dir.c revision 92839
143313Sbrian/* 243313Sbrian * Copyright (c) 1980, 1986, 1993 343313Sbrian * The Regents of the University of California. All rights reserved. 443313Sbrian * 543313Sbrian * Redistribution and use in source and binary forms, with or without 643313Sbrian * modification, are permitted provided that the following conditions 743313Sbrian * are met: 843313Sbrian * 1. Redistributions of source code must retain the above copyright 943313Sbrian * notice, this list of conditions and the following disclaimer. 1043313Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1143313Sbrian * notice, this list of conditions and the following disclaimer in the 1243313Sbrian * documentation and/or other materials provided with the distribution. 1343313Sbrian * 3. All advertising materials mentioning features or use of this software 1443313Sbrian * must display the following acknowledgement: 1543313Sbrian * This product includes software developed by the University of 1643313Sbrian * California, Berkeley and its contributors. 1743313Sbrian * 4. Neither the name of the University nor the names of its contributors 1843313Sbrian * may be used to endorse or promote products derived from this software 1943313Sbrian * without specific prior written permission. 2043313Sbrian * 2143313Sbrian * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2243313Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2343313Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2443313Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2543313Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2650479Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2743313Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2843313Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2998132Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3098132Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3198132Sbrian * SUCH DAMAGE. 3298132Sbrian */ 3398132Sbrian 3498132Sbrian#ifndef lint 3543313Sbrian#if 0 3658028Sbrianstatic const char sccsid[] = "@(#)dir.c 8.8 (Berkeley) 4/28/95"; 3743693Sbrian#endif 3843693Sbrianstatic const char rcsid[] = 3943693Sbrian "$FreeBSD: head/sbin/fsck_ffs/dir.c 92839 2002-03-20 22:57:10Z imp $"; 4043693Sbrian#endif /* not lint */ 4143693Sbrian 4243693Sbrian#include <sys/param.h> 4343313Sbrian#include <sys/time.h> 4443313Sbrian#include <sys/sysctl.h> 4543313Sbrian 4643313Sbrian#include <ufs/ufs/dinode.h> 4743313Sbrian#include <ufs/ufs/dir.h> 4896153Sbrian#include <ufs/ffs/fs.h> 4996153Sbrian 5043313Sbrian#include <err.h> 5196730Sbrian#include <string.h> 5296324Sbrian 5396324Sbrian#include "fsck.h" 5443313Sbrian 5598132Sbrianchar *lfname = "lost+found"; 5698132Sbrianint lfmode = 01777; 5798132Sbrianstruct dirtemplate emptydir = { 5898132Sbrian 0, DIRBLKSIZ, DT_UNKNOWN, 0, "", 5998132Sbrian 0, 0, DT_UNKNOWN, 0, "" 6098132Sbrian}; 6198132Sbrianstruct dirtemplate dirhead = { 6298132Sbrian 0, 12, DT_DIR, 1, ".", 6374001Sbrian 0, DIRBLKSIZ - 12, DT_DIR, 2, ".." 6443313Sbrian}; 6543313Sbrianstruct odirtemplate odirhead = { 6643313Sbrian 0, 12, 1, ".", 6765178Sbrian 0, DIRBLKSIZ - 12, 2, ".." 