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| author | Mike Christie <michaelc@cs.wisc.edu> | 2011-07-31 22:05:09 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-07-31 22:05:09 +0200 |
| commit | aa387cc895672b00f807ad7c734a2defaf677712 (patch) | |
| tree | 31c2c3f3e0d58ff2524cdf8f94abecc394f5eb49 /include/linux/blkdev.h | |
| parent | 24c3047095fa3954f114bfff2e37b8fcbb216396 (diff) | |
| download | lwn-aa387cc895672b00f807ad7c734a2defaf677712.tar.gz lwn-aa387cc895672b00f807ad7c734a2defaf677712.zip | |
block: add bsg helper library
This moves the FC classes bsg code to the block layer and
makes it a lib so that other classes like iscsi and SAS can use it.
It is helpful because working with the request queue, bios,
creating scatterlists, etc are a pain that the LLD does not
have to worry about with normal IOs and should not have to
worry about for bsg requests.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 0e67c45b3bc9..847928546076 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -30,6 +30,7 @@ struct request_pm_state; struct blk_trace; struct request; struct sg_io_hdr; +struct bsg_job; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 /* Default maximum */ @@ -209,6 +210,7 @@ typedef int (merge_bvec_fn) (struct request_queue *, struct bvec_merge_data *, typedef void (softirq_done_fn)(struct request *); typedef int (dma_drain_needed_fn)(struct request *); typedef int (lld_busy_fn) (struct request_queue *q); +typedef int (bsg_job_fn) (struct bsg_job *); enum blk_eh_timer_return { BLK_EH_NOT_HANDLED, @@ -375,6 +377,8 @@ struct request_queue { struct mutex sysfs_lock; #if defined(CONFIG_BLK_DEV_BSG) + bsg_job_fn *bsg_job_fn; + int bsg_job_size; struct bsg_class_device bsg_dev; #endif |