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 | 196 | * iscsi_sw_tcp_xmit_segment - transmit segment |
6df19a79 | 197 | * @tcp_conn: the iSCSI TCP connection |
38e1a8f5 MC |
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 | */ | |
6df19a79 | 208 | static int iscsi_sw_tcp_xmit_segment(struct iscsi_tcp_conn *tcp_conn, |
38e1a8f5 MC |
209 | struct iscsi_segment *segment) |
210 | { | |
6df19a79 | 211 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
38e1a8f5 MC |
212 | struct socket *sk = tcp_sw_conn->sock; |
213 | unsigned int copied = 0; | |
214 | int r = 0; | |
215 | ||
6df19a79 | 216 | while (!iscsi_tcp_segment_done(tcp_conn, segment, 0, r)) { |
38e1a8f5 MC |
217 | struct scatterlist *sg; |
218 | unsigned int offset, copy; | |
219 | int flags = 0; | |
220 | ||
221 | r = 0; | |
222 | offset = segment->copied; | |
223 | copy = segment->size - offset; | |
224 | ||
225 | if (segment->total_copied + segment->size < segment->total_size) | |
226 | flags |= MSG_MORE; | |
227 | ||
228 | /* Use sendpage if we can; else fall back to sendmsg */ | |
229 | if (!segment->data) { | |
230 | sg = segment->sg; | |
231 | offset += segment->sg_offset + sg->offset; | |
232 | r = tcp_sw_conn->sendpage(sk, sg_page(sg), offset, | |
233 | copy, flags); | |
234 | } else { | |
235 | struct msghdr msg = { .msg_flags = flags }; | |
236 | struct kvec iov = { | |
237 | .iov_base = segment->data + offset, | |
238 | .iov_len = copy | |
239 | }; | |
240 | ||
241 | r = kernel_sendmsg(sk, &msg, &iov, 1, copy); | |
242 | } | |
243 | ||
244 | if (r < 0) { | |
245 | iscsi_tcp_segment_unmap(segment); | |
246 | if (copied || r == -EAGAIN) | |
247 | break; | |
248 | return r; | |
249 | } | |
250 | copied += r; | |
251 | } | |
252 | return copied; | |
253 | } | |
254 | ||
255 | /** | |
256 | * iscsi_sw_tcp_xmit - TCP transmit | |
a8ac6311 | 257 | **/ |
38e1a8f5 | 258 | static int iscsi_sw_tcp_xmit(struct iscsi_conn *conn) |
7ba24713 | 259 | { |
5bb0b55a | 260 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
261 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
262 | struct iscsi_segment *segment = &tcp_sw_conn->out.segment; | |
a8ac6311 OK |
263 | unsigned int consumed = 0; |
264 | int rc = 0; | |
7ba24713 | 265 | |
a8ac6311 | 266 | while (1) { |
6df19a79 | 267 | rc = iscsi_sw_tcp_xmit_segment(tcp_conn, segment); |
6f481e3c MC |
268 | if (rc < 0) { |
269 | rc = ISCSI_ERR_XMIT_FAILED; | |
a8ac6311 | 270 | goto error; |
6f481e3c | 271 | } |
a8ac6311 OK |
272 | if (rc == 0) |
273 | break; | |
274 | ||
275 | consumed += rc; | |
276 | ||
277 | if (segment->total_copied >= segment->total_size) { | |
278 | if (segment->done != NULL) { | |
279 | rc = segment->done(tcp_conn, segment); | |
6f481e3c | 280 | if (rc != 0) |
a8ac6311 OK |
281 | goto error; |
282 | } | |
283 | } | |
3219e529 MC |
284 | } |
285 | ||
a8ac6311 OK |
286 | debug_tcp("xmit %d bytes\n", consumed); |
287 | ||
288 | conn->txdata_octets += consumed; | |
289 | return consumed; | |
290 | ||
291 | error: | |
292 | /* Transmit error. We could initiate error recovery | |
293 | * here. */ | |
294 | debug_tcp("Error sending PDU, errno=%d\n", rc); | |
6f481e3c MC |
295 | iscsi_conn_failure(conn, rc); |
296 | return -EIO; | |
7ba24713 AA |
297 | } |
298 | ||
299 | /** | |
a8ac6311 OK |
300 | * iscsi_tcp_xmit_qlen - return the number of bytes queued for xmit |
301 | */ | |
38e1a8f5 | 302 | static inline int iscsi_sw_tcp_xmit_qlen(struct iscsi_conn *conn) |
7ba24713 | 303 | { |
a8ac6311 | 304 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
305 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
306 | struct iscsi_segment *segment = &tcp_sw_conn->out.segment; | |
7ba24713 | 307 | |
