NFSv4/pnfs: Reset the layout state after a layoutreturn

[ Upstream commit 6d6d7f91cc8c111d40416ac9240a3bb9396c5235 ]

If there are still layout segments in the layout plh_return_lsegs list
after a layout return, we should be resetting the state to ensure they
eventually get returned as well.

Fixes: 68f7447 ("pNFS: Do not free layout segments that are marked for return")
Signed-off-by: Trond Myklebust <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
(cherry picked from commit 65346f970490e792fe5ae8d931aece60824c4f7e)
Signed-off-by: Vijayendra Suman <[email protected]>

Author: Trond Myklebust

fs/nfs/pnfs.c

@@ -742,6 +742,14 @@ pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
 	return remaining;
 }
 
+static void pnfs_reset_return_info(struct pnfs_layout_hdr *lo)
+{
+	struct pnfs_layout_segment *lseg;
+
+	list_for_each_entry(lseg, &lo->plh_return_segs, pls_list)
+		pnfs_set_plh_return_info(lo, lseg->pls_range.iomode, 0);
+}
+
 static void
 pnfs_free_returned_lsegs(struct pnfs_layout_hdr *lo,
 		struct list_head *free_me,
@@ -1289,6 +1297,7 @@ void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
 		pnfs_mark_matching_lsegs_invalid(lo, &freeme, range, seq);
 		pnfs_free_returned_lsegs(lo, &freeme, range, seq);
 		pnfs_set_layout_stateid(lo, stateid, NULL, true);
+		pnfs_reset_return_info(lo);
 	} else
 		pnfs_mark_layout_stateid_invalid(lo, &freeme);
 out_unlock: