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

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #if HAVE_VALGRIND_MEMCHECK_H
   4 #include <valgrind/memcheck.h>
   5 #endif
   6
   7 #include <fcntl.h>
   8 #include <malloc.h>
   9 #include <sys/mman.h>
  10 #include <sys/prctl.h>
  11
  12 #include "alloc-util.h"
  13 #include "bus-internal.h"
  14 #include "bus-kernel.h"
  15 #include "bus-label.h"
  16 #include "bus-message.h"
  17 #include "capability-util.h"
  18 #include "fd-util.h"
  19 #include "fileio.h"
  20 #include "format-util.h"
  21 #include "memfd-util.h"
  22 #include "parse-util.h"
  23 #include "stdio-util.h"
  24 #include "string-util.h"
  25 #include "strv.h"
  26 #include "user-util.h"
  27 #include "memory-util.h"
  28
  29 void close_and_munmap(int fd, void *address, size_t size) {
  30         if (size > 0) {
  31                 size = PAGE_ALIGN(size);
  32                 assert(size < SIZE_MAX);
  33                 assert_se(munmap(address, size) >= 0);
  34         }
  35
  36         safe_close(fd);
  37 }
  38
  39 void bus_flush_memfd(sd_bus *b) {
  40         assert(b);
  41
  42         for (unsigned i = 0; i < b->n_memfd_cache; i++)
  43                 close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped);
  44 }