Commit Graph

210707 Commits

Author SHA1 Message Date
Pavel Emelyanov
7dfe1fc362 sunrpc: Pass family to setup_socket calls
Now we have a single socket creation routine and can call it
directly from the setup_socket routines.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:15 -04:00
Pavel Emelyanov
6bc9638ab4 sunrpc: Merge xs_create_sock code
After xs_bind is merged it's easy to merge its callers.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
[bfields@redhat.com: fix address family initialization]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:15 -04:00
Pavel Emelyanov
beb59b6828 sunrpc: Merge the xs_bind code
There's the only difference betseen the xs_bind4 and the
xs_bind6 - the size of sockaddr structure they use.

Fortunatelly its size can be indirectly get from the transport.

Change since v1:
* use sockaddr_storage instead of sockaddr
* use rpc_set_port instead of manual port assigning

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
[bfields@redhat.com: fix address family initialization]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:15 -04:00
Pavel Emelyanov
573018c07e sunrpc: Call xs_create_sockX directly from setup_socket
Remove now unneeded wrappers that just add type and protocol
to socket creation callback.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:15 -04:00
Pavel Emelyanov
22d44a7d8a sunrpc: Factor out v6 sockets creation
Same patch for v6 protocols.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:15 -04:00
Pavel Emelyanov
22f793268d sunrpc: Factor out v4 sockets creation
The UDPv4 and TCPv4 socket creation callbacks now look very similar.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:14 -04:00
Pavel Emelyanov
b65c031061 sunrpc: Factor out udp sockets creation
Make it look like the TCP sockets creation.
Unfortunately the git diff made the patch look messy :(

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:14 -04:00
Pavel Emelyanov
58dddac9c5 sunrpc: Remove duplicate xprt/transport arguments from calls
The xs_tcp_reuse_connection takes the xprt only to pass it down
to the xs_abort_connection. The later one can get it from the given
transport itself.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:14 -04:00
Pavel Emelyanov
a9f5f0f7bf sunrpc: Get xprt pointer once in xs_tcp_setup_socket
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:14 -04:00
Pavel Emelyanov
baaf4e487a sunrpc: Remove unused sock arg from xs_next_srcport
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:14 -04:00
Pavel Emelyanov
5d4ec93297 sunrpc: Remove unused sock arg from xs_get_srcport
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19 10:48:14 -04:00
Tom Tucker
4a84386fc2 svcrdma: Cleanup DMA unmapping in error paths.
There are several error paths in the code that do not unmap DMA. This
patch adds calls to svc_rdma_unmap_dma to free these DMA contexts.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-18 19:51:32 -04:00
Tom Tucker
b432e6b3d9 svcrdma: Change DMA mapping logic to avoid the page_address kernel API
There was logic in the send path that assumed that a page containing data
to send to the client has a KVA. This is not always the case and can result
in data corruption when page_address returns zero and we end up DMA mapping
zero.

This patch changes the bus mapping logic to avoid page_address() where
necessary and converts all calls from ib_dma_map_single to ib_dma_map_page
in order to keep the map/unmap calls symmetric.

Signed-off-by: Tom Tucker <tom@ogc.us>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-18 19:51:31 -04:00
J. Bruce Fields
ecec6e34e1 nfsd4: expire clients more promptly
Expire clients more promptly, at the expense of possibly running the
laundromat thread more frequently.

Though it's not the default, I'd like it to be feasible to run with a
lease time of just a few seconds, at which point a minimum 10 second
wait between laundromat runs seems a little much.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-11 20:00:18 -04:00
Pavel Emelyanov
70dc78da2c sunrpc: Use helper to set v4 mapped addr in ip_map_parse
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-11 20:00:17 -04:00
NeilBrown
e33534d54f sunrpc/cache: centralise handling of size limit on deferred list.
We limit the number of 'defer' requests to DFR_MAX.

The imposition of this limit is spread about a bit - sometime we don't
add new things to the list, sometimes we remove old things.

Also it is currently applied to requests which we are 'waiting' for
rather than 'deferring'.  This doesn't seem ideal as 'waiting'
requests are naturally limited by the number of threads.

So gather the DFR_MAX handling code to one place and only apply it to
requests that are actually being deferred.

This means that not all 'cache_deferred_req' structures go on the
'cache_defer_list, so we need to be careful when adding and removing
things.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-11 19:30:28 -04:00
NeilBrown
d29068c431 sunrpc: Simplify cache_defer_req and related functions.
The return value from cache_defer_req is somewhat confusing.
Various different error codes are returned, but the single caller is
only interested in success or failure.

