This is the 3rd attempt at this patchset. It's basically the same as the
earlier ones, with a few bugfixes. It's also more careful to make cifsd
use GFP_NOFS allocations to prevent deadlocks. For those who haven't
been following along at home:
This patchset does a fairly major cleanup and overhaul of the receive
codepath for cifs. Aside from basic cleanup, there are two main goals:
1) allow the receive codepath to identify the mid before receiving all
of the data for a particular SMB.
...and in turn...
2) add the ability for certain calls to receive responses into their
own set of buffers.
These two changes allow cifs to break the CIFSMaxBufSize barrier for
receives on certain calls (namely, reads). A separate patchset will
follow that will overhaul cifs_readpages to use this infrastructure to
allow for a larger rsize.
These patches take an incremental approach to changes in this code. I
feel that's essential as bugs in the receive path can be very subtle and
hard to detect. Being able to bisect to find bugs is a generally a good
thing. Hence, I highly recommend committing these in order.
Jeff Layton (16):
cifs: clean up checkSMB
cifs: consolidate signature generating code
cifs: trivial: remove obsolete comment
cifs: make smb_msg local to read_from_socket
cifs: check for unresponsive server every time we call kernel_recvmsg
cifs: simplify read_from_socket
cifs: turn read_from_socket into a wrapper around a vectorized
version
cifs: keep a reusable kvec array for receives
cifs: clean up check_rfc1002_header
cifs: add a third receive phase to cifs_demultiplex_thread
cifs: move mid finding into separate routine
cifs: eliminate is_multi_rsp parm to find_cifs_mid
cifs: move buffer pointers into TCP_Server_Info
cifs: find mid earlier in receive codepath
cifs: break out 3rd receive phase into separate function
cifs: add a callback function to receive the rest of the frame
fs/cifs/cifsencrypt.c | 103 ++--------
fs/cifs/cifsglob.h | 29 +++-
fs/cifs/cifsproto.h | 7 +-
fs/cifs/cifssmb.c | 5 +-
fs/cifs/connect.c | 519 ++++++++++++++++++++++++++++---------------------
fs/cifs/misc.c | 51 +++---
fs/cifs/transport.c | 16 +-
7 files changed, 391 insertions(+), 339 deletions(-)
--
1.7.6
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