summaryrefslogtreecommitdiffstats
path: root/sbin/fsck_ffs/pass5.c
blob: 3275894de173bffc3c7db0e4f90f487236387a63 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
/*
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static const char sccsid[] = "@(#)pass5.c	8.9 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/sysctl.h>

#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>

#include <err.h>
#include <inttypes.h>
#include <limits.h>
#include <string.h>

#include "fsck.h"

static void check_maps(u_char *, u_char *, int, int, const char *, int *, int, int);

void
pass5(void)
{
	int c, i, j, blk, frags, basesize, mapsize;
	int inomapsize, blkmapsize;
	struct fs *fs = &sblock;
	struct cg *cg = &cgrp;
	ufs2_daddr_t d, dbase, dmax;
	int excessdirs, rewritecg = 0;
	struct csum *cs;
	struct csum_total cstotal;
	struct inodesc idesc[3];
	char buf[MAXBSIZE];
	struct cg *newcg = (struct cg *)buf;

	inoinfo(WINO)->ino_state = USTATE;
	memset(newcg, 0, (size_t)fs->fs_cgsize);
	newcg->cg_niblk = fs->fs_ipg;
	if (cvtlevel >= 3) {
		if (fs->fs_maxcontig < 2 && fs->fs_contigsumsize > 0) {
			if (preen)
				pwarn("DELETING CLUSTERING MAPS\n");
			if (preen || reply("DELETE CLUSTERING MAPS")) {
				fs->fs_contigsumsize = 0;
				rewritecg = 1;
				sbdirty();
			}
		}
		if (fs->fs_maxcontig > 1) {
			const char *doit = 0;

