firefly-linux-kernel-4.4.55.git
15 years agonfsd41: modify nfsd4.1 backchannel to use new xprt class
Alexandros Batsakis [Thu, 10 Sep 2009 09:27:21 +0000 (12:27 +0300)]
nfsd41: modify nfsd4.1 backchannel to use new xprt class

This patch enables the use of the nfsv4.1 backchannel.

Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
[initialize rpc_create_args.bc_xprt too]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
15 years agonfsd41: Backchannel: Implement cb_recall over NFSv4.1
Ricardo Labiaga [Thu, 10 Sep 2009 09:27:04 +0000 (12:27 +0300)]
nfsd41: Backchannel: Implement cb_recall over NFSv4.1

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
[nfsd41: cb_recall callback]
[Share v4.0 and v4.1 back channel xdr]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[Share v4.0 and v4.1 back channel xdr]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: use nfsd4_cb_sequence for callback minorversion]
[nfsd41: conditionally decode_sequence in nfs4_xdr_dec_cb_recall]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: Backchannel: Add sequence arguments to callback RPC arguments]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
[pulled-in definition of nfsd4_cb_done]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
15 years agonfsd41: Backchannel: cb_sequence callback
Benny Halevy [Thu, 10 Sep 2009 09:26:51 +0000 (12:26 +0300)]
nfsd41: Backchannel: cb_sequence callback

Implement the cb_sequence callback conforming to draft-ietf-nfsv4-minorversion1

Note: highest slot id and target highest slot id do not have to be 0
as was previously implemented.  They can be greater than what the
nfs server sent if the client supports a larger slot table on the
backchannel.  At this point we just ignore that.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
[Rework the back channel xdr using the shared v4.0 and v4.1 framework.]
Signed-off-by: Andy Adamson <andros@netapp.com>
[fixed indentation]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: use nfsd4_cb_sequence for callback minorversion]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: fix verification of CB_SEQUENCE highest slot id[
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: Backchannel: Remove old backchannel serialization]
[nfsd41: Backchannel: First callback sequence ID should be 1]
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfsd41: decode_cb_sequence does not need to actually decode ignored fields]
Signed-off-by: Benny Halevy <bhalevy@panasas.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>
15 years agonfsd41: Backchannel: Setup sequence information
Ricardo Labiaga [Thu, 10 Sep 2009 09:26:38 +0000 (12:26 +0300)]
nfsd41: Backchannel: Setup sequence information

Follows the model used by the NFS client.  Setup the RPC prepare and done
function pointers so that we can populate the sequence information if
minorversion == 1.  rpc_run_task() is then invoked directly just like
existing NFS client operations do.

nfsd4_cb_prepare() determines if the sequence information needs to be setup.
If the slot is in use, it adds itself to the wait queue.

nfsd4_cb_done() wakes anyone sleeping on the callback channel wait queue
after our RPC reply has been received.  It also sets the task message
result pointer to NULL to clearly indicate we're done using it.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
[define and initialize cl_cb_seq_nr here]
[pulled out unused defintion of nfsd4_cb_done]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
15 years agonfsd41: Backchannel: Server backchannel RPC wait queue
Ricardo Labiaga [Thu, 10 Sep 2009 09:26:25 +0000 (12:26 +0300)]
nfsd41: Backchannel: Server backchannel RPC wait queue

RPC callback requests will wait on this wait queue if the backchannel
is out of slots.

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>
15 years agonfsd41: Backchannel: Add sequence arguments to callback RPC arguments
Ricardo Labiaga [Thu, 10 Sep 2009 09:26:12 +0000 (12:26 +0300)]
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>
15 years agonfsd41: Backchannel: callback infrastructure
Andy Adamson [Thu, 10 Sep 2009 09:25:59 +0000 (12:25 +0300)]
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>
15 years agonfsd4: use common rpc_cred for all callbacks
J. Bruce Fields [Tue, 15 Sep 2009 22:07:35 +0000 (18:07 -0400)]
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>
15 years agonfsd4: allow nfs4 state startup to fail
J. Bruce Fields [Tue, 15 Sep 2009 19:56:50 +0000 (15:56 -0400)]
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>
15 years agoSUNRPC: Defer the auth_gss upcall when the RPC call is asynchronous
Trond Myklebust [Tue, 15 Sep 2009 17:32:13 +0000 (13:32 -0400)]
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>
15 years agonfsd4: fix null dereference creating nfsv4 callback client
J. Bruce Fields [Tue, 15 Sep 2009 16:22:42 +0000 (12:22 -0400)]
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>
15 years agonfsd4: fix whitespace in NFSPROC4_CLNT_CB_NULL definition
Benny Halevy [Thu, 10 Sep 2009 09:25:46 +0000 (12:25 +0300)]
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>
15 years agonfsd41: sunrpc: add new xprt class for nfsv4.1 backchannel
Alexandros Batsakis [Thu, 10 Sep 2009 14:33:30 +0000 (17:33 +0300)]
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>
15 years agosunrpc/cache: simplify cache_fresh_locked and cache_fresh_unlocked.
NeilBrown [Wed, 9 Sep 2009 06:32:54 +0000 (16:32 +1000)]
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 4013edea9a0b6cdcb1fdf5d4011e47e068fd6efb

