linux.git/fs/nfs/callback.c, branch v2.6.35

SUNRPC: Bury "#ifdef IPV6" in svc_create_xprt()

2010-01-26T22:56:43+00:00

Clean up:  Bruce observed we have more or less common logic in each of
svc_create_xprt()'s callers:  the check to create an IPv6 RPC listener
socket only if CONFIG_IPV6 is set.  I'm about to add another case
that does just the same.

If we move the ifdefs into __svc_xpo_create(), then svc_create_xprt()
call sites can get rid of the "#ifdef" ugliness, and can use the same
logic with or without IPv6 support available in the kernel.

Signed-off-by: Chuck Lever 
Signed-off-by: J. Bruce Fields

nfs41: add support for callback with RPC version number 4

2009-12-05T18:19:01+00:00

The NFSv4.1 spec-29 (18.36.3) says that the server MUST use an ONC RPC
(program) version number equal to 4 in callbacks sent to the client.
For now we allow both versions 1 and 4.

Signed-off-by: Alexandros Batsakis 
Signed-off-by: Trond Myklebust

The rpc server does not require that service threads take the BKL.

2009-12-03T20:58:33+00:00

Signed-off-by: J. Bruce Fields 
Signed-off-by: Trond Myklebust

NFSv4: Clean up the nfs.callback_tcpport option

2009-08-09T19:06:19+00:00

Tighten up the validity checking in param_set_port: check for NULL pointers.
Ensure that the option shows up on 'modinfo' output.

Signed-off-by: Trond Myklebust

Merge branch 'devel-for-2.6.31' into for-2.6.31

2009-06-19T01:13:44+00:00

Conflicts:
	fs/nfs/client.c
	fs/nfs/super.c

NFS: Fix false error return from nfs_callback_up() if ipv6.ko is not available

2009-06-18T01:02:10+00:00

Clear "ret" if the error return from svc_create_xprt(AF_INET6) was
-EAFNOSUPORT.  Otherwise, callback start-up will succeed, but
nfs_callback_up() will return -EAFNOSUPPORT anyway, and the first
NFSv4 mount attempt after a reboot will fail.

Bug introduced by commit f738f517 in 2.6.30-rc1.

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

nfs41: Allow NFSv4 and NFSv4.1 callback services to coexist

2009-06-17T21:11:32+00:00

Tracks the nfs_callback_info for both versions, enabling the callback
service for v4 and v4.1 to run concurrently and be stopped independently
of each other.

Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy

nfs41: create a svc_xprt for nfs41 callback thread and use for incoming callbacks

2009-06-17T21:11:31+00:00

Signed-off-by: Benny Halevy

nfs41: Implement NFSv4.1 callback service process.

2009-06-17T21:11:29+00:00

nfs41_callback_up() initializes the necessary queues and creates the new
nfs41_callback_svc thread.  This thread executes the callback service which
waits for requests to arrive on the svc_serv->sv_cb_list.

NFS41_BC_MIN_CALLBACKS is set to 1 because we expect callbacks to not
cause substantial latency.

The actual processing of the callback will be implemented as a separate patch.

There is only one NFSv4.1 callback service.  The first caller of
nfs4_callback_up() creates the service, subsequent callers increment a
reference count on the service.  The service is destroyed when the last
caller invokes nfs_callback_down().

The transport needs to hold a reference to the callback service in order
to invoke it during callback processing.  Currently this reference is only
obtained when the service is first created.  This is incorrect, since
subsequent registrations for other transports will leave the xprt->serv
pointer uninitialized, leading to an oops when a callback arrives on
the "unreferenced" transport.

This patch fixes the problem by ensuring that a reference to the service
is saved in xprt->serv, either because the service is created by this
invocation to nfs4_callback_up() or by a prior invocation.

Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[nfs41: Add a reference to svc_serv during callback service bring up]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[Type check arguments of nfs_callback_up]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[nfs41: save svc_serv in nfs_callback_info]
Signed-off-by: Benny Halevy 
[Removal of ugly #ifdefs]
[nfs41: Update to removal of ugly #ifdefs]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy

nfs41: minorversion support for nfs4_{init,destroy}_callback

2009-06-17T20:06:01+00:00

move nfs4_init_callback into nfs4_init_client_minor_version
and nfs4_destroy_callback into nfs4_clear_client_minor_version

as these need to happen also when auto-negotiating the minorversion
once the callback service for nfs41 becomes different than for nfs4.0

Signed-off-by: Benny Halevy 
[nfs41: Fix checkpatch warning]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[Type check arguments of nfs_callback_up]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy 
[nfs41: Backchannel: Remove FIXME comment]
Signed-off-by: Ricardo Labiaga 
Signed-off-by: Benny Halevy