Commit | Line | Data |
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7ba24713 AA |
1 | /* |
2 | * iSCSI Initiator over TCP/IP Data-Path | |
3 | * | |
4 | * Copyright (C) 2004 Dmitry Yusupov | |
5 | * Copyright (C) 2004 Alex Aizman | |
5bb0b55a MC |
6 | * Copyright (C) 2005 - 2006 Mike Christie |
7 | * Copyright (C) 2006 Red Hat, Inc. All rights reserved. | |
7ba24713 AA |
8 | * maintained by open-iscsi@googlegroups.com |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published | |
12 | * by the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * See the file COPYING included with this distribution for more details. | |
21 | * | |
22 | * Credits: | |
23 | * Christoph Hellwig | |
24 | * FUJITA Tomonori | |
25 | * Arne Redlich | |
26 | * Zhenyu Wang | |
27 | */ | |
28 | ||
29 | #include <linux/types.h> | |
7ba24713 | 30 | #include <linux/inet.h> |
4e7aba73 | 31 | #include <linux/file.h> |
7ba24713 AA |
32 | #include <linux/blkdev.h> |
33 | #include <linux/crypto.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/kfifo.h> | |
36 | #include <linux/scatterlist.h> | |
37 | #include <net/tcp.h> | |
38 | #include <scsi/scsi_cmnd.h> | |
d1d81c01 | 39 | #include <scsi/scsi_device.h> |
7ba24713 AA |
40 | #include <scsi/scsi_host.h> |
41 | #include <scsi/scsi.h> | |
42 | #include <scsi/scsi_transport_iscsi.h> | |
43 | ||
44 | #include "iscsi_tcp.h" | |
45 | ||
38e1a8f5 MC |
46 | MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, " |
47 | "Dmitry Yusupov <dmitry_yus@yahoo.com>, " | |
7ba24713 AA |
48 | "Alex Aizman <itn780@yahoo.com>"); |
49 | MODULE_DESCRIPTION("iSCSI/TCP data-path"); | |
50 | MODULE_LICENSE("GPL"); | |
da32dd68 | 51 | #undef DEBUG_TCP |
7ba24713 AA |
52 | |
53 | #ifdef DEBUG_TCP | |
5bb0b55a | 54 | #define debug_tcp(fmt...) printk(KERN_INFO "tcp: " fmt) |
7ba24713 AA |
55 | #else |
56 | #define debug_tcp(fmt...) | |
57 | #endif | |
58 | ||
38e1a8f5 MC |
59 | static struct scsi_transport_template *iscsi_sw_tcp_scsi_transport; |
60 | static struct scsi_host_template iscsi_sw_tcp_sht; | |
61 | static struct iscsi_transport iscsi_sw_tcp_transport; | |
75613521 | 62 | |
7ba24713 AA |
63 | static unsigned int iscsi_max_lun = 512; |
64 | module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); | |
65 | ||
da32dd68 | 66 | /** |
38e1a8f5 | 67 | * iscsi_sw_tcp_recv - TCP receive in sendfile fashion |
63c62f1c MC |
68 | * @rd_desc: read descriptor |
69 | * @skb: socket buffer | |
70 | * @offset: offset in skb | |
71 | * @len: skb->len - offset | |
38e1a8f5 MC |
72 | */ |
73 | static int iscsi_sw_tcp_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, | |
74 | unsigned int offset, size_t len) | |
63c62f1c MC |
75 | { |
76 | struct iscsi_conn *conn = rd_desc->arg.data; | |
77 | unsigned int consumed, total_consumed = 0; | |
78 | int status; | |
79 | ||
80 | debug_tcp("in %d bytes\n", skb->len - offset); | |
81 | ||
82 | do { | |
83 | status = 0; | |
84 | consumed = iscsi_tcp_recv_skb(conn, skb, offset, 0, &status); | |
85 | offset += consumed; | |
86 | total_consumed += consumed; | |
87 | } while (consumed != 0 && status != ISCSI_TCP_SKB_DONE); | |
88 | ||
89 | debug_tcp("read %d bytes status %d\n", skb->len - offset, status); | |
90 | return total_consumed; | |
7ba24713 AA |
91 | } |
92 | ||
38e1a8f5 | 93 | static void iscsi_sw_tcp_data_ready(struct sock *sk, int flag) |
7ba24713 AA |
94 | { |
95 | struct iscsi_conn *conn = sk->sk_user_data; | |
da32dd68 | 96 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
7ba24713 AA |
97 | read_descriptor_t rd_desc; |
98 | ||
99 | read_lock(&sk->sk_callback_lock); | |
100 | ||
665b44ae | 101 | /* |
da32dd68 | 102 | * Use rd_desc to pass 'conn' to iscsi_tcp_recv. |
665b44ae | 103 | * We set count to 1 because we want the network layer to |
da32dd68 | 104 | * hand us all the skbs that are available. iscsi_tcp_recv |
665b44ae MC |
105 | * handled pdus that cross buffers or pdus that still need data. |
106 | */ | |
7ba24713 | 107 | rd_desc.arg.data = conn; |
665b44ae | 108 | rd_desc.count = 1; |
38e1a8f5 | 109 | tcp_read_sock(sk, &rd_desc, iscsi_sw_tcp_recv); |
7ba24713 AA |
110 | |
111 | read_unlock(&sk->sk_callback_lock); | |
da32dd68 OK |
112 | |
113 | /* If we had to (atomically) map a highmem page, | |
114 | * unmap it now. */ | |
a8ac6311 | 115 | iscsi_tcp_segment_unmap(&tcp_conn->in.segment); |
7ba24713 AA |
116 | } |
117 | ||
38e1a8f5 | 118 | static void iscsi_sw_tcp_state_change(struct sock *sk) |
7ba24713 | 119 | { |
5bb0b55a | 120 | struct iscsi_tcp_conn *tcp_conn; |
38e1a8f5 | 121 | struct iscsi_sw_tcp_conn *tcp_sw_conn; |
7ba24713 AA |
122 | struct iscsi_conn *conn; |
123 | struct iscsi_session *session; | |
