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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> |
e48354ce | 26 | #include <asm/unaligned.h> |
ba929992 | 27 | #include <scsi/scsi_proto.h> |
e48354ce | 28 | #include <scsi/iscsi_proto.h> |
d28b1169 | 29 | #include <scsi/scsi_tcq.h> |
e48354ce | 30 | #include <target/target_core_base.h> |
c4795fb2 | 31 | #include <target/target_core_fabric.h> |
e48354ce | 32 | |
67f091f2 | 33 | #include <target/iscsi/iscsi_target_core.h> |
e48354ce NB |
34 | #include "iscsi_target_parameters.h" |
35 | #include "iscsi_target_seq_pdu_list.h" | |
e48354ce NB |
36 | #include "iscsi_target_datain_values.h" |
37 | #include "iscsi_target_erl0.h" | |
38 | #include "iscsi_target_erl1.h" | |
39 | #include "iscsi_target_erl2.h" | |
40 | #include "iscsi_target_login.h" | |
41 | #include "iscsi_target_tmr.h" | |
42 | #include "iscsi_target_tpg.h" | |
43 | #include "iscsi_target_util.h" | |
44 | #include "iscsi_target.h" | |
45 | #include "iscsi_target_device.h" | |
67f091f2 | 46 | #include <target/iscsi/iscsi_target_stat.h> |
e48354ce | 47 | |
baa4d64b NB |
48 | #include <target/iscsi/iscsi_transport.h> |
49 | ||
e48354ce NB |
50 | static LIST_HEAD(g_tiqn_list); |
51 | static LIST_HEAD(g_np_list); | |
52 | static DEFINE_SPINLOCK(tiqn_lock); | |
ee291e63 | 53 | static DEFINE_MUTEX(np_lock); |
e48354ce NB |
54 | |
55 | static struct idr tiqn_idr; | |
56 | struct idr sess_idr; | |
57 | struct mutex auth_id_lock; | |
58 | spinlock_t sess_idr_lock; | |
59 | ||
60 | struct iscsit_global *iscsit_global; | |
61 | ||
e48354ce NB |
62 | struct kmem_cache *lio_qr_cache; |
63 | struct kmem_cache *lio_dr_cache; | |
64 | struct kmem_cache *lio_ooo_cache; | |
65 | struct kmem_cache *lio_r2t_cache; | |
66 | ||
67 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
2ec5a8c1 | 68 | struct iscsi_scsi_req *, u32); |
e48354ce NB |
69 | |
70 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
71 | { | |
72 | struct iscsi_tiqn *tiqn = NULL; | |
73 | ||
74 | spin_lock(&tiqn_lock); | |
75 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
76 | if (!strcmp(tiqn->tiqn, buf)) { | |
77 | ||
78 | spin_lock(&tiqn->tiqn_state_lock); | |
79 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
80 | tiqn->tiqn_access_count++; | |
81 | spin_unlock(&tiqn->tiqn_state_lock); | |
82 | spin_unlock(&tiqn_lock); | |
83 | return tiqn; | |
84 | } | |
85 | spin_unlock(&tiqn->tiqn_state_lock); | |
86 | } | |
87 | } | |
88 | spin_unlock(&tiqn_lock); | |
89 | ||
90 | return NULL; | |
91 | } | |
92 | ||
93 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
94 | { | |
95 | spin_lock(&tiqn->tiqn_state_lock); | |
96 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
97 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
98 | spin_unlock(&tiqn->tiqn_state_lock); | |
99 | return 0; | |
100 | } | |
101 | spin_unlock(&tiqn->tiqn_state_lock); | |
102 | ||
103 | return -1; | |
104 | } | |
105 | ||
106 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
107 | { | |
108 | spin_lock(&tiqn->tiqn_state_lock); | |
109 | tiqn->tiqn_access_count--; | |
110 | spin_unlock(&tiqn->tiqn_state_lock); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Note that IQN formatting is expected to be done in userspace, and | |
115 | * no explict IQN format checks are done here. | |
116 | */ | |
117 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
118 | { | |
119 | struct iscsi_tiqn *tiqn = NULL; | |
120 | int ret; | |
121 | ||
8f50c7f5 | 122 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
123 | pr_err("Target IQN exceeds %d bytes\n", |
124 | ISCSI_IQN_LEN); | |
125 | return ERR_PTR(-EINVAL); | |
126 | } | |
127 | ||
128 | tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); | |
129 | if (!tiqn) { | |
130 | pr_err("Unable to allocate struct iscsi_tiqn\n"); | |
131 | return ERR_PTR(-ENOMEM); | |
132 | } | |
133 | ||
134 | sprintf(tiqn->tiqn, "%s", buf); | |
135 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
136 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
137 | spin_lock_init(&tiqn->tiqn_state_lock); | |
138 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
139 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
140 | spin_lock_init(&tiqn->login_stats.lock); | |
141 | spin_lock_init(&tiqn->logout_stats.lock); | |
142 | ||
e48354ce NB |
143 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; |
144 | ||
c9365bd0 | 145 | idr_preload(GFP_KERNEL); |
e48354ce | 146 | spin_lock(&tiqn_lock); |
c9365bd0 TH |
147 | |
148 | ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); | |
e48354ce | 149 | if (ret < 0) { |
c9365bd0 | 150 | pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); |
e48354ce | 151 | spin_unlock(&tiqn_lock); |
c9365bd0 | 152 | idr_preload_end(); |
e48354ce NB |
153 | kfree(tiqn); |
154 | return ERR_PTR(ret); | |
155 | } | |
c9365bd0 | 156 | tiqn->tiqn_index = ret; |
e48354ce | 157 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); |
c9365bd0 | 158 | |
e48354ce | 159 | spin_unlock(&tiqn_lock); |
c9365bd0 | 160 | idr_preload_end(); |
e48354ce NB |
161 | |
162 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
163 | ||
164 | return tiqn; | |
165 | ||
166 | } | |
167 | ||
168 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
169 | { | |
170 | /* | |
171 | * Wait for accesses to said struct iscsi_tiqn to end. | |
172 | */ | |
173 | spin_lock(&tiqn->tiqn_state_lock); | |
174 | while (tiqn->tiqn_access_count != 0) { | |
175 | spin_unlock(&tiqn->tiqn_state_lock); | |
176 | msleep(10); | |
177 | spin_lock(&tiqn->tiqn_state_lock); | |
178 | } | |
179 | spin_unlock(&tiqn->tiqn_state_lock); | |
180 | } | |
181 | ||
182 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
183 | { | |
184 | /* | |
185 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
186 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
187 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
188 | * fabric and control code paths. | |
189 | */ | |
190 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
191 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
192 | return; | |
193 | } | |
194 | ||
195 | iscsit_wait_for_tiqn(tiqn); | |
196 | ||
197 | spin_lock(&tiqn_lock); | |
198 | list_del(&tiqn->tiqn_list); | |
199 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
200 | spin_unlock(&tiqn_lock); | |
201 | ||
202 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
203 | tiqn->tiqn); | |
204 | kfree(tiqn); | |
205 | } | |
206 | ||
207 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
208 | { | |
209 | int ret; | |
210 | /* | |
211 | * Determine if the network portal is accepting storage traffic. | |
212 | */ | |
213 | spin_lock_bh(&np->np_thread_lock); | |
214 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
215 | spin_unlock_bh(&np->np_thread_lock); | |
216 | return -1; | |
217 | } | |
e48354ce NB |
218 | spin_unlock_bh(&np->np_thread_lock); |
219 | /* | |
220 | * Determine if the portal group is accepting storage traffic. | |
221 | */ | |
222 | spin_lock_bh(&tpg->tpg_state_lock); | |
223 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
224 | spin_unlock_bh(&tpg->tpg_state_lock); | |
225 | return -1; | |
226 | } | |
227 | spin_unlock_bh(&tpg->tpg_state_lock); | |
228 | ||
229 | /* | |
230 | * Here we serialize access across the TIQN+TPG Tuple. | |
231 | */ | |
a91eb7d9 | 232 | ret = down_interruptible(&tpg->np_login_sem); |
ee7619f2 | 233 | if (ret != 0) |
e48354ce NB |
234 | return -1; |
235 | ||
a91eb7d9 NB |
236 | spin_lock_bh(&tpg->tpg_state_lock); |
237 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
238 | spin_unlock_bh(&tpg->tpg_state_lock); | |
239 | up(&tpg->np_login_sem); | |
240 | return -1; | |
241 | } | |
242 | spin_unlock_bh(&tpg->tpg_state_lock); | |
e48354ce NB |
243 | |
244 | return 0; | |
245 | } | |
246 | ||
a91eb7d9 NB |
247 | void iscsit_login_kref_put(struct kref *kref) |
248 | { | |
249 | struct iscsi_tpg_np *tpg_np = container_of(kref, | |
250 | struct iscsi_tpg_np, tpg_np_kref); | |
251 | ||
252 | complete(&tpg_np->tpg_np_comp); | |
253 | } | |
254 | ||
255 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg, | |
256 | struct iscsi_tpg_np *tpg_np) | |
e48354ce NB |
257 | { |
258 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
259 | ||
a91eb7d9 | 260 | up(&tpg->np_login_sem); |
e48354ce | 261 | |
a91eb7d9 NB |
262 | if (tpg_np) |
263 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
e48354ce NB |
264 | |
265 | if (tiqn) | |
266 | iscsit_put_tiqn_for_login(tiqn); | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
05b96892 | 271 | bool iscsit_check_np_match( |
13a3cf08 | 272 | struct sockaddr_storage *sockaddr, |
05b96892 | 273 | struct iscsi_np *np, |
e48354ce NB |
274 | int network_transport) |
275 | { | |
276 | struct sockaddr_in *sock_in, *sock_in_e; | |
277 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
05b96892 | 278 | bool ip_match = false; |
69d75574 | 279 | u16 port, port_e; |
e48354ce | 280 | |
05b96892 NB |
281 | if (sockaddr->ss_family == AF_INET6) { |
282 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
283 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
284 | ||
285 | if (!memcmp(&sock_in6->sin6_addr.in6_u, | |
286 | &sock_in6_e->sin6_addr.in6_u, | |
287 | sizeof(struct in6_addr))) | |
288 | ip_match = true; | |
289 | ||
290 | port = ntohs(sock_in6->sin6_port); | |
69d75574 | 291 | port_e = ntohs(sock_in6_e->sin6_port); |
05b96892 NB |
292 | } else { |
293 | sock_in = (struct sockaddr_in *)sockaddr; | |
294 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
295 | ||
296 | if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) | |
297 | ip_match = true; | |
298 | ||
299 | port = ntohs(sock_in->sin_port); | |
69d75574 | 300 | port_e = ntohs(sock_in_e->sin_port); |
05b96892 NB |
301 | } |
302 | ||
69d75574 | 303 | if (ip_match && (port_e == port) && |
05b96892 NB |
304 | (np->np_network_transport == network_transport)) |
305 | return true; | |
306 | ||
307 | return false; | |
308 | } | |
309 | ||
ee291e63 AG |
310 | /* |
311 | * Called with mutex np_lock held | |
312 | */ | |
05b96892 | 313 | static struct iscsi_np *iscsit_get_np( |
13a3cf08 | 314 | struct sockaddr_storage *sockaddr, |
05b96892 NB |
315 | int network_transport) |
316 | { | |
317 | struct iscsi_np *np; | |
318 | bool match; | |
319 | ||
e48354ce | 320 | list_for_each_entry(np, &g_np_list, np_list) { |
ee291e63 | 321 | spin_lock_bh(&np->np_thread_lock); |
e48354ce | 322 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { |
ee291e63 | 323 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
324 | continue; |
325 | } | |
326 | ||
05b96892 | 327 | match = iscsit_check_np_match(sockaddr, np, network_transport); |
0bcc297e | 328 | if (match) { |
e48354ce NB |
329 | /* |
330 | * Increment the np_exports reference count now to | |
331 | * prevent iscsit_del_np() below from being called | |
332 | * while iscsi_tpg_add_network_portal() is called. | |
333 | */ | |
334 | np->np_exports++; | |
ee291e63 | 335 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
336 | return np; |
337 | } | |
ee291e63 | 338 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce | 339 | } |
e48354ce NB |
340 | |
341 | return NULL; | |
342 | } | |
343 | ||
344 | struct iscsi_np *iscsit_add_np( | |
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 NB |
361 | |
362 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
363 | if (!np) { | |
364 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
ee291e63 | 365 | mutex_unlock(&np_lock); |
e48354ce NB |
366 | return ERR_PTR(-ENOMEM); |
367 | } | |
368 | ||
369 | np->np_flags |= NPF_IP_NETWORK; | |
e48354ce NB |
370 | np->np_network_transport = network_transport; |
371 | spin_lock_init(&np->np_thread_lock); | |
372 | init_completion(&np->np_restart_comp); | |
373 | INIT_LIST_HEAD(&np->np_list); | |
374 | ||
375 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
376 | if (ret != 0) { | |
377 | kfree(np); | |
ee291e63 | 378 | mutex_unlock(&np_lock); |
e48354ce NB |
379 | return ERR_PTR(ret); |
380 | } | |
381 | ||
382 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
383 | if (IS_ERR(np->np_thread)) { | |
384 | pr_err("Unable to create kthread: iscsi_np\n"); | |
385 | ret = PTR_ERR(np->np_thread); | |
386 | kfree(np); | |
ee291e63 | 387 | mutex_unlock(&np_lock); |
e48354ce NB |
388 | return ERR_PTR(ret); |
389 | } | |
390 | /* | |
391 | * Increment the np_exports reference count now to prevent | |
392 | * iscsit_del_np() below from being run while a new call to | |
393 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
394 | * active. We don't need to hold np->np_thread_lock at this | |
395 | * point because iscsi_np has not been added to g_np_list yet. | |
396 | */ | |
397 | np->np_exports = 1; | |
ee291e63 | 398 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
e48354ce | 399 | |
e48354ce | 400 | list_add_tail(&np->np_list, &g_np_list); |
ee291e63 | 401 | mutex_unlock(&np_lock); |
e48354ce | 402 | |
69d75574 AG |
403 | pr_debug("CORE[0] - Added Network Portal: %pISpc on %s\n", |
404 | &np->np_sockaddr, np->np_transport->name); | |
e48354ce NB |
405 | |
406 | return np; | |
407 | } | |
408 | ||
409 | int iscsit_reset_np_thread( | |
410 | struct iscsi_np *np, | |
411 | struct iscsi_tpg_np *tpg_np, | |
a91eb7d9 NB |
412 | struct iscsi_portal_group *tpg, |
413 | bool shutdown) | |
e48354ce NB |
414 | { |
415 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
416 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { |
417 | spin_unlock_bh(&np->np_thread_lock); | |
418 | return 0; | |
419 | } | |
420 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
421 | ||
422 | if (np->np_thread) { | |
423 | spin_unlock_bh(&np->np_thread_lock); | |
424 | send_sig(SIGINT, np->np_thread, 1); | |
425 | wait_for_completion(&np->np_restart_comp); | |
426 | spin_lock_bh(&np->np_thread_lock); | |
427 | } | |
428 | spin_unlock_bh(&np->np_thread_lock); | |
429 | ||
a91eb7d9 NB |
430 | if (tpg_np && shutdown) { |
431 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
432 | ||
433 | wait_for_completion(&tpg_np->tpg_np_comp); | |
434 | } | |
435 | ||
e48354ce NB |
436 | return 0; |
437 | } | |
438 | ||
baa4d64b | 439 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 440 | { |
bf6932f4 AV |
441 | if (np->np_socket) |
442 | sock_release(np->np_socket); | |
e48354ce NB |
443 | } |
444 | ||
445 | int iscsit_del_np(struct iscsi_np *np) | |
446 | { | |
447 | spin_lock_bh(&np->np_thread_lock); | |
448 | np->np_exports--; | |
449 | if (np->np_exports) { | |
2363d196 | 450 | np->enabled = true; |
e48354ce NB |
451 | spin_unlock_bh(&np->np_thread_lock); |
452 | return 0; | |
453 | } | |
454 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
455 | spin_unlock_bh(&np->np_thread_lock); | |
456 | ||
457 | if (np->np_thread) { | |
458 | /* | |
459 | * We need to send the signal to wakeup Linux/Net | |
460 | * which may be sleeping in sock_accept().. | |
461 | */ | |
462 | send_sig(SIGINT, np->np_thread, 1); | |
463 | kthread_stop(np->np_thread); | |
db6077fd | 464 | np->np_thread = NULL; |
e48354ce | 465 | } |
baa4d64b NB |
466 | |
467 | np->np_transport->iscsit_free_np(np); | |
e48354ce | 468 | |
ee291e63 | 469 | mutex_lock(&np_lock); |
e48354ce | 470 | list_del(&np->np_list); |
ee291e63 | 471 | mutex_unlock(&np_lock); |
e48354ce | 472 | |
69d75574 AG |
473 | pr_debug("CORE[0] - Removed Network Portal: %pISpc on %s\n", |
474 | &np->np_sockaddr, np->np_transport->name); | |
e48354ce | 475 | |
baa4d64b | 476 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
477 | kfree(np); |
478 | return 0; | |
479 | } | |
480 | ||
e8205cca | 481 | static void iscsit_get_rx_pdu(struct iscsi_conn *); |
2ec5a8c1 | 482 | |
d2faaefb | 483 | int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
2ec5a8c1 NB |
484 | { |
485 | iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); | |
486 | return 0; | |
487 | } | |
d2faaefb | 488 | EXPORT_SYMBOL(iscsit_queue_rsp); |
2ec5a8c1 | 489 | |
d2faaefb | 490 | void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
131e6abc NB |
491 | { |
492 | bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD); | |
493 | ||
494 | spin_lock_bh(&conn->cmd_lock); | |
064cdd2d NB |
495 | if (!list_empty(&cmd->i_conn_node) && |
496 | !(cmd->se_cmd.transport_state & CMD_T_FABRIC_STOP)) | |
131e6abc NB |
497 | list_del_init(&cmd->i_conn_node); |
498 | spin_unlock_bh(&conn->cmd_lock); | |
499 | ||
500 | __iscsit_free_cmd(cmd, scsi_cmd, true); | |
501 | } | |
d2faaefb | 502 | EXPORT_SYMBOL(iscsit_aborted_task); |
131e6abc | 503 | |
2854bb23 VP |
504 | static void iscsit_do_crypto_hash_buf(struct ahash_request *, const void *, |
505 | u32, u32, u8 *, u8 *); | |
506 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *); | |
507 | ||
508 | static int | |
509 | iscsit_xmit_nondatain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
510 | const void *data_buf, u32 data_buf_len) | |
511 | { | |
512 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)cmd->pdu; | |
513 | struct kvec *iov; | |
514 | u32 niov = 0, tx_size = ISCSI_HDR_LEN; | |
515 | int ret; | |
516 | ||
517 | iov = &cmd->iov_misc[0]; | |
518 | iov[niov].iov_base = cmd->pdu; | |
519 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
520 | ||
521 | if (conn->conn_ops->HeaderDigest) { | |
522 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
523 | ||
524 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr, | |
525 | ISCSI_HDR_LEN, 0, NULL, | |
526 | (u8 *)header_digest); | |
527 | ||
528 | iov[0].iov_len += ISCSI_CRC_LEN; | |
529 | tx_size += ISCSI_CRC_LEN; | |
530 | pr_debug("Attaching CRC32C HeaderDigest" | |
531 | " to opcode 0x%x 0x%08x\n", | |
532 | hdr->opcode, *header_digest); | |
533 | } | |
534 | ||
535 | if (data_buf_len) { | |
536 | u32 padding = ((-data_buf_len) & 3); | |
537 | ||
538 | iov[niov].iov_base = (void *)data_buf; | |
539 | iov[niov++].iov_len = data_buf_len; | |
540 | tx_size += data_buf_len; | |
541 | ||
542 | if (padding != 0) { | |
543 | iov[niov].iov_base = &cmd->pad_bytes; | |
544 | iov[niov++].iov_len = padding; | |
545 | tx_size += padding; | |
546 | pr_debug("Attaching %u additional" | |
547 | " padding bytes.\n", padding); | |
548 | } | |
549 | ||
550 | if (conn->conn_ops->DataDigest) { | |
551 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, | |
552 | data_buf, data_buf_len, | |
553 | padding, | |
554 | (u8 *)&cmd->pad_bytes, | |
555 | (u8 *)&cmd->data_crc); | |
556 | ||
557 | iov[niov].iov_base = &cmd->data_crc; | |
558 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
559 | tx_size += ISCSI_CRC_LEN; | |
560 | pr_debug("Attached DataDigest for %u" | |
561 | " bytes opcode 0x%x, CRC 0x%08x\n", | |
562 | data_buf_len, hdr->opcode, cmd->data_crc); | |
563 | } | |
564 | } | |
565 | ||
566 | cmd->iov_misc_count = niov; | |
567 | cmd->tx_size = tx_size; | |
568 | ||
569 | ret = iscsit_send_tx_data(cmd, conn, 1); | |
570 | if (ret < 0) { | |
571 | iscsit_tx_thread_wait_for_tcp(conn); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
578 | static int iscsit_map_iovec(struct iscsi_cmd *, struct kvec *, u32, u32); | |
579 | static void iscsit_unmap_iovec(struct iscsi_cmd *); | |
580 | static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsi_cmd *, | |
581 | u32, u32, u32, u8 *); | |
582 | static int | |
583 | iscsit_xmit_datain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
584 | const struct iscsi_datain *datain) | |
585 | { | |
586 | struct kvec *iov; | |
587 | u32 iov_count = 0, tx_size = 0; | |
588 | int ret, iov_ret; | |
589 | ||
590 | iov = &cmd->iov_data[0]; | |
591 | iov[iov_count].iov_base = cmd->pdu; | |
592 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
593 | tx_size += ISCSI_HDR_LEN; | |
594 | ||
595 | if (conn->conn_ops->HeaderDigest) { | |
596 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
597 | ||
598 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu, | |
599 | ISCSI_HDR_LEN, 0, NULL, | |
600 | (u8 *)header_digest); | |
601 | ||
602 | iov[0].iov_len += ISCSI_CRC_LEN; | |
603 | tx_size += ISCSI_CRC_LEN; | |
604 | ||
605 | pr_debug("Attaching CRC32 HeaderDigest for DataIN PDU 0x%08x\n", | |
606 | *header_digest); | |
607 | } | |
608 | ||
609 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], | |
610 | datain->offset, datain->length); | |
611 | if (iov_ret < 0) | |
612 | return -1; | |
613 | ||
614 | iov_count += iov_ret; | |
615 | tx_size += datain->length; | |
616 | ||
617 | cmd->padding = ((-datain->length) & 3); | |
618 | if (cmd->padding) { | |
619 | iov[iov_count].iov_base = cmd->pad_bytes; | |
620 | iov[iov_count++].iov_len = cmd->padding; | |
621 | tx_size += cmd->padding; | |
622 | ||
623 | pr_debug("Attaching %u padding bytes\n", cmd->padding); | |
624 | } | |
625 | ||
626 | if (conn->conn_ops->DataDigest) { | |
627 | cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash, | |
628 | cmd, datain->offset, | |
629 | datain->length, | |
630 | cmd->padding, | |
631 | cmd->pad_bytes); | |
632 | ||
633 | iov[iov_count].iov_base = &cmd->data_crc; | |
634 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
635 | tx_size += ISCSI_CRC_LEN; | |
636 | ||
637 | pr_debug("Attached CRC32C DataDigest %d bytes, crc 0x%08x\n", | |
638 | datain->length + cmd->padding, cmd->data_crc); | |
639 | } | |
640 | ||
641 | cmd->iov_data_count = iov_count; | |
642 | cmd->tx_size = tx_size; | |
643 | ||
644 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
645 | ||
646 | iscsit_unmap_iovec(cmd); | |
647 | ||
648 | if (ret < 0) { | |
649 | iscsit_tx_thread_wait_for_tcp(conn); | |
650 | return ret; | |
651 | } | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
656 | static int iscsit_xmit_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
657 | struct iscsi_datain_req *dr, const void *buf, | |
658 | u32 buf_len) | |
659 | { | |
660 | if (dr) | |
661 | return iscsit_xmit_datain_pdu(conn, cmd, buf); | |
662 | else | |
663 | return iscsit_xmit_nondatain_pdu(conn, cmd, buf, buf_len); | |
664 | } | |
665 | ||
e70beee7 NB |
666 | static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn) |
