/* * config.c: VM configuration management * * Copyright (C) 2006, 2007 Red Hat, Inc. * Copyright (C) 2006 Daniel P. Berrange * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Author: Daniel P. Berrange */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "qemu_conf.h" #include "uuid.h" #include "buf.h" #define qemudLog(level, msg...) fprintf(stderr, msg) void qemudReportError(virConnectPtr conn, virDomainPtr dom, virNetworkPtr net, int code, const char *fmt, ...) { va_list args; char errorMessage[QEMUD_MAX_ERROR_LEN]; if (fmt) { va_start(args, fmt); vsnprintf(errorMessage, QEMUD_MAX_ERROR_LEN-1, fmt, args); va_end(args); } else { errorMessage[0] = '\0'; } __virRaiseError(conn, dom, net, VIR_FROM_QEMU, code, VIR_ERR_ERROR, NULL, NULL, NULL, -1, -1, errorMessage); } struct qemud_vm *qemudFindVMByID(const struct qemud_driver *driver, int id) { struct qemud_vm *vm = driver->vms; while (vm) { if (qemudIsActiveVM(vm) && vm->id == id) return vm; vm = vm->next; } return NULL; } struct qemud_vm *qemudFindVMByUUID(const struct qemud_driver *driver, const unsigned char *uuid) { struct qemud_vm *vm = driver->vms; while (vm) { if (!memcmp(vm->def->uuid, uuid, QEMUD_UUID_RAW_LEN)) return vm; vm = vm->next; } return NULL; } struct qemud_vm *qemudFindVMByName(const struct qemud_driver *driver, const char *name) { struct qemud_vm *vm = driver->vms; while (vm) { if (!strcmp(vm->def->name, name)) return vm; vm = vm->next; } return NULL; } struct qemud_network *qemudFindNetworkByUUID(const struct qemud_driver *driver, const unsigned char *uuid) { struct qemud_network *network = driver->networks; while (network) { if (!memcmp(network->def->uuid, uuid, QEMUD_UUID_RAW_LEN)) return network; network = network->next; } return NULL; } struct qemud_network *qemudFindNetworkByName(const struct qemud_driver *driver, const char *name) { struct qemud_network *network = driver->networks; while (network) { if (!strcmp(network->def->name, name)) return network; network = network->next; } return NULL; } /* Free all memory associated with a struct qemud_vm object */ void qemudFreeVMDef(struct qemud_vm_def *def) { struct qemud_vm_disk_def *disk = def->disks; struct qemud_vm_net_def *net = def->nets; while (disk) { struct qemud_vm_disk_def *prev = disk; disk = disk->next; free(prev); } while (net) { struct qemud_vm_net_def *prev = net; net = net->next; free(prev); } free(def); } void qemudFreeVM(struct qemud_vm *vm) { qemudFreeVMDef(vm->def); if (vm->newDef) qemudFreeVMDef(vm->newDef); free(vm); } /* Build up a fully qualfiied path for a config file to be * associated with a persistent guest or network */ static int qemudMakeConfigPath(const char *configDir, const char *name, const char *ext, char *buf, unsigned int buflen) { if ((strlen(configDir) + 1 + strlen(name) + (ext ? strlen(ext) : 0) + 1) > buflen) return -1; strcpy(buf, configDir); strcat(buf, "/"); strcat(buf, name); if (ext) strcat(buf, ext); return 0; } int qemudEnsureDir(const char *path) { struct stat st; char parent[PATH_MAX]; char *p; int err; if (stat(path, &st) >= 0) return 0; strncpy(parent, path, PATH_MAX); parent[PATH_MAX - 1] = '\0'; if (!(p = strrchr(parent, '/'))) return EINVAL; if (p == parent) return EPERM; *p = '\0'; if ((err = qemudEnsureDir(parent))) return err; if (mkdir(path, 0777) < 0 && errno != EEXIST) return errno; return 0; } /* The list of possible machine types for various architectures, as supported by QEMU - taken from 'qemu -M ?' for each arch */ static const char *arch_info_x86_machines[] = { "pc", "isapc", NULL }; static const char *arch_info_mips_machines[] = { "mips", NULL }; static const char *arch_info_sparc_machines[] = { "sun4m", NULL }; static const char *arch_info_ppc_machines[] = { "g3bw", "mac99", "prep", NULL }; /* Feature flags for the architecture info */ struct qemu_feature_flags arch_info_i686_flags [] = { { "pae", 1, 1 }, { "acpi", 1, 1 }, { "apic", 1, 0 }, { NULL, -1, -1 } }; struct qemu_feature_flags arch_info_x86_64_flags [] = { { "acpi", 1, 1 }, { "apic", 1, 0 }, { NULL, -1, -1 } }; /* The archicture tables for supported QEMU archs */ struct qemu_arch_info qemudArchs[] = { /* i686 must be in position 0 */ { "i686", 32, arch_info_x86_machines, "qemu", arch_info_i686_flags }, /* x86_64 must be in position 1 */ { "x86_64", 64, arch_info_x86_machines, "qemu-system-x86_64", arch_info_x86_64_flags }, { "mips", 32, arch_info_mips_machines, "qemu-system-mips", NULL }, { "mipsel", 32, arch_info_mips_machines, "qemu-system-mipsel", NULL }, { "sparc", 32, arch_info_sparc_machines, "qemu-system-sparc", NULL }, { "ppc", 32, arch_info_ppc_machines, "qemu-system-ppc", NULL }, { NULL, -1, NULL, NULL, NULL } }; /* Return the default architecture if none is explicitly requested*/ static const char *qemudDefaultArch(void) { return qemudArchs[0].arch; } /* Return the default machine type for a given architecture */ static const char *qemudDefaultMachineForArch(const char *arch) { int i; for (i = 0; qemudArchs[i].arch; i++) { if (!strcmp(qemudArchs[i].arch, arch)) { return qemudArchs[i].machines[0]; } } return NULL; } /* Return the default binary name for a particular architecture */ static const char *qemudDefaultBinaryForArch(const char *arch) { int i; for (i = 0 ; qemudArchs[i].arch; i++) { if (!strcmp(qemudArchs[i].arch, arch)) { return qemudArchs[i].binary; } } return NULL; } /* Find the fully qualified path to the binary for an architecture */ static char *qemudLocateBinaryForArch(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, int virtType, const char *arch) { const char *name; char *path; if (virtType == QEMUD_VIRT_KVM) name = "qemu-kvm"; else name = qemudDefaultBinaryForArch(arch); if (!name) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot determin binary for architecture %s", arch); return NULL; } /* XXX lame. should actually use $PATH ... */ path = malloc(strlen(name) + strlen("/usr/bin/") + 1); if (!path) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "path"); return NULL; } strcpy(path, "/usr/bin/"); strcat(path, name); return path; } static int qemudExtractVersionInfo(const char *qemu, int *version, int *flags) { pid_t child; int newstdout[2]; *flags = 0; *version = 0; if (pipe(newstdout) < 0) { return -1; } if ((child = fork()) < 0) { close(newstdout[0]); close(newstdout[1]); return -1; } if (child == 0) { /* Kid */ if (close(STDIN_FILENO) < 0) goto cleanup1; if (close(STDERR_FILENO) < 0) goto cleanup1; if (close(newstdout[0]) < 0) goto cleanup1; if (dup2(newstdout[1], STDOUT_FILENO) < 0) goto cleanup1; /* Just in case QEMU is translated someday.. */ setenv("LANG", "C", 1); execl(qemu, qemu, (char*)NULL); cleanup1: _exit(-1); /* Just in case */ } else { /* Parent */ char help[8192]; /* Ought to be enough to hold QEMU help screen */ int got = 0, ret = -1; int major, minor, micro; if (close(newstdout[1]) < 0) goto cleanup2; while (got < (sizeof(help)-1)) { int len; if ((len = read(newstdout[0], help+got, sizeof(help)-got-1)) <= 0) { if (!len) break; if (errno == EINTR) continue; goto cleanup2; } got += len; } help[got] = '\0'; if (sscanf(help, "QEMU PC emulator version %d.%d.%d", &major,&minor, µ) != 3) { goto cleanup2; } *version = (major * 1000 * 1000) + (minor * 1000) + micro; if (strstr(help, "-no-kqemu")) *flags |= QEMUD_CMD_FLAG_KQEMU; if (strstr(help, "-no-reboot")) *flags |= QEMUD_CMD_FLAG_NO_REBOOT; if (*version >= 9000) *flags |= QEMUD_CMD_FLAG_VNC_COLON; ret = 0; qemudDebug("Version %d %d %d Cooked version: %d, with flags ? %d", major, minor, micro, *version, *flags); cleanup2: if (close(newstdout[0]) < 0) ret = -1; rewait: if (waitpid(child, &got, 0) != child) { if (errno == EINTR) { goto rewait; } qemudLog(QEMUD_ERR, "Unexpected exit status from qemu %d pid %lu", got, (unsigned long)child); ret = -1; } /* Check & log unexpected exit status, but don't fail, * as there's really no need to throw an error if we did * actually read a valid version number above */ if (WEXITSTATUS(got) != 1) { qemudLog(QEMUD_WARN, "Unexpected exit status '%d', qemu probably failed", got); } return ret; } } int qemudExtractVersion(virConnectPtr conn, struct qemud_driver *driver) { char *binary = NULL; struct stat sb; if (driver->qemuVersion > 0) return 0; if (!