FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/tests/zfs-tests/cmd/badsend.c

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    
    /*
     * Portions Copyright 2020 iXsystems, Inc.
     */
    
    /*
     * Test some invalid send operations with libzfs/libzfs_core.
     *
     * Specifying the to and from snaps in the wrong order should return EXDEV.
     * We are checking that the early return doesn't accidentally leave any
     * references held, so this test is designed to trigger a panic when asserts
     * are verified with the bug present.
     */
    
    #include <libzfs.h>
    #include <libzfs_core.h>
    
    #include <fcntl.h>
    #include <stdlib.h>
    #include <string.h>
    #include <unistd.h>
    #include <sysexits.h>
    #include <err.h>
    
    static void
    usage(const char *name)
    {
            fprintf(stderr, "usage: %s snap0 snap1\n", name);
            exit(EX_USAGE);
    }
    
    int
    main(int argc, char const * const argv[])
    {
            sendflags_t flags = { 0 };
            libzfs_handle_t *zhdl;
            zfs_handle_t *zhp;
            const char *fromfull, *tofull, *fsname, *fromsnap, *tosnap, *p;
            uint64_t size;
            int fd, error;
    
            if (argc != 3)
                    usage(argv[0]);
    
            fromfull = argv[1];
            tofull = argv[2];
    
            p = strchr(fromfull, '@');
            if (p == NULL)
                    usage(argv[0]);
            fromsnap = p + 1;
    
            p = strchr(tofull, '@');
            if (p == NULL)
                    usage(argv[0]);
            tosnap = p + 1;
    
            fsname = strndup(tofull, p - tofull);
            if (fsname == NULL) {
                    perror("strndup");
                    exit(EXIT_FAILURE);
            }
            if (strncmp(fsname, fromfull, p - tofull) != 0)
                    usage(argv[0]);
    
            fd = open("/dev/null", O_WRONLY);
            if (fd == -1)
                    err(EX_OSERR, "open(\"/dev/null\", O_WRONLY)");
    
            zhdl = libzfs_init();
            if (zhdl == NULL)
                    errx(EX_OSERR, "libzfs_init(): %s", libzfs_error_init(errno));
    
            zhp = zfs_open(zhdl, fsname, ZFS_TYPE_FILESYSTEM);
            if (zhp == NULL)
                    err(EX_OSERR, "zfs_open(\"%s\")", fsname);
    
            /*
             * Exercise EXDEV in dmu_send_obj.  The error gets translated to
            * EZFS_CROSSTARGET in libzfs.
            */
           error = zfs_send(zhp, tosnap, fromsnap, &flags, fd, NULL, NULL, NULL);
           if (error == 0 || libzfs_errno(zhdl) != EZFS_CROSSTARGET)
                   errx(EX_OSERR, "zfs_send(\"%s\", \"%s\") should have failed "
                       "with EZFS_CROSSTARGET, not %d",
                       tofull, fromfull, libzfs_errno(zhdl));
           printf("zfs_send(\"%s\", \"%s\"): %s\n",
               tofull, fromfull, libzfs_error_description(zhdl));
   
           zfs_close(zhp);
   
           /*
            * Exercise EXDEV in dmu_send.
            */
           error = lzc_send_resume_redacted(fromfull, tofull, fd, 0, 0, 0, NULL);
           if (error != EXDEV)
                   errx(EX_OSERR, "lzc_send_resume_redacted(\"%s\", \"%s\")"
                       " should have failed with EXDEV, not %d",
                       fromfull, tofull, error);
           printf("lzc_send_resume_redacted(\"%s\", \"%s\"): %s\n",
               fromfull, tofull, strerror(error));
   
           /*
            * Exercise EXDEV in dmu_send_estimate_fast.
            */
           error = lzc_send_space_resume_redacted(fromfull, tofull, 0, 0, 0, 0,
               NULL, fd, &size);
           if (error != EXDEV)
                   errx(EX_OSERR, "lzc_send_space_resume_redacted(\"%s\", \"%s\")"
                       " should have failed with EXDEV, not %d",
                       fromfull, tofull, error);
           printf("lzc_send_space_resume_redacted(\"%s\", \"%s\"): %s\n",
               fromfull, tofull, strerror(error));
   
           close(fd);
           libzfs_fini(zhdl);
           free((void *)fsname);
   
           return (EXIT_SUCCESS);
   }

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