			if (fs->fs_contigsumsize < 1) {
				doit = "CREAT";
			} else if (fs->fs_contigsumsize < fs->fs_maxcontig &&
				   fs->fs_contigsumsize < FS_MAXCONTIG) {
				doit = "EXPAND";
			}
			if (doit) {
				i = fs->fs_contigsumsize;
				fs->fs_contigsumsize =
				    MIN(fs->fs_maxcontig, FS_MAXCONTIG);
				if (CGSIZE(fs) > (u_int)fs->fs_bsize) {
					pwarn("CANNOT %s CLUSTER MAPS\n", doit);
					fs->fs_contigsumsize = i;
				} else if (preen ||
				    reply("CREATE CLUSTER MAPS")) {
					if (preen)
						pwarn("%sING CLUSTER MAPS\n",
						    doit);
					fs->fs_cgsize =
					    fragroundup(fs, CGSIZE(fs));
					rewritecg = 1;
					sbdirty();
				}
			}
		}
	}
	basesize = &newcg->cg_space[0] - (u_char *)(&newcg->cg_firstfield);
	if (sblock.fs_magic == FS_UFS2_MAGIC) {
		newcg->cg_iusedoff = basesize;
	} else {
		/*
		 * We reserve the space for the old rotation summary
		 * tables for the benefit of old kernels, but do not
		 * maintain them in modern kernels. In time, they can
		 * go away.
		 */
		newcg->cg_old_btotoff = basesize;
		newcg->cg_old_boff = newcg->cg_old_btotoff +
		    fs->fs_old_cpg * sizeof(int32_t);
		newcg->cg_iusedoff = newcg->cg_old_boff +
		    fs->fs_old_cpg * fs->fs_old_nrpos * sizeof(u_int16_t);
		memset(&newcg->cg_space[0], 0, newcg->cg_iusedoff - basesize);
	}
	inomapsize = howmany(fs->fs_ipg, CHAR_BIT);
	newcg->cg_freeoff = newcg->cg_iusedoff + inomapsize;
	blkmapsize = howmany(fs->fs_fpg, CHAR_BIT);
	newcg->cg_nextfreeoff = newcg->cg_freeoff + blkmapsize;
	if (fs->fs_contigsumsize > 0) {
		newcg->cg_clustersumoff = newcg->cg_nextfreeoff -
		    sizeof(u_int32_t);
		newcg->cg_clustersumoff =
		    roundup(newcg->cg_clustersumoff, sizeof(u_int32_t));
		newcg->cg_clusteroff = newcg->cg_clustersumoff +
		    (fs->fs_contigsumsize + 1) * sizeof(u_int32_t);
		newcg->cg_nextfreeoff = newcg->cg_clusteroff +
		    howmany(fragstoblks(fs, fs->fs_fpg), CHAR_BIT);
	}
	newcg->cg_magic = CG_MAGIC;
	mapsize = newcg->cg_nextfreeoff - newcg->cg_iusedoff;
	memset(&idesc[0], 0, sizeof idesc);
	for (i = 0; i < 3; i++)
		idesc[i].id_type = ADDR;
	memset(&cstotal, 0, sizeof(struct csum_total));
	dmax = blknum(fs, fs->fs_size + fs->fs_frag - 1);
	for (d = fs->fs_size; d < dmax; d++)
		setbmap(d);
	for (c = 0; c < fs->fs_ncg; c++) {
		if (got_siginfo) {
			printf("%s: phase 5: cyl group %d of %d (%d%%)\n",
			    cdevname, c, sblock.fs_ncg,
			    c * 100 / sblock.fs_ncg);
			got_siginfo = 0;
		}
		if (got_sigalarm) {
			setproctitle("%s p5 %d%%", cdevname,
			    c * 100 / sblock.fs_ncg);
			got_sigalarm = 0;
		}
		getblk(&cgblk, cgtod(fs, c), fs->fs_cgsize);
		if (!cg_chkmagic(cg))
			pfatal("CG %d: BAD MAGIC NUMBER\n", c);
		newcg->cg_time = cg->cg_time;
		newcg->cg_old_time = cg->cg_old_time;
		newcg->cg_unrefs = cg->cg_unrefs;
		newcg->cg_cgx = c;
		dbase = cgbase(fs, c);
		dmax = dbase + fs->fs_fpg;
		if (dmax > fs->fs_size)
			dmax = fs->fs_size;
		newcg->cg_ndblk = dmax - dbase;
		if (fs->fs_magic == FS_UFS1_MAGIC) {
			if (c == fs->fs_ncg - 1)
				newcg->cg_old_ncyl = howmany(newcg->cg_ndblk,
				    fs->fs_fpg / fs->fs_old_cpg);
			else
				newcg->cg_old_ncyl = fs->fs_old_cpg;
			newcg->cg_old_niblk = fs->fs_ipg;
			newcg->cg_niblk = 0;
		}
		if (fs->fs_contigsumsize > 0)
			newcg->cg_nclusterblks = newcg->cg_ndblk / fs->fs_frag;
		newcg->cg_cs.cs_ndir = 0;
		newcg->cg_cs.cs_nffree = 0;
		newcg->cg_cs.cs_nbfree = 0;
		newcg->cg_cs.cs_nifree = fs->fs_ipg;
		if (cg->cg_rotor >= 0 && cg->cg_rotor < newcg->cg_ndblk)
			newcg->cg_rotor = cg->cg_rotor;
		else
			newcg->cg_rotor = 0;
		if (cg->cg_frotor >= 0 && cg->cg_frotor < newcg->cg_ndblk)
			newcg->cg_frotor = cg->cg_frotor;
		else
			newcg->cg_frotor = 0;
		if (cg->cg_irotor >= 0 && cg->cg_irotor < fs->fs_ipg)
			newcg->cg_irotor = cg->cg_irotor;
		else
			newcg->cg_irotor = 0;
		if (fs->fs_magic == FS_UFS1_MAGIC) {
			newcg->cg_initediblk = 0;
		} else {
			if ((unsigned)cg->cg_initediblk > fs->fs_ipg)
				newcg->cg_initediblk = fs->fs_ipg;
			else
				newcg->cg_initediblk = cg->cg_initediblk;
		}
		memset(&newcg->cg_frsum[0], 0, sizeof newcg->cg_frsum);
		memset(cg_inosused(newcg), 0, (size_t)(mapsize));
		j = fs->fs_ipg * c;
		for (i = 0; i < inostathead[c].il_numalloced; j++, i++) {
			switch (inoinfo(j)->ino_state) {

