/* * driver.c: core driver methods for managing qemu guests * * Copyright (C) 2006, 2007, 2008 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_NUMACTL #include #endif #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" /* For storing short-lived temporary files. */ #define TEMPDIR LOCAL_STATE_DIR "/cache/libvirt" static int qemudShutdown(void); #define qemudLog(level, msg...) fprintf(stderr, msg) static int qemudSetCloseExec(int fd) { int flags; if ((flags = fcntl(fd, F_GETFD)) < 0) goto error; flags |= FD_CLOEXEC; if ((fcntl(fd, F_SETFD, flags)) < 0) goto error; return 0; error: qemudLog(QEMUD_ERR, "%s", _("Failed to set close-on-exec file descriptor flag\n")); return -1; } static int qemudSetNonBlock(int fd) { int flags; if ((flags = fcntl(fd, F_GETFL)) < 0) goto error; flags |= O_NONBLOCK; if ((fcntl(fd, F_SETFL, flags)) < 0) goto error; return 0; error: qemudLog(QEMUD_ERR, "%s", _("Failed to set non-blocking file descriptor flag\n")); return -1; } static void qemudDomainEventDispatch (struct qemud_driver *driver, virDomainObjPtr vm, int event, int detail); static void qemudDispatchVMEvent(int fd, int events, void *opaque); static int qemudStartVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, const char *migrateFrom); static void qemudShutdownVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm); static int qemudDomainGetMaxVcpus(virDomainPtr dom); static int qemudMonitorCommand (const struct qemud_driver *driver, const virDomainObjPtr vm, const char *cmd, char **reply); static struct qemud_driver *qemu_driver = NULL; static void qemudAutostartConfigs(struct qemud_driver *driver) { unsigned int i; for (i = 0 ; i < driver->domains.count ; i++) { virDomainObjPtr vm = driver->domains.objs[i]; if (vm->autostart && !virDomainIsActive(vm)) { int ret = qemudStartVMDaemon(NULL, driver, vm, NULL); if (ret < 0) { virErrorPtr err = virGetLastError(); qemudLog(QEMUD_ERR, _("Failed to autostart VM '%s': %s\n"), vm->def->name, err ? err->message : NULL); } else { qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_BOOTED); } } } } /** * qemudStartup: * * Initialization function for the QEmu daemon */ static int qemudStartup(void) { uid_t uid = geteuid(); struct passwd *pw; char *base = NULL; char driverConf[PATH_MAX]; if (VIR_ALLOC(qemu_driver) < 0) return -1; /* Don't have a dom0 so start from 1 */ qemu_driver->nextvmid = 1; /* Init callback list */ if(VIR_ALLOC(qemu_driver->domainEventCallbacks) < 0) return -1; if (!uid) { if (asprintf(&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; } else { if (!(pw = getpwuid(uid))) { qemudLog(QEMUD_ERR, _("Failed to find user record for uid '%d': %s\n"), uid, strerror(errno)); goto out_nouid; } if (asprintf(&qemu_driver->logDir, "%s/.libvirt/qemu/log", pw->pw_dir) == -1) goto out_of_memory; if (asprintf (&base, "%s/.libvirt", pw->pw_dir) == -1) goto out_of_memory; } /* 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 (asprintf (&qemu_driver->configDir, "%s/qemu", base) == -1) goto out_of_memory; if (asprintf (&qemu_driver->autostartDir, "%s/qemu/autostart", base) == -1) goto out_of_memory; VIR_FREE(base); if ((qemu_driver->caps = qemudCapsInit()) == NULL) goto out_of_memory; if (qemudLoadDriverConfig(qemu_driver, driverConf) < 0) { qemudShutdown(); return -1; } if (virDomainLoadAllConfigs(NULL, qemu_driver->caps, &qemu_driver->domains, qemu_driver->configDir, qemu_driver->autostartDir) < 0) { qemudShutdown(); return -1; } qemudAutostartConfigs(qemu_driver); return 0; out_of_memory: qemudLog (QEMUD_ERR, "%s", _("qemudStartup: out of memory\n")); out_nouid: VIR_FREE(base); VIR_FREE(qemu_driver); return -1; } /** * 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; virDomainLoadAllConfigs(NULL, qemu_driver->caps, &qemu_driver->domains, qemu_driver->configDir, qemu_driver->autostartDir); 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; if (!qemu_driver) return 0; for (i = 0 ; i < qemu_driver->domains.count ; i++) if (virDomainIsActive(qemu_driver->domains.objs[i])) return 1; /* Otherwise we're happy to deal with a shutdown */ return 0; } /** * qemudShutdown: * * Shutdown the QEmu daemon, it will stop all active domains and networks */ static int qemudShutdown(void) { unsigned int i; if (!qemu_driver) return -1; virCapabilitiesFree(qemu_driver->caps); /* shutdown active VMs */ for (i = 0 ; i < qemu_driver->domains.count ; i++) { virDomainObjPtr dom = qemu_driver->domains.objs[i]; if (virDomainIsActive(dom)) qemudShutdownVMDaemon(NULL, qemu_driver, dom); if (!dom->persistent) virDomainRemoveInactive(&qemu_driver->domains, dom); } virDomainObjListFree(&qemu_driver->domains); VIR_FREE(qemu_driver->logDir); VIR_FREE(qemu_driver->configDir); VIR_FREE(qemu_driver->autostartDir); VIR_FREE(qemu_driver->vncTLSx509certdir); VIR_FREE(qemu_driver->vncListen); /* Free domain callback list */ virDomainEventCallbackListFree(qemu_driver->domainEventCallbacks); if (qemu_driver->brctl) brShutdown(qemu_driver->brctl); VIR_FREE(qemu_driver); return 0; } /* Return -1 for error, 1 to continue reading and 0 for success */ typedef int qemudHandlerMonitorOutput(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, const char *output, int fd); static int qemudReadMonitorOutput(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, int fd, char *buf, int buflen, qemudHandlerMonitorOutput func, const char *what) { #define MONITOR_TIMEOUT 3000 int got = 0; buf[0] = '\0'; /* Consume & discard the initial greeting */ while (got < (buflen-1)) { int ret; ret = read(fd, buf+got, buflen-got-1); if (ret == 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("QEMU quit during %s startup\n%s"), what, buf); return -1; } if (ret < 0) { struct pollfd pfd = { .fd = fd, .events = POLLIN }; if (errno == EINTR) continue; if (errno != EAGAIN) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Failure while reading %s startup output: %s"), what, strerror(errno)); return -1; } ret = poll(&pfd, 1, MONITOR_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) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Failure while reading %s startup output: %s"), what, strerror(errno)); 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 { got += ret; buf[got] = '\0'; if ((ret = func(conn, driver, vm, buf, fd)) != 1) return ret; } } qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Out of space while reading %s startup output"), what); return -1; #undef MONITOR_TIMEOUT } static int qemudCheckMonitorPrompt(virConnectPtr conn ATTRIBUTE_UNUSED, struct qemud_driver *driver 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 qemudOpenMonitor(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, const char *monitor) { int monfd; char buf[1024]; int ret = -1; 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 (qemudSetCloseExec(monfd) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Unable to set monitor close-on-exec flag")); goto error; } if (qemudSetNonBlock(monfd) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Unable to put monitor into non-blocking mode")); goto error; } ret = qemudReadMonitorOutput(conn, driver, vm, monfd, buf, sizeof(buf), qemudCheckMonitorPrompt, "monitor"); /* Keep monitor open upon success */ if (ret == 0) return ret; error: close(monfd); return ret; } 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)) { if (VIR_ALLOC_N(*path, (tmp-dev)+1) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return -1; } strncpy(*path, dev, (tmp-dev)); (*path)[(tmp-dev)] = '\0'; /* ... 