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fe8fc5ae5c
Proper support of persistent reservation for multipath devices requires communication with the multipath daemon, so that the reservation is registered and applied when a path comes up. The device mapper utilities provide a library to do so; this patch makes qemu-pr-helper.c detect multipath devices and, when one is found, delegate the operation to libmpathpersist. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
549 lines
18 KiB
C
549 lines
18 KiB
C
/*
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* SCSI helpers
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*
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* Copyright 2017 Red Hat, Inc.
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*
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* Authors:
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* Fam Zheng <famz@redhat.com>
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* Paolo Bonzini <pbonzini@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include "qemu/osdep.h"
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#include "scsi/constants.h"
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#include "scsi/utils.h"
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#include "qemu/bswap.h"
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uint32_t scsi_data_cdb_xfer(uint8_t *buf)
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{
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if ((buf[0] >> 5) == 0 && buf[4] == 0) {
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return 256;
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} else {
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return scsi_cdb_xfer(buf);
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}
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}
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uint32_t scsi_cdb_xfer(uint8_t *buf)
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{
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switch (buf[0] >> 5) {
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case 0:
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return buf[4];
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break;
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case 1:
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case 2:
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return lduw_be_p(&buf[7]);
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break;
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case 4:
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return ldl_be_p(&buf[10]) & 0xffffffffULL;
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break;
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case 5:
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return ldl_be_p(&buf[6]) & 0xffffffffULL;
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break;
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default:
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return -1;
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}
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}
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uint64_t scsi_cmd_lba(SCSICommand *cmd)
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{
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uint8_t *buf = cmd->buf;
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uint64_t lba;
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switch (buf[0] >> 5) {
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case 0:
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lba = ldl_be_p(&buf[0]) & 0x1fffff;
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break;
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case 1:
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case 2:
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case 5:
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lba = ldl_be_p(&buf[2]) & 0xffffffffULL;
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break;
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case 4:
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lba = ldq_be_p(&buf[2]);
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break;
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default:
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lba = -1;
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}
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return lba;
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}
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int scsi_cdb_length(uint8_t *buf)
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{
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int cdb_len;
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switch (buf[0] >> 5) {
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case 0:
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cdb_len = 6;
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break;
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case 1:
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case 2:
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cdb_len = 10;
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break;
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case 4:
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cdb_len = 16;
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break;
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case 5:
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cdb_len = 12;
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break;
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default:
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cdb_len = -1;
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}
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return cdb_len;
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}
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int scsi_build_sense(uint8_t *buf, SCSISense sense)
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{
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memset(buf, 0, 18);
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buf[0] = 0x70;
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buf[2] = sense.key;
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buf[7] = 10;
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buf[12] = sense.asc;
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buf[13] = sense.ascq;
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return 18;
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}
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/*
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* Predefined sense codes
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*/
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/* No sense data available */
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const struct SCSISense sense_code_NO_SENSE = {
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.key = NO_SENSE , .asc = 0x00 , .ascq = 0x00
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};
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/* LUN not ready, Manual intervention required */
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const struct SCSISense sense_code_LUN_NOT_READY = {
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.key = NOT_READY, .asc = 0x04, .ascq = 0x03
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};
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/* LUN not ready, Medium not present */
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const struct SCSISense sense_code_NO_MEDIUM = {
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.key = NOT_READY, .asc = 0x3a, .ascq = 0x00
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};
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/* LUN not ready, medium removal prevented */
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const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = {
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.key = NOT_READY, .asc = 0x53, .ascq = 0x02
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};
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/* Hardware error, internal target failure */
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const struct SCSISense sense_code_TARGET_FAILURE = {
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.key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00
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};
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/* Illegal request, invalid command operation code */
