nfsd4: implement backchannel_ctl operation
This operation is mandatory for servers to implement.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 6c9a4b2..f955176 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1666,6 +1666,12 @@
.op_name = "OP_EXCHANGE_ID",
.op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
},
+ [OP_BACKCHANNEL_CTL] = {
+ .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
+ .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
+ .op_name = "OP_BACKCHANNEL_CTL",
+ .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
+ },
[OP_BIND_CONN_TO_SESSION] = {
.op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
.op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index dbbbd2f..4023e776 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1865,6 +1865,20 @@
return nfserr_inval;
}
+__be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc)
+{
+ struct nfsd4_session *session = cstate->session;
+
+ spin_lock(&client_lock);
+ session->se_cb_prog = bc->bc_cb_program;
+ session->se_cb_sec = bc->bc_cb_sec;
+ spin_unlock(&client_lock);
+
+ nfsd4_probe_callback(session->se_client);
+
+ return nfs_ok;
+}
+
__be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate,
struct nfsd4_bind_conn_to_session *bcts)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 511f980..d7e7c11 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -483,6 +483,17 @@
DECODE_TAIL;
}
+static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
+{
+ DECODE_HEAD;
+
+ READ_BUF(4);
+ READ32(bc->bc_cb_program);
+ nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
+
+ DECODE_TAIL;
+}
+
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
{
DECODE_HEAD;
@@ -1536,7 +1547,7 @@
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
/* new operations for NFSv4.1 */
- [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
+ [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index bff856c..758bc9c 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -166,6 +166,11 @@
struct nfsd4_cb_sec cb_sec;
};
+struct nfsd4_backchannel_ctl {
+ u32 bc_cb_program;
+ struct nfsd4_cb_sec bc_cb_sec;
+};
+
struct nfsd4_bind_conn_to_session {
struct nfs4_sessionid sessionid;
u32 dir;
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index acd127d..71c5c47 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -462,6 +462,7 @@
/* NFSv4.1 */
struct nfsd4_exchange_id exchange_id;
+ struct nfsd4_backchannel_ctl backchannel_ctl;
struct nfsd4_bind_conn_to_session bind_conn_to_session;
struct nfsd4_create_session create_session;
struct nfsd4_destroy_session destroy_session;
@@ -566,6 +567,7 @@
struct nfsd4_sequence *seq);
extern __be32 nfsd4_exchange_id(struct svc_rqst *rqstp,
struct nfsd4_compound_state *, struct nfsd4_exchange_id *);
+extern __be32 nfsd4_backchannel_ctl(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_backchannel_ctl *);
extern __be32 nfsd4_bind_conn_to_session(struct svc_rqst *, struct nfsd4_compound_state *, struct nfsd4_bind_conn_to_session *);
extern __be32 nfsd4_create_session(struct svc_rqst *,
struct nfsd4_compound_state *,