Annotation of sys/ufs/ufs/ufs_vfsops.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ufs_vfsops.c,v 1.15 2006/04/04 11:21:40 pedro Exp $ */
! 2: /* $NetBSD: ufs_vfsops.c,v 1.4 1996/02/09 22:36:12 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1991, 1993, 1994
! 6: * The Regents of the University of California. All rights reserved.
! 7: * (c) UNIX System Laboratories, Inc.
! 8: * All or some portions of this file are derived from material licensed
! 9: * to the University of California by American Telephone and Telegraph
! 10: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 11: * the permission of UNIX System Laboratories, Inc.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * @(#)ufs_vfsops.c 8.4 (Berkeley) 4/16/94
! 38: */
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/mbuf.h>
! 42: #include <sys/mount.h>
! 43: #include <sys/proc.h>
! 44: #include <sys/buf.h>
! 45: #include <sys/vnode.h>
! 46: #include <sys/malloc.h>
! 47:
! 48: #include <miscfs/specfs/specdev.h>
! 49:
! 50: #include <ufs/ufs/quota.h>
! 51: #include <ufs/ufs/inode.h>
! 52: #include <ufs/ufs/ufsmount.h>
! 53: #include <ufs/ufs/ufs_extern.h>
! 54: #ifdef UFS_DIRHASH
! 55: #include <ufs/ufs/dir.h>
! 56: #include <ufs/ufs/dirhash.h>
! 57: #endif
! 58:
! 59: /*
! 60: * Make a filesystem operational.
! 61: * Nothing to do at the moment.
! 62: */
! 63: /* ARGSUSED */
! 64: int
! 65: ufs_start(struct mount *mp, int flags, struct proc *p)
! 66: {
! 67: return (0);
! 68: }
! 69:
! 70: /*
! 71: * Return the root of a filesystem.
! 72: */
! 73: int
! 74: ufs_root(struct mount *mp, struct vnode **vpp)
! 75: {
! 76: struct vnode *nvp;
! 77: int error;
! 78:
! 79: if ((error = VFS_VGET(mp, (ino_t)ROOTINO, &nvp)) != 0)
! 80: return (error);
! 81: *vpp = nvp;
! 82: return (0);
! 83: }
! 84:
! 85: /*
! 86: * Verify a remote client has export rights and return these rights via.
! 87: * exflagsp and credanonp.
! 88: */
! 89: int
! 90: ufs_check_export(struct mount *mp, struct mbuf *nam, int *exflagsp,
! 91: struct ucred **credanonp)
! 92: {
! 93: struct netcred *np;
! 94: struct ufsmount *ump = VFSTOUFS(mp);
! 95:
! 96: /*
! 97: * Get the export permission structure for this <mp, client> tuple.
! 98: */
! 99: np = vfs_export_lookup(mp, &ump->um_export, nam);
! 100: if (np == NULL)
! 101: return (EACCES);
! 102:
! 103: *exflagsp = np->netc_exflags;
! 104: *credanonp = &np->netc_anon;
! 105: return (0);
! 106: }
! 107:
! 108: /*
! 109: * Initialize UFS file systems, done only once.
! 110: */
! 111: int
! 112: ufs_init(struct vfsconf *vfsp)
! 113: {
! 114: static int done;
! 115:
! 116: if (done)
! 117: return (0);
! 118: done = 1;
! 119: ufs_ihashinit();
! 120: ufs_quota_init();
! 121: #ifdef UFS_DIRHASH
! 122: ufsdirhash_init();
! 123: #endif
! 124:
! 125: return (0);
! 126: }
! 127:
! 128: /*
! 129: * This is the generic part of fhtovp called after the underlying
! 130: * filesystem has validated the file handle.
! 131: */
! 132: int
! 133: ufs_fhtovp(struct mount *mp, struct ufid *ufhp, struct vnode **vpp)
! 134: {
! 135: struct inode *ip;
! 136: struct vnode *nvp;
! 137: int error;
! 138:
! 139: if ((error = VFS_VGET(mp, ufhp->ufid_ino, &nvp)) != 0) {
! 140: *vpp = NULLVP;
! 141: return (error);
! 142: }
! 143: ip = VTOI(nvp);
! 144: if (DIP(ip, mode) == 0 || DIP(ip, gen) != ufhp->ufid_gen) {
! 145: vput(nvp);
! 146: *vpp = NULLVP;
! 147: return (ESTALE);
! 148: }
! 149: *vpp = nvp;
! 150: return (0);
! 151: }
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