src/libsystemd/sd-bus/bus-kernel.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <sys/mman.h>
   4
   5 #include "bus-kernel.h"
   6 #include "bus-internal.h"
   7 #include "fd-util.h"
   8 #include "memory-util.h"
   9
  10 void close_and_munmap(int fd, void *address, size_t size) {
  11         if (size > 0) {
  12                 size = PAGE_ALIGN(size);
  13                 assert(size < SIZE_MAX);
  14                 assert_se(munmap(address, size) >= 0);
  15         }
  16
  17         safe_close(fd);
  18 }
  19
  20 void bus_flush_memfd(sd_bus *b) {
  21         assert(b);
  22
  23         for (unsigned i = 0; i < b->n_memfd_cache; i++)
  24                 close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped);
  25 }