667 | { | |
668 | return TARGET_PROT_NORMAL; | |
669 | } | |
670 | ||
baa4d64b NB |
671 | static struct iscsit_transport iscsi_target_transport = { |
672 | .name = "iSCSI/TCP", | |
673 | .transport_type = ISCSI_TCP, | |
bd027d85 | 674 | .rdma_shutdown = false, |
baa4d64b NB |
675 | .owner = NULL, |
676 | .iscsit_setup_np = iscsit_setup_np, | |
677 | .iscsit_accept_np = iscsit_accept_np, | |
678 | .iscsit_free_np = iscsit_free_np, | |
679 | .iscsit_get_login_rx = iscsit_get_login_rx, | |
680 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 681 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
682 | .iscsit_immediate_queue = iscsit_immediate_queue, |
683 | .iscsit_response_queue = iscsit_response_queue, | |
684 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
685 | .iscsit_queue_status = iscsit_queue_rsp, | |
131e6abc | 686 | .iscsit_aborted_task = iscsit_aborted_task, |
2854bb23 | 687 | .iscsit_xmit_pdu = iscsit_xmit_pdu, |
e8205cca | 688 | .iscsit_get_rx_pdu = iscsit_get_rx_pdu, |
e70beee7 | 689 | .iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops, |
baa4d64b NB |
690 | }; |
691 | ||
e48354ce NB |
692 | static int __init iscsi_target_init_module(void) |
693 | { | |
88dcd2da | 694 | int ret = 0, size; |
e48354ce NB |
695 | |
696 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
697 | ||
698 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
699 | if (!iscsit_global) { | |
700 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
701 | return -1; | |
702 | } | |
88dcd2da | 703 | spin_lock_init(&iscsit_global->ts_bitmap_lock); |
e48354ce NB |
704 | mutex_init(&auth_id_lock); |
705 | spin_lock_init(&sess_idr_lock); | |
706 | idr_init(&tiqn_idr); | |
707 | idr_init(&sess_idr); | |
708 | ||
9ac8928e CH |
709 | ret = target_register_template(&iscsi_ops); |
710 | if (ret) | |
e48354ce NB |
711 | goto out; |
712 | ||
88dcd2da NB |
713 | size = BITS_TO_LONGS(ISCSIT_BITMAP_BITS) * sizeof(long); |
714 | iscsit_global->ts_bitmap = vzalloc(size); | |
715 | if (!iscsit_global->ts_bitmap) { | |
716 | pr_err("Unable to allocate iscsit_global->ts_bitmap\n"); | |
e48354ce | 717 | goto configfs_out; |
e48354ce NB |
718 | } |
719 | ||
e48354ce NB |
720 | lio_qr_cache = kmem_cache_create("lio_qr_cache", |
721 | sizeof(struct iscsi_queue_req), | |
722 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
723 | if (!lio_qr_cache) { | |
724 | pr_err("nable to kmem_cache_create() for" | |
725 | " lio_qr_cache\n"); | |
88dcd2da | 726 | goto bitmap_out; |
e48354ce NB |
727 | } |
728 | ||
729 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
730 | sizeof(struct iscsi_datain_req), | |
731 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
732 | if (!lio_dr_cache) { | |
733 | pr_err("Unable to kmem_cache_create() for" | |
734 | " lio_dr_cache\n"); | |
735 | goto qr_out; | |
736 | } | |
737 | ||
738 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
739 | sizeof(struct iscsi_ooo_cmdsn), | |
740 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
741 | if (!lio_ooo_cache) { | |
742 | pr_err("Unable to kmem_cache_create() for" | |
743 | " lio_ooo_cache\n"); | |
744 | goto dr_out; | |
745 | } | |
746 | ||
747 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
748 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
749 | 0, NULL); | |
750 | if (!lio_r2t_cache) { | |
751 | pr_err("Unable to kmem_cache_create() for" | |
752 | " lio_r2t_cache\n"); | |
753 | goto ooo_out; | |
754 | } | |
755 | ||
baa4d64b NB |
756 | iscsit_register_transport(&iscsi_target_transport); |
757 | ||
e48354ce NB |
758 | if (iscsit_load_discovery_tpg() < 0) |
759 | goto r2t_out; | |
760 | ||
761 | return ret; | |
762 | r2t_out: | |
7f2c53bb | 763 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
764 | kmem_cache_destroy(lio_r2t_cache); |
765 | ooo_out: | |
766 | kmem_cache_destroy(lio_ooo_cache); | |
767 | dr_out: | |
768 | kmem_cache_destroy(lio_dr_cache); | |
769 | qr_out: | |
770 | kmem_cache_destroy(lio_qr_cache); | |
88dcd2da NB |
771 | bitmap_out: |
772 | vfree(iscsit_global->ts_bitmap); | |
e48354ce | 773 | configfs_out: |
9ac8928e CH |
774 | /* XXX: this probably wants it to be it's own unwind step.. */ |
775 | if (iscsit_global->discovery_tpg) | |
776 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
777 | target_unregister_template(&iscsi_ops); | |
e48354ce NB |
778 | out: |
779 | kfree(iscsit_global); | |
780 | return -ENOMEM; | |
781 | } | |
782 | ||
783 | static void __exit iscsi_target_cleanup_module(void) | |
784 | { | |
e48354ce | 785 | iscsit_release_discovery_tpg(); |
baa4d64b | 786 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
787 | kmem_cache_destroy(lio_qr_cache); |
788 | kmem_cache_destroy(lio_dr_cache); | |
789 | kmem_cache_destroy(lio_ooo_cache); | |
790 | kmem_cache_destroy(lio_r2t_cache); | |
791 | ||
9ac8928e CH |
792 | /* |
793 | * Shutdown discovery sessions and disable discovery TPG | |
794 | */ | |
795 | if (iscsit_global->discovery_tpg) | |
796 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
e48354ce | 797 | |
9ac8928e | 798 | target_unregister_template(&iscsi_ops); |
e48354ce | 799 | |
88dcd2da | 800 | vfree(iscsit_global->ts_bitmap); |
e48354ce NB |
801 | kfree(iscsit_global); |
802 | } | |
803 | ||
d2faaefb | 804 | int iscsit_add_reject( |
ba159914 | 805 | struct iscsi_conn *conn, |
e48354ce | 806 | u8 reason, |
ba159914 | 807 | unsigned char *buf) |
e48354ce NB |
808 | { |
809 | struct iscsi_cmd *cmd; | |
e48354ce | 810 | |
676687c6 | 811 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
e48354ce NB |
812 | if (!cmd) |
813 | return -1; | |
814 | ||
815 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 816 | cmd->reject_reason = reason; |
e48354ce | 817 | |
1c3d5794 | 818 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
819 | if (!cmd->buf_ptr) { |
820 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 821 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
822 | return -1; |
823 | } | |
e48354ce NB |
824 | |
825 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 826 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
827 | spin_unlock_bh(&conn->cmd_lock); |
828 | ||
829 | cmd->i_state = ISTATE_SEND_REJECT; | |
830 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
831 | ||
ba159914 | 832 | return -1; |
e48354ce | 833 | } |
d2faaefb | 834 | EXPORT_SYMBOL(iscsit_add_reject); |
e48354ce | 835 | |
ba159914 NB |
836 | static int iscsit_add_reject_from_cmd( |
837 | struct iscsi_cmd *cmd, | |
e48354ce | 838 | u8 reason, |
ba159914 NB |
839 | bool add_to_conn, |
840 | unsigned char *buf) | |
e48354ce NB |
841 | { |
842 | struct iscsi_conn *conn; | |
e48354ce NB |
843 | |
844 | if (!cmd->conn) { | |
845 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
846 | cmd->init_task_tag); | |
847 | return -1; | |
848 | } | |
849 | conn = cmd->conn; | |
850 | ||
851 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 852 | cmd->reject_reason = reason; |
e48354ce | 853 | |
1c3d5794 | 854 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
855 | if (!cmd->buf_ptr) { |
856 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 857 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
858 | return -1; |
859 | } | |
e48354ce NB |
860 | |
861 | if (add_to_conn) { | |
862 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 863 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
864 | spin_unlock_bh(&conn->cmd_lock); |
865 | } | |
866 | ||
867 | cmd->i_state = ISTATE_SEND_REJECT; | |
868 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
3e1c81a9 NB |
869 | /* |
870 | * Perform the kref_put now if se_cmd has already been setup by | |
871 | * scsit_setup_scsi_cmd() | |
872 | */ | |
873 | if (cmd->se_cmd.se_tfo != NULL) { | |
874 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); | |
afc16604 | 875 | target_put_sess_cmd(&cmd->se_cmd); |
3e1c81a9 | 876 | } |
ba159914 NB |
877 | return -1; |
878 | } | |
e48354ce | 879 | |
ba159914 NB |
880 | static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, |
881 | unsigned char *buf) | |
882 | { | |
883 | return iscsit_add_reject_from_cmd(cmd, reason, true, buf); | |
884 | } | |
885 | ||
886 | int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) | |
887 | { | |
888 | return iscsit_add_reject_from_cmd(cmd, reason, false, buf); | |
e48354ce | 889 | } |
d2faaefb | 890 | EXPORT_SYMBOL(iscsit_reject_cmd); |
e48354ce NB |
891 | |
892 | /* | |
893 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 894 | * kernel sockets to copy data in/out. |
e48354ce NB |
895 | */ |
896 | static int iscsit_map_iovec( | |
897 | struct iscsi_cmd *cmd, | |
898 | struct kvec *iov, | |
899 | u32 data_offset, | |
900 | u32 data_length) | |
901 | { | |
902 | u32 i = 0; | |
903 | struct scatterlist *sg; | |
904 | unsigned int page_off; | |
905 | ||
906 | /* | |
bfb79eac | 907 | * We know each entry in t_data_sg contains a page. |
e48354ce | 908 | */ |
2b16509c IH |
909 | u32 ent = data_offset / PAGE_SIZE; |
910 | ||
911 | if (ent >= cmd->se_cmd.t_data_nents) { | |
912 | pr_err("Initial page entry out-of-bounds\n"); | |
913 | return -1; | |
914 | } | |
915 | ||
916 | sg = &cmd->se_cmd.t_data_sg[ent]; | |
e48354ce NB |
917 | page_off = (data_offset % PAGE_SIZE); |
918 | ||
919 | cmd->first_data_sg = sg; | |
920 | cmd->first_data_sg_off = page_off; | |
921 | ||
922 | while (data_length) { | |
923 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
924 | ||
925 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
926 | iov[i].iov_len = cur_len; | |
927 | ||
928 | data_length -= cur_len; | |
929 | page_off = 0; | |
930 | sg = sg_next(sg); | |
931 | i++; | |
932 | } | |
933 | ||
934 | cmd->kmapped_nents = i; | |
935 | ||
936 | return i; | |
937 | } | |
938 | ||
939 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
940 | { | |
941 | u32 i; | |
942 | struct scatterlist *sg; | |
943 | ||
944 | sg = cmd->first_data_sg; | |
945 | ||
946 | for (i = 0; i < cmd->kmapped_nents; i++) | |
947 | kunmap(sg_page(&sg[i])); | |
948 | } | |
949 | ||
950 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
951 | { | |
f56cbbb4 NB |
952 | LIST_HEAD(ack_list); |
953 | struct iscsi_cmd *cmd, *cmd_p; | |
e48354ce NB |
954 | |
955 | conn->exp_statsn = exp_statsn; | |
956 | ||
3e1c81a9 NB |
957 | if (conn->sess->sess_ops->RDMAExtensions) |
958 | return; | |
959 | ||
e48354ce | 960 | spin_lock_bh(&conn->cmd_lock); |
f56cbbb4 | 961 | list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
962 | spin_lock(&cmd->istate_lock); |
963 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 964 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
965 | cmd->i_state = ISTATE_REMOVE; |
966 | spin_unlock(&cmd->istate_lock); | |
f56cbbb4 | 967 | list_move_tail(&cmd->i_conn_node, &ack_list); |
e48354ce NB |
968 | continue; |
969 | } | |
970 | spin_unlock(&cmd->istate_lock); | |
971 | } | |
972 | spin_unlock_bh(&conn->cmd_lock); | |
f56cbbb4 NB |
973 | |
974 | list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { | |
5159d763 | 975 | list_del_init(&cmd->i_conn_node); |
f56cbbb4 NB |
976 | iscsit_free_cmd(cmd, false); |
977 | } | |
e48354ce NB |
978 | } |
979 | ||
980 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
981 | { | |
f80e8ed3 | 982 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 983 | |
c0427f15 | 984 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
985 | |
986 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
987 | if (!cmd->iov_data) { | |
988 | pr_err("Unable to allocate cmd->iov_data\n"); | |
989 | return -ENOMEM; | |
990 | } | |
991 | ||
992 | cmd->orig_iov_data_count = iov_count; | |
993 | return 0; | |
994 | } | |
995 | ||
3e1c81a9 NB |
996 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
997 | unsigned char *buf) | |
e48354ce | 998 | { |
3e1c81a9 | 999 | int data_direction, payload_length; |
e48354ce | 1000 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
1001 | int iscsi_task_attr; |
1002 | int sam_task_attr; | |
e48354ce | 1003 | |
04f3b31b | 1004 | atomic_long_inc(&conn->sess->cmd_pdus); |
e48354ce NB |
1005 | |
1006 | hdr = (struct iscsi_scsi_req *) buf; | |
1007 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
1008 | |
1009 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
1010 | ||
1011 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
1012 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
1013 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
1014 | " not set. Bad iSCSI Initiator.\n"); | |
ba159914 NB |
1015 | return iscsit_add_reject_cmd(cmd, |
1016 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1017 | } |
1018 | ||
1019 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
1020 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
1021 | /* | |
4454b66c NB |
1022 | * From RFC-3720 Section 10.3.1: |
1023 | * | |
1024 | * "Either or both of R and W MAY be 1 when either the | |
1025 | * Expected Data Transfer Length and/or Bidirectional Read | |
1026 | * Expected Data Transfer Length are 0" | |
1027 | * | |
1028 | * For this case, go ahead and clear the unnecssary bits | |
1029 | * to avoid any confusion with ->data_direction. | |
e48354ce | 1030 | */ |
4454b66c NB |
1031 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; |
1032 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
e48354ce | 1033 | |
4454b66c | 1034 | pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" |
e48354ce | 1035 | " set when Expected Data Transfer Length is 0 for" |
4454b66c | 1036 | " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); |
e48354ce | 1037 | } |
e48354ce NB |
1038 | |
1039 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
1040 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
1041 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
1042 | " MUST be set if Expected Data Transfer Length is not 0." | |
1043 | " Bad iSCSI Initiator\n"); | |
ba159914 NB |
1044 | return iscsit_add_reject_cmd(cmd, |
1045 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1046 | } |
1047 | ||
1048 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
1049 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
1050 | pr_err("Bidirectional operations not supported!\n"); | |
ba159914 NB |
1051 | return iscsit_add_reject_cmd(cmd, |
1052 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1053 | } |
1054 | ||
1055 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1056 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
1057 | " Scsi Command PDU.\n"); | |
ba159914 NB |
1058 | return iscsit_add_reject_cmd(cmd, |
1059 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1060 | } |
1061 | ||
1062 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
1063 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
1064 | " protocol error.\n", payload_length); | |
ba159914 NB |
1065 | return iscsit_add_reject_cmd(cmd, |
1066 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1067 | } |
1068 | ||
ba159914 | 1069 | if ((be32_to_cpu(hdr->data_length) == payload_length) && |
e48354ce NB |
1070 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
1071 | pr_err("Expected Data Transfer Length and Length of" | |
1072 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
1073 | " bit is not set protocol error\n"); | |
ba159914 NB |
1074 | return iscsit_add_reject_cmd(cmd, |
1075 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1076 | } |
1077 | ||
50e5c87d | 1078 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
1079 | pr_err("DataSegmentLength: %u is greater than" |
1080 | " EDTL: %u, protocol error.\n", payload_length, | |
1081 | hdr->data_length); | |
ba159914 NB |
1082 | return iscsit_add_reject_cmd(cmd, |
1083 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1084 | } |
1085 | ||
21f5aa7e | 1086 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1087 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1088 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
1089 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1090 | return iscsit_add_reject_cmd(cmd, |
1091 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1092 | } |
1093 | ||
1094 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
1095 | pr_err("DataSegmentLength: %u is greater than" | |
1096 | " FirstBurstLength: %u, protocol error.\n", | |
1097 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
ba159914 NB |
1098 | return iscsit_add_reject_cmd(cmd, |
1099 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1100 | } |
1101 | ||
1102 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
1103 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
1104 | DMA_NONE; | |
1105 | ||
d28b1169 | 1106 | cmd->data_direction = data_direction; |
d28b1169 AG |
1107 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
1108 | /* | |
1109 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
1110 | */ | |
1111 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
1112 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
68d81f40 | 1113 | sam_task_attr = TCM_SIMPLE_TAG; |
d28b1169 | 1114 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) |
68d81f40 | 1115 | sam_task_attr = TCM_ORDERED_TAG; |
d28b1169 | 1116 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) |
68d81f40 | 1117 | sam_task_attr = TCM_HEAD_TAG; |
d28b1169 | 1118 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) |
68d81f40 | 1119 | sam_task_attr = TCM_ACA_TAG; |
d28b1169 AG |
1120 | else { |
1121 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
68d81f40 CH |
1122 | " TCM_SIMPLE_TAG\n", iscsi_task_attr); |
1123 | sam_task_attr = TCM_SIMPLE_TAG; | |
d28b1169 AG |
1124 | } |
1125 | ||
e48354ce NB |
1126 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
1127 | cmd->i_state = ISTATE_NEW_CMD; | |
1128 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1129 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
1130 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
1131 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
1132 | if (cmd->unsolicited_data) | |
1133 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
1134 | ||
1135 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
9547308b | 1136 | if (hdr->flags & ISCSI_FLAG_CMD_READ) |
c1e34b64 | 1137 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); |
9547308b | 1138 | else |
e48354ce | 1139 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
50e5c87d CH |
1140 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1141 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1142 | cmd->first_burst_len = payload_length; |
1143 | ||
3e1c81a9 NB |
1144 | if (!conn->sess->sess_ops->RDMAExtensions && |
1145 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
1146 | struct iscsi_datain_req *dr; |
1147 | ||
1148 | dr = iscsit_allocate_datain_req(); | |
1149 | if (!dr) | |
ba159914 NB |
1150 | return iscsit_add_reject_cmd(cmd, |
1151 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1152 | |
1153 | iscsit_attach_datain_req(cmd, dr); | |
1154 | } | |
1155 | ||
065ca1e4 AG |
1156 | /* |
1157 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
1158 | */ | |
9ac8928e | 1159 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
50e5c87d CH |
1160 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
1161 | cmd->data_direction, sam_task_attr, | |
1162 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
1163 | |
1164 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
1165 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
1166 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
1167 | conn->cid); | |
1168 | ||
afc16604 | 1169 | target_get_sess_cmd(&cmd->se_cmd, true); |
065ca1e4 | 1170 | |
de103c93 CH |
1171 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
1172 | scsilun_to_int(&hdr->lun)); | |
1173 | if (cmd->sense_reason) | |
1174 | goto attach_cmd; | |
1175 | ||
649ee054 BVA |
1176 | /* only used for printks or comparing with ->ref_task_tag */ |
1177 | cmd->se_cmd.tag = (__force u32)cmd->init_task_tag; | |
de103c93 CH |
1178 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); |
1179 | if (cmd->sense_reason) { | |
1180 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
ba159914 NB |
1181 | return iscsit_add_reject_cmd(cmd, |
1182 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce | 1183 | } |
de103c93 | 1184 | |
e48354ce NB |
1185 | goto attach_cmd; |
1186 | } | |
a12f41f8 | 1187 | |
de103c93 | 1188 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
ba159914 NB |
1189 | return iscsit_add_reject_cmd(cmd, |
1190 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1191 | } |
1192 | ||
1193 | attach_cmd: | |
1194 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1195 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1196 | spin_unlock_bh(&conn->cmd_lock); |
1197 | /* | |
1198 | * Check if we need to delay processing because of ALUA | |
1199 | * Active/NonOptimized primary access state.. | |
1200 | */ | |
1201 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1202 | |
3e1c81a9 NB |
1203 | return 0; |
1204 | } | |
1205 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1206 | |
3e1c81a9 NB |
1207 | void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) |
1208 | { | |
1209 | iscsit_set_dataout_sequence_values(cmd); | |
1210 | ||
1211 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1212 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1213 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1214 | } | |
1215 | EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); | |
1216 | ||
1217 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1218 | struct iscsi_scsi_req *hdr) | |
1219 | { | |
1220 | int cmdsn_ret = 0; | |
e48354ce NB |
1221 | /* |
1222 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1223 | * the Immediate Bit is not set, and no Immediate | |
1224 | * Data is attached. | |
1225 | * | |
1226 | * A PDU/CmdSN carrying Immediate Data can only | |
1227 | * be processed after the DataCRC has passed. | |
1228 | * If the DataCRC fails, the CmdSN MUST NOT | |
1229 | * be acknowledged. (See below) | |
1230 | */ | |
