Ensure that we don't attempt to lock the FileRef twice, which causes a deadlock. Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>

Signed-off-by: Jeff Lindsay <progrium@gmail.com>

EOF is indicated by a zero-length result with no error, so ensure that io.EOF does not ever get returned by Readdir.Read. Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>

Ensure that the server only logs in exceptional cases and prefixes each log line with the package name. Signed-off-by: Jonathan Rudenberg <jonathan@titanous.com>

build: add 1.8 and tip to travis build

Signed-off-by: Stephen J Day <stephen.day@docker.com>

encoding: clean up unit tests

channel: truncate twrite messages based on msize

Signed-off-by: Stephen J Day <stephen.day@docker.com>

While there are a few problems around handling of msize, the easiest to address and, arguably, the most problematic is that of Twrite. We now truncate Twrite.Data to the correct length if it will overflow the msize limit negotiated on the session. ErrShortWrite is returned by the `Session.Write` method if written data is truncated. In addition, we now reject incoming messages from `ReadFcall` that overflow the msize. Such messages are probably terminal in practice, but can be detected with the `Overflow` function. Tread is also handled accordingly, such that the Count field will be rewritten such that the response doesn't overflow the msize. Signed-off-by: Stephen J Day <stephen.day@docker.com>

p9p: use new context package throughout

Signed-off-by: Stephen J Day <stephen.day@docker.com>

Fixes the MSize comparison when negociating msize with server

Signed-off-by: Simon Ferquel <simon.ferquel@docker.com>

Specify type for all constants, not just the first