Commit Graph

156891 Commits

Author SHA1 Message Date
Ricardo Labiaga
132f97715c nfsd41: Backchannel: Add sequence arguments to callback RPC arguments
Follow the model we use in the client. Make the sequence arguments
part of the regular RPC arguments.  None of the callbacks that are
soon to be implemented expect results that need to be passed back
to the caller, so we don't define a separate RPC results structure.
For session validation, the cb_sequence decoding will use a pointer
to the sequence arguments that are part of the RPC argument.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
[define struct nfsd4_cb_sequence here]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15 20:49:55 -04:00
Andy Adamson
38524ab38f nfsd41: Backchannel: callback infrastructure
Keep the xprt used for create_session in cl_cb_xprt.
Mark cl_callback.cb_minorversion = 1 and remember
the client provided cl_callback.cb_prog rpc program number.
Use it to probe the callback path.

Use the client's network address to initialize as the
callback's address as expected by the xprt creation
routines.

Define xdr sizes and code nfs4_cb_compound header to be able
to send a null callback rpc.

Signed-off-by: Andy Adamson<andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
[get callback minorversion from fore channel's]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: change bc_sock to bc_xprt]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[pulled definition for cl_cb_xprt]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: set up backchannel's cb_addr]
[moved rpc_create_args init to "nfsd: modify nfsd4.1 backchannel to use new xprt class"]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15 20:49:55 -04:00
J. Bruce Fields
80fc015bdf nfsd4: use common rpc_cred for all callbacks
Callbacks are always made using the machine's identity, so we can use a
single auth_generic credential shared among callbacks to all clients and
let the rpc code take care of the rest.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15 20:49:34 -04:00
J. Bruce Fields
29ab23cc5d nfsd4: allow nfs4 state startup to fail
The failure here is pretty unlikely, but we should handle it anyway.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15 20:49:33 -04:00
Trond Myklebust
5d351754fc SUNRPC: Defer the auth_gss upcall when the RPC call is asynchronous
Otherwise, the upcall is going to be synchronous, which may not be what the
caller wants...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15 20:49:33 -04:00
J. Bruce Fields
886e3b7fe6 nfsd4: fix null dereference creating nfsv4 callback client
On setting up the callback to the client, we attempt to use the same
authentication flavor the client did.  We find an rpc cred to use by
calling rpcauth_lookup_credcache(), which assumes that the given
authentication flavor has a credentials cache.  However, this is not
required to be true--in particular, auth_null does not use one.
Instead, we should call the auth's lookup_cred() method.

Without this, a client attempting to mount using nfsv4 and auth_null
triggers a null dereference.

Cc: stable@kernel.org
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-15 20:49:33 -04:00
Benny Halevy
4be36ca0ce nfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definition
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-13 15:57:39 -04:00
Alexandros Batsakis
f300baba5a nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel
[sunrpc: change idle timeout value for the backchannel]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-13 15:46:15 -04:00
NeilBrown
908329f2c0 sunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.
The extra call to cache_revisit_request in cache_fresh_unlocked is not
needed, as should have been fairly clear at the time of
   commit 4013edea9a

If there are requests to be revisited, then we can be sure that
CACHE_PENDING is set, so the second call is sufficient.

So remove the first call.
Then remove the 'new' parameter,
then remove the return value for cache_fresh_locked which is only used
to provide the value for 'new'.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11 17:08:54 -04:00
NeilBrown
9e4c6379a6 sunrpc/cache: change cache_defer_req to return -ve error, not boolean.
As "cache_defer_req" does not sound like a predicate, having it return
a boolean value can be confusing.  It is more consistent to return
0 for success and negative for error.

Exactly what error code to return is not important as we don't
differentiate between reasons why the request wasn't deferred,
we only care about whether it was deferred or not.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11 17:03:27 -04:00
Rahul Iyer
4cfc7e6019 nfsd41: sunrpc: Added rpc server-side backchannel handling
When the call direction is a reply, copy the xid and call direction into the
req->rq_private_buf.head[0].iov_base otherwise rpc_verify_header returns
rpc_garbage.