1231 | if (!cmd->immediate_data) { | |
561bf158 NB |
1232 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1233 | (unsigned char *)hdr, hdr->cmdsn); | |
1234 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1235 | return -1; | |
1236 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
afc16604 | 1237 | target_put_sess_cmd(&cmd->se_cmd); |
7e32da55 | 1238 | return 0; |
3e1c81a9 | 1239 | } |
e48354ce NB |
1240 | } |
1241 | ||
50e5c87d | 1242 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1243 | |
1244 | /* | |
1245 | * If no Immediate Data is attached, it's OK to return now. | |
1246 | */ | |
1247 | if (!cmd->immediate_data) { | |
3e1c81a9 NB |
1248 | if (!cmd->sense_reason && cmd->unsolicited_data) |
1249 | iscsit_set_unsoliticed_dataout(cmd); | |
1250 | if (!cmd->sense_reason) | |
1251 | return 0; | |
e48354ce | 1252 | |
afc16604 | 1253 | target_put_sess_cmd(&cmd->se_cmd); |
e48354ce NB |
1254 | return 0; |
1255 | } | |
1256 | ||
1257 | /* | |
3e1c81a9 NB |
1258 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1259 | * execution. These exceptions are processed in CmdSN order using | |
1260 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1261 | */ |
de103c93 | 1262 | if (cmd->sense_reason) { |
561bf158 NB |
1263 | if (cmd->reject_reason) |
1264 | return 0; | |
1265 | ||
3e1c81a9 | 1266 | return 1; |
e48354ce NB |
1267 | } |
1268 | /* | |
1269 | * Call directly into transport_generic_new_cmd() to perform | |
1270 | * the backend memory allocation. | |
1271 | */ | |
de103c93 | 1272 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
561bf158 | 1273 | if (cmd->sense_reason) |
3e1c81a9 | 1274 | return 1; |
e48354ce | 1275 | |
3e1c81a9 NB |
1276 | return 0; |
1277 | } | |
1278 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1279 | ||
1280 | static int | |
1281 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1282 | bool dump_payload) | |
1283 | { | |
1284 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; | |
1285 | /* | |
1286 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1287 | */ | |
0bcc297e | 1288 | if (dump_payload) |
3e1c81a9 NB |
1289 | goto after_immediate_data; |
1290 | ||
1291 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1292 | cmd->first_burst_len); | |
e48354ce NB |
1293 | after_immediate_data: |
1294 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1295 | /* | |
1296 | * A PDU/CmdSN carrying Immediate Data passed | |
1297 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1298 | * Immediate Bit is not set. | |
1299 | */ | |
561bf158 NB |
1300 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, |
1301 | (unsigned char *)hdr, hdr->cmdsn); | |
9d86a2be | 1302 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
561bf158 | 1303 | return -1; |
3e1c81a9 | 1304 | |
9d86a2be | 1305 | if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
561bf158 NB |
1306 | int rc; |
1307 | ||
1308 | rc = iscsit_dump_data_payload(cmd->conn, | |
1309 | cmd->first_burst_len, 1); | |
afc16604 | 1310 | target_put_sess_cmd(&cmd->se_cmd); |
561bf158 | 1311 | return rc; |
3e1c81a9 NB |
1312 | } else if (cmd->unsolicited_data) |
1313 | iscsit_set_unsoliticed_dataout(cmd); | |
e48354ce | 1314 | |
e48354ce NB |
1315 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { |
1316 | /* | |
1317 | * Immediate Data failed DataCRC and ERL>=1, | |
1318 | * silently drop this PDU and let the initiator | |
1319 | * plug the CmdSN gap. | |
1320 | * | |
1321 | * FIXME: Send Unsolicited NOPIN with reserved | |
1322 | * TTT here to help the initiator figure out | |
1323 | * the missing CmdSN, although they should be | |
1324 | * intelligent enough to determine the missing | |
1325 | * CmdSN and issue a retry to plug the sequence. | |
1326 | */ | |
1327 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1328 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1329 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1330 | return -1; | |
1331 | ||
1332 | return 0; | |
1333 | } | |
1334 | ||
3e1c81a9 NB |
1335 | static int |
1336 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1337 | unsigned char *buf) | |
1338 | { | |
1339 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1340 | int rc, immed_data; | |
1341 | bool dump_payload = false; | |
1342 | ||
1343 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1344 | if (rc < 0) | |
561bf158 | 1345 | return 0; |
3e1c81a9 NB |
1346 | /* |
1347 | * Allocation iovecs needed for struct socket operations for | |
1348 | * traditional iSCSI block I/O. | |
1349 | */ | |
1350 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
b815fc12 | 1351 | return iscsit_reject_cmd(cmd, |
ba159914 | 1352 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); |
3e1c81a9 NB |
1353 | } |
1354 | immed_data = cmd->immediate_data; | |
1355 | ||
1356 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1357 | if (rc < 0) | |
1358 | return rc; | |
1359 | else if (rc > 0) | |
1360 | dump_payload = true; | |
1361 | ||
1362 | if (!immed_data) | |
1363 | return 0; | |
1364 | ||
1365 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1366 | } | |
1367 | ||
e48354ce | 1368 | static u32 iscsit_do_crypto_hash_sg( |
69110e3c | 1369 | struct ahash_request *hash, |
e48354ce NB |
1370 | struct iscsi_cmd *cmd, |
1371 | u32 data_offset, | |
1372 | u32 data_length, | |
1373 | u32 padding, | |
1374 | u8 *pad_bytes) | |
1375 | { | |
1376 | u32 data_crc; | |
e48354ce NB |
1377 | struct scatterlist *sg; |
1378 | unsigned int page_off; | |
1379 | ||
69110e3c | 1380 | crypto_ahash_init(hash); |
e48354ce NB |
1381 | |
1382 | sg = cmd->first_data_sg; | |
1383 | page_off = cmd->first_data_sg_off; | |
1384 | ||
e48354ce | 1385 | while (data_length) { |
aa75679c | 1386 | u32 cur_len = min_t(u32, data_length, (sg->length - page_off)); |
e48354ce | 1387 | |
69110e3c HX |
1388 | ahash_request_set_crypt(hash, sg, NULL, cur_len); |
1389 | crypto_ahash_update(hash); | |
e48354ce NB |
1390 | |
1391 | data_length -= cur_len; | |
1392 | page_off = 0; | |
aa75679c AP |
1393 | /* iscsit_map_iovec has already checked for invalid sg pointers */ |
1394 | sg = sg_next(sg); | |
e48354ce NB |
1395 | } |
1396 | ||
1397 | if (padding) { | |
1398 | struct scatterlist pad_sg; | |
1399 | ||
1400 | sg_init_one(&pad_sg, pad_bytes, padding); | |
69110e3c HX |
1401 | ahash_request_set_crypt(hash, &pad_sg, (u8 *)&data_crc, |
1402 | padding); | |
1403 | crypto_ahash_finup(hash); | |
1404 | } else { | |
1405 | ahash_request_set_crypt(hash, NULL, (u8 *)&data_crc, 0); | |
1406 | crypto_ahash_final(hash); | |
e48354ce | 1407 | } |
e48354ce NB |
1408 | |
1409 | return data_crc; | |
1410 | } | |
1411 | ||
1412 | static void iscsit_do_crypto_hash_buf( | |
69110e3c | 1413 | struct ahash_request *hash, |
80690fdb | 1414 | const void *buf, |
e48354ce NB |
1415 | u32 payload_length, |
1416 | u32 padding, | |
1417 | u8 *pad_bytes, | |
1418 | u8 *data_crc) | |
1419 | { | |
69110e3c | 1420 | struct scatterlist sg[2]; |
e48354ce | 1421 | |
69110e3c HX |
1422 | sg_init_table(sg, ARRAY_SIZE(sg)); |
1423 | sg_set_buf(sg, buf, payload_length); | |
1424 | sg_set_buf(sg + 1, pad_bytes, padding); | |
e48354ce | 1425 | |
69110e3c | 1426 | ahash_request_set_crypt(hash, sg, data_crc, payload_length + padding); |
e48354ce | 1427 | |
69110e3c | 1428 | crypto_ahash_digest(hash); |
e48354ce NB |
1429 | } |
1430 | ||
3e1c81a9 NB |
1431 | int |
1432 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, | |
1433 | struct iscsi_cmd **out_cmd) | |
e48354ce | 1434 | { |
3e1c81a9 | 1435 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
e48354ce NB |
1436 | struct iscsi_cmd *cmd = NULL; |
1437 | struct se_cmd *se_cmd; | |
3e1c81a9 NB |
1438 | u32 payload_length = ntoh24(hdr->dlength); |
1439 | int rc; | |
e48354ce NB |
1440 | |
1441 | if (!payload_length) { | |
dbcbc95c NB |
1442 | pr_warn("DataOUT payload is ZERO, ignoring.\n"); |
1443 | return 0; | |
e48354ce NB |
1444 | } |
1445 | ||
1446 | /* iSCSI write */ | |
04f3b31b | 1447 | atomic_long_add(payload_length, &conn->sess->rx_data_octets); |
e48354ce | 1448 | |
21f5aa7e | 1449 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1450 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1451 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1452 | conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1453 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
1454 | buf); | |
e48354ce NB |
1455 | } |
1456 | ||
1457 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1458 | payload_length); | |
1459 | if (!cmd) | |
1460 | return 0; | |
1461 | ||
1462 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1463 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1464 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1465 | payload_length, conn->cid); |
1466 | ||
1467 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1468 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1469 | " last DataOUT received, dumping payload\n", | |
1470 | cmd->init_task_tag); | |
1471 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1472 | } | |
1473 | ||
1474 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1475 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1476 | " NON-WRITE command.\n", cmd->init_task_tag); | |
97c99b47 | 1477 | return iscsit_dump_data_payload(conn, payload_length, 1); |
e48354ce NB |
1478 | } |
1479 | se_cmd = &cmd->se_cmd; | |
1480 | iscsit_mod_dataout_timer(cmd); | |
1481 | ||
50e5c87d | 1482 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1483 | pr_err("DataOut Offset: %u, Length %u greater than" |
1484 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1485 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
ba159914 | 1486 | return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); |
e48354ce NB |
1487 | } |
1488 | ||
1489 | if (cmd->unsolicited_data) { | |
1490 | int dump_unsolicited_data = 0; | |
1491 | ||
1492 | if (conn->sess->sess_ops->InitialR2T) { | |
1493 | pr_err("Received unexpected unsolicited data" | |
1494 | " while InitialR2T=Yes, protocol error.\n"); | |
1495 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1496 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1497 | return -1; | |
1498 | } | |
1499 | /* | |
1500 | * Special case for dealing with Unsolicited DataOUT | |
1501 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1502 | * failures; | |
1503 | */ | |
1504 | ||
1505 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
e48354ce | 1506 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); |
de103c93 | 1507 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce | 1508 | dump_unsolicited_data = 1; |
e48354ce NB |
1509 | |
1510 | if (dump_unsolicited_data) { | |
1511 | /* | |
1512 | * Check if a delayed TASK_ABORTED status needs to | |
1513 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
5a342521 | 1514 | * received with the unsolicited data out. |
e48354ce NB |
1515 | */ |
1516 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1517 | iscsit_stop_dataout_timer(cmd); | |
1518 | ||
1519 | transport_check_aborted_status(se_cmd, | |
1520 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1521 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1522 | } | |
1523 | } else { | |
1524 | /* | |
1525 | * For the normal solicited data path: | |
1526 | * | |
1527 | * Check for a delayed TASK_ABORTED status and dump any | |
1528 | * incoming data out payload if one exists. Also, when the | |
1529 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1530 | * data out sequence, we decrement outstanding_r2ts. Once | |
1531 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1532 | * TASK_ABORTED status. | |
1533 | */ | |
7d680f3b | 1534 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1535 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1536 | if (--cmd->outstanding_r2ts < 1) { | |
1537 | iscsit_stop_dataout_timer(cmd); | |
1538 | transport_check_aborted_status( | |
1539 | se_cmd, 1); | |
1540 | } | |
1541 | ||
1542 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1543 | } | |
1544 | } | |
1545 | /* | |
1546 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1547 | * within-command recovery checks before receiving the payload. | |
1548 | */ | |
3e1c81a9 NB |
1549 | rc = iscsit_check_pre_dataout(cmd, buf); |
1550 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1551 | return 0; |
3e1c81a9 | 1552 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce NB |
1553 | return -1; |
1554 | ||
3e1c81a9 NB |
1555 | *out_cmd = cmd; |
1556 | return 0; | |
1557 | } | |
1558 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); | |
1559 | ||
1560 | static int | |
1561 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1562 | struct iscsi_data *hdr) | |
1563 | { | |
1564 | struct kvec *iov; | |
1565 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1566 | u32 payload_length = ntoh24(hdr->dlength); | |
1567 | int iov_ret, data_crc_failed = 0; | |
1568 | ||
e48354ce NB |
1569 | rx_size += payload_length; |
1570 | iov = &cmd->iov_data[0]; | |
1571 | ||
50e5c87d CH |
1572 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1573 | payload_length); | |
e48354ce NB |
1574 | if (iov_ret < 0) |
1575 | return -1; | |
1576 | ||
1577 | iov_count += iov_ret; | |
1578 | ||
1579 | padding = ((-payload_length) & 3); | |
1580 | if (padding != 0) { | |
1581 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1582 | iov[iov_count++].iov_len = padding; | |
1583 | rx_size += padding; | |
1584 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1585 | } | |
1586 | ||
1587 | if (conn->conn_ops->DataDigest) { | |
1588 | iov[iov_count].iov_base = &checksum; | |
1589 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1590 | rx_size += ISCSI_CRC_LEN; | |
1591 | } | |
1592 | ||
1593 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1594 | ||
1595 | iscsit_unmap_iovec(cmd); | |
1596 | ||
1597 | if (rx_got != rx_size) | |
1598 | return -1; | |
1599 | ||
1600 | if (conn->conn_ops->DataDigest) { | |
1601 | u32 data_crc; | |
1602 | ||
69110e3c | 1603 | data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd, |
50e5c87d CH |
1604 | be32_to_cpu(hdr->offset), |
1605 | payload_length, padding, | |
e48354ce NB |
1606 | cmd->pad_bytes); |
1607 | ||
1608 | if (checksum != data_crc) { | |
1609 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1610 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1611 | " does not match computed 0x%08x\n", | |
1612 | hdr->itt, hdr->offset, payload_length, | |
1613 | hdr->datasn, checksum, data_crc); | |
1614 | data_crc_failed = 1; | |
1615 | } else { | |
1616 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1617 | " %u bytes of Data Out\n", checksum, | |
1618 | payload_length); | |
1619 | } | |
1620 | } | |
3e1c81a9 NB |
1621 | |
1622 | return data_crc_failed; | |
1623 | } | |
1624 | ||
1625 | int | |
1626 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1627 | bool data_crc_failed) | |
1628 | { | |
1629 | struct iscsi_conn *conn = cmd->conn; | |
1630 | int rc, ooo_cmdsn; | |
e48354ce NB |
1631 | /* |
1632 | * Increment post receive data and CRC values or perform | |
1633 | * within-command recovery. | |
1634 | */ | |
3e1c81a9 NB |
1635 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1636 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1637 | return 0; |
3e1c81a9 | 1638 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1639 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1640 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1641 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1642 | /* |
1643 | * Handle extra special case for out of order | |
1644 | * Unsolicited Data Out. | |
1645 | */ | |
1646 | spin_lock_bh(&cmd->istate_lock); | |
1647 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1648 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1649 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1650 | spin_unlock_bh(&cmd->istate_lock); | |
1651 | ||
1652 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1653 | if (ooo_cmdsn) |
1654 | return 0; | |
1655 | target_execute_cmd(&cmd->se_cmd); | |
1656 | return 0; | |
e48354ce NB |
1657 | } else /* DATAOUT_CANNOT_RECOVER */ |
1658 | return -1; | |
1659 | ||
1660 | return 0; | |
1661 | } | |
3e1c81a9 | 1662 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1663 | |
3e1c81a9 NB |
1664 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1665 | { | |
dbcbc95c | 1666 | struct iscsi_cmd *cmd = NULL; |
3e1c81a9 NB |
1667 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1668 | int rc; | |
1669 | bool data_crc_failed = false; | |
1670 | ||
1671 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1672 | if (rc < 0) | |
561bf158 | 1673 | return 0; |
3e1c81a9 NB |
1674 | else if (!cmd) |
1675 | return 0; | |
1676 | ||
1677 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1678 | if (rc < 0) | |
1679 | return rc; | |
1680 | else if (rc > 0) | |
1681 | data_crc_failed = true; | |
1682 | ||
1683 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1684 | } | |
1685 | ||
778de368 NB |
1686 | int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
1687 | struct iscsi_nopout *hdr) | |
e48354ce | 1688 | { |
778de368 | 1689 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1690 | |
a3662605 AH |
1691 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { |
1692 | pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n"); | |
1693 | if (!cmd) | |
1694 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1695 | (unsigned char *)hdr); | |
1696 | ||
1697 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, | |
1698 | (unsigned char *)hdr); | |
1699 | } | |
1700 | ||
66c7db68 | 1701 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1702 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1703 | " not set, protocol error.\n"); | |
28aaa950 NB |
1704 | if (!cmd) |
1705 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1706 | (unsigned char *)hdr); | |
1707 | ||
ba159914 NB |
1708 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1709 | (unsigned char *)hdr); | |
e48354ce NB |
1710 | } |
1711 | ||
21f5aa7e | 1712 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1713 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1714 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1715 | " error.\n", payload_length, |
21f5aa7e | 1716 | conn->conn_ops->MaxXmitDataSegmentLength); |
28aaa950 NB |
1717 | if (!cmd) |
1718 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1719 | (unsigned char *)hdr); | |
1720 | ||
ba159914 NB |
1721 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1722 | (unsigned char *)hdr); | |
e48354ce NB |
1723 | } |
1724 | ||
3e1c81a9 | 1725 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1726 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1727 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1728 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1729 | payload_length); | |
1730 | /* | |
1731 | * This is not a response to a Unsolicited NopIN, which means | |
1732 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1733 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1734 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1735 | * can contain ping data. | |
1736 | */ | |
50e5c87d | 1737 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1738 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; |
1739 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1740 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1741 | 1 : 0); | |
1742 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1743 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1744 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1745 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1746 | cmd->data_direction = DMA_NONE; |
1747 | } | |
1748 | ||
778de368 NB |
1749 | return 0; |
1750 | } | |
1751 | EXPORT_SYMBOL(iscsit_setup_nop_out); | |
1752 | ||
1753 | int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1754 | struct iscsi_nopout *hdr) | |
1755 | { | |
1756 | struct iscsi_cmd *cmd_p = NULL; | |
1757 | int cmdsn_ret = 0; | |
1758 | /* | |
1759 | * Initiator is expecting a NopIN ping reply.. | |
1760 | */ | |
1761 | if (hdr->itt != RESERVED_ITT) { | |
7cbfcc95 NB |
1762 | if (!cmd) |
1763 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1764 | (unsigned char *)hdr); | |
778de368 NB |
1765 | |
1766 | spin_lock_bh(&conn->cmd_lock); | |
1767 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
1768 | spin_unlock_bh(&conn->cmd_lock); | |
1769 | ||
1770 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
1771 | ||
1772 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1773 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1774 | cmd->i_state); | |
1775 | return 0; | |
1776 | } | |
1777 | ||
561bf158 NB |
1778 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1779 | (unsigned char *)hdr, hdr->cmdsn); | |
778de368 NB |
1780 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1781 | return 0; | |
778de368 | 1782 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1783 | return -1; |
778de368 NB |
1784 | |
1785 | return 0; | |
1786 | } | |
1787 | /* | |
1788 | * This was a response to a unsolicited NOPIN ping. | |
1789 | */ | |
1790 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { | |
1791 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); | |
1792 | if (!cmd_p) | |
1793 | return -EINVAL; | |
1794 | ||
1795 | iscsit_stop_nopin_response_timer(conn); | |
1796 | ||
1797 | cmd_p->i_state = ISTATE_REMOVE; | |
1798 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
1799 | ||
1800 | iscsit_start_nopin_timer(conn); | |
1801 | return 0; | |
1802 | } | |
1803 | /* | |
1804 | * Otherwise, initiator is not expecting a NOPIN is response. | |
1805 | * Just ignore for now. | |
1806 | */ | |
1807 | return 0; | |
1808 | } | |
1809 | EXPORT_SYMBOL(iscsit_process_nop_out); | |
1810 | ||
1811 | static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1812 | unsigned char *buf) | |
1813 | { | |
1814 | unsigned char *ping_data = NULL; | |
