On Thu, 2016-05-05 at 06:53 -0400, Jeff Layton wrote:
> Move the existing static function to an inline helper, and call it.
>
> Cc: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Jeff Layton <jeff.layton@xxxxxxxxxxxxxxx>
This is just something I noticed by inspection while ensuring that some
client-side changes that I have queued won't cause a problem. I don't
have a knfsd pnfs test rig though, so I can't test this easily.
As a side note though...should we also be verifying that the seqid is not zero in this function? That's never allowed for layout stateids.
> ---
> fs/nfsd/nfs4layouts.c | 2 +-
> fs/nfsd/nfs4state.c | 8 +-------
> fs/nfsd/state.h | 5 +++++
> 3 files changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
> index 825c7bc8d789..953c0755cb37 100644
> --- a/fs/nfsd/nfs4layouts.c
> +++ b/fs/nfsd/nfs4layouts.c
> @@ -289,7 +289,7 @@ nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
>
> status = nfserr_bad_stateid;
> mutex_lock(&ls->ls_mutex);
> - if (stateid->si_generation > stid->sc_stateid.si_generation)
> + if (nfsd4_stateid_generation_after(stateid, &stid->sc_stateid))
> goto out_unlock_stid;
> if (layout_type != ls->ls_layout_type)
> goto out_unlock_stid;
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 0462eeddfff9..f5f82e145018 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -4651,12 +4651,6 @@ grace_disallows_io(struct net *net, struct inode *inode)
> return opens_in_grace(net) && mandatory_lock(inode);
> }
>
> -/* Returns true iff a is later than b: */
> -static bool stateid_generation_after(stateid_t *a, stateid_t *b)
> -{
> - return (s32)(a->si_generation - b->si_generation) > 0;
> -}
> -
> static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
> {
> /*
> @@ -4670,7 +4664,7 @@ static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_s
> return nfs_ok;
>
> /* If the client sends us a stateid from the future, it's buggy: */
> - if (stateid_generation_after(in, ref))
> + if (nfsd4_stateid_generation_after(in, ref))
> return nfserr_bad_stateid;
> /*
> * However, we could see a stateid from the past, even from a
> diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
> index c050c53036a6..986e51e5ceac 100644
> --- a/fs/nfsd/state.h
> +++ b/fs/nfsd/state.h
> @@ -573,6 +573,11 @@ enum nfsd4_cb_op {
> NFSPROC4_CLNT_CB_SEQUENCE,
> };
>
> +/* Returns true iff a is later than b: */
> +static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
> +{
> + return (s32)(a->si_generation - b->si_generation) > 0;
> +}
>
> struct nfsd4_compound_state;
> struct nfsd_net;
--
Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
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