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Commit Graph

1272 Commits

Author SHA1 Message Date
Benny Halevy
e78291e4e0 nfs: nfs4xdr: introduce decode_sessionid helper
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 14:02:14 -04:00
Benny Halevy
db942bbd09 nfs: nfs4xdr: introduce decode_verifier helper
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[Trond: Fixed up an 'uninitialised variable' issue in decode_readdir]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:57:58 -04:00
Benny Halevy
07d30434cf nfs: nfs4xdr: introduce decode_opaque_fixed and decode_stateid helpers
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:26:27 -04:00
Benny Halevy
686841b3cc nfs: nfs4xdr: introduce print_overflow_msg
Part fo the nfs4xdr cleanup.  READ_BUF will go away.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:24:38 -04:00
Benny Halevy
c816fd3406 nfs: nfs4xdr: get rid of READTIME
It has no users.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:24:32 -04:00
Benny Halevy
3ceb4dbb99 nfs: nfs4xdr: get rid of READ64
s/READ64\(\*(.*)\)/p = xdr_decode_hyper(p, \1)/
s/READ64\((.*)\)/p = xdr_decode_hyper(p, &\1)/

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:24:13 -04:00
Benny Halevy
6f723f7710 nfs: nfs4xdr: get rid of READ32
s/READ32\((.*)\)/\1 = be32_to_cpup(p++)/

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:23:58 -04:00
Benny Halevy
811652bd6e nfs: nfs4xdr: merge xdr_encode_int+xdr_encode_opaque_fixed into xdr_encode_opaque
use encode_string where appropriate.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:19:24 -04:00
Benny Halevy
345585132a nfs: nfs4xdr: optimize low level encoding
do not increment encoding ptr if not needed.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:18:03 -04:00
Benny Halevy
13c65ce900 nfs: nfs4xdr: change RESERVE_SPACE macro into a static helper
In order to open code and expose the result pointer assignment.

Alternatively, we can open code the call to xdr_reserve_space
and do the BUG_ON an the error case at the call site.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:17:17 -04:00
Benny Halevy
2220f13a8b nfs: nfs4xdr: encode_compound_hdr does not have to round up reserved bytes
This is already done by xdr_reserve_space and since encode_compound_hdr
is adding a byte count to "12" which is already word aligned, the xdr
level rounding will work just as well.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:16:00 -04:00
Benny Halevy
42edd69812 nfs: nfs4xdr: optimize RESERVE_SPACE in encode_create_session and encode_sequence
Coalesce multilpe constant RESERVE_SPACEs into one

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:15:20 -04:00
Benny Halevy
93f0cf2594 nfs: nfs4xdr: get rid of WRITEMEM
s/WRITEMEM(/p = xdr_encode_opaque_fixed(p, /

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:13:58 -04:00
Benny Halevy
b95be5a976 nfs: nfs4xdr: get rid of WRITE64
s/WRITE64/p = xdr_encode_hyper(p, /

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:13:15 -04:00
Benny Halevy
e75bc1c89e nfs: nfs4xdr: get rid of WRITE32
s/WRITE32/*p++ = cpu_to_be32/

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 13:12:55 -04:00
Trond Myklebust
1ae88b2e44 NFS: Fix an O_DIRECT Oops...
We can't call nfs_readdata_release()/nfs_writedata_release() without
first initialising and referencing args.context. Doing so inside
nfs_direct_read_schedule_segment()/nfs_direct_write_schedule_segment()
causes an Oops.

We should rather be calling nfs_readdata_free()/nfs_writedata_free() in
those cases.

Looking at the O_DIRECT code, the "struct nfs_direct_req" is already
referencing the nfs_open_context for us. Since the readdata and writedata
structures carry a reference to that, we can simplify things by getting rid
of the extra nfs_open_context references, so that we can replace all
instances of nfs_readdata_release()/nfs_writedata_release().

Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-12 08:21:39 -07:00
Trond Myklebust
d953126a28 NFSv4: Fix a problem whereby a buggy server can oops the kernel
We just had a case in which a buggy server occasionally returns the wrong
attributes during an OPEN call. While the client does catch this sort of
condition in nfs4_open_done(), and causes the nfs4_atomic_open() to return
-EISDIR, the logic in nfs_atomic_lookup() is broken, since it causes a
fallback to an ordinary lookup instead of just returning the error.

When the buggy server then returns a regular file for the fallback lookup,
the VFS allows the open, and bad things start to happen, since the open
file doesn't have any associated NFSv4 state.

The fix is firstly to return the EISDIR/ENOTDIR errors immediately, and
secondly to ensure that we are always careful when dereferencing the
nfs_open_context state pointer.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-07-21 19:22:38 -04:00
Trond Myklebust
fccba80455 NFSv4: Fix an NFSv4 mount regression
Commit 008f55d0e0 (nfs41: recover lease in
_nfs4_lookup_root) forces the state manager to always run on mount. This is
a bug in the case of NFSv4.0, which doesn't require us to send a
setclientid until we want to grab file state.

In any case, this is completely the wrong place to be doing state
management. Moving that code into nfs4_init_session...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-07-21 16:48:07 -04:00
Trond Myklebust
b64aec8d1e NFSv4: Fix an Oops in nfs4_free_lock_state
The oops http://www.kerneloops.org/raw.php?rawid=537858&msgid= appears to
be due to the nfs4_lock_state->ls_state field being uninitialised. This
happens if the call to nfs4_free_lock_state() is triggered at the end of
nfs4_get_lock_state().

The fix is to move the initialisation of ls_state into the allocator.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-07-21 16:47:46 -04:00
Alexey Dobriyan
405f55712d headers: smp_lock.h redux
* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
  It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT

  This will make hardirq.h inclusion cheaper for every PREEMPT=n config
  (which includes allmodconfig/allyesconfig, BTW)

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-12 12:22:34 -07:00
Linus Torvalds
81e4e1ba7e Revert "fuse: Fix build error" as unnecessary
This reverts commit 097041e576.

Trond had a better fix, which is the parent of this one ("Fix compile
error due to congestion_wait() changes")

Requested-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-11 11:22:34 -07:00
Larry Finger
097041e576 fuse: Fix build error
When building v2.6.31-rc2-344-g69ca06c, the following build errors are
found due to missing includes:

 CC [M]  fs/fuse/dev.o
fs/fuse/dev.c: In function ‘request_end’:
fs/fuse/dev.c:289: error: ‘BLK_RW_SYNC’ undeclared (first use in this function)
...
fs/nfs/write.c: In function ‘nfs_set_page_writeback’:
fs/nfs/write.c:207: error: ‘BLK_RW_ASYNC’ undeclared (first use in this function)

Signed-off-by: Larry Finger@lwfinger.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-10 19:09:46 -07:00
Jens Axboe
8aa7e847d8 Fix congestion_wait() sync/async vs read/write confusion
Commit 1faa16d228 accidentally broke
the bdi congestion wait queue logic, causing us to wait on congestion
for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-07-10 20:31:53 +02:00
Alexey Dobriyan
b43f3cbd21 headers: mnt_namespace.h redux
Fix various silly problems wrt mnt_namespace.h:

 - exit_mnt_ns() isn't used, remove it
 - done that, sched.h and nsproxy.h inclusions aren't needed
 - mount.h inclusion was need for vfsmount_lock, but no longer
 - remove mnt_namespace.h inclusion from files which don't use anything
   from mnt_namespace.h

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-08 09:31:56 -07:00
Trond Myklebust
b88f8a546f NFS: Correct the NFS mount path when following a referral
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-22 21:28:25 -07:00
Trond Myklebust
0b75b35c7c NFS: Fix nfs_path() to always return a '/' at the beginning of the path
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-22 21:28:25 -07:00
Trond Myklebust
c02d7adf8c NFSv4: Replace nfs4_path_walk() with VFS path lookup in a private namespace
As noted in the previous patch, the NFSv4 client mount code currently
has several limitations. If the mount path contains symlinks, or
referrals, or even if it just contains a '..', then the client code in
nfs4_path_walk() will fail with an error.

