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>
 9struct scsi_device;
10struct Scsi_Host;
11
12extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
13			       struct list_head *done_q);
14extern void scsi_eh_flush_done_q(struct list_head *done_q);
15extern void scsi_report_bus_reset(struct Scsi_Host *, int);
16extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
17extern int scsi_block_when_processing_errors(struct scsi_device *);
18extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
19					 struct scsi_sense_hdr *sshdr);
20extern enum scsi_disposition scsi_check_sense(struct scsi_cmnd *);
21
22static 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
27extern bool scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len,
28				    u64 *info_out);
29
30extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
31
32struct 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[32];
42	struct scsi_data_buffer sdb;
43	struct scatterlist sense_sgl;
44
45	/* struct request fields */
46#ifdef CONFIG_BLK_INLINE_ENCRYPTION
47	struct bio_crypt_ctx *rq_crypt_ctx;
48	struct blk_crypto_keyslot *rq_crypt_keyslot;
49#endif
50};
51
52extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
53		struct scsi_eh_save *ses, unsigned char *cmnd,
54		int cmnd_size, unsigned sense_bytes);
55
56extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
57		struct scsi_eh_save *ses);
58
59#endif /* _SCSI_SCSI_EH_H */