Move the common code for setting up the nfs_write_data and nfs_read_data
structures into fs/nfs/read.c, fs/nfs/write.c and fs/nfs/direct.c.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

In preparation for the removal of rpc_call_setup().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

To ensure that the RPCSEC_GSS upcall is performed with the correct sigmask.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

We want the default scheduling priority (priority == 0) to remain
RPC_PRIORITY_NORMAL.

Also ensure that the priority wait queue scheduling is per process id
instead of sometimes being per thread, and sometimes being per inode.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Make it use the new task initialiser structure instead of acting as a
wrapper.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

The sunrpc client exports are not meant to be part of any official kernel
API: they can change at the drop of a hat. Mark them as internal functions
using EXPORT_SYMBOL_GPL.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Do this for all RPC client related functions and XDR functions.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Add kerneldoc comments for the rpc_pipefs.c functions that are exported.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

If we've disconnected from the server, rather than the other way round,
then it makes little sense to wait 3 seconds before reconnecting.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

xprt_disconnect() should really only be called when the transport shutdown
is completed, and it is time to wake up any pending tasks. Rename it to
xprt_disconnect_done() in order to reflect the semantical change.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Move the calls to xprt_disconnect() over to xprt_force_disconnect() in
order to enable the transport layer to manage the state of the
XPRT_CONNECTED flag.
Ditto in xs_tcp_read_fraghdr().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

The transport layer should do that itself whenever appropriate.

Note that the RDMA transport already assumes that it needs to call
xprt_disconnect in xprt_rdma_close().
For TCP sockets, we want to call xprt_disconnect() only after the
connection has been closed by both ends.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

By using shutdown() rather than close() we allow the RPC client to wait
for the TCP close handshake to complete before we start trying to reconnect
using the same port.
We use shutdown(SHUT_WR) only instead of shutting down both directions,
however we wait until the server has closed the connection on its side.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Add an xprt->state bit to enable the TCP ->state_change() method to signal
whether or not the TCP connection is in the process of closing down.
This will to be used by the reconnection logic in a separate patch.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Currently the TCP rebinding logic assumes that if we're not using a
reserved port, then we don't need to reconnect on the same port if a
disconnection event occurs. This breaks most RPC duplicate reply cache
implementations.

Also take into account the fact that xprt_min_resvport and
xprt_max_resvport may change while we're reconnecting, since the user may
change them at any time via the sysctls. Ensure that we check the port
boundaries every time we loop in xs_bind4/xs_bind6. Also ensure that if the
boundaries change, we only scan the ports a maximum of 2 times.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

When scheduling the autoclose RPC call, we want to ensure that we don't
race against the test_bit() call in xprt_clear_locked().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Added an active/deactive mechanism to the nfs_server structure
allowing async operations to hold off umount until the
operations are done.
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Reduce the time spent locking the rpc_sequence structure by queuing the
nfs_seqid only when we are ready to take the lock (when calling
nfs_wait_on_sequence).
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Ensure that we set/clear NFS_PAGE_TAG_LOCKED when the nfs_page is hashed.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

The current model locks the page twice for no good reason. Optimise by
inlining the parts of nfs_write_begin()/nfs_write_end() that we care about.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

If the server returns an ENOENT error, we still need to do a d_delete() in
order to ensure that the dentry is deleted.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

In nfs_do_call_unlink() we check that we haven't raced, and that lookup()
hasn't created an aliased dentry to our sillydeleted dentry. If somebody
has deleted the file on the server and the lookup() resulted in a negative
dentry, then ignore...
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Ensure that readdir revalidates its data cache after blocking on
sillyrename.

Also fix a typo in nfs_do_call_unlink(): swap the ^= for an |=. The result
is the same, since we've already checked that the flag is unset, but it
makes the code more readable.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

The new e1000e driver is apparently not yet suitable for general use, so
mark it experimental, and re-instate all the PCI-Express device IDs in
the old and stable e1000 driver so that people (namely me) can continue
to use a driver that actually works.

Auke & co have been appraised of the situation.

