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Annotation of src/sys/ufs/ffs/ffs_inode.c, Revision 1.95.4.1

1.95.4.1! yamt        1: /*     $NetBSD: ffs_inode.c,v 1.95 2008/03/27 19:06:52 ad Exp $        */
        !             2:
        !             3: /*-
        !             4:  * Copyright (c) 2008 The NetBSD Foundation, Inc.
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * This code is derived from software contributed to The NetBSD Foundation
        !             8:  * by Wasabi Systems, 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:  *
        !            19:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            20:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            21:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            22:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            23:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            24:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            25:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            26:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            27:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            28:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            29:  * POSSIBILITY OF SUCH DAMAGE.
        !            30:  */
1.5       cgd        31:
1.1       mycroft    32: /*
                     33:  * Copyright (c) 1982, 1986, 1989, 1993
                     34:  *     The Regents of the University of California.  All rights reserved.
                     35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
1.60      agc        44:  * 3. Neither the name of the University nor the names of its contributors
1.1       mycroft    45:  *    may be used to endorse or promote products derived from this software
                     46:  *    without specific prior written permission.
                     47:  *
                     48:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     49:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     50:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     51:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     52:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     53:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     54:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     55:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     56:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     57:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     58:  * SUCH DAMAGE.
                     59:  *
1.18      fvdl       60:  *     @(#)ffs_inode.c 8.13 (Berkeley) 4/21/95
1.1       mycroft    61:  */
1.46      lukem      62:
                     63: #include <sys/cdefs.h>
1.95.4.1! yamt       64: __KERNEL_RCSID(0, "$NetBSD: ffs_inode.c,v 1.95 2008/03/27 19:06:52 ad Exp $");
1.17      mrg        65:
1.41      mrg        66: #if defined(_KERNEL_OPT)
1.25      thorpej    67: #include "opt_ffs.h"
1.20      scottr     68: #include "opt_quota.h"
1.21      scottr     69: #endif
1.1       mycroft    70:
                     71: #include <sys/param.h>
                     72: #include <sys/systm.h>
                     73: #include <sys/buf.h>
1.95.4.1! yamt       74: #include <sys/file.h>
        !            75: #include <sys/fstrans.h>
        !            76: #include <sys/kauth.h>
1.1       mycroft    77: #include <sys/kernel.h>
                     78: #include <sys/malloc.h>
1.95.4.1! yamt       79: #include <sys/mount.h>
        !            80: #include <sys/proc.h>
1.1       mycroft    81: #include <sys/resourcevar.h>
1.95.4.1! yamt       82: #include <sys/trace.h>
        !            83: #include <sys/vnode.h>
        !            84: #include <sys/wapbl.h>
1.16      mrg        85:
1.1       mycroft    86: #include <ufs/ufs/quota.h>
                     87: #include <ufs/ufs/inode.h>
                     88: #include <ufs/ufs/ufsmount.h>
                     89: #include <ufs/ufs/ufs_extern.h>
1.19      bouyer     90: #include <ufs/ufs/ufs_bswap.h>
1.95.4.1! yamt       91: #include <ufs/ufs/ufs_wapbl.h>
1.1       mycroft    92:
                     93: #include <ufs/ffs/fs.h>
                     94: #include <ufs/ffs/ffs_extern.h>
                     95:
1.72      thorpej    96: static int ffs_indirtrunc(struct inode *, daddr_t, daddr_t, daddr_t, int,
                     97:                          int64_t *);
1.1       mycroft    98:
                     99: /*
1.13      tls       100:  * Update the access, modified, and inode change times as specified
                    101:  * by the IN_ACCESS, IN_UPDATE, and IN_CHANGE flags respectively.
                    102:  * The IN_MODIFIED flag is used to specify that the inode needs to be
                    103:  * updated but that the times have already been set. The access
                    104:  * and modified times are taken from the second and third parameters;
                    105:  * the inode change time is always taken from the current time. If
1.95.4.1! yamt      106:  * UPDATE_WAIT flag is set, or UPDATE_DIROP is set then wait for the
        !           107:  * disk write of the inode to complete.
