NFSv4.1 add nfs_inode book keeping for mdsthreshold

Keep track of the number of bytes read or written via buffered, direct, and
mem-mapped i/o for use by mdsthreshold size_io hints.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index cbcb6aea58a3..6620606f2687 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -395,6 +395,9 @@ mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
         dprintk("%s:Begin lo %p\n", __func__, lo);
 
         if (list_empty(&lo->plh_segs)) {
+                /* Reset MDS Threshold I/O counters */
+                NFS_I(lo->plh_inode)->write_io = 0;
+                NFS_I(lo->plh_inode)->read_io = 0;
                 if (!test_and_set_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags))
                         put_layout_hdr_locked(lo);
                 return 0;