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file_optical.c
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file_optical.c
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/*
* Copyright 2016, IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
/*
* Block driver for the File Optical Format.
*
* Copyright (C) 2016, IBM Corp.
* Authors: Michael Cyr <mikecyr@linux.vnet.ibm.com>
* Authors: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#define _GNU_SOURCE
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <endian.h>
#include <scsi/scsi.h>
#include <linux/cdrom.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include "tcmu-runner.h"
#include "libtcmu.h"
struct fbo_state {
int fd;
uint64_t num_lbas;
uint32_t block_size;
uint32_t cur_lba;
#define FBO_READ_ONLY 0x01
#define FBO_PREV_EJECT 0x02
#define FBO_DEV_IO 0x04
#define FBO_BUSY_EVENT 0x08
#define FBO_FORMATTING 0x10
#define FBO_FORMAT_IMMED 0x20
uint32_t flags;
uint32_t format_progress;
uint8_t event_op_ch_code;
uint8_t async_cache_count;
pthread_mutex_t state_mtx;
pthread_mutex_t completion_mtx;
int curr_handler;
};
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
static int fbo_handle_cmd(struct tcmu_device *dev, struct tcmulib_cmd *cmd);
static void fbo_report_op_change(struct tcmu_device *dev, uint8_t code)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
pthread_mutex_lock(&state->state_mtx);
if (code > state->event_op_ch_code)
state->event_op_ch_code = code;
pthread_mutex_unlock(&state->state_mtx);
}
static bool fbo_check_config(const char *cfgstring, char **reason)
{
char *options;
char *path;
int fd;
tcmu_dbg("check: cfgstring %s\n", cfgstring);
options = strchr(cfgstring, '/');
if (!options) {
if (asprintf(reason, "Invalid cfgstring") == -1)
*reason = NULL;
return false;
}
options += 1; /* get past '/' */
while (options[0] != '/') {
if (strncasecmp(options, "ro/", 3)) {
if (asprintf(reason, "Unknown option %s\n",
options) == -1)
*reason = NULL;
return false;
}
options = strchr(options, '/');
if (!options) {
if (asprintf(reason, "Invalid cfgstring") == -1)
*reason = NULL;
return false;
}
options += 1;
}
path = options;
if (!path) {
if (asprintf(reason, "No path found") == -1)
*reason = NULL;
return false;
}
if (access(path, R_OK) != -1)
return true; /* File exists */
/* We also support creating the file, so see if we can create it */
/* NB: If we're creating it, then we'll need write permission */
fd = creat(path, S_IRUSR | S_IWUSR);
if (fd == -1) {
if (asprintf(reason, "Could not create file") == -1)
*reason = NULL;
return false;
}
unlink(path);
return true;
}
/* Note: this is called per lun, not per mapping */
static int fbo_open(struct tcmu_device *dev)
{
struct fbo_state *state;
int64_t size;
char *options;
char *path;
state = calloc(1, sizeof(*state));
if (!state)
return -ENOMEM;
tcmu_set_dev_private(dev, state);
#if 0
/* TBD: If we can figure out how the hw_block_size attribute
* gets set (and change it), we could use that in the future.
