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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>
- #include <linux/major.h>
- #include <linux/genhd.h>
- #include <linux/list.h>
- #include <linux/llist.h>
- #include <linux/minmax.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>
- #include <linux/pm.h>
- #include <linux/android_kabi.h>
- #include <linux/android_vendor.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
- static inline int blk_validate_block_size(unsigned int bsize)
- {
- if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
- return -EINVAL;
- return 0;
- }
- 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))
- /* 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;
- ANDROID_KABI_RESERVE(1);
- };
- 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;
- 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).
- *
- * Note: This needs to be ordered from the least to the most severe
- * restrictions for the inheritance in blk_stack_limits() to work.
- */
- enum blk_zoned_model {
- BLK_ZONED_NONE = 0, /* 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;
- ANDROID_KABI_RESERVE(1);
- };
- typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx,
- void *data);
- void blk_queue_set_zoned(struct gendisk *disk, enum blk_zoned_model model);
- #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 percpu_ref q_usage_counter;
- struct blk_queue_stats *stats;
- struct rq_qos *rq_qos;
- 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 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;
- enum rpm_status 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;
- atomic_t nr_active_requests_shared_sbitmap;
- 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;
- #ifdef CONFIG_BLK_DEV_ZONED
- /*
- * Zoned block device information for request dispatch control.
- * nr_zones is the total number of zones of the device. This is always
- * 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones
- * bits which indicates if a zone is conventional (bit set) or
- * sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones
- * bits which indicates if a zone is write locked, that is, if a write
- * request targeting the zone was dispatched. All three fields are
- * initialized by the low level device driver (e.g. scsi/sd.c).
- * Stacking drivers (device mappers) may or may not initialize
- * these fields.
- *
- * Reads of this information must be protected with blk_queue_enter() /
- * blk_queue_exit(). Modifying this information is only allowed while
- * no requests are being processed. See also blk_mq_freeze_queue() and
- * blk_mq_unfreeze_queue().
- */
- unsigned int nr_zones;
- unsigned long *conv_zones_bitmap;
- unsigned long *seq_zones_wlock;
- unsigned int max_open_zones;
- unsigned int max_active_zones;
- #endif /* CONFIG_BLK_DEV_ZONED */
- /*
- * sg stuff
- */
- unsigned int sg_timeout;
- unsigned int sg_reserved_size;
- int node;
- struct mutex debugfs_mutex;
- #ifdef CONFIG_BLK_DEV_IO_TRACE
- struct blk_trace __rcu *blk_trace;
- #endif
- /*
- * for flush operations
- */
- struct blk_flush_queue *fq;
- struct list_head requeue_list;
- spinlock_t requeue_lock;
- struct delayed_work requeue_work;
- struct mutex sysfs_lock;
- struct mutex sysfs_dir_lock;
- /*
- * for reusing dead hctx instance in case of updating
- * nr_hw_queues
- */
- struct list_head unused_hctx_list;
- spinlock_t unused_hctx_lock;
- int mq_freeze_depth;
- #if defined(CONFIG_BLK_DEV_BSG)
- struct bsg_class_device bsg_dev;
- #endif
- #ifdef CONFIG_BLK_DEV_THROTTLING
- /* Throttle data */
- struct throtl_data *td;
- #endif
- struct rcu_head rcu_head;
- wait_queue_head_t mq_freeze_wq;
- /*
- * Protect concurrent access to q_usage_counter by
- * percpu_ref_kill() and percpu_ref_reinit().
- */
- struct mutex mq_freeze_lock;
- struct blk_mq_tag_set *tag_set;
- struct list_head tag_set_list;
- struct bio_set bio_split;
- struct dentry *debugfs_dir;
- #ifdef CONFIG_BLK_DEBUG_FS
- struct dentry *sched_debugfs_dir;
- struct dentry *rqos_debugfs_dir;
- #endif
- bool mq_sysfs_init_done;
- size_t cmd_size;
- #define BLK_MAX_WRITE_HINTS 5
- u64 write_hints[BLK_MAX_WRITE_HINTS];
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- ANDROID_OEM_DATA(1);
- };
- /* Keep blk_queue_flag_name[] in sync with the definitions below */
- #define QUEUE_FLAG_STOPPED 0 /* queue is stopped */
- #define QUEUE_FLAG_DYING 1 /* queue being torn down */
- #define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */
- #define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */
- #define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */
- #define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */
- #define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */
- #define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */
- #define QUEUE_FLAG_DISCARD 8 /* supports DISCARD */
- #define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */
- #define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */
- #define QUEUE_FLAG_SECERASE 11 /* supports secure erase */
- #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */
- #define QUEUE_FLAG_DEAD 13 /* queue tear-down finished */
- #define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */
- #define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */
- #define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */
- #define QUEUE_FLAG_WC 17 /* Write back caching */
- #define QUEUE_FLAG_FUA 18 /* device supports FUA writes */
- #define QUEUE_FLAG_DAX 19 /* device supports DAX */
- #define QUEUE_FLAG_STATS 20 /* track IO start and completion times */
- #define QUEUE_FLAG_POLL_STATS 21 /* collecting stats for hybrid polling */
- #define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */
- #define QUEUE_FLAG_SCSI_PASSTHROUGH 23 /* queue supports SCSI commands */
- #define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */
- #define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */
- #define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */
- #define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */
- #define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */
- #define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */
- #define QUEUE_FLAG_MQ_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