6865178Sbrian}; 6965178Sbrian 7065178Sbrianstatic int chgino(struct inodesc *); 7165178Sbrianstatic int dircheck(struct inodesc *, struct direct *); 7265178Sbrianstatic int expanddir(struct dinode *dp, char *name); 7365178Sbrianstatic void freedir(ino_t ino, ino_t parent); 7465178Sbrianstatic struct direct *fsck_readdir(struct inodesc *); 7565178Sbrianstatic struct bufarea *getdirblk(ufs_daddr_t blkno, long size); 7665178Sbrianstatic int lftempname(char *bufp, ino_t ino); 7743693Sbrianstatic int mkentry(struct inodesc *); 7843693Sbrian 7943693Sbrian/* 8043313Sbrian * Propagate connected state through the tree. 8143313Sbrian */ 8243313Sbrianvoid 8343313Sbrianpropagate(void) 8443313Sbrian{ 8543313Sbrian struct inoinfo **inpp, *inp; 8696730Sbrian struct inoinfo **inpend; 8796730Sbrian long change; 8896730Sbrian 8965178Sbrian inpend = &inpsort[inplast]; 9065178Sbrian do { 9165178Sbrian change = 0; 9265178Sbrian for (inpp = inpsort; inpp < inpend; inpp++) { 9365178Sbrian inp = *inpp; 9465178Sbrian if (inp->i_parent == 0) 9565178Sbrian continue; 9665178Sbrian if (inoinfo(inp->i_parent)->ino_state == DFOUND && 9765178Sbrian inoinfo(inp->i_number)->ino_state == DSTATE) { 9893767Shosokawa inoinfo(inp->i_number)->ino_state = DFOUND; 9993767Shosokawa change++; 10093767Shosokawa } 101 } 102 } while (change > 0); 103} 104 105/* 106 * Scan each entry in a directory block. 107 */ 108int 109dirscan(struct inodesc *idesc) 110{ 111 struct direct *dp; 112 struct bufarea *bp; 113 u_int dsize, n; 114 long blksiz; 115 char dbuf[DIRBLKSIZ]; 116 117 if (idesc->id_type != DATA) 118 errx(EEXIT, "wrong type to dirscan %d", idesc->id_type); 119 if (idesc->id_entryno == 0 && 120 (idesc->id_filesize & (DIRBLKSIZ - 1)) != 0) 121 idesc->id_filesize = roundup(idesc->id_filesize, DIRBLKSIZ); 122 blksiz = idesc->id_numfrags * sblock.fs_fsize; 123 if (chkrange(idesc->id_blkno, idesc->id_numfrags)) { 124 idesc->id_filesize -= blksiz; 125 return (SKIP); 126 } 127 idesc->id_loc = 0; 128 for (dp = fsck_readdir(idesc); dp != NULL; dp = fsck_readdir(idesc)) { 129 dsize = dp->d_reclen; 130 if (dsize > sizeof(dbuf)) 131 dsize = sizeof(dbuf); 132 memmove(dbuf, dp, (size_t)dsize); 133# if (BYTE_ORDER == LITTLE_ENDIAN) 134 if (!newinofmt) { 135 struct direct *tdp = (struct direct *)dbuf; 136 u_char tmp; 137 138 tmp = tdp->d_namlen; 139 tdp->d_namlen = tdp->d_type; 140 tdp->d_type = tmp; 141 } 142# endif 143 idesc->id_dirp = (struct direct *)dbuf; 144 if ((n = (*idesc->id_func)(idesc)) & ALTERED) { 145# if (BYTE_ORDER == LITTLE_ENDIAN) 146 if (!newinofmt && !doinglevel2) { 147 struct direct *tdp; 148 u_char tmp; 149 150 tdp = (struct direct *)dbuf; 151 tmp = tdp->d_namlen; 152 tdp->d_namlen = tdp->d_type; 153 tdp->d_type = tmp; 154 } 155# endif 156 bp = getdirblk(idesc->id_blkno, blksiz); 157 memmove(bp->b_un.b_buf + idesc->id_loc - dsize, dbuf, 158 (size_t)dsize); 159 dirty(bp); 160 sbdirty(); 161 } 162 if (n & STOP) 163 return (n); 164 } 165 return (idesc->id_filesize > 0 ? KEEPON : STOP); 166} 167 168/* 169 * get next entry in a directory. 