chiark / gitweb /
core: add transient units
[elogind.git] / src / core / mount.c
index 7a1b411..3cc3e65 100644 (file)
@@ -25,6 +25,7 @@
 #include <sys/epoll.h>
 #include <signal.h>
 
+#include "manager.h"
 #include "unit.h"
 #include "mount.h"
 #include "load-fragment.h"
@@ -81,6 +82,7 @@ static void mount_init(Unit *u) {
         }
 
         kill_context_init(&m->kill_context);
+        cgroup_context_init(&m->cgroup_context);
 
         /* We need to make sure that /bin/mount is always called in
          * the same process group as us, so that the autofs kernel
@@ -126,7 +128,8 @@ static void mount_done(Unit *u) {
         mount_parameters_done(&m->parameters_proc_self_mountinfo);
         mount_parameters_done(&m->parameters_fragment);
 
-        exec_context_done(&m->exec_context);
+        cgroup_context_done(&m->cgroup_context);
+        exec_context_done(&m->exec_context, manager_is_reloading_or_reexecuting(u->manager));
         exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
         m->control_command = NULL;
 
@@ -135,7 +138,7 @@ static void mount_done(Unit *u) {
         unit_unwatch_timer(u, &m->timer_watch);
 }
 
-static MountParameters* get_mount_parameters_fragment(Mount *m) {
+_pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) {
         assert(m);
 
         if (m->from_fragment)
@@ -144,7 +147,7 @@ static MountParameters* get_mount_parameters_fragment(Mount *m) {
         return NULL;
 }
 
-static MountParameters* get_mount_parameters(Mount *m) {
+_pure_ static MountParameters* get_mount_parameters(Mount *m) {
         assert(m);
 
         if (m->from_proc_self_mountinfo)
@@ -292,7 +295,7 @@ static int mount_add_requires_mounts_links(Mount *m) {
 }
 
 static char* mount_test_option(const char *haystack, const char *needle) {
-        struct mntent me;
+        struct mntent me = { .mnt_opts = (char*) haystack };
 
         assert(needle);
 
@@ -302,9 +305,6 @@ static char* mount_test_option(const char *haystack, const char *needle) {
         if (!haystack)
                 return NULL;
 
-        zero(me);
-        me.mnt_opts = (char*) haystack;
-
         return hasmntopt(&me, needle);
 }
 
@@ -438,9 +438,9 @@ static int mount_add_quota_links(Mount *m) {
 }
 
 static int mount_add_default_dependencies(Mount *m) {
-        int r;
+        const char *after, *after2, *online;
         MountParameters *p;
-        const char *after;
+        int r;
 
         assert(m);
 
@@ -455,15 +455,32 @@ static int mount_add_default_dependencies(Mount *m) {
         if (path_equal(m->where, "/"))
                 return 0;
 
-        if (mount_is_network(p))
+        if (mount_is_network(p)) {
                 after = SPECIAL_REMOTE_FS_PRE_TARGET;
-        else
+                after2 = SPECIAL_NETWORK_TARGET;
+                online = SPECIAL_NETWORK_ONLINE_TARGET;
+        } else {
                 after = SPECIAL_LOCAL_FS_PRE_TARGET;
+                after2 = NULL;
+                online = NULL;
+        }
 
-        r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, after, NULL, true);
+        r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true);
         if (r < 0)
                 return r;
 
+        if (after2) {
+                r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true);
+                if (r < 0)
+                        return r;
+        }
+
+        if (online) {
+                r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true);
+                if (r < 0)
+                        return r;
+        }
+
         r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
         if (r < 0)
                 return r;
@@ -502,7 +519,7 @@ static int mount_fix_timeouts(Mount *m) {
         if (!t)
                 return -ENOMEM;
 
-        r = parse_usec(t, &u);
+        r = parse_sec(t, &u);
         free(t);
 
         if (r < 0) {
@@ -632,7 +649,7 @@ static int mount_add_extras(Mount *m) {
                         return r;
         }
 
-        r = unit_add_default_cgroups(u);
+        r = unit_add_default_slice(u);
         if (r < 0)
                 return r;
 
@@ -829,28 +846,31 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
         assert(c);
         assert(_pid);
 
+        unit_realize_cgroup(UNIT(m));
+
         r = unit_watch_timer(UNIT(m), CLOCK_MONOTONIC, true, m->timeout_usec, &m->timer_watch);
         if (r < 0)
                 goto fail;
 
-        if ((r = exec_spawn(c,
-                            NULL,
-                            &m->exec_context,
-                            NULL, 0,
-                            UNIT(m)->manager->environment,
-                            true,
-                            true,
-                            true,
-                            UNIT(m)->manager->confirm_spawn,
-                            UNIT(m)->cgroup_bondings,
-                            UNIT(m)->cgroup_attributes,
-                            NULL,
-                            UNIT(m)->id,
-                            NULL,
-                            &pid)) < 0)
+        r = exec_spawn(c,
+                       NULL,
+                       &m->exec_context,
+                       NULL, 0,
+                       UNIT(m)->manager->environment,
+                       true,
+                       true,
+                       true,
+                       UNIT(m)->manager->confirm_spawn,
+                       UNIT(m)->cgroup_mask,
+                       UNIT(m)->cgroup_path,
+                       UNIT(m)->id,
+                       NULL,
+                       &pid);
+        if (r < 0)
                 goto fail;
 