a8ac6311 | 308 | return segment->total_copied - segment->total_size; |
7ba24713 AA |
309 | } |
310 | ||
38e1a8f5 | 311 | static int iscsi_sw_tcp_pdu_xmit(struct iscsi_task *task) |
7ba24713 | 312 | { |
e5a7efef | 313 | struct iscsi_conn *conn = task->conn; |
a8ac6311 OK |
314 | int rc; |
315 | ||
38e1a8f5 MC |
316 | while (iscsi_sw_tcp_xmit_qlen(conn)) { |
317 | rc = iscsi_sw_tcp_xmit(conn); | |
a8ac6311 | 318 | if (rc == 0) |
7ba24713 | 319 | return -EAGAIN; |
a8ac6311 OK |
320 | if (rc < 0) |
321 | return rc; | |
3219e529 | 322 | } |
7ba24713 | 323 | |
a8ac6311 | 324 | return 0; |
7ba24713 AA |
325 | } |
326 | ||
a8ac6311 OK |
327 | /* |
328 | * This is called when we're done sending the header. | |
329 | * Simply copy the data_segment to the send segment, and return. | |
330 | */ | |
38e1a8f5 MC |
331 | static int iscsi_sw_tcp_send_hdr_done(struct iscsi_tcp_conn *tcp_conn, |
332 | struct iscsi_segment *segment) | |
7ba24713 | 333 | { |
38e1a8f5 MC |
334 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
335 | ||
336 | tcp_sw_conn->out.segment = tcp_sw_conn->out.data_segment; | |
a8ac6311 | 337 | debug_tcp("Header done. Next segment size %u total_size %u\n", |
38e1a8f5 MC |
338 | tcp_sw_conn->out.segment.size, |
339 | tcp_sw_conn->out.segment.total_size); | |
a8ac6311 OK |
340 | return 0; |
341 | } | |
342 | ||
38e1a8f5 MC |
343 | static void iscsi_sw_tcp_send_hdr_prep(struct iscsi_conn *conn, void *hdr, |
344 | size_t hdrlen) | |
a8ac6311 OK |
345 | { |
346 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 347 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
a8ac6311 | 348 | |
3a12b199 | 349 | debug_tcp("%s(%p%s)\n", __func__, tcp_conn, |
a8ac6311 OK |
350 | conn->hdrdgst_en? ", digest enabled" : ""); |
351 | ||
352 | /* Clear the data segment - needs to be filled in by the | |
353 | * caller using iscsi_tcp_send_data_prep() */ | |
38e1a8f5 MC |
354 | memset(&tcp_sw_conn->out.data_segment, 0, |
355 | sizeof(struct iscsi_segment)); | |
a8ac6311 OK |
356 | |
357 | /* If header digest is enabled, compute the CRC and | |
358 | * place the digest into the same buffer. We make | |
135a8ad4 | 359 | * sure that both iscsi_tcp_task and mtask have |
a8ac6311 OK |
360 | * sufficient room. |
361 | */ | |
362 | if (conn->hdrdgst_en) { | |
38e1a8f5 | 363 | iscsi_tcp_dgst_header(&tcp_sw_conn->tx_hash, hdr, hdrlen, |
a8ac6311 OK |
364 | hdr + hdrlen); |
365 | hdrlen += ISCSI_DIGEST_SIZE; | |
366 | } | |
367 | ||
368 | /* Remember header pointer for later, when we need | |
369 | * to decide whether there's a payload to go along | |
370 | * with the header. */ | |
38e1a8f5 | 371 | tcp_sw_conn->out.hdr = hdr; |
a8ac6311 | 372 | |
38e1a8f5 MC |
373 | iscsi_segment_init_linear(&tcp_sw_conn->out.segment, hdr, hdrlen, |
374 | iscsi_sw_tcp_send_hdr_done, NULL); | |
a8ac6311 OK |
375 | } |
376 | ||
377 | /* | |
378 | * Prepare the send buffer for the payload data. | |
379 | * Padding and checksumming will all be taken care | |
380 | * of by the iscsi_segment routines. | |
381 | */ | |
382 | static int | |
38e1a8f5 MC |
383 | iscsi_sw_tcp_send_data_prep(struct iscsi_conn *conn, struct scatterlist *sg, |
384 | unsigned int count, unsigned int offset, | |
385 | unsigned int len) | |
a8ac6311 OK |
386 | { |
387 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 388 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
a8ac6311 OK |
389 | struct hash_desc *tx_hash = NULL; |
390 | unsigned int hdr_spec_len; | |
391 | ||
3a12b199 | 392 | debug_tcp("%s(%p, offset=%d, datalen=%d%s)\n", __func__, |
a8ac6311 OK |
393 | tcp_conn, offset, len, |
394 | conn->datadgst_en? ", digest enabled" : ""); | |
395 | ||
