NFSD: Implement CB_SEQUENCE referring call lists

The slot index number of the current COMPOUND has, until now, not
been needed outside of nfsd4_sequence(). But to record the tuple
that represents a referring call, the slot number will be needed
when processing subsequent operations in the COMPOUND.

Refactor the code that allocates a new struct nfsd4_slot to ensure
that the new sl_index field is always correctly initialized.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 7d5758faef6a..1995bca158b8 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -278,6 +278,7 @@ struct nfsd4_slot {
 	u32	sl_seqid;
 	__be32	sl_status;
 	struct svc_cred sl_cred;
+	u32	sl_index;
 	u32	sl_datalen;
 	u16	sl_opcnt;
 	u16	sl_generation;