1815 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1816 | struct kvec *iov = NULL; | |
1817 | u32 payload_length = ntoh24(hdr->dlength); | |
1818 | int ret; | |
1819 | ||
1820 | ret = iscsit_setup_nop_out(conn, cmd, hdr); | |
1821 | if (ret < 0) | |
561bf158 | 1822 | return 0; |
778de368 NB |
1823 | /* |
1824 | * Handle NOP-OUT payload for traditional iSCSI sockets | |
1825 | */ | |
50e5c87d | 1826 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
778de368 NB |
1827 | u32 checksum, data_crc, padding = 0; |
1828 | int niov = 0, rx_got, rx_size = payload_length; | |
1829 | ||
e48354ce NB |
1830 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); |
1831 | if (!ping_data) { | |
1832 | pr_err("Unable to allocate memory for" | |
1833 | " NOPOUT ping data.\n"); | |
1834 | ret = -1; | |
1835 | goto out; | |
1836 | } | |
1837 | ||
1838 | iov = &cmd->iov_misc[0]; | |
1839 | iov[niov].iov_base = ping_data; | |
1840 | iov[niov++].iov_len = payload_length; | |
1841 | ||
1842 | padding = ((-payload_length) & 3); | |
1843 | if (padding != 0) { | |
1844 | pr_debug("Receiving %u additional bytes" | |
1845 | " for padding.\n", padding); | |
1846 | iov[niov].iov_base = &cmd->pad_bytes; | |
1847 | iov[niov++].iov_len = padding; | |
1848 | rx_size += padding; | |
1849 | } | |
1850 | if (conn->conn_ops->DataDigest) { | |
1851 | iov[niov].iov_base = &checksum; | |
1852 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1853 | rx_size += ISCSI_CRC_LEN; | |
1854 | } | |
1855 | ||
1856 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1857 | if (rx_got != rx_size) { | |
1858 | ret = -1; | |
1859 | goto out; | |
1860 | } | |
1861 | ||
1862 | if (conn->conn_ops->DataDigest) { | |
69110e3c | 1863 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
e48354ce NB |
1864 | ping_data, payload_length, |
1865 | padding, cmd->pad_bytes, | |
1866 | (u8 *)&data_crc); | |
1867 | ||
1868 | if (checksum != data_crc) { | |
1869 | pr_err("Ping data CRC32C DataDigest" | |
1870 | " 0x%08x does not match computed 0x%08x\n", | |
1871 | checksum, data_crc); | |
1872 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1873 | pr_err("Unable to recover from" | |
1874 | " NOPOUT Ping DataCRC failure while in" | |
1875 | " ERL=0.\n"); | |
1876 | ret = -1; | |
1877 | goto out; | |
1878 | } else { | |
1879 | /* | |
1880 | * Silently drop this PDU and let the | |
1881 | * initiator plug the CmdSN gap. | |
1882 | */ | |
1883 | pr_debug("Dropping NOPOUT" | |
1884 | " Command CmdSN: 0x%08x due to" | |
1885 | " DataCRC error.\n", hdr->cmdsn); | |
1886 | ret = 0; | |
1887 | goto out; | |
1888 | } | |
1889 | } else { | |
1890 | pr_debug("Got CRC32C DataDigest" | |
1891 | " 0x%08x for %u bytes of ping data.\n", | |
1892 | checksum, payload_length); | |
1893 | } | |
1894 | } | |
1895 | ||
1896 | ping_data[payload_length] = '\0'; | |
1897 | /* | |
1898 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1899 | */ | |
8359cf43 | 1900 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1901 | cmd->buf_ptr_size = payload_length; |
1902 | ||
1903 | pr_debug("Got %u bytes of NOPOUT ping" | |
1904 | " data.\n", payload_length); | |
1905 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1906 | } | |
1907 | ||
778de368 | 1908 | return iscsit_process_nop_out(conn, cmd, hdr); |
e48354ce NB |
1909 | out: |
1910 | if (cmd) | |
aafc9d15 | 1911 | iscsit_free_cmd(cmd, false); |
778de368 | 1912 | |
e48354ce NB |
1913 | kfree(ping_data); |
1914 | return ret; | |
1915 | } | |
1916 | ||
3e1c81a9 NB |
1917 | int |
1918 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1919 | unsigned char *buf) | |
e48354ce | 1920 | { |
e48354ce NB |
1921 | struct se_tmr_req *se_tmr; |
1922 | struct iscsi_tmr_req *tmr_req; | |
1923 | struct iscsi_tm *hdr; | |
186a9647 NB |
1924 | int out_of_order_cmdsn = 0, ret; |
1925 | bool sess_ref = false; | |
e48354ce NB |
1926 | u8 function; |
1927 | ||
1928 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1929 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1930 | function = hdr->flags; | |
1931 | ||
1932 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1933 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1934 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1935 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1936 | ||
1937 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1938 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1939 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1940 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1941 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1942 | } |
1943 | ||
1944 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1945 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1946 | pr_err("Task Management Request TASK_REASSIGN not" | |
1947 | " issued as immediate command, bad iSCSI Initiator" | |
1948 | "implementation\n"); | |
ba159914 NB |
1949 | return iscsit_add_reject_cmd(cmd, |
1950 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1951 | } |
1952 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1953 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1954 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1955 | |
d28b1169 AG |
1956 | cmd->data_direction = DMA_NONE; |
1957 | ||
1958 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1959 | if (!cmd->tmr_req) { | |
1960 | pr_err("Unable to allocate memory for" | |
1961 | " Task Management command!\n"); | |
ba159914 NB |
1962 | return iscsit_add_reject_cmd(cmd, |
1963 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1964 | buf); | |
d28b1169 AG |
1965 | } |
1966 | ||
1967 | /* | |
1968 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1969 | * LIO-Target $FABRIC_MOD | |
1970 | */ | |
1971 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1972 | ||
1973 | u8 tcm_function; | |
1974 | int ret; | |
1975 | ||
9ac8928e | 1976 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
d28b1169 | 1977 | conn->sess->se_sess, 0, DMA_NONE, |
68d81f40 | 1978 | TCM_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 | 1979 | |
afc16604 | 1980 | target_get_sess_cmd(&cmd->se_cmd, true); |
186a9647 NB |
1981 | sess_ref = true; |
1982 | ||
d28b1169 AG |
1983 | switch (function) { |
1984 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1985 | tcm_function = TMR_ABORT_TASK; | |
1986 | break; | |
1987 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1988 | tcm_function = TMR_ABORT_TASK_SET; | |
1989 | break; | |
1990 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1991 | tcm_function = TMR_CLEAR_ACA; | |
1992 | break; | |
1993 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1994 | tcm_function = TMR_CLEAR_TASK_SET; | |
1995 | break; | |
1996 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1997 | tcm_function = TMR_LUN_RESET; | |
1998 | break; | |
1999 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
2000 | tcm_function = TMR_TARGET_WARM_RESET; | |
2001 | break; | |
2002 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
2003 | tcm_function = TMR_TARGET_COLD_RESET; | |
2004 | break; | |
2005 | default: | |
2006 | pr_err("Unknown iSCSI TMR Function:" | |
2007 | " 0x%02x\n", function); | |
ba159914 NB |
2008 | return iscsit_add_reject_cmd(cmd, |
2009 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
2010 | } |
2011 | ||
2012 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
2013 | tcm_function, GFP_KERNEL); | |
2014 | if (ret < 0) | |
ba159914 NB |
2015 | return iscsit_add_reject_cmd(cmd, |
2016 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
2017 | |
2018 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
2019 | } | |
e48354ce NB |
2020 | |
2021 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
2022 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
2023 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2024 | cmd->init_task_tag = hdr->itt; | |
2025 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2026 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2027 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
2028 | se_tmr = cmd->se_cmd.se_tmr_req; |
2029 | tmr_req = cmd->tmr_req; | |
2030 | /* | |
2031 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
2032 | */ | |
2033 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
2034 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
2035 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 2036 | if (ret < 0) { |
e48354ce NB |
2037 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
2038 | goto attach; | |
2039 | } | |
2040 | } | |
2041 | ||
2042 | switch (function) { | |
2043 | case ISCSI_TM_FUNC_ABORT_TASK: | |
2044 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 2045 | if (se_tmr->response) |
e48354ce | 2046 | goto attach; |
e48354ce NB |
2047 | break; |
2048 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
2049 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
2050 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
2051 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
2052 | break; | |
2053 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
2054 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
2055 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
2056 | goto attach; | |
2057 | } | |
2058 | break; | |
2059 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
2060 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
2061 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
2062 | goto attach; | |
2063 | } | |
2064 | break; | |
2065 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
2066 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
2067 | /* | |
2068 | * Perform sanity checks on the ExpDataSN only if the | |
2069 | * TASK_REASSIGN was successful. | |
2070 | */ | |
de103c93 | 2071 | if (se_tmr->response) |
e48354ce NB |
2072 | break; |
2073 | ||
2074 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
ba159914 NB |
2075 | return iscsit_add_reject_cmd(cmd, |
2076 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
2077 | break; |
2078 | default: | |
2079 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
2080 | " error.\n", function); | |
e48354ce NB |
2081 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
2082 | goto attach; | |
2083 | } | |
2084 | ||
2085 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
2086 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
2087 | se_tmr->call_transport = 1; | |
2088 | attach: | |
2089 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2090 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2091 | spin_unlock_bh(&conn->cmd_lock); |
2092 | ||
2093 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 | 2094 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
e48354ce NB |
2095 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) |
2096 | out_of_order_cmdsn = 1; | |
5a4c8666 | 2097 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2098 | return 0; |
5a4c8666 | 2099 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 2100 | return -1; |
e48354ce | 2101 | } |
50e5c87d | 2102 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 2103 | |
5a4c8666 | 2104 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
2105 | return 0; |
2106 | /* | |
2107 | * Found the referenced task, send to transport for processing. | |
2108 | */ | |
2109 | if (se_tmr->call_transport) | |
2110 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
2111 | ||
2112 | /* | |
2113 | * Could not find the referenced LUN, task, or Task Management | |
2114 | * command not authorized or supported. Change state and | |
2115 | * let the tx_thread send the response. | |
2116 | * | |
2117 | * For connection recovery, this is also the default action for | |
2118 | * TMR TASK_REASSIGN. | |
2119 | */ | |
186a9647 NB |
2120 | if (sess_ref) { |
2121 | pr_debug("Handle TMR, using sess_ref=true check\n"); | |
afc16604 | 2122 | target_put_sess_cmd(&cmd->se_cmd); |
186a9647 NB |
2123 | } |
2124 | ||
e48354ce NB |
2125 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); |
2126 | return 0; | |
2127 | } | |
3e1c81a9 | 2128 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
2129 | |
2130 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
64534aa7 NB |
2131 | int |
2132 | iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2133 | struct iscsi_text *hdr) | |
e48354ce | 2134 | { |
64534aa7 | 2135 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 2136 | |
21f5aa7e | 2137 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 2138 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
2139 | "greater than MaxXmitDataSegmentLength %u.\n", |
2140 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
2141 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2142 | (unsigned char *)hdr); | |
e48354ce NB |
2143 | } |
2144 | ||
122f8afc NB |
2145 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || |
2146 | (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { | |
2147 | pr_err("Multi sequence text commands currently not supported\n"); | |
2148 | return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, | |
2149 | (unsigned char *)hdr); | |
2150 | } | |
2151 | ||
e48354ce NB |
2152 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," |
2153 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
2154 | hdr->exp_statsn, payload_length); | |
2155 | ||
64534aa7 NB |
2156 | cmd->iscsi_opcode = ISCSI_OP_TEXT; |
2157 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
2158 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2159 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2160 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
2161 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); | |
2162 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2163 | cmd->data_direction = DMA_NONE; | |
e4f4e801 | 2164 | cmd->text_in_ptr = NULL; |
64534aa7 NB |
2165 | |
2166 | return 0; | |
2167 | } | |
2168 | EXPORT_SYMBOL(iscsit_setup_text_cmd); | |
2169 | ||
2170 | int | |
2171 | iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2172 | struct iscsi_text *hdr) | |
2173 | { | |
9864ca9d | 2174 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr; |
64534aa7 NB |
2175 | int cmdsn_ret; |
2176 | ||
9864ca9d | 2177 | if (!text_in) { |
e4f4e801 SG |
2178 | cmd->targ_xfer_tag = be32_to_cpu(hdr->ttt); |
2179 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) { | |
2180 | pr_err("Unable to locate text_in buffer for sendtargets" | |
2181 | " discovery\n"); | |
2182 | goto reject; | |
2183 | } | |
2184 | goto empty_sendtargets; | |
9864ca9d NB |
2185 | } |
2186 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
2187 | pr_err("Received Text Data that is not" | |
2188 | " SendTargets, cannot continue.\n"); | |
2189 | goto reject; | |
2190 | } | |
2191 | text_ptr = strchr(text_in, '='); | |
2192 | if (!text_ptr) { | |
2193 | pr_err("No \"=\" separator found in Text Data," | |
2194 | " cannot continue.\n"); | |
2195 | goto reject; | |
2196 | } | |
2197 | if (!strncmp("=All", text_ptr, 4)) { | |
8060b8dd | 2198 | cmd->cmd_flags |= ICF_SENDTARGETS_ALL; |
6665889c NB |
2199 | } else if (!strncmp("=iqn.", text_ptr, 5) || |
2200 | !strncmp("=eui.", text_ptr, 5)) { | |
8060b8dd | 2201 | cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE; |
9864ca9d NB |
2202 | } else { |
2203 | pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); | |
2204 | goto reject; | |
2205 | } | |
2206 | ||
64534aa7 NB |
2207 | spin_lock_bh(&conn->cmd_lock); |
2208 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
2209 | spin_unlock_bh(&conn->cmd_lock); | |
2210 | ||
e4f4e801 | 2211 | empty_sendtargets: |
64534aa7 NB |
2212 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
2213 | ||
2214 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 NB |
2215 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
2216 | (unsigned char *)hdr, hdr->cmdsn); | |
64534aa7 | 2217 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 NB |
2218 | return -1; |
2219 | ||
64534aa7 NB |
2220 | return 0; |
2221 | } | |
2222 | ||
2223 | return iscsit_execute_cmd(cmd, 0); | |
9864ca9d NB |
2224 | |
2225 | reject: | |
ba159914 NB |
2226 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2227 | (unsigned char *)hdr); | |
64534aa7 NB |
2228 | } |
2229 | EXPORT_SYMBOL(iscsit_process_text_cmd); | |
2230 | ||
2231 | static int | |
2232 | iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2233 | unsigned char *buf) | |
2234 | { | |
2235 | struct iscsi_text *hdr = (struct iscsi_text *)buf; | |
2236 | char *text_in = NULL; | |
2237 | u32 payload_length = ntoh24(hdr->dlength); | |
2238 | int rx_size, rc; | |
2239 | ||
2240 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
2241 | if (rc < 0) | |
561bf158 | 2242 | return 0; |
64534aa7 NB |
2243 | |
2244 | rx_size = payload_length; | |
2245 | if (payload_length) { | |
64534aa7 NB |
2246 | u32 checksum = 0, data_crc = 0; |
2247 | u32 padding = 0, pad_bytes = 0; | |
2248 | int niov = 0, rx_got; | |
2249 | struct kvec iov[3]; | |
2250 | ||
2251 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
e48354ce NB |
2252 | if (!text_in) { |
2253 | pr_err("Unable to allocate memory for" | |
2254 | " incoming text parameters\n"); | |
64534aa7 | 2255 | goto reject; |
e48354ce | 2256 | } |
9864ca9d | 2257 | cmd->text_in_ptr = text_in; |
e48354ce NB |
2258 | |
2259 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
2260 | iov[niov].iov_base = text_in; | |
64534aa7 | 2261 | iov[niov++].iov_len = payload_length; |
e48354ce NB |
2262 | |
2263 | padding = ((-payload_length) & 3); | |
2264 | if (padding != 0) { | |
76f1928e | 2265 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
2266 | iov[niov++].iov_len = padding; |
2267 | rx_size += padding; | |
2268 | pr_debug("Receiving %u additional bytes" | |
2269 | " for padding.\n", padding); | |
2270 | } | |
2271 | if (conn->conn_ops->DataDigest) { | |
2272 | iov[niov].iov_base = &checksum; | |
2273 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2274 | rx_size += ISCSI_CRC_LEN; | |
2275 | } | |
2276 | ||
2277 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
64534aa7 NB |
2278 | if (rx_got != rx_size) |
2279 | goto reject; | |
e48354ce NB |
2280 | |
2281 | if (conn->conn_ops->DataDigest) { | |
69110e3c | 2282 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
64534aa7 | 2283 | text_in, payload_length, |
76f1928e | 2284 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
2285 | (u8 *)&data_crc); |
2286 | ||
2287 | if (checksum != data_crc) { | |
2288 | pr_err("Text data CRC32C DataDigest" | |
2289 | " 0x%08x does not match computed" | |
2290 | " 0x%08x\n", checksum, data_crc); | |
2291 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2292 | pr_err("Unable to recover from" | |
2293 | " Text Data digest failure while in" | |
2294 | " ERL=0.\n"); | |
64534aa7 | 2295 | goto reject; |
e48354ce NB |
2296 | } else { |
2297 | /* | |
2298 | * Silently drop this PDU and let the | |
2299 | * initiator plug the CmdSN gap. | |
2300 | */ | |
2301 | pr_debug("Dropping Text" | |
2302 | " Command CmdSN: 0x%08x due to" | |
2303 | " DataCRC error.\n", hdr->cmdsn); | |
2304 | kfree(text_in); | |
2305 | return 0; | |
2306 | } | |
2307 | } else { | |
2308 | pr_debug("Got CRC32C DataDigest" | |
2309 | " 0x%08x for %u bytes of text data.\n", | |
64534aa7 | 2310 | checksum, payload_length); |
e48354ce NB |
2311 | } |
2312 | } | |
64534aa7 | 2313 | text_in[payload_length - 1] = '\0'; |
e48354ce | 2314 | pr_debug("Successfully read %d bytes of text" |
64534aa7 | 2315 | " data.\n", payload_length); |
e48354ce NB |
2316 | } |
2317 | ||
64534aa7 | 2318 | return iscsit_process_text_cmd(conn, cmd, hdr); |
e48354ce | 2319 | |
64534aa7 | 2320 | reject: |
9864ca9d NB |
2321 | kfree(cmd->text_in_ptr); |
2322 | cmd->text_in_ptr = NULL; | |
ba159914 | 2323 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce NB |
2324 | } |
2325 | ||
2326 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2327 | { | |
2328 | struct iscsi_conn *conn_p; | |
2329 | struct iscsi_session *sess = conn->sess; | |
2330 | ||
2331 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2332 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2333 | ||
2334 | atomic_set(&sess->session_logout, 1); | |
2335 | atomic_set(&conn->conn_logout_remove, 1); | |
2336 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2337 | ||
2338 | iscsit_inc_conn_usage_count(conn); | |
2339 | iscsit_inc_session_usage_count(sess); | |
2340 | ||
2341 | spin_lock_bh(&sess->conn_lock); | |
2342 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2343 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2344 | continue; | |
2345 | ||
2346 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2347 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2348 | } | |
2349 | spin_unlock_bh(&sess->conn_lock); | |
2350 | ||
2351 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2352 | ||
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2357 | { | |
2358 | struct iscsi_conn *l_conn; | |
2359 | struct iscsi_session *sess = conn->sess; | |
2360 | ||
2361 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2362 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2363 | ||
2364 | /* | |
2365 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2366 | * can arrive on a connection with a differing CID. | |
2367 | */ | |
2368 | if (conn->cid == cmd->logout_cid) { | |
2369 | spin_lock_bh(&conn->state_lock); | |
2370 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2371 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2372 | ||
2373 | atomic_set(&conn->conn_logout_remove, 1); | |
2374 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2375 | iscsit_inc_conn_usage_count(conn); | |
2376 | ||
2377 | spin_unlock_bh(&conn->state_lock); | |
2378 | } else { | |
2379 | /* | |
2380 | * Handle all different cid CLOSECONNECTION requests in | |
2381 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2382 | * time for any non immediate command's CmdSN to be | |
2383 | * acknowledged on the connection in question. | |
2384 | * | |
