1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 #include <sys/types.h> 38 #include <sys/t_lock.h> 39 #include <sys/param.h> 40 #include <sys/errno.h> 41 #include <sys/user.h> 42 #include <sys/fstyp.h> 43 #include <sys/kmem.h> 44 #include <sys/systm.h> 45 #include <sys/mount.h> 46 #include <sys/vfs.h> 47 #include <sys/cred.h> 48 #include <sys/vnode.h> 49 #include <sys/dnlc.h> 50 #include <sys/file.h> 51 #include <sys/time.h> 52 #include <sys/cmn_err.h> 53 #include <sys/swap.h> 54 #include <sys/debug.h> 55 #include <sys/pathname.h> 56 #include <sys/cladm.h> 57 58 /* 59 * System calls. 60 */ 61 62 /* 63 * "struct mounta" defined in sys/vfs.h. 64 */ 65 66 /* ARGSUSED */ 67 int 68 mount(long *lp, rval_t *rp) 69 { 70 vnode_t *vp = NULL; 71 struct vfs *vfsp; /* dummy argument */ 72 int error; 73 struct mounta *uap; 74 #if defined(_LP64) 75 struct mounta native; 76 77 /* 78 * Make a struct mounta if we are DATAMODEL_LP64 79 */ 80 uap = &native; 81 uap->spec = (char *)*lp++; 82 uap->dir = (char *)*lp++; 83 uap->flags = (int)*lp++; 84 uap->fstype = (char *)*lp++; 85 uap->dataptr = (char *)*lp++; 86 uap->datalen = (int)*lp++; 87 uap->optptr = (char *)*lp++; 88 uap->optlen = (int)*lp++; 89 #else /* !defined(_LP64) */ 90 /* 91 * 32 bit kernels can take a shortcut and just cast 92 * the args array to the structure. 93 */ 94 uap = (struct mounta *)lp; 95 #endif /* _LP64 */ 96 /* 97 * Resolve second path name (mount point). 98 */ 99 if (error = lookupname(uap->dir, UIO_USERSPACE, FOLLOW, NULLVPP, &vp)) 100 return (set_errno(error)); 101 102 /* 103 * Some mount flags are disallowed through the system call interface. 104 */ 105 uap->flags &= MS_MASK; 106 107 if ((vp->v_flag & VPXFS) && ((uap->flags & MS_GLOBAL) != MS_GLOBAL)) { 108 /* 109 * Clustering: if we're doing a mount onto the global 110 * namespace, and the mount is not a global mount, return 111 * an error. 112 */ 113 error = ENOTSUP; 114 } else if (uap->flags & MS_GLOBAL) { 115 /* 116 * Clustering: global mount specified. 117 */ 118 if ((cluster_bootflags & CLUSTER_BOOTED) == 0) { 119 /* 120 * If we're not booted as a cluster, 121 * global mounts are not allowed. 122 */ 123 error = ENOTSUP; 124 } else { 125 error = domount("pxfs", uap, vp, CRED(), &vfsp); 126 if (!error) 127 VFS_RELE(vfsp); 128 } 129 } else { 130 error = domount(NULL, uap, vp, CRED(), &vfsp); 131 if (!error) 132 VFS_RELE(vfsp); 133 } 134 VN_RELE(vp); 135 rp->r_val2 = error; 136 return (error ? set_errno(error) : 0); 137 } 138