static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
{
IscsiLun *iscsilun = bs->opaque;
int status;
switch (req) {
case SG_GET_VERSION_NUM:
*(int *)buf = 30000;
break;
case SG_GET_SCSI_ID:
((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
break;
case SG_IO:
status = -EINPROGRESS;
iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status);
while (status == -EINPROGRESS) {
qemu_aio_wait();
}
return 0;
default:
return -1;
}
return 0;
}
static int do_co_write_zeroes(int64_t offset, int count, int *total)
{
Coroutine *co;
CoWriteZeroes data = {
.offset = offset,
.count = count,
.total = total,
.done = false,
};
co = qemu_coroutine_create(co_write_zeroes_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
qemu_aio_wait();
}
if (data.ret < 0) {
return data.ret;
} else {
return 1;
}
}
static int do_write_compressed(char *buf, int64_t offset, int count, int *total)
{
int ret;
ret = bdrv_write_compressed(bs, offset >> 9, (uint8_t *)buf, count >> 9);
if (ret < 0) {
return ret;
}
*total = count;
return 1;
}
static int do_co_write_zeroes(int64_t offset, int count, int *total)
{
Coroutine *co;
CoWriteZeroes data = {
.offset = offset,
.count = count,
.total = total,
.done = false,
};
co = qemu_coroutine_create(co_write_zeroes_entry);
qemu_coroutine_enter(co, &data);
while (!data.done) {
qemu_aio_wait();
}
if (data.ret < 0) {
return data.ret;
} else {
return 1;
}
}
static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
{
*total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
if (*total < 0) {
return *total;
}
return 1;
}
static int wait_break_f(int argc, char **argv)
{
while (!bdrv_debug_is_suspended(bs, argv[1])) {
qemu_aio_wait();
}
return 0;
}
static void qemu_gluster_aio_cancel(BlockDriverAIOCB *blockacb)
{
GlusterAIOCB *acb = (GlusterAIOCB *)blockacb;
bool finished = false;
acb->finished = &finished;
while (!finished) {
qemu_aio_wait();
}
}
int qed_read_l2_table_sync(BDRVQEDState *s, QEDRequest *request, uint64_t offset)
{
int ret = -EINPROGRESS;
qed_read_l2_table(s, request, offset, qed_sync_cb, &ret);
while (ret == -EINPROGRESS) {
qemu_aio_wait();
}
return ret;
}
static void blkverify_aio_cancel(BlockDriverAIOCB *blockacb)
{
BlkverifyAIOCB *acb = (BlkverifyAIOCB *)blockacb;
bool finished = false;
/* Wait until request completes, invokes its callback, and frees itself */
acb->finished = &finished;
while (!finished) {
qemu_aio_wait();
}
}
static void qed_aio_cancel(BlockDriverAIOCB *blockacb)
{
QEDAIOCB *acb = (QEDAIOCB *)blockacb;
bool finished = false;
/* Wait for the request to finish */
acb->finished = &finished;
while (!finished) {
qemu_aio_wait();
}
}
/*
* Cancel aio. Since we don't reference acb in a non qemu threads,
* it is safe to access it here.
