chiark / gitweb /
Remove src/tty-ask-password-agent
[elogind.git] / src / udev / udevd.c
index 009e395..8eaf2cd 100644 (file)
 #include <stdlib.h>
 #include <stdbool.h>
 #include <string.h>
-#include <ctype.h>
 #include <fcntl.h>
-#include <time.h>
 #include <getopt.h>
-#include <dirent.h>
 #include <sys/file.h>
 #include <sys/time.h>
 #include <sys/prctl.h>
 #include <sys/socket.h>
-#include <sys/un.h>
 #include <sys/signalfd.h>
 #include <sys/epoll.h>
 #include <sys/mount.h>
-#include <sys/poll.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include <sys/inotify.h>
-#include <sys/utsname.h>
 
 #include "sd-daemon.h"
 #include "rtnl-util.h"
@@ -89,6 +83,7 @@ struct event {
         struct udev_list_node node;
         struct udev *udev;
         struct udev_device *dev;
+        struct udev_device *dev_kernel;
         enum event_state state;
         int exitcode;
         unsigned long long int delaying_seqnum;
@@ -139,6 +134,7 @@ static inline struct worker *node_to_worker(struct udev_list_node *node) {
 static void event_queue_delete(struct event *event) {
         udev_list_node_remove(&event->node);
         udev_device_unref(event->dev);
+        udev_device_unref(event->dev_kernel);
         free(event);
 }
 
@@ -158,7 +154,7 @@ static void worker_unref(struct worker *worker) {
         worker->refcount--;
         if (worker->refcount > 0)
                 return;
-        log_debug("worker [%u] cleaned up", worker->pid);
+        log_debug("worker ["PID_FMT"] cleaned up", worker->pid);
         worker_cleanup(worker);
 }
 
@@ -295,7 +291,7 @@ static void worker_new(struct event *event) {
                                         fd_lock = open(udev_device_get_devnode(d), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
                                         if (fd_lock >= 0 && flock(fd_lock, LOCK_SH|LOCK_NB) < 0) {
                                                 log_debug_errno(errno, "Unable to flock(%s), skipping event handling: %m", udev_device_get_devnode(d));
-                                                err = -EWOULDBLOCK;
+                                                err = -EAGAIN;
                                                 fd_lock = safe_close(fd_lock);
                                                 goto skip;
                                         }
@@ -414,7 +410,7 @@ out:
                 event->state = EVENT_RUNNING;
                 udev_list_node_append(&worker->node, &worker_list);
                 children++;
-                log_debug("seq %llu forked new worker [%u]", udev_device_get_seqnum(event->dev), pid);
+                log_debug("seq %llu forked new worker ["PID_FMT"]", udev_device_get_seqnum(event->dev), pid);
                 break;
         }
 }
@@ -431,7 +427,8 @@ static void event_run(struct event *event) {
 
                 count = udev_monitor_send_device(monitor, worker->monitor, event->dev);
                 if (count < 0) {
-                        log_error_errno(errno, "worker [%u] did not accept message %zi (%m), kill it", worker->pid, count);
+                        log_error_errno(errno, "worker ["PID_FMT"] did not accept message %zi (%m), kill it",
+                                        worker->pid, count);
                         kill(worker->pid, SIGKILL);
                         worker->state = WORKER_KILLED;
                         continue;
@@ -464,6 +461,8 @@ static int event_queue_insert(struct udev_device *dev) {
 
         event->udev = udev_device_get_udev(dev);
         event->dev = dev;
+        event->dev_kernel = udev_device_shallow_clone(dev);
+        udev_device_copy_properties(event->dev_kernel, dev);
         event->seqnum = udev_device_get_seqnum(dev);
         event->devpath = udev_device_get_devpath(dev);
         event->devpath_len = strlen(event->devpath);
@@ -869,28 +868,33 @@ static void handle_signal(struct udev *udev, int signo) {
 
                                 if (worker->pid != pid)
                                         continue;
-                                log_debug("worker [%u] exit", pid);
+                                log_debug("worker ["PID_FMT"] exit", pid);
 
