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/param.h>
  32 #include <sys/mount.h>
  33 #include <sys/uio.h>
  34 #include <sys/mntent.h>
  35 #include <assert.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <sys/mnttab.h>
  40 #include <sys/errno.h>
  41 #include <libzfs.h>
  42
  43 #include "../../libzfs_impl.h"
  44
  45 static void
  46 build_iovec(struct iovec **iov, int *iovlen, const char *name, void *val,
  47     size_t len)
  48 {
  49         int i;
  50
  51         if (*iovlen < 0)
  52                 return;
  53         i = *iovlen;
  54         *iov = realloc(*iov, sizeof (**iov) * (i + 2));
  55         if (*iov == NULL) {
  56                 *iovlen = -1;
  57                 return;
  58         }
  59         (*iov)[i].iov_base = strdup(name);
  60         (*iov)[i].iov_len = strlen(name) + 1;
  61         i++;
  62         (*iov)[i].iov_base = val;
  63         if (len == (size_t)-1) {
  64                 if (val != NULL)
  65                         len = strlen(val) + 1;
  66                 else
  67                         len = 0;
  68         }
  69         (*iov)[i].iov_len = (int)len;
  70         *iovlen = ++i;
  71 }
  72
  73 int
  74 do_mount(zfs_handle_t *zhp, const char *mntpt, const char *opts, int flags)
  75 {
  76         struct iovec *iov;
  77         char *optstr, *p, *tofree;
  78         int iovlen, rv;
  79         const char *spec = zfs_get_name(zhp);
  80
  81         assert(spec != NULL);
  82         assert(mntpt != NULL);
  83         assert(opts != NULL);
  84
  85         tofree = optstr = strdup(opts);
  86         assert(optstr != NULL);
  87
  88         iov = NULL;
  89         iovlen = 0;
  90         if (strstr(optstr, MNTOPT_REMOUNT) != NULL)
  91                 build_iovec(&iov, &iovlen, "update", NULL, 0);
  92         if (flags & MS_RDONLY)
  93                 build_iovec(&iov, &iovlen, "ro", NULL, 0);
  94         build_iovec(&iov, &iovlen, "fstype", __DECONST(char *, MNTTYPE_ZFS),
  95             (size_t)-1);
  96         build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, mntpt),
  97             (size_t)-1);
  98         build_iovec(&iov, &iovlen, "from", __DECONST(char *, spec), (size_t)-1);
  99         while ((p = strsep(&optstr, ",/")) != NULL)
 100                 build_iovec(&iov, &iovlen, p, NULL, (size_t)-1);
 101         rv = nmount(iov, iovlen, 0);
 102         free(tofree);
 103         if (rv < 0)
 104                 return (errno);
 105         return (rv);
 106
 107 }
 108
 109 int
 110 do_unmount(zfs_handle_t *zhp, const char *mntpt, int flags)
 111 {
 112         (void) zhp;
 113         if (unmount(mntpt, flags) < 0)
 114                 return (errno);
 115         return (0);
 116 }
 117
 118 int
 119 zfs_mount_delegation_check(void)
 120 {
 121         return (0);
 122 }
 123
 124 /* Called from the tail end of zpool_disable_datasets() */
 125 void
 126 zpool_disable_datasets_os(zpool_handle_t *zhp, boolean_t force)
 127 {
 128         (void) zhp, (void) force;
 129 }
 130
 131 /* Called from the tail end of zfs_unmount() */
 132 void
 133 zpool_disable_volume_os(const char *name)
 134 {
 135         (void) name;
 136 }