libsystemd-bus: kernel: add sd_bus_kernel_translate_request_name_flags

Flags used to request a name from kdbus are not identical to what DBus
and sd_bus use internally. Introduce a simple function to do the
translation for us. It's factored out to a separate function so the
dbus-driver instance can make use of it as well.

2 files changed, 20 insertions, 0 deletions

diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c
index 9d4b6cf721..08f1851b96 100644
--- a/src/libsystemd-bus/bus-kernel.c
+++ b/src/libsystemd-bus/bus-kernel.c
@@ -806,3 +806,21 @@ void bus_kernel_flush_memfd(sd_bus *b) {
         for (i = 0; i < b->n_memfd_cache; i++)
                 close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].size);
 }
+
+int sd_bus_kernel_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags) {
+
+        assert_return(kdbus_flags != NULL, -EINVAL);
+
+        *kdbus_flags = 0;
+
+        if (sd_bus_flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
+                *kdbus_flags |= KDBUS_NAME_ALLOW_REPLACEMENT;
+
+        if (sd_bus_flags & SD_BUS_NAME_REPLACE_EXISTING)
+                *kdbus_flags |= KDBUS_NAME_REPLACE_EXISTING;
+
+        if (!(sd_bus_flags & SD_BUS_NAME_DO_NOT_QUEUE))
+                *kdbus_flags |= KDBUS_NAME_QUEUE;
+
+        return 0;
+}
diff --git a/src/libsystemd-bus/bus-kernel.h b/src/libsystemd-bus/bus-kernel.h
index 69df4f4e9e..779a7de2eb 100644
--- a/src/libsystemd-bus/bus-kernel.h
+++ b/src/libsystemd-bus/bus-kernel.h
@@ -68,3 +68,5 @@ void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t size);
 void bus_kernel_flush_memfd(sd_bus *bus);
 
 int bus_kernel_parse_unique_name(const char *s, uint64_t *id);
+
+int sd_bus_kernel_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags);