/**************************************************************************** **************************************************************************** *** *** This header was automatically generated from a Linux kernel header *** of the same name, to make information necessary for userspace to *** call into the kernel available to libc. It contains only constants, *** structures, and macros generated from the original header, and thus, *** contains no copyrightable information. *** **************************************************************************** ****************************************************************************/ #ifndef _LINUX_BLKDEV_H #define _LINUX_BLKDEV_H #include #include #include #include #include #include #include #include #include #include #include #include #include struct scsi_ioctl_command; struct request_queue; typedef struct request_queue request_queue_t; struct elevator_queue; typedef struct elevator_queue elevator_t; struct request_pm_state; struct blk_trace; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 struct as_io_context { spinlock_t lock; void (*dtor)(struct as_io_context *aic); void (*exit)(struct as_io_context *aic); unsigned long state; atomic_t nr_queued; atomic_t nr_dispatched; unsigned long last_end_request; unsigned long ttime_total; unsigned long ttime_samples; unsigned long ttime_mean; unsigned int seek_samples; sector_t last_request_pos; u64 seek_total; sector_t seek_mean; }; struct cfq_queue; struct cfq_io_context { struct rb_node rb_node; void *key; struct cfq_queue *cfqq[2]; struct io_context *ioc; unsigned long last_end_request; sector_t last_request_pos; unsigned long last_queue; unsigned long ttime_total; unsigned long ttime_samples; unsigned long ttime_mean; unsigned int seek_samples; u64 seek_total; sector_t seek_mean; struct list_head queue_list; void (*dtor)(struct io_context *); void (*exit)(struct io_context *); }; struct io_context { atomic_t refcount; struct task_struct *task; int (*set_ioprio)(struct io_context *, unsigned int); unsigned long last_waited; int nr_batch_requests; struct as_io_context *aic; struct rb_root cic_root; }; struct io_context *current_io_context(gfp_t gfp_flags); struct io_context *get_io_context(gfp_t gfp_flags); struct request; typedef void (rq_end_io_fn)(struct request *, int); struct request_list { int count[2]; int starved[2]; int elvpriv; mempool_t *rq_pool; wait_queue_head_t wait[2]; }; #define BLK_MAX_CDB 16 struct request { struct list_head queuelist; struct list_head donelist; unsigned long flags; sector_t sector; unsigned long nr_sectors; unsigned int current_nr_sectors; sector_t hard_sector; unsigned long hard_nr_sectors; unsigned int hard_cur_sectors; struct bio *bio; struct bio *biotail; void *elevator_private; void *completion_data; int rq_status; int errors; struct gendisk *rq_disk; unsigned long start_time; unsigned short nr_phys_segments; unsigned short nr_hw_segments; unsigned short ioprio; int tag; int ref_count; request_queue_t *q; struct request_list *rl; struct completion *waiting; void *special; char *buffer; unsigned int cmd_len; unsigned char cmd[BLK_MAX_CDB]; unsigned int data_len; unsigned int sense_len; void *data; void *sense; unsigned int timeout; int retries; rq_end_io_fn *end_io; void *end_io_data; }; enum rq_flag_bits { __REQ_RW, __REQ_FAILFAST, __REQ_SORTED, __REQ_SOFTBARRIER, __REQ_HARDBARRIER, __REQ_FUA, __REQ_CMD, __REQ_NOMERGE, __REQ_STARTED, __REQ_DONTPREP, __REQ_QUEUED, __REQ_ELVPRIV, __REQ_PC, __REQ_BLOCK_PC, __REQ_SENSE, __REQ_FAILED, __REQ_QUIET, __REQ_SPECIAL, __REQ_DRIVE_CMD, __REQ_DRIVE_TASK, __REQ_DRIVE_TASKFILE, __REQ_PREEMPT, __REQ_PM_SUSPEND, __REQ_PM_RESUME, __REQ_PM_SHUTDOWN, __REQ_ORDERED_COLOR, __REQ_RW_SYNC, __REQ_NR_BITS, }; #define