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turn kdbus support into a runtime option

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./configure --enable/disable-kdbus can be used to set the default
behavior regarding kdbus.

If no kdbus kernel support is available, dbus-dameon will be used.

With --enable-kdbus, the kernel command line option "kdbus=0" can
be used to disable kdbus.

With --disable-kdbus, the kernel command line option "kdbus=1" is
required to enable kdbus support.
This commit is contained in:
Kay Sievers 2015-06-17 16:37:55 +02:00
parent a54941f1b4
commit 1b09f548c7
21 changed files with 22 additions and 98 deletions
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3
Makefile-man.am
View File

@ -1052,7 +1052,6 @@ MANPAGES_ALIAS += \
endif
if ENABLE_KDBUS
MANPAGES += \
man/sd_bus_creds_get_pid.3 \
man/sd_bus_creds_new_from_pid.3 \
@ -1491,8 +1490,6 @@ man/sd_event_unref.html: man/sd_event_new.html
man/systemd-bus-proxyd.socket.html: man/systemd-bus-proxyd@.service.html
$(html-alias)
endif
if ENABLE_LOCALED
MANPAGES += \
man/localectl.1 \

24
Makefile.am
View File

@ -338,10 +338,8 @@ INSTALL_EXEC_HOOKS += \
install-aliases-hook \
install-touch-usr-hook
if ENABLE_KDBUS
INSTALL_EXEC_HOOKS += \
install-busnames-target-wants-hook
endif
# ------------------------------------------------------------------------------
AM_V_M4 = $(AM_V_M4_$(V))
@ -522,10 +520,8 @@ dist_systemunit_DATA = \
units/initrd-switch-root.target \
units/machines.target
if ENABLE_KDBUS
dist_systemunit_DATA += \
$(dist_systemunit_DATA_busnames)
endif
dist_systemunit_DATA_busnames += \
units/busnames.target
@ -2622,7 +2618,6 @@ systemd_gpt_auto_generator_CFLAGS = \
endif
# ------------------------------------------------------------------------------
if ENABLE_KDBUS
systemgenerator_PROGRAMS += \
systemd-dbus1-generator
@ -2645,7 +2640,6 @@ dist_xinitrc_SCRIPTS = \
INSTALL_EXEC_HOOKS += dbus1-generator-install-hook
UNINSTALL_EXEC_HOOKS += dbus1-generator-uninstall-hook
endif
# ------------------------------------------------------------------------------
systemd_sysv_generator_SOURCES = \
@ -2793,7 +2787,6 @@ systemd_stdio_bridge_LDADD = \
libbus-proxy-core.la \
libshared.la
if ENABLE_KDBUS
nodist_systemunit_DATA += \
units/systemd-bus-proxyd.service
@ -2805,7 +2798,6 @@ nodist_userunit_DATA += \
dist_userunit_DATA += \
units/user/systemd-bus-proxyd.socket
endif
EXTRA_DIST += \
units/systemd-bus-proxyd.service.m4.in \
@ -2971,14 +2963,6 @@ pkginclude_HEADERS += \
src/systemd/sd-id128.h \
src/systemd/sd-daemon.h
if ENABLE_KDBUS
pkginclude_HEADERS += \
src/systemd/sd-utf8.h \
src/systemd/sd-netlink.h \
src/systemd/sd-resolve.h \
src/systemd/sd-path.h
endif
lib_LTLIBRARIES += \
libsystemd.la
@ -6174,10 +6158,8 @@ USER_UNIT_ALIASES += \
$(systemunitdir)/sound.target sound.target \
$(systemunitdir)/smartcard.target smartcard.target
if ENABLE_KDBUS
USER_UNIT_ALIASES += \
$(systemunitdir)/busnames.target busnames.target
endif
GENERAL_ALIASES += \
$(systemunitdir)/remote-fs.target $(pkgsysconfdir)/system/multi-user.target.wants/remote-fs.target \
@ -6238,7 +6220,6 @@ DISTCHECK_CONFIGURE_FLAGS = \
--with-pamlibdir=$$dc_install_base/$(pamlibdir) \
--with-pamconfdir=$$dc_install_base/$(pamconfdir) \
--with-rootprefix=$$dc_install_base \
--enable-kdbus \
--enable-compat-libs
if HAVE_SYSV_COMPAT
@ -6299,11 +6280,6 @@ hwdb-update:
http://standards.ieee.org/develop/regauth/iab/iab.txt && \
./ids-update.pl )
.PHONY: kdbus-update
kdbus-update:
( cd $(top_srcdir)/src/libsystemd/sd-bus/ && \
wget -N https://d-bus.googlecode.com/git/kdbus.h )
.PHONY: git-tag
git-tag:
git tag -s "v$(VERSION)" -m "systemd $(VERSION)"

