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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> | |
30 | #include <target/target_core_base.h> | |
c4795fb2 | 31 | #include <target/target_core_fabric.h> |
e48354ce NB |
32 | |
33 | #include "iscsi_target_core.h" | |
34 | #include "iscsi_target_parameters.h" | |
35 | #include "iscsi_target_seq_pdu_list.h" | |
36 | #include "iscsi_target_tq.h" | |
37 | #include "iscsi_target_configfs.h" | |
38 | #include "iscsi_target_datain_values.h" | |
39 | #include "iscsi_target_erl0.h" | |
40 | #include "iscsi_target_erl1.h" | |
41 | #include "iscsi_target_erl2.h" | |
42 | #include "iscsi_target_login.h" | |
43 | #include "iscsi_target_tmr.h" | |
44 | #include "iscsi_target_tpg.h" | |
45 | #include "iscsi_target_util.h" | |
46 | #include "iscsi_target.h" | |
47 | #include "iscsi_target_device.h" | |
48 | #include "iscsi_target_stat.h" | |
49 | ||
50 | static LIST_HEAD(g_tiqn_list); | |
51 | static LIST_HEAD(g_np_list); | |
52 | static DEFINE_SPINLOCK(tiqn_lock); | |
53 | static DEFINE_SPINLOCK(np_lock); | |
54 | ||
55 | static struct idr tiqn_idr; | |
56 | struct idr sess_idr; | |
57 | struct mutex auth_id_lock; | |
58 | spinlock_t sess_idr_lock; | |
59 | ||
60 | struct iscsit_global *iscsit_global; | |
61 | ||
62 | struct kmem_cache *lio_cmd_cache; | |
63 | struct kmem_cache *lio_qr_cache; | |
64 | struct kmem_cache *lio_dr_cache; | |
65 | struct kmem_cache *lio_ooo_cache; | |
66 | struct kmem_cache *lio_r2t_cache; | |
67 | ||
68 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
69 | unsigned char *buf, u32); | |
70 | static int iscsit_logout_post_handler(struct iscsi_cmd *, struct iscsi_conn *); | |
71 | ||
72 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
73 | { | |
74 | struct iscsi_tiqn *tiqn = NULL; | |
75 | ||
76 | spin_lock(&tiqn_lock); | |
77 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
78 | if (!strcmp(tiqn->tiqn, buf)) { | |
79 | ||
80 | spin_lock(&tiqn->tiqn_state_lock); | |
81 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
82 | tiqn->tiqn_access_count++; | |
83 | spin_unlock(&tiqn->tiqn_state_lock); | |
84 | spin_unlock(&tiqn_lock); | |
85 | return tiqn; | |
86 | } | |
87 | spin_unlock(&tiqn->tiqn_state_lock); | |
88 | } | |
89 | } | |
90 | spin_unlock(&tiqn_lock); | |
91 | ||
92 | return NULL; | |
93 | } | |
94 | ||
95 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
96 | { | |
97 | spin_lock(&tiqn->tiqn_state_lock); | |
98 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
99 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
100 | spin_unlock(&tiqn->tiqn_state_lock); | |
101 | return 0; | |
102 | } | |
103 | spin_unlock(&tiqn->tiqn_state_lock); | |
104 | ||
105 | return -1; | |
106 | } | |
107 | ||
108 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
109 | { | |
110 | spin_lock(&tiqn->tiqn_state_lock); | |
111 | tiqn->tiqn_access_count--; | |
112 | spin_unlock(&tiqn->tiqn_state_lock); | |
113 | } | |
114 | ||
115 | /* | |
116 | * Note that IQN formatting is expected to be done in userspace, and | |
117 | * no explict IQN format checks are done here. | |
118 | */ | |
119 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
120 | { | |
121 | struct iscsi_tiqn *tiqn = NULL; | |
122 | int ret; | |
123 | ||
8f50c7f5 | 124 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
125 | pr_err("Target IQN exceeds %d bytes\n", |
126 | ISCSI_IQN_LEN); | |
127 | return ERR_PTR(-EINVAL); | |
128 | } | |
129 | ||
130 | tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); | |
131 | if (!tiqn) { | |
132 | pr_err("Unable to allocate struct iscsi_tiqn\n"); | |
133 | return ERR_PTR(-ENOMEM); | |
134 | } | |
135 | ||
136 | sprintf(tiqn->tiqn, "%s", buf); | |
137 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
138 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
139 | spin_lock_init(&tiqn->tiqn_state_lock); | |
140 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
141 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
142 | spin_lock_init(&tiqn->login_stats.lock); | |
143 | spin_lock_init(&tiqn->logout_stats.lock); | |
144 | ||
145 | if (!idr_pre_get(&tiqn_idr, GFP_KERNEL)) { | |
146 | pr_err("idr_pre_get() for tiqn_idr failed\n"); | |
147 | kfree(tiqn); | |
148 | return ERR_PTR(-ENOMEM); | |
149 | } | |
150 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; | |
151 | ||
152 | spin_lock(&tiqn_lock); | |
153 | ret = idr_get_new(&tiqn_idr, NULL, &tiqn->tiqn_index); | |
154 | if (ret < 0) { | |
155 | pr_err("idr_get_new() failed for tiqn->tiqn_index\n"); | |
156 | spin_unlock(&tiqn_lock); | |
157 | kfree(tiqn); | |
158 | return ERR_PTR(ret); | |
159 | } | |
160 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); | |
161 | spin_unlock(&tiqn_lock); | |
162 | ||
163 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
164 | ||
165 | return tiqn; | |
166 | ||
167 | } | |
168 | ||
169 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
170 | { | |
171 | /* | |
172 | * Wait for accesses to said struct iscsi_tiqn to end. | |
173 | */ | |
174 | spin_lock(&tiqn->tiqn_state_lock); | |
175 | while (tiqn->tiqn_access_count != 0) { | |
176 | spin_unlock(&tiqn->tiqn_state_lock); | |
177 | msleep(10); | |
178 | spin_lock(&tiqn->tiqn_state_lock); | |
179 | } | |
180 | spin_unlock(&tiqn->tiqn_state_lock); | |
181 | } | |
182 | ||
183 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
184 | { | |
185 | /* | |
186 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
187 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
188 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
189 | * fabric and control code paths. | |
190 | */ | |
191 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
192 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
193 | return; | |
194 | } | |
195 | ||
196 | iscsit_wait_for_tiqn(tiqn); | |
197 | ||
198 | spin_lock(&tiqn_lock); | |
199 | list_del(&tiqn->tiqn_list); | |
200 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
201 | spin_unlock(&tiqn_lock); | |
202 | ||
203 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
204 | tiqn->tiqn); | |
205 | kfree(tiqn); | |
206 | } | |
207 | ||
208 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
209 | { | |
210 | int ret; | |
211 | /* | |
212 | * Determine if the network portal is accepting storage traffic. | |
213 | */ | |
214 | spin_lock_bh(&np->np_thread_lock); | |
215 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
216 | spin_unlock_bh(&np->np_thread_lock); | |
217 | return -1; | |
218 | } | |
219 | if (np->np_login_tpg) { | |
220 | pr_err("np->np_login_tpg() is not NULL!\n"); | |
221 | spin_unlock_bh(&np->np_thread_lock); | |
222 | return -1; | |
223 | } | |
224 | spin_unlock_bh(&np->np_thread_lock); | |
225 | /* | |
226 | * Determine if the portal group is accepting storage traffic. | |
227 | */ | |
228 | spin_lock_bh(&tpg->tpg_state_lock); | |
229 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
230 | spin_unlock_bh(&tpg->tpg_state_lock); | |
231 | return -1; | |
232 | } | |
233 | spin_unlock_bh(&tpg->tpg_state_lock); | |
234 | ||
235 | /* | |
236 | * Here we serialize access across the TIQN+TPG Tuple. | |
237 | */ | |
238 | ret = mutex_lock_interruptible(&tpg->np_login_lock); | |
239 | if ((ret != 0) || signal_pending(current)) | |
240 | return -1; | |
241 | ||
242 | spin_lock_bh(&np->np_thread_lock); | |
243 | np->np_login_tpg = tpg; | |
244 | spin_unlock_bh(&np->np_thread_lock); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
250 | { | |
251 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
252 | ||
253 | spin_lock_bh(&np->np_thread_lock); | |
254 | np->np_login_tpg = NULL; | |
255 | spin_unlock_bh(&np->np_thread_lock); | |
256 | ||
257 | mutex_unlock(&tpg->np_login_lock); | |
258 | ||
259 | if (tiqn) | |
260 | iscsit_put_tiqn_for_login(tiqn); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | static struct iscsi_np *iscsit_get_np( | |
266 | struct __kernel_sockaddr_storage *sockaddr, | |
267 | int network_transport) | |
268 | { | |
269 | struct sockaddr_in *sock_in, *sock_in_e; | |
270 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
271 | struct iscsi_np *np; | |
272 | int ip_match = 0; | |
273 | u16 port; | |
274 | ||
275 | spin_lock_bh(&np_lock); | |
276 | list_for_each_entry(np, &g_np_list, np_list) { | |
277 | spin_lock(&np->np_thread_lock); | |
278 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
279 | spin_unlock(&np->np_thread_lock); | |
280 | continue; | |
281 | } | |
282 | ||
283 | if (sockaddr->ss_family == AF_INET6) { | |
284 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
285 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
286 | ||
8359cf43 JE |
287 | if (!memcmp(&sock_in6->sin6_addr.in6_u, |
288 | &sock_in6_e->sin6_addr.in6_u, | |
e48354ce NB |
289 | sizeof(struct in6_addr))) |
290 | ip_match = 1; | |
291 | ||
292 | port = ntohs(sock_in6->sin6_port); | |
293 | } else { | |
294 | sock_in = (struct sockaddr_in *)sockaddr; | |
295 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
296 | ||
297 | if (sock_in->sin_addr.s_addr == | |
298 | sock_in_e->sin_addr.s_addr) | |
299 | ip_match = 1; | |
300 | ||
301 | port = ntohs(sock_in->sin_port); | |
302 | } | |
303 | ||
304 | if ((ip_match == 1) && (np->np_port == port) && | |
305 | (np->np_network_transport == network_transport)) { | |
306 | /* | |
307 | * Increment the np_exports reference count now to | |
308 | * prevent iscsit_del_np() below from being called | |
309 | * while iscsi_tpg_add_network_portal() is called. | |
310 | */ | |
311 | np->np_exports++; | |
312 | spin_unlock(&np->np_thread_lock); | |
313 | spin_unlock_bh(&np_lock); | |
314 | return np; | |
315 | } | |
316 | spin_unlock(&np->np_thread_lock); | |
317 | } | |
318 | spin_unlock_bh(&np_lock); | |
319 | ||
320 | return NULL; | |
321 | } | |
322 | ||
323 | struct iscsi_np *iscsit_add_np( | |
324 | struct __kernel_sockaddr_storage *sockaddr, | |
325 | char *ip_str, | |
326 | int network_transport) | |
327 | { | |
328 | struct sockaddr_in *sock_in; | |
329 | struct sockaddr_in6 *sock_in6; | |
330 | struct iscsi_np *np; | |
331 | int ret; | |
332 | /* | |
333 | * Locate the existing struct iscsi_np if already active.. | |
334 | */ | |
335 | np = iscsit_get_np(sockaddr, network_transport); | |
336 | if (np) | |
337 | return np; | |
338 | ||
339 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
340 | if (!np) { | |
341 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
342 | return ERR_PTR(-ENOMEM); | |
343 | } | |
344 | ||
345 | np->np_flags |= NPF_IP_NETWORK; | |
346 | if (sockaddr->ss_family == AF_INET6) { | |
347 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
348 | snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); | |
349 | np->np_port = ntohs(sock_in6->sin6_port); | |
350 | } else { | |
351 | sock_in = (struct sockaddr_in *)sockaddr; | |
352 | sprintf(np->np_ip, "%s", ip_str); | |
353 | np->np_port = ntohs(sock_in->sin_port); | |
354 | } | |
355 | ||
356 | np->np_network_transport = network_transport; | |
357 | spin_lock_init(&np->np_thread_lock); | |
358 | init_completion(&np->np_restart_comp); | |
359 | INIT_LIST_HEAD(&np->np_list); | |
360 | ||
361 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
362 | if (ret != 0) { | |
363 | kfree(np); | |
364 | return ERR_PTR(ret); | |
365 | } | |
366 | ||
367 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
368 | if (IS_ERR(np->np_thread)) { | |
369 | pr_err("Unable to create kthread: iscsi_np\n"); | |
370 | ret = PTR_ERR(np->np_thread); | |
371 | kfree(np); | |
372 | return ERR_PTR(ret); | |
373 | } | |
374 | /* | |
375 | * Increment the np_exports reference count now to prevent | |
376 | * iscsit_del_np() below from being run while a new call to | |
377 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
378 | * active. We don't need to hold np->np_thread_lock at this | |
379 | * point because iscsi_np has not been added to g_np_list yet. | |
380 | */ | |
381 | np->np_exports = 1; | |
382 | ||
383 | spin_lock_bh(&np_lock); | |
384 | list_add_tail(&np->np_list, &g_np_list); | |
385 | spin_unlock_bh(&np_lock); | |
386 | ||
387 | pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", | |
388 | np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? | |
389 | "TCP" : "SCTP"); | |
390 | ||
391 | return np; | |
392 | } | |
393 | ||
394 | int iscsit_reset_np_thread( | |
395 | struct iscsi_np *np, | |
396 | struct iscsi_tpg_np *tpg_np, | |
397 | struct iscsi_portal_group *tpg) | |
398 | { | |
399 | spin_lock_bh(&np->np_thread_lock); | |
400 | if (tpg && tpg_np) { | |
401 | /* | |
402 | * The reset operation need only be performed when the | |
403 | * passed struct iscsi_portal_group has a login in progress | |
404 | * to one of the network portals. | |
405 | */ | |
406 | if (tpg_np->tpg_np->np_login_tpg != tpg) { | |
407 | spin_unlock_bh(&np->np_thread_lock); | |
408 | return 0; | |
409 | } | |
410 | } | |
411 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { | |
412 | spin_unlock_bh(&np->np_thread_lock); | |
413 | return 0; | |
414 | } | |
415 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
416 | ||
417 | if (np->np_thread) { | |
418 | spin_unlock_bh(&np->np_thread_lock); | |
419 | send_sig(SIGINT, np->np_thread, 1); | |
420 | wait_for_completion(&np->np_restart_comp); | |
421 | spin_lock_bh(&np->np_thread_lock); | |
422 | } | |
423 | spin_unlock_bh(&np->np_thread_lock); | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | int iscsit_del_np_comm(struct iscsi_np *np) | |
429 | { | |
430 | if (!np->np_socket) | |
431 | return 0; | |
432 | ||
433 | /* | |
434 | * Some network transports allocate their own struct sock->file, | |
435 | * see if we need to free any additional allocated resources. | |
436 | */ | |
437 | if (np->np_flags & NPF_SCTP_STRUCT_FILE) { | |
438 | kfree(np->np_socket->file); | |
439 | np->np_socket->file = NULL; | |
440 | } | |
441 | ||
442 | sock_release(np->np_socket); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | int iscsit_del_np(struct iscsi_np *np) | |
447 | { | |
448 | spin_lock_bh(&np->np_thread_lock); | |
449 | np->np_exports--; | |
450 | if (np->np_exports) { | |
451 | spin_unlock_bh(&np->np_thread_lock); | |
452 | return 0; | |
453 | } | |
454 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
455 | spin_unlock_bh(&np->np_thread_lock); | |
456 | ||
457 | if (np->np_thread) { | |
458 | /* | |
459 | * We need to send the signal to wakeup Linux/Net | |
460 | * which may be sleeping in sock_accept().. | |
461 | */ | |
462 | send_sig(SIGINT, np->np_thread, 1); | |
463 | kthread_stop(np->np_thread); | |
464 | } | |
465 | iscsit_del_np_comm(np); | |
466 | ||
467 | spin_lock_bh(&np_lock); | |
468 | list_del(&np->np_list); | |
469 | spin_unlock_bh(&np_lock); | |
470 | ||
471 | pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", | |
472 | np->np_ip, np->np_port, (np->np_network_transport == ISCSI_TCP) ? | |
473 | "TCP" : "SCTP"); | |
474 | ||
475 | kfree(np); | |
476 | return 0; | |
477 | } | |
478 | ||
479 | static int __init iscsi_target_init_module(void) | |
480 | { | |
481 | int ret = 0; | |
482 | ||
483 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
484 | ||
485 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
486 | if (!iscsit_global) { | |
487 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
488 | return -1; | |
489 | } | |
490 | mutex_init(&auth_id_lock); | |
491 | spin_lock_init(&sess_idr_lock); | |
492 | idr_init(&tiqn_idr); | |
493 | idr_init(&sess_idr); | |
494 | ||
495 | ret = iscsi_target_register_configfs(); | |
496 | if (ret < 0) | |
497 | goto out; | |
498 | ||
499 | ret = iscsi_thread_set_init(); | |
500 | if (ret < 0) | |
501 | goto configfs_out; | |
502 | ||
503 | if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != | |
504 | TARGET_THREAD_SET_COUNT) { | |
505 | pr_err("iscsi_allocate_thread_sets() returned" | |
506 | " unexpected value!\n"); | |
507 | goto ts_out1; | |
508 | } | |
509 | ||
510 | lio_cmd_cache = kmem_cache_create("lio_cmd_cache", | |
511 | sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd), | |
512 | 0, NULL); | |
513 | if (!lio_cmd_cache) { | |
514 | pr_err("Unable to kmem_cache_create() for" | |
515 | " lio_cmd_cache\n"); | |
516 | goto ts_out2; | |
517 | } | |
518 | ||
519 | lio_qr_cache = kmem_cache_create("lio_qr_cache", | |
520 | sizeof(struct iscsi_queue_req), | |
521 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
522 | if (!lio_qr_cache) { | |
523 | pr_err("nable to kmem_cache_create() for" | |
524 | " lio_qr_cache\n"); | |
525 | goto cmd_out; | |
526 | } | |
527 | ||
528 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
529 | sizeof(struct iscsi_datain_req), | |
530 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
531 | if (!lio_dr_cache) { | |
532 | pr_err("Unable to kmem_cache_create() for" | |
533 | " lio_dr_cache\n"); | |
534 | goto qr_out; | |
535 | } | |
536 | ||
537 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
538 | sizeof(struct iscsi_ooo_cmdsn), | |
539 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
540 | if (!lio_ooo_cache) { | |
541 | pr_err("Unable to kmem_cache_create() for" | |
542 | " lio_ooo_cache\n"); | |
543 | goto dr_out; | |
544 | } | |
545 | ||
546 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
547 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
548 | 0, NULL); | |
549 | if (!lio_r2t_cache) { | |
550 | pr_err("Unable to kmem_cache_create() for" | |
551 | " lio_r2t_cache\n"); | |
552 | goto ooo_out; | |
553 | } | |
554 | ||
555 | if (iscsit_load_discovery_tpg() < 0) | |
556 | goto r2t_out; | |
557 | ||
558 | return ret; | |
559 | r2t_out: | |
560 | kmem_cache_destroy(lio_r2t_cache); | |
561 | ooo_out: | |
562 | kmem_cache_destroy(lio_ooo_cache); | |
563 | dr_out: | |
564 | kmem_cache_destroy(lio_dr_cache); | |
565 | qr_out: | |
566 | kmem_cache_destroy(lio_qr_cache); | |
567 | cmd_out: | |
568 | kmem_cache_destroy(lio_cmd_cache); | |
569 | ts_out2: | |
570 | iscsi_deallocate_thread_sets(); | |
571 | ts_out1: | |
572 | iscsi_thread_set_free(); | |
573 | configfs_out: | |
574 | iscsi_target_deregister_configfs(); | |
575 | out: | |
576 | kfree(iscsit_global); | |
577 | return -ENOMEM; | |
578 | } | |
579 | ||
580 | static void __exit iscsi_target_cleanup_module(void) | |
581 | { | |
582 | iscsi_deallocate_thread_sets(); | |
583 | iscsi_thread_set_free(); | |
584 | iscsit_release_discovery_tpg(); | |
585 | kmem_cache_destroy(lio_cmd_cache); | |
586 | kmem_cache_destroy(lio_qr_cache); | |
587 | kmem_cache_destroy(lio_dr_cache); | |
588 | kmem_cache_destroy(lio_ooo_cache); | |
589 | kmem_cache_destroy(lio_r2t_cache); | |
590 | ||
591 | iscsi_target_deregister_configfs(); | |
592 | ||
593 | kfree(iscsit_global); | |
594 | } | |
595 | ||
596 | int iscsit_add_reject( | |
597 | u8 reason, | |
598 | int fail_conn, | |
599 | unsigned char *buf, | |
600 | struct iscsi_conn *conn) | |
601 | { | |
602 | struct iscsi_cmd *cmd; | |
603 | struct iscsi_reject *hdr; | |
604 | int ret; | |
605 | ||
606 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
607 | if (!cmd) | |
608 | return -1; | |
609 | ||
610 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
611 | if (fail_conn) | |
612 | cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; | |
613 | ||
614 | hdr = (struct iscsi_reject *) cmd->pdu; | |
615 | hdr->reason = reason; | |
616 | ||
1c3d5794 | 617 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
618 | if (!cmd->buf_ptr) { |
619 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
620 | iscsit_release_cmd(cmd); | |
621 | return -1; | |
622 | } | |
e48354ce NB |
623 | |
624 | spin_lock_bh(&conn->cmd_lock); | |
625 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
626 | spin_unlock_bh(&conn->cmd_lock); | |
627 | ||
628 | cmd->i_state = ISTATE_SEND_REJECT; | |
629 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
630 | ||
631 | ret = wait_for_completion_interruptible(&cmd->reject_comp); | |
632 | if (ret != 0) | |
633 | return -1; | |
634 | ||
635 | return (!fail_conn) ? 0 : -1; | |
636 | } | |
637 | ||
638 | int iscsit_add_reject_from_cmd( | |
639 | u8 reason, | |
640 | int fail_conn, | |
641 | int add_to_conn, | |
642 | unsigned char *buf, | |
643 | struct iscsi_cmd *cmd) | |
644 | { | |
645 | struct iscsi_conn *conn; | |
646 | struct iscsi_reject *hdr; | |
647 | int ret; | |
648 | ||
649 | if (!cmd->conn) { | |
650 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
651 | cmd->init_task_tag); | |
652 | return -1; | |
653 | } | |
654 | conn = cmd->conn; | |
655 | ||
656 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
