Annotation of src/sys/ufs/ffs/ffs_inode.c, Revision 1.79.10.2
1.79.10.2! elad 1: /* $NetBSD: ffs_inode.c,v 1.79.10.1 2006/03/08 01:39:12 elad 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>
1.79.10.2! elad 35: __KERNEL_RCSID(0, "$NetBSD: ffs_inode.c,v 1.79.10.1 2006/03/08 01:39:12 elad 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>
1.16 mrg 53:
1.1 mycroft 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>
1.19 bouyer 58: #include <ufs/ufs/ufs_bswap.h>
1.1 mycroft 59:
60: #include <ufs/ffs/fs.h>
61: #include <ufs/ffs/ffs_extern.h>
62:
1.72 thorpej 63: static int ffs_indirtrunc(struct inode *, daddr_t, daddr_t, daddr_t, int,
64: int64_t *);
1.1 mycroft 65:
66: /*
1.13 tls 67: * Update the access, modified, and inode change times as specified
68: * by the IN_ACCESS, IN_UPDATE, and IN_CHANGE flags respectively.
69: * The IN_MODIFIED flag is used to specify that the inode needs to be
70: * updated but that the times have already been set. The access
71: * and modified times are taken from the second and third parameters;
72: * the inode change time is always taken from the current time. If
1.31 perseant 73: * UPDATE_WAIT flag is set, or UPDATE_DIROP is set and we are not doing
74: * softupdates, then wait for the disk write of the inode to complete.
1.1 mycroft 75: */
1.13 tls 76:
1.1 mycroft 77: int
1.77 yamt 78: ffs_update(struct vnode *vp, const struct timespec *acc,
79: const struct timespec *mod, int updflags)
1.9 christos 80: {
1.30 augustss 81: struct fs *fs;
1.1 mycroft 82: struct buf *bp;
83: struct inode *ip;
84: int error;
1.24 thorpej 85: caddr_t cp;
1.34 mycroft 86: int waitfor, flags;
1.1 mycroft 87:
1.77 yamt 88: if (vp->v_mount->mnt_flag & MNT_RDONLY)
1.11 mycroft 89: return (0);
1.77 yamt 90: ip = VTOI(vp);
91: FFS_ITIMES(ip, acc, mod, NULL);
92: if (updflags & UPDATE_CLOSE)
1.65 mycroft 93: flags = ip->i_flag & (IN_MODIFIED | IN_ACCESSED);
94: else
95: flags = ip->i_flag & IN_MODIFIED;
1.34 mycroft 96: if (flags == 0)
1.1 mycroft 97: return (0);
98: fs = ip->i_fs;
1.31 perseant 99:
1.35 mycroft 100: if ((flags & IN_MODIFIED) != 0 &&
1.77 yamt 101: (vp->v_mount->mnt_flag & MNT_ASYNC) == 0) {
102: waitfor = updflags & UPDATE_WAIT;
103: if ((updflags & UPDATE_DIROP) && !DOINGSOFTDEP(vp))
1.35 mycroft 104: waitfor |= UPDATE_WAIT;
105: } else
106: waitfor = 0;
1.31 perseant 107:
1.1 mycroft 108: /*
109: * Ensure that uid and gid are correct. This is a temporary
110: * fix until fsck has been changed to do the update.
