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authorLinus Torvalds <torvalds@linux-foundation.org>2015-06-25 14:29:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-25 14:29:53 -0700
commitbfffa1cc9db8a950dd4b1a09999f8a20e69a6652 (patch)
tree01b046072ca9105b7852f790762f7b00b72e6ff7 /include/linux/blkdev.h
parentcc8a0a943948d1b1bc803b37486831af7b04dd38 (diff)
parentae994ea972473c0ace9d55f718b60f0727af1381 (diff)
Merge branch 'for-4.2/core' of git://git.kernel.dk/linux-block
Pull core block IO update from Jens Axboe: "Nothing really major in here, mostly a collection of smaller optimizations and cleanups, mixed with various fixes. In more detail, this contains: - Addition of policy specific data to blkcg for block cgroups. From Arianna Avanzini. - Various cleanups around command types from Christoph. - Cleanup of the suspend block I/O path from Christoph. - Plugging updates from Shaohua and Jeff Moyer, for blk-mq. - Eliminating atomic inc/dec of both remaining IO count and reference count in a bio. From me. - Fixes for SG gap and chunk size support for data-less (discards) IO, so we can merge these better. From me. - Small restructuring of blk-mq shared tag support, freeing drivers from iterating hardware queues. From Keith Busch. - A few cfq-iosched tweaks, from Tahsin Erdogan and me. Makes the IOPS mode the default for non-rotational storage" * 'for-4.2/core' of git://git.kernel.dk/linux-block: (35 commits) cfq-iosched: fix other locations where blkcg_to_cfqgd() can return NULL cfq-iosched: fix sysfs oops when attempting to read unconfigured weights cfq-iosched: move group scheduling functions under ifdef cfq-iosched: fix the setting of IOPS mode on SSDs blktrace: Add blktrace.c to BLOCK LAYER in MAINTAINERS file block, cgroup: implement policy-specific per-blkcg data block: Make CFQ default to IOPS mode on SSDs block: add blk_set_queue_dying() to blkdev.h blk-mq: Shared tag enhancements block: don't honor chunk sizes for data-less IO block: only honor SG gap prevention for merges that contain data block: fix returnvar.cocci warnings block, dm: don't copy bios for request clones block: remove management of bi_remaining when restoring original bi_end_io block: replace trylock with mutex_lock in blkdev_reread_part() block: export blkdev_reread_part() and __blkdev_reread_part() suspend: simplify block I/O handling block: collapse bio bit space block: remove unused BIO_RW_BLOCK and BIO_EOF flags block: remove BIO_EOPNOTSUPP ...
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r--include/linux/blkdev.h45
1 files changed, 7 insertions, 38 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5d93a6645e88..a6ae5f9bee49 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -30,7 +30,6 @@ struct scsi_ioctl_command;
struct request_queue;
struct elevator_queue;
-struct request_pm_state;
struct blk_trace;
struct request;
struct sg_io_hdr;
@@ -75,18 +74,7 @@ struct request_list {
enum rq_cmd_type_bits {
REQ_TYPE_FS = 1, /* fs request */
REQ_TYPE_BLOCK_PC, /* scsi command */
- REQ_TYPE_SENSE, /* sense request */
- REQ_TYPE_PM_SUSPEND, /* suspend request */
- REQ_TYPE_PM_RESUME, /* resume request */
- REQ_TYPE_PM_SHUTDOWN, /* shutdown request */
- REQ_TYPE_SPECIAL, /* driver defined type */
- /*
- * for ATA/ATAPI devices. this really doesn't belong here, ide should
- * use REQ_TYPE_SPECIAL and use rq->cmd[0] with the range of driver
- * private REQ_LB opcodes to differentiate what type of request this is
- */
- REQ_TYPE_ATA_TASKFILE,
- REQ_TYPE_ATA_PC,
+ REQ_TYPE_DRV_PRIV, /* driver defined types from here */
};
#define BLK_MAX_CDB 16
@@ -108,7 +96,7 @@ struct request {
struct blk_mq_ctx *mq_ctx;
u64 cmd_flags;
- enum rq_cmd_type_bits cmd_type;
+ unsigned cmd_type;
unsigned long atomic_flags;
int cpu;
@@ -216,19 +204,6 @@ static inline unsigned short req_get_ioprio(struct request *req)
return req->ioprio;
}
-/*
- * State information carried for REQ_TYPE_PM_SUSPEND and REQ_TYPE_PM_RESUME
- * requests. Some step values could eventually be made generic.
- */
-struct request_pm_state
-{
- /* PM state machine step value, currently driver specific */
- int pm_step;
- /* requested PM state value (S1, S2, S3, S4, ...) */
- u32 pm_state;
- void* data; /* for driver use */
-};
-
#include <linux/elevator.h>
struct blk_queue_ctx;
@@ -469,7 +444,7 @@ struct request_queue {
struct mutex sysfs_lock;
int bypass_depth;
- int mq_freeze_depth;
+ atomic_t mq_freeze_depth;
#if defined(CONFIG_BLK_DEV_BSG)
bsg_job_fn *bsg_job_fn;
@@ -610,10 +585,6 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
(((rq)->cmd_flags & REQ_STARTED) && \
((rq)->cmd_type == REQ_TYPE_FS))
-#define blk_pm_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_bidi_rq(rq) ((rq)->next_rq != NULL)
/* rq->queuelist of dequeued request must be list_empty() */
@@ -804,11 +775,7 @@ extern void blk_add_request_payload(struct request *rq, struct page *page,
unsigned int len);
extern int blk_rq_check_limits(struct request_queue *q, struct request *rq);
extern int blk_lld_busy(struct request_queue *q);
-extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
- struct bio_set *bs, gfp_t gfp_mask,
- int (*bio_ctr)(struct bio *, struct bio *, void *),
- void *data);
-extern void blk_rq_unprep_clone(struct request *rq);
+extern void blk_rq_prep_clone(struct request *rq, struct request *rq_src);
extern int blk_insert_cloned_request(struct request_queue *q,
struct request *rq);
extern void blk_delay_queue(struct request_queue *, unsigned long);
@@ -845,6 +812,7 @@ extern void blk_stop_queue(struct request_queue *q);
extern void blk_sync_queue(struct request_queue *q);
extern void __blk_stop_queue(struct request_queue *q);
extern void __blk_run_queue(struct request_queue *q);
+extern void __blk_run_queue_uncond(struct request_queue *q);
extern void blk_run_queue(struct request_queue *);
extern void blk_run_queue_async(struct request_queue *q);
extern int blk_rq_map_user(struct request_queue *, struct request *,
@@ -933,7 +901,7 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq)
if (unlikely(rq->cmd_type == REQ_TYPE_BLOCK_PC))
return q->limits.max_hw_sectors;
- if (!q->limits.chunk_sectors)
+ if (!q->limits.chunk_sectors || (rq->cmd_flags & REQ_DISCARD))
return blk_queue_get_max_sectors(q, rq->cmd_flags);
return min(blk_max_size_offset(q, blk_rq_pos(rq)),
@@ -1054,6 +1022,7 @@ bool __must_check blk_get_queue(struct request_queue *);
struct request_queue *blk_alloc_queue(gfp_t);
struct request_queue *blk_alloc_queue_node(gfp_t, int);
extern void blk_put_queue(struct request_queue *);
+extern void blk_set_queue_dying(struct request_queue *);
/*
* block layer runtime pm functions