crc32_ext
crc = __get_buf_crc(leaf, crc32_ext);
*p_crc = crc32_ext(src, count, *p_crc);
sp->hdrDigest = (digest_t *)crc32_ext;
sp->dataDigest = (digest_t *)crc32_ext;
uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
iscsi_crc32_ext(buf, size, ocrc) : crc32_ext(buf, size, ocrc))
rec_crc = crc32_ext(cursor.data, data_len, rec_crc);
uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
crc2 = crc32_ext(buf, n, crc2);
uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
crc2 = crc32_ext(buf, n, crc2);