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authorLennart Poettering <lennart@poettering.net>2013-11-19 21:12:59 +0100
committerLennart Poettering <lennart@poettering.net>2013-11-20 20:52:36 +0100
commit718db96199eb307751264e4163555662c9a389fa (patch)
tree9ec8467596ba1acba76bb6273c7797baf68c1a00 /src/core/path.c
parent3febea3a0b0a968ea281e7959c1654cbaf95c9bf (diff)
core: convert PID 1 to libsystemd-bus
This patch converts PID 1 to libsystemd-bus and thus drops the dependency on libdbus. The only remaining code using libdbus is a test case that validates our bus marshalling against libdbus' marshalling, and this dependency can be turned off. This patch also adds a couple of things to libsystem-bus, that are necessary to make the port work: - Synthesizing of "Disconnected" messages when bus connections are severed. - Support for attaching multiple vtables for the same interface on the same path. This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus calls which used an inappropriate signature. As a side effect we will now generate PropertiesChanged messages which carry property contents, rather than just invalidation information.
Diffstat (limited to 'src/core/path.c')
-rw-r--r--src/core/path.c71
1 files changed, 38 insertions, 33 deletions
diff --git a/src/core/path.c b/src/core/path.c
index 10df80f695..51e8d1dbcc 100644
--- a/src/core/path.c
+++ b/src/core/path.c
@@ -31,9 +31,10 @@
#include "mkdir.h"
#include "dbus-path.h"
#include "special.h"
-#include "dbus-common.h"
#include "path-util.h"
#include "macro.h"
+#include "bus-util.h"
+#include "bus-error.h"
static const UnitActiveState state_translation_table[_PATH_STATE_MAX] = {
[PATH_DEAD] = UNIT_INACTIVE,
@@ -42,7 +43,9 @@ static const UnitActiveState state_translation_table[_PATH_STATE_MAX] = {
[PATH_FAILED] = UNIT_FAILED
};
-int path_spec_watch(PathSpec *s, Unit *u) {
+static int path_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
+
+int path_spec_watch(PathSpec *s, sd_event_io_handler_t handler) {
static const int flags_table[_PATH_TYPE_MAX] = {
[PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
@@ -56,10 +59,11 @@ int path_spec_watch(PathSpec *s, Unit *u) {
char *slash, *oldslash = NULL;
int r;
- assert(u);
assert(s);
+ assert(s->unit);
+ assert(handler);
- path_spec_unwatch(s, u);
+ path_spec_unwatch(s);
s->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
if (s->inotify_fd < 0) {
@@ -67,7 +71,7 @@ int path_spec_watch(PathSpec *s, Unit *u) {
goto fail;
}
- r = unit_watch_fd(u, s->inotify_fd, EPOLLIN, &s->watch);
+ r = sd_event_add_io(s->unit->manager->event, s->inotify_fd, EPOLLIN, handler, s, &s->event_source);
if (r < 0)
goto fail;
@@ -140,29 +144,29 @@ int path_spec_watch(PathSpec *s, Unit *u) {
return 0;
fail:
- path_spec_unwatch(s, u);
+ path_spec_unwatch(s);
return r;
}
-void path_spec_unwatch(PathSpec *s, Unit *u) {
-
- if (s->inotify_fd < 0)
- return;
+void path_spec_unwatch(PathSpec *s) {
+ assert(s);
- unit_unwatch_fd(u, &s->watch);
+ s->event_source = sd_event_source_unref(s->event_source);
- close_nointr_nofail(s->inotify_fd);
- s->inotify_fd = -1;
+ if (s->inotify_fd >= 0) {
+ close_nointr_nofail(s->inotify_fd);
+ s->inotify_fd = -1;
+ }
}
-int path_spec_fd_event(PathSpec *s, uint32_t events) {
+int path_spec_fd_event(PathSpec *s, uint32_t revents) {
_cleanup_free_ uint8_t *buf = NULL;
struct inotify_event *e;
ssize_t k;
int l;
int r = 0;
- if (events != EPOLLIN) {
+ if (revents != EPOLLIN) {
log_error("Got invalid poll event on inotify.");
return -EINVAL;
}
@@ -282,7 +286,7 @@ void path_free_specs(Path *p) {
assert(p);
while ((s = p->specs)) {
- path_spec_unwatch(s, UNIT(p));
+ path_spec_unwatch(s);
LIST_REMOVE(spec, p->specs, s);
path_spec_done(s);
free(s);
@@ -419,7 +423,7 @@ static void path_unwatch(Path *p) {
assert(p);
LIST_FOREACH(spec, s, p->specs)
- path_spec_unwatch(s, UNIT(p));
+ path_spec_unwatch(s);
}
static int path_watch(Path *p) {
@@ -429,7 +433,7 @@ static int path_watch(Path *p) {
assert(p);
LIST_FOREACH(spec, s, p->specs) {
- r = path_spec_watch(s, UNIT(p));
+ r = path_spec_watch(s, path_dispatch_io);
if (r < 0)
return r;
}
@@ -487,13 +491,11 @@ static void path_enter_dead(Path *p, PathResult f) {
}
static void path_enter_running(Path *p) {
- _cleanup_dbus_error_free_ DBusError error;
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(p);
- dbus_error_init(&error);
-
/* Don't start job if we are supposed to go down */
if (unit_stop_pending(UNIT(p)))
return;
@@ -514,7 +516,7 @@ static void path_enter_running(Path *p) {
fail:
log_warning("%s failed to queue unit startup job: %s",
- UNIT(p)->id, bus_error(&error, r));
+ UNIT(p)->id, bus_error_message(&error, r));
path_enter_dead(p, PATH_FAILURE_RESOURCES);
}
@@ -664,17 +666,20 @@ _pure_ static const char *path_sub_state_to_string(Unit *u) {
return path_state_to_string(PATH(u)->state);
}
-static void path_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
- Path *p = PATH(u);
- PathSpec *s;
+static int path_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
+ PathSpec *s = userdata;
+ Path *p;
int changed;
- assert(p);
+ assert(s);
+ assert(s->unit);
assert(fd >= 0);
+ p = PATH(s->unit);
+
if (p->state != PATH_WAITING &&
p->state != PATH_RUNNING)
- return;
+ return 0;
/* log_debug("inotify wakeup on %s.", u->id); */
@@ -687,7 +692,7 @@ static void path_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
goto fail;
}
- changed = path_spec_fd_event(s, events);
+ changed = path_spec_fd_event(s, revents);
if (changed < 0)
goto fail;
@@ -701,10 +706,11 @@ static void path_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
else
path_enter_waiting(p, false, true);
- return;
+ return 0;
fail:
path_enter_dead(p, PATH_FAILURE_RESOURCES);
+ return 0;
}
static void path_trigger_notify(Unit *u, Unit *other) {
@@ -771,6 +777,7 @@ DEFINE_STRING_TABLE_LOOKUP(path_result, PathResult);
const UnitVTable path_vtable = {
.object_size = sizeof(Path),
+
.sections =
"Unit\0"
"Path\0"
@@ -793,13 +800,11 @@ const UnitVTable path_vtable = {
.active_state = path_active_state,
.sub_state_to_string = path_sub_state_to_string,
- .fd_event = path_fd_event,
-
.trigger_notify = path_trigger_notify,
.reset_failed = path_reset_failed,
.bus_interface = "org.freedesktop.systemd1.Path",
- .bus_message_handler = bus_path_message_handler,
- .bus_invalidating_properties = bus_path_invalidating_properties
+ .bus_vtable = bus_path_vtable,
+ .bus_changing_properties = bus_path_changing_properties
};