/*
- * udevd.c - event listener and serializer
- *
- * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2004-2006 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.
*
* 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <fcntl.h>
#include <syslog.h>
#include <time.h>
+#include <getopt.h>
#include <sys/select.h>
#include <sys/wait.h>
#include <sys/types.h>
#include "udev.h"
#include "udev_rules.h"
#include "udevd.h"
+#include "udev_selinux.h"
+
+static int debug_trace;
+static int debug;
static struct udev_rules rules;
-static int udevd_sock;
-static int uevent_netlink_sock;
-static int inotify_fd;
+static int udevd_sock = -1;
+static int uevent_netlink_sock = -1;
+static int inotify_fd = -1;
static pid_t sid;
static int signal_pipe[2] = {-1, -1};
return;
va_start(args, format);
- vsyslog(priority, format, args);
+ if (debug) {
+ printf("[%d] ", (int) getpid());
+ vprintf(format, args);
+ } else
+ vsyslog(priority, format, args);
va_end(args);
}
+
#endif
static void asmlinkage udev_event_sig_handler(int signum)
exit(1);
}
-static int udev_event_process(struct uevent_msg *msg)
+static int udev_event_process(struct udevd_uevent_msg *msg)
{
struct sigaction act;
struct udevice *udev;
sigaction(SIGHUP, &act, NULL);
/* trigger timeout to prevent hanging processes */
- alarm(UDEV_ALARM_TIMEOUT);
+ alarm(UDEV_EVENT_TIMEOUT);
/* reconstruct event environment from message */
for (i = 0; msg->envp[i]; i++)
putenv(msg->envp[i]);
- udev = udev_device_init();
+ udev = udev_device_init(NULL);
if (udev == NULL)
return -1;
strlcpy(udev->action, msg->action, sizeof(udev->action));
- sysfs_device_set_values(udev->dev, msg->devpath, msg->subsystem);
+ sysfs_device_set_values(udev->dev, msg->devpath, msg->subsystem, msg->driver);
+ udev->devpath_old = msg->devpath_old;
udev->devt = msg->devt;
retval = udev_device_event(&rules, udev);
+ /* rules may change/disable the timeout */
+ if (udev->event_timeout >= 0)
+ alarm(udev->event_timeout);
+
/* run programs collected by RUN-key*/
- if (retval == 0 && !udev->ignore_device && udev_run) {
- struct name_entry *name_loop;
-
- dbg("executing run list");
- list_for_each_entry(name_loop, &udev->run_list, node) {
- if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
- pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, udev->action);
- else {
- char program[PATH_SIZE];
-
- strlcpy(program, name_loop->name, sizeof(program));
- udev_rules_apply_format(udev, program, sizeof(program));
- if (run_program(program, udev->dev->subsystem, NULL, 0, NULL,
- (udev_log_priority >= LOG_INFO)))
- retval = -1;
- }
- }
- }
+ if (retval == 0 && !udev->ignore_device && udev_run)
+ retval = udev_rules_run(udev);
udev_device_cleanup(udev);
return retval;
EVENT_FAILED,
};
-static void export_event_state(struct uevent_msg *msg, enum event_state state)
+static void export_event_state(struct udevd_uevent_msg *msg, enum event_state state)
{
char filename[PATH_SIZE];
char filename_failed[PATH_SIZE];
- char target[PATH_SIZE];
- size_t start, end, i;
- struct uevent_msg *loop_msg;
+ size_t start;
- /* add location of queue files */
- strlcpy(filename, udev_root, sizeof(filename));
- strlcat(filename, "/", sizeof(filename));
- start = strlcat(filename, EVENT_QUEUE_DIR, sizeof(filename));
- end = strlcat(filename, msg->devpath, sizeof(filename));
- if (end > sizeof(filename))
- end = sizeof(filename);
-
- /* replace '/' to transform path into a filename */
- for (i = start+1; i < end; i++)
- if (filename[i] == '/')
- filename[i] = PATH_TO_NAME_CHAR;
-
- /* add location of failed files */
+ /* location of queue file */
+ snprintf(filename, sizeof(filename), "%s/"EVENT_QUEUE_DIR"/%llu", udev_root, msg->seqnum);
+
+ /* location of failed file */
strlcpy(filename_failed, udev_root, sizeof(filename_failed));
strlcat(filename_failed, "/", sizeof(filename_failed));
- start = strlcat(filename_failed, EVENT_FAILED_DIR, sizeof(filename_failed));
