dir.c revision 1.37
1 /* $NetBSD: dir.c,v 1.37 2015/09/01 06:08:37 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 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. 15 * 3. Neither the name of the University nor the names of its contributors 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 */ 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/time.h> 35 #include <sys/buf.h> 36 #include <sys/mount.h> 37 38 #include <ufs/lfs/lfs.h> 39 #include <ufs/lfs/lfs_accessors.h> 40 #include <ufs/lfs/lfs_inode.h> 41 42 #include <err.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #include "bufcache.h" 48 #include "vnode.h" 49 #include "lfs_user.h" 50 51 #include "fsck.h" 52 #include "fsutil.h" 53 #include "extern.h" 54 55 const char *lfname = "lost+found"; 56 int lfmode = 01700; 57 struct lfs_dirtemplate emptydir = { 58 .dot_ino = 0, 59 .dot_reclen = LFS_DIRBLKSIZ, 60 }; 61 struct lfs_dirtemplate dirhead = { 62 .dot_ino = 0, 63 .dot_reclen = 12, 64 .dot_type = LFS_DT_DIR, 65 .dot_namlen = 1, 66 .dot_name = ".", 67 .dotdot_ino = 0, 68 .dotdot_reclen = LFS_DIRBLKSIZ - 12, 69 .dotdot_type = LFS_DT_DIR, 70 .dotdot_namlen = 2, 71 .dotdot_name = ".." 72 }; 73 struct lfs_odirtemplate odirhead = { 74 .dot_ino = 0, 75 .dot_reclen = 12, 76 .dot_namlen = 1, 77 .dot_name = ".", 78 .dotdot_ino = 0, 79 .dotdot_reclen = LFS_DIRBLKSIZ - 12, 80 .dotdot_namlen = 2, 81 .dotdot_name = ".." 82 }; 83 84 static int expanddir(struct uvnode *, union lfs_dinode *, char *); 85 static void freedir(ino_t, ino_t); 86 static struct lfs_direct *fsck_readdir(struct uvnode *, struct inodesc *); 87 static int lftempname(char *, ino_t); 88 static int mkentry(struct inodesc *); 89 static int chgino(struct inodesc *); 90 91 /* 92 * Propagate connected state through the tree. 93 */ 94 void 95 propagate(void) 96 { 97 struct inoinfo **inpp, *inp, *pinp; 98 struct inoinfo **inpend; 99 100 /* 101 * Create a list of children for each directory. 102 */ 103 inpend = &inpsort[inplast]; 104 for (inpp = inpsort; inpp < inpend; inpp++) { 105 inp = *inpp; 106 if (inp->i_parent == 0 || 107 inp->i_number == ULFS_ROOTINO) 108 continue; 109 pinp = getinoinfo(inp->i_parent); 110 inp->i_parentp = pinp; 111 inp->i_sibling = pinp->i_child; 112 pinp->i_child = inp; 113 } 114 inp = getinoinfo(ULFS_ROOTINO); 115 while (inp) { 116 statemap[inp->i_number] = DFOUND; 117 if (inp->i_child && 118 statemap[inp->i_child->i_number] == DSTATE) 119 inp = inp->i_child; 120 else if (inp->i_sibling) 121 inp = inp->i_sibling; 122 else 123 inp = inp->i_parentp; 124 } 125 } 126 127 /* 128 * Scan each entry in a directory block. 