396 | /* Make sure the datalen matches what the caller | |
397 | said he would send. */ | |
38e1a8f5 | 398 | hdr_spec_len = ntoh24(tcp_sw_conn->out.hdr->dlength); |
a8ac6311 OK |
399 | WARN_ON(iscsi_padded(len) != iscsi_padded(hdr_spec_len)); |
400 | ||
401 | if (conn->datadgst_en) | |
38e1a8f5 | 402 | tx_hash = &tcp_sw_conn->tx_hash; |
a8ac6311 | 403 | |
38e1a8f5 MC |
404 | return iscsi_segment_seek_sg(&tcp_sw_conn->out.data_segment, |
405 | sg, count, offset, len, | |
406 | NULL, tx_hash); | |
a8ac6311 OK |
407 | } |
408 | ||
409 | static void | |
38e1a8f5 | 410 | iscsi_sw_tcp_send_linear_data_prep(struct iscsi_conn *conn, void *data, |
a8ac6311 OK |
411 | size_t len) |
412 | { | |
413 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 414 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
a8ac6311 OK |
415 | struct hash_desc *tx_hash = NULL; |
416 | unsigned int hdr_spec_len; | |
417 | ||
3a12b199 | 418 | debug_tcp("%s(%p, datalen=%d%s)\n", __func__, tcp_conn, len, |
a8ac6311 OK |
419 | conn->datadgst_en? ", digest enabled" : ""); |
420 | ||
421 | /* Make sure the datalen matches what the caller | |
422 | said he would send. */ | |
38e1a8f5 | 423 | hdr_spec_len = ntoh24(tcp_sw_conn->out.hdr->dlength); |
a8ac6311 OK |
424 | WARN_ON(iscsi_padded(len) != iscsi_padded(hdr_spec_len)); |
425 | ||
426 | if (conn->datadgst_en) | |
38e1a8f5 | 427 | tx_hash = &tcp_sw_conn->tx_hash; |
a8ac6311 | 428 | |
38e1a8f5 | 429 | iscsi_segment_init_linear(&tcp_sw_conn->out.data_segment, |
a8ac6311 | 430 | data, len, NULL, tx_hash); |
7ba24713 AA |
431 | } |
432 | ||
38e1a8f5 MC |
433 | static int iscsi_sw_tcp_pdu_init(struct iscsi_task *task, |
434 | unsigned int offset, unsigned int count) | |
e5a7efef MC |
435 | { |
436 | struct iscsi_conn *conn = task->conn; | |
437 | int err = 0; | |
438 | ||
38e1a8f5 | 439 | iscsi_sw_tcp_send_hdr_prep(conn, task->hdr, task->hdr_len); |
e5a7efef MC |
440 | |
441 | if (!count) | |
442 | return 0; | |
443 | ||
444 | if (!task->sc) | |
38e1a8f5 | 445 | iscsi_sw_tcp_send_linear_data_prep(conn, task->data, count); |
e5a7efef MC |
446 | else { |
447 | struct scsi_data_buffer *sdb = scsi_out(task->sc); | |
448 | ||
38e1a8f5 MC |
449 | err = iscsi_sw_tcp_send_data_prep(conn, sdb->table.sgl, |
450 | sdb->table.nents, offset, | |
451 | count); | |
e5a7efef MC |
452 | } |
453 | ||
454 | if (err) { | |
455 | iscsi_conn_failure(conn, err); | |
456 | return -EIO; | |
457 | } | |
458 | return 0; | |
459 | } | |
460 | ||
2ff79d52 | 461 | static int iscsi_sw_tcp_pdu_alloc(struct iscsi_task *task, uint8_t opcode) |
7ba24713 | 462 | { |
135a8ad4 | 463 | struct iscsi_tcp_task *tcp_task = task->dd_data; |
7ba24713 | 464 | |
38e1a8f5 MC |
465 | task->hdr = task->dd_data + sizeof(*tcp_task); |
466 | task->hdr_max = sizeof(struct iscsi_sw_tcp_hdrbuf) - ISCSI_DIGEST_SIZE; | |
a8ac6311 | 467 | return 0; |
7ba24713 AA |
468 | } |
469 | ||
5bb0b55a | 470 | static struct iscsi_cls_conn * |
38e1a8f5 MC |
471 | iscsi_sw_tcp_conn_create(struct iscsi_cls_session *cls_session, |
472 | uint32_t conn_idx) | |
7ba24713 | 473 | { |
5bb0b55a MC |
474 | struct iscsi_conn *conn; |
475 | struct iscsi_cls_conn *cls_conn; | |
476 | struct iscsi_tcp_conn *tcp_conn; | |
38e1a8f5 | 477 | struct iscsi_sw_tcp_conn *tcp_sw_conn; |
7ba24713 | 478 | |
38e1a8f5 MC |
479 | cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*tcp_sw_conn), |
480 | conn_idx); | |
5bb0b55a MC |
481 | if (!cls_conn) |
482 | return NULL; | |
483 | conn = cls_conn->dd_data; | |
5d91e209 | 484 | tcp_conn = conn->dd_data; |
38e1a8f5 | 485 | tcp_sw_conn = tcp_conn->dd_data; |
7ba24713 | 486 | |
38e1a8f5 MC |
487 | tcp_sw_conn->tx_hash.tfm = crypto_alloc_hash("crc32c", 0, |