Cc: Auke Kok <auke-jan.h.kok@intel.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

A bug report on nfsd that states that since it was switched to use
splice instead of sendfile, the atime was no longer being updated
on the input file. do_generic_mapping_read() does this when accessing
the file, make splice do it for the direct splice handler.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

For BLOCK_PC requests, we need that length for completing the request.
Andrew Vasquez <andrew.vasquez@qlogic.com> reported the following
oops

Hitting a consistent BUG() with recent Linus' linux-2.6.git:

	[   12.941428] ------------[ cut here ]------------
	[   12.944874] kernel BUG at drivers/block/cciss.c:1260!
	[   12.944874] invalid opcode: 0000 [1] SMP
	[   12.944874] CPU 0
	[   12.944874] Modules linked in:
	[   12.944874] Pid: 0, comm: swapper Not tainted 2.6.24 #43
	[   12.944874] RIP: 0010:[<ffffffff8039e43d>]  [<ffffffff8039e43d>] cciss_softirq_done+0xbc/0x1bf
	[   12.944874] RSP: 0018:ffffffff8063aed0  EFLAGS: 00010202
	[   12.944874] RAX: 0000000000000001 RBX: ffff8100cf800010 RCX: ffff81042f1253b0
	[   12.944874] RDX: ffff81042de398f0 RSI: ffff81042de398f0 RDI: 0000000000000001
	[   12.944874] RBP: ffff81042daa0000 R08: ffff81042f1253b0 R09: 0000000000000001
	[   12.944874] R10: 00000000000000fe R11: 0000000000000000 R12: 0000000000000002
	[   12.944874] R13: 0000000000000001 R14: ffff8100cf800000 R15: ffff81042de398f0
	[   12.944874] FS:  0000000000000000(0000) GS:ffffffff805bb000(0000) knlGS:0000000000000000
	[   12.944874] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
	[   12.944874] CR2: 00002afed7eea340 CR3: 000000042dbba000 CR4: 00000000000006e0
	[   12.944874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
	[   12.944874] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
	[   12.944874] Process swapper (pid: 0, threadinfo ffffffff805f4000, task ffffffff805624a0)
	[   12.944874] Stack:  0000000000000000 ffffffff8063af10 0000000000000001 ffffffff80632d60
	[   12.944874]  0000000000000000 000000000000000a ffffffff805bb900 ffffffff8032038f
	[   12.944874]  ffffffff8063af10 ffffffff8063af10 ffffffff805bb940 ffffffff802346b4
	[   12.944874] Call Trace:
	[   12.944874]  <IRQ>  [<ffffffff8032038f>] blk_done_softirq+0x69/0x78
	[   12.944874]  [<ffffffff802346b4>] __do_softirq+0x6f/0xd8
	[   12.944874]  [<ffffffff8020c45c>] call_softirq+0x1c/0x30
	[   12.944874]  [<ffffffff8020e347>] do_softirq+0x30/0x80
	[   12.944874]  [<ffffffff8020e409>] do_IRQ+0x72/0xd9
	[   12.944874]  [<ffffffff8020a50a>] mwait_idle+0x0/0x46
	[   12.944874]  [<ffffffff8020a3da>] default_idle+0x0/0x3d
	[   12.944874]  [<ffffffff8020b7e1>] ret_from_intr+0x0/0xa
	[   12.944874]  <EOI>  [<ffffffff8020a54c>] mwait_idle+0x42/0x46
	[   12.944874]  [<ffffffff8020a481>] cpu_idle+0x6a/0xae
	[   12.944874]
	[   12.944874]
	[   12.944874] Code: 0f 0b eb fe 48 8d 85 d8 c0 00 00 48 89 04 24 48 89 c7 e8 e5
	[   12.944874] RIP  [<ffffffff8039e43d>] cciss_softirq_done+0xbc/0x1bf
	[   12.944874]  RSP <ffffffff8063aed0>
	[   12.944903] ---[ end trace e9c631603f90d22f ]---

which is caused by blk_end_request() returning 'not done' for a request,
since it gets asked to complete zero bytes.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Expose hardware sector size in sysfs queue directory.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

request_queue_t is deprecated
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

struct io_context was not defined, just add an empty forward decl.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Adds files for barrier handling, rq execution, io context handling,
mapping data to requests, and queue settings.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Seperates the tag and sysfs handling from ll_rw_blk.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

Then we retain history in blk-core.c
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>