/*
- * Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation version 2 of the License.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "config.h"
-
#include <stddef.h>
#include <signal.h>
#include <unistd.h>
#include "udev.h"
#include "udev_rules.h"
-#include "udev_selinux.h"
#define UDEVD_PRIORITY -4
#define UDEV_PRIORITY -2
/* maximum limit of forked childs */
#define UDEVD_MAX_CHILDS 256
-/* start to throttle forking if maximum number of running childs in our session is reached */
-#define UDEVD_MAX_CHILDS_RUNNING 16
static int debug;
static struct udev_ctrl *udev_ctrl;
static int uevent_netlink_sock = -1;
static int inotify_fd = -1;
-static pid_t sid;
static int signal_pipe[2] = {-1, -1};
static volatile int sigchilds_waiting;
static int run_exec_q;
static int stop_exec_q;
static int max_childs;
-static int max_childs_running;
static char udev_log_env[32];
static LIST_HEAD(exec_list);
udevice = udev_device_init(msg->udev);
if (udevice == NULL)
return -1;
- strlcpy(udevice->action, msg->action, sizeof(udevice->action));
+ 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;
static void export_event_state(struct udevd_uevent_msg *msg, enum event_state state)
{
- char filename[PATH_SIZE];
- char filename_failed[PATH_SIZE];
+ 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);
/* location of failed file */
- strlcpy(filename_failed, udev_get_dev_path(msg->udev), sizeof(filename_failed));
- strlcat(filename_failed, "/", sizeof(filename_failed));
- start = strlcat(filename_failed, ".udev/failed/", sizeof(filename_failed));
- strlcat(filename_failed, msg->devpath, sizeof(filename_failed));
- path_encode(&filename_failed[start], sizeof(filename_failed) - start);
+ util_strlcpy(filename_failed, udev_get_dev_path(msg->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_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);
- selinux_setfscreatecon(msg->udev, filename, NULL, S_IFLNK);
+ udev_selinux_setfscreatecon(msg->udev, filename, S_IFLNK);
symlink(msg->devpath, filename);
- selinux_resetfscreatecon(msg->udev);
+ udev_selinux_resetfscreatecon(msg->udev);
break;
case EVENT_FINISHED:
if (msg->devpath_old != NULL) {
/* "move" event - rename failed file to current name, do not delete failed */
- char filename_failed_old[PATH_SIZE];
+ char filename_failed_old[UTIL_PATH_SIZE];
- strlcpy(filename_failed_old, udev_get_dev_path(msg->udev), sizeof(filename_failed_old));
- strlcat(filename_failed_old, "/", sizeof(filename_failed_old));
- start = strlcat(filename_failed_old, ".udev/failed/", sizeof(filename_failed_old));
- strlcat(filename_failed_old, msg->devpath_old, sizeof(filename_failed_old));
- path_encode(&filename_failed_old[start], sizeof(filename) - start);
+ util_strlcpy(filename_failed_old, udev_get_dev_path(msg->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_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",
exit(1);
exit(0);
case -1:
- err(msg->udev, "fork of child failed: %s\n", strerror(errno));
+ err(msg->udev, "fork of child failed: %m\n");
msg_queue_delete(msg);
break;
default:
static void msg_queue_insert(struct udevd_uevent_msg *msg)
{
- char filename[PATH_SIZE];
+ char filename[UTIL_PATH_SIZE];
int fd;
msg->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);
- strlcpy(filename, udev_get_dev_path(msg->udev), sizeof(filename));
- strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
+ util_strlcpy(filename, udev_get_dev_path(msg->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];
return memsize;
}
-static int cpu_count(void)
-{
- FILE* f;
- char buf[4096];
- int count = 0;
-
- f = fopen("/proc/stat", "r");
- if (f == NULL)
- return -1;
-
- while (fgets(buf, sizeof(buf), f) != NULL) {
- if (strncmp(buf, "cpu", 3) == 0 && isdigit(buf[3]))
- count++;
- }
-
- fclose(f);
- if (count == 0)
- return -1;
- return count;
-}
-