488 | CRYPTO_ALG_ASYNC); | |
489 | tcp_sw_conn->tx_hash.flags = 0; | |
490 | if (IS_ERR(tcp_sw_conn->tx_hash.tfm)) | |
5d91e209 | 491 | goto free_conn; |
dd8c0d95 | 492 | |
38e1a8f5 MC |
493 | tcp_sw_conn->rx_hash.tfm = crypto_alloc_hash("crc32c", 0, |
494 | CRYPTO_ALG_ASYNC); | |
495 | tcp_sw_conn->rx_hash.flags = 0; | |
496 | if (IS_ERR(tcp_sw_conn->rx_hash.tfm)) | |
dd8c0d95 | 497 | goto free_tx_tfm; |
38e1a8f5 | 498 | tcp_conn->rx_hash = &tcp_sw_conn->rx_hash; |
dd8c0d95 | 499 | |
5bb0b55a | 500 | return cls_conn; |
7ba24713 | 501 | |
dd8c0d95 | 502 | free_tx_tfm: |
38e1a8f5 | 503 | crypto_free_hash(tcp_sw_conn->tx_hash.tfm); |
5d91e209 | 504 | free_conn: |
322d739d MC |
505 | iscsi_conn_printk(KERN_ERR, conn, |
506 | "Could not create connection due to crc32c " | |
507 | "loading error. Make sure the crc32c " | |
508 | "module is built as a module or into the " | |
509 | "kernel\n"); | |
38e1a8f5 | 510 | iscsi_tcp_conn_teardown(cls_conn); |
5bb0b55a | 511 | return NULL; |
7ba24713 AA |
512 | } |
513 | ||
38e1a8f5 | 514 | static void iscsi_sw_tcp_release_conn(struct iscsi_conn *conn) |
1c83469d | 515 | { |
22236961 | 516 | struct iscsi_session *session = conn->session; |
1c83469d | 517 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 MC |
518 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
519 | struct socket *sock = tcp_sw_conn->sock; | |
1c83469d | 520 | |
22236961 | 521 | if (!sock) |
1c83469d MC |
522 | return; |
523 | ||
22236961 | 524 | sock_hold(sock->sk); |
38e1a8f5 | 525 | iscsi_sw_tcp_conn_restore_callbacks(tcp_sw_conn); |
22236961 | 526 | sock_put(sock->sk); |
1c83469d | 527 | |
22236961 | 528 | spin_lock_bh(&session->lock); |
38e1a8f5 | 529 | tcp_sw_conn->sock = NULL; |
22236961 MC |
530 | spin_unlock_bh(&session->lock); |
531 | sockfd_put(sock); | |
1c83469d MC |
532 | } |
533 | ||
38e1a8f5 | 534 | static void iscsi_sw_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn) |
7ba24713 | 535 | { |
5bb0b55a MC |
536 | struct iscsi_conn *conn = cls_conn->dd_data; |
537 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 538 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
7ba24713 | 539 | |
38e1a8f5 | 540 | iscsi_sw_tcp_release_conn(conn); |
7ba24713 | 541 | |
38e1a8f5 MC |
542 | if (tcp_sw_conn->tx_hash.tfm) |
543 | crypto_free_hash(tcp_sw_conn->tx_hash.tfm); | |
544 | if (tcp_sw_conn->rx_hash.tfm) | |
545 | crypto_free_hash(tcp_sw_conn->rx_hash.tfm); | |
7ba24713 | 546 | |
38e1a8f5 | 547 | iscsi_tcp_conn_teardown(cls_conn); |
5bb0b55a | 548 | } |
7ba24713 | 549 | |
38e1a8f5 | 550 | static void iscsi_sw_tcp_conn_stop(struct iscsi_cls_conn *cls_conn, int flag) |
1c83469d MC |
551 | { |
552 | struct iscsi_conn *conn = cls_conn->dd_data; | |
913e5bf4 | 553 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 554 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
913e5bf4 MC |
555 | |
556 | /* userspace may have goofed up and not bound us */ | |
38e1a8f5 | 557 | if (!tcp_sw_conn->sock) |
913e5bf4 MC |
558 | return; |
559 | /* | |
560 | * Make sure our recv side is stopped. | |
561 | * Older tools called conn stop before ep_disconnect | |
562 | * so IO could still be coming in. | |
563 | */ | |
38e1a8f5 | 564 | write_lock_bh(&tcp_sw_conn->sock->sk->sk_callback_lock); |
913e5bf4 | 565 | set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |
38e1a8f5 | 566 | write_unlock_bh(&tcp_sw_conn->sock->sk->sk_callback_lock); |
1c83469d MC |
567 | |
568 | iscsi_conn_stop(cls_conn, flag); | |
38e1a8f5 | 569 | iscsi_sw_tcp_release_conn(conn); |
1c83469d MC |
570 | } |
571 | ||
38e1a8f5 MC |
572 | static int iscsi_sw_tcp_get_addr(struct iscsi_conn *conn, struct socket *sock, |
573 | char *buf, int *port, | |