657 | if (fail_conn) | |
658 | cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; | |
659 | ||
660 | hdr = (struct iscsi_reject *) cmd->pdu; | |
661 | hdr->reason = reason; | |
662 | ||
1c3d5794 | 663 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
664 | if (!cmd->buf_ptr) { |
665 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
666 | iscsit_release_cmd(cmd); | |
667 | return -1; | |
668 | } | |
e48354ce NB |
669 | |
670 | if (add_to_conn) { | |
671 | spin_lock_bh(&conn->cmd_lock); | |
672 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
673 | spin_unlock_bh(&conn->cmd_lock); | |
674 | } | |
675 | ||
676 | cmd->i_state = ISTATE_SEND_REJECT; | |
677 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
678 | ||
679 | ret = wait_for_completion_interruptible(&cmd->reject_comp); | |
680 | if (ret != 0) | |
681 | return -1; | |
682 | ||
683 | return (!fail_conn) ? 0 : -1; | |
684 | } | |
685 | ||
686 | /* | |
687 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
688 | * kernel sockets to copy data in/out. This handles both pages and slab-allocated | |
689 | * buffers, since we have been tricky and mapped t_mem_sg to the buffer in | |
690 | * either case (see iscsit_alloc_buffs) | |
691 | */ | |
692 | static int iscsit_map_iovec( | |
693 | struct iscsi_cmd *cmd, | |
694 | struct kvec *iov, | |
695 | u32 data_offset, | |
696 | u32 data_length) | |
697 | { | |
698 | u32 i = 0; | |
699 | struct scatterlist *sg; | |
700 | unsigned int page_off; | |
701 | ||
702 | /* | |
703 | * We have a private mapping of the allocated pages in t_mem_sg. | |
704 | * At this point, we also know each contains a page. | |
705 | */ | |
706 | sg = &cmd->t_mem_sg[data_offset / PAGE_SIZE]; | |
707 | page_off = (data_offset % PAGE_SIZE); | |
708 | ||
709 | cmd->first_data_sg = sg; | |
710 | cmd->first_data_sg_off = page_off; | |
711 | ||
712 | while (data_length) { | |
713 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
714 | ||
715 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
716 | iov[i].iov_len = cur_len; | |
717 | ||
718 | data_length -= cur_len; | |
719 | page_off = 0; | |
720 | sg = sg_next(sg); | |
721 | i++; | |
722 | } | |
723 | ||
724 | cmd->kmapped_nents = i; | |
725 | ||
726 | return i; | |
727 | } | |
728 | ||
729 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
730 | { | |
731 | u32 i; | |
732 | struct scatterlist *sg; | |
733 | ||
734 | sg = cmd->first_data_sg; | |
735 | ||
736 | for (i = 0; i < cmd->kmapped_nents; i++) | |
737 | kunmap(sg_page(&sg[i])); | |
738 | } | |
739 | ||
740 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
741 | { | |
742 | struct iscsi_cmd *cmd; | |
743 | ||
744 | conn->exp_statsn = exp_statsn; | |
745 | ||
746 | spin_lock_bh(&conn->cmd_lock); | |
747 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) { | |
748 | spin_lock(&cmd->istate_lock); | |
749 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
750 | (cmd->stat_sn < exp_statsn)) { | |
751 | cmd->i_state = ISTATE_REMOVE; | |
752 | spin_unlock(&cmd->istate_lock); | |
753 | iscsit_add_cmd_to_immediate_queue(cmd, conn, | |
754 | cmd->i_state); | |
755 | continue; | |
756 | } | |
757 | spin_unlock(&cmd->istate_lock); | |
758 | } | |
759 | spin_unlock_bh(&conn->cmd_lock); | |
760 | } | |
761 | ||
762 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
763 | { | |
764 | u32 iov_count = (cmd->se_cmd.t_data_nents == 0) ? 1 : | |
765 | cmd->se_cmd.t_data_nents; | |
766 | ||
c0427f15 | 767 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
768 | |
769 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
770 | if (!cmd->iov_data) { | |
771 | pr_err("Unable to allocate cmd->iov_data\n"); | |
772 | return -ENOMEM; | |
773 | } | |
774 | ||
775 | cmd->orig_iov_data_count = iov_count; | |
776 | return 0; | |
777 | } | |
778 | ||
779 | static int iscsit_alloc_buffs(struct iscsi_cmd *cmd) | |
780 | { | |
781 | struct scatterlist *sgl; | |
782 | u32 length = cmd->se_cmd.data_length; | |
783 | int nents = DIV_ROUND_UP(length, PAGE_SIZE); | |
784 | int i = 0, ret; | |
785 | /* | |
786 | * If no SCSI payload is present, allocate the default iovecs used for | |
787 | * iSCSI PDU Header | |
788 | */ | |
789 | if (!length) | |
790 | return iscsit_allocate_iovecs(cmd); | |
791 | ||
792 | sgl = kzalloc(sizeof(*sgl) * nents, GFP_KERNEL); | |
793 | if (!sgl) | |
794 | return -ENOMEM; | |
795 | ||
796 | sg_init_table(sgl, nents); | |
797 | ||
798 | while (length) { | |
799 | int buf_size = min_t(int, length, PAGE_SIZE); | |
800 | struct page *page; | |
801 | ||
802 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
803 | if (!page) | |
804 | goto page_alloc_failed; | |
805 | ||
806 | sg_set_page(&sgl[i], page, buf_size, 0); | |
807 | ||
808 | length -= buf_size; | |
809 | i++; | |
810 | } | |
811 | ||
812 | cmd->t_mem_sg = sgl; | |
813 | cmd->t_mem_sg_nents = nents; | |
814 | ||
815 | /* BIDI ops not supported */ | |
816 | ||
817 | /* Tell the core about our preallocated memory */ | |
818 | transport_generic_map_mem_to_cmd(&cmd->se_cmd, sgl, nents, NULL, 0); | |
819 | /* | |
820 | * Allocate iovecs for SCSI payload after transport_generic_map_mem_to_cmd | |
821 | * so that cmd->se_cmd.t_tasks_se_num has been set. | |
822 | */ | |
823 | ret = iscsit_allocate_iovecs(cmd); | |
824 | if (ret < 0) | |
825 | goto page_alloc_failed; | |
826 | ||
827 | return 0; | |
828 | ||
829 | page_alloc_failed: | |
830 | while (i >= 0) { | |
831 | __free_page(sg_page(&sgl[i])); | |
832 | i--; | |
833 | } | |
834 | kfree(cmd->t_mem_sg); | |
835 | cmd->t_mem_sg = NULL; | |
836 | return -ENOMEM; | |
837 | } | |
838 | ||
839 | static int iscsit_handle_scsi_cmd( | |
840 | struct iscsi_conn *conn, | |
841 | unsigned char *buf) | |
842 | { | |
843 | int data_direction, cmdsn_ret = 0, immed_ret, ret, transport_ret; | |
844 | int dump_immediate_data = 0, send_check_condition = 0, payload_length; | |
845 | struct iscsi_cmd *cmd = NULL; | |
846 | struct iscsi_scsi_req *hdr; | |
847 | ||
848 | spin_lock_bh(&conn->sess->session_stats_lock); | |
849 | conn->sess->cmd_pdus++; | |
850 | if (conn->sess->se_sess->se_node_acl) { | |
851 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
852 | conn->sess->se_sess->se_node_acl->num_cmds++; | |
853 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
854 | } | |
855 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
856 | ||
857 | hdr = (struct iscsi_scsi_req *) buf; | |
858 | payload_length = ntoh24(hdr->dlength); | |
859 | hdr->itt = be32_to_cpu(hdr->itt); | |
860 | hdr->data_length = be32_to_cpu(hdr->data_length); | |
861 | hdr->cmdsn = be32_to_cpu(hdr->cmdsn); | |
862 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
863 | ||
864 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
865 | ||
866 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
867 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
868 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
869 | " not set. Bad iSCSI Initiator.\n"); | |
870 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
871 | buf, conn); | |
872 | } | |
873 | ||
874 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
875 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
876 | /* | |
877 | * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2) | |
878 | * that adds support for RESERVE/RELEASE. There is a bug | |
879 | * add with this new functionality that sets R/W bits when | |
880 | * neither CDB carries any READ or WRITE datapayloads. | |
881 | */ | |
882 | if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) { | |
883 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; | |
884 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
885 | goto done; | |
886 | } | |
887 | ||
888 | pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" | |
889 | " set when Expected Data Transfer Length is 0 for" | |
890 | " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]); | |
891 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
892 | buf, conn); | |
893 | } | |
894 | done: | |
895 | ||
896 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
897 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
898 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
899 | " MUST be set if Expected Data Transfer Length is not 0." | |
900 | " Bad iSCSI Initiator\n"); | |
901 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
902 | buf, conn); | |
903 | } | |
904 | ||
905 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
906 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
907 | pr_err("Bidirectional operations not supported!\n"); | |
908 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
909 | buf, conn); | |
910 | } | |
911 | ||
912 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
913 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
914 | " Scsi Command PDU.\n"); | |
915 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
916 | buf, conn); | |
917 | } | |
918 | ||
919 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
920 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
921 | " protocol error.\n", payload_length); | |
922 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
923 | buf, conn); | |
924 | } | |
925 | ||
926 | if ((hdr->data_length == payload_length) && | |
927 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { | |
928 | pr_err("Expected Data Transfer Length and Length of" | |
929 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
930 | " bit is not set protocol error\n"); | |
931 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
932 | buf, conn); | |
933 | } | |
934 | ||
935 | if (payload_length > hdr->data_length) { | |
936 | pr_err("DataSegmentLength: %u is greater than" | |
937 | " EDTL: %u, protocol error.\n", payload_length, | |
938 | hdr->data_length); | |
939 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
940 | buf, conn); | |
941 | } | |
942 | ||
943 | if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { | |
944 | pr_err("DataSegmentLength: %u is greater than" | |
945 | " MaxRecvDataSegmentLength: %u, protocol error.\n", | |
946 | payload_length, conn->conn_ops->MaxRecvDataSegmentLength); | |
947 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
948 | buf, conn); | |
949 | } | |
950 | ||
951 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
952 | pr_err("DataSegmentLength: %u is greater than" | |
953 | " FirstBurstLength: %u, protocol error.\n", | |
954 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
955 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1, | |
956 | buf, conn); | |
957 | } | |
958 | ||
959 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
960 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
961 | DMA_NONE; | |
962 | ||
963 | cmd = iscsit_allocate_se_cmd(conn, hdr->data_length, data_direction, | |
964 | (hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK)); | |
965 | if (!cmd) | |
966 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, | |
967 | buf, conn); | |
968 | ||
969 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
970 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
971 | hdr->cmdsn, hdr->data_length, payload_length, conn->cid); | |
972 | ||
973 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; | |
974 | cmd->i_state = ISTATE_NEW_CMD; | |
975 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
976 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
977 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
978 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
979 | if (cmd->unsolicited_data) | |
980 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
981 | ||
982 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
983 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { | |
984 | spin_lock_bh(&conn->sess->ttt_lock); | |
985 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
986 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
987 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
988 | spin_unlock_bh(&conn->sess->ttt_lock); | |
989 | } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) | |
990 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
991 | cmd->cmd_sn = hdr->cmdsn; | |
992 | cmd->exp_stat_sn = hdr->exp_statsn; | |
993 | cmd->first_burst_len = payload_length; | |
994 | ||
995 | if (cmd->data_direction == DMA_FROM_DEVICE) { | |
996 | struct iscsi_datain_req *dr; | |
997 | ||
998 | dr = iscsit_allocate_datain_req(); | |
999 | if (!dr) | |
1000 | return iscsit_add_reject_from_cmd( | |
1001 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1002 | 1, 1, buf, cmd); | |
1003 | ||
1004 | iscsit_attach_datain_req(cmd, dr); | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * The CDB is going to an se_device_t. | |
1009 | */ | |
1010 | ret = iscsit_get_lun_for_cmd(cmd, hdr->cdb, | |
1011 | get_unaligned_le64(&hdr->lun)); | |
1012 | if (ret < 0) { | |
1013 | if (cmd->se_cmd.scsi_sense_reason == TCM_NON_EXISTENT_LUN) { | |
1014 | pr_debug("Responding to non-acl'ed," | |
1015 | " non-existent or non-exported iSCSI LUN:" | |
1016 | " 0x%016Lx\n", get_unaligned_le64(&hdr->lun)); | |
1017 | } | |
e48354ce NB |
1018 | send_check_condition = 1; |
1019 | goto attach_cmd; | |
1020 | } | |
1021 | /* | |
1022 | * The Initiator Node has access to the LUN (the addressing method | |
1023 | * is handled inside of iscsit_get_lun_for_cmd()). Now it's time to | |
1024 | * allocate 1->N transport tasks (depending on sector count and | |
1025 | * maximum request size the physical HBA(s) can handle. | |
1026 | */ | |
1027 | transport_ret = transport_generic_allocate_tasks(&cmd->se_cmd, hdr->cdb); | |
1028 | if (transport_ret == -ENOMEM) { | |
1029 | return iscsit_add_reject_from_cmd( | |
1030 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1031 | 1, 1, buf, cmd); | |
1032 | } else if (transport_ret == -EINVAL) { | |
1033 | /* | |
1034 | * Unsupported SAM Opcode. CHECK_CONDITION will be sent | |
1035 | * in iscsit_execute_cmd() during the CmdSN OOO Execution | |
1036 | * Mechinism. | |
1037 | */ | |
1038 | send_check_condition = 1; | |
1039 | } else { | |
7e46cf02 NB |
1040 | cmd->data_length = cmd->se_cmd.data_length; |
1041 | ||
e48354ce NB |
1042 | if (iscsit_decide_list_to_build(cmd, payload_length) < 0) |
1043 | return iscsit_add_reject_from_cmd( | |
1044 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1045 | 1, 1, buf, cmd); | |
1046 | } | |
1047 | ||
1048 | attach_cmd: | |
1049 | spin_lock_bh(&conn->cmd_lock); | |
1050 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
1051 | spin_unlock_bh(&conn->cmd_lock); | |
1052 | /* | |
1053 | * Check if we need to delay processing because of ALUA | |
1054 | * Active/NonOptimized primary access state.. | |
1055 | */ | |
1056 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
1057 | /* | |
1058 | * Allocate and setup SGL used with transport_generic_map_mem_to_cmd(). | |
1059 | * also call iscsit_allocate_iovecs() | |
1060 | */ | |
1061 | ret = iscsit_alloc_buffs(cmd); | |
1062 | if (ret < 0) | |
1063 | return iscsit_add_reject_from_cmd( | |
1064 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
cd931ee6 | 1065 | 1, 0, buf, cmd); |
e48354ce NB |
1066 | /* |
1067 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1068 | * the Immediate Bit is not set, and no Immediate | |
1069 | * Data is attached. | |
1070 | * | |
1071 | * A PDU/CmdSN carrying Immediate Data can only | |
1072 | * be processed after the DataCRC has passed. | |
1073 | * If the DataCRC fails, the CmdSN MUST NOT | |
1074 | * be acknowledged. (See below) | |
1075 | */ | |
1076 | if (!cmd->immediate_data) { | |
1077 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
7e32da55 NB |
1078 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1079 | return 0; | |
1080 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
e48354ce NB |
1081 | return iscsit_add_reject_from_cmd( |
1082 | ISCSI_REASON_PROTOCOL_ERROR, | |
1083 | 1, 0, buf, cmd); | |
1084 | } | |
1085 | ||
1086 | iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); | |
1087 | ||
1088 | /* | |
1089 | * If no Immediate Data is attached, it's OK to return now. | |
1090 | */ | |
1091 | if (!cmd->immediate_data) { | |
1092 | if (send_check_condition) | |
1093 | return 0; | |
1094 | ||
1095 | if (cmd->unsolicited_data) { | |
1096 | iscsit_set_dataout_sequence_values(cmd); | |
1097 | ||
1098 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1099 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1100 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1101 | } | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * Early CHECK_CONDITIONs never make it to the transport processing | |
1108 | * thread. They are processed in CmdSN order by | |
1109 | * iscsit_check_received_cmdsn() below. | |
1110 | */ | |
1111 | if (send_check_condition) { | |
1112 | immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; | |
1113 | dump_immediate_data = 1; | |
1114 | goto after_immediate_data; | |
1115 | } | |
1116 | /* | |
1117 | * Call directly into transport_generic_new_cmd() to perform | |
1118 | * the backend memory allocation. | |
1119 | */ | |
1120 | ret = transport_generic_new_cmd(&cmd->se_cmd); | |
03e98c9e | 1121 | if (ret < 0) { |
e48354ce NB |
1122 | immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; |
1123 | dump_immediate_data = 1; | |
1124 | goto after_immediate_data; | |
1125 | } | |
1126 | ||
1127 | immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length); | |
1128 | after_immediate_data: | |
1129 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1130 | /* | |
1131 | * A PDU/CmdSN carrying Immediate Data passed | |
1132 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1133 | * Immediate Bit is not set. | |
1134 | */ | |
1135 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1136 | /* | |
1137 | * Special case for Unsupported SAM WRITE Opcodes | |
1138 | * and ImmediateData=Yes. | |
1139 | */ | |
1140 | if (dump_immediate_data) { | |
1141 | if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) | |
1142 | return -1; | |
1143 | } else if (cmd->unsolicited_data) { | |
1144 | iscsit_set_dataout_sequence_values(cmd); | |
1145 | ||
1146 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1147 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1148 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1149 | } | |
1150 | ||
1151 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1152 | return iscsit_add_reject_from_cmd( | |
1153 | ISCSI_REASON_PROTOCOL_ERROR, | |
1154 | 1, 0, buf, cmd); | |
1155 | ||
1156 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { | |
1157 | /* | |
1158 | * Immediate Data failed DataCRC and ERL>=1, | |
1159 | * silently drop this PDU and let the initiator | |
1160 | * plug the CmdSN gap. | |
1161 | * | |
1162 | * FIXME: Send Unsolicited NOPIN with reserved | |
1163 | * TTT here to help the initiator figure out | |
1164 | * the missing CmdSN, although they should be | |
1165 | * intelligent enough to determine the missing | |
1166 | * CmdSN and issue a retry to plug the sequence. | |
1167 | */ | |
1168 | cmd->i_state = ISTATE_REMOVE; | |
1169 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
1170 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ | |
1171 | return -1; | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static u32 iscsit_do_crypto_hash_sg( | |
1177 | struct hash_desc *hash, | |
1178 | struct iscsi_cmd *cmd, | |
1179 | u32 data_offset, | |
1180 | u32 data_length, | |
1181 | u32 padding, | |
1182 | u8 *pad_bytes) | |
1183 | { | |
1184 | u32 data_crc; | |
1185 | u32 i; | |
1186 | struct scatterlist *sg; | |
1187 | unsigned int page_off; | |
1188 | ||
1189 | crypto_hash_init(hash); | |
1190 | ||
1191 | sg = cmd->first_data_sg; | |
1192 | page_off = cmd->first_data_sg_off; | |
1193 | ||
1194 | i = 0; | |
1195 | while (data_length) { | |
1196 | u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); | |
1197 | ||
1198 | crypto_hash_update(hash, &sg[i], cur_len); | |
1199 | ||
1200 | data_length -= cur_len; | |
1201 | page_off = 0; | |
1202 | i++; | |
1203 | } | |
1204 | ||
1205 | if (padding) { | |
1206 | struct scatterlist pad_sg; | |
1207 | ||
1208 | sg_init_one(&pad_sg, pad_bytes, padding); | |
1209 | crypto_hash_update(hash, &pad_sg, padding); | |
1210 | } | |
1211 | crypto_hash_final(hash, (u8 *) &data_crc); | |
1212 | ||
1213 | return data_crc; | |
1214 | } | |
1215 | ||
1216 | static void iscsit_do_crypto_hash_buf( | |
1217 | struct hash_desc *hash, | |
1218 | unsigned char *buf, | |
1219 | u32 payload_length, | |
