static void qemu_char_open(Chardev *chr, ChardevBackend *backend,
bool *be_opened, Error **errp)
{
ChardevClass *cc = CHARDEV_GET_CLASS(chr);
/* Any ChardevCommon member would work */
ChardevCommon *common = backend ? backend->u.null.data : NULL;
if (common && common->has_logfile) {
int flags = O_WRONLY | O_CREAT;
if (common->has_logappend &&
common->logappend) {
flags |= O_APPEND;
} else {
flags |= O_TRUNC;
}
chr->logfd = qemu_open(common->logfile, flags, 0666);
if (chr->logfd < 0) {
error_setg_errno(errp, errno,
"Unable to open logfile %s",
common->logfile);
return;
}
}
if (cc->open) {
cc->open(chr, backend, be_opened, errp);
}
}
static void write_pidfile(void)
{
int pidfd;
char pidstr[32];
pidfd = qemu_open(pidfile, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
if (pidfd == -1) {
error_report("Cannot open pid file, %s", strerror(errno));
exit(EXIT_FAILURE);
}
if (lockf(pidfd, F_TLOCK, 0)) {
error_report("Cannot lock pid file, %s", strerror(errno));
goto fail;
}
if (ftruncate(pidfd, 0)) {
error_report("Failed to truncate pid file");
goto fail;
}
snprintf(pidstr, sizeof(pidstr), "%d\n", getpid());
if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
error_report("Failed to write pid file");
goto fail;
}
return;
fail:
unlink(pidfile);
close(pidfd);
exit(EXIT_FAILURE);
}
static int raw_create(const char *filename, QEMUOptionParameter *options)
{
int fd;
int result = 0;
int64_t total_size = 0;
/* Read out options */
while (options && options->name) {
if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
total_size = options->value.n / BDRV_SECTOR_SIZE;
}
options++;
}
fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
0644);
if (fd < 0) {
result = -errno;
} else {
if (ftruncate(fd, total_size * BDRV_SECTOR_SIZE) != 0) {
result = -errno;
}
if (qemu_close(fd) != 0) {
result = -errno;
}
}
return result;
}
static int floppy_probe_device(const char *filename)
{
int fd, ret;
int prio = 0;
struct floppy_struct fdparam;
struct stat st;
if (strstart(filename, "/dev/fd", NULL) &&
!strstart(filename, "/dev/fdset/", NULL)) {
prio = 50;
}
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
goto out;
}
ret = fstat(fd, &st);
if (ret == -1 || !S_ISBLK(st.st_mode)) {
goto outc;
}
/* Attempt to detect via a floppy specific ioctl */
ret = ioctl(fd, FDGETPRM, &fdparam);
if (ret >= 0)
prio = 100;
outc:
qemu_close(fd);
out:
return prio;
}
static int rtc_start_timer(struct qemu_alarm_timer *t)
{
int rtc_fd;
unsigned long current_rtc_freq = 0;
TFR(rtc_fd = qemu_open("/dev/rtc", O_RDONLY));
if (rtc_fd < 0)
return -1;
ioctl(rtc_fd, RTC_IRQP_READ, ¤t_rtc_freq);
if (current_rtc_freq != RTC_FREQ &&
ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) {
fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n"
"error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n"
"type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n");
goto fail;
}
if (ioctl(rtc_fd, RTC_PIE_ON, 0) < 0) {
fail:
close(rtc_fd);
return -1;
}
enable_sigio_timer(rtc_fd);
t->priv = (void *)(long)rtc_fd;
return 0;
}
static bool ga_open_pidfile(const char *pidfile)
{
int pidfd;
char pidstr[32];
pidfd = qemu_open(pidfile, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
if (pidfd == -1 || lockf(pidfd, F_TLOCK, 0)) {
g_critical("Cannot lock pid file, %s", strerror(errno));
if (pidfd != -1) {
close(pidfd);
}
return false;
}
if (ftruncate(pidfd, 0)) {
