X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fcore%2Fdevice.c;h=91e37e09dbeca196f5eec3d359b92985498336b7;hb=3772995afa7df42c3a332fb085a27cb5d266b893;hp=88ce0cdd18719174de07cbe502152cdb7ae87421;hpb=5430f7f2bc7330f3088b894166bf3524a067e3d8;p=elogind.git diff --git a/src/core/device.c b/src/core/device.c index 88ce0cdd1..91e37e09d 100644 --- a/src/core/device.c +++ b/src/core/device.c @@ -30,12 +30,16 @@ #include "unit-name.h" #include "dbus-device.h" #include "def.h" +#include "path-util.h" +#include "udev-util.h" static const UnitActiveState state_translation_table[_DEVICE_STATE_MAX] = { [DEVICE_DEAD] = UNIT_INACTIVE, [DEVICE_PLUGGED] = UNIT_ACTIVE }; +static int device_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); + static void device_unset_sysfs(Device *d) { Device *first; @@ -47,7 +51,7 @@ static void device_unset_sysfs(Device *d) { /* Remove this unit from the chain of devices which share the * same sysfs path. */ first = hashmap_get(UNIT(d)->manager->devices_by_sysfs, d->sysfs); - LIST_REMOVE(Device, same_sysfs, first, d); + LIST_REMOVE(same_sysfs, first, d); if (first) hashmap_remove_and_replace(UNIT(d)->manager->devices_by_sysfs, d->sysfs, first->sysfs, first); @@ -69,7 +73,7 @@ static void device_init(Unit *u) { * indefinitely for plugged in devices, something which cannot * happen for the other units since their operations time out * anyway. */ - UNIT(d)->job_timeout = DEFAULT_TIMEOUT_USEC; + UNIT(d)->job_timeout = u->manager->default_timeout_start_usec; UNIT(d)->ignore_on_isolate = true; UNIT(d)->ignore_on_snapshot = true; @@ -91,10 +95,10 @@ static void device_set_state(Device *d, DeviceState state) { d->state = state; if (state != old_state) - log_debug("%s changed %s -> %s", - UNIT(d)->id, - device_state_to_string(old_state), - device_state_to_string(state)); + log_debug_unit(UNIT(d)->id, + "%s changed %s -> %s", UNIT(d)->id, + device_state_to_string(old_state), + device_state_to_string(state)); unit_notify(UNIT(d), state_translation_table[old_state], state_translation_table[state], true); } @@ -123,32 +127,31 @@ static void device_dump(Unit *u, FILE *f, const char *prefix) { prefix, strna(d->sysfs)); } -static UnitActiveState device_active_state(Unit *u) { +_pure_ static UnitActiveState device_active_state(Unit *u) { assert(u); return state_translation_table[DEVICE(u)->state]; } -static const char *device_sub_state_to_string(Unit *u) { +_pure_ static const char *device_sub_state_to_string(Unit *u) { assert(u); return device_state_to_string(DEVICE(u)->state); } static int device_add_escaped_name(Unit *u, const char *dn) { - char *e; + _cleanup_free_ char *e = NULL; int r; assert(u); assert(dn); assert(dn[0] == '/'); - if (!(e = unit_name_from_path(dn, ".device"))) + e = unit_name_from_path(dn, ".device"); + if (!e) return -ENOMEM; r = unit_add_name(u, e); - free(e); - if (r < 0 && r != -EEXIST) return r; @@ -156,7 +159,7 @@ static int device_add_escaped_name(Unit *u, const char *dn) { } static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) { - char *e; + _cleanup_free_ char *e = NULL; Unit *u; assert(m); @@ -164,12 +167,11 @@ static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) { assert(dn[0] == '/'); assert(_u); - if (!(e = unit_name_from_path(dn, ".device"))) + e = unit_name_from_path(dn, ".device"); + if (!e) return -ENOMEM; u = manager_get_unit(m, e); - free(e); - if (u) { *_u = u; return 1; @@ -186,10 +188,12 @@ static int device_update_unit(Manager *m, struct udev_device *dev, const char *p assert(m); - if (!(sysfs = udev_device_get_syspath(dev))) + sysfs = udev_device_get_syspath(dev); + if (!sysfs) return -ENOMEM; - if ((r = device_find_escape_name(m, path, &u)) < 0) + r = device_find_escape_name(m, path, &u); + if (r < 0) return r; if (u && DEVICE(u)->sysfs && !path_equal(DEVICE(u)->sysfs, sysfs)) @@ -217,61 +221,79 @@ static int device_update_unit(Manager *m, struct udev_device *dev, const char *p if (!DEVICE(u)->sysfs) { Device *first; - if (!(DEVICE(u)->sysfs = strdup(sysfs))) { + DEVICE(u)->sysfs = strdup(sysfs); + if (!DEVICE(u)->sysfs) { r = -ENOMEM; goto fail; } - if (!m->devices_by_sysfs) - if (!