/* * driver.c: core driver methods for managing qemu guests * * Copyright (C) 2006, 2007, 2008, 2009 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 #include #include #include #if HAVE_SCHED_H #include #endif #include "virterror_internal.h" #include "logging.h" #include "datatypes.h" #include "qemu_driver.h" #include "qemu_conf.h" #include "c-ctype.h" #include "event.h" #include "buf.h" #include "util.h" #include "nodeinfo.h" #include "stats_linux.h" #include "capabilities.h" #include "memory.h" #include "uuid.h" #include "domain_conf.h" #include "node_device_conf.h" #include "pci.h" #include "security.h" #include "cgroup.h" #define VIR_FROM_THIS VIR_FROM_QEMU #define QEMU_CMD_PROMPT "\n(qemu) " #define QEMU_PASSWD_PROMPT "Password: " static int qemudShutdown(void); static void qemuDriverLock(struct qemud_driver *driver) { virMutexLock(&driver->lock); } static void qemuDriverUnlock(struct qemud_driver *driver) { virMutexUnlock(&driver->lock); } /* Return -1 for error, 0 for success */ typedef int qemudMonitorExtraPromptHandler(const virDomainObjPtr vm, const char *buf, const char *prompt, void *data); static void qemuDomainEventFlush(int timer, void *opaque); static void qemuDomainEventQueue(struct qemud_driver *driver, virDomainEventPtr event); static void qemudDispatchVMEvent(int watch, int fd, int events, void *opaque); static int qemudStartVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, const char *migrateFrom, int stdin_fd); static void qemudShutdownVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm); static int qemudDomainGetMaxVcpus(virDomainPtr dom); static int qemudMonitorCommand(const virDomainObjPtr vm, const char *cmd, char **reply); static int qemudMonitorCommandWithFd(const virDomainObjPtr vm, const char *cmd, int scm_fd, char **reply); static int qemudMonitorCommandWithHandler(const virDomainObjPtr vm, const char *cmd, const char *extraPrompt, qemudMonitorExtraPromptHandler extraHandler, void *handlerData, int scm_fd, char **reply); static int qemudMonitorCommandExtra(const virDomainObjPtr vm, const char *cmd, const char *extra, const char *extraPrompt, int scm_fd, char **reply); static int qemudDomainSetMemoryBalloon(virConnectPtr conn, virDomainObjPtr vm, unsigned long newmem); static int qemudDetectVcpuPIDs(virConnectPtr conn, virDomainObjPtr vm); static int qemuUpdateActivePciHostdevs(struct qemud_driver *driver, virDomainDefPtr def); static struct qemud_driver *qemu_driver = NULL; static int qemuCgroupControllerActive(struct qemud_driver *driver, int controller) { if (driver->cgroup == NULL) return 0; if (driver->cgroupControllers & (1 << controller)) return 1; return 0; } static int qemudLogFD(virConnectPtr conn, struct qemud_driver *driver, const char* name) { char logfile[PATH_MAX]; mode_t logmode; int ret, fd = -1; if ((ret = snprintf(logfile, sizeof(logfile), "%s/%s.log", driver->logDir, name)) < 0 || ret >= sizeof(logfile)) { virReportOOMError(conn); return -1; } logmode = O_CREAT | O_WRONLY; /* Only logrotate files in /var/log, so only append if running privileged */ if (driver->privileged) logmode |= O_APPEND; else logmode |= O_TRUNC; if ((fd = open(logfile, logmode, S_IRUSR | S_IWUSR)) < 0) { virReportSystemError(conn, errno, _("failed to create logfile %s"), logfile); return -1; } if (virSetCloseExec(fd) < 0) { virReportSystemError(conn, errno, "%s", _("Unable to set VM logfile close-on-exec flag")); close(fd); return -1; } return fd; } static int qemudLogReadFD(virConnectPtr conn, const char* logDir, const char* name, off_t pos) { char logfile[PATH_MAX]; mode_t logmode = O_RDONLY; int ret, fd = -1; if ((ret = snprintf(logfile, sizeof(logfile), "%s/%s.log", logDir, name)) < 0 || ret >= sizeof(logfile)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("failed to build logfile name %s/%s.log"), logDir, name); return -1; } if ((fd = open(logfile, logmode)) < 0) { virReportSystemError(conn, errno, _("failed to create logfile %s"), logfile); return -1; } if (virSetCloseExec(fd) < 0) { virReportSystemError(conn, errno, "%s", _("Unable to set VM logfile close-on-exec flag")); close(fd); return -1; } if (lseek(fd, pos, SEEK_SET) < 0) { virReportSystemError(conn, errno, _("Unable to seek to %lld in %s"), (long long) pos, logfile); close(fd); } return fd; } static void qemudAutostartConfigs(struct qemud_driver *driver) { unsigned int i; /* XXX: Figure out a better way todo this. The domain * startup code needs a connection handle in order * to lookup the bridge associated with a virtual * network */ virConnectPtr conn = virConnectOpen(driver->privileged ? "qemu:///system" : "qemu:///session"); /* Ignoring NULL conn which is mostly harmless here */ qemuDriverLock(driver); for (i = 0 ; i < driver->domains.count ; i++) { virDomainObjPtr vm = driver->domains.objs[i]; virDomainObjLock(vm); if (vm->autostart && !virDomainIsActive(vm)) { int ret = qemudStartVMDaemon(conn, driver, vm, NULL, -1); if (ret < 0) { virErrorPtr err = virGetLastError(); VIR_ERROR(_("Failed to autostart VM '%s': %s\n"), vm->def->name, err ? err->message : ""); } else { virDomainEventPtr event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_BOOTED); if (event) qemuDomainEventQueue(driver, event); } } virDomainObjUnlock(vm); } qemuDriverUnlock(driver); if (conn) virConnectClose(conn); } /** * qemudRemoveDomainStatus * * remove all state files of a domain from statedir * * Returns 0 on success */ static int qemudRemoveDomainStatus(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { int rc = -1; char *file = NULL; if (virAsprintf(&file, "%s/%s.xml", driver->stateDir, vm->def->name) < 0) { virReportOOMError(conn); goto cleanup; } if (unlink(file) < 0 && errno != ENOENT && errno != ENOTDIR) { qemudReportError(conn, vm, NULL, VIR_ERR_INTERNAL_ERROR, _("Failed to unlink status file %s"), file); goto cleanup; } if(virFileDeletePid(driver->stateDir, vm->def->name)) goto cleanup; rc = 0; cleanup: VIR_FREE(file); return rc; } static int qemudOpenMonitor(virConnectPtr conn, struct qemud_driver* driver, virDomainObjPtr vm, int reconnect); /* * Open an existing VM's monitor, re-detect VCPU threads * and re-reserve the security labels in use */ static int qemuReconnectDomain(struct qemud_driver *driver, virDomainObjPtr obj) { int rc; if ((rc = qemudOpenMonitor(NULL, driver, obj, 1)) != 0) { VIR_ERROR(_("Failed to reconnect monitor for %s: %d\n"), obj->def->name, rc); goto error; } if (qemudDetectVcpuPIDs(NULL, obj) < 0) { goto error; } if (qemuUpdateActivePciHostdevs(driver, obj->def) < 0) { goto error; } if (obj->def->seclabel.type == VIR_DOMAIN_SECLABEL_DYNAMIC && driver->securityDriver && driver->securityDriver->domainReserveSecurityLabel && driver->securityDriver->domainReserveSecurityLabel(NULL, obj) < 0) return -1; if (obj->def->id >= driver->nextvmid) driver->nextvmid = obj->def->id + 1; return 0; error: return -1; } /** * qemudReconnectVMs * * Try to re-open the resources for live VMs that we care * about. */ static void qemuReconnectDomains(struct qemud_driver *driver) { int i; for (i = 0 ; i < driver->domains.count ; i++) { virDomainObjPtr obj = driver->domains.objs[i]; virDomainObjLock(obj); if (qemuReconnectDomain(driver, obj) < 0) { /* If we can't get the monitor back, then kill the VM * so user has ability to start it again later without * danger of ending up running twice */ qemudShutdownVMDaemon(NULL, driver, obj); } virDomainObjUnlock(obj); } } static int qemudSecurityCapsInit(virSecurityDriverPtr secdrv, virCapsPtr caps) { const char *doi, *model; doi = virSecurityDriverGetDOI(secdrv); model = virSecurityDriverGetModel(secdrv); caps->host.secModel.model = strdup(model); if (!caps->host.secModel.model) { char ebuf[1024]; VIR_ERROR(_("Failed to copy secModel model: %s"), virStrerror(errno, ebuf, sizeof ebuf)); return -1; } caps->host.secModel.doi = strdup(doi); if (!caps->host.secModel.doi) { char ebuf[1024]; VIR_ERROR(_("Failed to copy secModel DOI: %s"), virStrerror(errno, ebuf, sizeof ebuf)); return -1; } VIR_DEBUG("Initialized caps for security driver \"%s\" with " "DOI \"%s\"", model, doi); return 0; } static int qemudSecurityInit(struct qemud_driver *qemud_drv) { int ret; virSecurityDriverPtr security_drv; ret = virSecurityDriverStartup(&security_drv, qemud_drv->securityDriverName); if (ret == -1) { VIR_ERROR0(_("Failed to start security driver")); return -1; } /* No security driver wanted to be enabled: just return */ if (ret == -2) { VIR_INFO0(_("No security driver available")); return 0; } qemud_drv->securityDriver = security_drv; VIR_INFO("Initialized security driver %s", security_drv->name); /* * Add security policy host caps now that the security driver is * initialized. */ return qemudSecurityCapsInit(security_drv, qemud_drv->caps); } /** * qemudStartup: * * Initialization function for the QEmu daemon */ static int qemudStartup(int privileged) { char *base = NULL; char driverConf[PATH_MAX]; int rc; if (VIR_ALLOC(qemu_driver) < 0) return -1; if (virMutexInit(&qemu_driver->lock) < 0) { VIR_ERROR("%s", _("cannot initialize mutex")); VIR_FREE(qemu_driver); return -1; } qemuDriverLock(qemu_driver); qemu_driver->privileged = privileged; /* Don't have a dom0 so start from 1 */ qemu_driver->nextvmid = 1; /* Init callback list */ if(VIR_ALLOC(qemu_driver->domainEventCallbacks) < 0) goto out_of_memory; if (!(qemu_driver->domainEventQueue = virDomainEventQueueNew())) goto out_of_memory; if ((qemu_driver->domainEventTimer = virEventAddTimeout(-1, qemuDomainEventFlush, qemu_driver, NULL)) < 0) goto error; if (privileged) { if (virAsprintf(&qemu_driver->logDir, "%s/log/libvirt/qemu", LOCAL_STATE_DIR) == -1) goto out_of_memory; if ((base = strdup (SYSCONF_DIR "/libvirt")) == NULL) goto out_of_memory; if (virAsprintf(&qemu_driver->stateDir, "%s/run/libvirt/qemu", LOCAL_STATE_DIR) == -1) goto out_of_memory; if (virAsprintf(&qemu_driver->libDir, "%s/lib/libvirt/qemu", LOCAL_STATE_DIR) == -1) goto out_of_memory; if (virAsprintf(&qemu_driver->cacheDir, "%s/cache/libvirt/qemu", LOCAL_STATE_DIR) == -1) goto out_of_memory; } else { uid_t uid = geteuid(); char *userdir = virGetUserDirectory(NULL, uid); if (!userdir) goto error; if (virAsprintf(&qemu_driver->logDir, "%s/.libvirt/qemu/log", userdir) == -1) { VIR_FREE(userdir); goto out_of_memory; } if (virAsprintf(&base, "%s/.libvirt", userdir) == -1) { VIR_FREE(userdir); goto out_of_memory; } VIR_FREE(userdir); if (virAsprintf(&qemu_driver->stateDir, "%s/qemu/run", base) == -1) goto out_of_memory; if (virAsprintf(&qemu_driver->libDir, "%s/qemu/lib", base) == -1) goto out_of_memory; if (virAsprintf(&qemu_driver->cacheDir, "%s/qemu/cache", base) == -1) goto out_of_memory; } if (virFileMakePath(qemu_driver->stateDir) < 0) { char ebuf[1024]; VIR_ERROR(_("Failed to create state dir '%s': %s\n"), qemu_driver->stateDir, virStrerror(errno, ebuf, sizeof ebuf)); goto error; } if (virFileMakePath(qemu_driver->libDir) < 0) { char ebuf[1024]; VIR_ERROR(_("Failed to create lib dir '%s': %s\n"), qemu_driver->libDir, virStrerror(errno, ebuf, sizeof ebuf)); goto error; } if (virFileMakePath(qemu_driver->cacheDir) < 0) { char ebuf[1024]; VIR_ERROR(_("Failed to create cache dir '%s': %s\n"), qemu_driver->cacheDir, virStrerror(errno, ebuf, sizeof ebuf)); goto error; } /* Configuration paths are either ~/.libvirt/qemu/... (session) or * /etc/libvirt/qemu/... (system). */ if (snprintf (driverConf, sizeof(driverConf), "%s/qemu.conf", base) == -1) goto out_of_memory; driverConf[sizeof(driverConf)-1] = '\0'; if (virAsprintf(&qemu_driver->configDir, "%s/qemu", base) == -1) goto out_of_memory; if (virAsprintf(&qemu_driver->autostartDir, "%s/qemu/autostart", base) == -1) goto out_of_memory; VIR_FREE(base); rc = virCgroupForDriver("qemu", &qemu_driver->cgroup, privileged, 1); if (rc < 0) { char buf[1024]; VIR_WARN("Unable to create cgroup for driver: %s", virStrerror(-rc, buf, sizeof(buf))); } if ((qemu_driver->caps = qemudCapsInit(NULL)) == NULL) goto out_of_memory; if ((qemu_driver->activePciHostdevs = pciDeviceListNew(NULL)) == NULL) goto error; if (qemudLoadDriverConfig(qemu_driver, driverConf) < 0) { goto error; } if (privileged) { if (chown(qemu_driver->libDir, qemu_driver->user, qemu_driver->group) < 0) { virReportSystemError(NULL, errno, _("unable to set ownership of '%s' to user %d:%d"), qemu_driver->libDir, qemu_driver->user, qemu_driver->group); goto error; } if (chown(qemu_driver->cacheDir, qemu_driver->user, qemu_driver->group) < 0) { virReportSystemError(NULL, errno, _("unable to set ownership of '%s' to %d:%d"), qemu_driver->cacheDir, qemu_driver->user, qemu_driver->group); goto error; } } if (qemudSecurityInit(qemu_driver) < 0) { goto error; } /* If hugetlbfs is present, then we need to create a sub-directory within * it, since we can't assume the root mount point has permissions that * will let our spawned QEMU instances use it. * * NB the check for '/', since user may config "" to disable hugepages * even when mounted */ if (qemu_driver->hugetlbfs_mount && qemu_driver->hugetlbfs_mount[0] == '/') { char *mempath = NULL; if (virAsprintf(&mempath, "%s/libvirt/qemu", qemu_driver->hugetlbfs_mount) < 0) goto out_of_memory; if ((rc = virFileMakePath(mempath)) != 0) { virReportSystemError(NULL, rc, _("unable to create hugepage path %s"), mempath); VIR_FREE(mempath); goto error; } if (qemu_driver->privileged && chown(mempath, qemu_driver->user, qemu_driver->group) < 0) { virReportSystemError(NULL, errno, _("unable to set ownership on %s to %d:%d"), mempath, qemu_driver->user, qemu_driver->group); VIR_FREE(mempath); goto error; } qemu_driver->hugepage_path = mempath; } /* Get all the running persistent or transient configs first */ if (virDomainLoadAllConfigs(NULL, qemu_driver->caps, &qemu_driver->domains, qemu_driver->stateDir, NULL, 1, NULL, NULL) < 0) goto error; qemuReconnectDomains(qemu_driver); /* Then inactive persistent configs */ if (virDomainLoadAllConfigs(NULL, qemu_driver->caps, &qemu_driver->domains, qemu_driver->configDir, qemu_driver->autostartDir, 0, NULL, NULL) < 0) goto error; qemuDriverUnlock(qemu_driver); qemudAutostartConfigs(qemu_driver); return 0; out_of_memory: virReportOOMError(NULL); error: if (qemu_driver) qemuDriverUnlock(qemu_driver); VIR_FREE(base); qemudShutdown(); return -1; } static void qemudNotifyLoadDomain(virDomainObjPtr vm, int newVM, void *opaque) { struct qemud_driver *driver = opaque; if (newVM) { virDomainEventPtr event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_DEFINED, VIR_DOMAIN_EVENT_DEFINED_ADDED); if (event) qemuDomainEventQueue(driver, event); } } /** * qemudReload: * * Function to restart the QEmu daemon, it will recheck the configuration * files and update its state and the networking */ static int qemudReload(void) { if (!qemu_driver) return 0; qemuDriverLock(qemu_driver); virDomainLoadAllConfigs(NULL, qemu_driver->caps, &qemu_driver->domains, qemu_driver->configDir, qemu_driver->autostartDir, 0, qemudNotifyLoadDomain, qemu_driver); qemuDriverUnlock(qemu_driver); qemudAutostartConfigs(qemu_driver); return 0; } /** * qemudActive: * * Checks if the QEmu daemon is active, i.e. has an active domain or * an active network * * Returns 1 if active, 0 otherwise */ static int qemudActive(void) { unsigned int i; int active = 0; if (!qemu_driver) return 0; qemuDriverLock(qemu_driver); for (i = 0 ; i < qemu_driver->domains.count ; i++) { virDomainObjPtr vm = qemu_driver->domains.objs[i]; virDomainObjLock(vm); if (virDomainIsActive(vm)) active = 1; virDomainObjUnlock(vm); } qemuDriverUnlock(qemu_driver); return active; } /** * qemudShutdown: * * Shutdown the QEmu daemon, it will stop all active domains and networks */ static int qemudShutdown(void) { if (!qemu_driver) return -1; qemuDriverLock(qemu_driver); pciDeviceListFree(NULL, qemu_driver->activePciHostdevs); virCapabilitiesFree(qemu_driver->caps); virDomainObjListFree(&qemu_driver->domains); VIR_FREE(qemu_driver->securityDriverName); VIR_FREE(qemu_driver->logDir); VIR_FREE(qemu_driver->configDir); VIR_FREE(qemu_driver->autostartDir); VIR_FREE(qemu_driver->stateDir); VIR_FREE(qemu_driver->libDir); VIR_FREE(qemu_driver->cacheDir); VIR_FREE(qemu_driver->vncTLSx509certdir); VIR_FREE(qemu_driver->vncListen); VIR_FREE(qemu_driver->vncPassword); VIR_FREE(qemu_driver->vncSASLdir); VIR_FREE(qemu_driver->saveImageFormat); VIR_FREE(qemu_driver->hugetlbfs_mount); VIR_FREE(qemu_driver->hugepage_path); /* Free domain callback list */ virDomainEventCallbackListFree(qemu_driver->domainEventCallbacks); virDomainEventQueueFree(qemu_driver->domainEventQueue); if (qemu_driver->domainEventTimer != -1) virEventRemoveTimeout(qemu_driver->domainEventTimer); if (qemu_driver->brctl) brShutdown(qemu_driver->brctl); virCgroupFree(&qemu_driver->cgroup); qemuDriverUnlock(qemu_driver); virMutexDestroy(&qemu_driver->lock); VIR_FREE(qemu_driver); return 0; } /* Return -1 for error, 1 to continue reading and 0 for success */ typedef int qemudHandlerMonitorOutput(virConnectPtr conn, virDomainObjPtr vm, const char *output, int fd); /* * Returns -1 for error, 0 on end-of-file, 1 for success */ static int qemudReadMonitorOutput(virConnectPtr conn, virDomainObjPtr vm, int fd, char *buf, size_t buflen, qemudHandlerMonitorOutput func, const char *what, int timeout) { size_t got = 0; buf[0] = '\0'; timeout *= 1000; /* poll wants milli seconds */ /* Consume & discard the initial greeting */ while (got < (buflen-1)) { ssize_t ret; ret = read(fd, buf+got, buflen-got-1); if (ret < 0) { struct pollfd pfd = { .fd = fd, .events = POLLIN }; if (errno == EINTR) continue; if (errno != EAGAIN) { virReportSystemError(conn, errno, _("Failure while reading %s startup output"), what); return -1; } ret = poll(&pfd, 1, timeout); if (ret == 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Timed out while reading %s startup output"), what); return -1; } else if (ret == -1) { if (errno != EINTR) { virReportSystemError(conn, errno, _("Failure while reading %s startup output"), what); return -1; } } else { /* Make sure we continue loop & read any further data available before dealing with EOF */ if (pfd.revents & (POLLIN | POLLHUP)) continue; qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Failure while reading %s startup output"), what); return -1; } } else if (ret == 0) { return 0; } else { got += ret; buf[got] = '\0'; ret = func(conn, vm, buf, fd); if (ret == -1) return -1; if (ret == 1) continue; return 1; } } qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Out of space while reading %s startup output"), what); return -1; } /* * Returns -1 for error, 0 on success */ static int qemudReadLogOutput(virConnectPtr conn, virDomainObjPtr vm, int fd, char *buf, size_t buflen, qemudHandlerMonitorOutput func, const char *what, int timeout) { int retries = (timeout*10); int got = 0; buf[0] = '\0'; while (retries) { ssize_t func_ret, ret; int isdead = 0; func_ret = func(conn, vm, buf, fd); if (kill(vm->pid, 0) == -1 && errno == ESRCH) isdead = 1; /* Any failures should be detected before we read the log, so we * always have something useful to report on failure. */ ret = saferead(fd, buf+got, buflen-got-1); if (ret < 0) { virReportSystemError(conn, errno, _("Failure while reading %s log output"), what); return -1; } got += ret; buf[got] = '\0'; if (got == buflen-1) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Out of space while reading %s log output"), what); return -1; } if (isdead) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Process exited while reading %s log output"), what); return -1; } if (func_ret <= 0) return func_ret; usleep(100*1000); retries--; } if (retries == 0) qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Timed out while reading %s log output"), what); return -1; } static int