nfs: Add ALLOCATE support

[karo-tx-linux.git] / fs / nfs / nfs42xdr.c

diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index c90469b604b8b0045fa8eaac01a07b0fbb0f9114..4248d034479c992cfa8920dabcf09833dec9d1c1 100644 (file)
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -4,6 +4,12 @@
 #ifndef __LINUX_FS_NFS_NFS4_2XDR_H
 #define __LINUX_FS_NFS_NFS4_2XDR_H
 
+#define encode_fallocate_maxsz         (encode_stateid_maxsz + \
+                                        2 /* offset */ + \
+                                        2 /* length */)
+#define encode_allocate_maxsz          (op_encode_hdr_maxsz + \
+                                        encode_fallocate_maxsz)
+#define decode_allocate_maxsz          (op_decode_hdr_maxsz)
 #define encode_seek_maxsz              (op_encode_hdr_maxsz + \
                                         encode_stateid_maxsz + \
                                         2 /* offset */ + \
@@ -14,6 +20,12 @@
                                         2 /* offset */ + \
                                         2 /* length */)
 
+#define NFS4_enc_allocate_sz           (compound_encode_hdr_maxsz + \
+                                        encode_putfh_maxsz + \
+                                        encode_allocate_maxsz)
+#define NFS4_dec_allocate_sz           (compound_decode_hdr_maxsz + \
+                                        decode_putfh_maxsz + \
+                                        decode_allocate_maxsz)
 #define NFS4_enc_seek_sz               (compound_encode_hdr_maxsz + \
                                         encode_putfh_maxsz + \
                                         encode_seek_maxsz)
@@ -22,6 +34,22 @@
                                         decode_seek_maxsz)
 
 
+static void encode_fallocate(struct xdr_stream *xdr,
+                            struct nfs42_falloc_args *args)
+{
+       encode_nfs4_stateid(xdr, &args->falloc_stateid);
+       encode_uint64(xdr, args->falloc_offset);
+       encode_uint64(xdr, args->falloc_length);
+}
+
+static void encode_allocate(struct xdr_stream *xdr,
+                           struct nfs42_falloc_args *args,
+                           struct compound_hdr *hdr)
+{
+       encode_op_hdr(xdr, OP_ALLOCATE, decode_allocate_maxsz, hdr);
+       encode_fallocate(xdr, args);
+}
+
 static void encode_seek(struct xdr_stream *xdr,
                        struct nfs42_seek_args *args,
                        struct compound_hdr *hdr)
@@ -32,6 +60,24 @@ static void encode_seek(struct xdr_stream *xdr,
        encode_uint32(xdr, args->sa_what);
 }
 
+/*
+ * Encode ALLOCATE request
+ */
+static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
+                                 struct xdr_stream *xdr,
+                                 struct nfs42_falloc_args *args)
+{
+       struct compound_hdr hdr = {
+               .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+       };
+
+       encode_compound_hdr(xdr, req, &hdr);
+       encode_sequence(xdr, &args->seq_args, &hdr);
+       encode_putfh(xdr, args->falloc_fh, &hdr);
+       encode_allocate(xdr, args, &hdr);
+       encode_nops(&hdr);
+}
+
 /*
  * Encode SEEK request
  */
@@ -50,6 +96,11 @@ static void nfs4_xdr_enc_seek(struct rpc_rqst *req,
        encode_nops(&hdr);
 }
 
+static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
+{
+       return decode_op_hdr(xdr, OP_ALLOCATE);
+}
+
 static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
 {
        int status;
@@ -72,6 +123,30 @@ out_overflow:
        return -EIO;
 }
 
+/*
+ * Decode ALLOCATE request
+ */
+static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
+                                struct xdr_stream *xdr,
+                                struct nfs42_falloc_res *res)
+{
+       struct compound_hdr hdr;
+       int status;
+
+       status = decode_compound_hdr(xdr, &hdr);
+       if (status)
+               goto out;
+       status = decode_sequence(xdr, &res->seq_res, rqstp);
+       if (status)
+               goto out;
+       status = decode_putfh(xdr);
+       if (status)
+               goto out;
+       status = decode_allocate(xdr, res);
+out:
+       return status;
+}
+
 /*
  * Decode SEEK request
  */