#include <stdlib.h>
#include <string.h>
#include <ctype.h>
-#include <dirent.h>
#include <fcntl.h>
-#include <syslog.h>
#include <time.h>
#include <getopt.h>
+#include <dirent.h>
#include <sys/select.h>
+#include <sys/poll.h>
#include <sys/wait.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/un.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
-#include <linux/types.h>
-#include <linux/netlink.h>
#ifdef HAVE_INOTIFY
#include <sys/inotify.h>
#endif
#include "udev.h"
-#include "udev_rules.h"
#define UDEVD_PRIORITY -4
#define UDEV_PRIORITY -2
}
}
-struct udevd_uevent_msg {
- struct udev *udev;
- struct list_head node;
- pid_t pid;
- int exitstatus;
- time_t queue_time;
- char *action;
- char *devpath;
- char *subsystem;
- char *driver;
- dev_t devt;
- unsigned long long seqnum;
- char *devpath_old;
- char *physdevpath;
- unsigned int timeout;
- char *envp[UEVENT_NUM_ENVP+1];
- char envbuf[];
-};
-
static int debug_trace;
-static struct udev_rules rules;
+static struct udev_rules *rules;
static struct udev_ctrl *udev_ctrl;
-static int uevent_netlink_sock = -1;
+static struct udev_monitor *kernel_monitor;
static int inotify_fd = -1;
-
-static int signal_pipe[2] = {-1, -1};
static volatile int sigchilds_waiting;
static volatile int udev_exit;
static volatile int reload_config;
+static volatile int signal_received;
static int run_exec_q;
static int stop_exec_q;
static int max_childs;
-static char udev_log_env[32];
-
-static LIST_HEAD(exec_list);
-static LIST_HEAD(running_list);
-
-static void asmlinkage udev_event_sig_handler(int signum)
-{
- if (signum == SIGALRM)
- exit(1);
-}
-
-static int udev_event_process(struct udevd_uevent_msg *msg)
-{
- struct sigaction act;
- struct udevice *udevice;
- int i;
- int retval;
-
- /* set signal handlers */
- memset(&act, 0x00, sizeof(act));
- act.sa_handler = (void (*)(int)) udev_event_sig_handler;
- sigemptyset (&act.sa_mask);
- act.sa_flags = 0;
- sigaction(SIGALRM, &act, NULL);
-
- /* reset to default */
- act.sa_handler = SIG_DFL;
- sigaction(SIGINT, &act, NULL);
- sigaction(SIGTERM, &act, NULL);
- sigaction(SIGCHLD, &act, NULL);
- sigaction(SIGHUP, &act, NULL);
-
- /* trigger timeout to prevent hanging processes */
- alarm(UDEV_EVENT_TIMEOUT);
-
- /* reconstruct event environment from message */
- for (i = 0; msg->envp[i]; i++)
- putenv(msg->envp[i]);
-
- udevice = udev_device_init(msg->udev);
- if (udevice == NULL)
- return -1;
- util_strlcpy(udevice->action, msg->action, sizeof(udevice->action));
- sysfs_device_set_values(udevice->udev, udevice->dev, msg->devpath, msg->subsystem, msg->driver);
- udevice->devpath_old = msg->devpath_old;
- udevice->devt = msg->devt;
-
- retval = udev_device_event(&rules, udevice);
-
- /* rules may change/disable the timeout */
- if (udevice->event_timeout >= 0)
- alarm(udevice->event_timeout);
-
- /* run programs collected by RUN-key*/
- if (retval == 0 && !udevice->ignore_device && udev_get_run(msg->udev))
- retval = udev_rules_run(udevice);
-
- udev_device_cleanup(udevice);
- return retval;
-}
+static int childs;
+static struct udev_list_node event_list;
enum event_state {
EVENT_QUEUED,
EVENT_FAILED,
};
-static void export_event_state(struct udevd_uevent_msg *msg, enum event_state state)
+static struct udev_event *node_to_event(struct udev_list_node *node)
+{
+ char *event;
+
+ event = (char *)node;
+ event -= offsetof(struct udev_event, node);
+ return (struct udev_event *)event;
+}
+
+static void export_event_state(struct udev_event *event, enum event_state state)
{
char filename[UTIL_PATH_SIZE];
char filename_failed[UTIL_PATH_SIZE];
size_t start;
/* location of queue file */
- snprintf(filename, sizeof(filename), "%s/.udev/queue/%llu", udev_get_dev_path(msg->udev), msg->seqnum);
+ snprintf(filename, sizeof(filename), "%s/.udev/queue/%llu",
+ udev_get_dev_path(event->udev), udev_device_get_seqnum(event->dev));
/* location of failed file */
- util_strlcpy(filename_failed, udev_get_dev_path(msg->udev), sizeof(filename_failed));
+ util_strlcpy(filename_failed, udev_get_dev_path(event->udev), sizeof(filename_failed));
util_strlcat(filename_failed, "/", sizeof(filename_failed));
start = util_strlcat(filename_failed, ".udev/failed/", sizeof(filename_failed));
- util_strlcat(filename_failed, msg->devpath, sizeof(filename_failed));
+ util_strlcat(filename_failed, udev_device_get_devpath(event->dev), sizeof(filename_failed));
util_path_encode(&filename_failed[start], sizeof(filename_failed) - start);
switch (state) {
case EVENT_QUEUED:
- unlink(filename_failed);
- delete_path(msg->udev, filename_failed);
- create_path(msg->udev, filename);
- udev_selinux_setfscreatecon(msg->udev, filename, S_IFLNK);
- symlink(msg->devpath, filename);
- udev_selinux_resetfscreatecon(msg->udev);
+ if(unlink(filename_failed) == 0)
+ util_delete_path(event->udev, filename_failed);
+ util_create_path(event->udev, filename);
+ udev_selinux_setfscreatecon(event->udev, filename, S_IFLNK);
+ symlink(udev_device_get_devpath(event->dev), filename);
+ udev_selinux_resetfscreatecon(event->udev);
break;
case EVENT_FINISHED:
- if (msg->devpath_old != NULL) {
+ if (udev_device_get_devpath_old(event->dev) != NULL) {
/* "move" event - rename failed file to current name, do not delete failed */
char filename_failed_old[UTIL_PATH_SIZE];
- util_strlcpy(filename_failed_old, udev_get_dev_path(msg->udev), sizeof(filename_failed_old));
+ util_strlcpy(filename_failed_old, udev_get_dev_path(event->udev), sizeof(filename_failed_old));
util_strlcat(filename_failed_old, "/", sizeof(filename_failed_old));
start = util_strlcat(filename_failed_old, ".udev/failed/", sizeof(filename_failed_old));
- util_strlcat(filename_failed_old, msg->devpath_old, sizeof(filename_failed_old));
+ util_strlcat(filename_failed_old, udev_device_get_devpath_old(event->dev), sizeof(filename_failed_old));
util_path_encode(&filename_failed_old[start], sizeof(filename) - start);
if (rename(filename_failed_old, filename_failed) == 0)
- info(msg->udev, "renamed devpath, moved failed state of '%s' to %s'\n",
- msg->devpath_old, msg->devpath);
+ info(event->udev, "renamed devpath, moved failed state of '%s' to %s'\n",
+ udev_device_get_devpath_old(event->dev), udev_device_get_devpath(event->dev));
} else {
- unlink(filename_failed);
- delete_path(msg->udev, filename_failed);
+ if (unlink(filename_failed) == 0)
+ util_delete_path(event->udev, filename_failed);
}
unlink(filename);
- delete_path(msg->udev, filename);
+
+ /* clean up possibly empty queue directory */
+ if (udev_list_is_empty(&event_list))
+ util_delete_path(event->udev, filename);
break;
case EVENT_FAILED:
/* move failed event to the failed directory */
- create_path(msg->udev, filename_failed);
+ util_create_path(event->udev, filename_failed);
rename(filename, filename_failed);
/* clean up possibly empty queue directory */
- delete_path(msg->udev, filename);
+ if (udev_list_is_empty(&event_list))
+ util_delete_path(event->udev, filename);
break;
}
return;
}
-static void msg_queue_delete(struct udevd_uevent_msg *msg)
+static void event_queue_delete(struct udev_event *event)
{
- list_del(&msg->node);
+ udev_list_node_remove(&event->node);
/* mark as failed, if "add" event returns non-zero */
- if (msg->exitstatus && strcmp(msg->action, "add") == 0)
- export_event_state(msg, EVENT_FAILED);
+ if (event->exitstatus && strcmp(udev_device_get_action(event->dev), "add") == 0)
+ export_event_state(event, EVENT_FAILED);
else
- export_event_state(msg, EVENT_FINISHED);
+ export_event_state(event, EVENT_FINISHED);
- free(msg);
+ udev_device_unref(event->dev);
+ udev_event_unref(event);
+}
+
+static void asmlinkage event_sig_handler(int signum)
+{
+ if (signum == SIGALRM)
+ exit(1);
}
-static void udev_event_run(struct udevd_uevent_msg *msg)
+static void event_fork(struct udev_event *event)
{
pid_t pid;
- int retval;
+ struct sigaction act;
+ int err;
+
+ if (debug_trace) {
+ event->trace = 1;
+ fprintf(stderr, "fork %s (%llu)\n",
+ udev_device_get_syspath(event->dev),
+ udev_device_get_seqnum(event->dev));
+ }
pid = fork();
switch (pid) {
case 0:
/* child */
- close(uevent_netlink_sock);
+ udev_monitor_unref(kernel_monitor);
udev_ctrl_unref(udev_ctrl);
if (inotify_fd >= 0)
close(inotify_fd);
- close(signal_pipe[READ_END]);
- close(signal_pipe[WRITE_END]);
logging_close();
logging_init("udevd-event");
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
- retval = udev_event_process(msg);
- info(msg->udev, "seq %llu finished with %i\n", msg->seqnum, retval);
+ /* set signal handlers */
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = (void (*)(int)) event_sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ sigaction(SIGALRM, &act, NULL);
+
+ /* reset to default */
+ act.sa_handler = SIG_DFL;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+ sigaction(SIGCHLD, &act, NULL);
+ sigaction(SIGHUP, &act, NULL);
+
+ /* set timeout to prevent hanging processes */
+ alarm(UDEV_EVENT_TIMEOUT);
+ /* apply rules, create node, symlinks */
+ err = udev_event_execute_rules(event, rules);
+
