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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 | ||
69110e3c | 19 | #include <crypto/hash.h> |
e48354ce NB |
20 | #include <linux/string.h> |
21 | #include <linux/kthread.h> | |
e48354ce | 22 | #include <linux/completion.h> |
827509e3 | 23 | #include <linux/module.h> |
5538d294 | 24 | #include <linux/vmalloc.h> |
40401530 | 25 | #include <linux/idr.h> |
8dcf07be | 26 | #include <linux/delay.h> |
3f07c014 | 27 | #include <linux/sched/signal.h> |
e48354ce | 28 | #include <asm/unaligned.h> |
7bfca0cf | 29 | #include <linux/inet.h> |
8dcf07be | 30 | #include <net/ipv6.h> |
ba929992 | 31 | #include <scsi/scsi_proto.h> |
e48354ce | 32 | #include <scsi/iscsi_proto.h> |
d28b1169 | 33 | #include <scsi/scsi_tcq.h> |
e48354ce | 34 | #include <target/target_core_base.h> |
c4795fb2 | 35 | #include <target/target_core_fabric.h> |
e48354ce | 36 | |
67f091f2 | 37 | #include <target/iscsi/iscsi_target_core.h> |
e48354ce NB |
38 | #include "iscsi_target_parameters.h" |
39 | #include "iscsi_target_seq_pdu_list.h" | |
e48354ce NB |
40 | #include "iscsi_target_datain_values.h" |
41 | #include "iscsi_target_erl0.h" | |
42 | #include "iscsi_target_erl1.h" | |
43 | #include "iscsi_target_erl2.h" | |
44 | #include "iscsi_target_login.h" | |
45 | #include "iscsi_target_tmr.h" | |
46 | #include "iscsi_target_tpg.h" | |
47 | #include "iscsi_target_util.h" | |
48 | #include "iscsi_target.h" | |
49 | #include "iscsi_target_device.h" | |
67f091f2 | 50 | #include <target/iscsi/iscsi_target_stat.h> |
e48354ce | 51 | |
baa4d64b NB |
52 | #include <target/iscsi/iscsi_transport.h> |
53 | ||
e48354ce NB |
54 | static LIST_HEAD(g_tiqn_list); |
55 | static LIST_HEAD(g_np_list); | |
56 | static DEFINE_SPINLOCK(tiqn_lock); | |
ee291e63 | 57 | static DEFINE_MUTEX(np_lock); |
e48354ce NB |
58 | |
59 | static struct idr tiqn_idr; | |
31ff0cee | 60 | DEFINE_IDA(sess_ida); |
e48354ce | 61 | struct mutex auth_id_lock; |
e48354ce NB |
62 | |
63 | struct iscsit_global *iscsit_global; | |
64 | ||
e48354ce NB |
65 | struct kmem_cache *lio_qr_cache; |
66 | struct kmem_cache *lio_dr_cache; | |
67 | struct kmem_cache *lio_ooo_cache; | |
68 | struct kmem_cache *lio_r2t_cache; | |
69 | ||
70 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
2ec5a8c1 | 71 | struct iscsi_scsi_req *, u32); |
e48354ce NB |
72 | |
73 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
74 | { | |
75 | struct iscsi_tiqn *tiqn = NULL; | |
76 | ||
77 | spin_lock(&tiqn_lock); | |
78 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
79 | if (!strcmp(tiqn->tiqn, buf)) { | |
80 | ||
81 | spin_lock(&tiqn->tiqn_state_lock); | |
82 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
83 | tiqn->tiqn_access_count++; | |
84 | spin_unlock(&tiqn->tiqn_state_lock); | |
85 | spin_unlock(&tiqn_lock); | |
86 | return tiqn; | |
87 | } | |
88 | spin_unlock(&tiqn->tiqn_state_lock); | |
89 | } | |
90 | } | |
91 | spin_unlock(&tiqn_lock); | |
92 | ||
93 | return NULL; | |
94 | } | |
95 | ||
96 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
97 | { | |
98 | spin_lock(&tiqn->tiqn_state_lock); | |
99 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
100 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
101 | spin_unlock(&tiqn->tiqn_state_lock); | |
102 | return 0; | |
103 | } | |
104 | spin_unlock(&tiqn->tiqn_state_lock); | |
105 | ||
106 | return -1; | |
107 | } | |
108 | ||
109 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
110 | { | |
111 | spin_lock(&tiqn->tiqn_state_lock); | |
112 | tiqn->tiqn_access_count--; | |
113 | spin_unlock(&tiqn->tiqn_state_lock); | |
114 | } | |
115 | ||
116 | /* | |
117 | * Note that IQN formatting is expected to be done in userspace, and | |
118 | * no explict IQN format checks are done here. | |
119 | */ | |
120 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
121 | { | |
122 | struct iscsi_tiqn *tiqn = NULL; | |
123 | int ret; | |
124 | ||
8f50c7f5 | 125 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
126 | pr_err("Target IQN exceeds %d bytes\n", |
127 | ISCSI_IQN_LEN); | |
128 | return ERR_PTR(-EINVAL); | |
129 | } | |
130 | ||
3829f381 | 131 | tiqn = kzalloc(sizeof(*tiqn), GFP_KERNEL); |
c46e22f1 | 132 | if (!tiqn) |
e48354ce | 133 | return ERR_PTR(-ENOMEM); |
e48354ce NB |
134 | |
135 | sprintf(tiqn->tiqn, "%s", buf); | |
136 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
137 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
138 | spin_lock_init(&tiqn->tiqn_state_lock); | |
139 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
140 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
141 | spin_lock_init(&tiqn->login_stats.lock); | |
142 | spin_lock_init(&tiqn->logout_stats.lock); | |
143 | ||
e48354ce NB |
144 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; |
145 | ||
c9365bd0 | 146 | idr_preload(GFP_KERNEL); |
e48354ce | 147 | spin_lock(&tiqn_lock); |
c9365bd0 TH |
148 | |
149 | ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); | |
e48354ce | 150 | if (ret < 0) { |
c9365bd0 | 151 | pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); |
e48354ce | 152 | spin_unlock(&tiqn_lock); |
c9365bd0 | 153 | idr_preload_end(); |
e48354ce NB |
154 | kfree(tiqn); |
155 | return ERR_PTR(ret); | |
156 | } | |
c9365bd0 | 157 | tiqn->tiqn_index = ret; |
e48354ce | 158 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); |
c9365bd0 | 159 | |
e48354ce | 160 | spin_unlock(&tiqn_lock); |
c9365bd0 | 161 | idr_preload_end(); |
e48354ce NB |
162 | |
163 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
164 | ||
165 | return tiqn; | |
166 | ||
167 | } | |
168 | ||
169 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
170 | { | |
171 | /* | |
172 | * Wait for accesses to said struct iscsi_tiqn to end. | |
173 | */ | |
174 | spin_lock(&tiqn->tiqn_state_lock); | |
175 | while (tiqn->tiqn_access_count != 0) { | |
176 | spin_unlock(&tiqn->tiqn_state_lock); | |
177 | msleep(10); | |
178 | spin_lock(&tiqn->tiqn_state_lock); | |
179 | } | |
180 | spin_unlock(&tiqn->tiqn_state_lock); | |
181 | } | |
182 | ||
183 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
184 | { | |
185 | /* | |
186 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
187 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
188 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
189 | * fabric and control code paths. | |
190 | */ | |
191 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
192 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
193 | return; | |
194 | } | |
195 | ||
196 | iscsit_wait_for_tiqn(tiqn); | |
197 | ||
198 | spin_lock(&tiqn_lock); | |
199 | list_del(&tiqn->tiqn_list); | |
200 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
201 | spin_unlock(&tiqn_lock); | |
202 | ||
203 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
204 | tiqn->tiqn); | |
205 | kfree(tiqn); | |
206 | } | |
207 | ||
208 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
209 | { | |
210 | int ret; | |
211 | /* | |
212 | * Determine if the network portal is accepting storage traffic. | |
213 | */ | |
214 | spin_lock_bh(&np->np_thread_lock); | |
215 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
216 | spin_unlock_bh(&np->np_thread_lock); | |
217 | return -1; | |
218 | } | |
e48354ce NB |
219 | spin_unlock_bh(&np->np_thread_lock); |
220 | /* | |
221 | * Determine if the portal group is accepting storage traffic. | |
222 | */ | |
223 | spin_lock_bh(&tpg->tpg_state_lock); | |
224 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
225 | spin_unlock_bh(&tpg->tpg_state_lock); | |
226 | return -1; | |
227 | } | |
228 | spin_unlock_bh(&tpg->tpg_state_lock); | |
229 | ||
230 | /* | |
231 | * Here we serialize access across the TIQN+TPG Tuple. | |
232 | */ | |
a91eb7d9 | 233 | ret = down_interruptible(&tpg->np_login_sem); |
ee7619f2 | 234 | if (ret != 0) |
e48354ce NB |
235 | return -1; |
236 | ||
a91eb7d9 NB |
237 | spin_lock_bh(&tpg->tpg_state_lock); |
238 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
239 | spin_unlock_bh(&tpg->tpg_state_lock); | |
240 | up(&tpg->np_login_sem); | |
241 | return -1; | |
242 | } | |
243 | spin_unlock_bh(&tpg->tpg_state_lock); | |
e48354ce NB |
244 | |
245 | return 0; | |
246 | } | |
247 | ||
a91eb7d9 NB |
248 | void iscsit_login_kref_put(struct kref *kref) |
249 | { | |
250 | struct iscsi_tpg_np *tpg_np = container_of(kref, | |
251 | struct iscsi_tpg_np, tpg_np_kref); | |
252 | ||
253 | complete(&tpg_np->tpg_np_comp); | |
254 | } | |
255 | ||
256 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg, | |
257 | struct iscsi_tpg_np *tpg_np) | |
e48354ce NB |
258 | { |
259 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
260 | ||
a91eb7d9 | 261 | up(&tpg->np_login_sem); |
e48354ce | 262 | |
a91eb7d9 NB |
263 | if (tpg_np) |
264 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
e48354ce NB |
265 | |
266 | if (tiqn) | |
267 | iscsit_put_tiqn_for_login(tiqn); | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
05b96892 | 272 | bool iscsit_check_np_match( |
13a3cf08 | 273 | struct sockaddr_storage *sockaddr, |
05b96892 | 274 | struct iscsi_np *np, |
e48354ce NB |
275 | int network_transport) |
276 | { | |
277 | struct sockaddr_in *sock_in, *sock_in_e; | |
278 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
05b96892 | 279 | bool ip_match = false; |
69d75574 | 280 | u16 port, port_e; |
e48354ce | 281 | |
05b96892 NB |
282 | if (sockaddr->ss_family == AF_INET6) { |
283 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
284 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
285 | ||
286 | if (!memcmp(&sock_in6->sin6_addr.in6_u, | |
287 | &sock_in6_e->sin6_addr.in6_u, | |
288 | sizeof(struct in6_addr))) | |
289 | ip_match = true; | |
290 | ||
291 | port = ntohs(sock_in6->sin6_port); | |
69d75574 | 292 | port_e = ntohs(sock_in6_e->sin6_port); |
05b96892 NB |
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); | |
69d75574 | 301 | port_e = ntohs(sock_in_e->sin_port); |
05b96892 NB |
302 | } |
303 | ||
69d75574 | 304 | if (ip_match && (port_e == port) && |
05b96892 NB |
305 | (np->np_network_transport == network_transport)) |
306 | return true; | |
307 | ||
308 | return false; | |
309 | } | |
310 | ||
311 | static struct iscsi_np *iscsit_get_np( | |
13a3cf08 | 312 | struct sockaddr_storage *sockaddr, |
05b96892 NB |
313 | int network_transport) |
314 | { | |
315 | struct iscsi_np *np; | |
316 | bool match; | |
317 | ||
618baaf7 BVA |
318 | lockdep_assert_held(&np_lock); |
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( | |
13a3cf08 | 345 | struct sockaddr_storage *sockaddr, |
e48354ce NB |
346 | int network_transport) |
347 | { | |
e48354ce NB |
348 | struct iscsi_np *np; |
349 | int ret; | |
ee291e63 AG |
350 | |
351 | mutex_lock(&np_lock); | |
352 | ||
e48354ce NB |
353 | /* |
354 | * Locate the existing struct iscsi_np if already active.. | |
355 | */ | |
356 | np = iscsit_get_np(sockaddr, network_transport); | |
ee291e63 AG |
357 | if (np) { |
358 | mutex_unlock(&np_lock); | |
e48354ce | 359 | return np; |
ee291e63 | 360 | } |
e48354ce | 361 | |
3829f381 | 362 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
e48354ce | 363 | if (!np) { |
ee291e63 | 364 | mutex_unlock(&np_lock); |
e48354ce NB |
365 | return ERR_PTR(-ENOMEM); |
366 | } | |
367 | ||
368 | np->np_flags |= NPF_IP_NETWORK; | |
e48354ce NB |
369 | np->np_network_transport = network_transport; |
370 | spin_lock_init(&np->np_thread_lock); | |
371 | init_completion(&np->np_restart_comp); | |
372 | INIT_LIST_HEAD(&np->np_list); | |
373 | ||
f7c9564a | 374 | timer_setup(&np->np_login_timer, iscsi_handle_login_thread_timeout, 0); |
8a47aa9d | 375 | |
e48354ce NB |
376 | ret = iscsi_target_setup_login_socket(np, sockaddr); |
377 | if (ret != 0) { | |
378 | kfree(np); | |
ee291e63 | 379 | mutex_unlock(&np_lock); |
e48354ce NB |
380 | return ERR_PTR(ret); |
381 | } | |
382 | ||
383 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
384 | if (IS_ERR(np->np_thread)) { | |
385 | pr_err("Unable to create kthread: iscsi_np\n"); | |
386 | ret = PTR_ERR(np->np_thread); | |
387 | kfree(np); | |
ee291e63 | 388 | mutex_unlock(&np_lock); |
e48354ce NB |
389 | return ERR_PTR(ret); |
390 | } | |
391 | /* | |
392 | * Increment the np_exports reference count now to prevent | |
393 | * iscsit_del_np() below from being run while a new call to | |
394 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
395 | * active. We don't need to hold np->np_thread_lock at this | |
396 | * point because iscsi_np has not been added to g_np_list yet. | |
397 | */ | |
398 | np->np_exports = 1; | |
ee291e63 | 399 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
e48354ce | 400 | |
e48354ce | 401 | list_add_tail(&np->np_list, &g_np_list); |
ee291e63 | 402 | mutex_unlock(&np_lock); |
e48354ce | 403 | |
69d75574 AG |
404 | pr_debug("CORE[0] - Added Network Portal: %pISpc on %s\n", |
405 | &np->np_sockaddr, np->np_transport->name); | |
e48354ce NB |
406 | |
407 | return np; | |
408 | } | |
409 | ||
410 | int iscsit_reset_np_thread( | |
411 | struct iscsi_np *np, | |
412 | struct iscsi_tpg_np *tpg_np, | |
a91eb7d9 NB |
413 | struct iscsi_portal_group *tpg, |
414 | bool shutdown) | |
e48354ce NB |
415 | { |
416 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
417 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { |
418 | spin_unlock_bh(&np->np_thread_lock); | |
419 | return 0; | |
420 | } | |
421 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
978d13d6 | 422 | atomic_inc(&np->np_reset_count); |
e48354ce NB |
423 | |
424 | if (np->np_thread) { | |
425 | spin_unlock_bh(&np->np_thread_lock); | |
426 | send_sig(SIGINT, np->np_thread, 1); | |
427 | wait_for_completion(&np->np_restart_comp); | |
428 | spin_lock_bh(&np->np_thread_lock); | |
429 | } | |
430 | spin_unlock_bh(&np->np_thread_lock); | |
431 | ||
a91eb7d9 NB |
432 | if (tpg_np && shutdown) { |
433 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
434 | ||
435 | wait_for_completion(&tpg_np->tpg_np_comp); | |
436 | } | |
437 | ||
e48354ce NB |
438 | return 0; |
439 | } | |
440 | ||
baa4d64b | 441 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 442 | { |
bf6932f4 AV |
443 | if (np->np_socket) |
444 | sock_release(np->np_socket); | |
e48354ce NB |
445 | } |
446 | ||
447 | int iscsit_del_np(struct iscsi_np *np) | |
448 | { | |
449 | spin_lock_bh(&np->np_thread_lock); | |
450 | np->np_exports--; | |
451 | if (np->np_exports) { | |
2363d196 | 452 | np->enabled = true; |
e48354ce NB |
453 | spin_unlock_bh(&np->np_thread_lock); |
454 | return 0; | |
455 | } | |
456 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
457 | spin_unlock_bh(&np->np_thread_lock); | |
458 | ||
459 | if (np->np_thread) { | |
460 | /* | |
461 | * We need to send the signal to wakeup Linux/Net | |
462 | * which may be sleeping in sock_accept().. | |
463 | */ | |
464 | send_sig(SIGINT, np->np_thread, 1); | |
465 | kthread_stop(np->np_thread); | |
db6077fd | 466 | np->np_thread = NULL; |
e48354ce | 467 | } |
baa4d64b NB |
468 | |
469 | np->np_transport->iscsit_free_np(np); | |
e48354ce | 470 | |
ee291e63 | 471 | mutex_lock(&np_lock); |
e48354ce | 472 | list_del(&np->np_list); |
ee291e63 | 473 | mutex_unlock(&np_lock); |
e48354ce | 474 | |
69d75574 AG |
475 | pr_debug("CORE[0] - Removed Network Portal: %pISpc on %s\n", |
476 | &np->np_sockaddr, np->np_transport->name); | |
e48354ce | 477 | |
baa4d64b | 478 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
479 | kfree(np); |
480 | return 0; | |
481 | } | |
482 | ||
e8205cca | 483 | static void iscsit_get_rx_pdu(struct iscsi_conn *); |
2ec5a8c1 | 484 | |
d2faaefb | 485 | int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
2ec5a8c1 | 486 | { |
a4467018 | 487 | return iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); |
2ec5a8c1 | 488 | } |
d2faaefb | 489 | EXPORT_SYMBOL(iscsit_queue_rsp); |
2ec5a8c1 | 490 | |
d2faaefb | 491 | void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
131e6abc | 492 | { |
131e6abc | 493 | spin_lock_bh(&conn->cmd_lock); |
064cdd2d NB |
494 | if (!list_empty(&cmd->i_conn_node) && |
495 | !(cmd->se_cmd.transport_state & CMD_T_FABRIC_STOP)) | |
131e6abc NB |
496 | list_del_init(&cmd->i_conn_node); |
497 | spin_unlock_bh(&conn->cmd_lock); | |
498 | ||
4412a671 | 499 | __iscsit_free_cmd(cmd, true); |
131e6abc | 500 | } |
d2faaefb | 501 | EXPORT_SYMBOL(iscsit_aborted_task); |
131e6abc | 502 | |
2854bb23 | 503 | static void iscsit_do_crypto_hash_buf(struct ahash_request *, const void *, |
e1dfb21f | 504 | u32, u32, const void *, void *); |
2854bb23 VP |
505 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *); |
506 | ||
507 | static int | |
508 | iscsit_xmit_nondatain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
509 | const void *data_buf, u32 data_buf_len) | |
510 | { | |
511 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)cmd->pdu; | |
512 | struct kvec *iov; | |
513 | u32 niov = 0, tx_size = ISCSI_HDR_LEN; | |
514 | int ret; | |
515 | ||
516 | iov = &cmd->iov_misc[0]; | |
517 | iov[niov].iov_base = cmd->pdu; | |
518 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
519 | ||
520 | if (conn->conn_ops->HeaderDigest) { | |
521 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
522 | ||
523 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr, | |
524 | ISCSI_HDR_LEN, 0, NULL, | |
e1dfb21f | 525 | header_digest); |
2854bb23 VP |
526 | |
527 | iov[0].iov_len += ISCSI_CRC_LEN; | |
528 | tx_size += ISCSI_CRC_LEN; | |
529 | pr_debug("Attaching CRC32C HeaderDigest" | |
530 | " to opcode 0x%x 0x%08x\n", | |
531 | hdr->opcode, *header_digest); | |
532 | } | |
533 | ||
534 | if (data_buf_len) { | |
535 | u32 padding = ((-data_buf_len) & 3); | |
536 | ||
537 | iov[niov].iov_base = (void *)data_buf; | |
538 | iov[niov++].iov_len = data_buf_len; | |
539 | tx_size += data_buf_len; | |
540 | ||
541 | if (padding != 0) { | |
542 | iov[niov].iov_base = &cmd->pad_bytes; | |
543 | iov[niov++].iov_len = padding; | |
544 | tx_size += padding; | |
545 | pr_debug("Attaching %u additional" | |
546 | " padding bytes.\n", padding); | |
547 | } | |
548 | ||
549 | if (conn->conn_ops->DataDigest) { | |
550 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, | |
551 | data_buf, data_buf_len, | |
e1dfb21f BVA |
552 | padding, &cmd->pad_bytes, |
553 | &cmd->data_crc); | |
2854bb23 VP |
554 | |
555 | iov[niov].iov_base = &cmd->data_crc; | |
556 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
557 | tx_size += ISCSI_CRC_LEN; | |
558 | pr_debug("Attached DataDigest for %u" | |
559 | " bytes opcode 0x%x, CRC 0x%08x\n", | |
560 | data_buf_len, hdr->opcode, cmd->data_crc); | |
561 | } | |
562 | } | |
563 | ||
564 | cmd->iov_misc_count = niov; | |
565 | cmd->tx_size = tx_size; | |
566 | ||
567 | ret = iscsit_send_tx_data(cmd, conn, 1); | |
568 | if (ret < 0) { | |
569 | iscsit_tx_thread_wait_for_tcp(conn); | |
570 | return ret; | |
571 | } | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | static int iscsit_map_iovec(struct iscsi_cmd *, struct kvec *, u32, u32); | |
577 | static void iscsit_unmap_iovec(struct iscsi_cmd *); | |
578 | static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsi_cmd *, | |
579 | u32, u32, u32, u8 *); | |
580 | static int | |
581 | iscsit_xmit_datain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
582 | const struct iscsi_datain *datain) | |
583 | { | |
584 | struct kvec *iov; | |
585 | u32 iov_count = 0, tx_size = 0; | |
586 | int ret, iov_ret; | |
587 | ||
588 | iov = &cmd->iov_data[0]; | |
589 | iov[iov_count].iov_base = cmd->pdu; | |
590 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
591 | tx_size += ISCSI_HDR_LEN; | |
592 | ||
593 | if (conn->conn_ops->HeaderDigest) { | |
594 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
595 | ||
596 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu, | |
597 | ISCSI_HDR_LEN, 0, NULL, | |
e1dfb21f | 598 | header_digest); |
2854bb23 VP |
599 | |
600 | iov[0].iov_len += ISCSI_CRC_LEN; | |
601 | tx_size += ISCSI_CRC_LEN; | |
602 | ||
603 | pr_debug("Attaching CRC32 HeaderDigest for DataIN PDU 0x%08x\n", | |
604 | *header_digest); | |
605 | } | |
606 | ||
607 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], | |
608 | datain->offset, datain->length); | |
609 | if (iov_ret < 0) | |
610 | return -1; | |
611 | ||
612 | iov_count += iov_ret; | |
613 | tx_size += datain->length; | |
614 | ||
615 | cmd->padding = ((-datain->length) & 3); | |
616 | if (cmd->padding) { | |
617 | iov[iov_count].iov_base = cmd->pad_bytes; | |
618 | iov[iov_count++].iov_len = cmd->padding; | |
619 | tx_size += cmd->padding; | |
620 | ||
621 | pr_debug("Attaching %u padding bytes\n", cmd->padding); | |
622 | } | |
623 | ||
624 | if (conn->conn_ops->DataDigest) { | |
625 | cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash, | |
626 | cmd, datain->offset, | |
627 | datain->length, | |
628 | cmd->padding, | |
629 | cmd->pad_bytes); | |
630 | ||
631 | iov[iov_count].iov_base = &cmd->data_crc; | |
632 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
633 | tx_size += ISCSI_CRC_LEN; | |
634 | ||
635 | pr_debug("Attached CRC32C DataDigest %d bytes, crc 0x%08x\n", | |
636 | datain->length + cmd->padding, cmd->data_crc); | |
637 | } | |
638 | ||
639 | cmd->iov_data_count = iov_count; | |
640 | cmd->tx_size = tx_size; | |
641 | ||
642 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
643 | ||
644 | iscsit_unmap_iovec(cmd); | |
645 | ||
646 | if (ret < 0) { | |
647 | iscsit_tx_thread_wait_for_tcp(conn); | |
648 | return ret; | |
649 | } | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | static int iscsit_xmit_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
655 | struct iscsi_datain_req *dr, const void *buf, | |
656 | u32 buf_len) | |
657 | { | |
658 | if (dr) | |
659 | return iscsit_xmit_datain_pdu(conn, cmd, buf); | |
660 | else | |
661 | return iscsit_xmit_nondatain_pdu(conn, cmd, buf, buf_len); | |
662 | } | |
663 | ||
e70beee7 NB |
664 | static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn) |
665 | { | |
666 | return TARGET_PROT_NORMAL; | |
667 | } | |
668 | ||
baa4d64b NB |
