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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains main functions related to the iSCSI Target Core Driver. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
5 | * |
6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ******************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/crypto.h> | |
22 | #include <linux/completion.h> | |
827509e3 | 23 | #include <linux/module.h> |
40401530 | 24 | #include <linux/idr.h> |
e48354ce NB |
25 | #include <asm/unaligned.h> |
26 | #include <scsi/scsi_device.h> | |
27 | #include <scsi/iscsi_proto.h> | |
d28b1169 | 28 | #include <scsi/scsi_tcq.h> |
e48354ce | 29 | #include <target/target_core_base.h> |
c4795fb2 | 30 | #include <target/target_core_fabric.h> |
d28b1169 | 31 | #include <target/target_core_configfs.h> |
e48354ce NB |
32 | |
33 | #include "iscsi_target_core.h" | |
34 | #include "iscsi_target_parameters.h" | |
35 | #include "iscsi_target_seq_pdu_list.h" | |
36 | #include "iscsi_target_tq.h" | |
37 | #include "iscsi_target_configfs.h" | |
38 | #include "iscsi_target_datain_values.h" | |
39 | #include "iscsi_target_erl0.h" | |
40 | #include "iscsi_target_erl1.h" | |
41 | #include "iscsi_target_erl2.h" | |
42 | #include "iscsi_target_login.h" | |
43 | #include "iscsi_target_tmr.h" | |
44 | #include "iscsi_target_tpg.h" | |
45 | #include "iscsi_target_util.h" | |
46 | #include "iscsi_target.h" | |
47 | #include "iscsi_target_device.h" | |
48 | #include "iscsi_target_stat.h" | |
49 | ||
baa4d64b NB |
50 | #include <target/iscsi/iscsi_transport.h> |
51 | ||
e48354ce NB |
52 | static LIST_HEAD(g_tiqn_list); |
53 | static LIST_HEAD(g_np_list); | |
54 | static DEFINE_SPINLOCK(tiqn_lock); | |
ee291e63 | 55 | static DEFINE_MUTEX(np_lock); |
e48354ce NB |
56 | |
57 | static struct idr tiqn_idr; | |
58 | struct idr sess_idr; | |
59 | struct mutex auth_id_lock; | |
60 | spinlock_t sess_idr_lock; | |
61 | ||
62 | struct iscsit_global *iscsit_global; | |
63 | ||
e48354ce NB |
64 | struct kmem_cache *lio_qr_cache; |
65 | struct kmem_cache *lio_dr_cache; | |
66 | struct kmem_cache *lio_ooo_cache; | |
67 | struct kmem_cache *lio_r2t_cache; | |
68 | ||
69 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
2ec5a8c1 | 70 | struct iscsi_scsi_req *, u32); |
e48354ce NB |
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 | ||
e48354ce NB |
145 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; |
146 | ||
c9365bd0 | 147 | idr_preload(GFP_KERNEL); |
e48354ce | 148 | spin_lock(&tiqn_lock); |
c9365bd0 TH |
149 | |
150 | ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); | |
e48354ce | 151 | if (ret < 0) { |
c9365bd0 | 152 | pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); |
e48354ce | 153 | spin_unlock(&tiqn_lock); |
c9365bd0 | 154 | idr_preload_end(); |
e48354ce NB |
155 | kfree(tiqn); |
156 | return ERR_PTR(ret); | |
157 | } | |
c9365bd0 | 158 | tiqn->tiqn_index = ret; |
e48354ce | 159 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); |
c9365bd0 | 160 | |
e48354ce | 161 | spin_unlock(&tiqn_lock); |
c9365bd0 | 162 | idr_preload_end(); |
e48354ce NB |
163 | |
164 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
165 | ||
166 | return tiqn; | |
167 | ||
168 | } | |
169 | ||
170 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
171 | { | |
172 | /* | |
173 | * Wait for accesses to said struct iscsi_tiqn to end. | |
174 | */ | |
175 | spin_lock(&tiqn->tiqn_state_lock); | |
176 | while (tiqn->tiqn_access_count != 0) { | |
177 | spin_unlock(&tiqn->tiqn_state_lock); | |
178 | msleep(10); | |
179 | spin_lock(&tiqn->tiqn_state_lock); | |
180 | } | |
181 | spin_unlock(&tiqn->tiqn_state_lock); | |
182 | } | |
183 | ||
184 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
185 | { | |
186 | /* | |
187 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
188 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
189 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
190 | * fabric and control code paths. | |
191 | */ | |
192 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
193 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
194 | return; | |
195 | } | |
196 | ||
197 | iscsit_wait_for_tiqn(tiqn); | |
198 | ||
199 | spin_lock(&tiqn_lock); | |
200 | list_del(&tiqn->tiqn_list); | |
201 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
202 | spin_unlock(&tiqn_lock); | |
203 | ||
204 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
205 | tiqn->tiqn); | |
206 | kfree(tiqn); | |
207 | } | |
208 | ||
209 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
210 | { | |
211 | int ret; | |
212 | /* | |
213 | * Determine if the network portal is accepting storage traffic. | |
214 | */ | |
215 | spin_lock_bh(&np->np_thread_lock); | |
216 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
217 | spin_unlock_bh(&np->np_thread_lock); | |
218 | return -1; | |
219 | } | |
e48354ce NB |
220 | spin_unlock_bh(&np->np_thread_lock); |
221 | /* | |
222 | * Determine if the portal group is accepting storage traffic. | |
223 | */ | |
224 | spin_lock_bh(&tpg->tpg_state_lock); | |
225 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
226 | spin_unlock_bh(&tpg->tpg_state_lock); | |
227 | return -1; | |
228 | } | |
229 | spin_unlock_bh(&tpg->tpg_state_lock); | |
230 | ||
231 | /* | |
232 | * Here we serialize access across the TIQN+TPG Tuple. | |
233 | */ | |
a91eb7d9 | 234 | ret = down_interruptible(&tpg->np_login_sem); |
e48354ce NB |
235 | if ((ret != 0) || signal_pending(current)) |
236 | return -1; | |
237 | ||
a91eb7d9 NB |
238 | spin_lock_bh(&tpg->tpg_state_lock); |
239 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
240 | spin_unlock_bh(&tpg->tpg_state_lock); | |
241 | up(&tpg->np_login_sem); | |
242 | return -1; | |
243 | } | |
244 | spin_unlock_bh(&tpg->tpg_state_lock); | |
e48354ce NB |
245 | |
246 | return 0; | |
247 | } | |
248 | ||
a91eb7d9 NB |
249 | void iscsit_login_kref_put(struct kref *kref) |
250 | { | |
251 | struct iscsi_tpg_np *tpg_np = container_of(kref, | |
252 | struct iscsi_tpg_np, tpg_np_kref); | |
253 | ||
254 | complete(&tpg_np->tpg_np_comp); | |
255 | } | |
256 | ||
257 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg, | |
258 | struct iscsi_tpg_np *tpg_np) | |
e48354ce NB |
259 | { |
260 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
261 | ||
a91eb7d9 | 262 | up(&tpg->np_login_sem); |
e48354ce | 263 | |
a91eb7d9 NB |
264 | if (tpg_np) |
265 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
e48354ce NB |
266 | |
267 | if (tiqn) | |
268 | iscsit_put_tiqn_for_login(tiqn); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
05b96892 | 273 | bool iscsit_check_np_match( |
e48354ce | 274 | struct __kernel_sockaddr_storage *sockaddr, |
05b96892 | 275 | struct iscsi_np *np, |
e48354ce NB |
276 | int network_transport) |
277 | { | |
278 | struct sockaddr_in *sock_in, *sock_in_e; | |
279 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
05b96892 | 280 | bool ip_match = false; |
e48354ce NB |
281 | u16 port; |
282 | ||
05b96892 NB |
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(&sock_in6->sin6_addr.in6_u, | |
288 | &sock_in6_e->sin6_addr.in6_u, | |
289 | sizeof(struct in6_addr))) | |
290 | ip_match = true; | |
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 == sock_in_e->sin_addr.s_addr) | |
298 | ip_match = true; | |
299 | ||
300 | port = ntohs(sock_in->sin_port); | |
301 | } | |
302 | ||
0bcc297e | 303 | if (ip_match && (np->np_port == port) && |
05b96892 NB |
304 | (np->np_network_transport == network_transport)) |
305 | return true; | |
306 | ||
307 | return false; | |
308 | } | |
309 | ||
ee291e63 AG |
310 | /* |
311 | * Called with mutex np_lock held | |
312 | */ | |
05b96892 NB |
313 | static struct iscsi_np *iscsit_get_np( |
314 | struct __kernel_sockaddr_storage *sockaddr, | |
315 | int network_transport) | |
316 | { | |
317 | struct iscsi_np *np; | |
318 | bool match; | |
319 | ||
e48354ce | 320 | list_for_each_entry(np, &g_np_list, np_list) { |
ee291e63 | 321 | spin_lock_bh(&np->np_thread_lock); |
e48354ce | 322 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { |
ee291e63 | 323 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
324 | continue; |
325 | } | |
326 | ||
05b96892 | 327 | match = iscsit_check_np_match(sockaddr, np, network_transport); |
0bcc297e | 328 | if (match) { |
e48354ce NB |
329 | /* |
330 | * Increment the np_exports reference count now to | |
331 | * prevent iscsit_del_np() below from being called | |
332 | * while iscsi_tpg_add_network_portal() is called. | |
333 | */ | |
334 | np->np_exports++; | |
ee291e63 | 335 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
336 | return np; |
337 | } | |
ee291e63 | 338 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce | 339 | } |
e48354ce NB |
340 | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | struct iscsi_np *iscsit_add_np( | |
345 | struct __kernel_sockaddr_storage *sockaddr, | |
346 | char *ip_str, | |
347 | int network_transport) | |
348 | { | |
349 | struct sockaddr_in *sock_in; | |
350 | struct sockaddr_in6 *sock_in6; | |
351 | struct iscsi_np *np; | |
352 | int ret; | |
ee291e63 AG |
353 | |
354 | mutex_lock(&np_lock); | |
355 | ||
e48354ce NB |
356 | /* |
357 | * Locate the existing struct iscsi_np if already active.. | |
358 | */ | |
359 | np = iscsit_get_np(sockaddr, network_transport); | |
ee291e63 AG |
360 | if (np) { |
361 | mutex_unlock(&np_lock); | |
e48354ce | 362 | return np; |
ee291e63 | 363 | } |
e48354ce NB |
364 | |
365 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
366 | if (!np) { | |
367 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
ee291e63 | 368 | mutex_unlock(&np_lock); |
e48354ce NB |
369 | return ERR_PTR(-ENOMEM); |
370 | } | |
371 | ||
372 | np->np_flags |= NPF_IP_NETWORK; | |
373 | if (sockaddr->ss_family == AF_INET6) { | |
374 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
375 | snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); | |
376 | np->np_port = ntohs(sock_in6->sin6_port); | |
377 | } else { | |
378 | sock_in = (struct sockaddr_in *)sockaddr; | |
379 | sprintf(np->np_ip, "%s", ip_str); | |
380 | np->np_port = ntohs(sock_in->sin_port); | |
381 | } | |
382 | ||
383 | np->np_network_transport = network_transport; | |
384 | spin_lock_init(&np->np_thread_lock); | |
385 | init_completion(&np->np_restart_comp); | |
386 | INIT_LIST_HEAD(&np->np_list); | |
387 | ||
388 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
389 | if (ret != 0) { | |
390 | kfree(np); | |
ee291e63 | 391 | mutex_unlock(&np_lock); |
e48354ce NB |
392 | return ERR_PTR(ret); |
393 | } | |
394 | ||
395 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
396 | if (IS_ERR(np->np_thread)) { | |
397 | pr_err("Unable to create kthread: iscsi_np\n"); | |
398 | ret = PTR_ERR(np->np_thread); | |
399 | kfree(np); | |
ee291e63 | 400 | mutex_unlock(&np_lock); |
e48354ce NB |
401 | return ERR_PTR(ret); |
402 | } | |
403 | /* | |
404 | * Increment the np_exports reference count now to prevent | |
405 | * iscsit_del_np() below from being run while a new call to | |
406 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
407 | * active. We don't need to hold np->np_thread_lock at this | |
408 | * point because iscsi_np has not been added to g_np_list yet. | |
409 | */ | |
410 | np->np_exports = 1; | |
ee291e63 | 411 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
e48354ce | 412 | |
e48354ce | 413 | list_add_tail(&np->np_list, &g_np_list); |
ee291e63 | 414 | mutex_unlock(&np_lock); |
e48354ce NB |
415 | |
416 | pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", | |
baa4d64b | 417 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce NB |
418 | |
419 | return np; | |
420 | } | |
421 | ||
422 | int iscsit_reset_np_thread( | |
423 | struct iscsi_np *np, | |
424 | struct iscsi_tpg_np *tpg_np, | |
a91eb7d9 NB |
425 | struct iscsi_portal_group *tpg, |
426 | bool shutdown) | |
e48354ce NB |
427 | { |
428 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
429 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { |
430 | spin_unlock_bh(&np->np_thread_lock); | |
431 | return 0; | |
432 | } | |
433 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
434 | ||
435 | if (np->np_thread) { | |
436 | spin_unlock_bh(&np->np_thread_lock); | |
437 | send_sig(SIGINT, np->np_thread, 1); | |
438 | wait_for_completion(&np->np_restart_comp); | |
439 | spin_lock_bh(&np->np_thread_lock); | |
440 | } | |
441 | spin_unlock_bh(&np->np_thread_lock); | |
442 | ||
a91eb7d9 NB |
443 | if (tpg_np && shutdown) { |
444 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
445 | ||
446 | wait_for_completion(&tpg_np->tpg_np_comp); | |
447 | } | |
448 | ||
e48354ce NB |
449 | return 0; |
450 | } | |
451 | ||
baa4d64b | 452 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 453 | { |
bf6932f4 AV |
454 | if (np->np_socket) |
455 | sock_release(np->np_socket); | |
e48354ce NB |
456 | } |
457 | ||
458 | int iscsit_del_np(struct iscsi_np *np) | |
459 | { | |
460 | spin_lock_bh(&np->np_thread_lock); | |
461 | np->np_exports--; | |
462 | if (np->np_exports) { | |
2363d196 | 463 | np->enabled = true; |
e48354ce NB |
464 | spin_unlock_bh(&np->np_thread_lock); |
465 | return 0; | |
466 | } | |
467 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
468 | spin_unlock_bh(&np->np_thread_lock); | |
469 | ||
470 | if (np->np_thread) { | |
471 | /* | |
472 | * We need to send the signal to wakeup Linux/Net | |
473 | * which may be sleeping in sock_accept().. | |
474 | */ | |
475 | send_sig(SIGINT, np->np_thread, 1); | |
476 | kthread_stop(np->np_thread); | |
db6077fd | 477 | np->np_thread = NULL; |
e48354ce | 478 | } |
baa4d64b NB |
479 | |
480 | np->np_transport->iscsit_free_np(np); | |
e48354ce | 481 | |
ee291e63 | 482 | mutex_lock(&np_lock); |
e48354ce | 483 | list_del(&np->np_list); |
ee291e63 | 484 | mutex_unlock(&np_lock); |
e48354ce NB |
485 | |
486 | pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", | |
baa4d64b | 487 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce | 488 | |
baa4d64b | 489 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
490 | kfree(np); |
491 | return 0; | |
492 | } | |
493 | ||
2ec5a8c1 NB |
494 | static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int); |
495 | static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int); | |
496 | ||
497 | static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
498 | { | |
499 | iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); | |
500 | return 0; | |
501 | } | |
502 | ||
131e6abc NB |
503 | static void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
504 | { | |
505 | bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD); | |
506 | ||
507 | spin_lock_bh(&conn->cmd_lock); | |
508 | if (!list_empty(&cmd->i_conn_node)) | |
509 | list_del_init(&cmd->i_conn_node); | |
510 | spin_unlock_bh(&conn->cmd_lock); | |
511 | ||
512 | __iscsit_free_cmd(cmd, scsi_cmd, true); | |
513 | } | |
514 | ||
e70beee7 NB |
515 | static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn) |
516 | { | |
517 | return TARGET_PROT_NORMAL; | |
518 | } | |
519 | ||
baa4d64b NB |
520 | static struct iscsit_transport iscsi_target_transport = { |
521 | .name = "iSCSI/TCP", | |
522 | .transport_type = ISCSI_TCP, | |
523 | .owner = NULL, | |
524 | .iscsit_setup_np = iscsit_setup_np, | |
525 | .iscsit_accept_np = iscsit_accept_np, | |
526 | .iscsit_free_np = iscsit_free_np, | |
527 | .iscsit_get_login_rx = iscsit_get_login_rx, | |
528 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 529 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
530 | .iscsit_immediate_queue = iscsit_immediate_queue, |
531 | .iscsit_response_queue = iscsit_response_queue, | |
532 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
533 | .iscsit_queue_status = iscsit_queue_rsp, | |
131e6abc | 534 | .iscsit_aborted_task = iscsit_aborted_task, |
e70beee7 | 535 | .iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops, |
baa4d64b NB |
536 | }; |
537 | ||
e48354ce NB |
538 | static int __init iscsi_target_init_module(void) |
539 | { | |
540 | int ret = 0; | |
541 | ||
542 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
543 | ||
544 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
545 | if (!iscsit_global) { | |
546 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
547 | return -1; | |
548 | } | |
549 | mutex_init(&auth_id_lock); | |
550 | spin_lock_init(&sess_idr_lock); | |
551 | idr_init(&tiqn_idr); | |
552 | idr_init(&sess_idr); | |
553 | ||
554 | ret = iscsi_target_register_configfs(); | |
555 | if (ret < 0) | |
556 | goto out; | |
557 | ||
558 | ret = iscsi_thread_set_init(); | |
559 | if (ret < 0) | |
560 | goto configfs_out; | |
561 | ||
562 | if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != | |
563 | TARGET_THREAD_SET_COUNT) { | |
564 | pr_err("iscsi_allocate_thread_sets() returned" | |
565 | " unexpected value!\n"); | |
566 | goto ts_out1; | |
567 | } | |
568 | ||
e48354ce NB |
569 | lio_qr_cache = kmem_cache_create("lio_qr_cache", |
570 | sizeof(struct iscsi_queue_req), | |
571 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
572 | if (!lio_qr_cache) { | |
573 | pr_err("nable to kmem_cache_create() for" | |
574 | " lio_qr_cache\n"); | |
d703ce2f | 575 | goto ts_out2; |
e48354ce NB |
576 | } |
577 | ||
578 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
579 | sizeof(struct iscsi_datain_req), | |
580 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
581 | if (!lio_dr_cache) { | |
582 | pr_err("Unable to kmem_cache_create() for" | |
583 | " lio_dr_cache\n"); | |
584 | goto qr_out; | |
585 | } | |
586 | ||
587 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
588 | sizeof(struct iscsi_ooo_cmdsn), | |
589 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
590 | if (!lio_ooo_cache) { | |
591 | pr_err("Unable to kmem_cache_create() for" | |
592 | " lio_ooo_cache\n"); | |
593 | goto dr_out; | |
594 | } | |
595 | ||
596 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
597 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
598 | 0, NULL); | |
599 | if (!lio_r2t_cache) { | |
600 | pr_err("Unable to kmem_cache_create() for" | |
601 | " lio_r2t_cache\n"); | |
602 | goto ooo_out; | |
603 | } | |
604 | ||
baa4d64b NB |
605 | iscsit_register_transport(&iscsi_target_transport); |
606 | ||
e48354ce NB |
607 | if (iscsit_load_discovery_tpg() < 0) |
608 | goto r2t_out; | |
609 | ||
610 | return ret; | |
611 | r2t_out: | |
612 | kmem_cache_destroy(lio_r2t_cache); | |
613 | ooo_out: | |
614 | kmem_cache_destroy(lio_ooo_cache); | |
615 | dr_out: | |
616 | kmem_cache_destroy(lio_dr_cache); | |
617 | qr_out: | |
618 | kmem_cache_destroy(lio_qr_cache); | |
e48354ce NB |
619 | ts_out2: |
620 | iscsi_deallocate_thread_sets(); | |
621 | ts_out1: | |
622 | iscsi_thread_set_free(); | |
623 | configfs_out: | |
624 | iscsi_target_deregister_configfs(); | |
625 | out: | |
626 | kfree(iscsit_global); | |
627 | return -ENOMEM; | |
628 | } | |
629 | ||
630 | static void __exit iscsi_target_cleanup_module(void) | |
631 | { | |
632 | iscsi_deallocate_thread_sets(); | |
633 | iscsi_thread_set_free(); | |
634 | iscsit_release_discovery_tpg(); | |
baa4d64b | 635 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
636 | kmem_cache_destroy(lio_qr_cache); |
637 | kmem_cache_destroy(lio_dr_cache); | |
638 | kmem_cache_destroy(lio_ooo_cache); | |
639 | kmem_cache_destroy(lio_r2t_cache); | |
640 | ||
641 | iscsi_target_deregister_configfs(); | |
642 | ||
643 | kfree(iscsit_global); | |
644 | } | |
645 | ||
8b1e1244 | 646 | static int iscsit_add_reject( |
ba159914 | 647 | struct iscsi_conn *conn, |
e48354ce | 648 | u8 reason, |
ba159914 | 649 | unsigned char *buf) |
e48354ce NB |
650 | { |
651 | struct iscsi_cmd *cmd; | |
e48354ce | 652 | |
676687c6 | 653 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
e48354ce NB |
654 | if (!cmd) |
655 | return -1; | |
656 | ||
657 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 658 | cmd->reject_reason = reason; |
e48354ce | 659 | |
1c3d5794 | 660 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
661 | if (!cmd->buf_ptr) { |
662 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 663 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
664 | return -1; |
665 | } | |
e48354ce NB |
666 | |
667 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 668 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
669 | spin_unlock_bh(&conn->cmd_lock); |
670 | ||
671 | cmd->i_state = ISTATE_SEND_REJECT; | |
672 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
673 | ||
ba159914 | 674 | return -1; |
e48354ce NB |
675 | } |
676 | ||
ba159914 NB |
677 | static int iscsit_add_reject_from_cmd( |
678 | struct iscsi_cmd *cmd, | |
e48354ce | 679 | u8 reason, |
ba159914 NB |
680 | bool add_to_conn, |
681 | unsigned char *buf) | |
e48354ce NB |
682 | { |
683 | struct iscsi_conn *conn; | |
e48354ce NB |
684 | |
685 | if (!cmd->conn) { | |
686 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
687 | cmd->init_task_tag); | |
688 | return -1; | |
689 | } | |
690 | conn = cmd->conn; | |
691 | ||
692 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 693 | cmd->reject_reason = reason; |
e48354ce | 694 | |
1c3d5794 | 695 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
696 | if (!cmd->buf_ptr) { |
697 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 698 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
699 | return -1; |
700 | } | |
e48354ce NB |
701 | |
702 | if (add_to_conn) { | |
703 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 704 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
705 | spin_unlock_bh(&conn->cmd_lock); |
706 | } | |
707 | ||
708 | cmd->i_state = ISTATE_SEND_REJECT; | |
709 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
3e1c81a9 NB |
710 | /* |
711 | * Perform the kref_put now if se_cmd has already been setup by | |
