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65e7ae7b OG |
1 | /* |
2 | * iSCSI Initiator over iSER Data-Path | |
3 | * | |
4 | * Copyright (C) 2004 Dmitry Yusupov | |
5 | * Copyright (C) 2004 Alex Aizman | |
6 | * Copyright (C) 2005 Mike Christie | |
7 | * Copyright (c) 2005, 2006 Voltaire, Inc. All rights reserved. | |
8 | * maintained by openib-general@openib.org | |
9 | * | |
10 | * This software is available to you under a choice of one of two | |
11 | * licenses. You may choose to be licensed under the terms of the GNU | |
12 | * General Public License (GPL) Version 2, available from the file | |
13 | * COPYING in the main directory of this source tree, or the | |
14 | * OpenIB.org BSD license below: | |
15 | * | |
16 | * Redistribution and use in source and binary forms, with or | |
17 | * without modification, are permitted provided that the following | |
18 | * conditions are met: | |
19 | * | |
20 | * - Redistributions of source code must retain the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer. | |
23 | * | |
24 | * - Redistributions in binary form must reproduce the above | |
25 | * copyright notice, this list of conditions and the following | |
26 | * disclaimer in the documentation and/or other materials | |
27 | * provided with the distribution. | |
28 | * | |
29 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
30 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
31 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
32 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
33 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
34 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
35 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
36 | * SOFTWARE. | |
37 | * | |
38 | * Credits: | |
39 | * Christoph Hellwig | |
40 | * FUJITA Tomonori | |
41 | * Arne Redlich | |
42 | * Zhenyu Wang | |
43 | * Modified by: | |
44 | * Erez Zilber | |
45 | * | |
46 | * | |
47 | * $Id: iscsi_iser.c 6965 2006-05-07 11:36:20Z ogerlitz $ | |
48 | */ | |
49 | ||
50 | #include <linux/types.h> | |
51 | #include <linux/list.h> | |
52 | #include <linux/hardirq.h> | |
53 | #include <linux/kfifo.h> | |
54 | #include <linux/blkdev.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/ioctl.h> | |
65e7ae7b OG |
57 | #include <linux/cdev.h> |
58 | #include <linux/in.h> | |
59 | #include <linux/net.h> | |
60 | #include <linux/scatterlist.h> | |
61 | #include <linux/delay.h> | |
62 | ||
63 | #include <net/sock.h> | |
64 | ||
65 | #include <asm/uaccess.h> | |
66 | ||
67 | #include <scsi/scsi_cmnd.h> | |
68 | #include <scsi/scsi_device.h> | |
69 | #include <scsi/scsi_eh.h> | |
70 | #include <scsi/scsi_tcq.h> | |
71 | #include <scsi/scsi_host.h> | |
72 | #include <scsi/scsi.h> | |
73 | #include <scsi/scsi_transport_iscsi.h> | |
74 | ||
75 | #include "iscsi_iser.h" | |
76 | ||
77 | static unsigned int iscsi_max_lun = 512; | |
78 | module_param_named(max_lun, iscsi_max_lun, uint, S_IRUGO); | |
79 | ||
80 | int iser_debug_level = 0; | |
81 | ||
82 | MODULE_DESCRIPTION("iSER (iSCSI Extensions for RDMA) Datamover " | |
83 | "v" DRV_VER " (" DRV_DATE ")"); | |
84 | MODULE_LICENSE("Dual BSD/GPL"); | |
85 | MODULE_AUTHOR("Alex Nezhinsky, Dan Bar Dov, Or Gerlitz"); | |
86 | ||
87 | module_param_named(debug_level, iser_debug_level, int, 0644); | |
88 | MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:disabled)"); | |
89 | ||
90 | struct iser_global ig; | |
91 | ||
92 | void | |
93 | iscsi_iser_recv(struct iscsi_conn *conn, | |
94 | struct iscsi_hdr *hdr, char *rx_data, int rx_data_len) | |
95 | { | |
96 | int rc = 0; | |
97 | uint32_t ret_itt; | |
98 | int datalen; | |
99 | int ahslen; | |
100 | ||
101 | /* verify PDU length */ | |
102 | datalen = ntoh24(hdr->dlength); | |
103 | if (datalen != rx_data_len) { | |
104 | printk(KERN_ERR "iscsi_iser: datalen %d (hdr) != %d (IB) \n", | |
105 | datalen, rx_data_len); | |
106 | rc = ISCSI_ERR_DATALEN; | |
107 | goto error; | |
108 | } | |
109 | ||
110 | /* read AHS */ | |
111 | ahslen = hdr->hlength * 4; | |
112 | ||
113 | /* verify itt (itt encoding: age+cid+itt) */ | |
114 | rc = iscsi_verify_itt(conn, hdr, &ret_itt); | |
115 | ||
116 | if (!rc) | |
117 | rc = iscsi_complete_pdu(conn, hdr, rx_data, rx_data_len); | |
118 | ||
119 | if (rc && rc != ISCSI_ERR_NO_SCSI_CMD) | |
120 | goto error; | |
121 | ||
122 | return; | |
123 | error: | |
124 | iscsi_conn_failure(conn, rc); | |
125 | } | |
126 | ||
127 | ||
128 | /** | |
129 | * iscsi_iser_cmd_init - Initialize iSCSI SCSI_READ or SCSI_WRITE commands | |
130 | * | |
131 | **/ | |
a8ac6311 | 132 | static int |
65e7ae7b OG |
133 | iscsi_iser_cmd_init(struct iscsi_cmd_task *ctask) |
134 | { | |
135 | struct iscsi_iser_conn *iser_conn = ctask->conn->dd_data; | |
136 | struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; | |
65e7ae7b OG |
137 | |
138 | iser_ctask->command_sent = 0; | |
139 | iser_ctask->iser_conn = iser_conn; | |
65e7ae7b | 140 | iser_ctask_rdma_init(iser_ctask); |
a8ac6311 | 141 | return 0; |
65e7ae7b OG |
142 | } |
143 | ||
144 | /** | |
145 | * iscsi_mtask_xmit - xmit management(immediate) task | |
146 | * @conn: iscsi connection | |
147 | * @mtask: task management task | |
148 | * | |
149 | * Notes: | |
150 | * The function can return -EAGAIN in which case caller must | |
151 | * call it again later, or recover. '0' return code means successful | |
152 | * xmit. | |
153 | * | |
154 | **/ | |
155 | static int | |
156 | iscsi_iser_mtask_xmit(struct iscsi_conn *conn, | |
157 | struct iscsi_mgmt_task *mtask) | |
158 | { | |
159 | int error = 0; | |
160 | ||
161 | debug_scsi("mtask deq [cid %d itt 0x%x]\n", conn->id, mtask->itt); | |
162 | ||
163 | error = iser_send_control(conn, mtask); | |
164 | ||
165 | /* since iser xmits control with zero copy, mtasks can not be recycled | |
166 | * right after sending them. | |
167 | * The recycling scheme is based on whether a response is expected | |
168 | * - if yes, the mtask is recycled at iscsi_complete_pdu | |
169 | * - if no, the mtask is recycled at iser_snd_completion | |
170 | */ | |
f0938401 | 171 | if (error && error != -ENOBUFS) |
65e7ae7b OG |
172 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
