1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2017 Fujitsu Ltd.
4 * Author: Xiao Yang <[email protected]>
5 */
6
7 /*\
8 * [Description]
9 *
10 * quotactl(2) with XGETNEXTQUOTA looks for the next active quota for an user
11 * equal or higher to a given ID, in this test the ID is specified to a value
12 * close to UINT_MAX(max value of unsigned int). When reaching the upper limit
13 * and finding no active quota, it should return -1 and set errno to ENOENT.
14 * Actually, quotactl(2) overflows and and return 0 as the "next" active id.
15 *
16 * This kernel bug of xfs has been fixed in:
17 *
18 * commit 657bdfb7f5e68ca5e2ed009ab473c429b0d6af85
19 * Author: Eric Sandeen <[email protected]>
20 * Date: Tue Jan 17 11:43:38 2017 -0800
21 *
22 * xfs: don't wrap ID in xfs_dq_get_next_id
23 */
24
25 #define _GNU_SOURCE
26 #include <errno.h>
27 #include <unistd.h>
28 #include <stdio.h>
29 #include <sys/quota.h>
30
31 #include "tst_test.h"
32 #include "quotactl_syscall_var.h"
33
34 #ifdef HAVE_XFS_XQM_H
35 # include <xfs/xqm.h>
36
37 static uint32_t test_id = 0xfffffffc;
38
verify_quota(void)39 static void verify_quota(void)
40 {
41 struct fs_disk_quota res_dquota;
42
43 res_dquota.d_id = 1;
44
45 TEST(do_quotactl(fd, QCMD(Q_XGETNEXTQUOTA, USRQUOTA), tst_device->dev,
46 test_id, (void *)&res_dquota));
47 if (TST_RET != -1) {
48 tst_res(TFAIL, "quotactl() found the next active ID: %u unexpectedly",
49 res_dquota.d_id);
50 return;
51 }
52
53 if (TST_ERR == EINVAL)
54 tst_brk(TCONF | TTERRNO,
55 "Q_XGETNEXTQUOTA wasn't supported in quotactl()");
56
57 if (TST_ERR != ENOENT)
58 tst_res(TFAIL | TTERRNO, "quotactl() failed unexpectedly with %s expected ENOENT",
59 tst_strerrno(TST_ERR));
60 else
61 tst_res(TPASS, "quotactl() failed with ENOENT as expected");
62 }
63
setup(void)64 static void setup(void)
65 {
66 quotactl_info();
67 fd = SAFE_OPEN(MNTPOINT, O_RDONLY);
68 }
69
cleanup(void)70 static void cleanup(void)
71 {
72 if (fd > -1)
73 SAFE_CLOSE(fd);
74 }
75
76 static struct tst_test test = {
77 .setup = setup,
78 .cleanup = cleanup,
79 .needs_root = 1,
80 .needs_kconfigs = (const char *[]) {
81 "CONFIG_XFS_QUOTA",
82 NULL
83 },
84 .test_all = verify_quota,
85 .mount_device = 1,
86 .dev_fs_type = "xfs",
87 .mntpoint = MNTPOINT,
88 .mnt_data = "usrquota",
89 .test_variants = QUOTACTL_SYSCALL_VARIANTS,
90 .tags = (const struct tst_tag[]) {
91 {"linux-git", "657bdfb7f5e6"},
92 {}
93 }
94 };
95
96 #else
97 TST_TEST_TCONF("System doesn't have <xfs/xqm.h>");
98 #endif
99