-static int running_processes(void)
-{
- FILE* f;
- char buf[4096];
- int running = -1;
-
- f = fopen("/proc/stat", "r");
- if (f == NULL)
- return -1;
-
- while (fgets(buf, sizeof(buf), f) != NULL) {
- int value;
-
- if (sscanf(buf, "procs_running %u", &value) == 1) {
- running = value;
- break;
- }
- }
-
- fclose(f);
- return running;
-}
-
-/* return the number of process es in our session, count only until limit */
-static int running_processes_in_session(pid_t session, int limit)
-{
- DIR *dir;
- struct dirent *dent;
- int running = 0;
-
- dir = opendir("/proc");
- if (!dir)
- return -1;
-
- /* read process info from /proc */
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- int f;
- char procdir[64];
- char line[256];
- const char *pos;
- char state;
- pid_t ppid, pgrp, sess;
- int len;
-
- if (!isdigit(dent->d_name[0]))
- continue;
-
- snprintf(procdir, sizeof(procdir), "/proc/%s/stat", dent->d_name);
- procdir[sizeof(procdir)-1] = '\0';
-
- f = open(procdir, O_RDONLY);
- if (f == -1)
- continue;
-
- len = read(f, line, sizeof(line)-1);
- close(f);
-
- if (len <= 0)
- continue;
- else
- line[len] = '\0';
-
- /* skip ugly program name */
- pos = strrchr(line, ')') + 2;
- if (pos == NULL)
- continue;
-
- if (sscanf(pos, "%c %d %d %d ", &state, &ppid, &pgrp, &sess) != 4)
- continue;
-
- /* count only processes in our session */
- if (sess != session)
- continue;
-
- /* count only running, no sleeping processes */
- if (state != 'R')
- continue;
-
- running++;
- if (limit > 0 && running >= limit)
- break;
- }
- closedir(dir);
-
- return running;
-}
-
static int compare_devpath(const char *running, const char *waiting)
{
int i;
- for (i = 0; i < PATH_SIZE; i++) {
+ for (i = 0; i < UTIL_PATH_SIZE; i++) {
/* identical device event found */
if (running[i] == '\0' && waiting[i] == '\0')
return 1;
/* check run queue for still running events */
list_for_each_entry(loop_msg, &running_list, node) {
- if (limit && childs_count++ > limit) {
- dbg(msg->udev, "%llu, maximum number (%i) of childs reached\n", msg->seqnum, childs_count);
+ childs_count++;
+
+ if (childs_count++ >= limit) {
+ info(msg->udev, "%llu, maximum number (%i) of childs reached\n", msg->seqnum, childs_count);
return 1;
}
{
struct udevd_uevent_msg *loop_msg;
struct udevd_uevent_msg *tmp_msg;
- int running;
if (list_empty(&exec_list))
return;
- running = running_processes();
- dbg(udev, "%d processes runnning on system\n", running);
- if (running < 0)
- running = max_childs_running;
-
list_for_each_entry_safe(loop_msg, tmp_msg, &exec_list, node) {
- /* check running processes in our session and possibly throttle */
- if (running >= max_childs_running) {
- running = running_processes_in_session(sid, max_childs_running+10);
- dbg(udev, "at least %d processes running in session\n", running);
- if (running >= max_childs_running) {
- dbg(udev, "delay seq %llu, too many processes already running\n", loop_msg->seqnum);
- return;
- }
- }
-
/* 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);
/* move event to run list */
list_move_tail(&loop_msg->node, &running_list);
udev_event_run(loop_msg);
- running++;
dbg(udev, "moved seq %llu to running list\n", loop_msg->seqnum);
}
}
max_childs = i;
}
- i = udev_ctrl_get_set_max_childs_running(ctrl_msg);
- if (i > 0) {
- info(udev, "udevd message (SET_MAX_CHILDS_RUNNING) received, max_childs_running=%i\n", i);
- max_childs_running = i;
- }
-
udev_ctrl_msg_unref(ctrl_msg);
}
size = recv(uevent_netlink_sock, &buffer, sizeof(buffer), 0);
if (size < 0) {
if (errno != EINTR)
- err(udev, "unable to receive kernel netlink message: %s\n", strerror(errno));
+ err(udev, "unable to receive kernel netlink message: %m\n");
return NULL;
}
uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if (uevent_netlink_sock == -1) {
- err(udev, "error getting socket: %s\n", strerror(errno));
