Annotation of src/sys/ufs/ffs/ffs_inode.c, Revision 1.104.6.1
1.104.6.1! jruoho 1: /* $NetBSD: ffs_inode.c,v 1.105 2011/03/06 17:08:38 bouyer Exp $ */
1.98 simonb 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>
1.104.6.1! jruoho 64: __KERNEL_RCSID(0, "$NetBSD: ffs_inode.c,v 1.105 2011/03/06 17:08:38 bouyer 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>
1.98 simonb 73: #include <sys/buf.h>
1.1 mycroft 74: #include <sys/file.h>
1.98 simonb 75: #include <sys/fstrans.h>
76: #include <sys/kauth.h>
1.1 mycroft 77: #include <sys/kernel.h>
78: #include <sys/malloc.h>
1.98 simonb 79: #include <sys/mount.h>
80: #include <sys/proc.h>
81: #include <sys/resourcevar.h>
1.1 mycroft 82: #include <sys/trace.h>
1.98 simonb 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>
1.98 simonb 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
1.103 ad 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;
1.103 ad 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)),
1.96 hannken 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);
1.98 simonb 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) {
1.104 bouyer 241: /* still do a uvm_vnp_setsize() as writesize may be larger */
242: uvm_vnp_setsize(ovp, length);
1.1 mycroft 243: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77 yamt 244: return (ffs_update(ovp, NULL, NULL, 0));
1.1 mycroft 245: }
246: fs = oip->i_fs;
1.68 mycroft 247: if (length > ump->um_maxfilesize)
1.38 chs 248: return (EFBIG);
249:
1.63 hannken 250: if ((oip->i_flags & SF_SNAPSHOT) != 0)
251: ffs_snapremove(ovp);
252:
1.55 fvdl 253: osize = oip->i_size;
1.50 chs 254: aflag = ioflag & IO_SYNC ? B_SYNC : 0;
1.29 fvdl 255:
1.38 chs 256: /*
257: * Lengthen the size of the file. We must ensure that the
258: * last byte of the file is allocated. Since the smallest
259: * value of osize is 0, length will be at least 1.
260: */
261:
262: if (osize < length) {
1.48 chs 263: if (lblkno(fs, osize) < NDADDR &&
264: lblkno(fs, osize) != lblkno(fs, length) &&
265: blkroundup(fs, osize) != osize) {
1.69 mycroft 266: off_t eob;
267:
268: eob = blkroundup(fs, osize);
1.87 yamt 269: uvm_vnp_setwritesize(ovp, eob);
1.69 mycroft 270: error = ufs_balloc_range(ovp, osize, eob - osize,
1.77 yamt 271: cred, aflag);
1.68 mycroft 272: if (error)
1.48 chs 273: return error;
274: if (ioflag & IO_SYNC) {
1.93 ad 275: mutex_enter(&ovp->v_interlock);
1.49 chs 276: VOP_PUTPAGES(ovp,
1.69 mycroft 277: trunc_page(osize & fs->fs_bmask),
1.99 hannken 278: round_page(eob), PGO_CLEANIT | PGO_SYNCIO |
279: PGO_JOURNALLOCKED);
1.48 chs 280: }
281: }
1.87 yamt 282: uvm_vnp_setwritesize(ovp, length);
1.77 yamt 283: error = ufs_balloc_range(ovp, length - 1, 1, cred, aflag);
1.45 chs 284: if (error) {
1.92 pooka 285: (void) ffs_truncate(ovp, osize, ioflag & IO_SYNC, cred);
1.68 mycroft 286: return (error);
1.45 chs 287: }
1.43 chs 288: uvm_vnp_setsize(ovp, length);
1.38 chs 289: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.55 fvdl 290: KASSERT(ovp->v_size == oip->i_size);
1.77 yamt 291: return (ffs_update(ovp, NULL, NULL, 0));
1.38 chs 292: }
293:
294: /*
295: * When truncating a regular file down to a non-block-aligned size,
296: * we must zero the part of last block which is past the new EOF.
297: * We must synchronously flush the zeroed pages to disk
298: * since the new pages will be invalidated as soon as we
299: * inform the VM system of the new, smaller size.