-        if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
+        r = unit_watch_pid(UNIT(m), pid);
+        if (r < 0)
                 /* FIXME: we need to do something here */
                 goto fail;
 
@@ -870,6 +890,7 @@ static void mount_enter_dead(Mount *m, MountResult f) {
         if (f != MOUNT_SUCCESS)
                 m->result = f;
 
+        exec_context_tmp_dirs_done(&m->exec_context);
         mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
 }
 
@@ -1163,6 +1184,8 @@ static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
         if (m->control_command_id >= 0)
                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
 
+        exec_context_serialize(&m->exec_context, UNIT(m), f);
+
         return 0;
 }
 
@@ -1219,7 +1242,22 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F
                         m->control_command_id = id;
                         m->control_command = m->exec_command + id;
                 }
+        } else if (streq(key, "tmp-dir")) {
+                char *t;
 
+                t = strdup(value);
+                if (!t)
+                        return log_oom();
+
+                m->exec_context.tmp_dir = t;
+        } else if (streq(key, "var-tmp-dir")) {
+                char *t;
+
+                t = strdup(value);
+                if (!t)
+                        return log_oom();
+
+                m->exec_context.var_tmp_dir = t;
         } else
                 log_debug_unit(UNIT(m)->id,
                                "Unknown serialization key '%s'", key);
@@ -1227,19 +1265,19 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F
         return 0;
 }
 
-static UnitActiveState mount_active_state(Unit *u) {
+_pure_ static UnitActiveState mount_active_state(Unit *u) {
         assert(u);
 
         return state_translation_table[MOUNT(u)->state];
 }
 
-static const char *mount_sub_state_to_string(Unit *u) {
+_pure_ static const char *mount_sub_state_to_string(Unit *u) {
         assert(u);
 
         return mount_state_to_string(MOUNT(u)->state);
 }
 
-static bool mount_check_gc(Unit *u) {
+_pure_ static bool mount_check_gc(Unit *u) {
         Mount *m = MOUNT(u);
 
         assert(m);
@@ -1505,9 +1543,11 @@ static int mount_add_one(
                 if (r < 0)
                         goto fail;
 
-                r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
-                if (r < 0)
-                        goto fail;
+                if (!path_equal(where, "/")) {
+                        r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
+                        if (r < 0)
+                                goto fail;
+                }
 
                 unit_add_to_load_queue(u);
         } else {
@@ -1522,7 +1562,7 @@ static int mount_add_one(
                         }
                 }
 
-                if (u->load_state == UNIT_ERROR) {
+                if (u->load_state == UNIT_NOT_FOUND) {
                         u->load_state = UNIT_LOADED;
                         u->load_error = 0;
 
@@ -1670,25 +1710,27 @@ static void mount_shutdown(Manager *m) {
 
 static int mount_enumerate(Manager *m) {
         int r;
-        struct epoll_event ev;
         assert(m);
 
         if (!m->proc_self_mountinfo) {
-                if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
+                struct epoll_event ev = {
+                        .events = EPOLLPRI,
+                        .data.ptr = &m->mount_watch,
+                };
+
+                m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
+                if (!m->proc_self_mountinfo)
                         return -errno;
 
                 m->mount_watch.type = WATCH_MOUNT;
                 m->mount_watch.fd = fileno(m->proc_self_mountinfo);
 
-                zero(ev);
-                ev.events = EPOLLPRI;
-                ev.data.ptr = &m->mount_watch;
-
                 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
                         return -errno;
         }
 
-        if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
+        r = mount_load_proc_self_mountinfo(m, false);
+        if (r < 0)
                 goto fail;
 
         return 0;
@@ -1837,8 +1879,9 @@ const UnitVTable mount_vtable = {
                 "Mount\0"
                 "Install\0",
 
+        .private_section = "Mount",
         .exec_context_offset = offsetof(Mount, exec_context),
-        .exec_section = "Mount",
+        .cgroup_context_offset = offsetof(Mount, cgroup_context),
 
         .no_alias = true,
         .no_instances = true,
@@ -1873,6 +1916,8 @@ const UnitVTable mount_vtable = {
         .bus_interface = "org.freedesktop.systemd1.Mount",
         .bus_message_handler = bus_mount_message_handler,
         .bus_invalidating_properties =  bus_mount_invalidating_properties,
+        .bus_set_property = bus_mount_set_property,
+        .bus_commit_properties = bus_mount_commit_properties,
 
         .enumerate = mount_enumerate,
         .shutdown = mount_shutdown,