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extra-dependencies/debian/htdig/htdig-3.2.0b6/db/bt_rec.c

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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998, 1999
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char sccsid[] = "@(#)bt_rec.c 11.5 (Sleepycat) 11/10/99";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <string.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "hash.h"
#include "btree.h"
#include "log.h"
/*
* CDB___bam_pg_alloc_recover --
* Recovery function for pg_alloc.
*
* PUBLIC: int CDB___bam_pg_alloc_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_pg_alloc_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__bam_pg_alloc_args *argp;
DB *file_dbp;
DBC *dbc;
DBMETA *meta;
DB_MPOOLFILE *mpf;
PAGE *pagep;
db_pgno_t pgno;
int cmp_n, cmp_p, modified, ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_pg_alloc_print);
REC_INTRO(CDB___bam_pg_alloc_read, 0);
/*
* Fix up the allocated page. If we're redoing the operation, we have
* to get the page (creating it if it doesn't exist), and update its
* LSN. If we're undoing the operation, we have to reset the page's
* LSN and put it on the free list.
*
* Fix up the metadata page. If we're redoing the operation, we have
* to get the metadata page and update its LSN and its free pointer.
* If we're undoing the operation and the page was ever created, we put
* it on the freelist.
*/
pgno = PGNO_BASE_MD;
if ((ret = CDB_memp_fget(mpf, &pgno, 0, &meta)) != 0) {
/* The metadata page must always exist on redo. */
if (redo) {
(void)CDB___db_pgerr(file_dbp, pgno);
goto out;
} else
goto done;
}
if ((ret = CDB_memp_fget(mpf, &argp->pgno, DB_MPOOL_CREATE, &pagep)) != 0) {
/*
* We specify creation and check for it later, because this
* operation was supposed to create the page, and even in
* the undo case it's going to get linked onto the freelist
* which we're also fixing up.
*/
(void)CDB___db_pgerr(file_dbp, argp->pgno);
(void)CDB_memp_fput(mpf, meta, 0);
goto out;
}
/* Fix up the allocated page. */
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &argp->page_lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
P_INIT(pagep, file_dbp->pgsize,
argp->pgno, PGNO_INVALID, PGNO_INVALID, 0, argp->ptype);
pagep->lsn = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
P_INIT(pagep, file_dbp->pgsize,
argp->pgno, PGNO_INVALID, meta->free, 0, P_INVALID);
pagep->lsn = argp->page_lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0) {
(void)CDB_memp_fput(mpf, meta, 0);
goto out;
}
/* Fix up the metadata page. */
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(meta));
cmp_p = CDB_log_compare(&LSN(meta), &argp->meta_lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
meta->lsn = *lsnp;
meta->free = argp->next;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
meta->lsn = argp->meta_lsn;
meta->free = argp->pgno;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
/*
* CDB___bam_pg_free_recover --
* Recovery function for pg_free.
*
* PUBLIC: int CDB___bam_pg_free_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_pg_free_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__bam_pg_free_args *argp;
DB *file_dbp;
DBC *dbc;
DBMETA *meta;
DB_LSN copy_lsn;
DB_MPOOLFILE *mpf;
PAGE *pagep;
db_pgno_t pgno;
int cmp_n, cmp_p, modified, ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_pg_free_print);
REC_INTRO(CDB___bam_pg_free_read, 1);
/*
* Fix up the freed page. If we're redoing the operation we get the
* page and explicitly discard its contents, then update its LSN. If
* we're undoing the operation, we get the page and restore its header.
*/
if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
/*
* We don't automatically create the page. The only way the
* page might not exist is if the alloc never happened, and
* the only way the alloc might never have happened is if we
* are undoing, in which case there's no reason to create the
* page.
*/
if (!redo)
goto done;
(void)CDB___db_pgerr(file_dbp, argp->pgno);
goto out;
}
modified = 0;
CDB___ua_memcpy(&copy_lsn, &LSN(argp->header.data), sizeof(DB_LSN));
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &copy_lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
P_INIT(pagep, file_dbp->pgsize,
pagep->pgno, PGNO_INVALID, argp->next, 0, P_INVALID);
pagep->lsn = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
memcpy(pagep, argp->header.data, argp->header.size);
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
/*
* Fix up the metadata page. If we're redoing or undoing the operation
* we get the page and update its LSN and free pointer.
