sys/opencrypto/criov.c

300 crypto_cursor_init(struct crypto_buffer_cursor *cc,
303 	memset(cc, 0, sizeof(*cc));
304 	cc->cc_type = cb->cb_type;
305 	switch (cc->cc_type) {
307 		cc->cc_buf = cb->cb_buf;
308 		cc->cc_buf_len = cb->cb_buf_len;
312 		cc->cc_mbuf = cb->cb_mbuf;
315 		cc->cc_vmpage = cb->cb_vm_page;
316 		cc->cc_buf_len = cb->cb_vm_page_len;
317 		cc->cc_offset = cb->cb_vm_page_offset;
320 		cc->cc_iov = cb->cb_uio->uio_iov;
321 		cc->cc_buf_len = cb->cb_uio->uio_resid;
334 crypto_cursor_advance(struct crypto_buffer_cursor *cc, size_t amount)
338 	switch (cc->cc_type) {
340 		MPASS(cc->cc_buf_len >= amount);
341 		cc->cc_buf += amount;
342 		cc->cc_buf_len -= amount;
346 			remain = cc->cc_mbuf->m_len - cc->cc_offset;
348 				cc->cc_offset += amount;
352 			cc->cc_mbuf = cc->cc_mbuf->m_next;
353 			cc->cc_offset = 0;
359 		MPASS(cc->cc_mbuf->m_len >= cc->cc_offset + amount);
360 		cc->cc_offset += amount;
365 			    cc, amount);
366 			remain = MIN(PAGE_SIZE - cc->cc_offset, cc->cc_buf_len);
368 				cc->cc_buf_len -= amount;
369 				cc->cc_offset += amount;
372 			cc->cc_buf_len -= remain;
374 			cc->cc_vmpage++;
375 			cc->cc_offset = 0;
376 			if (amount == 0 || cc->cc_buf_len == 0)
382 			remain = cc->cc_iov->iov_len - cc->cc_offset;
384 				cc->cc_offset += amount;
387 			cc->cc_buf_len -= remain;
389 			cc->cc_iov++;
390 			cc->cc_offset = 0;
397 		panic("%s: invalid buffer type %d", __func__, cc->cc_type);
404 crypto_cursor_segment(struct crypto_buffer_cursor *cc, size_t *len)
406 	switch (cc->cc_type) {
410 		if (cc->cc_buf_len == 0) {
417 		if (cc->cc_mbuf == NULL) {
424 		panic("%s: invalid buffer type %d", __func__, cc->cc_type);
430 	switch (cc->cc_type) {
432 		*len = cc->cc_buf_len;
433 		return (cc->cc_buf);
436 		if (cc->cc_mbuf->m_flags & M_EXTPG)
437 			return (m_epg_segment(cc->cc_mbuf, cc->cc_offset, len));
438 		*len = cc->cc_mbuf->m_len - cc->cc_offset;
439 		return (mtod(cc->cc_mbuf, char *) + cc->cc_offset);
441 		*len = PAGE_SIZE - cc->cc_offset;
443 		    *cc->cc_vmpage)) + cc->cc_offset);
445 		*len = cc->cc_iov->iov_len - cc->cc_offset;
446 		return ((char *)cc->cc_iov->iov_base + cc->cc_offset);
453 crypto_cursor_copyback(struct crypto_buffer_cursor *cc, int size,
461 	switch (cc->cc_type) {
463 		MPASS(cc->cc_buf_len >= size);
464 		memcpy(cc->cc_buf, src, size);
465 		cc->cc_buf += size;
466 		cc->cc_buf_len -= size;
475 			remain = cc->cc_mbuf->m_len - cc->cc_offset;
477 			m_copyback(cc->cc_mbuf, cc->cc_offset, todo, src);
480 				cc->cc_offset += todo;
484 			cc->cc_mbuf = cc->cc_mbuf->m_next;
485 			cc->cc_offset = 0;
491 		MPASS(cc->cc_mbuf->m_len >= cc->cc_offset + size);
492 		m_copyback(cc->cc_mbuf, cc->cc_offset, size, src);
493 		cc->cc_offset += size;
498 			    *cc->cc_vmpage)) + cc->cc_offset;
499 			remain = MIN(PAGE_SIZE - cc->cc_offset, cc->cc_buf_len);
503 			cc->cc_buf_len -= todo;
505 				cc->cc_offset += todo;
509 			cc->cc_vmpage++;
510 			cc->cc_offset = 0;
517 			dst = (char *)cc->cc_iov->iov_base + cc->cc_offset;
518 			remain = cc->cc_iov->iov_len - cc->cc_offset;
522 			cc->cc_buf_len -= todo;
524 				cc->cc_offset += todo;
528 			cc->cc_iov++;
529 			cc->cc_offset = 0;
536 		panic("%s: invalid buffer type %d", __func__, cc->cc_type);
543 crypto_cursor_copydata(struct crypto_buffer_cursor *cc, int size, void *vdst)
550 	switch (cc->cc_type) {
552 		MPASS(cc->cc_buf_len >= size);
553 		memcpy(dst, cc->cc_buf, size);
554 		cc->cc_buf += size;
555 		cc->cc_buf_len -= size;
564 			remain = cc->cc_mbuf->m_len - cc->cc_offset;
566 			m_copydata(cc->cc_mbuf, cc->cc_offset, todo, dst);
569 				cc->cc_offset += todo;
573 			cc->cc_mbuf = cc->cc_mbuf->m_next;
574 			cc->cc_offset = 0;
580 		MPASS(cc->cc_mbuf->m_len >= cc->cc_offset + size);
581 		m_copydata(cc->cc_mbuf, cc->cc_offset, size, dst);
582 		cc->cc_offset += size;
587 			    *cc->cc_vmpage)) + cc->cc_offset;
588 			remain = MIN(PAGE_SIZE - cc->cc_offset, cc->cc_buf_len);
592 			cc->cc_buf_len -= todo;
594 				cc->cc_offset += todo;
598 			cc->cc_vmpage++;
599 			cc->cc_offset = 0;
606 			src = (const char *)cc->cc_iov->iov_base +
607 			    cc->cc_offset;
608 			remain = cc->cc_iov->iov_len - cc->cc_offset;
612 			cc->cc_buf_len -= todo;
614 				cc->cc_offset += todo;
618 			cc->cc_iov++;
619 			cc->cc_offset = 0;
626 		panic("%s: invalid buffer type %d", __func__, cc->cc_type);
637 crypto_cursor_copydata_noadv(struct crypto_buffer_cursor *cc, int size,
642 	copy = *cc;