X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=device.c;h=70936808bec483712be3aa02b505cd12035e006d;hp=b00a0f987f6fb227b7192241e9a2d57f30866dc9;hb=67ef7823c651015929d4f20e4c9d59998c5bac7d;hpb=10a94420172b33a7472a16b2e829689dbc570cad diff --git a/device.c b/device.c index b00a0f987..70936808b 100644 --- a/device.c +++ b/device.c @@ -27,17 +27,14 @@ #include "device.h" #include "strv.h" #include "log.h" +#include "unit-name.h" +#include "dbus-device.h" static const UnitActiveState state_translation_table[_DEVICE_STATE_MAX] = { [DEVICE_DEAD] = UNIT_INACTIVE, [DEVICE_AVAILABLE] = UNIT_ACTIVE }; -static const char* const state_string_table[_DEVICE_STATE_MAX] = { - [DEVICE_DEAD] = "dead", - [DEVICE_AVAILABLE] = "available" -}; - static void device_done(Unit *u) { Device *d = DEVICE(u); @@ -47,15 +44,6 @@ static void device_done(Unit *u) { d->sysfs = NULL; } -static void device_init(Unit *u) { - Device *d = DEVICE(u); - - assert(d); - assert(u->meta.load_state == UNIT_STUB); - - d->state = 0; -} - static void device_set_state(Device *d, DeviceState state) { DeviceState old_state; assert(d); @@ -64,7 +52,10 @@ static void device_set_state(Device *d, DeviceState state) { d->state = state; if (state != old_state) - log_debug("%s changed %s → %s", unit_id(UNIT(d)), state_string_table[old_state], state_string_table[state]); + log_debug("%s changed %s -> %s", + UNIT(d)->meta.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]); } @@ -89,7 +80,7 @@ static void device_dump(Unit *u, FILE *f, const char *prefix) { fprintf(f, "%sDevice State: %s\n" "%sSysfs Path: %s\n", - prefix, state_string_table[d->state], + prefix, device_state_to_string(d->state), prefix, strna(d->sysfs)); } @@ -102,7 +93,7 @@ static UnitActiveState device_active_state(Unit *u) { static const char *device_sub_state_to_string(Unit *u) { assert(u); - return state_string_table[DEVICE(u)->state]; + return device_state_to_string(DEVICE(u)->state); } static int device_add_escaped_name(Unit *u, const char *dn, bool make_id) { @@ -113,7 +104,7 @@ static int device_add_escaped_name(Unit *u, const char *dn, bool make_id) { assert(dn); assert(dn[0] == '/'); - if (!(e = unit_name_escape_path(dn+1, ".device"))) + if (!(e = unit_name_from_path(dn, ".device"))) return -ENOMEM; r = unit_add_name(u, e); @@ -138,7 +129,7 @@ static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) { assert(dn[0] == '/'); assert(_u); - if (!(e = unit_name_escape_path(dn+1, ".device"))) + if (!(e = unit_name_from_path(dn, ".device"))) return -ENOMEM; u = manager_get_unit(m, e); @@ -152,64 +143,44 @@ static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) { return 0; } -static bool devnode_is_api(const char *node) { - unsigned i; - - static const char * const table[] = { - "/dev/null", - "/dev/zero", - "/dev/urandom", - "/dev/random", - "/dev/port", - "/dev/oldmem", - "/dev/full", - "/dev/kmsg", - "/dev/mem" - }; - - for (i = 0; i < ELEMENTSOF(table); i++) - if (streq(table[i], node)) - return true; - - return false; -} - static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) { - const char *dn, *names, *wants, *sysfs, *expose, *model; + const char *dn, *wants, *sysfs, *expose, *model, *alias; Unit *u = NULL; int r; char *w, *state; size_t l; bool delete; struct udev_list_entry *item = NULL, *first = NULL; + int b; assert(m); if (!(sysfs = udev_device_get_syspath(dev))) return -ENOMEM; + if (!(expose = udev_device_get_property_value(dev, "SYSTEMD_EXPOSE"))) + return 0; + + if ((b = parse_boolean(expose)) < 0) { + log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose); + return 0; + } + + if (!b) + return 0; + /* Check whether this entry is even relevant for us. */ dn = udev_device_get_devnode(dev); - expose = udev_device_get_property_value(dev, "SYSTEMD_EXPOSE"); - names = udev_device_get_property_value(dev, "SYSTEMD_NAMES"); wants = udev_device_get_property_value(dev, "SYSTEMD_WANTS"); + alias = udev_device_get_property_value(dev, "SYSTEMD_ALIAS"); - if (expose) { - int b; - - if ((b = parse_boolean(expose)) < 0) { - log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose); - return 0; - } - - if (!b) - return 0; - } else - if ((!dn || devnode_is_api(dn)) && !names && !wants) - return 0; + /* We allow exactly