*/
pgno = PGNO_BASE_MD;
if ((ret = CDB_memp_fget(mpf, &pgno, 0, &meta)) != 0) {
/* The metadata page must always exist. */
(void)CDB___db_pgerr(file_dbp, pgno);
goto out;
}
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(meta));
cmp_p = CDB_log_compare(&LSN(meta), &argp->meta_lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
meta->free = argp->pgno;
meta->lsn = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
meta->free = argp->next;
meta->lsn = argp->meta_lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
/*
* CDB___bam_split_recover --
* Recovery function for split.
*
* PUBLIC: int CDB___bam_split_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_split_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
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;
int l_update, p_update, r_update, ret, rootsplit, t_ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_split_print);
mpf = NULL;
_lp = lp = np = pp = _rp = rp = NULL;
sp = NULL;
REC_INTRO(CDB___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 = CDB___os_malloc(argp->pg.size, NULL, &sp)) != 0)
goto out;
memcpy(sp, argp->pg.data, argp->pg.size);
pgno = PGNO(sp);
root_pgno = ((BTREE *)file_dbp->bt_internal)->bt_root;
rootsplit = pgno == root_pgno;
if (CDB_memp_fget(mpf, &argp->left, 0, &lp) != 0)
lp = NULL;
if (CDB_memp_fget(mpf, &argp->right, 0, &rp) != 0)
rp = NULL;
if (redo) {
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 = CDB_memp_fget(mpf, &pgno, 0, &pp)) != 0) {
(void)CDB___db_pgerr(file_dbp, pgno);
pp = NULL;
goto out;
}
p_update =
CDB_log_compare(&LSN(pp), &LSN(argp->pg.data)) == 0;
} else
if (lp == NULL) {
(void)CDB___db_pgerr(file_dbp, argp->left);
goto out;
}
if (lp == NULL || CDB_log_compare(&LSN(lp), &argp->llsn) == 0)
l_update = 1;
if (rp == NULL || CDB_log_compare(&LSN(rp), &argp->rlsn) == 0)
r_update = 1;
if (!p_update && !l_update && !r_update)
goto done;
/* Allocate and initialize new left/right child pages. */
if ((ret = CDB___os_malloc(file_dbp->pgsize, NULL, &_lp)) != 0 ||
(ret = CDB___os_malloc(file_dbp->pgsize, NULL, &_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 = CDB___bam_copy(file_dbp, sp, _lp, 0, argp->indx)) != 0 ||
(ret = CDB___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 =
CDB_memp_fget(mpf, &argp->left, DB_MPOOL_CREATE, &lp)) != 0) {
(void)CDB___db_pgerr(file_dbp, argp->left);
lp = NULL;
goto out;
}
if (l_update) {
memcpy(lp, _lp, file_dbp->pgsize);
lp->lsn = *lsnp;
if ((ret = CDB_memp_fput(mpf, lp, DB_MPOOL_DIRTY)) != 0)
goto out;
lp = NULL;
}
/* If the right child is wrong, update it. */
if (rp == NULL && (ret = CDB_memp_fget(mpf,
&argp->right, DB_MPOOL_CREATE, &rp)) != 0) {
(void)CDB___db_pgerr(file_dbp, argp->right);
rp = NULL;
goto out;
}
if (r_update) {
memcpy(rp, _rp, file_dbp->pgsize);
rp->lsn = *lsnp;
if ((ret = CDB_memp_fput(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 (file_dbp->type == DB_BTREE)
P_INIT(pp, file_dbp->pgsize,
root_pgno, PGNO_INVALID, PGNO_INVALID,
_lp->level + 1, P_IBTREE);
else
P_INIT(pp, file_dbp->pgsize,
root_pgno, PGNO_INVALID, PGNO_INVALID,
_lp->level + 1, P_IRECNO);
RE_NREC_SET(pp,
file_dbp->type == DB_RECNO ||
F_ISSET(file_dbp, DB_BT_RECNUM) ?
