From 82ed4db499b8598f16f8871261bff088d6b0597f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig <hch@lst.de> Date: Fri, 27 Jan 2017 09:46:29 +0100 Subject: 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> --- include/scsi/scsi_request.h | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 include/scsi/scsi_request.h (limited to 'include/scsi/scsi_request.h') diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h new file mode 100644 index 000000000000..ba0aeb980f7e --- /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 */ -- cgit v1.2.3-58-ga151