]>
Commit | Line | Data |
---|---|---|
e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains main functions related to the iSCSI Target Core Driver. | |
3 | * | |
4 | * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. | |
5 | * | |
6 | * Licensed to the Linux Foundation under the General Public License (GPL) version 2. | |
7 | * | |
8 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
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 by | |
12 | * 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, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | ******************************************************************************/ | |
20 | ||
21 | #include <linux/string.h> | |
22 | #include <linux/kthread.h> | |
23 | #include <linux/crypto.h> | |
24 | #include <linux/completion.h> | |
827509e3 | 25 | #include <linux/module.h> |
40401530 | 26 | #include <linux/idr.h> |
e48354ce NB |
27 | #include <asm/unaligned.h> |
28 | #include <scsi/scsi_device.h> | |
29 | #include <scsi/iscsi_proto.h> | |
d28b1169 | 30 | #include <scsi/scsi_tcq.h> |
e48354ce | 31 | #include <target/target_core_base.h> |
c4795fb2 | 32 | #include <target/target_core_fabric.h> |
d28b1169 | 33 | #include <target/target_core_configfs.h> |
e48354ce NB |
34 | |
35 | #include "iscsi_target_core.h" | |
36 | #include "iscsi_target_parameters.h" | |
37 | #include "iscsi_target_seq_pdu_list.h" | |
38 | #include "iscsi_target_tq.h" | |
39 | #include "iscsi_target_configfs.h" | |
40 | #include "iscsi_target_datain_values.h" | |
41 | #include "iscsi_target_erl0.h" | |
42 | #include "iscsi_target_erl1.h" | |
43 | #include "iscsi_target_erl2.h" | |
44 | #include "iscsi_target_login.h" | |
45 | #include "iscsi_target_tmr.h" | |
46 | #include "iscsi_target_tpg.h" | |
47 | #include "iscsi_target_util.h" | |
48 | #include "iscsi_target.h" | |
49 | #include "iscsi_target_device.h" | |
50 | #include "iscsi_target_stat.h" | |
51 | ||
52 | static LIST_HEAD(g_tiqn_list); | |
53 | static LIST_HEAD(g_np_list); | |
54 | static DEFINE_SPINLOCK(tiqn_lock); | |
55 | static DEFINE_SPINLOCK(np_lock); | |
56 | ||
57 | static struct idr tiqn_idr; | |
58 | struct idr sess_idr; | |
59 | struct mutex auth_id_lock; | |
60 | spinlock_t sess_idr_lock; | |
61 | ||
62 | struct iscsit_global *iscsit_global; | |
63 | ||
64 | struct kmem_cache *lio_cmd_cache; | |
65 | struct kmem_cache *lio_qr_cache; | |
66 | struct kmem_cache *lio_dr_cache; | |
67 | struct kmem_cache *lio_ooo_cache; | |
68 | struct kmem_cache *lio_r2t_cache; | |
69 | ||
70 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
71 | unsigned char *buf, u32); | |
72 | static int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *); | |
73 | ||
74 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
75 | { | |
76 | struct iscsi_tiqn *tiqn = NULL; | |
77 | ||
78 | spin_lock(&tiqn_lock); | |
79 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
80 | if (!strcmp(tiqn->tiqn, buf)) { | |
81 | ||
82 | spin_lock(&tiqn->tiqn_state_lock); | |
83 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
84 | tiqn->tiqn_access_count++; | |
85 | spin_unlock(&tiqn->tiqn_state_lock); | |
86 | spin_unlock(&tiqn_lock); | |
87 | return tiqn; | |
88 | } | |
89 | spin_unlock(&tiqn->tiqn_state_lock); | |
90 | } | |
91 | } | |
92 | spin_unlock(&tiqn_lock); | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
97 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
98 | { | |
99 | spin_lock(&tiqn->tiqn_state_lock); | |
100 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
101 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
102 | spin_unlock(&tiqn->tiqn_state_lock); | |
103 | return 0; | |
104 | } | |
105 | spin_unlock(&tiqn->tiqn_state_lock); | |
106 | ||
107 | return -1; | |
108 | } | |
109 | ||
110 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
111 | { | |
112 | spin_lock(&tiqn->tiqn_state_lock); | |
113 | tiqn->tiqn_access_count--; | |
114 | spin_unlock(&tiqn->tiqn_state_lock); | |
115 | } | |
116 | ||
117 | /* | |
118 | * Note that IQN formatting is expected to be done in userspace, and | |
119 | * no explict IQN format checks are done here. | |
120 | */ | |
121 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
122 | { | |
123 | struct iscsi_tiqn *tiqn = NULL; | |
124 | int ret; | |
125 | ||
8f50c7f5 | 126 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
127 | pr_err("Target IQN exceeds %d bytes\n", |
128 | ISCSI_IQN_LEN); | |
129 | return ERR_PTR(-EINVAL); | |
130 | } | |
131 | ||
132 | tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); | |
133 | if (!tiqn) { | |
134 | pr_err("Unable to allocate struct iscsi_tiqn\n"); | |
135 | return ERR_PTR(-ENOMEM); | |
136 | } | |
137 | ||
138 | sprintf(tiqn->tiqn, "%s", buf); | |
139 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
140 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
141 | spin_lock_init(&tiqn->tiqn_state_lock); | |
142 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
143 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
144 | spin_lock_init(&tiqn->login_stats.lock); | |
145 | spin_lock_init(&tiqn->logout_stats.lock); | |
146 | ||
147 | if (!idr_pre_get(&tiqn_idr, GFP_KERNEL)) { | |
148 | pr_err("idr_pre_get() for tiqn_idr failed\n"); | |
149 | kfree(tiqn); | |
150 | return ERR_PTR(-ENOMEM); | |
151 | } | |
152 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; | |
153 | ||
154 | spin_lock(&tiqn_lock); | |
155 | ret = idr_get_new(&tiqn_idr, NULL, &tiqn->tiqn_index); | |
156 | if (ret < 0) { | |
157 | pr_err("idr_get_new() failed for tiqn->tiqn_index\n"); | |
158 | spin_unlock(&tiqn_lock); | |
159 | kfree(tiqn); | |
160 | return ERR_PTR(ret); | |
161 | } | |
162 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); | |
163 | spin_unlock(&tiqn_lock); | |
164 | ||
165 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
166 | ||
167 | return tiqn; | |
168 | ||
169 | } | |
170 | ||
171 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
172 | { | |
173 | /* | |
174 | * Wait for accesses to said struct iscsi_tiqn to end. | |
175 | */ | |
176 | spin_lock(&tiqn->tiqn_state_lock); | |
177 | while (tiqn->tiqn_access_count != 0) { | |
178 | spin_unlock(&tiqn->tiqn_state_lock); | |
179 | msleep(10); | |
180 | spin_lock(&tiqn->tiqn_state_lock); | |
181 | } | |
182 | spin_unlock(&tiqn->tiqn_state_lock); | |
183 | } | |
184 | ||
185 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
186 | { | |
187 | /* | |
188 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
189 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
190 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
191 | * fabric and control code paths. | |
192 | */ | |
193 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
194 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
195 | return; | |
196 | } | |
197 | ||
198 | iscsit_wait_for_tiqn(tiqn); | |
199 | ||
200 | spin_lock(&tiqn_lock); | |
201 | list_del(&tiqn->tiqn_list); | |
202 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
203 | spin_unlock(&tiqn_lock); | |
204 | ||
205 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
206 | tiqn->tiqn); | |
207 | kfree(tiqn); | |
208 | } | |
209 | ||
210 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
211 | { | |
212 | int ret; | |
213 | /* | |
214 | * Determine if the network portal is accepting storage traffic. | |
215 | */ | |
216 | spin_lock_bh(&np->np_thread_lock); | |
217 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
218 | spin_unlock_bh(&np->np_thread_lock); | |
219 | return -1; | |
220 | } | |
221 | if (np->np_login_tpg) { | |
222 | pr_err("np->np_login_tpg() is not NULL!\n"); | |
223 | spin_unlock_bh(&np->np_thread_lock); | |
224 | return -1; | |
225 | } | |
226 | spin_unlock_bh(&np->np_thread_lock); | |
227 | /* | |
228 | * Determine if the portal group is accepting storage traffic. | |
229 | */ | |
230 | spin_lock_bh(&tpg->tpg_state_lock); | |
231 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
232 | spin_unlock_bh(&tpg->tpg_state_lock); | |
233 | return -1; | |
234 | } | |
235 | spin_unlock_bh(&tpg->tpg_state_lock); | |
236 | ||
237 | /* | |
238 | * Here we serialize access across the TIQN+TPG Tuple. | |
239 | */ | |
240 | ret = mutex_lock_interruptible(&tpg->np_login_lock); | |
241 | if ((ret != 0) || signal_pending(current)) | |
242 | return -1; | |
243 | ||
244 | spin_lock_bh(&np->np_thread_lock); | |
245 | np->np_login_tpg = tpg; | |
246 | spin_unlock_bh(&np->np_thread_lock); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
252 | { | |
253 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
254 | ||
255 | spin_lock_bh(&np->np_thread_lock); | |
256 | np->np_login_tpg = NULL; | |
257 | spin_unlock_bh(&np->np_thread_lock); | |
258 | ||
259 | mutex_unlock(&tpg->np_login_lock); | |
260 | ||
261 | if (tiqn) | |
262 | iscsit_put_tiqn_for_login(tiqn); | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | static struct iscsi_np *iscsit_get_np( | |
268 | struct __kernel_sockaddr_storage *sockaddr, | |
269 | int network_transport) | |
270 | { | |
271 | struct sockaddr_in *sock_in, *sock_in_e; | |
272 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
273 | struct iscsi_np *np; | |
274 | int ip_match = 0; | |
275 | u16 port; | |
276 | ||
277 | spin_lock_bh(&np_lock); | |
278 | list_for_each_entry(np, &g_np_list, np_list) { | |
279 | spin_lock(&np->np_thread_lock); | |
280 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
281 | spin_unlock(&np->np_thread_lock); | |
282 | continue; | |
283 | } | |
284 | ||
285 | if (sockaddr->ss_family == AF_INET6) { | |
286 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
287 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
288 | ||
8359cf43 JE |
289 | if (!memcmp(&sock_in6->sin6_addr.in6_u, |
290 | &sock_in6_e->sin6_addr.in6_u, | |
e48354ce NB |
291 | sizeof(struct in6_addr))) |
292 | ip_match = 1; | |
293 | ||
294 | port = ntohs(sock_in6->sin6_port); | |
295 | } else { | |
296 | sock_in = (struct sockaddr_in *)sockaddr; | |
297 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
298 | ||
299 | if (sock_in->sin_addr.s_addr == | |
300 | sock_in_e->sin_addr.s_addr) | |
301 | ip_match = 1; | |
302 | ||
303 | port = ntohs(sock_in->sin_port); | |
304 | } | |
305 | ||
306 | if ((ip_match == 1) && (np->np_port == port) && | |
307 | (np->np_network_transport == network_transport)) { | |
308 | /* | |
309 | * Increment the np_exports reference count now to | |
310 | * prevent iscsit_del_np() below from being called | |
311 | * while iscsi_tpg_add_network_portal() is called. | |
312 | */ | |
313 | np->np_exports++; | |
314 | spin_unlock(&np->np_thread_lock); | |
315 | spin_unlock_bh(&np_lock); | |
316 | return np; | |
317 | } | |
318 | spin_unlock(&np->np_thread_lock); | |
319 | } | |
320 | spin_unlock_bh(&np_lock); | |
321 | ||
322 | return NULL; | |
323 | } | |
324 | ||
325 | struct iscsi_np *iscsit_add_np( | |
326 | struct __kernel_sockaddr_storage *sockaddr, | |
327 | char *ip_str, | |
328 | int network_transport) | |
329 | { | |
330 | struct sockaddr_in *sock_in; | |
331 | struct sockaddr_in6 *sock_in6; | |
332 | struct iscsi_np *np; | |
333 | int ret; | |
334 | /* | |
335 | * Locate the existing struct iscsi_np if already active.. | |
336 | */ | |
337 | np = iscsit_get_np(sockaddr, network_transport); | |
338 | if (np) | |
339 | return np; | |
340 | ||
341 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
342 | if (!np) { | |
343 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
344 | return ERR_PTR(-ENOMEM); | |
345 | } | |
346 | ||
347 | np->np_flags |= NPF_IP_NETWORK; | |
348 | if (sockaddr->ss_family == AF_INET6) { | |
349 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
350 | snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); | |
351 | np->np_port = ntohs(sock_in6->sin6_port); | |
352 | } else { | |
353 | sock_in = (struct sockaddr_in *)sockaddr; | |
354 | sprintf(np->np_ip, "%s", ip_str); | |
355 | np->np_port = ntohs(sock_in->sin_port); | |
356 | } | |
357 | ||
358 | np->np_network_transport = network_transport; | |
359 | spin_lock_init(&np->np_thread_lock); | |
360 | init_completion(&np->np_restart_comp); | |
361 | INIT_LIST_HEAD(&np->np_list); | |
362 | ||
363 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
364 | if (ret != 0) { | |
365 | kfree(np); | |
366 | return ERR_PTR(ret); | |
367 | } | |
368 | ||
369 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
370 | if (IS_ERR(np->np_thread)) { | |
371 | pr_err("Unable to create kthread: iscsi_np\n"); | |
372 | ret = PTR_ERR(np->np_thread); | |
373 | kfree(np); | |
374 | return ERR_PTR(ret); | |
375 | } | |
376 | /* | |
377 | * Increment the np_exports reference count now to prevent | |
378 | * iscsit_del_np() below from being run while a new call to | |
379 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
380 | * active. We don't need to hold np->np_thread_lock at this | |
381 | * point because iscsi_np has not been added to g_np_list yet. | |
382 | */ | |
383 | np->np_exports = 1; | |
384 | ||
385 | spin_lock_bh(&np_lock); | |
386 | list_add_tail(&np->np_list, &g_np_list); | |
387 | spin_unlock_bh(&np_lock); | |
388 | ||
389 | pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", | |
390 | np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? | |
391 | "TCP" : "SCTP"); | |
392 | ||
393 | return np; | |
394 | } | |
395 | ||
396 | int iscsit_reset_np_thread( | |
397 | struct iscsi_np *np, | |
398 | struct iscsi_tpg_np *tpg_np, | |
399 | struct iscsi_portal_group *tpg) | |
400 | { | |
401 | spin_lock_bh(&np->np_thread_lock); | |
402 | if (tpg && tpg_np) { | |
403 | /* | |
404 | * The reset operation need only be performed when the | |
405 | * passed struct iscsi_portal_group has a login in progress | |
406 | * to one of the network portals. | |
407 | */ | |
408 | if (tpg_np->tpg_np->np_login_tpg != tpg) { | |
409 | spin_unlock_bh(&np->np_thread_lock); | |
410 | return 0; | |
411 | } | |
412 | } | |
413 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { | |
414 | spin_unlock_bh(&np->np_thread_lock); | |
415 | return 0; | |
416 | } | |
417 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
418 | ||
419 | if (np->np_thread) { | |
420 | spin_unlock_bh(&np->np_thread_lock); | |
421 | send_sig(SIGINT, np->np_thread, 1); | |
422 | wait_for_completion(&np->np_restart_comp); | |
423 | spin_lock_bh(&np->np_thread_lock); | |
424 | } | |
425 | spin_unlock_bh(&np->np_thread_lock); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
fceb5bc7 | 430 | static int iscsit_del_np_comm(struct iscsi_np *np) |
e48354ce | 431 | { |
bf6932f4 AV |
432 | if (np->np_socket) |
433 | sock_release(np->np_socket); | |
e48354ce NB |
434 | return 0; |
435 | } | |
436 | ||
437 | int iscsit_del_np(struct iscsi_np *np) | |
438 | { | |
439 | spin_lock_bh(&np->np_thread_lock); | |
440 | np->np_exports--; | |
441 | if (np->np_exports) { | |
442 | spin_unlock_bh(&np->np_thread_lock); | |
443 | return 0; | |
444 | } | |
445 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
446 | spin_unlock_bh(&np->np_thread_lock); | |
447 | ||
448 | if (np->np_thread) { | |
449 | /* | |
450 | * We need to send the signal to wakeup Linux/Net | |
451 | * which may be sleeping in sock_accept().. | |
452 | */ | |
453 | send_sig(SIGINT, np->np_thread, 1); | |
454 | kthread_stop(np->np_thread); | |
455 | } | |
456 | iscsit_del_np_comm(np); | |
457 | ||
458 | spin_lock_bh(&np_lock); | |
459 | list_del(&np->np_list); | |
460 | spin_unlock_bh(&np_lock); | |
461 | ||
462 | pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", | |
463 | np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? | |
464 | "TCP" : "SCTP"); | |
465 | ||
466 | kfree(np); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static int __init iscsi_target_init_module(void) | |
471 | { | |
472 | int ret = 0; | |
473 | ||
474 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
475 | ||
476 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
477 | if (!iscsit_global) { | |
478 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
479 | return -1; | |
480 | } | |
481 | mutex_init(&auth_id_lock); | |
482 | spin_lock_init(&sess_idr_lock); | |
483 | idr_init(&tiqn_idr); | |
484 | idr_init(&sess_idr); | |
485 | ||
486 | ret = iscsi_target_register_configfs(); | |
487 | if (ret < 0) | |
488 | goto out; | |
489 | ||
490 | ret = iscsi_thread_set_init(); | |
491 | if (ret < 0) | |
492 | goto configfs_out; | |
493 | ||
494 | if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != | |
495 | TARGET_THREAD_SET_COUNT) { | |
496 | pr_err("iscsi_allocate_thread_sets() returned" | |
497 | " unexpected value!\n"); | |
498 | goto ts_out1; | |
499 | } | |
500 | ||
501 | lio_cmd_cache = kmem_cache_create("lio_cmd_cache", | |
502 | sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd), | |
503 | 0, NULL); | |
504 | if (!lio_cmd_cache) { | |
505 | pr_err("Unable to kmem_cache_create() for" | |
506 | " lio_cmd_cache\n"); | |
507 | goto ts_out2; | |
508 | } | |
509 | ||
510 | lio_qr_cache = kmem_cache_create("lio_qr_cache", | |
511 | sizeof(struct iscsi_queue_req), | |
512 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
513 | if (!lio_qr_cache) { | |
514 | pr_err("nable to kmem_cache_create() for" | |
515 | " lio_qr_cache\n"); | |
516 | goto cmd_out; | |
517 | } | |
518 | ||
519 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
520 | sizeof(struct iscsi_datain_req), | |
521 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
522 | if (!lio_dr_cache) { | |
523 | pr_err("Unable to kmem_cache_create() for" | |
524 | " lio_dr_cache\n"); | |
525 | goto qr_out; | |
526 | } | |
527 | ||
528 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
529 | sizeof(struct iscsi_ooo_cmdsn), | |
530 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
531 | if (!lio_ooo_cache) { | |
532 | pr_err("Unable to kmem_cache_create() for" | |
533 | " lio_ooo_cache\n"); | |
534 | goto dr_out; | |
535 | } | |
536 | ||
537 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
538 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
539 | 0, NULL); | |
540 | if (!lio_r2t_cache) { | |
541 | pr_err("Unable to kmem_cache_create() for" | |
542 | " lio_r2t_cache\n"); | |
543 | goto ooo_out; | |
544 | } | |
545 | ||
546 | if (iscsit_load_discovery_tpg() < 0) | |
547 | goto r2t_out; | |
548 | ||
549 | return ret; | |
550 | r2t_out: | |
551 | kmem_cache_destroy(lio_r2t_cache); | |
552 | ooo_out: | |
553 | kmem_cache_destroy(lio_ooo_cache); | |
554 | dr_out: | |
555 | kmem_cache_destroy(lio_dr_cache); | |
556 | qr_out: | |
557 | kmem_cache_destroy(lio_qr_cache); | |
558 | cmd_out: | |
559 | kmem_cache_destroy(lio_cmd_cache); | |
560 | ts_out2: | |
561 | iscsi_deallocate_thread_sets(); | |
562 | ts_out1: | |
563 | iscsi_thread_set_free(); | |
564 | configfs_out: | |
565 | iscsi_target_deregister_configfs(); | |
566 | out: | |
567 | kfree(iscsit_global); | |
568 | return -ENOMEM; | |
569 | } | |
570 | ||
571 | static void __exit iscsi_target_cleanup_module(void) | |
572 | { | |
573 | iscsi_deallocate_thread_sets(); | |
574 | iscsi_thread_set_free(); | |
575 | iscsit_release_discovery_tpg(); | |
576 | kmem_cache_destroy(lio_cmd_cache); | |
577 | kmem_cache_destroy(lio_qr_cache); | |
578 | kmem_cache_destroy(lio_dr_cache); | |
579 | kmem_cache_destroy(lio_ooo_cache); | |
580 | kmem_cache_destroy(lio_r2t_cache); | |
581 | ||
582 | iscsi_target_deregister_configfs(); | |
583 | ||
584 | kfree(iscsit_global); | |
585 | } | |
586 | ||
8b1e1244 | 587 | static int iscsit_add_reject( |
e48354ce NB |
588 | u8 reason, |
589 | int fail_conn, | |
590 | unsigned char *buf, | |
591 | struct iscsi_conn *conn) | |
592 | { | |
593 | struct iscsi_cmd *cmd; | |
594 | struct iscsi_reject *hdr; | |
595 | int ret; | |
596 | ||
597 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
598 | if (!cmd) | |
599 | return -1; | |
600 | ||
601 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
602 | if (fail_conn) | |
603 | cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; | |
604 | ||
605 | hdr = (struct iscsi_reject *) cmd->pdu; | |
606 | hdr->reason = reason; | |
607 | ||
1c3d5794 | 608 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
609 | if (!cmd->buf_ptr) { |
610 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
611 | iscsit_release_cmd(cmd); | |
612 | return -1; | |
613 | } | |
e48354ce NB |
614 | |
615 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 616 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