(m->devices_by_sysfs = hashmap_new(string_hash_func, string_compare_func))) { - r = -ENOMEM; - goto fail; - } + r = hashmap_ensure_allocated(&m->devices_by_sysfs, string_hash_func, string_compare_func); + if (r < 0) + goto fail; first = hashmap_get(m->devices_by_sysfs, sysfs); - LIST_PREPEND(Device, same_sysfs, first, DEVICE(u)); + LIST_PREPEND(same_sysfs, first, DEVICE(u)); - if ((r = hashmap_replace(m->devices_by_sysfs, DEVICE(u)->sysfs, first)) < 0) + r = hashmap_replace(m->devices_by_sysfs, DEVICE(u)->sysfs, first); + if (r < 0) goto fail; } if ((model = udev_device_get_property_value(dev, "ID_MODEL_FROM_DATABASE")) || - (model = udev_device_get_property_value(dev, "ID_MODEL"))) { - if ((r = unit_set_description(u, model)) < 0) - goto fail; - } else - if ((r = unit_set_description(u, path)) < 0) - goto fail; + (model = udev_device_get_property_value(dev, "ID_MODEL"))) + r = unit_set_description(u, model); + else + r = unit_set_description(u, path); + if (r < 0) + goto fail; if (main) { /* The additional systemd udev properties we only * interpret for the main object */ const char *wants, *alias; - if ((alias = udev_device_get_property_value(dev, "SYSTEMD_ALIAS"))) { - if (!is_path(alias)) - log_warning("SYSTEMD_ALIAS for %s is not a path, ignoring: %s", sysfs, alias); - else { - if ((r = device_add_escaped_name(u, alias)) < 0) + alias = udev_device_get_property_value(dev, "SYSTEMD_ALIAS"); + if (alias) { + char *state, *w; + size_t l; + + FOREACH_WORD_QUOTED(w, l, alias, state) { + _cleanup_free_ char *e; + + e = strndup(w, l); + if (!e) { + r = -ENOMEM; goto fail; + } + + if (is_path(e)) + device_update_unit(m, dev, e, false); + else + log_warning("SYSTEMD_ALIAS for %s is not a path, ignoring: %s", sysfs, e); } } - if ((wants = udev_device_get_property_value(dev, "SYSTEMD_WANTS"))) { + wants = udev_device_get_property_value(dev, m->running_as == SYSTEMD_USER ? "SYSTEMD_USER_WANTS" : "SYSTEMD_WANTS"); + if (wants) { char *state, *w; size_t l; FOREACH_WORD_QUOTED(w, l, wants, state) { - char *e; + _cleanup_free_ char *e, *n = NULL; - if (!(e = strndup(w, l))) { + e = strndup(w, l); + if (!e) { r = -ENOMEM; goto fail; } - r = unit_add_dependency_by_name(u, UNIT_WANTS, e, NULL, true); - free(e); + n = unit_name_mangle(e); + if (!n) { + r = -ENOMEM; + goto fail; + } + r = unit_add_dependency_by_name(u, UNIT_WANTS, n, NULL, true); if (r < 0) goto fail; } @@ -293,14 +315,18 @@ fail: static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) { const char *sysfs, *dn; struct udev_list_entry *item = NULL, *first = NULL; + int r; assert(m); - if (!(sysfs = udev_device_get_syspath(dev))) + sysfs = udev_device_get_syspath(dev); + if (!sysfs) return -ENOMEM; /* Add the main unit named after the sysfs path */ - device_update_unit(m, dev, sysfs, true); + r = device_update_unit(m, dev, sysfs, true); + if (r < 0) + return r; /* Add an additional unit for the device node */ if ((dn = udev_device_get_devnode(dev))) @@ -354,7 +380,8 @@ static int device_process_path(Manager *m, const char *path, bool update_state) assert(m); assert(path); - if (!(dev = udev_device_new_from_syspath(m->udev, path))) { + dev = udev_device_new_from_syspath(m->udev, path); + if (!dev) { log_warning("Failed to get udev device object from udev for path %s.", path); return -ENOMEM; } @@ -443,6 +470,8 @@ fail: static void device_shutdown(Manager *m) { assert(m); + m->udev_event_source = sd_event_source_unref(m->udev_event_source); + if (m->udev_monitor) { udev_monitor_unref(m->udev_monitor); m->udev_monitor = NULL; @@ -458,18 +487,19 @@ static void device_shutdown(Manager *m) { } static int device_enumerate(Manager *m) { - struct epoll_event ev; - int r; - struct udev_enumerate *e = NULL; + _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; struct udev_list_entry *item = NULL, *first = NULL; + int r; assert(m); if (!m->udev) { - if (!(m->udev = udev_new())) + m->udev = udev_new(); + if (!m->udev) return -ENOMEM; - if (!