1 /* 2 * Copyright (c) 1980, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Robert Elz at The University of Melbourne. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#) Copyright (c) 1980, 1990, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)quotacheck.c 8.3 (Berkeley) 1/29/94 34 * $FreeBSD: src/sbin/quotacheck/quotacheck.c,v 1.11 1999/08/28 00:14:01 peter Exp $ 35 */ 36 37 /* 38 * Fix up / report on disk quotas & usage 39 */ 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 43 #include <vfs/ufs/dinode.h> 44 #include <vfs/ufs/quota.h> 45 #include <vfs/ufs/fs.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <fstab.h> 51 #include <grp.h> 52 #include <pwd.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 const char *qfname = QUOTAFILENAME; 59 const char *qfextension[] = INITQFNAMES; 60 const char *quotagroup = QUOTAGROUP; 61 62 union { 63 struct fs sblk; 64 char dummy[MAXBSIZE]; 65 } un; 66 #define sblock un.sblk 67 long dev_bsize = 1; 68 ino_t quotamaxino; 69 70 struct quotaname { 71 long flags; 72 char grpqfname[MAXPATHLEN + 1]; 73 char usrqfname[MAXPATHLEN + 1]; 74 }; 75 #define HASUSR 1 76 #define HASGRP 2 77 78 struct fileusage { 79 struct fileusage *fu_next; 80 u_long fu_curinodes; 81 u_long fu_curblocks; 82 u_long fu_id; 83 char fu_name[1]; 84 /* actually bigger */ 85 }; 86 #define FUHASH 1024 /* must be power of two */ 87 struct fileusage *fuhead[MAXQUOTAS][FUHASH]; 88 89 int aflag; /* all file systems */ 90 int gflag; /* check group quotas */ 91 int uflag; /* check user quotas */ 92 int vflag; /* verbose */ 93 int fi; /* open disk file descriptor */ 94 u_long highid[MAXQUOTAS]; /* highest addid()'ed identifier per type */ 95 96 struct fileusage * 97 addid(u_long, int, char *); 98 char *blockcheck(char *); 99 void bread(daddr_t, char *, long); 100 extern int checkfstab(int, int, void * (*)(struct fstab *), 101 int (*)(char *, char *, struct quotaname *)); 102 int chkquota(char *, char *, struct quotaname *); 103 void freeinodebuf(void); 104 struct ufs1_dinode * 105 getnextinode(ino_t); 106 int getquotagid(void); 107 int hasquota(struct fstab *, int, char **); 108 struct fileusage * 109 lookup(u_long, int); 110 void *needchk(struct fstab *); 111 int oneof(char *, char*[], int); 112 void resetinodebuf(void); 113 int update(char *, char *, int); 114 void usage(void) __dead2; 115 116 int 117 main(int argc, char **argv) 118 { 119 struct fstab *fs; 120 struct passwd *pw; 121 struct group *gr; 122 struct quotaname *auxdata; 123 int i, argnum, maxrun, errs; 124 long done = 0; 125 char ch, *name; 126 127 errs = maxrun = 0; 128 while ((ch = getopt(argc, argv, "aguvl:")) != -1) { 129 switch(ch) { 130 case 'a': 131 aflag++; 132 break; 133 case 'g': 134 gflag++; 135 break; 136 case 'u': 137 uflag++; 138 break; 139 case 'v': 140 vflag++; 141 break; 142 case 'l': 143 maxrun = atoi(optarg); 144 break; 145 default: 146 usage(); 147 } 148 } 149 argc -= optind; 150 argv += optind; 151 if ((argc == 0 && !aflag) || (argc > 0 && aflag)) 152 usage(); 153 if (!gflag && !uflag) { 154 gflag++; 155 uflag++; 156 } 157 if (gflag) { 158 setgrent(); 159 while ((gr = getgrent()) != NULL) 160 addid((u_long)gr->gr_gid, GRPQUOTA, gr->gr_name); 161 endgrent(); 162 } 163 if (uflag) { 164 setpwent(); 165 while ((pw = getpwent()) != NULL) 166 addid((u_long)pw->pw_uid, USRQUOTA, pw->pw_name); 167 endpwent(); 168 } 169 if (aflag) 170 exit(checkfstab(1, maxrun, needchk, chkquota)); 171 if (setfsent() == 0) 172 errx(1, "%s: can't open", FSTAB); 173 while ((fs = getfsent()) != NULL) { 