ufs_inode.c

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    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 }

Cache object: 47cb0ca9676760582517bd05f630172c

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FreeBSD/Linux Kernel Cross Reference sys/ufs/ufs/ufs_inode.c

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sys/ufs/ufs/ufs_inode.c