464 static void init_frame_desc(struct ceph_frame_desc *desc, int tag,  in init_frame_desc()  argument
469 	memset(desc, 0, sizeof(*desc));  in init_frame_desc()
471 	desc->fd_tag = tag;  in init_frame_desc()
472 	desc->fd_seg_cnt = calc_segment_count(lens, len_cnt);  in init_frame_desc()
473 	BUG_ON(desc->fd_seg_cnt > CEPH_FRAME_MAX_SEGMENT_COUNT);  in init_frame_desc()
474 	for (i = 0; i < desc->fd_seg_cnt; i++) {  in init_frame_desc()
475 		desc->fd_lens[i] = lens[i];  in init_frame_desc()
476 		desc->fd_aligns[i] = frame_aligns[i];  in init_frame_desc()
485 static void encode_preamble(const struct ceph_frame_desc *desc, void *p)  in encode_preamble()  argument
493 	ceph_encode_8(&p, desc->fd_tag);  in encode_preamble()
494 	ceph_encode_8(&p, desc->fd_seg_cnt);  in encode_preamble()
495 	for (i = 0; i < desc->fd_seg_cnt; i++) {  in encode_preamble()
496 		ceph_encode_32(&p, desc->fd_lens[i]);  in encode_preamble()
497 		ceph_encode_16(&p, desc->fd_aligns[i]);  in encode_preamble()
503 static int decode_preamble(void *p, struct ceph_frame_desc *desc)  in decode_preamble()  argument
517 	memset(desc, 0, sizeof(*desc));  in decode_preamble()
519 	desc->fd_tag = ceph_decode_8(&p);  in decode_preamble()
520 	desc->fd_seg_cnt = ceph_decode_8(&p);  in decode_preamble()
521 	if (desc->fd_seg_cnt < 1 ||  in decode_preamble()
522 	    desc->fd_seg_cnt > CEPH_FRAME_MAX_SEGMENT_COUNT) {  in decode_preamble()
523 		pr_err("bad segment count %d\n", desc->fd_seg_cnt);  in decode_preamble()
526 	for (i = 0; i < desc->fd_seg_cnt; i++) {  in decode_preamble()
527 		desc->fd_lens[i] = ceph_decode_32(&p);  in decode_preamble()
528 		desc->fd_aligns[i] = ceph_decode_16(&p);  in decode_preamble()
531 	if (desc->fd_lens[0] < 0 ||  in decode_preamble()
532 	    desc->fd_lens[0] > CEPH_MSG_MAX_CONTROL_LEN) {  in decode_preamble()
533 		pr_err("bad control segment length %d\n", desc->fd_lens[0]);  in decode_preamble()
536 	if (desc->fd_lens[1] < 0 ||  in decode_preamble()
537 	    desc->fd_lens[1] > CEPH_MSG_MAX_FRONT_LEN) {  in decode_preamble()
538 		pr_err("bad front segment length %d\n", desc->fd_lens[1]);  in decode_preamble()
541 	if (desc->fd_lens[2] < 0 ||  in decode_preamble()
542 	    desc->fd_lens[2] > CEPH_MSG_MAX_MIDDLE_LEN) {  in decode_preamble()
543 		pr_err("bad middle segment length %d\n", desc->fd_lens[2]);  in decode_preamble()
546 	if (desc->fd_lens[3] < 0 ||  in decode_preamble()
547 	    desc->fd_lens[3] > CEPH_MSG_MAX_DATA_LEN) {  in decode_preamble()
548 		pr_err("bad data segment length %d\n", desc->fd_lens[3]);  in decode_preamble()
556 	if (!desc->fd_lens[desc->fd_seg_cnt - 1]) {  in decode_preamble()
558 		       desc->fd_seg_cnt);  in decode_preamble()
801 	SHASH_DESC_ON_STACK(desc, con->v2.hmac_tfm);  /* tfm arg is ignored */  in hmac_sha256()
813 	desc->tfm = con->v2.hmac_tfm;  in hmac_sha256()
814 	ret = crypto_shash_init(desc);  in hmac_sha256()
821 		ret = crypto_shash_update(desc, kvecs[i].iov_base,  in hmac_sha256()
827 	ret = crypto_shash_final(desc, hmac);  in hmac_sha256()
830 	shash_desc_zero(desc);  in hmac_sha256()
1329 	struct ceph_frame_desc desc;  in __prepare_control()  local
1339 	init_frame_desc(&desc, tag, &total_len, 1);  in __prepare_control()
1340 	encode_preamble(&desc, base);  in __prepare_control()
1738 	struct ceph_frame_desc desc;  in prepare_message()  local
1751 	init_frame_desc(&desc, FRAME_TAG_MESSAGE, lens, 4);  in prepare_message()
1752 	encode_preamble(&desc, con->v2.out_buf);  in prepare_message()
2138 	struct ceph_frame_desc *desc = &con->v2.in_desc;  in prepare_skip_message()  local
2141 	dout("%s con %p %d+%d+%d\n", __func__, con, desc->fd_lens[1],  in prepare_skip_message()
2142 	     desc->fd_lens[2], desc->fd_lens[3]);  in prepare_skip_message()
2144 	tail_len = __tail_onwire_len(desc->fd_lens[1], desc->fd_lens[2],  in prepare_skip_message()
2145 				     desc->fd_lens[3], con_secure(con));  in prepare_skip_message()
2863 	struct ceph_frame_desc *desc = &con->v2.in_desc;  in process_message_header()  local
2887 	fill_header(&hdr, hdr2, desc->fd_lens[1], desc->fd_lens[2],  in process_message_header()
2888 		    desc->fd_lens[3], &con->peer_name);  in process_message_header()
2962 	struct ceph_frame_desc *desc = &con->v2.in_desc;  in handle_preamble()  local
2974 	ret = decode_preamble(con->v2.in_buf, desc);  in handle_preamble()
2984 	     con, desc->fd_tag, desc->fd_seg_cnt, desc->fd_lens[0],  in handle_preamble()
2985 	     desc->fd_lens[1], desc->fd_lens[2], desc->fd_lens[3]);  in handle_preamble()
2990 	if (desc->fd_lens[0] > CEPH_PREAMBLE_INLINE_LEN)  in handle_preamble()