1.1       mycroft   108:  */
1.13      tls       109:
1.1       mycroft   110: int
1.77      yamt      111: ffs_update(struct vnode *vp, const struct timespec *acc,
                    112:     const struct timespec *mod, int updflags)
1.9       christos  113: {
1.30      augustss  114:        struct fs *fs;
1.1       mycroft   115:        struct buf *bp;
                    116:        struct inode *ip;
                    117:        int error;
1.86      christos  118:        void *cp;
1.34      mycroft   119:        int waitfor, flags;
1.1       mycroft   120:
1.77      yamt      121:        if (vp->v_mount->mnt_flag & MNT_RDONLY)
1.11      mycroft   122:                return (0);
1.77      yamt      123:        ip = VTOI(vp);
                    124:        FFS_ITIMES(ip, acc, mod, NULL);
                    125:        if (updflags & UPDATE_CLOSE)
1.65      mycroft   126:                flags = ip->i_flag & (IN_MODIFIED | IN_ACCESSED);
                    127:        else
                    128:                flags = ip->i_flag & IN_MODIFIED;
1.34      mycroft   129:        if (flags == 0)
1.1       mycroft   130:                return (0);
                    131:        fs = ip->i_fs;
1.31      perseant  132:
1.35      mycroft   133:        if ((flags & IN_MODIFIED) != 0 &&
1.77      yamt      134:            (vp->v_mount->mnt_flag & MNT_ASYNC) == 0) {
                    135:                waitfor = updflags & UPDATE_WAIT;
1.95.4.1! yamt      136:                if ((updflags & UPDATE_DIROP) != 0)
1.35      mycroft   137:                        waitfor |= UPDATE_WAIT;
                    138:        } else
                    139:                waitfor = 0;
1.31      perseant  140:
1.1       mycroft   141:        /*
                    142:         * Ensure that uid and gid are correct. This is a temporary
                    143:         * fix until fsck has been changed to do the update.
                    144:         */
1.55      fvdl      145:        if (fs->fs_magic == FS_UFS1_MAGIC &&                    /* XXX */
                    146:            fs->fs_old_inodefmt < FS_44INODEFMT) {              /* XXX */
                    147:                ip->i_ffs1_ouid = ip->i_uid;    /* XXX */
                    148:                ip->i_ffs1_ogid = ip->i_gid;    /* XXX */
1.18      fvdl      149:        }                                                       /* XXX */
1.9       christos  150:        error = bread(ip->i_devvp,
                    151:                      fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
1.95.4.1! yamt      152:                      (int)fs->fs_bsize, NOCRED, B_MODIFY, &bp);
1.9       christos  153:        if (error) {
1.89      ad        154:                brelse(bp, 0);
1.1       mycroft   155:                return (error);
                    156:        }
1.35      mycroft   157:        ip->i_flag &= ~(IN_MODIFIED | IN_ACCESSED);
1.95.4.1! yamt      158:        /* Keep unlinked inode list up to date */
        !           159:        KDASSERT(DIP(ip, nlink) == ip->i_nlink);
        !           160:        if (ip->i_mode) {
        !           161:                if (ip->i_nlink > 0) {
        !           162:                        UFS_WAPBL_UNREGISTER_INODE(ip->i_ump->um_mountp,
        !           163:                            ip->i_number, ip->i_mode);
        !           164:                } else {
        !           165:                        UFS_WAPBL_REGISTER_INODE(ip->i_ump->um_mountp,
        !           166:                            ip->i_number, ip->i_mode);
        !           167:                }
        !           168:        }
1.55      fvdl      169:        if (fs->fs_magic == FS_UFS1_MAGIC) {
1.86      christos  170:                cp = (char *)bp->b_data +
1.55      fvdl      171:                    (ino_to_fsbo(fs, ip->i_number) * DINODE1_SIZE);
1.23      christos  172: #ifdef FFS_EI
1.55      fvdl      173:                if (UFS_FSNEEDSWAP(fs))
                    174:                        ffs_dinode1_swap(ip->i_din.ffs1_din,
                    175:                            (struct ufs1_dinode *)cp);
                    176:                else
                    177: #endif
                    178:                        memcpy(cp, ip->i_din.ffs1_din, DINODE1_SIZE);
                    179:        } else {
1.86      christos  180:                cp = (char *)bp->b_data +
1.55      fvdl      181:                    (ino_to_fsbo(fs, ip->i_number) * DINODE2_SIZE);
                    182: #ifdef FFS_EI
                    183:                if (UFS_FSNEEDSWAP(fs))
                    184:                        ffs_dinode2_swap(ip->i_din.ffs2_din,
                    185:                            (struct ufs2_dinode *)cp);
                    186:                else
1.23      christos  187: #endif
1.55      fvdl      188:                        memcpy(cp, ip->i_din.ffs2_din, DINODE2_SIZE);
                    189:        }
1.35      mycroft   190:        if (waitfor) {
1.1       mycroft   191:                return (bwrite(bp));
1.29      fvdl      192:        } else {
1.1       mycroft   193:                bdwrite(bp);
                    194:                return (0);
                    195:        }
                    196: }
                    197:
                    198: #define        SINGLE  0       /* index of single indirect block */
                    199: #define        DOUBLE  1       /* index of double indirect block */
                    200: #define        TRIPLE  2       /* index of triple indirect block */
                    201: /*
                    202:  * Truncate the inode oip to at most length size, freeing the
                    203:  * disk blocks.
                    204:  */
1.9       christos  205: int
1.92      pooka     206: ffs_truncate(struct vnode *ovp, off_t length, int ioflag, kauth_cred_t cred)
1.9       christos  207: {
1.53      fvdl      208:        daddr_t lastblock;
1.68      mycroft   209:        struct inode *oip = VTOI(ovp);
1.53      fvdl      210:        daddr_t bn, lastiblock[NIADDR], indir_lbn[NIADDR];
1.64      hannken   211:        daddr_t blks[NDADDR + NIADDR];
1.30      augustss  212:        struct fs *fs;
1.85      yamt      213:        int offset, pgoffset, level;
1.55      fvdl      214:        int64_t count, blocksreleased = 0;
1.77      yamt      215:        int i, aflag, nblocks;
1.38      chs       216:        int error, allerror = 0;
1.1       mycroft   217:        off_t osize;
1.67      mycroft   218:        int sync;
1.68      mycroft   219:        struct ufsmount *ump = oip->i_ump;
1.1       mycroft   220:
1.78      yamt      221:        if (ovp->v_type == VCHR || ovp->v_type == VBLK ||
                    222:            ovp->v_type == VFIFO || ovp->v_type == VSOCK) {
                    223:                KASSERT(oip->i_size == 0);
                    224:                return 0;
                    225:        }
                    226:
1.2       pk        227:        if (length < 0)
1.3       mycroft   228:                return (EINVAL);
1.68      mycroft   229:
1.1       mycroft   230:        if (ovp->v_type == VLNK &&
1.68      mycroft   231:            (oip->i_size < ump->um_maxsymlinklen ||
                    232:             (ump->um_maxsymlinklen == 0 && DIP(oip, blocks) == 0))) {
1.38      chs       233:                KDASSERT(length == 0);
1.55      fvdl      234:                memset(SHORTLINK(oip), 0, (size_t)oip->i_size);
                    235:                oip->i_size = 0;
1.57      kristerw  236:                DIP_ASSIGN(oip, size, 0);
1.1       mycroft   237:                oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77      yamt      238:                return (ffs_update(ovp, NULL, NULL, 0));
1.1       mycroft   239:        }
1.55      fvdl      240:        if (oip->i_size == length) {
1.1       mycroft   241:                oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77      yamt      242:                return (ffs_update(ovp, NULL, NULL, 0));
1.1       mycroft   243:        }
                    244:        fs = oip->i_fs;
1.68      mycroft   245:        if (length > ump->um_maxfilesize)
1.38      chs       246:                return (EFBIG);
                    247:
1.63      hannken   248:        if ((oip->i_flags & SF_SNAPSHOT) != 0)
                    249:                ffs_snapremove(ovp);
                    250:
1.55      fvdl      251:        osize = oip->i_size;
1.50      chs       252:        aflag = ioflag & IO_SYNC ? B_SYNC : 0;
1.29      fvdl      253:
1.38      chs       254:        /*
                    255:         * Lengthen the size of the file. We must ensure that the
                    256:         * last byte of the file is allocated. Since the smallest
                    257:         * value of osize is 0, length will be at least 1.
                    258:         */
                    259:
                    260:        if (osize < length) {
1.48      chs       261:                if (lblkno(fs, osize) < NDADDR &&
                    262:                    lblkno(fs, osize) != lblkno(fs, length) &&
                    263:                    blkroundup(fs, osize) != osize) {
1.69      mycroft   264:                        off_t eob;
                    265:
                    266:                        eob = blkroundup(fs, osize);
1.87      yamt      267:                        uvm_vnp_setwritesize(ovp, eob);
1.69      mycroft   268:                        error = ufs_balloc_range(ovp, osize, eob - osize,
1.77      yamt      269:                            cred, aflag);
1.68      mycroft   270:                        if (error)
1.48      chs       271:                                return error;
                    272:                        if (ioflag & IO_SYNC) {
1.93      ad        273:                                mutex_enter(&ovp->v_interlock);
1.49      chs       274:                                VOP_PUTPAGES(ovp,
1.69      mycroft   275:                                    trunc_page(osize & fs->fs_bmask),
1.95.4.1! yamt      276:                                    round_page(eob), PGO_CLEANIT | PGO_SYNCIO |
        !           277:                                    PGO_JOURNALLOCKED);
1.48      chs       278:                        }
                    279:                }
1.87      yamt      280:                uvm_vnp_setwritesize(ovp, length);
1.77      yamt      281:                error = ufs_balloc_range(ovp, length - 1, 1, cred, aflag);
1.45      chs       282:                if (error) {
1.92      pooka     283:                        (void) ffs_truncate(ovp, osize, ioflag & IO_SYNC, cred);
1.68      mycroft   284:                        return (error);
1.45      chs       285:                }
1.43      chs       286:                uvm_vnp_setsize(ovp, length);
1.38      chs       287:                oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.55      fvdl      288:                KASSERT(ovp->v_size == oip->i_size);
1.77      yamt      289:                return (ffs_update(ovp, NULL, NULL, 0));
1.38      chs       290:        }
                    291:
                    292:        /*
                    293:         * When truncating a regular file down to a non-block-aligned size,
                    294:         * we must zero the part of last block which is past the new EOF.
                    295:         * We must synchronously flush the zeroed pages to disk
                    296:         * since the new pages will be invalidated as soon as we
                    297:         * inform the VM system of the new, smaller size.
1.48      chs       298:         * We must do this before acquiring the GLOCK, since fetching
1.38      chs       299:         * the pages will acquire the GLOCK internally.
                    300:         * So there is a window where another thread could see a whole
                    301:         * zeroed page past EOF, but that's life.
                    302:         */
                    303:
                    304:        offset = blkoff(fs, length);
1.85      yamt      305:        pgoffset = length & PAGE_MASK;
                    306:        if (ovp->v_type == VREG && (pgoffset != 0 || offset != 0) &&
                    307:            osize > length) {
1.70      mycroft   308:                daddr_t lbn;
1.38      chs       309:                voff_t eoz;
1.85      yamt      310:                int size;
1.38      chs       311:
1.85      yamt      312:                if (offset != 0) {
                    313:                        error = ufs_balloc_range(ovp, length - 1, 1, cred,
                    314:                            aflag);
                    315:                        if (error)
                    316:                                return error;
                    317:                }
1.70      mycroft   318:                lbn = lblkno(fs, length);
                    319:                size = blksize(fs, oip, lbn);
1.85      yamt      320:                eoz = MIN(MAX(lblktosize(fs, lbn) + size, round_page(pgoffset)),
                    321:                    osize);
1.38      chs       322:                uvm_vnp_zerorange(ovp, length, eoz - length);
1.70      mycroft   323:                if (round_page(eoz) > round_page(length)) {
1.93      ad        324:                        mutex_enter(&ovp->v_interlock);
1.70      mycroft   325:                        error = VOP_PUTPAGES(ovp, round_page(length),
                    326:                            round_page(eoz),
1.95.4.1! yamt      327:                            PGO_CLEANIT | PGO_DEACTIVATE | PGO_JOURNALLOCKED |
1.71      mycroft   328:                            ((ioflag & IO_SYNC) ? PGO_SYNCIO : 0));
1.70      mycroft   329:                        if (error)
                    330:                                return error;
                    331:                }
1.38      chs       332:        }
                    333:
1.84      yamt      334:        genfs_node_wrlock(ovp);
1.55      fvdl      335:        oip->i_size = length;
1.57      kristerw  336:        DIP_ASSIGN(oip, size, length);
1.18      fvdl      337:        uvm_vnp_setsize(ovp, length);
1.1       mycroft   338:        /*
                    339:         * Calculate index into inode's block list of
                    340:         * last direct and indirect blocks (if any)
                    341:         * which we want to keep.  Lastblock is -1 when
                    342:         * the file is truncated to 0.
                    343:         */
                    344:        lastblock = lblkno(fs, length + fs->fs_bsize - 1) - 1;
                    345:        lastiblock[SINGLE] = lastblock - NDADDR;
                    346:        lastiblock[DOUBLE] = lastiblock[SINGLE] - NINDIR(fs);
                    347:        lastiblock[TRIPLE] = lastiblock[DOUBLE] - NINDIR(fs) * NINDIR(fs);
                    348:        nblocks = btodb(fs->fs_bsize);
                    349:        /*
                    350:         * Update file and block pointers on disk before we start freeing
                    351:         * blocks.  If we crash before free'ing blocks below, the blocks
                    352:         * will be returned to the free list.  lastiblock values are also
                    353:         * normalized to -1 for calls to ffs_indirtrunc below.
                    354:         */
1.67      mycroft   355:        sync = 0;
1.55      fvdl      356:        for (level = TRIPLE; level >= SINGLE; level--) {
1.64      hannken   357:                blks[NDADDR + level] = DIP(oip, ib[level]);
1.67      mycroft   358:                if (lastiblock[level] < 0 && blks[NDADDR + level] != 0) {
                    359:                        sync = 1;
1.57      kristerw  360:                        DIP_ASSIGN(oip, ib[level], 0);
1.1       mycroft   361:                        lastiblock[level] = -1;
                    362:                }
1.55      fvdl      363:        }
                    364:        for (i = 0; i < NDADDR; i++) {
1.64      hannken   365:                blks[i] = DIP(oip, db[i]);
1.67      mycroft   366:                if (i > lastblock && blks[i] != 0) {
                    367:                        sync = 1;
1.57      kristerw  368:                        DIP_ASSIGN(oip, db[i], 0);
1.67      mycroft   369:                }
                    370:        }
1.68      mycroft   371:        oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.67      mycroft   372:        if (sync) {
1.77      yamt      373:                error = ffs_update(ovp, NULL, NULL, UPDATE_WAIT);
1.67      mycroft   374:                if (error && !allerror)
                    375:                        allerror = error;
1.55      fvdl      376:        }
1.32      mycroft   377:
1.1       mycroft   378:        /*
                    379:         * Having written the new inode to disk, save its new configuration
                    380:         * and put back the old block pointers long enough to process them.
                    381:         * Note that we save the new block configuration so we can check it
                    382:         * when we are done.
                    383:         */
1.55      fvdl      384:        for (i = 0; i < NDADDR; i++) {
1.64      hannken   385:                bn = DIP(oip, db[i]);
                    386:                DIP_ASSIGN(oip, db[i], blks[i]);
                    387:                blks[i] = bn;
1.55      fvdl      388:        }
                    389:        for (i = 0; i < NIADDR; i++) {
1.64      hannken   390:                bn = DIP(oip, ib[i]);
                    391:                DIP_ASSIGN(oip, ib[i], blks[NDADDR + i]);
                    392:                blks[NDADDR + i] = bn;
1.55      fvdl      393:        }
                    394:
                    395:        oip->i_size = osize;
1.57      kristerw  396:        DIP_ASSIGN(oip, size, osize);
1.32      mycroft   397:        error = vtruncbuf(ovp, lastblock + 1, 0, 0);
                    398:        if (error && !allerror)
                    399:                allerror = error;
1.1       mycroft   400:
                    401:        /*
                    402:         * Indirect blocks first.
                    403:         */
                    404:        indir_lbn[SINGLE] = -NDADDR;
                    405:        indir_lbn[DOUBLE] = indir_lbn[SINGLE] - NINDIR(fs) - 1;
                    406:        indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - NINDIR(fs) * NINDIR(fs) - 1;
                    407:        for (level = TRIPLE; level >= SINGLE; level--) {
1.55      fvdl      408:                if (oip->i_ump->um_fstype == UFS1)
                    409:                        bn = ufs_rw32(oip->i_ffs1_ib[level],UFS_FSNEEDSWAP(fs));
                    410:                else
                    411:                        bn = ufs_rw64(oip->i_ffs2_ib[level],UFS_FSNEEDSWAP(fs));
1.1       mycroft   412:                if (bn != 0) {
                    413:                        error = ffs_indirtrunc(oip, indir_lbn[level],
                    414:                            fsbtodb(fs, bn), lastiblock[level], level, &count);
                    415:                        if (error)
                    416:                                allerror = error;
                    417:                        blocksreleased += count;
                    418:                        if (lastiblock[level] < 0) {
1.57      kristerw  419:                                DIP_ASSIGN(oip, ib[level], 0);
1.95.4.1! yamt      420:                                if (oip->i_ump->um_mountp->mnt_wapbl) {
        !           421:                                        UFS_WAPBL_REGISTER_DEALLOCATION(
        !           422:                                            oip->i_ump->um_mountp,
        !           423:                                            fsbtodb(fs, bn), fs->fs_bsize);
        !           424:                                } else
        !           425:                                        ffs_blkfree(fs, oip->i_devvp, bn,
        !           426:                                            fs->fs_bsize, oip->i_number);
1.1       mycroft   427:                                blocksreleased += nblocks;
                    428:                        }
                    429:                }
                    430:                if (lastiblock[level] >= 0)
                    431:                        goto done;
                    432:        }
                    433:
                    434:        /*
                    435:         * All whole direct blocks or frags.
                    436:         */
                    437:        for (i = NDADDR - 1; i > lastblock; i--) {
1.30      augustss  438:                long bsize;
1.1       mycroft   439:
1.55      fvdl      440:                if (oip->i_ump->um_fstype == UFS1)
                    441:                        bn = ufs_rw32(oip->i_ffs1_db[i], UFS_FSNEEDSWAP(fs));
                    442:                else
                    443:                        bn = ufs_rw64(oip->i_ffs2_db[i], UFS_FSNEEDSWAP(fs));
1.1       mycroft   444:                if (bn == 0)
                    445:                        continue;
1.57      kristerw  446:                DIP_ASSIGN(oip, db[i], 0);
1.1       mycroft   447:                bsize = blksize(fs, oip, i);
1.95.4.1! yamt      448:                if ((oip->i_ump->um_mountp->mnt_wapbl) &&
        !           449:                    (ovp->v_type != VREG)) {
        !           450:                        UFS_WAPBL_REGISTER_DEALLOCATION(oip->i_ump->um_mountp,
        !           451:                            fsbtodb(fs, bn), bsize);
        !           452:                } else
        !           453:                        ffs_blkfree(fs, oip->i_devvp, bn, bsize, oip->i_number);
1.1       mycroft   454:                blocksreleased += btodb(bsize);
                    455:        }
                    456:        if (lastblock < 0)
                    457:                goto done;
                    458:
                    459:        /*
                    460:         * Finally, look for a change in size of the
                    461:         * last direct block; release any frags.
