| /**************************************************************************** |
| **************************************************************************** |
| *** |
| *** 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 <linux/major.h> |
| #include <linux/genhd.h> |
| #include <linux/list.h> |
| #include <linux/timer.h> |
| #include <linux/workqueue.h> |
| #include <linux/pagemap.h> |
| #include <linux/backing-dev.h> |
| #include <linux/wait.h> |
| #include <linux/mempool.h> |
| #include <linux/bio.h> |
| #include <linux/module.h> |
| #include <linux/stringify.h> |
| |
| #include <asm/scatterlist.h> |
| |
| 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 <linux/elevator.h> |
| |
| 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 |