2385 | * Here we simply make sure the CID is still around. | |
2386 | */ | |
2387 | l_conn = iscsit_get_conn_from_cid(sess, | |
2388 | cmd->logout_cid); | |
2389 | if (!l_conn) { | |
2390 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2391 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2392 | cmd->i_state); | |
2393 | return 0; | |
2394 | } | |
2395 | ||
2396 | iscsit_dec_conn_usage_count(l_conn); | |
2397 | } | |
2398 | ||
2399 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2400 | ||
2401 | return 0; | |
2402 | } | |
2403 | ||
2404 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2405 | { | |
2406 | struct iscsi_session *sess = conn->sess; | |
2407 | ||
2408 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2409 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2410 | ||
2411 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2412 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2413 | " while ERL!=2.\n"); | |
2414 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2415 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2416 | return 0; | |
2417 | } | |
2418 | ||
2419 | if (conn->cid == cmd->logout_cid) { | |
2420 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2421 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2422 | cmd->logout_cid, conn->cid); | |
2423 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2424 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2425 | return 0; | |
2426 | } | |
2427 | ||
2428 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2429 | ||
2430 | return 0; | |
2431 | } | |
2432 | ||
3e1c81a9 NB |
2433 | int |
2434 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2435 | unsigned char *buf) | |
e48354ce NB |
2436 | { |
2437 | int cmdsn_ret, logout_remove = 0; | |
2438 | u8 reason_code = 0; | |
e48354ce NB |
2439 | struct iscsi_logout *hdr; |
2440 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2441 | ||
2442 | hdr = (struct iscsi_logout *) buf; | |
2443 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2444 | |
2445 | if (tiqn) { | |
2446 | spin_lock(&tiqn->logout_stats.lock); | |
2447 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2448 | tiqn->logout_stats.normal_logouts++; | |
2449 | else | |
2450 | tiqn->logout_stats.abnormal_logouts++; | |
2451 | spin_unlock(&tiqn->logout_stats.lock); | |
2452 | } | |
2453 | ||
2454 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2455 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2456 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2457 | hdr->cid, conn->cid); | |
2458 | ||
2459 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2460 | pr_err("Received logout request on connection that" | |
2461 | " is not in logged in state, ignoring request.\n"); | |
aafc9d15 | 2462 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
2463 | return 0; |
2464 | } | |
2465 | ||
e48354ce NB |
2466 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2467 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2468 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2469 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2470 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2471 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2472 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2473 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2474 | cmd->logout_reason = reason_code; |
2475 | cmd->data_direction = DMA_NONE; | |
2476 | ||
2477 | /* | |
2478 | * We need to sleep in these cases (by returning 1) until the Logout | |
2479 | * Response gets sent in the tx thread. | |
2480 | */ | |
2481 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2482 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2483 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2484 | logout_remove = 1; |
2485 | ||
2486 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2487 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2488 | spin_unlock_bh(&conn->cmd_lock); |
2489 | ||
2490 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2491 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2492 | |
2493 | /* | |
2494 | * Immediate commands are executed, well, immediately. | |
2495 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2496 | */ | |
c6037cc5 | 2497 | if (cmd->immediate_cmd) { |
e48354ce NB |
2498 | int ret = iscsit_execute_cmd(cmd, 0); |
2499 | ||
2500 | if (ret < 0) | |
2501 | return ret; | |
2502 | } else { | |
561bf158 | 2503 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
ba159914 | 2504 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2505 | logout_remove = 0; |
ba159914 NB |
2506 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
2507 | return -1; | |
e48354ce NB |
2508 | } |
2509 | ||
2510 | return logout_remove; | |
2511 | } | |
3e1c81a9 | 2512 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce | 2513 | |
d2faaefb | 2514 | int iscsit_handle_snack( |
e48354ce NB |
2515 | struct iscsi_conn *conn, |
2516 | unsigned char *buf) | |
2517 | { | |
e48354ce NB |
2518 | struct iscsi_snack *hdr; |
2519 | ||
2520 | hdr = (struct iscsi_snack *) buf; | |
2521 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2522 | |
2523 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2524 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2525 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2526 | hdr->begrun, hdr->runlength, conn->cid); | |
2527 | ||
2528 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2529 | pr_err("Initiator sent SNACK request while in" | |
2530 | " ErrorRecoveryLevel=0.\n"); | |
ba159914 NB |
2531 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2532 | buf); | |
e48354ce NB |
2533 | } |
2534 | /* | |
2535 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2536 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2537 | */ | |
2538 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2539 | case 0: | |
2540 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2541 | hdr->itt, |
2542 | be32_to_cpu(hdr->ttt), | |
2543 | be32_to_cpu(hdr->begrun), | |
2544 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2545 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2546 | return iscsit_handle_status_snack(conn, hdr->itt, |
2547 | be32_to_cpu(hdr->ttt), | |
2548 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2549 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2550 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2551 | be32_to_cpu(hdr->begrun), | |
2552 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2553 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2554 | /* FIXME: Support R-Data SNACK */ | |
2555 | pr_err("R-Data SNACK Not Supported.\n"); | |
ba159914 NB |
2556 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2557 | buf); | |
e48354ce NB |
2558 | default: |
2559 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2560 | " error.\n", hdr->flags & 0x0f); | |
ba159914 NB |
2561 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2562 | buf); | |
e48354ce NB |
2563 | } |
2564 | ||
2565 | return 0; | |
2566 | } | |
d2faaefb | 2567 | EXPORT_SYMBOL(iscsit_handle_snack); |
e48354ce NB |
2568 | |
2569 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2570 | { | |
2571 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2572 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2573 | wait_for_completion_interruptible_timeout( | |
2574 | &conn->rx_half_close_comp, | |
2575 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | static int iscsit_handle_immediate_data( | |
2580 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2581 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2582 | u32 length) |
2583 | { | |
2584 | int iov_ret, rx_got = 0, rx_size = 0; | |
2585 | u32 checksum, iov_count = 0, padding = 0; | |
2586 | struct iscsi_conn *conn = cmd->conn; | |
2587 | struct kvec *iov; | |
2588 | ||
2589 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2590 | if (iov_ret < 0) | |
2591 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2592 | ||
2593 | rx_size = length; | |
2594 | iov_count = iov_ret; | |
2595 | iov = &cmd->iov_data[0]; | |
2596 | ||
2597 | padding = ((-length) & 3); | |
2598 | if (padding != 0) { | |
2599 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2600 | iov[iov_count++].iov_len = padding; | |
2601 | rx_size += padding; | |
2602 | } | |
2603 | ||
2604 | if (conn->conn_ops->DataDigest) { | |
2605 | iov[iov_count].iov_base = &checksum; | |
2606 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2607 | rx_size += ISCSI_CRC_LEN; | |
2608 | } | |
2609 | ||
2610 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2611 | ||
2612 | iscsit_unmap_iovec(cmd); | |
2613 | ||
2614 | if (rx_got != rx_size) { | |
2615 | iscsit_rx_thread_wait_for_tcp(conn); | |
2616 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2617 | } | |
2618 | ||
2619 | if (conn->conn_ops->DataDigest) { | |
2620 | u32 data_crc; | |
2621 | ||
69110e3c | 2622 | data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd, |
e48354ce NB |
2623 | cmd->write_data_done, length, padding, |
2624 | cmd->pad_bytes); | |
2625 | ||
2626 | if (checksum != data_crc) { | |
2627 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2628 | " does not match computed 0x%08x\n", checksum, | |
2629 | data_crc); | |
2630 | ||
2631 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2632 | pr_err("Unable to recover from" | |
2633 | " Immediate Data digest failure while" | |
2634 | " in ERL=0.\n"); | |
ba159914 | 2635 | iscsit_reject_cmd(cmd, |
e48354ce | 2636 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2637 | (unsigned char *)hdr); |
e48354ce NB |
2638 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2639 | } else { | |
ba159914 | 2640 | iscsit_reject_cmd(cmd, |
e48354ce | 2641 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2642 | (unsigned char *)hdr); |
e48354ce NB |
2643 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2644 | } | |
2645 | } else { | |
2646 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2647 | " %u bytes of Immediate Data\n", checksum, | |
2648 | length); | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | cmd->write_data_done += length; | |
2653 | ||
ebf1d95c | 2654 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2655 | spin_lock_bh(&cmd->istate_lock); |
2656 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2657 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2658 | spin_unlock_bh(&cmd->istate_lock); | |
2659 | } | |
2660 | ||
2661 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2662 | } | |
2663 | ||
2664 | /* | |
2665 | * Called with sess->conn_lock held. | |
2666 | */ | |
2667 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2668 | with active network interface */ | |
2669 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2670 | { | |
2671 | struct iscsi_cmd *cmd; | |
2672 | struct iscsi_conn *conn_p; | |
d444edc6 | 2673 | bool found = false; |
e48354ce NB |
2674 | |
2675 | /* | |
2676 | * Only send a Asynchronous Message on connections whos network | |
2677 | * interface is still functional. | |
2678 | */ | |
2679 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2680 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2681 | iscsit_inc_conn_usage_count(conn_p); | |
d444edc6 | 2682 | found = true; |
e48354ce NB |
2683 | break; |
2684 | } | |
2685 | } | |
2686 | ||
d444edc6 | 2687 | if (!found) |
e48354ce NB |
2688 | return; |
2689 | ||
676687c6 | 2690 | cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING); |
e48354ce NB |
2691 | if (!cmd) { |
2692 | iscsit_dec_conn_usage_count(conn_p); | |
2693 | return; | |
2694 | } | |
2695 | ||
2696 | cmd->logout_cid = conn->cid; | |
2697 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2698 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2699 | ||
2700 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2701 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2702 | spin_unlock_bh(&conn_p->cmd_lock); |
2703 | ||
2704 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2705 | iscsit_dec_conn_usage_count(conn_p); | |
2706 | } | |
2707 | ||
2708 | static int iscsit_send_conn_drop_async_message( | |
2709 | struct iscsi_cmd *cmd, | |
2710 | struct iscsi_conn *conn) | |
2711 | { | |
2712 | struct iscsi_async *hdr; | |
2713 | ||
e48354ce NB |
2714 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; |
2715 | ||
2716 | hdr = (struct iscsi_async *) cmd->pdu; | |
2717 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2718 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2719 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2720 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2721 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2722 | cmd->stat_sn = conn->stat_sn++; | |
2723 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2724 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2725 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce NB |
2726 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; |
2727 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2728 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2729 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2730 | ||
e48354ce NB |
2731 | pr_debug("Sending Connection Dropped Async Message StatSN:" |
2732 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2733 | cmd->logout_cid, conn->cid); | |
2854bb23 VP |
2734 | |
2735 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); | |
e48354ce NB |
2736 | } |
2737 | ||
6f3c0e69 AG |
2738 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2739 | { | |
2740 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2741 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2742 | wait_for_completion_interruptible_timeout( | |
2743 | &conn->tx_half_close_comp, | |
2744 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2745 | } | |
2746 | } | |
2747 | ||
d2faaefb | 2748 | void |
2ec5a8c1 NB |
2749 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
2750 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2751 | bool set_statsn) | |
e48354ce | 2752 | { |
2ec5a8c1 NB |
2753 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2754 | hdr->flags = datain->flags; | |
2755 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2756 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2757 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2758 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2759 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2760 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2761 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2762 | } | |
2763 | } | |
2764 | hton24(hdr->dlength, datain->length); | |
2765 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2766 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2767 | (struct scsi_lun *)&hdr->lun); | |
2768 | else | |
2769 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2770 | ||
2771 | hdr->itt = cmd->init_task_tag; | |
2772 | ||
2773 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2774 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2775 | else | |
2776 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2777 | if (set_statsn) | |
2778 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2779 | else | |
2780 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2781 | ||
2782 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2783 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
2784 | hdr->datasn = cpu_to_be32(datain->data_sn); |
2785 | hdr->offset = cpu_to_be32(datain->offset); | |
2786 | ||
2787 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2788 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2789 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2790 | ntohl(hdr->offset), datain->length, conn->cid); | |
2791 | } | |
d2faaefb | 2792 | EXPORT_SYMBOL(iscsit_build_datain_pdu); |
2ec5a8c1 NB |
2793 | |
2794 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2795 | { | |
2796 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2797 | struct iscsi_datain datain; |
2798 | struct iscsi_datain_req *dr; | |
2854bb23 | 2799 | int eodr = 0, ret; |
2ec5a8c1 | 2800 | bool set_statsn = false; |
e48354ce NB |
2801 | |
2802 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2803 | dr = iscsit_get_datain_values(cmd, &datain); | |
2804 | if (!dr) { | |
2805 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2806 | cmd->init_task_tag); | |
2807 | return -1; | |
2808 | } | |
e48354ce NB |
2809 | /* |
2810 | * Be paranoid and double check the logic for now. | |
2811 | */ | |
ebf1d95c | 2812 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2813 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2814 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2815 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2816 | cmd->se_cmd.data_length); |
e48354ce NB |
2817 | return -1; |
2818 | } | |
2819 | ||
04f3b31b | 2820 | atomic_long_add(datain.length, &conn->sess->tx_data_octets); |
e48354ce NB |
2821 | /* |
2822 | * Special case for successfully execution w/ both DATAIN | |
2823 | * and Sense Data. | |
2824 | */ | |
2825 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2826 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2827 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2828 | else { | |
2829 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2830 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2831 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2832 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2833 | set_statsn = true; |
e48354ce | 2834 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2835 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2836 | set_statsn = true; | |
e48354ce NB |
2837 | } |
2838 | ||
2ec5a8c1 | 2839 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce | 2840 | |
2854bb23 VP |
2841 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, dr, &datain, 0); |
2842 | if (ret < 0) | |
6f3c0e69 | 2843 | return ret; |
6f3c0e69 | 2844 | |
e48354ce | 2845 | if (dr->dr_complete) { |
6f3c0e69 | 2846 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2847 | 2 : 1; |
2848 | iscsit_free_datain_req(cmd, dr); | |
2849 | } | |
2850 | ||
6f3c0e69 | 2851 | return eodr; |
e48354ce NB |
2852 | } |
2853 | ||
2ec5a8c1 NB |
2854 | int |
2855 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2856 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2857 | { |
e48354ce NB |
2858 | struct iscsi_conn *logout_conn = NULL; |
2859 | struct iscsi_conn_recovery *cr = NULL; | |
2860 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2861 | /* |
2862 | * The actual shutting down of Sessions and/or Connections | |
2863 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2864 | * is done in scsi_logout_post_handler(). | |
2865 | */ | |
2866 | switch (cmd->logout_reason) { | |
2867 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2868 | pr_debug("iSCSI session logout successful, setting" | |
2869 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2870 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2871 | break; | |
2872 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2873 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2874 | break; | |
2875 | /* | |
2876 | * For CLOSECONNECTION logout requests carrying | |
2877 | * a matching logout CID -> local CID, the reference | |
2878 | * for the local CID will have been incremented in | |
2879 | * iscsi_logout_closeconnection(). | |
2880 | * | |
2881 | * For CLOSECONNECTION logout requests carrying | |
2882 | * a different CID than the connection it arrived | |
2883 | * on, the connection responding to cmd->logout_cid | |
2884 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2885 | */ | |
2886 | ||
2887 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2888 | " successful.\n", cmd->logout_cid, conn->cid); | |
2889 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2890 | break; | |
2891 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2892 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2893 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2894 | break; | |
2895 | /* | |
2896 | * If the connection is still active from our point of view | |
2897 | * force connection recovery to occur. | |
2898 | */ | |
2899 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2900 | cmd->logout_cid); | |
ee1b1b9c | 2901 | if (logout_conn) { |
e48354ce NB |
2902 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2903 | iscsit_dec_conn_usage_count(logout_conn); | |
2904 | } | |
2905 | ||
2906 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2907 | conn->sess, cmd->logout_cid); | |
2908 | if (!cr) { | |
2909 | pr_err("Unable to locate CID: %hu for" | |
2910 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2911 | cmd->logout_cid); | |
2912 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2913 | break; | |
2914 | } | |
2915 | ||
2916 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2917 | ||
2918 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2919 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2920 | cmd->logout_cid, conn->cid); | |
2921 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2922 | break; | |
2923 | default: | |
2924 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2925 | cmd->logout_reason); | |
2926 | return -1; | |
2927 | } | |
2928 | ||
e48354ce NB |
2929 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2930 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2931 | hdr->response = cmd->logout_response; | |
66c7db68 | 2932 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2933 | cmd->stat_sn = conn->stat_sn++; |
2934 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2935 | ||
2936 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2937 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2938 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 2939 | |
2ec5a8c1 NB |
2940 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2941 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2942 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2943 | cmd->logout_cid, conn->cid); | |