(binary = qemudLocateBinaryForArch(conn, driver, QEMUD_VIRT_QEMU, "i686"))) return -1; if (stat(binary, &sb) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Cannot find QEMU binary %s: %s", binary, strerror(errno)); free(binary); return -1; } if (qemudExtractVersionInfo(binary, &driver->qemuVersion, &driver->qemuCmdFlags) < 0) { free(binary); return -1; } free(binary); return 0; } /* Parse the XML definition for a disk */ static struct qemud_vm_disk_def *qemudParseDiskXML(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, xmlNodePtr node) { struct qemud_vm_disk_def *disk = calloc(1, sizeof(struct qemud_vm_disk_def)); xmlNodePtr cur; xmlChar *device = NULL; xmlChar *source = NULL; xmlChar *target = NULL; xmlChar *type = NULL; int typ = 0; if (!disk) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "disk"); return NULL; } type = xmlGetProp(node, BAD_CAST "type"); if (type != NULL) { if (xmlStrEqual(type, BAD_CAST "file")) typ = QEMUD_DISK_FILE; else if (xmlStrEqual(type, BAD_CAST "block")) typ = QEMUD_DISK_BLOCK; else { typ = QEMUD_DISK_FILE; } xmlFree(type); type = NULL; } device = xmlGetProp(node, BAD_CAST "device"); cur = node->children; while (cur != NULL) { if (cur->type == XML_ELEMENT_NODE) { if ((source == NULL) && (xmlStrEqual(cur->name, BAD_CAST "source"))) { if (typ == QEMUD_DISK_FILE) source = xmlGetProp(cur, BAD_CAST "file"); else source = xmlGetProp(cur, BAD_CAST "dev"); } else if ((target == NULL) && (xmlStrEqual(cur->name, BAD_CAST "target"))) { target = xmlGetProp(cur, BAD_CAST "dev"); } else if (xmlStrEqual(cur->name, BAD_CAST "readonly")) { disk->readonly = 1; } } cur = cur->next; } if (source == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SOURCE, target ? "%s" : NULL, target); goto error; } if (target == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_TARGET, source ? "%s" : NULL, source); goto error; } if (device && !strcmp((const char *)device, "floppy") && strcmp((const char *)target, "fda") && strcmp((const char *)target, "fdb")) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid floppy device name: %s", target); goto error; } if (device && !strcmp((const char *)device, "cdrom") && strcmp((const char *)target, "hdc")) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid cdrom device name: %s", target); goto error; } if (device && !strcmp((const char *)device, "cdrom")) disk->readonly = 1; if ((!device || !strcmp((const char *)device, "disk")) && strcmp((const char *)target, "hda") && strcmp((const char *)target, "hdb") && strcmp((const char *)target, "hdc") && strcmp((const char *)target, "hdd")) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid harddisk device name: %s", target); goto error; } strncpy(disk->src, (const char *)source, NAME_MAX-1); disk->src[NAME_MAX-1] = '\0'; strncpy(disk->dst, (const char *)target, NAME_MAX-1); disk->dst[NAME_MAX-1] = '\0'; disk->type = typ; if (!device) disk->device = QEMUD_DISK_DISK; else if (!strcmp((const char *)device, "disk")) disk->device = QEMUD_DISK_DISK; else if (!strcmp((const char *)device, "cdrom")) disk->device = QEMUD_DISK_CDROM; else if (!strcmp((const char *)device, "floppy")) disk->device = QEMUD_DISK_FLOPPY; else { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid device type: %s", device); goto error; } xmlFree(device); xmlFree(target); xmlFree(source); return disk; error: if (type) xmlFree(type); if (target) xmlFree(target); if (source) xmlFree(source); if (device) xmlFree(device); free(disk); return NULL; } static void qemudRandomMAC(struct qemud_vm_net_def *net) { net->mac[0] = 0x52; net->mac[1] = 0x54; net->mac[2] = 0x00; net->mac[3] = 1 + (int)(256*(rand()/(RAND_MAX+1.0))); net->mac[4] = 1 + (int)(256*(rand()/(RAND_MAX+1.0))); net->mac[5] = 1 + (int)(256*(rand()/(RAND_MAX+1.0))); } /* Parse the XML definition for a network interface */ static struct qemud_vm_net_def *qemudParseInterfaceXML(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, xmlNodePtr node) { struct qemud_vm_net_def *net = calloc(1, sizeof(struct qemud_vm_net_def)); xmlNodePtr cur; xmlChar *macaddr = NULL; xmlChar *type = NULL; xmlChar *network = NULL; xmlChar *bridge = NULL; xmlChar *ifname = NULL; xmlChar *script = NULL; xmlChar *address = NULL; xmlChar *port = NULL; if (!net) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "net"); return NULL; } net->type = QEMUD_NET_USER; type = xmlGetProp(node, BAD_CAST "type"); if (type != NULL) { if (xmlStrEqual(type, BAD_CAST "user")) net->type = QEMUD_NET_USER; else if (xmlStrEqual(type, BAD_CAST "ethernet")) net->type = QEMUD_NET_ETHERNET; else if (xmlStrEqual(type, BAD_CAST "server")) net->type = QEMUD_NET_SERVER; else if (xmlStrEqual(type, BAD_CAST "client")) net->type = QEMUD_NET_CLIENT; else if (xmlStrEqual(type, BAD_CAST "mcast")) net->type = QEMUD_NET_MCAST; else if (xmlStrEqual(type, BAD_CAST "network")) net->type = QEMUD_NET_NETWORK; else if (xmlStrEqual(type, BAD_CAST "bridge")) net->type = QEMUD_NET_BRIDGE; else net->type = QEMUD_NET_USER; xmlFree(type); type = NULL; } cur = node->children; while (cur != NULL) { if (cur->type == XML_ELEMENT_NODE) { if ((macaddr == NULL) && (xmlStrEqual(cur->name, BAD_CAST "mac"))) { macaddr = xmlGetProp(cur, BAD_CAST "address"); } else if ((network == NULL) && (net->type == QEMUD_NET_NETWORK) && (xmlStrEqual(cur->name, BAD_CAST "source"))) { network = xmlGetProp(cur, BAD_CAST "network"); } else if ((network == NULL) && (net->type == QEMUD_NET_BRIDGE) && (xmlStrEqual(cur->name, BAD_CAST "source"))) { bridge = xmlGetProp(cur, BAD_CAST "bridge"); } else if ((network == NULL) && ((net->type == QEMUD_NET_SERVER) || (net->type == QEMUD_NET_CLIENT) || (net->type == QEMUD_NET_MCAST)) && (xmlStrEqual(cur->name, BAD_CAST "source"))) { address = xmlGetProp(cur, BAD_CAST "address"); port = xmlGetProp(cur, BAD_CAST "port"); } else if ((ifname == NULL) && ((net->type == QEMUD_NET_NETWORK) || (net->type == QEMUD_NET_ETHERNET) || (net->type == QEMUD_NET_BRIDGE)) && xmlStrEqual(cur->name, BAD_CAST "target")) { ifname = xmlGetProp(cur, BAD_CAST "dev"); } else if ((script == NULL) && (net->type == QEMUD_NET_ETHERNET) && xmlStrEqual(cur->name, BAD_CAST "script")) { script = xmlGetProp(cur, BAD_CAST "path"); } } cur = cur->next; } if (macaddr) { unsigned int mac[6]; sscanf((const char *)macaddr, "%02x:%02x:%02x:%02x:%02x:%02x", (unsigned int*)&mac[0], (unsigned int*)&mac[1], (unsigned int*)&mac[2], (unsigned int*)&mac[3], (unsigned int*)&mac[4], (unsigned int*)&mac[5]); net->mac[0] = mac[0]; net->mac[1] = mac[1]; net->mac[2] = mac[2]; net->mac[3] = mac[3]; net->mac[4] = mac[4]; net->mac[5] = mac[5]; xmlFree(macaddr); macaddr = NULL; } else { qemudRandomMAC(net); } if (net->type == QEMUD_NET_NETWORK) { int len; if (network == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "No 'network' attribute specified with "); goto error; } else if ((len = xmlStrlen(network)) >= (QEMUD_MAX_NAME_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Network name '%s' too long", network); goto error; } else { strncpy(net->dst.network.name, (char *)network, len); net->dst.network.name[len] = '\0'; } if (network) { xmlFree(network); network = NULL; } if (ifname != NULL) { if ((len = xmlStrlen(ifname)) >= (BR_IFNAME_MAXLEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "TAP interface name '%s' is too long", ifname); goto error; } else { strncpy(net->dst.network.ifname, (char *)ifname, len); net->dst.network.ifname[len] = '\0'; } xmlFree(ifname); ifname = NULL; } } else if (net->type == QEMUD_NET_ETHERNET) { int len; if (script != NULL) { if ((len = xmlStrlen(script)) >= (PATH_MAX-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "TAP script path '%s' is too long", script); goto error; } else { strncpy(net->dst.ethernet.script, (char *)script, len); net->dst.ethernet.script[len] = '\0'; } xmlFree(script); script = NULL; } if (ifname != NULL) { if ((len = xmlStrlen(ifname)) >= (BR_IFNAME_MAXLEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "TAP interface name '%s' is too long", ifname); goto error; } else { strncpy(net->dst.ethernet.ifname, (char *)ifname, len); net->dst.ethernet.ifname[len] = '\0'; } xmlFree(ifname); } } else if (net->type == QEMUD_NET_BRIDGE) { int len; if (bridge == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "No 'dev' attribute specified with "); goto error; } else if ((len = xmlStrlen(bridge)) >= (BR_IFNAME_MAXLEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "TAP bridge path '%s' is too long", bridge); goto error; } else { strncpy(net->dst.bridge.brname, (char *)bridge, len); net->dst.bridge.brname[len] = '\0'; } xmlFree(bridge); bridge = NULL; if (ifname != NULL) { if ((len = xmlStrlen(ifname)) >= (BR_IFNAME_MAXLEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "TAP interface name '%s' is too long", ifname); goto error; } else { strncpy(net->dst.bridge.ifname, (char *)ifname, len); net->dst.bridge.ifname[len] = '\0'; } xmlFree(ifname); } } else if (net->type == QEMUD_NET_CLIENT || net->type == QEMUD_NET_SERVER || net->type == QEMUD_NET_MCAST) { int len; char *ret; if (port == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "No 'port' attribute specified with socket interface"); goto error; } if (!