linux-kernel - [PATCH 4.9 099/116] pNFS: Clear NFS_LAYOUT_RETURN_REQUESTED when invalidating the layout stateid

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Date:   Fri,  6 Jan 2017 22:44:21 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Trond Myklebust <trond.myklebust@...marydata.com>
Subject: [PATCH 4.9 099/116] pNFS: Clear NFS_LAYOUT_RETURN_REQUESTED when invalidating the layout stateid

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Trond Myklebust <trond.myklebust@...marydata.com>

commit ae5a459d5f65c3e83f3e14068dde5fb9c9d81807 upstream.

We must ensure that we don't schedule a layoutreturn if the layout stateid
has been marked as invalid.

Fixes: 2a59a0411671e ("pNFS: Fix pnfs_set_layout_stateid() to clear...")
Signed-off-by: Trond Myklebust <trond.myklebust@...marydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/nfs/pnfs.c |   17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -299,6 +299,14 @@ pnfs_put_layout_hdr(struct pnfs_layout_h
 	}
 }
 
+static void
+pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo)
+{
+	lo->plh_return_iomode = 0;
+	lo->plh_return_seq = 0;
+	clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
+}
+
 /*
  * Mark a pnfs_layout_hdr and all associated layout segments as invalid
  *
@@ -317,6 +325,7 @@ pnfs_mark_layout_stateid_invalid(struct
 	};
 
 	set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
+	pnfs_clear_layoutreturn_info(lo);
 	return pnfs_mark_matching_lsegs_invalid(lo, lseg_list, &range, 0);
 }
 
@@ -818,14 +827,6 @@ pnfs_destroy_all_layouts(struct nfs_clie
 	pnfs_destroy_layouts_byclid(clp, false);
 }
 
-static void
-pnfs_clear_layoutreturn_info(struct pnfs_layout_hdr *lo)
-{
-	lo->plh_return_iomode = 0;
-	lo->plh_return_seq = 0;
-	clear_bit(NFS_LAYOUT_RETURN_REQUESTED, &lo->plh_flags);
-}
-
 /* update lo->plh_stateid with new if is more recent */
 void
 pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new,