bt_rec.c 34.1 KB
Newer Older
unknown's avatar
unknown committed
1 2 3
/*-
 * See the file LICENSE for redistribution information.
 *
unknown's avatar
unknown committed
4
 * Copyright (c) 1996-2005
unknown's avatar
unknown committed
5
 *	Sleepycat Software.  All rights reserved.
unknown's avatar
unknown committed
6
 *
unknown's avatar
unknown committed
7
 * $Id: bt_rec.c,v 12.11 2005/10/20 18:57:01 bostic Exp $
unknown's avatar
unknown committed
8 9 10 11 12 13 14 15 16 17 18
 */

#include "db_config.h"

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <string.h>
#endif

#include "db_int.h"
unknown's avatar
unknown committed
19 20 21 22 23
#include "dbinc/db_page.h"
#include "dbinc/db_shash.h"
#include "dbinc/btree.h"
#include "dbinc/lock.h"
#include "dbinc/log.h"
unknown's avatar
unknown committed
24
#include "dbinc/mp.h"
unknown's avatar
unknown committed
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

#define	IS_BTREE_PAGE(pagep)						\
	(TYPE(pagep) == P_IBTREE ||					\
	 TYPE(pagep) == P_LBTREE || TYPE(pagep) == P_LDUP)

/*
 * __bam_split_recover --
 *	Recovery function for split.
 *
 * PUBLIC: int __bam_split_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_split_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_split_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *_lp, *lp, *np, *pp, *_rp, *rp, *sp;
	db_pgno_t pgno, root_pgno;
	u_int32_t ptype;
unknown's avatar
unknown committed
52
	int cmp, l_update, p_update, r_update, rc, ret, rootsplit, t_ret;
unknown's avatar
unknown committed
53 54 55 56 57 58 59 60

	COMPQUIET(info, NULL);
	REC_PRINT(__bam_split_print);

	mpf = NULL;
	_lp = lp = np = pp = _rp = rp = NULL;
	sp = NULL;

unknown's avatar
unknown committed
61
	REC_INTRO(__bam_split_read, 1, 0);
unknown's avatar
unknown committed
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76

	/*
	 * There are two kinds of splits that we have to recover from.  The
	 * first is a root-page split, where the root page is split from a
	 * leaf page into an internal page and two new leaf pages are created.
	 * The second is where a page is split into two pages, and a new key
	 * is inserted into the parent page.
	 *
	 * DBTs are not aligned in log records, so we need to copy the page
	 * so that we can access fields within it throughout this routine.
	 * Although we could hardcode the unaligned copies in this routine,
	 * we will be calling into regular btree functions with this page,
	 * so it's got to be aligned.  Copying it into allocated memory is
	 * the only way to guarantee this.
	 */
unknown's avatar
unknown committed
77
	if ((ret = __os_malloc(dbenv, argp->pg.size, &sp)) != 0)
unknown's avatar
unknown committed
78 79 80 81 82
		goto out;
	memcpy(sp, argp->pg.data, argp->pg.size);

	pgno = PGNO(sp);
	root_pgno = argp->root_pgno;
unknown's avatar
unknown committed
83
	rootsplit = root_pgno != PGNO_INVALID;
unknown's avatar
unknown committed
84 85
	REC_FGET(mpf, argp->left, &lp, right);
right:	REC_FGET(mpf, argp->right, &rp, redo);
unknown's avatar
unknown committed
86

unknown's avatar
unknown committed
87
redo:	if (DB_REDO(op)) {
unknown's avatar
unknown committed
88 89 90 91
		l_update = r_update = p_update = 0;
		/*
		 * Decide if we need to resplit the page.
		 *
unknown's avatar
unknown committed
92 93
		 * If this is a root split, then the root has to exist unless
		 * we have truncated it due to a future deallocation.
unknown's avatar
unknown committed
94 95
		 */
		if (rootsplit) {
unknown's avatar
unknown committed
96 97 98
			REC_FGET(mpf, root_pgno, &pp, do_left);
			cmp =
			    log_compare(&LSN(pp), &LSN(argp->pg.data));
unknown's avatar
unknown committed
99
			CHECK_LSN(dbenv, op,
unknown's avatar
unknown committed
100
			    cmp, &LSN(pp), &LSN(argp->pg.data));
unknown's avatar
unknown committed
101 102 103
			p_update = cmp  == 0;
		}

unknown's avatar
unknown committed
104
do_left:	if (lp != NULL) {
unknown's avatar
unknown committed
105
			cmp = log_compare(&LSN(lp), &argp->llsn);
unknown's avatar
unknown committed
106
			CHECK_LSN(dbenv, op, cmp, &LSN(lp), &argp->llsn);
unknown's avatar
unknown committed
107 108
			if (cmp == 0)
				l_update = 1;
unknown's avatar
unknown committed
109
		}
unknown's avatar
unknown committed
110 111 112

		if (rp != NULL) {
			cmp = log_compare(&LSN(rp), &argp->rlsn);
unknown's avatar
unknown committed
113
			CHECK_LSN(dbenv, op, cmp, &LSN(rp), &argp->rlsn);
unknown's avatar
unknown committed
114 115
			if (cmp == 0)
				r_update = 1;
unknown's avatar
unknown committed
116 117
		}

unknown's avatar
unknown committed
118 119 120 121
		if (!p_update && !l_update && !r_update)
			goto check_next;

		/* Allocate and initialize new left/right child pages. */
unknown's avatar
unknown committed
122 123
		if ((ret = __os_malloc(dbenv, file_dbp->pgsize, &_lp)) != 0 ||
		    (ret = __os_malloc(dbenv, file_dbp->pgsize, &_rp)) != 0)
unknown's avatar
unknown committed
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
			goto out;
		if (rootsplit) {
			P_INIT(_lp, file_dbp->pgsize, argp->left,
			    PGNO_INVALID,
			    ISINTERNAL(sp) ? PGNO_INVALID : argp->right,
			    LEVEL(sp), TYPE(sp));
			P_INIT(_rp, file_dbp->pgsize, argp->right,
			    ISINTERNAL(sp) ?  PGNO_INVALID : argp->left,
			    PGNO_INVALID, LEVEL(sp), TYPE(sp));
		} else {
			P_INIT(_lp, file_dbp->pgsize, PGNO(sp),
			    ISINTERNAL(sp) ? PGNO_INVALID : PREV_PGNO(sp),
			    ISINTERNAL(sp) ? PGNO_INVALID : argp->right,
			    LEVEL(sp), TYPE(sp));
			P_INIT(_rp, file_dbp->pgsize, argp->right,
			    ISINTERNAL(sp) ? PGNO_INVALID : sp->pgno,
			    ISINTERNAL(sp) ? PGNO_INVALID : NEXT_PGNO(sp),
			    LEVEL(sp), TYPE(sp));
		}