(m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"))) { + m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); + if (!m->udev_monitor) { r = -ENOMEM; goto fail; } @@ -479,101 +509,88 @@ static int device_enumerate(Manager *m) { * during boot. */ udev_monitor_set_receive_buffer_size(m->udev_monitor, 128*1024*1024); - if (udev_monitor_filter_add_match_tag(m->udev_monitor, "systemd") < 0) { - r = -ENOMEM; + r = udev_monitor_filter_add_match_tag(m->udev_monitor, "systemd"); + if (r < 0) goto fail; - } - if (udev_monitor_enable_receiving(m->udev_monitor) < 0) { - r = -EIO; + r = udev_monitor_enable_receiving(m->udev_monitor); + if (r < 0) goto fail; - } - - m->udev_watch.type = WATCH_UDEV; - m->udev_watch.fd = udev_monitor_get_fd(m->udev_monitor); - - zero(ev); - ev.events = EPOLLIN; - ev.data.ptr = &m->udev_watch; - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_watch.fd, &ev) < 0) - return -errno; + r = sd_event_add_io(m->event, udev_monitor_get_fd(m->udev_monitor), EPOLLIN, device_dispatch_io, m, &m->udev_event_source); + if (r < 0) + goto fail; } - if (!(e = udev_enumerate_new(m->udev))) { + e = udev_enumerate_new(m->udev); + if (!e) { r = -ENOMEM; goto fail; } - if (udev_enumerate_add_match_tag(e, "systemd") < 0) { - r = -EIO; + + r = udev_enumerate_add_match_tag(e, "systemd"); + if (r < 0) goto fail; - } - if (udev_enumerate_scan_devices(e) < 0) { - r = -EIO; + r = udev_enumerate_scan_devices(e); + if (r < 0) goto fail; - } first = udev_enumerate_get_list_entry(e); udev_list_entry_foreach(item, first) device_process_path(m, udev_list_entry_get_name(item), false); - udev_enumerate_unref(e); return 0; fail: - if (e) - udev_enumerate_unref(e); - device_shutdown(m); return r; } -void device_fd_event(Manager *m, int events) { - struct udev_device *dev; - int r; +static int device_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { + _cleanup_udev_device_unref_ struct udev_device *dev = NULL; const char *action, *ready; + Manager *m = userdata; + int r; assert(m); - if (events != EPOLLIN) { + if (revents != EPOLLIN) { static RATELIMIT_DEFINE(limit, 10*USEC_PER_SEC, 5); if (!ratelimit_test(&limit)) log_error("Failed to get udev event: %m"); - if (!(events & EPOLLIN)) - return; + if (!(revents & EPOLLIN)) + return 0; } - if (!(dev = udev_monitor_receive_device(m->udev_monitor))) { - /* - * libudev might filter-out devices which pass the bloom filter, - * so getting NULL here is not necessarily an error - */ - return; - } + /* + * libudev might filter-out devices which pass the bloom + * filter, so getting NULL here is not necessarily an error. + */ + dev = udev_monitor_receive_device(m->udev_monitor); + if (!dev) + return 0; - if (!(action = udev_device_get_action(dev))) { + action = udev_device_get_action(dev); + if (!action) { log_error("Failed to get udev action string."); - goto fail; + return 0; } ready = udev_device_get_property_value(dev, "SYSTEMD_READY"); if (streq(action, "remove") || (ready && parse_boolean(ready) == 0)) { - if ((r = device_process_removed_device(m, dev)) < 0) { + r = device_process_removed_device(m, dev); + if (r < 0) log_error("Failed to process udev device event: %s", strerror(-r)); - goto fail; - } } else { - if ((r = device_process_new_device(m, dev, true)) < 0) { + r = device_process_new_device(m, dev, true); + if (r < 0) log_error("Failed to process udev device event: %s", strerror(-r)); - goto fail; - } } -fail: - udev_device_unref(dev); + return 0; } static const char* const device_state_table[_DEVICE_STATE_MAX] = { @@ -584,7 +601,6 @@ static const char* const device_state_table[_DEVICE_STATE_MAX] = { DEFINE_STRING_TABLE_LOOKUP(device_state, DeviceState); const UnitVTable device_vtable = { - .suffix = ".device", .object_size = sizeof(Device), .sections = "Unit\0" @@ -594,9 +610,9 @@ const UnitVTable device_vtable = { .no_instances = true, .init = device_init, - - .load = unit_load_fragment_and_dropin_optional, .done = device_done, + .load = unit_load_fragment_and_dropin_optional, + .coldplug = device_coldplug, .dump = device_dump, @@ -605,12 +621,22 @@ const UnitVTable device_vtable = { .sub_state_to_string = device_sub_state_to_string, .bus_interface = "org.freedesktop.systemd1.Device", - .bus_message_handler = bus_device_message_handler, - .bus_invalidating_properties = bus_device_invalidating_properties, + .bus_changing_properties = bus_device_changing_properties, + .bus_vtable = bus_device_vtable, .following = device_following, .following_set = device_following_set, .enumerate = device_enumerate, - .shutdown = device_shutdown + .shutdown = device_shutdown, + + .status_message_formats = { + .starting_stopping = { + [0] = "Expecting device %s...", + }, + .finished_start_job = { + [JOB_DONE] = "Found device %s.", + [JOB_TIMEOUT] = "Timed out waiting for device %s.", + }, + }, };