174 if (((argnum = oneof(fs->fs_file, argv, argc)) >= 0 || 175 (argnum = oneof(fs->fs_spec, argv, argc)) >= 0) && 176 (auxdata = needchk(fs)) && 177 (name = blockcheck(fs->fs_spec))) { 178 done |= 1 << argnum; 179 errs += chkquota(name, fs->fs_file, auxdata); 180 } 181 } 182 endfsent(); 183 for (i = 0; i < argc; i++) 184 if ((done & (1 << i)) == 0) 185 fprintf(stderr, "%s not found in %s\n", 186 argv[i], FSTAB); 187 exit(errs); 188 } 189 190 void 191 usage(void) 192 { 193 fprintf(stderr, "%s\n%s\n", 194 "usage: quotacheck -a [-guv]", 195 " quotacheck [-guv] filesys ..."); 196 exit(1); 197 } 198 199 void * 200 needchk(struct fstab *fs) 201 { 202 struct quotaname *qnp; 203 char *qfnp; 204 205 if (strcmp(fs->fs_vfstype, "ufs") || 206 strcmp(fs->fs_type, FSTAB_RW)) 207 return (NULL); 208 if ((qnp = malloc(sizeof(*qnp))) == NULL) 209 errx(1, "malloc failed"); 210 qnp->flags = 0; 211 if (gflag && hasquota(fs, GRPQUOTA, &qfnp)) { 212 strcpy(qnp->grpqfname, qfnp); 213 qnp->flags |= HASGRP; 214 } 215 if (uflag && hasquota(fs, USRQUOTA, &qfnp)) { 216 strcpy(qnp->usrqfname, qfnp); 217 qnp->flags |= HASUSR; 218 } 219 if (qnp->flags) 220 return (qnp); 221 free(qnp); 222 return (NULL); 223 } 224 225 /* 226 * Scan the specified filesystem to check quota(s) present on it. 227 */ 228 int 229 chkquota(char *fsname, char *mntpt, struct quotaname *qnp) 230 { 231 struct fileusage *fup; 232 struct ufs1_dinode *dp; 233 int cg, i, mode, errs = 0; 234 ino_t ino; 235 236 if ((fi = open(fsname, O_RDONLY, 0)) < 0) { 237 warn("%s", fsname); 238 return (1); 239 } 240 if (vflag) { 241 printf("*** Checking "); 242 if (qnp->flags & HASUSR) 243 printf("%s%s", qfextension[USRQUOTA], 244 (qnp->flags & HASGRP) ? " and " : ""); 245 if (qnp->flags & HASGRP) 246 printf("%s", qfextension[GRPQUOTA]); 247 printf(" quotas for %s (%s)\n", fsname, mntpt); 248 } 249 sync(); 250 dev_bsize = 1; 251 bread(SBOFF, (char *)&sblock, (long)SBSIZE); 252 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 253 quotamaxino = sblock.fs_ncg * sblock.fs_ipg; 254 resetinodebuf(); 255 for (ino = 0, cg = 0; cg < sblock.fs_ncg; cg++) { 256 for (i = 0; i < sblock.fs_ipg; i++, ino++) { 257 if (ino < ROOTINO) 258 continue; 259 if ((dp = getnextinode(ino)) == NULL) 260 continue; 261 if ((mode = dp->di_mode & IFMT) == 0) 262 continue; 263 if (qnp->flags & HASGRP) { 264 fup = addid((u_long)dp->di_gid, GRPQUOTA, 265 NULL); 266 fup->fu_curinodes++; 267 if (mode == IFREG || mode == IFDIR || 268 mode == IFLNK) 269 fup->fu_curblocks += dp->di_blocks; 270 } 271 if (qnp->flags & HASUSR) { 272 fup = addid((u_long)dp->di_uid, USRQUOTA, 273 NULL); 274 fup->fu_curinodes++; 275 if (mode == IFREG || mode == IFDIR || 276 mode == IFLNK) 277 fup->fu_curblocks += dp->di_blocks; 278 } 279 } 280 } 281 freeinodebuf(); 282 if (qnp->flags & HASUSR) 283 errs += update(mntpt, qnp->usrqfname, USRQUOTA); 284 if (qnp->flags & HASGRP) 285 errs += update(mntpt, qnp->grpqfname, GRPQUOTA); 286 close(fi); 287 return (errs); 288 } 289 290 /* 291 * Update a specified quota file. 292 */ 293 int 294 update(char *fsname, char *quotafile, int type) 295 { 296 struct fileusage *fup; 297 FILE *qfi, *qfo; 298 u_long id, lastid; 299 off_t offset; 300 struct ufs_dqblk dqbuf; 301 static int warned = 0; 302 static struct ufs_dqblk zerodqbuf; 303 static struct fileusage zerofileusage; 304 305 if ((qfo = fopen(quotafile, "r+")) == NULL) { 306 if (errno == ENOENT) 307 qfo = fopen(quotafile, "w+"); 308 if (qfo) { 309 warnx("creating quota file %s", quotafile); 310 #define