*/
static void qemu_rbd_aio_cancel(BlockDriverAIOCB *blockacb)
{
RBDAIOCB *acb = (RBDAIOCB *) blockacb;
acb->cancelled = 1;
while (acb->status == -EINPROGRESS) {
qemu_aio_wait();
}
qemu_aio_release(acb);
}
int qed_read_l1_table_sync(BDRVQEDState *s)
{
int ret = -EINPROGRESS;
qed_read_table(s, s->header.l1_table_offset,
s->l1_table, qed_sync_cb, &ret);
while (ret == -EINPROGRESS) {
qemu_aio_wait();
}
return ret;
}
int qed_write_l2_table_sync(BDRVQEDState *s, QEDRequest *request,
unsigned int index, unsigned int n, bool flush)
{
int ret = -EINPROGRESS;
qed_write_l2_table(s, request, index, n, flush, qed_sync_cb, &ret);
while (ret == -EINPROGRESS) {
qemu_aio_wait();
}
return ret;
}
int qed_write_l1_table_sync(BDRVQEDState *s, unsigned int index,
unsigned int n)
{
int ret = -EINPROGRESS;
qed_write_l1_table(s, index, n, qed_sync_cb, &ret);
while (ret == -EINPROGRESS) {
qemu_aio_wait();
}
return ret;
}
static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
{
int async_ret = NOT_DONE;
bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
aio_rw_done, &async_ret);
while (async_ret == NOT_DONE) {
qemu_aio_wait();
}
*total = qiov->size;
return async_ret < 0 ? async_ret : 1;
}
static int do_aio_multiwrite(BlockRequest* reqs, int num_reqs, int *total)
{
int i, ret;
struct multiwrite_async_ret async_ret = {
.num_done = 0,
.error = 0,
};
*total = 0;
for (i = 0; i < num_reqs; i++) {
reqs[i].cb = multiwrite_cb;
reqs[i].opaque = &async_ret;
*total += reqs[i].qiov->size;
}
ret = bdrv_aio_multiwrite(bs, reqs, num_reqs);
if (ret < 0) {
return ret;
}
while (async_ret.num_done < num_reqs) {
qemu_aio_wait();
}
return async_ret.error < 0 ? async_ret.error : 1;
}
static void
read_help(void)
{
printf(
"\n"
" reads a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
" -b, -- read from the VM state rather than the virtual disk\n"
" -C, -- report statistics in a machine parsable format\n"
" -l, -- length for pattern verification (only with -P)\n"
" -p, -- use bdrv_pread to read the file\n"
" -P, -- use a pattern to verify read data\n"
" -q, -- quite mode, do not show I/O statistics\n"
" -s, -- start offset for pattern verification (only with -P)\n"
" -v, -- dump buffer to standard output\n"
"\n");
}
static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
{
BlockDriverAIOCB *acb;
int async_ret = NOT_DONE;
acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
aio_rw_done, &async_ret);
if (!acb)
return -EIO;
while (async_ret == NOT_DONE)
qemu_aio_wait();
*total = qiov->size;
return async_ret < 0 ? async_ret : 1;
}
static void
iscsi_aio_cancel(BlockDriverAIOCB *blockacb)
{
IscsiAIOCB *acb = (IscsiAIOCB *)blockacb;
IscsiLun *iscsilun = acb->iscsilun;
if (acb->status != -EINPROGRESS) {
return;
}
acb->canceled = 1;
/* send a task mgmt call to the target to cancel the task on the target */
iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task,
iscsi_abort_task_cb, acb);
while (acb->status == -EINPROGRESS) {
qemu_aio_wait();
}
}
int block_job_cancel_sync(BlockJob *job)
{
struct BlockCancelData data;
BlockDriverState *bs = job->bs;
assert(bs->job == job);
/* Set up our own callback to store the result and chain to
* the original callback.
*/
data.job = job;
data.cb = job->cb;
data.opaque = job->opaque;
data.ret = -EINPROGRESS;
job->cb = block_job_cancel_cb;
job->opaque = &data;
block_job_cancel(job);
while (data.ret == -EINPROGRESS) {
qemu_aio_wait();
}
return (data.cancelled && data.ret == 0) ? -ECANCELED : data.ret;
}
/* A non-blocking poll of the main AIO context (we cannot use aio_poll
* because we do not know the AioContext).
