Add the encoding/decoding for CB_NOTIFY_LOCK operations.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/nfsd/nfs4callback.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++
fs/nfsd/state.h | 7 +++++++
fs/nfsd/xdr4cb.h | 9 ++++++++
3 files changed, 73 insertions(+)
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index dbef646c6a2d..211dc2aed8e1 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -623,6 +623,62 @@ static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp,
}
#endif /* CONFIG_NFSD_PNFS */
+static void encode_stateowner(struct xdr_stream *xdr, struct nfs4_stateowner *so)
+{
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 8 + 4 + so->so_owner.len);
+ p = xdr_encode_opaque_fixed(p, &so->so_client->cl_clientid, 8);
+ xdr_encode_opaque(p, so->so_owner.data, so->so_owner.len);
+}
+
+static void nfs4_xdr_enc_cb_notify_lock(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ const struct nfsd4_callback *cb)
+{
+ const struct nfsd4_blocked_lock *nbl =
+ container_of(cb, struct nfsd4_blocked_lock, nbl_cb);
+ struct nfs4_lockowner *lo = (struct nfs4_lockowner *)nbl->nbl_lock.fl_owner;
+ struct nfs4_cb_compound_hdr hdr = {
+ .ident = 0,
+ .minorversion = cb->cb_clp->cl_minorversion,
+ };
+
+ __be32 *p;
+
+ BUG_ON(hdr.minorversion == 0);
+
+ encode_cb_compound4args(xdr, &hdr);
+ encode_cb_sequence4args(xdr, cb, &hdr);
+
+ p = xdr_reserve_space(xdr, 4);
+ *p = cpu_to_be32(OP_CB_NOTIFY_LOCK);
+ encode_nfs_fh4(xdr, &nbl->nbl_fh);
+ encode_stateowner(xdr, &lo->lo_owner);
+ hdr.nops++;
+
+ encode_cb_nops(&hdr);
+}
+
+static int nfs4_xdr_dec_cb_notify_lock(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfsd4_callback *cb)
+{
+ struct nfs4_cb_compound_hdr hdr;
+ int status;
+
+ status = decode_cb_compound4res(xdr, &hdr);
+ if (unlikely(status))
+ return status;
+
+ if (cb) {
+ status = decode_cb_sequence4res(xdr, cb);
+ if (unlikely(status || cb->cb_seq_status))
+ return status;
+ }
+ return decode_cb_op_status(xdr, OP_CB_NOTIFY_LOCK, &cb->cb_status);
+}
+
/*
* RPC procedure tables
*/
@@ -643,6 +699,7 @@ static struct rpc_procinfo nfs4_cb_procedures[] = {
#ifdef CONFIG_NFSD_PNFS
PROC(CB_LAYOUT, COMPOUND, cb_layout, cb_layout),
#endif
+ PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock),
};
static struct rpc_version nfs_cb_version4 = {
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 0bdc79cb359c..88d029dd13aa 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -571,6 +571,7 @@ enum nfsd4_cb_op {
NFSPROC4_CLNT_CB_RECALL,
NFSPROC4_CLNT_CB_LAYOUT,
NFSPROC4_CLNT_CB_SEQUENCE,
+ NFSPROC4_CLNT_CB_NOTIFY_LOCK,
};
/* Returns true iff a is later than b: */
@@ -579,6 +580,12 @@ static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
return (s32)(a->si_generation - b->si_generation) > 0;
}
+struct nfsd4_blocked_lock {
+ struct file_lock nbl_lock;
+ struct knfsd_fh nbl_fh;
+ struct nfsd4_callback nbl_cb;
+};
+
struct nfsd4_compound_state;
struct nfsd_net;
diff --git a/fs/nfsd/xdr4cb.h b/fs/nfsd/xdr4cb.h
index c47f6fdb111a..49b719dfef95 100644
--- a/fs/nfsd/xdr4cb.h
+++ b/fs/nfsd/xdr4cb.h
@@ -28,3 +28,12 @@
#define NFS4_dec_cb_layout_sz (cb_compound_dec_hdr_sz + \
cb_sequence_dec_sz + \
op_dec_sz)
+
+#define NFS4_enc_cb_notify_lock_sz (cb_compound_enc_hdr_sz + \
+ cb_sequence_enc_sz + \
+ 2 + 1 + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ enc_nfs4_fh_sz)
+#define NFS4_dec_cb_notify_lock_sz (cb_compound_dec_hdr_sz + \
+ cb_sequence_dec_sz + \
+ op_dec_sz)
--
2.7.4
--
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