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cgroup: add cgroupsification

This commit is contained in:
Lennart Poettering 2010-03-31 16:29:55 +02:00
parent c9dae904f3
commit 8e27452380
23 changed files with 1314 additions and 46 deletions
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1
.gitignore vendored
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@ -1,3 +1,4 @@
systemd-cgroups-agent
systemd
*.o
test-engine

64
Makefile.am
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@ -25,15 +25,19 @@ AM_CPPFLAGS = \
-DSYSTEM_DATA_UNIT_PATH=\"$(pkgdatadir)/system\" \
-DSYSTEM_SYSVINIT_PATH=\"$(sysconfdir)/init.d\" \
-DSESSION_CONFIG_UNIT_PATH=\"$(pkgsysconfdir)/session\" \
-DSESSION_DATA_UNIT_PATH=\"$(pkgdatadir)/session\"
-DSESSION_DATA_UNIT_PATH=\"$(pkgdatadir)/session\" \
-DCGROUP_AGENT_PATH=\"$(pkglibexecdir)/systemd-cgroups-agent\"
sbin_PROGRAMS = \
systemd
bin_PROGRAMS = \
systemctl \
systemadm \
systemd-logger
systemadm
pkglibexec_PROGRAMS = \
systemd-logger \
systemd-cgroups-agent
noinst_PROGRAMS = \
test-engine \
@ -41,34 +45,64 @@ noinst_PROGRAMS = \
BASIC_SOURCES= \
util.c \
util.h \
hashmap.c \
hashmap.h \
set.c \
set.h \
strv.c \
strv.h \
conf-parser.c \
conf-parser.h \
socket-util.c \
socket-util.h \
log.c \
ratelimit.c
log.h \
ratelimit.c \
ratelimit.h
COMMON_SOURCES= \
$(BASIC_SOURCES) \
unit.c \
unit.h \
job.c \
job.h \
manager.c \
manager.h \
load-fragment.c \
load-fragment.h \
service.c \
service.h \
automount.c \
automount.h \
mount.c \
mount.h \
device.c \
device.h \
target.c \
target.h \
snapshot.c \
snapshot.h \
socket.c \
socket.h \
timer.c \
timer.h \
load-dropin.c \
load-dropin.h \
execute.c \
execute.h \
dbus.c \
dbus.h \
dbus-manager.c \
dbus-manager.h \
dbus-unit.c \
dbus-job.c
dbus-unit.h \
dbus-job.c \
dbus-job.h \
cgroup.c \
cgroup.h \
mount-setup.c \
mount-setup.h
systemd_SOURCES = \
$(COMMON_SOURCES) \
@ -77,11 +111,13 @@ systemd_SOURCES = \
systemd_CPPFLAGS = \
$(AM_CPPFLAGS) \
$(DBUS_CFLAGS) \
$(UDEV_CFLAGS)
$(UDEV_CFLAGS) \
$(CGROUP_CFLAGS)
systemd_LDADD = \
$(DBUS_LIBS) \
$(UDEV_LIBS)
$(UDEV_LIBS) \
$(CGROUP_LIBS)
test_engine_SOURCES = \
$(COMMON_SOURCES) \
@ -101,6 +137,17 @@ systemd_logger_SOURCES = \
$(BASIC_SOURCES) \
logger.c
systemd_cgroups_agent_SOURCES = \
$(BASIC_SOURCES) \
cgroups-agent.c
systemd_cgroups_agent_CPPFLAGS = \
$(AM_CPPFLAGS) \
$(DBUS_CFLAGS)
systemd_cgroups_agent_LDADD = \
$(DBUS_LIBS)
VALAFLAGS = -g --save-temps --pkg=dbus-glib-1 --pkg=posix --pkg gee-1.0 --pkg gtk+-2.0
systemctl_SOURCES = \
@ -120,4 +167,5 @@ systemadm_LDADD = $(DBUSGLIB_LIBS) $(GTK_LIBS)
CLEANFILES = \
systemd-interfaces.c \
systemctl.c \
systemadm.c
systemadm.c \
systemd-cgroups-agent