712 | * scsit_setup_scsi_cmd() | |
713 | */ | |
714 | if (cmd->se_cmd.se_tfo != NULL) { | |
715 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); | |
716 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
717 | } | |
ba159914 NB |
718 | return -1; |
719 | } | |
e48354ce | 720 | |
ba159914 NB |
721 | static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, |
722 | unsigned char *buf) | |
723 | { | |
724 | return iscsit_add_reject_from_cmd(cmd, reason, true, buf); | |
725 | } | |
726 | ||
727 | int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) | |
728 | { | |
729 | return iscsit_add_reject_from_cmd(cmd, reason, false, buf); | |
e48354ce NB |
730 | } |
731 | ||
732 | /* | |
733 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 734 | * kernel sockets to copy data in/out. |
e48354ce NB |
735 | */ |
736 | static int iscsit_map_iovec( | |
737 | struct iscsi_cmd *cmd, | |
738 | struct kvec *iov, | |
739 | u32 data_offset, | |
740 | u32 data_length) | |
741 | { | |
742 | u32 i = 0; | |
743 | struct scatterlist *sg; | |
744 | unsigned int page_off; | |
745 | ||
746 | /* | |
bfb79eac | 747 | * We know each entry in t_data_sg contains a page. |
e48354ce | 748 | */ |
bfb79eac | 749 | sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; |
e48354ce NB |
750 | page_off = (data_offset % PAGE_SIZE); |
751 | ||
752 | cmd->first_data_sg = sg; | |
753 | cmd->first_data_sg_off = page_off; | |
754 | ||
755 | while (data_length) { | |
756 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
757 | ||
758 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
759 | iov[i].iov_len = cur_len; | |
760 | ||
761 | data_length -= cur_len; | |
762 | page_off = 0; | |
763 | sg = sg_next(sg); | |
764 | i++; | |
765 | } | |
766 | ||
767 | cmd->kmapped_nents = i; | |
768 | ||
769 | return i; | |
770 | } | |
771 | ||
772 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
773 | { | |
774 | u32 i; | |
775 | struct scatterlist *sg; | |
776 | ||
777 | sg = cmd->first_data_sg; | |
778 | ||
779 | for (i = 0; i < cmd->kmapped_nents; i++) | |
780 | kunmap(sg_page(&sg[i])); | |
781 | } | |
782 | ||
783 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
784 | { | |
f56cbbb4 NB |
785 | LIST_HEAD(ack_list); |
786 | struct iscsi_cmd *cmd, *cmd_p; | |
e48354ce NB |
787 | |
788 | conn->exp_statsn = exp_statsn; | |
789 | ||
3e1c81a9 NB |
790 | if (conn->sess->sess_ops->RDMAExtensions) |
791 | return; | |
792 | ||
e48354ce | 793 | spin_lock_bh(&conn->cmd_lock); |
f56cbbb4 | 794 | list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
795 | spin_lock(&cmd->istate_lock); |
796 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 797 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
798 | cmd->i_state = ISTATE_REMOVE; |
799 | spin_unlock(&cmd->istate_lock); | |
f56cbbb4 | 800 | list_move_tail(&cmd->i_conn_node, &ack_list); |
e48354ce NB |
801 | continue; |
802 | } | |
803 | spin_unlock(&cmd->istate_lock); | |
804 | } | |
805 | spin_unlock_bh(&conn->cmd_lock); | |
f56cbbb4 NB |
806 | |
807 | list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { | |
5159d763 | 808 | list_del_init(&cmd->i_conn_node); |
f56cbbb4 NB |
809 | iscsit_free_cmd(cmd, false); |
810 | } | |
e48354ce NB |
811 | } |
812 | ||
813 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
814 | { | |
f80e8ed3 | 815 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 816 | |
c0427f15 | 817 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
818 | |
819 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
820 | if (!cmd->iov_data) { | |
821 | pr_err("Unable to allocate cmd->iov_data\n"); | |
822 | return -ENOMEM; | |
823 | } | |
824 | ||
825 | cmd->orig_iov_data_count = iov_count; | |
826 | return 0; | |
827 | } | |
828 | ||
3e1c81a9 NB |
829 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
830 | unsigned char *buf) | |
e48354ce | 831 | { |
3e1c81a9 | 832 | int data_direction, payload_length; |
e48354ce | 833 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
834 | int iscsi_task_attr; |
835 | int sam_task_attr; | |
e48354ce | 836 | |
04f3b31b | 837 | atomic_long_inc(&conn->sess->cmd_pdus); |
e48354ce NB |
838 | |
839 | hdr = (struct iscsi_scsi_req *) buf; | |
840 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
841 | |
842 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
843 | ||
844 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
845 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
846 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
847 | " not set. Bad iSCSI Initiator.\n"); | |
ba159914 NB |
848 | return iscsit_add_reject_cmd(cmd, |
849 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
850 | } |
851 | ||
852 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
853 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
854 | /* | |
4454b66c NB |
855 | * From RFC-3720 Section 10.3.1: |
856 | * | |
857 | * "Either or both of R and W MAY be 1 when either the | |
858 | * Expected Data Transfer Length and/or Bidirectional Read | |
859 | * Expected Data Transfer Length are 0" | |
860 | * | |
861 | * For this case, go ahead and clear the unnecssary bits | |
862 | * to avoid any confusion with ->data_direction. | |
e48354ce | 863 | */ |
4454b66c NB |
864 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; |
865 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
e48354ce | 866 | |
4454b66c | 867 | pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" |
e48354ce | 868 | " set when Expected Data Transfer Length is 0 for" |
4454b66c | 869 | " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); |
e48354ce | 870 | } |
e48354ce NB |
871 | |
872 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
873 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
874 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
875 | " MUST be set if Expected Data Transfer Length is not 0." | |
876 | " Bad iSCSI Initiator\n"); | |
ba159914 NB |
877 | return iscsit_add_reject_cmd(cmd, |
878 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
879 | } |
880 | ||
881 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
882 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
883 | pr_err("Bidirectional operations not supported!\n"); | |
ba159914 NB |
884 | return iscsit_add_reject_cmd(cmd, |
885 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
886 | } |
887 | ||
888 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
889 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
890 | " Scsi Command PDU.\n"); | |
ba159914 NB |
891 | return iscsit_add_reject_cmd(cmd, |
892 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
893 | } |
894 | ||
895 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
896 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
897 | " protocol error.\n", payload_length); | |
ba159914 NB |
898 | return iscsit_add_reject_cmd(cmd, |
899 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
900 | } |
901 | ||
ba159914 | 902 | if ((be32_to_cpu(hdr->data_length) == payload_length) && |
e48354ce NB |
903 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
904 | pr_err("Expected Data Transfer Length and Length of" | |
905 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
906 | " bit is not set protocol error\n"); | |
ba159914 NB |
907 | return iscsit_add_reject_cmd(cmd, |
908 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
909 | } |
910 | ||
50e5c87d | 911 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
912 | pr_err("DataSegmentLength: %u is greater than" |
913 | " EDTL: %u, protocol error.\n", payload_length, | |
914 | hdr->data_length); | |
ba159914 NB |
915 | return iscsit_add_reject_cmd(cmd, |
916 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
917 | } |
918 | ||
21f5aa7e | 919 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 920 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
921 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
922 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
923 | return iscsit_add_reject_cmd(cmd, |
924 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
925 | } |
926 | ||
927 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
928 | pr_err("DataSegmentLength: %u is greater than" | |
929 | " FirstBurstLength: %u, protocol error.\n", | |
930 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
ba159914 NB |
931 | return iscsit_add_reject_cmd(cmd, |
932 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
933 | } |
934 | ||
935 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
936 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
937 | DMA_NONE; | |
938 | ||
d28b1169 | 939 | cmd->data_direction = data_direction; |
d28b1169 AG |
940 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
941 | /* | |
942 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
943 | */ | |
944 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
945 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
946 | sam_task_attr = MSG_SIMPLE_TAG; | |
947 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) | |
948 | sam_task_attr = MSG_ORDERED_TAG; | |
949 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) | |
950 | sam_task_attr = MSG_HEAD_TAG; | |
951 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) | |
952 | sam_task_attr = MSG_ACA_TAG; | |
953 | else { | |
954 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
955 | " MSG_SIMPLE_TAG\n", iscsi_task_attr); | |
956 | sam_task_attr = MSG_SIMPLE_TAG; | |
957 | } | |
958 | ||
e48354ce NB |
959 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
960 | cmd->i_state = ISTATE_NEW_CMD; | |
961 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
962 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
963 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
964 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
965 | if (cmd->unsolicited_data) | |
966 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
967 | ||
968 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
969 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { | |
970 | spin_lock_bh(&conn->sess->ttt_lock); | |
971 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
972 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
973 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
974 | spin_unlock_bh(&conn->sess->ttt_lock); | |
975 | } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) | |
976 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
977 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
978 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
979 | cmd->first_burst_len = payload_length; |
980 | ||
3e1c81a9 NB |
981 | if (!conn->sess->sess_ops->RDMAExtensions && |
982 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
983 | struct iscsi_datain_req *dr; |
984 | ||
985 | dr = iscsit_allocate_datain_req(); | |
986 | if (!dr) | |
ba159914 NB |
987 | return iscsit_add_reject_cmd(cmd, |
988 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
989 | |
990 | iscsit_attach_datain_req(cmd, dr); | |
991 | } | |
992 | ||
065ca1e4 AG |
993 | /* |
994 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
995 | */ | |
996 | transport_init_se_cmd(&cmd->se_cmd, &lio_target_fabric_configfs->tf_ops, | |
50e5c87d CH |
997 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
998 | cmd->data_direction, sam_task_attr, | |
999 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
1000 | |
1001 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
1002 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
1003 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
1004 | conn->cid); | |
1005 | ||
1006 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); | |
065ca1e4 | 1007 | |
de103c93 CH |
1008 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
1009 | scsilun_to_int(&hdr->lun)); | |
1010 | if (cmd->sense_reason) | |
1011 | goto attach_cmd; | |
1012 | ||
1013 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); | |
1014 | if (cmd->sense_reason) { | |
1015 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
ba159914 NB |
1016 | return iscsit_add_reject_cmd(cmd, |
1017 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce | 1018 | } |
de103c93 | 1019 | |
e48354ce NB |
1020 | goto attach_cmd; |
1021 | } | |
a12f41f8 | 1022 | |
de103c93 | 1023 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
ba159914 NB |
1024 | return iscsit_add_reject_cmd(cmd, |
1025 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1026 | } |
1027 | ||
1028 | attach_cmd: | |
1029 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1030 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1031 | spin_unlock_bh(&conn->cmd_lock); |
1032 | /* | |
1033 | * Check if we need to delay processing because of ALUA | |
1034 | * Active/NonOptimized primary access state.. | |
1035 | */ | |
1036 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1037 | |
3e1c81a9 NB |
1038 | return 0; |
1039 | } | |
1040 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1041 | |
3e1c81a9 NB |
1042 | void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) |
1043 | { | |
1044 | iscsit_set_dataout_sequence_values(cmd); | |
1045 | ||
1046 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1047 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1048 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1049 | } | |
1050 | EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); | |
1051 | ||
1052 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1053 | struct iscsi_scsi_req *hdr) | |
1054 | { | |
1055 | int cmdsn_ret = 0; | |
e48354ce NB |
1056 | /* |
1057 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1058 | * the Immediate Bit is not set, and no Immediate | |
1059 | * Data is attached. | |
1060 | * | |
1061 | * A PDU/CmdSN carrying Immediate Data can only | |
1062 | * be processed after the DataCRC has passed. | |
1063 | * If the DataCRC fails, the CmdSN MUST NOT | |
1064 | * be acknowledged. (See below) | |
1065 | */ | |
1066 | if (!cmd->immediate_data) { | |
561bf158 NB |
1067 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1068 | (unsigned char *)hdr, hdr->cmdsn); | |
1069 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1070 | return -1; | |
1071 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
3e1c81a9 | 1072 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
7e32da55 | 1073 | return 0; |
3e1c81a9 | 1074 | } |
e48354ce NB |
1075 | } |
1076 | ||
50e5c87d | 1077 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1078 | |
1079 | /* | |
1080 | * If no Immediate Data is attached, it's OK to return now. | |
1081 | */ | |
1082 | if (!cmd->immediate_data) { | |
3e1c81a9 NB |
1083 | if (!cmd->sense_reason && cmd->unsolicited_data) |
1084 | iscsit_set_unsoliticed_dataout(cmd); | |
1085 | if (!cmd->sense_reason) | |
1086 | return 0; | |
e48354ce | 1087 | |
3e1c81a9 | 1088 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
e48354ce NB |
1089 | return 0; |
1090 | } | |
1091 | ||
1092 | /* | |
3e1c81a9 NB |
1093 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1094 | * execution. These exceptions are processed in CmdSN order using | |
1095 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1096 | */ |
de103c93 | 1097 | if (cmd->sense_reason) { |
561bf158 NB |
1098 | if (cmd->reject_reason) |
1099 | return 0; | |
1100 | ||
3e1c81a9 | 1101 | return 1; |
e48354ce NB |
1102 | } |
1103 | /* | |
1104 | * Call directly into transport_generic_new_cmd() to perform | |
1105 | * the backend memory allocation. | |
1106 | */ | |
de103c93 | 1107 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
561bf158 | 1108 | if (cmd->sense_reason) |
3e1c81a9 | 1109 | return 1; |
e48354ce | 1110 | |
3e1c81a9 NB |
1111 | return 0; |
1112 | } | |
1113 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1114 | ||
1115 | static int | |
1116 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1117 | bool dump_payload) | |
1118 | { | |
561bf158 | 1119 | struct iscsi_conn *conn = cmd->conn; |
3e1c81a9 NB |
1120 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; |
1121 | /* | |
1122 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1123 | */ | |
0bcc297e | 1124 | if (dump_payload) |
3e1c81a9 NB |
1125 | goto after_immediate_data; |
1126 | ||
1127 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1128 | cmd->first_burst_len); | |
e48354ce NB |
1129 | after_immediate_data: |
1130 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1131 | /* | |
1132 | * A PDU/CmdSN carrying Immediate Data passed | |
1133 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1134 | * Immediate Bit is not set. | |
1135 | */ | |
561bf158 NB |
1136 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, |
1137 | (unsigned char *)hdr, hdr->cmdsn); | |
9d86a2be | 1138 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
561bf158 | 1139 | return -1; |
3e1c81a9 | 1140 | |
9d86a2be | 1141 | if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
561bf158 NB |
1142 | int rc; |
1143 | ||
1144 | rc = iscsit_dump_data_payload(cmd->conn, | |
1145 | cmd->first_burst_len, 1); | |
1146 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
1147 | return rc; | |
3e1c81a9 NB |
1148 | } else if (cmd->unsolicited_data) |
1149 | iscsit_set_unsoliticed_dataout(cmd); | |
e48354ce | 1150 | |
e48354ce NB |
1151 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { |
1152 | /* | |
1153 | * Immediate Data failed DataCRC and ERL>=1, | |
1154 | * silently drop this PDU and let the initiator | |
1155 | * plug the CmdSN gap. | |
1156 | * | |
1157 | * FIXME: Send Unsolicited NOPIN with reserved | |
1158 | * TTT here to help the initiator figure out | |
1159 | * the missing CmdSN, although they should be | |
1160 | * intelligent enough to determine the missing | |
1161 | * CmdSN and issue a retry to plug the sequence. | |
1162 | */ | |
1163 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1164 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1165 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1166 | return -1; | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
3e1c81a9 NB |
1171 | static int |
1172 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1173 | unsigned char *buf) | |
1174 | { | |
1175 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1176 | int rc, immed_data; | |
1177 | bool dump_payload = false; | |
1178 | ||
1179 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1180 | if (rc < 0) | |
561bf158 | 1181 | return 0; |
3e1c81a9 NB |
1182 | /* |
1183 | * Allocation iovecs needed for struct socket operations for | |
1184 | * traditional iSCSI block I/O. | |
1185 | */ | |
1186 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
ba159914 NB |
1187 | return iscsit_add_reject_cmd(cmd, |
1188 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
1189 | } |
1190 | immed_data = cmd->immediate_data; | |
1191 | ||
1192 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1193 | if (rc < 0) | |
1194 | return rc; | |
1195 | else if (rc > 0) | |
1196 | dump_payload = true; | |
1197 | ||
1198 | if (!immed_data) | |
1199 | return 0; | |
1200 | ||
1201 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1202 | } | |
1203 | ||
e48354ce NB |
1204 | static u32 iscsit_do_crypto_hash_sg( |
1205 | struct hash_desc *hash, | |
1206 | struct iscsi_cmd *cmd, | |
1207 | u32 data_offset, | |
1208 | u32 data_length, | |
1209 | u32 padding, | |
1210 | u8 *pad_bytes) | |
1211 | { | |
1212 | u32 data_crc; | |
1213 | u32 i; | |
1214 | struct scatterlist *sg; | |
1215 | unsigned int page_off; | |
1216 | ||
1217 | crypto_hash_init(hash); | |
1218 | ||
1219 | sg = cmd->first_data_sg; | |
1220 | page_off = cmd->first_data_sg_off; | |
1221 | ||
1222 | i = 0; | |
1223 | while (data_length) { | |
1224 | u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); | |
1225 | ||
1226 | crypto_hash_update(hash, &sg[i], cur_len); | |
1227 | ||
1228 | data_length -= cur_len; | |
1229 | page_off = 0; | |
1230 | i++; | |
1231 | } | |
1232 | ||
1233 | if (padding) { | |
1234 | struct scatterlist pad_sg; | |
1235 | ||
1236 | sg_init_one(&pad_sg, pad_bytes, padding); | |
1237 | crypto_hash_update(hash, &pad_sg, padding); | |
1238 | } | |
1239 | crypto_hash_final(hash, (u8 *) &data_crc); | |
1240 | ||
1241 | return data_crc; | |
1242 | } | |
1243 | ||
1244 | static void iscsit_do_crypto_hash_buf( | |
1245 | struct hash_desc *hash, | |
80690fdb | 1246 | const void *buf, |
e48354ce NB |
1247 | u32 payload_length, |
1248 | u32 padding, | |
1249 | u8 *pad_bytes, | |
1250 | u8 *data_crc) | |
1251 | { | |
1252 | struct scatterlist sg; | |
1253 | ||
1254 | crypto_hash_init(hash); | |
1255 | ||
8359cf43 | 1256 | sg_init_one(&sg, buf, payload_length); |
e48354ce NB |
1257 | crypto_hash_update(hash, &sg, payload_length); |
1258 | ||
1259 | if (padding) { | |
1260 | sg_init_one(&sg, pad_bytes, padding); | |
1261 | crypto_hash_update(hash, &sg, padding); | |
1262 | } | |
1263 | crypto_hash_final(hash, data_crc); | |
1264 | } | |
1265 | ||
3e1c81a9 NB |
1266 | int |
1267 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, | |
1268 | struct iscsi_cmd **out_cmd) | |
e48354ce | 1269 | { |
3e1c81a9 | 1270 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
e48354ce NB |
1271 | struct iscsi_cmd *cmd = NULL; |
1272 | struct se_cmd *se_cmd; | |
3e1c81a9 NB |
1273 | u32 payload_length = ntoh24(hdr->dlength); |
1274 | int rc; | |
e48354ce NB |
1275 | |
1276 | if (!payload_length) { | |
dbcbc95c NB |
1277 | pr_warn("DataOUT payload is ZERO, ignoring.\n"); |
1278 | return 0; | |
e48354ce NB |
1279 | } |
1280 | ||
1281 | /* iSCSI write */ | |
04f3b31b | 1282 | atomic_long_add(payload_length, &conn->sess->rx_data_octets); |
e48354ce | 1283 | |
21f5aa7e | 1284 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1285 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1286 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1287 | conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1288 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
