This is a note to let you know that I've just added the patch titled NFSD: Update the NFSv2 STATFS result encoder to use struct xdr_stream to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: nfsd-update-the-nfsv2-statfs-result-encoder-to-use-s.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 579834a760884d6e9710d47226a40e2cc1413a02 Author: Chuck Lever <chuck.lever@xxxxxxxxxx> Date: Fri Oct 23 19:01:38 2020 -0400 NFSD: Update the NFSv2 STATFS result encoder to use struct xdr_stream [ Upstream commit bf15229f2ced4f14946eef958336f764e30f8efb ] Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c index d6d7d07dbb1b2..39d296aecd3e7 100644 --- a/fs/nfsd/nfsxdr.c +++ b/fs/nfsd/nfsxdr.c @@ -592,19 +592,26 @@ nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p) int nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p) { + struct xdr_stream *xdr = &rqstp->rq_res_stream; struct nfsd_statfsres *resp = rqstp->rq_resp; struct kstatfs *stat = &resp->stats; - *p++ = resp->status; - if (resp->status != nfs_ok) - return xdr_ressize_check(rqstp, p); + if (!svcxdr_encode_stat(xdr, resp->status)) + return 0; + switch (resp->status) { + case nfs_ok: + p = xdr_reserve_space(xdr, XDR_UNIT * 5); + if (!p) + return 0; + *p++ = cpu_to_be32(NFSSVC_MAXBLKSIZE_V2); + *p++ = cpu_to_be32(stat->f_bsize); + *p++ = cpu_to_be32(stat->f_blocks); + *p++ = cpu_to_be32(stat->f_bfree); + *p = cpu_to_be32(stat->f_bavail); + break; + } - *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */ - *p++ = htonl(stat->f_bsize); - *p++ = htonl(stat->f_blocks); - *p++ = htonl(stat->f_bfree); - *p++ = htonl(stat->f_bavail); - return xdr_ressize_check(rqstp, p); + return 1; } int