include/scsi/scsi_eh.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _SCSI_SCSI_EH_H
   3 #define _SCSI_SCSI_EH_H
   4
   5 #include <linux/scatterlist.h>
   6
   7 #include <scsi/scsi_cmnd.h>
   8 #include <scsi/scsi_common.h>
   9 struct scsi_device;
  10 struct Scsi_Host;
  11
  12 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
  13                                struct list_head *done_q);
  14 extern void scsi_eh_flush_done_q(struct list_head *done_q);
  15 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
  16 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
  17 extern int scsi_block_when_processing_errors(struct scsi_device *);
  18 extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
  19                                          struct scsi_sense_hdr *sshdr);
  20 extern int scsi_check_sense(struct scsi_cmnd *);
  21
  22 static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr)
  23 {
  24         return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
  25 }
  26
  27 extern bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len,
  28                                     u64 *info_out);
  29
  30 extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
  31
  32 struct scsi_eh_save {
  33         /* saved state */
  34         int result;
  35         int eh_eflags;
  36         enum dma_data_direction data_direction;
  37         unsigned underflow;
  38         unsigned char cmd_len;
  39         unsigned char prot_op;
  40         unsigned char *cmnd;
  41         struct scsi_data_buffer sdb;
  42         /* new command support */
  43         unsigned char eh_cmnd[BLK_MAX_CDB];
  44         struct scatterlist sense_sgl;
  45 };
  46
  47 extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
  48                 struct scsi_eh_save *ses, unsigned char *cmnd,
  49                 int cmnd_size, unsigned sense_bytes);
  50
  51 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
  52                 struct scsi_eh_save *ses);
  53
  54 #endif /* _SCSI_SCSI_EH_H */