Annotation of src/sys/ufs/ffs/ffs_inode.c, Revision 1.124
1.124 ! riastrad 1: /* $NetBSD: ffs_inode.c,v 1.123 2016/11/11 10:50:16 hannken 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>
1.124 ! riastrad 64: __KERNEL_RCSID(0, "$NetBSD: ffs_inode.c,v 1.123 2016/11/11 10:50:16 hannken 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>
1.109 para 78: #include <sys/kmem.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,
1.114 dholland 151: FFS_FSBTODB(fs, ino_to_fsba(fs, ip->i_number)),
1.117 maxv 152: (int)fs->fs_bsize, B_MODIFY, &bp);
1.9 christos 153: if (error) {
1.1 mycroft 154: return (error);
155: }
1.35 mycroft 156: ip->i_flag &= ~(IN_MODIFIED | IN_ACCESSED);
1.98 simonb 157: /* Keep unlinked inode list up to date */
1.110 matt 158: KDASSERTMSG(DIP(ip, nlink) == ip->i_nlink,
159: "DIP(ip, nlink) [%d] == ip->i_nlink [%d]",
160: DIP(ip, nlink), ip->i_nlink);
1.98 simonb 161: if (ip->i_mode) {
162: if (ip->i_nlink > 0) {
163: UFS_WAPBL_UNREGISTER_INODE(ip->i_ump->um_mountp,
164: ip->i_number, ip->i_mode);
165: } else {
166: UFS_WAPBL_REGISTER_INODE(ip->i_ump->um_mountp,
167: ip->i_number, ip->i_mode);
168: }
169: }
1.55 fvdl 170: if (fs->fs_magic == FS_UFS1_MAGIC) {
1.86 christos 171: cp = (char *)bp->b_data +
1.55 fvdl 172: (ino_to_fsbo(fs, ip->i_number) * DINODE1_SIZE);
1.23 christos 173: #ifdef FFS_EI
1.55 fvdl 174: if (UFS_FSNEEDSWAP(fs))
175: ffs_dinode1_swap(ip->i_din.ffs1_din,
176: (struct ufs1_dinode *)cp);
177: else
178: #endif
179: memcpy(cp, ip->i_din.ffs1_din, DINODE1_SIZE);
180: } else {
1.86 christos 181: cp = (char *)bp->b_data +
1.55 fvdl 182: (ino_to_fsbo(fs, ip->i_number) * DINODE2_SIZE);
183: #ifdef FFS_EI
184: if (UFS_FSNEEDSWAP(fs))
185: ffs_dinode2_swap(ip->i_din.ffs2_din,
186: (struct ufs2_dinode *)cp);
187: else
1.23 christos 188: #endif
1.55 fvdl 189: memcpy(cp, ip->i_din.ffs2_din, DINODE2_SIZE);
190: }
1.35 mycroft 191: if (waitfor) {
1.1 mycroft 192: return (bwrite(bp));
1.29 fvdl 193: } else {
1.1 mycroft 194: bdwrite(bp);
195: return (0);
196: }
197: }
198:
199: #define SINGLE 0 /* index of single indirect block */
200: #define DOUBLE 1 /* index of double indirect block */
201: #define TRIPLE 2 /* index of triple indirect block */
202: /*
203: * Truncate the inode oip to at most length size, freeing the
204: * disk blocks.