1220 | u32 padding, | |
1221 | u8 *pad_bytes, | |
1222 | u8 *data_crc) | |
1223 | { | |
1224 | struct scatterlist sg; | |
1225 | ||
1226 | crypto_hash_init(hash); | |
1227 | ||
8359cf43 | 1228 | sg_init_one(&sg, buf, payload_length); |
e48354ce NB |
1229 | crypto_hash_update(hash, &sg, payload_length); |
1230 | ||
1231 | if (padding) { | |
1232 | sg_init_one(&sg, pad_bytes, padding); | |
1233 | crypto_hash_update(hash, &sg, padding); | |
1234 | } | |
1235 | crypto_hash_final(hash, data_crc); | |
1236 | } | |
1237 | ||
1238 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) | |
1239 | { | |
1240 | int iov_ret, ooo_cmdsn = 0, ret; | |
1241 | u8 data_crc_failed = 0; | |
1242 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0; | |
1243 | u32 rx_size = 0, payload_length; | |
1244 | struct iscsi_cmd *cmd = NULL; | |
1245 | struct se_cmd *se_cmd; | |
1246 | struct iscsi_data *hdr; | |
1247 | struct kvec *iov; | |
1248 | unsigned long flags; | |
1249 | ||
1250 | hdr = (struct iscsi_data *) buf; | |
1251 | payload_length = ntoh24(hdr->dlength); | |
1252 | hdr->itt = be32_to_cpu(hdr->itt); | |
1253 | hdr->ttt = be32_to_cpu(hdr->ttt); | |
1254 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
1255 | hdr->datasn = be32_to_cpu(hdr->datasn); | |
1256 | hdr->offset = be32_to_cpu(hdr->offset); | |
1257 | ||
1258 | if (!payload_length) { | |
1259 | pr_err("DataOUT payload is ZERO, protocol error.\n"); | |
1260 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1261 | buf, conn); | |
1262 | } | |
1263 | ||
1264 | /* iSCSI write */ | |
1265 | spin_lock_bh(&conn->sess->session_stats_lock); | |
1266 | conn->sess->rx_data_octets += payload_length; | |
1267 | if (conn->sess->se_sess->se_node_acl) { | |
1268 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
1269 | conn->sess->se_sess->se_node_acl->write_bytes += payload_length; | |
1270 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
1271 | } | |
1272 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
1273 | ||
1274 | if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { | |
1275 | pr_err("DataSegmentLength: %u is greater than" | |
1276 | " MaxRecvDataSegmentLength: %u\n", payload_length, | |
1277 | conn->conn_ops->MaxRecvDataSegmentLength); | |
1278 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1279 | buf, conn); | |
1280 | } | |
1281 | ||
1282 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1283 | payload_length); | |
1284 | if (!cmd) | |
1285 | return 0; | |
1286 | ||
1287 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1288 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
1289 | hdr->itt, hdr->ttt, hdr->datasn, hdr->offset, | |
1290 | payload_length, conn->cid); | |
1291 | ||
1292 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1293 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1294 | " last DataOUT received, dumping payload\n", | |
1295 | cmd->init_task_tag); | |
1296 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1297 | } | |
1298 | ||
1299 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1300 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1301 | " NON-WRITE command.\n", cmd->init_task_tag); | |
1302 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, | |
1303 | 1, 0, buf, cmd); | |
1304 | } | |
1305 | se_cmd = &cmd->se_cmd; | |
1306 | iscsit_mod_dataout_timer(cmd); | |
1307 | ||
1308 | if ((hdr->offset + payload_length) > cmd->data_length) { | |
1309 | pr_err("DataOut Offset: %u, Length %u greater than" | |
1310 | " iSCSI Command EDTL %u, protocol error.\n", | |
1311 | hdr->offset, payload_length, cmd->data_length); | |
1312 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, | |
1313 | 1, 0, buf, cmd); | |
1314 | } | |
1315 | ||
1316 | if (cmd->unsolicited_data) { | |
1317 | int dump_unsolicited_data = 0; | |
1318 | ||
1319 | if (conn->sess->sess_ops->InitialR2T) { | |
1320 | pr_err("Received unexpected unsolicited data" | |
1321 | " while InitialR2T=Yes, protocol error.\n"); | |
1322 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1323 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1324 | return -1; | |
1325 | } | |
1326 | /* | |
1327 | * Special case for dealing with Unsolicited DataOUT | |
1328 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1329 | * failures; | |
1330 | */ | |
1331 | ||
1332 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
1333 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); | |
1334 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); | |
1335 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); | |
1336 | ||
1337 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); | |
1338 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) || | |
03e98c9e | 1339 | (se_cmd->se_cmd_flags & SCF_SCSI_CDB_EXCEPTION)) |
e48354ce NB |
1340 | dump_unsolicited_data = 1; |
1341 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); | |
1342 | ||
1343 | if (dump_unsolicited_data) { | |
1344 | /* | |
1345 | * Check if a delayed TASK_ABORTED status needs to | |
1346 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
1347 | * received with the unsolicitied data out. | |
1348 | */ | |
1349 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1350 | iscsit_stop_dataout_timer(cmd); | |
1351 | ||
1352 | transport_check_aborted_status(se_cmd, | |
1353 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1354 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1355 | } | |
1356 | } else { | |
1357 | /* | |
1358 | * For the normal solicited data path: | |
1359 | * | |
1360 | * Check for a delayed TASK_ABORTED status and dump any | |
1361 | * incoming data out payload if one exists. Also, when the | |
1362 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1363 | * data out sequence, we decrement outstanding_r2ts. Once | |
1364 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1365 | * TASK_ABORTED status. | |
1366 | */ | |
1367 | if (atomic_read(&se_cmd->t_transport_aborted) != 0) { | |
1368 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1369 | if (--cmd->outstanding_r2ts < 1) { | |
1370 | iscsit_stop_dataout_timer(cmd); | |
1371 | transport_check_aborted_status( | |
1372 | se_cmd, 1); | |
1373 | } | |
1374 | ||
1375 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1376 | } | |
1377 | } | |
1378 | /* | |
1379 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1380 | * within-command recovery checks before receiving the payload. | |
1381 | */ | |
1382 | ret = iscsit_check_pre_dataout(cmd, buf); | |
1383 | if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
1384 | return 0; | |
1385 | else if (ret == DATAOUT_CANNOT_RECOVER) | |
1386 | return -1; | |
1387 | ||
1388 | rx_size += payload_length; | |
1389 | iov = &cmd->iov_data[0]; | |
1390 | ||
1391 | iov_ret = iscsit_map_iovec(cmd, iov, hdr->offset, payload_length); | |
1392 | if (iov_ret < 0) | |
1393 | return -1; | |
1394 | ||
1395 | iov_count += iov_ret; | |
1396 | ||
1397 | padding = ((-payload_length) & 3); | |
1398 | if (padding != 0) { | |
1399 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1400 | iov[iov_count++].iov_len = padding; | |
1401 | rx_size += padding; | |
1402 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1403 | } | |
1404 | ||
1405 | if (conn->conn_ops->DataDigest) { | |
1406 | iov[iov_count].iov_base = &checksum; | |
1407 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1408 | rx_size += ISCSI_CRC_LEN; | |
1409 | } | |
1410 | ||
1411 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1412 | ||
1413 | iscsit_unmap_iovec(cmd); | |
1414 | ||
1415 | if (rx_got != rx_size) | |
1416 | return -1; | |
1417 | ||
1418 | if (conn->conn_ops->DataDigest) { | |
1419 | u32 data_crc; | |
1420 | ||
1421 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
1422 | hdr->offset, payload_length, padding, | |
1423 | cmd->pad_bytes); | |
1424 | ||
1425 | if (checksum != data_crc) { | |
1426 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1427 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1428 | " does not match computed 0x%08x\n", | |
1429 | hdr->itt, hdr->offset, payload_length, | |
1430 | hdr->datasn, checksum, data_crc); | |
1431 | data_crc_failed = 1; | |
1432 | } else { | |
1433 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1434 | " %u bytes of Data Out\n", checksum, | |
1435 | payload_length); | |
1436 | } | |
1437 | } | |
1438 | /* | |
1439 | * Increment post receive data and CRC values or perform | |
1440 | * within-command recovery. | |
1441 | */ | |
1442 | ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed); | |
1443 | if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
1444 | return 0; | |
1445 | else if (ret == DATAOUT_SEND_R2T) { | |
1446 | iscsit_set_dataout_sequence_values(cmd); | |
1447 | iscsit_build_r2ts_for_cmd(cmd, conn, 0); | |
1448 | } else if (ret == DATAOUT_SEND_TO_TRANSPORT) { | |
1449 | /* | |
1450 | * Handle extra special case for out of order | |
1451 | * Unsolicited Data Out. | |
1452 | */ | |
1453 | spin_lock_bh(&cmd->istate_lock); | |
1454 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1455 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1456 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1457 | spin_unlock_bh(&cmd->istate_lock); | |
1458 | ||
1459 | iscsit_stop_dataout_timer(cmd); | |
1460 | return (!ooo_cmdsn) ? transport_generic_handle_data( | |
1461 | &cmd->se_cmd) : 0; | |
1462 | } else /* DATAOUT_CANNOT_RECOVER */ | |
1463 | return -1; | |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
1468 | static int iscsit_handle_nop_out( | |
1469 | struct iscsi_conn *conn, | |
1470 | unsigned char *buf) | |
1471 | { | |
1472 | unsigned char *ping_data = NULL; | |
1473 | int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size; | |
1474 | u32 checksum, data_crc, padding = 0, payload_length; | |
1475 | u64 lun; | |
1476 | struct iscsi_cmd *cmd = NULL; | |
1477 | struct kvec *iov = NULL; | |
1478 | struct iscsi_nopout *hdr; | |
1479 | ||
1480 | hdr = (struct iscsi_nopout *) buf; | |
1481 | payload_length = ntoh24(hdr->dlength); | |
1482 | lun = get_unaligned_le64(&hdr->lun); | |
1483 | hdr->itt = be32_to_cpu(hdr->itt); | |
1484 | hdr->ttt = be32_to_cpu(hdr->ttt); | |
1485 | hdr->cmdsn = be32_to_cpu(hdr->cmdsn); | |
1486 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
1487 | ||
1488 | if ((hdr->itt == 0xFFFFFFFF) && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1489 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" | |
1490 | " not set, protocol error.\n"); | |
1491 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1492 | buf, conn); | |
1493 | } | |
1494 | ||
1495 | if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { | |
1496 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" | |
1497 | " greater than MaxRecvDataSegmentLength: %u, protocol" | |
1498 | " error.\n", payload_length, | |
1499 | conn->conn_ops->MaxRecvDataSegmentLength); | |
1500 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1501 | buf, conn); | |
1502 | } | |
1503 | ||
1504 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x," | |
1505 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", | |
1506 | (hdr->itt == 0xFFFFFFFF) ? "Response" : "Request", | |
1507 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, | |
1508 | payload_length); | |
1509 | /* | |
1510 | * This is not a response to a Unsolicited NopIN, which means | |
1511 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1512 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1513 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1514 | * can contain ping data. | |
1515 | */ | |
1516 | if (hdr->ttt == 0xFFFFFFFF) { | |
1517 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
1518 | if (!cmd) | |
1519 | return iscsit_add_reject( | |
1520 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1521 | 1, buf, conn); | |
1522 | ||
1523 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; | |
1524 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1525 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1526 | 1 : 0); | |
1527 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1528 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
1529 | cmd->cmd_sn = hdr->cmdsn; | |
1530 | cmd->exp_stat_sn = hdr->exp_statsn; | |
1531 | cmd->data_direction = DMA_NONE; | |
1532 | } | |
1533 | ||
1534 | if (payload_length && (hdr->ttt == 0xFFFFFFFF)) { | |
1535 | rx_size = payload_length; | |
1536 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); | |
1537 | if (!ping_data) { | |
1538 | pr_err("Unable to allocate memory for" | |
1539 | " NOPOUT ping data.\n"); | |
1540 | ret = -1; | |
1541 | goto out; | |
1542 | } | |
1543 | ||
1544 | iov = &cmd->iov_misc[0]; | |
1545 | iov[niov].iov_base = ping_data; | |
1546 | iov[niov++].iov_len = payload_length; | |
1547 | ||
1548 | padding = ((-payload_length) & 3); | |
1549 | if (padding != 0) { | |
1550 | pr_debug("Receiving %u additional bytes" | |
1551 | " for padding.\n", padding); | |
1552 | iov[niov].iov_base = &cmd->pad_bytes; | |
1553 | iov[niov++].iov_len = padding; | |
1554 | rx_size += padding; | |
1555 | } | |
1556 | if (conn->conn_ops->DataDigest) { | |
1557 | iov[niov].iov_base = &checksum; | |
1558 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1559 | rx_size += ISCSI_CRC_LEN; | |
1560 | } | |
1561 | ||
1562 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1563 | if (rx_got != rx_size) { | |
1564 | ret = -1; | |
1565 | goto out; | |
1566 | } | |
1567 | ||
1568 | if (conn->conn_ops->DataDigest) { | |
1569 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1570 | ping_data, payload_length, | |
1571 | padding, cmd->pad_bytes, | |
1572 | (u8 *)&data_crc); | |
1573 | ||
1574 | if (checksum != data_crc) { | |
1575 | pr_err("Ping data CRC32C DataDigest" | |
1576 | " 0x%08x does not match computed 0x%08x\n", | |
1577 | checksum, data_crc); | |
1578 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1579 | pr_err("Unable to recover from" | |
1580 | " NOPOUT Ping DataCRC failure while in" | |
1581 | " ERL=0.\n"); | |
1582 | ret = -1; | |
1583 | goto out; | |
1584 | } else { | |
1585 | /* | |
1586 | * Silently drop this PDU and let the | |
1587 | * initiator plug the CmdSN gap. | |
1588 | */ | |
1589 | pr_debug("Dropping NOPOUT" | |
1590 | " Command CmdSN: 0x%08x due to" | |
1591 | " DataCRC error.\n", hdr->cmdsn); | |
1592 | ret = 0; | |
1593 | goto out; | |
1594 | } | |
1595 | } else { | |
1596 | pr_debug("Got CRC32C DataDigest" | |
1597 | " 0x%08x for %u bytes of ping data.\n", | |
1598 | checksum, payload_length); | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | ping_data[payload_length] = '\0'; | |
1603 | /* | |
1604 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1605 | */ | |
8359cf43 | 1606 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1607 | cmd->buf_ptr_size = payload_length; |
1608 | ||
1609 | pr_debug("Got %u bytes of NOPOUT ping" | |
1610 | " data.\n", payload_length); | |
1611 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1612 | } | |
1613 | ||
1614 | if (hdr->itt != 0xFFFFFFFF) { | |
1615 | if (!cmd) { | |
1616 | pr_err("Checking CmdSN for NOPOUT," | |
1617 | " but cmd is NULL!\n"); | |
1618 | return -1; | |
1619 | } | |
1620 | /* | |
1621 | * Initiator is expecting a NopIN ping reply, | |
1622 | */ | |
1623 | spin_lock_bh(&conn->cmd_lock); | |
1624 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
1625 | spin_unlock_bh(&conn->cmd_lock); | |
1626 | ||
1627 | iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); | |
1628 | ||
1629 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1630 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1631 | cmd->i_state); | |
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1636 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
1637 | ret = 0; | |
1638 | goto ping_out; | |
1639 | } | |
1640 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1641 | return iscsit_add_reject_from_cmd( | |
1642 | ISCSI_REASON_PROTOCOL_ERROR, | |
1643 | 1, 0, buf, cmd); | |
1644 | ||
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | if (hdr->ttt != 0xFFFFFFFF) { | |
1649 | /* | |
1650 | * This was a response to a unsolicited NOPIN ping. | |
1651 | */ | |
1652 | cmd = iscsit_find_cmd_from_ttt(conn, hdr->ttt); | |
1653 | if (!cmd) | |
1654 | return -1; | |
1655 | ||
1656 | iscsit_stop_nopin_response_timer(conn); | |
1657 | ||
1658 | cmd->i_state = ISTATE_REMOVE; | |
1659 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
1660 | iscsit_start_nopin_timer(conn); | |
1661 | } else { | |
1662 | /* | |
1663 | * Initiator is not expecting a NOPIN is response. | |
1664 | * Just ignore for now. | |
1665 | * | |
1666 | * iSCSI v19-91 10.18 | |
1667 | * "A NOP-OUT may also be used to confirm a changed | |
1668 | * ExpStatSN if another PDU will not be available | |
1669 | * for a long time." | |
1670 | */ | |
1671 | ret = 0; | |
1672 | goto out; | |
1673 | } | |
1674 | ||
1675 | return 0; | |
1676 | out: | |
1677 | if (cmd) | |
1678 | iscsit_release_cmd(cmd); | |
1679 | ping_out: | |
1680 | kfree(ping_data); | |
1681 | return ret; | |
1682 | } | |
1683 | ||
1684 | static int iscsit_handle_task_mgt_cmd( | |
1685 | struct iscsi_conn *conn, | |
1686 | unsigned char *buf) | |
1687 | { | |
1688 | struct iscsi_cmd *cmd; | |
1689 | struct se_tmr_req *se_tmr; | |
1690 | struct iscsi_tmr_req *tmr_req; | |
1691 | struct iscsi_tm *hdr; | |
1692 | u32 payload_length; | |
1693 | int out_of_order_cmdsn = 0; | |
1694 | int ret; | |
1695 | u8 function; | |
1696 | ||
1697 | hdr = (struct iscsi_tm *) buf; | |
1698 | payload_length = ntoh24(hdr->dlength); | |
1699 | hdr->itt = be32_to_cpu(hdr->itt); | |
1700 | hdr->rtt = be32_to_cpu(hdr->rtt); | |
1701 | hdr->cmdsn = be32_to_cpu(hdr->cmdsn); | |
1702 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
1703 | hdr->refcmdsn = be32_to_cpu(hdr->refcmdsn); | |
1704 | hdr->exp_datasn = be32_to_cpu(hdr->exp_datasn); | |
1705 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
1706 | function = hdr->flags; | |
1707 | ||
1708 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1709 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1710 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1711 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1712 | ||
1713 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1714 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1715 | (hdr->rtt != ISCSI_RESERVED_TAG))) { | |
1716 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); | |
1717 | hdr->rtt = ISCSI_RESERVED_TAG; | |
1718 | } | |
1719 | ||
1720 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1721 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1722 | pr_err("Task Management Request TASK_REASSIGN not" | |
1723 | " issued as immediate command, bad iSCSI Initiator" | |
1724 | "implementation\n"); | |
1725 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1726 | buf, conn); | |
1727 | } | |
1728 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1729 | (hdr->refcmdsn != ISCSI_RESERVED_TAG)) | |
1730 | hdr->refcmdsn = ISCSI_RESERVED_TAG; | |
1731 | ||
1732 | cmd = iscsit_allocate_se_cmd_for_tmr(conn, function); | |
1733 | if (!cmd) | |
1734 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1735 | 1, buf, conn); | |
1736 | ||
1737 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
1738 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
1739 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1740 | cmd->init_task_tag = hdr->itt; | |
1741 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
1742 | cmd->cmd_sn = hdr->cmdsn; | |
1743 | cmd->exp_stat_sn = hdr->exp_statsn; | |
1744 | se_tmr = cmd->se_cmd.se_tmr_req; | |
1745 | tmr_req = cmd->tmr_req; | |
1746 | /* | |
1747 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
1748 | */ | |
1749 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1750 | ret = iscsit_get_lun_for_tmr(cmd, | |
1751 | get_unaligned_le64(&hdr->lun)); | |
1752 | if (ret < 0) { | |
1753 | cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1754 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; | |
1755 | goto attach; | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | switch (function) { | |
1760 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1761 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
1762 | if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE) { | |
1763 | cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1764 | goto attach; | |
1765 | } | |
1766 | break; | |