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const struct SCSISense sense_code_INVALID_OPCODE = {
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.key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00
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};
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/* Illegal request, LBA out of range */
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const struct SCSISense sense_code_LBA_OUT_OF_RANGE = {
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.key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00
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};
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/* Illegal request, Invalid field in CDB */
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const struct SCSISense sense_code_INVALID_FIELD = {
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.key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00
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};
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/* Illegal request, Invalid field in parameter list */
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const struct SCSISense sense_code_INVALID_PARAM = {
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.key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00
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};
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/* Illegal request, Parameter list length error */
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const struct SCSISense sense_code_INVALID_PARAM_LEN = {
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.key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00
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};
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/* Illegal request, LUN not supported */
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const struct SCSISense sense_code_LUN_NOT_SUPPORTED = {
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.key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00
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};
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/* Illegal request, Saving parameters not supported */
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const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = {
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.key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00
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};
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/* Illegal request, Incompatible medium installed */
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const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = {
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.key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00
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};
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/* Illegal request, medium removal prevented */
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const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = {
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.key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02
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};
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/* Illegal request, Invalid Transfer Tag */
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const struct SCSISense sense_code_INVALID_TAG = {
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.key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01
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};
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/* Command aborted, I/O process terminated */
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const struct SCSISense sense_code_IO_ERROR = {
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.key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06
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};
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/* Command aborted, I_T Nexus loss occurred */
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const struct SCSISense sense_code_I_T_NEXUS_LOSS = {
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.key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07
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};
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/* Command aborted, Logical Unit failure */
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const struct SCSISense sense_code_LUN_FAILURE = {
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.key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01
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};
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/* Command aborted, Overlapped Commands Attempted */
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const struct SCSISense sense_code_OVERLAPPED_COMMANDS = {
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.key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00
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};
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/* Command aborted, LUN Communication Failure */
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const struct SCSISense sense_code_LUN_COMM_FAILURE = {
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.key = ABORTED_COMMAND, .asc = 0x08, .ascq = 0x00
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};
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/* Unit attention, Capacity data has changed */
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const struct SCSISense sense_code_CAPACITY_CHANGED = {
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.key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09
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};
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/* Unit attention, Power on, reset or bus device reset occurred */
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const struct SCSISense sense_code_RESET = {
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.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00
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};
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/* Unit attention, SCSI bus reset */
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const struct SCSISense sense_code_SCSI_BUS_RESET = {
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.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x02
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};
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/* Unit attention, No medium */
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const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = {
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.key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00
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};
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/* Unit attention, Medium may have changed */
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const struct SCSISense sense_code_MEDIUM_CHANGED = {
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.key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00
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};
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/* Unit attention, Reported LUNs data has changed */
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const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = {
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.key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e
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};
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/* Unit attention, Device internal reset */
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const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
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.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
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};
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/* Data Protection, Write Protected */
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const struct SCSISense sense_code_WRITE_PROTECTED = {
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.key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00
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};
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/* Data Protection, Space Allocation Failed Write Protect */
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const struct SCSISense sense_code_SPACE_ALLOC_FAILED = {
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.key = DATA_PROTECT, .asc = 0x27, .ascq = 0x07