129 */ 130 int 131 dirscan(struct inodesc *idesc) 132 { 133 struct lfs_direct *dp; 134 struct ubuf *bp; 135 int dsize, n; 136 long blksiz; 137 char dbuf[LFS_DIRBLKSIZ]; 138 struct uvnode *vp; 139 140 if (idesc->id_type != DATA) 141 errexit("wrong type to dirscan %d", idesc->id_type); 142 if (idesc->id_entryno == 0 && 143 (idesc->id_filesize & (LFS_DIRBLKSIZ - 1)) != 0) 144 idesc->id_filesize = roundup(idesc->id_filesize, LFS_DIRBLKSIZ); 145 blksiz = idesc->id_numfrags * lfs_sb_getfsize(fs); 146 if (chkrange(idesc->id_blkno, idesc->id_numfrags)) { 147 idesc->id_filesize -= blksiz; 148 return (SKIP); 149 } 150 idesc->id_loc = 0; 151 152 vp = vget(fs, idesc->id_number); 153 for (dp = fsck_readdir(vp, idesc); dp != NULL; 154 dp = fsck_readdir(vp, idesc)) { 155 dsize = dp->d_reclen; 156 memcpy(dbuf, dp, (size_t) dsize); 157 idesc->id_dirp = (struct lfs_direct *) dbuf; 158 if ((n = (*idesc->id_func) (idesc)) & ALTERED) { 159 bread(vp, idesc->id_lblkno, blksiz, 0, &bp); 160 memcpy(bp->b_data + idesc->id_loc - dsize, dbuf, 161 (size_t) dsize); 162 VOP_BWRITE(bp); 163 sbdirty(); 164 } 165 if (n & STOP) 166 return (n); 167 } 168 return (idesc->id_filesize > 0 ? KEEPON : STOP); 169 } 170 171 /* 172 * get next entry in a directory. 173 */ 174 static struct lfs_direct * 175 fsck_readdir(struct uvnode *vp, struct inodesc *idesc) 176 { 177 struct lfs_direct *dp, *ndp; 178 struct ubuf *bp; 179 long size, blksiz, fix, dploc; 180 181 blksiz = idesc->id_numfrags * lfs_sb_getfsize(fs); 182 bread(vp, idesc->id_lblkno, blksiz, 0, &bp); 183 if (idesc->id_loc % LFS_DIRBLKSIZ == 0 && idesc->id_filesize > 0 && 184 idesc->id_loc < blksiz) { 185 dp = (struct lfs_direct *) (bp->b_data + idesc->id_loc); 186 if (dircheck(idesc, dp)) 187 goto dpok; 188 brelse(bp, 0); 189 if (idesc->id_fix == IGNORE) 190 return (0); 191 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 192 bread(vp, idesc->id_lblkno, blksiz, 0, &bp); 193 dp = (struct lfs_direct *) (bp->b_data + idesc->id_loc); 194 dp->d_reclen = LFS_DIRBLKSIZ; 195 dp->d_ino = 0; 196 dp->d_type = 0; 197 dp->d_namlen = 0; 198 dp->d_name[0] = '\0'; 199 if (fix) 200 VOP_BWRITE(bp); 201 else 202 brelse(bp, 0); 203 idesc->id_loc += LFS_DIRBLKSIZ; 204 idesc->id_filesize -= LFS_DIRBLKSIZ; 205 return (dp); 206 } 207 dpok: 208 if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz) { 209 brelse(bp, 0); 210 return NULL; 211 } 212 dploc = idesc->id_loc; 213 dp = (struct lfs_direct *) (bp->b_data + dploc); 214 idesc->id_loc += dp->d_reclen; 215 idesc->id_filesize -= dp->d_reclen; 216 if ((idesc->id_loc % LFS_DIRBLKSIZ) == 0) { 217 brelse(bp, 0); 218 return dp; 219 } 220 ndp = (struct lfs_direct *) (bp->b_data + idesc->id_loc); 221 if (idesc->id_loc < blksiz && idesc->id_filesize > 0 && 222 dircheck(idesc, ndp) == 0) { 223 brelse(bp, 0); 224 size = LFS_DIRBLKSIZ - (idesc->id_loc % LFS_DIRBLKSIZ); 225 idesc->id_loc += size; 226 idesc->id_filesize -= size; 227 if (idesc->id_fix == IGNORE) 228 return 0; 229 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 230 bread(vp, idesc->id_lblkno, blksiz, 0, &bp); 231 dp = (struct lfs_direct *) (bp->b_data + dploc); 232 dp->d_reclen += size; 233 if (fix) 234 VOP_BWRITE(bp); 235 else 236 brelse(bp, 0); 237 } else 238 brelse(bp, 0); 239 240 return (dp); 241 } 242 243 /* 244 * Verify that a directory entry is valid. 245 * This is a superset of the checks made in the kernel. 246 */ 247 int 248 dircheck(struct inodesc *idesc, struct lfs_direct *dp) 249 { 250 int size; 251 char *cp; 252 u_char namlen, type; 253 int spaceleft; 254 255 spaceleft = LFS_DIRBLKSIZ - (idesc->id_loc % LFS_DIRBLKSIZ); 256 if (dp->d_ino >= maxino || 257 dp->d_reclen == 0 || 258 dp->d_reclen > spaceleft || 259 (dp->d_reclen & 0x3) != 0) { 260 pwarn("ino too large, reclen=0, reclen>space, or reclen&3!=0\n"); 261 pwarn("dp->d_ino = 0x%x\tdp->d_reclen = 0x%x\n", 262 dp->d_ino, dp->d_reclen); 263 pwarn("maxino = %llu\tspaceleft = 0x%x\n", 264 (unsigned long long)maxino, spaceleft); 265 return (0); 266 } 267 if (dp->d_ino == 0) 268 return (1); 269 size = LFS_DIRSIZ(0, dp, 0); 270 namlen = dp->d_namlen; 271 type = dp->d_type; 272 if (dp->d_reclen < size || 273 idesc->id_filesize < size || 274 /* namlen > MAXNAMLEN || */ 275 type > 15) { 276 printf("reclen<size, filesize<size, namlen too large, or type>15\n"); 277 return (0); 278 } 279 for (cp = dp->d_name, size = 0; size < namlen; size++) 280 if (*cp == '\0' || (*cp++ == '/')) { 281 printf("name contains NUL or /\n"); 282 return (0); 283 } 284 if (*cp != '\0') { 285 printf("name size misstated\n"); 286 return (0); 287 } 288 return (1); 289 } 290 291 void 292 direrror(ino_t ino, const char *errmesg) 293 { 294 295 fileerror(ino, ino, errmesg); 296 } 297 298 void 299 fileerror(ino_t cwd, ino_t ino, const char *errmesg) 300 { 301 char pathbuf[MAXPATHLEN + 1]; 302 struct uvnode *vp; 303 304 pwarn("%s ", errmesg); 305 pinode(ino); 306 printf("\n"); 307 pwarn("PARENT=%lld\n", (long long)cwd); 308 getpathname(pathbuf, sizeof(pathbuf), cwd, ino); 309 if (ino < ULFS_ROOTINO || ino >= maxino) { 310 pfatal("NAME=%s\n", pathbuf); 311 return; 312 } 313 vp = vget(fs, ino); 314 if (vp == NULL) 315 pfatal("INO is NULL\n"); 316 else { 317 if (ftypeok(VTOD(vp))) 318 pfatal("%s=%s\n", 319 (lfs_dino_getmode(fs, VTOI(vp)->i_din) & LFS_IFMT) == LFS_IFDIR ? 320 "DIR" : "FILE", pathbuf); 321 else 322 pfatal("NAME=%s\n", pathbuf); 323 } 324 } 325 326 void 327 adjust(struct inodesc *idesc, short lcnt) 328 { 329 struct uvnode *vp; 330 union lfs_dinode *dp; 331 332 /* 333 * XXX: (1) since lcnt is apparently a delta, rename it; (2) 334 * why is it a value to *subtract*? that is unnecessarily 335 * confusing. 