From e5b5728cd330f533e02e483af8973ad7ffccce8b Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Tue, 22 Aug 2017 07:08:27 +0200 Subject: scsi: move non-emulation specific code to scsi/ MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit util/scsi.c includes some SCSI code that is shared by block/iscsi.c and hw/scsi, but the introduction of the persistent reservation helper will add many more instances of this. There is also include/block/scsi.h, which actually is not part of the core block layer. The persistent reservation manager will also need a home. A scsi/ directory provides one for both the aforementioned shared code and the PR manager code. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Paolo Bonzini --- scsi/Makefile.objs | 1 + scsi/utils.c | 492 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 493 insertions(+) create mode 100644 scsi/Makefile.objs create mode 100644 scsi/utils.c (limited to 'scsi') diff --git a/scsi/Makefile.objs b/scsi/Makefile.objs new file mode 100644 index 0000000000..31b82a5a36 --- /dev/null +++ b/scsi/Makefile.objs @@ -0,0 +1 @@ +block-obj-y += utils.o diff --git a/scsi/utils.c b/scsi/utils.c new file mode 100644 index 0000000000..2327e06da0 --- /dev/null +++ b/scsi/utils.c @@ -0,0 +1,492 @@ +/* + * SCSI helpers + * + * Copyright 2017 Red Hat, Inc. + * + * Authors: + * Fam Zheng + * Paolo Bonzini + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + */ + +#include "qemu/osdep.h" +#include "block/scsi.h" +#include "scsi/utils.h" +#include "qemu/bswap.h" + +uint32_t scsi_data_cdb_xfer(uint8_t *buf) +{ + if ((buf[0] >> 5) == 0 && buf[4] == 0) { + return 256; + } else { + return scsi_cdb_xfer(buf); + } +} + +uint32_t scsi_cdb_xfer(uint8_t *buf) +{ + switch (buf[0] >> 5) { + case 0: + return buf[4]; + break; + case 1: + case 2: + return lduw_be_p(&buf[7]); + break; + case 4: + return ldl_be_p(&buf[10]) & 0xffffffffULL; + break; + case 5: + return ldl_be_p(&buf[6]) & 0xffffffffULL; + break; + default: + return -1; + } +} + +uint64_t scsi_cmd_lba(SCSICommand *cmd) +{ + uint8_t *buf = cmd->buf; + uint64_t lba; + + switch (buf[0] >> 5) { + case 0: + lba = ldl_be_p(&buf[0]) & 0x1fffff; + break; + case 1: + case 2: + case 5: + lba = ldl_be_p(&buf[2]) & 0xffffffffULL; + break; + case 4: + lba = ldq_be_p(&buf[2]); + break; + default: + lba = -1; + + } + return lba; +} + +int scsi_cdb_length(uint8_t *buf) +{ + int cdb_len; + + switch (buf[0] >> 5) { + case 0: + cdb_len = 6; + break; + case 1: + case 2: + cdb_len = 10; + break; + case 4: + cdb_len = 16; + break; + case 5: + cdb_len = 12; + break; + default: + cdb_len = -1; + } + return cdb_len; +} + +/* + * Predefined sense codes + */ + +/* No sense data available */ +const struct SCSISense sense_code_NO_SENSE = { + .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 +}; + +/* LUN not ready, Manual intervention required */ +const struct SCSISense sense_code_LUN_NOT_READY = { + .key = NOT_READY, .asc = 0x04, .ascq = 0x03 +}; + +/* LUN not ready, Medium not present */ +const struct SCSISense sense_code_NO_MEDIUM = { + .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 +}; + +/* LUN not ready, medium removal prevented */ +const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { + .key = NOT_READY, .asc = 0x53, .ascq = 0x02 +}; + +/* Hardware error, internal target failure */ +const struct SCSISense sense_code_TARGET_FAILURE = { + .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 +}; + +/* Illegal request, invalid command operation code */ +const struct SCSISense sense_code_INVALID_OPCODE = { + .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 +}; + +/* Illegal request, LBA out of range */ +const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { + .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 +}; + +/* Illegal request, Invalid field in CDB */ +const struct SCSISense sense_code_INVALID_FIELD = { + .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 +}; + +/* Illegal request, Invalid field in parameter list */ +const struct SCSISense sense_code_INVALID_PARAM = { + .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 +}; + +/* Illegal request, Parameter list length error */ +const struct SCSISense sense_code_INVALID_PARAM_LEN = { + .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 +}; + +/* Illegal request, LUN not supported */ +const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { + .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 +}; + +/* Illegal request, Saving parameters not supported */ +const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { + .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 +}; + +/* Illegal request, Incompatible medium installed */ +const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { + .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 +}; + +/* Illegal request, medium removal prevented */ +const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { + .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 +}; + +/* Illegal request, Invalid Transfer Tag */ +const struct SCSISense sense_code_INVALID_TAG = { + .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 +}; + +/* Command aborted, I/O process terminated */ +const struct SCSISense sense_code_IO_ERROR = { + .