[PATCH v3 4/7] NFS: Implement NFSv4.2's OFFLOAD_STATUS XDR

cel
2025-01-13T15:32:49Z

Add XDR encoding and decoding functions for the NFSv4.2
OFFLOAD_STATUS operation.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfs/nfs42xdr.c | 86 +++++++++++++++++++++++++++++++++++++++++
fs/nfs/nfs4xdr.c | 1 +
include/linux/nfs4.h | 1 +
include/linux/nfs_xdr.h | 5 ++-
4 files changed, 91 insertions(+), 2 deletions(-)

diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index ef5730c5e704..a928b7f90e59 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -35,6 +35,11 @@
#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_offload_status_maxsz (op_encode_hdr_maxsz + \
+ XDR_QUADLEN(NFS4_STATEID_SIZE))
+#define decode_offload_status_maxsz (op_decode_hdr_maxsz + \
+ 2 /* osr_count */ + \
+ 2 /* osr_complete */)
#define encode_copy_notify_maxsz (op_encode_hdr_maxsz + \
XDR_QUADLEN(NFS4_STATEID_SIZE) + \
1 + /* nl4_type */ \
@@ -143,6 +148,14 @@
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_offload_cancel_maxsz)
+#define NFS4_enc_offload_status_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz + \
+ encode_putfh_maxsz + \
+ encode_offload_status_maxsz)
+#define NFS4_dec_offload_status_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_offload_status_maxsz)
#define NFS4_enc_copy_notify_sz (compound_encode_hdr_maxsz + \
encode_putfh_maxsz + \
encode_copy_notify_maxsz)
@@ -343,6 +356,14 @@ static void encode_offload_cancel(struct xdr_stream *xdr,
encode_nfs4_stateid(xdr, &args->osa_stateid);
}

+static void encode_offload_status(struct xdr_stream *xdr,
+ const struct nfs42_offload_status_args *args,
+ struct compound_hdr *hdr)
+{
+ encode_op_hdr(xdr, OP_OFFLOAD_STATUS, decode_offload_status_maxsz, hdr);
+ encode_nfs4_stateid(xdr, &args->osa_stateid);
+}
+
static void encode_copy_notify(struct xdr_stream *xdr,
const struct nfs42_copy_notify_args *args,
struct compound_hdr *hdr)
@@ -567,6 +588,25 @@ static void nfs4_xdr_enc_offload_cancel(struct rpc_rqst *req,
encode_nops(&hdr);
}

+/*
+ * Encode OFFLOAD_STATUS request
+ */
+static void nfs4_xdr_enc_offload_status(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_status(xdr, args, &hdr);
+ encode_nops(&hdr);
+}
+
/*
* Encode COPY_NOTIFY request
*/
@@ -919,6 +959,26 @@ static int decode_offload_cancel(struct xdr_stream *xdr,
return decode_op_hdr(xdr, OP_OFFLOAD_CANCEL);
}

+static int decode_offload_status(struct xdr_stream *xdr,
+ struct nfs42_offload_status_res *res)
+{
+ ssize_t result;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_OFFLOAD_STATUS);
+ if (status)
+ return status;
+ /* osr_count */
+ if (xdr_stream_decode_u64(xdr, &res->osr_count) < 0)
+ return -EIO;
+ /* osr_complete<1> */
+ result = xdr_stream_decode_uint32_array(xdr, &res->osr_complete, 1);
+ if (result < 0)
+ return -EIO;
+ res->complete_count = result;
+ return 0;
+}
+
static int decode_copy_notify(struct xdr_stream *xdr,
struct nfs42_copy_notify_res *res)
{
@@ -1368,6 +1428,32 @@ static int nfs4_xdr_dec_offload_cancel(struct rpc_rqst *rqstp,
return status;
}

+/*
+ * Decode OFFLOAD_STATUS response
+ */
+static int nfs4_xdr_dec_offload_status(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_status(xdr, res);
+
+out:
+ return status;
+}
+
/*
* Decode COPY_NOTIFY response
*/
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index e8ac3f615f93..08be0a0cce24 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -7702,6 +7702,7 @@ const struct rpc_procinfo nfs4_procedures[] = {
PROC42(CLONE, enc_clone, dec_clone),
PROC42(COPY, enc_copy, dec_copy),
PROC42(OFFLOAD_CANCEL, enc_offload_cancel, dec_offload_cancel),
+ PROC42(OFFLOAD_STATUS, enc_offload_status, dec_offload_status),
PROC42(COPY_NOTIFY, enc_copy_notify, dec_copy_notify),
PROC(LOOKUPP, enc_lookupp, dec_lookupp),
PROC42(LAYOUTERROR, enc_layouterror, dec_layouterror),
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 8d7430d9f218..5de96243a252 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -695,6 +695,7 @@ enum {
NFSPROC4_CLNT_LISTXATTRS,
NFSPROC4_CLNT_REMOVEXATTR,
NFSPROC4_CLNT_READ_PLUS,
+ NFSPROC4_CLNT_OFFLOAD_STATUS,
};

/* nfs41 types */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 559273a0f16d..9ac6c7a26b44 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1520,8 +1520,9 @@ struct nfs42_offload_status_args {

struct nfs42_offload_status_res {
struct nfs4_sequence_res osr_seq_res;
- uint64_t osr_count;
- int osr_status;
+ u64 osr_count;
+ int complete_count;
+ u32 osr_complete;
};

struct nfs42_copy_notify_args {
--
2.47.0