336 */ 337 338 vp = vget(fs, idesc->id_number); 339 dp = VTOD(vp); 340 if (lfs_dino_getnlink(fs, dp) == lcnt) { 341 if (linkup(idesc->id_number, (ino_t) 0) == 0) 342 clri(idesc, "UNREF", 0); 343 } else { 344 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname : 345 ((lfs_dino_getmode(fs, dp) & LFS_IFMT) == LFS_IFDIR ? "DIR" : "FILE")); 346 pinode(idesc->id_number); 347 printf(" COUNT %d SHOULD BE %d", 348 lfs_dino_getnlink(fs, dp), lfs_dino_getnlink(fs, dp) - lcnt); 349 if (preen) { 350 if (lcnt < 0) { 351 printf("\n"); 352 pfatal("LINK COUNT INCREASING"); 353 } 354 printf(" (ADJUSTED)\n"); 355 } 356 if (preen || reply("ADJUST") == 1) { 357 lfs_dino_setnlink(fs, dp, 358 lfs_dino_getnlink(fs, dp) - lcnt); 359 inodirty(VTOI(vp)); 360 } 361 } 362 } 363 364 static int 365 mkentry(struct inodesc *idesc) 366 { 367 struct lfs_direct *dirp = idesc->id_dirp; 368 struct lfs_direct newent; 369 int newlen, oldlen; 370 371 newent.d_namlen = strlen(idesc->id_name); 372 newlen = LFS_DIRSIZ(0, &newent, 0); 373 if (dirp->d_ino != 0) 374 oldlen = LFS_DIRSIZ(0, dirp, 0); 375 else 376 oldlen = 0; 377 if (dirp->d_reclen - oldlen < newlen) 378 return (KEEPON); 379 newent.d_reclen = dirp->d_reclen - oldlen; 380 dirp->d_reclen = oldlen; 381 dirp = (struct lfs_direct *) (((char *) dirp) + oldlen); 382 dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */ 383 dirp->d_reclen = newent.d_reclen; 384 dirp->d_type = typemap[idesc->id_parent]; 385 dirp->d_namlen = newent.d_namlen; 386 memcpy(dirp->d_name, idesc->id_name, (size_t) dirp->d_namlen + 1); 387 return (ALTERED | STOP); 388 } 389 390 static int 391 chgino(struct inodesc *idesc) 392 { 393 struct lfs_direct *dirp = idesc->id_dirp; 394 395 if (memcmp(dirp->d_name, idesc->id_name, (int) dirp->d_namlen + 1)) 396 return (KEEPON); 397 dirp->d_ino = idesc->id_parent; 398 dirp->d_type = typemap[idesc->id_parent]; 399 return (ALTERED | STOP); 400 } 401 402 int 403 linkup(ino_t orphan, ino_t parentdir) 404 { 405 union lfs_dinode *dp; 406 int lostdir; 407 ino_t oldlfdir; 408 struct inodesc idesc; 409 char tempname[BUFSIZ]; 410 struct uvnode *vp; 411 412 memset(&idesc, 0, sizeof(struct inodesc)); 413 vp = vget(fs, orphan); 414 dp = VTOD(vp); 415 lostdir = (lfs_dino_getmode(fs, dp) & LFS_IFMT) == LFS_IFDIR; 416 pwarn("UNREF %s ", lostdir ? "DIR" : "FILE"); 417 pinode(orphan); 418 if (preen && lfs_dino_getsize(fs, dp) == 0) 419 return (0); 420 if (preen) 421 printf(" (RECONNECTED)\n"); 422 else if (reply("RECONNECT") == 0) 423 return (0); 424 if (lfdir == 0) { 425 dp = ginode(ULFS_ROOTINO); 426 idesc.id_name = lfname; 