/* compatibility wrapper */
int unix_listen(const char *str, char *ostr, int olen, Error **errp)
{
QemuOpts *opts;
char *path, *optstr;
int sock, len;
opts = qemu_opts_create_nofail(&dummy_opts);
optstr = strchr(str, ',');
if (optstr) {
len = optstr - str;
if (len) {
path = g_malloc(len+1);
snprintf(path, len+1, "%.*s", len, str);
qemu_opt_set(opts, "path", path);
g_free(path);
}
} else {
qemu_opt_set(opts, "path", str);
}
sock = unix_listen_opts(opts, errp);
if (sock != -1 && ostr)
snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
qemu_opts_del(opts);
return sock;
}
int socket_connect(SocketAddress *addr, Error **errp,
NonBlockingConnectHandler *callback, void *opaque)
{
QemuOpts *opts;
int fd;
opts = qemu_opts_create_nofail(&dummy_opts);
switch (addr->kind) {
case SOCKET_ADDRESS_KIND_INET:
inet_addr_to_opts(opts, addr->inet);
fd = inet_connect_opts(opts, errp, callback, opaque);
break;
case SOCKET_ADDRESS_KIND_UNIX:
qemu_opt_set(opts, "path", addr->q_unix->path);
fd = unix_connect_opts(opts, errp, callback, opaque);
break;
case SOCKET_ADDRESS_KIND_FD:
fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
if (callback) {
callback(fd, opaque);
}
break;
default:
abort();
}
qemu_opts_del(opts);
return fd;
}
int inet_listen(const char *str, char *ostr, int olen,
int socktype, int port_offset, Error **errp)
{
QemuOpts *opts;
char *optstr;
int sock = -1;
InetSocketAddress *addr;
addr = inet_parse(str, errp);
if (addr != NULL) {
opts = qemu_opts_create_nofail(&dummy_opts);
inet_addr_to_opts(opts, addr);
qapi_free_InetSocketAddress(addr);
sock = inet_listen_opts(opts, port_offset, errp);
if (sock != -1 && ostr) {
optstr = strchr(str, ',');
if (qemu_opt_get_bool(opts, "ipv6", 0)) {
snprintf(ostr, olen, "[%s]:%s%s",
qemu_opt_get(opts, "host"),
qemu_opt_get(opts, "port"),
optstr ? optstr : "");
} else {
snprintf(ostr, olen, "%s:%s%s",
qemu_opt_get(opts, "host"),
qemu_opt_get(opts, "port"),
optstr ? optstr : "");
}
}
qemu_opts_del(opts);
}
return sock;
}
int socket_listen(SocketAddress *addr, Error **errp)
{
QemuOpts *opts;
int fd;
opts = qemu_opts_create_nofail(&dummy_opts);
switch (addr->kind) {
case SOCKET_ADDRESS_KIND_INET:
inet_addr_to_opts(opts, addr->inet);
fd = inet_listen_opts(opts, 0, errp);
break;
case SOCKET_ADDRESS_KIND_UNIX:
qemu_opt_set(opts, "path", addr->q_unix->path);
fd = unix_listen_opts(opts, errp);
break;
case SOCKET_ADDRESS_KIND_FD:
fd = monitor_get_fd(cur_mon, addr->fd->str, errp);
break;
default:
abort();
}
qemu_opts_del(opts);
return fd;
}
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 unix_connect(const char *path, Error **errp)
{
QemuOpts *opts;
int sock;
opts = qemu_opts_create_nofail(&dummy_opts);
qemu_opt_set(opts, "path", path);
sock = unix_connect_opts(opts, errp, NULL, NULL);
qemu_opts_del(opts);
return sock;
}
int unix_nonblocking_connect(const char *path,
NonBlockingConnectHandler *callback,
void *opaque, Error **errp)
{
QemuOpts *opts;
int sock = -1;
g_assert(callback != NULL);
opts = qemu_opts_create_nofail(&dummy_opts);
qemu_opt_set(opts, "path", path);
sock = unix_connect_opts(opts, errp, callback, opaque);
qemu_opts_del(opts);
return sock;
}
static int blkverify_open(BlockDriverState *bs, QDict *options, int flags)
{
BDRVBlkverifyState *s = bs->opaque;
QemuOpts *opts;
Error *local_err = NULL;
const char *filename, *raw;
int ret;
opts = qemu_opts_create_nofail(&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;
}
/* Parse the raw image filename */
