Systemd is causing mislabeled devices to be created and then attempting to read them.

[elogind.git] / src / automount.c

diff --git a/src/automount.c b/src/automount.c
index 84f2d97edae77e8cbb4830674c07929b051ffadb..3a69cf9b4c873b9074a6ecab3351028b4a81455a 100644 (file)
--- a/src/automount.c
+++ b/src/automount.c
@@ -35,12 +35,14 @@
 #include "load-dropin.h"
 #include "unit-name.h"
 #include "dbus-automount.h"
+#include "bus-errors.h"
+#include "special.h"
 
 static const UnitActiveState state_translation_table[_AUTOMOUNT_STATE_MAX] = {
         [AUTOMOUNT_DEAD] = UNIT_INACTIVE,
         [AUTOMOUNT_WAITING] = UNIT_ACTIVE,
         [AUTOMOUNT_RUNNING] = UNIT_ACTIVE,
-        [AUTOMOUNT_MAINTENANCE] = UNIT_INACTIVE_MAINTENANCE
+        [AUTOMOUNT_MAINTENANCE] = UNIT_MAINTENANCE
 };
 
 static int open_dev_autofs(Manager *m);
@@ -53,6 +55,8 @@ static void automount_init(Unit *u) {
 
         a->pipe_watch.fd = a->pipe_fd = -1;
         a->pipe_watch.type = WATCH_INVALID;
+
+        a->directory_mode = 0755;
 }
 
 static void repeat_unmout(const char *path) {
@@ -123,10 +127,7 @@ int automount_add_one_mount_link(Automount *a, Mount *m) {
         if (path_equal(a->where, m->where))
                 return 0;
 
-        if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(a), true)) < 0)
-                return r;
-
-        if ((r = unit_add_dependency(UNIT(a), UNIT_REQUIRES, UNIT(m), true)) < 0)
+        if ((r = unit_add_two_dependencies(UNIT(a), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0)
                 return r;
 
         return 0;
@@ -145,6 +146,23 @@ static int automount_add_mount_links(Automount *a) {
         return 0;
 }
 
+static int automount_add_default_dependencies(Automount *a) {
+        int r;
+
+        assert(a);
+
+        if (a->meta.manager->running_as == MANAGER_SYSTEM) {
+
+                if ((r = unit_add_dependency_by_name(UNIT(a), UNIT_AFTER, SPECIAL_SYSINIT_TARGET, NULL, true)) < 0)
+                        return r;
+
+                if ((r = unit_add_two_dependencies_by_name(UNIT(a), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
 static int automount_verify(Automount *a) {
         bool b;
         char *e;
@@ -153,6 +171,11 @@ static int automount_verify(Automount *a) {
         if (a->meta.load_state != UNIT_LOADED)
                 return 0;
 
+        if (path_equal(a->where, "/")) {
+                log_error("Cannot have an automount unit for the root directory. Refusing.");
+                return -EINVAL;
+        }
+
         if (!(e = unit_name_from_path(a->where, ".automount")))
                 return -ENOMEM;
 
@@ -194,6 +217,10 @@ static int automount_load(Unit *u) {
 
                 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(a->mount), true)) < 0)
                         return r;
+
+                if (a->meta.default_dependencies)
+                        if ((r = automount_add_default_dependencies(a)) < 0)
+                                return r;
         }
 
         return automount_verify(a);
@@ -253,9 +280,11 @@ static void automount_dump(Unit *u, FILE *f, const char *prefix) {
 
         fprintf(f,
                 "%sAutomount State: %s\n"
-                "%sWhere: %s\n",
+                "%sWhere: %s\n"
+                "%sDirectoryMode: %04o\n",
                 prefix, automount_state_to_string(a->state),
-                prefix, a->where);
+                prefix, a->where,
+                prefix, a->directory_mode);
 }
 
 static void automount_enter_dead(Automount *a, bool success) {
@@ -275,6 +304,8 @@ static int open_dev_autofs(Manager *m) {
         if (m->dev_autofs_fd >= 0)
                 return m->dev_autofs_fd;
 
+       label_fix("/dev/autofs");
+
         if ((m->dev_autofs_fd = open("/dev/autofs", O_CLOEXEC|O_RDONLY)) < 0) {
                 log_error("Failed to open /dev/autofs: %s", strerror(errno));
                 return -errno;
@@ -532,21 +563,32 @@ fail:
 static void automount_enter_runnning(Automount *a) {
         int r;
         struct stat st;
+        DBusError error;
 
         assert(a);
         assert(a->mount);
 
-        /* Before we do anything, let's see if somebody is playing games with us? */
+        dbus_error_init(&error);
 
-        if (stat(a->where, &st) < 0) {
+        /* We don't take mount requests anymore if we are supposed to
+         * shut down anyway */
+        if (a->meta.job && a->meta.job->type == JOB_STOP) {
+                automount_send_ready(a, -EHOSTDOWN);
+                return;
+        }
+
+        mkdir_p(a->where, a->directory_mode);
+
+        /* Before we do anything, let's see if somebody is playing games with us? */
+        if (lstat(a->where, &st) < 0) {
                 log_warning("%s failed stat automount point: %m", a->meta.id);
                 goto fail;
         }
 
         if (!S_ISDIR(st.st_mode) || st.st_dev != a->dev_id)
                 log_info("%s's automount point already active?", a->meta.id);
-        else if ((r = manager_add_job(a->meta.manager, JOB_START, UNIT(a->mount), JOB_REPLACE, true, NULL)) < 0) {
-                log_warning("%s failed to queue mount startup job: %s", a->meta.id, strerror(-r));
+        else if ((r = manager_add_job(a->meta.manager, JOB_START, UNIT(a->mount), JOB_REPLACE, true, &error, NULL)) < 0) {
+                log_warning("%s failed to queue mount startup job: %s", a->meta.id, bus_error(&error, r));
                 goto fail;
         }
 
@@ -555,6 +597,7 @@ static void automount_enter_runnning(Automount *a) {
 
 fail:
         automount_enter_dead(a, false);
+        dbus_error_free(&error);
 }
 
 static int automount_start(Unit *u) {
@@ -750,6 +793,17 @@ static void automount_shutdown(Manager *m) {
                 close_nointr_nofail(m->dev_autofs_fd);
 }
 
+static void automount_reset_maintenance(Unit *u) {
+        Automount *a = AUTOMOUNT(u);
+
+        assert(a);
+
+        if (a->state == AUTOMOUNT_MAINTENANCE)
+                automount_set_state(a, AUTOMOUNT_DEAD);
+
+        a->failure = false;
+}
+
 static const char* const automount_state_table[_AUTOMOUNT_STATE_MAX] = {
         [AUTOMOUNT_DEAD] = "dead",
         [AUTOMOUNT_WAITING] = "waiting",
@@ -786,6 +840,8 @@ const UnitVTable automount_vtable = {
 
         .fd_event = automount_fd_event,
 
+        .reset_maintenance = automount_reset_maintenance,
+
         .bus_message_handler = bus_automount_message_handler,
 
         .shutdown = automount_shutdown