From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- block/blk.h | 451 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 451 insertions(+) create mode 100644 block/blk.h (limited to 'block/blk.h') diff --git a/block/blk.h b/block/blk.h new file mode 100644 index 000000000..997941cd9 --- /dev/null +++ b/block/blk.h @@ -0,0 +1,451 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef BLK_INTERNAL_H +#define BLK_INTERNAL_H + +#include +#include +#include +#include +#include +#include "blk-crypto-internal.h" +#include "blk-mq.h" +#include "blk-mq-sched.h" + +/* Max future timer expiry for timeouts */ +#define BLK_MAX_TIMEOUT (5 * HZ) + +extern struct dentry *blk_debugfs_root; + +struct blk_flush_queue { + unsigned int flush_pending_idx:1; + unsigned int flush_running_idx:1; + blk_status_t rq_status; + unsigned long flush_pending_since; + struct list_head flush_queue[2]; + struct list_head flush_data_in_flight; + struct request *flush_rq; + + struct lock_class_key key; + spinlock_t mq_flush_lock; +}; + +extern struct kmem_cache *blk_requestq_cachep; +extern struct kobj_type blk_queue_ktype; +extern struct ida blk_queue_ida; + +static inline struct blk_flush_queue * +blk_get_flush_queue(struct request_queue *q, struct blk_mq_ctx *ctx) +{ + return blk_mq_map_queue(q, REQ_OP_FLUSH, ctx)->fq; +} + +static inline void __blk_get_queue(struct request_queue *q) +{ + kobject_get(&q->kobj); +} + +bool is_flush_rq(struct request *req); + +struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, + gfp_t flags); +void blk_free_flush_queue(struct blk_flush_queue *q); + +void blk_freeze_queue(struct request_queue *q); + +static inline bool biovec_phys_mergeable(struct request_queue *q, + struct bio_vec *vec1, struct bio_vec *vec2) +{ + unsigned long mask = queue_segment_boundary(q); + phys_addr_t addr1 = page_to_phys(vec1->bv_page) + vec1->bv_offset; + phys_addr_t addr2 = page_to_phys(vec2->bv_page) + vec2->bv_offset; + + if (addr1 + vec1->bv_len != addr2) + return false; + if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2->bv_page)) + return false; + if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask)) + return false; + return true; +} + +static inline bool __bvec_gap_to_prev(struct request_queue *q, + struct bio_vec *bprv, unsigned int offset) +{ + return (offset & queue_virt_boundary(q)) || + ((bprv->bv_offset + bprv->bv_len) & queue_virt_boundary(q)); +} + +/* + * Check if adding a bio_vec after bprv with offset would create a gap in + * the SG list. Most drivers don't care about this, but some do. + */ +static inline bool bvec_gap_to_prev(struct request_queue *q, + struct bio_vec *bprv, unsigned int offset) +{ + if (!queue_virt_boundary(q)) + return false; + return __bvec_gap_to_prev(q, bprv, offset); +} + +static inline void blk_rq_bio_prep(struct request *rq, struct bio *bio, + unsigned int nr_segs) +{ + rq->nr_phys_segments = nr_segs; + rq->__data_len = bio->bi_iter.bi_size; + rq->bio = rq->biotail = bio; + rq->ioprio = bio_prio(bio); + + if (bio->bi_disk) + rq->rq_disk = bio->bi_disk; +} + +#ifdef CONFIG_BLK_DEV_INTEGRITY +void blk_flush_integrity(void); +bool __bio_integrity_endio(struct bio *); +void bio_integrity_free(struct bio *bio); +static inline bool bio_integrity_endio(struct bio *bio) +{ + if (bio_integrity(bio)) + return __bio_integrity_endio(bio); + return true; +} + +bool blk_integrity_merge_rq(struct request_queue *, struct request *, + struct request *); +bool blk_integrity_merge_bio(struct request_queue *, struct request *, + struct bio *); + +static inline bool integrity_req_gap_back_merge(struct request *req, + struct bio *next) +{ + struct bio_integrity_payload *bip = bio_integrity(req->bio); + struct bio_integrity_payload *bip_next = bio_integrity(next); + + return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1], + bip_next->bip_vec[0].bv_offset); +} + +static inline bool integrity_req_gap_front_merge(struct request *req, + struct bio *bio) +{ + struct bio_integrity_payload *bip = bio_integrity(bio); + struct bio_integrity_payload *bip_next = bio_integrity(req->bio); + + return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1], + bip_next->bip_vec[0].bv_offset); +} + +void blk_integrity_add(struct gendisk *); +void blk_integrity_del(struct gendisk *); +#else /* CONFIG_BLK_DEV_INTEGRITY */ +static inline bool blk_integrity_merge_rq(struct request_queue *rq, + struct request *r1, struct request *r2) +{ + return true; +} +static inline bool blk_integrity_merge_bio(struct request_queue *rq, + struct request *r, struct bio *b) +{ + return true; +} +static inline bool integrity_req_gap_back_merge(struct request *req, + struct bio *next) +{ + return false; +} +static inline bool integrity_req_gap_front_merge(struct request *req, + struct bio *bio) +{ + return false; +} + +static inline void blk_flush_integrity(void) +{ +} +static inline bool bio_integrity_endio(struct bio *bio) +{ + return true; +} +static inline void bio_integrity_free(struct bio *bio) +{ +} +static inline void blk_integrity_add(struct gendisk *disk) +{ +} +static inline void blk_integrity_del(struct gendisk *disk) +{ +} +#endif /* CONFIG_BLK_DEV_INTEGRITY */ + +unsigned long blk_rq_timeout(unsigned long timeout); +void blk_add_timer(struct request *req); + +bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, + unsigned int nr_segs, struct request **same_queue_rq); +bool blk_bio_list_merge(struct request_queue *q, struct list_head *list, + struct bio *bio, unsigned int nr_segs); + +void blk_account_io_start(struct request *req); +void blk_account_io_done(struct request *req, u64 now); + +/* + * Plug flush limits + */ +#define BLK_MAX_REQUEST_COUNT 32 +#define BLK_PLUG_FLUSH_SIZE (128 * 1024) + +/* + * Internal elevator interface + */ +#define ELV_ON_HASH(rq) ((rq)->rq_flags & RQF_HASHED) + +void blk_insert_flush(struct request *rq); + +void elevator_init_mq(struct request_queue *q); +int elevator_switch_mq(struct request_queue *q, + struct elevator_type *new_e); +void __elevator_exit(struct request_queue *, struct elevator_queue *); +int elv_register_queue(struct request_queue *q, bool uevent); +void elv_unregister_queue(struct request_queue *q); + +static inline void elevator_exit(struct request_queue *q, + struct elevator_queue *e) +{ + lockdep_assert_held(&q->sysfs_lock); + + blk_mq_sched_free_requests(q); + __elevator_exit(q, e); +} + +struct hd_struct *__disk_get_part(struct gendisk *disk, int partno); + +ssize_t part_size_show(struct device *dev, struct device_attribute *attr, + char *buf); +ssize_t part_stat_show(struct device *dev, struct device_attribute *attr, + char *buf); +ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr, + char *buf); +ssize_t part_fail_show(struct device *dev, struct device_attribute *attr, + char *buf); +ssize_t part_fail_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count); +ssize_t part_timeout_show(struct device *, struct device_attribute *, char *); +ssize_t part_timeout_store(struct device *, struct device_attribute *, + const char *, size_t); + +void __blk_queue_split(struct bio **bio, unsigned int *nr_segs); +int ll_back_merge_fn(struct request *req, struct bio *bio, + unsigned int nr_segs); +int blk_attempt_req_merge(struct request_queue *q, struct request *rq, + struct request *next); +unsigned int blk_recalc_rq_segments(struct request *rq); +void blk_rq_set_mixed_merge(struct request *rq); +bool blk_rq_merge_ok(struct request *rq, struct bio *bio); +enum elv_merge blk_try_merge(struct request *rq, struct bio *bio); + +int blk_dev_init(void); + +/* + * Contribute to IO statistics IFF: + * + * a) it's attached to a gendisk, and + * b) the queue had IO stats enabled when this request was started + */ +static inline bool blk_do_io_stat(struct request *rq) +{ + return rq->rq_disk && (rq->rq_flags & RQF_IO_STAT); +} + +static inline void req_set_nomerge(struct request_queue *q, struct request *req) +{ + req->cmd_flags |= REQ_NOMERGE; + if (req == q->last_merge) + q->last_merge = NULL; +} + +/* + * The max size one bio can handle is UINT_MAX becasue bvec_iter.bi_size + * is defined as 'unsigned int', meantime it has to aligned to with logical + * block size which is the minimum accepted unit by hardware. + */ +static inline unsigned int bio_allowed_max_sectors(struct request_queue *q) +{ + return round_down(UINT_MAX, queue_logical_block_size(q)) >> 9; +} + +/* + * The max bio size which is aligned to q->limits.discard_granularity. This + * is a hint to split large discard bio in generic block layer, then if device + * driver needs to split the discard bio into smaller ones, their bi_size can + * be very probably and easily aligned to discard_granularity of the device's + * queue. + */ +static inline unsigned int bio_aligned_discard_max_sectors( + struct request_queue *q) +{ + return round_down(UINT_MAX, q->limits.discard_granularity) >> + SECTOR_SHIFT; +} + +/* + * Internal io_context interface + */ +void get_io_context(struct io_context *ioc); +struct io_cq *ioc_lookup_icq(struct io_context *ioc, struct request_queue *q); +struct io_cq *ioc_create_icq(struct io_context *ioc, struct request_queue *q, + gfp_t gfp_mask); +void ioc_clear_queue(struct request_queue *q); + +int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node); + +/* + * Internal throttling interface + */ +#ifdef CONFIG_BLK_DEV_THROTTLING +extern int blk_throtl_init(struct request_queue *q); +extern void blk_throtl_exit(struct request_queue *q); +extern void blk_throtl_register_queue(struct