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};
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/*
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* scsi_convert_sense
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*
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* Convert between fixed and descriptor sense buffers
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*/
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int scsi_convert_sense(uint8_t *in_buf, int in_len,
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uint8_t *buf, int len, bool fixed)
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{
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bool fixed_in;
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SCSISense sense;
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if (!fixed && len < 8) {
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return 0;
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}
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if (in_len == 0) {
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sense.key = NO_SENSE;
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sense.asc = 0;
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sense.ascq = 0;
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} else {
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fixed_in = (in_buf[0] & 2) == 0;
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if (fixed == fixed_in) {
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memcpy(buf, in_buf, MIN(len, in_len));
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return MIN(len, in_len);
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}
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if (fixed_in) {
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sense.key = in_buf[2];
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sense.asc = in_buf[12];
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sense.ascq = in_buf[13];
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} else {
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sense.key = in_buf[1];
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sense.asc = in_buf[2];
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sense.ascq = in_buf[3];
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}
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}
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memset(buf, 0, len);
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if (fixed) {
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/* Return fixed format sense buffer */
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buf[0] = 0x70;
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buf[2] = sense.key;
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buf[7] = 10;
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buf[12] = sense.asc;
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buf[13] = sense.ascq;
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return MIN(len, SCSI_SENSE_LEN);
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} else {
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/* Return descriptor format sense buffer */
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buf[0] = 0x72;
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buf[1] = sense.key;
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buf[2] = sense.asc;
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buf[3] = sense.ascq;
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return 8;
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}
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}
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int scsi_sense_to_errno(int key, int asc, int ascq)
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{
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switch (key) {
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case 0x00: /* NO SENSE */
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case 0x01: /* RECOVERED ERROR */
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case 0x06: /* UNIT ATTENTION */
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/* These sense keys are not errors */
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return 0;
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case 0x0b: /* COMMAND ABORTED */
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return ECANCELED;
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case 0x02: /* NOT READY */
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case 0x05: /* ILLEGAL REQUEST */
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case 0x07: /* DATA PROTECTION */
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/* Parse ASCQ */
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break;
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default:
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return EIO;
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}
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switch ((asc << 8) | ascq) {
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case 0x1a00: /* PARAMETER LIST LENGTH ERROR */
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case 0x2000: /* INVALID OPERATION CODE */
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case 0x2400: /* INVALID FIELD IN CDB */
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case 0x2600: /* INVALID FIELD IN PARAMETER LIST */
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return EINVAL;
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case 0x2100: /* LBA OUT OF RANGE */
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case 0x2707: /* SPACE ALLOC FAILED */
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return ENOSPC;
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case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */
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return ENOTSUP;
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case 0x3a00: /* MEDIUM NOT PRESENT */
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case 0x3a01: /* MEDIUM NOT PRESENT TRAY CLOSED */
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case 0x3a02: /* MEDIUM NOT PRESENT TRAY OPEN */
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return ENOMEDIUM;
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case 0x2700: /* WRITE PROTECTED */
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return EACCES;
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case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */
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return EAGAIN;
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case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */
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return ENOTCONN;
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default:
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return EIO;
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}
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}
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int scsi_sense_buf_to_errno(const uint8_t *sense, size_t sense_size)
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{
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int key, asc, ascq;
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if (sense_size < 1) {
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return EIO;
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}
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switch (sense[0]) {
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case 0x70: /* Fixed format sense data. */
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if (sense_size < 14) {
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return EIO;
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}
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key = sense[2] & 0xF;
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asc = sense[12];
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ascq = sense[13];
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break;
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case 0x72: /* Descriptor format sense data. */
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if (sense_size < 4) {
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return EIO;
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}
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key = sense[1] & 0xF;
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asc = sense[2];
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ascq = sense[3];
