/* * qemud.c: daemon start of day, guest process & i/o management * * Copyright (C) 2006, 2007 Red Hat, Inc. * Copyright (C) 2006 Daniel P. Berrange * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Author: Daniel P. Berrange */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "internal.h" #include "dispatch.h" #include "driver.h" #include "conf.h" #include "iptables.h" static int godaemon = 0; static int verbose = 0; static int sigwrite = -1; static sig_atomic_t sig_errors = 0; static int sig_lasterrno = 0; static void sig_handler(int sig) { unsigned char sigc = sig; int origerrno; int r; if (sig == SIGCHLD) /* We explicitly waitpid the child later */ return; origerrno = errno; r = write(sigwrite, &sigc, 1); if (r == -1) { sig_errors++; sig_lasterrno = errno; } errno = origerrno; } static int qemudDispatchSignal(struct qemud_server *server) { unsigned char sigc; struct qemud_vm *vm; struct qemud_network *network; int ret; if (read(server->sigread, &sigc, 1) != 1) { qemudLog(QEMUD_ERR, "Failed to read from signal pipe: %s", strerror(errno)); return -1; } ret = 0; switch (sigc) { case SIGHUP: qemudLog(QEMUD_INFO, "Reloading configuration on SIGHUP"); ret = qemudScanConfigs(server); if (server->iptables) { qemudLog(QEMUD_INFO, "Reloading iptables rules"); iptablesReloadRules(server->iptables); } break; case SIGINT: case SIGQUIT: case SIGTERM: qemudLog(QEMUD_WARN, "Shutting down on signal %d", sigc); /* shutdown active VMs */ vm = server->vms; while (vm) { struct qemud_vm *next = vm->next; if (qemudIsActiveVM(vm)) qemudShutdownVMDaemon(server, vm); vm = next; } /* free inactive VMs */ vm = server->vms; while (vm) { struct qemud_vm *next = vm->next; qemudFreeVM(vm); vm = next; } server->vms = NULL; server->nactivevms = 0; server->ninactivevms = 0; /* shutdown active networks */ network = server->networks; while (network) { struct qemud_network *next = network->next; if (qemudIsActiveNetwork(network)) qemudShutdownNetworkDaemon(server, network); network = next; } /* free inactive networks */ network = server->networks; while (network) { struct qemud_network *next = network->next; qemudFreeNetwork(network); network = next; } server->networks = NULL; server->nactivenetworks = 0; server->ninactivenetworks = 0; server->shutdown = 1; break; default: break; } return ret; } 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, "Failed to set close-on-exec file descriptor flag"); 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, "Failed to set non-blocking file descriptor flag"); return -1; } void qemudLog(int priority, const char *fmt, ...) { va_list args; va_start(args, fmt); if (godaemon) { int sysprio = -1; switch(priority) { case QEMUD_ERR: sysprio = LOG_ERR; break; case QEMUD_WARN: sysprio = LOG_WARNING; break; case QEMUD_INFO: if (verbose) sysprio = LOG_INFO; break; #ifdef ENABLE_DEBUG case QEMUD_DEBUG: if (verbose) sysprio = LOG_DEBUG; break; #endif default: break; } if (sysprio != -1) vsyslog(sysprio, fmt, args); } else { switch(priority) { case QEMUD_ERR: case QEMUD_WARN: vfprintf(stderr, fmt, args); fputc('\n', stderr); break; case QEMUD_INFO: if (verbose) { vprintf(fmt, args); fputc('\n', stdout); } break; #ifdef ENABLE_DEBUG case QEMUD_DEBUG: if (verbose) { vprintf(fmt, args); fputc('\n', stdout); } break; #endif default: break; } } va_end(args); } static int qemudGoDaemon(void) { int pid = fork(); switch (pid) { case 0: { int stdinfd = -1; int stdoutfd = -1; int nextpid; if ((stdinfd = open(_PATH_DEVNULL, O_RDONLY)) < 0) goto cleanup; if ((stdoutfd = open(_PATH_DEVNULL, O_WRONLY)) < 0) goto cleanup; if (dup2(stdinfd, STDIN_FILENO) != STDIN_FILENO) goto cleanup; if (dup2(stdoutfd, STDOUT_FILENO) != STDOUT_FILENO) goto cleanup; if (dup2(stdoutfd, STDERR_FILENO) != STDERR_FILENO) goto cleanup; if (close(stdinfd) < 0) goto cleanup; stdinfd = -1; if (close(stdoutfd) < 0) goto cleanup; stdoutfd = -1; if (setsid() < 0) goto cleanup; nextpid = fork(); switch (nextpid) { case 0: return 0; case -1: return -1; default: return nextpid; } cleanup: if (stdoutfd != -1) close(stdoutfd); if (stdinfd != -1) close(stdinfd); return -1; } case -1: return -1; default: { int got, status = 0; /* We wait to make sure the next child forked successfully */ if ((got = waitpid(pid, &status, 0)) < 0 || got != pid || status != 0) { return -1; } return pid; } } } static int qemudWritePidFile(const char *pidFile) { int fd; FILE *fh; if (pidFile[0] == '\0') return 0; if ((fd = open(pidFile, O_WRONLY|O_CREAT|O_EXCL, 0644)) < 0) { qemudLog(QEMUD_ERR, "Failed to open pid file '%s' : %s", pidFile, strerror(errno)); return -1; } if (!