617 | spin_unlock_bh(&conn->cmd_lock); |
618 | ||
619 | cmd->i_state = ISTATE_SEND_REJECT; | |
620 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
621 | ||
622 | ret = wait_for_completion_interruptible(&cmd->reject_comp); | |
623 | if (ret != 0) | |
624 | return -1; | |
625 | ||
626 | return (!fail_conn) ? 0 : -1; | |
627 | } | |
628 | ||
629 | int iscsit_add_reject_from_cmd( | |
630 | u8 reason, | |
631 | int fail_conn, | |
632 | int add_to_conn, | |
633 | unsigned char *buf, | |
634 | struct iscsi_cmd *cmd) | |
635 | { | |
636 | struct iscsi_conn *conn; | |
637 | struct iscsi_reject *hdr; | |
638 | int ret; | |
639 | ||
640 | if (!cmd->conn) { | |
641 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
642 | cmd->init_task_tag); | |
643 | return -1; | |
644 | } | |
645 | conn = cmd->conn; | |
646 | ||
647 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
648 | if (fail_conn) | |
649 | cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; | |
650 | ||
651 | hdr = (struct iscsi_reject *) cmd->pdu; | |
652 | hdr->reason = reason; | |
653 | ||
1c3d5794 | 654 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
655 | if (!cmd->buf_ptr) { |
656 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
657 | iscsit_release_cmd(cmd); | |
658 | return -1; | |
659 | } | |
e48354ce NB |
660 | |
661 | if (add_to_conn) { | |
662 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 663 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
664 | spin_unlock_bh(&conn->cmd_lock); |
665 | } | |
666 | ||
667 | cmd->i_state = ISTATE_SEND_REJECT; | |
668 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
669 | ||
670 | ret = wait_for_completion_interruptible(&cmd->reject_comp); | |
671 | if (ret != 0) | |
672 | return -1; | |
673 | ||
674 | return (!fail_conn) ? 0 : -1; | |
675 | } | |
676 | ||
677 | /* | |
678 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 679 | * kernel sockets to copy data in/out. |
e48354ce NB |
680 | */ |
681 | static int iscsit_map_iovec( | |
682 | struct iscsi_cmd *cmd, | |
683 | struct kvec *iov, | |
684 | u32 data_offset, | |
685 | u32 data_length) | |
686 | { | |
687 | u32 i = 0; | |
688 | struct scatterlist *sg; | |
689 | unsigned int page_off; | |
690 | ||
691 | /* | |
bfb79eac | 692 | * We know each entry in t_data_sg contains a page. |
e48354ce | 693 | */ |
bfb79eac | 694 | sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; |
e48354ce NB |
695 | page_off = (data_offset % PAGE_SIZE); |
696 | ||
697 | cmd->first_data_sg = sg; | |
698 | cmd->first_data_sg_off = page_off; | |
699 | ||
700 | while (data_length) { | |
701 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
702 | ||
703 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
704 | iov[i].iov_len = cur_len; | |
705 | ||
706 | data_length -= cur_len; | |
707 | page_off = 0; | |
708 | sg = sg_next(sg); | |
709 | i++; | |
710 | } | |
711 | ||
712 | cmd->kmapped_nents = i; | |
713 | ||
714 | return i; | |
715 | } | |
716 | ||
717 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
718 | { | |
719 | u32 i; | |
720 | struct scatterlist *sg; | |
721 | ||
722 | sg = cmd->first_data_sg; | |
723 | ||
724 | for (i = 0; i < cmd->kmapped_nents; i++) | |
725 | kunmap(sg_page(&sg[i])); | |
726 | } | |
727 | ||
728 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
729 | { | |
730 | struct iscsi_cmd *cmd; | |
731 | ||
732 | conn->exp_statsn = exp_statsn; | |
733 | ||
734 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 735 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
736 | spin_lock(&cmd->istate_lock); |
737 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 738 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
739 | cmd->i_state = ISTATE_REMOVE; |
740 | spin_unlock(&cmd->istate_lock); | |
741 | iscsit_add_cmd_to_immediate_queue(cmd, conn, | |
742 | cmd->i_state); | |
743 | continue; | |
744 | } | |
745 | spin_unlock(&cmd->istate_lock); | |
746 | } | |
747 | spin_unlock_bh(&conn->cmd_lock); | |
748 | } | |
749 | ||
750 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
751 | { | |
f80e8ed3 | 752 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 753 | |
c0427f15 | 754 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
755 | |
756 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
757 | if (!cmd->iov_data) { | |
758 | pr_err("Unable to allocate cmd->iov_data\n"); | |
759 | return -ENOMEM; | |
760 | } | |
761 | ||
762 | cmd->orig_iov_data_count = iov_count; | |
763 | return 0; | |
764 | } | |
765 | ||
e48354ce NB |
766 | static int iscsit_handle_scsi_cmd( |
767 | struct iscsi_conn *conn, | |
768 | unsigned char *buf) | |
769 | { | |
de103c93 CH |
770 | int data_direction, payload_length, cmdsn_ret = 0, immed_ret; |
771 | struct iscsi_cmd *cmd = NULL; | |
e48354ce | 772 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
773 | int iscsi_task_attr; |
774 | int sam_task_attr; | |
e48354ce NB |
775 | |
776 | spin_lock_bh(&conn->sess->session_stats_lock); | |
777 | conn->sess->cmd_pdus++; | |
778 | if (conn->sess->se_sess->se_node_acl) { | |
779 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
780 | conn->sess->se_sess->se_node_acl->num_cmds++; | |
781 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
782 | } | |
783 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
784 | ||
785 | hdr = (struct iscsi_scsi_req *) buf; | |
786 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
787 | |
788 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
789 | ||
790 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
791 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
792 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
793 | " not set. Bad iSCSI Initiator.\n"); | |
794 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
795 | buf, conn); | |
796 | } | |
797 | ||
798 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
799 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
800 | /* | |
801 | * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2) | |
802 | * that adds support for RESERVE/RELEASE. There is a bug | |
803 | * add with this new functionality that sets R/W bits when | |
804 | * neither CDB carries any READ or WRITE datapayloads. | |
805 | */ | |
806 | if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) { | |
807 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; | |
808 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
809 | goto done; | |
810 | } | |
811 | ||
812 | pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" | |
813 | " set when Expected Data Transfer Length is 0 for" | |
814 | " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]); | |
815 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
816 | buf, conn); | |
817 | } | |
818 | done: | |
819 | ||
820 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
821 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
822 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
823 | " MUST be set if Expected Data Transfer Length is not 0." | |
824 | " Bad iSCSI Initiator\n"); | |
825 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
826 | buf, conn); | |
827 | } | |
828 | ||
829 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
830 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
831 | pr_err("Bidirectional operations not supported!\n"); | |
832 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
833 | buf, conn); | |
834 | } | |
835 | ||
836 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
837 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
838 | " Scsi Command PDU.\n"); | |
839 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
840 | buf, conn); | |
841 | } | |
842 | ||
843 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
844 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
845 | " protocol error.\n", payload_length); | |
846 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
847 | buf, conn); | |
848 | } | |
849 | ||
50e5c87d | 850 | if ((be32_to_cpu(hdr->data_length )== payload_length) && |
e48354ce NB |
851 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
852 | pr_err("Expected Data Transfer Length and Length of" | |
853 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
854 | " bit is not set protocol error\n"); | |
855 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
856 | buf, conn); | |
857 | } | |
858 | ||
50e5c87d | 859 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
860 | pr_err("DataSegmentLength: %u is greater than" |
861 | " EDTL: %u, protocol error.\n", payload_length, | |
862 | hdr->data_length); | |
863 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
864 | buf, conn); | |
865 | } | |
866 | ||
21f5aa7e | 867 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 868 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
869 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
870 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
e48354ce NB |
871 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
872 | buf, conn); | |
873 | } | |
874 | ||
875 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
876 | pr_err("DataSegmentLength: %u is greater than" | |
877 | " FirstBurstLength: %u, protocol error.\n", | |
878 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
879 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
880 | buf, conn); | |
881 | } | |
882 | ||
883 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
884 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
885 | DMA_NONE; | |
886 | ||
d28b1169 | 887 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); |
e48354ce NB |
888 | if (!cmd) |
889 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, | |
d28b1169 AG |
890 | buf, conn); |
891 | ||
892 | cmd->data_direction = data_direction; | |
d28b1169 AG |
893 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
894 | /* | |
895 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
896 | */ | |
897 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
898 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
899 | sam_task_attr = MSG_SIMPLE_TAG; | |
900 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) | |
901 | sam_task_attr = MSG_ORDERED_TAG; | |
902 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) | |
903 | sam_task_attr = MSG_HEAD_TAG; | |
904 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) | |
905 | sam_task_attr = MSG_ACA_TAG; | |
906 | else { | |
907 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
908 | " MSG_SIMPLE_TAG\n", iscsi_task_attr); | |
909 | sam_task_attr = MSG_SIMPLE_TAG; | |
910 | } | |
911 | ||
e48354ce NB |
912 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
913 | cmd->i_state = ISTATE_NEW_CMD; | |
914 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
915 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
916 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
917 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
918 | if (cmd->unsolicited_data) | |
919 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
920 | ||
921 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
922 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { | |
923 | spin_lock_bh(&conn->sess->ttt_lock); | |
924 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
925 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
926 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
927 | spin_unlock_bh(&conn->sess->ttt_lock); | |
928 | } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) | |
929 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
930 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
931 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
932 | cmd->first_burst_len = payload_length; |
933 | ||
934 | if (cmd->data_direction == DMA_FROM_DEVICE) { | |
935 | struct iscsi_datain_req *dr; | |
936 | ||
937 | dr = iscsit_allocate_datain_req(); | |
938 | if (!dr) | |
939 | return iscsit_add_reject_from_cmd( | |
940 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
941 | 1, 1, buf, cmd); | |
942 | ||
943 | iscsit_attach_datain_req(cmd, dr); | |
944 | } | |
945 | ||
065ca1e4 AG |
946 | /* |
947 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
948 | */ | |
949 | transport_init_se_cmd(&cmd->se_cmd, &lio_target_fabric_configfs->tf_ops, | |
50e5c87d CH |
950 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
951 | cmd->data_direction, sam_task_attr, | |
952 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
953 | |
954 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
955 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
956 | hdr->cmdsn, hdr->data_length, payload_length, conn->cid); | |
957 | ||
de103c93 CH |
958 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
959 | scsilun_to_int(&hdr->lun)); | |
960 | if (cmd->sense_reason) | |
961 | goto attach_cmd; | |
962 | ||
963 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); | |
964 | if (cmd->sense_reason) { | |
965 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
966 | return iscsit_add_reject_from_cmd( | |
967 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
968 | 1, 1, buf, cmd); | |
e48354ce | 969 | } |
de103c93 | 970 | |
e48354ce NB |
971 | goto attach_cmd; |
972 | } | |
a12f41f8 | 973 | |
de103c93 | 974 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
e48354ce | 975 | return iscsit_add_reject_from_cmd( |
de103c93 CH |
976 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, |
977 | 1, 1, buf, cmd); | |
e48354ce NB |
978 | } |
979 | ||
980 | attach_cmd: | |
981 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 982 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
983 | spin_unlock_bh(&conn->cmd_lock); |
984 | /* | |
985 | * Check if we need to delay processing because of ALUA | |
986 | * Active/NonOptimized primary access state.. | |
987 | */ | |
988 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 989 | |
de103c93 | 990 | if (iscsit_allocate_iovecs(cmd) < 0) { |
e48354ce NB |
991 | return iscsit_add_reject_from_cmd( |
992 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
cd931ee6 | 993 | 1, 0, buf, cmd); |
de103c93 CH |
994 | } |
995 | ||
e48354ce NB |
996 | /* |
997 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
998 | * the Immediate Bit is not set, and no Immediate | |
999 | * Data is attached. | |
1000 | * | |
1001 | * A PDU/CmdSN carrying Immediate Data can only | |
1002 | * be processed after the DataCRC has passed. | |
1003 | * If the DataCRC fails, the CmdSN MUST NOT | |
1004 | * be acknowledged. (See below) | |
1005 | */ | |
1006 | if (!cmd->immediate_data) { | |
1007 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
7e32da55 NB |
1008 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1009 | return 0; | |
1010 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
e48354ce NB |
1011 | return iscsit_add_reject_from_cmd( |
1012 | ISCSI_REASON_PROTOCOL_ERROR, | |
1013 | 1, 0, buf, cmd); | |
1014 | } | |
1015 | ||
50e5c87d | 1016 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1017 | |
1018 | /* | |
1019 | * If no Immediate Data is attached, it's OK to return now. | |
1020 | */ | |
1021 | if (!cmd->immediate_data) { | |
de103c93 | 1022 | if (!cmd->sense_reason && cmd->unsolicited_data) { |
e48354ce NB |
1023 | iscsit_set_dataout_sequence_values(cmd); |
1024 | ||
1025 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1026 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1027 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1028 | } | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Early CHECK_CONDITIONs never make it to the transport processing | |
1035 | * thread. They are processed in CmdSN order by | |
1036 | * iscsit_check_received_cmdsn() below. | |
1037 | */ | |
de103c93 | 1038 | if (cmd->sense_reason) { |
e48354ce | 1039 | immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; |
e48354ce NB |
1040 | goto after_immediate_data; |
1041 | } | |
1042 | /* | |
1043 | * Call directly into transport_generic_new_cmd() to perform | |
1044 | * the backend memory allocation. | |
1045 | */ | |
de103c93 CH |
1046 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
1047 | if (cmd->sense_reason) { | |
e48354ce | 1048 | immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; |
e48354ce NB |
1049 | goto after_immediate_data; |
1050 | } | |
1051 | ||
1052 | immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length); | |
1053 | after_immediate_data: | |
1054 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1055 | /* | |
1056 | * A PDU/CmdSN carrying Immediate Data passed | |
1057 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1058 | * Immediate Bit is not set. | |
1059 | */ | |
1060 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1061 | /* | |
1062 | * Special case for Unsupported SAM WRITE Opcodes | |
1063 | * and ImmediateData=Yes. | |
1064 | */ | |
de103c93 | 1065 | if (cmd->sense_reason) { |
e48354ce NB |
1066 | if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) |
1067 | return -1; | |
1068 | } else if (cmd->unsolicited_data) { | |
1069 | iscsit_set_dataout_sequence_values(cmd); | |
1070 | ||
1071 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1072 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1073 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1074 | } | |
1075 | ||
1076 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1077 | return iscsit_add_reject_from_cmd( | |
1078 | ISCSI_REASON_PROTOCOL_ERROR, | |
1079 | 1, 0, buf, cmd); | |
1080 | ||
1081 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { | |
1082 | /* | |
1083 | * Immediate Data failed DataCRC and ERL>=1, | |
1084 | * silently drop this PDU and let the initiator | |
1085 | * plug the CmdSN gap. | |
1086 | * | |
1087 | * FIXME: Send Unsolicited NOPIN with reserved | |
1088 | * TTT here to help the initiator figure out | |
1089 | * the missing CmdSN, although they should be | |
1090 | * intelligent enough to determine the missing | |
1091 | * CmdSN and issue a retry to plug the sequence. | |
1092 | */ | |
1093 | cmd->i_state = ISTATE_REMOVE; | |
1094 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
1095 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ | |
1096 | return -1; | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static u32 iscsit_do_crypto_hash_sg( | |
1102 | struct hash_desc *hash, | |
1103 | struct iscsi_cmd *cmd, | |
1104 | u32 data_offset, | |
1105 | u32 data_length, | |
1106 | u32 padding, | |
1107 | u8 *pad_bytes) | |
1108 | { | |
1109 | u32 data_crc; | |
1110 | u32 i; | |
1111 | struct scatterlist *sg; | |
1112 | unsigned int page_off; | |
1113 | ||
1114 | crypto_hash_init(hash); | |
1115 | ||
1116 | sg = cmd->first_data_sg; | |
1117 | page_off = cmd->first_data_sg_off; | |
1118 | ||
1119 | i = 0; | |
1120 | while (data_length) { | |
1121 | u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); | |
1122 | ||
1123 | crypto_hash_update(hash, &sg[i], cur_len); | |
1124 | ||
1125 | data_length -= cur_len; | |
1126 | page_off = 0; | |
1127 | i++; | |
1128 | } | |
1129 | ||
1130 | if (padding) { | |
1131 | struct scatterlist pad_sg; | |
1132 | ||
1133 | sg_init_one(&pad_sg, pad_bytes, padding); | |
1134 | crypto_hash_update(hash, &pad_sg, padding); | |
1135 | } | |
1136 | crypto_hash_final(hash, (u8 *) &data_crc); | |
1137 | ||
1138 | return data_crc; | |
1139 | } | |
1140 | ||
1141 | static void iscsit_do_crypto_hash_buf( | |
1142 | struct hash_desc *hash, | |
1143 | unsigned char *buf, | |
1144 | u32 payload_length, | |
1145 | u32 padding, | |
1146 | u8 *pad_bytes, | |
1147 | u8 *data_crc) | |
1148 | { | |
1149 | struct scatterlist sg; | |
1150 | ||
1151 | crypto_hash_init(hash); | |
1152 | ||
8359cf43 | 1153 | sg_init_one(&sg, buf, payload_length); |
e48354ce NB |
1154 | crypto_hash_update(hash, &sg, payload_length); |
1155 | ||
1156 | if (padding) { | |
1157 | sg_init_one(&sg, pad_bytes, padding); | |
1158 | crypto_hash_update(hash, &sg, padding); | |
1159 | } | |
1160 | crypto_hash_final(hash, data_crc); | |
1161 | } | |
1162 | ||
1163 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) | |
1164 | { | |
1165 | int iov_ret, ooo_cmdsn = 0, ret; | |
1166 | u8 data_crc_failed = 0; | |
1167 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0; | |
1168 | u32 rx_size = 0, payload_length; | |
1169 | struct iscsi_cmd *cmd = NULL; | |
1170 | struct se_cmd *se_cmd; | |
1171 | struct iscsi_data *hdr; | |
1172 | struct kvec *iov; | |
1173 | unsigned long flags; | |
1174 | ||
1175 | hdr = (struct iscsi_data *) buf; | |
