REQ_LB_OP_FLUSH = 0x41, /* flush request */
};
-/*
- * request type modified bits. first four bits match BIO_RW* bits, important
- */
-enum rq_flag_bits {
- __REQ_RW, /* not set, read. set, write */
- __REQ_FAILFAST_DEV, /* no driver retries of device errors */
- __REQ_FAILFAST_TRANSPORT, /* no driver retries of transport errors */
- __REQ_FAILFAST_DRIVER, /* no driver retries of driver errors */
- /* above flags must match BIO_RW_* */
- __REQ_DISCARD, /* request to discard sectors */
- __REQ_SORTED, /* elevator knows about this request */
- __REQ_SOFTBARRIER, /* may not be passed by ioscheduler */
- __REQ_HARDBARRIER, /* may not be passed by drive either */
- __REQ_FUA, /* forced unit access */
- __REQ_NOMERGE, /* don't touch this for merging */
- __REQ_STARTED, /* drive already may have started this one */
- __REQ_DONTPREP, /* don't call prep for this one */
- __REQ_QUEUED, /* uses queueing */
- __REQ_ELVPRIV, /* elevator private data attached */
- __REQ_FAILED, /* set if the request failed */
- __REQ_QUIET, /* don't worry about errors */
- __REQ_PREEMPT, /* set for "ide_preempt" requests */
- __REQ_ORDERED_COLOR, /* is before or after barrier */
- __REQ_RW_SYNC, /* request is sync (sync write or read) */
- __REQ_ALLOCED, /* request came from our alloc pool */
- __REQ_RW_META, /* metadata io request */
- __REQ_COPY_USER, /* contains copies of user pages */
- __REQ_INTEGRITY, /* integrity metadata has been remapped */
- __REQ_NOIDLE, /* Don't anticipate more IO after this one */
- __REQ_IO_STAT, /* account I/O stat */
- __REQ_MIXED_MERGE, /* merge of different types, fail separately */
- __REQ_NR_BITS, /* stops here */
-};
-
-#define REQ_RW (1 << __REQ_RW)
-#define REQ_FAILFAST_DEV (1 << __REQ_FAILFAST_DEV)
-#define REQ_FAILFAST_TRANSPORT (1 << __REQ_FAILFAST_TRANSPORT)
-#define REQ_FAILFAST_DRIVER (1 << __REQ_FAILFAST_DRIVER)
-#define REQ_DISCARD (1 << __REQ_DISCARD)
-#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_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_FAILED (1 << __REQ_FAILED)
-#define REQ_QUIET (1 << __REQ_QUIET)
-#define REQ_PREEMPT (1 << __REQ_PREEMPT)
-#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 REQ_COPY_USER (1 << __REQ_COPY_USER)
-#define REQ_INTEGRITY (1 << __REQ_INTEGRITY)
-#define REQ_NOIDLE (1 << __REQ_NOIDLE)
-#define REQ_IO_STAT (1 << __REQ_IO_STAT)
-#define REQ_MIXED_MERGE (1 << __REQ_MIXED_MERGE)
-
-#define REQ_FAILFAST_MASK (REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | \
- REQ_FAILFAST_DRIVER)
-
#define BLK_MAX_CDB 16
/*
};
/*
- * two pointers are available for the IO schedulers, if they need
+ * Three pointers are available for the IO schedulers, if they need
* more they have to dynamically allocate it.
*/
void *elevator_private;
void *elevator_private2;
+ void *elevator_private3;
struct gendisk *rq_disk;
unsigned long start_time;
-
+#ifdef CONFIG_BLK_CGROUP
+ unsigned long long start_time_ns;
+ unsigned long long io_start_time_ns; /* when passed to hardware */
+#endif
/* Number of scatter-gather DMA addr+len pairs after
* physical address coalescing is performed.