*/
state->block_size = tcmu_get_attribute(dev, "hw_block_size");
if (state->block_size == -1) {
tcmu_err("Could not get device block size\n");
goto err;
}
tcmu_set_dev_block_size(dev, state->block_size);
#else
/* MM logical units use a block size of 2048 */
state->block_size = 2048;
tcmu_set_dev_block_size(dev, state->block_size);
#endif
size = tcmu_get_device_size(dev);
if (size == -1) {
tcmu_err("Could not get device size\n");
goto err;
}
tcmu_set_dev_num_lbas(dev, size / state->block_size);
state->num_lbas = size / state->block_size;
tcmu_dbg("open: cfgstring %s\n", tcmu_get_dev_cfgstring(dev));
options = strchr(tcmu_get_dev_cfgstring(dev), '/');
if (!options) {
tcmu_err("invalid cfgstring\n");
goto err;
}
options += 1; /* get past '/' */
while (options[0] != '/') {
if (!strncasecmp(options, "ro/", 3))
state->flags |= FBO_READ_ONLY;
else
tcmu_err("Ignoring unknown option %s\n", options);
options = strchr(options, '/');
if (!options) {
tcmu_err("no path found in cfgstring");
goto err;
}
options += 1;
}
path = options;
if (!path) {
tcmu_err("no path found in cfgstring\n");
goto err;
}
if (access(path, F_OK) == -1)
state->fd = open(path, O_CREAT | O_RDWR | O_EXCL,
S_IRUSR | S_IWUSR);
else if (state->flags & FBO_READ_ONLY)
state->fd = open(path, O_RDONLY, 0);
else
state->fd = open(path, O_RDWR, 0);
if (state->fd == -1) {
tcmu_err("could not open %s: %m\n", path);
goto err;
}
tcmu_dbg("FBO Open: fd %d\n", state->fd);
pthread_mutex_init(&state->state_mtx, NULL);
pthread_mutex_init(&state->completion_mtx, NULL);
/* Record that we've changed our Operational state */
fbo_report_op_change(dev, 0x02);
return 0;
err:
free(state);
return -EINVAL;
}
static void fbo_close(struct tcmu_device *dev)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
close(state->fd);
free(state);
}
static int set_medium_error(uint8_t *sense, unsigned asc_ascq)
{
return tcmu_set_sense_data(sense, MEDIUM_ERROR, asc_ascq, NULL);
}
static int fbo_emulate_inquiry(uint8_t *cdb, struct iovec *iovec, size_t iov_cnt,
uint8_t *sense)
{
uint8_t buf[36];
if ((cdb[1] & 0x01) || cdb[2])
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
memset(buf, 0, sizeof(buf));
buf[0] = 0x05; /* CD/DVD device */
buf[1] = 0x80; /* Removable Medium Bit */
buf[2] = 0x05; /* SPC-3 */
buf[3] = 0x02; /* response data format */
buf[7] = 0x02; /* CmdQue */
memcpy(&buf[8], "LIO-ORG ", 8);
memset(&buf[16], 0x20, 16);
memcpy(&buf[16], "VOPTA", 5);
memcpy(&buf[32], "0001", 4);
buf[4] = 31; /* additional length */
/* TBD: Resid data? */
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, sizeof(buf));
return SAM_STAT_GOOD;
}
static int fbo_emulate_request_sense(struct tcmu_device *dev, uint8_t *cdb,
struct iovec *iovec, size_t iov_cnt,
uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
uint8_t buf[18];
if (cdb[1] & 0x01)
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
/* Note that upon successful completion, Request Sense returns the
* sense data in the data buffer, not as sense data.
*/
memset(buf, 0, sizeof(buf));
buf[0] = 0x70;
buf[7] = 0xa;
if (state->flags & FBO_FORMATTING) {
buf[2] = NOT_READY;
buf[12] = 0x04; // Not Ready
buf[13] = 0x04; // Format in progress
buf[15] = 0x80;
*(uint16_t *)&buf[16] = htobe16(state->format_progress);
}
else {
buf[2] = NO_SENSE;
}
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, sizeof(buf));
return SAM_STAT_GOOD;
}
static int fbo_handle_rwerp_page(uint8_t *buf, size_t buf_len,
uint8_t page_control)
{
if (buf_len < 12)
return -1;
buf[0] = GPMODE_R_W_ERROR_PAGE;
buf[1] = 10;
if (page_control != 1) {
buf[3] = 5; /* Read Retry Count */
buf[8] = 5; /* Write Retry Count */
}
return 12;
}
static int fbo_handle_cache_page(uint8_t *buf, size_t buf_len,
uint8_t page_control)
{
if (buf_len < 12)
return -1;
