From 1dbfafed7f0478fde29de7b69692c4d58b9e6c25 Mon Sep 17 00:00:00 2001 From: Hitoshi Mitake Date: Mon, 11 Aug 2014 14:43:45 +0900 Subject: sheepdog: adopting protocol update for VDI locking The update is required for supporting iSCSI multipath. It doesn't affect behavior of QEMU driver but adding a new field to vdi request struct is required. Cc: Kevin Wolf Cc: Stefan Hajnoczi Cc: Liu Yuan Cc: MORITA Kazutaka Signed-off-by: Hitoshi Mitake Signed-off-by: Stefan Hajnoczi --- block/sheepdog.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'block/sheepdog.c') diff --git a/block/sheepdog.c b/block/sheepdog.c index 12cbd9dcb4..93c0266fea 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -103,6 +103,9 @@ #define SD_INODE_SIZE (sizeof(SheepdogInode)) #define CURRENT_VDI_ID 0 +#define LOCK_TYPE_NORMAL 0 +#define LOCK_TYPE_SHARED 1 /* for iSCSI multipath */ + typedef struct SheepdogReq { uint8_t proto_ver; uint8_t opcode; @@ -166,7 +169,8 @@ typedef struct SheepdogVdiReq { uint8_t copy_policy; uint8_t reserved[2]; uint32_t snapid; - uint32_t pad[3]; + uint32_t type; + uint32_t pad[2]; } SheepdogVdiReq; typedef struct SheepdogVdiRsp { @@ -1090,6 +1094,7 @@ static int find_vdi_name(BDRVSheepdogState *s, const char *filename, memset(&hdr, 0, sizeof(hdr)); if (lock) { hdr.opcode = SD_OP_LOCK_VDI; + hdr.type = LOCK_TYPE_NORMAL; } else { hdr.opcode = SD_OP_GET_VDI_INFO; } @@ -1793,6 +1798,7 @@ static void sd_close(BlockDriverState *bs) memset(&hdr, 0, sizeof(hdr)); hdr.opcode = SD_OP_RELEASE_VDI; + hdr.type = LOCK_TYPE_NORMAL; hdr.base_vdi_id = s->inode.vdi_id; wlen = strlen(s->name) + 1; hdr.data_length = wlen; -- cgit v1.2.3