6
configure.ac
View File

@ -1203,9 +1203,9 @@ AM_CONDITIONAL(ENABLE_TERMINAL, [test "x$have_terminal" = "xyes" -a "x$have_unif
# ------------------------------------------------------------------------------
have_kdbus=no
AC_ARG_ENABLE(kdbus, AS_HELP_STRING([--enable-kdbus], [do connect to kdbus by default]))
if test "x$enable_kdbus" = "xyes"; then
AC_DEFINE(ENABLE_KDBUS, 1, [Define if kdbus support is to be enabled])
AC_ARG_ENABLE(kdbus, AS_HELP_STRING([--disable-kdbus], [do not connect to kdbus by default]))
if test "x$enable_kdbus" != "xno"; then
AC_DEFINE(ENABLE_KDBUS, 1, [Define if kdbus is to be connected to by default])
have_kdbus=yes
M4_DEFINES="$M4_DEFINES -DENABLE_KDBUS"
fi

2
man/systemd-bus-proxyd.xml
View File

@ -24,7 +24,7 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd-bus-proxyd" conditional="ENABLE_KDBUS"
<refentry id="systemd-bus-proxyd"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>

2
man/systemd-bus-proxyd@.service.xml
View File

@ -24,7 +24,7 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd-bus-proxyd@.service" conditional='ENABLE_KDBUS'>
<refentry id="systemd-bus-proxyd@.service">
<refentryinfo>
<title>systemd-bus-proxyd@.service</title>

8
src/basic/def.h
View File

@ -63,13 +63,7 @@
#define UNIX_SYSTEM_BUS_ADDRESS "unix:path=/var/run/dbus/system_bus_socket"
#define KERNEL_SYSTEM_BUS_ADDRESS "kernel:path=/sys/fs/kdbus/0-system/bus"
#ifdef ENABLE_KDBUS
# define DEFAULT_SYSTEM_BUS_ADDRESS KERNEL_SYSTEM_BUS_ADDRESS ";" UNIX_SYSTEM_BUS_ADDRESS
#else
# define DEFAULT_SYSTEM_BUS_ADDRESS UNIX_SYSTEM_BUS_ADDRESS
#endif
#define DEFAULT_SYSTEM_BUS_ADDRESS KERNEL_SYSTEM_BUS_ADDRESS ";" UNIX_SYSTEM_BUS_ADDRESS
#define UNIX_USER_BUS_ADDRESS_FMT "unix:path=%s/bus"
#define KERNEL_USER_BUS_ADDRESS_FMT "kernel:path=/sys/fs/kdbus/"UID_FMT"-user/bus"

4
src/bus-proxyd/bus-proxyd.c
View File

@ -239,11 +239,7 @@ static int parse_argv(int argc, char *argv[]) {
if (!e)
return log_oom();
#ifdef ENABLE_KDBUS
a = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
#else
a = strjoin("x-machine-unix:machine=", e, NULL);
#endif
if (!a)
return log_oom();

4
src/bus-proxyd/stdio-bridge.c
View File

@ -110,11 +110,7 @@ static int parse_argv(int argc, char *argv[]) {
if (!e)
return log_oom();
#ifdef ENABLE_KDBUS
a = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
#else
a = strjoin("x-machine-unix:machine=", e, NULL);
#endif
if (!a)
return log_oom();

2
src/core/execute.c
View File

@ -1514,7 +1514,6 @@ static int exec_child(
}
}
#ifdef ENABLE_KDBUS
if (params->bus_endpoint_fd >= 0 && context->bus_endpoint) {
uid_t ep_uid = (uid == UID_INVALID) ? 0 : uid;
@ -1524,7 +1523,6 @@ static int exec_child(
return r;
}
}
#endif
/* If delegation is enabled we'll pass ownership of the cgroup
* (but only in systemd's own controller hierarchy!) to the