buf[0] = GPMODE_WCACHING_PAGE;
buf[1] = 10;
if (page_control != 1) {
buf[2] = 4; /* WCE=1 */
}
return 12;
}
static int fbo_handle_timeout_page(uint8_t *buf, size_t buf_len,
uint8_t page_control)
{
if (buf_len < 10)
return -1;
buf[0] = GPMODE_TO_PROTECT_PAGE;
buf[1] = 8;
if (page_control != 1) {
buf[6] = 0xff;
buf[7] = 0xff;
buf[8] = 0xff;
buf[9] = 0xff;
}
return 10;
}
static struct {
uint8_t page;
int (*get)(uint8_t *buf, size_t buf_len, uint8_t page_control);
} fbo_modesense_handlers[] = {
{ GPMODE_R_W_ERROR_PAGE, fbo_handle_rwerp_page },
{ GPMODE_WCACHING_PAGE, fbo_handle_cache_page },
{ GPMODE_TO_PROTECT_PAGE, fbo_handle_timeout_page },
};
static int fbo_emulate_mode_sense(uint8_t *cdb, struct iovec *iovec,
size_t iov_cnt, uint8_t *sense)
{
bool sense_ten = (cdb[0] == MODE_SENSE_10);
uint8_t page_control = (cdb[2] >> 6) & 0x3;
uint8_t page_code = cdb[2] & 0x3F;
bool return_pages = true;
size_t alloc_len = tcmu_get_xfer_length(cdb);
int i;
int ret;
int used_len;
uint8_t buf[512];
bool got_sense = false;
/* We don't support saved pages */
if (page_control == 3)
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_SAVING_PARAMETERS_NOT_SUPPORTED,
NULL);
memset(buf, 0, sizeof(buf));
if ((page_code == 0) && (page_control == 0))
return_pages = false;
/* Mode parameter header length */
used_len = sense_ten ? 8 : 4;
if (return_pages) {
if (page_code == 0x3f) {
got_sense = true;
for (i = 0; i < ARRAY_SIZE(fbo_modesense_handlers);
i++) {
ret = fbo_modesense_handlers[i].get(&buf[used_len],
sizeof(buf) - used_len,
page_control);
if (ret <= 0)
break;
if (used_len + ret >= alloc_len)
break;
used_len += ret;
}
}
else {
for (i = 0; i < ARRAY_SIZE(fbo_modesense_handlers);
i++) {
if (page_code == fbo_modesense_handlers[i].page) {
ret = fbo_modesense_handlers[i].get(&buf[used_len],
sizeof(buf) - used_len,
page_control);
if (ret <= 0)
break;
used_len += ret;
got_sense = true;
break;
}
}
}
if (!got_sense)
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
}
if (sense_ten) {
uint16_t *ptr = (uint16_t *)buf;
*ptr = htobe16(used_len - 2);
}
else {
buf[0] = used_len - 1;
}
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, used_len);
return SAM_STAT_GOOD;
}
static int fbo_emulate_mode_select(uint8_t *cdb, struct iovec *iovec,
size_t iov_cnt, uint8_t *sense)
{
bool select_ten = (cdb[0] == MODE_SELECT_10);
uint8_t page_code;
size_t alloc_len = tcmu_get_xfer_length(cdb);
int i;
int ret;
int used_len;
uint8_t buf[512];
uint8_t in_buf[512];
bool got_sense;
/* Abort if !PF or SP */
if (!(cdb[1] & 0x10) || (cdb[1] & 0x01))
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
if (alloc_len > sizeof(in_buf))
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_PARAMETER_LIST_LENGTH_ERROR,
NULL);
memset(buf, 0, sizeof(buf));
if (tcmu_memcpy_from_iovec(in_buf, sizeof(in_buf), iovec, iov_cnt) !=
alloc_len)
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_PARAMETER_LIST_LENGTH_ERROR,
NULL);
/* Mode parameter header length */
used_len = select_ten ? 8 : 4;
while (alloc_len > used_len) {
got_sense = false;
page_code = in_buf[used_len];
for (i = 0; i < ARRAY_SIZE(fbo_modesense_handlers); i++) {
if (page_code == fbo_modesense_handlers[i].page) {
ret = fbo_modesense_handlers[i].get(&buf[used_len],
sizeof(buf) - used_len,
0);
if (ret <= 0)
return tcmu_set_sense_data(sense,
ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB,
NULL);
if (used_len + ret > alloc_len)
return tcmu_set_sense_data(sense,
ILLEGAL_REQUEST,
ASC_PARAMETER_LIST_LENGTH_ERROR,
NULL);
got_sense = true;
break;
}
}
if (!got_sense)
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_PARAMETER_LIST,
NULL);
/* We don't support changing anything, so data must match */
if (memcmp(&buf[used_len], &in_buf[used_len], ret))