(fh = fdopen(fd, "w"))) { qemudLog(QEMUD_ERR, "Failed to fdopen pid file '%s' : %s", pidFile, strerror(errno)); close(fd); return -1; } if (fprintf(fh, "%lu\n", (unsigned long)getpid()) < 0) { qemudLog(QEMUD_ERR, "Failed to write to pid file '%s' : %s", pidFile, strerror(errno)); close(fd); return -1; } if (fclose(fh) == EOF) { qemudLog(QEMUD_ERR, "Failed to close pid file '%s' : %s", pidFile, strerror(errno)); return -1; } return 0; } static int qemudListenUnix(struct qemud_server *server, const char *path, int readonly) { struct qemud_socket *sock = calloc(1, sizeof(struct qemud_socket)); struct sockaddr_un addr; mode_t oldmask; if (!sock) { qemudLog(QEMUD_ERR, "Failed to allocate memory for struct qemud_socket"); return -1; } sock->readonly = readonly; sock->next = server->sockets; server->sockets = sock; server->nsockets++; if ((sock->fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { qemudLog(QEMUD_ERR, "Failed to create socket: %s", strerror(errno)); return -1; } if (qemudSetCloseExec(sock->fd) < 0 || qemudSetNonBlock(sock->fd) < 0) return -1; memset(&addr, 0, sizeof(addr)); addr.sun_family = AF_UNIX; strncpy(addr.sun_path, path, sizeof(addr.sun_path)-1); if (addr.sun_path[0] == '@') addr.sun_path[0] = '\0'; if (readonly) oldmask = umask(~(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); else oldmask = umask(~(S_IRUSR | S_IWUSR)); if (bind(sock->fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) { qemudLog(QEMUD_ERR, "Failed to bind socket to '%s': %s", path, strerror(errno)); return -1; } umask(oldmask); if (listen(sock->fd, 30) < 0) { qemudLog(QEMUD_ERR, "Failed to listen for connections on '%s': %s", path, strerror(errno)); return -1; } return 0; } static int qemudInitPaths(struct qemud_server *server, int sys, char *sockname, char *roSockname, int maxlen) { const char *paths[] = { "libvirt/qemu", /* QEMUD_DIR_DOMAINS */ "libvirt/qemu/autostart", /* QEMUD_DIR_AUTO_DOMAINS */ "libvirt/qemu/networks", /* QEMUD_DIR_NETWORKS */ "libvirt/qemu/networks/autostart", /* QEMUD_DIR_AUTO_NETWORKS */ }; uid_t uid; struct passwd *pw; char base[PATH_MAX] = SYSCONF_DIR "/"; int i; uid = geteuid(); if (sys) { if (uid != 0) { qemudLog(QEMUD_ERR, "You must run the daemon as root to use system mode"); return -1; } if (snprintf(sockname, maxlen, "%s/run/libvirt/qemud-sock", LOCAL_STATE_DIR) >= maxlen) goto snprintf_error; unlink(sockname); if (snprintf(roSockname, maxlen, "%s/run/libvirt/qemud-sock-ro", LOCAL_STATE_DIR) >= maxlen) goto snprintf_error; unlink(roSockname); if (snprintf(server->logDir, PATH_MAX, "%s/log/libvirt/qemu", LOCAL_STATE_DIR) >= PATH_MAX) goto snprintf_error; } else { if (!(pw = getpwuid(uid))) { qemudLog(QEMUD_ERR, "Failed to find user record for uid '%d': %s", uid, strerror(errno)); return -1; } if (snprintf(sockname, maxlen, "@%s/.libvirt/qemud-sock", pw->pw_dir) >= maxlen) goto snprintf_error; if (snprintf(base, PATH_MAX, "%s/.", pw->pw_dir) >= PATH_MAX) goto snprintf_error; if (snprintf(server->logDir, PATH_MAX, "%s/.libvirt/qemu/log", pw->pw_dir) >= PATH_MAX) goto snprintf_error; } for (i = 0; i < QEMUD_N_CONFIG_DIRS; i++) if (snprintf(server->configDirs[i], PATH_MAX, "%s%s", base, paths[i]) >= PATH_MAX) goto snprintf_error; return 0; snprintf_error: qemudLog(QEMUD_ERR, "Resulting path to long for buffer in qemudInitPaths()"); return -1; } static struct qemud_server *qemudInitialize(int sys, int sigread) { struct qemud_server *server; char sockname[PATH_MAX]; char roSockname[PATH_MAX]; if (!(server = calloc(1, sizeof(struct qemud_server)))) { qemudLog(QEMUD_ERR, "Failed to allocate struct qemud_server"); return NULL; } /* We don't have a dom-0, so start from 1 */ server->nextvmid = 1; server->sigread = sigread; roSockname[0] = '\0'; if (qemudInitPaths(server, sys, sockname, roSockname, PATH_MAX) < 0) goto cleanup; server->configDir = server->configDirs[QEMUD_DIR_CONFIG]; server->autostartDir = server->configDirs[QEMUD_DIR_AUTOSTART]; server->networkConfigDir = server->configDirs[QEMUD_DIR_NETWORK_CONFIG]; server->networkAutostartDir = server->configDirs[QEMUD_DIR_NETWORK_AUTOSTART]; if (qemudListenUnix(server, sockname, 0) < 0) goto cleanup; if (roSockname[0] != '\0' && qemudListenUnix(server, roSockname, 1) < 0) goto cleanup; if (qemudScanConfigs(server) < 0) { goto cleanup; } return server; cleanup: if (server) { struct qemud_socket *sock = server->sockets; while (sock) { close(sock->fd); sock = sock->next; } free(server); } return NULL; } static int qemudDispatchServer(struct qemud_server *server, struct qemud_socket *sock) { int fd; struct sockaddr_storage addr; unsigned int addrlen = sizeof(addr); struct qemud_client *client; if ((fd = accept(sock->fd, (struct sockaddr *)&addr, &addrlen)) < 0) { if (errno == EAGAIN) return 0; qemudLog(QEMUD_ERR, "Failed to accept connection: %s", strerror(errno)); return -1; } if (qemudSetCloseExec(fd) < 0 || qemudSetNonBlock(fd) < 0) { close(fd); return -1; } client = calloc(1, sizeof(struct qemud_client)); client->fd = fd; client->readonly = sock->readonly; client->next = server->clients; server->clients = client; server->nclients++; return 0; } static int qemudExec(struct qemud_server *server, char **argv, int *retpid, int *outfd, int *errfd) { int pid, null; int pipeout[2] = {-1,-1}; int pipeerr[2] = {-1,-1}; if ((null = open(_PATH_DEVNULL, O_RDONLY)) < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot open %s : %s", _PATH_DEVNULL, strerror(errno)); goto cleanup; } if ((outfd != NULL && pipe(pipeout) < 0) || (errfd != NULL && pipe(pipeerr) < 0)) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot create pipe : %s", strerror(errno)); goto cleanup; } if ((pid = fork()) < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot fork child process : %s", strerror(errno)); goto