qemudCheckMonitorPrompt(virConnectPtr conn ATTRIBUTE_UNUSED, virDomainObjPtr vm, const char *output, int fd) { if (strstr(output, "(qemu) ") == NULL) return 1; /* keep reading */ vm->monitor = fd; return 0; } static int qemudOpenMonitorCommon(virConnectPtr conn, struct qemud_driver* driver, virDomainObjPtr vm, int monfd, int reconnect) { char buf[1024]; int ret; if (virSetCloseExec(monfd) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Unable to set monitor close-on-exec flag")); return -1; } if (virSetNonBlock(monfd) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Unable to put monitor into non-blocking mode")); return -1; } if (!reconnect) { if (qemudReadMonitorOutput(conn, vm, monfd, buf, sizeof(buf), qemudCheckMonitorPrompt, "monitor", 10) <= 0) ret = -1; else ret = 0; } else { vm->monitor = monfd; ret = 0; } if (ret != 0) return ret; if ((vm->monitorWatch = virEventAddHandle(vm->monitor, 0, qemudDispatchVMEvent, driver, NULL)) < 0) return -1; return 0; } static int qemudOpenMonitorUnix(virConnectPtr conn, struct qemud_driver* driver, virDomainObjPtr vm, const char *monitor, int reconnect) { struct sockaddr_un addr; int monfd; int timeout = 3; /* In seconds */ int ret, i = 0; if ((monfd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { virReportSystemError(conn, errno, "%s", _("failed to create socket")); return -1; } memset(&addr, 0, sizeof(addr)); addr.sun_family = AF_UNIX; strncpy(addr.sun_path, monitor, sizeof(addr.sun_path)); do { ret = connect(monfd, (struct sockaddr *) &addr, sizeof(addr)); if (ret == 0) break; if (errno == ENOENT || errno == ECONNREFUSED) { /* ENOENT : Socket may not have shown up yet * ECONNREFUSED : Leftover socket hasn't been removed yet */ continue; } virReportSystemError(conn, errno, "%s", _("failed to connect to monitor socket")); goto error; } while ((++i <= timeout*5) && (usleep(.2 * 1000000) <= 0)); if (ret != 0) { virReportSystemError(conn, errno, "%s", _("monitor socket did not show up.")); goto error; } if (qemudOpenMonitorCommon(conn, driver, vm, monfd, reconnect) < 0) goto error; return 0; error: close(monfd); return -1; } static int qemudOpenMonitorPty(virConnectPtr conn, struct qemud_driver* driver, virDomainObjPtr vm, const char *monitor, int reconnect) { int monfd; if ((monfd = open(monitor, O_RDWR)) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Unable to open monitor path %s"), monitor); return -1; } if (qemudOpenMonitorCommon(conn, driver, vm, monfd, reconnect) < 0) goto error; return 0; error: close(monfd); return -1; } static int qemudOpenMonitor(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, int reconnect) { switch (vm->monitor_chr->type) { case VIR_DOMAIN_CHR_TYPE_UNIX: return qemudOpenMonitorUnix(conn, driver, vm, vm->monitor_chr->data.nix.path, reconnect); case VIR_DOMAIN_CHR_TYPE_PTY: return qemudOpenMonitorPty(conn, driver, vm, vm->monitor_chr->data.file.path, reconnect); default: qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("unable to handle monitor type: %s"), virDomainChrTypeToString(vm->monitor_chr->type)); return -1; } } /* Returns -1 for error, 0 success, 1 continue reading */ static int qemudExtractMonitorPath(virConnectPtr conn, const char *haystack, size_t *offset, char **path) { static const char needle[] = "char device redirected to"; char *tmp, *dev; VIR_FREE(*path); /* First look for our magic string */ if (!(tmp = strstr(haystack + *offset, needle))) { return 1; } tmp += sizeof(needle); dev = tmp; /* * And look for first whitespace character and nul terminate * to mark end of the pty path */ while (*tmp) { if (c_isspace(*tmp)) { *path = strndup(dev, tmp-dev); if (*path == NULL) { virReportOOMError(conn); return -1; } /* ... now further update offset till we get EOL */ *offset = tmp - haystack; return 0; } tmp++; } /* * We found a path, but didn't find any whitespace, * so it must be still incomplete - we should at * least see a \n - indicate that we want to carry * on trying again */ return 1; } static int qemudFindCharDevicePTYs(virConnectPtr conn, virDomainObjPtr vm, const char *output, int fd ATTRIBUTE_UNUSED) { size_t offset = 0; int ret, i; /* The order in which QEMU prints out the PTY paths is the order in which it procsses its serial and parallel device args. This code must match that ordering.... */ /* first comes the serial devices */ for (i = 0 ; i < vm->def->nserials ; i++) { virDomainChrDefPtr chr = vm->def->serials[i]; if (chr->type == VIR_DOMAIN_CHR_TYPE_PTY) { if ((ret = qemudExtractMonitorPath(conn, output, &offset, &chr->data.file.path)) != 0) return ret; } } /* then the parallel devices */ for (i = 0 ; i < vm->def->nparallels ; i++) { virDomainChrDefPtr chr = vm->def->parallels[i]; if (chr->type == VIR_DOMAIN_CHR_TYPE_PTY) { if ((ret = qemudExtractMonitorPath(conn, output, &offset, &chr->data.file.path)) != 0) return ret; } } return 0; } static int qemudWaitForMonitor(virConnectPtr conn, struct qemud_driver* driver, virDomainObjPtr vm, off_t pos) { char buf[4096]; /* Plenty of space to get startup greeting */ int logfd; int ret; if ((logfd = qemudLogReadFD(conn, driver->logDir, vm->def->name, pos)) < 0) return -1; ret = qemudReadLogOutput(conn, vm, logfd, buf, sizeof(buf), qemudFindCharDevicePTYs, "console", 3); if (close(logfd) < 0) { char ebuf[4096]; VIR_WARN(_("Unable to close logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); } if (ret < 0) { /* Unexpected end of file - inform user of QEMU log data */ qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("unable to start guest: %s"), buf); return -1; } if (qemudOpenMonitor(conn, driver, vm, 0) < 0) return -1; return 0; } static int qemudDetectVcpuPIDs(virConnectPtr conn, virDomainObjPtr vm) { char *qemucpus = NULL; char *line; int lastVcpu = -1; /* Only KVM has seperate threads for CPUs, others just use main QEMU process for CPU */ if (vm->def->virtType != VIR_DOMAIN_VIRT_KVM) vm->nvcpupids = 1; else vm->nvcpupids = vm->def->vcpus; if (VIR_ALLOC_N(vm->vcpupids, vm->nvcpupids) < 0) { virReportOOMError(conn); return -1; } if (vm->def->virtType != VIR_DOMAIN_VIRT_KVM) { vm->vcpupids[0] = vm->pid; return 0; } if (qemudMonitorCommand(vm, "info cpus", &qemucpus) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot run monitor command to fetch CPU thread info")); VIR_FREE(vm->vcpupids); vm->nvcpupids = 0; return -1; } /* * This is the gross format we're about to parse :-{ * * (qemu) info cpus * * CPU #0: pc=0x00000000000f0c4a thread_id=30019 * CPU #1: pc=0x00000000fffffff0 thread_id=30020 * CPU #2: pc=0x00000000fffffff0 thread_id=30021 * */ line = qemucpus; do { char *offset = strchr(line, '#'); char *end = NULL; int vcpu = 0, tid = 0; /* See if we're all done */ if (offset == NULL) break; /* Extract VCPU number */ if (virStrToLong_i(offset + 1, &end, 10, &vcpu) < 0) goto error; if (end == NULL || *end != ':') goto error; /* Extract host Thread ID */ if ((offset = strstr(line, "thread_id=")) == NULL) goto error; if (virStrToLong_i(offset + strlen("thread_id="), &end, 10, &tid) < 0) goto error; if (end == NULL || !c_isspace(*end)) goto error; /* Validate the VCPU is in expected range & order */ if (vcpu > vm->nvcpupids || vcpu != (lastVcpu + 1)) goto error; lastVcpu = vcpu; vm->vcpupids[vcpu] = tid; /* Skip to next data line */ line = strchr(offset, '\r'); if (line == NULL) line = strchr(offset, '\n'); } while (line != NULL); /* Validate we got data for all VCPUs we expected */ if (lastVcpu != (vm->def->vcpus - 1)) goto error; VIR_FREE(qemucpus); return 0; error: VIR_FREE(vm->vcpupids); vm->nvcpupids = 0; VIR_FREE(qemucpus); /* Explicitly return success, not error. Older KVM does not have vCPU -> Thread mapping info and we don't want to break its use. This merely disables ability to pin vCPUS with libvirt */ return 0; } static int qemudInitCpus(virConnectPtr conn, virDomainObjPtr vm, const char *migrateFrom) { char *info = NULL; #if HAVE_SCHED_GETAFFINITY cpu_set_t mask; int i, maxcpu = QEMUD_CPUMASK_LEN; virNodeInfo nodeinfo; if (nodeGetInfo(conn, &nodeinfo) < 0) return -1; /* setaffinity fails if you set bits for CPUs which * aren't present, so we have to limit ourselves */ if (maxcpu > nodeinfo.cpus) maxcpu = nodeinfo.cpus; CPU_ZERO(&mask); if (vm->def->cpumask) { for (i = 0 ; i < maxcpu ; i++) if (vm->def->cpumask[i]) CPU_SET(i, &mask); } else { for (i = 0 ; i < maxcpu ; i++) CPU_SET(i, &mask); } for (i = 0 ; i < vm->nvcpupids ; i++) { if (sched_setaffinity(vm->vcpupids[i], sizeof(mask), &mask) < 0) { virReportSystemError(conn, errno, "%s", _("failed to set CPU affinity")); return -1; } } #endif /* HAVE_SCHED_GETAFFINITY */ if (migrateFrom == NULL) { /* Allow the CPUS to start executing */ if (qemudMonitorCommand(vm, "cont", &info) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("resume operation failed")); return -1; } VIR_FREE(info); } return 0; } static int qemudInitPasswords(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { char *info = NULL; /* * NB: Might have more passwords to set in the future. eg a qcow * disk decryption password, but there's no monitor command * for that yet... */ if ((vm->def->ngraphics == 1) && vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC && (vm->def->graphics[0]->data.vnc.passwd || driver->vncPassword)) { if (qemudMonitorCommandExtra(vm, "change vnc password", vm->def->graphics[0]->data.vnc.passwd ? vm->def->graphics[0]->data.vnc.passwd : driver->vncPassword, QEMU_PASSWD_PROMPT, -1, &info) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("setting VNC password failed")); return -1; } VIR_FREE(info); } return 0; } static int qemudNextFreeVNCPort(struct qemud_driver *driver ATTRIBUTE_UNUSED) { int i; for (i = 5900 ; i < 6000 ; i++) { int fd; int reuse = 1; struct sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_port = htons(i); addr.sin_addr.s_addr = htonl(INADDR_ANY); fd = socket(PF_INET, SOCK_STREAM, 0); if (fd < 0) return -1; if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*)&reuse, sizeof(reuse)) < 0) { close(fd); break; } if (bind(fd, (struct sockaddr*)&addr, sizeof(addr)) == 0) { /* Not in use, lets grab it */ close(fd); return i; } close(fd); if (errno == EADDRINUSE) { /* In use, try next */ continue; } /* Some other bad failure, get out.. */ break; } return -1; } static pciDeviceList * qemuGetPciHostDeviceList(virConnectPtr conn, virDomainDefPtr def) { pciDeviceList *list; int i; if (!(list = pciDeviceListNew(conn))) return NULL; for (i = 0 ; i < def->nhostdevs ; i++) { virDomainHostdevDefPtr hostdev = def->hostdevs[i]; pciDevice *dev; if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) continue; if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) continue; dev = pciGetDevice(conn, hostdev->source.subsys.u.pci.domain, hostdev->source.subsys.u.pci.bus, hostdev->source.subsys.u.pci.slot, hostdev->source.subsys.u.pci.function); if (!dev) { pciDeviceListFree(conn, list); return NULL; } if (pciDeviceListAdd(conn, list, dev) < 0) { pciFreeDevice(conn, dev); pciDeviceListFree(conn, list); return NULL; } pciDeviceSetManaged(dev, hostdev->managed); } return list; } static int qemuUpdateActivePciHostdevs(struct qemud_driver *driver, virDomainDefPtr def) { pciDeviceList *pcidevs; int i, ret; if (!def->nhostdevs) return 0; if (!(pcidevs = qemuGetPciHostDeviceList(NULL, def))) return -1; ret = 0; for (i = 0; i < pcidevs->count; i++) { if (pciDeviceListAdd(NULL, driver->activePciHostdevs, pcidevs->devs[i]) < 0) { ret = -1; break; } pcidevs->devs[i] = NULL; } pciDeviceListFree(NULL, pcidevs); return ret; } static int qemuPrepareHostDevices(virConnectPtr conn, struct qemud_driver *driver, virDomainDefPtr def) { pciDeviceList *pcidevs; int i; if (!def->nhostdevs) return 0; if (!(pcidevs = qemuGetPciHostDeviceList(conn, def))) return -1; /* We have to use 3 loops here. *All* devices must * be detached before we reset any of them, because * in some cases you have to reset the whole PCI, * which impacts all devices on it. Also, all devices * must be reset before being marked as active. */ /* XXX validate that non-managed device isn't in use, eg * by checking that device is either un-bound, or bound * to pci-stub.ko */ for (i = 0; i < pcidevs->count; i++) if (pciDeviceGetManaged(pcidevs->devs[i]) && pciDettachDevice(conn, pcidevs->devs[i]) < 0) goto error; /* Now that all the PCI hostdevs have be dettached, we can safely * reset them */ for (i = 0; i < pcidevs->count; i++) if (pciResetDevice(conn, pcidevs->devs[i], driver->activePciHostdevs) < 0) goto error; /* Now mark all the devices as active */ for (i = 0; i < pcidevs->count; i++) { if (pciDeviceListAdd(conn, driver->activePciHostdevs, pcidevs->devs[i]) < 0) goto error; pcidevs->devs[i] = NULL; } pciDeviceListFree(conn, pcidevs); return 0; error: pciDeviceListFree(conn, pcidevs); return -1; } static void qemuDomainReAttachHostDevices(virConnectPtr conn, struct qemud_driver *driver, virDomainDefPtr def) { pciDeviceList *pcidevs; int i; if (!def->nhostdevs) return; if (!(pcidevs = qemuGetPciHostDeviceList(conn, def))) { virErrorPtr err = virGetLastError(); VIR_ERROR(_("Failed to allocate pciDeviceList: %s\n"), err ? err->message : ""); virResetError(err); return; } /* Again 3 loops; mark all devices as inactive before reset * them and reset all the devices before re-attach */ for (i = 0; i < pcidevs->count; i++) pciDeviceListDel(conn, driver->activePciHostdevs, pcidevs->devs[i]); for (i = 0; i < pcidevs->count; i++) if (pciResetDevice(conn, pcidevs->devs[i], driver->activePciHostdevs) < 0) { virErrorPtr err = virGetLastError(); VIR_ERROR(_("Failed to reset PCI device: %s\n"), err ? err->message : ""); virResetError(err); } for (i = 0; i < pcidevs->count; i++) if (pciDeviceGetManaged(pcidevs->devs[i]) && pciReAttachDevice(conn, pcidevs->devs[i]) < 0) { virErrorPtr err = virGetLastError(); VIR_ERROR(_("Failed to re-attach PCI device: %s\n"), err ? err->message : ""); virResetError(err); } pciDeviceListFree(conn, pcidevs); } static const char *const defaultDeviceACL[] = { "/dev/null", "/dev/full", "/dev/zero", "/dev/random", "/dev/urandom", "/dev/ptmx", "/dev/kvm", "/dev/kqemu", "/dev/rtc", "/dev/hpet", "/dev/net/tun", NULL, }; #define DEVICE_PTY_MAJOR 136 #define DEVICE_SND_MAJOR 116 static int qemuSetupCgroup(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { virCgroupPtr cgroup = NULL; int rc; unsigned int i; const char *const *deviceACL = driver->cgroupDeviceACL ? (const char *const *)driver->cgroupDeviceACL : defaultDeviceACL; if (driver->cgroup == NULL) return 0; /* Not supported, so claim success */ rc = virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 1); if (rc != 0) { virReportSystemError(conn, -rc, _("Unable to create cgroup for %s"), vm->def->name); goto cleanup; } if (qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) { rc = virCgroupDenyAllDevices(cgroup); if (rc != 0) { if (rc == -EPERM) { VIR_WARN0("Group devices ACL is not accessible, disabling whitelisting"); goto done; } virReportSystemError(conn, -rc, _("Unable to deny all devices for %s"), vm->def->name); goto cleanup; } for (i = 0; i < vm->def->ndisks ; i++) { if (vm->def->disks[i]->type != VIR_DOMAIN_DISK_TYPE_BLOCK || vm->def->disks[i]->src == NULL) continue; rc = virCgroupAllowDevicePath(cgroup, vm->def->disks[i]->src); if (rc != 0) { virReportSystemError(conn, -rc, _("Unable to allow device %s for %s"), vm->def->disks[i]->src, vm->def->name); goto cleanup; } } rc = virCgroupAllowDeviceMajor(cgroup, 'c', DEVICE_PTY_MAJOR); if (rc != 0) { virReportSystemError(conn, -rc, "%s", _("unable to allow /dev/pts/ devices")); goto cleanup; } if (vm->def->nsounds) { rc = virCgroupAllowDeviceMajor(cgroup, 'c', DEVICE_SND_MAJOR); if (rc != 0) { virReportSystemError(conn, -rc, "%s", _("unable to allow /dev/snd/ devices")); goto cleanup; } } for (i = 0; deviceACL[i] != NULL ; i++) { rc = virCgroupAllowDevicePath(cgroup, deviceACL[i]); if (rc < 0 && rc != -ENOENT) { virReportSystemError(conn, -rc, _("unable to allow device %s"), deviceACL[i]); goto cleanup; } } } done: virCgroupFree(&cgroup); return 0; cleanup: if (cgroup) { virCgroupRemove(cgroup); virCgroupFree(&cgroup); } return -1; } static int qemuRemoveCgroup(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { virCgroupPtr cgroup; int rc; if (driver->cgroup == NULL) return 0; /* Not supported, so claim success */ rc = virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 0); if (rc != 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Unable to find cgroup for %s\n"), vm->def->name); return rc; } rc = virCgroupRemove(cgroup); virCgroupFree(&cgroup); return rc; } static int qemuAddToCgroup(struct qemud_driver *driver, virDomainDefPtr def) { virCgroupPtr cgroup = NULL; int ret = -1; int rc; if (driver->cgroup == NULL) return 0; /* Not supported, so claim success */ rc = virCgroupForDomain(driver->cgroup, def->name, &cgroup, 0); if (rc != 0) { virReportSystemError(NULL, -rc, _("unable to find cgroup for domain %s"), def->name); goto cleanup; } rc = virCgroupAddTask(cgroup, getpid()); if (rc != 0) { virReportSystemError(NULL, -rc, _("unable to add domain %s task %d to cgroup"), def->name, getpid()); goto cleanup; } ret = 0; cleanup: virCgroupFree(&cgroup); return ret; } static int qemudDomainSetSecurityLabel(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { if (vm->def->seclabel.label != NULL) if (driver->securityDriver && driver->securityDriver->domainSetSecurityLabel) return driver->securityDriver->domainSetSecurityLabel(conn, driver->securityDriver, vm); return 0; } #ifdef __linux__ static int qemuDomainSetHostdevUSBOwnership(virConnectPtr conn, virDomainHostdevDefPtr def, uid_t uid, gid_t gid) { char *usbpath = NULL; /* XXX what todo for USB devs assigned based on product/vendor ? Doom :-( */ if (!def->source.subsys.u.usb.bus || !def->source.subsys.u.usb.device) return 0; if (virAsprintf(&usbpath, "/dev/bus/usb/%03d/%03d", def->source.subsys.u.usb.bus, def->source.subsys.u.usb.device) < 0) { virReportOOMError(conn); return -1; } VIR_DEBUG("Setting ownership on %s to %d:%d", usbpath, uid, gid); if (chown(usbpath, uid, gid) < 0) { virReportSystemError(conn, errno, _("cannot set ownership on %s"), usbpath); VIR_FREE(usbpath); return -1; } VIR_FREE(usbpath); return 0; } static int qemuDomainSetHostdevPCIOwnership(virConnectPtr conn, virDomainHostdevDefPtr def, uid_t uid, gid_t gid) { char *pcidir = NULL; char *file = NULL; DIR *dir = NULL; int ret = -1; struct dirent *ent; if (virAsprintf(&pcidir, "/sys/bus/pci/devices/%04x:%02x:%02x.%x", def->source.subsys.u.pci.domain, def->source.subsys.u.pci.bus, def->source.subsys.u.pci.slot, def->source.subsys.u.pci.function) < 0) { virReportOOMError(conn); goto cleanup; } if (!(dir = opendir(pcidir))) { virReportSystemError(conn, errno, _("cannot open %s"), pcidir); goto cleanup; } while ((ent = readdir(dir)) != NULL) { /* QEMU device assignment requires: * $PCIDIR/config, $PCIDIR/resource, $PCIDIR/resourceNNN, $PCIDIR/rom */ if (STREQ(ent->d_name, "config") || STRPREFIX(ent->d_name, "resource") || STREQ(ent->d_name, "rom")) { if (virAsprintf(&file, "%s/%s", pcidir, ent->d_name) < 0) { virReportOOMError(conn); goto cleanup; } VIR_DEBUG("Setting ownership on %s to %d:%d", file, uid, gid); if (chown(file, uid, gid) < 0) { virReportSystemError(conn, errno, _("cannot set ownership on %s"), file); goto cleanup; } VIR_FREE(file); } } ret = 0; cleanup: if (dir) closedir(dir); VIR_FREE(file); VIR_FREE(pcidir); return ret; } #endif static int qemuDomainSetHostdevOwnership(virConnectPtr conn, virDomainHostdevDefPtr def, uid_t uid, gid_t gid) { if (def->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) return 0; #ifdef __linux__ switch (def->source.subsys.type) { case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: return qemuDomainSetHostdevUSBOwnership(conn, def, uid, gid); case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI: return qemuDomainSetHostdevPCIOwnership(conn, def, uid, gid); } return 0; #else qemudReportError(conn, NULL, NULL, "%s", _("unable to set host device ownership on this platform")); return -1; #endif } static int qemuDomainSetFileOwnership(virConnectPtr conn, const char *path, uid_t uid, gid_t gid) { if (!path) return 0; VIR_DEBUG("Setting ownership on %s to %d:%d", path, uid, gid); if (chown(path, uid, gid) < 0) { virReportSystemError(conn, errno, _("cannot set ownership on %s"), path); return -1; } return 0; } static int qemuDomainSetDeviceOwnership(virConnectPtr conn, struct qemud_driver *driver, virDomainDeviceDefPtr def, int restore) { uid_t uid; gid_t gid; if (!driver->privileged) return 0; /* short circuit case of root:root */ if (!driver->user && !driver->group) return 0; uid = restore ? 