		/* Split the page. */
		if ((ret = __bam_copy(file_dbp, sp, _lp, 0, argp->indx)) != 0 ||
		    (ret = __bam_copy(file_dbp, sp, _rp, argp->indx,
		    NUM_ENT(sp))) != 0)
			goto out;

		if (l_update) {
			memcpy(lp, _lp, file_dbp->pgsize);
			lp->lsn = *lsnp;
unknown's avatar
unknown committed
153
			if ((ret = __memp_fput(mpf, lp, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
154 155 156 157 158 159 160
				goto out;
			lp = NULL;
		}

		if (r_update) {
			memcpy(rp, _rp, file_dbp->pgsize);
			rp->lsn = *lsnp;
unknown's avatar
unknown committed
161
			if ((ret = __memp_fput(mpf, rp, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182
				goto out;
			rp = NULL;
		}

		/*
		 * If the parent page is wrong, update it.  This is of interest
		 * only if it was a root split, since root splits create parent
		 * pages.  All other splits modify a parent page, but those are
		 * separately logged and recovered.
		 */
		if (rootsplit && p_update) {
			if (IS_BTREE_PAGE(sp)) {
				ptype = P_IBTREE;
				rc = argp->opflags & SPL_NRECS ? 1 : 0;
			} else {
				ptype = P_IRECNO;
				rc = 1;
			}

			P_INIT(pp, file_dbp->pgsize, root_pgno,
			    PGNO_INVALID, PGNO_INVALID, _lp->level + 1, ptype);
unknown's avatar
unknown committed
183
			RE_NREC_SET(pp, rc ? __bam_total(file_dbp, _lp) +
unknown's avatar
unknown committed
184
			    __bam_total(file_dbp, _rp) : 0);
unknown's avatar
unknown committed
185 186

			pp->lsn = *lsnp;
unknown's avatar
unknown committed
187
			if ((ret = __memp_fput(mpf, pp, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
188 189 190 191 192 193 194 195 196 197 198
				goto out;
			pp = NULL;
		}

check_next:	/*
		 * Finally, redo the next-page link if necessary.  This is of
		 * interest only if it wasn't a root split -- inserting a new
		 * page in the tree requires that any following page have its
		 * previous-page pointer updated to our new page.  The next
		 * page must exist because we're redoing the operation.
		 */
unknown's avatar
unknown committed
199 200 201 202 203 204 205 206 207 208 209 210 211
		if (!rootsplit && argp->npgno != PGNO_INVALID) {
			if ((ret =
			    __memp_fget(mpf, &argp->npgno, 0, &np)) != 0) {
				if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
				    || DB_REDO(op)
#endif
				    ) {
					ret = __db_pgerr(
					    file_dbp, argp->npgno, ret);
					goto out;
				} else
					goto done;
unknown's avatar
unknown committed
212 213
			}
			cmp = log_compare(&LSN(np), &argp->nlsn);
unknown's avatar
unknown committed
214
			CHECK_LSN(dbenv, op, cmp, &LSN(np), &argp->nlsn);
unknown's avatar
unknown committed
215 216 217 218
			if (cmp == 0) {
				PREV_PGNO(np) = argp->right;
				np->lsn = *lsnp;
				if ((ret =
unknown's avatar
unknown committed
219
				    __memp_fput(mpf, np, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
220 221 222 223 224 225 226 227 228 229 230 231
					goto out;
				np = NULL;
			}
		}
	} else {
		/*
		 * If the split page is wrong, replace its contents with the
		 * logged page contents.  If the page doesn't exist, it means
		 * that the create of the page never happened, nor did any of
		 * the adds onto the page that caused the split, and there's
		 * really no undo-ing to be done.
		 */
unknown's avatar
unknown committed
232
		if ((ret = __memp_fget(mpf, &pgno, 0, &pp)) != 0) {
unknown's avatar
unknown committed
233 234 235 236 237
			pp = NULL;
			goto lrundo;
		}
		if (log_compare(lsnp, &LSN(pp)) == 0) {
			memcpy(pp, argp->pg.data, argp->pg.size);
unknown's avatar
unknown committed
238
			if ((ret = __memp_fput(mpf, pp, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
				goto out;
			pp = NULL;
		}

		/*
		 * If it's a root split and the left child ever existed, update
		 * its LSN.  (If it's not a root split, we've updated the left
		 * page already -- it's the same as the split page.) If the
		 * right child ever existed, root split or not, update its LSN.
		 * The undo of the page allocation(s) will restore them to the
		 * free list.
		 */
lrundo:		if ((rootsplit && lp != NULL) || rp != NULL) {
			if (rootsplit && lp != NULL &&
			    log_compare(lsnp, &LSN(lp)) == 0) {
				lp->lsn = argp->llsn;
				if ((ret =
unknown's avatar
unknown committed
256
				    __memp_fput(mpf, lp, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
257 258 259 260 261 262 263
					goto out;
				lp = NULL;
			}
			if (rp != NULL &&
			    log_compare(lsnp, &LSN(rp)) == 0) {
				rp->lsn = argp->rlsn;
				if ((ret =
unknown's avatar
unknown committed
264
				    __memp_fput(mpf, rp, DB_MPOOL_DIRTY)) != 0)
unknown's avatar
unknown committed
265 266 267 268 269 270 271 272 273 274 275 276 277
					goto out;
				rp = NULL;
			}
		}

