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1386200be5
At more than one large site I've seen significant problems due to gencache_stabilize. gencache_stabilize was mainly introduced to survive machine crashes with the cache still being in place. Given that most installations crash rarely and this is still a cache, this safety is overkill and causes real problems. With the recent changes to tdb, we should be safe enough to run on completely corrupted databases and properly detect errors. A further commit will introduce code that wipes the gencache.tdb if such a corruption is detected. There is one kind of corruption that we don't properly handle: Orphaned space in the database. I don't have a good idea yet how to handle this in a graceful and efficient way during normal operations, but maybe this idea pops up at some point. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
/*
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* Unix SMB/CIFS implementation.
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*
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* Generic, persistent and shared between processes cache mechanism for use
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* by various parts of the Samba code
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*
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* Copyright (C) Rafal Szczesniak 2002
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* Copyright (C) Volker Lendecke 2009
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __LIB_GENCACHE_H__
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#define __LIB_GENCACHE_H__
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#include "replace.h"
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#include "system/time.h"
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#include "lib/util/data_blob.h"
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bool gencache_set(const char *keystr, const char *value, time_t timeout);
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bool gencache_del(const char *keystr);
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bool gencache_get(const char *keystr, TALLOC_CTX *mem_ctx, char **value,
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time_t *ptimeout);
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/*
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* This might look like overkill, but namemap_cache.c shows it's
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* necessary :-)
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*/
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struct gencache_timeout;
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bool gencache_timeout_expired(const struct gencache_timeout *t);
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bool gencache_parse(const char *keystr,
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void (*parser)(const struct gencache_timeout *timeout,
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DATA_BLOB blob,
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void *private_data),
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void *private_data);
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bool gencache_get_data_blob(const char *keystr, TALLOC_CTX *mem_ctx,
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DATA_BLOB *blob,
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time_t *timeout, bool *was_expired);
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bool gencache_set_data_blob(const char *keystr, DATA_BLOB blob,
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time_t timeout);
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void gencache_iterate_blobs(void (*fn)(const char *key, DATA_BLOB value,
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time_t timeout, void *private_data),
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void *private_data, const char *pattern);
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void gencache_iterate(void (*fn)(const char* key, const char *value,
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time_t timeout, void* dptr),
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void* data, const char* keystr_pattern);
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#endif
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