From: Olga Kornievskaia <kolga@xxxxxxxxxx>
Client needs to handle session trunking group membership changes that
occur when a particular server leaves an established trunked group.
This results in a server sending a NFS4ERR_BAD_SESSION because that
server no longer has session's state.
This series proposes to deal with that situation in two fold. First
on DESTROY_SESSION, the client will offline all trunked connections
it has established to the server. Then on CREATE_SESSION it will
iterate thru offlined connections only and probe them again for
session trunking. If session trunking conditions still hold then
such transport would be made active again otherwise it will be
deleted from the trunked group.
Olga Kornievskaia (12):
SUNRPC expose functions for offline remote xprt functionality
SUNRPC add function to offline remove trunkable transports
NFSv4.1 offline trunkable transports on DESTROY_SESSION
SUNRPC create an iterator to list only OFFLINE xprts
SUNRPC parameterize rpc_clnt_iterate_for_each_xprt with iterator init
function
SUNRPC enable back offline transports in trunking discovery
SUNRPC create an rpc function that allows xprt removal from rpc_clnt
NFSv4.1 remove xprt from xprt_switch if session trunking test fails
SUNRPC restructure rpc_clnt_setup_test_and_add_xprt
SUNRPC export xprt_iter_rewind function
SUNRPC create a function that probes only offline transports
NFSv4.1 probe offline transports for trunking on session creation
fs/nfs/nfs4proc.c | 18 ++-
include/linux/sunrpc/clnt.h | 7 +-
include/linux/sunrpc/xprt.h | 3 +
include/linux/sunrpc/xprtmultipath.h | 7 +-
net/sunrpc/clnt.c | 204 ++++++++++++++++++++++-----
net/sunrpc/debugfs.c | 3 +-
net/sunrpc/stats.c | 2 +-
net/sunrpc/sysfs.c | 28 +---
net/sunrpc/xprt.c | 35 +++++
net/sunrpc/xprtmultipath.c | 109 +++++++++++---
10 files changed, 338 insertions(+), 78 deletions(-)
--
2.27.0