(net->dst.socket.port = strtol((char*)port, &ret, 10)) && ret == (char*)port) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Cannot parse 'port' attribute with socket interface"); goto error; } xmlFree(port); port = NULL; if (address == NULL) { if (net->type == QEMUD_NET_CLIENT || net->type == QEMUD_NET_MCAST) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "No 'address' attribute specified with socket interface"); goto error; } } else if ((len = xmlStrlen(address)) >= (BR_INET_ADDR_MAXLEN)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "IP address '%s' is too long", address); goto error; } if (address == NULL) { net->dst.socket.address[0] = '\0'; } else { strncpy(net->dst.socket.address, (char*)address,len); net->dst.socket.address[len] = '\0'; } xmlFree(address); } return net; error: if (network) xmlFree(network); if (address) xmlFree(address); if (port) xmlFree(port); if (ifname) xmlFree(ifname); if (script) xmlFree(script); if (bridge) xmlFree(bridge); free(net); return NULL; } /* Parse the XML definition for a network interface */ static struct qemud_vm_input_def *qemudParseInputXML(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, xmlNodePtr node) { struct qemud_vm_input_def *input = calloc(1, sizeof(struct qemud_vm_input_def)); xmlChar *type = NULL; xmlChar *bus = NULL; if (!input) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "input"); return NULL; } type = xmlGetProp(node, BAD_CAST "type"); bus = xmlGetProp(node, BAD_CAST "bus"); if (!type) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "no type provide for input device"); goto error; } if (!strcmp((const char *)type, "mouse")) { input->type = QEMU_INPUT_TYPE_MOUSE; } else if (!strcmp((const char *)type, "tablet")) { input->type = QEMU_INPUT_TYPE_TABLET; } else { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "unsupported input device type %s", (const char*)type); goto error; } if (bus) { if (!strcmp((const char*)bus, "ps2")) { /* Only allow mouse */ if (input->type == QEMU_INPUT_TYPE_TABLET) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "ps2 bus does not support %s input device", (const char*)type); goto error; } input->bus = QEMU_INPUT_BUS_PS2; } else if (!strcmp((const char *)bus, "usb")) { /* Allow mouse & keyboard */ input->bus = QEMU_INPUT_BUS_USB; } else { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "unsupported input bus %s", (const char*)bus); goto error; } } else { if (input->type == QEMU_INPUT_TYPE_MOUSE) input->bus = QEMU_INPUT_BUS_PS2; else input->bus = QEMU_INPUT_BUS_USB; } if (type) xmlFree(type); if (bus) xmlFree(bus); return input; error: if (type) xmlFree(type); if (bus) xmlFree(bus); free(input); return NULL; } /* * Parses a libvirt XML definition of a guest, and populates the * the qemud_vm struct with matching data about the guests config */ static struct qemud_vm_def *qemudParseXML(virConnectPtr conn, struct qemud_driver *driver, xmlDocPtr xml) { xmlNodePtr root = NULL; xmlChar *prop = NULL; xmlXPathContextPtr ctxt = NULL; xmlXPathObjectPtr obj = NULL; char *conv = NULL; int i; struct qemud_vm_def *def; if (!(def = calloc(1, sizeof(struct qemud_vm_def)))) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "xmlXPathContext"); return NULL; } /* Prepare parser / xpath context */ root = xmlDocGetRootElement(xml); if ((root == NULL) || (!xmlStrEqual(root->name, BAD_CAST "domain"))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "incorrect root element"); goto error; } ctxt = xmlXPathNewContext(xml); if (ctxt == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "xmlXPathContext"); goto error; } /* Find out what type of QEMU virtualization to use */ if (!(prop = xmlGetProp(root, BAD_CAST "type"))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "missing domain type attribute"); goto error; } if (!strcmp((char *)prop, "qemu")) def->virtType = QEMUD_VIRT_QEMU; else if (!strcmp((char *)prop, "kqemu")) def->virtType = QEMUD_VIRT_KQEMU; else if (!strcmp((char *)prop, "kvm")) def->virtType = QEMUD_VIRT_KVM; else { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "invalid domain type attribute"); goto error; } free(prop); prop = NULL; /* Extract domain name */ obj = xmlXPathEval(BAD_CAST "string(/domain/name[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_NAME, NULL); goto error; } if (strlen((const char *)obj->stringval) >= (QEMUD_MAX_NAME_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "domain name length too long"); goto error; } strcpy(def->name, (const char *)obj->stringval); xmlXPathFreeObject(obj); /* Extract domain uuid */ obj = xmlXPathEval(BAD_CAST "string(/domain/uuid[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { int err; if ((err = virUUIDGenerate(def->uuid))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Failed to generate UUID: %s", strerror(err)); goto error; } } else if (virUUIDParse((const char *)obj->stringval, def->uuid) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed uuid element"); goto error; } xmlXPathFreeObject(obj); /* Extract domain memory */ obj = xmlXPathEval(BAD_CAST "string(/domain/memory[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "missing memory element"); goto error; } else { conv = NULL; def->maxmem = strtoll((const char*)obj->stringval, &conv, 10); if (conv == (const char*)obj->stringval) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed memory information"); goto error; } } if (obj) xmlXPathFreeObject(obj); /* Extract domain memory */ obj = xmlXPathEval(BAD_CAST "string(/domain/currentMemory[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { def->memory = def->maxmem; } else { conv = NULL; def->memory = strtoll((const char*)obj->stringval, &conv, 10); if (def->memory > def->maxmem) def->memory = def->maxmem; if (conv == (const char*)obj->stringval) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed memory information"); goto error; } } if (obj) xmlXPathFreeObject(obj); /* Extract domain vcpu info */ obj = xmlXPathEval(BAD_CAST "string(/domain/vcpu[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { def->vcpus = 1; } else { conv = NULL; def->vcpus = strtoll((const char*)obj->stringval, &conv, 10); if (conv == (const char*)obj->stringval) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed vcpu information"); goto error; } } if (obj) xmlXPathFreeObject(obj); /* See if ACPI feature is requested */ obj = xmlXPathEval(BAD_CAST "/domain/features/acpi", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr == 1)) { def->features |= QEMUD_FEATURE_ACPI; } xmlXPathFreeObject(obj); /* See if we disable reboots */ obj = xmlXPathEval(BAD_CAST "string(/domain/on_reboot)", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { def->noReboot = 0; } else { if (!strcmp((char*)obj->stringval, "destroy")) def->noReboot = 1; else def->noReboot = 0; } if (obj) xmlXPathFreeObject(obj); /* See if we set clock to localtime */ obj = xmlXPathEval(BAD_CAST "string(/domain/clock/@offset)", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { def->localtime = 0; } else { if (!strcmp((char*)obj->stringval, "localtime")) def->localtime = 1; else def->localtime = 0; } if (obj) xmlXPathFreeObject(obj); /* Extract OS type info */ obj = xmlXPathEval(BAD_CAST "string(/domain/os/type[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OS_TYPE, NULL); goto error; } if (strcmp((const char *)obj->stringval, "hvm")) { qemudReportError(conn, NULL, NULL, VIR_ERR_OS_TYPE, "%s", obj->stringval); goto error; } strcpy(def->os.type, (const char *)obj->stringval); xmlXPathFreeObject(obj); obj = xmlXPathEval(BAD_CAST "string(/domain/os/type[1]/@arch)", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { const char *defaultArch = qemudDefaultArch(); if (strlen(defaultArch) >= (QEMUD_OS_TYPE_MAX_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "architecture type too long"); goto error; } strcpy(def->os.arch, defaultArch); } else { if (strlen((const char *)obj->stringval) >= (QEMUD_OS_TYPE_MAX_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "architecture type too long"); goto error; } strcpy(def->os.arch, (const char *)obj->stringval); } if (obj) xmlXPathFreeObject(obj); obj = xmlXPathEval(BAD_CAST "string(/domain/os/type[1]/@machine)", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { const char *defaultMachine = qemudDefaultMachineForArch(def->os.arch); if (strlen(defaultMachine) >= (QEMUD_OS_MACHINE_MAX_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "machine type too long"); goto error; } strcpy(def->os.machine, defaultMachine); } else { if (strlen((const char *)obj->stringval) >= (QEMUD_OS_MACHINE_MAX_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "architecture type too long"); goto error; } strcpy(def->os.machine, (const char *)obj->stringval); } if (obj) xmlXPathFreeObject(obj); obj = xmlXPathEval(BAD_CAST "string(/domain/os/kernel[1])", ctxt); if ((obj != NULL) && (obj->type == XPATH_STRING) && (obj->stringval != NULL) && (obj->stringval[0] != 0)) { if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "kernel path too long"); goto error; } strcpy(def->os.kernel, (const char *)obj->stringval); } if (obj) xmlXPathFreeObject(obj); obj = xmlXPathEval(BAD_CAST "string(/domain/os/initrd[1])", ctxt); if ((obj != NULL) && (obj->type == XPATH_STRING) && (obj->stringval != NULL) && (obj->stringval[0] != 0)) { if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "initrd path too long"); goto error; } strcpy(def->os.initrd, (const char *)obj->stringval); } if (obj) xmlXPathFreeObject(obj); obj = xmlXPathEval(BAD_CAST "string(/domain/os/cmdline[1])", ctxt); if ((obj != NULL) && (obj->type == XPATH_STRING) && (obj->stringval != NULL) && (obj->stringval[0] != 0)) { if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "cmdline arguments too long"); goto error; } strcpy(def->os.cmdline, (const char *)obj->stringval); } if (obj) xmlXPathFreeObject(obj); /* analysis of the disk devices */ obj = xmlXPathEval(BAD_CAST "/domain/os/boot", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) { for (i = 0; i < obj->nodesetval->nodeNr && i < QEMUD_MAX_BOOT_DEVS ; i++) { if (!(prop = xmlGetProp(obj->nodesetval->nodeTab[i], BAD_CAST "dev"))) continue; if (!strcmp((char *)prop, "hd")) { def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_DISK; } else if (!strcmp((char *)prop, "fd")) { def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_FLOPPY; } else if (!strcmp((char *)prop, "cdrom")) { def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_CDROM; } else if (!strcmp((char *)prop, "net")) { def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_NET; } else { goto error; } xmlFree(prop); prop = NULL; } } xmlXPathFreeObject(obj); if (def->os.nBootDevs == 0) { def->os.nBootDevs = 1; def->os.bootDevs[0] = QEMUD_BOOT_DISK; } obj = xmlXPathEval(BAD_CAST "string(/domain/devices/emulator[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { char *tmp = qemudLocateBinaryForArch(conn, driver, def->virtType, def->os.arch); if (!tmp) { goto error; } strcpy(def->os.binary, tmp); free(tmp); } else { if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "emulator path too long"); goto error; } strcpy(def->os.binary, (const char *)obj->stringval); } if (obj) xmlXPathFreeObject(obj); obj = xmlXPathEval(BAD_CAST "/domain/devices/graphics", ctxt); if ((obj == NULL) || (obj->type != XPATH_NODESET) || (obj->nodesetval == NULL) || (obj->nodesetval->nodeNr == 0)) { def->graphicsType = QEMUD_GRAPHICS_NONE; } else if ((prop = xmlGetProp(obj->nodesetval->nodeTab[0], BAD_CAST "type"))) { if (!strcmp((char *)prop, "vnc")) { xmlChar *vncport, *vnclisten; def->graphicsType = QEMUD_GRAPHICS_VNC; vncport = xmlGetProp(obj->nodesetval->nodeTab[0], BAD_CAST "port"); if (vncport) { conv = NULL; def->vncPort = strtoll((const char*)vncport, &conv, 10); } else { def->vncPort = -1; } vnclisten = xmlGetProp(obj->nodesetval->nodeTab[0], BAD_CAST "listen"); if (vnclisten && *vnclisten) strncpy(def->vncListen, (char *)vnclisten, BR_INET_ADDR_MAXLEN-1); else strcpy(def->vncListen, "127.0.0.1"); def->vncListen[BR_INET_ADDR_MAXLEN-1] = '\0'; xmlFree(vncport); xmlFree(vnclisten); } else if (!strcmp((char *)prop, "sdl")) { def->graphicsType = QEMUD_GRAPHICS_SDL; } else { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Unsupported graphics type %s", prop); goto error; } xmlFree(prop); prop = NULL; } xmlXPathFreeObject(obj); /* analysis of the disk devices */ obj = xmlXPathEval(BAD_CAST "/domain/devices/disk", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) { struct qemud_vm_disk_def *prev = NULL; for (i = 0; i < obj->nodesetval->nodeNr; i++) { struct qemud_vm_disk_def *disk; if (!(disk = qemudParseDiskXML(conn, driver, obj->nodesetval->nodeTab[i]))) { goto error; } def->ndisks++; disk->next = NULL; if (i == 0) { def->disks = disk; } else { prev->next = disk; } prev = disk; } } xmlXPathFreeObject(obj); /* analysis of the network devices */ obj = xmlXPathEval(BAD_CAST "/domain/devices/interface", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) { struct qemud_vm_net_def *prev = NULL; for (i = 0; i < obj->nodesetval->nodeNr; i++) { struct qemud_vm_net_def *net; if (!(net = qemudParseInterfaceXML(conn, driver, obj->nodesetval->nodeTab[i]))) { goto error; } def->nnets++; net->next = NULL; if (i == 0) { def->nets = net; } else { prev->next = net; } prev = net; } } xmlXPathFreeObject(obj); /* analysis of the input devices */ obj = xmlXPathEval(BAD_CAST "/domain/devices/input", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) { struct qemud_vm_input_def *prev = NULL; for (i = 0; i < obj->nodesetval->nodeNr; i++) { struct qemud_vm_input_def *input; if (!(input = qemudParseInputXML(conn, driver, obj->nodesetval->nodeTab[i]))) { goto error; } /* Mouse + PS/2 is implicit with graphics, so don't store it */ if (input->bus == QEMU_INPUT_BUS_PS2 && input->type == QEMU_INPUT_TYPE_MOUSE) { free(input); continue; } def->ninputs++; input->next = NULL; if (i == 0) { def->inputs = input; } else { prev->next = input; } prev = input; } } xmlXPathFreeObject(obj); obj = NULL; /* If graphics are enabled, there's an implicit PS2 mouse */ if (def->graphicsType != QEMUD_GRAPHICS_NONE) { int hasPS2mouse = 0; struct qemud_vm_input_def *input = def->inputs; while (input) { if (input->type == QEMU_INPUT_TYPE_MOUSE && input->bus == QEMU_INPUT_BUS_PS2) hasPS2mouse = 1; input = input->next; } if (!hasPS2mouse) { input = calloc(1, sizeof(struct qemud_vm_input_def)); if (!input) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "input"); goto error; } input->type = QEMU_INPUT_TYPE_MOUSE; input->bus = QEMU_INPUT_BUS_PS2; input->next = def->inputs; def->inputs = input; def->ninputs++; } } xmlXPathFreeContext(ctxt); return def; error: if (prop) free(prop); if (obj) xmlXPathFreeObject(obj); if (ctxt) xmlXPathFreeContext(ctxt); qemudFreeVMDef(def); return NULL; } static char * qemudNetworkIfaceConnect(virConnectPtr conn, struct qemud_driver *driver, struct qemud_vm *vm, struct qemud_vm_net_def *net, int vlan) { struct qemud_network *network = NULL; char *brname; char *ifname; char tapfdstr[4+3+32+7]; char *retval = NULL; int err; int tapfd = -1; int *tapfds; if (net->type == QEMUD_NET_NETWORK) { if (!(network = qemudFindNetworkByName(driver, net->dst.network.name))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Network '%s' not found", net->dst.network.name); goto error; } else if (network->bridge[0] == '\0') { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Network '%s' not active", net->dst.network.name); goto error; } brname = network->bridge; if (net->dst.network.ifname[0] == '\0' || strchr(net->dst.network.ifname, '%')) { strcpy(net->dst.network.ifname, "vnet%d"); } ifname = net->dst.network.ifname; } else if (net->type == QEMUD_NET_BRIDGE) { brname = net->dst.bridge.brname; if (net->dst.bridge.ifname[0] == '\0' || strchr(net->dst.bridge.ifname, '%')) { strcpy(net->dst.bridge.ifname, "vnet%d"); } ifname = net->dst.bridge.ifname; } else { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Network type %d is not supported", net->type); goto error; } if (!driver->brctl && (err = brInit(&driver->brctl))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot initialize bridge support: %s", strerror(err)); goto error; } if ((err = brAddTap(driver->brctl, brname, ifname, BR_IFNAME_MAXLEN, &tapfd))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Failed to add tap interface '%s' to bridge '%s' : %s", ifname, brname, strerror(err)); goto error; } snprintf(tapfdstr, sizeof(tapfdstr), "tap,fd=%d,script=,vlan=%d", tapfd, vlan); if (!