openwrt/staging/blogic.git
12 years agoNFSv4.1 send layoutreturn to fence disconnected data server
Andy Adamson [Fri, 27 Apr 2012 21:53:50 +0000 (17:53 -0400)]
NFSv4.1 send layoutreturn to fence disconnected data server

Let the MDS know that you are redirecting I/O from pNFS to MDS.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1 wake up all tasks on un-connected DS slot table waitq
Andy Adamson [Fri, 27 Apr 2012 21:53:49 +0000 (17:53 -0400)]
NFSv4.1 wake up all tasks on un-connected DS slot table waitq

The DS has a connection error (invalid deviceid). Drain the fore channel
slot table waitq.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1 Check invalid deviceid upon slot table waitq wakeup
Andy Adamson [Fri, 27 Apr 2012 21:53:48 +0000 (17:53 -0400)]
NFSv4.1 Check invalid deviceid upon slot table waitq wakeup

Tasks sleeping on the slot table waitq wake to the rpc_prepare_task state.
Reset the task for io through the MDS if the deviceid is invalid.

The reset functions put the io pages through the pageio layer which has the
advantage of re-coalescing which allows for the MDS and DS having different
r/wsizes. Exit the awakened task without executing the rpc_call_done routine.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1 remove nfs4_reset_write and nfs4_reset_read
Andy Adamson [Fri, 27 Apr 2012 21:53:47 +0000 (17:53 -0400)]
NFSv4.1 remove nfs4_reset_write and nfs4_reset_read

Replaced by filelayout_reset_write and filelayout_reset_read

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1: mark deviceid invalid on filelayout DS connection errors
Andy Adamson [Fri, 27 Apr 2012 21:53:46 +0000 (17:53 -0400)]
NFSv4.1: mark deviceid invalid on filelayout DS connection errors

This prevents the use of any layout for i/o that references the deviceid.
I/O is redirected through the MDS.

Redirect the unhandled failed I/O to the MDS without marking either the
layout or the deviceid invalid.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1 data server timeo and retrans module parameters
Andy Adamson [Fri, 27 Apr 2012 21:53:45 +0000 (17:53 -0400)]
NFSv4.1 data server timeo and retrans module parameters

Set the recovery parameters for data servers.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1 set RPC_TASK_SOFTCONN for filelayout DS RPC calls
Andy Adamson [Fri, 27 Apr 2012 21:53:44 +0000 (17:53 -0400)]
NFSv4.1 set RPC_TASK_SOFTCONN for filelayout DS RPC calls

RPC_TASK_SOFTCONN returns connection errors to the caller which allows the pNFS
file layout to quickly try the MDS or perhaps another DS.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1 cleanup filelayout invalid layout handling
Andy Adamson [Fri, 27 Apr 2012 21:53:43 +0000 (17:53 -0400)]
NFSv4.1 cleanup filelayout invalid layout handling

The invalid layout bits are should only be used to block LAYOUTGETs.

Do not invalidate a layout on deviceid invalidation.
Do not invalidate a layout on un-handled READ, WRITE, COMMIT errors.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4.1: cleanup filelayout invalid deviceid handling
Andy Adamson [Fri, 27 Apr 2012 21:53:42 +0000 (17:53 -0400)]
NFSv4.1: cleanup filelayout invalid deviceid handling

Move the invalid deviceid test into nfs4_fl_prepare_ds, called by the
filelayout read, write, and commit routines. NFS4_DEVICE_ID_NEG_ENTRY
is no longer needed.
Remove redundant printk's - filelayout_mark_devid_invalid prints a KERN_WARNING.

An invalid device prevents pNFS io.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoFixed goto readability in nfs_update_inode.
Matthew Treinish [Mon, 30 Apr 2012 15:32:57 +0000 (11:32 -0400)]
Fixed goto readability in nfs_update_inode.

Simplified error gotos to make it slightly easier to read,
it doesn't affect the functionality of the routine.