669 | static struct iscsit_transport iscsi_target_transport = { |
670 | .name = "iSCSI/TCP", | |
671 | .transport_type = ISCSI_TCP, | |
bd027d85 | 672 | .rdma_shutdown = false, |
baa4d64b NB |
673 | .owner = NULL, |
674 | .iscsit_setup_np = iscsit_setup_np, | |
675 | .iscsit_accept_np = iscsit_accept_np, | |
676 | .iscsit_free_np = iscsit_free_np, | |
677 | .iscsit_get_login_rx = iscsit_get_login_rx, | |
678 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 679 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
680 | .iscsit_immediate_queue = iscsit_immediate_queue, |
681 | .iscsit_response_queue = iscsit_response_queue, | |
682 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
683 | .iscsit_queue_status = iscsit_queue_rsp, | |
131e6abc | 684 | .iscsit_aborted_task = iscsit_aborted_task, |
2854bb23 | 685 | .iscsit_xmit_pdu = iscsit_xmit_pdu, |
e8205cca | 686 | .iscsit_get_rx_pdu = iscsit_get_rx_pdu, |
e70beee7 | 687 | .iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops, |
baa4d64b NB |
688 | }; |
689 | ||
e48354ce NB |
690 | static int __init iscsi_target_init_module(void) |
691 | { | |
88dcd2da | 692 | int ret = 0, size; |
e48354ce NB |
693 | |
694 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
3829f381 | 695 | iscsit_global = kzalloc(sizeof(*iscsit_global), GFP_KERNEL); |
c46e22f1 | 696 | if (!iscsit_global) |
e48354ce | 697 | return -1; |
c46e22f1 | 698 | |
88dcd2da | 699 | spin_lock_init(&iscsit_global->ts_bitmap_lock); |
e48354ce | 700 | mutex_init(&auth_id_lock); |
e48354ce | 701 | idr_init(&tiqn_idr); |
e48354ce | 702 | |
9ac8928e CH |
703 | ret = target_register_template(&iscsi_ops); |
704 | if (ret) | |
e48354ce NB |
705 | goto out; |
706 | ||
88dcd2da NB |
707 | size = BITS_TO_LONGS(ISCSIT_BITMAP_BITS) * sizeof(long); |
708 | iscsit_global->ts_bitmap = vzalloc(size); | |
c46e22f1 | 709 | if (!iscsit_global->ts_bitmap) |
e48354ce | 710 | goto configfs_out; |
e48354ce | 711 | |
e48354ce NB |
712 | lio_qr_cache = kmem_cache_create("lio_qr_cache", |
713 | sizeof(struct iscsi_queue_req), | |
714 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
715 | if (!lio_qr_cache) { | |
621a4367 | 716 | pr_err("Unable to kmem_cache_create() for" |
e48354ce | 717 | " lio_qr_cache\n"); |
88dcd2da | 718 | goto bitmap_out; |
e48354ce NB |
719 | } |
720 | ||
721 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
722 | sizeof(struct iscsi_datain_req), | |
723 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
724 | if (!lio_dr_cache) { | |
725 | pr_err("Unable to kmem_cache_create() for" | |
726 | " lio_dr_cache\n"); | |
727 | goto qr_out; | |
728 | } | |
729 | ||
730 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
731 | sizeof(struct iscsi_ooo_cmdsn), | |
732 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
733 | if (!lio_ooo_cache) { | |
734 | pr_err("Unable to kmem_cache_create() for" | |
735 | " lio_ooo_cache\n"); | |
736 | goto dr_out; | |
737 | } | |
738 | ||
739 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
740 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
741 | 0, NULL); | |
742 | if (!lio_r2t_cache) { | |
743 | pr_err("Unable to kmem_cache_create() for" | |
744 | " lio_r2t_cache\n"); | |
745 | goto ooo_out; | |
746 | } | |
747 | ||
baa4d64b NB |
748 | iscsit_register_transport(&iscsi_target_transport); |
749 | ||
e48354ce NB |
750 | if (iscsit_load_discovery_tpg() < 0) |
751 | goto r2t_out; | |
752 | ||
753 | return ret; | |
754 | r2t_out: | |
7f2c53bb | 755 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
756 | kmem_cache_destroy(lio_r2t_cache); |
757 | ooo_out: | |
758 | kmem_cache_destroy(lio_ooo_cache); | |
759 | dr_out: | |
760 | kmem_cache_destroy(lio_dr_cache); | |
761 | qr_out: | |
762 | kmem_cache_destroy(lio_qr_cache); | |
88dcd2da NB |
763 | bitmap_out: |
764 | vfree(iscsit_global->ts_bitmap); | |
e48354ce | 765 | configfs_out: |
9ac8928e CH |
766 | /* XXX: this probably wants it to be it's own unwind step.. */ |
767 | if (iscsit_global->discovery_tpg) | |
768 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
769 | target_unregister_template(&iscsi_ops); | |
e48354ce NB |
770 | out: |
771 | kfree(iscsit_global); | |
772 | return -ENOMEM; | |
773 | } | |
774 | ||
775 | static void __exit iscsi_target_cleanup_module(void) | |
776 | { | |
e48354ce | 777 | iscsit_release_discovery_tpg(); |
baa4d64b | 778 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
779 | kmem_cache_destroy(lio_qr_cache); |
780 | kmem_cache_destroy(lio_dr_cache); | |
781 | kmem_cache_destroy(lio_ooo_cache); | |
782 | kmem_cache_destroy(lio_r2t_cache); | |
783 | ||
9ac8928e CH |
784 | /* |
785 | * Shutdown discovery sessions and disable discovery TPG | |
786 | */ | |
787 | if (iscsit_global->discovery_tpg) | |
788 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
e48354ce | 789 | |
9ac8928e | 790 | target_unregister_template(&iscsi_ops); |
e48354ce | 791 | |
88dcd2da | 792 | vfree(iscsit_global->ts_bitmap); |
e48354ce NB |
793 | kfree(iscsit_global); |
794 | } | |
795 | ||
d2faaefb | 796 | int iscsit_add_reject( |
ba159914 | 797 | struct iscsi_conn *conn, |
e48354ce | 798 | u8 reason, |
ba159914 | 799 | unsigned char *buf) |
e48354ce NB |
800 | { |
801 | struct iscsi_cmd *cmd; | |
e48354ce | 802 | |
676687c6 | 803 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
e48354ce NB |
804 | if (!cmd) |
805 | return -1; | |
806 | ||
807 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 808 | cmd->reject_reason = reason; |
e48354ce | 809 | |
1c3d5794 | 810 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
811 | if (!cmd->buf_ptr) { |
812 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 813 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
814 | return -1; |
815 | } | |
e48354ce NB |
816 | |
817 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 818 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
819 | spin_unlock_bh(&conn->cmd_lock); |
820 | ||
821 | cmd->i_state = ISTATE_SEND_REJECT; | |
822 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
823 | ||
ba159914 | 824 | return -1; |
e48354ce | 825 | } |
d2faaefb | 826 | EXPORT_SYMBOL(iscsit_add_reject); |
e48354ce | 827 | |
ba159914 NB |
828 | static int iscsit_add_reject_from_cmd( |
829 | struct iscsi_cmd *cmd, | |
e48354ce | 830 | u8 reason, |
ba159914 NB |
831 | bool add_to_conn, |
832 | unsigned char *buf) | |
e48354ce NB |
833 | { |
834 | struct iscsi_conn *conn; | |
cfe2b621 | 835 | const bool do_put = cmd->se_cmd.se_tfo != NULL; |
e48354ce NB |
836 | |
837 | if (!cmd->conn) { | |
838 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
839 | cmd->init_task_tag); | |
840 | return -1; | |
841 | } | |
842 | conn = cmd->conn; | |
843 | ||
844 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 845 | cmd->reject_reason = reason; |
e48354ce | 846 | |
1c3d5794 | 847 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
848 | if (!cmd->buf_ptr) { |
849 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 850 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
851 | return -1; |
852 | } | |
e48354ce NB |
853 | |
854 | if (add_to_conn) { | |
855 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 856 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
857 | spin_unlock_bh(&conn->cmd_lock); |
858 | } | |
859 | ||
860 | cmd->i_state = ISTATE_SEND_REJECT; | |
861 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
3e1c81a9 NB |
862 | /* |
863 | * Perform the kref_put now if se_cmd has already been setup by | |
864 | * scsit_setup_scsi_cmd() | |
865 | */ | |
cfe2b621 | 866 | if (do_put) { |
3e1c81a9 | 867 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); |
afc16604 | 868 | target_put_sess_cmd(&cmd->se_cmd); |
3e1c81a9 | 869 | } |
ba159914 NB |
870 | return -1; |
871 | } | |
e48354ce | 872 | |
ba159914 NB |
873 | static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, |
874 | unsigned char *buf) | |
875 | { | |
876 | return iscsit_add_reject_from_cmd(cmd, reason, true, buf); | |
877 | } | |
878 | ||
879 | int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) | |
880 | { | |
881 | return iscsit_add_reject_from_cmd(cmd, reason, false, buf); | |
e48354ce | 882 | } |
d2faaefb | 883 | EXPORT_SYMBOL(iscsit_reject_cmd); |
e48354ce NB |
884 | |
885 | /* | |
886 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 887 | * kernel sockets to copy data in/out. |
e48354ce NB |
888 | */ |
889 | static int iscsit_map_iovec( | |
890 | struct iscsi_cmd *cmd, | |
891 | struct kvec *iov, | |
892 | u32 data_offset, | |
893 | u32 data_length) | |
894 | { | |
895 | u32 i = 0; | |
896 | struct scatterlist *sg; | |
897 | unsigned int page_off; | |
898 | ||
899 | /* | |
bfb79eac | 900 | * We know each entry in t_data_sg contains a page. |
e48354ce | 901 | */ |
2b16509c IH |
902 | u32 ent = data_offset / PAGE_SIZE; |
903 | ||
904 | if (ent >= cmd->se_cmd.t_data_nents) { | |
905 | pr_err("Initial page entry out-of-bounds\n"); | |
906 | return -1; | |
907 | } | |
908 | ||
909 | sg = &cmd->se_cmd.t_data_sg[ent]; | |
e48354ce NB |
910 | page_off = (data_offset % PAGE_SIZE); |
911 | ||
912 | cmd->first_data_sg = sg; | |
913 | cmd->first_data_sg_off = page_off; | |
914 | ||
915 | while (data_length) { | |
916 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
917 | ||
918 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
919 | iov[i].iov_len = cur_len; | |
920 | ||
921 | data_length -= cur_len; | |
922 | page_off = 0; | |
923 | sg = sg_next(sg); | |
924 | i++; | |
925 | } | |
926 | ||
927 | cmd->kmapped_nents = i; | |
928 | ||
929 | return i; | |
930 | } | |
931 | ||
932 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
933 | { | |
934 | u32 i; | |
935 | struct scatterlist *sg; | |
936 | ||
937 | sg = cmd->first_data_sg; | |
938 | ||
939 | for (i = 0; i < cmd->kmapped_nents; i++) | |
940 | kunmap(sg_page(&sg[i])); | |
941 | } | |
942 | ||
943 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
944 | { | |
f56cbbb4 NB |
945 | LIST_HEAD(ack_list); |
946 | struct iscsi_cmd *cmd, *cmd_p; | |
e48354ce NB |
947 | |
948 | conn->exp_statsn = exp_statsn; | |
949 | ||
3e1c81a9 NB |
950 | if (conn->sess->sess_ops->RDMAExtensions) |
951 | return; | |
952 | ||
e48354ce | 953 | spin_lock_bh(&conn->cmd_lock); |
f56cbbb4 | 954 | list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
955 | spin_lock(&cmd->istate_lock); |
956 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 957 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
958 | cmd->i_state = ISTATE_REMOVE; |
959 | spin_unlock(&cmd->istate_lock); | |
f56cbbb4 | 960 | list_move_tail(&cmd->i_conn_node, &ack_list); |
e48354ce NB |
961 | continue; |
962 | } | |
963 | spin_unlock(&cmd->istate_lock); | |
964 | } | |
965 | spin_unlock_bh(&conn->cmd_lock); | |
f56cbbb4 NB |
966 | |
967 | list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { | |
5159d763 | 968 | list_del_init(&cmd->i_conn_node); |
f56cbbb4 NB |
969 | iscsit_free_cmd(cmd, false); |
970 | } | |
e48354ce NB |
971 | } |
972 | ||
973 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
974 | { | |
f80e8ed3 | 975 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 976 | |
c0427f15 | 977 | iov_count += ISCSI_IOV_DATA_BUFFER; |
f1725110 | 978 | cmd->iov_data = kcalloc(iov_count, sizeof(*cmd->iov_data), GFP_KERNEL); |
c46e22f1 | 979 | if (!cmd->iov_data) |
e48354ce | 980 | return -ENOMEM; |
e48354ce NB |
981 | |
982 | cmd->orig_iov_data_count = iov_count; | |
983 | return 0; | |
984 | } | |
985 | ||
3e1c81a9 NB |
986 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
987 | unsigned char *buf) | |
e48354ce | 988 | { |
3e1c81a9 | 989 | int data_direction, payload_length; |
e48354ce | 990 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
991 | int iscsi_task_attr; |
992 | int sam_task_attr; | |
e48354ce | 993 | |
04f3b31b | 994 | atomic_long_inc(&conn->sess->cmd_pdus); |
e48354ce NB |
995 | |
996 | hdr = (struct iscsi_scsi_req *) buf; | |
997 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
998 | |
999 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
1000 | ||
1001 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
1002 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
1003 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
1004 | " not set. Bad iSCSI Initiator.\n"); | |
ba159914 NB |
1005 | return iscsit_add_reject_cmd(cmd, |
1006 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1007 | } |
1008 | ||
1009 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
1010 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
1011 | /* | |
4454b66c NB |
1012 | * From RFC-3720 Section 10.3.1: |
1013 | * | |
1014 | * "Either or both of R and W MAY be 1 when either the | |
1015 | * Expected Data Transfer Length and/or Bidirectional Read | |
1016 | * Expected Data Transfer Length are 0" | |
1017 | * | |
1018 | * For this case, go ahead and clear the unnecssary bits | |
1019 | * to avoid any confusion with ->data_direction. | |
e48354ce | 1020 | */ |
4454b66c NB |
1021 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; |
1022 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
e48354ce | 1023 | |
4454b66c | 1024 | pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" |
e48354ce | 1025 | " set when Expected Data Transfer Length is 0 for" |
4454b66c | 1026 | " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); |
e48354ce | 1027 | } |
e48354ce NB |
1028 | |
1029 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
1030 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
1031 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
1032 | " MUST be set if Expected Data Transfer Length is not 0." | |
1033 | " Bad iSCSI Initiator\n"); | |
ba159914 NB |
1034 | return iscsit_add_reject_cmd(cmd, |
1035 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1036 | } |
1037 | ||
1038 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
1039 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
1040 | pr_err("Bidirectional operations not supported!\n"); | |
ba159914 NB |
1041 | return iscsit_add_reject_cmd(cmd, |
1042 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1043 | } |
1044 | ||
1045 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1046 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
1047 | " Scsi Command PDU.\n"); | |
ba159914 NB |
1048 | return iscsit_add_reject_cmd(cmd, |
1049 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1050 | } |
1051 | ||
1052 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
1053 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
1054 | " protocol error.\n", payload_length); | |
ba159914 NB |
1055 | return iscsit_add_reject_cmd(cmd, |
1056 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1057 | } |
1058 | ||
ba159914 | 1059 | if ((be32_to_cpu(hdr->data_length) == payload_length) && |
e48354ce NB |
1060 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
1061 | pr_err("Expected Data Transfer Length and Length of" | |
1062 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
1063 | " bit is not set protocol error\n"); | |
ba159914 NB |
1064 | return iscsit_add_reject_cmd(cmd, |
1065 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1066 | } |
1067 | ||
50e5c87d | 1068 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
1069 | pr_err("DataSegmentLength: %u is greater than" |
1070 | " EDTL: %u, protocol error.\n", payload_length, | |
1071 | hdr->data_length); | |
ba159914 NB |
1072 | return iscsit_add_reject_cmd(cmd, |
1073 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1074 | } |
1075 | ||
21f5aa7e | 1076 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1077 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1078 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
1079 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1080 | return iscsit_add_reject_cmd(cmd, |
1081 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1082 | } |
1083 | ||
1084 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
1085 | pr_err("DataSegmentLength: %u is greater than" | |
1086 | " FirstBurstLength: %u, protocol error.\n", | |
1087 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
ba159914 NB |
1088 | return iscsit_add_reject_cmd(cmd, |
1089 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1090 | } |
1091 | ||
1092 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
1093 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
1094 | DMA_NONE; | |
1095 | ||
d28b1169 | 1096 | cmd->data_direction = data_direction; |
d28b1169 AG |
1097 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
1098 | /* | |
1099 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
1100 | */ | |
1101 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
1102 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
68d81f40 | 1103 | sam_task_attr = TCM_SIMPLE_TAG; |
d28b1169 | 1104 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) |
68d81f40 | 1105 | sam_task_attr = TCM_ORDERED_TAG; |
d28b1169 | 1106 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) |
68d81f40 | 1107 | sam_task_attr = TCM_HEAD_TAG; |
d28b1169 | 1108 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) |
68d81f40 | 1109 | sam_task_attr = TCM_ACA_TAG; |
d28b1169 AG |
1110 | else { |
1111 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
68d81f40 CH |
1112 | " TCM_SIMPLE_TAG\n", iscsi_task_attr); |
1113 | sam_task_attr = TCM_SIMPLE_TAG; | |
d28b1169 AG |
1114 | } |
1115 | ||
e48354ce NB |
1116 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
1117 | cmd->i_state = ISTATE_NEW_CMD; | |
1118 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1119 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
1120 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
1121 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
1122 | if (cmd->unsolicited_data) | |
1123 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
1124 | ||
1125 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
9547308b | 1126 | if (hdr->flags & ISCSI_FLAG_CMD_READ) |
c1e34b64 | 1127 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); |
9547308b | 1128 | else |
e48354ce | 1129 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
50e5c87d CH |
1130 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1131 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1132 | cmd->first_burst_len = payload_length; |
1133 | ||
3e1c81a9 NB |
1134 | if (!conn->sess->sess_ops->RDMAExtensions && |
1135 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
1136 | struct iscsi_datain_req *dr; |
1137 | ||
1138 | dr = iscsit_allocate_datain_req(); | |
1139 | if (!dr) | |
ba159914 NB |
1140 | return iscsit_add_reject_cmd(cmd, |
1141 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1142 | |
1143 | iscsit_attach_datain_req(cmd, dr); | |
1144 | } | |
1145 | ||
065ca1e4 AG |
1146 | /* |
1147 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
1148 | */ | |
9ac8928e | 1149 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
50e5c87d CH |
1150 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
1151 | cmd->data_direction, sam_task_attr, | |
1152 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
1153 | |
1154 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
1155 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
1156 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
1157 | conn->cid); | |
1158 | ||
afc16604 | 1159 | target_get_sess_cmd(&cmd->se_cmd, true); |
065ca1e4 | 1160 | |
de103c93 CH |
1161 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
1162 | scsilun_to_int(&hdr->lun)); | |
1163 | if (cmd->sense_reason) | |
1164 | goto attach_cmd; | |
1165 | ||
649ee054 BVA |
1166 | /* only used for printks or comparing with ->ref_task_tag */ |
1167 | cmd->se_cmd.tag = (__force u32)cmd->init_task_tag; | |
de103c93 CH |
1168 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); |
1169 | if (cmd->sense_reason) { | |
1170 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
ba159914 NB |
1171 | return iscsit_add_reject_cmd(cmd, |
1172 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce | 1173 | } |
de103c93 | 1174 | |
e48354ce NB |
1175 | goto attach_cmd; |
1176 | } | |
a12f41f8 | 1177 | |
de103c93 | 1178 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
ba159914 NB |
1179 | return iscsit_add_reject_cmd(cmd, |
1180 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1181 | } |
1182 | ||
1183 | attach_cmd: | |
1184 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1185 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1186 | spin_unlock_bh(&conn->cmd_lock); |
1187 | /* | |
1188 | * Check if we need to delay processing because of ALUA | |
1189 | * Active/NonOptimized primary access state.. | |
1190 | */ | |
1191 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1192 | |
3e1c81a9 NB |
1193 | return 0; |
1194 | } | |
1195 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1196 | |
0300b114 | 1197 | void iscsit_set_unsolicited_dataout(struct iscsi_cmd *cmd) |
3e1c81a9 NB |
1198 | { |
1199 | iscsit_set_dataout_sequence_values(cmd); | |
1200 | ||
1201 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1202 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1203 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1204 | } | |
0300b114 | 1205 | EXPORT_SYMBOL(iscsit_set_unsolicited_dataout); |
3e1c81a9 NB |
1206 | |
1207 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1208 | struct iscsi_scsi_req *hdr) | |
1209 | { | |
1210 | int cmdsn_ret = 0; | |
e48354ce NB |
1211 | /* |
1212 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1213 | * the Immediate Bit is not set, and no Immediate | |
1214 | * Data is attached. | |
1215 | * | |
1216 | * A PDU/CmdSN carrying Immediate Data can only | |
1217 | * be processed after the DataCRC has passed. | |
1218 | * If the DataCRC fails, the CmdSN MUST NOT | |
1219 | * be acknowledged. (See below) | |
1220 | */ | |
1221 | if (!cmd->immediate_data) { | |
561bf158 NB |
1222 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1223 | (unsigned char *)hdr, hdr->cmdsn); | |
1224 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1225 | return -1; | |
1226 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
