tools/perf/trace/beauty/fcntl.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  * trace/beauty/fcntl.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 <linux/kernel.h>
  10 #include <uapi/linux/fcntl.h>
  11
  12 static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size, bool show_prefix)
  13 {
  14         return val ? scnprintf(bf, size, "%s", "0") :
  15                      scnprintf(bf, size, "%s%s", show_prefix ? "FD_" : "", "CLOEXEC");
  16 }
  17
  18 static size_t syscall_arg__scnprintf_fcntl_getfd(char *bf, size_t size, struct syscall_arg *arg)
  19 {
  20         return fcntl__scnprintf_getfd(arg->val, bf, size, arg->show_string_prefix);
  21 }
  22
  23 static size_t fcntl__scnprintf_getlease(unsigned long val, char *bf, size_t size, bool show_prefix)
  24 {
  25         static const char *fcntl_setlease[] = { "RDLCK", "WRLCK", "UNLCK", };
  26         static DEFINE_STRARRAY(fcntl_setlease, "F_");
  27
  28         return strarray__scnprintf(&strarray__fcntl_setlease, bf, size, "%x", show_prefix, val);
  29 }
  30
  31 static size_t syscall_arg__scnprintf_fcntl_getlease(char *bf, size_t size, struct syscall_arg *arg)
  32 {
  33         return fcntl__scnprintf_getlease(arg->val, bf, size, arg->show_string_prefix);
  34 }
  35
  36 size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_arg *arg)
  37 {
  38         if (arg->val == F_GETFL) {
  39                 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_open_flags);
  40                 goto mask_arg;
  41         }
  42         if (arg->val == F_GETFD) {
  43                 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getfd);
  44                 goto mask_arg;
  45         }
  46         if (arg->val == F_DUPFD_CLOEXEC || arg->val == F_DUPFD) {
  47                 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fd);
  48                 goto out;
  49         }
  50         if (arg->val == F_GETOWN) {
  51                 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_pid);
  52                 goto mask_arg;
  53         }
  54         if (arg->val == F_GETLEASE) {
  55                 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getlease);
  56                 goto mask_arg;
  57         }
  58         /*
  59          * Some commands ignore the third fcntl argument, "arg", so mask it
  60          */
  61         if (arg->val == F_GET_SEALS ||
  62             arg->val == F_GETSIG) {
  63 mask_arg:
  64                 arg->mask |= (1 << 2);
  65         }
  66 out:
  67         return syscall_arg__scnprintf_strarrays(bf, size, arg);
  68 }
  69
  70 size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_arg *arg)
  71 {
  72         bool show_prefix = arg->show_string_prefix;
  73         int cmd = syscall_arg__val(arg, 1);
  74
  75         if (cmd == F_DUPFD)
  76                 return syscall_arg__scnprintf_fd(bf, size, arg);
  77
  78         if (cmd == F_SETFD)
  79                 return fcntl__scnprintf_getfd(arg->val, bf, size, show_prefix);
  80
  81         if (cmd == F_SETFL)
  82                 return open__scnprintf_flags(arg->val, bf, size, show_prefix);
  83
  84         if (cmd == F_SETOWN)
  85                 return syscall_arg__scnprintf_pid(bf, size, arg);
  86
  87         if (cmd == F_SETLEASE)
  88                 return fcntl__scnprintf_getlease(arg->val, bf, size, show_prefix);
  89         /*
  90          * We still don't grab the contents of pointers on entry or exit,
  91          * so just print them as hex numbers
  92          */
  93         if (cmd == F_SETLK || cmd == F_SETLKW || cmd == F_GETLK ||
  94             cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW || cmd == F_OFD_GETLK ||
  95             cmd == F_GETOWN_EX || cmd == F_SETOWN_EX ||
  96             cmd == F_GET_RW_HINT || cmd == F_SET_RW_HINT ||
  97             cmd == F_GET_FILE_RW_HINT || cmd == F_SET_FILE_RW_HINT)
  98                 return syscall_arg__scnprintf_hex(bf, size, arg);
  99
 100         return syscall_arg__scnprintf_long(bf, size, arg);
 101 }