2 * Copyright (c) 2012 The FreeBSD Foundation
5 * This software was developed by Edward Tomasz Napierala under sponsorship
6 * from the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/types.h>
43 #include "iscsi_proto.h"
45 #ifdef ICL_KERNEL_PROXY
46 #include <sys/ioctl.h>
50 pdu_ahs_length(const struct pdu *pdu)
53 return (pdu->pdu_bhs->bhs_total_ahs_len * 4);
57 pdu_data_segment_length(const struct pdu *pdu)
61 len += pdu->pdu_bhs->bhs_data_segment_len[0];
63 len += pdu->pdu_bhs->bhs_data_segment_len[1];
65 len += pdu->pdu_bhs->bhs_data_segment_len[2];
71 pdu_set_data_segment_length(struct pdu *pdu, uint32_t len)
74 pdu->pdu_bhs->bhs_data_segment_len[2] = len;
75 pdu->pdu_bhs->bhs_data_segment_len[1] = len >> 8;
76 pdu->pdu_bhs->bhs_data_segment_len[0] = len >> 16;
80 pdu_new(struct connection *conn)
84 pdu = calloc(1, sizeof(*pdu));
88 pdu->pdu_bhs = calloc(1, sizeof(*pdu->pdu_bhs));
89 if (pdu->pdu_bhs == NULL)
92 pdu->pdu_connection = conn;
98 pdu_new_response(struct pdu *request)
101 return (pdu_new(request->pdu_connection));
104 #ifdef ICL_KERNEL_PROXY
107 pdu_receive_proxy(struct pdu *pdu)
109 struct connection *conn;
110 struct iscsi_daemon_receive *idr;
114 conn = pdu->pdu_connection;
115 assert(conn->conn_conf.isc_iser != 0);
117 pdu->pdu_data = malloc(conn->conn_max_recv_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 = conn->conn_session_id;
126 idr->idr_bhs = pdu->pdu_bhs;
127 idr->idr_data_segment_len = conn->conn_max_recv_data_segment_length;
128 idr->idr_data_segment = pdu->pdu_data;
130 error = ioctl(conn->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 <= (size_t)conn->conn_max_recv_data_segment_length);
140 pdu->pdu_data_len = len;
146 pdu_send_proxy(struct pdu *pdu)
148 struct connection *conn;
149 struct iscsi_daemon_send *ids;
152 conn = pdu->pdu_connection;
153 assert(conn->conn_conf.isc_iser != 0);
155 pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
157 ids = calloc(1, sizeof(*ids));
159 log_err(1, "calloc");
161 ids->ids_session_id = conn->conn_session_id;
162 ids->ids_bhs = pdu->pdu_bhs;
163 ids->ids_data_segment_len = pdu->pdu_data_len;
164 ids->ids_data_segment = pdu->pdu_data;
166 error = ioctl(conn->conn_iscsi_fd, ISCSIDSEND, ids);
168 log_err(1, "ISCSIDSEND");
173 #endif /* ICL_KERNEL_PROXY */
176 pdu_padding(const struct pdu *pdu)
179 if ((pdu->pdu_data_len % 4) != 0)
180 return (4 - (pdu->pdu_data_len % 4));
186 pdu_read(const struct connection *conn, char *data, size_t len)
191 ret = read(conn->conn_socket, data, len);
194 fail(conn, "Login Phase timeout");
195 log_errx(1, "exiting due to timeout");
197 fail(conn, strerror(errno));
199 } else if (ret == 0) {
200 fail(conn, "connection lost");
201 log_errx(1, "read: connection lost");
209 pdu_receive(struct pdu *pdu)
211 struct connection *conn;
215 conn = pdu->pdu_connection;
216 #ifdef ICL_KERNEL_PROXY
217 if (conn->conn_conf.isc_iser != 0)
218 return (pdu_receive_proxy(pdu));
220 assert(conn->conn_conf.isc_iser == 0);
222 pdu_read(conn, (char *)pdu->pdu_bhs, sizeof(*pdu->pdu_bhs));
224 len = pdu_ahs_length(pdu);
226 log_errx(1, "protocol error: non-empty AHS");
228 len = pdu_data_segment_length(pdu);
230 if (len > (size_t)conn->conn_max_recv_data_segment_length) {
231 log_errx(1, "protocol error: received PDU "
232 "with DataSegmentLength exceeding %d",
233 conn->conn_max_recv_data_segment_length);
236 pdu->pdu_data_len = len;
237 pdu->pdu_data = malloc(len);
238 if (pdu->pdu_data == NULL)
239 log_err(1, "malloc");
241 pdu_read(conn, (char *)pdu->pdu_data, pdu->pdu_data_len);
243 padding = pdu_padding(pdu);
245 assert(padding < sizeof(dummy));
246 pdu_read(conn, (char *)dummy, padding);
252 pdu_send(struct pdu *pdu)
254 struct connection *conn;
255 ssize_t ret, total_len;
261 conn = pdu->pdu_connection;
262 #ifdef ICL_KERNEL_PROXY
263 if (conn->conn_conf.isc_iser != 0)
264 return (pdu_send_proxy(pdu));
267 assert(conn->conn_conf.isc_iser == 0);
269 pdu_set_data_segment_length(pdu, pdu->pdu_data_len);
270 iov[0].iov_base = pdu->pdu_bhs;
271 iov[0].iov_len = sizeof(*pdu->pdu_bhs);
272 total_len = iov[0].iov_len;
275 if (pdu->pdu_data_len > 0) {
276 iov[1].iov_base = pdu->pdu_data;
277 iov[1].iov_len = pdu->pdu_data_len;
278 total_len += iov[1].iov_len;
281 padding = pdu_padding(pdu);
283 assert(padding < sizeof(zero));
284 iov[2].iov_base = &zero;
285 iov[2].iov_len = padding;
286 total_len += iov[2].iov_len;
291 ret = writev(conn->conn_socket, iov, iovcnt);
294 log_errx(1, "exiting due to timeout");
295 log_err(1, "writev");
297 if (ret != total_len)
298 log_errx(1, "short write");
302 pdu_delete(struct pdu *pdu)