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, struct qemud_driver *driver, virDomainObjPtr vm, const char *output, int fd ATTRIBUTE_UNUSED) { char *monitor = NULL; 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 monitor, serial and parallel device args. This code must match that ordering.... */ /* So first comes the monitor device */ if ((ret = qemudExtractMonitorPath(conn, output, &offset, &monitor)) != 0) goto cleanup; /* then 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) goto cleanup; } } /* and finally 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) goto cleanup; } } /* Got them all, so now open the monitor console */ ret = qemudOpenMonitor(conn, driver, vm, monitor); cleanup: VIR_FREE(monitor); return ret; } static int qemudWaitForMonitor(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm) { char buf[1024]; /* Plenty of space to get startup greeting */ int ret = qemudReadMonitorOutput(conn, driver, vm, vm->stderr_fd, buf, sizeof(buf), qemudFindCharDevicePTYs, "console"); buf[sizeof(buf)-1] = '\0'; if (safewrite(vm->logfile, buf, strlen(buf)) < 0) { /* Log, but ignore failures to write logfile for VM */ qemudLog(QEMUD_WARN, _("Unable to log VM console data: %s\n"), strerror(errno)); } return ret; } static int qemudDetectVcpuPIDs(virConnectPtr conn, struct qemud_driver *driver, 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) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "%s", _("allocate cpumap")); return -1; } if (vm->def->virtType != VIR_DOMAIN_VIRT_KVM) { vm->vcpupids[0] = vm->pid; return 0; } if (qemudMonitorCommand(driver, 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, struct qemud_driver *driver, 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 (virNodeInfoPopulate(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) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("failed to set CPU affinity %s"), strerror(errno)); return -1; } } #endif /* HAVE_SCHED_GETAFFINITY */ if (migrateFrom == NULL) { /* Allow the CPUS to start executing */ if (qemudMonitorCommand(driver, 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 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 virDomainPtr qemudDomainLookupByName(virConnectPtr conn, const char *name); static int qemudStartVMDaemon(virConnectPtr conn, struct qemud_driver *driver, virDomainObjPtr vm, const char *migrateFrom) { const char **argv = NULL, **tmp; const char **progenv = NULL; int i, ret; char logfile[PATH_MAX]; struct stat sb; int *tapfds = NULL; int ntapfds = 0; unsigned int qemuCmdFlags; fd_set keepfd; const char *emulator; FD_ZERO(&keepfd); if (virDomainIsActive(vm)) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("VM is already active")); return -1; } if (vm->def->graphics && vm->def->graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC && vm->def->graphics->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")); return -1; } vm->def->graphics->data.vnc.port = port; } if ((strlen(driver->logDir) + /* path */ 1 + /* Separator */ strlen(vm->def->name) + /* basename */ 4 + /* suffix .log */ 1 /* NULL */) > PATH_MAX) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("config file path too long: %s/%s.log"), driver->logDir, vm->def->name); return -1; } strcpy(logfile, driver->logDir); strcat(logfile, "/"); strcat(logfile, vm->def->name); strcat(logfile, ".log"); if (virFileMakePath(driver->logDir) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("cannot create log directory %s: %s"), driver->logDir, strerror(errno)); return -1; } if ((vm->logfile = open(logfile, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR)) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("failed to create logfile %s: %s"), logfile, strerror(errno)); return -1; } if (qemudSetCloseExec(vm->logfile) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Unable to set VM logfile close-on-exec flag %s"), strerror(errno)); close(vm->logfile); vm->logfile = -1; return -1; } emulator = vm->def->emulator; if (!emulator) emulator = virDomainDefDefaultEmulator(conn, vm->def, driver->caps); if (!emulator) return -1; /* Make sure the binary we are about to try exec'ing exists. * Technically we could catch the exec() failure, but that's * in a sub-process so its hard to feed back a useful error */ if (stat(emulator, &sb) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Cannot find QEMU binary %s: %s"), emulator, strerror(errno)); return -1; } if (qemudExtractVersionInfo(emulator, NULL, &qemuCmdFlags) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, _("Cannot determine QEMU argv syntax %s"), emulator); return -1; } vm->def->id = driver->nextvmid++; if (qemudBuildCommandLine(conn, driver, vm, qemuCmdFlags, &argv, &progenv, &tapfds, &ntapfds, migrateFrom) < 0) { close(vm->logfile); vm->def->id = -1; vm->logfile = -1; return -1; } tmp = progenv; while (*tmp) { if (safewrite(vm->logfile, *tmp, strlen(*tmp)) < 0) qemudLog(QEMUD_WARN, _("Unable to write envv to logfile %d: %s\n"), errno, strerror(errno)); if (safewrite(vm->logfile, " ", 1) < 0) qemudLog(QEMUD_WARN, _("Unable to write envv to logfile %d: %s\n"), errno, strerror(errno)); tmp++; } tmp = argv; while (*tmp) { if (safewrite(vm->logfile, *tmp, strlen(*tmp)) < 0) qemudLog(QEMUD_WARN, _("Unable to write argv to logfile %d: %s\n"), errno, strerror(errno)); if (safewrite(vm->logfile, " ", 1) < 0) qemudLog(QEMUD_WARN, _("Unable to write argv to logfile %d: %s\n"), errno, strerror(errno)); tmp++; } if (safewrite(vm->logfile, "\n", 1) < 0) qemudLog(QEMUD_WARN, _("Unable to write argv to logfile %d: %s\n"), errno, strerror(errno)); vm->stdout_fd = -1; vm->stderr_fd = -1; for (i = 0 ; i < ntapfds ; i++) FD_SET(tapfds[i], &keepfd); ret = virExec(conn, argv, progenv, &keepfd, &vm->pid, vm->stdin_fd, &vm->stdout_fd, &vm->stderr_fd, VIR_EXEC_NONBLOCK); if (ret == 0) vm->state = migrateFrom ? VIR_DOMAIN_PAUSED : VIR_DOMAIN_RUNNING; else vm->def->id = -1; 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 == 0) { if ((virEventAddHandle(vm->stdout_fd, VIR_EVENT_HANDLE_READABLE | VIR_EVENT_HANDLE_ERROR | VIR_EVENT_HANDLE_HANGUP, qemudDispatchVMEvent, driver) < 0) || (virEventAddHandle(vm->stderr_fd, VIR_EVENT_HANDLE_READABLE | VIR_EVENT_HANDLE_ERROR | VIR_EVENT_HANDLE_HANGUP, qemudDispatchVMEvent, driver) < 0) || (qemudWaitForMonitor(conn, driver, vm) < 0) || (qemudDetectVcpuPIDs(conn, driver, vm) < 0) || (qemudInitCpus(conn, driver, vm, migrateFrom) < 0)) { qemudShutdownVMDaemon(conn, driver, vm); return -1; } } return ret; } static int qemudVMData(struct qemud_driver *driver ATTRIBUTE_UNUSED, virDomainObjPtr vm, int fd) { char buf[4096]; if (vm->pid < 0) return 0; for (;;) { int ret = read(fd, buf, sizeof(buf)-1); if (ret < 0) { if (errno == EAGAIN) return 0; return -1; } if (ret == 0) { return 0; } buf[ret] = '\0'; if (safewrite(vm->logfile, buf, ret) < 0) { /* Log, but ignore failures to write logfile for VM */ qemudLog(QEMUD_WARN, _("Unable to log VM console data: %s\n"), strerror(errno)); } } } static void qemudShutdownVMDaemon(virConnectPtr conn ATTRIBUTE_UNUSED, struct qemud_driver *driver, virDomainObjPtr vm) { if (!virDomainIsActive(vm)) return; qemudLog(QEMUD_INFO, _("Shutting down VM '%s'\n"), vm->def->name); kill(vm->pid, SIGTERM); qemudVMData(driver, vm, vm->stdout_fd); qemudVMData(driver, vm, vm->stderr_fd); virEventRemoveHandle(vm->stdout_fd); virEventRemoveHandle(vm->stderr_fd); if (close(vm->logfile) < 0) qemudLog(QEMUD_WARN, _("Unable to close logfile %d: %s\n"), errno, strerror(errno)); close(vm->stdout_fd); close(vm->stderr_fd); if (vm->monitor != -1) close(vm->monitor); vm->logfile = -1; vm->stdout_fd = -1; vm->stderr_fd = -1; vm->monitor = -1; if (waitpid(vm->pid, NULL, WNOHANG) != vm->pid) { kill(vm->pid, SIGKILL); if (waitpid(vm->pid, NULL, 0) != vm->pid) { qemudLog(QEMUD_WARN, "%s", _("Got unexpected pid, damn\n")); } } 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 int qemudDispatchVMLog(struct qemud_driver *driver, virDomainObjPtr vm, int fd) { if (qemudVMData(driver, vm, fd) < 0) { qemudShutdownVMDaemon(NULL, driver, vm); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_FAILED); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); } return 0; } static int qemudDispatchVMFailure(struct qemud_driver *driver, virDomainObjPtr vm, int fd ATTRIBUTE_UNUSED) { qemudShutdownVMDaemon(NULL, driver, vm); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return 0; } static void qemudDispatchVMEvent(int fd, int events, void *opaque) { struct qemud_driver *driver = (struct qemud_driver *)opaque; virDomainObjPtr vm = NULL; unsigned int i; for (i = 0 ; i < driver->domains.count ; i++) { if (virDomainIsActive(driver->domains.objs[i]) && (driver->domains.objs[i]->stdout_fd == fd || driver->domains.objs[i]->stderr_fd == fd)) { vm = driver->domains.objs[i]; break; } } if (!vm) return; if (events == VIR_EVENT_HANDLE_READABLE) qemudDispatchVMLog(driver, vm, fd); else qemudDispatchVMFailure(driver, vm, fd); } static int qemudMonitorCommand (const struct qemud_driver *driver ATTRIBUTE_UNUSED, const virDomainObjPtr vm, const char *cmd, char **reply) { int size = 0; char *buf = NULL; size_t cmdlen = strlen(cmd); if (safewrite(vm->monitor, cmd, cmdlen) != cmdlen) return -1; if (safewrite(vm->monitor, "\r", 1) != 1) 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 && ((tmp = strstr(buf, "\n(qemu) ")) != NULL)) { tmp[0] = '\0'; break; } pollagain: /* Need to wait for more data */ if (poll(&fd, 1, -1) < 0) { if (errno == EINTR) goto pollagain; goto error; } } /* Log, but ignore failures to write logfile for VM */ if (safewrite(vm->logfile, buf, strlen(buf)) < 0) qemudLog(QEMUD_WARN, _("Unable to log VM console data: %s\n"), strerror(errno)); *reply = buf; return 0; error: if (buf) { /* Log, but ignore failures to write logfile for VM */ if (safewrite(vm->logfile, buf, strlen(buf)) < 0) qemudLog(QEMUD_WARN, _("Unable to log VM console data: %s\n"), strerror(errno)); VIR_FREE(buf); } return -1; } /** * qemudProbe: * * Probe for the availability of the qemu driver, assume the * presence of QEmu emulation if the binaries are installed */ static int qemudProbe(void) { if ((virFileExists("/usr/bin/qemu")) || (virFileExists("/usr/bin/qemu-kvm")) || (virFileExists("/usr/bin/xenner"))) return 1; return 0; } static virDrvOpenStatus qemudOpen(virConnectPtr conn, virConnectAuthPtr auth ATTRIBUTE_UNUSED, int flags ATTRIBUTE_UNUSED) { uid_t uid = getuid(); if (qemu_driver == NULL) goto decline; if (!qemudProbe()) goto decline; if (conn->uri == NULL) { conn->uri = xmlParseURI(uid ? "qemu:///session" : "qemu:///system"); if (!conn->uri) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY,NULL); return VIR_DRV_OPEN_ERROR; } } else if (conn->uri->scheme == NULL || conn->uri->path == NULL) goto decline; if (STRNEQ (conn->uri->scheme, "qemu")) goto decline; if (uid != 0) { if (STRNEQ (conn->uri->path, "/session")) goto decline; } else { /* root */ if (STRNEQ (conn->uri->path, "/system") && STRNEQ (conn->uri->path, "/session")) goto decline; } conn->privateData = qemu_driver; return VIR_DRV_OPEN_SUCCESS; decline: return VIR_DRV_OPEN_DECLINED; } static int qemudClose(virConnectPtr conn) { /*struct qemud_driver *driver = (struct qemud_driver *)conn->privateData;*/ 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) { qemudLog(QEMUD_WARN, _("Unable to open %s: %s\n"), KVM_DEVICE, strerror(errno)); return maxvcpus; } 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; /* XXX future KVM will support SMP. Need to probe kernel to figure out KVM module version i guess */ 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 int qemudGetNodeInfo(virConnectPtr conn, virNodeInfoPtr nodeinfo) { return virNodeInfoPopulate(conn, nodeinfo); } static char *qemudGetCapabilities(virConnectPtr conn) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; char *xml; if ((xml = virCapabilitiesFormatXML(driver->caps)) == NULL) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "%s", _("failed to allocate space for capabilities support")); return NULL; } return xml; } #if HAVE_NUMACTL static int qemudNodeGetCellsFreeMemory(virConnectPtr conn, unsigned long long *freeMems, int startCell, int maxCells) { int n, lastCell, numCells; if (numa_available() < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SUPPORT, "%s", _("NUMA not supported on this host")); return -1; } lastCell = startCell + maxCells - 1; if (lastCell > numa_max_node()) lastCell = numa_max_node(); for (numCells = 0, n = startCell ; n <= lastCell ; n++) { long long mem; if (numa_node_size64(n, &mem) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Failed to query NUMA free memory")); return -1; } freeMems[numCells++] = mem; } return numCells; } static unsigned long long qemudNodeGetFreeMemory (virConnectPtr conn) { unsigned long long freeMem = 0; int n; if (numa_available() < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SUPPORT, "%s", _("NUMA not supported on this host")); return -1; } for (n = 0 ; n <= numa_max_node() ; n++) { long long mem; if (numa_node_size64(n, &mem) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("Failed to query NUMA free memory")); return -1; } freeMem += mem; } return freeMem; } #endif static int qemudGetProcessInfo(unsigned long long *cpuTime, int pid) { char proc[PATH_MAX]; FILE *pidinfo; unsigned long long usertime, systime; if (snprintf(proc, sizeof(proc), "/proc/%d/stat", pid) >= (int)sizeof(proc)) { return -1; } if (!(pidinfo = fopen(proc, "r"))) { /*printf("cannot read pid info");*/ /* VM probably shut down, so fake 0 */ *cpuTime = 0; return 0; } if (fscanf(pidinfo, "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu", &usertime, &systime) != 2) { qemudDebug("not enough arg"); return -1; } /* We got jiffies * We want nanoseconds * _SC_CLK_TCK is jiffies per second * So calulate thus.... */ *cpuTime = 1000ull * 1000ull * 1000ull * (usertime + systime) / (unsigned long long)sysconf(_SC_CLK_TCK); qemudDebug("Got %llu %llu %llu", usertime, systime, *cpuTime); fclose(pidinfo); return 0; } static virDomainPtr qemudDomainLookupByID(virConnectPtr conn, int id) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, id); virDomainPtr dom; if (!vm) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_DOMAIN, NULL); return NULL; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; return dom; } static virDomainPtr qemudDomainLookupByUUID(virConnectPtr conn, const unsigned char *uuid) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, uuid); virDomainPtr dom; if (!vm) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_DOMAIN, NULL); return NULL; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; return dom; } static virDomainPtr qemudDomainLookupByName(virConnectPtr conn, const char *name) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; virDomainObjPtr vm = virDomainFindByName(&driver->domains, name); virDomainPtr dom; if (!vm) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_DOMAIN, NULL); return NULL; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; return dom; } static int qemudGetVersion(virConnectPtr conn, unsigned long *version) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; if (qemudExtractVersion(conn, driver) < 0) return -1; *version = qemu_driver->qemuVersion; return 0; } static char * qemudGetHostname (virConnectPtr conn) { int r; char hostname[HOST_NAME_MAX+1], *str; r = gethostname (hostname, HOST_NAME_MAX+1); if (r == -1) { qemudReportError (conn, NULL, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); return NULL; } /* Caller frees this string. */ str = strdup (hostname); if (str == NULL) { qemudReportError (conn, NULL, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); return NULL; } return str; } static int qemudListDomains(virConnectPtr conn, int *ids, int nids) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; int got = 0, i; for (i = 0 ; i < driver->domains.count && got < nids ; i++) if (virDomainIsActive(driver->domains.objs[i])) ids[got++] = driver->domains.objs[i]->def->id; return got; } static int qemudNumDomains(virConnectPtr conn) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; int n = 0, i; for (i = 0 ; i < driver->domains.count ; i++) if (virDomainIsActive(driver->domains.objs[i])) n++; return n; } static virDomainPtr qemudDomainCreate(virConnectPtr conn, const char *xml, unsigned int flags ATTRIBUTE_UNUSED) { virDomainDefPtr def; virDomainObjPtr vm; virDomainPtr dom; struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; if (!