sd-bus: add support for policy upload on activator connections

[elogind.git] / src / libsystemd / sd-bus / bus-kernel.c

diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 0b5bae32d5fac4b88bcfbe37d8a0402579d5cec6..2a1b0b424a9dba2a7fd96ca2f13083984473b16c 100644 (file)
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -140,7 +140,7 @@ static int bus_message_setup_bloom(sd_bus_message *m, struct kdbus_bloom_filter
         assert(bloom);
 
         data = bloom->data;
-        memset(data, 0, m->bus->bloom_size);
+        memzero(data, m->bus->bloom_size);
         bloom->generation = 0;
 
         bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "message-type", bus_message_type_to_string(m->header->type));
@@ -256,7 +256,7 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
         }
 
         m->free_kdbus = true;
-        memset(m->kdbus, 0, sz);
+        memzero(m->kdbus, sz);
 
         m->kdbus->flags =
                 ((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_FLAGS_EXPECT_REPLY) |
@@ -299,8 +299,8 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
                         continue;
                 }
 
-                /* Otherwise let's send a vector to the actual data,
-                 * for that we need to map it first. */
+                /* Otherwise, let's send a vector to the actual data.
+                 * For that, we need to map it first. */
                 r = bus_body_part_map(part);
                 if (r < 0)
                         goto fail;
@@ -920,10 +920,10 @@ static int push_name_owner_changed(sd_bus *bus, const char *name, const char *ol
 
         r = sd_bus_message_new_signal(
                         bus,
+                        &m,
                         "/org/freedesktop/DBus",
                         "org.freedesktop.DBus",
-                        "NameOwnerChanged",
-                        &m);
+                        "NameOwnerChanged");
         if (r < 0)
                 return r;
 
@@ -1309,7 +1309,7 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         n->type = KDBUS_ITEM_MAKE_NAME;
         make->size += ALIGN8(n->size);
 
-        make->flags = KDBUS_MAKE_POLICY_OPEN | (world ? KDBUS_MAKE_ACCESS_WORLD : 0);
+        make->flags = world ? KDBUS_MAKE_ACCESS_WORLD : 0;
 
         if (ioctl(fd, KDBUS_CMD_BUS_MAKE, make) < 0) {
                 close_nointr_nofail(fd);
@@ -1338,9 +1338,51 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         return fd;
 }
 
-int bus_kernel_create_starter(const char *bus, const char *name) {
+static void bus_kernel_translate_policy(const BusNamePolicy *policy, struct kdbus_item *item)
+{
+        switch (policy->type) {
+        case BUSNAME_POLICY_TYPE_USER:
+                item->policy_access.type = KDBUS_POLICY_ACCESS_USER;
+                item->policy_access.id = policy->uid;
+                break;
+
+        case BUSNAME_POLICY_TYPE_GROUP:
+                item->policy_access.type = KDBUS_POLICY_ACCESS_GROUP;
+                item->policy_access.id = policy->gid;
+                break;
+
+        case BUSNAME_POLICY_TYPE_WORLD:
+                item->policy_access.type = KDBUS_POLICY_ACCESS_WORLD;
+                break;
+
+        default:
+                assert_not_reached("Unknown policy type");
+        }
+
+        switch (policy->access) {
+        case BUSNAME_POLICY_ACCESS_SEE:
+                item->policy_access.access = KDBUS_POLICY_SEE;
+                break;
+
+        case BUSNAME_POLICY_ACCESS_TALK:
+                item->policy_access.access = KDBUS_POLICY_TALK;
+                break;
+
+        case BUSNAME_POLICY_ACCESS_OWN:
+                item->policy_access.access = KDBUS_POLICY_OWN;
+                break;
+
+        default:
+                assert_not_reached("Unknown policy access");
+        }
+}
+
+int bus_kernel_create_starter(const char *bus, const char *name, BusNamePolicy *policy) {
         struct kdbus_cmd_hello *hello;
         struct kdbus_item *n;
+        size_t policy_cnt = 0;
+        BusNamePolicy *po;
+        size_t size;
         char *p;
         int fd;
 
@@ -1354,16 +1396,29 @@ int bus_kernel_create_starter(const char *bus, const char *name) {
         if (fd < 0)
                 return -errno;
 
-        hello = alloca0(ALIGN8(offsetof(struct kdbus_cmd_hello, items) +
-                               offsetof(struct kdbus_item, str) +
-                               strlen(name) + 1));
+        LIST_FOREACH(policy, po, policy)
+                policy_cnt++;
+
+        size = ALIGN8(offsetof(struct kdbus_cmd_hello, items)) +
+               ALIGN8(offsetof(struct kdbus_item, str) + strlen(name) + 1) +
+               policy_cnt * ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access));
+
+        hello = alloca0(size);
 
         n = hello->items;
         strcpy(n->str, name);
         n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
         n->type = KDBUS_ITEM_NAME;
+        n = KDBUS_ITEM_NEXT(n);
+
+        LIST_FOREACH(policy, po, policy) {
+                n->type = KDBUS_ITEM_POLICY_ACCESS;
+                n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access);
+                bus_kernel_translate_policy(po, n);
+                n = KDBUS_ITEM_NEXT(n);
+        }
 
-        hello->size = ALIGN8(offsetof(struct kdbus_cmd_hello, items) + n->size);
+        hello->size = size;
         hello->conn_flags = KDBUS_HELLO_ACTIVATOR;
         hello->pool_size = KDBUS_POOL_SIZE;
 
@@ -1388,7 +1443,7 @@ int bus_kernel_create_starter(const char *bus, const char *name) {
         return fd;
 }
 
-int bus_kernel_create_namespace(const char *name, char **s) {
+int bus_kernel_create_domain(const char *name, char **s) {
         struct kdbus_cmd_make *make;
         struct kdbus_item *n;
         int fd;
@@ -1410,9 +1465,9 @@ int bus_kernel_create_namespace(const char *name, char **s) {
         n->type = KDBUS_ITEM_MAKE_NAME;
 
         make->size = ALIGN8(offsetof(struct kdbus_cmd_make, items) + n->size);
-        make->flags = KDBUS_MAKE_POLICY_OPEN | KDBUS_MAKE_ACCESS_WORLD;
+        make->flags = KDBUS_MAKE_ACCESS_WORLD;
 
-        if (ioctl(fd, KDBUS_CMD_NS_MAKE, make) < 0) {
+        if (ioctl(fd, KDBUS_CMD_DOMAIN_MAKE, make) < 0) {
                 close_nointr_nofail(fd);
                 return -errno;
         }
@@ -1427,7 +1482,7 @@ int bus_kernel_create_namespace(const char *name, char **s) {
         if (s) {
                 char *p;
 
-                p = strappend("/dev/kdbus/ns/", name);
+                p = strappend("/dev/kdbus/domain/", name);
                 if (!p) {
                         close_nointr_nofail(fd);
                         return -ENOMEM;