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 * 3. 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 mode_t mode; 77 int error = 0; 78 off_t isize; 79 struct mount *mp; 80 81 mp = NULL; 82 /* 83 * Ignore inodes related to stale file handles. 84 */ 85 if (ip->i_mode == 0) 86 goto out; 87 #ifdef UFS_GJOURNAL 88 ufs_gjournal_close(vp); 89 #endif 90 #ifdef QUOTA 91 /* 92 * Before moving off the active list, we must be sure that 93 * any modified quotas have been pushed since these will no 94 * longer be checked once the vnode is on the inactive list. 95 */ 96 qsyncvp(vp); 97 #endif 98 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 99 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) { 100 loop: 101 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) { 102 /* Cannot delete file while file system is suspended */ 103 if ((vp->v_iflag & VI_DOOMED) != 0) { 104 /* Cannot return before file is deleted */ 105 (void) vn_start_secondary_write(vp, &mp, 106 V_WAIT); 107 } else { 108 MNT_ILOCK(mp); 109 if ((mp->mnt_kern_flag & 110 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) { 111 MNT_IUNLOCK(mp); 112 goto loop; 113 } 114 /* 115 * Fail to inactivate vnode now and 116 * let ffs_snapshot() clean up after 117 * it has resumed the file system. 118 */ 119 VI_LOCK(vp); 120 vp->v_iflag |= VI_OWEINACT; 121 VI_UNLOCK(vp); 122 MNT_IUNLOCK(mp); 123 return (0); 124 } 125 } 126 } 127 isize = ip->i_size; 128 if (I_IS_UFS2(ip)) 129 isize += ip->i_din2->di_extsize; 130 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip)) 131 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, NOCRED); 132 if (ip->i_nlink <= 0 && ip->i_mode && !UFS_RDONLY(ip)) { 133 #ifdef QUOTA 134 if (!getinoquota(ip)) 135 (void)chkiq(ip, -1, NOCRED, FORCE); 136 #endif 137 #ifdef UFS_EXTATTR 138 ufs_extattr_vnode_inactive(vp, ap->a_td); 139 #endif 140 /* 141 * Setting the mode to zero needs to wait for the inode 142 * to be written just as does a change to the link count. 143 * So, rather than creating a new entry point to do the 144 * same thing, we just use softdep_change_linkcnt(). 145 */ 146 DIP_SET(ip, i_rdev, 0); 147 mode = ip->i_mode; 148 ip->i_mode = 0; 149 DIP_SET(ip, i_mode, 0); 150 ip->i_flag |= IN_CHANGE | IN_UPDATE; 151 if (DOINGSOFTDEP(vp)) 152 softdep_change_linkcnt(ip); 153 UFS_VFREE(vp, ip->i_number, mode); 154 } 155 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) { 156 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 157 mp == NULL && 158 vn_start_secondary_write(vp, &mp, V_NOWAIT)) { 159 mp = NULL; 160 ip->i_flag &= ~IN_ACCESS; 161 } else { 162 if (mp == NULL) 163 (void) vn_start_secondary_write(vp, &mp, 164 V_WAIT); 165 UFS_UPDATE(vp, 0); 166 } 167 } 168 out: 169 /* 170 * If we are done with the inode, reclaim it 171 * so that it can be reused immediately. 172 */ 173 if (ip->i_mode == 0) 174 vrecycle(vp); 175 if (mp != NULL) 176 vn_finished_secondary_write(mp); 177 return (error); 178 } 179 180 void 181 ufs_prepare_reclaim(struct vnode *vp) 182 { 183 struct inode *ip; 184 #ifdef QUOTA 185 int i; 186 #endif 187 188 ip = VTOI(vp); 189 190 vnode_destroy_vobject(vp); 191 #ifdef QUOTA 192 for (i = 0; i < MAXQUOTAS; i++) { 193 if (ip->i_dquot[i] != NODQUOT) { 194 dqrele(vp, ip->i_dquot[i]); 195 ip->i_dquot[i] = NODQUOT; 196 } 197 } 198 #endif 199 #ifdef UFS_DIRHASH 200 if (ip->i_dirhash != NULL) 201 ufsdirhash_free(ip); 202 #endif 203 } 204 205 /* 206 * Reclaim an inode so that it can be used for other purposes. 207 */ 208 int 209 ufs_reclaim(ap) 210 struct vop_reclaim_args /* { 211 struct vnode *a_vp; 212 struct thread *a_td; 213 } */ *ap; 214 { 215 struct vnode *vp = ap->a_vp; 216 struct inode *ip = VTOI(vp); 217 218 ufs_prepare_reclaim(vp); 219 220 if (ip->i_flag & IN_LAZYMOD) 221 ip->i_flag |= IN_MODIFIED; 222 UFS_UPDATE(vp, 0); 223 /* 224 * Remove the inode from its hash chain. 225 */ 226 vfs_hash_remove(vp); 227 228 /* 229 * Lock the clearing of v_data so ffs_lock() can inspect it 230 * prior to obtaining the lock. 231 */ 232 VI_LOCK(vp); 233 vp->v_data = 0; 234 VI_UNLOCK(vp); 235 UFS_IFREE(ITOUMP(ip), ip); 236 return (0); 237 } 238