/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_BLKDEV_H#define _LINUX_BLKDEV_H #include <linux/sched.h>#include <linux/sched/clock.h> #ifdef CONFIG_BLOCK #include <linux/major.h>#include <linux/genhd.h>#include <linux/list.h>#include <linux/llist.h>#include <linux/timer.h>#include <linux/workqueue.h>#include <linux/pagemap.h>#include <linux/backing-dev-defs.h>#include <linux/wait.h>#include <linux/mempool.h>#include <linux/pfn.h>#include <linux/bio.h>#include <linux/stringify.h>#include <linux/gfp.h>#include <linux/bsg.h>#include <linux/smp.h>#include <linux/rcupdate.h>#include <linux/percpu-refcount.h>#include <linux/scatterlist.h>#include <linux/blkzoned.h> struct module;struct scsi_ioctl_command; struct request_queue;struct elevator_queue;struct blk_trace;struct request;struct sg_io_hdr;struct bsg_job;struct blkcg_gq;struct blk_flush_queue;struct pr_ops;struct rq_qos;struct blk_queue_stats;struct blk_stat_callback;struct blk_keyslot_manager; #define BLKDEV_MIN_RQ 4#define BLKDEV_MAX_RQ 128 /* Default maximum */ /* Must be consistent with blk_mq_poll_stats_bkt() */#define BLK_MQ_POLL_STATS_BKTS 16 /* Doing classic polling */#define BLK_MQ_POLL_CLASSIC -1 /* * Maximum number of blkcg policies allowed to be registered concurrently. * Defined here to simplify include dependency. */#define BLKCG_MAX_POLS 5 typedef void (rq_end_io_fn)(struct request *, blk_status_t); /* * request flags */typedef __u32 __bitwise req_flags_t; /* elevator knows about this request */#define RQF_SORTED ((__force req_flags_t)(1 << 0))/* drive already may have started this one */#define RQF_STARTED ((__force req_flags_t)(1 << 1))/* may not be passed by ioscheduler */#define RQF_SOFTBARRIER ((__force req_flags_t)(1 << 3))/* request for flush sequence */#define RQF_FLUSH_SEQ ((__force req_flags_t)(1 << 4))/* merge of different types, fail separately */#define RQF_MIXED_MERGE ((__force req_flags_t)(1 << 5))/* track inflight for MQ */#define RQF_MQ_INFLIGHT ((__force req_flags_t)(1 << 6))/* don't call prep for this one */#define RQF_DONTPREP ((__force req_flags_t)(1 << 7))/* set for "ide_preempt" requests and also for requests for which the SCSI "quiesce" state must be ignored. */#define RQF_PREEMPT ((__force req_flags_t)(1 << 8))/* vaguely specified driver internal error. Ignored by the block layer */#define RQF_FAILED ((__force req_flags_t)(1 << 10))/* don't warn about errors */#define RQF_QUIET ((__force req_flags_t)(1 << 11))/* elevator private data attached */#define RQF_ELVPRIV ((__force req_flags_t)(1 << 12))/* account into disk and partition IO statistics */#define RQF_IO_STAT ((__force req_flags_t)(1 << 13))/* request came from our alloc pool */#define RQF_ALLOCED ((__force req_flags_t)(1 << 14))/* runtime pm request */#define RQF_PM ((__force req_flags_t)(1 << 15))/* on IO scheduler merge hash */#define RQF_HASHED ((__force req_flags_t)(1 << 16))/* track IO completion time */#define RQF_STATS ((__force req_flags_t)(1 << 17))/* Look at ->special_vec for the actual data payload instead of the bio chain. */#define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18))/* The per-zone write lock is held for this request */#define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19))/* already slept for hybrid poll */#define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20))/* ->timeout has been called, don't expire again */#define RQF_TIMED_OUT ((__force req_flags_t)(1 << 21)) /* flags that prevent us from merging requests: */#define RQF_NOMERGE_FLAGS \ (RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD) /* * Request state for blk-mq. */enum mq_rq_state { MQ_RQ_IDLE = 0, MQ_RQ_IN_FLIGHT = 1, MQ_RQ_COMPLETE = 2,}; /* * Try to put the fields that are referenced together in the same cacheline. * * If you modify this structure, make sure to update blk_rq_init() and * especially blk_mq_rq_ctx_init() to take care of the added fields. */struct request { struct request_queue *q; struct blk_mq_ctx *mq_ctx; struct blk_mq_hw_ctx *mq_hctx; unsigned int cmd_flags; /* op and common flags */ req_flags_t rq_flags; int tag; int internal_tag; /* the following two fields are internal, NEVER access directly */ unsigned int __data_len; /* total data len */ sector_t __sector; /* sector cursor */ struct bio *bio; struct bio *biotail; struct list_head queuelist; /* * The hash is used inside the scheduler, and killed once the * request reaches the dispatch list. The ipi_list is only used * to queue the request for softirq completion, which is long * after the request has been unhashed (and even removed from * the dispatch list). */ union { struct hlist_node hash; /* merge hash */ struct list_head ipi_list; }; /* * The rb_node is only used inside the io scheduler, requests * are pruned when moved to the dispatch queue. So let the * completion_data share space with the rb_node. */ union { struct rb_node rb_node; /* sort/lookup */ struct bio_vec special_vec; void *completion_data; int error_count; /* for legacy drivers, don't use */ }; /* * Three pointers are available for the IO schedulers, if they need * more they have to dynamically allocate it. Flush requests are * never put on the IO scheduler. So let the flush fields share * space with the elevator data. */ union { struct { struct io_cq *icq; void *priv[2]; } elv; struct { unsigned int seq; struct list_head list; rq_end_io_fn *saved_end_io; } flush; }; struct gendisk *rq_disk; struct hd_struct *part;#ifdef CONFIG_BLK_RQ_ALLOC_TIME /* Time that the first bio started allocating this request. */ u64 alloc_time_ns;#endif /* Time that this request was allocated for this IO. */ u64 start_time_ns; /* Time that I/O was submitted to the device. */ u64 io_start_time_ns; #ifdef CONFIG_BLK_WBT unsigned short wbt_flags;#endif /* * rq sectors used for blk stats. It has the same value * with blk_rq_sectors(rq), except that it never be zeroed * by completion. */ unsigned short stats_sectors; /* * Number of scatter-gather DMA addr+len pairs after * physical address coalescing is performed. */ unsigned short nr_phys_segments; #if defined(CONFIG_BLK_DEV_INTEGRITY) unsigned short nr_integrity_segments;#endif #ifdef CONFIG_BLK_INLINE_ENCRYPTION struct bio_crypt_ctx *crypt_ctx; struct blk_ksm_keyslot *crypt_keyslot;#endif unsigned short write_hint; unsigned short ioprio; enum mq_rq_state state; refcount_t ref; unsigned int timeout; unsigned long deadline; union { struct __call_single_data csd; u64 fifo_time; }; /* * completion callback. */ rq_end_io_fn *end_io; void *end_io_data;}; static inline bool blk_op_is_scsi(unsigned int op){ return op == REQ_OP_SCSI_IN || op == REQ_OP_SCSI_OUT;} static inline bool blk_op_is_private(unsigned int op){ return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT;} static inline bool blk_rq_is_scsi(struct request *rq){ return blk_op_is_scsi(req_op(rq));} static inline bool blk_rq_is_private(struct request *rq){ return blk_op_is_private(req_op(rq));} static inline bool blk_rq_is_passthrough(struct request *rq){ return blk_rq_is_scsi(rq) || blk_rq_is_private(rq);} static inline bool bio_is_passthrough(struct bio *bio){ unsigned op = bio_op(bio); return blk_op_is_scsi(op) || blk_op_is_private(op);} static inline unsigned short req_get_ioprio(struct request *req){ return req->ioprio;} #include <linux/elevator.h> struct blk_queue_ctx; typedef blk_qc_t (make_request_fn) (struct request_queue *q, struct bio *bio); struct bio_vec; enum blk_eh_timer_return { BLK_EH_DONE, /* drivers has completed the command */ BLK_EH_RESET_TIMER, /* reset timer and try again */}; enum blk_queue_state { Queue_down, Queue_up,}; #define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */#define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */ #define BLK_SCSI_MAX_CMDS (256)#define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8)) /* * Zoned block device models (zoned limit). */enum blk_zoned_model { BLK_ZONED_NONE, /* Regular block device */ BLK_ZONED_HA, /* Host-aware zoned block device */ BLK_ZONED_HM, /* Host-managed zoned block device */}; struct queue_limits { unsigned long bounce_pfn; unsigned long seg_boundary_mask; unsigned long virt_boundary_mask; unsigned int max_hw_sectors; unsigned int max_dev_sectors; unsigned int chunk_sectors; unsigned int max_sectors; unsigned int max_segment_size; unsigned int physical_block_size; unsigned int logical_block_size; unsigned int alignment_offset; unsigned int io_min; unsigned int io_opt; unsigned int max_discard_sectors; unsigned int max_hw_discard_sectors; unsigned int max_write_same_sectors; unsigned int max_write_zeroes_sectors; unsigned int max_zone_append_sectors; unsigned int discard_granularity; unsigned int discard_alignment; unsigned short max_segments; unsigned short max_integrity_segments; unsigned short max_discard_segments; unsigned char misaligned; unsigned char discard_misaligned; unsigned char raid_partial_stripes_expensive; enum blk_zoned_model zoned;}; typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx, void *data); #ifdef CONFIG_BLK_DEV_ZONED #define BLK_ALL_ZONES ((unsigned int)-1)int blkdev_report_zones(struct block_device *bdev, sector_t sector, unsigned int nr_zones, report_zones_cb cb, void *data);unsigned int blkdev_nr_zones(struct gendisk *disk);extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, sector_t sectors, sector_t nr_sectors, gfp_t gfp_mask);int blk_revalidate_disk_zones(struct gendisk *disk, void (*update_driver_data)(struct gendisk *disk)); extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg);extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg); #else /* CONFIG_BLK_DEV_ZONED */ static inline unsigned int blkdev_nr_zones(struct gendisk *disk){ return 0;} static inline int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg){ return -ENOTTY;} static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg){ return -ENOTTY;} #endif /* CONFIG_BLK_DEV_ZONED */ struct request_queue { struct request *last_merge; struct elevator_queue *elevator; struct blk_queue_stats *stats; struct rq_qos *rq_qos; make_request_fn *make_request_fn; const struct blk_mq_ops *mq_ops; /* sw queues */ struct blk_mq_ctx __percpu *queue_ctx; unsigned int queue_depth; /* hw dispatch queues */ struct blk_mq_hw_ctx **queue_hw_ctx; unsigned int nr_hw_queues; struct backing_dev_info *backing_dev_info; /* * The queue owner gets to use this for whatever they like. * ll_rw_blk doesn't touch it. */ void *queuedata; /* * various queue flags, see QUEUE_* below */ unsigned long queue_flags; /* * Number of contexts that have called blk_set_pm_only(). If this * counter is above zero then only RQF_PM and RQF_PREEMPT requests are * processed. */ atomic_t pm_only; /* * ida allocated id for this queue. Used to index queues from * ioctx. */ int id; /* * queue needs bounce pages for pages above this limit */ gfp_t bounce_gfp; spinlock_t queue_lock; /* * queue kobject */ struct kobject kobj; /* * mq queue kobject */ struct kobject *mq_kobj; #ifdef CONFIG_BLK_DEV_INTEGRITY struct blk_integrity integrity;#endif /* CONFIG_BLK_DEV_INTEGRITY */ #ifdef CONFIG_PM struct device *dev; int rpm_status; unsigned int nr_pending;#endif /* * queue settings */ unsigned long nr_requests; /* Max # of requests */ unsigned int dma_pad_mask; unsigned int dma_alignment; #ifdef CONFIG_BLK_INLINE_ENCRYPTION /* Inline crypto capabilities */ struct blk_keyslot_manager *ksm;#endif unsigned int rq_timeout; int poll_nsec; struct blk_stat_callback *poll_cb; struct blk_rq_stat poll_stat[BLK_MQ_POLL_STATS_BKTS]; struct timer_list timeout; struct work_struct timeout_work; struct list_head icq_list;#ifdef CONFIG_BLK_CGROUP DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS); struct blkcg_gq *root_blkg; struct list_head blkg_list;#endif struct queue_limits limits; unsigned int required_elevator_features;Lines 1–500 of 1923. 