205: */
1.9 christos 206: int
1.92 pooka 207: ffs_truncate(struct vnode *ovp, off_t length, int ioflag, kauth_cred_t cred)
1.9 christos 208: {
1.53 fvdl 209: daddr_t lastblock;
1.68 mycroft 210: struct inode *oip = VTOI(ovp);
1.112 dholland 211: daddr_t bn, lastiblock[UFS_NIADDR], indir_lbn[UFS_NIADDR];
212: daddr_t blks[UFS_NDADDR + UFS_NIADDR];
1.30 augustss 213: struct fs *fs;
1.85 yamt 214: int offset, pgoffset, level;
1.118 jdolecek 215: int64_t blocksreleased = 0;
1.77 yamt 216: int i, aflag, nblocks;
1.38 chs 217: int error, allerror = 0;
1.1 mycroft 218: off_t osize;
1.67 mycroft 219: int sync;
1.68 mycroft 220: struct ufsmount *ump = oip->i_ump;
1.122 jdolecek 221: void *dcookie;
1.1 mycroft 222:
1.118 jdolecek 223: UFS_WAPBL_JLOCK_ASSERT(ip->i_ump->um_mountp);
224:
1.78 yamt 225: if (ovp->v_type == VCHR || ovp->v_type == VBLK ||
226: ovp->v_type == VFIFO || ovp->v_type == VSOCK) {
227: KASSERT(oip->i_size == 0);
228: return 0;
229: }
230:
1.2 pk 231: if (length < 0)
1.3 mycroft 232: return (EINVAL);
1.68 mycroft 233:
1.1 mycroft 234: if (ovp->v_type == VLNK &&
1.68 mycroft 235: (oip->i_size < ump->um_maxsymlinklen ||
236: (ump->um_maxsymlinklen == 0 && DIP(oip, blocks) == 0))) {
1.38 chs 237: KDASSERT(length == 0);
1.55 fvdl 238: memset(SHORTLINK(oip), 0, (size_t)oip->i_size);
239: oip->i_size = 0;
1.57 kristerw 240: DIP_ASSIGN(oip, size, 0);
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: }
1.55 fvdl 244: if (oip->i_size == length) {
1.104 bouyer 245: /* still do a uvm_vnp_setsize() as writesize may be larger */
246: uvm_vnp_setsize(ovp, length);
1.1 mycroft 247: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.77 yamt 248: return (ffs_update(ovp, NULL, NULL, 0));
1.1 mycroft 249: }
250: fs = oip->i_fs;
1.68 mycroft 251: if (length > ump->um_maxfilesize)
1.38 chs 252: return (EFBIG);
253:
1.63 hannken 254: if ((oip->i_flags & SF_SNAPSHOT) != 0)
255: ffs_snapremove(ovp);
256:
1.55 fvdl 257: osize = oip->i_size;
1.50 chs 258: aflag = ioflag & IO_SYNC ? B_SYNC : 0;
1.29 fvdl 259:
1.38 chs 260: /*
261: * Lengthen the size of the file. We must ensure that the
262: * last byte of the file is allocated. Since the smallest
263: * value of osize is 0, length will be at least 1.
264: */
265:
266: if (osize < length) {
1.115 dholland 267: if (ffs_lblkno(fs, osize) < UFS_NDADDR &&
268: ffs_lblkno(fs, osize) != ffs_lblkno(fs, length) &&
269: ffs_blkroundup(fs, osize) != osize) {
1.69 mycroft 270: off_t eob;
271:
1.115 dholland 272: eob = ffs_blkroundup(fs, osize);
1.87 yamt 273: uvm_vnp_setwritesize(ovp, eob);
1.69 mycroft 274: error = ufs_balloc_range(ovp, osize, eob - osize,
1.77 yamt 275: cred, aflag);
1.108 bouyer 276: if (error) {
277: (void) ffs_truncate(ovp, osize,
278: ioflag & IO_SYNC, cred);
1.48 chs 279: return error;
1.108 bouyer 280: }
1.48 chs 281: if (ioflag & IO_SYNC) {
1.106 rmind 282: mutex_enter(ovp->v_interlock);
1.49 chs 283: VOP_PUTPAGES(ovp,
1.69 mycroft 284: trunc_page(osize & fs->fs_bmask),
1.99 hannken 285: round_page(eob), PGO_CLEANIT | PGO_SYNCIO |
286: PGO_JOURNALLOCKED);
1.48 chs 287: }
288: }
1.87 yamt 289: uvm_vnp_setwritesize(ovp, length);
1.77 yamt 290: error = ufs_balloc_range(ovp, length - 1, 1, cred, aflag);
1.45 chs 291: if (error) {
1.92 pooka 292: (void) ffs_truncate(ovp, osize, ioflag & IO_SYNC, cred);
1.68 mycroft 293: return (error);
1.45 chs 294: }
1.43 chs 295: uvm_vnp_setsize(ovp, length);
1.38 chs 296: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.55 fvdl 297: KASSERT(ovp->v_size == oip->i_size);
1.77 yamt 298: return (ffs_update(ovp, NULL, NULL, 0));
1.38 chs 299: }
300:
301: /*
302: * When truncating a regular file down to a non-block-aligned size,
303: * we must zero the part of last block which is past the new EOF.