111: */
1.55 fvdl 112: if (fs->fs_magic == FS_UFS1_MAGIC && /* XXX */
113: fs->fs_old_inodefmt < FS_44INODEFMT) { /* XXX */
114: ip->i_ffs1_ouid = ip->i_uid; /* XXX */
115: ip->i_ffs1_ogid = ip->i_gid; /* XXX */
1.18 fvdl 116: } /* XXX */
1.9 christos 117: error = bread(ip->i_devvp,
118: fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
119: (int)fs->fs_bsize, NOCRED, &bp);
120: if (error) {
1.1 mycroft 121: brelse(bp);
122: return (error);
123: }
1.35 mycroft 124: ip->i_flag &= ~(IN_MODIFIED | IN_ACCESSED);
1.77 yamt 125: if (DOINGSOFTDEP(vp))
1.31 perseant 126: softdep_update_inodeblock(ip, bp, waitfor);
1.55 fvdl 127: else if (ip->i_ffs_effnlink != ip->i_nlink)
1.29 fvdl 128: panic("ffs_update: bad link cnt");
1.55 fvdl 129: if (fs->fs_magic == FS_UFS1_MAGIC) {
130: cp = (caddr_t)bp->b_data +
131: (ino_to_fsbo(fs, ip->i_number) * DINODE1_SIZE);
1.23 christos 132: #ifdef FFS_EI
1.55 fvdl 133: if (UFS_FSNEEDSWAP(fs))
134: ffs_dinode1_swap(ip->i_din.ffs1_din,
135: (struct ufs1_dinode *)cp);
136: else
137: #endif
138: memcpy(cp, ip->i_din.ffs1_din, DINODE1_SIZE);
139: } else {
140: cp = (caddr_t)bp->b_data +
141: (ino_to_fsbo(fs, ip->i_number) * DINODE2_SIZE);
142: #ifdef FFS_EI
143: if (UFS_FSNEEDSWAP(fs))
144: ffs_dinode2_swap(ip->i_din.ffs2_din,
145: (struct ufs2_dinode *)cp);
146: else
1.23 christos 147: #endif
1.55 fvdl 148: memcpy(cp, ip->i_din.ffs2_din, DINODE2_SIZE);
149: }
1.35 mycroft 150: if (waitfor) {
1.1 mycroft 151: return (bwrite(bp));
1.29 fvdl 152: } else {
1.1 mycroft 153: bdwrite(bp);
154: return (0);
155: }
156: }
157:
158: #define SINGLE 0 /* index of single indirect block */
159: #define DOUBLE 1 /* index of double indirect block */
160: #define TRIPLE 2 /* index of triple indirect block */
161: /*
162: * Truncate the inode oip to at most length size, freeing the
163: * disk blocks.
164: */
1.9 christos 165: int
1.79.10.1 elad 166: ffs_truncate(struct vnode *ovp, off_t length, int ioflag, kauth_cred_t cred,
1.79 christos 167: struct lwp *l)
1.9 christos 168: {
1.43 chs 169: struct genfs_node *gp = VTOG(ovp);
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;
1.1 mycroft 175: int offset, size, 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);
1.70 mycroft 270: if (ovp->v_type == VREG && offset != 0 && osize > length) {
271: daddr_t lbn;
1.38 chs 272: voff_t eoz;
273:
1.77 yamt 274: error = ufs_balloc_range(ovp, length - 1, 1, cred, aflag);
1.67 mycroft 275: if (error)
1.50 chs 276: return error;
1.70 mycroft 277: lbn = lblkno(fs, length);
278: size = blksize(fs, oip, lbn);
279: eoz = MIN(lblktosize(fs, lbn) + size, osize);
1.38 chs 280: uvm_vnp_zerorange(ovp, length, eoz - length);
1.70 mycroft 281: if (round_page(eoz) > round_page(length)) {
282: simple_lock(&ovp->v_interlock);
283: error = VOP_PUTPAGES(ovp, round_page(length),
284: round_page(eoz),
1.71 mycroft 285: PGO_CLEANIT | PGO_DEACTIVATE |
286: ((ioflag & IO_SYNC) ? PGO_SYNCIO : 0));
1.70 mycroft 287: if (error)
288: return error;
289: }
1.38 chs 290: }
291:
1.43 chs 292: lockmgr(&gp->g_glock, LK_EXCLUSIVE, NULL);
1.38 chs 293:
1.29 fvdl 294: if (DOINGSOFTDEP(ovp)) {
295: if (length > 0) {
296: /*
297: * If a file is only partially truncated, then
298: * we have to clean up the data structures
299: * describing the allocation past the truncation
300: * point. Finding and deallocating those structures
301: * is a lot of work. Since partial truncation occurs
302: * rarely, we solve the problem by syncing the file
303: * so that it will have no data structures left.
