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Annotation of src/sys/ufs/ffs/ffs_inode.c, Revision 1.86.6.1

1.86.6.1! reinoud     1: /*     $NetBSD: ffs_inode.c,v 1.91 2007/12/08 15:23:32 ad Exp $        */
1.5       cgd         2:
1.1       mycroft     3: /*
                      4:  * Copyright (c) 1982, 1986, 1989, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
1.60      agc        15:  * 3. Neither the name of the University nor the names of its contributors
1.1       mycroft    16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  *
1.18      fvdl       31:  *     @(#)ffs_inode.c 8.13 (Berkeley) 4/21/95
1.1       mycroft    32:  */
1.46      lukem      33:
                     34: #include <sys/cdefs.h>
1.86.6.1! reinoud    35: __KERNEL_RCSID(0, "$NetBSD: ffs_inode.c,v 1.91 2007/12/08 15:23:32 ad Exp $");
1.17      mrg        36:
1.41      mrg        37: #if defined(_KERNEL_OPT)
1.25      thorpej    38: #include "opt_ffs.h"
1.20      scottr     39: #include "opt_quota.h"
1.21      scottr     40: #endif
1.1       mycroft    41:
                     42: #include <sys/param.h>
                     43: #include <sys/systm.h>
                     44: #include <sys/mount.h>
                     45: #include <sys/proc.h>
                     46: #include <sys/file.h>
                     47: #include <sys/buf.h>
                     48: #include <sys/vnode.h>
                     49: #include <sys/kernel.h>
                     50: #include <sys/malloc.h>
                     51: #include <sys/trace.h>
                     52: #include <sys/resourcevar.h>
1.81      elad       53: #include <sys/kauth.h>
1.16      mrg        54:
1.1       mycroft    55: #include <ufs/ufs/quota.h>
                     56: #include <ufs/ufs/inode.h>
                     57: #include <ufs/ufs/ufsmount.h>
                     58: #include <ufs/ufs/ufs_extern.h>
1.19      bouyer     59: #include <ufs/ufs/ufs_bswap.h>
1.1       mycroft    60:
                     61: #include <ufs/ffs/fs.h>
                     62: #include <ufs/ffs/ffs_extern.h>
                     63:
1.72      thorpej    64: static int ffs_indirtrunc(struct inode *, daddr_t, daddr_t, daddr_t, int,
                     65:                          int64_t *);
1.1       mycroft    66:
                     67: /*
1.13      tls        68:  * Update the access, modified, and inode change times as specified
                     69:  * by the IN_ACCESS, IN_UPDATE, and IN_CHANGE flags respectively.
                     70:  * The IN_MODIFIED flag is used to specify that the inode needs to be
                     71:  * updated but that the times have already been set. The access
                     72:  * and modified times are taken from the second and third parameters;
                     73:  * the inode change time is always taken from the current time. If
1.31      perseant   74:  * UPDATE_WAIT flag is set, or UPDATE_DIROP is set and we are not doing
                     75:  * softupdates, then wait for the disk write of the inode to complete.
1.1       mycroft    76:  */
1.13      tls        77:
1.1       mycroft    78: int
1.77      yamt       79: ffs_update(struct vnode *vp, const struct timespec *acc,
                     80:     const struct timespec *mod, int updflags)
1.9       christos   81: {
1.30      augustss   82:        struct fs *fs;
1.1       mycroft    83:        struct buf *bp;
                     84:        struct inode *ip;
                     85:        int error;
1.86      christos   86:        void *cp;
1.34      mycroft    87:        int waitfor, flags;
1.1       mycroft    88:
1.77      yamt       89:        if (vp->v_mount->mnt_flag & MNT_RDONLY)
1.11      mycroft    90:                return (0);
1.77      yamt       91:        ip = VTOI(vp);
                     92:        FFS_ITIMES(ip, acc, mod, NULL);
                     93:        if (updflags & UPDATE_CLOSE)
1.65      mycroft    94:                flags = ip->i_flag & (IN_MODIFIED | IN_ACCESSED);
                     95:        else
                     96:                flags = ip->i_flag & IN_MODIFIED;
1.34      mycroft    97:        if (flags == 0)
1.1       mycroft    98:                return (0);
                     99:        fs = ip->i_fs;
1.31      perseant  100:
1.35      mycroft   101:        if ((flags & IN_MODIFIED) != 0 &&
1.77      yamt      102:            (vp->v_mount->mnt_flag & MNT_ASYNC) == 0) {
                    103:                waitfor = updflags & UPDATE_WAIT;
                    104:                if ((updflags & UPDATE_DIROP) && !DOINGSOFTDEP(vp))
1.35      mycroft   105:                        waitfor |= UPDATE_WAIT;
                    106:        } else
                    107:                waitfor = 0;
1.31      perseant  108:
1.1       mycroft   109:        /*
                    110:         * Ensure that uid and gid are correct. This is a temporary
                    111:         * fix until fsck has been changed to do the update.