- end = strlcat(filename_failed, msg->devpath, sizeof(filename_failed));
- if (end > sizeof(filename_failed))
- end = sizeof(filename_failed);
-
- /* replace '/' to transform path into a filename */
- for (i = start+1; i < end; i++)
- if (filename_failed[i] == '/')
- filename_failed[i] = PATH_TO_NAME_CHAR;
+ start = strlcat(filename_failed, EVENT_FAILED_DIR"/", sizeof(filename_failed));
+ strlcat(filename_failed, msg->devpath, sizeof(filename_failed));
+ path_encode(&filename_failed[start], sizeof(filename_failed) - start);
switch (state) {
case EVENT_QUEUED:
unlink(filename_failed);
delete_path(filename_failed);
- strlcpy(target, sysfs_path, sizeof(target));
- strlcat(target, msg->devpath, sizeof(target));
create_path(filename);
- symlink(target, filename);
- return;
+ selinux_setfscreatecon(filename, NULL, S_IFLNK);
+ symlink(msg->devpath, filename);
+ selinux_resetfscreatecon();
+ break;
case EVENT_FINISHED:
- case EVENT_FAILED:
- unlink(filename_failed);
- delete_path(filename_failed);
-
- /* don't remove, if events for the same path are still pending */
- list_for_each_entry(loop_msg, &running_list, node)
- if (loop_msg->devpath && strcmp(loop_msg->devpath, msg->devpath) == 0)
- return;
-
- list_for_each_entry(loop_msg, &exec_list, node)
- if (loop_msg->devpath && strcmp(loop_msg->devpath, msg->devpath) == 0)
- return;
-
- /* move failed events to the failed directory */
- if (state == EVENT_FAILED) {
- create_path(filename_failed);
- rename(filename, filename_failed);
+ if (msg->devpath_old != NULL) {
+ /* "move" event - rename failed file to current name, do not delete failed */
+ char filename_failed_old[PATH_SIZE];
+
+ strlcpy(filename_failed_old, udev_root, sizeof(filename_failed_old));
+ strlcat(filename_failed_old, "/", sizeof(filename_failed_old));
+ start = strlcat(filename_failed_old, EVENT_FAILED_DIR"/", sizeof(filename_failed_old));
+ strlcat(filename_failed_old, msg->devpath_old, sizeof(filename_failed_old));
+ path_encode(&filename_failed_old[start], sizeof(filename) - start);
+
+ if (rename(filename_failed_old, filename_failed) == 0)
+ info("renamed devpath, moved failed state of '%s' to %s'\n",
+ msg->devpath_old, msg->devpath);
} else {
- unlink(filename);
+ unlink(filename_failed);
+ delete_path(filename_failed);
}
- /* clean up the queue directory */
+ unlink(filename);
delete_path(filename);
+ break;
+ case EVENT_FAILED:
+ /* move failed event to the failed directory */
+ create_path(filename_failed);
+ rename(filename, filename_failed);
- return;
+ /* clean up possibly empty queue directory */
+ delete_path(filename);
+ break;
}
+
+ return;
}
-static void msg_queue_delete(struct uevent_msg *msg)
+static void msg_queue_delete(struct udevd_uevent_msg *msg)
{
list_del(&msg->node);
- /* mark as failed, if add event returns non-zero */
+ /* mark as failed, if "add" event returns non-zero */
if (msg->exitstatus && strcmp(msg->action, "add") == 0)
export_event_state(msg, EVENT_FAILED);
else
free(msg);
}
-static void udev_event_run(struct uevent_msg *msg)
+static void udev_event_run(struct udevd_uevent_msg *msg)
{
pid_t pid;
int retval;
logging_init("udevd-event");
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
+
retval = udev_event_process(msg);
- info("seq %llu finished", msg->seqnum);
+ info("seq %llu finished with %i\n", msg->seqnum, retval);
logging_close();
if (retval)
exit(1);
exit(0);
case -1:
- err("fork of child failed: %s", strerror(errno));
+ err("fork of child failed: %s\n", strerror(errno));
msg_queue_delete(msg);
break;
default:
/* get SIGCHLD in main loop */
- info("seq %llu forked, pid [%d], '%s' '%s', %ld seconds old",
+ info("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;
}
}
-static void msg_queue_insert(struct uevent_msg *msg)
+static void msg_queue_insert(struct udevd_uevent_msg *msg)
{
char filename[PATH_SIZE];
int fd;
msg->queue_time = time(NULL);
+ export_event_state(msg, EVENT_QUEUED);
+ info("seq %llu queued, '%s' '%s'\n", msg->seqnum, msg->action, msg->subsystem);
