LXR linux/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
  12static 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
  18static 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
  23static 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
  31static 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
  36size_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) {
  63mask_arg:
  64                arg->mask |= (1 << 2);
  65        }
  66out:
  67        return syscall_arg__scnprintf_strarrays(bf, size, arg);
  68}
  69
  70size_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}
 102