                    112:         */
1.55      fvdl      113:        if (fs->fs_magic == FS_UFS1_MAGIC &&                    /* XXX */
                    114:            fs->fs_old_inodefmt < FS_44INODEFMT) {              /* XXX */
                    115:                ip->i_ffs1_ouid = ip->i_uid;    /* XXX */
                    116:                ip->i_ffs1_ogid = ip->i_gid;    /* XXX */
1.18      fvdl      117:        }                                                       /* XXX */
1.9       christos  118:        error = bread(ip->i_devvp,
                    119:                      fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
                    120:                      (int)fs->fs_bsize, NOCRED, &bp);
                    121:        if (error) {
1.1       mycroft   122:                brelse(bp);
                    123:                return (error);
                    124:        }
1.35      mycroft   125:        ip->i_flag &= ~(IN_MODIFIED | IN_ACCESSED);
1.77      yamt      126:        if (DOINGSOFTDEP(vp))
1.31      perseant  127:                softdep_update_inodeblock(ip, bp, waitfor);
1.55      fvdl      128:        else if (ip->i_ffs_effnlink != ip->i_nlink)
1.29      fvdl      129:                panic("ffs_update: bad link cnt");
1.55      fvdl      130:        if (fs->fs_magic == FS_UFS1_MAGIC) {
1.86      christos  131:                cp = (char *)bp->b_data +
1.55      fvdl      132:                    (ino_to_fsbo(fs, ip->i_number) * DINODE1_SIZE);
1.23      christos  133: #ifdef FFS_EI
1.55      fvdl      134:                if (UFS_FSNEEDSWAP(fs))
                    135:                        ffs_dinode1_swap(ip->i_din.ffs1_din,
                    136:                            (struct ufs1_dinode *)cp);
                    137:                else
                    138: #endif
                    139:                        memcpy(cp, ip->i_din.ffs1_din, DINODE1_SIZE);
                    140:        } else {
1.86      christos  141:                cp = (char *)bp->b_data +
1.55      fvdl      142:                    (ino_to_fsbo(fs, ip->i_number) * DINODE2_SIZE);
                    143: #ifdef FFS_EI
                    144:                if (UFS_FSNEEDSWAP(fs))
                    145:                        ffs_dinode2_swap(ip->i_din.ffs2_din,
                    146:                            (struct ufs2_dinode *)cp);
                    147:                else
1.23      christos  148: #endif
1.55      fvdl      149:                        memcpy(cp, ip->i_din.ffs2_din, DINODE2_SIZE);
                    150:        }
1.35      mycroft   151:        if (waitfor) {
1.1       mycroft   152:                return (bwrite(bp));
1.29      fvdl      153:        } else {
1.1       mycroft   154:                bdwrite(bp);
                    155:                return (0);
                    156:        }
                    157: }
                    158:
                    159: #define        SINGLE  0       /* index of single indirect block */
                    160: #define        DOUBLE  1       /* index of double indirect block */
                    161: #define        TRIPLE  2       /* index of triple indirect block */
                    162: /*
                    163:  * Truncate the inode oip to at most length size, freeing the
                    164:  * disk blocks.
