#include "list.h"
#include "udev.h"
-#include "udev_lib.h"
#include "udev_version.h"
+#include "udev_utils.h"
#include "udevd.h"
#include "logging.h"
/* forks event and removes event from run queue when finished */
static void udev_run(struct hotplug_msg *msg)
{
+ char *const argv[] = { "udev", msg->subsystem, NULL };
pid_t pid;
pid = fork();
case 0:
/* child */
close(udevsendsock);
- execle(udev_bin, "udev", msg->subsystem, NULL, msg->envp);
+ logging_close();
+ execve(udev_bin, argv, msg->envp);
dbg("exec of child failed");
_exit(1);
break;
}
}
-/* returns already running task with devpath */
+/* returns still running task for the same event sequence */
static struct hotplug_msg *running_with_devpath(struct hotplug_msg *msg)
{
struct hotplug_msg *loop_msg;
- list_for_each_entry(loop_msg, &running_list, list)
- if (strncmp(loop_msg->devpath, msg->devpath, sizeof(loop_msg->devpath)) == 0)
- return loop_msg;
+ int i;
+
+ list_for_each_entry(loop_msg, &running_list, list) {
+ if (loop_msg->devpath == NULL || msg->devpath == NULL)
+ continue;
+
+ /* is a parent or child device event still running */
+ for (i = 0; i < DEVPATH_SIZE; i++) {
+ if (loop_msg->devpath[i] == '\0' || msg->devpath[i] == '\0')
+ return loop_msg;
+
+ if (loop_msg->devpath[i] != msg->devpath[i])
+ break;
+ }
+
+ /* is the physical device event still running on an add sequence */
+ if (msg->physdevpath && msg->action && strcmp(msg->action, "add") == 0)
+ for (i = 0; i < DEVPATH_SIZE; i++) {
+ if (loop_msg->devpath[i] == '\0' || msg->physdevpath[i] == '\0')
+ return loop_msg;
+
+ if (loop_msg->devpath[i] != msg->physdevpath[i])
+ break;
+ }
+ }
+
return NULL;
}
-/* exec queue management routine executes the events and delays events for the same devpath */
+/* exec queue management routine executes the events and serializes events in the same sequence */
static void exec_queue_manager(void)
{
struct hotplug_msg *loop_msg;
udev_run(loop_msg);
dbg("moved seq %llu to running list", loop_msg->seqnum);
} else {
- dbg("delay seq %llu, cause seq %llu already working on '%s'",
- loop_msg->seqnum, msg->seqnum, msg->devpath);
+ dbg("delay seq %llu (%s), cause seq %llu (%s) is still running",
+ loop_msg->seqnum, loop_msg->devpath, msg->seqnum, msg->devpath);
}
}
}
/* copy environment buffer and reconstruct envp */
memcpy(msg->envbuf, usend_msg.envbuf, envbuf_size);
bufpos = 0;
- for (i = 0; (bufpos < envbuf_size) && (i < HOTPLUG_NUM_ENVP-1); i++) {
+ for (i = 0; (bufpos < envbuf_size) && (i < HOTPLUG_NUM_ENVP-2); i++) {
int keylen;
char *key;
if (strncmp(key, "SEQNUM=", 7) == 0)
msg->seqnum = strtoull(&key[7], NULL, 10);
+
+ if (strncmp(key, "PHYSDEVPATH=", 12) == 0)
+ msg->physdevpath = &key[12];
}
+ msg->envp[i++] = "MANAGED_EVENT=1";
msg->envp[i] = NULL;
/* if no seqnum is given, we move straight to exec queue */
if (getuid() != 0) {
dbg("need to be root, exit");
- _exit(1);
+ goto exit;
}
/* make sure we don't lock any path */
fd = open( "/dev/null", O_RDWR );
if ( fd < 0 ) {
dbg("error opening /dev/null %s", strerror(errno));
- exit(1);
+ goto exit;
}
dup2(fd, 0);
dup2(fd, 1);
retval = pipe(pipefds);
if (retval < 0) {
dbg("error getting pipes: %s", strerror(errno));
- exit(1);
+ goto exit;
}
retval = fcntl(pipefds[0], F_SETFL, O_NONBLOCK);
if (retval < 0) {
dbg("error fcntl on read pipe: %s", strerror(errno));
- exit(1);
+ goto exit;
}
retval = fcntl(pipefds[0], F_SETFD, FD_CLOEXEC);
if (retval < 0) {
dbg("error fcntl on read pipe: %s", strerror(errno));
- exit(1);
+ goto exit;
}
retval = fcntl(pipefds[1], F_SETFL, O_NONBLOCK);
if (retval < 0) {
dbg("error fcntl on write pipe: %s", strerror(errno));
- exit(1);
+ goto exit;
}
retval = fcntl(pipefds[1], F_SETFD, FD_CLOEXEC);
if (retval < 0) {
dbg("error fcntl on write pipe: %s", strerror(errno));
- exit(1);
+ goto exit;
}
/* set signal handlers */
udevsendsock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (udevsendsock == -1) {
dbg("error getting socket, exit");
- exit(1);
+ goto exit;
}
/* the bind takes care of ensuring only one copy running */
retval = bind(udevsendsock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
dbg("bind failed, exit");
+ close(udevsendsock);
goto exit;
}
exec_queue_manager();
}
}
+
exit:
- close(udevsendsock);
logging_close();
return 1;
}