124 | void (*old_state_change)(struct sock *); | |
125 | ||
126 | read_lock(&sk->sk_callback_lock); | |
127 | ||
128 | conn = (struct iscsi_conn*)sk->sk_user_data; | |
129 | session = conn->session; | |
130 | ||
e6273993 MC |
131 | if ((sk->sk_state == TCP_CLOSE_WAIT || |
132 | sk->sk_state == TCP_CLOSE) && | |
133 | !atomic_read(&sk->sk_rmem_alloc)) { | |
7ba24713 AA |
134 | debug_tcp("iscsi_tcp_state_change: TCP_CLOSE|TCP_CLOSE_WAIT\n"); |
135 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); | |
136 | } | |
137 | ||
5bb0b55a | 138 | tcp_conn = conn->dd_data; |
38e1a8f5 MC |
139 | tcp_sw_conn = tcp_conn->dd_data; |
140 | old_state_change = tcp_sw_conn->old_state_change; | |
7ba24713 AA |
141 | |
142 | read_unlock(&sk->sk_callback_lock); | |
143 | ||
144 | old_state_change(sk); | |
145 | } | |
146 | ||
147 | /** | |
148 | * iscsi_write_space - Called when more output buffer space is available | |
149 | * @sk: socket space is available for | |
150 | **/ | |
38e1a8f5 | 151 | static void iscsi_sw_tcp_write_space(struct sock *sk) |
7ba24713 AA |
152 | { |
153 | struct iscsi_conn *conn = (struct iscsi_conn*)sk->sk_user_data; | |
5bb0b55a | 154 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 155 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
5bb0b55a | 156 | |
38e1a8f5 | 157 | tcp_sw_conn->old_write_space(sk); |
7ba24713 | 158 | debug_tcp("iscsi_write_space: cid %d\n", conn->id); |
55e3299d | 159 | scsi_queue_work(conn->session->host, &conn->xmitwork); |
7ba24713 AA |
160 | } |
161 | ||
38e1a8f5 | 162 | static void iscsi_sw_tcp_conn_set_callbacks(struct iscsi_conn *conn) |
7ba24713 | 163 | { |
5bb0b55a | 164 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
165 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
166 | struct sock *sk = tcp_sw_conn->sock->sk; | |
7ba24713 AA |
167 | |
168 | /* assign new callbacks */ | |
169 | write_lock_bh(&sk->sk_callback_lock); | |
170 | sk->sk_user_data = conn; | |
38e1a8f5 MC |
171 | tcp_sw_conn->old_data_ready = sk->sk_data_ready; |
172 | tcp_sw_conn->old_state_change = sk->sk_state_change; | |
173 | tcp_sw_conn->old_write_space = sk->sk_write_space; | |
174 | sk->sk_data_ready = iscsi_sw_tcp_data_ready; | |
175 | sk->sk_state_change = iscsi_sw_tcp_state_change; | |
176 | sk->sk_write_space = iscsi_sw_tcp_write_space; | |
7ba24713 AA |
177 | write_unlock_bh(&sk->sk_callback_lock); |
178 | } | |
179 | ||
38e1a8f5 MC |
180 | static void |
181 | iscsi_sw_tcp_conn_restore_callbacks(struct iscsi_sw_tcp_conn *tcp_sw_conn) | |
7ba24713 | 182 | { |
38e1a8f5 | 183 | struct sock *sk = tcp_sw_conn->sock->sk; |
7ba24713 AA |
184 | |
185 | /* restore socket callbacks, see also: iscsi_conn_set_callbacks() */ | |
186 | write_lock_bh(&sk->sk_callback_lock); | |
187 | sk->sk_user_data = NULL; | |
38e1a8f5 MC |
188 | sk->sk_data_ready = tcp_sw_conn->old_data_ready; |
189 | sk->sk_state_change = tcp_sw_conn->old_state_change; | |
190 | sk->sk_write_space = tcp_sw_conn->old_write_space; | |
7ba24713 AA |
191 | sk->sk_no_check = 0; |
192 | write_unlock_bh(&sk->sk_callback_lock); | |
193 | } | |
194 | ||
195 | /** | |
38e1a8f5 MC |
196 | * iscsi_sw_tcp_xmit_segment - transmit segment |
197 | * @tcp_sw_conn: the iSCSI TCP connection | |
198 | * @segment: the buffer to transmnit | |
199 | * | |
200 | * This function transmits as much of the buffer as | |
201 | * the network layer will accept, and returns the number of | |
202 | * bytes transmitted. | |
203 | * | |
204 | * If CRC hashing is enabled, the function will compute the | |
205 | * hash as it goes. When the entire segment has been transmitted, | |
206 | * it will retrieve the hash value and send it as well. | |
207 | */ | |
208 | static int iscsi_sw_tcp_xmit_segment(struct iscsi_sw_tcp_conn *tcp_sw_conn, | |
209 | struct iscsi_segment *segment) | |
210 | { | |
211 | struct socket *sk = tcp_sw_conn->sock; | |
212 | unsigned int copied = 0; | |
213 | int r = 0; | |
214 | ||
215 | while (!iscsi_tcp_segment_done(segment, 0, r)) { | |
216 | struct scatterlist *sg; | |
217 | unsigned int offset, copy; | |
218 | int flags = 0; | |
219 | ||
220 | r = 0; | |
221 | offset = segment->copied; | |
222 | copy = segment->size - offset; | |
223 | ||
224 | if (segment->total_copied + segment->size < segment->total_size) | |
225 | flags |= MSG_MORE; | |
226 | ||
227 | /* Use sendpage if we can; else fall back to sendmsg */ | |
228 | if (!segment->data) { | |
229 | sg = segment->sg; | |
230 | offset += segment->sg_offset + sg->offset; | |
231 | r = tcp_sw_conn->sendpage(sk, sg_page(sg), offset, | |
232 | copy, flags); | |
233 | } else { | |
234 | struct msghdr msg = { .msg_flags = flags }; | |
235 | struct kvec iov = { | |