+ /* rules may change/disable the timeout */
+ if (udev_device_get_event_timeout(event->dev) >= 0)
+ alarm(udev_device_get_event_timeout(event->dev));
+
+ /* execute RUN= */
+ if (err == 0 && !event->ignore_device && udev_get_run(event->udev))
+ udev_event_execute_run(event);
+
+ info(event->udev, "seq %llu exit with %i\n", udev_device_get_seqnum(event->dev), err);
logging_close();
- if (retval)
+ if (err != 0)
exit(1);
exit(0);
case -1:
- err(msg->udev, "fork of child failed: %m\n");
- msg_queue_delete(msg);
+ err(event->udev, "fork of child failed: %m\n");
+ event_queue_delete(event);
break;
default:
/* get SIGCHLD in main loop */
- info(msg->udev, "seq %llu forked, pid [%d], '%s' '%s', %ld seconds old\n",
- msg->seqnum, pid, msg->action, msg->subsystem, time(NULL) - msg->queue_time);
- msg->pid = pid;
+ info(event->udev, "seq %llu forked, pid [%d], '%s' '%s', %ld seconds old\n",
+ udev_device_get_seqnum(event->dev),
+ pid,
+ udev_device_get_action(event->dev),
+ udev_device_get_subsystem(event->dev),
+ time(NULL) - event->queue_time);
+ event->pid = pid;
+ childs++;
}
}
-static void msg_queue_insert(struct udevd_uevent_msg *msg)
+static void event_queue_insert(struct udev_event *event)
{
char filename[UTIL_PATH_SIZE];
int fd;
- msg->queue_time = time(NULL);
+ event->queue_time = time(NULL);
- export_event_state(msg, EVENT_QUEUED);
- info(msg->udev, "seq %llu queued, '%s' '%s'\n", msg->seqnum, msg->action, msg->subsystem);
+ export_event_state(event, EVENT_QUEUED);
+ info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(event->dev),
+ udev_device_get_action(event->dev), udev_device_get_subsystem(event->dev));
- util_strlcpy(filename, udev_get_dev_path(msg->udev), sizeof(filename));
+ util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd >= 0) {
char str[32];
int len;
- len = sprintf(str, "%llu\n", msg->seqnum);
+ len = sprintf(str, "%llu\n", udev_device_get_seqnum(event->dev));
write(fd, str, len);
close(fd);
}
- /* run one event after the other in debug mode */
- if (debug_trace) {
- list_add_tail(&msg->node, &running_list);
- udev_event_run(msg);
- waitpid(msg->pid, NULL, 0);
- msg_queue_delete(msg);
- return;
- }
+
+ udev_list_node_append(&event->node, &event_list);
+ run_exec_q = 1;
/* run all events with a timeout set immediately */
- if (msg->timeout != 0) {
- list_add_tail(&msg->node, &running_list);
- udev_event_run(msg);
+ if (udev_device_get_timeout(event->dev) > 0) {
+ event_fork(event);
return;
}
-
- list_add_tail(&msg->node, &exec_list);
- run_exec_q = 1;
}
static int mem_size_mb(void)
static int compare_devpath(const char *running, const char *waiting)
{
- int i;
+ int i = 0;
- for (i = 0; i < UTIL_PATH_SIZE; i++) {
- /* identical device event found */
- if (running[i] == '\0' && waiting[i] == '\0')
- return 1;
+ while (running[i] != '\0' && running[i] == waiting[i])
+ i++;
- /* parent device event found */
- if (running[i] == '\0' && waiting[i] == '/')
- return 2;
+ /* identical device event found */
+ if (running[i] == '\0' && waiting[i] == '\0')
+ return 1;
- /* child device event found */
- if (running[i] == '/' && waiting[i] == '\0')
- return 3;
+ /* parent device event found */
+ if (running[i] == '\0' && waiting[i] == '/')
+ return 2;
- /* no matching event */
- if (running[i] != waiting[i])
- break;
- }
+ /* child device event found */
+ if (running[i] == '/' && waiting[i] == '\0')
+ return 3;
+ /* no matching event */
return 0;
}
/* lookup event for identical, parent, child, or physical device */
-static int devpath_busy(struct udevd_uevent_msg *msg, int limit)
+static int devpath_busy(struct udev_event *event)
{
- struct udevd_uevent_msg *loop_msg;
- int childs_count = 0;
-
- /* check exec-queue which may still contain delayed events we depend on */
- list_for_each_entry(loop_msg, &exec_list, node) {
- /* skip ourself and all later events */
- if (loop_msg->seqnum >= msg->seqnum)
- break;
-
- /* check our old name */
- if (msg->devpath_old != NULL)
- if (strcmp(loop_msg->devpath , msg->devpath_old) == 0)
- return 2;
-
- /* check identical, parent, or child device event */
- if (compare_devpath(loop_msg->devpath, msg->devpath) != 0) {
- dbg(msg->udev, "%llu, device event still pending %llu (%s)\n",
- msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
- return 3;
- }
+ struct udev_list_node *loop;
- /* check for our major:minor number */
- if (msg->devt && loop_msg->devt == msg->devt &&
- strcmp(msg->subsystem, loop_msg->subsystem) == 0) {
- dbg(msg->udev, "%llu, device event still pending %llu (%d:%d)\n", msg->seqnum,