g_critical("Failed to truncate pid file");
goto fail;
}
snprintf(pidstr, sizeof(pidstr), "%d\n", getpid());
if (write(pidfd, pidstr, strlen(pidstr)) != strlen(pidstr)) {
g_critical("Failed to write pid file");
goto fail;
}
/* keep pidfile open & locked forever */
return true;
fail:
unlink(pidfile);
close(pidfd);
return false;
}
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
int len;
int fd;
fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1) {
return -1;
}
#ifndef __ANDROID__
if (lockf(fd, F_TLOCK, 0) == -1) {
close(fd);
return -1;
}
len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", getpid());
if (write(fd, buffer, len) != len) {
close(fd);
return -1;
}
#endif // __ANDROID__
/* keep pidfile open & locked forever */
return 0;
}
static int hdev_create(const char *filename, QEMUOptionParameter *options)
{
int fd;
int ret = 0;
struct stat stat_buf;
int64_t total_size = 0;
/* Read out options */
while (options && options->name) {
if (!strcmp(options->name, "size")) {
total_size = options->value.n / BDRV_SECTOR_SIZE;
}
options++;
}
fd = qemu_open(filename, O_WRONLY | O_BINARY);
if (fd < 0)
return -errno;
if (fstat(fd, &stat_buf) < 0)
ret = -errno;
else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode))
ret = -ENODEV;
else if (lseek(fd, 0, SEEK_END) < total_size * BDRV_SECTOR_SIZE)
ret = -ENOSPC;
qemu_close(fd);
return ret;
}
static int cdrom_probe_device(const char *filename)
{
int fd, ret;
int prio = 0;
struct stat st;
fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
goto out;
}
ret = fstat(fd, &st);
if (ret == -1 || !S_ISBLK(st.st_mode)) {
goto outc;
}
/* Attempt to detect via a CDROM specific ioctl */
ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
if (ret >= 0)
prio = 100;
outc:
qemu_close(fd);
out:
return prio;
}
static int raw_open_common(BlockDriverState *bs, QDict *options,
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
int fd, ret;
opts = qemu_opts_create_nofail(&raw_runtime_opts);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
qerror_report_err(local_err);
error_free(local_err);
ret = -EINVAL;
goto fail;
}
filename = qemu_opt_get(opts, "filename");
ret = raw_normalize_devicepath(&filename);
if (ret != 0) {
goto fail;
}
s->open_flags = open_flags;
raw_parse_flags(bdrv_flags, &s->open_flags);
s->fd = -1;
fd = qemu_open(filename, s->open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS) {
ret = -EACCES;
}
goto fail;
}
s->fd = fd;
#ifdef CONFIG_LINUX_AIO
if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
qemu_close(fd);
ret = -errno;
goto fail;
}
#endif
s->has_discard = 1;
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
}
#endif
ret = 0;
fail:
qemu_opts_del(opts);
return ret;
}
int qmp_chardev_open_file_source(char *src, int flags, Error **errp)
{
int fd = -1;
TFR(fd = qemu_open(src, flags, 0666));
if (fd == -1) {
error_setg_file_open(errp, errno, src);
}
return fd;
}
static void rng_random_opened(RngBackend *b, Error **errp)
{
RndRandom *s = RNG_RANDOM(b);
if (s->filename == NULL) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE,
"filename", "a valid filename");
} else {
s->fd = qemu_open(s->filename, O_RDONLY | O_NONBLOCK);
if (s->fd == -1) {
error_setg_file_open(errp, errno, s->filename);
}
}
}
/*
* Unless path or file descriptor set has been provided by user,
* determine the sysfs cancel file following kernel documentation
* in Documentation/ABI/stable/sysfs-class-tpm.
