提交 1fd937bd 编写于 作者: P Peng Tao 提交者: Trond Myklebust

NFS41: send real read size in layoutget

For buffer read, use offst-to-isize.

For direct read, use dreq->bytes_left.
Signed-off-by: NPeng Tao <tao.peng@emc.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
上级 6296556f
......@@ -1220,16 +1220,24 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
void
pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
{
u64 rd_size = req->wb_bytes;
BUG_ON(pgio->pg_lseg != NULL);
if (req->wb_offset != req->wb_pgbase) {
nfs_pageio_reset_read_mds(pgio);
return;
}
if (pgio->pg_dreq == NULL)
rd_size = i_size_read(pgio->pg_inode) - req_offset(req);
else
rd_size = nfs_dreq_bytes_left(pgio->pg_dreq);
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
req->wb_context,
req_offset(req),
req->wb_bytes,
rd_size,
IOMODE_READ,
GFP_KERNEL);
/* If no lseg, fall back to read through mds */
......
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