UBIFS_MIN_BUD_LEBS
if (max_buds < UBIFS_MIN_BUD_LEBS)
max_buds = UBIFS_MIN_BUD_LEBS;
max_bytes = (long long)c->leb_size * UBIFS_MIN_BUD_LEBS;
#define UBIFS_MIN_JNL_LEBS (UBIFS_MIN_LOG_LEBS + UBIFS_MIN_BUD_LEBS)
#define UBIFS_MIN_MAIN_LEBS (UBIFS_MIN_BUD_LEBS + 6)