			case USTATE:
				break;

			case DSTATE:
			case DCLEAR:
			case DFOUND:
			case DZLINK:
				newcg->cg_cs.cs_ndir++;
				/* FALLTHROUGH */

			case FSTATE:
			case FCLEAR:
			case FZLINK:
				newcg->cg_cs.cs_nifree--;
				setbit(cg_inosused(newcg), i);
				break;

			default:
				if (j < (int)ROOTINO)
					break;
				errx(EEXIT, "BAD STATE %d FOR INODE I=%d",
				    inoinfo(j)->ino_state, j);
			}
		}
		if (c == 0)
			for (i = 0; i < (int)ROOTINO; i++) {
				setbit(cg_inosused(newcg), i);
				newcg->cg_cs.cs_nifree--;
			}
		for (i = 0, d = dbase;
		     d < dmax;
		     d += fs->fs_frag, i += fs->fs_frag) {
			frags = 0;
			for (j = 0; j < fs->fs_frag; j++) {
				if (testbmap(d + j))
					continue;
				setbit(cg_blksfree(newcg), i + j);
				frags++;
			}
			if (frags == fs->fs_frag) {
				newcg->cg_cs.cs_nbfree++;
				if (fs->fs_contigsumsize > 0)
					setbit(cg_clustersfree(newcg),
					    i / fs->fs_frag);
			} else if (frags > 0) {
				newcg->cg_cs.cs_nffree += frags;
				blk = blkmap(fs, cg_blksfree(newcg), i);
				ffs_fragacct(fs, blk, newcg->cg_frsum, 1);
			}
		}
		if (fs->fs_contigsumsize > 0) {
			int32_t *sump = cg_clustersum(newcg);
			u_char *mapp = cg_clustersfree(newcg);
			int map = *mapp++;
			int bit = 1;
			int run = 0;

			for (i = 0; i < newcg->cg_nclusterblks; i++) {
				if ((map & bit) != 0) {
					run++;
				} else if (run != 0) {
					if (run > fs->fs_contigsumsize)
						run = fs->fs_contigsumsize;
					sump[run]++;
					run = 0;
				}
				if ((i & (CHAR_BIT - 1)) != (CHAR_BIT - 1)) {
					bit <<= 1;
				} else {
					map = *mapp++;
					bit = 1;
				}
			}
			if (run != 0) {
				if (run > fs->fs_contigsumsize)
					run = fs->fs_contigsumsize;
				sump[run]++;
			}
		}
		cstotal.cs_nffree += newcg->cg_cs.cs_nffree;
		cstotal.cs_nbfree += newcg->cg_cs.cs_nbfree;
		cstotal.cs_nifree += newcg->cg_cs.cs_nifree;
		cstotal.cs_ndir += newcg->cg_cs.cs_ndir;
		cs = &fs->fs_cs(fs, c);
		if (cursnapshot == 0 &&
		    memcmp(&newcg->cg_cs, cs, sizeof *cs) != 0 &&
		    dofix(&idesc[0], "FREE BLK COUNT(S) WRONG IN SUPERBLK")) {
			memmove(cs, &newcg->cg_cs, sizeof *cs);
			sbdirty();
		}
		if (rewritecg) {
			memmove(cg, newcg, (size_t)fs->fs_cgsize);
			cgdirty();
			continue;
		}
		if (cursnapshot == 0 &&
		    memcmp(newcg, cg, basesize) != 0 &&
		    dofix(&idesc[2], "SUMMARY INFORMATION BAD")) {
			memmove(cg, newcg, (size_t)basesize);
			cgdirty();
		}
		if (bkgrdflag != 0 || usedsoftdep || debug) {
			excessdirs = cg->cg_cs.cs_ndir - newcg->cg_cs.cs_ndir;
			if (excessdirs < 0) {
				pfatal("LOST %d DIRECTORIES\n", -excessdirs);
				excessdirs = 0;
			}
			if (excessdirs > 0)
				check_maps(cg_inosused(newcg), cg_inosused(cg),
				    inomapsize, cg->cg_cgx * fs->fs_ipg, "DIR",
				    freedirs, 0, excessdirs);
			check_maps(cg_inosused(newcg), cg_inosused(cg),
			    inomapsize, cg->cg_cgx * fs->fs_ipg, "FILE",
			    freefiles, excessdirs, fs->fs_ipg);
			check_maps(cg_blksfree(cg), cg_blksfree(newcg),
			    blkmapsize, cg->cg_cgx * fs->fs_fpg, "FRAG",
			    freeblks, 0, fs->fs_fpg);
		}
		if (cursnapshot == 0 &&
		    memcmp(cg_inosused(newcg), cg_inosused(cg), mapsize) != 0 &&
		    dofix(&idesc[1], "BLK(S) MISSING IN BIT MAPS")) {
			memmove(cg_inosused(cg), cg_inosused(newcg),
			      (size_t)mapsize);
			cgdirty();
		}
	}
	if (cursnapshot == 0 &&
	    memcmp(&cstotal, &fs->fs_cstotal, sizeof cstotal) != 0
	    && dofix(&idesc[0], "SUMMARY BLK COUNT(S) WRONG IN SUPERBLK")) {
		memmove(&fs->fs_cstotal, &cstotal, sizeof cstotal);
		fs->fs_ronly = 0;
		fs->fs_fmod = 0;
		sbdirty();
	}

