); - atomic_set(&bio->__bi_cnt, 1); - - bio->bi_io_vec = table; - bio->bi_max_vecs = max_vecs; -} - -#endif /* __LINUX_BIO_H */ |