*/
#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_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
(1 << QUEUE_FLAG_CLUSTER) | \
(1 << QUEUE_FLAG_STACKABLE) | \
- (1 << QUEUE_FLAG_SAME_COMP))
+ (1 << QUEUE_FLAG_SAME_COMP) | \
+ (1 << QUEUE_FLAG_ADD_RANDOM))
static inline int queue_is_locked(struct request_queue *q)
{
test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags)
#define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags)
#define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags)
+#define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags)
#define blk_queue_flushing(q) ((q)->ordseq)
#define blk_queue_stackable(q) \
test_bit(QUEUE_FLAG_STACKABLE, &(q)->queue_flags)
#define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags)
-#define blk_fs_request(rq) ((rq)->cmd_type == REQ_TYPE_FS)
-#define blk_pc_request(rq) ((rq)->cmd_type == REQ_TYPE_BLOCK_PC)
-#define blk_special_request(rq) ((rq)->cmd_type == REQ_TYPE_SPECIAL)
-#define blk_sense_request(rq) ((rq)->cmd_type == REQ_TYPE_SENSE)
-
-#define blk_failfast_dev(rq) ((rq)->cmd_flags & REQ_FAILFAST_DEV)
-#define blk_failfast_transport(rq) ((rq)->cmd_flags & REQ_FAILFAST_TRANSPORT)
-#define blk_failfast_driver(rq) ((rq)->cmd_flags & REQ_FAILFAST_DRIVER)
-#define blk_noretry_request(rq) (blk_failfast_dev(rq) || \
- blk_failfast_transport(rq) || \
- blk_failfast_driver(rq))
-#define blk_rq_started(rq) ((rq)->cmd_flags & REQ_STARTED)
-#define blk_rq_io_stat(rq) ((rq)->cmd_flags & REQ_IO_STAT)
-#define blk_rq_quiet(rq) ((rq)->cmd_flags & REQ_QUIET)
-
-#define blk_account_rq(rq) (blk_rq_started(rq) && (blk_fs_request(rq) || blk_discard_rq(rq)))
-
-#define blk_pm_suspend_request(rq) ((rq)->cmd_type == REQ_TYPE_PM_SUSPEND)
-#define blk_pm_resume_request(rq) ((rq)->cmd_type == REQ_TYPE_PM_RESUME)
+#define blk_noretry_request(rq) \
+ ((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
+ REQ_FAILFAST_DRIVER))
+
+#define blk_account_rq(rq) \
+ (((rq)->cmd_flags & REQ_STARTED) && \
+ ((rq)->cmd_type == REQ_TYPE_FS || \
+ ((rq)->cmd_flags & REQ_DISCARD)))
+
#define blk_pm_request(rq) \
- (blk_pm_suspend_request(rq) || blk_pm_resume_request(rq))
+ ((rq)->cmd_type == REQ_TYPE_PM_SUSPEND || \
+ (rq)->cmd_type == REQ_TYPE_PM_RESUME)
#define blk_rq_cpu_valid(rq) ((rq)->cpu != -1)
-#define blk_sorted_rq(rq) ((rq)->cmd_flags & REQ_SORTED)
-#define blk_barrier_rq(rq) ((rq)->cmd_flags & REQ_HARDBARRIER)
-#define blk_fua_rq(rq) ((rq)->cmd_flags & REQ_FUA)
-#define blk_discard_rq(rq) ((rq)->cmd_flags & REQ_DISCARD)
#define blk_bidi_rq(rq) ((rq)->next_rq != NULL)
/* rq->queuelist of dequeued request must be list_empty() */
#define blk_queued_rq(rq) (!list_empty(&(rq)->queuelist))
*/
static inline bool rw_is_sync(unsigned int rw_flags)
{
- return !(rw_flags & REQ_RW) || (rw_flags & REQ_RW_SYNC);
+ return !(rw_flags & REQ_WRITE) || (rw_flags & REQ_SYNC);
}
static inline bool rq_is_sync(struct request *rq)
return rw_is_sync(rq->cmd_flags);
}
-#define rq_is_meta(rq) ((rq)->cmd_flags & REQ_RW_META)
-#define rq_noidle(rq) ((rq)->cmd_flags & REQ_NOIDLE)
-
static inline int blk_queue_full(struct request_queue *q, int sync)
{
if (sync)
(REQ_NOMERGE | REQ_STARTED | REQ_HARDBARRIER | REQ_SOFTBARRIER)
#define rq_mergeable(rq) \
(!((rq)->cmd_flags & RQ_NOMERGE_FLAGS) && \
- (blk_discard_rq(rq) || blk_fs_request((rq))))
+ (((rq)->cmd_flags & REQ_DISCARD) || \
+ (rq)->cmd_type == REQ_TYPE_FS))
/*
* q->prep_rq_fn return values
#define BLK_BOUNCE_HIGH -1ULL
#endif
#define BLK_BOUNCE_ANY (-1ULL)
-#define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD)
+#define BLK_BOUNCE_ISA (DMA_BIT_MASK(24))
/*
* default timeout for SG_IO if none specified