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>
15 years agosunrpc/cache: change cache_defer_req to return -ve error, not boolean.
NeilBrown [Wed, 9 Sep 2009 06:32:54 +0000 (16:32 +1000)]
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>
15 years agonfsd41: sunrpc: Added rpc server-side backchannel handling
Rahul Iyer [Thu, 10 Sep 2009 14:32:28 +0000 (17:32 +0300)]
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>
15 years agonfsd41: sunrpc: move struct rpc_buffer def into sunrpc.h
Benny Halevy [Thu, 10 Sep 2009 09:25:04 +0000 (12:25 +0300)]
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>
15 years agonfsd: fix leak on error in nfsv3 readdir
J. Bruce Fields [Fri, 4 Sep 2009 18:40:36 +0000 (14:40 -0400)]
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>
15 years agonfsd: clean up readdirplus encoding
J. Bruce Fields [Fri, 4 Sep 2009 18:13:09 +0000 (14:13 -0400)]
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>
15 years agonfsd4: filehandle leak or error exit from fh_compose()
J. Bruce Fields [Fri, 4 Sep 2009 15:59:32 +0000 (11:59 -0400)]
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>
15 years agoNFSd: Fix filehandle leak in exp_pseudoroot() and nfsd4_path()
Trond Myklebust [Wed, 2 Sep 2009 20:48:32 +0000 (16:48 -0400)]
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>
15 years agonfsd: move fsid_type choice out of fh_compose
J. Bruce Fields [Wed, 2 Sep 2009 23:50:40 +0000 (19:50 -0400)]
nfsd: move fsid_type choice out of fh_compose

More trivial cleanup.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
15 years agonfsd: move some of fh_compose into helper functions
J. Bruce Fields [Wed, 2 Sep 2009 23:31:32 +0000 (19:31 -0400)]
nfsd: move some of fh_compose into helper functions

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
15 years agonfsd41: replace page based DRC with buffer based DRC
Andy Adamson [Fri, 28 Aug 2009 12:45:04 +0000 (08:45 -0400)]
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>
15 years agonfsd41: replace nfserr_resource in pure nfs41 responses
Andy Adamson [Fri, 28 Aug 2009 12:45:03 +0000 (08:45 -0400)]
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>
15 years agonfsd41: use session maxreqs for sequence target and highest slotid
Andy Adamson [Fri, 28 Aug 2009 12:45:02 +0000 (08:45 -0400)]
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>
15 years agonfsd41: bound forechannel drc size by memory usage
Andy Adamson [Fri, 28 Aug 2009 12:45:01 +0000 (08:45 -0400)]
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>
15 years agoNFSD: Fix a bug in the NFSv4 'supported attrs' mandatory attribute
Trond Myklebust [Mon, 31 Aug 2009 19:16:11 +0000 (15:16 -0400)]
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>
15 years agonfsd41: expand solo sequence check
Andy Adamson [Thu, 27 Aug 2009 16:07:40 +0000 (12:07 -0400)]
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>
15 years agonfsd4: remove ACE4_IDENTIFIER_GROUP flag from GROUP@ entry
Frank Filz [Thu, 27 Aug 2009 21:35:41 +0000 (17:35 -0400)]
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>
15 years agosunrpc: move the close processing after do recvfrom method
Wei Yongjun [Thu, 27 Aug 2009 02:23:39 +0000 (10:23 +0800)]
sunrpc: move the close processing after do recvfrom method

