mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-08-26 18:41:17 +00:00
Fri Feb 16 18:26:55 IST 2007 Mark McLoughlin <markmc@redhat.com>
* qemud/internal.h, qemud/qemud.c: improve signal handling and handle SIGHUP by shutting down all guests and networks and re-loading configs, and handle SIGINT and SIGTERM by shutting down cleanly.
This commit is contained in:
parent
49dcc264e5
commit
49fe28206a
@ -1,3 +1,10 @@
|
||||
Fri Feb 16 18:26:55 IST 2007 Mark McLoughlin <markmc@redhat.com>
|
||||
|
||||
* qemud/internal.h, qemud/qemud.c: improve signal handling
|
||||
and handle SIGHUP by shutting down all guests and networks
|
||||
and re-loading configs, and handle SIGINT and SIGTERM
|
||||
by shutting down cleanly.
|
||||
|
||||
Fri Feb 16 18:24:08 IST 2007 Mark McLoughlin <markmc@redhat.com>
|
||||
|
||||
* qemud/qemud.c, qemud/bridge.c, qemud/iptables.c: fix
|
||||
|
@ -274,6 +274,7 @@ struct qemud_server {
|
||||
int qemuVersion;
|
||||
int nclients;
|
||||
struct qemud_client *clients;
|
||||
int sigread;
|
||||
int nvmfds;
|
||||
int nactivevms;
|
||||
struct qemud_vm *activevms;
|
||||
@ -290,6 +291,7 @@ struct qemud_server {
|
||||
char networkConfigDir[PATH_MAX];
|
||||
char errorMessage[QEMUD_MAX_ERROR_LEN];
|
||||
int errorCode;
|
||||
unsigned int shutdown : 1;
|
||||
};
|
||||
|
||||
int qemudStartVMDaemon(struct qemud_server *server,
|
||||
|
126
qemud/qemud.c
126
qemud/qemud.c
@ -50,9 +50,85 @@
|
||||
#include "conf.h"
|
||||
#include "iptables.h"
|
||||
|
||||
static void reapchild(int sig ATTRIBUTE_UNUSED) {
|
||||
/* We explicitly waitpid the child later */
|
||||
static int sigwrite = -1;
|
||||
|
||||
static void sig_handler(int sig) {
|
||||
unsigned char sigc = sig;
|
||||
int origerrno;
|
||||
|
||||
if (sig == SIGCHLD) /* We explicitly waitpid the child later */
|
||||
return;
|
||||
|
||||
origerrno = errno;
|
||||
write(sigwrite, &sigc, 1);
|
||||
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)
|
||||
return -1;
|
||||
|
||||
/* shutdown active VMs */
|
||||
vm = server->activevms;
|
||||
while (vm) {
|
||||
struct qemud_vm *next = vm->next;
|
||||
qemudShutdownVMDaemon(server, vm);
|
||||
vm = next;
|
||||
}
|
||||
|
||||
/* free inactive VMs */
|
||||
vm = server->inactivevms;
|
||||
while (vm) {
|
||||
struct qemud_vm *next = vm->next;
|
||||
qemudFreeVM(vm);
|
||||
vm = next;
|
||||
}
|
||||
server->inactivevms = NULL;
|
||||
server->ninactivevms = 0;
|
||||
|
||||
/* shutdown active networks */
|
||||
network = server->activenetworks;
|
||||
while (network) {
|
||||
struct qemud_network *next = network->next;
|
||||
qemudShutdownNetworkDaemon(server, network);
|
||||
network = next;
|
||||
}
|
||||
|
||||
/* free inactive networks */
|
||||
network = server->inactivenetworks;
|
||||
while (network) {
|
||||
struct qemud_network *next = network->next;
|
||||
qemudFreeNetwork(network);
|
||||
network = next;
|
||||
}
|
||||
server->inactivenetworks = NULL;
|
||||
server->ninactivenetworks = 0;
|
||||
|
||||
ret = 0;
|
||||
|
||||
switch (sigc) {
|
||||
case SIGHUP:
|
||||
ret = qemudScanConfigs(server);
|
||||
break;
|
||||
|
||||
case SIGINT:
|
||||
case SIGTERM:
|
||||
server->shutdown = 1;
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int qemudSetCloseExec(int fd) {
|
||||
int flags;
|
||||
if ((flags = fcntl(fd, F_GETFD)) < 0) {
|
||||
@ -228,7 +304,7 @@ static int qemudListen(struct qemud_server *server, int sys) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct qemud_server *qemudInitialize(int sys) {
|
||||
static struct qemud_server *qemudInitialize(int sys, int sigread) {