1176 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
1177 | |
1178 | if (!payload_length) { | |
1179 | pr_err("DataOUT payload is ZERO, protocol error.\n"); | |
1180 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1181 | buf, conn); | |
1182 | } | |
1183 | ||
1184 | /* iSCSI write */ | |
1185 | spin_lock_bh(&conn->sess->session_stats_lock); | |
1186 | conn->sess->rx_data_octets += payload_length; | |
1187 | if (conn->sess->se_sess->se_node_acl) { | |
1188 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
1189 | conn->sess->se_sess->se_node_acl->write_bytes += payload_length; | |
1190 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
1191 | } | |
1192 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
1193 | ||
21f5aa7e | 1194 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1195 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1196 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1197 | conn->conn_ops->MaxXmitDataSegmentLength); | |
e48354ce NB |
1198 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
1199 | buf, conn); | |
1200 | } | |
1201 | ||
1202 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1203 | payload_length); | |
1204 | if (!cmd) | |
1205 | return 0; | |
1206 | ||
1207 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1208 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
1209 | hdr->itt, hdr->ttt, hdr->datasn, hdr->offset, | |
1210 | payload_length, conn->cid); | |
1211 | ||
1212 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1213 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1214 | " last DataOUT received, dumping payload\n", | |
1215 | cmd->init_task_tag); | |
1216 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1217 | } | |
1218 | ||
1219 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1220 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1221 | " NON-WRITE command.\n", cmd->init_task_tag); | |
1222 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, | |
1223 | 1, 0, buf, cmd); | |
1224 | } | |
1225 | se_cmd = &cmd->se_cmd; | |
1226 | iscsit_mod_dataout_timer(cmd); | |
1227 | ||
50e5c87d | 1228 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1229 | pr_err("DataOut Offset: %u, Length %u greater than" |
1230 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1231 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
e48354ce NB |
1232 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
1233 | 1, 0, buf, cmd); | |
1234 | } | |
1235 | ||
1236 | if (cmd->unsolicited_data) { | |
1237 | int dump_unsolicited_data = 0; | |
1238 | ||
1239 | if (conn->sess->sess_ops->InitialR2T) { | |
1240 | pr_err("Received unexpected unsolicited data" | |
1241 | " while InitialR2T=Yes, protocol error.\n"); | |
1242 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1243 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1244 | return -1; | |
1245 | } | |
1246 | /* | |
1247 | * Special case for dealing with Unsolicited DataOUT | |
1248 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1249 | * failures; | |
1250 | */ | |
1251 | ||
1252 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
1253 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); | |
1254 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); | |
1255 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); | |
1256 | ||
1257 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); | |
de103c93 | 1258 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce NB |
1259 | dump_unsolicited_data = 1; |
1260 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); | |
1261 | ||
1262 | if (dump_unsolicited_data) { | |
1263 | /* | |
1264 | * Check if a delayed TASK_ABORTED status needs to | |
1265 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
1266 | * received with the unsolicitied data out. | |
1267 | */ | |
1268 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1269 | iscsit_stop_dataout_timer(cmd); | |
1270 | ||
1271 | transport_check_aborted_status(se_cmd, | |
1272 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1273 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1274 | } | |
1275 | } else { | |
1276 | /* | |
1277 | * For the normal solicited data path: | |
1278 | * | |
1279 | * Check for a delayed TASK_ABORTED status and dump any | |
1280 | * incoming data out payload if one exists. Also, when the | |
1281 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1282 | * data out sequence, we decrement outstanding_r2ts. Once | |
1283 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1284 | * TASK_ABORTED status. | |
1285 | */ | |
7d680f3b | 1286 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1287 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1288 | if (--cmd->outstanding_r2ts < 1) { | |
1289 | iscsit_stop_dataout_timer(cmd); | |
1290 | transport_check_aborted_status( | |
1291 | se_cmd, 1); | |
1292 | } | |
1293 | ||
1294 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1295 | } | |
1296 | } | |
1297 | /* | |
1298 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1299 | * within-command recovery checks before receiving the payload. | |
1300 | */ | |
1301 | ret = iscsit_check_pre_dataout(cmd, buf); | |
1302 | if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
1303 | return 0; | |
1304 | else if (ret == DATAOUT_CANNOT_RECOVER) | |
1305 | return -1; | |
1306 | ||
1307 | rx_size += payload_length; | |
1308 | iov = &cmd->iov_data[0]; | |
1309 | ||
50e5c87d CH |
1310 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1311 | payload_length); | |
e48354ce NB |
1312 | if (iov_ret < 0) |
1313 | return -1; | |
1314 | ||
1315 | iov_count += iov_ret; | |
1316 | ||
1317 | padding = ((-payload_length) & 3); | |
1318 | if (padding != 0) { | |
1319 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1320 | iov[iov_count++].iov_len = padding; | |
1321 | rx_size += padding; | |
1322 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1323 | } | |
1324 | ||
1325 | if (conn->conn_ops->DataDigest) { | |
1326 | iov[iov_count].iov_base = &checksum; | |
1327 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1328 | rx_size += ISCSI_CRC_LEN; | |
1329 | } | |
1330 | ||
1331 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1332 | ||
1333 | iscsit_unmap_iovec(cmd); | |
1334 | ||
1335 | if (rx_got != rx_size) | |
1336 | return -1; | |
1337 | ||
1338 | if (conn->conn_ops->DataDigest) { | |
1339 | u32 data_crc; | |
1340 | ||
1341 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
50e5c87d CH |
1342 | be32_to_cpu(hdr->offset), |
1343 | payload_length, padding, | |
e48354ce NB |
1344 | cmd->pad_bytes); |
1345 | ||
1346 | if (checksum != data_crc) { | |
1347 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1348 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1349 | " does not match computed 0x%08x\n", | |
1350 | hdr->itt, hdr->offset, payload_length, | |
1351 | hdr->datasn, checksum, data_crc); | |
1352 | data_crc_failed = 1; | |
1353 | } else { | |
1354 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1355 | " %u bytes of Data Out\n", checksum, | |
1356 | payload_length); | |
1357 | } | |
1358 | } | |
1359 | /* | |
1360 | * Increment post receive data and CRC values or perform | |
1361 | * within-command recovery. | |
1362 | */ | |
1363 | ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed); | |
1364 | if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
1365 | return 0; | |
1366 | else if (ret == DATAOUT_SEND_R2T) { | |
1367 | iscsit_set_dataout_sequence_values(cmd); | |
8b1e1244 | 1368 | iscsit_build_r2ts_for_cmd(cmd, conn, false); |
e48354ce NB |
1369 | } else if (ret == DATAOUT_SEND_TO_TRANSPORT) { |
1370 | /* | |
1371 | * Handle extra special case for out of order | |
1372 | * Unsolicited Data Out. | |
1373 | */ | |
1374 | spin_lock_bh(&cmd->istate_lock); | |
1375 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1376 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1377 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1378 | spin_unlock_bh(&cmd->istate_lock); | |
1379 | ||
1380 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1381 | if (ooo_cmdsn) |
1382 | return 0; | |
1383 | target_execute_cmd(&cmd->se_cmd); | |
1384 | return 0; | |
e48354ce NB |
1385 | } else /* DATAOUT_CANNOT_RECOVER */ |
1386 | return -1; | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | static int iscsit_handle_nop_out( | |
1392 | struct iscsi_conn *conn, | |
1393 | unsigned char *buf) | |
1394 | { | |
1395 | unsigned char *ping_data = NULL; | |
1396 | int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size; | |
1397 | u32 checksum, data_crc, padding = 0, payload_length; | |
e48354ce NB |
1398 | struct iscsi_cmd *cmd = NULL; |
1399 | struct kvec *iov = NULL; | |
1400 | struct iscsi_nopout *hdr; | |
1401 | ||
1402 | hdr = (struct iscsi_nopout *) buf; | |
1403 | payload_length = ntoh24(hdr->dlength); | |
e48354ce | 1404 | |
66c7db68 | 1405 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1406 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1407 | " not set, protocol error.\n"); | |
1408 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1409 | buf, conn); | |
1410 | } | |
1411 | ||
21f5aa7e | 1412 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1413 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1414 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1415 | " error.\n", payload_length, |
21f5aa7e | 1416 | conn->conn_ops->MaxXmitDataSegmentLength); |
e48354ce NB |
1417 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
1418 | buf, conn); | |
1419 | } | |
1420 | ||
1421 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x," | |
1422 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", | |
66c7db68 | 1423 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1424 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1425 | payload_length); | |
1426 | /* | |
1427 | * This is not a response to a Unsolicited NopIN, which means | |
1428 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1429 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1430 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1431 | * can contain ping data. | |
1432 | */ | |
50e5c87d | 1433 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1434 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); |
1435 | if (!cmd) | |
1436 | return iscsit_add_reject( | |
1437 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1438 | 1, buf, conn); | |
1439 | ||
1440 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; | |
1441 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1442 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1443 | 1 : 0); | |
1444 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1445 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1446 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1447 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1448 | cmd->data_direction = DMA_NONE; |
1449 | } | |
1450 | ||
50e5c87d | 1451 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1452 | rx_size = payload_length; |
1453 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); | |
1454 | if (!ping_data) { | |
1455 | pr_err("Unable to allocate memory for" | |
1456 | " NOPOUT ping data.\n"); | |
1457 | ret = -1; | |
1458 | goto out; | |
1459 | } | |
1460 | ||
1461 | iov = &cmd->iov_misc[0]; | |
1462 | iov[niov].iov_base = ping_data; | |
1463 | iov[niov++].iov_len = payload_length; | |
1464 | ||
1465 | padding = ((-payload_length) & 3); | |
1466 | if (padding != 0) { | |
1467 | pr_debug("Receiving %u additional bytes" | |
1468 | " for padding.\n", padding); | |
1469 | iov[niov].iov_base = &cmd->pad_bytes; | |
1470 | iov[niov++].iov_len = padding; | |
1471 | rx_size += padding; | |
1472 | } | |
1473 | if (conn->conn_ops->DataDigest) { | |
1474 | iov[niov].iov_base = &checksum; | |
1475 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1476 | rx_size += ISCSI_CRC_LEN; | |
1477 | } | |
1478 | ||
1479 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1480 | if (rx_got != rx_size) { | |
1481 | ret = -1; | |
1482 | goto out; | |
1483 | } | |
1484 | ||
1485 | if (conn->conn_ops->DataDigest) { | |
1486 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1487 | ping_data, payload_length, | |
1488 | padding, cmd->pad_bytes, | |
1489 | (u8 *)&data_crc); | |
1490 | ||
1491 | if (checksum != data_crc) { | |
1492 | pr_err("Ping data CRC32C DataDigest" | |
1493 | " 0x%08x does not match computed 0x%08x\n", | |
1494 | checksum, data_crc); | |
1495 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1496 | pr_err("Unable to recover from" | |
1497 | " NOPOUT Ping DataCRC failure while in" | |
1498 | " ERL=0.\n"); | |
1499 | ret = -1; | |
1500 | goto out; | |
1501 | } else { | |
1502 | /* | |
1503 | * Silently drop this PDU and let the | |
1504 | * initiator plug the CmdSN gap. | |
1505 | */ | |
1506 | pr_debug("Dropping NOPOUT" | |
1507 | " Command CmdSN: 0x%08x due to" | |
1508 | " DataCRC error.\n", hdr->cmdsn); | |
1509 | ret = 0; | |
1510 | goto out; | |
1511 | } | |
1512 | } else { | |
1513 | pr_debug("Got CRC32C DataDigest" | |
1514 | " 0x%08x for %u bytes of ping data.\n", | |
1515 | checksum, payload_length); | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | ping_data[payload_length] = '\0'; | |
1520 | /* | |
1521 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1522 | */ | |
8359cf43 | 1523 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1524 | cmd->buf_ptr_size = payload_length; |
1525 | ||
1526 | pr_debug("Got %u bytes of NOPOUT ping" | |
1527 | " data.\n", payload_length); | |
1528 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1529 | } | |
1530 | ||
66c7db68 | 1531 | if (hdr->itt != RESERVED_ITT) { |
e48354ce NB |
1532 | if (!cmd) { |
1533 | pr_err("Checking CmdSN for NOPOUT," | |
1534 | " but cmd is NULL!\n"); | |
1535 | return -1; | |
1536 | } | |
1537 | /* | |
1538 | * Initiator is expecting a NopIN ping reply, | |
1539 | */ | |
1540 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1541 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1542 | spin_unlock_bh(&conn->cmd_lock); |
1543 | ||
50e5c87d | 1544 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1545 | |
1546 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1547 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1548 | cmd->i_state); | |
1549 | return 0; | |
1550 | } | |
1551 | ||
1552 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1553 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
1554 | ret = 0; | |
1555 | goto ping_out; | |
1556 | } | |
1557 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1558 | return iscsit_add_reject_from_cmd( | |
1559 | ISCSI_REASON_PROTOCOL_ERROR, | |
1560 | 1, 0, buf, cmd); | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
50e5c87d | 1565 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1566 | /* |
1567 | * This was a response to a unsolicited NOPIN ping. | |
1568 | */ | |
50e5c87d | 1569 | cmd = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); |
e48354ce NB |
1570 | if (!cmd) |
1571 | return -1; | |
1572 | ||
1573 | iscsit_stop_nopin_response_timer(conn); | |
1574 | ||
1575 | cmd->i_state = ISTATE_REMOVE; | |
1576 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
1577 | iscsit_start_nopin_timer(conn); | |
1578 | } else { | |
1579 | /* | |
1580 | * Initiator is not expecting a NOPIN is response. | |
1581 | * Just ignore for now. | |
1582 | * | |
1583 | * iSCSI v19-91 10.18 | |
1584 | * "A NOP-OUT may also be used to confirm a changed | |
1585 | * ExpStatSN if another PDU will not be available | |
1586 | * for a long time." | |
1587 | */ | |
1588 | ret = 0; | |
1589 | goto out; | |
1590 | } | |
1591 | ||
1592 | return 0; | |
1593 | out: | |
1594 | if (cmd) | |
1595 | iscsit_release_cmd(cmd); | |
1596 | ping_out: | |
1597 | kfree(ping_data); | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | static int iscsit_handle_task_mgt_cmd( | |
1602 | struct iscsi_conn *conn, | |
1603 | unsigned char *buf) | |
1604 | { | |
1605 | struct iscsi_cmd *cmd; | |
1606 | struct se_tmr_req *se_tmr; | |
1607 | struct iscsi_tmr_req *tmr_req; | |
1608 | struct iscsi_tm *hdr; | |
e48354ce NB |
1609 | int out_of_order_cmdsn = 0; |
1610 | int ret; | |
1611 | u8 function; | |
1612 | ||
1613 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1614 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1615 | function = hdr->flags; | |
1616 | ||
1617 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1618 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1619 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1620 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1621 | ||
1622 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1623 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1624 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1625 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1626 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1627 | } |
1628 | ||
1629 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1630 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1631 | pr_err("Task Management Request TASK_REASSIGN not" | |
1632 | " issued as immediate command, bad iSCSI Initiator" | |
1633 | "implementation\n"); | |
1634 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1635 | buf, conn); | |
1636 | } | |
1637 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1638 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1639 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1640 | |
d28b1169 | 1641 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); |
e48354ce NB |
1642 | if (!cmd) |
1643 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
d28b1169 AG |
1644 | 1, buf, conn); |
1645 | ||
1646 | cmd->data_direction = DMA_NONE; | |
1647 | ||
1648 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1649 | if (!cmd->tmr_req) { | |
1650 | pr_err("Unable to allocate memory for" | |
1651 | " Task Management command!\n"); | |
1652 | return iscsit_add_reject_from_cmd( | |
1653 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1654 | 1, 1, buf, cmd); | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1659 | * LIO-Target $FABRIC_MOD | |
1660 | */ | |
1661 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1662 | ||
1663 | u8 tcm_function; | |
1664 | int ret; | |
1665 | ||
1666 | transport_init_se_cmd(&cmd->se_cmd, | |
1667 | &lio_target_fabric_configfs->tf_ops, | |
1668 | conn->sess->se_sess, 0, DMA_NONE, | |
9c58b7dd | 1669 | MSG_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 AG |
1670 | |
1671 | switch (function) { | |
1672 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1673 | tcm_function = TMR_ABORT_TASK; | |
1674 | break; | |
1675 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1676 | tcm_function = TMR_ABORT_TASK_SET; | |
1677 | break; | |
1678 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1679 | tcm_function = TMR_CLEAR_ACA; | |
1680 | break; | |
1681 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1682 | tcm_function = TMR_CLEAR_TASK_SET; | |
1683 | break; | |
1684 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1685 | tcm_function = TMR_LUN_RESET; | |
1686 | break; | |
1687 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1688 | tcm_function = TMR_TARGET_WARM_RESET; | |
1689 | break; | |
1690 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1691 | tcm_function = TMR_TARGET_COLD_RESET; | |
1692 | break; | |
1693 | default: | |
1694 | pr_err("Unknown iSCSI TMR Function:" | |
1695 | " 0x%02x\n", function); | |
1696 | return iscsit_add_reject_from_cmd( | |
1697 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1698 | 1, 1, buf, cmd); | |
1699 | } | |
1700 | ||
1701 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
1702 | tcm_function, GFP_KERNEL); | |
1703 | if (ret < 0) | |
1704 | return iscsit_add_reject_from_cmd( | |
1705 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1706 | 1, 1, buf, cmd); | |
1707 | ||
1708 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
1709 | } | |
e48354ce NB |
1710 | |
1711 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
1712 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
1713 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1714 | cmd->init_task_tag = hdr->itt; | |
1715 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1716 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1717 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1718 | se_tmr = cmd->se_cmd.se_tmr_req; |