304: */
1.77 yamt 305: if ((error = VOP_FSYNC(ovp, cred, FSYNC_WAIT,
1.79 christos 306: 0, 0, l)) != 0) {
1.43 chs 307: lockmgr(&gp->g_glock, LK_RELEASE, NULL);
1.29 fvdl 308: return (error);
1.52 simonb 309: }
1.51 fvdl 310: if (oip->i_flag & IN_SPACECOUNTED)
1.55 fvdl 311: fs->fs_pendingblocks -= DIP(oip, blocks);
1.29 fvdl 312: } else {
1.40 augustss 313: uvm_vnp_setsize(ovp, length);
1.29 fvdl 314: #ifdef QUOTA
1.55 fvdl 315: (void) chkdq(oip, -DIP(oip, blocks), NOCRED, 0);
1.29 fvdl 316: #endif
1.55 fvdl 317: softdep_setup_freeblocks(oip, length, 0);
1.79 christos 318: (void) vinvalbuf(ovp, 0, cred, l, 0, 0);
1.43 chs 319: lockmgr(&gp->g_glock, LK_RELEASE, NULL);
1.29 fvdl 320: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77 yamt 321: return (ffs_update(ovp, NULL, NULL, 0));
1.29 fvdl 322: }
323: }
1.55 fvdl 324: oip->i_size = length;
1.57 kristerw 325: DIP_ASSIGN(oip, size, length);
1.18 fvdl 326: uvm_vnp_setsize(ovp, length);
1.1 mycroft 327: /*
328: * Calculate index into inode's block list of
329: * last direct and indirect blocks (if any)
330: * which we want to keep. Lastblock is -1 when
331: * the file is truncated to 0.
332: */
333: lastblock = lblkno(fs, length + fs->fs_bsize - 1) - 1;
334: lastiblock[SINGLE] = lastblock - NDADDR;
335: lastiblock[DOUBLE] = lastiblock[SINGLE] - NINDIR(fs);
336: lastiblock[TRIPLE] = lastiblock[DOUBLE] - NINDIR(fs) * NINDIR(fs);
337: nblocks = btodb(fs->fs_bsize);
338: /*
339: * Update file and block pointers on disk before we start freeing
340: * blocks. If we crash before free'ing blocks below, the blocks
341: * will be returned to the free list. lastiblock values are also
342: * normalized to -1 for calls to ffs_indirtrunc below.
343: */
1.67 mycroft 344: sync = 0;
1.55 fvdl 345: for (level = TRIPLE; level >= SINGLE; level--) {
1.64 hannken 346: blks[NDADDR + level] = DIP(oip, ib[level]);
1.67 mycroft 347: if (lastiblock[level] < 0 && blks[NDADDR + level] != 0) {
348: sync = 1;
1.57 kristerw 349: DIP_ASSIGN(oip, ib[level], 0);
1.1 mycroft 350: lastiblock[level] = -1;
351: }
1.55 fvdl 352: }
353: for (i = 0; i < NDADDR; i++) {
1.64 hannken 354: blks[i] = DIP(oip, db[i]);
1.67 mycroft 355: if (i > lastblock && blks[i] != 0) {
356: sync = 1;
1.57 kristerw 357: DIP_ASSIGN(oip, db[i], 0);
1.67 mycroft 358: }
359: }
1.68 mycroft 360: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.67 mycroft 361: if (sync) {
1.77 yamt 362: error = ffs_update(ovp, NULL, NULL, UPDATE_WAIT);
1.67 mycroft 363: if (error && !allerror)
364: allerror = error;
1.55 fvdl 365: }
1.32 mycroft 366:
1.1 mycroft 367: /*
368: * Having written the new inode to disk, save its new configuration
369: * and put back the old block pointers long enough to process them.
370: * Note that we save the new block configuration so we can check it
371: * when we are done.
372: */
1.55 fvdl 373: for (i = 0; i < NDADDR; i++) {
1.64 hannken 374: bn = DIP(oip, db[i]);
375: DIP_ASSIGN(oip, db[i], blks[i]);
376: blks[i] = bn;
1.55 fvdl 377: }
378: for (i = 0; i < NIADDR; i++) {
1.64 hannken 379: bn = DIP(oip, ib[i]);
380: DIP_ASSIGN(oip, ib[i], blks[NDADDR + i]);
381: blks[NDADDR + i] = bn;
1.55 fvdl 382: }
383:
384: oip->i_size = osize;
1.57 kristerw 385: DIP_ASSIGN(oip, size, osize);
1.32 mycroft 386: error = vtruncbuf(ovp, lastblock + 1, 0, 0);
387: if (error && !allerror)
388: allerror = error;
1.1 mycroft 389:
390: /*
391: * Indirect blocks first.
