[v2,0/5] NFS & SUNRPC: Sysfs Improvements

Message

Anna Schumaker Jan. 27, 2025, 9:50 p.m. UTC

From: Anna Schumaker <[e-mail]>

These are a handful of improvements that have been in the back of my
mind for a while. The first patch adds a (read-only) file to the NFS
client's sysfs collection to check the server's implementation id. The
remaining patches are on the sunrpc side.

I did look into the 'nconnect' and 'max_connect' NFS client mount
options and how they interact with adding a new xprt in patch 4. My
reading is that 'nconnect' is just the initial number of connections
made by the NFS client during mounting. That shouldn't disallow adding a
new connection. The 'max_connect' parameter refers to the maximum number
of unique IP addresses in an xprt switch. The new connection I generate
is a clone of the main xprt, not a new address, so this doesn't come
into play either. So I'm convinced adding a new xprt is okay to do here.

Thoughts?
Anna

Changes for v2:
- Added a file for rpc_clnt information
- Added a file for on-step xprt deletion

Anna Schumaker (5):
  NFS: Add implid to sysfs
  sunrpc: Add a sysfs attr for xprtsec
  sunrpc: Add a sysfs files for rpc_clnt information
  sunrpc: Add a sysfs file for adding a new xprt
  sunrpc: Add a sysfs file for one-step xprt deletion

 fs/nfs/sysfs.c                       |  60 ++++++++
 include/linux/sunrpc/xprtmultipath.h |   1 +
 net/sunrpc/sysfs.c                   | 202 +++++++++++++++++++++++++++
 net/sunrpc/xprtmultipath.c           |  21 +++
 4 files changed, 284 insertions(+)