1.48 chs 300: * We must do this before acquiring the GLOCK, since fetching
1.38 chs 301: * the pages will acquire the GLOCK internally.
302: * So there is a window where another thread could see a whole
303: * zeroed page past EOF, but that's life.
304: */
305:
306: offset = blkoff(fs, length);
1.85 yamt 307: pgoffset = length & PAGE_MASK;
308: if (ovp->v_type == VREG && (pgoffset != 0 || offset != 0) &&
309: osize > length) {
1.70 mycroft 310: daddr_t lbn;
1.38 chs 311: voff_t eoz;
1.85 yamt 312: int size;
1.38 chs 313:
1.85 yamt 314: if (offset != 0) {
315: error = ufs_balloc_range(ovp, length - 1, 1, cred,
316: aflag);
317: if (error)
318: return error;
319: }
1.70 mycroft 320: lbn = lblkno(fs, length);
321: size = blksize(fs, oip, lbn);
1.85 yamt 322: eoz = MIN(MAX(lblktosize(fs, lbn) + size, round_page(pgoffset)),
323: osize);
1.38 chs 324: uvm_vnp_zerorange(ovp, length, eoz - length);
1.70 mycroft 325: if (round_page(eoz) > round_page(length)) {
1.93 ad 326: mutex_enter(&ovp->v_interlock);
1.70 mycroft 327: error = VOP_PUTPAGES(ovp, round_page(length),
328: round_page(eoz),
1.99 hannken 329: PGO_CLEANIT | PGO_DEACTIVATE | PGO_JOURNALLOCKED |
1.71 mycroft 330: ((ioflag & IO_SYNC) ? PGO_SYNCIO : 0));
1.70 mycroft 331: if (error)
332: return error;
333: }
1.38 chs 334: }
335:
1.84 yamt 336: genfs_node_wrlock(ovp);
1.55 fvdl 337: oip->i_size = length;
1.57 kristerw 338: DIP_ASSIGN(oip, size, length);
1.18 fvdl 339: uvm_vnp_setsize(ovp, length);
1.1 mycroft 340: /*
341: * Calculate index into inode's block list of
342: * last direct and indirect blocks (if any)
343: * which we want to keep. Lastblock is -1 when
344: * the file is truncated to 0.
345: */
346: lastblock = lblkno(fs, length + fs->fs_bsize - 1) - 1;
347: lastiblock[SINGLE] = lastblock - NDADDR;
348: lastiblock[DOUBLE] = lastiblock[SINGLE] - NINDIR(fs);
349: lastiblock[TRIPLE] = lastiblock[DOUBLE] - NINDIR(fs) * NINDIR(fs);
350: nblocks = btodb(fs->fs_bsize);
351: /*
352: * Update file and block pointers on disk before we start freeing
353: * blocks. If we crash before free'ing blocks below, the blocks
354: * will be returned to the free list. lastiblock values are also
355: * normalized to -1 for calls to ffs_indirtrunc below.
356: */
1.67 mycroft 357: sync = 0;
1.55 fvdl 358: for (level = TRIPLE; level >= SINGLE; level--) {
1.64 hannken 359: blks[NDADDR + level] = DIP(oip, ib[level]);
1.67 mycroft 360: if (lastiblock[level] < 0 && blks[NDADDR + level] != 0) {
361: sync = 1;
1.57 kristerw 362: DIP_ASSIGN(oip, ib[level], 0);
1.1 mycroft 363: lastiblock[level] = -1;
364: }
1.55 fvdl 365: }
366: for (i = 0; i < NDADDR; i++) {
1.64 hannken 367: blks[i] = DIP(oip, db[i]);
1.67 mycroft 368: if (i > lastblock && blks[i] != 0) {
369: sync = 1;
1.57 kristerw 370: DIP_ASSIGN(oip, db[i], 0);
1.67 mycroft 371: }
372: }
1.68 mycroft 373: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.67 mycroft 374: if (sync) {
1.77 yamt 375: error = ffs_update(ovp, NULL, NULL, UPDATE_WAIT);
1.67 mycroft 376: if (error && !allerror)
377: allerror = error;
1.55 fvdl 378: }
1.32 mycroft 379:
1.1 mycroft 380: /*
381: * Having written the new inode to disk, save its new configuration
382: * and put back the old block pointers long enough to process them.
