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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains main functions related to the iSCSI Target Core Driver. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
5 | * |
6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ******************************************************************************/ | |
18 | ||
19 | #include <linux/string.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/crypto.h> | |
22 | #include <linux/completion.h> | |
827509e3 | 23 | #include <linux/module.h> |
40401530 | 24 | #include <linux/idr.h> |
e48354ce | 25 | #include <asm/unaligned.h> |
ba929992 | 26 | #include <scsi/scsi_proto.h> |
e48354ce | 27 | #include <scsi/iscsi_proto.h> |
d28b1169 | 28 | #include <scsi/scsi_tcq.h> |
e48354ce | 29 | #include <target/target_core_base.h> |
c4795fb2 | 30 | #include <target/target_core_fabric.h> |
d28b1169 | 31 | #include <target/target_core_configfs.h> |
e48354ce | 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); |
e48354ce NB |
233 | if ((ret != 0) || signal_pending(current)) |
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( |
e48354ce | 272 | struct __kernel_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; |
e48354ce NB |
279 | u16 port; |
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); | |
291 | } else { | |
292 | sock_in = (struct sockaddr_in *)sockaddr; | |
293 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
294 | ||
295 | if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) | |
296 | ip_match = true; | |
297 | ||
298 | port = ntohs(sock_in->sin_port); | |
299 | } | |
300 | ||
0bcc297e | 301 | if (ip_match && (np->np_port == port) && |
05b96892 NB |
302 | (np->np_network_transport == network_transport)) |
303 | return true; | |
304 | ||
305 | return false; | |
306 | } | |
307 | ||
ee291e63 AG |
308 | /* |
309 | * Called with mutex np_lock held | |
310 | */ | |
05b96892 NB |
311 | static struct iscsi_np *iscsit_get_np( |
312 | struct __kernel_sockaddr_storage *sockaddr, | |
313 | int network_transport) | |
314 | { | |
315 | struct iscsi_np *np; | |
316 | bool match; | |
317 | ||
e48354ce | 318 | list_for_each_entry(np, &g_np_list, np_list) { |
ee291e63 | 319 | spin_lock_bh(&np->np_thread_lock); |
e48354ce | 320 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { |
ee291e63 | 321 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
322 | continue; |
323 | } | |
324 | ||
05b96892 | 325 | match = iscsit_check_np_match(sockaddr, np, network_transport); |
0bcc297e | 326 | if (match) { |
e48354ce NB |
327 | /* |
328 | * Increment the np_exports reference count now to | |
329 | * prevent iscsit_del_np() below from being called | |
330 | * while iscsi_tpg_add_network_portal() is called. | |
331 | */ | |
332 | np->np_exports++; | |
ee291e63 | 333 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
334 | return np; |
335 | } | |
ee291e63 | 336 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce | 337 | } |
e48354ce NB |
338 | |
339 | return NULL; | |
340 | } | |
341 | ||
342 | struct iscsi_np *iscsit_add_np( | |
343 | struct __kernel_sockaddr_storage *sockaddr, | |
344 | char *ip_str, | |
345 | int network_transport) | |
346 | { | |
347 | struct sockaddr_in *sock_in; | |
348 | struct sockaddr_in6 *sock_in6; | |
349 | struct iscsi_np *np; | |
350 | int ret; | |
ee291e63 AG |
351 | |
352 | mutex_lock(&np_lock); | |
353 | ||
e48354ce NB |
354 | /* |
355 | * Locate the existing struct iscsi_np if already active.. | |
356 | */ | |
357 | np = iscsit_get_np(sockaddr, network_transport); | |
ee291e63 AG |
358 | if (np) { |
359 | mutex_unlock(&np_lock); | |
e48354ce | 360 | return np; |
ee291e63 | 361 | } |
e48354ce NB |
362 | |
363 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
364 | if (!np) { | |
365 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
ee291e63 | 366 | mutex_unlock(&np_lock); |
e48354ce NB |
367 | return ERR_PTR(-ENOMEM); |
368 | } | |
369 | ||
370 | np->np_flags |= NPF_IP_NETWORK; | |
371 | if (sockaddr->ss_family == AF_INET6) { | |
372 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
373 | snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); | |
374 | np->np_port = ntohs(sock_in6->sin6_port); | |
375 | } else { | |
376 | sock_in = (struct sockaddr_in *)sockaddr; | |
377 | sprintf(np->np_ip, "%s", ip_str); | |
378 | np->np_port = ntohs(sock_in->sin_port); | |
379 | } | |
380 | ||
381 | np->np_network_transport = network_transport; | |
382 | spin_lock_init(&np->np_thread_lock); | |
383 | init_completion(&np->np_restart_comp); | |
384 | INIT_LIST_HEAD(&np->np_list); | |
385 | ||
386 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
387 | if (ret != 0) { | |
388 | kfree(np); | |
ee291e63 | 389 | mutex_unlock(&np_lock); |
e48354ce NB |
390 | return ERR_PTR(ret); |
391 | } | |
392 | ||
393 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
394 | if (IS_ERR(np->np_thread)) { | |
395 | pr_err("Unable to create kthread: iscsi_np\n"); | |
396 | ret = PTR_ERR(np->np_thread); | |
397 | kfree(np); | |
ee291e63 | 398 | mutex_unlock(&np_lock); |
e48354ce NB |
399 | return ERR_PTR(ret); |
400 | } | |
401 | /* | |
402 | * Increment the np_exports reference count now to prevent | |
403 | * iscsit_del_np() below from being run while a new call to | |
404 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
405 | * active. We don't need to hold np->np_thread_lock at this | |
406 | * point because iscsi_np has not been added to g_np_list yet. | |
407 | */ | |
408 | np->np_exports = 1; | |
ee291e63 | 409 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
e48354ce | 410 | |
e48354ce | 411 | list_add_tail(&np->np_list, &g_np_list); |
ee291e63 | 412 | mutex_unlock(&np_lock); |
e48354ce NB |
413 | |
414 | pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", | |
baa4d64b | 415 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce NB |
416 | |
417 | return np; | |
418 | } | |
419 | ||
420 | int iscsit_reset_np_thread( | |
421 | struct iscsi_np *np, | |
422 | struct iscsi_tpg_np *tpg_np, | |
a91eb7d9 NB |
423 | struct iscsi_portal_group *tpg, |
424 | bool shutdown) | |
e48354ce NB |
425 | { |
426 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
427 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { |
428 | spin_unlock_bh(&np->np_thread_lock); | |
429 | return 0; | |
430 | } | |
431 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
432 | ||
433 | if (np->np_thread) { | |
434 | spin_unlock_bh(&np->np_thread_lock); | |
435 | send_sig(SIGINT, np->np_thread, 1); | |
436 | wait_for_completion(&np->np_restart_comp); | |
437 | spin_lock_bh(&np->np_thread_lock); | |
438 | } | |
439 | spin_unlock_bh(&np->np_thread_lock); | |
440 | ||
a91eb7d9 NB |
441 | if (tpg_np && shutdown) { |
442 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
443 | ||
444 | wait_for_completion(&tpg_np->tpg_np_comp); | |
445 | } | |
446 | ||
e48354ce NB |
447 | return 0; |
448 | } | |
449 | ||
baa4d64b | 450 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 451 | { |
bf6932f4 AV |
452 | if (np->np_socket) |
453 | sock_release(np->np_socket); | |
e48354ce NB |
454 | } |
455 | ||
456 | int iscsit_del_np(struct iscsi_np *np) | |
457 | { | |
458 | spin_lock_bh(&np->np_thread_lock); | |
459 | np->np_exports--; | |
460 | if (np->np_exports) { | |
2363d196 | 461 | np->enabled = true; |
e48354ce NB |
462 | spin_unlock_bh(&np->np_thread_lock); |
463 | return 0; | |
464 | } | |
465 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
466 | spin_unlock_bh(&np->np_thread_lock); | |
467 | ||
468 | if (np->np_thread) { | |
469 | /* | |
470 | * We need to send the signal to wakeup Linux/Net | |
471 | * which may be sleeping in sock_accept().. | |
472 | */ | |
473 | send_sig(SIGINT, np->np_thread, 1); | |
474 | kthread_stop(np->np_thread); | |
db6077fd | 475 | np->np_thread = NULL; |
e48354ce | 476 | } |
baa4d64b NB |
477 | |
478 | np->np_transport->iscsit_free_np(np); | |
e48354ce | 479 | |
ee291e63 | 480 | mutex_lock(&np_lock); |
e48354ce | 481 | list_del(&np->np_list); |
ee291e63 | 482 | mutex_unlock(&np_lock); |
e48354ce NB |
483 | |
484 | pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", | |
baa4d64b | 485 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce | 486 | |
baa4d64b | 487 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
488 | kfree(np); |
489 | return 0; | |
490 | } | |
491 | ||
2ec5a8c1 NB |
492 | static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int); |
493 | static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int); | |
494 | ||
495 | static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
496 | { | |
497 | iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); | |
498 | return 0; | |
499 | } | |
500 | ||
131e6abc NB |
501 | static void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
502 | { | |
503 | bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD); | |
504 | ||
505 | spin_lock_bh(&conn->cmd_lock); | |
506 | if (!list_empty(&cmd->i_conn_node)) | |
507 | list_del_init(&cmd->i_conn_node); | |
508 | spin_unlock_bh(&conn->cmd_lock); | |
509 | ||
510 | __iscsit_free_cmd(cmd, scsi_cmd, true); | |
511 | } | |
512 | ||
e70beee7 NB |
513 | static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn) |
514 | { | |
515 | return TARGET_PROT_NORMAL; | |
516 | } | |
517 | ||
baa4d64b NB |
518 | static struct iscsit_transport iscsi_target_transport = { |
519 | .name = "iSCSI/TCP", | |
520 | .transport_type = ISCSI_TCP, | |
521 | .owner = NULL, | |
522 | .iscsit_setup_np = iscsit_setup_np, | |
523 | .iscsit_accept_np = iscsit_accept_np, | |
524 | .iscsit_free_np = iscsit_free_np, | |
525 | .iscsit_get_login_rx = iscsit_get_login_rx, | |
526 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 527 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
528 | .iscsit_immediate_queue = iscsit_immediate_queue, |
529 | .iscsit_response_queue = iscsit_response_queue, | |
530 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
531 | .iscsit_queue_status = iscsit_queue_rsp, | |
131e6abc | 532 | .iscsit_aborted_task = iscsit_aborted_task, |
e70beee7 | 533 | .iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops, |
baa4d64b NB |
534 | }; |
535 | ||
e48354ce NB |
536 | static int __init iscsi_target_init_module(void) |
537 | { | |
88dcd2da | 538 | int ret = 0, size; |
e48354ce NB |
539 | |
540 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
541 | ||
542 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
543 | if (!iscsit_global) { | |
544 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
545 | return -1; | |
546 | } | |
88dcd2da | 547 | spin_lock_init(&iscsit_global->ts_bitmap_lock); |
e48354ce NB |
548 | mutex_init(&auth_id_lock); |
549 | spin_lock_init(&sess_idr_lock); | |
550 | idr_init(&tiqn_idr); | |
551 | idr_init(&sess_idr); | |
552 | ||
9ac8928e CH |
553 | ret = target_register_template(&iscsi_ops); |
554 | if (ret) | |
e48354ce NB |
555 | goto out; |
556 | ||
88dcd2da NB |
557 | size = BITS_TO_LONGS(ISCSIT_BITMAP_BITS) * sizeof(long); |
558 | iscsit_global->ts_bitmap = vzalloc(size); | |
559 | if (!iscsit_global->ts_bitmap) { | |
560 | pr_err("Unable to allocate iscsit_global->ts_bitmap\n"); | |
e48354ce | 561 | goto configfs_out; |
e48354ce NB |
562 | } |
563 | ||
e48354ce NB |
564 | lio_qr_cache = kmem_cache_create("lio_qr_cache", |
565 | sizeof(struct iscsi_queue_req), | |
566 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
567 | if (!lio_qr_cache) { | |
568 | pr_err("nable to kmem_cache_create() for" | |
569 | " lio_qr_cache\n"); | |
88dcd2da | 570 | goto bitmap_out; |
e48354ce NB |
571 | } |
572 | ||
573 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
574 | sizeof(struct iscsi_datain_req), | |
575 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
576 | if (!lio_dr_cache) { | |
577 | pr_err("Unable to kmem_cache_create() for" | |
578 | " lio_dr_cache\n"); | |
579 | goto qr_out; | |
580 | } | |
581 | ||
582 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
583 | sizeof(struct iscsi_ooo_cmdsn), | |
584 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
585 | if (!lio_ooo_cache) { | |
586 | pr_err("Unable to kmem_cache_create() for" | |
587 | " lio_ooo_cache\n"); | |
588 | goto dr_out; | |
589 | } | |
590 | ||
591 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
592 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