                    462:         */
1.55      fvdl      463:        if (oip->i_ump->um_fstype == UFS1)
                    464:                bn = ufs_rw32(oip->i_ffs1_db[lastblock], UFS_FSNEEDSWAP(fs));
                    465:        else
                    466:                bn = ufs_rw64(oip->i_ffs2_db[lastblock], UFS_FSNEEDSWAP(fs));
1.1       mycroft   467:        if (bn != 0) {
                    468:                long oldspace, newspace;
                    469:
                    470:                /*
                    471:                 * Calculate amount of space we're giving
                    472:                 * back as old block size minus new block size.
                    473:                 */
                    474:                oldspace = blksize(fs, oip, lastblock);
1.55      fvdl      475:                oip->i_size = length;
1.57      kristerw  476:                DIP_ASSIGN(oip, size, length);
1.1       mycroft   477:                newspace = blksize(fs, oip, lastblock);
                    478:                if (newspace == 0)
                    479:                        panic("itrunc: newspace");
                    480:                if (oldspace - newspace > 0) {
                    481:                        /*
                    482:                         * Block number of space to be free'd is
                    483:                         * the old block # plus the number of frags
                    484:                         * required for the storage we're keeping.
                    485:                         */
                    486:                        bn += numfrags(fs, newspace);
1.95.4.1! yamt      487:                        if ((oip->i_ump->um_mountp->mnt_wapbl) &&
        !           488:                            (ovp->v_type != VREG)) {
        !           489:                                UFS_WAPBL_REGISTER_DEALLOCATION(
        !           490:                                    oip->i_ump->um_mountp, fsbtodb(fs, bn),
        !           491:                                    oldspace - newspace);
        !           492:                        } else
        !           493:                                ffs_blkfree(fs, oip->i_devvp, bn,
        !           494:                                    oldspace - newspace, oip->i_number);
1.1       mycroft   495:                        blocksreleased += btodb(oldspace - newspace);
                    496:                }
                    497:        }
1.32      mycroft   498:
1.1       mycroft   499: done:
                    500: #ifdef DIAGNOSTIC
                    501:        for (level = SINGLE; level <= TRIPLE; level++)
1.64      hannken   502:                if (blks[NDADDR + level] != DIP(oip, ib[level]))
1.1       mycroft   503:                        panic("itrunc1");
                    504:        for (i = 0; i < NDADDR; i++)
1.64      hannken   505:                if (blks[i] != DIP(oip, db[i]))
1.1       mycroft   506:                        panic("itrunc2");
                    507:        if (length == 0 &&
1.32      mycroft   508:            (!LIST_EMPTY(&ovp->v_cleanblkhd) || !LIST_EMPTY(&ovp->v_dirtyblkhd)))
1.1       mycroft   509:                panic("itrunc3");
                    510: #endif /* DIAGNOSTIC */
                    511:        /*
                    512:         * Put back the real size.
                    513:         */
1.55      fvdl      514:        oip->i_size = length;
1.57      kristerw  515:        DIP_ASSIGN(oip, size, length);
                    516:        DIP_ADD(oip, blocks, -blocksreleased);
1.84      yamt      517:        genfs_node_unlock(ovp);
1.1       mycroft   518:        oip->i_flag |= IN_CHANGE;
1.95.4.1! yamt      519:        UFS_WAPBL_UPDATE(ovp, NULL, NULL, 0);
1.1       mycroft   520: #ifdef QUOTA
                    521:        (void) chkdq(oip, -blocksreleased, NOCRED, 0);
                    522: #endif
1.55      fvdl      523:        KASSERT(ovp->v_type != VREG || ovp->v_size == oip->i_size);
1.1       mycroft   524:        return (allerror);
                    525: }
                    526:
                    527: /*
                    528:  * Release blocks associated with the inode ip and stored in the indirect
                    529:  * block bn.  Blocks are free'd in LIFO order up to (but not including)
                    530:  * lastbn.  If level is greater than SINGLE, the block is an indirect block
                    531:  * and recursive calls to indirtrunc must be used to cleanse other indirect
                    532:  * blocks.
                    533:  *
                    534:  * NB: triple indirect blocks are untested.