raw = qemu_opt_get(opts, "x-raw");
if (raw == NULL) {
ret = -EINVAL;
goto fail;
}
ret = bdrv_file_open(&bs->file, raw, NULL, flags);
if (ret < 0) {
goto fail;
}
/* Open the test file */
filename = qemu_opt_get(opts, "x-image");
if (filename == NULL) {
ret = -EINVAL;
goto fail;
}
s->test_file = bdrv_new("");
ret = bdrv_open(s->test_file, filename, NULL, flags, NULL);
if (ret < 0) {
bdrv_unref(s->test_file);
s->test_file = NULL;
goto fail;
}
ret = 0;
fail:
return ret;
}
/**
* Create a blocking socket and connect it to an address.
*
* @str: address string
* @errp: set in case of an error
*
* Returns -1 in case of error, file descriptor on success
**/
int inet_connect(const char *str, Error **errp)
{
QemuOpts *opts;
int sock = -1;
InetSocketAddress *addr;
addr = inet_parse(str, errp);
if (addr != NULL) {
opts = qemu_opts_create_nofail(&dummy_opts);
inet_addr_to_opts(opts, addr);
qapi_free_InetSocketAddress(addr);
sock = inet_connect_opts(opts, errp, NULL, NULL);
qemu_opts_del(opts);
}
return sock;
}
int qemu_global_option(const char *str)
{
char driver[64], property[64];
QemuOpts *opts;
int rc, offset;
rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
if (rc < 2 || str[offset] != '=') {
error_report("can't parse: \"%s\"", str);
return -1;
}
opts = qemu_opts_create_nofail(&qemu_global_opts);
qemu_opt_set(opts, "driver", driver);
qemu_opt_set(opts, "property", property);
qemu_opt_set(opts, "value", str+offset+1);
return 0;
}
/**
* Create a non-blocking socket and connect it to an address.
* Calls the callback function with fd in case of success or -1 in case of
* error.
*
* @str: address string
* @callback: callback function that is called when connect completes,
* cannot be NULL.
* @opaque: opaque for callback function
* @errp: set in case of an error
*
* Returns: -1 on immediate error, file descriptor on success.
**/
int inet_nonblocking_connect(const char *str,
NonBlockingConnectHandler *callback,
void *opaque, Error **errp)
{
QemuOpts *opts;
int sock = -1;
InetSocketAddress *addr;
g_assert(callback != NULL);
addr = inet_parse(str, errp);
if (addr != NULL) {
opts = qemu_opts_create_nofail(&dummy_opts);
inet_addr_to_opts(opts, addr);
qapi_free_InetSocketAddress(addr);
sock = inet_connect_opts(opts, errp, callback, opaque);
qemu_opts_del(opts);
}
return sock;
}
int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
{
QemuOpts *opts;
int fd;
opts = qemu_opts_create_nofail(&socket_optslist);
switch (remote->kind) {
case SOCKET_ADDRESS_KIND_INET:
qemu_opt_set(opts, "host", remote->inet->host);
qemu_opt_set(opts, "port", remote->inet->port);
if (local) {
qemu_opt_set(opts, "localaddr", local->inet->host);
qemu_opt_set(opts, "localport", local->inet->port);
}
fd = inet_dgram_opts(opts, errp);
break;
default:
error_setg(errp, "socket type unsupported for datagram");
return -1;
}
qemu_opts_del(opts);
return fd;
}
/*
* We support iscsi url's on the form
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
*/
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags)
{
IscsiLun *iscsilun = bs->opaque;
struct iscsi_context *iscsi = NULL;
struct iscsi_url *iscsi_url = NULL;
struct scsi_task *task = NULL;
struct scsi_inquiry_standard *inq = NULL;
char *initiator_name = NULL;
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
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;
}
opts = qemu_opts_create_nofail(&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 out;
}