593 | 0, NULL); | |
594 | if (!lio_r2t_cache) { | |
595 | pr_err("Unable to kmem_cache_create() for" | |
596 | " lio_r2t_cache\n"); | |
597 | goto ooo_out; | |
598 | } | |
599 | ||
baa4d64b NB |
600 | iscsit_register_transport(&iscsi_target_transport); |
601 | ||
e48354ce NB |
602 | if (iscsit_load_discovery_tpg() < 0) |
603 | goto r2t_out; | |
604 | ||
605 | return ret; | |
606 | r2t_out: | |
7f2c53bb | 607 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
608 | kmem_cache_destroy(lio_r2t_cache); |
609 | ooo_out: | |
610 | kmem_cache_destroy(lio_ooo_cache); | |
611 | dr_out: | |
612 | kmem_cache_destroy(lio_dr_cache); | |
613 | qr_out: | |
614 | kmem_cache_destroy(lio_qr_cache); | |
88dcd2da NB |
615 | bitmap_out: |
616 | vfree(iscsit_global->ts_bitmap); | |
e48354ce | 617 | configfs_out: |
9ac8928e CH |
618 | /* XXX: this probably wants it to be it's own unwind step.. */ |
619 | if (iscsit_global->discovery_tpg) | |
620 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
621 | target_unregister_template(&iscsi_ops); | |
e48354ce NB |
622 | out: |
623 | kfree(iscsit_global); | |
624 | return -ENOMEM; | |
625 | } | |
626 | ||
627 | static void __exit iscsi_target_cleanup_module(void) | |
628 | { | |
e48354ce | 629 | iscsit_release_discovery_tpg(); |
baa4d64b | 630 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
631 | kmem_cache_destroy(lio_qr_cache); |
632 | kmem_cache_destroy(lio_dr_cache); | |
633 | kmem_cache_destroy(lio_ooo_cache); | |
634 | kmem_cache_destroy(lio_r2t_cache); | |
635 | ||
9ac8928e CH |
636 | /* |
637 | * Shutdown discovery sessions and disable discovery TPG | |
638 | */ | |
639 | if (iscsit_global->discovery_tpg) | |
640 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
e48354ce | 641 | |
9ac8928e | 642 | target_unregister_template(&iscsi_ops); |
e48354ce | 643 | |
88dcd2da | 644 | vfree(iscsit_global->ts_bitmap); |
e48354ce NB |
645 | kfree(iscsit_global); |
646 | } | |
647 | ||
8b1e1244 | 648 | static int iscsit_add_reject( |
ba159914 | 649 | struct iscsi_conn *conn, |
e48354ce | 650 | u8 reason, |
ba159914 | 651 | unsigned char *buf) |
e48354ce NB |
652 | { |
653 | struct iscsi_cmd *cmd; | |
e48354ce | 654 | |
676687c6 | 655 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
e48354ce NB |
656 | if (!cmd) |
657 | return -1; | |
658 | ||
659 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 660 | cmd->reject_reason = reason; |
e48354ce | 661 | |
1c3d5794 | 662 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
663 | if (!cmd->buf_ptr) { |
664 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 665 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
666 | return -1; |
667 | } | |
e48354ce NB |
668 | |
669 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 670 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
671 | spin_unlock_bh(&conn->cmd_lock); |
672 | ||
673 | cmd->i_state = ISTATE_SEND_REJECT; | |
674 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
675 | ||
ba159914 | 676 | return -1; |
e48354ce NB |
677 | } |
678 | ||
ba159914 NB |
679 | static int iscsit_add_reject_from_cmd( |
680 | struct iscsi_cmd *cmd, | |
e48354ce | 681 | u8 reason, |
ba159914 NB |
682 | bool add_to_conn, |
683 | unsigned char *buf) | |
e48354ce NB |
684 | { |
685 | struct iscsi_conn *conn; | |
e48354ce NB |
686 | |
687 | if (!cmd->conn) { | |
688 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
689 | cmd->init_task_tag); | |
690 | return -1; | |
691 | } | |
692 | conn = cmd->conn; | |
693 | ||
694 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 695 | cmd->reject_reason = reason; |
e48354ce | 696 | |
1c3d5794 | 697 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
698 | if (!cmd->buf_ptr) { |
699 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 700 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
701 | return -1; |
702 | } | |
e48354ce NB |
703 | |
704 | if (add_to_conn) { | |
705 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 706 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
707 | spin_unlock_bh(&conn->cmd_lock); |
708 | } | |
709 | ||
710 | cmd->i_state = ISTATE_SEND_REJECT; | |
711 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
3e1c81a9 NB |
712 | /* |
713 | * Perform the kref_put now if se_cmd has already been setup by | |
714 | * scsit_setup_scsi_cmd() | |
715 | */ | |
716 | if (cmd->se_cmd.se_tfo != NULL) { | |
717 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); | |
718 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
719 | } | |
ba159914 NB |
720 | return -1; |
721 | } | |
e48354ce | 722 | |
ba159914 NB |
723 | static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, |
724 | unsigned char *buf) | |
725 | { | |
726 | return iscsit_add_reject_from_cmd(cmd, reason, true, buf); | |
727 | } | |
728 | ||
729 | int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) | |
730 | { | |
731 | return iscsit_add_reject_from_cmd(cmd, reason, false, buf); | |
e48354ce NB |
732 | } |
733 | ||
734 | /* | |
735 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 736 | * kernel sockets to copy data in/out. |
e48354ce NB |
737 | */ |
738 | static int iscsit_map_iovec( | |
739 | struct iscsi_cmd *cmd, | |
740 | struct kvec *iov, | |
741 | u32 data_offset, | |
742 | u32 data_length) | |
743 | { | |
744 | u32 i = 0; | |
745 | struct scatterlist *sg; | |
746 | unsigned int page_off; | |
747 | ||
748 | /* | |
bfb79eac | 749 | * We know each entry in t_data_sg contains a page. |
e48354ce | 750 | */ |
bfb79eac | 751 | sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; |
e48354ce NB |
752 | page_off = (data_offset % PAGE_SIZE); |
753 | ||
754 | cmd->first_data_sg = sg; | |
755 | cmd->first_data_sg_off = page_off; | |
756 | ||
757 | while (data_length) { | |
758 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
759 | ||
760 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
761 | iov[i].iov_len = cur_len; | |
762 | ||
763 | data_length -= cur_len; | |
764 | page_off = 0; | |
765 | sg = sg_next(sg); | |
766 | i++; | |
767 | } | |
768 | ||
769 | cmd->kmapped_nents = i; | |
770 | ||
771 | return i; | |
772 | } | |
773 | ||
774 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
775 | { | |
776 | u32 i; | |
777 | struct scatterlist *sg; | |
778 | ||
779 | sg = cmd->first_data_sg; | |
780 | ||
781 | for (i = 0; i < cmd->kmapped_nents; i++) | |
782 | kunmap(sg_page(&sg[i])); | |
783 | } | |
784 | ||
785 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
786 | { | |
f56cbbb4 NB |
787 | LIST_HEAD(ack_list); |
788 | struct iscsi_cmd *cmd, *cmd_p; | |
e48354ce NB |
789 | |
790 | conn->exp_statsn = exp_statsn; | |
791 | ||
3e1c81a9 NB |
792 | if (conn->sess->sess_ops->RDMAExtensions) |
793 | return; | |
794 | ||
e48354ce | 795 | spin_lock_bh(&conn->cmd_lock); |
f56cbbb4 | 796 | list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
797 | spin_lock(&cmd->istate_lock); |
798 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 799 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
800 | cmd->i_state = ISTATE_REMOVE; |
801 | spin_unlock(&cmd->istate_lock); | |
f56cbbb4 | 802 | list_move_tail(&cmd->i_conn_node, &ack_list); |
e48354ce NB |
803 | continue; |
804 | } | |
805 | spin_unlock(&cmd->istate_lock); | |
806 | } | |
807 | spin_unlock_bh(&conn->cmd_lock); | |
f56cbbb4 NB |
808 | |
809 | list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { | |
5159d763 | 810 | list_del_init(&cmd->i_conn_node); |
f56cbbb4 NB |
811 | iscsit_free_cmd(cmd, false); |
812 | } | |
e48354ce NB |
813 | } |
814 | ||
815 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
816 | { | |
f80e8ed3 | 817 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 818 | |
c0427f15 | 819 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
820 | |
821 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
822 | if (!cmd->iov_data) { | |
823 | pr_err("Unable to allocate cmd->iov_data\n"); | |
824 | return -ENOMEM; | |
825 | } | |
826 | ||
827 | cmd->orig_iov_data_count = iov_count; | |
828 | return 0; | |
829 | } | |
830 | ||
3e1c81a9 NB |
831 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
832 | unsigned char *buf) | |
e48354ce | 833 | { |
3e1c81a9 | 834 | int data_direction, payload_length; |
e48354ce | 835 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
836 | int iscsi_task_attr; |
837 | int sam_task_attr; | |
e48354ce | 838 | |
04f3b31b | 839 | atomic_long_inc(&conn->sess->cmd_pdus); |
e48354ce NB |
840 | |
841 | hdr = (struct iscsi_scsi_req *) buf; | |
842 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
843 | |
844 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
845 | ||
846 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
847 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
848 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
849 | " not set. Bad iSCSI Initiator.\n"); | |
ba159914 NB |
850 | return iscsit_add_reject_cmd(cmd, |
851 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
852 | } |
853 | ||
854 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
855 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
856 | /* | |
4454b66c NB |
857 | * From RFC-3720 Section 10.3.1: |
858 | * | |
859 | * "Either or both of R and W MAY be 1 when either the | |
860 | * Expected Data Transfer Length and/or Bidirectional Read | |
861 | * Expected Data Transfer Length are 0" | |
862 | * | |
863 | * For this case, go ahead and clear the unnecssary bits | |
864 | * to avoid any confusion with ->data_direction. | |
e48354ce | 865 | */ |
4454b66c NB |
866 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; |
867 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
e48354ce | 868 | |
4454b66c | 869 | pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" |
e48354ce | 870 | " set when Expected Data Transfer Length is 0 for" |
4454b66c | 871 | " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); |
e48354ce | 872 | } |
e48354ce NB |
873 | |
874 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
875 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
876 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
877 | " MUST be set if Expected Data Transfer Length is not 0." | |
878 | " Bad iSCSI Initiator\n"); | |
ba159914 NB |
879 | return iscsit_add_reject_cmd(cmd, |
880 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
881 | } |
882 | ||
883 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
884 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
885 | pr_err("Bidirectional operations not supported!\n"); | |
ba159914 NB |
886 | return iscsit_add_reject_cmd(cmd, |
887 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
888 | } |
889 | ||
890 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
891 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
892 | " Scsi Command PDU.\n"); | |
ba159914 NB |
893 | return iscsit_add_reject_cmd(cmd, |
894 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
895 | } |
896 | ||
897 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
898 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
899 | " protocol error.\n", payload_length); | |
ba159914 NB |
900 | return iscsit_add_reject_cmd(cmd, |
901 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
902 | } |
903 | ||
ba159914 | 904 | if ((be32_to_cpu(hdr->data_length) == payload_length) && |
e48354ce NB |
905 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
906 | pr_err("Expected Data Transfer Length and Length of" | |
907 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
908 | " bit is not set protocol error\n"); | |
ba159914 NB |
909 | return iscsit_add_reject_cmd(cmd, |
910 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
911 | } |
912 | ||
50e5c87d | 913 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
914 | pr_err("DataSegmentLength: %u is greater than" |
915 | " EDTL: %u, protocol error.\n", payload_length, | |
916 | hdr->data_length); | |
ba159914 NB |
917 | return iscsit_add_reject_cmd(cmd, |
918 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
919 | } |
920 | ||
21f5aa7e | 921 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 922 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
923 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
924 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
925 | return iscsit_add_reject_cmd(cmd, |
926 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