173 | ||
174 | return error; | |
175 | } | |
176 | ||
177 | static int | |
178 | iscsi_iser_ctask_xmit_unsol_data(struct iscsi_conn *conn, | |
179 | struct iscsi_cmd_task *ctask) | |
180 | { | |
181 | struct iscsi_data hdr; | |
182 | int error = 0; | |
65e7ae7b OG |
183 | |
184 | /* Send data-out PDUs while there's still unsolicited data to send */ | |
185 | while (ctask->unsol_count > 0) { | |
ffd0436e | 186 | iscsi_prep_unsolicit_data_pdu(ctask, &hdr); |
65e7ae7b OG |
187 | debug_scsi("Sending data-out: itt 0x%x, data count %d\n", |
188 | hdr.itt, ctask->data_count); | |
189 | ||
190 | /* the buffer description has been passed with the command */ | |
191 | /* Send the command */ | |
192 | error = iser_send_data_out(conn, ctask, &hdr); | |
193 | if (error) { | |
194 | ctask->unsol_datasn--; | |
195 | goto iscsi_iser_ctask_xmit_unsol_data_exit; | |
196 | } | |
197 | ctask->unsol_count -= ctask->data_count; | |
198 | debug_scsi("Need to send %d more as data-out PDUs\n", | |
199 | ctask->unsol_count); | |
200 | } | |
201 | ||
202 | iscsi_iser_ctask_xmit_unsol_data_exit: | |
203 | return error; | |
204 | } | |
205 | ||
206 | static int | |
207 | iscsi_iser_ctask_xmit(struct iscsi_conn *conn, | |
208 | struct iscsi_cmd_task *ctask) | |
209 | { | |
210 | struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; | |
211 | int error = 0; | |
212 | ||
77a23c21 | 213 | if (ctask->sc->sc_data_direction == DMA_TO_DEVICE) { |
da9c0c77 | 214 | BUG_ON(scsi_bufflen(ctask->sc) == 0); |
77a23c21 MC |
215 | |
216 | debug_scsi("cmd [itt %x total %d imm %d unsol_data %d\n", | |
da9c0c77 | 217 | ctask->itt, scsi_bufflen(ctask->sc), |
77a23c21 MC |
218 | ctask->imm_count, ctask->unsol_count); |
219 | } | |
220 | ||
65e7ae7b OG |
221 | debug_scsi("ctask deq [cid %d itt 0x%x]\n", |
222 | conn->id, ctask->itt); | |
223 | ||
65e7ae7b OG |
224 | /* Send the cmd PDU */ |
225 | if (!iser_ctask->command_sent) { | |
226 | error = iser_send_command(conn, ctask); | |
227 | if (error) | |
228 | goto iscsi_iser_ctask_xmit_exit; | |
229 | iser_ctask->command_sent = 1; | |
230 | } | |
231 | ||
232 | /* Send unsolicited data-out PDU(s) if necessary */ | |
233 | if (ctask->unsol_count) | |
234 | error = iscsi_iser_ctask_xmit_unsol_data(conn, ctask); | |
235 | ||
236 | iscsi_iser_ctask_xmit_exit: | |
f0938401 | 237 | if (error && error != -ENOBUFS) |
65e7ae7b OG |
238 | iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); |
239 | return error; | |
240 | } | |
241 | ||
242 | static void | |
243 | iscsi_iser_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask) | |
244 | { | |
245 | struct iscsi_iser_cmd_task *iser_ctask = ctask->dd_data; | |
246 | ||
247 | if (iser_ctask->status == ISER_TASK_STATUS_STARTED) { | |
248 | iser_ctask->status = ISER_TASK_STATUS_COMPLETED; | |
249 | iser_ctask_rdma_finalize(iser_ctask); | |
250 | } | |
251 | } | |
252 | ||
253 | static struct iser_conn * | |
254 | iscsi_iser_ib_conn_lookup(__u64 ep_handle) | |
255 | { | |
256 | struct iser_conn *ib_conn; | |
257 | struct iser_conn *uib_conn = (struct iser_conn *)(unsigned long)ep_handle; | |