+
strlcpy(filename, udev_root, sizeof(filename));
strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
close(fd);
}
- export_event_state(msg, EVENT_QUEUED);
+ /* 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;
+ }
/* run all events with a timeout set immediately */
if (msg->timeout != 0) {
run_exec_q = 1;
}
-/* runs event and removes event from run queue when finished */
-static int running_processes(void)
+static int mem_size_mb(void)
{
- int f;
- static char buf[4096];
- int len;
- int running;
- const char *pos;
+ FILE* f;
+ char buf[4096];
+ long int memsize = -1;
- f = open("/proc/stat", O_RDONLY);
- if (f == -1)
+ f = fopen("/proc/meminfo", "r");
+ if (f == NULL)
return -1;
- len = read(f, buf, sizeof(buf)-1);
- close(f);
+ while (fgets(buf, sizeof(buf), f) != NULL) {
+ long int value;
+
+ if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) {
+ memsize = value / 1024;
+ break;
+ }
+ }
+
+ fclose(f);
+ return memsize;
+}
+
+static int cpu_count(void)
+{
+ FILE* f;
+ char buf[4096];
+ int count = 0;
- if (len <= 0)
+ f = fopen("/proc/stat", "r");
+ if (f == NULL)
return -1;
- else
- buf[len] = '\0';
- pos = strstr(buf, "procs_running ");
- if (pos == NULL)
+ 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;
- if (sscanf(pos, "procs_running %u", &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 0;
}
-/* returns still running task for the same device, its parent or its physical device */
-static int running_with_devpath(struct uevent_msg *msg, int limit)
+/* lookup event for identical, parent, child, or physical device */
+static int devpath_busy(struct udevd_uevent_msg *msg, int limit)
{
- struct uevent_msg *loop_msg;
+ 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("%llu, device event still pending %llu (%s)\n",
+ msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
+ return 3;
+ }
+
+ /* check for our major:minor number */
+ if (msg->devt && loop_msg->devt == msg->devt &&
+ strcmp(msg->subsystem, loop_msg->subsystem) == 0) {
+ dbg("%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("%llu, physical device event still pending %llu (%s)\n",
+ msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
+ return 5;
+ }
+ }
+
+ /* check run queue for still running events */
list_for_each_entry(loop_msg, &running_list, node) {
if (limit && childs_count++ > limit) {
- dbg("%llu, maximum number (%i) of child reached", msg->seqnum, childs_count);
+ dbg("%llu, maximum number (%i) of childs reached\n", msg->seqnum, childs_count);
return 1;
}
- /* return running parent/child device event */
+ /* 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("%llu, child device event still running %llu (%s)",
+ dbg("%llu, device event still running %llu (%s)\n",
msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
- return 2;
+ return 3;
+ }
+
+ /* check for our major:minor number */
+ if (msg->devt && loop_msg->devt == msg->devt &&
+ strcmp(msg->subsystem, loop_msg->subsystem) == 0) {
+ dbg("%llu, device event still running %llu (%d:%d)\n", msg->seqnum,
+ loop_msg->seqnum, major(loop_msg->devt), minor(loop_msg->devt));
+ return 4;
}
- /* return running physical device event */
+ /* 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("%llu, physical device event still running %llu (%s)",
+ dbg("%llu, physical device event still running %llu (%s)\n",
msg->seqnum, loop_msg->seqnum, loop_msg->devpath);
- return 3;
+ return 5;
}
}
-
return 0;
}
-/* exec queue management routine executes the events and serializes events in the same sequence */
+/* serializes events for the identical and parent and child devices */
static void msg_queue_manager(void)
{
- struct uevent_msg *loop_msg;
- struct uevent_msg *tmp_msg;
+ struct udevd_uevent_msg *loop_msg;
+ struct udevd_uevent_msg *tmp_msg;
int running;
if (list_empty(&exec_list))
return;
running = running_processes();
- dbg("%d processes runnning on system", running);