574 | int (*getname)(struct socket *, | |
575 | struct sockaddr *, | |
576 | int *addrlen)) | |
22236961 MC |
577 | { |
578 | struct sockaddr_storage *addr; | |
579 | struct sockaddr_in6 *sin6; | |
580 | struct sockaddr_in *sin; | |
581 | int rc = 0, len; | |
582 | ||
a9204879 | 583 | addr = kmalloc(sizeof(*addr), GFP_KERNEL); |
22236961 MC |
584 | if (!addr) |
585 | return -ENOMEM; | |
586 | ||
587 | if (getname(sock, (struct sockaddr *) addr, &len)) { | |
588 | rc = -ENODEV; | |
589 | goto free_addr; | |
590 | } | |
591 | ||
592 | switch (addr->ss_family) { | |
593 | case AF_INET: | |
594 | sin = (struct sockaddr_in *)addr; | |
595 | spin_lock_bh(&conn->session->lock); | |
63779436 | 596 | sprintf(buf, "%pI4", &sin->sin_addr.s_addr); |
22236961 MC |
597 | *port = be16_to_cpu(sin->sin_port); |
598 | spin_unlock_bh(&conn->session->lock); | |
599 | break; | |
600 | case AF_INET6: | |
601 | sin6 = (struct sockaddr_in6 *)addr; | |
602 | spin_lock_bh(&conn->session->lock); | |
5b095d98 | 603 | sprintf(buf, "%pI6", &sin6->sin6_addr); |
22236961 MC |
604 | *port = be16_to_cpu(sin6->sin6_port); |
605 | spin_unlock_bh(&conn->session->lock); | |
606 | break; | |
607 | } | |
608 | free_addr: | |
609 | kfree(addr); | |
610 | return rc; | |
611 | } | |
612 | ||
5bb0b55a | 613 | static int |
38e1a8f5 MC |
614 | iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session, |
615 | struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, | |
616 | int is_leading) | |
5bb0b55a | 617 | { |
75613521 MC |
618 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
619 | struct iscsi_host *ihost = shost_priv(shost); | |
5bb0b55a MC |
620 | struct iscsi_conn *conn = cls_conn->dd_data; |
621 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; | |
38e1a8f5 | 622 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
5bb0b55a MC |
623 | struct sock *sk; |
624 | struct socket *sock; | |
625 | int err; | |
7ba24713 | 626 | |
5bb0b55a | 627 | /* lookup for existing socket */ |
264faaaa | 628 | sock = sockfd_lookup((int)transport_eph, &err); |
5bb0b55a | 629 | if (!sock) { |
322d739d MC |
630 | iscsi_conn_printk(KERN_ERR, conn, |
631 | "sockfd_lookup failed %d\n", err); | |
5bb0b55a | 632 | return -EEXIST; |
7ba24713 | 633 | } |
22236961 MC |
634 | /* |
635 | * copy these values now because if we drop the session | |
636 | * userspace may still want to query the values since we will | |
637 | * be using them for the reconnect | |
638 | */ | |
38e1a8f5 MC |
639 | err = iscsi_sw_tcp_get_addr(conn, sock, conn->portal_address, |
640 | &conn->portal_port, kernel_getpeername); | |
22236961 MC |
641 | if (err) |
642 | goto free_socket; | |
643 | ||
38e1a8f5 MC |
644 | err = iscsi_sw_tcp_get_addr(conn, sock, ihost->local_address, |
645 | &ihost->local_port, kernel_getsockname); | |
22236961 MC |
646 | if (err) |
647 | goto free_socket; | |
7ba24713 | 648 | |
5bb0b55a MC |
649 | err = iscsi_conn_bind(cls_session, cls_conn, is_leading); |
650 | if (err) | |
22236961 | 651 | goto free_socket; |
7ba24713 | 652 | |
67a61114 | 653 | /* bind iSCSI connection and socket */ |
38e1a8f5 | 654 | tcp_sw_conn->sock = sock; |
7ba24713 | 655 | |
67a61114 MC |
656 | /* setup Socket parameters */ |
657 | sk = sock->sk; | |
658 | sk->sk_reuse = 1; | |
659 | sk->sk_sndtimeo = 15 * HZ; /* FIXME: make it configurable */ | |
660 | sk->sk_allocation = GFP_ATOMIC; | |
7ba24713 | 661 | |
38e1a8f5 MC |
662 | iscsi_sw_tcp_conn_set_callbacks(conn); |
663 | tcp_sw_conn->sendpage = tcp_sw_conn->sock->ops->sendpage; | |
67a61114 MC |
664 | /* |
665 | * set receive state machine into initial state | |
666 | */ | |
da32dd68 | 667 | iscsi_tcp_hdr_recv_prep(tcp_conn); |