REQ_RW (1 << __REQ_RW) #define REQ_FAILFAST (1 << __REQ_FAILFAST) #define REQ_SORTED (1 << __REQ_SORTED) #define REQ_SOFTBARRIER (1 << __REQ_SOFTBARRIER) #define REQ_HARDBARRIER (1 << __REQ_HARDBARRIER) #define REQ_FUA (1 << __REQ_FUA) #define REQ_CMD (1 << __REQ_CMD) #define REQ_NOMERGE (1 << __REQ_NOMERGE) #define REQ_STARTED (1 << __REQ_STARTED) #define REQ_DONTPREP (1 << __REQ_DONTPREP) #define REQ_QUEUED (1 << __REQ_QUEUED) #define REQ_ELVPRIV (1 << __REQ_ELVPRIV) #define REQ_PC (1 << __REQ_PC) #define REQ_BLOCK_PC (1 << __REQ_BLOCK_PC) #define REQ_SENSE (1 << __REQ_SENSE) #define REQ_FAILED (1 << __REQ_FAILED) #define REQ_QUIET (1 << __REQ_QUIET) #define REQ_SPECIAL (1 << __REQ_SPECIAL) #define REQ_DRIVE_CMD (1 << __REQ_DRIVE_CMD) #define REQ_DRIVE_TASK (1 << __REQ_DRIVE_TASK) #define REQ_DRIVE_TASKFILE (1 << __REQ_DRIVE_TASKFILE) #define REQ_PREEMPT (1 << __REQ_PREEMPT) #define REQ_PM_SUSPEND (1 << __REQ_PM_SUSPEND) #define REQ_PM_RESUME (1 << __REQ_PM_RESUME) #define REQ_PM_SHUTDOWN (1 << __REQ_PM_SHUTDOWN) #define REQ_ORDERED_COLOR (1 << __REQ_ORDERED_COLOR) #define REQ_RW_SYNC (1 << __REQ_RW_SYNC) struct request_pm_state { int pm_step; u32 pm_state; void* data; }; #include typedef int (merge_request_fn) (request_queue_t *, struct request *, struct bio *); typedef int (merge_requests_fn) (request_queue_t *, struct request *, struct request *); typedef void (request_fn_proc) (request_queue_t *q); typedef int (make_request_fn) (request_queue_t *q, struct bio *bio); typedef int (prep_rq_fn) (request_queue_t *, struct request *); typedef void (unplug_fn) (request_queue_t *); struct bio_vec; typedef int (merge_bvec_fn) (request_queue_t *, struct bio *, struct bio_vec *); typedef void (activity_fn) (void *data, int rw); typedef int (issue_flush_fn) (request_queue_t *, struct gendisk *, sector_t *); typedef void (prepare_flush_fn) (request_queue_t *, struct request *); typedef void (softirq_done_fn)(struct request *); enum blk_queue_state { Queue_down, Queue_up, }; struct blk_queue_tag { struct request **tag_index; unsigned long *tag_map; struct list_head busy_list; int busy; int max_depth; int real_max_depth; atomic_t refcnt; }; struct request_queue { struct list_head queue_head; struct request *last_merge; elevator_t *elevator; struct request_list rq; request_fn_proc *request_fn; merge_request_fn *back_merge_fn; merge_request_fn *front_merge_fn; merge_requests_fn *merge_requests_fn; make_request_fn *make_request_fn; prep_rq_fn *prep_rq_fn; unplug_fn *unplug_fn; merge_bvec_fn *merge_bvec_fn; activity_fn *activity_fn; issue_flush_fn *issue_flush_fn; prepare_flush_fn *prepare_flush_fn; softirq_done_fn *softirq_done_fn; sector_t end_sector; struct request *boundary_rq; struct timer_list unplug_timer; int unplug_thresh; unsigned long unplug_delay; struct work_struct unplug_work; struct backing_dev_info backing_dev_info; void *queuedata; void *activity_data; unsigned long bounce_pfn; gfp_t bounce_gfp; unsigned long queue_flags; spinlock_t __queue_lock; spinlock_t *queue_lock; struct kobject kobj; unsigned long nr_requests; unsigned int nr_congestion_on; unsigned int nr_congestion_off; unsigned int nr_batching; unsigned int max_sectors; unsigned int max_hw_sectors; unsigned short max_phys_segments; unsigned short max_hw_segments; unsigned short hardsect_size; unsigned int max_segment_size; unsigned long seg_boundary_mask; unsigned int dma_alignment; struct