1 files changed, 25 insertions, 10 deletions

diff --git a/drivers/staging/lustre/lustre/llite/vvp_object.c b/drivers/staging/lustre/lustre/llite/vvp_object.c
index 25973dedd9a2..65b6db1b71b4 100644
--- a/drivers/staging/lustre/lustre/llite/vvp_object.c
+++ b/drivers/staging/lustre/lustre/llite/vvp_object.c
@@ -120,13 +120,28 @@ static int vvp_attr_set(const struct lu_env *env, struct cl_object *obj,
 	return 0;
 }
 
-int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
-		const struct cl_object_conf *conf)
+static int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
+			const struct cl_object_conf *conf)
 {
 	struct ll_inode_info *lli = ll_i2info(conf->coc_inode);
 
 	if (conf->coc_opc == OBJECT_CONF_INVALIDATE) {
-		lli->lli_layout_gen = LL_LAYOUT_GEN_NONE;
+		CDEBUG(D_VFSTRACE, DFID ": losing layout lock\n",
+		       PFID(&lli->lli_fid));
+
+		ll_layout_version_set(lli, LL_LAYOUT_GEN_NONE);
+
+		/* Clean up page mmap for this inode.
+		 * The reason for us to do this is that if the page has
+		 * already been installed into memory space, the process
+		 * can access it without interacting with lustre, so this
+		 * page may be stale due to layout change, and the process
+		 * will never be notified.
+		 * This operation is expensive but mmap processes have to pay
+		 * a price themselves. */
+		unmap_mapping_range(conf->coc_inode->i_mapping,
+				    0, OBD_OBJECT_EOF, 0);
+
 		return 0;
 	}
 
@@ -134,18 +149,18 @@ int vvp_conf_set(const struct lu_env *env, struct cl_object *obj,
 		return 0;
 
 	if (conf->u.coc_md != NULL && conf->u.coc_md->lsm != NULL) {
-		CDEBUG(D_VFSTRACE, "layout lock change: %u -> %u\n",
-			lli->lli_layout_gen,
-			conf->u.coc_md->lsm->lsm_layout_gen);
+		CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n",
+		       PFID(&lli->lli_fid), lli->lli_layout_gen,
+		       conf->u.coc_md->lsm->lsm_layout_gen);
 
 		lli->lli_has_smd = lsm_has_objects(conf->u.coc_md->lsm);
-		lli->lli_layout_gen = conf->u.coc_md->lsm->lsm_layout_gen;
+		ll_layout_version_set(lli, conf->u.coc_md->lsm->lsm_layout_gen);
 	} else {
-		CDEBUG(D_VFSTRACE, "layout lock destroyed: %u.\n",
-			lli->lli_layout_gen);
+		CDEBUG(D_VFSTRACE, DFID ": layout nuked: %u.\n",
+		       PFID(&lli->lli_fid), lli->lli_layout_gen);
 
 		lli->lli_has_smd = false;
-		lli->lli_layout_gen = LL_LAYOUT_GEN_EMPTY;
+		ll_layout_version_set(lli, LL_LAYOUT_GEN_EMPTY);
 	}
 	return 0;
 }