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path: root/src/libsystemd-bus/sd-bus.c
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Diffstat (limited to 'src/libsystemd-bus/sd-bus.c')
-rw-r--r--src/libsystemd-bus/sd-bus.c81
1 files changed, 38 insertions, 43 deletions
diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index 4a081778ac..08ab202baf 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -43,6 +43,18 @@
static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
+static void bus_close_fds(sd_bus *b) {
+ assert(b);
+
+ if (b->input_fd >= 0)
+ close_nointr_nofail(b->input_fd);
+
+ if (b->output_fd >= 0 && b->output_fd != b->input_fd)
+ close_nointr_nofail(b->output_fd);
+
+ b->input_fd = b->output_fd = -1;
+}
+
static void bus_free(sd_bus *b) {
struct filter_callback *f;
struct object_callback *c;
@@ -50,7 +62,7 @@ static void bus_free(sd_bus *b) {
assert(b);
- sd_bus_close(b);
+ bus_close_fds(b);
free(b->rbuffer);
free(b->unique_name);
@@ -922,12 +934,19 @@ void sd_bus_close(sd_bus *bus) {
if (!bus)
return;
- if (bus->input_fd >= 0)
- close_nointr_nofail(bus->input_fd);
- if (bus->output_fd >= 0 && bus->output_fd != bus->input_fd)
- close_nointr_nofail(bus->output_fd);
+ if (bus->state != BUS_CLOSED)
+ return;
+
+ bus->state = BUS_CLOSED;
- bus->input_fd = bus->output_fd = -1;
+ if (!bus->is_kernel)
+ bus_close_fds(bus);
+
+ /* We'll leave the fd open in case this is a kernel bus, since
+ * there might still be memblocks around that reference this
+ * bus, and they might need to invoke the
+ * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are
+ * freed. */
}
sd_bus *sd_bus_ref(sd_bus *bus) {
@@ -953,7 +972,7 @@ int sd_bus_is_open(sd_bus *bus) {
if (!bus)
return -EINVAL;
- return bus->state != BUS_UNSET && bus->input_fd >= 0;
+ return BUS_IS_OPEN(bus->state);
}
int sd_bus_can_send(sd_bus *bus, char type) {
@@ -961,7 +980,7 @@ int sd_bus_can_send(sd_bus *bus, char type) {
if (!bus)
return -EINVAL;
- if (bus->output_fd < 0)
+ if (bus->state == BUS_UNSET)
return -ENOTCONN;
if (type == SD_BUS_TYPE_UNIX_FD) {
@@ -1012,9 +1031,6 @@ static int dispatch_wqueue(sd_bus *bus) {
assert(bus);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
- if (bus->output_fd < 0)
- return -ENOTCONN;
-
while (bus->wqueue_size > 0) {
if (bus->is_kernel)
@@ -1059,9 +1075,6 @@ static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
assert(m);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
- if (bus->input_fd < 0)
- return -ENOTCONN;
-
if (bus->rqueue_size > 0) {
/* Dispatch a queued message */
@@ -1097,9 +1110,7 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
if (!bus)
return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
- if (bus->output_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (!m)
return -EINVAL;
@@ -1210,9 +1221,7 @@ int sd_bus_send_with_reply(
if (!bus)
return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
- if (bus->output_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (!m)
return -EINVAL;
@@ -1294,11 +1303,8 @@ int bus_ensure_running(sd_bus *bus) {
assert(bus);
- if (bus->input_fd < 0)
- return -ENOTCONN;
- if (bus->state == BUS_UNSET)
+ if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED)
return -ENOTCONN;
-
if (bus->state == BUS_RUNNING)
return 1;
@@ -1331,9 +1337,7 @@ int sd_bus_send_with_reply_and_block(
if (!bus)
return -EINVAL;
- if (bus->output_fd < 0)
- return -ENOTCONN;
- if (bus->state == BUS_UNSET)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (!m)
return -EINVAL;
@@ -1449,7 +1453,7 @@ int sd_bus_send_with_reply_and_block(
int sd_bus_get_fd(sd_bus *bus) {
if (!bus)
return -EINVAL;
- if (bus->input_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (bus->input_fd != bus->output_fd)
return -EPERM;
@@ -1462,9 +1466,7 @@ int sd_bus_get_events(sd_bus *bus) {
if (!bus)
return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
- if (bus->input_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (bus->state == BUS_OPENING)
@@ -1493,9 +1495,7 @@ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
return -EINVAL;
if (!timeout_usec)
return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
- if (bus->input_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (bus->state == BUS_AUTHENTICATING) {
@@ -1992,8 +1992,6 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
if (!bus)
return -EINVAL;
- if (bus->input_fd < 0)
- return -ENOTCONN;
/* We don't allow recursively invoking sd_bus_process(). */
if (bus->processing)
@@ -2002,6 +2000,7 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
switch (bus->state) {
case BUS_UNSET:
+ case BUS_CLOSED:
return -ENOTCONN;
case BUS_OPENING:
@@ -2042,7 +2041,7 @@ static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
assert(bus);
- if (bus->input_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
e = sd_bus_get_events(bus);
@@ -2088,9 +2087,7 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
if (!bus)
return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
- if (bus->input_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
if (bus->rqueue_size > 0)
return 0;
@@ -2103,9 +2100,7 @@ int sd_bus_flush(sd_bus *bus) {
if (!bus)
return -EINVAL;
- if (bus->state == BUS_UNSET)
- return -ENOTCONN;
- if (bus->output_fd < 0)
+ if (!BUS_IS_OPEN(bus->state))
return -ENOTCONN;
r = bus_ensure_running(bus);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-11 10:54:38 +0000