                    165:  */
1.9       christos  166: int
1.81      elad      167: ffs_truncate(struct vnode *ovp, off_t length, int ioflag, kauth_cred_t cred,
1.79      christos  168:     struct lwp *l)
1.9       christos  169: {
1.53      fvdl      170:        daddr_t lastblock;
1.68      mycroft   171:        struct inode *oip = VTOI(ovp);
1.53      fvdl      172:        daddr_t bn, lastiblock[NIADDR], indir_lbn[NIADDR];
1.64      hannken   173:        daddr_t blks[NDADDR + NIADDR];
1.30      augustss  174:        struct fs *fs;
1.85      yamt      175:        int offset, pgoffset, level;
1.55      fvdl      176:        int64_t count, blocksreleased = 0;
1.77      yamt      177:        int i, aflag, nblocks;
1.38      chs       178:        int error, allerror = 0;
1.1       mycroft   179:        off_t osize;
1.67      mycroft   180:        int sync;
1.68      mycroft   181:        struct ufsmount *ump = oip->i_ump;
1.1       mycroft   182:
1.78      yamt      183:        if (ovp->v_type == VCHR || ovp->v_type == VBLK ||
                    184:            ovp->v_type == VFIFO || ovp->v_type == VSOCK) {
                    185:                KASSERT(oip->i_size == 0);
                    186:                return 0;
                    187:        }
                    188:
1.2       pk        189:        if (length < 0)
1.3       mycroft   190:                return (EINVAL);
1.68      mycroft   191:
1.1       mycroft   192:        if (ovp->v_type == VLNK &&
1.68      mycroft   193:            (oip->i_size < ump->um_maxsymlinklen ||
                    194:             (ump->um_maxsymlinklen == 0 && DIP(oip, blocks) == 0))) {
1.38      chs       195:                KDASSERT(length == 0);
1.55      fvdl      196:                memset(SHORTLINK(oip), 0, (size_t)oip->i_size);
                    197:                oip->i_size = 0;
1.57      kristerw  198:                DIP_ASSIGN(oip, size, 0);
1.1       mycroft   199:                oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77      yamt      200:                return (ffs_update(ovp, NULL, NULL, 0));
1.1       mycroft   201:        }
1.55      fvdl      202:        if (oip->i_size == length) {
1.1       mycroft   203:                oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77      yamt      204:                return (ffs_update(ovp, NULL, NULL, 0));
1.1       mycroft   205:        }
                    206: #ifdef QUOTA
1.9       christos  207:        if ((error = getinoquota(oip)) != 0)
1.1       mycroft   208:                return (error);
                    209: #endif
                    210:        fs = oip->i_fs;
1.68      mycroft   211:        if (length > ump->um_maxfilesize)
1.38      chs       212:                return (EFBIG);
                    213:
1.63      hannken   214:        if ((oip->i_flags & SF_SNAPSHOT) != 0)
                    215:                ffs_snapremove(ovp);
                    216:
1.55      fvdl      217:        osize = oip->i_size;
1.50      chs       218:        aflag = ioflag & IO_SYNC ? B_SYNC : 0;
1.29      fvdl      219:
1.38      chs       220:        /*
                    221:         * Lengthen the size of the file. We must ensure that the
                    222:         * last byte of the file is allocated. Since the smallest
                    223:         * value of osize is 0, length will be at least 1.
                    224:         */
                    225:
                    226:        if (osize < length) {
1.48      chs       227:                if (lblkno(fs, osize) < NDADDR &&
                    228:                    lblkno(fs, osize) != lblkno(fs, length) &&
                    229:                    blkroundup(fs, osize) != osize) {
1.69      mycroft   230:                        off_t eob;
                    231:
                    232:                        eob = blkroundup(fs, osize);
                    233:                        error = ufs_balloc_range(ovp, osize, eob - osize,
1.77      yamt      234:                            cred, aflag);
1.68      mycroft   235:                        if (error)
1.48      chs       236:                                return error;
                    237:                        if (ioflag & IO_SYNC) {
1.69      mycroft   238:                                ovp->v_size = eob;
1.48      chs       239:                                simple_lock(&ovp->v_interlock);
1.49      chs       240:                                VOP_PUTPAGES(ovp,
1.69      mycroft   241:                                    trunc_page(osize & fs->fs_bmask),
                    242:                                    round_page(eob), PGO_CLEANIT | PGO_SYNCIO);
1.48      chs       243:                        }
                    244:                }
1.77      yamt      245:                error = ufs_balloc_range(ovp, length - 1, 1, cred, aflag);
1.45      chs       246:                if (error) {
1.77      yamt      247:                        (void) ffs_truncate(ovp, osize, ioflag & IO_SYNC,
1.79      christos  248:                            cred, l);
1.68      mycroft   249:                        return (error);
1.45      chs       250:                }
1.43      chs       251:                uvm_vnp_setsize(ovp, length);
1.38      chs       252:                oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.55      fvdl      253:                KASSERT(ovp->v_size == oip->i_size);
1.77      yamt      254:                return (ffs_update(ovp, NULL, NULL, 0));
1.38      chs       255:        }
                    256:
                    257:        /*
                    258:         * When truncating a regular file down to a non-block-aligned size,
                    259:         * we must zero the part of last block which is past the new EOF.
                    260:         * We must synchronously flush the zeroed pages to disk
                    261:         * since the new pages will be invalidated as soon as we
                    262:         * inform the VM system of the new, smaller size.
1.48      chs       263:         * We must do this before acquiring the GLOCK, since fetching
1.38      chs       264:         * the pages will acquire the GLOCK internally.
                    265:         * So there is a window where another thread could see a whole
                    266:         * zeroed page past EOF, but that's life.
                    267:         */
                    268:
                    269:        offset = blkoff(fs, length);
1.85      yamt      270:        pgoffset = length & PAGE_MASK;
                    271:        if (ovp->v_type == VREG && (pgoffset != 0 || offset != 0) &&
                    272:            osize > length) {
1.70      mycroft   273:                daddr_t lbn;
1.38      chs       274:                voff_t eoz;
1.85      yamt      275:                int size;
1.38      chs       276:
1.85      yamt      277:                if (offset != 0) {
                    278:                        error = ufs_balloc_range(ovp, length - 1, 1, cred,
                    279:                            aflag);
                    280:                        if (error)
                    281:                                return error;
                    282:                }
1.70      mycroft   283:                lbn = lblkno(fs, length);
                    284:                size = blksize(fs, oip, lbn);
1.85      yamt      285:                eoz = MIN(MAX(lblktosize(fs, lbn) + size, round_page(pgoffset)),
                    286:                    osize);
1.38      chs       287:                uvm_vnp_zerorange(ovp, length, eoz - length);
1.70      mycroft   288:                if (round_page(eoz) > round_page(length)) {
                    289:                        simple_lock(&ovp->v_interlock);
                    290:                        error = VOP_PUTPAGES(ovp, round_page(length),
                    291:                            round_page(eoz),
1.71      mycroft   292:                            PGO_CLEANIT | PGO_DEACTIVATE |
                    293:                            ((ioflag & IO_SYNC) ? PGO_SYNCIO : 0));
1.70      mycroft   294:                        if (error)
                    295:                                return error;
                    296:                }
1.38      chs       297:        }
                    298:
1.84      yamt      299:        genfs_node_wrlock(ovp);
1.38      chs       300:
1.29      fvdl      301:        if (DOINGSOFTDEP(ovp)) {
                    302:                if (length > 0) {
                    303:                        /*
                    304:                         * If a file is only partially truncated, then
                    305:                         * we have to clean up the data structures
                    306:                         * describing the allocation past the truncation
                    307:                         * point. Finding and deallocating those structures
                    308:                         * is a lot of work. Since partial truncation occurs
                    309:                         * rarely, we solve the problem by syncing the file
                    310:                         * so that it will have no data structures left.
                    311:                         */
1.77      yamt      312:                        if ((error = VOP_FSYNC(ovp, cred, FSYNC_WAIT,
1.79      christos  313:                            0, 0, l)) != 0) {
1.84      yamt      314:                                genfs_node_unlock(ovp);
1.29      fvdl      315:                                return (error);
1.52      simonb    316:                        }
1.86.6.1! reinoud   317:                        mutex_enter(&ump->um_lock);
1.51      fvdl      318:                        if (oip->i_flag & IN_SPACECOUNTED)
1.55      fvdl      319:                                fs->fs_pendingblocks -= DIP(oip, blocks);
1.86.6.1! reinoud   320:                        mutex_exit(&ump->um_lock);
1.29      fvdl      321:                } else {
1.40      augustss  322:                        uvm_vnp_setsize(ovp, length);
1.29      fvdl      323: #ifdef QUOTA
1.55      fvdl      324:                        (void) chkdq(oip, -DIP(oip, blocks), NOCRED, 0);
1.29      fvdl      325: #endif
1.55      fvdl      326:                        softdep_setup_freeblocks(oip, length, 0);
1.79      christos  327:                        (void) vinvalbuf(ovp, 0, cred, l, 0, 0);
1.84      yamt      328:                        genfs_node_unlock(ovp);
1.29      fvdl      329:                        oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77      yamt      330:                        return (ffs_update(ovp, NULL, NULL, 0));
1.29      fvdl      331:                }
                    332:        }
1.55      fvdl      333:        oip->i_size = length;
1.57      kristerw  334:        DIP_ASSIGN(oip, size, length);
1.18      fvdl      335:        uvm_vnp_setsize(ovp, length);
1.1       mycroft   336:        /*
                    337:         * Calculate index into inode's block list of
                    338:         * last direct and indirect blocks (if any)
                    339:         * which we want to keep.  Lastblock is -1 when
                    340:         * the file is truncated to 0.