(def = virDomainDefParseString(conn, driver->caps, xml))) return NULL; vm = virDomainFindByName(&driver->domains, def->name); if (vm) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain '%s' is already defined"), def->name); virDomainDefFree(def); return NULL; } vm = virDomainFindByUUID(&driver->domains, def->uuid); if (vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(def->uuid, uuidstr); qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain with uuid '%s' is already defined"), uuidstr); virDomainDefFree(def); return NULL; } if (!(vm = virDomainAssignDef(conn, &driver->domains, def))) { virDomainDefFree(def); return NULL; } if (qemudStartVMDaemon(conn, driver, vm, NULL) < 0) { virDomainRemoveInactive(&driver->domains, vm); return NULL; } qemudDomainEventDispatch(driver, 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; return dom; } static int qemudDomainSuspend(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; char *info; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } if (vm->state == VIR_DOMAIN_PAUSED) return 0; if (qemudMonitorCommand(driver, vm, "stop", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("suspend operation failed")); return -1; } vm->state = VIR_DOMAIN_PAUSED; qemudDebug("Reply %s", info); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_SUSPENDED, VIR_DOMAIN_EVENT_SUSPENDED_PAUSED); VIR_FREE(info); return 0; } static int qemudDomainResume(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; char *info; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } if (vm->state == VIR_DOMAIN_RUNNING) return 0; if (qemudMonitorCommand(driver, vm, "cont", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("resume operation failed")); return -1; } vm->state = VIR_DOMAIN_RUNNING; qemudDebug("Reply %s", info); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_RESUMED, VIR_DOMAIN_EVENT_RESUMED_UNPAUSED); VIR_FREE(info); return 0; } static int qemudDomainShutdown(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); char* info; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (qemudMonitorCommand(driver, vm, "system_powerdown", &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("shutdown operation failed")); return -1; } VIR_FREE(info); return 0; } static int qemudDomainDestroy(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } qemudShutdownVMDaemon(dom->conn, driver, vm); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_DESTROYED); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return 0; } static char *qemudDomainGetOSType(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); char *type; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return NULL; } if (!(type = strdup(vm->def->os.type))) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, "%s", _("failed to allocate space for ostype")); return NULL; } return type; } /* Returns max memory in kb, 0 if error */ static unsigned long qemudDomainGetMaxMemory(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr 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_INVALID_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); return 0; } return vm->def->maxmem; } static int qemudDomainSetMaxMemory(virDomainPtr dom, unsigned long newmax) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr 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_INVALID_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); return -1; } if (newmax < vm->def->memory) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("cannot set max memory lower than current memory")); return -1; } vm->def->maxmem = newmax; return 0; } static int qemudDomainSetMemory(virDomainPtr dom, unsigned long newmem) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr 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_INVALID_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); return -1; } if (virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("cannot set memory of an active domain")); return -1; } if (newmem > vm->def->maxmem) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("cannot set memory higher than max memory")); return -1; } vm->def->memory = newmem; return 0; } static int qemudDomainGetInfo(virDomainPtr dom, virDomainInfoPtr info) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } info->state = vm->state; if (!virDomainIsActive(vm)) { info->cpuTime = 0; } else { if (qemudGetProcessInfo(&(info->cpuTime), vm->pid) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, ("cannot read cputime for domain")); return -1; } } info->maxMem = vm->def->maxmem; info->memory = vm->def->memory; info->nrVirtCpu = vm->def->vcpus; return 0; } 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 1 struct qemud_save_header { char magic[sizeof(QEMUD_SAVE_MAGIC)-1]; int version; int xml_len; int was_running; int unused[16]; }; static int qemudDomainSave(virDomainPtr dom, const char *path) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); char *command, *info; int fd; char *safe_path; char *xml; struct qemud_save_header header; memset(&header, 0, sizeof(header)); memcpy(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic)); header.version = QEMUD_SAVE_VERSION; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } /* Pause */ if (vm->state == VIR_DOMAIN_RUNNING) { header.was_running = 1; if (qemudDomainSuspend(dom) != 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to pause domain")); return -1; } } /* 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")); return -1; } 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); VIR_FREE(xml); return -1; } if (safewrite(fd, &header, sizeof(header)) != sizeof(header)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to write save header")); close(fd); VIR_FREE(xml); return -1; } if (safewrite(fd, xml, header.xml_len) != header.xml_len) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to write xml")); close(fd); VIR_FREE(xml); return -1; } close(fd); VIR_FREE(xml); /* Migrate to file */ safe_path = qemudEscapeShellArg(path); if (!safe_path) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("out of memory")); return -1; } if (asprintf (&command, "migrate \"exec:" "dd of='%s' oflag=append conv=notrunc 2>/dev/null" "\"", safe_path) == -1) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("out of memory")); VIR_FREE(safe_path); return -1; } free(safe_path); if (qemudMonitorCommand(driver, vm, command, &info) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("migrate operation failed")); VIR_FREE(command); return -1; } DEBUG ("migrate reply: %s", 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")); VIR_FREE(info); VIR_FREE(command); return -1; } VIR_FREE(info); VIR_FREE(command); /* Shut it down */ qemudShutdownVMDaemon(dom->conn, driver, vm); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_SAVED); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return 0; } static int qemudDomainSetVcpus(virDomainPtr dom, unsigned int nvcpus) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int max; if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); return -1; } if (virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("cannot change vcpu count of an active domain")); return -1; } if ((max = qemudDomainGetMaxVcpus(dom)) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("could not determine max vcpus for the domain")); return -1; } 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); return -1; } vm->def->vcpus = nvcpus; return 0; } #if HAVE_SCHED_GETAFFINITY static int qemudDomainPinVcpu(virDomainPtr