cleanup; } if (pid) { /* parent */ close(null); if (outfd) { close(pipeout[1]); qemudSetNonBlock(pipeout[0]); qemudSetCloseExec(pipeout[0]); *outfd = pipeout[0]; } if (errfd) { close(pipeerr[1]); qemudSetNonBlock(pipeerr[0]); qemudSetCloseExec(pipeerr[0]); *errfd = pipeerr[0]; } *retpid = pid; return 0; } /* child */ if (pipeout[0] > 0 && close(pipeout[0]) < 0) _exit(1); if (pipeerr[0] > 0 && close(pipeerr[0]) < 0) _exit(1); if (dup2(null, STDIN_FILENO) < 0) _exit(1); if (dup2(pipeout[1] > 0 ? pipeout[1] : null, STDOUT_FILENO) < 0) _exit(1); if (dup2(pipeerr[1] > 0 ? pipeerr[1] : null, STDERR_FILENO) < 0) _exit(1); close(null); if (pipeout[1] > 0) close(pipeout[1]); if (pipeerr[1] > 0) close(pipeerr[1]); execvp(argv[0], argv); _exit(1); return 0; cleanup: if (pipeerr[0] > 0) close(pipeerr[0]); if (pipeerr[1] > 0) close(pipeerr[1]); if (pipeout[0] > 0) close(pipeout[0]); if (pipeout[1] > 0) close(pipeout[1]); if (null > 0) close(null); return -1; } /* Return -1 for error, 1 to continue reading and 0 for success */ typedef int qemudHandlerMonitorOutput(struct qemud_server *server, struct qemud_vm *vm, const char *output, int fd); static int qemudReadMonitorOutput(struct qemud_server *server, struct qemud_vm *vm, int fd, char *buffer, int buflen, qemudHandlerMonitorOutput func, const char *what) { #define MONITOR_TIMEOUT 3000 int got = 0; buffer[0] = '\0'; /* Consume & discard the initial greeting */ while (got < (buflen-1)) { int ret; ret = read(fd, buffer+got, buflen-got-1); if (ret == 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "QEMU quit during %s startup\n%s", what, buffer); return -1; } if (ret < 0) { struct pollfd pfd = { .fd = fd, .events = POLLIN }; if (errno == EINTR) continue; if (errno != EAGAIN) { qemudReportError(server, 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(server, VIR_ERR_INTERNAL_ERROR, "Timed out while reading %s startup output", what); return -1; } else if (ret == -1) { if (errno != EINTR) { qemudReportError(server, 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(server, VIR_ERR_INTERNAL_ERROR, "Failure while reading %s startup output", what); return -1; } } else { got += ret; buffer[got] = '\0'; if ((ret = func(server, vm, buffer, fd)) != 1) return ret; } } qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "Out of space while reading %s startup output", what); return -1; #undef MONITOR_TIMEOUT } static int qemudCheckMonitorPrompt(struct qemud_server *server ATTRIBUTE_UNUSED, struct qemud_vm *vm, const char *output, int fd) { if (strstr(output, "(qemu) ") == NULL) return 1; /* keep reading */ vm->monitor = fd; return 0; } static int qemudOpenMonitor(struct qemud_server *server, struct qemud_vm *vm, const char *monitor) { int monfd; char buffer[1024]; int ret = -1; if (!(monfd = open(monitor, O_RDWR))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "Unable to open monitor path %s", monitor); return -1; } if (qemudSetCloseExec(monfd) < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "Unable to set monitor close-on-exec flag"); goto error; } if (qemudSetNonBlock(monfd) < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "Unable to put monitor into non-blocking mode"); goto error; } ret = qemudReadMonitorOutput(server, vm, monfd, buffer, sizeof(buffer), qemudCheckMonitorPrompt, "monitor"); error: close(monfd); return ret; } static int qemudExtractMonitorPath(const char *haystack, char *path, int pathmax) { static const char needle[] = "char device redirected to"; char *tmp; if (!(tmp = strstr(haystack, needle))) return -1; strncpy(path, tmp+sizeof(needle), pathmax-1); path[pathmax-1] = '\0'; while (*path) { /* * The monitor path ends at first whitespace char * so lets search for it & NULL terminate it there */ if (isspace(*path)) { *path = '\0'; return 0; } path++; } /* * We found a path, but didn't find any whitespace, * so it must be still incomplete - we should at * least see a \n */ return -1; } static int qemudOpenMonitorPath(struct qemud_server *server, struct qemud_vm *vm, const char *output, int fd ATTRIBUTE_UNUSED) { char monitor[PATH_MAX]; if (qemudExtractMonitorPath(output, monitor, sizeof(monitor)) < 0) return 1; /* keep reading */ return qemudOpenMonitor(server, vm, monitor); } static int qemudWaitForMonitor(struct qemud_server *server, struct qemud_vm *vm) { char buffer[1024]; /* Plenty of space to get startup greeting */ int ret = qemudReadMonitorOutput(server, vm, vm->stderr, buffer, sizeof(buffer), qemudOpenMonitorPath, "console"); buffer[sizeof(buffer)-1] = '\0'; retry: if (write(vm->logfile, buffer, strlen(buffer)) < 0) { /* Log, but ignore failures to write logfile for VM */ if (errno == EINTR) goto retry; qemudLog(QEMUD_WARN, "Unable to log VM console data: %s", strerror(errno)); } return ret; } static int qemudNextFreeVNCPort(struct qemud_server *server 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; } int qemudStartVMDaemon(struct qemud_server *server, struct qemud_vm *vm) { char **argv = NULL, **tmp; int i, ret = -1; char logfile[PATH_MAX]; if (qemudIsActiveVM(vm)) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "VM is already active"); return -1; } if (vm->def->vncPort < 0) { int port = qemudNextFreeVNCPort(server); if (port < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "Unable to find an unused VNC port"); return -1; } vm->def->vncActivePort = port; } else vm->def->vncActivePort = vm->def->vncPort; if ((strlen(server->logDir) + /* path */ 1 + /* Separator */ strlen(vm->def->name) + /* basename */ 4 + /* suffix .log */ 1 /* NULL */) > PATH_MAX) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "config file path too long: %s/%s.log", server->logDir, vm->def->name); return -1; } strcpy(logfile, server->logDir); strcat(logfile, "/"); strcat(logfile, vm->def->name); strcat(logfile, ".log"); if (qemudEnsureDir(server->logDir) < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot create log directory %s: %s", server->logDir, strerror(errno)); return -1; } if ((vm->logfile = open(logfile, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR)) < 0) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to create logfile %s: %s", logfile, strerror(errno)); return -1; } if (qemudBuildCommandLine(server, vm, &argv) < 0) { close(vm->logfile); vm->logfile = -1; return -1; } tmp = argv; while (*tmp) { if (write(vm->logfile, *tmp, strlen(*tmp)) < 0) qemudLog(QEMUD_WARN, "Unable to write argv to logfile %d: %s", errno, strerror(errno)); if (write(vm->logfile, " ", 1) < 0) qemudLog(QEMUD_WARN, "Unable to write argv to logfile %d: %s", errno, strerror(errno)); tmp++; } if (write(vm->logfile, "\n", 1) < 0) qemudLog(QEMUD_WARN, "Unable to write argv to logfile %d: %s", errno, strerror(errno)); if (qemudExec(server, argv, &vm->pid, &vm->stdout, &vm->stderr) == 0) { vm->id = server->nextvmid++; vm->state = QEMUD_STATE_RUNNING; server->ninactivevms--; server->nactivevms++; server->nvmfds += 2; ret = 0; if (qemudWaitForMonitor(server, vm) < 0) { qemudShutdownVMDaemon(server, vm); ret = -1; } } if (vm->tapfds) { for (i = 0; vm->tapfds[i] != -1; i++) { close(vm->tapfds[i]); vm->tapfds[i] = -1; } free(vm->tapfds); vm->tapfds = NULL; vm->ntapfds = 0; } for (i = 0 ; argv[i] ; i++) free(argv[i]); free(argv); return ret; } static void qemudDispatchClientFailure(struct qemud_server *server, struct qemud_client *client) { struct qemud_client *tmp = server->clients; struct qemud_client *prev = NULL; while (tmp) { if (tmp == client) { if (prev == NULL) server->clients = client->next; else prev->next = client->next; server->nclients--; break; } prev = tmp; tmp = tmp->next; } close(client->fd); free(client); } static int qemudDispatchClientRequest(struct qemud_server *server, struct qemud_client *client) { if (qemudDispatch(server, client, &client->incoming, &client->outgoing) < 0) { return -1; } client->outgoingSent = 0; client->tx = 1; client->incomingReceived = 0; return 0; } static int qemudClientRead(struct qemud_server *server, struct qemud_client *client, char *buf, size_t want) { int ret; if ((ret = read(client->fd, buf, want)) <= 0) { qemudDebug("Plain read error %d", ret); if (!ret || errno != EAGAIN) qemudDispatchClientFailure(server, client); return -1; } qemudDebug("Plain data read %d", ret); return ret; } static void qemudDispatchClientRead(struct qemud_server *server, struct qemud_client *client) { char *data = (char *)&client->incoming; unsigned int got = client->incomingReceived; int want; int ret; restart: if (got >= sizeof(struct qemud_packet_header)) { want = sizeof(struct qemud_packet_header) + client->incoming.header.dataSize - got; } else { want = sizeof(struct qemud_packet_header) - got; } if ((ret = qemudClientRead(server, client, data+got, want)) < 0) { return; } got += ret; client->incomingReceived += ret; /* If we've finished header, move onto body */ if (client->incomingReceived == sizeof(struct qemud_packet_header)) { qemudDebug("Type %d, data %d", client->incoming.header.type, client->incoming.header.dataSize); /* Client lied about dataSize */ if (client->incoming.header.dataSize > sizeof(union qemud_packet_data)) { qemudDebug("Bogus data size %u", client->incoming.header.dataSize); qemudDispatchClientFailure(server, client); return; } if (client->incoming.header.dataSize) { qemudDebug("- Restarting recv to process body (%d bytes)", client->incoming.header.dataSize); goto restart; } } /* If we've finished body, dispatch the request */ if (ret == want) { if (qemudDispatchClientRequest(server, client) < 0) qemudDispatchClientFailure(server, client); qemudDebug("Dispatch"); } } static int qemudClientWrite(struct qemud_server *server, struct qemud_client *client, char *buf, size_t want) { int ret; if ((ret = write(client->fd, buf, want)) < 0) { qemudDebug("Plain write error %d", ret); if (errno != EAGAIN) qemudDispatchClientFailure(server, client); return -1; } qemudDebug("Plain data write %d", ret); return ret; } static void qemudDispatchClientWrite(struct qemud_server *server, struct qemud_client *client) { char *data = (char *)&client->outgoing; int sent = client->outgoingSent; int todo = sizeof(struct qemud_packet_header) + client->outgoing.header.dataSize - sent; int ret; if ((ret = qemudClientWrite(server, client, data+sent, todo)) < 0) { return; } client->outgoingSent += ret; qemudDebug("Done %d %d", todo, ret); if (todo == ret) client->tx = 0; } static