304: * We must synchronously flush the zeroed pages to disk
305: * since the new pages will be invalidated as soon as we
306: * inform the VM system of the new, smaller size.
1.48 chs 307: * We must do this before acquiring the GLOCK, since fetching
1.38 chs 308: * the pages will acquire the GLOCK internally.
309: * So there is a window where another thread could see a whole
310: * zeroed page past EOF, but that's life.
311: */
312:
1.113 dholland 313: offset = ffs_blkoff(fs, length);
1.85 yamt 314: pgoffset = length & PAGE_MASK;
315: if (ovp->v_type == VREG && (pgoffset != 0 || offset != 0) &&
316: osize > length) {
1.70 mycroft 317: daddr_t lbn;
1.38 chs 318: voff_t eoz;
1.85 yamt 319: int size;
1.38 chs 320:
1.85 yamt 321: if (offset != 0) {
322: error = ufs_balloc_range(ovp, length - 1, 1, cred,
323: aflag);
324: if (error)
325: return error;
326: }
1.115 dholland 327: lbn = ffs_lblkno(fs, length);
1.113 dholland 328: size = ffs_blksize(fs, oip, lbn);
1.115 dholland 329: eoz = MIN(MAX(ffs_lblktosize(fs, lbn) + size, round_page(pgoffset)),
1.85 yamt 330: osize);
1.107 hannken 331: ubc_zerorange(&ovp->v_uobj, length, eoz - length,
332: UBC_UNMAP_FLAG(ovp));
1.70 mycroft 333: if (round_page(eoz) > round_page(length)) {
1.106 rmind 334: mutex_enter(ovp->v_interlock);
1.70 mycroft 335: error = VOP_PUTPAGES(ovp, round_page(length),
336: round_page(eoz),
1.99 hannken 337: PGO_CLEANIT | PGO_DEACTIVATE | PGO_JOURNALLOCKED |
1.71 mycroft 338: ((ioflag & IO_SYNC) ? PGO_SYNCIO : 0));
1.70 mycroft 339: if (error)
340: return error;
341: }
1.38 chs 342: }
343:
1.84 yamt 344: genfs_node_wrlock(ovp);
1.55 fvdl 345: oip->i_size = length;
1.57 kristerw 346: DIP_ASSIGN(oip, size, length);
1.18 fvdl 347: uvm_vnp_setsize(ovp, length);
1.1 mycroft 348: /*
349: * Calculate index into inode's block list of
350: * last direct and indirect blocks (if any)
351: * which we want to keep. Lastblock is -1 when
352: * the file is truncated to 0.
353: */
1.115 dholland 354: lastblock = ffs_lblkno(fs, length + fs->fs_bsize - 1) - 1;
1.112 dholland 355: lastiblock[SINGLE] = lastblock - UFS_NDADDR;
1.113 dholland 356: lastiblock[DOUBLE] = lastiblock[SINGLE] - FFS_NINDIR(fs);
357: lastiblock[TRIPLE] = lastiblock[DOUBLE] - FFS_NINDIR(fs) * FFS_NINDIR(fs);
1.1 mycroft 358: nblocks = btodb(fs->fs_bsize);
359: /*
360: * Update file and block pointers on disk before we start freeing
361: * blocks. If we crash before free'ing blocks below, the blocks
362: * will be returned to the free list. lastiblock values are also
363: * normalized to -1 for calls to ffs_indirtrunc below.
