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authorMike Christie <michaelc@cs.wisc.edu>2011-07-31 22:05:09 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-07-31 22:05:09 +0200
commitaa387cc895672b00f807ad7c734a2defaf677712 (patch)
tree31c2c3f3e0d58ff2524cdf8f94abecc394f5eb49 /include/linux/blkdev.h
parent24c3047095fa3954f114bfff2e37b8fcbb216396 (diff)
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.h4
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