1719 | tmr_req = cmd->tmr_req; | |
1720 | /* | |
1721 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
1722 | */ | |
1723 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
1724 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
1725 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 1726 | if (ret < 0) { |
e48354ce NB |
1727 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
1728 | goto attach; | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | switch (function) { | |
1733 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1734 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 1735 | if (se_tmr->response) |
e48354ce | 1736 | goto attach; |
e48354ce NB |
1737 | break; |
1738 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1739 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1740 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1741 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1742 | break; | |
1743 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1744 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1745 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1746 | goto attach; | |
1747 | } | |
1748 | break; | |
1749 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1750 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1751 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1752 | goto attach; | |
1753 | } | |
1754 | break; | |
1755 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
1756 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
1757 | /* | |
1758 | * Perform sanity checks on the ExpDataSN only if the | |
1759 | * TASK_REASSIGN was successful. | |
1760 | */ | |
de103c93 | 1761 | if (se_tmr->response) |
e48354ce NB |
1762 | break; |
1763 | ||
1764 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
1765 | return iscsit_add_reject_from_cmd( | |
1766 | ISCSI_REASON_BOOKMARK_INVALID, 1, 1, | |
1767 | buf, cmd); | |
1768 | break; | |
1769 | default: | |
1770 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
1771 | " error.\n", function); | |
e48354ce NB |
1772 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
1773 | goto attach; | |
1774 | } | |
1775 | ||
1776 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1777 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
1778 | se_tmr->call_transport = 1; | |
1779 | attach: | |
1780 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1781 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1782 | spin_unlock_bh(&conn->cmd_lock); |
1783 | ||
1784 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1785 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1786 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) | |
1787 | out_of_order_cmdsn = 1; | |
5a4c8666 | 1788 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 1789 | return 0; |
5a4c8666 | 1790 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
e48354ce NB |
1791 | return iscsit_add_reject_from_cmd( |
1792 | ISCSI_REASON_PROTOCOL_ERROR, | |
1793 | 1, 0, buf, cmd); | |
e48354ce | 1794 | } |
50e5c87d | 1795 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 1796 | |
5a4c8666 | 1797 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
1798 | return 0; |
1799 | /* | |
1800 | * Found the referenced task, send to transport for processing. | |
1801 | */ | |
1802 | if (se_tmr->call_transport) | |
1803 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
1804 | ||
1805 | /* | |
1806 | * Could not find the referenced LUN, task, or Task Management | |
1807 | * command not authorized or supported. Change state and | |
1808 | * let the tx_thread send the response. | |
1809 | * | |
1810 | * For connection recovery, this is also the default action for | |
1811 | * TMR TASK_REASSIGN. | |
1812 | */ | |
1813 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
1814 | return 0; | |
1815 | } | |
1816 | ||
1817 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
1818 | static int iscsit_handle_text_cmd( | |
1819 | struct iscsi_conn *conn, | |
1820 | unsigned char *buf) | |
1821 | { | |
1822 | char *text_ptr, *text_in; | |
1823 | int cmdsn_ret, niov = 0, rx_got, rx_size; | |
1824 | u32 checksum = 0, data_crc = 0, payload_length; | |
76f1928e | 1825 | u32 padding = 0, pad_bytes = 0, text_length = 0; |
e48354ce NB |
1826 | struct iscsi_cmd *cmd; |
1827 | struct kvec iov[3]; | |
1828 | struct iscsi_text *hdr; | |
1829 | ||
1830 | hdr = (struct iscsi_text *) buf; | |
1831 | payload_length = ntoh24(hdr->dlength); | |
e48354ce | 1832 | |
21f5aa7e | 1833 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1834 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
1835 | "greater than MaxXmitDataSegmentLength %u.\n", |
1836 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
e48354ce NB |
1837 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
1838 | buf, conn); | |
1839 | } | |
1840 | ||
1841 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," | |
1842 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
1843 | hdr->exp_statsn, payload_length); | |
1844 | ||
1845 | rx_size = text_length = payload_length; | |
1846 | if (text_length) { | |
1847 | text_in = kzalloc(text_length, GFP_KERNEL); | |
1848 | if (!text_in) { | |
1849 | pr_err("Unable to allocate memory for" | |
1850 | " incoming text parameters\n"); | |
1851 | return -1; | |
1852 | } | |
1853 | ||
1854 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
1855 | iov[niov].iov_base = text_in; | |
1856 | iov[niov++].iov_len = text_length; | |
1857 | ||
1858 | padding = ((-payload_length) & 3); | |
1859 | if (padding != 0) { | |
76f1928e | 1860 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
1861 | iov[niov++].iov_len = padding; |
1862 | rx_size += padding; | |
1863 | pr_debug("Receiving %u additional bytes" | |
1864 | " for padding.\n", padding); | |
1865 | } | |
1866 | if (conn->conn_ops->DataDigest) { | |
1867 | iov[niov].iov_base = &checksum; | |
1868 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1869 | rx_size += ISCSI_CRC_LEN; | |
1870 | } | |
1871 | ||
1872 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
1873 | if (rx_got != rx_size) { | |
1874 | kfree(text_in); | |
1875 | return -1; | |
1876 | } | |
1877 | ||
1878 | if (conn->conn_ops->DataDigest) { | |
1879 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1880 | text_in, text_length, | |
76f1928e | 1881 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
1882 | (u8 *)&data_crc); |
1883 | ||
1884 | if (checksum != data_crc) { | |
1885 | pr_err("Text data CRC32C DataDigest" | |
1886 | " 0x%08x does not match computed" | |
1887 | " 0x%08x\n", checksum, data_crc); | |
1888 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1889 | pr_err("Unable to recover from" | |
1890 | " Text Data digest failure while in" | |
1891 | " ERL=0.\n"); | |
1892 | kfree(text_in); | |
1893 | return -1; | |
1894 | } else { | |
1895 | /* | |
1896 | * Silently drop this PDU and let the | |
1897 | * initiator plug the CmdSN gap. | |
1898 | */ | |
1899 | pr_debug("Dropping Text" | |
1900 | " Command CmdSN: 0x%08x due to" | |
1901 | " DataCRC error.\n", hdr->cmdsn); | |
1902 | kfree(text_in); | |
1903 | return 0; | |
1904 | } | |
1905 | } else { | |
1906 | pr_debug("Got CRC32C DataDigest" | |
1907 | " 0x%08x for %u bytes of text data.\n", | |
1908 | checksum, text_length); | |
1909 | } | |
1910 | } | |
1911 | text_in[text_length - 1] = '\0'; | |
1912 | pr_debug("Successfully read %d bytes of text" | |
1913 | " data.\n", text_length); | |
1914 | ||
1915 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
1916 | pr_err("Received Text Data that is not" | |
1917 | " SendTargets, cannot continue.\n"); | |
1918 | kfree(text_in); | |
1919 | return -1; | |
1920 | } | |
1921 | text_ptr = strchr(text_in, '='); | |
1922 | if (!text_ptr) { | |
1923 | pr_err("No \"=\" separator found in Text Data," | |
1924 | " cannot continue.\n"); | |
1925 | kfree(text_in); | |
1926 | return -1; | |
1927 | } | |
1928 | if (strncmp("=All", text_ptr, 4) != 0) { | |
1929 | pr_err("Unable to locate All value for" | |
1930 | " SendTargets key, cannot continue.\n"); | |
1931 | kfree(text_in); | |
1932 | return -1; | |
1933 | } | |
1934 | /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */ | |
1935 | kfree(text_in); | |
1936 | } | |
1937 | ||
1938 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
1939 | if (!cmd) | |
1940 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1941 | 1, buf, conn); | |
1942 | ||
1943 | cmd->iscsi_opcode = ISCSI_OP_TEXT; | |
1944 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
1945 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1946 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1947 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1948 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1949 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1950 | cmd->data_direction = DMA_NONE; |
1951 | ||
1952 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1953 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1954 | spin_unlock_bh(&conn->cmd_lock); |
1955 | ||
50e5c87d | 1956 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1957 | |
1958 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1959 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1960 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1961 | return iscsit_add_reject_from_cmd( | |
1962 | ISCSI_REASON_PROTOCOL_ERROR, | |
1963 | 1, 0, buf, cmd); | |
1964 | ||
1965 | return 0; | |
1966 | } | |
1967 | ||
1968 | return iscsit_execute_cmd(cmd, 0); | |
1969 | } | |
1970 | ||
1971 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
1972 | { | |
1973 | struct iscsi_conn *conn_p; | |
1974 | struct iscsi_session *sess = conn->sess; | |
1975 | ||
1976 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
1977 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
1978 | ||
1979 | atomic_set(&sess->session_logout, 1); | |
1980 | atomic_set(&conn->conn_logout_remove, 1); | |
1981 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
1982 | ||
1983 | iscsit_inc_conn_usage_count(conn); | |
1984 | iscsit_inc_session_usage_count(sess); | |
1985 | ||
1986 | spin_lock_bh(&sess->conn_lock); | |
1987 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
1988 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
1989 | continue; | |
1990 | ||
1991 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
1992 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
1993 | } | |
1994 | spin_unlock_bh(&sess->conn_lock); | |
1995 | ||
1996 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
1997 | ||
1998 | return 0; | |
1999 | } | |
2000 | ||
2001 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2002 | { | |
2003 | struct iscsi_conn *l_conn; | |
2004 | struct iscsi_session *sess = conn->sess; | |
2005 | ||
2006 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2007 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2008 | ||
2009 | /* | |
2010 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2011 | * can arrive on a connection with a differing CID. | |
2012 | */ | |
2013 | if (conn->cid == cmd->logout_cid) { | |
2014 | spin_lock_bh(&conn->state_lock); | |
2015 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2016 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2017 | ||
2018 | atomic_set(&conn->conn_logout_remove, 1); | |
2019 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2020 | iscsit_inc_conn_usage_count(conn); | |
2021 | ||
2022 | spin_unlock_bh(&conn->state_lock); | |
2023 | } else { | |
2024 | /* | |
2025 | * Handle all different cid CLOSECONNECTION requests in | |
2026 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2027 | * time for any non immediate command's CmdSN to be | |
2028 | * acknowledged on the connection in question. | |
2029 | * | |
2030 | * Here we simply make sure the CID is still around. | |
2031 | */ | |
2032 | l_conn = iscsit_get_conn_from_cid(sess, | |
2033 | cmd->logout_cid); | |
2034 | if (!l_conn) { | |
2035 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2036 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2037 | cmd->i_state); | |
2038 | return 0; | |
2039 | } | |
2040 | ||
2041 | iscsit_dec_conn_usage_count(l_conn); | |
2042 | } | |
2043 | ||
2044 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2045 | ||
2046 | return 0; | |
2047 | } | |
2048 | ||
2049 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2050 | { | |
2051 | struct iscsi_session *sess = conn->sess; | |
2052 | ||
2053 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2054 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2055 | ||
2056 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2057 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2058 | " while ERL!=2.\n"); | |
2059 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2060 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2061 | return 0; | |
2062 | } | |
2063 | ||
2064 | if (conn->cid == cmd->logout_cid) { | |
2065 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2066 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2067 | cmd->logout_cid, conn->cid); | |
2068 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2069 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2070 | return 0; | |
2071 | } | |
2072 | ||
2073 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2074 | ||
2075 | return 0; | |
2076 | } | |
2077 | ||
2078 | static int iscsit_handle_logout_cmd( | |
2079 | struct iscsi_conn *conn, | |
2080 | unsigned char *buf) | |
2081 | { | |
2082 | int cmdsn_ret, logout_remove = 0; | |
2083 | u8 reason_code = 0; | |
2084 | struct iscsi_cmd *cmd; | |
2085 | struct iscsi_logout *hdr; | |
2086 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2087 | ||
2088 | hdr = (struct iscsi_logout *) buf; | |
2089 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2090 | |
2091 | if (tiqn) { | |
2092 | spin_lock(&tiqn->logout_stats.lock); | |
2093 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2094 | tiqn->logout_stats.normal_logouts++; | |
2095 | else | |
2096 | tiqn->logout_stats.abnormal_logouts++; | |
2097 | spin_unlock(&tiqn->logout_stats.lock); | |
2098 | } | |
2099 | ||
2100 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2101 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2102 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2103 | hdr->cid, conn->cid); | |
2104 | ||
2105 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2106 | pr_err("Received logout request on connection that" | |
2107 | " is not in logged in state, ignoring request.\n"); | |
2108 | return 0; | |
2109 | } | |
2110 | ||
2111 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
2112 | if (!cmd) | |
2113 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, | |
2114 | buf, conn); | |
2115 | ||
2116 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; | |
2117 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2118 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2119 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2120 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2121 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2122 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2123 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2124 | cmd->logout_reason = reason_code; |
2125 | cmd->data_direction = DMA_NONE; | |
2126 | ||
2127 | /* | |
2128 | * We need to sleep in these cases (by returning 1) until the Logout | |
2129 | * Response gets sent in the tx thread. | |
2130 | */ | |
2131 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2132 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2133 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2134 | logout_remove = 1; |
2135 | ||
2136 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2137 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2138 | spin_unlock_bh(&conn->cmd_lock); |
2139 | ||
2140 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2141 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2142 | |
2143 | /* | |
2144 | * Immediate commands are executed, well, immediately. | |
2145 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2146 | */ | |
c6037cc5 | 2147 | if (cmd->immediate_cmd) { |
e48354ce NB |
2148 | int ret = iscsit_execute_cmd(cmd, 0); |
2149 | ||
2150 | if (ret < 0) | |
2151 | return ret; | |
2152 | } else { | |
2153 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
2154 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
2155 | logout_remove = 0; | |
2156 | } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { | |
2157 | return iscsit_add_reject_from_cmd( | |
2158 | ISCSI_REASON_PROTOCOL_ERROR, | |
2159 | 1, 0, buf, cmd); | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | return logout_remove; | |
2164 | } | |
2165 | ||
2166 | static int iscsit_handle_snack( | |
2167 | struct iscsi_conn *conn, | |
2168 | unsigned char *buf) | |
2169 | { | |
e48354ce NB |
2170 | struct iscsi_snack *hdr; |
2171 | ||
2172 | hdr = (struct iscsi_snack *) buf; | |
2173 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2174 | |
2175 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2176 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2177 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2178 | hdr->begrun, hdr->runlength, conn->cid); | |
2179 | ||
2180 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2181 | pr_err("Initiator sent SNACK request while in" | |
2182 | " ErrorRecoveryLevel=0.\n"); | |
2183 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2184 | buf, conn); | |
2185 | } | |
2186 | /* | |
2187 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2188 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2189 | */ | |
2190 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2191 | case 0: | |
2192 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2193 | hdr->itt, |
2194 | be32_to_cpu(hdr->ttt), | |
2195 | be32_to_cpu(hdr->begrun), | |
2196 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2197 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2198 | return iscsit_handle_status_snack(conn, hdr->itt, |
2199 | be32_to_cpu(hdr->ttt), | |
2200 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2201 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2202 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2203 | be32_to_cpu(hdr->begrun), | |
2204 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2205 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2206 | /* FIXME: Support R-Data SNACK */ | |
2207 | pr_err("R-Data SNACK Not Supported.\n"); | |
2208 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2209 | buf, conn); | |
2210 | default: | |
2211 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2212 | " error.\n", hdr->flags & 0x0f); | |
2213 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2214 | buf, conn); | |
2215 | } | |
2216 | ||
2217 | return 0; | |
2218 | } | |
2219 | ||
2220 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2221 | { | |
2222 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2223 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2224 | wait_for_completion_interruptible_timeout( | |
2225 | &conn->rx_half_close_comp, | |
2226 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2227 | } | |
2228 | } | |
2229 | ||
2230 | static int iscsit_handle_immediate_data( | |
2231 | struct iscsi_cmd *cmd, | |
2232 | unsigned char *buf, | |
2233 | u32 length) | |
2234 | { | |
2235 | int iov_ret, rx_got = 0, rx_size = 0; | |
2236 | u32 checksum, iov_count = 0, padding = 0; | |
2237 | struct iscsi_conn *conn = cmd->conn; | |
2238 | struct kvec *iov; | |
2239 | ||
2240 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2241 | if (iov_ret < 0) | |
2242 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2243 | ||
2244 | rx_size = length; | |
2245 | iov_count = iov_ret; | |
2246 | iov = &cmd->iov_data[0]; | |
2247 | ||
2248 | padding = ((-length) & 3); | |
2249 | if (padding != 0) { | |
2250 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2251 | iov[iov_count++].iov_len = padding; | |
2252 | rx_size += padding; | |
2253 | } | |
2254 | ||
2255 | if (conn->conn_ops->DataDigest) { | |
2256 | iov[iov_count].iov_base = &checksum; | |
2257 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2258 | rx_size += ISCSI_CRC_LEN; | |
2259 | } | |
2260 | ||
2261 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2262 | ||
