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 #ifndef F_GET_RW_HINT 13 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11) 14 #endif 15 16 #ifndef F_SET_RW_HINT 17 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12) 18 #endif 19 20 #ifndef F_GET_FILE_RW_HINT 21 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13) 22 #endif 23 24 #ifndef F_SET_FILE_RW_HINT 25 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14) 26 #endif 27 28 static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size, bool show_prefix) 29 { 30 return val ? scnprintf(bf, size, "%s", "0") : 31 scnprintf(bf, size, "%s%s", show_prefix ? "FD_" : "", "CLOEXEC"); 32 } 33 34 static size_t syscall_arg__scnprintf_fcntl_getfd(char *bf, size_t size, struct syscall_arg *arg) 35 { 36 return fcntl__scnprintf_getfd(arg->val, bf, size, arg->show_string_prefix); 37 } 38 39 static size_t fcntl__scnprintf_getlease(unsigned long val, char *bf, size_t size, bool show_prefix) 40 { 41 static const char *fcntl_setlease[] = { "RDLCK", "WRLCK", "UNLCK", }; 42 static DEFINE_STRARRAY(fcntl_setlease, "F_"); 43 44 return strarray__scnprintf(&strarray__fcntl_setlease, bf, size, "%x", show_prefix, val); 45 } 46 47 static size_t syscall_arg__scnprintf_fcntl_getlease(char *bf, size_t size, struct syscall_arg *arg) 48 { 49 return fcntl__scnprintf_getlease(arg->val, bf, size, arg->show_string_prefix); 50 } 51 52 size_t syscall_arg__scnprintf_fcntl_cmd(char *bf, size_t size, struct syscall_arg *arg) 53 { 54 if (arg->val == F_GETFL) { 55 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_open_flags); 56 goto mask_arg; 57 } 58 if (arg->val == F_GETFD) { 59 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getfd); 60 goto mask_arg; 61 } 62 if (arg->val == F_DUPFD_CLOEXEC || arg->val == F_DUPFD) { 63 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fd); 64 goto out; 65 } 66 if (arg->val == F_GETOWN) { 67 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_pid); 68 goto mask_arg; 69 } 70 if (arg->val == F_GETLEASE) { 71 syscall_arg__set_ret_scnprintf(arg, syscall_arg__scnprintf_fcntl_getlease); 72 goto mask_arg; 73 } 74 /* 75 * Some commands ignore the third fcntl argument, "arg", so mask it 76 */ 77 if (arg->val == F_GET_SEALS || 78 arg->val == F_GETSIG) { 79 mask_arg: 80 arg->mask |= (1 << 2); 81 } 82 out: 83 return syscall_arg__scnprintf_strarrays(bf, size, arg); 84 } 85 86 size_t syscall_arg__scnprintf_fcntl_arg(char *bf, size_t size, struct syscall_arg *arg) 87 { 88 bool show_prefix = arg->show_string_prefix; 89 int cmd = syscall_arg__val(arg, 1); 90 91 if (cmd == F_DUPFD) 92 return syscall_arg__scnprintf_fd(bf, size, arg); 93 94 if (cmd == F_SETFD) 95 return fcntl__scnprintf_getfd(arg->val, bf, size, show_prefix); 96 97 if (cmd == F_SETFL) 98 return open__scnprintf_flags(arg->val, bf, size, show_prefix); 99 100 if (cmd == F_SETOWN) 101 return syscall_arg__scnprintf_pid(bf, size, arg); 102 103 if (cmd == F_SETLEASE) 104 return fcntl__scnprintf_getlease(arg->val, bf, size, show_prefix); 105 /* 106 * We still don't grab the contents of pointers on entry or exit, 107 * so just print them as hex numbers 108 */ 109 if (cmd == F_SETLK || cmd == F_SETLKW || cmd == F_GETLK || 110 cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW || cmd == F_OFD_GETLK || 111 cmd == F_GETOWN_EX || cmd == F_SETOWN_EX || 112 cmd == F_GET_RW_HINT || cmd == F_SET_RW_HINT || 113 cmd == F_GET_FILE_RW_HINT || cmd == F_SET_FILE_RW_HINT) 114 return syscall_arg__scnprintf_hex(bf, size, arg); 115 116 return syscall_arg__scnprintf_long(bf, size, arg); 117 } 118