399 	 * file handles, so they require that all layers support them.  in ovl_lower_dir()
548 		pr_err("upper fs is r/o, try multi-lower layers mount\n");  in ovl_get_upper()
967 		 * as all lower layers with null uuid are on the same fs.  in ovl_lower_uuid_ok()
1028  * The fsid after the last lower fsid is used for the data layers.
1038 			  struct ovl_fs_context *ctx, struct ovl_layer *layers)  in ovl_get_layers()  argument
1050 	 * and the last fsid is reserved for "null fs" of the data layers.  in ovl_get_layers()
1055 	 * All lower layers that share the same fs as upper layer, use the same  in ovl_get_layers()
1086 		 * Check if lower root conflicts with this overlay layers before  in ovl_get_layers()
1113 		 * Make lower layers R/O.  That way fchmod/fchown on lower file  in ovl_get_layers()
1118 		layers[ofs->numlayer].trap = trap;  in ovl_get_layers()
1119 		layers[ofs->numlayer].mnt = mnt;  in ovl_get_layers()
1120 		layers[ofs->numlayer].idx = ofs->numlayer;  in ovl_get_layers()
1121 		layers[ofs->numlayer].fsid = fsid;  in ovl_get_layers()
1122 		layers[ofs->numlayer].fs = &ofs->fs[fsid];  in ovl_get_layers()
1131 	 * When all layers on same fs, overlay can use real inode numbers.  in ovl_get_layers()
1141 			pr_info("\"xino=on\" is useless with all layers on same fs, ignore.\n");  in ovl_get_layers()
1168 					    struct ovl_layer *layers)  in ovl_get_lowerstack()  argument
1204 	err = ovl_get_layers(sb, ofs, ctx, layers);  in ovl_get_lowerstack()
1209 	/* Data-only layers are not merged in root directory */  in ovl_get_lowerstack()
1219 		lowerstack[i].layer = &ofs->layers[i + 1];  in ovl_get_lowerstack()
1262  * Check if any of the layers or work dirs overlap.
1290 				      ofs->layers[i].mnt->mnt_root,  in ovl_check_overlapping_layers()
1343 	struct ovl_layer *layers;  in ovl_fill_super()  local
1370 	layers = kcalloc(ctx->nr + 1, sizeof(struct ovl_layer), GFP_KERNEL);  in ovl_fill_super()
1371 	if (!layers)  in ovl_fill_super()
1376 		kfree(layers);  in ovl_fill_super()
1379 	ofs->layers = layers;  in ovl_fill_super()
1413 		err = ovl_get_upper(sb, ofs, &layers[0], &ctx->upper);  in ovl_fill_super()
1437 	oe = ovl_get_lowerstack(sb, ctx, ofs, layers);  in ovl_fill_super()
1485 	 * if all layers support file handles.  in ovl_fill_super()