2944 | ||
2945 | return 0; | |
2946 | } | |
2947 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2948 | ||
2949 | static int | |
2950 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2951 | { | |
2854bb23 | 2952 | int rc; |
2ec5a8c1 NB |
2953 | |
2954 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2955 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2956 | if (rc < 0) | |
2957 | return rc; | |
2958 | ||
2854bb23 | 2959 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
e48354ce NB |
2960 | } |
2961 | ||
2ec5a8c1 NB |
2962 | void |
2963 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2964 | struct iscsi_nopin *hdr, bool nopout_response) | |
2965 | { | |
2966 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2967 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2968 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2969 | if (nopout_response) | |
2970 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2971 | hdr->itt = cmd->init_task_tag; | |
2972 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2973 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2974 | conn->stat_sn; | |
2975 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2976 | ||
2977 | if (nopout_response) | |
2978 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2979 | ||
2980 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2981 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
2982 | |
2983 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2984 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
2985 | "Solicitied" : "Unsolicitied", cmd->init_task_tag, | |
2986 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2987 | } | |
2988 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2989 | ||
e48354ce NB |
2990 | /* |
2991 | * Unsolicited NOPIN, either requesting a response or not. | |
2992 | */ | |
2993 | static int iscsit_send_unsolicited_nopin( | |
2994 | struct iscsi_cmd *cmd, | |
2995 | struct iscsi_conn *conn, | |
2996 | int want_response) | |
2997 | { | |
2ec5a8c1 | 2998 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2854bb23 | 2999 | int ret; |
e48354ce | 3000 | |
2ec5a8c1 | 3001 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce | 3002 | |
e48354ce NB |
3003 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" |
3004 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
3005 | ||
2854bb23 VP |
3006 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
3007 | if (ret < 0) | |
6f3c0e69 | 3008 | return ret; |
6f3c0e69 AG |
3009 | |
3010 | spin_lock_bh(&cmd->istate_lock); | |
3011 | cmd->i_state = want_response ? | |
3012 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
3013 | spin_unlock_bh(&cmd->istate_lock); | |
3014 | ||
e48354ce NB |
3015 | return 0; |
3016 | } | |
3017 | ||
2ec5a8c1 NB |
3018 | static int |
3019 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 3020 | { |
2ec5a8c1 | 3021 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 3022 | |
2ec5a8c1 | 3023 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 3024 | |
e48354ce NB |
3025 | /* |
3026 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
3027 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
3028 | */ | |
2854bb23 | 3029 | pr_debug("Echoing back %u bytes of ping data.\n", cmd->buf_ptr_size); |
e48354ce | 3030 | |
2854bb23 VP |
3031 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3032 | cmd->buf_ptr, | |
3033 | cmd->buf_ptr_size); | |
e48354ce NB |
3034 | } |
3035 | ||
6f3c0e69 | 3036 | static int iscsit_send_r2t( |
e48354ce NB |
3037 | struct iscsi_cmd *cmd, |
3038 | struct iscsi_conn *conn) | |
3039 | { | |
e48354ce NB |
3040 | struct iscsi_r2t *r2t; |
3041 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 3042 | int ret; |
e48354ce NB |
3043 | |
3044 | r2t = iscsit_get_r2t_from_list(cmd); | |
3045 | if (!r2t) | |
3046 | return -1; | |
3047 | ||
3048 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3049 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3050 | hdr->opcode = ISCSI_OP_R2T; | |
3051 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3052 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3053 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3054 | hdr->itt = cmd->init_task_tag; |
8567270d VP |
3055 | if (conn->conn_transport->iscsit_get_r2t_ttt) |
3056 | conn->conn_transport->iscsit_get_r2t_ttt(conn, cmd, r2t); | |
3057 | else | |
3058 | r2t->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
e48354ce NB |
3059 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); |
3060 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3061 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3062 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce NB |
3063 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); |
3064 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3065 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3066 | ||
e48354ce NB |
3067 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" |
3068 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3069 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3070 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3071 | r2t->offset, r2t->xfer_len, conn->cid); | |
3072 | ||
e48354ce NB |
3073 | spin_lock_bh(&cmd->r2t_lock); |
3074 | r2t->sent_r2t = 1; | |
3075 | spin_unlock_bh(&cmd->r2t_lock); | |
3076 | ||
2854bb23 | 3077 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
6f3c0e69 | 3078 | if (ret < 0) { |
6f3c0e69 AG |
3079 | return ret; |
3080 | } | |
3081 | ||
3082 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3083 | iscsit_start_dataout_timer(cmd, conn); | |
3084 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3085 | ||
e48354ce NB |
3086 | return 0; |
3087 | } | |
3088 | ||
3089 | /* | |
8b1e1244 AG |
3090 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3091 | * connection recovery. | |
e48354ce NB |
3092 | */ |
3093 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3094 | struct iscsi_conn *conn, |
3e1c81a9 | 3095 | struct iscsi_cmd *cmd, |
8b1e1244 | 3096 | bool recovery) |
e48354ce NB |
3097 | { |
3098 | int first_r2t = 1; | |
3099 | u32 offset = 0, xfer_len = 0; | |
3100 | ||
3101 | spin_lock_bh(&cmd->r2t_lock); | |
3102 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3103 | spin_unlock_bh(&cmd->r2t_lock); | |
3104 | return 0; | |
3105 | } | |
3106 | ||
8b1e1244 AG |
3107 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3108 | !recovery) | |
c6037cc5 | 3109 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3110 | |
3111 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3112 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3113 | offset = cmd->r2t_offset; | |
3114 | ||
8b1e1244 AG |
3115 | if (first_r2t && recovery) { |
3116 | int new_data_end = offset + | |
3117 | conn->sess->sess_ops->MaxBurstLength - | |
3118 | cmd->next_burst_len; | |
3119 | ||
ebf1d95c AG |
3120 | if (new_data_end > cmd->se_cmd.data_length) |
3121 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3122 | else |
3123 | xfer_len = | |
3124 | conn->sess->sess_ops->MaxBurstLength - | |
3125 | cmd->next_burst_len; | |
e48354ce | 3126 | } else { |
8b1e1244 AG |
3127 | int new_data_end = offset + |
3128 | conn->sess->sess_ops->MaxBurstLength; | |
3129 | ||
ebf1d95c AG |
3130 | if (new_data_end > cmd->se_cmd.data_length) |
3131 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3132 | else |
3133 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3134 | } |
3135 | cmd->r2t_offset += xfer_len; | |
3136 | ||
ebf1d95c | 3137 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3138 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3139 | } else { | |
3140 | struct iscsi_seq *seq; | |
3141 | ||
3142 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3143 | if (!seq) { | |
3144 | spin_unlock_bh(&cmd->r2t_lock); | |
3145 | return -1; | |
3146 | } | |
3147 | ||
3148 | offset = seq->offset; | |
3149 | xfer_len = seq->xfer_len; | |
3150 | ||
3151 | if (cmd->seq_send_order == cmd->seq_count) | |
3152 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3153 | } | |
3154 | cmd->outstanding_r2ts++; | |
3155 | first_r2t = 0; | |
3156 | ||
3157 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3158 | spin_unlock_bh(&cmd->r2t_lock); | |
3159 | return -1; | |
3160 | } | |
3161 | ||
3162 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3163 | break; | |
3164 | } | |
3165 | spin_unlock_bh(&cmd->r2t_lock); | |
3166 | ||
3167 | return 0; | |
3168 | } | |
d2faaefb | 3169 | EXPORT_SYMBOL(iscsit_build_r2ts_for_cmd); |
e48354ce | 3170 | |
2ec5a8c1 NB |
3171 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3172 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3173 | { |
2ec5a8c1 | 3174 | if (inc_stat_sn) |
e48354ce NB |
3175 | cmd->stat_sn = conn->stat_sn++; |
3176 | ||
04f3b31b | 3177 | atomic_long_inc(&conn->sess->rsp_pdus); |
e48354ce | 3178 | |
e48354ce NB |
3179 | memset(hdr, 0, ISCSI_HDR_LEN); |
3180 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3181 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3182 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3183 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3184 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3185 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3186 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3187 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3188 | } |
3189 | hdr->response = cmd->iscsi_response; | |
3190 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3191 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3192 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3193 | ||
3194 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3195 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3196 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3197 | |
2ec5a8c1 NB |
3198 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3199 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3200 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3201 | cmd->se_cmd.scsi_status, conn->cid); | |
3202 | } | |
3203 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3204 | ||
3205 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3206 | { | |
3207 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
2ec5a8c1 | 3208 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); |
2854bb23 VP |
3209 | void *data_buf = NULL; |
3210 | u32 padding = 0, data_buf_len = 0; | |
2ec5a8c1 NB |
3211 | |
3212 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3213 | ||
e48354ce NB |
3214 | /* |
3215 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3216 | */ | |
3217 | if (cmd->se_cmd.sense_buffer && | |
3218 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3219 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3220 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3221 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3222 | ||
e48354ce | 3223 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3224 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
2854bb23 VP |
3225 | data_buf = cmd->sense_buffer; |
3226 | data_buf_len = cmd->se_cmd.scsi_sense_length + padding; | |
e48354ce NB |
3227 | |
3228 | if (padding) { | |
9c58b7dd | 3229 | memset(cmd->sense_buffer + |
e48354ce | 3230 | cmd->se_cmd.scsi_sense_length, 0, padding); |
e48354ce NB |
3231 | pr_debug("Adding %u bytes of padding to" |
3232 | " SENSE.\n", padding); | |
3233 | } | |
3234 | ||
e48354ce NB |
3235 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" |
3236 | " Response PDU\n", | |
3237 | cmd->se_cmd.scsi_sense_length); | |
3238 | } | |
3239 | ||
2854bb23 VP |
3240 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, data_buf, |
3241 | data_buf_len); | |
e48354ce NB |
3242 | } |
3243 | ||
3244 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3245 | { | |
3246 | switch (se_tmr->response) { | |
3247 | case TMR_FUNCTION_COMPLETE: | |
3248 | return ISCSI_TMF_RSP_COMPLETE; | |
3249 | case TMR_TASK_DOES_NOT_EXIST: | |
3250 | return ISCSI_TMF_RSP_NO_TASK; | |
3251 | case TMR_LUN_DOES_NOT_EXIST: | |
3252 | return ISCSI_TMF_RSP_NO_LUN; | |
3253 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3254 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
e48354ce NB |
3255 | case TMR_FUNCTION_REJECTED: |
3256 | default: | |
3257 | return ISCSI_TMF_RSP_REJECTED; | |
3258 | } | |
3259 | } | |
3260 | ||
2ec5a8c1 NB |
3261 | void |
3262 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3263 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3264 | { |
3265 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3266 | |
e48354ce | 3267 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3268 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3269 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3270 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3271 | cmd->stat_sn = conn->stat_sn++; |
3272 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3273 | ||
3274 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3275 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3276 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3277 | |
2ec5a8c1 NB |
3278 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3279 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3280 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3281 | } | |
3282 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3283 | ||
3284 | static int | |
3285 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3286 | { | |
3287 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
2ec5a8c1 NB |
3288 | |
3289 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3290 | ||
2854bb23 | 3291 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
e48354ce NB |
3292 | } |
3293 | ||
2f9bc894 NB |
3294 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3295 | { | |
3296 | bool ret = false; | |
3297 | ||
3298 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3299 | const struct sockaddr_in6 sin6 = { | |
3300 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3301 | struct sockaddr_in6 *sock_in6 = | |
3302 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3303 | ||
3304 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3305 | sin6.sin6_addr.s6_addr, 16)) | |
3306 | ret = true; | |
3307 | } else { | |
3308 | struct sockaddr_in * sock_in = | |
3309 | (struct sockaddr_in *)&np->np_sockaddr; | |
3310 | ||
cea0b4ce | 3311 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3312 | ret = true; |
3313 | } | |
3314 | ||
3315 | return ret; | |
3316 | } | |
3317 | ||
8b1e1244 AG |
3318 | #define SENDTARGETS_BUF_LIMIT 32768U |
3319 | ||
22c7aaa5 SG |
3320 | static int |
3321 | iscsit_build_sendtargets_response(struct iscsi_cmd *cmd, | |
e4f4e801 SG |
3322 | enum iscsit_transport_type network_transport, |
3323 | int skip_bytes, bool *completed) | |
e48354ce NB |
3324 | { |
3325 | char *payload = NULL; | |
3326 | struct iscsi_conn *conn = cmd->conn; | |
3327 | struct iscsi_portal_group *tpg; | |
3328 | struct iscsi_tiqn *tiqn; | |
3329 | struct iscsi_tpg_np *tpg_np; | |
3330 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
2dd1d53f | 3331 | int target_name_printed; |
8b1e1244 | 3332 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
6665889c | 3333 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; |
a6415cdd | 3334 | bool active; |
e48354ce | 3335 | |
be7dcfb6 | 3336 | buffer_len = min(conn->conn_ops->MaxRecvDataSegmentLength, |
8b1e1244 | 3337 | SENDTARGETS_BUF_LIMIT); |
e48354ce NB |
3338 | |
3339 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3340 | if (!payload) { | |
3341 | pr_err("Unable to allocate memory for sendtargets" | |
3342 | " response.\n"); | |
3343 | return -ENOMEM; | |
3344 | } | |
6665889c | 3345 | /* |
8060b8dd | 3346 | * Locate pointer to iqn./eui. string for ICF_SENDTARGETS_SINGLE |
6665889c NB |
3347 | * explicit case.. |
3348 | */ | |
8060b8dd | 3349 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) { |
6665889c NB |
3350 | text_ptr = strchr(text_in, '='); |
3351 | if (!text_ptr) { | |
3352 | pr_err("Unable to locate '=' string in text_in:" | |
3353 | " %s\n", text_in); | |
4f45d320 | 3354 | kfree(payload); |
6665889c NB |
3355 | return -EINVAL; |
3356 | } | |
3357 | /* | |
3358 | * Skip over '=' character.. | |
3359 | */ | |
3360 | text_ptr += 1; | |
3361 | } | |
e48354ce NB |
3362 | |
3363 | spin_lock(&tiqn_lock); | |
3364 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
8060b8dd | 3365 | if ((cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) && |
6665889c NB |
3366 | strcmp(tiqn->tiqn, text_ptr)) { |
3367 | continue; | |
3368 | } | |
3369 | ||
2dd1d53f | 3370 | target_name_printed = 0; |
e48354ce NB |
3371 | |
3372 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3373 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3374 | ||
2dd1d53f TG |
3375 | /* If demo_mode_discovery=0 and generate_node_acls=0 |
3376 | * (demo mode dislabed) do not return | |
3377 | * TargetName+TargetAddress unless a NodeACL exists. | |
3378 | */ | |
3379 | ||
3380 | if ((tpg->tpg_attrib.generate_node_acls == 0) && | |
3381 | (tpg->tpg_attrib.demo_mode_discovery == 0) && | |
21aaa23b | 3382 | (!target_tpg_has_node_acl(&tpg->tpg_se_tpg, |
2dd1d53f TG |
3383 | cmd->conn->sess->sess_ops->InitiatorName))) { |
3384 | continue; | |
3385 | } | |
3386 | ||
e48354ce | 3387 | spin_lock(&tpg->tpg_state_lock); |
a6415cdd | 3388 | active = (tpg->tpg_state == TPG_STATE_ACTIVE); |
e48354ce NB |
3389 | spin_unlock(&tpg->tpg_state_lock); |
3390 | ||
a6415cdd DD |
3391 | if (!active && tpg->tpg_attrib.tpg_enabled_sendtargets) |
3392 | continue; | |
3393 | ||
e48354ce NB |
3394 | spin_lock(&tpg->tpg_np_lock); |
3395 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3396 | tpg_np_list) { | |
2f9bc894 NB |
3397 | struct iscsi_np *np = tpg_np->tpg_np; |
3398 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
13a3cf08 | 3399 | struct sockaddr_storage *sockaddr; |
2f9bc894 | 3400 | |
22c7aaa5 SG |
3401 | if (np->np_network_transport != network_transport) |
3402 | continue; | |
3403 | ||
2dd1d53f TG |
3404 | if (!target_name_printed) { |
3405 | len = sprintf(buf, "TargetName=%s", | |
3406 | tiqn->tiqn); | |
3407 | len += 1; | |
3408 | ||
3409 | if ((len + payload_len) > buffer_len) { | |
3410 | spin_unlock(&tpg->tpg_np_lock); | |
3411 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3412 | end_of_buf = 1; | |
3413 | goto eob; | |
3414 | } | |
e4f4e801 SG |
3415 | |
3416 | if (skip_bytes && len <= skip_bytes) { | |
3417 | skip_bytes -= len; | |
3418 | } else { | |
3419 | memcpy(payload + payload_len, buf, len); | |
3420 | payload_len += len; | |
3421 | target_name_printed = 1; | |
3422 | if (len > skip_bytes) | |
3423 | skip_bytes = 0; | |
3424 | } | |
2dd1d53f TG |
3425 | } |
3426 | ||
69d75574 AG |
3427 | if (inaddr_any) |
3428 | sockaddr = &conn->local_sockaddr; | |
1997e625 | 3429 | else |
69d75574 | 3430 | sockaddr = &np->np_sockaddr; |
1997e625 | 3431 | |
69d75574 AG |
3432 | len = sprintf(buf, "TargetAddress=" |
3433 | "%pISpc,%hu", | |
3434 | sockaddr, | |
3435 | tpg->tpgt); | |
e48354ce NB |
3436 | len += 1; |
3437 | ||
3438 | if ((len + payload_len) > buffer_len) { | |
3439 | spin_unlock(&tpg->tpg_np_lock); | |
3440 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3441 | end_of_buf = 1; | |
3442 | goto eob; | |
3443 | } | |
e4f4e801 SG |
3444 | |
3445 | if (skip_bytes && len <= skip_bytes) { | |
3446 | skip_bytes -= len; | |
3447 | } else { | |
3448 | memcpy(payload + payload_len, buf, len); | |
3449 | payload_len += len; | |
3450 | if (len > skip_bytes) | |
3451 | skip_bytes = 0; | |
3452 | } | |
e48354ce NB |
3453 | } |
3454 | spin_unlock(&tpg->tpg_np_lock); | |
3455 | } | |
3456 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3457 | eob: | |
e4f4e801 SG |
3458 | if (end_of_buf) { |
3459 | *completed = false; | |
e48354ce | 3460 | break; |
e4f4e801 | 3461 | } |
6665889c | 3462 | |
8060b8dd | 3463 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) |
6665889c | 3464 | break; |
e48354ce NB |
3465 | } |
3466 | spin_unlock(&tiqn_lock); | |
3467 | ||
3468 | cmd->buf_ptr = payload; | |
3469 | ||
3470 | return payload_len; | |
3471 | } | |
3472 | ||
889c8a68 NB |
3473 | int |
3474 | iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
22c7aaa5 SG |
3475 | struct iscsi_text_rsp *hdr, |
3476 | enum iscsit_transport_type network_transport) | |
e48354ce | 3477 | { |
889c8a68 | 3478 | int text_length, padding; |
e4f4e801 | 3479 | bool completed = true; |
e48354ce | 3480 | |
e4f4e801 SG |
3481 | text_length = iscsit_build_sendtargets_response(cmd, network_transport, |
3482 | cmd->read_data_done, | |
3483 | &completed); | |
e48354ce NB |
3484 | if (text_length < 0) |
3485 | return text_length; | |
3486 | ||
e4f4e801 SG |
3487 | if (completed) { |
3488 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3489 | } else { | |
3490 | hdr->flags |= ISCSI_FLAG_TEXT_CONTINUE; | |
3491 | cmd->read_data_done += text_length; | |
3492 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
3493 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
3494 | } | |
889c8a68 | 3495 | hdr->opcode = ISCSI_OP_TEXT_RSP; |
e48354ce | 3496 | padding = ((-text_length) & 3); |
e48354ce | 3497 | hton24(hdr->dlength, text_length); |
889c8a68 NB |
3498 | hdr->itt = cmd->init_task_tag; |
3499 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3500 | cmd->stat_sn = conn->stat_sn++; | |
3501 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
e48354ce NB |
3502 | |
3503 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
e4f4e801 SG |
3504 | /* |
3505 | * Reset maxcmdsn_inc in multi-part text payload exchanges to | |
3506 | * correctly increment MaxCmdSN for each response answering a | |
3507 | * non immediate text request with a valid CmdSN. | |
3508 | */ | |
3509 | cmd->maxcmdsn_inc = 0; | |
889c8a68 | 3510 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
