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 
scsi_sense_is_deferred(const struct scsi_sense_hdr * sshdr)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 	unsigned int resid_len;
36 	int eh_eflags;
37 	enum dma_data_direction data_direction;
38 	unsigned underflow;
39 	unsigned char cmd_len;
40 	unsigned char prot_op;
41 	unsigned char *cmnd;
42 	struct scsi_data_buffer sdb;
43 	struct request *next_rq;
44 	/* new command support */
45 	unsigned char eh_cmnd[BLK_MAX_CDB];
46 	struct scatterlist sense_sgl;
47 };
48 
49 extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
50 		struct scsi_eh_save *ses, unsigned char *cmnd,
51 		int cmnd_size, unsigned sense_bytes);
52 
53 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
54 		struct scsi_eh_save *ses);
55 
56 #endif /* _SCSI_SCSI_EH_H */
57