bt_rec.c
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上传日期:2022-05-23
资源大小:18897k
文件大小:24k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: bt_rec.c,v 11.57 2002/08/06 16:53:53 ubell Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <string.h>
- #endif
- #include "db_int.h"
- #include "dbinc/db_page.h"
- #include "dbinc/db_shash.h"
- #include "dbinc/btree.h"
- #include "dbinc/lock.h"
- #include "dbinc/log.h"
- #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;
- int cmp, l_update, p_update, r_update, rc, ret, ret_l, rootsplit, t_ret;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_split_print);
- mpf = NULL;
- _lp = lp = np = pp = _rp = rp = NULL;
- sp = NULL;
- REC_INTRO(__bam_split_read, 1);
- /*
- * 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.
- */
- if ((ret = __os_malloc(dbenv, argp->pg.size, &sp)) != 0)
- goto out;
- memcpy(sp, argp->pg.data, argp->pg.size);
- pgno = PGNO(sp);
- root_pgno = argp->root_pgno;
- rootsplit = root_pgno != PGNO_INVALID;
- if ((ret_l = mpf->get(mpf, &argp->left, 0, &lp)) != 0)
- lp = NULL;
- if (mpf->get(mpf, &argp->right, 0, &rp) != 0)
- rp = NULL;
- if (DB_REDO(op)) {
- l_update = r_update = p_update = 0;
- /*
- * Decide if we need to resplit the page.
- *
- * If this is a root split, then the root has to exist, it's
- * the page we're splitting and it gets modified. If this is
- * not a root split, then the left page has to exist, for the
- * same reason.
- */
- if (rootsplit) {
- if ((ret = mpf->get(mpf, &pgno, 0, &pp)) != 0) {
- __db_pgerr(file_dbp, pgno, ret);
- pp = NULL;
- goto out;
- }
- cmp = log_compare(&LSN(pp), &LSN(argp->pg.data));
- CHECK_LSN(op, cmp, &LSN(pp), &LSN(argp->pg.data));
- p_update = cmp == 0;
- } else if (lp == NULL) {
- __db_pgerr(file_dbp, argp->left, ret_l);
- goto out;
- }
- if (lp != NULL) {
- cmp = log_compare(&LSN(lp), &argp->llsn);
- CHECK_LSN(op, cmp, &LSN(lp), &argp->llsn);
- if (cmp == 0)
- l_update = 1;
- } else
- l_update = 1;
- if (rp != NULL) {
- cmp = log_compare(&LSN(rp), &argp->rlsn);
- CHECK_LSN(op, cmp, &LSN(rp), &argp->rlsn);
- if (cmp == 0)
- r_update = 1;
- } else
- r_update = 1;
- if (!p_update && !l_update && !r_update)
- goto check_next;
- /* Allocate and initialize new left/right child pages. */
- if ((ret = __os_malloc(dbenv, file_dbp->pgsize, &_lp)) != 0 ||
- (ret = __os_malloc(dbenv, file_dbp->pgsize, &_rp)) != 0)
- 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 the left child is wrong, update it. */
- if (lp == NULL && (ret = mpf->get(
- mpf, &argp->left, DB_MPOOL_CREATE, &lp)) != 0) {
- __db_pgerr(file_dbp, argp->left, ret);
- lp = NULL;
- goto out;
- }
- if (l_update) {
- memcpy(lp, _lp, file_dbp->pgsize);
- lp->lsn = *lsnp;
- if ((ret = mpf->put(mpf, lp, DB_MPOOL_DIRTY)) != 0)
- goto out;
- lp = NULL;
- }
- /* If the right child is wrong, update it. */
- if (rp == NULL && (ret = mpf->get(
- mpf, &argp->right, DB_MPOOL_CREATE, &rp)) != 0) {
- __db_pgerr(file_dbp, argp->right, ret);
- rp = NULL;
- goto out;
- }
- if (r_update) {
- memcpy(rp, _rp, file_dbp->pgsize);
- rp->lsn = *lsnp;
- if ((ret = mpf->put(mpf, rp, DB_MPOOL_DIRTY)) != 0)
- 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);
- RE_NREC_SET(pp, rc ? __bam_total(file_dbp, _lp) +
- __bam_total(file_dbp, _rp) : 0);
- pp->lsn = *lsnp;
- if ((ret = mpf->put(mpf, pp, DB_MPOOL_DIRTY)) != 0)
- 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.