dom, unsigned int vcpu, unsigned char *cpumap, int maplen) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); cpu_set_t mask; int i, maxcpu; virNodeInfo nodeinfo; if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s",_("cannot pin vcpus on an inactive domain")); return -1; } if (vcpu > (vm->nvcpupids-1)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("vcpu number out of range %d > %d"), vcpu, vm->nvcpupids); return -1; } if (virNodeInfoPopulate(dom->conn, &nodeinfo) < 0) return -1; 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) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("cannot set affinity: %s"), strerror(errno)); return -1; } } else { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("cpu affinity is not supported")); return -1; } return 0; } static int qemudDomainGetVcpus(virDomainPtr dom, virVcpuInfoPtr info, int maxinfo, unsigned char *cpumaps, int maplen) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); virNodeInfo nodeinfo; int i, v, maxcpu; if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s",_("cannot pin vcpus on an inactive domain")); return -1; } if (virNodeInfoPopulate(dom->conn, &nodeinfo) < 0) return -1; 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) return 0; 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; /* XXX cpu time, current pCPU mapping */ } } 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) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("cannot get affinity: %s"), strerror(errno)); return -1; } 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")); return -1; } } return maxinfo; } #endif /* HAVE_SCHED_GETAFFINITY */ static int qemudDomainGetMaxVcpus(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); const char *type; int ret; if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); return -1; } 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); return -1; } if ((ret = qemudGetMaxVCPUs(dom->conn, type)) < 0) { return -1; } return ret; } static int qemudDomainRestore(virConnectPtr conn, const char *path) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; virDomainDefPtr def; virDomainObjPtr vm; int fd; int ret; char *xml; struct qemud_save_header header; /* 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")); return -1; } if (saferead(fd, &header, sizeof(header)) != sizeof(header)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to read qemu header")); close(fd); return -1; } if (memcmp(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic)) != 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("image magic is incorrect")); close(fd); return -1; } 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); close(fd); return -1; } if (VIR_ALLOC_N(xml, header.xml_len) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("out of memory")); close(fd); return -1; } if (saferead(fd, xml, header.xml_len) != header.xml_len) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to read XML")); close(fd); VIR_FREE(xml); return -1; } /* Create a domain from this XML */ if (!(def = virDomainDefParseString(conn, driver->caps, xml))) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to parse XML")); close(fd); VIR_FREE(xml); return -1; } VIR_FREE(xml); /* Ensure the name and UUID don't already exist in an active VM */ vm = virDomainFindByUUID(&driver->domains, def->uuid); if (!vm) vm = virDomainFindByName(&driver->domains, def->name); if (vm && virDomainIsActive(vm)) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, _("domain is already active as '%s'"), vm->def->name); close(fd); return -1; } if (!(vm = virDomainAssignDef(conn, &driver->domains, def))) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to assign new VM")); virDomainDefFree(def); close(fd); return -1; } /* Set the migration source and start it up. */ vm->stdin_fd = fd; ret = qemudStartVMDaemon(conn, driver, vm, "stdio"); close(fd); vm->stdin_fd = -1; if (ret < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to start VM")); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return -1; } qemudDomainEventDispatch(driver, 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(driver, vm, "cont", &info) < 0) { qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to resume domain")); return -1; } VIR_FREE(info); vm->state = VIR_DOMAIN_RUNNING; } return 0; } static char *qemudDomainDumpXML(virDomainPtr dom, int flags ATTRIBUTE_UNUSED) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return NULL; } return virDomainDefFormat(dom->conn, (flags & VIR_DOMAIN_XML_INACTIVE) && vm->newDef ? vm->newDef : vm->def, flags); } static int qemudListDefinedDomains(virConnectPtr conn, char **const names, int nnames) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; int got = 0, i; for (i = 0 ; i < driver->domains.count && got < nnames ; i++) { if (!virDomainIsActive(driver->domains.objs[i])) { if (!(names[got++] = strdup(driver->domains.objs[i]->def->name))) { qemudReportError(conn, NULL, NULL, VIR_ERR_NO_MEMORY, "%s", _("failed to allocate space for VM name string")); goto cleanup; } } } return got; cleanup: for (i = 0 ; i < got ; i++) VIR_FREE(names[i]); return -1; } static int qemudNumDefinedDomains(virConnectPtr conn) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; int n = 0, i; for (i = 0 ; i < driver->domains.count ; i++) if (!virDomainIsActive(driver->domains.objs[i])) n++; return n; } static int qemudDomainStart(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int ret; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } ret = qemudStartVMDaemon(dom->conn, driver, vm, NULL); if (ret < 0) return ret; qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_BOOTED); return 0; } static virDomainPtr qemudDomainDefine(virConnectPtr conn, const char *xml) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; virDomainDefPtr def; virDomainObjPtr vm; virDomainPtr dom; if (!(def = virDomainDefParseString(conn, driver->caps, xml))) return NULL; if (!(vm = virDomainAssignDef(conn, &driver->domains, def))) { virDomainDefFree(def); return NULL; } vm->persistent = 1; if (virDomainSaveConfig(conn, driver->configDir, vm->newDef ? vm->newDef : vm->def) < 0) { virDomainRemoveInactive(&driver->domains, vm); return NULL; } dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) dom->id = vm->def->id; return dom; } static int qemudDomainUndefine(virDomainPtr dom) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } if (virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot delete active domain")); return -1; } if (!vm->persistent) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot undefine transient domain")); return -1; } if (virDomainDeleteConfig(dom->conn, driver->configDir, driver->autostartDir, vm) < 0) return -1; virDomainRemoveInactive(&driver->domains, vm); return 0; } /* Return the disks name for use in monitor commands */ static char *qemudDiskDeviceName(const virDomainPtr dom, const virDomainDiskDefPtr disk) { int busid, devid; int ret; char *devname; if (virDiskNameToBusDeviceIndex(disk, &busid, &devid) < 0) { qemudReportError(dom->conn, dom, 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 = asprintf(&devname, "ide%d-hd%d", busid, devid); else ret = asprintf(&devname, "ide%d-cd%d", busid, devid); break; case VIR_DOMAIN_DISK_BUS_SCSI: if (disk->device == VIR_DOMAIN_DISK_DEVICE_DISK) ret = asprintf(&devname, "scsi%d-hd%d", busid, devid); else ret = asprintf(&devname, "scsi%d-cd%d", busid, devid); break; case VIR_DOMAIN_DISK_BUS_FDC: ret = asprintf(&devname, "floppy%d", devid); break; case VIR_DOMAIN_DISK_BUS_VIRTIO: ret = asprintf(&devname, "virtio%d", devid); break; default: qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, _("Unsupported disk name mapping for bus '%s'"), virDomainDiskBusTypeToString(disk->bus)); return NULL; } if (ret == -1) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return NULL; } return devname; } static int qemudDomainChangeEjectableMedia(virDomainPtr dom, virDomainDeviceDefPtr dev) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); virDomainDiskDefPtr origdisk = NULL, newdisk; char *cmd, *reply, *safe_path; char *devname = NULL; unsigned int qemuCmdFlags; int i; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } 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(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("No device with bus '%s' and target '%s'"), virDomainDiskBusTypeToString(newdisk->bus), newdisk->dst); return -1; } if (qemudExtractVersionInfo(vm->def->emulator, NULL, &qemuCmdFlags) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("Cannot determine QEMU argv syntax %s"), vm->def->emulator); return -1; } if (qemuCmdFlags & QEMUD_CMD_FLAG_DRIVE) { if (!