afc16604 | 1227 | target_put_sess_cmd(&cmd->se_cmd); |
7e32da55 | 1228 | return 0; |
3e1c81a9 | 1229 | } |
e48354ce NB |
1230 | } |
1231 | ||
50e5c87d | 1232 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1233 | |
1234 | /* | |
1235 | * If no Immediate Data is attached, it's OK to return now. | |
1236 | */ | |
1237 | if (!cmd->immediate_data) { | |
3e1c81a9 | 1238 | if (!cmd->sense_reason && cmd->unsolicited_data) |
0300b114 | 1239 | iscsit_set_unsolicited_dataout(cmd); |
3e1c81a9 NB |
1240 | if (!cmd->sense_reason) |
1241 | return 0; | |
e48354ce | 1242 | |
afc16604 | 1243 | target_put_sess_cmd(&cmd->se_cmd); |
e48354ce NB |
1244 | return 0; |
1245 | } | |
1246 | ||
1247 | /* | |
3e1c81a9 NB |
1248 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1249 | * execution. These exceptions are processed in CmdSN order using | |
1250 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1251 | */ |
8fa4011e | 1252 | if (cmd->sense_reason) |
3e1c81a9 | 1253 | return 1; |
e48354ce NB |
1254 | /* |
1255 | * Call directly into transport_generic_new_cmd() to perform | |
1256 | * the backend memory allocation. | |
1257 | */ | |
de103c93 | 1258 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
561bf158 | 1259 | if (cmd->sense_reason) |
3e1c81a9 | 1260 | return 1; |
e48354ce | 1261 | |
3e1c81a9 NB |
1262 | return 0; |
1263 | } | |
1264 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1265 | ||
1266 | static int | |
1267 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1268 | bool dump_payload) | |
1269 | { | |
1270 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; | |
1271 | /* | |
1272 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1273 | */ | |
0bcc297e | 1274 | if (dump_payload) |
3e1c81a9 | 1275 | goto after_immediate_data; |
abb85a9b NB |
1276 | /* |
1277 | * Check for underflow case where both EDTL and immediate data payload | |
1278 | * exceeds what is presented by CDB's TRANSFER LENGTH, and what has | |
1279 | * already been set in target_cmd_size_check() as se_cmd->data_length. | |
1280 | * | |
1281 | * For this special case, fail the command and dump the immediate data | |
1282 | * payload. | |
1283 | */ | |
1284 | if (cmd->first_burst_len > cmd->se_cmd.data_length) { | |
1285 | cmd->sense_reason = TCM_INVALID_CDB_FIELD; | |
1286 | goto after_immediate_data; | |
1287 | } | |
3e1c81a9 NB |
1288 | |
1289 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1290 | cmd->first_burst_len); | |
e48354ce NB |
1291 | after_immediate_data: |
1292 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1293 | /* | |
1294 | * A PDU/CmdSN carrying Immediate Data passed | |
1295 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1296 | * Immediate Bit is not set. | |
1297 | */ | |
561bf158 NB |
1298 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, |
1299 | (unsigned char *)hdr, hdr->cmdsn); | |
9d86a2be | 1300 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
561bf158 | 1301 | return -1; |
3e1c81a9 | 1302 | |
9d86a2be | 1303 | if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
561bf158 NB |
1304 | int rc; |
1305 | ||
1306 | rc = iscsit_dump_data_payload(cmd->conn, | |
1307 | cmd->first_burst_len, 1); | |
afc16604 | 1308 | target_put_sess_cmd(&cmd->se_cmd); |
561bf158 | 1309 | return rc; |
3e1c81a9 | 1310 | } else if (cmd->unsolicited_data) |
0300b114 | 1311 | iscsit_set_unsolicited_dataout(cmd); |
e48354ce | 1312 | |
e48354ce NB |
1313 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { |
1314 | /* | |
1315 | * Immediate Data failed DataCRC and ERL>=1, | |
1316 | * silently drop this PDU and let the initiator | |
1317 | * plug the CmdSN gap. | |
1318 | * | |
1319 | * FIXME: Send Unsolicited NOPIN with reserved | |
1320 | * TTT here to help the initiator figure out | |
1321 | * the missing CmdSN, although they should be | |
1322 | * intelligent enough to determine the missing | |
1323 | * CmdSN and issue a retry to plug the sequence. | |
1324 | */ | |
1325 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1326 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1327 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1328 | return -1; | |
1329 | ||
1330 | return 0; | |
1331 | } | |
1332 | ||
3e1c81a9 NB |
1333 | static int |
1334 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1335 | unsigned char *buf) | |
1336 | { | |
1337 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1338 | int rc, immed_data; | |
1339 | bool dump_payload = false; | |
1340 | ||
1341 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1342 | if (rc < 0) | |
561bf158 | 1343 | return 0; |
3e1c81a9 NB |
1344 | /* |
1345 | * Allocation iovecs needed for struct socket operations for | |
1346 | * traditional iSCSI block I/O. | |
1347 | */ | |
1348 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
b815fc12 | 1349 | return iscsit_reject_cmd(cmd, |
ba159914 | 1350 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); |
3e1c81a9 NB |
1351 | } |
1352 | immed_data = cmd->immediate_data; | |
1353 | ||
1354 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1355 | if (rc < 0) | |
1356 | return rc; | |
1357 | else if (rc > 0) | |
1358 | dump_payload = true; | |
1359 | ||
1360 | if (!immed_data) | |
1361 | return 0; | |
1362 | ||
1363 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1364 | } | |
1365 | ||
e48354ce | 1366 | static u32 iscsit_do_crypto_hash_sg( |
69110e3c | 1367 | struct ahash_request *hash, |
e48354ce NB |
1368 | struct iscsi_cmd *cmd, |
1369 | u32 data_offset, | |
1370 | u32 data_length, | |
1371 | u32 padding, | |
1372 | u8 *pad_bytes) | |
1373 | { | |
1374 | u32 data_crc; | |
e48354ce NB |
1375 | struct scatterlist *sg; |
1376 | unsigned int page_off; | |
1377 | ||
69110e3c | 1378 | crypto_ahash_init(hash); |
e48354ce NB |
1379 | |
1380 | sg = cmd->first_data_sg; | |
1381 | page_off = cmd->first_data_sg_off; | |
1382 | ||
e48354ce | 1383 | while (data_length) { |
aa75679c | 1384 | u32 cur_len = min_t(u32, data_length, (sg->length - page_off)); |
e48354ce | 1385 | |
69110e3c HX |
1386 | ahash_request_set_crypt(hash, sg, NULL, cur_len); |
1387 | crypto_ahash_update(hash); | |
e48354ce NB |
1388 | |
1389 | data_length -= cur_len; | |
1390 | page_off = 0; | |
aa75679c AP |
1391 | /* iscsit_map_iovec has already checked for invalid sg pointers */ |
1392 | sg = sg_next(sg); | |
e48354ce NB |
1393 | } |
1394 | ||
1395 | if (padding) { | |
1396 | struct scatterlist pad_sg; | |
1397 | ||
1398 | sg_init_one(&pad_sg, pad_bytes, padding); | |
69110e3c HX |
1399 | ahash_request_set_crypt(hash, &pad_sg, (u8 *)&data_crc, |
1400 | padding); | |
1401 | crypto_ahash_finup(hash); | |
1402 | } else { | |
1403 | ahash_request_set_crypt(hash, NULL, (u8 *)&data_crc, 0); | |
1404 | crypto_ahash_final(hash); | |
e48354ce | 1405 | } |
e48354ce NB |
1406 | |
1407 | return data_crc; | |
1408 | } | |
1409 | ||
e1dfb21f BVA |
1410 | static void iscsit_do_crypto_hash_buf(struct ahash_request *hash, |
1411 | const void *buf, u32 payload_length, u32 padding, | |
1412 | const void *pad_bytes, void *data_crc) | |
e48354ce | 1413 | { |
69110e3c | 1414 | struct scatterlist sg[2]; |
e48354ce | 1415 | |
69110e3c HX |
1416 | sg_init_table(sg, ARRAY_SIZE(sg)); |
1417 | sg_set_buf(sg, buf, payload_length); | |
679fcae4 LA |
1418 | if (padding) |
1419 | sg_set_buf(sg + 1, pad_bytes, padding); | |
e48354ce | 1420 | |
69110e3c | 1421 | ahash_request_set_crypt(hash, sg, data_crc, payload_length + padding); |
e48354ce | 1422 | |
69110e3c | 1423 | crypto_ahash_digest(hash); |
e48354ce NB |
1424 | } |
1425 | ||
3e1c81a9 | 1426 | int |
9a584bf9 VP |
1427 | __iscsit_check_dataout_hdr(struct iscsi_conn *conn, void *buf, |
1428 | struct iscsi_cmd *cmd, u32 payload_length, | |
1429 | bool *success) | |
e48354ce | 1430 | { |
9a584bf9 | 1431 | struct iscsi_data *hdr = buf; |
e48354ce | 1432 | struct se_cmd *se_cmd; |
3e1c81a9 | 1433 | int rc; |
e48354ce | 1434 | |
e48354ce | 1435 | /* iSCSI write */ |
04f3b31b | 1436 | atomic_long_add(payload_length, &conn->sess->rx_data_octets); |
e48354ce | 1437 | |
e48354ce NB |
1438 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," |
1439 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1440 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1441 | payload_length, conn->cid); |
1442 | ||
1443 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1444 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1445 | " last DataOUT received, dumping payload\n", | |
1446 | cmd->init_task_tag); | |
1447 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1448 | } | |
1449 | ||
1450 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1451 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1452 | " NON-WRITE command.\n", cmd->init_task_tag); | |
97c99b47 | 1453 | return iscsit_dump_data_payload(conn, payload_length, 1); |
e48354ce NB |
1454 | } |
1455 | se_cmd = &cmd->se_cmd; | |
1456 | iscsit_mod_dataout_timer(cmd); | |
1457 | ||
50e5c87d | 1458 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
de3493ae BVA |
1459 | pr_err("DataOut Offset: %u, Length %u greater than iSCSI Command EDTL %u, protocol error.\n", |
1460 | be32_to_cpu(hdr->offset), payload_length, | |
1461 | cmd->se_cmd.data_length); | |
ba159914 | 1462 | return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); |
e48354ce NB |
1463 | } |
1464 | ||
1465 | if (cmd->unsolicited_data) { | |
1466 | int dump_unsolicited_data = 0; | |
1467 | ||
1468 | if (conn->sess->sess_ops->InitialR2T) { | |
1469 | pr_err("Received unexpected unsolicited data" | |
1470 | " while InitialR2T=Yes, protocol error.\n"); | |
1471 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1472 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1473 | return -1; | |
1474 | } | |
1475 | /* | |
1476 | * Special case for dealing with Unsolicited DataOUT | |
1477 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1478 | * failures; | |
1479 | */ | |
1480 | ||
1481 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
e48354ce | 1482 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); |
de103c93 | 1483 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce | 1484 | dump_unsolicited_data = 1; |
e48354ce NB |
1485 | |
1486 | if (dump_unsolicited_data) { | |
1487 | /* | |
1488 | * Check if a delayed TASK_ABORTED status needs to | |
1489 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
5a342521 | 1490 | * received with the unsolicited data out. |
e48354ce NB |
1491 | */ |
1492 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1493 | iscsit_stop_dataout_timer(cmd); | |
1494 | ||
e48354ce NB |
1495 | return iscsit_dump_data_payload(conn, payload_length, 1); |
1496 | } | |
1497 | } else { | |
1498 | /* | |
1499 | * For the normal solicited data path: | |
1500 | * | |
1501 | * Check for a delayed TASK_ABORTED status and dump any | |
1502 | * incoming data out payload if one exists. Also, when the | |
1503 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1504 | * data out sequence, we decrement outstanding_r2ts. Once | |
1505 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1506 | * TASK_ABORTED status. | |
1507 | */ | |
7d680f3b | 1508 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
aaa00cc9 BVA |
1509 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL && |
1510 | --cmd->outstanding_r2ts < 1) | |
1511 | iscsit_stop_dataout_timer(cmd); | |
e48354ce NB |
1512 | |
1513 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1514 | } | |
1515 | } | |
1516 | /* | |
0d5efb8a | 1517 | * Perform DataSN, DataSequenceInOrder, DataPDUInOrder, and |
e48354ce NB |
1518 | * within-command recovery checks before receiving the payload. |
1519 | */ | |
3e1c81a9 NB |
1520 | rc = iscsit_check_pre_dataout(cmd, buf); |
1521 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1522 | return 0; |
3e1c81a9 | 1523 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce | 1524 | return -1; |
9a584bf9 | 1525 | *success = true; |
3e1c81a9 NB |
1526 | return 0; |
1527 | } | |
9a584bf9 VP |
1528 | EXPORT_SYMBOL(__iscsit_check_dataout_hdr); |
1529 | ||
1530 | int | |
1531 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, void *buf, | |
1532 | struct iscsi_cmd **out_cmd) | |
1533 | { | |
1534 | struct iscsi_data *hdr = buf; | |
1535 | struct iscsi_cmd *cmd; | |
1536 | u32 payload_length = ntoh24(hdr->dlength); | |
1537 | int rc; | |
1538 | bool success = false; | |
1539 | ||
1540 | if (!payload_length) { | |
1541 | pr_warn_ratelimited("DataOUT payload is ZERO, ignoring.\n"); | |
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { | |
1546 | pr_err_ratelimited("DataSegmentLength: %u is greater than" | |
1547 | " MaxXmitDataSegmentLength: %u\n", payload_length, | |
1548 | conn->conn_ops->MaxXmitDataSegmentLength); | |
1549 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, buf); | |
1550 | } | |
1551 | ||
1552 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, payload_length); | |
1553 | if (!cmd) | |
1554 | return 0; | |
1555 | ||
1556 | rc = __iscsit_check_dataout_hdr(conn, buf, cmd, payload_length, &success); | |
1557 | ||
1558 | if (success) | |
1559 | *out_cmd = cmd; | |
1560 | ||
1561 | return rc; | |
1562 | } | |
3e1c81a9 NB |
1563 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); |
1564 | ||
1565 | static int | |
1566 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1567 | struct iscsi_data *hdr) | |
1568 | { | |
1569 | struct kvec *iov; | |
1570 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1571 | u32 payload_length = ntoh24(hdr->dlength); | |
1572 | int iov_ret, data_crc_failed = 0; | |
1573 | ||
e48354ce NB |
1574 | rx_size += payload_length; |
1575 | iov = &cmd->iov_data[0]; | |
1576 | ||
50e5c87d CH |
1577 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1578 | payload_length); | |
e48354ce NB |
1579 | if (iov_ret < 0) |
1580 | return -1; | |
1581 | ||
1582 | iov_count += iov_ret; | |
1583 | ||
1584 | padding = ((-payload_length) & 3); | |
1585 | if (padding != 0) { | |
1586 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1587 | iov[iov_count++].iov_len = padding; | |
1588 | rx_size += padding; | |
1589 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1590 | } | |
1591 | ||
1592 | if (conn->conn_ops->DataDigest) { | |
1593 | iov[iov_count].iov_base = &checksum; | |
1594 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1595 | rx_size += ISCSI_CRC_LEN; | |
1596 | } | |
1597 | ||
1598 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1599 | ||
1600 | iscsit_unmap_iovec(cmd); | |
1601 | ||
1602 | if (rx_got != rx_size) | |
1603 | return -1; | |
1604 | ||
1605 | if (conn->conn_ops->DataDigest) { | |
1606 | u32 data_crc; | |
1607 | ||
69110e3c | 1608 | data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd, |
50e5c87d CH |
1609 | be32_to_cpu(hdr->offset), |
1610 | payload_length, padding, | |
e48354ce NB |
1611 | cmd->pad_bytes); |
1612 | ||
1613 | if (checksum != data_crc) { | |
1614 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1615 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1616 | " does not match computed 0x%08x\n", | |
1617 | hdr->itt, hdr->offset, payload_length, | |
1618 | hdr->datasn, checksum, data_crc); | |
1619 | data_crc_failed = 1; | |
1620 | } else { | |
1621 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1622 | " %u bytes of Data Out\n", checksum, | |
1623 | payload_length); | |
1624 | } | |
1625 | } | |
3e1c81a9 NB |
1626 | |
1627 | return data_crc_failed; | |
1628 | } | |
1629 | ||
1630 | int | |
1631 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1632 | bool data_crc_failed) | |
1633 | { | |
1634 | struct iscsi_conn *conn = cmd->conn; | |
1635 | int rc, ooo_cmdsn; | |
e48354ce NB |
1636 | /* |
1637 | * Increment post receive data and CRC values or perform | |
1638 | * within-command recovery. | |
1639 | */ | |
3e1c81a9 NB |
1640 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1641 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1642 | return 0; |
3e1c81a9 | 1643 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1644 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1645 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1646 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1647 | /* |
1648 | * Handle extra special case for out of order | |
1649 | * Unsolicited Data Out. | |
1650 | */ | |
1651 | spin_lock_bh(&cmd->istate_lock); | |
1652 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1653 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1654 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1655 | spin_unlock_bh(&cmd->istate_lock); | |
1656 | ||
1657 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1658 | if (ooo_cmdsn) |
1659 | return 0; | |
1660 | target_execute_cmd(&cmd->se_cmd); | |
1661 | return 0; | |
e48354ce NB |
1662 | } else /* DATAOUT_CANNOT_RECOVER */ |
1663 | return -1; | |
1664 | ||
1665 | return 0; | |
1666 | } | |
3e1c81a9 | 1667 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1668 | |
3e1c81a9 NB |
1669 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1670 | { | |
dbcbc95c | 1671 | struct iscsi_cmd *cmd = NULL; |
3e1c81a9 NB |
1672 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1673 | int rc; | |
1674 | bool data_crc_failed = false; | |
1675 | ||
1676 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1677 | if (rc < 0) | |
561bf158 | 1678 | return 0; |
3e1c81a9 NB |
1679 | else if (!cmd) |
1680 | return 0; | |
1681 | ||
1682 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1683 | if (rc < 0) | |
1684 | return rc; | |
1685 | else if (rc > 0) | |
1686 | data_crc_failed = true; | |
1687 | ||
1688 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1689 | } | |
1690 | ||
778de368 NB |
1691 | int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
1692 | struct iscsi_nopout *hdr) | |
e48354ce | 1693 | { |
778de368 | 1694 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1695 | |
a3662605 AH |
1696 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { |
1697 | pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n"); | |
1698 | if (!cmd) | |
1699 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1700 | (unsigned char *)hdr); | |
1701 | ||
1702 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, | |
1703 | (unsigned char *)hdr); | |
1704 | } | |
1705 | ||
66c7db68 | 1706 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1707 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1708 | " not set, protocol error.\n"); | |
28aaa950 NB |
1709 | if (!cmd) |
1710 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1711 | (unsigned char *)hdr); | |
1712 | ||
ba159914 NB |
1713 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1714 | (unsigned char *)hdr); | |
e48354ce NB |
1715 | } |
1716 | ||
21f5aa7e | 1717 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1718 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1719 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1720 | " error.\n", payload_length, |
21f5aa7e | 1721 | conn->conn_ops->MaxXmitDataSegmentLength); |
28aaa950 NB |
1722 | if (!cmd) |
1723 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1724 | (unsigned char *)hdr); | |
1725 | ||
ba159914 NB |
1726 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1727 | (unsigned char *)hdr); | |
e48354ce NB |
1728 | } |
1729 | ||
3e1c81a9 | 1730 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1731 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1732 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1733 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1734 | payload_length); | |
1735 | /* | |
1736 | * This is not a response to a Unsolicited NopIN, which means | |
1737 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1738 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1739 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1740 | * can contain ping data. | |
1741 | */ | |
50e5c87d | 1742 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1743 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; |
1744 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1745 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1746 | 1 : 0); | |
1747 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1748 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1749 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1750 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1751 | cmd->data_direction = DMA_NONE; |
1752 | } | |
1753 | ||
778de368 NB |
1754 | return 0; |
1755 | } | |
1756 | EXPORT_SYMBOL(iscsit_setup_nop_out); | |
1757 | ||
1758 | int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1759 | struct iscsi_nopout *hdr) | |
1760 | { | |
1761 | struct iscsi_cmd *cmd_p = NULL; | |
1762 | int cmdsn_ret = 0; | |
1763 | /* | |
1764 | * Initiator is expecting a NopIN ping reply.. | |
1765 | */ | |
1766 | if (hdr->itt != RESERVED_ITT) { | |
7cbfcc95 NB |
1767 | if (!cmd) |
1768 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1769 | (unsigned char *)hdr); | |
778de368 NB |
1770 | |
1771 | spin_lock_bh(&conn->cmd_lock); | |
1772 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
1773 | spin_unlock_bh(&conn->cmd_lock); | |
1774 | ||
1775 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
1776 | ||
1777 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1778 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1779 | cmd->i_state); | |
1780 | return 0; | |
1781 | } | |
1782 | ||
561bf158 NB |
1783 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1784 | (unsigned char *)hdr, hdr->cmdsn); | |
778de368 NB |
1785 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1786 | return 0; | |
778de368 | 1787 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1788 | return -1; |
778de368 NB |
1789 | |
1790 | return 0; | |
1791 | } | |
1792 | /* | |
1793 | * This was a response to a unsolicited NOPIN ping. | |
1794 | */ | |
1795 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { | |
1796 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); | |
1797 | if (!cmd_p) | |
1798 | return -EINVAL; | |
1799 | ||
1800 | iscsit_stop_nopin_response_timer(conn); | |