This patch replaces the nfs4_path_walk()-based lookup with a helper
function that sets up a private namespace to represent the namespace on the
server, then uses the ordinary VFS and NFS path lookup code to walk down the
mount path in that namespace.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-22 21:28:25 -07:00
Linus Torvalds
7e0338c0de Merge branch 'for-2.6.31' of git://fieldses.org/git/linux-nfsd
* 'for-2.6.31' of git://fieldses.org/git/linux-nfsd: (60 commits)
  SUNRPC: Fix the TCP server's send buffer accounting
  nfsd41: Backchannel: minorversion support for the back channel
  nfsd41: Backchannel: cleanup nfs4.0 callback encode routines
  nfsd41: Remove ip address collision detection case
  nfsd: optimise the starting of zero threads when none are running.
  nfsd: don't take nfsd_mutex twice when setting number of threads.
  nfsd41: sanity check client drc maxreqs
  nfsd41: move channel attributes from nfsd4_session to a nfsd4_channel_attr struct
  NFS: kill off complicated macro 'PROC'
  sunrpc: potential memory leak in function rdma_read_xdr
  nfsd: minor nfsd_vfs_write cleanup
  nfsd: Pull write-gathering code out of nfsd_vfs_write
  nfsd: track last inode only in use_wgather case
  sunrpc: align cache_clean work's timer
  nfsd: Use write gathering only with NFSv2
  NFSv4: kill off complicated macro 'PROC'
  NFSv4: do exact check about attribute specified
  knfsd: remove unreported filehandle stats counters
  knfsd: fix reply cache memory corruption
  knfsd: reply cache cleanups
  ...
2009-06-22 12:55:50 -07:00
Benny Halevy
578e458568 nfs41: Move initialization of nfs4_opendata seq_res to nfs4_init_opendata_res
nfs4_open_recover_helper clears opendata->o_res
before calling nfs4_init_opendata_res, thus causing
NFSv4.0 OPEN operations to be sent rather than nfsv4.1.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-20 14:55:12 -04:00
Trond Myklebust
1f84603c09 Merge branch 'devel-for-2.6.31' into for-2.6.31
Conflicts:
	fs/nfs/client.c
	fs/nfs/super.c
2009-06-18 18:13:44 -07:00
James Morris
4bf259e3ae nfs: remove unnecessary NFS_INO_INVALID_ACL checks
Unless I'm mistaken, NFS_INO_INVALID_ACL is being checked twice during
getacl calls (i.e. first via nfs_revalidate_inode() and then by each all
site).

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:14 -07:00
Chuck Lever
a5a16bae70 NFS: More "sloppy" parsing problems
Specifying "port=-5" with the kernel's current mount option parser
generates "unrecognized mount option".  If "sloppy" is set, this
causes the mount to succeed and use the default values; the desired
behavior is that, since this is a valid option with an invalid value,
the mount should fail, even with "sloppy."

To properly handle "sloppy" parsing, we need to distinguish between
correct options with invalid values, and incorrect options.  We will
need to parse integer values by hand, therefore, and not rely on
match_token().

For instance, these must all fail with "invalid value":

	port=12345678
	port=-5
	port=samuel

and not with "unrecognized option," as they do currently.

Thus, for the sake of match_token() we need to treat the values for
these options as strings, and do the conversion to integers using
strict_strtol().