*/
extern struct request_queue *blk_init_queue_node(request_fn_proc *rfn,
spinlock_t *lock, int node_id);
+extern struct request_queue *blk_init_allocated_queue_node(struct request_queue *,
+ request_fn_proc *,
+ spinlock_t *, int node_id);
extern struct request_queue *blk_init_queue(request_fn_proc *, spinlock_t *);
+extern struct request_queue *blk_init_allocated_queue(struct request_queue *,
+ request_fn_proc *, spinlock_t *);
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);
return NULL;
return bqt->tag_index[tag];
}
-
-extern int blkdev_issue_flush(struct block_device *, sector_t *);
-#define DISCARD_FL_WAIT 0x01 /* wait for completion */
-#define DISCARD_FL_BARRIER 0x02 /* issue DISCARD_BARRIER request */
-extern int blkdev_issue_discard(struct block_device *, sector_t sector,
- sector_t nr_sects, gfp_t, int flags);
-
+enum{
+ BLKDEV_WAIT, /* wait for completion */
+ BLKDEV_BARRIER, /*issue request with barrier */
+};
+#define BLKDEV_IFL_WAIT (1 << BLKDEV_WAIT)
+#define BLKDEV_IFL_BARRIER (1 << BLKDEV_BARRIER)
+extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *,
+ unsigned long);
+extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
+ sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
+extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
+ sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
static inline int sb_issue_discard(struct super_block *sb,
sector_t block, sector_t nr_blocks)
{
block <<= (sb->s_blocksize_bits - 9);
nr_blocks <<= (sb->s_blocksize_bits - 9);
return blkdev_issue_discard(sb->s_bdev, block, nr_blocks, GFP_KERNEL,
- DISCARD_FL_BARRIER);
+ BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
}
extern int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm);
struct work_struct;
int kblockd_schedule_work(struct request_queue *q, struct work_struct *work);
+#ifdef CONFIG_BLK_CGROUP
+/*
+ * This should not be using sched_clock(). A real patch is in progress
+ * to fix this up, until that is in place we need to disable preemption
+ * around sched_clock() in this function and set_io_start_time_ns().
+ */
+static inline void set_start_time_ns(struct request *req)
+{
+ preempt_disable();
+ req->start_time_ns = sched_clock();
+ preempt_enable();
+}
+
+static inline void set_io_start_time_ns(struct request *req)
+{
+ preempt_disable();
+ req->io_start_time_ns = sched_clock();
+ preempt_enable();
+}
+
+static inline uint64_t rq_start_time_ns(struct request *req)
+{
+ return req->start_time_ns;
+}
+
+static inline uint64_t rq_io_start_time_ns(struct request *req)
+{
+ return req->io_start_time_ns;
+}
+#else
+static inline void set_start_time_ns(struct request *req) {}
+static inline void set_io_start_time_ns(struct request *req) {}
+static inline uint64_t rq_start_time_ns(struct request *req)
+{
+ return 0;
+}
+static inline uint64_t rq_io_start_time_ns(struct request *req)
+{
+ return 0;
+}
+#endif
+
#define MODULE_ALIAS_BLOCKDEV(major,minor) \
MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))
#define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
int (*direct_access) (struct block_device *, sector_t,
void **, unsigned long *);
int (*media_changed) (struct gendisk *);
- unsigned long long (*set_capacity) (struct gendisk *,
- unsigned long long);
+ void (*unlock_native_capacity) (struct gendisk *);
int (*revalidate_disk) (struct gendisk *);
int (*getgeo)(struct block_device *, struct hd_geometry *);
+ /* this callback is with swap_lock and sometimes page table lock held */
+ void (*swap_slot_free_notify) (struct block_device *, unsigned long);
struct module *owner;
};
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff