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