fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / scsi / scsi_eh.h
blob44224ba4dd9065cb89d93a10aa1c7daf95b2f6bd
1 #ifndef _SCSI_SCSI_EH_H
2 #define _SCSI_SCSI_EH_H
4 #include <scsi/scsi_cmnd.h>
5 struct scsi_device;
6 struct Scsi_Host;
8 /*
9 * This is a slightly modified SCSI sense "descriptor" format header.
10 * The addition is to allow the 0x70 and 0x71 response codes. The idea
11 * is to place the salient data from either "fixed" or "descriptor" sense
12 * format into one structure to ease application processing.
14 * The original sense buffer should be kept around for those cases
15 * in which more information is required (e.g. the LBA of a MEDIUM ERROR).
17 struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
18 u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
19 u8 sense_key;
20 u8 asc;
21 u8 ascq;
22 u8 byte4;
23 u8 byte5;
24 u8 byte6;
25 u8 additional_length; /* always 0 for fixed sense format */
28 static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
30 if (!sshdr)
31 return 0;
33 return (sshdr->response_code & 0x70) == 0x70;
37 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
38 struct list_head *done_q);
39 extern void scsi_eh_flush_done_q(struct list_head *done_q);
40 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
41 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
42 extern int scsi_block_when_processing_errors(struct scsi_device *);
43 extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
44 struct scsi_sense_hdr *sshdr);
45 extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
46 struct scsi_sense_hdr *sshdr);
48 static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr)
50 return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
53 extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
54 int desc_type);
56 extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
57 u64 * info_out);
60 * Reset request from external source
62 #define SCSI_TRY_RESET_DEVICE 1
63 #define SCSI_TRY_RESET_BUS 2
64 #define SCSI_TRY_RESET_HOST 3
66 extern int scsi_reset_provider(struct scsi_device *, int);
68 struct scsi_eh_save {
69 int result;
70 enum dma_data_direction data_direction;
71 unsigned char cmd_len;
72 unsigned char cmnd[MAX_COMMAND_SIZE];
74 void *buffer;
75 unsigned bufflen;
76 unsigned short use_sg;
77 int resid;
79 struct scatterlist sense_sgl;
82 extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd,
83 struct scsi_eh_save *ses, unsigned char *cmnd,
84 int cmnd_size, unsigned sense_bytes);
86 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd,
87 struct scsi_eh_save *ses);
89 #endif /* _SCSI_SCSI_EH_H */