1289 | buf); | |
e48354ce NB |
1290 | } |
1291 | ||
1292 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1293 | payload_length); | |
1294 | if (!cmd) | |
1295 | return 0; | |
1296 | ||
1297 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1298 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1299 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1300 | payload_length, conn->cid); |
1301 | ||
1302 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1303 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1304 | " last DataOUT received, dumping payload\n", | |
1305 | cmd->init_task_tag); | |
1306 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1307 | } | |
1308 | ||
1309 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1310 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1311 | " NON-WRITE command.\n", cmd->init_task_tag); | |
97c99b47 | 1312 | return iscsit_dump_data_payload(conn, payload_length, 1); |
e48354ce NB |
1313 | } |
1314 | se_cmd = &cmd->se_cmd; | |
1315 | iscsit_mod_dataout_timer(cmd); | |
1316 | ||
50e5c87d | 1317 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1318 | pr_err("DataOut Offset: %u, Length %u greater than" |
1319 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1320 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
ba159914 | 1321 | return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); |
e48354ce NB |
1322 | } |
1323 | ||
1324 | if (cmd->unsolicited_data) { | |
1325 | int dump_unsolicited_data = 0; | |
1326 | ||
1327 | if (conn->sess->sess_ops->InitialR2T) { | |
1328 | pr_err("Received unexpected unsolicited data" | |
1329 | " while InitialR2T=Yes, protocol error.\n"); | |
1330 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1331 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1332 | return -1; | |
1333 | } | |
1334 | /* | |
1335 | * Special case for dealing with Unsolicited DataOUT | |
1336 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1337 | * failures; | |
1338 | */ | |
1339 | ||
1340 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
e48354ce | 1341 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); |
de103c93 | 1342 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce | 1343 | dump_unsolicited_data = 1; |
e48354ce NB |
1344 | |
1345 | if (dump_unsolicited_data) { | |
1346 | /* | |
1347 | * Check if a delayed TASK_ABORTED status needs to | |
1348 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
1349 | * received with the unsolicitied data out. | |
1350 | */ | |
1351 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1352 | iscsit_stop_dataout_timer(cmd); | |
1353 | ||
1354 | transport_check_aborted_status(se_cmd, | |
1355 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1356 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1357 | } | |
1358 | } else { | |
1359 | /* | |
1360 | * For the normal solicited data path: | |
1361 | * | |
1362 | * Check for a delayed TASK_ABORTED status and dump any | |
1363 | * incoming data out payload if one exists. Also, when the | |
1364 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1365 | * data out sequence, we decrement outstanding_r2ts. Once | |
1366 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1367 | * TASK_ABORTED status. | |
1368 | */ | |
7d680f3b | 1369 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1370 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1371 | if (--cmd->outstanding_r2ts < 1) { | |
1372 | iscsit_stop_dataout_timer(cmd); | |
1373 | transport_check_aborted_status( | |
1374 | se_cmd, 1); | |
1375 | } | |
1376 | ||
1377 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1378 | } | |
1379 | } | |
1380 | /* | |
1381 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1382 | * within-command recovery checks before receiving the payload. | |
1383 | */ | |
3e1c81a9 NB |
1384 | rc = iscsit_check_pre_dataout(cmd, buf); |
1385 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1386 | return 0; |
3e1c81a9 | 1387 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce NB |
1388 | return -1; |
1389 | ||
3e1c81a9 NB |
1390 | *out_cmd = cmd; |
1391 | return 0; | |
1392 | } | |
1393 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); | |
1394 | ||
1395 | static int | |
1396 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1397 | struct iscsi_data *hdr) | |
1398 | { | |
1399 | struct kvec *iov; | |
1400 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1401 | u32 payload_length = ntoh24(hdr->dlength); | |
1402 | int iov_ret, data_crc_failed = 0; | |
1403 | ||
e48354ce NB |
1404 | rx_size += payload_length; |
1405 | iov = &cmd->iov_data[0]; | |
1406 | ||
50e5c87d CH |
1407 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1408 | payload_length); | |
e48354ce NB |
1409 | if (iov_ret < 0) |
1410 | return -1; | |
1411 | ||
1412 | iov_count += iov_ret; | |
1413 | ||
1414 | padding = ((-payload_length) & 3); | |
1415 | if (padding != 0) { | |
1416 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1417 | iov[iov_count++].iov_len = padding; | |
1418 | rx_size += padding; | |
1419 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1420 | } | |
1421 | ||
1422 | if (conn->conn_ops->DataDigest) { | |
1423 | iov[iov_count].iov_base = &checksum; | |
1424 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1425 | rx_size += ISCSI_CRC_LEN; | |
1426 | } | |
1427 | ||
1428 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1429 | ||
1430 | iscsit_unmap_iovec(cmd); | |
1431 | ||
1432 | if (rx_got != rx_size) | |
1433 | return -1; | |
1434 | ||
1435 | if (conn->conn_ops->DataDigest) { | |
1436 | u32 data_crc; | |
1437 | ||
1438 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
50e5c87d CH |
1439 | be32_to_cpu(hdr->offset), |
1440 | payload_length, padding, | |
e48354ce NB |
1441 | cmd->pad_bytes); |
1442 | ||
1443 | if (checksum != data_crc) { | |
1444 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1445 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1446 | " does not match computed 0x%08x\n", | |
1447 | hdr->itt, hdr->offset, payload_length, | |
1448 | hdr->datasn, checksum, data_crc); | |
1449 | data_crc_failed = 1; | |
1450 | } else { | |
1451 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1452 | " %u bytes of Data Out\n", checksum, | |
1453 | payload_length); | |
1454 | } | |
1455 | } | |
3e1c81a9 NB |
1456 | |
1457 | return data_crc_failed; | |
1458 | } | |
1459 | ||
1460 | int | |
1461 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1462 | bool data_crc_failed) | |
1463 | { | |
1464 | struct iscsi_conn *conn = cmd->conn; | |
1465 | int rc, ooo_cmdsn; | |
e48354ce NB |
1466 | /* |
1467 | * Increment post receive data and CRC values or perform | |
1468 | * within-command recovery. | |
1469 | */ | |
3e1c81a9 NB |
1470 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1471 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1472 | return 0; |
3e1c81a9 | 1473 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1474 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1475 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1476 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1477 | /* |
1478 | * Handle extra special case for out of order | |
1479 | * Unsolicited Data Out. | |
1480 | */ | |
1481 | spin_lock_bh(&cmd->istate_lock); | |
1482 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1483 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1484 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1485 | spin_unlock_bh(&cmd->istate_lock); | |
1486 | ||
1487 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1488 | if (ooo_cmdsn) |
1489 | return 0; | |
1490 | target_execute_cmd(&cmd->se_cmd); | |
1491 | return 0; | |
e48354ce NB |
1492 | } else /* DATAOUT_CANNOT_RECOVER */ |
1493 | return -1; | |
1494 | ||
1495 | return 0; | |
1496 | } | |
3e1c81a9 | 1497 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1498 | |
3e1c81a9 NB |
1499 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1500 | { | |
dbcbc95c | 1501 | struct iscsi_cmd *cmd = NULL; |
3e1c81a9 NB |
1502 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1503 | int rc; | |
1504 | bool data_crc_failed = false; | |
1505 | ||
1506 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1507 | if (rc < 0) | |
561bf158 | 1508 | return 0; |
3e1c81a9 NB |
1509 | else if (!cmd) |
1510 | return 0; | |
1511 | ||
1512 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1513 | if (rc < 0) | |
1514 | return rc; | |
1515 | else if (rc > 0) | |
1516 | data_crc_failed = true; | |
1517 | ||
1518 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1519 | } | |
1520 | ||
778de368 NB |
1521 | int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
1522 | struct iscsi_nopout *hdr) | |
e48354ce | 1523 | { |
778de368 | 1524 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1525 | |
a3662605 AH |
1526 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { |
1527 | pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n"); | |
1528 | if (!cmd) | |
1529 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1530 | (unsigned char *)hdr); | |
1531 | ||
1532 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, | |
1533 | (unsigned char *)hdr); | |
1534 | } | |
1535 | ||
66c7db68 | 1536 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1537 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1538 | " not set, protocol error.\n"); | |
28aaa950 NB |
1539 | if (!cmd) |
1540 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1541 | (unsigned char *)hdr); | |
1542 | ||
ba159914 NB |
1543 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1544 | (unsigned char *)hdr); | |
e48354ce NB |
1545 | } |
1546 | ||
21f5aa7e | 1547 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1548 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1549 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1550 | " error.\n", payload_length, |
21f5aa7e | 1551 | conn->conn_ops->MaxXmitDataSegmentLength); |
28aaa950 NB |
1552 | if (!cmd) |
1553 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1554 | (unsigned char *)hdr); | |
1555 | ||
ba159914 NB |
1556 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1557 | (unsigned char *)hdr); | |
e48354ce NB |
1558 | } |
1559 | ||
3e1c81a9 | 1560 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1561 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1562 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1563 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1564 | payload_length); | |
1565 | /* | |
1566 | * This is not a response to a Unsolicited NopIN, which means | |
1567 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1568 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1569 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1570 | * can contain ping data. | |
1571 | */ | |
50e5c87d | 1572 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1573 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; |
1574 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1575 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1576 | 1 : 0); | |
1577 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1578 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1579 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1580 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1581 | cmd->data_direction = DMA_NONE; |
1582 | } | |
1583 | ||
778de368 NB |
1584 | return 0; |
1585 | } | |
1586 | EXPORT_SYMBOL(iscsit_setup_nop_out); | |
1587 | ||
1588 | int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1589 | struct iscsi_nopout *hdr) | |
1590 | { | |
1591 | struct iscsi_cmd *cmd_p = NULL; | |
1592 | int cmdsn_ret = 0; | |
1593 | /* | |
1594 | * Initiator is expecting a NopIN ping reply.. | |
1595 | */ | |
1596 | if (hdr->itt != RESERVED_ITT) { | |
7cbfcc95 NB |
1597 | if (!cmd) |
1598 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1599 | (unsigned char *)hdr); | |
778de368 NB |
1600 | |
1601 | spin_lock_bh(&conn->cmd_lock); | |
1602 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
1603 | spin_unlock_bh(&conn->cmd_lock); | |
1604 | ||
1605 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
1606 | ||
1607 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1608 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1609 | cmd->i_state); | |
1610 | return 0; | |
1611 | } | |
1612 | ||
561bf158 NB |
1613 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1614 | (unsigned char *)hdr, hdr->cmdsn); | |
778de368 NB |
1615 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1616 | return 0; | |
778de368 | 1617 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1618 | return -1; |
778de368 NB |
1619 | |
1620 | return 0; | |
1621 | } | |
1622 | /* | |
1623 | * This was a response to a unsolicited NOPIN ping. | |
1624 | */ | |
1625 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { | |
1626 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); | |
1627 | if (!cmd_p) | |
1628 | return -EINVAL; | |
1629 | ||
1630 | iscsit_stop_nopin_response_timer(conn); | |
1631 | ||
1632 | cmd_p->i_state = ISTATE_REMOVE; | |
1633 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
1634 | ||
1635 | iscsit_start_nopin_timer(conn); | |
1636 | return 0; | |
1637 | } | |
1638 | /* | |
1639 | * Otherwise, initiator is not expecting a NOPIN is response. | |
1640 | * Just ignore for now. | |
1641 | */ | |
1642 | return 0; | |
1643 | } | |
1644 | EXPORT_SYMBOL(iscsit_process_nop_out); | |
1645 | ||
1646 | static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1647 | unsigned char *buf) | |
1648 | { | |
1649 | unsigned char *ping_data = NULL; | |
1650 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1651 | struct kvec *iov = NULL; | |
1652 | u32 payload_length = ntoh24(hdr->dlength); | |
1653 | int ret; | |
1654 | ||
1655 | ret = iscsit_setup_nop_out(conn, cmd, hdr); | |
1656 | if (ret < 0) | |
561bf158 | 1657 | return 0; |
778de368 NB |
1658 | /* |
1659 | * Handle NOP-OUT payload for traditional iSCSI sockets | |
1660 | */ | |
50e5c87d | 1661 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
778de368 NB |
1662 | u32 checksum, data_crc, padding = 0; |
1663 | int niov = 0, rx_got, rx_size = payload_length; | |
1664 | ||
e48354ce NB |
1665 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); |
1666 | if (!ping_data) { | |
1667 | pr_err("Unable to allocate memory for" | |
1668 | " NOPOUT ping data.\n"); | |
1669 | ret = -1; | |
1670 | goto out; | |
1671 | } | |
1672 | ||
1673 | iov = &cmd->iov_misc[0]; | |
1674 | iov[niov].iov_base = ping_data; | |
1675 | iov[niov++].iov_len = payload_length; | |
1676 | ||
1677 | padding = ((-payload_length) & 3); | |
1678 | if (padding != 0) { | |
1679 | pr_debug("Receiving %u additional bytes" | |
1680 | " for padding.\n", padding); | |
1681 | iov[niov].iov_base = &cmd->pad_bytes; | |
1682 | iov[niov++].iov_len = padding; | |
1683 | rx_size += padding; | |
1684 | } | |
1685 | if (conn->conn_ops->DataDigest) { | |
1686 | iov[niov].iov_base = &checksum; | |
1687 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1688 | rx_size += ISCSI_CRC_LEN; | |
1689 | } | |
1690 | ||
1691 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1692 | if (rx_got != rx_size) { | |
1693 | ret = -1; | |
1694 | goto out; | |
1695 | } | |
1696 | ||
1697 | if (conn->conn_ops->DataDigest) { | |
1698 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1699 | ping_data, payload_length, | |
1700 | padding, cmd->pad_bytes, | |
1701 | (u8 *)&data_crc); | |
1702 | ||
1703 | if (checksum != data_crc) { | |
1704 | pr_err("Ping data CRC32C DataDigest" | |
1705 | " 0x%08x does not match computed 0x%08x\n", | |
1706 | checksum, data_crc); | |
1707 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1708 | pr_err("Unable to recover from" | |
1709 | " NOPOUT Ping DataCRC failure while in" | |
1710 | " ERL=0.\n"); | |
1711 | ret = -1; | |
1712 | goto out; | |
1713 | } else { | |
1714 | /* | |
1715 | * Silently drop this PDU and let the | |
1716 | * initiator plug the CmdSN gap. | |
1717 | */ | |
1718 | pr_debug("Dropping NOPOUT" | |
1719 | " Command CmdSN: 0x%08x due to" | |
1720 | " DataCRC error.\n", hdr->cmdsn); | |
1721 | ret = 0; | |
1722 | goto out; | |
1723 | } | |
1724 | } else { | |
1725 | pr_debug("Got CRC32C DataDigest" | |
1726 | " 0x%08x for %u bytes of ping data.\n", | |
1727 | checksum, payload_length); | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | ping_data[payload_length] = '\0'; | |
1732 | /* | |
1733 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1734 | */ | |
8359cf43 | 1735 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1736 | cmd->buf_ptr_size = payload_length; |
1737 | ||
1738 | pr_debug("Got %u bytes of NOPOUT ping" | |
1739 | " data.\n", payload_length); | |
1740 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1741 | } | |
1742 | ||
778de368 | 1743 | return iscsit_process_nop_out(conn, cmd, hdr); |
e48354ce NB |
1744 | out: |
1745 | if (cmd) | |
aafc9d15 | 1746 | iscsit_free_cmd(cmd, false); |
778de368 | 1747 | |
e48354ce NB |
1748 | kfree(ping_data); |
1749 | return ret; | |
1750 | } | |
1751 | ||
3e1c81a9 NB |
1752 | int |
1753 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1754 | unsigned char *buf) | |
e48354ce | 1755 | { |
e48354ce NB |
1756 | struct se_tmr_req *se_tmr; |
1757 | struct iscsi_tmr_req *tmr_req; | |
1758 | struct iscsi_tm *hdr; | |
186a9647 NB |
1759 | int out_of_order_cmdsn = 0, ret; |
1760 | bool sess_ref = false; | |
e48354ce NB |
1761 | u8 function; |
1762 | ||
1763 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1764 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1765 | function = hdr->flags; | |
1766 | ||
1767 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1768 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1769 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1770 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1771 | ||
1772 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1773 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1774 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1775 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1776 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1777 | } |
1778 | ||
1779 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1780 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1781 | pr_err("Task Management Request TASK_REASSIGN not" | |
1782 | " issued as immediate command, bad iSCSI Initiator" | |
1783 | "implementation\n"); | |
ba159914 NB |
1784 | return iscsit_add_reject_cmd(cmd, |
1785 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1786 | } |
1787 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1788 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1789 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1790 | |
d28b1169 AG |
1791 | cmd->data_direction = DMA_NONE; |
1792 | ||
1793 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1794 | if (!cmd->tmr_req) { | |
1795 | pr_err("Unable to allocate memory for" | |
1796 | " Task Management command!\n"); | |
ba159914 NB |
1797 | return iscsit_add_reject_cmd(cmd, |
1798 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1799 | buf); | |
d28b1169 AG |
1800 | } |
1801 | ||
1802 | /* | |
1803 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1804 | * LIO-Target $FABRIC_MOD | |
1805 | */ | |
1806 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1807 | ||
1808 | u8 tcm_function; | |
1809 | int ret; | |
1810 | ||
1811 | transport_init_se_cmd(&cmd->se_cmd, | |
1812 | &lio_target_fabric_configfs->tf_ops, | |
1813 | conn->sess->se_sess, 0, DMA_NONE, | |
9c58b7dd | 1814 | MSG_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 | 1815 | |
186a9647 NB |
1816 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); |
1817 | sess_ref = true; | |
1818 | ||
d28b1169 AG |
1819 | switch (function) { |
1820 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1821 | tcm_function = TMR_ABORT_TASK; | |
1822 | break; | |
1823 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1824 | tcm_function = TMR_ABORT_TASK_SET; | |
1825 | break; | |
1826 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1827 | tcm_function = TMR_CLEAR_ACA; | |
1828 | break; | |
1829 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1830 | tcm_function = TMR_CLEAR_TASK_SET; | |
1831 | break; | |
1832 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1833 | tcm_function = TMR_LUN_RESET; | |
1834 | break; | |
1835 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1836 | tcm_function = TMR_TARGET_WARM_RESET; | |
1837 | break; | |
1838 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1839 | tcm_function = TMR_TARGET_COLD_RESET; | |
1840 | break; | |
1841 | default: | |
1842 | pr_err("Unknown iSCSI TMR Function:" | |
1843 | " 0x%02x\n", function); | |
ba159914 NB |
1844 | return iscsit_add_reject_cmd(cmd, |
1845 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
1846 | } |
1847 | ||
1848 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
1849 | tcm_function, GFP_KERNEL); | |
1850 | if (ret < 0) | |
ba159914 NB |
1851 | return iscsit_add_reject_cmd(cmd, |
1852 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
1853 | |
1854 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
1855 | } | |
e48354ce NB |
1856 | |
1857 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
1858 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
1859 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1860 | cmd->init_task_tag = hdr->itt; | |
1861 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1862 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1863 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1864 | se_tmr = cmd->se_cmd.se_tmr_req; |
1865 | tmr_req = cmd->tmr_req; | |
1866 | /* | |
1867 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