0 : driver->user; gid = restore ? 0 : driver->group; switch (def->type) { case VIR_DOMAIN_DEVICE_DISK: if (restore && (def->data.disk->readonly || def->data.disk->shared)) return 0; return qemuDomainSetFileOwnership(conn, def->data.disk->src, uid, gid); case VIR_DOMAIN_DEVICE_HOSTDEV: return qemuDomainSetHostdevOwnership(conn, def->data.hostdev, uid, gid); } return 0; } static int qemuDomainSetAllDeviceOwnership(virConnectPtr conn, struct qemud_driver *driver, virDomainDefPtr def, int restore) { int i; uid_t uid; gid_t gid; if (!driver->privileged) return 0; /* short circuit case of root:root */ if (!driver->user && !driver->group) return 0; uid = restore ? 0 : driver->user; gid = restore ? 0 : driver->group; if (qemuDomainSetFileOwnership(conn, def->os.kernel, uid, gid) < 0 || qemuDomainSetFileOwnership(conn, def->os.initrd, uid, gid) < 0) return -1; for (i = 0 ; i < def->ndisks ; i++) { if (restore && (def->disks[i]->readonly || def->disks[i]->shared)) continue; if (qemuDomainSetFileOwnership(conn, def->disks[i]->src, uid, gid) < 0) return -1; } for (i = 0 ; i < def->nhostdevs ; i++) { if (qemuDomainSetHostdevOwnership(conn, def->hostdevs[i], uid, gid) < 0) return -1; } return 0; } static virDomainPtr qemudDomainLookupByName(virConnectPtr conn, const char *name); struct qemudHookData { virConnectPtr conn; virDomainObjPtr vm; struct qemud_driver *driver; }; static int qemudSecurityHook(void *data) { struct qemudHookData *h = data; if (qemuAddToCgroup(h->driver, h->vm->def) < 0) return -1; if (qemudDomainSetSecurityLabel(h->conn, h->driver, h->vm) < 0) { qemudReportError(h->conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Failed to set security label")); return -1; } if (h->driver->privileged) { DEBUG("Dropping privileges of VM to %d:%d", h->driver->user, h->driver->group); if (qemuDomainSetAllDeviceOwnership(h->conn, h->driver, h->vm->def, 0) < 0) return -1; if (h->driver->group) { if (setregid(h->driver->group, h->driver->group) < 0) { virReportSystemError(NULL, errno, _("cannot change to '%d' group"), h->driver->group); return -1; } } if (h->driver->user) { if (setreuid(h->driver->user, h->driver->user) < 0) { virReportSystemError(NULL, errno, _("cannot change to '%d' user"), h->driver->user); return -1; } } } return 0; } static int qemuPrepareMonitorChr(virConnectPtr conn, struct qemud_driver *driver, virDomainChrDefPtr monitor_chr, const char *vm) { monitor_chr->type = VIR_DOMAIN_CHR_TYPE_UNIX; monitor_chr->data.nix.listen = 1; if (virAsprintf(&monitor_chr->data.nix.path, "%s/%s.monitor", driver->libDir, vm) < 0) { virReportOOMError(conn); return -1; } return 0; } static int qemudStartVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, const char *migrateFrom, int stdin_fd) { const char **argv = NULL, **tmp; const char **progenv = NULL; int i, ret; struct stat sb; int *tapfds = NULL; int ntapfds = 0; unsigned int qemuCmdFlags; fd_set keepfd; const char *emulator; pid_t child; int pos = -1; char ebuf[1024]; char *pidfile = NULL; int logfile; struct qemudHookData hookData; hookData.conn = conn; hookData.vm = vm; hookData.driver = driver; FD_ZERO(&keepfd); if (virDomainIsActive(vm)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("VM is already active")); return -1; } /* If you are using a SecurityDriver with dynamic labelling, then generate a security label for isolation */ if (vm->def->seclabel.type == VIR_DOMAIN_SECLABEL_DYNAMIC && driver->securityDriver && driver->securityDriver->domainGenSecurityLabel && driver->securityDriver->domainGenSecurityLabel(conn, vm) < 0) return -1; /* Ensure no historical cgroup for this VM is lieing around bogus settings */ qemuRemoveCgroup(conn, driver, vm); if ((vm->def->ngraphics == 1) && vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC && vm->def->graphics[0]->data.vnc.autoport) { int port = qemudNextFreeVNCPort(driver); if (port < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Unable to find an unused VNC port")); goto cleanup; } vm->def->graphics[0]->data.vnc.port = port; } if (virFileMakePath(driver->logDir) < 0) { virReportSystemError(conn, errno, _("cannot create log directory %s"), driver->logDir); goto cleanup; } if ((logfile = qemudLogFD(conn, driver, vm->def->name)) < 0) goto cleanup; emulator = vm->def->emulator; /* 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(emulator, &sb) < 0) { virReportSystemError(conn, errno, _("Cannot find QEMU binary %s"), emulator); goto cleanup; } if (qemudExtractVersionInfo(emulator, NULL, &qemuCmdFlags) < 0) goto cleanup; if (qemuSetupCgroup(conn, driver, vm) < 0) goto cleanup; if (qemuPrepareHostDevices(conn, driver, vm->def) < 0) goto cleanup; if (VIR_ALLOC(vm->monitor_chr) < 0) { virReportOOMError(conn); goto cleanup; } if (qemuPrepareMonitorChr(conn, driver, vm->monitor_chr, vm->def->name) < 0) goto cleanup; if ((ret = virFileDeletePid(driver->stateDir, vm->def->name)) != 0) { virReportSystemError(conn, ret, _("Cannot remove stale PID file for %s"), vm->def->name); goto cleanup; } if (!(pidfile = virFilePid(driver->stateDir, vm->def->name))) { virReportSystemError(conn, errno, "%s", _("Failed to build pidfile path.")); goto cleanup; } vm->def->id = driver->nextvmid++; if (qemudBuildCommandLine(conn, driver, vm->def, vm->monitor_chr, qemuCmdFlags, &argv, &progenv, &tapfds, &ntapfds, migrateFrom) < 0) goto cleanup; tmp = progenv; while (*tmp) { if (safewrite(logfile, *tmp, strlen(*tmp)) < 0) VIR_WARN(_("Unable to write envv to logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); if (safewrite(logfile, " ", 1) < 0) VIR_WARN(_("Unable to write envv to logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); tmp++; } tmp = argv; while (*tmp) { if (safewrite(logfile, *tmp, strlen(*tmp)) < 0) VIR_WARN(_("Unable to write argv to logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); if (safewrite(logfile, " ", 1) < 0) VIR_WARN(_("Unable to write argv to logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); tmp++; } if (safewrite(logfile, "\n", 1) < 0) VIR_WARN(_("Unable to write argv to logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); if ((pos = lseek(logfile, 0, SEEK_END)) < 0) VIR_WARN(_("Unable to seek to end of logfile: %s\n"), virStrerror(errno, ebuf, sizeof ebuf)); for (i = 0 ; i < ntapfds ; i++) FD_SET(tapfds[i], &keepfd); ret = virExecDaemonize(conn, argv, progenv, &keepfd, &child, stdin_fd, &logfile, &logfile, VIR_EXEC_NONBLOCK | VIR_EXEC_CLEAR_CAPS, qemudSecurityHook, &hookData, pidfile); VIR_FREE(pidfile); /* wait for qemu process to to show up */ if (ret == 0) { if (virFileReadPid(driver->stateDir, vm->def->name, &vm->pid)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Domain %s didn't show up\n"), vm->def->name); ret = -1; } } else if (ret == -2) { /* The virExec process that launches the daemon failed. Pending on * when it failed (we can't determine for sure), there may be * extra info in the domain log (if the hook failed for example). * * Pretend like things succeeded, and let 'WaitForMonitor' report * the log contents for us. */ vm->pid = child; ret = 0; } vm->state = migrateFrom ? VIR_DOMAIN_PAUSED : VIR_DOMAIN_RUNNING; for (i = 0 ; argv[i] ; i++) VIR_FREE(argv[i]); VIR_FREE(argv); for (i = 0 ; progenv[i] ; i++) VIR_FREE(progenv[i]); VIR_FREE(progenv); if (tapfds) { for (i = 0 ; i < ntapfds ; i++) { close(tapfds[i]); } VIR_FREE(tapfds); } if (ret == -1) goto cleanup; if ((qemudWaitForMonitor(conn, driver, vm, pos) < 0) || (qemudDetectVcpuPIDs(conn, vm) < 0) || (qemudInitCpus(conn, vm, migrateFrom) < 0) || (qemudInitPasswords(conn, driver, vm) < 0) || (qemudDomainSetMemoryBalloon(conn, vm, vm->def->memory) < 0) || (virDomainSaveStatus(conn, driver->stateDir, vm) < 0)) { qemudShutdownVMDaemon(conn, driver, vm); ret = -1; /* No need for 'goto cleanup' now since qemudShutdownVMDaemon does enough */ } return ret; cleanup: if (vm->def->seclabel.type == VIR_DOMAIN_SECLABEL_DYNAMIC) { VIR_FREE(vm->def->seclabel.model); VIR_FREE(vm->def->seclabel.label); VIR_FREE(vm->def->seclabel.imagelabel); } qemuRemoveCgroup(conn, driver, vm); if ((vm->def->ngraphics == 1) && vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC && vm->def->graphics[0]->data.vnc.autoport) vm->def->graphics[0]->data.vnc.port = -1; if (logfile != -1) close(logfile); vm->def->id = -1; return -1; } static void qemudShutdownVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { int ret; int retries = 0; if (!virDomainIsActive(vm)) return; VIR_DEBUG(_("Shutting down VM '%s'\n"), vm->def->name); if (virKillProcess(vm->pid, 0) == 0 && virKillProcess(vm->pid, SIGTERM) < 0) virReportSystemError(conn, errno, _("Failed to send SIGTERM to %s (%d)"), vm->def->name, vm->pid); if (vm->monitorWatch != -1) { virEventRemoveHandle(vm->monitorWatch); vm->monitorWatch = -1; } if (vm->monitor != -1) close(vm->monitor); vm->monitor = -1; if (vm->monitor_chr) { if (vm->monitor_chr->type == VIR_DOMAIN_CHR_TYPE_UNIX) unlink(vm->monitor_chr->data.nix.path); virDomainChrDefFree(vm->monitor_chr); vm->monitor_chr = NULL; } /* shut it off for sure */ virKillProcess(vm->pid, SIGKILL); /* Reset Security Labels */ if (driver->securityDriver) driver->securityDriver->domainRestoreSecurityLabel(conn, vm); /* Clear out dynamically assigned labels */ if (vm->def->seclabel.type == VIR_DOMAIN_SECLABEL_DYNAMIC) { VIR_FREE(vm->def->seclabel.model); VIR_FREE(vm->def->seclabel.label); VIR_FREE(vm->def->seclabel.imagelabel); } if (qemuDomainSetAllDeviceOwnership(conn, driver, vm->def, 1) < 0) VIR_WARN("Failed to restore all device ownership for %s", vm->def->name); qemuDomainReAttachHostDevices(conn, driver, vm->def); retry: if ((ret = qemuRemoveCgroup(conn, driver, vm)) < 0) { if (ret == -EBUSY && (retries++ < 5)) { usleep(200*1000); goto retry; } VIR_WARN("Failed to remove cgroup for %s", vm->def->name); } if (qemudRemoveDomainStatus(conn, driver, vm) < 0) { VIR_WARN(_("Failed to remove domain status for %s"), vm->def->name); } if ((ret = virFileDeletePid(driver->stateDir, vm->def->name)) != 0) { char ebuf[1024]; VIR_WARN(_("Failed to remove PID file for %s: %s"), vm->def->name, virStrerror(errno, ebuf, sizeof ebuf)); } vm->pid = -1; vm->def->id = -1; vm->state = VIR_DOMAIN_SHUTOFF; VIR_FREE(vm->vcpupids); vm->nvcpupids = 0; if (vm->newDef) { virDomainDefFree(vm->def); vm->def = vm->newDef; vm->def->id = -1; vm->newDef = NULL; } } static void qemudDispatchVMEvent(int watch, int fd, int events, void *opaque) { struct qemud_driver *driver = opaque; virDomainObjPtr vm = NULL; virDomainEventPtr event = NULL; unsigned int i; int quit = 0, failed = 0; qemuDriverLock(driver); for (i = 0 ; i < driver->domains.count ; i++) { virDomainObjPtr tmpvm = driver->domains.objs[i]; virDomainObjLock(tmpvm); if (virDomainIsActive(tmpvm) && tmpvm->monitorWatch == watch) { vm = tmpvm; break; } virDomainObjUnlock(tmpvm); } if (!vm) goto cleanup; if (vm->monitor != fd) { failed = 1; } else { if (events & (VIR_EVENT_HANDLE_HANGUP | VIR_EVENT_HANDLE_ERROR)) quit = 1; else { VIR_ERROR(_("unhandled fd event %d for %s"), events, vm->def->name); failed = 1; } } if (failed || quit) { event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED, quit ? VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN : VIR_DOMAIN_EVENT_STOPPED_FAILED); qemudShutdownVMDaemon(NULL, driver, vm); if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } } cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); } /* Throw away any data available on the monitor * This is done before executing a command, in order * to allow re-synchronization if something went badly * wrong in the past. it also deals with problem of * QEMU *sometimes* re-printing its initial greeting * when we reconnect to the monitor after restarts. */ static void qemuMonitorDiscardPendingData(virDomainObjPtr vm) { char buf[1024]; int ret = 0; /* Monitor is non-blocking, so just loop till we * get -1 or 0. Don't bother with detecting * errors, since we'll deal with that better later */ do { ret = read(vm->monitor, buf, sizeof (buf)-1); } while (ret > 0); } static int qemudMonitorSendUnix(const virDomainObjPtr vm, const char *cmd, size_t cmdlen, int scm_fd) { struct msghdr msg; struct iovec iov[1]; ssize_t ret; memset(&msg, 0, sizeof(msg)); iov[0].iov_base = (void *)cmd; iov[0].iov_len = cmdlen; msg.msg_iov = iov; msg.msg_iovlen = 1; if (scm_fd != -1) { char control[CMSG_SPACE(sizeof(int))]; struct cmsghdr *cmsg; msg.msg_control = control; msg.msg_controllen = sizeof(control); cmsg = CMSG_FIRSTHDR(&msg); cmsg->cmsg_len = CMSG_LEN(sizeof(int)); cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; memcpy(CMSG_DATA(cmsg), &scm_fd, sizeof(int)); } do { ret = sendmsg(vm->monitor, &msg, 0); } while (ret < 0 && errno == EINTR); return ret == cmdlen ? 0 : -1; } static int qemudMonitorSend(const virDomainObjPtr vm, const char *cmd, int scm_fd) { char *full; size_t len; int ret = -1; if (virAsprintf(&full, "%s\r", cmd) < 0) return -1; len = strlen(full); switch (vm->monitor_chr->type) { case VIR_DOMAIN_CHR_TYPE_UNIX: if (qemudMonitorSendUnix(vm, full, len, scm_fd) < 0) goto out; break; default: case VIR_DOMAIN_CHR_TYPE_PTY: if (safewrite(vm->monitor, full, len) != len) goto out; break; } ret = 0; out: VIR_FREE(full); return ret; } static int qemudMonitorCommandWithHandler(const virDomainObjPtr vm, const char *cmd, const char *extraPrompt, qemudMonitorExtraPromptHandler extraHandler, void *handlerData, int scm_fd, char **reply) { int size = 0; char *buf = NULL; /* Should never happen, but just in case, protect * against null monitor (ocurrs when VM is inactive) */ if (!vm->monitor_chr) return -1; qemuMonitorDiscardPendingData(vm); if (qemudMonitorSend(vm, cmd, scm_fd) < 0) return -1; *reply = NULL; for (;;) { struct pollfd fd = { vm->monitor, POLLIN | POLLERR | POLLHUP, 0 }; char *tmp; /* Read all the data QEMU has sent thus far */ for (;;) { char data[1024]; int got = read(vm->monitor, data, sizeof(data)); if (got == 0) goto error; if (got < 0) { if (errno == EINTR) continue; if (errno == EAGAIN) break; goto error; } if (VIR_REALLOC_N(buf, size+got+1) < 0) goto error; memmove(buf+size, data, got); buf[size+got] = '\0'; size += got; } /* Look for QEMU prompt to indicate completion */ if (buf) { char *foundPrompt; if (extraPrompt && (foundPrompt = strstr(buf, extraPrompt)) != NULL) { char *promptEnd; if (extraHandler(vm, buf, foundPrompt, handlerData) < 0) return -1; /* Discard output so far, necessary to detect whether extraPrompt appears again. We don't need the output between original command and this prompt anyway. */ promptEnd = foundPrompt + strlen(extraPrompt); memmove(buf, promptEnd, strlen(promptEnd)+1); size -= promptEnd - buf; } else if ((tmp = strstr(buf, QEMU_CMD_PROMPT)) != NULL) { char *commptr = NULL, *nlptr = NULL; /* Preserve the newline */ tmp[1] = '\0'; /* The monitor doesn't dump clean output after we have written to * it. Every character we write dumps a bunch of useless stuff, * so the result looks like "cXcoXcomXcommXcommaXcommanXcommand" * Try to throw away everything before the first full command * occurence, and inbetween the command and the newline starting * the response */ if ((commptr = strstr(buf, cmd))) { memmove(buf, commptr, strlen(commptr)+1); if ((nlptr = strchr(buf, '\n'))) memmove(buf+strlen(cmd), nlptr, strlen(nlptr)+1); } break; } } pollagain: /* Need to wait for more data */ if (poll(&fd, 1, -1) < 0) { if (errno == EINTR) goto pollagain; goto error; } } *reply = buf; return 0; error: VIR_FREE(buf); return -1; } struct extraHandlerData { const char *reply; bool first; }; static int qemudMonitorCommandSimpleExtraHandler(const virDomainObjPtr vm, const char *buf ATTRIBUTE_UNUSED, const char *prompt ATTRIBUTE_UNUSED, void *data_) { struct extraHandlerData *data = data_; if (!data->first) return 0; if (qemudMonitorSend(vm, data->reply, -1) < 0) return -1; data->first = false; return 0; } static int qemudMonitorCommandExtra(const virDomainObjPtr vm, const char *cmd, const char *extra, const char *extraPrompt, int scm_fd, char **reply) { struct extraHandlerData data; data.reply = extra; data.first = true; return qemudMonitorCommandWithHandler(vm, cmd, extraPrompt, qemudMonitorCommandSimpleExtraHandler, &data, scm_fd, reply); } static int qemudMonitorCommandWithFd(const virDomainObjPtr vm, const char *cmd, int scm_fd, char **reply) { return qemudMonitorCommandExtra(vm, cmd, NULL, NULL, scm_fd, reply); } static int qemudMonitorCommand(const virDomainObjPtr vm, const char *cmd, char **reply) { return qemudMonitorCommandWithFd(vm, cmd, -1, reply); } static virDrvOpenStatus qemudOpen(virConnectPtr conn, virConnectAuthPtr auth ATTRIBUTE_UNUSED, int flags ATTRIBUTE_UNUSED) { if (conn->uri == NULL) { if (qemu_driver == NULL) return VIR_DRV_OPEN_DECLINED; conn->uri = xmlParseURI(qemu_driver->privileged ? "qemu:///system" : "qemu:///session"); if (!conn->uri) { virReportOOMError(conn); return VIR_DRV_OPEN_ERROR; } } else { /* If URI isn't 'qemu' its definitely not for us */ if (conn->uri->scheme == NULL || STRNEQ(conn->uri->scheme, "qemu")) return VIR_DRV_OPEN_DECLINED; /* Allow remote driver to deal with URIs with hostname server */ if (conn->uri->server != NULL) return VIR_DRV_OPEN_DECLINED; if (qemu_driver == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("qemu state driver is not active")); return VIR_DRV_OPEN_ERROR; } if (qemu_driver->privileged) { if (STRNEQ (conn->uri->path, "/system") && STRNEQ (conn->uri->path, "/session")) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("unexpected QEMU URI path '%s', try qemu:///system"), conn->uri->path); return VIR_DRV_OPEN_ERROR; } } else { if (STRNEQ (conn->uri->path, "/session")) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("unexpected QEMU URI path '%s', try qemu:///session"), conn->uri->path); return VIR_DRV_OPEN_ERROR; } } } conn->privateData = qemu_driver; return VIR_DRV_OPEN_SUCCESS; } static int qemudClose(virConnectPtr conn) { struct qemud_driver *driver = conn->privateData; /* Get rid of callbacks registered for this conn */ qemuDriverLock(driver); virDomainEventCallbackListRemoveConn(conn, driver->domainEventCallbacks); qemuDriverUnlock(driver); conn->privateData = NULL; return 0; } /* Which features are supported by this driver? */ static int qemudSupportsFeature (virConnectPtr conn ATTRIBUTE_UNUSED, int feature) { switch (feature) { case VIR_DRV_FEATURE_MIGRATION_V2: return 1; default: return 0; } } static const char *qemudGetType(virConnectPtr conn ATTRIBUTE_UNUSED) { return "QEMU"; } static int kvmGetMaxVCPUs(void) { int maxvcpus = 1; int r, fd; fd = open(KVM_DEVICE, O_RDONLY); if (fd < 0) { virReportSystemError(NULL, errno, _("Unable to open %s"), KVM_DEVICE); return -1; } r = ioctl(fd, KVM_CHECK_EXTENSION, KVM_CAP_NR_VCPUS); if (r > 0) maxvcpus = r; close(fd); return maxvcpus; } static int qemudGetMaxVCPUs(virConnectPtr conn, const char *type) { if (!type) return 16; if (STRCASEEQ(type, "qemu")) return 16; if (STRCASEEQ(type, "kvm")) return kvmGetMaxVCPUs(); if (STRCASEEQ(type, "kqemu")) return 1; qemudReportError(conn, NULL, NULL, VIR_ERR_INVALID_ARG, _("unknown type '%s'"), type); return -1; } static char *qemudGetCapabilities(virConnectPtr conn) { struct qemud_driver *driver = conn->privateData; virCapsPtr caps; char *xml = NULL; qemuDriverLock(driver); if ((caps = qemudCapsInit(qemu_driver->caps)) == NULL) { virReportOOMError(conn); goto cleanup; } if (qemu_driver->securityDriver && qemudSecurityCapsInit(qemu_driver->securityDriver, caps) < 0) { virCapabilitiesFree(caps); virReportOOMError(conn); goto cleanup; } virCapabilitiesFree(qemu_driver->caps); qemu_driver->caps = caps; if ((xml = virCapabilitiesFormatXML(driver->caps)) == NULL) virReportOOMError(conn); cleanup: qemuDriverUnlock(driver); return xml; } static int qemudGetProcessInfo(unsigned long long *cpuTime, int *lastCpu, int pid, int tid) { char proc[PATH_MAX]; FILE *pidinfo; unsigned long long usertime, systime; int cpu; int ret; if (tid) ret = snprintf(proc, sizeof(proc), "/proc/%d/task/%d/stat", pid, tid); else ret = snprintf(proc, sizeof(proc), "/proc/%d/stat", pid); if (ret >= (int)sizeof(proc)) { errno = E2BIG; return -1; } if (!