236 | .iov_base = segment->data + offset, | |
237 | .iov_len = copy | |
238 | }; | |
239 | ||
240 | r = kernel_sendmsg(sk, &msg, &iov, 1, copy); | |
241 | } | |
242 | ||
243 | if (r < 0) { | |
244 | iscsi_tcp_segment_unmap(segment); | |
245 | if (copied || r == -EAGAIN) | |
246 | break; | |
247 | return r; | |
248 | } | |
249 | copied += r; | |
250 | } | |
251 | return copied; | |
252 | } | |
253 | ||
254 | /** | |
255 | * iscsi_sw_tcp_xmit - TCP transmit | |
a8ac6311 | 256 | **/ |
38e1a8f5 | 257 | static int iscsi_sw_tcp_xmit(struct iscsi_conn *conn) |
7ba24713 | 258 | { |
5bb0b55a | 259 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
260 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
261 | struct iscsi_segment *segment = &tcp_sw_conn->out.segment; | |
a8ac6311 OK |
262 | unsigned int consumed = 0; |
263 | int rc = 0; | |
7ba24713 | 264 | |
a8ac6311 | 265 | while (1) { |
38e1a8f5 | 266 | rc = iscsi_sw_tcp_xmit_segment(tcp_sw_conn, segment); |
6f481e3c MC |
267 | if (rc < 0) { |
268 | rc = ISCSI_ERR_XMIT_FAILED; | |
a8ac6311 | 269 | goto error; |
6f481e3c | 270 | } |
a8ac6311 OK |
271 | if (rc == 0) |
272 | break; | |
273 | ||
274 | consumed += rc; | |
275 | ||
276 | if (segment->total_copied >= segment->total_size) { | |
277 | if (segment->done != NULL) { | |
278 | rc = segment->done(tcp_conn, segment); | |
6f481e3c | 279 | if (rc != 0) |
a8ac6311 OK |
280 | goto error; |
281 | } | |
282 | } | |
3219e529 MC |
283 | } |
284 | ||
a8ac6311 OK |
285 | debug_tcp("xmit %d bytes\n", consumed); |
286 | ||
287 | conn->txdata_octets += consumed; | |
288 | return consumed; | |
289 | ||
290 | error: | |
291 | /* Transmit error. We could initiate error recovery | |
292 | * here. */ | |
293 | debug_tcp("Error sending PDU, errno=%d\n", rc); | |
6f481e3c MC |
294 | iscsi_conn_failure(conn, rc); |
295 | return -EIO; | |
7ba24713 AA |
296 | } |
297 | ||
298 | /** | |
a8ac6311 OK |
299 | * iscsi_tcp_xmit_qlen - return the number of bytes queued for xmit |
300 | */ | |
38e1a8f5 | 301 | static inline int iscsi_sw_tcp_xmit_qlen(struct iscsi_conn *conn) |
7ba24713 | 302 | { |
a8ac6311 | 303 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
304 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
305 | struct iscsi_segment *segment = &tcp_sw_conn->out.segment; | |
7ba24713 | 306 | |
a8ac6311 | 307 | return segment->total_copied - segment->total_size; |
7ba24713 AA |
308 | } |
309 | ||
38e1a8f5 | 310 | static int iscsi_sw_tcp_pdu_xmit(struct iscsi_task *task) |
7ba24713 | 311 | { |
e5a7efef | 312 | struct iscsi_conn *conn = task->conn; |
a8ac6311 OK |
313 | int rc; |
314 | ||
38e1a8f5 MC |
315 | while (iscsi_sw_tcp_xmit_qlen(conn)) { |
316 | rc = iscsi_sw_tcp_xmit(conn); | |
a8ac6311 | 317 | if (rc == 0) |
7ba24713 | 318 | return -EAGAIN; |
a8ac6311 OK |
319 | if (rc < 0) |
320 | return rc; | |
3219e529 | 321 | } |
7ba24713 | 322 | |
a8ac6311 | 323 | return 0; |
7ba24713 AA |
324 | } |
325 | ||
a8ac6311 OK |
326 | /* |
327 | * This is called when we're done sending the header. | |
328 | * Simply copy the data_segment to the send segment, and return. | |
329 | */ | |
38e1a8f5 MC |
330 | static int iscsi_sw_tcp_send_hdr_done(struct iscsi_tcp_conn *tcp_conn, |
331 | struct iscsi_segment *segment) | |
7ba24713 | 332 | { |
38e1a8f5 MC |
333 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
334 | ||
335 | tcp_sw_conn->out.segment = tcp_sw_conn->out.data_segment; | |
a8ac6311 | 336 | debug_tcp("Header done. Next segment size %u total_size %u\n", |
38e1a8f5 MC |
337 | tcp_sw_conn->out.segment.size, |
338 | tcp_sw_conn->out.segment.total_size); | |
a8ac6311 OK |
339 | return 0; |
340 | } | |
341 | ||
38e1a8f5 MC |
342 | static void iscsi_sw_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, |
343 | size_t hdrlen) | |
a8ac6311 OK |
344 | { |
345 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 346 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
a8ac6311 | 347 | |
3a12b199 | 348 | debug_tcp("%s(%p%s)\n", __func__, tcp_conn, |
a8ac6311 OK |
349 | conn->hdrdgst_en? ", digest enabled" : ""); |
350 | ||
351 | /* Clear the data segment - needs to be filled in by the | |
352 | * caller using iscsi_tcp_send_data_prep() */ | |
38e1a8f5 MC |
353 | memset(&tcp_sw_conn->out.data_segment, 0, |
354 | sizeof(struct iscsi_segment)); | |
a8ac6311 OK |
355 | |
356 | /* If header digest is enabled, compute the CRC and | |
357 | * place the digest into the same buffer. We make | |
135a8ad4 | 358 | * sure that both iscsi_tcp_task and mtask have |
a8ac6311 OK |
359 | * sufficient room. |
360 | */ | |
361 | if (conn->hdrdgst_en) { | |
38e1a8f5 | 362 | iscsi_tcp_dgst_header(&tcp_sw_conn->tx_hash, hdr, hdrlen, |