(retval = strdup(tapfdstr))) goto no_memory; if (!(tapfds = realloc(vm->tapfds, sizeof(int) * (vm->ntapfds+2)))) goto no_memory; vm->tapfds = tapfds; vm->tapfds[vm->ntapfds++] = tapfd; vm->tapfds[vm->ntapfds] = -1; return retval; no_memory: qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "tapfds"); error: if (retval) free(retval); if (tapfd != -1) close(tapfd); return NULL; } /* * Constructs a argv suitable for launching qemu with config defined * for a given virtual machine. */ int qemudBuildCommandLine(virConnectPtr conn, struct qemud_driver *driver, struct qemud_vm *vm, char ***argv) { int len, n = -1, i; char memory[50]; char vcpus[50]; char boot[QEMUD_MAX_BOOT_DEVS+1]; struct stat sb; struct qemud_vm_disk_def *disk = vm->def->disks; struct qemud_vm_net_def *net = vm->def->nets; struct qemud_vm_input_def *input = vm->def->inputs; struct utsname ut; int disableKQEMU = 0; if (qemudExtractVersion(conn, driver) < 0) return -1; uname(&ut); /* Nasty hack make i?86 look like i686 to simplify next comparison */ if (ut.machine[0] == 'i' && ut.machine[2] == '8' && ut.machine[3] == '6' && !ut.machine[4]) ut.machine[1] = '6'; /* Need to explicitly disable KQEMU if * 1. Arch matches host arch * 2. Guest is 'qemu' * 3. The qemu binary has the -no-kqemu flag */ if ((driver->qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU) && !strcmp(ut.machine, vm->def->os.arch) && vm->def->virtType == QEMUD_VIRT_QEMU) disableKQEMU = 1; /* Make sure the binary we are about to try exec'ing exists. * Technically we could catch the exec() failure, but that's * in a sub-process so its hard to feed back a useful error */ if (stat(vm->def->os.binary, &sb) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Cannot find QEMU binary %s: %s", vm->def->os.binary, strerror(errno)); return -1; } len = 1 + /* qemu */ 2 + /* machine type */ disableKQEMU + /* Disable kqemu */ 2 * vm->def->ndisks + /* disks*/ (vm->def->nnets > 0 ? (4 * vm->def->nnets) : 2) + /* networks */ 1 + /* usb */ 2 * vm->def->ninputs + /* input devices */ 2 + /* memory*/ 2 + /* cpus */ 2 + /* boot device */ 2 + /* monitor */ (vm->def->localtime ? 1 : 0) + /* localtime */ (driver->qemuCmdFlags & QEMUD_CMD_FLAG_NO_REBOOT && vm->def->noReboot ? 1 : 0) + /* no-reboot */ (vm->def->features & QEMUD_FEATURE_ACPI ? 0 : 1) + /* acpi */ (vm->def->os.kernel[0] ? 2 : 0) + /* kernel */ (vm->def->os.initrd[0] ? 2 : 0) + /* initrd */ (vm->def->os.cmdline[0] ? 2 : 0) + /* cmdline */ (vm->def->graphicsType == QEMUD_GRAPHICS_VNC ? 2 : (vm->def->graphicsType == QEMUD_GRAPHICS_SDL ? 0 : 1)); /* graphics */ snprintf(memory, sizeof(memory), "%d", vm->def->memory/1024); snprintf(vcpus, sizeof(vcpus), "%d", vm->def->vcpus); if (!(*argv = malloc(sizeof(char *) * (len+1)))) goto no_memory; if (!((*argv)[++n] = strdup(vm->def->os.binary))) goto no_memory; if (!((*argv)[++n] = strdup("-M"))) goto no_memory; if (!((*argv)[++n] = strdup(vm->def->os.machine))) goto no_memory; if (disableKQEMU) { if (!((*argv)[++n] = strdup("-no-kqemu"))) goto no_memory; } if (!((*argv)[++n] = strdup("-m"))) goto no_memory; if (!((*argv)[++n] = strdup(memory))) goto no_memory; if (!((*argv)[++n] = strdup("-smp"))) goto no_memory; if (!((*argv)[++n] = strdup(vcpus))) goto no_memory; /* * NB, -nographic *MUST* come before any serial, or monitor * or parallel port flags due to QEMU craziness, where it * decides to change the serial port & monitor to be on stdout * if you ask for nographic. So we have to make sure we override * these defaults ourselves... */ if (vm->def->graphicsType == QEMUD_GRAPHICS_NONE) { if (!((*argv)[++n] = strdup("-nographic"))) goto no_memory; } if (!((*argv)[++n] = strdup("-monitor"))) goto no_memory; if (!((*argv)[++n] = strdup("pty"))) goto no_memory; if (vm->def->localtime) { if (!((*argv)[++n] = strdup("-localtime"))) goto no_memory; } if (driver->qemuCmdFlags & QEMUD_CMD_FLAG_NO_REBOOT && vm->def->noReboot) { if (!((*argv)[++n] = strdup("-no-reboot"))) goto no_memory; } if (!(vm->def->features & QEMUD_FEATURE_ACPI)) { if (!((*argv)[++n] = strdup("-no-acpi"))) goto no_memory; } for (i = 0 ; i < vm->def->os.nBootDevs ; i++) { switch (vm->def->os.bootDevs[i]) { case QEMUD_BOOT_CDROM: boot[i] = 'd'; break; case QEMUD_BOOT_FLOPPY: boot[i] = 'a'; break; case QEMUD_BOOT_DISK: boot[i] = 'c'; break; case QEMUD_BOOT_NET: boot[i] = 'n'; break; default: boot[i] = 'c'; break; } } boot[vm->def->os.nBootDevs] = '\0'; if (!((*argv)[++n] = strdup("-boot"))) goto no_memory; if (!((*argv)[++n] = strdup(boot))) goto no_memory; if (vm->def->os.kernel[0]) { if (!((*argv)[++n] = strdup("-kernel"))) goto no_memory; if (!((*argv)[++n] = strdup(vm->def->os.kernel))) goto no_memory; } if (vm->def->os.initrd[0]) { if (!((*argv)[++n] = strdup("-initrd"))) goto no_memory; if (!((*argv)[++n] = strdup(vm->def->os.initrd))) goto no_memory; } if (vm->def->os.cmdline[0]) { if (!((*argv)[++n] = strdup("-append"))) goto no_memory; if (!((*argv)[++n] = strdup(vm->def->os.cmdline))) goto no_memory; } while (disk) { char dev[NAME_MAX]; char file[PATH_MAX]; if (!strcmp(disk->dst, "hdc") && disk->device == QEMUD_DISK_CDROM) snprintf(dev, NAME_MAX, "-%s", "cdrom"); else snprintf(dev, NAME_MAX, "-%s", disk->dst); snprintf(file, PATH_MAX, "%s", disk->src); if (!((*argv)[++n] = strdup(dev))) goto no_memory; if (!((*argv)[++n] = strdup(file))) goto no_memory; disk = disk->next; } if (!net) { if (!((*argv)[++n] = strdup("-net"))) goto no_memory; if (!((*argv)[++n] = strdup("none"))) goto no_memory; } else { int vlan = 0; while (net) { char nic[100]; if (snprintf(nic, sizeof(nic), "nic,macaddr=%02x:%02x:%02x:%02x:%02x:%02x,vlan=%d", net->mac[0], net->mac[1], net->mac[2], net->mac[3], net->mac[4], net->mac[5], vlan) >= sizeof(nic)) goto error; if (!((*argv)[++n] = strdup("-net"))) goto no_memory; if (!((*argv)[++n] = strdup(nic))) goto no_memory; if (!((*argv)[++n] = strdup("-net"))) goto no_memory; switch (net->type) { case QEMUD_NET_NETWORK: case QEMUD_NET_BRIDGE: if (!((*argv)[++n] = qemudNetworkIfaceConnect(conn, driver, vm, net, vlan))) goto error; break; case QEMUD_NET_ETHERNET: { char arg[PATH_MAX]; if (snprintf(arg, PATH_MAX-1, "tap,ifname=%s,script=%s,vlan=%d", net->dst.ethernet.ifname, net->dst.ethernet.script, vlan) >= (PATH_MAX-1)) goto error; if (!((*argv)[++n] = strdup(arg))) goto no_memory; } break; case QEMUD_NET_CLIENT: case QEMUD_NET_SERVER: case QEMUD_NET_MCAST: { char arg[PATH_MAX]; const char *mode = NULL; switch (net->type) { case QEMUD_NET_CLIENT: mode = "connect"; break; case QEMUD_NET_SERVER: mode = "listen"; break; case QEMUD_NET_MCAST: mode = "mcast"; break; } if (snprintf(arg, PATH_MAX-1, "socket,%s=%s:%d,vlan=%d", mode, net->dst.socket.address, net->dst.socket.port, vlan) >= (PATH_MAX-1)) goto error; if (!((*argv)[++n] = strdup(arg))) goto no_memory; } break; case QEMUD_NET_USER: default: { char arg[PATH_MAX]; if (snprintf(arg, PATH_MAX-1, "user,vlan=%d", vlan) >= (PATH_MAX-1)) goto error; if (!((*argv)[++n] = strdup(arg))) goto no_memory; } } net = net->next; vlan++; } } if (!((*argv)[++n] = strdup("-usb"))) goto no_memory; while (input) { if (input->bus == QEMU_INPUT_BUS_USB) { if (!((*argv)[++n] = strdup("-usbdevice"))) goto no_memory; if (!((*argv)[++n] = strdup(input->type == QEMU_INPUT_TYPE_MOUSE ? "mouse" : "tablet"))) goto no_memory; } input = input->next; } if (vm->def->graphicsType == QEMUD_GRAPHICS_VNC) { char vncdisplay[BR_INET_ADDR_MAXLEN+20]; int ret; if (driver->qemuCmdFlags & QEMUD_CMD_FLAG_VNC_COLON) ret = snprintf(vncdisplay, sizeof(vncdisplay), "%s:%d", vm->def->vncListen, vm->def->vncActivePort - 5900); else ret = snprintf(vncdisplay, sizeof(vncdisplay), "%d", vm->def->vncActivePort - 5900); if (ret < 0 || ret >= (int)sizeof(vncdisplay)) goto error; if (!((*argv)[++n] = strdup("-vnc"))) goto no_memory; if (!