Add a mechanism for the VFS layer to retry pathname resolution if a file
 system returns ESTALE at any point during the resolution process.  Pathname
 resolution is retried once from the first component, using all real lookup
 requests.

 This provides effective recovery for most cases where files or directories
 have been replaced by other remote file system clients.  It also provides
 a foundation to build a mechanism by which file system clients can fail
 over transparently to a replicated server.

 Test-plan:
 Combinations of rsync and "ls -l" on multiple clients.  No stale file handles
 should be after directory trees are replaced.  Standard performance tests;
 little or no loss of performance is expected.

 Created: Fri, 11 Feb 2005 16:46:19 -0500
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 The RPC client now reports the maximum payload size supported by the chosen
 transport method.  This is something a little less than 64KB for RPC over
 UDP, and about 2GB - 1 for RPC over TCP.  The effective rsize and wsize
 values are not allowed to exceed the reported maximum RPC payload size.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Remove broken_suid mount option (retry RPC after dropping privileges
upon EACCES): no longer used and questionable w.r.t. security.
Signed-off-by: Frank van Maarseveen <frankvm@frankvm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 This patch makes two needlessly global functions static.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 So we can distinguish between ENOMEM and EACCES errors.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 Ensure that credentials that are referenced by an RPC task, but that
 have been booted out of the credcache may still be refreshed.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

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

 gc_flavor is used only for looking up the security service, which is an
 integer value that never changes. Store the latter instead of the former.

 Fix up a couple of dodgy casts between gss_cred and rpc_cred. Replace them
 with the appropriate container_of().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 - Document the format of the gssd downcalls
 - Separate out "uid" field from rest of GSS context data struct
   since it will not be needed for the keyring-based contexts.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 Most existing servers do not implement RPCSEC_GSS for either the lockd or
 statd daemons.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 This makes for an interesting situation in which programs compiled
 to use flock() and running on the server will not see the locks that
 are set by the clients. The clients will, however, see both POSIX and
 flock() locks set by other clients.

 It is the best you can do, given the limitations of the protocol.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

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

 AUTH_UNIX credentials really only depend on the process uid/gid/groups
 information. In particular there is no dependency on any strict rpc_client
 specific information. Might as well share them all between all RPC clients.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 There is only one AUTH_NULL "credential".
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 This will make initialization of statically allocated caches simpler.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 The cr_auth field is currently used only in order to figure out the name
 of the credential's flavour in debugging printks. Replace with a dedicated
 pointer in the statically allocated rpc_credops instead.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

  Some RPC authentication flavours are not related to the uid (AUTH_NULL
  springs to mind). This patch moves control over the caching mechanism
  into the auth-specific code.

  Also ensure that expired creds are removed from the cache.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 Move the initialization of auth->au_count into the flavour-specific code.
 Move the kfree(auth) into the flavour-specific code.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 The sunrpc module itself is referenced by other sources, so only the
 auth_gss credcaches need to increment their module refcount.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 Sun's RPC library portmap client therefore defaults to AUTH_UNIX. Change our
 in-kernel client to follow that convention.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

 RPC call async is supposed to return an error if and only if
 it failed to run the rpc_task.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 Currently, if we restart an RPC call after having set an RPC delay (for
 instance in the case where an NFS EJUKEBOX error has occurred) the call
 to rpc_delete_timer() at the top of the rpc_execute() loop will
 kill off our timer.

 This patch causes rpc_delete_timer() to detect if the rpc_task is still
 queued on a wait queue, and refuse to delete the timer if this is the case.

 Problem diagnosed by Jan Sanislo and Olaf Kirch.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

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

 Fix a bug whereby we are failing to test for permissions on opendir().
 Optimize away permissions checks that request MAY_WRITE on directories.
 Ensure that VFS sets LOOKUP_CONTINUE before calling permission().
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

Use CONFIG_64BIT everywhere instead.
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Indentation and header file ordering
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The EISA EEPROM driver was being initialised too early, before miscdevs
can be registered.  But EISA needs to be registered early -- before PCI.
So stash the EEPROM address in a global variable at EISA init time,
then pick it up later in the EISA EEPROM driver.

Also ioremap() it, use readb instead of gsc_readb and rename the
miscdev to not have a space in the name.
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

There can be only one Asp in the machine, so allocate its controller
structure statically.
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Ditch ccio_mem_ratio. "Ported" from similar change to sba driver.

From: Joel Soete <soete.joel@tiscali.be>
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

 - PCI_DMA_BUS_IS_PHYS is only true if we don't have an IOMMU.  Getting this
   wrong results in system panics when we run out of bounce buffers.
 - parisc_vmerge_boundary and parisc_vmerge_max_size need to be available on
   all machines, not just ones with GSC.
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

_dbg_write_trylock() needs to return an int.
Also update Thibaut's email address
Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>