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linux/net/9p
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Greg Kurz 9a5861a3d5 9p/trans_virtio: discard zero-length reply 
commit 26d99834f8 upstream.

When a 9p request is successfully flushed, the server is expected to just
mark it as used without sending a 9p reply (ie, without writing data into
the buffer). In this case, virtqueue_get_buf() will return len == 0 and
we must not report a REQ_STATUS_RCVD status to the client, otherwise the
client will erroneously assume the request has not been flushed.

Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2018-06-16 22:22:12 +01:00
..
client.c net/9p: Switch to wait_event_killable() 2018-02-13 18:42:09 +00:00
error.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
Kconfig net/9p: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:39:33 -08:00
Makefile [net/9p] Preparation and helper functions for zero copy 2011-03-15 09:57:34 -05:00
mod.c 9p: Reduce object size with CONFIG_NET_9P_DEBUG 2012-01-05 10:51:44 -06:00
protocol.c 9p: Modify the stat structures to use kuid_t and kgid_t 2013-02-12 03:19:31 -08:00
protocol.h net/9p: Convert net/9p protocol dumps to tracepoints 2011-10-24 11:13:12 -05:00
trans_common.c 9p: fix off by one causing access violations and memory corruption 2013-07-11 11:36:02 -07:00
trans_common.h fs/9p: Update zero-copy implementation in 9p 2011-10-24 11:13:11 -05:00
trans_fd.c 9pnet: trans_fd : allocate struct p9_trans_fd and struct p9_conn together. 2014-03-25 16:38:17 -05:00
trans_rdma.c 9pnet_rdma: check token type before int conversion 2014-03-25 16:38:19 -05:00
trans_virtio.c 9p/trans_virtio: discard zero-length reply 2018-06-16 22:22:12 +01:00
util.c net/9p: convert to idr_alloc() 2013-02-27 19:10:20 -08:00