*/
static void qemu_aio_wait_nonblocking(void)
{
qemu_notify_event();
qemu_aio_wait();
}
/* Wait until all aio and bh activity has finished */
static void qemu_aio_wait_all(void)
{
while (qemu_aio_wait()) {
/* Do nothing */
}
}
/*
* We support iscsi url's on the form
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
*/
static int iscsi_open(BlockDriverState *bs, const char *filename, int flags)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = NULL;
struct iscsi_url *iscsi_url = NULL;
struct IscsiTask task;
char *initiator_name = NULL;
int ret;
if ((BDRV_SECTOR_SIZE % 512) != 0) {
error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. "
"BDRV_SECTOR_SIZE(%lld) is not a multiple "
"of 512", BDRV_SECTOR_SIZE);
return -EINVAL;
}
iscsi_url = iscsi_parse_full_url(iscsi, filename);
if (iscsi_url == NULL) {
error_report("Failed to parse URL : %s %s", filename,
iscsi_get_error(iscsi));
ret = -EINVAL;
goto failed;
}
memset(iscsilun, 0, sizeof(IscsiLun));
initiator_name = parse_initiator_name(iscsi_url->target);
iscsi = iscsi_create_context(initiator_name);
if (iscsi == NULL) {
error_report("iSCSI: Failed to create iSCSI context.");
ret = -ENOMEM;
goto failed;
}
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
error_report("iSCSI: Failed to set target name.");
ret = -EINVAL;
goto failed;
}
if (iscsi_url->user != NULL) {
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user,
iscsi_url->passwd);
if (ret != 0) {
error_report("Failed to set initiator username and password");
ret = -EINVAL;
goto failed;
}
}
/* check if we got CHAP username/password via the options */
if (parse_chap(iscsi, iscsi_url->target) != 0) {
error_report("iSCSI: Failed to set CHAP user/password");
ret = -EINVAL;
goto failed;
}
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
error_report("iSCSI: Failed to set session type to normal.");
ret = -EINVAL;
goto failed;
}
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
/* check if we got HEADER_DIGEST via the options */
parse_header_digest(iscsi, iscsi_url->target);
task.iscsilun = iscsilun;
task.status = 0;
task.complete = 0;
task.bs = bs;
iscsilun->iscsi = iscsi;
iscsilun->lun = iscsi_url->lun;
if (iscsi_full_connect_async(iscsi, iscsi_url->portal, iscsi_url->lun,
iscsi_connect_cb, &task)
!= 0) {
error_report("iSCSI: Failed to start async connect.");
ret = -EINVAL;
goto failed;
}
while (!task.complete) {
iscsi_set_events(iscsilun);
qemu_aio_wait();
}
if (task.status != 0) {
error_report("iSCSI: Failed to connect to LUN : %s",
iscsi_get_error(iscsi));
ret = -EINVAL;
goto failed;
}
if (iscsi_url != NULL) {
iscsi_destroy_url(iscsi_url);
}
return 0;
failed:
if (initiator_name != NULL) {
g_free(initiator_name);
}
if (iscsi_url != NULL) {
iscsi_destroy_url(iscsi_url);
}
if (iscsi != NULL) {
iscsi_destroy_context(iscsi);
}
memset(iscsilun, 0, sizeof(IscsiLun));
return ret;
}
void command_loop(void)
{
int c, i, j = 0, done = 0, fetchable = 0, prompted = 0;
char *input;
char **v;
const cmdinfo_t *ct;
for (i = 0; !done && i < ncmdline; i++) {
input = strdup(cmdline[i]);
if (!input) {
fprintf(stderr, _("cannot strdup command '%s': %s\n"),
cmdline[i], strerror(errno));
exit(1);
}
v = breakline(input, &c);
if (c) {
ct = find_command(v[0]);
if (ct) {
if (ct->flags & CMD_FLAG_GLOBAL) {
done = command(ct, c, v);
} else {
j = 0;
while (!done && (j = args_command(j))) {
done = command(ct, c, v);
}
}
} else {
fprintf(stderr, _("command \"%s\" not found\n"), v[0]);
}
}
doneline(input, v);
}
if (cmdline) {
g_free(cmdline);
return;
}
while (!done) {
if (!prompted) {
printf("%s", get_prompt());
fflush(stdout);
qemu_aio_set_fd_handler(STDIN_FILENO, prep_fetchline, NULL, NULL,
NULL, &fetchable);
prompted = 1;
}
qemu_aio_wait();
if (!fetchable) {
continue;
}
input = fetchline();
if (input == NULL) {
break;
}
v = breakline(input, &c);
if (c) {
ct = find_command(v[0]);
if (ct) {
done = command(ct, c, v);
} else {
fprintf(stderr, _("command \"%s\" not found\n"), v[0]);
}
}
doneline(input, v);
prompted = 0;
fetchable = 0;
}
qemu_aio_set_fd_handler(STDIN_FILENO, NULL, NULL, NULL, NULL, NULL);
}
