X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Ftdb.c;h=62607bf1e5d8eb2f4c9bf9002aa9b30e299a9af9;hp=7484695d7ab9a8724eb178e82bf3e1a9e52a58e2;hb=24e5ddb143fb5e79112649472258f5da67cc7362;hpb=6e3d9e8a66bf8b45150500f176452ee8e9ee9927

diff --git a/ccan/tdb2/tdb.c b/ccan/tdb2/tdb.c
index 7484695d..62607bf1 100644
--- a/ccan/tdb2/tdb.c
+++ b/ccan/tdb2/tdb.c
@@ -50,7 +50,7 @@ static enum TDB_ERROR replace_data(struct tdb_context *tdb,
 	new_off = alloc(tdb, key.dsize, dbuf.dsize, h->h, TDB_USED_MAGIC,
 			growing);
 	if (TDB_OFF_IS_ERR(new_off)) {
-		return new_off;
+		return TDB_OFF_TO_ERR(new_off);
 	}
 
 	/* We didn't like the existing one: remove it. */
@@ -70,13 +70,13 @@ static enum TDB_ERROR replace_data(struct tdb_context *tdb,
 	}
 
 	new_off += sizeof(struct tdb_used_record);
-	ecode = tdb->methods->twrite(tdb, new_off, key.dptr, key.dsize);
+	ecode = tdb->tdb2.io->twrite(tdb, new_off, key.dptr, key.dsize);
 	if (ecode != TDB_SUCCESS) {
 		return ecode;
 	}
 
 	new_off += key.dsize;
-	ecode = tdb->methods->twrite(tdb, new_off, dbuf.dptr, dbuf.dsize);
+	ecode = tdb->tdb2.io->twrite(tdb, new_off, dbuf.dptr, dbuf.dsize);
 	if (ecode != TDB_SUCCESS) {
 		return ecode;
 	}
@@ -94,10 +94,10 @@ static enum TDB_ERROR update_data(struct tdb_context *tdb,
 {
 	enum TDB_ERROR ecode;
 
-	ecode = tdb->methods->twrite(tdb, off, dbuf.dptr, dbuf.dsize);
+	ecode = tdb->tdb2.io->twrite(tdb, off, dbuf.dptr, dbuf.dsize);
 	if (ecode == TDB_SUCCESS && extra) {
 		/* Put a zero in; future versions may append other data. */
-		ecode = tdb->methods->twrite(tdb, off + dbuf.dsize, "", 1);
+		ecode = tdb->tdb2.io->twrite(tdb, off + dbuf.dsize, "", 1);
 	}
 	if (tdb->flags & TDB_SEQNUM)
 		tdb_inc_seqnum(tdb);
@@ -114,9 +114,15 @@ enum TDB_ERROR tdb_store(struct tdb_context *tdb,
 	struct tdb_used_record rec;
 	enum TDB_ERROR ecode;
 
+	if (tdb->flags & TDB_VERSION1) {
+		if (tdb1_store(tdb, key, dbuf, flag) == -1)
+			return tdb->last_error;
+		return TDB_SUCCESS;
+	}
+
 	off = find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL);
 	if (TDB_OFF_IS_ERR(off)) {
-		return tdb->last_error = off;
+		return tdb->last_error = TDB_OFF_TO_ERR(off);
 	}
 
 	/* Now we have lock on this hash bucket. */
@@ -177,9 +183,15 @@ enum TDB_ERROR tdb_append(struct tdb_context *tdb,
 	struct tdb_data new_dbuf;
 	enum TDB_ERROR ecode;
 
+	if (tdb->flags & TDB_VERSION1) {
+		if (tdb1_append(tdb, key, dbuf) == -1)
+			return tdb->last_error;
+		return TDB_SUCCESS;
+	}
+
 	off = find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL);
 	if (TDB_OFF_IS_ERR(off)) {
-		return tdb->last_error = off;
+		return tdb->last_error = TDB_OFF_TO_ERR(off);
 	}
 
 	if (off) {
@@ -211,7 +223,7 @@ enum TDB_ERROR tdb_append(struct tdb_context *tdb,
 						    + dbuf.dsize));
 			goto out;
 		}
-		ecode = tdb->methods->tread(tdb, off + sizeof(rec) + key.dsize,
+		ecode = tdb->tdb2.io->tread(tdb, off + sizeof(rec) + key.dsize,
 					    newdata, old_dlen);
 		if (ecode != TDB_SUCCESS) {
 			goto out_free_newdata;
@@ -242,9 +254,12 @@ enum TDB_ERROR tdb_fetch(struct tdb_context *tdb, struct tdb_data key,
 	struct hash_info h;
 	enum TDB_ERROR ecode;
 