Signed-off-by: Matthew Treinish <treinish@linux.vnet.ibm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Fix a compile issue when CONFIG_NFS_FSCACHE was undefined
Trond Myklebust [Wed, 16 May 2012 17:21:30 +0000 (10:21 -0700)]
NFS: Fix a compile issue when CONFIG_NFS_FSCACHE was undefined

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agorpc_pipefs: clear write bit from top level rpc_pipefs directory
Jeff Layton [Wed, 16 May 2012 17:04:26 +0000 (13:04 -0400)]
rpc_pipefs: clear write bit from top level rpc_pipefs directory

We can't create new files or directories here from userspace, so let's
not pretend that this directory is writable.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Turn v3 on by default
Bryan Schumaker [Thu, 10 May 2012 20:47:20 +0000 (16:47 -0400)]
NFS: Turn v3 on by default

Most users will use NFS v3 or possibly v4 so this makes it easier for
them.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Make v2 configurable
Bryan Schumaker [Thu, 10 May 2012 20:47:19 +0000 (16:47 -0400)]
NFS: Make v2 configurable

With this patch NFS v2 can be disabled during Kconfig.  I default the
option to "y" to match the current behavior.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create an NFS v3 stat_to_errno()
Bryan Schumaker [Thu, 10 May 2012 20:47:18 +0000 (16:47 -0400)]
NFS: Create an NFS v3 stat_to_errno()

In theory, NFS v3 can have different error versions than NFS v2. v4 is
already using its own nfs4_stat_to_errno() to map error codes, so
rather than create something in the generic client for v2 and v3 to
share I instead give v3 its own function.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Pass mntfh as part of the nfs_mount_info structure
Bryan Schumaker [Thu, 10 May 2012 19:07:43 +0000 (15:07 -0400)]
NFS: Pass mntfh as part of the nfs_mount_info structure

This allows me to use the filehandle allocated in nfs_fs_mount() for nfs
v4 mounts instead of allocating a new one.  Rather than change
nfs4_mount() to look almost exactly like nfs_fs_mount(), I instead
remove the function.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Allocate parsed mount data directly to the nfs_mount_info structure
Bryan Schumaker [Thu, 10 May 2012 19:07:42 +0000 (15:07 -0400)]
NFS: Allocate parsed mount data directly to the nfs_mount_info structure

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a single nfs_validate_mount_data() function
Bryan Schumaker [Thu, 10 May 2012 19:07:41 +0000 (15:07 -0400)]
NFS: Create a single nfs_validate_mount_data() function

This new function chooses between the v2/3 parser and the v4 parser by
filesystem type.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a single function for text mount data
Bryan Schumaker [Thu, 10 May 2012 19:07:40 +0000 (15:07 -0400)]
NFS: Create a single function for text mount data

The v2/3 and v4 cases were very similar, with just a few parameters
changed.  This makes it easy to share code.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a new nfs_try_mount()
Bryan Schumaker [Thu, 10 May 2012 19:07:39 +0000 (15:07 -0400)]
NFS: Create a new nfs_try_mount()

This function returns the same same return type as nfs4_try_mount() so
they two can be more easily substituted.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Let mount data parsing set the NFS version
Bryan Schumaker [Thu, 10 May 2012 19:07:38 +0000 (15:07 -0400)]
NFS: Let mount data parsing set the NFS version

This field is unconditionally set while parsing mount data, so there is
no need to fill it in here.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Use nfs_fs_mount_common() for remote referral mounts
Bryan Schumaker [Thu, 10 May 2012 19:07:37 +0000 (15:07 -0400)]
NFS: Use nfs_fs_mount_common() for remote referral mounts

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Use nfs_fs_mount_common() for xdev mounts
Bryan Schumaker [Thu, 10 May 2012 19:07:36 +0000 (15:07 -0400)]
NFS: Use nfs_fs_mount_common() for xdev mounts

At this point, there are only a few small differences between these two
functions.  I can set a few function pointers in the nfs_mount_info
struct to get around these differences.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a common xdev_mount() function
Bryan Schumaker [Thu, 10 May 2012 19:07:35 +0000 (15:07 -0400)]
NFS: Create a common xdev_mount() function

The only difference between nfs_xdev_mount() and nfs4_xdev_mount() is the
clone_super() function called to clone the super block.  I can combine
these two functions by using the fill_super field in the mount_info
structure.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a common fs_mount() function
Bryan Schumaker [Thu, 10 May 2012 19:07:34 +0000 (15:07 -0400)]
NFS: Create a common fs_mount() function

The nfs4_remote_mount() function was only slightly different from the
nfs_fs_mount() function used by the generic client.  I created a new
nfs_mount_info structure to set different parameters to help combine
these functions.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Remove NFS4_MOUNT_UNSHARED
Bryan Schumaker [Thu, 10 May 2012 19:07:33 +0000 (15:07 -0400)]
NFS: Remove NFS4_MOUNT_UNSHARED

This flag is numerically equivalent to NFS_MOUNT_UNSHARED, so I can
remove it to make collapsing functions more straightforward.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Don't pass mount data to nfs_fscache_get_super_cookie()
Bryan Schumaker [Thu, 10 May 2012 19:07:32 +0000 (15:07 -0400)]
NFS: Don't pass mount data to nfs_fscache_get_super_cookie()

