include/scsi/scsi_eh.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _SCSI_SCSI_EH_H
0003 #define _SCSI_SCSI_EH_H
0004
0005 #include <linux/scatterlist.h>
0006
0007 #include <scsi/scsi_cmnd.h>
0008 #include <scsi/scsi_common.h>
0009 struct scsi_device;
0010 struct Scsi_Host;
0011
0012 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
0013                    struct list_head *done_q);
0014 extern void scsi_eh_flush_done_q(struct list_head *done_q);
0015 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
0016 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
0017 extern int scsi_block_when_processing_errors(struct scsi_device *);
0018 extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
0019                      struct scsi_sense_hdr *sshdr);
0020 extern enum scsi_disposition scsi_check_sense(struct scsi_cmnd *);
0021
0022 static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr)
0023 {
0024     return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
0025 }
0026
0027 extern bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len,
0028                     u64 *info_out);
0029
0030 extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
0031
0032 struct scsi_eh_save {
0033     /* saved state */
0034     int result;
0035     unsigned int resid_len;
0036     int eh_eflags;
0037     enum dma_data_direction data_direction;
0038     unsigned underflow;
0039     unsigned char cmd_len;
0040     unsigned char prot_op;
0041     unsigned char cmnd[32];
0042     struct scsi_data_buffer sdb;
0043     struct scatterlist sense_sgl;
0044 };
0045
0046 extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
0047         struct scsi_eh_save *ses, unsigned char *cmnd,
0048         int cmnd_size, unsigned sense_bytes);
0049
0050 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
0051         struct scsi_eh_save *ses);
0052
0053 #endif /* _SCSI_SCSI_EH_H */