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 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 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 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 120 zfs_mount_delegation_check(void) 121 { 122 return (0); 123 } 124 125 /* Called from the tail end of zpool_disable_datasets() */ 126 void 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 134 zpool_disable_volume_os(const char *name) 135 { 136 (void) name; 137 } 138