+	if (tdb->flags & TDB_VERSION1)
+		return tdb1_fetch(tdb, key, data);
+
 	off = find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL);
 	if (TDB_OFF_IS_ERR(off)) {
-		return tdb->last_error = off;
+		return tdb->last_error = TDB_OFF_TO_ERR(off);
 	}
 
 	if (!off) {
@@ -269,9 +284,13 @@ bool tdb_exists(struct tdb_context *tdb, TDB_DATA key)
 	struct tdb_used_record rec;
 	struct hash_info h;
 
+	if (tdb->flags & TDB_VERSION1) {
+		return tdb1_exists(tdb, key);
+	}
+
 	off = find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL);
 	if (TDB_OFF_IS_ERR(off)) {
-		tdb->last_error = off;
+		tdb->last_error = TDB_OFF_TO_ERR(off);
 		return false;
 	}
 	tdb_unlock_hashes(tdb, h.hlock_start, h.hlock_range, F_RDLCK);
@@ -287,9 +306,15 @@ enum TDB_ERROR tdb_delete(struct tdb_context *tdb, struct tdb_data key)
 	struct hash_info h;
 	enum TDB_ERROR ecode;
 
+	if (tdb->flags & TDB_VERSION1) {
+		if (tdb1_delete(tdb, key) == -1)
+			return tdb->last_error;
+		return TDB_SUCCESS;
+	}
+
 	off = find_and_lock(tdb, key, F_WRLCK, &h, &rec, NULL);
 	if (TDB_OFF_IS_ERR(off)) {
-		return tdb->last_error = off;
+		return tdb->last_error = TDB_OFF_TO_ERR(off);
 	}
 
 	if (!off) {
@@ -324,6 +349,27 @@ unsigned int tdb_get_flags(struct tdb_context *tdb)
 	return tdb->flags;
 }
 
+static bool inside_transaction(const struct tdb_context *tdb)
+{
+	if (tdb->flags & TDB_VERSION1)
+		return tdb->tdb1.transaction != NULL;
+	else
+		return tdb->tdb2.transaction != NULL;
+}
+
+static bool readonly_changable(struct tdb_context *tdb, const char *caller)
+{
+	if (inside_transaction(tdb)) {
+		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
+					     TDB_LOG_USE_ERROR,
+					     "%s: can't change"
+					     " TDB_RDONLY inside transaction",
+					     caller);
+		return false;
+	}
+	return true;
+}
+
 void tdb_add_flag(struct tdb_context *tdb, unsigned flag)
 {
 	if (tdb->flags & TDB_INTERNAL) {
@@ -349,6 +395,10 @@ void tdb_add_flag(struct tdb_context *tdb, unsigned flag)
 	case TDB_ALLOW_NESTING:
 		tdb->flags |= TDB_ALLOW_NESTING;
 		break;
+	case TDB_RDONLY:
+		if (readonly_changable(tdb, "tdb_add_flag"))
+			tdb->flags |= TDB_RDONLY;
+		break;
 	default:
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
 					     TDB_LOG_USE_ERROR,
@@ -382,6 +432,18 @@ void tdb_remove_flag(struct tdb_context *tdb, unsigned flag)
 	case TDB_ALLOW_NESTING:
 		tdb->flags &= ~TDB_ALLOW_NESTING;
 		break;
+	case TDB_RDONLY:
+		if ((tdb->open_flags & O_ACCMODE) == O_RDONLY) {
+			tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
+						     TDB_LOG_USE_ERROR,
+						     "tdb_remove_flag: can't"
+						     " remove TDB_RDONLY on tdb"
+						     " opened with O_RDONLY");
+			break;
+		}
+		if (readonly_changable(tdb, "tdb_remove_flag"))
+			tdb->flags &= ~TDB_RDONLY;
+		break;
 	default:
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
 					     TDB_LOG_USE_ERROR,
@@ -393,16 +455,16 @@ void tdb_remove_flag(struct tdb_context *tdb, unsigned flag)
 const char *tdb_errorstr(enum TDB_ERROR ecode)
 {
 	/* Gcc warns if you miss a case in the switch, so use that. */
-	switch (ecode) {
-	case TDB_SUCCESS: return "Success";
-	case TDB_ERR_CORRUPT: return "Corrupt database";
-	case TDB_ERR_IO: return "IO Error";
-	case TDB_ERR_LOCK: return "Locking error";
-	case TDB_ERR_OOM: return "Out of memory";
-	case TDB_ERR_EXISTS: return "Record exists";
-	case TDB_ERR_EINVAL: return "Invalid parameter";
-	case TDB_ERR_NOEXIST: return "Record does not exist";
-	case TDB_ERR_RDONLY: return "write not permitted";
+	switch (TDB_ERR_TO_OFF(ecode)) {
+	case TDB_ERR_TO_OFF(TDB_SUCCESS): return "Success";
+	case TDB_ERR_TO_OFF(TDB_ERR_CORRUPT): return "Corrupt database";
+	case TDB_ERR_TO_OFF(TDB_ERR_IO): return "IO Error";
+	case TDB_ERR_TO_OFF(TDB_ERR_LOCK): return "Locking error";
+	case TDB_ERR_TO_OFF(TDB_ERR_OOM): return "Out of memory";
+	case TDB_ERR_TO_OFF(TDB_ERR_EXISTS): return "Record exists";
+	case TDB_ERR_TO_OFF(TDB_ERR_EINVAL): return "Invalid parameter";
+	case TDB_ERR_TO_OFF(TDB_ERR_NOEXIST): return "Record does not exist";
+	case TDB_ERR_TO_OFF(TDB_ERR_RDONLY): return "write not permitted";
 	}
 	return "Invalid error code";
 }
@@ -454,9 +516,14 @@ enum TDB_ERROR tdb_parse_record_(struct tdb_context *tdb,
 	struct hash_info h;
 	enum TDB_ERROR ecode;
 
