mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-14 23:30:06 +00:00
bf7997b65c
1998-06-09 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/netinet/ip.h (struct ip_options): Define __data member only for gcc. Reported by ak@muc.de. * misc/mntent.h: Undo last patch. * sysdeps/unix/sysv/linux/fstatvfs.c (fstatvfs): Undo last patch. * misc/tst/mntent.c: Adjust code for this change. * io/fts.c: Updated from a slightly more recent BSD version. * io/fts.h: Likewise. * libc.map: Add __libc_stack_end. * db2/Makefile (routines): Add lock_region. * db2/config.h: Update from db-2.4.14. * db2/db.h: Likewise. * db2/db_185.h: Likewise. * db2/db_int.h: Likewise. * db2/bt_close.c: Likewise. * db2/bt_compare.c: Likewise. * db2/bt_conv.c: Likewise. * db2/bt_cursor.c: Likewise. * db2/bt_delete.c: Likewise. * db2/bt_open.c: Likewise. * db2/bt_page.c: Likewise. * db2/bt_put.c: Likewise. * db2/bt_rec.c: Likewise. * db2/bt_recno.c: Likewise. * db2/bt_rsearch.c: Likewise. * db2/bt_search.c: Likewise. * db2/bt_split.c: Likewise. * db2/bt_stat.c: Likewise. * db2/btree.src: Likewise. * db2/btree_auto.c: Likewise. * db2/getlong.c: Likewise. * db2/db_appinit.c: Likewise. * db2/db_apprec.c: Likewise. * db2/db_byteorder.c: Likewise. * db2/db_err.c: Likewise. * db2/db_log2.c: Likewise. * db2/db_region.c: Likewise. * db2/db_salloc.c: Likewise. * db2/db_shash.c: Likewise. * db2/db.c: Likewise. * db2/db.src: Likewise. * db2/db_auto.c: Likewise. * db2/db_conv.c: Likewise. * db2/db_dispatch.c: Likewise. * db2/db_dup.c: Likewise. * db2/db_overflow.c: Likewise. * db2/db_pr.c: Likewise. * db2/db_rec.c: Likewise. * db2/db_ret.c: Likewise. * db2/db_thread.c: Likewise. * db2/db185.c: Likewise. * db2/db185_int.h: Likewise. * db2/dbm.c: Likewise. * db2/hash.c: Likewise. * db2/hash.src: Likewise. * db2/hash_auto.c: Likewise. * db2/hash_conv.c: Likewise. * db2/hash_debug.c: Likewise. * db2/hash_dup.c: Likewise. * db2/hash_func.c: Likewise. * db2/hash_page.c: Likewise. * db2/hash_rec.c: Likewise. * db2/hash_stat.c: Likewise. * db2/btree.h: Likewise. * db2/btree_ext.h: Likewise. * db2/clib_ext.h: Likewise. * db2/common_ext.h: Likewise. * db2/cxx_int.h: Likewise. * db2/db.h.src: Likewise. * db2/db_185.h.src: Likewise. * db2/db_am.h: Likewise. * db2/db_auto.h: Likewise. * db2/db_cxx.h: Likewise. * db2/db_dispatch.h: Likewise. * db2/db_ext.h: Likewise. * db2/db_int.h.src: Likewise. * db2/db_page.h: Likewise. * db2/db_shash.h: Likewise. * db2/db_swap.h: Likewise. * db2/hash.h: Likewise. * db2/hash_ext.h: Likewise. * db2/lock.h: Likewise. * db2/lock_ext.h: Likewise. * db2/log.h: Likewise. * db2/log_ext.h: Likewise. * db2/mp.h: Likewise. * db2/mp_ext.h: Likewise. * db2/mutex_ext.h: Likewise. * db2/os_ext.h: Likewise. * db2/os_func.h: Likewise. * db2/queue.h: Likewise. * db2/shqueue.h: Likewise. * db2/txn.h: Likewise. * db2/lock.c: Likewise. * db2/lock_conflict.c: Likewise. * db2/lock_deadlock.c: Likewise. * db2/lock_region.c: Likewise. * db2/lock_util.c: Likewise. * db2/log.c: Likewise. * db2/log.src: Likewise. * db2/log_archive.c: Likewise. * db2/log_auto.c: Likewise. * db2/log_compare.c: Likewise. * db2/log_findckp.c: Likewise. * db2/log_get.c: Likewise. * db2/log_put.c: Likewise. * db2/log_rec.c: Likewise. * db2/log_register.c: Likewise. * db2/mp_bh.c: Likewise. * db2/mp_fget.c: Likewise. * db2/mp_fopen.c: Likewise. * db2/mp_fput.c: Likewise. * db2/mp_fset.c: Likewise. * db2/mp_open.c: Likewise. * db2/mp_pr.c: Likewise. * db2/mp_region.c: Likewise. * db2/mp_sync.c: Likewise. * db2/68020.gcc: Likewise. * db2/mutex.c: Likewise. * db2/parisc.gcc: Likewise. * db2/parisc.hp: Likewise. * db2/sco.cc: Likewise. * db2/os_abs.c: Likewise. * db2/os_alloc.c: Likewise. * db2/os_config.c: Likewise. * db2/os_dir.c: Likewise. * db2/os_fid.c: Likewise. * db2/os_fsync.c: Likewise. * db2/os_map.c: Likewise. * db2/os_oflags.c: Likewise. * db2/os_open.c: Likewise. * db2/os_rpath.c: Likewise. * db2/os_rw.c: Likewise. * db2/os_seek.c: Likewise. * db2/os_sleep.c: Likewise. * db2/os_spin.c: Likewise. * db2/os_stat.c: Likewise. * db2/os_unlink.c: Likewise. * db2/db_archive.c: Likewise. * db2/db_checkpoint.c: Likewise. * db2/db_deadlock.c: Likewise. * db2/db_dump.c: Likewise. * db2/db_dump185.c: Likewise. * db2/db_load.c: Likewise. * db2/db_printlog.c: Likewise. * db2/db_recover.c: Likewise. * db2/db_stat.c: Likewise. * db2/txn.c: Likewise. * db2/txn.src: Likewise. * db2/txn_auto.c: Likewise. * db2/txn_rec.c: Likewise. * elf/rtld.c: Move definition of __libc_stack_end to ... * sysdeps/generic/dl-sysdep.h: ...here. * sysdeps/unix/sysv/linux/fstatvfs.c: Handle nodiratime option. * sysdeps/unix/sysv/linux/bits/statvfs.h: Define ST_NODIRATIME. * sysdeps/unix/sysv/linux/sys/mount.h: Define MS_NODIRATIME. 1998-06-08 21:44 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/fstatvfs.c: Handle constant option string from mntent correctly. 1998-06-06 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sunrpc/Makefile (generated): Correct typo. 1998-06-04 Philip Blundell <philb@gnu.org> * elf/elf.h (EM_ARM, et al.): New definitions. * sysdeps/arm/dl-machine.h: Update for new draft ARM ELF ABI.
585 lines
14 KiB
C
585 lines
14 KiB
C
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1996, 1997, 1998
|
|
* Sleepycat Software. All rights reserved.
|
|
*/
|
|
#include "config.h"
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)mp_bh.c 10.38 (Sleepycat) 5/20/98";
|
|
#endif /* not lint */
|
|
|
|
#ifndef NO_SYSTEM_INCLUDES
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "db_int.h"
|
|
#include "shqueue.h"
|
|
#include "db_shash.h"
|
|
#include "mp.h"
|
|
#include "common_ext.h"
|
|
|
|
static int __memp_upgrade __P((DB_MPOOL *, DB_MPOOLFILE *, MPOOLFILE *));
|
|
|
|
/*
|
|
* __memp_bhwrite --
|
|
* Write the page associated with a given bucket header.
|
|
*
|
|
* PUBLIC: int __memp_bhwrite
|
|
* PUBLIC: __P((DB_MPOOL *, MPOOLFILE *, BH *, int *, int *));
|
|
*/
|
|
int
|
|
__memp_bhwrite(dbmp, mfp, bhp, restartp, wrotep)
|
|
DB_MPOOL *dbmp;
|
|
MPOOLFILE *mfp;
|
|
BH *bhp;
|
|
int *restartp, *wrotep;
|
|
{
|
|
DB_MPOOLFILE *dbmfp;
|
|
DB_MPREG *mpreg;
|
|
|
|
if (restartp != NULL)
|
|
*restartp = 0;
|
|
if (wrotep != NULL)
|
|
*wrotep = 0;
|
|
|
|
/*
|
|
* Walk the process' DB_MPOOLFILE list and find a file descriptor for
|
|
* the file. We also check that the descriptor is open for writing.
