- 21 Oct, 2010 4 commits
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J. Bruce Fields authored
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
The source address field in the transport's sock_xprt is initialized ONLY IF the RPC application passed a pointer to a source address during the call to rpc_create(). However, xs_bind() subsequently uses the value of this field without regard to whether the source address was initialized during transport creation or not. So far we've been lucky: the uninitialized value of this field is zeroes. xs_bind(), until recently, used only the sin[6]_addr field in this sockaddr, and all zeroes is a valid value for this: it means ANYADDR. This is a happy coincidence. However, xs_bind() now wants to use the sa_family field as well, and expects it to be initialized to something other than zero. Therefore, the source address sockaddr field should be fully initialized at transport create time in _every_ case, not just when the RPC application wants to use a specific bind address. Bruce added a workaround for this missing initialization by adjusting commit 6bc9638a, but the "right" way to do this is to ensure that the source address sockaddr is always correctly initialized from the get-go. This patch doesn't introduce a behavior change. It's simply a clean-up of Bruce's fix, to prevent future problems of this kind. It may look like overkill, but a) it clearly documents the default initial value of this field, b) it doesn't assume that the sockaddr_storage memory is first initialized to any particular value, and c) it will fail verbosely if some unknown address family is passed in Originally introduced by commit d3bc9a1d. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Chuck Lever authored
Clean up. Defensive coding: If "family" is ever something that is neither AF_INET nor AF_INET6, xs_reclassify_socket6() is not the appropriate default action. Choose to do nothing in that case. Introduced by commit 6bc9638a. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Tejun Heo authored
* Create and use svc_rdma_wq instead of using the system workqueue and flush_scheduled_work(). This workqueue is necessary to serve as flushing domain for rdma->sc_work which is used to destroy itself and thus can't be flushed explicitly. * Replace cancel_delayed_work() + flush_scheduled_work() with cancel_delayed_work_sync(). * Implement synchronous connect in xprt_rdma_connect() using flush_delayed_work() on the rdma_connect work instead of using flush_scheduled_work(). This is to prepare for the deprecation and removal of flush_scheduled_work(). Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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- 19 Oct, 2010 17 commits
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Pavel Emelyanov authored
Saves some lines of code and some branticks when reading one. 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>
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Pavel Emelyanov authored
Since the xprt in question is forcibly set to be bound the else branch of this check is unneeded. 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>
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Pavel Emelyanov authored
> The reason for this is in the future, we may want to support additional > address family types. We should, therefore, ensure that every piece of > code that is sensitive to address families fail in some orderly manner > to let developers know where a change is needed. Makes sense. I was under impression, that AF-s other than INET are not cared about at all :( Here's a fixed version of the patch. Log: Its callers check for ERR_PTR. 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>
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Pavel Emelyanov authored
The task in question is dereferenced above (and is actually never NULL). 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>
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Pavel Emelyanov authored
Same for UDP sockets creation paths. 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>
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Pavel Emelyanov authored
The v4 and the v6 wrappers only pass the respective family to the xs_tcp_setup_socket. This family can be taken from the xprt's sockaddr. 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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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Pavel Emelyanov authored
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>
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- 18 Oct, 2010 2 commits
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Tom Tucker authored
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>
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Tom Tucker authored
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>
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- 12 Oct, 2010 2 commits
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J. Bruce Fields authored
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>
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Pavel Emelyanov authored
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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- 11 Oct, 2010 2 commits
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NeilBrown authored
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>
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NeilBrown authored
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>
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- 02 Oct, 2010 1 commit
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J. Bruce Fields authored
Commit 78155ed7 "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>
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- 01 Oct, 2010 12 commits
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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J. Bruce Fields authored
Remove connections from the list when they go down. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
This returns an nfs error, not -ERRNO. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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J. Bruce Fields authored
Note we're allocating an array of nfsd4_slot *'s, not nfsd4_slot's. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
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>
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J. Bruce Fields authored
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>
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