258 | ||
259 | mutex_lock(&ig.connlist_mutex); | |
260 | list_for_each_entry(ib_conn, &ig.connlist, conn_list) { | |
261 | if (ib_conn == uib_conn) { | |
262 | mutex_unlock(&ig.connlist_mutex); | |
263 | return ib_conn; | |
264 | } | |
265 | } | |
266 | mutex_unlock(&ig.connlist_mutex); | |
267 | iser_err("no conn exists for eph %llx\n",(unsigned long long)ep_handle); | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | static struct iscsi_cls_conn * | |
272 | iscsi_iser_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx) | |
273 | { | |
274 | struct iscsi_conn *conn; | |
275 | struct iscsi_cls_conn *cls_conn; | |
276 | struct iscsi_iser_conn *iser_conn; | |
277 | ||
278 | cls_conn = iscsi_conn_setup(cls_session, conn_idx); | |
279 | if (!cls_conn) | |
280 | return NULL; | |
281 | conn = cls_conn->dd_data; | |
282 | ||
283 | /* | |
284 | * due to issues with the login code re iser sematics | |
285 | * this not set in iscsi_conn_setup - FIXME | |
286 | */ | |
287 | conn->max_recv_dlength = 128; | |
288 | ||
289 | iser_conn = kzalloc(sizeof(*iser_conn), GFP_KERNEL); | |
290 | if (!iser_conn) | |
291 | goto conn_alloc_fail; | |
292 | ||
293 | /* currently this is the only field which need to be initiated */ | |
294 | rwlock_init(&iser_conn->lock); | |
295 | ||
296 | conn->dd_data = iser_conn; | |
297 | iser_conn->iscsi_conn = conn; | |
298 | ||
299 | return cls_conn; | |
300 | ||
301 | conn_alloc_fail: | |
302 | iscsi_conn_teardown(cls_conn); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | static void | |
307 | iscsi_iser_conn_destroy(struct iscsi_cls_conn *cls_conn) | |
308 | { | |
309 | struct iscsi_conn *conn = cls_conn->dd_data; | |
310 | struct iscsi_iser_conn *iser_conn = conn->dd_data; | |
311 | ||
312 | iscsi_conn_teardown(cls_conn); | |
87e8df7a EZ |
313 | if (iser_conn->ib_conn) |
314 | iser_conn->ib_conn->iser_conn = NULL; | |
65e7ae7b OG |
315 | kfree(iser_conn); |
316 | } | |
317 | ||
318 | static int | |
319 | iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session, | |
320 | struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, | |
321 | int is_leading) | |
322 | { | |
323 | struct iscsi_conn *conn = cls_conn->dd_data; | |
324 | struct iscsi_iser_conn *iser_conn; | |
325 | struct iser_conn *ib_conn; | |
326 | int error; | |
327 | ||
328 | error = iscsi_conn_bind(cls_session, cls_conn, is_leading); | |
329 | if (error) | |
330 | return error; | |
331 | ||
332 | /* the transport ep handle comes from user space so it must be | |
333 | * verified against the global ib connections list */ | |
334 | ib_conn = iscsi_iser_ib_conn_lookup(transport_eph); | |
335 | if (!ib_conn) { | |
336 | iser_err("can't bind eph %llx\n", | |
337 | (unsigned long long)transport_eph); | |
338 | return -EINVAL; | |
339 | } | |
340 | /* binds the iSER connection retrieved from the previously | |
341 | * connected ep_handle to the iSCSI layer connection. exchanges | |
342 | * connection pointers */ | |
343 | iser_err("binding iscsi conn %p to iser_conn %p\n",conn,ib_conn); | |
