core: remove SmackFileSystemRootLabel= again

Apparently, util-linux' mount command implicitly drops the smack-related
options anyway before passing them to the kernel, if the kernel doesn't
know SMACK, hence there's no point in duplicating this in systemd.

Fixes #1696

6 files changed, 5 insertions, 47 deletions

diff --git a/man/systemd.mount.xml b/man/systemd.mount.xml
index 67e96dc157..a724d88584 100644
--- a/man/systemd.mount.xml
+++ b/man/systemd.mount.xml
@@ -366,18 +366,6 @@
       </varlistentry>
 
       <varlistentry>
-        <term><varname>SmackFileSystemRootLabel=</varname></term>
-        <listitem><para>Takes a string for the SMACK label.
-        This option specifies the label to assign the root of the
-        file system if it lacks the SMACK extended attribute.
-        Note that this option will be ignored if kernel does not
-        support the SMACK feature.
-        See <ulink
-        url="https://www.kernel.org/doc/Documentation/security/Smack.txt">Smack.txt</ulink>
-        for details. </para></listitem>
-      </varlistentry>
-
-      <varlistentry>
         <term><varname>TimeoutSec=</varname></term>
         <listitem><para>Configures the time to wait for the mount
         command to finish. If a command does not exit within the
diff --git a/src/core/dbus-mount.c b/src/core/dbus-mount.c
index 0c91850c52..90a6d37073 100644
--- a/src/core/dbus-mount.c
+++ b/src/core/dbus-mount.c
@@ -118,7 +118,6 @@ const sd_bus_vtable bus_mount_vtable[] = {
         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Mount, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Mount, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
         SD_BUS_PROPERTY("SloppyOptions", "b", bus_property_get_bool, offsetof(Mount, sloppy_options), SD_BUS_VTABLE_PROPERTY_CONST),
-        SD_BUS_PROPERTY("SmackFileSystemRootLabel", "s", NULL, offsetof(Mount, smack_fs_root_label), SD_BUS_VTABLE_PROPERTY_CONST),
         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Mount, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
         BUS_EXEC_COMMAND_VTABLE("ExecMount", offsetof(Mount, exec_command[MOUNT_EXEC_MOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
         BUS_EXEC_COMMAND_VTABLE("ExecUnmount", offsetof(Mount, exec_command[MOUNT_EXEC_UNMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
diff --git a/src/core/load-fragment-gperf.gperf.m4 b/src/core/load-fragment-gperf.gperf.m4
index 3294054ef7..c7ec027954 100644
--- a/src/core/load-fragment-gperf.gperf.m4
+++ b/src/core/load-fragment-gperf.gperf.m4
@@ -320,7 +320,6 @@ Mount.Type,                      config_parse_string,                0,
 Mount.TimeoutSec,                config_parse_sec,                   0,                             offsetof(Mount, timeout_usec)
 Mount.DirectoryMode,             config_parse_mode,                  0,                             offsetof(Mount, directory_mode)
 Mount.SloppyOptions,             config_parse_bool,                  0,                             offsetof(Mount, sloppy_options)
-Mount.SmackFileSystemRootLabel,  config_parse_string,                0,                             offsetof(Mount, smack_fs_root_label)
 EXEC_CONTEXT_CONFIG_ITEMS(Mount)m4_dnl
 CGROUP_CONTEXT_CONFIG_ITEMS(Mount)m4_dnl
 KILL_CONTEXT_CONFIG_ITEMS(Mount)m4_dnl
diff --git a/src/core/mount.c b/src/core/mount.c
index e86bcf3830..9b44357e90 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -41,7 +41,6 @@
 #include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"
-#include "smack-util.h"
 #include "special.h"
 #include "string-table.h"
 #include "string-util.h"
@@ -211,7 +210,6 @@ static void mount_done(Unit *u) {
         assert(m);
 
         m->where = mfree(m->where);
-        m->smack_fs_root_label = mfree(m->smack_fs_root_label);
 
         mount_parameters_done(&m->parameters_proc_self_mountinfo);
         mount_parameters_done(&m->parameters_fragment);
@@ -682,8 +680,7 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) {
                 "%sOptions: %s\n"
                 "%sFrom /proc/self/mountinfo: %s\n"
                 "%sFrom fragment: %s\n"
-                "%sDirectoryMode: %04o\n"
-                "%sSmackFileSystemRootLabel: %s\n",
+                "%sDirectoryMode: %04o\n",
                 prefix, mount_state_to_string(m->state),
                 prefix, mount_result_to_string(m->result),
                 prefix, m->where,
@@ -692,8 +689,7 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) {
                 prefix, p ? strna(p->options) : "n/a",
                 prefix, yes_no(m->from_proc_self_mountinfo),
                 prefix, yes_no(m->from_fragment),
-                prefix, m->directory_mode,
-                prefix, strna(m->smack_fs_root_label));
+                prefix, m->directory_mode);
 
         if (m->control_pid > 0)
                 fprintf(f,
@@ -870,29 +866,9 @@ fail:
         mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
 }
 
-static int mount_get_opts(Mount *m, char **_opts) {
-        int r;
-        char *o = NULL, *opts = NULL;
-
-        r = fstab_filter_options(m->parameters_fragment.options,
-                                 "nofail\0" "noauto\0" "auto\0", NULL, NULL, &o);
-        if (r < 0)
-                return r;
-
-        if (mac_smack_use() && m->smack_fs_root_label) {
-                if (!isempty(o)) {
-                        opts = strjoin(o, ",", "smackfsroot=", m->smack_fs_root_label, NULL);
-                        free(o);
-                } else
-                        opts = strjoin("smackfsroot=", m->smack_fs_root_label, NULL);
-
-                if (!opts)
-                        return -ENOMEM;
-        } else
-                opts = o;
-
-        *_opts = opts;
-        return 0;
+static int mount_get_opts(Mount *m, char **ret) {
+        return fstab_filter_options(m->parameters_fragment.options,
+                                    "nofail\0" "noauto\0" "auto\0", NULL, NULL, ret);
 }
 
 static void mount_enter_mounting(Mount *m) {
diff --git a/src/core/mount.h b/src/core/mount.h
index b344b5aa13..83d14ae713 100644
--- a/src/core/mount.h
+++ b/src/core/mount.h
@@ -71,7 +71,6 @@ struct Mount {
         bool reset_cpu_usage:1;
 
         bool sloppy_options;
-        char *smack_fs_root_label;
 
         MountResult result;
         MountResult reload_result;
diff --git a/units/tmp.mount.m4 b/units/tmp.mount.m4
index 6402200c62..00a0d28722 100644
--- a/units/tmp.mount.m4
+++ b/units/tmp.mount.m4
@@ -19,6 +19,3 @@ What=tmpfs
 Where=/tmp
 Type=tmpfs
 Options=mode=1777,strictatime
-m4_ifdef(`HAVE_SMACK',
-SmackFileSystemRootLabel=*
-)m4_dnl