(pidinfo = fopen(proc, "r"))) { /*printf("cannot read pid info");*/ /* VM probably shut down, so fake 0 */ if (cpuTime) *cpuTime = 0; if (lastCpu) *lastCpu = 0; return 0; } /* See 'man proc' for information about what all these fields are. We're * only interested in a very few of them */ if (fscanf(pidinfo, /* pid -> stime */ "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu" /* cutime -> endcode */ "%*d %*d %*d %*d %*d %*u %*u %*d %*u %*u %*u %*u" /* startstack -> processor */ "%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*d %d", &usertime, &systime, &cpu) != 3) { fclose(pidinfo); VIR_WARN0("cannot parse process status data"); errno = -EINVAL; return -1; } /* We got jiffies * We want nanoseconds * _SC_CLK_TCK is jiffies per second * So calulate thus.... */ if (cpuTime) *cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime) / (unsigned long long)sysconf(_SC_CLK_TCK); if (lastCpu) *lastCpu = cpu; VIR_DEBUG("Got status for %d/%d user=%llu sys=%llu cpu=%d", pid, tid, usertime, systime, cpu); fclose(pidinfo); return 0; } static virDomainPtr qemudDomainLookupByID(virConnectPtr conn, int id) { struct qemud_driver *driver = conn->privateData; virDomainObjPtr vm; virDomainPtr dom = NULL; qemuDriverLock(driver); vm = virDomainFindByID(&driver->domains, id); qemuDriverUnlock(driver); if (!vm) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching id %d"), id); goto cleanup; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; cleanup: if (vm) virDomainObjUnlock(vm); return dom; } static virDomainPtr qemudDomainLookupByUUID(virConnectPtr conn, const unsigned char *uuid) { struct qemud_driver *driver = conn->privateData; virDomainObjPtr vm; virDomainPtr dom = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; cleanup: if (vm) virDomainObjUnlock(vm); return dom; } static virDomainPtr qemudDomainLookupByName(virConnectPtr conn, const char *name) { struct qemud_driver *driver = conn->privateData; virDomainObjPtr vm; virDomainPtr dom = NULL; qemuDriverLock(driver); vm = virDomainFindByName(&driver->domains, name); qemuDriverUnlock(driver); if (!vm) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching name '%s'"), name); goto cleanup; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; cleanup: if (vm) virDomainObjUnlock(vm); return dom; } static int qemudGetVersion(virConnectPtr conn, unsigned long *version) { struct qemud_driver *driver = conn->privateData; int ret = -1; qemuDriverLock(driver); if (qemudExtractVersion(conn, driver) < 0) goto cleanup; *version = qemu_driver->qemuVersion; ret = 0; cleanup: qemuDriverUnlock(driver); return ret; } static char * qemudGetHostname (virConnectPtr conn) { char *result; result = virGetHostname(); if (result == NULL) { virReportSystemError (conn, errno, "%s", _("failed to determine host name")); return NULL; } /* Caller frees this string. */ return result; } static int qemudListDomains(virConnectPtr conn, int *ids, int nids) { struct qemud_driver *driver = conn->privateData; int got = 0, i; qemuDriverLock(driver); for (i = 0 ; i < driver->domains.count && got < nids ; i++) { virDomainObjLock(driver->domains.objs[i]); if (virDomainIsActive(driver->domains.objs[i])) ids[got++] = driver->domains.objs[i]->def->id; virDomainObjUnlock(driver->domains.objs[i]); } qemuDriverUnlock(driver); return got; } static int qemudNumDomains(virConnectPtr conn) { struct qemud_driver *driver = conn->privateData; int n = 0, i; qemuDriverLock(driver); for (i = 0 ; i < driver->domains.count ; i++) { virDomainObjLock(driver->domains.objs[i]); if (virDomainIsActive(driver->domains.objs[i])) n++; virDomainObjUnlock(driver->domains.objs[i]); } qemuDriverUnlock(driver); return n; } static virDomainPtr qemudDomainCreate(virConnectPtr conn, const char *xml, unsigned int flags ATTRIBUTE_UNUSED) { struct qemud_driver *driver = conn->privateData; virDomainDefPtr def; virDomainObjPtr vm = NULL; virDomainPtr dom = NULL; virDomainEventPtr event = NULL; qemuDriverLock(driver); if (!(def = virDomainDefParseString(conn, driver->caps, xml, VIR_DOMAIN_XML_INACTIVE))) goto cleanup; if (virSecurityDriverVerify(conn, def) < 0) goto cleanup; /* See if a VM with matching UUID already exists */ vm = virDomainFindByUUID(&driver->domains, def->uuid); if (vm) { /* UUID matches, but if names don't match, refuse it */ if (STRNEQ(vm->def->name, def->name)) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(vm->def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined with uuid %s"), vm->def->name, uuidstr); goto cleanup; } /* UUID & name match, but if VM is already active, refuse it */ if (virDomainIsActive(vm)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain is already active as '%s'"), vm->def->name); goto cleanup; } virDomainObjUnlock(vm); } else { /* UUID does not match, but if a name matches, refuse it */ vm = virDomainFindByName(&driver->domains, def->name); if (vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(vm->def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined with uuid %s"), def->name, uuidstr); goto cleanup; } } if (!(vm = virDomainAssignDef(conn, &driver->domains, def))) goto cleanup; def = NULL; if (qemudStartVMDaemon(conn, driver, vm, NULL, -1) < 0) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; goto cleanup; } event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_BOOTED); dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; cleanup: virDomainDefFree(def); if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return dom; } static int qemudDomainSuspend(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; char *info; virDomainObjPtr vm; int ret = -1; virDomainEventPtr event = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } if (vm->state != VIR_DOMAIN_PAUSED) { if (qemudMonitorCommand(vm, "stop", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("suspend operation failed")); goto cleanup; } vm->state = VIR_DOMAIN_PAUSED; qemudDebug("Reply %s", info); event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_SUSPENDED, VIR_DOMAIN_EVENT_SUSPENDED_PAUSED); VIR_FREE(info); } if (virDomainSaveStatus(dom->conn, driver->stateDir, vm) < 0) goto cleanup; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } static int qemudDomainResume(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; char *info; virDomainObjPtr vm; int ret = -1; virDomainEventPtr event = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } if (vm->state == VIR_DOMAIN_PAUSED) { if (qemudMonitorCommand(vm, "cont", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("resume operation failed")); goto cleanup; } vm->state = VIR_DOMAIN_RUNNING; qemudDebug("Reply %s", info); event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_RESUMED, VIR_DOMAIN_EVENT_RESUMED_UNPAUSED); VIR_FREE(info); } if (virDomainSaveStatus(dom->conn, driver->stateDir, vm) < 0) goto cleanup; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } static int qemudDomainShutdown(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char* info; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } if (qemudMonitorCommand(vm, "system_powerdown", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("shutdown operation failed")); goto cleanup; } VIR_FREE(info); ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainDestroy(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int ret = -1; virDomainEventPtr event = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } qemudShutdownVMDaemon(dom->conn, driver, vm); event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_DESTROYED); if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } static char *qemudDomainGetOSType(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char *type = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!(type = strdup(vm->def->os.type))) virReportOOMError(dom->conn); cleanup: if (vm) virDomainObjUnlock(vm); return type; } /* Returns max memory in kb, 0 if error */ static unsigned long qemudDomainGetMaxMemory(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; unsigned long ret = 0; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } ret = vm->def->maxmem; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainSetMaxMemory(virDomainPtr dom, unsigned long newmax) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (newmax < vm->def->memory) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("cannot set max memory lower than current memory")); goto cleanup;; } vm->def->maxmem = newmax; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } /* The reply from QEMU contains 'ballon: actual=421' where value is in MB */ #define BALLOON_PREFIX "balloon: actual=" /* * Returns: 0 if balloon not supported, +1 if balloon query worked * or -1 on failure */ static int qemudDomainGetMemoryBalloon(virConnectPtr conn, virDomainObjPtr vm, unsigned long *currmem) { char *reply = NULL; int ret = -1; char *offset; if (!virDomainIsActive(vm)) return 0; if (qemudMonitorCommand(vm, "info balloon", &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("could not query memory balloon allocation")); goto cleanup; } DEBUG ("%s: balloon reply: '%s'", vm->def->name, reply); if ((offset = strstr(reply, BALLOON_PREFIX)) != NULL) { unsigned int memMB; char *end; offset += strlen(BALLOON_PREFIX); if (virStrToLong_ui(offset, &end, 10, &memMB) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("could not parse memory balloon allocation")); goto cleanup; } *currmem = memMB * 1024; ret = 1; } else { /* We don't raise an error here, since its to be expected that * many QEMU's don't support ballooning */ ret = 0; } cleanup: VIR_FREE(reply); return ret; } /* * Returns: 0 if balloon not supported, +1 if balloon query worked * or -1 on failure */ static int qemudDomainSetMemoryBalloon(virConnectPtr conn, virDomainObjPtr vm, unsigned long newmem) { char *cmd; char *reply = NULL; int ret = -1; /* * 'newmem' is in KB, QEMU monitor works in MB, and we all wish * we just worked in bytes with unsigned long long everywhere. */ if (virAsprintf(&cmd, "balloon %lu", (newmem / 1024)) < 0) { virReportOOMError(conn); goto cleanup; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("could not balloon memory allocation")); VIR_FREE(cmd); goto cleanup; } VIR_FREE(cmd); /* If the command failed qemu prints: 'unknown command' * No message is printed on success it seems */ DEBUG ("%s: balloon reply: %s",vm->def->name, reply); if (strstr(reply, "\nunknown command:")) { /* Don't set error - it is expected memory balloon fails on many qemu */ ret = 0; } else { ret = 1; } cleanup: VIR_FREE(reply); return ret; } static int qemudDomainSetMemory(virDomainPtr dom, unsigned long newmem) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (newmem > vm->def->maxmem) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("cannot set memory higher than max memory")); goto cleanup; } if (virDomainIsActive(vm)) { ret = qemudDomainSetMemoryBalloon(dom->conn, vm, newmem); if (ret == 0) qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("cannot set memory of an active domain")); } else { vm->def->memory = newmem; ret = 0; } cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainGetInfo(virDomainPtr dom, virDomainInfoPtr info) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int ret = -1; int err; unsigned long balloon; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } info->state = vm->state; if (!virDomainIsActive(vm)) { info->cpuTime = 0; } else { if (qemudGetProcessInfo(&(info->cpuTime), NULL, vm->pid, 0) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, ("cannot read cputime for domain")); goto cleanup; } } info->maxMem = vm->def->maxmem; if (virDomainIsActive(vm)) { err = qemudDomainGetMemoryBalloon(dom->conn, vm, &balloon); if (err < 0) goto cleanup; if (err == 0) /* Balloon not supported, so maxmem is always the allocation */ info->memory = vm->def->maxmem; else info->memory = balloon; } else { info->memory = vm->def->memory; } info->nrVirtCpu = vm->def->vcpus; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static char *qemudEscape(const char *in, int shell) { int len = 0; int i, j; char *out; /* To pass through the QEMU monitor, we need to use escape sequences: \r, \n, \", \\ To pass through both QEMU + the shell, we need to escape the single character ' as the five characters '\\'' */ for (i = 0; in[i] != '\0'; i++) { switch(in[i]) { case '\r': case '\n': case '"': case '\\': len += 2; break; case '\'': if (shell) len += 5; else len += 1; break; default: len += 1; break; } } if (VIR_ALLOC_N(out, len + 1) < 0) return NULL; for (i = j = 0; in[i] != '\0'; i++) { switch(in[i]) { case '\r': out[j++] = '\\'; out[j++] = 'r'; break; case '\n': out[j++] = '\\'; out[j++] = 'n'; break; case '"': case '\\': out[j++] = '\\'; out[j++] = in[i]; break; case '\'': if (shell) { out[j++] = '\''; out[j++] = '\\'; out[j++] = '\\'; out[j++] = '\''; out[j++] = '\''; } else { out[j++] = in[i]; } break; default: out[j++] = in[i]; break; } } out[j] = '\0'; return out; } static char *qemudEscapeMonitorArg(const char *in) { return qemudEscape(in, 0); } static char *qemudEscapeShellArg(const char *in) { return qemudEscape(in, 1); } #define QEMUD_SAVE_MAGIC "LibvirtQemudSave" #define QEMUD_SAVE_VERSION 2 enum qemud_save_formats { QEMUD_SAVE_FORMAT_RAW = 0, QEMUD_SAVE_FORMAT_GZIP = 1, QEMUD_SAVE_FORMAT_BZIP2 = 2, /* * Deprecated by xz and never used as part of a release * QEMUD_SAVE_FORMAT_LZMA */ QEMUD_SAVE_FORMAT_XZ = 3, QEMUD_SAVE_FORMAT_LZOP = 4, /* Note: add new members only at the end. These values are used in the on-disk format. Do not change or re-use numbers. */ QEMUD_SAVE_FORMAT_LAST }; VIR_ENUM_DECL(qemudSaveCompression) VIR_ENUM_IMPL(qemudSaveCompression, QEMUD_SAVE_FORMAT_LAST, "raw", "gzip", "bzip2", "xz", "lzop") struct qemud_save_header { char magic[sizeof(QEMUD_SAVE_MAGIC)-1]; int version; int xml_len; int was_running; int compressed; int unused[15]; }; static int qemudDomainSave(virDomainPtr dom, const char *path) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char *command = NULL; char *info = NULL; int fd = -1; char *safe_path = NULL; char *xml = NULL; struct qemud_save_header header; int ret = -1; virDomainEventPtr event = NULL; int internalret; memset(&header, 0, sizeof(header)); memcpy(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic)); header.version = QEMUD_SAVE_VERSION; if (driver->saveImageFormat == NULL) header.compressed = QEMUD_SAVE_FORMAT_RAW; else { header.compressed = qemudSaveCompressionTypeFromString(driver->saveImageFormat); if (header.compressed < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("Invalid save image format specified " "in configuration file")); return -1; } } qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } /* Pause */ if (vm->state == VIR_DOMAIN_RUNNING) { header.was_running = 1; if (qemudMonitorCommand(vm, "stop", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("suspend operation failed")); goto cleanup; } vm->state = VIR_DOMAIN_PAUSED; qemudDebug("Reply %s", info); VIR_FREE(info); } /* Get XML for the domain */ xml = virDomainDefFormat(dom->conn, vm->def, VIR_DOMAIN_XML_SECURE); if (!xml) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to get domain xml")); goto cleanup; } header.xml_len = strlen(xml) + 1; /* Write header to file, followed by XML */ if ((fd = open(path, O_CREAT|O_TRUNC|O_WRONLY, S_IRUSR|S_IWUSR)) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("failed to create '%s'"), path); goto cleanup; } if (safewrite(fd, &header, sizeof(header)) != sizeof(header)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to write save header")); goto cleanup; } if (safewrite(fd, xml, header.xml_len) != header.xml_len) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to write xml")); goto cleanup; } if (close(fd) < 0) { virReportSystemError(dom->conn, errno, _("unable to save file %s"), path); goto cleanup; } fd = -1; /* Migrate to file */ safe_path = qemudEscapeShellArg(path); if (!safe_path) { virReportOOMError(dom->conn); goto cleanup; } const char *prog = qemudSaveCompressionTypeToString(header.compressed); if (prog == NULL) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("Invalid compress format %d"), header.compressed); goto cleanup; } if (STREQ (prog, "raw")) prog = "cat"; internalret = virAsprintf(&command, "migrate \"exec:" "%s -c >> '%s' 2>/dev/null\"", prog, safe_path); if (internalret < 0) { virReportOOMError(dom->conn); goto cleanup; } if (qemudMonitorCommand(vm, command, &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("migrate operation failed")); goto cleanup; } DEBUG ("%s: migrate reply: %s", vm->def->name, info); /* If the command isn't supported then qemu prints: * unknown command: migrate" */ if (strstr(info, "unknown command:")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("'migrate' not supported by this qemu")); goto cleanup; } /* Shut it down */ qemudShutdownVMDaemon(dom->conn, driver, vm); event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_SAVED); if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } ret = 0; cleanup: if (fd != -1) close(fd); VIR_FREE(xml); VIR_FREE(safe_path); VIR_FREE(command); VIR_FREE(info); if (ret != 0) unlink(path); if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } static int qemudDomainCoreDump(virDomainPtr dom, const char *path, int flags ATTRIBUTE_UNUSED) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char *command = NULL; char *info = NULL; char *safe_path = NULL; int resume = 0, paused = 0; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } /* Migrate will always stop the VM, so once we support live dumping the resume condition will stay the same, independent of whether the stop command is issued. */ resume = (vm->state == VIR_DOMAIN_RUNNING); /* Pause domain for non-live dump */ if (vm->state == VIR_DOMAIN_RUNNING) { if (qemudMonitorCommand (vm, "stop", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("suspending before dump failed")); goto cleanup; } DEBUG ("%s: stop reply: %s", vm->def->name, info); VIR_FREE(info); paused = 1; } /* Migrate to file */ safe_path = qemudEscapeShellArg(path); if (!safe_path) { virReportOOMError(dom->conn); goto cleanup; } if (virAsprintf(&command, "migrate \"exec:" "dd of='%s' 2>/dev/null" "\"", safe_path) == -1) { virReportOOMError(dom->conn); command = NULL; goto cleanup; } if (qemudMonitorCommand(vm, command, &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("migrate operation failed")); goto cleanup; } DEBUG ("%s: migrate reply: %s", vm->def->name, info); /* If the command isn't supported then qemu prints: * unknown command: migrate" */ if (strstr(info, "unknown command:")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("'migrate' not supported by this qemu")); goto cleanup; } paused = 1; ret = 0; cleanup: VIR_FREE(safe_path); VIR_FREE(command); VIR_FREE(info); /* Since the monitor is always attached to a pty for libvirt, it will support synchronous operations so we always get here after the migration is complete. */ if (resume && paused) { if (qemudMonitorCommand(vm, "cont", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("resuming after dump failed")); goto cleanup; } DEBUG ("%s: cont reply: %s", vm->def->name, info); VIR_FREE(info); } if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int max; int ret = -1; const char *type; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("cannot change vcpu count of an active domain")); goto cleanup; } if (!