- (1 << QUEUE_FLAG_SAME_COMP) | \
- (1 << QUEUE_FLAG_NOWAIT))
- void blk_queue_flag_set(unsigned int flag, struct request_queue *q);
- void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);
- bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
- #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags)
- #define blk_queue_dying(q) test_bit(QUEUE_FLAG_DYING, &(q)->queue_flags)
- #define blk_queue_dead(q) test_bit(QUEUE_FLAG_DEAD, &(q)->queue_flags)
- #define blk_queue_init_done(q) test_bit(QUEUE_FLAG_INIT_DONE, &(q)->queue_flags)
- #define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags)
- #define blk_queue_noxmerges(q) \
- test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags)
- #define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags)
- #define blk_queue_stable_writes(q) \
- test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags)
- #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags)
- #define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags)
- #define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags)
- #define blk_queue_zone_resetall(q) \
- test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags)
- #define blk_queue_secure_erase(q) \
- (test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags))
- #define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags)
- #define blk_queue_scsi_passthrough(q) \
- test_bit(QUEUE_FLAG_SCSI_PASSTHROUGH, &(q)->queue_flags)
- #define blk_queue_pci_p2pdma(q) \
- test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags)
- #ifdef CONFIG_BLK_RQ_ALLOC_TIME
- #define blk_queue_rq_alloc_time(q) \
- test_bit(QUEUE_FLAG_RQ_ALLOC_TIME, &(q)->queue_flags)
- #else
- #define blk_queue_rq_alloc_time(q) false
- #endif
- #define blk_noretry_request(rq) \
- ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
- REQ_FAILFAST_DRIVER))
- #define blk_queue_quiesced(q) test_bit(QUEUE_FLAG_QUIESCED, &(q)->queue_flags)
- #define blk_queue_pm_only(q) atomic_read(&(q)->pm_only)
- #define blk_queue_fua(q) test_bit(QUEUE_FLAG_FUA, &(q)->queue_flags)
- #define blk_queue_registered(q) test_bit(QUEUE_FLAG_REGISTERED, &(q)->queue_flags)
- #define blk_queue_nowait(q) test_bit(QUEUE_FLAG_NOWAIT, &(q)->queue_flags)
- extern void blk_set_pm_only(struct request_queue *q);
- extern void blk_clear_pm_only(struct request_queue *q);
- static inline bool blk_account_rq(struct request *rq)
- {
- return (rq->rq_flags & RQF_STARTED) && !blk_rq_is_passthrough(rq);
- }
- #define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist)
- #define rq_data_dir(rq) (op_is_write(req_op(rq)) ? WRITE : READ)
- #define rq_dma_dir(rq) \
- (op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
- #define dma_map_bvec(dev, bv, dir, attrs) \
- dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \
- (dir), (attrs))
- static inline bool queue_is_mq(struct request_queue *q)
- {
- return q->mq_ops;
- }
- static inline enum blk_zoned_model
- blk_queue_zoned_model(struct request_queue *q)
- {
- if (IS_ENABLED(CONFIG_BLK_DEV_ZONED))
- return q->limits.zoned;
- return BLK_ZONED_NONE;
- }
- static inline bool blk_queue_is_zoned(struct request_queue *q)
- {
- switch (blk_queue_zoned_model(q)) {
- case BLK_ZONED_HA:
- case BLK_ZONED_HM:
- return true;
- default:
- return false;
- }
- }
- static inline sector_t blk_queue_zone_sectors(struct request_queue *q)
- {
- return blk_queue_is_zoned(q) ? q->limits.chunk_sectors : 0;
- }
- #ifdef CONFIG_BLK_DEV_ZONED
- static inline unsigned int blk_queue_nr_zones(struct request_queue *q)
- {
- return blk_queue_is_zoned(q) ? q->nr_zones : 0;
- }
- static inline unsigned int blk_queue_zone_no(struct request_queue *q,
- sector_t sector)
- {
- if (!blk_queue_is_zoned(q))
- return 0;
- return sector >> ilog2(q->limits.chunk_sectors);
- }
- static inline bool blk_queue_zone_is_seq(struct request_queue *q,
- sector_t sector)
- {
- if (!blk_queue_is_zoned(q))
- return false;
- if (!q->conv_zones_bitmap)
- return true;
- return !test_bit(blk_queue_zone_no(q, sector), q->conv_zones_bitmap);
- }
- static inline void blk_queue_max_open_zones(struct request_queue *q,
- unsigned int max_open_zones)
- {
- q->max_open_zones = max_open_zones;
- }
- static inline unsigned int queue_max_open_zones(const struct request_queue *q)
- {
- return q->max_open_zones;
- }
- static inline void blk_queue_max_active_zones(struct request_queue *q,
- unsigned int max_active_zones)
- {
- q->max_active_zones = max_active_zones;
- }
- static inline unsigned int queue_max_active_zones(const struct request_queue *q)
- {
- return q->max_active_zones;
- }
- #else /* CONFIG_BLK_DEV_ZONED */
- static inline unsigned int blk_queue_nr_zones(struct request_queue *q)
- {
- return 0;
- }
- static inline bool blk_queue_zone_is_seq(struct request_queue *q,
- sector_t sector)
- {
- return false;
- }
- static inline unsigned int blk_queue_zone_no(struct request_queue *q,
- sector_t sector)
- {
- return 0;
- }
- static inline unsigned int queue_max_open_zones(const struct request_queue *q)
- {
- return 0;
- }
- static inline unsigned int queue_max_active_zones(const struct request_queue *q)
- {
- return 0;
- }
- #endif /* CONFIG_BLK_DEV_ZONED */
- static inline bool rq_is_sync(struct request *rq)
- {
- return op_is_sync(rq->cmd_flags);
- }
- static inline bool rq_mergeable(struct request *rq)
- {
- if (blk_rq_is_passthrough(rq))
- return false;
- if (req_op(rq) == REQ_OP_FLUSH)
- return false;
- if (req_op(rq) == REQ_OP_WRITE_ZEROES)
- return false;
- if (req_op(rq) == REQ_OP_ZONE_APPEND)
- return false;
- if (rq->cmd_flags & REQ_NOMERGE_FLAGS)
- return false;
- if (rq->rq_flags & RQF_NOMERGE_FLAGS)
- return false;
- return true;
- }
- static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b)
- {
- if (bio_page(a) == bio_page(b) &&
- bio_offset(a) == bio_offset(b))
- return true;
- return false;
- }
- static inline unsigned int blk_queue_depth(struct request_queue *q)
- {
- if (q->queue_depth)
- return q->queue_depth;
- return q->nr_requests;
- }
- extern unsigned long blk_max_low_pfn, blk_max_pfn;
- /*
- * standard bounce addresses:
- *
- * BLK_BOUNCE_HIGH : bounce all highmem pages
- * BLK_BOUNCE_ANY : don't bounce anything
- * BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary
- */
- #if BITS_PER_LONG == 32