This is basically the same solution we used for the earlier "retry="
fix (commit ecbb3845), except in this case the kernel actually has to
parse the value, rather than ignore it.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:14 -07:00
Chuck Lever
d23c45fd84 NFS: Invalid mount option values should always fail, even with "sloppy"
Ian Kent reports:

"I've noticed a couple of other regressions with the options vers
and proto option of mount.nfs(8).

The commands:

mount -t nfs -o vers=<invalid version> <server>:/<path> /<mountpoint>
mount -t nfs -o proto=<invalid proto> <server>:/<path> /<mountpoint>

both immediately fail.

But if the "-s" option is also used they both succeed with the
mount falling back to defaults (by the look of it).

In the past these failed even when the sloppy option was given, as
I think they should. I believe the sloppy option is meant to allow
the mount command to still function for mount options (for example
in shared autofs maps) that exist on other Unix implementations but
aren't present in the Linux mount.nfs(8). So, an invalid value
specified for a known mount option is different to an unknown mount
option and should fail appropriately."

See RH bugzilla 486266.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:13 -07:00
Chuck Lever
065015e5ef NFS: Remove unused XDR decoder functions
Clean up: Remove xdr_decode_fhstatus() and xdr_decode_fhstatus3(), now
that they are unused.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:13 -07:00
Chuck Lever
8e02f6b9aa NFS: Update MNT and MNT3 reply decoding functions
Solder xdr_stream-based XDR decoding functions into the in-kernel mountd
client that are more careful about checking data types and watching for
buffer overflows.  The new MNT3 decoder includes support for auth-flavor
list decoding.

The "_sz" macro for MNT3 replies was missing the size of the file handle.
I've added this back, and included the size of the auth flavor array.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:13 -07:00
Chuck Lever
a14017db28 NFS: add XDR decoder for mountd version 3 auth-flavor lists
Introduce an xdr_stream-based XDR decoder that can unpack the auth-
flavor list returned in a MNT3 reply.

The nfs_mount() function's caller allocates an array, and passes the
size and a pointer to it.  The decoder decodes all the flavors it can
into the array, and returns the number of decoded flavors.

If the caller is not interested in the auth flavors, it can pass a
value of zero as the size of the pre-allocated array.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:12 -07:00
Chuck Lever
4fdcd9966d NFS: add new file handle decoders to in-kernel mountd client
Introduce xdr_stream-based XDR file handle decoders to the in-kernel
mountd client.  These are more careful than the existing decoder
functions about buffer overflows and data type and range checking.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:12 -07:00
Chuck Lever
fb12529577 NFS: Add separate mountd status code decoders for each mountd version
Introduce data structures and xdr_stream-based decoding functions for
unmarshalling mountd status codes properly.

Mountd version 3 uses specific standard error return codes that are
not errno values and not NFS3ERR_ values.  These have a well-defined
standard mapping to local errno values.  Introduce data structures
and a decoder function that map these status codes to local errno
values properly.  This is new functionality (but not used yet).

Version 1 mountd status values are defined by RFC 1094 as UNIX error
values (errno values).  Errno values on heterogeneous systems do not
necessarily match each other.  To avoid exposing possibly incorrect
errno values to upper layers, the current XDR decoder converts all
non-zero MNT version 1 status codes to -EACCES.

The OpenGroup XNFS standard provides a mapping similar to but smaller
than the version 3 error codes.  Implement a decoder that uses the XNFS
error codes, replacing the current decoder.

For both mountd protocol versions, map unrecognized errors to -EACCES.

