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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef BLK_INTERNAL_H3#define BLK_INTERNAL_H4 5#include <linux/bio-integrity.h>6#include <linux/blk-crypto.h>7#include <linux/memblock.h> /* for max_pfn/max_low_pfn */8#include <linux/sched/sysctl.h>9#include <linux/timekeeping.h>10#include <xen/xen.h>11#include "blk-crypto-internal.h"12 13struct elevator_type;14 15/* Max future timer expiry for timeouts */16#define BLK_MAX_TIMEOUT (5 * HZ)17 18extern struct dentry *blk_debugfs_root;19 20struct blk_flush_queue {21 spinlock_t mq_flush_lock;22 unsigned int flush_pending_idx:1;23 unsigned int flush_running_idx:1;24 blk_status_t rq_status;25 unsigned long flush_pending_since;26 struct list_head flush_queue[2];27 unsigned long flush_data_in_flight;28 struct request *flush_rq;29};30 31bool is_flush_rq(struct request *req);32 33struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size,34 gfp_t flags);35void blk_free_flush_queue(struct blk_flush_queue *q);36 37void blk_freeze_queue(struct request_queue *q);38void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic);39void blk_queue_start_drain(struct request_queue *q);40int __bio_queue_enter(struct request_queue *q, struct bio *bio);41void submit_bio_noacct_nocheck(struct bio *bio);42void bio_await_chain(struct bio *bio);43 44static inline bool blk_try_enter_queue(struct request_queue *q, bool pm)45{46 rcu_read_lock();47 if (!percpu_ref_tryget_live_rcu(&q->q_usage_counter))48 goto fail;49 50 /*51 * The code that increments the pm_only counter must ensure that the52 * counter is globally visible before the queue is unfrozen.53 */54 if (blk_queue_pm_only(q) &&55 (!pm || queue_rpm_status(q) == RPM_SUSPENDED))56 goto fail_put;57 58 rcu_read_unlock();59 return true;60 61fail_put:62 blk_queue_exit(q);63fail:64 rcu_read_unlock();65 return false;66}67 68static inline int bio_queue_enter(struct bio *bio)69{70 struct request_queue *q = bdev_get_queue(bio->bi_bdev);71 72 if (blk_try_enter_queue(q, false))73 return 0;74 return __bio_queue_enter(q, bio);75}76 77static inline void blk_wait_io(struct completion *done)78{79 /* Prevent hang_check timer from firing at us during very long I/O */80 unsigned long timeout = sysctl_hung_task_timeout_secs * HZ / 2;81 82 if (timeout)83 while (!wait_for_completion_io_timeout(done, timeout))84 ;85 else86 wait_for_completion_io(done);87}88 89#define BIO_INLINE_VECS 490struct bio_vec *bvec_alloc(mempool_t *pool, unsigned short *nr_vecs,91 gfp_t gfp_mask);92void bvec_free(mempool_t *pool, struct bio_vec *bv, unsigned short nr_vecs);93 94bool bvec_try_merge_hw_page(struct request_queue *q, struct bio_vec *bv,95 struct page *page, unsigned len, unsigned offset,96 bool *same_page);97 98static inline bool biovec_phys_mergeable(struct request_queue *q,99 struct bio_vec *vec1, struct bio_vec *vec2)100{101 unsigned long mask = queue_segment_boundary(q);102 phys_addr_t addr1 = bvec_phys(vec1);103 phys_addr_t addr2 = bvec_phys(vec2);104 105 /*106 * Merging adjacent physical pages may not work correctly under KMSAN107 * if their metadata pages aren't adjacent. Just disable merging.108 */109 if (IS_ENABLED(CONFIG_KMSAN))110 return false;111 112 if (addr1 + vec1->bv_len != addr2)113 return false;114 if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2->bv_page))115 return false;116 if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask))117 return false;118 return true;119}120 121static inline bool __bvec_gap_to_prev(const struct queue_limits *lim,122 struct bio_vec *bprv, unsigned int offset)123{124 return (offset & lim->virt_boundary_mask) ||125 ((bprv->bv_offset + bprv->bv_len) & lim->virt_boundary_mask);126}127 128/*129 * Check if adding a bio_vec after bprv with offset would create a gap in130 * the SG list. Most drivers don't care about this, but some do.131 */132static inline bool bvec_gap_to_prev(const struct queue_limits *lim,133 struct bio_vec *bprv, unsigned int offset)134{135 if (!lim->virt_boundary_mask)136 return false;137 return __bvec_gap_to_prev(lim, bprv, offset);138}139 140static inline bool rq_mergeable(struct request *rq)141{142 if (blk_rq_is_passthrough(rq))143 return false;144 145 if (req_op(rq) == REQ_OP_FLUSH)146 return false;147 148 if (req_op(rq) == REQ_OP_WRITE_ZEROES)149 return false;150 151 if (req_op(rq) == REQ_OP_ZONE_APPEND)152 return false;153 154 if (rq->cmd_flags & REQ_NOMERGE_FLAGS)155 return false;156 if (rq->rq_flags & RQF_NOMERGE_FLAGS)157 return false;158 159 return true;160}161 162/*163 * There are two different ways to handle DISCARD merges:164 * 1) If max_discard_segments > 1, the driver treats every bio as a range and165 * send the bios to controller together. The ranges don't need to be166 * contiguous.167 * 2) Otherwise, the request will be normal read/write requests. The ranges168 * need to be contiguous.169 */170static inline bool blk_discard_mergable(struct request *req)171{172 if (req_op(req) == REQ_OP_DISCARD &&173 queue_max_discard_segments(req->q) > 1)174 return true;175 return false;176}177 178static inline unsigned int blk_rq_get_max_segments(struct request *rq)179{180 if (req_op(rq) == REQ_OP_DISCARD)181 return queue_max_discard_segments(rq->q);182 return queue_max_segments(rq->q);183}184 185static inline unsigned int blk_queue_get_max_sectors(struct request *rq)186{187 struct request_queue *q = rq->q;188 enum req_op op = req_op(rq);189 190 if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))191 return min(q->limits.max_discard_sectors,192 UINT_MAX >> SECTOR_SHIFT);193 194 if (unlikely(op == REQ_OP_WRITE_ZEROES))195 return q->limits.max_write_zeroes_sectors;196 197 if (rq->cmd_flags & REQ_ATOMIC)198 return q->limits.atomic_write_max_sectors;199 200 return q->limits.max_sectors;201}202 203#ifdef CONFIG_BLK_DEV_INTEGRITY204void blk_flush_integrity(void);205void bio_integrity_free(struct bio *bio);206 207/*208 * Integrity payloads can either be owned by the submitter, in which case209 * bio_uninit will free them, or owned and generated by the block layer,210 * in which case we'll verify them here (for reads) and free them before211 * the bio is handed back to the submitted.212 */213bool __bio_integrity_endio(struct bio *bio);214static inline bool bio_integrity_endio(struct bio *bio)215{216 struct bio_integrity_payload *bip = bio_integrity(bio);217 218 if (bip && (bip->bip_flags & BIP_BLOCK_INTEGRITY))219 return __bio_integrity_endio(bio);220 return true;221}222 223bool blk_integrity_merge_rq(struct request_queue *, struct request *,224 struct request *);225bool blk_integrity_merge_bio(struct request_queue *, struct request *,226 struct bio *);227 228static inline bool integrity_req_gap_back_merge(struct request *req,229 struct bio *next)230{231 struct bio_integrity_payload *bip = bio_integrity(req->bio);232 struct bio_integrity_payload *bip_next = bio_integrity(next);233 234 return bvec_gap_to_prev(&req->q->limits,235 &bip->bip_vec[bip->bip_vcnt - 1],236 bip_next->bip_vec[0].bv_offset);237}238 239static inline bool integrity_req_gap_front_merge(struct request *req,240 struct bio *bio)241{242 struct bio_integrity_payload *bip = bio_integrity(bio);243 struct bio_integrity_payload *bip_next = bio_integrity(req->bio);244 245 return bvec_gap_to_prev(&req->q->limits,246 &bip->bip_vec[bip->bip_vcnt - 1],247 bip_next->bip_vec[0].bv_offset);248}249 250extern const struct attribute_group blk_integrity_attr_group;251#else /* CONFIG_BLK_DEV_INTEGRITY */252static inline bool blk_integrity_merge_rq(struct request_queue *rq,253 struct request *r1, struct request *r2)254{255 return true;256}257static inline bool blk_integrity_merge_bio(struct request_queue *rq,258 struct request *r, struct bio *b)259{260 return true;261}262static inline bool integrity_req_gap_back_merge(struct request *req,263 struct bio *next)264{265 return false;266}267static inline bool integrity_req_gap_front_merge(struct