(type = virDomainVirtTypeToString(vm->def->virtType))) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("unknown virt type in domain definition '%d'"), vm->def->virtType); goto cleanup; } if ((max = qemudGetMaxVCPUs(dom->conn, type)) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("could not determine max vcpus for the domain")); goto cleanup; } if (nvcpus > max) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("requested vcpus is greater than max allowable" " vcpus for the domain: %d > %d"), nvcpus, max); goto cleanup; } vm->def->vcpus = nvcpus; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } #if HAVE_SCHED_GETAFFINITY static int qemudDomainPinVcpu(virDomainPtr dom, unsigned int vcpu, unsigned char *cpumap, int maplen) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; cpu_set_t mask; int i, maxcpu; virNodeInfo nodeinfo; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s",_("cannot pin vcpus on an inactive domain")); goto cleanup; } if (vcpu > (vm->nvcpupids-1)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("vcpu number out of range %d > %d"), vcpu, vm->nvcpupids); goto cleanup; } if (nodeGetInfo(dom->conn, &nodeinfo) < 0) goto cleanup; maxcpu = maplen * 8; if (maxcpu > nodeinfo.cpus) maxcpu = nodeinfo.cpus; CPU_ZERO(&mask); for (i = 0 ; i < maxcpu ; i++) { if ((cpumap[i/8] >> (i % 8)) & 1) CPU_SET(i, &mask); } if (vm->vcpupids != NULL) { if (sched_setaffinity(vm->vcpupids[vcpu], sizeof(mask), &mask) < 0) { virReportSystemError(dom->conn, errno, "%s", _("cannot set affinity")); goto cleanup; } } else { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("cpu affinity is not supported")); goto cleanup; } ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainGetVcpus(virDomainPtr dom, virVcpuInfoPtr info, int maxinfo, unsigned char *cpumaps, int maplen) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virNodeInfo nodeinfo; int i, v, maxcpu; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s",_("cannot pin vcpus on an inactive domain")); goto cleanup; } if (nodeGetInfo(dom->conn, &nodeinfo) < 0) goto cleanup; maxcpu = maplen * 8; if (maxcpu > nodeinfo.cpus) maxcpu = nodeinfo.cpus; /* Clamp to actual number of vcpus */ if (maxinfo > vm->nvcpupids) maxinfo = vm->nvcpupids; if (maxinfo >= 1) { if (info != NULL) { memset(info, 0, sizeof(*info) * maxinfo); for (i = 0 ; i < maxinfo ; i++) { info[i].number = i; info[i].state = VIR_VCPU_RUNNING; if (vm->vcpupids != NULL && qemudGetProcessInfo(&(info[i].cpuTime), &(info[i].cpu), vm->pid, vm->vcpupids[i]) < 0) { virReportSystemError(dom->conn, errno, "%s", _("cannot get vCPU placement & pCPU time")); goto cleanup; } } } if (cpumaps != NULL) { memset(cpumaps, 0, maplen * maxinfo); if (vm->vcpupids != NULL) { for (v = 0 ; v < maxinfo ; v++) { cpu_set_t mask; unsigned char *cpumap = VIR_GET_CPUMAP(cpumaps, maplen, v); CPU_ZERO(&mask); if (sched_getaffinity(vm->vcpupids[v], sizeof(mask), &mask) < 0) { virReportSystemError(dom->conn, errno, "%s", _("cannot get affinity")); goto cleanup; } for (i = 0 ; i < maxcpu ; i++) if (CPU_ISSET(i, &mask)) VIR_USE_CPU(cpumap, i); } } else { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("cpu affinity is not available")); goto cleanup; } } } ret = maxinfo; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } #endif /* HAVE_SCHED_GETAFFINITY */ static int qemudDomainGetMaxVcpus(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; const char *type; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!(type = virDomainVirtTypeToString(vm->def->virtType))) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("unknown virt type in domain definition '%d'"), vm->def->virtType); goto cleanup; } ret = qemudGetMaxVCPUs(dom->conn, type); cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr seclabel) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm; const char *type; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); memset(seclabel, 0, sizeof(*seclabel)); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!(type = virDomainVirtTypeToString(vm->def->virtType))) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("unknown virt type in domain definition '%d'"), vm->def->virtType); goto cleanup; } /* * Theoretically, the pid can be replaced during this operation and * return the label of a different process. If atomicity is needed, * further validation will be required. * * Comment from Dan Berrange: * * Well the PID as stored in the virDomainObjPtr can't be changed * because you've got a locked object. The OS level PID could have * exited, though and in extreme circumstances have cycled through all * PIDs back to ours. We could sanity check that our PID still exists * after reading the label, by checking that our FD connecting to the * QEMU monitor hasn't seen SIGHUP/ERR on poll(). */ if (virDomainIsActive(vm)) { if (driver->securityDriver && driver->securityDriver->domainGetSecurityLabel) { if (driver->securityDriver->domainGetSecurityLabel(dom->conn, vm, seclabel) == -1) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Failed to get security label")); goto cleanup; } } } ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); qemuDriverUnlock(driver); return ret; } static int qemudNodeGetSecurityModel(virConnectPtr conn, virSecurityModelPtr secmodel) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; char *p; int ret = 0; qemuDriverLock(driver); if (!driver->securityDriver) { memset(secmodel, 0, sizeof (*secmodel)); goto cleanup; } p = driver->caps->host.secModel.model; if (strlen(p) >= VIR_SECURITY_MODEL_BUFLEN-1) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("security model string exceeds max %d bytes"), VIR_SECURITY_MODEL_BUFLEN-1); ret = -1; goto cleanup; } strcpy(secmodel->model, p); p = driver->caps->host.secModel.doi; if (strlen(p) >= VIR_SECURITY_DOI_BUFLEN-1) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("security DOI string exceeds max %d bytes"), VIR_SECURITY_DOI_BUFLEN-1); ret = -1; goto cleanup; } strcpy(secmodel->doi, p); cleanup: qemuDriverUnlock(driver); return ret; } /* TODO: check seclabel restore */ static int qemudDomainRestore(virConnectPtr conn, const char *path) { struct qemud_driver *driver = conn->privateData; virDomainDefPtr def = NULL; virDomainObjPtr vm = NULL; int fd = -1; int ret = -1; char *xml = NULL; struct qemud_save_header header; virDomainEventPtr event = NULL; int intermediatefd = -1; pid_t intermediate_pid = -1; int childstat; qemuDriverLock(driver); /* Verify the header and read the XML */ if ((fd = open(path, O_RDONLY)) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot read domain image")); goto cleanup; } if (saferead(fd, &header, sizeof(header)) != sizeof(header)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to read qemu header")); goto cleanup; } if (memcmp(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic)) != 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("image magic is incorrect")); goto cleanup; } if (header.version > QEMUD_SAVE_VERSION) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("image version is not supported (%d > %d)"), header.version, QEMUD_SAVE_VERSION); goto cleanup; } if (VIR_ALLOC_N(xml, header.xml_len) < 0) { virReportOOMError(conn); goto cleanup; } if (saferead(fd, xml, header.xml_len) != header.xml_len) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to read XML")); goto cleanup; } /* Create a domain from this XML */ if (!(def = virDomainDefParseString(conn, driver->caps, xml, VIR_DOMAIN_XML_INACTIVE))) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to parse XML")); goto cleanup; } /* See if a VM with matching UUID already exists */ vm = virDomainFindByUUID(&driver->domains, def->uuid); if (vm) { /* UUID matches, but if names don't match, refuse it */ if (STRNEQ(vm->def->name, def->name)) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(vm->def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined with uuid %s"), vm->def->name, uuidstr); goto cleanup; } /* UUID & name match, but if VM is already active, refuse it */ if (virDomainIsActive(vm)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_INVALID, _("domain is already active as '%s'"), vm->def->name); goto cleanup; } virDomainObjUnlock(vm); } else { /* UUID does not match, but if a name matches, refuse it */ vm = virDomainFindByName(&driver->domains, def->name); if (vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(vm->def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined with uuid %s"), def->name, uuidstr); goto cleanup; } } if (!(vm = virDomainAssignDef(conn, &driver->domains, def))) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to assign new VM")); goto cleanup; } def = NULL; if (header.version == 2) { const char *intermediate_argv[3] = { NULL, "-dc", NULL }; if (header.compressed == QEMUD_SAVE_FORMAT_GZIP) intermediate_argv[0] = "gzip"; else if (header.compressed == QEMUD_SAVE_FORMAT_BZIP2) intermediate_argv[0] = "bzip2"; else if (header.compressed == QEMUD_SAVE_FORMAT_XZ) intermediate_argv[0] = "xz"; else if (header.compressed == QEMUD_SAVE_FORMAT_LZOP) intermediate_argv[0] = "lzop"; else if (header.compressed != QEMUD_SAVE_FORMAT_RAW) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("Unknown compressed save format %d"), header.compressed); goto cleanup; } if (intermediate_argv[0] != NULL) { intermediatefd = fd; fd = -1; if (virExec(conn, intermediate_argv, NULL, NULL, &intermediate_pid, intermediatefd, &fd, NULL, 0) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Failed to start decompression binary %s"), intermediate_argv[0]); goto cleanup; } } } /* Set the migration source and start it up. */ ret = qemudStartVMDaemon(conn, driver, vm, "stdio", fd); if (intermediate_pid != -1) { /* Wait for intermediate process to exit */ while (waitpid(intermediate_pid, &childstat, 0) == -1 && errno == EINTR); } if (intermediatefd != -1) close(intermediatefd); close(fd); fd = -1; if (ret < 0) { if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } goto cleanup; } event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_RESTORED); /* If it was running before, resume it now. */ if (header.was_running) { char *info; if (qemudMonitorCommand(vm, "cont", &info) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to resume domain")); goto cleanup; } VIR_FREE(info); vm->state = VIR_DOMAIN_RUNNING; virDomainSaveStatus(conn, driver->stateDir, vm); } ret = 0; cleanup: virDomainDefFree(def); VIR_FREE(xml); if (fd != -1) close(fd); if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } static char *qemudDomainDumpXML(virDomainPtr dom, int flags) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char *ret = NULL; unsigned long balloon; int err; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } /* Refresh current memory based on balloon info */ err = qemudDomainGetMemoryBalloon(dom->conn, vm, &balloon); if (err < 0) goto cleanup; if (err > 0) vm->def->memory = balloon; ret = virDomainDefFormat(dom->conn, (flags & VIR_DOMAIN_XML_INACTIVE) && vm->newDef ? vm->newDef : vm->def, flags); cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static char *qemuDomainXMLFromNative(virConnectPtr conn, const char *format, const char *config, unsigned int flags ATTRIBUTE_UNUSED) { struct qemud_driver *driver = conn->privateData; virDomainDefPtr def = NULL; char *xml = NULL; if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INVALID_ARG, _("unsupported config type %s"), format); goto cleanup; } def = qemuParseCommandLineString(conn, driver->caps, config); if (!def) goto cleanup; xml = virDomainDefFormat(conn, def, VIR_DOMAIN_XML_INACTIVE); cleanup: virDomainDefFree(def); return xml; } static char *qemuDomainXMLToNative(virConnectPtr conn, const char *format, const char *xmlData, unsigned int flags ATTRIBUTE_UNUSED) { struct qemud_driver *driver = conn->privateData; virDomainDefPtr def = NULL; virDomainChrDef monitor_chr; const char *emulator; unsigned int qemuCmdFlags; struct stat sb; const char **retargv = NULL; const char **retenv = NULL; const char **tmp; virBuffer buf = VIR_BUFFER_INITIALIZER; char *ret = NULL; int i; qemuDriverLock(driver); if (STRNEQ(format, QEMU_CONFIG_FORMAT_ARGV)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INVALID_ARG, _("unsupported config type %s"), format); goto cleanup; } def = virDomainDefParseString(conn, driver->caps, xmlData, 0); if (!def) goto cleanup; /* Since we're just exporting args, we can't do bridge/network * setups, since libvirt will normally create TAP devices * directly. We convert those configs into generic 'ethernet' * config and assume the user has suitable 'ifup-qemu' scripts */ for (i = 0 ; i < def->nnets ; i++) { virDomainNetDefPtr net = def->nets[i]; if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) { VIR_FREE(net->data.network.name); memset(net, 0, sizeof *net); net->type = VIR_DOMAIN_NET_TYPE_ETHERNET; net->data.ethernet.dev = NULL; net->data.ethernet.script = NULL; net->data.ethernet.ipaddr = NULL; } else if (net->type == VIR_DOMAIN_NET_TYPE_BRIDGE) { char *brname = net->data.bridge.brname; char *script = net->data.bridge.script; char *ipaddr = net->data.bridge.ipaddr; memset(net, 0, sizeof *net); net->type = VIR_DOMAIN_NET_TYPE_ETHERNET; net->data.ethernet.dev = brname; net->data.ethernet.script = script; net->data.ethernet.ipaddr = ipaddr; } } for (i = 0 ; i < def->ngraphics ; i++) { if (def->graphics[i]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC && def->graphics[i]->data.vnc.autoport) def->graphics[i]->data.vnc.port = 5900; } emulator = def->emulator; /* 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(emulator, &sb) < 0) { virReportSystemError(conn, errno, _("Cannot find QEMU binary %s"), emulator); goto cleanup; } if (qemudExtractVersionInfo(emulator, NULL, &qemuCmdFlags) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Cannot determine QEMU argv syntax %s"), emulator); goto cleanup; } if (qemuPrepareMonitorChr(conn, driver, &monitor_chr, def->name) < 0) goto cleanup; if (qemudBuildCommandLine(conn, driver, def, &monitor_chr, qemuCmdFlags, &retargv, &retenv, NULL, NULL, /* Don't want it to create TAP devices */ NULL) < 0) { goto cleanup; } tmp = retenv; while (*tmp) { virBufferAdd(&buf, *tmp, strlen(*tmp)); virBufferAddLit(&buf, " "); tmp++; } tmp = retargv; while (*tmp) { virBufferAdd(&buf, *tmp, strlen(*tmp)); virBufferAddLit(&buf, " "); tmp++; } if (virBufferError(&buf)) goto cleanup; ret = virBufferContentAndReset(&buf); cleanup: qemuDriverUnlock(driver); for (tmp = retargv ; tmp && *tmp ; tmp++) VIR_FREE(*tmp); VIR_FREE(retargv); for (tmp = retenv ; tmp && *tmp ; tmp++) VIR_FREE(*tmp); VIR_FREE(retenv); virDomainDefFree(def); return ret; } static int qemudListDefinedDomains(virConnectPtr conn, char **const names, int nnames) { struct qemud_driver *driver = conn->privateData; int got = 0, i; qemuDriverLock(driver); for (i = 0 ; i < driver->domains.count && got < nnames ; i++) { virDomainObjLock(driver->domains.objs[i]); if (!virDomainIsActive(driver->domains.objs[i])) { if (!(names[got++] = strdup(driver->domains.objs[i]->def->name))) { virReportOOMError(conn); virDomainObjUnlock(driver->domains.objs[i]); goto cleanup; } } virDomainObjUnlock(driver->domains.objs[i]); } qemuDriverUnlock(driver); return got; cleanup: for (i = 0 ; i < got ; i++) VIR_FREE(names[i]); qemuDriverUnlock(driver); return -1; } static int qemudNumDefinedDomains(virConnectPtr conn) { struct qemud_driver *driver = conn->privateData; int n = 0, i; qemuDriverLock(driver); for (i = 0 ; i < driver->domains.count ; i++) if (!virDomainIsActive(driver->domains.objs[i])) n++; qemuDriverUnlock(driver); return n; } static int qemudDomainStart(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int ret = -1; virDomainEventPtr event = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } ret = qemudStartVMDaemon(dom->conn, driver, vm, NULL, -1); if (ret != -1) event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_BOOTED); cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } static int qemudCanonicalizeMachineFromInfo(virDomainDefPtr def, virCapsGuestDomainInfoPtr info, char **canonical) { int i; *canonical = NULL; for (i = 0; i < info->nmachines; i++) { virCapsGuestMachinePtr machine = info->machines[i]; if (!machine->canonical) continue; if (strcmp(def->os.machine, machine->name) != 0) continue; if (!(*canonical = strdup(machine->canonical))) { virReportOOMError(NULL); return -1; } break; } return 0; } static int qemudCanonicalizeMachineDirect(virDomainDefPtr def, char **canonical) { virCapsGuestMachinePtr *machines = NULL; int i, nmachines = 0; if (qemudProbeMachineTypes(def->emulator, &machines, &nmachines) < 0) { virReportOOMError(NULL); return -1; } for (i = 0; i < nmachines; i++) { if (!machines[i]->canonical) continue; if (strcmp(def->os.machine, machines[i]->name) != 0) continue; *canonical = machines[i]->canonical; machines[i]->canonical = NULL; break; } virCapabilitiesFreeMachines(machines, nmachines); return 0; } static int qemudCanonicalizeMachine(virConnectPtr conn, virDomainDefPtr def) { struct qemud_driver *driver = conn->privateData; char *canonical = NULL; int i; for (i = 0; i < driver->caps->nguests; i++) { virCapsGuestPtr guest = driver->caps->guests[i]; int j; for (j = 0; j < guest->arch.ndomains; j++) { virCapsGuestDomainPtr dom = guest->arch.domains[j]; if (dom->info.emulator && STREQ(dom->info.emulator, def->emulator)) { if (qemudCanonicalizeMachineFromInfo(def, &dom->info, &canonical) < 0) return -1; if (canonical) goto out; break; } } /* if we matched one of the domain's emulators, or if * we match the default emulator */ if (j < guest->arch.ndomains || (guest->arch.defaultInfo.emulator && STREQ(guest->arch.defaultInfo.emulator, def->emulator))) { if (qemudCanonicalizeMachineFromInfo(def, &guest->arch.defaultInfo, &canonical) < 0) return -1; goto out; } } if (qemudCanonicalizeMachineDirect(def, &canonical) < 0) return -1; out: if (canonical) { VIR_FREE(def->os.machine); def->os.machine = canonical; } return 0; } static virDomainPtr qemudDomainDefine(virConnectPtr conn, const char *xml) { struct qemud_driver *driver = conn->privateData; virDomainDefPtr def; virDomainObjPtr vm = NULL; virDomainPtr dom = NULL; virDomainEventPtr event = NULL; int newVM = 1; qemuDriverLock(driver); if (!