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_PARAMETER_LIST,
NULL);
used_len += ret;
}
return SAM_STAT_GOOD;
}
static int fbo_emulate_allow_medium_removal(struct tcmu_device *dev,
uint8_t *cdb, uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
/* We're ignoring the persistent prevent bit */
if (cdb[4] & 0x01)
state->flags |= FBO_PREV_EJECT;
else
state->flags &= ~FBO_PREV_EJECT;
return SAM_STAT_GOOD;
}
static int fbo_emulate_read_toc(struct tcmu_device *dev, uint8_t *cdb,
struct iovec *iovec, size_t iov_cnt,
uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
uint8_t time_bit = cdb[1] & 0x02;
uint8_t format = cdb[2] & 0x0f;
uint8_t buf[512];
memset(buf, 0, sizeof(buf));
// TBD: If we simulate start/stop, then fail if stopped
switch (format) {
case 0x00: // Formatted TOC
buf[1] = 0x12; // TOC Data Length
buf[2] = 1; // First Track
buf[3] = 1; // Last Track
buf[5] = 0x14; // ADR + CONTROL
buf[6] = 1; // Track #
if (time_bit)
buf[10] = CDROM_MSF; // 00:00:02:00
if (state->flags & FBO_READ_ONLY)
buf[13] = 0x14; // ADR + CONTROL
else
buf[13] = 0x17; // ADR + CONTROL
buf[14] = CDROM_LEADOUT; // Track #
if (time_bit) {
/* Max time address is 00:FF:3B:4A */
if (state->num_lbas >=
(0xff * CD_SECS + CD_SECS - 1) * CD_FRAMES +
CD_FRAMES - 1 - CD_MSF_OFFSET) {
buf[17] = 0xff;
buf[18] = CD_SECS - 1;
buf[19] = CD_FRAMES - 1;
}
else {
buf[17] = (state->num_lbas / CD_FRAMES + 2) /
CD_SECS;
buf[18] = (state->num_lbas / CD_FRAMES + 2) %
CD_SECS;
buf[19] = state->num_lbas % CD_FRAMES;
}
}
else {
*(uint32_t *)&buf[16] = htobe32(state->num_lbas);
}
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, 0x14);
break;
case 0x01: // Multi-Session Information
buf[1] = 0xa; // TOC Data Length
buf[2] = 1; // First Complete Session
buf[3] = 1; // Last Complete Session
buf[5] = 0x14; // ADR + CONTROL
buf[6] = 1; // Track #
if (time_bit)
buf[10] = 2; // 00:00:02:00
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, 0xc);
break;
default:
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
}
return SAM_STAT_GOOD;
}
static int fbo_emulate_get_configuration(struct tcmu_device *dev, uint8_t *cdb,
struct iovec *iovec, size_t iov_cnt,
uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
uint8_t rt = cdb[1] & 0x03;
uint16_t start = be16toh(*(uint16_t *)&cdb[2]);
int used_len;
uint8_t *cur;
uint8_t buf[512];
/* Reserved value for RT */
if (rt == 3)
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
memset(buf, 0, sizeof(buf));
/* Set current profile in the feature header */
if (state->flags & FBO_READ_ONLY)
*(uint16_t *)&buf[6] = htobe16(0x10); // DVD-ROM
else
*(uint16_t *)&buf[6] = htobe16(0x12); // DVD-RAM
/* Feature header */
used_len = 8;
/* Profile List Feature */
if ((rt == 2 && start == 0x0000) ||
(start <= 0x0000 && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0000);
cur[2] = 3; // persistent=1, current=1
cur[3] = 16; // # of profile descriptors * 4
*(uint16_t *)&cur[4] = htobe16(0x12); // DVD-RAM Profile
if (!(state->flags & FBO_READ_ONLY))
cur[6] = 1; // active profile
*(uint16_t *)&cur[8] = htobe16(0x10); // DVD-ROM Profile
if (state->flags & FBO_READ_ONLY)
cur[10] = 1; // active profile
*(uint16_t *)&cur[12] = htobe16(0x0a); // CD-RW Profile
*(uint16_t *)&cur[16] = htobe16(0x08); // CD-ROM Profile
used_len += 20;
}
/* Core Feature */
if ((rt == 2 && start == 0x0001) ||
(start <= 0x0001 && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0001);
cur[2] = 7; // version=1, persistent=1, current=1
cur[3] = 8; // additional length
/* SCSI Physical Interface Standard */
*(uint32_t *)&cur[4] = htobe32(1);
cur[8] = 1; // Device Busy Event
used_len += 12;
}
/* Morphing Feature */
if ((rt == 2 && start == 0x0002) ||
(start <= 0x0002 && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0002);