2
src/core/kmod-setup.c
View File

@ -66,10 +66,8 @@ int kmod_setup(void) {
/* this should never be a module */
{ "unix", "/proc/net/unix", true, true, NULL },
#ifdef ENABLE_KDBUS
/* IPC is needed before we bring up any other services */
{ "kdbus", "/sys/fs/kdbus", false, false, is_kdbus_wanted },
#endif
#ifdef HAVE_LIBIPTC
/* netfilter is needed by networkd, nspawn among others, and cannot be autoloaded */

4
src/core/load-fragment-gperf.gperf.m4
View File

@ -229,9 +229,7 @@ Service.BusName, config_parse_bus_name, 0,
Service.FileDescriptorStoreMax, config_parse_unsigned, 0, offsetof(Service, n_fd_store_max)
Service.NotifyAccess, config_parse_notify_access, 0, offsetof(Service, notify_access)
Service.Sockets, config_parse_service_sockets, 0, 0
m4_ifdef(`ENABLE_KDBUS',
`Service.BusPolicy, config_parse_bus_endpoint_policy, 0, offsetof(Service, exec_context)',
`Service.BusPolicy, config_parse_warn_compat, DISABLED_EXPERIMENTAL, 0')
Service.BusPolicy, config_parse_bus_endpoint_policy, 0, offsetof(Service, exec_context)
EXEC_CONTEXT_CONFIG_ITEMS(Service)m4_dnl
CGROUP_CONTEXT_CONFIG_ITEMS(Service)m4_dnl
KILL_CONTEXT_CONFIG_ITEMS(Service)m4_dnl

2
src/core/manager.c
View File

@ -731,7 +731,6 @@ static int manager_setup_notify(Manager *m) {
}
static int manager_setup_kdbus(Manager *m) {
#ifdef ENABLE_KDBUS
_cleanup_free_ char *p = NULL;
assert(m);
@ -749,7 +748,6 @@ static int manager_setup_kdbus(Manager *m) {
return log_debug_errno(m->kdbus_fd, "Failed to set up kdbus: %m");
log_debug("Successfully set up kdbus on %s", p);
#endif
return 0;
}

2
src/core/mount-setup.c
View File

@ -104,10 +104,8 @@ static const MountPoint mount_table[] = {
{ "efivarfs", "/sys/firmware/efi/efivars", "efivarfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
is_efi_boot, MNT_NONE },
#endif
#ifdef ENABLE_KDBUS
{ "kdbusfs", "/sys/fs/kdbus", "kdbusfs", NULL, MS_NOSUID|MS_NOEXEC|MS_NODEV,
NULL, MNT_IN_CONTAINER },
#endif
};
/* These are API file systems that might be mounted by other software,

4
src/core/service.c
View File

@ -568,14 +568,12 @@ static int service_add_extras(Service *s) {
s->notify_access = NOTIFY_MAIN;
if (s->bus_name) {
#ifdef ENABLE_KDBUS
const char *n;
n = strjoina(s->bus_name, ".busname");
r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, n, NULL, true);
if (r < 0)
return r;
#endif
r = unit_watch_bus_name(UNIT(s), s->bus_name);
if (r < 0)
@ -1180,7 +1178,6 @@ static int service_spawn(
} else
path = UNIT(s)->cgroup_path;
#ifdef ENABLE_KDBUS
if (s->exec_context.bus_endpoint) {
r = bus_kernel_create_endpoint(UNIT(s)->manager->running_as == MANAGER_SYSTEM ? "system" : "user",
UNIT(s)->id, &bus_endpoint_path);
@ -1192,7 +1189,6 @@ static int service_spawn(
* as the service is running. */
exec_params.bus_endpoint_fd = s->bus_endpoint_fd = r;
}
#endif
exec_params.argv = argv;
exec_params.fds = fds;

15
src/libsystemd/sd-bus/sd-bus.c
View File

@ -1239,18 +1239,9 @@ int bus_set_address_user(sd_bus *b) {
if (!ee)
return -ENOMEM;
#ifdef ENABLE_KDBUS
(void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee);
#else
(void) asprintf(&b->address, UNIX_USER_BUS_ADDRESS_FMT, ee);
#endif
} else {
#ifdef ENABLE_KDBUS
} else
(void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid());
#else
return -ECONNREFUSED;
#endif
}
if (!b->address)
return -ENOMEM;
@ -1372,11 +1363,7 @@ int bus_set_address_system_machine(sd_bus *b, const char *machine) {
if (!e)
return -ENOMEM;
#ifdef ENABLE_KDBUS
b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
#else
b->address = strjoin("x-machine-unix:machine=", e, NULL);
#endif
if (!b->address)
return -ENOMEM;