blk_queue_tag *queue_tags; unsigned int nr_sorted; unsigned int in_flight; unsigned int sg_timeout; unsigned int sg_reserved_size; int node; struct blk_trace *blk_trace; unsigned int ordered, next_ordered, ordseq; int orderr, ordcolor; struct request pre_flush_rq, bar_rq, post_flush_rq; struct request *orig_bar_rq; unsigned int bi_size; struct mutex sysfs_lock; }; #define RQ_INACTIVE (-1) #define RQ_ACTIVE 1 #define QUEUE_FLAG_CLUSTER 0 #define QUEUE_FLAG_QUEUED 1 #define QUEUE_FLAG_STOPPED 2 #define QUEUE_FLAG_READFULL 3 #define QUEUE_FLAG_WRITEFULL 4 #define QUEUE_FLAG_DEAD 5 #define QUEUE_FLAG_REENTER 6 #define QUEUE_FLAG_PLUGGED 7 #define QUEUE_FLAG_ELVSWITCH 8 enum { QUEUE_ORDERED_NONE = 0x00, QUEUE_ORDERED_DRAIN = 0x01, QUEUE_ORDERED_TAG = 0x02, QUEUE_ORDERED_PREFLUSH = 0x10, QUEUE_ORDERED_POSTFLUSH = 0x20, QUEUE_ORDERED_FUA = 0x40, QUEUE_ORDERED_DRAIN_FLUSH = QUEUE_ORDERED_DRAIN | QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH, QUEUE_ORDERED_DRAIN_FUA = QUEUE_ORDERED_DRAIN | QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_FUA, QUEUE_ORDERED_TAG_FLUSH = QUEUE_ORDERED_TAG | QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH, QUEUE_ORDERED_TAG_FUA = QUEUE_ORDERED_TAG | QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_FUA, QUEUE_ORDSEQ_STARTED = 0x01, QUEUE_ORDSEQ_DRAIN = 0x02, QUEUE_ORDSEQ_PREFLUSH = 0x04, QUEUE_ORDSEQ_BAR = 0x08, QUEUE_ORDSEQ_POSTFLUSH = 0x10, QUEUE_ORDSEQ_DONE = 0x20, }; #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_flushing(q) ((q)->ordseq) #define blk_fs_request(rq) ((rq)->flags & REQ_CMD) #define blk_pc_request(rq) ((rq)->flags & REQ_BLOCK_PC) #define blk_noretry_request(rq) ((rq)->flags & REQ_FAILFAST) #define blk_rq_started(rq) ((rq)->flags & REQ_STARTED) #define blk_account_rq(rq) (blk_rq_started(rq) && blk_fs_request(rq)) #define blk_pm_suspend_request(rq) ((rq)->flags & REQ_PM_SUSPEND) #define blk_pm_resume_request(rq) ((rq)->flags & REQ_PM_RESUME) #define blk_pm_request(rq) ((rq)->flags & (REQ_PM_SUSPEND | REQ_PM_RESUME)) #define blk_sorted_rq(rq) ((rq)->flags & REQ_SORTED) #define blk_barrier_rq(rq) ((rq)->flags & REQ_HARDBARRIER) #define blk_fua_rq(rq) ((rq)->flags & REQ_FUA) #define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist) #define rq_data_dir(rq) ((rq)->flags & 1) #define RQ_NOMERGE_FLAGS (REQ_NOMERGE | REQ_STARTED | REQ_HARDBARRIER | REQ_SOFTBARRIER) #define rq_mergeable(rq) (!((rq)->flags & RQ_NOMERGE_FLAGS) && blk_fs_request((rq))) #define blk_queue_headactive(q, head_active) #define BLKPREP_OK 0 #define BLKPREP_KILL 1 #define BLKPREP_DEFER 2 #define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT) #define BLK_BOUNCE_ANY ((u64)blk_max_pfn << PAGE_SHIFT) #define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD) #define rq_for_each_bio(_bio, rq) if ((rq->bio)) for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next) #define end_io_error(uptodate) (unlikely((uptodate) <= 0)) #define blk_queue_tag_depth(q) ((q)->queue_tags->busy) #define blk_queue_tag_queue(q) ((q)->queue_tags->busy < (q)->queue_tags->max_depth) #define blk_rq_tagged(rq) ((rq)->flags & REQ_QUEUED) #define MAX_PHYS_SEGMENTS 128 #define MAX_HW_SEGMENTS 128 #define SAFE_MAX_SECTORS 255 #define BLK_DEF_MAX_SECTORS 1024 #define MAX_SEGMENT_SIZE 65536 #define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist) #define blk_finished_io(nsects) do { } while (0) #define blk_started_io(nsects) do { } while (0) #define sector_div(n, b)( { int _res; _res = (n) % (b); (n) /= (b); _res; } ) #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) "-*") #endif