request *req,268 struct bio *bio)269{270 return false;271}272 273static inline void blk_flush_integrity(void)274{275}276static inline bool bio_integrity_endio(struct bio *bio)277{278 return true;279}280static inline void bio_integrity_free(struct bio *bio)281{282}283#endif /* CONFIG_BLK_DEV_INTEGRITY */284 285unsigned long blk_rq_timeout(unsigned long timeout);286void blk_add_timer(struct request *req);287 288enum bio_merge_status {289 BIO_MERGE_OK,290 BIO_MERGE_NONE,291 BIO_MERGE_FAILED,292};293 294enum bio_merge_status bio_attempt_back_merge(struct request *req,295 struct bio *bio, unsigned int nr_segs);296bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,297 unsigned int nr_segs);298bool blk_bio_list_merge(struct request_queue *q, struct list_head *list,299 struct bio *bio, unsigned int nr_segs);300 301/*302 * Plug flush limits303 */304#define BLK_MAX_REQUEST_COUNT 32305#define BLK_PLUG_FLUSH_SIZE (128 * 1024)306 307/*308 * Internal elevator interface309 */310#define ELV_ON_HASH(rq) ((rq)->rq_flags & RQF_HASHED)311 312bool blk_insert_flush(struct request *rq);313 314int elevator_switch(struct request_queue *q, struct elevator_type *new_e);315void elevator_disable(struct request_queue *q);316void elevator_exit(struct request_queue *q);317int elv_register_queue(struct request_queue *q, bool uevent);318void elv_unregister_queue(struct request_queue *q);319 320ssize_t part_size_show(struct device *dev, struct device_attribute *attr,321 char *buf);322ssize_t part_stat_show(struct device *dev, struct device_attribute *attr,323 char *buf);324ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,325 char *buf);326ssize_t part_fail_show(struct device *dev, struct device_attribute *attr,327 char *buf);328ssize_t part_fail_store(struct device *dev, struct device_attribute *attr,329 const char *buf, size_t count);330ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);331ssize_t part_timeout_store(struct device *, struct device_attribute *,332 const char *, size_t);333 334struct bio *bio_split_discard(struct bio *bio, const struct queue_limits *lim,335 unsigned *nsegs);336struct bio *bio_split_write_zeroes(struct bio *bio,337 const struct queue_limits *lim, unsigned *nsegs);338struct bio *bio_split_rw(struct bio *bio, const struct queue_limits *lim,339 unsigned *nr_segs);340struct bio *bio_split_zone_append(struct bio *bio,341 const struct queue_limits *lim, unsigned *nr_segs);342 343/*344 * All drivers must accept single-segments bios that are smaller than PAGE_SIZE.345 *346 * This is a quick and dirty check that relies on the fact that bi_io_vec[0] is347 * always valid if a bio has data. The check might lead to occasional false348 * positives when bios are cloned, but compared to the performance impact of349 * cloned bios themselves the loop below doesn't matter anyway.350 */351static inline bool bio_may_need_split(struct bio *bio,352 const struct queue_limits *lim)353{354 return lim->chunk_sectors || bio->bi_vcnt != 1 ||355 bio->bi_io_vec->bv_len + bio->bi_io_vec->bv_offset > PAGE_SIZE;356}357 358/**359 * __bio_split_to_limits - split a bio to fit the queue limits360 * @bio: bio to be split361 * @lim: queue limits to split based on362 * @nr_segs: returns the number of segments in the returned bio363 *364 * Check if @bio needs splitting based on the queue limits, and if so split off365 * a bio fitting the limits from the beginning of @bio and return it. @bio is366 * shortened to the remainder and re-submitted.367 *368 * The split bio is allocated from @q->bio_split, which is provided by the369 * block layer.370 */371static inline struct bio *__bio_split_to_limits(struct bio *bio,372 const struct queue_limits *lim, unsigned int *nr_segs)373{374 switch (bio_op(bio)) {375 case REQ_OP_READ:376 case REQ_OP_WRITE:377 if (bio_may_need_split(bio, lim))378 return bio_split_rw(bio, lim, nr_segs);379 *nr_segs = 1;380 return bio;381 case REQ_OP_ZONE_APPEND:382 