From 4f8c9510ba71bb54477841bebb90154ef140860f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 17 Apr 2015 22:37:16 +0200 Subject: block: rename REQ_TYPE_SPECIAL to REQ_TYPE_DRV_PRIV Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 7f9a516f24de..98c90272443b 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -79,10 +79,10 @@ enum rq_cmd_type_bits { REQ_TYPE_PM_SUSPEND, /* suspend request */ REQ_TYPE_PM_RESUME, /* resume request */ REQ_TYPE_PM_SHUTDOWN, /* shutdown request */ - REQ_TYPE_SPECIAL, /* driver defined type */ + REQ_TYPE_DRV_PRIV, /* 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 + * use REQ_TYPE_DRV_PRIV 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, -- cgit v1.2.3 From b42171ef7d938a66fa52e66a3d911ed63770b5ca Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 17 Apr 2015 22:37:17 +0200 Subject: block: move REQ_TYPE_ATA_TASKFILE and REQ_TYPE_ATA_PC to ide.h These values are only used by the IDE driver, so move them into it by allowing drivers to take cmd_type values after the first private one. Note that we have to turn cmd_type into a plain unsigned integer so that gcc doesn't complain about mismatching enum types. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 98c90272443b..9cb4d80a4987 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -79,14 +79,7 @@ enum rq_cmd_type_bits { REQ_TYPE_PM_SUSPEND, /* suspend request */ REQ_TYPE_PM_RESUME, /* resume request */ REQ_TYPE_PM_SHUTDOWN, /* shutdown request */ - REQ_TYPE_DRV_PRIV, /* driver defined type */ - /* - * for ATA/ATAPI devices. this really doesn't belong here, ide should - * use REQ_TYPE_DRV_PRIV 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 +101,7 @@ 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; -- cgit v1.2.3 From b0b93b48a30e809240ddd7449a6ad60a5ddf7b4d Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 17 Apr 2015 22:37:18 +0200 Subject: block: move REQ_TYPE_SENSE to the ide driver Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 9cb4d80a4987..6076b9e18dcb 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -75,7 +75,6 @@ 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 */ -- cgit v1.2.3 From ac7cdff00a33d48d27217560fa3b16d802e5f535 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 17 Apr 2015 22:37:19 +0200 Subject: block: remove REQ_TYPE_PM_SHUTDOWN Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 6076b9e18dcb..c2829ba5e738 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -77,7 +77,6 @@ enum rq_cmd_type_bits { REQ_TYPE_BLOCK_PC, /* scsi command */ REQ_TYPE_PM_SUSPEND, /* suspend request */ REQ_TYPE_PM_RESUME, /* resume request */ - REQ_TYPE_PM_SHUTDOWN, /* shutdown request */ REQ_TYPE_DRV_PRIV, /* driver defined types from here */ }; -- cgit v1.2.3 From a7928c1578c550bd6f4dec62d65132e6db226c57 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 17 Apr 2015 22:37:20 +0200 Subject: block: move PM request support to IDE This removes the request types and hacks from the block code and into the old IDE driver. There is a small amunt of code duplication due to this, but it's not too bad. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 21 +-------------------- 1 file changed, 1 insertion(+), 20 deletions(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index c2829ba5e738..2da818a48097 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; @@ -75,8 +74,6 @@ struct request_list { enum rq_cmd_type_bits { REQ_TYPE_FS = 1, /* fs request */ REQ_TYPE_BLOCK_PC, /* scsi command */ - REQ_TYPE_PM_SUSPEND, /* suspend request */ - REQ_TYPE_PM_RESUME, /* resume request */ REQ_TYPE_DRV_PRIV, /* driver defined types from here */ }; @@ -207,19 +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 struct blk_queue_ctx; @@ -601,10 +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() */ @@ -838,6 +818,7 @@ 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 *, -- cgit v1.2.3 From 4ecd4fef3a074c8bb43c391a57742c422469ebbd Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 7 May 2015 09:38:13 +0200 Subject: block: use an atomic_t for mq_freeze_depth lockdep gets unhappy about the not disabling irqs when using the queue_lock around it. Instead of trying to fix that up just switch to an atomic_t and get rid of the lock. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 2da818a48097..bc917956a6d0 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -444,7 +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; -- cgit v1.2.3 From 5f1b670d0bef508a5554d92525f5f6d00d640b38 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 22 May 2015 09:14:04 -0400 Subject: block, dm: don't copy bios for request clones Currently dm-multipath has to clone the bios for every request sent to the lower devices, which wastes cpu cycles and ties down memory. This patch instead adds a new REQ_CLONE flag that instructs req_bio_endio to not complete bios attached to a request, which we set on clone requests similar to bios in a flush sequence. With this change I/O errors on a path failure only get propagated to dm-multipath, which can then either resubmit the I/O or complete the bios on the original request. I've done some basic testing of this on a Linux target with ALUA support, and it survives path failures during I/O nicely. Signed-off-by: Christoph Hellwig Signed-off-by: Mike Snitzer Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index bc917956a6d0..9ded80da2c16 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -775,11 +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); -- cgit v1.2.3