(def = virDomainDefParseString(conn, driver->caps, xml, VIR_DOMAIN_XML_INACTIVE))) goto cleanup; if (virSecurityDriverVerify(conn, def) < 0) goto cleanup; /* See if a VM with matching UUID already exists */ vm = virDomainFindByUUID(&driver->domains, def->uuid); if (vm) { /* UUID matches, but if names don't match, refuse it */ if (STRNEQ(vm->def->name, def->name)) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(vm->def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined with uuid %s"), vm->def->name, uuidstr); goto cleanup; } /* UUID & name match */ virDomainObjUnlock(vm); newVM = 0; } else { /* UUID does not match, but if a name matches, refuse it */ vm = virDomainFindByName(&driver->domains, def->name); if (vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(vm->def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined with uuid %s"), def->name, uuidstr); goto cleanup; } } if (qemudCanonicalizeMachine(conn, def) < 0) goto cleanup; if (!(vm = virDomainAssignDef(conn, &driver->domains, def))) { goto cleanup; } def = NULL; vm->persistent = 1; if (virDomainSaveConfig(conn, driver->configDir, vm->newDef ? vm->newDef : vm->def) < 0) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; goto cleanup; } event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_DEFINED, newVM ? VIR_DOMAIN_EVENT_DEFINED_ADDED : VIR_DOMAIN_EVENT_DEFINED_UPDATED); dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; cleanup: virDomainDefFree(def); if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return dom; } static int qemudDomainUndefine(virDomainPtr dom) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virDomainEventPtr event = NULL; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("cannot delete active domain")); goto cleanup; } if (!vm->persistent) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot undefine transient domain")); goto cleanup; } if (virDomainDeleteConfig(dom->conn, driver->configDir, driver->autostartDir, vm) < 0) goto cleanup; event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_UNDEFINED, VIR_DOMAIN_EVENT_UNDEFINED_REMOVED); virDomainRemoveInactive(&driver->domains, vm); vm = NULL; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } /* Return the disks name for use in monitor commands */ static char *qemudDiskDeviceName(const virConnectPtr conn, const virDomainDiskDefPtr disk) { int busid, devid; int ret; char *devname; if (virDiskNameToBusDeviceIndex(disk, &busid, &devid) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("cannot convert disk '%s' to bus/device index"), disk->dst); return NULL; } switch (disk->bus) { case VIR_DOMAIN_DISK_BUS_IDE: if (disk->device== VIR_DOMAIN_DISK_DEVICE_DISK) ret = virAsprintf(&devname, "ide%d-hd%d", busid, devid); else ret = virAsprintf(&devname, "ide%d-cd%d", busid, devid); break; case VIR_DOMAIN_DISK_BUS_SCSI: if (disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) ret = virAsprintf(&devname, "scsi%d-hd%d", busid, devid); else ret = virAsprintf(&devname, "scsi%d-cd%d", busid, devid); break; case VIR_DOMAIN_DISK_BUS_FDC: ret = virAsprintf(&devname, "floppy%d", devid); break; case VIR_DOMAIN_DISK_BUS_VIRTIO: ret = virAsprintf(&devname, "virtio%d", devid); break; default: qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SUPPORT, _("Unsupported disk name mapping for bus '%s'"), virDomainDiskBusTypeToString(disk->bus)); return NULL; } if (ret == -1) { virReportOOMError(conn); return NULL; } return devname; } static int qemudDomainChangeEjectableMedia(virConnectPtr conn, virDomainObjPtr vm, virDomainDeviceDefPtr dev, unsigned int qemuCmdFlags) { virDomainDiskDefPtr origdisk = NULL, newdisk; char *cmd, *reply, *safe_path; char *devname = NULL; int i; origdisk = NULL; newdisk = dev->data.disk; for (i = 0 ; i < vm->def->ndisks ; i++) { if (vm->def->disks[i]->bus == newdisk->bus && STREQ(vm->def->disks[i]->dst, newdisk->dst)) { origdisk = vm->def->disks[i]; break; } } if (!origdisk) { qemudReportError(conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("No device with bus '%s' and target '%s'"), virDomainDiskBusTypeToString(newdisk->bus), newdisk->dst); return -1; } if (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE) { if (!(devname = qemudDiskDeviceName(conn, newdisk))) return -1; } else { /* Back compat for no -drive option */ if (newdisk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY) devname = strdup(newdisk->dst); else if (newdisk->device == VIR_DOMAIN_DISK_DEVICE_CDROM && STREQ(newdisk->dst, "hdc")) devname = strdup("cdrom"); else { qemudReportError(conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("Emulator version does not support removable " "media for device '%s' and target '%s'"), virDomainDiskDeviceTypeToString(newdisk->device), newdisk->dst); return -1; } if (!devname) { virReportOOMError(conn); return -1; } } if (newdisk->src) { safe_path = qemudEscapeMonitorArg(newdisk->src); if (!safe_path) { virReportOOMError(conn); VIR_FREE(devname); return -1; } if (virAsprintf(&cmd, "change %s \"%s\"", devname, safe_path) == -1) { virReportOOMError(conn); VIR_FREE(safe_path); VIR_FREE(devname); return -1; } VIR_FREE(safe_path); } else if (virAsprintf(&cmd, "eject %s", devname) == -1) { virReportOOMError(conn); VIR_FREE(devname); return -1; } VIR_FREE(devname); if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("could not change cdrom media")); VIR_FREE(cmd); return -1; } /* If the command failed qemu prints: * device not found, device is locked ... * No message is printed on success it seems */ DEBUG ("%s: ejectable media change reply: %s", vm->def->name, reply); if (strstr(reply, "\ndevice ")) { qemudReportError (conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("changing cdrom media failed: %s"), reply); VIR_FREE(reply); VIR_FREE(cmd); return -1; } VIR_FREE(reply); VIR_FREE(cmd); VIR_FREE(origdisk->src); origdisk->src = newdisk->src; newdisk->src = NULL; origdisk->type = newdisk->type; return 0; } static int qemudParsePciAddReply(virDomainObjPtr vm, const char *reply, unsigned *domain, unsigned *bus, unsigned *slot) { char *s, *e; DEBUG("%s: pci_add reply: %s", vm->def->name, reply); /* If the command succeeds qemu prints: * OK bus 0, slot XXX... * or * OK domain 0, bus 0, slot XXX */ if (!(s = strstr(reply, "OK "))) return -1; s += 3; if (STRPREFIX(s, "domain ")) { s += strlen("domain "); if (virStrToLong_ui(s, &e, 10, domain) == -1) { VIR_WARN(_("Unable to parse domain number '%s'\n"), s); return -1; } if (!STRPREFIX(e, ", ")) { VIR_WARN(_("Expected ', ' parsing pci_add reply '%s'\n"), s); return -1; } s = e + 2; } if (!STRPREFIX(s, "bus ")) { VIR_WARN(_("Expected 'bus ' parsing pci_add reply '%s'\n"), s); return -1; } s += strlen("bus "); if (virStrToLong_ui(s, &e, 10, bus) == -1) { VIR_WARN(_("Unable to parse bus number '%s'\n"), s); return -1; } if (!STRPREFIX(e, ", ")) { VIR_WARN(_("Expected ', ' parsing pci_add reply '%s'\n"), s); return -1; } s = e + 2; if (!STRPREFIX(s, "slot ")) { VIR_WARN(_("Expected 'slot ' parsing pci_add reply '%s'\n"), s); return -1; } s += strlen("slot "); if (virStrToLong_ui(s, &e, 10, slot) == -1) { VIR_WARN(_("Unable to parse slot number '%s'\n"), s); return -1; } return 0; } static int qemudDomainAttachPciDiskDevice(virConnectPtr conn, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { int ret, i; char *cmd, *reply; char *safe_path; const char* type = virDomainDiskBusTypeToString(dev->data.disk->bus); int tryOldSyntax = 0; unsigned domain, bus, slot; for (i = 0 ; i < vm->def->ndisks ; i++) { if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("target %s already exists"), dev->data.disk->dst); return -1; } } if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks+1) < 0) { virReportOOMError(conn); return -1; } try_command: safe_path = qemudEscapeMonitorArg(dev->data.disk->src); if (!safe_path) { virReportOOMError(conn); return -1; } ret = virAsprintf(&cmd, "pci_add %s storage file=%s,if=%s", (tryOldSyntax ? "0": "pci_addr=auto"), safe_path, type); VIR_FREE(safe_path); if (ret == -1) { virReportOOMError(conn); return ret; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("cannot attach %s disk"), type); VIR_FREE(cmd); return -1; } VIR_FREE(cmd); if (qemudParsePciAddReply(vm, reply, &domain, &bus, &slot) < 0) { if (!tryOldSyntax && strstr(reply, "invalid char in expression")) { VIR_FREE(reply); tryOldSyntax = 1; goto try_command; } qemudReportError (conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("adding %s disk failed: %s"), type, reply); VIR_FREE(reply); return -1; } VIR_FREE(reply); dev->data.disk->pci_addr.domain = domain; dev->data.disk->pci_addr.bus = bus; dev->data.disk->pci_addr.slot = slot; virDomainDiskInsertPreAlloced(vm->def, dev->data.disk); return 0; } static int qemudDomainAttachUsbMassstorageDevice(virConnectPtr conn, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { int ret, i; char *safe_path; char *cmd, *reply; for (i = 0 ; i < vm->def->ndisks ; i++) { if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("target %s already exists"), dev->data.disk->dst); return -1; } } if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks+1) < 0) { virReportOOMError(conn); return -1; } safe_path = qemudEscapeMonitorArg(dev->data.disk->src); if (!safe_path) { virReportOOMError(conn); return -1; } ret = virAsprintf(&cmd, "usb_add disk:%s", safe_path); VIR_FREE(safe_path); if (ret == -1) { virReportOOMError(conn); return ret; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot attach usb disk")); VIR_FREE(cmd); return -1; } DEBUG ("%s: attach_usb reply: %s",vm->def->name, reply); /* If the command failed qemu prints: * Could not add ... */ if (strstr(reply, "Could not add ")) { qemudReportError (conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("adding usb disk failed")); VIR_FREE(reply); VIR_FREE(cmd); return -1; } virDomainDiskInsertPreAlloced(vm->def, dev->data.disk); VIR_FREE(reply); VIR_FREE(cmd); return 0; } static int qemudDomainAttachNetDevice(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, virDomainDeviceDefPtr dev, unsigned int qemuCmdFlags) { virDomainNetDefPtr net = dev->data.net; char *cmd = NULL, *reply = NULL, *remove_cmd = NULL; char *tapfd_name = NULL, *tapfd_close = NULL; int i, tapfd = -1; unsigned domain, bus, slot; if (!(qemuCmdFlags & QEMUD_CMD_FLAG_HOST_NET_ADD)) { qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("installed qemu version does not support host_net_add")); return -1; } if (net->type == VIR_DOMAIN_NET_TYPE_BRIDGE || net->type == VIR_DOMAIN_NET_TYPE_NETWORK) { if (vm->monitor_chr->type != VIR_DOMAIN_CHR_TYPE_UNIX) { qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("network device type '%s' cannot be attached: " "qemu is not using a unix socket monitor"), virDomainNetTypeToString(net->type)); return -1; } if ((tapfd = qemudNetworkIfaceConnect(conn, driver, net, qemuCmdFlags)) < 0) return -1; } if (VIR_REALLOC_N(vm->def->nets, vm->def->nnets+1) < 0) goto no_memory; if ((qemuCmdFlags & QEMUD_CMD_FLAG_NET_NAME) && qemuAssignNetNames(vm->def, net) < 0) goto no_memory; /* Choose a vlan value greater than all other values since * older versions did not store the value in the state file. */ net->vlan = vm->def->nnets; for (i = 0; i < vm->def->nnets; i++) if (vm->def->nets[i]->vlan >= net->vlan) net->vlan = vm->def->nets[i]->vlan; if (tapfd != -1) { if (virAsprintf(&tapfd_name, "fd-%s", net->hostnet_name) < 0) goto no_memory; if (virAsprintf(&tapfd_close, "closefd %s", tapfd_name) < 0) goto no_memory; if (virAsprintf(&cmd, "getfd %s", tapfd_name) < 0) goto no_memory; if (qemudMonitorCommandWithFd(vm, cmd, tapfd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("failed to pass fd to qemu with '%s'"), cmd); goto cleanup; } DEBUG("%s: getfd reply: %s", vm->def->name, reply); /* If the command isn't supported then qemu prints: * unknown command: getfd" */ if (strstr(reply, "unknown command:")) { qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("bridge/network interface attach not supported: " "qemu 'getfd' monitor command not available")); goto cleanup; } VIR_FREE(reply); VIR_FREE(cmd); } if (qemuBuildHostNetStr(conn, net, "host_net_add ", ' ', net->vlan, tapfd_name, &cmd) < 0) goto try_tapfd_close; remove_cmd = NULL; if (net->vlan >= 0 && net->hostnet_name && virAsprintf(&remove_cmd, "host_net_remove %d %s", net->vlan, net->hostnet_name) < 0) { virReportOOMError(conn); goto try_tapfd_close; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("failed to add network backend with '%s'"), cmd); goto try_tapfd_close; } DEBUG("%s: host_net_add reply: %s", vm->def->name, reply); VIR_FREE(reply); VIR_FREE(cmd); VIR_FREE(tapfd_name); VIR_FREE(tapfd_close); if (tapfd != -1) close(tapfd); tapfd = -1; if (qemuBuildNicStr(conn, net, "pci_add pci_addr=auto ", ' ', net->vlan, &cmd) < 0) goto try_remove; if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("failed to add NIC with '%s'"), cmd); goto try_remove; } if (qemudParsePciAddReply(vm, reply, &domain, &bus, &slot) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("parsing pci_add reply failed: %s"), reply); goto try_remove; } VIR_FREE(cmd); VIR_FREE(reply); VIR_FREE(remove_cmd); net->pci_addr.domain = domain; net->pci_addr.bus = bus; net->pci_addr.slot = slot; vm->def->nets[vm->def->nnets++] = net; return 0; try_remove: VIR_FREE(reply); if (!remove_cmd) VIR_WARN0(_("Unable to remove network backend\n")); else if (qemudMonitorCommand(vm, remove_cmd, &reply) < 0) VIR_WARN(_("Failed to remove network backend with '%s'\n"), remove_cmd); else VIR_DEBUG("%s: host_net_remove reply: %s\n", vm->def->name, reply); goto cleanup; try_tapfd_close: VIR_FREE(reply); if (tapfd_close) { if (qemudMonitorCommand(vm, tapfd_close, &reply) < 0) VIR_WARN(_("Failed to close tapfd with '%s'\n"), tapfd_close); else VIR_DEBUG("%s: closefd: %s\n", vm->def->name, reply); } goto cleanup; no_memory: virReportOOMError(conn); cleanup: VIR_FREE(cmd); VIR_FREE(reply); VIR_FREE(remove_cmd); VIR_FREE(tapfd_close); VIR_FREE(tapfd_name); if (tapfd != -1) close(tapfd); return -1; } static int qemudDomainAttachHostPciDevice(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { virDomainHostdevDefPtr hostdev = dev->data.hostdev; char *cmd, *reply; unsigned domain, bus, slot; pciDevice *pci; if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs+1) < 0) { virReportOOMError(conn); return -1; } pci = pciGetDevice(conn, hostdev->source.subsys.u.pci.domain, hostdev->source.subsys.u.pci.bus, hostdev->source.subsys.u.pci.slot, hostdev->source.subsys.u.pci.function); if (!dev) return -1; if ((hostdev->managed && pciDettachDevice(conn, pci) < 0) || pciResetDevice(conn, pci, driver->activePciHostdevs) < 0) { pciFreeDevice(conn, pci); return -1; } if (pciDeviceListAdd(conn, driver->activePciHostdevs, pci) < 0) { pciFreeDevice(conn, pci); return -1; } cmd = reply = NULL; if (virAsprintf(&cmd, "pci_add pci_addr=auto host host=%.2x:%.2x.%.1x", hostdev->source.subsys.u.pci.bus, hostdev->source.subsys.u.pci.slot, hostdev->source.subsys.u.pci.function) < 0) { virReportOOMError(conn); goto error; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot attach host pci device")); goto error; } if (strstr(reply, "invalid type: host")) { qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("PCI device assignment is not supported by this version of qemu")); goto error; } if (qemudParsePciAddReply(vm, reply, &domain, &bus, &slot) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("parsing pci_add reply failed: %s"), reply); goto error; } hostdev->source.subsys.u.pci.guest_addr.domain = domain; hostdev->source.subsys.u.pci.guest_addr.bus = bus; hostdev->source.subsys.u.pci.guest_addr.slot = slot; vm->def->hostdevs[vm->def->nhostdevs++] = hostdev; VIR_FREE(reply); VIR_FREE(cmd); return 0; error: pciDeviceListDel(conn, driver->activePciHostdevs, pci); VIR_FREE(reply); VIR_FREE(cmd); return -1; } static int qemudDomainAttachHostUsbDevice(virConnectPtr conn, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { int ret; char *cmd, *reply; if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs+1) < 0) { virReportOOMError(conn); return -1; } if (dev->data.hostdev->source.subsys.u.usb.vendor) { ret = virAsprintf(&cmd, "usb_add host:%.4x:%.4x", dev->data.hostdev->source.subsys.u.usb.vendor, dev->data.hostdev->source.subsys.u.usb.product); } else { ret = virAsprintf(&cmd, "usb_add host:%.3d.%.3d", dev->data.hostdev->source.subsys.u.usb.bus, dev->data.hostdev->source.subsys.u.usb.device); } if (ret == -1) { virReportOOMError(conn); return -1; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot attach usb device")); VIR_FREE(cmd); return -1; } DEBUG ("%s: attach_usb reply: %s", vm->def->name, reply); /* If the command failed qemu prints: * Could not add ... */ if (strstr(reply, "Could not add ")) { qemudReportError (conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("adding usb device failed")); VIR_FREE(reply); VIR_FREE(cmd); return -1; } vm->def->hostdevs[vm->def->nhostdevs++] = dev->data.hostdev; VIR_FREE(reply); VIR_FREE(cmd); return 0; } static int qemudDomainAttachHostDevice(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { virDomainHostdevDefPtr hostdev = dev->data.hostdev; if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) { qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("hostdev mode '%s' not supported"), virDomainHostdevModeTypeToString(hostdev->mode)); return -1; } if (qemuDomainSetDeviceOwnership(conn, driver, dev, 0) < 0) return -1; switch (hostdev->source.subsys.type) { case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI: return qemudDomainAttachHostPciDevice(conn, driver, vm, dev); case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB: return qemudDomainAttachHostUsbDevice(conn, vm, dev); default: qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("hostdev subsys type '%s' not supported"), virDomainHostdevSubsysTypeToString(hostdev->source.subsys.type)); return -1; } } static int qemudDomainAttachDevice(virDomainPtr dom, const char *xml) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virDomainDeviceDefPtr dev = NULL; unsigned int qemuCmdFlags; virCgroupPtr cgroup = NULL; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("cannot attach device on inactive domain")); goto cleanup; } dev = virDomainDeviceDefParse(dom->conn, driver->caps, vm->def, xml, VIR_DOMAIN_XML_INACTIVE); if (dev == NULL) goto cleanup; if (qemudExtractVersionInfo(vm->def->emulator, NULL, &qemuCmdFlags) < 0) goto cleanup; if (dev->type == VIR_DOMAIN_DEVICE_DISK) { if (qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) { if (virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 0) !