X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fudev%2Fudev-event.c;h=67fb1f78f5af880e58226f67027ed282f96c5e09;hp=efd9b6d71d84fdaff64887f5d8f975bd71ef5008;hb=b94da8cf72aa363582e0acae134d45c88d13bc75;hpb=090be8653471e1abe3f1cdd32eaad0fbd65f85cd diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c index efd9b6d71..67fb1f78f 100644 --- a/src/udev/udev-event.c +++ b/src/udev/udev-event.c @@ -23,48 +23,44 @@ #include #include #include -#include #include -#include #include -#include +#include #include #include -#include #include -#include #include "udev.h" +#include "rtnl-util.h" -struct udev_event *udev_event_new(struct udev_device *dev) -{ +struct udev_event *udev_event_new(struct udev_device *dev) { struct udev *udev = udev_device_get_udev(dev); struct udev_event *event; - event = calloc(1, sizeof(struct udev_event)); + event = new0(struct udev_event, 1); if (event == NULL) return NULL; event->dev = dev; event->udev = udev; udev_list_init(udev, &event->run_list, false); + udev_list_init(udev, &event->seclabel_list, false); event->fd_signal = -1; event->birth_usec = now(CLOCK_MONOTONIC); - event->timeout_usec = 30 * 1000 * 1000; return event; } -void udev_event_unref(struct udev_event *event) -{ +void udev_event_unref(struct udev_event *event) { if (event == NULL) return; + sd_rtnl_unref(event->rtnl); udev_list_cleanup(&event->run_list); + udev_list_cleanup(&event->seclabel_list); free(event->program_result); free(event->name); free(event); } -size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size) -{ +size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size) { struct udev_device *dev = event->dev; enum subst_type { SUBST_UNKNOWN, @@ -175,7 +171,7 @@ subst: from++; for (i = 0; from[i] != '}'; i++) { if (from[i] == '\0') { - log_error("missing closing brace for format '%s'\n", src); + log_error("missing closing brace for format '%s'", src); goto out; } } @@ -221,14 +217,14 @@ subst: case SUBST_MAJOR: { char num[UTIL_PATH_SIZE]; - sprintf(num, "%d", major(udev_device_get_devnum(dev))); + sprintf(num, "%u", major(udev_device_get_devnum(dev))); l = strpcpy(&s, l, num); break; } case SUBST_MINOR: { char num[UTIL_PATH_SIZE]; - sprintf(num, "%d", minor(udev_device_get_devnum(dev))); + sprintf(num, "%u", minor(udev_device_get_devnum(dev))); l = strpcpy(&s, l, num); break; } @@ -254,9 +250,11 @@ subst: cpos++; while (isspace(cpos[0])) cpos++; + if (cpos[0] == '\0') + break; } if (i > 0) { - log_error("requested part of result string not found\n"); + log_error("requested part of result string not found"); break; } strscpy(tmp, sizeof(tmp), cpos); @@ -279,7 +277,7 @@ subst: int count; if (attr == NULL) { - log_error("missing file parameter for attr\n"); + log_error("missing file parameter for attr"); break; } @@ -306,7 +304,7 @@ subst: vbuf[len] = '\0'; count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT); if (count > 0) - log_debug("%i character(s) replaced\n" , count); + log_debug("%i character(s) replaced" , count); l = strpcpy(&s, l, vbuf); break; } @@ -364,7 +362,7 @@ subst: break; } default: - log_error("unknown substitution type=%i\n", type); + log_error("unknown substitution type=%i", type); break; } } @@ -376,10 +374,8 @@ out: static int spawn_exec(struct udev_event *event, const char *cmd, char *const argv[], char **envp, const sigset_t *sigmask, - int fd_stdout, int fd_stderr) -{ - int err; - int fd; + int fd_stdout, int fd_stderr) { + _cleanup_close_ int fd = -1; /* discard child output or connect to pipe */ fd = open("/dev/null", O_RDWR); @@ -389,19 +385,17 @@ static int spawn_exec(struct udev_event *event, dup2(fd, STDOUT_FILENO); if (fd_stderr < 0) dup2(fd, STDERR_FILENO); - close(fd); - } else { - log_error("open /dev/null failed: %m\n"); - } + } else + log_error_errno(errno, "open /dev/null failed: %m"); /* connect pipes to std{out,err} */ if (fd_stdout >= 0) { dup2(fd_stdout, STDOUT_FILENO); - close(fd_stdout); + safe_close(fd_stdout); } if (fd_stderr >= 0) { dup2(fd_stderr, STDERR_FILENO); - close(fd_stderr); + safe_close(fd_stderr); } /* terminate child in case parent goes away */ @@ -414,19 +408,27 @@ static int spawn_exec(struct udev_event *event, execve(argv[0], argv, envp); /* exec failed */ - err = -errno; - log_error("failed to execute '%s' '%s': %m\n", argv[0], cmd); - return err; + log_error_errno(errno, "failed to execute '%s' '%s': %m", argv[0], cmd); + + return -errno; } static void spawn_read(struct udev_event *event, - const char *cmd, - int fd_stdout, int fd_stderr, - char *result, size_t ressize) -{ + usec_t timeout_usec, + const char *cmd, + int fd_stdout, int fd_stderr, + char *result, size_t ressize) { + _cleanup_close_ int fd_ep = -1; + struct epoll_event ep_outpipe = { + .events = EPOLLIN, + .data.ptr = &fd_stdout, + }; + struct epoll_event ep_errpipe = { + .events = EPOLLIN, + .data.ptr = &fd_stderr, + }; size_t respos = 0; - int fd_ep = -1; - struct epoll_event ep_outpipe, ep_errpipe; + int r; /* read from child if requested */ if (fd_stdout < 0 && fd_stderr < 0) @@ -434,27 +436,23 @@ static void spawn_read(struct udev_event *event, fd_ep = epoll_create1(EPOLL_CLOEXEC); if (fd_ep < 0) { - log_error("error creating epoll fd: %m\n"); - goto out; + log_error_errno(errno, "error creating epoll fd: %m"); + return; } if (fd_stdout >= 0) { - memset(&ep_outpipe, 0, sizeof(struct epoll_event)); - ep_outpipe.events = EPOLLIN; - ep_outpipe.data.ptr = &fd_stdout; - if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe) < 0) { - log_error("fail to add fd to epoll: %m\n"); - goto out; + r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe); + if (r < 0) { + log_error_errno(errno, "fail to add stdout fd to epoll: %m"); + return; } } if (fd_stderr >= 0) { - memset(&ep_errpipe, 0, sizeof(struct epoll_event)); - ep_errpipe.events = EPOLLIN; - ep_errpipe.data.ptr = &fd_stderr; - if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe) < 0) { - log_error("fail to add fd to epoll: %m\n"); - goto out; + r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe); + if (r < 0) { + log_error_errno(errno, "fail to add stderr fd to epoll: %m"); + return; } } @@ -465,15 +463,15 @@ static void spawn_read(struct udev_event *event, struct epoll_event ev[4]; int i; - if (event->timeout_usec > 0) { + if (timeout_usec > 0) { usec_t age_usec; age_usec = now(CLOCK_MONOTONIC) - event->birth_usec; - if (age_usec >= event->timeout_usec) { - log_error("timeout '%s'\n", cmd); - goto out; + if (age_usec >= timeout_usec) { + log_error("timeout '%s'", cmd); + return; } - timeout = ((event->timeout_usec - age_usec) / 1000) + 1000; + timeout = ((timeout_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC; } else { timeout = -1; } @@ -482,17 +480,19 @@ static void spawn_read(struct udev_event *event, if (fdcount < 0) { if (errno == EINTR) continue; - log_error("failed to poll: %m\n"); - goto out; - } - if (fdcount == 0) { - log_error("timeout '%s'\n", cmd); - goto out; + log_error_errno(errno, "failed to poll: %m"); + return; + } else if (fdcount == 0) { + log_error("timeout '%s'", cmd); + return; } for (i = 0; i < fdcount; i++) { int *fd = (int *)ev[i].data.ptr; + if (*fd < 0) + continue; + if (ev[i].events & EPOLLIN) { ssize_t count; char buf[4096]; @@ -508,7 +508,7 @@ static void spawn_read(struct udev_event *event, memcpy(&result[respos], buf, count); respos += count; } else { - log_error("'%s' ressize %zd too short\n", cmd, ressize); + log_error("'%s' ressize %zu too short", cmd, ressize); } } @@ -520,13 +520,14 @@ static void spawn_read(struct udev_event *event, pos = buf; while ((line = strsep(&pos, "\n"))) { if (pos != NULL || line[0] != '\0') - log_debug("'%s'(%s) '%s'\n", cmd, *fd == fd_stdout ? "out" : "err" , line); + log_debug("'%s'(%s) '%s'", cmd, *fd == fd_stdout ? "out" : "err" , line); } } } else if (ev[i].events & EPOLLHUP) { - if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) { - log_error("failed to remove fd from epoll: %m\n"); - goto out; + r = epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL); + if (r < 0) { + log_error_errno(errno, "failed to remove fd from epoll: %m"); + return; } *fd = -1; } @@ -536,13 +537,12 @@ static void spawn_read(struct udev_event *event, /* return the child's stdout string */ if (result != NULL) result[respos] = '\0'; -out: - if (fd_ep >= 0) - close(fd_ep); } -static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid) -{ +static int spawn_wait(struct udev_event *event, + usec_t timeout_usec, + usec_t timeout_warn_usec, + const char *cmd, pid_t pid) { struct pollfd pfd[1]; int err = 0; @@ -551,31 +551,48 @@ static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid) while (pid > 0) { int timeout; + int timeout_warn = 0; int fdcount; - if (event->timeout_usec > 0) { + if (timeout_usec > 0) { usec_t age_usec; age_usec = now(CLOCK_MONOTONIC) - event->birth_usec; - if (age_usec >= event->timeout_usec) + if (age_usec >= timeout_usec) timeout = 1000; - else - timeout = ((event->timeout_usec - age_usec) / 1000) + 1000; + else { + if (timeout_warn_usec > 0) + timeout_warn = ((timeout_warn_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC; + + timeout = ((timeout_usec - timeout_warn_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC; + } } else { timeout = -1; } - fdcount = poll(pfd, 1, timeout); + fdcount = poll(pfd, 1, timeout_warn); if (fdcount < 0) { if (errno == EINTR) continue; err = -errno; - log_error("failed to poll: %m\n"); + log_error_errno(errno, "failed to poll: %m"); goto out; } if (fdcount == 0) { - log_error("timeout: killing '%s' [%u]\n", cmd, pid); - kill(pid, SIGKILL); + log_warning("slow: '%s' ["PID_FMT"]", cmd, pid); + + fdcount = poll(pfd, 1, timeout); + if (fdcount < 0) { + if (errno == EINTR) + continue; + err = -errno; + log_error_errno(errno, "failed to poll: %m"); + goto out; + } + if (fdcount == 0) { + log_error("timeout: killing '%s' ["PID_FMT"]", cmd, pid); + kill(pid, SIGKILL); + } } if (pfd[0].revents & POLLIN) { @@ -595,20 +612,20 @@ static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid) if (waitpid(pid, &status, WNOHANG) < 0) break; if (WIFEXITED(status)) { - log_debug("'%s' [%u] exit with return code %i\n", cmd, pid, WEXITSTATUS(status)); + log_debug("'%s' ["PID_FMT"] exit with return code %i", cmd, pid, WEXITSTATUS(status)); if (WEXITSTATUS(status) != 0) err = -1; } else if (WIFSIGNALED(status)) { - log_error("'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status))); + log_error("'%s' ["PID_FMT"] terminated by signal %i (%s)", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status))); err = -1; } else if (WIFSTOPPED(status)) { - log_error("'%s' [%u] stopped\n", cmd, pid); + log_error("'%s' ["PID_FMT"] stopped", cmd, pid); err = -1; } else if (WIFCONTINUED(status)) { - log_error("'%s' [%u] continued\n", cmd, pid); + log_error("'%s' ["PID_FMT"] continued", cmd, pid); err = -1; } else { - log_error("'%s' [%u] exit with status 0x%04x\n", cmd, pid, status); + log_error("'%s' ["PID_FMT"] exit with status 0x%04x", cmd, pid, status); err = -1; } pid = 0; @@ -620,8 +637,7 @@ out: return err; } -int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]) -{ +int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[]) { int i = 0; char *pos; @@ -655,10 +671,10 @@ out: } int udev_event_spawn(struct udev_event *event, + usec_t timeout_usec, + usec_t timeout_warn_usec, const char *cmd, char **envp, const sigset_t *sigmask, - char *result, size_t ressize) -{ - struct udev *udev = event->udev; + char *result, size_t ressize) { int outpipe[2] = {-1, -1}; int errpipe[2] = {-1, -1}; pid_t pid; @@ -671,17 +687,17 @@ int udev_event_spawn(struct udev_event *event, udev_build_argv(event->udev, arg, NULL, argv); /* pipes from child to parent */ - if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) { + if (result != NULL || log_get_max_level() >= LOG_INFO) { if (pipe2(outpipe, O_NONBLOCK) != 0) { err = -errno; - log_error("pipe failed: %m\n"); + log_error_errno(errno, "pipe failed: %m"); goto out; } } - if (udev_get_log_priority(udev) >= LOG_INFO) { + if (log_get_max_level() >= LOG_INFO) { if (pipe2(errpipe, O_NONBLOCK) != 0) { err = -errno; - log_error("pipe failed: %m\n"); + log_error_errno(errno, "pipe failed: %m"); goto out; } } @@ -705,14 +721,14 @@ int udev_event_spawn(struct udev_event *event, errpipe[READ_END] = -1; } - log_debug("starting '%s'\n", cmd); + log_debug("starting '%s'", cmd); spawn_exec(event, cmd, argv, envp, sigmask, outpipe[WRITE_END], errpipe[WRITE_END]); _exit(2 ); case -1: - log_error("fork of '%s' failed: %m\n", cmd); + log_error_errno(errno, "fork of '%s' failed: %m", cmd); err = -1; goto out; default: @@ -726,11 +742,13 @@ int udev_event_spawn(struct udev_event *event, errpipe[WRITE_END] = -1; } - spawn_read(event, cmd, - outpipe[READ_END], errpipe[READ_END], - result, ressize); + spawn_read(event, + timeout_usec, + cmd, + outpipe[READ_END], errpipe[READ_END], + result, ressize); - err = spawn_wait(event, cmd, pid); + err = spawn_wait(event, timeout_usec, timeout_warn_usec, cmd, pid); } out: @@ -745,63 +763,54 @@ out: return err; } -static int rename_netif(struct udev_event *event) -{ +static int rename_netif(struct udev_event *event) { struct udev_device *dev = event->dev; - int sk; - struct ifreq ifr; - int err; - - log_debug("changing net interface name from '%s' to '%s'\n", - udev_device_get_sysname(dev), event->name); - - sk = socket(PF_INET, SOCK_DGRAM, 0); - if (sk < 0) { - err = -errno; - log_error("error opening socket: %m\n"); - return err; - } + char name[IFNAMSIZ]; + const char *oldname; + int r; - memset(&ifr, 0x00, sizeof(struct ifreq)); - strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev)); - strscpy(ifr.ifr_newname, IFNAMSIZ, event->name); - err = ioctl(sk, SIOCSIFNAME, &ifr); - if (err >= 0) { - print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname); - } else { - err = -errno; - log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname); - } - close(sk); - return err; + oldname = udev_device_get_sysname(dev); + + strscpy(name, IFNAMSIZ, event->name); + + r = rtnl_set_link_name(&event->rtnl, udev_device_get_ifindex(dev), name); + if (r < 0) + return log_error_errno(r, "Error changing net interface name '%s' to '%s': %m", oldname, name); + + log_debug("renamed network interface '%s' to '%s'", oldname, name); + + return 0; } -int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, const sigset_t *sigmask) -{ +void udev_event_execute_rules(struct udev_event *event, + usec_t timeout_usec, usec_t timeout_warn_usec, + struct udev_list *properties_list, + struct udev_rules *rules, + const sigset_t *sigmask) { struct udev_device *dev = event->dev; - int err = 0; if (udev_device_get_subsystem(dev) == NULL) - return -1; + return; if (streq(udev_device_get_action(dev), "remove")) { - udev_device_read_db(dev, NULL); + udev_device_read_db(dev); udev_device_delete_db(dev); udev_device_tag_index(dev, NULL, false); if (major(udev_device_get_devnum(dev)) != 0) udev_watch_end(event->udev, dev); - udev_rules_apply_to_event(rules, event, sigmask); + udev_rules_apply_to_event(rules, event, + timeout_usec, timeout_warn_usec, + properties_list, + sigmask); if (major(udev_device_get_devnum(dev)) != 0) udev_node_remove(dev); } else { - event->dev_db = udev_device_new(event->udev); + event->dev_db = udev_device_shallow_clone(dev); if (event->dev_db != NULL) { - udev_device_set_syspath(event->dev_db, udev_device_get_syspath(dev)); - udev_device_set_subsystem(event->dev_db, udev_device_get_subsystem(dev)); - udev_device_read_db(event->dev_db, NULL); + udev_device_read_db(event->dev_db); udev_device_set_info_loaded(event->dev_db); /* disable watch during event processing */ @@ -809,35 +818,47 