sd-bus: sync kdbus.h (API+ABI break)

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

diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index 846307d6647d1f23d94804efba66b5f067103d96..50b662f85d22c0bf1ea69dffac14491f979dadc3 100644 (file)
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -59,11 +59,14 @@ static int bus_request_name_kernel(sd_bus *bus, const char *name, uint64_t flags
         assert(name);
 
         l = strlen(name);
-        size = offsetof(struct kdbus_cmd_name, name) + l + 1;
-        n = alloca0(size);
+        size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l + 1);
+        n = alloca0_align(size, 8);
         n->size = size;
         kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags);
-        memcpy(n->name, name, l+1);
+
+        n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l + 1;
+        n->items[0].type = KDBUS_ITEM_NAME;
+        memcpy(n->items[0].str, name, l+1);
 
 #ifdef HAVE_VALGRIND_MEMCHECK_H
         VALGRIND_MAKE_MEM_DEFINED(n, n->size);
@@ -128,12 +131,14 @@ _public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags)
         assert_return(bus, -EINVAL);
         assert_return(name, -EINVAL);
         assert_return(bus->bus_client, -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
         assert_return(!bus_pid_changed(bus), -ECHILD);
         assert_return(!(flags & ~(SD_BUS_NAME_ALLOW_REPLACEMENT|SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_QUEUE)), -EINVAL);
         assert_return(service_name_is_valid(name), -EINVAL);
         assert_return(name[0] != ':', -EINVAL);
 
+        if (!BUS_IS_OPEN(bus->state))
+                return -ENOTCONN;
+
         if (bus->is_kernel)
                 return bus_request_name_kernel(bus, name, flags);
         else
@@ -142,16 +147,20 @@ _public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags)
 
 static int bus_release_name_kernel(sd_bus *bus, const char *name) {
         struct kdbus_cmd_name *n;
-        size_t l;
+        size_t size, l;
         int r;
 
         assert(bus);
         assert(name);
 
         l = strlen(name);
-        n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1);
-        n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
-        memcpy(n->name, name, l+1);
+        size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l + 1);
+        n = alloca0_align(size, 8);
+        n->size = size;
+
+        n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l + 1;
+        n->items[0].type = KDBUS_ITEM_NAME;
+        memcpy(n->items[0].str, name, l+1);
 
 #ifdef HAVE_VALGRIND_MEMCHECK_H
         VALGRIND_MAKE_MEM_DEFINED(n, n->size);
@@ -201,11 +210,13 @@ _public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
         assert_return(bus, -EINVAL);
         assert_return(name, -EINVAL);
         assert_return(bus->bus_client, -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
         assert_return(!bus_pid_changed(bus), -ECHILD);
         assert_return(service_name_is_valid(name), -EINVAL);
         assert_return(name[0] != ':', -EINVAL);
 
+        if (!BUS_IS_OPEN(bus->state))
+                return -ENOTCONN;
+
         if (bus->is_kernel)
                 return bus_release_name_kernel(bus, name);
         else
@@ -231,23 +242,28 @@ static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
 
         KDBUS_ITEM_FOREACH(name, name_list, names) {
 
+                struct kdbus_item *item;
+                const char *entry_name = NULL;
+
                 if ((flags & KDBUS_NAME_LIST_UNIQUE) && name->owner_id != previous_id) {
                         char *n;
 
                         if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0)
                                 return -ENOMEM;
 
-                        r = strv_push(x, n);
-                        if (r < 0) {
-                                free(n);
-                                return -ENOMEM;
-                        }
+                        r = strv_consume(x, n);
+                        if (r < 0)
+                                return r;
 