- #define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT)
- #else
- #define BLK_BOUNCE_HIGH -1ULL
- #endif
- #define BLK_BOUNCE_ANY (-1ULL)
- #define BLK_BOUNCE_ISA (DMA_BIT_MASK(24))
- /*
- * default timeout for SG_IO if none specified
- */
- #define BLK_DEFAULT_SG_TIMEOUT (60 * HZ)
- #define BLK_MIN_SG_TIMEOUT (7 * HZ)
- struct rq_map_data {
- struct page **pages;
- int page_order;
- int nr_entries;
- unsigned long offset;
- int null_mapped;
- int from_user;
- };
- struct req_iterator {
- struct bvec_iter iter;
- struct bio *bio;
- };
- /* This should not be used directly - use rq_for_each_segment */
- #define for_each_bio(_bio) \
- for (; _bio; _bio = _bio->bi_next)
- #define __rq_for_each_bio(_bio, rq) \
- if ((rq->bio)) \
- for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next)
- #define rq_for_each_segment(bvl, _rq, _iter) \
- __rq_for_each_bio(_iter.bio, _rq) \
- bio_for_each_segment(bvl, _iter.bio, _iter.iter)
- #define rq_for_each_bvec(bvl, _rq, _iter) \
- __rq_for_each_bio(_iter.bio, _rq) \
- bio_for_each_bvec(bvl, _iter.bio, _iter.iter)
- #define rq_iter_last(bvec, _iter) \
- (_iter.bio->bi_next == NULL && \
- bio_iter_last(bvec, _iter.iter))
- #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
- # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
- #endif
- #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
- extern void rq_flush_dcache_pages(struct request *rq);
- #else
- static inline void rq_flush_dcache_pages(struct request *rq)
- {
- }
- #endif
- extern int blk_register_queue(struct gendisk *disk);
- extern void blk_unregister_queue(struct gendisk *disk);
- blk_qc_t submit_bio_noacct(struct bio *bio);
- extern void blk_rq_init(struct request_queue *q, struct request *rq);
- extern void blk_put_request(struct request *);
- extern struct request *blk_get_request(struct request_queue *, unsigned int op,
- blk_mq_req_flags_t flags);
- extern int blk_lld_busy(struct request_queue *q);
- extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
- struct bio_set *bs, gfp_t gfp_mask,
- int (*bio_ctr)(struct bio *, struct bio *, void *),
- void *data);
- extern void blk_rq_unprep_clone(struct request *rq);
- extern blk_status_t blk_insert_cloned_request(struct request_queue *q,
- struct request *rq);
- extern int blk_rq_append_bio(struct request *rq, struct bio **bio);
- extern void blk_queue_split(struct bio **);
- extern int scsi_verify_blk_ioctl(struct block_device *, unsigned int);
- extern int scsi_cmd_blk_ioctl(struct block_device *, fmode_t,
- unsigned int, void __user *);
- extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
- unsigned int, void __user *);
- extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
- struct scsi_ioctl_command __user *);
- extern int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp);
- extern int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp);
- extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags);
- extern void blk_queue_exit(struct request_queue *q);
- extern void blk_sync_queue(struct request_queue *q);
- extern int blk_rq_map_user(struct request_queue *, struct request *,
- struct rq_map_data *, void __user *, unsigned long,
- gfp_t);
- extern int blk_rq_unmap_user(struct bio *);
- extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t);
- extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
- struct rq_map_data *, const struct iov_iter *,
- gfp_t);
- extern void blk_execute_rq(struct request_queue *, struct gendisk *,
- struct request *, int);
- extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
- struct request *, int, rq_end_io_fn *);
- /* Helper to convert REQ_OP_XXX to its string format XXX */
- extern const char *blk_op_str(unsigned int op);
- int blk_status_to_errno(blk_status_t status);
- blk_status_t errno_to_blk_status(int errno);
- int blk_poll(struct request_queue *q, blk_qc_t cookie, bool spin);
- static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
- {
- return bdev->bd_disk->queue; /* this is never NULL */
- }
- /*
- * The basic unit of block I/O is a sector. It is used in a number of contexts
- * in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9
- * bytes. Variables of type sector_t represent an offset or size that is a
- * multiple of 512 bytes. Hence these two constants.
- */
- #ifndef SECTOR_SHIFT
- #define SECTOR_SHIFT 9
- #endif
- #ifndef SECTOR_SIZE
- #define SECTOR_SIZE (1 << SECTOR_SHIFT)
- #endif
- /*
- * blk_rq_pos() : the current sector
- * blk_rq_bytes() : bytes left in the entire request
- * blk_rq_cur_bytes() : bytes left in the current segment
- * blk_rq_err_bytes() : bytes left till the next error boundary
- * blk_rq_sectors() : sectors left in the entire request
- * blk_rq_cur_sectors() : sectors left in the current segment
- * blk_rq_stats_sectors() : sectors of the entire request used for stats
- */
- static inline sector_t blk_rq_pos(const struct request *rq)
- {
- return rq->__sector;
- }
- static inline unsigned int blk_rq_bytes(const struct request *rq)
- {
- return rq->__data_len;
- }
- static inline int blk_rq_cur_bytes(const struct request *rq)
- {
- return rq->bio ? bio_cur_bytes(rq->bio) : 0;
- }
- extern unsigned int blk_rq_err_bytes(const struct request *rq);
- static inline unsigned int blk_rq_sectors(const struct request *rq)
- {
- return blk_rq_bytes(rq) >> SECTOR_SHIFT;
- }
- static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
- {
- return blk_rq_cur_bytes(rq) >> SECTOR_SHIFT;
- }
- static inline unsigned int blk_rq_stats_sectors(const struct request *rq)
- {
- return rq->stats_sectors;
- }
- #ifdef CONFIG_BLK_DEV_ZONED
- /* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */
- const char *blk_zone_cond_str(enum blk_zone_cond zone_cond);
- static inline unsigned int blk_rq_zone_no(struct request *rq)
- {
- return blk_queue_zone_no(rq->q, blk_rq_pos(rq));
- }
- static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
- {
- return blk_queue_zone_is_seq(rq->q, blk_rq_pos(rq));
- }
- #endif /* CONFIG_BLK_DEV_ZONED */
- /*
- * Some commands like WRITE SAME have a payload or data transfer size which
- * is different from the size of the request. Any driver that supports such
- * commands using the RQF_SPECIAL_PAYLOAD flag needs to use this helper to
- * calculate the data transfer size.
