From: Pavel Borzenkov <pborzen...@virtuozzo.com>
There is a loophole in the protocol that allows a client to send TRIM
request even if support for it wasn't negotiated with the server. State
explicitly that the client MUST NOT send such command without prior
successful negotiation.
Signed-off-by: Pavel Borzenkov <pborzen...@virtuozzo.com>
Reviewed-by: Roman Kagan <rka...@virtuozzo.com>
Signed-off-by: Denis V. Lunev <d...@openvz.org>
CC: Wouter Verhelst <w...@uter.be>
CC: Eric Blake <ebl...@redhat.com>
CC: Alex Bligh <a...@alex.org.uk>
---
doc/proto.md | 3 +++
1 file changed, 3 insertions(+)
diff --git a/doc/proto.md b/doc/proto.md
index 6d1cb34..d54ed19 100644
--- a/doc/proto.md
+++ b/doc/proto.md
@@ -471,6 +471,9 @@ The following request types exist:
about the contents of the export affected by this command, until
overwriting it again with `NBD_CMD_WRITE`.
+ A client MUST NOT send a trim request unless `NBD_FLAG_SEND_TRIM`
+ was set in the export flags field.
+
* Other requests
Some third-party implementations may require additional protocol
--
2.1.4