383: * Note that we save the new block configuration so we can check it
384: * when we are done.
385: */
1.55 fvdl 386: for (i = 0; i < NDADDR; i++) {
1.64 hannken 387: bn = DIP(oip, db[i]);
388: DIP_ASSIGN(oip, db[i], blks[i]);
389: blks[i] = bn;
1.55 fvdl 390: }
391: for (i = 0; i < NIADDR; i++) {
1.64 hannken 392: bn = DIP(oip, ib[i]);
393: DIP_ASSIGN(oip, ib[i], blks[NDADDR + i]);
394: blks[NDADDR + i] = bn;
1.55 fvdl 395: }
396:
397: oip->i_size = osize;
1.57 kristerw 398: DIP_ASSIGN(oip, size, osize);
1.32 mycroft 399: error = vtruncbuf(ovp, lastblock + 1, 0, 0);
400: if (error && !allerror)
401: allerror = error;
1.1 mycroft 402:
403: /*
404: * Indirect blocks first.
405: */
406: indir_lbn[SINGLE] = -NDADDR;
407: indir_lbn[DOUBLE] = indir_lbn[SINGLE] - NINDIR(fs) - 1;
408: indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - NINDIR(fs) * NINDIR(fs) - 1;
409: for (level = TRIPLE; level >= SINGLE; level--) {
1.55 fvdl 410: if (oip->i_ump->um_fstype == UFS1)
411: bn = ufs_rw32(oip->i_ffs1_ib[level],UFS_FSNEEDSWAP(fs));
412: else
413: bn = ufs_rw64(oip->i_ffs2_ib[level],UFS_FSNEEDSWAP(fs));
1.1 mycroft 414: if (bn != 0) {
415: error = ffs_indirtrunc(oip, indir_lbn[level],
416: fsbtodb(fs, bn), lastiblock[level], level, &count);
417: if (error)
418: allerror = error;
419: blocksreleased += count;
420: if (lastiblock[level] < 0) {
1.57 kristerw 421: DIP_ASSIGN(oip, ib[level], 0);
1.98 simonb 422: if (oip->i_ump->um_mountp->mnt_wapbl) {
423: UFS_WAPBL_REGISTER_DEALLOCATION(
424: oip->i_ump->um_mountp,
425: fsbtodb(fs, bn), fs->fs_bsize);
426: } else
427: ffs_blkfree(fs, oip->i_devvp, bn,
428: fs->fs_bsize, oip->i_number);
1.1 mycroft 429: blocksreleased += nblocks;
430: }
431: }
432: if (lastiblock[level] >= 0)
433: goto done;
434: }
435:
436: /*
437: * All whole direct blocks or frags.
438: */
439: for (i = NDADDR - 1; i > lastblock; i--) {
1.30 augustss 440: long bsize;
1.1 mycroft 441:
1.55 fvdl 442: if (oip->i_ump->um_fstype == UFS1)
443: bn = ufs_rw32(oip->i_ffs1_db[i], UFS_FSNEEDSWAP(fs));
444: else
445: bn = ufs_rw64(oip->i_ffs2_db[i], UFS_FSNEEDSWAP(fs));
1.1 mycroft 446: if (bn == 0)
447: continue;
1.57 kristerw 448: DIP_ASSIGN(oip, db[i], 0);
1.1 mycroft 449: bsize = blksize(fs, oip, i);
1.98 simonb 450: if ((oip->i_ump->um_mountp->mnt_wapbl) &&
451: (ovp->v_type != VREG)) {
452: UFS_WAPBL_REGISTER_DEALLOCATION(oip->i_ump->um_mountp,
453: fsbtodb(fs, bn), bsize);
454: } else
455: ffs_blkfree(fs, oip->i_devvp, bn, bsize, oip->i_number);
1.1 mycroft 456: blocksreleased += btodb(bsize);
457: }
458: if (lastblock < 0)
459: goto done;
460:
461: /*
462: * Finally, look for a change in size of the
463: * last direct block; release any frags.