=0 ) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Unable to find cgroup for %s\n"), vm->def->name); goto cleanup; } if (dev->data.disk->src != NULL && dev->data.disk->type == VIR_DOMAIN_DISK_TYPE_BLOCK && virCgroupAllowDevicePath(cgroup, dev->data.disk->src) < 0) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("unable to allow device %s"), dev->data.disk->src); goto cleanup; } } if (driver->securityDriver) driver->securityDriver->domainSetSecurityImageLabel(dom->conn, vm, dev->data.disk); switch (dev->data.disk->device) { case VIR_DOMAIN_DISK_DEVICE_CDROM: case VIR_DOMAIN_DISK_DEVICE_FLOPPY: if (driver->securityDriver) driver->securityDriver->domainSetSecurityImageLabel(dom->conn, vm, dev->data.disk); if (qemuDomainSetDeviceOwnership(dom->conn, driver, dev, 0) < 0) goto cleanup; ret = qemudDomainChangeEjectableMedia(dom->conn, vm, dev, qemuCmdFlags); break; case VIR_DOMAIN_DISK_DEVICE_DISK: if (driver->securityDriver) driver->securityDriver->domainSetSecurityImageLabel(dom->conn, vm, dev->data.disk); if (qemuDomainSetDeviceOwnership(dom->conn, driver, dev, 0) < 0) goto cleanup; if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_USB) { ret = qemudDomainAttachUsbMassstorageDevice(dom->conn, vm, dev); } else if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_SCSI || dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO) { ret = qemudDomainAttachPciDiskDevice(dom->conn, vm, dev); } else { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("disk bus '%s' cannot be hotplugged."), virDomainDiskBusTypeToString(dev->data.disk->bus)); /* fallthrough */ } break; default: qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("disk device type '%s' cannot be hotplugged"), virDomainDiskDeviceTypeToString(dev->data.disk->device)); /* Fallthrough */ } if (ret != 0) { virCgroupDenyDevicePath(cgroup, dev->data.disk->src); } } else if (dev->type == VIR_DOMAIN_DEVICE_NET) { ret = qemudDomainAttachNetDevice(dom->conn, driver, vm, dev, qemuCmdFlags); } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) { ret = qemudDomainAttachHostDevice(dom->conn, driver, vm, dev); } else { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("device type '%s' cannot be attached"), virDomainDeviceTypeToString(dev->type)); goto cleanup; } if (!ret && virDomainSaveStatus(dom->conn, driver->stateDir, vm) < 0) ret = -1; cleanup: if (cgroup) virCgroupFree(&cgroup); if (ret < 0) { if (qemuDomainSetDeviceOwnership(dom->conn, driver, dev, 1) < 0) VIR_WARN0("Fail to restore disk device ownership"); virDomainDeviceDefFree(dev); } if (vm) virDomainObjUnlock(vm); qemuDriverUnlock(driver); return ret; } static int qemudDomainDetachPciDiskDevice(virConnectPtr conn, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { int i, ret = -1; char *cmd = NULL; char *reply = NULL; virDomainDiskDefPtr detach = NULL; int tryOldSyntax = 0; for (i = 0 ; i < vm->def->ndisks ; i++) { if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) { detach = vm->def->disks[i]; break; } } if (!detach) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("disk %s not found"), dev->data.disk->dst); goto cleanup; } if (!virDiskHasValidPciAddr(detach)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("disk %s cannot be detached - no PCI address for device"), detach->dst); goto cleanup; } try_command: if (tryOldSyntax) { if (virAsprintf(&cmd, "pci_del 0 %.2x", detach->pci_addr.slot) < 0) { virReportOOMError(conn); goto cleanup; } } else { if (virAsprintf(&cmd, "pci_del pci_addr=%.4x:%.2x:%.2x", detach->pci_addr.domain, detach->pci_addr.bus, detach->pci_addr.slot) < 0) { virReportOOMError(conn); goto cleanup; } } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("failed to execute detach disk %s command"), detach->dst); goto cleanup; } DEBUG ("%s: pci_del reply: %s",vm->def->name, reply); if (!tryOldSyntax && strstr(reply, "extraneous characters")) { tryOldSyntax = 1; goto try_command; } /* If the command fails due to a wrong slot qemu prints: invalid slot, * nothing is printed on success */ if (strstr(reply, "invalid slot") || strstr(reply, "Invalid pci address")) { qemudReportError (conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("failed to detach disk %s: invalid PCI address %.4x:%.2x:%.2x: %s"), detach->dst, detach->pci_addr.domain, detach->pci_addr.bus, detach->pci_addr.slot, reply); goto cleanup; } if (vm->def->ndisks > 1) { memmove(vm->def->disks + i, vm->def->disks + i + 1, sizeof(*vm->def->disks) * (vm->def->ndisks - (i + 1))); vm->def->ndisks--; if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks) < 0) { /* ignore, harmless */ } } else { VIR_FREE(vm->def->disks[0]); vm->def->ndisks = 0; } virDomainDiskDefFree(detach); ret = 0; cleanup: VIR_FREE(reply); VIR_FREE(cmd); return ret; } static int qemudDomainDetachNetDevice(virConnectPtr conn, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { int i, ret = -1; char *cmd = NULL; char *reply = NULL; virDomainNetDefPtr detach = NULL; for (i = 0 ; i < vm->def->nnets ; i++) { virDomainNetDefPtr net = vm->def->nets[i]; if (!memcmp(net->mac, dev->data.net->mac, sizeof(net->mac))) { detach = net; break; } } if (!detach) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("network device %02x:%02x:%02x:%02x:%02x:%02x not found"), dev->data.net->mac[0], dev->data.net->mac[1], dev->data.net->mac[2], dev->data.net->mac[3], dev->data.net->mac[4], dev->data.net->mac[5]); goto cleanup; } if (!virNetHasValidPciAddr(detach) || detach->vlan < 0 || !detach->hostnet_name) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("network device cannot be detached - device state missing")); goto cleanup; } if (virAsprintf(&cmd, "pci_del pci_addr=%.4x:%.2x:%.2x", detach->pci_addr.domain, detach->pci_addr.bus, detach->pci_addr.slot) < 0) { virReportOOMError(conn); goto cleanup; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("network device dettach command '%s' failed"), cmd); goto cleanup; } DEBUG("%s: pci_del reply: %s", vm->def->name, reply); /* If the command fails due to a wrong PCI address qemu prints * 'invalid pci address'; nothing is printed on success */ if (strstr(reply, "Invalid pci address")) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("failed to detach network device: invalid PCI address %.4x:%.2x:%.2x: %s"), detach->pci_addr.domain, detach->pci_addr.bus, detach->pci_addr.slot, reply); goto cleanup; } VIR_FREE(reply); VIR_FREE(cmd); if (virAsprintf(&cmd, "host_net_remove %d %s", detach->vlan, detach->hostnet_name) < 0) { virReportOOMError(conn); goto cleanup; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("network device dettach command '%s' failed"), cmd); goto cleanup; } DEBUG("%s: host_net_remove reply: %s", vm->def->name, reply); if (vm->def->nnets > 1) { memmove(vm->def->nets + i, vm->def->nets + i + 1, sizeof(*vm->def->nets) * (vm->def->nnets - (i + 1))); vm->def->nnets--; if (VIR_REALLOC_N(vm->def->nets, vm->def->nnets) < 0) { /* ignore, harmless */ } } else { VIR_FREE(vm->def->nets[0]); vm->def->nnets = 0; } virDomainNetDefFree(detach); ret = 0; cleanup: VIR_FREE(reply); VIR_FREE(cmd); return ret; } static int qemudDomainDetachHostPciDevice(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { virDomainHostdevDefPtr detach; char *cmd, *reply; int i, ret; pciDevice *pci; for (i = 0 ; i < vm->def->nhostdevs ; i++) { unsigned domain = vm->def->hostdevs[i]->source.subsys.u.pci.domain; unsigned bus = vm->def->hostdevs[i]->source.subsys.u.pci.bus; unsigned slot = vm->def->hostdevs[i]->source.subsys.u.pci.slot; unsigned function = vm->def->hostdevs[i]->source.subsys.u.pci.function; if (dev->data.hostdev->source.subsys.u.pci.domain == domain && dev->data.hostdev->source.subsys.u.pci.bus == bus && dev->data.hostdev->source.subsys.u.pci.slot == slot && dev->data.hostdev->source.subsys.u.pci.function == function) { detach = vm->def->hostdevs[i]; break; } } if (!detach) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("host pci device %.4x:%.2x:%.2x.%.1x not found"), dev->data.hostdev->source.subsys.u.pci.domain, dev->data.hostdev->source.subsys.u.pci.bus, dev->data.hostdev->source.subsys.u.pci.slot, dev->data.hostdev->source.subsys.u.pci.function); return -1; } if (!virHostdevHasValidGuestAddr(detach)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("hostdev cannot be detached - device state missing")); return -1; } if (virAsprintf(&cmd, "pci_del pci_addr=%.4x:%.2x:%.2x", detach->source.subsys.u.pci.guest_addr.domain, detach->source.subsys.u.pci.guest_addr.bus, detach->source.subsys.u.pci.guest_addr.slot) < 0) { virReportOOMError(conn); return -1; } if (qemudMonitorCommand(vm, cmd, &reply) < 0) { qemudReportError(conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot detach host pci device")); VIR_FREE(cmd); return -1; } DEBUG("%s: pci_del reply: %s", vm->def->name, reply); /* If the command fails due to a wrong PCI address qemu prints * 'invalid pci address'; nothing is printed on success */ if (strstr(reply, "Invalid pci address")) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("failed to detach host pci device: invalid PCI address %.4x:%.2x:%.2x: %s"), detach->source.subsys.u.pci.guest_addr.domain, detach->source.subsys.u.pci.guest_addr.bus, detach->source.subsys.u.pci.guest_addr.slot, reply); VIR_FREE(reply); VIR_FREE(cmd); return -1; } VIR_FREE(reply); VIR_FREE(cmd); ret = 0; pci = pciGetDevice(conn, detach->source.subsys.u.pci.domain, detach->source.subsys.u.pci.bus, detach->source.subsys.u.pci.slot, detach->source.subsys.u.pci.function); if (!pci) ret = -1; else { pciDeviceListDel(conn, driver->activePciHostdevs, pci); if (pciResetDevice(conn, pci, driver->activePciHostdevs) < 0) ret = -1; if (detach->managed && pciReAttachDevice(conn, pci) < 0) ret = -1; pciFreeDevice(conn, pci); } if (i != --vm->def->nhostdevs) memmove(&vm->def->hostdevs[i], &vm->def->hostdevs[i+1], sizeof(*vm->def->hostdevs) * (vm->def->nhostdevs-i)); if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs) < 0) { virReportOOMError(conn); ret = -1; } return ret; } static int qemudDomainDetachHostDevice(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, virDomainDeviceDefPtr dev) { virDomainHostdevDefPtr hostdev = dev->data.hostdev; int ret; if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) { qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("hostdev mode '%s' not supported"), virDomainHostdevModeTypeToString(hostdev->mode)); return -1; } switch (hostdev->source.subsys.type) { case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI: ret = qemudDomainDetachHostPciDevice(conn, driver, vm, dev); break; default: qemudReportError(conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("hostdev subsys type '%s' not supported"), virDomainHostdevSubsysTypeToString(hostdev->source.subsys.type)); return -1; } if (qemuDomainSetDeviceOwnership(conn, driver, dev, 1) < 0) VIR_WARN0("Fail to restore disk device ownership"); return ret; } static int qemudDomainDetachDevice(virDomainPtr dom, const char *xml) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virDomainDeviceDefPtr dev = NULL; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("cannot detach device on inactive domain")); goto cleanup; } dev = virDomainDeviceDefParse(dom->conn, driver->caps, vm->def, xml, VIR_DOMAIN_XML_INACTIVE); if (dev == NULL) goto cleanup; if (dev->type == VIR_DOMAIN_DEVICE_DISK && dev->data.disk->device == VIR_DOMAIN_DISK_DEVICE_DISK && (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_SCSI || dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO)) { ret = qemudDomainDetachPciDiskDevice(dom->conn, vm, dev); if (driver->securityDriver) driver->securityDriver->domainRestoreSecurityImageLabel(dom->conn, dev->data.disk); if (qemuDomainSetDeviceOwnership(dom->conn, driver, dev, 1) < 0) VIR_WARN0("Fail to restore disk device ownership"); } else if (dev->type == VIR_DOMAIN_DEVICE_NET) { ret = qemudDomainDetachNetDevice(dom->conn, vm, dev); } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) { ret = qemudDomainDetachHostDevice(dom->conn, driver, vm, dev); } else qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("only SCSI or virtio disk device can be detached dynamically")); if (!ret && virDomainSaveStatus(dom->conn, driver->stateDir, vm) < 0) ret = -1; cleanup: virDomainDeviceDefFree(dev); if (vm) virDomainObjUnlock(vm); qemuDriverUnlock(driver); return ret; } static int qemudDomainGetAutostart(virDomainPtr dom, int *autostart) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } *autostart = vm->autostart; ret = 0; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainSetAutostart(virDomainPtr dom, int autostart) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char *configFile = NULL, *autostartLink = NULL; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!vm->persistent) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot set autostart for transient domain")); goto cleanup; } autostart = (autostart != 0); if (vm->autostart != autostart) { if ((configFile = virDomainConfigFile(dom->conn, driver->configDir, vm->def->name)) == NULL) goto cleanup; if ((autostartLink = virDomainConfigFile(dom->conn, driver->autostartDir, vm->def->name)) == NULL) goto cleanup; if (autostart) { int err; if ((err = virFileMakePath(driver->autostartDir))) { virReportSystemError(dom->conn, err, _("cannot create autostart directory %s"), driver->autostartDir); goto cleanup; } if (symlink(configFile, autostartLink) < 0) { virReportSystemError(dom->conn, errno, _("Failed to create symlink '%s to '%s'"), autostartLink, configFile); goto cleanup; } } else { if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) { virReportSystemError(dom->conn, errno, _("Failed to delete symlink '%s'"), autostartLink); goto cleanup; } } vm->autostart = autostart; } ret = 0; cleanup: VIR_FREE(configFile); VIR_FREE(autostartLink); if (vm) virDomainObjUnlock(vm); qemuDriverUnlock(driver); return ret; } static char *qemuGetSchedulerType(virDomainPtr dom, int *nparams) { struct qemud_driver *driver = dom->conn->privateData; char *ret; if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, __FUNCTION__); return NULL; } if (nparams) *nparams = 1; ret = strdup("posix"); if (!ret) virReportOOMError(dom->conn); return ret; } static int qemuSetSchedulerParameters(virDomainPtr dom, virSchedParameterPtr params, int nparams) { struct qemud_driver *driver = dom->conn->privateData; int i; virCgroupPtr group = NULL; virDomainObjPtr vm = NULL; int ret = -1; if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, __FUNCTION__); return -1; } qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (vm == NULL) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("No such domain %s"), dom->uuid); goto cleanup; } if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("cannot find cgroup for domain %s"), vm->def->name); goto cleanup; } for (i = 0; i < nparams; i++) { virSchedParameterPtr param = ¶ms[i]; if (STREQ(param->field, "cpu_shares")) { int rc; if (param->type != VIR_DOMAIN_SCHED_FIELD_ULLONG) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("invalid type for cpu_shares tunable, expected a 'ullong'")); goto cleanup; } rc = virCgroupSetCpuShares(group, params[i].value.ul); if (rc != 0) { virReportSystemError(dom->conn, -rc, "%s", _("unable to set cpu shares tunable")); goto cleanup; } } else { qemudReportError(dom->conn, domain, NULL, VIR_ERR_INVALID_ARG, _("Invalid parameter `%s'"), param->field); goto cleanup; } } ret = 0; cleanup: virCgroupFree(&group); if (vm) virDomainObjUnlock(vm); return ret; } static int qemuGetSchedulerParameters(virDomainPtr dom, virSchedParameterPtr params, int *nparams) { struct qemud_driver *driver = dom->conn->privateData; virCgroupPtr group = NULL; virDomainObjPtr vm = NULL; unsigned long long val; int ret = -1; int rc; if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, __FUNCTION__); return -1; } if ((*nparams) != 1) { qemudReportError(dom->conn, domain, NULL, VIR_ERR_INVALID_ARG, "%s", _("Invalid parameter count")); return -1; } qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (vm == NULL) { qemudReportError(dom->conn, domain, NULL, VIR_ERR_INTERNAL_ERROR, _("No such domain %s"), dom->uuid); goto cleanup; } if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("cannot find cgroup for domain %s"), vm->def->name); goto cleanup; } rc = virCgroupGetCpuShares(group, &val); if (rc != 0) { virReportSystemError(dom->conn, -rc, "%s", _("unable to get cpu shares tunable")); goto cleanup; } params[0].value.ul = val; strncpy(params[0].field, "cpu_shares", sizeof(params[0].field)); params[0].type = VIR_DOMAIN_SCHED_FIELD_ULLONG; ret = 0; cleanup: virCgroupFree(&group); if (vm) virDomainObjUnlock(vm); return ret; } /* This uses the 'info blockstats' monitor command which was * integrated into both qemu & kvm in late 2007. If the command is * not supported we detect this and return the appropriate error. */ static int qemudDomainBlockStats (virDomainPtr dom, const char *path, struct _virDomainBlockStats *stats) { struct qemud_driver *driver = dom->conn->privateData; char *dummy, *info = NULL; const char *p, *eol; const char *qemu_dev_name = NULL; size_t len; int i, ret = -1; virDomainObjPtr vm; virDomainDiskDefPtr disk = NULL; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive (vm)) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } for (i = 0 ; i < vm->def->ndisks ; i++) { if (STREQ(path, vm->def->disks[i]->dst)) { disk = vm->def->disks[i]; break; } } if (!disk) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("invalid path: %s"), path); goto cleanup; } qemu_dev_name = qemudDiskDeviceName(dom->conn, disk); if (!qemu_dev_name) goto cleanup; len = strlen (qemu_dev_name); if (qemudMonitorCommand (vm, "info blockstats", &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("'info blockstats' command failed")); goto cleanup; } DEBUG ("%s: info blockstats reply: %s", vm->def->name, info); /* If the command isn't supported then qemu prints the supported * info commands, so the output starts "info ". Since this is * unlikely to be the name of a block device, we can use this * to detect if qemu supports the command. */ if (strstr(info, "\ninfo ")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("'info blockstats' not supported by this qemu")); goto cleanup; } stats->rd_req = -1; stats->rd_bytes = -1; stats->wr_req = -1; stats->wr_bytes = -1; stats->errs = -1; /* The output format for both qemu & KVM is: * blockdevice: rd_bytes=% wr_bytes=% rd_operations=% wr_operations=% * (repeated for each block device) * where '%' is a 64 bit number. */ p = info; while (*p) { if (STREQLEN (p, qemu_dev_name, len) && p[len] == ':' && p[len+1] == ' ') { eol = strchr (p, '\n'); if (!eol) eol = p + strlen (p); p += len+2; /* Skip to first label. */ while (*p) { if (STRPREFIX (p, "rd_bytes=")) { p += 9; if (virStrToLong_ll (p, &dummy, 10, &stats->rd_bytes) == -1) DEBUG ("%s: error reading rd_bytes: %s", vm->def->name, p); } else if (STRPREFIX (p, "wr_bytes=")) { p += 9; if (virStrToLong_ll (p, &dummy, 10, &stats->wr_bytes) == -1) DEBUG ("%s: error reading wr_bytes: %s", vm->def->name, p); } else if (STRPREFIX (p, "rd_operations=")) { p += 14; if (virStrToLong_ll (p, &dummy, 10, &stats->rd_req) == -1) DEBUG ("%s: error reading rd_req: %s", vm->def->name, p); } else if (STRPREFIX (p, "wr_operations=")) { p += 14; if (virStrToLong_ll (p, &dummy, 10, &stats->wr_req) == -1) DEBUG ("%s: error reading wr_req: %s", vm->def->name, p); } else DEBUG ("%s: unknown block stat near %s", vm->def->name, p); /* Skip to next label. */ p = strchr (p, ' '); if (!p || p >= eol) break; p++; } ret = 0; goto cleanup; } /* Skip to next line. */ p = strchr (p, '\n'); if (!p) break; p++; } /* If we reach here then the device was not found. */ qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("device not found: %s (%s)"), path, qemu_dev_name); cleanup: VIR_FREE(qemu_dev_name); VIR_FREE(info); if (vm) virDomainObjUnlock(vm); return ret; } #ifdef __linux__ static int qemudDomainInterfaceStats (virDomainPtr dom, const char *path, struct _virDomainInterfaceStats *stats) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int i; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } /* Check the path is one of the domain's network interfaces. */ for (i = 0 ; i < vm->def->nnets ; i++) { if (vm->def->nets[i]->ifname && STREQ (vm->def->nets[i]->ifname, path)) { ret = 0; break; } } if (ret == 0) ret = linuxDomainInterfaceStats (dom->conn, path, stats); else qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("invalid path, '%s' is not a known interface"), path); cleanup: if (vm) virDomainObjUnlock(vm); return ret; } #else static int qemudDomainInterfaceStats (virDomainPtr dom, const char *path ATTRIBUTE_UNUSED, struct _virDomainInterfaceStats *stats ATTRIBUTE_UNUSED) qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", __FUNCTION__); return -1; } #endif static int qemudDomainBlockPeek (virDomainPtr dom, const char *path, unsigned long long offset, size_t size, void *buffer, unsigned int flags ATTRIBUTE_UNUSED) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; int fd = -1, ret = -1, i; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!path || path[0] == '\0') { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("NULL or empty path")); goto