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 +}; + +/* Command aborted, I_T Nexus loss occurred */ +const struct SCSISense sense_code_I_T_NEXUS_LOSS = { + .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 +}; + +/* Command aborted, Logical Unit failure */ +const struct SCSISense sense_code_LUN_FAILURE = { + .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 +}; + +/* Command aborted, Overlapped Commands Attempted */ +const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { + .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 +}; + +/* Unit attention, Capacity data has changed */ +const struct SCSISense sense_code_CAPACITY_CHANGED = { + .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 +}; + +/* Unit attention, Power on, reset or bus device reset occurred */ +const struct SCSISense sense_code_RESET = { + .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 +}; + +/* Unit attention, No medium */ +const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { + .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 +}; + +/* Unit attention, Medium may have changed */ +const struct SCSISense sense_code_MEDIUM_CHANGED = { + .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 +}; + +/* Unit attention, Reported LUNs data has changed */ +const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { + .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e +}; + +/* Unit attention, Device internal reset */ +const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { + .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 +}; + +/* Data Protection, Write Protected */ +const struct SCSISense sense_code_WRITE_PROTECTED = { + .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 +}; + +/* Data Protection, Space Allocation Failed Write Protect */ +const struct SCSISense sense_code_SPACE_ALLOC_FAILED = { + .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x07 +}; + +/* + * scsi_convert_sense + * + * Convert between fixed and descriptor sense buffers + */ +int scsi_convert_sense(uint8_t *in_buf, int in_len, + uint8_t *buf, int len, bool fixed) +{ + bool fixed_in; + SCSISense sense; + if (!fixed && len < 8) { + return 0; + } + + if (in_len == 0) { + sense.key = NO_SENSE; + sense.asc = 0; + sense.ascq = 0; + } else { + fixed_in = (in_buf[0] & 2) == 0; + + if (fixed == fixed_in) { + memcpy(buf, in_buf, MIN(len, in_len)); + return MIN(len, in_len); + } + + if (fixed_in) { + sense.key = in_buf[2]; + sense.asc = in_buf[12]; + sense.ascq = in_buf[13]; + } else { + sense.key = in_buf[1]; + sense.asc = in_buf[2]; + sense.ascq = in_buf[3]; + } + } + + memset(buf, 0, len); + if (fixed) { + /* Return fixed format sense buffer */ + buf[0] = 0x70; + buf[2] = sense.key; + buf[7] = 10; + buf[12] = sense.asc; + buf[13] = sense.ascq; + return MIN(len, SCSI_SENSE_LEN); + } else { + /* Return descriptor format sense buffer */ + buf[0] = 0x72; + buf[1] = sense.key; + buf[2] = sense.asc; + buf[3] = sense.ascq; + return 8; + } +} + +int scsi_sense_to_errno(int key, int asc, int ascq) +{ + switch (key) { + case 0x00: /* NO SENSE */ + case 0x01: /* RECOVERED ERROR */ + case 0x06: /* UNIT ATTENTION */ + /* These sense keys are not errors */ + return 0; + case 0x0b: /* COMMAND ABORTED */ + return ECANCELED; + case 0x02: /* NOT READY */ + case 0x05: /* ILLEGAL REQUEST */ + case 0x07: /* DATA PROTECTION */ + /* Parse ASCQ */ + break; + default: + return EIO; + } + switch ((asc << 8) | ascq) { + case 0x1a00: /* PARAMETER LIST LENGTH ERROR */ + case 0x2000: /* INVALID OPERATION CODE */ + case 0x2400: /* INVALID FIELD IN CDB */ + case 0x2600: /* INVALID FIELD IN PARAMETER LIST */ + return EINVAL; + case 0x2100: /* LBA OUT OF RANGE */ + case 0x2707: /* SPACE ALLOC FAILED */ + return ENOSPC; + case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */ + return ENOTSUP; + case 0x3a00: /* MEDIUM NOT PRESENT */ + case 0x3a01: /* MEDIUM NOT PRESENT TRAY CLOSED */ + case 0x3a02: /* MEDIUM NOT PRESENT TRAY OPEN */ + return ENOMEDIUM; + case 0x2700: /* WRITE PROTECTED */ + return EACCES; + case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */ + return EAGAIN; + case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */ + return ENOTCONN; + default: + return EIO; + } +} + +int scsi_sense_buf_to_errno(const uint8_t *sense, size_t sense_size) +{ + int key, asc, ascq; + if (sense_size < 1) { + return EIO; + } + switch (sense[0]) { + case 0x70: /* Fixed format sense data. */ + if (sense_size < 14) { + return EIO; + } + key = sense[2] & 0xF; + asc = sense[12]; + ascq = sense[13]; + break; + case 0x72: /* Descriptor format sense data. */ + if (sense_size < 4) { + return EIO; + } + key = sense[1] & 0xF; + asc = sense[2]; + ascq = sense[3]; + break; + default: + return EIO; + break; + } + return scsi_sense_to_errno(key, asc, ascq); +} + +const char *scsi_command_name(uint8_t cmd) +{ + static const char *names[] = { + [ TEST_UNIT_READY ] = "TEST_UNIT_READY", + [ REWIND ] = "REWIND", + [ REQUEST_SENSE ] = "REQUEST_SENSE", + [ FORMAT_UNIT ] = "FORMAT_UNIT", + [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", + [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", + /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ + [ READ_6 ] = "READ_6", + [ WRITE_6 ] = "WRITE_6", + [ SET_CAPACITY ] = "SET_CAPACITY", + [ READ_REVERSE ] = "READ_REVERSE", + [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", + [ SPACE ] = "SPACE", + [ INQUIRY ] = "INQUIRY", + [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", + [ MAINTENANCE_IN ] = "MAINTENANCE_IN", + [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", + [ MODE_SELECT ] = "MODE_SELECT", + [ RESERVE ] = "RESERVE", + [ RELEASE ] = "RELEASE", + [ COPY ] = "COPY", + [ ERASE ] = "ERASE", + [ MODE_SENSE ] = "MODE_SENSE", + [ START_STOP ] = "START_STOP/LOAD_UNLOAD", + /* LOAD_UNLOAD and START_STOP use the same operation code */ + [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", + [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", + [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", + [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", + [ READ_10 ] = "READ_10", + [ WRITE_10 ] = "WRITE_10", + [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", + /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ + [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", + [ VERIFY_10 ] = "VERIFY_10", + [ SEARCH_HIGH ] = "SEARCH_HIGH", + [ SEARCH_EQUAL ] = "SEARCH_EQUAL", + [ SEARCH_LOW ] = "SEARCH_LOW", + [ SET_LIMITS ] = "SET_LIMITS", + [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", + /* READ_POSITION and PRE_FETCH use the same operation code */ + [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", + [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", + [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", + /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ + [ MEDIUM_SCAN ] = "MEDIUM_SCAN", + [ COMPARE ] = "COMPARE", + [ COPY_VERIFY ] = "COPY_VERIFY", + [ WRITE_BUFFER ] = "WRITE_BUFFER", + [ READ_BUFFER ] = "READ_BUFFER", + [ UPDATE_BLOCK ] = "UPDATE_BLOCK", + [ READ_LONG_10 ] = "READ_LONG_10", + [ WRITE_LONG_10 ] = "WRITE_LONG_10", + [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", + [ WRITE_SAME_10 ] = "WRITE_SAME_10", + [ UNMAP ] = "UNMAP", + [ READ_TOC ] = "READ_TOC", + [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", + [ SANITIZE ] = "SANITIZE", + [ GET_CONFIGURATION ] = "GET_CONFIGURATION", + [ LOG_SELECT ] = "LOG_SELECT", + [ LOG_SENSE ] = "LOG_SENSE", + [ MODE_SELECT_10 ] = "MODE_SELECT_10", + [ RESERVE_10 ] = "RESERVE_10", + [ RELEASE_10 ] = "RELEASE_10", + [ MODE_SENSE_10 ] = "MODE_SENSE_10", + [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", + [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", + [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", + [ EXTENDED_COPY ] = "EXTENDED_COPY", + [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", + [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", + [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", + [ READ_16 ] = "READ_16", + [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", + [ WRITE_16 ] = "WRITE_16", + [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", + [ VERIFY_16 ] = "VERIFY_16", + [ PRE_FETCH_16 ] = "PRE_FETCH_16", + [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", + /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ + [ LOCATE_16 ] = "LOCATE_16", + [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", + /* ERASE_16 and WRITE_SAME_16 use the same operation code */ + [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", + [ WRITE_LONG_16 ] = "WRITE_LONG_16", + [ REPORT_LUNS ] = "REPORT_LUNS", + [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", + [ MOVE_MEDIUM ] = "MOVE_MEDIUM", + [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", + [ READ_12 ] = "READ_12", + [ WRITE_12 ] = "WRITE_12", + [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", + /* ERASE_12 and GET_PERFORMANCE use the same operation code */ + [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", + [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", + [ VERIFY_12 ] = "VERIFY_12", + [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", + [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", + [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", + [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", + [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", + /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ + [ READ_CD ] = "READ_CD", + [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", + [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", + [ RESERVE_TRACK ] = "RESERVE_TRACK", + [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", + [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", + [ SET_CD_SPEED ] = "SET_CD_SPEED", + [ SET_READ_AHEAD ] = "SET_READ_AHEAD", + [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", + [ MECHANISM_STATUS ] = "MECHANISM_STATUS", + [ GET_EVENT_STATUS_NOTIFICATION ] = "GET_EVENT_STATUS_NOTIFICATION", + [ READ_DISC_INFORMATION ] = "READ_DISC_INFORMATION", + }; + + if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) { + return "*UNKNOWN*"; + } + return names[cmd]; +} -- cgit v1.2.3