1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993, 1995 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)ufs_inode.c 8.9 (Berkeley) 5/14/95 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include "opt_quota.h" 43 #include "opt_ufs.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/vnode.h> 48 #include <sys/lock.h> 49 #include <sys/mount.h> 50 #include <sys/malloc.h> 51 #include <sys/mutex.h> 52 53 #include <ufs/ufs/extattr.h> 54 #include <ufs/ufs/quota.h> 55 #include <ufs/ufs/inode.h> 56 #include <ufs/ufs/ufsmount.h> 57 #include <ufs/ufs/ufs_extern.h> 58 #ifdef UFS_DIRHASH 59 #include <ufs/ufs/dir.h> 60 #include <ufs/ufs/dirhash.h> 61 #endif 62 #ifdef UFS_GJOURNAL 63 #include <ufs/ufs/gjournal.h> 64 #endif 65 66 int 67 ufs_need_inactive(struct vop_need_inactive_args *ap) 68 { 69 struct vnode *vp; 70 struct inode *ip; 71 #ifdef QUOTA 72 int i; 73 #endif 74 75 vp = ap->a_vp; 76 ip = VTOI(vp); 77 if (UFS_RDONLY(ip)) 78 return (0); 79 if (vn_need_pageq_flush(vp)) 80 return (1); 81 if (ip->i_mode == 0 || ip->i_nlink <= 0 || 82 (ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 83 (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 84 IN_UPDATE)) != 0 || 85 (ip->i_effnlink <= 0 && (ip->i_size != 0 || (I_IS_UFS2(ip) && 86 ip->i_din2->di_extsize != 0)))) 87 return (1); 88 #ifdef QUOTA 89 for (i = 0; i < MAXQUOTAS; i++) { 90 if (ip->i_dquot[i] != NULL) 91 return (1); 92 } 93 #endif 94 /* 95 * No need to check ufs_gjournal_close() condition since we 96 * return 1 if only i_nlink <= 0. 97 */ 98 return (0); 99 } 100 101 /* 102 * Last reference to an inode. If necessary, write or delete it. 103 */ 104 int 105 ufs_inactive( 106 struct vop_inactive_args /* { 107 struct vnode *a_vp; 108 } */ *ap) 109 { 110 struct vnode *vp = ap->a_vp; 111 struct inode *ip = VTOI(vp); 112 mode_t mode; 113 int error = 0; 114 off_t isize; 115 struct mount *mp; 116 117 mp = NULL; 118 /* 119 * Ignore inodes related to stale file handles. 120 */ 121 if (ip->i_mode == 0) 122 goto out; 123 #ifdef UFS_GJOURNAL 124 ufs_gjournal_close(vp); 125 #endif 126 #ifdef QUOTA 127 /* 128 * Before moving off the active list, we must be sure that 129 * any modified quotas have been pushed since these will no 130 * longer be checked once the vnode is on the inactive list. 131 */ 132 qsyncvp(vp); 133 #endif 134 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 135 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) { 136 loop: 137 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) { 138 /* Cannot delete file while file system is suspended */ 139 if (VN_IS_DOOMED(vp)) { 140 /* Cannot return before file is deleted */ 141 (void) vn_start_secondary_write(vp, &mp, 142 V_WAIT); 143 } else { 144 MNT_ILOCK(mp); 145 if ((mp->mnt_kern_flag & 146 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) { 147 MNT_IUNLOCK(mp); 148 goto loop; 149 } 150 /* 151 * Fail to inactivate vnode now and 152 * let ffs_snapshot() clean up after 153 * it has resumed the file system. 154 */ 155 VI_LOCK(vp); 156 vp->v_iflag |= VI_OWEINACT; 157 VI_UNLOCK(vp); 158 MNT_IUNLOCK(mp); 159 return (0); 160 } 161 } 162 } 163 isize = ip->i_size; 164 if (I_IS_UFS2(ip)) 165 isize += ip->i_din2->di_extsize; 166 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip)) 167 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, NOCRED); 168 if (ip->i_nlink <= 0 && ip->i_mode != 0 && !UFS_RDONLY(ip) && 169 (vp->v_iflag & VI_OWEINACT) == 0) { 170 #ifdef QUOTA 171 if (!getinoquota(ip)) 172 (void)chkiq(ip, -1, NOCRED, FORCE); 173 #endif 174 #ifdef UFS_EXTATTR 175 ufs_extattr_vnode_inactive(vp); 176 #endif 177 /* 178 * Setting the mode to zero needs to wait for the inode 179 * to be written just as does a change to the link count. 180 * So, rather than creating a new entry point to do the 181 * same thing, we just use softdep_change_linkcnt(). 182 */ 183 DIP_SET(ip, i_rdev, 0); 184 mode = ip->i_mode; 185 ip->i_mode = 0; 186 DIP_SET(ip, i_mode, 0); 187 UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE); 188 if (DOINGSOFTDEP(vp)) 189 softdep_change_linkcnt(ip); 190 UFS_VFREE(vp, ip->i_number, mode); 191 } 192 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) { 193 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 194 mp == NULL && 195 vn_start_secondary_write(vp, &mp, V_NOWAIT)) { 196 mp = NULL; 197 ip->i_flag &= ~IN_ACCESS; 198 } else { 199 if (mp == NULL) 200 (void) vn_start_secondary_write(vp, &mp, 201 V_WAIT); 202 UFS_UPDATE(vp, 0); 203 } 204 } 205 out: 206 /* 207 * If we are done with the inode, reclaim it 208 * so that it can be reused immediately. 209 */ 210 if (ip->i_mode == 0 && (vp->v_iflag & VI_OWEINACT) == 0) 211 vrecycle(vp); 212 if (mp != NULL) 213 vn_finished_secondary_write(mp); 214 return (error); 215 } 216 217 /* 218 * Reclaim an inode so that it can be used for other purposes. 219 */ 220 int 221 ufs_reclaim( 222 struct vop_reclaim_args /* { 223 struct vnode *a_vp; 224 } */ *ap) 225 { 226 struct vnode *vp = ap->a_vp; 227 struct inode *ip = VTOI(vp); 228 #ifdef QUOTA 229 int i; 230 231 for (i = 0; i < MAXQUOTAS; i++) { 232 if (ip->i_dquot[i] != NODQUOT) { 233 dqrele(vp, ip->i_dquot[i]); 234 ip->i_dquot[i] = NODQUOT; 235 } 236 } 237 #endif 238 #ifdef UFS_DIRHASH 239 if (ip->i_dirhash != NULL) 240 ufsdirhash_free(ip); 241 #endif 242 243 if (ip->i_flag & IN_LAZYMOD) 244 UFS_INODE_SET_FLAG(ip, IN_MODIFIED); 245 UFS_UPDATE(vp, 0); 246 /* 247 * Remove the inode from its hash chain. 248 */ 249 vfs_hash_remove(vp); 250 251 /* 252 * Lock the clearing of v_data so ffs_lock() can inspect it 253 * prior to obtaining the lock. 254 */ 255 VI_LOCK(vp); 256 vp->v_data = 0; 257 VI_UNLOCK(vp); 258 UFS_IFREE(ITOUMP(ip), ip); 259 return (0); 260 } 261