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 <uapi/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 it
60	 */
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 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