kernel/linux.git/include/linux/sunrpc/clnt.h, branch v4.9.136

NFSv4 client live hangs after live data migration recovery

2018-09-09T18:01:23+00:00

commit 0f90be132cbf1537d87a6a8b9e80867adac892f6 upstream. After a live data migration event at the NFS server, the client may send I/O requests to the wrong server, causing a live hang due to repeated recovery events. On the wire, this will appear as an I/O request failing with NFS4ERR_BADSESSION, followed by successful CREATE_SESSION, repeatedly. NFS4ERR_BADSSESSION is returned because the session ID being used was issued by the other server and is not valid at the old server. The failure is caused by async worker threads having cached the transport (xprt) in the rpc_task structure. After the migration recovery completes, the task is redispatched and the task resends the request to the wrong server based on the old value still present in tk_xprt. The solution is to recompute the tk_xprt field of the rpc_task structure so that the request goes to the correct server. Signed-off-by: Bill Baker Reviewed-by: Chuck Lever Tested-by: Helen Chao Fixes: fb43d17210ba ("SUNRPC: Use the multipath iterator to assign a ...") Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Anna Schumaker Signed-off-by: Greg Kroah-Hartman

SUNRPC: cleanup ida information when removing sunrpc module

2017-02-01T07:33:09+00:00

commit c929ea0b910355e1876c64431f3d5802f95b3d75 upstream. After removing sunrpc module, I get many kmemleak information as, unreferenced object 0xffff88003316b1e0 (size 544): comm "gssproxy", pid 2148, jiffies 4294794465 (age 4200.081s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] kmemleak_alloc+0x4a/0xa0 [] kmem_cache_alloc+0x15e/0x1f0 [] ida_pre_get+0xaa/0x150 [] ida_simple_get+0xad/0x180 [] nlmsvc_lookup_host+0x4ab/0x7f0 [lockd] [] lockd+0x4d/0x270 [lockd] [] param_set_timeout+0x55/0x100 [lockd] [] svc_defer+0x114/0x3f0 [sunrpc] [] svc_defer+0x2d7/0x3f0 [sunrpc] [] rpc_show_info+0x8a/0x110 [sunrpc] [] proc_reg_write+0x7f/0xc0 [] __vfs_write+0xdf/0x3c0 [] vfs_write+0xef/0x240 [] SyS_write+0xad/0x130 [] entry_SYSCALL_64_fastpath+0x1a/0xa9 [] 0xffffffffffffffff I found, the ida information (dynamic memory) isn't cleanup. Signed-off-by: Kinglong Mee Fixes: 2f048db4680a ("SUNRPC: Add an identifier for struct rpc_clnt") Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman

SUNRPC: rpc_clnt_add_xprt setup function for NFS layer

2016-09-19T17:08:36+00:00

Use a setup function to call into the NFS layer to test an rpc_xprt for session trunking so as to not leak the rpc_xprt_switch into the nfs layer. Search for the address in the rpc_xprt_switch first so as not to put an unnecessary EXCHANGE_ID on the wire. Signed-off-by: Andy Adamson Signed-off-by: Anna Schumaker

SUNRPC search xprt switch for sockaddr

2016-09-19T17:08:36+00:00

Signed-off-by: Andy Adamson Signed-off-by: Anna Schumaker

SUNRPC rpc_clnt_xprt_switch_add_xprt

2016-09-19T17:08:36+00:00

Give the NFS layer access to the rpc_xprt_switch_add_xprt function Signed-off-by: Andy Adamson Signed-off-by: Anna Schumaker

SUNRPC rpc_clnt_xprt_switch_put

2016-09-19T17:08:36+00:00

Give the NFS layer access to the xprt_switch_put function Signed-off-by: Andy Adamson Signed-off-by: Anna Schumaker

NFSv4: Cap the transport reconnection timer at 1/2 lease period

2016-08-05T23:22:22+00:00

We don't want to miss a lease period renewal due to the TCP connection failing to reconnect in a timely fashion. To ensure this doesn't happen, cap the reconnection timer so that we retry the connection attempt at least every 1/2 lease period. Signed-off-by: Trond Myklebust

nfsd4/rpc: move backchannel create logic into rpc code

2016-06-15T14:32:25+00:00

Also simplify the logic a bit. Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields Acked-by: Trond Myklebust

sunrpc: Advertise maximum backchannel payload size

2016-05-17T19:47:57+00:00

RPC-over-RDMA transports have a limit on how large a backward direction (backchannel) RPC message can be. Ensure that the NFSv4.x CREATE_SESSION operation advertises this limit to servers. Signed-off-by: Chuck Lever Tested-by: Steve Wise Signed-off-by: Anna Schumaker

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