- */
- static inline unsigned int blk_rq_payload_bytes(struct request *rq)
- {
- if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
- return rq->special_vec.bv_len;
- return blk_rq_bytes(rq);
- }
- /*
- * Return the first full biovec in the request. The caller needs to check that
- * there are any bvecs before calling this helper.
- */
- static inline struct bio_vec req_bvec(struct request *rq)
- {
- if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
- return rq->special_vec;
- return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter);
- }
- static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
- int op)
- {
- if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
- return min(q->limits.max_discard_sectors,
- UINT_MAX >> SECTOR_SHIFT);
- if (unlikely(op == REQ_OP_WRITE_SAME))
- return q->limits.max_write_same_sectors;
- if (unlikely(op == REQ_OP_WRITE_ZEROES))
- return q->limits.max_write_zeroes_sectors;
- return q->limits.max_sectors;
- }
- /*
- * Return maximum size of a request at given offset. Only valid for
- * file system requests.
- */
- static inline unsigned int blk_max_size_offset(struct request_queue *q,
- sector_t offset,
- unsigned int chunk_sectors)
- {
- if (!chunk_sectors) {
- if (q->limits.chunk_sectors)
- chunk_sectors = q->limits.chunk_sectors;
- else
- return q->limits.max_sectors;
- }
- if (likely(is_power_of_2(chunk_sectors)))
- chunk_sectors -= offset & (chunk_sectors - 1);
- else
- chunk_sectors -= sector_div(offset, chunk_sectors);
- return min(q->limits.max_sectors, chunk_sectors);
- }
- static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
- sector_t offset)
- {
- struct request_queue *q = rq->q;
- if (blk_rq_is_passthrough(rq))
- return q->limits.max_hw_sectors;
- if (!q->limits.chunk_sectors ||
- req_op(rq) == REQ_OP_DISCARD ||
- req_op(rq) == REQ_OP_SECURE_ERASE)
- return blk_queue_get_max_sectors(q, req_op(rq));
- return min(blk_max_size_offset(q, offset, 0),
- blk_queue_get_max_sectors(q, req_op(rq)));
- }
- static inline unsigned int blk_rq_count_bios(struct request *rq)
- {
- unsigned int nr_bios = 0;
- struct bio *bio;
- __rq_for_each_bio(bio, rq)
- nr_bios++;
- return nr_bios;
- }
- void blk_steal_bios(struct bio_list *list, struct request *rq);
- /*
- * Request completion related functions.
- *
- * blk_update_request() completes given number of bytes and updates
- * the request without completing it.
- */
- extern bool blk_update_request(struct request *rq, blk_status_t error,
- unsigned int nr_bytes);
- extern void blk_abort_request(struct request *);
- /*
- * Access functions for manipulating queue properties
- */
- extern void blk_cleanup_queue(struct request_queue *);
- extern void blk_queue_bounce_limit(struct request_queue *, u64);
- extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int);
- extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int);
- extern void blk_queue_max_segments(struct request_queue *, unsigned short);
- extern void blk_queue_max_discard_segments(struct request_queue *,
- unsigned short);
- extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
- extern void blk_queue_max_discard_sectors(struct request_queue *q,
- unsigned int max_discard_sectors);
- extern void blk_queue_max_write_same_sectors(struct request_queue *q,
- unsigned int max_write_same_sectors);
- extern void blk_queue_max_write_zeroes_sectors(struct request_queue *q,
- unsigned int max_write_same_sectors);
- extern void blk_queue_logical_block_size(struct request_queue *, unsigned int);
- extern void blk_queue_max_zone_append_sectors(struct request_queue *q,
- unsigned int max_zone_append_sectors);
- extern void blk_queue_physical_block_size(struct request_queue *, unsigned int);
- extern void blk_queue_alignment_offset(struct request_queue *q,
- unsigned int alignment);
- void blk_queue_update_readahead(struct request_queue *q);
- extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min);
- extern void blk_queue_io_min(struct request_queue *q, unsigned int min);
- extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt);
- extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt);
- extern void blk_set_queue_depth(struct request_queue *q, unsigned int depth);
- extern void blk_set_default_limits(struct queue_limits *lim);
- extern void blk_set_stacking_limits(struct queue_limits *lim);
- extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
- sector_t offset);
- extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev,
- sector_t offset);
- extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int);
- extern void blk_queue_segment_boundary(struct request_queue *, unsigned long);
- extern void blk_queue_virt_boundary(struct request_queue *, unsigned long);
- extern void blk_queue_dma_alignment(struct request_queue *, int);
- extern void blk_queue_update_dma_alignment(struct request_queue *, int);
- extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
- extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
- extern void blk_queue_required_elevator_features(struct request_queue *q,
- unsigned int features);
- extern bool blk_queue_can_use_dma_map_merging(struct request_queue *q,
- struct device *dev);
- /*
- * Number of physical segments as sent to the device.
