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schannel Change to TDB_CLEAR_IF_FIRST to reduce fsync()

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By making this DB TDB_NOSYNC, and by making that safe with
TDB_CLEAR_IF_FIRST, we greatly reduce the fsync() load on the server.

This particularly helps the source4/ 'make test', which otherwise tries
to disable fsync() in ldb.

Andrew Bartlett

Signed-off-by: Jeremy Allison <jra@samba.org>
This commit is contained in:
Andrew Bartlett 2010-06-23 10:37:13 +10:00 committed by Jeremy Allison
parent cfece16498
commit c84b74dddd
1 changed files with 1 additions and 32 deletions
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33
libcli/auth/schannel_state_tdb.c
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@ -42,8 +42,6 @@
struct tdb_wrap *open_schannel_session_store(TALLOC_CTX *mem_ctx,
const char *private_dir)
{
TDB_DATA vers;
uint32_t ver;
struct tdb_wrap *tdb_sc = NULL;
char *fname = talloc_asprintf(mem_ctx, "%s/schannel_store.tdb", private_dir);
@ -51,7 +49,7 @@ struct tdb_wrap *open_schannel_session_store(TALLOC_CTX *mem_ctx,
return NULL;
}
tdb_sc = tdb_wrap_open(mem_ctx, fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
tdb_sc = tdb_wrap_open(mem_ctx, fname, 0, TDB_CLEAR_IF_FIRST|TDB_NOSYNC, O_RDWR|O_CREAT, 0600);
if (!tdb_sc) {
DEBUG(0,("open_schannel_session_store: Failed to open %s - %s\n",
@ -60,35 +58,6 @@ struct tdb_wrap *open_schannel_session_store(TALLOC_CTX *mem_ctx,
return NULL;
}
again:
vers = tdb_fetch_bystring(tdb_sc->tdb, "SCHANNEL_STORE_VERSION");
if (vers.dptr == NULL) {
/* First opener, no version. */
SIVAL(&ver,0,SCHANNEL_STORE_VERSION_CURRENT);
vers.dptr = (uint8_t *)&ver;
vers.dsize = 4;
tdb_store_bystring(tdb_sc->tdb, "SCHANNEL_STORE_VERSION", vers, TDB_REPLACE);
vers.dptr = NULL;
} else if (vers.dsize == 4) {
ver = IVAL(vers.dptr,0);
if (ver == SCHANNEL_STORE_VERSION_2) {
DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
(int)ver, fname ));
tdb_wipe_all(tdb_sc->tdb);
goto again;
}
if (ver != SCHANNEL_STORE_VERSION_CURRENT) {
DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
(int)ver, fname ));
TALLOC_FREE(tdb_sc);
}
} else {
TALLOC_FREE(tdb_sc);
DEBUG(0,("open_schannel_session_store: wrong version number size %d in %s\n",
(int)vers.dsize, fname ));
}
SAFE_FREE(vers.dptr);
TALLOC_FREE(fname);
return tdb_sc;