1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2012 Red Hat, Inc.
4 */
5
6/*
7 * setxattr(2) to immutable and append-only files should get EPERM
8 *
9 * There are 2 test cases:
10 * 1. Set attribute to a immutable file, setxattr(2) should return -1
11 *    and set errno to EPERM
12 * 2. Set attribute to a append-only file, setxattr(2) should return
13 *    -1 and set errno to EPERM
14 */
15
16#define _GNU_SOURCE
17#include "config.h"
18#include <sys/ioctl.h>
19#include <sys/types.h>
20#include <sys/stat.h>
21#include <sys/wait.h>
22#include <errno.h>
23#include <fcntl.h>
24#include <unistd.h>
25#include <signal.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#ifdef HAVE_SYS_XATTR_H
30# include <sys/xattr.h>
31#endif
32#include "lapi/fs.h"
33
34#include "tst_test.h"
35
36#if defined HAVE_SYS_XATTR_H
37#define XATTR_TEST_KEY "user.testkey"
38#define XATTR_TEST_VALUE "this is a test value"
39#define XATTR_TEST_VALUE_SIZE (sizeof(XATTR_TEST_VALUE) - 1)
40
41#define IMMU_FILE "setxattr03immutable"
42#define APPEND_FILE  "setxattr03appendonly"
43
44#define set_immutable_on(fd) fsetflag(fd, 1, 1)
45#define set_immutable_off(fd) fsetflag(fd, 0, 1)
46#define set_append_on(fd) fsetflag(fd, 1, 0)
47#define set_append_off(fd) fsetflag(fd, 0, 0)
48
49struct test_case {
50	char *desc;
51	char *fname;
52	char *key;
53	char *value;
54	size_t size;
55	int flags;
56	int exp_err;
57};
58static struct test_case tc[] = {
59	{			/* case 00, set attr to immutable file */
60	 .desc = "Set attr to immutable file",
61	 .fname = IMMU_FILE,
62	 .key = XATTR_TEST_KEY,
63	 .value = XATTR_TEST_VALUE,
64	 .size = XATTR_TEST_VALUE_SIZE,
65	 .flags = XATTR_CREATE,
66	 .exp_err = EPERM,
67	},
68	{			/* case 01, set attr to append-only file */
69	 .desc = "Set attr to append-only file",
70	 .fname = APPEND_FILE,
71	 .key = XATTR_TEST_KEY,
72	 .value = XATTR_TEST_VALUE,
73	 .size = XATTR_TEST_VALUE_SIZE,
74	 .flags = XATTR_CREATE,
75	 .exp_err = EPERM,
76	},
77};
78
79static int immu_fd;
80static int append_fd;
81
82static void verify_setxattr(unsigned int i)
83{
84	TEST(setxattr(tc[i].fname, tc[i].key, tc[i].value, tc[i].size,
85			tc[i].flags));
86
87	if (!TST_RET) {
88		tst_res(TFAIL, "%s succeeded unexpectedly", tc[i].desc);
89		return;
90	}
91
92	if (TST_ERR != tc[i].exp_err) {
93		tst_res(TFAIL | TTERRNO, "%s - expected %s, got", tc[i].desc,
94			tst_strerrno(tc[i].exp_err));
95		return;
96	}
97
98	tst_res(TPASS | TTERRNO, "%s", tc[i].desc);
99}
100
101static int fsetflag(int fd, int on, int immutable)
102{
103	int fsflags = 0;
104	int fsfl;
105
106	if (ioctl(fd, FS_IOC_GETFLAGS, &fsflags) < 0)
107		return 1;
108
109	if (immutable)
110		fsfl = FS_IMMUTABLE_FL;
111	else
112		fsfl = FS_APPEND_FL;
113
114	if (on)
115		fsflags |= fsfl;
116	else
117		fsflags &= ~fsfl;
118
119	if (ioctl(fd, FS_IOC_SETFLAGS, &fsflags) < 0)
120		return 1;
121
122	return 0;
123}
124
125static void setup(void)
126{
127	int fd;
128
129	/* Test for xattr support */
130	fd = SAFE_CREAT("testfile", 0644);
131	SAFE_CLOSE(fd);
132	if (setxattr("testfile", "user.test", "test", 4, XATTR_CREATE) == -1)
133		if (errno == ENOTSUP)
134			tst_brk(TCONF, "No xattr support in fs or "
135				 "fs mounted without user_xattr option");
136	SAFE_UNLINK("testfile");
137
138	/* Create test files and set file immutable or append-only */
139	immu_fd = SAFE_CREAT(IMMU_FILE, 0644);
140	if (set_immutable_on(immu_fd))
141		tst_brk(TBROK | TERRNO, "Set %s immutable failed",
142			 IMMU_FILE);
143
144	append_fd = SAFE_CREAT(APPEND_FILE, 0644);
145	if (set_append_on(append_fd))
146		tst_brk(TBROK | TERRNO, "Set %s append-only failed",
147			APPEND_FILE);
148}
149
150static void cleanup(void)
151{
152	if ((immu_fd > 0) && set_immutable_off(immu_fd))
153		tst_res(TWARN | TERRNO, "Unset %s immutable failed",
154			 IMMU_FILE);
155
156	if ((append_fd > 0) && set_append_off(append_fd))
157		tst_res(TWARN | TERRNO, "Unset %s append-only failed",
158			 APPEND_FILE);
159
160	if (immu_fd > 0)
161		SAFE_CLOSE(immu_fd);
162
163	if (append_fd > 0)
164		SAFE_CLOSE(append_fd);
165}
166
167static struct tst_test test = {
168	.setup = setup,
169	.cleanup = cleanup,
170	.test = verify_setxattr,
171	.tcnt = ARRAY_SIZE(tc),
172	.needs_tmpdir = 1,
173	.needs_root = 1,
174};
175
176#else
177TST_TEST_TCONF("<sys/xattr.h> does not exist");
178#endif /* defined HAVE_SYS_XATTR_H */
179