- loop_msg->seqnum, major(loop_msg->devt), minor(loop_msg->devt));
- return 4;
- }
-
- /* check physical device event (special case of parent) */
- if (msg->physdevpath && msg->action && strcmp(msg->action, "add") == 0)
- if (compare_devpath(loop_msg->devpath, msg->physdevpath) != 0) {
- dbg(msg->udev, "%llu, physical device event still pending %llu (%s)\n",
- msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
- return 5;
- }
+ if (event->delaying_seqnum > 0) {
}
+ /* check if queue contains events we depend on */
+ udev_list_node_foreach(loop, &event_list) {
+ struct udev_event *loop_event = node_to_event(loop);
- /* check run queue for still running events */
- list_for_each_entry(loop_msg, &running_list, node) {
- childs_count++;
+ /* we already found a later event, earlier can not block us, no need to check again */
+ if (udev_device_get_seqnum(loop_event->dev) < event->delaying_seqnum)
+ continue;
- if (childs_count++ >= limit) {
- info(msg->udev, "%llu, maximum number (%i) of childs reached\n", msg->seqnum, childs_count);
- return 1;
- }
+ /* event we checked earlier still exists, no need to check again */
+ if (udev_device_get_seqnum(loop_event->dev) == event->delaying_seqnum)
+ return 2;
+
+ /* found ourself, no later event can block us */
+ if (udev_device_get_seqnum(loop_event->dev) >= udev_device_get_seqnum(event->dev))
+ break;
/* check our old name */
- if (msg->devpath_old != NULL)
- if (strcmp(loop_msg->devpath , msg->devpath_old) == 0)
- return 2;
+ if (udev_device_get_devpath_old(event->dev) != NULL)
+ if (strcmp(udev_device_get_devpath(loop_event->dev), udev_device_get_devpath_old(event->dev)) == 0) {
+ event->delaying_seqnum = udev_device_get_seqnum(loop_event->dev);
+ return 3;
+ }
/* check identical, parent, or child device event */
- if (compare_devpath(loop_msg->devpath, msg->devpath) != 0) {
- dbg(msg->udev, "%llu, device event still running %llu (%s)\n",
- msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
- return 3;
+ if (compare_devpath(udev_device_get_devpath(loop_event->dev), udev_device_get_devpath(event->dev)) != 0) {
+ dbg(event->udev, "%llu, device event still pending %llu (%s)\n",
+ udev_device_get_seqnum(event->dev),
+ udev_device_get_seqnum(loop_event->dev),
+ udev_device_get_devpath(loop_event->dev));
+ event->delaying_seqnum = udev_device_get_seqnum(loop_event->dev);
+ return 4;
}
/* check for our major:minor number */
- if (msg->devt && loop_msg->devt == msg->devt &&
- strcmp(msg->subsystem, loop_msg->subsystem) == 0) {
- dbg(msg->udev, "%llu, device event still running %llu (%d:%d)\n", msg->seqnum,
- loop_msg->seqnum, major(loop_msg->devt), minor(loop_msg->devt));
- return 4;
+ if (major(udev_device_get_devnum(event->dev)) > 0 &&
+ udev_device_get_devnum(loop_event->dev) == udev_device_get_devnum(event->dev) &&
+ strcmp(udev_device_get_subsystem(event->dev), udev_device_get_subsystem(loop_event->dev)) == 0) {
+ dbg(event->udev, "%llu, device event still pending %llu (%d:%d)\n",
+ udev_device_get_seqnum(event->dev),
+ udev_device_get_seqnum(loop_event->dev),
+ major(udev_device_get_devnum(loop_event->dev)), minor(udev_device_get_devnum(loop_event->dev)));
+ event->delaying_seqnum = udev_device_get_seqnum(loop_event->dev);
+ return 5;
}
/* check physical device event (special case of parent) */
- if (msg->physdevpath && msg->action && strcmp(msg->action, "add") == 0)
- if (compare_devpath(loop_msg->devpath, msg->physdevpath) != 0) {
- dbg(msg->udev, "%llu, physical device event still running %llu (%s)\n",
- msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
- return 5;
+ if (udev_device_get_physdevpath(event->dev) != NULL &&
+ strcmp(udev_device_get_action(event->dev), "add") == 0)
+ if (compare_devpath(udev_device_get_devpath(loop_event->dev),
+ udev_device_get_physdevpath(event->dev)) != 0) {
+ dbg(event->udev, "%llu, physical device event still pending %llu (%s)\n",
+ udev_device_get_seqnum(event->dev),
+ udev_device_get_seqnum(loop_event->dev),
+ udev_device_get_devpath(loop_event->dev));
+ event->delaying_seqnum = udev_device_get_seqnum(loop_event->dev);
+ return 6;
}
}
return 0;
}
/* serializes events for the identical and parent and child devices */
-static void msg_queue_manager(struct udev *udev)
+static void event_queue_manager(struct udev *udev)
{
- struct udevd_uevent_msg *loop_msg;
- struct udevd_uevent_msg *tmp_msg;
+ struct udev_list_node *loop;
+ struct udev_list_node *tmp;
- if (list_empty(&exec_list))
- return;
-
