102 lines · c
1// SPDX-License-Identifier: LGPL-2.12/*3 * trace/beauty/fcntl.c4 *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 <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 it60 */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 numbers92 */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