2263 | iscsit_unmap_iovec(cmd); | |
2264 | ||
2265 | if (rx_got != rx_size) { | |
2266 | iscsit_rx_thread_wait_for_tcp(conn); | |
2267 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2268 | } | |
2269 | ||
2270 | if (conn->conn_ops->DataDigest) { | |
2271 | u32 data_crc; | |
2272 | ||
2273 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
2274 | cmd->write_data_done, length, padding, | |
2275 | cmd->pad_bytes); | |
2276 | ||
2277 | if (checksum != data_crc) { | |
2278 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2279 | " does not match computed 0x%08x\n", checksum, | |
2280 | data_crc); | |
2281 | ||
2282 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2283 | pr_err("Unable to recover from" | |
2284 | " Immediate Data digest failure while" | |
2285 | " in ERL=0.\n"); | |
2286 | iscsit_add_reject_from_cmd( | |
2287 | ISCSI_REASON_DATA_DIGEST_ERROR, | |
2288 | 1, 0, buf, cmd); | |
2289 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2290 | } else { | |
2291 | iscsit_add_reject_from_cmd( | |
2292 | ISCSI_REASON_DATA_DIGEST_ERROR, | |
2293 | 0, 0, buf, cmd); | |
2294 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; | |
2295 | } | |
2296 | } else { | |
2297 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2298 | " %u bytes of Immediate Data\n", checksum, | |
2299 | length); | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | cmd->write_data_done += length; | |
2304 | ||
ebf1d95c | 2305 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2306 | spin_lock_bh(&cmd->istate_lock); |
2307 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2308 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2309 | spin_unlock_bh(&cmd->istate_lock); | |
2310 | } | |
2311 | ||
2312 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2313 | } | |
2314 | ||
2315 | /* | |
2316 | * Called with sess->conn_lock held. | |
2317 | */ | |
2318 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2319 | with active network interface */ | |
2320 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2321 | { | |
2322 | struct iscsi_cmd *cmd; | |
2323 | struct iscsi_conn *conn_p; | |
2324 | ||
2325 | /* | |
2326 | * Only send a Asynchronous Message on connections whos network | |
2327 | * interface is still functional. | |
2328 | */ | |
2329 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2330 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2331 | iscsit_inc_conn_usage_count(conn_p); | |
2332 | break; | |
2333 | } | |
2334 | } | |
2335 | ||
2336 | if (!conn_p) | |
2337 | return; | |
2338 | ||
2339 | cmd = iscsit_allocate_cmd(conn_p, GFP_KERNEL); | |
2340 | if (!cmd) { | |
2341 | iscsit_dec_conn_usage_count(conn_p); | |
2342 | return; | |
2343 | } | |
2344 | ||
2345 | cmd->logout_cid = conn->cid; | |
2346 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2347 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2348 | ||
2349 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2350 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2351 | spin_unlock_bh(&conn_p->cmd_lock); |
2352 | ||
2353 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2354 | iscsit_dec_conn_usage_count(conn_p); | |
2355 | } | |
2356 | ||
2357 | static int iscsit_send_conn_drop_async_message( | |
2358 | struct iscsi_cmd *cmd, | |
2359 | struct iscsi_conn *conn) | |
2360 | { | |
2361 | struct iscsi_async *hdr; | |
2362 | ||
2363 | cmd->tx_size = ISCSI_HDR_LEN; | |
2364 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2365 | ||
2366 | hdr = (struct iscsi_async *) cmd->pdu; | |
2367 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2368 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2369 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2370 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2371 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2372 | cmd->stat_sn = conn->stat_sn++; | |
2373 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2374 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2375 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2376 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; | |
2377 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2378 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2379 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2380 | ||
2381 | if (conn->conn_ops->HeaderDigest) { | |
2382 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2383 | ||
2384 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2385 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2386 | 0, NULL, (u8 *)header_digest); | |
2387 | ||
2388 | cmd->tx_size += ISCSI_CRC_LEN; | |
2389 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2390 | " Async Message 0x%08x\n", *header_digest); | |
2391 | } | |
2392 | ||
2393 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2394 | cmd->iov_misc[0].iov_len = cmd->tx_size; | |
2395 | cmd->iov_misc_count = 1; | |
2396 | ||
2397 | pr_debug("Sending Connection Dropped Async Message StatSN:" | |
2398 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2399 | cmd->logout_cid, conn->cid); | |
2400 | return 0; | |
2401 | } | |
2402 | ||
6f3c0e69 AG |
2403 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2404 | { | |
2405 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2406 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2407 | wait_for_completion_interruptible_timeout( | |
2408 | &conn->tx_half_close_comp, | |
2409 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2410 | } | |
2411 | } | |
2412 | ||
e48354ce NB |
2413 | static int iscsit_send_data_in( |
2414 | struct iscsi_cmd *cmd, | |
6f3c0e69 | 2415 | struct iscsi_conn *conn) |
e48354ce NB |
2416 | { |
2417 | int iov_ret = 0, set_statsn = 0; | |
2418 | u32 iov_count = 0, tx_size = 0; | |
2419 | struct iscsi_datain datain; | |
2420 | struct iscsi_datain_req *dr; | |
2421 | struct iscsi_data_rsp *hdr; | |
2422 | struct kvec *iov; | |
6f3c0e69 AG |
2423 | int eodr = 0; |
2424 | int ret; | |
e48354ce NB |
2425 | |
2426 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2427 | dr = iscsit_get_datain_values(cmd, &datain); | |
2428 | if (!dr) { | |
2429 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2430 | cmd->init_task_tag); | |
2431 | return -1; | |
2432 | } | |
2433 | ||
2434 | /* | |
2435 | * Be paranoid and double check the logic for now. | |
2436 | */ | |
ebf1d95c | 2437 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2438 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2439 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2440 | cmd->init_task_tag, datain.offset, datain.length, | |
ebf1d95c | 2441 | cmd->se_cmd.data_length); |
e48354ce NB |
2442 | return -1; |
2443 | } | |
2444 | ||
2445 | spin_lock_bh(&conn->sess->session_stats_lock); | |
2446 | conn->sess->tx_data_octets += datain.length; | |
2447 | if (conn->sess->se_sess->se_node_acl) { | |
2448 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
2449 | conn->sess->se_sess->se_node_acl->read_bytes += datain.length; | |
2450 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
2451 | } | |
2452 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
2453 | /* | |
2454 | * Special case for successfully execution w/ both DATAIN | |
2455 | * and Sense Data. | |
2456 | */ | |
2457 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2458 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2459 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2460 | else { | |
2461 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2462 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2463 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2464 | cmd->stat_sn = conn->stat_sn++; | |
2465 | set_statsn = 1; | |
2466 | } else if (dr->dr_complete == | |
2467 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) | |
2468 | set_statsn = 1; | |
2469 | } | |
2470 | ||
2471 | hdr = (struct iscsi_data_rsp *) cmd->pdu; | |
2472 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2473 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; | |
2474 | hdr->flags = datain.flags; | |
2475 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2476 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2477 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
7e46cf02 | 2478 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
2479 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
2480 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
7e46cf02 | 2481 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
2482 | } |
2483 | } | |
2484 | hton24(hdr->dlength, datain.length); | |
2485 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2486 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2487 | (struct scsi_lun *)&hdr->lun); | |
2488 | else | |
2489 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2490 | ||
66c7db68 | 2491 | hdr->itt = cmd->init_task_tag; |
50e5c87d CH |
2492 | |
2493 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2494 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2495 | else | |
2496 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2497 | if (set_statsn) | |
2498 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2499 | else | |
2500 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2501 | ||
e48354ce NB |
2502 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
2503 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2504 | hdr->datasn = cpu_to_be32(datain.data_sn); | |
2505 | hdr->offset = cpu_to_be32(datain.offset); | |
2506 | ||
2507 | iov = &cmd->iov_data[0]; | |
2508 | iov[iov_count].iov_base = cmd->pdu; | |
2509 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
2510 | tx_size += ISCSI_HDR_LEN; | |
2511 | ||
2512 | if (conn->conn_ops->HeaderDigest) { | |
2513 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2514 | ||
2515 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2516 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2517 | 0, NULL, (u8 *)header_digest); | |
2518 | ||
2519 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2520 | tx_size += ISCSI_CRC_LEN; | |
2521 | ||
2522 | pr_debug("Attaching CRC32 HeaderDigest" | |
2523 | " for DataIN PDU 0x%08x\n", *header_digest); | |
2524 | } | |
2525 | ||
2526 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], datain.offset, datain.length); | |
2527 | if (iov_ret < 0) | |
2528 | return -1; | |
2529 | ||
2530 | iov_count += iov_ret; | |
2531 | tx_size += datain.length; | |
2532 | ||
2533 | cmd->padding = ((-datain.length) & 3); | |
2534 | if (cmd->padding) { | |
2535 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2536 | iov[iov_count++].iov_len = cmd->padding; | |
2537 | tx_size += cmd->padding; | |
2538 | ||
2539 | pr_debug("Attaching %u padding bytes\n", | |
2540 | cmd->padding); | |
2541 | } | |
2542 | if (conn->conn_ops->DataDigest) { | |
2543 | cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, | |
2544 | datain.offset, datain.length, cmd->padding, cmd->pad_bytes); | |
2545 | ||
2546 | iov[iov_count].iov_base = &cmd->data_crc; | |
2547 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2548 | tx_size += ISCSI_CRC_LEN; | |
2549 | ||
2550 | pr_debug("Attached CRC32C DataDigest %d bytes, crc" | |
2551 | " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); | |
2552 | } | |
2553 | ||
2554 | cmd->iov_data_count = iov_count; | |
2555 | cmd->tx_size = tx_size; | |
2556 | ||
2557 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2558 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2559 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2560 | ntohl(hdr->offset), datain.length, conn->cid); | |
2561 | ||
6f3c0e69 AG |
2562 | /* sendpage is preferred but can't insert markers */ |
2563 | if (!conn->conn_ops->IFMarker) | |
2564 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
2565 | else | |
2566 | ret = iscsit_send_tx_data(cmd, conn, 0); | |
2567 | ||
2568 | iscsit_unmap_iovec(cmd); | |
2569 | ||
2570 | if (ret < 0) { | |
2571 | iscsit_tx_thread_wait_for_tcp(conn); | |
2572 | return ret; | |
2573 | } | |
2574 | ||
e48354ce | 2575 | if (dr->dr_complete) { |
6f3c0e69 | 2576 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2577 | 2 : 1; |
2578 | iscsit_free_datain_req(cmd, dr); | |
2579 | } | |
2580 | ||
6f3c0e69 | 2581 | return eodr; |
e48354ce NB |
2582 | } |
2583 | ||
2584 | static int iscsit_send_logout_response( | |
2585 | struct iscsi_cmd *cmd, | |
2586 | struct iscsi_conn *conn) | |
2587 | { | |
2588 | int niov = 0, tx_size; | |
2589 | struct iscsi_conn *logout_conn = NULL; | |
2590 | struct iscsi_conn_recovery *cr = NULL; | |
2591 | struct iscsi_session *sess = conn->sess; | |
2592 | struct kvec *iov; | |
2593 | struct iscsi_logout_rsp *hdr; | |
2594 | /* | |
2595 | * The actual shutting down of Sessions and/or Connections | |
2596 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2597 | * is done in scsi_logout_post_handler(). | |
2598 | */ | |
2599 | switch (cmd->logout_reason) { | |
2600 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2601 | pr_debug("iSCSI session logout successful, setting" | |
2602 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2603 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2604 | break; | |
2605 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2606 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2607 | break; | |
2608 | /* | |
2609 | * For CLOSECONNECTION logout requests carrying | |
2610 | * a matching logout CID -> local CID, the reference | |
2611 | * for the local CID will have been incremented in | |
2612 | * iscsi_logout_closeconnection(). | |
2613 | * | |
2614 | * For CLOSECONNECTION logout requests carrying | |
2615 | * a different CID than the connection it arrived | |
2616 | * on, the connection responding to cmd->logout_cid | |
2617 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2618 | */ | |
2619 | ||
2620 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2621 | " successful.\n", cmd->logout_cid, conn->cid); | |
2622 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2623 | break; | |
2624 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2625 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2626 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2627 | break; | |
2628 | /* | |
2629 | * If the connection is still active from our point of view | |
2630 | * force connection recovery to occur. | |
2631 | */ | |
2632 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2633 | cmd->logout_cid); | |
ee1b1b9c | 2634 | if (logout_conn) { |
e48354ce NB |
2635 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2636 | iscsit_dec_conn_usage_count(logout_conn); | |
2637 | } | |
2638 | ||
2639 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2640 | conn->sess, cmd->logout_cid); | |
2641 | if (!cr) { | |
2642 | pr_err("Unable to locate CID: %hu for" | |
2643 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2644 | cmd->logout_cid); | |
2645 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2646 | break; | |
2647 | } | |
2648 | ||
2649 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2650 | ||
2651 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2652 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2653 | cmd->logout_cid, conn->cid); | |
2654 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2655 | break; | |
2656 | default: | |
2657 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2658 | cmd->logout_reason); | |
2659 | return -1; | |
2660 | } | |
2661 | ||
2662 | tx_size = ISCSI_HDR_LEN; | |
2663 | hdr = (struct iscsi_logout_rsp *)cmd->pdu; | |
2664 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2665 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; | |
2666 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2667 | hdr->response = cmd->logout_response; | |
66c7db68 | 2668 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2669 | cmd->stat_sn = conn->stat_sn++; |
2670 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2671 | ||
2672 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2673 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2674 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2675 | ||
2676 | iov = &cmd->iov_misc[0]; | |
2677 | iov[niov].iov_base = cmd->pdu; | |
2678 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2679 | ||
2680 | if (conn->conn_ops->HeaderDigest) { | |
2681 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2682 | ||
2683 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2684 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2685 | 0, NULL, (u8 *)header_digest); | |
2686 | ||
2687 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2688 | tx_size += ISCSI_CRC_LEN; | |
2689 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2690 | " Logout Response 0x%08x\n", *header_digest); | |
2691 | } | |
2692 | cmd->iov_misc_count = niov; | |
2693 | cmd->tx_size = tx_size; | |
2694 | ||
2695 | pr_debug("Sending Logout Response ITT: 0x%08x StatSN:" | |
2696 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2697 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2698 | cmd->logout_cid, conn->cid); | |
2699 | ||
2700 | return 0; | |
2701 | } | |
2702 | ||
2703 | /* | |
2704 | * Unsolicited NOPIN, either requesting a response or not. | |
2705 | */ | |
2706 | static int iscsit_send_unsolicited_nopin( | |
2707 | struct iscsi_cmd *cmd, | |
2708 | struct iscsi_conn *conn, | |
2709 | int want_response) | |
2710 | { | |
2711 | int tx_size = ISCSI_HDR_LEN; | |
2712 | struct iscsi_nopin *hdr; | |
6f3c0e69 | 2713 | int ret; |
e48354ce NB |
2714 | |
2715 | hdr = (struct iscsi_nopin *) cmd->pdu; | |
2716 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2717 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2718 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2719 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2720 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); |
2721 | cmd->stat_sn = conn->stat_sn; | |
2722 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2723 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2724 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2725 | ||
2726 | if (conn->conn_ops->HeaderDigest) { | |
2727 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2728 | ||
2729 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2730 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2731 | 0, NULL, (u8 *)header_digest); | |
2732 | ||
2733 | tx_size += ISCSI_CRC_LEN; | |
2734 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2735 | " NopIN 0x%08x\n", *header_digest); | |
2736 | } | |
2737 | ||
2738 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2739 | cmd->iov_misc[0].iov_len = tx_size; | |
2740 | cmd->iov_misc_count = 1; | |
2741 | cmd->tx_size = tx_size; | |
2742 | ||
2743 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" | |
2744 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2745 | ||
6f3c0e69 AG |
2746 | ret = iscsit_send_tx_data(cmd, conn, 1); |
2747 | if (ret < 0) { | |
2748 | iscsit_tx_thread_wait_for_tcp(conn); | |
2749 | return ret; | |
2750 | } | |
2751 | ||
2752 | spin_lock_bh(&cmd->istate_lock); | |
2753 | cmd->i_state = want_response ? | |
2754 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
2755 | spin_unlock_bh(&cmd->istate_lock); | |
2756 | ||
e48354ce NB |
2757 | return 0; |
2758 | } | |
2759 | ||
2760 | static int iscsit_send_nopin_response( | |
2761 | struct iscsi_cmd *cmd, | |
2762 | struct iscsi_conn *conn) | |
2763 | { | |
2764 | int niov = 0, tx_size; | |
2765 | u32 padding = 0; | |
2766 | struct kvec *iov; | |
2767 | struct iscsi_nopin *hdr; | |
2768 | ||
2769 | tx_size = ISCSI_HDR_LEN; | |
2770 | hdr = (struct iscsi_nopin *) cmd->pdu; | |
2771 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2772 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2773 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2774 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2775 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
66c7db68 | 2776 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2777 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); |
2778 | cmd->stat_sn = conn->stat_sn++; | |
2779 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2780 | ||
2781 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2782 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2783 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2784 | ||
2785 | iov = &cmd->iov_misc[0]; | |
2786 | iov[niov].iov_base = cmd->pdu; | |