- list_for_each_entry_safe(loop_msg, tmp_msg, &exec_list, node) {
- /* serialize and wait for parent or child events */
- if (devpath_busy(loop_msg, max_childs) != 0) {
- dbg(udev, "delay seq %llu (%s)\n", loop_msg->seqnum, loop_msg->devpath);
- continue;
+ if (udev_list_is_empty(&event_list)) {
+ if (childs > 0) {
+ err(udev, "event list empty, but childs count is %i", childs);
+ childs = 0;
}
-
- /* move event to run list */
- list_move_tail(&loop_msg->node, &running_list);
- udev_event_run(loop_msg);
- dbg(udev, "moved seq %llu to running list\n", loop_msg->seqnum);
+ return;
}
-}
-static struct udevd_uevent_msg *get_msg_from_envbuf(struct udev *udev, const char *buf, int buf_size)
-{
- int bufpos;
- int i;
- struct udevd_uevent_msg *msg;
- char *physdevdriver_key = NULL;
- int maj = 0;
- int min = 0;
-
- msg = malloc(sizeof(struct udevd_uevent_msg) + buf_size);
- if (msg == NULL)
- return NULL;
- memset(msg, 0x00, sizeof(struct udevd_uevent_msg) + buf_size);
- msg->udev = udev;
-
- /* copy environment buffer and reconstruct envp */
- memcpy(msg->envbuf, buf, buf_size);
- bufpos = 0;
- for (i = 0; (bufpos < buf_size) && (i < UEVENT_NUM_ENVP-2); i++) {
- int keylen;
- char *key;
+ udev_list_node_foreach_safe(loop, tmp, &event_list) {
+ struct udev_event *loop_event = node_to_event(loop);
- key = &msg->envbuf[bufpos];
- keylen = strlen(key);
- msg->envp[i] = key;
- bufpos += keylen + 1;
- dbg(udev, "add '%s' to msg.envp[%i]\n", msg->envp[i], i);
-
- /* remember some keys for further processing */
- if (strncmp(key, "ACTION=", 7) == 0)
- msg->action = &key[7];
- else if (strncmp(key, "DEVPATH=", 8) == 0)
- msg->devpath = &key[8];
- else if (strncmp(key, "SUBSYSTEM=", 10) == 0)
- msg->subsystem = &key[10];
- else if (strncmp(key, "DRIVER=", 7) == 0)
- msg->driver = &key[7];
- else if (strncmp(key, "SEQNUM=", 7) == 0)
- msg->seqnum = strtoull(&key[7], NULL, 10);
- else if (strncmp(key, "DEVPATH_OLD=", 12) == 0)
- msg->devpath_old = &key[12];
- else if (strncmp(key, "PHYSDEVPATH=", 12) == 0)
- msg->physdevpath = &key[12];
- else if (strncmp(key, "PHYSDEVDRIVER=", 14) == 0)
- physdevdriver_key = key;
- else if (strncmp(key, "MAJOR=", 6) == 0)
- maj = strtoull(&key[6], NULL, 10);
- else if (strncmp(key, "MINOR=", 6) == 0)
- min = strtoull(&key[6], NULL, 10);
- else if (strncmp(key, "TIMEOUT=", 8) == 0)
- msg->timeout = strtoull(&key[8], NULL, 10);
- }
- msg->devt = makedev(maj, min);
- msg->envp[i++] = "UDEVD_EVENT=1";
+ if (childs >= max_childs) {
+ info(udev, "maximum number (%i) of childs reached\n", childs);
+ break;
+ }
- if (msg->driver == NULL && msg->physdevpath == NULL && physdevdriver_key != NULL) {
- /* for older kernels DRIVER is empty for a bus device, export PHYSDEVDRIVER as DRIVER */
- msg->envp[i++] = &physdevdriver_key[7];
- msg->driver = &physdevdriver_key[14];
- }
+ if (loop_event->pid != 0)
+ continue;
- msg->envp[i] = NULL;
+ /* do not start event if parent or child event is still running */
+ if (devpath_busy(loop_event) != 0) {
+ dbg(udev, "delay seq %llu (%s)\n",
+ udev_device_get_seqnum(loop_event->dev),
+ udev_device_get_devpath(loop_event->dev));
+ continue;
+ }
- if (msg->devpath == NULL || msg->action == NULL) {
- info(udev, "DEVPATH or ACTION missing, ignore message\n");
- free(msg);
- return NULL;
+ event_fork(loop_event);
+ dbg(udev, "moved seq %llu to running list\n", udev_device_get_seqnum(loop_event->dev));
}
- return msg;
}
/* receive the udevd message from userspace */
if (i >= 0) {
info(udev, "udevd message (SET_LOG_PRIORITY) received, log_priority=%i\n", i);
udev_set_log_priority(udev, i);
- sprintf(udev_log_env, "UDEV_LOG=%i", i);
- putenv(udev_log_env);
}
if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {
if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {
info(udev, "udevd message (START_EXEC_QUEUE) received\n");
stop_exec_q = 0;
- msg_queue_manager(udev);
+ event_queue_manager(udev);
}
if (udev_ctrl_get_reload_rules(ctrl_msg) > 0) {
str = udev_ctrl_get_set_env(ctrl_msg);
if (str != NULL) {
- char *key = strdup(str);
- char *val;
-
- val = strchr(str, '=');
- if (val != NULL) {
- val[0] = '\0';
- val = &val[1];
- if (val[0] == '\0') {
- info(udev, "udevd message (ENV) received, unset '%s'\n", key);
- unsetenv(str);
+ char *key;
+
+ key = strdup(str);
+ if (key != NULL) {
+ char *val;
+
+ val = strchr(key, '=');
+ if (val != NULL) {
+ val[0] = '\0';
+ val = &val[1];
+ if (val[0] == '\0') {
+ info(udev, "udevd message (ENV) received, unset '%s'\n", key);
+ udev_add_property(udev, key, NULL);
+ } else {