1801 | ||
1802 | cmd_p->i_state = ISTATE_REMOVE; | |
1803 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
1804 | ||
1805 | iscsit_start_nopin_timer(conn); | |
1806 | return 0; | |
1807 | } | |
1808 | /* | |
1809 | * Otherwise, initiator is not expecting a NOPIN is response. | |
1810 | * Just ignore for now. | |
1811 | */ | |
1a40f0a3 VP |
1812 | |
1813 | if (cmd) | |
1814 | iscsit_free_cmd(cmd, false); | |
1815 | ||
778de368 NB |
1816 | return 0; |
1817 | } | |
1818 | EXPORT_SYMBOL(iscsit_process_nop_out); | |
1819 | ||
1820 | static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1821 | unsigned char *buf) | |
1822 | { | |
1823 | unsigned char *ping_data = NULL; | |
1824 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1825 | struct kvec *iov = NULL; | |
1826 | u32 payload_length = ntoh24(hdr->dlength); | |
1827 | int ret; | |
1828 | ||
1829 | ret = iscsit_setup_nop_out(conn, cmd, hdr); | |
1830 | if (ret < 0) | |
561bf158 | 1831 | return 0; |
778de368 NB |
1832 | /* |
1833 | * Handle NOP-OUT payload for traditional iSCSI sockets | |
1834 | */ | |
50e5c87d | 1835 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
778de368 NB |
1836 | u32 checksum, data_crc, padding = 0; |
1837 | int niov = 0, rx_got, rx_size = payload_length; | |
1838 | ||
e48354ce NB |
1839 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); |
1840 | if (!ping_data) { | |
e48354ce NB |
1841 | ret = -1; |
1842 | goto out; | |
1843 | } | |
1844 | ||
1845 | iov = &cmd->iov_misc[0]; | |
1846 | iov[niov].iov_base = ping_data; | |
1847 | iov[niov++].iov_len = payload_length; | |
1848 | ||
1849 | padding = ((-payload_length) & 3); | |
1850 | if (padding != 0) { | |
1851 | pr_debug("Receiving %u additional bytes" | |
1852 | " for padding.\n", padding); | |
1853 | iov[niov].iov_base = &cmd->pad_bytes; | |
1854 | iov[niov++].iov_len = padding; | |
1855 | rx_size += padding; | |
1856 | } | |
1857 | if (conn->conn_ops->DataDigest) { | |
1858 | iov[niov].iov_base = &checksum; | |
1859 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1860 | rx_size += ISCSI_CRC_LEN; | |
1861 | } | |
1862 | ||
1863 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1864 | if (rx_got != rx_size) { | |
1865 | ret = -1; | |
1866 | goto out; | |
1867 | } | |
1868 | ||
1869 | if (conn->conn_ops->DataDigest) { | |
e1dfb21f BVA |
1870 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, ping_data, |
1871 | payload_length, padding, | |
1872 | cmd->pad_bytes, &data_crc); | |
e48354ce NB |
1873 | |
1874 | if (checksum != data_crc) { | |
1875 | pr_err("Ping data CRC32C DataDigest" | |
1876 | " 0x%08x does not match computed 0x%08x\n", | |
1877 | checksum, data_crc); | |
1878 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1879 | pr_err("Unable to recover from" | |
1880 | " NOPOUT Ping DataCRC failure while in" | |
1881 | " ERL=0.\n"); | |
1882 | ret = -1; | |
1883 | goto out; | |
1884 | } else { | |
1885 | /* | |
1886 | * Silently drop this PDU and let the | |
1887 | * initiator plug the CmdSN gap. | |
1888 | */ | |
1889 | pr_debug("Dropping NOPOUT" | |
1890 | " Command CmdSN: 0x%08x due to" | |
1891 | " DataCRC error.\n", hdr->cmdsn); | |
1892 | ret = 0; | |
1893 | goto out; | |
1894 | } | |
1895 | } else { | |
1896 | pr_debug("Got CRC32C DataDigest" | |
1897 | " 0x%08x for %u bytes of ping data.\n", | |
1898 | checksum, payload_length); | |
1899 | } | |
1900 | } | |
1901 | ||
1902 | ping_data[payload_length] = '\0'; | |
1903 | /* | |
1904 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1905 | */ | |
8359cf43 | 1906 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1907 | cmd->buf_ptr_size = payload_length; |
1908 | ||
1909 | pr_debug("Got %u bytes of NOPOUT ping" | |
1910 | " data.\n", payload_length); | |
1911 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1912 | } | |
1913 | ||
778de368 | 1914 | return iscsit_process_nop_out(conn, cmd, hdr); |
e48354ce NB |
1915 | out: |
1916 | if (cmd) | |
aafc9d15 | 1917 | iscsit_free_cmd(cmd, false); |
778de368 | 1918 | |
e48354ce NB |
1919 | kfree(ping_data); |
1920 | return ret; | |
1921 | } | |
1922 | ||
e381fe9e BVA |
1923 | static enum tcm_tmreq_table iscsit_convert_tmf(u8 iscsi_tmf) |
1924 | { | |
1925 | switch (iscsi_tmf) { | |
1926 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1927 | return TMR_ABORT_TASK; | |
1928 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1929 | return TMR_ABORT_TASK_SET; | |
1930 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1931 | return TMR_CLEAR_ACA; | |
1932 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1933 | return TMR_CLEAR_TASK_SET; | |
1934 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1935 | return TMR_LUN_RESET; | |
1936 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1937 | return TMR_TARGET_WARM_RESET; | |
1938 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1939 | return TMR_TARGET_COLD_RESET; | |
1940 | default: | |
1941 | return TMR_UNKNOWN; | |
1942 | } | |
1943 | } | |
1944 | ||
3e1c81a9 NB |
1945 | int |
1946 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1947 | unsigned char *buf) | |
e48354ce | 1948 | { |
e48354ce NB |
1949 | struct se_tmr_req *se_tmr; |
1950 | struct iscsi_tmr_req *tmr_req; | |
1951 | struct iscsi_tm *hdr; | |
186a9647 | 1952 | int out_of_order_cmdsn = 0, ret; |
59b6986d | 1953 | u8 function, tcm_function = TMR_UNKNOWN; |
e48354ce NB |
1954 | |
1955 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1956 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1957 | function = hdr->flags; | |
1958 | ||
1959 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1960 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1961 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1962 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1963 | ||
1964 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1965 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1966 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1967 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1968 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1969 | } |
1970 | ||
1971 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1972 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1973 | pr_err("Task Management Request TASK_REASSIGN not" | |
1974 | " issued as immediate command, bad iSCSI Initiator" | |
1975 | "implementation\n"); | |
ba159914 NB |
1976 | return iscsit_add_reject_cmd(cmd, |
1977 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1978 | } |
1979 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1980 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1981 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1982 | |
d28b1169 | 1983 | cmd->data_direction = DMA_NONE; |
3829f381 | 1984 | cmd->tmr_req = kzalloc(sizeof(*cmd->tmr_req), GFP_KERNEL); |
ae072726 | 1985 | if (!cmd->tmr_req) { |
ba159914 NB |
1986 | return iscsit_add_reject_cmd(cmd, |
1987 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1988 | buf); | |
ae072726 NB |
1989 | } |
1990 | ||
1991 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, | |
1992 | conn->sess->se_sess, 0, DMA_NONE, | |
1993 | TCM_SIMPLE_TAG, cmd->sense_buffer + 2); | |
1994 | ||
1995 | target_get_sess_cmd(&cmd->se_cmd, true); | |
d28b1169 AG |
1996 | |
1997 | /* | |
1998 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1999 | * LIO-Target $FABRIC_MOD | |
2000 | */ | |
2001 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
e381fe9e BVA |
2002 | tcm_function = iscsit_convert_tmf(function); |
2003 | if (tcm_function == TMR_UNKNOWN) { | |
d28b1169 AG |
2004 | pr_err("Unknown iSCSI TMR Function:" |
2005 | " 0x%02x\n", function); | |
ba159914 NB |
2006 | return iscsit_add_reject_cmd(cmd, |
2007 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 | 2008 | } |
59b6986d BVA |
2009 | } |
2010 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, tcm_function, | |
2011 | GFP_KERNEL); | |
2012 | if (ret < 0) | |
2013 | return iscsit_add_reject_cmd(cmd, | |
ba159914 | 2014 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); |
d28b1169 | 2015 | |
59b6986d | 2016 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; |
e48354ce NB |
2017 | |
2018 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
2019 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
2020 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2021 | cmd->init_task_tag = hdr->itt; | |
2022 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2023 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2024 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
2025 | se_tmr = cmd->se_cmd.se_tmr_req; |
2026 | tmr_req = cmd->tmr_req; | |
2027 | /* | |
2028 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
2029 | */ | |
2030 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
2031 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
2032 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 2033 | if (ret < 0) { |
e48354ce NB |
2034 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
2035 | goto attach; | |
2036 | } | |
2037 | } | |
2038 | ||
2039 | switch (function) { | |
2040 | case ISCSI_TM_FUNC_ABORT_TASK: | |
2041 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 2042 | if (se_tmr->response) |
e48354ce | 2043 | goto attach; |
e48354ce NB |
2044 | break; |
2045 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
2046 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
2047 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
2048 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
2049 | break; | |
2050 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
2051 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
2052 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
2053 | goto attach; | |
2054 | } | |
2055 | break; | |
2056 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
2057 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
2058 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
2059 | goto attach; | |
2060 | } | |
2061 | break; | |
2062 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
2063 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
2064 | /* | |
2065 | * Perform sanity checks on the ExpDataSN only if the | |
2066 | * TASK_REASSIGN was successful. | |
2067 | */ | |
de103c93 | 2068 | if (se_tmr->response) |
e48354ce NB |
2069 | break; |
2070 | ||
2071 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
ba159914 NB |
2072 | return iscsit_add_reject_cmd(cmd, |
2073 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
2074 | break; |
2075 | default: | |
2076 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
2077 | " error.\n", function); | |
e48354ce NB |
2078 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
2079 | goto attach; | |
2080 | } | |
2081 | ||
2082 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
2083 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
2084 | se_tmr->call_transport = 1; | |
2085 | attach: | |
2086 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2087 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2088 | spin_unlock_bh(&conn->cmd_lock); |
2089 | ||
2090 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 | 2091 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
3fc9fb13 | 2092 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) { |
e48354ce | 2093 | out_of_order_cmdsn = 1; |
3fc9fb13 NB |
2094 | } else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
2095 | target_put_sess_cmd(&cmd->se_cmd); | |
e48354ce | 2096 | return 0; |
3fc9fb13 | 2097 | } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { |
ba159914 | 2098 | return -1; |
3fc9fb13 | 2099 | } |
e48354ce | 2100 | } |
50e5c87d | 2101 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 2102 | |
5a4c8666 | 2103 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
2104 | return 0; |
2105 | /* | |
2106 | * Found the referenced task, send to transport for processing. | |
2107 | */ | |
2108 | if (se_tmr->call_transport) | |
2109 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
2110 | ||
2111 | /* | |
2112 | * Could not find the referenced LUN, task, or Task Management | |
2113 | * command not authorized or supported. Change state and | |
2114 | * let the tx_thread send the response. | |
2115 | * | |
2116 | * For connection recovery, this is also the default action for | |
2117 | * TMR TASK_REASSIGN. | |
2118 | */ | |
2119 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
ae072726 | 2120 | target_put_sess_cmd(&cmd->se_cmd); |
e48354ce NB |
2121 | return 0; |
2122 | } | |
3e1c81a9 | 2123 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
2124 | |
2125 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
64534aa7 NB |
2126 | int |
2127 | iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2128 | struct iscsi_text *hdr) | |
e48354ce | 2129 | { |
64534aa7 | 2130 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 2131 | |
21f5aa7e | 2132 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 2133 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
2134 | "greater than MaxXmitDataSegmentLength %u.\n", |
2135 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
2136 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2137 | (unsigned char *)hdr); | |
e48354ce NB |
2138 | } |
2139 | ||
122f8afc NB |
2140 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || |
2141 | (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { | |
2142 | pr_err("Multi sequence text commands currently not supported\n"); | |
2143 | return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, | |
2144 | (unsigned char *)hdr); | |
2145 | } | |
2146 | ||
e48354ce NB |
2147 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," |
2148 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
2149 | hdr->exp_statsn, payload_length); | |
2150 | ||
64534aa7 NB |
2151 | cmd->iscsi_opcode = ISCSI_OP_TEXT; |
2152 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
2153 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2154 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2155 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
2156 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); | |
2157 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2158 | cmd->data_direction = DMA_NONE; | |
ea8dc5b4 | 2159 | kfree(cmd->text_in_ptr); |
e4f4e801 | 2160 | cmd->text_in_ptr = NULL; |
64534aa7 NB |
2161 | |
2162 | return 0; | |
2163 | } | |
2164 | EXPORT_SYMBOL(iscsit_setup_text_cmd); | |
2165 | ||
2166 | int | |
2167 | iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2168 | struct iscsi_text *hdr) | |
2169 | { | |
9864ca9d | 2170 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr; |
64534aa7 NB |
2171 | int cmdsn_ret; |
2172 | ||
9864ca9d | 2173 | if (!text_in) { |
e4f4e801 SG |
2174 | cmd->targ_xfer_tag = be32_to_cpu(hdr->ttt); |
2175 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) { | |
2176 | pr_err("Unable to locate text_in buffer for sendtargets" | |
2177 | " discovery\n"); | |
2178 | goto reject; | |
2179 | } | |
2180 | goto empty_sendtargets; | |
9864ca9d NB |
2181 | } |
2182 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
2183 | pr_err("Received Text Data that is not" | |
2184 | " SendTargets, cannot continue.\n"); | |
2185 | goto reject; | |
2186 | } | |
2187 | text_ptr = strchr(text_in, '='); | |
2188 | if (!text_ptr) { | |
2189 | pr_err("No \"=\" separator found in Text Data," | |
2190 | " cannot continue.\n"); | |
2191 | goto reject; | |
2192 | } | |
2193 | if (!strncmp("=All", text_ptr, 4)) { | |
8060b8dd | 2194 | cmd->cmd_flags |= ICF_SENDTARGETS_ALL; |
6665889c NB |
2195 | } else if (!strncmp("=iqn.", text_ptr, 5) || |
2196 | !strncmp("=eui.", text_ptr, 5)) { | |
8060b8dd | 2197 | cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE; |
9864ca9d NB |
2198 | } else { |
2199 | pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); | |
2200 | goto reject; | |
2201 | } | |
2202 | ||
64534aa7 NB |
2203 | spin_lock_bh(&conn->cmd_lock); |
2204 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
2205 | spin_unlock_bh(&conn->cmd_lock); | |
2206 | ||
e4f4e801 | 2207 | empty_sendtargets: |
64534aa7 NB |
2208 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
2209 | ||
2210 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 NB |
2211 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
2212 | (unsigned char *)hdr, hdr->cmdsn); | |
64534aa7 | 2213 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 NB |
2214 | return -1; |
2215 | ||
64534aa7 NB |
2216 | return 0; |
2217 | } | |
2218 | ||
2219 | return iscsit_execute_cmd(cmd, 0); | |
9864ca9d NB |
2220 | |
2221 | reject: | |
ba159914 NB |
2222 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2223 | (unsigned char *)hdr); | |
64534aa7 NB |
2224 | } |
2225 | EXPORT_SYMBOL(iscsit_process_text_cmd); | |
2226 | ||
2227 | static int | |
2228 | iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2229 | unsigned char *buf) | |
2230 | { | |
2231 | struct iscsi_text *hdr = (struct iscsi_text *)buf; | |
2232 | char *text_in = NULL; | |
2233 | u32 payload_length = ntoh24(hdr->dlength); | |
2234 | int rx_size, rc; | |
2235 | ||
2236 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
2237 | if (rc < 0) | |
561bf158 | 2238 | return 0; |
64534aa7 NB |
2239 | |
2240 | rx_size = payload_length; | |
2241 | if (payload_length) { | |
64534aa7 | 2242 | u32 checksum = 0, data_crc = 0; |
47eefded | 2243 | u32 padding = 0; |
64534aa7 | 2244 | int niov = 0, rx_got; |
47eefded | 2245 | struct kvec iov[2]; |
64534aa7 | 2246 | |
47eefded BVA |
2247 | rx_size = ALIGN(payload_length, 4); |
2248 | text_in = kzalloc(rx_size, GFP_KERNEL); | |
c46e22f1 | 2249 | if (!text_in) |
64534aa7 | 2250 | goto reject; |
c46e22f1 | 2251 | |
9864ca9d | 2252 | cmd->text_in_ptr = text_in; |
e48354ce | 2253 | |
47eefded | 2254 | memset(iov, 0, sizeof(iov)); |
e48354ce | 2255 | iov[niov].iov_base = text_in; |
47eefded | 2256 | iov[niov++].iov_len = rx_size; |
e48354ce | 2257 | |
47eefded BVA |
2258 | padding = rx_size - payload_length; |
2259 | if (padding) | |
e48354ce NB |
2260 | pr_debug("Receiving %u additional bytes" |
2261 | " for padding.\n", padding); | |
e48354ce NB |
2262 | if (conn->conn_ops->DataDigest) { |
2263 | iov[niov].iov_base = &checksum; | |
2264 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2265 | rx_size += ISCSI_CRC_LEN; | |
2266 | } | |
2267 | ||
2268 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
64534aa7 NB |
2269 | if (rx_got != rx_size) |
2270 | goto reject; | |
e48354ce NB |
2271 | |
2272 | if (conn->conn_ops->DataDigest) { | |
47eefded BVA |
2273 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
2274 | text_in, rx_size, 0, NULL, | |
2275 | &data_crc); | |
e48354ce NB |
2276 | |
2277 | if (checksum != data_crc) { | |
2278 | pr_err("Text data CRC32C DataDigest" | |
2279 | " 0x%08x does not match computed" | |
2280 | " 0x%08x\n", checksum, data_crc); | |
2281 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2282 | pr_err("Unable to recover from" | |
2283 | " Text Data digest failure while in" | |
2284 | " ERL=0.\n"); | |
64534aa7 | 2285 | goto reject; |
e48354ce NB |
2286 | } else { |
2287 | /* | |
2288 | * Silently drop this PDU and let the | |
2289 | * initiator plug the CmdSN gap. | |
2290 | */ | |
2291 | pr_debug("Dropping Text" | |
2292 | " Command CmdSN: 0x%08x due to" | |
2293 | " DataCRC error.\n", hdr->cmdsn); | |
2294 | kfree(text_in); | |
2295 | return 0; | |
2296 | } | |
2297 | } else { | |
2298 | pr_debug("Got CRC32C DataDigest" | |
2299 | " 0x%08x for %u bytes of text data.\n", | |
64534aa7 | 2300 | checksum, payload_length); |
e48354ce NB |
2301 | } |
2302 | } | |
64534aa7 | 2303 | text_in[payload_length - 1] = '\0'; |
e48354ce | 2304 | pr_debug("Successfully read %d bytes of text" |
64534aa7 | 2305 | " data.\n", payload_length); |
e48354ce NB |
2306 | } |
2307 | ||
64534aa7 | 2308 | return iscsit_process_text_cmd(conn, cmd, hdr); |
e48354ce | 2309 | |
64534aa7 | 2310 | reject: |
9864ca9d NB |
2311 | kfree(cmd->text_in_ptr); |
2312 | cmd->text_in_ptr = NULL; | |
ba159914 | 2313 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce NB |
2314 | } |
2315 | ||
2316 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2317 | { | |
2318 | struct iscsi_conn *conn_p; | |
2319 | struct iscsi_session *sess = conn->sess; | |
2320 | ||
2321 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2322 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2323 | ||
2324 | atomic_set(&sess->session_logout, 1); | |
2325 | atomic_set(&conn->conn_logout_remove, 1); | |
2326 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2327 | ||
2328 | iscsit_inc_conn_usage_count(conn); | |
2329 | iscsit_inc_session_usage_count(sess); | |
2330 | ||
2331 | spin_lock_bh(&sess->conn_lock); | |
2332 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2333 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2334 | continue; | |
2335 | ||
2336 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2337 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2338 | } | |
2339 | spin_unlock_bh(&sess->conn_lock); | |
2340 | ||
2341 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2342 | ||
2343 | return 0; | |
2344 | } | |
2345 | ||
2346 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2347 | { | |
2348 | struct iscsi_conn *l_conn; | |
2349 | struct iscsi_session *sess = conn->sess; | |
2350 | ||
2351 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2352 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2353 | ||
2354 | /* | |
2355 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2356 | * can arrive on a connection with a differing CID. | |
2357 | */ | |
2358 | if (conn->cid == cmd->logout_cid) { | |
2359 | spin_lock_bh(&conn->state_lock); | |
2360 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2361 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2362 | ||
2363 | atomic_set(&conn->conn_logout_remove, 1); | |
2364 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2365 | iscsit_inc_conn_usage_count(conn); | |
2366 | ||
2367 | spin_unlock_bh(&conn->state_lock); | |
