fs/zfs/sa.c

73  * layout.  The ZPL for example will usually have only about 10 different
82  * Each distinct layout is given a unique layout number and that is whats
85  * A layout only covers a single dbuf (bonus or spill).  If a set of
92  * be rewritten and could result in a new layout number being constructed
93  * as part of the rewrite if no such layout exists for the new set of
97  * Both the attribute registration and attribute layout information are
102  * The registered attributes and layout "table" information is maintained
116  * the normal byteswap processing.  The special ZAP layout attribute and
122  * and the layout/attribute ZAP attributes are available.  Because of this
200  * Special dummy layout used for buffers with no attributes.
646  * Find layout that corresponds to ordering of attributes
647  * If not found a new layout number is created and added to
648  * persistent layout tables.
778 	 * Verify that old znodes always have layout number 0.
1086 		 * Make sure layout count matches number of entries added
1095 	/* Add special layout number for old ZNODES */
1125 	sa_lot_t *layout;
1135 	while (layout = avl_destroy_nodes(&sa->sa_layout_hash_tree, &cookie)) {
1137 		while (tab = list_head(&layout->lot_idx_tab)) {
1144 	while (layout = avl_destroy_nodes(&sa->sa_layout_num_tree, &cookie)) {
1145 		kmem_free(layout->lot_attrs,
1146 		    sizeof (sa_attr_type_t) * layout->lot_attr_count);
1147 		kmem_free(layout, sizeof (sa_lot_t));
1497 	 * Deterimine layout number.  If SA node and header == 0 then
1498 	 * force the index table to the dummy "1" empty layout.
1500 	 * The layout number would only be zero for a newly created file
1509 	/* Verify header size is consistent with layout information */
1553 	sa_idx_tab_hold(os, idx_tab);	/* one for layout */
1716 		/* iterate over each attribute in layout */