364: */
1.67 mycroft 365: sync = 0;
1.55 fvdl 366: for (level = TRIPLE; level >= SINGLE; level--) {
1.112 dholland 367: blks[UFS_NDADDR + level] = DIP(oip, ib[level]);
368: if (lastiblock[level] < 0 && blks[UFS_NDADDR + level] != 0) {
1.67 mycroft 369: sync = 1;
1.57 kristerw 370: DIP_ASSIGN(oip, ib[level], 0);
1.1 mycroft 371: lastiblock[level] = -1;
372: }
1.55 fvdl 373: }
1.112 dholland 374: for (i = 0; i < UFS_NDADDR; i++) {
1.64 hannken 375: blks[i] = DIP(oip, db[i]);
1.67 mycroft 376: if (i > lastblock && blks[i] != 0) {
377: sync = 1;
1.57 kristerw 378: DIP_ASSIGN(oip, db[i], 0);
1.67 mycroft 379: }
380: }
1.68 mycroft 381: oip->i_flag |= IN_CHANGE | IN_UPDATE;
1.67 mycroft 382: if (sync) {
1.77 yamt 383: error = ffs_update(ovp, NULL, NULL, UPDATE_WAIT);
1.67 mycroft 384: if (error && !allerror)
385: allerror = error;
1.55 fvdl 386: }
1.32 mycroft 387:
1.1 mycroft 388: /*
389: * Having written the new inode to disk, save its new configuration
390: * and put back the old block pointers long enough to process them.
391: * Note that we save the new block configuration so we can check it
392: * when we are done.
393: */
1.112 dholland 394: for (i = 0; i < UFS_NDADDR; i++) {
1.64 hannken 395: bn = DIP(oip, db[i]);
396: DIP_ASSIGN(oip, db[i], blks[i]);
397: blks[i] = bn;
1.55 fvdl 398: }
1.112 dholland 399: for (i = 0; i < UFS_NIADDR; i++) {
1.64 hannken 400: bn = DIP(oip, ib[i]);
1.112 dholland 401: DIP_ASSIGN(oip, ib[i], blks[UFS_NDADDR + i]);
402: blks[UFS_NDADDR + i] = bn;
1.55 fvdl 403: }
404:
405: oip->i_size = osize;
1.57 kristerw 406: DIP_ASSIGN(oip, size, osize);
1.32 mycroft 407: error = vtruncbuf(ovp, lastblock + 1, 0, 0);
408: if (error && !allerror)
409: allerror = error;
1.1 mycroft 410:
411: /*
412: * Indirect blocks first.
413: */
1.112 dholland 414: indir_lbn[SINGLE] = -UFS_NDADDR;
1.113 dholland 415: indir_lbn[DOUBLE] = indir_lbn[SINGLE] - FFS_NINDIR(fs) - 1;
416: indir_lbn[TRIPLE] = indir_lbn[DOUBLE] - FFS_NINDIR(fs) * FFS_NINDIR(fs) - 1;
1.1 mycroft 417: for (level = TRIPLE; level >= SINGLE; level--) {
1.55 fvdl 418: if (oip->i_ump->um_fstype == UFS1)
419: bn = ufs_rw32(oip->i_ffs1_ib[level],UFS_FSNEEDSWAP(fs));
420: else
421: bn = ufs_rw64(oip->i_ffs2_ib[level],UFS_FSNEEDSWAP(fs));
1.1 mycroft 422: if (bn != 0) {
1.122 jdolecek 423: if (lastiblock[level] < 0 &&
424: oip->i_ump->um_mountp->mnt_wapbl) {
425: error = UFS_WAPBL_REGISTER_DEALLOCATION(
426: oip->i_ump->um_mountp,
427: FFS_FSBTODB(fs, bn), fs->fs_bsize,
428: &dcookie);
429: if (error)
430: goto out;
431: } else {
432: dcookie = NULL;
433: }
434:
1.1 mycroft 435: error = ffs_indirtrunc(oip, indir_lbn[level],
1.118 jdolecek 436: FFS_FSBTODB(fs, bn), lastiblock[level], level,
437: &blocksreleased);
1.122 jdolecek 438: if (error) {
439: if (dcookie) {
440: UFS_WAPBL_UNREGISTER_DEALLOCATION(
441: oip->i_ump->um_mountp, dcookie);
442: }
1.118 jdolecek 443: goto out;
1.122 jdolecek 444: }
1.118 jdolecek 445:
1.1 mycroft 446: if (lastiblock[level] < 0) {
1.122 jdolecek 447: if (!dcookie)
1.98 simonb 448: ffs_blkfree(fs, oip->i_devvp, bn,
449: fs->fs_bsize, oip->i_number);
1.118 jdolecek 450: DIP_ASSIGN(oip, ib[level], 0);
1.1 mycroft 451: blocksreleased += nblocks;
452: }
453: }
454: if (lastiblock[level] >= 0)
455: goto done;
456: }
457:
458: /*
459: * All whole direct blocks or frags.
