nfsd: export proper maximum file size to the client

I noticed that we export a way to high value for the maxfilesize
attribute when debugging a client issue.  The issue didn't turn
out to be related to it, but I think we should export it, so that
clients can limit what write sizes they accept before hitting
the server.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 9d76ee311ddc..088de1355e93 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2391,7 +2391,7 @@ out_acl:
         if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
                 if ((buflen -= 8) < 0)
                         goto out_resource;
-                WRITE64(~(u64)0);
+                WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
         }
         if (bmval0 & FATTR4_WORD0_MAXLINK) {
                 if ((buflen -= 4) < 0)