5.10-stable review patch. If anyone has any objections, please let me know.
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From: Chuck Lever chuck.lever@oracle.com
[ Upstream commit 9a9c8923b3efd593d0e6a405efef9d58c6e6804b ]
Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfsd/nfs3proc.c | 5 +++-- fs/nfsd/nfs3xdr.c | 34 ++++++++++++++++++---------------- fs/nfsd/xdr3.h | 1 + 3 files changed, 22 insertions(+), 18 deletions(-)
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index 60e8c25be7571..e8d772f2c7769 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -126,14 +126,15 @@ nfsd3_proc_readlink(struct svc_rqst *rqstp) { struct nfsd_fhandle *argp = rqstp->rq_argp; struct nfsd3_readlinkres *resp = rqstp->rq_resp; - char *buffer = page_address(*(rqstp->rq_next_page++));
dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
/* Read the symlink. */ fh_copy(&resp->fh, &argp->fh); resp->len = NFS3_MAXPATHLEN; - resp->status = nfsd_readlink(rqstp, &resp->fh, buffer, &resp->len); + resp->pages = rqstp->rq_next_page++; + resp->status = nfsd_readlink(rqstp, &resp->fh, + page_address(*resp->pages), &resp->len); return rpc_success; }
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index 29b923a497f48..352691c3e246a 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -977,26 +977,28 @@ nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) int nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p) { + struct xdr_stream *xdr = &rqstp->rq_res_stream; struct nfsd3_readlinkres *resp = rqstp->rq_resp; struct kvec *head = rqstp->rq_res.head;
- *p++ = resp->status; - p = encode_post_op_attr(rqstp, p, &resp->fh); - if (resp->status == 0) { - *p++ = htonl(resp->len); - xdr_ressize_check(rqstp, p); - rqstp->rq_res.page_len = resp->len; - if (resp->len & 3) { - /* need to pad the tail */ - rqstp->rq_res.tail[0].iov_base = p; - *p = 0; - rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); - } - if (svc_encode_result_payload(rqstp, head->iov_len, resp->len)) + if (!svcxdr_encode_nfsstat3(xdr, resp->status)) + return 0; + switch (resp->status) { + case nfs_ok: + if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh)) return 0; - return 1; - } else - return xdr_ressize_check(rqstp, p); + if (xdr_stream_encode_u32(xdr, resp->len) < 0) + return 0; + xdr_write_pages(xdr, resp->pages, 0, resp->len); + if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0) + return 0; + break; + default: + if (!svcxdr_encode_post_op_attr(rqstp, xdr, &resp->fh)) + return 0; + } + + return 1; }
/* READ */ diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h index 7db4ee17aa209..1d633c5d5fa28 100644 --- a/fs/nfsd/xdr3.h +++ b/fs/nfsd/xdr3.h @@ -137,6 +137,7 @@ struct nfsd3_readlinkres { __be32 status; struct svc_fh fh; __u32 len; + struct page **pages; };
struct nfsd3_readres {