sunrpc: "Move close processing to a single place"
(d7979ae4a050a45b78af51832475001b68263d2a) 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>
15 years agonfsd41: renew_client must be called under the state lock
Benny Halevy [Thu, 20 Aug 2009 00:21:56 +0000 (03:21 +0300)]
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>
15 years agosunrpc: reply AUTH_BADCRED to RPCSEC_GSS with unknown service
Wei Yongjun [Tue, 4 Aug 2009 09:27:52 +0000 (17:27 +0800)]
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>
15 years agoknfsd: Replace lock_kernel with a mutex in nfsd pool stats.
Ryusei Yamaguchi [Sat, 15 Aug 2009 15:54:41 +0000 (00:54 +0900)]
knfsd: Replace lock_kernel with a mutex in nfsd pool stats.

lock_kernel() in knfsd was replaced with a mutex. The later
commit 03cf6c9f49a8fea953d38648d016e3f46e814991 ("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>
15 years agonfsd: Fix unnecessary deny bits in NFSv4 ACL
Frank Filz [Fri, 14 Aug 2009 22:02:30 +0000 (15:02 -0700)]
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>
15 years agonfsd41: sunrpc: svc_tcp_recv_record()
Alexandros Batsakis [Thu, 20 Aug 2009 00:34:19 +0000 (03:34 +0300)]
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>
15 years agonfsd: populate sin6_scope_id on callback address with scopeid from rq_addr on SETCLIE...
Jeff Layton [Fri, 14 Aug 2009 16:57:59 +0000 (12:57 -0400)]
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>
15 years agonfsd: add support for NFSv4 callbacks over IPv6
Jeff Layton [Fri, 14 Aug 2009 16:57:58 +0000 (12:57 -0400)]
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>
15 years agonfsd: convert nfs4_cb_conn struct to hold address in sockaddr_storage
Jeff Layton [Fri, 14 Aug 2009 16:57:57 +0000 (12:57 -0400)]
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>
15 years agonfsd: make nfs4_client->cl_addr a struct sockaddr_storage
Jeff Layton [Fri, 14 Aug 2009 16:57:56 +0000 (12:57 -0400)]
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>
15 years agosunrpc: add common routine for copying address portion of a sockaddr
Jeff Layton [Fri, 14 Aug 2009 16:57:55 +0000 (12:57 -0400)]
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>
15 years agosunrpc: add routine for comparing addresses
Jeff Layton [Fri, 14 Aug 2009 16:57:54 +0000 (12:57 -0400)]
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>
15 years agoMerge branch 'nfs-for-2.6.32' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6...
J. Bruce Fields [Fri, 21 Aug 2009 15:27:29 +0000 (11:27 -0400)]
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

15 years agoSUNRPC: Ensure that sunrpc gets initialised before nfs, lockd, etc...
Trond Myklebust [Fri, 21 Aug 2009 12:17:56 +0000 (08:17 -0400)]
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>
15 years agonfs: fix compile error in rpc_pipefs.h
J. Bruce Fields [Thu, 20 Aug 2009 21:08:39 +0000 (17:08 -0400)]
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>
15 years agonfs: Remove reference to generic_osync_inode from a comment
Jan Kara [Wed, 19 Aug 2009 16:04:43 +0000 (18:04 +0200)]
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>
15 years agoSUNRPC: cache must take a reference to the cache detail's module on open()
Trond Myklebust [Wed, 19 Aug 2009 22:13:00 +0000 (18:13 -0400)]
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>
15 years agoNFS: Use the DNS resolver in the mount code.
Trond Myklebust [Wed, 19 Aug 2009 22:12:34 +0000 (18:12 -0400)]
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>
15 years agoNFS: Add a dns resolver for use with NFSv4 referrals and migration
Trond Myklebust [Wed, 19 Aug 2009 22:12:27 +0000 (18:12 -0400)]
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>
15 years agoSUNRPC: Fix a typo in cache_pipefs_files
Trond Myklebust [Wed, 19 Aug 2009 22:12:21 +0000 (18:12 -0400)]
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>
15 years agoMerge branch 'nfsv4_xdr_cleanups-for-2.6.32' into nfs-for-2.6.32
Trond Myklebust [Wed, 19 Aug 2009 22:21:52 +0000 (18:21 -0400)]
Merge branch 'nfsv4_xdr_cleanups-for-2.6.32' into nfs-for-2.6.32