In fact it can measure this success or failure itself by checking
CACHE_PENDING, which makes the point of the code more explicit.

So change cache_defer_req to return 'void' and test CACHE_PENDING
after it completes, to see if the request was actually deferred or
not.

Similarly setup_deferral and cache_wait_req don't need a return value,
so make them void and remove some code.

The call to cache_revisit_request (to guard against a race) is only
needed for the second call to setup_deferral, so move it out of
setup_deferral to after that second call.  With the first call the
race is handled differently (by explicitly calling
'wait_for_completion').

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-11 19:30:27 -04:00
J. Bruce Fields
3351514215 nfsd4: return expired on unfound stateid's
Commit 78155ed75f "nfsd4: distinguish
expired from stale stateids" attempted to distinguish expired and stale
stateid's using time information that may not have been completely
reliable, so I reverted it.

That was throwing out the baby with the bathwater; we still do want to
return expired, but let's do that using the simpler approach of just
assuming any stateid is expired if it looks like it was given out by the
current server instance, but we can't find it any more.

This may help clients that are recovering from network partitions.

Reported-by: Bian Naimeng <biannm@cn.fujitsu.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-02 18:49:33 -04:00
J. Bruce Fields
328ead2872 nfsd4: add new connections to session
As long as we're not implementing any session security, we should just
automatically add any new connections that come along to the list of
sessions associated with the session.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 19:29:45 -04:00
J. Bruce Fields
db90681d6e nfsd4: refactor connection allocation
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 19:29:45 -04:00
J. Bruce Fields
19cf5c026f nfsd4: use callbacks on svc_xprt_deletion
Remove connections from the list when they go down.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
edc7a89403 nfsd: provide callbacks on svc_xprt deletion
NFSv4.1 needs warning when a client tcp connection goes down, if that
connection is being used as a backchannel, so that it can warn the
client that it has lost the backchannel connection.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
c7662518c7 nfsd4: keep per-session list of connections
The spec requires us in various places to keep track of the connections
associated with each session.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
5b6feee960 nfsd4: clean up session allocation
Changes:
	- make sure session memory reservation is released on failure
	  path.
	- use min_t()/min() for more compact code in several places.
	- break alloc_init_session into smaller pieces.
	- miscellaneous other cleanup.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
dd93842457 nfsd4: fix alloc_init_session return type
This returns an nfs error, not -ERRNO.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
c23753dac1 nfsd4: fix alloc_init_session BUILD_BUG_ON()
Note we're allocating an array of nfsd4_slot *'s, not nfsd4_slot's.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
6ff8da0887 nfsd4: Move callback setup to callback queue
Instead of creating the new rpc client from a regular server thread,
set a flag, kick off a null call, and allow the null call to do the work
of setting up the client on the callback workqueue.

Use a spinlock to ensure the callback work gets a consistent view of the
callback parameters.

This allows, for example, changing the callback from contexts where
sleeping is not allowed.  I hope it will also keep the locking simple as
we add more session and trunking features, by serializing most of the
callback-specific work.

This also closes a small race where the the new cb_ident could be used
with an old connection (or vice-versa).

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:44 -04:00
J. Bruce Fields
fb00392326 nfsd4: remove separate cb_args struct
I don't see the point of the separate struct.  It seems to just be
getting in the way.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:43 -04:00
J. Bruce Fields
cee277d924 nfsd4: use generic callback code in null case
This will eventually allow us, for example, to kick off null callback
from contexts where we can't sleep.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:43 -04:00
J. Bruce Fields
5878453dbd nfsd4: generic callback code
Make the recall callback code more generic, so that other callbacks
will be able to use it too.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:43 -04:00
J. Bruce Fields
1c8556026e nfsd4: rename nfs4_rpc_args->nfsd4_cb_args
With apologies for the gratuitous rename, the new name seems more
helpful to me.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:43 -04:00
J. Bruce Fields
586f36735e nfsd4: combine nfs4_rpc_args and nfsd4_cb_sequence
These two structs don't really need to be distinct as far as I can tell.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:43 -04:00
J. Bruce Fields
07263f1efe nfsd4: minor variable renaming (cb -> conn)
Now that we have both nfsd4_callback and nfsd4_cb_conn structures, I get
confused if variables of both types are always named cb....

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2010-10-01 19:29:43 -04:00
J. Bruce Fields
1e7af1b806 nfsd4: remove spkm3
Unfortunately, spkm3 never got very far; while interoperability with one
other implementation was demonstrated at some point, problems were found
with the spec that were deemed not worth fixing.