460: */
1.112 dholland 461: for (i = UFS_NDADDR - 1; i > lastblock; i--) {
1.30 augustss 462: long bsize;
1.1 mycroft 463:
1.55 fvdl 464: if (oip->i_ump->um_fstype == UFS1)
465: bn = ufs_rw32(oip->i_ffs1_db[i], UFS_FSNEEDSWAP(fs));
466: else
467: bn = ufs_rw64(oip->i_ffs2_db[i], UFS_FSNEEDSWAP(fs));
1.1 mycroft 468: if (bn == 0)
469: continue;
1.118 jdolecek 470:
1.113 dholland 471: bsize = ffs_blksize(fs, oip, i);
1.98 simonb 472: if ((oip->i_ump->um_mountp->mnt_wapbl) &&
473: (ovp->v_type != VREG)) {
1.118 jdolecek 474: error = UFS_WAPBL_REGISTER_DEALLOCATION(
475: oip->i_ump->um_mountp,
1.122 jdolecek 476: FFS_FSBTODB(fs, bn), bsize, NULL);
1.118 jdolecek 477: if (error)
478: goto out;
1.98 simonb 479: } else
480: ffs_blkfree(fs, oip->i_devvp, bn, bsize, oip->i_number);
1.118 jdolecek 481: DIP_ASSIGN(oip, db[i], 0);
1.1 mycroft 482: blocksreleased += btodb(bsize);
483: }
484: if (lastblock < 0)
485: goto done;
486:
487: /*
488: * Finally, look for a change in size of the
489: * last direct block; release any frags.
490: */
1.55 fvdl 491: if (oip->i_ump->um_fstype == UFS1)
492: bn = ufs_rw32(oip->i_ffs1_db[lastblock], UFS_FSNEEDSWAP(fs));
493: else
494: bn = ufs_rw64(oip->i_ffs2_db[lastblock], UFS_FSNEEDSWAP(fs));
1.1 mycroft 495: if (bn != 0) {
496: long oldspace, newspace;
497:
498: /*
499: * Calculate amount of space we're giving
500: * back as old block size minus new block size.
501: */
1.113 dholland 502: oldspace = ffs_blksize(fs, oip, lastblock);
1.55 fvdl 503: oip->i_size = length;
1.57 kristerw 504: DIP_ASSIGN(oip, size, length);
1.113 dholland 505: newspace = ffs_blksize(fs, oip, lastblock);
1.1 mycroft 506: if (newspace == 0)
507: panic("itrunc: newspace");
508: if (oldspace - newspace > 0) {
509: /*
510: * Block number of space to be free'd is
511: * the old block # plus the number of frags
512: * required for the storage we're keeping.
513: */
1.115 dholland 514: bn += ffs_numfrags(fs, newspace);
1.98 simonb 515: if ((oip->i_ump->um_mountp->mnt_wapbl) &&
516: (ovp->v_type != VREG)) {
1.118 jdolecek 517: error = UFS_WAPBL_REGISTER_DEALLOCATION(
1.114 dholland 518: oip->i_ump->um_mountp, FFS_FSBTODB(fs, bn),
1.122 jdolecek 519: oldspace - newspace, NULL);
1.118 jdolecek 520: if (error)
521: goto out;
1.98 simonb 522: } else
523: ffs_blkfree(fs, oip->i_devvp, bn,
524: oldspace - newspace, oip->i_number);
1.1 mycroft 525: blocksreleased += btodb(oldspace - newspace);
526: }
527: }
1.32 mycroft 528:
1.1 mycroft 529: done:
530: for (level = SINGLE; level <= TRIPLE; level++)
1.124 ! riastrad 531: KASSERTMSG((blks[UFS_NDADDR + level] == DIP(oip, ib[level])),
! 532: "itrunc1 blk mismatch: %jx != %jx",
! 533: (uintmax_t)blks[UFS_NDADDR + level],
! 534: (uintmax_t)DIP(oip, ib[level]));
1.112 dholland 535: for (i = 0; i < UFS_NDADDR; i++)
1.124 ! riastrad 536: KASSERTMSG((blks[i] == DIP(oip, db[i])),
! 537: "itrunc2 blk mismatch: %jx != %jx",
! 538: (uintmax_t)blks[i], (uintmax_t)DIP(oip, db[i]));
! 539: KASSERTMSG((length != 0 || LIST_EMPTY(&ovp->v_cleanblkhd)),
! 540: "itrunc3: zero length and nonempty cleanblkhd");
! 541: KASSERTMSG((length != 0 || LIST_EMPTY(&ovp->v_dirtyblkhd)),
! 542: "itrunc3: zero length and nonempty dirtyblkhd");
1.118 jdolecek 543:
544: out:
545: /*
546: * Set length back to old size if deallocation failed. Some indirect
547: * blocks were deallocated creating a hole, but that is okay.