392: */
393: indir_lbn[SINGLE] = -NDADDR;
394: indir_lbn[DOUBLE] = indir_lbn[SINGLE] - NINDIR(fs) - 1;
395: indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - NINDIR(fs) * NINDIR(fs) - 1;
396: for (level = TRIPLE; level >= SINGLE; level--) {
1.55 fvdl 397: if (oip->i_ump->um_fstype == UFS1)
398: bn = ufs_rw32(oip->i_ffs1_ib[level],UFS_FSNEEDSWAP(fs));
399: else
400: bn = ufs_rw64(oip->i_ffs2_ib[level],UFS_FSNEEDSWAP(fs));
1.1 mycroft 401: if (bn != 0) {
402: error = ffs_indirtrunc(oip, indir_lbn[level],
403: fsbtodb(fs, bn), lastiblock[level], level, &count);
404: if (error)
405: allerror = error;
406: blocksreleased += count;
407: if (lastiblock[level] < 0) {
1.57 kristerw 408: DIP_ASSIGN(oip, ib[level], 0);
1.63 hannken 409: ffs_blkfree(fs, oip->i_devvp, bn, fs->fs_bsize,
410: oip->i_number);
1.1 mycroft 411: blocksreleased += nblocks;
412: }
413: }
414: if (lastiblock[level] >= 0)
415: goto done;
416: }
417:
418: /*
419: * All whole direct blocks or frags.
420: */
421: for (i = NDADDR - 1; i > lastblock; i--) {
1.30 augustss 422: long bsize;
1.1 mycroft 423:
1.55 fvdl 424: if (oip->i_ump->um_fstype == UFS1)
425: bn = ufs_rw32(oip->i_ffs1_db[i], UFS_FSNEEDSWAP(fs));
426: else
427: bn = ufs_rw64(oip->i_ffs2_db[i], UFS_FSNEEDSWAP(fs));
1.1 mycroft 428: if (bn == 0)
429: continue;
1.57 kristerw 430: DIP_ASSIGN(oip, db[i], 0);
1.1 mycroft 431: bsize = blksize(fs, oip, i);
1.63 hannken 432: ffs_blkfree(fs, oip->i_devvp, bn, bsize, oip->i_number);
1.1 mycroft 433: blocksreleased += btodb(bsize);
434: }
435: if (lastblock < 0)
436: goto done;
437:
438: /*
439: * Finally, look for a change in size of the
440: * last direct block; release any frags.
441: */
1.55 fvdl 442: if (oip->i_ump->um_fstype == UFS1)
443: bn = ufs_rw32(oip->i_ffs1_db[lastblock], UFS_FSNEEDSWAP(fs));
444: else
445: bn = ufs_rw64(oip->i_ffs2_db[lastblock], UFS_FSNEEDSWAP(fs));
1.1 mycroft 446: if (bn != 0) {
447: long oldspace, newspace;
448:
449: /*
450: * Calculate amount of space we're giving
451: * back as old block size minus new block size.
452: */
453: oldspace = blksize(fs, oip, lastblock);
1.55 fvdl 454: oip->i_size = length;
1.57 kristerw 455: DIP_ASSIGN(oip, size, length);
1.1 mycroft 456: newspace = blksize(fs, oip, lastblock);
457: if (newspace == 0)
458: panic("itrunc: newspace");
459: if (oldspace - newspace > 0) {
460: /*
461: * Block number of space to be free'd is
462: * the old block # plus the number of frags
463: * required for the storage we're keeping.
464: */
465: bn += numfrags(fs, newspace);
1.63 hannken 466: ffs_blkfree(fs, oip->i_devvp, bn, oldspace - newspace,
467: oip->i_number);
1.1 mycroft 468: blocksreleased += btodb(oldspace - newspace);
469: }
470: }
1.32 mycroft 471:
1.1 mycroft 472: done:
473: #ifdef DIAGNOSTIC
474: for (level = SINGLE; level <= TRIPLE; level++)
1.64 hannken 475: if (blks[NDADDR + level] != DIP(oip, ib[level]))
1.1 mycroft 476: panic("itrunc1");
477: for (i = 0; i < NDADDR; i++)
1.64 hannken 478: if (blks[i] != DIP(oip, db[i]))
1.1 mycroft 479: panic("itrunc2");
480: if (length == 0 &&
1.32 mycroft 481: (!LIST_EMPTY(&ovp->v_cleanblkhd) || !LIST_EMPTY(&ovp->v_dirtyblkhd)))
1.1 mycroft 482: panic("itrunc3");
483: #endif /* DIAGNOSTIC */
484: /*
485: * Put back the real size.