a8ac6311 OK |
363 | hdr + hdrlen); |
364 | hdrlen += ISCSI_DIGEST_SIZE; | |
365 | } | |
366 | ||
367 | /* Remember header pointer for later, when we need | |
368 | * to decide whether there's a payload to go along | |
369 | * with the header. */ | |
38e1a8f5 | 370 | tcp_sw_conn->out.hdr = hdr; |
a8ac6311 | 371 | |
38e1a8f5 MC |
372 | iscsi_segment_init_linear(&tcp_sw_conn->out.segment, hdr, hdrlen, |
373 | iscsi_sw_tcp_send_hdr_done, NULL); | |
a8ac6311 OK |
374 | } |
375 | ||
376 | /* | |
377 | * Prepare the send buffer for the payload data. | |
378 | * Padding and checksumming will all be taken care | |
379 | * of by the iscsi_segment routines. | |
380 | */ | |
381 | static int | |
38e1a8f5 MC |
382 | iscsi_sw_tcp_send_data_prep(struct iscsi_conn *conn, struct scatterlist *sg, |
383 | unsigned int count, unsigned int offset, | |
384 | unsigned int len) | |
a8ac6311 OK |
385 | { |
386 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 387 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
a8ac6311 OK |
388 | struct hash_desc *tx_hash = NULL; |
389 | unsigned int hdr_spec_len; | |
390 | ||
3a12b199 | 391 | debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __func__, |
a8ac6311 OK |
392 | tcp_conn, offset, len, |
393 | conn->datadgst_en? ", digest enabled" : ""); | |
394 | ||
395 | /* Make sure the datalen matches what the caller | |
396 | said he would send. */ | |
38e1a8f5 | 397 | hdr_spec_len = ntoh24(tcp_sw_conn->out.hdr->dlength); |
a8ac6311 OK |
398 | WARN_ON(iscsi_padded(len) != iscsi_padded(hdr_spec_len)); |
399 | ||
400 | if (conn->datadgst_en) | |
38e1a8f5 | 401 | tx_hash = &tcp_sw_conn->tx_hash; |
a8ac6311 | 402 | |
38e1a8f5 MC |
403 | return iscsi_segment_seek_sg(&tcp_sw_conn->out.data_segment, |
404 | sg, count, offset, len, | |
405 | NULL, tx_hash); | |
a8ac6311 OK |
406 | } |
407 | ||
408 | static void | |
38e1a8f5 | 409 | iscsi_sw_tcp_send_linear_data_prep(struct iscsi_conn *conn, void *data, |
a8ac6311 OK |
410 | size_t len) |
411 | { | |
412 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 413 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
a8ac6311 OK |
414 | struct hash_desc *tx_hash = NULL; |
415 | unsigned int hdr_spec_len; | |
416 | ||
3a12b199 | 417 | debug_tcp("%s(%p, datalen=%d%s)\n", __func__, tcp_conn, len, |
a8ac6311 OK |
418 | conn->datadgst_en? ", digest enabled" : ""); |
419 | ||
420 | /* Make sure the datalen matches what the caller | |
421 | said he would send. */ | |
38e1a8f5 | 422 | hdr_spec_len = ntoh24(tcp_sw_conn->out.hdr->dlength); |
a8ac6311 OK |
423 | WARN_ON(iscsi_padded(len) != iscsi_padded(hdr_spec_len)); |
424 | ||
425 | if (conn->datadgst_en) | |
38e1a8f5 | 426 | tx_hash = &tcp_sw_conn->tx_hash; |
a8ac6311 | 427 | |
38e1a8f5 | 428 | iscsi_segment_init_linear(&tcp_sw_conn->out.data_segment, |
a8ac6311 | 429 | data, len, NULL, tx_hash); |
7ba24713 AA |
430 | } |
431 | ||
38e1a8f5 MC |
432 | static int iscsi_sw_tcp_pdu_init(struct iscsi_task *task, |
433 | unsigned int offset, unsigned int count) | |
e5a7efef MC |
434 | { |
435 | struct iscsi_conn *conn = task->conn; | |
436 | int err = 0; | |
437 | ||
38e1a8f5 | 438 | iscsi_sw_tcp_send_hdr_prep(conn, task->hdr, task->hdr_len); |
e5a7efef MC |
439 | |
440 | if (!count) | |
441 | return 0; | |
442 | ||
443 | if (!task->sc) | |
38e1a8f5 | 444 | iscsi_sw_tcp_send_linear_data_prep(conn, task->data, count); |
e5a7efef MC |
445 | else { |
446 | struct scsi_data_buffer *sdb = scsi_out(task->sc); | |
447 | ||
38e1a8f5 MC |
448 | err = iscsi_sw_tcp_send_data_prep(conn, sdb->table.sgl, |
449 | sdb->table.nents, offset, | |
450 | count); | |
e5a7efef MC |
451 | } |
452 | ||
453 | if (err) { | |
454 | iscsi_conn_failure(conn, err); | |
455 | return -EIO; | |
456 | } | |
457 | return 0; | |
458 | } | |
459 | ||
2ff79d52 | 460 | static int iscsi_sw_tcp_pdu_alloc(struct iscsi_task *task, uint8_t opcode) |
7ba24713 | 461 | { |
135a8ad4 | 462 | struct iscsi_tcp_task *tcp_task = task->dd_data; |
7ba24713 | 463 | |
38e1a8f5 MC |
464 | task->hdr = task->dd_data + sizeof(*tcp_task); |
465 | task->hdr_max = sizeof(struct iscsi_sw_tcp_hdrbuf) - ISCSI_DIGEST_SIZE; | |
a8ac6311 | 466 | return 0; |
7ba24713 AA |
467 | } |
468 | ||
5bb0b55a | 469 | static struct iscsi_cls_conn * |
38e1a8f5 MC |
470 | iscsi_sw_tcp_conn_create(struct iscsi_cls_session *cls_session, |
471 | uint32_t conn_idx) | |
7ba24713 | 472 | { |
5bb0b55a MC |
473 | struct iscsi_conn *conn; |
474 | struct iscsi_cls_conn *cls_conn; | |
475 | struct iscsi_tcp_conn *tcp_conn; | |
38e1a8f5 | 476 | struct iscsi_sw_tcp_conn *tcp_sw_conn; |
7ba24713 | 477 | |
38e1a8f5 MC |
478 | cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*tcp_sw_conn), |
479 | conn_idx); | |
5bb0b55a MC |
480 | if (!cls_conn) |
481 | return NULL; | |
482 | conn = cls_conn->dd_data; | |
5d91e209 | 483 | tcp_conn = conn->dd_data; |
38e1a8f5 | 484 | tcp_sw_conn = tcp_conn->dd_data; |
7ba24713 | 485 | |
38e1a8f5 MC |
486 | tcp_sw_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0, |
487 | CRYPTO_ALG_ASYNC); | |
488 | tcp_sw_conn->tx_hash.flags = 0; | |
489 | if (IS_ERR(tcp_sw_conn->tx_hash.tfm)) | |
5d91e209 | 490 | goto free_conn; |
dd8c0d95 | 491 | |
38e1a8f5 MC |
492 | tcp_sw_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0, |
493 | CRYPTO_ALG_ASYNC); | |
494 | tcp_sw_conn->rx_hash.flags = 0; | |
495 | if (IS_ERR(tcp_sw_conn->rx_hash.tfm)) | |
dd8c0d95 | 496 | goto free_tx_tfm; |
38e1a8f5 | 497 | tcp_conn->rx_hash = &tcp_sw_conn->rx_hash; |
dd8c0d95 | 498 | |
5bb0b55a | 499 | return cls_conn; |
7ba24713 | 500 | |
dd8c0d95 | 501 | free_tx_tfm: |
38e1a8f5 | 502 | crypto_free_hash(tcp_sw_conn->tx_hash.tfm); |
5d91e209 | 503 | free_conn: |
322d739d MC |
504 | iscsi_conn_printk(KERN_ERR, conn, |
505 | "Could not create connection due to crc32c " | |
506 | "loading error. Make sure the crc32c " | |
507 | "module is built as a module or into the " | |
508 | "kernel\n"); | |
38e1a8f5 | 509 | iscsi_tcp_conn_teardown(cls_conn); |
5bb0b55a | 510 | return NULL; |
7ba24713 AA |
511 | } |
512 | ||
38e1a8f5 | 513 | static void iscsi_sw_tcp_release_conn(struct iscsi_conn *conn) |
1c83469d | 514 | { |
22236961 | 515 | struct iscsi_session *session = conn->session; |
1c83469d | 516 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
517 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
518 | struct socket *sock = tcp_sw_conn->sock; | |
1c83469d | 519 | |
22236961 | 520 | if (!sock) |
1c83469d MC |
521 | return; |
522 | ||
22236961 | 523 | sock_hold(sock->sk); |
38e1a8f5 | 524 | iscsi_sw_tcp_conn_restore_callbacks(tcp_sw_conn); |
22236961 | 525 | sock_put(sock->sk); |
1c83469d | 526 | |
22236961 | 527 | spin_lock_bh(&session->lock); |
38e1a8f5 | 528 | tcp_sw_conn->sock = NULL; |
22236961 MC |
529 | spin_unlock_bh(&session->lock); |
530 | sockfd_put(sock); | |
1c83469d MC |
531 | } |
532 | ||
38e1a8f5 | 533 | static void iscsi_sw_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn) |
7ba24713 | 534 | { |
5bb0b55a MC |
535 | struct iscsi_conn *conn = cls_conn->dd_data; |
536 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 537 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
7ba24713 | 538 | |
38e1a8f5 | 539 | iscsi_sw_tcp_release_conn(conn); |
7ba24713 | 540 | |
38e1a8f5 MC |
541 | if (tcp_sw_conn->tx_hash.tfm) |
542 | crypto_free_hash(tcp_sw_conn->tx_hash.tfm); | |
543 | if (tcp_sw_conn->rx_hash.tfm) | |
544 | crypto_free_hash(tcp_sw_conn->rx_hash.tfm); | |
7ba24713 | 545 | |
38e1a8f5 | 546 | iscsi_tcp_conn_teardown(cls_conn); |
5bb0b55a | 547 | } |
7ba24713 | 548 | |
38e1a8f5 | 549 | static void iscsi_sw_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) |
1c83469d MC |
550 | { |
551 | struct iscsi_conn *conn = cls_conn->dd_data; | |
913e5bf4 | 552 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 553 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
913e5bf4 MC |
554 | |
555 | /* userspace may have goofed up and not bound us */ | |
38e1a8f5 | 556 | if (!tcp_sw_conn->sock) |
913e5bf4 MC |
557 | return; |
558 | /* | |
559 | * Make sure our recv side is stopped. | |
560 | * Older tools called conn stop before ep_disconnect | |
561 | * so IO could still be coming in. | |
562 | */ | |
38e1a8f5 | 563 | write_lock_bh(&tcp_sw_conn->sock->sk->sk_callback_lock); |
913e5bf4 | 564 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |
38e1a8f5 | 565 | write_unlock_bh(&tcp_sw_conn->sock->sk->sk_callback_lock); |
1c83469d MC |
566 | |
567 | iscsi_conn_stop(cls_conn, flag); | |
38e1a8f5 | 568 | iscsi_sw_tcp_release_conn(conn); |
1c83469d MC |
569 | } |
570 | ||
38e1a8f5 MC |
571 | static int iscsi_sw_tcp_get_addr(struct iscsi_conn *conn, struct socket *sock, |
572 | char *buf, int *port, | |
573 | int (*getname)(struct socket *, | |
574 | struct sockaddr *, | |
575 | int *addrlen)) | |
22236961 MC |
576 | { |
577 | struct sockaddr_storage *addr; | |
578 | struct sockaddr_in6 *sin6; | |
579 | struct sockaddr_in *sin; | |
580 | int rc = 0, len; | |
581 | ||
a9204879 | 582 | addr = kmalloc(sizeof(*addr), GFP_KERNEL); |
22236961 MC |
583 | if (!addr) |
584 | return -ENOMEM; | |
585 | ||
586 | if (getname(sock, (struct sockaddr *) addr, &len)) { | |
587 | rc = -ENODEV; | |
588 | goto free_addr; | |
589 | } | |
590 | ||
591 | switch (addr->ss_family) { | |
592 | case AF_INET: | |
593 | sin = (struct sockaddr_in *)addr; | |