I intend on creating a single nfs_fs_mount() function used by all our
mount paths.  To avoid checking between new mounts and clone mounts, I
instead pass both structures to a new function in super.c that finds the
cache key and then looks up the super cookie.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a single nfs_get_root()
Bryan Schumaker [Thu, 10 May 2012 19:07:31 +0000 (15:07 -0400)]
NFS: Create a single nfs_get_root()

This patch splits out the NFS v4 specific functionality of
nfs4_get_root() into its own rpc_op called by the generic client, and
leaves nfs4_proc_get_rootfh() as its own stand alone function.  This
also allows me to change nfs4_remote_mount(), nfs4_xdev_mount() and
nfs4_remote_referral_mount() to use the generic client's nfs_get_root()
function.  Later patches in this series will collapse these functions
into one common function, so using the same get_root() function
everywhere simplifies future changes.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Rename nfs4_proc_get_root()
Bryan Schumaker [Thu, 10 May 2012 19:07:30 +0000 (15:07 -0400)]
NFS: Rename nfs4_proc_get_root()

This function is really getting the root filehandle and not the root
dentry of the filesystem.  I also removed the rpc_ops lookup from
nfs4_get_rootfh() under the assumption that if we reach this function
then we already know we are using NFS v4.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Clean up - Simplify reference counting in fs/nfs/direct.c
Trond Myklebust [Wed, 9 May 2012 17:54:53 +0000 (13:54 -0400)]
NFS: Clean up - Simplify reference counting in fs/nfs/direct.c

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Clean up - Rename nfs_unlock_request and nfs_unlock_request_dont_release
Trond Myklebust [Wed, 9 May 2012 18:04:55 +0000 (14:04 -0400)]
NFS: Clean up - Rename nfs_unlock_request and nfs_unlock_request_dont_release

Function rename to ensure that the functionality of nfs_unlock_request()
mirrors that of nfs_lock_request(). Then let nfs_unlock_and_release_request()
do the work of what used to be called nfs_unlock_request()...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Clean up - simplify nfs_lock_request()
Trond Myklebust [Wed, 9 May 2012 17:19:15 +0000 (13:19 -0400)]
NFS: Clean up - simplify nfs_lock_request()

We only have two places where we need to grab a reference when trying
to lock the nfs_page. We're better off making that explicit.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: nfs_set_page_writeback no longer needs to reference the page
Trond Myklebust [Wed, 9 May 2012 17:37:43 +0000 (13:37 -0400)]
NFS: nfs_set_page_writeback no longer needs to reference the page

We now hold a reference to the nfs_page across the calls to
nfs_set_page_writeback and nfs_end_page_writeback, and that
means we already have a reference to the struct page.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Prevent a deadlock in the new writeback code
Trond Myklebust [Wed, 9 May 2012 18:30:35 +0000 (14:30 -0400)]
NFS: Prevent a deadlock in the new writeback code

We have to unlock the nfs_page before we call nfs_end_page_writeback
to avoid races with functions that expect the page to be unlocked
when PG_locked and PG_writeback are not set.
The problem is that nfs_unlock_request also releases the nfs_page,
causing a deadlock if the release of the nfs_open_context
triggers an iput() while the PG_writeback flag is still set...

The solution is to separate the unlocking and release of the nfs_page,
so that we can do the former before nfs_end_page_writeback and the
latter after.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFSv4: nfs_client_return_marked_delegations can't flush data
Trond Myklebust [Sun, 6 May 2012 23:46:30 +0000 (19:46 -0400)]
NFSv4: nfs_client_return_marked_delegations can't flush data

Since even filemap_flush() needs to lock pages that are dirty, we
cannot risk calling it from the state manager context. Therefore,
we need to move the call to filemap_flush() to
nfs_async_inode_return_delegation().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: nfs_inode_return_delegation() should always flush dirty data
Trond Myklebust [Sun, 6 May 2012 23:34:17 +0000 (19:34 -0400)]
NFS: nfs_inode_return_delegation() should always flush dirty data

The assumption is that if you are in a situation where you need to
return the delegation, then you should probably stop caching the
data anyway.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Don't do a full flush to disk on close() if we hold a delegation
Trond Myklebust [Sun, 6 May 2012 23:10:59 +0000 (19:10 -0400)]
NFS: Don't do a full flush to disk on close() if we hold a delegation

If we hold a delegation then we know that it should be safe to continue
to cache the data beyond the close(). However since the process that wrote
the data may die after close(), we may still want to send the data to
server before those RPCSEC_GSS credentials expire. We therefore compromise
by starting writeback to the server, but don't wait for completion.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Fix sparse warnings
Trond Myklebust [Fri, 4 May 2012 17:54:24 +0000 (13:54 -0400)]
NFS: Fix sparse warnings

Fix the following sparse warnings:

fs/nfs/direct.c:221:6: warning: symbol 'nfs_direct_readpage_release' was
not declared. Should it be static?
fs/nfs/read.c:38:43: warning: non-ANSI function declaration of function
'nfs_readhdr_alloc'
fs/nfs/objlayout/objio_osd.c:214:5: warning: symbol '__alloc_objio_seg'
was not declared. Should it be static?

