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qemu: support URI syntax for NBD
QEMU 1.3 and newer support an alternative URI-based syntax to specify the location of an NBD server. Libvirt can keep on using the old syntax in general, but only the URI syntax supports IPv6 addresses. The URI syntax also supports relative paths to Unix sockets. These should never be used but aren't explicitly blocked either by the parser, so support it just in case. The URI syntax is intentionally compatible with Gluster's, and the code can be reused. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
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be2a15dd60
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eebbb232e6
@ -2296,36 +2296,37 @@ no_memory:
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}
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static int
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qemuParseGlusterString(virDomainDiskDefPtr def)
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qemuParseDriveURIString(virDomainDiskDefPtr def, virURIPtr uri,
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const char *scheme)
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{
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int ret = -1;
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char *transp = NULL;
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char *sock = NULL;
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char *volimg = NULL;
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virURIPtr uri = NULL;
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if (!(uri = virURIParse(def->src))) {
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return -1;
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}
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if (VIR_ALLOC(def->hosts) < 0)
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goto no_memory;
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if (STREQ(uri->scheme, "gluster")) {
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def->hosts->transport = VIR_DOMAIN_DISK_PROTO_TRANS_TCP;
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} else if (STRPREFIX(uri->scheme, "gluster+")) {
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transp = strchr(uri->scheme, '+') + 1;
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def->hosts->transport = virDomainDiskProtocolTransportTypeFromString(transp);
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if (def->hosts->transport < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Invalid gluster transport type '%s'"), transp);
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goto error;
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}
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} else {
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transp = strchr(uri->scheme, '+');
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if (transp)
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*transp++ = 0;
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if (!STREQ(uri->scheme, scheme)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Invalid transport/scheme '%s'"), uri->scheme);
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goto error;
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}
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if (!transp) {
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def->hosts->transport = VIR_DOMAIN_DISK_PROTO_TRANS_TCP;
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} else {
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def->hosts->transport = virDomainDiskProtocolTransportTypeFromString(transp);
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if (def->hosts->transport < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Invalid %s transport type '%s'"), scheme, transp);
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goto error;
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}
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}
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def->nhosts = 0; /* set to 1 once everything succeeds */
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if (def->hosts->transport != VIR_DOMAIN_DISK_PROTO_TRANS_UNIX) {
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@ -2351,11 +2352,16 @@ qemuParseGlusterString(virDomainDiskDefPtr def)
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}
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}
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}
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volimg = uri->path + 1; /* skip the prefix slash */
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VIR_FREE(def->src);
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def->src = strdup(volimg);
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if (!def->src)
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goto no_memory;
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if (uri->path) {
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volimg = uri->path + 1; /* skip the prefix slash */
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VIR_FREE(def->src);
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def->src = strdup(volimg);
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if (!def->src)
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goto no_memory;
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} else {
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VIR_FREE(def->src);
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def->src = NULL;
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}
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def->nhosts = 1;
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ret = 0;
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@ -2373,6 +2379,17 @@ error:
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goto cleanup;
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}
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static int
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qemuParseGlusterString(virDomainDiskDefPtr def)
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{
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virURIPtr uri = NULL;
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if (!(uri = virURIParse(def->src)))
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return -1;
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return qemuParseDriveURIString(def, uri, "gluster");
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}
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static int
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qemuParseNBDString(virDomainDiskDefPtr disk)
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{
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@ -2380,6 +2397,14 @@ qemuParseNBDString(virDomainDiskDefPtr disk)
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char *host, *port;
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char *src;
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virURIPtr uri = NULL;
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if (strstr(disk->src, "://")) {
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uri = virURIParse(disk->src);
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if (uri)
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return qemuParseDriveURIString(disk, uri, "nbd");
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}
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if (VIR_ALLOC(h) < 0)
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goto no_memory;
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@ -2436,7 +2461,8 @@ error:
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}
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static int
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qemuBuildGlusterString(virDomainDiskDefPtr disk, virBufferPtr opt)
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qemuBuildDriveURIString(virDomainDiskDefPtr disk, virBufferPtr opt,
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const char *scheme)
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{
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int ret = -1;
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int port = 0;
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@ -2450,18 +2476,18 @@ qemuBuildGlusterString(virDomainDiskDefPtr disk, virBufferPtr opt)
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};
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if (disk->nhosts != 1) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("gluster accepts only one host"));
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("%s accepts only one host"), scheme);
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return -1;
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}
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virBufferAddLit(opt, "file=");
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transp = virDomainDiskProtocolTransportTypeToString(disk->hosts->transport);
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if (virAsprintf(&tmpscheme, "gluster+%s", transp) < 0)
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if (virAsprintf(&tmpscheme, "%s+%s", scheme, transp) < 0)
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goto no_memory;
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if (virAsprintf(&volimg, "/%s", disk->src) < 0)
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if (disk->src && virAsprintf(&volimg, "/%s", disk->src) < 0)
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goto no_memory;
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if (disk->hosts->port) {
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@ -2496,6 +2522,12 @@ no_memory:
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goto cleanup;
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}
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static int
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qemuBuildGlusterString(virDomainDiskDefPtr disk, virBufferPtr opt)
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{
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return qemuBuildDriveURIString(disk, opt, "gluster");
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}
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#define QEMU_DEFAULT_NBD_PORT "10809"
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static int
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@ -2509,6 +2541,13 @@ qemuBuildNBDString(virDomainDiskDefPtr disk, virBufferPtr opt)
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return -1;
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}
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if ((disk->hosts->name && strchr(disk->hosts->name, ':'))