+ dbg("%d processes runnning on system\n", running);
if (running < 0)
running = max_childs_running;
/* 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("at least %d processes running in session", running);
+ dbg("at least %d processes running in session\n", running);
if (running >= max_childs_running) {
- dbg("delay seq %llu, too many processes already running", loop_msg->seqnum);
+ dbg("delay seq %llu, too many processes already running\n", loop_msg->seqnum);
return;
}
}
- /* don't run two processes for the same devpath and wait for the parent*/
- if (running_with_devpath(loop_msg, max_childs)) {
- dbg("delay seq %llu (%s)", loop_msg->seqnum, loop_msg->devpath);
+ /* serialize and wait for parent or child events */
+ if (devpath_busy(loop_msg, max_childs) != 0) {
+ dbg("delay seq %llu (%s)\n", loop_msg->seqnum, loop_msg->devpath);
continue;
}
list_move_tail(&loop_msg->node, &running_list);
udev_event_run(loop_msg);
running++;
- dbg("moved seq %llu to running list", loop_msg->seqnum);
+ dbg("moved seq %llu to running list\n", loop_msg->seqnum);
}
}
-static struct uevent_msg *get_msg_from_envbuf(const char *buf, int buf_size)
+static struct udevd_uevent_msg *get_msg_from_envbuf(const char *buf, int buf_size)
{
int bufpos;
int i;
- struct uevent_msg *msg;
- int major = 0;
- int minor = 0;
+ struct udevd_uevent_msg *msg;
+ char *physdevdriver_key = NULL;
+ int maj = 0;
+ int min = 0;
- msg = malloc(sizeof(struct uevent_msg) + buf_size);
+ msg = malloc(sizeof(struct udevd_uevent_msg) + buf_size);
if (msg == NULL)
return NULL;
- memset(msg, 0x00, sizeof(struct uevent_msg) + buf_size);
+ memset(msg, 0x00, sizeof(struct udevd_uevent_msg) + buf_size);
/* copy environment buffer and reconstruct envp */
memcpy(msg->envbuf, buf, buf_size);
keylen = strlen(key);
msg->envp[i] = key;
bufpos += keylen + 1;
- dbg("add '%s' to msg.envp[%i]", msg->envp[i], i);
+ dbg("add '%s' to msg.envp[%i]\n", msg->envp[i], i);
/* remember some keys for further processing */
if (strncmp(key, "ACTION=", 7) == 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)
- major = strtoull(&key[6], NULL, 10);
+ maj = strtoull(&key[6], NULL, 10);
else if (strncmp(key, "MINOR=", 6) == 0)
- minor = strtoull(&key[6], NULL, 10);
+ min = strtoull(&key[6], NULL, 10);
else if (strncmp(key, "TIMEOUT=", 8) == 0)
msg->timeout = strtoull(&key[8], NULL, 10);
}
- msg->devt = makedev(major, minor);
+ msg->devt = makedev(maj, min);
msg->envp[i++] = "UDEVD_EVENT=1";
+
+ 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];
+ }
+
msg->envp[i] = NULL;
if (msg->devpath == NULL || msg->action == NULL) {
- info("DEVPATH or ACTION missing, ignore message");
+ info("DEVPATH or ACTION missing, ignore message\n");
free(msg);
return NULL;
}
}
/* receive the udevd message from userspace */
-static struct uevent_msg *get_udevd_msg(void)
+static void get_ctrl_msg(void)
{
- static struct udevd_msg usend_msg;
- struct uevent_msg *msg;
+ struct udevd_ctrl_msg ctrl_msg;
ssize_t size;
struct msghdr smsg;
struct cmsghdr *cmsg;
struct iovec iov;
struct ucred *cred;
char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
- int envbuf_size;
int *intval;
+ char *pos;
- memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
- iov.iov_base = &usend_msg;
- iov.iov_len = sizeof(struct udevd_msg);
+ memset(&ctrl_msg, 0x00, sizeof(struct udevd_ctrl_msg));
+ iov.iov_base = &ctrl_msg;
+ iov.iov_len = sizeof(struct udevd_ctrl_msg);
memset(&smsg, 0x00, sizeof(struct msghdr));
smsg.msg_iov = &iov;
size = recvmsg(udevd_sock, &smsg, 0);
if (size < 0) {
if (errno != EINTR)
- err("unable to receive user udevd message: %s", strerror(errno));
- return NULL;
+ err("unable to receive user udevd message: %s\n", strerror(errno));
+ return;
}
cmsg = CMSG_FIRSTHDR(&smsg);
cred = (struct ucred *) CMSG_DATA(cmsg);
if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) {
- err("no sender credentials received, message ignored");
- return NULL;
