diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 164 |
1 files changed, 117 insertions, 47 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 646b462d04d..2ad95fa1d13 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -108,13 +108,20 @@ struct request { /* * Three pointers are available for the IO schedulers, if they need - * more they have to dynamically allocate it. + * 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 three elevator_private pointers. */ - void *elevator_private; - void *elevator_private2; - void *elevator_private3; + union { + void *elevator_private[3]; + struct { + unsigned int seq; + struct list_head list; + } flush; + }; struct gendisk *rq_disk; + struct hd_struct *part; unsigned long start_time; #ifdef CONFIG_BLK_CGROUP unsigned long long start_time_ns; @@ -189,7 +196,6 @@ typedef void (request_fn_proc) (struct request_queue *q); typedef int (make_request_fn) (struct request_queue *q, struct bio *bio); typedef int (prep_rq_fn) (struct request_queue *, struct request *); typedef void (unprep_rq_fn) (struct request_queue *, struct request *); -typedef void (unplug_fn) (struct request_queue *); struct bio_vec; struct bvec_merge_data { @@ -250,7 +256,7 @@ struct queue_limits { unsigned char misaligned; unsigned char discard_misaligned; - unsigned char no_cluster; + unsigned char cluster; signed char discard_zeroes_data; }; @@ -272,7 +278,6 @@ struct request_queue make_request_fn *make_request_fn; prep_rq_fn *prep_rq_fn; unprep_rq_fn *unprep_rq_fn; - unplug_fn *unplug_fn; merge_bvec_fn *merge_bvec_fn; softirq_done_fn *softirq_done_fn; rq_timed_out_fn *rq_timed_out_fn; @@ -286,12 +291,9 @@ struct request_queue struct request *boundary_rq; /* - * Auto-unplugging state + * Delayed queue handling */ - struct timer_list unplug_timer; - int unplug_thresh; /* After this many requests */ - unsigned long unplug_delay; /* After this many jiffies */ - struct work_struct unplug_work; + struct delayed_work delay_work; struct backing_dev_info backing_dev_info; @@ -362,11 +364,12 @@ struct request_queue * for flush operations */ unsigned int flush_flags; - unsigned int flush_seq; - int flush_err; + unsigned int flush_pending_idx:1; + unsigned int flush_running_idx:1; + unsigned long flush_pending_since; + struct list_head flush_queue[2]; + struct list_head flush_data_in_flight; struct request flush_rq; - struct request *orig_flush_rq; - struct list_head pending_flushes; struct mutex sysfs_lock; @@ -380,30 +383,26 @@ struct request_queue #endif }; -#define QUEUE_FLAG_CLUSTER 0 /* cluster several segments into 1 */ #define QUEUE_FLAG_QUEUED 1 /* uses generic tag queueing */ #define QUEUE_FLAG_STOPPED 2 /* queue is stopped */ #define QUEUE_FLAG_SYNCFULL 3 /* read queue has been filled */ #define QUEUE_FLAG_ASYNCFULL 4 /* write queue has been filled */ #define QUEUE_FLAG_DEAD 5 /* queue being torn down */ -#define QUEUE_FLAG_REENTER 6 /* Re-entrancy avoidance */ -#define QUEUE_FLAG_PLUGGED 7 /* queue is plugged */ -#define QUEUE_FLAG_ELVSWITCH 8 /* don't use elevator, just do FIFO */ -#define QUEUE_FLAG_BIDI 9 /* queue supports bidi requests */ -#define QUEUE_FLAG_NOMERGES 10 /* disable merge attempts */ -#define QUEUE_FLAG_SAME_COMP 11 /* force complete on same CPU */ -#define QUEUE_FLAG_FAIL_IO 12 /* fake timeout */ -#define QUEUE_FLAG_STACKABLE 13 /* supports request stacking */ -#define QUEUE_FLAG_NONROT 14 /* non-rotational device (SSD) */ +#define QUEUE_FLAG_ELVSWITCH 6 /* don't use elevator, just do FIFO */ +#define QUEUE_FLAG_BIDI 7 /* queue supports bidi requests */ +#define QUEUE_FLAG_NOMERGES 8 /* disable merge attempts */ +#define QUEUE_FLAG_SAME_COMP 9 /* force complete on same CPU */ +#define QUEUE_FLAG_FAIL_IO 10 /* fake timeout */ +#define QUEUE_FLAG_STACKABLE 11 /* supports request stacking */ +#define QUEUE_FLAG_NONROT 12 /* non-rotational device (SSD) */ #define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */ -#define QUEUE_FLAG_IO_STAT 