927 | } |
928 | ||
929 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
930 | pr_err("DataSegmentLength: %u is greater than" | |
931 | " FirstBurstLength: %u, protocol error.\n", | |
932 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
ba159914 NB |
933 | return iscsit_add_reject_cmd(cmd, |
934 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
935 | } |
936 | ||
937 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
938 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
939 | DMA_NONE; | |
940 | ||
d28b1169 | 941 | cmd->data_direction = data_direction; |
d28b1169 AG |
942 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
943 | /* | |
944 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
945 | */ | |
946 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
947 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
68d81f40 | 948 | sam_task_attr = TCM_SIMPLE_TAG; |
d28b1169 | 949 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) |
68d81f40 | 950 | sam_task_attr = TCM_ORDERED_TAG; |
d28b1169 | 951 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) |
68d81f40 | 952 | sam_task_attr = TCM_HEAD_TAG; |
d28b1169 | 953 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) |
68d81f40 | 954 | sam_task_attr = TCM_ACA_TAG; |
d28b1169 AG |
955 | else { |
956 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
68d81f40 CH |
957 | " TCM_SIMPLE_TAG\n", iscsi_task_attr); |
958 | sam_task_attr = TCM_SIMPLE_TAG; | |
d28b1169 AG |
959 | } |
960 | ||
e48354ce NB |
961 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
962 | cmd->i_state = ISTATE_NEW_CMD; | |
963 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
964 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
965 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
966 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
967 | if (cmd->unsolicited_data) | |
968 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
969 | ||
970 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
971 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { | |
c1e34b64 | 972 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); |
e48354ce NB |
973 | } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) |
974 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
975 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
976 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
977 | cmd->first_burst_len = payload_length; |
978 | ||
3e1c81a9 NB |
979 | if (!conn->sess->sess_ops->RDMAExtensions && |
980 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
981 | struct iscsi_datain_req *dr; |
982 | ||
983 | dr = iscsit_allocate_datain_req(); | |
984 | if (!dr) | |
ba159914 NB |
985 | return iscsit_add_reject_cmd(cmd, |
986 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
987 | |
988 | iscsit_attach_datain_req(cmd, dr); | |
989 | } | |
990 | ||
065ca1e4 AG |
991 | /* |
992 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
993 | */ | |
9ac8928e | 994 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
50e5c87d CH |
995 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
996 | cmd->data_direction, sam_task_attr, | |
997 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
998 | |
999 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
1000 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
1001 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
1002 | conn->cid); | |
1003 | ||
1004 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); | |
065ca1e4 | 1005 | |
de103c93 CH |
1006 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
1007 | scsilun_to_int(&hdr->lun)); | |
1008 | if (cmd->sense_reason) | |
1009 | goto attach_cmd; | |
1010 | ||
1011 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); | |
1012 | if (cmd->sense_reason) { | |
1013 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
ba159914 NB |
1014 | return iscsit_add_reject_cmd(cmd, |
1015 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce | 1016 | } |
de103c93 | 1017 | |
e48354ce NB |
1018 | goto attach_cmd; |
1019 | } | |
a12f41f8 | 1020 | |
de103c93 | 1021 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
ba159914 NB |
1022 | return iscsit_add_reject_cmd(cmd, |
1023 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1024 | } |
1025 | ||
1026 | attach_cmd: | |
1027 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1028 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1029 | spin_unlock_bh(&conn->cmd_lock); |
1030 | /* | |
1031 | * Check if we need to delay processing because of ALUA | |
1032 | * Active/NonOptimized primary access state.. | |
1033 | */ | |
1034 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1035 | |
3e1c81a9 NB |
1036 | return 0; |
1037 | } | |
1038 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1039 | |
3e1c81a9 NB |
1040 | void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) |
1041 | { | |
1042 | iscsit_set_dataout_sequence_values(cmd); | |
1043 | ||
1044 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1045 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1046 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1047 | } | |
1048 | EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); | |
1049 | ||
1050 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1051 | struct iscsi_scsi_req *hdr) | |
1052 | { | |
1053 | int cmdsn_ret = 0; | |
e48354ce NB |
1054 | /* |
1055 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1056 | * the Immediate Bit is not set, and no Immediate | |
1057 | * Data is attached. | |
1058 | * | |
1059 | * A PDU/CmdSN carrying Immediate Data can only | |
1060 | * be processed after the DataCRC has passed. | |
1061 | * If the DataCRC fails, the CmdSN MUST NOT | |
1062 | * be acknowledged. (See below) | |
1063 | */ | |
1064 | if (!cmd->immediate_data) { | |
561bf158 NB |
1065 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1066 | (unsigned char *)hdr, hdr->cmdsn); | |
1067 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1068 | return -1; | |
1069 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
3e1c81a9 | 1070 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
7e32da55 | 1071 | return 0; |
3e1c81a9 | 1072 | } |
e48354ce NB |
1073 | } |
1074 | ||
50e5c87d | 1075 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1076 | |
1077 | /* | |
1078 | * If no Immediate Data is attached, it's OK to return now. | |
1079 | */ | |
1080 | if (!cmd->immediate_data) { | |
3e1c81a9 NB |
1081 | if (!cmd->sense_reason && cmd->unsolicited_data) |
1082 | iscsit_set_unsoliticed_dataout(cmd); | |
1083 | if (!cmd->sense_reason) | |
1084 | return 0; | |
e48354ce | 1085 | |
3e1c81a9 | 1086 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
e48354ce NB |
1087 | return 0; |
1088 | } | |
1089 | ||
1090 | /* | |
3e1c81a9 NB |
1091 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1092 | * execution. These exceptions are processed in CmdSN order using | |
1093 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1094 | */ |
de103c93 | 1095 | if (cmd->sense_reason) { |
561bf158 NB |
1096 | if (cmd->reject_reason) |
1097 | return 0; | |
1098 | ||
3e1c81a9 | 1099 | return 1; |
e48354ce NB |
1100 | } |
1101 | /* | |
1102 | * Call directly into transport_generic_new_cmd() to perform | |
1103 | * the backend memory allocation. | |
1104 | */ | |
de103c93 | 1105 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
561bf158 | 1106 | if (cmd->sense_reason) |
3e1c81a9 | 1107 | return 1; |
e48354ce | 1108 | |
3e1c81a9 NB |
1109 | return 0; |
1110 | } | |
1111 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1112 | ||
1113 | static int | |
1114 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1115 | bool dump_payload) | |
1116 | { | |
561bf158 | 1117 | struct iscsi_conn *conn = cmd->conn; |
3e1c81a9 NB |
1118 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; |
1119 | /* | |
1120 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1121 | */ | |
0bcc297e | 1122 | if (dump_payload) |
3e1c81a9 NB |
1123 | goto after_immediate_data; |
1124 | ||
1125 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1126 | cmd->first_burst_len); | |
e48354ce NB |
1127 | after_immediate_data: |
1128 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1129 | /* | |
1130 | * A PDU/CmdSN carrying Immediate Data passed | |
1131 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1132 | * Immediate Bit is not set. | |
1133 | */ | |
561bf158 NB |
1134 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, |
1135 | (unsigned char *)hdr, hdr->cmdsn); | |
9d86a2be | 1136 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
561bf158 | 1137 | return -1; |
3e1c81a9 | 1138 | |
9d86a2be | 1139 | if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
561bf158 NB |
1140 | int rc; |
1141 | ||
1142 | rc = iscsit_dump_data_payload(cmd->conn, | |
1143 | cmd->first_burst_len, 1); | |
1144 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
1145 | return rc; | |
3e1c81a9 NB |
1146 | } else if (cmd->unsolicited_data) |
1147 | iscsit_set_unsoliticed_dataout(cmd); | |
e48354ce | 1148 | |
e48354ce NB |
1149 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { |
1150 | /* | |
1151 | * Immediate Data failed DataCRC and ERL>=1, | |
1152 | * silently drop this PDU and let the initiator | |
1153 | * plug the CmdSN gap. | |
1154 | * | |
1155 | * FIXME: Send Unsolicited NOPIN with reserved | |
1156 | * TTT here to help the initiator figure out | |
1157 | * the missing CmdSN, although they should be | |
1158 | * intelligent enough to determine the missing | |
1159 | * CmdSN and issue a retry to plug the sequence. | |
1160 | */ | |
1161 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1162 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1163 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1164 | return -1; | |
1165 | ||
1166 | return 0; | |
1167 | } | |
1168 | ||
3e1c81a9 NB |
1169 | static int |
1170 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1171 | unsigned char *buf) | |
1172 | { | |
1173 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1174 | int rc, immed_data; | |
1175 | bool dump_payload = false; | |
1176 | ||
1177 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1178 | if (rc < 0) | |
561bf158 | 1179 | return 0; |
3e1c81a9 NB |
1180 | /* |
1181 | * Allocation iovecs needed for struct socket operations for | |
1182 | * traditional iSCSI block I/O. | |
1183 | */ | |
1184 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
b815fc12 | 1185 | return iscsit_reject_cmd(cmd, |
ba159914 | 1186 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); |
3e1c81a9 NB |
1187 | } |
1188 | immed_data = cmd->immediate_data; | |
1189 | ||
1190 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1191 | if (rc < 0) | |
1192 | return rc; | |
1193 | else if (rc > 0) | |
1194 | dump_payload = true; | |
1195 | ||
1196 | if (!immed_data) | |
1197 | return 0; | |
1198 | ||
1199 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1200 | } | |
1201 | ||
e48354ce NB |
1202 | static u32 iscsit_do_crypto_hash_sg( |
1203 | struct hash_desc *hash, | |
1204 | struct iscsi_cmd *cmd, | |
1205 | u32 data_offset, | |
1206 | u32 data_length, | |
1207 | u32 padding, | |
1208 | u8 *pad_bytes) | |
1209 | { | |
1210 | u32 data_crc; | |
1211 | u32 i; | |
1212 | struct scatterlist *sg; | |
1213 | unsigned int page_off; | |
1214 | ||
1215 | crypto_hash_init(hash); | |
1216 | ||
1217 | sg = cmd->first_data_sg; | |
1218 | page_off = cmd->first_data_sg_off; | |
1219 | ||
1220 | i = 0; | |
1221 | while (data_length) { | |
1222 | u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); | |
1223 | ||
1224 | crypto_hash_update(hash, &sg[i], cur_len); | |
1225 | ||
1226 | data_length -= cur_len; | |
1227 | page_off = 0; | |
1228 | i++; | |
1229 | } | |
1230 | ||
1231 | if (padding) { | |
1232 | struct scatterlist pad_sg; | |
1233 | ||
1234 | sg_init_one(&pad_sg, pad_bytes, padding); | |
1235 | crypto_hash_update(hash, &pad_sg, padding); | |
1236 | } | |
1237 | crypto_hash_final(hash, (u8 *) &data_crc); | |
1238 | ||
1239 | return data_crc; | |
1240 | } | |
1241 | ||
1242 | static void iscsit_do_crypto_hash_buf( | |
1243 | struct hash_desc *hash, | |
80690fdb | 1244 | const void *buf, |
e48354ce NB |
1245 | u32 payload_length, |
1246 | u32 padding, | |
1247 | u8 *pad_bytes, | |
1248 | u8 *data_crc) | |
1249 | { | |
1250 | struct scatterlist sg; | |