594 | spin_lock_bh(&conn->session->lock); | |
63779436 | 595 | sprintf(buf, "%pI4", &sin->sin_addr.s_addr); |
22236961 MC |
596 | *port = be16_to_cpu(sin->sin_port); |
597 | spin_unlock_bh(&conn->session->lock); | |
598 | break; | |
599 | case AF_INET6: | |
600 | sin6 = (struct sockaddr_in6 *)addr; | |
601 | spin_lock_bh(&conn->session->lock); | |
5b095d98 | 602 | sprintf(buf, "%pI6", &sin6->sin6_addr); |
22236961 MC |
603 | *port = be16_to_cpu(sin6->sin6_port); |
604 | spin_unlock_bh(&conn->session->lock); | |
605 | break; | |
606 | } | |
607 | free_addr: | |
608 | kfree(addr); | |
609 | return rc; | |
610 | } | |
611 | ||
5bb0b55a | 612 | static int |
38e1a8f5 MC |
613 | iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session, |
614 | struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, | |
615 | int is_leading) | |
5bb0b55a | 616 | { |
75613521 MC |
617 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
618 | struct iscsi_host *ihost = shost_priv(shost); | |
5bb0b55a MC |
619 | struct iscsi_conn *conn = cls_conn->dd_data; |
620 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 621 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
5bb0b55a MC |
622 | struct sock *sk; |
623 | struct socket *sock; | |
624 | int err; | |
7ba24713 | 625 | |
5bb0b55a | 626 | /* lookup for existing socket */ |
264faaaa | 627 | sock = sockfd_lookup((int)transport_eph, &err); |
5bb0b55a | 628 | if (!sock) { |
322d739d MC |
629 | iscsi_conn_printk(KERN_ERR, conn, |
630 | "sockfd_lookup failed %d\n", err); | |
5bb0b55a | 631 | return -EEXIST; |
7ba24713 | 632 | } |
22236961 MC |
633 | /* |
634 | * copy these values now because if we drop the session | |
635 | * userspace may still want to query the values since we will | |
636 | * be using them for the reconnect | |
637 | */ | |
38e1a8f5 MC |
638 | err = iscsi_sw_tcp_get_addr(conn, sock, conn->portal_address, |
639 | &conn->portal_port, kernel_getpeername); | |
22236961 MC |
640 | if (err) |
641 | goto free_socket; | |
642 | ||
38e1a8f5 MC |
643 | err = iscsi_sw_tcp_get_addr(conn, sock, ihost->local_address, |
644 | &ihost->local_port, kernel_getsockname); | |
22236961 MC |
645 | if (err) |
646 | goto free_socket; | |
7ba24713 | 647 | |
5bb0b55a MC |
648 | err = iscsi_conn_bind(cls_session, cls_conn, is_leading); |
649 | if (err) | |
22236961 | 650 | goto free_socket; |
7ba24713 | 651 | |
67a61114 | 652 | /* bind iSCSI connection and socket */ |
38e1a8f5 | 653 | tcp_sw_conn->sock = sock; |
7ba24713 | 654 | |
67a61114 MC |
655 | /* setup Socket parameters */ |
656 | sk = sock->sk; | |
657 | sk->sk_reuse = 1; | |
658 | sk->sk_sndtimeo = 15 * HZ; /* FIXME: make it configurable */ | |
659 | sk->sk_allocation = GFP_ATOMIC; | |
7ba24713 | 660 | |
38e1a8f5 MC |
661 | iscsi_sw_tcp_conn_set_callbacks(conn); |
662 | tcp_sw_conn->sendpage = tcp_sw_conn->sock->ops->sendpage; | |
67a61114 MC |
663 | /* |
664 | * set receive state machine into initial state | |
665 | */ | |
da32dd68 | 666 | iscsi_tcp_hdr_recv_prep(tcp_conn); |
7ba24713 | 667 | return 0; |
22236961 MC |
668 | |
669 | free_socket: | |
670 | sockfd_put(sock); | |
671 | return err; | |
7ba24713 AA |
672 | } |
673 | ||
38e1a8f5 MC |
674 | static int iscsi_sw_tcp_conn_set_param(struct iscsi_cls_conn *cls_conn, |
675 | enum iscsi_param param, char *buf, | |
676 | int buflen) | |
7ba24713 | 677 | { |
7b7232f3 | 678 | struct iscsi_conn *conn = cls_conn->dd_data; |
7ba24713 | 679 | struct iscsi_session *session = conn->session; |
5bb0b55a | 680 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 681 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
5c75b7fc | 682 | int value; |
7ba24713 | 683 | |
7ba24713 | 684 | switch(param) { |
7ba24713 | 685 | case ISCSI_PARAM_HDRDGST_EN: |
5c75b7fc | 686 | iscsi_set_param(cls_conn, param, buf, buflen); |
7ba24713 AA |
687 | break; |
688 | case ISCSI_PARAM_DATADGST_EN: | |
5c75b7fc | 689 | iscsi_set_param(cls_conn, param, buf, buflen); |
38e1a8f5 MC |
690 | tcp_sw_conn->sendpage = conn->datadgst_en ? |
691 | sock_no_sendpage : tcp_sw_conn->sock->ops->sendpage; | |
7ba24713 | 692 | break; |
7ba24713 | 693 | case ISCSI_PARAM_MAX_R2T: |
5c75b7fc | 694 | sscanf(buf, "%d", &value); |
df93ffcd MC |
695 | if (value <= 0 || !is_power_of_2(value)) |
696 | return -EINVAL; | |
697 | if (session->max_r2t == value) | |
7ba24713 | 698 | break; |
38e1a8f5 | 699 | iscsi_tcp_r2tpool_free(session); |
5c75b7fc | 700 | iscsi_set_param(cls_conn, param, buf, buflen); |
38e1a8f5 | 701 | if (iscsi_tcp_r2tpool_alloc(session)) |
7ba24713 AA |
702 | return -ENOMEM; |
703 | break; | |
7ba24713 | 704 | default: |
5c75b7fc | 705 | return iscsi_set_param(cls_conn, param, buf, buflen); |
7ba24713 AA |
