tdb: cleanup: rename global_lock to allrecord_lock.

The word global is overloaded in tdb.  The global_lock inside struct
tdb_context is used to indicate we hold a lock across all the chains.

Rename it to allrecord_lock.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

ccan/tdb/lock.c

@@ -226,13 +226,13 @@ static int _tdb_lock(struct tdb_context *tdb, int list, int ltype,
 	struct tdb_lock_type *new_lck;
 	int i;
 
-	/* a global lock allows us to avoid per chain locks */
-	if (tdb->global_lock.count && 
-	    (ltype == tdb->global_lock.ltype || ltype == F_RDLCK)) {
+	/* a allrecord lock allows us to avoid per chain locks */
+	if (tdb->allrecord_lock.count &&
+	    (ltype == tdb->allrecord_lock.ltype || ltype == F_RDLCK)) {
 		return 0;
 	}
 
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		tdb->ecode = TDB_ERR_LOCK;
 		return -1;
 	}
@@ -318,12 +318,12 @@ static int _tdb_unlock(struct tdb_context *tdb, int list, int ltype,
 	struct tdb_lock_type *lck = NULL;
 
 	/* a global lock allows us to avoid per chain locks */
-	if (tdb->global_lock.count && 
-	    (ltype == tdb->global_lock.ltype || ltype == F_RDLCK)) {
+	if (tdb->allrecord_lock.count &&
+	    (ltype == tdb->allrecord_lock.ltype || ltype == F_RDLCK)) {
 		return 0;
 	}
 
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		tdb->ecode = TDB_ERR_LOCK;
 		return -1;
 	}
@@ -403,7 +403,7 @@ int tdb_unlock(struct tdb_context *tdb, int list, int ltype)
  */
 int tdb_transaction_lock(struct tdb_context *tdb, int ltype)
 {
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		return 0;
 	}
 	if (tdb->transaction_lock_count > 0) {
@@ -426,7 +426,7 @@ int tdb_transaction_lock(struct tdb_context *tdb, int ltype)
 int tdb_transaction_unlock(struct tdb_context *tdb, int ltype)
 {
 	int ret;
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		return 0;
 	}
 	if (tdb->transaction_lock_count > 1) {
@@ -453,12 +453,12 @@ static int _tdb_lockall(struct tdb_context *tdb, int ltype,
 		return -1;
 	}
 
-	if (tdb->global_lock.count && tdb->global_lock.ltype == ltype) {
-		tdb->global_lock.count++;
+	if (tdb->allrecord_lock.count && tdb->allrecord_lock.ltype == ltype) {
+		tdb->allrecord_lock.count++;
 		return 0;
 	}
 
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		/* a global lock of a different type exists */
 		tdb->ecode = TDB_ERR_LOCK;
 		return -1;
@@ -479,8 +479,8 @@ static int _tdb_lockall(struct tdb_context *tdb, int ltype,
 		return -1;
 	}
 
-	tdb->global_lock.count = 1;
-	tdb->global_lock.ltype = ltype;
+	tdb->allrecord_lock.count = 1;
+	tdb->allrecord_lock.ltype = ltype;
 
 	return 0;
 }
@@ -496,13 +496,13 @@ static int _tdb_unlockall(struct tdb_context *tdb, int ltype, bool mark_lock)
 		return -1;
 	}
 
-	if (tdb->global_lock.ltype != ltype || tdb->global_lock.count == 0) {
+	if (tdb->allrecord_lock.ltype != ltype || tdb->allrecord_lock.count == 0) {
 		tdb->ecode = TDB_ERR_LOCK;
 		return -1;
 	}
 
-	if (tdb->global_lock.count > 1) {
-		tdb->global_lock.count--;
+	if (tdb->allrecord_lock.count > 1) {
+		tdb->allrecord_lock.count--;
 		return 0;
 	}
 
@@ -513,8 +513,8 @@ static int _tdb_unlockall(struct tdb_context *tdb, int ltype, bool mark_lock)
 		return -1;
 	}
 
-	tdb->global_lock.count = 0;
-	tdb->global_lock.ltype = 0;
+	tdb->allrecord_lock.count = 0;
+	tdb->allrecord_lock.ltype = 0;
 
 	return 0;
 }
@@ -637,7 +637,7 @@ int tdb_chainunlock_read(struct tdb_context *tdb, TDB_DATA key)
 /* record lock stops delete underneath */
 int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off)
 {
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		return 0;
 	}
 	return off ? tdb->methods->brlock(tdb, F_RDLCK, off, 1, TDB_LOCK_WAIT) : 0;
@@ -668,7 +668,7 @@ int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off)
 	struct tdb_traverse_lock *i;
 	uint32_t count = 0;
 
-	if (tdb->global_lock.count) {
+	if (tdb->allrecord_lock.count) {
 		return 0;
 	}
 

ccan/tdb/open.c

@@ -461,7 +461,7 @@ static int tdb_reopen_internal(struct tdb_context *tdb, bool active_lock)
 		return 0; /* Nothing to do. */
 	}
 
-	if (tdb->num_locks != 0 || tdb->global_lock.count) {
+	if (tdb->num_locks != 0 || tdb->allrecord_lock.count) {
 		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_reopen: reopen not allowed with locks held\n"));
 		goto fail;
 	}

ccan/tdb/tdb.c

@@ -805,7 +805,7 @@ static int tdb_free_region(struct tdb_context *tdb, tdb_off_t offset, ssize_t le
 
 /*
   wipe the entire database, deleting all records. This can be done
-  very fast by using a global lock. The entire data portion of the
+  very fast by using a allrecord lock. The entire data portion of the
   file becomes a single entry in the freelist.
 
   This code carefully steps around the recovery area, leaving it alone

ccan/tdb/tdb_private.h

@@ -223,7 +223,7 @@ struct tdb_context {
 	int read_only; /* opened read-only */
 	int traverse_read; /* read-only traversal */
 	int traverse_write; /* read-write traversal */
-	struct tdb_lock_type global_lock;
+	struct tdb_lock_type allrecord_lock;
 	int num_lockrecs;
 	struct tdb_lock_type *lockrecs; /* only real locks, all with count>0 */
 	enum TDB_ERROR ecode; /* error code for last tdb error */

ccan/tdb/transaction.c

@@ -510,10 +510,10 @@ int _tdb_transaction_cancel(struct tdb_context *tdb, int ltype)
 	}
 
 	/* remove any global lock created during the transaction */
-	if (tdb->global_lock.count != 0) {
-		tdb_brunlock(tdb, tdb->global_lock.ltype,
+	if (tdb->allrecord_lock.count != 0) {
+		tdb_brunlock(tdb, tdb->allrecord_lock.ltype,
 			     FREELIST_TOP, 4*tdb->header.hash_size);
-		tdb->global_lock.count = 0;
+		tdb->allrecord_lock.count = 0;
 	}
 
 	/* remove any locks created during the transaction */
@@ -564,7 +564,7 @@ int tdb_transaction_start(struct tdb_context *tdb)
 		return 0;
 	}
 
-	if (tdb->num_locks != 0 || tdb->global_lock.count) {
+	if (tdb->num_locks != 0 || tdb->allrecord_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 */
@@ -944,7 +944,7 @@ static int _tdb_transaction_prepare_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 || tdb->global_lock.count) {
+	if (tdb->num_locks || tdb->allrecord_lock.count) {
 		tdb->ecode = TDB_ERR_LOCK;
 		TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_prepare_commit: locks pending on commit\n"));
 		_tdb_transaction_cancel(tdb, F_RDLCK);