one alias to be configured a this time and + * it must be a path */ - /* Ok, seems kinda interesting. Now, let's see if this one - * already exists. */ + if (alias && !is_path(alias)) { + log_warning("SYSTEMD_ALIAS for %s is not a path, ignoring: %s", sysfs, alias); + alias = NULL; + } if ((r = device_find_escape_name(m, sysfs, &u)) < 0) return r; @@ -229,12 +200,16 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u } } + if (r == 0 && alias) + if ((r = device_find_escape_name(m, alias, &u)) < 0) + return r; + /* FIXME: this needs proper merging */ assert((r > 0) == !!u); /* If this is a different unit, then let's not merge things */ - if (u && DEVICE(u)->sysfs && !streq(DEVICE(u)->sysfs, sysfs)) + if (u && DEVICE(u)->sysfs && !path_equal(DEVICE(u)->sysfs, sysfs)) u = NULL; if (!u) { @@ -256,6 +231,10 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u goto fail; } + if (alias) + if ((r = device_add_escaped_name(u, alias, true)) < 0) + goto fail; + if (dn) if ((r = device_add_escaped_name(u, dn, true)) < 0) goto fail; @@ -273,27 +252,6 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u if ((r = unit_set_description(u, dn)) < 0) goto fail; - /* We don't remove names that are gone. But that should be - * fine and should probably be fixed only on a configuration - * refresh. */ - - if (names) { - FOREACH_WORD(w, l, names, state) { - char *e; - - if (!(e = strndup(w, l))) { - r = -ENOMEM; - goto fail; - } - - r = unit_add_name(u, e); - free(e); - - if (r < 0 && r != -EEXIST) - goto fail; - } - } - if (wants) { FOREACH_WORD(w, l, wants, state) { char *e; @@ -303,7 +261,7 @@ static int device_process_new_device(Manager *m, struct udev_device *dev, bool u goto fail; } - r = unit_add_dependency_by_name(u, UNIT_WANTS, e); + r = unit_add_dependency_by_name(u, UNIT_WANTS, NULL, e, true); free(e); if (r < 0) @@ -356,7 +314,7 @@ static int device_process_removed_device(Manager *m, struct udev_device *dev) { return -ENOMEM; assert(sysfs[0] == '/'); - if (!(e = unit_name_escape_path(sysfs+1, ".device"))) + if (!(e = unit_name_from_path(sysfs, ".device"))) return -ENOMEM; u = manager_get_unit(m, e); @@ -376,11 +334,15 @@ static int device_process_removed_device(Manager *m, struct udev_device *dev) { static void device_shutdown(Manager *m) { assert(m); - if (m->udev_monitor) + if (m->udev_monitor) { udev_monitor_unref(m->udev_monitor); + m->udev_monitor = NULL; + } - if (m->udev) + if (m->udev) { udev_unref(m->udev); + m->udev = NULL; + } } static int device_enumerate(Manager *m) { @@ -391,28 +353,30 @@ static int device_enumerate(Manager *m) { assert(m); - if (!(m->udev = udev_new())) - return -ENOMEM; + if (!m->udev) { + if (!(m->udev = udev_new())) + return -ENOMEM; - if (!(m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"))) { - r = -ENOMEM; - goto fail; - } + if (!(m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"))) { + r = -ENOMEM; + goto fail; + } - if (udev_monitor_enable_receiving(m->udev_monitor) < 0) { - r = -EIO; - goto fail; - } + if (udev_monitor_enable_receiving(m->udev_monitor) < 0) { + r = -EIO; + goto fail; + } - m->udev_watch.type = WATCH_UDEV; - m->udev_watch.fd = udev_monitor_get_fd(m->udev_monitor); + 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; + 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; + if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->udev_watch.fd, &ev) < 0) + return -errno; + } if (!(e = udev_enumerate_new(m->udev))) { r = -ENOMEM; @@ -473,10 +437,21 @@ fail: udev_device_unref(dev); } +static const char* const device_state_table[_DEVICE_STATE_MAX] = { + [DEVICE_DEAD] = "dead", + [DEVICE_AVAILABLE] = "available" +}; + +DEFINE_STRING_TABLE_LOOKUP(device_state, DeviceState); + const UnitVTable device_vtable = { .suffix = ".device", - .init = device_init, + .no_requires = true, + .no_instances = true, + .no_snapshots = true, + .no_isolate = true, + .load = unit_load_fragment_and_dropin_optional, .done = device_done, .coldplug = device_coldplug, @@ -486,6 +461,8 @@ const UnitVTable device_vtable = { .active_state = device_active_state, .sub_state_to_string = device_sub_state_to_string, + .bus_message_handler = bus_device_message_handler, + .enumerate = device_enumerate, .shutdown = device_shutdown };