706 | } |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
38e1a8f5 MC |
711 | static int iscsi_sw_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn, |
712 | enum iscsi_param param, char *buf) | |
7b8631b5 | 713 | { |
7b7232f3 | 714 | struct iscsi_conn *conn = cls_conn->dd_data; |
5c75b7fc | 715 | int len; |
7b8631b5 MC |
716 | |
717 | switch(param) { | |
fd7255f5 | 718 | case ISCSI_PARAM_CONN_PORT: |
22236961 MC |
719 | spin_lock_bh(&conn->session->lock); |
720 | len = sprintf(buf, "%hu\n", conn->portal_port); | |
721 | spin_unlock_bh(&conn->session->lock); | |
8d2860b3 | 722 | break; |
fd7255f5 | 723 | case ISCSI_PARAM_CONN_ADDRESS: |
22236961 MC |
724 | spin_lock_bh(&conn->session->lock); |
725 | len = sprintf(buf, "%s\n", conn->portal_address); | |
726 | spin_unlock_bh(&conn->session->lock); | |
fd7255f5 MC |
727 | break; |
728 | default: | |
5c75b7fc | 729 | return iscsi_conn_get_param(cls_conn, param, buf); |
fd7255f5 MC |
730 | } |
731 | ||
732 | return len; | |
733 | } | |
734 | ||
7ba24713 | 735 | static void |
38e1a8f5 MC |
736 | iscsi_sw_tcp_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
737 | struct iscsi_stats *stats) | |
7ba24713 | 738 | { |
7b7232f3 | 739 | struct iscsi_conn *conn = cls_conn->dd_data; |
5bb0b55a | 740 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 741 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
7ba24713 | 742 | |
7ba24713 AA |
743 | stats->custom_length = 3; |
744 | strcpy(stats->custom[0].desc, "tx_sendpage_failures"); | |
38e1a8f5 | 745 | stats->custom[0].value = tcp_sw_conn->sendpage_failures_cnt; |
7ba24713 | 746 | strcpy(stats->custom[1].desc, "rx_discontiguous_hdr"); |
38e1a8f5 | 747 | stats->custom[1].value = tcp_sw_conn->discontiguous_hdr_cnt; |
7ba24713 AA |
748 | strcpy(stats->custom[2].desc, "eh_abort_cnt"); |
749 | stats->custom[2].value = conn->eh_abort_cnt; | |
38e1a8f5 MC |
750 | |
751 | iscsi_tcp_conn_get_stats(cls_conn, stats); | |
7ba24713 AA |
752 | } |
753 | ||
5bb0b55a | 754 | static struct iscsi_cls_session * |
38e1a8f5 MC |
755 | iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max, |
756 | uint16_t qdepth, uint32_t initial_cmdsn, | |
757 | uint32_t *hostno) | |
7ba24713 | 758 | { |
5bb0b55a MC |
759 | struct iscsi_cls_session *cls_session; |
760 | struct iscsi_session *session; | |
06520ede | 761 | struct Scsi_Host *shost; |
7ba24713 | 762 | |
06520ede MC |
763 | if (ep) { |
764 | printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep); | |
75613521 MC |
765 | return NULL; |
766 | } | |
767 | ||
38e1a8f5 | 768 | shost = iscsi_host_alloc(&iscsi_sw_tcp_sht, 0, qdepth); |
75613521 | 769 | if (!shost) |
5bb0b55a | 770 | return NULL; |
38e1a8f5 | 771 | shost->transportt = iscsi_sw_tcp_scsi_transport; |
75613521 MC |
772 | shost->max_lun = iscsi_max_lun; |
773 | shost->max_id = 0; | |
774 | shost->max_channel = 0; | |
30e9ba9f | 775 | shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE; |
75613521 | 776 | |
a4804cd6 | 777 | if (iscsi_host_add(shost, NULL)) |
75613521 MC |
778 | goto free_host; |
779 | *hostno = shost->host_no; | |
780 | ||
38e1a8f5 MC |
781 | cls_session = iscsi_session_setup(&iscsi_sw_tcp_transport, shost, |
782 | cmds_max, | |
783 | sizeof(struct iscsi_tcp_task) + | |
784 | sizeof(struct iscsi_sw_tcp_hdrbuf), | |
7970634b | 785 | initial_cmdsn, 0); |
75613521 MC |
786 | if (!cls_session) |
787 | goto remove_host; | |
788 | session = cls_session->dd_data; | |
7ba24713 | 789 | |
fbc514b4 | 790 | shost->can_queue = session->scsi_cmds_max; |
38e1a8f5 | 791 | if (iscsi_tcp_r2tpool_alloc(session)) |
75613521 | 792 | goto remove_session; |
5bb0b55a MC |
793 | return cls_session; |
794 | ||
75613521 | 795 | remove_session: |
5bb0b55a | 796 | iscsi_session_teardown(cls_session); |
75613521 | 797 | remove_host: |
a4804cd6 | 798 | iscsi_host_remove(shost); |
75613521 | 799 | free_host: |
a4804cd6 | 800 | iscsi_host_free(shost); |
5bb0b55a MC |
801 | return NULL; |
802 | } | |
803 | ||
38e1a8f5 | 804 | static void iscsi_sw_tcp_session_destroy(struct iscsi_cls_session *cls_session) |
5bb0b55a | 805 | { |
75613521 MC |
806 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
807 | ||
38e1a8f5 | 808 | iscsi_tcp_r2tpool_free(cls_session->dd_data); |
e5bd7b54 | 809 | iscsi_session_teardown(cls_session); |
75613521 | 810 | |
a4804cd6 MC |
811 | iscsi_host_remove(shost); |
812 | iscsi_host_free(shost); | |
7ba24713 AA |
813 | } |
814 | ||
38e1a8f5 | 815 | static int iscsi_sw_tcp_slave_configure(struct scsi_device *sdev) |
d1d81c01 | 816 | { |
b6d44fe9 | 817 | blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY); |
d1d81c01 MC |
818 | blk_queue_dma_alignment(sdev->request_queue, 0); |