2787 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2788 | ||
2789 | if (conn->conn_ops->HeaderDigest) { | |
2790 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2791 | ||
2792 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2793 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2794 | 0, NULL, (u8 *)header_digest); | |
2795 | ||
2796 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2797 | tx_size += ISCSI_CRC_LEN; | |
2798 | pr_debug("Attaching CRC32C HeaderDigest" | |
2799 | " to NopIn 0x%08x\n", *header_digest); | |
2800 | } | |
2801 | ||
2802 | /* | |
2803 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
2804 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
2805 | */ | |
2806 | if (cmd->buf_ptr_size) { | |
2807 | iov[niov].iov_base = cmd->buf_ptr; | |
2808 | iov[niov++].iov_len = cmd->buf_ptr_size; | |
2809 | tx_size += cmd->buf_ptr_size; | |
2810 | ||
2811 | pr_debug("Echoing back %u bytes of ping" | |
2812 | " data.\n", cmd->buf_ptr_size); | |
2813 | ||
2814 | padding = ((-cmd->buf_ptr_size) & 3); | |
2815 | if (padding != 0) { | |
2816 | iov[niov].iov_base = &cmd->pad_bytes; | |
2817 | iov[niov++].iov_len = padding; | |
2818 | tx_size += padding; | |
2819 | pr_debug("Attaching %u additional" | |
2820 | " padding bytes.\n", padding); | |
2821 | } | |
2822 | if (conn->conn_ops->DataDigest) { | |
2823 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2824 | cmd->buf_ptr, cmd->buf_ptr_size, | |
2825 | padding, (u8 *)&cmd->pad_bytes, | |
2826 | (u8 *)&cmd->data_crc); | |
2827 | ||
2828 | iov[niov].iov_base = &cmd->data_crc; | |
2829 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2830 | tx_size += ISCSI_CRC_LEN; | |
2831 | pr_debug("Attached DataDigest for %u" | |
2832 | " bytes of ping data, CRC 0x%08x\n", | |
2833 | cmd->buf_ptr_size, cmd->data_crc); | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | cmd->iov_misc_count = niov; | |
2838 | cmd->tx_size = tx_size; | |
2839 | ||
2840 | pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:" | |
2841 | " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd->init_task_tag, | |
2842 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2843 | ||
2844 | return 0; | |
2845 | } | |
2846 | ||
6f3c0e69 | 2847 | static int iscsit_send_r2t( |
e48354ce NB |
2848 | struct iscsi_cmd *cmd, |
2849 | struct iscsi_conn *conn) | |
2850 | { | |
2851 | int tx_size = 0; | |
2852 | struct iscsi_r2t *r2t; | |
2853 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 2854 | int ret; |
e48354ce NB |
2855 | |
2856 | r2t = iscsit_get_r2t_from_list(cmd); | |
2857 | if (!r2t) | |
2858 | return -1; | |
2859 | ||
2860 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
2861 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2862 | hdr->opcode = ISCSI_OP_R2T; | |
2863 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2864 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2865 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 2866 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2867 | spin_lock_bh(&conn->sess->ttt_lock); |
2868 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
2869 | if (r2t->targ_xfer_tag == 0xFFFFFFFF) | |
2870 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
2871 | spin_unlock_bh(&conn->sess->ttt_lock); | |
2872 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); | |
2873 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
2874 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2875 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2876 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); | |
2877 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
2878 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
2879 | ||
2880 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2881 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
2882 | tx_size += ISCSI_HDR_LEN; | |
2883 | ||
2884 | if (conn->conn_ops->HeaderDigest) { | |
2885 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2886 | ||
2887 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2888 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2889 | 0, NULL, (u8 *)header_digest); | |
2890 | ||
2891 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
2892 | tx_size += ISCSI_CRC_LEN; | |
2893 | pr_debug("Attaching CRC32 HeaderDigest for R2T" | |
2894 | " PDU 0x%08x\n", *header_digest); | |
2895 | } | |
2896 | ||
2897 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" | |
2898 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
2899 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
2900 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
2901 | r2t->offset, r2t->xfer_len, conn->cid); | |
2902 | ||
2903 | cmd->iov_misc_count = 1; | |
2904 | cmd->tx_size = tx_size; | |
2905 | ||
2906 | spin_lock_bh(&cmd->r2t_lock); | |
2907 | r2t->sent_r2t = 1; | |
2908 | spin_unlock_bh(&cmd->r2t_lock); | |
2909 | ||
6f3c0e69 AG |
2910 | ret = iscsit_send_tx_data(cmd, conn, 1); |
2911 | if (ret < 0) { | |
2912 | iscsit_tx_thread_wait_for_tcp(conn); | |
2913 | return ret; | |
2914 | } | |
2915 | ||
2916 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
2917 | iscsit_start_dataout_timer(cmd, conn); | |
2918 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
2919 | ||
e48354ce NB |
2920 | return 0; |
2921 | } | |
2922 | ||
2923 | /* | |
8b1e1244 AG |
2924 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
2925 | * connection recovery. | |
e48354ce NB |
2926 | */ |
2927 | int iscsit_build_r2ts_for_cmd( | |
2928 | struct iscsi_cmd *cmd, | |
2929 | struct iscsi_conn *conn, | |
8b1e1244 | 2930 | bool recovery) |
e48354ce NB |
2931 | { |
2932 | int first_r2t = 1; | |
2933 | u32 offset = 0, xfer_len = 0; | |
2934 | ||
2935 | spin_lock_bh(&cmd->r2t_lock); | |
2936 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
2937 | spin_unlock_bh(&cmd->r2t_lock); | |
2938 | return 0; | |
2939 | } | |
2940 | ||
8b1e1244 AG |
2941 | if (conn->sess->sess_ops->DataSequenceInOrder && |
2942 | !recovery) | |
c6037cc5 | 2943 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
2944 | |
2945 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
2946 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
2947 | offset = cmd->r2t_offset; | |
2948 | ||
8b1e1244 AG |
2949 | if (first_r2t && recovery) { |
2950 | int new_data_end = offset + | |
2951 | conn->sess->sess_ops->MaxBurstLength - | |
2952 | cmd->next_burst_len; | |
2953 | ||
ebf1d95c AG |
2954 | if (new_data_end > cmd->se_cmd.data_length) |
2955 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
2956 | else |
2957 | xfer_len = | |
2958 | conn->sess->sess_ops->MaxBurstLength - | |
2959 | cmd->next_burst_len; | |
e48354ce | 2960 | } else { |
8b1e1244 AG |
2961 | int new_data_end = offset + |
2962 | conn->sess->sess_ops->MaxBurstLength; | |
2963 | ||
ebf1d95c AG |
2964 | if (new_data_end > cmd->se_cmd.data_length) |
2965 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
2966 | else |
2967 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
2968 | } |
2969 | cmd->r2t_offset += xfer_len; | |
2970 | ||
ebf1d95c | 2971 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
2972 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
2973 | } else { | |
2974 | struct iscsi_seq *seq; | |
2975 | ||
2976 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
2977 | if (!seq) { | |
2978 | spin_unlock_bh(&cmd->r2t_lock); | |
2979 | return -1; | |
2980 | } | |
2981 | ||
2982 | offset = seq->offset; | |
2983 | xfer_len = seq->xfer_len; | |
2984 | ||
2985 | if (cmd->seq_send_order == cmd->seq_count) | |
2986 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
2987 | } | |
2988 | cmd->outstanding_r2ts++; | |
2989 | first_r2t = 0; | |
2990 | ||
2991 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
2992 | spin_unlock_bh(&cmd->r2t_lock); | |
2993 | return -1; | |
2994 | } | |
2995 | ||
2996 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
2997 | break; | |
2998 | } | |
2999 | spin_unlock_bh(&cmd->r2t_lock); | |
3000 | ||
3001 | return 0; | |
3002 | } | |
3003 | ||
3004 | static int iscsit_send_status( | |
3005 | struct iscsi_cmd *cmd, | |
3006 | struct iscsi_conn *conn) | |
3007 | { | |
3008 | u8 iov_count = 0, recovery; | |
3009 | u32 padding = 0, tx_size = 0; | |
3010 | struct iscsi_scsi_rsp *hdr; | |
3011 | struct kvec *iov; | |
3012 | ||
3013 | recovery = (cmd->i_state != ISTATE_SEND_STATUS); | |
3014 | if (!recovery) | |
3015 | cmd->stat_sn = conn->stat_sn++; | |
3016 | ||
3017 | spin_lock_bh(&conn->sess->session_stats_lock); | |
3018 | conn->sess->rsp_pdus++; | |
3019 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
3020 | ||
3021 | hdr = (struct iscsi_scsi_rsp *) cmd->pdu; | |
3022 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3023 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3024 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3025 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3026 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3027 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3028 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3029 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3030 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3031 | } |
3032 | hdr->response = cmd->iscsi_response; | |
3033 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3034 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3035 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3036 | ||
3037 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3038 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3039 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3040 | ||
3041 | iov = &cmd->iov_misc[0]; | |
3042 | iov[iov_count].iov_base = cmd->pdu; | |
3043 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3044 | tx_size += ISCSI_HDR_LEN; | |
3045 | ||
3046 | /* | |
3047 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3048 | */ | |
3049 | if (cmd->se_cmd.sense_buffer && | |
3050 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3051 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3052 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3053 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3054 | ||
e48354ce | 3055 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3056 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
9c58b7dd | 3057 | iov[iov_count].iov_base = cmd->sense_buffer; |
e48354ce NB |
3058 | iov[iov_count++].iov_len = |
3059 | (cmd->se_cmd.scsi_sense_length + padding); | |
3060 | tx_size += cmd->se_cmd.scsi_sense_length; | |
3061 | ||
3062 | if (padding) { | |
9c58b7dd | 3063 | memset(cmd->sense_buffer + |
e48354ce NB |
3064 | cmd->se_cmd.scsi_sense_length, 0, padding); |
3065 | tx_size += padding; | |
3066 | pr_debug("Adding %u bytes of padding to" | |
3067 | " SENSE.\n", padding); | |
3068 | } | |
3069 | ||
3070 | if (conn->conn_ops->DataDigest) { | |
3071 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
9c58b7dd | 3072 | cmd->sense_buffer, |
e48354ce NB |
3073 | (cmd->se_cmd.scsi_sense_length + padding), |
3074 | 0, NULL, (u8 *)&cmd->data_crc); | |
3075 | ||
3076 | iov[iov_count].iov_base = &cmd->data_crc; | |
3077 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3078 | tx_size += ISCSI_CRC_LEN; | |
3079 | ||
3080 | pr_debug("Attaching CRC32 DataDigest for" | |
3081 | " SENSE, %u bytes CRC 0x%08x\n", | |
3082 | (cmd->se_cmd.scsi_sense_length + padding), | |
3083 | cmd->data_crc); | |
3084 | } | |
3085 | ||
3086 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" | |
3087 | " Response PDU\n", | |
3088 | cmd->se_cmd.scsi_sense_length); | |
3089 | } | |
3090 | ||
3091 | if (conn->conn_ops->HeaderDigest) { | |
3092 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3093 | ||
3094 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3095 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3096 | 0, NULL, (u8 *)header_digest); | |
3097 | ||
3098 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3099 | tx_size += ISCSI_CRC_LEN; | |
3100 | pr_debug("Attaching CRC32 HeaderDigest for Response" | |
3101 | " PDU 0x%08x\n", *header_digest); | |
3102 | } | |
3103 | ||
3104 | cmd->iov_misc_count = iov_count; | |
3105 | cmd->tx_size = tx_size; | |
3106 | ||
3107 | pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x," | |
3108 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3109 | (!recovery) ? "" : "Recovery ", cmd->init_task_tag, | |
3110 | cmd->stat_sn, 0x00, cmd->se_cmd.scsi_status, conn->cid); | |
3111 | ||
3112 | return 0; | |
3113 | } | |
3114 | ||
3115 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3116 | { | |
3117 | switch (se_tmr->response) { | |
3118 | case TMR_FUNCTION_COMPLETE: | |
3119 | return ISCSI_TMF_RSP_COMPLETE; | |
3120 | case TMR_TASK_DOES_NOT_EXIST: | |
3121 | return ISCSI_TMF_RSP_NO_TASK; | |
3122 | case TMR_LUN_DOES_NOT_EXIST: | |
3123 | return ISCSI_TMF_RSP_NO_LUN; | |
3124 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3125 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
3126 | case TMR_FUNCTION_AUTHORIZATION_FAILED: | |
3127 | return ISCSI_TMF_RSP_AUTH_FAILED; | |
3128 | case TMR_FUNCTION_REJECTED: | |
3129 | default: | |
3130 | return ISCSI_TMF_RSP_REJECTED; | |
3131 | } | |
3132 | } | |
3133 | ||
3134 | static int iscsit_send_task_mgt_rsp( | |
3135 | struct iscsi_cmd *cmd, | |
3136 | struct iscsi_conn *conn) | |
3137 | { | |
3138 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
3139 | struct iscsi_tm_rsp *hdr; | |
3140 | u32 tx_size = 0; | |
3141 | ||
3142 | hdr = (struct iscsi_tm_rsp *) cmd->pdu; | |
3143 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3144 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; | |
7ae0b103 | 3145 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3146 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3147 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3148 | cmd->stat_sn = conn->stat_sn++; |
3149 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3150 | ||
3151 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3152 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3153 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3154 | ||
3155 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
3156 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3157 | tx_size += ISCSI_HDR_LEN; | |
3158 | ||
3159 | if (conn->conn_ops->HeaderDigest) { | |
3160 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3161 | ||
3162 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3163 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3164 | 0, NULL, (u8 *)header_digest); | |
3165 | ||
3166 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3167 | tx_size += ISCSI_CRC_LEN; | |
3168 | pr_debug("Attaching CRC32 HeaderDigest for Task" | |
3169 | " Mgmt Response PDU 0x%08x\n", *header_digest); | |
3170 | } | |
3171 | ||
3172 | cmd->iov_misc_count = 1; | |
3173 | cmd->tx_size = tx_size; | |
3174 | ||
3175 | pr_debug("Built Task Management Response ITT: 0x%08x," | |
3176 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3177 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3178 | ||
3179 | return 0; | |
3180 | } | |
3181 | ||
2f9bc894 NB |
3182 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3183 | { | |
3184 | bool ret = false; | |
3185 | ||
3186 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3187 | const struct sockaddr_in6 sin6 = { | |
3188 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3189 | struct sockaddr_in6 *sock_in6 = | |
3190 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3191 | ||
3192 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3193 | sin6.sin6_addr.s6_addr, 16)) | |
3194 | ret = true; | |
3195 | } else { | |
3196 | struct sockaddr_in * sock_in = | |
3197 | (struct sockaddr_in *)&np->np_sockaddr; | |
3198 | ||
cea0b4ce | 3199 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3200 | ret = true; |
3201 | } | |
3202 | ||
3203 | return ret; | |
3204 | } | |
3205 | ||
8b1e1244 AG |
3206 | #define SENDTARGETS_BUF_LIMIT 32768U |
3207 | ||
e48354ce NB |
3208 | static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) |
3209 | { | |
3210 | char *payload = NULL; | |
3211 | struct iscsi_conn *conn = cmd->conn; | |
3212 | struct iscsi_portal_group *tpg; | |
3213 | struct iscsi_tiqn *tiqn; | |
3214 | struct iscsi_tpg_np *tpg_np; | |
3215 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
8b1e1244 | 3216 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
e48354ce | 3217 | |
8b1e1244 AG |
3218 | buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, |
3219 | SENDTARGETS_BUF_LIMIT); | |
e48354ce NB |
3220 | |
3221 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3222 | if (!payload) { | |
3223 | pr_err("Unable to allocate memory for sendtargets" | |
3224 | " response.\n"); | |
3225 | return -ENOMEM; | |
3226 | } | |
3227 | ||
3228 | spin_lock(&tiqn_lock); | |
3229 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
3230 | len = sprintf(buf, "TargetName=%s", tiqn->tiqn); | |
3231 | len += 1; | |
3232 | ||
3233 | if ((len + payload_len) > buffer_len) { | |
e48354ce NB |
3234 | end_of_buf = 1; |
3235 | goto eob; | |
3236 | } | |
8359cf43 | 3237 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3238 | payload_len += len; |
3239 | ||
3240 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3241 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3242 | ||
3243 | spin_lock(&tpg->tpg_state_lock); | |
3244 | if ((tpg->tpg_state == TPG_STATE_FREE) || | |
3245 | (tpg->tpg_state == TPG_STATE_INACTIVE)) { | |
3246 | spin_unlock(&tpg->tpg_state_lock); | |
3247 | continue; | |
3248 | } | |
3249 | spin_unlock(&tpg->tpg_state_lock); | |
3250 | ||
3251 | spin_lock(&tpg->tpg_np_lock); | |
3252 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3253 | tpg_np_list) { | |
2f9bc894 NB |
3254 | struct iscsi_np *np = tpg_np->tpg_np; |
3255 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
3256 | ||
e48354ce NB |
3257 | len = sprintf(buf, "TargetAddress=" |
3258 | "%s%s%s:%hu,%hu", | |
2f9bc894 NB |
3259 | (np->np_sockaddr.ss_family == AF_INET6) ? |
3260 | "[" : "", (inaddr_any == false) ? | |
3261 | np->np_ip : conn->local_ip, | |
3262 | (np->np_sockaddr.ss_family == AF_INET6) ? | |
3263 | "]" : "", (inaddr_any == false) ? | |
3264 | np->np_port : conn->local_port, | |
e48354ce NB |
3265 | tpg->tpgt); |
3266 | len += 1; | |
3267 | ||
3268 | if ((len + payload_len) > buffer_len) { | |
3269 | spin_unlock(&tpg->tpg_np_lock); | |
3270 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3271 | end_of_buf = 1; | |
3272 | goto eob; | |
3273 | } | |
8359cf43 | 3274 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3275 | payload_len += len; |
3276 | } | |
3277 | spin_unlock(&tpg->tpg_np_lock); | |
3278 | } | |
3279 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3280 | eob: | |
3281 | if (end_of_buf) | |
3282 | break; | |
3283 | } | |
3284 | spin_unlock(&tiqn_lock); | |
3285 | ||
3286 | cmd->buf_ptr = payload; | |
3287 | ||
3288 | return payload_len; | |
3289 | } | |
3290 | ||
3291 | /* | |
3292 | * FIXME: Add support for F_BIT and C_BIT when the length is longer than | |
3293 | * MaxRecvDataSegmentLength. | |
3294 | */ | |
3295 | static int iscsit_send_text_rsp( | |
3296 | struct iscsi_cmd *cmd, | |
3297 | struct iscsi_conn *conn) | |
3298 | { | |
3299 | struct iscsi_text_rsp *hdr; | |
3300 | struct kvec *iov; | |
3301 | u32 padding = 0, tx_size = 0; | |
3302 | int text_length, iov_count = 0; | |
3303 | ||
3304 | text_length = iscsit_build_sendtargets_response(cmd); | |
3305 | if (text_length < 0) | |
3306 | return text_length; | |
3307 | ||
3308 | padding = ((-text_length) & 3); | |
3309 | if (padding != 0) { | |
3310 | memset(cmd->buf_ptr + text_length, 0, padding); | |
3311 | pr_debug("Attaching %u additional bytes for" | |
3312 | " padding.\n", padding); | |
3313 | } | |
3314 | ||
3315 | hdr = (struct iscsi_text_rsp *) cmd->pdu; | |
3316 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3317 | hdr->opcode = ISCSI_OP_TEXT_RSP; | |
3318 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3319 | hton24(hdr->dlength, text_length); | |
66c7db68 | 3320 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3321 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); |
3322 | cmd->stat_sn = conn->stat_sn++; | |
3323 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3324 | ||
3325 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3326 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3327 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3328 | ||