                                 if (WIFEXITED(status)) {
                                         if (WEXITSTATUS(status) != 0)
-                                                log_error("worker [%u] exit with return code %i",
+                                                log_error("worker ["PID_FMT"] exit with return code %i",
                                                           pid, WEXITSTATUS(status));
                                 } else if (WIFSIGNALED(status)) {
-                                        log_error("worker [%u] terminated by signal %i (%s)",
+                                        log_error("worker ["PID_FMT"] terminated by signal %i (%s)",
                                                   pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
                                 } else if (WIFSTOPPED(status)) {
-                                        log_error("worker [%u] stopped", pid);
+                                        log_error("worker ["PID_FMT"] stopped", pid);
                                 } else if (WIFCONTINUED(status)) {
-                                        log_error("worker [%u] continued", pid);
+                                        log_error("worker ["PID_FMT"] continued", pid);
                                 } else {
-                                        log_error("worker [%u] exit with status 0x%04x", pid, status);
+                                        log_error("worker ["PID_FMT"] exit with status 0x%04x", pid, status);
                                 }
 
                                 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
                                         if (worker->event) {
-                                                log_error("worker [%u] failed while handling '%s'",
+                                                log_error("worker ["PID_FMT"] failed while handling '%s'",
                                                           pid, worker->event->devpath);
                                                 worker->event->exitcode = -32;
+                                                /* delete state from disk */
+                                                udev_device_delete_db(worker->event->dev);
+                                                udev_device_tag_index(worker->event->dev, NULL, false);
+                                                /* forward kernel event without ammending it */
+                                                udev_monitor_send_device(monitor, NULL, worker->event->dev_kernel);
                                                 event_queue_delete(worker->event);
 
                                                 /* drop reference taken for state 'running' */
@@ -908,6 +912,20 @@ static void handle_signal(struct udev *udev, int signo) {
         }
 }
 
+static void event_queue_update(void) {
+        int r;
+
+        if (!udev_list_node_is_empty(&event_list)) {
+                r = touch("/run/udev/queue");
+                if (r < 0)
+                        log_warning_errno(r, "could not touch /run/udev/queue: %m");
+        } else {
+                r = unlink("/run/udev/queue");
+                if (r < 0 && errno != ENOENT)
+                        log_warning("could not unlink /run/udev/queue: %m");
+        }
+}
+
 static int systemd_fds(struct udev *udev, int *rctrl, int *rnetlink) {
         int ctrl = -1, netlink = -1;
         int fd, n;
@@ -1368,15 +1386,7 @@ int main(int argc, char *argv[]) {
                 }
 
                 /* tell settle that we are busy or idle */
-                if (!udev_list_node_is_empty(&event_list)) {
-                        int fd;
-
-                        fd = open("/run/udev/queue", O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
-                        if (fd >= 0)
-                                close(fd);
-                } else {
-                        unlink("/run/udev/queue");
-                }
+                event_queue_update();
 
                 fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout);
                 if (fdcount < 0)
@@ -1409,18 +1419,14 @@ int main(int argc, char *argv[]) {
 
                                 if ((ts - worker->event_start_usec) > arg_event_timeout_warn_usec) {
                                         if ((ts - worker->event_start_usec) > arg_event_timeout_usec) {
-                                                log_error("worker [%u] %s timeout; kill it", worker->pid, worker->event->devpath);
+                                                log_error("worker ["PID_FMT"] %s timeout; kill it", worker->pid, worker->event->devpath);
                                                 kill(worker->pid, SIGKILL);
                                                 worker->state = WORKER_KILLED;
 
-                                                /* drop reference taken for state 'running' */
-                                                worker_unref(worker);
                                                 log_error("seq %llu '%s' killed", udev_device_get_seqnum(worker->event->dev), worker->event->devpath);
                                                 worker->event->exitcode = -64;
-                                                event_queue_delete(worker->event);
-                                                worker->event = NULL;
                                         } else if (!worker->event_warned) {
-                                                log_warning("worker [%u] %s is taking a long time", worker->pid, worker->event->devpath);
+                                                log_warning("worker ["PID_FMT"] %s is taking a long time", worker->pid, worker->event->devpath);
                                                 worker->event_warned = true;
                                         }
                                 }
@@ -1468,8 +1474,8 @@ int main(int argc, char *argv[]) {
                         struct udev_device *dev;
 
                         dev = udev_monitor_receive_device(monitor);
-                        if (dev != NULL) {
-                                udev_device_set_usec_initialized(dev, now(CLOCK_MONOTONIC));
+                        if (dev) {
+                                udev_device_ensure_usec_initialized(dev, NULL);
                                 if (event_queue_insert(dev) < 0)
                                         udev_device_unref(dev);
                         }
@@ -1501,6 +1507,11 @@ int main(int argc, char *argv[]) {
                 if (is_inotify)
                         handle_inotify(udev);
 
+                /* tell settle that we are busy or idle, this needs to be before the
+                 * PING handling
+                 */
+                event_queue_update();
+
                 /*
                  * This needs to be after the inotify handling, to make sure,
                  * that the ping is send back after the possibly generated