tests/zfs-tests/cmd/badsend.c

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