+ err("no sender credentials received, message ignored\n");
+ return;
}
if (cred->uid != 0) {
- err("sender uid=%i, message ignored", cred->uid);
- return NULL;
+ err("sender uid=%i, message ignored\n", cred->uid);
+ return;
}
- if (strncmp(usend_msg.magic, UDEV_MAGIC, sizeof(UDEV_MAGIC)) != 0 ) {
- err("message magic '%s' doesn't match, ignore it", usend_msg.magic);
- return NULL;
+ if (strncmp(ctrl_msg.magic, UDEVD_CTRL_MAGIC, sizeof(UDEVD_CTRL_MAGIC)) != 0 ) {
+ err("message magic '%s' doesn't match, ignore it\n", ctrl_msg.magic);
+ return;
}
- switch (usend_msg.type) {
- case UDEVD_UEVENT_UDEVSEND:
- info("udevd event message received");
- envbuf_size = size - offsetof(struct udevd_msg, envbuf);
- dbg("envbuf_size=%i", envbuf_size);
- msg = get_msg_from_envbuf(usend_msg.envbuf, envbuf_size);
- if (msg == NULL)
- return NULL;
- msg->type = usend_msg.type;
- return msg;
- case UDEVD_STOP_EXEC_QUEUE:
- info("udevd message (STOP_EXEC_QUEUE) received");
+ switch (ctrl_msg.type) {
+ case UDEVD_CTRL_ENV:
+ pos = strchr(ctrl_msg.buf, '=');
+ if (pos == NULL) {
+ err("wrong key format '%s'\n", ctrl_msg.buf);
+ break;
+ }
+ pos[0] = '\0';
+ if (pos[1] == '\0') {
+ info("udevd message (ENV) received, unset '%s'\n", ctrl_msg.buf);
+ unsetenv(ctrl_msg.buf);
+ } else {
+ info("udevd message (ENV) received, set '%s=%s'\n", ctrl_msg.buf, &pos[1]);
+ setenv(ctrl_msg.buf, &pos[1], 1);
+ }
+ break;
+ case UDEVD_CTRL_STOP_EXEC_QUEUE:
+ info("udevd message (STOP_EXEC_QUEUE) received\n");
stop_exec_q = 1;
break;
- case UDEVD_START_EXEC_QUEUE:
- info("udevd message (START_EXEC_QUEUE) received");
+ case UDEVD_CTRL_START_EXEC_QUEUE:
+ info("udevd message (START_EXEC_QUEUE) received\n");
stop_exec_q = 0;
msg_queue_manager();
break;
- case UDEVD_SET_LOG_LEVEL:
- intval = (int *) usend_msg.envbuf;
- info("udevd message (SET_LOG_PRIORITY) received, udev_log_priority=%i", *intval);
+ case UDEVD_CTRL_SET_LOG_LEVEL:
+ intval = (int *) ctrl_msg.buf;
+ info("udevd message (SET_LOG_PRIORITY) received, udev_log_priority=%i\n", *intval);
udev_log_priority = *intval;
sprintf(udev_log, "UDEV_LOG=%i", udev_log_priority);
putenv(udev_log);
break;
- case UDEVD_SET_MAX_CHILDS:
- intval = (int *) usend_msg.envbuf;
- info("udevd message (UDEVD_SET_MAX_CHILDS) received, max_childs=%i", *intval);
+ case UDEVD_CTRL_SET_MAX_CHILDS:
+ intval = (int *) ctrl_msg.buf;
+ info("udevd message (UDEVD_SET_MAX_CHILDS) received, max_childs=%i\n", *intval);
max_childs = *intval;
break;
- case UDEVD_RELOAD_RULES:
- info("udevd message (RELOAD_RULES) received");
+ case UDEVD_CTRL_SET_MAX_CHILDS_RUNNING:
+ intval = (int *) ctrl_msg.buf;
+ info("udevd message (UDEVD_SET_MAX_CHILDS_RUNNING) received, max_childs=%i\n", *intval);
+ max_childs_running = *intval;
+ break;
+ case UDEVD_CTRL_RELOAD_RULES:
+ info("udevd message (RELOAD_RULES) received\n");
reload_config = 1;
break;
default:
- dbg("unknown message type");
+ err("unknown control message type\n");
}
- return NULL;
}
/* receive the kernel user event message and do some sanity checks */
-static struct uevent_msg *get_netlink_msg(void)
+static struct udevd_uevent_msg *get_netlink_msg(void)
{
- struct uevent_msg *msg;
+ struct udevd_uevent_msg *msg;
int bufpos;
ssize_t size;
static char buffer[UEVENT_BUFFER_SIZE+512];
size = recv(uevent_netlink_sock, &buffer, sizeof(buffer), 0);
if (size < 0) {
if (errno != EINTR)
- err("unable to receive kernel netlink message: %s", strerror(errno));
+ err("unable to receive kernel netlink message: %s\n", strerror(errno));
return NULL;
}
if ((size_t)size > sizeof(buffer)-1)
size = sizeof(buffer)-1;
buffer[size] = '\0';
- dbg("uevent_size=%zi", size);
+ dbg("uevent_size=%zi\n", size);
/* start of event payload */
bufpos = strlen(buffer)+1;
msg = get_msg_from_envbuf(&buffer[bufpos], size-bufpos);
if (msg == NULL)
return NULL;
- msg->type = UDEVD_UEVENT_NETLINK;
/* validate message */
pos = strchr(buffer, '@');
if (pos == NULL) {
- err("invalid uevent '%s'", buffer);