7ba24713 | 668 | return 0; |
22236961 MC |
669 | |
670 | free_socket: | |
671 | sockfd_put(sock); | |
672 | return err; | |
7ba24713 AA |
673 | } |
674 | ||
38e1a8f5 MC |
675 | static int iscsi_sw_tcp_conn_set_param(struct iscsi_cls_conn *cls_conn, |
676 | enum iscsi_param param, char *buf, | |
677 | int buflen) | |
7ba24713 | 678 | { |
7b7232f3 | 679 | struct iscsi_conn *conn = cls_conn->dd_data; |
7ba24713 | 680 | struct iscsi_session *session = conn->session; |
5bb0b55a | 681 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 682 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
5c75b7fc | 683 | int value; |
7ba24713 | 684 | |
7ba24713 | 685 | switch(param) { |
7ba24713 | 686 | case ISCSI_PARAM_HDRDGST_EN: |
5c75b7fc | 687 | iscsi_set_param(cls_conn, param, buf, buflen); |
7ba24713 AA |
688 | break; |
689 | case ISCSI_PARAM_DATADGST_EN: | |
5c75b7fc | 690 | iscsi_set_param(cls_conn, param, buf, buflen); |
38e1a8f5 MC |
691 | tcp_sw_conn->sendpage = conn->datadgst_en ? |
692 | sock_no_sendpage : tcp_sw_conn->sock->ops->sendpage; | |
7ba24713 | 693 | break; |
7ba24713 | 694 | case ISCSI_PARAM_MAX_R2T: |
5c75b7fc | 695 | sscanf(buf, "%d", &value); |
df93ffcd MC |
696 | if (value <= 0 || !is_power_of_2(value)) |
697 | return -EINVAL; | |
698 | if (session->max_r2t == value) | |
7ba24713 | 699 | break; |
38e1a8f5 | 700 | iscsi_tcp_r2tpool_free(session); |
5c75b7fc | 701 | iscsi_set_param(cls_conn, param, buf, buflen); |
38e1a8f5 | 702 | if (iscsi_tcp_r2tpool_alloc(session)) |
7ba24713 AA |
703 | return -ENOMEM; |
704 | break; | |
7ba24713 | 705 | default: |
5c75b7fc | 706 | return iscsi_set_param(cls_conn, param, buf, buflen); |
7ba24713 AA |
707 | } |
708 | ||
709 | return 0; | |
710 | } | |
711 | ||
38e1a8f5 MC |
712 | static int iscsi_sw_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn, |
713 | enum iscsi_param param, char *buf) | |
7b8631b5 | 714 | { |
7b7232f3 | 715 | struct iscsi_conn *conn = cls_conn->dd_data; |
5c75b7fc | 716 | int len; |
7b8631b5 MC |
717 | |
718 | switch(param) { | |
fd7255f5 | 719 | case ISCSI_PARAM_CONN_PORT: |
22236961 MC |
720 | spin_lock_bh(&conn->session->lock); |
721 | len = sprintf(buf, "%hu\n", conn->portal_port); | |
722 | spin_unlock_bh(&conn->session->lock); | |
8d2860b3 | 723 | break; |
fd7255f5 | 724 | case ISCSI_PARAM_CONN_ADDRESS: |
22236961 MC |
725 | spin_lock_bh(&conn->session->lock); |
726 | len = sprintf(buf, "%s\n", conn->portal_address); | |
727 | spin_unlock_bh(&conn->session->lock); | |
fd7255f5 MC |
728 | break; |
729 | default: | |
5c75b7fc | 730 | return iscsi_conn_get_param(cls_conn, param, buf); |
fd7255f5 MC |
731 | } |
732 | ||
733 | return len; | |
734 | } | |
735 | ||
7ba24713 | 736 | static void |
38e1a8f5 MC |
737 | iscsi_sw_tcp_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
738 | struct iscsi_stats *stats) | |
7ba24713 | 739 | { |
7b7232f3 | 740 | struct iscsi_conn *conn = cls_conn->dd_data; |
5bb0b55a | 741 | struct iscsi_tcp_conn *tcp_conn = conn->dd_data; |
38e1a8f5 | 742 | struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; |
7ba24713 | 743 | |
7ba24713 AA |
744 | stats->custom_length = 3; |
745 | strcpy(stats->custom[0].desc, "tx_sendpage_failures"); | |
38e1a8f5 | 746 | stats->custom[0].value = tcp_sw_conn->sendpage_failures_cnt; |
7ba24713 | 747 | strcpy(stats->custom[1].desc, "rx_discontiguous_hdr"); |
38e1a8f5 | 748 | stats->custom[1].value = tcp_sw_conn->discontiguous_hdr_cnt; |
7ba24713 AA |
749 | strcpy(stats->custom[2].desc, "eh_abort_cnt"); |
750 | stats->custom[2].value = conn->eh_abort_cnt; | |
38e1a8f5 MC |
751 | |
752 | iscsi_tcp_conn_get_stats(cls_conn, stats); | |
7ba24713 AA |
753 | } |
754 | ||
5bb0b55a | 755 | static struct iscsi_cls_session * |
38e1a8f5 MC |
756 | iscsi_sw_tcp_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max, |
757 | uint16_t qdepth, uint32_t initial_cmdsn, | |
758 | uint32_t *hostno) | |
7ba24713 | 759 | { |
5bb0b55a MC |
760 | struct iscsi_cls_session *cls_session; |
761 | struct iscsi_session *session; | |
06520ede | 762 | struct Scsi_Host *shost; |
7ba24713 | 763 | |
06520ede MC |
764 | if (ep) { |
765 | printk(KERN_ERR "iscsi_tcp: invalid ep %p.\n", ep); | |
75613521 MC |
766 | return NULL; |
767 | } | |
768 | ||
38e1a8f5 | 769 | shost = iscsi_host_alloc(&iscsi_sw_tcp_sht, 0, qdepth); |
75613521 | 770 | if (!shost) |
5bb0b55a | 771 | return NULL; |
38e1a8f5 | 772 | shost->transportt = iscsi_sw_tcp_scsi_transport; |
75613521 MC |
773 | shost->max_lun = iscsi_max_lun; |
774 | shost->max_id = 0; | |
775 | shost->max_channel = 0; | |
30e9ba9f | 776 | shost->max_cmd_len = SCSI_MAX_VARLEN_CDB_SIZE; |
75613521 | 777 | |
a4804cd6 | 778 | if (iscsi_host_add(shost, NULL)) |
75613521 MC |
779 | goto free_host; |
780 | *hostno = shost->host_no; | |
781 | ||
38e1a8f5 MC |
782 | cls_session = iscsi_session_setup(&iscsi_sw_tcp_transport, shost, |
783 | cmds_max, | |
784 | sizeof(struct iscsi_tcp_task) + | |
785 | sizeof(struct iscsi_sw_tcp_hdrbuf), | |
7970634b | 786 | initial_cmdsn, 0); |
75613521 MC |
787 | if (!cls_session) |
788 | goto remove_host; | |
789 | session = cls_session->dd_data; | |
7ba24713 | 790 | |
fbc514b4 | 791 | shost->can_queue = session->scsi_cmds_max; |
38e1a8f5 | 792 | if (iscsi_tcp_r2tpool_alloc(session)) |
75613521 | 793 | goto remove_session; |
5bb0b55a MC |
794 | return cls_session; |
795 | ||
75613521 | 796 | remove_session: |
5bb0b55a | 797 | iscsi_session_teardown(cls_session); |
75613521 | 798 | remove_host: |
a4804cd6 | 799 | iscsi_host_remove(shost); |
75613521 | 800 | free_host: |
a4804cd6 | 801 | iscsi_host_free(shost); |
5bb0b55a MC |
802 | return NULL; |
803 | } | |
804 | ||
38e1a8f5 | 805 | static void iscsi_sw_tcp_session_destroy(struct iscsi_cls_session *cls_session) |
5bb0b55a | 806 | { |
75613521 MC |
807 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
808 | ||
38e1a8f5 | 809 | iscsi_tcp_r2tpool_free(cls_session->dd_data); |
e5bd7b54 | 810 | iscsi_session_teardown(cls_session); |
75613521 | 811 | |
a4804cd6 MC |
812 | iscsi_host_remove(shost); |
813 | iscsi_host_free(shost); | |
7ba24713 AA |
814 | } |
815 | ||
38e1a8f5 | 816 | static int iscsi_sw_tcp_slave_configure(struct scsi_device *sdev) |
d1d81c01 | 817 | { |
b6d44fe9 | 818 | blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY); |
d1d81c01 MC |
819 | blk_queue_dma_alignment(sdev->request_queue, 0); |
820 | return 0; | |
821 | } | |
822 | ||
38e1a8f5 | 823 | static struct scsi_host_template iscsi_sw_tcp_sht = { |
7974392c | 824 | .module = THIS_MODULE, |
f4246b33 | 825 | .name = "iSCSI Initiator over TCP/IP", |
5bb0b55a MC |
826 | .queuecommand = iscsi_queuecommand, |
827 | .change_queue_depth = iscsi_change_queue_depth, | |
1548271e | 828 | .can_queue = ISCSI_DEF_XMIT_CMDS_MAX - 1, |
66bbe0ce | 829 | .sg_tablesize = 4096, |
8231f0ed | 830 | .max_sectors = 0xFFFF, |
5bb0b55a MC |
831 | .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, |
832 | .eh_abort_handler = iscsi_eh_abort, | |
843c0a8a | 833 | .eh_device_reset_handler= iscsi_eh_device_reset, |
8e124525 | 834 | .eh_target_reset_handler= iscsi_eh_target_reset, |
5bb0b55a | 835 | .use_clustering = DISABLE_CLUSTERING, |
38e1a8f5 | 836 | .slave_configure = iscsi_sw_tcp_slave_configure, |
5bb0b55a MC |
837 | .proc_name = "iscsi_tcp", |
838 | .this_id = -1, | |
839 | }; | |
840 | ||
38e1a8f5 | 841 | static struct iscsi_transport iscsi_sw_tcp_transport = { |