                    535:  */
                    536: static int
1.72      thorpej   537: ffs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn,
                    538:     int level, int64_t *countp)
1.1       mycroft   539: {
1.30      augustss  540:        int i;
1.1       mycroft   541:        struct buf *bp;
1.30      augustss  542:        struct fs *fs = ip->i_fs;
1.55      fvdl      543:        int32_t *bap1 = NULL;
                    544:        int64_t *bap2 = NULL;
1.1       mycroft   545:        struct vnode *vp;
1.53      fvdl      546:        daddr_t nb, nlbn, last;
1.55      fvdl      547:        char *copy = NULL;
                    548:        int64_t blkcount, factor, blocksreleased = 0;
                    549:        int nblocks;
1.1       mycroft   550:        int error = 0, allerror = 0;
1.55      fvdl      551: #ifdef FFS_EI
                    552:        const int needswap = UFS_FSNEEDSWAP(fs);
                    553: #endif
                    554: #define RBAP(ip, i) (((ip)->i_ump->um_fstype == UFS1) ? \
                    555:            ufs_rw32(bap1[i], needswap) : ufs_rw64(bap2[i], needswap))
1.57      kristerw  556: #define BAP_ASSIGN(ip, i, value)                                       \
                    557:        do {                                                            \
                    558:                if ((ip)->i_ump->um_fstype == UFS1)                     \
                    559:                        bap1[i] = (value);                              \
                    560:                else                                                    \
                    561:                        bap2[i] = (value);                              \
                    562:        } while(0)
1.1       mycroft   563:
                    564:        /*
                    565:         * Calculate index in current block of last
                    566:         * block to be kept.  -1 indicates the entire
                    567:         * block so we need not calculate the index.
                    568:         */
                    569:        factor = 1;
                    570:        for (i = SINGLE; i < level; i++)
                    571:                factor *= NINDIR(fs);
                    572:        last = lastbn;
                    573:        if (lastbn > 0)
                    574:                last /= factor;
                    575:        nblocks = btodb(fs->fs_bsize);
                    576:        /*
                    577:         * Get buffer of block pointers, zero those entries corresponding
                    578:         * to blocks to be free'd, and update on disk copy first.  Since
                    579:         * double(triple) indirect before single(double) indirect, calls
                    580:         * to bmap on these blocks will fail.  However, we already have
                    581:         * the on disk address, so we have to set the b_blkno field
                    582:         * explicitly instead of letting bread do everything for us.
                    583:         */
                    584:        vp = ITOV(ip);
1.95.4.1! yamt      585:        error = ffs_getblk(vp, lbn, FFS_NOBLK, fs->fs_bsize, false, &bp);
        !           586:        if (error) {
        !           587:                *countp = 0;
        !           588:                return error;
        !           589:        }
1.93      ad        590:        if (bp->b_oflags & (BO_DONE | BO_DELWRI)) {
1.1       mycroft   591:                /* Braces must be here in case trace evaluates to nothing. */
                    592:                trace(TR_BREADHIT, pack(vp, fs->fs_bsize), lbn);
                    593:        } else {
                    594:                trace(TR_BREADMISS, pack(vp, fs->fs_bsize), lbn);
1.95      ad        595:                curlwp->l_ru.ru_inblock++;      /* pay for read */
1.1       mycroft   596:                bp->b_flags |= B_READ;
1.95.4.1! yamt      597:                bp->b_flags &= ~B_COWDONE;      /* we change blkno below */
1.1       mycroft   598:                if (bp->b_bcount > bp->b_bufsize)
                    599:                        panic("ffs_indirtrunc: bad buffer size");
                    600:                bp->b_blkno = dbn;
1.61      yamt      601:                BIO_SETPRIO(bp, BPRIO_TIMECRITICAL);
1.62      hannken   602:                VOP_STRATEGY(vp, bp);
1.1       mycroft   603:                error = biowait(bp);
1.95.4.1! yamt      604:                if (error == 0)
        !           605:                        error = fscow_run(bp, true);
1.1       mycroft   606:        }
                    607:        if (error) {
1.89      ad        608:                brelse(bp, 0);
1.1       mycroft   609:                *countp = 0;
                    610:                return (error);
                    611:        }
                    612:
1.55      fvdl      613:        if (ip->i_ump->um_fstype == UFS1)
                    614:                bap1 = (int32_t *)bp->b_data;
                    615:        else
                    616:                bap2 = (int64_t *)bp->b_data;
1.33      mycroft   617:        if (lastbn >= 0) {
1.55      fvdl      618:                copy = malloc(fs->fs_bsize, M_TEMP, M_WAITOK);
1.86      christos  619:                memcpy((void *)copy, bp->b_data, (u_int)fs->fs_bsize);
1.55      fvdl      620:                for (i = last + 1; i < NINDIR(fs); i++)
1.57      kristerw  621:                        BAP_ASSIGN(ip, i, 0);
1.12      thorpej   622:                error = bwrite(bp);
                    623:                if (error)
                    624:                        allerror = error;
1.55      fvdl      625:                if (ip->i_ump->um_fstype == UFS1)
                    626:                        bap1 = (int32_t *)copy;
                    627:                else
                    628:                        bap2 = (int64_t *)copy;
1.12      thorpej   629:        }
1.1       mycroft   630:
                    631:        /*
                    632:         * Recursively free totally unused blocks.