		/*
		 * Finally, undo the next-page link if necessary.  This is of
		 * interest only if it wasn't a root split -- inserting a new
		 * page in the tree requires that any following page have its
		 * previous-page pointer updated to our new page.  Since it's
		 * possible that the next-page never existed, we ignore it as
		 * if there's nothing to undo.
		 */
unknown's avatar
unknown committed
278 279 280
		if (!rootsplit && argp->npgno != PGNO_INVALID) {
			if ((ret =
			    __memp_fget(mpf, &argp->npgno, 0, &np)) != 0) {
unknown's avatar
unknown committed
281 282 283 284 285 286
				np = NULL;
				goto done;
			}
			if (log_compare(lsnp, &LSN(np)) == 0) {
				PREV_PGNO(np) = argp->left;
				np->lsn = argp->nlsn;
unknown's avatar
unknown committed
287
				if (__memp_fput(mpf, np, DB_MPOOL_DIRTY))
unknown's avatar
unknown committed
288 289 290 291 292 293 294 295 296 297
					goto out;
				np = NULL;
			}
		}
	}

done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	/* Free any pages that weren't dirtied. */
unknown's avatar
unknown committed
298
	if (pp != NULL && (t_ret = __memp_fput(mpf, pp, 0)) != 0 && ret == 0)
unknown's avatar
unknown committed
299
		ret = t_ret;
unknown's avatar
unknown committed
300
	if (lp != NULL && (t_ret = __memp_fput(mpf, lp, 0)) != 0 && ret == 0)
unknown's avatar
unknown committed
301
		ret = t_ret;
unknown's avatar
unknown committed
302
	if (np != NULL && (t_ret = __memp_fput(mpf, np, 0)) != 0 && ret == 0)
unknown's avatar
unknown committed
303
		ret = t_ret;
unknown's avatar
unknown committed
304
	if (rp != NULL && (t_ret = __memp_fput(mpf, rp, 0)) != 0 && ret == 0)
unknown's avatar
unknown committed
305 306 307 308
		ret = t_ret;

	/* Free any allocated space. */
	if (_lp != NULL)
unknown's avatar
unknown committed
309
		__os_free(dbenv, _lp);
unknown's avatar
unknown committed
310
	if (_rp != NULL)
unknown's avatar
unknown committed
311
		__os_free(dbenv, _rp);
unknown's avatar
unknown committed
312
	if (sp != NULL)
unknown's avatar
unknown committed
313
		__os_free(dbenv, sp);
unknown's avatar
unknown committed
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

	REC_CLOSE;
}

/*
 * __bam_rsplit_recover --
 *	Recovery function for a reverse split.
 *
 * PUBLIC: int __bam_rsplit_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_rsplit_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_rsplit_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_LSN copy_lsn;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	db_pgno_t pgno, root_pgno;
unknown's avatar
unknown committed
340
	db_recno_t rcnt;
unknown's avatar
unknown committed
341 342
	int cmp_n, cmp_p, modified, ret;

unknown's avatar
unknown committed
343
	pagep = NULL;
unknown's avatar
unknown committed
344 345
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_rsplit_print);
unknown's avatar
unknown committed
346
	REC_INTRO(__bam_rsplit_read, 1, 1);
unknown's avatar
unknown committed
347 348 349

	/* Fix the root page. */
	pgno = root_pgno = argp->root_pgno;
unknown's avatar
unknown committed
350 351 352 353 354 355 356
	if ((ret = __memp_fget(mpf, &pgno, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, pgno, ret);
unknown's avatar
unknown committed
357
			goto out;
unknown's avatar
unknown committed
358 359
		} else
			goto do_page;
unknown's avatar
unknown committed
360
	}
unknown's avatar
unknown committed
361

unknown's avatar
unknown committed
362 363 364
	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->rootlsn);
unknown's avatar
unknown committed
365
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->rootlsn);
unknown's avatar
unknown committed
366
	if (cmp_p == 0 && DB_REDO(op)) {
unknown's avatar
unknown committed
367 368 369 370 371 372 373 374
		/*
		 * Copy the new data to the root page.  If it is not now a
		 * leaf page we need to restore the record number.  We could
		 * try to determine if C_RECNUM was set in the btree, but
		 * that's not really necessary since the field is not used
		 * otherwise.
		 */
		rcnt = RE_NREC(pagep);
unknown's avatar
unknown committed
375
		memcpy(pagep, argp->pgdbt.data, argp->pgdbt.size);
unknown's avatar
unknown committed
376 377
		if (LEVEL(pagep) > LEAFLEVEL)
			RE_NREC_SET(pagep, rcnt);
unknown's avatar
unknown committed
378 379 380 381 382 383 384 385 386 387 388 389 390 391
		pagep->pgno = root_pgno;
		pagep->lsn = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		P_INIT(pagep, file_dbp->pgsize, root_pgno,
		    argp->nrec, PGNO_INVALID, pagep->level + 1,
		    IS_BTREE_PAGE(pagep) ? P_IBTREE : P_IRECNO);
		if ((ret = __db_pitem(dbc, pagep, 0,
		    argp->rootent.size, &argp->rootent, NULL)) != 0)
			goto out;
		pagep->lsn = argp->rootlsn;
		modified = 1;
	}
unknown's avatar
unknown committed
392
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
393 394
		goto out;

unknown's avatar
unknown committed
395
do_page:
unknown's avatar
unknown committed
396 397 398 399 400
	/*
	 * Fix the page copied over the root page.  It's possible that the
	 * page never made it to disk, so if we're undo-ing and the page
	 * doesn't exist, it's okay and there's nothing further to do.
	 */
unknown's avatar
unknown committed
401 402 403 404 405 406 407 408 409
	if ((ret = __memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
			goto out;
		} else
unknown's avatar
unknown committed
410 411 412
			goto done;
	}
	modified = 0;
unknown's avatar
unknown committed
413
	(void)__ua_memcpy(&copy_lsn, &LSN(argp->pgdbt.data), sizeof(DB_LSN));
unknown's avatar
unknown committed
414 415
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &copy_lsn);
unknown's avatar
unknown committed
416
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &copy_lsn);
unknown's avatar
unknown committed
417 418 419 420 421 422 423 424 425
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		pagep->lsn = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		memcpy(pagep, argp->pgdbt.data, argp->pgdbt.size);
		modified = 1;
	}
unknown's avatar
unknown committed
426
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
427
		goto out;
unknown's avatar
unknown committed
428
	pagep = NULL;
unknown's avatar
unknown committed
429 430 431 432

done:	*lsnp = argp->prev_lsn;
	ret = 0;

unknown's avatar
unknown committed
433
out:	if (pagep != NULL)
unknown's avatar
unknown committed
434
		(void)__memp_fput(mpf, pagep, 0);
unknown's avatar
unknown committed
435
	REC_CLOSE;
unknown's avatar
unknown committed
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459
}

/*
 * __bam_adj_recover --
 *	Recovery function for adj.
 *
 * PUBLIC: int __bam_adj_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_adj_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_adj_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	int cmp_n, cmp_p, modified, ret;

unknown's avatar
unknown committed
460
	pagep = NULL;
unknown's avatar
unknown committed
461 462
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_adj_print);
unknown's avatar
unknown committed
463
	REC_INTRO(__bam_adj_read, 1, 1);
unknown's avatar
unknown committed
464 465