170 */ 171static struct direct * 172fsck_readdir(struct inodesc *idesc) 173{ 174 struct direct *dp, *ndp; 175 struct bufarea *bp; 176 long size, blksiz, fix, dploc; 177 178 blksiz = idesc->id_numfrags * sblock.fs_fsize; 179 bp = getdirblk(idesc->id_blkno, blksiz); 180 if (idesc->id_loc % DIRBLKSIZ == 0 && idesc->id_filesize > 0 && 181 idesc->id_loc < blksiz) { 182 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc); 183 if (dircheck(idesc, dp)) 184 goto dpok; 185 if (idesc->id_fix == IGNORE) 186 return (0); 187 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 188 bp = getdirblk(idesc->id_blkno, blksiz); 189 dp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc); 190 dp->d_reclen = DIRBLKSIZ; 191 dp->d_ino = 0; 192 dp->d_type = 0; 193 dp->d_namlen = 0; 194 dp->d_name[0] = '\0'; 195 if (fix) 196 dirty(bp); 197 idesc->id_loc += DIRBLKSIZ; 198 idesc->id_filesize -= DIRBLKSIZ; 199 return (dp); 200 } 201dpok: 202 if (idesc->id_filesize <= 0 || idesc->id_loc >= blksiz) 203 return NULL; 204 dploc = idesc->id_loc; 205 dp = (struct direct *)(bp->b_un.b_buf + dploc); 206 idesc->id_loc += dp->d_reclen; 207 idesc->id_filesize -= dp->d_reclen; 208 if ((idesc->id_loc % DIRBLKSIZ) == 0) 209 return (dp); 210 ndp = (struct direct *)(bp->b_un.b_buf + idesc->id_loc); 211 if (idesc->id_loc < blksiz && idesc->id_filesize > 0 && 212 dircheck(idesc, ndp) == 0) { 213 size = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ); 214 idesc->id_loc += size; 215 idesc->id_filesize -= size; 216 if (idesc->id_fix == IGNORE) 217 return (0); 218 fix = dofix(idesc, "DIRECTORY CORRUPTED"); 219 bp = getdirblk(idesc->id_blkno, blksiz); 220 dp = (struct direct *)(bp->b_un.b_buf + dploc); 221 dp->d_reclen += size; 222 if (fix) 223 dirty(bp); 224 } 225 return (dp); 226} 227 228/* 229 * Verify that a directory entry is valid. 230 * This is a superset of the checks made in the kernel. 231 */ 232static int 233dircheck(struct inodesc *idesc, struct direct *dp) 234{ 235 int size; 236 char *cp; 237 u_char namlen, type; 238 int spaceleft; 239 240 spaceleft = DIRBLKSIZ - (idesc->id_loc % DIRBLKSIZ); 241 if (dp->d_reclen == 0 || 242 dp->d_reclen > spaceleft || 243 (dp->d_reclen & 0x3) != 0) 244 goto bad; 245 if (dp->d_ino == 0) 246 return (1); 247 size = DIRSIZ(!newinofmt, dp); 248# if (BYTE_ORDER == LITTLE_ENDIAN) 249 if (!newinofmt) { 250 type = dp->d_namlen; 251 namlen = dp->d_type; 252 } else { 253 namlen = dp->d_namlen; 254 type = dp->d_type; 255 } 256# else 257 namlen = dp->d_namlen; 258 type = dp->d_type; 259# endif 260 if (dp->d_reclen < size || 261 idesc->id_filesize < size || 262 namlen > MAXNAMLEN || 263 type > 15) 264 goto bad; 265 for (cp = dp->d_name, size = 0; size < namlen; size++) 266 if (*cp == '\0' || (*cp++ == '/')) 267 goto bad; 268 if (*cp != '\0') 269 goto bad; 270 return (1); 271bad: 272 if (debug) 273 printf("Bad dir: ino %d reclen %d namlen %d type %d name %s\n", 274 dp->d_ino, dp->d_reclen, dp->d_namlen, dp->d_type, 275 dp->d_name); 276 return (0); 277} 278 279void 280direrror(ino_t ino, char *errmesg) 281{ 282 283 fileerror(ino, ino, errmesg); 284} 285 286void 287fileerror(ino_t cwd, ino_t ino, char *errmesg) 288{ 289 struct dinode *dp; 290 char pathbuf[MAXPATHLEN + 1]; 291 292 pwarn("%s ", errmesg); 293 pinode(ino); 294 printf("\n"); 295 getpathname(pathbuf, cwd, ino); 296 if (ino < ROOTINO || ino > maxino) { 297 pfatal("NAME=%s\n", pathbuf); 298 return; 299 } 300 dp = ginode(ino); 301 if (ftypeok(dp)) 302 pfatal("%s=%s\n", 303 (dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE", pathbuf); 304 else 305 pfatal("NAME=%s\n", pathbuf); 306} 307 308void 309adjust(struct inodesc *idesc, int lcnt) 310{ 311 struct dinode *dp; 312 int saveresolved; 313 314 dp = ginode(idesc->id_number); 315 if (dp->di_nlink == lcnt) { 316 /* 317 * If we have not hit any unresolved problems, are running 318 * in preen mode, and are on a filesystem using soft updates, 319 * then just toss any partially allocated files. 320 */ 321 if (resolved && (preen || bkgrdflag) && usedsoftdep) { 322 clri(idesc, "UNREF", 1); 323 return; 324 } else { 325 /* 326 * The filesystem can be marked clean even if 327 * a file is not linked up, but is cleared. 328 * Hence, resolved should not be cleared when 329 * linkup is answered no, but clri is answered yes. 330 */ 331 saveresolved = resolved; 332 if (linkup(idesc->id_number, (ino_t)0, NULL) == 0) { 333 resolved = saveresolved; 334 clri(idesc, "UNREF", 0); 335 return; 336 } 337 /* 338 * Account for the new reference created by linkup(). 339 */ 340 dp = ginode(idesc->id_number); 341 lcnt--; 342 } 343 } 344 if (lcnt != 0) { 345 pwarn("LINK COUNT %s", (lfdir == idesc->id_number) ? lfname : 346 ((dp->di_mode & IFMT) == IFDIR ? "DIR" : "FILE")); 347 pinode(idesc->id_number); 348 printf(" COUNT %d SHOULD BE %d", 349 dp->di_nlink, dp->di_nlink - lcnt); 350 if (preen || usedsoftdep) { 351 if (lcnt < 0) { 352 printf("\n"); 353 pfatal("LINK COUNT INCREASING"); 354 } 355 if (preen) 356 printf(" (ADJUSTED)\n"); 357 } 358 if (preen || reply("ADJUST") == 1) { 359 if (bkgrdflag == 0) { 360 dp->di_nlink -= lcnt; 361 inodirty(); 362 } else { 363 cmd.value = idesc->id_number; 364 cmd.size = -lcnt; 365 if (debug) 366 printf("adjrefcnt ino %ld amt %ld\n", 367 (long)cmd.value, cmd.size); 368 if (sysctl(adjrefcnt, MIBSIZE, 0, 0, 369 &cmd, sizeof cmd) == -1) 370 rwerror("ADJUST INODE", cmd.value); 371 } 372 } 373 } 374} 375 376static int 377mkentry(struct inodesc *idesc) 378{ 379 struct direct *dirp = idesc->id_dirp; 380 struct direct newent; 381 int newlen, oldlen; 382 383 newent.d_namlen = strlen(idesc->id_name); 384 newlen = DIRSIZ(0, &newent); 385 if (dirp->d_ino != 0) 386 oldlen = DIRSIZ(0, dirp); 387 else 388 oldlen = 0; 389 if (dirp->d_reclen - oldlen < newlen) 390 return (KEEPON); 391 newent.d_reclen = dirp->d_reclen - oldlen; 392 dirp->d_reclen = oldlen; 393 dirp = (struct direct *)(((char *)dirp) + oldlen); 394 dirp->d_ino = idesc->id_parent; /* ino to be entered is in id_parent */ 395 dirp->d_reclen = newent.d_reclen; 396 if (newinofmt) 397 dirp->d_type = inoinfo(idesc->id_parent)->ino_type; 398 else 399 dirp->d_type = 0; 400 dirp->d_namlen = newent.d_namlen; 401 memmove(dirp->d_name, idesc->id_name, (size_t)newent.d_namlen + 1); 402# if (BYTE_ORDER == LITTLE_ENDIAN) 403 /* 404 * If the entry was split, dirscan() will only reverse the byte 405 * order of the original entry, and not the new one, before 406 * writing it back out. So, we reverse the byte order here if 407 * necessary. 