X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udevd.c;h=705e2a97800c1f2164df5b8d9149794258ef0b9c;hp=446db8fd33f31a924a86f9c02eed2fd4ea4c4611;hb=2bac6c64aa7808cafd7706d56887a97ba9f7817d;hpb=8813e55c74d8224a361f62fc8c9f01591dfb58d3 diff --git a/udevd.c b/udevd.c index 446db8fd3..705e2a978 100644 --- a/udevd.c +++ b/udevd.c @@ -42,16 +42,11 @@ #include #include -#include "list.h" -#include "udev_libc_wrapper.h" #include "udev.h" -#include "udev_version.h" #include "udev_rules.h" -#include "udev_utils.h" #include "udevd.h" -#include "logging.h" -struct udev_rules rules; +static struct udev_rules rules; static int udevd_sock; static int uevent_netlink_sock; static int inotify_fd; @@ -94,8 +89,7 @@ static void asmlinkage udev_event_sig_handler(int signum) static int udev_event_process(struct uevent_msg *msg) { struct sigaction act; - struct udevice udev; - struct name_entry *name_loop; + struct udevice *udev; int i; int retval; @@ -106,30 +100,50 @@ static int udev_event_process(struct uevent_msg *msg) 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_ALARM_TIMEOUT); - /* reconstruct env from message */ + /* reconstruct event environment from message */ for (i = 0; msg->envp[i]; i++) putenv(msg->envp[i]); - udev_init_device(&udev, msg->devpath, msg->subsystem, msg->action); - retval = udev_process_event(&rules, &udev); + udev = udev_device_init(); + if (udev == NULL) + return -1; + strlcpy(udev->action, msg->action, sizeof(udev->action)); + sysfs_device_set_values(udev->dev, msg->devpath, msg->subsystem); + udev->devt = msg->devt; + + retval = udev_device_event(&rules, udev); /* run programs collected by RUN-key*/ - if (!retval) { - list_for_each_entry(name_loop, &udev.run_list, node) { + 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:")], msg->devpath, msg->action); - else - if (run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, + 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; + } } } - udev_cleanup_device(&udev); - + udev_device_cleanup(udev); return retval; } @@ -176,6 +190,7 @@ static void export_event_state(struct uevent_msg *msg, enum event_state state) switch (state) { case EVENT_QUEUED: unlink(filename_failed); + delete_path(filename_failed); strlcpy(target, sysfs_path, sizeof(target)); strlcat(target, msg->devpath, sizeof(target)); @@ -183,17 +198,30 @@ static void export_event_state(struct uevent_msg *msg, enum event_state state) symlink(target, filename); return; 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 */ + /* 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; - unlink(filename); - return; - case EVENT_FAILED: - create_path(filename_failed); - rename(filename, filename_failed); + + 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); + } else { + unlink(filename); + } + + /* clean up the queue directory */ + delete_path(filename); + return; } } @@ -222,7 +250,7 @@ static void udev_event_run(struct uevent_msg *msg) /* child */ close(uevent_netlink_sock); close(udevd_sock); - if (inotify_fd > 0) + if (inotify_fd >= 0) close(inotify_fd); close(signal_pipe[READ_END]); close(signal_pipe[WRITE_END]); @@ -251,8 +279,23 @@ static void udev_event_run(struct uevent_msg *msg) static void msg_queue_insert(struct uevent_msg *msg) { + char filename[PATH_SIZE]; + int fd; + msg->queue_time = time(NULL); + strlcpy(filename, udev_root, sizeof(filename)); + strlcat(filename, "/" EVENT_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); + write(fd, str, len); + close(fd); + } + export_event_state(msg, EVENT_QUEUED); /* run all events with a timeout set immediately */ @@ -505,12 +548,11 @@ static struct uevent_msg *get_msg_from_envbuf(const char *buf, int buf_size) msg->envp[i++] = "UDEVD_EVENT=1"; msg->envp[i] = NULL; - if (!msg->devpath) { - info("DEVPATH missing, ignore message"); + if (msg->devpath == NULL || msg->action == NULL) { + info("DEVPATH or ACTION missing, ignore message"); free(msg); return NULL; } - return msg; } @@ -541,7 +583,7 @@ static struct uevent_msg *get_udevd_msg(void) size = recvmsg(udevd_sock, &smsg, 0); if (size < 0) { if (errno != EINTR) - err("unable to receive udevd message: %s", strerror(errno)); + err("unable to receive user udevd message: %s", strerror(errno)); return NULL; } cmsg = CMSG_FIRSTHDR(&smsg); @@ -564,7 +606,6 @@ static struct uevent_msg *get_udevd_msg(void) switch (usend_msg.type) { case UDEVD_UEVENT_UDEVSEND: - case UDEVD_UEVENT_INITSEND: info("udevd event message received"); envbuf_size = size - offsetof(struct udevd_msg, envbuf); dbg("envbuf_size=%i", envbuf_size); @@ -610,13 +651,13 @@ static struct uevent_msg *get_netlink_msg(void) struct uevent_msg *msg; int bufpos; ssize_t size; - static char buffer[UEVENT_BUFFER_SIZE + 512]; + 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("unable to receive udevd message: %s", strerror(errno)); + err("unable to receive kernel netlink message: %s", strerror(errno)); return NULL; } @@ -780,6 +821,34 @@ static int init_uevent_netlink_sock(void) return 0; } +static void export_initial_seqnum(void) +{ + char filename[PATH_SIZE]; + int fd; + char seqnum[32]; + ssize_t len = 0; + + strlcpy(filename, sysfs_path, sizeof(filename)); + strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename)); + fd = open(filename, O_RDONLY); + if (fd >= 0) { + len = read(fd, seqnum, sizeof(seqnum)-1); + close(fd); + } + if (len <= 0) { + strcpy(seqnum, "0\n"); + len = 3; + } + 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); + close(fd); + } +} + int main(int argc, char *argv[], char *envp[]) { int retval; @@ -809,7 +878,7 @@ int main(int argc, char *argv[], char *envp[]) if (fd < 0) err("fatal, could not open /dev/null: %s", strerror(errno)); - udev_init_config(); + udev_config_init(); dbg("version %s", UDEV_VERSION); if (getuid() != 0) { @@ -849,8 +918,11 @@ int main(int argc, char *argv[], char *envp[]) } /* parse the rules and keep it in memory */ + sysfs_init(); udev_rules_init(&rules, 1); + export_initial_seqnum(); + if (daemonize) { pid_t pid; @@ -894,12 +966,24 @@ int main(int argc, char *argv[], char *envp[]) err("error getting pipes: %s", strerror(errno)); goto exit; } - retval = fcntl(signal_pipe[READ_END], F_SETFL, O_NONBLOCK); + + 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_SETFL, O_NONBLOCK); + + 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; @@ -917,8 +1001,12 @@ int main(int argc, char *argv[], char *envp[]) /* watch rules directory */ inotify_fd = inotify_init(); - if (inotify_fd > 0) + 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"); + else + err("inotify_init failed: %s", strerror(errno)); /* maximum limit of forked childs */ value = getenv("UDEVD_MAX_CHILDS"); @@ -956,7 +1044,7 @@ int main(int argc, char *argv[], char *envp[]) FD_SET(signal_pipe[READ_END], &readfds); FD_SET(udevd_sock, &readfds); FD_SET(uevent_netlink_sock, &readfds); - if (inotify_fd > 0) + if (inotify_fd >= 0) FD_SET(inotify_fd, &readfds); fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL); @@ -969,13 +1057,8 @@ int main(int argc, char *argv[], char *envp[]) /* get user socket message */ if (FD_ISSET(udevd_sock, &readfds)) { msg = get_udevd_msg(); - if (msg) { - if (msg->type == UDEVD_UEVENT_UDEVSEND && msg->seqnum != 0) { - info("skip non-kernel message with SEQNUM"); - free(msg); - } else - msg_queue_insert(msg); - } + if (msg) + msg_queue_insert(msg); } /* get kernel netlink message */ @@ -993,7 +1076,7 @@ int main(int argc, char *argv[], char *envp[]) } /* rules directory inotify watch */ - if ((inotify_fd > 0) && FD_ISSET(inotify_fd, &readfds)) { + if ((inotify_fd >= 0) && FD_ISSET(inotify_fd, &readfds)) { int nbytes; /* discard all possible events, we can just reload the config */ @@ -1015,7 +1098,7 @@ int main(int argc, char *argv[], char *envp[]) /* rules changed, set by inotify or a signal*/ if (reload_config) { reload_config = 0; - udev_rules_close(&rules); + udev_rules_cleanup(&rules); udev_rules_init(&rules, 1); } @@ -1033,18 +1116,19 @@ int main(int argc, char *argv[], char *envp[]) } exit: - udev_rules_close(&rules); + udev_rules_cleanup(&rules); + sysfs_cleanup(); - if (signal_pipe[READ_END] > 0) + if (signal_pipe[READ_END] >= 0) close(signal_pipe[READ_END]); - if (signal_pipe[WRITE_END] > 0) + if (signal_pipe[WRITE_END] >= 0) close(signal_pipe[WRITE_END]); - if (udevd_sock > 0) + if (udevd_sock >= 0) close(udevd_sock); - if (inotify_fd > 0) + if (inotify_fd >= 0) close(inotify_fd); - if (uevent_netlink_sock > 0) + if (uevent_netlink_sock >= 0) close(uevent_netlink_sock); logging_close();