X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fudev%2Fudev-event.c;h=30a670890174c3d292661f1226821a02703572c5;hb=cc821d02a37c8c76aaf15bae2d33fee1bdc4b2e0;hp=18b92ca428769b08e79b7891ba37ef0ae4f72445;hpb=b081b27e1433cdc7ac72b25ae8b4db887d79187f;p=elogind.git diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c index 18b92ca42..30a670890 100644 --- a/src/udev/udev-event.c +++ b/src/udev/udev-event.c @@ -53,6 +53,7 @@ struct udev_event *udev_event_new(struct udev_device *dev) { 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); @@ -375,8 +376,7 @@ 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; + _cleanup_close_ int fd = -1; /* discard child output or connect to pipe */ fd = open("/dev/null", O_RDWR); @@ -386,19 +386,17 @@ static int spawn_exec(struct udev_event *event, dup2(fd, STDOUT_FILENO); if (fd_stderr < 0) dup2(fd, STDERR_FILENO); - close(fd); - } else { + } else log_error("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 */ @@ -411,9 +409,9 @@ 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", argv[0], cmd); - return err; + + return -errno; } static void spawn_read(struct udev_event *event, @@ -421,9 +419,17 @@ static void spawn_read(struct udev_event *event, 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) @@ -432,26 +438,22 @@ 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"); - goto out; + return; } if (fd_stdout >= 0) { - memzero(&ep_outpipe, 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"); - goto out; + r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe); + if (r < 0) { + log_error("fail to add stdout fd to epoll: %m"); + return; } } if (fd_stderr >= 0) { - memzero(&ep_errpipe, 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"); - goto out; + r = epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe); + if (r < 0) { + log_error("fail to add stderr fd to epoll: %m"); + return; } } @@ -468,7 +470,7 @@ static void spawn_read(struct udev_event *event, age_usec = now(CLOCK_MONOTONIC) - event->birth_usec; if (age_usec >= timeout_usec) { log_error("timeout '%s'", cmd); - goto out; + return; } timeout = ((timeout_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC; } else { @@ -480,16 +482,18 @@ static void spawn_read(struct udev_event *event, if (errno == EINTR) continue; log_error("failed to poll: %m"); - goto out; - } - if (fdcount == 0) { + return; + } else if (fdcount == 0) { log_error("timeout '%s'", cmd); - goto out; + 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]; @@ -521,9 +525,10 @@ static void spawn_read(struct udev_event *event, } } } else if (ev[i].events & EPOLLHUP) { - if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) { + r = epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL); + if (r < 0) { log_error("failed to remove fd from epoll: %m"); - goto out; + return; } *fd = -1; } @@ -533,13 +538,11 @@ 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, usec_t timeout_usec, + usec_t timeout_warn_usec, const char *cmd, pid_t pid) { struct pollfd pfd[1]; int err = 0; @@ -549,6 +552,7 @@ static int spawn_wait(struct udev_event *event, while (pid > 0) { int timeout; + int timeout_warn = 0; int fdcount; if (timeout_usec > 0) { @@ -557,13 +561,17 @@ static int spawn_wait(struct udev_event *event, age_usec = now(CLOCK_MONOTONIC) - event->birth_usec; if (age_usec >= timeout_usec) timeout = 1000; - else - timeout = ((timeout_usec - age_usec) / USEC_PER_MSEC) + MSEC_PER_SEC; + 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; @@ -572,8 +580,20 @@ static int spawn_wait(struct udev_event *event, goto out; } if (fdcount == 0) { - log_error("timeout: killing '%s' [%u]", cmd, pid); - kill(pid, SIGKILL); + log_warning("slow: '%s' [%u]", cmd, pid); + + fdcount = poll(pfd, 1, timeout); + if (fdcount < 0) { + if (errno == EINTR) + continue; + err = -errno; + log_error("failed to poll: %m"); + goto out; + } + if (fdcount == 0) { + log_error("timeout: killing '%s' [%u]", cmd, pid); + kill(pid, SIGKILL); + } } if (pfd[0].revents & POLLIN) { @@ -653,6 +673,7 @@ 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; @@ -729,7 +750,7 @@ int udev_event_spawn(struct udev_event *event, outpipe[READ_END], errpipe[READ_END], result, ressize); - err = spawn_wait(event, timeout_usec, cmd, pid); + err = spawn_wait(event, timeout_usec, timeout_warn_usec, cmd, pid); } out: @@ -746,34 +767,29 @@ out: static int rename_netif(struct udev_event *event) { struct udev_device *dev = event->dev; - _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL; char name[IFNAMSIZ]; const char *oldname; int r; oldname = udev_device_get_sysname(dev); - log_debug("changing net interface name from '%s' to '%s'", - oldname, event->name); - strscpy(name, IFNAMSIZ, event->name); - r = sd_rtnl_open(&rtnl, 0); - if (r < 0) + r = rtnl_set_link_name(&event->rtnl, udev_device_get_ifindex(dev), name); + if (r < 0) { + log_error("error changing net interface name '%s' to '%s': %s", + oldname, name, strerror(-r)); return r; + } - r = rtnl_set_link_name(rtnl, udev_device_get_ifindex(dev), name); - if (r < 0) - log_error("error changing net interface name %s to %s: %s", - oldname, name, strerror(-r)); - else - print_kmsg("renamed network interface %s to %s\n", oldname, name); + log_debug("renamed network interface '%s' to '%s'\n", oldname, name); - return r; + return 0; } void udev_event_execute_rules(struct udev_event *event, usec_t timeout_usec, + usec_t timeout_warn_usec, struct udev_rules *rules, const sigset_t *sigmask) { struct udev_device *dev = event->dev; @@ -788,7 +804,7 @@ void udev_event_execute_rules(struct udev_event *event, if (major(udev_device_get_devnum(dev)) != 0) udev_watch_end(event->udev, dev); - udev_rules_apply_to_event(rules, event, timeout_usec, sigmask); + udev_rules_apply_to_event(rules, event, timeout_usec, timeout_warn_usec, sigmask); if (major(udev_device_get_devnum(dev)) != 0) udev_node_remove(dev); @@ -797,6 +813,7 @@ void udev_event_execute_rules(struct udev_event *event, 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_set_devnum(event->dev_db, udev_device_get_devnum(dev)); udev_device_read_db(event->dev_db, NULL); udev_device_set_info_loaded(event->dev_db); @@ -821,7 +838,7 @@ void udev_event_execute_rules(struct udev_event *event, } } - udev_rules_apply_to_event(rules, event, timeout_usec, sigmask); + udev_rules_apply_to_event(rules, event, timeout_usec, timeout_warn_usec, sigmask); /* rename a new network interface, if needed */ if (udev_device_get_ifindex(dev) > 0 && streq(udev_device_get_action(dev), "add") && @@ -832,8 +849,6 @@ void udev_event_execute_rules(struct udev_event *event, r = rename_netif(event); if (r >= 0) { - log_debug("renamed netif to '%s'", event->name); - /* remember old name */ udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev)); @@ -896,7 +911,7 @@ void udev_event_execute_rules(struct udev_event *event, } } -void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, 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)) { @@ -919,7 +934,7 @@ void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, const udev_event_apply_format(event, cmd, program, sizeof(program)); envp = udev_device_get_properties_envp(event->dev); - udev_event_spawn(event, timeout_usec, program, envp, sigmask, NULL, 0); + udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, NULL, 0); } } }