- *
- * Normally this is the number of discontiguous data segments sent by the
- * submitter. But for data-less command like discard we might have no
- * actual data segments submitted, but the driver might have to add it's
- * own special payload. In that case we still return 1 here so that this
- * special payload will be mapped.
- */
- static inline unsigned short blk_rq_nr_phys_segments(struct request *rq)
- {
- if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
- return 1;
- return rq->nr_phys_segments;
- }
- /*
- * Number of discard segments (or ranges) the driver needs to fill in.
- * Each discard bio merged into a request is counted as one segment.
- */
- static inline unsigned short blk_rq_nr_discard_segments(struct request *rq)
- {
- return max_t(unsigned short, rq->nr_phys_segments, 1);
- }
- int __blk_rq_map_sg(struct request_queue *q, struct request *rq,
- struct scatterlist *sglist, struct scatterlist **last_sg);
- static inline int blk_rq_map_sg(struct request_queue *q, struct request *rq,
- struct scatterlist *sglist)
- {
- struct scatterlist *last_sg = NULL;
- return __blk_rq_map_sg(q, rq, sglist, &last_sg);
- }
- extern void blk_dump_rq_flags(struct request *, char *);
- bool __must_check blk_get_queue(struct request_queue *);
- struct request_queue *blk_alloc_queue(int node_id);
- extern void blk_put_queue(struct request_queue *);
- extern void blk_set_queue_dying(struct request_queue *);
- #ifdef CONFIG_BLOCK
- /*
- * blk_plug permits building a queue of related requests by holding the I/O
- * fragments for a short period. This allows merging of sequential requests
- * into single larger request. As the requests are moved from a per-task list to
- * the device's request_queue in a batch, this results in improved scalability
- * as the lock contention for request_queue lock is reduced.
- *
- * It is ok not to disable preemption when adding the request to the plug list
- * or when attempting a merge, because blk_schedule_flush_list() will only flush
- * the plug list when the task sleeps by itself. For details, please see
- * schedule() where blk_schedule_flush_plug() is called.
- */
- struct blk_plug {
- struct list_head mq_list; /* blk-mq requests */
- struct list_head cb_list; /* md requires an unplug callback */
- unsigned short rq_count;
- bool multiple_queues;
- bool nowait;
- };
- struct blk_plug_cb;
- typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool);
- struct blk_plug_cb {
- struct list_head list;
- blk_plug_cb_fn callback;
- void *data;
- };
- extern struct blk_plug_cb *blk_check_plugged(blk_plug_cb_fn unplug,
- void *data, int size);
- extern void blk_start_plug(struct blk_plug *);
- extern void blk_finish_plug(struct blk_plug *);
- extern void blk_flush_plug_list(struct blk_plug *, bool);
- static inline void blk_flush_plug(struct task_struct *tsk)
- {
- struct blk_plug *plug = tsk->plug;
- if (plug)
- blk_flush_plug_list(plug, false);
- }
- static inline void blk_schedule_flush_plug(struct task_struct *tsk)
- {
- struct blk_plug *plug = tsk->plug;
- if (plug)
- blk_flush_plug_list(plug, true);
- }
- static inline bool blk_needs_flush_plug(struct task_struct *tsk)
- {
- struct blk_plug *plug = tsk->plug;
- return plug &&
- (!list_empty(&plug->mq_list) ||
- !list_empty(&plug->cb_list));
- }
- int blkdev_issue_flush(struct block_device *, gfp_t);
- long nr_blockdev_pages(void);
- #else /* CONFIG_BLOCK */
- struct blk_plug {
- };
- static inline void blk_start_plug(struct blk_plug *plug)
- {
- }
- static inline void blk_finish_plug(struct blk_plug *plug)
- {
- }
- static inline void blk_flush_plug(struct task_struct *task)
- {
- }
- static inline void blk_schedule_flush_plug(struct task_struct *task)
- {
- }
- static inline bool blk_needs_flush_plug(struct task_struct *tsk)
- {
- return false;
- }
- static inline int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask)
- {
- return 0;
- }
- static inline long nr_blockdev_pages(void)
- {
- return 0;
- }
- #endif /* CONFIG_BLOCK */
- extern void blk_io_schedule(void);
- extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
- sector_t nr_sects, gfp_t gfp_mask, struct page *page);
- #define BLKDEV_DISCARD_SECURE (1 << 0) /* issue a secure erase */
- extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
- sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
- extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
- sector_t nr_sects, gfp_t gfp_mask, int flags,
- struct bio **biop);
- #define BLKDEV_ZERO_NOUNMAP (1 << 0) /* do not free blocks */
- #define BLKDEV_ZERO_NOFALLBACK (1 << 1) /* don't write explicit zeroes */
- extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
- sector_t nr_sects, gfp_t gfp_mask, struct bio **biop,
- unsigned flags);
- extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
- sector_t nr_sects, gfp_t gfp_mask, unsigned flags);
- static inline int sb_issue_discard(struct super_block *sb, sector_t block,