1251 | ||
1252 | crypto_hash_init(hash); | |
1253 | ||
8359cf43 | 1254 | sg_init_one(&sg, buf, payload_length); |
e48354ce NB |
1255 | crypto_hash_update(hash, &sg, payload_length); |
1256 | ||
1257 | if (padding) { | |
1258 | sg_init_one(&sg, pad_bytes, padding); | |
1259 | crypto_hash_update(hash, &sg, padding); | |
1260 | } | |
1261 | crypto_hash_final(hash, data_crc); | |
1262 | } | |
1263 | ||
3e1c81a9 NB |
1264 | int |
1265 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, | |
1266 | struct iscsi_cmd **out_cmd) | |
e48354ce | 1267 | { |
3e1c81a9 | 1268 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
e48354ce NB |
1269 | struct iscsi_cmd *cmd = NULL; |
1270 | struct se_cmd *se_cmd; | |
3e1c81a9 NB |
1271 | u32 payload_length = ntoh24(hdr->dlength); |
1272 | int rc; | |
e48354ce NB |
1273 | |
1274 | if (!payload_length) { | |
dbcbc95c NB |
1275 | pr_warn("DataOUT payload is ZERO, ignoring.\n"); |
1276 | return 0; | |
e48354ce NB |
1277 | } |
1278 | ||
1279 | /* iSCSI write */ | |
04f3b31b | 1280 | atomic_long_add(payload_length, &conn->sess->rx_data_octets); |
e48354ce | 1281 | |
21f5aa7e | 1282 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1283 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1284 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1285 | conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1286 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
1287 | buf); | |
e48354ce NB |
1288 | } |
1289 | ||
1290 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1291 | payload_length); | |
1292 | if (!cmd) | |
1293 | return 0; | |
1294 | ||
1295 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1296 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1297 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1298 | payload_length, conn->cid); |
1299 | ||
1300 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1301 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1302 | " last DataOUT received, dumping payload\n", | |
1303 | cmd->init_task_tag); | |
1304 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1305 | } | |
1306 | ||
1307 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1308 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1309 | " NON-WRITE command.\n", cmd->init_task_tag); | |
97c99b47 | 1310 | return iscsit_dump_data_payload(conn, payload_length, 1); |
e48354ce NB |
1311 | } |
1312 | se_cmd = &cmd->se_cmd; | |
1313 | iscsit_mod_dataout_timer(cmd); | |
1314 | ||
50e5c87d | 1315 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1316 | pr_err("DataOut Offset: %u, Length %u greater than" |
1317 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1318 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
ba159914 | 1319 | return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); |
e48354ce NB |
1320 | } |
1321 | ||
1322 | if (cmd->unsolicited_data) { | |
1323 | int dump_unsolicited_data = 0; | |
1324 | ||
1325 | if (conn->sess->sess_ops->InitialR2T) { | |
1326 | pr_err("Received unexpected unsolicited data" | |
1327 | " while InitialR2T=Yes, protocol error.\n"); | |
1328 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1329 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1330 | return -1; | |
1331 | } | |
1332 | /* | |
1333 | * Special case for dealing with Unsolicited DataOUT | |
1334 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1335 | * failures; | |
1336 | */ | |
1337 | ||
1338 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
e48354ce | 1339 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); |
de103c93 | 1340 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce | 1341 | dump_unsolicited_data = 1; |
e48354ce NB |
1342 | |
1343 | if (dump_unsolicited_data) { | |
1344 | /* | |
1345 | * Check if a delayed TASK_ABORTED status needs to | |
1346 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
1347 | * received with the unsolicitied data out. | |
1348 | */ | |
1349 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1350 | iscsit_stop_dataout_timer(cmd); | |
1351 | ||
1352 | transport_check_aborted_status(se_cmd, | |
1353 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1354 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1355 | } | |
1356 | } else { | |
1357 | /* | |
1358 | * For the normal solicited data path: | |
1359 | * | |
1360 | * Check for a delayed TASK_ABORTED status and dump any | |
1361 | * incoming data out payload if one exists. Also, when the | |
1362 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1363 | * data out sequence, we decrement outstanding_r2ts. Once | |
1364 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1365 | * TASK_ABORTED status. | |
1366 | */ | |
7d680f3b | 1367 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1368 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1369 | if (--cmd->outstanding_r2ts < 1) { | |
1370 | iscsit_stop_dataout_timer(cmd); | |
1371 | transport_check_aborted_status( | |
1372 | se_cmd, 1); | |
1373 | } | |
1374 | ||
1375 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1376 | } | |
1377 | } | |
1378 | /* | |
1379 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1380 | * within-command recovery checks before receiving the payload. | |
1381 | */ | |
3e1c81a9 NB |
1382 | rc = iscsit_check_pre_dataout(cmd, buf); |
1383 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1384 | return 0; |
3e1c81a9 | 1385 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce NB |
1386 | return -1; |
1387 | ||
3e1c81a9 NB |
1388 | *out_cmd = cmd; |
1389 | return 0; | |
1390 | } | |
1391 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); | |
1392 | ||
1393 | static int | |
1394 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1395 | struct iscsi_data *hdr) | |
1396 | { | |
1397 | struct kvec *iov; | |
1398 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1399 | u32 payload_length = ntoh24(hdr->dlength); | |
1400 | int iov_ret, data_crc_failed = 0; | |
1401 | ||
e48354ce NB |
1402 | rx_size += payload_length; |
1403 | iov = &cmd->iov_data[0]; | |
1404 | ||
50e5c87d CH |
1405 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1406 | payload_length); | |
e48354ce NB |
1407 | if (iov_ret < 0) |
1408 | return -1; | |
1409 | ||
1410 | iov_count += iov_ret; | |
1411 | ||
1412 | padding = ((-payload_length) & 3); | |
1413 | if (padding != 0) { | |
1414 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1415 | iov[iov_count++].iov_len = padding; | |
1416 | rx_size += padding; | |
1417 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1418 | } | |
1419 | ||
1420 | if (conn->conn_ops->DataDigest) { | |
1421 | iov[iov_count].iov_base = &checksum; | |
1422 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1423 | rx_size += ISCSI_CRC_LEN; | |
1424 | } | |
1425 | ||
1426 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1427 | ||
1428 | iscsit_unmap_iovec(cmd); | |
1429 | ||
1430 | if (rx_got != rx_size) | |
1431 | return -1; | |
1432 | ||
1433 | if (conn->conn_ops->DataDigest) { | |
1434 | u32 data_crc; | |
1435 | ||
1436 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
50e5c87d CH |
1437 | be32_to_cpu(hdr->offset), |
1438 | payload_length, padding, | |
e48354ce NB |
1439 | cmd->pad_bytes); |
1440 | ||
1441 | if (checksum != data_crc) { | |
1442 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1443 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1444 | " does not match computed 0x%08x\n", | |
1445 | hdr->itt, hdr->offset, payload_length, | |
1446 | hdr->datasn, checksum, data_crc); | |
1447 | data_crc_failed = 1; | |
1448 | } else { | |
1449 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1450 | " %u bytes of Data Out\n", checksum, | |
1451 | payload_length); | |
1452 | } | |
1453 | } | |
3e1c81a9 NB |
1454 | |
1455 | return data_crc_failed; | |
1456 | } | |
1457 | ||
1458 | int | |
1459 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1460 | bool data_crc_failed) | |
1461 | { | |
1462 | struct iscsi_conn *conn = cmd->conn; | |
1463 | int rc, ooo_cmdsn; | |
e48354ce NB |
1464 | /* |
1465 | * Increment post receive data and CRC values or perform | |
1466 | * within-command recovery. | |
1467 | */ | |
3e1c81a9 NB |
1468 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1469 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1470 | return 0; |
3e1c81a9 | 1471 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1472 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1473 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1474 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1475 | /* |
1476 | * Handle extra special case for out of order | |
1477 | * Unsolicited Data Out. | |
1478 | */ | |
1479 | spin_lock_bh(&cmd->istate_lock); | |
1480 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1481 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1482 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1483 | spin_unlock_bh(&cmd->istate_lock); | |
1484 | ||
1485 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1486 | if (ooo_cmdsn) |
1487 | return 0; | |
1488 | target_execute_cmd(&cmd->se_cmd); | |
1489 | return 0; | |
e48354ce NB |
1490 | } else /* DATAOUT_CANNOT_RECOVER */ |
1491 | return -1; | |
1492 | ||
1493 | return 0; | |
1494 | } | |
3e1c81a9 | 1495 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1496 | |
3e1c81a9 NB |
1497 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1498 | { | |
dbcbc95c | 1499 | struct iscsi_cmd *cmd = NULL; |
3e1c81a9 NB |
1500 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1501 | int rc; | |
1502 | bool data_crc_failed = false; | |
1503 | ||
1504 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1505 | if (rc < 0) | |
561bf158 | 1506 | return 0; |
3e1c81a9 NB |
1507 | else if (!cmd) |
1508 | return 0; | |
1509 | ||
1510 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1511 | if (rc < 0) | |
1512 | return rc; | |
1513 | else if (rc > 0) | |
1514 | data_crc_failed = true; | |
1515 | ||
1516 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1517 | } | |
1518 | ||
778de368 NB |
1519 | int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
1520 | struct iscsi_nopout *hdr) | |
e48354ce | 1521 | { |
778de368 | 1522 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1523 | |
a3662605 AH |
1524 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { |
1525 | pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n"); | |
1526 | if (!cmd) | |
1527 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1528 | (unsigned char *)hdr); | |
1529 | ||
1530 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, | |
1531 | (unsigned char *)hdr); | |
1532 | } | |
1533 | ||
66c7db68 | 1534 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1535 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1536 | " not set, protocol error.\n"); | |
28aaa950 NB |
1537 | if (!cmd) |
1538 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1539 | (unsigned char *)hdr); | |
1540 | ||
ba159914 NB |
1541 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1542 | (unsigned char *)hdr); | |
e48354ce NB |
1543 | } |
1544 | ||
21f5aa7e | 1545 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1546 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1547 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1548 | " error.\n", payload_length, |
21f5aa7e | 1549 | conn->conn_ops->MaxXmitDataSegmentLength); |
28aaa950 NB |
1550 | if (!cmd) |
1551 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1552 | (unsigned char *)hdr); | |
1553 | ||
ba159914 NB |
1554 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1555 | (unsigned char *)hdr); | |
e48354ce NB |
1556 | } |
1557 | ||
3e1c81a9 | 1558 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1559 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1560 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1561 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1562 | payload_length); | |
1563 | /* | |
1564 | * This is not a response to a Unsolicited NopIN, which means | |
1565 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1566 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1567 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1568 | * can contain ping data. | |
1569 | */ | |
50e5c87d | 1570 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1571 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; |