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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_BLKDEV_H #define _LINUX_BLKDEV_H #include <linux/sched.h> #include <linux/sched/clock.h> #ifdef CONFIG_BLOCK #include <linux/major.h> #include <linux/genhd.h> #include <linux/list.h> #include <linux/llist.h> #include <linux/timer.h> #include <linux/workqueue.h> #include <linux/pagemap.h> #include <linux/backing-dev-defs.h> #include <linux/wait.h> #include <linux/mempool.h> #include <linux/pfn.h> #include <linux/bio.h> #include <linux/stringify.h> #include <linux/gfp.h> #include <linux/bsg.h> #include <linux/smp.h> #include <linux/rcupdate.h> #include <linux/percpu-refcount.h> #include <linux/scatterlist.h> #include <linux/blkzoned.h> struct module; struct scsi_ioctl_command; struct request_queue; struct elevator_queue; struct blk_trace; struct request; struct sg_io_hdr; struct bsg_job; struct blkcg_gq; struct blk_flush_queue; struct pr_ops; struct rq_qos; struct blk_queue_stats; struct blk_stat_callback; struct blk_keyslot_manager; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 /* Default maximum */ /* Must be consistent with blk_mq_poll_stats_bkt() */ #define BLK_MQ_POLL_STATS_BKTS 16 /* Doing classic polling */ #define BLK_MQ_POLL_CLASSIC -1 /* * Maximum number of blkcg policies allowed to be registered concurrently. * Defined here to simplify include dependency. */ #define BLKCG_MAX_POLS 5 typedef void (rq_end_io_fn)(struct request *, blk_status_t); /* * request flags */ typedef __u32 __bitwise req_flags_t; /* elevator knows about this request */ #define RQF_SORTED ((__force req_flags_t)(1 << 0)) /* drive already may have started this one */ #define RQF_STARTED ((__force req_flags_t)(1 << 1)) /* may not be passed by ioscheduler */ #define RQF_SOFTBARRIER ((__force req_flags_t)(1 << 3)) /* request for flush sequence */ #define RQF_FLUSH_SEQ ((__force req_flags_t)(1 << 4)) /* merge of different types, fail separately */ #define RQF_MIXED_MERGE ((__force req_flags_t)(1 << 5)) /* track inflight for MQ */ #define RQF_MQ_INFLIGHT ((__force req_flags_t)(1 << 6)) /* don't call prep for this one */ #define RQF_DONTPREP ((__force req_flags_t)(1 << 7)) /* set for "ide_preempt" requests and also for requests for which the SCSI "quiesce" state must be ignored. */ #define RQF_PREEMPT ((__force req_flags_t)(1 << 8)) /* vaguely specified driver internal error. Ignored by the block layer */ #define RQF_FAILED ((__force req_flags_t)(1 << 10)) /* don't warn about errors */ #define RQF_QUIET ((__force req_flags_t)(1 << 11)) /* elevator private data attached */ #define RQF_ELVPRIV ((__force req_flags_t)(1 << 12)) /* account into disk and partition IO statistics */ #define RQF_IO_STAT ((__force req_flags_t)(1 << 13)) /* request came from our alloc pool */ #define RQF_ALLOCED ((__force req_flags_t)(1 << 14)) /* runtime pm request */ #define RQF_PM ((__force req_flags_t)(1 << 15)) /* on IO scheduler merge hash */ #define RQF_HASHED ((__force req_flags_t)(1 << 16)) /* track IO completion time */ #define RQF_STATS ((__force req_flags_t)(1 << 17)) /* Look at ->special_vec for the actual data payload instead of the bio chain. */ #define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18)) /* The per-zone write lock is held for this request */ #define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19)) /* already slept for hybrid poll */ #define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20)) /* ->timeout has been called, don't expire again */ #define RQF_TIMED_OUT ((__force req_flags_t)(1 << 21)) /* flags that prevent us from merging requests: */ #define RQF_NOMERGE_FLAGS \ (RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD) /* * Request state for blk-mq. */ enum mq_rq_state { MQ_RQ_IDLE = 0, MQ_RQ_IN_FLIGHT = 1, MQ_RQ_COMPLETE = 2, }; /* * Try to put the fields that are referenced together in the same cacheline. * * If you modify this structure, make sure to update blk_rq_init() and * especially blk_mq_rq_ctx_init() to take care of the added fields. */ struct request { struct request_queue *q; struct blk_mq_ctx *mq_ctx; struct blk_mq_hw_ctx *mq_hctx; unsigned int cmd_flags; /* op and common flags */ req_flags_t rq_flags; int tag; int internal_tag; /* the following two fields are internal, NEVER access directly */ unsigned int __data_len; /* total data len */ sector_t __sector; /* sector cursor */ struct bio *bio; struct bio *biotail; struct list_head queuelist; /* * The hash is used inside the scheduler, and killed once the * request reaches the dispatch list. The ipi_list is only used * to queue the request for softirq completion, which is long * after the request has been unhashed (and even removed from * the dispatch list). */ union { struct hlist_node hash; /* merge hash */ struct list_head ipi_list; }; /* * The rb_node is only used inside the io scheduler, requests * are pruned when moved to the dispatch queue. So let the * completion_data share space with the rb_node. */ union { struct rb_node rb_node; /* sort/lookup */ struct bio_vec special_vec; void *completion_data; int error_count; /* for legacy drivers, don't use */ }; /* * Three pointers are available for the IO schedulers, if they need * more they have to dynamically allocate it. Flush requests are * never put on the IO scheduler. So let the flush fields share * space with the elevator data. */ union { struct { struct io_cq *icq; void *priv[2]; } elv; struct { unsigned int seq; struct list_head list; rq_end_io_fn *saved_end_io; } flush; }; struct gendisk *rq_disk; struct hd_struct *part; #ifdef CONFIG_BLK_RQ_ALLOC_TIME /* Time that the first bio started allocating this request. */ u64 alloc_time_ns; #endif /* Time that this request was allocated for this IO. */ u64 start_time_ns; /* Time that I/O was submitted to the device. */ u64 io_start_time_ns; #ifdef CONFIG_BLK_WBT unsigned short wbt_flags; #endif /* * rq sectors used for blk stats. It has the same value * with blk_rq_sectors(rq), except that it never be zeroed * by completion. */ unsigned short stats_sectors; /* * Number of scatter-gather DMA addr+len pairs after * physical address coalescing is performed. */ unsigned short nr_phys_segments; #if defined(CONFIG_BLK_DEV_INTEGRITY) unsigned short nr_integrity_segments; #endif #ifdef CONFIG_BLK_INLINE_ENCRYPTION struct bio_crypt_ctx *crypt_ctx; struct blk_ksm_keyslot *crypt_keyslot; #endif unsigned short write_hint; unsigned short ioprio; enum mq_rq_state state; refcount_t ref; unsigned int timeout; unsigned long deadline; union { struct __call_single_data csd; u64 fifo_time; }; /* * completion callback. */ rq_end_io_fn *end_io; void *end_io_data; }; static inline bool blk_op_is_scsi(unsigned int op) { return op == REQ_OP_SCSI_IN || op == REQ_OP_SCSI_OUT; } static inline bool blk_op_is_private(unsigned int op) { return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT; } static inline bool blk_rq_is_scsi(struct request *rq) { return blk_op_is_scsi(req_op(rq)); } static inline bool blk_rq_is_private(struct request *rq) { return blk_op_is_private(req_op(rq)); } static inline bool blk_rq_is_passthrough(struct request *rq) { return blk_rq_is_scsi(rq) || blk_rq_is_private(rq); } static inline bool bio_is_passthrough(struct bio *bio) { unsigned op = bio_op(bio); return blk_op_is_scsi(op) || blk_op_is_private(op); } static inline unsigned short req_get_ioprio(struct request *req) { return req->ioprio; } #include <linux/elevator.h> struct blk_queue_ctx; typedef blk_qc_t (make_request_fn) (struct request_queue *q, struct bio *bio); struct bio_vec; enum blk_eh_timer_return { BLK_EH_DONE, /* drivers has completed the command */ BLK_EH_RESET_TIMER, /* reset timer and try again */ }; enum blk_queue_state { Queue_down, Queue_up, }; #define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */ #define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */ #define BLK_SCSI_MAX_CMDS (256) #define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8)) /* * Zoned block device models (zoned limit). */ enum blk_zoned_model { BLK_ZONED_NONE, /* Regular block device */ BLK_ZONED_HA, /* Host-aware zoned block device */ BLK_ZONED_HM, /* Host-managed zoned block device */ }; struct queue_limits { unsigned long bounce_pfn; unsigned long seg_boundary_mask; unsigned long virt_boundary_mask; unsigned int max_hw_sectors; unsigned int max_dev_sectors; unsigned int chunk_sectors; unsigned int max_sectors; unsigned int max_segment_size; unsigned int physical_block_size; unsigned int logical_block_size; unsigned int alignment_offset; unsigned int io_min; unsigned int io_opt; unsigned int max_discard_sectors; unsigned int max_hw_discard_sectors; unsigned int max_write_same_sectors; unsigned int max_write_zeroes_sectors; unsigned int max_zone_append_sectors; unsigned int discard_granularity; unsigned int discard_alignment; unsigned short max_segments; unsigned short max_integrity_segments; unsigned short max_discard_segments; unsigned char misaligned; unsigned char discard_misaligned; unsigned char raid_partial_stripes_expensive; enum blk_zoned_model zoned; }; typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx, void *data); #ifdef CONFIG_BLK_DEV_ZONED #define BLK_ALL_ZONES ((unsigned int)-1) int blkdev_report_zones(struct block_device *bdev, sector_t sector, unsigned int nr_zones, report_zones_cb cb, void *data); unsigned int blkdev_nr_zones(struct gendisk *disk); extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op, sector_t sectors, sector_t nr_sectors, gfp_t gfp_mask); int blk_revalidate_disk_zones(struct gendisk *disk, void (*update_driver_data)(struct gendisk *disk)); extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg); extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg); #else /* CONFIG_BLK_DEV_ZONED */ static inline unsigned int blkdev_nr_zones(struct gendisk *disk) { return 0; } static inline int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { return -ENOTTY; } static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { return -ENOTTY; } #endif /* CONFIG_BLK_DEV_ZONED */ struct request_queue { struct request *last_merge; struct elevator_queue *elevator; struct blk_queue_stats *stats; struct rq_qos *rq_qos; make_request_fn *make_request_fn; const struct blk_mq_ops *mq_ops; /* sw queues */ struct blk_mq_ctx __percpu *queue_ctx; unsigned int queue_depth; /* hw dispatch queues */ struct blk_mq_hw_ctx **queue_hw_ctx; unsigned int nr_hw_queues; struct backing_dev_info *backing_dev_info; /* * The queue owner gets to use this for whatever they like. * ll_rw_blk doesn't touch it. */ void *queuedata; /* * various queue flags, see QUEUE_* below */ unsigned long queue_flags; /* * Number of contexts that have called blk_set_pm_only(). If this * counter is above zero then only RQF_PM and RQF_PREEMPT requests are * processed. */ atomic_t pm_only; /* * ida allocated id for this queue. Used to index queues from * ioctx. */ int id; /* * queue needs bounce pages for pages above this limit */ gfp_t bounce_gfp; spinlock_t queue_lock; /* * queue kobject */ struct kobject kobj; /* * mq queue kobject */ struct kobject *mq_kobj; #ifdef CONFIG_BLK_DEV_INTEGRITY struct blk_integrity integrity; #endif /* CONFIG_BLK_DEV_INTEGRITY */ #ifdef CONFIG_PM struct device *dev; int rpm_status; unsigned int nr_pending; #endif /* * queue settings */ unsigned long nr_requests; /* Max # of requests */ unsigned int dma_pad_mask; unsigned int dma_alignment; #ifdef CONFIG_BLK_INLINE_ENCRYPTION /* Inline crypto capabilities */ struct blk_keyslot_manager *ksm; #endif unsigned int rq_timeout; int poll_nsec; struct blk_stat_callback *poll_cb; struct blk_rq_stat poll_stat[BLK_MQ_POLL_STATS_BKTS]; struct timer_list timeout; struct work_struct timeout_work; struct list_head icq_list; #ifdef CONFIG_BLK_CGROUP DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS); struct blkcg_gq *root_blkg; struct list_head blkg_list; #endif struct queue_limits limits; unsigned int required_elevator_features;