548: */
549: if (error == EAGAIN) {
1.121 jdolecek 550: if (!allerror)
551: allerror = error;
1.118 jdolecek 552: length = osize;
553: uvm_vnp_setsize(ovp, length);
554: }
555:
1.1 mycroft 556: /*
557: * Put back the real size.
558: */
1.55 fvdl 559: oip->i_size = length;
1.57 kristerw 560: DIP_ASSIGN(oip, size, length);
561: DIP_ADD(oip, blocks, -blocksreleased);
1.84 yamt 562: genfs_node_unlock(ovp);
1.1 mycroft 563: oip->i_flag |= IN_CHANGE;
1.98 simonb 564: UFS_WAPBL_UPDATE(ovp, NULL, NULL, 0);
1.105 bouyer 565: #if defined(QUOTA) || defined(QUOTA2)
1.1 mycroft 566: (void) chkdq(oip, -blocksreleased, NOCRED, 0);
567: #endif
1.55 fvdl 568: KASSERT(ovp->v_type != VREG || ovp->v_size == oip->i_size);
1.1 mycroft 569: return (allerror);
570: }
571:
572: /*
573: * Release blocks associated with the inode ip and stored in the indirect
574: * block bn. Blocks are free'd in LIFO order up to (but not including)
575: * lastbn. If level is greater than SINGLE, the block is an indirect block
576: * and recursive calls to indirtrunc must be used to cleanse other indirect
577: * blocks.
578: *
579: * NB: triple indirect blocks are untested.
580: */
581: static int
1.72 thorpej 582: ffs_indirtrunc(struct inode *ip, daddr_t lbn, daddr_t dbn, daddr_t lastbn,
583: int level, int64_t *countp)
1.1 mycroft 584: {
1.30 augustss 585: int i;
1.1 mycroft 586: struct buf *bp;
1.30 augustss 587: struct fs *fs = ip->i_fs;
1.55 fvdl 588: int32_t *bap1 = NULL;
589: int64_t *bap2 = NULL;
1.1 mycroft 590: struct vnode *vp;
1.53 fvdl 591: daddr_t nb, nlbn, last;
1.121 jdolecek 592: char *copy = NULL;
1.118 jdolecek 593: int64_t factor;
594: int64_t nblocks;
1.121 jdolecek 595: int error = 0, allerror = 0;
1.55 fvdl 596: const int needswap = UFS_FSNEEDSWAP(fs);
1.121 jdolecek 597: const int wapbl = (ip->i_ump->um_mountp->mnt_wapbl != NULL);
1.122 jdolecek 598: void *dcookie;
1.118 jdolecek 599:
1.55 fvdl 600: #define RBAP(ip, i) (((ip)->i_ump->um_fstype == UFS1) ? \
601: ufs_rw32(bap1[i], needswap) : ufs_rw64(bap2[i], needswap))
1.57 kristerw 602: #define BAP_ASSIGN(ip, i, value) \
603: do { \
604: if ((ip)->i_ump->um_fstype == UFS1) \
605: bap1[i] = (value); \
606: else \
607: bap2[i] = (value); \
608: } while(0)
1.1 mycroft 609:
610: /*
611: * Calculate index in current block of last
612: * block to be kept. -1 indicates the entire
613: * block so we need not calculate the index.