* From /dev/tpm0 create /sys/class/misc/tpm0/device/cancel
*/
static int tpm_passthrough_open_sysfs_cancel(TPMBackend *tb)
{
TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb);
int fd = -1;
char *dev;
char path[PATH_MAX];
if (tb->cancel_path) {
fd = qemu_open(tb->cancel_path, O_WRONLY);
if (fd < 0) {
error_report("Could not open TPM cancel path : %s",
strerror(errno));
}
return fd;
}
dev = strrchr(tpm_pt->tpm_dev, '/');
if (dev) {
dev++;
if (snprintf(path, sizeof(path), "/sys/class/misc/%s/device/cancel",
dev) < sizeof(path)) {
fd = qemu_open(path, O_WRONLY);
if (fd >= 0) {
tb->cancel_path = g_strdup(path);
} else {
error_report("tpm_passthrough: Could not open TPM cancel "
"path %s : %s", path, strerror(errno));
}
}
} else {
error_report("tpm_passthrough: Bad TPM device path %s",
tpm_pt->tpm_dev);
}
return fd;
}
static void floppy_eject(BlockDriverState *bs, bool eject_flag)
{
BDRVRawState *s = bs->opaque;
int fd;
if (s->fd >= 0) {
qemu_close(s->fd);
s->fd = -1;
}
fd = qemu_open(bs->filename, s->open_flags | O_NONBLOCK);
if (fd >= 0) {
if (ioctl(fd, FDEJECT, 0) < 0)
perror("FDEJECT");
qemu_close(fd);
}
}
static int tpm_passthrough_handle_device_opts(QemuOpts *opts, TPMBackend *tb)
{
TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb);
const char *value;
value = qemu_opt_get(opts, "cancel-path");
if (value) {
tb->cancel_path = g_strdup(value);
}
value = qemu_opt_get(opts, "path");
if (!value) {
value = TPM_PASSTHROUGH_DEFAULT_DEVICE;
}
tpm_pt->tpm_dev = g_strdup(value);
tb->path = g_strdup(tpm_pt->tpm_dev);
tpm_pt->tpm_fd = qemu_open(tpm_pt->tpm_dev, O_RDWR);
if (tpm_pt->tpm_fd < 0) {
error_report("Cannot access TPM device using '%s': %s\n",
tpm_pt->tpm_dev, strerror(errno));
goto err_free_parameters;
}
if (tpm_passthrough_test_tpmdev(tpm_pt->tpm_fd)) {
error_report("'%s' is not a TPM device.\n",
tpm_pt->tpm_dev);
goto err_close_tpmdev;
}
return 0;
err_close_tpmdev:
qemu_close(tpm_pt->tpm_fd);
tpm_pt->tpm_fd = -1;
err_free_parameters:
g_free(tb->path);
tb->path = NULL;
g_free(tpm_pt->tpm_dev);
tpm_pt->tpm_dev = NULL;
return 1;
}
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
int len;
#ifndef _WIN32
int fd;
fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1)
return -1;
if (lockf(fd, F_TLOCK, 0) == -1)
return -1;
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
if (write(fd, buffer, len) != len)
return -1;
#else
HANDLE file;
DWORD flags;
OVERLAPPED overlap;
BOOL ret;
/* Open for writing with no sharing. */
file = CreateFile(filename, GENERIC_WRITE, 0, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE)
return -1;
flags = LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY;
overlap.hEvent = 0;
/* Lock 1 byte. */
ret = LockFileEx(file, flags, 0, 0, 1, &overlap);
if (ret == 0)
return -1;
/* Write PID to file. */
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
&overlap, NULL);
if (ret == 0)
return -1;
#endif
return 0;
}
static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
#if defined(__APPLE__) && defined(__MACH__)
if (strstart(filename, "/dev/cdrom", NULL)) {
kern_return_t kernResult;
io_iterator_t mediaIterator;
char bsdPath[ MAXPATHLEN ];
int fd;
kernResult = FindEjectableCDMedia( &mediaIterator );
kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
if ( bsdPath[ 0 ] != '\0' ) {
strcat(bsdPath,"s0");
/* some CDs don't have a partition 0 */
fd = qemu_open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
if (fd < 0) {
bsdPath[strlen(bsdPath)-1] = '1';
} else {
qemu_close(fd);
}
filename = bsdPath;
}
if ( mediaIterator )
IOObjectRelease( mediaIterator );
}
#endif
s->type = FTYPE_FILE;
#if defined(__linux__)
{
char resolved_path[ MAXPATHLEN ], *temp;
temp = realpath(filename, resolved_path);