                    633:         */
                    634:        for (i = NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
                    635:            i--, nlbn += factor) {
1.55      fvdl      636:                nb = RBAP(ip, i);
1.1       mycroft   637:                if (nb == 0)
                    638:                        continue;
                    639:                if (level > SINGLE) {
1.9       christos  640:                        error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
1.53      fvdl      641:                                               (daddr_t)-1, level - 1,
1.9       christos  642:                                               &blkcount);
                    643:                        if (error)
1.1       mycroft   644:                                allerror = error;
                    645:                        blocksreleased += blkcount;
                    646:                }
1.95.4.1! yamt      647:                if ((ip->i_ump->um_mountp->mnt_wapbl) &&
        !           648:                    ((level > SINGLE) || (ITOV(ip)->v_type != VREG))) {
        !           649:                        UFS_WAPBL_REGISTER_DEALLOCATION(ip->i_ump->um_mountp,
        !           650:                            fsbtodb(fs, nb), fs->fs_bsize);
        !           651:                } else
        !           652:                        ffs_blkfree(fs, ip->i_devvp, nb, fs->fs_bsize,
        !           653:                            ip->i_number);
1.1       mycroft   654:                blocksreleased += nblocks;
                    655:        }
                    656:
                    657:        /*
                    658:         * Recursively free last partial block.
                    659:         */
                    660:        if (level > SINGLE && lastbn >= 0) {
                    661:                last = lastbn % factor;
1.55      fvdl      662:                nb = RBAP(ip, i);
1.1       mycroft   663:                if (nb != 0) {
1.9       christos  664:                        error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
                    665:                                               last, level - 1, &blkcount);
                    666:                        if (error)
1.1       mycroft   667:                                allerror = error;
                    668:                        blocksreleased += blkcount;
                    669:                }
                    670:        }
1.12      thorpej   671:
                    672:        if (copy != NULL) {
1.95.4.1! yamt      673:                free(copy, M_TEMP);
1.12      thorpej   674:        } else {
1.89      ad        675:                brelse(bp, BC_INVAL);
1.12      thorpej   676:        }
                    677:
1.1       mycroft   678:        *countp = blocksreleased;
                    679:        return (allerror);
                    680: }
1.74      drochner  681:
                    682: void
                    683: ffs_itimes(struct inode *ip, const struct timespec *acc,
                    684:     const struct timespec *mod, const struct timespec *cre)
                    685: {
1.82      kardel    686:        struct timespec now;
1.75      christos  687:
1.76      yamt      688:        if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) {
                    689:                return;
                    690:        }
1.75      christos  691:
1.83      yamt      692:        vfs_timestamp(&now);
1.74      drochner  693:        if (ip->i_flag & IN_ACCESS) {
                    694:                if (acc == NULL)
1.82      kardel    695:                        acc = &now;
1.74      drochner  696:                DIP_ASSIGN(ip, atime, acc->tv_sec);
                    697:                DIP_ASSIGN(ip, atimensec, acc->tv_nsec);
                    698:        }
                    699:        if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
                    700:                if ((ip->i_flags & SF_SNAPSHOT) == 0) {
                    701:                        if (mod == NULL)
1.82      kardel    702:                                mod = &now;
1.74      drochner  703:                        DIP_ASSIGN(ip, mtime, mod->tv_sec);
                    704:                        DIP_ASSIGN(ip, mtimensec, mod->tv_nsec);
                    705:                }
                    706:                ip->i_modrev++;
                    707:        }
                    708:        if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
                    709:                if (cre == NULL)
1.82      kardel    710:                        cre = &now;
1.74      drochner  711:                DIP_ASSIGN(ip, ctime, cre->tv_sec);
                    712:                DIP_ASSIGN(ip, ctimensec, cre->tv_nsec);
                    713:        }
                    714:        if (ip->i_flag & (IN_ACCESS | IN_MODIFY))
                    715:                ip->i_flag |= IN_ACCESSED;
                    716:        if (ip->i_flag & (IN_UPDATE | IN_CHANGE))
                    717:                ip->i_flag |= IN_MODIFIED;
                    718:        ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
                    719: }

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