2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 The FreeBSD Foundation
7 * This software was developed by Edward Tomasz Napierala under sponsorship
8 * from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/types.h>
45 #include "iscsi_proto.h"
47 #ifdef ICL_KERNEL_PROXY
48 #include <sys/ioctl.h>
52 pdu_ahs_length(const struct pdu *pdu)
55 return (pdu->pdu_bhs->bhs_total_ahs_len * 4);
59 pdu_data_segment_length(const struct pdu *pdu)
63 len += pdu->pdu_bhs->bhs_data_segment_len[0];
65 len += pdu->pdu_bhs->bhs_data_segment_len[1];
67 len += pdu->pdu_bhs->bhs_data_segment_len[2];
73 pdu_set_data_segment_length(struct pdu *pdu, uint32_t len)
76 pdu->pdu_bhs->bhs_data_segment_len[2] = len;
77 pdu->pdu_bhs->bhs_data_segment_len[1] = len >> 8;
78 pdu->pdu_bhs->bhs_data_segment_len[0] = len >> 16;
82 pdu_new(struct connection *conn)
86 pdu = calloc(1, sizeof(*pdu));
90 pdu->pdu_bhs = calloc(1, sizeof(*pdu->pdu_bhs));
91 if (pdu->pdu_bhs == NULL)
94 pdu->pdu_connection = conn;
100 pdu_new_response(struct pdu *request)
103 return (pdu_new(request->pdu_connection));
106 #ifdef ICL_KERNEL_PROXY
109 pdu_receive_proxy(struct pdu *pdu)
111 struct iscsi_daemon_receive *idr;
115 assert(pdu->pdu_connection->conn_conf.isc_iser != 0);
117 pdu->pdu_data = malloc(ISCSI_MAX_DATA_SEGMENT_LENGTH);
118 if (pdu->pdu_data == NULL)
119 log_err(1, "malloc");
121 idr = calloc(1, sizeof(*idr));
123 log_err(1, "calloc");
125 idr->idr_session_id = pdu->pdu_connection->conn_session_id;
126 idr->idr_bhs = pdu->pdu_bhs;
127 idr->idr_data_segment_len = ISCSI_MAX_DATA_SEGMENT_LENGTH;
128 idr->idr_data_segment = pdu->pdu_data;
130 error = ioctl(pdu->pdu_connection->conn_iscsi_fd, ISCSIDRECEIVE, idr);
132 log_err(1, "ISCSIDRECEIVE");
134 len = pdu_ahs_length(pdu);
136 log_errx(1, "protocol error: non-empty AHS");
138 len = pdu_data_segment_length(pdu);
139 assert(len <= ISCSI_MAX_DATA_SEGMENT_LENGTH);
140 pdu->pdu_data_len = len;
146 pdu_send_proxy(struct pdu *pdu)
148 struct iscsi_daemon_send *ids;
151 assert(pdu->pdu_connection->conn_conf.isc_iser != 0);
153 pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
155 ids = calloc(1, sizeof(*ids));
157 log_err(1, "calloc");
159 ids->ids_session_id = pdu->pdu_connection->conn_session_id;
160 ids->ids_bhs = pdu->pdu_bhs;
161 ids->ids_data_segment_len = pdu->pdu_data_len;
162 ids->ids_data_segment = pdu->pdu_data;
164 error = ioctl(pdu->pdu_connection->conn_iscsi_fd, ISCSIDSEND, ids);
166 log_err(1, "ISCSIDSEND");
171 #endif /* ICL_KERNEL_PROXY */
174 pdu_padding(const struct pdu *pdu)
177 if ((pdu->pdu_data_len % 4) != 0)
178 return (4 - (pdu->pdu_data_len % 4));
184 pdu_read(const struct connection *conn, char *data, size_t len)
189 ret = read(conn->conn_socket, data, len);
192 fail(conn, "Login Phase timeout");
193 log_errx(1, "exiting due to timeout");
195 fail(conn, strerror(errno));
197 } else if (ret == 0) {
198 fail(conn, "connection lost");
199 log_errx(1, "read: connection lost");
207 pdu_receive(struct pdu *pdu)
212 #ifdef ICL_KERNEL_PROXY
213 if (pdu->pdu_connection->conn_conf.isc_iser != 0)
214 return (pdu_receive_proxy(pdu));
217 assert(pdu->pdu_connection->conn_conf.isc_iser == 0);
219 pdu_read(pdu->pdu_connection,
220 (char *)pdu->pdu_bhs, sizeof(*pdu->pdu_bhs));
222 len = pdu_ahs_length(pdu);
224 log_errx(1, "protocol error: non-empty AHS");
226 len = pdu_data_segment_length(pdu);
228 if (len > ISCSI_MAX_DATA_SEGMENT_LENGTH) {
229 log_errx(1, "protocol error: received PDU "
230 "with DataSegmentLength exceeding %d",
231 ISCSI_MAX_DATA_SEGMENT_LENGTH);
234 pdu->pdu_data_len = len;
235 pdu->pdu_data = malloc(len);
236 if (pdu->pdu_data == NULL)
237 log_err(1, "malloc");
239 pdu_read(pdu->pdu_connection,
240 (char *)pdu->pdu_data, pdu->pdu_data_len);
242 padding = pdu_padding(pdu);
244 assert(padding < sizeof(dummy));
245 pdu_read(pdu->pdu_connection,
246 (char *)dummy, padding);
252 pdu_send(struct pdu *pdu)
254 ssize_t ret, total_len;
260 #ifdef ICL_KERNEL_PROXY
261 if (pdu->pdu_connection->conn_conf.isc_iser != 0)
262 return (pdu_send_proxy(pdu));
265 assert(pdu->pdu_connection->conn_conf.isc_iser == 0);
267 pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
268 iov[0].iov_base = pdu->pdu_bhs;
269 iov[0].iov_len = sizeof(*pdu->pdu_bhs);
270 total_len = iov[0].iov_len;
273 if (pdu->pdu_data_len > 0) {
274 iov[1].iov_base = pdu->pdu_data;
275 iov[1].iov_len = pdu->pdu_data_len;
276 total_len += iov[1].iov_len;
279 padding = pdu_padding(pdu);
281 assert(padding < sizeof(zero));
282 iov[2].iov_base = &zero;
283 iov[2].iov_len = padding;
284 total_len += iov[2].iov_len;
289 ret = writev(pdu->pdu_connection->conn_socket, iov, iovcnt);
292 log_errx(1, "exiting due to timeout");
293 log_err(1, "writev");
295 if (ret != total_len)
296 log_errx(1, "short write");
300 pdu_delete(struct pdu *pdu)