Clean up a lot of ad-hoc page length calculations in fs/nfs/write.c
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

This will allow fast lookup of the nfs_page from the struct page instead of
having to search the radix tree.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Allow callers to directly pass it a struct writeback_control.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Pass down struct writeback control.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Make it take a struct writepages argument, and rename to
nfs_flush_mapping().
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Change the location where the rpc_xprt structure is allocated so each
transport implementation can allocate a private area from the same
chunk of memory.

Note also that xprt->ops->destroy, rather than xprt_destroy, is now
responsible for freeing rpc_xprt when the transport is destroyed.

Test plan:
Connectathon.
Signed-off-by: NChuck Lever <chuck.lever@oracle.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Move the xid field in the rpc_xprt structure to be in the same cache line
as the reserve_lock, since these are used at the same time.

Test plan:
None.
Signed-off-by: NChuck Lever <chuck.lever@oracle.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

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

Also clean up the code...
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

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

Converts various integer buffer offsets and sizes to unsigned integer.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Remove use of the Big Kernel Lock around indirect calls to
nfs3_proc_readlink and nfs4_proc_readlink, both of which
basically call rpc_call_sync.
Signed-off-by: NFrank Filz <ffilz@us.ibm.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Remove use of the Big Kernel Lock around calls to rpc_call_sync.
Signed-off-by: NFrank Filz <ffilz@us.ibm.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Remove use of the Big Kernel Lock around calls to rpc_execute.
Signed-off-by: NFrank Filz <ffilz@us.ibm.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

All internal RPC client operations should no longer depend on the BKL,
however lockd and NFS callbacks may still require it.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

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

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

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

Currently nfs_sync_inode_wait() will fail to loop correctly when we call
nfs_sync_inode_wait with the FLUSH_INVALIDATE argument.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

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

We must always call ->read_done() before we truncate the page data, or
decide to flag an error. The reasons are that
	in NFSv2, ->read_done() is where the eof flag gets set.
	in NFSv3/v4 ->read_done() handles EJUKEBOX-type errors, and
		  v4 state recovery.

However, we need to mark the pages as uptodate before we deal with short
read errors, since we may need to modify the nfs_read_data arguments.

We therefore split the current nfs_readpage_result() into two parts:
nfs_readpage_result(), which calls ->read_done() etc, and
nfs_readpage_retry(), which subsequently handles short reads.

Note: Removing the code that retries in case of a short read also fixes a
bug in nfs_direct_read_result(), which used to return a corrupted number of
bytes.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

When trying to open a file with the O_EXCL flag over NFS on a server that does
not support exclusive mode, the file does not open.  The reason,
rpc_call_sync returns a errno number, and not the nfs error number.  I fixed
it by changing the status check in nfs3proc.c.  Either this is how it should
be fixed, or rpc_call_sync should be fixed to return the NFS error.
Signed-off-by: NAndy Ryan <genanr@allantgroup.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

Use RCU to ensure that we can safely call rpc_finish_wakeup after we've
called __rpc_do_wake_up_task. If not, there is a theoretical race, in which
the rpc_task finishes executing, and gets freed first.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

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

The sunrpc scheduler contains a race condition that can let an RPC
task end up being neither running nor on any wait queue. The race takes
place between rpc_make_runnable (called from rpc_wake_up_task) and
__rpc_execute under the following condition:

First __rpc_execute calls tk_action which puts the task on some wait
queue. The task is dequeued by another process before __rpc_execute
continues its execution. While executing rpc_make_runnable exactly after
setting the task `running' bit and before clearing the `queued' bit
__rpc_execute picks up execution, clears `running' and subsequently
both functions fall through, both under the false assumption somebody
else took the job.

Swapping rpc_test_and_set_running with rpc_clear_queued in
rpc_make_runnable fixes that hole. This introduces another possible
race condition that can be handled by checking for `queued' after
setting the `running' bit.

Bug noticed on a 4-way x86_64 system under XEN with an NFSv4 server
on the same physical machine, apparently one of the few ways to hit
this race condition at all.

Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: NChristophe Saout <christophe@saout.de>
Signed-off-by: NTrond Myklebust <trond.myklebust@fys.uio.no>

* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (73 commits)
  [SCSI] aic79xx: Add ASC-29320LPE ids to driver
  [SCSI] stex: version update
  [SCSI] stex: change wait loop code
  [SCSI] stex: add new device type support
  [SCSI] stex: update device id info
  [SCSI] stex: adjust default queue length
  [SCSI] stex: add value check in hard reset routine
  [SCSI] stex: fix controller_info command handling
  [SCSI] stex: fix biosparam calculation
  [SCSI] megaraid: fix MMIO casts
  [SCSI] tgt: fix undefined flush_dcache_page() problem
  [SCSI] libsas: better error handling in sas_expander.c
  [SCSI] lpfc 8.1.11 : Change version number to 8.1.11
  [SCSI] lpfc 8.1.11 : Misc Fixes
  [SCSI] lpfc 8.1.11 : Add soft_wwnn sysfs attribute, rename soft_wwn_enable
  [SCSI] lpfc 8.1.11 : Removed decoding of PCI Subsystem Id
  [SCSI] lpfc 8.1.11 : Add MSI (Message Signalled Interrupts) support
  [SCSI] lpfc 8.1.11 : Adjust LOG_FCP logging
  [SCSI] lpfc 8.1.11 : Fix Memory leaks
  [SCSI] lpfc 8.1.11 : Fix lpfc_multi_ring_support
  ...

* master.kernel.org:/pub/scm/linux/kernel/git/brodo/pcmcia-2.6:
  [PATCH] pcmcia: at91_cf update
  [PATCH] pcmcia: fix m32r_cfc.c compilation
  [PATCH] pcmcia: ds.c debug enhancements
  [PATCH] pcmcia: at91_cf update
  [PATCH] pcmcia: conf.ConfigBase and conf.Present consolidation
  [PATCH] pcmcia: remove prod_id indirection
  [PATCH] pcmcia: remove manf_id and card_id indirection
  [PATCH] pcmcia: IDs for Elan serial PCMCIA devcies
  [PATCH] pcmcia: allow for four multifunction subdevices
  [PATCH] pcmcia: handle __copy_from_user() return value in ioctl
  [PATCH] pcmcia: multifunction card handling fixes
  [PATCH] pcmcia: allow shared IRQs on pd6729 sockets
  [PATCH] pcmcia: start over after CIS override
  [PATCH] cm4000_cs: fix return value check
  [PATCH] pcmcia: yet another IDE ID
  [PATCH] pcmcia: Add an id to ide-cs.c

Simple patch to add the new PCIe version of the 29320 card.

Signed-off: Mark Salyzyn <Mark_Salyzyn@adaptec.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Update version to 3.1.0.1
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

The original wait loop may be much longer than intended time.
Use more accurate timer_after for it. Also adjust wait value to
avoid unnecessary long waiting.
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Add support for st_vsc1 type device (st_vsc is ok because it does not
require extra buffer).
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

- add comments for various devices
- remove unused device ids(0xf350, 0x4301, 0x8301, 0x8302)
- add new device id(0xe350)
- fix vendor id of st_vsc
- modify Kconfig help info
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Firmware of new version may adjust default queue length. It is
backward compatible.
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

During hard reset, an all-1 value from PCI_COMMAND should be invalid.
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This command needs information from both firmware and driver. First copy
information from firmware to buffer, then fill in driver information.
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Fix biosparam calculation.
Signed-off-by: NEd Lin <ed.lin@promise.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

megaraid's MMIO RD*/WR* macros directly call readl() and writel() with
an 'unsigned long' argument.  This throws a warning, but is otherwise OK
because the 'unsigned long' is really the result of ioremap().  This
setup is also OK because the variable can hold an ioremap cookie /or/ a
PCI I/O port (PIO).

However, to fix the warning thrown when readl() and writel() are passed
an unsigned long cookie, I introduce 'void __iomem *mmio_base', holding
the same value as 'base'.  This will silence the warnings, and also
cause an oops whenever these MMIO-only functions are ever accidentally
passed an I/O address.
Signed-off-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/scsi_tgt_if.c: In function 'tgt_uspace_send_event':
drivers/scsi/scsi_tgt_if.c:88: warning: implicit declaration of function 'flush_dcache_page'
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

CONFIG_LBD and CONFIG_LSF are spread into asm/types.h for no particularly
good reason.

Centralising the definition in linux/types.h means that arch maintainers
don't need to bother adding it, as well as fixing the problem with
x86-64 users being asked to make a decision that has absolutely no
effect.

The H8/300 porters seem particularly confused since I'm not aware of any
microcontrollers that need to support 2TB filesystems.
Signed-off-by: NMatthew Wilcox <matthew@wil.cx>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

* 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block:
  [PATCH] blktrace: don't return blktrace_seq from trace_note()
  [PATCH] blktrace: uninline trace_note()