+ err("invalid uevent '%s'\n", buffer);
free(msg);
return NULL;
}
pos[0] = '\0';
if (msg->action == NULL) {
- info("no ACTION in payload found, skip event '%s'", buffer);
+ info("no ACTION in payload found, skip event '%s'\n", buffer);
free(msg);
return NULL;
}
if (strcmp(msg->action, buffer) != 0) {
- err("ACTION in payload does not match uevent, skip event '%s'", buffer);
+ err("ACTION in payload does not match uevent, skip event '%s'\n", buffer);
free(msg);
return NULL;
}
static void udev_done(int pid, int exitstatus)
{
/* find msg associated with pid and delete it */
- struct uevent_msg *msg;
+ struct udevd_uevent_msg *msg;
list_for_each_entry(msg, &running_list, node) {
if (msg->pid == pid) {
- info("seq %llu, pid [%d] exit with %i, %ld seconds old", msg->seqnum, msg->pid,
+ info("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);
static int init_udevd_socket(void)
{
struct sockaddr_un saddr;
- const int buffersize = 16 * 1024 * 1024;
socklen_t addrlen;
const int feature_on = 1;
int retval;
memset(&saddr, 0x00, sizeof(saddr));
saddr.sun_family = AF_LOCAL;
/* use abstract namespace for socket path */
- strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
- addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+ strcpy(&saddr.sun_path[1], UDEVD_CTRL_SOCK_PATH);
+ addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
udevd_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
if (udevd_sock == -1) {
- err("error getting socket: %s", strerror(errno));
+ err("error getting socket: %s\n", strerror(errno));
return -1;
}
- /* set receive buffersize */
- setsockopt(udevd_sock, SOL_SOCKET, SO_RCVBUFFORCE, &buffersize, sizeof(buffersize));
-
/* the bind takes care of ensuring only one copy running */
retval = bind(udevd_sock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
- err("bind failed: %s", strerror(errno));
+ err("bind failed: %s\n", strerror(errno));
+ close(udevd_sock);
+ udevd_sock = -1;
return -1;
}
memset(&snl, 0x00, sizeof(struct sockaddr_nl));
snl.nl_family = AF_NETLINK;
snl.nl_pid = getpid();
- snl.nl_groups = 0xffffffff;
+ snl.nl_groups = 1;
uevent_netlink_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if (uevent_netlink_sock == -1) {
- err("error getting socket: %s", strerror(errno));
+ err("error getting socket: %s\n", strerror(errno));
return -1;
}
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl, sizeof(struct sockaddr_nl));
if (retval < 0) {
- err("bind failed: %s", strerror(errno));
+ err("bind failed: %s\n", strerror(errno));
close(uevent_netlink_sock);
uevent_netlink_sock = -1;
return -1;
}
strlcpy(filename, udev_root, sizeof(filename));
strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
+ create_path(filename);
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd >= 0) {
write(fd, seqnum, len);
fd_set readfds;
const char *value;
int daemonize = 0;
- int i;
- int rc = 0;
+ int option;
+ 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' },
+ {}
+ };
+ int rc = 1;
int maxfd;
- /* redirect std fd's, if the kernel forks us, we don't have them at all */
- fd = open("/dev/null", O_RDWR);
- if (fd >= 0) {
- if (fd != STDIN_FILENO)
- dup2(fd, STDIN_FILENO);
- if (fd != STDOUT_FILENO)
- dup2(fd, STDOUT_FILENO);
- if (fd != STDERR_FILENO)
- dup2(fd, STDERR_FILENO);
- if (fd > STDERR_FILENO)
- close(fd);
- }
-
logging_init("udevd");
- if (fd < 0)
- err("fatal, could not open /dev/null: %s", strerror(errno));
-
udev_config_init();
- dbg("version %s", UDEV_VERSION);
+ selinux_init();
+ dbg("version %s\n", UDEV_VERSION);
+
+ while (1) {
+ option = getopt_long(argc, argv, "dDthV", options, NULL);
+ if (option == -1)
+ break;
+
+ switch (option) {
+ case 'd':
+ daemonize = 1;
+ break;
+ case 't':
+ debug_trace = 1;
+ break;
+ case 'D':
+ debug = 1;
+ if (udev_log_priority < LOG_INFO)
+ udev_log_priority = LOG_INFO;
+ break;
+ case 'h':
+ printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--debug] [--version]\n");
+ goto exit;