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>
12 years agoNFS: Fix O_DIRECT compile warnings
Trond Myklebust [Fri, 4 May 2012 17:47:16 +0000 (13:47 -0400)]
NFS: Fix O_DIRECT compile warnings

Fix the following compile warnings:
fs/nfs/direct.c: In function 'nfs_direct_read_schedule_segment':
fs/nfs/direct.c:325:11: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c:325:11: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c:325:11: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c:352:27: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c: In function 'nfs_direct_write_schedule_segment':
fs/nfs/direct.c:622:11: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c:622:11: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c:622:11: warning: comparison of distinct pointer types
lacks a cast [enabled by default]
fs/nfs/direct.c:650:27: warning: comparison of distinct pointer types
lacks a cast [enabled by default]

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
12 years agoNFS: Adapt readdirplus to application usage patterns
Trond Myklebust [Tue, 1 May 2012 21:37:59 +0000 (17:37 -0400)]
NFS: Adapt readdirplus to application usage patterns

While the use of READDIRPLUS is significantly more efficient than
READDIR followed by many LOOKUP calls, it is still less efficient
than just READDIR if the attributes are not required.

This patch tracks when lookups are attempted on the directory,
and uses that information to selectively disable READDIRPLUS
on that directory.
The first 'readdir' call is always served using READDIRPLUS.
Subsequent calls only use READDIRPLUS if there was a successful
lookup or revalidation on a child in the mean time.

Credit for the original idea should go to Neil Brown. See:
      http://www.spinics.net/lists/linux-nfs/msg19996.html
However, the implementation in this patch differs from Neil's
in that it focuses on tracking lookups rather than calls to
stat().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Neil Brown <neilb@suse.de>
12 years agoNFSv4: COMMIT does not need post-op attributes
Trond Myklebust [Sun, 29 Apr 2012 14:44:42 +0000 (10:44 -0400)]
NFSv4: COMMIT does not need post-op attributes

No attributes are supposed to change during a COMMIT call, so there
is no need to request post-op attributes.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Don't request cache consistency attributes on some writes
Trond Myklebust [Sat, 28 Apr 2012 18:55:16 +0000 (14:55 -0400)]
NFSv4: Don't request cache consistency attributes on some writes

We don't need cache consistency information when we're doing O_DIRECT
writes. Ditto for the case of delegated writes.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Simplify the NFSv4 REMOVE, LINK and RENAME compounds
Trond Myklebust [Fri, 27 Apr 2012 17:48:19 +0000 (13:48 -0400)]
NFSv4: Simplify the NFSv4 REMOVE, LINK and RENAME compounds

Get rid of the post-op GETATTR on the directory in order to reduce
the amount of processing done on the server.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Simplify the NFSv4 CREATE compound
Trond Myklebust [Fri, 27 Apr 2012 17:48:18 +0000 (13:48 -0400)]
NFSv4: Simplify the NFSv4 CREATE compound

Get rid of the post-op GETATTR on the directory in order to reduce
the amount of processing done on the server.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Simplify the NFSv4 OPEN compound
Trond Myklebust [Fri, 27 Apr 2012 17:48:18 +0000 (13:48 -0400)]
NFSv4: Simplify the NFSv4 OPEN compound

Get rid of the post-op GETATTR on the directory in order to reduce
the amount of processing done on the server.