- sector_t nr_blocks, gfp_t gfp_mask, unsigned long flags)
- {
- return blkdev_issue_discard(sb->s_bdev,
- block << (sb->s_blocksize_bits -
- SECTOR_SHIFT),
- nr_blocks << (sb->s_blocksize_bits -
- SECTOR_SHIFT),
- gfp_mask, flags);
- }
- static inline int sb_issue_zeroout(struct super_block *sb, sector_t block,
- sector_t nr_blocks, gfp_t gfp_mask)
- {
- return blkdev_issue_zeroout(sb->s_bdev,
- block << (sb->s_blocksize_bits -
- SECTOR_SHIFT),
- nr_blocks << (sb->s_blocksize_bits -
- SECTOR_SHIFT),
- gfp_mask, 0);
- }
- extern int blk_verify_command(unsigned char *cmd, fmode_t mode);
- static inline bool bdev_is_partition(struct block_device *bdev)
- {
- return bdev->bd_partno;
- }
- enum blk_default_limits {
- BLK_MAX_SEGMENTS = 128,
- BLK_SAFE_MAX_SECTORS = 255,
- BLK_DEF_MAX_SECTORS = 2560,
- BLK_MAX_SEGMENT_SIZE = 65536,
- BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL,
- };
- static inline unsigned long queue_segment_boundary(const struct request_queue *q)
- {
- return q->limits.seg_boundary_mask;
- }
- static inline unsigned long queue_virt_boundary(const struct request_queue *q)
- {
- return q->limits.virt_boundary_mask;
- }
- static inline unsigned int queue_max_sectors(const struct request_queue *q)
- {
- return q->limits.max_sectors;
- }
- static inline unsigned int queue_max_hw_sectors(const struct request_queue *q)
- {
- return q->limits.max_hw_sectors;
- }
- static inline unsigned short queue_max_segments(const struct request_queue *q)
- {
- return q->limits.max_segments;
- }
- static inline unsigned short queue_max_discard_segments(const struct request_queue *q)
- {
- return q->limits.max_discard_segments;
- }
- static inline unsigned int queue_max_segment_size(const struct request_queue *q)
- {
- return q->limits.max_segment_size;
- }
- static inline unsigned int queue_max_zone_append_sectors(const struct request_queue *q)
- {
- const struct queue_limits *l = &q->limits;
- return min(l->max_zone_append_sectors, l->max_sectors);
- }
- static inline unsigned queue_logical_block_size(const struct request_queue *q)
- {
- int retval = 512;
- if (q && q->limits.logical_block_size)
- retval = q->limits.logical_block_size;
- return retval;
- }
- static inline unsigned int bdev_logical_block_size(struct block_device *bdev)
- {
- return queue_logical_block_size(bdev_get_queue(bdev));
- }
- static inline unsigned int queue_physical_block_size(const struct request_queue *q)
- {
- return q->limits.physical_block_size;
- }
- static inline unsigned int bdev_physical_block_size(struct block_device *bdev)
- {
- return queue_physical_block_size(bdev_get_queue(bdev));
- }
- static inline unsigned int queue_io_min(const struct request_queue *q)
- {
- return q->limits.io_min;
- }
- static inline int bdev_io_min(struct block_device *bdev)
- {
- return queue_io_min(bdev_get_queue(bdev));
- }
- static inline unsigned int queue_io_opt(const struct request_queue *q)
- {
- return q->limits.io_opt;
- }
- static inline int bdev_io_opt(struct block_device *bdev)
- {
- return queue_io_opt(bdev_get_queue(bdev));
- }
- static inline int queue_alignment_offset(const struct request_queue *q)
- {
- if (q->limits.misaligned)
- return -1;
- return q->limits.alignment_offset;
- }
- static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t sector)
- {
- unsigned int granularity = max(lim->physical_block_size, lim->io_min);
- unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT)
- << SECTOR_SHIFT;
- return (granularity + lim->alignment_offset - alignment) % granularity;
- }
- static inline int bdev_alignment_offset(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q->limits.misaligned)
- return -1;
- if (bdev_is_partition(bdev))
- return queue_limit_alignment_offset(&q->limits,
- bdev->bd_part->start_sect);
- return q->limits.alignment_offset;
- }
- static inline int queue_discard_alignment(const struct request_queue *q)
- {
- if (q->limits.discard_misaligned)
- return -1;
- return q->limits.discard_alignment;
- }
- static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector)
- {
- unsigned int alignment, granularity, offset;
- if (!lim->max_discard_sectors)
- return 0;
- /* Why are these in bytes, not sectors? */
- alignment = lim->discard_alignment >> SECTOR_SHIFT;
- granularity = lim->discard_granularity >> SECTOR_SHIFT;
- if (!granularity)
- return 0;
- /* Offset of the partition start in 'granularity' sectors */
- offset = sector_div(sector, granularity);
- /* And why do we do this modulus *again* in blkdev_issue_discard()? */
- offset = (granularity + alignment - offset) % granularity;
- /* Turn it back into bytes, gaah */
- return offset << SECTOR_SHIFT;
- }
- /*
- * Two cases of handling DISCARD merge:
- * If max_discard_segments > 1, the driver takes every bio
- * as a range and send them to controller together. The ranges
- * needn't to be contiguous.
- * Otherwise, the bios/requests will be handled as same as
- * others which should be contiguous.
