1/*- 2 * Copyright (c) 1991, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)ufs_inode.c 8.9 (Berkeley) 5/14/95 35 */ 36 37#include <sys/cdefs.h> 38__FBSDID("$FreeBSD$"); 39 40#include "opt_quota.h" 41#include "opt_ufs.h" 42 43#include <sys/param.h> 44#include <sys/systm.h> 45#include <sys/vnode.h> 46#include <sys/lock.h> 47#include <sys/mount.h> 48#include <sys/malloc.h> 49#include <sys/mutex.h> 50 51#include <ufs/ufs/extattr.h> 52#include <ufs/ufs/quota.h> 53#include <ufs/ufs/inode.h> 54#include <ufs/ufs/ufsmount.h> 55#include <ufs/ufs/ufs_extern.h> 56#ifdef UFS_DIRHASH 57#include <ufs/ufs/dir.h> 58#include <ufs/ufs/dirhash.h> 59#endif 60#ifdef UFS_GJOURNAL 61#include <ufs/ufs/gjournal.h> 62#endif 63 64/* 65 * Last reference to an inode. If necessary, write or delete it. 66 */ 67int 68ufs_inactive(ap) 69 struct vop_inactive_args /* { 70 struct vnode *a_vp; 71 struct thread *a_td; 72 } */ *ap; 73{ 74 struct vnode *vp = ap->a_vp; 75 struct inode *ip = VTOI(vp); 76 struct thread *td = ap->a_td; 77 mode_t mode; 78 int error = 0; 79 off_t isize; 80 struct mount *mp; 81 82 mp = NULL; 83 /* 84 * Ignore inodes related to stale file handles. 85 */ 86 if (ip->i_mode == 0) 87 goto out; 88#ifdef UFS_GJOURNAL 89 ufs_gjournal_close(vp); 90#endif 91#ifdef QUOTA 92 /* 93 * Before moving off the active list, we must be sure that 94 * any modified quotas have been pushed since these will no 95 * longer be checked once the vnode is on the inactive list. 96 */ 97 qsyncvp(vp); 98#endif 99 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 100 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) { 101 loop: 102 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) { 103 /* Cannot delete file while file system is suspended */ 104 if ((vp->v_iflag & VI_DOOMED) != 0) { 105 /* Cannot return before file is deleted */ 106 (void) vn_start_secondary_write(vp, &mp, 107 V_WAIT); 108 } else { 109 MNT_ILOCK(mp); 110 if ((mp->mnt_kern_flag & 111 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) { 112 MNT_IUNLOCK(mp); 113 goto loop; 114 } 115 /* 116 * Fail to inactivate vnode now and 117 * let ffs_snapshot() clean up after 118 * it has resumed the file system. 119 */ 120 VI_LOCK(vp); 121 vp->v_iflag |= VI_OWEINACT; 122 VI_UNLOCK(vp); 123 MNT_IUNLOCK(mp); 124 return (0); 125 } 126 } 127 } 128 isize = ip->i_size; 129 if (ip->i_ump->um_fstype == UFS2) 130 isize += ip->i_din2->di_extsize; 131 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip)) 132 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, 133 NOCRED, td); 134 if (ip->i_nlink <= 0 && ip->i_mode && !UFS_RDONLY(ip)) { 135#ifdef QUOTA 136 if (!getinoquota(ip)) 137 (void)chkiq(ip, -1, NOCRED, FORCE); 138#endif 139#ifdef UFS_EXTATTR 140 ufs_extattr_vnode_inactive(vp, td); 141#endif 142 /* 143 * Setting the mode to zero needs to wait for the inode 144 * to be written just as does a change to the link count. 145 * So, rather than creating a new entry point to do the 146 * same thing, we just use softdep_change_linkcnt(). 147 */ 148 DIP_SET(ip, i_rdev, 0); 149 mode = ip->i_mode; 150 ip->i_mode = 0; 151 DIP_SET(ip, i_mode, 0); 152 ip->i_flag |= IN_CHANGE | IN_UPDATE; 153 if (DOINGSOFTDEP(vp)) 154 softdep_change_linkcnt(ip); 155 UFS_VFREE(vp, ip->i_number, mode); 156 } 157 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) { 158 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 159 mp == NULL && 160 vn_start_secondary_write(vp, &mp, V_NOWAIT)) { 161 mp = NULL; 162 ip->i_flag &= ~IN_ACCESS; 163 } else { 164 if (mp == NULL) 165 (void) vn_start_secondary_write(vp, &mp, 166 V_WAIT); 167 UFS_UPDATE(vp, 0); 168 } 169 } 170out: 171 /* 172 * If we are done with the inode, reclaim it 173 * so that it can be reused immediately. 174 */ 175 if (ip->i_mode == 0) 176 vrecycle(vp, td); 177 if (mp != NULL) 178 vn_finished_secondary_write(mp); 179 return (error); 180} 181 182void 183ufs_prepare_reclaim(struct vnode *vp) 184{ 185 struct inode *ip; 186#ifdef QUOTA 187 int i; 188#endif 189 190 ip = VTOI(vp); 191 192 vnode_destroy_vobject(vp); 193#ifdef QUOTA 194 for (i = 0; i < MAXQUOTAS; i++) { 195 if (ip->i_dquot[i] != NODQUOT) { 196 dqrele(vp, ip->i_dquot[i]); 197 ip->i_dquot[i] = NODQUOT; 198 } 199 } 200#endif 201#ifdef UFS_DIRHASH 202 if (ip->i_dirhash != NULL) 203 ufsdirhash_free(ip); 204#endif 205} 206 207/* 208 * Reclaim an inode so that it can be used for other purposes. 209 */ 210int 211ufs_reclaim(ap) 212 struct vop_reclaim_args /* { 213 struct vnode *a_vp; 214 struct thread *a_td; 215 } */ *ap; 216{ 217 struct vnode *vp = ap->a_vp; 218 struct inode *ip = VTOI(vp); 219 struct ufsmount *ump = ip->i_ump; 220 221 ufs_prepare_reclaim(vp); 222 223 if (ip->i_flag & IN_LAZYMOD) 224 ip->i_flag |= IN_MODIFIED; 225 UFS_UPDATE(vp, 0); 226 /* 227 * Remove the inode from its hash chain. 228 */ 229 vfs_hash_remove(vp); 230 231 /* 232 * Lock the clearing of v_data so ffs_lock() can inspect it 233 * prior to obtaining the lock. 234 */ 235 VI_LOCK(vp); 236 vp->v_data = 0; 237 VI_UNLOCK(vp); 238 UFS_IFREE(ump, ip); 239 return (0); 240} 241