CDB___bam_total(_lp) + CDB___bam_total(_rp) : 0);
pp->lsn = *lsnp;
if ((ret = CDB_memp_fput(mpf, pp, DB_MPOOL_DIRTY)) != 0)
goto out;
pp = NULL;
}
/*
* 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 = CDB_memp_fget(mpf, &argp->npgno, 0, &np)) != 0) {
(void)CDB___db_pgerr(file_dbp, argp->npgno);
np = NULL;
goto out;
}
if (CDB_log_compare(&LSN(np), &argp->nlsn) == 0) {
PREV_PGNO(np) = argp->right;
np->lsn = *lsnp;
if ((ret =
CDB_memp_fput(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 = CDB_memp_fget(mpf, &pgno, 0, &pp)) != 0) {
pp = NULL;
goto lrundo;
}
if (CDB_log_compare(lsnp, &LSN(pp)) == 0) {
memcpy(pp, argp->pg.data, argp->pg.size);
if ((ret = CDB_memp_fput(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 &&
CDB_log_compare(lsnp, &LSN(lp)) == 0) {
lp->lsn = argp->llsn;
if ((ret =
CDB_memp_fput(mpf, lp, DB_MPOOL_DIRTY)) != 0)
goto out;
lp = NULL;
}
if (rp != NULL &&
CDB_log_compare(lsnp, &LSN(rp)) == 0) {
rp->lsn = argp->rlsn;
if ((ret =
CDB_memp_fput(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 = CDB_memp_fget(mpf, &argp->npgno, 0, &np)) != 0) {
np = NULL;
goto done;
}
if (CDB_log_compare(lsnp, &LSN(np)) == 0) {
PREV_PGNO(np) = argp->left;
np->lsn = argp->nlsn;
if (CDB_memp_fput(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 = CDB_memp_fput(mpf, pp, 0)) != 0 && ret == 0)
ret = t_ret;
if (lp != NULL && (t_ret = CDB_memp_fput(mpf, lp, 0)) != 0 && ret == 0)
ret = t_ret;
if (np != NULL && (t_ret = CDB_memp_fput(mpf, np, 0)) != 0 && ret == 0)
ret = t_ret;
if (rp != NULL && (t_ret = CDB_memp_fput(mpf, rp, 0)) != 0 && ret == 0)
ret = t_ret;
/* Free any allocated space. */
if (_lp != NULL)
CDB___os_free(_lp, file_dbp->pgsize);
if (_rp != NULL)
CDB___os_free(_rp, file_dbp->pgsize);
if (sp != NULL)
CDB___os_free(sp, argp->pg.size);
REC_CLOSE;
}
/*
* CDB___bam_rsplit_recover --
* Recovery function for a reverse split.
*
* PUBLIC: int CDB___bam_rsplit_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_rsplit_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
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;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_rsplit_print);
REC_INTRO(CDB___bam_rsplit_read, 1);
/* Fix the root page. */
pgno = root_pgno = ((BTREE *)file_dbp->bt_internal)->bt_root;
if ((ret = CDB_memp_fget(mpf, &pgno, 0, &pagep)) != 0) {
/* The root page must always exist. */
CDB___db_pgerr(file_dbp, pgno);
goto out;
}
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &argp->rootlsn);
if (cmp_p == 0 && redo) {
/* 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 && !redo) {
/* Need to undo update described. */
P_INIT(pagep, file_dbp->pgsize, root_pgno,
argp->nrec, PGNO_INVALID, pagep->level + 1,
file_dbp->type == DB_BTREE ? P_IBTREE : P_IRECNO);
if ((ret = CDB___db_pitem(dbc, pagep, 0,
argp->rootent.size, &argp->rootent, NULL)) != 0)
goto out;
pagep->lsn = argp->rootlsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
/*
* 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 = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo)
goto done;
(void)CDB___db_pgerr(file_dbp, argp->pgno);
goto out;
}
modified = 0;
CDB___ua_memcpy(&copy_lsn, &LSN(argp->pgdbt.data), sizeof(DB_LSN));
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &copy_lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
pagep->lsn = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
memcpy(pagep, argp->pgdbt.data, argp->pgdbt.size);
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
/*
* CDB___bam_adj_recover --
* Recovery function for adj.
