[PATCH 6.1 171/215] NFSD: add support for sending CB_RECALL_ANY

Greg Kroah-Hartman
2024-03-04T21:50:23Z

From: Dai Ngo <dai.ngo@oracle.com>

[ Upstream commit 3959066b697b5dfbb7141124ae9665337d4bc638 ]

Add XDR encode and decode function for CB_RECALL_ANY.

Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/nfsd/nfs4callback.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++
fs/nfsd/state.h | 1
fs/nfsd/xdr4.h | 5 +++
fs/nfsd/xdr4cb.h | 6 ++++
4 files changed, 84 insertions(+)

--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -76,6 +76,17 @@ static __be32 *xdr_encode_empty_array(__
* 1 Protocol"
*/

+static void encode_uint32(struct xdr_stream *xdr, u32 n)
+{
+ WARN_ON_ONCE(xdr_stream_encode_u32(xdr, n) < 0);
+}
+
+static void encode_bitmap4(struct xdr_stream *xdr, const __u32 *bitmap,
+ size_t len)
+{
+ WARN_ON_ONCE(xdr_stream_encode_uint32_array(xdr, bitmap, len) < 0);
+}
+
/*
* nfs_cb_opnum4
*
@@ -329,6 +340,24 @@ static void encode_cb_recall4args(struct
}

/*
+ * CB_RECALLANY4args
+ *
+ * struct CB_RECALLANY4args {
+ * uint32_t craa_objects_to_keep;
+ * bitmap4 craa_type_mask;
+ * };
+ */
+static void
+encode_cb_recallany4args(struct xdr_stream *xdr,
+ struct nfs4_cb_compound_hdr *hdr, struct nfsd4_cb_recall_any *ra)
+{
+ encode_nfs_cb_opnum4(xdr, OP_CB_RECALL_ANY);
+ encode_uint32(xdr, ra->ra_keep);
+ encode_bitmap4(xdr, ra->ra_bmval, ARRAY_SIZE(ra->ra_bmval));
+ hdr->nops++;
+}
+
+/*
* CB_SEQUENCE4args
*
* struct CB_SEQUENCE4args {
@@ -482,6 +511,26 @@ static void nfs4_xdr_enc_cb_recall(struc
encode_cb_nops(&hdr);
}

+/*
+ * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects
+ */
+static void
+nfs4_xdr_enc_cb_recall_any(struct rpc_rqst *req,
+ struct xdr_stream *xdr, const void *data)
+{
+ const struct nfsd4_callback *cb = data;
+ struct nfsd4_cb_recall_any *ra;
+ struct nfs4_cb_compound_hdr hdr = {
+ .ident = cb->cb_clp->cl_cb_ident,
+ .minorversion = cb->cb_clp->cl_minorversion,
+ };
+
+ ra = container_of(cb, struct nfsd4_cb_recall_any, ra_cb);
+ encode_cb_compound4args(xdr, &hdr);
+ encode_cb_sequence4args(xdr, cb, &hdr);
+ encode_cb_recallany4args(xdr, &hdr, ra);
+ encode_cb_nops(&hdr);
+}

/*
* NFSv4.0 and NFSv4.1 XDR decode functions
@@ -520,6 +569,28 @@ static int nfs4_xdr_dec_cb_recall(struct
return decode_cb_op_status(xdr, OP_CB_RECALL, &cb->cb_status);
}

+/*
+ * 20.6. Operation 8: CB_RECALL_ANY - Keep Any N Recallable Objects
+ */
+static int
+nfs4_xdr_dec_cb_recall_any(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ void *data)
+{
+ struct nfsd4_callback *cb = data;
+ struct nfs4_cb_compound_hdr hdr;
+ int status;
+
+ status = decode_cb_compound4res(xdr, &hdr);
+ if (unlikely(status))
+ return status;
+ status = decode_cb_sequence4res(xdr, cb);
+ if (unlikely(status || cb->cb_seq_status))
+ return status;
+ status = decode_cb_op_status(xdr, OP_CB_RECALL_ANY, &cb->cb_status);
+ return status;
+}
+
#ifdef CONFIG_NFSD_PNFS
/*
* CB_LAYOUTRECALL4args
@@ -783,6 +854,7 @@ static const struct rpc_procinfo nfs4_cb
#endif
PROC(CB_NOTIFY_LOCK, COMPOUND, cb_notify_lock, cb_notify_lock),
PROC(CB_OFFLOAD, COMPOUND, cb_offload, cb_offload),
+ PROC(CB_RECALL_ANY, COMPOUND, cb_recall_any, cb_recall_any),
};

static unsigned int nfs4_cb_counts[ARRAY_SIZE(nfs4_cb_procedures)];
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -636,6 +636,7 @@ enum nfsd4_cb_op {
NFSPROC4_CLNT_CB_OFFLOAD,
NFSPROC4_CLNT_CB_SEQUENCE,
NFSPROC4_CLNT_CB_NOTIFY_LOCK,
+ NFSPROC4_CLNT_CB_RECALL_ANY,
};

/* Returns true iff a is later than b: */
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -896,5 +896,10 @@ struct nfsd4_operation {
union nfsd4_op_u *);
};

+struct nfsd4_cb_recall_any {
+ struct nfsd4_callback ra_cb;
+ u32 ra_keep;
+ u32 ra_bmval[1];
+};

#endif
--- a/fs/nfsd/xdr4cb.h
+++ b/fs/nfsd/xdr4cb.h
@@ -48,3 +48,9 @@
#define NFS4_dec_cb_offload_sz (cb_compound_dec_hdr_sz + \
cb_sequence_dec_sz + \
op_dec_sz)
+#define NFS4_enc_cb_recall_any_sz (cb_compound_enc_hdr_sz + \
+ cb_sequence_enc_sz + \
+ 1 + 1 + 1)
+#define NFS4_dec_cb_recall_any_sz (cb_compound_dec_hdr_sz + \
+ cb_sequence_dec_sz + \
+ op_dec_sz)