forked from luck/tmp_suning_uos_patched
82ed4db499
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>
31 lines
591 B
C
31 lines
591 B
C
#ifndef _SCSI_SCSI_REQUEST_H
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#define _SCSI_SCSI_REQUEST_H
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#include <linux/blk-mq.h>
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#define BLK_MAX_CDB 16
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struct scsi_request {
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unsigned char __cmd[BLK_MAX_CDB];
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unsigned char *cmd;
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unsigned short cmd_len;
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unsigned int sense_len;
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unsigned int resid_len; /* residual count */
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void *sense;
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};
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static inline struct scsi_request *scsi_req(struct request *rq)
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{
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return blk_mq_rq_to_pdu(rq);
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}
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static inline void scsi_req_free_cmd(struct scsi_request *req)
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{
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if (req->cmd != req->__cmd)
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kfree(req->cmd);
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}
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void scsi_req_init(struct request *);
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#endif /* _SCSI_SCSI_REQUEST_H */
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