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block/nbd: Use QemuOpts for runtime options 

Using QemuOpts will prevent qemu from crashing if the input options have
not been validated (which is the case when they are specified on the
command line or in a json: filename) and some have the wrong type.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2016-08-15 15:29:24 +02:00 committed by Kevin Wolf
parent 8a6a80896d
commit 7ccc44fd7d
1 changed files with 54 additions and 20 deletions
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74
block/nbd.c
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@ -188,13 +188,13 @@ out:
g_free(file);
}
static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options, char **export,
static SocketAddress *nbd_config(BDRVNBDState *s, QemuOpts *opts, char **export,
Error **errp)
{
SocketAddress *saddr;
if (qdict_haskey(options, "path") == qdict_haskey(options, "host")) {
if (qdict_haskey(options, "path")) {
if (!qemu_opt_get(opts, "path") == !qemu_opt_get(opts, "host")) {
if (qemu_opt_get(opts, "path")) {
error_setg(errp, "path and host may not be used at the same time.");
} else {
error_setg(errp, "one of path and host must be specified.");
@ -204,32 +204,25 @@ static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options, char **export,
saddr = g_new0(SocketAddress, 1);
if (qdict_haskey(options, "path")) {
if (qemu_opt_get(opts, "path")) {
UnixSocketAddress *q_unix;
saddr->type = SOCKET_ADDRESS_KIND_UNIX;
q_unix = saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
q_unix->path = g_strdup(qdict_get_str(options, "path"));
qdict_del(options, "path");
q_unix->path = g_strdup(qemu_opt_get(opts, "path"));
} else {
InetSocketAddress *inet;
saddr->type = SOCKET_ADDRESS_KIND_INET;
inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1);
inet->host = g_strdup(qdict_get_str(options, "host"));
if (!qdict_get_try_str(options, "port")) {
inet->host = g_strdup(qemu_opt_get(opts, "host"));
inet->port = g_strdup(qemu_opt_get(opts, "port"));
if (!inet->port) {
inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT);
} else {
inet->port = g_strdup(qdict_get_str(options, "port"));
}
qdict_del(options, "host");
qdict_del(options, "port");
}
s->client.is_unix = saddr->type == SOCKET_ADDRESS_KIND_UNIX;
*export = g_strdup(qdict_get_try_str(options, "export"));
if (*export) {
qdict_del(options, "export");
}
*export = g_strdup(qemu_opt_get(opts, "export"));
return saddr;
}
@ -292,27 +285,67 @@ static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp)
}
static QemuOptsList nbd_runtime_opts = {
.name = "nbd",
.head = QTAILQ_HEAD_INITIALIZER(nbd_runtime_opts.head),
.desc = {
{
.name = "host",
.type = QEMU_OPT_STRING,
.help = "TCP host to connect to",
},
{
.name = "port",
.type = QEMU_OPT_STRING,
.help = "TCP port to connect to",
},
{
.name = "path",
.type = QEMU_OPT_STRING,
.help = "Unix socket path to connect to",
},
{
.name = "export",
.type = QEMU_OPT_STRING,
.help = "Name of the NBD export to open",
},
{
.name = "tls-creds",
.type = QEMU_OPT_STRING,
.help = "ID of the TLS credentials to use",
},
},
};
static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVNBDState *s = bs->opaque;
QemuOpts *opts = NULL;
Error *local_err = NULL;
char *export = NULL;
QIOChannelSocket *sioc = NULL;
SocketAddress *saddr;
SocketAddress *saddr = NULL;
const char *tlscredsid;
QCryptoTLSCreds *tlscreds = NULL;
const char *hostname = NULL;
int ret = -EINVAL;
opts = qemu_opts_create(&nbd_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto error;
}
/* Pop the config into our state object. Exit if invalid. */
saddr = nbd_config(s, options, &export, errp);
saddr = nbd_config(s, opts, &export, errp);
if (!saddr) {
goto error;
}
tlscredsid = g_strdup(qdict_get_try_str(options, "tls-creds"));
tlscredsid = g_strdup(qemu_opt_get(opts, "tls-creds"));
if (tlscredsid) {
qdict_del(options, "tls-creds");
tlscreds = nbd_get_tls_creds(tlscredsid, errp);
if (!tlscreds) {
goto error;
@ -346,6 +379,7 @@ static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
}
qapi_free_SocketAddress(saddr);
g_free(export);
qemu_opts_del(opts);
return ret;
}