1572 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1573 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1574 | 1 : 0); | |
1575 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1576 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1577 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1578 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1579 | cmd->data_direction = DMA_NONE; |
1580 | } | |
1581 | ||
778de368 NB |
1582 | return 0; |
1583 | } | |
1584 | EXPORT_SYMBOL(iscsit_setup_nop_out); | |
1585 | ||
1586 | int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1587 | struct iscsi_nopout *hdr) | |
1588 | { | |
1589 | struct iscsi_cmd *cmd_p = NULL; | |
1590 | int cmdsn_ret = 0; | |
1591 | /* | |
1592 | * Initiator is expecting a NopIN ping reply.. | |
1593 | */ | |
1594 | if (hdr->itt != RESERVED_ITT) { | |
7cbfcc95 NB |
1595 | if (!cmd) |
1596 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1597 | (unsigned char *)hdr); | |
778de368 NB |
1598 | |
1599 | spin_lock_bh(&conn->cmd_lock); | |
1600 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
1601 | spin_unlock_bh(&conn->cmd_lock); | |
1602 | ||
1603 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
1604 | ||
1605 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1606 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1607 | cmd->i_state); | |
1608 | return 0; | |
1609 | } | |
1610 | ||
561bf158 NB |
1611 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1612 | (unsigned char *)hdr, hdr->cmdsn); | |
778de368 NB |
1613 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1614 | return 0; | |
778de368 | 1615 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1616 | return -1; |
778de368 NB |
1617 | |
1618 | return 0; | |
1619 | } | |
1620 | /* | |
1621 | * This was a response to a unsolicited NOPIN ping. | |
1622 | */ | |
1623 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { | |
1624 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); | |
1625 | if (!cmd_p) | |
1626 | return -EINVAL; | |
1627 | ||
1628 | iscsit_stop_nopin_response_timer(conn); | |
1629 | ||
1630 | cmd_p->i_state = ISTATE_REMOVE; | |
1631 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
1632 | ||
1633 | iscsit_start_nopin_timer(conn); | |
1634 | return 0; | |
1635 | } | |
1636 | /* | |
1637 | * Otherwise, initiator is not expecting a NOPIN is response. | |
1638 | * Just ignore for now. | |
1639 | */ | |
1640 | return 0; | |
1641 | } | |
1642 | EXPORT_SYMBOL(iscsit_process_nop_out); | |
1643 | ||
1644 | static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1645 | unsigned char *buf) | |
1646 | { | |
1647 | unsigned char *ping_data = NULL; | |
1648 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1649 | struct kvec *iov = NULL; | |
1650 | u32 payload_length = ntoh24(hdr->dlength); | |
1651 | int ret; | |
1652 | ||
1653 | ret = iscsit_setup_nop_out(conn, cmd, hdr); | |
1654 | if (ret < 0) | |
561bf158 | 1655 | return 0; |
778de368 NB |
1656 | /* |
1657 | * Handle NOP-OUT payload for traditional iSCSI sockets | |
1658 | */ | |
50e5c87d | 1659 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
778de368 NB |
1660 | u32 checksum, data_crc, padding = 0; |
1661 | int niov = 0, rx_got, rx_size = payload_length; | |
1662 | ||
e48354ce NB |
1663 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); |
1664 | if (!ping_data) { | |
1665 | pr_err("Unable to allocate memory for" | |
1666 | " NOPOUT ping data.\n"); | |
1667 | ret = -1; | |
1668 | goto out; | |
1669 | } | |
1670 | ||
1671 | iov = &cmd->iov_misc[0]; | |
1672 | iov[niov].iov_base = ping_data; | |
1673 | iov[niov++].iov_len = payload_length; | |
1674 | ||
1675 | padding = ((-payload_length) & 3); | |
1676 | if (padding != 0) { | |
1677 | pr_debug("Receiving %u additional bytes" | |
1678 | " for padding.\n", padding); | |
1679 | iov[niov].iov_base = &cmd->pad_bytes; | |
1680 | iov[niov++].iov_len = padding; | |
1681 | rx_size += padding; | |
1682 | } | |
1683 | if (conn->conn_ops->DataDigest) { | |
1684 | iov[niov].iov_base = &checksum; | |
1685 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1686 | rx_size += ISCSI_CRC_LEN; | |
1687 | } | |
1688 | ||
1689 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1690 | if (rx_got != rx_size) { | |
1691 | ret = -1; | |
1692 | goto out; | |
1693 | } | |
1694 | ||
1695 | if (conn->conn_ops->DataDigest) { | |
1696 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1697 | ping_data, payload_length, | |
1698 | padding, cmd->pad_bytes, | |
1699 | (u8 *)&data_crc); | |
1700 | ||
1701 | if (checksum != data_crc) { | |
1702 | pr_err("Ping data CRC32C DataDigest" | |
1703 | " 0x%08x does not match computed 0x%08x\n", | |
1704 | checksum, data_crc); | |
1705 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1706 | pr_err("Unable to recover from" | |
1707 | " NOPOUT Ping DataCRC failure while in" | |
1708 | " ERL=0.\n"); | |
1709 | ret = -1; | |
1710 | goto out; | |
1711 | } else { | |
1712 | /* | |
1713 | * Silently drop this PDU and let the | |
1714 | * initiator plug the CmdSN gap. | |
1715 | */ | |
1716 | pr_debug("Dropping NOPOUT" | |
1717 | " Command CmdSN: 0x%08x due to" | |
1718 | " DataCRC error.\n", hdr->cmdsn); | |
1719 | ret = 0; | |
1720 | goto out; | |
1721 | } | |
1722 | } else { | |
1723 | pr_debug("Got CRC32C DataDigest" | |
1724 | " 0x%08x for %u bytes of ping data.\n", | |
1725 | checksum, payload_length); | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | ping_data[payload_length] = '\0'; | |
1730 | /* | |
1731 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1732 | */ | |
8359cf43 | 1733 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1734 | cmd->buf_ptr_size = payload_length; |
1735 | ||
1736 | pr_debug("Got %u bytes of NOPOUT ping" | |
1737 | " data.\n", payload_length); | |
1738 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1739 | } | |
1740 | ||
778de368 | 1741 | return iscsit_process_nop_out(conn, cmd, hdr); |
e48354ce NB |
1742 | out: |
1743 | if (cmd) | |
aafc9d15 | 1744 | iscsit_free_cmd(cmd, false); |
778de368 | 1745 | |
e48354ce NB |
1746 | kfree(ping_data); |
1747 | return ret; | |
1748 | } | |
1749 | ||
3e1c81a9 NB |
1750 | int |
1751 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1752 | unsigned char *buf) | |
e48354ce | 1753 | { |
e48354ce NB |
1754 | struct se_tmr_req *se_tmr; |
1755 | struct iscsi_tmr_req *tmr_req; | |
1756 | struct iscsi_tm *hdr; | |
186a9647 NB |
1757 | int out_of_order_cmdsn = 0, ret; |
1758 | bool sess_ref = false; | |
e48354ce NB |
1759 | u8 function; |
1760 | ||
1761 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1762 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1763 | function = hdr->flags; | |
1764 | ||
1765 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1766 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1767 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1768 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1769 | ||
1770 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1771 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1772 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1773 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1774 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1775 | } |
1776 | ||
1777 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1778 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1779 | pr_err("Task Management Request TASK_REASSIGN not" | |
1780 | " issued as immediate command, bad iSCSI Initiator" | |
1781 | "implementation\n"); | |
ba159914 NB |
1782 | return iscsit_add_reject_cmd(cmd, |
1783 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1784 | } |
1785 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1786 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1787 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1788 | |
d28b1169 AG |
1789 | cmd->data_direction = DMA_NONE; |
1790 | ||
1791 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1792 | if (!cmd->tmr_req) { | |
1793 | pr_err("Unable to allocate memory for" | |
1794 | " Task Management command!\n"); | |
ba159914 NB |
1795 | return iscsit_add_reject_cmd(cmd, |
1796 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1797 | buf); | |
d28b1169 AG |
1798 | } |
1799 | ||
1800 | /* | |
1801 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1802 | * LIO-Target $FABRIC_MOD | |
1803 | */ | |
1804 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1805 | ||
1806 | u8 tcm_function; | |
1807 | int ret; | |
1808 | ||
9ac8928e | 1809 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
d28b1169 | 1810 | conn->sess->se_sess, 0, DMA_NONE, |
68d81f40 | 1811 | TCM_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 | 1812 | |
186a9647 NB |
1813 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); |
1814 | sess_ref = true; | |
1815 | ||
d28b1169 AG |
1816 | switch (function) { |
1817 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1818 | tcm_function = TMR_ABORT_TASK; | |
1819 | break; | |
1820 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1821 | tcm_function = TMR_ABORT_TASK_SET; | |
1822 | break; | |
1823 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1824 | tcm_function = TMR_CLEAR_ACA; | |
1825 | break; | |
1826 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1827 | tcm_function = TMR_CLEAR_TASK_SET; | |
1828 | break; | |
1829 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1830 | tcm_function = TMR_LUN_RESET; | |
1831 | break; | |
1832 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1833 | tcm_function = TMR_TARGET_WARM_RESET; | |
1834 | break; | |
1835 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1836 | tcm_function = TMR_TARGET_COLD_RESET; | |
1837 | break; | |
1838 | default: | |
1839 | pr_err("Unknown iSCSI TMR Function:" | |
1840 | " 0x%02x\n", function); | |
ba159914 NB |
1841 | return iscsit_add_reject_cmd(cmd, |
1842 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
1843 | } |
1844 | ||
1845 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
1846 | tcm_function, GFP_KERNEL); | |
1847 | if (ret < 0) | |
ba159914 NB |
1848 | return iscsit_add_reject_cmd(cmd, |
1849 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
1850 | |
1851 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
1852 | } | |
e48354ce NB |
1853 | |
1854 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
1855 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
1856 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1857 | cmd->init_task_tag = hdr->itt; | |
1858 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1859 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1860 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1861 | se_tmr = cmd->se_cmd.se_tmr_req; |
1862 | tmr_req = cmd->tmr_req; | |
1863 | /* | |
1864 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
1865 | */ | |
1866 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
1867 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
1868 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 1869 | if (ret < 0) { |
e48354ce NB |
1870 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
1871 | goto attach; | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | switch (function) { | |
1876 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1877 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 1878 | if (se_tmr->response) |
e48354ce | 1879 | goto attach; |
e48354ce NB |
1880 | break; |
1881 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1882 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1883 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1884 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1885 | break; | |
1886 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1887 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1888 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1889 | goto attach; | |
1890 | } | |
1891 | break; | |
1892 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1893 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1894 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1895 | goto attach; | |
1896 | } | |
1897 | break; | |
1898 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
1899 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
1900 | /* | |
1901 | * Perform sanity checks on the ExpDataSN only if the | |
