Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
new file mode 100644
index 0000000..d7ff834
--- /dev/null
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#if HAVE_VALGRIND_MEMCHECK_H
+#include <valgrind/memcheck.h>
+#endif
+
+#include <fcntl.h>
+#include <malloc.h>
+#include <sys/mman.h>
+#include <sys/prctl.h>
+
+#include "alloc-util.h"
+#include "bus-internal.h"
+#include "bus-kernel.h"
+#include "bus-label.h"
+#include "bus-message.h"
+#include "capability-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "format-util.h"
+#include "memfd-util.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "memory-util.h"
+
+void close_and_munmap(int fd, void *address, size_t size) {
+        if (size > 0) {
+                size = PAGE_ALIGN(size);
+                assert(size < SIZE_MAX);
+                assert_se(munmap(address, size) >= 0);
+        }
+
+        safe_close(fd);
+}
+
+void bus_flush_memfd(sd_bus *b) {
+        assert(b);
+
+        for (unsigned i = 0; i < b->n_memfd_cache; i++)
+                close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped);
+}