+ info(udev, "udevd message (ENV) received, set '%s=%s'\n", key, val);
+ udev_add_property(udev, key, val);
+ }
} else {
- info(udev, "udevd message (ENV) received, set '%s=%s'\n", key, val);
- setenv(key, val, 1);
+ err(udev, "wrong key format '%s'\n", key);
}
- } else {
- err(udev, "wrong key format '%s'\n", key);
+ free(key);
}
- free(key);
}
i = udev_ctrl_get_set_max_childs(ctrl_msg);
info(udev, "udevd message (SET_MAX_CHILDS) received, max_childs=%i\n", i);
max_childs = i;
}
-
udev_ctrl_msg_unref(ctrl_msg);
}
-/* receive the kernel user event message and do some sanity checks */
-static struct udevd_uevent_msg *get_netlink_msg(struct udev *udev)
-{
- struct udevd_uevent_msg *msg;
- int bufpos;
- ssize_t size;
- static char buffer[UEVENT_BUFFER_SIZE+512];
- char *pos;
-
- size = recv(uevent_netlink_sock, &buffer, sizeof(buffer), 0);
- if (size < 0) {
- if (errno != EINTR)
- err(udev, "unable to receive kernel netlink message: %m\n");
- return NULL;
- }
-
- if ((size_t)size > sizeof(buffer)-1)
- size = sizeof(buffer)-1;
- buffer[size] = '\0';
- dbg(udev, "uevent_size=%zi\n", size);
-
- /* start of event payload */
- bufpos = strlen(buffer)+1;
- msg = get_msg_from_envbuf(udev, &buffer[bufpos], size-bufpos);
- if (msg == NULL)
- return NULL;
-
- /* validate message */
- pos = strchr(buffer, '@');
- if (pos == NULL) {
- err(udev, "invalid uevent '%s'\n", buffer);
- free(msg);
- return NULL;
- }
- pos[0] = '\0';
-
- if (msg->action == NULL) {
- info(udev, "no ACTION in payload found, skip event '%s'\n", buffer);
- free(msg);
- return NULL;
- }
-
- if (strcmp(msg->action, buffer) != 0) {
- err(udev, "ACTION in payload does not match uevent, skip event '%s'\n", buffer);
- free(msg);
- return NULL;
- }
-
- return msg;
-}
-
static void asmlinkage sig_handler(int signum)
{
switch (signum) {
break;
}
- /* write to pipe, which will wakeup select() in our mainloop */
- write(signal_pipe[WRITE_END], "", 1);
+ signal_received = 1;
}
static void udev_done(int pid, int exitstatus)
{
- /* find msg associated with pid and delete it */
- struct udevd_uevent_msg *msg;
-
- list_for_each_entry(msg, &running_list, node) {
- if (msg->pid == pid) {
- info(msg->udev, "seq %llu, pid [%d] exit with %i, %ld seconds old\n", msg->seqnum, msg->pid,
- exitstatus, time(NULL) - msg->queue_time);
- msg->exitstatus = exitstatus;
- msg_queue_delete(msg);
-
- /* there may be events waiting with the same devpath */
+ struct udev_list_node *loop;
+
+ /* find event associated with pid and delete it */
+ udev_list_node_foreach(loop, &event_list) {
+ struct udev_event *loop_event = node_to_event(loop);
+
+ if (loop_event->pid == pid) {
+ info(loop_event->udev, "seq %llu cleanup, pid [%d], status %i, %ld seconds old\n",
+ udev_device_get_seqnum(loop_event->dev), loop_event->pid,
+ exitstatus, time(NULL) - loop_event->queue_time);
+ loop_event->exitstatus = exitstatus;
+ if (debug_trace)
+ fprintf(stderr, "exit %s (%llu)\n",
+ udev_device_get_syspath(loop_event->dev),
+ udev_device_get_seqnum(loop_event->dev));
+ event_queue_delete(loop_event);
+ childs--;
+
+ /* there may be dependent events waiting */
run_exec_q = 1;
return;
}
}
}
-static int init_uevent_netlink_sock(struct udev *udev)
+static void cleanup_queue_dir(struct udev *udev)
{
- struct sockaddr_nl snl;
- const int buffersize = 16 * 1024 * 1024;
- int retval;
-
- memset(&snl, 0x00, sizeof(struct sockaddr_nl));
- snl.nl_family = AF_NETLINK;
- snl.nl_pid = getpid();
- snl.nl_groups = 1;
-
- uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
- if (uevent_netlink_sock == -1) {
- err(udev, "error getting socket: %m\n");
- return -1;
- }
-
- /* set receive buffersize */
- setsockopt(uevent_netlink_sock, SOL_SOCKET, SO_RCVBUFFORCE, &buffersize, sizeof(buffersize));
+ char dirname[UTIL_PATH_SIZE];
+ char filename[UTIL_PATH_SIZE];
+ DIR *dir;
- retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl, sizeof(struct sockaddr_nl));
- if (retval < 0) {
- err(udev, "bind failed: %m\n");
- close(uevent_netlink_sock);
- uevent_netlink_sock = -1;
- return -1;
+ util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
+ util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
+ unlink(filename);
+
+ util_strlcpy(dirname, udev_get_dev_path(udev), sizeof(dirname));
+ util_strlcat(dirname, "/.udev/queue", sizeof(dirname));
+ dir = opendir(dirname);
+ if (dir != NULL) {
+ while (1) {
+ struct dirent *dent;
+
+ dent = readdir(dir);
+ if (dent == NULL || dent->d_name[0] == '\0')
+ break;
+ if (dent->d_name[0] == '.')