1767 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1768 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1769 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1770 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1771 | break; | |
1772 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1773 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
1774 | cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1775 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; | |
1776 | goto attach; | |
1777 | } | |
1778 | break; | |
1779 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1780 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
1781 | cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1782 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; | |
1783 | goto attach; | |
1784 | } | |
1785 | break; | |
1786 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
1787 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
1788 | /* | |
1789 | * Perform sanity checks on the ExpDataSN only if the | |
1790 | * TASK_REASSIGN was successful. | |
1791 | */ | |
1792 | if (se_tmr->response != ISCSI_TMF_RSP_COMPLETE) | |
1793 | break; | |
1794 | ||
1795 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
1796 | return iscsit_add_reject_from_cmd( | |
1797 | ISCSI_REASON_BOOKMARK_INVALID, 1, 1, | |
1798 | buf, cmd); | |
1799 | break; | |
1800 | default: | |
1801 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
1802 | " error.\n", function); | |
1803 | cmd->se_cmd.se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION; | |
1804 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; | |
1805 | goto attach; | |
1806 | } | |
1807 | ||
1808 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1809 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
1810 | se_tmr->call_transport = 1; | |
1811 | attach: | |
1812 | spin_lock_bh(&conn->cmd_lock); | |
1813 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
1814 | spin_unlock_bh(&conn->cmd_lock); | |
1815 | ||
1816 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1817 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1818 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) | |
1819 | out_of_order_cmdsn = 1; | |
5a4c8666 | 1820 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 1821 | return 0; |
5a4c8666 | 1822 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
e48354ce NB |
1823 | return iscsit_add_reject_from_cmd( |
1824 | ISCSI_REASON_PROTOCOL_ERROR, | |
1825 | 1, 0, buf, cmd); | |
e48354ce NB |
1826 | } |
1827 | iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); | |
1828 | ||
5a4c8666 | 1829 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
1830 | return 0; |
1831 | /* | |
1832 | * Found the referenced task, send to transport for processing. | |
1833 | */ | |
1834 | if (se_tmr->call_transport) | |
1835 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
1836 | ||
1837 | /* | |
1838 | * Could not find the referenced LUN, task, or Task Management | |
1839 | * command not authorized or supported. Change state and | |
1840 | * let the tx_thread send the response. | |
1841 | * | |
1842 | * For connection recovery, this is also the default action for | |
1843 | * TMR TASK_REASSIGN. | |
1844 | */ | |
1845 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
1850 | static int iscsit_handle_text_cmd( | |
1851 | struct iscsi_conn *conn, | |
1852 | unsigned char *buf) | |
1853 | { | |
1854 | char *text_ptr, *text_in; | |
1855 | int cmdsn_ret, niov = 0, rx_got, rx_size; | |
1856 | u32 checksum = 0, data_crc = 0, payload_length; | |
76f1928e | 1857 | u32 padding = 0, pad_bytes = 0, text_length = 0; |
e48354ce NB |
1858 | struct iscsi_cmd *cmd; |
1859 | struct kvec iov[3]; | |
1860 | struct iscsi_text *hdr; | |
1861 | ||
1862 | hdr = (struct iscsi_text *) buf; | |
1863 | payload_length = ntoh24(hdr->dlength); | |
1864 | hdr->itt = be32_to_cpu(hdr->itt); | |
1865 | hdr->ttt = be32_to_cpu(hdr->ttt); | |
1866 | hdr->cmdsn = be32_to_cpu(hdr->cmdsn); | |
1867 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
1868 | ||
1869 | if (payload_length > conn->conn_ops->MaxRecvDataSegmentLength) { | |
1870 | pr_err("Unable to accept text parameter length: %u" | |
1871 | "greater than MaxRecvDataSegmentLength %u.\n", | |
1872 | payload_length, conn->conn_ops->MaxRecvDataSegmentLength); | |
1873 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1874 | buf, conn); | |
1875 | } | |
1876 | ||
1877 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," | |
1878 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
1879 | hdr->exp_statsn, payload_length); | |
1880 | ||
1881 | rx_size = text_length = payload_length; | |
1882 | if (text_length) { | |
1883 | text_in = kzalloc(text_length, GFP_KERNEL); | |
1884 | if (!text_in) { | |
1885 | pr_err("Unable to allocate memory for" | |
1886 | " incoming text parameters\n"); | |
1887 | return -1; | |
1888 | } | |
1889 | ||
1890 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
1891 | iov[niov].iov_base = text_in; | |
1892 | iov[niov++].iov_len = text_length; | |
1893 | ||
1894 | padding = ((-payload_length) & 3); | |
1895 | if (padding != 0) { | |
76f1928e | 1896 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
1897 | iov[niov++].iov_len = padding; |
1898 | rx_size += padding; | |
1899 | pr_debug("Receiving %u additional bytes" | |
1900 | " for padding.\n", padding); | |
1901 | } | |
1902 | if (conn->conn_ops->DataDigest) { | |
1903 | iov[niov].iov_base = &checksum; | |
1904 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1905 | rx_size += ISCSI_CRC_LEN; | |
1906 | } | |
1907 | ||
1908 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
1909 | if (rx_got != rx_size) { | |
1910 | kfree(text_in); | |
1911 | return -1; | |
1912 | } | |
1913 | ||
1914 | if (conn->conn_ops->DataDigest) { | |
1915 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1916 | text_in, text_length, | |
76f1928e | 1917 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
1918 | (u8 *)&data_crc); |
1919 | ||
1920 | if (checksum != data_crc) { | |
1921 | pr_err("Text data CRC32C DataDigest" | |
1922 | " 0x%08x does not match computed" | |
1923 | " 0x%08x\n", checksum, data_crc); | |
1924 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1925 | pr_err("Unable to recover from" | |
1926 | " Text Data digest failure while in" | |
1927 | " ERL=0.\n"); | |
1928 | kfree(text_in); | |
1929 | return -1; | |
1930 | } else { | |
1931 | /* | |
1932 | * Silently drop this PDU and let the | |
1933 | * initiator plug the CmdSN gap. | |
1934 | */ | |
1935 | pr_debug("Dropping Text" | |
1936 | " Command CmdSN: 0x%08x due to" | |
1937 | " DataCRC error.\n", hdr->cmdsn); | |
1938 | kfree(text_in); | |
1939 | return 0; | |
1940 | } | |
1941 | } else { | |
1942 | pr_debug("Got CRC32C DataDigest" | |
1943 | " 0x%08x for %u bytes of text data.\n", | |
1944 | checksum, text_length); | |
1945 | } | |
1946 | } | |
1947 | text_in[text_length - 1] = '\0'; | |
1948 | pr_debug("Successfully read %d bytes of text" | |
1949 | " data.\n", text_length); | |
1950 | ||
1951 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
1952 | pr_err("Received Text Data that is not" | |
1953 | " SendTargets, cannot continue.\n"); | |
1954 | kfree(text_in); | |
1955 | return -1; | |
1956 | } | |
1957 | text_ptr = strchr(text_in, '='); | |
1958 | if (!text_ptr) { | |
1959 | pr_err("No \"=\" separator found in Text Data," | |
1960 | " cannot continue.\n"); | |
1961 | kfree(text_in); | |
1962 | return -1; | |
1963 | } | |
1964 | if (strncmp("=All", text_ptr, 4) != 0) { | |
1965 | pr_err("Unable to locate All value for" | |
1966 | " SendTargets key, cannot continue.\n"); | |
1967 | kfree(text_in); | |
1968 | return -1; | |
1969 | } | |
1970 | /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */ | |
1971 | kfree(text_in); | |
1972 | } | |
1973 | ||
1974 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
1975 | if (!cmd) | |
1976 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1977 | 1, buf, conn); | |
1978 | ||
1979 | cmd->iscsi_opcode = ISCSI_OP_TEXT; | |
1980 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
1981 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1982 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1983 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
1984 | cmd->cmd_sn = hdr->cmdsn; | |
1985 | cmd->exp_stat_sn = hdr->exp_statsn; | |
1986 | cmd->data_direction = DMA_NONE; | |
1987 | ||
1988 | spin_lock_bh(&conn->cmd_lock); | |
1989 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
1990 | spin_unlock_bh(&conn->cmd_lock); | |
1991 | ||
1992 | iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); | |
1993 | ||
1994 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1995 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1996 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1997 | return iscsit_add_reject_from_cmd( | |
1998 | ISCSI_REASON_PROTOCOL_ERROR, | |
1999 | 1, 0, buf, cmd); | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | return iscsit_execute_cmd(cmd, 0); | |
2005 | } | |
2006 | ||
2007 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2008 | { | |
2009 | struct iscsi_conn *conn_p; | |
2010 | struct iscsi_session *sess = conn->sess; | |
2011 | ||
2012 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2013 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2014 | ||
2015 | atomic_set(&sess->session_logout, 1); | |
2016 | atomic_set(&conn->conn_logout_remove, 1); | |
2017 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2018 | ||
2019 | iscsit_inc_conn_usage_count(conn); | |
2020 | iscsit_inc_session_usage_count(sess); | |
2021 | ||
2022 | spin_lock_bh(&sess->conn_lock); | |
2023 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2024 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2025 | continue; | |
2026 | ||
2027 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2028 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2029 | } | |
2030 | spin_unlock_bh(&sess->conn_lock); | |
2031 | ||
2032 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2033 | ||
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2038 | { | |
2039 | struct iscsi_conn *l_conn; | |
2040 | struct iscsi_session *sess = conn->sess; | |
2041 | ||
2042 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2043 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2044 | ||
2045 | /* | |
2046 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2047 | * can arrive on a connection with a differing CID. | |
2048 | */ | |
2049 | if (conn->cid == cmd->logout_cid) { | |
2050 | spin_lock_bh(&conn->state_lock); | |
2051 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2052 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2053 | ||
2054 | atomic_set(&conn->conn_logout_remove, 1); | |
2055 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2056 | iscsit_inc_conn_usage_count(conn); | |
2057 | ||
2058 | spin_unlock_bh(&conn->state_lock); | |
2059 | } else { | |
2060 | /* | |
2061 | * Handle all different cid CLOSECONNECTION requests in | |
2062 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2063 | * time for any non immediate command's CmdSN to be | |
2064 | * acknowledged on the connection in question. | |
2065 | * | |
2066 | * Here we simply make sure the CID is still around. | |
2067 | */ | |
2068 | l_conn = iscsit_get_conn_from_cid(sess, | |
2069 | cmd->logout_cid); | |
2070 | if (!l_conn) { | |
2071 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2072 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2073 | cmd->i_state); | |
2074 | return 0; | |
2075 | } | |
2076 | ||
2077 | iscsit_dec_conn_usage_count(l_conn); | |
2078 | } | |
2079 | ||
2080 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2081 | ||
2082 | return 0; | |
2083 | } | |
2084 | ||
2085 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2086 | { | |
2087 | struct iscsi_session *sess = conn->sess; | |
2088 | ||
2089 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2090 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2091 | ||
2092 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2093 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2094 | " while ERL!=2.\n"); | |
2095 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2096 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2097 | return 0; | |
2098 | } | |
2099 | ||
2100 | if (conn->cid == cmd->logout_cid) { | |
2101 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2102 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2103 | cmd->logout_cid, conn->cid); | |
2104 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2105 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2110 | ||
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | static int iscsit_handle_logout_cmd( | |
2115 | struct iscsi_conn *conn, | |
2116 | unsigned char *buf) | |
2117 | { | |
2118 | int cmdsn_ret, logout_remove = 0; | |
2119 | u8 reason_code = 0; | |
2120 | struct iscsi_cmd *cmd; | |
2121 | struct iscsi_logout *hdr; | |
2122 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2123 | ||
2124 | hdr = (struct iscsi_logout *) buf; | |
2125 | reason_code = (hdr->flags & 0x7f); | |
2126 | hdr->itt = be32_to_cpu(hdr->itt); | |
2127 | hdr->cid = be16_to_cpu(hdr->cid); | |
2128 | hdr->cmdsn = be32_to_cpu(hdr->cmdsn); | |
2129 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
2130 | ||
2131 | if (tiqn) { | |
2132 | spin_lock(&tiqn->logout_stats.lock); | |
2133 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2134 | tiqn->logout_stats.normal_logouts++; | |
2135 | else | |
2136 | tiqn->logout_stats.abnormal_logouts++; | |
2137 | spin_unlock(&tiqn->logout_stats.lock); | |
2138 | } | |
2139 | ||
2140 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2141 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2142 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2143 | hdr->cid, conn->cid); | |
2144 | ||
2145 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2146 | pr_err("Received logout request on connection that" | |
2147 | " is not in logged in state, ignoring request.\n"); | |
2148 | return 0; | |
2149 | } | |
2150 | ||
2151 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
2152 | if (!cmd) | |
2153 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1, | |
2154 | buf, conn); | |
2155 | ||
2156 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; | |
2157 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2158 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2159 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2160 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
2161 | cmd->cmd_sn = hdr->cmdsn; | |
2162 | cmd->exp_stat_sn = hdr->exp_statsn; | |
2163 | cmd->logout_cid = hdr->cid; | |
2164 | cmd->logout_reason = reason_code; | |
2165 | cmd->data_direction = DMA_NONE; | |
2166 | ||
2167 | /* | |
2168 | * We need to sleep in these cases (by returning 1) until the Logout | |
2169 | * Response gets sent in the tx thread. | |
2170 | */ | |
2171 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2172 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
2173 | (hdr->cid == conn->cid))) | |
2174 | logout_remove = 1; | |
2175 | ||
2176 | spin_lock_bh(&conn->cmd_lock); | |
2177 | list_add_tail(&cmd->i_list, &conn->conn_cmd_list); | |
2178 | spin_unlock_bh(&conn->cmd_lock); | |
2179 | ||
2180 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
2181 | iscsit_ack_from_expstatsn(conn, hdr->exp_statsn); | |
2182 | ||
2183 | /* | |
2184 | * Immediate commands are executed, well, immediately. | |
2185 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2186 | */ | |
2187 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
2188 | int ret = iscsit_execute_cmd(cmd, 0); | |
2189 | ||
2190 | if (ret < 0) | |
2191 | return ret; | |
2192 | } else { | |
2193 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
2194 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
2195 | logout_remove = 0; | |
2196 | } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { | |
2197 | return iscsit_add_reject_from_cmd( | |
2198 | ISCSI_REASON_PROTOCOL_ERROR, | |
2199 | 1, 0, buf, cmd); | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | return logout_remove; | |
2204 | } | |
2205 | ||
2206 | static int iscsit_handle_snack( | |
2207 | struct iscsi_conn *conn, | |
2208 | unsigned char *buf) | |
2209 | { | |
2210 | u32 unpacked_lun; | |
2211 | u64 lun; | |
2212 | struct iscsi_snack *hdr; | |
2213 | ||
2214 | hdr = (struct iscsi_snack *) buf; | |
2215 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
2216 | lun = get_unaligned_le64(&hdr->lun); | |
2217 | unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun); | |
2218 | hdr->itt = be32_to_cpu(hdr->itt); | |
2219 | hdr->ttt = be32_to_cpu(hdr->ttt); | |
2220 | hdr->exp_statsn = be32_to_cpu(hdr->exp_statsn); | |
2221 | hdr->begrun = be32_to_cpu(hdr->begrun); | |
2222 | hdr->runlength = be32_to_cpu(hdr->runlength); | |
2223 | ||
2224 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2225 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2226 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2227 | hdr->begrun, hdr->runlength, conn->cid); | |
2228 | ||
2229 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2230 | pr_err("Initiator sent SNACK request while in" | |
2231 | " ErrorRecoveryLevel=0.\n"); | |
2232 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2233 | buf, conn); | |
2234 | } | |
2235 | /* | |
2236 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2237 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2238 | */ | |
2239 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2240 | case 0: | |
2241 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
2242 | hdr->itt, hdr->ttt, hdr->begrun, hdr->runlength); | |
e48354ce NB |
2243 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
2244 | return iscsit_handle_status_snack(conn, hdr->itt, hdr->ttt, | |
2245 | hdr->begrun, hdr->runlength); | |
2246 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: | |
2247 | return iscsit_handle_data_ack(conn, hdr->ttt, hdr->begrun, | |
2248 | hdr->runlength); | |
2249 | case ISCSI_FLAG_SNACK_TYPE_RDATA: | |
2250 | /* FIXME: Support R-Data SNACK */ | |
2251 | pr_err("R-Data SNACK Not Supported.\n"); | |
2252 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2253 | buf, conn); | |
2254 | default: | |
2255 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2256 | " error.\n", hdr->flags & 0x0f); | |
2257 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2258 | buf, conn); | |
2259 | } | |
2260 | ||
2261 | return 0; | |
2262 | } | |
2263 | ||
2264 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2265 | { | |
2266 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2267 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2268 | wait_for_completion_interruptible_timeout( | |
2269 | &conn->rx_half_close_comp, | |
2270 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2271 | } | |
2272 | } | |
2273 | ||
2274 | static int iscsit_handle_immediate_data( | |
2275 | struct iscsi_cmd *cmd, | |
2276 | unsigned char *buf, | |
2277 | u32 length) | |
2278 | { | |
2279 | int iov_ret, rx_got = 0, rx_size = 0; | |
2280 | u32 checksum, iov_count = 0, padding = 0; | |
2281 | struct iscsi_conn *conn = cmd->conn; | |
2282 | struct kvec *iov; | |
2283 | ||
2284 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2285 | if (iov_ret < 0) | |
2286 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2287 | ||
2288 | rx_size = length; | |
2289 | iov_count = iov_ret; | |
2290 | iov = &cmd->iov_data[0]; | |
2291 | ||
2292 | padding = ((-length) & 3); | |
2293 | if (padding != 0) { | |
2294 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2295 | iov[iov_count++].iov_len = padding; | |
2296 | rx_size += padding; | |
2297 | } | |
2298 | ||
2299 | if (conn->conn_ops->DataDigest) { | |
2300 | iov[iov_count].iov_base = &checksum; | |
2301 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2302 | rx_size += ISCSI_CRC_LEN; | |
2303 | } | |
2304 | ||
2305 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2306 | ||
2307 | iscsit_unmap_iovec(cmd); | |
2308 | ||
2309 | if (rx_got != rx_size) { | |
2310 | iscsit_rx_thread_wait_for_tcp(conn); | |
2311 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2312 | } | |
2313 | ||
2314 | if (conn->conn_ops->DataDigest) { | |
2315 | u32 data_crc; | |
2316 | ||
2317 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
2318 | cmd->write_data_done, length, padding, | |
2319 | cmd->pad_bytes); | |
2320 | ||
2321 | if (checksum != data_crc) { | |