427 idesc.id_type = DATA; 428 idesc.id_func = findino; 429 idesc.id_number = ULFS_ROOTINO; 430 if ((ckinode(dp, &idesc) & FOUND) != 0) { 431 lfdir = idesc.id_parent; 432 } else { 433 pwarn("NO lost+found DIRECTORY"); 434 if (preen || reply("CREATE")) { 435 lfdir = allocdir(ULFS_ROOTINO, (ino_t) 0, lfmode); 436 if (lfdir != 0) { 437 if (makeentry(ULFS_ROOTINO, lfdir, lfname) != 0) { 438 if (preen) 439 printf(" (CREATED)\n"); 440 } else { 441 freedir(lfdir, ULFS_ROOTINO); 442 lfdir = 0; 443 if (preen) 444 printf("\n"); 445 } 446 } 447 } 448 } 449 if (lfdir == 0) { 450 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY"); 451 printf("\n\n"); 452 return (0); 453 } 454 } 455 vp = vget(fs, lfdir); 456 dp = VTOD(vp); 457 if ((lfs_dino_getmode(fs, dp) & LFS_IFMT) != LFS_IFDIR) { 458 pfatal("lost+found IS NOT A DIRECTORY"); 459 if (reply("REALLOCATE") == 0) 460 return (0); 461 oldlfdir = lfdir; 462 if ((lfdir = allocdir(ULFS_ROOTINO, (ino_t) 0, lfmode)) == 0) { 463 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 464 return (0); 465 } 466 if ((changeino(ULFS_ROOTINO, lfname, lfdir) & ALTERED) == 0) { 467 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 468 return (0); 469 } 470 inodirty(VTOI(vp)); 471 idesc.id_type = ADDR; 472 idesc.id_func = pass4check; 473 idesc.id_number = oldlfdir; 474 adjust(&idesc, lncntp[oldlfdir] + 1); 475 lncntp[oldlfdir] = 0; 476 vp = vget(fs, lfdir); 477 dp = VTOD(vp); 478 } 479 if (statemap[lfdir] != DFOUND) { 480 pfatal("SORRY. NO lost+found DIRECTORY\n\n"); 481 return (0); 482 } 483 (void) lftempname(tempname, orphan); 484 if (makeentry(lfdir, orphan, tempname) == 0) { 485 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY"); 486 printf("\n\n"); 487 return (0); 488 } 489 lncntp[orphan]--; 490 if (lostdir) { 491 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 && 492 parentdir != (ino_t) - 1) 493 (void) makeentry(orphan, lfdir, ".."); 494 vp = vget(fs, lfdir); 495 lfs_dino_setnlink(fs, VTOI(vp)->i_din, 496 lfs_dino_getnlink(fs, VTOI(vp)->i_din) + 1); 497 inodirty(VTOI(vp)); 498 lncntp[lfdir]++; 499 pwarn("DIR I=%llu CONNECTED. ", (unsigned long long)orphan); 500 if (parentdir != (ino_t) - 1) 501 printf("PARENT WAS I=%llu\n", 502 (unsigned long long)parentdir); 503 if (preen == 0) 504 printf("\n"); 505 } 506 return (1); 507 } 508 509 /* 510 * fix an entry in a directory. 