if (temp && strstart(temp, "/dev/sg", NULL)) {
bs->sg = 1;
}
}
#endif
return raw_open_common(bs, filename, flags, 0);
}
/* Note: we do not have a reliable method to detect if the floppy is
present. The current method is to try to open the floppy at every
I/O and to keep it opened during a few hundreds of ms. */
static int fd_open(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int last_media_present;
if (s->type != FTYPE_FD)
return 0;
last_media_present = (s->fd >= 0);
if (s->fd >= 0 &&
(get_clock() - s->fd_open_time) >= FD_OPEN_TIMEOUT) {
qemu_close(s->fd);
s->fd = -1;
#ifdef DEBUG_FLOPPY
printf("Floppy closed\n");
#endif
}
if (s->fd < 0) {
if (s->fd_got_error &&
(get_clock() - s->fd_error_time) < FD_OPEN_TIMEOUT) {
#ifdef DEBUG_FLOPPY
printf("No floppy (open delayed)\n");
#endif
return -EIO;
}
s->fd = qemu_open(bs->filename, s->open_flags & ~O_NONBLOCK);
if (s->fd < 0) {
s->fd_error_time = get_clock();
s->fd_got_error = 1;
if (last_media_present)
s->fd_media_changed = 1;
#ifdef DEBUG_FLOPPY
printf("No floppy\n");
#endif
return -EIO;
}
#ifdef DEBUG_FLOPPY
printf("Floppy opened\n");
#endif
}
if (!last_media_present)
s->fd_media_changed = 1;
s->fd_open_time = get_clock();
s->fd_got_error = 0;
return 0;
}
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
int len;
int fd;
fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1) {
return -1;
}
if (lockf(fd, F_TLOCK, 0) == -1) {
return -1;
}
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
if (write(fd, buffer, len) != len) {
return -1;
}
return 0;
}
static int hpet_start_timer(struct qemu_alarm_timer *t)
{
struct hpet_info info;
int r, fd;
fd = qemu_open("/dev/hpet", O_RDONLY);
if (fd < 0)
return -1;
/* Set frequency */
r = ioctl(fd, HPET_IRQFREQ, RTC_FREQ);
if (r < 0) {
fprintf(stderr, "Could not configure '/dev/hpet' to have a 1024Hz timer. This is not a fatal\n"
"error, but for better emulation accuracy type:\n"
"'echo 1024 > /proc/sys/dev/hpet/max-user-freq' as root.\n");
goto fail;
}
/* Check capabilities */
r = ioctl(fd, HPET_INFO, &info);
if (r < 0)
goto fail;
/* Enable periodic mode */
r = ioctl(fd, HPET_EPI, 0);
if (info.hi_flags && (r < 0))
goto fail;
/* Enable interrupt */
r = ioctl(fd, HPET_IE_ON, 0);
if (r < 0)
goto fail;
enable_sigio_timer(fd);
t->priv = (void *)(long)fd;
return 0;
fail:
close(fd);
return -1;
}
static int raw_open_common(BlockDriverState *bs, const char *filename,
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
int fd, ret;
ret = raw_normalize_devicepath(&filename);
if (ret != 0) {
return ret;
}
s->open_flags = open_flags;
raw_parse_flags(bdrv_flags, &s->open_flags);
s->fd = -1;
fd = qemu_open(filename, s->open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
ret = -EACCES;
return ret;
}
s->fd = fd;
#ifdef CONFIG_LINUX_AIO
if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
qemu_close(fd);
return -errno;
}
#endif
s->has_discard = 1;
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
}
#endif
return 0;
}
void os_setup_post(void)
{
int fd = 0;
if (daemonize) {
if (chdir("/")) {
error_report("not able to chdir to /: %s", strerror(errno));
exit(1);
}
TFR(fd = qemu_open("/dev/null", O_RDWR));
if (fd == -1) {
exit(1);
}
}
change_root();
change_process_uid();
if (daemonize) {
uint8_t status = 0;
ssize_t len;
dup2(fd, 0);
dup2(fd, 1);
/* In case -D is given do not redirect stderr to /dev/null */
if (!qemu_logfile) {
dup2(fd, 2);
}
close(fd);
do {
len = write(daemon_pipe, &status, 1);
} while (len < 0 && errno == EINTR);
if (len != 1) {
exit(1);
}
}
}
static int cdrom_reopen(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
int fd;
/*
* Force reread of possibly changed/newly loaded disc,
* FreeBSD seems to not notice sometimes...