((*argv)[++n] = strdup(vncdisplay))) goto no_memory; } else if (vm->def->graphicsType == QEMUD_GRAPHICS_NONE) { /* Nada - we added -nographic earlier in this function */ } else { /* SDL is the default. no args needed */ } (*argv)[++n] = NULL; return 0; no_memory: qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "argv"); error: if (vm->tapfds) { for (i = 0; vm->tapfds[i] != -1; i++) close(vm->tapfds[i]); free(vm->tapfds); vm->tapfds = NULL; vm->ntapfds = 0; } if (argv) { for (i = 0 ; i < n ; i++) free((*argv)[i]); free(*argv); } return -1; } /* Save a guest's config data into a persistent file */ static int qemudSaveConfig(virConnectPtr conn, struct qemud_driver *driver, struct qemud_vm *vm, struct qemud_vm_def *def) { char *xml; int fd = -1, ret = -1; int towrite; if (!(xml = qemudGenerateXML(conn, driver, vm, def, 0))) return -1; if ((fd = open(vm->configFile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR )) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot create config file %s: %s", vm->configFile, strerror(errno)); goto cleanup; } towrite = strlen(xml); if (write(fd, xml, towrite) != towrite) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot write config file %s: %s", vm->configFile, strerror(errno)); goto cleanup; } if (close(fd) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot save config file %s: %s", vm->configFile, strerror(errno)); goto cleanup; } ret = 0; cleanup: if (fd != -1) close(fd); free(xml); return ret; } struct qemud_vm_def * qemudParseVMDef(virConnectPtr conn, struct qemud_driver *driver, const char *xmlStr, const char *displayName) { xmlDocPtr xml; struct qemud_vm_def *def = NULL; if (!(xml = xmlReadDoc(BAD_CAST xmlStr, displayName ? displayName : "domain.xml", NULL, XML_PARSE_NOENT | XML_PARSE_NONET | XML_PARSE_NOERROR | XML_PARSE_NOWARNING))) { qemudReportError(conn, NULL, NULL, VIR_ERR_XML_ERROR, NULL); return NULL; } def = qemudParseXML(conn, driver, xml); xmlFreeDoc(xml); return def; } struct qemud_vm * qemudAssignVMDef(virConnectPtr conn, struct qemud_driver *driver, struct qemud_vm_def *def) { struct qemud_vm *vm = NULL; if ((vm = qemudFindVMByName(driver, def->name))) { if (!qemudIsActiveVM(vm)) { qemudFreeVMDef(vm->def); vm->def = def; } else { if (vm->newDef) qemudFreeVMDef(vm->newDef); vm->newDef = def; } return vm; } if (!(vm = calloc(1, sizeof(struct qemud_vm)))) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "vm"); return NULL; } vm->stdout = -1; vm->stderr = -1; vm->monitor = -1; vm->pid = -1; vm->id = -1; vm->state = VIR_DOMAIN_SHUTOFF; vm->def = def; vm->next = driver->vms; driver->vms = vm; driver->ninactivevms++; return vm; } void qemudRemoveInactiveVM(struct qemud_driver *driver, struct qemud_vm *vm) { struct qemud_vm *prev = NULL, *curr; curr = driver->vms; while (curr != vm) { prev = curr; curr = curr->next; } if (curr) { if (prev) prev->next = curr->next; else driver->vms = curr->next; driver->ninactivevms--; } qemudFreeVM(vm); } int qemudSaveVMDef(virConnectPtr conn, struct qemud_driver *driver, struct qemud_vm *vm, struct qemud_vm_def *def) { if (vm->configFile[0] == '\0') { int err; if ((err = qemudEnsureDir(driver->configDir))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot create config directory %s: %s", driver->configDir, strerror(err)); return -1; } if (qemudMakeConfigPath(driver->configDir, def->name, ".xml", vm->configFile, PATH_MAX) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot construct config file path"); return -1; } if (qemudMakeConfigPath(driver->autostartDir, def->name, ".xml", vm->autostartLink, PATH_MAX) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot construct autostart link path"); vm->configFile[0] = '\0'; return -1; } } return qemudSaveConfig(conn, driver, vm, def); } static int qemudSaveNetworkConfig(virConnectPtr conn, struct qemud_driver *driver, struct qemud_network *network, struct qemud_network_def *def) { char *xml; int fd, ret = -1; int towrite; int err; if (!(xml = qemudGenerateNetworkXML(conn, driver, network, def))) { return -1; } if ((err = qemudEnsureDir(driver->networkConfigDir))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot create config directory %s: %s", driver->networkConfigDir, strerror(err)); goto cleanup; } if ((fd = open(network->configFile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR )) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot create config file %s: %s", network->configFile, strerror(errno)); goto cleanup; } towrite = strlen(xml); if (write(fd, xml, towrite) != towrite) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot write config file %s: %s", network->configFile, strerror(errno)); goto cleanup; } if (close(fd) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot save config file %s: %s", network->configFile, strerror(errno)); goto cleanup; } ret = 0; cleanup: free(xml); return ret; } void qemudFreeNetworkDef(struct qemud_network_def *def) { struct qemud_dhcp_range_def *range = def->ranges; while (range) { struct qemud_dhcp_range_def *next = range->next; free(range); range = next; } free(def); } void qemudFreeNetwork(struct qemud_network *network) { qemudFreeNetworkDef(network->def); if (network->newDef) qemudFreeNetworkDef(network->newDef); free(network); } static int qemudParseBridgeXML(struct qemud_driver *driver ATTRIBUTE_UNUSED, struct qemud_network_def *def, xmlNodePtr node) { xmlChar *name, *stp, *delay; name = xmlGetProp(node, BAD_CAST "name"); if (name != NULL) { strncpy(def->bridge, (const char *)name, IF_NAMESIZE-1); def->bridge[IF_NAMESIZE-1] = '\0'; xmlFree(name); name = NULL; } stp = xmlGetProp(node, BAD_CAST "stp"); if (stp != NULL) { if (xmlStrEqual(stp, BAD_CAST "off")) { def->disableSTP = 1; } xmlFree(stp); stp = NULL; } delay = xmlGetProp(node, BAD_CAST "delay"); if (delay != NULL) { def->forwardDelay = strtol((const char *)delay, NULL, 10); xmlFree(delay); delay = NULL; } return 1; } static int qemudParseDhcpRangesXML(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, struct qemud_network_def *def, xmlNodePtr node) { xmlNodePtr cur; cur = node->children; while (cur != NULL) { struct qemud_dhcp_range_def *range; xmlChar *start, *end; if (cur->type != XML_ELEMENT_NODE || !xmlStrEqual(cur->name, BAD_CAST "range")) { cur = cur->next; continue; } if (!(range = calloc(1, sizeof(struct qemud_dhcp_range_def)))) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "range"); return 0; } start = xmlGetProp(cur, BAD_CAST "start"); end = xmlGetProp(cur, BAD_CAST "end"); if (start && start[0] && end && end[0]) { strncpy(range->start, (const char *)start, BR_INET_ADDR_MAXLEN-1); range->start[BR_INET_ADDR_MAXLEN-1] = '\0'; strncpy(range->end, (const char *)end, BR_INET_ADDR_MAXLEN-1); range->end[BR_INET_ADDR_MAXLEN-1] = '\0'; range->next = def->ranges; def->ranges = range; def->nranges++; } else { free(range); } if (start) xmlFree(start); if (end) xmlFree(end); cur = cur->next; } return 1; } static int qemudParseInetXML(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, struct qemud_network_def *def, xmlNodePtr node) { xmlChar *address, *netmask; xmlNodePtr cur; address = xmlGetProp(node, BAD_CAST "address"); if (address != NULL) { strncpy(def->ipAddress, (const char *)address, BR_INET_ADDR_MAXLEN-1); def->ipAddress[BR_INET_ADDR_MAXLEN-1] = '\0'; xmlFree(address); address = NULL; } netmask = xmlGetProp(node, BAD_CAST "netmask"); if (netmask != NULL) { strncpy(def->netmask, (const char *)netmask, BR_INET_ADDR_MAXLEN-1); def->netmask[BR_INET_ADDR_MAXLEN-1] = '\0'; xmlFree(netmask); netmask = NULL; } if (def->ipAddress[0] && def->netmask[0]) { struct in_addr inaddress, innetmask; char *netaddr; inet_aton((const char*)def->ipAddress, &inaddress); inet_aton((const char*)def->netmask, &innetmask); inaddress.s_addr &= innetmask.s_addr; netaddr = inet_ntoa(inaddress); snprintf(def->network,sizeof(def->network)-1, "%s/%s", netaddr, (const char *)def->netmask); } cur = node->children; while (cur != NULL) { if (cur->type == XML_ELEMENT_NODE && xmlStrEqual(cur->name, BAD_CAST "dhcp") && !qemudParseDhcpRangesXML(conn, driver, def, cur)) return 0; cur = cur->next; } return 1; } static struct qemud_network_def *qemudParseNetworkXML(virConnectPtr conn, struct qemud_driver *driver, xmlDocPtr xml) { xmlNodePtr root = NULL; xmlXPathContextPtr ctxt = NULL; xmlXPathObjectPtr obj = NULL, tmp = NULL; struct qemud_network_def *def; if (!