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(ap) 68 struct vop_need_inactive_args *ap; 69 { 70 struct vnode *vp; 71 struct inode *ip; 72 #ifdef QUOTA 73 int i; 74 #endif 75 76 vp = ap->a_vp; 77 ip = VTOI(vp); 78 if (UFS_RDONLY(ip)) 79 return (0); 80 if (vn_need_pageq_flush(vp)) 81 return (1); 82 if (ip->i_mode == 0 || ip->i_nlink <= 0 || 83 (ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 84 (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | 85 IN_UPDATE)) != 0 || 86 (ip->i_effnlink <= 0 && (ip->i_size != 0 || (I_IS_UFS2(ip) && 87 ip->i_din2->di_extsize != 0)))) 88 return (1); 89 #ifdef QUOTA 90 for (i = 0; i < MAXQUOTAS; i++) { 91 if (ip->i_dquot[i] != NULL) 92 return (1); 93 } 94 #endif 95 /* 96 * No need to check ufs_gjournal_close() condition since we 97 * return 1 if only i_nlink <= 0. 98 */ 99 return (0); 100 } 101 102 /* 103 * Last reference to an inode. If necessary, write or delete it. 104 */ 105 int 106 ufs_inactive(ap) 107 struct vop_inactive_args /* { 108 struct vnode *a_vp; 109 } */ *ap; 110 { 111 struct vnode *vp = ap->a_vp; 112 struct inode *ip = VTOI(vp); 113 mode_t mode; 114 int error = 0; 115 off_t isize; 116 struct mount *mp; 117 118 mp = NULL; 119 /* 120 * Ignore inodes related to stale file handles. 121 */ 122 if (ip->i_mode == 0) 123 goto out; 124 #ifdef UFS_GJOURNAL 125 ufs_gjournal_close(vp); 126 #endif 127 #ifdef QUOTA 128 /* 129 * Before moving off the active list, we must be sure that 130 * any modified quotas have been pushed since these will no 131 * longer be checked once the vnode is on the inactive list. 132 */ 133 qsyncvp(vp); 134 #endif 135 if ((ip->i_effnlink == 0 && DOINGSOFTDEP(vp)) || 136 (ip->i_nlink <= 0 && !UFS_RDONLY(ip))) { 137 loop: 138 if (vn_start_secondary_write(vp, &mp, V_NOWAIT) != 0) { 139 /* Cannot delete file while file system is suspended */ 140 if (VN_IS_DOOMED(vp)) { 141 /* Cannot return before file is deleted */ 142 (void) vn_start_secondary_write(vp, &mp, 143 V_WAIT); 144 } else { 145 MNT_ILOCK(mp); 146 if ((mp->mnt_kern_flag & 147 (MNTK_SUSPEND2 | MNTK_SUSPENDED)) == 0) { 148 MNT_IUNLOCK(mp); 149 goto loop; 150 } 151 /* 152 * Fail to inactivate vnode now and 153 * let ffs_snapshot() clean up after 154 * it has resumed the file system. 155 */ 156 VI_LOCK(vp); 157 vp->v_iflag |= VI_OWEINACT; 158 VI_UNLOCK(vp); 159 MNT_IUNLOCK(mp); 160 return (0); 161 } 162 } 163 } 164 isize = ip->i_size; 165 if (I_IS_UFS2(ip)) 166 isize += ip->i_din2->di_extsize; 167 if (ip->i_effnlink <= 0 && isize && !UFS_RDONLY(ip)) 168 error = UFS_TRUNCATE(vp, (off_t)0, IO_EXT | IO_NORMAL, NOCRED); 169 if (ip->i_nlink <= 0 && ip->i_mode != 0 && !UFS_RDONLY(ip) && 170 (vp->v_iflag & VI_OWEINACT) == 0) { 171 #ifdef QUOTA 172 if (!getinoquota(ip)) 173 (void)chkiq(ip, -1, NOCRED, FORCE); 174 #endif 175 #ifdef UFS_EXTATTR 176 ufs_extattr_vnode_inactive(vp); 177 #endif 178 /* 179 * Setting the mode to zero needs to wait for the inode 180 * to be written just as does a change to the link count. 181 * So, rather than creating a new entry point to do the 182 * same thing, we just use softdep_change_linkcnt(). 183 */ 184 DIP_SET(ip, i_rdev, 0); 185 mode = ip->i_mode; 186 ip->i_mode = 0; 187 DIP_SET(ip, i_mode, 0); 188 UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_UPDATE); 189 if (DOINGSOFTDEP(vp)) 190 softdep_change_linkcnt(ip); 191 UFS_VFREE(vp, ip->i_number, mode); 192 } 193 if (ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) { 194 if ((ip->i_flag & (IN_CHANGE | IN_UPDATE | IN_MODIFIED)) == 0 && 195 mp == NULL && 196 vn_start_secondary_write(vp, &mp, V_NOWAIT)) { 197 mp = NULL; 198 ip->i_flag &= ~IN_ACCESS; 199 } else { 200 if (mp == NULL) 201 (void) vn_start_secondary_write(vp, &mp, 202 V_WAIT); 203 UFS_UPDATE(vp, 0); 204 } 205 } 206 out: 207 /* 208 * If we are done with the inode, reclaim it 209 * so that it can be reused immediately. 210 */ 211 if (ip->i_mode == 0 && (vp->v_iflag & VI_OWEINACT) == 0) 212 vrecycle(vp); 213 if (mp != NULL) 214 vn_finished_secondary_write(mp); 215 return (error); 216 } 217 218 /* 219 * Reclaim an inode so that it can be used for other purposes. 220 */ 221 int 222 ufs_reclaim(ap) 223 struct vop_reclaim_args /* { 224 struct vnode *a_vp; 225 } */ *ap; 226 { 227 struct vnode *vp = ap->a_vp; 228 struct inode *ip = VTOI(vp); 229 #ifdef QUOTA 230 int i; 231 232 for (i = 0; i < MAXQUOTAS; i++) { 233 if (ip->i_dquot[i] != NODQUOT) { 234 dqrele(vp, ip->i_dquot[i]); 235 ip->i_dquot[i] = NODQUOT; 236 } 237 } 238 #endif 239 #ifdef UFS_DIRHASH 240 if (ip->i_dirhash != NULL) 241 ufsdirhash_free(ip); 242 #endif 243 244 if (ip->i_flag & IN_LAZYMOD) 245 UFS_INODE_SET_FLAG(ip, IN_MODIFIED); 246 UFS_UPDATE(vp, 0); 247 /* 248 * Remove the inode from its hash chain. 249 */ 250 vfs_hash_remove(vp); 251 252 /* 253 * Lock the clearing of v_data so ffs_lock() can inspect it 254 * prior to obtaining the lock. 255 */ 256 VI_LOCK(vp); 257 vp->v_data = 0; 258 VI_UNLOCK(vp); 259 UFS_IFREE(ITOUMP(ip), ip); 260 return (0); 261 } 262