*/
if (s->fd >= 0)
qemu_close(s->fd);
fd = qemu_open(bs->filename, s->open_flags, 0644);
if (fd < 0) {
s->fd = -1;
return -EIO;
}
s->fd = fd;
/* make sure the door isn't locked at this time */
ioctl(s->fd, CDIOCALLOW);
return 0;
}
static int kvm_vm_clone(KVMState *s)
{
struct stat stat;
int fd;
if (fstat(s->fd, &stat) != 0) {
return -errno;
}
fd = qemu_open("/dev/kvm", O_RDWR);
if (fd == -1) {
return -errno;
}
if (ioctl(fd, KVM_CLONE, stat.st_rdev) == -1) {
close(fd);
return -errno;
}
return fd;
}
void os_setup_post(void)
{
int fd = 0;
if (daemonize) {
uint8_t status = 0;
ssize_t len;
again1:
len = write(fds[1], &status, 1);
LOGV("%s:%s=%d, write(), len = %d", __FILE__, __func__, status, len);
if (len == -1 && (errno == EINTR))
goto again1;
if (len != 1)
exit(1);
if (chdir("/")) {
perror("not able to chdir to /");
exit(1);
}
TFR(fd = qemu_open("/dev/null", O_RDWR));
if (fd == -1)
exit(1);
}
change_root();
change_process_uid();
if (daemonize) {
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
}
}
int qemu_create_pidfile(const char *filename)
{
char buffer[128];
int len;
#ifndef _WIN32
int fd;
fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
if (fd == -1)
return -1;
if (lockf(fd, F_TLOCK, 0) == -1)
return -1;
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
if (write(fd, buffer, len) != len)
return -1;
#else
HANDLE file;
OVERLAPPED overlap;
BOOL ret;
memset(&overlap, 0, sizeof(overlap));
file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (file == INVALID_HANDLE_VALUE)
return -1;
len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
&overlap, NULL);
if (ret == 0)
return -1;
#endif
return 0;
}
/*
* A basic test of a TPM device. We expect a well formatted response header
* (error response is fine) within one second.
*/
static int tpm_passthrough_test_tpmdev(int fd)
{
struct tpm_req_hdr req = {
.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
.len = cpu_to_be32(sizeof(req)),
.ordinal = cpu_to_be32(TPM_ORD_GetTicks),
};
struct tpm_resp_hdr *resp;
fd_set readfds;
int n;
struct timeval tv = {
.tv_sec = 1,
.tv_usec = 0,
};
unsigned char buf[1024];
n = write(fd, &req, sizeof(req));
if (n < 0) {
return errno;
}
if (n != sizeof(req)) {
return EFAULT;
}
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
/* wait for a second */
n = select(fd + 1, &readfds, NULL, NULL, &tv);
if (n != 1) {
return errno;
}
n = read(fd, &buf, sizeof(buf));
if (n < sizeof(struct tpm_resp_hdr)) {
return EFAULT;
}
resp = (struct tpm_resp_hdr *)buf;
/* check the header */
if (be16_to_cpu(resp->tag) != TPM_TAG_RSP_COMMAND ||
be32_to_cpu(resp->len) != n) {
return EBADMSG;
}
return 0;
}
/*
* Check whether the given base path, e.g., /sys/class/misc/tpm0/device,
* is the sysfs directory of a TPM. A TPM sysfs directory should be uniquely
* recognizable by the file entries 'pcrs' and 'cancel'.
* Upon success 'true' is returned and the basebath buffer has '/cancel'
* appended.
*/
static bool tpm_passthrough_check_sysfs_cancel(char *basepath, size_t bufsz)
{
char path[PATH_MAX];
struct stat statbuf;
snprintf(path, sizeof(path), "%s/pcrs", basepath);
if (stat(path, &statbuf) == -1 || !S_ISREG(statbuf.st_mode)) {
return false;
}
snprintf(path, sizeof(path), "%s/cancel", basepath);
if (stat(path, &statbuf) == -1 || !S_ISREG(statbuf.st_mode)) {
return false;
}
strncpy(basepath, path, bufsz);
return true;
}
/*
* Unless path or file descriptor set has been provided by user,
* determine the sysfs cancel file following kernel documentation
* in Documentation/ABI/stable/sysfs-class-tpm.
