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authorUlrich Drepper <drepper@redhat.com>1997-08-27 20:26:10 +0000
committerUlrich Drepper <drepper@redhat.com>1997-08-27 20:26:10 +0000
commit92f1da4da04a7a86ddee91be5eaf0b10c333ac64 (patch)
tree2a10ce9e4e407e7e5b5ca092ca0947d234b5ff60 /db2/mp/mp_sync.c
parent22be878ecbc66606371bd33258f56e6711e6ba7a (diff)
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1997-08-10 19:17 Philip Blundell <Philip.Blundell@pobox.com> * nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>. Somebody should update this to use the new db API. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_db/db-alias.c: Likewise. * db2/Makefile: Makefile for db-2.x in glibc. 1997-08-27 21:20 Ulrich Drepper <drepper@cygnus.com> * csu/Makefile (before-compile): New goal. Make sure abi-tag.h is generated. [$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found. * Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add -D__USE_STRING_INLINES. * string/string.f: Move strnlen optimization after inclusion of <bits/string.h>. Include <bits/string.h> only if __USE_STRING_INLINES is defined. * sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name in <bits/string.h>. * sysdeps/generic/memset.c: Likewise. * sysdeps/i386/string.h: i386 optimized string functions. * sysdeps/i386/i486string.h: i486+ optimized string functions. * Makefile (subdirs): Change db to db2. * shlib-versions: Bump libdb verion number to 3. * include/db.h: Include from db2 directory. * include/db_185.h: New file. * sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros to provide spinlock information for db2. * sysdeps/m68k/m68020/Makefile: New file. Likewise. * sysdeps/sparc/Makefile: New file. Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS): Add -DHAVE_LLSEEK. * db2/config.h: Hand-edited config file for db2 in glibc. * db2/compat.h: New file from db-2.3.4. * db2/db.h: Likewise. * db2/db_185.h: Likewise. * db2/db_int.h: Likewise. * db2/makedb.c: Likewise. * db2/btree/bt_close.c: Likewise. * db2/btree/bt_compare.c: Likewise. * db2/btree/bt_conv.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_page.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/btree/bt_rsearch.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_err.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_salloc.c: Likewise. * db2/common/db_log2.c: Likewise. * db2/common/db_region.c: Likewise. * db2/common/db_shash.c: Likewise. * db2/db/db.c: Likewise. * db2/db/db.src: Likewise. * db2/db/db_conv.c: Likewise. * db2/db/db_dispatch.c: Likewise. * db2/db/db_dup.c: Likewise. * db2/db/db_overflow.c: Likewise. * db2/db/db_pr.c: Likewise. * db2/db/db_rec.c: Likewise. * db2/db/db_ret.c: Likewise. * db2/db/db_thread.c: Likewise. * db2/db/db_auto.c: Likewise. * db2/db185/db185.c: Likewise. * db2/db185/db185_int.h: Likewise. * db2/dbm/dbm.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_conv.c: Likewise. * db2/hash/hash_debug.c: Likewise. * db2/hash/hash_stat.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_func.c: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/include/mp.h: Likewise. * db2/include/btree.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/db_shash.h: Likewise. * db2/include/db_swap.h: Likewise. * db2/include/db_185.h.src: Likewise. * db2/include/txn.h: Likewise. * db2/include/db_am.h: Likewise. * db2/include/shqueue.h: Likewise. * db2/include/hash.h: Likewise. * db2/include/db_dispatch.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/db_page.h: Likewise. * db2/include/log.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/log_auto.h: Likewise. * db2/include/txn_auto.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/include/cxx_int.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/queue.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_conflict.c: Likewise. * db2/lock/lock_util.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log.src: Likewise. * db2/log/log_compare.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_register.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/mp/mp_bh.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fopen.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_fset.c: Likewise. * db2/mp/mp_open.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_pr.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/68020.gcc: Likewise. * db2/mutex/mutex.c: Likewise. * db2/mutex/README: Likewise. * db2/mutex/x86.gcc: Likewise. * db2/mutex/sparc.gcc: Likewise. * db2/mutex/uts4.cc.s: Likewise. * db2/mutex/alpha.dec: Likewise. * db2/mutex/alpha.gcc: Likewise. * db2/mutex/parisc.gcc: Likewise. * db2/mutex/parisc.hp: Likewise. * db2/os/db_os_abs.c: Likewise. * db2/os/db_os_dir.c: Likewise. * db2/os/db_os_fid.c: Likewise. * db2/os/db_os_lseek.c: Likewise. * db2/os/db_os_mmap.c: Likewise. * db2/os/db_os_open.c: Likewise. * db2/os/db_os_rw.c: Likewise. * db2/os/db_os_sleep.c: Likewise. * db2/os/db_os_stat.c: Likewise. * db2/os/db_os_unlink.