+ err(udev, "error getting socket: %m\n");
return -1;
}
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl, sizeof(struct sockaddr_nl));
if (retval < 0) {
- err(udev, "bind failed: %s\n", strerror(errno));
+ err(udev, "bind failed: %m\n");
close(uevent_netlink_sock);
uevent_netlink_sock = -1;
return -1;
static void export_initial_seqnum(struct udev *udev)
{
- char filename[PATH_SIZE];
+ char filename[UTIL_PATH_SIZE];
int fd;
char seqnum[32];
ssize_t len = 0;
- strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
- strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
+ util_strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
+ util_strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
fd = open(filename, O_RDONLY);
if (fd >= 0) {
len = read(fd, seqnum, sizeof(seqnum)-1);
strcpy(seqnum, "0\n");
len = 3;
}
- strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
- strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
+ util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
+ util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
create_path(udev, filename);
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd >= 0) {
logging_init("udevd");
udev_set_log_fn(udev, log_fn);
-
- selinux_init(udev);
dbg(udev, "version %s\n", VERSION);
while (1) {
retval = pipe(signal_pipe);
if (retval < 0) {
- err(udev, "error getting pipes: %s\n", strerror(errno));
+ 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: %s\n", strerror(errno));
+ 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: %s\n", strerror(errno));
+ 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: %s\n", strerror(errno));
+ 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: %s\n", strerror(errno));
+ err(udev, "error fcntl on write pipe: %m\n");
goto exit;
}
dbg(udev, "daemonized fork running\n");
break;
case -1:
- err(udev, "fork of daemon failed: %s\n", strerror(errno));
+ err(udev, "fork of daemon failed: %m\n");
rc = 4;
goto exit;
default:
chdir("/");
umask(022);
-
- /* become session leader */
- sid = setsid();
- dbg(udev, "our session is %d\n", sid);
+ setsid();
/* OOM_DISABLE == -17 */
fd = open("/proc/self/oom_adj", O_RDWR);
if (fd < 0)
- err(udev, "error disabling OOM: %s\n", strerror(errno));
+ err(udev, "error disabling OOM: %m\n");
else {
write(fd, "-17", 3);
close(fd);
IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
/* watch dynamic rules directory */
- strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
- strlcat(filename, "/.udev/rules.d", sizeof(filename));
+ util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
+ util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
inotify_add_watch(inotify_fd, filename,
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");
else
- err(udev, "inotify_init failed: %s\n", strerror(errno));
+ err(udev, "inotify_init failed: %m\n");
/* maximum limit of forked childs */
value = getenv("UDEVD_MAX_CHILDS");
}
info(udev, "initialize max_childs to %u\n", max_childs);
- /* start to throttle forking if maximum number of _running_ childs is reached */
- value = getenv("UDEVD_MAX_CHILDS_RUNNING");
- if (value)
- max_childs_running = strtoull(value, NULL, 10);
- else {
- int cpus = cpu_count();
- if (cpus > 0)
- max_childs_running = 8 + (8 * cpus);
- else
- max_childs_running = UDEVD_MAX_CHILDS_RUNNING;
- }
- info(udev, "initialize max_childs_running to %u\n", max_childs_running);
-
/* clear environment for forked event processes */
clearenv();
fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL);
if (fdcount < 0) {
if (errno != EINTR)
- err(udev, "error in select: %s\n", strerror(errno));
+ err(udev, "error in select: %m\n");
continue;
}
exit:
udev_rules_cleanup(&rules);
sysfs_cleanup();
- selinux_exit(udev);
if (signal_pipe[READ_END] >= 0)
close(signal_pipe[READ_END]);
~ianmdlvl / elogind.git / blobdiff