                    341:         */
                    342:        lastblock = lblkno(fs, length + fs->fs_bsize - 1) - 1;
                    343:        lastiblock[SINGLE] = lastblock - NDADDR;
                    344:        lastiblock[DOUBLE] = lastiblock[SINGLE] - NINDIR(fs);
                    345:        lastiblock[TRIPLE] = lastiblock[DOUBLE] - NINDIR(fs) * NINDIR(fs);
                    346:        nblocks = btodb(fs->fs_bsize);
                    347:        /*
                    348:         * Update file and block pointers on disk before we start freeing
                    349:         * blocks.  If we crash before free'ing blocks below, the blocks
                    350:         * will be returned to the free list.  lastiblock values are also
                    351:         * normalized to -1 for calls to ffs_indirtrunc below.
                    352:         */
1.67      mycroft   353:        sync = 0;
1.55      fvdl      354:        for (level = TRIPLE; level >= SINGLE; level--) {
1.64      hannken   355:                blks[NDADDR + level] = DIP(oip, ib[level]);
1.67      mycroft   356:                if (lastiblock[level] < 0 && blks[NDADDR + level] != 0) {
                    357:                        sync = 1;
1.57      kristerw  358:                        DIP_ASSIGN(oip, ib[level], 0);
1.1       mycroft   359:                        lastiblock[level] = -1;
                    360:                }
1.55      fvdl      361:        }
                    362:        for (i = 0; i < NDADDR; i++) {
1.64      hannken   363:                blks[i] = DIP(oip, db[i]);
1.67      mycroft   364:                if (i > lastblock && blks[i] != 0) {
                    365:                        sync = 1;
1.57      kristerw  366:                        DIP_ASSIGN(oip, db[i], 0);
1.67      mycroft   367:                }
                    368:        }
1.68      mycroft   369:        oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.67      mycroft   370:        if (sync) {
1.77      yamt      371:                error = ffs_update(ovp, NULL, NULL, UPDATE_WAIT);
1.67      mycroft   372:                if (error && !allerror)
                    373:                        allerror = error;
1.55      fvdl      374:        }
1.32      mycroft   375:
1.1       mycroft   376:        /*
                    377:         * Having written the new inode to disk, save its new configuration
                    378:         * and put back the old block pointers long enough to process them.
                    379:         * Note that we save the new block configuration so we can check it
                    380:         * when we are done.
                    381:         */
1.55      fvdl      382:        for (i = 0; i < NDADDR; i++) {
1.64      hannken   383:                bn = DIP(oip, db[i]);
                    384:                DIP_ASSIGN(oip, db[i], blks[i]);
                    385:                blks[i] = bn;
1.55      fvdl      386:        }
                    387:        for (i = 0; i < NIADDR; i++) {
1.64      hannken   388:                bn = DIP(oip, ib[i]);
                    389:                DIP_ASSIGN(oip, ib[i], blks[NDADDR + i]);
                    390:                blks[NDADDR + i] = bn;
1.55      fvdl      391:        }
                    392:
                    393:        oip->i_size = osize;
1.57      kristerw  394:        DIP_ASSIGN(oip, size, osize);
1.32      mycroft   395:        error = vtruncbuf(ovp, lastblock + 1, 0, 0);
                    396:        if (error && !allerror)
                    397:                allerror = error;
1.1       mycroft   398:
                    399:        /*
                    400:         * Indirect blocks first.
                    401:         */
                    402:        indir_lbn[SINGLE] = -NDADDR;
                    403:        indir_lbn[DOUBLE] = indir_lbn[SINGLE] - NINDIR(fs) - 1;
                    404:        indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - NINDIR(fs) * NINDIR(fs) - 1;
                    405:        for (level = TRIPLE; level >= SINGLE; level--) {
1.55      fvdl      406:                if (oip->i_ump->um_fstype == UFS1)
                    407:                        bn = ufs_rw32(oip->i_ffs1_ib[level],UFS_FSNEEDSWAP(fs));
                    408:                else
                    409:                        bn = ufs_rw64(oip->i_ffs2_ib[level],UFS_FSNEEDSWAP(fs));
1.1       mycroft   410:                if (bn != 0) {
                    411:                        error = ffs_indirtrunc(oip, indir_lbn[level],
                    412:                            fsbtodb(fs, bn), lastiblock[level], level, &count);
                    413:                        if (error)
                    414:                                allerror = error;
                    415:                        blocksreleased += count;
                    416:                        if (lastiblock[level] < 0) {
1.57      kristerw  417:                                DIP_ASSIGN(oip, ib[level], 0);
1.63      hannken   418:                                ffs_blkfree(fs, oip->i_devvp, bn, fs->fs_bsize,
                    419:                                    oip->i_number);
1.1       mycroft   420:                                blocksreleased += nblocks;
                    421:                        }
                    422:                }
                    423:                if (lastiblock[level] >= 0)
                    424:                        goto done;
                    425:        }
                    426:
                    427:        /*
                    428:         * All whole direct blocks or frags.
