From 1486d04a1b41093e5f97f20ca7397e01df055f49 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 21 Oct 2011 13:17:14 +0200 Subject: nbd: add support for NBD_CMD_FLUSH Signed-off-by: Paolo Bonzini --- nbd.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'nbd.c') diff --git a/nbd.c b/nbd.c index c597d4733f..4fd0f4ed28 100644 --- a/nbd.c +++ b/nbd.c @@ -203,7 +203,8 @@ int nbd_negotiate(int csock, off_t size, uint32_t flags) 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 | NBD_FLAG_SEND_FUA); + flags | NBD_FLAG_HAS_FLAGS | NBD_FLAG_SEND_FLUSH | + NBD_FLAG_SEND_FUA); memset(buf + 28, 0, 124); if (write_sync(csock, buf, sizeof(buf)) != sizeof(buf)) { @@ -710,6 +711,18 @@ int nbd_trip(BlockDriverState *bs, int csock, off_t size, uint64_t dev_offset, TRACE("Request type is DISCONNECT"); errno = 0; return 1; + case NBD_CMD_FLUSH: + TRACE("Request type is FLUSH"); + + ret = bdrv_flush(bs); + if (ret < 0) { + LOG("flush failed"); + reply.error = -ret; + } + + if (nbd_send_reply(csock, &reply) == -1) + return -1; + break; default: LOG("invalid request type (%u) received", request.type); errno = EINVAL; -- cgit v1.2.1