int qemudVMData(struct qemud_server *server ATTRIBUTE_UNUSED, struct qemud_vm *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'; retry: if (write(vm->logfile, buf, ret) < 0) { /* Log, but ignore failures to write logfile for VM */ if (errno == EINTR) goto retry; qemudLog(QEMUD_WARN, "Unable to log VM console data: %s", strerror(errno)); } } } int qemudShutdownVMDaemon(struct qemud_server *server, struct qemud_vm *vm) { if (!qemudIsActiveVM(vm)) return 0; qemudLog(QEMUD_INFO, "Shutting down VM '%s'", vm->def->name); kill(vm->pid, SIGTERM); qemudVMData(server, vm, vm->stdout); qemudVMData(server, vm, vm->stderr); if (close(vm->logfile) < 0) qemudLog(QEMUD_WARN, "Unable to close logfile %d: %s", errno, strerror(errno)); close(vm->stdout); close(vm->stderr); if (vm->monitor != -1) close(vm->monitor); vm->logfile = -1; vm->stdout = -1; vm->stderr = -1; vm->monitor = -1; server->nvmfds -= 2; if (waitpid(vm->pid, NULL, WNOHANG) != vm->pid) { kill(vm->pid, SIGKILL); if (waitpid(vm->pid, NULL, 0) != vm->pid) { qemudLog(QEMUD_WARN, "Got unexpected pid, damn"); } } vm->pid = -1; vm->id = -1; vm->state = QEMUD_STATE_STOPPED; if (vm->newDef) { qemudFreeVMDef(vm->def); vm->def = vm->newDef; vm->newDef = NULL; } server->nactivevms--; server->ninactivevms++; return 0; } static int qemudDispatchVMLog(struct qemud_server *server, struct qemud_vm *vm, int fd) { if (qemudVMData(server, vm, fd) < 0) if (qemudShutdownVMDaemon(server, vm) < 0) return -1; return 0; } static int qemudDispatchVMFailure(struct qemud_server *server, struct qemud_vm *vm, int fd ATTRIBUTE_UNUSED) { if (qemudShutdownVMDaemon(server, vm) < 0) return -1; return 0; } static int qemudBuildDnsmasqArgv(struct qemud_server *server, struct qemud_network *network, char ***argv) { int i, len; char buf[PATH_MAX]; struct qemud_dhcp_range_def *range; len = 1 + /* dnsmasq */ 1 + /* --keep-in-foreground */ 1 + /* --strict-order */ 1 + /* --bind-interfaces */ 2 + /* --pid-file "" */ 2 + /* --conf-file "" */ /*2 + *//* --interface virbr0 */ 2 + /* --except-interface lo */ 2 + /* --listen-address 10.0.0.1 */ 1 + /* --dhcp-leasefile=path */ (2 * network->def->nranges) + /* --dhcp-range 10.0.0.2,10.0.0.254 */ 1; /* NULL */ if (!(*argv = calloc(len, sizeof(char *)))) goto no_memory; #define APPEND_ARG(v, n, s) do { \ if (!((v)[(n)] = strdup(s))) \ goto no_memory; \ } while (0) i = 0; APPEND_ARG(*argv, i++, "dnsmasq"); APPEND_ARG(*argv, i++, "--keep-in-foreground"); /* * Needed to ensure dnsmasq uses same algorithm for processing * multiple nameserver entries in /etc/resolv.conf as GLibC. */ APPEND_ARG(*argv, i++, "--strict-order"); APPEND_ARG(*argv, i++, "--bind-interfaces"); APPEND_ARG(*argv, i++, "--pid-file"); APPEND_ARG(*argv, i++, ""); APPEND_ARG(*argv, i++, "--conf-file"); APPEND_ARG(*argv, i++, ""); /* * XXX does not actually work, due to some kind of * race condition setting up ipv6 addresses on the * interface. A sleep(10) makes it work, but that's * clearly not practical * * APPEND_ARG(*argv, i++, "--interface"); * APPEND_ARG(*argv, i++, network->def->bridge); */ APPEND_ARG(*argv, i++, "--listen-address"); APPEND_ARG(*argv, i++, network->def->ipAddress); APPEND_ARG(*argv, i++, "--except-interface"); APPEND_ARG(*argv, i++, "lo"); /* * NB, dnsmasq command line arg bug means we need to * use a single arg '--dhcp-leasefile=path' rather than * two separate args in '--dhcp-leasefile path' style */ snprintf(buf, sizeof(buf), "--dhcp-leasefile=%s/lib/libvirt/dhcp-%s.leases", LOCAL_STATE_DIR, network->def->name); APPEND_ARG(*argv, i++, buf); range = network->def->ranges; while (range) { snprintf(buf, sizeof(buf), "%s,%s", range->start, range->end); APPEND_ARG(*argv, i++, "--dhcp-range"); APPEND_ARG(*argv, i++, buf); range = range->next; } #undef APPEND_ARG return 0; no_memory: if (argv) { for (i = 0; (*argv)[i]; i++) free((*argv)[i]); free(*argv); } qemudReportError(server, VIR_ERR_NO_MEMORY, "dnsmasq argv"); return -1; } static int dhcpStartDhcpDaemon(struct qemud_server *server, struct qemud_network *network) { char **argv; int ret, i; if (network->def->ipAddress[0] == '\0') { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot start dhcp daemon without IP address for server"); return -1; } argv = NULL; if (qemudBuildDnsmasqArgv(server, network, &argv) < 0) return -1; ret = qemudExec(server, argv, &network->dnsmasqPid, NULL, NULL); for (i = 0; argv[i]; i++) free(argv[i]); free(argv); return ret; } static int qemudAddIptablesRules(struct qemud_server *server, struct qemud_network *network) { int err; if (!server->iptables && !