614: */
615: factor = 1;
616: for (i = SINGLE; i < level; i++)
1.113 dholland 617: factor *= FFS_NINDIR(fs);
1.1 mycroft 618: last = lastbn;
619: if (lastbn > 0)
620: last /= factor;
621: nblocks = btodb(fs->fs_bsize);
622: /*
623: * Get buffer of block pointers, zero those entries corresponding
1.121 jdolecek 624: * to blocks to be free'd, and update on disk copy first. Since
1.1 mycroft 625: * double(triple) indirect before single(double) indirect, calls
626: * to bmap on these blocks will fail. However, we already have
627: * the on disk address, so we have to set the b_blkno field
628: * explicitly instead of letting bread do everything for us.
629: */
630: vp = ITOV(ip);
1.97 hannken 631: error = ffs_getblk(vp, lbn, FFS_NOBLK, fs->fs_bsize, false, &bp);
1.118 jdolecek 632: if (error)
1.97 hannken 633: return error;
1.118 jdolecek 634:
1.93 ad 635: if (bp->b_oflags & (BO_DONE | BO_DELWRI)) {
1.1 mycroft 636: /* Braces must be here in case trace evaluates to nothing. */
637: trace(TR_BREADHIT, pack(vp, fs->fs_bsize), lbn);
638: } else {
639: trace(TR_BREADMISS, pack(vp, fs->fs_bsize), lbn);
1.95 ad 640: curlwp->l_ru.ru_inblock++; /* pay for read */
1.1 mycroft 641: bp->b_flags |= B_READ;
1.97 hannken 642: bp->b_flags &= ~B_COWDONE; /* we change blkno below */
1.1 mycroft 643: if (bp->b_bcount > bp->b_bufsize)
644: panic("ffs_indirtrunc: bad buffer size");
645: bp->b_blkno = dbn;
1.61 yamt 646: BIO_SETPRIO(bp, BPRIO_TIMECRITICAL);
1.62 hannken 647: VOP_STRATEGY(vp, bp);
1.1 mycroft 648: error = biowait(bp);
1.97 hannken 649: if (error == 0)
650: error = fscow_run(bp, true);
1.1 mycroft 651: }
652: if (error) {
1.89 ad 653: brelse(bp, 0);
1.118 jdolecek 654: return error;
1.1 mycroft 655: }
656:
1.121 jdolecek 657: /*
658: * Clear reference to blocks to be removed on disk, before actually
659: * reclaiming them, so that fsck is more likely to be able to recover
660: * the filesystem if system goes down during the truncate process.
661: * This assumes the truncate process would not fail, contrary
662: * to the wapbl case.
663: */
1.123 hannken 664: if (ip->i_ump->um_fstype == UFS1)
665: bap1 = (int32_t *)bp->b_data;
666: else
667: bap2 = (int64_t *)bp->b_data;
1.121 jdolecek 668: if (lastbn >= 0 && !wapbl) {
669: copy = kmem_alloc(fs->fs_bsize, KM_SLEEP);
670: memcpy((void *)copy, bp->b_data, (u_int)fs->fs_bsize);
671: for (i = last + 1; i < FFS_NINDIR(fs); i++)
672: BAP_ASSIGN(ip, i, 0);
673: error = bwrite(bp);
674: if (error)
675: allerror = error;
676:
677: if (ip->i_ump->um_fstype == UFS1)
678: bap1 = (int32_t *)copy;
679: else
680: bap2 = (int64_t *)copy;
681: }
1.1 mycroft 682:
683: /*
1.121 jdolecek 684: * Recursively free totally unused blocks.