return bio_split_zone_append(bio, lim, nr_segs);383 case REQ_OP_DISCARD:384 case REQ_OP_SECURE_ERASE:385 return bio_split_discard(bio, lim, nr_segs);386 case REQ_OP_WRITE_ZEROES:387 return bio_split_write_zeroes(bio, lim, nr_segs);388 default:389 /* other operations can't be split */390 *nr_segs = 0;391 return bio;392 }393}394 395int ll_back_merge_fn(struct request *req, struct bio *bio,396 unsigned int nr_segs);397bool blk_attempt_req_merge(struct request_queue *q, struct request *rq,398 struct request *next);399unsigned int blk_recalc_rq_segments(struct request *rq);400bool blk_rq_merge_ok(struct request *rq, struct bio *bio);401enum elv_merge blk_try_merge(struct request *rq, struct bio *bio);402 403int blk_set_default_limits(struct queue_limits *lim);404void blk_apply_bdi_limits(struct backing_dev_info *bdi,405 struct queue_limits *lim);406int blk_dev_init(void);407 408/*409 * Contribute to IO statistics IFF:410 *411 * a) it's attached to a gendisk, and412 * b) the queue had IO stats enabled when this request was started413 */414static inline bool blk_do_io_stat(struct request *rq)415{416 return (rq->rq_flags & RQF_IO_STAT) && !blk_rq_is_passthrough(rq);417}418 419void update_io_ticks(struct block_device *part, unsigned long now, bool end);420unsigned int part_in_flight(struct block_device *part);421 422static inline void req_set_nomerge(struct request_queue *q, struct request *req)423{424 req->cmd_flags |= REQ_NOMERGE;425 if (req == q->last_merge)426 q->last_merge = NULL;427}428 429/*430 * Internal io_context interface431 */432struct io_cq *ioc_find_get_icq(struct request_queue *q);433struct io_cq *ioc_lookup_icq(struct request_queue *q);434#ifdef CONFIG_BLK_ICQ435void ioc_clear_queue(struct request_queue *q);436#else437static inline void ioc_clear_queue(struct request_queue *q)438{439}440#endif /* CONFIG_BLK_ICQ */441 442struct bio *__blk_queue_bounce(struct bio *bio, struct request_queue *q);443 444static inline bool blk_queue_may_bounce(struct request_queue *q)445{446 return IS_ENABLED(CONFIG_BOUNCE) &&447 (q->limits.features & BLK_FEAT_BOUNCE_HIGH) &&448 max_low_pfn >= max_pfn;449}450 451static inline struct bio *blk_queue_bounce(struct bio *bio,452 struct request_queue *q)453{454 if (unlikely(blk_queue_may_bounce(q) && bio_has_data(bio)))455 return __blk_queue_bounce(bio, q);456 return bio;457}458 459#ifdef CONFIG_BLK_DEV_ZONED460void disk_init_zone_resources(struct gendisk *disk);461void disk_free_zone_resources(struct gendisk *disk);462static inline bool bio_zone_write_plugging(struct bio *bio)463{464 return bio_flagged(bio, BIO_ZONE_WRITE_PLUGGING);465}466static inline bool bio_is_zone_append(struct bio *bio)467{468 return bio_op(bio) == REQ_OP_ZONE_APPEND ||469 bio_flagged(bio, BIO_EMULATES_ZONE_APPEND);470}471void blk_zone_write_plug_bio_merged(struct bio *bio);472void blk_zone_write_plug_init_request(struct request *rq);473static inline void blk_zone_update_request_bio(struct request *rq,474 struct bio *bio)475{476 /*477 * For zone append requests, the request sector indicates the location478 * at which the BIO data was written. Return this value to the BIO479 * issuer through the BIO iter sector.480 * For plugged zone writes, which include emulated zone append, we need481 * the original BIO sector so that blk_zone_write_plug_bio_endio() can482 * lookup the zone write plug.483 */484 if (req_op(rq) == REQ_OP_ZONE_APPEND || bio_zone_write_plugging(bio))485 bio->bi_iter.bi_sector = rq->__sector;486}487void blk_zone_write_plug_bio_endio(struct bio *bio);488static inline void blk_zone_bio_endio(struct bio *bio)489{490 /*491 * For write BIOs to zoned devices, signal the completion of the BIO so492 * that the next write BIO can be submitted by zone write plugging.493 */494 if (bio_zone_write_plugging(bio))495 blk_zone_write_plug_bio_endio(bio);496}497 498void blk_zone_write_plug_finish_request(struct request *rq);499static inline void blk_zone_finish_request(struct