linux-stable.git/fs/nfs/callback.h, branch linux-3.6.y

NFS: Convert v4 into a module

2012-07-30T23:06:52+00:00

This patch exports symbols needed by the v4 module.  In addition, I also
switch over to using IS_ENABLED() to check if CONFIG_NFS_V4 or
CONFIG_NFS_V4_MODULE are set.

The module (nfs4.ko) will be created in the same directory as nfs.ko and
will be automatically loaded the first time you try to mount over NFS v4.

Signed-off-by: Bryan Schumaker 
Signed-off-by: Trond Myklebust

NFSv4.1: Convert slotid from u8 to u32

2012-02-15T05:19:43+00:00

It is perfectly legal to negotiate up to 2^32-1 slots in the protocol,
and with 10GigE, we are already seeing that 255 slots is far too limiting.

Signed-off-by: Trond Myklebust

NFS: search for client session id in proper network namespace

2012-02-06T23:48:04+00:00

Network namespace is taken from request transport and passed as a part of
cb_process_state structure.

Signed-off-by: Stanislav Kinsbursky 
Signed-off-by: Trond Myklebust

NFS: add an endian notation

2012-01-12T21:29:51+00:00

This function returns a big endian value.  The implementation in
fs/nfs/callback_proc.c is declared with "__be32" but the .h file uses
"unsigned" instead.  It makes sparse complain:

fs/nfs/callback_proc.c:232:8: error:
	symbol 'nfs4_callback_layoutrecall' redeclared with different
	type (originally declared at fs/nfs/callback.h:165) - different
	base types

Signed-off-by: Dan Carpenter 
Signed-off-by: Trond Myklebust

NFSv4.1: Fix the callback 'highest_used_slotid' behaviour

2011-08-04T15:55:35+00:00

Currently, there is no guarantee that we will call nfs4_cb_take_slot() even
though nfs4_callback_compound() will consistently call
nfs4_cb_free_slot() provided the cb_process_state has set the 'clp' field.
The result is that we can trigger the BUG_ON() upon the next call to
nfs4_cb_take_slot().

This patch fixes the above problem by using the slot id that was taken in
the CB_SEQUENCE operation as a flag for whether or not we need to call
nfs4_cb_free_slot().
It also fixes an atomicity problem: we need to set tbl->highest_used_slotid
atomically with the check for NFS4_SESSION_DRAINING, otherwise we end up
racing with the various tests in nfs4_begin_drain_session().

Cc: stable@kernel.org [2.6.38+]
Signed-off-by: Trond Myklebust

pnfs: CB_NOTIFY_DEVICEID

2011-05-29T17:52:31+00:00

Note: This functionlaity is incomplete as all layout segments referring to
the 'to be removed device id' need to be reaped, and all in flight I/O drained.

[use be32 res in nfs4_callback_devicenotify]
[use nfs_client to qualify deviceid for cb_notify_deviceid]
[use global deviceid cache for CB_NOTIFY_DEVICEID]
[refactor device cache _lookup_deviceid]
[refactor device cache _find_get_deviceid]
Signed-off-by: Benny Halevy 
[Bug in new global-device-cache code]
[layout_driver MUST set free_deviceid_node if using dev-cache]
Signed-off-by: Boaz Harrosh 
Signed-off-by: Benny Halevy

NFS do not find client in NFSv4 pg_authenticate

2011-01-25T20:26:51+00:00

The information required to find the nfs_client cooresponding to the incoming
back channel request is contained in the NFS layer. Perform minimal checking
in the RPC layer pg_authenticate method, and push more detailed checking into
the NFS layer where the nfs_client can be found.

Signed-off-by: Andy Adamson 
Signed-off-by: Trond Myklebust

pnfs: update nfs4_callback_recallany to handle layouts

2011-01-06T19:46:32+00:00

While here, update the code a bit.

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

pnfs: CB_LAYOUTRECALL xdr code

2011-01-06T19:46:32+00:00

This is the xdr decoding for CB_LAYOUTRECALL.

Signed-off-by: Alexandros Batsakis 
Signed-off-by: Dean Hildebrand 
Signed-off-by: Marc Eshel 
Signed-off-by: Andy Adamson 
Signed-off-by: Benny Halevy 
Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS add session back channel draining

2011-01-06T19:46:25+00:00

Currently session draining only drains the fore channel.
The back channel processing must also be drained.

Use the back channel highest_slot_used to indicate that a callback is being
processed by the callback thread.  Move the session complete to be per channel.

When the session is draininig, wait for any current back channel processing
to complete and stop all new back channel processing by returning NFS4ERR_DELAY
to the back channel client.

Drain the back channel, then the fore channel.

Signed-off-by: Andy Adamson 
Signed-off-by: Trond Myklebust