user/sven/linux.git/include/linux/sunrpc/clnt.h, branch v4.2.4

sunrpc: keep a count of swapfiles associated with the rpc_clnt

2015-06-10T22:26:14Z

Jerome reported seeing a warning pop when working with a swapfile on NFS. The nfs_swap_activate can end up calling sk_set_memalloc while holding the rcu_read_lock and that function can sleep. To fix that, we need to take a reference to the xprt while holding the rcu_read_lock, set the socket up for swapping and then drop that reference. But, xprt_put is not exported and having NFS deal with the underlying xprt is a bit of layering violation anyway. Fix this by adding a set of activate/deactivate functions that take a rpc_clnt pointer instead of an rpc_xprt, and have nfs_swap_activate and nfs_swap_deactivate call those. Also, add a per-rpc_clnt atomic counter to keep track of the number of active swapfiles associated with it. When the counter does a 0->1 transition, we enable swapping on the xprt, when we do a 1->0 transition we disable swapping on it. This also allows us to be a bit more selective with the RPC_TASK_SWAPPER flag. If non-swapper and swapper clnts are sharing a xprt, then we only need to flag the tasks from the swapper clnt with that flag. Acked-by: Mel Gorman Reported-by: Jerome Marchand Signed-off-by: Jeff Layton Reviewed-by: Chuck Lever Signed-off-by: Trond Myklebust

SUNRPC: NULL utsname dereference on NFS umount during namespace cleanup

2015-02-03T21:40:17Z

Fix an Oopsable condition when nsm_mon_unmon is called as part of the namespace cleanup, which now apparently happens after the utsname has been freed. Link: http://lkml.kernel.org/r/20150125220604.090121ae@neptune.home Reported-by: Bruno Prémont Cc: stable@vger.kernel.org # 3.18 Signed-off-by: Trond Myklebust

sunrpc: add debugfs file for displaying client rpc_task queue

2014-11-27T18:14:51Z

It's possible to get a dump of the RPC task queue by writing a value to /proc/sys/sunrpc/rpc_debug. If you write any value to that file, you get a dump of the RPC client task list into the log buffer. This is a rather inconvenient interface however, and makes it hard to get immediate info about the task queue. Add a new directory hierarchy under debugfs: sunrpc/ rpc_clnt/ / Within each clientid directory we create a new "tasks" file that will dump info similar to what shows up in the log buffer, but with a few small differences -- we avoid printing raw kernel addresses in favor of symbolic names and the XID is also displayed. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust

SUNRPC: New helper for creating client with rpc_xprt

2014-03-30T14:47:36Z

Signed-off-by: Kinglong Mee Signed-off-by: J. Bruce Fields

SUNRPC: Add a helper to switch the transport of an rpc_clnt

2013-10-28T19:21:32Z

Add an RPC client API to redirect an rpc_clnt's transport from a source server to a destination server during a migration event. Signed-off-by: Trond Myklebust [ cel: forward ported to 3.12 ] Signed-off-by: Chuck Lever Signed-off-by: Trond Myklebust

SUNRPC: Add RPC task and client level options to disable the resend timeout

2013-10-01T22:22:11Z

Signed-off-by: Trond Myklebust

SUNRPC: Add an identifier for struct rpc_clnt

2013-09-05T14:13:15Z

Add an identifier in order to aid debugging. Signed-off-by: Trond Myklebust

SUNRPC: Remove the rpc_client->cl_dentry

2013-09-01T15:12:42Z

It is now redundant. Signed-off-by: Trond Myklebust

SUNRPC: Add a framework to clean up management of rpc_pipefs directories

2013-08-30T13:19:38Z

The current system requires everyone to set up notifiers, manage directory locking, etc. What we really want to do is have the rpc_client create its directory, and then create all the entries. This patch will allow the RPCSEC_GSS and NFS code to register all the objects that they want to have appear in the directory, and then have the sunrpc code call them back to actually create/destroy their pipefs dentries when the rpc_client creates/destroys the parent. Signed-off-by: Trond Myklebust

SUNRPC: Replace clnt->cl_principal

2013-08-30T13:19:36Z

The clnt->cl_principal is being used exclusively to store the service target name for RPCSEC_GSS/krb5 callbacks. Replace it with something that is stored only in the RPCSEC_GSS-specific code. Signed-off-by: Trond Myklebust