486: */
1.55 fvdl 487: oip->i_size = length;
1.57 kristerw 488: DIP_ASSIGN(oip, size, length);
489: DIP_ADD(oip, blocks, -blocksreleased);
1.43 chs 490: lockmgr(&gp->g_glock, LK_RELEASE, NULL);
1.1 mycroft 491: oip->i_flag |= IN_CHANGE;
492: #ifdef QUOTA
493: (void) chkdq(oip, -blocksreleased, NOCRED, 0);
494: #endif
1.55 fvdl 495: KASSERT(ovp->v_type != VREG || ovp->v_size == oip->i_size);
1.1 mycroft 496: return (allerror);
497: }
498:
499: /*
500: * Release blocks associated with the inode ip and stored in the indirect
501: * block bn. Blocks are free'd in LIFO order up to (but not including)
502: * lastbn. If level is greater than SINGLE, the block is an indirect block
503: * and recursive calls to indirtrunc must be used to cleanse other indirect
504: * blocks.
505: *
506: * NB: triple indirect blocks are untested.
507: */
508: static int
1.72 thorpej 509: ffs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn,
510: int level, int64_t *countp)
1.1 mycroft 511: {
1.30 augustss 512: int i;
1.1 mycroft 513: struct buf *bp;
1.30 augustss 514: struct fs *fs = ip->i_fs;
1.55 fvdl 515: int32_t *bap1 = NULL;
516: int64_t *bap2 = NULL;
1.1 mycroft 517: struct vnode *vp;
1.53 fvdl 518: daddr_t nb, nlbn, last;
1.55 fvdl 519: char *copy = NULL;
520: int64_t blkcount, factor, blocksreleased = 0;
521: int nblocks;
1.1 mycroft 522: int error = 0, allerror = 0;
1.55 fvdl 523: #ifdef FFS_EI
524: const int needswap = UFS_FSNEEDSWAP(fs);
525: #endif
526: #define RBAP(ip, i) (((ip)->i_ump->um_fstype == UFS1) ? \
527: ufs_rw32(bap1[i], needswap) : ufs_rw64(bap2[i], needswap))
1.57 kristerw 528: #define BAP_ASSIGN(ip, i, value) \
529: do { \
530: if ((ip)->i_ump->um_fstype == UFS1) \
531: bap1[i] = (value); \
532: else \
533: bap2[i] = (value); \
534: } while(0)
1.1 mycroft 535:
536: /*
537: * Calculate index in current block of last
538: * block to be kept. -1 indicates the entire
539: * block so we need not calculate the index.
540: */
541: factor = 1;
542: for (i = SINGLE; i < level; i++)
543: factor *= NINDIR(fs);
544: last = lastbn;
545: if (lastbn > 0)
546: last /= factor;
547: nblocks = btodb(fs->fs_bsize);
548: /*
549: * Get buffer of block pointers, zero those entries corresponding
550: * to blocks to be free'd, and update on disk copy first. Since
551: * double(triple) indirect before single(double) indirect, calls
552: * to bmap on these blocks will fail. However, we already have
553: * the on disk address, so we have to set the b_blkno field
554: * explicitly instead of letting bread do everything for us.