+ continue;
+ util_strlcpy(filename, dirname, sizeof(filename));
+ util_strlcat(filename, "/", sizeof(filename));
+ util_strlcat(filename, dent->d_name, sizeof(filename));
+ unlink(filename);
+ }
+ closedir(dir);
+ rmdir(dirname);
}
- return 0;
}
static void export_initial_seqnum(struct udev *udev)
}
util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
- create_path(udev, filename);
+ util_create_path(udev, filename);
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd >= 0) {
write(fd, seqnum, len);
int main(int argc, char *argv[])
{
struct udev *udev;
- int retval;
int fd;
struct sigaction act;
- fd_set readfds;
const char *value;
int daemonize = 0;
static const struct option options[] = {
- { "daemon", 0, NULL, 'd' },
- { "debug-trace", 0, NULL, 't' },
- { "debug", 0, NULL, 'D' },
- { "help", 0, NULL, 'h' },
- { "version", 0, NULL, 'V' },
+ { "daemon", no_argument, NULL, 'd' },
+ { "debug-trace", no_argument, NULL, 't' },
+ { "debug", no_argument, NULL, 'D' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
{}
};
int rc = 1;
- int maxfd;
udev = udev_new();
if (udev == NULL)
logging_init("udevd");
udev_set_log_fn(udev, log_fn);
- dbg(udev, "version %s\n", VERSION);
+ info(udev, "version %s\n", VERSION);
+ udev_selinux_init(udev);
while (1) {
int option;
fprintf(stderr, "cannot open /dev/null\n");
err(udev, "cannot open /dev/null\n");
}
- if (fd > STDIN_FILENO)
- dup2(fd, STDIN_FILENO);
if (write(STDOUT_FILENO, 0, 0) < 0)
dup2(fd, STDOUT_FILENO);
if (write(STDERR_FILENO, 0, 0) < 0)
goto exit;
}
- if (init_uevent_netlink_sock(udev) < 0) {
+ kernel_monitor = udev_monitor_new_from_netlink(udev);
+ if (kernel_monitor == NULL || udev_monitor_enable_receiving(kernel_monitor) < 0) {
fprintf(stderr, "error initializing netlink socket\n");
err(udev, "error initializing netlink socket\n");
rc = 3;
goto exit;
}
+ udev_monitor_set_receive_buffer_size(kernel_monitor, 128*1024*1024);
- retval = pipe(signal_pipe);
- if (retval < 0) {
- err(udev, "error getting pipes: %m\n");
- goto exit;
- }
-
- retval = fcntl(signal_pipe[READ_END], F_GETFL, 0);
- if (retval < 0) {
- err(udev, "error fcntl on read pipe: %m\n");
- goto exit;
- }
- retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK);
- if (retval < 0) {
- err(udev, "error fcntl on read pipe: %m\n");
- goto exit;
- }
-
- retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0);
- if (retval < 0) {
- err(udev, "error fcntl on write pipe: %m\n");
- goto exit;
- }
- retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK);
- if (retval < 0) {
- err(udev, "error fcntl on write pipe: %m\n");
+ rules = udev_rules_new(udev, 1);
+ if (rules == NULL) {
+ err(udev, "error reading rules\n");
goto exit;
}
-
- /* parse the rules and keep them in memory */
- sysfs_init();
- udev_rules_init(udev, &rules, 1);
-
+ udev_list_init(&event_list);
+ cleanup_queue_dir(udev);
export_initial_seqnum(udev);
if (daemonize) {
}
/* redirect std{out,err} */
- if (!debug) {
+ if (!debug && !debug_trace) {
+ dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
}
fd = open("/dev/kmsg", O_WRONLY);
if (fd > 0) {
- const char *str = "<6>udevd version " VERSION " started\n";
-
- write(fd, str, strlen(str));
+ const char *ver_str = "<6>udev: starting version " VERSION "\n";
+ char path[UTIL_PATH_SIZE];
+ struct stat statbuf;
+
+ write(fd, ver_str, strlen(ver_str));
+ util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+ util_strlcat(path, "/class/mem/null", sizeof(path));
+ if (lstat(path, &statbuf) == 0) {
+ if (S_ISDIR(statbuf.st_mode)) {
+ const char *depr_str =
+ "<6>udev: deprecated sysfs layout; update the kernel or "
+ "disable CONFIG_SYSFS_DEPRECATED; some udev features will "
+ "not work correctly\n";
+
+ write(fd, depr_str, strlen(depr_str));
+ }
+ }
close(fd);
}
memset(&act, 0x00, sizeof(struct sigaction));
act.sa_handler = (void (*)(int)) sig_handler;
sigemptyset(&act.sa_mask);
- act.sa_flags = SA_RESTART;
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
sigaction(SIGCHLD, &act, NULL);
inotify_add_watch(inotify_fd, udev_get_rules_path(udev),
IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
} else {
- char filename[PATH_MAX];
+ char filename[UTIL_PATH_SIZE];
inotify_add_watch(inotify_fd, UDEV_PREFIX "/lib/udev/rules.d",
IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
}
} else if (errno == ENOSYS)
- err(udev, "the kernel does not support inotify, udevd can't monitor rules file changes\n");
+ info(udev, "unable to use inotify, udevd will not monitor rule files changes\n");
else
