diff options
Diffstat (limited to 'src/core/slice.c')
-rw-r--r-- | src/core/slice.c | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/src/core/slice.c b/src/core/slice.c deleted file mode 100644 index ed5d3fd701..0000000000 --- a/src/core/slice.c +++ /dev/null @@ -1,360 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2013 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <errno.h> - -#include "alloc-util.h" -#include "dbus-slice.h" -#include "log.h" -#include "slice.h" -#include "special.h" -#include "string-util.h" -#include "strv.h" -#include "unit-name.h" -#include "unit.h" - -static const UnitActiveState state_translation_table[_SLICE_STATE_MAX] = { - [SLICE_DEAD] = UNIT_INACTIVE, - [SLICE_ACTIVE] = UNIT_ACTIVE -}; - -static void slice_init(Unit *u) { - assert(u); - assert(u->load_state == UNIT_STUB); - - u->ignore_on_isolate = true; -} - -static void slice_set_state(Slice *t, SliceState state) { - SliceState old_state; - assert(t); - - old_state = t->state; - t->state = state; - - if (state != old_state) - log_debug("%s changed %s -> %s", - UNIT(t)->id, - slice_state_to_string(old_state), - slice_state_to_string(state)); - - unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true); -} - -static int slice_add_parent_slice(Slice *s) { - char *a, *dash; - Unit *parent; - int r; - - assert(s); - - if (UNIT_ISSET(UNIT(s)->slice)) - return 0; - - if (unit_has_name(UNIT(s), SPECIAL_ROOT_SLICE)) - return 0; - - a = strdupa(UNIT(s)->id); - dash = strrchr(a, '-'); - if (dash) - strcpy(dash, ".slice"); - else - a = (char*) SPECIAL_ROOT_SLICE; - - r = manager_load_unit(UNIT(s)->manager, a, NULL, NULL, &parent); - if (r < 0) - return r; - - unit_ref_set(&UNIT(s)->slice, parent); - return 0; -} - -static int slice_add_default_dependencies(Slice *s) { - int r; - - assert(s); - - if (!UNIT(s)->default_dependencies) - return 0; - - /* Make sure slices are unloaded on shutdown */ - r = unit_add_two_dependencies_by_name( - UNIT(s), - UNIT_BEFORE, UNIT_CONFLICTS, - SPECIAL_SHUTDOWN_TARGET, NULL, true); - if (r < 0) - return r; - - return 0; -} - -static int slice_verify(Slice *s) { - _cleanup_free_ char *parent = NULL; - int r; - - assert(s); - - if (UNIT(s)->load_state != UNIT_LOADED) - return 0; - - if (!slice_name_is_valid(UNIT(s)->id)) { - log_unit_error(UNIT(s), "Slice name %s is not valid. Refusing.", UNIT(s)->id); - return -EINVAL; - } - - r = slice_build_parent_slice(UNIT(s)->id, &parent); - if (r < 0) - return log_unit_error_errno(UNIT(s), r, "Failed to determine parent slice: %m"); - - if (parent ? !unit_has_name(UNIT_DEREF(UNIT(s)->slice), parent) : UNIT_ISSET(UNIT(s)->slice)) { - log_unit_error(UNIT(s), "Located outside of parent slice. Refusing."); - return -EINVAL; - } - - return 0; -} - -static int slice_load_root_slice(Unit *u) { - assert(u); - - if (!unit_has_name(u, SPECIAL_ROOT_SLICE)) - return 0; - - u->perpetual = true; - - /* The root slice is a bit special. For example it is always running and cannot be terminated. Because of its - * special semantics we synthesize it here, instead of relying on the unit file on disk. */ - - u->default_dependencies = false; - u->ignore_on_isolate = true; - - if (!u->description) - u->description = strdup("Root Slice"); - if (!u->documentation) - u->documentation = strv_new("man:systemd.special(7)", NULL); - - return 1; -} - -static int slice_load(Unit *u) { - Slice *s = SLICE(u); - int r; - - assert(s); - assert(u->load_state == UNIT_STUB); - - r = slice_load_root_slice(u); - if (r < 0) - return r; - r = unit_load_fragment_and_dropin_optional(u); - if (r < 0) - return r; - - /* This is a new unit? Then let's add in some extras */ - if (u->load_state == UNIT_LOADED) { - - r = unit_patch_contexts(u); - if (r < 0) - return r; - - r = slice_add_parent_slice(s); - if (r < 0) - return r; - - r = slice_add_default_dependencies(s); - if (r < 0) - return r; - } - - return slice_verify(s); -} - -static int slice_coldplug(Unit *u) { - Slice *t = SLICE(u); - - assert(t); - assert(t->state == SLICE_DEAD); - - if (t->deserialized_state != t->state) - slice_set_state(t, t->deserialized_state); - - return 0; -} - -static void slice_dump(Unit *u, FILE *f, const char *prefix) { - Slice *t = SLICE(u); - - assert(t); - assert(f); - - fprintf(f, - "%sSlice State: %s\n", - prefix, slice_state_to_string(t->state)); - - cgroup_context_dump(&t->cgroup_context, f, prefix); -} - -static int slice_start(Unit *u) { - Slice *t = SLICE(u); - int r; - - assert(t); - assert(t->state == SLICE_DEAD); - - r = unit_acquire_invocation_id(u); - if (r < 0) - return r; - - (void) unit_realize_cgroup(u); - (void) unit_reset_cpu_usage(u); - - slice_set_state(t, SLICE_ACTIVE); - return 1; -} - -static int slice_stop(Unit *u) { - Slice *t = SLICE(u); - - assert(t); - assert(t->state == SLICE_ACTIVE); - - /* We do not need to destroy the cgroup explicitly, - * unit_notify() will do that for us anyway. */ - - slice_set_state(t, SLICE_DEAD); - return 1; -} - -static int slice_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { - return unit_kill_common(u, who, signo, -1, -1, error); -} - -static int slice_serialize(Unit *u, FILE *f, FDSet *fds) { - Slice *s = SLICE(u); - - assert(s); - assert(f); - assert(fds); - - unit_serialize_item(u, f, "state", slice_state_to_string(s->state)); - return 0; -} - -static int slice_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { - Slice *s = SLICE(u); - - assert(u); - assert(key); - assert(value); - assert(fds); - - if (streq(key, "state")) { - SliceState state; - - state = slice_state_from_string(value); - if (state < 0) - log_debug("Failed to parse state value %s", value); - else - s->deserialized_state = state; - - } else - log_debug("Unknown serialization key '%s'", key); - - return 0; -} - -_pure_ static UnitActiveState slice_active_state(Unit *u) { - assert(u); - - return state_translation_table[SLICE(u)->state]; -} - -_pure_ static const char *slice_sub_state_to_string(Unit *u) { - assert(u); - - return slice_state_to_string(SLICE(u)->state); -} - -static void slice_enumerate(Manager *m) { - Unit *u; - int r; - - assert(m); - - u = manager_get_unit(m, SPECIAL_ROOT_SLICE); - if (!u) { - r = unit_new_for_name(m, sizeof(Slice), SPECIAL_ROOT_SLICE, &u); - if (r < 0) { - log_error_errno(r, "Failed to allocate the special " SPECIAL_ROOT_SLICE " unit: %m"); - return; - } - } - - u->perpetual = true; - SLICE(u)->deserialized_state = SLICE_ACTIVE; - - unit_add_to_load_queue(u); - unit_add_to_dbus_queue(u); -} - -const UnitVTable slice_vtable = { - .object_size = sizeof(Slice), - .cgroup_context_offset = offsetof(Slice, cgroup_context), - - .sections = - "Unit\0" - "Slice\0" - "Install\0", - .private_section = "Slice", - - .can_transient = true, - - .init = slice_init, - .load = slice_load, - - .coldplug = slice_coldplug, - - .dump = slice_dump, - - .start = slice_start, - .stop = slice_stop, - - .kill = slice_kill, - - .serialize = slice_serialize, - .deserialize_item = slice_deserialize_item, - - .active_state = slice_active_state, - .sub_state_to_string = slice_sub_state_to_string, - - .bus_vtable = bus_slice_vtable, - .bus_set_property = bus_slice_set_property, - .bus_commit_properties = bus_slice_commit_properties, - - .enumerate = slice_enumerate, - - .status_message_formats = { - .finished_start_job = { - [JOB_DONE] = "Created slice %s.", - }, - .finished_stop_job = { - [JOB_DONE] = "Removed slice %s.", - }, - }, -}; |