3
src/login/pam_systemd.c
View File

@ -177,7 +177,6 @@ static int export_legacy_dbus_address(
uid_t uid,
const char *runtime) {
#ifdef ENABLE_KDBUS
_cleanup_free_ char *s = NULL;
int r;
@ -195,7 +194,7 @@ static int export_legacy_dbus_address(
pam_syslog(handle, LOG_ERR, "Failed to set bus variable.");
return r;
}
#endif
return PAM_SUCCESS;
}

4
src/machine/machine-dbus.c
View File

@ -509,11 +509,7 @@ int bus_machine_method_open_login(sd_bus_message *message, void *userdata, sd_bu
if (r < 0)
return r;
#ifdef ENABLE_KDBUS
# define ADDRESS_FMT "x-machine-kernel:pid=%1$" PID_PRI ";x-machine-unix:pid=%1$" PID_PRI
#else
# define ADDRESS_FMT "x-machine-unix:pid=%1$" PID_PRI
#endif
if (asprintf(&address, ADDRESS_FMT, m->leader) < 0)
return log_oom();

23
src/shared/bus-util.c
View File

@ -545,7 +545,6 @@ int bus_open_system_systemd(sd_bus **_bus) {
* directly to the system instance, instead of going via the
* bus */
#ifdef ENABLE_KDBUS
r = sd_bus_new(&bus);
if (r < 0)
return r;
@ -564,7 +563,6 @@ int bus_open_system_systemd(sd_bus **_bus) {
}
bus = sd_bus_unref(bus);
#endif
r = sd_bus_new(&bus);
if (r < 0)
@ -598,7 +596,6 @@ int bus_open_user_systemd(sd_bus **_bus) {
assert(_bus);
#ifdef ENABLE_KDBUS
r = sd_bus_new(&bus);
if (r < 0)
return r;
@ -616,7 +613,6 @@ int bus_open_user_systemd(sd_bus **_bus) {
}
bus = sd_bus_unref(bus);
#endif
e = secure_getenv("XDG_RUNTIME_DIR");
if (!e)
@ -2034,15 +2030,22 @@ int bus_path_decode_unique(const char *path, const char *prefix, char **ret_send
bool is_kdbus_wanted(void) {
_cleanup_free_ char *value = NULL;
#ifdef ENABLE_KDBUS
const bool configured = true;
#else
const bool configured = false;
#endif
int r;
if (get_proc_cmdline_key("kdbus", NULL) <= 0) {
r = get_proc_cmdline_key("kdbus=", &value);
if (r <= 0 || parse_boolean(value) != 1)
return false;
}
if (get_proc_cmdline_key("kdbus", NULL) > 0)
return true;
return true;
r = get_proc_cmdline_key("kdbus=", &value);
if (r <= 0)
return configured;
return parse_boolean(value) == 1;
}
bool is_kdbus_available(void) {

2
sysusers.d/systemd.conf.m4
View File

@ -6,9 +6,7 @@
# (at your option) any later version.
g systemd-journal - -
m4_ifdef(`ENABLE_KDBUS',
u systemd-bus-proxy - "systemd Bus Proxy"
)m4_dnl
m4_ifdef(`ENABLE_NETWORKD',
u systemd-network - "systemd Network Management"
)m4_dnl

2
units/systemd-networkd.service.m4.in
View File

@ -17,13 +17,11 @@ Before=network.target multi-user.target shutdown.target
Conflicts=shutdown.target
Wants=network.target
m4_ifdef(`ENABLE_KDBUS',
# On kdbus systems we pull in the busname explicitly, because it
# carries policy that allows the daemon to acquire its name.
Wants=org.freedesktop.network1.busname
After=org.freedesktop.network1.busname
)m4_dnl
[Service]
Type=notify
Restart=on-failure

2
units/systemd-resolved.service.m4.in
View File

@ -10,13 +10,11 @@ Description=Network Name Resolution
Documentation=man:systemd-resolved.service(8)
After=systemd-networkd.service network.target
m4_ifdef(`ENABLE_KDBUS',
# On kdbus systems we pull in the busname explicitly, because it
# carries policy that allows the daemon to acquire its name.
Wants=org.freedesktop.resolve1.busname
After=org.freedesktop.resolve1.busname
)m4_dnl
[Service]
Type=notify
Restart=always