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|| (disk->hosts->transport == VIR_DOMAIN_DISK_PROTO_TRANS_TCP
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&& !disk->hosts->name)
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|| (disk->hosts->transport == VIR_DOMAIN_DISK_PROTO_TRANS_UNIX
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&& disk->hosts->socket && disk->hosts->socket[0] != '/'))
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return qemuBuildDriveURIString(disk, opt, "nbd");
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virBufferAddLit(opt, "file=nbd:");
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switch (disk->hosts->transport) {
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@ -7832,7 +7871,8 @@ qemuParseCommandLineDisk(virCapsPtr qemuCaps,
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values[i] = NULL;
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if (STRPREFIX(def->src, "/dev/"))
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def->type = VIR_DOMAIN_DISK_TYPE_BLOCK;
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else if (STRPREFIX(def->src, "nbd:")) {
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else if (STRPREFIX(def->src, "nbd:") ||
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STRPREFIX(def->src, "nbd+")) {
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def->type = VIR_DOMAIN_DISK_TYPE_NETWORK;
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def->protocol = VIR_DOMAIN_DISK_PROTOCOL_NBD;
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@ -7853,7 +7893,8 @@ qemuParseCommandLineDisk(virCapsPtr qemuCaps,
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goto cleanup;
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VIR_FREE(p);
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} else if (STRPREFIX(def->src, "gluster")) {
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} else if (STRPREFIX(def->src, "gluster:") ||
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STRPREFIX(def->src, "gluster+")) {
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def->type = VIR_DOMAIN_DISK_TYPE_NETWORK;
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def->protocol = VIR_DOMAIN_DISK_PROTOCOL_GLUSTER;
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@ -186,6 +186,8 @@ mymain(void)
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DO_TEST("disk-drive-cache-unsafe");
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DO_TEST("disk-drive-network-nbd");
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DO_TEST("disk-drive-network-nbd-export");
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DO_TEST("disk-drive-network-nbd-ipv6");
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DO_TEST("disk-drive-network-nbd-ipv6-export");
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DO_TEST("disk-drive-network-nbd-unix");
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DO_TEST("disk-drive-network-gluster");
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DO_TEST("disk-drive-network-rbd");
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@ -0,0 +1,5 @@
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LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M \
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pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait \
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-no-acpi -boot c -usb -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 \
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-drive 'file=nbd+tcp://[::1]:6000/bar,if=virtio,format=raw' -net none \
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-serial none -parallel none
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@ -0,0 +1,33 @@
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<domain type='qemu'>
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<name>QEMUGuest1</name>
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<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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<memory unit='KiB'>219136</memory>
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<currentMemory unit='KiB'>219136</currentMemory>
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<vcpu placement='static'>1</vcpu>
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<os>
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<type arch='i686' machine='pc'>hvm</type>
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<boot dev='hd'/>
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</os>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<emulator>/usr/bin/qemu</emulator>
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<disk type='block' device='disk'>
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<source dev='/dev/HostVG/QEMUGuest1'/>
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<target dev='hda' bus='ide'/>
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<address type='drive' controller='0' bus='0' target='0' unit='0'/>
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</disk>
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<disk type='network' device='disk'>
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<driver name='qemu' type='raw'/>
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<source protocol='nbd' name='bar'>
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<host name='::1' port='6000'/>
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</source>
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<target dev='vda' bus='virtio'/>
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</disk>
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<controller type='usb' index='0'/>
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<controller type='ide' index='0'/>
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<memballoon model='virtio'/>
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</devices>
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</domain>
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@ -0,0 +1,5 @@
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LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M \
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pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait \
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-no-acpi -boot c -usb -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 \
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-drive 'file=nbd+tcp://[::1]:6000,if=virtio,format=raw' -net none \
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-serial none -parallel none
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@ -0,0 +1,33 @@
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<domain type='qemu'>
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<name>QEMUGuest1</name>
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<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
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<memory unit='KiB'>219136</memory>
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<currentMemory unit='KiB'>219136</currentMemory>
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<vcpu placement='static'>1</vcpu>
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<os>
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<type arch='i686' machine='pc'>hvm</type>
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<boot dev='hd'/>
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</os>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<emulator>/usr/bin/qemu</emulator>
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<disk type='block' device='disk'>
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<source dev='/dev/HostVG/QEMUGuest1'/>
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<target dev='hda' bus='ide'/>
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<address type='drive' controller='0' bus='0' target='0' unit='0'/>
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</disk>
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<disk type='network' device='disk'>
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<driver name='qemu' type='raw'/>
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<source protocol='nbd'>
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<host name='::1' port='6000'/>
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</source>
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<target dev='vda' bus='virtio'/>
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</disk>
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<controller type='usb' index='0'/>
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<controller type='ide' index='0'/>
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<memballoon model='virtio'/>
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</devices>
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</domain>
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@ -495,6 +495,10 @@ mymain(void)
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QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
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DO_TEST("disk-drive-network-nbd-export",
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QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
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DO_TEST("disk-drive-network-nbd-ipv6",
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QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
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DO_TEST("disk-drive-network-nbd-ipv6-export",
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QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
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DO_TEST("disk-drive-network-nbd-unix",
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QEMU_CAPS_DRIVE, QEMU_CAPS_DRIVE_FORMAT);
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DO_TEST("disk-drive-network-gluster",
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@ -171,6 +171,8 @@ mymain(void)
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DO_TEST("disk-drive-cache-v1-none");
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DO_TEST("disk-drive-network-nbd");
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DO_TEST("disk-drive-network-nbd-export");
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DO_TEST("disk-drive-network-nbd-ipv6");
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DO_TEST("disk-drive-network-nbd-ipv6-export");
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DO_TEST("disk-drive-network-nbd-unix");
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DO_TEST("disk-scsi-device");
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DO_TEST("disk-scsi-vscsi");
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