(def = calloc(1, sizeof(struct qemud_network_def)))) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "network_def"); return NULL; } /* Prepare parser / xpath context */ root = xmlDocGetRootElement(xml); if ((root == NULL) || (!xmlStrEqual(root->name, BAD_CAST "network"))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "incorrect root element"); goto error; } ctxt = xmlXPathNewContext(xml); if (ctxt == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "xmlXPathContext"); goto error; } /* Extract network name */ obj = xmlXPathEval(BAD_CAST "string(/network/name[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_NAME, NULL); goto error; } if (strlen((const char *)obj->stringval) >= (QEMUD_MAX_NAME_LEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "network name length too long"); goto error; } strcpy(def->name, (const char *)obj->stringval); xmlXPathFreeObject(obj); /* Extract network uuid */ obj = xmlXPathEval(BAD_CAST "string(/network/uuid[1])", ctxt); if ((obj == NULL) || (obj->type != XPATH_STRING) || (obj->stringval == NULL) || (obj->stringval[0] == 0)) { int err; if ((err = virUUIDGenerate(def->uuid))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Failed to generate UUID: %s", strerror(err)); goto error; } } else if (virUUIDParse((const char *)obj->stringval, def->uuid) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed uuid element"); goto error; } xmlXPathFreeObject(obj); /* Parse bridge information */ obj = xmlXPathEval(BAD_CAST "/network/bridge[1]", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr > 0)) { if (!qemudParseBridgeXML(driver, def, obj->nodesetval->nodeTab[0])) { goto error; } } xmlXPathFreeObject(obj); /* Parse IP information */ obj = xmlXPathEval(BAD_CAST "/network/ip[1]", ctxt); if ((obj != NULL) && (obj->type == XPATH_NODESET) && (obj->nodesetval != NULL) && (obj->nodesetval->nodeNr > 0)) { if (!qemudParseInetXML(conn, driver, def, obj->nodesetval->nodeTab[0])) { goto error; } } xmlXPathFreeObject(obj); /* IPv4 forwarding setup */ obj = xmlXPathEval(BAD_CAST "count(/network/forward) > 0", ctxt); if ((obj != NULL) && (obj->type == XPATH_BOOLEAN) && obj->boolval) { if (!def->ipAddress[0] || !def->netmask[0]) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Forwarding requested, but no IPv4 address/netmask provided"); goto error; } def->forward = 1; tmp = xmlXPathEval(BAD_CAST "string(/network/forward[1]/@dev)", ctxt); if ((tmp != NULL) && (tmp->type == XPATH_STRING) && (tmp->stringval != NULL) && (tmp->stringval[0] != 0)) { int len; if ((len = xmlStrlen(tmp->stringval)) >= (BR_IFNAME_MAXLEN-1)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "forward device name '%s' is too long", (char*)tmp->stringval); goto error; } strcpy(def->forwardDev, (char*)tmp->stringval); } else { def->forwardDev[0] = '\0'; } xmlXPathFreeObject(tmp); tmp = NULL; } else { def->forward = 0; } xmlXPathFreeObject(obj); xmlXPathFreeContext(ctxt); return def; error: /* XXX free all the stuff in the qemud_network struct, or leave it upto the caller ? */ if (obj) xmlXPathFreeObject(obj); if (tmp) xmlXPathFreeObject(tmp); if (ctxt) xmlXPathFreeContext(ctxt); qemudFreeNetworkDef(def); return NULL; } struct qemud_network_def * qemudParseNetworkDef(virConnectPtr conn, struct qemud_driver *driver, const char *xmlStr, const char *displayName) { xmlDocPtr xml; struct qemud_network_def *def; if (!(xml = xmlReadDoc(BAD_CAST xmlStr, displayName ? displayName : "network.xml", NULL, XML_PARSE_NOENT | XML_PARSE_NONET | XML_PARSE_NOERROR | XML_PARSE_NOWARNING))) { qemudReportError(conn, NULL, NULL, VIR_ERR_XML_ERROR, NULL); return NULL; } def = qemudParseNetworkXML(conn, driver, xml); xmlFreeDoc(xml); return def; } struct qemud_network * qemudAssignNetworkDef(virConnectPtr conn, struct qemud_driver *driver, struct qemud_network_def *def) { struct qemud_network *network; if ((network = qemudFindNetworkByName(driver, def->name))) { if (!qemudIsActiveNetwork(network)) { qemudFreeNetworkDef(network->def); network->def = def; } else { if (network->newDef) qemudFreeNetworkDef(network->newDef); network->newDef = def; } return network; } if (!(network = calloc(1, sizeof(struct qemud_network)))) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "network"); return NULL; } network->def = def; network->next = driver->networks; driver->networks = network; driver->ninactivenetworks++; return network; } void qemudRemoveInactiveNetwork(struct qemud_driver *driver, struct qemud_network *network) { struct qemud_network *prev = NULL, *curr; curr = driver->networks; while (curr != network) { prev = curr; curr = curr->next; } if (curr) { if (prev) prev->next = curr->next; else driver->networks = curr->next; driver->ninactivenetworks--; } qemudFreeNetwork(network); } int qemudSaveNetworkDef(virConnectPtr conn, struct qemud_driver *driver, struct qemud_network *network, struct qemud_network_def *def) { if (network->configFile[0] == '\0') { int err; if ((err = qemudEnsureDir(driver->networkConfigDir))) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot create config directory %s: %s", driver->networkConfigDir, strerror(err)); return -1; } if (qemudMakeConfigPath(driver->networkConfigDir, def->name, ".xml", network->configFile, PATH_MAX) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot construct config file path"); return -1; } if (qemudMakeConfigPath(driver->networkAutostartDir, def->name, ".xml", network->autostartLink, PATH_MAX) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot construct autostart link path"); network->configFile[0] = '\0'; return -1; } } return qemudSaveNetworkConfig(conn, driver, network, def); } static int qemudReadFile(const char *path, char *buf, int maxlen) { FILE *fh; struct stat st; int ret = 0; if (!(fh = fopen(path, "r"))) { qemudLog(QEMUD_WARN, "Failed to open file '%s': %s", path, strerror(errno)); goto error; } if (fstat(fileno(fh), &st) < 0) { qemudLog(QEMUD_WARN, "Failed to stat file '%s': %s", path, strerror(errno)); goto error; } if (S_ISDIR(st.st_mode)) { qemudDebug("Ignoring directory '%s' - clearly not a config file", path); goto error; } if (st.st_size >= maxlen) { qemudLog(QEMUD_WARN, "File '%s' is too large", path); goto error; } if ((ret = fread(buf, st.st_size, 1, fh)) != 1) { qemudLog(QEMUD_WARN, "Failed to read config file '%s': %s", path, strerror(errno)); goto error; } buf[st.st_size] = '\0'; ret = 1; error: if (fh) fclose(fh); return ret; } static int compareFileToNameSuffix(const char *file, const char *name, const char *suffix) { int filelen = strlen(file); int namelen = strlen(name); int suffixlen = strlen(suffix); if (filelen == (namelen + suffixlen) && !strncmp(file, name, namelen) && !strncmp(file + namelen, suffix, suffixlen)) return 1; else return 0; } static int hasSuffix(const char *str, const char *suffix) { int len = strlen(str); int suffixlen = strlen(suffix); if (len < suffixlen) return 0; return strcmp(str + len - suffixlen, suffix) == 0; } static int checkLinkPointsTo(const char *checkLink, const char *checkDest) { char dest[PATH_MAX]; char real[PATH_MAX]; char checkReal[PATH_MAX]; int n; int passed = 0; /* read the link destination */ if ((n = readlink(checkLink, dest, PATH_MAX)) < 0) { switch (errno) { case ENOENT: case ENOTDIR: break; case EINVAL: qemudLog(QEMUD_WARN, "Autostart file '%s' is not a symlink", checkLink); break; default: qemudLog(QEMUD_WARN, "Failed to read autostart symlink '%s': %s", checkLink, strerror(errno)); break; } goto failed; } else if (n >= PATH_MAX) { qemudLog(QEMUD_WARN, "Symlink '%s' contents too long to fit in buffer", checkLink); goto failed; } dest[n] = '\0'; /* make absolute */ if (dest[0] != '/') { char dir[PATH_MAX]; char tmp[PATH_MAX]; char *p; strncpy(dir, checkLink, PATH_MAX); dir[PATH_MAX] = '\0'; if (!(p = strrchr(dir, '/'))) { qemudLog(QEMUD_WARN, "Symlink path '%s' is not absolute", checkLink); goto failed; } if (p == dir) /* handle unlikely root dir case */ p++; *p = '\0'; if (qemudMakeConfigPath(dir, dest, NULL, tmp, PATH_MAX) < 0) { qemudLog(QEMUD_WARN, "Path '%s/%s' is too long", dir, dest); goto failed; } strncpy(dest, tmp, PATH_MAX); dest[PATH_MAX] = '\0'; } /* canonicalize both paths */ if (!realpath(dest, real)) { qemudLog(QEMUD_WARN, "Failed to expand path '%s' :%s", dest, strerror(errno)); strncpy(real, dest, PATH_MAX); real[PATH_MAX] = '\0'; } if (!realpath(checkDest, checkReal)) { qemudLog(QEMUD_WARN, "Failed to expand path '%s' :%s", checkDest, strerror(errno)); strncpy(checkReal, checkDest, PATH_MAX); checkReal[PATH_MAX] = '\0'; } /* compare */ if (strcmp(checkReal, real) != 0) { qemudLog(QEMUD_WARN, "Autostart link '%s' is not a symlink to '%s', ignoring", checkLink, checkReal); goto failed; } passed = 1; failed: return passed; } static struct qemud_vm * qemudLoadConfig(struct qemud_driver *driver, const char *file, const char *path, const char *xml, const char *autostartLink) { struct qemud_vm_def *def; struct qemud_vm *vm; if (!