lib/libzfs/os/freebsd/libzfs_zmount.c

   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 }