request *rq)500{501 if (rq->rq_flags & RQF_ZONE_WRITE_PLUGGING)502 blk_zone_write_plug_finish_request(rq);503}504int blkdev_report_zones_ioctl(struct block_device *bdev, unsigned int cmd,505 unsigned long arg);506int blkdev_zone_mgmt_ioctl(struct block_device *bdev, blk_mode_t mode,507 unsigned int cmd, unsigned long arg);508#else /* CONFIG_BLK_DEV_ZONED */509static inline void disk_init_zone_resources(struct gendisk *disk)510{511}512static inline void disk_free_zone_resources(struct gendisk *disk)513{514}515static inline bool bio_zone_write_plugging(struct bio *bio)516{517 return false;518}519static inline bool bio_is_zone_append(struct bio *bio)520{521 return false;522}523static inline void blk_zone_write_plug_bio_merged(struct bio *bio)524{525}526static inline void blk_zone_write_plug_init_request(struct request *rq)527{528}529static inline void blk_zone_update_request_bio(struct request *rq,530 struct bio *bio)531{532}533static inline void blk_zone_bio_endio(struct bio *bio)534{535}536static inline void blk_zone_finish_request(struct request *rq)537{538}539static inline int blkdev_report_zones_ioctl(struct block_device *bdev,540 unsigned int cmd, unsigned long arg)541{542 return -ENOTTY;543}544static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,545 blk_mode_t mode, unsigned int cmd, unsigned long arg)546{547 return -ENOTTY;548}549#endif /* CONFIG_BLK_DEV_ZONED */550 551struct block_device *bdev_alloc(struct gendisk *disk, u8 partno);552void bdev_add(struct block_device *bdev, dev_t dev);553void bdev_unhash(struct block_device *bdev);554void bdev_drop(struct block_device *bdev);555 556int blk_alloc_ext_minor(void);557void blk_free_ext_minor(unsigned int minor);558#define ADDPART_FLAG_NONE 0559#define ADDPART_FLAG_RAID 1560#define ADDPART_FLAG_WHOLEDISK 2561int bdev_add_partition(struct gendisk *disk, int partno, sector_t start,562 sector_t length);563int bdev_del_partition(struct gendisk *disk, int partno);564int bdev_resize_partition(struct gendisk *disk, int partno, sector_t start,565 sector_t length);566void drop_partition(struct block_device *part);567 568void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors);569 570struct gendisk *__alloc_disk_node(struct request_queue *q, int node_id,571 struct lock_class_key *lkclass);572 573int bio_add_hw_page(struct request_queue *q, struct bio *bio,574 struct page *page, unsigned int len, unsigned int offset,575 unsigned int max_sectors, bool *same_page);576 577int bio_add_hw_folio(struct request_queue *q, struct bio *bio,578 struct folio *folio, size_t len, size_t offset,579 unsigned int max_sectors, bool *same_page);580 581/*582 * Clean up a page appropriately, where the page may be pinned, may have a583 * ref taken on it or neither.584 */585static inline void bio_release_page(struct bio *bio, struct page *page)586{587 if (bio_flagged(bio, BIO_PAGE_PINNED))588 unpin_user_page(page);589}590 591struct request_queue *blk_alloc_queue(struct queue_limits *lim, int node_id);592 593int disk_scan_partitions(struct gendisk *disk, blk_mode_t mode);594 595int disk_alloc_events(struct gendisk *disk);596void disk_add_events(struct gendisk *disk);597void disk_del_events(struct gendisk *disk);598void disk_release_events(struct gendisk *disk);599void disk_block_events(struct gendisk *disk);600void disk_unblock_events(struct gendisk *disk);601void disk_flush_events(struct gendisk *disk, unsigned int mask);602extern struct device_attribute dev_attr_events;603extern struct device_attribute dev_attr_events_async;604extern struct device_attribute dev_attr_events_poll_msecs;605 606extern struct attribute_group blk_trace_attr_group;607 608blk_mode_t file_to_blk_mode(struct file *file);609int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode,610 loff_t lstart, loff_t lend);611long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);612int blkdev_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags);613long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg);614 