                    429:         */
                    430:        for (i = NDADDR - 1; i > lastblock; i--) {
1.30      augustss  431:                long bsize;
1.1       mycroft   432:
1.55      fvdl      433:                if (oip->i_ump->um_fstype == UFS1)
                    434:                        bn = ufs_rw32(oip->i_ffs1_db[i], UFS_FSNEEDSWAP(fs));
                    435:                else
                    436:                        bn = ufs_rw64(oip->i_ffs2_db[i], UFS_FSNEEDSWAP(fs));
1.1       mycroft   437:                if (bn == 0)
                    438:                        continue;
1.57      kristerw  439:                DIP_ASSIGN(oip, db[i], 0);
1.1       mycroft   440:                bsize = blksize(fs, oip, i);
1.63      hannken   441:                ffs_blkfree(fs, oip->i_devvp, bn, bsize, oip->i_number);
1.1       mycroft   442:                blocksreleased += btodb(bsize);
                    443:        }
                    444:        if (lastblock < 0)
                    445:                goto done;
                    446:
                    447:        /*
                    448:         * Finally, look for a change in size of the
                    449:         * last direct block; release any frags.
                    450:         */
1.55      fvdl      451:        if (oip->i_ump->um_fstype == UFS1)
                    452:                bn = ufs_rw32(oip->i_ffs1_db[lastblock], UFS_FSNEEDSWAP(fs));
                    453:        else
                    454:                bn = ufs_rw64(oip->i_ffs2_db[lastblock], UFS_FSNEEDSWAP(fs));
1.1       mycroft   455:        if (bn != 0) {
                    456:                long oldspace, newspace;
                    457:
                    458:                /*
                    459:                 * Calculate amount of space we're giving
                    460:                 * back as old block size minus new block size.
                    461:                 */
                    462:                oldspace = blksize(fs, oip, lastblock);
1.55      fvdl      463:                oip->i_size = length;
1.57      kristerw  464:                DIP_ASSIGN(oip, size, length);
1.1       mycroft   465:                newspace = blksize(fs, oip, lastblock);
                    466:                if (newspace == 0)
                    467:                        panic("itrunc: newspace");
                    468:                if (oldspace - newspace > 0) {
                    469:                        /*
                    470:                         * Block number of space to be free'd is
                    471:                         * the old block # plus the number of frags
                    472:                         * required for the storage we're keeping.
                    473:                         */
                    474:                        bn += numfrags(fs, newspace);
1.63      hannken   475:                        ffs_blkfree(fs, oip->i_devvp, bn, oldspace - newspace,
                    476:                            oip->i_number);
1.1       mycroft   477:                        blocksreleased += btodb(oldspace - newspace);
                    478:                }
                    479:        }
1.32      mycroft   480:
1.1       mycroft   481: done:
                    482: #ifdef DIAGNOSTIC
                    483:        for (level = SINGLE; level <= TRIPLE; level++)
1.64      hannken   484:                if (blks[NDADDR + level] != DIP(oip, ib[level]))
1.1       mycroft   485:                        panic("itrunc1");
                    486:        for (i = 0; i < NDADDR; i++)
1.64      hannken   487:                if (blks[i] != DIP(oip, db[i]))
1.1       mycroft   488:                        panic("itrunc2");
                    489:        if (length == 0 &&
1.32      mycroft   490:            (!LIST_EMPTY(&ovp->v_cleanblkhd) || !LIST_EMPTY(&ovp->v_dirtyblkhd)))
1.1       mycroft   491:                panic("itrunc3");
                    492: #endif /* DIAGNOSTIC */
                    493:        /*
                    494:         * Put back the real size.
                    495:         */
1.55      fvdl      496:        oip->i_size = length;
1.57      kristerw  497:        DIP_ASSIGN(oip, size, length);
                    498:        DIP_ADD(oip, blocks, -blocksreleased);
1.84      yamt      499:        genfs_node_unlock(ovp);
1.1       mycroft   500:        oip->i_flag |= IN_CHANGE;
                    501: #ifdef QUOTA
                    502:        (void) chkdq(oip, -blocksreleased, NOCRED, 0);
                    503: #endif
1.55      fvdl      504:        KASSERT(ovp->v_type != VREG || ovp->v_size == oip->i_size);
1.1       mycroft   505:        return (allerror);
                    506: }
                    507:
                    508: /*
                    509:  * Release blocks associated with the inode ip and stored in the indirect
                    510:  * block bn.  Blocks are free'd in LIFO order up to (but not including)
                    511:  * lastbn.  If level is greater than SINGLE, the block is an indirect block
                    512:  * and recursive calls to indirtrunc must be used to cleanse other indirect
                    513:  * blocks.
