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