|
|
* If we find a descriptor on the file that's not open for writing, we
|
|
* try and upgrade it to make it writeable. If that fails, we're done.
|
|
*/
|
|
LOCKHANDLE(dbmp, dbmp->mutexp);
|
|
for (dbmfp = TAILQ_FIRST(&dbmp->dbmfq);
|
|
dbmfp != NULL; dbmfp = TAILQ_NEXT(dbmfp, q))
|
|
if (dbmfp->mfp == mfp) {
|
|
if (F_ISSET(dbmfp, MP_READONLY) &&
|
|
__memp_upgrade(dbmp, dbmfp, mfp)) {
|
|
UNLOCKHANDLE(dbmp, dbmp->mutexp);
|
|
return (0);
|
|
}
|
|
break;
|
|
}
|
|
UNLOCKHANDLE(dbmp, dbmp->mutexp);
|
|
if (dbmfp != NULL)
|
|
goto found;
|
|
|
|
/*
|
|
* It's not a page from a file we've opened. If the file requires
|
|
* input/output processing, see if this process has ever registered
|
|
* information as to how to write this type of file. If not, there's
|
|
* nothing we can do.
|
|
*/
|
|
if (mfp->ftype != 0) {
|
|
LOCKHANDLE(dbmp, dbmp->mutexp);
|
|
for (mpreg = LIST_FIRST(&dbmp->dbregq);
|
|
mpreg != NULL; mpreg = LIST_NEXT(mpreg, q))
|
|
if (mpreg->ftype == mfp->ftype)
|
|
break;
|
|
UNLOCKHANDLE(dbmp, dbmp->mutexp);
|
|
if (mpreg == NULL)
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Try and open the file, attaching to the underlying shared area.
|
|
*
|
|
* XXX
|
|
* Don't try to attach to temporary files. There are two problems in
|
|
* trying to do that. First, if we have different privileges than the
|
|
* process that "owns" the temporary file, we might create the backing
|
|
* disk file such that the owning process couldn't read/write its own
|
|
* buffers, e.g., memp_trickle() running as root creating a file owned
|
|
* as root, mode 600. Second, if the temporary file has already been
|
|
* created, we don't have any way of finding out what its real name is,
|
|
* and, even if we did, it was already unlinked (so that it won't be
|
|
* left if the process dies horribly). This decision causes a problem,
|
|
* however: if the temporary file consumes the entire buffer cache,
|
|
* and the owner doesn't flush the buffers to disk, we could end up
|
|
* with resource starvation, and the memp_trickle() thread couldn't do
|
|
* anything about it. That's a pretty unlikely scenario, though.
|
|
*
|
|
* XXX
|
|
* There's no negative cache, so we may repeatedly try and open files
|
|
* that we have previously tried (and failed) to open.
|
|
*
|
|
* Ignore any error, assume it's a permissions problem.
|
|
*/
|
|
if (F_ISSET(mfp, MP_TEMP))
|
|
return (0);
|
|
|
|
if (__memp_fopen(dbmp, mfp, R_ADDR(dbmp, mfp->path_off),
|
|
0, 0, mfp->stat.st_pagesize, 0, NULL, &dbmfp) != 0)
|
|
return (0);
|
|
|
|
found: return (__memp_pgwrite(dbmfp, bhp, restartp, wrotep));
|
|
}
|
|
|
|
/*
|
|
* __memp_pgread --
|
|
* Read a page from a file.
|
|
*
|
|
* PUBLIC: int __memp_pgread __P((DB_MPOOLFILE *, BH *, int));
|
|
*/
|
|
int
|
|
__memp_pgread(dbmfp, bhp, can_create)
|
|
DB_MPOOLFILE *dbmfp;
|
|
BH *bhp;
|
|
int can_create;
|
|
{
|
|
DB_MPOOL *dbmp;
|
|
MPOOLFILE *mfp;
|
|
size_t pagesize;
|
|
ssize_t nr;
|
|
int ret;
|
|
|
|
dbmp = dbmfp->dbmp;
|
|
mfp = dbmfp->mfp;
|
|
pagesize = mfp->stat.st_pagesize;
|
|
|
|
F_SET(bhp, BH_LOCKED | BH_TRASH);
|
|
LOCKBUFFER(dbmp, bhp);
|
|
UNLOCKREGION(dbmp);
|
|
|
|
/*
|
|
* Temporary files may not yet have been created.