(devname = qemudDiskDeviceName(dom, 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(dom->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) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return -1; } } if (newdisk->src) { safe_path = qemudEscapeMonitorArg(newdisk->src); if (!safe_path) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, NULL); VIR_FREE(devname); return -1; } if (asprintf (&cmd, "change %s \"%s\"", devname, safe_path) == -1) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, NULL); VIR_FREE(safe_path); VIR_FREE(devname); return -1; } VIR_FREE(safe_path); } else if (asprintf(&cmd, "eject %s", devname) == -1) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_MEMORY, NULL); VIR_FREE(devname); return -1; } VIR_FREE(devname); if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot 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 ("ejectable media change reply: %s", reply); if (strstr(reply, "\ndevice ")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("changing cdrom media failed")); 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 qemudDomainAttachPciDiskDevice(virDomainPtr dom, virDomainDeviceDefPtr dev) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int ret, i; char *cmd, *reply, *s; char *safe_path; const char* type = virDomainDiskBusTypeToString(dev->data.disk->bus); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } for (i = 0 ; i < vm->def->ndisks ; i++) { if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) { qemudReportError(dom->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) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return -1; } safe_path = qemudEscapeMonitorArg(dev->data.disk->src); if (!safe_path) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("out of memory")); return -1; } ret = asprintf(&cmd, "pci_add 0 storage file=%s,if=%s", safe_path, type); VIR_FREE(safe_path); if (ret == -1) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return ret; } if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("cannot attach %s disk"), type); VIR_FREE(cmd); return -1; } DEBUG ("pci_add reply: %s", reply); /* If the command succeeds qemu prints: * OK bus 0... */ #define PCI_ATTACH_OK_MSG "OK bus 0, slot " if ((s=strstr(reply, PCI_ATTACH_OK_MSG))) { char* dummy = s; s += strlen(PCI_ATTACH_OK_MSG); if (virStrToLong_i ((const char*)s, &dummy, 10, &dev->data.disk->slotnum) == -1) qemudLog(QEMUD_WARN, "%s", _("Unable to parse slot number\n")); } else { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("adding %s disk failed"), type); VIR_FREE(reply); VIR_FREE(cmd); return -1; } vm->def->disks[vm->def->ndisks++] = dev->data.disk; qsort(vm->def->disks, vm->def->ndisks, sizeof(*vm->def->disks), virDomainDiskQSort); VIR_FREE(reply); VIR_FREE(cmd); return 0; } static int qemudDomainAttachUsbMassstorageDevice(virDomainPtr dom, virDomainDeviceDefPtr dev) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int ret, i; char *safe_path; char *cmd, *reply; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } for (i = 0 ; i < vm->def->ndisks ; i++) { if (STREQ(vm->def->disks[i]->dst, dev->data.disk->dst)) { qemudReportError(dom->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) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return -1; } safe_path = qemudEscapeMonitorArg(dev->data.disk->src); if (!safe_path) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("out of memory")); return -1; } ret = asprintf(&cmd, "usb_add disk:%s", safe_path); VIR_FREE(safe_path); if (ret == -1) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return ret; } if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot attach usb disk")); VIR_FREE(cmd); return -1; } DEBUG ("attach_usb reply: %s", reply); /* If the command failed qemu prints: * Could not add ... */ if (strstr(reply, "Could not add ")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("adding usb disk failed")); VIR_FREE(reply); VIR_FREE(cmd); return -1; } vm->def->disks[vm->def->ndisks++] = dev->data.disk; qsort(vm->def->disks, vm->def->ndisks, sizeof(*vm->def->disks), virDomainDiskQSort); VIR_FREE(reply); VIR_FREE(cmd); return 0; } static int qemudDomainAttachHostDevice(virDomainPtr dom, virDomainDeviceDefPtr dev) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int ret; char *cmd, *reply; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } if (VIR_REALLOC_N(vm->def->hostdevs, vm->def->nhostdevs+1) < 0) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return -1; } if (dev->data.hostdev->source.subsys.usb.vendor) { ret = asprintf(&cmd, "usb_add host:%.4x:%.4x", dev->data.hostdev->source.subsys.usb.vendor, dev->data.hostdev->source.subsys.usb.product); } else { ret = asprintf(&cmd, "usb_add host:%.3d.%.3d", dev->data.hostdev->source.subsys.usb.bus, dev->data.hostdev->source.subsys.usb.device); } if (ret == -1) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return -1; } if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("cannot attach usb device")); VIR_FREE(cmd); return -1; } DEBUG ("attach_usb reply: %s", reply); /* If the command failed qemu prints: * Could not add ... */ if (strstr(reply, "Could not add ")) { qemudReportError (dom->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 qemudDomainAttachDevice(virDomainPtr dom, const char *xml) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); virDomainDeviceDefPtr dev; int ret = 0, supported = 0; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot attach device on inactive domain")); return -1; } dev = virDomainDeviceDefParse(dom->conn, driver->caps, vm->def, xml); if (dev == NULL) { return -1; } if (dev->type == VIR_DOMAIN_DEVICE_DISK) { switch (dev->data.disk->device) { case VIR_DOMAIN_DISK_DEVICE_CDROM: case VIR_DOMAIN_DISK_DEVICE_FLOPPY: supported = 1; ret = qemudDomainChangeEjectableMedia(dom, dev); break; case VIR_DOMAIN_DISK_DEVICE_DISK: if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_USB) { supported = 1; ret = qemudDomainAttachUsbMassstorageDevice(dom, dev); } else if (dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_SCSI || dev->data.disk->bus == VIR_DOMAIN_DISK_BUS_VIRTIO) { supported = 1; ret = qemudDomainAttachPciDiskDevice(dom, dev); } break; } } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV && dev->data.hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS && dev->data.hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB) { supported = 1; ret = qemudDomainAttachHostDevice(dom, dev); } if (!supported) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("this device type cannot be attached")); ret = -1; } VIR_FREE(dev); return ret; } static int qemudDomainDetachPciDiskDevice(virDomainPtr dom, virDomainDeviceDefPtr dev) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int i, ret = -1; char *cmd, *reply; virDomainDiskDefPtr detach = NULL; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } 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(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("disk %s not found"), dev->data.disk->dst); return -1; } if (detach->slotnum < 1) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("disk %s cannot be detached - invalid slot number %d"), detach->dst, detach->slotnum); return -1; } ret = asprintf(&cmd, "pci_del 0 %d", detach->slotnum); if (ret == -1) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); return ret; } if (qemudMonitorCommand(driver, vm, cmd, &reply) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("failed to execute detach disk %s command"), detach->dst); VIR_FREE(cmd); return -1; } DEBUG ("pci_del reply: %s", reply); /* If the command fails due to a wrong slot qemu prints: invalid slot, * nothing is printed on success */ if (strstr(reply, "invalid slot")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, _("failed to detach disk %s: invalid slot %d"), detach->dst, detach->slotnum); ret = -1; goto out; } if (vm->def->ndisks > 1) { vm->def->disks[i] = vm->def->disks[--vm->def->ndisks]; if (VIR_REALLOC_N(vm->def->disks, vm->def->ndisks) < 0) { qemudReportError(dom->conn, NULL, NULL, VIR_ERR_NO_MEMORY, NULL); ret = -1; goto out; } qsort(vm->def->disks, vm->def->ndisks, sizeof(*vm->def->disks), virDomainDiskQSort); } else { VIR_FREE(vm->def->disks[0]); vm->def->ndisks = 0; } ret = 0; out: VIR_FREE(reply); VIR_FREE(cmd); return ret; } static int qemudDomainDetachDevice(virDomainPtr dom, const char *xml) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); virDomainDeviceDefPtr dev; int ret = 0; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot attach device on inactive domain")); return -1; } dev = virDomainDeviceDefParse(dom->conn, driver->caps, vm->def, xml); if (dev == NULL) { return -1; } 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, dev); else { qemudReportError(dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("only SCSI or virtio disk device can be detached dynamically")); ret = -1; } VIR_FREE(dev); return ret; } static int qemudDomainGetAutostart(virDomainPtr dom, int *autostart) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } *autostart = vm->autostart; return 0; } static int qemudDomainSetAutostart(virDomainPtr dom, int autostart) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); char *configFile = NULL, *autostartLink = NULL; int ret = -1; if (!vm) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } if (!vm->persistent) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("cannot set autostart for transient domain")); return -1; } autostart = (autostart != 0); if (vm->autostart == autostart) return 0; 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))) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("cannot create autostart directory %s: %s"), driver->autostartDir, strerror(err)); goto cleanup; } if (symlink(configFile, autostartLink) < 0) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("Failed to create symlink '%s to '%s': %s"), autostartLink, configFile, strerror(errno)); goto cleanup; } } else { if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INTERNAL_ERROR, _("Failed to delete symlink '%s': %s"), autostartLink, strerror(errno)); goto cleanup; } } vm->autostart = autostart; ret = 0; cleanup: VIR_FREE(configFile); VIR_FREE(autostartLink); 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 = (struct qemud_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; const virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); virDomainDiskDefPtr disk = NULL; if (!vm) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive (vm)) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } 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); return -1; } qemu_dev_name = qemudDiskDeviceName(dom, disk); if (!qemu_dev_name) return -1; len = strlen (qemu_dev_name); if (qemudMonitorCommand (driver, vm, "info blockstats", &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("'info blockstats' command failed")); goto out; } DEBUG ("info blockstats reply: %s", 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 (STRPREFIX (info, "info ")) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT, "%s", _("'info blockstats' not supported by this qemu")); goto out; } 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 ("error reading rd_bytes: %s", p); } else if (STRPREFIX (p, "wr_bytes=")) { p += 9; if (virStrToLong_ll (p, &dummy, 10, &stats->wr_bytes) == -1) DEBUG ("error reading wr_bytes: %s", p); } else if (STRPREFIX (p, "rd_operations=")) { p += 14; if (virStrToLong_ll (p, &dummy, 10, &stats->rd_req) == -1) DEBUG ("error reading rd_req: %s", p); } else if (STRPREFIX (p, "wr_operations=")) { p += 14; if (virStrToLong_ll (p, &dummy, 10, &stats->wr_req) == -1) DEBUG ("error reading wr_req: %s", p); } else DEBUG ("unknown block stat near %s", p); /* Skip to next label. */ p = strchr (p, ' '); if (!p || p >= eol) break; p++; } ret = 0; goto out; } /* 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); out: VIR_FREE(qemu_dev_name); VIR_FREE(info); return ret; } static int qemudDomainInterfaceStats (virDomainPtr dom, const char *path, struct _virDomainInterfaceStats *stats) { #ifdef __linux__ struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); int i; if (!vm) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } if (!path || path[0] == '\0') { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("NULL or empty path")); return -1; } /* 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)) goto ok; } qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, _("invalid path, '%s' is not a known interface"), path); return -1; ok: return linuxDomainInterfaceStats (dom->conn, path, stats); #else 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 = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByUUID(&driver->domains, dom->uuid); int fd, ret = -1, i; if (!vm) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, "%s", _("no domain with matching uuid")); return -1; } if (!path || path[0] == '\0') { qemudReportError(dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("NULL or empty path")); return -1; } /* 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)) goto found; } qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("invalid path")); return -1; found: /* The path is correct, now try to open it and get its size. */ fd = open (path, O_RDONLY); if (fd == -1) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); goto done; } /* 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) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); goto done; } ret = 0; done: if (fd >= 0) close (fd); return ret; } static int qemudDomainMemoryPeek (virDomainPtr dom, unsigned long long offset, size_t size, void *buffer, unsigned int flags) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); char cmd[256], *info; char tmp[] = TEMPDIR "/qemu.mem.XXXXXX"; int fd = -1, ret = -1; if (flags != VIR_MEMORY_VIRTUAL) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG, "%s", _("QEMU driver only supports virtual memory addrs")); return -1; } if (!vm) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive(vm)) { qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } /* Create a temporary filename. */ if ((fd = mkstemp (tmp)) == -1) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); return -1; } /* Issue the memsave command. */ snprintf (cmd, sizeof cmd, "memsave %llu %zi \"%s\"", offset, size, tmp); if (qemudMonitorCommand (driver, vm, cmd, &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("'memsave' command failed")); goto done; } DEBUG ("memsave reply: %s", info); free (info); /* Read the memory file into buffer. */ if (saferead (fd, buffer, size) == (ssize_t) -1) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); goto done; } ret = 0; done: if (fd >= 0) close (fd); unlink (tmp); return ret; } static int qemudDomainEventRegister (virConnectPtr conn, void *callback, void *opaque) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; return