+	if (tdb->flags & TDB_VERSION1) {
+		return tdb->last_error = tdb1_parse_record(tdb, key, parse,
+							   data);
+	}
+
 	off = find_and_lock(tdb, key, F_RDLCK, &h, &rec, NULL);
 	if (TDB_OFF_IS_ERR(off)) {
-		return tdb->last_error = off;
+		return tdb->last_error = TDB_OFF_TO_ERR(off);
 	}
 
 	if (!off) {
@@ -486,9 +553,22 @@ const char *tdb_name(const struct tdb_context *tdb)
 
 int64_t tdb_get_seqnum(struct tdb_context *tdb)
 {
-	tdb_off_t off = tdb_read_off(tdb, offsetof(struct tdb_header, seqnum));
+	tdb_off_t off;
+
+	if (tdb->flags & TDB_VERSION1) {
+		tdb1_off_t val;
+		tdb->last_error = TDB_SUCCESS;
+		val = tdb1_get_seqnum(tdb);
+
+		if (tdb->last_error != TDB_SUCCESS)
+			return TDB_ERR_TO_OFF(tdb->last_error);
+		else
+			return val;
+	}
+
+	off = tdb_read_off(tdb, offsetof(struct tdb_header, seqnum));
 	if (TDB_OFF_IS_ERR(off))
-		tdb->last_error = off;
+		tdb->last_error = TDB_OFF_TO_ERR(off);
 	else
 		tdb->last_error = TDB_SUCCESS;
 	return off;
@@ -499,3 +579,64 @@ int tdb_fd(const struct tdb_context *tdb)
 {
 	return tdb->file->fd;
 }
+
+struct traverse_state {
+	enum TDB_ERROR error;
+	struct tdb_context *dest_db;
+};
+
+/*
+  traverse function for repacking
+ */
+static int repack_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data,
+			   struct traverse_state *state)
+{
+	state->error = tdb_store(state->dest_db, key, data, TDB_INSERT);
+	if (state->error != TDB_SUCCESS) {
+		return -1;
+	}
+	return 0;
+}
+
+enum TDB_ERROR tdb_repack(struct tdb_context *tdb)
+{
+	struct tdb_context *tmp_db;
+	struct traverse_state state;
+
+	state.error = tdb_transaction_start(tdb);
+	if (state.error != TDB_SUCCESS) {
+		return state.error;
+	}
+
+	tmp_db = tdb_open("tmpdb", TDB_INTERNAL, O_RDWR|O_CREAT, 0, NULL);
+	if (tmp_db == NULL) {
+		state.error = tdb_logerr(tdb, TDB_ERR_OOM, TDB_LOG_ERROR,
+					 __location__
+					 " Failed to create tmp_db");
+		tdb_transaction_cancel(tdb);
+		return tdb->last_error = state.error;
+	}
+
+	state.dest_db = tmp_db;
+	if (tdb_traverse(tdb, repack_traverse, &state) < 0) {
+		goto fail;
+	}
+
+	state.error = tdb_wipe_all(tdb);
+	if (state.error != TDB_SUCCESS) {
+		goto fail;
+	}
+
+	state.dest_db = tdb;
+	if (tdb_traverse(tmp_db, repack_traverse, &state) < 0) {
+		goto fail;
+	}
+
+	tdb_close(tmp_db);
+	return tdb_transaction_commit(tdb);
+
+fail:
+	tdb_transaction_cancel(tdb);
+	tdb_close(tmp_db);
+	return state.error;
+}