request_queue *q); +extern void blk_throtl_charge_bio_split(struct bio *bio); +bool blk_throtl_bio(struct bio *bio); +#else /* CONFIG_BLK_DEV_THROTTLING */ +static inline int blk_throtl_init(struct request_queue *q) { return 0; } +static inline void blk_throtl_exit(struct request_queue *q) { } +static inline void blk_throtl_register_queue(struct request_queue *q) { } +static inline void blk_throtl_charge_bio_split(struct bio *bio) { } +static inline bool blk_throtl_bio(struct bio *bio) { return false; } +#endif /* CONFIG_BLK_DEV_THROTTLING */ +#ifdef CONFIG_BLK_DEV_THROTTLING_LOW +extern ssize_t blk_throtl_sample_time_show(struct request_queue *q, char *page); +extern ssize_t blk_throtl_sample_time_store(struct request_queue *q, + const char *page, size_t count); +extern void blk_throtl_bio_endio(struct bio *bio); +extern void blk_throtl_stat_add(struct request *rq, u64 time); +#else +static inline void blk_throtl_bio_endio(struct bio *bio) { } +static inline void blk_throtl_stat_add(struct request *rq, u64 time) { } +#endif + +#ifdef CONFIG_BOUNCE +extern int init_emergency_isa_pool(void); +extern void blk_queue_bounce(struct request_queue *q, struct bio **bio); +#else +static inline int init_emergency_isa_pool(void) +{ + return 0; +} +static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio) +{ +} +#endif /* CONFIG_BOUNCE */ + +#ifdef CONFIG_BLK_CGROUP_IOLATENCY +extern int blk_iolatency_init(struct request_queue *q); +#else +static inline int blk_iolatency_init(struct request_queue *q) { return 0; } +#endif + +struct bio *blk_next_bio(struct bio *bio, unsigned int nr_pages, gfp_t gfp); + +#ifdef CONFIG_BLK_DEV_ZONED +void blk_queue_free_zone_bitmaps(struct request_queue *q); +#else +static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {} +#endif + +struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector); + +int blk_alloc_devt(struct hd_struct *part, dev_t *devt); +void blk_free_devt(dev_t devt); +void blk_invalidate_devt(dev_t devt); +char *disk_name(struct gendisk *hd, int partno, char *buf); +#define ADDPART_FLAG_NONE 0 +#define ADDPART_FLAG_RAID 1 +#define ADDPART_FLAG_WHOLEDISK 2 +void delete_partition(struct hd_struct *part); +int bdev_add_partition(struct block_device *bdev, int partno, + sector_t start, sector_t length); +int bdev_del_partition(struct block_device *bdev, int partno); +int bdev_resize_partition(struct block_device *bdev, int partno, + sector_t start, sector_t length); +int disk_expand_part_tbl(struct gendisk *disk, int target); +int hd_ref_init(struct hd_struct *part); + +/* no need to get/put refcount of part0 */ +static inline int hd_struct_try_get(struct hd_struct *part) +{ + if (part->partno) + return percpu_ref_tryget_live(&part->ref); + return 1; +} + +static inline void hd_struct_put(struct hd_struct *part) +{ + if (part->partno) + percpu_ref_put(&part->ref); +} + +static inline void hd_free_part(struct hd_struct *part) +{ + free_percpu(part->dkstats); + kfree(part->info); + percpu_ref_exit(&part->ref); +} + +/* + * Any access of part->nr_sects which is not protected by partition + * bd_mutex or gendisk bdev bd_mutex, should be done using this + * accessor function. + * + * Code written along the lines of i_size_read() and i_size_write(). + * CONFIG_PREEMPTION case optimizes the case of UP kernel with preemption + * on. + */ +static inline sector_t part_nr_sects_read(struct hd_struct *part) +{ +#if BITS_PER_LONG==32 && defined(CONFIG_SMP) + sector_t nr_sects; + unsigned seq; + do { + seq = read_seqcount_begin(&part->nr_sects_seq); + nr_sects = part->nr_sects; + } while (read_seqcount_retry(&part->nr_sects_seq, seq)); + return nr_sects; +#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) + sector_t nr_sects; + + preempt_disable(); + nr_sects = part->nr_sects; + preempt_enable(); + return nr_sects; +#else + return part->nr_sects; +#endif +} + +/* + * Should be called with mutex lock held (typically bd_mutex) of partition + * to provide mutual exlusion among writers otherwise seqcount might be + * left in wrong state leaving the readers spinning infinitely. + */ +static inline void part_nr_sects_write(struct hd_struct *part, sector_t size) +{ +#if BITS_PER_LONG==32 && defined(CONFIG_SMP) + preempt_disable(); + write_seqcount_begin(&part->nr_sects_seq); + part->nr_sects = size; + write_seqcount_end(&part->nr_sects_seq); + preempt_enable(); +#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION) + preempt_disable(); + part->nr_sects = size; + preempt_enable(); +#else + part->nr_sects = size; +#endif +} + +int bio_add_hw_page(struct request_queue *q, struct bio *bio, + struct page *page, unsigned int len, unsigned int offset, + unsigned int max_sectors, bool *same_page); + +#endif /* BLK_INTERNAL_H */ -- cgit v1.2.3