	/* Get the page; if it never existed and we're undoing, we're done. */
unknown's avatar
unknown committed
466 467 468 469 470 471 472 473 474
	if ((ret = __memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
			goto out;
		} else
unknown's avatar
unknown committed
475 476 477 478 479 480
			goto done;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
481
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
482 483 484 485
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		if ((ret = __bam_adjindx(dbc,
		    pagep, argp->indx, argp->indx_copy, argp->is_insert)) != 0)
unknown's avatar
unknown committed
486
			goto out;
unknown's avatar
unknown committed
487 488 489 490 491 492 493

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		if ((ret = __bam_adjindx(dbc,
		    pagep, argp->indx, argp->indx_copy, !argp->is_insert)) != 0)
unknown's avatar
unknown committed
494
			goto out;
unknown's avatar
unknown committed
495 496 497 498

		LSN(pagep) = argp->lsn;
		modified = 1;
	}
unknown's avatar
unknown committed
499
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
500
		goto out;
unknown's avatar
unknown committed
501
	pagep = NULL;
unknown's avatar
unknown committed
502 503 504 505

done:	*lsnp = argp->prev_lsn;
	ret = 0;

unknown's avatar
unknown committed
506
out:	if (pagep != NULL)
unknown's avatar
unknown committed
507
		(void)__memp_fput(mpf, pagep, 0);
unknown's avatar
unknown committed
508
	REC_CLOSE;
unknown's avatar
unknown committed
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
}

/*
 * __bam_cadjust_recover --
 *	Recovery function for the adjust of a count change in an internal
 *	page.
 *
 * PUBLIC: int __bam_cadjust_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_cadjust_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_cadjust_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	int cmp_n, cmp_p, modified, ret;

unknown's avatar
unknown committed
534
	pagep = NULL;
unknown's avatar
unknown committed
535 536
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_cadjust_print);
unknown's avatar
unknown committed
537
	REC_INTRO(__bam_cadjust_read, 1, 0);
unknown's avatar
unknown committed
538 539

	/* Get the page; if it never existed and we're undoing, we're done. */
unknown's avatar
unknown committed
540 541 542 543 544 545 546 547 548
	if ((ret = __memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
			goto out;
		} else
unknown's avatar
unknown committed
549 550 551 552 553 554
			goto done;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
555
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
556 557 558
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		if (IS_BTREE_PAGE(pagep)) {
unknown's avatar
unknown committed
559 560
			GET_BINTERNAL(file_dbp, pagep, argp->indx)->nrecs +=
			    argp->adjust;
unknown's avatar
unknown committed
561 562 563
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, argp->adjust);
		} else {
unknown's avatar
unknown committed
564 565
			GET_RINTERNAL(file_dbp, pagep, argp->indx)->nrecs +=
			    argp->adjust;
unknown's avatar
unknown committed
566 567 568 569 570 571 572 573 574
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, argp->adjust);
		}

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		if (IS_BTREE_PAGE(pagep)) {
unknown's avatar
unknown committed
575 576
			GET_BINTERNAL(file_dbp, pagep, argp->indx)->nrecs -=
			    argp->adjust;
unknown's avatar
unknown committed
577 578 579
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, -(argp->adjust));
		} else {
unknown's avatar
unknown committed
580 581
			GET_RINTERNAL(file_dbp, pagep, argp->indx)->nrecs -=
			    argp->adjust;
unknown's avatar
unknown committed
582 583 584 585 586 587
			if (argp->opflags & CAD_UPDATEROOT)
				RE_NREC_ADJ(pagep, -(argp->adjust));
		}
		LSN(pagep) = argp->lsn;
		modified = 1;
	}
unknown's avatar
unknown committed
588
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
589
		goto out;
unknown's avatar
unknown committed
590
	pagep = NULL;
unknown's avatar
unknown committed
591 592 593 594

done:	*lsnp = argp->prev_lsn;
	ret = 0;

unknown's avatar
unknown committed
595
out:	if (pagep != NULL)
unknown's avatar
unknown committed
596
		(void)__memp_fput(mpf, pagep, 0);
unknown's avatar
unknown committed
597
	REC_CLOSE;
unknown's avatar
unknown committed
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622
}

/*
 * __bam_cdel_recover --
 *	Recovery function for the intent-to-delete of a cursor record.
 *
 * PUBLIC: int __bam_cdel_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_cdel_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_cdel_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	u_int32_t indx;
	int cmp_n, cmp_p, modified, ret;

unknown's avatar
unknown committed
623
	pagep = NULL;
unknown's avatar
unknown committed
624 625
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_cdel_print);
unknown's avatar
unknown committed
626
	REC_INTRO(__bam_cdel_read, 1, 0);
unknown's avatar
unknown committed
627 628

	/* Get the page; if it never existed and we're undoing, we're done. */
unknown's avatar
unknown committed
629 630 631 632 633 634 635 636 637
	if ((ret = __memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
			goto out;
		} else
unknown's avatar
unknown committed
638 639 640 641 642 643
			goto done;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
644
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
645 646 647
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		indx = argp->indx + (TYPE(pagep) == P_LBTREE ? O_INDX : 0);
unknown's avatar
unknown committed
648
		B_DSET(GET_BKEYDATA(file_dbp, pagep, indx)->type);
unknown's avatar
unknown committed
649 650 651 652 653 654

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Need to undo update described. */
		indx = argp->indx + (TYPE(pagep) == P_LBTREE ? O_INDX : 0);
unknown's avatar
unknown committed
655
		B_DCLR(GET_BKEYDATA(file_dbp, pagep, indx)->type);
unknown's avatar
unknown committed
656

unknown's avatar
unknown committed
657 658 659
		if ((ret = __bam_ca_delete(
		    file_dbp, argp->pgno, argp->indx, 0, NULL)) != 0)
			goto out;
unknown's avatar
unknown committed
660 661 662 663

		LSN(pagep) = argp->lsn;
		modified = 1;
	}
unknown's avatar
unknown committed
664
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
665
		goto out;
unknown's avatar
unknown committed
666
	pagep = NULL;
unknown's avatar
unknown committed
667 668 669 670

done:	*lsnp = argp->prev_lsn;
	ret = 0;

unknown's avatar
unknown committed
671
out:	if (pagep != NULL)
unknown's avatar
unknown committed
672
		(void)__memp_fput(mpf, pagep, 0);
unknown's avatar
unknown committed
673
	REC_CLOSE;
unknown's avatar
unknown committed
674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700
}