cleanup; } /* Check the path belongs to this domain. */ for (i = 0 ; i < vm->def->ndisks ; i++) { if (vm->def->disks[i]->src != NULL && STREQ (vm->def->disks[i]->src, path)) { ret = 0; break; } } if (ret == 0) { ret = -1; /* The path is correct, now try to open it and get its size. */ fd = open (path, O_RDONLY); if (fd == -1) { virReportSystemError (dom->conn, errno, _("%s: failed to open"), path); goto cleanup; } /* Seek and read. */ /* NB. Because we configure with AC_SYS_LARGEFILE, off_t should * be 64 bits on all platforms. */ if (lseek (fd, offset, SEEK_SET) == (off_t) -1 || saferead (fd, buffer, size) == (ssize_t) -1) { virReportSystemError (dom->conn, errno, _("%s: failed to seek or read"), path); goto cleanup; } ret = 0; } else { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("invalid path")); } cleanup: if (fd >= 0) close (fd); if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainMemoryPeek (virDomainPtr dom, unsigned long long offset, size_t size, void *buffer, unsigned int flags) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; char cmd[256], *info = NULL; char *tmp = NULL; int fd = -1, ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (flags != VIR_MEMORY_VIRTUAL && flags != VIR_MEMORY_PHYSICAL) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("flags parameter must be VIR_MEMORY_VIRTUAL or VIR_MEMORY_PHYSICAL")); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } if (virAsprintf(&tmp, driver->cacheDir, "/qemu.mem.XXXXXX") < 0) { virReportOOMError(dom->conn); goto cleanup; } /* Create a temporary filename. */ if ((fd = mkstemp (tmp)) == -1) { virReportSystemError (dom->conn, errno, _("mkstemp(\"%s\") failed"), tmp); goto cleanup; } if (flags == VIR_MEMORY_VIRTUAL) /* Issue the memsave command. */ snprintf (cmd, sizeof cmd, "memsave %llu %zi \"%s\"", offset, size, tmp); else /* Issue the pmemsave command. */ snprintf (cmd, sizeof cmd, "pmemsave %llu %zi \"%s\"", offset, size, tmp); if (qemudMonitorCommand (vm, cmd, &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("'memsave' command failed")); goto cleanup; } DEBUG ("%s: (p)memsave reply: %s", vm->def->name, info); /* Read the memory file into buffer. */ if (saferead (fd, buffer, size) == (ssize_t) -1) { virReportSystemError (dom->conn, errno, _("failed to read temporary file " "created with template %s"), tmp); goto cleanup; } ret = 0; cleanup: VIR_FREE(tmp); VIR_FREE(info); if (fd >= 0) close (fd); unlink (tmp); if (vm) virDomainObjUnlock(vm); return ret; } static int qemudDomainEventRegister (virConnectPtr conn, virConnectDomainEventCallback callback, void *opaque, virFreeCallback freecb) { struct qemud_driver *driver = conn->privateData; int ret; qemuDriverLock(driver); ret = virDomainEventCallbackListAdd(conn, driver->domainEventCallbacks, callback, opaque, freecb); qemuDriverUnlock(driver); return ret; } static int qemudDomainEventDeregister (virConnectPtr conn, virConnectDomainEventCallback callback) { struct qemud_driver *driver = conn->privateData; int ret; qemuDriverLock(driver); if (driver->domainEventDispatching) ret = virDomainEventCallbackListMarkDelete(conn, driver->domainEventCallbacks, callback); else ret = virDomainEventCallbackListRemove(conn, driver->domainEventCallbacks, callback); qemuDriverUnlock(driver); return ret; } static void qemuDomainEventDispatchFunc(virConnectPtr conn, virDomainEventPtr event, virConnectDomainEventCallback cb, void *cbopaque, void *opaque) { struct qemud_driver *driver = opaque; /* Drop the lock whle dispatching, for sake of re-entrancy */ qemuDriverUnlock(driver); virDomainEventDispatchDefaultFunc(conn, event, cb, cbopaque, NULL); qemuDriverLock(driver); } static void qemuDomainEventFlush(int timer ATTRIBUTE_UNUSED, void *opaque) { struct qemud_driver *driver = opaque; virDomainEventQueue tempQueue; qemuDriverLock(driver); driver->domainEventDispatching = 1; /* Copy the queue, so we're reentrant safe */ tempQueue.count = driver->domainEventQueue->count; tempQueue.events = driver->domainEventQueue->events; driver->domainEventQueue->count = 0; driver->domainEventQueue->events = NULL; virEventUpdateTimeout(driver->domainEventTimer, -1); virDomainEventQueueDispatch(&tempQueue, driver->domainEventCallbacks, qemuDomainEventDispatchFunc, driver); /* Purge any deleted callbacks */ virDomainEventCallbackListPurgeMarked(driver->domainEventCallbacks); driver->domainEventDispatching = 0; qemuDriverUnlock(driver); } /* driver must be locked before calling */ static void qemuDomainEventQueue(struct qemud_driver *driver, virDomainEventPtr event) { if (virDomainEventQueuePush(driver->domainEventQueue, event) < 0) virDomainEventFree(event); if (qemu_driver->domainEventQueue->count == 1) virEventUpdateTimeout(driver->domainEventTimer, 0); } /* Migration support. */ /* Prepare is the first step, and it runs on the destination host. * * This starts an empty VM listening on a TCP port. */ static int qemudDomainMigratePrepare2 (virConnectPtr dconn, char **cookie ATTRIBUTE_UNUSED, int *cookielen ATTRIBUTE_UNUSED, const char *uri_in, char **uri_out, unsigned long flags ATTRIBUTE_UNUSED, const char *dname, unsigned long resource ATTRIBUTE_UNUSED, const char *dom_xml) { static int port = 0; struct qemud_driver *driver = dconn->privateData; virDomainDefPtr def = NULL; virDomainObjPtr vm = NULL; int this_port; char *hostname; char migrateFrom [64]; const char *p; virDomainEventPtr event = NULL; int ret = -1; int internalret; *uri_out = NULL; qemuDriverLock(driver); if (!dom_xml) { qemudReportError (dconn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("no domain XML passed")); goto cleanup; } /* The URI passed in may be NULL or a string "tcp://somehostname:port". * * If the URI passed in is NULL then we allocate a port number * from our pool of port numbers and return a URI of * "tcp://ourhostname:port". * * If the URI passed in is not NULL then we try to parse out the * port number and use that (note that the hostname is assumed * to be a correct hostname which refers to the target machine). */ if (uri_in == NULL) { this_port = QEMUD_MIGRATION_FIRST_PORT + port++; if (port == QEMUD_MIGRATION_NUM_PORTS) port = 0; /* Get hostname */ if ((hostname = virGetHostname()) == NULL) { virReportSystemError (dconn, errno, "%s", _("failed to determine host name")); goto cleanup; } /* Caller frees */ internalret = virAsprintf(uri_out, "tcp:%s:%d", hostname, this_port); VIR_FREE(hostname); if (internalret < 0) { virReportOOMError (dconn); goto cleanup; } } else { /* Check the URI starts with "tcp:". We will escape the * URI when passing it to the qemu monitor, so bad * characters in hostname part don't matter. */ if (!STRPREFIX (uri_in, "tcp:")) { qemudReportError (dconn, NULL, NULL, VIR_ERR_INVALID_ARG, "%s", _("only tcp URIs are supported for KVM/QEMU migrations")); goto cleanup; } /* Get the port number. */ p = strrchr (uri_in, ':'); p++; /* definitely has a ':' in it, see above */ this_port = virParseNumber (&p); if (this_port == -1 || p-uri_in != strlen (uri_in)) { qemudReportError (dconn, NULL, NULL, VIR_ERR_INVALID_ARG, "%s", _("URI did not have ':port' at the end")); goto cleanup; } } /* Parse the domain XML. */ if (!(def = virDomainDefParseString(dconn, driver->caps, dom_xml, VIR_DOMAIN_XML_INACTIVE))) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to parse XML")); goto cleanup; } /* Target domain name, maybe renamed. */ dname = dname ? dname : def->name; #if 1 /* Ensure the name and UUID don't already exist in an active VM */ vm = virDomainFindByUUID(&driver->domains, def->uuid); #else /* For TESTING ONLY you can change #if 1 -> #if 0 above and use * this code which lets you do localhost migrations. You must still * supply a fresh 'dname' but this code assigns a random UUID. */ if (virUUIDGenerate (def->uuid) == -1) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("could not generate random UUID")); goto cleanup; } #endif if (!vm) vm = virDomainFindByName(&driver->domains, dname); if (vm) { if (virDomainIsActive(vm)) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain with the same name or UUID already exists as '%s'"), vm->def->name); goto cleanup; } virDomainObjUnlock(vm); } if (!(vm = virDomainAssignDef(dconn, &driver->domains, def))) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to assign new VM")); goto cleanup; } def = NULL; /* Domain starts inactive, even if the domain XML had an id field. */ vm->def->id = -1; /* Start the QEMU daemon, with the same command-line arguments plus * -incoming tcp:0.0.0.0:port */ snprintf (migrateFrom, sizeof (migrateFrom), "tcp:0.0.0.0:%d", this_port); if (qemudStartVMDaemon (dconn, driver, vm, migrateFrom, -1) < 0) { /* Note that we don't set an error here because qemudStartVMDaemon * should have already done that. */ if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } goto cleanup; } event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_MIGRATED); ret = 0; cleanup: virDomainDefFree(def); if (ret != 0) { VIR_FREE(*uri_out); } if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } /* Perform is the second step, and it runs on the source host. */ static int qemudDomainMigratePerform (virDomainPtr dom, const char *cookie ATTRIBUTE_UNUSED, int cookielen ATTRIBUTE_UNUSED, const char *uri, unsigned long flags, const char *dname ATTRIBUTE_UNUSED, unsigned long resource) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virDomainEventPtr event = NULL; char *safe_uri; char cmd[HOST_NAME_MAX+50]; char *info = NULL; int ret = -1; int paused = 0; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (!virDomainIsActive(vm)) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_INVALID, "%s", _("domain is not running")); goto cleanup; } if (!(flags & VIR_MIGRATE_LIVE)) { /* Pause domain for non-live migration */ if (qemudMonitorCommand (vm, "stop", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("off-line migration specified, but suspend operation failed")); goto cleanup; } DEBUG ("%s: stop reply: %s", vm->def->name, info); VIR_FREE(info); paused = 1; event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_SUSPENDED, VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED); if (event) qemuDomainEventQueue(driver, event); event = NULL; } if (resource > 0) { /* Issue migrate_set_speed command. Don't worry if it fails. */ snprintf (cmd, sizeof cmd, "migrate_set_speed %lum", resource); qemudMonitorCommand (vm, cmd, &info); DEBUG ("%s: migrate_set_speed reply: %s", vm->def->name, info); VIR_FREE (info); } /* Issue the migrate command. */ safe_uri = qemudEscapeMonitorArg (uri); if (!safe_uri) { virReportOOMError (dom->conn); goto cleanup; } snprintf (cmd, sizeof cmd, "migrate \"%s\"", safe_uri); VIR_FREE (safe_uri); if (qemudMonitorCommand (vm, cmd, &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("migrate operation failed")); goto cleanup; } DEBUG ("%s: migrate reply: %s", vm->def->name, info); /* Now check for "fail" in the output string */ if (strstr(info, "fail") != NULL) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("migrate failed: %s"), info); goto cleanup; } /* it is also possible that the migrate didn't fail initially, but * rather failed later on. Check the output of "info migrate" */ VIR_FREE(info); if (qemudMonitorCommand(vm, "info migrate", &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("could not get info about migration")); goto cleanup; } if (strstr(info, "fail") != NULL) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("migrate failed: %s"), info); goto cleanup; } /* Clean up the source domain. */ qemudShutdownVMDaemon (dom->conn, driver, vm); paused = 0; event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_MIGRATED); if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } ret = 0; cleanup: /* Note that we have to free info *first*, since we are re-using the * variable below (and otherwise might cause a memory leak) */ VIR_FREE(info); if (paused) { /* we got here through some sort of failure; start the domain again */ if (qemudMonitorCommand (vm, "cont", &info) < 0) { /* Hm, we already know we are in error here. We don't want to * overwrite the previous error, though, so we just throw something * to the logs and hope for the best */ VIR_ERROR(_("Failed to resume guest %s after failure\n"), vm->def->name); } else { DEBUG ("%s: cont reply: %s", vm->def->name, info); VIR_FREE(info); } event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_RESUMED, VIR_DOMAIN_EVENT_RESUMED_MIGRATED); } if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return ret; } /* Finish is the third and final step, and it runs on the destination host. */ static virDomainPtr qemudDomainMigrateFinish2 (virConnectPtr dconn, const char *dname, const char *cookie ATTRIBUTE_UNUSED, int cookielen ATTRIBUTE_UNUSED, const char *uri ATTRIBUTE_UNUSED, unsigned long flags ATTRIBUTE_UNUSED, int retcode) { struct qemud_driver *driver = dconn->privateData; virDomainObjPtr vm; virDomainPtr dom = NULL; virDomainEventPtr event = NULL; char *info = NULL; qemuDriverLock(driver); vm = virDomainFindByName(&driver->domains, dname); if (!vm) { qemudReportError (dconn, NULL, NULL, VIR_ERR_NO_DOMAIN, _("no domain with matching name '%s'"), dname); goto cleanup; } /* Did the migration go as planned? If yes, return the domain * object, but if no, clean up the empty qemu process. */ if (retcode == 0) { dom = virGetDomain (dconn, vm->def->name, vm->def->uuid); /* run 'cont' on the destination, which allows migration on qemu * >= 0.10.6 to work properly. This isn't strictly necessary on * older qemu's, but it also doesn't hurt anything there */ if (qemudMonitorCommand(vm, "cont", &info) < 0) { qemudReportError(dconn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("resume operation failed")); goto cleanup; } VIR_FREE(info); vm->state = VIR_DOMAIN_RUNNING; event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_RESUMED, VIR_DOMAIN_EVENT_RESUMED_MIGRATED); virDomainSaveStatus(dconn, driver->stateDir, vm); } else { qemudShutdownVMDaemon (dconn, driver, vm); event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_FAILED); if (!vm->persistent) { virDomainRemoveInactive(&driver->domains, vm); vm = NULL; } } cleanup: if (vm) virDomainObjUnlock(vm); if (event) qemuDomainEventQueue(driver, event); qemuDriverUnlock(driver); return dom; } static int qemudNodeDeviceGetPciInfo (virNodeDevicePtr dev, unsigned *domain, unsigned *bus, unsigned *slot, unsigned *function) { virNodeDeviceDefPtr def = NULL; virNodeDevCapsDefPtr cap; char *xml = NULL; int ret = -1; xml = virNodeDeviceGetXMLDesc(dev, 0); if (!xml) goto out; def = virNodeDeviceDefParseString(dev->conn, xml, EXISTING_DEVICE); if (!def) goto out; cap = def->caps; while (cap) { if (cap->type == VIR_NODE_DEV_CAP_PCI_DEV) { *domain = cap->data.pci_dev.domain; *bus = cap->data.pci_dev.bus; *slot = cap->data.pci_dev.slot; *function = cap->data.pci_dev.function; break; } cap = cap->next; } if (!cap) { qemudReportError(dev->conn, NULL, NULL, VIR_ERR_INVALID_ARG, _("device %s is not a PCI device"), dev->name); goto out; } ret = 0; out: virNodeDeviceDefFree(def); VIR_FREE(xml); return ret; } static int qemudNodeDeviceDettach (virNodeDevicePtr dev) { pciDevice *pci; unsigned domain, bus, slot, function; int ret = -1; if (qemudNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0) return -1; pci = pciGetDevice(dev->conn, domain, bus, slot, function); if (!pci) return -1; if (pciDettachDevice(dev->conn, pci) < 0) goto out; ret = 0; out: pciFreeDevice(dev->conn, pci); return ret; } static int qemudNodeDeviceReAttach (virNodeDevicePtr dev) { pciDevice *pci; unsigned domain, bus, slot, function; int ret = -1; if (qemudNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0) return -1; pci = pciGetDevice(dev->conn, domain, bus, slot, function); if (!pci) return -1; if (pciReAttachDevice(dev->conn, pci) < 0) goto out; ret = 0; out: pciFreeDevice(dev->conn, pci); return ret; } static int qemudNodeDeviceReset (virNodeDevicePtr dev) { struct qemud_driver *driver = dev->conn->privateData; pciDevice *pci; unsigned domain, bus, slot, function; int ret = -1; if (qemudNodeDeviceGetPciInfo(dev, &domain, &bus, &slot, &function) < 0) return -1; pci = pciGetDevice(dev->conn, domain, bus, slot, function); if (!pci) return -1; qemuDriverLock(driver); if (pciResetDevice(dev->conn, pci, driver->activePciHostdevs) < 0) goto out; ret = 0; out: qemuDriverUnlock(driver); pciFreeDevice(dev->conn, pci); return ret; } static virDriver qemuDriver = { VIR_DRV_QEMU, "QEMU", qemudOpen, /* open */ qemudClose, /* close */ qemudSupportsFeature, /* supports_feature */ qemudGetType, /* type */ qemudGetVersion, /* version */ qemudGetHostname, /* getHostname */ qemudGetMaxVCPUs, /* getMaxVcpus */ nodeGetInfo, /* nodeGetInfo */ qemudGetCapabilities, /* getCapabilities */ qemudListDomains, /* listDomains */ qemudNumDomains, /* numOfDomains */ qemudDomainCreate, /* domainCreateXML */ qemudDomainLookupByID, /* domainLookupByID */ qemudDomainLookupByUUID, /* domainLookupByUUID */ qemudDomainLookupByName, /* domainLookupByName */ qemudDomainSuspend, /* domainSuspend */ qemudDomainResume, /* domainResume */ qemudDomainShutdown, /* domainShutdown */ NULL, /* domainReboot */ qemudDomainDestroy, /* domainDestroy */ qemudDomainGetOSType, /* domainGetOSType */ qemudDomainGetMaxMemory, /* domainGetMaxMemory */ qemudDomainSetMaxMemory, /* domainSetMaxMemory */ qemudDomainSetMemory, /* domainSetMemory */ qemudDomainGetInfo, /* domainGetInfo */ qemudDomainSave, /* domainSave */ qemudDomainRestore, /* domainRestore */ qemudDomainCoreDump, /* domainCoreDump */ qemudDomainSetVcpus, /* domainSetVcpus */ #if HAVE_SCHED_GETAFFINITY qemudDomainPinVcpu, /* domainPinVcpu */ qemudDomainGetVcpus, /* domainGetVcpus */ #else NULL, /* domainPinVcpu */ NULL, /* domainGetVcpus */ #endif qemudDomainGetMaxVcpus, /* domainGetMaxVcpus */ qemudDomainGetSecurityLabel, /* domainGetSecurityLabel */ qemudNodeGetSecurityModel, /* nodeGetSecurityModel */ qemudDomainDumpXML, /* domainDumpXML */ qemuDomainXMLFromNative, /* domainXmlFromNative */ qemuDomainXMLToNative, /* domainXMLToNative */ qemudListDefinedDomains, /* listDefinedDomains */ qemudNumDefinedDomains, /* numOfDefinedDomains */ qemudDomainStart, /* domainCreate */ qemudDomainDefine, /* domainDefineXML */ qemudDomainUndefine, /* domainUndefine */ qemudDomainAttachDevice, /* domainAttachDevice */ qemudDomainDetachDevice, /* domainDetachDevice */ qemudDomainGetAutostart, /* domainGetAutostart */ qemudDomainSetAutostart, /* domainSetAutostart */ qemuGetSchedulerType, /* domainGetSchedulerType */ qemuGetSchedulerParameters, /* domainGetSchedulerParameters */ qemuSetSchedulerParameters, /* domainSetSchedulerParameters */ NULL, /* domainMigratePrepare (v1) */ qemudDomainMigratePerform, /* domainMigratePerform */ NULL, /* domainMigrateFinish */ qemudDomainBlockStats, /* domainBlockStats */ qemudDomainInterfaceStats, /* domainInterfaceStats */ qemudDomainBlockPeek, /* domainBlockPeek */ qemudDomainMemoryPeek, /* domainMemoryPeek */ nodeGetCellsFreeMemory, /* nodeGetCellsFreeMemory */ nodeGetFreeMemory, /* getFreeMemory */ qemudDomainEventRegister, /* domainEventRegister */ qemudDomainEventDeregister, /* domainEventDeregister */ qemudDomainMigratePrepare2, /* domainMigratePrepare2 */ qemudDomainMigrateFinish2, /* domainMigrateFinish2 */ qemudNodeDeviceDettach, /* nodeDeviceDettach */ qemudNodeDeviceReAttach, /* nodeDeviceReAttach */ qemudNodeDeviceReset, /* nodeDeviceReset */ }; static virStateDriver qemuStateDriver = { .initialize = qemudStartup, .cleanup = qemudShutdown, .reload = qemudReload, .active = qemudActive, }; int qemuRegister(void) { virRegisterDriver(&qemuDriver); virRegisterStateDriver(&qemuStateDriver); return 0; }