408 */ 409 if (oldlen != 0 && !newinofmt && !doinglevel2) { 410 u_char tmp; 411 412 tmp = dirp->d_namlen; 413 dirp->d_namlen = dirp->d_type; 414 dirp->d_type = tmp; 415 } 416# endif 417 return (ALTERED|STOP); 418} 419 420static int 421chgino(struct inodesc *idesc) 422{ 423 struct direct *dirp = idesc->id_dirp; 424 425 if (memcmp(dirp->d_name, idesc->id_name, (int)dirp->d_namlen + 1)) 426 return (KEEPON); 427 dirp->d_ino = idesc->id_parent; 428 if (newinofmt) 429 dirp->d_type = inoinfo(idesc->id_parent)->ino_type; 430 else 431 dirp->d_type = 0; 432 return (ALTERED|STOP); 433} 434 435int 436linkup(ino_t orphan, ino_t parentdir, char *name) 437{ 438 struct dinode *dp; 439 int lostdir; 440 ino_t oldlfdir; 441 struct inodesc idesc; 442 char tempname[BUFSIZ]; 443 444 memset(&idesc, 0, sizeof(struct inodesc)); 445 dp = ginode(orphan); 446 lostdir = (dp->di_mode & IFMT) == IFDIR; 447 pwarn("UNREF %s ", lostdir ? "DIR" : "FILE"); 448 pinode(orphan); 449 if (preen && dp->di_size == 0) 450 return (0); 451 if (cursnapshot != 0) { 452 pfatal("FILE LINKUP IN SNAPSHOT"); 453 return (0); 454 } 455 if (preen) 456 printf(" (RECONNECTED)\n"); 457 else 458 if (reply("RECONNECT") == 0) 459 return (0); 460 if (lfdir == 0) { 461 dp = ginode(ROOTINO); 462 idesc.id_name = lfname; 463 idesc.id_type = DATA; 464 idesc.id_func = findino; 465 idesc.id_number = ROOTINO; 466 if ((ckinode(dp, &idesc) & FOUND) != 0) { 467 lfdir = idesc.id_parent; 468 } else { 469 pwarn("NO lost+found DIRECTORY"); 470 if (preen || reply("CREATE")) { 471 lfdir = allocdir(ROOTINO, (ino_t)0, lfmode); 472 if (lfdir != 0) { 473 if (makeentry(ROOTINO, lfdir, lfname) != 0) { 474 numdirs++; 475 if (preen) 476 printf(" (CREATED)\n"); 477 } else { 478 freedir(lfdir, ROOTINO); 479 lfdir = 0; 480 if (preen) 481 printf("\n"); 482 } 483 } 484 } 485 } 486 if (lfdir == 0) { 487 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY"); 488 printf("\n\n"); 489 return (0); 490 } 491 } 492 dp = ginode(lfdir); 493 if ((dp->di_mode & IFMT) != IFDIR) { 494 pfatal("lost+found IS NOT A DIRECTORY"); 495 if (reply("REALLOCATE") == 0) 496 return (0); 497 oldlfdir = lfdir; 498 if ((lfdir = allocdir(ROOTINO, (ino_t)0, lfmode)) == 0) { 499 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 500 return (0); 501 } 502 if ((changeino(ROOTINO, lfname, lfdir) & ALTERED) == 0) { 503 pfatal("SORRY. CANNOT CREATE lost+found DIRECTORY\n\n"); 504 return (0); 505 } 506 inodirty(); 507 idesc.id_type = ADDR; 508 idesc.id_func = pass4check; 509 idesc.id_number = oldlfdir; 510 adjust(&idesc, inoinfo(oldlfdir)->ino_linkcnt + 1); 511 inoinfo(oldlfdir)->ino_linkcnt = 0; 512 dp = ginode(lfdir); 513 } 514 if (inoinfo(lfdir)->ino_state != DFOUND) { 515 pfatal("SORRY. NO lost+found DIRECTORY\n\n"); 516 return (0); 517 } 518 (void)lftempname(tempname, orphan); 519 if (makeentry(lfdir, orphan, (name ? name : tempname)) == 0) { 520 pfatal("SORRY. NO SPACE IN lost+found