                    514:  *
                    515:  * NB: triple indirect blocks are untested.
                    516:  */
                    517: static int
1.72      thorpej   518: ffs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn,
                    519:     int level, int64_t *countp)
1.1       mycroft   520: {
1.30      augustss  521:        int i;
1.1       mycroft   522:        struct buf *bp;
1.30      augustss  523:        struct fs *fs = ip->i_fs;
1.55      fvdl      524:        int32_t *bap1 = NULL;
                    525:        int64_t *bap2 = NULL;
1.1       mycroft   526:        struct vnode *vp;
1.53      fvdl      527:        daddr_t nb, nlbn, last;
1.55      fvdl      528:        char *copy = NULL;
                    529:        int64_t blkcount, factor, blocksreleased = 0;
                    530:        int nblocks;
1.1       mycroft   531:        int error = 0, allerror = 0;
1.55      fvdl      532: #ifdef FFS_EI
                    533:        const int needswap = UFS_FSNEEDSWAP(fs);
                    534: #endif
                    535: #define RBAP(ip, i) (((ip)->i_ump->um_fstype == UFS1) ? \
                    536:            ufs_rw32(bap1[i], needswap) : ufs_rw64(bap2[i], needswap))
1.57      kristerw  537: #define BAP_ASSIGN(ip, i, value)                                       \
                    538:        do {                                                            \
                    539:                if ((ip)->i_ump->um_fstype == UFS1)                     \
                    540:                        bap1[i] = (value);                              \
                    541:                else                                                    \
                    542:                        bap2[i] = (value);                              \
                    543:        } while(0)
1.1       mycroft   544:
                    545:        /*
                    546:         * Calculate index in current block of last
                    547:         * block to be kept.  -1 indicates the entire
                    548:         * block so we need not calculate the index.
                    549:         */
                    550:        factor = 1;
                    551:        for (i = SINGLE; i < level; i++)
                    552:                factor *= NINDIR(fs);
                    553:        last = lastbn;
                    554:        if (lastbn > 0)
                    555:                last /= factor;
                    556:        nblocks = btodb(fs->fs_bsize);
                    557:        /*
                    558:         * Get buffer of block pointers, zero those entries corresponding
                    559:         * to blocks to be free'd, and update on disk copy first.  Since
                    560:         * double(triple) indirect before single(double) indirect, calls
                    561:         * to bmap on these blocks will fail.  However, we already have
                    562:         * the on disk address, so we have to set the b_blkno field
                    563:         * explicitly instead of letting bread do everything for us.
                    564:         */
                    565:        vp = ITOV(ip);
                    566:        bp = getblk(vp, lbn, (int)fs->fs_bsize, 0, 0);
                    567:        if (bp->b_flags & (B_DONE | B_DELWRI)) {
                    568:                /* Braces must be here in case trace evaluates to nothing. */
                    569:                trace(TR_BREADHIT, pack(vp, fs->fs_bsize), lbn);
                    570:        } else {
                    571:                trace(TR_BREADMISS, pack(vp, fs->fs_bsize), lbn);
                    572:                curproc->p_stats->p_ru.ru_inblock++;    /* pay for read */
                    573:                bp->b_flags |= B_READ;
                    574:                if (bp->b_bcount > bp->b_bufsize)
                    575:                        panic("ffs_indirtrunc: bad buffer size");
                    576:                bp->b_blkno = dbn;
1.61      yamt      577:                BIO_SETPRIO(bp, BPRIO_TIMECRITICAL);
1.62      hannken   578:                VOP_STRATEGY(vp, bp);
1.1       mycroft   579:                error = biowait(bp);
                    580:        }
                    581:        if (error) {
                    582:                brelse(bp);
                    583:                *countp = 0;
                    584:                return (error);
                    585:        }
                    586:
1.55      fvdl      587:        if (ip->i_ump->um_fstype == UFS1)
                    588:                bap1 = (int32_t *)bp->b_data;
                    589:        else
                    590:                bap2 = (int64_t *)bp->b_data;
1.33      mycroft   591:        if (lastbn >= 0) {
1.55      fvdl      592:                copy = malloc(fs->fs_bsize, M_TEMP, M_WAITOK);
1.86      christos  593:                memcpy((void *)copy, bp->b_data, (u_int)fs->fs_bsize);
1.55      fvdl      594:                for (i = last + 1; i < NINDIR(fs); i++)
1.57      kristerw  595:                        BAP_ASSIGN(ip, i, 0);
1.12      thorpej   596:                error = bwrite(bp);
                    597:                if (error)
                    598:                        allerror = error;
1.55      fvdl      599:                if (ip->i_ump->um_fstype == UFS1)
                    600:                        bap1 = (int32_t *)copy;
                    601:                else
                    602:                        bap2 = (int64_t *)copy;
1.12      thorpej   603:        }
1.1       mycroft   604:
                    605:        /*
                    606:         * Recursively free totally unused blocks.