/*
 * __bam_repl_recover --
 *	Recovery function for page item replacement.
 *
 * PUBLIC: int __bam_repl_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_repl_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_repl_args *argp;
	BKEYDATA *bk;
	DB *file_dbp;
	DBC *dbc;
	DBT dbt;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	int cmp_n, cmp_p, modified, ret;
	u_int8_t *p;

unknown's avatar
unknown committed
701
	pagep = NULL;
unknown's avatar
unknown committed
702 703
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_repl_print);
unknown's avatar
unknown committed
704
	REC_INTRO(__bam_repl_read, 1, 1);
unknown's avatar
unknown committed
705 706

	/* Get the page; if it never existed and we're undoing, we're done. */
unknown's avatar
unknown committed
707 708 709 710 711 712 713 714 715
	if ((ret = __memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
			goto out;
		} else
unknown's avatar
unknown committed
716 717
			goto done;
	}
unknown's avatar
unknown committed
718
	bk = GET_BKEYDATA(file_dbp, pagep, argp->indx);
unknown's avatar
unknown committed
719 720 721 722

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
723
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
724 725 726 727 728 729 730 731
	if (cmp_p == 0 && DB_REDO(op)) {
		/*
		 * Need to redo update described.
		 *
		 * Re-build the replacement item.
		 */
		memset(&dbt, 0, sizeof(dbt));
		dbt.size = argp->prefix + argp->suffix + argp->repl.size;
unknown's avatar
unknown committed
732 733
		if ((ret = __os_malloc(dbenv, dbt.size, &dbt.data)) != 0)
			goto out;
unknown's avatar
unknown committed
734 735 736 737 738 739 740 741
		p = dbt.data;
		memcpy(p, bk->data, argp->prefix);
		p += argp->prefix;
		memcpy(p, argp->repl.data, argp->repl.size);
		p += argp->repl.size;
		memcpy(p, bk->data + (bk->len - argp->suffix), argp->suffix);

		ret = __bam_ritem(dbc, pagep, argp->indx, &dbt);
unknown's avatar
unknown committed
742
		__os_free(dbenv, dbt.data);
unknown's avatar
unknown committed
743
		if (ret != 0)
unknown's avatar
unknown committed
744
			goto out;
unknown's avatar
unknown committed
745 746 747 748 749 750 751 752 753 754 755

		LSN(pagep) = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/*
		 * Need to undo update described.
		 *
		 * Re-build the original item.
		 */
		memset(&dbt, 0, sizeof(dbt));
		dbt.size = argp->prefix + argp->suffix + argp->orig.size;
unknown's avatar
unknown committed
756 757
		if ((ret = __os_malloc(dbenv, dbt.size, &dbt.data)) != 0)
			goto out;
unknown's avatar
unknown committed
758 759 760 761 762 763 764 765
		p = dbt.data;
		memcpy(p, bk->data, argp->prefix);
		p += argp->prefix;
		memcpy(p, argp->orig.data, argp->orig.size);
		p += argp->orig.size;
		memcpy(p, bk->data + (bk->len - argp->suffix), argp->suffix);

		ret = __bam_ritem(dbc, pagep, argp->indx, &dbt);
unknown's avatar
unknown committed
766
		__os_free(dbenv, dbt.data);
unknown's avatar
unknown committed
767
		if (ret != 0)
unknown's avatar
unknown committed
768
			goto out;
unknown's avatar
unknown committed
769 770 771

		/* Reset the deleted flag, if necessary. */
		if (argp->isdeleted)
unknown's avatar
unknown committed
772
			B_DSET(GET_BKEYDATA(file_dbp, pagep, argp->indx)->type);
unknown's avatar
unknown committed
773 774 775 776

		LSN(pagep) = argp->lsn;
		modified = 1;
	}
unknown's avatar
unknown committed
777
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
778
		goto out;
unknown's avatar
unknown committed
779
	pagep = NULL;
unknown's avatar
unknown committed
780 781 782 783

done:	*lsnp = argp->prev_lsn;
	ret = 0;

unknown's avatar
unknown committed
784
out:	if (pagep != NULL)
unknown's avatar
unknown committed
785
		(void)__memp_fput(mpf, pagep, 0);
unknown's avatar
unknown committed
786
	REC_CLOSE;
unknown's avatar
unknown committed
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
}

/*
 * __bam_root_recover --
 *	Recovery function for setting the root page on the meta-data page.
 *
 * PUBLIC: int __bam_root_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_root_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_root_args *argp;
	BTMETA *meta;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	int cmp_n, cmp_p, modified, ret;

unknown's avatar
unknown committed
811
	meta = NULL;
unknown's avatar
unknown committed
812 813
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_root_print);
unknown's avatar
unknown committed
814
	REC_INTRO(__bam_root_read, 0, 0);
unknown's avatar
unknown committed
815

unknown's avatar
unknown committed
816 817 818 819 820 821 822
	if ((ret = __memp_fget(mpf, &argp->meta_pgno, 0, &meta)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->meta_pgno, ret);
unknown's avatar
unknown committed
823 824 825 826 827 828 829 830
			goto out;
		} else
			goto done;
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(meta));
	cmp_p = log_compare(&LSN(meta), &argp->meta_lsn);
unknown's avatar
unknown committed
831
	CHECK_LSN(dbenv, op, cmp_p, &LSN(meta), &argp->meta_lsn);
unknown's avatar
unknown committed
832 833 834 835 836 837 838 839 840 841 842
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to redo update described. */
		meta->root = argp->root_pgno;
		meta->dbmeta.lsn = *lsnp;
		((BTREE *)file_dbp->bt_internal)->bt_root = meta->root;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Nothing to undo except lsn. */
		meta->dbmeta.lsn = argp->meta_lsn;
		modified = 1;
	}
unknown's avatar
unknown committed
843
	if ((ret = __memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)) != 0)
unknown's avatar
unknown committed
844
		goto out;
unknown's avatar
unknown committed
845
	meta = NULL;
unknown's avatar
unknown committed
846 847 848 849

done:	*lsnp = argp->prev_lsn;
	ret = 0;

unknown's avatar
unknown committed
850
out:	if (meta != NULL)
unknown's avatar
unknown committed
851
		(void)__memp_fput(mpf, meta, 0);
unknown's avatar
unknown committed
852
	REC_CLOSE;
unknown's avatar
unknown committed
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877
}