2322 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2323 | " does not match computed 0x%08x\n", checksum, | |
2324 | data_crc); | |
2325 | ||
2326 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2327 | pr_err("Unable to recover from" | |
2328 | " Immediate Data digest failure while" | |
2329 | " in ERL=0.\n"); | |
2330 | iscsit_add_reject_from_cmd( | |
2331 | ISCSI_REASON_DATA_DIGEST_ERROR, | |
2332 | 1, 0, buf, cmd); | |
2333 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2334 | } else { | |
2335 | iscsit_add_reject_from_cmd( | |
2336 | ISCSI_REASON_DATA_DIGEST_ERROR, | |
2337 | 0, 0, buf, cmd); | |
2338 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; | |
2339 | } | |
2340 | } else { | |
2341 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2342 | " %u bytes of Immediate Data\n", checksum, | |
2343 | length); | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | cmd->write_data_done += length; | |
2348 | ||
2349 | if (cmd->write_data_done == cmd->data_length) { | |
2350 | spin_lock_bh(&cmd->istate_lock); | |
2351 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2352 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2353 | spin_unlock_bh(&cmd->istate_lock); | |
2354 | } | |
2355 | ||
2356 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2357 | } | |
2358 | ||
2359 | /* | |
2360 | * Called with sess->conn_lock held. | |
2361 | */ | |
2362 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2363 | with active network interface */ | |
2364 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2365 | { | |
2366 | struct iscsi_cmd *cmd; | |
2367 | struct iscsi_conn *conn_p; | |
2368 | ||
2369 | /* | |
2370 | * Only send a Asynchronous Message on connections whos network | |
2371 | * interface is still functional. | |
2372 | */ | |
2373 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2374 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2375 | iscsit_inc_conn_usage_count(conn_p); | |
2376 | break; | |
2377 | } | |
2378 | } | |
2379 | ||
2380 | if (!conn_p) | |
2381 | return; | |
2382 | ||
2383 | cmd = iscsit_allocate_cmd(conn_p, GFP_KERNEL); | |
2384 | if (!cmd) { | |
2385 | iscsit_dec_conn_usage_count(conn_p); | |
2386 | return; | |
2387 | } | |
2388 | ||
2389 | cmd->logout_cid = conn->cid; | |
2390 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2391 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2392 | ||
2393 | spin_lock_bh(&conn_p->cmd_lock); | |
2394 | list_add_tail(&cmd->i_list, &conn_p->conn_cmd_list); | |
2395 | spin_unlock_bh(&conn_p->cmd_lock); | |
2396 | ||
2397 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2398 | iscsit_dec_conn_usage_count(conn_p); | |
2399 | } | |
2400 | ||
2401 | static int iscsit_send_conn_drop_async_message( | |
2402 | struct iscsi_cmd *cmd, | |
2403 | struct iscsi_conn *conn) | |
2404 | { | |
2405 | struct iscsi_async *hdr; | |
2406 | ||
2407 | cmd->tx_size = ISCSI_HDR_LEN; | |
2408 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2409 | ||
2410 | hdr = (struct iscsi_async *) cmd->pdu; | |
2411 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2412 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
2413 | cmd->init_task_tag = 0xFFFFFFFF; | |
2414 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
2415 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2416 | cmd->stat_sn = conn->stat_sn++; | |
2417 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2418 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2419 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2420 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; | |
2421 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2422 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2423 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2424 | ||
2425 | if (conn->conn_ops->HeaderDigest) { | |
2426 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2427 | ||
2428 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2429 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2430 | 0, NULL, (u8 *)header_digest); | |
2431 | ||
2432 | cmd->tx_size += ISCSI_CRC_LEN; | |
2433 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2434 | " Async Message 0x%08x\n", *header_digest); | |
2435 | } | |
2436 | ||
2437 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2438 | cmd->iov_misc[0].iov_len = cmd->tx_size; | |
2439 | cmd->iov_misc_count = 1; | |
2440 | ||
2441 | pr_debug("Sending Connection Dropped Async Message StatSN:" | |
2442 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2443 | cmd->logout_cid, conn->cid); | |
2444 | return 0; | |
2445 | } | |
2446 | ||
2447 | static int iscsit_send_data_in( | |
2448 | struct iscsi_cmd *cmd, | |
2449 | struct iscsi_conn *conn, | |
2450 | int *eodr) | |
2451 | { | |
2452 | int iov_ret = 0, set_statsn = 0; | |
2453 | u32 iov_count = 0, tx_size = 0; | |
2454 | struct iscsi_datain datain; | |
2455 | struct iscsi_datain_req *dr; | |
2456 | struct iscsi_data_rsp *hdr; | |
2457 | struct kvec *iov; | |
2458 | ||
2459 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2460 | dr = iscsit_get_datain_values(cmd, &datain); | |
2461 | if (!dr) { | |
2462 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2463 | cmd->init_task_tag); | |
2464 | return -1; | |
2465 | } | |
2466 | ||
2467 | /* | |
2468 | * Be paranoid and double check the logic for now. | |
2469 | */ | |
2470 | if ((datain.offset + datain.length) > cmd->data_length) { | |
2471 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" | |
2472 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2473 | cmd->init_task_tag, datain.offset, datain.length, | |
2474 | cmd->data_length); | |
2475 | return -1; | |
2476 | } | |
2477 | ||
2478 | spin_lock_bh(&conn->sess->session_stats_lock); | |
2479 | conn->sess->tx_data_octets += datain.length; | |
2480 | if (conn->sess->se_sess->se_node_acl) { | |
2481 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
2482 | conn->sess->se_sess->se_node_acl->read_bytes += datain.length; | |
2483 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
2484 | } | |
2485 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
2486 | /* | |
2487 | * Special case for successfully execution w/ both DATAIN | |
2488 | * and Sense Data. | |
2489 | */ | |
2490 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2491 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2492 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2493 | else { | |
2494 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2495 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2496 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2497 | cmd->stat_sn = conn->stat_sn++; | |
2498 | set_statsn = 1; | |
2499 | } else if (dr->dr_complete == | |
2500 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) | |
2501 | set_statsn = 1; | |
2502 | } | |
2503 | ||
2504 | hdr = (struct iscsi_data_rsp *) cmd->pdu; | |
2505 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2506 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; | |
2507 | hdr->flags = datain.flags; | |
2508 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2509 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2510 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
7e46cf02 | 2511 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
2512 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
2513 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
7e46cf02 | 2514 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
2515 | } |
2516 | } | |
2517 | hton24(hdr->dlength, datain.length); | |
2518 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2519 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2520 | (struct scsi_lun *)&hdr->lun); | |
2521 | else | |
2522 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2523 | ||
2524 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
2525 | hdr->ttt = (hdr->flags & ISCSI_FLAG_DATA_ACK) ? | |
2526 | cpu_to_be32(cmd->targ_xfer_tag) : | |
2527 | 0xFFFFFFFF; | |
2528 | hdr->statsn = (set_statsn) ? cpu_to_be32(cmd->stat_sn) : | |
2529 | 0xFFFFFFFF; | |
2530 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2531 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2532 | hdr->datasn = cpu_to_be32(datain.data_sn); | |
2533 | hdr->offset = cpu_to_be32(datain.offset); | |
2534 | ||
2535 | iov = &cmd->iov_data[0]; | |
2536 | iov[iov_count].iov_base = cmd->pdu; | |
2537 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
2538 | tx_size += ISCSI_HDR_LEN; | |
2539 | ||
2540 | if (conn->conn_ops->HeaderDigest) { | |
2541 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2542 | ||
2543 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2544 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2545 | 0, NULL, (u8 *)header_digest); | |
2546 | ||
2547 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2548 | tx_size += ISCSI_CRC_LEN; | |
2549 | ||
2550 | pr_debug("Attaching CRC32 HeaderDigest" | |
2551 | " for DataIN PDU 0x%08x\n", *header_digest); | |
2552 | } | |
2553 | ||
2554 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], datain.offset, datain.length); | |
2555 | if (iov_ret < 0) | |
2556 | return -1; | |
2557 | ||
2558 | iov_count += iov_ret; | |
2559 | tx_size += datain.length; | |
2560 | ||
2561 | cmd->padding = ((-datain.length) & 3); | |
2562 | if (cmd->padding) { | |
2563 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2564 | iov[iov_count++].iov_len = cmd->padding; | |
2565 | tx_size += cmd->padding; | |
2566 | ||
2567 | pr_debug("Attaching %u padding bytes\n", | |
2568 | cmd->padding); | |
2569 | } | |
2570 | if (conn->conn_ops->DataDigest) { | |
2571 | cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, | |
2572 | datain.offset, datain.length, cmd->padding, cmd->pad_bytes); | |
2573 | ||
2574 | iov[iov_count].iov_base = &cmd->data_crc; | |
2575 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2576 | tx_size += ISCSI_CRC_LEN; | |
2577 | ||
2578 | pr_debug("Attached CRC32C DataDigest %d bytes, crc" | |
2579 | " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); | |
2580 | } | |
2581 | ||
2582 | cmd->iov_data_count = iov_count; | |
2583 | cmd->tx_size = tx_size; | |
2584 | ||
2585 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2586 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2587 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2588 | ntohl(hdr->offset), datain.length, conn->cid); | |
2589 | ||
2590 | if (dr->dr_complete) { | |
2591 | *eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? | |
2592 | 2 : 1; | |
2593 | iscsit_free_datain_req(cmd, dr); | |
2594 | } | |
2595 | ||
2596 | return 0; | |
2597 | } | |
2598 | ||
2599 | static int iscsit_send_logout_response( | |
2600 | struct iscsi_cmd *cmd, | |
2601 | struct iscsi_conn *conn) | |
2602 | { | |
2603 | int niov = 0, tx_size; | |
2604 | struct iscsi_conn *logout_conn = NULL; | |
2605 | struct iscsi_conn_recovery *cr = NULL; | |
2606 | struct iscsi_session *sess = conn->sess; | |
2607 | struct kvec *iov; | |
2608 | struct iscsi_logout_rsp *hdr; | |
2609 | /* | |
2610 | * The actual shutting down of Sessions and/or Connections | |
2611 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2612 | * is done in scsi_logout_post_handler(). | |
2613 | */ | |
2614 | switch (cmd->logout_reason) { | |
2615 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2616 | pr_debug("iSCSI session logout successful, setting" | |
2617 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2618 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2619 | break; | |
2620 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2621 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2622 | break; | |
2623 | /* | |
2624 | * For CLOSECONNECTION logout requests carrying | |
2625 | * a matching logout CID -> local CID, the reference | |
2626 | * for the local CID will have been incremented in | |
2627 | * iscsi_logout_closeconnection(). | |
2628 | * | |
2629 | * For CLOSECONNECTION logout requests carrying | |
2630 | * a different CID than the connection it arrived | |
2631 | * on, the connection responding to cmd->logout_cid | |
2632 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2633 | */ | |
2634 | ||
2635 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2636 | " successful.\n", cmd->logout_cid, conn->cid); | |
2637 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2638 | break; | |
2639 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2640 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2641 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2642 | break; | |
2643 | /* | |
2644 | * If the connection is still active from our point of view | |
2645 | * force connection recovery to occur. | |
2646 | */ | |
2647 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2648 | cmd->logout_cid); | |
2649 | if ((logout_conn)) { | |
2650 | iscsit_connection_reinstatement_rcfr(logout_conn); | |
2651 | iscsit_dec_conn_usage_count(logout_conn); | |
2652 | } | |
2653 | ||
2654 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2655 | conn->sess, cmd->logout_cid); | |
2656 | if (!cr) { | |
2657 | pr_err("Unable to locate CID: %hu for" | |
2658 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2659 | cmd->logout_cid); | |
2660 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2661 | break; | |
2662 | } | |
2663 | ||
2664 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2665 | ||
2666 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2667 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2668 | cmd->logout_cid, conn->cid); | |
2669 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2670 | break; | |
2671 | default: | |
2672 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2673 | cmd->logout_reason); | |
2674 | return -1; | |
2675 | } | |
2676 | ||
2677 | tx_size = ISCSI_HDR_LEN; | |
2678 | hdr = (struct iscsi_logout_rsp *)cmd->pdu; | |
2679 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2680 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; | |
2681 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2682 | hdr->response = cmd->logout_response; | |
2683 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
2684 | cmd->stat_sn = conn->stat_sn++; | |
2685 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2686 | ||
2687 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2688 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2689 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2690 | ||
2691 | iov = &cmd->iov_misc[0]; | |
2692 | iov[niov].iov_base = cmd->pdu; | |
2693 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2694 | ||
2695 | if (conn->conn_ops->HeaderDigest) { | |
2696 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2697 | ||
2698 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2699 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2700 | 0, NULL, (u8 *)header_digest); | |
2701 | ||
2702 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2703 | tx_size += ISCSI_CRC_LEN; | |
2704 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2705 | " Logout Response 0x%08x\n", *header_digest); | |
2706 | } | |
2707 | cmd->iov_misc_count = niov; | |
2708 | cmd->tx_size = tx_size; | |
2709 | ||
2710 | pr_debug("Sending Logout Response ITT: 0x%08x StatSN:" | |
2711 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2712 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2713 | cmd->logout_cid, conn->cid); | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | /* | |
2719 | * Unsolicited NOPIN, either requesting a response or not. | |
2720 | */ | |
2721 | static int iscsit_send_unsolicited_nopin( | |
2722 | struct iscsi_cmd *cmd, | |
2723 | struct iscsi_conn *conn, | |
2724 | int want_response) | |
2725 | { | |
2726 | int tx_size = ISCSI_HDR_LEN; | |
2727 | struct iscsi_nopin *hdr; | |
2728 | ||
2729 | hdr = (struct iscsi_nopin *) cmd->pdu; | |
2730 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2731 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2732 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2733 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
2734 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2735 | cmd->stat_sn = conn->stat_sn; | |
2736 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2737 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2738 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2739 | ||
2740 | if (conn->conn_ops->HeaderDigest) { | |
2741 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2742 | ||
2743 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2744 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2745 | 0, NULL, (u8 *)header_digest); | |
2746 | ||
2747 | tx_size += ISCSI_CRC_LEN; | |
2748 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2749 | " NopIN 0x%08x\n", *header_digest); | |
2750 | } | |
2751 | ||
2752 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2753 | cmd->iov_misc[0].iov_len = tx_size; | |
2754 | cmd->iov_misc_count = 1; | |
2755 | cmd->tx_size = tx_size; | |
2756 | ||
2757 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" | |
2758 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2759 | ||
2760 | return 0; | |
2761 | } | |
2762 | ||
2763 | static int iscsit_send_nopin_response( | |
2764 | struct iscsi_cmd *cmd, | |
2765 | struct iscsi_conn *conn) | |
2766 | { | |
2767 | int niov = 0, tx_size; | |
2768 | u32 padding = 0; | |
2769 | struct kvec *iov; | |
2770 | struct iscsi_nopin *hdr; | |
2771 | ||
2772 | tx_size = ISCSI_HDR_LEN; | |
2773 | hdr = (struct iscsi_nopin *) cmd->pdu; | |
2774 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2775 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2776 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2777 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2778 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2779 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
2780 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2781 | cmd->stat_sn = conn->stat_sn++; | |
2782 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2783 | ||
2784 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2785 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2786 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2787 | ||
2788 | iov = &cmd->iov_misc[0]; | |
2789 | iov[niov].iov_base = cmd->pdu; | |
2790 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2791 | ||
2792 | if (conn->conn_ops->HeaderDigest) { | |
2793 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2794 | ||
2795 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2796 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2797 | 0, NULL, (u8 *)header_digest); | |
2798 | ||
2799 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2800 | tx_size += ISCSI_CRC_LEN; | |
2801 | pr_debug("Attaching CRC32C HeaderDigest" | |
2802 | " to NopIn 0x%08x\n", *header_digest); | |
2803 | } | |
2804 | ||
2805 | /* | |
2806 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
2807 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
2808 | */ | |
2809 | if (cmd->buf_ptr_size) { | |
2810 | iov[niov].iov_base = cmd->buf_ptr; | |
2811 | iov[niov++].iov_len = cmd->buf_ptr_size; | |
2812 | tx_size += cmd->buf_ptr_size; | |
2813 | ||
2814 | pr_debug("Echoing back %u bytes of ping" | |
2815 | " data.\n", cmd->buf_ptr_size); | |
2816 | ||
2817 | padding = ((-cmd->buf_ptr_size) & 3); | |
2818 | if (padding != 0) { | |
2819 | iov[niov].iov_base = &cmd->pad_bytes; | |
2820 | iov[niov++].iov_len = padding; | |
2821 | tx_size += padding; | |
2822 | pr_debug("Attaching %u additional" | |
2823 | " padding bytes.\n", padding); | |
2824 | } | |
2825 | if (conn->conn_ops->DataDigest) { | |
2826 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2827 | cmd->buf_ptr, cmd->buf_ptr_size, | |
2828 | padding, (u8 *)&cmd->pad_bytes, | |
2829 | (u8 *)&cmd->data_crc); | |
2830 | ||
2831 | iov[niov].iov_base = &cmd->data_crc; | |
2832 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2833 | tx_size += ISCSI_CRC_LEN; | |
2834 | pr_debug("Attached DataDigest for %u" | |
2835 | " bytes of ping data, CRC 0x%08x\n", | |
2836 | cmd->buf_ptr_size, cmd->data_crc); | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | cmd->iov_misc_count = niov; | |
2841 | cmd->tx_size = tx_size; | |
2842 | ||
2843 | pr_debug("Sending NOPIN Response ITT: 0x%08x, TTT:" | |
2844 | " 0x%08x, StatSN: 0x%08x, Length %u\n", cmd->init_task_tag, | |
2845 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2846 | ||
2847 | return 0; | |