                         previous_id = name->owner_id;
                 }
 
-                if (name->size > sizeof(*name) && service_name_is_valid(name->name)) {
-                        r = strv_extend(x, name->name);
+                KDBUS_ITEM_FOREACH(item, name, items)
+                        if (item->type == KDBUS_ITEM_NAME)
+                                entry_name = item->str;
+
+                if (entry_name && service_name_is_valid(entry_name)) {
+                        r = strv_extend(x, entry_name);
                         if (r < 0)
                                 return -ENOMEM;
                 }
@@ -344,9 +360,11 @@ static int bus_list_names_dbus1(sd_bus *bus, char ***acquired, char ***activatab
 _public_ int sd_bus_list_names(sd_bus *bus, char ***acquired, char ***activatable) {
         assert_return(bus, -EINVAL);
         assert_return(acquired || activatable, -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
         assert_return(!bus_pid_changed(bus), -ECHILD);
 
+        if (!BUS_IS_OPEN(bus->state))
+                return -ENOTCONN;
+
         if (bus->is_kernel)
                 return bus_list_names_kernel(bus, acquired, activatable);
         else
@@ -372,11 +390,11 @@ static int bus_get_owner_kdbus(
                 return r;
         if (r > 0) {
                 size = offsetof(struct kdbus_cmd_conn_info, name);
-                cmd = alloca0(size);
+                cmd = alloca0_align(size, 8);
                 cmd->id = id;
         } else {
                 size = offsetof(struct kdbus_cmd_conn_info, name) + strlen(name) + 1;
-                cmd = alloca0(size);
+                cmd = alloca0_align(size, 8);
                 strcpy(cmd->name, name);
         }
 
@@ -391,7 +409,7 @@ static int bus_get_owner_kdbus(
 
         /* Non-activated names are considered not available */
         if (conn_info->flags & KDBUS_HELLO_ACTIVATOR)
-                return name[0] == ':' ? -ENXIO : -ENOENT;
+                return name[0] == ':' ? -ENXIO : -ESRCH;
 
         c = bus_creds_new();
         if (!c)
@@ -491,11 +509,9 @@ static int bus_get_owner_kdbus(
                                         goto fail;
                                 }
 
-                                if (!bus->cgroup_root) {
-                                        r = cg_get_root_path(&bus->cgroup_root);
-                                        if (r < 0)
-                                                goto fail;
-                                }
+                                r = bus_get_root_path(bus);
+                                if (r < 0)
+                                        goto fail;
 
                                 c->cgroup_root = strdup(bus->cgroup_root);
                                 if (!c->cgroup_root) {
@@ -687,8 +703,8 @@ static int bus_get_owner_dbus1(
                 }
 
                 if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
-                        const void *p;
-                        size_t sz;
+                        const void *p = NULL;
+                        size_t sz = 0;
 
                         r = sd_bus_call_method(
                                         bus,
@@ -737,11 +753,13 @@ _public_ int sd_bus_get_owner(
         assert_return(name, -EINVAL);
         assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP);
         assert_return(mask == 0 || creds, -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
         assert_return(!bus_pid_changed(bus), -ECHILD);
         assert_return(service_name_is_valid(name), -EINVAL);
         assert_return(bus->bus_client, -ENODATA);
 
+        if (!BUS_IS_OPEN(bus->state))
+                return -ENOTCONN;
+
         if (bus->is_kernel)
                 return bus_get_owner_kdbus(bus, name, mask, creds);
         else
@@ -823,7 +841,7 @@ static int add_name_change_match(sd_bus *bus,
                             offsetof(struct kdbus_notify_name_change, name) +
                             l);
 
-                m = alloca0(sz);
+                m = alloca0_align(sz, 8);
                 m->size = sz;
                 m->cookie = cookie;
 
@@ -883,7 +901,7 @@ static int add_name_change_match(sd_bus *bus,
                             offsetof(struct kdbus_item, id_change) +
                             sizeof(struct kdbus_notify_id_change));
 
-                m = alloca0(sz);
+                m = alloca0_align(sz, 8);
                 m->size = sz;
                 m->cookie = cookie;
 
@@ -919,7 +937,6 @@ static int add_name_change_match(sd_bus *bus,
 
 int bus_add_match_internal_kernel(
                 sd_bus *bus,
-                uint64_t id,
                 struct bus_match_component *components,
                 unsigned n_components,
                 uint64_t cookie) {
@@ -1054,10 +1071,9 @@ int bus_add_match_internal_kernel(
         if (using_bloom)
                 sz += ALIGN8(offsetof(struct kdbus_item, data64) + bus->bloom_size);
 
