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| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2023-09-11 15:49:46 +0300 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2023-10-16 19:44:09 +0300 |
| commit | bd9d6a3efa9709e653aafbeb859289feccb8e70c (patch) | |
| tree | 438ea74fe0653cf8f67cd763b363c6bc42b02b16 /fs/nfsd/nfssvc.c | |
| parent | 13727f85b49babcc40db805118e665605cd040dc (diff) | |
| download | linux-bd9d6a3efa9709e653aafbeb859289feccb8e70c.tar.xz | |
NFSD: add rpc_status netlink support
Introduce rpc_status netlink support for NFSD in order to dump pending
RPC requests debugging information from userspace.
Closes: https://bugzilla.linux-nfs.org/show_bug.cgi?id=366
Tested-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd/nfssvc.c')
| -rw-r--r-- | fs/nfsd/nfssvc.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 433154b9eee0..c5890cdfe97b 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -997,6 +997,15 @@ int nfsd_dispatch(struct svc_rqst *rqstp) if (!proc->pc_decode(rqstp, &rqstp->rq_arg_stream)) goto out_decode_err; + /* + * Release rq_status_counter setting it to an odd value after the rpc + * request has been properly parsed. rq_status_counter is used to + * notify the consumers if the rqstp fields are stable + * (rq_status_counter is odd) or not meaningful (rq_status_counter + * is even). + */ + smp_store_release(&rqstp->rq_status_counter, rqstp->rq_status_counter | 1); + rp = NULL; switch (nfsd_cache_lookup(rqstp, &rp)) { case RC_DOIT: @@ -1014,6 +1023,12 @@ int nfsd_dispatch(struct svc_rqst *rqstp) if (!proc->pc_encode(rqstp, &rqstp->rq_res_stream)) goto out_encode_err; + /* + * Release rq_status_counter setting it to an even value after the rpc + * request has been properly processed. + */ + smp_store_release(&rqstp->rq_status_counter, rqstp->rq_status_counter + 1); + nfsd_cache_update(rqstp, rp, rqstp->rq_cachetype, statp + 1); out_cached_reply: return 1; |