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 <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 } 102