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Linux Kernel
3.7.1
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Linux Kernel
3.7.1
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Go to the source code of this file.
Data Structures | |
| struct | scsi_sense_hdr |
| struct | scsi_eh_save |
Macros | |
| #define | SCSI_TRY_RESET_DEVICE 1 |
| #define | SCSI_TRY_RESET_BUS 2 |
| #define | SCSI_TRY_RESET_HOST 3 |
| #define | SCSI_TRY_RESET_TARGET 4 |
Functions | |
| void | scsi_eh_finish_cmd (struct scsi_cmnd *scmd, struct list_head *done_q) |
| void | scsi_eh_flush_done_q (struct list_head *done_q) |
| void | scsi_report_bus_reset (struct Scsi_Host *, int) |
| void | scsi_report_device_reset (struct Scsi_Host *, int, int) |
| int | scsi_block_when_processing_errors (struct scsi_device *) |
| int | scsi_normalize_sense (const u8 *sense_buffer, int sb_len, struct scsi_sense_hdr *sshdr) |
| int | scsi_command_normalize_sense (struct scsi_cmnd *cmd, struct scsi_sense_hdr *sshdr) |
| const u8 * | scsi_sense_desc_find (const u8 *sense_buffer, int sb_len, int desc_type) |
| int | scsi_get_sense_info_fld (const u8 *sense_buffer, int sb_len, u64 *info_out) |
| void | scsi_build_sense_buffer (int desc, u8 *buf, u8 key, u8 asc, u8 ascq) |
| int | scsi_reset_provider (struct scsi_device *, int) |
| void | scsi_eh_prep_cmnd (struct scsi_cmnd *scmd, struct scsi_eh_save *ses, unsigned char *cmnd, int cmnd_size, unsigned sense_bytes) |
| void | scsi_eh_restore_cmnd (struct scsi_cmnd *scmd, struct scsi_eh_save *ses) |
| int scsi_block_when_processing_errors | ( | struct scsi_device * | sdev | ) |
scsi_block_when_processing_errors - Prevent cmds from being queued. : Device on which we are performing recovery.
Description: We block until the host is out of error recovery, and then check to see whether the host or the device is offline.
Return value: 0 when dev was taken offline by error recovery. 1 OK to proceed.
Definition at line 167 of file scsi_error.c.
scsi_build_sense_buffer - build sense data in a buffer : Sense format (non zero == descriptor format, 0 == fixed format) : Where to build sense data : Sense key : Additional sense code : Additional sense code qualifier
Definition at line 2215 of file scsi_error.c.
| int scsi_command_normalize_sense | ( | struct scsi_cmnd * | cmd, |
| struct scsi_sense_hdr * | sshdr | ||
| ) |
Definition at line 2108 of file scsi_error.c.
scsi_eh_finish_cmd - Handle a cmd that eh is finished with. : Original SCSI cmd that eh has finished. : Queue for processed commands.
Notes: We don't want to use the normal command completion while we are are still handling errors - it may cause other commands to be queued, and that would disturb what we are doing. Thus we really want to keep a list of pending commands for final completion, and once we are ready to leave error handling we handle completion for real.
Definition at line 882 of file scsi_error.c.
scsi_eh_flush_done_q - finish processed commands or retry them. : list_head of processed commands.
Definition at line 1742 of file scsi_error.c.
| void scsi_eh_prep_cmnd | ( | struct scsi_cmnd * | scmd, |
| struct scsi_eh_save * | ses, | ||
| unsigned char * | cmnd, | ||
| int | cmnd_size, | ||
| unsigned | sense_bytes | ||
| ) |
scsi_eh_prep_cmnd - Save a scsi command info as part of error recovery : SCSI command structure to hijack : structure to save restore information : CDB to send. Can be NULL if no new cmnd is needed : size in bytes of (must be <= BLK_MAX_CDB) : size of sense data to copy. or 0 (if != 0 is ignored)
This function is used to save a scsi command information before re-execution as part of the error recovery process. If is 0 the command sent must be one that does not transfer any data. If != 0 is ignored and this functions sets up a REQUEST_SENSE command and cmnd buffers to read into ->sense_buffer.
Definition at line 690 of file scsi_error.c.
| void scsi_eh_restore_cmnd | ( | struct scsi_cmnd * | scmd, |
| struct scsi_eh_save * | ses | ||
| ) |
scsi_eh_restore_cmnd - Restore a scsi command info as part of error recovery : SCSI command structure to restore : saved information from a coresponding call to scsi_eh_prep_cmnd
Undo any damage done by above scsi_eh_prep_cmnd().
Definition at line 758 of file scsi_error.c.
scsi_get_sense_info_fld - get information field from sense data (either fixed or descriptor format) : byte array of sense data : number of valid bytes in sense_buffer : pointer to 64 integer where 8 or 4 byte information field will be placed if found.
Return value: 1 if information field found, 0 if not found.
Definition at line 2165 of file scsi_error.c.
scsi_normalize_sense - normalize main elements from either fixed or descriptor sense data format into a common format.
: byte array containing sense data returned by device : number of valid bytes in sense_buffer : pointer to instance of structure that common elements are written to.
Notes: The "main elements" from sense data are: response_code, sense_key, asc, ascq and additional_length (only for descriptor format).
Typically this function can be called after a device has responded to a SCSI command with the CHECK_CONDITION status.
Return value: 1 if valid sense data information found, else 0;
Definition at line 2063 of file scsi_error.c.
Definition at line 1907 of file scsi_error.c.
Definition at line 1940 of file scsi_error.c.
| int scsi_reset_provider | ( | struct scsi_device * | , |
| int | |||
| ) |
Definition at line 1971 of file scsi_error.c.
scsi_sense_desc_find - search for a given descriptor type in descriptor sense data format. : byte array of descriptor format sense data : number of valid bytes in sense_buffer : value of descriptor type to find (e.g. 0 -> information)
Notes: only valid when sense data is in descriptor format
Return value: pointer to start of (first) descriptor if found else NULL
Definition at line 2129 of file scsi_error.c.
1.8.2