e1c234685c
- Drivers/transports that want to send a synchronous REQUEST_SENSE command as part of their .queuecommand sequence, have 2 new API's that facilitate in doing so and abstract them from scsi-ml internals. void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *sesci, unsigned char *cmnd, int cmnd_size, int sense_bytes) Will hijack a command and prepare it for request sense if needed. And will save any later needed info into a scsi_eh_save structure. void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, struct scsi_eh_save *sesci); Will undo any changes done to a command by above function. Making it ready for completion. - Re-factor scsi_send_eh_cmnd() to use above APIs Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
#ifndef _SCSI_SCSI_EH_H
|
|
#define _SCSI_SCSI_EH_H
|
|
|
|
#include <scsi/scsi_cmnd.h>
|
|
struct scsi_device;
|
|
struct Scsi_Host;
|
|
|
|
/*
|
|
* This is a slightly modified SCSI sense "descriptor" format header.
|
|
* The addition is to allow the 0x70 and 0x71 response codes. The idea
|
|
* is to place the salient data from either "fixed" or "descriptor" sense
|
|
* format into one structure to ease application processing.
|
|
*
|
|
* The original sense buffer should be kept around for those cases
|
|
* in which more information is required (e.g. the LBA of a MEDIUM ERROR).
|
|
*/
|
|
struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
|
|
u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
|
|
u8 sense_key;
|
|
u8 asc;
|
|
u8 ascq;
|
|
u8 byte4;
|
|
u8 byte5;
|
|
u8 byte6;
|
|
u8 additional_length; /* always 0 for fixed sense format */
|
|
};
|
|
|
|
static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
|
|
{
|
|
if (!sshdr)
|
|
return 0;
|
|
|
|
return (sshdr->response_code & 0x70) == 0x70;
|
|
}
|
|
|
|
|
|
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 int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
|
|
struct scsi_sense_hdr *sshdr);
|
|
extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
|
|
struct scsi_sense_hdr *sshdr);
|
|
|
|
static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr)
|
|
{
|
|
return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
|
|
}
|
|
|
|
extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
|
|
int desc_type);
|
|
|
|
extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
|
|
u64 * info_out);
|
|
|
|
/*
|
|
* Reset request from external source
|
|
*/
|
|
#define SCSI_TRY_RESET_DEVICE 1
|
|
#define SCSI_TRY_RESET_BUS 2
|
|
#define SCSI_TRY_RESET_HOST 3
|
|
|
|
extern int scsi_reset_provider(struct scsi_device *, int);
|
|
|
|
struct scsi_eh_save {
|
|
int result;
|
|
enum dma_data_direction data_direction;
|
|
unsigned char cmd_len;
|
|
unsigned char cmnd[MAX_COMMAND_SIZE];
|
|
|
|
void *buffer;
|
|
unsigned bufflen;
|
|
unsigned short use_sg;
|
|
int resid;
|
|
|
|
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 */
|