- */
- if (!rootsplit && !IS_ZERO_LSN(argp->nlsn)) {
- if ((ret = mpf->get(mpf, &argp->npgno, 0, &np)) != 0) {
- __db_pgerr(file_dbp, argp->npgno, ret);
- np = NULL;
- goto out;
- }
- cmp = log_compare(&LSN(np), &argp->nlsn);
- CHECK_LSN(op, cmp, &LSN(np), &argp->nlsn);
- if (cmp == 0) {
- PREV_PGNO(np) = argp->right;
- np->lsn = *lsnp;
- if ((ret =
- mpf->put(mpf, np, DB_MPOOL_DIRTY)) != 0)
- 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.
- */
- if ((ret = mpf->get(mpf, &pgno, 0, &pp)) != 0) {
- pp = NULL;
- goto lrundo;
- }
- if (log_compare(lsnp, &LSN(pp)) == 0) {
- memcpy(pp, argp->pg.data, argp->pg.size);
- if ((ret = mpf->put(mpf, pp, DB_MPOOL_DIRTY)) != 0)
- 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 =
- mpf->put(mpf, lp, DB_MPOOL_DIRTY)) != 0)
- goto out;
- lp = NULL;
- }
- if (rp != NULL &&
- log_compare(lsnp, &LSN(rp)) == 0) {
- rp->lsn = argp->rlsn;
- if ((ret =
- mpf->put(mpf, rp, DB_MPOOL_DIRTY)) != 0)
- 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.
- */
- if (!rootsplit && !IS_ZERO_LSN(argp->nlsn)) {
- if ((ret = mpf->get(mpf, &argp->npgno, 0, &np)) != 0) {
- np = NULL;
- goto done;
- }
- if (log_compare(lsnp, &LSN(np)) == 0) {
- PREV_PGNO(np) = argp->left;
- np->lsn = argp->nlsn;
- if (mpf->put(mpf, np, DB_MPOOL_DIRTY))
- goto out;
- np = NULL;
- }
- }
- }
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: /* Free any pages that weren't dirtied. */
- if (pp != NULL && (t_ret = mpf->put(mpf, pp, 0)) != 0 && ret == 0)
- ret = t_ret;
- if (lp != NULL && (t_ret = mpf->put(mpf, lp, 0)) != 0 && ret == 0)
- ret = t_ret;
- if (np != NULL && (t_ret = mpf->put(mpf, np, 0)) != 0 && ret == 0)
- ret = t_ret;
- if (rp != NULL && (t_ret = mpf->put(mpf, rp, 0)) != 0 && ret == 0)
- ret = t_ret;
- /* Free any allocated space. */
- if (_lp != NULL)
- __os_free(dbenv, _lp);
- if (_rp != NULL)
- __os_free(dbenv, _rp);
- if (sp != NULL)
- __os_free(dbenv, sp);
- 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;
- int cmp_n, cmp_p, modified, ret;
- pagep = NULL;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_rsplit_print);
- REC_INTRO(__bam_rsplit_read, 1);
- /* Fix the root page. */
- pgno = root_pgno = argp->root_pgno;
- if ((ret = mpf->get(mpf, &pgno, 0, &pagep)) != 0) {
- /* The root page must always exist if we are going forward. */
- if (DB_REDO(op)) {
- __db_pgerr(file_dbp, pgno, ret);
- goto out;
- }
- /* This must be the root of an OPD tree. */
- DB_ASSERT(root_pgno !=
- ((BTREE *)file_dbp->bt_internal)->bt_root);
- ret = 0;
- goto do_page;
- }
- modified = 0;
- cmp_n = log_compare(lsnp, &LSN(pagep));
- cmp_p = log_compare(&LSN(pagep), &argp->rootlsn);
- CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->rootlsn);
- if (cmp_p == 0 && DB_REDO(op)) {
- /* Need to redo update described. */
- memcpy(pagep, argp->pgdbt.data, argp->pgdbt.size);
- 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;
- }
- if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- do_page:
- /*
- * 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.
