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bus: make kdbus work so that we can exchange real messages

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We have ignition, we have tremendous fire!
This commit is contained in:
Lennart Poettering 2013-04-12 01:16:40 +02:00
parent 8e2f9ebf28
commit e9a967f9a0
4 changed files with 24 additions and 6 deletions
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14
src/libsystemd-bus/bus-kernel.c
View File

@ -83,7 +83,9 @@ static int bus_message_setup_kmsg(sd_bus_message *m) {
assert(m);
assert(m->sealed);
assert(!m->kdbus);
if (m->kdbus)
return 0;
if (m->destination) {
r = parse_unique_name(m->destination, &unique);
@ -140,9 +142,11 @@ static int bus_message_setup_kmsg(sd_bus_message *m) {
if (m->body)
append_payload_vec(&d, m->body, m->header->body_size);
m->kdbus->size = (uint8_t*) m - (uint8_t*) m->kdbus;
m->kdbus->size = (uint8_t*) d - (uint8_t*) m->kdbus;
assert(m->kdbus->size <= sz);
m->free_kdbus = true;
return 0;
}
@ -282,14 +286,14 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_mess
continue;
l = d->size - offsetof(struct kdbus_msg_data, data);
if (idx == sizeof(struct bus_header) &&
l == BUS_MESSAGE_FIELDS_SIZE(m))
m->fields = d->data;
else if (idx == sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) &&
l == BUS_MESSAGE_BODY_SIZE(m))
m->body = d->data;
else {
else if (!(idx == 0 && l == sizeof(struct bus_header)) &&
!(idx == sizeof(struct bus_header) + BUS_MESSAGE_FIELDS_SIZE(m))) {
sd_bus_message_unref(m);
return -EBADMSG;
}
@ -339,7 +343,7 @@ int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) {
if (errno == EAGAIN)
return 0;
if (errno != EMSGSIZE)
if (errno != ENOBUFS)
return -errno;
sz *= 2;

1
src/libsystemd-bus/sd-bus.c
View File

@ -55,6 +55,7 @@ static void bus_free(sd_bus *b) {
free(b->unique_name);
free(b->auth_buffer);
free(b->address);
free(b->kernel);
free(b->exec_path);
strv_free(b->exec_argv);

14
src/libsystemd-bus/test-bus-kernel.c
View File

@ -29,7 +29,8 @@
int main(int argc, char *argv[]) {
_cleanup_close_ int bus_ref = -1;
_cleanup_free_ char *bus_name = NULL, *address = NULL;
const char *ua = NULL, *ub = NULL;
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
const char *ua = NULL, *ub = NULL, *the_string = NULL;
sd_bus *a, *b;
int r;
@ -67,6 +68,17 @@ int main(int argc, char *argv[]) {
printf("unique b: %s\n", ub);
r = sd_bus_emit_signal(a, "/foo", "waldo.com", "Piep", "s", "I am a string");
assert_se(r >= 0);
r = sd_bus_process(b, &m);
assert_se(r > 0);
assert_se(m);
r = sd_bus_message_read(m, "s", &the_string);
assert_se(r >= 0);
assert_se(streq(the_string, "I am a string"));
sd_bus_unref(a);
sd_bus_unref(b);

1
src/systemd/sd-bus.h
View File

@ -33,6 +33,7 @@ extern "C" {
#endif
/* TODO:
* - instead of adding in padding iovec when sending simply extend header buffer
* - add page donation logic
* - api for appending/reading fixed arrays
* - merge busctl into systemctl or so?