- */
- static inline bool blk_discard_mergable(struct request *req)
- {
- if (req_op(req) == REQ_OP_DISCARD &&
- queue_max_discard_segments(req->q) > 1)
- return true;
- return false;
- }
- static inline int bdev_discard_alignment(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (bdev_is_partition(bdev))
- return queue_limit_discard_alignment(&q->limits,
- bdev->bd_part->start_sect);
- return q->limits.discard_alignment;
- }
- static inline unsigned int bdev_write_same(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return q->limits.max_write_same_sectors;
- return 0;
- }
- static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return q->limits.max_write_zeroes_sectors;
- return 0;
- }
- static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return blk_queue_zoned_model(q);
- return BLK_ZONED_NONE;
- }
- static inline bool bdev_is_zoned(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return blk_queue_is_zoned(q);
- return false;
- }
- static inline sector_t bdev_zone_sectors(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return blk_queue_zone_sectors(q);
- return 0;
- }
- static inline unsigned int bdev_max_open_zones(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return queue_max_open_zones(q);
- return 0;
- }
- static inline unsigned int bdev_max_active_zones(struct block_device *bdev)
- {
- struct request_queue *q = bdev_get_queue(bdev);
- if (q)
- return queue_max_active_zones(q);
- return 0;
- }
- static inline int queue_dma_alignment(const struct request_queue *q)
- {
- return q ? q->dma_alignment : 511;
- }
- static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
- unsigned int len)
- {
- unsigned int alignment = queue_dma_alignment(q) | q->dma_pad_mask;
- return !(addr & alignment) && !(len & alignment);
- }
- /* assumes size > 256 */
- static inline unsigned int blksize_bits(unsigned int size)
- {
- unsigned int bits = 8;
- do {
- bits++;
- size >>= 1;
- } while (size > 256);
- return bits;
- }
- static inline unsigned int block_size(struct block_device *bdev)
- {
- return 1 << bdev->bd_inode->i_blkbits;
- }
- int kblockd_schedule_work(struct work_struct *work);
- int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay);
- #define MODULE_ALIAS_BLOCKDEV(major,minor) \
- MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))
- #define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
- MODULE_ALIAS("block-major-" __stringify(major) "-*")
- #if defined(CONFIG_BLK_DEV_INTEGRITY)
- enum blk_integrity_flags {
- BLK_INTEGRITY_VERIFY = 1 << 0,
- BLK_INTEGRITY_GENERATE = 1 << 1,
- BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,
- BLK_INTEGRITY_IP_CHECKSUM = 1 << 3,
- };
- struct blk_integrity_iter {
- void *prot_buf;
- void *data_buf;
- sector_t seed;
- unsigned int data_size;
- unsigned short interval;
- const char *disk_name;
- };
- typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *);
- typedef void (integrity_prepare_fn) (struct request *);
- typedef void (integrity_complete_fn) (struct request *, unsigned int);
- struct blk_integrity_profile {
- integrity_processing_fn *generate_fn;
- integrity_processing_fn *verify_fn;
- integrity_prepare_fn *prepare_fn;
- integrity_complete_fn *complete_fn;
- const char *name;
- };
- extern void blk_integrity_register(struct gendisk *, struct blk_integrity *);
- extern void blk_integrity_unregister(struct gendisk *);
- extern int blk_integrity_compare(struct gendisk *, struct gendisk *);
- extern int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
- struct scatterlist *);
- extern int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
- static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
- {
- struct blk_integrity *bi = &disk->queue->integrity;
- if (!bi->profile)
- return NULL;
- return bi;
- }
- static inline
- struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
- {
- return blk_get_integrity(bdev->bd_disk);
- }
- static inline bool
- blk_integrity_queue_supports_integrity(struct request_queue *q)
- {
- return q->integrity.profile;
- }
- static inline bool blk_integrity_rq(struct request *rq)
- {
- return rq->cmd_flags & REQ_INTEGRITY;
- }
- static inline void blk_queue_max_integrity_segments(struct request_queue *q,
- unsigned int segs)
- {
- q->limits.max_integrity_segments = segs;
- }
- static inline unsigned short
- queue_max_integrity_segments(const struct request_queue *q)
- {
- return q->limits.max_integrity_segments;
- }
- /**
- * bio_integrity_intervals - Return number of integrity intervals for a bio
- * @bi: blk_integrity profile for device
- * @sectors: Size of the bio in 512-byte sectors
- *
- * Description: The block layer calculates everything in 512 byte
- * sectors but integrity metadata is done in terms of the data integrity
- * interval size of the storage device. Convert the block layer sectors
- * to the appropriate number of integrity intervals.
- */
- static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
- unsigned int sectors)
- {
- return sectors >> (bi->interval_exp - 9);
- }
- static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
- unsigned int sectors)
- {
- return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
- }
- /*
- * Return the first bvec that contains integrity data. Only drivers that are
- * limited to a single integrity segment should use this helper.
- */
- static inline struct bio_vec *rq_integrity_vec(struct request *rq)
- {
- if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1))
- return NULL;
- return rq->bio->bi_integrity->bip_vec;
- }
- #else /* CONFIG_BLK_DEV_INTEGRITY */
- struct bio;
- struct block_device;
- struct gendisk;
- struct blk_integrity;
- static inline int blk_integrity_rq(struct request *rq)
- {
- return 0;
- }
- static inline int blk_rq_count_integrity_sg(struct request_queue *q,
- struct bio *b)
- {
- return 0;
- }
- static inline int blk_rq_map_integrity_sg(struct request_queue *q,
- struct bio *b,
- struct scatterlist *s)
- {
- return 0;
- }
- static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
- {
- return NULL;
- }
- static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
- {
- return NULL;
- }
- static inline bool
- blk_integrity_queue_supports_integrity(struct request_queue *q)
- {
- return false;
- }
- static inline int blk_integrity_compare(struct gendisk *a, struct gendisk *b)
- {
- return 0;
- }
- static inline void blk_integrity_register(struct gendisk *d,
- struct blk_integrity *b)
- {
- }
- static inline void blk_integrity_unregister(struct gendisk *d)
- {
- }
- static inline void blk_queue_max_integrity_segments(struct request_queue *q,
- unsigned int segs)
- {
- }
- static inline unsigned short queue_max_integrity_segments(const struct request_queue *q)
- {
- return 0;
- }
- static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
