[PATCH v1 24/52] NFSD: Add nfsd4_encode_fattr4_maxfilesize()

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From: Chuck Lever <chuck.lever@xxxxxxxxxx>

Refactor the encoder for FATTR4_MAXFILESIZE 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 |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index f247fd6f02f5..eb7bc713f85c 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3150,6 +3150,14 @@ static __be32 nfsd4_encode_fattr4_fs_locations(struct xdr_stream *xdr,
 	return nfsd4_encode_fs_locations4(xdr, args->rqstp, args->exp);
 }
 
+static __be32 nfsd4_encode_fattr4_maxfilesize(struct xdr_stream *xdr,
+					      const struct nfsd4_fattr_args *args)
+{
+	struct super_block *sb = args->exp->ex_path.mnt->mnt_sb;
+
+	return nfsd4_encode_uint64_t(xdr, sb->s_maxbytes);
+}
+
 /*
  * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
  * ourselves.
@@ -3399,10 +3407,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
 			goto out;
 	}
 	if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
-		p = xdr_reserve_space(xdr, 8);
-		if (!p)
-			goto out_resource;
-		p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
+		status = nfsd4_encode_fattr4_maxfilesize(xdr, &args);
+		if (status != nfs_ok)
+			goto out;
 	}
 	if (bmval0 & FATTR4_WORD0_MAXLINK) {
 		p = xdr_reserve_space(xdr, 4);





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