The cost is that if we later need to stat() the directory, then we
know that the ctime and mtime are likely to be invalid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Simplify the cache invalidation code
Trond Myklebust [Fri, 27 Apr 2012 17:48:18 +0000 (13:48 -0400)]
NFS: Simplify the cache invalidation code

Now that NFSv2 and NFSv3 have simulated change attributes,
instead of using all three of mtime, ctime and change attribute to
manage data cache consistency, we can simplify the code to just use
the change attribute.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv2/v3: Simulate the change attribute
Trond Myklebust [Fri, 27 Apr 2012 17:48:18 +0000 (13:48 -0400)]
NFSv2/v3: Simulate the change attribute

Use the ctime to simulate a change attribute for NFSv2 and NFSv3.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Change attribute updates should set NFS_INO_REVAL_PAGECACHE
Trond Myklebust [Fri, 27 Apr 2012 17:48:17 +0000 (13:48 -0400)]
NFS: Change attribute updates should set NFS_INO_REVAL_PAGECACHE

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Simplify nfs_fhget()
Trond Myklebust [Fri, 27 Apr 2012 17:48:17 +0000 (13:48 -0400)]
NFS: Simplify nfs_fhget()

If the inode is being initialised, there is no point in
setting flags such as NFS_INO_INVALID_ACCESS,
NFS_INO_INVALID_ACL or NFS_INO_INVALID_DATA since there are
no cached access calls, acls or data caches to invalidate.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Always trust the PageUptodate flag when we have a delegation
Trond Myklebust [Sun, 29 Apr 2012 16:50:01 +0000 (12:50 -0400)]
NFS: Always trust the PageUptodate flag when we have a delegation

We can always use the optimal full page write if we know that we
hold a delegation.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Optimise away nfs_check_inode_attributes() when holding a delegation
Trond Myklebust [Sun, 29 Apr 2012 16:30:19 +0000 (12:30 -0400)]
NFS: Optimise away nfs_check_inode_attributes() when holding a delegation

We already know that the attribute cache is valid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Don't force page cache revalidations when holding a delegation
Trond Myklebust [Sun, 29 Apr 2012 15:23:50 +0000 (11:23 -0400)]
NFS: Don't force page cache revalidations when holding a delegation

If we're holding a delegation, then we already know that our
page cache is valid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Retrieve attributes _before_ calling delegreturn
Trond Myklebust [Sat, 28 Apr 2012 20:05:03 +0000 (16:05 -0400)]
NFSv4: Retrieve attributes _before_ calling delegreturn

In order to retrieve cache consistency attributes before
anyone else has a chance to change the inode, we need to
put the GETATTR op _before_ the DELEGRETURN op.

We can then use that as part of a 'nfs_post_op_update_inode_force_wcc()'
call, to ensure that we update the attributes without clearing our
cached data.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Delegreturn only needs the cache consistency bitmask
Trond Myklebust [Fri, 27 Apr 2012 17:48:17 +0000 (13:48 -0400)]
NFSv4: Delegreturn only needs the cache consistency bitmask

In order to do close-to-open cache consistency checking after
a delegreturn, we don't need to retrieve the full set of
attributes.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFSv4: Fix a typo in NFS4_enc_link_sz
Trond Myklebust [Fri, 27 Apr 2012 17:48:17 +0000 (13:48 -0400)]
NFSv4: Fix a typo in NFS4_enc_link_sz

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Simplify the nfs_read_completion functions
Trond Myklebust [Tue, 1 May 2012 16:49:58 +0000 (12:49 -0400)]
NFS: Simplify the nfs_read_completion functions

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Clean up nfs read and write error paths
Trond Myklebust [Tue, 1 May 2012 16:07:22 +0000 (12:07 -0400)]
NFS: Clean up nfs read and write error paths

Move the error handling for nfs_generic_pagein() into a single function.
Ditto for nfs_generic_flush().

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Read cleanups
Trond Myklebust [Tue, 1 May 2012 15:21:43 +0000 (11:21 -0400)]
NFS: Read cleanups

Remove unused variables, and reformat some code.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Fix a compile issue when CONFIG_NFS_V4_1 is undefined
Trond Myklebust [Mon, 30 Apr 2012 22:39:20 +0000 (18:39 -0400)]
NFS: Fix a compile issue when CONFIG_NFS_V4_1 is undefined

struct nfs_direct_req can't compile when struct pnfs_ds_commit_info
is undefined.

Reported-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Use kmem_cache_zalloc() in nfs_direct_req_alloc
Trond Myklebust [Mon, 30 Apr 2012 22:31:49 +0000 (18:31 -0400)]
NFS: Use kmem_cache_zalloc() in nfs_direct_req_alloc

Simplify the initialisation of O_DIRECT requests.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Simplify O_DIRECT page referencing
Trond Myklebust [Mon, 30 Apr 2012 17:27:31 +0000 (13:27 -0400)]
NFS: Simplify O_DIRECT page referencing

The O_DIRECT code shouldn't need to hold 2 references to each page. The
reference held by the struct nfs_page should suffice.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: O_DIRECT pgio_completion_ops error_cleanup must unlock the request
Trond Myklebust [Mon, 30 Apr 2012 17:40:06 +0000 (13:40 -0400)]
NFS: O_DIRECT pgio_completion_ops error_cleanup must unlock the request