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, udev_watch_end(event->udev, event->dev_db); } - udev_rules_apply_to_event(rules, event, sigmask); + if (major(udev_device_get_devnum(dev)) == 0 && + streq(udev_device_get_action(dev), "move")) { + struct udev_list_entry *entry; - /* rename a new network interface, if needed */ - if (udev_device_get_ifindex(dev) > 0 && streq(udev_device_get_action(dev), "add") && - event->name != NULL && !streq(event->name, udev_device_get_sysname(dev))) { - char syspath[UTIL_PATH_SIZE]; - char *pos; + for ((entry = udev_device_get_properties_list_entry(event->dev_db)); entry; entry = udev_list_entry_get_next(entry)) { + const char *key, *value; - err = rename_netif(event); - if (err == 0) { - log_debug("renamed netif to '%s'\n", event->name); + key = udev_list_entry_get_name(entry); + value = udev_list_entry_get_value(entry); - /* remember old name */ - udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev)); + udev_device_add_property(dev, key, value); + } + } - /* now change the devpath, because the kernel device name has changed */ - strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev)); - pos = strrchr(syspath, '/'); - if (pos != NULL) { - pos++; - strscpy(pos, sizeof(syspath) - (pos - syspath), event->name); - udev_device_set_syspath(event->dev, syspath); - udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev)); - log_debug("changed devpath to '%s'\n", udev_device_get_devpath(dev)); - } + udev_rules_apply_to_event(rules, event, + timeout_usec, timeout_warn_usec, + properties_list, + sigmask); + + /* rename a new network interface, if needed */ + if (udev_device_get_ifindex(dev) > 0 && streq(udev_device_get_action(dev), "add") && + event->name != NULL && !streq(event->name, udev_device_get_sysname(dev))) { + int r; + + r = rename_netif(event); + if (r < 0) + log_warning_errno(r, "could not rename interface '%d' from '%s' to '%s': %m", udev_device_get_ifindex(dev), + udev_device_get_sysname(dev), event->name); + else { + r = udev_device_rename(dev, event->name); + if (r < 0) + log_warning_errno(r, "renamed interface '%d' from '%s' to '%s', but could not update udev_device: %m", + udev_device_get_ifindex(dev), udev_device_get_sysname(dev), event->name); + else + log_debug("changed devpath to '%s'", udev_device_get_devpath(dev)); } } if (major(udev_device_get_devnum(dev)) > 0) { + bool apply; + /* remove/update possible left-over symlinks from old database entry */ if (event->dev_db != NULL) udev_node_update_old_links(dev, event->dev_db); @@ -861,8 +882,8 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, } } - udev_node_add(dev, event->owner_set || event->group_set || event->mode_set, - event->mode, event->uid, event->gid); + apply = streq(udev_device_get_action(dev), "add") || event->owner_set || event->group_set || event->mode_set; + udev_node_add(dev, apply, event->mode, event->uid, event->gid, &event->seclabel_list); } /* preserve old, or get new initialization timestamp */ @@ -879,11 +900,9 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, udev_device_unref(event->dev_db); event->dev_db = NULL; } - return err; } -void udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask) -{ +void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, usec_t timeout_warn_usec, const sigset_t *sigmask) { struct udev_list_entry *list_entry; udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) { @@ -900,13 +919,13 @@ void udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask) char **envp; if (event->exec_delay > 0) { - log_debug("delay execution of '%s'\n", program); + log_debug("delay execution of '%s'", program); sleep(event->exec_delay); } udev_event_apply_format(event, cmd, program, sizeof(program)); envp = udev_device_get_properties_envp(event->dev); - udev_event_spawn(event, program, envp, sigmask, NULL, 0); + udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, NULL, 0); } } }