MODE (S_IRUSR|S_IWUSR|S_IRGRP) 311 fchown(fileno(qfo), getuid(), getquotagid()); 312 fchmod(fileno(qfo), MODE); 313 } else { 314 warn("%s", quotafile); 315 return (1); 316 } 317 } 318 if ((qfi = fopen(quotafile, "r")) == NULL) { 319 warn("%s", quotafile); 320 fclose(qfo); 321 return (1); 322 } 323 if (quotactl(fsname, QCMD(Q_SYNC, type), (u_long)0, (caddr_t)0) < 0 && 324 errno == EOPNOTSUPP && !warned && vflag) { 325 warned++; 326 printf("*** Warning: %s\n", 327 "Quotas are not compiled into this kernel"); 328 } 329 for (lastid = highid[type], id = 0, offset = 0; id <= lastid; 330 id++, offset += sizeof(struct ufs_dqblk)) { 331 if (fread((char *)&dqbuf, sizeof(struct ufs_dqblk), 1, qfi) == 0) 332 dqbuf = zerodqbuf; 333 if ((fup = lookup(id, type)) == NULL) 334 fup = &zerofileusage; 335 if (dqbuf.dqb_curinodes == fup->fu_curinodes && 336 dqbuf.dqb_curblocks == fup->fu_curblocks) { 337 fup->fu_curinodes = 0; 338 fup->fu_curblocks = 0; 339 continue; 340 } 341 if (vflag) { 342 if (aflag) 343 printf("%s: ", fsname); 344 printf("%-8s fixed:", fup->fu_name); 345 if (dqbuf.dqb_curinodes != fup->fu_curinodes) 346 printf("\tinodes %lu -> %lu", 347 (u_long)dqbuf.dqb_curinodes, 348 (u_long)fup->fu_curinodes); 349 if (dqbuf.dqb_curblocks != fup->fu_curblocks) 350 printf("\tblocks %lu -> %lu", 351 (u_long)dqbuf.dqb_curblocks, 352 (u_long)fup->fu_curblocks); 353 printf("\n"); 354 } 355 /* 356 * Reset time limit if have a soft limit and were 357 * previously under it, but are now over it. 358 */ 359 if (dqbuf.dqb_bsoftlimit && 360 dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit && 361 fup->fu_curblocks >= dqbuf.dqb_bsoftlimit) 362 dqbuf.dqb_btime = 0; 363 if (dqbuf.dqb_isoftlimit && 364 dqbuf.dqb_curblocks < dqbuf.dqb_isoftlimit && 365 fup->fu_curblocks >= dqbuf.dqb_isoftlimit) 366 dqbuf.dqb_itime = 0; 367 dqbuf.dqb_curinodes = fup->fu_curinodes; 368 dqbuf.dqb_curblocks = fup->fu_curblocks; 369 if (fseek(qfo, (long)offset, SEEK_SET) < 0) { 370 warn("%s: seek failed", quotafile); 371 return(1); 372 } 373 fwrite((char *)&dqbuf, sizeof(struct ufs_dqblk), 1, qfo); 374 quotactl(fsname, QCMD(Q_SETUSE, type), id, 375 (caddr_t)&dqbuf); 376 fup->fu_curinodes = 0; 377 fup->fu_curblocks = 0; 378 } 379 fclose(qfi); 380 fflush(qfo); 381 ftruncate(fileno(qfo), 382 (off_t)((highid[type] + 1) * sizeof(struct ufs_dqblk))); 383 fclose(qfo); 384 return (0); 385 } 386 387 /* 388 * Check to see if target appears in list of size cnt. 389 */ 390 int 391 oneof(char *target, char **list, int cnt) 392 { 393 int i; 394 395 for (i = 0; i < cnt; i++) 396 if (strcmp(target, list[i]) == 0) 397 return (i); 398 return (-1); 399 } 400 401 /* 402 * Determine the group identifier for quota files. 403 */ 404 int 405 getquotagid(void) 406 { 407 struct group *gr; 408 409 if ((gr = getgrnam(quotagroup)) != NULL) 410 return (gr->gr_gid); 411 return (-1); 412 } 413 414 /* 415 * Check to see if a particular quota is to be enabled. 416 */ 417 int 418 hasquota(struct fstab *fs, int type, char **qfnamep) 419 { 420 char *opt; 421 char *cp; 422 static char initname, usrname[100], grpname[100]; 423 static char buf[BUFSIZ]; 424 425 if (!initname) { 426 snprintf(usrname, sizeof(usrname), 427 "%s%s", qfextension[USRQUOTA], qfname); 428 snprintf(grpname, sizeof(grpname), 429 "%s%s", qfextension[GRPQUOTA], qfname); 430 initname = 1; 431 } 432 strcpy(buf, fs->fs_mntops); 433 for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) { 434 if ((cp = strchr(opt, '=')) != NULL) 435 *cp++ = '\0'; 436 if (type == USRQUOTA && strcmp(opt, usrname) == 0) 437 break; 438 if (type == GRPQUOTA && strcmp(opt, grpname) == 0) 439 break; 440 } 441 if (!opt) 442 return (0); 443 if (cp) 444 *qfnamep = cp; 445 else { 446 snprintf(buf, sizeof(buf), 447 "%s/%s.