523
cgroup.c Normal file
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@ -0,0 +1,523 @@
/*-*- 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 <assert.h>
#include <unistd.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/mount.h>
#include "cgroup.h"
#include "log.h"
static int translate_error(int error, int _errno) {
switch (error) {
case ECGROUPNOTCOMPILED:
case ECGROUPNOTMOUNTED:
case ECGROUPNOTEXIST:
case ECGROUPNOTCREATED:
return -ENOENT;
case ECGINVAL:
return -EINVAL;
case ECGROUPNOTALLOWED:
return -EPERM;
case ECGOTHER:
return -_errno;
}
return -EIO;
}
int cgroup_bonding_realize(CGroupBonding *b) {
int r;
assert(b);
assert(b->path);
assert(b->controller);
if (b->cgroup)
return 0;
if (!(b->cgroup = cgroup_new_cgroup(b->path)))
return -ENOMEM;
if (!cgroup_add_controller(b->cgroup, b->controller)) {
r = -ENOMEM;
goto fail;
}
if (b->inherit)
r = cgroup_create_cgroup_from_parent(b->cgroup, true);
else
r = cgroup_create_cgroup(b->cgroup, true);
if (r != 0) {
r = translate_error(r, errno);
goto fail;
}
return 0;
fail:
cgroup_free(&b->cgroup);
b->cgroup = NULL;
return r;
}
int cgroup_bonding_realize_list(CGroupBonding *first) {
CGroupBonding *b;
LIST_FOREACH(by_unit, b, first) {
int r;
if ((r = cgroup_bonding_realize(b)) < 0)
return r;
}
return 0;
}
void cgroup_bonding_free(CGroupBonding *b) {
assert(b);
if (b->unit) {
CGroupBonding *f;
LIST_REMOVE(CGroupBonding, by_unit, b->unit->meta.cgroup_bondings, b);
assert_se(f = hashmap_get(b->unit->meta.manager->cgroup_bondings, b->path));
LIST_REMOVE(CGroupBonding, by_path, f, b);
if (f)
hashmap_replace(b->unit->meta.manager->cgroup_bondings, b->path, f);
else
hashmap_remove(b->unit->meta.manager->cgroup_bondings, b->path);
}
free(b->controller);
free(b->path);
if (b->cgroup) {
if (b->only_us && b->clean_up)
cgroup_delete_cgroup(b->cgroup, true);
cgroup_free(&b->cgroup);
}
free(b);
}
void cgroup_bonding_free_list(CGroupBonding *first) {
CGroupBonding *b, *n;
LIST_FOREACH_SAFE(by_unit, b, n, first)
cgroup_bonding_free(b);
}
int cgroup_bonding_install(CGroupBonding *b, pid_t pid) {
int r;
assert(b);
assert(pid >= 0);
if (pid == 0)
pid = getpid();
if (!b->cgroup)
return -ENOENT;
if ((r = cgroup_attach_task_pid(b->cgroup, pid)))
return translate_error(r, errno);
return 0;
}
int cgroup_bonding_install_list(CGroupBonding *first, pid_t pid) {
CGroupBonding *b;
LIST_FOREACH(by_unit, b, first) {
int r;
if ((r = cgroup_bonding_install(b, pid)) < 0)
return r;
}
return 0;
}
int cgroup_bonding_kill(CGroupBonding *b, int sig) {
int r;
Set *s;
bool done;
assert(b);
assert(sig > 0);
if (!(s = set_new(trivial_hash_func, trivial_compare_func)))
return -ENOMEM;
do {
void *iterator;
pid_t pid;
done = true;
if ((r = cgroup_get_task_begin(b->path, b->controller, &iterator, &pid)) != 0) {
if (r == ECGEOF) {
r = 0;
goto kill_done;
} else {
r = translate_error(r, errno);
break;
}
}
for (;;) {
if (set_get(s, INT_TO_PTR(pid)) != INT_TO_PTR(pid)) {
/* If we haven't killed this process
* yet, kill it */
if (kill(pid, sig) < 0 && errno != ESRCH) {
r = -errno;
break;
}
done = false;
if ((r = set_put(s, INT_TO_PTR(pid))) < 0)
break;
}
if ((r = cgroup_get_task_next(&iterator, &pid)) != 0) {
if (r == ECGEOF)
r = 0;
else
r = translate_error(r, errno);
break;
}
}
kill_done:
assert_se(cgroup_get_task_end(&iterator) == 0);
/* To avoid racing against processes which fork
* quicker than we can kill them we repeat this until
* no new pids need to be killed. */
} while (!done && r >= 0);
set_free(s);
return r;
}
int cgroup_bonding_kill_list(CGroupBonding *first, int sig) {
CGroupBonding *b;
LIST_FOREACH(by_unit, b, first) {
int r;
if ((r = cgroup_bonding_kill(b, sig)) < 0)
return r;
}
return 0;
}
/* Returns 1 if the group is empty, 0 if it is not, -EAGAIN if we
* cannot know */
int cgroup_bonding_is_empty(CGroupBonding *b) {
void *iterator;
pid_t pid;
int r;
assert(b);
r = cgroup_get_task_begin(b->path, b->controller, &iterator, &pid);
if (r == 0 || r == ECGEOF)
cgroup_get_task_end(&iterator);
/* Hmm, no PID in this group? Then it is definitely empty */
if (r == ECGEOF)
return 1;
/* Some error? Let's return it */
if (r != 0)
return translate_error(r, errno);
/* It's not empty, and we are the only user, then it is
* definitely not empty */
if (b->only_us)
return 0;
/* There are PIDs in the group but we aren't the only users,
* hence we cannot say */
return -EAGAIN;
}
int cgroup_bonding_is_empty_list(CGroupBonding *first) {
CGroupBonding *b;
LIST_FOREACH(by_unit, b, first) {
int r;
if ((r = cgroup_bonding_is_empty(b)) < 0) {
/* If this returned -EAGAIN, then we don't know if the
* group is empty, so let's see if another group can
* tell us */
if (r != -EAGAIN)
return r;
} else
return r;
}
return -EAGAIN;
}
static int install_release_agent(Manager *m, const char *mount_point) {
char *p, *c, *sc;
int r;
assert(m);
assert(mount_point);
if (asprintf(&p, "%s/release_agent", mount_point) < 0)
return -ENOMEM;
if ((r = read_one_line_file(p, &c)) < 0) {
free(p);
return r;
}
sc = strstrip(c);
if (sc[0] == 0) {
if ((r = write_one_line_file(p, CGROUP_AGENT_PATH "\n" )) < 0) {
free(p);
free(c);
return r;
}
} else if (!streq(sc, CGROUP_AGENT_PATH)) {
free(p);
free(c);
return -EEXIST;
}
free(c);
free(p);
if (asprintf(&p, "%s/notify_on_release", mount_point) < 0)
return -ENOMEM;
if ((r = read_one_line_file(p, &c)) < 0) {
free(p);
return r;
}
sc = strstrip(c);
if (streq(sc, "0")) {
if ((r = write_one_line_file(p, "1\n")) < 0) {
free(p);
free(c);
return r;
}
} else if (!streq(sc, "1")) {
free(p);
free(c);
return -EIO;
}
return 0;
}
static int create_hierarchy_cgroup(Manager *m) {
struct cgroup *cg;
int r;
assert(m);
if (!(cg = cgroup_new_cgroup(m->cgroup_hierarchy)))
return -ENOMEM;
if (!(cgroup_add_controller(cg, m->cgroup_controller))) {
r = -ENOMEM;
goto finish;
}
if ((r = cgroup_create_cgroup(cg, true)) != 0) {
log_error("Failed to create cgroup hierarchy group: %s", cgroup_strerror(r));
r = translate_error(r, errno);
goto finish;
}
if ((r = cgroup_attach_task(cg)) != 0) {
log_error("Failed to add ourselves to hierarchy group: %s", cgroup_strerror(r));
r = translate_error(r, errno);
goto finish;
}
r = 0;
finish:
cgroup_free(&cg);
return r;
}
int manager_setup_cgroup(Manager *m) {
char *mp, *cp;
int r;
pid_t pid;
assert(m);
if ((r = cgroup_init()) != 0) {
log_error("Failed to initialize libcg: %s", cgroup_strerror(r));
return translate_error(r, errno);
}
free(m->cgroup_controller);
if (!(m->cgroup_controller = strdup("debug")))
return -ENOMEM;
if ((r = cgroup_get_subsys_mount_point(m->cgroup_controller, &mp)))
return translate_error(r, errno);
pid = getpid();
if ((r = cgroup_get_current_controller_path(pid, m->cgroup_controller, &cp))) {
free(mp);
return translate_error(r, errno);
}
free(m->cgroup_hierarchy);
m->cgroup_hierarchy = NULL;
if (asprintf(&m->cgroup_hierarchy, "%s/systemd-%llu", strcmp(cp, "/") == 0 ? "" : cp, (unsigned long long) pid) < 0) {
free(cp);
free(mp);
return -ENOMEM;
}
log_info("Using cgroup controller <%s>, hierarchy mounted at <%s>, using root group <%s>.",
m->cgroup_controller,
mp,
m->cgroup_hierarchy);
if ((r = install_release_agent(m, mp)) < 0)
log_warning("Failed to install release agent, ignoring: %s", strerror(-r));
else
log_info("Installed release agent, or already installed.");
free(mp);
free(cp);
if ((r = create_hierarchy_cgroup(m)) < 0)
log_error("Failed to create root cgroup hierarchy: %s", strerror(-r));
else
log_info("Created root group.");
return r;
}
int manager_shutdown_cgroup(Manager *m) {
struct cgroup *cg;
int r;
assert(m);
if (!m->cgroup_hierarchy)
return 0;
if (!(cg = cgroup_new_cgroup(m->cgroup_hierarchy)))
return -ENOMEM;
if (!(cgroup_add_controller(cg, m->cgroup_controller))) {
r = -ENOMEM;
goto finish;
}
if ((r = cgroup_delete_cgroup_ext(cg, CGFLAG_DELETE_IGNORE_MIGRATION|CGFLAG_DELETE_RECURSIVE)) != 0) {
log_error("Failed to delete cgroup hierarchy group: %s", cgroup_strerror(r));
r = translate_error(r, errno);
goto finish;
}
r = 0;
finish:
cgroup_free(&cg);
return r;
}
int cgroup_notify_empty(Manager *m, const char *group) {
CGroupBonding *l, *b;
assert(m);
assert(group);
if (!(l = hashmap_get(m->cgroup_bondings, group)))
return 0;
LIST_FOREACH(by_path, b, l) {
int t;
if (!b->unit)
continue;
if ((t = cgroup_bonding_is_empty_list(b)) < 0) {
/* If we don't know, we don't know */
if (t != -EAGAIN)
log_warning("Failed to check whether cgroup is empty: %s", strerror(errno));
continue;
}
if (t > 0)
if (UNIT_VTABLE(b->unit)->cgroup_notify_empty)
UNIT_VTABLE(b->unit)->cgroup_notify_empty(b->unit);
}
return 0;
}
CGroupBonding *cgroup_bonding_find_list(CGroupBonding *first, const char *controller) {
CGroupBonding *b;
assert(controller);
LIST_FOREACH(by_unit, b, first)
if (streq(b->controller, controller))
return b;
return NULL;
}

