#ifndef _SCSI_SCSI_EH_H #define _SCSI_SCSI_EH_H #include <linux/scatterlist.h> #include <scsi/scsi_cmnd.h> struct scsi_device; struct Scsi_Host; /* * This is a slightly modified SCSI sense "descriptor" format header. * The addition is to allow the 0x70 and 0x71 response codes. The idea * is to place the salient data from either "fixed" or "descriptor" sense * format into one structure to ease application processing. * * The original sense buffer should be kept around for those cases * in which more information is required (e.g. the LBA of a MEDIUM ERROR). */ struct scsi_sense_hdr { /* See SPC-3 section 4.5 */ u8 response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ u8 sense_key; u8 asc; u8 ascq; u8 byte4; u8 byte5; u8 byte6; u8 additional_length; /* always 0 for fixed sense format */ }; static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr) { if (!sshdr) return 0; return (sshdr->response_code & 0x70) == 0x70; } extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, struct list_head *done_q); extern void scsi_eh_flush_done_q(struct list_head *done_q); extern void scsi_report_bus_reset(struct Scsi_Host *, int); extern void scsi_report_device_reset(struct Scsi_Host *, int, int); extern int scsi_block_when_processing_errors(struct scsi_device *); extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len, struct scsi_sense_hdr *sshdr); extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd, struct scsi_sense_hdr *sshdr); static inline int scsi_sense_is_deferred(struct scsi_sense_hdr *sshdr) { return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1)); } extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, int desc_type); extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, u64 * info_out); /* * Reset request from external source */ #define SCSI_TRY_RESET_DEVICE 1 #define SCSI_TRY_RESET_BUS 2 #define SCSI_TRY_RESET_HOST 3 extern int scsi_reset_provider(struct scsi_device *, int); struct scsi_eh_save { /* saved state */ int result; enum dma_data_direction data_direction; unsigned char cmd_len; unsigned char cmnd[MAX_COMMAND_SIZE]; struct scsi_data_buffer sdb; struct request *next_rq; /* new command support */ struct scatterlist sense_sgl; }; extern void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses, unsigned char *cmnd, int cmnd_size, unsigned sense_bytes); extern void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, struct scsi_eh_save *ses); #endif /* _SCSI_SCSI_EH_H */