/*
 * __bam_curadj_recover --
 *	Transaction abort function to undo cursor adjustments.
 *	This should only be triggered by subtransaction aborts.
 *
 * PUBLIC: int __bam_curadj_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_curadj_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_curadj_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	int ret;

	COMPQUIET(info, NULL);
unknown's avatar
unknown committed
878
	COMPQUIET(mpf, NULL);
unknown's avatar
unknown committed
879 880

	REC_PRINT(__bam_curadj_print);
unknown's avatar
unknown committed
881
	REC_INTRO(__bam_curadj_read, 0, 1);
unknown's avatar
unknown committed
882 883 884 885 886

	ret = 0;
	if (op != DB_TXN_ABORT)
		goto done;

unknown's avatar
unknown committed
887
	switch (argp->mode) {
unknown's avatar
unknown committed
888 889 890 891 892 893 894
	case DB_CA_DI:
		if ((ret = __bam_ca_di(dbc, argp->from_pgno,
		    argp->from_indx, -(int)argp->first_indx)) != 0)
			goto out;
		break;
	case DB_CA_DUP:
		if ((ret = __bam_ca_undodup(file_dbp, argp->first_indx,
unknown's avatar
unknown committed
895
		    argp->from_pgno, argp->from_indx, argp->to_indx)) != 0)
unknown's avatar
unknown committed
896 897 898 899 900 901 902 903 904 905
			goto out;
		break;

	case DB_CA_RSPLIT:
		if ((ret =
		    __bam_ca_rsplit(dbc, argp->to_pgno, argp->from_pgno)) != 0)
			goto out;
		break;

	case DB_CA_SPLIT:
unknown's avatar
unknown committed
906 907 908
		if ((ret = __bam_ca_undosplit(file_dbp, argp->from_pgno,
		    argp->to_pgno, argp->left_pgno, argp->from_indx)) != 0)
			goto out;
unknown's avatar
unknown committed
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
		break;
	}

done:	*lsnp = argp->prev_lsn;
out:	REC_CLOSE;
}

/*
 * __bam_rcuradj_recover --
 *	Transaction abort function to undo cursor adjustments in rrecno.
 *	This should only be triggered by subtransaction aborts.
 *
 * PUBLIC: int __bam_rcuradj_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_rcuradj_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_rcuradj_args *argp;
	BTREE_CURSOR *cp;
	DB *file_dbp;
	DBC *dbc, *rdbc;
	DB_MPOOLFILE *mpf;
	int ret, t_ret;

	COMPQUIET(info, NULL);
unknown's avatar
unknown committed
940
	COMPQUIET(mpf, NULL);
unknown's avatar
unknown committed
941 942 943
	rdbc = NULL;

	REC_PRINT(__bam_rcuradj_print);
unknown's avatar
unknown committed
944
	REC_INTRO(__bam_rcuradj_read, 0, 1);
unknown's avatar
unknown committed
945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960

	ret = t_ret = 0;

	if (op != DB_TXN_ABORT)
		goto done;

	/*
	 * We don't know whether we're in an offpage dup set, and
	 * thus don't know whether the dbc REC_INTRO has handed us is
	 * of a reasonable type.  It's certainly unset, so if this is
	 * an offpage dup set, we don't have an OPD cursor.  The
	 * simplest solution is just to allocate a whole new cursor
	 * for our use;  we're only really using it to hold pass some
	 * state into __ram_ca, and this way we don't need to make
	 * this function know anything about how offpage dups work.
	 */
unknown's avatar
unknown committed
961
	if ((ret = __db_cursor_int(file_dbp,
unknown's avatar
unknown committed
962
		NULL, DB_RECNO, argp->root, 0, DB_LOCK_INVALIDID, &rdbc)) != 0)
unknown's avatar
unknown committed
963 964 965 966 967 968
		goto out;

	cp = (BTREE_CURSOR *)rdbc->internal;
	F_SET(cp, C_RENUMBER);
	cp->recno = argp->recno;

unknown's avatar
unknown committed
969
	switch (argp->mode) {
unknown's avatar
unknown committed
970 971 972 973 974 975 976 977
	case CA_DELETE:
		/*
		 * The way to undo a delete is with an insert.  Since
		 * we're undoing it, the delete flag must be set.
		 */
		F_SET(cp, C_DELETED);
		F_SET(cp, C_RENUMBER);	/* Just in case. */
		cp->order = argp->order;
unknown's avatar
unknown committed
978
		(void)__ram_ca(rdbc, CA_ICURRENT);
unknown's avatar
unknown committed
979 980 981 982 983 984 985 986 987 988
		break;
	case CA_IAFTER:
	case CA_IBEFORE:
	case CA_ICURRENT:
		/*
		 * The way to undo an insert is with a delete.  The delete
		 * flag is unset to start with.
		 */
		F_CLR(cp, C_DELETED);
		cp->order = INVALID_ORDER;
unknown's avatar
unknown committed
989
		(void)__ram_ca(rdbc, CA_DELETE);
unknown's avatar
unknown committed
990 991 992 993
		break;
	}

done:	*lsnp = argp->prev_lsn;
unknown's avatar
unknown committed
994
out:	if (rdbc != NULL && (t_ret = __db_c_close(rdbc)) != 0 && ret == 0)
unknown's avatar
unknown committed
995 996 997
		ret = t_ret;
	REC_CLOSE;
}
unknown's avatar
unknown committed
998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023

/*
 * __bam_relink_recover --
 *	Recovery function for relink.
 *
 * PUBLIC: int __bam_relink_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_relink_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_relink_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	int cmp_n, cmp_p, modified, ret;

	pagep = NULL;
	COMPQUIET(info, NULL);
	REC_PRINT(__bam_relink_print);
unknown's avatar
unknown committed
1024
	REC_INTRO(__bam_relink_read, 1, 0);
unknown's avatar
unknown committed
1025 1026 1027 1028 1029 1030 1031