1902 | * TASK_REASSIGN was successful. | |
1903 | */ | |
de103c93 | 1904 | if (se_tmr->response) |
e48354ce NB |
1905 | break; |
1906 | ||
1907 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
ba159914 NB |
1908 | return iscsit_add_reject_cmd(cmd, |
1909 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1910 | break; |
1911 | default: | |
1912 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
1913 | " error.\n", function); | |
e48354ce NB |
1914 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
1915 | goto attach; | |
1916 | } | |
1917 | ||
1918 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1919 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
1920 | se_tmr->call_transport = 1; | |
1921 | attach: | |
1922 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1923 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1924 | spin_unlock_bh(&conn->cmd_lock); |
1925 | ||
1926 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 | 1927 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
e48354ce NB |
1928 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) |
1929 | out_of_order_cmdsn = 1; | |
5a4c8666 | 1930 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 1931 | return 0; |
5a4c8666 | 1932 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1933 | return -1; |
e48354ce | 1934 | } |
50e5c87d | 1935 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 1936 | |
5a4c8666 | 1937 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
1938 | return 0; |
1939 | /* | |
1940 | * Found the referenced task, send to transport for processing. | |
1941 | */ | |
1942 | if (se_tmr->call_transport) | |
1943 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
1944 | ||
1945 | /* | |
1946 | * Could not find the referenced LUN, task, or Task Management | |
1947 | * command not authorized or supported. Change state and | |
1948 | * let the tx_thread send the response. | |
1949 | * | |
1950 | * For connection recovery, this is also the default action for | |
1951 | * TMR TASK_REASSIGN. | |
1952 | */ | |
186a9647 NB |
1953 | if (sess_ref) { |
1954 | pr_debug("Handle TMR, using sess_ref=true check\n"); | |
1955 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
1956 | } | |
1957 | ||
e48354ce NB |
1958 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); |
1959 | return 0; | |
1960 | } | |
3e1c81a9 | 1961 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
1962 | |
1963 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
64534aa7 NB |
1964 | int |
1965 | iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1966 | struct iscsi_text *hdr) | |
e48354ce | 1967 | { |
64534aa7 | 1968 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1969 | |
21f5aa7e | 1970 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1971 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
1972 | "greater than MaxXmitDataSegmentLength %u.\n", |
1973 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1974 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1975 | (unsigned char *)hdr); | |
e48354ce NB |
1976 | } |
1977 | ||
122f8afc NB |
1978 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || |
1979 | (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { | |
1980 | pr_err("Multi sequence text commands currently not supported\n"); | |
1981 | return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, | |
1982 | (unsigned char *)hdr); | |
1983 | } | |
1984 | ||
e48354ce NB |
1985 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," |
1986 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
1987 | hdr->exp_statsn, payload_length); | |
1988 | ||
64534aa7 NB |
1989 | cmd->iscsi_opcode = ISCSI_OP_TEXT; |
1990 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
1991 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1992 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1993 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
1994 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); | |
1995 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
1996 | cmd->data_direction = DMA_NONE; | |
e4f4e801 | 1997 | cmd->text_in_ptr = NULL; |
64534aa7 NB |
1998 | |
1999 | return 0; | |
2000 | } | |
2001 | EXPORT_SYMBOL(iscsit_setup_text_cmd); | |
2002 | ||
2003 | int | |
2004 | iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2005 | struct iscsi_text *hdr) | |
2006 | { | |
9864ca9d | 2007 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr; |
64534aa7 NB |
2008 | int cmdsn_ret; |
2009 | ||
9864ca9d | 2010 | if (!text_in) { |
e4f4e801 SG |
2011 | cmd->targ_xfer_tag = be32_to_cpu(hdr->ttt); |
2012 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) { | |
2013 | pr_err("Unable to locate text_in buffer for sendtargets" | |
2014 | " discovery\n"); | |
2015 | goto reject; | |
2016 | } | |
2017 | goto empty_sendtargets; | |
9864ca9d NB |
2018 | } |
2019 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
2020 | pr_err("Received Text Data that is not" | |
2021 | " SendTargets, cannot continue.\n"); | |
2022 | goto reject; | |
2023 | } | |
2024 | text_ptr = strchr(text_in, '='); | |
2025 | if (!text_ptr) { | |
2026 | pr_err("No \"=\" separator found in Text Data," | |
2027 | " cannot continue.\n"); | |
2028 | goto reject; | |
2029 | } | |
2030 | if (!strncmp("=All", text_ptr, 4)) { | |
8060b8dd | 2031 | cmd->cmd_flags |= ICF_SENDTARGETS_ALL; |
6665889c NB |
2032 | } else if (!strncmp("=iqn.", text_ptr, 5) || |
2033 | !strncmp("=eui.", text_ptr, 5)) { | |
8060b8dd | 2034 | cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE; |
9864ca9d NB |
2035 | } else { |
2036 | pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); | |
2037 | goto reject; | |
2038 | } | |
2039 | ||
64534aa7 NB |
2040 | spin_lock_bh(&conn->cmd_lock); |
2041 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
2042 | spin_unlock_bh(&conn->cmd_lock); | |
2043 | ||
e4f4e801 | 2044 | empty_sendtargets: |
64534aa7 NB |
2045 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
2046 | ||
2047 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 NB |
2048 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
2049 | (unsigned char *)hdr, hdr->cmdsn); | |
64534aa7 | 2050 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 NB |
2051 | return -1; |
2052 | ||
64534aa7 NB |
2053 | return 0; |
2054 | } | |
2055 | ||
2056 | return iscsit_execute_cmd(cmd, 0); | |
9864ca9d NB |
2057 | |
2058 | reject: | |
ba159914 NB |
2059 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2060 | (unsigned char *)hdr); | |
64534aa7 NB |
2061 | } |
2062 | EXPORT_SYMBOL(iscsit_process_text_cmd); | |
2063 | ||
2064 | static int | |
2065 | iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2066 | unsigned char *buf) | |
2067 | { | |
2068 | struct iscsi_text *hdr = (struct iscsi_text *)buf; | |
2069 | char *text_in = NULL; | |
2070 | u32 payload_length = ntoh24(hdr->dlength); | |
2071 | int rx_size, rc; | |
2072 | ||
2073 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
2074 | if (rc < 0) | |
561bf158 | 2075 | return 0; |
64534aa7 NB |
2076 | |
2077 | rx_size = payload_length; | |
2078 | if (payload_length) { | |
64534aa7 NB |
2079 | u32 checksum = 0, data_crc = 0; |
2080 | u32 padding = 0, pad_bytes = 0; | |
2081 | int niov = 0, rx_got; | |
2082 | struct kvec iov[3]; | |
2083 | ||
2084 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
e48354ce NB |
2085 | if (!text_in) { |
2086 | pr_err("Unable to allocate memory for" | |
2087 | " incoming text parameters\n"); | |
64534aa7 | 2088 | goto reject; |
e48354ce | 2089 | } |
9864ca9d | 2090 | cmd->text_in_ptr = text_in; |
e48354ce NB |
2091 | |
2092 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
2093 | iov[niov].iov_base = text_in; | |
64534aa7 | 2094 | iov[niov++].iov_len = payload_length; |
e48354ce NB |
2095 | |
2096 | padding = ((-payload_length) & 3); | |
2097 | if (padding != 0) { | |
76f1928e | 2098 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
2099 | iov[niov++].iov_len = padding; |
2100 | rx_size += padding; | |
2101 | pr_debug("Receiving %u additional bytes" | |
2102 | " for padding.\n", padding); | |
2103 | } | |
2104 | if (conn->conn_ops->DataDigest) { | |
2105 | iov[niov].iov_base = &checksum; | |
2106 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2107 | rx_size += ISCSI_CRC_LEN; | |
2108 | } | |
2109 | ||
2110 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
64534aa7 NB |
2111 | if (rx_got != rx_size) |
2112 | goto reject; | |
e48354ce NB |
2113 | |
2114 | if (conn->conn_ops->DataDigest) { | |
2115 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
64534aa7 | 2116 | text_in, payload_length, |
76f1928e | 2117 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
2118 | (u8 *)&data_crc); |
2119 | ||
2120 | if (checksum != data_crc) { | |
2121 | pr_err("Text data CRC32C DataDigest" | |
2122 | " 0x%08x does not match computed" | |
2123 | " 0x%08x\n", checksum, data_crc); | |
2124 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2125 | pr_err("Unable to recover from" | |
2126 | " Text Data digest failure while in" | |
2127 | " ERL=0.\n"); | |
64534aa7 | 2128 | goto reject; |
e48354ce NB |
2129 | } else { |
2130 | /* | |
2131 | * Silently drop this PDU and let the | |
2132 | * initiator plug the CmdSN gap. | |
2133 | */ | |
2134 | pr_debug("Dropping Text" | |
2135 | " Command CmdSN: 0x%08x due to" | |
2136 | " DataCRC error.\n", hdr->cmdsn); | |
2137 | kfree(text_in); | |
2138 | return 0; | |
2139 | } | |
2140 | } else { | |
2141 | pr_debug("Got CRC32C DataDigest" | |
2142 | " 0x%08x for %u bytes of text data.\n", | |
64534aa7 | 2143 | checksum, payload_length); |
e48354ce NB |
2144 | } |
2145 | } | |
64534aa7 | 2146 | text_in[payload_length - 1] = '\0'; |
e48354ce | 2147 | pr_debug("Successfully read %d bytes of text" |
64534aa7 | 2148 | " data.\n", payload_length); |
e48354ce NB |
2149 | } |
2150 | ||
64534aa7 | 2151 | return iscsit_process_text_cmd(conn, cmd, hdr); |
e48354ce | 2152 | |
64534aa7 | 2153 | reject: |
9864ca9d NB |
2154 | kfree(cmd->text_in_ptr); |
2155 | cmd->text_in_ptr = NULL; | |
ba159914 | 2156 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce NB |
2157 | } |
2158 | ||
2159 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2160 | { | |
2161 | struct iscsi_conn *conn_p; | |
2162 | struct iscsi_session *sess = conn->sess; | |
2163 | ||
2164 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2165 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2166 | ||
2167 | atomic_set(&sess->session_logout, 1); | |
2168 | atomic_set(&conn->conn_logout_remove, 1); | |
2169 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2170 | ||
2171 | iscsit_inc_conn_usage_count(conn); | |
2172 | iscsit_inc_session_usage_count(sess); | |
2173 | ||
2174 | spin_lock_bh(&sess->conn_lock); | |
2175 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2176 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2177 | continue; | |
2178 | ||
2179 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2180 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2181 | } | |
2182 | spin_unlock_bh(&sess->conn_lock); | |
2183 | ||
2184 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2185 | ||
2186 | return 0; | |
2187 | } | |
2188 | ||
2189 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2190 | { | |
2191 | struct iscsi_conn *l_conn; | |
2192 | struct iscsi_session *sess = conn->sess; | |
2193 | ||
2194 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2195 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2196 | ||
2197 | /* | |
2198 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2199 | * can arrive on a connection with a differing CID. | |
2200 | */ | |
2201 | if (conn->cid == cmd->logout_cid) { | |
2202 | spin_lock_bh(&conn->state_lock); | |
2203 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2204 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2205 | ||
2206 | atomic_set(&conn->conn_logout_remove, 1); | |
2207 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2208 | iscsit_inc_conn_usage_count(conn); | |
2209 | ||
2210 | spin_unlock_bh(&conn->state_lock); | |
2211 | } else { | |
2212 | /* | |
2213 | * Handle all different cid CLOSECONNECTION requests in | |
2214 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2215 | * time for any non immediate command's CmdSN to be | |
2216 | * acknowledged on the connection in question. | |
2217 | * | |