Finally we introduce a replacement data structure for mnt_fhstatus
at this time, which is used by the new XDR decoders.  In addition to
documenting that the status value returned by the XDR decoders is
always an errno, this new structure will be expanded in subsequent
patches.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:12 -07:00
Chuck Lever
99835db430 NFS: remove unused function in fs/nfs/mount_clnt.c
Clean up: remove xdr_encode_dirpath() now that it has been replaced.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:11 -07:00
Chuck Lever
29a1bd6bf8 NFS: Use xdr_stream-based XDR encoder for MNT's dirpath argument
Check the length of the supplied dirpath, and see that it fits
properly in the RPC buffer.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:11 -07:00
Chuck Lever
2ad780978b NFS: Clean up MNT program definitions
Clean up:  Relocate MNT program procedure number definitions to the
only file that uses them.  Relocate the version number definitions,
which are shared, to nfs.h.  Remove duplicate program number
definitions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:11 -07:00
Chuck Lever
18fc316419 NFS: Fix false error return from nfs_callback_up() if ipv6.ko is not available
Clear "ret" if the error return from svc_create_xprt(AF_INET6) was
-EAFNOSUPORT.  Otherwise, callback start-up will succeed, but
nfs_callback_up() will return -EAFNOSUPPORT anyway, and the first
NFSv4 mount attempt after a reboot will fail.

Bug introduced by commit f738f517 in 2.6.30-rc1.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:10 -07:00
Chuck Lever
a21bdd9b96 NFS: Return error code from nfs_callback_up() to user space
If the kernel cannot start the NFSv4 callback service during a mount
request, it returns -ENOMEM to user space, resulting in this message:

   mount.nfs4: Cannot allocate memory

Adjust nfs_alloc_client() and nfs_get_client() to pass NFSv4 callback
start-up errors back to user space so a less mysterious error message
can be displayed by the mount command.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:10 -07:00
Chuck Lever
c381ad2cf2 NFS: Do not display the setting of the "intr" mount option
The "intr" mount option has been deprecated for a while, but
/proc/mounts continues to display "nointr" whether "intr" or "nointr"
has been specified for a mount point.

Since these options do not have any effect, simply do not display
them.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:09 -07:00
Suresh Jayaraman
bf40d3435c NFS: add support for splice writes
Adds support for splice writes. It effectively calls
generic_file_splice_write() to do the writes.

We need not worry about O_APPEND case as the combination of splice()
writes and O_APPEND is disallowed. This patch propagates NFS write
errors back to the caller. The number of bytes written via splice are
being added to NFSIO_NORMALWRITTENBYTES as these are effectively
cached writes.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-06-17 18:02:09 -07:00
Trond Myklebust
301933a0ac Merge commit 'linux-pnfs/nfs41-for-2.6.31' into nfsv41-for-2.6.31 2009-06-17 17:59:58 -07:00
Ricardo Labiaga
68f3f90133 nfs41: Backchannel: CB_SEQUENCE validation
Validates the callback's sessionID, the slot number, and the sequence ID.
Increments the slot's sequence.

Detects replays, but simply prints a debug message (if debugging is enabled
since we don't yet implement a duplicate request cache for the backchannel.
This should not present a problem, since only idempotent callbacks are
currently implemented.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: Backchannel: Be more obvious about the return value]
[nfs41: Backchannel: dprink in host order]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17 14:11:43 -07:00
Ricardo Labiaga
963891ac43 nfs41: Backchannel: New find_client_with_session()
Finds the 'struct nfs_client' that matches the server's address, major
version number, and session ID.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17 14:11:43 -07:00
Ricardo Labiaga
f8625a6a4b nfs41: Backchannel: Add a backchannel slot table to the session
Defines a new 'struct nfs4_slot_table' in the 'struct nfs4_session'
for use by the backchannel.  Initializes, resets, and destroys the backchannel
slot table in the same manner the forechannel slot table is initialized,
reset, and destroyed.

The sequenceid for each slot in the backchannel slot table is initialized
to 0, whereas the forechannel slotid's sequenceid is set to 1.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17 14:11:42 -07:00
Ricardo Labiaga
050047ce71 nfs41: Backchannel: Refactor nfs4_init_slot_table()
Generalize nfs4_init_slot_table() so it can be used to initialize the
backchannel slot table in addition to the forechannel slot table.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
2009-06-17 14:11:42 -07:00