udevd: create /dev/.udev/rules.d/ before watching it wit inotify

[elogind.git] / udev / udevd.c

diff --git a/udev/udevd.c b/udev/udevd.c
index 62c643668c8be96f7f26a59e90b8819d221ad619..72f9b180d398d37294a8511ad6c9bd72ee045cd3 100644 (file)
--- a/udev/udevd.c
+++ b/udev/udevd.c
@@ -118,6 +118,8 @@ struct event {
        const char *devpath;
        size_t devpath_len;
        const char *devpath_old;
+       dev_t devnum;
+       bool is_block;
 };
 
 static struct event *node_to_event(struct udev_list_node *node)
@@ -221,7 +223,6 @@ static void worker_new(struct event *event)
        /* allow the main daemon netlink address to send devices to the worker */
        udev_monitor_allow_unicast_sender(worker_monitor, monitor);
        udev_monitor_enable_receiving(worker_monitor);
-       util_set_fd_cloexec(udev_monitor_get_fd(worker_monitor));
 
        worker = calloc(1, sizeof(struct worker));
        if (worker == NULL)
@@ -410,6 +411,8 @@ static void event_queue_insert(struct udev_device *dev)
        event->devpath = udev_device_get_devpath(dev);
        event->devpath_len = strlen(event->devpath);
        event->devpath_old = udev_device_get_devpath_old(dev);
+       event->devnum = udev_device_get_devnum(dev);
+       event->is_block = (strcmp("block", udev_device_get_subsystem(dev)) == 0);
 
        udev_queue_export_device_queued(udev_queue_export, dev);
        info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev),
@@ -473,7 +476,7 @@ static int mem_size_mb(void)
 }
 
 /* lookup event for identical, parent, child device */
-static int devpath_busy(struct event *event)
+static bool is_devpath_busy(struct event *event)
 {
        struct udev_list_node *loop;
        size_t common;
@@ -488,18 +491,21 @@ static int devpath_busy(struct event *event)
 
                /* event we checked earlier still exists, no need to check again */
                if (loop_event->seqnum == event->delaying_seqnum)
-                       return 2;
+                       return true;
 
                /* found ourself, no later event can block us */
                if (loop_event->seqnum >= event->seqnum)
                        break;
 
+               /* check major/minor */
+               if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)
+                       return true;
+
                /* check our old name */
-               if (event->devpath_old != NULL)
-                       if (strcmp(loop_event->devpath, event->devpath_old) == 0) {
-                               event->delaying_seqnum = loop_event->seqnum;
-                               return 3;
-                       }
+               if (event->devpath_old != NULL && strcmp(loop_event->devpath, event->devpath_old) == 0) {
+                       event->delaying_seqnum = loop_event->seqnum;
+                       return true;
+               }
 
                /* compare devpath */
                common = MIN(loop_event->devpath_len, event->devpath_len);
@@ -511,26 +517,26 @@ static int devpath_busy(struct event *event)
                /* identical device event found */
                if (loop_event->devpath_len == event->devpath_len) {
                        event->delaying_seqnum = loop_event->seqnum;
-                       return 4;
+                       return true;
                }
 
                /* parent device event found */
                if (event->devpath[common] == '/') {
                        event->delaying_seqnum = loop_event->seqnum;
-                       return 5;
+                       return true;
                }
 
                /* child device event found */
                if (loop_event->devpath[common] == '/') {
                        event->delaying_seqnum = loop_event->seqnum;
-                       return 6;
+                       return true;
                }
 
                /* no matching device */
                continue;
        }
 
-       return 0;
+       return false;
 }
 
 static void events_start(struct udev *udev)
@@ -544,7 +550,7 @@ static void events_start(struct udev *udev)
                        continue;
 
                /* do not start event if parent or child event is still running */
-               if (devpath_busy(event) != 0) {
+               if (is_devpath_busy(event)) {
                        dbg(udev, "delay seq %llu (%s)\n", event->seqnum, event->devpath);
                        continue;
                }
@@ -913,6 +919,7 @@ int main(int argc, char *argv[])
                                  IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
        } else {
                char filename[UTIL_PATH_SIZE];
+               struct stat statbuf;
 
                inotify_add_watch(pfd[FD_INOTIFY].fd, LIBEXECDIR "/rules.d",
                                  IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
@@ -921,6 +928,12 @@ int main(int argc, char *argv[])
 
                /* watch dynamic rules directory */
                util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
+               if (stat(filename, &statbuf) != 0) {
+                       util_create_path(udev, filename);
+                       udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
+                       mkdir(filename, 0755);
+                       udev_selinux_resetfscreatecon(udev);
+               }
                inotify_add_watch(pfd[FD_INOTIFY].fd, filename,
                                  IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
        }
@@ -938,14 +951,13 @@ int main(int argc, char *argv[])
        }
 
        /* unnamed socket from workers to the main daemon */
-       if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, worker_watch) < 0) {
+       if (socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, worker_watch) < 0) {
                fprintf(stderr, "error getting socketpair\n");
                err(udev, "error getting socketpair\n");
                rc = 6;
                goto exit;
        }
        pfd[FD_WORKER].fd = worker_watch[READ_END];
-       util_set_fd_cloexec(worker_watch[WRITE_END]);
 
        rules = udev_rules_new(udev, resolve_names);
        if (rules == NULL) {