(def = qemudParseVMDef(NULL, driver, xml, file))) { virErrorPtr err = virGetLastError(); qemudLog(QEMUD_WARN, "Error parsing QEMU guest config '%s' : %s", path, err->message); return NULL; } if (!compareFileToNameSuffix(file, def->name, ".xml")) { qemudLog(QEMUD_WARN, "QEMU guest config filename '%s' does not match guest name '%s'", path, def->name); qemudFreeVMDef(def); return NULL; } if (!(vm = qemudAssignVMDef(NULL, driver, def))) { qemudLog(QEMUD_WARN, "Failed to load QEMU guest config '%s': out of memory", path); qemudFreeVMDef(def); return NULL; } strncpy(vm->configFile, path, PATH_MAX); vm->configFile[PATH_MAX-1] = '\0'; strncpy(vm->autostartLink, autostartLink, PATH_MAX); vm->autostartLink[PATH_MAX-1] = '\0'; vm->autostart = checkLinkPointsTo(vm->autostartLink, vm->configFile); return vm; } static struct qemud_network * qemudLoadNetworkConfig(struct qemud_driver *driver, const char *file, const char *path, const char *xml, const char *autostartLink) { struct qemud_network_def *def; struct qemud_network *network; if (!(def = qemudParseNetworkDef(NULL, driver, xml, file))) { virErrorPtr err = virGetLastError(); qemudLog(QEMUD_WARN, "Error parsing network config '%s' : %s", path, err->message); return NULL; } if (!compareFileToNameSuffix(file, def->name, ".xml")) { qemudLog(QEMUD_WARN, "Network config filename '%s' does not match network name '%s'", path, def->name); qemudFreeNetworkDef(def); return NULL; } if (!(network = qemudAssignNetworkDef(NULL, driver, def))) { qemudLog(QEMUD_WARN, "Failed to load network config '%s': out of memory", path); qemudFreeNetworkDef(def); return NULL; } strncpy(network->configFile, path, PATH_MAX); network->configFile[PATH_MAX-1] = '\0'; strncpy(network->autostartLink, autostartLink, PATH_MAX); network->autostartLink[PATH_MAX-1] = '\0'; network->autostart = checkLinkPointsTo(network->autostartLink, network->configFile); return network; } static int qemudScanConfigDir(struct qemud_driver *driver, const char *configDir, const char *autostartDir, int isGuest) { DIR *dir; struct dirent *entry; if (!(dir = opendir(configDir))) { if (errno == ENOENT) return 0; qemudLog(QEMUD_ERR, "Failed to open dir '%s': %s", configDir, strerror(errno)); return -1; } while ((entry = readdir(dir))) { char xml[QEMUD_MAX_XML_LEN]; char path[PATH_MAX]; char autostartLink[PATH_MAX]; if (entry->d_name[0] == '.') continue; if (!hasSuffix(entry->d_name, ".xml")) continue; if (qemudMakeConfigPath(configDir, entry->d_name, NULL, path, PATH_MAX) < 0) { qemudLog(QEMUD_WARN, "Config filename '%s/%s' is too long", configDir, entry->d_name); continue; } if (qemudMakeConfigPath(autostartDir, entry->d_name, NULL, autostartLink, PATH_MAX) < 0) { qemudLog(QEMUD_WARN, "Autostart link path '%s/%s' is too long", autostartDir, entry->d_name); continue; } if (!qemudReadFile(path, xml, QEMUD_MAX_XML_LEN)) continue; if (isGuest) qemudLoadConfig(driver, entry->d_name, path, xml, autostartLink); else qemudLoadNetworkConfig(driver, entry->d_name, path, xml, autostartLink); } closedir(dir); return 0; } /* Scan for all guest and network config files */ int qemudScanConfigs(struct qemud_driver *driver) { if (qemudScanConfigDir(driver, driver->configDir, driver->autostartDir, 1) < 0) return -1; if (qemudScanConfigDir(driver, driver->networkConfigDir, driver->networkAutostartDir, 0) < 0) return -1; return 0; } /* Generate an XML document describing the guest's configuration */ char *qemudGenerateXML(virConnectPtr conn, struct qemud_driver *driver ATTRIBUTE_UNUSED, struct qemud_vm *vm, struct qemud_vm_def *def, int live) { virBufferPtr buf = 0; unsigned char *uuid; struct qemud_vm_disk_def *disk; struct qemud_vm_net_def *net; struct qemud_vm_input_def *input; const char *type = NULL; int n; buf = virBufferNew (QEMUD_MAX_XML_LEN); if (!buf) goto no_memory; switch (def->virtType) { case QEMUD_VIRT_QEMU: type = "qemu"; break; case QEMUD_VIRT_KQEMU: type = "kqemu"; break; case QEMUD_VIRT_KVM: type = "kvm"; break; } if (!type) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "unexpected domain type %d", def->virtType); goto cleanup; } if (qemudIsActiveVM(vm) && live) { if (virBufferVSprintf(buf, "\n", type, vm->id) < 0) goto no_memory; } else { if (virBufferVSprintf(buf, "\n", type) < 0) goto no_memory; } if (virBufferVSprintf(buf, " %s\n", def->name) < 0) goto no_memory; uuid = def->uuid; if (virBufferVSprintf(buf, " %02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n", uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7], uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14], uuid[15]) < 0) goto no_memory; if (virBufferVSprintf(buf, " %d\n", def->maxmem) < 0) goto no_memory; if (virBufferVSprintf(buf, " %d\n", def->memory) < 0) goto no_memory; if (virBufferVSprintf(buf, " %d\n", def->vcpus) < 0) goto no_memory; if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; if (def->virtType == QEMUD_VIRT_QEMU) { if (virBufferVSprintf(buf, " %s\n", def->os.arch, def->os.machine, def->os.type) < 0) goto no_memory; } else { if (virBufferVSprintf(buf, " %s\n", def->os.type) < 0) goto no_memory; } if (def->os.kernel[0]) if (virBufferVSprintf(buf, " %s\n", def->os.kernel) < 0) goto no_memory; if (def->os.initrd[0]) if (virBufferVSprintf(buf, " %s\n", def->os.initrd) < 0) goto no_memory; if (def->os.cmdline[0]) if (virBufferVSprintf(buf, " %s\n", def->os.cmdline) < 0) goto no_memory; for (n = 0 ; n < def->os.nBootDevs ; n++) { const char *boottype = "hd"; switch (def->os.bootDevs[n]) { case QEMUD_BOOT_FLOPPY: boottype = "fd"; break; case QEMUD_BOOT_DISK: boottype = "hd"; break; case QEMUD_BOOT_CDROM: boottype = "cdrom"; break; case QEMUD_BOOT_NET: boottype = "net"; break; } if (virBufferVSprintf(buf, " \n", boottype) < 0) goto no_memory; } if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; if (def->features & QEMUD_FEATURE_ACPI) { if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; } virBufferVSprintf(buf, " \n", def->localtime ? "localtime" : "utc"); if (virBufferAdd(buf, " destroy\n", -1) < 0) goto no_memory; if (def->noReboot) { if (virBufferAdd(buf, " destroy\n", -1) < 0) goto no_memory; } else { if (virBufferAdd(buf, " restart\n", -1) < 0) goto no_memory; } if (virBufferAdd(buf, " destroy\n", -1) < 0) goto no_memory; if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; if (virBufferVSprintf(buf, " %s\n", def->os.binary) < 0) goto no_memory; disk = def->disks; while (disk) { const char *types[] = { "block", "file", }; const char *typeAttrs[] = { "dev", "file", }; const char *devices[] = { "disk", "cdrom", "floppy", }; if (virBufferVSprintf(buf, " \n", types[disk->type], devices[disk->device]) < 0) goto no_memory; if (virBufferVSprintf(buf, " \n", typeAttrs[disk->type], disk->src) < 0) goto no_memory; if (virBufferVSprintf(buf, " \n", disk->dst) < 0) goto no_memory; if (disk->readonly) if (virBufferAdd(buf, " \n", -1) < 0) goto no_memory; if (virBufferVSprintf(buf, " \n") < 0) goto no_memory; disk = disk->next; } net = def->nets; while (net) { const char *types[] = { "user", "ethernet", "server", "client", "mcast", "network", "bridge", }; if (virBufferVSprintf(buf, " \n", types[net->type]) < 0) goto no_memory; if (virBufferVSprintf(buf, " \n", net->mac[0], net->mac[1], net->mac[2], net->mac[3], net->mac[4], net->mac[5]) < 0) goto no_memory; switch (net->type) { case QEMUD_NET_NETWORK: if (virBufferVSprintf(buf, " \n", net->dst.network.name) < 0) goto no_memory; if (net->dst.network.ifname[0] != '\0') { if (virBufferVSprintf(buf, " \n", net->dst.network.ifname) < 0) goto no_memory; } break; case QEMUD_NET_ETHERNET: if (net->dst.ethernet.ifname[0] != '\0') { if (virBufferVSprintf(buf, " \n", net->dst.ethernet.ifname) < 0) goto no_memory; } if (net->dst.ethernet.script[0] != '\0') { if (virBufferVSprintf(buf, "