Signed-off-by: Rahul Iyer <iyer@netapp.com>
Signed-off-by: Mike Sager <sager@netapp.com>
Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[get rid of CONFIG_NFSD_V4_1]
[sunrpc: refactoring of svc_tcp_recvfrom]
[nfsd41: sunrpc: create common send routine for the fore and the back channels]
[nfsd41: sunrpc: Use free_page() to free server backchannel pages]
[nfsd41: sunrpc: Document server backchannel locking]
[nfsd41: sunrpc: remove bc_connect_worker()]
[nfsd41: sunrpc: Define xprt_server_backchannel()[
[nfsd41: sunrpc: remove bc_close and bc_init_auto_disconnect dummy functions]
[nfsd41: sunrpc: eliminate unneeded switch statement in xs_setup_tcp()]
[nfsd41: sunrpc: Don't auto close the server backchannel connection]
[nfsd41: sunrpc: Remove unused functions]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: change bc_sock to bc_xprt]
[nfsd41: sunrpc: move struct rpc_buffer def into a common header file]
[nfsd41: sunrpc: use rpc_sleep in bc_send_request so not to block on mutex]
[removed cosmetic changes]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[sunrpc: add new xprt class for nfsv4.1 backchannel]
[sunrpc: v2.1 change handling of auto_close and init_auto_disconnect operations for the nfsv4.1 backchannel]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
[reverted more cosmetic leftovers]
[got rid of xprt_server_backchannel]
[separated "nfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel"]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Cc: Trond Myklebust <trond.myklebust@netapp.com>
[sunrpc: change idle timeout value for the backchannel]
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Acked-by: Trond Myklebust <trond.myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-11 15:04:16 -04:00
Benny Halevy
6951867b99 nfsd41: sunrpc: move struct rpc_buffer def into sunrpc.h
Move struct rpc_buffer's definition into a sunrpc.h, a common, internal
header file, in preparation for supporting the nfsv4.1 backchannel.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: sunrpc: #include <linux/net.h> from sunrpc.h]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-10 12:09:06 -04:00
J. Bruce Fields
aed100fafb nfsd: fix leak on error in nfsv3 readdir
Note the !dchild->d_inode case can leak the filehandle.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-04 15:48:00 -04:00
J. Bruce Fields
8177e6d6df nfsd: clean up readdirplus encoding
Make the return from compose_entry_fh() zero or an error, even though
the returned error isn't used, just to make the meaning of the return
immediately obvious.

Move some repeated code out of main function into helper.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-04 15:47:40 -04:00
J. Bruce Fields
1be10a88ca nfsd4: filehandle leak or error exit from fh_compose()
A number of callers (nfsd4_encode_fattr(), at least) don't bother to
release the filehandle returned to fh_compose() if fh_compose() returns
an error.  So, modify fh_compose() to release the filehandle before
returning an error.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-04 11:59:32 -04:00
Trond Myklebust
2671a4bf35 NFSd: Fix filehandle leak in exp_pseudoroot() and nfsd4_path()
nfsd4_path() allocates a temporary filehandle and then fails to free it
before the function exits, leaking reference counts to the dentry and
export that it refers to.

Also, nfsd4_lookupp() puts the result of exp_pseudoroot() in a temporary
filehandle which it releases on success of exp_pseudoroot() but not on
failure; fix exp_pseudoroot to ensure that on failure it releases the
filehandle before returning.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-03 16:57:57 -04:00
J. Bruce Fields
bc6c53d5a1 nfsd: move fsid_type choice out of fh_compose
More trivial cleanup.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-02 23:54:48 -04:00
J. Bruce Fields
8e498751f2 nfsd: move some of fh_compose into helper functions
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-02 23:53:51 -04:00
Andy Adamson
557ce2646e nfsd41: replace page based DRC with buffer based DRC
Use NFSD_SLOT_CACHE_SIZE size buffers for sessions DRC instead of holding nfsd
pages in cache.

Connectathon testing has shown that 1024 bytes for encoded compound operation
responses past the sequence operation is sufficient, 512 bytes is a little too
small. Set NFSD_SLOT_CACHE_SIZE to 1024.

Allocate memory for the session DRC in the CREATE_SESSION operation
to guarantee that the memory resource is available for caching responses.
Allocate each slot individually in preparation for slot table size negotiation.

Remove struct nfsd4_cache_entry and helper functions for the old page-based
DRC.

The iov_len calculation in nfs4svc_encode_compoundres is now always
correct.  Replay is now done in nfsd4_sequence under the state lock, so
the session ref count is only bumped on non-replay. Clean up the
nfs4svc_encode_compoundres session logic.

The nfsd4_compound_state statp pointer is also not used.
Remove nfsd4_set_statp().

Move useful nfsd4_cache_entry fields into nfsd4_slot.

Signed-off-by: Andy Adamson <andros@netapp.com
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01 22:24:06 -04:00
Andy Adamson
bdac86e215 nfsd41: replace nfserr_resource in pure nfs41 responses
nfserr_resource is not a legal error for NFSv4.1. Replace it with
nfserr_serverfault for EXCHANGE_ID and CREATE_SESSION processing.

We will also need to map nfserr_resource to other errors in routines shared
by NFSv4.0 and NFSv4.1

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01 22:24:05 -04:00
Andy Adamson
a8dfdaeb7a nfsd41: use session maxreqs for sequence target and highest slotid
This fixes a bug in the sequence operation reply.