|
|
*
|
|
* Seek to the page location.
|
|
*/
|
|
ret = 0;
|
|
LOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
if (dbmfp->fd == -1 || (ret =
|
|
__db_seek(dbmfp->fd, pagesize, bhp->pgno, 0, 0, SEEK_SET)) != 0) {
|
|
if (!can_create) {
|
|
if (dbmfp->fd == -1)
|
|
ret = EINVAL;
|
|
UNLOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
__db_err(dbmp->dbenv,
|
|
"%s: page %lu doesn't exist, create flag not set",
|
|
__memp_fn(dbmfp), (u_long)bhp->pgno);
|
|
goto err;
|
|
}
|
|
UNLOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
|
|
/* Clear the created page. */
|
|
if (mfp->clear_len == 0)
|
|
memset(bhp->buf, 0, pagesize);
|
|
else {
|
|
memset(bhp->buf, 0, mfp->clear_len);
|
|
#ifdef DIAGNOSTIC
|
|
memset(bhp->buf + mfp->clear_len,
|
|
0xff, pagesize - mfp->clear_len);
|
|
#endif
|
|
}
|
|
|
|
goto pgin;
|
|
}
|
|
|
|
/*
|
|
* Read the page; short reads are treated like creates, although
|
|
* any valid data is preserved.
|
|
*/
|
|
ret = __db_read(dbmfp->fd, bhp->buf, pagesize, &nr);
|
|
UNLOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
if (ret != 0)
|
|
goto err;
|
|
|
|
if (nr == (ssize_t)pagesize)
|
|
can_create = 0;
|
|
else {
|
|
if (!can_create) {
|
|
ret = EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* If we didn't fail until we tried the read, don't clear the
|
|
* whole page, it wouldn't be insane for a filesystem to just
|
|
* always behave that way. Else, clear any uninitialized data.
|
|
*/
|
|
if (nr == 0)
|
|
memset(bhp->buf, 0,
|
|
mfp->clear_len == 0 ? pagesize : mfp->clear_len);
|
|
else
|
|
memset(bhp->buf + nr, 0, pagesize - nr);
|
|
}
|
|
|
|
/* Call any pgin function. */
|
|
pgin: ret = mfp->ftype == 0 ? 0 : __memp_pg(dbmfp, bhp, 1);
|
|
|
|
/* Unlock the buffer and reacquire the region lock. */
|
|
err: UNLOCKBUFFER(dbmp, bhp);
|
|
LOCKREGION(dbmp);
|
|
|
|
/*
|
|
* If no errors occurred, the data is now valid, clear the BH_TRASH
|
|
* flag; regardless, clear the lock bit and let other threads proceed.
|
|
*/
|
|
F_CLR(bhp, BH_LOCKED);
|
|
if (ret == 0) {
|
|
F_CLR(bhp, BH_TRASH);
|
|
|
|
/* Update the statistics. */
|
|
if (can_create) {
|
|
++dbmp->mp->stat.st_page_create;
|
|
++mfp->stat.st_page_create;
|
|
} else {
|
|
++dbmp->mp->stat.st_page_in;
|
|
++mfp->stat.st_page_in;
|
|
}
|
|
}
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* __memp_pgwrite --
|
|
* Write a page to a file.
|
|
*
|
|
* PUBLIC: int __memp_pgwrite __P((DB_MPOOLFILE *, BH *, int *, int *));
|
|
*/
|
|
int
|
|
__memp_pgwrite(dbmfp, bhp, restartp, wrotep)
|
|
DB_MPOOLFILE *dbmfp;
|
|
BH *bhp;
|
|
int *restartp, *wrotep;
|
|
{
|
|
DB_ENV *dbenv;
|
|
DB_LOG *lg_info;
|
|
DB_LSN lsn;
|
|
DB_MPOOL *dbmp;
|
|
MPOOL *mp;
|
|
MPOOLFILE *mfp;
|
|
size_t pagesize;
|
|
ssize_t nw;
|
|
int callpgin, ret, syncfail;
|
|
const char *fail;
|
|
|
|
dbmp = dbmfp->dbmp;
|
|
dbenv = dbmp->dbenv;
|
|
mp = dbmp->mp;
|
|
mfp = dbmfp->mfp;
|
|
|
|
if (restartp != NULL)
|
|
*restartp = 0;
|
|
if (wrotep != NULL)
|
|
*wrotep = 0;
|
|
callpgin = 0;
|
|
pagesize = mfp->stat.st_pagesize;
|
|
|
|
/*
|
|
* Check the dirty bit -- this buffer may have been written since we
|
|
* decided to write it.
