linux-toradex.git/net/sunrpc/xprt.c, branch v2.6.22.6

SUNRPC: introduce rpcbind: replacement for in-kernel portmapper

2007-05-01T05:17:12+00:00

Introduce a replacement for the in-kernel portmapper client that supports
all 3 versions of the rpcbind protocol.  This code is not used yet.

Original code by Groupe Bull updated for the latest kernel, with multiple
bug fixes.

Note that rpcb_clnt.c does not yet support registering via versions 3 and
4 of the rpcbind protocol.  That is planned for a later patch.

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

SUNRPC: Eliminate side effects from rpc_malloc

2007-05-01T05:17:11+00:00

Currently rpc_malloc sets req->rq_buffer internally.  Make this a more
generic interface:  return a pointer to the new buffer (or NULL) and
make the caller set req->rq_buffer and req->rq_bufsize.  This looks much
more like kmalloc and eliminates the side effects.

To fix a potential deadlock, this patch also replaces GFP_NOFS with
GFP_NOWAIT in rpc_malloc.  This prevents async RPCs from sleeping outside
the RPC's task scheduler while allocating their buffer.

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

SUNRPC: RPC buffer size estimates are too large

2007-05-01T05:17:10+00:00

The RPC buffer size estimation logic in net/sunrpc/clnt.c always
significantly overestimates the requirements for the buffer size.
A little instrumentation demonstrated that in fact rpc_malloc was never
allocating the buffer from the mempool, but almost always called kmalloc.

To compute the size of the RPC buffer more precisely, split p_bufsiz into
two fields; one for the argument size, and one for the result size.

Then, compute the sum of the exact call and reply header sizes, and split
the RPC buffer precisely between the two.  That should keep almost all RPC
buffers within the 2KiB buffer mempool limit.

And, we can finally be rid of RPC_SLACK_SPACE!

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

RPC: Fix the TCP resend semantics for NFSv4

2007-04-21T05:56:30+00:00

Fix a regression due to the patch "NFS: disconnect before retrying NFSv4
requests over TCP"

The assumption made in xprt_transmit() that the condition
	"req->rq_bytes_sent == 0 and request is on the receive list"
should imply that we're dealing with a retransmission is false.
Firstly, it may simply happen that the socket send queue was full
at the time the request was initially sent through xprt_transmit().
Secondly, doing this for each request that was retransmitted implies
that we disconnect and reconnect for _every_ request that happened to
be retransmitted irrespective of whether or not a disconnection has
already occurred.

Fix is to move this logic into the call_status request timeout handler.

Signed-off-by: Trond Myklebust 
Signed-off-by: Linus Torvalds

Merge branch 'master' of /home/trondmy/kernel/linux-2.6/

2007-02-13T06:43:25+00:00

Conflicts:

	net/sunrpc/auth_gss/gss_krb5_crypto.c
	net/sunrpc/auth_gss/gss_spkm3_token.c
	net/sunrpc/clnt.c

Merge with mainline and fix conflicts.

NFS: disconnect before retrying NFSv4 requests over TCP

2007-02-13T06:40:45+00:00

RFC3530 section 3.1.1 states an NFSv4 client MUST NOT send a request
twice on the same connection unless it is the NULL procedure.  Section
3.1.1 suggests that the client should disconnect and reconnect if it
wants to retry a request.

Implement this by adding an rpc_clnt flag that an ULP can use to
specify that the underlying transport should be disconnected on a
major timeout.  The NFSv4 client asserts this new flag, and requests
no retries after a minor retransmit timeout.

Note that disconnecting on a retransmit is in general not safe to do
if the RPC client does not reuse the TCP port number when reconnecting.

See http://bugzilla.linux-nfs.org/show_bug.cgi?id=6

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

[NET] SUNRPC: Fix whitespace errors.

2007-02-11T07:20:13+00:00

Signed-off-by: YOSHIFUJI Hideaki 
Signed-off-by: David S. Miller

SUNRPC: fix print format for tk_pid

2007-02-03T23:35:10+00:00

The tk_pid field is an unsigned short.  The proper print format specifier for
that type is %5u, not %4d.

Also clean up some miscellaneous print formatting nits.

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

Merge branch 'master' of /home/trondmy/kernel/linux-2.6/ into merge_linus

2006-12-07T20:48:15+00:00

Conflicts:

	include/linux/sunrpc/xprt.h
	net/sunrpc/xprtsock.c
Fix up conflicts with the workqueue changes.

SUNRPC: Remove pprintk() from net/sunrpc/xprt.c

2006-12-06T15:46:55+00:00

These appear to be deprecated.  Removing them also gets rid of some sparse
noise.

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