7ba24713 AA |
842 | .owner = THIS_MODULE, |
843 | .name = "tcp", | |
844 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST | |
845 | | CAP_DATADGST, | |
fd7255f5 MC |
846 | .param_mask = ISCSI_MAX_RECV_DLENGTH | |
847 | ISCSI_MAX_XMIT_DLENGTH | | |
848 | ISCSI_HDRDGST_EN | | |
849 | ISCSI_DATADGST_EN | | |
850 | ISCSI_INITIAL_R2T_EN | | |
851 | ISCSI_MAX_R2T | | |
852 | ISCSI_IMM_DATA_EN | | |
853 | ISCSI_FIRST_BURST | | |
854 | ISCSI_MAX_BURST | | |
855 | ISCSI_PDU_INORDER_EN | | |
856 | ISCSI_DATASEQ_INORDER_EN | | |
857 | ISCSI_ERL | | |
858 | ISCSI_CONN_PORT | | |
8d2860b3 | 859 | ISCSI_CONN_ADDRESS | |
5c75b7fc MC |
860 | ISCSI_EXP_STATSN | |
861 | ISCSI_PERSISTENT_PORT | | |
862 | ISCSI_PERSISTENT_ADDRESS | | |
b2c64167 MC |
863 | ISCSI_TARGET_NAME | ISCSI_TPGT | |
864 | ISCSI_USERNAME | ISCSI_PASSWORD | | |
843c0a8a | 865 | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | |
f6d5180c MC |
866 | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | |
867 | ISCSI_LU_RESET_TMO | | |
88dfd340 MC |
868 | ISCSI_PING_TMO | ISCSI_RECV_TMO | |
869 | ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, | |
22236961 | 870 | .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | |
d8196ed2 MC |
871 | ISCSI_HOST_INITIATOR_NAME | |
872 | ISCSI_HOST_NETDEV_NAME, | |
5bb0b55a | 873 | /* session management */ |
38e1a8f5 MC |
874 | .create_session = iscsi_sw_tcp_session_create, |
875 | .destroy_session = iscsi_sw_tcp_session_destroy, | |
5bb0b55a | 876 | /* connection management */ |
38e1a8f5 MC |
877 | .create_conn = iscsi_sw_tcp_conn_create, |
878 | .bind_conn = iscsi_sw_tcp_conn_bind, | |
879 | .destroy_conn = iscsi_sw_tcp_conn_destroy, | |
880 | .set_param = iscsi_sw_tcp_conn_set_param, | |
881 | .get_conn_param = iscsi_sw_tcp_conn_get_param, | |
7b8631b5 | 882 | .get_session_param = iscsi_session_get_param, |
7ba24713 | 883 | .start_conn = iscsi_conn_start, |
38e1a8f5 | 884 | .stop_conn = iscsi_sw_tcp_conn_stop, |
0801c242 | 885 | /* iscsi host params */ |
75613521 | 886 | .get_host_param = iscsi_host_get_param, |
0801c242 | 887 | .set_host_param = iscsi_host_set_param, |
5bb0b55a | 888 | /* IO */ |
7ba24713 | 889 | .send_pdu = iscsi_conn_send_pdu, |
38e1a8f5 | 890 | .get_stats = iscsi_sw_tcp_conn_get_stats, |
e5a7efef | 891 | /* iscsi task/cmd helpers */ |
fbc514b4 MC |
892 | .init_task = iscsi_tcp_task_init, |
893 | .xmit_task = iscsi_tcp_task_xmit, | |
894 | .cleanup_task = iscsi_tcp_cleanup_task, | |
e5a7efef | 895 | /* low level pdu helpers */ |
38e1a8f5 MC |
896 | .xmit_pdu = iscsi_sw_tcp_pdu_xmit, |
897 | .init_pdu = iscsi_sw_tcp_pdu_init, | |
898 | .alloc_pdu = iscsi_sw_tcp_pdu_alloc, | |
5bb0b55a | 899 | /* recovery */ |
30a6c652 | 900 | .session_recovery_timedout = iscsi_session_recovery_timedout, |
7ba24713 AA |
901 | }; |
902 | ||
38e1a8f5 | 903 | static int __init iscsi_sw_tcp_init(void) |
7ba24713 | 904 | { |
7ba24713 | 905 | if (iscsi_max_lun < 1) { |
be2df72e OG |
906 | printk(KERN_ERR "iscsi_tcp: Invalid max_lun value of %u\n", |
907 | iscsi_max_lun); | |
7ba24713 AA |
908 | return -EINVAL; |
909 | } | |
7ba24713 | 910 | |
38e1a8f5 MC |
911 | iscsi_sw_tcp_scsi_transport = iscsi_register_transport( |
912 | &iscsi_sw_tcp_transport); | |
913 | if (!iscsi_sw_tcp_scsi_transport) | |
ffbfe925 | 914 | return -ENODEV; |
7ba24713 | 915 | |
7b8631b5 | 916 | return 0; |
7ba24713 AA |
917 | } |
918 | ||
38e1a8f5 | 919 | static void __exit iscsi_sw_tcp_exit(void) |
7ba24713 | 920 | { |
38e1a8f5 | 921 | iscsi_unregister_transport(&iscsi_sw_tcp_transport); |
7ba24713 AA |
922 | } |
923 | ||
38e1a8f5 MC |
924 | module_init(iscsi_sw_tcp_init); |
925 | module_exit(iscsi_sw_tcp_exit); |