Conflicts:
fs/nfs/nfs4xdr.c

15 years agonfs: nfs4xdr: optimize low level decoding
Benny Halevy [Fri, 14 Aug 2009 14:20:19 +0000 (17:20 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of READ_BUF
Benny Halevy [Fri, 14 Aug 2009 14:20:14 +0000 (17:20 +0300)]
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>
15 years agonfs: nfs4xdr: simplify decode_exchange_id by reusing decode_opaque_inline
Benny Halevy [Fri, 14 Aug 2009 14:20:10 +0000 (17:20 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of COPYMEM
Benny Halevy [Fri, 14 Aug 2009 14:20:05 +0000 (17:20 +0300)]
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>
15 years agonfs: nfs4xdr: introduce decode_sessionid helper
Benny Halevy [Fri, 14 Aug 2009 14:20:00 +0000 (17:20 +0300)]
nfs: nfs4xdr: introduce decode_sessionid helper

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
15 years agonfs: nfs4xdr: introduce decode_verifier helper
Benny Halevy [Fri, 14 Aug 2009 14:19:56 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: introduce decode_opaque_fixed and decode_stateid helpers
Benny Halevy [Fri, 14 Aug 2009 14:19:52 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: introduce print_overflow_msg
Benny Halevy [Fri, 14 Aug 2009 14:19:48 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of READTIME
Benny Halevy [Fri, 14 Aug 2009 14:19:44 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of READ64
Benny Halevy [Fri, 14 Aug 2009 14:19:41 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of READ32
Benny Halevy [Fri, 14 Aug 2009 14:19:37 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: merge xdr_encode_int+xdr_encode_opaque_fixed into xdr_encode_opaque
Benny Halevy [Fri, 14 Aug 2009 14:19:34 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: optimize low level encoding
Benny Halevy [Fri, 14 Aug 2009 14:19:30 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: change RESERVE_SPACE macro into a static helper
Benny Halevy [Fri, 14 Aug 2009 14:19:25 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: encode_compound_hdr does not have to round up reserved bytes
Benny Halevy [Fri, 14 Aug 2009 14:19:18 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: optimize RESERVE_SPACE in encode_create_session and encode_sequence
Benny Halevy [Fri, 14 Aug 2009 14:19:13 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of WRITEMEM
Benny Halevy [Fri, 14 Aug 2009 14:19:06 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of WRITE64
Benny Halevy [Fri, 14 Aug 2009 14:19:01 +0000 (17:19 +0300)]
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>
15 years agonfs: nfs4xdr: get rid of WRITE32
Benny Halevy [Fri, 14 Aug 2009 14:18:54 +0000 (17:18 +0300)]
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>
15 years agosunrpc: ntoh -> be*_to_cpu
Benny Halevy [Fri, 14 Aug 2009 14:18:49 +0000 (17:18 +0300)]
sunrpc: ntoh -> be*_to_cpu

ntohl is already defined as be32_to_cpu.
be64_to_cpu has architecture specific optimized implementations.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
15 years agosunrpc: hton -> cpu_to_be*
Benny Halevy [Fri, 14 Aug 2009 14:18:44 +0000 (17:18 +0300)]
sunrpc: hton -> cpu_to_be*

htonl is already defined as cpu_to_be32.
cpu_to_be64 has architecture specific optimized implementations.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
15 years agoLinux 2.6.31-rc6
Linus Torvalds [Thu, 13 Aug 2009 22:43:34 +0000 (15:43 -0700)]
Linux 2.6.31-rc6

15 years agogenirq: prevent wakeup of freed irq thread
Linus Torvalds [Thu, 13 Aug 2009 20:05:10 +0000 (13:05 -0700)]
genirq: prevent wakeup of freed irq thread

free_irq() can remove an irqaction while the corresponding interrupt
is in progress, but free_irq() sets action->thread to NULL
unconditionally, which might lead to a NULL pointer dereference in
handle_IRQ_event() when the hard interrupt context tries to wake up
the handler thread.

Prevent this by moving the thread stop after synchronize_irq(). No
need to set action->thread to NULL either as action is going to be
freed anyway.

This fixes a boot crash reported against preempt-rt which uses the
mainline irq threads code to implement full irq threading.

