[PATCH v5 0/3] Make nfs stats visible in network NS

[Josef Bacik <josef@toxicpanda.com>]

v1: https://lore.kernel.org/linux-nfs/cover.1706124811.git.josef@toxicpanda.com/
v2: https://lore.kernel.org/linux-nfs/cover.1706212207.git.josef@toxicpanda.com/
v3: https://lore.kernel.org/linux-nfs/cover.1706283674.git.josef@toxicpanda.com/
v4: https://lore.kernel.org/linux-nfs/cover.1706305686.git.josef@toxicpanda.com/

v4->v5:
- If we clone a client pass through their ->cl_stats so it's populated properly.

v3->v4:
- Fix a weird formatting thing that snuck into 1/3.

v2->v3:
- Split out the nfs and nfsd related changes into their own patches.
- Dropped the change adding sv_stats throuch svc_create()
- Changed the th_cnt to be global, re-arranged it's location.

v1->v2:
- rework the sunprc service creation to take a pointer to the sv_stats.
- dropped ->pg_stats from the svc_program.
- converted all of the nfsd global stats to per-network namespace.
- added the ability to point at a specific rpc_stat for rpc program creation.
- converted the rpc stats for nfs to per-network namespace.

-- Original email --
Hello,

We're currently deploying NFS internally and have run into some oddities with
our usage of containers.  All of the services that mount and export NFS volumes
run inside of containers, specifically all the namespaces including network
namespaces.  Our monitoring is done on a per-container basis, so we need access
to the nfs and nfsd stats that are under /proc/net/sunrpc.  However these are
only tied to the init_net, which makes them invisible to containers in a
different network namespace.

Fix this so that these files are tied to the network namespace.  This allows us
to avoid the hack of bind mounting the hosts /proc into the container in order
to do proper monitoring.  Thanks,

Josef

Josef Bacik (3):
  sunrpc: add a struct rpc_stats arg to rpc_create_args
  nfs: expose /proc/net/sunrpc/nfs in net namespaces
  nfs: make the rpc_stat per net namespace

 fs/nfs/client.c             | 5 ++++-
 fs/nfs/inode.c              | 8 ++++----
 fs/nfs/internal.h           | 2 --
 fs/nfs/netns.h              | 2 ++
 include/linux/sunrpc/clnt.h | 1 +
 net/sunrpc/clnt.c           | 5 ++++-
 6 files changed, 15 insertions(+), 8 deletions(-)

-- 
2.43.0