1868 | */ | |
1869 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
1870 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
1871 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 1872 | if (ret < 0) { |
e48354ce NB |
1873 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
1874 | goto attach; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | switch (function) { | |
1879 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1880 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 1881 | if (se_tmr->response) |
e48354ce | 1882 | goto attach; |
e48354ce NB |
1883 | break; |
1884 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1885 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1886 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1887 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1888 | break; | |
1889 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1890 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1891 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1892 | goto attach; | |
1893 | } | |
1894 | break; | |
1895 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1896 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1897 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1898 | goto attach; | |
1899 | } | |
1900 | break; | |
1901 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
1902 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
1903 | /* | |
1904 | * Perform sanity checks on the ExpDataSN only if the | |
1905 | * TASK_REASSIGN was successful. | |
1906 | */ | |
de103c93 | 1907 | if (se_tmr->response) |
e48354ce NB |
1908 | break; |
1909 | ||
1910 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
ba159914 NB |
1911 | return iscsit_add_reject_cmd(cmd, |
1912 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1913 | break; |
1914 | default: | |
1915 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
1916 | " error.\n", function); | |
e48354ce NB |
1917 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
1918 | goto attach; | |
1919 | } | |
1920 | ||
1921 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1922 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
1923 | se_tmr->call_transport = 1; | |
1924 | attach: | |
1925 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1926 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1927 | spin_unlock_bh(&conn->cmd_lock); |
1928 | ||
1929 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 | 1930 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
e48354ce NB |
1931 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) |
1932 | out_of_order_cmdsn = 1; | |
5a4c8666 | 1933 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 1934 | return 0; |
5a4c8666 | 1935 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1936 | return -1; |
e48354ce | 1937 | } |
50e5c87d | 1938 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 1939 | |
5a4c8666 | 1940 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
1941 | return 0; |
1942 | /* | |
1943 | * Found the referenced task, send to transport for processing. | |
1944 | */ | |
1945 | if (se_tmr->call_transport) | |
1946 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
1947 | ||
1948 | /* | |
1949 | * Could not find the referenced LUN, task, or Task Management | |
1950 | * command not authorized or supported. Change state and | |
1951 | * let the tx_thread send the response. | |
1952 | * | |
1953 | * For connection recovery, this is also the default action for | |
1954 | * TMR TASK_REASSIGN. | |
1955 | */ | |
186a9647 NB |
1956 | if (sess_ref) { |
1957 | pr_debug("Handle TMR, using sess_ref=true check\n"); | |
1958 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
1959 | } | |
1960 | ||
e48354ce NB |
1961 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); |
1962 | return 0; | |
1963 | } | |
3e1c81a9 | 1964 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
1965 | |
1966 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
64534aa7 NB |
1967 | int |
1968 | iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1969 | struct iscsi_text *hdr) | |
e48354ce | 1970 | { |
64534aa7 | 1971 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1972 | |
21f5aa7e | 1973 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1974 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
1975 | "greater than MaxXmitDataSegmentLength %u.\n", |
1976 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1977 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1978 | (unsigned char *)hdr); | |
e48354ce NB |
1979 | } |
1980 | ||
122f8afc NB |
1981 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || |
1982 | (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { | |
1983 | pr_err("Multi sequence text commands currently not supported\n"); | |
1984 | return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, | |
1985 | (unsigned char *)hdr); | |
1986 | } | |
1987 | ||
e48354ce NB |
1988 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," |
1989 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
1990 | hdr->exp_statsn, payload_length); | |
1991 | ||
64534aa7 NB |
1992 | cmd->iscsi_opcode = ISCSI_OP_TEXT; |
1993 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
1994 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1995 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1996 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
1997 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); | |
1998 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
1999 | cmd->data_direction = DMA_NONE; | |
2000 | ||
2001 | return 0; | |
2002 | } | |
2003 | EXPORT_SYMBOL(iscsit_setup_text_cmd); | |
2004 | ||
2005 | int | |
2006 | iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2007 | struct iscsi_text *hdr) | |
2008 | { | |
9864ca9d | 2009 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr; |
64534aa7 NB |
2010 | int cmdsn_ret; |
2011 | ||
9864ca9d NB |
2012 | if (!text_in) { |
2013 | pr_err("Unable to locate text_in buffer for sendtargets" | |
2014 | " discovery\n"); | |
2015 | goto reject; | |
2016 | } | |
2017 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
2018 | pr_err("Received Text Data that is not" | |
2019 | " SendTargets, cannot continue.\n"); | |
2020 | goto reject; | |
2021 | } | |
2022 | text_ptr = strchr(text_in, '='); | |
2023 | if (!text_ptr) { | |
2024 | pr_err("No \"=\" separator found in Text Data," | |
2025 | " cannot continue.\n"); | |
2026 | goto reject; | |
2027 | } | |
2028 | if (!strncmp("=All", text_ptr, 4)) { | |
2029 | cmd->cmd_flags |= IFC_SENDTARGETS_ALL; | |
6665889c NB |
2030 | } else if (!strncmp("=iqn.", text_ptr, 5) || |
2031 | !strncmp("=eui.", text_ptr, 5)) { | |
2032 | cmd->cmd_flags |= IFC_SENDTARGETS_SINGLE; | |
9864ca9d NB |
2033 | } else { |
2034 | pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); | |
2035 | goto reject; | |
2036 | } | |
2037 | ||
64534aa7 NB |
2038 | spin_lock_bh(&conn->cmd_lock); |
2039 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
2040 | spin_unlock_bh(&conn->cmd_lock); | |
2041 | ||
2042 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
2043 | ||
2044 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 NB |
2045 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
2046 | (unsigned char *)hdr, hdr->cmdsn); | |
64534aa7 | 2047 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 NB |
2048 | return -1; |
2049 | ||
64534aa7 NB |
2050 | return 0; |
2051 | } | |
2052 | ||
2053 | return iscsit_execute_cmd(cmd, 0); | |
9864ca9d NB |
2054 | |
2055 | reject: | |
ba159914 NB |
2056 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2057 | (unsigned char *)hdr); | |
64534aa7 NB |
2058 | } |
2059 | EXPORT_SYMBOL(iscsit_process_text_cmd); | |
2060 | ||
2061 | static int | |
2062 | iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2063 | unsigned char *buf) | |
2064 | { | |
2065 | struct iscsi_text *hdr = (struct iscsi_text *)buf; | |
2066 | char *text_in = NULL; | |
2067 | u32 payload_length = ntoh24(hdr->dlength); | |
2068 | int rx_size, rc; | |
2069 | ||
2070 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
2071 | if (rc < 0) | |
561bf158 | 2072 | return 0; |
64534aa7 NB |
2073 | |
2074 | rx_size = payload_length; | |
2075 | if (payload_length) { | |
64534aa7 NB |
2076 | u32 checksum = 0, data_crc = 0; |
2077 | u32 padding = 0, pad_bytes = 0; | |
2078 | int niov = 0, rx_got; | |
2079 | struct kvec iov[3]; | |
2080 | ||
2081 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
e48354ce NB |
2082 | if (!text_in) { |
2083 | pr_err("Unable to allocate memory for" | |
2084 | " incoming text parameters\n"); | |
64534aa7 | 2085 | goto reject; |
e48354ce | 2086 | } |
9864ca9d | 2087 | cmd->text_in_ptr = text_in; |
e48354ce NB |
2088 | |
2089 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
2090 | iov[niov].iov_base = text_in; | |
64534aa7 | 2091 | iov[niov++].iov_len = payload_length; |
e48354ce NB |
2092 | |
2093 | padding = ((-payload_length) & 3); | |
2094 | if (padding != 0) { | |
76f1928e | 2095 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
2096 | iov[niov++].iov_len = padding; |
2097 | rx_size += padding; | |
2098 | pr_debug("Receiving %u additional bytes" | |
2099 | " for padding.\n", padding); | |
2100 | } | |
2101 | if (conn->conn_ops->DataDigest) { | |
2102 | iov[niov].iov_base = &checksum; | |
2103 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2104 | rx_size += ISCSI_CRC_LEN; | |
2105 | } | |
2106 | ||
2107 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
64534aa7 NB |
2108 | if (rx_got != rx_size) |
2109 | goto reject; | |
e48354ce NB |
2110 | |
2111 | if (conn->conn_ops->DataDigest) { | |
2112 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
64534aa7 | 2113 | text_in, payload_length, |
76f1928e | 2114 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
2115 | (u8 *)&data_crc); |
2116 | ||
2117 | if (checksum != data_crc) { | |
2118 | pr_err("Text data CRC32C DataDigest" | |
2119 | " 0x%08x does not match computed" | |
2120 | " 0x%08x\n", checksum, data_crc); | |
2121 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2122 | pr_err("Unable to recover from" | |
2123 | " Text Data digest failure while in" | |
2124 | " ERL=0.\n"); | |
64534aa7 | 2125 | goto reject; |
e48354ce NB |
2126 | } else { |
2127 | /* | |
2128 | * Silently drop this PDU and let the | |
2129 | * initiator plug the CmdSN gap. | |
2130 | */ | |
2131 | pr_debug("Dropping Text" | |
2132 | " Command CmdSN: 0x%08x due to" | |
2133 | " DataCRC error.\n", hdr->cmdsn); | |
2134 | kfree(text_in); | |
2135 | return 0; | |
2136 | } | |
2137 | } else { | |
2138 | pr_debug("Got CRC32C DataDigest" | |
2139 | " 0x%08x for %u bytes of text data.\n", | |
64534aa7 | 2140 | checksum, payload_length); |
e48354ce NB |
2141 | } |
2142 | } | |
64534aa7 | 2143 | text_in[payload_length - 1] = '\0'; |
e48354ce | 2144 | pr_debug("Successfully read %d bytes of text" |
64534aa7 | 2145 | " data.\n", payload_length); |
e48354ce NB |
2146 | } |
2147 | ||
64534aa7 | 2148 | return iscsit_process_text_cmd(conn, cmd, hdr); |
e48354ce | 2149 | |
64534aa7 | 2150 | reject: |
9864ca9d NB |
2151 | kfree(cmd->text_in_ptr); |
2152 | cmd->text_in_ptr = NULL; | |
ba159914 | 2153 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce | 2154 | } |
64534aa7 | 2155 | EXPORT_SYMBOL(iscsit_handle_text_cmd); |
e48354ce NB |
2156 | |
2157 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2158 | { | |
2159 | struct iscsi_conn *conn_p; | |
2160 | struct iscsi_session *sess = conn->sess; | |
2161 | ||
2162 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2163 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2164 | ||
2165 | atomic_set(&sess->session_logout, 1); | |
2166 | atomic_set(&conn->conn_logout_remove, 1); | |
2167 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2168 | ||
2169 | iscsit_inc_conn_usage_count(conn); | |
2170 | iscsit_inc_session_usage_count(sess); | |
2171 | ||
2172 | spin_lock_bh(&sess->conn_lock); | |
2173 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2174 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2175 | continue; | |
2176 | ||
2177 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2178 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2179 | } | |
2180 | spin_unlock_bh(&sess->conn_lock); | |
2181 | ||
2182 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2183 | ||
2184 | return 0; | |
2185 | } | |
2186 | ||
2187 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2188 | { | |
2189 | struct iscsi_conn *l_conn; | |
2190 | struct iscsi_session *sess = conn->sess; | |
2191 | ||
2192 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2193 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2194 | ||
2195 | /* | |
2196 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2197 | * can arrive on a connection with a differing CID. | |
2198 | */ | |
2199 | if (conn->cid == cmd->logout_cid) { | |
2200 | spin_lock_bh(&conn->state_lock); | |
2201 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2202 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2203 | ||
2204 | atomic_set(&conn->conn_logout_remove, 1); | |
2205 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2206 | iscsit_inc_conn_usage_count(conn); | |
2207 | ||
2208 | spin_unlock_bh(&conn->state_lock); | |
2209 | } else { | |
2210 | /* | |
2211 | * Handle all different cid CLOSECONNECTION requests in | |
2212 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2213 | * time for any non immediate command's CmdSN to be | |
2214 | * acknowledged on the connection in question. | |
2215 | * | |
2216 | * Here we simply make sure the CID is still around. | |
2217 | */ | |
2218 | l_conn = iscsit_get_conn_from_cid(sess, | |
2219 | cmd->logout_cid); | |
2220 | if (!l_conn) { | |
2221 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2222 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2223 | cmd->i_state); | |
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | iscsit_dec_conn_usage_count(l_conn); | |
2228 | } | |
2229 | ||
2230 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2231 | ||
2232 | return 0; | |
2233 | } | |
2234 | ||
2235 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2236 | { | |
2237 | struct iscsi_session *sess = conn->sess; | |
2238 | ||
2239 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2240 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2241 | ||
2242 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2243 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2244 | " while ERL!=2.\n"); | |
2245 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2246 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2247 | return 0; | |
2248 | } | |
2249 | ||
2250 | if (conn->cid == cmd->logout_cid) { | |
2251 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2252 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2253 | cmd->logout_cid, conn->cid); | |
2254 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2255 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2256 | return 0; | |
2257 | } | |
2258 | ||
2259 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2260 | ||
2261 | return 0; | |
2262 | } | |
2263 | ||
3e1c81a9 NB |
2264 | int |
2265 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2266 | unsigned char *buf) | |
e48354ce NB |
2267 | { |
2268 | int cmdsn_ret, logout_remove = 0; | |
2269 | u8 reason_code = 0; | |
e48354ce NB |
2270 | struct iscsi_logout *hdr; |
2271 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2272 | ||
2273 | hdr = (struct iscsi_logout *) buf; | |
2274 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2275 | |
2276 | if (tiqn) { | |
2277 | spin_lock(&tiqn->logout_stats.lock); | |
2278 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2279 | tiqn->logout_stats.normal_logouts++; | |
2280 | else | |
2281 | tiqn->logout_stats.abnormal_logouts++; | |
2282 | spin_unlock(&tiqn->logout_stats.lock); | |
2283 | } | |
2284 | ||
2285 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2286 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2287 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2288 | hdr->cid, conn->cid); | |
2289 | ||
2290 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2291 | pr_err("Received logout request on connection that" | |
2292 | " is not in logged in state, ignoring request.\n"); | |
aafc9d15 | 2293 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
2294 | return 0; |
2295 | } | |
2296 | ||
e48354ce NB |
2297 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2298 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2299 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2300 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2301 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2302 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2303 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2304 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2305 | cmd->logout_reason = reason_code; |
2306 | cmd->data_direction = DMA_NONE; | |
2307 | ||
2308 | /* | |
2309 | * We need to sleep in these cases (by returning 1) until the Logout | |
2310 | * Response gets sent in the tx thread. | |
2311 | */ | |
2312 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2313 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2314 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2315 | logout_remove = 1; |
2316 | ||
2317 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2318 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2319 | spin_unlock_bh(&conn->cmd_lock); |
2320 | ||
2321 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2322 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2323 | |
2324 | /* | |
2325 | * Immediate commands are executed, well, immediately. | |
2326 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2327 | */ | |
c6037cc5 | 2328 | if (cmd->immediate_cmd) { |
e48354ce NB |
2329 | int ret = iscsit_execute_cmd(cmd, 0); |
2330 | ||
2331 | if (ret < 0) | |
2332 | return ret; | |
2333 | } else { | |
561bf158 | 2334 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
ba159914 | 2335 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2336 | logout_remove = 0; |
ba159914 NB |
2337 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
2338 | return -1; | |
e48354ce NB |
2339 | } |
2340 | ||
2341 | return logout_remove; | |
2342 | } | |
3e1c81a9 | 2343 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce NB |
2344 | |
2345 | static int iscsit_handle_snack( | |
2346 | struct iscsi_conn *conn, | |
2347 | unsigned char *buf) | |
2348 | { | |
e48354ce NB |
2349 | struct iscsi_snack *hdr; |
2350 | ||
2351 | hdr = (struct iscsi_snack *) buf; | |
2352 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2353 | |
2354 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2355 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2356 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2357 | hdr->begrun, hdr->runlength, conn->cid); | |
2358 | ||
2359 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2360 | pr_err("Initiator sent SNACK request while in" | |
2361 | " ErrorRecoveryLevel=0.\n"); | |
ba159914 NB |
2362 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2363 | buf); | |
e48354ce NB |
2364 | } |
2365 | /* | |
2366 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2367 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2368 | */ | |
2369 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2370 | case 0: | |
2371 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2372 | hdr->itt, |
2373 | be32_to_cpu(hdr->ttt), | |
2374 | be32_to_cpu(hdr->begrun), | |
2375 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2376 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2377 | return iscsit_handle_status_snack(conn, hdr->itt, |
2378 | be32_to_cpu(hdr->ttt), | |
2379 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2380 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2381 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2382 | be32_to_cpu(hdr->begrun), | |
2383 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2384 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2385 | /* FIXME: Support R-Data SNACK */ | |
2386 | pr_err("R-Data SNACK Not Supported.\n"); | |
ba159914 NB |
2387 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2388 | buf); | |
e48354ce NB |
2389 | default: |
2390 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2391 | " error.\n", hdr->flags & 0x0f); | |
ba159914 NB |
2392 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2393 | buf); | |
e48354ce NB |
2394 | } |
2395 | ||
2396 | return 0; | |
2397 | } | |
2398 | ||
2399 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2400 | { | |
2401 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2402 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2403 | wait_for_completion_interruptible_timeout( | |
2404 | &conn->rx_half_close_comp, | |
2405 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2406 | } | |
2407 | } | |
2408 | ||
2409 | static int iscsit_handle_immediate_data( | |
2410 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2411 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2412 | u32 length) |
2413 | { | |
2414 | int iov_ret, rx_got = 0, rx_size = 0; | |
2415 | u32 checksum, iov_count = 0, padding = 0; | |
2416 | struct iscsi_conn *conn = cmd->conn; | |
2417 | struct kvec *iov; | |
2418 | ||
2419 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2420 | if (iov_ret < 0) | |
2421 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2422 | ||
2423 | rx_size = length; | |
2424 | iov_count = iov_ret; | |
2425 | iov = &cmd->iov_data[0]; | |
2426 | ||
2427 | padding = ((-length) & 3); | |
2428 | if (padding != 0) { | |
2429 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2430 | iov[iov_count++].iov_len = padding; | |