	/*
	 * There are up to three pages we need to check -- the page, and the
	 * previous and next pages, if they existed.  For a page add operation,
	 * the current page is the result of a split and is being recovered
	 * elsewhere, so all we need do is recover the next page.
	 */
unknown's avatar
unknown committed
1032
	if ((ret = __memp_fget(mpf, &argp->next, 0, &pagep)) != 0) {
unknown's avatar
unknown committed
1033 1034 1035 1036 1037
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
unknown's avatar
unknown committed
1038
			ret = __db_pgerr(file_dbp, argp->next, ret);
unknown's avatar
unknown committed
1039 1040
			goto out;
		} else
unknown's avatar
unknown committed
1041
			goto prev;
unknown's avatar
unknown committed
1042
	}
unknown's avatar
unknown committed
1043

unknown's avatar
unknown committed
1044
	modified = 0;
unknown's avatar
unknown committed
1045 1046 1047 1048 1049 1050 1051 1052 1053
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn_next);
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->lsn_next);
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Redo the remove or replace. */
		if (argp->new_pgno == PGNO_INVALID)
			pagep->prev_pgno = argp->prev;
		else
			pagep->prev_pgno = argp->new_pgno;
unknown's avatar
unknown committed
1054

unknown's avatar
unknown committed
1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
		pagep->lsn = *lsnp;
		modified = 1;
	} else if (cmp_n == 0 && DB_UNDO(op)) {
		/* Undo the remove or replace. */
		pagep->prev_pgno = argp->pgno;

		pagep->lsn = argp->lsn_next;
		modified = 1;
	}

	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	pagep = NULL;

prev: if ((ret = __memp_fget(mpf, &argp->prev, 0, &pagep)) != 0) {
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
			ret = __db_pgerr(file_dbp, argp->prev, ret);
			goto out;
		} else
			goto done;
	}

	modified = 0;
	cmp_p = log_compare(&LSN(pagep), &argp->lsn_prev);
	CHECK_LSN(dbenv, op, cmp_p, &LSN(pagep), &argp->lsn_prev);
unknown's avatar
unknown committed
1084 1085
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Redo the relink. */
unknown's avatar
unknown committed
1086 1087 1088 1089 1090
		if (argp->new_pgno == PGNO_INVALID)
			pagep->next_pgno = argp->next;
		else
			pagep->next_pgno = argp->new_pgno;

unknown's avatar
unknown committed
1091 1092 1093 1094
		pagep->lsn = *lsnp;
		modified = 1;
	} else if (log_compare(lsnp, &LSN(pagep)) == 0 && DB_UNDO(op)) {
		/* Undo the relink. */
unknown's avatar
unknown committed
1095 1096
		pagep->next_pgno = argp->pgno;
		pagep->lsn = argp->lsn_prev;
unknown's avatar
unknown committed
1097 1098 1099

		modified = 1;
	}
unknown's avatar
unknown committed
1100

unknown's avatar
unknown committed
1101 1102 1103 1104
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
	pagep = NULL;

unknown's avatar
unknown committed
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
done:	*lsnp = argp->prev_lsn;
	ret = 0;

out:	if (pagep != NULL)
		(void)__memp_fput(mpf, pagep, 0);
	REC_CLOSE;
}

/*
 * __bam_merge_recover --
 *	Recovery function for merge.
 *
 * PUBLIC: int __bam_merge_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_merge_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	__bam_merge_args *argp;
	BKEYDATA *bk;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep;
	db_indx_t indx, *ninp, *pinp;
	u_int32_t size;
	u_int8_t *bp;
	int cmp_n, cmp_p, i, modified, ret;

	COMPQUIET(info, NULL);

	REC_PRINT(__bam_merge_print);
	REC_INTRO(__bam_merge_read, 1, 1);

	if ((ret = __memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
unknown's avatar
unknown committed
1145 1146 1147 1148 1149
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
unknown's avatar
unknown committed
1150
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
unknown's avatar
unknown committed
1151 1152
			goto out;
		} else
unknown's avatar
unknown committed
1153
			goto next;
unknown's avatar
unknown committed
1154 1155 1156 1157
	}

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
unknown's avatar
unknown committed
1158 1159
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
	CHECK_LSN(file_dbp->dbenv, op, cmp_p, &LSN(pagep), &argp->lsn);
unknown's avatar
unknown committed
1160

unknown's avatar
unknown committed
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
	if (cmp_p == 0 && DB_REDO(op)) {
		/*
		 * If the header is provided the page is empty, copy the
		 * needed data.
		 */
		DB_ASSERT(argp->hdr.size == 0 || NUM_ENT(pagep) == 0);
		if (argp->hdr.size != 0) {
			P_INIT(pagep, file_dbp->pgsize, pagep->pgno,
			     PREV_PGNO(argp->hdr.data),
			     NEXT_PGNO(argp->hdr.data),
			     LEVEL(argp->hdr.data), TYPE(argp->hdr.data));
		}
		if (TYPE(pagep) == P_OVERFLOW) {
			OV_REF(pagep) = OV_REF(argp->hdr.data);
			OV_LEN(pagep) = OV_LEN(argp->hdr.data);
			bp = (u_int8_t *) pagep + P_OVERHEAD(file_dbp);
			memcpy(bp, argp->data.data, argp->data.size);
		} else {
			/* Copy the data segment. */
			bp = (u_int8_t *)pagep +
			     (db_indx_t)(HOFFSET(pagep) - argp->data.size);
			memcpy(bp, argp->data.data, argp->data.size);

			/* Copy index table offset past the current entries. */
			pinp = P_INP(file_dbp, pagep) + NUM_ENT(pagep);
			ninp = argp->ind.data;
			for (i = 0;
			     i < (int)(argp->ind.size / sizeof(*ninp)); i++)
				*pinp++ = *ninp++
				      - (file_dbp->pgsize - HOFFSET(pagep));
			HOFFSET(pagep) -= argp->data.size;
			NUM_ENT(pagep) += i;
		}
		pagep->lsn = *lsnp;
unknown's avatar
unknown committed
1195
		modified = 1;
unknown's avatar
unknown committed
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236
	} else if (cmp_n == 0 && !DB_REDO(op)) {
		/*
		 * Since logging is logical at the page level
		 * we cannot just truncate the data space.  Delete
		 * the proper number of items from the logical end
		 * of the page.
		 */
		for (i = 0; i < (int)(argp->ind.size / sizeof(*ninp)); i++) {
			indx = NUM_ENT(pagep) - 1;
			if (P_INP(file_dbp, pagep)[indx] ==
			     P_INP(file_dbp, pagep)[indx - P_INDX]) {
				NUM_ENT(pagep)--;
				continue;
			}
			switch (TYPE(pagep)) {
			case P_LBTREE:
			case P_LRECNO:
			case P_LDUP:
				bk = GET_BKEYDATA(file_dbp, pagep, indx);
				size = BITEM_SIZE(bk);
				break;

			case P_IBTREE:
				size = BINTERNAL_SIZE(
				     GET_BINTERNAL(file_dbp, pagep, indx)->len);
				break;
			case P_IRECNO:
				size = RINTERNAL_SIZE;
				break;