- unsigned int sectors)
- {
- return 0;
- }
- static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
- unsigned int sectors)
- {
- return 0;
- }
- static inline struct bio_vec *rq_integrity_vec(struct request *rq)
- {
- return NULL;
- }
- #endif /* CONFIG_BLK_DEV_INTEGRITY */
- #ifdef CONFIG_BLK_INLINE_ENCRYPTION
- bool blk_ksm_register(struct blk_keyslot_manager *ksm, struct request_queue *q);
- void blk_ksm_unregister(struct request_queue *q);
- #else /* CONFIG_BLK_INLINE_ENCRYPTION */
- static inline bool blk_ksm_register(struct blk_keyslot_manager *ksm,
- struct request_queue *q)
- {
- return true;
- }
- static inline void blk_ksm_unregister(struct request_queue *q) { }
- #endif /* CONFIG_BLK_INLINE_ENCRYPTION */
- struct block_device_operations {
- blk_qc_t (*submit_bio) (struct bio *bio);
- int (*open) (struct block_device *, fmode_t);
- void (*release) (struct gendisk *, fmode_t);
- int (*rw_page)(struct block_device *, sector_t, struct page *, unsigned int);
- int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
- int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
- unsigned int (*check_events) (struct gendisk *disk,
- unsigned int clearing);
- void (*unlock_native_capacity) (struct gendisk *);
- int (*revalidate_disk) (struct gendisk *);
- int (*getgeo)(struct block_device *, struct hd_geometry *);
- /* this callback is with swap_lock and sometimes page table lock held */
- void (*swap_slot_free_notify) (struct block_device *, unsigned long);
- int (*report_zones)(struct gendisk *, sector_t sector,
- unsigned int nr_zones, report_zones_cb cb, void *data);
- char *(*devnode)(struct gendisk *disk, umode_t *mode);
- struct module *owner;
- const struct pr_ops *pr_ops;
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_OEM_DATA(1);
- };
- #ifdef CONFIG_COMPAT
- extern int blkdev_compat_ptr_ioctl(struct block_device *, fmode_t,
- unsigned int, unsigned long);
- #else
- #define blkdev_compat_ptr_ioctl NULL
- #endif
- extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
- unsigned long);
- extern int bdev_read_page(struct block_device *, sector_t, struct page *);
- extern int bdev_write_page(struct block_device *, sector_t, struct page *,
- struct writeback_control *);
- #ifdef CONFIG_BLK_DEV_ZONED
- bool blk_req_needs_zone_write_lock(struct request *rq);
- bool blk_req_zone_write_trylock(struct request *rq);
- void __blk_req_zone_write_lock(struct request *rq);
- void __blk_req_zone_write_unlock(struct request *rq);
- static inline void blk_req_zone_write_lock(struct request *rq)
- {
- if (blk_req_needs_zone_write_lock(rq))
- __blk_req_zone_write_lock(rq);
- }
- static inline void blk_req_zone_write_unlock(struct request *rq)
- {
- if (rq->rq_flags & RQF_ZONE_WRITE_LOCKED)
- __blk_req_zone_write_unlock(rq);
- }
- static inline bool blk_req_zone_is_write_locked(struct request *rq)
- {
- return rq->q->seq_zones_wlock &&
- test_bit(blk_rq_zone_no(rq), rq->q->seq_zones_wlock);
- }
- static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
- {
- if (!blk_req_needs_zone_write_lock(rq))
- return true;
- return !blk_req_zone_is_write_locked(rq);
- }
- #else
- static inline bool blk_req_needs_zone_write_lock(struct request *rq)
- {
- return false;
- }
- static inline void blk_req_zone_write_lock(struct request *rq)
- {
- }
- static inline void blk_req_zone_write_unlock(struct request *rq)
- {
- }
- static inline bool blk_req_zone_is_write_locked(struct request *rq)
- {
- return false;
- }
- static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
- {
- return true;
- }
- #endif /* CONFIG_BLK_DEV_ZONED */
- static inline void blk_wake_io_task(struct task_struct *waiter)
- {
- /*
- * If we're polling, the task itself is doing the completions. For
- * that case, we don't need to signal a wakeup, it's enough to just
- * mark us as RUNNING.
- */
- if (waiter == current)
- __set_current_state(TASK_RUNNING);
- else
- wake_up_process(waiter);
- }
- unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
- unsigned int op);
- void disk_end_io_acct(struct gendisk *disk, unsigned int op,
- unsigned long start_time);
- unsigned long part_start_io_acct(struct gendisk *disk, struct hd_struct **part,
- struct bio *bio);
- void part_end_io_acct(struct hd_struct *part, struct bio *bio,
- unsigned long start_time);
- /**
- * bio_start_io_acct - start I/O accounting for bio based drivers
- * @bio: bio to start account for
- *
- * Returns the start time that should be passed back to bio_end_io_acct().
- */
- static inline unsigned long bio_start_io_acct(struct bio *bio)
- {
- return disk_start_io_acct(bio->bi_disk, bio_sectors(bio), bio_op(bio));
- }
- /**
- * bio_end_io_acct - end I/O accounting for bio based drivers
- * @bio: bio to end account for
- * @start: start time returned by bio_start_io_acct()
- */
- static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time)
- {
- return disk_end_io_acct(bio->bi_disk, bio_op(bio), start_time);
- }
- int bdev_read_only(struct block_device *bdev);
- int set_blocksize(struct block_device *bdev, int size);
- const char *bdevname(struct block_device *bdev, char *buffer);
- struct block_device *lookup_bdev(const char *);
- void blkdev_show(struct seq_file *seqf, off_t offset);
- #define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */
- #define BDEVT_SIZE 10 /* Largest string for MAJ:MIN for blkdev */
- #ifdef CONFIG_BLOCK
- #define BLKDEV_MAJOR_MAX 512
- #else
- #define BLKDEV_MAJOR_MAX 0
- #endif
- struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
- void *holder);
- struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder);
- int bd_prepare_to_claim(struct block_device *bdev, struct block_device *whole,
- void *holder);
- void bd_abort_claiming(struct block_device *bdev, struct block_device *whole,
- void *holder);
- void blkdev_put(struct block_device *bdev, fmode_t mode);
- struct block_device *I_BDEV(struct inode *inode);
- struct block_device *bdget_part(struct hd_struct *part);
- struct block_device *bdgrab(struct block_device *bdev);
- void bdput(struct block_device *);
- #ifdef CONFIG_BLOCK
- void invalidate_bdev(struct block_device *bdev);
- int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
- loff_t lend);
- int sync_blockdev(struct block_device *bdev);
- #else
- static inline void invalidate_bdev(struct block_device *bdev)
- {
- }
- static inline int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
- loff_t lstart, loff_t lend)
- {
- return 0;
- }
- static inline int sync_blockdev(struct block_device *bdev)
- {
- return 0;
- }
- #endif
- int fsync_bdev(struct block_device *bdev);
- int freeze_bdev(struct block_device *bdev);
- int thaw_bdev(struct block_device *bdev);
- #endif /* _LINUX_BLKDEV_H */
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