|
|
*/
|
|
if (!F_ISSET(bhp, BH_DIRTY)) {
|
|
if (wrotep != NULL)
|
|
*wrotep = 1;
|
|
return (0);
|
|
}
|
|
|
|
LOCKBUFFER(dbmp, bhp);
|
|
|
|
/*
|
|
* If there were two writers, we may have just been waiting while the
|
|
* other writer completed I/O on this buffer. Check the dirty bit one
|
|
* more time.
|
|
*/
|
|
if (!F_ISSET(bhp, BH_DIRTY)) {
|
|
UNLOCKBUFFER(dbmp, bhp);
|
|
|
|
if (wrotep != NULL)
|
|
*wrotep = 1;
|
|
return (0);
|
|
}
|
|
|
|
F_SET(bhp, BH_LOCKED);
|
|
UNLOCKREGION(dbmp);
|
|
|
|
if (restartp != NULL)
|
|
*restartp = 1;
|
|
|
|
/* Copy the LSN off the page if we're going to need it. */
|
|
lg_info = dbenv->lg_info;
|
|
if (lg_info != NULL || F_ISSET(bhp, BH_WRITE))
|
|
memcpy(&lsn, bhp->buf + mfp->lsn_off, sizeof(DB_LSN));
|
|
|
|
/* Ensure the appropriate log records are on disk. */
|
|
if (lg_info != NULL && (ret = log_flush(lg_info, &lsn)) != 0)
|
|
goto err;
|
|
|
|
/*
|
|
* Call any pgout function. We set the callpgin flag so that we flag
|
|
* that the contents of the buffer will need to be passed through pgin
|
|
* before they are reused.
|
|
*/
|
|
if (mfp->ftype == 0)
|
|
ret = 0;
|
|
else {
|
|
callpgin = 1;
|
|
if ((ret = __memp_pg(dbmfp, bhp, 0)) != 0)
|
|
goto err;
|
|
}
|
|
|
|
/* Temporary files may not yet have been created. */
|
|
LOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
if (dbmfp->fd == -1 &&
|
|
((ret = __db_appname(dbenv, DB_APP_TMP, NULL, NULL,
|
|
DB_CREATE | DB_EXCL | DB_TEMPORARY, &dbmfp->fd, NULL)) != 0 ||
|
|
dbmfp->fd == -1)) {
|
|
UNLOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
__db_err(dbenv, "unable to create temporary backing file");
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Write the page out.
|
|
*
|
|
* XXX
|
|
* Shut the compiler up; it doesn't understand the correlation between
|
|
* the failing clauses to __db_lseek and __db_write and this ret != 0.
|
|
*/
|
|
COMPQUIET(fail, NULL);
|
|
if ((ret =
|
|
__db_seek(dbmfp->fd, pagesize, bhp->pgno, 0, 0, SEEK_SET)) != 0)
|
|
fail = "seek";
|
|
else if ((ret = __db_write(dbmfp->fd, bhp->buf, pagesize, &nw)) != 0)
|
|
fail = "write";
|
|
UNLOCKHANDLE(dbmp, dbmfp->mutexp);
|
|
if (ret != 0)
|
|
goto syserr;
|
|
|
|
if (nw != (ssize_t)pagesize) {
|
|
ret = EIO;
|
|
fail = "write";
|
|
goto syserr;
|
|
}
|
|
|
|
if (wrotep != NULL)
|
|
*wrotep = 1;
|
|
|
|
/* Unlock the buffer and reacquire the region lock. */
|
|
UNLOCKBUFFER(dbmp, bhp);
|
|
LOCKREGION(dbmp);
|
|
|
|
/*
|
|
* Clean up the flags based on a successful write.