[ tglx: removed local irqthread variable ]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
15 years agoMerge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Thu, 13 Aug 2009 19:24:33 +0000 (12:24 -0700)]
Merge branch 'perfcounters-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf_counter: Report the cloning task as parent on perf_counter_fork()
  perf_counter: Fix an ipi-deadlock
  perf: Rework/fix the whole read vs group stuff
  perf_counter: Fix swcounter context invariance
  perf report: Don't show unresolved DSOs and symbols when -S/-d is used
  perf tools: Add a general option to enable raw sample records
  perf tools: Add a per tracepoint counter attribute to get raw sample
  perf_counter: Provide hw_perf_counter_setup_online() APIs
  perf list: Fix large list output by using the pager
  perf_counter, x86: Fix/improve apic fallback
  perf record: Add missing -C option support for specifying profile cpu
  perf tools: Fix dso__new handle() to handle deleted DSOs
  perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not available
  perf report: Show the tid too in -D
  perf record: Fix .tid and .pid fill-in when synthesizing events
  perf_counter, x86: Fix generic cache events on P6-mobile CPUs
  perf_counter, x86: Fix lapic printk message

15 years agoMerge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 13 Aug 2009 19:09:16 +0000 (12:09 -0700)]
Merge branch 'core-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  futex: Fix handling of bad requeue syscall pairing
  futex: Fix compat_futex to be same as futex for REQUEUE_PI
  locking, sched: Give waitqueue spinlocks their own lockdep classes
  futex: Update futex_q lock_ptr on requeue proxy lock

15 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 13 Aug 2009 19:08:44 +0000 (12:08 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix oops in identify_cpu() on CPUs without CPUID
  x86: Clear incorrectly forced X86_FEATURE_LAHF_LM flag
  x86, mce: therm_throt - change when we print messages
  x86: Add reboot quirk for every 5 series MacBook/Pro

15 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec...
Linus Torvalds [Thu, 13 Aug 2009 18:17:40 +0000 (11:17 -0700)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jlbec/ocfs2

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (22 commits)
  ocfs2: Fix possible deadlock when extending quota file
  ocfs2: keep index within status_map[]
  ocfs2: Initialize the cluster we're writing to in a non-sparse extend
  ocfs2: Remove redundant BUG_ON in __dlm_queue_ast()
  ocfs2/quota: Release lock for error in ocfs2_quota_write.
  ocfs2: Define credit counts for quota operations
  ocfs2: Remove syncjiff field from quota info
  ocfs2: Fix initialization of blockcheck stats
  ocfs2: Zero out padding of on disk dquot structure
  ocfs2: Initialize blocks allocated to local quota file
  ocfs2: Mark buffer uptodate before calling ocfs2_journal_access_dq()
  ocfs2: Make global quota files blocksize aligned
  ocfs2: Use ocfs2_rec_clusters in ocfs2_adjust_adjacent_records.
  ocfs2: Fix deadlock on umount
  ocfs2: Add extra credits and access the modified bh in update_edge_lengths.
  ocfs2: Fail ocfs2_get_block() immediately when a block needs allocation
  ocfs2: Fix error return in ocfs2_write_cluster()
  ocfs2: Fix compilation warning for fs/ocfs2/xattr.c
  ocfs2: Initialize count in aio_write before generic_write_checks
  ocfs2: log the actual return value of ocfs2_file_aio_write()
  ...

15 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Thu, 13 Aug 2009 17:59:29 +0000 (10:59 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: allow upper limit for resync/reshape to be set when array is read-only
  md/raid5: Properly remove excess drives after shrinking a raid5/6
  md/raid5: make sure a reshape restarts at the correct address.
  md/raid5: allow new reshape modes to be restarted in the middle.
  md: never advance 'events' counter by more than 1.
  Remove deadlock potential in md_open

15 years agoMerge branch 'sh/for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...
Linus Torvalds [Thu, 13 Aug 2009 17:57:53 +0000 (10:57 -0700)]
Merge branch 'sh/for-2.6.31' of git://git./linux/kernel/git/lethal/sh-2.6

* 'sh/for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
  sh: fix i2c init order on ap325rxa V2
  sh: fix i2c init order on Migo-R V2
  sh: convert processor device setup functions to arch_initcall()

15 years agoMake sock_sendpage() use kernel_sendpage()
Linus Torvalds [Thu, 13 Aug 2009 15:28:36 +0000 (08:28 -0700)]
Make sock_sendpage() use kernel_sendpage()

kernel_sendpage() does the proper default case handling for when the
socket doesn't have a native sendpage implementation.