2848 | } | |
2849 | ||
2850 | int iscsit_send_r2t( | |
2851 | struct iscsi_cmd *cmd, | |
2852 | struct iscsi_conn *conn) | |
2853 | { | |
2854 | int tx_size = 0; | |
2855 | struct iscsi_r2t *r2t; | |
2856 | struct iscsi_r2t_rsp *hdr; | |
2857 | ||
2858 | r2t = iscsit_get_r2t_from_list(cmd); | |
2859 | if (!r2t) | |
2860 | return -1; | |
2861 | ||
2862 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
2863 | memset(hdr, 0, ISCSI_HDR_LEN); | |
2864 | hdr->opcode = ISCSI_OP_R2T; | |
2865 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2866 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2867 | (struct scsi_lun *)&hdr->lun); | |
2868 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
2869 | spin_lock_bh(&conn->sess->ttt_lock); | |
2870 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
2871 | if (r2t->targ_xfer_tag == 0xFFFFFFFF) | |
2872 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
2873 | spin_unlock_bh(&conn->sess->ttt_lock); | |
2874 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); | |
2875 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
2876 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2877 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2878 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); | |
2879 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
2880 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
2881 | ||
2882 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2883 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
2884 | tx_size += ISCSI_HDR_LEN; | |
2885 | ||
2886 | if (conn->conn_ops->HeaderDigest) { | |
2887 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2888 | ||
2889 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2890 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2891 | 0, NULL, (u8 *)header_digest); | |
2892 | ||
2893 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
2894 | tx_size += ISCSI_CRC_LEN; | |
2895 | pr_debug("Attaching CRC32 HeaderDigest for R2T" | |
2896 | " PDU 0x%08x\n", *header_digest); | |
2897 | } | |
2898 | ||
2899 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" | |
2900 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
2901 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
2902 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
2903 | r2t->offset, r2t->xfer_len, conn->cid); | |
2904 | ||
2905 | cmd->iov_misc_count = 1; | |
2906 | cmd->tx_size = tx_size; | |
2907 | ||
2908 | spin_lock_bh(&cmd->r2t_lock); | |
2909 | r2t->sent_r2t = 1; | |
2910 | spin_unlock_bh(&cmd->r2t_lock); | |
2911 | ||
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | /* | |
2916 | * type 0: Normal Operation. | |
2917 | * type 1: Called from Storage Transport. | |
2918 | * type 2: Called from iscsi_task_reassign_complete_write() for | |
2919 | * connection recovery. | |
2920 | */ | |
2921 | int iscsit_build_r2ts_for_cmd( | |
2922 | struct iscsi_cmd *cmd, | |
2923 | struct iscsi_conn *conn, | |
2924 | int type) | |
2925 | { | |
2926 | int first_r2t = 1; | |
2927 | u32 offset = 0, xfer_len = 0; | |
2928 | ||
2929 | spin_lock_bh(&cmd->r2t_lock); | |
2930 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
2931 | spin_unlock_bh(&cmd->r2t_lock); | |
2932 | return 0; | |
2933 | } | |
2934 | ||
2935 | if (conn->sess->sess_ops->DataSequenceInOrder && (type != 2)) | |
2936 | if (cmd->r2t_offset < cmd->write_data_done) | |
2937 | cmd->r2t_offset = cmd->write_data_done; | |
2938 | ||
2939 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
2940 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
2941 | offset = cmd->r2t_offset; | |
2942 | ||
2943 | if (first_r2t && (type == 2)) { | |
2944 | xfer_len = ((offset + | |
2945 | (conn->sess->sess_ops->MaxBurstLength - | |
2946 | cmd->next_burst_len) > | |
2947 | cmd->data_length) ? | |
2948 | (cmd->data_length - offset) : | |
2949 | (conn->sess->sess_ops->MaxBurstLength - | |
2950 | cmd->next_burst_len)); | |
2951 | } else { | |
2952 | xfer_len = ((offset + | |
2953 | conn->sess->sess_ops->MaxBurstLength) > | |
2954 | cmd->data_length) ? | |
2955 | (cmd->data_length - offset) : | |
2956 | conn->sess->sess_ops->MaxBurstLength; | |
2957 | } | |
2958 | cmd->r2t_offset += xfer_len; | |
2959 | ||
2960 | if (cmd->r2t_offset == cmd->data_length) | |
2961 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
2962 | } else { | |
2963 | struct iscsi_seq *seq; | |
2964 | ||
2965 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
2966 | if (!seq) { | |
2967 | spin_unlock_bh(&cmd->r2t_lock); | |
2968 | return -1; | |
2969 | } | |
2970 | ||
2971 | offset = seq->offset; | |
2972 | xfer_len = seq->xfer_len; | |
2973 | ||
2974 | if (cmd->seq_send_order == cmd->seq_count) | |
2975 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
2976 | } | |
2977 | cmd->outstanding_r2ts++; | |
2978 | first_r2t = 0; | |
2979 | ||
2980 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
2981 | spin_unlock_bh(&cmd->r2t_lock); | |
2982 | return -1; | |
2983 | } | |
2984 | ||
2985 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
2986 | break; | |
2987 | } | |
2988 | spin_unlock_bh(&cmd->r2t_lock); | |
2989 | ||
2990 | return 0; | |
2991 | } | |
2992 | ||
2993 | static int iscsit_send_status( | |
2994 | struct iscsi_cmd *cmd, | |
2995 | struct iscsi_conn *conn) | |
2996 | { | |
2997 | u8 iov_count = 0, recovery; | |
2998 | u32 padding = 0, tx_size = 0; | |
2999 | struct iscsi_scsi_rsp *hdr; | |
3000 | struct kvec *iov; | |
3001 | ||
3002 | recovery = (cmd->i_state != ISTATE_SEND_STATUS); | |
3003 | if (!recovery) | |
3004 | cmd->stat_sn = conn->stat_sn++; | |
3005 | ||
3006 | spin_lock_bh(&conn->sess->session_stats_lock); | |
3007 | conn->sess->rsp_pdus++; | |
3008 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
3009 | ||
3010 | hdr = (struct iscsi_scsi_rsp *) cmd->pdu; | |
3011 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3012 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3013 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3014 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3015 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3016 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3017 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3018 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3019 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3020 | } |
3021 | hdr->response = cmd->iscsi_response; | |
3022 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
3023 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
3024 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3025 | ||
3026 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3027 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3028 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3029 | ||
3030 | iov = &cmd->iov_misc[0]; | |
3031 | iov[iov_count].iov_base = cmd->pdu; | |
3032 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3033 | tx_size += ISCSI_HDR_LEN; | |
3034 | ||
3035 | /* | |
3036 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3037 | */ | |
3038 | if (cmd->se_cmd.sense_buffer && | |
3039 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3040 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
3041 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; | |
3042 | hton24(hdr->dlength, cmd->se_cmd.scsi_sense_length); | |
3043 | iov[iov_count].iov_base = cmd->se_cmd.sense_buffer; | |
3044 | iov[iov_count++].iov_len = | |
3045 | (cmd->se_cmd.scsi_sense_length + padding); | |
3046 | tx_size += cmd->se_cmd.scsi_sense_length; | |
3047 | ||
3048 | if (padding) { | |
3049 | memset(cmd->se_cmd.sense_buffer + | |
3050 | cmd->se_cmd.scsi_sense_length, 0, padding); | |
3051 | tx_size += padding; | |
3052 | pr_debug("Adding %u bytes of padding to" | |
3053 | " SENSE.\n", padding); | |
3054 | } | |
3055 | ||
3056 | if (conn->conn_ops->DataDigest) { | |
3057 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3058 | cmd->se_cmd.sense_buffer, | |
3059 | (cmd->se_cmd.scsi_sense_length + padding), | |
3060 | 0, NULL, (u8 *)&cmd->data_crc); | |
3061 | ||
3062 | iov[iov_count].iov_base = &cmd->data_crc; | |
3063 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3064 | tx_size += ISCSI_CRC_LEN; | |
3065 | ||
3066 | pr_debug("Attaching CRC32 DataDigest for" | |
3067 | " SENSE, %u bytes CRC 0x%08x\n", | |
3068 | (cmd->se_cmd.scsi_sense_length + padding), | |
3069 | cmd->data_crc); | |
3070 | } | |
3071 | ||
3072 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" | |
3073 | " Response PDU\n", | |
3074 | cmd->se_cmd.scsi_sense_length); | |
3075 | } | |
3076 | ||
3077 | if (conn->conn_ops->HeaderDigest) { | |
3078 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3079 | ||
3080 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3081 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3082 | 0, NULL, (u8 *)header_digest); | |
3083 | ||
3084 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3085 | tx_size += ISCSI_CRC_LEN; | |
3086 | pr_debug("Attaching CRC32 HeaderDigest for Response" | |
3087 | " PDU 0x%08x\n", *header_digest); | |
3088 | } | |
3089 | ||
3090 | cmd->iov_misc_count = iov_count; | |
3091 | cmd->tx_size = tx_size; | |
3092 | ||
3093 | pr_debug("Built %sSCSI Response, ITT: 0x%08x, StatSN: 0x%08x," | |
3094 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3095 | (!recovery) ? "" : "Recovery ", cmd->init_task_tag, | |
3096 | cmd->stat_sn, 0x00, cmd->se_cmd.scsi_status, conn->cid); | |
3097 | ||
3098 | return 0; | |
3099 | } | |
3100 | ||
3101 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3102 | { | |
3103 | switch (se_tmr->response) { | |
3104 | case TMR_FUNCTION_COMPLETE: | |
3105 | return ISCSI_TMF_RSP_COMPLETE; | |
3106 | case TMR_TASK_DOES_NOT_EXIST: | |
3107 | return ISCSI_TMF_RSP_NO_TASK; | |
3108 | case TMR_LUN_DOES_NOT_EXIST: | |
3109 | return ISCSI_TMF_RSP_NO_LUN; | |
3110 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3111 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
3112 | case TMR_FUNCTION_AUTHORIZATION_FAILED: | |
3113 | return ISCSI_TMF_RSP_AUTH_FAILED; | |
3114 | case TMR_FUNCTION_REJECTED: | |
3115 | default: | |
3116 | return ISCSI_TMF_RSP_REJECTED; | |
3117 | } | |
3118 | } | |
3119 | ||
3120 | static int iscsit_send_task_mgt_rsp( | |
3121 | struct iscsi_cmd *cmd, | |
3122 | struct iscsi_conn *conn) | |
3123 | { | |
3124 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
3125 | struct iscsi_tm_rsp *hdr; | |
3126 | u32 tx_size = 0; | |
3127 | ||
3128 | hdr = (struct iscsi_tm_rsp *) cmd->pdu; | |
3129 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3130 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; | |
7ae0b103 | 3131 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce NB |
3132 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
3133 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
3134 | cmd->stat_sn = conn->stat_sn++; | |
3135 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3136 | ||
3137 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3138 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3139 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3140 | ||
3141 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
3142 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3143 | tx_size += ISCSI_HDR_LEN; | |
3144 | ||
3145 | if (conn->conn_ops->HeaderDigest) { | |
3146 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3147 | ||
3148 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3149 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3150 | 0, NULL, (u8 *)header_digest); | |
3151 | ||
3152 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3153 | tx_size += ISCSI_CRC_LEN; | |
3154 | pr_debug("Attaching CRC32 HeaderDigest for Task" | |
3155 | " Mgmt Response PDU 0x%08x\n", *header_digest); | |
3156 | } | |
3157 | ||
3158 | cmd->iov_misc_count = 1; | |
3159 | cmd->tx_size = tx_size; | |
3160 | ||
3161 | pr_debug("Built Task Management Response ITT: 0x%08x," | |
3162 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3163 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3164 | ||
3165 | return 0; | |
3166 | } | |
3167 | ||
2f9bc894 NB |
3168 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3169 | { | |
3170 | bool ret = false; | |
3171 | ||
3172 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3173 | const struct sockaddr_in6 sin6 = { | |
3174 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3175 | struct sockaddr_in6 *sock_in6 = | |
3176 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3177 | ||
3178 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3179 | sin6.sin6_addr.s6_addr, 16)) | |
3180 | ret = true; | |
3181 | } else { | |
3182 | struct sockaddr_in * sock_in = | |
3183 | (struct sockaddr_in *)&np->np_sockaddr; | |
3184 | ||
3185 | if (sock_in->sin_addr.s_addr == INADDR_ANY) | |
3186 | ret = true; | |
3187 | } | |
3188 | ||
3189 | return ret; | |
3190 | } | |
3191 | ||
e48354ce NB |
3192 | static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) |
3193 | { | |
3194 | char *payload = NULL; | |
3195 | struct iscsi_conn *conn = cmd->conn; | |
3196 | struct iscsi_portal_group *tpg; | |
3197 | struct iscsi_tiqn *tiqn; | |
3198 | struct iscsi_tpg_np *tpg_np; | |
3199 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
3200 | unsigned char buf[256]; | |
3201 | ||
3202 | buffer_len = (conn->conn_ops->MaxRecvDataSegmentLength > 32768) ? | |
3203 | 32768 : conn->conn_ops->MaxRecvDataSegmentLength; | |
3204 | ||
3205 | memset(buf, 0, 256); | |
3206 | ||
3207 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3208 | if (!payload) { | |
3209 | pr_err("Unable to allocate memory for sendtargets" | |
3210 | " response.\n"); | |
3211 | return -ENOMEM; | |
3212 | } | |
3213 | ||
3214 | spin_lock(&tiqn_lock); | |
3215 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
3216 | len = sprintf(buf, "TargetName=%s", tiqn->tiqn); | |
3217 | len += 1; | |
3218 | ||
3219 | if ((len + payload_len) > buffer_len) { | |
3220 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3221 | end_of_buf = 1; | |
3222 | goto eob; | |
3223 | } | |
8359cf43 | 3224 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3225 | payload_len += len; |
3226 | ||
3227 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3228 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3229 | ||
3230 | spin_lock(&tpg->tpg_state_lock); | |
3231 | if ((tpg->tpg_state == TPG_STATE_FREE) || | |
3232 | (tpg->tpg_state == TPG_STATE_INACTIVE)) { | |
3233 | spin_unlock(&tpg->tpg_state_lock); | |
3234 | continue; | |
3235 | } | |
3236 | spin_unlock(&tpg->tpg_state_lock); | |
3237 | ||
3238 | spin_lock(&tpg->tpg_np_lock); | |
3239 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3240 | tpg_np_list) { | |
2f9bc894 NB |
3241 | struct iscsi_np *np = tpg_np->tpg_np; |
3242 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
3243 | ||
e48354ce NB |
3244 | len = sprintf(buf, "TargetAddress=" |
3245 | "%s%s%s:%hu,%hu", | |
2f9bc894 NB |
3246 | (np->np_sockaddr.ss_family == AF_INET6) ? |
3247 | "[" : "", (inaddr_any == false) ? | |
3248 | np->np_ip : conn->local_ip, | |
3249 | (np->np_sockaddr.ss_family == AF_INET6) ? | |
3250 | "]" : "", (inaddr_any == false) ? | |
3251 | np->np_port : conn->local_port, | |
e48354ce NB |
3252 | tpg->tpgt); |
3253 | len += 1; | |
3254 | ||
3255 | if ((len + payload_len) > buffer_len) { | |
3256 | spin_unlock(&tpg->tpg_np_lock); | |
3257 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3258 | end_of_buf = 1; | |
3259 | goto eob; | |
3260 | } | |
8359cf43 | 3261 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3262 | payload_len += len; |
3263 | } | |
3264 | spin_unlock(&tpg->tpg_np_lock); | |
3265 | } | |
3266 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3267 | eob: | |
3268 | if (end_of_buf) | |
3269 | break; | |
3270 | } | |
3271 | spin_unlock(&tiqn_lock); | |
3272 | ||
3273 | cmd->buf_ptr = payload; | |
3274 | ||
3275 | return payload_len; | |
3276 | } | |
3277 | ||
3278 | /* | |
3279 | * FIXME: Add support for F_BIT and C_BIT when the length is longer than | |
3280 | * MaxRecvDataSegmentLength. | |
3281 | */ | |
3282 | static int iscsit_send_text_rsp( | |
3283 | struct iscsi_cmd *cmd, | |
3284 | struct iscsi_conn *conn) | |
3285 | { | |
3286 | struct iscsi_text_rsp *hdr; | |
3287 | struct kvec *iov; | |
3288 | u32 padding = 0, tx_size = 0; | |
3289 | int text_length, iov_count = 0; | |
3290 | ||
3291 | text_length = iscsit_build_sendtargets_response(cmd); | |
3292 | if (text_length < 0) | |
3293 | return text_length; | |
3294 | ||
3295 | padding = ((-text_length) & 3); | |
3296 | if (padding != 0) { | |
3297 | memset(cmd->buf_ptr + text_length, 0, padding); | |
3298 | pr_debug("Attaching %u additional bytes for" | |
3299 | " padding.\n", padding); | |
3300 | } | |
3301 | ||
3302 | hdr = (struct iscsi_text_rsp *) cmd->pdu; | |
3303 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3304 | hdr->opcode = ISCSI_OP_TEXT_RSP; | |
3305 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3306 | hton24(hdr->dlength, text_length); | |
3307 | hdr->itt = cpu_to_be32(cmd->init_task_tag); | |
3308 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3309 | cmd->stat_sn = conn->stat_sn++; | |
3310 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3311 | ||
3312 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3313 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3314 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3315 | ||
3316 | iov = &cmd->iov_misc[0]; | |
3317 | ||
3318 | iov[iov_count].iov_base = cmd->pdu; | |
3319 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3320 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3321 | iov[iov_count++].iov_len = text_length + padding; | |
3322 | ||
3323 | tx_size += (ISCSI_HDR_LEN + text_length + padding); | |
3324 | ||
3325 | if (conn->conn_ops->HeaderDigest) { | |
3326 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3327 | ||
3328 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3329 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3330 | 0, NULL, (u8 *)header_digest); | |
3331 | ||
3332 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3333 | tx_size += ISCSI_CRC_LEN; | |
3334 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3335 | " Text Response PDU 0x%08x\n", *header_digest); | |
3336 | } | |
3337 | ||
3338 | if (conn->conn_ops->DataDigest) { | |
3339 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3340 | cmd->buf_ptr, (text_length + padding), | |
3341 | 0, NULL, (u8 *)&cmd->data_crc); | |
3342 | ||
3343 | iov[iov_count].iov_base = &cmd->data_crc; | |
3344 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3345 | tx_size += ISCSI_CRC_LEN; | |
3346 | ||
3347 | pr_debug("Attaching DataDigest for %u bytes of text" | |
3348 | " data, CRC 0x%08x\n", (text_length + padding), | |
3349 | cmd->data_crc); | |
3350 | } | |
3351 | ||
3352 | cmd->iov_misc_count = iov_count; | |
3353 | cmd->tx_size = tx_size; | |
3354 | ||
3355 | pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," | |
3356 | " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, | |
3357 | text_length, conn->cid); | |
3358 | return 0; | |
3359 | } | |
3360 | ||
3361 | static int iscsit_send_reject( | |
3362 | struct iscsi_cmd *cmd, | |
3363 | struct iscsi_conn *conn) | |
3364 | { | |
3365 | u32 iov_count = 0, tx_size = 0; | |
3366 | struct iscsi_reject *hdr; | |
3367 | struct kvec *iov; | |
3368 | ||
3369 | hdr = (struct iscsi_reject *) cmd->pdu; | |
3370 | hdr->opcode = ISCSI_OP_REJECT; | |
3371 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3372 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3373 | cmd->stat_sn = conn->stat_sn++; | |
3374 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3375 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3376 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3377 | ||
3378 | iov = &cmd->iov_misc[0]; | |
3379 | ||
3380 | iov[iov_count].iov_base = cmd->pdu; | |
3381 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3382 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3383 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3384 | ||
3385 | tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); | |
3386 | ||
3387 | if (conn->conn_ops->HeaderDigest) { | |
3388 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3389 | ||
3390 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3391 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3392 | 0, NULL, (u8 *)header_digest); | |
3393 | ||