|
|
*
|
|
* If we rewrote the page, it will need processing by the pgin
|
|
* routine before reuse.
|
|
*/
|
|
if (callpgin)
|
|
F_SET(bhp, BH_CALLPGIN);
|
|
F_CLR(bhp, BH_DIRTY | BH_LOCKED);
|
|
|
|
/*
|
|
* If we write a buffer for which a checkpoint is waiting, update
|
|
* the count of pending buffers (both in the mpool as a whole and
|
|
* for this file). If the count for this file goes to zero, flush
|
|
* the writes.
|
|
*
|
|
* XXX:
|
|
* Don't lock the region around the sync, fsync(2) has no atomicity
|
|
* issues.
|
|
*
|
|
* XXX:
|
|
* We ignore errors from the sync -- it makes no sense to return an
|
|
* error to the calling process, so set a flag causing the checkpoint
|
|
* to be retried later.
|
|
*/
|
|
if (F_ISSET(bhp, BH_WRITE)) {
|
|
if (mfp->lsn_cnt == 1) {
|
|
UNLOCKREGION(dbmp);
|
|
syncfail = __db_fsync(dbmfp->fd) != 0;
|
|
LOCKREGION(dbmp);
|
|
if (syncfail)
|
|
F_SET(mp, MP_LSN_RETRY);
|
|
|
|
}
|
|
|
|
F_CLR(bhp, BH_WRITE);
|
|
|
|
/*
|
|
* If the buffer just written has a larger LSN than the current
|
|
* max LSN written for this checkpoint, update the saved value.
|
|
*/
|
|
if (log_compare(&lsn, &mp->lsn) > 0)
|
|
mp->lsn = lsn;
|
|
|
|
--mp->lsn_cnt;
|
|
--mfp->lsn_cnt;
|
|
}
|
|
|
|
/* Update the page clean/dirty statistics. */
|
|
++mp->stat.st_page_clean;
|
|
--mp->stat.st_page_dirty;
|
|
|
|
/* Update I/O statistics. */
|
|
++mp->stat.st_page_out;
|
|
++mfp->stat.st_page_out;
|
|
|
|
return (0);
|
|
|
|
syserr: __db_err(dbenv, "%s: %s failed for page %lu",
|
|
__memp_fn(dbmfp), fail, (u_long)bhp->pgno);
|
|
|
|
err: /* Unlock the buffer and reacquire the region lock. */
|
|
UNLOCKBUFFER(dbmp, bhp);
|
|
LOCKREGION(dbmp);
|
|
|
|
/*
|
|
* Clean up the flags based on a failure.
|
|
*
|
|
* The page remains dirty but we remove our lock. If we rewrote the
|
|
* page, it will need processing by the pgin routine before reuse.
|
|
*/
|
|
if (callpgin)
|
|
F_SET(bhp, BH_CALLPGIN);
|
|
F_CLR(bhp, BH_LOCKED);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* __memp_pg --
|
|
* Call the pgin/pgout routine.
|
|
*
|
|
* PUBLIC: int __memp_pg __P((DB_MPOOLFILE *, BH *, int));
|
|
*/
|
|
int
|
|
__memp_pg(dbmfp, bhp, is_pgin)
|
|
DB_MPOOLFILE *dbmfp;
|
|
BH *bhp;
|
|
int is_pgin;
|
|
{
|
|
DBT dbt, *dbtp;
|
|
DB_MPOOL *dbmp;
|
|
DB_MPREG *mpreg;
|
|
MPOOLFILE *mfp;
|
|
int ftype, ret;
|
|
|
|
dbmp = dbmfp->dbmp;
|
|
mfp = dbmfp->mfp;
|
|
|
|
LOCKHANDLE(dbmp, dbmp->mutexp);
|
|
|
|
ftype = mfp->ftype;
|
|
for (mpreg = LIST_FIRST(&dbmp->dbregq);
|
|
mpreg != NULL; mpreg = LIST_NEXT(mpreg, q)) {
|
|
if (ftype != mpreg->ftype)
|
|
continue;
|
|
if (mfp->pgcookie_len == 0)
|
|
dbtp = NULL;
|
|
else {
|
|
dbt.size = mfp->pgcookie_len;
|
|
dbt.data = R_ADDR(dbmp, mfp->pgcookie_off);
|
|
dbtp = &dbt;
|
|
}
|
|
UNLOCKHANDLE(dbmp, dbmp->mutexp);
|
|
|
|
if (is_pgin) {
|
|
if (mpreg->pgin != NULL && (ret =
|
|
mpreg->pgin(bhp->pgno, bhp->buf, dbtp)) != 0)
|
|
goto err;
|
|
} else
|
|
if (mpreg->pgout != NULL && (ret =
|
|
mpreg->pgout(bhp->pgno, bhp->buf, dbtp)) != 0)
|
|
goto err;
|
|
break;
|
|
}
|
|
|
|
if (mpreg == NULL)
|
|
UNLOCKHANDLE(dbmp, dbmp->mutexp);
|
|
|
|
return (0);
|
|
|
|
err: UNLOCKHANDLE(dbmp, dbmp->mutexp);
|
|
__db_err(dbmp->dbenv, "%s: %s failed for page %lu",
|
|
__memp_fn(dbmfp), is_pgin ? "pgin" : "pgout", (u_long)bhp->pgno);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* __memp_bhfree --
|
|
* Free a bucket header and its referenced data.