(server->iptables = iptablesContextNew())) { qemudReportError(server, VIR_ERR_NO_MEMORY, "iptables support"); return 1; } /* allow DHCP requests through to dnsmasq */ if ((err = iptablesAddTcpInput(server->iptables, network->bridge, 67))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow DHCP requests from '%s' : %s\n", network->bridge, strerror(err)); goto err1; } if ((err = iptablesAddUdpInput(server->iptables, network->bridge, 67))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow DHCP requests from '%s' : %s\n", network->bridge, strerror(err)); goto err2; } /* allow DNS requests through to dnsmasq */ if ((err = iptablesAddTcpInput(server->iptables, network->bridge, 53))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow DNS requests from '%s' : %s\n", network->bridge, strerror(err)); goto err3; } if ((err = iptablesAddUdpInput(server->iptables, network->bridge, 53))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow DNS requests from '%s' : %s\n", network->bridge, strerror(err)); goto err4; } /* Catch all rules to block forwarding to/from bridges */ if ((err = iptablesAddForwardRejectOut(server->iptables, network->bridge))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to block outbound traffic from '%s' : %s\n", network->bridge, strerror(err)); goto err5; } if ((err = iptablesAddForwardRejectIn(server->iptables, network->bridge))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to block inbound traffic to '%s' : %s\n", network->bridge, strerror(err)); goto err6; } /* Allow traffic between guests on the same bridge */ if ((err = iptablesAddForwardAllowCross(server->iptables, network->bridge))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow cross bridge traffic on '%s' : %s\n", network->bridge, strerror(err)); goto err7; } /* The remaining rules are only needed for IP forwarding */ if (!network->def->forward) return 1; /* allow forwarding packets from the bridge interface */ if ((err = iptablesAddForwardAllowOut(server->iptables, network->def->network, network->bridge, network->def->forwardDev))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow forwarding from '%s' : %s\n", network->bridge, strerror(err)); goto err8; } /* allow forwarding packets to the bridge interface if they are part of an existing connection */ if ((err = iptablesAddForwardAllowIn(server->iptables, network->def->network, network->bridge, network->def->forwardDev))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to allow forwarding to '%s' : %s\n", network->bridge, strerror(err)); goto err9; } /* enable masquerading */ if ((err = iptablesAddForwardMasquerade(server->iptables, network->def->network, network->def->forwardDev))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to add iptables rule to enable masquerading : %s\n", strerror(err)); goto err10; } return 1; err10: iptablesRemoveForwardAllowIn(server->iptables, network->def->network, network->bridge, network->def->forwardDev); err9: iptablesRemoveForwardAllowOut(server->iptables, network->def->network, network->bridge, network->def->forwardDev); err8: iptablesRemoveForwardAllowCross(server->iptables, network->bridge); err7: iptablesRemoveForwardRejectIn(server->iptables, network->bridge); err6: iptablesRemoveForwardRejectOut(server->iptables, network->bridge); err5: iptablesRemoveUdpInput(server->iptables, network->bridge, 53); err4: iptablesRemoveTcpInput(server->iptables, network->bridge, 53); err3: iptablesRemoveUdpInput(server->iptables, network->bridge, 67); err2: iptablesRemoveTcpInput(server->iptables, network->bridge, 67); err1: return 0; } static void qemudRemoveIptablesRules(struct qemud_server *server, struct qemud_network *network) { if (network->def->forward) { iptablesRemoveForwardMasquerade(server->iptables, network->def->network, network->def->forwardDev); iptablesRemoveForwardAllowIn(server->iptables, network->def->network, network->bridge, network->def->forwardDev); iptablesRemoveForwardAllowOut(server->iptables, network->def->network, network->bridge, network->def->forwardDev); } iptablesRemoveForwardAllowCross(server->iptables, network->bridge); iptablesRemoveForwardRejectIn(server->iptables, network->bridge); iptablesRemoveForwardRejectOut(server->iptables, network->bridge); iptablesRemoveUdpInput(server->iptables, network->bridge, 53); iptablesRemoveTcpInput(server->iptables, network->bridge, 53); iptablesRemoveUdpInput(server->iptables, network->bridge, 67); iptablesRemoveTcpInput(server->iptables, network->bridge, 67); } static int qemudEnableIpForwarding(void) { #define PROC_IP_FORWARD "/proc/sys/net/ipv4/ip_forward" int fd, ret; if ((fd = open(PROC_IP_FORWARD, O_WRONLY|O_TRUNC)) == -1) return 0; if (write(fd, "1\n", 2) < 0) ret = 0; close (fd); return 1; #undef PROC_IP_FORWARD } int qemudStartNetworkDaemon(struct qemud_server *server, struct qemud_network *network) { const char *name; int err; if (qemudIsActiveNetwork(network)) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "network is already active"); return -1; } if (!server->brctl && (err = brInit(&server->brctl))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot initialize bridge support: %s", strerror(err)); return -1; } if (network->def->bridge[0] == '\0' || strchr(network->def->bridge, '%')) { name = "vnet%d"; } else { name = network->def->bridge; } if ((err = brAddBridge(server->brctl, name, network->bridge, sizeof(network->bridge)))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot create bridge '%s' : %s", name, strerror(err)); return -1; } if (network->def->ipAddress[0] && (err = brSetInetAddress(server->brctl, network->bridge, network->def->ipAddress))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot set IP address on bridge '%s' to '%s' : %s\n", network->bridge, network->def->ipAddress, strerror(err)); goto