virDomainEventCallbackListAdd(conn, driver->domainEventCallbacks, callback, opaque); } static int qemudDomainEventDeregister (virConnectPtr conn, void *callback) { struct qemud_driver *driver = (struct qemud_driver *)conn->privateData; return virDomainEventCallbackListRemove(conn, driver->domainEventCallbacks, callback); } static void qemudDomainEventDispatch (struct qemud_driver *driver, virDomainObjPtr vm, int event, int detail) { int i; virDomainEventCallbackListPtr cbList; cbList = driver->domainEventCallbacks; for(i=0 ; i < cbList->count ; i++) { if(cbList->callbacks[i] && cbList->callbacks[i]->cb) { virConnectPtr conn = cbList->callbacks[i]->conn; virDomainPtr dom = virGetDomain(conn, vm->def->name, vm->def->uuid); if (dom) { dom->id = virDomainIsActive(vm) ? vm->def->id : -1; DEBUG("Dispatching callback %p %p event %d detail %d", cbList->callbacks[i], cbList->callbacks[i]->cb, event, detail); cbList->callbacks[i]->cb(cbList->callbacks[i]->conn, dom, event, detail, cbList->callbacks[i]->opaque); virDomainFree(dom); } } } } /* 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 = (struct qemud_driver *)dconn->privateData; virDomainDefPtr def; virDomainObjPtr vm = NULL; int this_port; char hostname [HOST_NAME_MAX+1]; char migrateFrom [64]; const char *p; if (!dom_xml) { qemudReportError (dconn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", _("no domain XML passed")); return -1; } /* 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 (gethostname (hostname, HOST_NAME_MAX+1) == -1) { qemudReportError (dconn, NULL, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); return -1; } /* Caller frees */ if (asprintf(uri_out, "tcp:%s:%d", hostname, this_port) < 0) { qemudReportError (dconn, NULL, NULL, VIR_ERR_NO_MEMORY, "%s", strerror (errno)); return -1; } } 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 (!STREQLEN (uri_in, "tcp:", 6)) { qemudReportError (dconn, NULL, NULL, VIR_ERR_INVALID_ARG, "%s", _("only tcp URIs are supported for KVM migrations")); return -1; } /* 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")); return -1; } } /* Parse the domain XML. */ if (!(def = virDomainDefParseString(dconn, driver->caps, dom_xml))) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to parse XML")); return -1; } /* 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")); } #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); virDomainDefFree(def); return -1; } } if (!(vm = virDomainAssignDef(dconn, &driver->domains, def))) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to assign new VM")); virDomainDefFree(def); return -1; } /* 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) < 0) { qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("failed to start listening VM")); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return -1; } qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STARTED, VIR_DOMAIN_EVENT_STARTED_MIGRATED); return 0; } /* 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 ATTRIBUTE_UNUSED, const char *dname ATTRIBUTE_UNUSED, unsigned long resource) { struct qemud_driver *driver = (struct qemud_driver *)dom->conn->privateData; virDomainObjPtr vm = virDomainFindByID(&driver->domains, dom->id); char *safe_uri; char cmd[HOST_NAME_MAX+50]; char *info; if (!vm) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching id %d"), dom->id); return -1; } if (!virDomainIsActive(vm)) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("domain is not running")); return -1; } if (!(flags & VIR_MIGRATE_LIVE)) { /* Pause domain for non-live migration */ snprintf(cmd, sizeof cmd, "%s", "stop"); qemudMonitorCommand (driver, vm, cmd, &info); DEBUG ("stop reply: %s", info); VIR_FREE(info); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_SUSPENDED, VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED); } if (resource > 0) { /* Issue migrate_set_speed command. Don't worry if it fails. */ snprintf (cmd, sizeof cmd, "migrate_set_speed %lum", resource); qemudMonitorCommand (driver, vm, cmd, &info); DEBUG ("migrate_set_speed reply: %s", info); VIR_FREE (info); } /* Issue the migrate command. */ safe_uri = qemudEscapeMonitorArg (uri); if (!safe_uri) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_SYSTEM_ERROR, "%s", strerror (errno)); return -1; } snprintf (cmd, sizeof cmd, "migrate \"%s\"", safe_uri); VIR_FREE (safe_uri); if (qemudMonitorCommand (driver, vm, cmd, &info) < 0) { qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED, "%s", _("migrate operation failed")); return -1; } DEBUG ("migrate reply: %s", 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); VIR_FREE(info); return -1; } VIR_FREE (info); /* Clean up the source domain. */ qemudShutdownVMDaemon (dom->conn, driver, vm); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_MIGRATED); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return 0; } /* 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 = (struct qemud_driver *)dconn->privateData; virDomainObjPtr vm = virDomainFindByName(&driver->domains, dname); virDomainPtr dom; char *info = NULL; if (!vm) { qemudReportError (dconn, NULL, NULL, VIR_ERR_INVALID_DOMAIN, _("no domain with matching name %s"), dname); return NULL; } /* 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); VIR_FREE(info); vm->state = VIR_DOMAIN_RUNNING; qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_RESUMED, VIR_DOMAIN_EVENT_RESUMED_MIGRATED); return dom; } else { qemudShutdownVMDaemon (dconn, driver, vm); qemudDomainEventDispatch(driver, vm, VIR_DOMAIN_EVENT_STOPPED, VIR_DOMAIN_EVENT_STOPPED_FAILED); if (!vm->persistent) virDomainRemoveInactive(&driver->domains, vm); return NULL; } } static virDriver qemuDriver = { VIR_DRV_QEMU, "QEMU", LIBVIR_VERSION_NUMBER, qemudOpen, /* open */ qemudClose, /* close */ qemudSupportsFeature, /* supports_feature */ qemudGetType, /* type */ qemudGetVersion, /* version */ qemudGetHostname, /* hostname */ NULL, /* URI */ qemudGetMaxVCPUs, /* getMaxVcpus */ qemudGetNodeInfo, /* 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 */ NULL, /* domainCoreDump */ qemudDomainSetVcpus, /* domainSetVcpus */ #if HAVE_SCHED_GETAFFINITY qemudDomainPinVcpu, /* domainPinVcpu */ qemudDomainGetVcpus, /* domainGetVcpus */ #else NULL, /* domainPinVcpu */ NULL, /* domainGetVcpus */ #endif qemudDomainGetMaxVcpus, /* domainGetMaxVcpus */ qemudDomainDumpXML, /* domainDumpXML */ qemudListDefinedDomains, /* listDomains */ qemudNumDefinedDomains, /* numOfDomains */ qemudDomainStart, /* domainCreate */ qemudDomainDefine, /* domainDefineXML */ qemudDomainUndefine, /* domainUndefine */ qemudDomainAttachDevice, /* domainAttachDevice */ qemudDomainDetachDevice, /* domainDetachDevice */ qemudDomainGetAutostart, /* domainGetAutostart */ qemudDomainSetAutostart, /* domainSetAutostart */ NULL, /* domainGetSchedulerType */ NULL, /* domainGetSchedulerParameters */ NULL, /* domainSetSchedulerParameters */ NULL, /* domainMigratePrepare (v1) */ qemudDomainMigratePerform, /* domainMigratePerform */ NULL, /* domainMigrateFinish */ qemudDomainBlockStats, /* domainBlockStats */ qemudDomainInterfaceStats, /* domainInterfaceStats */ qemudDomainBlockPeek, /* domainBlockPeek */ qemudDomainMemoryPeek, /* domainMemoryPeek */ #if HAVE_NUMACTL qemudNodeGetCellsFreeMemory, /* nodeGetCellsFreeMemory */ qemudNodeGetFreeMemory, /* getFreeMemory */ #else NULL, /* nodeGetCellsFreeMemory */ NULL, /* getFreeMemory */ #endif qemudDomainEventRegister, /* domainEventRegister */ qemudDomainEventDeregister, /* domainEventDeregister */ qemudDomainMigratePrepare2, /* domainMigratePrepare2 */ qemudDomainMigrateFinish2, /* domainMigrateFinish2 */ }; static virStateDriver qemuStateDriver = { .initialize = qemudStartup, .cleanup = qemudShutdown, .reload = qemudReload, .active = qemudActive, }; int qemudRegister(void) { virRegisterDriver(&qemuDriver); virRegisterStateDriver(&qemuStateDriver); return 0; }