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

commit 6f29b9bba7b08c6b1d6f2cc4cf750b342fc1946c upstream.

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

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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 07115b9b1ad284e9314381c7a8717f453abac4d5..1fe9cbe6445a1fa0be2df08ed7144c5d5f79188b 100644 (file)
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1331,6 +1331,9 @@ 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);