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 static int 77 do_mount_(const char *spec, const char *dir, int mflag, char *fstype, 78 char *dataptr, int datalen, char *optptr, int optlen) 79 { 80 struct iovec *iov; 81 char *optstr, *p, *tofree; 82 int iovlen, rv; 83 84 assert(spec != NULL); 85 assert(dir != NULL); 86 assert(fstype != NULL); 87 assert(strcmp(fstype, MNTTYPE_ZFS) == 0); 88 assert(dataptr == NULL); 89 assert(datalen == 0); 90 assert(optptr != NULL); 91 assert(optlen > 0); 92 93 tofree = optstr = strdup(optptr); 94 assert(optstr != NULL); 95 96 iov = NULL; 97 iovlen = 0; 98 if (strstr(optstr, MNTOPT_REMOUNT) != NULL) 99 build_iovec(&iov, &iovlen, "update", NULL, 0); 100 if (mflag & MS_RDONLY) 101 build_iovec(&iov, &iovlen, "ro", NULL, 0); 102 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 103 build_iovec(&iov, &iovlen, "fspath", __DECONST(char *, dir), 104 (size_t)-1); 105 build_iovec(&iov, &iovlen, "from", __DECONST(char *, spec), (size_t)-1); 106 while ((p = strsep(&optstr, ",/")) != NULL) 107 build_iovec(&iov, &iovlen, p, NULL, (size_t)-1); 108 rv = nmount(iov, iovlen, 0); 109 free(tofree); 110 if (rv < 0) 111 return (errno); 112 return (rv); 113 } 114 115 int 116 do_mount(zfs_handle_t *zhp, const char *mntpt, char *opts, int flags) 117 { 118 119 return (do_mount_(zfs_get_name(zhp), mntpt, flags, MNTTYPE_ZFS, NULL, 0, 120 opts, sizeof (mntpt))); 121 } 122 123 int 124 do_unmount(zfs_handle_t *zhp, const char *mntpt, int flags) 125 { 126 if (unmount(mntpt, flags) < 0) 127 return (errno); 128 return (0); 129 } 130 131 int 132 zfs_mount_delegation_check(void) 133 { 134 return (0); 135 } 136