tools/perf/trace/beauty/fsmount.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  * trace/beauty/fsmount.c
   4  *
   5  *  Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   6  */
   7
   8 #include "trace/beauty/beauty.h"
   9 #include <linux/log2.h>
  10 #include <sys/mount.h>
  11
  12 #ifndef MOUNT_ATTR__ATIME
  13 #define MOUNT_ATTR__ATIME       0x00000070 /* Setting on how atime should be updated */
  14 #endif
  15 #ifndef MOUNT_ATTR_RELATIME
  16 #define MOUNT_ATTR_RELATIME     0x00000000 /* - Update atime relative to mtime/ctime. */
  17 #endif
  18
  19 static size_t fsmount__scnprintf_attr_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
  20 {
  21 #include "trace/beauty/generated/fsmount_arrays.c"
  22        static DEFINE_STRARRAY(fsmount_attr_flags, "MOUNT_ATTR_");
  23        size_t printed = 0;
  24
  25        if ((flags & ~MOUNT_ATTR__ATIME) != 0)
  26                printed += strarray__scnprintf_flags(&strarray__fsmount_attr_flags, bf, size, show_prefix, flags);
  27
  28        if ((flags & MOUNT_ATTR__ATIME) == MOUNT_ATTR_RELATIME) {
  29                printed += scnprintf(bf + printed, size - printed, "%s%s%s",
  30                                     printed ? "|" : "", show_prefix ? "MOUNT_ATTR_" : "", "RELATIME");
  31        }
  32
  33        return printed;
  34 }
  35
  36 size_t syscall_arg__scnprintf_fsmount_attr_flags(char *bf, size_t size, struct syscall_arg *arg)
  37 {
  38         unsigned long flags = arg->val;
  39
  40         return fsmount__scnprintf_attr_flags(flags, bf, size, arg->show_string_prefix);
  41 }