filename = qemu_opt_get(opts, "filename");
iscsi_url = iscsi_parse_full_url(iscsi, filename);
if (iscsi_url == NULL) {
error_report("Failed to parse URL : %s", filename);
ret = -EINVAL;
goto out;
}
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 out;
}
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
error_report("iSCSI: Failed to set target name.");
ret = -EINVAL;
goto out;
}
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 out;
}
}
/* 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 out;
}
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) {
error_report("iSCSI: Failed to set session type to normal.");
ret = -EINVAL;
goto out;
}
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);
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) {
error_report("iSCSI: Failed to connect to LUN : %s",
iscsi_get_error(iscsi));
ret = -EINVAL;
goto out;
}
iscsilun->iscsi = iscsi;
iscsilun->lun = iscsi_url->lun;
task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36);
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
error_report("iSCSI: failed to send inquiry command.");
ret = -EINVAL;
goto out;
}
inq = scsi_datain_unmarshall(task);
if (inq == NULL) {
error_report("iSCSI: Failed to unmarshall inquiry data.");
ret = -EINVAL;
goto out;
}
iscsilun->type = inq->periperal_device_type;
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) {
goto out;
}
bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun);
/* Medium changer or tape. We dont have any emulation for this so this must
* be sg ioctl compatible. We force it to be sg, otherwise qemu will try
* to read from the device to guess the image format.
*/
if (iscsilun->type == TYPE_MEDIUM_CHANGER ||
iscsilun->type == TYPE_TAPE) {
bs->sg = 1;
}
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
/* Set up a timer for sending out iSCSI NOPs */
iscsilun->nop_timer = qemu_new_timer_ms(rt_clock, iscsi_nop_timed_event, iscsilun);
qemu_mod_timer(iscsilun->nop_timer, qemu_get_clock_ms(rt_clock) + NOP_INTERVAL);
#endif
out:
qemu_opts_del(opts);
if (initiator_name != NULL) {
g_free(initiator_name);
}
if (iscsi_url != NULL) {
iscsi_destroy_url(iscsi_url);
}
if (task != NULL) {
scsi_free_scsi_task(task);
}
if (ret) {
if (iscsi != NULL) {
iscsi_destroy_context(iscsi);
}
memset(iscsilun, 0, sizeof(IscsiLun));
}
return ret;
}
static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
int bdrv_flags)
{
BDRVGlusterState *s = bs->opaque;
int open_flags = O_BINARY;
int ret = 0;
GlusterConf *gconf = g_malloc0(sizeof(GlusterConf));
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
opts = qemu_opts_create_nofail(&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 out;
}
filename = qemu_opt_get(opts, "filename");
s->glfs = qemu_gluster_init(gconf, filename);
if (!s->glfs) {
ret = -errno;
goto out;
}
if (bdrv_flags & BDRV_O_RDWR) {
open_flags |= O_RDWR;
} else {
open_flags |= O_RDONLY;
}
if ((bdrv_flags & BDRV_O_NOCACHE)) {
open_flags |= O_DIRECT;
}
s->fd = glfs_open(s->glfs, gconf->image, open_flags);
if (!s->fd) {
ret = -errno;
goto out;
}
ret = qemu_pipe(s->fds);
if (ret < 0) {
ret = -errno;
goto out;
}
fcntl(s->fds[GLUSTER_FD_READ], F_SETFL, O_NONBLOCK);
qemu_aio_set_fd_handler(s->fds[GLUSTER_FD_READ],
qemu_gluster_aio_event_reader, NULL, s);
out:
qemu_opts_del(opts);
qemu_gluster_gconf_free(gconf);
if (!ret) {
return ret;
}
if (s->fd) {
glfs_close(s->fd);
}
if (s->glfs) {
glfs_fini(s->glfs);
}
return ret;
}