3394 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3395 | tx_size += ISCSI_CRC_LEN; | |
3396 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3397 | " REJECT PDU 0x%08x\n", *header_digest); | |
3398 | } | |
3399 | ||
3400 | if (conn->conn_ops->DataDigest) { | |
3401 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3402 | (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN, | |
3403 | 0, NULL, (u8 *)&cmd->data_crc); | |
3404 | ||
3405 | iov[iov_count].iov_base = &cmd->data_crc; | |
3406 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3407 | tx_size += ISCSI_CRC_LEN; | |
3408 | pr_debug("Attaching CRC32 DataDigest for REJECT" | |
3409 | " PDU 0x%08x\n", cmd->data_crc); | |
3410 | } | |
3411 | ||
3412 | cmd->iov_misc_count = iov_count; | |
3413 | cmd->tx_size = tx_size; | |
3414 | ||
3415 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," | |
3416 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3417 | ||
3418 | return 0; | |
3419 | } | |
3420 | ||
3421 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
3422 | { | |
3423 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
3424 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
3425 | wait_for_completion_interruptible_timeout( | |
3426 | &conn->tx_half_close_comp, | |
3427 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
3428 | } | |
3429 | } | |
3430 | ||
3431 | #ifdef CONFIG_SMP | |
3432 | ||
3433 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) | |
3434 | { | |
3435 | struct iscsi_thread_set *ts = conn->thread_set; | |
3436 | int ord, cpu; | |
3437 | /* | |
3438 | * thread_id is assigned from iscsit_global->ts_bitmap from | |
3439 | * within iscsi_thread_set.c:iscsi_allocate_thread_sets() | |
3440 | * | |
3441 | * Here we use thread_id to determine which CPU that this | |
3442 | * iSCSI connection's iscsi_thread_set will be scheduled to | |
3443 | * execute upon. | |
3444 | */ | |
3445 | ord = ts->thread_id % cpumask_weight(cpu_online_mask); | |
3446 | #if 0 | |
3447 | pr_debug(">>>>>>>>>>>>>>>>>>>> Generated ord: %d from" | |
3448 | " thread_id: %d\n", ord, ts->thread_id); | |
3449 | #endif | |
3450 | for_each_online_cpu(cpu) { | |
3451 | if (ord-- == 0) { | |
3452 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3453 | return; | |
3454 | } | |
3455 | } | |
3456 | /* | |
3457 | * This should never be reached.. | |
3458 | */ | |
3459 | dump_stack(); | |
3460 | cpumask_setall(conn->conn_cpumask); | |
3461 | } | |
3462 | ||
3463 | static inline void iscsit_thread_check_cpumask( | |
3464 | struct iscsi_conn *conn, | |
3465 | struct task_struct *p, | |
3466 | int mode) | |
3467 | { | |
3468 | char buf[128]; | |
3469 | /* | |
3470 | * mode == 1 signals iscsi_target_tx_thread() usage. | |
3471 | * mode == 0 signals iscsi_target_rx_thread() usage. | |
3472 | */ | |
3473 | if (mode == 1) { | |
3474 | if (!conn->conn_tx_reset_cpumask) | |
3475 | return; | |
3476 | conn->conn_tx_reset_cpumask = 0; | |
3477 | } else { | |
3478 | if (!conn->conn_rx_reset_cpumask) | |
3479 | return; | |
3480 | conn->conn_rx_reset_cpumask = 0; | |
3481 | } | |
3482 | /* | |
3483 | * Update the CPU mask for this single kthread so that | |
3484 | * both TX and RX kthreads are scheduled to run on the | |
3485 | * same CPU. | |
3486 | */ | |
3487 | memset(buf, 0, 128); | |
3488 | cpumask_scnprintf(buf, 128, conn->conn_cpumask); | |
3489 | #if 0 | |
3490 | pr_debug(">>>>>>>>>>>>>> Calling set_cpus_allowed_ptr():" | |
3491 | " %s for %s\n", buf, p->comm); | |
3492 | #endif | |
3493 | set_cpus_allowed_ptr(p, conn->conn_cpumask); | |
3494 | } | |
3495 | ||
3496 | #else | |
aadcec01 NB |
3497 | |
3498 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) | |
3499 | { | |
3500 | return; | |
3501 | } | |
3502 | ||
e48354ce NB |
3503 | #define iscsit_thread_check_cpumask(X, Y, Z) ({}) |
3504 | #endif /* CONFIG_SMP */ | |
3505 | ||
3506 | int iscsi_target_tx_thread(void *arg) | |
3507 | { | |
3508 | u8 state; | |
3509 | int eodr = 0; | |
3510 | int ret = 0; | |
3511 | int sent_status = 0; | |
3512 | int use_misc = 0; | |
3513 | int map_sg = 0; | |
3514 | struct iscsi_cmd *cmd = NULL; | |
3515 | struct iscsi_conn *conn; | |
3516 | struct iscsi_queue_req *qr = NULL; | |
3517 | struct se_cmd *se_cmd; | |
8359cf43 | 3518 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3519 | /* |
3520 | * Allow ourselves to be interrupted by SIGINT so that a | |
3521 | * connection recovery / failure event can be triggered externally. | |
3522 | */ | |
3523 | allow_signal(SIGINT); | |
3524 | ||
3525 | restart: | |
3526 | conn = iscsi_tx_thread_pre_handler(ts); | |
3527 | if (!conn) | |
3528 | goto out; | |
3529 | ||
3530 | eodr = map_sg = ret = sent_status = use_misc = 0; | |
3531 | ||
3532 | while (!kthread_should_stop()) { | |
3533 | /* | |
3534 | * Ensure that both TX and RX per connection kthreads | |
3535 | * are scheduled to run on the same CPU. | |
3536 | */ | |
3537 | iscsit_thread_check_cpumask(conn, current, 1); | |
3538 | ||
3539 | schedule_timeout_interruptible(MAX_SCHEDULE_TIMEOUT); | |
3540 | ||
3541 | if ((ts->status == ISCSI_THREAD_SET_RESET) || | |
3542 | signal_pending(current)) | |
3543 | goto transport_err; | |
3544 | ||
3545 | get_immediate: | |
3546 | qr = iscsit_get_cmd_from_immediate_queue(conn); | |
3547 | if (qr) { | |
3548 | atomic_set(&conn->check_immediate_queue, 0); | |
3549 | cmd = qr->cmd; | |
3550 | state = qr->state; | |
3551 | kmem_cache_free(lio_qr_cache, qr); | |
3552 | ||
3553 | spin_lock_bh(&cmd->istate_lock); | |
3554 | switch (state) { | |
3555 | case ISTATE_SEND_R2T: | |
3556 | spin_unlock_bh(&cmd->istate_lock); | |
3557 | ret = iscsit_send_r2t(cmd, conn); | |
3558 | break; | |
3559 | case ISTATE_REMOVE: | |
3560 | spin_unlock_bh(&cmd->istate_lock); | |
3561 | ||
3562 | if (cmd->data_direction == DMA_TO_DEVICE) | |
3563 | iscsit_stop_dataout_timer(cmd); | |
3564 | ||
3565 | spin_lock_bh(&conn->cmd_lock); | |
3566 | list_del(&cmd->i_list); | |
3567 | spin_unlock_bh(&conn->cmd_lock); | |
d270190a NB |
3568 | |
3569 | iscsit_free_cmd(cmd); | |
e48354ce NB |
3570 | goto get_immediate; |
3571 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3572 | spin_unlock_bh(&cmd->istate_lock); | |
3573 | iscsit_mod_nopin_response_timer(conn); | |
3574 | ret = iscsit_send_unsolicited_nopin(cmd, | |
3575 | conn, 1); | |
3576 | break; | |
3577 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3578 | spin_unlock_bh(&cmd->istate_lock); | |
3579 | ret = iscsit_send_unsolicited_nopin(cmd, | |
3580 | conn, 0); | |
3581 | break; | |
3582 | default: | |
3583 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3584 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3585 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3586 | conn->cid); | |
3587 | spin_unlock_bh(&cmd->istate_lock); | |
3588 | goto transport_err; | |
3589 | } | |
3590 | if (ret < 0) { | |
3591 | conn->tx_immediate_queue = 0; | |
3592 | goto transport_err; | |
3593 | } | |
3594 | ||
3595 | if (iscsit_send_tx_data(cmd, conn, 1) < 0) { | |
3596 | conn->tx_immediate_queue = 0; | |
3597 | iscsit_tx_thread_wait_for_tcp(conn); | |
3598 | goto transport_err; | |
3599 | } | |
3600 | ||
3601 | spin_lock_bh(&cmd->istate_lock); | |
3602 | switch (state) { | |
3603 | case ISTATE_SEND_R2T: | |
3604 | spin_unlock_bh(&cmd->istate_lock); | |
3605 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3606 | iscsit_start_dataout_timer(cmd, conn); | |
3607 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3608 | break; | |
3609 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3610 | cmd->i_state = ISTATE_SENT_NOPIN_WANT_RESPONSE; | |
3611 | spin_unlock_bh(&cmd->istate_lock); | |
3612 | break; | |
3613 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3614 | cmd->i_state = ISTATE_SENT_STATUS; | |
3615 | spin_unlock_bh(&cmd->istate_lock); | |
3616 | break; | |
3617 | default: | |
3618 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3619 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3620 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3621 | state, conn->cid); | |
3622 | spin_unlock_bh(&cmd->istate_lock); | |
3623 | goto transport_err; | |
3624 | } | |
3625 | goto get_immediate; | |
3626 | } else | |
3627 | conn->tx_immediate_queue = 0; | |
3628 | ||
3629 | get_response: | |
3630 | qr = iscsit_get_cmd_from_response_queue(conn); | |
3631 | if (qr) { | |
3632 | cmd = qr->cmd; | |
3633 | state = qr->state; | |
3634 | kmem_cache_free(lio_qr_cache, qr); | |
3635 | ||
3636 | spin_lock_bh(&cmd->istate_lock); | |
3637 | check_rsp_state: | |
3638 | switch (state) { | |
3639 | case ISTATE_SEND_DATAIN: | |
3640 | spin_unlock_bh(&cmd->istate_lock); | |
3641 | ret = iscsit_send_data_in(cmd, conn, | |
3642 | &eodr); | |
3643 | map_sg = 1; | |
3644 | break; | |
3645 | case ISTATE_SEND_STATUS: | |
3646 | case ISTATE_SEND_STATUS_RECOVERY: | |
3647 | spin_unlock_bh(&cmd->istate_lock); | |
3648 | use_misc = 1; | |
3649 | ret = iscsit_send_status(cmd, conn); | |
3650 | break; | |
3651 | case ISTATE_SEND_LOGOUTRSP: | |
3652 | spin_unlock_bh(&cmd->istate_lock); | |
3653 | use_misc = 1; | |
3654 | ret = iscsit_send_logout_response(cmd, conn); | |
3655 | break; | |
3656 | case ISTATE_SEND_ASYNCMSG: | |
3657 | spin_unlock_bh(&cmd->istate_lock); | |
3658 | use_misc = 1; | |
3659 | ret = iscsit_send_conn_drop_async_message( | |
3660 | cmd, conn); | |
3661 | break; | |
3662 | case ISTATE_SEND_NOPIN: | |
3663 | spin_unlock_bh(&cmd->istate_lock); | |
3664 | use_misc = 1; | |
3665 | ret = iscsit_send_nopin_response(cmd, conn); | |
3666 | break; | |
3667 | case ISTATE_SEND_REJECT: | |
3668 | spin_unlock_bh(&cmd->istate_lock); | |
3669 | use_misc = 1; | |
3670 | ret = iscsit_send_reject(cmd, conn); | |
3671 | break; | |
3672 | case ISTATE_SEND_TASKMGTRSP: | |
3673 | spin_unlock_bh(&cmd->istate_lock); | |
3674 | use_misc = 1; | |
3675 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3676 | if (ret != 0) | |
3677 | break; | |
3678 | ret = iscsit_tmr_post_handler(cmd, conn); | |
3679 | if (ret != 0) | |
3680 | iscsit_fall_back_to_erl0(conn->sess); | |
3681 | break; | |
3682 | case ISTATE_SEND_TEXTRSP: | |
3683 | spin_unlock_bh(&cmd->istate_lock); | |
3684 | use_misc = 1; | |
3685 | ret = iscsit_send_text_rsp(cmd, conn); | |
3686 | break; | |
3687 | default: | |
3688 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3689 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3690 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3691 | state, conn->cid); | |
3692 | spin_unlock_bh(&cmd->istate_lock); | |
3693 | goto transport_err; | |
3694 | } | |
3695 | if (ret < 0) { | |
3696 | conn->tx_response_queue = 0; | |
3697 | goto transport_err; | |
3698 | } | |
3699 | ||
3700 | se_cmd = &cmd->se_cmd; | |
3701 | ||
3702 | if (map_sg && !conn->conn_ops->IFMarker) { | |
3703 | if (iscsit_fe_sendpage_sg(cmd, conn) < 0) { | |
3704 | conn->tx_response_queue = 0; | |
3705 | iscsit_tx_thread_wait_for_tcp(conn); | |
3706 | iscsit_unmap_iovec(cmd); | |
3707 | goto transport_err; | |
3708 | } | |
3709 | } else { | |
3710 | if (iscsit_send_tx_data(cmd, conn, use_misc) < 0) { | |
3711 | conn->tx_response_queue = 0; | |
3712 | iscsit_tx_thread_wait_for_tcp(conn); | |
3713 | iscsit_unmap_iovec(cmd); | |
3714 | goto transport_err; | |
3715 | } | |
3716 | } | |
3717 | map_sg = 0; | |
3718 | iscsit_unmap_iovec(cmd); | |
3719 | ||
3720 | spin_lock_bh(&cmd->istate_lock); | |
3721 | switch (state) { | |
3722 | case ISTATE_SEND_DATAIN: | |
3723 | if (!eodr) | |
3724 | goto check_rsp_state; | |
3725 | ||
3726 | if (eodr == 1) { | |
3727 | cmd->i_state = ISTATE_SENT_LAST_DATAIN; | |
3728 | sent_status = 1; | |
3729 | eodr = use_misc = 0; | |
3730 | } else if (eodr == 2) { | |
3731 | cmd->i_state = state = | |
3732 | ISTATE_SEND_STATUS; | |
3733 | sent_status = 0; | |
3734 | eodr = use_misc = 0; | |
3735 | goto check_rsp_state; | |
3736 | } | |
3737 | break; | |
3738 | case ISTATE_SEND_STATUS: | |
3739 | use_misc = 0; | |
3740 | sent_status = 1; | |
3741 | break; | |
3742 | case ISTATE_SEND_ASYNCMSG: | |
3743 | case ISTATE_SEND_NOPIN: | |
3744 | case ISTATE_SEND_STATUS_RECOVERY: | |
3745 | case ISTATE_SEND_TEXTRSP: | |
3746 | use_misc = 0; | |
3747 | sent_status = 1; | |
3748 | break; | |
3749 | case ISTATE_SEND_REJECT: | |
3750 | use_misc = 0; | |
3751 | if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { | |
3752 | cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; | |
3753 | spin_unlock_bh(&cmd->istate_lock); | |
3754 | complete(&cmd->reject_comp); | |
3755 | goto transport_err; | |
3756 | } | |
3757 | complete(&cmd->reject_comp); | |
3758 | break; | |
3759 | case ISTATE_SEND_TASKMGTRSP: | |
3760 | use_misc = 0; | |
3761 | sent_status = 1; | |
3762 | break; | |
3763 | case ISTATE_SEND_LOGOUTRSP: | |
3764 | spin_unlock_bh(&cmd->istate_lock); | |
3765 | if (!iscsit_logout_post_handler(cmd, conn)) | |
3766 | goto restart; | |
3767 | spin_lock_bh(&cmd->istate_lock); | |
3768 | use_misc = 0; | |
3769 | sent_status = 1; | |
3770 | break; | |
3771 | default: | |
3772 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3773 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3774 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3775 | cmd->i_state, conn->cid); | |
3776 | spin_unlock_bh(&cmd->istate_lock); | |
3777 | goto transport_err; | |
3778 | } | |
3779 | ||
3780 | if (sent_status) { | |
3781 | cmd->i_state = ISTATE_SENT_STATUS; | |
3782 | sent_status = 0; | |
3783 | } | |
3784 | spin_unlock_bh(&cmd->istate_lock); | |
3785 | ||
3786 | if (atomic_read(&conn->check_immediate_queue)) | |
3787 | goto get_immediate; | |
3788 | ||
3789 | goto get_response; | |
3790 | } else | |
3791 | conn->tx_response_queue = 0; | |
3792 | } | |
3793 | ||
3794 | transport_err: | |
3795 | iscsit_take_action_for_connection_exit(conn); | |
3796 | goto restart; | |
3797 | out: | |
3798 | return 0; | |
3799 | } | |
3800 | ||
3801 | int iscsi_target_rx_thread(void *arg) | |
3802 | { | |
3803 | int ret; | |
3804 | u8 buffer[ISCSI_HDR_LEN], opcode; | |
3805 | u32 checksum = 0, digest = 0; | |
3806 | struct iscsi_conn *conn = NULL; | |
8359cf43 | 3807 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3808 | struct kvec iov; |
3809 | /* | |
3810 | * Allow ourselves to be interrupted by SIGINT so that a | |
3811 | * connection recovery / failure event can be triggered externally. | |
3812 | */ | |
3813 | allow_signal(SIGINT); | |
3814 | ||
3815 | restart: | |
3816 | conn = iscsi_rx_thread_pre_handler(ts); | |
3817 | if (!conn) | |
3818 | goto out; | |
3819 | ||
3820 | while (!kthread_should_stop()) { | |
3821 | /* | |
3822 | * Ensure that both TX and RX per connection kthreads | |
3823 | * are scheduled to run on the same CPU. | |
3824 | */ | |
3825 | iscsit_thread_check_cpumask(conn, current, 0); | |
3826 | ||
3827 | memset(buffer, 0, ISCSI_HDR_LEN); | |
3828 | memset(&iov, 0, sizeof(struct kvec)); | |
3829 | ||
3830 | iov.iov_base = buffer; | |
3831 | iov.iov_len = ISCSI_HDR_LEN; | |
3832 | ||
3833 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
3834 | if (ret != ISCSI_HDR_LEN) { | |
3835 | iscsit_rx_thread_wait_for_tcp(conn); | |
3836 | goto transport_err; | |
3837 | } | |
3838 | ||
3839 | /* | |
3840 | * Set conn->bad_hdr for use with REJECT PDUs. | |
3841 | */ | |
3842 | memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN); | |
3843 | ||
3844 | if (conn->conn_ops->HeaderDigest) { | |
3845 | iov.iov_base = &digest; | |
3846 | iov.iov_len = ISCSI_CRC_LEN; | |
3847 | ||
3848 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
3849 | if (ret != ISCSI_CRC_LEN) { | |
3850 | iscsit_rx_thread_wait_for_tcp(conn); | |
3851 | goto transport_err; | |
3852 | } | |
3853 | ||
3854 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
3855 | buffer, ISCSI_HDR_LEN, | |
3856 | 0, NULL, (u8 *)&checksum); | |
3857 | ||
3858 | if (digest != checksum) { | |
3859 | pr_err("HeaderDigest CRC32C failed," | |
3860 | " received 0x%08x, computed 0x%08x\n", | |
3861 | digest, checksum); | |
3862 | /* | |
3863 | * Set the PDU to 0xff so it will intentionally | |
3864 | * hit default in the switch below. | |
3865 | */ | |
3866 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
3867 | spin_lock_bh(&conn->sess->session_stats_lock); | |
3868 | conn->sess->conn_digest_errors++; | |
3869 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
3870 | } else { | |
3871 | pr_debug("Got HeaderDigest CRC32C" | |
3872 | " 0x%08x\n", checksum); | |
3873 | } | |
3874 | } | |
3875 | ||
3876 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
3877 | goto transport_err; | |
3878 | ||
3879 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
3880 | ||
3881 | if (conn->sess->sess_ops->SessionType && | |
3882 | ((!(opcode & ISCSI_OP_TEXT)) || | |
3883 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
3884 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
3885 | " while in Discovery Session, rejecting.\n", opcode); | |
3886 | iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
3887 | buffer, conn); | |
3888 | goto transport_err; | |
3889 | } | |
3890 | ||
3891 | switch (opcode) { | |
3892 | case ISCSI_OP_SCSI_CMD: | |
3893 | if (iscsit_handle_scsi_cmd(conn, buffer) < 0) | |
3894 | goto transport_err; | |
3895 | break; | |
3896 | case ISCSI_OP_SCSI_DATA_OUT: | |
3897 | if (iscsit_handle_data_out(conn, buffer) < 0) | |
3898 | goto transport_err; | |
3899 | break; | |
3900 | case ISCSI_OP_NOOP_OUT: | |
3901 | if (iscsit_handle_nop_out(conn, buffer) < 0) | |
3902 | goto transport_err; | |
3903 | break; | |
3904 | case ISCSI_OP_SCSI_TMFUNC: | |
3905 | if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0) | |
3906 | goto transport_err; | |
3907 | break; | |
3908 | case ISCSI_OP_TEXT: | |
3909 | if (iscsit_handle_text_cmd(conn, buffer) < 0) | |
3910 | goto transport_err; | |
3911 | break; | |
3912 | case ISCSI_OP_LOGOUT: | |
3913 | ret = iscsit_handle_logout_cmd(conn, buffer); | |
3914 | if (ret > 0) { | |
3915 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3916 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3917 | goto transport_err; | |
3918 | } else if (ret < 0) | |
3919 | goto transport_err; | |
3920 | break; | |
3921 | case ISCSI_OP_SNACK: | |
3922 | if (iscsit_handle_snack(conn, buffer) < 0) | |
3923 | goto transport_err; | |
3924 | break; | |
3925 | default: | |
3926 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", | |
3927 | opcode); | |
3928 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
3929 | pr_err("Cannot recover from unknown" | |
3930 | " opcode while ERL=0, closing iSCSI connection" | |
3931 | ".\n"); | |
3932 | goto transport_err; | |
3933 | } | |
3934 | if (!conn->conn_ops->OFMarker) { | |
3935 | pr_err("Unable to recover from unknown" | |
3936 | " opcode while OFMarker=No, closing iSCSI" | |
3937 | " connection.\n"); | |
3938 | goto transport_err; | |
3939 | } | |
3940 | if (iscsit_recover_from_unknown_opcode(conn) < 0) { | |
3941 | pr_err("Unable to recover from unknown" | |
3942 | " opcode, closing iSCSI connection.\n"); | |
3943 | goto transport_err; | |
3944 | } | |
3945 | break; | |
3946 | } | |
3947 | } | |
3948 | ||
3949 | transport_err: | |
3950 | if (!signal_pending(current)) | |
3951 | atomic_set(&conn->transport_failed, 1); | |
3952 | iscsit_take_action_for_connection_exit(conn); | |
3953 | goto restart; | |
3954 | out: | |
3955 | return 0; | |
3956 | } | |
3957 | ||
3958 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
3959 | { | |
3960 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; | |
3961 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
3962 | /* |
3963 | * We expect this function to only ever be called from either RX or TX | |
3964 | * thread context via iscsit_close_connection() once the other context | |
3965 | * has been reset -> returned sleeping pre-handler state. | |
3966 | */ | |
3967 | spin_lock_bh(&conn->cmd_lock); | |
3968 | list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_list) { | |
e48354ce | 3969 | |
e48354ce NB |
3970 | list_del(&cmd->i_list); |
3971 | spin_unlock_bh(&conn->cmd_lock); | |
3972 | ||
3973 | iscsit_increment_maxcmdsn(cmd, sess); | |
e48354ce | 3974 | |
d270190a | 3975 | iscsit_free_cmd(cmd); |
e48354ce NB |
3976 | |
3977 | spin_lock_bh(&conn->cmd_lock); | |
3978 | } | |
3979 | spin_unlock_bh(&conn->cmd_lock); | |
3980 | } | |
3981 | ||
3982 | static void iscsit_stop_timers_for_cmds( | |
3983 | struct iscsi_conn *conn) | |
3984 | { | |
3985 | struct iscsi_cmd *cmd; | |
3986 | ||
3987 | spin_lock_bh(&conn->cmd_lock); | |
3988 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_list) { | |
