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Diffstat (limited to 'source4/lib/tdb/common/transaction.c')
-rw-r--r--source4/lib/tdb/common/transaction.c36
1 files changed, 21 insertions, 15 deletions
diff --git a/source4/lib/tdb/common/transaction.c b/source4/lib/tdb/common/transaction.c
index a6fa8a7f66..526aef7d03 100644
--- a/source4/lib/tdb/common/transaction.c
+++ b/source4/lib/tdb/common/transaction.c
@@ -357,7 +357,7 @@ static int transaction_expand_file(struct tdb_context *tdb, tdb_off_t size,
brlock during a transaction - ignore them
*/
int transaction_brlock(struct tdb_context *tdb, tdb_off_t offset,
- int rw_type, int lck_type, int probe)
+ int rw_type, int lck_type, int probe, size_t len)
{
return 0;
}
@@ -393,7 +393,7 @@ int tdb_transaction_start(struct tdb_context *tdb)
return 0;
}
- if (tdb->num_locks != 0) {
+ if (tdb->num_locks != 0 || tdb->global_lock.count) {
/* the caller must not have any locks when starting a
transaction as otherwise we'll be screwed by lack
of nested locks in posix */
@@ -420,7 +420,7 @@ int tdb_transaction_start(struct tdb_context *tdb)
/* get the transaction write lock. This is a blocking lock. As
discussed with Volker, there are a number of ways we could
make this async, which we will probably do in the future */
- if (tdb_brlock_len(tdb, TRANSACTION_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
+ if (tdb_brlock(tdb, TRANSACTION_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: failed to get transaction lock\n"));
tdb->ecode = TDB_ERR_LOCK;
SAFE_FREE(tdb->transaction);
@@ -429,7 +429,7 @@ int tdb_transaction_start(struct tdb_context *tdb)
/* get a read lock from the freelist to the end of file. This
is upgraded to a write lock during the commit */
- if (tdb_brlock_len(tdb, FREELIST_TOP, F_RDLCK, F_SETLKW, 0, 0) == -1) {
+ if (tdb_brlock(tdb, FREELIST_TOP, F_RDLCK, F_SETLKW, 0, 0) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_start: failed to get hash locks\n"));
tdb->ecode = TDB_ERR_LOCK;
goto fail;
@@ -471,8 +471,8 @@ int tdb_transaction_start(struct tdb_context *tdb)
return 0;
fail:
- tdb_brlock_len(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
- tdb_brlock_len(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
+ tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
SAFE_FREE(tdb->transaction->hash_heads);
SAFE_FREE(tdb->transaction);
return -1;
@@ -505,12 +505,18 @@ int tdb_transaction_cancel(struct tdb_context *tdb)
free(el);
}
+ /* remove any global lock created during the transaction */
+ if (tdb->global_lock.count != 0) {
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 4*tdb->header.hash_size);
+ tdb->global_lock.count = 0;
+ }
+
/* remove any locks created during the transaction */
if (tdb->num_locks != 0) {
int h;
for (h=0;h<tdb->header.hash_size+1;h++) {
if (tdb->locked[h].count != 0) {
- tdb_brlock_len(tdb,FREELIST_TOP+4*h,F_UNLCK,F_SETLKW, 0, 1);
+ tdb_brlock(tdb,FREELIST_TOP+4*h,F_UNLCK,F_SETLKW, 0, 1);
tdb->locked[h].count = 0;
}
}
@@ -520,8 +526,8 @@ int tdb_transaction_cancel(struct tdb_context *tdb)
/* restore the normal io methods */
tdb->methods = tdb->transaction->io_methods;
- tdb_brlock_len(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
- tdb_brlock_len(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW, 0, 0);
+ tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
SAFE_FREE(tdb->transaction->hash_heads);
SAFE_FREE(tdb->transaction);
@@ -800,7 +806,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
/* if there are any locks pending then the caller has not
nested their locks properly, so fail the transaction */
- if (tdb->num_locks) {
+ if (tdb->num_locks || tdb->global_lock.count) {
tdb->ecode = TDB_ERR_LOCK;
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_commit: locks pending on commit\n"));
tdb_transaction_cancel(tdb);
@@ -817,7 +823,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
/* get the global lock - this prevents new users attaching to the database
during the commit */
- if (tdb_brlock_len(tdb, GLOBAL_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
+ if (tdb_brlock(tdb, GLOBAL_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_commit: failed to get global lock\n"));
tdb->ecode = TDB_ERR_LOCK;
tdb_transaction_cancel(tdb);
@@ -828,7 +834,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
/* write the recovery data to the end of the file */
if (transaction_setup_recovery(tdb, &magic_offset) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: failed to setup recovery data\n"));
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
tdb_transaction_cancel(tdb);
return -1;
}
@@ -841,7 +847,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
tdb->transaction->old_map_size) == -1) {
tdb->ecode = TDB_ERR_IO;
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: expansion failed\n"));
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
tdb_transaction_cancel(tdb);
return -1;
}
@@ -863,7 +869,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
tdb_transaction_recover(tdb);
tdb_transaction_cancel(tdb);
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_transaction_commit: write failed\n"));
return -1;
@@ -891,7 +897,7 @@ int tdb_transaction_commit(struct tdb_context *tdb)
}
}
- tdb_brlock_len(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
+ tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1);
/*
TODO: maybe write to some dummy hdr field, or write to magic