+ case 'V':
+ printf("%s\n", UDEV_VERSION);
+ goto exit;
+ default:
+ goto exit;
+ }
+ }
if (getuid() != 0) {
- err("need to be root, exit");
+ fprintf(stderr, "root privileges required\n");
+ err("root privileges required\n");
goto exit;
}
- /* parse commandline options */
- for (i = 1 ; i < argc; i++) {
- char *arg = argv[i];
- if (strcmp(arg, "--daemon") == 0 || strcmp(arg, "-d") == 0) {
- info("will daemonize");
- daemonize = 1;
- }
- if (strcmp(arg, "--stop-exec-queue") == 0) {
- info("will not execute events until START_EXEC_QUEUE is received");
- stop_exec_q = 1;
- }
+ /* make sure std{in,out,err} fd's are in a sane state */
+ fd = open("/dev/null", O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "cannot open /dev/null\n");
+ err("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)
+ dup2(fd, STDERR_FILENO);
/* init sockets to receive events */
if (init_udevd_socket() < 0) {
if (errno == EADDRINUSE) {
- err("another udevd running, exit");
+ fprintf(stderr, "another udev daemon already running\n");
+ err("another udev daemon already running\n");
rc = 1;
} else {
- err("error initializing udevd socket: %s", strerror(errno));
+ fprintf(stderr, "error initializing udevd socket\n");
+ err("error initializing udevd socket\n");
rc = 2;
}
goto exit;
}
if (init_uevent_netlink_sock() < 0) {
- err("uevent socket not available");
+ fprintf(stderr, "error initializing netlink socket\n");
+ err("error initializing netlink socket\n");
rc = 3;
goto exit;
}
- /* parse the rules and keep it in memory */
+ /* setup signal handler pipe */
+ retval = pipe(signal_pipe);
+ if (retval < 0) {
+ err("error getting pipes: %s\n", strerror(errno));
+ goto exit;
+ }
+
+ retval = fcntl(signal_pipe[READ_END], F_GETFL, 0);
+ if (retval < 0) {
+ err("error fcntl on read pipe: %s\n", strerror(errno));
+ goto exit;
+ }
+ retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK);
+ if (retval < 0) {
+ err("error fcntl on read pipe: %s\n", strerror(errno));
+ goto exit;
+ }
+
+ retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0);
+ if (retval < 0) {
+ err("error fcntl on write pipe: %s\n", strerror(errno));
+ goto exit;
+ }
+ retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK);
+ if (retval < 0) {
+ err("error fcntl on write pipe: %s\n", strerror(errno));
+ goto exit;
+ }
+
+ /* parse the rules and keep them in memory */
sysfs_init();
udev_rules_init(&rules, 1);
pid = fork();
switch (pid) {
case 0:
- dbg("daemonized fork running");
+ dbg("daemonized fork running\n");
break;
case -1:
- err("fork of daemon failed: %s", strerror(errno));
+ err("fork of daemon failed: %s\n", strerror(errno));
rc = 4;
goto exit;
default:
- dbg("child [%u] running, parent exits", pid);
+ dbg("child [%u] running, parent exits\n", pid);
+ rc = 0;
goto exit;
}
}
+ /* redirect std{out,err} fd's */
+ if (!debug)
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ if (fd > STDERR_FILENO)
+ close(fd);
+
/* set scheduling priority for the daemon */
setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
/* become session leader */
sid = setsid();
- dbg("our session is %d", sid);
+ dbg("our session is %d\n", sid);
/* OOM_DISABLE == -17 */
fd = open("/proc/self/oom_adj", O_RDWR);
if (fd < 0)
- err("error disabling OOM: %s", strerror(errno));
+ err("error disabling OOM: %s\n", strerror(errno));
else {
write(fd, "-17", 3);
close(fd);
}
- /* setup signal handler pipe */
- retval = pipe(signal_pipe);
- if (retval < 0) {
- err("error getting pipes: %s", strerror(errno));
- goto exit;
- }
+ fd = open("/dev/kmsg", O_WRONLY);
+ if (fd > 0) {
+ const char *str = "<6>udevd version " UDEV_VERSION " started\n";
- retval = fcntl(signal_pipe[READ_END], F_GETFL, 0);
- if (retval < 0) {
- err("error fcntl on read pipe: %s", strerror(errno));
- goto exit;
- }
- retval = fcntl(signal_pipe[READ_END], F_SETFL, retval | O_NONBLOCK);
- if (retval < 0) {
- err("error fcntl on read pipe: %s", strerror(errno));
- goto exit;