	/*
	 * When doing background fsck on a snapshot, figure out whether
	 * the superblock summary is inaccurate and correct it when
	 * necessary.
	 */
	if (cursnapshot != 0) {
		cmd.size = 1;

		cmd.value = cstotal.cs_ndir - fs->fs_cstotal.cs_ndir;
		if (cmd.value != 0) {
			if (debug)
				printf("adjndir by %+" PRIi64 "\n", cmd.value);
			if (bkgrdsumadj == 0 || sysctl(adjndir, MIBSIZE, 0, 0,
			    &cmd, sizeof cmd) == -1)
				rwerror("ADJUST NUMBER OF DIRECTORIES", cmd.value);
		}

		cmd.value = cstotal.cs_nbfree - fs->fs_cstotal.cs_nbfree;
		if (cmd.value != 0) {
			if (debug)
				printf("adjnbfree by %+" PRIi64 "\n", cmd.value);
			if (bkgrdsumadj == 0 || sysctl(adjnbfree, MIBSIZE, 0, 0,
			    &cmd, sizeof cmd) == -1)
				rwerror("ADJUST NUMBER OF FREE BLOCKS", cmd.value);
		}

		cmd.value = cstotal.cs_nifree - fs->fs_cstotal.cs_nifree;
		if (cmd.value != 0) {
			if (debug)
				printf("adjnifree by %+" PRIi64 "\n", cmd.value);
			if (bkgrdsumadj == 0 || sysctl(adjnifree, MIBSIZE, 0, 0,
			    &cmd, sizeof cmd) == -1)
				rwerror("ADJUST NUMBER OF FREE INODES", cmd.value);
		}

		cmd.value = cstotal.cs_nffree - fs->fs_cstotal.cs_nffree;
		if (cmd.value != 0) {
			if (debug)
				printf("adjnffree by %+" PRIi64 "\n", cmd.value);
			if (bkgrdsumadj == 0 || sysctl(adjnffree, MIBSIZE, 0, 0,
			    &cmd, sizeof cmd) == -1)
				rwerror("ADJUST NUMBER OF FREE FRAGS", cmd.value);
		}

		cmd.value = cstotal.cs_numclusters - fs->fs_cstotal.cs_numclusters;
		if (cmd.value != 0) {
			if (debug)
				printf("adjnumclusters by %+" PRIi64 "\n", cmd.value);
			if (bkgrdsumadj == 0 || sysctl(adjnumclusters, MIBSIZE, 0, 0,
			    &cmd, sizeof cmd) == -1)
				rwerror("ADJUST NUMBER OF FREE CLUSTERS", cmd.value);
		}
	}
}

