[LTP] [PATCH 1/1] nfsstat01: Update client RPC calls for kernel 6.9

[Calum Mackay]

To clarify…

On 02/07/2024 5:54 pm, Calum Mackay wrote:
> hi Petr,
> 
> I noticed your LTP patch [1][2] which adjusts the nfsstat01 test on v6.9 
> kernels, to account for Josef's changes [3], which restrict the NFS/RPC 
> stats per-namespace.
> 
> I see that Josef's changes were backported, as far back as longterm 
> v5.4,

Sorry, that's not quite accurate.

Josef's NFS client changes were all backported from v6.9, as far as 
longterm v5.4.y:

2057a48d0dd0 sunrpc: add a struct rpc_stats arg to rpc_create_args
d47151b79e32 nfs: expose /proc/net/sunrpc/nfs in net namespaces
1548036ef120 nfs: make the rpc_stat per net namespace


Of Josef's NFS server changes, four were backported from v6.9 to v6.8:

418b9687dece sunrpc: use the struct net as the svc proc private
d98416cc2154 nfsd: rename NFSD_NET_* to NFSD_STATS_*
93483ac5fec6 nfsd: expose /proc/net/sunrpc/nfsd in net namespaces
4b14885411f7 nfsd: make all of the nfsd stats per-network namespace

and the others remained only in v6.9:

ab42f4d9a26f sunrpc: don't change ->sv_stats if it doesn't exist
a2214ed588fb nfsd: stop setting ->pg_stats for unused stats
f09432386766 sunrpc: pass in the sv_stats struct through svc_create_pooled
3f6ef182f144 sunrpc: remove ->pg_stats from svc_program
e41ee44cc6a4 nfsd: remove nfsd_stats, make th_cnt a global counter
16fb9808ab2c nfsd: make svc_stat per-network namespace instead of global



I'm wondering if this difference between NFS client, and NFS server, 
stat behaviour, across kernel versions, may perhaps cause some user 
confusion?


cheers,
calum.




> so your check for kernel version "6.9" in the test may need to be 
> adjusted, if LTP is intended to be run on stable kernels?
> 
> best wishes,
> calum.
> 
> 
> [1] https://lore.kernel.org/ltp/20240620111129.594449-1-pvorel@suse.cz/
> [2] https://patchwork.ozlabs.org/project/ltp/ 
> patch/20240620111129.594449-1-pvorel@suse.cz/
> [3] https://lore.kernel.org/linux-nfs/ 
> cover.1708026931.git.josef@toxicpanda.com/