%s", fs->fs_file, qfname, qfextension[type]); 448 *qfnamep = buf; 449 } 450 return (1); 451 } 452 453 /* 454 * Routines to manage the file usage table. 455 * 456 * Lookup an id of a specific type. 457 */ 458 struct fileusage * 459 lookup(u_long id, int type) 460 { 461 struct fileusage *fup; 462 463 for (fup = fuhead[type][id & (FUHASH-1)]; fup != NULL; fup = fup->fu_next) 464 if (fup->fu_id == id) 465 return (fup); 466 return (NULL); 467 } 468 469 /* 470 * Add a new file usage id if it does not already exist. 471 */ 472 struct fileusage * 473 addid(u_long id, int type, char *name) 474 { 475 struct fileusage *fup, **fhp; 476 int len; 477 478 if ((fup = lookup(id, type)) != NULL) 479 return (fup); 480 if (name) 481 len = strlen(name); 482 else 483 len = 10; 484 if ((fup = calloc(1, sizeof(*fup) + len)) == NULL) 485 errx(1, "calloc failed"); 486 fhp = &fuhead[type][id & (FUHASH - 1)]; 487 fup->fu_next = *fhp; 488 *fhp = fup; 489 fup->fu_id = id; 490 if (id > highid[type]) 491 highid[type] = id; 492 if (name) 493 bcopy(name, fup->fu_name, len + 1); 494 else { 495 sprintf(fup->fu_name, "%lu", id); 496 if (vflag) 497 printf("unknown %cid: %lu\n", 498 type == USRQUOTA ? 'u' : 'g', id); 499 } 500 return (fup); 501 } 502 503 /* 504 * Special purpose version of ginode used to optimize pass 505 * over all the inodes in numerical order. 506 */ 507 ino_t nextino, lastinum; 508 long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize; 509 struct ufs1_dinode *inodebuf; 510 #define INOBUFSIZE 56*1024 /* size of buffer to read inodes */ 511 512 struct ufs1_dinode * 513 getnextinode(ino_t inumber) 514 { 515 long size; 516 daddr_t dblk; 517 static struct ufs1_dinode *dp; 518 519 if (inumber != nextino++ || inumber > quotamaxino) { 520 errx(1, "bad inode number %ju to nextinode", 521 (intmax_t)inumber); 522 } 523 if (inumber >= lastinum) { 524 readcnt++; 525 dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum)); 526 if (readcnt % readpercg == 0) { 527 size = partialsize; 528 lastinum += partialcnt; 529 } else { 530 size = inobufsize; 531 lastinum += fullcnt; 532 } 533 bread(dblk, (char *)inodebuf, size); 534 dp = inodebuf; 535 } 536 return (dp++); 537 } 538 539 /* 540 * Prepare to scan a set of inodes. 541 */ 542 void 543 resetinodebuf(void) 544 { 545 546 nextino = 0; 547 lastinum = 0; 548 readcnt = 0; 549 inobufsize = blkroundup(&sblock, INOBUFSIZE); 550 fullcnt = inobufsize / sizeof(struct ufs1_dinode); 551 readpercg = sblock.fs_ipg / fullcnt; 552 partialcnt = sblock.fs_ipg % fullcnt; 553 partialsize = partialcnt * sizeof(struct ufs1_dinode); 554 if (partialcnt != 0) { 555 readpercg++; 556 } else { 557 partialcnt = fullcnt; 558 partialsize = inobufsize; 559 } 560 if (inodebuf == NULL && 561 (inodebuf = malloc((u_int)inobufsize)) == NULL) 562 errx(1, "malloc failed"); 563 while (nextino < ROOTINO) 564 getnextinode(nextino); 565 } 566 567 /* 568 * Free up data structures used to scan inodes. 569 */ 570 void 571 freeinodebuf(void) 572 { 573 574 if (inodebuf != NULL) 575 free(inodebuf); 576 inodebuf = NULL; 577 } 578 579 /* 580 * Read specified disk blocks. 581 */ 582 void 583 bread(daddr_t bno, char *buf, long cnt) 584 { 585 586 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0 || 587 read(fi, buf, cnt) != cnt) 588 errx(1, "block %ld", (long)bno); 589 } 590