2368 | } else { | |
2369 | /* | |
2370 | * Handle all different cid CLOSECONNECTION requests in | |
2371 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2372 | * time for any non immediate command's CmdSN to be | |
2373 | * acknowledged on the connection in question. | |
2374 | * | |
2375 | * Here we simply make sure the CID is still around. | |
2376 | */ | |
2377 | l_conn = iscsit_get_conn_from_cid(sess, | |
2378 | cmd->logout_cid); | |
2379 | if (!l_conn) { | |
2380 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2381 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2382 | cmd->i_state); | |
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | iscsit_dec_conn_usage_count(l_conn); | |
2387 | } | |
2388 | ||
2389 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2390 | ||
2391 | return 0; | |
2392 | } | |
2393 | ||
2394 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2395 | { | |
2396 | struct iscsi_session *sess = conn->sess; | |
2397 | ||
2398 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2399 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2400 | ||
2401 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2402 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2403 | " while ERL!=2.\n"); | |
2404 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2405 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2406 | return 0; | |
2407 | } | |
2408 | ||
2409 | if (conn->cid == cmd->logout_cid) { | |
2410 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2411 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2412 | cmd->logout_cid, conn->cid); | |
2413 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2414 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2419 | ||
2420 | return 0; | |
2421 | } | |
2422 | ||
3e1c81a9 NB |
2423 | int |
2424 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2425 | unsigned char *buf) | |
e48354ce NB |
2426 | { |
2427 | int cmdsn_ret, logout_remove = 0; | |
2428 | u8 reason_code = 0; | |
e48354ce NB |
2429 | struct iscsi_logout *hdr; |
2430 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2431 | ||
2432 | hdr = (struct iscsi_logout *) buf; | |
2433 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2434 | |
2435 | if (tiqn) { | |
2436 | spin_lock(&tiqn->logout_stats.lock); | |
2437 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2438 | tiqn->logout_stats.normal_logouts++; | |
2439 | else | |
2440 | tiqn->logout_stats.abnormal_logouts++; | |
2441 | spin_unlock(&tiqn->logout_stats.lock); | |
2442 | } | |
2443 | ||
2444 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2445 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2446 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2447 | hdr->cid, conn->cid); | |
2448 | ||
2449 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2450 | pr_err("Received logout request on connection that" | |
2451 | " is not in logged in state, ignoring request.\n"); | |
aafc9d15 | 2452 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
2453 | return 0; |
2454 | } | |
2455 | ||
e48354ce NB |
2456 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2457 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2458 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2459 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2460 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2461 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2462 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2463 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2464 | cmd->logout_reason = reason_code; |
2465 | cmd->data_direction = DMA_NONE; | |
2466 | ||
2467 | /* | |
2468 | * We need to sleep in these cases (by returning 1) until the Logout | |
2469 | * Response gets sent in the tx thread. | |
2470 | */ | |
2471 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2472 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2473 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2474 | logout_remove = 1; |
2475 | ||
2476 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2477 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2478 | spin_unlock_bh(&conn->cmd_lock); |
2479 | ||
2480 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2481 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2482 | |
2483 | /* | |
2484 | * Immediate commands are executed, well, immediately. | |
2485 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2486 | */ | |
c6037cc5 | 2487 | if (cmd->immediate_cmd) { |
e48354ce NB |
2488 | int ret = iscsit_execute_cmd(cmd, 0); |
2489 | ||
2490 | if (ret < 0) | |
2491 | return ret; | |
2492 | } else { | |
561bf158 | 2493 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
ba159914 | 2494 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2495 | logout_remove = 0; |
ba159914 NB |
2496 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
2497 | return -1; | |
e48354ce NB |
2498 | } |
2499 | ||
2500 | return logout_remove; | |
2501 | } | |
3e1c81a9 | 2502 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce | 2503 | |
d2faaefb | 2504 | int iscsit_handle_snack( |
e48354ce NB |
2505 | struct iscsi_conn *conn, |
2506 | unsigned char *buf) | |
2507 | { | |
e48354ce NB |
2508 | struct iscsi_snack *hdr; |
2509 | ||
2510 | hdr = (struct iscsi_snack *) buf; | |
2511 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2512 | |
2513 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2514 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2515 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2516 | hdr->begrun, hdr->runlength, conn->cid); | |
2517 | ||
2518 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2519 | pr_err("Initiator sent SNACK request while in" | |
2520 | " ErrorRecoveryLevel=0.\n"); | |
ba159914 NB |
2521 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2522 | buf); | |
e48354ce NB |
2523 | } |
2524 | /* | |
2525 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2526 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2527 | */ | |
2528 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2529 | case 0: | |
2530 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2531 | hdr->itt, |
2532 | be32_to_cpu(hdr->ttt), | |
2533 | be32_to_cpu(hdr->begrun), | |
2534 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2535 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2536 | return iscsit_handle_status_snack(conn, hdr->itt, |
2537 | be32_to_cpu(hdr->ttt), | |
2538 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2539 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2540 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2541 | be32_to_cpu(hdr->begrun), | |
2542 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2543 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2544 | /* FIXME: Support R-Data SNACK */ | |
2545 | pr_err("R-Data SNACK Not Supported.\n"); | |
ba159914 NB |
2546 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2547 | buf); | |
e48354ce NB |
2548 | default: |
2549 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2550 | " error.\n", hdr->flags & 0x0f); | |
ba159914 NB |
2551 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2552 | buf); | |
e48354ce NB |
2553 | } |
2554 | ||
2555 | return 0; | |
2556 | } | |
d2faaefb | 2557 | EXPORT_SYMBOL(iscsit_handle_snack); |
e48354ce NB |
2558 | |
2559 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2560 | { | |
2561 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2562 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2563 | wait_for_completion_interruptible_timeout( | |
2564 | &conn->rx_half_close_comp, | |
2565 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | static int iscsit_handle_immediate_data( | |
2570 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2571 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2572 | u32 length) |
2573 | { | |
2574 | int iov_ret, rx_got = 0, rx_size = 0; | |
2575 | u32 checksum, iov_count = 0, padding = 0; | |
2576 | struct iscsi_conn *conn = cmd->conn; | |
2577 | struct kvec *iov; | |
2578 | ||
2579 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2580 | if (iov_ret < 0) | |
2581 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2582 | ||
2583 | rx_size = length; | |
2584 | iov_count = iov_ret; | |
2585 | iov = &cmd->iov_data[0]; | |
2586 | ||
2587 | padding = ((-length) & 3); | |
2588 | if (padding != 0) { | |
2589 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2590 | iov[iov_count++].iov_len = padding; | |
2591 | rx_size += padding; | |
2592 | } | |
2593 | ||
2594 | if (conn->conn_ops->DataDigest) { | |
2595 | iov[iov_count].iov_base = &checksum; | |
2596 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2597 | rx_size += ISCSI_CRC_LEN; | |
2598 | } | |
2599 | ||
2600 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2601 | ||
2602 | iscsit_unmap_iovec(cmd); | |
2603 | ||
2604 | if (rx_got != rx_size) { | |
2605 | iscsit_rx_thread_wait_for_tcp(conn); | |
2606 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2607 | } | |
2608 | ||
2609 | if (conn->conn_ops->DataDigest) { | |
2610 | u32 data_crc; | |
2611 | ||
69110e3c | 2612 | data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd, |
e48354ce NB |
2613 | cmd->write_data_done, length, padding, |
2614 | cmd->pad_bytes); | |
2615 | ||
2616 | if (checksum != data_crc) { | |
2617 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2618 | " does not match computed 0x%08x\n", checksum, | |
2619 | data_crc); | |
2620 | ||
2621 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2622 | pr_err("Unable to recover from" | |
2623 | " Immediate Data digest failure while" | |
2624 | " in ERL=0.\n"); | |
ba159914 | 2625 | iscsit_reject_cmd(cmd, |
e48354ce | 2626 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2627 | (unsigned char *)hdr); |
e48354ce NB |
2628 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2629 | } else { | |
ba159914 | 2630 | iscsit_reject_cmd(cmd, |
e48354ce | 2631 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2632 | (unsigned char *)hdr); |
e48354ce NB |
2633 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2634 | } | |
2635 | } else { | |
2636 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2637 | " %u bytes of Immediate Data\n", checksum, | |
2638 | length); | |
2639 | } | |
2640 | } | |
2641 | ||
2642 | cmd->write_data_done += length; | |
2643 | ||
ebf1d95c | 2644 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2645 | spin_lock_bh(&cmd->istate_lock); |
2646 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2647 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2648 | spin_unlock_bh(&cmd->istate_lock); | |
2649 | } | |
2650 | ||
2651 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2652 | } | |
2653 | ||
e48354ce NB |
2654 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections |
2655 | with active network interface */ | |
2656 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2657 | { | |
2658 | struct iscsi_cmd *cmd; | |
2659 | struct iscsi_conn *conn_p; | |
d444edc6 | 2660 | bool found = false; |
e48354ce | 2661 | |
618baaf7 BVA |
2662 | lockdep_assert_held(&conn->sess->conn_lock); |
2663 | ||
e48354ce NB |
2664 | /* |
2665 | * Only send a Asynchronous Message on connections whos network | |
2666 | * interface is still functional. | |
2667 | */ | |
2668 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2669 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2670 | iscsit_inc_conn_usage_count(conn_p); | |
d444edc6 | 2671 | found = true; |
e48354ce NB |
2672 | break; |
2673 | } | |
2674 | } | |
2675 | ||
d444edc6 | 2676 | if (!found) |
e48354ce NB |
2677 | return; |
2678 | ||
676687c6 | 2679 | cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING); |
e48354ce NB |
2680 | if (!cmd) { |
2681 | iscsit_dec_conn_usage_count(conn_p); | |
2682 | return; | |
2683 | } | |
2684 | ||
2685 | cmd->logout_cid = conn->cid; | |
2686 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2687 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2688 | ||
2689 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2690 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2691 | spin_unlock_bh(&conn_p->cmd_lock); |
2692 | ||
2693 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2694 | iscsit_dec_conn_usage_count(conn_p); | |
2695 | } | |
2696 | ||
2697 | static int iscsit_send_conn_drop_async_message( | |
2698 | struct iscsi_cmd *cmd, | |
2699 | struct iscsi_conn *conn) | |
2700 | { | |
2701 | struct iscsi_async *hdr; | |
2702 | ||
e48354ce NB |
2703 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; |
2704 | ||
2705 | hdr = (struct iscsi_async *) cmd->pdu; | |
2706 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2707 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2708 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2709 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2710 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2711 | cmd->stat_sn = conn->stat_sn++; | |
2712 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2713 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2714 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce NB |
2715 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; |
2716 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2717 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2718 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2719 | ||
e48354ce NB |
2720 | pr_debug("Sending Connection Dropped Async Message StatSN:" |
2721 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2722 | cmd->logout_cid, conn->cid); | |
2854bb23 VP |
2723 | |
2724 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); | |
e48354ce NB |
2725 | } |
2726 | ||
6f3c0e69 AG |
2727 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2728 | { | |
2729 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2730 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2731 | wait_for_completion_interruptible_timeout( | |
2732 | &conn->tx_half_close_comp, | |
2733 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2734 | } | |
2735 | } | |
2736 | ||
d2faaefb | 2737 | void |
2ec5a8c1 NB |
2738 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
2739 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2740 | bool set_statsn) | |
e48354ce | 2741 | { |
2ec5a8c1 NB |
2742 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2743 | hdr->flags = datain->flags; | |
2744 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2745 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2746 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2747 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2748 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2749 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2750 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2751 | } | |
2752 | } | |
2753 | hton24(hdr->dlength, datain->length); | |
2754 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2755 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2756 | (struct scsi_lun *)&hdr->lun); | |
2757 | else | |
2758 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2759 | ||
2760 | hdr->itt = cmd->init_task_tag; | |
2761 | ||
2762 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2763 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2764 | else | |
2765 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2766 | if (set_statsn) | |
2767 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2768 | else | |
2769 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2770 | ||
2771 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2772 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
2773 | hdr->datasn = cpu_to_be32(datain->data_sn); |
2774 | hdr->offset = cpu_to_be32(datain->offset); | |
2775 | ||
2776 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2777 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2778 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2779 | ntohl(hdr->offset), datain->length, conn->cid); | |
2780 | } | |
d2faaefb | 2781 | EXPORT_SYMBOL(iscsit_build_datain_pdu); |
2ec5a8c1 NB |
2782 | |
2783 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2784 | { | |
2785 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2786 | struct iscsi_datain datain; |
2787 | struct iscsi_datain_req *dr; | |
2854bb23 | 2788 | int eodr = 0, ret; |
2ec5a8c1 | 2789 | bool set_statsn = false; |
e48354ce NB |
2790 | |
2791 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2792 | dr = iscsit_get_datain_values(cmd, &datain); | |
2793 | if (!dr) { | |
2794 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2795 | cmd->init_task_tag); | |
2796 | return -1; | |
2797 | } | |
e48354ce NB |
2798 | /* |
2799 | * Be paranoid and double check the logic for now. | |
2800 | */ | |
ebf1d95c | 2801 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2802 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2803 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2804 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2805 | cmd->se_cmd.data_length); |
e48354ce NB |
2806 | return -1; |
2807 | } | |
2808 | ||
04f3b31b | 2809 | atomic_long_add(datain.length, &conn->sess->tx_data_octets); |
e48354ce NB |
2810 | /* |
2811 | * Special case for successfully execution w/ both DATAIN | |
2812 | * and Sense Data. | |
2813 | */ | |
2814 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2815 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2816 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2817 | else { | |
2818 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2819 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2820 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2821 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2822 | set_statsn = true; |
e48354ce | 2823 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2824 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2825 | set_statsn = true; | |
e48354ce NB |
2826 | } |
2827 | ||
2ec5a8c1 | 2828 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce | 2829 | |
2854bb23 VP |
2830 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, dr, &datain, 0); |
2831 | if (ret < 0) | |
6f3c0e69 | 2832 | return ret; |
6f3c0e69 | 2833 | |
e48354ce | 2834 | if (dr->dr_complete) { |
6f3c0e69 | 2835 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2836 | 2 : 1; |
2837 | iscsit_free_datain_req(cmd, dr); | |
2838 | } | |
2839 | ||
6f3c0e69 | 2840 | return eodr; |
e48354ce NB |
2841 | } |
2842 | ||
2ec5a8c1 NB |
2843 | int |
2844 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2845 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2846 | { |
e48354ce NB |
2847 | struct iscsi_conn *logout_conn = NULL; |
2848 | struct iscsi_conn_recovery *cr = NULL; | |
2849 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2850 | /* |
2851 | * The actual shutting down of Sessions and/or Connections | |
2852 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2853 | * is done in scsi_logout_post_handler(). | |
2854 | */ | |
2855 | switch (cmd->logout_reason) { | |
2856 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2857 | pr_debug("iSCSI session logout successful, setting" | |
2858 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2859 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2860 | break; | |
2861 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2862 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2863 | break; | |
2864 | /* | |
2865 | * For CLOSECONNECTION logout requests carrying | |
2866 | * a matching logout CID -> local CID, the reference | |
2867 | * for the local CID will have been incremented in | |
2868 | * iscsi_logout_closeconnection(). | |
2869 | * | |
2870 | * For CLOSECONNECTION logout requests carrying | |
2871 | * a different CID than the connection it arrived | |
2872 | * on, the connection responding to cmd->logout_cid | |
2873 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2874 | */ | |
2875 | ||
2876 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2877 | " successful.\n", cmd->logout_cid, conn->cid); | |
2878 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2879 | break; | |
2880 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2881 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2882 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2883 | break; | |
2884 | /* | |
2885 | * If the connection is still active from our point of view | |
2886 | * force connection recovery to occur. | |
2887 | */ | |
2888 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2889 | cmd->logout_cid); | |
ee1b1b9c | 2890 | if (logout_conn) { |
e48354ce NB |
2891 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2892 | iscsit_dec_conn_usage_count(logout_conn); | |
2893 | } | |
2894 | ||
2895 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2896 | conn->sess, cmd->logout_cid); | |
2897 | if (!cr) { | |
2898 | pr_err("Unable to locate CID: %hu for" | |
2899 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2900 | cmd->logout_cid); | |
2901 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2902 | break; | |
2903 | } | |
2904 | ||
2905 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2906 | ||
2907 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2908 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2909 | cmd->logout_cid, conn->cid); | |
2910 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2911 | break; | |
2912 | default: | |
2913 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2914 | cmd->logout_reason); | |
2915 | return -1; | |
2916 | } | |
2917 | ||
e48354ce NB |
2918 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2919 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2920 | hdr->response = cmd->logout_response; | |
66c7db68 | 2921 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2922 | cmd->stat_sn = conn->stat_sn++; |
2923 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2924 | ||
2925 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2926 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2927 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 2928 | |