|
|
*
|
|
* PUBLIC: void __memp_bhfree __P((DB_MPOOL *, MPOOLFILE *, BH *, int));
|
|
*/
|
|
void
|
|
__memp_bhfree(dbmp, mfp, bhp, free_mem)
|
|
DB_MPOOL *dbmp;
|
|
MPOOLFILE *mfp;
|
|
BH *bhp;
|
|
int free_mem;
|
|
{
|
|
size_t off;
|
|
|
|
/* Delete the buffer header from the hash bucket queue. */
|
|
off = BUCKET(dbmp->mp, R_OFFSET(dbmp, mfp), bhp->pgno);
|
|
SH_TAILQ_REMOVE(&dbmp->htab[off], bhp, hq, __bh);
|
|
|
|
/* Delete the buffer header from the LRU queue. */
|
|
SH_TAILQ_REMOVE(&dbmp->mp->bhq, bhp, q, __bh);
|
|
|
|
/*
|
|
* If we're not reusing it immediately, free the buffer header
|
|
* and data for real.
|
|
*/
|
|
if (free_mem) {
|
|
__db_shalloc_free(dbmp->addr, bhp);
|
|
--dbmp->mp->stat.st_page_clean;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* __memp_upgrade --
|
|
* Upgrade a file descriptor from readonly to readwrite.
|
|
*/
|
|
static int
|
|
__memp_upgrade(dbmp, dbmfp, mfp)
|
|
DB_MPOOL *dbmp;
|
|
DB_MPOOLFILE *dbmfp;
|
|
MPOOLFILE *mfp;
|
|
{
|
|
int fd, ret;
|
|
char *rpath;
|
|
|
|
/*
|
|
* !!!
|
|
* We expect the handle to already be locked.
|
|
*/
|
|
|
|
/* Check to see if we've already upgraded. */
|
|
if (F_ISSET(dbmfp, MP_UPGRADE))
|
|
return (0);
|
|
|
|
/* Check to see if we've already failed. */
|
|
if (F_ISSET(dbmfp, MP_UPGRADE_FAIL))
|
|
return (1);
|
|
|
|
/*
|
|
* Calculate the real name for this file and try to open it read/write.
|
|
* We know we have a valid pathname for the file because it's the only
|
|
* way we could have gotten a file descriptor of any kind.
|
|
*/
|
|
if ((ret = __db_appname(dbmp->dbenv, DB_APP_DATA,
|
|
NULL, R_ADDR(dbmp, mfp->path_off), 0, NULL, &rpath)) != 0)
|
|
return (ret);
|
|
if (__db_open(rpath, 0, 0, 0, &fd) != 0) {
|
|
F_SET(dbmfp, MP_UPGRADE_FAIL);
|
|
ret = 1;
|
|
} else {
|
|
/* Swap the descriptors and set the upgrade flag. */
|
|
(void)__db_close(dbmfp->fd);
|
|
dbmfp->fd = fd;
|
|
F_SET(dbmfp, MP_UPGRADE);
|
|
ret = 0;
|
|
}
|
|
FREES(rpath);
|
|
return (ret);
|
|
}
|