511 */ 512 int 513 changeino(ino_t dir, const char *name, ino_t newnum) 514 { 515 struct inodesc idesc; 516 517 memset(&idesc, 0, sizeof(struct inodesc)); 518 idesc.id_type = DATA; 519 idesc.id_func = chgino; 520 idesc.id_number = dir; 521 idesc.id_fix = DONTKNOW; 522 idesc.id_name = name; 523 idesc.id_parent = newnum; /* new value for name */ 524 525 return (ckinode(ginode(dir), &idesc)); 526 } 527 528 /* 529 * make an entry in a directory 530 */ 531 int 532 makeentry(ino_t parent, ino_t ino, const char *name) 533 { 534 union lfs_dinode *dp; 535 struct inodesc idesc; 536 char pathbuf[MAXPATHLEN + 1]; 537 struct uvnode *vp; 538 uint64_t size; 539 540 if (parent < ULFS_ROOTINO || parent >= maxino || 541 ino < ULFS_ROOTINO || ino >= maxino) 542 return (0); 543 memset(&idesc, 0, sizeof(struct inodesc)); 544 idesc.id_type = DATA; 545 idesc.id_func = mkentry; 546 idesc.id_number = parent; 547 idesc.id_parent = ino; /* this is the inode to enter */ 548 idesc.id_fix = DONTKNOW; 549 idesc.id_name = name; 550 vp = vget(fs, parent); 551 dp = VTOD(vp); 552 size = lfs_dino_getsize(fs, dp); 553 if (size % LFS_DIRBLKSIZ) { 554 size = roundup(size, LFS_DIRBLKSIZ); 555 lfs_dino_setsize(fs, dp, size); 556 inodirty(VTOI(vp)); 557 } 558 if ((ckinode(dp, &idesc) & ALTERED) != 0) 559 return (1); 560 getpathname(pathbuf, sizeof(pathbuf), parent, parent); 561 vp = vget(fs, parent); 562 dp = VTOD(vp); 563 if (expanddir(vp, dp, pathbuf) == 0) 564 return (0); 565 return (ckinode(dp, &idesc) & ALTERED); 566 } 567 568 /* 569 * Attempt to expand the size of a directory 570 */ 571 static int 572 expanddir(struct uvnode *vp, union lfs_dinode *dp, char *name) 573 { 574 daddr_t lastbn; 575 struct ubuf *bp; 576 char *cp, firstblk[LFS_DIRBLKSIZ]; 577 578 lastbn = lfs_lblkno(fs, lfs_dino_getsize(fs, dp)); 579 if (lastbn >= ULFS_NDADDR - 1 || lfs_dino_getdb(fs, dp, lastbn) == 0 || 580 lfs_dino_getsize(fs, dp) == 0) 581 return (0); 582 lfs_dino_setdb(fs, dp, lastbn + 1, lfs_dino_getdb(fs, dp, lastbn)); 583 lfs_dino_setdb(fs, dp, lastbn, 0); 584 bp = getblk(vp, lastbn, lfs_sb_getbsize(fs)); 585 VOP_BWRITE(bp); 586 lfs_dino_setsize(fs, dp, 587 lfs_dino_getsize(fs, dp) + lfs_sb_getbsize(fs)); 588 lfs_dino_setblocks(fs, dp, 589 lfs_dino_getblocks(fs, dp) + lfs_btofsb(fs, lfs_sb_getbsize(fs))); 590 bread(vp, lfs_dino_getdb(fs, dp, lastbn + 1), 591 (long) lfs_dblksize(fs, dp, lastbn + 1), 0, &bp); 592 if (bp->b_flags & B_ERROR) 593 goto bad; 594 memcpy(firstblk, bp->b_data, LFS_DIRBLKSIZ); 595 bread(vp, lastbn, lfs_sb_getbsize(fs), 0, &bp); 596 if (bp->b_flags & B_ERROR) 597 goto bad; 598 memcpy(bp->b_data, firstblk, LFS_DIRBLKSIZ); 599 for (cp = &bp->b_data[LFS_DIRBLKSIZ]; 600 cp < &bp->b_data[lfs_sb_getbsize(fs)]; 601 cp += LFS_DIRBLKSIZ) 602 memcpy(cp, &emptydir, sizeof emptydir); 603 VOP_BWRITE(bp); 604 bread(vp, lfs_dino_getdb(fs, dp, lastbn + 1), 605 (long) lfs_dblksize(fs, dp, lastbn + 1), 0, &bp); 606 if (bp->b_flags & B_ERROR) 607 goto bad; 608 memcpy(bp->b_data, &emptydir, sizeof emptydir); 609 pwarn("NO SPACE LEFT IN %s", name); 610 if (preen) 611 printf(" (EXPANDED)\n"); 612 else if (reply("EXPAND") == 0) 613 goto bad; 614 VOP_BWRITE(bp); 615 inodirty(VTOI(vp)); 616 return (1); 617 bad: 618 lfs_dino_setdb(fs, dp, lastbn, lfs_dino_getdb(fs, dp, lastbn + 1)); 619 lfs_dino_setdb(fs, dp, lastbn + 1, 0); 620 lfs_dino_setsize(fs, dp, 621 lfs_dino_getsize(fs, dp) - lfs_sb_getbsize(fs)); 622 lfs_dino_setblocks(fs, dp, 623 lfs_dino_getblocks(fs, dp) - lfs_btofsb(fs, lfs_sb_getbsize(fs))); 624 return (0); 625 } 626 627 /* 628 * allocate a new directory 629 */ 630 int 631 allocdir(ino_t parent, ino_t request, int mode) 632 { 633 ino_t ino; 634 char *cp; 635 union lfs_dinode *dp; 636 struct ubuf *bp; 637 struct lfs_dirtemplate *dirp; 638 struct uvnode *vp; 639 640 ino = allocino(request, LFS_IFDIR | mode); 641 dirp = &dirhead; 642 dirp->dot_ino = ino; 643 dirp->dotdot_ino = parent; 644 vp = vget(fs, ino); 645 dp = VTOD(vp); 646 bread(vp, lfs_dino_getdb(fs, dp, 0), lfs_sb_getfsize(fs), 0, &bp); 647 if (bp->b_flags & B_ERROR) { 648 brelse(bp, 0); 649 freeino(ino); 650 return (0); 651 } 652 memcpy(bp->b_data, dirp, sizeof(struct lfs_dirtemplate)); 653 for (cp = &bp->b_data[LFS_DIRBLKSIZ]; 654 cp < &bp->b_data[lfs_sb_getfsize(fs)]; 655 cp += LFS_DIRBLKSIZ) 656 memcpy(cp, &emptydir, sizeof emptydir); 657 VOP_BWRITE(bp); 658 lfs_dino_setnlink(fs, dp, 2); 659 inodirty(VTOI(vp)); 660 if (ino == ULFS_ROOTINO) { 661 lncntp[ino] = lfs_dino_getnlink(fs, dp); 662 cacheino(dp, ino); 663 return (ino); 664 } 665 if (statemap[parent] != DSTATE && statemap[parent] != DFOUND) { 666 freeino(ino); 667 return (0); 668 } 669 cacheino(dp, ino); 670 statemap[ino] = statemap[parent]; 671 if (statemap[ino] == DSTATE) { 672 lncntp[ino] = lfs_dino_getnlink(fs, dp); 673 lncntp[parent]++; 674 } 675 vp = vget(fs, parent); 676 dp = VTOD(vp); 677 lfs_dino_setnlink(fs, dp, lfs_dino_getnlink(fs, dp) + 1); 678 inodirty(VTOI(vp)); 679 return (ino); 680 } 681 682 /* 683 * free a directory inode 684 */ 685 static void 686 freedir(ino_t ino, ino_t parent) 687 { 688 struct uvnode *vp; 689 690 if (ino != parent) { 691 vp = vget(fs, parent); 692 lfs_dino_setnlink(fs, VTOI(vp)->i_din, 693 lfs_dino_getnlink(fs, VTOI(vp)->i_din) - 1); 694 inodirty(VTOI(vp)); 695 } 696 freeino(ino); 697 } 698 699 /* 700 * generate a temporary name for the lost+found directory. 701 */ 702 static int 703 lftempname(char *bufp, ino_t ino) 704 { 705 ino_t in; 706 char *cp; 707 int namlen; 708 709 cp = bufp + 2; 710 for (in = maxino; in > 0; in /= 10) 711 cp++; 712 *--cp = 0; 713 namlen = cp - bufp; 714 in = ino; 715 while (cp > bufp) { 716 *--cp = (in % 10) + '0'; 717 in /= 10; 718 } 719 *cp = '#'; 720 return (namlen); 721 } 722
Indexes created Fri Sep 26 20:09:58 GMT 2025