344 | iser_conn = conn->dd_data; | |
345 | ib_conn->iser_conn = iser_conn; | |
346 | iser_conn->ib_conn = ib_conn; | |
347 | ||
348 | conn->recv_lock = &iser_conn->lock; | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | static int | |
354 | iscsi_iser_conn_start(struct iscsi_cls_conn *cls_conn) | |
355 | { | |
356 | struct iscsi_conn *conn = cls_conn->dd_data; | |
357 | int err; | |
358 | ||
2e7a7426 | 359 | err = iser_conn_set_full_featured_mode(conn); |
65e7ae7b OG |
360 | if (err) |
361 | return err; | |
362 | ||
2e7a7426 | 363 | return iscsi_conn_start(cls_conn); |
65e7ae7b OG |
364 | } |
365 | ||
65e7ae7b OG |
366 | static struct iscsi_transport iscsi_iser_transport; |
367 | ||
368 | static struct iscsi_cls_session * | |
369 | iscsi_iser_session_create(struct iscsi_transport *iscsit, | |
370 | struct scsi_transport_template *scsit, | |
40753caa | 371 | struct Scsi_Host *shost, |
1548271e MC |
372 | uint16_t cmds_max, uint16_t qdepth, |
373 | uint32_t initial_cmdsn, uint32_t *hostno) | |
65e7ae7b OG |
374 | { |
375 | struct iscsi_cls_session *cls_session; | |
376 | struct iscsi_session *session; | |
377 | int i; | |
378 | uint32_t hn; | |
379 | struct iscsi_cmd_task *ctask; | |
380 | struct iscsi_mgmt_task *mtask; | |
381 | struct iscsi_iser_cmd_task *iser_ctask; | |
382 | struct iser_desc *desc; | |
383 | ||
1548271e MC |
384 | /* |
385 | * we do not support setting can_queue cmd_per_lun from userspace yet | |
386 | * because we preallocate so many resources | |
387 | */ | |
65e7ae7b | 388 | cls_session = iscsi_session_setup(iscsit, scsit, |
1548271e MC |
389 | ISCSI_DEF_XMIT_CMDS_MAX, |
390 | ISCSI_MAX_CMD_PER_LUN, | |
65e7ae7b OG |
391 | sizeof(struct iscsi_iser_cmd_task), |
392 | sizeof(struct iser_desc), | |
393 | initial_cmdsn, &hn); | |
394 | if (!cls_session) | |
395 | return NULL; | |
396 | ||
397 | *hostno = hn; | |
398 | session = class_to_transport_session(cls_session); | |
399 | ||
400 | /* libiscsi setup itts, data and pool so just set desc fields */ | |
401 | for (i = 0; i < session->cmds_max; i++) { | |
402 | ctask = session->cmds[i]; | |
403 | iser_ctask = ctask->dd_data; | |
404 | ctask->hdr = (struct iscsi_cmd *)&iser_ctask->desc.iscsi_header; | |
38ad03de | 405 | ctask->hdr_max = sizeof(iser_ctask->desc.iscsi_header); |
65e7ae7b OG |
406 | } |
407 | ||
408 | for (i = 0; i < session->mgmtpool_max; i++) { | |
409 | mtask = session->mgmt_cmds[i]; | |
410 | desc = mtask->dd_data; | |
411 | mtask->hdr = &desc->iscsi_header; | |
412 | desc->data = mtask->data; | |
413 | } | |
414 | ||
415 | return cls_session; | |
416 | } | |
417 | ||
418 | static int | |
358ff019 MC |
419 | iscsi_iser_set_param(struct iscsi_cls_conn *cls_conn, |
420 | enum iscsi_param param, char *buf, int buflen) | |
65e7ae7b | 421 | { |
358ff019 | 422 | int value; |
65e7ae7b OG |
423 | |
424 | switch (param) { | |
425 | case ISCSI_PARAM_MAX_RECV_DLENGTH: | |
426 | /* TBD */ | |
427 | break; | |
65e7ae7b | 428 | case ISCSI_PARAM_HDRDGST_EN: |
358ff019 | 429 | sscanf(buf, "%d", &value); |
65e7ae7b OG |
430 | if (value) { |