83
cgroup.h Normal file
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@ -0,0 +1,83 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
#ifndef foocgrouphfoo
#define foocgrouphfoo
/***
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 <libcgroup.h>
typedef struct CGroupBonding CGroupBonding;
#include "unit.h"
/* Binds a cgroup to a name */
struct CGroupBonding {
char *controller;
char *path;
Unit *unit;
struct cgroup *cgroup;
/* When shutting down, kill all tasks? */
bool kill_all:1;
/* When shutting down, remove cgroup? */
bool clean_up:1;
/* When our tasks are the only ones in this group */
bool only_us:1;
/* Inherit parameters from parent group */
bool inherit:1;
/* For the Unit::cgroup_bondings list */
LIST_FIELDS(CGroupBonding, by_unit);
/* For the Manager::cgroup_bondings hashmap */
LIST_FIELDS(CGroupBonding, by_path);
};
int cgroup_bonding_realize(CGroupBonding *b);
int cgroup_bonding_realize_list(CGroupBonding *first);
void cgroup_bonding_free(CGroupBonding *b);
void cgroup_bonding_free_list(CGroupBonding *first);
int cgroup_bonding_install(CGroupBonding *b, pid_t pid);
int cgroup_bonding_install_list(CGroupBonding *first, pid_t pid);
int cgroup_bonding_kill(CGroupBonding *b, int sig);
int cgroup_bonding_kill_list(CGroupBonding *first, int sig);
int cgroup_bonding_is_empty(CGroupBonding *b);
int cgroup_bonding_is_empty_list(CGroupBonding *first);
CGroupBonding *cgroup_bonding_find_list(CGroupBonding *first, const char *controller);
#include "manager.h"
int manager_setup_cgroup(Manager *m);
int manager_shutdown_cgroup(Manager *m);
int cgroup_notify_empty(Manager *m, const char *group);
#endif

