diff options
author | Lennart Poettering <lennart@poettering.net> | 2010-05-16 18:45:24 +0200 |
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committer | Lennart Poettering <lennart@poettering.net> | 2010-05-16 18:45:24 +0200 |
commit | e99e38bbdcca3fe5956823bdb3d38544ccf93221 (patch) | |
tree | 109871cf2bdcad19105d55f4eea62d5495a8f614 /device.c | |
parent | e9da3678fcfc774b325dc1eaa054d0e00028a1fc (diff) |
build-sys: move source files to subdirectory
Diffstat (limited to 'device.c')
-rw-r--r-- | device.c | 471 |
1 files changed, 0 insertions, 471 deletions
diff --git a/device.c b/device.c deleted file mode 100644 index e67d0a6c2d..0000000000 --- a/device.c +++ /dev/null @@ -1,471 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8 -*-*/ - -/*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> -#include <sys/epoll.h> -#include <libudev.h> - -#include "unit.h" -#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 void device_done(Unit *u) { - Device *d = DEVICE(u); - - assert(d); - - free(d->sysfs); - d->sysfs = NULL; -} - -static void device_set_state(Device *d, DeviceState state) { - DeviceState old_state; - assert(d); - - old_state = d->state; - d->state = state; - - if (state != old_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]); -} - -static int device_coldplug(Unit *u) { - Device *d = DEVICE(u); - - assert(d); - assert(d->state == DEVICE_DEAD); - - if (d->sysfs) - device_set_state(d, DEVICE_AVAILABLE); - - return 0; -} - -static void device_dump(Unit *u, FILE *f, const char *prefix) { - Device *d = DEVICE(u); - - assert(d); - - fprintf(f, - "%sDevice State: %s\n" - "%sSysfs Path: %s\n", - prefix, device_state_to_string(d->state), - prefix, strna(d->sysfs)); -} - -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) { - assert(u); - - return device_state_to_string(DEVICE(u)->state); -} - -static int device_add_escaped_name(Unit *u, const char *dn, bool make_id) { - char *e; - int r; - - assert(u); - assert(dn); - assert(dn[0] == '/'); - - if (!(e = unit_name_from_path(dn, ".device"))) - return -ENOMEM; - - r = unit_add_name(u, e); - - if (r >= 0 && make_id) - unit_choose_id(u, e); - - free(e); - - if (r < 0 && r != -EEXIST) - return r; - - return 0; -} - -static int device_find_escape_name(Manager *m, const char *dn, Unit **_u) { - char *e; - Unit *u; - - assert(m); - assert(dn); - assert(dn[0] == '/'); - assert(_u); - - if (!(e = unit_name_from_path(dn, ".device"))) - return -ENOMEM; - - u = manager_get_unit(m, e); - free(e); - - if (u) { - *_u = u; - return 1; - } - - return 0; -} - -static int device_process_new_device(Manager *m, struct udev_device *dev, bool update_state) { - 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); - wants = udev_device_get_property_value(dev, "SYSTEMD_WANTS"); - alias = udev_device_get_property_value(dev, "SYSTEMD_ALIAS"); - - /* We allow exactly one alias to be configured a this time and - * it must be a path */ - - 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; - - if (r == 0 && dn) - if ((r = device_find_escape_name(m, dn, &u)) < 0) - return r; - - if (r == 0) { - first = udev_device_get_devlinks_list_entry(dev); - udev_list_entry_foreach(item, first) { - if ((r = device_find_escape_name(m, udev_list_entry_get_name(item), &u)) < 0) - return r; - - if (r > 0) - break; - } - } - - 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 && !path_equal(DEVICE(u)->sysfs, sysfs)) - u = NULL; - - if (!u) { - delete = true; - - if (!(u = unit_new(m))) - return -ENOMEM; - - if ((r = device_add_escaped_name(u, sysfs, true)) < 0) - goto fail; - - unit_add_to_load_queue(u); - } else - delete = false; - - if (!(DEVICE(u)->sysfs)) - if (!(DEVICE(u)->sysfs = strdup(sysfs))) { - r = -ENOMEM; - 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; - - first = udev_device_get_devlinks_list_entry(dev); - udev_list_entry_foreach(item, first) - if ((r = device_add_escaped_name(u, udev_list_entry_get_name(item), false)) < 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 (dn) { - if ((r = unit_set_description(u, dn)) < 0) - goto fail; - } else - if ((r = unit_set_description(u, sysfs)) < 0) - goto fail; - - if (wants) { - FOREACH_WORD(w, l, wants, state) { - char *e; - - if (!(e = strndup(w, l))) { - r = -ENOMEM; - goto fail; - } - - r = unit_add_dependency_by_name(u, UNIT_WANTS, NULL, e, true); - free(e); - - if (r < 0) - goto fail; - } - } - - if (update_state) { - manager_dispatch_load_queue(u->meta.manager); - device_set_state(DEVICE(u), DEVICE_AVAILABLE); - } - - unit_add_to_dbus_queue(u); - - return 0; - -fail: - if (delete && u) - unit_free(u); - return r; -} - -static int device_process_path(Manager *m, const char *path, bool update_state) { - int r; - struct udev_device *dev; - - assert(m); - assert(path); - - if (!(dev = udev_device_new_from_syspath(m->udev, path))) { - log_warning("Failed to get udev device object from udev for path %s.", path); - return -ENOMEM; - } - - r = device_process_new_device(m, dev, update_state); - udev_device_unref(dev); - return r; -} - -static int device_process_removed_device(Manager *m, struct udev_device *dev) { - const char *sysfs; - char *e; - Unit *u; - Device *d; - - assert(m); - assert(dev); - - if (!(sysfs = udev_device_get_syspath(dev))) - return -ENOMEM; - - assert(sysfs[0] == '/'); - if (!(e = unit_name_from_path(sysfs, ".device"))) - return -ENOMEM; - - u = manager_get_unit(m, e); - free(e); - - if (!u) - return 0; - - d = DEVICE(u); - free(d->sysfs); - d->sysfs = NULL; - - device_set_state(d, DEVICE_DEAD); - return 0; -} - -static void device_shutdown(Manager *m) { - assert(m); - - if (m->udev_monitor) { - udev_monitor_unref(m->udev_monitor); - m->udev_monitor = NULL; - } - - if (m->udev) { - udev_unref(m->udev); - m->udev = NULL; - } -} - -static int device_enumerate(Manager *m) { - struct epoll_event ev; - int r; - struct udev_enumerate *e = NULL; - struct udev_list_entry *item = NULL, *first = NULL; - - assert(m); - - 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 (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); - - 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 (!(e = udev_enumerate_new(m->udev))) { - r = -ENOMEM; - goto fail; - } - - if (udev_enumerate_scan_devices(e) < 0) { - r = -EIO; - 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; - const char *action; - - assert(m); - assert(events == EPOLLIN); - - if (!(dev = udev_monitor_receive_device(m->udev_monitor))) { - log_error("Failed to receive device."); - return; - } - - if (!(action = udev_device_get_action(dev))) { - log_error("Failed to get udev action string."); - goto fail; - } - - if (streq(action, "remove")) { - if ((r = device_process_removed_device(m, dev)) < 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) { - log_error("Failed to process udev device event: %s", strerror(-r)); - goto fail; - } - } - -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", - - .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, - - .dump = device_dump, - - .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 -}; 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