diff --git a/libc/kernel/common/linux/blkdev.h b/libc/kernel/common/linux/blkdev.h
new file mode 100644
index 0000000..3004524
--- /dev/null
+++ b/libc/kernel/common/linux/blkdev.h
@@ -0,0 +1,461 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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