include/scsi/scsi_eh.h

   1 #ifndef _SCSI_SCSI_EH_H
   2 #define _SCSI_SCSI_EH_H
   3
   4 #include <linux/scatterlist.h>
   5
   6 #include <scsi/scsi_cmnd.h>
   7 #include <scsi/scsi_common.h>
   8 struct scsi_device;
   9 struct Scsi_Host;
  10
  11 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
  12                                struct list_head *done_q);
  13 extern void scsi_eh_flush_done_q(struct list_head *done_q);
  14 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
  15 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
  16 extern int scsi_block_when_processing_errors(struct scsi_device *);
  17 extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
  18                                          struct scsi_sense_hdr *sshdr);
  19 extern int scsi_check_sense(struct scsi_cmnd *);
  20
  21 static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr)
  22 {
  23         return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
  24 }
  25
  26 extern bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len,
  27                                     u64 *info_out);
  28
  29 extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
  30
  31 struct scsi_eh_save {
  32         /* saved state */
  33         int result;
  34         int eh_eflags;
  35         enum dma_data_direction data_direction;
  36         unsigned underflow;
  37         unsigned char cmd_len;
  38         unsigned char prot_op;
  39         unsigned char *cmnd;
  40         struct scsi_data_buffer sdb;
  41         struct request *next_rq;
  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 */