Add a helper function to increment stateid seqids according to the
rules specified in RFC5661 Section 8.2.2.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfs/nfs4_fs.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 3564da1ba8a1..e8f74ed98e42 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -574,6 +574,15 @@ static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stat
return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0;
}
+static inline void nfs4_stateid_seqid_inc(nfs4_stateid *s1)
+{
+ u32 seqid = be32_to_cpu(s1->seqid);
+
+ if (++seqid == 0)
+ ++seqid;
+ s1->seqid = cpu_to_be32(seqid);
+}
+
static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state)
{
return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0;
--
2.21.0