*/
static int tpm_passthrough_open_sysfs_cancel(TPMBackend *tb)
{
int fd = -1;
unsigned int idx;
DIR *pnp_dir;
char path[PATH_MAX];
struct dirent entry, *result;
int len;
if (tb->cancel_path) {
fd = qemu_open(tb->cancel_path, O_WRONLY);
if (fd < 0) {
error_report("Could not open TPM cancel path : %s",
strerror(errno));
}
return fd;
}
snprintf(path, sizeof(path), "/sys/class/misc");
pnp_dir = opendir(path);
if (pnp_dir != NULL) {
while (readdir_r(pnp_dir, &entry, &result) == 0 &&
result != NULL) {
/*
* only allow /sys/class/misc/tpm%u type of paths
*/
if (sscanf(entry.d_name, "tpm%u%n", &idx, &len) < 1 ||
len <= strlen("tpm") ||
len != strlen(entry.d_name)) {
continue;
}
snprintf(path, sizeof(path), "/sys/class/misc/%s/device",
entry.d_name);
if (!tpm_passthrough_check_sysfs_cancel(path, sizeof(path))) {
continue;
}
fd = qemu_open(path, O_WRONLY);
break;
}
closedir(pnp_dir);
}
if (fd >= 0) {
tb->cancel_path = g_strdup(path);
}
return fd;
}
static gboolean ga_channel_open(GAChannel *c, const gchar *path, GAChannelMethod method)
{
int ret;
c->method = method;
switch (c->method) {
case GA_CHANNEL_VIRTIO_SERIAL: {
int fd = qemu_open(path, O_RDWR | O_NONBLOCK
#ifndef CONFIG_SOLARIS
| O_ASYNC
#endif
);
if (fd == -1) {
g_critical("error opening channel: %s", strerror(errno));
return false;
}
#ifdef CONFIG_SOLARIS
ret = ioctl(fd, I_SETSIG, S_OUTPUT | S_INPUT | S_HIPRI);
if (ret == -1) {
g_critical("error setting event mask for channel: %s",
strerror(errno));
close(fd);
return false;
}
#endif
ret = ga_channel_client_add(c, fd);
if (ret) {
g_critical("error adding channel to main loop");
close(fd);
return false;
}
break;
}
case GA_CHANNEL_ISA_SERIAL: {
struct termios tio;
int fd = qemu_open(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
if (fd == -1) {
g_critical("error opening channel: %s", strerror(errno));
return false;
}
tcgetattr(fd, &tio);
/* set up serial port for non-canonical, dumb byte streaming */
tio.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | ISTRIP |
INLCR | IGNCR | ICRNL | IXON | IXOFF | IXANY |
IMAXBEL);
tio.c_oflag = 0;
tio.c_lflag = 0;
tio.c_cflag |= GA_CHANNEL_BAUDRATE_DEFAULT;
/* 1 available byte min or reads will block (we'll set non-blocking
* elsewhere, else we have to deal with read()=0 instead)
*/
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 0;
/* flush everything waiting for read/xmit, it's garbage at this point */
tcflush(fd, TCIFLUSH);
tcsetattr(fd, TCSANOW, &tio);
ret = ga_channel_client_add(c, fd);
if (ret) {
g_critical("error adding channel to main loop");
close(fd);
return false;
}
break;
}
case GA_CHANNEL_UNIX_LISTEN: {
Error *local_err = NULL;
int fd = unix_listen(path, NULL, strlen(path), &local_err);
if (local_err != NULL) {
g_critical("%s", error_get_pretty(local_err));
error_free(local_err);
return false;
}
ga_channel_listen_add(c, fd, true);
break;
}
default:
g_critical("error binding/listening to specified socket");
return false;
}
return true;
}
/**
* \ingroup imglib
* Opens one or more disk image files so that they can be read. If a file format
* type is specified, this function will call the specific routine to open the file.
* Otherwise, it will detect the type (it will default to raw if no specific type can
* be detected). This function must be called before a disk image can be read from.