109e2381 | 3511 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3512 | |
e4f4e801 SG |
3513 | pr_debug("Built Text Response: ITT: 0x%08x, TTT: 0x%08x, StatSN: 0x%08x," |
3514 | " Length: %u, CID: %hu F: %d C: %d\n", cmd->init_task_tag, | |
3515 | cmd->targ_xfer_tag, cmd->stat_sn, text_length, conn->cid, | |
3516 | !!(hdr->flags & ISCSI_FLAG_CMD_FINAL), | |
3517 | !!(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)); | |
889c8a68 NB |
3518 | |
3519 | return text_length + padding; | |
3520 | } | |
3521 | EXPORT_SYMBOL(iscsit_build_text_rsp); | |
e48354ce | 3522 | |
889c8a68 NB |
3523 | static int iscsit_send_text_rsp( |
3524 | struct iscsi_cmd *cmd, | |
3525 | struct iscsi_conn *conn) | |
3526 | { | |
3527 | struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; | |
2854bb23 | 3528 | int text_length; |
e48354ce | 3529 | |
864e504a VP |
3530 | text_length = iscsit_build_text_rsp(cmd, conn, hdr, |
3531 | conn->conn_transport->transport_type); | |
2854bb23 VP |
3532 | if (text_length < 0) |
3533 | return text_length; | |
e48354ce | 3534 | |
2854bb23 VP |
3535 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3536 | cmd->buf_ptr, | |
3537 | text_length); | |
e48354ce NB |
3538 | } |
3539 | ||
2ec5a8c1 NB |
3540 | void |
3541 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3542 | struct iscsi_reject *hdr) | |
3543 | { | |
3544 | hdr->opcode = ISCSI_OP_REJECT; | |
ba159914 | 3545 | hdr->reason = cmd->reject_reason; |
2ec5a8c1 NB |
3546 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
3547 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3548 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3549 | cmd->stat_sn = conn->stat_sn++; | |
3550 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3551 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3552 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
3553 | |
3554 | } | |
3555 | EXPORT_SYMBOL(iscsit_build_reject); | |
3556 | ||
e48354ce NB |
3557 | static int iscsit_send_reject( |
3558 | struct iscsi_cmd *cmd, | |
3559 | struct iscsi_conn *conn) | |
3560 | { | |
bfbdb31d | 3561 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3562 | |
bfbdb31d | 3563 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce | 3564 | |
e48354ce NB |
3565 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," |
3566 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3567 | ||
2854bb23 VP |
3568 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3569 | cmd->buf_ptr, | |
3570 | ISCSI_HDR_LEN); | |
e48354ce NB |
3571 | } |
3572 | ||
e48354ce NB |
3573 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3574 | { | |
e48354ce NB |
3575 | int ord, cpu; |
3576 | /* | |
88dcd2da NB |
3577 | * bitmap_id is assigned from iscsit_global->ts_bitmap from |
3578 | * within iscsit_start_kthreads() | |
e48354ce | 3579 | * |
88dcd2da NB |
3580 | * Here we use bitmap_id to determine which CPU that this |
3581 | * iSCSI connection's RX/TX threads will be scheduled to | |
e48354ce NB |
3582 | * execute upon. |
3583 | */ | |
88dcd2da | 3584 | ord = conn->bitmap_id % cpumask_weight(cpu_online_mask); |
e48354ce NB |
3585 | for_each_online_cpu(cpu) { |
3586 | if (ord-- == 0) { | |
3587 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3588 | return; | |
3589 | } | |
3590 | } | |
3591 | /* | |
3592 | * This should never be reached.. | |
3593 | */ | |
3594 | dump_stack(); | |
3595 | cpumask_setall(conn->conn_cpumask); | |
3596 | } | |
3597 | ||
d2faaefb | 3598 | int |
2ec5a8c1 | 3599 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) |
e48354ce | 3600 | { |
6f3c0e69 AG |
3601 | int ret; |
3602 | ||
2ec5a8c1 NB |
3603 | switch (state) { |
3604 | case ISTATE_SEND_R2T: | |
3605 | ret = iscsit_send_r2t(cmd, conn); | |
3606 | if (ret < 0) | |
3607 | goto err; | |
3608 | break; | |
3609 | case ISTATE_REMOVE: | |
3610 | spin_lock_bh(&conn->cmd_lock); | |
5159d763 | 3611 | list_del_init(&cmd->i_conn_node); |
2ec5a8c1 | 3612 | spin_unlock_bh(&conn->cmd_lock); |
6f3c0e69 | 3613 | |
aafc9d15 | 3614 | iscsit_free_cmd(cmd, false); |
2ec5a8c1 NB |
3615 | break; |
3616 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3617 | iscsit_mod_nopin_response_timer(conn); | |
3618 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3619 | if (ret < 0) | |
6f3c0e69 | 3620 | goto err; |
2ec5a8c1 NB |
3621 | break; |
3622 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3623 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3624 | if (ret < 0) | |
3625 | goto err; | |
3626 | break; | |
3627 | default: | |
3628 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3629 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3630 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3631 | conn->cid); | |
3632 | goto err; | |
6f3c0e69 AG |
3633 | } |
3634 | ||
3635 | return 0; | |
3636 | ||
3637 | err: | |
3638 | return -1; | |
3639 | } | |
d2faaefb | 3640 | EXPORT_SYMBOL(iscsit_immediate_queue); |
6f3c0e69 | 3641 | |
2ec5a8c1 NB |
3642 | static int |
3643 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3644 | { |
2ec5a8c1 | 3645 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3646 | struct iscsi_queue_req *qr; |
3647 | struct iscsi_cmd *cmd; | |
3648 | u8 state; | |
3649 | int ret; | |
3650 | ||
2ec5a8c1 NB |
3651 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3652 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3653 | cmd = qr->cmd; |
3654 | state = qr->state; | |
3655 | kmem_cache_free(lio_qr_cache, qr); | |
3656 | ||
2ec5a8c1 NB |
3657 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3658 | if (ret < 0) | |
3659 | return ret; | |
3660 | } | |
fd3a9025 | 3661 | |
2ec5a8c1 NB |
3662 | return 0; |
3663 | } | |
6f3c0e69 | 3664 | |
d2faaefb | 3665 | int |
2ec5a8c1 NB |
3666 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) |
3667 | { | |
3668 | int ret; | |
3669 | ||
3670 | check_rsp_state: | |
3671 | switch (state) { | |
3672 | case ISTATE_SEND_DATAIN: | |
3673 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3674 | if (ret < 0) |
3675 | goto err; | |
2ec5a8c1 NB |
3676 | else if (!ret) |
3677 | /* more drs */ | |
3678 | goto check_rsp_state; | |
3679 | else if (ret == 1) { | |
3680 | /* all done */ | |
3681 | spin_lock_bh(&cmd->istate_lock); | |
3682 | cmd->i_state = ISTATE_SENT_STATUS; | |
3683 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3684 | |
2ec5a8c1 NB |
3685 | if (atomic_read(&conn->check_immediate_queue)) |
3686 | return 1; | |
6f3c0e69 | 3687 | |
2ec5a8c1 NB |
3688 | return 0; |
3689 | } else if (ret == 2) { | |
3690 | /* Still must send status, | |
3691 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3692 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3693 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3694 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3695 | state = ISTATE_SEND_STATUS; |
3696 | goto check_rsp_state; | |
3697 | } | |
3698 | ||
3699 | break; | |
3700 | case ISTATE_SEND_STATUS: | |
3701 | case ISTATE_SEND_STATUS_RECOVERY: | |
3702 | ret = iscsit_send_response(cmd, conn); | |
3703 | break; | |
3704 | case ISTATE_SEND_LOGOUTRSP: | |
3705 | ret = iscsit_send_logout(cmd, conn); | |
3706 | break; | |
3707 | case ISTATE_SEND_ASYNCMSG: | |
3708 | ret = iscsit_send_conn_drop_async_message( | |
3709 | cmd, conn); | |
3710 | break; | |
3711 | case ISTATE_SEND_NOPIN: | |
3712 | ret = iscsit_send_nopin(cmd, conn); | |
3713 | break; | |
3714 | case ISTATE_SEND_REJECT: | |
3715 | ret = iscsit_send_reject(cmd, conn); | |
3716 | break; | |
3717 | case ISTATE_SEND_TASKMGTRSP: | |
3718 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3719 | if (ret != 0) | |
6f3c0e69 | 3720 | break; |
2ec5a8c1 NB |
3721 | ret = iscsit_tmr_post_handler(cmd, conn); |
3722 | if (ret != 0) | |
3723 | iscsit_fall_back_to_erl0(conn->sess); | |
3724 | break; | |
3725 | case ISTATE_SEND_TEXTRSP: | |
3726 | ret = iscsit_send_text_rsp(cmd, conn); | |
3727 | break; | |
3728 | default: | |
3729 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3730 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3731 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3732 | state, conn->cid); | |
3733 | goto err; | |
3734 | } | |
3735 | if (ret < 0) | |
3736 | goto err; | |
3737 | ||
2ec5a8c1 NB |
3738 | switch (state) { |
3739 | case ISTATE_SEND_LOGOUTRSP: | |
3740 | if (!iscsit_logout_post_handler(cmd, conn)) | |
88dcd2da | 3741 | return -ECONNRESET; |
2ec5a8c1 NB |
3742 | /* fall through */ |
3743 | case ISTATE_SEND_STATUS: | |
3744 | case ISTATE_SEND_ASYNCMSG: | |
3745 | case ISTATE_SEND_NOPIN: | |
3746 | case ISTATE_SEND_STATUS_RECOVERY: | |
3747 | case ISTATE_SEND_TEXTRSP: | |
3748 | case ISTATE_SEND_TASKMGTRSP: | |
ba159914 | 3749 | case ISTATE_SEND_REJECT: |
2ec5a8c1 NB |
3750 | spin_lock_bh(&cmd->istate_lock); |
3751 | cmd->i_state = ISTATE_SENT_STATUS; | |
3752 | spin_unlock_bh(&cmd->istate_lock); | |
3753 | break; | |
2ec5a8c1 NB |
3754 | default: |
3755 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3756 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3757 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3758 | cmd->i_state, conn->cid); | |
3759 | goto err; | |
6f3c0e69 AG |
3760 | } |
3761 | ||
2ec5a8c1 NB |
3762 | if (atomic_read(&conn->check_immediate_queue)) |
3763 | return 1; | |
3764 | ||
6f3c0e69 AG |
3765 | return 0; |
3766 | ||
3767 | err: | |
3768 | return -1; | |
6f3c0e69 | 3769 | } |
d2faaefb | 3770 | EXPORT_SYMBOL(iscsit_response_queue); |
6f3c0e69 | 3771 | |
2ec5a8c1 NB |
3772 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3773 | { | |
3774 | struct iscsit_transport *t = conn->conn_transport; | |
3775 | struct iscsi_queue_req *qr; | |
3776 | struct iscsi_cmd *cmd; | |
3777 | u8 state; | |
3778 | int ret; | |
3779 | ||
3780 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3781 | cmd = qr->cmd; | |
3782 | state = qr->state; | |
3783 | kmem_cache_free(lio_qr_cache, qr); | |
3784 | ||
3785 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3786 | if (ret == 1 || ret < 0) | |
3787 | return ret; | |
3788 | } | |
3789 | ||
3790 | return 0; | |
3791 | } | |
3792 | ||
6f3c0e69 AG |
3793 | int iscsi_target_tx_thread(void *arg) |
3794 | { | |
e48354ce | 3795 | int ret = 0; |
88dcd2da | 3796 | struct iscsi_conn *conn = arg; |
e48354ce NB |
3797 | /* |
3798 | * Allow ourselves to be interrupted by SIGINT so that a | |
3799 | * connection recovery / failure event can be triggered externally. | |
3800 | */ | |
3801 | allow_signal(SIGINT); | |
3802 | ||
e48354ce NB |
3803 | while (!kthread_should_stop()) { |
3804 | /* | |
3805 | * Ensure that both TX and RX per connection kthreads | |
3806 | * are scheduled to run on the same CPU. | |
3807 | */ | |
3808 | iscsit_thread_check_cpumask(conn, current, 1); | |
3809 | ||
d5627acb | 3810 | wait_event_interruptible(conn->queues_wq, |
88dcd2da | 3811 | !iscsit_conn_all_queues_empty(conn)); |
e48354ce | 3812 | |
88dcd2da | 3813 | if (signal_pending(current)) |
e48354ce NB |
3814 | goto transport_err; |
3815 | ||
fd3a9025 | 3816 | get_immediate: |
2ec5a8c1 | 3817 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3818 | if (ret < 0) |
3819 | goto transport_err; | |
e48354ce | 3820 | |
2ec5a8c1 | 3821 | ret = iscsit_handle_response_queue(conn); |
fd3a9025 NB |
3822 | if (ret == 1) |
3823 | goto get_immediate; | |
88dcd2da NB |
3824 | else if (ret == -ECONNRESET) |
3825 | goto out; | |
6f3c0e69 AG |
3826 | else if (ret < 0) |
3827 | goto transport_err; | |
e48354ce NB |
3828 | } |
3829 | ||
3830 | transport_err: | |
e5419865 NB |
3831 | /* |
3832 | * Avoid the normal connection failure code-path if this connection | |
3833 | * is still within LOGIN mode, and iscsi_np process context is | |
3834 | * responsible for cleaning up the early connection failure. | |
3835 | */ | |
3836 | if (conn->conn_state != TARG_CONN_STATE_IN_LOGIN) | |
3837 | iscsit_take_action_for_connection_exit(conn); | |
e48354ce NB |
3838 | out: |
3839 | return 0; | |
3840 | } | |
3841 | ||
3e1c81a9 NB |
3842 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
3843 | { | |
3844 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
3845 | struct iscsi_cmd *cmd; | |
3846 | int ret = 0; | |
3847 | ||
3848 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
3849 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 3850 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3851 | if (!cmd) |
ba159914 | 3852 | goto reject; |
3e1c81a9 NB |
3853 | |
3854 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
3855 | break; | |
3856 | case ISCSI_OP_SCSI_DATA_OUT: | |
3857 | ret = iscsit_handle_data_out(conn, buf); | |
3858 | break; | |
3859 | case ISCSI_OP_NOOP_OUT: | |
3860 | cmd = NULL; | |
3861 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
676687c6 | 3862 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3863 | if (!cmd) |
ba159914 | 3864 | goto reject; |
3e1c81a9 NB |
3865 | } |
3866 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
3867 | break; | |
3868 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 3869 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3870 | if (!cmd) |
ba159914 | 3871 | goto reject; |
3e1c81a9 NB |
3872 | |
3873 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
3874 | break; | |
3875 | case ISCSI_OP_TEXT: | |
e4f4e801 SG |
3876 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { |
3877 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); | |
3878 | if (!cmd) | |
3879 | goto reject; | |
3880 | } else { | |
3881 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); | |
3882 | if (!cmd) | |
3883 | goto reject; | |
3884 | } | |
64534aa7 NB |
3885 | |
3886 | ret = iscsit_handle_text_cmd(conn, cmd, buf); | |
3e1c81a9 NB |
3887 | break; |
3888 | case ISCSI_OP_LOGOUT: | |
676687c6 | 3889 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3890 | if (!cmd) |
ba159914 | 3891 | goto reject; |
3e1c81a9 NB |
3892 | |
3893 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
3894 | if (ret > 0) | |
3895 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3896 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3897 | break; | |
3898 | case ISCSI_OP_SNACK: | |
3899 | ret = iscsit_handle_snack(conn, buf); | |
3900 | break; | |
3901 | default: | |
3902 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
3903 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
3904 | pr_err("Cannot recover from unknown" | |
3905 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
3906 | return -1; | |
3907 | } | |
c04a6091 CVB |
3908 | pr_err("Unable to recover from unknown opcode while OFMarker=No," |
3909 | " closing iSCSI connection.\n"); | |
3910 | ret = -1; | |
3e1c81a9 NB |
3911 | break; |
3912 | } | |
3913 | ||
3914 | return ret; | |
ba159914 NB |
3915 | reject: |
3916 | return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
3917 | } |
3918 | ||
ca82c2bd NB |
3919 | static bool iscsi_target_check_conn_state(struct iscsi_conn *conn) |
3920 | { | |
3921 | bool ret; | |
3922 | ||
3923 | spin_lock_bh(&conn->state_lock); | |
3924 | ret = (conn->conn_state != TARG_CONN_STATE_LOGGED_IN); | |
3925 | spin_unlock_bh(&conn->state_lock); | |
3926 | ||
3927 | return ret; | |
3928 | } | |
3929 | ||
e8205cca | 3930 | static void iscsit_get_rx_pdu(struct iscsi_conn *conn) |
e48354ce | 3931 | { |
e8205cca | 3932 | int ret; |
e48354ce NB |
3933 | u8 buffer[ISCSI_HDR_LEN], opcode; |
3934 | u32 checksum = 0, digest = 0; | |
e48354ce | 3935 | struct kvec iov; |
3e1c81a9 | 3936 | |
e48354ce NB |
3937 | while (!kthread_should_stop()) { |
3938 | /* | |
3939 | * Ensure that both TX and RX per connection kthreads | |
3940 | * are scheduled to run on the same CPU. | |
3941 | */ | |
3942 | iscsit_thread_check_cpumask(conn, current, 0); | |
3943 | ||
3944 | memset(buffer, 0, ISCSI_HDR_LEN); | |
3945 | memset(&iov, 0, sizeof(struct kvec)); | |
3946 | ||
3947 | iov.iov_base = buffer; | |
3948 | iov.iov_len = ISCSI_HDR_LEN; | |
3949 | ||
3950 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
3951 | if (ret != ISCSI_HDR_LEN) { | |
3952 | iscsit_rx_thread_wait_for_tcp(conn); | |
e8205cca | 3953 | return; |
e48354ce NB |
3954 | } |
3955 | ||
e48354ce NB |
3956 | if (conn->conn_ops->HeaderDigest) { |
3957 | iov.iov_base = &digest; | |
3958 | iov.iov_len = ISCSI_CRC_LEN; | |
3959 | ||
3960 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
3961 | if (ret != ISCSI_CRC_LEN) { | |
3962 | iscsit_rx_thread_wait_for_tcp(conn); | |
e8205cca | 3963 | return; |
e48354ce NB |
3964 | } |
3965 | ||
69110e3c | 3966 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
e48354ce NB |
3967 | buffer, ISCSI_HDR_LEN, |
3968 | 0, NULL, (u8 *)&checksum); | |
3969 | ||
3970 | if (digest != checksum) { | |
3971 | pr_err("HeaderDigest CRC32C failed," | |
3972 | " received 0x%08x, computed 0x%08x\n", | |
3973 | digest, checksum); | |
3974 | /* | |
3975 | * Set the PDU to 0xff so it will intentionally | |
3976 | * hit default in the switch below. | |
3977 | */ | |
3978 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
04f3b31b | 3979 | atomic_long_inc(&conn->sess->conn_digest_errors); |
e48354ce NB |
3980 | } else { |
3981 | pr_debug("Got HeaderDigest CRC32C" | |
3982 | " 0x%08x\n", checksum); | |
3983 | } | |
3984 | } | |
3985 | ||
3986 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
e8205cca | 3987 | return; |
e48354ce NB |
3988 | |
3989 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
3990 | ||
3991 | if (conn->sess->sess_ops->SessionType && | |
3992 | ((!(opcode & ISCSI_OP_TEXT)) || | |
3993 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
3994 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
3995 | " while in Discovery Session, rejecting.\n", opcode); | |
ba159914 NB |
3996 | iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
3997 | buffer); | |
e8205cca | 3998 | return; |
e48354ce NB |
3999 | } |
4000 | ||
3e1c81a9 NB |
4001 | ret = iscsi_target_rx_opcode(conn, buffer); |
4002 | if (ret < 0) | |
e8205cca | 4003 | return; |
e48354ce | 4004 | } |
e8205cca VP |
4005 | } |
4006 | ||
4007 | int iscsi_target_rx_thread(void *arg) | |
4008 | { | |
4009 | int rc; | |
4010 | struct iscsi_conn *conn = arg; | |
4011 | ||
4012 | /* | |
4013 | * Allow ourselves to be interrupted by SIGINT so that a | |
4014 | * connection recovery / failure event can be triggered externally. | |
4015 | */ | |
4016 | allow_signal(SIGINT); | |
4017 | /* | |
4018 | * Wait for iscsi_post_login_handler() to complete before allowing | |
4019 | * incoming iscsi/tcp socket I/O, and/or failing the connection. | |
4020 | */ | |
4021 | rc = wait_for_completion_interruptible(&conn->rx_login_comp); | |
4022 | if (rc < 0 || iscsi_target_check_conn_state(conn)) | |
4023 | return 0; | |
4024 | ||
4025 | if (!conn->conn_transport->iscsit_get_rx_pdu) | |
4026 | return 0; | |
4027 | ||
4028 | conn->conn_transport->iscsit_get_rx_pdu(conn); | |
e48354ce | 4029 | |
e48354ce NB |
4030 | if (!signal_pending(current)) |
4031 | atomic_set(&conn->transport_failed, 1); | |
4032 | iscsit_take_action_for_connection_exit(conn); | |
e48354ce NB |
4033 | return 0; |
4034 | } | |
4035 | ||
4036 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4037 | { | |
064cdd2d | 4038 | LIST_HEAD(tmp_list); |
e48354ce NB |
4039 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; |
4040 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4041 | /* |
4042 | * We expect this function to only ever be called from either RX or TX | |
4043 | * thread context via iscsit_close_connection() once the other context | |
4044 | * has been reset -> returned sleeping pre-handler state. | |
4045 | */ | |
4046 | spin_lock_bh(&conn->cmd_lock); | |
064cdd2d | 4047 | list_splice_init(&conn->conn_cmd_list, &tmp_list); |
e48354ce | 4048 | |
064cdd2d NB |
4049 | list_for_each_entry(cmd, &tmp_list, i_conn_node) { |
4050 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
4051 | ||
4052 | if (se_cmd->se_tfo != NULL) { | |
4053 | spin_lock(&se_cmd->t_state_lock); | |
4054 | se_cmd->transport_state |= CMD_T_FABRIC_STOP; | |
4055 | spin_unlock(&se_cmd->t_state_lock); | |
4056 | } | |
4057 | } | |
4058 | spin_unlock_bh(&conn->cmd_lock); | |
4059 | ||
4060 | list_for_each_entry_safe(cmd, cmd_tmp, &tmp_list, i_conn_node) { | |
5159d763 | 4061 | list_del_init(&cmd->i_conn_node); |
e48354ce NB |
4062 | |
4063 | iscsit_increment_maxcmdsn(cmd, sess); | |
aafc9d15 | 4064 | iscsit_free_cmd(cmd, true); |
e48354ce | 4065 | |
e48354ce | 4066 | } |
e48354ce NB |
4067 | } |
4068 | ||
4069 | static void iscsit_stop_timers_for_cmds( | |
4070 | struct iscsi_conn *conn) | |
4071 | { | |
4072 | struct iscsi_cmd *cmd; | |
4073 | ||
4074 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4075 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4076 | if (cmd->data_direction == DMA_TO_DEVICE) |
4077 | iscsit_stop_dataout_timer(cmd); | |
4078 | } | |
4079 | spin_unlock_bh(&conn->cmd_lock); | |
4080 | } | |
4081 | ||
4082 | int iscsit_close_connection( | |
4083 | struct iscsi_conn *conn) | |
4084 | { | |
4085 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4086 | struct iscsi_session *sess = conn->sess; | |
4087 | ||
4088 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4089 | " %u\n", conn->cid, sess->sid); | |
4090 | /* | |
b4869ee9 VP |
4091 | * Always up conn_logout_comp for the traditional TCP and HW_OFFLOAD |
4092 | * case just in case the RX Thread in iscsi_target_rx_opcode() is | |
4093 | * sleeping and the logout response never got sent because the | |
4094 | * connection failed. | |
f068fbc8 NB |
4095 | * |
4096 | * However for iser-target, isert_wait4logout() is using conn_logout_comp | |
4097 | * to signal logout response TX interrupt completion. Go ahead and skip | |
4098 | * this for iser since isert_rx_opcode() does not wait on logout failure, | |
4099 | * and to avoid iscsi_conn pointer dereference in iser-target code. | |
e48354ce | 4100 | */ |
bd027d85 | 4101 | if (!conn->conn_transport->rdma_shutdown) |
f068fbc8 | 4102 | complete(&conn->conn_logout_comp); |
e48354ce | 4103 | |
88dcd2da NB |
4104 | if (!strcmp(current->comm, ISCSI_RX_THREAD_NAME)) { |
4105 | if (conn->tx_thread && | |