DIRECTORY"); 521 printf("\n\n"); 522 return (0); 523 } 524 inoinfo(orphan)->ino_linkcnt--; 525 if (lostdir) { 526 if ((changeino(orphan, "..", lfdir) & ALTERED) == 0 && 527 parentdir != (ino_t)-1) 528 (void)makeentry(orphan, lfdir, ".."); 529 dp = ginode(lfdir); 530 dp->di_nlink++; 531 inodirty(); 532 inoinfo(lfdir)->ino_linkcnt++; 533 pwarn("DIR I=%lu CONNECTED. ", (u_long)orphan); 534 if (parentdir != (ino_t)-1) { 535 printf("PARENT WAS I=%lu\n", (u_long)parentdir); 536 /* 537 * The parent directory, because of the ordering 538 * guarantees, has had the link count incremented 539 * for the child, but no entry was made. This 540 * fixes the parent link count so that fsck does 541 * not need to be rerun. 542 */ 543 inoinfo(parentdir)->ino_linkcnt++; 544 } 545 if (preen == 0) 546 printf("\n"); 547 } 548 return (1); 549} 550 551/* 552 * fix an entry in a directory. 553 */ 554int 555changeino(ino_t dir, char *name, ino_t newnum) 556{ 557 struct inodesc idesc; 558 559 memset(&idesc, 0, sizeof(struct inodesc)); 560 idesc.id_type = DATA; 561 idesc.id_func = chgino; 562 idesc.id_number = dir; 563 idesc.id_fix = DONTKNOW; 564 idesc.id_name = name; 565 idesc.id_parent = newnum; /* new value for name */ 566 return (ckinode(ginode(dir), &idesc)); 567} 568 569/* 570 * make an entry in a directory 571 */ 572int 573makeentry(ino_t parent, ino_t ino, char *name) 574{ 575 struct dinode *dp; 576 struct inodesc idesc; 577 char pathbuf[MAXPATHLEN + 1]; 578 579 if (parent < ROOTINO || parent >= maxino || 580 ino < ROOTINO || ino >= maxino) 581 return (0); 582 memset(&idesc, 0, sizeof(struct inodesc)); 583 idesc.id_type = DATA; 584 idesc.id_func = mkentry; 585 idesc.id_number = parent; 586 idesc.id_parent = ino; /* this is the inode to enter */ 587 idesc.id_fix = DONTKNOW; 588 idesc.id_name = name; 589 dp = ginode(parent); 590 if (dp->di_size % DIRBLKSIZ) { 591 dp->di_size = roundup(dp->di_size, DIRBLKSIZ); 592 inodirty(); 593 } 594 if ((ckinode(dp, &idesc) & ALTERED) != 0) 595 return (1); 596 getpathname(pathbuf, parent, parent); 597 dp = ginode(parent); 598 if (expanddir(dp, pathbuf) == 0) 599 return (0); 600 return (ckinode(dp, &idesc) & ALTERED); 601} 602 603/* 604 * Attempt to expand the size of a directory 605 */ 606static int 607expanddir(struct dinode *dp, char *name) 608{ 609 ufs_daddr_t lastbn, newblk; 610 struct bufarea *bp; 611 char *cp, firstblk[DIRBLKSIZ]; 612 613 lastbn = lblkno(&sblock, dp->di_size); 614 if (lastbn >= NDADDR - 1 || dp->di_db[lastbn] == 0 || dp->di_size == 0) 615 return (0); 616 if ((newblk = allocblk(sblock.fs_frag)) == 0) 617 return (0); 618 dp->di_db[lastbn + 1] = dp->di_db[lastbn]; 619 dp->di_db[lastbn] = newblk; 620 dp->di_size += sblock.fs_bsize; 621 dp->di_blocks += btodb(sblock.fs_bsize); 622 bp = getdirblk(dp->di_db[lastbn + 1], 623 (long)dblksize(&sblock, dp, lastbn + 1)); 624 if (bp->b_errs) 625 goto bad; 626 memmove(firstblk, bp->b_un.b_buf, DIRBLKSIZ); 627 bp = getdirblk(newblk, sblock.fs_bsize); 628 if (bp->b_errs) 629 goto bad; 630 memmove(bp->b_un.b_buf, firstblk, DIRBLKSIZ); 631 for (cp = &bp->b_un.b_buf[DIRBLKSIZ]; 632 cp < &bp->b_un.b_buf[sblock.fs_bsize]; 633 cp += DIRBLKSIZ) 634 memmove(cp, &emptydir, sizeof emptydir); 635 dirty(bp); 636 bp = getdirblk(dp->di_db[lastbn + 1], 637 (long)dblksize(&sblock, dp, lastbn + 1)); 638 if (bp->b_errs) 639 goto bad; 640 memmove(bp->b_un.b_buf, &emptydir, sizeof emptydir); 641 pwarn("NO SPACE LEFT IN %s", name); 642 if (preen) 643 printf(" (EXPANDED)\n"); 644 else if (reply("EXPAND") == 0) 645 goto bad; 646 dirty(bp); 647 inodirty(); 648 return (1); 649bad: 650 dp->di_db[lastbn] = dp->di_db[lastbn + 1]; 651 dp->di_db[lastbn + 1] = 0; 652 dp->di_size -= sblock.fs_bsize; 653 dp->di_blocks -= btodb(sblock.fs_bsize); 654 freeblk(newblk, sblock.fs_frag); 655 return (0); 656} 657 658/* 659 * allocate a new directory 660 */ 661ino_t 662allocdir(ino_t parent, ino_t request, int mode) 663{ 664 ino_t ino; 665 char *cp; 666 struct dinode *dp; 667 struct bufarea *bp; 668 struct inoinfo *inp; 669 struct dirtemplate *dirp; 670 671 ino = allocino(request, IFDIR|mode); 672 if (newinofmt) 673 dirp = &dirhead; 674 else 675 dirp = (struct dirtemplate *)&odirhead; 676 dirp->dot_ino = ino; 677 dirp->dotdot_ino = parent; 678 dp = ginode(ino); 679 bp = getdirblk(dp->di_db[0], sblock.fs_fsize); 680 if (bp->b_errs) { 681 freeino(ino); 682 return (0); 683 } 684 memmove(bp->b_un.b_buf, dirp, sizeof(struct dirtemplate)); 685 for (cp = &bp->b_un.b_buf[DIRBLKSIZ]; 686 cp < &bp->b_un.b_buf[sblock.fs_fsize]; 687 cp += DIRBLKSIZ) 688 memmove(cp, &emptydir, sizeof emptydir); 689 dirty(bp); 690 dp->di_nlink = 2; 691 inodirty(); 692 if (ino == ROOTINO) { 693 inoinfo(ino)->ino_linkcnt = dp->di_nlink; 694 cacheino(dp, ino); 695 return(ino); 696 } 697 if (inoinfo(parent)->ino_state != DSTATE && 698 inoinfo(parent)->ino_state != DFOUND) { 699 freeino(ino); 700 return (0); 701 } 702 cacheino(dp, ino); 703 inp = getinoinfo(ino); 704 inp->i_parent = parent; 705 inp->i_dotdot = parent; 706 inoinfo(ino)->ino_state = inoinfo(parent)->ino_state; 707 if (inoinfo(ino)->ino_state == DSTATE) { 708 inoinfo(ino)->ino_linkcnt = dp->di_nlink; 709 inoinfo(parent)->ino_linkcnt++; 710 } 711 dp = ginode(parent); 712 dp->di_nlink++; 713 inodirty(); 714 return (ino); 715} 716 717/* 718 * free a directory inode 719 */ 720static void 721freedir(ino_t ino, ino_t parent) 722{ 723 struct dinode *dp; 724 725 if (ino != parent) { 726 dp = ginode(parent); 727 dp->di_nlink--; 728 inodirty(); 729 } 730 freeino(ino); 731} 732 733/* 734 * generate a temporary name for the lost+found directory. 735 */ 736static int 737lftempname(char *bufp, ino_t ino) 738{ 739 ino_t in; 740 char *cp; 741 int namlen; 742 743 cp = bufp + 2; 744 for (in = maxino; in > 0; in /= 10) 745 cp++; 746 *--cp = 0; 747 namlen = cp - bufp; 748 in = ino; 749 while (cp > bufp) { 750 *--cp = (in % 10) + '0'; 751 in /= 10; 752 } 753 *cp = '#'; 754 return (namlen); 755} 756 757/* 758 * Get a directory block. 759 * Insure that it is held until another is requested. 760 */ 761static struct bufarea * 762getdirblk(ufs_daddr_t blkno, long size) 763{ 764 765 if (pdirbp != 0) 766 pdirbp->b_flags &= ~B_INUSE; 767 pdirbp = getdatablk(blkno, size); 768 return (pdirbp); 769} 770