2431 | rx_size += padding; | |
2432 | } | |
2433 | ||
2434 | if (conn->conn_ops->DataDigest) { | |
2435 | iov[iov_count].iov_base = &checksum; | |
2436 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2437 | rx_size += ISCSI_CRC_LEN; | |
2438 | } | |
2439 | ||
2440 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2441 | ||
2442 | iscsit_unmap_iovec(cmd); | |
2443 | ||
2444 | if (rx_got != rx_size) { | |
2445 | iscsit_rx_thread_wait_for_tcp(conn); | |
2446 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2447 | } | |
2448 | ||
2449 | if (conn->conn_ops->DataDigest) { | |
2450 | u32 data_crc; | |
2451 | ||
2452 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
2453 | cmd->write_data_done, length, padding, | |
2454 | cmd->pad_bytes); | |
2455 | ||
2456 | if (checksum != data_crc) { | |
2457 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2458 | " does not match computed 0x%08x\n", checksum, | |
2459 | data_crc); | |
2460 | ||
2461 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2462 | pr_err("Unable to recover from" | |
2463 | " Immediate Data digest failure while" | |
2464 | " in ERL=0.\n"); | |
ba159914 | 2465 | iscsit_reject_cmd(cmd, |
e48354ce | 2466 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2467 | (unsigned char *)hdr); |
e48354ce NB |
2468 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2469 | } else { | |
ba159914 | 2470 | iscsit_reject_cmd(cmd, |
e48354ce | 2471 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2472 | (unsigned char *)hdr); |
e48354ce NB |
2473 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2474 | } | |
2475 | } else { | |
2476 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2477 | " %u bytes of Immediate Data\n", checksum, | |
2478 | length); | |
2479 | } | |
2480 | } | |
2481 | ||
2482 | cmd->write_data_done += length; | |
2483 | ||
ebf1d95c | 2484 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2485 | spin_lock_bh(&cmd->istate_lock); |
2486 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2487 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2488 | spin_unlock_bh(&cmd->istate_lock); | |
2489 | } | |
2490 | ||
2491 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2492 | } | |
2493 | ||
2494 | /* | |
2495 | * Called with sess->conn_lock held. | |
2496 | */ | |
2497 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2498 | with active network interface */ | |
2499 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2500 | { | |
2501 | struct iscsi_cmd *cmd; | |
2502 | struct iscsi_conn *conn_p; | |
d444edc6 | 2503 | bool found = false; |
e48354ce NB |
2504 | |
2505 | /* | |
2506 | * Only send a Asynchronous Message on connections whos network | |
2507 | * interface is still functional. | |
2508 | */ | |
2509 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2510 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2511 | iscsit_inc_conn_usage_count(conn_p); | |
d444edc6 | 2512 | found = true; |
e48354ce NB |
2513 | break; |
2514 | } | |
2515 | } | |
2516 | ||
d444edc6 | 2517 | if (!found) |
e48354ce NB |
2518 | return; |
2519 | ||
676687c6 | 2520 | cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING); |
e48354ce NB |
2521 | if (!cmd) { |
2522 | iscsit_dec_conn_usage_count(conn_p); | |
2523 | return; | |
2524 | } | |
2525 | ||
2526 | cmd->logout_cid = conn->cid; | |
2527 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2528 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2529 | ||
2530 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2531 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2532 | spin_unlock_bh(&conn_p->cmd_lock); |
2533 | ||
2534 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2535 | iscsit_dec_conn_usage_count(conn_p); | |
2536 | } | |
2537 | ||
2538 | static int iscsit_send_conn_drop_async_message( | |
2539 | struct iscsi_cmd *cmd, | |
2540 | struct iscsi_conn *conn) | |
2541 | { | |
2542 | struct iscsi_async *hdr; | |
2543 | ||
2544 | cmd->tx_size = ISCSI_HDR_LEN; | |
2545 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2546 | ||
2547 | hdr = (struct iscsi_async *) cmd->pdu; | |
2548 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2549 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2550 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2551 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2552 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2553 | cmd->stat_sn = conn->stat_sn++; | |
2554 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2555 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2556 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2557 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; | |
2558 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2559 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2560 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2561 | ||
2562 | if (conn->conn_ops->HeaderDigest) { | |
2563 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2564 | ||
80690fdb GU |
2565 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2566 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2567 | |
2568 | cmd->tx_size += ISCSI_CRC_LEN; | |
2569 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2570 | " Async Message 0x%08x\n", *header_digest); | |
2571 | } | |
2572 | ||
2573 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2574 | cmd->iov_misc[0].iov_len = cmd->tx_size; | |
2575 | cmd->iov_misc_count = 1; | |
2576 | ||
2577 | pr_debug("Sending Connection Dropped Async Message StatSN:" | |
2578 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2579 | cmd->logout_cid, conn->cid); | |
2580 | return 0; | |
2581 | } | |
2582 | ||
6f3c0e69 AG |
2583 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2584 | { | |
2585 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2586 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2587 | wait_for_completion_interruptible_timeout( | |
2588 | &conn->tx_half_close_comp, | |
2589 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2590 | } | |
2591 | } | |
2592 | ||
2ec5a8c1 NB |
2593 | static void |
2594 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2595 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2596 | bool set_statsn) | |
e48354ce | 2597 | { |
2ec5a8c1 NB |
2598 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2599 | hdr->flags = datain->flags; | |
2600 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2601 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2602 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2603 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2604 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2605 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2606 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2607 | } | |
2608 | } | |
2609 | hton24(hdr->dlength, datain->length); | |
2610 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2611 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2612 | (struct scsi_lun *)&hdr->lun); | |
2613 | else | |
2614 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2615 | ||
2616 | hdr->itt = cmd->init_task_tag; | |
2617 | ||
2618 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2619 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2620 | else | |
2621 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2622 | if (set_statsn) | |
2623 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2624 | else | |
2625 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2626 | ||
2627 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2628 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2629 | hdr->datasn = cpu_to_be32(datain->data_sn); | |
2630 | hdr->offset = cpu_to_be32(datain->offset); | |
2631 | ||
2632 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2633 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2634 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2635 | ntohl(hdr->offset), datain->length, conn->cid); | |
2636 | } | |
2637 | ||
2638 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2639 | { | |
2640 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2641 | struct iscsi_datain datain; |
2642 | struct iscsi_datain_req *dr; | |
e48354ce | 2643 | struct kvec *iov; |
2ec5a8c1 NB |
2644 | u32 iov_count = 0, tx_size = 0; |
2645 | int eodr = 0, ret, iov_ret; | |
2646 | bool set_statsn = false; | |
e48354ce NB |
2647 | |
2648 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2649 | dr = iscsit_get_datain_values(cmd, &datain); | |
2650 | if (!dr) { | |
2651 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2652 | cmd->init_task_tag); | |
2653 | return -1; | |
2654 | } | |
e48354ce NB |
2655 | /* |
2656 | * Be paranoid and double check the logic for now. | |
2657 | */ | |
ebf1d95c | 2658 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2659 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2660 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2661 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2662 | cmd->se_cmd.data_length); |
e48354ce NB |
2663 | return -1; |
2664 | } | |
2665 | ||
04f3b31b | 2666 | atomic_long_add(datain.length, &conn->sess->tx_data_octets); |
e48354ce NB |
2667 | /* |
2668 | * Special case for successfully execution w/ both DATAIN | |
2669 | * and Sense Data. | |
2670 | */ | |
2671 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2672 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2673 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2674 | else { | |
2675 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2676 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2677 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2678 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2679 | set_statsn = true; |
e48354ce | 2680 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2681 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2682 | set_statsn = true; | |
e48354ce NB |
2683 | } |
2684 | ||
2ec5a8c1 | 2685 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce NB |
2686 | |
2687 | iov = &cmd->iov_data[0]; | |
2688 | iov[iov_count].iov_base = cmd->pdu; | |
2689 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
2690 | tx_size += ISCSI_HDR_LEN; | |
2691 | ||
2692 | if (conn->conn_ops->HeaderDigest) { | |
2693 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2694 | ||
80690fdb GU |
2695 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, |
2696 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2697 | |
2698 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2699 | tx_size += ISCSI_CRC_LEN; | |
2700 | ||
2701 | pr_debug("Attaching CRC32 HeaderDigest" | |
2702 | " for DataIN PDU 0x%08x\n", *header_digest); | |
2703 | } | |
2704 | ||
2ec5a8c1 NB |
2705 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], |
2706 | datain.offset, datain.length); | |
e48354ce NB |
2707 | if (iov_ret < 0) |
2708 | return -1; | |
2709 | ||
2710 | iov_count += iov_ret; | |
2711 | tx_size += datain.length; | |
2712 | ||
2713 | cmd->padding = ((-datain.length) & 3); | |
2714 | if (cmd->padding) { | |
2715 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2716 | iov[iov_count++].iov_len = cmd->padding; | |
2717 | tx_size += cmd->padding; | |
2718 | ||
2719 | pr_debug("Attaching %u padding bytes\n", | |
2720 | cmd->padding); | |
2721 | } | |
2722 | if (conn->conn_ops->DataDigest) { | |
2723 | cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, | |
2724 | datain.offset, datain.length, cmd->padding, cmd->pad_bytes); | |
2725 | ||
2726 | iov[iov_count].iov_base = &cmd->data_crc; | |
2727 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2728 | tx_size += ISCSI_CRC_LEN; | |
2729 | ||
2730 | pr_debug("Attached CRC32C DataDigest %d bytes, crc" | |
2731 | " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); | |
2732 | } | |
2733 | ||
2734 | cmd->iov_data_count = iov_count; | |
2735 | cmd->tx_size = tx_size; | |
2736 | ||
6f3c0e69 AG |
2737 | /* sendpage is preferred but can't insert markers */ |
2738 | if (!conn->conn_ops->IFMarker) | |
2739 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
2740 | else | |
2741 | ret = iscsit_send_tx_data(cmd, conn, 0); | |
2742 | ||
2743 | iscsit_unmap_iovec(cmd); | |
2744 | ||
2745 | if (ret < 0) { | |
2746 | iscsit_tx_thread_wait_for_tcp(conn); | |
2747 | return ret; | |
2748 | } | |
2749 | ||
e48354ce | 2750 | if (dr->dr_complete) { |
6f3c0e69 | 2751 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2752 | 2 : 1; |
2753 | iscsit_free_datain_req(cmd, dr); | |
2754 | } | |
2755 | ||
6f3c0e69 | 2756 | return eodr; |
e48354ce NB |
2757 | } |
2758 | ||
2ec5a8c1 NB |
2759 | int |
2760 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2761 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2762 | { |
e48354ce NB |
2763 | struct iscsi_conn *logout_conn = NULL; |
2764 | struct iscsi_conn_recovery *cr = NULL; | |
2765 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2766 | /* |
2767 | * The actual shutting down of Sessions and/or Connections | |
2768 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2769 | * is done in scsi_logout_post_handler(). | |
2770 | */ | |
2771 | switch (cmd->logout_reason) { | |
2772 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2773 | pr_debug("iSCSI session logout successful, setting" | |
2774 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2775 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2776 | break; | |
2777 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2778 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2779 | break; | |
2780 | /* | |
2781 | * For CLOSECONNECTION logout requests carrying | |
2782 | * a matching logout CID -> local CID, the reference | |
2783 | * for the local CID will have been incremented in | |
2784 | * iscsi_logout_closeconnection(). | |
2785 | * | |
2786 | * For CLOSECONNECTION logout requests carrying | |
2787 | * a different CID than the connection it arrived | |
2788 | * on, the connection responding to cmd->logout_cid | |
2789 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2790 | */ | |
2791 | ||
2792 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2793 | " successful.\n", cmd->logout_cid, conn->cid); | |
2794 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2795 | break; | |
2796 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2797 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2798 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2799 | break; | |
2800 | /* | |
2801 | * If the connection is still active from our point of view | |
2802 | * force connection recovery to occur. | |
2803 | */ | |
2804 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2805 | cmd->logout_cid); | |
ee1b1b9c | 2806 | if (logout_conn) { |
e48354ce NB |
2807 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2808 | iscsit_dec_conn_usage_count(logout_conn); | |
2809 | } | |
2810 | ||
2811 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2812 | conn->sess, cmd->logout_cid); | |
2813 | if (!cr) { | |
2814 | pr_err("Unable to locate CID: %hu for" | |
2815 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2816 | cmd->logout_cid); | |
2817 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2818 | break; | |
2819 | } | |
2820 | ||
2821 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2822 | ||
2823 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2824 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2825 | cmd->logout_cid, conn->cid); | |
2826 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2827 | break; | |
2828 | default: | |
2829 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2830 | cmd->logout_reason); | |
2831 | return -1; | |
2832 | } | |
2833 | ||
e48354ce NB |
2834 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2835 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2836 | hdr->response = cmd->logout_response; | |
66c7db68 | 2837 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2838 | cmd->stat_sn = conn->stat_sn++; |
2839 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2840 | ||
2841 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2842 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2843 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2844 | ||
2ec5a8c1 NB |
2845 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2846 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2847 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2848 | cmd->logout_cid, conn->cid); | |
2849 | ||
2850 | return 0; | |
2851 | } | |
2852 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2853 | ||
2854 | static int | |
2855 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2856 | { | |
2857 | struct kvec *iov; | |
2858 | int niov = 0, tx_size, rc; | |
2859 | ||
2860 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2861 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2862 | if (rc < 0) | |
2863 | return rc; | |
2864 | ||
2865 | tx_size = ISCSI_HDR_LEN; | |
e48354ce NB |
2866 | iov = &cmd->iov_misc[0]; |
2867 | iov[niov].iov_base = cmd->pdu; | |
2868 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2869 | ||
2870 | if (conn->conn_ops->HeaderDigest) { | |
2871 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2872 | ||
80690fdb GU |
2873 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, &cmd->pdu[0], |
2874 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2875 | |
2876 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2877 | tx_size += ISCSI_CRC_LEN; | |
2878 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2879 | " Logout Response 0x%08x\n", *header_digest); | |
2880 | } | |
2881 | cmd->iov_misc_count = niov; | |
2882 | cmd->tx_size = tx_size; | |
2883 | ||
e48354ce NB |
2884 | return 0; |
2885 | } | |
2886 | ||
2ec5a8c1 NB |
2887 | void |
2888 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2889 | struct iscsi_nopin *hdr, bool nopout_response) | |
2890 | { | |
2891 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2892 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2893 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2894 | if (nopout_response) | |
2895 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2896 | hdr->itt = cmd->init_task_tag; | |
2897 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2898 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2899 | conn->stat_sn; | |
2900 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2901 | ||
2902 | if (nopout_response) | |
2903 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2904 | ||
2905 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2906 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2907 | ||
2908 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2909 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
2910 | "Solicitied" : "Unsolicitied", cmd->init_task_tag, | |
2911 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2912 | } | |
2913 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2914 | ||
e48354ce NB |
2915 | /* |
2916 | * Unsolicited NOPIN, either requesting a response or not. | |
2917 | */ | |
2918 | static int iscsit_send_unsolicited_nopin( | |
2919 | struct iscsi_cmd *cmd, | |
2920 | struct iscsi_conn *conn, | |
2921 | int want_response) | |
2922 | { | |
2ec5a8c1 NB |
2923 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2924 | int tx_size = ISCSI_HDR_LEN, ret; | |
e48354ce | 2925 | |
2ec5a8c1 | 2926 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce NB |
2927 | |
2928 | if (conn->conn_ops->HeaderDigest) { | |
2929 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2930 | ||
80690fdb GU |
2931 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2932 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2933 | |
2934 | tx_size += ISCSI_CRC_LEN; | |
2935 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2936 | " NopIN 0x%08x\n", *header_digest); | |
2937 | } | |
2938 | ||
2939 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2940 | cmd->iov_misc[0].iov_len = tx_size; | |
2941 | cmd->iov_misc_count = 1; | |
2942 | cmd->tx_size = tx_size; | |
2943 | ||
2944 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" | |
2945 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2946 | ||
6f3c0e69 AG |
2947 | ret = iscsit_send_tx_data(cmd, conn, 1); |
2948 | if (ret < 0) { | |
2949 | iscsit_tx_thread_wait_for_tcp(conn); | |
2950 | return ret; | |
2951 | } | |
2952 | ||
2953 | spin_lock_bh(&cmd->istate_lock); | |
2954 | cmd->i_state = want_response ? | |
2955 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
2956 | spin_unlock_bh(&cmd->istate_lock); | |
2957 | ||
e48354ce NB |
2958 | return 0; |
2959 | } | |
2960 | ||
2ec5a8c1 NB |
2961 | static int |
2962 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 2963 | { |
2ec5a8c1 | 2964 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 2965 | struct kvec *iov; |
2ec5a8c1 NB |
2966 | u32 padding = 0; |
2967 | int niov = 0, tx_size; | |
e48354ce | 2968 | |
2ec5a8c1 | 2969 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 2970 | |
2ec5a8c1 | 2971 | tx_size = ISCSI_HDR_LEN; |
e48354ce NB |
2972 | iov = &cmd->iov_misc[0]; |
2973 | iov[niov].iov_base = cmd->pdu; | |
2974 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2975 | ||
2976 | if (conn->conn_ops->HeaderDigest) { | |
2977 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2978 | ||
80690fdb GU |
2979 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2980 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2981 | |
2982 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2983 | tx_size += ISCSI_CRC_LEN; | |
2984 | pr_debug("Attaching CRC32C HeaderDigest" | |
2985 | " to NopIn 0x%08x\n", *header_digest); | |
2986 | } | |
2987 | ||
2988 | /* | |
2989 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
2990 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
2991 | */ | |
2992 | if (cmd->buf_ptr_size) { | |