72
cgroups-agent.c Normal file
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@ -0,0 +1,72 @@
/*-*- 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 <dbus/dbus.h>
#include "log.h"
int main(int argc, char *argv[]) {
DBusError error;
DBusConnection *bus = NULL;
DBusMessage *m = NULL;
int r = 1;
dbus_error_init(&error);
if (argc != 2) {
log_error("Incorrect number of arguments.");
goto finish;
}
if (!(bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error))) {
log_error("Failed to get D-Bus connection: %s", error.message);
goto finish;
}
if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1/agent", "org.freedesktop.systemd1.Agent", "Released"))) {
log_error("Could not allocate signal message.");
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &argv[1],
DBUS_TYPE_INVALID)) {
log_error("Could not attach group information to signal message.");
goto finish;
}
if (!dbus_connection_send(bus, m, NULL)) {
log_error("Failed to send signal message.");
goto finish;
}
r = 0;
finish:
if (bus)
dbus_connection_unref(bus);
if (m)
dbus_message_unref(m);
dbus_error_free(&error);
return r;
}

4
configure.ac
View File

@ -69,6 +69,10 @@ PKG_CHECK_MODULES(GTK, [ gtk+-2.0 ])
AC_SUBST(GTK_CFLAGS)
AC_SUBST(GTK_LIBS)
PKG_CHECK_MODULES(CGROUP, [ libcgroup ])
AC_SUBST(CGROUP_CFLAGS)
AC_SUBST(CGROUP_LIBS)
AM_PROG_VALAC()
AC_SUBST(VAPIDIR)

137
dbus.c
View File

@ -29,16 +29,28 @@
#include "dbus.h"
#include "log.h"
#include "strv.h"
#include "cgroup.h"
static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
Manager *m = data;
assert(bus);
assert(m);
assert(m->bus == bus);
m->request_bus_dispatch = status != DBUS_DISPATCH_COMPLETE;
}
static void system_bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
Manager *m = data;
assert(bus);
assert(m);
assert(m->system_bus == bus);
m->request_system_bus_dispatch = status != DBUS_DISPATCH_COMPLETE;
}
static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
unsigned flags;
uint32_t events = 0;
@ -81,7 +93,7 @@ void bus_watch_event(Manager *m, Watch *w, int events) {
/* This is called by the event loop whenever there is
* something happening on D-Bus' file handles. */
if (!(dbus_watch_get_enabled(w->data.bus_watch)))
if (!dbus_watch_get_enabled(w->data.bus_watch))
return;
dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events));
@ -315,16 +327,57 @@ static DBusHandlerResult bus_message_filter(DBusConnection *connection, DBusMes
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
Manager *m = data;
DBusError error;
assert(connection);
assert(message);
assert(m);
dbus_error_init(&error);
/* log_debug("Got D-Bus request: %s.%s() on %s", */
/* dbus_message_get_interface(message), */
/* dbus_message_get_member(message), */
/* dbus_message_get_path(message)); */
if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
log_error("Warning! D-Bus connection terminated.");
/* FIXME: we probably should restart D-Bus here */
} if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
const char *cgroup;
if (!dbus_message_get_args(message, &error,
DBUS_TYPE_STRING, &cgroup,
DBUS_TYPE_INVALID))
log_error("Failed to parse Released message: %s", error.message);
else
cgroup_notify_empty(m, cgroup);
}
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
unsigned bus_dispatch(Manager *m) {
assert(m);
if (!m->request_bus_dispatch)
return 0;
if (m->request_bus_dispatch)
if (dbus_connection_dispatch(m->bus) == DBUS_DISPATCH_COMPLETE) {
m->request_bus_dispatch = false;
return 1;
}
if (dbus_connection_dispatch(m->bus) == DBUS_DISPATCH_COMPLETE)
m->request_bus_dispatch = false;
if (m->request_system_bus_dispatch)
if (dbus_connection_dispatch(m->system_bus) == DBUS_DISPATCH_COMPLETE) {
m->request_system_bus_dispatch = false;
return 1;
}
return 1;
return 0;
}
static int request_name(Manager *m) {
@ -362,6 +415,18 @@ static int request_name(Manager *m) {
return 0;
}
static int bus_setup_loop(Manager *m, DBusConnection *bus) {
assert(m);
assert(bus);
dbus_connection_set_exit_on_disconnect(bus, FALSE);
if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
!dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL))
return -ENOMEM;
return 0;
}
int bus_init(Manager *m) {
DBusError error;
char *id;
@ -381,17 +446,39 @@ int bus_init(Manager *m) {
if (!(m->bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
log_error("Failed to get D-Bus connection: %s", error.message);
dbus_error_free(&error);
bus_done(m);
return -ECONNREFUSED;
}
dbus_connection_set_exit_on_disconnect(m->bus, FALSE);
if ((r = bus_setup_loop(m, m->bus)) < 0) {
bus_done(m);
return r;
}
dbus_connection_set_dispatch_status_function(m->bus, bus_dispatch_status, m, NULL);
if (!dbus_connection_set_watch_functions(m->bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
!dbus_connection_set_timeout_functions(m->bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL) ||
!dbus_connection_register_object_path(m->bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
if (m->running_as == MANAGER_SESSION) {
if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
log_error("Failed to get D-Bus connection: %s", error.message);
dbus_error_free(&error);
bus_done(m);
return -ECONNREFUSED;
}
if ((r = bus_setup_loop(m, m->system_bus)) < 0) {
bus_done(m);
return r;
}
dbus_connection_set_dispatch_status_function(m->system_bus, system_bus_dispatch_status, m, NULL);
} else
m->system_bus = m->bus;
if (!dbus_connection_register_object_path(m->bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
!dbus_connection_register_fallback(m->bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
!dbus_connection_register_fallback(m->bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
!dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) {
!dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL) ||
!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
bus_done(m);
return -ENOMEM;
}
@ -406,7 +493,6 @@ int bus_init(Manager *m) {
if (dbus_error_is_set(&error)) {
log_error("Failed to register match: %s", error.message);
dbus_error_free(&error);
bus_done(m);
return -ENOMEM;
}
@ -415,12 +501,31 @@ int bus_init(Manager *m) {
return r;
}
dbus_bus_add_match(m->system_bus,
"type='signal',"
"interface='org.freedesktop.systemd1.Agent',"
"path='/org/freedesktop/systemd1/agent'",
&error);
if (dbus_error_is_set(&error)) {
log_error("Failed to register match: %s", error.message);
dbus_error_free(&error);
bus_done(m);
return -ENOMEM;
}
log_debug("Successfully connected to D-Bus bus %s as %s",
strnull((id = dbus_connection_get_server_id(m->bus))),
strnull(dbus_bus_get_unique_name(m->bus)));
dbus_free(id);
log_debug("Successfully connected to system D-Bus bus %s as %s",
strnull((id = dbus_connection_get_server_id(m->system_bus))),
strnull(dbus_bus_get_unique_name(m->system_bus)));
dbus_free(id);
m->request_bus_dispatch = true;
m->request_system_bus_dispatch = true;
return 0;
}
@ -428,6 +533,12 @@ int bus_init(Manager *m) {
void bus_done(Manager *m) {
assert(m);
if (m->system_bus && m->system_bus != m->bus) {
dbus_connection_close(m->system_bus);
dbus_connection_unref(m->system_bus);
m->system_bus = NULL;
}
if (m->bus) {
dbus_connection_close(m->bus);
dbus_connection_unref(m->bus);
@ -571,8 +682,6 @@ oom:
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
static const char *error_to_dbus(int error) {
switch(error) {