15 /* do IO stats */ -#define QUEUE_FLAG_DISCARD 16 /* supports DISCARD */ -#define QUEUE_FLAG_NOXMERGES 17 /* No extended merges */ -#define QUEUE_FLAG_ADD_RANDOM 18 /* Contributes to random pool */ -#define QUEUE_FLAG_SECDISCARD 19 /* supports SECDISCARD */ +#define QUEUE_FLAG_IO_STAT 13 /* do IO stats */ +#define QUEUE_FLAG_DISCARD 14 /* supports DISCARD */ +#define QUEUE_FLAG_NOXMERGES 15 /* No extended merges */ +#define QUEUE_FLAG_ADD_RANDOM 16 /* Contributes to random pool */ +#define QUEUE_FLAG_SECDISCARD 17 /* supports SECDISCARD */ #define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \ - (1 << QUEUE_FLAG_CLUSTER) | \ (1 << QUEUE_FLAG_STACKABLE) | \ (1 << QUEUE_FLAG_SAME_COMP) | \ (1 << QUEUE_FLAG_ADD_RANDOM)) @@ -473,7 +472,6 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q) __clear_bit(flag, &q->queue_flags); } -#define blk_queue_plugged(q) test_bit(QUEUE_FLAG_PLUGGED, &(q)->queue_flags) #define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags) #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags) #define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags) @@ -510,6 +508,11 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q) #define rq_data_dir(rq) ((rq)->cmd_flags & 1) +static inline unsigned int blk_queue_cluster(struct request_queue *q) +{ + return q->limits.cluster; +} + /* * We regard a request as sync, if either a read or a sync write */ @@ -552,8 +555,7 @@ static inline void blk_clear_queue_full(struct request_queue *q, int sync) * it already be started by driver. */ #define RQ_NOMERGE_FLAGS \ - (REQ_NOMERGE | REQ_STARTED | REQ_HARDBARRIER | REQ_SOFTBARRIER | \ - REQ_FLUSH | REQ_FUA) + (REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_FLUSH | REQ_FUA) #define rq_mergeable(rq) \ (!((rq)->cmd_flags & RQ_NOMERGE_FLAGS) && \ (((rq)->cmd_flags & REQ_DISCARD) || \ @@ -644,7 +646,6 @@ static inline void rq_flush_dcache_pages(struct request *rq) extern int blk_register_queue(struct gendisk *disk); extern void blk_unregister_queue(struct gendisk *disk); -extern void register_disk(struct gendisk *dev); extern void generic_make_request(struct bio *bio); extern void blk_rq_init(struct request_queue *q, struct request *rq); extern void blk_put_request(struct request *); @@ -665,9 +666,7 @@ extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src, extern void blk_rq_unprep_clone(struct request *rq); extern int blk_insert_cloned_request(struct request_queue *q, struct request *rq); -extern void blk_plug_device(struct request_queue *); -extern void blk_plug_device_unlocked(struct request_queue *); -extern int blk_remove_plug(struct request_queue *); +extern void blk_delay_queue(struct request_queue *, unsigned long); extern void blk_recount_segments(struct request_queue *, struct bio *); extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t, unsigned int, void __user *); @@ -697,8 +696,9 @@ extern void blk_start_queue(struct request_queue *q); extern void blk_stop_queue(struct request_queue *q); extern void blk_sync_queue(struct request_queue *q); extern void __blk_stop_queue(struct request_queue *q); -extern void __blk_run_queue(struct request_queue *); +extern void __blk_run_queue(struct request_queue *q); extern void blk_run_queue(struct request_queue *); +extern void blk_run_queue_async(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); @@ -711,7 +711,6 @@ extern int 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 *); -extern void blk_unplug(struct request_queue *q); static inline struct request_queue *bdev_get_queue(struct block_device *bdev) { @@ -806,6 +805,7 @@ extern struct request_queue *blk_init_allocated_queue(struct request_queue *, extern void blk_cleanup_queue(struct request_queue *); extern void blk_queue_make_request(struct request_queue *, make_request_fn *); extern void blk_queue_bounce_limit(struct request_queue *, u64); +extern void blk_limits_max_hw_sectors(struct queue_limits *, unsigned int); extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int); extern void blk_queue_max_segments(struct request_queue *, unsigned short); extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); @@ -847,7 +847,6 @@ extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bd extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *); extern void blk_dump_rq_flags(struct request *, char *); -extern void generic_unplug_device(struct request_queue *); extern long nr_blockdev_pages(void); int blk_get_queue(struct request_queue *); @@ -855,6 +854,44 @@ struct request_queue *blk_alloc_queue(gfp_t); struct request_queue *blk_alloc_queue_node(gfp_t, int); extern void blk_put_queue(struct request_queue *); +struct blk_plug { + unsigned long magic; + struct list_head list; + struct list_head cb_list; + unsigned int should_sort; +}; +struct blk_plug_cb { + struct list_head list; + void (*callback)(struct blk_plug_cb *); +}; + +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->list) || !list_empty(&plug->cb_list)); +} + /* * tag stuff */ @@ -891,6 +928,14 @@ static inline int sb_issue_discard(struct super_block *sb, sector_t block, nr_blocks << (sb->s_blocksize_bits - 9), 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 - 9), + nr_blocks << (sb->s_blocksize_bits - 9), + gfp_mask); +} extern int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm); @@ -1077,7 +1122,6 @@ static inline void put_dev_sector(Sector p) struct work_struct; int kblockd_schedule_work(struct request_queue *q, struct work_struct *work); -int kblockd_schedule_delayed_work(struct request_queue *q, struct delayed_work *dwork, unsigned long delay); #ifdef CONFIG_BLK_CGROUP /* @@ -1125,8 +1169,6 @@ static inline uint64_t rq_io_start_time_ns(struct request *req) extern int blk_throtl_init(struct request_queue *q); extern void blk_throtl_exit(struct request_queue *q); extern int blk_throtl_bio(struct request_queue *q, struct bio **bio); -extern void throtl_schedule_delayed_work(struct request_queue *q, unsigned long delay); -extern void throtl_shutdown_timer_wq(struct request_queue *q); #else /* CONFIG_BLK_DEV_THROTTLING */ static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio) { @@ -1135,8 +1177,6 @@ static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio) static inline int blk_throtl_init(struct request_queue *q) { return 0; } static inline int blk_throtl_exit(struct request_queue *q) { return 0; } -static inline void throtl_schedule_delayed_work(struct request_queue *q, unsigned long delay) {} -static inline void throtl_shutdown_timer_wq(struct request_queue *q) {} #endif /* CONFIG_BLK_DEV_THROTTLING */ #define MODULE_ALIAS_BLOCKDEV(major,minor) \ @@ -1179,6 +1219,7 @@ struct blk_integrity { struct kobject kobj; }; +extern bool blk_integrity_is_initialized(struct gendisk *); extern int blk_integrity_register(struct gendisk *, struct blk_integrity *); extern void blk_integrity_unregister(struct gendisk *); extern int blk_integrity_compare(struct gendisk *, struct gendisk *); @@ -1235,6 +1276,7 @@ queue_max_integrity_segments(struct request_queue *q) #define queue_max_integrity_segments(a) (0) #define blk_integrity_merge_rq(a, b, c) (0) #define blk_integrity_merge_bio(a, b, c) (0) +#define blk_integrity_is_initialized(a) (0) #endif /* CONFIG_BLK_DEV_INTEGRITY */ @@ -1245,6 +1287,9 @@ struct block_device_operations { int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*direct_access) (struct block_device *, sector_t, void **, unsigned long *); + unsigned int (*check_events) (struct gendisk *disk, + unsigned int clearing); + /* ->media_changed() is DEPRECATED, use ->check_events() instead */ int (*media_changed) (struct gendisk *); void (*unlock_native_capacity) (struct gendisk *); int (*revalidate_disk) (struct gendisk *); @@ -1267,6 +1312,31 @@ static inline long nr_blockdev_pages(void) return 0; } +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; +} + #endif /* CONFIG_BLOCK */ #endif |