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", "") :
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
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