431 | printk(KERN_ERR "DataDigest wasn't negotiated to None"); | |
432 | return -EPROTO; | |
433 | } | |
434 | break; | |
435 | case ISCSI_PARAM_DATADGST_EN: | |
358ff019 | 436 | sscanf(buf, "%d", &value); |
65e7ae7b OG |
437 | if (value) { |
438 | printk(KERN_ERR "DataDigest wasn't negotiated to None"); | |
439 | return -EPROTO; | |
440 | } | |
441 | break; | |
65e7ae7b | 442 | case ISCSI_PARAM_IFMARKER_EN: |
358ff019 | 443 | sscanf(buf, "%d", &value); |
65e7ae7b OG |
444 | if (value) { |
445 | printk(KERN_ERR "IFMarker wasn't negotiated to No"); | |
446 | return -EPROTO; | |
447 | } | |
448 | break; | |
449 | case ISCSI_PARAM_OFMARKER_EN: | |
358ff019 | 450 | sscanf(buf, "%d", &value); |
65e7ae7b OG |
451 | if (value) { |
452 | printk(KERN_ERR "OFMarker wasn't negotiated to No"); | |
453 | return -EPROTO; | |
454 | } | |
455 | break; | |
456 | default: | |
358ff019 | 457 | return iscsi_set_param(cls_conn, param, buf, buflen); |
65e7ae7b OG |
458 | } |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
65e7ae7b OG |
463 | static void |
464 | iscsi_iser_conn_get_stats(struct iscsi_cls_conn *cls_conn, struct iscsi_stats *stats) | |
465 | { | |
466 | struct iscsi_conn *conn = cls_conn->dd_data; | |
467 | ||
468 | stats->txdata_octets = conn->txdata_octets; | |
469 | stats->rxdata_octets = conn->rxdata_octets; | |
470 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; | |
471 | stats->dataout_pdus = conn->dataout_pdus_cnt; | |
472 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; | |
473 | stats->datain_pdus = conn->datain_pdus_cnt; /* always 0 */ | |
474 | stats->r2t_pdus = conn->r2t_pdus_cnt; /* always 0 */ | |
475 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; | |
476 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; | |
87528227 | 477 | stats->custom_length = 4; |
65e7ae7b OG |
478 | strcpy(stats->custom[0].desc, "qp_tx_queue_full"); |
479 | stats->custom[0].value = 0; /* TB iser_conn->qp_tx_queue_full; */ | |
480 | strcpy(stats->custom[1].desc, "fmr_map_not_avail"); | |
481 | stats->custom[1].value = 0; /* TB iser_conn->fmr_map_not_avail */; | |
482 | strcpy(stats->custom[2].desc, "eh_abort_cnt"); | |
483 | stats->custom[2].value = conn->eh_abort_cnt; | |
87528227 ED |
484 | strcpy(stats->custom[3].desc, "fmr_unalign_cnt"); |
485 | stats->custom[3].value = conn->fmr_unalign_cnt; | |
65e7ae7b OG |
486 | } |
487 | ||
488 | static int | |
489 | iscsi_iser_ep_connect(struct sockaddr *dst_addr, int non_blocking, | |
490 | __u64 *ep_handle) | |
491 | { | |
492 | int err; | |
493 | struct iser_conn *ib_conn; | |
494 | ||
495 | err = iser_conn_init(&ib_conn); | |
496 | if (err) | |
497 | goto out; | |
498 | ||
499 | err = iser_connect(ib_conn, NULL, (struct sockaddr_in *)dst_addr, non_blocking); | |
500 | if (!err) | |
501 | *ep_handle = (__u64)(unsigned long)ib_conn; | |
502 | ||
503 | out: | |
504 | return err; | |
505 | } | |
506 | ||
507 | static int | |
508 | iscsi_iser_ep_poll(__u64 ep_handle, int timeout_ms) | |
509 | { | |
510 | struct iser_conn *ib_conn = iscsi_iser_ib_conn_lookup(ep_handle); | |
511 | int rc; | |
512 | ||