err(udev, "inotify_init failed: %m\n");
- /* maximum limit of forked childs */
- value = getenv("UDEVD_MAX_CHILDS");
- if (value)
- max_childs = strtoul(value, NULL, 10);
- else {
+ /* in trace mode run one event after the other */
+ if (debug_trace) {
+ max_childs = 1;
+ } else {
int memsize = mem_size_mb();
if (memsize > 0)
max_childs = 128 + (memsize / 4);
else
max_childs = UDEVD_MAX_CHILDS;
}
+ /* possibly overwrite maximum limit of executed events */
+ value = getenv("UDEVD_MAX_CHILDS");
+ if (value)
+ max_childs = strtoul(value, NULL, 10);
info(udev, "initialize max_childs to %u\n", max_childs);
- /* clear environment for forked event processes */
- clearenv();
+ while (!udev_exit) {
+ sigset_t blocked_mask, orig_mask;
+ struct pollfd pfd[4];
+ struct pollfd *ctrl_poll, *monitor_poll, *inotify_poll = NULL;
+ int nfds = 0;
+ int fdcount;
- /* export log_priority , as called programs may want to follow that setting */
- sprintf(udev_log_env, "UDEV_LOG=%i", udev_get_log_priority(udev));
- putenv(udev_log_env);
- if (debug_trace)
- putenv("DEBUG=1");
+ sigfillset(&blocked_mask);
+ sigprocmask(SIG_SETMASK, &blocked_mask, &orig_mask);
+ if (signal_received) {
+ sigprocmask(SIG_SETMASK, &orig_mask, NULL);
+ goto handle_signals;
+ }
- maxfd = udev_ctrl_get_fd(udev_ctrl);
- maxfd = UDEV_MAX(maxfd, uevent_netlink_sock);
- maxfd = UDEV_MAX(maxfd, signal_pipe[READ_END]);
- maxfd = UDEV_MAX(maxfd, inotify_fd);
+ ctrl_poll = &pfd[nfds++];
+ ctrl_poll->fd = udev_ctrl_get_fd(udev_ctrl);
+ ctrl_poll->events = POLLIN;
- while (!udev_exit) {
- struct udevd_uevent_msg *msg;
- int fdcount;
+ monitor_poll = &pfd[nfds++];
+ monitor_poll->fd = udev_monitor_get_fd(kernel_monitor);
+ monitor_poll->events = POLLIN;
- FD_ZERO(&readfds);
- FD_SET(signal_pipe[READ_END], &readfds);
- FD_SET(udev_ctrl_get_fd(udev_ctrl), &readfds);
- FD_SET(uevent_netlink_sock, &readfds);
- if (inotify_fd >= 0)
- FD_SET(inotify_fd, &readfds);
+ if (inotify_fd >= 0) {
+ inotify_poll = &pfd[nfds++];
+ inotify_poll->fd = inotify_fd;
+ inotify_poll->events = POLLIN;
+ }
- fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL);
+ fdcount = ppoll(pfd, nfds, NULL, &orig_mask);
+ sigprocmask(SIG_SETMASK, &orig_mask, NULL);
if (fdcount < 0) {
- if (errno != EINTR)
- err(udev, "error in select: %m\n");
+ if (errno == EINTR)
+ goto handle_signals;
+ err(udev, "error in select: %m\n");
continue;
}
/* get control message */
- if (FD_ISSET(udev_ctrl_get_fd(udev_ctrl), &readfds))
+ if (ctrl_poll->revents & POLLIN)
handle_ctrl_msg(udev_ctrl);
- /* get netlink message */
- if (FD_ISSET(uevent_netlink_sock, &readfds)) {
- msg = get_netlink_msg(udev);
- if (msg)
- msg_queue_insert(msg);
- }
+ /* get kernel uevent */
+ if (monitor_poll->revents & POLLIN) {
+ struct udev_device *dev;
- /* received a signal, clear our notification pipe */
- if (FD_ISSET(signal_pipe[READ_END], &readfds)) {
- char buf[256];
+ dev = udev_monitor_receive_device(kernel_monitor);
+ if (dev != NULL) {
+ struct udev_event *event;
- read(signal_pipe[READ_END], &buf, sizeof(buf));
+ event = udev_event_new(dev);
+ if (event != NULL)
+ event_queue_insert(event);
+ else
+ udev_device_unref(dev);
+ }
}
/* rules directory inotify watch */
- if ((inotify_fd >= 0) && FD_ISSET(inotify_fd, &readfds)) {
+ if (inotify_poll && (inotify_poll->revents & POLLIN)) {
int nbytes;
/* discard all possible events, we can just reload the config */
}
}
+handle_signals:
+ signal_received = 0;
+
/* rules changed, set by inotify or a HUP signal */
if (reload_config) {
+ struct udev_rules *rules_new;
+
reload_config = 0;
- udev_rules_cleanup(&rules);
- udev_rules_init(udev, &rules, 1);
+ rules_new = udev_rules_new(udev, 1);
+ if (rules_new != NULL) {
+ udev_rules_unref(rules);
+ rules = rules_new;
+ }
}
- /* forked child has returned */
if (sigchilds_waiting) {
sigchilds_waiting = 0;
reap_sigchilds();
if (run_exec_q) {
run_exec_q = 0;
if (!stop_exec_q)
- msg_queue_manager(udev);
+ event_queue_manager(udev);
}
}
+ cleanup_queue_dir(udev);
rc = 0;
-
exit:
- udev_rules_cleanup(&rules);
- sysfs_cleanup();
-
- if (signal_pipe[READ_END] >= 0)
- close(signal_pipe[READ_END]);
- if (signal_pipe[WRITE_END] >= 0)
- close(signal_pipe[WRITE_END]);
-
+ udev_rules_unref(rules);
udev_ctrl_unref(udev_ctrl);
if (inotify_fd >= 0)
close(inotify_fd);
- if (uevent_netlink_sock >= 0)
- close(uevent_netlink_sock);
-
+ udev_monitor_unref(kernel_monitor);
+ udev_selinux_exit(udev);
+ udev_unref(udev);
logging_close();
return rc;
}
~ianmdlvl / elogind.git / blobdiff