libzfs_zmount.c

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    1 /*
    2  * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 /*
   28  * This file implements Solaris compatible zmount() function.
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD$");
   33 
   34 #include <sys/param.h>
   35 #include <sys/mount.h>
   36 #include <sys/uio.h>
   37 #include <sys/mntent.h>
   38 #include <assert.h>
   39 #include <stdio.h>
   40 #include <stdlib.h>
   41 #include <string.h>
   42 #include <sys/mnttab.h>
   43 #include <sys/errno.h>
   44 #include <libzfs.h>
   45 
   46 #include "../../libzfs_impl.h"
   47 
   48 static void
   49 build_iovec(struct iovec **iov, int *iovlen, const char *name, void *val,
   50     size_t len)
   51 {
   52         int i;
   53 
   54         if (*iovlen < 0)
   55                 return;
   56         i = *iovlen;
   57         *iov = realloc(*iov, sizeof (**iov) * (i + 2));
   58         if (*iov == NULL) {
   59                 *iovlen = -1;
   60                 return;
   61         }
   62         (*iov)[i].iov_base = strdup(name);
   63         (*iov)[i].iov_len = strlen(name) + 1;
   64         i++;
   65         (*iov)[i].iov_base = val;
   66         if (len == (size_t)-1) {
   67                 if (val != NULL)
   68                         len = strlen(val) + 1;
   69                 else
   70                         len = 0;
   71         }
   72         (*iov)[i].iov_len = (int)len;
   73         *iovlen = ++i;
   74 }
   75 
   76 int
   77 do_mount(zfs_handle_t *zhp, const char *mntpt, const char *opts, int flags)
   78 {
   79         struct iovec *iov;
   80         char *optstr, *p, *tofree;
   81         int iovlen, rv;
   82         const char *spec = zfs_get_name(zhp);
   83 
   84         assert(spec != NULL);
   85         assert(mntpt != NULL);
   86         assert(opts != NULL);
   87 
   88         tofree = optstr = strdup(opts);
   89         assert(optstr != NULL);
   90 
   91         iov = NULL;
   92         iovlen = 0;
   93         if (strstr(optstr, MNTOPT_REMOUNT) != NULL)
   94                 build_iovec(&iov, &iovlen, "update", NULL, 0);
   95         if (flags & MS_RDONLY)
   96                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
   97         build_iovec(&iov, &iovlen, "fstype", __DECONST(char *, MNTTYPE_ZFS),
   98             (size_t)-1);
   99         build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, mntpt),
  100             (size_t)-1);
  101         build_iovec(&iov, &iovlen, "from", __DECONST(char *, spec), (size_t)-1);
  102         while ((p = strsep(&optstr, ",/")) != NULL)
  103                 build_iovec(&iov, &iovlen, p, NULL, (size_t)-1);
  104         rv = nmount(iov, iovlen, 0);
  105         free(tofree);
  106         if (rv < 0)
  107                 return (errno);
  108         return (rv);
  109 
  110 }
  111 
  112 int
  113 do_unmount(zfs_handle_t *zhp, const char *mntpt, int flags)
  114 {
  115         (void) zhp;
  116         if (unmount(mntpt, flags) < 0)
  117                 return (errno);
  118         return (0);
  119 }
  120 
  121 int
  122 zfs_mount_delegation_check(void)
  123 {
  124         return (0);
  125 }
  126 
  127 /* Called from the tail end of zpool_disable_datasets() */
  128 void
  129 zpool_disable_datasets_os(zpool_handle_t *zhp, boolean_t force)
  130 {
  131         (void) zhp, (void) force;
  132 }
  133 
  134 /* Called from the tail end of zfs_unmount() */
  135 void
  136 zpool_disable_volume_os(const char *name)
  137 {
  138         (void) name;
  139 }

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/lib/libzfs/os/freebsd/libzfs_zmount.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/lib/libzfs/os/freebsd/libzfs_zmount.c