forked from Minki/linux
ce70fd9a55
Now that each scsi_request is backed by a scsi_cmnd, there is no need to indirect the CDB storage. Change all submitters of SCSI passthrough requests to store the CDB information directly in the scsi_cmnd, and while doing so allocate the full 32 bytes that cover all Linux supported SCSI hosts instead of requiring dynamic allocation for > 16 byte CDBs. On 64-bit systems this does not change the size of the scsi_cmnd at all, while on 32-bit systems it slightly increases it for now, but that increase will be made up by the removal of the remaining scsi_request fields. Link: https://lore.kernel.org/r/20220224175552.988286-4-hch@lst.de Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: John Garry <john.garry@huawei.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _SCSI_SCSI_EH_H
|
|
#define _SCSI_SCSI_EH_H
|
|
|
|
#include <linux/scatterlist.h>
|
|
|
|
#include <scsi/scsi_cmnd.h>
|
|
#include <scsi/scsi_common.h>
|
|
struct scsi_device;
|
|
struct Scsi_Host;
|
|
|
|
extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
|
|
struct list_head *done_q);
|
|
extern void scsi_eh_flush_done_q(struct list_head *done_q);
|
|
extern void scsi_report_bus_reset(struct Scsi_Host *, int);
|
|
extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
|
|
extern int scsi_block_when_processing_errors(struct scsi_device *);
|
|
extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
|
|
struct scsi_sense_hdr *sshdr);
|
|
extern enum scsi_disposition scsi_check_sense(struct scsi_cmnd *);
|
|
|
|
static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr)
|
|
{
|
|
return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
|
|
}
|
|
|
|
extern bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len,
|
|
u64 *info_out);
|
|
|
|
extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
|
|
|
|
struct scsi_eh_save {
|
|
/* saved state */
|
|
int result;
|
|
unsigned int resid_len;
|
|
int eh_eflags;
|
|
enum dma_data_direction data_direction;
|
|
unsigned underflow;
|
|
unsigned char cmd_len;
|
|
unsigned char prot_op;
|
|
unsigned char cmnd[32];
|
|
struct scsi_data_buffer sdb;
|
|
struct scatterlist sense_sgl;
|
|
};
|
|
|
|
extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
|
|
struct scsi_eh_save *ses, unsigned char *cmnd,
|
|
int cmnd_size, unsigned sense_bytes);
|
|
|
|
extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
|
|
struct scsi_eh_save *ses);
|
|
|
|
#endif /* _SCSI_SCSI_EH_H */
|