Now, arguably this might be something that we could instead solve by
just specifying that all protocols should do it themselves at the
protocol level, but we really only care about the common protocols.
Does anybody really care about sendpage on something like Appletalk? Not
likely.

Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Julien TINNES <julien@cr0.org>
Acked-by: Tavis Ormandy <taviso@sdf.lonestar.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoperf_counter: Report the cloning task as parent on perf_counter_fork()
Peter Zijlstra [Thu, 13 Aug 2009 14:14:42 +0000 (16:14 +0200)]
perf_counter: Report the cloning task as parent on perf_counter_fork()

A bug in (9f498cc: perf_counter: Full task tracing) makes
profiling multi-threaded apps it go belly up.

[ output as: (PID:TID):(PPID:PTID) ]

 # ./perf report -D | grep FORK
0x4b0 [0x18]: PERF_EVENT_FORK: (3237:3237):(3236:3236)
0xa10 [0x18]: PERF_EVENT_FORK: (3237:3238):(3236:3236)
0xa70 [0x18]: PERF_EVENT_FORK: (3237:3239):(3236:3236)
0xad0 [0x18]: PERF_EVENT_FORK: (3237:3240):(3236:3236)
0xb18 [0x18]: PERF_EVENT_FORK: (3237:3241):(3236:3236)

Shows us that the test (27d028d perf report: Update for the new
FORK/EXIT events) in builtin-report.c:

        /*
         * A thread clone will have the same PID for both
         * parent and child.
         */
        if (thread == parent)
                return 0;

Will clearly fail.

The problem is that perf_counter_fork() reports the actual
parent, instead of the cloning thread.

Fixing that (with the below patch), yields:

 # ./perf report -D | grep FORK
0x4c8 [0x18]: PERF_EVENT_FORK: (1590:1590):(1589:1589)
0xbd8 [0x18]: PERF_EVENT_FORK: (1590:1591):(1590:1590)
0xc80 [0x18]: PERF_EVENT_FORK: (1590:1592):(1590:1590)
0x3338 [0x18]: PERF_EVENT_FORK: (1590:1593):(1590:1590)
0x66b0 [0x18]: PERF_EVENT_FORK: (1590:1594):(1590:1590)

Which both makes more sense and doesn't confuse perf report
anymore.

Reported-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: paulus@samba.org
Cc: Anton Blanchard <anton@samba.org>
Cc: Arjan van de Ven <arjan@infradead.org>
LKML-Reference: <1250172882.5241.62.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf_counter: Fix an ipi-deadlock
Peter Zijlstra [Thu, 13 Aug 2009 09:47:54 +0000 (11:47 +0200)]
perf_counter: Fix an ipi-deadlock

perf_pending_counter() is called from IRQ context and will call
perf_counter_disable(), however perf_counter_disable() uses
smp_call_function_single() which doesn't fancy being used with
IRQs disabled due to IPI deadlocks.

Fix this by making it use the local __perf_counter_disable()
call and teaching the counter_sched_out() code about pending
disables as well.

This should cover the case where a counter migrates before the
pending queue gets processed.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey J Ashford <cjashfor@us.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: stephane eranian <eranian@googlemail.com>
LKML-Reference: <20090813103655.244097721@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf: Rework/fix the whole read vs group stuff
Peter Zijlstra [Thu, 13 Aug 2009 09:47:53 +0000 (11:47 +0200)]
perf: Rework/fix the whole read vs group stuff

Replace PERF_SAMPLE_GROUP with PERF_SAMPLE_READ and introduce
PERF_FORMAT_GROUP to deal with group reads in a more generic
way.

This allows you to get group reads out of read() as well.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey J Ashford <cjashfor@us.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: stephane eranian <eranian@googlemail.com>
LKML-Reference: <20090813103655.117411814@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf_counter: Fix swcounter context invariance
Peter Zijlstra [Thu, 13 Aug 2009 07:51:55 +0000 (09:51 +0200)]
perf_counter: Fix swcounter context invariance

perf_swcounter_is_counting() uses a lock, which means we cannot
use swcounters from NMI or when holding that particular lock,
this is unintended.

The below removes the lock, this opens up race window, but not
worse than the swcounters already experience due to RCU
traversal of the context in perf_swcounter_ctx_event().

