[Tarantool-patches] [PATCH v2 4/7] qsync: provide a binary form of CONFIRM/ROLLBACK entries
Cyrill Gorcunov
gorcunov at gmail.com
Thu Jul 23 15:29:39 MSK 2020
These msgpack entries will be needed to write them
down to a journal without involving txn engine.
Signed-off-by: Cyrill Gorcunov <gorcunov at gmail.com>
---
src/box/iproto_constants.h | 27 +++++++++++++++++++++++++++
src/box/xrow.c | 23 ++++++++---------------
2 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/src/box/iproto_constants.h b/src/box/iproto_constants.h
index 6b850f101..1e6566e0f 100644
--- a/src/box/iproto_constants.h
+++ b/src/box/iproto_constants.h
@@ -328,6 +328,33 @@ iproto_type_is_synchro_request(uint32_t type)
return type == IPROTO_CONFIRM || type == IPROTO_ROLLBACK;
}
+/** CONFIRM/ROLLBACK entries encoded in MsgPack. */
+struct PACKED request_synchro_body {
+ uint8_t m_body;
+ uint8_t k_replica_id;
+ uint8_t m_replica_id;
+ uint32_t v_replica_id;
+ uint8_t k_lsn;
+ uint8_t m_lsn;
+ uint64_t v_lsn;
+};
+
+/**
+ * Creates CONFIRM/ROLLBACK entry.
+ */
+static inline void
+request_synchro_body_create(struct request_synchro_body *body,
+ uint32_t replica_id, int64_t lsn)
+{
+ body->m_body = 0x80 | 2;
+ body->k_replica_id = IPROTO_REPLICA_ID;
+ body->m_replica_id = 0xce;
+ body->v_replica_id = mp_bswap_u32(replica_id);
+ body->k_lsn = IPROTO_LSN;
+ body->m_lsn = 0xcf;
+ body->v_lsn = mp_bswap_u64(lsn);
+}
+
/** This is an error. */
static inline bool
iproto_type_is_error(uint32_t type)
diff --git a/src/box/xrow.c b/src/box/xrow.c
index 0c797a9d5..c2f4ba40a 100644
--- a/src/box/xrow.c
+++ b/src/box/xrow.c
@@ -897,26 +897,19 @@ static int
xrow_encode_confirm_rollback(struct xrow_header *row, struct region *region,
uint32_t replica_id, int64_t lsn, int type)
{
- size_t len = mp_sizeof_map(2) + mp_sizeof_uint(IPROTO_REPLICA_ID) +
- mp_sizeof_uint(replica_id) + mp_sizeof_uint(IPROTO_LSN) +
- mp_sizeof_uint(lsn);
- char *buf = (char *)region_alloc(region, len);
- if (buf == NULL) {
- diag_set(OutOfMemory, len, "region_alloc", "buf");
+ struct request_synchro_body *body;
+
+ body = region_alloc(region, sizeof(*body));
+ if (body == NULL) {
+ diag_set(OutOfMemory, sizeof(*body), "region_alloc", "body");
return -1;
}
- char *pos = buf;
-
- pos = mp_encode_map(pos, 2);
- pos = mp_encode_uint(pos, IPROTO_REPLICA_ID);
- pos = mp_encode_uint(pos, replica_id);
- pos = mp_encode_uint(pos, IPROTO_LSN);
- pos = mp_encode_uint(pos, lsn);
+ request_synchro_body_create(body, replica_id, lsn);
memset(row, 0, sizeof(*row));
- row->body[0].iov_base = buf;
- row->body[0].iov_len = len;
+ row->body[0].iov_base = (void *)body;
+ row->body[0].iov_len = sizeof(*body);
row->bodycnt = 1;
row->type = type;
--
2.26.2
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