cur[2] = 7; // version=1, persistent=1, current=1
cur[3] = 4; // additional length
cur[4] = 2; // OCEvent = 1, ASYNC = 0
used_len += 8;
}
/* Removable Medium Feature */
if ((rt == 2 && start == 0x0003) ||
(start <= 0x0003 && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0003);
cur[2] = 3; // persistent=1, current=1
cur[3] = 4; // additional length
cur[4] = 0x20; // mechanism=1, eject=0, pvnt jmpr=0, lock=0
used_len += 8;
}
/* Random Readable Feature */
if ((rt == 2 && start == 0x0010) ||
(start <= 0x0010 && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0010);
cur[2] = 1; // version=0, persistent=0, current=1
cur[3] = 8; // additional length
*(uint32_t *)&cur[4] = htobe32(state->block_size);
*(uint16_t *)&cur[8] = htobe16(0x10); // Blocking
cur[10] = 0x01; // PP=1
used_len += 12;
}
/* Multi Read Feature - never current */
if ((rt == 2 && start == 0x001d) ||
(start <= 0x001d && rt == 0)) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x001d);
cur[2] = 0; // version=0, persistent=0, current=0
cur[3] = 0; // additional length
used_len += 4;
}
/* CD Read Feature - never current */
if ((rt == 2 && start == 0x001e) ||
(start <= 0x001e && rt == 0)) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x001e);
cur[2] = 8; // version=2, persistent=0, current=0
cur[3] = 4; // additional length
used_len += 8;
}
/* DVD Read Feature */
if ((rt == 2 && start == 0x001f) ||
(start <= 0x001f && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x001f);
cur[2] = 1; // version=0, persistent=0, current=1
cur[3] = 0; // additional length
used_len += 4;
}
/* Random Writable Feature */
if ((rt == 2 && start == CDF_RWRT) ||
(start <= CDF_RWRT &&
(rt == 0 || (rt == 1 && !(state->flags & FBO_READ_ONLY))))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(CDF_RWRT);
if (state->flags & FBO_READ_ONLY)
cur[2] = 4; // version=1, persistent=0, current=0
else
cur[2] = 5; // version=1, persistent=0, current=1
cur[3] = 0xc; // additional length
*(uint32_t *)&cur[4] = htobe32(state->num_lbas - 1);
*(uint32_t *)&cur[8] = htobe32(state->block_size);
*(uint16_t *)&cur[12] = htobe16(0x10); // Blocking
cur[14] = 0x01; // PP=1
used_len += 16;
}
/* Incremental Streaming Writable Feature - never current */
if ((rt == 2 && start == 0x0021) ||
(start <= 0x0021 && rt == 0)) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0021);
cur[2] = 4; // version=1, persistent=0, current=0
cur[3] = 4; // additional length
used_len += 8;
}
/* Formattable Feature */
if ((rt == 2 && start == 0x0023) ||
(start <= 0x0023 &&
(rt == 0 || (rt == 1 && !(state->flags & FBO_READ_ONLY))))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0023);
if (state->flags & FBO_READ_ONLY)
cur[2] = 0; // version=0, persistent=0, current=0
else
cur[2] = 1; // version=0, persistent=0, current=1
cur[3] = 0; // additional length
used_len += 4;
}
/* Hardware Defect Management Feature */
if ((rt == 2 && start == CDF_HWDM) ||
(start <= CDF_HWDM &&
(rt == 0 || (rt == 1 && !(state->flags & FBO_READ_ONLY))))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(CDF_HWDM);
if (state->flags & FBO_READ_ONLY)
cur[2] = 4; // version=1, persistent=0, current=0
else
cur[2] = 5; // version=1, persistent=0, current=1
cur[3] = 4; // additional length
used_len += 8;
}
/* Restricted Overwrite Feature - never current */
if ((rt == 2 && start == 0x0026) ||
(start <= 0x0026 && rt == 0)) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0026);
cur[2] = 0; // version=0, persistent=0, current=0
cur[3] = 0; // additional length
used_len += 4;
}
/* CD Track at Once Feature - never current */
if ((rt == 2 && start == 0x002d) ||
(start <= 0x002d && rt == 0)) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x002d);
cur[2] = 8; // version=2, persistent=0, current=0
cur[3] = 4; // additional length