* Note that the data type used to store the image paths is a TSK_TCHAR, which changes
* depending on a Unix or Windows build. If you will always have UTF8, then consider
* using tsk_img_open_utf8().
*
* @param num_img The number of images to open (will be > 1 for split images).
* @param images The path to the image files (the number of files must
* be equal to num_img and they must be in a sorted order)
* @param type The disk image type (can be autodetection)
* @param a_ssize Size of device sector in bytes (or 0 for default)
*
* @return Pointer to TSK_IMG_INFO or NULL on error
*/
TSK_IMG_INFO *
tsk_img_open(int num_img,
const TSK_TCHAR * const images[], TSK_IMG_TYPE_ENUM type,
unsigned int a_ssize)
{
TSK_IMG_INFO *img_info = NULL;
// Get rid of any old error messages laying around
tsk_error_reset();
if ((num_img == 0) || (images[0] == NULL)) {
tsk_error_reset();
tsk_errno = TSK_ERR_IMG_NOFILE;
snprintf(tsk_errstr, TSK_ERRSTR_L, "tsk_img_open");
return NULL;
}
if ((a_ssize > 0) && (a_ssize < 512)) {
tsk_error_reset();
tsk_errno = TSK_ERR_IMG_ARG;
snprintf(tsk_errstr, TSK_ERRSTR_L, "sector size is less than 512 bytes (%d)", a_ssize);
return NULL;
}
if ((a_ssize % 512) != 0) {
tsk_error_reset();
tsk_errno = TSK_ERR_IMG_ARG;
snprintf(tsk_errstr, TSK_ERRSTR_L, "sector size is not a multiple of 512 (%d)", a_ssize);
return NULL;
}
if (tsk_verbose)
TFPRINTF(stderr,
_TSK_T("tsk_img_open: Type: %d NumImg: %d Img1: %s\n"),
type, num_img, images[0]);
/* If no type is given, then we use the autodetection methods
* In case the image file matches the signatures of multiple formats,
* we try all of the embedded formats
*/
if (type == TSK_IMG_TYPE_DETECT) {
TSK_IMG_INFO *img_set = NULL;
#if HAVE_LIBAFFLIB || HAVE_LIBEWF
char *set = NULL;
#endif
struct STAT_STR stat_buf;
// we rely on tsk_errno, so make sure it is 0
tsk_error_reset();
/* Try the non-raw formats first */
#if HAVE_LIBAFFLIB
if ((img_info = aff_open(images, a_ssize)) != NULL) {
/* we don't allow the "ANY" when autodetect is used because
* we only want to detect the tested formats. */
if (img_info->itype == TSK_IMG_TYPE_AFF_ANY) {
img_info->close(img_info);
}
else {
set = "AFF";
img_set = img_info;
}
}
else {
// If AFF is otherwise happy except for a password, stop trying to guess
if (tsk_errno == TSK_ERR_IMG_PASSWD) {
return NULL;
}
tsk_error_reset();
}
#endif
#if HAVE_LIBEWF
if ((img_info = ewf_open(num_img, images, a_ssize)) != NULL) {
if (set == NULL) {
set = "EWF";
img_set = img_info;
}
else {
img_set->close(img_set);
img_info->close(img_info);
tsk_error_reset();
tsk_errno = TSK_ERR_IMG_UNKTYPE;
snprintf(tsk_errstr, TSK_ERRSTR_L, "EWF or %s", set);
return NULL;
}
}
else {
tsk_error_reset();
}
#endif
// if any of the non-raw formats were detected, then use it.
