core: add catalog entry and MESSAGE_ID for overmounting

6 files changed, 22 insertions, 6 deletions

diff --git a/src/core/automount.c b/src/core/automount.c
index 5bf59df8bc..74776646f6 100644
--- a/src/core/automount.c
+++ b/src/core/automount.c
@@ -31,6 +31,7 @@
 
 #include "unit.h"
 #include "automount.h"
+#include "mount.h"
 #include "load-fragment.h"
 #include "load-dropin.h"
 #include "unit-name.h"
@@ -507,8 +508,7 @@ static void automount_enter_waiting(Automount *a) {
         /* We knowingly ignore the results of this call */
         mkdir_p_label(a->where, 0555);
 
-        if (dir_is_empty(a->where) <= 0)
-                log_notice("%s: Directory %s to mount over is not empty, mounting anyway. (To see the over-mounted files, please manually mount the underlying file system to a secondary location.)", a->meta.id, a->where);
+        warn_if_dir_nonempty(a->meta.id, a->where);
 
         if (pipe2(p, O_NONBLOCK|O_CLOEXEC) < 0) {
                 r = -errno;
diff --git a/src/core/execute.c b/src/core/execute.c
index e236d38e0f..76284700d7 100644
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -50,6 +50,7 @@
 #include "capability.h"
 #include "util.h"
 #include "log.h"
+#include "sd-messages.h"
 #include "ioprio.h"
 #include "securebits.h"
 #include "cgroup.h"
@@ -62,8 +63,6 @@
 #include "loopback-setup.h"
 #include "path-util.h"
 #include "syscall-list.h"
-#include "sd-id128.h"
-#include "sd-messages.h"
 
 #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC)
 
diff --git a/src/core/mount.c b/src/core/mount.c
index 09a5d286d3..f263d9b9d1 100644
--- a/src/core/mount.c
+++ b/src/core/mount.c
@@ -30,6 +30,7 @@
 #include "load-fragment.h"
 #include "load-dropin.h"
 #include "log.h"
+#include "sd-messages.h"
 #include "strv.h"
 #include "mkdir.h"
 #include "path-util.h"
@@ -927,6 +928,18 @@ fail:
                 set_free(pid_set);
 }
 
+void warn_if_dir_nonempty(const char *unit, const char* where) {
+        if (dir_is_empty(where) > 0)
+                return;
+        log_struct(LOG_NOTICE,
+                   "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.",
+                   unit, where,
+                   "WHERE=%s", where,
+                   "_SYSTEMD_UNIT=%s", unit,
+                   MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
+                   NULL);
+}
+
 static void mount_enter_unmounting(Mount *m) {
         int r;
 
@@ -967,8 +980,7 @@ static void mount_enter_mounting(Mount *m) {
 
         mkdir_p_label(m->where, m->directory_mode);
 
-        if (dir_is_empty(m->where) <= 0)
-                log_notice("%s: Directory %s to mount over is not empty, mounting anyway. (To see the over-mounted files, please manually mount the underlying file system to a secondary location.)", m->meta.id, m->where);
+        warn_if_dir_nonempty(m->meta.id, m->where);
 
         /* Create the source directory for bind-mounts if needed */
         p = get_mount_parameters_fragment(m);
diff --git a/src/core/mount.h b/src/core/mount.h
index 67d6132a5d..30c6d9b249 100644
--- a/src/core/mount.h
+++ b/src/core/mount.h
@@ -119,3 +119,5 @@ MountExecCommand mount_exec_command_from_string(const char *s);
 
 const char* mount_result_to_string(MountResult i);
 MountResult mount_result_from_string(const char *s);
+
+void warn_if_dir_nonempty(const char *unit, const char* where);
diff --git a/src/shared/log.h b/src/shared/log.h
index 1bd9dbf27a..5c946faf51 100644
--- a/src/shared/log.h
+++ b/src/shared/log.h
@@ -27,6 +27,7 @@
 #include <errno.h>
 
 #include "macro.h"
+#include "sd-id128.h"
 
 typedef enum LogTarget{
         LOG_TARGET_CONSOLE,
diff --git a/src/systemd/sd-messages.h b/src/systemd/sd-messages.h
index b8b78d10ed..bc560947d4 100644
--- a/src/systemd/sd-messages.h
+++ b/src/systemd/sd-messages.h
@@ -65,6 +65,8 @@ extern "C" {
 
 #define SD_MESSAGE_FORWARD_SYSLOG_MISSED SD_ID128_MAKE(00,27,22,9c,a0,64,41,81,a7,6c,4e,92,45,8a,fa,2e)
 
+#define SD_MESSAGE_OVERMOUNTING     SD_ID128_MAKE(1d,ee,03,69,c7,fc,47,36,b7,09,9b,38,ec,b4,6e,e7)
+
 #ifdef __cplusplus
 }
 #endif