used_len += 8;
}
/* Timeout Feature */
if ((rt == 2 && start == 0x0105) ||
(start <= 0x0105 && (rt == 0 || rt == 1))) {
cur = &buf[used_len];
*(uint16_t *)&cur[0] = htobe16(0x0105);
cur[2] = 5; // version=1, persistent=0, current=1
cur[3] = 4; // additional length
used_len += 8;
}
*(uint32_t *)&buf[0] = htobe32(used_len - 4);
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, used_len);
return SAM_STAT_GOOD;
}
static int fbo_emulate_get_event_status_notification(struct tcmu_device *dev,
uint8_t *cdb,
struct iovec *iovec,
size_t iov_cnt,
uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
uint8_t class_req = cdb[4];
uint16_t alloc_len = tcmu_get_xfer_length(cdb);
int used_len;
uint8_t buf[8];
if (!(cdb[1] & 0x01))
/* We don't support asynchronous operation */
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
memset(buf, 0, sizeof(buf));
buf[3] = 0x42; // Operational Change and Device Busy
if (!(class_req & 0x42)) {
/* We don't support any requested notification classes */
buf[2] = 0x80;
used_len = 4;
goto done;
}
pthread_mutex_lock(&state->state_mtx);
if (class_req & 0x02 &&
(state->event_op_ch_code || !(class_req & 0x40) ||
!(state->flags & FBO_BUSY_EVENT)))
{
/* We're reporting an Operational Change event */
buf[2] = 1;
if (alloc_len > 4)
{
buf[4] = state->event_op_ch_code;
if (state->event_op_ch_code)
*(uint16_t *)&buf[6] = htobe16(0x0001);
state->event_op_ch_code = 0;
used_len = 8;
}
else {
/* Only return the header */
used_len = 4;
}
}
else {
/* We're reporting a Device Busy event */
buf[2] = 6;
if (alloc_len > 4)
{
if (state->flags & FBO_BUSY_EVENT) {
/* A Busy Event has occurred */
buf[4] = 1;
state->flags &= ~FBO_BUSY_EVENT;
}
if ((state->flags & FBO_FORMAT_IMMED) ||
state->async_cache_count)
/* Our current state is "busy" */
buf[5] = 1;
used_len = 8;
}
else {
/* Only return the header */
used_len = 4;
}
}
pthread_mutex_unlock(&state->state_mtx);
done:
*(uint16_t *)&buf[0] = htobe16(used_len - 4);
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, used_len);
return SAM_STAT_GOOD;
}
static int fbo_emulate_read_disc_information(struct tcmu_device *dev,
uint8_t *cdb, struct iovec *iovec,
size_t iov_cnt, uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
uint8_t buf[34];
memset(buf, 0, sizeof(buf));
buf[1] = 32; // Disc Information Length
if (state->flags & FBO_READ_ONLY)
buf[2] = 0x0E; // Era=0, Last=3, Status=2
else
buf[2] = 0x1F; // Era=1, Last=3, Status=3
buf[3] = 1; // First Track
buf[4] = 1; // One session
buf[5] = 1; // First Track (LSB)
buf[6] = 1; // Last Track (LSB)
buf[7] = 0x20; // URU=1
tcmu_memcpy_into_iovec(iovec, iov_cnt, buf, 34);
return SAM_STAT_GOOD;
}
static int fbo_emulate_read_dvd_structure(struct tcmu_device *dev, uint8_t *cdb,
struct iovec *iovec, size_t iov_cnt,
uint8_t *sense)
{
struct fbo_state *state = tcmu_get_dev_private(dev);
uint8_t format = cdb[7];
uint32_t start_phys;
uint32_t end_phys;
char manuf_info[] = "VIRTUAL FB OPT";
uint8_t buf[512];
// TBD: If we simulate start/stop, then fail if stopped and format != 0xff
/* Fail anything other than layer 0 */
if (cdb[6])
return tcmu_set_sense_data(sense, ILLEGAL_REQUEST,
ASC_INVALID_FIELD_IN_CDB, NULL);
memset(buf, 0, sizeof(buf));
switch (format) {
case DVD_STRUCT_PHYSICAL:
if (state->flags & FBO_READ_ONLY)
start_phys = 0x30000;
else
start_phys = 0x31000;
buf[1] = 19; //DVD Structure Data Length
if (state->flags & FBO_READ_ONLY)
buf[4] = 0x02; // Book Type=0, Part Version=2
else
buf[4] = 0x12; // Book Type=1, Part Version=2
buf[5] = 0x0f; // Maximum Rate=Not specified
if (!(state->flags & FBO_READ_ONLY))
buf[6] = 0x02; // Layer Type=2
buf[9] = start_phys >> 16; // Starting physical sector
*(uint16_t *)&buf[10] = htobe16(start_phys & 0xffff);
end_phys = start_phys + state->num_lbas - 1;