Lines Matching defs:undo
151 * zone 3 (z,o): undo/redo fifo - fixed zone-2 offset array in volume header
187 * | zone-3 big-blocks for UNDO/REDO FIFO
511 * HAMMER UNDO parameters. The UNDO fifo is mapped directly in the volume
513 * and minimum of (64x8MB) = 512MB may be reserved. The size of the undo
520 * All on-disk HAMMER structures which make up elements of the UNDO FIFO
527 * All undo structures are guaranteed to not cross a 16K filesystem
528 * buffer boundary. Most undo structures are fairly small. Data spaces
530 * as part of an UNDO.
536 * Every undo record has a sequence number. This number is unrelated to
537 * transaction ids and instead collects the undo transactions associated
544 * In HAMMER version 4 the undo structure alignment is reduced from 16384
549 * undo sequence space without having to rely on information from the volume
550 * header. In addition, new REDO entries in the undo space are used to
562 * by rolling UNDO for the prior contents of the data.
606 #define HAMMER_HEAD_TYPE_UNDO 0x0043U /* random UNDO information */
615 * UNDO - Raw meta-data media updates.
683 struct hammer_fifo_undo undo;
792 * Array of zone-2 addresses for undo FIFO.
815 #define HAMMER_VOL_VERSION_FOUR 4 /* new undo/flush (2.5+) */
917 * mtime updates have UNDO, atime updates do not.
Indexes created Wed Oct 01 19:09:53 GMT 2025