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conf: consolidate disk def allocation
A future patch wants to create disk definitions with non-zero default contents; to avoid crashes, all callers that allocate a disk definition should go through a common point. I found allocation points by looking for any code that increments ndisks, as well as any matches for ALLOC.*disk. Most places that modified ndisks were covered by the parse from XML to domain/device definition by initial domain creation or device hotplug; I also hand-checked all drivers that generate a device struct on the fly during getXMLDesc. * src/conf/domain_conf.h (virDomainDiskDefNew): New prototype. * src/conf/domain_conf.c (virDomainDiskDefNew): New function. (virDomainDiskDefParseXML): Use it. * src/parallels/parallels_driver.c (parallelsAddHddInfo): Likewise. * src/qemu/qemu_command.c (qemuParseCommandLine): Likewise. * src/vbox/vbox_tmpl.c (vboxDomainGetXMLDesc): Likewise. * src/vmx/vmx.c (virVMXParseDisk): Likewise. * src/xenxs/xen_sxpr.c (xenParseSxprDisks, xenParseSxpr): Likewise. * src/xenxs/xen_xm.c (xenParseXM): Likewise. * src/libvirt_private.syms (domain_conf.h): Export it. Signed-off-by: Eric Blake <eblake@redhat.com>
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@ -1181,6 +1181,16 @@ void virDomainLeaseDefFree(virDomainLeaseDefPtr def)
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}
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virDomainDiskDefPtr
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virDomainDiskDefNew(void)
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{
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virDomainDiskDefPtr ret;
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ignore_value(VIR_ALLOC(ret));
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return ret;
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}
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void
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virDomainDiskDefFree(virDomainDiskDefPtr def)
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{
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@ -5232,7 +5242,7 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
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int expected_secret_usage = -1;
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int auth_secret_usage = -1;
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if (VIR_ALLOC(def) < 0)
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if (!(def = virDomainDiskDefNew()))
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return NULL;
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def->geometry.cylinders = 0;
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@ -2129,6 +2129,7 @@ void virDomainPanicDefFree(virDomainPanicDefPtr panic);
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void virDomainResourceDefFree(virDomainResourceDefPtr resource);
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void virDomainGraphicsDefFree(virDomainGraphicsDefPtr def);
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void virDomainInputDefFree(virDomainInputDefPtr def);
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virDomainDiskDefPtr virDomainDiskDefNew(void);
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void virDomainDiskDefFree(virDomainDiskDefPtr def);
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void virDomainLeaseDefFree(virDomainLeaseDefPtr def);
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int virDomainDiskGetType(virDomainDiskDefPtr def);
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@ -207,6 +207,7 @@ virDomainDiskDefAssignAddress;
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virDomainDiskDefForeachPath;
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virDomainDiskDefFree;
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virDomainDiskDefGetSecurityLabelDef;
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virDomainDiskDefNew;
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virDomainDiskDeviceTypeToString;
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virDomainDiskDiscardTypeToString;
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virDomainDiskErrorPolicyTypeFromString;
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@ -407,7 +407,7 @@ parallelsAddHddInfo(virDomainDefPtr def, const char *key, virJSONValuePtr value)
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{
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virDomainDiskDefPtr disk = NULL;
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto error;
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if (parallelsGetHddInfo(def, disk, key, value))
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@ -10997,7 +10997,7 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
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STRPREFIX(arg, "-fd") ||
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STREQ(arg, "-cdrom")) {
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WANT_VALUE();
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto error;
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if (STRPREFIX(val, "/dev/"))
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@ -11297,7 +11297,7 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
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goto error;
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}
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} else if (STRPREFIX(val, "disk:")) {
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto error;
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if (VIR_STRDUP(disk->src.path, val + strlen("disk:")) < 0)
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goto error;
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@ -2768,7 +2768,7 @@ static char *vboxDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {
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if ((def->ndisks > 0) && (VIR_ALLOC_N(def->disks, def->ndisks) >= 0)) {
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for (i = 0; i < def->ndisks; i++) {
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if (VIR_ALLOC(def->disks[i]) >= 0) {
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if ((def->disks[i] = virDomainDiskDefNew())) {
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def->disks[i]->device = VIR_DOMAIN_DISK_DEVICE_DISK;
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def->disks[i]->bus = VIR_DOMAIN_DISK_BUS_IDE;
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virDomainDiskSetType(def->disks[i],
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@ -3247,7 +3247,7 @@ static char *vboxDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {
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def->ndisks++;
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if (VIR_REALLOC_N(def->disks, def->ndisks) >= 0) {
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if (VIR_ALLOC(def->disks[def->ndisks - 1]) >= 0) {
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if ((def->disks[def->ndisks - 1] = virDomainDiskDefNew())) {
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def->disks[def->ndisks - 1]->device = VIR_DOMAIN_DISK_DEVICE_CDROM;
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def->disks[def->ndisks - 1]->bus = VIR_DOMAIN_DISK_BUS_IDE;
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virDomainDiskSetType(def->disks[def->ndisks - 1],
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@ -3294,7 +3294,7 @@ static char *vboxDomainGetXMLDesc(virDomainPtr dom, unsigned int flags) {
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def->ndisks++;
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if (VIR_REALLOC_N(def->disks, def->ndisks) >= 0) {
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if (VIR_ALLOC(def->disks[def->ndisks - 1]) >= 0) {
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if ((def->disks[def->ndisks - 1] = virDomainDiskDefNew())) {
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def->disks[def->ndisks - 1]->device = VIR_DOMAIN_DISK_DEVICE_FLOPPY;
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def->disks[def->ndisks - 1]->bus = VIR_DOMAIN_DISK_BUS_FDC;
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virDomainDiskSetType(def->disks[def->ndisks - 1],
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@ -1998,7 +1998,7 @@ virVMXParseDisk(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virConfPtr con
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return -1;
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}
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if (VIR_ALLOC(*def) < 0)
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if (!(*def = virDomainDiskDefNew()))
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return -1;
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(*def)->device = device;
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@ -370,7 +370,7 @@ xenParseSxprDisks(virDomainDefPtr def,
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bootable = sexpr_node(node, "device/tap/bootable");
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}
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto error;
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if (dst == NULL) {
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@ -1304,7 +1304,7 @@ xenParseSxpr(const struct sexpr *root,
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tmp = sexpr_node(root, "domain/image/hvm/cdrom");
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if ((tmp != NULL) && (tmp[0] != 0)) {
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virDomainDiskDefPtr disk;
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto error;
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if (virDomainDiskSetSource(disk, tmp) < 0) {
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virDomainDiskDefFree(disk);
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@ -1339,10 +1339,10 @@ xenParseSxpr(const struct sexpr *root,
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tmp = sexpr_fmt_node(root, "domain/image/hvm/%s", fds[i]);
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if ((tmp != NULL) && (tmp[0] != 0)) {
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virDomainDiskDefPtr disk;
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto error;
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if (virDomainDiskSetSource(disk, tmp) < 0) {
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VIR_FREE(disk);
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virDomainDiskDefFree(disk);
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goto error;
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}
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virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
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@ -486,7 +486,7 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
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goto skipdisk;
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head = list->str;
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto cleanup;
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/*
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@ -632,7 +632,7 @@ xenParseXM(virConfPtr conf, int xendConfigVersion,
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if (xenXMConfigGetString(conf, "cdrom", &str, NULL) < 0)
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goto cleanup;
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if (str) {
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if (VIR_ALLOC(disk) < 0)
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if (!(disk = virDomainDiskDefNew()))
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goto cleanup;
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virDomainDiskSetType(disk, VIR_STORAGE_TYPE_FILE);
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