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-rw-r--r--nbd.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/nbd.c b/nbd.c
index 5b718b5973..c597d4733f 100644
--- a/nbd.c
+++ b/nbd.c
@@ -202,7 +202,8 @@ int nbd_negotiate(int csock, off_t size, uint32_t flags)
memcpy(buf, "NBDMAGIC", 8);
cpu_to_be64w((uint64_t*)(buf + 8), 0x00420281861253LL);
cpu_to_be64w((uint64_t*)(buf + 16), size);
- cpu_to_be32w((uint32_t*)(buf + 24), flags | NBD_FLAG_HAS_FLAGS);
+ cpu_to_be32w((uint32_t*)(buf + 24),
+ flags | NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_FUA);
memset(buf + 28, 0, 124);
if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) {
@@ -630,7 +631,7 @@ int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset,
reply.handle = request.handle;
reply.error = 0;
- switch (request.type) {
+ switch (request.type & NBD_CMD_MASK_COMMAND) {
case NBD_CMD_READ:
TRACE("Request type is READ");
@@ -692,6 +693,14 @@ int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset,
}
*offset += request.len;
+
+ if (request.type & NBD_CMD_FLAG_FUA) {
+ ret = bdrv_flush(bs);
+ if (ret < 0) {
+ LOG("flush failed");
+ reply.error = -ret;
+ }
+ }
}
if (nbd_send_reply(csock, &reply) == -1)