1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Portions Copyright 2020 iXsystems, Inc.
25 */
26
27 /*
28 * Test some invalid send operations with libzfs/libzfs_core.
29 *
30 * Specifying the to and from snaps in the wrong order should return EXDEV.
31 * We are checking that the early return doesn't accidentally leave any
32 * references held, so this test is designed to trigger a panic when asserts
33 * are verified with the bug present.
34 */
35
36 #include <libzfs.h>
37 #include <libzfs_core.h>
38
39 #include <fcntl.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <sysexits.h>
44 #include <err.h>
45
46 static void
usage(const char * name)47 usage(const char *name)
48 {
49 fprintf(stderr, "usage: %s snap0 snap1\n", name);
50 exit(EX_USAGE);
51 }
52
53 int
main(int argc,char const * const argv[])54 main(int argc, char const * const argv[])
55 {
56 sendflags_t flags = { 0 };
57 libzfs_handle_t *zhdl;
58 zfs_handle_t *zhp;
59 const char *fromfull, *tofull, *fsname, *fromsnap, *tosnap, *p;
60 uint64_t size;
61 int fd, error;
62
63 if (argc != 3)
64 usage(argv[0]);
65
66 fromfull = argv[1];
67 tofull = argv[2];
68
69 p = strchr(fromfull, '@');
70 if (p == NULL)
71 usage(argv[0]);
72 fromsnap = p + 1;
73
74 p = strchr(tofull, '@');
75 if (p == NULL)
76 usage(argv[0]);
77 tosnap = p + 1;
78
79 fsname = strndup(tofull, p - tofull);
80 if (fsname == NULL) {
81 perror("strndup");
82 exit(EXIT_FAILURE);
83 }
84 if (strncmp(fsname, fromfull, p - tofull) != 0)
85 usage(argv[0]);
86
87 fd = open("/dev/null", O_WRONLY);
88 if (fd == -1)
89 err(EX_OSERR, "open(\"/dev/null\", O_WRONLY)");
90
91 zhdl = libzfs_init();
92 if (zhdl == NULL)
93 errx(EX_OSERR, "libzfs_init(): %s", libzfs_error_init(errno));
94
95 zhp = zfs_open(zhdl, fsname, ZFS_TYPE_FILESYSTEM);
96 if (zhp == NULL)
97 err(EX_OSERR, "zfs_open(\"%s\")", fsname);
98
99 /*
100 * Exercise EXDEV in dmu_send_obj. The error gets translated to
101 * EZFS_CROSSTARGET in libzfs.
102 */
103 error = zfs_send(zhp, tosnap, fromsnap, &flags, fd, NULL, NULL, NULL);
104 if (error == 0 || libzfs_errno(zhdl) != EZFS_CROSSTARGET)
105 errx(EX_OSERR, "zfs_send(\"%s\", \"%s\") should have failed "
106 "with EZFS_CROSSTARGET, not %d",
107 tofull, fromfull, libzfs_errno(zhdl));
108 printf("zfs_send(\"%s\", \"%s\"): %s\n",
109 tofull, fromfull, libzfs_error_description(zhdl));
110
111 zfs_close(zhp);
112
113 /*
114 * Exercise EXDEV in dmu_send.
115 */
116 error = lzc_send_resume_redacted(fromfull, tofull, fd, 0, 0, 0, NULL);
117 if (error != EXDEV)
118 errx(EX_OSERR, "lzc_send_resume_redacted(\"%s\", \"%s\")"
119 " should have failed with EXDEV, not %d",
120 fromfull, tofull, error);
121 printf("lzc_send_resume_redacted(\"%s\", \"%s\"): %s\n",
122 fromfull, tofull, strerror(error));
123
124 /*
125 * Exercise EXDEV in dmu_send_estimate_fast.
126 */
127 error = lzc_send_space_resume_redacted(fromfull, tofull, 0, 0, 0, 0,
128 NULL, fd, &size);
129 if (error != EXDEV)
130 errx(EX_OSERR, "lzc_send_space_resume_redacted(\"%s\", \"%s\")"
131 " should have failed with EXDEV, not %d",
132 fromfull, tofull, error);
133 printf("lzc_send_space_resume_redacted(\"%s\", \"%s\"): %s\n",
134 fromfull, tofull, strerror(error));
135
136 close(fd);
137 libzfs_fini(zhdl);
138 free((void *)fsname);
139
140 return (EXIT_SUCCESS);
141 }
142