This also fixes the hard lockups while opening a lockdep
tracepoint counter.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: stephane eranian <eranian@googlemail.com>
Cc: Corey J Ashford <cjashfor@us.ibm.com>
LKML-Reference: <1250149915.10001.66.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf report: Don't show unresolved DSOs and symbols when -S/-d is used
Arnaldo Carvalho de Melo [Wed, 12 Aug 2009 21:19:57 +0000 (18:19 -0300)]
perf report: Don't show unresolved DSOs and symbols when -S/-d is used

We're interested in just those symbols/DSOs, so filter out the
unresolved ones.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20090812211957.GE3495@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf tools: Add a general option to enable raw sample records
Frederic Weisbecker [Thu, 13 Aug 2009 08:27:19 +0000 (10:27 +0200)]
perf tools: Add a general option to enable raw sample records

While we can enable the perf sample records per tracepoint
counter, we may also want to enable this option for every
tracepoint counters to open, so that we don't need to add a
:record flag for all of them.

Add the -R, --raw-samples options for this purpose.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1250152039-7284-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf tools: Add a per tracepoint counter attribute to get raw sample
Frederic Weisbecker [Thu, 13 Aug 2009 08:27:18 +0000 (10:27 +0200)]
perf tools: Add a per tracepoint counter attribute to get raw sample

Add a new flag field while opening a tracepoint perf counter:

-e tracepoint_subsystem:tracepoint_name:flags

This is intended to be generic although for now it only supports the
r[e[c[o[r[d]]]]] flag:

./perf record -e workqueue:workqueue_insertion:record
./perf record -e workqueue:workqueue_insertion:r

will have the same effect: enabling the raw samples record for
the given tracepoint counter.

In the future, we may want to support further flags, separated
by commas.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1250152039-7284-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf_counter: Provide hw_perf_counter_setup_online() APIs
Ingo Molnar [Thu, 13 Aug 2009 08:13:22 +0000 (10:13 +0200)]
perf_counter: Provide hw_perf_counter_setup_online() APIs

Provide weak aliases for hw_perf_counter_setup_online(). This is
used by the BTS patches (for v2.6.32), but it interacts with
fixes so propagate this upstream. (it has no effect as of yet)

Also export perf_counter_output() to architecture code.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoperf list: Fix large list output by using the pager
Arnaldo Carvalho de Melo [Wed, 12 Aug 2009 17:44:59 +0000 (14:44 -0300)]
perf list: Fix large list output by using the pager

When /sys/kernel/debug is mounted the list can be imense, so
use the pager like the other tools.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20090812174459.GB3495@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agosh: fix i2c init order on ap325rxa V2
Magnus Damm [Fri, 7 Aug 2009 03:52:18 +0000 (03:52 +0000)]
sh: fix i2c init order on ap325rxa V2

Convert the AP325RXA board code to register devices at
arch_initcall() time instead of device_initcall(). This
fix unbreaks pcf8563 RTC driver support.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
15 years agosh: fix i2c init order on Migo-R V2
Magnus Damm [Thu, 13 Aug 2009 02:39:02 +0000 (11:39 +0900)]
sh: fix i2c init order on Migo-R V2

Convert the Migo-R board code to register devices at
arch_initcall() time instead of __initcall(). This fix
unbreaks migor_ts touch screen driver support.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
15 years agosh: convert processor device setup functions to arch_initcall()
Magnus Damm [Wed, 22 Jul 2009 15:14:29 +0000 (15:14 +0000)]
sh: convert processor device setup functions to arch_initcall()

Convert the processor platform device setup
functions from __initcall() and sometimes
device_initcall() to arch_initcall().

This makes sure that the platform devices are
registered a bit earlier so the devices are
available when drivers register using initcall
levels earlier than device_initcall().

A good example is platform devices needed by
i2c-sh_mobile.c which registers a bit earlier
using subsys_initcall().

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
15 years agomd: allow upper limit for resync/reshape to be set when array is read-only
NeilBrown [Thu, 13 Aug 2009 00:41:50 +0000 (10:41 +1000)]
md: allow upper limit for resync/reshape to be set when array is read-only

Normally we only allow the upper limit for a reshape to be decreased
when the array not performing a sync/recovery/reshape, otherwise there
could be races.  But if an array is part-way through a reshape when it
is assembled the reshape is started immediately leaving no window
to set an upper bound.

If the array is started read-only, the reshape will be suspended until
the array becomes writable, so that provides a window during which it
is perfectly safe to reduce the upper limit of a reshape.

