Re: [libvirt] [PATCH 2/5] daemonize qemu processes

Make sure vms don't get killed when the libvirtd quits unexpectedly. Needs the previous patch since it looks at the pid file. --- src/qemu_driver.c | 36 ++++++++++++++++++++++++------------ 1 files changed, 24 insertions(+), 12 deletions(-) diff --git a/src/qemu_driver.c b/src/qemu_driver.c index a2e573e..7804094 100644 --- a/src/qemu_driver.c +++ b/src/qemu_driver.c @@ -858,6 +858,7 @@ static int qemudStartVMDaemon(virConnectPtr conn, const char *emulator; uid_t uid = geteuid(); mode_t logmode; + pid_t child; FD_ZERO(&keepfd); @@ -988,12 +989,26 @@ static int qemudStartVMDaemon(virConnectPtr conn, for (i = 0 ; i < ntapfds ; i++) FD_SET(tapfds[i], &keepfd); - ret = virExec(conn, argv, progenv, &keepfd, &vm->pid, + ret = virExec(conn, argv, progenv, &keepfd, &child, vm->stdin_fd, &vm->stdout_fd, &vm->stderr_fd, - VIR_EXEC_NONBLOCK); - if (ret == 0) + VIR_EXEC_NONBLOCK | VIR_EXEC_DAEMON); + + /* wait for qemu process to to show up */ + if (ret == 0) { + int retries = 100; + while (retries) { + if ((ret = virFileReadPid(driver->stateDir, vm->def->name, &vm->pid)) == 0) + break;

+ usleep(10*1000); + retries--; + } + if (ret) + qemudLog(QEMUD_WARN, _("Domain %s didn't show up\n"), vm->def->name); + } + + if (ret == 0) { vm->state = migrateFrom ? VIR_DOMAIN_PAUSED : VIR_DOMAIN_RUNNING; - else + } else vm->def->id = -1; for (i = 0 ; argv[i] ; i++) @@ -1069,7 +1084,9 @@ static void qemudShutdownVMDaemon(virConnectPtr conn ATTRIBUTE_UNUSED, qemudLog(QEMUD_INFO, _("Shutting down VM '%s'\n"), vm->def->name); - kill(vm->pid, SIGTERM); + if (kill(vm->pid, SIGTERM) < 0) + qemudLog(QEMUD_ERROR, _("Failed to send SIGTERM to %s (%d): %s\n"), + vm->def->name, vm->pid, strerror(errno));

qemudVMData(driver, vm, vm->stdout_fd); qemudVMData(driver, vm, vm->stderr_fd); @@ -1089,13 +1106,8 @@ static void qemudShutdownVMDaemon(virConnectPtr conn ATTRIBUTE_UNUSED, 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")); - } - } + /* shut it off for sure */ + kill(vm->pid, SIGKILL);