464: */
1.55 fvdl 465: if (oip->i_ump->um_fstype == UFS1)
466: bn = ufs_rw32(oip->i_ffs1_db[lastblock], UFS_FSNEEDSWAP(fs));
467: else
468: bn = ufs_rw64(oip->i_ffs2_db[lastblock], UFS_FSNEEDSWAP(fs));
1.1 mycroft 469: if (bn != 0) {
470: long oldspace, newspace;
471:
472: /*
473: * Calculate amount of space we're giving
474: * back as old block size minus new block size.
475: */
476: oldspace = blksize(fs, oip, lastblock);
1.55 fvdl 477: oip->i_size = length;
1.57 kristerw 478: DIP_ASSIGN(oip, size, length);
1.1 mycroft 479: newspace = blksize(fs, oip, lastblock);
480: if (newspace == 0)
481: panic("itrunc: newspace");
482: if (oldspace - newspace > 0) {
483: /*
484: * Block number of space to be free'd is
485: * the old block # plus the number of frags
486: * required for the storage we're keeping.
487: */
488: bn += numfrags(fs, newspace);
1.98 simonb 489: if ((oip->i_ump->um_mountp->mnt_wapbl) &&
490: (ovp->v_type != VREG)) {
491: UFS_WAPBL_REGISTER_DEALLOCATION(
492: oip->i_ump->um_mountp, fsbtodb(fs, bn),
493: oldspace - newspace);
494: } else
495: ffs_blkfree(fs, oip->i_devvp, bn,
496: oldspace - newspace, oip->i_number);
1.1 mycroft 497: blocksreleased += btodb(oldspace - newspace);
498: }
499: }
1.32 mycroft 500:
1.1 mycroft 501: done:
502: #ifdef DIAGNOSTIC
503: for (level = SINGLE; level <= TRIPLE; level++)
1.64 hannken 504: if (blks[NDADDR + level] != DIP(oip, ib[level]))
1.1 mycroft 505: panic("itrunc1");
506: for (i = 0; i < NDADDR; i++)
1.64 hannken 507: if (blks[i] != DIP(oip, db[i]))
1.1 mycroft 508: panic("itrunc2");
509: if (length == 0 &&
1.32 mycroft 510: (!LIST_EMPTY(&ovp->v_cleanblkhd) || !LIST_EMPTY(&ovp->v_dirtyblkhd)))
1.1 mycroft 511: panic("itrunc3");
512: #endif /* DIAGNOSTIC */
513: /*
514: * Put back the real size.
515: */
1.55 fvdl 516: oip->i_size = length;
1.57 kristerw 517: DIP_ASSIGN(oip, size, length);
518: DIP_ADD(oip, blocks, -blocksreleased);
1.84 yamt 519: genfs_node_unlock(ovp);
1.1 mycroft 520: oip->i_flag |= IN_CHANGE;
1.98 simonb 521: UFS_WAPBL_UPDATE(ovp, NULL, NULL, 0);
1.104.6.1! jruoho 522: #if defined(QUOTA) || defined(QUOTA2)
1.1 mycroft 523: (void) chkdq(oip, -blocksreleased, NOCRED, 0);
524: #endif
1.55 fvdl 525: KASSERT(ovp->v_type != VREG || ovp->v_size == oip->i_size);
1.1 mycroft 526: return (allerror);
527: }
528:
529: /*
530: * Release blocks associated with the inode ip and stored in the indirect
531: * block bn. Blocks are free'd in LIFO order up to (but not including)
532: * lastbn. If level is greater than SINGLE, the block is an indirect block
533: * and recursive calls to indirtrunc must be used to cleanse other indirect
534: * blocks.
535: *
536: * NB: triple indirect blocks are untested.