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn.src: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/clib/getlong.c: Likewise. * db2/progs/db_archive/db_archive.c: Likewise. * db2/progs/db_checkpoint/db_checkpoint.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_dump185/db_dump185.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_printlog/db_printlog.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline. * po/de.po, po/sv.po: Update from 2.0.5 translations. * sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print. * sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback as const. * sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const. * sunrpx/xdr_rec.c (xdrrec_destroy): Likewise. * sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise. 1997-08-27 18:47 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>. Reported by Benjamin Kosnik <bkoz@cygnus.com>. 1997-08-27 02:27 Roland McGrath <roland@baalperazim.frob.com> * abi-tags: New file. * csu/Makefile (distribute): Remove abi-tag.h. ($(objpfx)abi-tag.h): New target. * Makefile (distribute): Add abi-tags. * sysdeps/unix/sysv/linux/abi-tag.h: File removed. * sysdeps/mach/hurd/abi-tag.h: File removed. * sysdeps/stub/abi-tag.h: File removed. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/make-syscalls.sh: Change output so that it generates compilation rules only for the currently selected object suffixes. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous section to avoid confusing the compiler. * sysdeps/alpha/dl-machine.h (RTLD_START): Likewise. * sysdeps/i386/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT relocation instead of a constant to avoid text relocation. (ELF_MACHINE_BEFORE_RTLD_RELOC): Removed. (RTLD_START): Declare global labels as functions and add size directive. 1997-08-25 17:01 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/bits/select.h: Correct assembler versions to work even for descriptors >= 32. * stdlib/alloca.h: Don't define alloca to __alloca since if gcc is used __alloca is not defined to __builtin_alloca and so might not be available. Reported by Uwe Ohse <uwe@ohse.de>. * sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special way if gcc is not used and so dev_t is an array. Reported by Uwe Ohse <uwe@ohse.de>. 1997-08-23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/libc.texinfo: Reorder chapters to match logical order. 1997-08-25 12:22 Ulrich Drepper <drepper@cygnus.com> * sunrpc/rpc/xdr.h: Change name of parameters in prototypes of xdr_reference, xdrmem_create, and xdrstdio_create because of clash with g++ internal symbols. Patch by Sudish Joseph <sj@eng.mindspring.net>. * elf/dl-deps.c: Implement handling of DT_FILTER.
Diffstat (limited to 'db2/mp/mp_sync.c')
-rw-r--r--db2/mp/mp_sync.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/db2/mp/mp_sync.c b/db2/mp/mp_sync.c
new file mode 100644
index 0000000000..4f1205661a
--- /dev/null
+++ b/db2/mp/mp_sync.c
@@ -0,0 +1,205 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996, 1997
+ * Sleepycat Software. All rights reserved.
+ */
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)mp_sync.c 10.8 (Sleepycat) 7/2/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <errno.h>
+#include <string.h>
+#endif
+
+#include "db_int.h"
+#include "shqueue.h"
+#include "db_shash.h"
+#include "mp.h"
+#include "common_ext.h"
+
+/*
+ * memp_sync --
+ * Mpool sync function.
+ */
+int
+memp_sync(dbmp, lsnp)
+ DB_MPOOL *dbmp;
+ DB_LSN *lsnp;
+{
+ BH *bhp;
+ DB_ENV *dbenv;
+ MPOOL *mp;
+ MPOOLFILE *mfp;
+ int can_write, wrote, lsn_cnt, restart, ret;
+
+ dbenv = dbmp->dbenv;
+
+ if (dbmp->dbenv->lg_info == NULL) {
+ __db_err(dbenv, "memp_sync requires logging");
+ return (EINVAL);
+ }
+
+ LOCKREGION(dbmp);
+
+ /*
+ * If the application is asking about a previous call, and we haven't
+ * found any buffers that the application holding the pin couldn't
+ * write, return yes or no based on the current count. Note, if the
+ * application is asking about a LSN *smaller* than one we've already
+ * handled, then we return based on the count for that LSN.
+ */
+ mp = dbmp->mp;
+ if (!F_ISSET(mp, MP_LSN_RETRY) && log_compare(lsnp, &mp->lsn) <= 0) {
+ if (mp->lsn_cnt == 0) {
+ *lsnp = mp->lsn;
+ ret = 0;
+ } else
+ ret = DB_INCOMPLETE;
+
+ UNLOCKREGION(dbmp);
+ return (ret);
+ }
+
+ /* Else, it's a new checkpoint. */
+ F_CLR(mp, MP_LSN_RETRY);
+
+ /*
+ * Save the LSN. We know that it's a new LSN or larger than the one
+ * for which we were already doing a checkpoint. (BTW, I don't expect
+ * to see multiple LSN's from the same or multiple processes, but You
+ * Just Never Know. Responding as if they all called with the largest
+ * of the LSNs specified makes everything work.
+ *
+ * We don't currently use the LSN we save. We could potentially save
+ * the last-written LSN in each buffer header and use it to determine
+ * what buffers need to be written. The problem with this is that it's
+ * sizeof(LSN) more bytes of buffer header. We currently write all the
+ * dirty buffers instead.