4106 | cmpxchg(&conn->tx_thread_active, true, false)) { | |
4107 | send_sig(SIGINT, conn->tx_thread, 1); | |
4108 | kthread_stop(conn->tx_thread); | |
4109 | } | |
4110 | } else if (!strcmp(current->comm, ISCSI_TX_THREAD_NAME)) { | |
4111 | if (conn->rx_thread && | |
4112 | cmpxchg(&conn->rx_thread_active, true, false)) { | |
4113 | send_sig(SIGINT, conn->rx_thread, 1); | |
4114 | kthread_stop(conn->rx_thread); | |
4115 | } | |
4116 | } | |
4117 | ||
4118 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
4119 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
4120 | get_order(1)); | |
4121 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
e48354ce NB |
4122 | |
4123 | iscsit_stop_timers_for_cmds(conn); | |
4124 | iscsit_stop_nopin_response_timer(conn); | |
4125 | iscsit_stop_nopin_timer(conn); | |
defd8848 NB |
4126 | |
4127 | if (conn->conn_transport->iscsit_wait_conn) | |
4128 | conn->conn_transport->iscsit_wait_conn(conn); | |
4129 | ||
e48354ce NB |
4130 | /* |
4131 | * During Connection recovery drop unacknowledged out of order | |
4132 | * commands for this connection, and prepare the other commands | |
4133 | * for realligence. | |
4134 | * | |
4135 | * During normal operation clear the out of order commands (but | |
4136 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4137 | * struct iscsi_cmds. | |
4138 | */ | |
4139 | if (atomic_read(&conn->connection_recovery)) { | |
4140 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4141 | iscsit_prepare_cmds_for_realligance(conn); | |
4142 | } else { | |
4143 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4144 | iscsit_release_commands_from_conn(conn); | |
4145 | } | |
bbc05048 | 4146 | iscsit_free_queue_reqs_for_conn(conn); |
e48354ce NB |
4147 | |
4148 | /* | |
4149 | * Handle decrementing session or connection usage count if | |
4150 | * a logout response was not able to be sent because the | |
4151 | * connection failed. Fall back to Session Recovery here. | |
4152 | */ | |
4153 | if (atomic_read(&conn->conn_logout_remove)) { | |
4154 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4155 | iscsit_dec_conn_usage_count(conn); | |
4156 | iscsit_dec_session_usage_count(sess); | |
4157 | } | |
4158 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4159 | iscsit_dec_conn_usage_count(conn); | |
4160 | ||
4161 | atomic_set(&conn->conn_logout_remove, 0); | |
4162 | atomic_set(&sess->session_reinstatement, 0); | |
4163 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4164 | } | |
4165 | ||
4166 | spin_lock_bh(&sess->conn_lock); | |
4167 | list_del(&conn->conn_list); | |
4168 | ||
4169 | /* | |
4170 | * Attempt to let the Initiator know this connection failed by | |
4171 | * sending an Connection Dropped Async Message on another | |
4172 | * active connection. | |
4173 | */ | |
4174 | if (atomic_read(&conn->connection_recovery)) | |
4175 | iscsit_build_conn_drop_async_message(conn); | |
4176 | ||
4177 | spin_unlock_bh(&sess->conn_lock); | |
4178 | ||
4179 | /* | |
4180 | * If connection reinstatement is being performed on this connection, | |
4181 | * up the connection reinstatement semaphore that is being blocked on | |
4182 | * in iscsit_cause_connection_reinstatement(). | |
4183 | */ | |
4184 | spin_lock_bh(&conn->state_lock); | |
4185 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4186 | spin_unlock_bh(&conn->state_lock); | |
4187 | complete(&conn->conn_wait_comp); | |
4188 | wait_for_completion(&conn->conn_post_wait_comp); | |
4189 | spin_lock_bh(&conn->state_lock); | |
4190 | } | |
4191 | ||
4192 | /* | |
4193 | * If connection reinstatement is being performed on this connection | |
4194 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4195 | * connection wait rcfr semaphore that is being blocked on | |
4196 | * an iscsit_connection_reinstatement_rcfr(). | |
4197 | */ | |
4198 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4199 | spin_unlock_bh(&conn->state_lock); | |
4200 | complete(&conn->conn_wait_rcfr_comp); | |
4201 | wait_for_completion(&conn->conn_post_wait_comp); | |
4202 | spin_lock_bh(&conn->state_lock); | |
4203 | } | |
4204 | atomic_set(&conn->connection_reinstatement, 1); | |
4205 | spin_unlock_bh(&conn->state_lock); | |
4206 | ||
4207 | /* | |
4208 | * If any other processes are accessing this connection pointer we | |
4209 | * must wait until they have completed. | |
4210 | */ | |
4211 | iscsit_check_conn_usage_count(conn); | |
4212 | ||
69110e3c HX |
4213 | ahash_request_free(conn->conn_tx_hash); |
4214 | if (conn->conn_rx_hash) { | |
4215 | struct crypto_ahash *tfm; | |
4216 | ||
4217 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
4218 | ahash_request_free(conn->conn_rx_hash); | |
4219 | crypto_free_ahash(tfm); | |
4220 | } | |
e48354ce | 4221 | |
fbecb659 | 4222 | free_cpumask_var(conn->conn_cpumask); |
e48354ce NB |
4223 | |
4224 | kfree(conn->conn_ops); | |
4225 | conn->conn_ops = NULL; | |
4226 | ||
bf6932f4 | 4227 | if (conn->sock) |
e48354ce | 4228 | sock_release(conn->sock); |
baa4d64b NB |
4229 | |
4230 | if (conn->conn_transport->iscsit_free_conn) | |
4231 | conn->conn_transport->iscsit_free_conn(conn); | |
4232 | ||
4233 | iscsit_put_transport(conn->conn_transport); | |
4234 | ||
e48354ce NB |
4235 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
4236 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4237 | kfree(conn); | |
4238 | ||
4239 | spin_lock_bh(&sess->conn_lock); | |
4240 | atomic_dec(&sess->nconn); | |
4241 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4242 | " %s\n", atomic_read(&sess->nconn), | |
4243 | sess->sess_ops->InitiatorName); | |
4244 | /* | |
4245 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4246 | * Session that they all fail. | |
4247 | */ | |
4248 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4249 | !atomic_read(&sess->session_logout)) | |
4250 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4251 | ||
4252 | /* | |
4253 | * If this was not the last connection in the session, and we are | |
4254 | * performing session reinstatement or falling back to ERL=0, call | |
4255 | * iscsit_stop_session() without sleeping to shutdown the other | |
4256 | * active connections. | |
4257 | */ | |
4258 | if (atomic_read(&sess->nconn)) { | |
4259 | if (!atomic_read(&sess->session_reinstatement) && | |
4260 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4261 | spin_unlock_bh(&sess->conn_lock); | |
4262 | return 0; | |
4263 | } | |
4264 | if (!atomic_read(&sess->session_stop_active)) { | |
4265 | atomic_set(&sess->session_stop_active, 1); | |
4266 | spin_unlock_bh(&sess->conn_lock); | |
4267 | iscsit_stop_session(sess, 0, 0); | |
4268 | return 0; | |
4269 | } | |
4270 | spin_unlock_bh(&sess->conn_lock); | |
4271 | return 0; | |
4272 | } | |
4273 | ||
4274 | /* | |
4275 | * If this was the last connection in the session and one of the | |
4276 | * following is occurring: | |
4277 | * | |
4278 | * Session Reinstatement is not being performed, and are falling back | |
4279 | * to ERL=0 call iscsit_close_session(). | |
4280 | * | |
4281 | * Session Logout was requested. iscsit_close_session() will be called | |
4282 | * elsewhere. | |
4283 | * | |
4284 | * Session Continuation is not being performed, start the Time2Retain | |
4285 | * handler and check if sleep_on_sess_wait_sem is active. | |
4286 | */ | |
4287 | if (!atomic_read(&sess->session_reinstatement) && | |
4288 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4289 | spin_unlock_bh(&sess->conn_lock); | |
44f33d0f | 4290 | iscsit_close_session(sess); |
e48354ce NB |
4291 | |
4292 | return 0; | |
4293 | } else if (atomic_read(&sess->session_logout)) { | |
4294 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4295 | sess->session_state = TARG_SESS_STATE_FREE; | |
4296 | spin_unlock_bh(&sess->conn_lock); | |
4297 | ||
4298 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4299 | complete(&sess->session_wait_comp); | |
4300 | ||
4301 | return 0; | |
4302 | } else { | |
4303 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4304 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4305 | ||
4306 | if (!atomic_read(&sess->session_continuation)) { | |
4307 | spin_unlock_bh(&sess->conn_lock); | |
4308 | iscsit_start_time2retain_handler(sess); | |
4309 | } else | |
4310 | spin_unlock_bh(&sess->conn_lock); | |
4311 | ||
4312 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4313 | complete(&sess->session_wait_comp); | |
4314 | ||
4315 | return 0; | |
4316 | } | |
e48354ce NB |
4317 | } |
4318 | ||
44f33d0f CH |
4319 | /* |
4320 | * If the iSCSI Session for the iSCSI Initiator Node exists, | |
4321 | * forcefully shutdown the iSCSI NEXUS. | |
4322 | */ | |
e48354ce NB |
4323 | int iscsit_close_session(struct iscsi_session *sess) |
4324 | { | |
60bfcf8e | 4325 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
4326 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
4327 | ||
4328 | if (atomic_read(&sess->nconn)) { | |
4329 | pr_err("%d connection(s) still exist for iSCSI session" | |
4330 | " to %s\n", atomic_read(&sess->nconn), | |
4331 | sess->sess_ops->InitiatorName); | |
4332 | BUG(); | |
4333 | } | |
4334 | ||
4335 | spin_lock_bh(&se_tpg->session_lock); | |
4336 | atomic_set(&sess->session_logout, 1); | |
4337 | atomic_set(&sess->session_reinstatement, 1); | |
4338 | iscsit_stop_time2retain_timer(sess); | |
4339 | spin_unlock_bh(&se_tpg->session_lock); | |
4340 | ||
4341 | /* | |
4342 | * transport_deregister_session_configfs() will clear the | |
4343 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4344 | * can be setting it again with __transport_register_session() in | |
4345 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4346 | * completes in iscsi_np context. | |
4347 | */ | |
4348 | transport_deregister_session_configfs(sess->se_sess); | |
4349 | ||
4350 | /* | |
4351 | * If any other processes are accessing this session pointer we must | |
4352 | * wait until they have completed. If we are in an interrupt (the | |
4353 | * time2retain handler) and contain and active session usage count we | |
4354 | * restart the timer and exit. | |
4355 | */ | |
4356 | if (!in_interrupt()) { | |
4357 | if (iscsit_check_session_usage_count(sess) == 1) | |
4358 | iscsit_stop_session(sess, 1, 1); | |
4359 | } else { | |
4360 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4361 | atomic_set(&sess->session_logout, 0); | |
4362 | iscsit_start_time2retain_handler(sess); | |
4363 | return 0; | |
4364 | } | |
4365 | } | |
4366 | ||
4367 | transport_deregister_session(sess->se_sess); | |
4368 | ||
4369 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4370 | iscsit_free_connection_recovery_entires(sess); | |
4371 | ||
4372 | iscsit_free_all_ooo_cmdsns(sess); | |
4373 | ||
4374 | spin_lock_bh(&se_tpg->session_lock); | |
4375 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4376 | sess->session_state = TARG_SESS_STATE_FREE; | |
4377 | pr_debug("Released iSCSI session from node: %s\n", | |
4378 | sess->sess_ops->InitiatorName); | |
4379 | tpg->nsessions--; | |
4380 | if (tpg->tpg_tiqn) | |
4381 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4382 | ||
4383 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4384 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4385 | ||
4386 | spin_lock(&sess_idr_lock); | |
4387 | idr_remove(&sess_idr, sess->session_index); | |
4388 | spin_unlock(&sess_idr_lock); | |
4389 | ||
4390 | kfree(sess->sess_ops); | |
4391 | sess->sess_ops = NULL; | |
4392 | spin_unlock_bh(&se_tpg->session_lock); | |
4393 | ||
4394 | kfree(sess); | |
4395 | return 0; | |
4396 | } | |
4397 | ||
4398 | static void iscsit_logout_post_handler_closesession( | |
4399 | struct iscsi_conn *conn) | |
4400 | { | |
4401 | struct iscsi_session *sess = conn->sess; | |
007d038b NB |
4402 | int sleep = 1; |
4403 | /* | |
4404 | * Traditional iscsi/tcp will invoke this logic from TX thread | |
4405 | * context during session logout, so clear tx_thread_active and | |
4406 | * sleep if iscsit_close_connection() has not already occured. | |
4407 | * | |
4408 | * Since iser-target invokes this logic from it's own workqueue, | |
4409 | * always sleep waiting for RX/TX thread shutdown to complete | |
4410 | * within iscsit_close_connection(). | |
4411 | */ | |
bd027d85 | 4412 | if (!conn->conn_transport->rdma_shutdown) |
007d038b | 4413 | sleep = cmpxchg(&conn->tx_thread_active, true, false); |
e48354ce NB |
4414 | |
4415 | atomic_set(&conn->conn_logout_remove, 0); | |
4416 | complete(&conn->conn_logout_comp); | |
4417 | ||
4418 | iscsit_dec_conn_usage_count(conn); | |
88dcd2da | 4419 | iscsit_stop_session(sess, sleep, sleep); |
e48354ce | 4420 | iscsit_dec_session_usage_count(sess); |
44f33d0f | 4421 | iscsit_close_session(sess); |
e48354ce NB |
4422 | } |
4423 | ||
4424 | static void iscsit_logout_post_handler_samecid( | |
4425 | struct iscsi_conn *conn) | |
4426 | { | |
007d038b NB |
4427 | int sleep = 1; |
4428 | ||
bd027d85 | 4429 | if (!conn->conn_transport->rdma_shutdown) |
007d038b | 4430 | sleep = cmpxchg(&conn->tx_thread_active, true, false); |
e48354ce NB |
4431 | |
4432 | atomic_set(&conn->conn_logout_remove, 0); | |
4433 | complete(&conn->conn_logout_comp); | |
4434 | ||
88dcd2da | 4435 | iscsit_cause_connection_reinstatement(conn, sleep); |
e48354ce NB |
4436 | iscsit_dec_conn_usage_count(conn); |
4437 | } | |
4438 | ||
4439 | static void iscsit_logout_post_handler_diffcid( | |
4440 | struct iscsi_conn *conn, | |
4441 | u16 cid) | |
4442 | { | |
4443 | struct iscsi_conn *l_conn; | |
4444 | struct iscsi_session *sess = conn->sess; | |
b53b0d99 | 4445 | bool conn_found = false; |
e48354ce NB |
4446 | |
4447 | if (!sess) | |
4448 | return; | |
4449 | ||
4450 | spin_lock_bh(&sess->conn_lock); | |
4451 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4452 | if (l_conn->cid == cid) { | |
4453 | iscsit_inc_conn_usage_count(l_conn); | |
b53b0d99 | 4454 | conn_found = true; |
e48354ce NB |
4455 | break; |
4456 | } | |
4457 | } | |
4458 | spin_unlock_bh(&sess->conn_lock); | |
4459 | ||
b53b0d99 | 4460 | if (!conn_found) |
e48354ce NB |
4461 | return; |
4462 | ||
4463 | if (l_conn->sock) | |
4464 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4465 | ||
4466 | spin_lock_bh(&l_conn->state_lock); | |
4467 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4468 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4469 | spin_unlock_bh(&l_conn->state_lock); | |
4470 | ||
4471 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4472 | iscsit_dec_conn_usage_count(l_conn); | |
4473 | } | |
4474 | ||
4475 | /* | |
4476 | * Return of 0 causes the TX thread to restart. | |
4477 | */ | |
2ec5a8c1 | 4478 | int iscsit_logout_post_handler( |
e48354ce NB |
4479 | struct iscsi_cmd *cmd, |
4480 | struct iscsi_conn *conn) | |
4481 | { | |
4482 | int ret = 0; | |
4483 | ||
4484 | switch (cmd->logout_reason) { | |
4485 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4486 | switch (cmd->logout_response) { | |
4487 | case ISCSI_LOGOUT_SUCCESS: | |
4488 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4489 | default: | |
4490 | iscsit_logout_post_handler_closesession(conn); | |
4491 | break; | |
4492 | } | |
4493 | ret = 0; | |
4494 | break; | |
4495 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4496 | if (conn->cid == cmd->logout_cid) { | |
4497 | switch (cmd->logout_response) { | |
4498 | case ISCSI_LOGOUT_SUCCESS: | |
4499 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4500 | default: | |
4501 | iscsit_logout_post_handler_samecid(conn); | |
4502 | break; | |
4503 | } | |
4504 | ret = 0; | |
4505 | } else { | |
4506 | switch (cmd->logout_response) { | |
4507 | case ISCSI_LOGOUT_SUCCESS: | |
4508 | iscsit_logout_post_handler_diffcid(conn, | |
4509 | cmd->logout_cid); | |
4510 | break; | |
4511 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4512 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4513 | default: | |
4514 | break; | |
4515 | } | |
4516 | ret = 1; | |
4517 | } | |
4518 | break; | |
4519 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4520 | switch (cmd->logout_response) { | |
4521 | case ISCSI_LOGOUT_SUCCESS: | |
4522 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4523 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4524 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4525 | default: | |
4526 | break; | |
4527 | } | |
4528 | ret = 1; | |
4529 | break; | |
4530 | default: | |
4531 | break; | |
4532 | ||
4533 | } | |
4534 | return ret; | |
4535 | } | |
2ec5a8c1 | 4536 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4537 | |
4538 | void iscsit_fail_session(struct iscsi_session *sess) | |
4539 | { | |
4540 | struct iscsi_conn *conn; | |
4541 | ||
4542 | spin_lock_bh(&sess->conn_lock); | |
4543 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4544 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4545 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4546 | } | |
4547 | spin_unlock_bh(&sess->conn_lock); | |
4548 | ||
4549 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4550 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4551 | } | |
4552 | ||
4553 | int iscsit_free_session(struct iscsi_session *sess) | |
4554 | { | |
4555 | u16 conn_count = atomic_read(&sess->nconn); | |
4556 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4557 | int is_last; | |
4558 | ||
4559 | spin_lock_bh(&sess->conn_lock); | |
4560 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4561 | ||
4562 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4563 | conn_list) { | |
4564 | if (conn_count == 0) | |
4565 | break; | |
4566 | ||
4567 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4568 | is_last = 1; | |
4569 | } else { | |
4570 | iscsit_inc_conn_usage_count(conn_tmp); | |
4571 | is_last = 0; | |
4572 | } | |
4573 | iscsit_inc_conn_usage_count(conn); | |
4574 | ||
4575 | spin_unlock_bh(&sess->conn_lock); | |
4576 | iscsit_cause_connection_reinstatement(conn, 1); | |
4577 | spin_lock_bh(&sess->conn_lock); | |
4578 | ||
4579 | iscsit_dec_conn_usage_count(conn); | |
4580 | if (is_last == 0) | |
4581 | iscsit_dec_conn_usage_count(conn_tmp); | |
4582 | ||
4583 | conn_count--; | |
4584 | } | |
4585 | ||
4586 | if (atomic_read(&sess->nconn)) { | |
4587 | spin_unlock_bh(&sess->conn_lock); | |
4588 | wait_for_completion(&sess->session_wait_comp); | |
4589 | } else | |
4590 | spin_unlock_bh(&sess->conn_lock); | |
4591 | ||
44f33d0f | 4592 | iscsit_close_session(sess); |
e48354ce NB |
4593 | return 0; |
4594 | } | |
4595 | ||
4596 | void iscsit_stop_session( | |
4597 | struct iscsi_session *sess, | |
4598 | int session_sleep, | |
4599 | int connection_sleep) | |
4600 | { | |
4601 | u16 conn_count = atomic_read(&sess->nconn); | |
4602 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4603 | int is_last; | |
4604 | ||
4605 | spin_lock_bh(&sess->conn_lock); | |
4606 | if (session_sleep) | |
4607 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4608 | ||
4609 | if (connection_sleep) { | |
4610 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4611 | conn_list) { | |
4612 | if (conn_count == 0) | |
4613 | break; | |
4614 | ||
4615 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4616 | is_last = 1; | |
4617 | } else { | |
4618 | iscsit_inc_conn_usage_count(conn_tmp); | |
4619 | is_last = 0; | |
4620 | } | |
4621 | iscsit_inc_conn_usage_count(conn); | |
4622 | ||
4623 | spin_unlock_bh(&sess->conn_lock); | |
4624 | iscsit_cause_connection_reinstatement(conn, 1); | |
4625 | spin_lock_bh(&sess->conn_lock); | |
4626 | ||
4627 | iscsit_dec_conn_usage_count(conn); | |
4628 | if (is_last == 0) | |
4629 | iscsit_dec_conn_usage_count(conn_tmp); | |
4630 | conn_count--; | |
4631 | } | |
4632 | } else { | |
4633 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4634 | iscsit_cause_connection_reinstatement(conn, 0); | |
4635 | } | |
4636 | ||
4637 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4638 | spin_unlock_bh(&sess->conn_lock); | |
4639 | wait_for_completion(&sess->session_wait_comp); | |
4640 | } else | |
4641 | spin_unlock_bh(&sess->conn_lock); | |
4642 | } | |
4643 | ||
4644 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4645 | { | |
4646 | struct iscsi_session *sess; | |
4647 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4648 | struct se_session *se_sess, *se_sess_tmp; | |
417c20a9 | 4649 | LIST_HEAD(free_list); |
e48354ce NB |
4650 | int session_count = 0; |
4651 | ||
4652 | spin_lock_bh(&se_tpg->session_lock); | |
4653 | if (tpg->nsessions && !force) { | |
4654 | spin_unlock_bh(&se_tpg->session_lock); | |
4655 | return -1; | |
4656 | } | |
4657 | ||
4658 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4659 | sess_list) { | |
4660 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4661 | ||
4662 | spin_lock(&sess->conn_lock); | |
4663 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4664 | atomic_read(&sess->session_logout) || | |
4665 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4666 | spin_unlock(&sess->conn_lock); | |
4667 | continue; | |
4668 | } | |
4669 | atomic_set(&sess->session_reinstatement, 1); | |
4670 | spin_unlock(&sess->conn_lock); | |
e48354ce | 4671 | |
417c20a9 NB |
4672 | list_move_tail(&se_sess->sess_list, &free_list); |
4673 | } | |
4674 | spin_unlock_bh(&se_tpg->session_lock); | |
e48354ce | 4675 | |
417c20a9 NB |
4676 | list_for_each_entry_safe(se_sess, se_sess_tmp, &free_list, sess_list) { |
4677 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4678 | ||
4679 | iscsit_free_session(sess); | |
e48354ce NB |
4680 | session_count++; |
4681 | } | |
e48354ce NB |
4682 | |
4683 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4684 | " Group: %hu\n", session_count, tpg->tpgt); | |
4685 | return 0; | |
4686 | } | |
4687 | ||
4688 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4689 | MODULE_VERSION("4.1.x"); | |
4690 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4691 | MODULE_LICENSE("GPL"); | |
4692 | ||
4693 | module_init(iscsi_target_init_module); | |
4694 | module_exit(iscsi_target_cleanup_module); |