615extern const struct address_space_operations def_blk_aops;616 617int disk_register_independent_access_ranges(struct gendisk *disk);618void disk_unregister_independent_access_ranges(struct gendisk *disk);619 620#ifdef CONFIG_FAIL_MAKE_REQUEST621bool should_fail_request(struct block_device *part, unsigned int bytes);622#else /* CONFIG_FAIL_MAKE_REQUEST */623static inline bool should_fail_request(struct block_device *part,624 unsigned int bytes)625{626 return false;627}628#endif /* CONFIG_FAIL_MAKE_REQUEST */629 630/*631 * Optimized request reference counting. Ideally we'd make timeouts be more632 * clever, as that's the only reason we need references at all... But until633 * this happens, this is faster than using refcount_t. Also see:634 *635 * abc54d634334 ("io_uring: switch to atomic_t for io_kiocb reference count")636 */637#define req_ref_zero_or_close_to_overflow(req) \638 ((unsigned int) atomic_read(&(req->ref)) + 127u <= 127u)639 640static inline bool req_ref_inc_not_zero(struct request *req)641{642 return atomic_inc_not_zero(&req->ref);643}644 645static inline bool req_ref_put_and_test(struct request *req)646{647 WARN_ON_ONCE(req_ref_zero_or_close_to_overflow(req));648 return atomic_dec_and_test(&req->ref);649}650 651static inline void req_ref_set(struct request *req, int value)652{653 atomic_set(&req->ref, value);654}655 656static inline int req_ref_read(struct request *req)657{658 return atomic_read(&req->ref);659}660 661static inline u64 blk_time_get_ns(void)662{663 struct blk_plug *plug = current->plug;664 665 if (!plug || !in_task())666 return ktime_get_ns();667 668 /*669 * 0 could very well be a valid time, but rather than flag "this is670 * a valid timestamp" separately, just accept that we'll do an extra671 * ktime_get_ns() if we just happen to get 0 as the current time.672 */673 if (!plug->cur_ktime) {674 plug->cur_ktime = ktime_get_ns();675 current->flags |= PF_BLOCK_TS;676 }677 return plug->cur_ktime;678}679 680static inline ktime_t blk_time_get(void)681{682 return ns_to_ktime(blk_time_get_ns());683}684 685/*686 * From most significant bit:687 * 1 bit: reserved for other usage, see below688 * 12 bits: original size of bio689 * 51 bits: issue time of bio690 */691#define BIO_ISSUE_RES_BITS 1692#define BIO_ISSUE_SIZE_BITS 12693#define BIO_ISSUE_RES_SHIFT (64 - BIO_ISSUE_RES_BITS)694#define BIO_ISSUE_SIZE_SHIFT (BIO_ISSUE_RES_SHIFT - BIO_ISSUE_SIZE_BITS)695#define BIO_ISSUE_TIME_MASK ((1ULL << BIO_ISSUE_SIZE_SHIFT) - 1)696#define BIO_ISSUE_SIZE_MASK \697 (((1ULL << BIO_ISSUE_SIZE_BITS) - 1) << BIO_ISSUE_SIZE_SHIFT)698#define BIO_ISSUE_RES_MASK (~((1ULL << BIO_ISSUE_RES_SHIFT) - 1))699 700/* Reserved bit for blk-throtl */701#define BIO_ISSUE_THROTL_SKIP_LATENCY (1ULL << 63)702 703static inline u64 __bio_issue_time(u64 time)704{705 return time & BIO_ISSUE_TIME_MASK;706}707 708static inline u64 bio_issue_time(struct bio_issue *issue)709{710 return __bio_issue_time(issue->value);711}712 713static inline sector_t bio_issue_size(struct bio_issue *issue)714{715 return ((issue->value & BIO_ISSUE_SIZE_MASK) >> BIO_ISSUE_SIZE_SHIFT);716}717 718static inline void bio_issue_init(struct bio_issue *issue,719 sector_t size)720{721 size &= (1ULL << BIO_ISSUE_SIZE_BITS) - 1;722 issue->value = ((issue->value & BIO_ISSUE_RES_MASK) |723 (blk_time_get_ns() & BIO_ISSUE_TIME_MASK) |724 ((u64)size << BIO_ISSUE_SIZE_SHIFT));725}726 727void bdev_release(struct file *bdev_file);728int bdev_open(struct block_device *bdev, blk_mode_t mode, void *holder,729 const struct blk_holder_ops *hops, struct file *bdev_file);730int bdev_permission(dev_t dev, blk_mode_t mode, void *holder);731 732void blk_integrity_generate(struct bio *bio);733void blk_integrity_verify(struct bio *bio);734void blk_integrity_prepare(struct request *rq);735void blk_integrity_complete(struct request *rq, unsigned int nr_bytes);736 737#endif /* BLK_INTERNAL_H */738