513 | if (!ib_conn) | |
514 | return -EINVAL; | |
515 | ||
516 | rc = wait_event_interruptible_timeout(ib_conn->wait, | |
517 | ib_conn->state == ISER_CONN_UP, | |
518 | msecs_to_jiffies(timeout_ms)); | |
519 | ||
520 | /* if conn establishment failed, return error code to iscsi */ | |
521 | if (!rc && | |
522 | (ib_conn->state == ISER_CONN_TERMINATING || | |
523 | ib_conn->state == ISER_CONN_DOWN)) | |
524 | rc = -1; | |
525 | ||
526 | iser_err("ib conn %p rc = %d\n", ib_conn, rc); | |
527 | ||
528 | if (rc > 0) | |
529 | return 1; /* success, this is the equivalent of POLLOUT */ | |
530 | else if (!rc) | |
531 | return 0; /* timeout */ | |
532 | else | |
533 | return rc; /* signal */ | |
534 | } | |
535 | ||
536 | static void | |
537 | iscsi_iser_ep_disconnect(__u64 ep_handle) | |
538 | { | |
1c83469d | 539 | struct iser_conn *ib_conn; |
65e7ae7b | 540 | |
1c83469d | 541 | ib_conn = iscsi_iser_ib_conn_lookup(ep_handle); |
65e7ae7b OG |
542 | if (!ib_conn) |
543 | return; | |
544 | ||
545 | iser_err("ib conn %p state %d\n",ib_conn, ib_conn->state); | |
65e7ae7b OG |
546 | iser_conn_terminate(ib_conn); |
547 | } | |
548 | ||
549 | static struct scsi_host_template iscsi_iser_sht = { | |
7974392c | 550 | .module = THIS_MODULE, |
65e7ae7b OG |
551 | .name = "iSCSI Initiator over iSER, v." DRV_VER, |
552 | .queuecommand = iscsi_queuecommand, | |
6410627e | 553 | .change_queue_depth = iscsi_change_queue_depth, |
1548271e | 554 | .can_queue = ISCSI_DEF_XMIT_CMDS_MAX - 1, |
65e7ae7b | 555 | .sg_tablesize = ISCSI_ISER_SG_TABLESIZE, |
8072ec2f | 556 | .max_sectors = 1024, |
65e7ae7b OG |
557 | .cmd_per_lun = ISCSI_MAX_CMD_PER_LUN, |
558 | .eh_abort_handler = iscsi_eh_abort, | |
90c18f3c | 559 | .eh_device_reset_handler= iscsi_eh_device_reset, |
65e7ae7b OG |
560 | .eh_host_reset_handler = iscsi_eh_host_reset, |
561 | .use_clustering = DISABLE_CLUSTERING, | |
562 | .proc_name = "iscsi_iser", | |
563 | .this_id = -1, | |
564 | }; | |
565 | ||
566 | static struct iscsi_transport iscsi_iser_transport = { | |
567 | .owner = THIS_MODULE, | |
568 | .name = "iser", | |
569 | .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T, | |
570 | .param_mask = ISCSI_MAX_RECV_DLENGTH | | |
571 | ISCSI_MAX_XMIT_DLENGTH | | |
572 | ISCSI_HDRDGST_EN | | |
573 | ISCSI_DATADGST_EN | | |
574 | ISCSI_INITIAL_R2T_EN | | |
575 | ISCSI_MAX_R2T | | |
576 | ISCSI_IMM_DATA_EN | | |
577 | ISCSI_FIRST_BURST | | |
578 | ISCSI_MAX_BURST | | |
579 | ISCSI_PDU_INORDER_EN | | |
358ff019 MC |
580 | ISCSI_DATASEQ_INORDER_EN | |
581 | ISCSI_EXP_STATSN | | |
582 | ISCSI_PERSISTENT_PORT | | |
583 | ISCSI_PERSISTENT_ADDRESS | | |
b2c64167 MC |
584 | ISCSI_TARGET_NAME | ISCSI_TPGT | |
585 | ISCSI_USERNAME | ISCSI_PASSWORD | | |
f6d5180c MC |
586 | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | |
587 | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | | |
588 | ISCSI_PING_TMO | ISCSI_RECV_TMO, | |
8ad5781a | 589 | .host_param_mask = ISCSI_HOST_HWADDRESS | |
d8196ed2 | 590 | ISCSI_HOST_NETDEV_NAME | |
8ad5781a | 591 | ISCSI_HOST_INITIATOR_NAME, |
65e7ae7b OG |