|
||||
struct qemud_server *server;
|
||||
char libvirtConf[PATH_MAX];
|
||||
|
||||
@ -239,6 +315,7 @@ static struct qemud_server *qemudInitialize(int sys) {
|
||||
server->qemuVersion = (0*1000000)+(8*1000)+(0);
|
||||
/* We don't have a dom-0, so start from 1 */
|
||||
server->nextvmid = 1;
|
||||
server->sigread = sigread;
|
||||
|
||||
if (sys) {
|
||||
if (snprintf(libvirtConf, sizeof(libvirtConf), "%s/libvirt", SYSCONF_DIR) >= (int)sizeof(libvirtConf)) {
|
||||
@ -1139,6 +1216,12 @@ static int qemudDispatchPoll(struct qemud_server *server, struct pollfd *fds) {
|
||||
int ret = 0;
|
||||
int fd = 0;
|
||||
|
||||
if (fds[fd++].revents && qemudDispatchSignal(server) < 0)
|
||||
return -1;
|
||||
|
||||
if (server->shutdown)
|
||||
return 0;
|
||||
|
||||
while (sock) {
|
||||
struct qemud_socket *next = sock->next;
|
||||
if (fds[fd].revents)
|
||||
@ -1247,6 +1330,10 @@ static void qemudPreparePoll(struct qemud_server *server, struct pollfd *fds) {
|
||||
struct qemud_client *client;
|
||||
struct qemud_vm *vm;
|
||||
|
||||
fds[fd].fd = server->sigread;
|
||||
fds[fd].events = POLLIN;
|
||||
fd++;
|
||||
|
||||
for (sock = server->sockets ; sock ; sock = sock->next) {
|
||||
fds[fd].fd = sock->fd;
|
||||
fds[fd].events = POLLIN;
|
||||
@ -1280,7 +1367,7 @@ static void qemudPreparePoll(struct qemud_server *server, struct pollfd *fds) {
|
||||
|
||||
|
||||
static int qemudOneLoop(struct qemud_server *server, int timeout) {
|
||||
int nfds = server->nsockets + server->nclients + server->nvmfds;
|
||||
int nfds = server->nsockets + server->nclients + server->nvmfds + 1; /* server->sigread */
|
||||
struct pollfd fds[nfds];
|
||||
int thistimeout = -1;
|
||||
int ret;
|
||||
@ -1316,7 +1403,7 @@ static int qemudOneLoop(struct qemud_server *server, int timeout) {
|
||||
static int qemudRunLoop(struct qemud_server *server, int timeout) {
|
||||
int ret;
|
||||
|
||||
while ((ret = qemudOneLoop(server, timeout)) == 0)
|
||||
while ((ret = qemudOneLoop(server, timeout)) == 0 && !server->shutdown)
|
||||
;
|
||||
|
||||
return ret == -1 ? -1 : 0;
|
||||
@ -1324,6 +1411,7 @@ static int qemudRunLoop(struct qemud_server *server, int timeout) {
|
||||
|
||||
static void qemudCleanup(struct qemud_server *server) {
|
||||
struct qemud_socket *sock = server->sockets;
|
||||
close(server->sigread);
|
||||
while (sock) {
|
||||
close(sock->fd);
|
||||
sock = sock->next;
|
||||
@ -1342,6 +1430,8 @@ int main(int argc, char **argv) {
|
||||
int sys = 0;
|
||||
int timeout = -1;
|
||||
struct qemud_server *server;
|
||||
struct sigaction sig_action;
|
||||
int sigpipe[2];
|
||||
|
||||
struct option opts[] = {
|
||||
{ "verbose", no_argument, &verbose, 1},
|
||||
@ -1392,10 +1482,24 @@ int main(int argc, char **argv) {
|
||||
}
|
||||
}
|
||||
|
||||
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
|
||||
return 3;
|
||||
if (signal(SIGCHLD, reapchild) == SIG_ERR)
|
||||
return 3;
|
||||
if (pipe(sigpipe) < 0 ||
|
||||
qemudSetNonBlock(sigpipe[0]) < 0 ||
|
||||
qemudSetNonBlock(sigpipe[1]) < 0)
|
||||
return 1;
|
||||
|
||||
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(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();
|
||||
@ -1405,13 +1509,15 @@ int main(int argc, char **argv) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (!(server = qemudInitialize(sys)))
|
||||
if (!(server = qemudInitialize(sys, sigpipe[0])))
|
||||
return 2;
|
||||
|
||||
qemudRunLoop(server, timeout);
|
||||
|
||||
qemudCleanup(server);
|
||||
|
||||
close(sigwrite);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user