2218 | * Here we simply make sure the CID is still around. | |
2219 | */ | |
2220 | l_conn = iscsit_get_conn_from_cid(sess, | |
2221 | cmd->logout_cid); | |
2222 | if (!l_conn) { | |
2223 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2224 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2225 | cmd->i_state); | |
2226 | return 0; | |
2227 | } | |
2228 | ||
2229 | iscsit_dec_conn_usage_count(l_conn); | |
2230 | } | |
2231 | ||
2232 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2233 | ||
2234 | return 0; | |
2235 | } | |
2236 | ||
2237 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2238 | { | |
2239 | struct iscsi_session *sess = conn->sess; | |
2240 | ||
2241 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2242 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2243 | ||
2244 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2245 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2246 | " while ERL!=2.\n"); | |
2247 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2248 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2249 | return 0; | |
2250 | } | |
2251 | ||
2252 | if (conn->cid == cmd->logout_cid) { | |
2253 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2254 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2255 | cmd->logout_cid, conn->cid); | |
2256 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2257 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2258 | return 0; | |
2259 | } | |
2260 | ||
2261 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2262 | ||
2263 | return 0; | |
2264 | } | |
2265 | ||
3e1c81a9 NB |
2266 | int |
2267 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2268 | unsigned char *buf) | |
e48354ce NB |
2269 | { |
2270 | int cmdsn_ret, logout_remove = 0; | |
2271 | u8 reason_code = 0; | |
e48354ce NB |
2272 | struct iscsi_logout *hdr; |
2273 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2274 | ||
2275 | hdr = (struct iscsi_logout *) buf; | |
2276 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2277 | |
2278 | if (tiqn) { | |
2279 | spin_lock(&tiqn->logout_stats.lock); | |
2280 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2281 | tiqn->logout_stats.normal_logouts++; | |
2282 | else | |
2283 | tiqn->logout_stats.abnormal_logouts++; | |
2284 | spin_unlock(&tiqn->logout_stats.lock); | |
2285 | } | |
2286 | ||
2287 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2288 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2289 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2290 | hdr->cid, conn->cid); | |
2291 | ||
2292 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2293 | pr_err("Received logout request on connection that" | |
2294 | " is not in logged in state, ignoring request.\n"); | |
aafc9d15 | 2295 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
2296 | return 0; |
2297 | } | |
2298 | ||
e48354ce NB |
2299 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2300 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2301 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2302 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2303 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2304 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2305 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2306 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2307 | cmd->logout_reason = reason_code; |
2308 | cmd->data_direction = DMA_NONE; | |
2309 | ||
2310 | /* | |
2311 | * We need to sleep in these cases (by returning 1) until the Logout | |
2312 | * Response gets sent in the tx thread. | |
2313 | */ | |
2314 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2315 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2316 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2317 | logout_remove = 1; |
2318 | ||
2319 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2320 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2321 | spin_unlock_bh(&conn->cmd_lock); |
2322 | ||
2323 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2324 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2325 | |
2326 | /* | |
2327 | * Immediate commands are executed, well, immediately. | |
2328 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2329 | */ | |
c6037cc5 | 2330 | if (cmd->immediate_cmd) { |
e48354ce NB |
2331 | int ret = iscsit_execute_cmd(cmd, 0); |
2332 | ||
2333 | if (ret < 0) | |
2334 | return ret; | |
2335 | } else { | |
561bf158 | 2336 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
ba159914 | 2337 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2338 | logout_remove = 0; |
ba159914 NB |
2339 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
2340 | return -1; | |
e48354ce NB |
2341 | } |
2342 | ||
2343 | return logout_remove; | |
2344 | } | |
3e1c81a9 | 2345 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce NB |
2346 | |
2347 | static int iscsit_handle_snack( | |
2348 | struct iscsi_conn *conn, | |
2349 | unsigned char *buf) | |
2350 | { | |
e48354ce NB |
2351 | struct iscsi_snack *hdr; |
2352 | ||
2353 | hdr = (struct iscsi_snack *) buf; | |
2354 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2355 | |
2356 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2357 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2358 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2359 | hdr->begrun, hdr->runlength, conn->cid); | |
2360 | ||
2361 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2362 | pr_err("Initiator sent SNACK request while in" | |
2363 | " ErrorRecoveryLevel=0.\n"); | |
ba159914 NB |
2364 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2365 | buf); | |
e48354ce NB |
2366 | } |
2367 | /* | |
2368 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2369 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2370 | */ | |
2371 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2372 | case 0: | |
2373 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2374 | hdr->itt, |
2375 | be32_to_cpu(hdr->ttt), | |
2376 | be32_to_cpu(hdr->begrun), | |
2377 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2378 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2379 | return iscsit_handle_status_snack(conn, hdr->itt, |
2380 | be32_to_cpu(hdr->ttt), | |
2381 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2382 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2383 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2384 | be32_to_cpu(hdr->begrun), | |
2385 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2386 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2387 | /* FIXME: Support R-Data SNACK */ | |
2388 | pr_err("R-Data SNACK Not Supported.\n"); | |
ba159914 NB |
2389 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2390 | buf); | |
e48354ce NB |
2391 | default: |
2392 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2393 | " error.\n", hdr->flags & 0x0f); | |
ba159914 NB |
2394 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2395 | buf); | |
e48354ce NB |
2396 | } |
2397 | ||
2398 | return 0; | |
2399 | } | |
2400 | ||
2401 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2402 | { | |
2403 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2404 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2405 | wait_for_completion_interruptible_timeout( | |
2406 | &conn->rx_half_close_comp, | |
2407 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2408 | } | |
2409 | } | |
2410 | ||
2411 | static int iscsit_handle_immediate_data( | |
2412 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2413 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2414 | u32 length) |
2415 | { | |
2416 | int iov_ret, rx_got = 0, rx_size = 0; | |
2417 | u32 checksum, iov_count = 0, padding = 0; | |
2418 | struct iscsi_conn *conn = cmd->conn; | |
2419 | struct kvec *iov; | |
2420 | ||
2421 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2422 | if (iov_ret < 0) | |
2423 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2424 | ||
2425 | rx_size = length; | |
2426 | iov_count = iov_ret; | |
2427 | iov = &cmd->iov_data[0]; | |
2428 | ||
2429 | padding = ((-length) & 3); | |
2430 | if (padding != 0) { | |
2431 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2432 | iov[iov_count++].iov_len = padding; | |
2433 | rx_size += padding; | |
2434 | } | |
2435 | ||
2436 | if (conn->conn_ops->DataDigest) { | |
2437 | iov[iov_count].iov_base = &checksum; | |
2438 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2439 | rx_size += ISCSI_CRC_LEN; | |
2440 | } | |
2441 | ||
2442 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2443 | ||
2444 | iscsit_unmap_iovec(cmd); | |
2445 | ||
2446 | if (rx_got != rx_size) { | |
2447 | iscsit_rx_thread_wait_for_tcp(conn); | |
2448 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2449 | } | |
2450 | ||
2451 | if (conn->conn_ops->DataDigest) { | |
2452 | u32 data_crc; | |
2453 | ||
2454 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
2455 | cmd->write_data_done, length, padding, | |
2456 | cmd->pad_bytes); | |
2457 | ||
2458 | if (checksum != data_crc) { | |
2459 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2460 | " does not match computed 0x%08x\n", checksum, | |
2461 | data_crc); | |
2462 | ||
2463 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2464 | pr_err("Unable to recover from" | |
2465 | " Immediate Data digest failure while" | |
2466 | " in ERL=0.\n"); | |
ba159914 | 2467 | iscsit_reject_cmd(cmd, |
e48354ce | 2468 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2469 | (unsigned char *)hdr); |
e48354ce NB |
2470 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2471 | } else { | |
ba159914 | 2472 | iscsit_reject_cmd(cmd, |
e48354ce | 2473 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2474 | (unsigned char *)hdr); |
e48354ce NB |
2475 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2476 | } | |
2477 | } else { | |
2478 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2479 | " %u bytes of Immediate Data\n", checksum, | |
2480 | length); | |
2481 | } | |
2482 | } | |
2483 | ||
2484 | cmd->write_data_done += length; | |
2485 | ||
ebf1d95c | 2486 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2487 | spin_lock_bh(&cmd->istate_lock); |
2488 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2489 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2490 | spin_unlock_bh(&cmd->istate_lock); | |
2491 | } | |
2492 | ||
2493 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2494 | } | |
2495 | ||
2496 | /* | |
2497 | * Called with sess->conn_lock held. | |
2498 | */ | |
2499 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2500 | with active network interface */ | |
2501 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2502 | { | |
2503 | struct iscsi_cmd *cmd; | |
2504 | struct iscsi_conn *conn_p; | |
d444edc6 | 2505 | bool found = false; |
e48354ce NB |
2506 | |
2507 | /* | |
2508 | * Only send a Asynchronous Message on connections whos network | |
2509 | * interface is still functional. | |
2510 | */ | |
2511 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2512 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2513 | iscsit_inc_conn_usage_count(conn_p); | |
d444edc6 | 2514 | found = true; |
e48354ce NB |
2515 | break; |
2516 | } | |
2517 | } | |
2518 | ||
d444edc6 | 2519 | if (!found) |
e48354ce NB |
2520 | return; |
2521 | ||
676687c6 | 2522 | cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING); |
e48354ce NB |
2523 | if (!cmd) { |
2524 | iscsit_dec_conn_usage_count(conn_p); | |
2525 | return; | |
2526 | } | |
2527 | ||
2528 | cmd->logout_cid = conn->cid; | |
2529 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2530 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2531 | ||
2532 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2533 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2534 | spin_unlock_bh(&conn_p->cmd_lock); |
2535 | ||
2536 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2537 | iscsit_dec_conn_usage_count(conn_p); | |
2538 | } | |
2539 | ||
2540 | static int iscsit_send_conn_drop_async_message( | |
2541 | struct iscsi_cmd *cmd, | |
2542 | struct iscsi_conn *conn) | |
2543 | { | |
2544 | struct iscsi_async *hdr; | |
2545 | ||
2546 | cmd->tx_size = ISCSI_HDR_LEN; | |
2547 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2548 | ||
2549 | hdr = (struct iscsi_async *) cmd->pdu; | |