static int curl_open(BlockDriverState *bs, QDict *options, int flags)
{
BDRVCURLState *s = bs->opaque;
CURLState *state = NULL;
QemuOpts *opts;
Error *local_err = NULL;
const char *file;
double d;
static int inited = 0;
if (flags & BDRV_O_RDWR) {
qerror_report(ERROR_CLASS_GENERIC_ERROR,
"curl block device does not support writes");
return -EROFS;
}
opts = qemu_opts_create_nofail(&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);
goto out_noclean;
}
s->readahead_size = qemu_opt_get_size(opts, "readahead", READ_AHEAD_SIZE);
if ((s->readahead_size & 0x1ff) != 0) {
fprintf(stderr, "HTTP_READAHEAD_SIZE %zd is not a multiple of 512\n",
s->readahead_size);
goto out_noclean;
}
file = qemu_opt_get(opts, "url");
if (file == NULL) {
qerror_report(ERROR_CLASS_GENERIC_ERROR, "curl block driver requires "
"an 'url' option");
goto out_noclean;
}
if (!inited) {
curl_global_init(CURL_GLOBAL_ALL);
inited = 1;
}
DPRINTF("CURL: Opening %s\n", file);
s->url = g_strdup(file);
state = curl_init_state(s);
if (!state)
goto out_noclean;
// Get file size
s->accept_range = false;
curl_easy_setopt(state->curl, CURLOPT_NOBODY, 1);
curl_easy_setopt(state->curl, CURLOPT_HEADERFUNCTION,
curl_header_cb);
curl_easy_setopt(state->curl, CURLOPT_HEADERDATA, s);
if (curl_easy_perform(state->curl))
goto out;
curl_easy_getinfo(state->curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &d);
if (d)
s->len = (size_t)d;
else if(!s->len)
goto out;
if ((!strncasecmp(s->url, "http://", strlen("http://"))
|| !strncasecmp(s->url, "https://", strlen("https://")))
&& !s->accept_range) {
pstrcpy(state->errmsg, CURL_ERROR_SIZE,
"Server does not support 'range' (byte ranges).");
goto out;
}
DPRINTF("CURL: Size = %zd\n", s->len);
curl_clean_state(state);
curl_easy_cleanup(state->curl);
state->curl = NULL;
// Now we know the file exists and its size, so let's
// initialize the multi interface!
s->multi = curl_multi_init();
curl_multi_setopt(s->multi, CURLMOPT_SOCKETDATA, s);
curl_multi_setopt(s->multi, CURLMOPT_SOCKETFUNCTION, curl_sock_cb);
curl_multi_do(s);
qemu_opts_del(opts);
return 0;
out:
fprintf(stderr, "CURL: Error opening file: %s\n", state->errmsg);
curl_easy_cleanup(state->curl);
state->curl = NULL;
out_noclean:
g_free(s->url);
qemu_opts_del(opts);
return -EINVAL;
}
static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags)
{
BDRVRBDState *s = bs->opaque;
char pool[RBD_MAX_POOL_NAME_SIZE];
char snap_buf[RBD_MAX_SNAP_NAME_SIZE];
char conf[RBD_MAX_CONF_SIZE];
char clientname_buf[RBD_MAX_CONF_SIZE];
char *clientname;
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
int r;
opts = qemu_opts_create_nofail(&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);
qemu_opts_del(opts);
return -EINVAL;
}
filename = qemu_opt_get(opts, "filename");
if (qemu_rbd_parsename(filename, pool, sizeof(pool),
snap_buf, sizeof(snap_buf),
s->name, sizeof(s->name),
conf, sizeof(conf)) < 0) {
r = -EINVAL;
goto failed_opts;
}
clientname = qemu_rbd_parse_clientname(conf, clientname_buf);
r = rados_create(&s->cluster, clientname);
if (r < 0) {
error_report("error initializing");
goto failed_opts;
}
s->snap = NULL;
if (snap_buf[0] != '\0') {
s->snap = g_strdup(snap_buf);
}
/*
* Fallback to more conservative semantics if setting cache
* options fails. Ignore errors from setting rbd_cache because the
* only possible error is that the option does not exist, and
* librbd defaults to no caching. If write through caching cannot
* be set up, fall back to no caching.