So: allow the upper limit (sync_max) to be reduced even if the reshape
thread is running, as long as the array is still read-only.

Signed-off-by: NeilBrown <neilb@suse.de>
15 years agomd/raid5: Properly remove excess drives after shrinking a raid5/6
NeilBrown [Thu, 13 Aug 2009 00:41:49 +0000 (10:41 +1000)]
md/raid5: Properly remove excess drives after shrinking a raid5/6

We were removing the drives, from the array, but not
removing symlinks from /sys/.... and not marking the device
as having been removed.

Signed-off-by: NeilBrown <neilb@suse.de>
15 years agomd/raid5: make sure a reshape restarts at the correct address.
NeilBrown [Thu, 13 Aug 2009 00:13:00 +0000 (10:13 +1000)]
md/raid5: make sure a reshape restarts at the correct address.

This "if" don't allow for the possibility that the number of devices
doesn't change, and so sector_nr isn't set correctly in that case.
So change '>' to '>='.

Signed-off-by: NeilBrown <neilb@suse.de>
15 years agomd/raid5: allow new reshape modes to be restarted in the middle.
NeilBrown [Thu, 13 Aug 2009 00:06:24 +0000 (10:06 +1000)]
md/raid5: allow new reshape modes to be restarted in the middle.

md/raid5 doesn't allow a reshape to restart if it involves writing
over the same part of disk that it would be reading from.
This happens at the beginning of a reshape that increases the number
of devices, at the end of a reshape that decreases the number of
devices, and continuously for a reshape that does not change the
number of devices.

The current code is correct for the "increase number of devices"
case as the critical section at the start is handled by userspace
performing a backup.

It does not work for reducing the number of devices, or the
no-change case.
For 'reducing', we need to invert the test.  For no-change we cannot
really be sure things will be safe, so simply require the array
to be read-only, which is how the user-space code which carefully
starts such arrays works.

Signed-off-by: NeilBrown <neilb@suse.de>
15 years agomd: never advance 'events' counter by more than 1.
NeilBrown [Wed, 12 Aug 2009 23:54:02 +0000 (09:54 +1000)]
md: never advance 'events' counter by more than 1.

When assembling arrays, md allows two devices to have different event
counts as long as the difference is only '1'.  This is to cope with
a system failure between updating the metadata on two difference
devices.

However there are currently times when we update the event count by
2.  This was done to keep the event count even when the array is clean
and odd when it is dirty, which allows us to avoid writing common
update to spare devices and so allow those spares to go to sleep.

This is bad for the above reason.  So change it to never increase by
two.  This means that the alignment between 'odd/even' and
'clean/dirty' might take a little longer to attain, but that is only a
small cost.  The spares will get a few more updates but that will
still be spared (;-) most updates and can still go to sleep.

Prior to this patch there was a small chance that after a crash an
array would fail to assemble due to the overly large event count
mismatch.

Signed-off-by: NeilBrown <neilb@suse.de>
15 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Wed, 12 Aug 2009 16:55:46 +0000 (09:55 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Remove double removal of blktrace directory

15 years agoRemove double removal of blktrace directory
Alan D. Brunelle [Fri, 7 Aug 2009 16:01:08 +0000 (12:01 -0400)]
Remove double removal of blktrace directory

commit fd51d251e4cdb21f68e9dbc4336514d64a105a79
Author: Stefan Raspl <raspl@linux.vnet.ibm.com>
Date:   Tue May 19 09:59:08 2009 +0200

    blktrace: remove debugfs entries on bad path

added in an explicit invocation of debugfs_remove for bt->dir, in
blk_remove_buf_file_callback we are also getting the directory removed. On
occasion I am seeing memory corruption that I have bisected down to
this commit. [The testing involves a (long) series of I/O benchmarks
with blktrace invoked around the actual runs.] I believe that this
committed patch is correct, but the problem actually lies in the code
in blk_remove_buf_file_callback.

With this patch I am able to consistently get complete runs whereas
previously I could not get a single run to complete.

The first part of the patch simply moves the debugfs_remove below the
relay_close: the relay_close call will remove files under bt->dir, and
so we should not remove the directory until all the files we created
have been removed. (Note: This is not sufficient to fix the problem -
the file system code has ref counts on the directoy, so our invocation
does not cause the directory to actually be removed. Nonetheless, we
should not rely upon that feature.)

Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>