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From:   Olga Kornievskaia <olga.kornievskaia@gmail.com>
To:     trond.myklebust@hammerspace.com, anna.schumaker@netapp.com
Cc:     linux-nfs@vger.kernel.org
Subject: [PATCH v3 0/6] do not collapse trunkable transports
Date:   Tue, 15 Jun 2021 21:10:07 -0400
Message-Id: <20210616011013.50547-1-olga.kornievskaia@gmail.com>
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From: Olga Kornievskaia <kolga@netapp.com>

This patch series attempts to allow for new mounts that are to the
same server (ie nfsv4.1+ session trunkable servers) but different
network addresses to use connections associated with those mounts
but still use the same client structure.

A new mount options, "max_connect", controls how many extra transports
can be added to an existing client, with maximum of 16 such transports.

v3:
-- add a new counter to xprt_switch to keep track of transports with
unique addresses
-- control of enforcing the limit is moved into the sunrpc layer
into the function rpc_clnt_test_and_add_xprt
-- after a trunking transport is created if mount request asked for
nconnect connections, create as many as the original/first mount had

Olga Kornievskaia (6):
  SUNRPC keep track of number of transports to unique addresses
  SUNRPC add xps_nunique_destaddr_xprts to xprt_switch_info in sysfs
  NFSv4 introduce max_connect mount options
  SUNRPC enforce creation of no more than max_connect xprts
  NFSv4 add network transport when session trunking is detected
  NFSv4 allow for nconnect value of trunkable transport

 fs/nfs/client.c                      |  2 ++
 fs/nfs/fs_context.c                  |  7 ++++
 fs/nfs/internal.h                    |  2 ++
 fs/nfs/nfs4client.c                  | 50 ++++++++++++++++++++++++++--
 fs/nfs/super.c                       |  2 ++
 include/linux/nfs_fs.h               |  5 +++
 include/linux/nfs_fs_sb.h            |  1 +
 include/linux/sunrpc/clnt.h          |  2 ++
 include/linux/sunrpc/xprtmultipath.h |  1 +
 net/sunrpc/clnt.c                    | 11 +++++-
 net/sunrpc/sysfs.c                   |  4 ++-
 net/sunrpc/xprtmultipath.c           |  1 +
 12 files changed, 84 insertions(+), 4 deletions(-)

-- 
2.27.0