1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) International Business Machines  Corp., 2001
4 * Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
5 *
6 * This program is free software;  you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
14 * the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program;  if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#ifndef GETDENTS_H
22#define GETDENTS_H
23
24#include <stdint.h>
25#include "config.h"
26#include "lapi/syscalls.h"
27
28#if HAVE_GETDENTS || HAVE_GETDENTS64
29#include <unistd.h>
30#endif
31
32/*
33 * See fs/compat.c struct compat_linux_dirent
34 */
35struct linux_dirent {
36	unsigned long   d_ino;
37	unsigned long   d_off;
38	unsigned short  d_reclen;
39	char            d_name[];
40};
41
42static inline int
43linux_getdents(unsigned int fd, struct linux_dirent *dirp, unsigned int size)
44{
45	return tst_syscall(__NR_getdents, fd, dirp, size);
46}
47
48struct linux_dirent64 {
49	uint64_t	d_ino;
50	int64_t		d_off;
51	unsigned short	d_reclen;
52	unsigned char	d_type;
53	char		d_name[];
54};
55
56static inline int
57linux_getdents64(unsigned int fd, struct linux_dirent64 *dirp64, unsigned int size)
58{
59	return tst_syscall(__NR_getdents64, fd, dirp64, size);
60}
61
62static inline size_t
63tst_dirp_size(void)
64{
65	switch (tst_variant) {
66	case 0:
67		return sizeof(struct linux_dirent);
68	case 1:
69		return sizeof(struct linux_dirent64);
70#if HAVE_GETDENTS
71	case 2:
72		return sizeof(struct dirent);
73#endif
74#if HAVE_GETDENTS64
75	case 3:
76		return sizeof(struct dirent64);
77#endif
78	}
79	return 0;
80}
81
82static inline const char *
83tst_dirp_name(void *dirp)
84{
85	switch (tst_variant) {
86	case 0:
87		return ((struct linux_dirent *)dirp)->d_name;
88	case 1:
89		return ((struct linux_dirent64 *)dirp)->d_name;
90#if HAVE_GETDENTS
91	case 2:
92		return ((struct dirent *)dirp)->d_name;
93#endif
94#if HAVE_GETDENTS64
95	case 3:
96		return ((struct dirent64 *)dirp)->d_name;
97#endif
98	}
99	return NULL;
100}
101
102static inline size_t
103tst_dirp_reclen(void *dirp)
104{
105	switch (tst_variant) {
106	case 0:
107		return ((struct linux_dirent *)dirp)->d_reclen;
108	case 1:
109		return ((struct linux_dirent64 *)dirp)->d_reclen;
110#if HAVE_GETDENTS
111	case 2:
112		return ((struct dirent *)dirp)->d_reclen;
113#endif
114#if HAVE_GETDENTS64
115	case 3:
116		return ((struct dirent64 *)dirp)->d_reclen;
117#endif
118
119	}
120	return 0;
121}
122
123static inline int
124tst_getdents(int fd, void *dirp, unsigned int size)
125{
126	switch (tst_variant) {
127	case 0:
128		return linux_getdents(fd, dirp, size);
129	case 1:
130		return linux_getdents64(fd, dirp, size);
131#if HAVE_GETDENTS
132	case 2:
133		return getdents(fd, dirp, size);
134#endif
135#if HAVE_GETDENTS64
136	case 3:
137		return getdents64(fd, dirp, size);
138#endif
139	}
140	return -1;
141}
142
143static inline void
144getdents_info(void)
145{
146	switch (tst_variant) {
147	case 0:
148		tst_res(TINFO, "Testing the SYS_getdents syscall");
149		break;
150	case 1:
151		tst_res(TINFO, "Testing the SYS_getdents64 syscall");
152		break;
153	case 2:
154#if HAVE_GETDENTS
155		tst_res(TINFO, "Testing libc getdents()");
156#else
157		tst_brk(TCONF, "libc getdents() is not implemented");
158#endif
159		break;
160	case 3:
161#if HAVE_GETDENTS64
162		tst_res(TINFO, "Testing libc getdents64()");
163#else
164		tst_brk(TCONF, "libc getdents64() is not implemented");
165#endif
166		break;
167	}
168}
169
170#define TEST_VARIANTS 4
171
172#endif /* GETDENTS_H */
173