HAMMER_BUFSIZE
#define HAMMER_MIN_VOL_JUNK (HAMMER_BUFSIZE * 16) /* 256 KB */
(((data_len) >= HAMMER_BUFSIZE) ? \
(((data_len) >= HAMMER_BUFSIZE) ? \
(HAMMER_BIGBLOCK_SIZE / HAMMER_BUFSIZE)
#define HAMMER_HBUFSIZE (HAMMER_BUFSIZE / 2)
#define HAMMER_BUFMASK (HAMMER_BUFSIZE - 1)
#define HAMMER_BUFSIZE64 ((uint64_t)HAMMER_BUFSIZE)