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-rw-r--r--src/shared/util.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/src/shared/util.c b/src/shared/util.c
index 390ad1d83a..bda3c93ae3 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -61,6 +61,7 @@
#include <sys/personality.h>
#include <sys/xattr.h>
#include <libgen.h>
+#include <sys/statvfs.h>
#undef basename
#ifdef HAVE_SYS_AUXV_H
@@ -6858,6 +6859,15 @@ int umount_recursive(const char *prefix, int flags) {
return r ? r : n;
}
+static int get_mount_flags(const char *path, unsigned long *flags) {
+ struct statvfs buf;
+
+ if (statvfs(path, &buf) < 0)
+ return -errno;
+ *flags = buf.f_flag;
+ return 0;
+}
+
int bind_remount_recursive(const char *prefix, bool ro) {
_cleanup_set_free_free_ Set *done = NULL;
_cleanup_free_ char *cleaned = NULL;
@@ -6892,6 +6902,7 @@ int bind_remount_recursive(const char *prefix, bool ro) {
_cleanup_set_free_free_ Set *todo = NULL;
bool top_autofs = false;
char *x;
+ unsigned long orig_flags;
todo = set_new(&string_hash_ops);
if (!todo)
@@ -6969,7 +6980,11 @@ int bind_remount_recursive(const char *prefix, bool ro) {
if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0)
return -errno;
- if (mount(NULL, prefix, NULL, MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0)
+ r = get_mount_flags(prefix, &orig_flags);
+ if (r < 0)
+ return r;
+ orig_flags &= ~MS_RDONLY;
+ if (mount(NULL, prefix, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0)
return -errno;
x = strdup(cleaned);
@@ -6989,7 +7004,11 @@ int bind_remount_recursive(const char *prefix, bool ro) {
if (r < 0)
return r;
- if (mount(NULL, x, NULL, MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) {
+ r = get_mount_flags(x, &orig_flags);
+ if (r < 0)
+ return r;
+ orig_flags &= ~MS_RDONLY;
+ if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) {
/* Deal with mount points that are
* obstructed by a later mount */