15
execute.c
View File

@ -42,6 +42,7 @@
#include "log.h"
#include "ioprio.h"
#include "securebits.h"
#include "cgroup.h"
static int close_fds(int except[], unsigned n_except) {
DIR *d;
@ -508,9 +509,11 @@ int exec_spawn(const ExecCommand *command,
int *fds, unsigned n_fds,
bool apply_permissions,
bool apply_chroot,
CGroupBonding *cgroup_bondings,
pid_t *ret) {
pid_t pid;
int r;
assert(command);
assert(context);
@ -519,11 +522,15 @@ int exec_spawn(const ExecCommand *command,
log_debug("About to execute %s", command->path);
if (cgroup_bondings)
if ((r = cgroup_bonding_realize_list(cgroup_bondings)))
return r;
if ((pid = fork()) < 0)
return -errno;
if (pid == 0) {
int i, r;
int i;
sigset_t ss;
const char *username = NULL, *home = NULL;
uid_t uid = (uid_t) -1;
@ -556,6 +563,12 @@ int exec_spawn(const ExecCommand *command,
goto fail;
}
if (cgroup_bondings)
if ((r = cgroup_bonding_install_list(cgroup_bondings, 0)) < 0) {
r = EXIT_CGROUP;
goto fail;
}
if (context->oom_adjust_set) {
char t[16];

6
execute.h
View File

@ -33,6 +33,8 @@ typedef struct ExecContext ExecContext;
#include <stdio.h>
#include <sched.h>
struct CGroupBonding;
#include "list.h"
#include "util.h"
@ -145,7 +147,8 @@ typedef enum ExitStatus {
EXIT_CPUAFFINITY,
EXIT_GROUP,
EXIT_USER,
EXIT_CAPABILITIES
EXIT_CAPABILITIES,
EXIT_CGROUP
} ExitStatus;
int exec_spawn(const ExecCommand *command,
@ -153,6 +156,7 @@ int exec_spawn(const ExecCommand *command,
int *fds, unsigned n_fds,
bool apply_permissions,
bool apply_chroot,
struct CGroupBonding *cgroup_bondings,
pid_t *ret);
void exec_command_free_list(ExecCommand *c);

