#ifndef _LINUX_BLKDEV_H
#define _LINUX_BLKDEV_H
+#include <linux/sched.h>
#include <linux/major.h>
#include <linux/genhd.h>
#include <linux/list.h>
#include <asm/scatterlist.h>
+#ifdef CONFIG_LBD
+# include <asm/div64.h>
+# define sector_div(a, b) do_div(a, b)
+#else
+# define sector_div(n, b)( \
+{ \
+ int _res; \
+ _res = (n) % (b); \
+ (n) /= (b); \
+ _res; \
+} \
+)
+#endif
+
+#ifdef CONFIG_BLOCK
+
struct scsi_ioctl_command;
struct request_queue;
atomic_t refcount;
struct task_struct *task;
- int (*set_ioprio)(struct io_context *, unsigned int);
+ unsigned int ioprio_changed;
/*
* For request batching
void put_io_context(struct io_context *ioc);
void exit_io_context(void);
-struct io_context *current_io_context(gfp_t gfp_flags);
-struct io_context *get_io_context(gfp_t gfp_flags);
+struct io_context *get_io_context(gfp_t gfp_flags, int node);
void copy_io_context(struct io_context **pdst, struct io_context **psrc);
void swap_io_context(struct io_context **ioc1, struct io_context **ioc2);
__REQ_ORDERED_COLOR, /* is before or after barrier */
__REQ_RW_SYNC, /* request is sync (O_DIRECT) */
__REQ_ALLOCED, /* request came from our alloc pool */
+ __REQ_RW_META, /* metadata io request */
__REQ_NR_BITS, /* stops here */
};
#define REQ_ORDERED_COLOR (1 << __REQ_ORDERED_COLOR)
#define REQ_RW_SYNC (1 << __REQ_RW_SYNC)
#define REQ_ALLOCED (1 << __REQ_ALLOCED)
+#define REQ_RW_META (1 << __REQ_RW_META)
#define BLK_MAX_CDB 16
struct list_head queuelist;
struct list_head donelist;
+ request_queue_t *q;
+
unsigned int cmd_flags;
enum rq_cmd_type_bits cmd_type;
*/
sector_t sector; /* next sector to submit */
+ sector_t hard_sector; /* next sector to complete */
unsigned long nr_sectors; /* no. of sectors left to submit */
+ unsigned long hard_nr_sectors; /* no. of sectors left to complete */
/* no. of sectors left to submit in the current segment */
unsigned int current_nr_sectors;
- sector_t hard_sector; /* next sector to complete */
- unsigned long hard_nr_sectors; /* no. of sectors left to complete */
/* no. of sectors left to complete in the current segment */
unsigned int hard_cur_sectors;
struct bio *biotail;
struct hlist_node hash; /* merge hash */
- struct rb_node rb_node; /* sort/lookup */
+ /*
+ * 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 */
+ void *completion_data;
+ };
/*
* two pointers are available for the IO schedulers, if they need
void *elevator_private;
void *elevator_private2;
- void *completion_data;
-
struct gendisk *rq_disk;
unsigned long start_time;
unsigned short ioprio;
- request_queue_t *q;
-
void *special;
char *buffer;
* We regard a request as sync, if it's a READ or a SYNC write.
*/
#define rq_is_sync(rq) (rq_data_dir((rq)) == READ || (rq)->cmd_flags & REQ_RW_SYNC)
+#define rq_is_meta(rq) ((rq)->cmd_flags & REQ_RW_META)
static inline int blk_queue_full(struct request_queue *q, int rw)
{
#define rq_mergeable(rq) \
(!((rq)->cmd_flags & RQ_NOMERGE_FLAGS) && blk_fs_request((rq)))
-/*
- * noop, requests are automagically marked as active/inactive by I/O
- * scheduler -- see elv_next_request
- */
-#define blk_queue_headactive(q, head_active)
-
/*
* q->prep_rq_fn return values
*/
if ((rq->bio)) \
for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next)
-struct sec_size {
- unsigned block_size;
- unsigned block_size_bits;
-};
-
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 blk_sync_queue(struct request_queue *q);
extern void __blk_stop_queue(request_queue_t *q);
extern void blk_run_queue(request_queue_t *);
+extern void blk_start_queueing(request_queue_t *);
extern void blk_queue_activity_fn(request_queue_t *, activity_fn *, void *);
extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned int);
extern int blk_rq_unmap_user(struct bio *, unsigned int);
extern void end_request(struct request *req, int uptodate);
extern void blk_complete_request(struct request *);
-static inline int rq_all_done(struct request *rq, unsigned int nr_bytes)
-{
- if (blk_fs_request(rq))
- return (nr_bytes >= (rq->hard_nr_sectors << 9));
- else if (blk_pc_request(rq))
- return nr_bytes >= rq->data_len;
-
- return 0;
-}
-
/*
* end_that_request_first/chunk() takes an uptodate argument. we account
* any value <= as an io error. 0 means -EIO for compatability reasons,
return retval;
}
-static inline int bdev_dma_aligment(struct block_device *bdev)
-{
- return queue_dma_alignment(bdev_get_queue(bdev));
-}
-
-#define blk_finished_io(nsects) do { } while (0)
-#define blk_started_io(nsects) do { } while (0)
-
/* assumes size > 256 */
static inline unsigned int blksize_bits(unsigned int size)
{
int kblockd_schedule_work(struct work_struct *work);
void kblockd_flush(void);
-#ifdef CONFIG_LBD
-# include <asm/div64.h>
-# define sector_div(a, b) do_div(a, b)
-#else
-# define sector_div(n, b)( \
-{ \
- int _res; \
- _res = (n) % (b); \
- (n) /= (b); \
- _res; \
-} \
-)
-#endif
-
#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) "-*")
+#else /* CONFIG_BLOCK */
+/*
+ * stubs for when the block layer is configured out
+ */
+#define buffer_heads_over_limit 0
+
+static inline long blk_congestion_wait(int rw, long timeout)
+{
+ return io_schedule_timeout(timeout);
+}
+
+static inline long nr_blockdev_pages(void)
+{
+ return 0;
+}
+
+static inline void exit_io_context(void)
+{
+}
+
+#endif /* CONFIG_BLOCK */
+
#endif
git.openpandora.org / pandora-kernel.git / blobdiff