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 struct scsi_device;
   8 struct Scsi_Host;
   9
  10 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
  11                                struct list_head *done_q);
  12 extern void scsi_eh_flush_done_q(struct list_head *done_q);
  13 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
  14 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
  15 extern int scsi_block_when_processing_errors(struct scsi_device *);
  16 extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
  17                                          struct scsi_sense_hdr *sshdr);
  18
  19 static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr)
  20 {
  21         return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
  22 }
  23
  24 extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
  25                                        int desc_type);
  26
  27 extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
  28                                    u64 * info_out);
  29
  30 extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq);
  31 extern void scsi_set_sense_information(u8 *buf, u64 info);
  32
  33 extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
  34
  35 struct scsi_eh_save {
  36         /* saved state */
  37         int result;
  38         enum dma_data_direction data_direction;
  39         unsigned underflow;
  40         unsigned char cmd_len;
  41         unsigned char prot_op;
  42         unsigned char *cmnd;
  43         struct scsi_data_buffer sdb;
  44         struct request *next_rq;
  45         /* new command support */
  46         unsigned char eh_cmnd[BLK_MAX_CDB];
  47         struct scatterlist sense_sgl;
  48 };
  49
  50 extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
  51                 struct scsi_eh_save *ses, unsigned char *cmnd,
  52                 int cmnd_size, unsigned sense_bytes);
  53
  54 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
  55                 struct scsi_eh_save *ses);
  56
  57 #endif /* _SCSI_SCSI_EH_H */