*/
if (flags & BDRV_O_NOCACHE) {
rados_conf_set(s->cluster, "rbd_cache", "false");
} else {
rados_conf_set(s->cluster, "rbd_cache", "true");
}
if (strstr(conf, "conf=") == NULL) {
/* try default location, but ignore failure */
rados_conf_read_file(s->cluster, NULL);
}
if (conf[0] != '\0') {
r = qemu_rbd_set_conf(s->cluster, conf);
if (r < 0) {
error_report("error setting config options");
goto failed_shutdown;
}
}
r = rados_connect(s->cluster);
if (r < 0) {
error_report("error connecting");
goto failed_shutdown;
}
r = rados_ioctx_create(s->cluster, pool, &s->io_ctx);
if (r < 0) {
error_report("error opening pool %s", pool);
goto failed_shutdown;
}
r = rbd_open(s->io_ctx, s->name, &s->image, s->snap);
if (r < 0) {
error_report("error reading header from %s", s->name);
goto failed_open;
}
bs->read_only = (s->snap != NULL);
s->event_reader_pos = 0;
r = qemu_pipe(s->fds);
if (r < 0) {
error_report("error opening eventfd");
goto failed;
}
fcntl(s->fds[0], F_SETFL, O_NONBLOCK);
fcntl(s->fds[1], F_SETFL, O_NONBLOCK);
qemu_aio_set_fd_handler(s->fds[RBD_FD_READ], qemu_rbd_aio_event_reader,
NULL, qemu_rbd_aio_flush_cb, s);
qemu_opts_del(opts);
return 0;
failed:
rbd_close(s->image);
failed_open:
rados_ioctx_destroy(s->io_ctx);
failed_shutdown:
rados_shutdown(s->cluster);
g_free(s->snap);
failed_opts:
qemu_opts_del(opts);
return r;
}
int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
{
char line[1024], group[64], id[64], arg[64], value[1024];
Location loc;
QemuOptsList *list = NULL;
Error *local_err = NULL;
QemuOpts *opts = NULL;
int res = -1, lno = 0;
loc_push_none(&loc);
while (fgets(line, sizeof(line), fp) != NULL) {
loc_set_file(fname, ++lno);
if (line[0] == '\n') {
/* skip empty lines */
continue;
}
if (line[0] == '#') {
/* comment */
continue;
}
if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
/* group with id */
list = find_list(lists, group, &local_err);
if (error_is_set(&local_err)) {
error_report("%s\n", error_get_pretty(local_err));
error_free(local_err);
goto out;
}
opts = qemu_opts_create(list, id, 1, NULL);
continue;
}
if (sscanf(line, "[%63[^]]]", group) == 1) {
/* group without id */
list = find_list(lists, group, &local_err);
if (error_is_set(&local_err)) {
error_report("%s\n", error_get_pretty(local_err));
error_free(local_err);
goto out;
}
opts = qemu_opts_create_nofail(list);
continue;
}
if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
/* arg = value */
if (opts == NULL) {
error_report("no group defined");
goto out;
}
if (qemu_opt_set(opts, arg, value) != 0) {
goto out;
}
continue;
}
error_report("parse error");
goto out;
}
if (ferror(fp)) {
error_report("error reading file");
goto out;
}
res = 0;
out:
loc_pop(&loc);
return res;
}