- */
- if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
- if (DB_UNDO(op))
- goto done;
- __db_pgerr(file_dbp, argp->pgno, ret);
- goto out;
- }
- modified = 0;
- (void)__ua_memcpy(©_lsn, &LSN(argp->pgdbt.data), sizeof(DB_LSN));
- cmp_n = log_compare(lsnp, &LSN(pagep));
- cmp_p = log_compare(&LSN(pagep), ©_lsn);
- CHECK_LSN(op, cmp_p, &LSN(pagep), ©_lsn);
- 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;
- }
- if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- pagep = NULL;
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: if (pagep != NULL)
- (void)mpf->put(mpf, pagep, 0);
- REC_CLOSE;
- }
- /*
- * __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;
- pagep = NULL;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_adj_print);
- REC_INTRO(__bam_adj_read, 1);
- /* Get the page; if it never existed and we're undoing, we're done. */
- if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
- if (DB_UNDO(op))
- goto done;
- __db_pgerr(file_dbp, argp->pgno, ret);
- goto out;
- }
- modified = 0;
- cmp_n = log_compare(lsnp, &LSN(pagep));
- cmp_p = log_compare(&LSN(pagep), &argp->lsn);
- CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
- 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)
- goto out;
- 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)
- goto out;
- LSN(pagep) = argp->lsn;
- modified = 1;
- }
- if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- pagep = NULL;
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: if (pagep != NULL)
- (void)mpf->put(mpf, pagep, 0);
- REC_CLOSE;
- }
- /*
- * __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;
- pagep = NULL;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_cadjust_print);
- REC_INTRO(__bam_cadjust_read, 1);
- /* Get the page; if it never existed and we're undoing, we're done. */
- if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
- if (DB_UNDO(op))
- goto done;
- __db_pgerr(file_dbp, argp->pgno, ret);
- goto out;
- }
- modified = 0;
- cmp_n = log_compare(lsnp, &LSN(pagep));
- cmp_p = log_compare(&LSN(pagep), &argp->lsn);
- CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
- if (cmp_p == 0 && DB_REDO(op)) {
- /* Need to redo update described. */
- if (IS_BTREE_PAGE(pagep)) {
- GET_BINTERNAL(file_dbp, pagep, argp->indx)->nrecs +=
- argp->adjust;
- if (argp->opflags & CAD_UPDATEROOT)
- RE_NREC_ADJ(pagep, argp->adjust);
- } else {
- GET_RINTERNAL(file_dbp, pagep, argp->indx)->nrecs +=
- argp->adjust;
- 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)) {
- GET_BINTERNAL(file_dbp, pagep, argp->indx)->nrecs -=
- argp->adjust;
- if (argp->opflags & CAD_UPDATEROOT)
- RE_NREC_ADJ(pagep, -(argp->adjust));
- } else {
- GET_RINTERNAL(file_dbp, pagep, argp->indx)->nrecs -=
- argp->adjust;
- if (argp->opflags & CAD_UPDATEROOT)
- RE_NREC_ADJ(pagep, -(argp->adjust));
- }
- LSN(pagep) = argp->lsn;
- modified = 1;
- }
- if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- pagep = NULL;
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: if (pagep != NULL)
- (void)mpf->put(mpf, pagep, 0);
- REC_CLOSE;
- }
- /*
- * __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;
- pagep = NULL;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_cdel_print);
- REC_INTRO(__bam_cdel_read, 1);
- /* Get the page; if it never existed and we're undoing, we're done. */
- if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
- if (DB_UNDO(op))
- goto done;
- __db_pgerr(file_dbp, argp->pgno, ret);
- goto out;
- }
- modified = 0;
- cmp_n = log_compare(lsnp, &LSN(pagep));
- cmp_p = log_compare(&LSN(pagep), &argp->lsn);
- CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
- if (cmp_p == 0 && DB_REDO(op)) {
- /* Need to redo update described. */
- indx = argp->indx + (TYPE(pagep) == P_LBTREE ? O_INDX : 0);
- B_DSET(GET_BKEYDATA(file_dbp, pagep, indx)->type);
- 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);