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break;
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default:
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return EIO;
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break;
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}
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return scsi_sense_to_errno(key, asc, ascq);
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}
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const char *scsi_command_name(uint8_t cmd)
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{
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static const char *names[] = {
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[ TEST_UNIT_READY ] = "TEST_UNIT_READY",
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[ REWIND ] = "REWIND",
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[ REQUEST_SENSE ] = "REQUEST_SENSE",
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[ FORMAT_UNIT ] = "FORMAT_UNIT",
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[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
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[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS",
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/* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */
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[ READ_6 ] = "READ_6",
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[ WRITE_6 ] = "WRITE_6",
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[ SET_CAPACITY ] = "SET_CAPACITY",
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[ READ_REVERSE ] = "READ_REVERSE",
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[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
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[ SPACE ] = "SPACE",
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[ INQUIRY ] = "INQUIRY",
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[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
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[ MAINTENANCE_IN ] = "MAINTENANCE_IN",
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[ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
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[ MODE_SELECT ] = "MODE_SELECT",
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[ RESERVE ] = "RESERVE",
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[ RELEASE ] = "RELEASE",
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[ COPY ] = "COPY",
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[ ERASE ] = "ERASE",
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[ MODE_SENSE ] = "MODE_SENSE",
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[ START_STOP ] = "START_STOP/LOAD_UNLOAD",
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/* LOAD_UNLOAD and START_STOP use the same operation code */
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[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
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[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
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[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
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[ READ_CAPACITY_10 ] = "READ_CAPACITY_10",
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[ READ_10 ] = "READ_10",
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[ WRITE_10 ] = "WRITE_10",
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[ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT",
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/* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */
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[ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10",
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[ VERIFY_10 ] = "VERIFY_10",
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[ SEARCH_HIGH ] = "SEARCH_HIGH",
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[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
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[ SEARCH_LOW ] = "SEARCH_LOW",
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[ SET_LIMITS ] = "SET_LIMITS",
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[ PRE_FETCH ] = "PRE_FETCH/READ_POSITION",
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/* READ_POSITION and PRE_FETCH use the same operation code */
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[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
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[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
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[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE",
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/* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */
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[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
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[ COMPARE ] = "COMPARE",
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[ COPY_VERIFY ] = "COPY_VERIFY",
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[ WRITE_BUFFER ] = "WRITE_BUFFER",
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[ READ_BUFFER ] = "READ_BUFFER",
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[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
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[ READ_LONG_10 ] = "READ_LONG_10",
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[ WRITE_LONG_10 ] = "WRITE_LONG_10",
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[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
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[ WRITE_SAME_10 ] = "WRITE_SAME_10",
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[ UNMAP ] = "UNMAP",
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[ READ_TOC ] = "READ_TOC",
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[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
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[ SANITIZE ] = "SANITIZE",
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[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
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[ LOG_SELECT ] = "LOG_SELECT",
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[ LOG_SENSE ] = "LOG_SENSE",
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[ MODE_SELECT_10 ] = "MODE_SELECT_10",
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[ RESERVE_10 ] = "RESERVE_10",
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[ RELEASE_10 ] = "RELEASE_10",
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[ MODE_SENSE_10 ] = "MODE_SENSE_10",
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[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
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[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
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[ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16",
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[ EXTENDED_COPY ] = "EXTENDED_COPY",
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[ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16",
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[ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN",
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[ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT",
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[ READ_16 ] = "READ_16",
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[ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE",
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[ 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];
|
|
}
|
|
|
|
#ifdef CONFIG_LINUX
|
|
int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr,
|
|
SCSISense *sense)
|
|
{
|
|
if (errno_value != 0) {
|
|
switch (errno_value) {
|
|
case EDOM:
|
|
return TASK_SET_FULL;
|
|
case ENOMEM:
|
|
*sense = SENSE_CODE(TARGET_FAILURE);
|
|
return CHECK_CONDITION;
|
|
default:
|
|
*sense = SENSE_CODE(IO_ERROR);
|
|
return CHECK_CONDITION;
|
|
}
|
|
} else {
|
|
if (io_hdr->host_status == SG_ERR_DID_NO_CONNECT ||
|
|
io_hdr->host_status == SG_ERR_DID_BUS_BUSY ||
|
|
io_hdr->host_status == SG_ERR_DID_TIME_OUT ||
|
|
(io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT)) {
|
|
return BUSY;
|
|
} else if (io_hdr->host_status) {
|
|
*sense = SENSE_CODE(I_T_NEXUS_LOSS);
|
|
return CHECK_CONDITION;
|
|
} else if (io_hdr->status) {
|
|
return io_hdr->status;
|
|
} else if (io_hdr->driver_status & SG_ERR_DRIVER_SENSE) {
|
|
return CHECK_CONDITION;
|
|
} else {
|
|
return GOOD;
|
|
}
|
|
}
|
|
}
|
|
#endif
|