819 | return 0; | |
820 | } | |
821 | ||
38e1a8f5 | 822 | static struct scsi_host_template iscsi_sw_tcp_sht = { |
7974392c | 823 | .module = THIS_MODULE, |
f4246b33 | 824 | .name = "iSCSI Initiator over TCP/IP", |
5bb0b55a MC |
825 | .queuecommand = iscsi_queuecommand, |
826 | .change_queue_depth = iscsi_change_queue_depth, | |
1548271e | 827 | .can_queue = ISCSI_DEF_XMIT_CMDS_MAX - 1, |
66bbe0ce | 828 | .sg_tablesize = 4096, |
8231f0ed | 829 | .max_sectors = 0xFFFF, |
5bb0b55a MC |
830 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, |
831 | .eh_abort_handler = iscsi_eh_abort, | |
843c0a8a | 832 | .eh_device_reset_handler= iscsi_eh_device_reset, |
8e124525 | 833 | .eh_target_reset_handler= iscsi_eh_target_reset, |
5bb0b55a | 834 | .use_clustering = DISABLE_CLUSTERING, |
38e1a8f5 | 835 | .slave_configure = iscsi_sw_tcp_slave_configure, |
5bb0b55a MC |
836 | .proc_name = "iscsi_tcp", |
837 | .this_id = -1, | |
838 | }; | |
839 | ||
38e1a8f5 | 840 | static struct iscsi_transport iscsi_sw_tcp_transport = { |
7ba24713 AA |
841 | .owner = THIS_MODULE, |
842 | .name = "tcp", | |
843 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | |
844 | | CAP_DATADGST, | |
fd7255f5 MC |
845 | .param_mask = ISCSI_MAX_RECV_DLENGTH | |
846 | ISCSI_MAX_XMIT_DLENGTH | | |
847 | ISCSI_HDRDGST_EN | | |
848 | ISCSI_DATADGST_EN | | |
849 | ISCSI_INITIAL_R2T_EN | | |
850 | ISCSI_MAX_R2T | | |
851 | ISCSI_IMM_DATA_EN | | |
852 | ISCSI_FIRST_BURST | | |
853 | ISCSI_MAX_BURST | | |
854 | ISCSI_PDU_INORDER_EN | | |
855 | ISCSI_DATASEQ_INORDER_EN | | |
856 | ISCSI_ERL | | |
857 | ISCSI_CONN_PORT | | |
8d2860b3 | 858 | ISCSI_CONN_ADDRESS | |
5c75b7fc MC |
859 | ISCSI_EXP_STATSN | |
860 | ISCSI_PERSISTENT_PORT | | |
861 | ISCSI_PERSISTENT_ADDRESS | | |
b2c64167 MC |
862 | ISCSI_TARGET_NAME | ISCSI_TPGT | |
863 | ISCSI_USERNAME | ISCSI_PASSWORD | | |
843c0a8a | 864 | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | |
f6d5180c MC |
865 | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | |
866 | ISCSI_LU_RESET_TMO | | |
88dfd340 MC |
867 | ISCSI_PING_TMO | ISCSI_RECV_TMO | |
868 | ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, | |
22236961 | 869 | .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | |
d8196ed2 MC |
870 | ISCSI_HOST_INITIATOR_NAME | |
871 | ISCSI_HOST_NETDEV_NAME, | |
5bb0b55a | 872 | /* session management */ |
38e1a8f5 MC |
873 | .create_session = iscsi_sw_tcp_session_create, |
874 | .destroy_session = iscsi_sw_tcp_session_destroy, | |
5bb0b55a | 875 | /* connection management */ |
38e1a8f5 MC |
876 | .create_conn = iscsi_sw_tcp_conn_create, |
877 | .bind_conn = iscsi_sw_tcp_conn_bind, | |
878 | .destroy_conn = iscsi_sw_tcp_conn_destroy, | |
879 | .set_param = iscsi_sw_tcp_conn_set_param, | |
880 | .get_conn_param = iscsi_sw_tcp_conn_get_param, | |
7b8631b5 | 881 | .get_session_param = iscsi_session_get_param, |
7ba24713 | 882 | .start_conn = iscsi_conn_start, |
38e1a8f5 | 883 | .stop_conn = iscsi_sw_tcp_conn_stop, |
0801c242 | 884 | /* iscsi host params */ |
75613521 | 885 | .get_host_param = iscsi_host_get_param, |
0801c242 | 886 | .set_host_param = iscsi_host_set_param, |
5bb0b55a | 887 | /* IO */ |
7ba24713 | 888 | .send_pdu = iscsi_conn_send_pdu, |
38e1a8f5 | 889 | .get_stats = iscsi_sw_tcp_conn_get_stats, |
e5a7efef | 890 | /* iscsi task/cmd helpers */ |
fbc514b4 MC |
891 | .init_task = iscsi_tcp_task_init, |
892 | .xmit_task = iscsi_tcp_task_xmit, | |
893 | .cleanup_task = iscsi_tcp_cleanup_task, | |
e5a7efef | 894 | /* low level pdu helpers */ |
38e1a8f5 MC |
895 | .xmit_pdu = iscsi_sw_tcp_pdu_xmit, |
896 | .init_pdu = iscsi_sw_tcp_pdu_init, | |
897 | .alloc_pdu = iscsi_sw_tcp_pdu_alloc, | |
5bb0b55a | 898 | /* recovery */ |
30a6c652 | 899 | .session_recovery_timedout = iscsi_session_recovery_timedout, |
7ba24713 AA |
900 | }; |
901 | ||
38e1a8f5 | 902 | static int __init iscsi_sw_tcp_init(void) |
7ba24713 | 903 | { |
7ba24713 | 904 | if (iscsi_max_lun < 1) { |
be2df72e OG |
905 | printk(KERN_ERR "iscsi_tcp: Invalid max_lun value of %u\n", |
906 | iscsi_max_lun); | |
7ba24713 AA |
907 | return -EINVAL; |
908 | } | |
7ba24713 | 909 | |
38e1a8f5 MC |
910 | iscsi_sw_tcp_scsi_transport = iscsi_register_transport( |
911 | &iscsi_sw_tcp_transport); | |
912 | if (!iscsi_sw_tcp_scsi_transport) | |
ffbfe925 | 913 | return -ENODEV; |
7ba24713 | 914 | |
7b8631b5 | 915 | return 0; |
7ba24713 AA |
916 | } |
917 | ||
38e1a8f5 | 918 | static void __exit iscsi_sw_tcp_exit(void) |
7ba24713 | 919 | { |
38e1a8f5 | 920 | iscsi_unregister_transport(&iscsi_sw_tcp_transport); |
7ba24713 AA |
921 | } |
922 | ||
38e1a8f5 MC |
923 | module_init(iscsi_sw_tcp_init); |
924 | module_exit(iscsi_sw_tcp_exit); |