35
load-fragment.c
View File

@ -943,6 +943,37 @@ static int config_parse_limit(
return 0;
}
static int config_parse_cgroup(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
const char *rvalue,
void *data,
void *userdata) {
Unit *u = userdata;
char *w;
size_t l;
char *state;
FOREACH_WORD(w, l, rvalue, state) {
char *t;
int r;
if (!(t = strndup(w, l)))
return -ENOMEM;
r = unit_add_cgroup_from_text(u, t);
free(t);
if (r < 0)
return r;
}
return 0;
}
#define FOLLOW_MAX 8
static int open_follow(char **filename, FILE **_f, Set *names, char **_id) {
@ -1067,7 +1098,8 @@ static int load_from_path(Unit *u, const char *path) {
{ "LimitNICE", config_parse_limit, &(context).rlimit[RLIMIT_NICE], section }, \
{ "LimitRTPRIO", config_parse_limit, &(context).rlimit[RLIMIT_RTPRIO], section }, \
{ "LimitRTTIME", config_parse_limit, &(context).rlimit[RLIMIT_RTTIME], section }, \
{ "NonBlocking", config_parse_bool, &(context).non_blocking, section }
{ "NonBlocking", config_parse_bool, &(context).non_blocking, section }, \
{ "ControlGroup", config_parse_cgroup, u, section } \
const ConfigItem items[] = {
{ "Names", config_parse_names, u, "Meta" },
@ -1096,6 +1128,7 @@ static int load_from_path(Unit *u, const char *path) {
{ "Restart", config_parse_service_restart, &u->service, "Service" },
{ "PermissionsStartOnly", config_parse_bool, &u->service.permissions_start_only, "Service" },
{ "RootDirectoryStartOnly", config_parse_bool, &u->service.root_directory_start_only, "Service" },
{ "ValidNoProcess", config_parse_bool, &u->service.valid_no_process, "Service" },
EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
{ "ListenStream", config_parse_listen, &u->socket, "Socket" },

4
main.c
View File

@ -37,8 +37,8 @@ int main(int argc, char *argv[]) {
assert_se(set_unit_path("test1") >= 0);
if (!(m = manager_new())) {
log_error("Failed to allocate manager object: %s", strerror(ENOMEM));
if ((r = manager_new(&m)) < 0) {
log_error("Failed to allocate manager object: %s", strerror(-r));
goto finish;
}

38
manager.c
View File

@ -31,6 +31,7 @@
#include <sys/reboot.h>
#include <sys/ioctl.h>
#include <linux/kd.h>
#include <libcgroup.h>
#include "manager.h"
#include "hashmap.h"
@ -39,6 +40,8 @@
#include "log.h"
#include "util.h"
#include "ratelimit.h"
#include "cgroup.h"
#include "mount-setup.h"
static int manager_setup_signals(Manager *m) {
sigset_t mask;
@ -254,11 +257,14 @@ static int manager_find_paths(Manager *m) {
return 0;
}
Manager* manager_new(void) {
int manager_new(Manager **_m) {
Manager *m;
int r = -ENOMEM;
assert(_m);
if (!(m = new0(Manager, 1)))
return NULL;
return -ENOMEM;
m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
@ -275,6 +281,9 @@ Manager* manager_new(void) {
if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
goto fail;
if (!(m->cgroup_bondings = hashmap_new(string_hash_func, string_compare_func)))
goto fail;
if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
goto fail;
@ -287,7 +296,7 @@ Manager* manager_new(void) {
log_debug("systemd running in %s mode.", manager_running_as_to_string(m->running_as));
if (manager_find_paths(m) < 0)
if ((r = manager_find_paths(m)) < 0)
goto fail;
if (chdir("/") < 0)
@ -296,18 +305,25 @@ Manager* manager_new(void) {
/* Become a session leader if we aren't one yet. */
setsid();
if (manager_setup_signals(m) < 0)
if ((r = manager_setup_signals(m)) < 0)
goto fail;
if ((r = mount_setup()) < 0)
goto fail;
if ((r = manager_setup_cgroup(m)) < 0)
goto fail;
/* FIXME: this should be called only when the D-Bus bus daemon is running */
if (bus_init(m) < 0)
if ((r = bus_init(m)) < 0)
goto fail;
return m;
*_m = m;
return 0;
fail:
manager_free(m);
return NULL;
return r;
}
void manager_free(Manager *m) {
@ -327,6 +343,8 @@ void manager_free(Manager *m) {
if (unit_vtable[c]->shutdown)
unit_vtable[c]->shutdown(m);
manager_shutdown_cgroup(m);
bus_done(m);
hashmap_free(m->units);
@ -342,6 +360,12 @@ void manager_free(Manager *m) {
strv_free(m->unit_path);
strv_free(m->sysvinit_path);
free(m->cgroup_controller);
free(m->cgroup_hierarchy);
assert(hashmap_isempty(m->cgroup_bondings));
hashmap_free(m->cgroup_bondings);
free(m);
}

10
manager.h
View File

@ -133,6 +133,7 @@ struct Manager {
bool dispatching_dbus_queue:1;
bool request_bus_dispatch:1;
bool request_system_bus_dispatch:1;
Hashmap *watch_pids; /* pid => Unit object n:1 */
@ -153,11 +154,16 @@ struct Manager {
Watch mount_watch;
/* Data specific to the D-Bus subsystem */
DBusConnection *bus;
DBusConnection *bus, *system_bus;
Set *subscribed;
/* Data specific to the cgroup subsystem */
Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
char *cgroup_controller;
char *cgroup_hierarchy;
};
Manager* manager_new(void);
int manager_new(Manager **m);
void manager_free(Manager *m);
int manager_coldplug(Manager *m);