3329 | iov = &cmd->iov_misc[0]; | |
3330 | ||
3331 | iov[iov_count].iov_base = cmd->pdu; | |
3332 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3333 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3334 | iov[iov_count++].iov_len = text_length + padding; | |
3335 | ||
3336 | tx_size += (ISCSI_HDR_LEN + text_length + padding); | |
3337 | ||
3338 | if (conn->conn_ops->HeaderDigest) { | |
3339 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3340 | ||
3341 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3342 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3343 | 0, NULL, (u8 *)header_digest); | |
3344 | ||
3345 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3346 | tx_size += ISCSI_CRC_LEN; | |
3347 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3348 | " Text Response PDU 0x%08x\n", *header_digest); | |
3349 | } | |
3350 | ||
3351 | if (conn->conn_ops->DataDigest) { | |
3352 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3353 | cmd->buf_ptr, (text_length + padding), | |
3354 | 0, NULL, (u8 *)&cmd->data_crc); | |
3355 | ||
3356 | iov[iov_count].iov_base = &cmd->data_crc; | |
3357 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3358 | tx_size += ISCSI_CRC_LEN; | |
3359 | ||
3360 | pr_debug("Attaching DataDigest for %u bytes of text" | |
3361 | " data, CRC 0x%08x\n", (text_length + padding), | |
3362 | cmd->data_crc); | |
3363 | } | |
3364 | ||
3365 | cmd->iov_misc_count = iov_count; | |
3366 | cmd->tx_size = tx_size; | |
3367 | ||
3368 | pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," | |
3369 | " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, | |
3370 | text_length, conn->cid); | |
3371 | return 0; | |
3372 | } | |
3373 | ||
3374 | static int iscsit_send_reject( | |
3375 | struct iscsi_cmd *cmd, | |
3376 | struct iscsi_conn *conn) | |
3377 | { | |
3378 | u32 iov_count = 0, tx_size = 0; | |
3379 | struct iscsi_reject *hdr; | |
3380 | struct kvec *iov; | |
3381 | ||
3382 | hdr = (struct iscsi_reject *) cmd->pdu; | |
3383 | hdr->opcode = ISCSI_OP_REJECT; | |
3384 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3385 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
50e5c87d | 3386 | hdr->ffffffff = cpu_to_be32(0xffffffff); |
e48354ce NB |
3387 | cmd->stat_sn = conn->stat_sn++; |
3388 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3389 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3390 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3391 | ||
3392 | iov = &cmd->iov_misc[0]; | |
3393 | ||
3394 | iov[iov_count].iov_base = cmd->pdu; | |
3395 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3396 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3397 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3398 | ||
3399 | tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); | |
3400 | ||
3401 | if (conn->conn_ops->HeaderDigest) { | |
3402 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3403 | ||
3404 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3405 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3406 | 0, NULL, (u8 *)header_digest); | |
3407 | ||
3408 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3409 | tx_size += ISCSI_CRC_LEN; | |
3410 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3411 | " REJECT PDU 0x%08x\n", *header_digest); | |
3412 | } | |
3413 | ||
3414 | if (conn->conn_ops->DataDigest) { | |
3415 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3416 | (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN, | |
3417 | 0, NULL, (u8 *)&cmd->data_crc); | |
3418 | ||
3419 | iov[iov_count].iov_base = &cmd->data_crc; | |
3420 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3421 | tx_size += ISCSI_CRC_LEN; | |
3422 | pr_debug("Attaching CRC32 DataDigest for REJECT" | |
3423 | " PDU 0x%08x\n", cmd->data_crc); | |
3424 | } | |
3425 | ||
3426 | cmd->iov_misc_count = iov_count; | |
3427 | cmd->tx_size = tx_size; | |
3428 | ||
3429 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," | |
3430 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3431 | ||
3432 | return 0; | |
3433 | } | |
3434 | ||
e48354ce NB |
3435 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3436 | { | |
3437 | struct iscsi_thread_set *ts = conn->thread_set; | |
3438 | int ord, cpu; | |
3439 | /* | |
3440 | * thread_id is assigned from iscsit_global->ts_bitmap from | |
3441 | * within iscsi_thread_set.c:iscsi_allocate_thread_sets() | |
3442 | * | |
3443 | * Here we use thread_id to determine which CPU that this | |
3444 | * iSCSI connection's iscsi_thread_set will be scheduled to | |
3445 | * execute upon. | |
3446 | */ | |
3447 | ord = ts->thread_id % cpumask_weight(cpu_online_mask); | |
e48354ce NB |
3448 | for_each_online_cpu(cpu) { |
3449 | if (ord-- == 0) { | |
3450 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3451 | return; | |
3452 | } | |
3453 | } | |
3454 | /* | |
3455 | * This should never be reached.. | |
3456 | */ | |
3457 | dump_stack(); | |
3458 | cpumask_setall(conn->conn_cpumask); | |
3459 | } | |
3460 | ||
3461 | static inline void iscsit_thread_check_cpumask( | |
3462 | struct iscsi_conn *conn, | |
3463 | struct task_struct *p, | |
3464 | int mode) | |
3465 | { | |
3466 | char buf[128]; | |
3467 | /* | |
3468 | * mode == 1 signals iscsi_target_tx_thread() usage. | |
3469 | * mode == 0 signals iscsi_target_rx_thread() usage. | |
3470 | */ | |
3471 | if (mode == 1) { | |
3472 | if (!conn->conn_tx_reset_cpumask) | |
3473 | return; | |
3474 | conn->conn_tx_reset_cpumask = 0; | |
3475 | } else { | |
3476 | if (!conn->conn_rx_reset_cpumask) | |
3477 | return; | |
3478 | conn->conn_rx_reset_cpumask = 0; | |
3479 | } | |
3480 | /* | |
3481 | * Update the CPU mask for this single kthread so that | |
3482 | * both TX and RX kthreads are scheduled to run on the | |
3483 | * same CPU. | |
3484 | */ | |
3485 | memset(buf, 0, 128); | |
3486 | cpumask_scnprintf(buf, 128, conn->conn_cpumask); | |
e48354ce NB |
3487 | set_cpus_allowed_ptr(p, conn->conn_cpumask); |
3488 | } | |
3489 | ||
6f3c0e69 | 3490 | static int handle_immediate_queue(struct iscsi_conn *conn) |
e48354ce | 3491 | { |
6f3c0e69 AG |
3492 | struct iscsi_queue_req *qr; |
3493 | struct iscsi_cmd *cmd; | |
e48354ce | 3494 | u8 state; |
6f3c0e69 AG |
3495 | int ret; |
3496 | ||
3497 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { | |
3498 | atomic_set(&conn->check_immediate_queue, 0); | |
3499 | cmd = qr->cmd; | |
3500 | state = qr->state; | |
3501 | kmem_cache_free(lio_qr_cache, qr); | |
3502 | ||
3503 | switch (state) { | |
3504 | case ISTATE_SEND_R2T: | |
3505 | ret = iscsit_send_r2t(cmd, conn); | |
3506 | if (ret < 0) | |
3507 | goto err; | |
3508 | break; | |
3509 | case ISTATE_REMOVE: | |
3510 | if (cmd->data_direction == DMA_TO_DEVICE) | |
3511 | iscsit_stop_dataout_timer(cmd); | |
3512 | ||
3513 | spin_lock_bh(&conn->cmd_lock); | |
3514 | list_del(&cmd->i_conn_node); | |
3515 | spin_unlock_bh(&conn->cmd_lock); | |
3516 | ||
3517 | iscsit_free_cmd(cmd); | |
3518 | continue; | |
3519 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3520 | iscsit_mod_nopin_response_timer(conn); | |
3521 | ret = iscsit_send_unsolicited_nopin(cmd, | |
3522 | conn, 1); | |
3523 | if (ret < 0) | |
3524 | goto err; | |
3525 | break; | |
3526 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3527 | ret = iscsit_send_unsolicited_nopin(cmd, | |
3528 | conn, 0); | |
3529 | if (ret < 0) | |
3530 | goto err; | |
3531 | break; | |
3532 | default: | |
3533 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3534 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3535 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3536 | conn->cid); | |
3537 | goto err; | |
3538 | } | |
3539 | } | |
3540 | ||
3541 | return 0; | |
3542 | ||
3543 | err: | |
3544 | return -1; | |
3545 | } | |
3546 | ||
3547 | static int handle_response_queue(struct iscsi_conn *conn) | |
3548 | { | |
3549 | struct iscsi_queue_req *qr; | |
3550 | struct iscsi_cmd *cmd; | |
3551 | u8 state; | |
3552 | int ret; | |
3553 | ||
3554 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3555 | cmd = qr->cmd; | |
3556 | state = qr->state; | |
3557 | kmem_cache_free(lio_qr_cache, qr); | |
3558 | ||
3559 | check_rsp_state: | |
3560 | switch (state) { | |
3561 | case ISTATE_SEND_DATAIN: | |
3562 | ret = iscsit_send_data_in(cmd, conn); | |
3563 | if (ret < 0) | |
3564 | goto err; | |
3565 | else if (!ret) | |
3566 | /* more drs */ | |
3567 | goto check_rsp_state; | |
3568 | else if (ret == 1) { | |
3569 | /* all done */ | |
3570 | spin_lock_bh(&cmd->istate_lock); | |
3571 | cmd->i_state = ISTATE_SENT_STATUS; | |
3572 | spin_unlock_bh(&cmd->istate_lock); | |
3573 | continue; | |
3574 | } else if (ret == 2) { | |
3575 | /* Still must send status, | |
3576 | SCF_TRANSPORT_TASK_SENSE was set */ | |
3577 | spin_lock_bh(&cmd->istate_lock); | |
3578 | cmd->i_state = ISTATE_SEND_STATUS; | |
3579 | spin_unlock_bh(&cmd->istate_lock); | |
3580 | state = ISTATE_SEND_STATUS; | |
3581 | goto check_rsp_state; | |
3582 | } | |
3583 | ||
3584 | break; | |
3585 | case ISTATE_SEND_STATUS: | |
3586 | case ISTATE_SEND_STATUS_RECOVERY: | |
3587 | ret = iscsit_send_status(cmd, conn); | |
3588 | break; | |
3589 | case ISTATE_SEND_LOGOUTRSP: | |
3590 | ret = iscsit_send_logout_response(cmd, conn); | |
3591 | break; | |
3592 | case ISTATE_SEND_ASYNCMSG: | |
3593 | ret = iscsit_send_conn_drop_async_message( | |
3594 | cmd, conn); | |
3595 | break; | |
3596 | case ISTATE_SEND_NOPIN: | |
3597 | ret = iscsit_send_nopin_response(cmd, conn); | |
3598 | break; | |
3599 | case ISTATE_SEND_REJECT: | |
3600 | ret = iscsit_send_reject(cmd, conn); | |
3601 | break; | |
3602 | case ISTATE_SEND_TASKMGTRSP: | |
3603 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3604 | if (ret != 0) | |
3605 | break; | |
3606 | ret = iscsit_tmr_post_handler(cmd, conn); | |
3607 | if (ret != 0) | |
3608 | iscsit_fall_back_to_erl0(conn->sess); | |
3609 | break; | |
3610 | case ISTATE_SEND_TEXTRSP: | |
3611 | ret = iscsit_send_text_rsp(cmd, conn); | |
3612 | break; | |
3613 | default: | |
3614 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3615 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3616 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3617 | state, conn->cid); | |
3618 | goto err; | |
3619 | } | |
3620 | if (ret < 0) | |
3621 | goto err; | |
3622 | ||
3623 | if (iscsit_send_tx_data(cmd, conn, 1) < 0) { | |
3624 | iscsit_tx_thread_wait_for_tcp(conn); | |
3625 | iscsit_unmap_iovec(cmd); | |
3626 | goto err; | |
3627 | } | |
3628 | iscsit_unmap_iovec(cmd); | |
3629 | ||
3630 | switch (state) { | |
3631 | case ISTATE_SEND_LOGOUTRSP: | |
3632 | if (!iscsit_logout_post_handler(cmd, conn)) | |
3633 | goto restart; | |
3634 | /* fall through */ | |
3635 | case ISTATE_SEND_STATUS: | |
3636 | case ISTATE_SEND_ASYNCMSG: | |
3637 | case ISTATE_SEND_NOPIN: | |
3638 | case ISTATE_SEND_STATUS_RECOVERY: | |
3639 | case ISTATE_SEND_TEXTRSP: | |
3640 | case ISTATE_SEND_TASKMGTRSP: | |
3641 | spin_lock_bh(&cmd->istate_lock); | |
3642 | cmd->i_state = ISTATE_SENT_STATUS; | |
3643 | spin_unlock_bh(&cmd->istate_lock); | |
3644 | break; | |
3645 | case ISTATE_SEND_REJECT: | |
3646 | if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { | |
3647 | cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; | |
3648 | complete(&cmd->reject_comp); | |
3649 | goto err; | |
3650 | } | |
3651 | complete(&cmd->reject_comp); | |
3652 | break; | |
3653 | default: | |
3654 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3655 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3656 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3657 | cmd->i_state, conn->cid); | |
3658 | goto err; | |
3659 | } | |
3660 | ||
3661 | if (atomic_read(&conn->check_immediate_queue)) | |
3662 | break; | |
3663 | } | |
3664 | ||
3665 | return 0; | |
3666 | ||
3667 | err: | |
3668 | return -1; | |
3669 | restart: | |
3670 | return -EAGAIN; | |
3671 | } | |
3672 | ||
3673 | int iscsi_target_tx_thread(void *arg) | |
3674 | { | |
e48354ce | 3675 | int ret = 0; |
e48354ce | 3676 | struct iscsi_conn *conn; |
8359cf43 | 3677 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3678 | /* |
3679 | * Allow ourselves to be interrupted by SIGINT so that a | |
3680 | * connection recovery / failure event can be triggered externally. | |
3681 | */ | |
3682 | allow_signal(SIGINT); | |
3683 | ||
3684 | restart: | |
3685 | conn = iscsi_tx_thread_pre_handler(ts); | |
3686 | if (!conn) | |
3687 | goto out; | |
3688 | ||
6f3c0e69 | 3689 | ret = 0; |
e48354ce NB |
3690 | |
3691 | while (!kthread_should_stop()) { | |
3692 | /* | |
3693 | * Ensure that both TX and RX per connection kthreads | |
3694 | * are scheduled to run on the same CPU. | |
3695 | */ | |
3696 | iscsit_thread_check_cpumask(conn, current, 1); | |
3697 | ||
d5627acb RD |
3698 | wait_event_interruptible(conn->queues_wq, |
3699 | !iscsit_conn_all_queues_empty(conn) || | |
3700 | ts->status == ISCSI_THREAD_SET_RESET); | |
e48354ce NB |
3701 | |
3702 | if ((ts->status == ISCSI_THREAD_SET_RESET) || | |
3703 | signal_pending(current)) | |
3704 | goto transport_err; | |
3705 | ||
6f3c0e69 AG |
3706 | ret = handle_immediate_queue(conn); |
3707 | if (ret < 0) | |
3708 | goto transport_err; | |
e48354ce | 3709 | |
6f3c0e69 AG |
3710 | ret = handle_response_queue(conn); |
3711 | if (ret == -EAGAIN) | |
3712 | goto restart; | |
3713 | else if (ret < 0) | |
3714 | goto transport_err; | |
e48354ce NB |
3715 | } |
3716 | ||
3717 | transport_err: | |
3718 | iscsit_take_action_for_connection_exit(conn); | |
3719 | goto restart; | |
3720 | out: | |
3721 | return 0; | |
3722 | } | |
3723 | ||
3724 | int iscsi_target_rx_thread(void *arg) | |
3725 | { | |
3726 | int ret; | |
3727 | u8 buffer[ISCSI_HDR_LEN], opcode; | |
3728 | u32 checksum = 0, digest = 0; | |
3729 | struct iscsi_conn *conn = NULL; | |
8359cf43 | 3730 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3731 | struct kvec iov; |
3732 | /* | |
3733 | * Allow ourselves to be interrupted by SIGINT so that a | |
3734 | * connection recovery / failure event can be triggered externally. | |
3735 | */ | |
3736 | allow_signal(SIGINT); | |
3737 | ||
3738 | restart: | |
3739 | conn = iscsi_rx_thread_pre_handler(ts); | |
3740 | if (!conn) | |
3741 | goto out; | |
3742 | ||
3743 | while (!kthread_should_stop()) { | |
3744 | /* | |
3745 | * Ensure that both TX and RX per connection kthreads | |
3746 | * are scheduled to run on the same CPU. | |
3747 | */ | |
3748 | iscsit_thread_check_cpumask(conn, current, 0); | |
3749 | ||
3750 | memset(buffer, 0, ISCSI_HDR_LEN); | |
3751 | memset(&iov, 0, sizeof(struct kvec)); | |
3752 | ||
3753 | iov.iov_base = buffer; | |
3754 | iov.iov_len = ISCSI_HDR_LEN; | |
3755 | ||
3756 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
3757 | if (ret != ISCSI_HDR_LEN) { | |
3758 | iscsit_rx_thread_wait_for_tcp(conn); | |
3759 | goto transport_err; | |
3760 | } | |
3761 | ||
3762 | /* | |
3763 | * Set conn->bad_hdr for use with REJECT PDUs. | |
3764 | */ | |
3765 | memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN); | |
3766 | ||
3767 | if (conn->conn_ops->HeaderDigest) { | |
3768 | iov.iov_base = &digest; | |
3769 | iov.iov_len = ISCSI_CRC_LEN; | |
3770 | ||
3771 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
3772 | if (ret != ISCSI_CRC_LEN) { | |
3773 | iscsit_rx_thread_wait_for_tcp(conn); | |
3774 | goto transport_err; | |
3775 | } | |
3776 | ||
3777 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
3778 | buffer, ISCSI_HDR_LEN, | |
3779 | 0, NULL, (u8 *)&checksum); | |
3780 | ||
3781 | if (digest != checksum) { | |
3782 | pr_err("HeaderDigest CRC32C failed," | |
3783 | " received 0x%08x, computed 0x%08x\n", | |
3784 | digest, checksum); | |
3785 | /* | |
3786 | * Set the PDU to 0xff so it will intentionally | |
3787 | * hit default in the switch below. | |
3788 | */ | |
3789 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
3790 | spin_lock_bh(&conn->sess->session_stats_lock); | |
3791 | conn->sess->conn_digest_errors++; | |
3792 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
3793 | } else { | |
3794 | pr_debug("Got HeaderDigest CRC32C" | |
3795 | " 0x%08x\n", checksum); | |
3796 | } | |
3797 | } | |
3798 | ||
3799 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
3800 | goto transport_err; | |
3801 | ||
3802 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
3803 | ||
3804 | if (conn->sess->sess_ops->SessionType && | |
3805 | ((!(opcode & ISCSI_OP_TEXT)) || | |
3806 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
3807 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
3808 | " while in Discovery Session, rejecting.\n", opcode); | |
3809 | iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
3810 | buffer, conn); | |
3811 | goto transport_err; | |
3812 | } | |
3813 | ||
3814 | switch (opcode) { | |
3815 | case ISCSI_OP_SCSI_CMD: | |
3816 | if (iscsit_handle_scsi_cmd(conn, buffer) < 0) | |
3817 | goto transport_err; | |
3818 | break; | |
3819 | case ISCSI_OP_SCSI_DATA_OUT: | |
3820 | if (iscsit_handle_data_out(conn, buffer) < 0) | |
3821 | goto transport_err; | |
3822 | break; | |
3823 | case ISCSI_OP_NOOP_OUT: | |
3824 | if (iscsit_handle_nop_out(conn, buffer) < 0) | |
3825 | goto transport_err; | |
3826 | break; | |
3827 | case ISCSI_OP_SCSI_TMFUNC: | |
3828 | if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0) | |
3829 | goto transport_err; | |
3830 | break; | |
3831 | case ISCSI_OP_TEXT: | |
3832 | if (iscsit_handle_text_cmd(conn, buffer) < 0) | |
3833 | goto transport_err; | |
3834 | break; | |
3835 | case ISCSI_OP_LOGOUT: | |
3836 | ret = iscsit_handle_logout_cmd(conn, buffer); | |
3837 | if (ret > 0) { | |
3838 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3839 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3840 | goto transport_err; | |
3841 | } else if (ret < 0) | |
3842 | goto transport_err; | |
3843 | break; | |
3844 | case ISCSI_OP_SNACK: | |
3845 | if (iscsit_handle_snack(conn, buffer) < 0) | |
3846 | goto transport_err; | |
3847 | break; | |
3848 | default: | |
3849 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", | |
3850 | opcode); | |
3851 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
3852 | pr_err("Cannot recover from unknown" | |
3853 | " opcode while ERL=0, closing iSCSI connection" | |
3854 | ".\n"); | |
3855 | goto transport_err; | |
3856 | } | |
3857 | if (!conn->conn_ops->OFMarker) { | |
3858 | pr_err("Unable to recover from unknown" | |
3859 | " opcode while OFMarker=No, closing iSCSI" | |
3860 | " connection.\n"); | |
3861 | goto transport_err; | |
3862 | } | |
3863 | if (iscsit_recover_from_unknown_opcode(conn) < 0) { | |
3864 | pr_err("Unable to recover from unknown" | |
3865 | " opcode, closing iSCSI connection.\n"); | |
3866 | goto transport_err; | |
3867 | } | |
3868 | break; | |
3869 | } | |
3870 | } | |
3871 | ||
3872 | transport_err: | |
3873 | if (!signal_pending(current)) | |
3874 | atomic_set(&conn->transport_failed, 1); | |
3875 | iscsit_take_action_for_connection_exit(conn); | |
3876 | goto restart; | |
3877 | out: | |
3878 | return 0; | |
3879 | } | |
3880 | ||
3881 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
3882 | { | |
3883 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; | |
3884 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
3885 | /* |
3886 | * We expect this function to only ever be called from either RX or TX | |
3887 | * thread context via iscsit_close_connection() once the other context | |
3888 | * has been reset -> returned sleeping pre-handler state. | |
3889 | */ | |
3890 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 3891 | list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { |
e48354ce | 3892 | |
2fbb471e | 3893 | list_del(&cmd->i_conn_node); |
e48354ce NB |
3894 | spin_unlock_bh(&conn->cmd_lock); |
3895 | ||
3896 | iscsit_increment_maxcmdsn(cmd, sess); | |
e48354ce | 3897 | |
d270190a | 3898 | iscsit_free_cmd(cmd); |
e48354ce NB |
3899 | |
3900 | spin_lock_bh(&conn->cmd_lock); | |
3901 | } | |
3902 | spin_unlock_bh(&conn->cmd_lock); | |
3903 | } | |
3904 | ||
3905 | static void iscsit_stop_timers_for_cmds( | |
3906 | struct iscsi_conn *conn) | |
3907 | { | |
3908 | struct iscsi_cmd *cmd; | |
3909 | ||
3910 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 3911 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
3912 | if (cmd->data_direction == DMA_TO_DEVICE) |