592 | .host_template = &iscsi_iser_sht, |
593 | .conndata_size = sizeof(struct iscsi_conn), | |
594 | .max_lun = ISCSI_ISER_MAX_LUN, | |
65e7ae7b OG |
595 | /* session management */ |
596 | .create_session = iscsi_iser_session_create, | |
597 | .destroy_session = iscsi_session_teardown, | |
598 | /* connection management */ | |
599 | .create_conn = iscsi_iser_conn_create, | |
600 | .bind_conn = iscsi_iser_conn_bind, | |
601 | .destroy_conn = iscsi_iser_conn_destroy, | |
358ff019 MC |
602 | .set_param = iscsi_iser_set_param, |
603 | .get_conn_param = iscsi_conn_get_param, | |
604 | .get_session_param = iscsi_session_get_param, | |
65e7ae7b OG |
605 | .start_conn = iscsi_iser_conn_start, |
606 | .stop_conn = iscsi_conn_stop, | |
0801c242 MC |
607 | /* iscsi host params */ |
608 | .get_host_param = iscsi_host_get_param, | |
609 | .set_host_param = iscsi_host_set_param, | |
65e7ae7b OG |
610 | /* IO */ |
611 | .send_pdu = iscsi_conn_send_pdu, | |
612 | .get_stats = iscsi_iser_conn_get_stats, | |
613 | .init_cmd_task = iscsi_iser_cmd_init, | |
614 | .xmit_cmd_task = iscsi_iser_ctask_xmit, | |
615 | .xmit_mgmt_task = iscsi_iser_mtask_xmit, | |
616 | .cleanup_cmd_task = iscsi_iser_cleanup_ctask, | |
617 | /* recovery */ | |
618 | .session_recovery_timedout = iscsi_session_recovery_timedout, | |
619 | ||
620 | .ep_connect = iscsi_iser_ep_connect, | |
621 | .ep_poll = iscsi_iser_ep_poll, | |
622 | .ep_disconnect = iscsi_iser_ep_disconnect | |
623 | }; | |
624 | ||
625 | static int __init iser_init(void) | |
626 | { | |
627 | int err; | |
628 | ||
629 | iser_dbg("Starting iSER datamover...\n"); | |
630 | ||
631 | if (iscsi_max_lun < 1) { | |
632 | printk(KERN_ERR "Invalid max_lun value of %u\n", iscsi_max_lun); | |
633 | return -EINVAL; | |
634 | } | |
635 | ||
636 | iscsi_iser_transport.max_lun = iscsi_max_lun; | |
637 | ||
638 | memset(&ig, 0, sizeof(struct iser_global)); | |
639 | ||
640 | ig.desc_cache = kmem_cache_create("iser_descriptors", | |
641 | sizeof (struct iser_desc), | |
642 | 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 643 | NULL); |
65e7ae7b OG |
644 | if (ig.desc_cache == NULL) |
645 | return -ENOMEM; | |
646 | ||
647 | /* device init is called only after the first addr resolution */ | |
648 | mutex_init(&ig.device_list_mutex); | |
649 | INIT_LIST_HEAD(&ig.device_list); | |
650 | mutex_init(&ig.connlist_mutex); | |
651 | INIT_LIST_HEAD(&ig.connlist); | |
652 | ||
653 | if (!iscsi_register_transport(&iscsi_iser_transport)) { | |
654 | iser_err("iscsi_register_transport failed\n"); | |
655 | err = -EINVAL; | |
656 | goto register_transport_failure; | |
657 | } | |
658 | ||
659 | return 0; | |
660 | ||
661 | register_transport_failure: | |
662 | kmem_cache_destroy(ig.desc_cache); | |
663 | ||
664 | return err; | |
665 | } | |
666 | ||
667 | static void __exit iser_exit(void) | |
668 | { | |
669 | iser_dbg("Removing iSER datamover...\n"); | |
670 | iscsi_unregister_transport(&iscsi_iser_transport); | |
671 | kmem_cache_destroy(ig.desc_cache); | |
672 | } | |
673 | ||
674 | module_init(iser_init); | |
675 | module_exit(iser_exit); |