112
mount-setup.c Normal file
View File

@ -0,0 +1,112 @@
/*-*- 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 <sys/mount.h>
#include <errno.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <assert.h>
#include "mount-setup.h"
#include "log.h"
enum {
MOUNT_WHAT,
MOUNT_WHERE,
MOUNT_TYPE,
MOUNT_OPTIONS,
MOUNT_SKIP
};
static const char *table[] = {
"/proc", "/proc", "proc", "rw",
"/sys", "/sys", "sysfs", "rw",
"cgroup", "/cgroup/debug", "cgroup", "debug",
NULL
};
static int is_mount_point(const char *t) {
struct stat a, b;
char *copy;
if (lstat(t, &a) < 0) {
if (errno == ENOENT)
return 0;
return -errno;
}
if (!(copy = strdup(t)))
return -ENOMEM;
if (lstat(dirname(copy), &b) < 0) {
free(copy);
return -errno;
}
free(copy);
return a.st_dev != b.st_dev;
}
static int mount_one(const char *t[]) {
int r;
assert(t);
if ((r = is_mount_point(t[MOUNT_WHERE])) < 0)
return r;
if (r > 0)
return 0;
log_debug("Mounting %s to %s of type %s with options %s.",
t[MOUNT_WHAT],
t[MOUNT_WHERE],
t[MOUNT_TYPE],
t[MOUNT_OPTIONS]);
if (mount(t[MOUNT_WHAT],
t[MOUNT_WHERE],
t[MOUNT_TYPE],
0,
t[MOUNT_OPTIONS]) < 0) {
log_error("Failed to mount %s: %s", t[MOUNT_WHERE], strerror(errno));
return -errno;
}
return 0;
}
int mount_setup(void) {
int r;
const char **t;
for (t = table; *t; t += MOUNT_SKIP)
if ((r = mount_one(t)) < 0)
return r;
return 0;
}

27
mount-setup.h Normal file
View File

@ -0,0 +1,27 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
#ifndef foomountsetuphfoo
#define foomountsetuphfoo
/***
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/>.
***/
int mount_setup(void);
#endif

55
service.c
View File

@ -581,6 +581,12 @@ static int service_init(Unit *u) {
return r;
}
/* Add default cgroup */
if ((r = unit_add_default_cgroup(u)) < 0) {
service_done(u);
return r;
}
return 0;
}
@ -599,10 +605,12 @@ static void service_dump(Unit *u, FILE *f, const char *prefix) {
fprintf(f,
"%sService State: %s\n"
"%sPermissionsStartOnly: %s\n"
"%sRootDirectoryStartOnly: %s\n",
"%sRootDirectoryStartOnly: %s\n"
"%sValidNoProcess: %s\n",
prefix, service_state_to_string(s->state),
prefix, yes_no(s->permissions_start_only),
prefix, yes_no(s->root_directory_start_only));
prefix, yes_no(s->root_directory_start_only),
prefix, yes_no(s->valid_no_process));
if (s->pid_file)
fprintf(f,
@ -898,6 +906,7 @@ static int service_spawn(
fds, n_fds,
apply_permissions,
apply_chroot,
UNIT(s)->meta.cgroup_bondings,
&pid)) < 0)
goto fail;
@ -1336,7 +1345,7 @@ static int main_pid_good(Service *s) {
return s->main_pid > 0;
/* We don't know the pid */
return -1;
return -EAGAIN;
}
static bool control_pid_good(Service *s) {
@ -1345,6 +1354,15 @@ static bool control_pid_good(Service *s) {
return s->control_pid > 0;
}
static int cgroup_good(Service *s) {
assert(s);
if (s->valid_no_process)
return -EAGAIN;
return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
}
static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
Service *s = SERVICE(u);
bool success;
@ -1477,7 +1495,7 @@ static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
case SERVICE_RELOAD:
if (success) {
if (main_pid_good(s) != 0)
if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
service_set_state(s, SERVICE_RUNNING);
else
service_enter_stop(s, true);
@ -1580,6 +1598,33 @@ static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
}
}
static void service_cgroup_notify_event(Unit *u) {
Service *s = SERVICE(u);
assert(u);
log_debug("%s: cgroup is empty", unit_id(u));
switch (s->state) {
/* Waiting for SIGCHLD is usually more interesting,
* because it includes return codes/signals. Which is
* why we ignore the cgroup events for most cases,
* except when we don't know pid which to expect the
* SIGCHLD for. */
case SERVICE_RUNNING:
if (!s->valid_no_process && main_pid_good(s) <= 0)
service_enter_stop(s, true);
break;
default:
;
}
}
static int service_enumerate(Manager *m) {
static const char * const rcnd[] = {
@ -1753,5 +1798,7 @@ const UnitVTable service_vtable = {
.sigchld_event = service_sigchld_event,
.timer_event = service_timer_event,
.cgroup_notify_empty = service_cgroup_notify_event,
.enumerate = service_enumerate
};

1
service.h
View File

@ -90,6 +90,7 @@ struct Service {
bool permissions_start_only;
bool root_directory_start_only;
bool valid_no_process;
ServiceState state;

12
socket.c
View File

@ -129,6 +129,10 @@ static int socket_init(Unit *u) {
if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(s->service))) < 0)
goto fail;
/* Add default cgroup */
if ((r = unit_add_default_cgroup(u)) < 0)
goto fail;
return 0;
fail:
@ -394,7 +398,13 @@ static int socket_spawn(Socket *s, ExecCommand *c, bool timeout, pid_t *_pid) {
} else
unit_unwatch_timer(UNIT(s), &s->timer_watch);
if ((r = exec_spawn(c, &s->exec_context, NULL, 0, true, true, &pid)) < 0)
if ((r = exec_spawn(c,
&s->exec_context,
NULL, 0,
true,
true,
UNIT(s)->meta.cgroup_bondings,
&pid)) < 0)
goto fail;
if ((r = unit_watch_pid(UNIT(s), pid)) < 0)

2
test-engine.c
View File

@ -33,7 +33,7 @@ int main(int argc, char *argv[]) {
assert_se(set_unit_path("test2") >= 0);
assert_se(m = manager_new());
assert_se(manager_new(&m) >= 0);
printf("Load1:\n");
assert_se(manager_load_unit(m, "a.service", &a) == 0);