The sequence operation returns the highest slotid it will accept in the future
in sr_highest_slotid, and the highest slotid it prefers the client to use.
Since we do not re-negotiate the session slot table yet, these should both
always be set to the session ca_maxrequests.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01 22:24:05 -04:00
Andy Adamson
a649637c73 nfsd41: bound forechannel drc size by memory usage
By using the requested ca_maxresponsesize_cached * ca_maxresponses to bound
a forechannel drc request size, clients can tailor a session to usage.

For example, an I/O session (READ/WRITE only) can have a much smaller
ca_maxresponsesize_cached (for only WRITE compound responses) and a lot larger
ca_maxresponses to service a large in-flight data window.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01 22:24:05 -04:00
Trond Myklebust
a06b1261bd NFSD: Fix a bug in the NFSv4 'supported attrs' mandatory attribute
The fact that the filesystem doesn't currently list any alternate
locations does _not_ imply that the fs_locations attribute should be
marked as "unsupported".

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-09-01 20:00:17 -04:00
Andy Adamson
468de9e54a nfsd41: expand solo sequence check
Compounds consisting of only a sequence operation don't need any
additional caching beyond the sequence information we store in the slot
entry.  Fix nfsd4_is_solo_sequence to identify this case correctly.

The additional check for a failed sequence in nfsd4_store_cache_entry()
is redundant, since the nfsd4_is_solo_sequence call lower down catches
this case.

The final ce_cachethis set in nfsd4_sequence is also redundant.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-28 12:20:15 -04:00
Frank Filz
d8d0b85b11 nfsd4: remove ACE4_IDENTIFIER_GROUP flag from GROUP@ entry
RFC 3530 says "ACE4_IDENTIFIER_GROUP flag MUST be ignored on entries
with these special identifiers.  When encoding entries with these
special identifiers, the ACE4_IDENTIFIER_GROUP flag SHOULD be set to
zero."  It really shouldn't matter either way, but the point is that
this flag is used to distinguish named users from named groups (since
unix allows a group to have the same name as a user), so it doesn't
really make sense to use it on a special identifier such as this.)

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-27 17:35:41 -04:00
Wei Yongjun
b0401d7253 sunrpc: move the close processing after do recvfrom method
sunrpc: "Move close processing to a single place"
(d7979ae4a0) moved the
close processing before the recvfrom method. This may
cause the close processing never to execute. So this
patch moves it to the right place.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-27 17:18:38 -04:00
Benny Halevy
aaf84eb95a nfsd41: renew_client must be called under the state lock
Until we work out the state locking so we can use a spin lock to protect
the cl_lru, we need to take the state_lock to renew the client.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: Do not renew state on error]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: Simplify exit code]
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-27 17:17:40 -04:00
Wei Yongjun
eac81736e6 sunrpc: reply AUTH_BADCRED to RPCSEC_GSS with unknown service
When an RPC message is received with RPCSEC_GSS with an unknown service
(not RPC_GSS_SVC_NONE, RPC_GSS_SVC_INTEGRITY, or RPC_GSS_SVC_PRIVACY),
svcauth_gss_accept() returns AUTH_BADCRED, but svcauth_gss_release()
subsequently drops the response entirely, discarding the error.

Fix that so the AUTH_BADCRED error is returned to the client.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-25 17:39:43 -04:00
Ryusei Yamaguchi
ed2d8aed52 knfsd: Replace lock_kernel with a mutex in nfsd pool stats.
lock_kernel() in knfsd was replaced with a mutex. The later
commit 03cf6c9f49 ("knfsd:
add file to export stats about nfsd pools") did not follow
that change. This patch fixes the issue.

Also move the get and put of nfsd_serv to the open and close methods
(instead of start and stop methods) to allow atomic check and increment
of reference count in the open method (where we can still return an
error).

Signed-off-by: Ryusei Yamaguchi <mandel59@gmail.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Cc: Greg Banks <gnb@fmeh.org>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-25 12:39:37 -04:00
Frank Filz
55bb55dca0 nfsd: Fix unnecessary deny bits in NFSv4 ACL
The group deny entries end up denying tcy even though tcy was just
allowed by the allow entry. This appears to be due to:
	ace->access_mask = mask_from_posix(deny, flags);
instead of:
	ace->access_mask = deny_mask_from_posix(deny, flags);

Denying a previously allowed bit has no effect, so this shouldn't affect
behavior, but it's ugly.

Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-24 20:01:22 -04:00
Alexandros Batsakis
8f55f3c0a0 nfsd41: sunrpc: svc_tcp_recv_record()
Factor functionality out of svc_tcp_recvfrom() to simplify routine

Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-24 18:13:10 -04:00
Jeff Layton
fbf4665f41 nfsd: populate sin6_scope_id on callback address with scopeid from rq_addr on SETCLIENTID call
When a SETCLIENTID call comes in, one of the args given is the svc_rqst.
This struct contains an rq_addr field which holds the address that sent
the call. If this is an IPv6 address, then we can use the sin6_scope_id
field in this address to populate the sin6_scope_id field in the
callback address.

AFAICT, the rq_addr.sin6_scope_id is non-zero if and only if the client
mounted the server's link-local address.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21 11:27:44 -04:00
Jeff Layton
7077ecbabd nfsd: add support for NFSv4 callbacks over IPv6
The framework to add this is all in place. Now, add the code to allow
support for establishing a callback channel on an IPv6 socket.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21 11:27:44 -04:00
Jeff Layton
aa9a4ec770 nfsd: convert nfs4_cb_conn struct to hold address in sockaddr_storage
...rather than as a separate address and port fields. This will be
necessary for implementing callbacks over IPv6. Also, convert
gen_callback to use the standard rpcuaddr2sockaddr routine rather than
its own private one.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21 11:27:43 -04:00
Jeff Layton
363168b4ea nfsd: make nfs4_client->cl_addr a struct sockaddr_storage
It's currently a __be32, which isn't big enough to hold an IPv6 address.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21 11:27:43 -04:00
Jeff Layton
be3ad6b0b6 sunrpc: add common routine for copying address portion of a sockaddr
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21 11:27:43 -04:00
Jeff Layton
4516fc0454 sunrpc: add routine for comparing addresses
lockd needs these sort of routines, as does the NFSv4 callback code.

Move lockd's routines into common code and rename them so that they can
be used by others.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-08-21 11:27:42 -04:00
J. Bruce Fields
e9dc122166 Merge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 into for-2.6.32-incoming
Conflicts:
	net/sunrpc/cache.c
2009-08-21 11:27:29 -04:00
Trond Myklebust
405d8f8b1d SUNRPC: Ensure that sunrpc gets initialised before nfs, lockd, etc...
We can oops if rpc_pipefs isn't properly initialised before we start to set
up objects that depend upon it.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-21 08:17:56 -04:00
J. Bruce Fields
4dceef9675 nfs: fix compile error in rpc_pipefs.h
This include is needed for the definition of delayed_work.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-20 18:20:25 -04:00
Jan Kara
e1af88a1ad nfs: Remove reference to generic_osync_inode from a comment
generic_file_direct_write() no longer calls generic_osync_inode() so remove the
comment.

CC: linux-nfs@vger.kernel.org
CC: Neil Brown <neilb@suse.de>
CC: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19 19:48:08 -04:00
Trond Myklebust
f7e86ab92f SUNRPC: cache must take a reference to the cache detail's module on open()
Otherwise we Oops if the module containing the cache detail is removed
before all cache readers have closed the file.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19 18:22:16 -04:00
Trond Myklebust
7d7ea88289 NFS: Use the DNS resolver in the mount code.
In the referral code, use it to look up the new server's ip address if the
fs_locations attribute contains a hostname.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19 18:22:15 -04:00
Trond Myklebust
e571cbf1a4 NFS: Add a dns resolver for use with NFSv4 referrals and migration
The NFSv4 and NFSv4.1 protocols both allow for the redirection of a client
from one server to another in order to support filesystem migration and
replication. For full protocol support, we need to add the ability to
convert a DNS host name into an IP address that we can feed to the RPC
client.

We'll reuse the sunrpc cache, now that it has been converted to work with
rpc_pipefs.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19 18:22:15 -04:00
Trond Myklebust
96c61cbd0f SUNRPC: Fix a typo in cache_pipefs_files
We want the channel to be a regular file, so that we don't need to supply
rpc_pipe_ops.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-19 18:22:15 -04:00
Trond Myklebust
6a396f67d2 Merge branch 'nfsv4_xdr_cleanups-for-2.6.32' into nfs-for-2.6.32
Conflicts:
	fs/nfs/nfs4xdr.c
2009-08-19 18:21:52 -04:00
Benny Halevy
cccddf4f55 nfs: nfs4xdr: optimize low level decoding
do not increment decoding ptr if not needed.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 14:02:26 -04:00
Benny Halevy
c0eae66ece nfs: nfs4xdr: get rid of READ_BUF
Use xdr_inline_decode instead.
Open code debug printout and error return.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 14:02:23 -04:00
Benny Halevy
2460ba57c4 nfs: nfs4xdr: simplify decode_exchange_id by reusing decode_opaque_inline
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 14:02:20 -04:00
Benny Halevy
99398d0655 nfs: nfs4xdr: get rid of COPYMEM
Just directly call memcpy.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2009-08-14 14:02:17 -04:00