2ec5a8c1 NB |
2929 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2930 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2931 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2932 | cmd->logout_cid, conn->cid); | |
2933 | ||
2934 | return 0; | |
2935 | } | |
2936 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2937 | ||
2938 | static int | |
2939 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2940 | { | |
2854bb23 | 2941 | int rc; |
2ec5a8c1 NB |
2942 | |
2943 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2944 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2945 | if (rc < 0) | |
2946 | return rc; | |
2947 | ||
2854bb23 | 2948 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
e48354ce NB |
2949 | } |
2950 | ||
2ec5a8c1 NB |
2951 | void |
2952 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2953 | struct iscsi_nopin *hdr, bool nopout_response) | |
2954 | { | |
2955 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2956 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2957 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2958 | if (nopout_response) | |
2959 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2960 | hdr->itt = cmd->init_task_tag; | |
2961 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2962 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2963 | conn->stat_sn; | |
2964 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2965 | ||
2966 | if (nopout_response) | |
2967 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2968 | ||
2969 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2970 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
2971 | |
2972 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2973 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
3fc6a642 | 2974 | "Solicited" : "Unsolicited", cmd->init_task_tag, |
2ec5a8c1 NB |
2975 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); |
2976 | } | |
2977 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2978 | ||
e48354ce NB |
2979 | /* |
2980 | * Unsolicited NOPIN, either requesting a response or not. | |
2981 | */ | |
2982 | static int iscsit_send_unsolicited_nopin( | |
2983 | struct iscsi_cmd *cmd, | |
2984 | struct iscsi_conn *conn, | |
2985 | int want_response) | |
2986 | { | |
2ec5a8c1 | 2987 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2854bb23 | 2988 | int ret; |
e48354ce | 2989 | |
2ec5a8c1 | 2990 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce | 2991 | |
e48354ce NB |
2992 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" |
2993 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2994 | ||
2854bb23 VP |
2995 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
2996 | if (ret < 0) | |
6f3c0e69 | 2997 | return ret; |
6f3c0e69 AG |
2998 | |
2999 | spin_lock_bh(&cmd->istate_lock); | |
3000 | cmd->i_state = want_response ? | |
3001 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
3002 | spin_unlock_bh(&cmd->istate_lock); | |
3003 | ||
e48354ce NB |
3004 | return 0; |
3005 | } | |
3006 | ||
2ec5a8c1 NB |
3007 | static int |
3008 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 3009 | { |
2ec5a8c1 | 3010 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 3011 | |
2ec5a8c1 | 3012 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 3013 | |
e48354ce NB |
3014 | /* |
3015 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
3016 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
3017 | */ | |
2854bb23 | 3018 | pr_debug("Echoing back %u bytes of ping data.\n", cmd->buf_ptr_size); |
e48354ce | 3019 | |
2854bb23 VP |
3020 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3021 | cmd->buf_ptr, | |
3022 | cmd->buf_ptr_size); | |
e48354ce NB |
3023 | } |
3024 | ||
6f3c0e69 | 3025 | static int iscsit_send_r2t( |
e48354ce NB |
3026 | struct iscsi_cmd *cmd, |
3027 | struct iscsi_conn *conn) | |
3028 | { | |
e48354ce NB |
3029 | struct iscsi_r2t *r2t; |
3030 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 3031 | int ret; |
e48354ce NB |
3032 | |
3033 | r2t = iscsit_get_r2t_from_list(cmd); | |
3034 | if (!r2t) | |
3035 | return -1; | |
3036 | ||
3037 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3038 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3039 | hdr->opcode = ISCSI_OP_R2T; | |
3040 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3041 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3042 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3043 | hdr->itt = cmd->init_task_tag; |
8567270d VP |
3044 | if (conn->conn_transport->iscsit_get_r2t_ttt) |
3045 | conn->conn_transport->iscsit_get_r2t_ttt(conn, cmd, r2t); | |
3046 | else | |
3047 | r2t->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
e48354ce NB |
3048 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); |
3049 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3050 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3051 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce NB |
3052 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); |
3053 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3054 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3055 | ||
e48354ce NB |
3056 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" |
3057 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3058 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3059 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3060 | r2t->offset, r2t->xfer_len, conn->cid); | |
3061 | ||
e48354ce NB |
3062 | spin_lock_bh(&cmd->r2t_lock); |
3063 | r2t->sent_r2t = 1; | |
3064 | spin_unlock_bh(&cmd->r2t_lock); | |
3065 | ||
2854bb23 | 3066 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
6f3c0e69 | 3067 | if (ret < 0) { |
6f3c0e69 AG |
3068 | return ret; |
3069 | } | |
3070 | ||
3071 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3072 | iscsit_start_dataout_timer(cmd, conn); | |
3073 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3074 | ||
e48354ce NB |
3075 | return 0; |
3076 | } | |
3077 | ||
3078 | /* | |
8b1e1244 AG |
3079 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3080 | * connection recovery. | |
e48354ce NB |
3081 | */ |
3082 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3083 | struct iscsi_conn *conn, |
3e1c81a9 | 3084 | struct iscsi_cmd *cmd, |
8b1e1244 | 3085 | bool recovery) |
e48354ce NB |
3086 | { |
3087 | int first_r2t = 1; | |
3088 | u32 offset = 0, xfer_len = 0; | |
3089 | ||
3090 | spin_lock_bh(&cmd->r2t_lock); | |
3091 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3092 | spin_unlock_bh(&cmd->r2t_lock); | |
3093 | return 0; | |
3094 | } | |
3095 | ||
8b1e1244 AG |
3096 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3097 | !recovery) | |
c6037cc5 | 3098 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3099 | |
3100 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3101 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3102 | offset = cmd->r2t_offset; | |
3103 | ||
8b1e1244 AG |
3104 | if (first_r2t && recovery) { |
3105 | int new_data_end = offset + | |
3106 | conn->sess->sess_ops->MaxBurstLength - | |
3107 | cmd->next_burst_len; | |
3108 | ||
ebf1d95c AG |
3109 | if (new_data_end > cmd->se_cmd.data_length) |
3110 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3111 | else |
3112 | xfer_len = | |
3113 | conn->sess->sess_ops->MaxBurstLength - | |
3114 | cmd->next_burst_len; | |
e48354ce | 3115 | } else { |
8b1e1244 AG |
3116 | int new_data_end = offset + |
3117 | conn->sess->sess_ops->MaxBurstLength; | |
3118 | ||
ebf1d95c AG |
3119 | if (new_data_end > cmd->se_cmd.data_length) |
3120 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3121 | else |
3122 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3123 | } |
3124 | cmd->r2t_offset += xfer_len; | |
3125 | ||
ebf1d95c | 3126 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3127 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3128 | } else { | |
3129 | struct iscsi_seq *seq; | |
3130 | ||
3131 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3132 | if (!seq) { | |
3133 | spin_unlock_bh(&cmd->r2t_lock); | |
3134 | return -1; | |
3135 | } | |
3136 | ||
3137 | offset = seq->offset; | |
3138 | xfer_len = seq->xfer_len; | |
3139 | ||
3140 | if (cmd->seq_send_order == cmd->seq_count) | |
3141 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3142 | } | |
3143 | cmd->outstanding_r2ts++; | |
3144 | first_r2t = 0; | |
3145 | ||
3146 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3147 | spin_unlock_bh(&cmd->r2t_lock); | |
3148 | return -1; | |
3149 | } | |
3150 | ||
3151 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3152 | break; | |
3153 | } | |
3154 | spin_unlock_bh(&cmd->r2t_lock); | |
3155 | ||
3156 | return 0; | |
3157 | } | |
d2faaefb | 3158 | EXPORT_SYMBOL(iscsit_build_r2ts_for_cmd); |
e48354ce | 3159 | |
2ec5a8c1 NB |
3160 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3161 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3162 | { |
2ec5a8c1 | 3163 | if (inc_stat_sn) |
e48354ce NB |
3164 | cmd->stat_sn = conn->stat_sn++; |
3165 | ||
04f3b31b | 3166 | atomic_long_inc(&conn->sess->rsp_pdus); |
e48354ce | 3167 | |
e48354ce NB |
3168 | memset(hdr, 0, ISCSI_HDR_LEN); |
3169 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3170 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3171 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3172 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3173 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3174 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3175 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3176 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3177 | } |
3178 | hdr->response = cmd->iscsi_response; | |
3179 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3180 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3181 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3182 | ||
3183 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3184 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3185 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3186 | |
2ec5a8c1 NB |
3187 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3188 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3189 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3190 | cmd->se_cmd.scsi_status, conn->cid); | |
3191 | } | |
3192 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3193 | ||
3194 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3195 | { | |
3196 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
2ec5a8c1 | 3197 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); |
2854bb23 VP |
3198 | void *data_buf = NULL; |
3199 | u32 padding = 0, data_buf_len = 0; | |
2ec5a8c1 NB |
3200 | |
3201 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3202 | ||
e48354ce NB |
3203 | /* |
3204 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3205 | */ | |
3206 | if (cmd->se_cmd.sense_buffer && | |
3207 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3208 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3209 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3210 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3211 | ||
e48354ce | 3212 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3213 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
2854bb23 VP |
3214 | data_buf = cmd->sense_buffer; |
3215 | data_buf_len = cmd->se_cmd.scsi_sense_length + padding; | |
e48354ce NB |
3216 | |
3217 | if (padding) { | |
9c58b7dd | 3218 | memset(cmd->sense_buffer + |
e48354ce | 3219 | cmd->se_cmd.scsi_sense_length, 0, padding); |
e48354ce NB |
3220 | pr_debug("Adding %u bytes of padding to" |
3221 | " SENSE.\n", padding); | |
3222 | } | |
3223 | ||
e48354ce NB |
3224 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" |
3225 | " Response PDU\n", | |
3226 | cmd->se_cmd.scsi_sense_length); | |
3227 | } | |
3228 | ||
2854bb23 VP |
3229 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, data_buf, |
3230 | data_buf_len); | |
e48354ce NB |
3231 | } |
3232 | ||
3233 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3234 | { | |
3235 | switch (se_tmr->response) { | |
3236 | case TMR_FUNCTION_COMPLETE: | |
3237 | return ISCSI_TMF_RSP_COMPLETE; | |
3238 | case TMR_TASK_DOES_NOT_EXIST: | |
3239 | return ISCSI_TMF_RSP_NO_TASK; | |
3240 | case TMR_LUN_DOES_NOT_EXIST: | |
3241 | return ISCSI_TMF_RSP_NO_LUN; | |
3242 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3243 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
e48354ce NB |
3244 | case TMR_FUNCTION_REJECTED: |
3245 | default: | |
3246 | return ISCSI_TMF_RSP_REJECTED; | |
3247 | } | |
3248 | } | |
3249 | ||
2ec5a8c1 NB |
3250 | void |
3251 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3252 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3253 | { |
3254 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3255 | |
e48354ce | 3256 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3257 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3258 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3259 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3260 | cmd->stat_sn = conn->stat_sn++; |
3261 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3262 | ||
3263 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3264 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3265 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3266 | |
2ec5a8c1 NB |
3267 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3268 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3269 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3270 | } | |
3271 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3272 | ||
3273 | static int | |
3274 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3275 | { | |
3276 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
2ec5a8c1 NB |
3277 | |
3278 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3279 | ||
2854bb23 | 3280 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
e48354ce NB |
3281 | } |
3282 | ||
8b1e1244 AG |
3283 | #define SENDTARGETS_BUF_LIMIT 32768U |
3284 | ||
22c7aaa5 SG |
3285 | static int |
3286 | iscsit_build_sendtargets_response(struct iscsi_cmd *cmd, | |
e4f4e801 SG |
3287 | enum iscsit_transport_type network_transport, |
3288 | int skip_bytes, bool *completed) | |
e48354ce NB |
3289 | { |
3290 | char *payload = NULL; | |
3291 | struct iscsi_conn *conn = cmd->conn; | |
3292 | struct iscsi_portal_group *tpg; | |
3293 | struct iscsi_tiqn *tiqn; | |
3294 | struct iscsi_tpg_np *tpg_np; | |
3295 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
2dd1d53f | 3296 | int target_name_printed; |
8b1e1244 | 3297 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
6665889c | 3298 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; |
a6415cdd | 3299 | bool active; |
e48354ce | 3300 | |
be7dcfb6 | 3301 | buffer_len = min(conn->conn_ops->MaxRecvDataSegmentLength, |
8b1e1244 | 3302 | SENDTARGETS_BUF_LIMIT); |
e48354ce NB |
3303 | |
3304 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
c46e22f1 | 3305 | if (!payload) |
e48354ce | 3306 | return -ENOMEM; |
c46e22f1 | 3307 | |
6665889c | 3308 | /* |
8060b8dd | 3309 | * Locate pointer to iqn./eui. string for ICF_SENDTARGETS_SINGLE |
6665889c NB |
3310 | * explicit case.. |
3311 | */ | |
8060b8dd | 3312 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) { |
6665889c NB |
3313 | text_ptr = strchr(text_in, '='); |
3314 | if (!text_ptr) { | |
3315 | pr_err("Unable to locate '=' string in text_in:" | |
3316 | " %s\n", text_in); | |
4f45d320 | 3317 | kfree(payload); |
6665889c NB |
3318 | return -EINVAL; |
3319 | } | |
3320 | /* | |
3321 | * Skip over '=' character.. | |
3322 | */ | |
3323 | text_ptr += 1; | |
3324 | } | |
e48354ce NB |
3325 | |
3326 | spin_lock(&tiqn_lock); | |
3327 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
8060b8dd | 3328 | if ((cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) && |
6665889c NB |
3329 | strcmp(tiqn->tiqn, text_ptr)) { |
3330 | continue; | |
3331 | } | |
3332 | ||
2dd1d53f | 3333 | target_name_printed = 0; |
e48354ce NB |
3334 | |
3335 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3336 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3337 | ||
2dd1d53f TG |
3338 | /* If demo_mode_discovery=0 and generate_node_acls=0 |
3339 | * (demo mode dislabed) do not return | |
3340 | * TargetName+TargetAddress unless a NodeACL exists. | |
3341 | */ | |
3342 | ||
3343 | if ((tpg->tpg_attrib.generate_node_acls == 0) && | |
3344 | (tpg->tpg_attrib.demo_mode_discovery == 0) && | |
21aaa23b | 3345 | (!target_tpg_has_node_acl(&tpg->tpg_se_tpg, |
2dd1d53f TG |
3346 | cmd->conn->sess->sess_ops->InitiatorName))) { |
3347 | continue; | |
3348 | } | |
3349 | ||
e48354ce | 3350 | spin_lock(&tpg->tpg_state_lock); |
a6415cdd | 3351 | active = (tpg->tpg_state == TPG_STATE_ACTIVE); |
e48354ce NB |
3352 | spin_unlock(&tpg->tpg_state_lock); |
3353 | ||
a6415cdd DD |
3354 | if (!active && tpg->tpg_attrib.tpg_enabled_sendtargets) |
3355 | continue; | |
3356 | ||
e48354ce NB |
3357 | spin_lock(&tpg->tpg_np_lock); |
3358 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3359 | tpg_np_list) { | |
2f9bc894 | 3360 | struct iscsi_np *np = tpg_np->tpg_np; |
13a3cf08 | 3361 | struct sockaddr_storage *sockaddr; |
2f9bc894 | 3362 | |
22c7aaa5 SG |
3363 | if (np->np_network_transport != network_transport) |
3364 | continue; | |
3365 | ||
2dd1d53f TG |
3366 | if (!target_name_printed) { |
3367 | len = sprintf(buf, "TargetName=%s", | |
3368 | tiqn->tiqn); | |
3369 | len += 1; | |
3370 | ||
3371 | if ((len + payload_len) > buffer_len) { | |
3372 | spin_unlock(&tpg->tpg_np_lock); | |
3373 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3374 | end_of_buf = 1; | |
3375 | goto eob; | |
3376 | } | |
e4f4e801 SG |
3377 | |
3378 | if (skip_bytes && len <= skip_bytes) { | |
3379 | skip_bytes -= len; | |
3380 | } else { | |
3381 | memcpy(payload + payload_len, buf, len); | |
3382 | payload_len += len; | |
3383 | target_name_printed = 1; | |
3384 | if (len > skip_bytes) | |
3385 | skip_bytes = 0; | |
3386 | } | |
2dd1d53f TG |
3387 | } |
3388 | ||
7bfca0cf | 3389 | if (inet_addr_is_any((struct sockaddr *)&np->np_sockaddr)) |
69d75574 | 3390 | sockaddr = &conn->local_sockaddr; |
1997e625 | 3391 | else |
69d75574 | 3392 | sockaddr = &np->np_sockaddr; |
1997e625 | 3393 | |
69d75574 AG |
3394 | len = sprintf(buf, "TargetAddress=" |
3395 | "%pISpc,%hu", | |
3396 | sockaddr, | |
3397 | tpg->tpgt); | |
e48354ce NB |
3398 | len += 1; |
3399 | ||
3400 | if ((len + payload_len) > buffer_len) { | |
3401 | spin_unlock(&tpg->tpg_np_lock); | |
3402 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3403 | end_of_buf = 1; | |
3404 | goto eob; | |
3405 | } | |
e4f4e801 SG |
3406 | |
3407 | if (skip_bytes && len <= skip_bytes) { | |
3408 | skip_bytes -= len; | |
3409 | } else { | |
3410 | memcpy(payload + payload_len, buf, len); | |
3411 | payload_len += len; | |
3412 | if (len > skip_bytes) | |
3413 | skip_bytes = 0; | |
3414 | } | |
e48354ce NB |
3415 | } |
3416 | spin_unlock(&tpg->tpg_np_lock); | |
3417 | } | |
3418 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3419 | eob: | |
e4f4e801 SG |
3420 | if (end_of_buf) { |
3421 | *completed = false; | |
e48354ce | 3422 | break; |
e4f4e801 | 3423 | } |
6665889c | 3424 | |
8060b8dd | 3425 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) |
6665889c | 3426 | break; |
e48354ce NB |
3427 | } |
3428 | spin_unlock(&tiqn_lock); | |
3429 | ||
3430 | cmd->buf_ptr = payload; | |
3431 | ||
3432 | return payload_len; | |
3433 | } | |
3434 | ||
889c8a68 NB |
3435 | int |
3436 | iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
22c7aaa5 SG |
3437 | struct iscsi_text_rsp *hdr, |
3438 | enum iscsit_transport_type network_transport) | |
e48354ce | 3439 | { |
889c8a68 | 3440 | int text_length, padding; |
e4f4e801 | 3441 | bool completed = true; |
e48354ce | 3442 | |
e4f4e801 SG |
3443 | text_length = iscsit_build_sendtargets_response(cmd, network_transport, |
3444 | cmd->read_data_done, | |
3445 | &completed); | |
e48354ce NB |
3446 | if (text_length < 0) |
3447 | return text_length; | |
3448 | ||
e4f4e801 | 3449 | if (completed) { |
310d40a9 | 3450 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e4f4e801 | 3451 | } else { |
310d40a9 | 3452 | hdr->flags = ISCSI_FLAG_TEXT_CONTINUE; |
e4f4e801 SG |
3453 | cmd->read_data_done += text_length; |
3454 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
3455 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
3456 | } | |
889c8a68 | 3457 | hdr->opcode = ISCSI_OP_TEXT_RSP; |
e48354ce | 3458 | padding = ((-text_length) & 3); |
e48354ce | 3459 | hton24(hdr->dlength, text_length); |
889c8a68 NB |
3460 | hdr->itt = cmd->init_task_tag; |
3461 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3462 | cmd->stat_sn = conn->stat_sn++; | |
3463 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
e48354ce NB |
3464 | |
3465 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
e4f4e801 SG |
3466 | /* |
3467 | * Reset maxcmdsn_inc in multi-part text payload exchanges to | |
3468 | * correctly increment MaxCmdSN for each response answering a | |
3469 | * non immediate text request with a valid CmdSN. | |
3470 | */ | |
3471 | cmd->maxcmdsn_inc = 0; | |
889c8a68 | 3472 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
109e2381 | 3473 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3474 | |
e4f4e801 SG |
3475 | pr_debug("Built Text Response: ITT: 0x%08x, TTT: 0x%08x, StatSN: 0x%08x," |
3476 | " Length: %u, CID: %hu F: %d C: %d\n", cmd->init_task_tag, | |
3477 | cmd->targ_xfer_tag, cmd->stat_sn, text_length, conn->cid, | |
3478 | !!(hdr->flags & ISCSI_FLAG_CMD_FINAL), | |
3479 | !!(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)); | |
889c8a68 NB |
3480 | |
3481 | return text_length + padding; | |
3482 | } | |
3483 | EXPORT_SYMBOL(iscsit_build_text_rsp); | |
e48354ce | 3484 | |
889c8a68 NB |
3485 | static int iscsit_send_text_rsp( |
3486 | struct iscsi_cmd *cmd, | |
3487 | struct iscsi_conn *conn) | |