                    607:         */
                    608:        for (i = NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
                    609:            i--, nlbn += factor) {
1.55      fvdl      610:                nb = RBAP(ip, i);
1.1       mycroft   611:                if (nb == 0)
                    612:                        continue;
                    613:                if (level > SINGLE) {
1.9       christos  614:                        error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
1.53      fvdl      615:                                               (daddr_t)-1, level - 1,
1.9       christos  616:                                               &blkcount);
                    617:                        if (error)
1.1       mycroft   618:                                allerror = error;
                    619:                        blocksreleased += blkcount;
                    620:                }
1.63      hannken   621:                ffs_blkfree(fs, ip->i_devvp, nb, fs->fs_bsize, ip->i_number);
1.1       mycroft   622:                blocksreleased += nblocks;
                    623:        }
                    624:
                    625:        /*
                    626:         * Recursively free last partial block.
                    627:         */
                    628:        if (level > SINGLE && lastbn >= 0) {
                    629:                last = lastbn % factor;
1.55      fvdl      630:                nb = RBAP(ip, i);
1.1       mycroft   631:                if (nb != 0) {
1.9       christos  632:                        error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
                    633:                                               last, level - 1, &blkcount);
                    634:                        if (error)
1.1       mycroft   635:                                allerror = error;
                    636:                        blocksreleased += blkcount;
                    637:                }
                    638:        }
1.12      thorpej   639:
                    640:        if (copy != NULL) {
                    641:                FREE(copy, M_TEMP);
                    642:        } else {
                    643:                bp->b_flags |= B_INVAL;
                    644:                brelse(bp);
                    645:        }
                    646:
1.1       mycroft   647:        *countp = blocksreleased;
                    648:        return (allerror);
                    649: }
1.74      drochner  650:
                    651: void
                    652: ffs_itimes(struct inode *ip, const struct timespec *acc,
                    653:     const struct timespec *mod, const struct timespec *cre)
                    654: {
1.82      kardel    655:        struct timespec now;
1.75      christos  656:
1.76      yamt      657:        if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) {
                    658:                return;
                    659:        }
1.75      christos  660:
1.83      yamt      661:        vfs_timestamp(&now);
1.74      drochner  662:        if (ip->i_flag & IN_ACCESS) {
                    663:                if (acc == NULL)
1.82      kardel    664:                        acc = &now;
1.74      drochner  665:                DIP_ASSIGN(ip, atime, acc->tv_sec);
                    666:                DIP_ASSIGN(ip, atimensec, acc->tv_nsec);
                    667:        }
                    668:        if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
                    669:                if ((ip->i_flags & SF_SNAPSHOT) == 0) {
                    670:                        if (mod == NULL)
1.82      kardel    671:                                mod = &now;
1.74      drochner  672:                        DIP_ASSIGN(ip, mtime, mod->tv_sec);
                    673:                        DIP_ASSIGN(ip, mtimensec, mod->tv_nsec);
                    674:                }
                    675:                ip->i_modrev++;
                    676:        }
                    677:        if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
                    678:                if (cre == NULL)
1.82      kardel    679:                        cre = &now;
1.74      drochner  680:                DIP_ASSIGN(ip, ctime, cre->tv_sec);
                    681:                DIP_ASSIGN(ip, ctimensec, cre->tv_nsec);
                    682:        }
                    683:        if (ip->i_flag & (IN_ACCESS | IN_MODIFY))
                    684:                ip->i_flag |= IN_ACCESSED;
                    685:        if (ip->i_flag & (IN_UPDATE | IN_CHANGE))
                    686:                ip->i_flag |= IN_MODIFIED;
                    687:        ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
                    688: }

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