summaryrefslogtreecommitdiff
path: root/fs/nfsd/nfs4callback.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfsd/nfs4callback.c')
-rw-r--r--fs/nfsd/nfs4callback.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 7cbdf1b2e4ab..58277859a467 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -546,6 +546,102 @@ out:
return status;
}
+#ifdef CONFIG_NFSD_PNFS
+/*
+ * CB_LAYOUTRECALL4args
+ *
+ * struct layoutrecall_file4 {
+ * nfs_fh4 lor_fh;
+ * offset4 lor_offset;
+ * length4 lor_length;
+ * stateid4 lor_stateid;
+ * };
+ *
+ * union layoutrecall4 switch(layoutrecall_type4 lor_recalltype) {
+ * case LAYOUTRECALL4_FILE:
+ * layoutrecall_file4 lor_layout;
+ * case LAYOUTRECALL4_FSID:
+ * fsid4 lor_fsid;
+ * case LAYOUTRECALL4_ALL:
+ * void;
+ * };
+ *
+ * struct CB_LAYOUTRECALL4args {
+ * layouttype4 clora_type;
+ * layoutiomode4 clora_iomode;
+ * bool clora_changed;
+ * layoutrecall4 clora_recall;
+ * };
+ */
+static void encode_cb_layout4args(struct xdr_stream *xdr,
+ const struct nfs4_layout_stateid *ls,
+ struct nfs4_cb_compound_hdr *hdr)
+{
+ __be32 *p;
+
+ BUG_ON(hdr->minorversion == 0);
+
+ p = xdr_reserve_space(xdr, 5 * 4);
+ *p++ = cpu_to_be32(OP_CB_LAYOUTRECALL);
+ *p++ = cpu_to_be32(ls->ls_layout_type);
+ *p++ = cpu_to_be32(IOMODE_ANY);
+ *p++ = cpu_to_be32(1);
+ *p = cpu_to_be32(RETURN_FILE);
+
+ encode_nfs_fh4(xdr, &ls->ls_stid.sc_file->fi_fhandle);
+
+ p = xdr_reserve_space(xdr, 2 * 8);
+ p = xdr_encode_hyper(p, 0);
+ xdr_encode_hyper(p, NFS4_MAX_UINT64);
+
+ encode_stateid4(xdr, &ls->ls_recall_sid);
+
+ hdr->nops++;
+}
+
+static void nfs4_xdr_enc_cb_layout(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ const struct nfsd4_callback *cb)
+{
+ const struct nfs4_layout_stateid *ls =
+ container_of(cb, struct nfs4_layout_stateid, ls_recall);
+ struct nfs4_cb_compound_hdr hdr = {
+ .ident = 0,
+ .minorversion = cb->cb_minorversion,
+ };
+
+ encode_cb_compound4args(xdr, &hdr);
+ encode_cb_sequence4args(xdr, cb, &hdr);
+ encode_cb_layout4args(xdr, ls, &hdr);
+ encode_cb_nops(&hdr);
+}
+
+static int nfs4_xdr_dec_cb_layout(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfsd4_callback *cb)
+{
+ struct nfs4_cb_compound_hdr hdr;
+ enum nfsstat4 nfserr;
+ int status;
+
+ status = decode_cb_compound4res(xdr, &hdr);
+ if (unlikely(status))
+ goto out;
+ if (cb) {
+ status = decode_cb_sequence4res(xdr, cb);
+ if (unlikely(status))
+ goto out;
+ }
+ status = decode_cb_op_status(xdr, OP_CB_LAYOUTRECALL, &nfserr);
+ if (unlikely(status))
+ goto out;
+ if (unlikely(nfserr != NFS4_OK))
+ status = nfs_cb_stat_to_errno(nfserr);
+out:
+ return status;
+}
+#endif /* CONFIG_NFSD_PNFS */
+
/*
* RPC procedure tables
*/
@@ -563,6 +659,9 @@ out:
static struct rpc_procinfo nfs4_cb_procedures[] = {
PROC(CB_NULL, NULL, cb_null, cb_null),
PROC(CB_RECALL, COMPOUND, cb_recall, cb_recall),
+#ifdef CONFIG_NFSD_PNFS
+ PROC(CB_LAYOUT, COMPOUND, cb_layout, cb_layout),
+#endif
};
static struct rpc_version nfs_cb_version4 = {