-        m = alloca0(sz);
+        m = alloca0_align(sz, 8);
         m->size = sz;
         m->cookie = cookie;
-        m->owner_id = id;
 
         item = m->items;
 
@@ -1100,13 +1116,22 @@ int bus_add_match_internal_kernel(
         return 0;
 }
 
+#define internal_match(bus, m)                                          \
+        ((bus)->hello_flags & KDBUS_HELLO_MONITOR                       \
+         ? (isempty(m) ? "eavesdrop='true'" : strappenda((m), ",eavesdrop='true'")) \
+         : (m))
+
 static int bus_add_match_internal_dbus1(
                 sd_bus *bus,
                 const char *match) {
 
+        const char *e;
+
         assert(bus);
         assert(match);
 
+        e = internal_match(bus, match);
+
         return sd_bus_call_method(
                         bus,
                         "org.freedesktop.DBus",
@@ -1116,7 +1141,7 @@ static int bus_add_match_internal_dbus1(
                         NULL,
                         NULL,
                         "s",
-                        match);
+                        e);
 }
 
 int bus_add_match_internal(
@@ -1127,17 +1152,15 @@ int bus_add_match_internal(
                 uint64_t cookie) {
 
         assert(bus);
-        assert(match);
 
         if (bus->is_kernel)
-                return bus_add_match_internal_kernel(bus, 0, components, n_components, cookie);
+                return bus_add_match_internal_kernel(bus, components, n_components, cookie);
         else
                 return bus_add_match_internal_dbus1(bus, match);
 }
 
 int bus_remove_match_internal_kernel(
                 sd_bus *bus,
-                uint64_t id,
                 uint64_t cookie) {
 
         struct kdbus_cmd_match m;
@@ -1148,7 +1171,6 @@ int bus_remove_match_internal_kernel(
         zero(m);
         m.size = offsetof(struct kdbus_cmd_match, items);
         m.cookie = cookie;
-        m.owner_id = id;
 
         r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_REMOVE, &m);
         if (r < 0)
@@ -1161,9 +1183,13 @@ static int bus_remove_match_internal_dbus1(
                 sd_bus *bus,
                 const char *match) {
 
+        const char *e;
+
         assert(bus);
         assert(match);
 
+        e = internal_match(bus, match);
+
         return sd_bus_call_method(
                         bus,
                         "org.freedesktop.DBus",
@@ -1173,7 +1199,7 @@ static int bus_remove_match_internal_dbus1(
                         NULL,
                         NULL,
                         "s",
-                        match);
+                        e);
 }
 
 int bus_remove_match_internal(
@@ -1182,10 +1208,9 @@ int bus_remove_match_internal(
                 uint64_t cookie) {
 
         assert(bus);
-        assert(match);
 
         if (bus->is_kernel)
-                return bus_remove_match_internal_kernel(bus, 0, cookie);
+                return bus_remove_match_internal_kernel(bus, cookie);
         else
                 return bus_remove_match_internal_dbus1(bus, match);
 }
@@ -1198,19 +1223,22 @@ _public_ int sd_bus_get_owner_machine_id(sd_bus *bus, const char *name, sd_id128
         assert_return(bus, -EINVAL);
         assert_return(name, -EINVAL);
         assert_return(machine, -EINVAL);
-        assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN);
         assert_return(!bus_pid_changed(bus), -ECHILD);
         assert_return(service_name_is_valid(name), -EINVAL);
 
+        if (!BUS_IS_OPEN(bus->state))
+                return -ENOTCONN;
+
         if (streq_ptr(name, bus->unique_name))
                 return sd_id128_get_machine(machine);
 
         r = sd_bus_message_new_method_call(
                         bus,
+                        &m,
                         name,
                         "/",
                         "org.freedesktop.DBus.Peer",
-                        "GetMachineId", &m);
+                        "GetMachineId");
         if (r < 0)
                 return r;