The kernel code is useless on its own without nfs-utils patches which
were never merged into nfs-utils, and were only ever available from
citi.umich.edu.  They appear not to have been updated since 2005.

Therefore it seems safe to assume that this code has no users, and never
will.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 18:09:55 -04:00
NeilBrown
277f68dbba sunrpc: fix race in new cache_wait code.
If we set up to wait for a cache item to be filled in, and then find
that it is no longer pending, it could be that some other thread is
in 'cache_revisit_request' and has moved our request to its 'pending' list.
So when our setup_deferral calls cache_revisit_request it will find nothing to
put on the pending list, and do nothing.

We then return from cache_wait_req, thus leaving the 'sleeper'
on-stack structure open to being corrupted by subsequent stack usage.

However that 'sleeper' could still be on the 'pending' list that the
other thread is looking at and so any corruption could cause it to behave badly.

To avoid this race we simply take the same path as if the
'wait_for_completion_interruptible_timeout' was interrupted and if the
sleeper is no longer on the list (which it won't be) we wait on the
completion - which will ensure that any other cache_revisit_request
will have let go of the sleeper.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 18:09:54 -04:00
Pavel Emelyanov
14ec63c333 sunrpc: Create sockets in net namespaces
The context is already known in all the sock_create callers.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:19:00 -04:00
Pavel Emelyanov
721db93a55 net: Export __sock_create
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:59 -04:00
Pavel Emelyanov
37aa213373 sunrpc: Tag rpc_xprt with net
The net is known from the xprt_create and this tagging will also
give un the context in the conntection workers where real sockets
are created.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:58 -04:00
Pavel Emelyanov
9a23e332ec sunrpc: Add net to xprt_create
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:57 -04:00
Pavel Emelyanov
c653ce3f0a sunrpc: Add net to rpc_create_args
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:56 -04:00
Pavel Emelyanov
62832c039e sunrpc: Pull net argument downto svc_create_socket
After this the socket creation in it knows the context.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:55 -04:00
Pavel Emelyanov
fc5d00b04a sunrpc: Add net argument to svc_create_xprt
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:54 -04:00
Pavel Emelyanov
e204e621b4 sunrpc: Factor out rpc_xprt freeing
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:53 -04:00
Pavel Emelyanov
bd1722d431 sunrpc: Factor out rpc_xprt allocation
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 17:18:52 -04:00
Benny Halevy
2b44f1ba40 nfsd4: adjust buflen for encoded attrs bitmap based on actual bitmap length
The existing code adjusted it based on the worst case scenario for the returned
bitmap and the best case scenario for the supported attrs attribute.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[bfields@redhat.com: removed likely/unlikely's]
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-01 16:52:24 -04:00
Stephen Rothwell
c135e84afb sunrpc: fix up rpcauth_remove_module section mismatch
On Wed, 29 Sep 2010 14:02:38 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> After merging the final tree, today's linux-next build (powerpc
> ppc44x_defconfig) produced tis warning:
>
> WARNING: net/sunrpc/sunrpc.o(.init.text+0x110): Section mismatch in reference from the function init_sunrpc() to the function .exit.text:rpcauth_remove_module()
> The function __init init_sunrpc() references
> a function __exit rpcauth_remove_module().
> This is often seen when error handling in the init function
> uses functionality in the exit path.
> The fix is often to remove the __exit annotation of
> rpcauth_remove_module() so it may be used outside an exit section.
>
> Probably caused by commit 2f72c9b737
> ("sunrpc: The per-net skeleton").

This actually causes a build failure on a sparc32 defconfig build:

`rpcauth_remove_module' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o

I applied the following patch for today:

Fixes:

`rpcauth_remove_module' referenced in section `.init.text' of net/built-in.o: defined in discarded section `.exit.text' of net/built-in.o

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-29 12:27:37 -04:00
Pavel Emelyanov
90d51b02fd sunrpc: Make the ip_map_cache be per-net
Everything that is required for that already exists:
* the per-net cache registration with respective proc entries
* the context (struct net) is available in all the users

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-27 10:16:12 -04:00
Pavel Emelyanov
4f42d0d53c sunrpc: Make the /proc/net/rpc appear in net namespaces
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-27 10:16:12 -04:00
Pavel Emelyanov
2f72c9b737 sunrpc: The per-net skeleton
Register empty per-net operations for the sunrpc layer.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-27 10:16:12 -04:00
Pavel Emelyanov
4fb8518bda sunrpc: Tag svc_xprt with net
The transport representation should be per-net of course.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-09-27 10:16:12 -04:00