3488 | { | |
3489 | struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; | |
2854bb23 | 3490 | int text_length; |
e48354ce | 3491 | |
864e504a VP |
3492 | text_length = iscsit_build_text_rsp(cmd, conn, hdr, |
3493 | conn->conn_transport->transport_type); | |
2854bb23 VP |
3494 | if (text_length < 0) |
3495 | return text_length; | |
e48354ce | 3496 | |
2854bb23 VP |
3497 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3498 | cmd->buf_ptr, | |
3499 | text_length); | |
e48354ce NB |
3500 | } |
3501 | ||
2ec5a8c1 NB |
3502 | void |
3503 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3504 | struct iscsi_reject *hdr) | |
3505 | { | |
3506 | hdr->opcode = ISCSI_OP_REJECT; | |
ba159914 | 3507 | hdr->reason = cmd->reject_reason; |
2ec5a8c1 NB |
3508 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
3509 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3510 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3511 | cmd->stat_sn = conn->stat_sn++; | |
3512 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3513 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3514 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
3515 | |
3516 | } | |
3517 | EXPORT_SYMBOL(iscsit_build_reject); | |
3518 | ||
e48354ce NB |
3519 | static int iscsit_send_reject( |
3520 | struct iscsi_cmd *cmd, | |
3521 | struct iscsi_conn *conn) | |
3522 | { | |
bfbdb31d | 3523 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3524 | |
bfbdb31d | 3525 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce | 3526 | |
e48354ce NB |
3527 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," |
3528 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3529 | ||
2854bb23 VP |
3530 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3531 | cmd->buf_ptr, | |
3532 | ISCSI_HDR_LEN); | |
e48354ce NB |
3533 | } |
3534 | ||
e48354ce NB |
3535 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3536 | { | |
e48354ce NB |
3537 | int ord, cpu; |
3538 | /* | |
88dcd2da NB |
3539 | * bitmap_id is assigned from iscsit_global->ts_bitmap from |
3540 | * within iscsit_start_kthreads() | |
e48354ce | 3541 | * |
88dcd2da NB |
3542 | * Here we use bitmap_id to determine which CPU that this |
3543 | * iSCSI connection's RX/TX threads will be scheduled to | |
e48354ce NB |
3544 | * execute upon. |
3545 | */ | |
88dcd2da | 3546 | ord = conn->bitmap_id % cpumask_weight(cpu_online_mask); |
e48354ce NB |
3547 | for_each_online_cpu(cpu) { |
3548 | if (ord-- == 0) { | |
3549 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3550 | return; | |
3551 | } | |
3552 | } | |
3553 | /* | |
3554 | * This should never be reached.. | |
3555 | */ | |
3556 | dump_stack(); | |
3557 | cpumask_setall(conn->conn_cpumask); | |
3558 | } | |
3559 | ||
d2faaefb | 3560 | int |
2ec5a8c1 | 3561 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) |
e48354ce | 3562 | { |
6f3c0e69 AG |
3563 | int ret; |
3564 | ||
2ec5a8c1 NB |
3565 | switch (state) { |
3566 | case ISTATE_SEND_R2T: | |
3567 | ret = iscsit_send_r2t(cmd, conn); | |
3568 | if (ret < 0) | |
3569 | goto err; | |
3570 | break; | |
3571 | case ISTATE_REMOVE: | |
3572 | spin_lock_bh(&conn->cmd_lock); | |
5159d763 | 3573 | list_del_init(&cmd->i_conn_node); |
2ec5a8c1 | 3574 | spin_unlock_bh(&conn->cmd_lock); |
6f3c0e69 | 3575 | |
aafc9d15 | 3576 | iscsit_free_cmd(cmd, false); |
2ec5a8c1 NB |
3577 | break; |
3578 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3579 | iscsit_mod_nopin_response_timer(conn); | |
3580 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3581 | if (ret < 0) | |
6f3c0e69 | 3582 | goto err; |
2ec5a8c1 NB |
3583 | break; |
3584 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3585 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3586 | if (ret < 0) | |
3587 | goto err; | |
3588 | break; | |
3589 | default: | |
3590 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3591 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3592 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3593 | conn->cid); | |
3594 | goto err; | |
6f3c0e69 AG |
3595 | } |
3596 | ||
3597 | return 0; | |
3598 | ||
3599 | err: | |
3600 | return -1; | |
3601 | } | |
d2faaefb | 3602 | EXPORT_SYMBOL(iscsit_immediate_queue); |
6f3c0e69 | 3603 | |
2ec5a8c1 NB |
3604 | static int |
3605 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3606 | { |
2ec5a8c1 | 3607 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3608 | struct iscsi_queue_req *qr; |
3609 | struct iscsi_cmd *cmd; | |
3610 | u8 state; | |
3611 | int ret; | |
3612 | ||
2ec5a8c1 NB |
3613 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3614 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3615 | cmd = qr->cmd; |
3616 | state = qr->state; | |
3617 | kmem_cache_free(lio_qr_cache, qr); | |
3618 | ||
2ec5a8c1 NB |
3619 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3620 | if (ret < 0) | |
3621 | return ret; | |
3622 | } | |
fd3a9025 | 3623 | |
2ec5a8c1 NB |
3624 | return 0; |
3625 | } | |
6f3c0e69 | 3626 | |
d2faaefb | 3627 | int |
2ec5a8c1 NB |
3628 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) |
3629 | { | |
3630 | int ret; | |
3631 | ||
3632 | check_rsp_state: | |
3633 | switch (state) { | |
3634 | case ISTATE_SEND_DATAIN: | |
3635 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3636 | if (ret < 0) |
3637 | goto err; | |
2ec5a8c1 NB |
3638 | else if (!ret) |
3639 | /* more drs */ | |
3640 | goto check_rsp_state; | |
3641 | else if (ret == 1) { | |
3642 | /* all done */ | |
3643 | spin_lock_bh(&cmd->istate_lock); | |
3644 | cmd->i_state = ISTATE_SENT_STATUS; | |
3645 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3646 | |
2ec5a8c1 NB |
3647 | if (atomic_read(&conn->check_immediate_queue)) |
3648 | return 1; | |
6f3c0e69 | 3649 | |
2ec5a8c1 NB |
3650 | return 0; |
3651 | } else if (ret == 2) { | |
3652 | /* Still must send status, | |
3653 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3654 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3655 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3656 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3657 | state = ISTATE_SEND_STATUS; |
3658 | goto check_rsp_state; | |
3659 | } | |
3660 | ||
3661 | break; | |
3662 | case ISTATE_SEND_STATUS: | |
3663 | case ISTATE_SEND_STATUS_RECOVERY: | |
3664 | ret = iscsit_send_response(cmd, conn); | |
3665 | break; | |
3666 | case ISTATE_SEND_LOGOUTRSP: | |
3667 | ret = iscsit_send_logout(cmd, conn); | |
3668 | break; | |
3669 | case ISTATE_SEND_ASYNCMSG: | |
3670 | ret = iscsit_send_conn_drop_async_message( | |
3671 | cmd, conn); | |
3672 | break; | |
3673 | case ISTATE_SEND_NOPIN: | |
3674 | ret = iscsit_send_nopin(cmd, conn); | |
3675 | break; | |
3676 | case ISTATE_SEND_REJECT: | |
3677 | ret = iscsit_send_reject(cmd, conn); | |
3678 | break; | |
3679 | case ISTATE_SEND_TASKMGTRSP: | |
3680 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3681 | if (ret != 0) | |
6f3c0e69 | 3682 | break; |
2ec5a8c1 NB |
3683 | ret = iscsit_tmr_post_handler(cmd, conn); |
3684 | if (ret != 0) | |
3685 | iscsit_fall_back_to_erl0(conn->sess); | |
3686 | break; | |
3687 | case ISTATE_SEND_TEXTRSP: | |
3688 | ret = iscsit_send_text_rsp(cmd, conn); | |
3689 | break; | |
3690 | default: | |
3691 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3692 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3693 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3694 | state, conn->cid); | |
3695 | goto err; | |
3696 | } | |
3697 | if (ret < 0) | |
3698 | goto err; | |
3699 | ||
2ec5a8c1 NB |
3700 | switch (state) { |
3701 | case ISTATE_SEND_LOGOUTRSP: | |
3702 | if (!iscsit_logout_post_handler(cmd, conn)) | |
88dcd2da | 3703 | return -ECONNRESET; |
2ec5a8c1 NB |
3704 | /* fall through */ |
3705 | case ISTATE_SEND_STATUS: | |
3706 | case ISTATE_SEND_ASYNCMSG: | |
3707 | case ISTATE_SEND_NOPIN: | |
3708 | case ISTATE_SEND_STATUS_RECOVERY: | |
3709 | case ISTATE_SEND_TEXTRSP: | |
3710 | case ISTATE_SEND_TASKMGTRSP: | |
ba159914 | 3711 | case ISTATE_SEND_REJECT: |
2ec5a8c1 NB |
3712 | spin_lock_bh(&cmd->istate_lock); |
3713 | cmd->i_state = ISTATE_SENT_STATUS; | |
3714 | spin_unlock_bh(&cmd->istate_lock); | |
3715 | break; | |
2ec5a8c1 NB |
3716 | default: |
3717 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3718 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3719 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3720 | cmd->i_state, conn->cid); | |
3721 | goto err; | |
6f3c0e69 AG |
3722 | } |
3723 | ||
2ec5a8c1 NB |
3724 | if (atomic_read(&conn->check_immediate_queue)) |
3725 | return 1; | |
3726 | ||
6f3c0e69 AG |
3727 | return 0; |
3728 | ||
3729 | err: | |
3730 | return -1; | |
6f3c0e69 | 3731 | } |
d2faaefb | 3732 | EXPORT_SYMBOL(iscsit_response_queue); |
6f3c0e69 | 3733 | |
2ec5a8c1 NB |
3734 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3735 | { | |
3736 | struct iscsit_transport *t = conn->conn_transport; | |
3737 | struct iscsi_queue_req *qr; | |
3738 | struct iscsi_cmd *cmd; | |
3739 | u8 state; | |
3740 | int ret; | |
3741 | ||
3742 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3743 | cmd = qr->cmd; | |
3744 | state = qr->state; | |
3745 | kmem_cache_free(lio_qr_cache, qr); | |
3746 | ||
3747 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3748 | if (ret == 1 || ret < 0) | |
3749 | return ret; | |
3750 | } | |
3751 | ||
3752 | return 0; | |
3753 | } | |
3754 | ||
6f3c0e69 AG |
3755 | int iscsi_target_tx_thread(void *arg) |
3756 | { | |
e48354ce | 3757 | int ret = 0; |
88dcd2da | 3758 | struct iscsi_conn *conn = arg; |
5e0cf5e6 JY |
3759 | bool conn_freed = false; |
3760 | ||
e48354ce NB |
3761 | /* |
3762 | * Allow ourselves to be interrupted by SIGINT so that a | |
3763 | * connection recovery / failure event can be triggered externally. | |
3764 | */ | |
3765 | allow_signal(SIGINT); | |
3766 | ||
e48354ce NB |
3767 | while (!kthread_should_stop()) { |
3768 | /* | |
3769 | * Ensure that both TX and RX per connection kthreads | |
3770 | * are scheduled to run on the same CPU. | |
3771 | */ | |
3772 | iscsit_thread_check_cpumask(conn, current, 1); | |
3773 | ||
d5627acb | 3774 | wait_event_interruptible(conn->queues_wq, |
88dcd2da | 3775 | !iscsit_conn_all_queues_empty(conn)); |
e48354ce | 3776 | |
88dcd2da | 3777 | if (signal_pending(current)) |
e48354ce NB |
3778 | goto transport_err; |
3779 | ||
fd3a9025 | 3780 | get_immediate: |
2ec5a8c1 | 3781 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3782 | if (ret < 0) |
3783 | goto transport_err; | |
e48354ce | 3784 | |
2ec5a8c1 | 3785 | ret = iscsit_handle_response_queue(conn); |
5e0cf5e6 | 3786 | if (ret == 1) { |
fd3a9025 | 3787 | goto get_immediate; |
5e0cf5e6 JY |
3788 | } else if (ret == -ECONNRESET) { |
3789 | conn_freed = true; | |
88dcd2da | 3790 | goto out; |
5e0cf5e6 | 3791 | } else if (ret < 0) { |
6f3c0e69 | 3792 | goto transport_err; |
5e0cf5e6 | 3793 | } |
e48354ce NB |
3794 | } |
3795 | ||
3796 | transport_err: | |
e5419865 NB |
3797 | /* |
3798 | * Avoid the normal connection failure code-path if this connection | |
3799 | * is still within LOGIN mode, and iscsi_np process context is | |
3800 | * responsible for cleaning up the early connection failure. | |
3801 | */ | |
3802 | if (conn->conn_state != TARG_CONN_STATE_IN_LOGIN) | |
5e0cf5e6 | 3803 | iscsit_take_action_for_connection_exit(conn, &conn_freed); |
e48354ce | 3804 | out: |
5e0cf5e6 JY |
3805 | if (!conn_freed) { |
3806 | while (!kthread_should_stop()) { | |
3807 | msleep(100); | |
3808 | } | |
3809 | } | |
e48354ce NB |
3810 | return 0; |
3811 | } | |
3812 | ||
3e1c81a9 NB |
3813 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
3814 | { | |
3815 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
3816 | struct iscsi_cmd *cmd; | |
3817 | int ret = 0; | |
3818 | ||
3819 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
3820 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 3821 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3822 | if (!cmd) |
ba159914 | 3823 | goto reject; |
3e1c81a9 NB |
3824 | |
3825 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
3826 | break; | |
3827 | case ISCSI_OP_SCSI_DATA_OUT: | |
3828 | ret = iscsit_handle_data_out(conn, buf); | |
3829 | break; | |
3830 | case ISCSI_OP_NOOP_OUT: | |
3831 | cmd = NULL; | |
3832 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
676687c6 | 3833 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3834 | if (!cmd) |
ba159914 | 3835 | goto reject; |
3e1c81a9 NB |
3836 | } |
3837 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
3838 | break; | |
3839 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 3840 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3841 | if (!cmd) |
ba159914 | 3842 | goto reject; |
3e1c81a9 NB |
3843 | |
3844 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
3845 | break; | |
3846 | case ISCSI_OP_TEXT: | |
e4f4e801 SG |
3847 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { |
3848 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); | |
3849 | if (!cmd) | |
3850 | goto reject; | |
3851 | } else { | |
3852 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); | |
3853 | if (!cmd) | |
3854 | goto reject; | |
3855 | } | |
64534aa7 NB |
3856 | |
3857 | ret = iscsit_handle_text_cmd(conn, cmd, buf); | |
3e1c81a9 NB |
3858 | break; |
3859 | case ISCSI_OP_LOGOUT: | |
676687c6 | 3860 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3861 | if (!cmd) |
ba159914 | 3862 | goto reject; |
3e1c81a9 NB |
3863 | |
3864 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
3865 | if (ret > 0) | |
3866 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3867 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3868 | break; | |
3869 | case ISCSI_OP_SNACK: | |
3870 | ret = iscsit_handle_snack(conn, buf); | |
3871 | break; | |
3872 | default: | |
3873 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
3874 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
3875 | pr_err("Cannot recover from unknown" | |
3876 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
3877 | return -1; | |
3878 | } | |
c04a6091 CVB |
3879 | pr_err("Unable to recover from unknown opcode while OFMarker=No," |
3880 | " closing iSCSI connection.\n"); | |
3881 | ret = -1; | |
3e1c81a9 NB |
3882 | break; |
3883 | } | |
3884 | ||
3885 | return ret; | |
ba159914 NB |
3886 | reject: |
3887 | return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
3888 | } |
3889 | ||
ca82c2bd NB |
3890 | static bool iscsi_target_check_conn_state(struct iscsi_conn *conn) |
3891 | { | |
3892 | bool ret; | |
3893 | ||
3894 | spin_lock_bh(&conn->state_lock); | |
3895 | ret = (conn->conn_state != TARG_CONN_STATE_LOGGED_IN); | |
3896 | spin_unlock_bh(&conn->state_lock); | |
3897 | ||
3898 | return ret; | |
3899 | } | |
3900 | ||
e8205cca | 3901 | static void iscsit_get_rx_pdu(struct iscsi_conn *conn) |
e48354ce | 3902 | { |
e8205cca | 3903 | int ret; |
679fcae4 | 3904 | u8 *buffer, opcode; |
e48354ce | 3905 | u32 checksum = 0, digest = 0; |
e48354ce | 3906 | struct kvec iov; |
3e1c81a9 | 3907 | |
679fcae4 LA |
3908 | buffer = kcalloc(ISCSI_HDR_LEN, sizeof(*buffer), GFP_KERNEL); |
3909 | if (!buffer) | |
3910 | return; | |
3911 | ||
e48354ce NB |
3912 | while (!kthread_should_stop()) { |
3913 | /* | |
3914 | * Ensure that both TX and RX per connection kthreads | |
3915 | * are scheduled to run on the same CPU. | |
3916 | */ | |
3917 | iscsit_thread_check_cpumask(conn, current, 0); | |
3918 | ||
e48354ce NB |
3919 | memset(&iov, 0, sizeof(struct kvec)); |
3920 | ||
3921 | iov.iov_base = buffer; | |
3922 | iov.iov_len = ISCSI_HDR_LEN; | |
3923 | ||
3924 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
3925 | if (ret != ISCSI_HDR_LEN) { | |
3926 | iscsit_rx_thread_wait_for_tcp(conn); | |
679fcae4 | 3927 | break; |
e48354ce NB |
3928 | } |
3929 | ||
e48354ce NB |
3930 | if (conn->conn_ops->HeaderDigest) { |
3931 | iov.iov_base = &digest; | |
3932 | iov.iov_len = ISCSI_CRC_LEN; | |
3933 | ||
3934 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
3935 | if (ret != ISCSI_CRC_LEN) { | |
3936 | iscsit_rx_thread_wait_for_tcp(conn); | |
679fcae4 | 3937 | break; |
e48354ce NB |
3938 | } |
3939 | ||
e1dfb21f BVA |
3940 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, buffer, |
3941 | ISCSI_HDR_LEN, 0, NULL, | |
3942 | &checksum); | |
e48354ce NB |
3943 | |
3944 | if (digest != checksum) { | |
3945 | pr_err("HeaderDigest CRC32C failed," | |
3946 | " received 0x%08x, computed 0x%08x\n", | |
3947 | digest, checksum); | |
3948 | /* | |
3949 | * Set the PDU to 0xff so it will intentionally | |
3950 | * hit default in the switch below. | |
3951 | */ | |
3952 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
04f3b31b | 3953 | atomic_long_inc(&conn->sess->conn_digest_errors); |
e48354ce NB |
3954 | } else { |
3955 | pr_debug("Got HeaderDigest CRC32C" | |
3956 | " 0x%08x\n", checksum); | |
3957 | } | |
3958 | } | |
3959 | ||
3960 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
679fcae4 | 3961 | break; |
e48354ce NB |
3962 | |
3963 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
3964 | ||
3965 | if (conn->sess->sess_ops->SessionType && | |
3966 | ((!(opcode & ISCSI_OP_TEXT)) || | |
3967 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
3968 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
3969 | " while in Discovery Session, rejecting.\n", opcode); | |
ba159914 NB |
3970 | iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
3971 | buffer); | |
679fcae4 | 3972 | break; |
e48354ce NB |
3973 | } |
3974 | ||
3e1c81a9 NB |
3975 | ret = iscsi_target_rx_opcode(conn, buffer); |
3976 | if (ret < 0) | |
679fcae4 | 3977 | break; |
e48354ce | 3978 | } |
679fcae4 LA |
3979 | |
3980 | kfree(buffer); | |
e8205cca VP |
3981 | } |
3982 | ||
3983 | int iscsi_target_rx_thread(void *arg) | |
3984 | { | |
3985 | int rc; | |
3986 | struct iscsi_conn *conn = arg; | |
5e0cf5e6 | 3987 | bool conn_freed = false; |
e8205cca VP |
3988 | |
3989 | /* | |
3990 | * Allow ourselves to be interrupted by SIGINT so that a | |
3991 | * connection recovery / failure event can be triggered externally. | |
3992 | */ | |
3993 | allow_signal(SIGINT); | |
3994 | /* | |
3995 | * Wait for iscsi_post_login_handler() to complete before allowing | |
3996 | * incoming iscsi/tcp socket I/O, and/or failing the connection. | |
3997 | */ | |
3998 | rc = wait_for_completion_interruptible(&conn->rx_login_comp); | |
3999 | if (rc < 0 || iscsi_target_check_conn_state(conn)) | |
5e0cf5e6 | 4000 | goto out; |
e8205cca VP |
4001 | |
4002 | if (!conn->conn_transport->iscsit_get_rx_pdu) | |
4003 | return 0; | |
4004 | ||
4005 | conn->conn_transport->iscsit_get_rx_pdu(conn); | |
e48354ce | 4006 | |
e48354ce NB |
4007 | if (!signal_pending(current)) |
4008 | atomic_set(&conn->transport_failed, 1); | |
5e0cf5e6 JY |
4009 | iscsit_take_action_for_connection_exit(conn, &conn_freed); |
4010 | ||
4011 | out: | |
4012 | if (!conn_freed) { | |
4013 | while (!kthread_should_stop()) { | |
4014 | msleep(100); | |
4015 | } | |
4016 | } | |
4017 | ||
e48354ce NB |
4018 | return 0; |
4019 | } | |
4020 | ||
4021 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4022 | { | |
064cdd2d | 4023 | LIST_HEAD(tmp_list); |
e48354ce NB |
4024 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; |
4025 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4026 | /* |
4027 | * We expect this function to only ever be called from either RX or TX | |
4028 | * thread context via iscsit_close_connection() once the other context | |
4029 | * has been reset -> returned sleeping pre-handler state. | |
4030 | */ | |
4031 | spin_lock_bh(&conn->cmd_lock); | |
064cdd2d | 4032 | list_splice_init(&conn->conn_cmd_list, &tmp_list); |
e48354ce | 4033 | |
064cdd2d NB |
4034 | list_for_each_entry(cmd, &tmp_list, i_conn_node) { |
4035 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
4036 | ||
4037 | if (se_cmd->se_tfo != NULL) { | |
32e36bfb | 4038 | spin_lock_irq(&se_cmd->t_state_lock); |
064cdd2d | 4039 | se_cmd->transport_state |= CMD_T_FABRIC_STOP; |
32e36bfb | 4040 | spin_unlock_irq(&se_cmd->t_state_lock); |
064cdd2d NB |
4041 | } |
4042 | } | |
4043 | spin_unlock_bh(&conn->cmd_lock); | |
4044 | ||
4045 | list_for_each_entry_safe(cmd, cmd_tmp, &tmp_list, i_conn_node) { | |
5159d763 | 4046 | list_del_init(&cmd->i_conn_node); |
e48354ce NB |
4047 | |
4048 | iscsit_increment_maxcmdsn(cmd, sess); | |
aafc9d15 | 4049 | iscsit_free_cmd(cmd, true); |
e48354ce | 4050 | |
e48354ce | 4051 | } |
e48354ce NB |
4052 | } |
4053 | ||
4054 | static void iscsit_stop_timers_for_cmds( | |
4055 | struct iscsi_conn *conn) | |
4056 | { | |
4057 | struct iscsi_cmd *cmd; | |
4058 | ||
4059 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4060 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4061 | if (cmd->data_direction == DMA_TO_DEVICE) |
4062 | iscsit_stop_dataout_timer(cmd); | |
4063 | } | |
4064 | spin_unlock_bh(&conn->cmd_lock); | |
4065 | } | |
4066 | ||
4067 | int iscsit_close_connection( | |
4068 | struct iscsi_conn *conn) | |
4069 | { | |
4070 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4071 | struct iscsi_session *sess = conn->sess; | |
4072 | ||
4073 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4074 | " %u\n", conn->cid, sess->sid); | |
4075 | /* | |
b4869ee9 VP |
4076 | * Always up conn_logout_comp for the traditional TCP and HW_OFFLOAD |
4077 | * case just in case the RX Thread in iscsi_target_rx_opcode() is | |
4078 | * sleeping and the logout response never got sent because the | |
4079 | * connection failed. | |
f068fbc8 NB |
4080 | * |
4081 | * However for iser-target, isert_wait4logout() is using conn_logout_comp | |
4082 | * to signal logout response TX interrupt completion. Go ahead and skip | |
4083 | * this for iser since isert_rx_opcode() does not wait on logout failure, | |
4084 | * and to avoid iscsi_conn pointer dereference in iser-target code. | |
e48354ce | 4085 | */ |
bd027d85 | 4086 | if (!conn->conn_transport->rdma_shutdown) |
f068fbc8 | 4087 | complete(&conn->conn_logout_comp); |
e48354ce | 4088 | |
88dcd2da NB |
4089 | if (!strcmp(current->comm, ISCSI_RX_THREAD_NAME)) { |