*
* PUBLIC: int CDB___bam_adj_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_adj_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__bam_adj_args *argp;
DB *file_dbp;
DBC *dbc;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int cmp_n, cmp_p, modified, ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_adj_print);
REC_INTRO(CDB___bam_adj_read, 1);
/* Get the page; if it never existed and we're undoing, we're done. */
if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo)
goto done;
(void)CDB___db_pgerr(file_dbp, argp->pgno);
goto out;
}
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &argp->lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
if ((ret = CDB___bam_adjindx(dbc,
pagep, argp->indx, argp->indx_copy, argp->is_insert)) != 0)
goto err;
LSN(pagep) = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
if ((ret = CDB___bam_adjindx(dbc,
pagep, argp->indx, argp->indx_copy, !argp->is_insert)) != 0)
goto err;
LSN(pagep) = argp->lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
if (0) {
err: (void)CDB_memp_fput(mpf, pagep, 0);
}
out: REC_CLOSE;
}
/*
* CDB___bam_cadjust_recover --
* Recovery function for the adjust of a count change in an internal
* page.
*
* PUBLIC: int CDB___bam_cadjust_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_cadjust_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__bam_cadjust_args *argp;
DB *file_dbp;
DBC *dbc;
DB_MPOOLFILE *mpf;
PAGE *pagep;
db_pgno_t root_pgno;
int cmp_n, cmp_p, modified, ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_cadjust_print);
REC_INTRO(CDB___bam_cadjust_read, 1);
/* Get the page; if it never existed and we're undoing, we're done. */
if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo)
goto done;
(void)CDB___db_pgerr(file_dbp, argp->pgno);
goto out;
}
modified = 0;
root_pgno = ((BTREE *)file_dbp->bt_internal)->bt_root;
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &argp->lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
if (file_dbp->type == DB_BTREE &&
F_ISSET(file_dbp, DB_BT_RECNUM)) {
GET_BINTERNAL(pagep, argp->indx)->nrecs += argp->adjust;
if (argp->total && PGNO(pagep) == root_pgno)
RE_NREC_ADJ(pagep, argp->adjust);
}
if (file_dbp->type == DB_RECNO) {
GET_RINTERNAL(pagep, argp->indx)->nrecs += argp->adjust;
if (argp->total && PGNO(pagep) == root_pgno)
RE_NREC_ADJ(pagep, argp->adjust);
}
LSN(pagep) = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
if (file_dbp->type == DB_BTREE &&
F_ISSET(file_dbp, DB_BT_RECNUM)) {
GET_BINTERNAL(pagep, argp->indx)->nrecs -= argp->adjust;
if (argp->total && PGNO(pagep) == root_pgno)
RE_NREC_ADJ(pagep, argp->adjust);
}
if (file_dbp->type == DB_RECNO) {
GET_RINTERNAL(pagep, argp->indx)->nrecs -= argp->adjust;
if (argp->total && PGNO(pagep) == root_pgno)
RE_NREC_ADJ(pagep, -(argp->adjust));
}
LSN(pagep) = argp->lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
/*
* CDB___bam_cdel_recover --
* Recovery function for the intent-to-delete of a cursor record.