			default:
				ret = __db_pgfmt(dbenv, PGNO(pagep));
				goto out;
			}
			if ((ret =
			     __db_ditem(dbc, pagep, indx, size)) != 0)
				goto out;
		}
		if (argp->ind.size == 0)
			HOFFSET(pagep) = file_dbp->pgsize;
		pagep->lsn = argp->lsn;
unknown's avatar
unknown committed
1237 1238
		modified = 1;
	}
unknown's avatar
unknown committed
1239

unknown's avatar
unknown committed
1240 1241 1242
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;

unknown's avatar
unknown committed
1243
next:	if ((ret = __memp_fget(mpf, &argp->npgno, 0, &pagep)) != 0) {
unknown's avatar
unknown committed
1244 1245 1246 1247 1248
		if (ret != DB_PAGE_NOTFOUND
#ifndef HAVE_FTRUNCATE
		     || DB_REDO(op)
#endif
		     ) {
unknown's avatar
unknown committed
1249
			ret = __db_pgerr(file_dbp, argp->pgno, ret);
unknown's avatar
unknown committed
1250 1251 1252 1253 1254 1255
			goto out;
		} else
			goto done;
	}

	modified = 0;
unknown's avatar
unknown committed
1256 1257 1258
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->nlsn);
	CHECK_LSN(file_dbp->dbenv, op, cmp_p, &LSN(pagep), &argp->nlsn);
unknown's avatar
unknown committed
1259

unknown's avatar
unknown committed
1260 1261 1262 1263 1264
	if (cmp_p == 0 && DB_REDO(op)) {
		/* Need to truncate the page. */
		HOFFSET(pagep) = file_dbp->pgsize;
		NUM_ENT(pagep) = 0;
		pagep->lsn = *lsnp;
unknown's avatar
unknown committed
1265
		modified = 1;
unknown's avatar
unknown committed
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
	} else if (cmp_n == 0 && !DB_REDO(op)) {
		/* Need to put the data back on the page. */
		if (TYPE(pagep) == P_OVERFLOW) {
			OV_REF(pagep) = OV_REF(argp->hdr.data);
			OV_LEN(pagep) = OV_LEN(argp->hdr.data);
			bp = (u_int8_t *) pagep + P_OVERHEAD(file_dbp);
			memcpy(bp, argp->data.data, argp->data.size);
		} else {
			bp = (u_int8_t *)pagep +
			     (db_indx_t)(HOFFSET(pagep) - argp->data.size);
			memcpy(bp, argp->data.data, argp->data.size);

			/* Copy index table. */
			pinp = P_INP(file_dbp, pagep) + NUM_ENT(pagep);
			ninp = argp->ind.data;
			for (i = 0;
			    i < (int)(argp->ind.size / sizeof(*ninp)); i++)
				*pinp++ = *ninp++;
			HOFFSET(pagep) -= argp->data.size;
			NUM_ENT(pagep) = i;
		}
		pagep->lsn = argp->nlsn;
unknown's avatar
unknown committed
1288 1289
		modified = 1;
	}
unknown's avatar
unknown committed
1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371

	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;
done:
	*lsnp = argp->prev_lsn;
	ret = 0;

out:	REC_CLOSE;
}

/*
 * __bam_pgno_recover --
 *	Recovery function for page number replacment.
 *
 * PUBLIC: int __bam_pgno_recover
 * PUBLIC:   __P((DB_ENV *, DBT *, DB_LSN *, db_recops, void *));
 */
int
__bam_pgno_recover(dbenv, dbtp, lsnp, op, info)
	DB_ENV *dbenv;
	DBT *dbtp;
	DB_LSN *lsnp;
	db_recops op;
	void *info;
{
	BINTERNAL *bi;
	__bam_pgno_args *argp;
	DB *file_dbp;
	DBC *dbc;
	DB_MPOOLFILE *mpf;
	PAGE *pagep, *npagep;
	db_pgno_t *pgnop;
	int cmp_n, cmp_p, modified, ret;

	COMPQUIET(info, NULL);

	REC_PRINT(__bam_pgno_print);
	REC_INTRO(__bam_pgno_read, 1, 0);

	REC_FGET(mpf, argp->pgno, &pagep, done);

	modified = 0;
	cmp_n = log_compare(lsnp, &LSN(pagep));
	cmp_p = log_compare(&LSN(pagep), &argp->lsn);
	CHECK_LSN(file_dbp->dbenv, op, cmp_p, &LSN(pagep), &argp->lsn);

	if ((cmp_p == 0 && DB_REDO(op)) || (cmp_n == 0 && !DB_REDO(op))) {
		switch (TYPE(pagep)) {
		case P_IBTREE:
			/*
			 * An internal record can have both a overflow
			 * and child pointer.  Fetch the page to see
			 * which it is.
			 */
			bi = GET_BINTERNAL(file_dbp, pagep, argp->indx);
			if (B_TYPE(bi->type) == B_OVERFLOW) {
				REC_FGET(mpf, argp->npgno, &npagep, out);

				if (TYPE(npagep) == P_OVERFLOW)
					pgnop =
					     &((BOVERFLOW *)(bi->data))->pgno;
				else
					pgnop = &bi->pgno;
				if ((ret = __memp_fput(mpf, npagep, 0)) != 0)
					goto out;
				break;
			}
			pgnop = &bi->pgno;
			break;
		case P_IRECNO:
			pgnop =
			     &GET_RINTERNAL(file_dbp, pagep, argp->indx)->pgno;
			break;
		default:
			pgnop =
			     &GET_BOVERFLOW(file_dbp, pagep, argp->indx)->pgno;
			break;
		}

		if (DB_REDO(op)) {
			/* Need to redo update described. */
			*pgnop = argp->npgno;
unknown's avatar
unknown committed
1372
			pagep->lsn = *lsnp;
unknown's avatar
unknown committed
1373 1374 1375 1376 1377 1378
			modified = 1;
		} else {
			*pgnop = argp->opgno;
			pagep->lsn = argp->lsn;
			modified = 1;
		}
unknown's avatar
unknown committed
1379
	}
unknown's avatar
unknown committed
1380

unknown's avatar
unknown committed
1381 1382 1383
	if ((ret = __memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
		goto out;

unknown's avatar
unknown committed
1384 1385
done:
	*lsnp = argp->prev_lsn;
unknown's avatar
unknown committed
1386 1387
	ret = 0;

unknown's avatar
unknown committed
1388
out:	REC_CLOSE;
unknown's avatar
unknown committed
1389
}