555: */
556: vp = ITOV(ip);
557: bp = getblk(vp, lbn, (int)fs->fs_bsize, 0, 0);
558: if (bp->b_flags & (B_DONE | B_DELWRI)) {
559: /* Braces must be here in case trace evaluates to nothing. */
560: trace(TR_BREADHIT, pack(vp, fs->fs_bsize), lbn);
561: } else {
562: trace(TR_BREADMISS, pack(vp, fs->fs_bsize), lbn);
563: curproc->p_stats->p_ru.ru_inblock++; /* pay for read */
564: bp->b_flags |= B_READ;
565: if (bp->b_bcount > bp->b_bufsize)
566: panic("ffs_indirtrunc: bad buffer size");
567: bp->b_blkno = dbn;
1.61 yamt 568: BIO_SETPRIO(bp, BPRIO_TIMECRITICAL);
1.62 hannken 569: VOP_STRATEGY(vp, bp);
1.1 mycroft 570: error = biowait(bp);
571: }
572: if (error) {
573: brelse(bp);
574: *countp = 0;
575: return (error);
576: }
577:
1.55 fvdl 578: if (ip->i_ump->um_fstype == UFS1)
579: bap1 = (int32_t *)bp->b_data;
580: else
581: bap2 = (int64_t *)bp->b_data;
1.33 mycroft 582: if (lastbn >= 0) {
1.55 fvdl 583: copy = malloc(fs->fs_bsize, M_TEMP, M_WAITOK);
584: memcpy((caddr_t)copy, bp->b_data, (u_int)fs->fs_bsize);
585: for (i = last + 1; i < NINDIR(fs); i++)
1.57 kristerw 586: BAP_ASSIGN(ip, i, 0);
1.12 thorpej 587: error = bwrite(bp);
588: if (error)
589: allerror = error;
1.55 fvdl 590: if (ip->i_ump->um_fstype == UFS1)
591: bap1 = (int32_t *)copy;
592: else
593: bap2 = (int64_t *)copy;
1.12 thorpej 594: }
1.1 mycroft 595:
596: /*
597: * Recursively free totally unused blocks.
598: */
599: for (i = NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
600: i--, nlbn += factor) {
1.55 fvdl 601: nb = RBAP(ip, i);
1.1 mycroft 602: if (nb == 0)
603: continue;
604: if (level > SINGLE) {
1.9 christos 605: error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
1.53 fvdl 606: (daddr_t)-1, level - 1,
1.9 christos 607: &blkcount);
608: if (error)
1.1 mycroft 609: allerror = error;
610: blocksreleased += blkcount;
611: }
1.63 hannken 612: ffs_blkfree(fs, ip->i_devvp, nb, fs->fs_bsize, ip->i_number);
1.1 mycroft 613: blocksreleased += nblocks;
614: }
615:
616: /*
617: * Recursively free last partial block.
618: */
619: if (level > SINGLE && lastbn >= 0) {
620: last = lastbn % factor;
1.55 fvdl 621: nb = RBAP(ip, i);
1.1 mycroft 622: if (nb != 0) {
1.9 christos 623: error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
624: last, level - 1, &blkcount);
625: if (error)
1.1 mycroft 626: allerror = error;
627: blocksreleased += blkcount;
628: }
629: }
1.12 thorpej 630:
631: if (copy != NULL) {
632: FREE(copy, M_TEMP);
633: } else {
634: bp->b_flags |= B_INVAL;
635: brelse(bp);
636: }
637:
1.1 mycroft 638: *countp = blocksreleased;
639: return (allerror);
640: }
1.74 drochner 641:
642: void
643: ffs_itimes(struct inode *ip, const struct timespec *acc,
644: const struct timespec *mod, const struct timespec *cre)
645: {
646: struct timespec *ts = NULL, tsb;
1.75 christos 647:
1.76 yamt 648: if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) {
649: return;
650: }
1.75 christos 651:
1.74 drochner 652: if (ip->i_flag & IN_ACCESS) {
653: if (acc == NULL)
1.79.10.2! elad 654: acc = ts = nanotime(&tsb);
1.74 drochner 655: DIP_ASSIGN(ip, atime, acc->tv_sec);
656: DIP_ASSIGN(ip, atimensec, acc->tv_nsec);
657: }
658: if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
659: if ((ip->i_flags & SF_SNAPSHOT) == 0) {
660: if (mod == NULL)
661: mod = ts == NULL ? (ts = nanotime(&tsb)) : ts;
662: DIP_ASSIGN(ip, mtime, mod->tv_sec);
663: DIP_ASSIGN(ip, mtimensec, mod->tv_nsec);
664: }
665: ip->i_modrev++;
666: }
667: if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
668: if (cre == NULL)
669: cre = ts == NULL ? (ts = nanotime(&tsb)) : ts;
670: DIP_ASSIGN(ip, ctime, cre->tv_sec);
671: DIP_ASSIGN(ip, ctimensec, cre->tv_nsec);
672: }
673: if (ip->i_flag & (IN_ACCESS | IN_MODIFY))
674: ip->i_flag |= IN_ACCESSED;
675: if (ip->i_flag & (IN_UPDATE | IN_CHANGE))
676: ip->i_flag |= IN_MODIFIED;
677: ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
678: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to ffs_inode.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sys / ufs / ffs