3989 | if (cmd->data_direction == DMA_TO_DEVICE) | |
3990 | iscsit_stop_dataout_timer(cmd); | |
3991 | } | |
3992 | spin_unlock_bh(&conn->cmd_lock); | |
3993 | } | |
3994 | ||
3995 | int iscsit_close_connection( | |
3996 | struct iscsi_conn *conn) | |
3997 | { | |
3998 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
3999 | struct iscsi_session *sess = conn->sess; | |
4000 | ||
4001 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4002 | " %u\n", conn->cid, sess->sid); | |
4003 | /* | |
4004 | * Always up conn_logout_comp just in case the RX Thread is sleeping | |
4005 | * and the logout response never got sent because the connection | |
4006 | * failed. | |
4007 | */ | |
4008 | complete(&conn->conn_logout_comp); | |
4009 | ||
4010 | iscsi_release_thread_set(conn); | |
4011 | ||
4012 | iscsit_stop_timers_for_cmds(conn); | |
4013 | iscsit_stop_nopin_response_timer(conn); | |
4014 | iscsit_stop_nopin_timer(conn); | |
4015 | iscsit_free_queue_reqs_for_conn(conn); | |
4016 | ||
4017 | /* | |
4018 | * During Connection recovery drop unacknowledged out of order | |
4019 | * commands for this connection, and prepare the other commands | |
4020 | * for realligence. | |
4021 | * | |
4022 | * During normal operation clear the out of order commands (but | |
4023 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4024 | * struct iscsi_cmds. | |
4025 | */ | |
4026 | if (atomic_read(&conn->connection_recovery)) { | |
4027 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4028 | iscsit_prepare_cmds_for_realligance(conn); | |
4029 | } else { | |
4030 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4031 | iscsit_release_commands_from_conn(conn); | |
4032 | } | |
4033 | ||
4034 | /* | |
4035 | * Handle decrementing session or connection usage count if | |
4036 | * a logout response was not able to be sent because the | |
4037 | * connection failed. Fall back to Session Recovery here. | |
4038 | */ | |
4039 | if (atomic_read(&conn->conn_logout_remove)) { | |
4040 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4041 | iscsit_dec_conn_usage_count(conn); | |
4042 | iscsit_dec_session_usage_count(sess); | |
4043 | } | |
4044 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4045 | iscsit_dec_conn_usage_count(conn); | |
4046 | ||
4047 | atomic_set(&conn->conn_logout_remove, 0); | |
4048 | atomic_set(&sess->session_reinstatement, 0); | |
4049 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4050 | } | |
4051 | ||
4052 | spin_lock_bh(&sess->conn_lock); | |
4053 | list_del(&conn->conn_list); | |
4054 | ||
4055 | /* | |
4056 | * Attempt to let the Initiator know this connection failed by | |
4057 | * sending an Connection Dropped Async Message on another | |
4058 | * active connection. | |
4059 | */ | |
4060 | if (atomic_read(&conn->connection_recovery)) | |
4061 | iscsit_build_conn_drop_async_message(conn); | |
4062 | ||
4063 | spin_unlock_bh(&sess->conn_lock); | |
4064 | ||
4065 | /* | |
4066 | * If connection reinstatement is being performed on this connection, | |
4067 | * up the connection reinstatement semaphore that is being blocked on | |
4068 | * in iscsit_cause_connection_reinstatement(). | |
4069 | */ | |
4070 | spin_lock_bh(&conn->state_lock); | |
4071 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4072 | spin_unlock_bh(&conn->state_lock); | |
4073 | complete(&conn->conn_wait_comp); | |
4074 | wait_for_completion(&conn->conn_post_wait_comp); | |
4075 | spin_lock_bh(&conn->state_lock); | |
4076 | } | |
4077 | ||
4078 | /* | |
4079 | * If connection reinstatement is being performed on this connection | |
4080 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4081 | * connection wait rcfr semaphore that is being blocked on | |
4082 | * an iscsit_connection_reinstatement_rcfr(). | |
4083 | */ | |
4084 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4085 | spin_unlock_bh(&conn->state_lock); | |
4086 | complete(&conn->conn_wait_rcfr_comp); | |
4087 | wait_for_completion(&conn->conn_post_wait_comp); | |
4088 | spin_lock_bh(&conn->state_lock); | |
4089 | } | |
4090 | atomic_set(&conn->connection_reinstatement, 1); | |
4091 | spin_unlock_bh(&conn->state_lock); | |
4092 | ||
4093 | /* | |
4094 | * If any other processes are accessing this connection pointer we | |
4095 | * must wait until they have completed. | |
4096 | */ | |
4097 | iscsit_check_conn_usage_count(conn); | |
4098 | ||
4099 | if (conn->conn_rx_hash.tfm) | |
4100 | crypto_free_hash(conn->conn_rx_hash.tfm); | |
4101 | if (conn->conn_tx_hash.tfm) | |
4102 | crypto_free_hash(conn->conn_tx_hash.tfm); | |
4103 | ||
4104 | if (conn->conn_cpumask) | |
4105 | free_cpumask_var(conn->conn_cpumask); | |
4106 | ||
4107 | kfree(conn->conn_ops); | |
4108 | conn->conn_ops = NULL; | |
4109 | ||
4110 | if (conn->sock) { | |
4111 | if (conn->conn_flags & CONNFLAG_SCTP_STRUCT_FILE) { | |
4112 | kfree(conn->sock->file); | |
4113 | conn->sock->file = NULL; | |
4114 | } | |
4115 | sock_release(conn->sock); | |
4116 | } | |
4117 | conn->thread_set = NULL; | |
4118 | ||
4119 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); | |
4120 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4121 | kfree(conn); | |
4122 | ||
4123 | spin_lock_bh(&sess->conn_lock); | |
4124 | atomic_dec(&sess->nconn); | |
4125 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4126 | " %s\n", atomic_read(&sess->nconn), | |
4127 | sess->sess_ops->InitiatorName); | |
4128 | /* | |
4129 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4130 | * Session that they all fail. | |
4131 | */ | |
4132 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4133 | !atomic_read(&sess->session_logout)) | |
4134 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4135 | ||
4136 | /* | |
4137 | * If this was not the last connection in the session, and we are | |
4138 | * performing session reinstatement or falling back to ERL=0, call | |
4139 | * iscsit_stop_session() without sleeping to shutdown the other | |
4140 | * active connections. | |
4141 | */ | |
4142 | if (atomic_read(&sess->nconn)) { | |
4143 | if (!atomic_read(&sess->session_reinstatement) && | |
4144 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4145 | spin_unlock_bh(&sess->conn_lock); | |
4146 | return 0; | |
4147 | } | |
4148 | if (!atomic_read(&sess->session_stop_active)) { | |
4149 | atomic_set(&sess->session_stop_active, 1); | |
4150 | spin_unlock_bh(&sess->conn_lock); | |
4151 | iscsit_stop_session(sess, 0, 0); | |
4152 | return 0; | |
4153 | } | |
4154 | spin_unlock_bh(&sess->conn_lock); | |
4155 | return 0; | |
4156 | } | |
4157 | ||
4158 | /* | |
4159 | * If this was the last connection in the session and one of the | |
4160 | * following is occurring: | |
4161 | * | |
4162 | * Session Reinstatement is not being performed, and are falling back | |
4163 | * to ERL=0 call iscsit_close_session(). | |
4164 | * | |
4165 | * Session Logout was requested. iscsit_close_session() will be called | |
4166 | * elsewhere. | |
4167 | * | |
4168 | * Session Continuation is not being performed, start the Time2Retain | |
4169 | * handler and check if sleep_on_sess_wait_sem is active. | |
4170 | */ | |
4171 | if (!atomic_read(&sess->session_reinstatement) && | |
4172 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4173 | spin_unlock_bh(&sess->conn_lock); | |
4174 | iscsit_close_session(sess); | |
4175 | ||
4176 | return 0; | |
4177 | } else if (atomic_read(&sess->session_logout)) { | |
4178 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4179 | sess->session_state = TARG_SESS_STATE_FREE; | |
4180 | spin_unlock_bh(&sess->conn_lock); | |
4181 | ||
4182 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4183 | complete(&sess->session_wait_comp); | |
4184 | ||
4185 | return 0; | |
4186 | } else { | |
4187 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4188 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4189 | ||
4190 | if (!atomic_read(&sess->session_continuation)) { | |
4191 | spin_unlock_bh(&sess->conn_lock); | |
4192 | iscsit_start_time2retain_handler(sess); | |
4193 | } else | |
4194 | spin_unlock_bh(&sess->conn_lock); | |
4195 | ||
4196 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4197 | complete(&sess->session_wait_comp); | |
4198 | ||
4199 | return 0; | |
4200 | } | |
4201 | spin_unlock_bh(&sess->conn_lock); | |
4202 | ||
4203 | return 0; | |
4204 | } | |
4205 | ||
4206 | int iscsit_close_session(struct iscsi_session *sess) | |
4207 | { | |
4208 | struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); | |
4209 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4210 | ||
4211 | if (atomic_read(&sess->nconn)) { | |
4212 | pr_err("%d connection(s) still exist for iSCSI session" | |
4213 | " to %s\n", atomic_read(&sess->nconn), | |
4214 | sess->sess_ops->InitiatorName); | |
4215 | BUG(); | |
4216 | } | |
4217 | ||
4218 | spin_lock_bh(&se_tpg->session_lock); | |
4219 | atomic_set(&sess->session_logout, 1); | |
4220 | atomic_set(&sess->session_reinstatement, 1); | |
4221 | iscsit_stop_time2retain_timer(sess); | |
4222 | spin_unlock_bh(&se_tpg->session_lock); | |
4223 | ||
4224 | /* | |
4225 | * transport_deregister_session_configfs() will clear the | |
4226 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4227 | * can be setting it again with __transport_register_session() in | |
4228 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4229 | * completes in iscsi_np context. | |
4230 | */ | |
4231 | transport_deregister_session_configfs(sess->se_sess); | |
4232 | ||
4233 | /* | |
4234 | * If any other processes are accessing this session pointer we must | |
4235 | * wait until they have completed. If we are in an interrupt (the | |
4236 | * time2retain handler) and contain and active session usage count we | |
4237 | * restart the timer and exit. | |
4238 | */ | |
4239 | if (!in_interrupt()) { | |
4240 | if (iscsit_check_session_usage_count(sess) == 1) | |
4241 | iscsit_stop_session(sess, 1, 1); | |
4242 | } else { | |
4243 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4244 | atomic_set(&sess->session_logout, 0); | |
4245 | iscsit_start_time2retain_handler(sess); | |
4246 | return 0; | |
4247 | } | |
4248 | } | |
4249 | ||
4250 | transport_deregister_session(sess->se_sess); | |
4251 | ||
4252 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4253 | iscsit_free_connection_recovery_entires(sess); | |
4254 | ||
4255 | iscsit_free_all_ooo_cmdsns(sess); | |
4256 | ||
4257 | spin_lock_bh(&se_tpg->session_lock); | |
4258 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4259 | sess->session_state = TARG_SESS_STATE_FREE; | |
4260 | pr_debug("Released iSCSI session from node: %s\n", | |
4261 | sess->sess_ops->InitiatorName); | |
4262 | tpg->nsessions--; | |
4263 | if (tpg->tpg_tiqn) | |
4264 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4265 | ||
4266 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4267 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4268 | ||
4269 | spin_lock(&sess_idr_lock); | |
4270 | idr_remove(&sess_idr, sess->session_index); | |
4271 | spin_unlock(&sess_idr_lock); | |
4272 | ||
4273 | kfree(sess->sess_ops); | |
4274 | sess->sess_ops = NULL; | |
4275 | spin_unlock_bh(&se_tpg->session_lock); | |
4276 | ||
4277 | kfree(sess); | |
4278 | return 0; | |
4279 | } | |
4280 | ||
4281 | static void iscsit_logout_post_handler_closesession( | |
4282 | struct iscsi_conn *conn) | |
4283 | { | |
4284 | struct iscsi_session *sess = conn->sess; | |
4285 | ||
4286 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4287 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4288 | ||
4289 | atomic_set(&conn->conn_logout_remove, 0); | |
4290 | complete(&conn->conn_logout_comp); | |
4291 | ||
4292 | iscsit_dec_conn_usage_count(conn); | |
4293 | iscsit_stop_session(sess, 1, 1); | |
4294 | iscsit_dec_session_usage_count(sess); | |
4295 | iscsit_close_session(sess); | |
4296 | } | |
4297 | ||
4298 | static void iscsit_logout_post_handler_samecid( | |
4299 | struct iscsi_conn *conn) | |
4300 | { | |
4301 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4302 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4303 | ||
4304 | atomic_set(&conn->conn_logout_remove, 0); | |
4305 | complete(&conn->conn_logout_comp); | |
4306 | ||
4307 | iscsit_cause_connection_reinstatement(conn, 1); | |
4308 | iscsit_dec_conn_usage_count(conn); | |
4309 | } | |
4310 | ||
4311 | static void iscsit_logout_post_handler_diffcid( | |
4312 | struct iscsi_conn *conn, | |
4313 | u16 cid) | |
4314 | { | |
4315 | struct iscsi_conn *l_conn; | |
4316 | struct iscsi_session *sess = conn->sess; | |
4317 | ||
4318 | if (!sess) | |
4319 | return; | |
4320 | ||
4321 | spin_lock_bh(&sess->conn_lock); | |
4322 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4323 | if (l_conn->cid == cid) { | |
4324 | iscsit_inc_conn_usage_count(l_conn); | |
4325 | break; | |
4326 | } | |
4327 | } | |
4328 | spin_unlock_bh(&sess->conn_lock); | |
4329 | ||
4330 | if (!l_conn) | |
4331 | return; | |
4332 | ||
4333 | if (l_conn->sock) | |
4334 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4335 | ||
4336 | spin_lock_bh(&l_conn->state_lock); | |
4337 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4338 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4339 | spin_unlock_bh(&l_conn->state_lock); | |
4340 | ||
4341 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4342 | iscsit_dec_conn_usage_count(l_conn); | |
4343 | } | |
4344 | ||
4345 | /* | |
4346 | * Return of 0 causes the TX thread to restart. | |
4347 | */ | |
4348 | static int iscsit_logout_post_handler( | |
4349 | struct iscsi_cmd *cmd, | |
4350 | struct iscsi_conn *conn) | |
4351 | { | |
4352 | int ret = 0; | |
4353 | ||
4354 | switch (cmd->logout_reason) { | |
4355 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4356 | switch (cmd->logout_response) { | |
4357 | case ISCSI_LOGOUT_SUCCESS: | |
4358 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4359 | default: | |
4360 | iscsit_logout_post_handler_closesession(conn); | |
4361 | break; | |
4362 | } | |
4363 | ret = 0; | |
4364 | break; | |
4365 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4366 | if (conn->cid == cmd->logout_cid) { | |
4367 | switch (cmd->logout_response) { | |
4368 | case ISCSI_LOGOUT_SUCCESS: | |
4369 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4370 | default: | |
4371 | iscsit_logout_post_handler_samecid(conn); | |
4372 | break; | |
4373 | } | |
4374 | ret = 0; | |
4375 | } else { | |
4376 | switch (cmd->logout_response) { | |
4377 | case ISCSI_LOGOUT_SUCCESS: | |
4378 | iscsit_logout_post_handler_diffcid(conn, | |
4379 | cmd->logout_cid); | |
4380 | break; | |
4381 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4382 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4383 | default: | |
4384 | break; | |
4385 | } | |
4386 | ret = 1; | |
4387 | } | |
4388 | break; | |
4389 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4390 | switch (cmd->logout_response) { | |
4391 | case ISCSI_LOGOUT_SUCCESS: | |
4392 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4393 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4394 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4395 | default: | |
4396 | break; | |
4397 | } | |
4398 | ret = 1; | |
4399 | break; | |
4400 | default: | |
4401 | break; | |
4402 | ||
4403 | } | |
4404 | return ret; | |
4405 | } | |
4406 | ||
4407 | void iscsit_fail_session(struct iscsi_session *sess) | |
4408 | { | |
4409 | struct iscsi_conn *conn; | |
4410 | ||
4411 | spin_lock_bh(&sess->conn_lock); | |
4412 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4413 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4414 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4415 | } | |
4416 | spin_unlock_bh(&sess->conn_lock); | |
4417 | ||
4418 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4419 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4420 | } | |
4421 | ||
4422 | int iscsit_free_session(struct iscsi_session *sess) | |
4423 | { | |
4424 | u16 conn_count = atomic_read(&sess->nconn); | |
4425 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4426 | int is_last; | |
4427 | ||
4428 | spin_lock_bh(&sess->conn_lock); | |
4429 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4430 | ||
4431 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4432 | conn_list) { | |
4433 | if (conn_count == 0) | |
4434 | break; | |
4435 | ||
4436 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4437 | is_last = 1; | |
4438 | } else { | |
4439 | iscsit_inc_conn_usage_count(conn_tmp); | |
4440 | is_last = 0; | |
4441 | } | |
4442 | iscsit_inc_conn_usage_count(conn); | |
4443 | ||
4444 | spin_unlock_bh(&sess->conn_lock); | |
4445 | iscsit_cause_connection_reinstatement(conn, 1); | |
4446 | spin_lock_bh(&sess->conn_lock); | |
4447 | ||
4448 | iscsit_dec_conn_usage_count(conn); | |
4449 | if (is_last == 0) | |
4450 | iscsit_dec_conn_usage_count(conn_tmp); | |
4451 | ||
4452 | conn_count--; | |
4453 | } | |
4454 | ||
4455 | if (atomic_read(&sess->nconn)) { | |
4456 | spin_unlock_bh(&sess->conn_lock); | |
4457 | wait_for_completion(&sess->session_wait_comp); | |
4458 | } else | |
4459 | spin_unlock_bh(&sess->conn_lock); | |
4460 | ||
4461 | iscsit_close_session(sess); | |
4462 | return 0; | |
4463 | } | |
4464 | ||
4465 | void iscsit_stop_session( | |
4466 | struct iscsi_session *sess, | |
4467 | int session_sleep, | |
4468 | int connection_sleep) | |
4469 | { | |
4470 | u16 conn_count = atomic_read(&sess->nconn); | |
4471 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4472 | int is_last; | |
4473 | ||
4474 | spin_lock_bh(&sess->conn_lock); | |
4475 | if (session_sleep) | |
4476 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4477 | ||
4478 | if (connection_sleep) { | |
4479 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4480 | conn_list) { | |
4481 | if (conn_count == 0) | |
4482 | break; | |
4483 | ||
4484 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4485 | is_last = 1; | |
4486 | } else { | |
4487 | iscsit_inc_conn_usage_count(conn_tmp); | |
4488 | is_last = 0; | |
4489 | } | |
4490 | iscsit_inc_conn_usage_count(conn); | |
4491 | ||
4492 | spin_unlock_bh(&sess->conn_lock); | |
4493 | iscsit_cause_connection_reinstatement(conn, 1); | |
4494 | spin_lock_bh(&sess->conn_lock); | |
4495 | ||
4496 | iscsit_dec_conn_usage_count(conn); | |
4497 | if (is_last == 0) | |
4498 | iscsit_dec_conn_usage_count(conn_tmp); | |
4499 | conn_count--; | |
4500 | } | |
4501 | } else { | |
4502 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4503 | iscsit_cause_connection_reinstatement(conn, 0); | |
4504 | } | |
4505 | ||
4506 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4507 | spin_unlock_bh(&sess->conn_lock); | |
4508 | wait_for_completion(&sess->session_wait_comp); | |
4509 | } else | |
4510 | spin_unlock_bh(&sess->conn_lock); | |
4511 | } | |
4512 | ||
4513 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4514 | { | |
4515 | struct iscsi_session *sess; | |
4516 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4517 | struct se_session *se_sess, *se_sess_tmp; | |
4518 | int session_count = 0; | |
4519 | ||
4520 | spin_lock_bh(&se_tpg->session_lock); | |
4521 | if (tpg->nsessions && !force) { | |
4522 | spin_unlock_bh(&se_tpg->session_lock); | |
4523 | return -1; | |
4524 | } | |
4525 | ||
4526 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4527 | sess_list) { | |
4528 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4529 | ||
4530 | spin_lock(&sess->conn_lock); | |
4531 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4532 | atomic_read(&sess->session_logout) || | |
4533 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4534 | spin_unlock(&sess->conn_lock); | |
4535 | continue; | |
4536 | } | |
4537 | atomic_set(&sess->session_reinstatement, 1); | |
4538 | spin_unlock(&sess->conn_lock); | |
4539 | spin_unlock_bh(&se_tpg->session_lock); | |
4540 | ||
4541 | iscsit_free_session(sess); | |
4542 | spin_lock_bh(&se_tpg->session_lock); | |
4543 | ||
4544 | session_count++; | |
4545 | } | |
4546 | spin_unlock_bh(&se_tpg->session_lock); | |
4547 | ||
4548 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4549 | " Group: %hu\n", session_count, tpg->tpgt); | |
4550 | return 0; | |
4551 | } | |
4552 | ||
4553 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4554 | MODULE_VERSION("4.1.x"); | |
4555 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4556 | MODULE_LICENSE("GPL"); | |
4557 | ||
4558 | module_init(iscsi_target_init_module); | |
4559 | module_exit(iscsi_target_cleanup_module); |