err_delbr; } if (network->def->netmask[0] && (err = brSetInetNetmask(server->brctl, network->bridge, network->def->netmask))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "cannot set netmask on bridge '%s' to '%s' : %s\n", network->bridge, network->def->netmask, strerror(err)); goto err_delbr; } if (network->def->ipAddress[0] && (err = brSetInterfaceUp(server->brctl, network->bridge, 1))) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to bring the bridge '%s' up : %s\n", network->bridge, strerror(err)); goto err_delbr; } if (!qemudAddIptablesRules(server, network)) goto err_delbr1; if (network->def->forward && !qemudEnableIpForwarding()) { qemudReportError(server, VIR_ERR_INTERNAL_ERROR, "failed to enable IP forwarding : %s\n", strerror(err)); goto err_delbr2; } if (network->def->ranges && dhcpStartDhcpDaemon(server, network) < 0) goto err_delbr2; network->active = 1; server->ninactivenetworks--; server->nactivenetworks++; return 0; err_delbr2: qemudRemoveIptablesRules(server, network); err_delbr1: if (network->def->ipAddress[0] && (err = brSetInterfaceUp(server->brctl, network->bridge, 0))) { qemudLog(QEMUD_WARN, "Failed to bring down bridge '%s' : %s", network->bridge, strerror(err)); } err_delbr: if ((err = brDeleteBridge(server->brctl, network->bridge))) { qemudLog(QEMUD_WARN, "Failed to delete bridge '%s' : %s\n", network->bridge, strerror(err)); } return -1; } int qemudShutdownNetworkDaemon(struct qemud_server *server, struct qemud_network *network) { int err; qemudLog(QEMUD_INFO, "Shutting down network '%s'", network->def->name); if (!qemudIsActiveNetwork(network)) return 0; if (network->dnsmasqPid > 0) kill(network->dnsmasqPid, SIGTERM); qemudRemoveIptablesRules(server, network); if (network->def->ipAddress[0] && (err = brSetInterfaceUp(server->brctl, network->bridge, 0))) { qemudLog(QEMUD_WARN, "Failed to bring down bridge '%s' : %s\n", network->bridge, strerror(err)); } if ((err = brDeleteBridge(server->brctl, network->bridge))) { qemudLog(QEMUD_WARN, "Failed to delete bridge '%s' : %s\n", network->bridge, strerror(err)); } if (network->dnsmasqPid > 0 && waitpid(network->dnsmasqPid, NULL, WNOHANG) != network->dnsmasqPid) { kill(network->dnsmasqPid, SIGKILL); if (waitpid(network->dnsmasqPid, NULL, 0) != network->dnsmasqPid) qemudLog(QEMUD_WARN, "Got unexpected pid for dnsmasq\n"); } network->bridge[0] = '\0'; network->dnsmasqPid = -1; network->active = 0; if (network->newDef) { qemudFreeNetworkDef(network->def); network->def = network->newDef; network->newDef = NULL; } server->nactivenetworks--; server->ninactivenetworks++; return 0; } static int qemudDispatchPoll(struct qemud_server *server, struct pollfd *fds) { struct qemud_socket *sock = server->sockets; struct qemud_client *client = server->clients; struct qemud_vm *vm; struct qemud_network *network; int ret = 0; int fd = 0; if (fds[fd++].revents && qemudDispatchSignal(server) < 0) return -1; if (server->shutdown) return 0; vm = server->vms; while (vm) { struct qemud_vm *next = vm->next; int failed = 0, stdoutfd = vm->stdout, stderrfd = vm->stderr; if (!qemudIsActiveVM(vm)) { vm = next; continue; } if (stdoutfd != -1) { if (fds[fd].revents) { if (fds[fd].revents == POLLIN) { if (qemudDispatchVMLog(server, vm, fds[fd].fd) < 0) failed = 1; } else { if (qemudDispatchVMFailure(server, vm, fds[fd].fd) < 0) failed = 1; } } fd++; } if (stderrfd != -1) { if (!failed) { if (fds[fd].revents) { if (fds[fd].revents == POLLIN) { if (qemudDispatchVMLog(server, vm, fds[fd].fd) < 0) failed = 1; } else { if (qemudDispatchVMFailure(server, vm, fds[fd].fd) < 0) failed = 1; } } } fd++; } vm = next; if (failed) ret = -1; /* FIXME: the daemon shouldn't exit on failure here */ } while (client) { struct qemud_client *next = client->next; if (fds[fd].revents) { qemudDebug("Poll data normal"); if (fds[fd].revents == POLLOUT) qemudDispatchClientWrite(server, client); else if (fds[fd].revents == POLLIN) qemudDispatchClientRead(server, client); else qemudDispatchClientFailure(server, client); } fd++; client = next; } while (sock) { struct qemud_socket *next = sock->next; /* FIXME: the daemon shouldn't exit on error here */ if (fds[fd].revents) if (qemudDispatchServer(server, sock) < 0) return -1; fd++; sock = next; } /* Cleanup any VMs which shutdown & dont have an associated config file */ vm = server->vms; while (vm) { struct qemud_vm *next = vm->next; if (!qemudIsActiveVM(vm) && !vm->configFile[0]) qemudRemoveInactiveVM(server, vm); vm = next; } /* Cleanup any networks too */ network = server->networks; while (network) { struct qemud_network *next = network->next; if (!qemudIsActiveNetwork(network) && !network->configFile[0]) qemudRemoveInactiveNetwork(server, network); network = next; } return ret; } static void qemudPreparePoll(struct qemud_server *server, struct pollfd *fds) { int fd = 0; struct qemud_socket *sock; struct qemud_client *client; struct qemud_vm *vm; fds[fd].fd = server->sigread; fds[fd].events = POLLIN; fd++; for (vm = server->vms ; vm ; vm = vm->next) { if (!qemudIsActiveVM(vm)) continue; if (vm->stdout != -1) { fds[fd].fd = vm->stdout; fds[fd].events = POLLIN | POLLERR | POLLHUP; fd++; } if (vm->stderr != -1) { fds[fd].fd = vm->stderr; fds[fd].events = POLLIN | POLLERR | POLLHUP; fd++; } } for (client = server->clients ; client ; client = client->next) { fds[fd].fd = client->fd; /* Refuse to read more from client if tx is pending to rate limit */ if (client->tx) fds[fd].events = POLLOUT | POLLERR | POLLHUP; else fds[fd].events = POLLIN | POLLERR | POLLHUP; fd++; } for (sock = server->sockets ; sock ; sock = sock->next) { fds[fd].fd = sock->fd; fds[fd].events = POLLIN; fd++; } } static int qemudOneLoop(struct qemud_server *server, int timeout) { int nfds = server->nsockets + server->nclients + server->nvmfds + 1; /* server->sigread */ struct pollfd fds[nfds]; int thistimeout = -1; int ret; sig_atomic_t errors; /* If we have no clients or vms, then timeout after 30 seconds, letting daemon exit */ if (timeout > 0 && !server->nclients && !server->nactivevms) thistimeout = timeout; qemudPreparePoll(server, fds); retry: if ((ret = poll(fds, nfds, thistimeout * 1000)) < 0) { if (errno == EINTR) { goto retry; } qemudLog(QEMUD_ERR, "Error polling on file descriptors: %s", strerror(errno)); return -1; } /* Must have timed out */ if (ret == 0) { qemudLog(QEMUD_INFO, "Timed out while polling on file descriptors"); return -1; } /* Check for any signal handling errors and log them. */ errors = sig_errors; if (errors) { sig_errors -= errors; qemudLog (QEMUD_ERR, "Signal handler reported %d errors: last error: %s", errors, strerror (sig_lasterrno)); return -1; } if (qemudDispatchPoll(server, fds) < 0) return -1; return 0; } static int qemudRunLoop(struct qemud_server *server, int timeout) { int ret; while ((ret = qemudOneLoop(server, timeout)) == 0 && !server->shutdown) ; return ret == -1 ? -1 : 0; } static void qemudCleanup(struct qemud_server *server) { struct qemud_socket *sock; close(server->sigread); sock = server->sockets; while (sock) { struct qemud_socket *next = sock->next; close(sock->fd); free(sock); sock = next; } if (server->brctl) brShutdown(server->brctl); if (server->iptables) iptablesContextFree(server->iptables); free(server); } /* Print command-line usage. */ static void usage (const char *argv0) { fprintf (stderr, "\n" "Usage:\n" " %s [options]\n" "\n" "Options:\n" " -v | --verbose Verbose messages.\n" " -d | --daemon Run as a daemon & write PID file.\n" " -s | --system Run as system daemon.\n" " -t | --timeout Exit after timeout period.\n" " -p | --pid-file Change name of PID file.\n" "\n" "Notes:\n" "\n" "For '--system' option you must be running this daemon as root.\n" "\n" "The '--timeout' applies only when the daemon is not servicing\n" "clients.\n" "\n" "Default paths:\n" "\n" " Sockets (in system mode):\n" " " LOCAL_STATE_DIR "/run/libvirt/qemud-sock\n" " " LOCAL_STATE_DIR "/run/libvirt/qemud-sock-ro\n" "\n" " Sockets (not in system mode):\n" " $HOME/.libvirt/qemud-sock (in Unix abstract namespace)\n" "\n" " PID file (unless overridden by --pid-file):\n" " " QEMUD_PID_FILE "\n" "\n", argv0); } #define MAX_LISTEN 5 int main(int argc, char **argv) { int sys = 0; int timeout = -1; struct qemud_server *server; struct sigaction sig_action; int sigpipe[2]; char *pid_file = NULL; int ret = 1; struct option opts[] = { { "verbose", no_argument, &verbose, 1}, { "daemon", no_argument, &godaemon, 1}, { "system", no_argument, &sys, 1}, { "timeout", required_argument, NULL, 't'}, { "pid-file", required_argument, NULL, 'p'}, { "help", no_argument, NULL, '?' }, {0, 0, 0, 0} }; while (1) { int optidx = 0; int c; char *tmp; c = getopt_long(argc, argv, "vsdt:p:", opts, &optidx); if (c == -1) { break; } switch (c) { case 0: /* Got one of the flags */ break; case 'v': verbose = 1; break; case 'd': godaemon = 1; break; case 's': sys = 1; break; case 't': timeout = strtol(optarg, &tmp, 10); if (!tmp) timeout = -1; if (timeout <= 0) timeout = -1; break; case 'p': pid_file = strdup(optarg); break; case '?': usage (argv[0]); return 2; default: abort(); } } if (godaemon) openlog("libvirt-qemud", 0, 0); if (pipe(sigpipe) < 0 || qemudSetNonBlock(sigpipe[0]) < 0 || qemudSetNonBlock(sigpipe[1]) < 0) { qemudLog(QEMUD_ERR, "Failed to create pipe: %s", strerror(errno)); goto error1; } sigwrite = sigpipe[1]; sig_action.sa_handler = sig_handler; sig_action.sa_flags = 0; sigemptyset(&sig_action.sa_mask); sigaction(SIGHUP, &sig_action, NULL); sigaction(SIGINT, &sig_action, NULL); sigaction(SIGQUIT, &sig_action, NULL); sigaction(SIGTERM, &sig_action, NULL); sigaction(SIGCHLD, &sig_action, NULL); sig_action.sa_handler = SIG_IGN; sigaction(SIGPIPE, &sig_action, NULL); if (godaemon) { int pid = qemudGoDaemon(); if (pid < 0) { qemudLog(QEMUD_ERR, "Failed to fork as daemon: %s", strerror(errno)); goto error1; } if (pid > 0) goto out; if (qemudWritePidFile(pid_file ? pid_file : QEMUD_PID_FILE) < 0) goto error1; } if (!(server = qemudInitialize(sys, sigpipe[0]))) { ret = 2; goto error2; } qemudRunLoop(server, timeout); qemudCleanup(server); close(sigwrite); if (godaemon) closelog(); out: ret = 0; error2: if (godaemon) unlink(pid_file ? pid_file : QEMUD_PID_FILE); error1: if (pid_file) free(pid_file); return ret; } /* * Local variables: * indent-tabs-mode: nil * c-indent-level: 4 * c-basic-offset: 4 * tab-width: 4 * End: */