core,shutdown: don't bother with unmounting any mounts below /sys, /proc, /dev when...

[elogind.git] / src / core / mount.c

diff --git a/src/core/mount.c b/src/core/mount.c
index 13c634807b07672ea0b8eba1aa4a831958348b99..f944c02e2bea7001bb922eebc4dc6c51d2a851a6 100644 (file)
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -44,6 +44,7 @@
 #include "bus-common-errors.h"
 #include "exit-status.h"
 #include "def.h"
+#include "fstab-util.h"
 
 #define RETRY_UMOUNT_MAX 32
 
@@ -70,7 +71,7 @@ static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *user
 static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
 
 static bool mount_needs_network(const char *options, const char *fstype) {
-        if (mount_test_option(options, "_netdev"))
+        if (fstab_test_option(options, "_netdev\0"))
                 return true;
 
         if (fstype && fstype_is_network(fstype))
@@ -88,16 +89,10 @@ static bool mount_is_network(const MountParameters *p) {
 static bool mount_is_bind(const MountParameters *p) {
         assert(p);
 
-        if (mount_test_option(p->options, "bind"))
+        if (fstab_test_option(p->options, "bind\0" "rbind\0"))
                 return true;
 
-        if (p->fstype && streq(p->fstype, "bind"))
-                return true;
-
-        if (mount_test_option(p->options, "rbind"))
-                return true;
-
-        if (p->fstype && streq(p->fstype, "rbind"))
+        if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind"))
                 return true;
 
         return false;
@@ -106,7 +101,7 @@ static bool mount_is_bind(const MountParameters *p) {
 static bool mount_is_auto(const MountParameters *p) {
         assert(p);
 
-        return !mount_test_option(p->options, "noauto");
+        return !fstab_test_option(p->options, "noauto\0");
 }
 
 static bool needs_quota(const MountParameters *p) {
@@ -118,11 +113,8 @@ static bool needs_quota(const MountParameters *p) {
         if (mount_is_bind(p))
                 return false;
 
-        return mount_test_option(p->options, "usrquota") ||
-                mount_test_option(p->options, "grpquota") ||
-                mount_test_option(p->options, "quota") ||
-                mount_test_option(p->options, "usrjquota") ||
-                mount_test_option(p->options, "grpjquota");
+        return fstab_test_option(p->options,
+                                 "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0");
 }
 
 static void mount_init(Unit *u) {
@@ -369,7 +361,7 @@ static bool should_umount(Mount *m) {
                 return false;
 
         p = get_mount_parameters(m);
-        if (p && mount_test_option(p->options, "x-initrd.mount") &&
+        if (p && fstab_test_option(p->options, "x-initrd.mount\0") &&
             !in_initrd())
                 return false;
 
@@ -386,13 +378,20 @@ static int mount_add_default_dependencies(Mount *m) {
         if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
                 return 0;
 
-        p = get_mount_parameters(m);
-
-        if (!p)
+        /* We do not add any default dependencies to / and /usr, since
+         * they are guaranteed to stay mounted the whole time, since
+         * our system is on it. Also, don't bother with anything
+         * mounted below virtual file systems, it's also going to be
+         * virtual, and hence not worth the effort. */
+        if (path_equal(m->where, "/") ||
+            path_equal(m->where, "/usr") ||
+            path_startswith(m->where, "/proc") ||
+            path_startswith(m->where, "/sys") ||
+            path_startswith(m->where, "/dev"))
                 return 0;
 
-        if (path_equal(m->where, "/") ||
-            path_equal(m->where, "/usr"))
+        p = get_mount_parameters(m);
+        if (!p)
                 return 0;
 
         if (mount_is_network(p)) {
@@ -925,6 +924,13 @@ static void mount_enter_mounting(Mount *m) {
                 goto fail;
 
         if (m->from_fragment) {
+                _cleanup_free_ char *opts = NULL;
+
+                r = fstab_filter_options(m->parameters_fragment.options,
+                                         "nofail\0" "noauto\0" "auto\0", NULL, NULL, &opts);
+                if (r < 0)
+                        goto fail;
+
                 r = exec_command_set(m->control_command, "/bin/mount",
                                      m->parameters_fragment.what, m->where, NULL);
                 if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
@@ -933,8 +939,8 @@ static void mount_enter_mounting(Mount *m) {
                         r = exec_command_append(m->control_command, "-s", NULL);
                 if (r >= 0 && m->parameters_fragment.fstype)
                         r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL);
-                if (r >= 0 && m->parameters_fragment.options)
-                        r = exec_command_append(m->control_command, "-o", m->parameters_fragment.options, NULL);
+                if (r >= 0 && !isempty(opts))
+                        r = exec_command_append(m->control_command, "-o", opts, NULL);
         } else
                 r = -ENOENT;