[PATCH v1 28/52] NFSD: Add nfsd4_encode_fattr4_maxwrite()

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From: Chuck Lever <chuck.lever@xxxxxxxxxx>

Refactor the encoder for FATTR4_MAXWRITE into a helper. In a
subsequent patch, this helper will be called from a bitmask loop.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 fs/nfsd/nfs4xdr.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 35911ecccfbd..39ff6d1bd41d 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3176,6 +3176,12 @@ static __be32 nfsd4_encode_fattr4_maxread(struct xdr_stream *xdr,
 	return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
 }
 
+static __be32 nfsd4_encode_fattr4_maxwrite(struct xdr_stream *xdr,
+					   const struct nfsd4_fattr_args *args)
+{
+	return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
+}
+
 /*
  * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
  * ourselves.
@@ -3445,10 +3451,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
 			goto out;
 	}
 	if (bmval0 & FATTR4_WORD0_MAXWRITE) {
-		p = xdr_reserve_space(xdr, 8);
-		if (!p)
-			goto out_resource;
-		p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
+		status = nfsd4_encode_fattr4_maxwrite(xdr, &args);
+		if (status != nfs_ok)
+			goto out;
 	}
 	if (bmval1 & FATTR4_WORD1_MODE) {
 		p = xdr_reserve_space(xdr, 4);





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