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
build_iovec(struct iovec ** iov,int * iovlen,const char * name,void * val,size_t len)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
do_mount(zfs_handle_t * zhp,const char * mntpt,const char * opts,int flags)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
do_unmount(zfs_handle_t * zhp,const char * mntpt,int flags)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
zfs_mount_delegation_check(void)119 zfs_mount_delegation_check(void)
120 {
121 return (0);
122 }
123
124 /* Called from the tail end of zpool_disable_datasets() */
125 void
zpool_disable_datasets_os(zpool_handle_t * zhp,boolean_t force)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
zpool_disable_volume_os(const char * name)133 zpool_disable_volume_os(const char *name)
134 {
135 (void) name;
136 }
137