2993 | iov[niov].iov_base = cmd->buf_ptr; | |
2994 | iov[niov++].iov_len = cmd->buf_ptr_size; | |
2995 | tx_size += cmd->buf_ptr_size; | |
2996 | ||
2997 | pr_debug("Echoing back %u bytes of ping" | |
2998 | " data.\n", cmd->buf_ptr_size); | |
2999 | ||
3000 | padding = ((-cmd->buf_ptr_size) & 3); | |
3001 | if (padding != 0) { | |
3002 | iov[niov].iov_base = &cmd->pad_bytes; | |
3003 | iov[niov++].iov_len = padding; | |
3004 | tx_size += padding; | |
3005 | pr_debug("Attaching %u additional" | |
3006 | " padding bytes.\n", padding); | |
3007 | } | |
3008 | if (conn->conn_ops->DataDigest) { | |
3009 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3010 | cmd->buf_ptr, cmd->buf_ptr_size, | |
3011 | padding, (u8 *)&cmd->pad_bytes, | |
3012 | (u8 *)&cmd->data_crc); | |
3013 | ||
3014 | iov[niov].iov_base = &cmd->data_crc; | |
3015 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
3016 | tx_size += ISCSI_CRC_LEN; | |
3017 | pr_debug("Attached DataDigest for %u" | |
3018 | " bytes of ping data, CRC 0x%08x\n", | |
3019 | cmd->buf_ptr_size, cmd->data_crc); | |
3020 | } | |
3021 | } | |
3022 | ||
3023 | cmd->iov_misc_count = niov; | |
3024 | cmd->tx_size = tx_size; | |
3025 | ||
e48354ce NB |
3026 | return 0; |
3027 | } | |
3028 | ||
6f3c0e69 | 3029 | static int iscsit_send_r2t( |
e48354ce NB |
3030 | struct iscsi_cmd *cmd, |
3031 | struct iscsi_conn *conn) | |
3032 | { | |
3033 | int tx_size = 0; | |
3034 | struct iscsi_r2t *r2t; | |
3035 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 3036 | int ret; |
e48354ce NB |
3037 | |
3038 | r2t = iscsit_get_r2t_from_list(cmd); | |
3039 | if (!r2t) | |
3040 | return -1; | |
3041 | ||
3042 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3043 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3044 | hdr->opcode = ISCSI_OP_R2T; | |
3045 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3046 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3047 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3048 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3049 | spin_lock_bh(&conn->sess->ttt_lock); |
3050 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
3051 | if (r2t->targ_xfer_tag == 0xFFFFFFFF) | |
3052 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
3053 | spin_unlock_bh(&conn->sess->ttt_lock); | |
3054 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); | |
3055 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3056 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3057 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3058 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); | |
3059 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3060 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3061 | ||
3062 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
3063 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3064 | tx_size += ISCSI_HDR_LEN; | |
3065 | ||
3066 | if (conn->conn_ops->HeaderDigest) { | |
3067 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3068 | ||
80690fdb GU |
3069 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3070 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3071 | |
3072 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3073 | tx_size += ISCSI_CRC_LEN; | |
3074 | pr_debug("Attaching CRC32 HeaderDigest for R2T" | |
3075 | " PDU 0x%08x\n", *header_digest); | |
3076 | } | |
3077 | ||
3078 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" | |
3079 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3080 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3081 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3082 | r2t->offset, r2t->xfer_len, conn->cid); | |
3083 | ||
3084 | cmd->iov_misc_count = 1; | |
3085 | cmd->tx_size = tx_size; | |
3086 | ||
3087 | spin_lock_bh(&cmd->r2t_lock); | |
3088 | r2t->sent_r2t = 1; | |
3089 | spin_unlock_bh(&cmd->r2t_lock); | |
3090 | ||
6f3c0e69 AG |
3091 | ret = iscsit_send_tx_data(cmd, conn, 1); |
3092 | if (ret < 0) { | |
3093 | iscsit_tx_thread_wait_for_tcp(conn); | |
3094 | return ret; | |
3095 | } | |
3096 | ||
3097 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3098 | iscsit_start_dataout_timer(cmd, conn); | |
3099 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3100 | ||
e48354ce NB |
3101 | return 0; |
3102 | } | |
3103 | ||
3104 | /* | |
8b1e1244 AG |
3105 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3106 | * connection recovery. | |
e48354ce NB |
3107 | */ |
3108 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3109 | struct iscsi_conn *conn, |
3e1c81a9 | 3110 | struct iscsi_cmd *cmd, |
8b1e1244 | 3111 | bool recovery) |
e48354ce NB |
3112 | { |
3113 | int first_r2t = 1; | |
3114 | u32 offset = 0, xfer_len = 0; | |
3115 | ||
3116 | spin_lock_bh(&cmd->r2t_lock); | |
3117 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3118 | spin_unlock_bh(&cmd->r2t_lock); | |
3119 | return 0; | |
3120 | } | |
3121 | ||
8b1e1244 AG |
3122 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3123 | !recovery) | |
c6037cc5 | 3124 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3125 | |
3126 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3127 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3128 | offset = cmd->r2t_offset; | |
3129 | ||
8b1e1244 AG |
3130 | if (first_r2t && recovery) { |
3131 | int new_data_end = offset + | |
3132 | conn->sess->sess_ops->MaxBurstLength - | |
3133 | cmd->next_burst_len; | |
3134 | ||
ebf1d95c AG |
3135 | if (new_data_end > cmd->se_cmd.data_length) |
3136 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3137 | else |
3138 | xfer_len = | |
3139 | conn->sess->sess_ops->MaxBurstLength - | |
3140 | cmd->next_burst_len; | |
e48354ce | 3141 | } else { |
8b1e1244 AG |
3142 | int new_data_end = offset + |
3143 | conn->sess->sess_ops->MaxBurstLength; | |
3144 | ||
ebf1d95c AG |
3145 | if (new_data_end > cmd->se_cmd.data_length) |
3146 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3147 | else |
3148 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3149 | } |
3150 | cmd->r2t_offset += xfer_len; | |
3151 | ||
ebf1d95c | 3152 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3153 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3154 | } else { | |
3155 | struct iscsi_seq *seq; | |
3156 | ||
3157 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3158 | if (!seq) { | |
3159 | spin_unlock_bh(&cmd->r2t_lock); | |
3160 | return -1; | |
3161 | } | |
3162 | ||
3163 | offset = seq->offset; | |
3164 | xfer_len = seq->xfer_len; | |
3165 | ||
3166 | if (cmd->seq_send_order == cmd->seq_count) | |
3167 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3168 | } | |
3169 | cmd->outstanding_r2ts++; | |
3170 | first_r2t = 0; | |
3171 | ||
3172 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3173 | spin_unlock_bh(&cmd->r2t_lock); | |
3174 | return -1; | |
3175 | } | |
3176 | ||
3177 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3178 | break; | |
3179 | } | |
3180 | spin_unlock_bh(&cmd->r2t_lock); | |
3181 | ||
3182 | return 0; | |
3183 | } | |
3184 | ||
2ec5a8c1 NB |
3185 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3186 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3187 | { |
2ec5a8c1 | 3188 | if (inc_stat_sn) |
e48354ce NB |
3189 | cmd->stat_sn = conn->stat_sn++; |
3190 | ||
04f3b31b | 3191 | atomic_long_inc(&conn->sess->rsp_pdus); |
e48354ce | 3192 | |
e48354ce NB |
3193 | memset(hdr, 0, ISCSI_HDR_LEN); |
3194 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3195 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3196 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3197 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3198 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3199 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3200 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3201 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3202 | } |
3203 | hdr->response = cmd->iscsi_response; | |
3204 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3205 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3206 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3207 | ||
3208 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3209 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3210 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3211 | ||
2ec5a8c1 NB |
3212 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3213 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3214 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3215 | cmd->se_cmd.scsi_status, conn->cid); | |
3216 | } | |
3217 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3218 | ||
3219 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3220 | { | |
3221 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
3222 | struct kvec *iov; | |
3223 | u32 padding = 0, tx_size = 0; | |
3224 | int iov_count = 0; | |
3225 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); | |
3226 | ||
3227 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3228 | ||
e48354ce NB |
3229 | iov = &cmd->iov_misc[0]; |
3230 | iov[iov_count].iov_base = cmd->pdu; | |
3231 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3232 | tx_size += ISCSI_HDR_LEN; | |
3233 | ||
3234 | /* | |
3235 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3236 | */ | |
3237 | if (cmd->se_cmd.sense_buffer && | |
3238 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3239 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3240 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3241 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3242 | ||
e48354ce | 3243 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3244 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
9c58b7dd | 3245 | iov[iov_count].iov_base = cmd->sense_buffer; |
e48354ce NB |
3246 | iov[iov_count++].iov_len = |
3247 | (cmd->se_cmd.scsi_sense_length + padding); | |
3248 | tx_size += cmd->se_cmd.scsi_sense_length; | |
3249 | ||
3250 | if (padding) { | |
9c58b7dd | 3251 | memset(cmd->sense_buffer + |
e48354ce NB |
3252 | cmd->se_cmd.scsi_sense_length, 0, padding); |
3253 | tx_size += padding; | |
3254 | pr_debug("Adding %u bytes of padding to" | |
3255 | " SENSE.\n", padding); | |
3256 | } | |
3257 | ||
3258 | if (conn->conn_ops->DataDigest) { | |
3259 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
9c58b7dd | 3260 | cmd->sense_buffer, |
e48354ce NB |
3261 | (cmd->se_cmd.scsi_sense_length + padding), |
3262 | 0, NULL, (u8 *)&cmd->data_crc); | |
3263 | ||
3264 | iov[iov_count].iov_base = &cmd->data_crc; | |
3265 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3266 | tx_size += ISCSI_CRC_LEN; | |
3267 | ||
3268 | pr_debug("Attaching CRC32 DataDigest for" | |
3269 | " SENSE, %u bytes CRC 0x%08x\n", | |
3270 | (cmd->se_cmd.scsi_sense_length + padding), | |
3271 | cmd->data_crc); | |
3272 | } | |
3273 | ||
3274 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" | |
3275 | " Response PDU\n", | |
3276 | cmd->se_cmd.scsi_sense_length); | |
3277 | } | |
3278 | ||
3279 | if (conn->conn_ops->HeaderDigest) { | |
3280 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3281 | ||
80690fdb GU |
3282 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, |
3283 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3284 | |
3285 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3286 | tx_size += ISCSI_CRC_LEN; | |
3287 | pr_debug("Attaching CRC32 HeaderDigest for Response" | |
3288 | " PDU 0x%08x\n", *header_digest); | |
3289 | } | |
3290 | ||
3291 | cmd->iov_misc_count = iov_count; | |
3292 | cmd->tx_size = tx_size; | |
3293 | ||
e48354ce NB |
3294 | return 0; |
3295 | } | |
3296 | ||
3297 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3298 | { | |
3299 | switch (se_tmr->response) { | |
3300 | case TMR_FUNCTION_COMPLETE: | |
3301 | return ISCSI_TMF_RSP_COMPLETE; | |
3302 | case TMR_TASK_DOES_NOT_EXIST: | |
3303 | return ISCSI_TMF_RSP_NO_TASK; | |
3304 | case TMR_LUN_DOES_NOT_EXIST: | |
3305 | return ISCSI_TMF_RSP_NO_LUN; | |
3306 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3307 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
e48354ce NB |
3308 | case TMR_FUNCTION_REJECTED: |
3309 | default: | |
3310 | return ISCSI_TMF_RSP_REJECTED; | |
3311 | } | |
3312 | } | |
3313 | ||
2ec5a8c1 NB |
3314 | void |
3315 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3316 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3317 | { |
3318 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3319 | |
e48354ce | 3320 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3321 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3322 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3323 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3324 | cmd->stat_sn = conn->stat_sn++; |
3325 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3326 | ||
3327 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3328 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3329 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3330 | ||
2ec5a8c1 NB |
3331 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3332 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3333 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3334 | } | |
3335 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3336 | ||
3337 | static int | |
3338 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3339 | { | |
3340 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
3341 | u32 tx_size = 0; | |
3342 | ||
3343 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3344 | ||
e48354ce NB |
3345 | cmd->iov_misc[0].iov_base = cmd->pdu; |
3346 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3347 | tx_size += ISCSI_HDR_LEN; | |
3348 | ||
3349 | if (conn->conn_ops->HeaderDigest) { | |
3350 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3351 | ||
80690fdb GU |
3352 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3353 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3354 | |
3355 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3356 | tx_size += ISCSI_CRC_LEN; | |
3357 | pr_debug("Attaching CRC32 HeaderDigest for Task" | |
3358 | " Mgmt Response PDU 0x%08x\n", *header_digest); | |
3359 | } | |
3360 | ||
3361 | cmd->iov_misc_count = 1; | |
3362 | cmd->tx_size = tx_size; | |
3363 | ||
e48354ce NB |
3364 | return 0; |
3365 | } | |
3366 | ||
2f9bc894 NB |
3367 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3368 | { | |
3369 | bool ret = false; | |
3370 | ||
3371 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3372 | const struct sockaddr_in6 sin6 = { | |
3373 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3374 | struct sockaddr_in6 *sock_in6 = | |
3375 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3376 | ||
3377 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3378 | sin6.sin6_addr.s6_addr, 16)) | |
3379 | ret = true; | |
3380 | } else { | |
3381 | struct sockaddr_in * sock_in = | |
3382 | (struct sockaddr_in *)&np->np_sockaddr; | |
3383 | ||
cea0b4ce | 3384 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3385 | ret = true; |
3386 | } | |
3387 | ||
3388 | return ret; | |
3389 | } | |
3390 | ||
8b1e1244 AG |
3391 | #define SENDTARGETS_BUF_LIMIT 32768U |
3392 | ||
22c7aaa5 SG |
3393 | static int |
3394 | iscsit_build_sendtargets_response(struct iscsi_cmd *cmd, | |
3395 | enum iscsit_transport_type network_transport) | |
e48354ce NB |
3396 | { |
3397 | char *payload = NULL; | |
3398 | struct iscsi_conn *conn = cmd->conn; | |
3399 | struct iscsi_portal_group *tpg; | |
3400 | struct iscsi_tiqn *tiqn; | |
3401 | struct iscsi_tpg_np *tpg_np; | |
3402 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
2dd1d53f | 3403 | int target_name_printed; |
8b1e1244 | 3404 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
6665889c | 3405 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; |
e48354ce | 3406 | |
8b1e1244 AG |
3407 | buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, |
3408 | SENDTARGETS_BUF_LIMIT); | |
e48354ce NB |
3409 | |
3410 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3411 | if (!payload) { | |
3412 | pr_err("Unable to allocate memory for sendtargets" | |
3413 | " response.\n"); | |
3414 | return -ENOMEM; | |
3415 | } | |
6665889c NB |
3416 | /* |
3417 | * Locate pointer to iqn./eui. string for IFC_SENDTARGETS_SINGLE | |
3418 | * explicit case.. | |
3419 | */ | |
3420 | if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) { | |
3421 | text_ptr = strchr(text_in, '='); | |
3422 | if (!text_ptr) { | |
3423 | pr_err("Unable to locate '=' string in text_in:" | |
3424 | " %s\n", text_in); | |
4f45d320 | 3425 | kfree(payload); |
6665889c NB |
3426 | return -EINVAL; |
3427 | } | |
3428 | /* | |
3429 | * Skip over '=' character.. | |
3430 | */ | |
3431 | text_ptr += 1; | |
3432 | } | |
e48354ce NB |
3433 | |
3434 | spin_lock(&tiqn_lock); | |
3435 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
6665889c NB |
3436 | if ((cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) && |
3437 | strcmp(tiqn->tiqn, text_ptr)) { | |
3438 | continue; | |
3439 | } | |
3440 | ||
2dd1d53f | 3441 | target_name_printed = 0; |
e48354ce NB |
3442 | |
3443 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3444 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3445 | ||
2dd1d53f TG |
3446 | /* If demo_mode_discovery=0 and generate_node_acls=0 |
3447 | * (demo mode dislabed) do not return | |
3448 | * TargetName+TargetAddress unless a NodeACL exists. | |
3449 | */ | |
3450 | ||
3451 | if ((tpg->tpg_attrib.generate_node_acls == 0) && | |
3452 | (tpg->tpg_attrib.demo_mode_discovery == 0) && | |
3453 | (!core_tpg_get_initiator_node_acl(&tpg->tpg_se_tpg, | |
3454 | cmd->conn->sess->sess_ops->InitiatorName))) { | |
3455 | continue; | |
3456 | } | |
3457 | ||
e48354ce NB |
3458 | spin_lock(&tpg->tpg_state_lock); |
3459 | if ((tpg->tpg_state == TPG_STATE_FREE) || | |
3460 | (tpg->tpg_state == TPG_STATE_INACTIVE)) { | |
3461 | spin_unlock(&tpg->tpg_state_lock); | |
3462 | continue; | |
3463 | } | |
3464 | spin_unlock(&tpg->tpg_state_lock); | |
3465 | ||
3466 | spin_lock(&tpg->tpg_np_lock); | |
3467 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3468 | tpg_np_list) { | |
2f9bc894 NB |
3469 | struct iscsi_np *np = tpg_np->tpg_np; |
3470 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
3471 | ||
22c7aaa5 SG |
3472 | if (np->np_network_transport != network_transport) |
3473 | continue; | |
3474 | ||
2dd1d53f TG |
3475 | if (!target_name_printed) { |
3476 | len = sprintf(buf, "TargetName=%s", | |
3477 | tiqn->tiqn); | |
3478 | len += 1; | |
3479 | ||
3480 | if ((len + payload_len) > buffer_len) { | |
3481 | spin_unlock(&tpg->tpg_np_lock); | |
3482 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3483 | end_of_buf = 1; | |
3484 | goto eob; | |
3485 | } | |
3486 | memcpy(payload + payload_len, buf, len); | |
3487 | payload_len += len; | |
3488 | target_name_printed = 1; | |
3489 | } | |
3490 | ||
e48354ce | 3491 | len = sprintf(buf, "TargetAddress=" |
dfecf611 | 3492 | "%s:%hu,%hu", |
0bcc297e | 3493 | inaddr_any ? conn->local_ip : np->np_ip, |
f2774f43 | 3494 | np->np_port, |
e48354ce NB |
3495 | tpg->tpgt); |
3496 | len += 1; | |
3497 | ||
3498 | if ((len + payload_len) > buffer_len) { | |
3499 | spin_unlock(&tpg->tpg_np_lock); | |
3500 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3501 | end_of_buf = 1; | |
3502 | goto eob; | |
3503 | } | |
8359cf43 | 3504 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3505 | payload_len += len; |
3506 | } | |
3507 | spin_unlock(&tpg->tpg_np_lock); | |
3508 | } | |
3509 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3510 | eob: | |
3511 | if (end_of_buf) | |
3512 | break; | |
6665889c NB |
3513 | |
3514 | if (cmd->cmd_flags & IFC_SENDTARGETS_SINGLE) | |
3515 | break; | |
e48354ce NB |
3516 | } |
3517 | spin_unlock(&tiqn_lock); | |
3518 | ||
3519 | cmd->buf_ptr = payload; | |
3520 | ||
3521 | return payload_len; | |
3522 | } | |
3523 | ||
889c8a68 NB |
3524 | int |
3525 | iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
22c7aaa5 SG |
3526 | struct iscsi_text_rsp *hdr, |
3527 | enum iscsit_transport_type network_transport) | |
e48354ce | 3528 | { |
889c8a68 | 3529 | int text_length, padding; |
e48354ce | 3530 | |
22c7aaa5 | 3531 | text_length = iscsit_build_sendtargets_response(cmd, network_transport); |
e48354ce NB |
3532 | if (text_length < 0) |
3533 | return text_length; | |
3534 | ||
889c8a68 NB |
3535 | hdr->opcode = ISCSI_OP_TEXT_RSP; |
3536 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
e48354ce | 3537 | padding = ((-text_length) & 3); |
e48354ce | 3538 | hton24(hdr->dlength, text_length); |
889c8a68 NB |
3539 | hdr->itt = cmd->init_task_tag; |
3540 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3541 | cmd->stat_sn = conn->stat_sn++; | |
3542 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
e48354ce NB |
3543 | |
3544 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
889c8a68 NB |
3545 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
3546 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
e48354ce | 3547 | |
889c8a68 NB |
3548 | pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," |
3549 | " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, | |
3550 | text_length, conn->cid); | |
3551 | ||
3552 | return text_length + padding; | |
3553 | } | |
3554 | EXPORT_SYMBOL(iscsit_build_text_rsp); | |
e48354ce | 3555 | |
889c8a68 NB |
3556 | /* |
3557 | * FIXME: Add support for F_BIT and C_BIT when the length is longer than | |
3558 | * MaxRecvDataSegmentLength. | |
3559 | */ | |
3560 | static int iscsit_send_text_rsp( | |
3561 | struct iscsi_cmd *cmd, | |
3562 | struct iscsi_conn *conn) | |
3563 | { | |
3564 | struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; | |
3565 | struct kvec *iov; | |
3566 | u32 tx_size = 0; | |
3567 | int text_length, iov_count = 0, rc; | |
3568 | ||
