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This adds optional support for locking based on shared robust mutexes. The caller can use the TDB_MUTEX_LOCKING flag together with TDB_CLEAR_IF_FIRST after verifying with tdb_runtime_check_for_robust_mutexes() that it's supported by the current system. The caller should be aware that using TDB_MUTEX_LOCKING implies some limitations, e.g. it's not possible to have multiple read chainlocks on a given hash chain from multiple processes. Note: that this doesn't make tdb thread safe! Pair-Programmed-With: Stefan Metzmacher <metze@samba.org> Pair-Programmed-With: Michael Adam <obnox@samba.org> Signed-off-by: Volker Lendecke <vl@samba.org> Signed-off-by: Stefan Metzmacher <metze@samba.org> Signed-off-by: Michael Adam <obnox@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
#include "lock-tracking.h"
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#include "../common/tdb_private.h"
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#define fcntl fcntl_with_lockcheck
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#include "../common/io.c"
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#include "../common/tdb.c"
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#include "../common/lock.c"
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#include "../common/freelist.c"
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#include "../common/traverse.c"
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#include "../common/transaction.c"
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#include "../common/error.c"
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#include "../common/open.c"
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#include "../common/check.c"
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#include "../common/hash.c"
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#include "../common/mutex.c"
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#include "tap-interface.h"
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#undef fcntl_with_lockcheck
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#include <stdlib.h>
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#include <stdbool.h>
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#include "external-agent.h"
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#include "logging.h"
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static struct agent *agent;
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static bool correct_key(TDB_DATA key)
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{
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return key.dsize == strlen("hi")
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&& memcmp(key.dptr, "hi", key.dsize) == 0;
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}
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static bool correct_data(TDB_DATA data)
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{
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return data.dsize == strlen("world")
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&& memcmp(data.dptr, "world", data.dsize) == 0;
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}
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static int traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
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void *p)
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{
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ok1(correct_key(key));
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ok1(correct_data(data));
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return 0;
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}
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int main(int argc, char *argv[])
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{
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struct tdb_context *tdb;
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TDB_DATA key, data;
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plan_tests(13);
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agent = prepare_external_agent();
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tdb = tdb_open_ex("run-traverse-in-transaction.tdb",
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1024, TDB_CLEAR_IF_FIRST, O_CREAT|O_TRUNC|O_RDWR,
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0600, &taplogctx, NULL);
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ok1(tdb);
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key.dsize = strlen("hi");
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key.dptr = discard_const_p(uint8_t, "hi");
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data.dptr = discard_const_p(uint8_t, "world");
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data.dsize = strlen("world");
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ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
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ok1(external_agent_operation(agent, OPEN, tdb_name(tdb)) == SUCCESS);
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ok1(tdb_transaction_start(tdb) == 0);
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ok1(external_agent_operation(agent, TRANSACTION_START, tdb_name(tdb))
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== WOULD_HAVE_BLOCKED);
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tdb_traverse(tdb, traverse, NULL);
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/* That should *not* release the transaction lock! */
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ok1(external_agent_operation(agent, TRANSACTION_START, tdb_name(tdb))
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== WOULD_HAVE_BLOCKED);
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tdb_traverse_read(tdb, traverse, NULL);
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/* That should *not* release the transaction lock! */
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ok1(external_agent_operation(agent, TRANSACTION_START, tdb_name(tdb))
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== WOULD_HAVE_BLOCKED);
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ok1(tdb_transaction_commit(tdb) == 0);
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/* Now we should be fine. */
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ok1(external_agent_operation(agent, TRANSACTION_START, tdb_name(tdb))
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== SUCCESS);
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tdb_close(tdb);
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return exit_status();
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}
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