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Ensure that we break out of read/write_schedule_segment on error
Trond Myklebust [Mon, 30 Apr 2012 17:22:54 +0000 (13:22 -0400)]
NFS: Ensure that we break out of read/write_schedule_segment on error

Currently we do break out of the for() loop, but we also need to
break out of the enclosing do {} while()...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Define dummy nfs_init_cinfo() and nfs_init_cinfo_from_inode()
Bryan Schumaker [Mon, 30 Apr 2012 18:30:22 +0000 (14:30 -0400)]
NFS: Define dummy nfs_init_cinfo() and nfs_init_cinfo_from_inode()

These are needed when v3 and v4 are not enabled.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Define nfs_direct_write_schedule_work() when v3 and v4 are disabled
Bryan Schumaker [Mon, 30 Apr 2012 17:27:11 +0000 (13:27 -0400)]
NFS: Define nfs_direct_write_schedule_work() when v3 and v4 are disabled

v2 doesn't have commits, so this function can be a no-op.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: pnfs_pageio_init_read() and init_write() need an extra argument
Bryan Schumaker [Mon, 30 Apr 2012 17:06:53 +0000 (13:06 -0400)]
NFS: pnfs_pageio_init_read() and init_write() need an extra argument

This is only when CONFIG_NFS_V4_1 isn't enabled.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Acked-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Fix a use-before-initialised warning in fs/nfs/write.c and fs/nfs/pnfs.c
Trond Myklebust [Fri, 27 Apr 2012 18:31:47 +0000 (14:31 -0400)]
NFS: Fix a use-before-initialised warning in fs/nfs/write.c and fs/nfs/pnfs.c

If the allocation of nfs_write_header fails, the list of nfs_pages that
needs to be cleaned up is still on desc->pg_list...

Reported-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Fred Isaman <iisaman@netapp.com>
12 years agoNFS: Remove extra rpc_clnt argument to proc_lookup
Bryan Schumaker [Fri, 27 Apr 2012 17:27:46 +0000 (13:27 -0400)]
NFS: Remove extra rpc_clnt argument to proc_lookup

Now that I'm doing secinfo automatically in the v4 code this extra
argument isn't needed.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Create a submount rpc_op
Bryan Schumaker [Fri, 27 Apr 2012 17:27:45 +0000 (13:27 -0400)]
NFS: Create a submount rpc_op

This simplifies the code for v2 and v3 and gives v4 a chance to decide
on referrals without needing to modify the generic client.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Remove secinfo knowledge out of the generic client
Bryan Schumaker [Fri, 27 Apr 2012 17:27:44 +0000 (13:27 -0400)]
NFS: Remove secinfo knowledge out of the generic client

And also remove the unneeded rpc_op.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Prevent garbage cinfo->ds from leaking out
Fred Isaman [Tue, 24 Apr 2012 18:50:34 +0000 (14:50 -0400)]
NFS: Prevent garbage cinfo->ds from leaking out

This is a bugfix that applies on top of the previous directio patches,
that fixes a bug introduced in "NFS: create struct nfs_commit_info".

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: rewrite directio write to use async coalesce code
Fred Isaman [Fri, 20 Apr 2012 18:47:57 +0000 (14:47 -0400)]
NFS: rewrite directio write to use async coalesce code

This also has the advantage that it allows directio to use pnfs.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: avoid some stat gathering for direct io
Fred Isaman [Fri, 20 Apr 2012 18:47:56 +0000 (14:47 -0400)]
NFS: avoid some stat gathering for direct io

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: add dreq to nfs_commit_info
Fred Isaman [Fri, 20 Apr 2012 18:47:55 +0000 (14:47 -0400)]
NFS: add dreq to nfs_commit_info

Need this to pass into nfs_commitdata_init, in order to keep data->dreq
accurate.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: create nfs_commit_completion_ops
Fred Isaman [Fri, 20 Apr 2012 18:47:54 +0000 (14:47 -0400)]
NFS: create nfs_commit_completion_ops

Factors out the code that needs to change when directio
starts using these code paths.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: create struct nfs_commit_info
Fred Isaman [Fri, 20 Apr 2012 18:47:53 +0000 (14:47 -0400)]
NFS: create struct nfs_commit_info

It is COMMIT that is handled the most differently between
the paged and direct paths.  Create a structure that encapsulates
everything either path needs to know about the commit state.