*
* PUBLIC: int CDB___bam_cdel_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_cdel_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__bam_cdel_args *argp;
DB *file_dbp;
DBC *dbc;
DB_MPOOLFILE *mpf;
PAGE *pagep;
int cmp_n, cmp_p, modified, ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_cdel_print);
REC_INTRO(CDB___bam_cdel_read, 1);
/* Get the page; if it never existed and we're undoing, we're done. */
if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo)
goto done;
(void)CDB___db_pgerr(file_dbp, argp->pgno);
goto out;
}
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &argp->lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
if (pagep->type == P_DUPLICATE)
B_DSET(GET_BKEYDATA(pagep, argp->indx)->type);
else
B_DSET(GET_BKEYDATA(pagep, argp->indx + O_INDX)->type);
LSN(pagep) = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Need to undo update described. */
if (pagep->type == P_DUPLICATE)
B_DCLR(GET_BKEYDATA(pagep, argp->indx)->type);
else
B_DCLR(GET_BKEYDATA(pagep, argp->indx + O_INDX)->type);
LSN(pagep) = argp->lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
/*
* CDB___bam_repl_recover --
* Recovery function for page item replacement.
*
* PUBLIC: int CDB___bam_repl_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_repl_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
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;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_repl_print);
REC_INTRO(CDB___bam_repl_read, 1);
/* Get the page; if it never existed and we're undoing, we're done. */
if ((ret = CDB_memp_fget(mpf, &argp->pgno, 0, &pagep)) != 0) {
if (!redo)
goto done;
(void)CDB___db_pgerr(file_dbp, argp->pgno);
goto out;
}
bk = GET_BKEYDATA(pagep, argp->indx);
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(pagep));
cmp_p = CDB_log_compare(&LSN(pagep), &argp->lsn);
if (cmp_p == 0 && redo) {
/*
* 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 = CDB___os_malloc(dbt.size, NULL, &dbt.data)) != 0)
goto err;
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 = CDB___bam_ritem(dbc, pagep, argp->indx, &dbt);
CDB___os_free(dbt.data, dbt.size);
if (ret != 0)
goto err;
LSN(pagep) = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/*
* 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 = CDB___os_malloc(dbt.size, NULL, &dbt.data)) != 0)
goto err;
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 = CDB___bam_ritem(dbc, pagep, argp->indx, &dbt);
CDB___os_free(dbt.data, dbt.size);
if (ret != 0)
goto err;
/* Reset the deleted flag, if necessary. */
if (argp->isdeleted)
B_DSET(GET_BKEYDATA(pagep, argp->indx)->type);
LSN(pagep) = argp->lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, pagep, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
if (0) {
err: (void)CDB_memp_fput(mpf, pagep, 0);
}
out: REC_CLOSE;
}
/*
* CDB___bam_root_recover --
* Recovery function for setting the root page on the meta-data page.
*
* PUBLIC: int CDB___bam_root_recover
* PUBLIC: __P((DB_ENV *, DBT *, DB_LSN *, int, void *));
*/
int
CDB___bam_root_recover(dbenv, dbtp, lsnp, redo, info)
DB_ENV *dbenv;
DBT *dbtp;
DB_LSN *lsnp;
int redo;
void *info;
{
__bam_root_args *argp;
BTMETA *meta;
DB *file_dbp;
DBC *dbc;
DB_MPOOLFILE *mpf;
int cmp_n, cmp_p, modified, ret;
COMPQUIET(info, NULL);
REC_PRINT(CDB___bam_root_print);
REC_INTRO(CDB___bam_root_read, 0);
if ((ret = CDB_memp_fget(mpf, &argp->meta_pgno, 0, &meta)) != 0) {
/* The metadata page must always exist on redo. */
if (redo) {
(void)CDB___db_pgerr(file_dbp, argp->meta_pgno);
goto out;
} else
goto done;
}
modified = 0;
cmp_n = CDB_log_compare(lsnp, &LSN(meta));
cmp_p = CDB_log_compare(&LSN(meta), &argp->meta_lsn);
if (cmp_p == 0 && redo) {
/* Need to redo update described. */
meta->root = argp->root_pgno;
meta->dbmeta.lsn = *lsnp;
modified = 1;
} else if (cmp_n == 0 && !redo) {
/* Nothing to undo except lsn. */
meta->dbmeta.lsn = argp->meta_lsn;
modified = 1;
}
if ((ret = CDB_memp_fput(mpf, meta, modified ? DB_MPOOL_DIRTY : 0)) != 0)
goto out;
done: *lsnp = argp->prev_lsn;
ret = 0;
out: REC_CLOSE;
}
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