1.1 mycroft 685: */
1.113 dholland 686: for (i = FFS_NINDIR(fs) - 1, nlbn = lbn + 1 - i * factor; i > last;
1.1 mycroft 687: i--, nlbn += factor) {
1.55 fvdl 688: nb = RBAP(ip, i);
1.1 mycroft 689: if (nb == 0)
690: continue;
1.118 jdolecek 691:
1.122 jdolecek 692: if ((ip->i_ump->um_mountp->mnt_wapbl) &&
693: ((level > SINGLE) || (ITOV(ip)->v_type != VREG))) {
694: error = UFS_WAPBL_REGISTER_DEALLOCATION(
695: ip->i_ump->um_mountp,
696: FFS_FSBTODB(fs, nb), fs->fs_bsize,
697: &dcookie);
698: if (error)
699: goto out;
700: } else {
701: dcookie = NULL;
702: }
703:
1.1 mycroft 704: if (level > SINGLE) {
1.114 dholland 705: error = ffs_indirtrunc(ip, nlbn, FFS_FSBTODB(fs, nb),
1.118 jdolecek 706: (daddr_t)-1, level - 1, countp);
1.122 jdolecek 707: if (error) {
708: if (dcookie) {
709: UFS_WAPBL_UNREGISTER_DEALLOCATION(
710: ip->i_ump->um_mountp, dcookie);
711: }
712:
1.118 jdolecek 713: goto out;
1.122 jdolecek 714: }
1.1 mycroft 715: }
1.118 jdolecek 716:
1.122 jdolecek 717: if (!dcookie)
1.98 simonb 718: ffs_blkfree(fs, ip->i_devvp, nb, fs->fs_bsize,
719: ip->i_number);
1.118 jdolecek 720:
721: BAP_ASSIGN(ip, i, 0);
722: *countp += nblocks;
1.1 mycroft 723: }
724:
725: /*
1.118 jdolecek 726: * Recursively free blocks on the now last partial indirect block.
1.1 mycroft 727: */
728: if (level > SINGLE && lastbn >= 0) {
1.119 jdolecek 729: last = lastbn % factor;
730: nb = RBAP(ip, i);
1.1 mycroft 731: if (nb != 0) {
1.114 dholland 732: error = ffs_indirtrunc(ip, nlbn, FFS_FSBTODB(fs, nb),
1.119 jdolecek 733: last, level - 1, countp);
1.9 christos 734: if (error)
1.118 jdolecek 735: goto out;
1.1 mycroft 736: }
737: }
1.12 thorpej 738:
1.118 jdolecek 739: out:
1.121 jdolecek 740: if (error && !allerror)
741: allerror = error;
742:
743: if (copy != NULL) {
744: kmem_free(copy, fs->fs_bsize);
745: } else if (lastbn < 0 && error == 0) {
1.118 jdolecek 746: /* all freed, release without writing back */
747: brelse(bp, BC_INVAL);
1.121 jdolecek 748: } else if (wapbl) {
749: /* only partially freed, write the updated block */
750: error = bwrite(bp);
751: if (!allerror)
752: allerror = error;
1.12 thorpej 753: }
754:
1.121 jdolecek 755: return (allerror);
1.1 mycroft 756: }
1.74 drochner 757:
758: void
759: ffs_itimes(struct inode *ip, const struct timespec *acc,
760: const struct timespec *mod, const struct timespec *cre)
761: {
1.82 kardel 762: struct timespec now;
1.75 christos 763:
1.76 yamt 764: if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) {
765: return;
766: }
1.75 christos 767:
1.83 yamt 768: vfs_timestamp(&now);
1.74 drochner 769: if (ip->i_flag & IN_ACCESS) {
770: if (acc == NULL)
1.82 kardel 771: acc = &now;
1.74 drochner 772: DIP_ASSIGN(ip, atime, acc->tv_sec);
773: DIP_ASSIGN(ip, atimensec, acc->tv_nsec);
774: }
775: if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
776: if ((ip->i_flags & SF_SNAPSHOT) == 0) {
777: if (mod == NULL)
1.82 kardel 778: mod = &now;
1.74 drochner 779: DIP_ASSIGN(ip, mtime, mod->tv_sec);
780: DIP_ASSIGN(ip, mtimensec, mod->tv_nsec);
781: }
782: ip->i_modrev++;
783: }
784: if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
785: if (cre == NULL)
1.82 kardel 786: cre = &now;
1.74 drochner 787: DIP_ASSIGN(ip, ctime, cre->tv_sec);
788: DIP_ASSIGN(ip, ctimensec, cre->tv_nsec);
789: }
790: if (ip->i_flag & (IN_ACCESS | IN_MODIFY))
791: ip->i_flag |= IN_ACCESSED;
792: if (ip->i_flag & (IN_UPDATE | IN_CHANGE))
793: ip->i_flag |= IN_MODIFIED;
794: ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
795: }
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