We could use void to hide some of the layout driver stuff, but
Trond suggests pulling it out to ensure type checking, given the
huge changes being made, and the fact that it doesn't interfere
with other drivers.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: create nfs_generic_commit_list
Fred Isaman [Fri, 20 Apr 2012 18:47:52 +0000 (14:47 -0400)]
NFS: create nfs_generic_commit_list

Simple refactoring.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: rewrite directio read to use async coalesce code
Fred Isaman [Fri, 20 Apr 2012 18:47:51 +0000 (14:47 -0400)]
NFS: rewrite directio read to use async coalesce code

This also has the advantage that it allows directio to use pnfs.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: prepare coalesce testing for directio
Fred Isaman [Fri, 20 Apr 2012 23:55:31 +0000 (19:55 -0400)]
NFS: prepare coalesce testing for directio

The coalesce code made assumptions that will no longer be true once
non-page aligned io occurs.  This introduces no change in
current behavior, but allows for more general situations to come.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: remove unused wb_complete field from struct nfs_page
Fred Isaman [Fri, 20 Apr 2012 18:47:49 +0000 (14:47 -0400)]
NFS: remove unused wb_complete field from struct nfs_page

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: create completion structure to pass into page_init functions
Fred Isaman [Fri, 20 Apr 2012 18:47:48 +0000 (14:47 -0400)]
NFS: create completion structure to pass into page_init functions

Factors out the code that will need to change when directio
starts using these code paths.  This will allow directio to use
the generic pagein and flush routines

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: merge _full and _partial write rpc_ops
Fred Isaman [Fri, 20 Apr 2012 18:47:47 +0000 (14:47 -0400)]
NFS: merge _full and _partial write rpc_ops

Decouple nfs_pgio_header and nfs_write_data, and have (possibly
multiple) nfs_write_datas each take a refcount on nfs_pgio_header.

For the moment keeps nfs_write_header as a way to preallocate a single
nfs_write_data with the nfs_pgio_header.  The code doesn't need this,
and would be prettier without, but given the amount of churn I am
already introducing I didn't want to play with tuning new mempools.

This also fixes bug in pnfs_ld_handle_write_error.  In the case of
desc->pg_bsize < PAGE_CACHE_SIZE, the pages list was empty, causing
replay attempt to do nothing.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: merge _full and _partial read rpc_ops
Fred Isaman [Fri, 20 Apr 2012 18:47:46 +0000 (14:47 -0400)]
NFS: merge _full and _partial read rpc_ops

Decouple nfs_pgio_header and nfs_read_data, and have (possibly
multiple) nfs_read_datas each take a refcount on nfs_pgio_header.

For the moment keeps nfs_read_header as a way to preallocate a single
nfs_read_data with the nfs_pgio_header.  The code doesn't need this,
and would be prettier without, but given the amount of churn I am
already introducing I didn't want to play with tuning new mempools.

This also fixes bug in pnfs_ld_handle_read_error.  In the case of
desc->pg_bsize < PAGE_CACHE_SIZE, the pages list was empty, causing
replay attempt to do nothing.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: create struct nfs_page_array
Fred Isaman [Fri, 20 Apr 2012 18:47:45 +0000 (14:47 -0400)]
NFS: create struct nfs_page_array

Both nfs_read_data and nfs_write_data devote several fields which
can be combined into a single shared struct.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: create common nfs_pgio_header for both read and write
Fred Isaman [Fri, 20 Apr 2012 18:47:44 +0000 (14:47 -0400)]
NFS: create common nfs_pgio_header for both read and write

In order to avoid duplicating all the data in nfs_read_data whenever we
split it up into multiple RPC calls (either due to a short read result
or due to rsize < PAGE_SIZE), we split out the bits that are the same
per RPC call into a separate "header" structure.

The goal this patch moves towards is to have a single header
refcounted by several rpc_data structures.  Thus, want to always refer
from rpc_data to the header, and not the other way.  This patch comes
close to that ideal, but the directio code currently needs some
special casing, isolated in the nfs_direct_[read_write]hdr_release()
functions.  This will be dealt with in a future patch.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: use req_offset where appropriate
Fred Isaman [Fri, 20 Apr 2012 18:47:43 +0000 (14:47 -0400)]
NFS: use req_offset where appropriate

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: remove unnecessary casts of void pointers in nfs4filelayout.c
Fred Isaman [Fri, 20 Apr 2012 18:47:42 +0000 (14:47 -0400)]
NFS: remove unnecessary casts of void pointers in nfs4filelayout.c

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: reverse arg order in nfs_initiate_[read|write]
Fred Isaman [Fri, 20 Apr 2012 18:47:41 +0000 (14:47 -0400)]
NFS: reverse arg order in nfs_initiate_[read|write]

