linux-toradex.git/include/linux/sunrpc, branch v2.6.35-rc3

SUNRPC: Don't spam gssd with upcall requests when the kerberos key expired

2010-05-14T19:09:37+00:00

Now that the rpc.gssd daemon can explicitly tell us that the key expired,
we should cache that information to avoid spamming gssd.

Signed-off-by: Trond Myklebust

SUNRPC: Reorder the struct rpc_task fields

2010-05-14T19:09:37+00:00

This improves the packing of the rpc_task, and ensures that on 64-bit
platforms the size reduces to 216 bytes.

Signed-off-by: Trond Myklebust

SUNRPC: Remove the 'tk_magic' debugging field

2010-05-14T19:09:36+00:00

It has not triggered in almost a decade. Time to get rid of it...

Signed-off-by: Trond Myklebust

SUNRPC: Move the task->tk_bytes_sent and tk_rtt to struct rpc_rqst

2010-05-14T19:09:36+00:00

It seems strange to maintain stats for bytes_sent in one structure, and
bytes received in another. Try to assemble all the RPC request-related
stats in struct rpc_rqst

Signed-off-by: Trond Myklebust

NFS: Don't use GFP_KERNEL in rpcsec_gss downcalls

2010-05-14T19:09:33+00:00

Again, we can deadlock if the memory reclaim triggers a writeback that
requires a rpcsec_gss credential lookup.

Signed-off-by: Trond Myklebust

SUNRPC: Replace jiffies-based metrics with ktime-based metrics

2010-05-14T19:09:33+00:00

Currently RPC performance metrics that tabulate elapsed time use
jiffies time values.  This is problematic on systems that use slow
jiffies (for instance 100HZ systems built for paravirtualized
environments).  It is also a problem for computing precise latency
statistics for advanced network transports, such as InfiniBand,
that can have round-trip latencies significanly faster than a single
clock tick.

For the RPC client, adopt the high resolution time stamp mechanism
already used by the network layer and blktrace: ktime.

We use ktime format time stamps for all internal computations, and
convert to milliseconds for presentation.  As a result, we need only
addition operations in the performance critical paths; multiply/divide
is required only for presentation.

We could report RTT metrics in microseconds.  In fact the mountstats
format is versioned to accomodate exactly this kind of interface
improvement.

For now, however, we'll stay with millisecond precision for
presentation to maintain backwards compatibility with the handful of
currently deployed user space tools.  At a later point, we'll move to
an API such as BDI_STATS where a finer timestamp precision can be
reported.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

SUNRPC: RPC metrics and RTT estimator should use same RTT value

2010-05-14T19:09:32+00:00

Compute an RPC request's RTT once, and use that value both for reporting
RPC metrics, and for adjusting the RTT context used by the RPC client's RTT
estimator algorithm.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

SUNRPC: Trivial cleanups in include/linux/sunrpc/xdr.h

2010-05-14T19:09:31+00:00

Clean up: Update the documenting comment, and fix some minor white
space issues.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

SUNRPC: Fail over more quickly on connect errors

2010-05-14T19:09:30+00:00

We should not allow soft tasks to wait for longer than the major timeout
period when waiting for a reconnect to occur.

Remove the field xprt->connect_timeout since it has been obsoleted by
xprt->reestablish_timeout.

Signed-off-by: Trond Myklebust

gss_krb5: Add support for rc4-hmac encryption

2010-05-14T19:09:20+00:00

Add necessary changes to add kernel support for the rc4-hmac Kerberos
encryption type used by Microsoft and described in rfc4757.

Signed-off-by: Kevin Coffman 
Signed-off-by: Steve Dickson 
Signed-off-by: Trond Myklebust