linux-toradex.git/include/linux/sunrpc/clnt.h, branch v4.6-rc3

SUNRPC: Allow addition of new transports to a struct rpc_clnt

2016-02-05T23:48:57+00:00

Add a function to allow creation and addition of a new transport
to an existing rpc_clnt

Signed-off-by: Trond Myklebust

SUNRPC: Add a helper to apply a function to all the rpc_clnt's transports

2016-02-05T23:48:55+00:00

Add a helper for tasks that require us to apply a function to all the
transports in an rpc_clnt.
An example of a usecase would be BIND_CONN_TO_SESSION, where we want
to send one RPC call down each transport.

Signed-off-by: Trond Myklebust

SUNRPC: Make rpc_clnt store the multipath iterators

2016-02-05T23:48:54+00:00

This is a pre-patch for the RPC multipath code. It sets up the storage in
struct rpc_clnt for the multipath code.

Signed-off-by: Trond Myklebust

SUNRPC: Remove unused function rpc_task_reset_client

2016-02-01T02:37:22+00:00

Signed-off-by: Trond Myklebust

sunrpc: keep a count of swapfiles associated with the rpc_clnt

2015-06-10T22:26:14+00:00

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

2015-02-03T21:40:17+00:00

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

2014-11-27T18:14:51+00:00

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

2014-03-30T14:47:36+00:00

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

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

2013-10-28T19:21:32+00:00

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

2013-10-01T22:22:11+00:00

Signed-off-by: Trond Myklebust