22c7aaa5 | 3569 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_TCP); |
889c8a68 NB |
3570 | if (rc < 0) |
3571 | return rc; | |
3572 | ||
3573 | text_length = rc; | |
3574 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3575 | iov[iov_count].iov_base = cmd->pdu; |
3576 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3577 | iov[iov_count].iov_base = cmd->buf_ptr; | |
889c8a68 | 3578 | iov[iov_count++].iov_len = text_length; |
e48354ce | 3579 | |
889c8a68 | 3580 | tx_size += (ISCSI_HDR_LEN + text_length); |
e48354ce NB |
3581 | |
3582 | if (conn->conn_ops->HeaderDigest) { | |
3583 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3584 | ||
80690fdb GU |
3585 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3586 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3587 | |
3588 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3589 | tx_size += ISCSI_CRC_LEN; | |
3590 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3591 | " Text Response PDU 0x%08x\n", *header_digest); | |
3592 | } | |
3593 | ||
3594 | if (conn->conn_ops->DataDigest) { | |
3595 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
889c8a68 | 3596 | cmd->buf_ptr, text_length, |
e48354ce NB |
3597 | 0, NULL, (u8 *)&cmd->data_crc); |
3598 | ||
3599 | iov[iov_count].iov_base = &cmd->data_crc; | |
3600 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3601 | tx_size += ISCSI_CRC_LEN; | |
3602 | ||
3603 | pr_debug("Attaching DataDigest for %u bytes of text" | |
889c8a68 | 3604 | " data, CRC 0x%08x\n", text_length, |
e48354ce NB |
3605 | cmd->data_crc); |
3606 | } | |
3607 | ||
3608 | cmd->iov_misc_count = iov_count; | |
3609 | cmd->tx_size = tx_size; | |
3610 | ||
e48354ce NB |
3611 | return 0; |
3612 | } | |
3613 | ||
2ec5a8c1 NB |
3614 | void |
3615 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3616 | struct iscsi_reject *hdr) | |
3617 | { | |
3618 | hdr->opcode = ISCSI_OP_REJECT; | |
ba159914 | 3619 | hdr->reason = cmd->reject_reason; |
2ec5a8c1 NB |
3620 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
3621 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3622 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3623 | cmd->stat_sn = conn->stat_sn++; | |
3624 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3625 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3626 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3627 | ||
3628 | } | |
3629 | EXPORT_SYMBOL(iscsit_build_reject); | |
3630 | ||
e48354ce NB |
3631 | static int iscsit_send_reject( |
3632 | struct iscsi_cmd *cmd, | |
3633 | struct iscsi_conn *conn) | |
3634 | { | |
bfbdb31d | 3635 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3636 | struct kvec *iov; |
bfbdb31d | 3637 | u32 iov_count = 0, tx_size; |
e48354ce | 3638 | |
bfbdb31d | 3639 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce NB |
3640 | |
3641 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3642 | iov[iov_count].iov_base = cmd->pdu; |
3643 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3644 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3645 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3646 | ||
3647 | tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); | |
3648 | ||
3649 | if (conn->conn_ops->HeaderDigest) { | |
3650 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3651 | ||
80690fdb GU |
3652 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3653 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3654 | |
3655 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3656 | tx_size += ISCSI_CRC_LEN; | |
3657 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3658 | " REJECT PDU 0x%08x\n", *header_digest); | |
3659 | } | |
3660 | ||
3661 | if (conn->conn_ops->DataDigest) { | |
80690fdb GU |
3662 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->buf_ptr, |
3663 | ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc); | |
e48354ce NB |
3664 | |
3665 | iov[iov_count].iov_base = &cmd->data_crc; | |
3666 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3667 | tx_size += ISCSI_CRC_LEN; | |
3668 | pr_debug("Attaching CRC32 DataDigest for REJECT" | |
3669 | " PDU 0x%08x\n", cmd->data_crc); | |
3670 | } | |
3671 | ||
3672 | cmd->iov_misc_count = iov_count; | |
3673 | cmd->tx_size = tx_size; | |
3674 | ||
3675 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," | |
3676 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3677 | ||
3678 | return 0; | |
3679 | } | |
3680 | ||
e48354ce NB |
3681 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3682 | { | |
3683 | struct iscsi_thread_set *ts = conn->thread_set; | |
3684 | int ord, cpu; | |
3685 | /* | |
3686 | * thread_id is assigned from iscsit_global->ts_bitmap from | |
3687 | * within iscsi_thread_set.c:iscsi_allocate_thread_sets() | |
3688 | * | |
3689 | * Here we use thread_id to determine which CPU that this | |
3690 | * iSCSI connection's iscsi_thread_set will be scheduled to | |
3691 | * execute upon. | |
3692 | */ | |
3693 | ord = ts->thread_id % cpumask_weight(cpu_online_mask); | |
e48354ce NB |
3694 | for_each_online_cpu(cpu) { |
3695 | if (ord-- == 0) { | |
3696 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3697 | return; | |
3698 | } | |
3699 | } | |
3700 | /* | |
3701 | * This should never be reached.. | |
3702 | */ | |
3703 | dump_stack(); | |
3704 | cpumask_setall(conn->conn_cpumask); | |
3705 | } | |
3706 | ||
3707 | static inline void iscsit_thread_check_cpumask( | |
3708 | struct iscsi_conn *conn, | |
3709 | struct task_struct *p, | |
3710 | int mode) | |
3711 | { | |
e48354ce NB |
3712 | /* |
3713 | * mode == 1 signals iscsi_target_tx_thread() usage. | |
3714 | * mode == 0 signals iscsi_target_rx_thread() usage. | |
3715 | */ | |
3716 | if (mode == 1) { | |
3717 | if (!conn->conn_tx_reset_cpumask) | |
3718 | return; | |
3719 | conn->conn_tx_reset_cpumask = 0; | |
3720 | } else { | |
3721 | if (!conn->conn_rx_reset_cpumask) | |
3722 | return; | |
3723 | conn->conn_rx_reset_cpumask = 0; | |
3724 | } | |
3725 | /* | |
3726 | * Update the CPU mask for this single kthread so that | |
3727 | * both TX and RX kthreads are scheduled to run on the | |
3728 | * same CPU. | |
3729 | */ | |
e48354ce NB |
3730 | set_cpus_allowed_ptr(p, conn->conn_cpumask); |
3731 | } | |
3732 | ||
2ec5a8c1 NB |
3733 | static int |
3734 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
e48354ce | 3735 | { |
6f3c0e69 AG |
3736 | int ret; |
3737 | ||
2ec5a8c1 NB |
3738 | switch (state) { |
3739 | case ISTATE_SEND_R2T: | |
3740 | ret = iscsit_send_r2t(cmd, conn); | |
3741 | if (ret < 0) | |
3742 | goto err; | |
3743 | break; | |
3744 | case ISTATE_REMOVE: | |
3745 | spin_lock_bh(&conn->cmd_lock); | |
5159d763 | 3746 | list_del_init(&cmd->i_conn_node); |
2ec5a8c1 | 3747 | spin_unlock_bh(&conn->cmd_lock); |
6f3c0e69 | 3748 | |
aafc9d15 | 3749 | iscsit_free_cmd(cmd, false); |
2ec5a8c1 NB |
3750 | break; |
3751 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3752 | iscsit_mod_nopin_response_timer(conn); | |
3753 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3754 | if (ret < 0) | |
6f3c0e69 | 3755 | goto err; |
2ec5a8c1 NB |
3756 | break; |
3757 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3758 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3759 | if (ret < 0) | |
3760 | goto err; | |
3761 | break; | |
3762 | default: | |
3763 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3764 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3765 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3766 | conn->cid); | |
3767 | goto err; | |
6f3c0e69 AG |
3768 | } |
3769 | ||
3770 | return 0; | |
3771 | ||
3772 | err: | |
3773 | return -1; | |
3774 | } | |
3775 | ||
2ec5a8c1 NB |
3776 | static int |
3777 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3778 | { |
2ec5a8c1 | 3779 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3780 | struct iscsi_queue_req *qr; |
3781 | struct iscsi_cmd *cmd; | |
3782 | u8 state; | |
3783 | int ret; | |
3784 | ||
2ec5a8c1 NB |
3785 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3786 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3787 | cmd = qr->cmd; |
3788 | state = qr->state; | |
3789 | kmem_cache_free(lio_qr_cache, qr); | |
3790 | ||
2ec5a8c1 NB |
3791 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3792 | if (ret < 0) | |
3793 | return ret; | |
3794 | } | |
fd3a9025 | 3795 | |
2ec5a8c1 NB |
3796 | return 0; |
3797 | } | |
6f3c0e69 | 3798 | |
2ec5a8c1 NB |
3799 | static int |
3800 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
3801 | { | |
3802 | int ret; | |
3803 | ||
3804 | check_rsp_state: | |
3805 | switch (state) { | |
3806 | case ISTATE_SEND_DATAIN: | |
3807 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3808 | if (ret < 0) |
3809 | goto err; | |
2ec5a8c1 NB |
3810 | else if (!ret) |
3811 | /* more drs */ | |
3812 | goto check_rsp_state; | |
3813 | else if (ret == 1) { | |
3814 | /* all done */ | |
3815 | spin_lock_bh(&cmd->istate_lock); | |
3816 | cmd->i_state = ISTATE_SENT_STATUS; | |
3817 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3818 | |
2ec5a8c1 NB |
3819 | if (atomic_read(&conn->check_immediate_queue)) |
3820 | return 1; | |
6f3c0e69 | 3821 | |
2ec5a8c1 NB |
3822 | return 0; |
3823 | } else if (ret == 2) { | |
3824 | /* Still must send status, | |
3825 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3826 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3827 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3828 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3829 | state = ISTATE_SEND_STATUS; |
3830 | goto check_rsp_state; | |
3831 | } | |
3832 | ||
3833 | break; | |
3834 | case ISTATE_SEND_STATUS: | |
3835 | case ISTATE_SEND_STATUS_RECOVERY: | |
3836 | ret = iscsit_send_response(cmd, conn); | |
3837 | break; | |
3838 | case ISTATE_SEND_LOGOUTRSP: | |
3839 | ret = iscsit_send_logout(cmd, conn); | |
3840 | break; | |
3841 | case ISTATE_SEND_ASYNCMSG: | |
3842 | ret = iscsit_send_conn_drop_async_message( | |
3843 | cmd, conn); | |
3844 | break; | |
3845 | case ISTATE_SEND_NOPIN: | |
3846 | ret = iscsit_send_nopin(cmd, conn); | |
3847 | break; | |
3848 | case ISTATE_SEND_REJECT: | |
3849 | ret = iscsit_send_reject(cmd, conn); | |
3850 | break; | |
3851 | case ISTATE_SEND_TASKMGTRSP: | |
3852 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3853 | if (ret != 0) | |
6f3c0e69 | 3854 | break; |
2ec5a8c1 NB |
3855 | ret = iscsit_tmr_post_handler(cmd, conn); |
3856 | if (ret != 0) | |
3857 | iscsit_fall_back_to_erl0(conn->sess); | |
3858 | break; | |
3859 | case ISTATE_SEND_TEXTRSP: | |
3860 | ret = iscsit_send_text_rsp(cmd, conn); | |
3861 | break; | |
3862 | default: | |
3863 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3864 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3865 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3866 | state, conn->cid); | |
3867 | goto err; | |
3868 | } | |
3869 | if (ret < 0) | |
3870 | goto err; | |
3871 | ||
3872 | if (iscsit_send_tx_data(cmd, conn, 1) < 0) { | |
3873 | iscsit_tx_thread_wait_for_tcp(conn); | |
3874 | iscsit_unmap_iovec(cmd); | |
3875 | goto err; | |
3876 | } | |
3877 | iscsit_unmap_iovec(cmd); | |
3878 | ||
3879 | switch (state) { | |
3880 | case ISTATE_SEND_LOGOUTRSP: | |
3881 | if (!iscsit_logout_post_handler(cmd, conn)) | |
3882 | goto restart; | |
3883 | /* fall through */ | |
3884 | case ISTATE_SEND_STATUS: | |
3885 | case ISTATE_SEND_ASYNCMSG: | |
3886 | case ISTATE_SEND_NOPIN: | |
3887 | case ISTATE_SEND_STATUS_RECOVERY: | |
3888 | case ISTATE_SEND_TEXTRSP: | |
3889 | case ISTATE_SEND_TASKMGTRSP: | |
ba159914 | 3890 | case ISTATE_SEND_REJECT: |
2ec5a8c1 NB |
3891 | spin_lock_bh(&cmd->istate_lock); |
3892 | cmd->i_state = ISTATE_SENT_STATUS; | |
3893 | spin_unlock_bh(&cmd->istate_lock); | |
3894 | break; | |
2ec5a8c1 NB |
3895 | default: |
3896 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3897 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3898 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3899 | cmd->i_state, conn->cid); | |
3900 | goto err; | |
6f3c0e69 AG |
3901 | } |
3902 | ||
2ec5a8c1 NB |
3903 | if (atomic_read(&conn->check_immediate_queue)) |
3904 | return 1; | |
3905 | ||
6f3c0e69 AG |
3906 | return 0; |
3907 | ||
3908 | err: | |
3909 | return -1; | |
3910 | restart: | |
3911 | return -EAGAIN; | |
3912 | } | |
3913 | ||
2ec5a8c1 NB |
3914 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3915 | { | |
3916 | struct iscsit_transport *t = conn->conn_transport; | |
3917 | struct iscsi_queue_req *qr; | |
3918 | struct iscsi_cmd *cmd; | |
3919 | u8 state; | |
3920 | int ret; | |
3921 | ||
3922 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3923 | cmd = qr->cmd; | |
3924 | state = qr->state; | |
3925 | kmem_cache_free(lio_qr_cache, qr); | |
3926 | ||
3927 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3928 | if (ret == 1 || ret < 0) | |
3929 | return ret; | |
3930 | } | |
3931 | ||
3932 | return 0; | |
3933 | } | |
3934 | ||
6f3c0e69 AG |
3935 | int iscsi_target_tx_thread(void *arg) |
3936 | { | |
e48354ce | 3937 | int ret = 0; |
e48354ce | 3938 | struct iscsi_conn *conn; |
8359cf43 | 3939 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3940 | /* |
3941 | * Allow ourselves to be interrupted by SIGINT so that a | |
3942 | * connection recovery / failure event can be triggered externally. | |
3943 | */ | |
3944 | allow_signal(SIGINT); | |
3945 | ||
3946 | restart: | |
3947 | conn = iscsi_tx_thread_pre_handler(ts); | |
3948 | if (!conn) | |
3949 | goto out; | |
3950 | ||
6f3c0e69 | 3951 | ret = 0; |
e48354ce NB |
3952 | |
3953 | while (!kthread_should_stop()) { | |
3954 | /* | |
3955 | * Ensure that both TX and RX per connection kthreads | |
3956 | * are scheduled to run on the same CPU. | |
3957 | */ | |
3958 | iscsit_thread_check_cpumask(conn, current, 1); | |
3959 | ||
d5627acb RD |
3960 | wait_event_interruptible(conn->queues_wq, |
3961 | !iscsit_conn_all_queues_empty(conn) || | |
3962 | ts->status == ISCSI_THREAD_SET_RESET); | |
e48354ce NB |
3963 | |
3964 | if ((ts->status == ISCSI_THREAD_SET_RESET) || | |
3965 | signal_pending(current)) | |
3966 | goto transport_err; | |
3967 | ||
fd3a9025 | 3968 | get_immediate: |
2ec5a8c1 | 3969 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3970 | if (ret < 0) |
3971 | goto transport_err; | |
e48354ce | 3972 | |
2ec5a8c1 | 3973 | ret = iscsit_handle_response_queue(conn); |
fd3a9025 NB |
3974 | if (ret == 1) |
3975 | goto get_immediate; | |
3976 | else if (ret == -EAGAIN) | |
6f3c0e69 AG |
3977 | goto restart; |
3978 | else if (ret < 0) | |
3979 | goto transport_err; | |
e48354ce NB |
3980 | } |
3981 | ||
3982 | transport_err: | |
3983 | iscsit_take_action_for_connection_exit(conn); | |
3984 | goto restart; | |
3985 | out: | |
3986 | return 0; | |
3987 | } | |
3988 | ||
3e1c81a9 NB |
3989 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
3990 | { | |
3991 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
3992 | struct iscsi_cmd *cmd; | |
3993 | int ret = 0; | |
3994 | ||
3995 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
3996 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 3997 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3998 | if (!cmd) |
ba159914 | 3999 | goto reject; |
3e1c81a9 NB |
4000 | |
4001 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
4002 | break; | |
4003 | case ISCSI_OP_SCSI_DATA_OUT: | |
4004 | ret = iscsit_handle_data_out(conn, buf); | |
4005 | break; | |
4006 | case ISCSI_OP_NOOP_OUT: | |
4007 | cmd = NULL; | |
4008 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
676687c6 | 4009 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4010 | if (!cmd) |
ba159914 | 4011 | goto reject; |
3e1c81a9 NB |
4012 | } |
4013 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
4014 | break; | |
4015 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 4016 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4017 | if (!cmd) |
ba159914 | 4018 | goto reject; |
3e1c81a9 NB |
4019 | |
4020 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
4021 | break; | |
4022 | case ISCSI_OP_TEXT: | |
676687c6 | 4023 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
64534aa7 | 4024 | if (!cmd) |
ba159914 | 4025 | goto reject; |
64534aa7 NB |
4026 | |
4027 | ret = iscsit_handle_text_cmd(conn, cmd, buf); | |
3e1c81a9 NB |
4028 | break; |
4029 | case ISCSI_OP_LOGOUT: | |
676687c6 | 4030 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4031 | if (!cmd) |
ba159914 | 4032 | goto reject; |
3e1c81a9 NB |
4033 | |
4034 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
4035 | if (ret > 0) | |
4036 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
4037 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
4038 | break; | |
4039 | case ISCSI_OP_SNACK: | |
4040 | ret = iscsit_handle_snack(conn, buf); | |
4041 | break; | |
4042 | default: | |
4043 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
4044 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
4045 | pr_err("Cannot recover from unknown" | |
4046 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
4047 | return -1; | |
4048 | } | |
4049 | if (!conn->conn_ops->OFMarker) { | |
4050 | pr_err("Unable to recover from unknown" | |
4051 | " opcode while OFMarker=No, closing iSCSI" | |
4052 | " connection.\n"); | |
4053 | return -1; | |
4054 | } | |
4055 | if (iscsit_recover_from_unknown_opcode(conn) < 0) { | |
4056 | pr_err("Unable to recover from unknown" | |
4057 | " opcode, closing iSCSI connection.\n"); | |
4058 | return -1; | |
4059 | } | |
4060 | break; | |
4061 | } | |
4062 | ||
4063 | return ret; | |
ba159914 NB |
4064 | reject: |
4065 | return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
4066 | } |
4067 | ||
e48354ce NB |
4068 | int iscsi_target_rx_thread(void *arg) |
4069 | { | |
4070 | int ret; | |
4071 | u8 buffer[ISCSI_HDR_LEN], opcode; | |
4072 | u32 checksum = 0, digest = 0; | |
4073 | struct iscsi_conn *conn = NULL; | |
8359cf43 | 4074 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
4075 | struct kvec iov; |
4076 | /* | |
4077 | * Allow ourselves to be interrupted by SIGINT so that a | |
4078 | * connection recovery / failure event can be triggered externally. | |
4079 | */ | |
4080 | allow_signal(SIGINT); | |
4081 | ||
4082 | restart: | |
4083 | conn = iscsi_rx_thread_pre_handler(ts); | |
4084 | if (!conn) | |
4085 | goto out; | |
4086 | ||
3e1c81a9 NB |
4087 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) { |
4088 | struct completion comp; | |
4089 | int rc; | |
4090 | ||
4091 | init_completion(&comp); | |
4092 | rc = wait_for_completion_interruptible(&comp); | |
4093 | if (rc < 0) | |
4094 | goto transport_err; | |
4095 | ||
4096 | goto out; | |
4097 | } | |
4098 | ||
e48354ce NB |
4099 | while (!kthread_should_stop()) { |
4100 | /* | |
4101 | * Ensure that both TX and RX per connection kthreads | |
4102 | * are scheduled to run on the same CPU. | |
4103 | */ | |
4104 | iscsit_thread_check_cpumask(conn, current, 0); | |
4105 | ||
4106 | memset(buffer, 0, ISCSI_HDR_LEN); | |
4107 | memset(&iov, 0, sizeof(struct kvec)); | |
4108 | ||
4109 | iov.iov_base = buffer; | |
4110 | iov.iov_len = ISCSI_HDR_LEN; | |
4111 | ||
4112 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
4113 | if (ret != ISCSI_HDR_LEN) { | |
4114 | iscsit_rx_thread_wait_for_tcp(conn); | |
4115 | goto transport_err; | |
4116 | } | |
4117 | ||
e48354ce NB |
4118 | if (conn->conn_ops->HeaderDigest) { |
4119 | iov.iov_base = &digest; | |
4120 | iov.iov_len = ISCSI_CRC_LEN; | |
4121 | ||
4122 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
4123 | if (ret != ISCSI_CRC_LEN) { | |
4124 | iscsit_rx_thread_wait_for_tcp(conn); | |
4125 | goto transport_err; | |
4126 | } | |
4127 | ||
4128 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
4129 | buffer, ISCSI_HDR_LEN, | |
4130 | 0, NULL, (u8 *)&checksum); | |
4131 | ||
4132 | if (digest != checksum) { | |
4133 | pr_err("HeaderDigest CRC32C failed," | |
4134 | " received 0x%08x, computed 0x%08x\n", | |
4135 | digest, checksum); | |
4136 | /* | |
4137 | * Set the PDU to 0xff so it will intentionally | |
4138 | * hit default in the switch below. | |
4139 | */ | |
4140 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
04f3b31b | 4141 | atomic_long_inc(&conn->sess->conn_digest_errors); |
e48354ce NB |
4142 | } else { |
4143 | pr_debug("Got HeaderDigest CRC32C" | |
4144 | " 0x%08x\n", checksum); | |
4145 | } | |
4146 | } | |
4147 | ||
4148 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
4149 | goto transport_err; | |
4150 | ||
4151 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
4152 | ||
4153 | if (conn->sess->sess_ops->SessionType && | |
4154 | ((!(opcode & ISCSI_OP_TEXT)) || | |
4155 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
4156 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
4157 | " while in Discovery Session, rejecting.\n", opcode); | |
ba159914 NB |
4158 | iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
4159 | buffer); | |
e48354ce NB |
4160 | goto transport_err; |
4161 | } | |
4162 | ||
3e1c81a9 NB |
4163 | ret = iscsi_target_rx_opcode(conn, buffer); |
4164 | if (ret < 0) | |
4165 | goto transport_err; | |
e48354ce NB |
4166 | } |
4167 | ||
4168 | transport_err: | |
4169 | if (!signal_pending(current)) | |
4170 | atomic_set(&conn->transport_failed, 1); | |
4171 | iscsit_take_action_for_connection_exit(conn); | |
4172 | goto restart; | |
4173 | out: | |
4174 | return 0; | |
4175 | } | |
4176 | ||
4177 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4178 | { | |
4179 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; | |
4180 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4181 | /* |
4182 | * We expect this function to only ever be called from either RX or TX | |
4183 | * thread context via iscsit_close_connection() once the other context | |
4184 | * has been reset -> returned sleeping pre-handler state. | |