static void
check_maps(
	u_char *map1,	/* map of claimed allocations */
	u_char *map2,	/* map of determined allocations */
	int mapsize,	/* size of above two maps */
	int startvalue,	/* resource value for first element in map */
	const char *name,	/* name of resource found in maps */
	int *opcode,	/* sysctl opcode to free resource */
	int skip,	/* number of entries to skip before starting to free */
	int limit)	/* limit on number of entries to free */
{
#	define BUFSIZE 16
	char buf[BUFSIZE];
	long i, j, k, l, m, n, size;
	int astart, aend, ustart, uend;
	void (*msg)(const char *fmt, ...);

	if (bkgrdflag)
		msg = pfatal;
	else
		msg = pwarn;
	astart = ustart = aend = uend = -1;
	for (i = 0; i < mapsize; i++) {
		j = *map1++;
		k = *map2++;
		if (j == k)
			continue;
		for (m = 0, l = 1; m < CHAR_BIT; m++, l <<= 1) {
			if ((j & l) == (k & l))
				continue;
			n = startvalue + i * CHAR_BIT + m;
			if ((j & l) != 0) {
				if (astart == -1) {
					astart = aend = n;
					continue;
				}
				if (aend + 1 == n) {
					aend = n;
					continue;
				}
				if (astart == aend)
					(*msg)("ALLOCATED %s %d MARKED FREE\n",
					    name, astart);
				else
					(*msg)("%s %sS %d-%d MARKED FREE\n",
					    "ALLOCATED", name, astart, aend);
				astart = aend = n;
			} else {
				if (ustart == -1) {
					ustart = uend = n;
					continue;
				}
				if (uend + 1 == n) {
					uend = n;
					continue;
				}
				size = uend - ustart + 1;
				if (size <= skip) {
					skip -= size;
					ustart = uend = n;
					continue;
				}
				if (skip > 0) {
					ustart += skip;
					size -= skip;
					skip = 0;
				}
				if (size > limit)
					size = limit;
				if (debug && size == 1)
					pwarn("%s %s %d MARKED USED\n",
					    "UNALLOCATED", name, ustart);
				else if (debug)
					pwarn("%s %sS %d-%ld MARKED USED\n",
					    "UNALLOCATED", name, ustart,
					    ustart + size - 1);
				if (bkgrdflag != 0) {
					cmd.value = ustart;
					cmd.size = size;
					if (sysctl(opcode, MIBSIZE, 0, 0,
					    &cmd, sizeof cmd) == -1) {
						snprintf(buf, BUFSIZE,
						    "FREE %s", name);
						rwerror(buf, cmd.value);
					}
				}
				limit -= size;
				if (limit <= 0)
					return;
				ustart = uend = n;
			}
		}
	}
	if (astart != -1) {
		if (astart == aend)
			(*msg)("ALLOCATED %s %d MARKED FREE\n", name, astart);
		else
			(*msg)("ALLOCATED %sS %d-%d MARKED FREE\n",
			    name, astart, aend);
	}
	if (ustart != -1) {
		size = uend - ustart + 1;
		if (size <= skip)
			return;
		if (skip > 0) {
			ustart += skip;
			size -= skip;
		}
		if (size > limit)
			size = limit;
		if (debug) {
			if (size == 1)
				pwarn("UNALLOCATED %s %d MARKED USED\n",
				    name, ustart);
			else
				pwarn("UNALLOCATED %sS %d-%ld MARKED USED\n",
				    name, ustart, ustart + size - 1);
		}
		if (bkgrdflag != 0) {
			cmd.value = ustart;
			cmd.size = size;
			if (sysctl(opcode, MIBSIZE, 0, 0, &cmd,
			    sizeof cmd) == -1) {
				snprintf(buf, BUFSIZE, "FREE %s", name);
				rwerror(buf, cmd.value);
			}
		}
	}
}
OpenPOWER on IntegriCloud