[RFC 06/11] nfsd41: Backchannel: Add sequence arguments to callback RPC arguments

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Follow the model we use in the client. Make the sequence arguments
part of the regular RPC arguments.  The results point to them.  Adjust
references to the sequence arguments.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@xxxxxxxxxx>
[define struct nfsd4_cb_sequence here]
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
 fs/nfsd/nfs4callback.c     |    9 +++++++++
 include/linux/nfsd/state.h |    9 +++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index f75750e..0b5c4a6 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -92,6 +92,15 @@ enum nfs_cb_opnum4 {
 					cb_sequence_dec_sz +            \
 					op_dec_sz)
 
+struct nfs4_rpc_args {
+	void				*args_op;
+	struct nfsd4_cb_sequence	args_seq;
+};
+
+struct nfs4_rpc_res {
+	struct nfsd4_cb_sequence	*res_seq;
+};
+
 /*
 * Generic encode routines from fs/nfs/nfs4xdr.c
 */
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index 212a75b..931aaa6 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -61,6 +61,12 @@ typedef struct {
 #define si_stateownerid   si_opaque.so_stateownerid
 #define si_fileid         si_opaque.so_fileid
 
+struct nfsd4_cb_sequence {
+	/* args/res */
+	u32			cbs_minorversion;
+	struct nfs4_client	*cbs_clp;
+};
+
 struct nfs4_delegation {
 	struct list_head	dl_perfile;
 	struct list_head	dl_perclnt;
@@ -188,6 +194,9 @@ struct nfs4_client {
 	struct nfsd4_slot	cl_slot;	/* create_session slot */
 	u32			cl_exchange_flags;
 	struct nfs4_sessionid	cl_sessionid;
+
+	/* for nfs41 callbacks */
+	struct svc_xprt		*cl_cb_xprt;	/* 4.1 callback transport */
 };
 
 /* struct nfs4_client_reset
-- 
1.5.4.3

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