537: */
538: static int
1.72 thorpej 539: ffs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn,
540: int level, int64_t *countp)
1.1 mycroft 541: {
1.30 augustss 542: int i;
1.1 mycroft 543: struct buf *bp;
1.30 augustss 544: struct fs *fs = ip->i_fs;
1.55 fvdl 545: int32_t *bap1 = NULL;
546: int64_t *bap2 = NULL;
1.1 mycroft 547: struct vnode *vp;
1.53 fvdl 548: daddr_t nb, nlbn, last;
1.55 fvdl 549: char *copy = NULL;
550: int64_t blkcount, factor, blocksreleased = 0;
551: int nblocks;
1.1 mycroft 552: int error = 0, allerror = 0;
1.55 fvdl 553: #ifdef FFS_EI
554: const int needswap = UFS_FSNEEDSWAP(fs);
555: #endif
556: #define RBAP(ip, i) (((ip)->i_ump->um_fstype == UFS1) ? \
557: ufs_rw32(bap1[i], needswap) : ufs_rw64(bap2[i], needswap))
1.57 kristerw 558: #define BAP_ASSIGN(ip, i, value) \
559: do { \
560: if ((ip)->i_ump->um_fstype == UFS1) \
561: bap1[i] = (value); \
562: else \
563: bap2[i] = (value); \
564: } while(0)
1.1 mycroft 565:
566: /*
567: * Calculate index in current block of last
568: * block to be kept. -1 indicates the entire
569: * block so we need not calculate the index.
570: */
571: factor = 1;
572: for (i = SINGLE; i < level; i++)
573: factor *= NINDIR(fs);
574: last = lastbn;
575: if (lastbn > 0)
576: last /= factor;
577: nblocks = btodb(fs->fs_bsize);
578: /*
579: * Get buffer of block pointers, zero those entries corresponding
580: * to blocks to be free'd, and update on disk copy first. Since
581: * double(triple) indirect before single(double) indirect, calls
582: * to bmap on these blocks will fail. However, we already have
583: * the on disk address, so we have to set the b_blkno field
584: * explicitly instead of letting bread do everything for us.
585: */
586: vp = ITOV(ip);
1.97 hannken 587: error = ffs_getblk(vp, lbn, FFS_NOBLK, fs->fs_bsize, false, &bp);
588: if (error) {
589: *countp = 0;
590: return error;
591: }
1.93 ad 592: if (bp->b_oflags & (BO_DONE | BO_DELWRI)) {
1.1 mycroft 593: /* Braces must be here in case trace evaluates to nothing. */
594: trace(TR_BREADHIT, pack(vp, fs->fs_bsize), lbn);
595: } else {
596: trace(TR_BREADMISS, pack(vp, fs->fs_bsize), lbn);
1.95 ad 597: curlwp->l_ru.ru_inblock++; /* pay for read */
1.1 mycroft 598: bp->b_flags |= B_READ;
1.97 hannken 599: bp->b_flags &= ~B_COWDONE; /* we change blkno below */
1.1 mycroft 600: if (bp->b_bcount > bp->b_bufsize)
601: panic("ffs_indirtrunc: bad buffer size");
602: bp->b_blkno = dbn;
1.61 yamt 603: BIO_SETPRIO(bp, BPRIO_TIMECRITICAL);
1.62 hannken 604: VOP_STRATEGY(vp, bp);
1.1 mycroft 605: error = biowait(bp);
1.97 hannken 606: if (error == 0)
607: error = fscow_run(bp, true);
1.1 mycroft 608: }
609: if (error) {
1.89 ad 610: brelse(bp, 0);
1.1 mycroft 611: *countp = 0;
612: return (error);
613: }
614:
1.55 fvdl 615: if (ip->i_ump->um_fstype == UFS1)
616: bap1 = (int32_t *)bp->b_data;
617: else
618: bap2 = (int64_t *)bp->b_data;
1.33 mycroft 619: if (lastbn >= 0) {
1.55 fvdl 620: copy = malloc(fs->fs_bsize, M_TEMP, M_WAITOK);
1.86 christos 621: memcpy((void *)copy, bp->b_data, (u_int)fs->fs_bsize);
1.55 fvdl 622: for (i = last + 1; i < NINDIR(fs); i++)
1.57 kristerw 623: BAP_ASSIGN(ip, i, 0);
1.12 thorpej 624: error = bwrite(bp);
625: if (error)
626: allerror = error;
1.55 fvdl 627: if (ip->i_ump->um_fstype == UFS1)
628: bap1 = (int32_t *)copy;
629: else
630: bap2 = (int64_t *)copy;
1.12 thorpej 631: }
1.1 mycroft 632:
633: /*
634: * Recursively free totally unused blocks.