6
test1/exec-demo.service
View File

@ -2,6 +2,8 @@
Description=Simple Execution Demo
[Service]
ExecStart=/bin/cat /etc/hosts
Type=simple
ExecStartPre=/bin/ps -eo pid,uid,args,cgroup
ExecStartPre=/bin/cat /etc/hosts
ExecStart=/bin/bash -c '/bin/sleep 5 &'
Type=forking
Output=syslog

140
unit.c
View File

@ -260,6 +260,8 @@ void unit_free(Unit *u) {
/* Detach from next 'bigger' objects */
cgroup_bonding_free_list(u->meta.cgroup_bondings);
SET_FOREACH(t, u->meta.names, i)
hashmap_remove_value(u->meta.manager->units, t, u);
@ -369,12 +371,12 @@ const char *unit_description(Unit *u) {
}
void unit_dump(Unit *u, FILE *f, const char *prefix) {
char *t;
UnitDependency d;
Iterator i;
char *p2;
const char *prefix2;
CGroupBonding *b;
assert(u);
@ -413,6 +415,10 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), unit_id(other));
}
LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings)
fprintf(f, "%s\tControlGroup: %s:%s\n",
prefix, b->controller, b->path);
if (UNIT_VTABLE(u)->dump)
UNIT_VTABLE(u)->dump(u, f, prefix2);
@ -1060,6 +1066,138 @@ char *unit_dbus_path(Unit *u) {
return p;
}
int unit_add_cgroup(Unit *u, CGroupBonding *b) {
CGroupBonding *l;
int r;
assert(u);
assert(b);
assert(b->path);
/* Ensure this hasn't been added yet */
assert(!b->unit);
l = hashmap_get(u->meta.manager->cgroup_bondings, b->path);
LIST_PREPEND(CGroupBonding, by_path, l, b);
if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) {
LIST_REMOVE(CGroupBonding, by_path, l, b);
return r;
}
LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b);
b->unit = u;
return 0;
}
int unit_add_cgroup_from_text(Unit *u, const char *name) {
size_t n;
const char *p;
char *controller;
CGroupBonding *b;
int r;
assert(u);
assert(name);
/* Detect controller name */
n = strcspn(name, ":/");
/* Only controller name, no path? No path? */
if (name[n] == 0)
return -EINVAL;
if (n > 0) {
if (name[n] != ':')
return -EINVAL;
p = name+n+1;
} else
p = name;
/* Insist in absolute paths */
if (p[0] != '/')
return -EINVAL;
if (!(controller = strndup(name, n)))
return -ENOMEM;
if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) {
free(controller);
return -EEXIST;
}
if (!(b = new0(CGroupBonding, 1))) {
free(controller);
return -ENOMEM;
}
b->controller = controller;
if (!(b->path = strdup(p))) {
r = -ENOMEM;
goto fail;
}
b->only_us = false;
b->clean_up = false;
if ((r = unit_add_cgroup(u, b)) < 0)
goto fail;
return 0;
fail:
free(b->path);
free(b->controller);
free(b);
return r;
}
int unit_add_default_cgroup(Unit *u) {
CGroupBonding *b;
int r = -ENOMEM;
assert(u);
/* Adds in the default cgroup data, if it wasn't specified yet */
if (unit_get_default_cgroup(u))
return 0;
if (!(b = new0(CGroupBonding, 1)))
return -ENOMEM;
if (!(b->controller = strdup(u->meta.manager->cgroup_controller)))
goto fail;
if (asprintf(&b->path, "%s/%s", u->meta.manager->cgroup_hierarchy, unit_id(u)) < 0)
goto fail;
b->clean_up = true;
b->only_us = true;
if ((r = unit_add_cgroup(u, b)) < 0)
goto fail;
return 0;
fail:
free(b->path);
free(b->controller);
free(b);
return r;
}
CGroupBonding* unit_get_default_cgroup(Unit *u) {
assert(u);
return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller);
}
static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
[UNIT_SERVICE] = "service",
[UNIT_TIMER] = "timer",

11
unit.h
View File

@ -112,6 +112,7 @@ enum UnitDependency {
#include "manager.h"
#include "job.h"
#include "cgroup.h"
struct Meta {
Manager *manager;
@ -143,6 +144,9 @@ struct Meta {
usec_t active_enter_timestamp;
usec_t active_exit_timestamp;
/* Counterparts in the cgroup filesystem */
CGroupBonding *cgroup_bondings;
/* Load queue */
LIST_FIELDS(Meta, load_queue);
@ -197,6 +201,8 @@ struct UnitVTable {
void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w);
void (*cgroup_notify_empty)(Unit *u);
/* This is called for each unit type and should be used to
* enumerate existing devices and load them. However,
* everything that is loaded here should still stay in
@ -244,6 +250,11 @@ int unit_add_name(Unit *u, const char *name);
int unit_add_dependency(Unit *u, UnitDependency d, Unit *other);
int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name);
int unit_add_cgroup(Unit *u, CGroupBonding *b);
int unit_add_cgroup_from_text(Unit *u, const char *name);
int unit_add_default_cgroup(Unit *u);
CGroupBonding* unit_get_default_cgroup(Unit *u);
int unit_choose_id(Unit *u, const char *name);
int unit_set_description(Unit *u, const char *description);

2
util.c
View File

@ -585,7 +585,7 @@ int reset_all_signal_handlers(void) {
return -errno;
}
return 0;
return 0;
}
char *strstrip(char *s) {