tools/perf/trace/beauty/fs_at_flags.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  * trace/beauty/fs_at_flags.c
   4  *
   5  *  Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   6  */
   7
   8 #include "trace/beauty/beauty.h"
   9 #include <sys/types.h>
  10 #include <linux/fcntl.h>
  11 #include <linux/log2.h>
  12
  13 /*
  14  * uapi/linux/fcntl.h does not keep a copy in tools headers directory,
  15  * for system with kernel versions before v5.8, need to sync AT_EACCESS macro.
  16  */
  17 #ifndef AT_EACCESS
  18 #define AT_EACCESS 0x200
  19 #endif
  20
  21 #include "trace/beauty/generated/fs_at_flags_array.c"
  22 static DEFINE_STRARRAY(fs_at_flags, "AT_");
  23
  24 static size_t fs_at__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
  25 {
  26         return strarray__scnprintf_flags(&strarray__fs_at_flags, bf, size, show_prefix, flags);
  27 }
  28
  29 size_t syscall_arg__scnprintf_fs_at_flags(char *bf, size_t size, struct syscall_arg *arg)
  30 {
  31         bool show_prefix = arg->show_string_prefix;
  32         int flags = arg->val;
  33
  34         return fs_at__scnprintf_flags(flags, bf, size, show_prefix);
  35 }
  36
  37 static size_t faccessat2__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
  38 {
  39         int printed = 0;
  40
  41         // AT_EACCESS is the same as AT_REMOVEDIR, that is in fs_at_flags_array,
  42         // special case it here.
  43         if (flags & AT_EACCESS) {
  44                 flags &= ~AT_EACCESS;
  45                 printed += scnprintf(bf + printed, size - printed, "%sEACCESS%s",
  46                                      show_prefix ? strarray__fs_at_flags.prefix : "", flags ? "|" : "");
  47         }
  48
  49         return strarray__scnprintf_flags(&strarray__fs_at_flags, bf + printed, size - printed, show_prefix, flags);
  50 }
  51
  52 size_t syscall_arg__scnprintf_faccessat2_flags(char *bf, size_t size, struct syscall_arg *arg)
  53 {
  54         bool show_prefix = arg->show_string_prefix;
  55         int flags = arg->val;
  56
  57         return faccessat2__scnprintf_flags(flags, bf, size, show_prefix);
  58 }