- }
-
- retval = fcntl(signal_pipe[WRITE_END], F_GETFL, 0);
- if (retval < 0) {
- err("error fcntl on write pipe: %s", strerror(errno));
- goto exit;
- }
- retval = fcntl(signal_pipe[WRITE_END], F_SETFL, retval | O_NONBLOCK);
- if (retval < 0) {
- err("error fcntl on write pipe: %s", strerror(errno));
- goto exit;
+ write(fd, str, strlen(str));
+ close(fd);
}
/* set signal handlers */
/* watch rules directory */
inotify_fd = inotify_init();
- if (inotify_fd >= 0)
- inotify_add_watch(inotify_fd, udev_rules_filename, IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
- else if (errno == ENOSYS)
- err("the kernel does not support inotify, udevd can't monitor configuration file changes");
+ if (inotify_fd >= 0) {
+ char filename[PATH_MAX];
+
+ inotify_add_watch(inotify_fd, udev_rules_dir, IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+
+ /* watch dynamic rules directory */
+ strlcpy(filename, udev_root, sizeof(filename));
+ strlcat(filename, "/"RULES_DYN_DIR, sizeof(filename));
+ inotify_add_watch(inotify_fd, filename, IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
+ } else if (errno == ENOSYS)
+ err("the kernel does not support inotify, udevd can't monitor rules file changes\n");
else
- err("inotify_init failed: %s", strerror(errno));
+ err("inotify_init failed: %s\n", strerror(errno));
/* maximum limit of forked childs */
value = getenv("UDEVD_MAX_CHILDS");
if (value)
max_childs = strtoul(value, NULL, 10);
- else
- max_childs = UDEVD_MAX_CHILDS;
- info("initialize max_childs to %u", max_childs);
+ else {
+ int memsize = mem_size_mb();
+ if (memsize > 0)
+ max_childs = 128 + (memsize / 4);
+ else
+ max_childs = UDEVD_MAX_CHILDS;
+ }
+ info("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
- max_childs_running = UDEVD_MAX_CHILDS_RUNNING;
- info("initialize max_childs_running to %u", max_childs_running);
+ else {
+ int cpus = cpu_count();
+ if (cpus > 0)
+ max_childs_running = 8 + (8 * cpus);
+ else
+ max_childs_running = UDEVD_MAX_CHILDS_RUNNING;
+ }
+ info("initialize max_childs_running to %u\n", max_childs_running);
/* clear environment for forked event processes */
clearenv();
/* export log_priority , as called programs may want to follow that setting */
sprintf(udev_log, "UDEV_LOG=%i", udev_log_priority);
putenv(udev_log);
+ if (debug_trace)
+ putenv("DEBUG=1");
maxfd = udevd_sock;
maxfd = UDEV_MAX(maxfd, uevent_netlink_sock);
maxfd = UDEV_MAX(maxfd, inotify_fd);
while (!udev_exit) {
- struct uevent_msg *msg;
+ struct udevd_uevent_msg *msg;
int fdcount;
FD_ZERO(&readfds);
fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL);
if (fdcount < 0) {
if (errno != EINTR)
- err("error in select: %s", strerror(errno));
+ err("error in select: %s\n", strerror(errno));
continue;
}
- /* get user socket message */
- if (FD_ISSET(udevd_sock, &readfds)) {
- msg = get_udevd_msg();
- if (msg)
- msg_queue_insert(msg);
- }
+ /* get control message */
+ if (FD_ISSET(udevd_sock, &readfds))
+ get_ctrl_msg();
- /* get kernel netlink message */
+ /* get netlink message */
if (FD_ISSET(uevent_netlink_sock, &readfds)) {
msg = get_netlink_msg();
if (msg)
int nbytes;
/* discard all possible events, we can just reload the config */
- if ((ioctl(inotify_fd, FIONREAD, &nbytes) == 0) && nbytes) {
+ if ((ioctl(inotify_fd, FIONREAD, &nbytes) == 0) && nbytes > 0) {
char *buf;
reload_config = 1;
buf = malloc(nbytes);
- if (!buf) {
- err("error getting buffer for inotify, disable watching");
+ if (buf == NULL) {
+ err("error getting buffer for inotify, disable watching\n");
close(inotify_fd);
inotify_fd = -1;
}
}
}
- /* rules changed, set by inotify or a signal*/
+ /* rules changed, set by inotify or a HUP signal */
if (reload_config) {
reload_config = 0;
udev_rules_cleanup(&rules);
msg_queue_manager();
}
}
+ rc = 0;
exit:
udev_rules_cleanup(&rules);
sysfs_cleanup();
+ selinux_exit();
if (signal_pipe[READ_END] >= 0)
close(signal_pipe[READ_END]);
~ianmdlvl / elogind.git / blobdiff