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 /* 11 * This is a slightly modified SCSI sense "descriptor" format header. 12 * The addition is to allow the 0x70 and 0x71 response codes. The idea 13 * is to place the salient data from either "fixed" or "descriptor" sense 14 * format into one structure to ease application processing. 15 * 16 * The original sense buffer should be kept around for those cases 17 * in which more information is required (e.g. the LBA of a MEDIUM ERROR). 18 */ 19 struct scsi_sense_hdr { /* See SPC-3 section 4.5 */ 20 u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ 21 u8 sense_key; 22 u8 asc; 23 u8 ascq; 24 u8 byte4; 25 u8 byte5; 26 u8 byte6; 27 u8 additional_length; /* always 0 for fixed sense format */ 28 }; 29 30 static inline bool scsi_sense_valid(const struct scsi_sense_hdr *sshdr) 31 { 32 if (!sshdr) 33 return false; 34 35 return (sshdr->response_code & 0x70) == 0x70; 36 } 37 38 39 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, 40 struct list_head *done_q); 41 extern void scsi_eh_flush_done_q(struct list_head *done_q); 42 extern void scsi_report_bus_reset(struct Scsi_Host *, int); 43 extern void scsi_report_device_reset(struct Scsi_Host *, int, int); 44 extern int scsi_block_when_processing_errors(struct scsi_device *); 45 extern bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len, 46 struct scsi_sense_hdr *sshdr); 47 extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd, 48 struct scsi_sense_hdr *sshdr); 49 50 static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr) 51 { 52 return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1)); 53 } 54 55 extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, 56 int desc_type); 57 58 extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, 59 u64 * info_out); 60 61 extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq); 62 63 extern int scsi_ioctl_reset(struct scsi_device *, int __user *); 64 65 struct scsi_eh_save { 66 /* saved state */ 67 int result; 68 enum dma_data_direction data_direction; 69 unsigned underflow; 70 unsigned char cmd_len; 71 unsigned char prot_op; 72 unsigned char *cmnd; 73 struct scsi_data_buffer sdb; 74 struct request *next_rq; 75 /* new command support */ 76 unsigned char eh_cmnd[BLK_MAX_CDB]; 77 struct scatterlist sense_sgl; 78 }; 79 80 extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, 81 struct scsi_eh_save *ses, unsigned char *cmnd, 82 int cmnd_size, unsigned sense_bytes); 83 84 extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, 85 struct scsi_eh_save *ses); 86 87 #endif /* _SCSI_SCSI_EH_H */ 88