110  * 4. Deltas are packed tight in the remaining space, i.e. a delta
113  *    part of a delta. Delta sizes vary.
115  *    of the log, i.e. to the first delta header. Likewise, "od_head_ident"
183 	int64_t		l_mof;		/* disk addr this delta is against */
184 	int16_t		l_nb;		/* size of delta */
186 	int32_t		l_lof;		/* log offset for delta header */
187 	int32_t		l_tid;		/* transaction this delta is part of */
450 		 * Copy the delta contents to the destination buffer if  in lufs_read_log()
592 lufs_logscan_read(int32_t *addr, struct delta *d)  in lufs_logscan_read()
594 	*addr = lufs_read_log(*addr, (caddr_t)d, sizeof (struct delta));  in lufs_logscan_read()
605 lufs_logscan_skip(int32_t *addr, struct delta *d)  in lufs_logscan_skip()
610 		 * A DT_COMMIT delta has no size as such, but will  in lufs_logscan_skip()
612 		 * The next delta header is found at the beginning  in lufs_logscan_skip()
628 		 * Skip over the delta contents.  in lufs_logscan_skip()
647 	 *    If for every cancelled delta another one would've  in lufs_logscan_freecancel()
649 	 *    DT_CANCEL delta can lead to this as it is never  in lufs_logscan_freecancel()
680 lufs_logscan_addmap(int32_t *addr, struct delta *d)  in lufs_logscan_addmap()
718 		 * 1. The new delta is an exact match for an existing one,  in lufs_logscan_addmap()
721 		 *    The new delta completely supersedes the old one, so  in lufs_logscan_addmap()
723 		 *    Then add the new delta to the head of the hashchain.  in lufs_logscan_addmap()
724 		 * 2. The new delta is an exact match for an existing one,  in lufs_logscan_addmap()
731 		 *    found which overlap the new delta (happens if that is  in lufs_logscan_addmap()
735 		 *    The new delta is then added directly before this  in lufs_logscan_addmap()
738 		 *    Unless this is a DT_CANCEL delta, whose only purpose  in lufs_logscan_addmap()
740 		 *    cancellation, add the new delta at the hash chain head.  in lufs_logscan_addmap()
744 		 * which then ensures that delta merging is done in the same  in lufs_logscan_addmap()
787 				 * this may happen - an existing previous delta  in lufs_logscan_addmap()
793 				 * and we have to add the new delta immediately  in lufs_logscan_addmap()
824 		 * This is case 4., add a new delta at the head of the chain.  in lufs_logscan_addmap()
826 		 * If the new delta is a DT_CANCEL entry, we handled it by  in lufs_logscan_addmap()
828 		 * get by without actually adding the delta itself to the  in lufs_logscan_addmap()
943  *	read the delta header
944  *	add the delta to the logmap
945  *	skip over the contents to the start of the next delta header
960 	struct delta	d;  in lufs_logscan()
994  * has a delta against this byte range, and if so read it in, since
1031 			 * Found a delta in the log hash which overlaps  in lufs_merge_deltas()
1033 			 * actual delta payload from the on-disk log  in lufs_merge_deltas()
1056 				 * the delta.  in lufs_merge_deltas()