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| author | Christoph Hellwig <hch@lst.de> | 2017-01-27 09:46:29 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-27 15:08:35 -0700 |
| commit | 82ed4db499b8598f16f8871261bff088d6b0597f (patch) | |
| tree | e1cc0a433bf5ae2b9723837291617bdfeeb61816 /include/scsi/scsi_request.h | |
| parent | 8ae94eb65be9425af4d57a4f4cfebfdf03081e93 (diff) | |
| download | op-kernel-dev-82ed4db499b8598f16f8871261bff088d6b0597f.zip op-kernel-dev-82ed4db499b8598f16f8871261bff088d6b0597f.tar.gz | |
block: split scsi_request out of struct request
And require all drivers that want to support BLOCK_PC to allocate it
as the first thing of their private data. To support this the legacy
IDE and BSG code is switched to set cmd_size on their queues to let
the block layer allocate the additional space.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/scsi/scsi_request.h')
| -rw-r--r-- | include/scsi/scsi_request.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h new file mode 100644 index 0000000..ba0aeb9 --- /dev/null +++ b/include/scsi/scsi_request.h @@ -0,0 +1,30 @@ +#ifndef _SCSI_SCSI_REQUEST_H +#define _SCSI_SCSI_REQUEST_H + +#include <linux/blk-mq.h> + +#define BLK_MAX_CDB 16 + +struct scsi_request { + unsigned char __cmd[BLK_MAX_CDB]; + unsigned char *cmd; + unsigned short cmd_len; + unsigned int sense_len; + unsigned int resid_len; /* residual count */ + void *sense; +}; + +static inline struct scsi_request *scsi_req(struct request *rq) +{ + return blk_mq_rq_to_pdu(rq); +} + +static inline void scsi_req_free_cmd(struct scsi_request *req) +{ + if (req->cmd != req->__cmd) + kfree(req->cmd); +} + +void scsi_req_init(struct request *); + +#endif /* _SCSI_SCSI_REQUEST_H */ |