4185 | */ | |
4186 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4187 | list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { |
e48354ce | 4188 | |
5159d763 | 4189 | list_del_init(&cmd->i_conn_node); |
e48354ce NB |
4190 | spin_unlock_bh(&conn->cmd_lock); |
4191 | ||
4192 | iscsit_increment_maxcmdsn(cmd, sess); | |
e48354ce | 4193 | |
aafc9d15 | 4194 | iscsit_free_cmd(cmd, true); |
e48354ce NB |
4195 | |
4196 | spin_lock_bh(&conn->cmd_lock); | |
4197 | } | |
4198 | spin_unlock_bh(&conn->cmd_lock); | |
4199 | } | |
4200 | ||
4201 | static void iscsit_stop_timers_for_cmds( | |
4202 | struct iscsi_conn *conn) | |
4203 | { | |
4204 | struct iscsi_cmd *cmd; | |
4205 | ||
4206 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4207 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4208 | if (cmd->data_direction == DMA_TO_DEVICE) |
4209 | iscsit_stop_dataout_timer(cmd); | |
4210 | } | |
4211 | spin_unlock_bh(&conn->cmd_lock); | |
4212 | } | |
4213 | ||
4214 | int iscsit_close_connection( | |
4215 | struct iscsi_conn *conn) | |
4216 | { | |
4217 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4218 | struct iscsi_session *sess = conn->sess; | |
4219 | ||
4220 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4221 | " %u\n", conn->cid, sess->sid); | |
4222 | /* | |
4223 | * Always up conn_logout_comp just in case the RX Thread is sleeping | |
4224 | * and the logout response never got sent because the connection | |
4225 | * failed. | |
4226 | */ | |
4227 | complete(&conn->conn_logout_comp); | |
4228 | ||
4229 | iscsi_release_thread_set(conn); | |
4230 | ||
4231 | iscsit_stop_timers_for_cmds(conn); | |
4232 | iscsit_stop_nopin_response_timer(conn); | |
4233 | iscsit_stop_nopin_timer(conn); | |
defd8848 NB |
4234 | |
4235 | if (conn->conn_transport->iscsit_wait_conn) | |
4236 | conn->conn_transport->iscsit_wait_conn(conn); | |
4237 | ||
e48354ce NB |
4238 | /* |
4239 | * During Connection recovery drop unacknowledged out of order | |
4240 | * commands for this connection, and prepare the other commands | |
4241 | * for realligence. | |
4242 | * | |
4243 | * During normal operation clear the out of order commands (but | |
4244 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4245 | * struct iscsi_cmds. | |
4246 | */ | |
4247 | if (atomic_read(&conn->connection_recovery)) { | |
4248 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4249 | iscsit_prepare_cmds_for_realligance(conn); | |
4250 | } else { | |
4251 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4252 | iscsit_release_commands_from_conn(conn); | |
4253 | } | |
bbc05048 | 4254 | iscsit_free_queue_reqs_for_conn(conn); |
e48354ce NB |
4255 | |
4256 | /* | |
4257 | * Handle decrementing session or connection usage count if | |
4258 | * a logout response was not able to be sent because the | |
4259 | * connection failed. Fall back to Session Recovery here. | |
4260 | */ | |
4261 | if (atomic_read(&conn->conn_logout_remove)) { | |
4262 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4263 | iscsit_dec_conn_usage_count(conn); | |
4264 | iscsit_dec_session_usage_count(sess); | |
4265 | } | |
4266 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4267 | iscsit_dec_conn_usage_count(conn); | |
4268 | ||
4269 | atomic_set(&conn->conn_logout_remove, 0); | |
4270 | atomic_set(&sess->session_reinstatement, 0); | |
4271 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4272 | } | |
4273 | ||
4274 | spin_lock_bh(&sess->conn_lock); | |
4275 | list_del(&conn->conn_list); | |
4276 | ||
4277 | /* | |
4278 | * Attempt to let the Initiator know this connection failed by | |
4279 | * sending an Connection Dropped Async Message on another | |
4280 | * active connection. | |
4281 | */ | |
4282 | if (atomic_read(&conn->connection_recovery)) | |
4283 | iscsit_build_conn_drop_async_message(conn); | |
4284 | ||
4285 | spin_unlock_bh(&sess->conn_lock); | |
4286 | ||
4287 | /* | |
4288 | * If connection reinstatement is being performed on this connection, | |
4289 | * up the connection reinstatement semaphore that is being blocked on | |
4290 | * in iscsit_cause_connection_reinstatement(). | |
4291 | */ | |
4292 | spin_lock_bh(&conn->state_lock); | |
4293 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4294 | spin_unlock_bh(&conn->state_lock); | |
4295 | complete(&conn->conn_wait_comp); | |
4296 | wait_for_completion(&conn->conn_post_wait_comp); | |
4297 | spin_lock_bh(&conn->state_lock); | |
4298 | } | |
4299 | ||
4300 | /* | |
4301 | * If connection reinstatement is being performed on this connection | |
4302 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4303 | * connection wait rcfr semaphore that is being blocked on | |
4304 | * an iscsit_connection_reinstatement_rcfr(). | |
4305 | */ | |
4306 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4307 | spin_unlock_bh(&conn->state_lock); | |
4308 | complete(&conn->conn_wait_rcfr_comp); | |
4309 | wait_for_completion(&conn->conn_post_wait_comp); | |
4310 | spin_lock_bh(&conn->state_lock); | |
4311 | } | |
4312 | atomic_set(&conn->connection_reinstatement, 1); | |
4313 | spin_unlock_bh(&conn->state_lock); | |
4314 | ||
4315 | /* | |
4316 | * If any other processes are accessing this connection pointer we | |
4317 | * must wait until they have completed. | |
4318 | */ | |
4319 | iscsit_check_conn_usage_count(conn); | |
4320 | ||
4321 | if (conn->conn_rx_hash.tfm) | |
4322 | crypto_free_hash(conn->conn_rx_hash.tfm); | |
4323 | if (conn->conn_tx_hash.tfm) | |
4324 | crypto_free_hash(conn->conn_tx_hash.tfm); | |
4325 | ||
fbecb659 | 4326 | free_cpumask_var(conn->conn_cpumask); |
e48354ce NB |
4327 | |
4328 | kfree(conn->conn_ops); | |
4329 | conn->conn_ops = NULL; | |
4330 | ||
bf6932f4 | 4331 | if (conn->sock) |
e48354ce | 4332 | sock_release(conn->sock); |
baa4d64b NB |
4333 | |
4334 | if (conn->conn_transport->iscsit_free_conn) | |
4335 | conn->conn_transport->iscsit_free_conn(conn); | |
4336 | ||
4337 | iscsit_put_transport(conn->conn_transport); | |
4338 | ||
e48354ce NB |
4339 | conn->thread_set = NULL; |
4340 | ||
4341 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); | |
4342 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4343 | kfree(conn); | |
4344 | ||
4345 | spin_lock_bh(&sess->conn_lock); | |
4346 | atomic_dec(&sess->nconn); | |
4347 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4348 | " %s\n", atomic_read(&sess->nconn), | |
4349 | sess->sess_ops->InitiatorName); | |
4350 | /* | |
4351 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4352 | * Session that they all fail. | |
4353 | */ | |
4354 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4355 | !atomic_read(&sess->session_logout)) | |
4356 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4357 | ||
4358 | /* | |
4359 | * If this was not the last connection in the session, and we are | |
4360 | * performing session reinstatement or falling back to ERL=0, call | |
4361 | * iscsit_stop_session() without sleeping to shutdown the other | |
4362 | * active connections. | |
4363 | */ | |
4364 | if (atomic_read(&sess->nconn)) { | |
4365 | if (!atomic_read(&sess->session_reinstatement) && | |
4366 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4367 | spin_unlock_bh(&sess->conn_lock); | |
4368 | return 0; | |
4369 | } | |
4370 | if (!atomic_read(&sess->session_stop_active)) { | |
4371 | atomic_set(&sess->session_stop_active, 1); | |
4372 | spin_unlock_bh(&sess->conn_lock); | |
4373 | iscsit_stop_session(sess, 0, 0); | |
4374 | return 0; | |
4375 | } | |
4376 | spin_unlock_bh(&sess->conn_lock); | |
4377 | return 0; | |
4378 | } | |
4379 | ||
4380 | /* | |
4381 | * If this was the last connection in the session and one of the | |
4382 | * following is occurring: | |
4383 | * | |
4384 | * Session Reinstatement is not being performed, and are falling back | |
4385 | * to ERL=0 call iscsit_close_session(). | |
4386 | * | |
4387 | * Session Logout was requested. iscsit_close_session() will be called | |
4388 | * elsewhere. | |
4389 | * | |
4390 | * Session Continuation is not being performed, start the Time2Retain | |
4391 | * handler and check if sleep_on_sess_wait_sem is active. | |
4392 | */ | |
4393 | if (!atomic_read(&sess->session_reinstatement) && | |
4394 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4395 | spin_unlock_bh(&sess->conn_lock); | |
99367f01 | 4396 | target_put_session(sess->se_sess); |
e48354ce NB |
4397 | |
4398 | return 0; | |
4399 | } else if (atomic_read(&sess->session_logout)) { | |
4400 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4401 | sess->session_state = TARG_SESS_STATE_FREE; | |
4402 | spin_unlock_bh(&sess->conn_lock); | |
4403 | ||
4404 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4405 | complete(&sess->session_wait_comp); | |
4406 | ||
4407 | return 0; | |
4408 | } else { | |
4409 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4410 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4411 | ||
4412 | if (!atomic_read(&sess->session_continuation)) { | |
4413 | spin_unlock_bh(&sess->conn_lock); | |
4414 | iscsit_start_time2retain_handler(sess); | |
4415 | } else | |
4416 | spin_unlock_bh(&sess->conn_lock); | |
4417 | ||
4418 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4419 | complete(&sess->session_wait_comp); | |
4420 | ||
4421 | return 0; | |
4422 | } | |
4423 | spin_unlock_bh(&sess->conn_lock); | |
4424 | ||
4425 | return 0; | |
4426 | } | |
4427 | ||
4428 | int iscsit_close_session(struct iscsi_session *sess) | |
4429 | { | |
60bfcf8e | 4430 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
4431 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
4432 | ||
4433 | if (atomic_read(&sess->nconn)) { | |
4434 | pr_err("%d connection(s) still exist for iSCSI session" | |
4435 | " to %s\n", atomic_read(&sess->nconn), | |
4436 | sess->sess_ops->InitiatorName); | |
4437 | BUG(); | |
4438 | } | |
4439 | ||
4440 | spin_lock_bh(&se_tpg->session_lock); | |
4441 | atomic_set(&sess->session_logout, 1); | |
4442 | atomic_set(&sess->session_reinstatement, 1); | |
4443 | iscsit_stop_time2retain_timer(sess); | |
4444 | spin_unlock_bh(&se_tpg->session_lock); | |
4445 | ||
4446 | /* | |
4447 | * transport_deregister_session_configfs() will clear the | |
4448 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4449 | * can be setting it again with __transport_register_session() in | |
4450 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4451 | * completes in iscsi_np context. | |
4452 | */ | |
4453 | transport_deregister_session_configfs(sess->se_sess); | |
4454 | ||
4455 | /* | |
4456 | * If any other processes are accessing this session pointer we must | |
4457 | * wait until they have completed. If we are in an interrupt (the | |
4458 | * time2retain handler) and contain and active session usage count we | |
4459 | * restart the timer and exit. | |
4460 | */ | |
4461 | if (!in_interrupt()) { | |
4462 | if (iscsit_check_session_usage_count(sess) == 1) | |
4463 | iscsit_stop_session(sess, 1, 1); | |
4464 | } else { | |
4465 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4466 | atomic_set(&sess->session_logout, 0); | |
4467 | iscsit_start_time2retain_handler(sess); | |
4468 | return 0; | |
4469 | } | |
4470 | } | |
4471 | ||
4472 | transport_deregister_session(sess->se_sess); | |
4473 | ||
4474 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4475 | iscsit_free_connection_recovery_entires(sess); | |
4476 | ||
4477 | iscsit_free_all_ooo_cmdsns(sess); | |
4478 | ||
4479 | spin_lock_bh(&se_tpg->session_lock); | |
4480 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4481 | sess->session_state = TARG_SESS_STATE_FREE; | |
4482 | pr_debug("Released iSCSI session from node: %s\n", | |
4483 | sess->sess_ops->InitiatorName); | |
4484 | tpg->nsessions--; | |
4485 | if (tpg->tpg_tiqn) | |
4486 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4487 | ||
4488 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4489 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4490 | ||
4491 | spin_lock(&sess_idr_lock); | |
4492 | idr_remove(&sess_idr, sess->session_index); | |
4493 | spin_unlock(&sess_idr_lock); | |
4494 | ||
4495 | kfree(sess->sess_ops); | |
4496 | sess->sess_ops = NULL; | |
4497 | spin_unlock_bh(&se_tpg->session_lock); | |
4498 | ||
4499 | kfree(sess); | |
4500 | return 0; | |
4501 | } | |
4502 | ||
4503 | static void iscsit_logout_post_handler_closesession( | |
4504 | struct iscsi_conn *conn) | |
4505 | { | |
4506 | struct iscsi_session *sess = conn->sess; | |
4507 | ||
4508 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4509 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4510 | ||
4511 | atomic_set(&conn->conn_logout_remove, 0); | |
4512 | complete(&conn->conn_logout_comp); | |
4513 | ||
4514 | iscsit_dec_conn_usage_count(conn); | |
4515 | iscsit_stop_session(sess, 1, 1); | |
4516 | iscsit_dec_session_usage_count(sess); | |
99367f01 | 4517 | target_put_session(sess->se_sess); |
e48354ce NB |
4518 | } |
4519 | ||
4520 | static void iscsit_logout_post_handler_samecid( | |
4521 | struct iscsi_conn *conn) | |
4522 | { | |
4523 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4524 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4525 | ||
4526 | atomic_set(&conn->conn_logout_remove, 0); | |
4527 | complete(&conn->conn_logout_comp); | |
4528 | ||
4529 | iscsit_cause_connection_reinstatement(conn, 1); | |
4530 | iscsit_dec_conn_usage_count(conn); | |
4531 | } | |
4532 | ||
4533 | static void iscsit_logout_post_handler_diffcid( | |
4534 | struct iscsi_conn *conn, | |
4535 | u16 cid) | |
4536 | { | |
4537 | struct iscsi_conn *l_conn; | |
4538 | struct iscsi_session *sess = conn->sess; | |
b53b0d99 | 4539 | bool conn_found = false; |
e48354ce NB |
4540 | |
4541 | if (!sess) | |
4542 | return; | |
4543 | ||
4544 | spin_lock_bh(&sess->conn_lock); | |
4545 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4546 | if (l_conn->cid == cid) { | |
4547 | iscsit_inc_conn_usage_count(l_conn); | |
b53b0d99 | 4548 | conn_found = true; |
e48354ce NB |
4549 | break; |
4550 | } | |
4551 | } | |
4552 | spin_unlock_bh(&sess->conn_lock); | |
4553 | ||
b53b0d99 | 4554 | if (!conn_found) |
e48354ce NB |
4555 | return; |
4556 | ||
4557 | if (l_conn->sock) | |
4558 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4559 | ||
4560 | spin_lock_bh(&l_conn->state_lock); | |
4561 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4562 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4563 | spin_unlock_bh(&l_conn->state_lock); | |
4564 | ||
4565 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4566 | iscsit_dec_conn_usage_count(l_conn); | |
4567 | } | |
4568 | ||
4569 | /* | |
4570 | * Return of 0 causes the TX thread to restart. | |
4571 | */ | |
2ec5a8c1 | 4572 | int iscsit_logout_post_handler( |
e48354ce NB |
4573 | struct iscsi_cmd *cmd, |
4574 | struct iscsi_conn *conn) | |
4575 | { | |
4576 | int ret = 0; | |
4577 | ||
4578 | switch (cmd->logout_reason) { | |
4579 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4580 | switch (cmd->logout_response) { | |
4581 | case ISCSI_LOGOUT_SUCCESS: | |
4582 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4583 | default: | |
4584 | iscsit_logout_post_handler_closesession(conn); | |
4585 | break; | |
4586 | } | |
4587 | ret = 0; | |
4588 | break; | |
4589 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4590 | if (conn->cid == cmd->logout_cid) { | |
4591 | switch (cmd->logout_response) { | |
4592 | case ISCSI_LOGOUT_SUCCESS: | |
4593 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4594 | default: | |
4595 | iscsit_logout_post_handler_samecid(conn); | |
4596 | break; | |
4597 | } | |
4598 | ret = 0; | |
4599 | } else { | |
4600 | switch (cmd->logout_response) { | |
4601 | case ISCSI_LOGOUT_SUCCESS: | |
4602 | iscsit_logout_post_handler_diffcid(conn, | |
4603 | cmd->logout_cid); | |
4604 | break; | |
4605 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4606 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4607 | default: | |
4608 | break; | |
4609 | } | |
4610 | ret = 1; | |
4611 | } | |
4612 | break; | |
4613 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4614 | switch (cmd->logout_response) { | |
4615 | case ISCSI_LOGOUT_SUCCESS: | |
4616 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4617 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4618 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4619 | default: | |
4620 | break; | |
4621 | } | |
4622 | ret = 1; | |
4623 | break; | |
4624 | default: | |
4625 | break; | |
4626 | ||
4627 | } | |
4628 | return ret; | |
4629 | } | |
2ec5a8c1 | 4630 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4631 | |
4632 | void iscsit_fail_session(struct iscsi_session *sess) | |
4633 | { | |
4634 | struct iscsi_conn *conn; | |
4635 | ||
4636 | spin_lock_bh(&sess->conn_lock); | |
4637 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4638 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4639 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4640 | } | |
4641 | spin_unlock_bh(&sess->conn_lock); | |
4642 | ||
4643 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4644 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4645 | } | |
4646 | ||
4647 | int iscsit_free_session(struct iscsi_session *sess) | |
4648 | { | |
4649 | u16 conn_count = atomic_read(&sess->nconn); | |
4650 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4651 | int is_last; | |
4652 | ||
4653 | spin_lock_bh(&sess->conn_lock); | |
4654 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4655 | ||
4656 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4657 | conn_list) { | |
4658 | if (conn_count == 0) | |
4659 | break; | |
4660 | ||
4661 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4662 | is_last = 1; | |
4663 | } else { | |
4664 | iscsit_inc_conn_usage_count(conn_tmp); | |
4665 | is_last = 0; | |
4666 | } | |
4667 | iscsit_inc_conn_usage_count(conn); | |
4668 | ||
4669 | spin_unlock_bh(&sess->conn_lock); | |
4670 | iscsit_cause_connection_reinstatement(conn, 1); | |
4671 | spin_lock_bh(&sess->conn_lock); | |
4672 | ||
4673 | iscsit_dec_conn_usage_count(conn); | |
4674 | if (is_last == 0) | |
4675 | iscsit_dec_conn_usage_count(conn_tmp); | |
4676 | ||
4677 | conn_count--; | |
4678 | } | |
4679 | ||
4680 | if (atomic_read(&sess->nconn)) { | |
4681 | spin_unlock_bh(&sess->conn_lock); | |
4682 | wait_for_completion(&sess->session_wait_comp); | |
4683 | } else | |
4684 | spin_unlock_bh(&sess->conn_lock); | |
4685 | ||
99367f01 | 4686 | target_put_session(sess->se_sess); |
e48354ce NB |
4687 | return 0; |
4688 | } | |
4689 | ||
4690 | void iscsit_stop_session( | |
4691 | struct iscsi_session *sess, | |
4692 | int session_sleep, | |
4693 | int connection_sleep) | |
4694 | { | |
4695 | u16 conn_count = atomic_read(&sess->nconn); | |
4696 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4697 | int is_last; | |
4698 | ||
4699 | spin_lock_bh(&sess->conn_lock); | |
4700 | if (session_sleep) | |
4701 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4702 | ||
4703 | if (connection_sleep) { | |
4704 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4705 | conn_list) { | |
4706 | if (conn_count == 0) | |
4707 | break; | |
4708 | ||
4709 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4710 | is_last = 1; | |
4711 | } else { | |
4712 | iscsit_inc_conn_usage_count(conn_tmp); | |
4713 | is_last = 0; | |
4714 | } | |
4715 | iscsit_inc_conn_usage_count(conn); | |
4716 | ||
4717 | spin_unlock_bh(&sess->conn_lock); | |
4718 | iscsit_cause_connection_reinstatement(conn, 1); | |
4719 | spin_lock_bh(&sess->conn_lock); | |
4720 | ||
4721 | iscsit_dec_conn_usage_count(conn); | |
4722 | if (is_last == 0) | |
4723 | iscsit_dec_conn_usage_count(conn_tmp); | |
4724 | conn_count--; | |
4725 | } | |
4726 | } else { | |
4727 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4728 | iscsit_cause_connection_reinstatement(conn, 0); | |
4729 | } | |
4730 | ||
4731 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4732 | spin_unlock_bh(&sess->conn_lock); | |
4733 | wait_for_completion(&sess->session_wait_comp); | |
4734 | } else | |
4735 | spin_unlock_bh(&sess->conn_lock); | |
4736 | } | |
4737 | ||
4738 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4739 | { | |
4740 | struct iscsi_session *sess; | |
4741 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4742 | struct se_session *se_sess, *se_sess_tmp; | |
4743 | int session_count = 0; | |
4744 | ||
4745 | spin_lock_bh(&se_tpg->session_lock); | |
4746 | if (tpg->nsessions && !force) { | |
4747 | spin_unlock_bh(&se_tpg->session_lock); | |
4748 | return -1; | |
4749 | } | |
4750 | ||
4751 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4752 | sess_list) { | |
4753 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4754 | ||
4755 | spin_lock(&sess->conn_lock); | |
4756 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4757 | atomic_read(&sess->session_logout) || | |
4758 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4759 | spin_unlock(&sess->conn_lock); | |
4760 | continue; | |
4761 | } | |
4762 | atomic_set(&sess->session_reinstatement, 1); | |
4763 | spin_unlock(&sess->conn_lock); | |
4764 | spin_unlock_bh(&se_tpg->session_lock); | |
4765 | ||
4766 | iscsit_free_session(sess); | |
4767 | spin_lock_bh(&se_tpg->session_lock); | |
4768 | ||
4769 | session_count++; | |
4770 | } | |
4771 | spin_unlock_bh(&se_tpg->session_lock); | |
4772 | ||
4773 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4774 | " Group: %hu\n", session_count, tpg->tpgt); | |
4775 | return 0; | |
4776 | } | |
4777 | ||
4778 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4779 | MODULE_VERSION("4.1.x"); | |
4780 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4781 | MODULE_LICENSE("GPL"); | |
4782 | ||
4783 | module_init(iscsi_target_init_module); | |
4784 | module_exit(iscsi_target_cleanup_module); |