Make it consistent with nfs_initiate_commit.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: dprintks in directio code were referencing task after put
Fred Isaman [Fri, 20 Apr 2012 18:47:40 +0000 (14:47 -0400)]
NFS: dprintks in directio code were referencing task after put

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: add a struct nfs_commit_data to replace nfs_write_data in commits
Fred Isaman [Fri, 20 Apr 2012 18:47:39 +0000 (14:47 -0400)]
NFS: add a struct nfs_commit_data to replace nfs_write_data in commits

Commits don't need the vectors of pages, etc. that writes do. Split out
a separate structure for the commit operation.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS4.1: Add lseg to struct nfs4_fl_commit_bucket
Fred Isaman [Fri, 20 Apr 2012 18:47:38 +0000 (14:47 -0400)]
NFS4.1: Add lseg to struct nfs4_fl_commit_bucket

Also create a commit_info structure to hold the bucket array and push
it up from the lseg to the layout where it really belongs.

While we are at it, fix a refcounting bug due to an (incorrect)
implicit assumption that filelayout_scan_ds_commit_list always
completely emptied the src list.

This clarifies refcounting, removes the ugly find_only_write_lseg
functions, and pushes the file layout commit code along on the path to
supporting multiple lsegs.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS4.1: make pnfs_ld_[read|write]_done consistent
Fred Isaman [Fri, 20 Apr 2012 18:47:37 +0000 (14:47 -0400)]
NFS4.1: make pnfs_ld_[read|write]_done consistent

The two functions had diverged quite a bit, with the write function
being a bit more robust than the read.

However, these still break badly in the desc->pg_bsize < PAGE_CACHE_SIZE case,
as then there is nothing hanging on the data->pages list, and the resend
ends up doing nothing.  This will be fixed in a patch later in the series.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: grab open context in direct read
Fred Isaman [Fri, 20 Apr 2012 18:47:36 +0000 (14:47 -0400)]
NFS: grab open context in direct read

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Remove unused function nfs_lookup_with_sec()
Bryan Schumaker [Fri, 27 Apr 2012 17:27:43 +0000 (13:27 -0400)]
NFS: Remove unused function nfs_lookup_with_sec()

This fixes a compiler warning.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Honor the authflavor set in the clone mount data
Bryan Schumaker [Fri, 27 Apr 2012 17:27:42 +0000 (13:27 -0400)]
NFS: Honor the authflavor set in the clone mount data

The authflavor is set in an nfs_clone_mount structure and passed to the
xdev_mount() functions where it was promptly ignored.  Instead, use it
to initialize an rpc_clnt for the cloned server.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Fix following referral mount points with different security
Bryan Schumaker [Fri, 27 Apr 2012 17:27:41 +0000 (13:27 -0400)]
NFS: Fix following referral mount points with different security

I create a new proc_lookup_mountpoint() to use when submounting an NFS
v4 share.  This function returns an rpc_clnt to use for performing an
fs_locations() call on a referral's mountpoint.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Do secinfo as part of lookup
Bryan Schumaker [Fri, 27 Apr 2012 17:27:40 +0000 (13:27 -0400)]
NFS: Do secinfo as part of lookup

Whenever lookup sees wrongsec do a secinfo and retry the lookup to find
attributes of the file or directory, such as "is this a referral
mountpoint?".  This also allows me to remove handling -NFS4ERR_WRONSEC
as part of getattr xdr decoding.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Handle exceptions coming out of nfs4_proc_fs_locations()
Bryan Schumaker [Fri, 27 Apr 2012 17:27:39 +0000 (13:27 -0400)]
NFS: Handle exceptions coming out of nfs4_proc_fs_locations()

We don't want to return -NFS4ERR_WRONGSEC to the VFS because it could
cause the kernel to oops.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoNFS: Fix SECINFO_NO_NAME
Bryan Schumaker [Fri, 27 Apr 2012 17:27:38 +0000 (13:27 -0400)]
NFS: Fix SECINFO_NO_NAME

I was using the same decoder function for SECINFO and SECINFO_NO_NAME,
so it was returning an error when it tried to decode an OP_SECINFO_NO_NAME
header as OP_SECINFO.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
12 years agoSUNRPC: traverse clients tree on PipeFS event
Stanislav Kinsbursky [Fri, 27 Apr 2012 09:00:17 +0000 (13:00 +0400)]
SUNRPC: traverse clients tree on PipeFS event

v2: recursion was replaced by loop

If client is a clone, then it's parent can not be in the list.
But parent's Pipefs dentries have to be created and destroyed.

Note: event skip helper for clients introduced

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>