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 */ 67 int 68 ufs_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 struct mount *mp; 80 81 mp = NULL; 82 if (prtactive && vp->v_usecount != 0) 83 vprint("ufs_inactive: pushing active", vp); 84 /* 85 * Ignore inodes related to stale file handles. 86 */ 87 if (ip->i_mode == 0) 88 goto out; 89 #ifdef UFS_GJOURNAL 90 ufs_gjournal_close(vp); 91 #endif 92 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 93 (ip->i_nlink <= 0 && 94 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0)) { 95 loop: 96 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) { 97 /* Cannot delete file while file system is suspended */ 98 if ((vp->v_iflag & VI_DOOMED) != 0) { 99 /* Cannot return before file is deleted */ 100 (void) vn_start_secondary_write(vp, &mp, 101 V_WAIT); 102 } else { 103 MNT_ILOCK(mp); 104 if ((mp->mnt_kern_flag & 105 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) { 106 MNT_IUNLOCK(mp); 107 goto loop; 108 } 109 /* 110 * Fail to inactivate vnode now and 111 * let ffs_snapshot() clean up after 112 * it has resumed the file system. 113 */ 114 VI_LOCK(vp); 115 vp->v_iflag |= VI_OWEINACT; 116 VI_UNLOCK(vp); 117 MNT_IUNLOCK(mp); 118 return (0); 119 } 120 } 121 } 122 if (ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) 123 softdep_releasefile(ip); 124 if (ip->i_nlink <= 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 125 #ifdef QUOTA 126 if (!getinoquota(ip)) 127 (void)chkiq(ip, -1, NOCRED, FORCE); 128 #endif 129 #ifdef UFS_EXTATTR 130 ufs_extattr_vnode_inactive(vp, td); 131 #endif 132 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, 133 NOCRED, td); 134 /* 135 * Setting the mode to zero needs to wait for the inode 136 * to be written just as does a change to the link count. 137 * So, rather than creating a new entry point to do the 138 * same thing, we just use softdep_change_linkcnt(). 139 */ 140 DIP_SET(ip, i_rdev, 0); 141 mode = ip->i_mode; 142 ip->i_mode = 0; 143 DIP_SET(ip, i_mode, 0); 144 ip->i_flag |= IN_CHANGE | IN_UPDATE; 145 if (DOINGSOFTDEP(vp)) 146 softdep_change_linkcnt(ip); 147 UFS_VFREE(vp, ip->i_number, mode); 148 } 149 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) { 150 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 151 mp == NULL && 152 vn_start_secondary_write(vp, &mp, V_NOWAIT)) { 153 mp = NULL; 154 ip->i_flag &= ~IN_ACCESS; 155 } else { 156 if (mp == NULL) 157 (void) vn_start_secondary_write(vp, &mp, 158 V_WAIT); 159 UFS_UPDATE(vp, 0); 160 } 161 } 162 out: 163 /* 164 * If we are done with the inode, reclaim it 165 * so that it can be reused immediately. 166 */ 167 if (ip->i_mode == 0) 168 vrecycle(vp, td); 169 if (mp != NULL) 170 vn_finished_secondary_write(mp); 171 return (error); 172 } 173 174 /* 175 * Reclaim an inode so that it can be used for other purposes. 176 */ 177 int 178 ufs_reclaim(ap) 179 struct vop_reclaim_args /* { 180 struct vnode *a_vp; 181 struct thread *a_td; 182 } */ *ap; 183 { 184 struct vnode *vp = ap->a_vp; 185 struct inode *ip = VTOI(vp); 186 struct ufsmount *ump = ip->i_ump; 187 #ifdef QUOTA 188 int i; 189 #endif 190 191 if (prtactive && vp->v_usecount != 0) 192 vprint("ufs_reclaim: pushing active", vp); 193 /* 194 * Destroy the vm object and flush associated pages. 195 */ 196 vnode_destroy_vobject(vp); 197 if (ip->i_flag & IN_LAZYMOD) { 198 ip->i_flag |= IN_MODIFIED; 199 UFS_UPDATE(vp, 0); 200 } 201 /* 202 * Remove the inode from its hash chain. 203 */ 204 vfs_hash_remove(vp); 205 /* 206 * Purge old data structures associated with the inode. 207 */ 208 #ifdef QUOTA 209 for (i = 0; i < MAXQUOTAS; i++) { 210 if (ip->i_dquot[i] != NODQUOT) { 211 dqrele(vp, ip->i_dquot[i]); 212 ip->i_dquot[i] = NODQUOT; 213 } 214 } 215 #endif 216 #ifdef UFS_DIRHASH 217 if (ip->i_dirhash != NULL) 218 ufsdirhash_free(ip); 219 #endif 220 /* 221 * Lock the clearing of v_data so ffs_lock() can inspect it 222 * prior to obtaining the lock. 223 */ 224 VI_LOCK(vp); 225 vp->v_data = 0; 226 VI_UNLOCK(vp); 227 UFS_IFREE(ump, ip); 228 return (0); 229 } 230