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authorPeng Tao <bergwolf@gmail.com>2012-09-25 10:55:57 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-10-09 03:32:34 +0400
commit1fd937bd7583e618df0528f0268b210f265d6910 (patch)
tree6cc162c459c5acbe7f3126cb8159e500f9dd6e38 /fs/nfs/pnfs.c
parent6296556f0b31eaff29f2a3aee2c17b7eae895b98 (diff)
downloadlinux-1fd937bd7583e618df0528f0268b210f265d6910.tar.xz
NFS41: send real read size in layoutget
For buffer read, use offst-to-isize. For direct read, use dreq->bytes_left. Signed-off-by: Peng Tao <tao.peng@emc.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 9a2bcce45282..fe624c91bd00 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1220,16 +1220,24 @@ out_forget_reply:
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 */