3913 | iscsit_stop_dataout_timer(cmd); | |
3914 | } | |
3915 | spin_unlock_bh(&conn->cmd_lock); | |
3916 | } | |
3917 | ||
3918 | int iscsit_close_connection( | |
3919 | struct iscsi_conn *conn) | |
3920 | { | |
3921 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
3922 | struct iscsi_session *sess = conn->sess; | |
3923 | ||
3924 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
3925 | " %u\n", conn->cid, sess->sid); | |
3926 | /* | |
3927 | * Always up conn_logout_comp just in case the RX Thread is sleeping | |
3928 | * and the logout response never got sent because the connection | |
3929 | * failed. | |
3930 | */ | |
3931 | complete(&conn->conn_logout_comp); | |
3932 | ||
3933 | iscsi_release_thread_set(conn); | |
3934 | ||
3935 | iscsit_stop_timers_for_cmds(conn); | |
3936 | iscsit_stop_nopin_response_timer(conn); | |
3937 | iscsit_stop_nopin_timer(conn); | |
3938 | iscsit_free_queue_reqs_for_conn(conn); | |
3939 | ||
3940 | /* | |
3941 | * During Connection recovery drop unacknowledged out of order | |
3942 | * commands for this connection, and prepare the other commands | |
3943 | * for realligence. | |
3944 | * | |
3945 | * During normal operation clear the out of order commands (but | |
3946 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
3947 | * struct iscsi_cmds. | |
3948 | */ | |
3949 | if (atomic_read(&conn->connection_recovery)) { | |
3950 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
3951 | iscsit_prepare_cmds_for_realligance(conn); | |
3952 | } else { | |
3953 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
3954 | iscsit_release_commands_from_conn(conn); | |
3955 | } | |
3956 | ||
3957 | /* | |
3958 | * Handle decrementing session or connection usage count if | |
3959 | * a logout response was not able to be sent because the | |
3960 | * connection failed. Fall back to Session Recovery here. | |
3961 | */ | |
3962 | if (atomic_read(&conn->conn_logout_remove)) { | |
3963 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
3964 | iscsit_dec_conn_usage_count(conn); | |
3965 | iscsit_dec_session_usage_count(sess); | |
3966 | } | |
3967 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
3968 | iscsit_dec_conn_usage_count(conn); | |
3969 | ||
3970 | atomic_set(&conn->conn_logout_remove, 0); | |
3971 | atomic_set(&sess->session_reinstatement, 0); | |
3972 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
3973 | } | |
3974 | ||
3975 | spin_lock_bh(&sess->conn_lock); | |
3976 | list_del(&conn->conn_list); | |
3977 | ||
3978 | /* | |
3979 | * Attempt to let the Initiator know this connection failed by | |
3980 | * sending an Connection Dropped Async Message on another | |
3981 | * active connection. | |
3982 | */ | |
3983 | if (atomic_read(&conn->connection_recovery)) | |
3984 | iscsit_build_conn_drop_async_message(conn); | |
3985 | ||
3986 | spin_unlock_bh(&sess->conn_lock); | |
3987 | ||
3988 | /* | |
3989 | * If connection reinstatement is being performed on this connection, | |
3990 | * up the connection reinstatement semaphore that is being blocked on | |
3991 | * in iscsit_cause_connection_reinstatement(). | |
3992 | */ | |
3993 | spin_lock_bh(&conn->state_lock); | |
3994 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
3995 | spin_unlock_bh(&conn->state_lock); | |
3996 | complete(&conn->conn_wait_comp); | |
3997 | wait_for_completion(&conn->conn_post_wait_comp); | |
3998 | spin_lock_bh(&conn->state_lock); | |
3999 | } | |
4000 | ||
4001 | /* | |
4002 | * If connection reinstatement is being performed on this connection | |
4003 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4004 | * connection wait rcfr semaphore that is being blocked on | |
4005 | * an iscsit_connection_reinstatement_rcfr(). | |
4006 | */ | |
4007 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4008 | spin_unlock_bh(&conn->state_lock); | |
4009 | complete(&conn->conn_wait_rcfr_comp); | |
4010 | wait_for_completion(&conn->conn_post_wait_comp); | |
4011 | spin_lock_bh(&conn->state_lock); | |
4012 | } | |
4013 | atomic_set(&conn->connection_reinstatement, 1); | |
4014 | spin_unlock_bh(&conn->state_lock); | |
4015 | ||
4016 | /* | |
4017 | * If any other processes are accessing this connection pointer we | |
4018 | * must wait until they have completed. | |
4019 | */ | |
4020 | iscsit_check_conn_usage_count(conn); | |
4021 | ||
4022 | if (conn->conn_rx_hash.tfm) | |
4023 | crypto_free_hash(conn->conn_rx_hash.tfm); | |
4024 | if (conn->conn_tx_hash.tfm) | |
4025 | crypto_free_hash(conn->conn_tx_hash.tfm); | |
4026 | ||
4027 | if (conn->conn_cpumask) | |
4028 | free_cpumask_var(conn->conn_cpumask); | |
4029 | ||
4030 | kfree(conn->conn_ops); | |
4031 | conn->conn_ops = NULL; | |
4032 | ||
bf6932f4 | 4033 | if (conn->sock) |
e48354ce | 4034 | sock_release(conn->sock); |
e48354ce NB |
4035 | conn->thread_set = NULL; |
4036 | ||
4037 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); | |
4038 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4039 | kfree(conn); | |
4040 | ||
4041 | spin_lock_bh(&sess->conn_lock); | |
4042 | atomic_dec(&sess->nconn); | |
4043 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4044 | " %s\n", atomic_read(&sess->nconn), | |
4045 | sess->sess_ops->InitiatorName); | |
4046 | /* | |
4047 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4048 | * Session that they all fail. | |
4049 | */ | |
4050 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4051 | !atomic_read(&sess->session_logout)) | |
4052 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4053 | ||
4054 | /* | |
4055 | * If this was not the last connection in the session, and we are | |
4056 | * performing session reinstatement or falling back to ERL=0, call | |
4057 | * iscsit_stop_session() without sleeping to shutdown the other | |
4058 | * active connections. | |
4059 | */ | |
4060 | if (atomic_read(&sess->nconn)) { | |
4061 | if (!atomic_read(&sess->session_reinstatement) && | |
4062 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4063 | spin_unlock_bh(&sess->conn_lock); | |
4064 | return 0; | |
4065 | } | |
4066 | if (!atomic_read(&sess->session_stop_active)) { | |
4067 | atomic_set(&sess->session_stop_active, 1); | |
4068 | spin_unlock_bh(&sess->conn_lock); | |
4069 | iscsit_stop_session(sess, 0, 0); | |
4070 | return 0; | |
4071 | } | |
4072 | spin_unlock_bh(&sess->conn_lock); | |
4073 | return 0; | |
4074 | } | |
4075 | ||
4076 | /* | |
4077 | * If this was the last connection in the session and one of the | |
4078 | * following is occurring: | |
4079 | * | |
4080 | * Session Reinstatement is not being performed, and are falling back | |
4081 | * to ERL=0 call iscsit_close_session(). | |
4082 | * | |
4083 | * Session Logout was requested. iscsit_close_session() will be called | |
4084 | * elsewhere. | |
4085 | * | |
4086 | * Session Continuation is not being performed, start the Time2Retain | |
4087 | * handler and check if sleep_on_sess_wait_sem is active. | |
4088 | */ | |
4089 | if (!atomic_read(&sess->session_reinstatement) && | |
4090 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4091 | spin_unlock_bh(&sess->conn_lock); | |
99367f01 | 4092 | target_put_session(sess->se_sess); |
e48354ce NB |
4093 | |
4094 | return 0; | |
4095 | } else if (atomic_read(&sess->session_logout)) { | |
4096 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4097 | sess->session_state = TARG_SESS_STATE_FREE; | |
4098 | spin_unlock_bh(&sess->conn_lock); | |
4099 | ||
4100 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4101 | complete(&sess->session_wait_comp); | |
4102 | ||
4103 | return 0; | |
4104 | } else { | |
4105 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4106 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4107 | ||
4108 | if (!atomic_read(&sess->session_continuation)) { | |
4109 | spin_unlock_bh(&sess->conn_lock); | |
4110 | iscsit_start_time2retain_handler(sess); | |
4111 | } else | |
4112 | spin_unlock_bh(&sess->conn_lock); | |
4113 | ||
4114 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4115 | complete(&sess->session_wait_comp); | |
4116 | ||
4117 | return 0; | |
4118 | } | |
4119 | spin_unlock_bh(&sess->conn_lock); | |
4120 | ||
4121 | return 0; | |
4122 | } | |
4123 | ||
4124 | int iscsit_close_session(struct iscsi_session *sess) | |
4125 | { | |
4126 | struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); | |
4127 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4128 | ||
4129 | if (atomic_read(&sess->nconn)) { | |
4130 | pr_err("%d connection(s) still exist for iSCSI session" | |
4131 | " to %s\n", atomic_read(&sess->nconn), | |
4132 | sess->sess_ops->InitiatorName); | |
4133 | BUG(); | |
4134 | } | |
4135 | ||
4136 | spin_lock_bh(&se_tpg->session_lock); | |
4137 | atomic_set(&sess->session_logout, 1); | |
4138 | atomic_set(&sess->session_reinstatement, 1); | |
4139 | iscsit_stop_time2retain_timer(sess); | |
4140 | spin_unlock_bh(&se_tpg->session_lock); | |
4141 | ||
4142 | /* | |
4143 | * transport_deregister_session_configfs() will clear the | |
4144 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4145 | * can be setting it again with __transport_register_session() in | |
4146 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4147 | * completes in iscsi_np context. | |
4148 | */ | |
4149 | transport_deregister_session_configfs(sess->se_sess); | |
4150 | ||
4151 | /* | |
4152 | * If any other processes are accessing this session pointer we must | |
4153 | * wait until they have completed. If we are in an interrupt (the | |
4154 | * time2retain handler) and contain and active session usage count we | |
4155 | * restart the timer and exit. | |
4156 | */ | |
4157 | if (!in_interrupt()) { | |
4158 | if (iscsit_check_session_usage_count(sess) == 1) | |
4159 | iscsit_stop_session(sess, 1, 1); | |
4160 | } else { | |
4161 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4162 | atomic_set(&sess->session_logout, 0); | |
4163 | iscsit_start_time2retain_handler(sess); | |
4164 | return 0; | |
4165 | } | |
4166 | } | |
4167 | ||
4168 | transport_deregister_session(sess->se_sess); | |
4169 | ||
4170 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4171 | iscsit_free_connection_recovery_entires(sess); | |
4172 | ||
4173 | iscsit_free_all_ooo_cmdsns(sess); | |
4174 | ||
4175 | spin_lock_bh(&se_tpg->session_lock); | |
4176 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4177 | sess->session_state = TARG_SESS_STATE_FREE; | |
4178 | pr_debug("Released iSCSI session from node: %s\n", | |
4179 | sess->sess_ops->InitiatorName); | |
4180 | tpg->nsessions--; | |
4181 | if (tpg->tpg_tiqn) | |
4182 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4183 | ||
4184 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4185 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4186 | ||
4187 | spin_lock(&sess_idr_lock); | |
4188 | idr_remove(&sess_idr, sess->session_index); | |
4189 | spin_unlock(&sess_idr_lock); | |
4190 | ||
4191 | kfree(sess->sess_ops); | |
4192 | sess->sess_ops = NULL; | |
4193 | spin_unlock_bh(&se_tpg->session_lock); | |
4194 | ||
4195 | kfree(sess); | |
4196 | return 0; | |
4197 | } | |
4198 | ||
4199 | static void iscsit_logout_post_handler_closesession( | |
4200 | struct iscsi_conn *conn) | |
4201 | { | |
4202 | struct iscsi_session *sess = conn->sess; | |
4203 | ||
4204 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4205 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4206 | ||
4207 | atomic_set(&conn->conn_logout_remove, 0); | |
4208 | complete(&conn->conn_logout_comp); | |
4209 | ||
4210 | iscsit_dec_conn_usage_count(conn); | |
4211 | iscsit_stop_session(sess, 1, 1); | |
4212 | iscsit_dec_session_usage_count(sess); | |
99367f01 | 4213 | target_put_session(sess->se_sess); |
e48354ce NB |
4214 | } |
4215 | ||
4216 | static void iscsit_logout_post_handler_samecid( | |
4217 | struct iscsi_conn *conn) | |
4218 | { | |
4219 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4220 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4221 | ||
4222 | atomic_set(&conn->conn_logout_remove, 0); | |
4223 | complete(&conn->conn_logout_comp); | |
4224 | ||
4225 | iscsit_cause_connection_reinstatement(conn, 1); | |
4226 | iscsit_dec_conn_usage_count(conn); | |
4227 | } | |
4228 | ||
4229 | static void iscsit_logout_post_handler_diffcid( | |
4230 | struct iscsi_conn *conn, | |
4231 | u16 cid) | |
4232 | { | |
4233 | struct iscsi_conn *l_conn; | |
4234 | struct iscsi_session *sess = conn->sess; | |
4235 | ||
4236 | if (!sess) | |
4237 | return; | |
4238 | ||
4239 | spin_lock_bh(&sess->conn_lock); | |
4240 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4241 | if (l_conn->cid == cid) { | |
4242 | iscsit_inc_conn_usage_count(l_conn); | |
4243 | break; | |
4244 | } | |
4245 | } | |
4246 | spin_unlock_bh(&sess->conn_lock); | |
4247 | ||
4248 | if (!l_conn) | |
4249 | return; | |
4250 | ||
4251 | if (l_conn->sock) | |
4252 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4253 | ||
4254 | spin_lock_bh(&l_conn->state_lock); | |
4255 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4256 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4257 | spin_unlock_bh(&l_conn->state_lock); | |
4258 | ||
4259 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4260 | iscsit_dec_conn_usage_count(l_conn); | |
4261 | } | |
4262 | ||
4263 | /* | |
4264 | * Return of 0 causes the TX thread to restart. | |
4265 | */ | |
4266 | static int iscsit_logout_post_handler( | |
4267 | struct iscsi_cmd *cmd, | |
4268 | struct iscsi_conn *conn) | |
4269 | { | |
4270 | int ret = 0; | |
4271 | ||
4272 | switch (cmd->logout_reason) { | |
4273 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4274 | switch (cmd->logout_response) { | |
4275 | case ISCSI_LOGOUT_SUCCESS: | |
4276 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4277 | default: | |
4278 | iscsit_logout_post_handler_closesession(conn); | |
4279 | break; | |
4280 | } | |
4281 | ret = 0; | |
4282 | break; | |
4283 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4284 | if (conn->cid == cmd->logout_cid) { | |
4285 | switch (cmd->logout_response) { | |
4286 | case ISCSI_LOGOUT_SUCCESS: | |
4287 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4288 | default: | |
4289 | iscsit_logout_post_handler_samecid(conn); | |
4290 | break; | |
4291 | } | |
4292 | ret = 0; | |
4293 | } else { | |
4294 | switch (cmd->logout_response) { | |
4295 | case ISCSI_LOGOUT_SUCCESS: | |
4296 | iscsit_logout_post_handler_diffcid(conn, | |
4297 | cmd->logout_cid); | |
4298 | break; | |
4299 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4300 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4301 | default: | |
4302 | break; | |
4303 | } | |
4304 | ret = 1; | |
4305 | } | |
4306 | break; | |
4307 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4308 | switch (cmd->logout_response) { | |
4309 | case ISCSI_LOGOUT_SUCCESS: | |
4310 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4311 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4312 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4313 | default: | |
4314 | break; | |
4315 | } | |
4316 | ret = 1; | |
4317 | break; | |
4318 | default: | |
4319 | break; | |
4320 | ||
4321 | } | |
4322 | return ret; | |
4323 | } | |
4324 | ||
4325 | void iscsit_fail_session(struct iscsi_session *sess) | |
4326 | { | |
4327 | struct iscsi_conn *conn; | |
4328 | ||
4329 | spin_lock_bh(&sess->conn_lock); | |
4330 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4331 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4332 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4333 | } | |
4334 | spin_unlock_bh(&sess->conn_lock); | |
4335 | ||
4336 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4337 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4338 | } | |
4339 | ||
4340 | int iscsit_free_session(struct iscsi_session *sess) | |
4341 | { | |
4342 | u16 conn_count = atomic_read(&sess->nconn); | |
4343 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4344 | int is_last; | |
4345 | ||
4346 | spin_lock_bh(&sess->conn_lock); | |
4347 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4348 | ||
4349 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4350 | conn_list) { | |
4351 | if (conn_count == 0) | |
4352 | break; | |
4353 | ||
4354 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4355 | is_last = 1; | |
4356 | } else { | |
4357 | iscsit_inc_conn_usage_count(conn_tmp); | |
4358 | is_last = 0; | |
4359 | } | |
4360 | iscsit_inc_conn_usage_count(conn); | |
4361 | ||
4362 | spin_unlock_bh(&sess->conn_lock); | |
4363 | iscsit_cause_connection_reinstatement(conn, 1); | |
4364 | spin_lock_bh(&sess->conn_lock); | |
4365 | ||
4366 | iscsit_dec_conn_usage_count(conn); | |
4367 | if (is_last == 0) | |
4368 | iscsit_dec_conn_usage_count(conn_tmp); | |
4369 | ||
4370 | conn_count--; | |
4371 | } | |
4372 | ||
4373 | if (atomic_read(&sess->nconn)) { | |
4374 | spin_unlock_bh(&sess->conn_lock); | |
4375 | wait_for_completion(&sess->session_wait_comp); | |
4376 | } else | |
4377 | spin_unlock_bh(&sess->conn_lock); | |
4378 | ||
99367f01 | 4379 | target_put_session(sess->se_sess); |
e48354ce NB |
4380 | return 0; |
4381 | } | |
4382 | ||
4383 | void iscsit_stop_session( | |
4384 | struct iscsi_session *sess, | |
4385 | int session_sleep, | |
4386 | int connection_sleep) | |
4387 | { | |
4388 | u16 conn_count = atomic_read(&sess->nconn); | |
4389 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4390 | int is_last; | |
4391 | ||
4392 | spin_lock_bh(&sess->conn_lock); | |
4393 | if (session_sleep) | |
4394 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4395 | ||
4396 | if (connection_sleep) { | |
4397 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4398 | conn_list) { | |
4399 | if (conn_count == 0) | |
4400 | break; | |
4401 | ||
4402 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4403 | is_last = 1; | |
4404 | } else { | |
4405 | iscsit_inc_conn_usage_count(conn_tmp); | |
4406 | is_last = 0; | |
4407 | } | |
4408 | iscsit_inc_conn_usage_count(conn); | |
4409 | ||
4410 | spin_unlock_bh(&sess->conn_lock); | |
4411 | iscsit_cause_connection_reinstatement(conn, 1); | |
4412 | spin_lock_bh(&sess->conn_lock); | |
4413 | ||
4414 | iscsit_dec_conn_usage_count(conn); | |
4415 | if (is_last == 0) | |
4416 | iscsit_dec_conn_usage_count(conn_tmp); | |
4417 | conn_count--; | |
4418 | } | |
4419 | } else { | |
4420 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4421 | iscsit_cause_connection_reinstatement(conn, 0); | |
4422 | } | |
4423 | ||
4424 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4425 | spin_unlock_bh(&sess->conn_lock); | |
4426 | wait_for_completion(&sess->session_wait_comp); | |
4427 | } else | |
4428 | spin_unlock_bh(&sess->conn_lock); | |
4429 | } | |
4430 | ||
4431 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4432 | { | |
4433 | struct iscsi_session *sess; | |
4434 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4435 | struct se_session *se_sess, *se_sess_tmp; | |
4436 | int session_count = 0; | |
4437 | ||
4438 | spin_lock_bh(&se_tpg->session_lock); | |
4439 | if (tpg->nsessions && !force) { | |
4440 | spin_unlock_bh(&se_tpg->session_lock); | |
4441 | return -1; | |
4442 | } | |
4443 | ||
4444 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4445 | sess_list) { | |
4446 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4447 | ||
4448 | spin_lock(&sess->conn_lock); | |
4449 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4450 | atomic_read(&sess->session_logout) || | |
4451 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4452 | spin_unlock(&sess->conn_lock); | |
4453 | continue; | |
4454 | } | |
4455 | atomic_set(&sess->session_reinstatement, 1); | |
4456 | spin_unlock(&sess->conn_lock); | |
4457 | spin_unlock_bh(&se_tpg->session_lock); | |
4458 | ||
4459 | iscsit_free_session(sess); | |
4460 | spin_lock_bh(&se_tpg->session_lock); | |
4461 | ||
4462 | session_count++; | |
4463 | } | |
4464 | spin_unlock_bh(&se_tpg->session_lock); | |
4465 | ||
4466 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4467 | " Group: %hu\n", session_count, tpg->tpgt); | |
4468 | return 0; | |
4469 | } | |
4470 | ||
4471 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4472 | MODULE_VERSION("4.1.x"); | |
4473 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4474 | MODULE_LICENSE("GPL"); | |
4475 | ||
4476 | module_init(iscsi_target_init_module); | |
4477 | module_exit(iscsi_target_cleanup_module); |