1 /* 2 * trace/beauty/fcntl.c 3 * 4 * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 5 * 6 * Released under the GPL v2. (and only v2, not any later version) 7 */ 8 9 #include "trace/beauty/beauty.h" 10 #include <linux/kernel.h> 11 #include <uapi/linux/fcntl.h> 12 13 static size_t fcntl__scnprintf_getfd(unsigned long val, char *bf, size_t size) 14 { 15 return scnprintf(bf, size, "%s", val ? "CLOEXEC" : "0"); 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); 21 } 22 23 static size_t fcntl__scnprintf_getlease(unsigned long val, char *bf, size_t size) 24 { 25 static const char *fcntl_setlease[] = { "RDLCK", "WRLCK", "UNLCK", }; 26 static DEFINE_STRARRAY(fcntl_setlease); 27 28 return strarray__scnprintf(&strarray__fcntl_setlease, bf, size, "%x", 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); 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 int cmd = syscall_arg__val(arg, 1); 73 74 if (cmd == F_DUPFD) 75 return syscall_arg__scnprintf_fd(bf, size, arg); 76 77 if (cmd == F_SETFD) 78 return fcntl__scnprintf_getfd(arg->val, bf, size); 79 80 if (cmd == F_SETFL) 81 return open__scnprintf_flags(arg->val, bf, size); 82 83 if (cmd == F_SETOWN) 84 return syscall_arg__scnprintf_pid(bf, size, arg); 85 86 if (cmd == F_SETLEASE) 87 return fcntl__scnprintf_getlease(arg->val, bf, size); 88 /* 89 * We still don't grab the contents of pointers on entry or exit, 90 * so just print them as hex numbers 91 */ 92 if (cmd == F_SETLK || cmd == F_SETLKW || cmd == F_GETLK || 93 cmd == F_OFD_SETLK || cmd == F_OFD_SETLKW || cmd == F_OFD_GETLK || 94 cmd == F_GETOWN_EX || cmd == F_SETOWN_EX || 95 cmd == F_GET_RW_HINT || cmd == F_SET_RW_HINT || 96 cmd == F_GET_FILE_RW_HINT || cmd == F_SET_FILE_RW_HINT) 97 return syscall_arg__scnprintf_hex(bf, size, arg); 98 99 return syscall_arg__scnprintf_long(bf, size, arg); 100 } 101