635: */
636: for (i = NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
637: i--, nlbn += factor) {
1.55 fvdl 638: nb = RBAP(ip, i);
1.1 mycroft 639: if (nb == 0)
640: continue;
641: if (level > SINGLE) {
1.9 christos 642: error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
1.53 fvdl 643: (daddr_t)-1, level - 1,
1.9 christos 644: &blkcount);
645: if (error)
1.1 mycroft 646: allerror = error;
647: blocksreleased += blkcount;
648: }
1.98 simonb 649: if ((ip->i_ump->um_mountp->mnt_wapbl) &&
650: ((level > SINGLE) || (ITOV(ip)->v_type != VREG))) {
651: UFS_WAPBL_REGISTER_DEALLOCATION(ip->i_ump->um_mountp,
652: fsbtodb(fs, nb), fs->fs_bsize);
653: } else
654: ffs_blkfree(fs, ip->i_devvp, nb, fs->fs_bsize,
655: ip->i_number);
1.1 mycroft 656: blocksreleased += nblocks;
657: }
658:
659: /*
660: * Recursively free last partial block.
661: */
662: if (level > SINGLE && lastbn >= 0) {
663: last = lastbn % factor;
1.55 fvdl 664: nb = RBAP(ip, i);
1.1 mycroft 665: if (nb != 0) {
1.9 christos 666: error = ffs_indirtrunc(ip, nlbn, fsbtodb(fs, nb),
667: last, level - 1, &blkcount);
668: if (error)
1.1 mycroft 669: allerror = error;
670: blocksreleased += blkcount;
671: }
672: }
1.12 thorpej 673:
674: if (copy != NULL) {
1.100 cegger 675: free(copy, M_TEMP);
1.12 thorpej 676: } else {
1.89 ad 677: brelse(bp, BC_INVAL);
1.12 thorpej 678: }
679:
1.1 mycroft 680: *countp = blocksreleased;
681: return (allerror);
682: }
1.74 drochner 683:
684: void
685: ffs_itimes(struct inode *ip, const struct timespec *acc,
686: const struct timespec *mod, const struct timespec *cre)
687: {
1.82 kardel 688: struct timespec now;
1.75 christos 689:
1.76 yamt 690: if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) {
691: return;
692: }
1.75 christos 693:
1.83 yamt 694: vfs_timestamp(&now);
1.74 drochner 695: if (ip->i_flag & IN_ACCESS) {
696: if (acc == NULL)
1.82 kardel 697: acc = &now;
1.74 drochner 698: DIP_ASSIGN(ip, atime, acc->tv_sec);
699: DIP_ASSIGN(ip, atimensec, acc->tv_nsec);
700: }
701: if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
702: if ((ip->i_flags & SF_SNAPSHOT) == 0) {
703: if (mod == NULL)
1.82 kardel 704: mod = &now;
1.74 drochner 705: DIP_ASSIGN(ip, mtime, mod->tv_sec);
706: DIP_ASSIGN(ip, mtimensec, mod->tv_nsec);
707: }
708: ip->i_modrev++;
709: }
710: if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
711: if (cre == NULL)
1.82 kardel 712: cre = &now;
1.74 drochner 713: DIP_ASSIGN(ip, ctime, cre->tv_sec);
714: DIP_ASSIGN(ip, ctimensec, cre->tv_nsec);
715: }
716: if (ip->i_flag & (IN_ACCESS | IN_MODIFY))
717: ip->i_flag |= IN_ACCESSED;
718: if (ip->i_flag & (IN_UPDATE | IN_CHANGE))
719: ip->i_flag |= IN_MODIFIED;
720: ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
721: }
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