4090 | if (conn->tx_thread && | |
4091 | cmpxchg(&conn->tx_thread_active, true, false)) { | |
4092 | send_sig(SIGINT, conn->tx_thread, 1); | |
4093 | kthread_stop(conn->tx_thread); | |
4094 | } | |
4095 | } else if (!strcmp(current->comm, ISCSI_TX_THREAD_NAME)) { | |
4096 | if (conn->rx_thread && | |
4097 | cmpxchg(&conn->rx_thread_active, true, false)) { | |
4098 | send_sig(SIGINT, conn->rx_thread, 1); | |
4099 | kthread_stop(conn->rx_thread); | |
4100 | } | |
4101 | } | |
4102 | ||
4103 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
4104 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
4105 | get_order(1)); | |
4106 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
e48354ce NB |
4107 | |
4108 | iscsit_stop_timers_for_cmds(conn); | |
4109 | iscsit_stop_nopin_response_timer(conn); | |
4110 | iscsit_stop_nopin_timer(conn); | |
defd8848 NB |
4111 | |
4112 | if (conn->conn_transport->iscsit_wait_conn) | |
4113 | conn->conn_transport->iscsit_wait_conn(conn); | |
4114 | ||
e48354ce NB |
4115 | /* |
4116 | * During Connection recovery drop unacknowledged out of order | |
4117 | * commands for this connection, and prepare the other commands | |
53c561dc | 4118 | * for reallegiance. |
e48354ce NB |
4119 | * |
4120 | * During normal operation clear the out of order commands (but | |
4121 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4122 | * struct iscsi_cmds. | |
4123 | */ | |
4124 | if (atomic_read(&conn->connection_recovery)) { | |
4125 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
53c561dc | 4126 | iscsit_prepare_cmds_for_reallegiance(conn); |
e48354ce NB |
4127 | } else { |
4128 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4129 | iscsit_release_commands_from_conn(conn); | |
4130 | } | |
bbc05048 | 4131 | iscsit_free_queue_reqs_for_conn(conn); |
e48354ce NB |
4132 | |
4133 | /* | |
4134 | * Handle decrementing session or connection usage count if | |
4135 | * a logout response was not able to be sent because the | |
4136 | * connection failed. Fall back to Session Recovery here. | |
4137 | */ | |
4138 | if (atomic_read(&conn->conn_logout_remove)) { | |
4139 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4140 | iscsit_dec_conn_usage_count(conn); | |
4141 | iscsit_dec_session_usage_count(sess); | |
4142 | } | |
4143 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4144 | iscsit_dec_conn_usage_count(conn); | |
4145 | ||
4146 | atomic_set(&conn->conn_logout_remove, 0); | |
4147 | atomic_set(&sess->session_reinstatement, 0); | |
4148 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4149 | } | |
4150 | ||
4151 | spin_lock_bh(&sess->conn_lock); | |
4152 | list_del(&conn->conn_list); | |
4153 | ||
4154 | /* | |
4155 | * Attempt to let the Initiator know this connection failed by | |
4156 | * sending an Connection Dropped Async Message on another | |
4157 | * active connection. | |
4158 | */ | |
4159 | if (atomic_read(&conn->connection_recovery)) | |
4160 | iscsit_build_conn_drop_async_message(conn); | |
4161 | ||
4162 | spin_unlock_bh(&sess->conn_lock); | |
4163 | ||
4164 | /* | |
4165 | * If connection reinstatement is being performed on this connection, | |
4166 | * up the connection reinstatement semaphore that is being blocked on | |
4167 | * in iscsit_cause_connection_reinstatement(). | |
4168 | */ | |
4169 | spin_lock_bh(&conn->state_lock); | |
4170 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4171 | spin_unlock_bh(&conn->state_lock); | |
4172 | complete(&conn->conn_wait_comp); | |
4173 | wait_for_completion(&conn->conn_post_wait_comp); | |
4174 | spin_lock_bh(&conn->state_lock); | |
4175 | } | |
4176 | ||
4177 | /* | |
4178 | * If connection reinstatement is being performed on this connection | |
4179 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4180 | * connection wait rcfr semaphore that is being blocked on | |
4181 | * an iscsit_connection_reinstatement_rcfr(). | |
4182 | */ | |
4183 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4184 | spin_unlock_bh(&conn->state_lock); | |
4185 | complete(&conn->conn_wait_rcfr_comp); | |
4186 | wait_for_completion(&conn->conn_post_wait_comp); | |
4187 | spin_lock_bh(&conn->state_lock); | |
4188 | } | |
4189 | atomic_set(&conn->connection_reinstatement, 1); | |
4190 | spin_unlock_bh(&conn->state_lock); | |
4191 | ||
4192 | /* | |
4193 | * If any other processes are accessing this connection pointer we | |
4194 | * must wait until they have completed. | |
4195 | */ | |
4196 | iscsit_check_conn_usage_count(conn); | |
4197 | ||
69110e3c HX |
4198 | ahash_request_free(conn->conn_tx_hash); |
4199 | if (conn->conn_rx_hash) { | |
4200 | struct crypto_ahash *tfm; | |
4201 | ||
4202 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
4203 | ahash_request_free(conn->conn_rx_hash); | |
4204 | crypto_free_ahash(tfm); | |
4205 | } | |
e48354ce | 4206 | |
bf6932f4 | 4207 | if (conn->sock) |
e48354ce | 4208 | sock_release(conn->sock); |
baa4d64b NB |
4209 | |
4210 | if (conn->conn_transport->iscsit_free_conn) | |
4211 | conn->conn_transport->iscsit_free_conn(conn); | |
4212 | ||
e48354ce NB |
4213 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
4214 | conn->conn_state = TARG_CONN_STATE_FREE; | |
05a86e78 | 4215 | iscsit_free_conn(conn); |
e48354ce NB |
4216 | |
4217 | spin_lock_bh(&sess->conn_lock); | |
4218 | atomic_dec(&sess->nconn); | |
4219 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4220 | " %s\n", atomic_read(&sess->nconn), | |
4221 | sess->sess_ops->InitiatorName); | |
4222 | /* | |
4223 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4224 | * Session that they all fail. | |
4225 | */ | |
4226 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4227 | !atomic_read(&sess->session_logout)) | |
4228 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4229 | ||
4230 | /* | |
4231 | * If this was not the last connection in the session, and we are | |
4232 | * performing session reinstatement or falling back to ERL=0, call | |
4233 | * iscsit_stop_session() without sleeping to shutdown the other | |
4234 | * active connections. | |
4235 | */ | |
4236 | if (atomic_read(&sess->nconn)) { | |
4237 | if (!atomic_read(&sess->session_reinstatement) && | |
4238 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4239 | spin_unlock_bh(&sess->conn_lock); | |
4240 | return 0; | |
4241 | } | |
4242 | if (!atomic_read(&sess->session_stop_active)) { | |
4243 | atomic_set(&sess->session_stop_active, 1); | |
4244 | spin_unlock_bh(&sess->conn_lock); | |
4245 | iscsit_stop_session(sess, 0, 0); | |
4246 | return 0; | |
4247 | } | |
4248 | spin_unlock_bh(&sess->conn_lock); | |
4249 | return 0; | |
4250 | } | |
4251 | ||
4252 | /* | |
4253 | * If this was the last connection in the session and one of the | |
4254 | * following is occurring: | |
4255 | * | |
4256 | * Session Reinstatement is not being performed, and are falling back | |
4257 | * to ERL=0 call iscsit_close_session(). | |
4258 | * | |
4259 | * Session Logout was requested. iscsit_close_session() will be called | |
4260 | * elsewhere. | |
4261 | * | |
4262 | * Session Continuation is not being performed, start the Time2Retain | |
4263 | * handler and check if sleep_on_sess_wait_sem is active. | |
4264 | */ | |
4265 | if (!atomic_read(&sess->session_reinstatement) && | |
4266 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4267 | spin_unlock_bh(&sess->conn_lock); | |
44f33d0f | 4268 | iscsit_close_session(sess); |
e48354ce NB |
4269 | |
4270 | return 0; | |
4271 | } else if (atomic_read(&sess->session_logout)) { | |
4272 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4273 | sess->session_state = TARG_SESS_STATE_FREE; | |
4274 | spin_unlock_bh(&sess->conn_lock); | |
4275 | ||
4276 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4277 | complete(&sess->session_wait_comp); | |
4278 | ||
4279 | return 0; | |
4280 | } else { | |
4281 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4282 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4283 | ||
4284 | if (!atomic_read(&sess->session_continuation)) { | |
4285 | spin_unlock_bh(&sess->conn_lock); | |
4286 | iscsit_start_time2retain_handler(sess); | |
4287 | } else | |
4288 | spin_unlock_bh(&sess->conn_lock); | |
4289 | ||
4290 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4291 | complete(&sess->session_wait_comp); | |
4292 | ||
4293 | return 0; | |
4294 | } | |
e48354ce NB |
4295 | } |
4296 | ||
44f33d0f CH |
4297 | /* |
4298 | * If the iSCSI Session for the iSCSI Initiator Node exists, | |
4299 | * forcefully shutdown the iSCSI NEXUS. | |
4300 | */ | |
e48354ce NB |
4301 | int iscsit_close_session(struct iscsi_session *sess) |
4302 | { | |
60bfcf8e | 4303 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
4304 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
4305 | ||
4306 | if (atomic_read(&sess->nconn)) { | |
4307 | pr_err("%d connection(s) still exist for iSCSI session" | |
4308 | " to %s\n", atomic_read(&sess->nconn), | |
4309 | sess->sess_ops->InitiatorName); | |
4310 | BUG(); | |
4311 | } | |
4312 | ||
4313 | spin_lock_bh(&se_tpg->session_lock); | |
4314 | atomic_set(&sess->session_logout, 1); | |
4315 | atomic_set(&sess->session_reinstatement, 1); | |
4316 | iscsit_stop_time2retain_timer(sess); | |
4317 | spin_unlock_bh(&se_tpg->session_lock); | |
4318 | ||
4319 | /* | |
4320 | * transport_deregister_session_configfs() will clear the | |
4321 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4322 | * can be setting it again with __transport_register_session() in | |
4323 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4324 | * completes in iscsi_np context. | |
4325 | */ | |
4326 | transport_deregister_session_configfs(sess->se_sess); | |
4327 | ||
4328 | /* | |
4329 | * If any other processes are accessing this session pointer we must | |
4330 | * wait until they have completed. If we are in an interrupt (the | |
4331 | * time2retain handler) and contain and active session usage count we | |
4332 | * restart the timer and exit. | |
4333 | */ | |
4334 | if (!in_interrupt()) { | |
4335 | if (iscsit_check_session_usage_count(sess) == 1) | |
4336 | iscsit_stop_session(sess, 1, 1); | |
4337 | } else { | |
4338 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4339 | atomic_set(&sess->session_logout, 0); | |
4340 | iscsit_start_time2retain_handler(sess); | |
4341 | return 0; | |
4342 | } | |
4343 | } | |
4344 | ||
4345 | transport_deregister_session(sess->se_sess); | |
4346 | ||
4347 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
902ff860 | 4348 | iscsit_free_connection_recovery_entries(sess); |
e48354ce NB |
4349 | |
4350 | iscsit_free_all_ooo_cmdsns(sess); | |
4351 | ||
4352 | spin_lock_bh(&se_tpg->session_lock); | |
4353 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4354 | sess->session_state = TARG_SESS_STATE_FREE; | |
4355 | pr_debug("Released iSCSI session from node: %s\n", | |
4356 | sess->sess_ops->InitiatorName); | |
4357 | tpg->nsessions--; | |
4358 | if (tpg->tpg_tiqn) | |
4359 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4360 | ||
4361 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4362 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4363 | ||
31ff0cee | 4364 | ida_free(&sess_ida, sess->session_index); |
e48354ce NB |
4365 | kfree(sess->sess_ops); |
4366 | sess->sess_ops = NULL; | |
4367 | spin_unlock_bh(&se_tpg->session_lock); | |
4368 | ||
4369 | kfree(sess); | |
4370 | return 0; | |
4371 | } | |
4372 | ||
4373 | static void iscsit_logout_post_handler_closesession( | |
4374 | struct iscsi_conn *conn) | |
4375 | { | |
4376 | struct iscsi_session *sess = conn->sess; | |
007d038b NB |
4377 | int sleep = 1; |
4378 | /* | |
4379 | * Traditional iscsi/tcp will invoke this logic from TX thread | |
4380 | * context during session logout, so clear tx_thread_active and | |
4381 | * sleep if iscsit_close_connection() has not already occured. | |
4382 | * | |
4383 | * Since iser-target invokes this logic from it's own workqueue, | |
4384 | * always sleep waiting for RX/TX thread shutdown to complete | |
4385 | * within iscsit_close_connection(). | |
4386 | */ | |
105fa2f4 | 4387 | if (!conn->conn_transport->rdma_shutdown) { |
007d038b | 4388 | sleep = cmpxchg(&conn->tx_thread_active, true, false); |
105fa2f4 NB |
4389 | if (!sleep) |
4390 | return; | |
4391 | } | |
e48354ce NB |
4392 | |
4393 | atomic_set(&conn->conn_logout_remove, 0); | |
4394 | complete(&conn->conn_logout_comp); | |
4395 | ||
4396 | iscsit_dec_conn_usage_count(conn); | |
88dcd2da | 4397 | iscsit_stop_session(sess, sleep, sleep); |
e48354ce | 4398 | iscsit_dec_session_usage_count(sess); |
44f33d0f | 4399 | iscsit_close_session(sess); |
e48354ce NB |
4400 | } |
4401 | ||
4402 | static void iscsit_logout_post_handler_samecid( | |
4403 | struct iscsi_conn *conn) | |
4404 | { | |
007d038b NB |
4405 | int sleep = 1; |
4406 | ||
105fa2f4 | 4407 | if (!conn->conn_transport->rdma_shutdown) { |
007d038b | 4408 | sleep = cmpxchg(&conn->tx_thread_active, true, false); |
105fa2f4 NB |
4409 | if (!sleep) |
4410 | return; | |
4411 | } | |
e48354ce NB |
4412 | |
4413 | atomic_set(&conn->conn_logout_remove, 0); | |
4414 | complete(&conn->conn_logout_comp); | |
4415 | ||
88dcd2da | 4416 | iscsit_cause_connection_reinstatement(conn, sleep); |
e48354ce NB |
4417 | iscsit_dec_conn_usage_count(conn); |
4418 | } | |
4419 | ||
4420 | static void iscsit_logout_post_handler_diffcid( | |
4421 | struct iscsi_conn *conn, | |
4422 | u16 cid) | |
4423 | { | |
4424 | struct iscsi_conn *l_conn; | |
4425 | struct iscsi_session *sess = conn->sess; | |
b53b0d99 | 4426 | bool conn_found = false; |
e48354ce NB |
4427 | |
4428 | if (!sess) | |
4429 | return; | |
4430 | ||
4431 | spin_lock_bh(&sess->conn_lock); | |
4432 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4433 | if (l_conn->cid == cid) { | |
4434 | iscsit_inc_conn_usage_count(l_conn); | |
b53b0d99 | 4435 | conn_found = true; |
e48354ce NB |
4436 | break; |
4437 | } | |
4438 | } | |
4439 | spin_unlock_bh(&sess->conn_lock); | |
4440 | ||
b53b0d99 | 4441 | if (!conn_found) |
e48354ce NB |
4442 | return; |
4443 | ||
4444 | if (l_conn->sock) | |
4445 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4446 | ||
4447 | spin_lock_bh(&l_conn->state_lock); | |
4448 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4449 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4450 | spin_unlock_bh(&l_conn->state_lock); | |
4451 | ||
4452 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4453 | iscsit_dec_conn_usage_count(l_conn); | |
4454 | } | |
4455 | ||
4456 | /* | |
4457 | * Return of 0 causes the TX thread to restart. | |
4458 | */ | |
2ec5a8c1 | 4459 | int iscsit_logout_post_handler( |
e48354ce NB |
4460 | struct iscsi_cmd *cmd, |
4461 | struct iscsi_conn *conn) | |
4462 | { | |
4463 | int ret = 0; | |
4464 | ||
4465 | switch (cmd->logout_reason) { | |
4466 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4467 | switch (cmd->logout_response) { | |
4468 | case ISCSI_LOGOUT_SUCCESS: | |
4469 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4470 | default: | |
4471 | iscsit_logout_post_handler_closesession(conn); | |
4472 | break; | |
4473 | } | |
4474 | ret = 0; | |
4475 | break; | |
4476 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4477 | if (conn->cid == cmd->logout_cid) { | |
4478 | switch (cmd->logout_response) { | |
4479 | case ISCSI_LOGOUT_SUCCESS: | |
4480 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4481 | default: | |
4482 | iscsit_logout_post_handler_samecid(conn); | |
4483 | break; | |
4484 | } | |
4485 | ret = 0; | |
4486 | } else { | |
4487 | switch (cmd->logout_response) { | |
4488 | case ISCSI_LOGOUT_SUCCESS: | |
4489 | iscsit_logout_post_handler_diffcid(conn, | |
4490 | cmd->logout_cid); | |
4491 | break; | |
4492 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4493 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4494 | default: | |
4495 | break; | |
4496 | } | |
4497 | ret = 1; | |
4498 | } | |
4499 | break; | |
4500 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4501 | switch (cmd->logout_response) { | |
4502 | case ISCSI_LOGOUT_SUCCESS: | |
4503 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4504 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4505 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4506 | default: | |
4507 | break; | |
4508 | } | |
4509 | ret = 1; | |
4510 | break; | |
4511 | default: | |
4512 | break; | |
4513 | ||
4514 | } | |
4515 | return ret; | |
4516 | } | |
2ec5a8c1 | 4517 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4518 | |
4519 | void iscsit_fail_session(struct iscsi_session *sess) | |
4520 | { | |
4521 | struct iscsi_conn *conn; | |
4522 | ||
4523 | spin_lock_bh(&sess->conn_lock); | |
4524 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4525 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4526 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4527 | } | |
4528 | spin_unlock_bh(&sess->conn_lock); | |
4529 | ||
4530 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4531 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4532 | } | |
4533 | ||
4534 | int iscsit_free_session(struct iscsi_session *sess) | |
4535 | { | |
4536 | u16 conn_count = atomic_read(&sess->nconn); | |
4537 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4538 | int is_last; | |
4539 | ||
4540 | spin_lock_bh(&sess->conn_lock); | |
4541 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4542 | ||
4543 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4544 | conn_list) { | |
4545 | if (conn_count == 0) | |
4546 | break; | |
4547 | ||
4548 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4549 | is_last = 1; | |
4550 | } else { | |
4551 | iscsit_inc_conn_usage_count(conn_tmp); | |
4552 | is_last = 0; | |
4553 | } | |
4554 | iscsit_inc_conn_usage_count(conn); | |
4555 | ||
4556 | spin_unlock_bh(&sess->conn_lock); | |
4557 | iscsit_cause_connection_reinstatement(conn, 1); | |
4558 | spin_lock_bh(&sess->conn_lock); | |
4559 | ||
4560 | iscsit_dec_conn_usage_count(conn); | |
4561 | if (is_last == 0) | |
4562 | iscsit_dec_conn_usage_count(conn_tmp); | |
4563 | ||
4564 | conn_count--; | |
4565 | } | |
4566 | ||
4567 | if (atomic_read(&sess->nconn)) { | |
4568 | spin_unlock_bh(&sess->conn_lock); | |
4569 | wait_for_completion(&sess->session_wait_comp); | |
4570 | } else | |
4571 | spin_unlock_bh(&sess->conn_lock); | |
4572 | ||
44f33d0f | 4573 | iscsit_close_session(sess); |
e48354ce NB |
4574 | return 0; |
4575 | } | |
4576 | ||
4577 | void iscsit_stop_session( | |
4578 | struct iscsi_session *sess, | |
4579 | int session_sleep, | |
4580 | int connection_sleep) | |
4581 | { | |
4582 | u16 conn_count = atomic_read(&sess->nconn); | |
4583 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4584 | int is_last; | |
4585 | ||
4586 | spin_lock_bh(&sess->conn_lock); | |
4587 | if (session_sleep) | |
4588 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4589 | ||
4590 | if (connection_sleep) { | |
4591 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4592 | conn_list) { | |
4593 | if (conn_count == 0) | |
4594 | break; | |
4595 | ||
4596 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4597 | is_last = 1; | |
4598 | } else { | |
4599 | iscsit_inc_conn_usage_count(conn_tmp); | |
4600 | is_last = 0; | |
4601 | } | |
4602 | iscsit_inc_conn_usage_count(conn); | |
4603 | ||
4604 | spin_unlock_bh(&sess->conn_lock); | |
4605 | iscsit_cause_connection_reinstatement(conn, 1); | |
4606 | spin_lock_bh(&sess->conn_lock); | |
4607 | ||
4608 | iscsit_dec_conn_usage_count(conn); | |
4609 | if (is_last == 0) | |
4610 | iscsit_dec_conn_usage_count(conn_tmp); | |
4611 | conn_count--; | |
4612 | } | |
4613 | } else { | |
4614 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4615 | iscsit_cause_connection_reinstatement(conn, 0); | |
4616 | } | |
4617 | ||
4618 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4619 | spin_unlock_bh(&sess->conn_lock); | |
4620 | wait_for_completion(&sess->session_wait_comp); | |
4621 | } else | |
4622 | spin_unlock_bh(&sess->conn_lock); | |
4623 | } | |
4624 | ||
4625 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4626 | { | |
4627 | struct iscsi_session *sess; | |
4628 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4629 | struct se_session *se_sess, *se_sess_tmp; | |
417c20a9 | 4630 | LIST_HEAD(free_list); |
e48354ce NB |
4631 | int session_count = 0; |
4632 | ||
4633 | spin_lock_bh(&se_tpg->session_lock); | |
4634 | if (tpg->nsessions && !force) { | |
4635 | spin_unlock_bh(&se_tpg->session_lock); | |
4636 | return -1; | |
4637 | } | |
4638 | ||
4639 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4640 | sess_list) { | |
4641 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4642 | ||
4643 | spin_lock(&sess->conn_lock); | |
4644 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4645 | atomic_read(&sess->session_logout) || | |
4646 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4647 | spin_unlock(&sess->conn_lock); | |
4648 | continue; | |
4649 | } | |
4650 | atomic_set(&sess->session_reinstatement, 1); | |
197b806a | 4651 | atomic_set(&sess->session_fall_back_to_erl0, 1); |
e48354ce | 4652 | spin_unlock(&sess->conn_lock); |
e48354ce | 4653 | |
417c20a9 NB |
4654 | list_move_tail(&se_sess->sess_list, &free_list); |
4655 | } | |
4656 | spin_unlock_bh(&se_tpg->session_lock); | |
e48354ce | 4657 | |
417c20a9 NB |
4658 | list_for_each_entry_safe(se_sess, se_sess_tmp, &free_list, sess_list) { |
4659 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4660 | ||
4661 | iscsit_free_session(sess); | |
e48354ce NB |
4662 | session_count++; |
4663 | } | |
e48354ce NB |
4664 | |
4665 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4666 | " Group: %hu\n", session_count, tpg->tpgt); | |
4667 | return 0; | |
4668 | } | |
4669 | ||
4670 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4671 | MODULE_VERSION("4.1.x"); | |
4672 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4673 | MODULE_LICENSE("GPL"); | |
4674 | ||
4675 | module_init(iscsi_target_init_module); | |
4676 | module_exit(iscsi_target_cleanup_module); |