+ *
+ * Walk the list of shared memory segments clearing the count of
+ * buffers waiting to be written.
+ */
+ mp->lsn = *lsnp;
+ mp->lsn_cnt = 0;
+ for (mfp = SH_TAILQ_FIRST(&dbmp->mp->mpfq, __mpoolfile);
+ mfp != NULL; mfp = SH_TAILQ_NEXT(mfp, q, __mpoolfile))
+ mfp->lsn_cnt = 0;
+
+ /*
+ * Walk the list of buffers and mark all dirty buffers to be written
+ * and all pinned buffers to be potentially written. We do this in
+ * single fell swoop while holding the region locked so that processes
+ * can't make new buffers dirty, causing us to never finish. Since
+ * the application may have restarted the sync, clear any BH_WRITE
+ * flags that appear to be left over.
+ */
+ can_write = lsn_cnt = 0;
+ for (lsn_cnt = 0, bhp = SH_TAILQ_FIRST(&mp->bhq, __bh);
+ bhp != NULL; bhp = SH_TAILQ_NEXT(bhp, q, __bh))
+ if (F_ISSET(bhp, BH_DIRTY) || bhp->ref != 0) {
+ F_SET(bhp, BH_WRITE);
+
+ if (bhp->ref == 0)
+ can_write = 1;
+
+ mfp = ADDR(dbmp, bhp->mf_offset);
+ ++mfp->lsn_cnt;
+
+ ++lsn_cnt;
+ } else
+ F_CLR(bhp, BH_WRITE);
+
+ mp->lsn_cnt = lsn_cnt;
+
+ /* If there no buffers we can write, we're done. */
+ if (!can_write) {
+ UNLOCKREGION(dbmp);
+ return (mp->lsn_cnt ? DB_INCOMPLETE : 0);
+ }
+
+ /*
+ * Write any buffers that we can. Restart the walk after each write,
+ * __memp_pgwrite() discards and reacquires the region lock during I/O.
+ */
+retry: for (bhp = SH_TAILQ_FIRST(&mp->bhq, __bh);
+ bhp != NULL; bhp = SH_TAILQ_NEXT(bhp, q, __bh)) {
+ /* Ignore pinned or locked buffers. */
+ if (!F_ISSET(bhp, BH_WRITE) ||
+ bhp->ref != 0 || F_ISSET(bhp, BH_LOCKED))
+ continue;
+
+ mfp = ADDR(dbmp, bhp->mf_offset);
+ if ((ret =
+ __memp_bhwrite(dbmp, mfp, bhp, &restart, &wrote)) != 0)
+ goto err;
+ if (wrote) {
+ if (restart)
+ goto retry;
+ continue;
+ }
+ __db_err(dbenv, "%s: unable to flush page: %lu",
+ ADDR(dbmp, mfp->path_off), (u_long)bhp->pgno);
+ ret = EPERM;
+ goto err;
+ }
+ ret = mp->lsn_cnt ? DB_INCOMPLETE : 0;
+
+err: UNLOCKREGION(dbmp);
+ return (ret);
+}
+
+/*
+ * memp_fsync --
+ * Mpool file sync function.
+ */
+int
+memp_fsync(dbmfp)
+ DB_MPOOLFILE *dbmfp;
+{
+ BH *bhp;
+ DB_MPOOL *dbmp;
+ size_t mf_offset;
+ int pincnt, restart, ret, wrote;
+
+ /* We don't sync temporary files -- what's the use? */
+ if (F_ISSET(dbmfp, MP_PATH_TEMP))
+ return (0);
+
+ dbmp = dbmfp->dbmp;
+ ret = 0;
+
+ mf_offset = OFFSET(dbmp, dbmfp->mfp);
+
+ LOCKREGION(dbmp);
+
+ /*
+ * Walk the list of buffer headers for the MPOOLFILE, and write out any
+ * dirty buffers that we can.
+ */
+retry: pincnt = 0;
+ for (bhp = SH_TAILQ_FIRST(&dbmp->mp->bhq, __bh);
+ bhp != NULL; bhp = SH_TAILQ_NEXT(bhp, q, __bh))
+ if (F_ISSET(bhp, BH_DIRTY) && bhp->mf_offset == mf_offset) {
+ if (bhp->ref != 0 || F_ISSET(bhp, BH_LOCKED)) {
+ ++pincnt;
+ continue;
+ }
+ if ((ret =
+ __memp_pgwrite(dbmfp, bhp, &restart, &wrote)) != 0)
+ goto err;
+ if (!wrote)
+ ++pincnt;
+ if (restart)
+ goto retry;
+ }
+
+ UNLOCKREGION(dbmp);
+
+err: return (ret == 0 ? (pincnt ? DB_INCOMPLETE : 0) : ret);
+}