NFS OFFLOAD_CANCEL xdr

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

6 files changed, 84 insertions, 0 deletions

diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 5966e1e7b1f5..09a540d035b8 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -26,6 +26,9 @@
                                          NFS42_WRITE_RES_SIZE + \
                                          1 /* cr_consecutive */ + \
                                          1 /* cr_synchronous */)
+#define encode_offload_cancel_maxsz     (op_encode_hdr_maxsz + \
+                                         XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_offload_cancel_maxsz     (op_decode_hdr_maxsz)
 #define encode_deallocate_maxsz         (op_encode_hdr_maxsz + \
                                          encode_fallocate_maxsz)
 #define decode_deallocate_maxsz         (op_decode_hdr_maxsz)
@@ -75,6 +78,12 @@
                                          decode_putfh_maxsz + \
                                          decode_copy_maxsz + \
                                          decode_commit_maxsz)
+#define NFS4_enc_offload_cancel_sz      (compound_encode_hdr_maxsz + \
+                                         encode_putfh_maxsz + \
+                                         encode_offload_cancel_maxsz)
+#define NFS4_dec_offload_cancel_sz      (compound_decode_hdr_maxsz + \
+                                         decode_putfh_maxsz + \
+                                         decode_offload_cancel_maxsz)
 #define NFS4_enc_deallocate_sz          (compound_encode_hdr_maxsz + \
                                          encode_putfh_maxsz + \
                                          encode_deallocate_maxsz + \
@@ -145,6 +154,14 @@ static void encode_copy(struct xdr_stream *xdr,
         encode_uint32(xdr, 0); /* src server list */
 }
 
+static void encode_offload_cancel(struct xdr_stream *xdr,
+                                  const struct nfs42_offload_status_args *args,
+                                  struct compound_hdr *hdr)
+{
+        encode_op_hdr(xdr, OP_OFFLOAD_CANCEL, decode_offload_cancel_maxsz, hdr);
+        encode_nfs4_stateid(xdr, &args->osa_stateid);
+}
+
 static void encode_deallocate(struct xdr_stream *xdr,
                               const struct nfs42_falloc_args *args,
                               struct compound_hdr *hdr)
@@ -261,6 +278,25 @@ static void nfs4_xdr_enc_copy(struct rpc_rqst *req,
 }
 
 /*
+ * Encode OFFLOAD_CANEL request
+ */
+static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
+                                        struct xdr_stream *xdr,
+                                        const void *data)
+{
+        const struct nfs42_offload_status_args *args = data;
+        struct compound_hdr hdr = {
+                .minorversion = nfs4_xdr_minorversion(&args->osa_seq_args),
+        };
+
+        encode_compound_hdr(xdr, req, &hdr);
+        encode_sequence(xdr, &args->osa_seq_args, &hdr);
+        encode_putfh(xdr, args->osa_src_fh, &hdr);
+        encode_offload_cancel(xdr, args, &hdr);
+        encode_nops(&hdr);
+}
+
+/*
  * Encode DEALLOCATE request
  */
 static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
@@ -413,6 +449,12 @@ static int decode_copy(struct xdr_stream *xdr, struct nfs42_copy_res *res)
         return decode_copy_requirements(xdr, res);
 }
 
+static int decode_offload_cancel(struct xdr_stream *xdr,
+                                 struct nfs42_offload_status_res *res)
+{
+        return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
+}
+
 static int decode_deallocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 {
         return decode_op_hdr(xdr, OP_DEALLOCATE);
@@ -513,6 +555,32 @@ out:
 }
 
 /*
+ * Decode OFFLOAD_CANCEL response
+ */
+static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst *rqstp,
+                                       struct xdr_stream *xdr,
+                                       void *data)
+{
+        struct nfs42_offload_status_res *res = data;
+        struct compound_hdr hdr;
+        int status;
+
+        status = decode_compound_hdr(xdr, &hdr);
+        if (status)
+                goto out;
+        status = decode_sequence(xdr, &res->osr_seq_res, rqstp);
+        if (status)
+                goto out;
+        status = decode_putfh(xdr);
+        if (status)
+                goto out;
+        status = decode_offload_cancel(xdr, res);
+
+out:
+        return status;
+}
+
+/*
  * Decode DEALLOCATE request
  */
 static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 124a9f97c366..b22b41eff9c0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -9620,6 +9620,7 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
                 | NFS_CAP_LGOPEN
                 | NFS_CAP_ALLOCATE
                 | NFS_CAP_COPY
+                | NFS_CAP_OFFLOAD_CANCEL
                 | NFS_CAP_DEALLOCATE
                 | NFS_CAP_SEEK
                 | NFS_CAP_LAYOUTSTATS
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index cd41d2577a04..b7bde12d8cd5 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -7789,6 +7789,7 @@ const struct rpc_procinfo nfs4_procedures[] = {
         PROC42(LAYOUTSTATS,     enc_layoutstats,        dec_layoutstats),
         PROC42(CLONE,           enc_clone,              dec_clone),
         PROC42(COPY,            enc_copy,               dec_copy),
+        PROC42(OFFLOAD_CANCEL,  enc_offload_cancel,     dec_offload_cancel),
         PROC(LOOKUPP,           enc_lookupp,            dec_lookupp),
 };
 
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 57ffaa20d564..c44b87293229 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -527,6 +527,7 @@ enum {
         NFSPROC4_CLNT_LAYOUTSTATS,
         NFSPROC4_CLNT_CLONE,
         NFSPROC4_CLNT_COPY,
+        NFSPROC4_CLNT_OFFLOAD_CANCEL,
 
         NFSPROC4_CLNT_LOOKUPP,
 };
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 2c18d618604e..fbc735f08d7e 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -255,5 +255,6 @@ struct nfs_server {
 #define NFS_CAP_LAYOUTSTATS     (1U << 22)
 #define NFS_CAP_CLONE           (1U << 23)
 #define NFS_CAP_COPY            (1U << 24)
+#define NFS_CAP_OFFLOAD_CANCEL  (1U << 25)
 
 #endif
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 3b7325cfb291..85e928a56cef 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1403,6 +1403,18 @@ struct nfs42_copy_res {
         struct nfs_commitres            commit_res;
 };
 
+struct nfs42_offload_status_args {
+        struct nfs4_sequence_args       osa_seq_args;
+        struct nfs_fh                   *osa_src_fh;
+        nfs4_stateid                    osa_stateid;
+};
+
+struct nfs42_offload_status_res {
+        struct nfs4_sequence_res        osr_seq_res;
+        uint64_t                        osr_count;
+        int                             osr_status;
+};
+
 struct nfs42_seek_args {
         struct nfs4_sequence_args       seq_args;