if (img_set != NULL)
return img_set;
/* We'll use the raw format */
if (num_img == 1) {
if ((img_info = raw_open(images[0], a_ssize)) != NULL) {
return img_info;
}
else if (tsk_errno) {
return NULL;
}
}
else {
if ((img_info = split_open(num_img, images, a_ssize)) != NULL) {
return img_info;
}
else if (tsk_errno) {
return NULL;
}
}
/* To improve the error message, verify the file can be read. */
if (TSTAT(images[0], &stat_buf) < 0) {
// special case to handle windows objects
#if defined(TSK_WIN32) || defined(__CYGWIN__)
if (TSTRNCMP(_TSK_T("\\\\.\\"), images[0], 4) == 0) {
if (tsk_verbose)
TFPRINTF(stderr,
_TSK_T
("tsk_img_open: Ignoring stat error because of windows object: %s\n"),
images[0]);
}
else {
#endif
tsk_error_reset();
tsk_errno = TSK_ERR_IMG_STAT;
snprintf(tsk_errstr, TSK_ERRSTR_L, "%" PRIttocTSK " : %s",
images[0], strerror(errno));
return NULL;
#if defined(TSK_WIN32) || defined(__CYGWIN__)
}
#endif
}
tsk_errno = TSK_ERR_IMG_UNKTYPE;
tsk_errstr[0] = '\0';
tsk_errstr2[0] = '\0';
return NULL;
}
/*
* Type values
* Make a local copy that we can modify the string as we parse it
*/
switch (type) {
case TSK_IMG_TYPE_RAW_SING:
/* If we have more than one image name, and raw was the only
* type given, then use split */
if (num_img > 1)
img_info = split_open(num_img, images, a_ssize);
else
img_info = raw_open(images[0], a_ssize);
break;
case TSK_IMG_TYPE_RAW_SPLIT:
/* If only one image file is given, and only one type was
* given then use raw */
if (num_img == 1)
img_info = raw_open(images[0], a_ssize);
else
img_info = split_open(num_img, images, a_ssize);
break;
#if HAVE_LIBAFFLIB
case TSK_IMG_TYPE_AFF_AFF:
case TSK_IMG_TYPE_AFF_AFD:
case TSK_IMG_TYPE_AFF_AFM:
case TSK_IMG_TYPE_AFF_ANY:
img_info = aff_open(images, a_ssize);
break;
#endif
#if HAVE_LIBEWF
case TSK_IMG_TYPE_EWF_EWF:
img_info = ewf_open(num_img, images, a_ssize);
break;
#endif
case TSK_IMG_TYPE_QEMU:
img_info = qemu_open(images[0], a_ssize);
break;
default:
tsk_error_reset();
tsk_errno = TSK_ERR_IMG_UNSUPTYPE;
snprintf(tsk_errstr, TSK_ERRSTR_L, "%d", type);
return NULL;
}
return img_info;
}
static int raw_open_common(BlockDriverState *bs, const char *filename,
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
int fd, ret;
ret = raw_normalize_devicepath(&filename);
if (ret != 0) {
return ret;
}
s->open_flags = open_flags | O_BINARY;
s->open_flags &= ~O_ACCMODE;
if (bdrv_flags & BDRV_O_RDWR) {
s->open_flags |= O_RDWR;
} else {
s->open_flags |= O_RDONLY;
}
/* Use O_DSYNC for write-through caching, no flags for write-back caching,
* and O_DIRECT for no caching. */
if ((bdrv_flags & BDRV_O_NOCACHE))
s->open_flags |= O_DIRECT;
if (!(bdrv_flags & BDRV_O_CACHE_WB))
s->open_flags |= O_DSYNC;
s->fd = -1;
fd = qemu_open(filename, s->open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
ret = -EACCES;
return ret;
}
s->fd = fd;
s->aligned_buf = NULL;
if ((bdrv_flags & BDRV_O_NOCACHE)) {
/*
* Allocate a buffer for read/modify/write cycles. Chose the size
* pessimistically as we don't know the block size yet.
*/
s->aligned_buf_size = 32 * MAX_BLOCKSIZE;
s->aligned_buf = qemu_memalign(MAX_BLOCKSIZE, s->aligned_buf_size);
if (s->aligned_buf == NULL) {
goto out_close;
}
}
#ifdef CONFIG_LINUX_AIO
if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
(BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
/* We're falling back to POSIX AIO in some cases */
paio_init();
s->aio_ctx = laio_init();
if (!s->aio_ctx) {
goto out_free_buf;
}
s->use_aio = 1;
} else
#endif
{
if (paio_init() < 0) {
goto out_free_buf;
}
#ifdef CONFIG_LINUX_AIO
s->use_aio = 0;
#endif
}
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
}
#endif
return 0;
out_free_buf:
qemu_vfree(s->aligned_buf);
out_close:
close(fd);
return -errno;
}
