NFS: Do cleanup before resetting pageio read/write to mds

There is a reference leak of layout segment after resetting
pageio read/write to mds.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Cc: stable@vger.kernel.org # v4.0+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index ae0ff7a11b40339a728ca819283400c7f5e25a42..01b8cc8e8cfc436784052bf5e92a7c21a1230012 100644 (file)
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -72,6 +72,9 @@ void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio)
 {
        struct nfs_pgio_mirror *mirror;
 
+       if (pgio->pg_ops && pgio->pg_ops->pg_cleanup)
+               pgio->pg_ops->pg_cleanup(pgio);
+
        pgio->pg_ops = &nfs_pgio_rw_ops;
 
        /* read path should never have more than one mirror */

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 388f48079c43839fa9c8222d78556282920858f2..72624dc4a623b894ca0be949c5feab1cec455e02 100644 (file)
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1351,6 +1351,9 @@ void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio)
 {
        struct nfs_pgio_mirror *mirror;
 
+       if (pgio->pg_ops && pgio->pg_ops->pg_cleanup)
+               pgio->pg_ops->pg_cleanup(pgio);
+
        pgio->pg_ops = &nfs_pgio_rw_ops;
 
        nfs_pageio_stop_mirroring(pgio);