- B_DCLR(GET_BKEYDATA(file_dbp, pagep, indx)->type);
- (void)__bam_ca_delete(file_dbp, argp->pgno, argp->indx, 0);
- LSN(pagep) = argp->lsn;
- modified = 1;
- }
- if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- pagep = NULL;
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: if (pagep != NULL)
- (void)mpf->put(mpf, pagep, 0);
- REC_CLOSE;
- }
- /*
- * __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;
- pagep = NULL;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_repl_print);
- REC_INTRO(__bam_repl_read, 1);
- /* Get the page; if it never existed and we're undoing, we're done. */
- if ((ret = mpf->get(mpf, &argp->pgno, 0, &pagep)) != 0) {
- if (DB_UNDO(op))
- goto done;
- __db_pgerr(file_dbp, argp->pgno, ret);
- goto out;
- }
- bk = GET_BKEYDATA(file_dbp, pagep, argp->indx);
- modified = 0;
- cmp_n = log_compare(lsnp, &LSN(pagep));
- cmp_p = log_compare(&LSN(pagep), &argp->lsn);
- CHECK_LSN(op, cmp_p, &LSN(pagep), &argp->lsn);
- 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;
- if ((ret = __os_malloc(dbenv, dbt.size, &dbt.data)) != 0)
- goto out;
- 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);
- __os_free(dbenv, dbt.data);
- if (ret != 0)
- goto out;
- 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;
- if ((ret = __os_malloc(dbenv, dbt.size, &dbt.data)) != 0)
- goto out;
- 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);
- __os_free(dbenv, dbt.data);
- if (ret != 0)
- goto out;
- /* Reset the deleted flag, if necessary. */
- if (argp->isdeleted)
- B_DSET(GET_BKEYDATA(file_dbp, pagep, argp->indx)->type);
- LSN(pagep) = argp->lsn;
- modified = 1;
- }
- if ((ret = mpf->put(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- pagep = NULL;
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: if (pagep != NULL)
- (void)mpf->put(mpf, pagep, 0);
- REC_CLOSE;
- }
- /*
- * __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;
- meta = NULL;
- COMPQUIET(info, NULL);
- REC_PRINT(__bam_root_print);
- REC_INTRO(__bam_root_read, 0);
- if ((ret = mpf->get(mpf, &argp->meta_pgno, 0, &meta)) != 0) {
- /* The metadata page must always exist on redo. */
- if (DB_REDO(op)) {
- __db_pgerr(file_dbp, argp->meta_pgno, ret);
- goto out;
- } else
- goto done;
- }
- modified = 0;
- cmp_n = log_compare(lsnp, &LSN(meta));
- cmp_p = log_compare(&LSN(meta), &argp->meta_lsn);
- CHECK_LSN(op, cmp_p, &LSN(meta), &argp->meta_lsn);
- 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;
- }
- if ((ret = mpf->put(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)) != 0)
- goto out;
- meta = NULL;
- done: *lsnp = argp->prev_lsn;
- ret = 0;
- out: if (meta != NULL)
- (void)mpf->put(mpf, meta, 0);
- REC_CLOSE;
- }
- /*
- * __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);
- REC_PRINT(__bam_curadj_print);
- REC_INTRO(__bam_curadj_read, 0);
- ret = 0;
- if (op != DB_TXN_ABORT)
- goto done;
- switch(argp->mode) {
- 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,
- argp->from_pgno, argp->from_indx, argp->to_indx)) != 0)
- 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:
- __bam_ca_undosplit(file_dbp, argp->from_pgno,
- argp->to_pgno, argp->left_pgno, argp->from_indx);
- 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);
- rdbc = NULL;
- REC_PRINT(__bam_rcuradj_print);
- REC_INTRO(__bam_rcuradj_read, 0);
- 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.
- */
- if ((ret =
- __db_icursor(file_dbp,
- NULL, DB_RECNO, argp->root, 0, DB_LOCK_INVALIDID, &rdbc)) != 0)
- goto out;
- cp = (BTREE_CURSOR *)rdbc->internal;
- F_SET(cp, C_RENUMBER);
- cp->recno = argp->recno;
- switch(argp->mode) {
- 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;
- __ram_ca(rdbc, CA_ICURRENT);
- 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;
- __ram_ca(rdbc, CA_DELETE);
- break;
- }
- done: *lsnp = argp->prev_lsn;
- out: if (rdbc != NULL && (t_ret = rdbc->c_close(rdbc)) != 0 && ret == 0)
- ret = t_ret;
- REC_CLOSE;
- }