2550 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2551 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2552 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2553 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2554 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2555 | cmd->stat_sn = conn->stat_sn++; | |
2556 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2557 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2558 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2559 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; | |
2560 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2561 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2562 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2563 | ||
2564 | if (conn->conn_ops->HeaderDigest) { | |
2565 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2566 | ||
80690fdb GU |
2567 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2568 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2569 | |
2570 | cmd->tx_size += ISCSI_CRC_LEN; | |
2571 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2572 | " Async Message 0x%08x\n", *header_digest); | |
2573 | } | |
2574 | ||
2575 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2576 | cmd->iov_misc[0].iov_len = cmd->tx_size; | |
2577 | cmd->iov_misc_count = 1; | |
2578 | ||
2579 | pr_debug("Sending Connection Dropped Async Message StatSN:" | |
2580 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2581 | cmd->logout_cid, conn->cid); | |
2582 | return 0; | |
2583 | } | |
2584 | ||
6f3c0e69 AG |
2585 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2586 | { | |
2587 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2588 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2589 | wait_for_completion_interruptible_timeout( | |
2590 | &conn->tx_half_close_comp, | |
2591 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2592 | } | |
2593 | } | |
2594 | ||
2ec5a8c1 NB |
2595 | static void |
2596 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2597 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2598 | bool set_statsn) | |
e48354ce | 2599 | { |
2ec5a8c1 NB |
2600 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2601 | hdr->flags = datain->flags; | |
2602 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2603 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2604 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2605 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2606 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2607 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2608 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2609 | } | |
2610 | } | |
2611 | hton24(hdr->dlength, datain->length); | |
2612 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2613 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2614 | (struct scsi_lun *)&hdr->lun); | |
2615 | else | |
2616 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2617 | ||
2618 | hdr->itt = cmd->init_task_tag; | |
2619 | ||
2620 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2621 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2622 | else | |
2623 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2624 | if (set_statsn) | |
2625 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2626 | else | |
2627 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2628 | ||
2629 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2630 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2631 | hdr->datasn = cpu_to_be32(datain->data_sn); | |
2632 | hdr->offset = cpu_to_be32(datain->offset); | |
2633 | ||
2634 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2635 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2636 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2637 | ntohl(hdr->offset), datain->length, conn->cid); | |
2638 | } | |
2639 | ||
2640 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2641 | { | |
2642 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2643 | struct iscsi_datain datain; |
2644 | struct iscsi_datain_req *dr; | |
e48354ce | 2645 | struct kvec *iov; |
2ec5a8c1 NB |
2646 | u32 iov_count = 0, tx_size = 0; |
2647 | int eodr = 0, ret, iov_ret; | |
2648 | bool set_statsn = false; | |
e48354ce NB |
2649 | |
2650 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2651 | dr = iscsit_get_datain_values(cmd, &datain); | |
2652 | if (!dr) { | |
2653 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2654 | cmd->init_task_tag); | |
2655 | return -1; | |
2656 | } | |
e48354ce NB |
2657 | /* |
2658 | * Be paranoid and double check the logic for now. | |
2659 | */ | |
ebf1d95c | 2660 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2661 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2662 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2663 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2664 | cmd->se_cmd.data_length); |
e48354ce NB |
2665 | return -1; |
2666 | } | |
2667 | ||
04f3b31b | 2668 | atomic_long_add(datain.length, &conn->sess->tx_data_octets); |
e48354ce NB |
2669 | /* |
2670 | * Special case for successfully execution w/ both DATAIN | |
2671 | * and Sense Data. | |
2672 | */ | |
2673 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2674 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2675 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2676 | else { | |
2677 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2678 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2679 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2680 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2681 | set_statsn = true; |
e48354ce | 2682 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2683 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2684 | set_statsn = true; | |
e48354ce NB |
2685 | } |
2686 | ||
2ec5a8c1 | 2687 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce NB |
2688 | |
2689 | iov = &cmd->iov_data[0]; | |
2690 | iov[iov_count].iov_base = cmd->pdu; | |
2691 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
2692 | tx_size += ISCSI_HDR_LEN; | |
2693 | ||
2694 | if (conn->conn_ops->HeaderDigest) { | |
2695 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2696 | ||
80690fdb GU |
2697 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, |
2698 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2699 | |
2700 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2701 | tx_size += ISCSI_CRC_LEN; | |
2702 | ||
2703 | pr_debug("Attaching CRC32 HeaderDigest" | |
2704 | " for DataIN PDU 0x%08x\n", *header_digest); | |
2705 | } | |
2706 | ||
2ec5a8c1 NB |
2707 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], |
2708 | datain.offset, datain.length); | |
e48354ce NB |
2709 | if (iov_ret < 0) |
2710 | return -1; | |
2711 | ||
2712 | iov_count += iov_ret; | |
2713 | tx_size += datain.length; | |
2714 | ||
2715 | cmd->padding = ((-datain.length) & 3); | |
2716 | if (cmd->padding) { | |
2717 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2718 | iov[iov_count++].iov_len = cmd->padding; | |
2719 | tx_size += cmd->padding; | |
2720 | ||
2721 | pr_debug("Attaching %u padding bytes\n", | |
2722 | cmd->padding); | |
2723 | } | |
2724 | if (conn->conn_ops->DataDigest) { | |
2725 | cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, | |
2726 | datain.offset, datain.length, cmd->padding, cmd->pad_bytes); | |
2727 | ||
2728 | iov[iov_count].iov_base = &cmd->data_crc; | |
2729 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2730 | tx_size += ISCSI_CRC_LEN; | |
2731 | ||
2732 | pr_debug("Attached CRC32C DataDigest %d bytes, crc" | |
2733 | " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); | |
2734 | } | |
2735 | ||
2736 | cmd->iov_data_count = iov_count; | |
2737 | cmd->tx_size = tx_size; | |
2738 | ||
6f3c0e69 AG |
2739 | /* sendpage is preferred but can't insert markers */ |
2740 | if (!conn->conn_ops->IFMarker) | |
2741 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
2742 | else | |
2743 | ret = iscsit_send_tx_data(cmd, conn, 0); | |
2744 | ||
2745 | iscsit_unmap_iovec(cmd); | |
2746 | ||
2747 | if (ret < 0) { | |
2748 | iscsit_tx_thread_wait_for_tcp(conn); | |
2749 | return ret; | |
2750 | } | |
2751 | ||
e48354ce | 2752 | if (dr->dr_complete) { |
6f3c0e69 | 2753 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2754 | 2 : 1; |
2755 | iscsit_free_datain_req(cmd, dr); | |
2756 | } | |
2757 | ||
6f3c0e69 | 2758 | return eodr; |
e48354ce NB |
2759 | } |
2760 | ||
2ec5a8c1 NB |
2761 | int |
2762 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2763 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2764 | { |
e48354ce NB |
2765 | struct iscsi_conn *logout_conn = NULL; |
2766 | struct iscsi_conn_recovery *cr = NULL; | |
2767 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2768 | /* |
2769 | * The actual shutting down of Sessions and/or Connections | |
2770 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2771 | * is done in scsi_logout_post_handler(). | |
2772 | */ | |
2773 | switch (cmd->logout_reason) { | |
2774 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2775 | pr_debug("iSCSI session logout successful, setting" | |
2776 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2777 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2778 | break; | |
2779 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2780 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2781 | break; | |
2782 | /* | |
2783 | * For CLOSECONNECTION logout requests carrying | |
2784 | * a matching logout CID -> local CID, the reference | |
2785 | * for the local CID will have been incremented in | |
2786 | * iscsi_logout_closeconnection(). | |
2787 | * | |
2788 | * For CLOSECONNECTION logout requests carrying | |
2789 | * a different CID than the connection it arrived | |
2790 | * on, the connection responding to cmd->logout_cid | |
2791 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2792 | */ | |
2793 | ||
2794 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2795 | " successful.\n", cmd->logout_cid, conn->cid); | |
2796 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2797 | break; | |
2798 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2799 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2800 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2801 | break; | |
2802 | /* | |
2803 | * If the connection is still active from our point of view | |
2804 | * force connection recovery to occur. | |
2805 | */ | |
2806 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2807 | cmd->logout_cid); | |
ee1b1b9c | 2808 | if (logout_conn) { |
e48354ce NB |
2809 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2810 | iscsit_dec_conn_usage_count(logout_conn); | |
2811 | } | |
2812 | ||
2813 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2814 | conn->sess, cmd->logout_cid); | |
2815 | if (!cr) { | |
2816 | pr_err("Unable to locate CID: %hu for" | |
2817 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2818 | cmd->logout_cid); | |
2819 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2820 | break; | |
2821 | } | |
2822 | ||
2823 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2824 | ||
2825 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2826 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2827 | cmd->logout_cid, conn->cid); | |
2828 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2829 | break; | |
2830 | default: | |
2831 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2832 | cmd->logout_reason); | |
2833 | return -1; | |
2834 | } | |
2835 | ||
e48354ce NB |
2836 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2837 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2838 | hdr->response = cmd->logout_response; | |
66c7db68 | 2839 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2840 | cmd->stat_sn = conn->stat_sn++; |
2841 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2842 | ||
2843 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2844 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2845 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2846 | ||
2ec5a8c1 NB |
2847 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2848 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2849 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2850 | cmd->logout_cid, conn->cid); | |
2851 | ||
2852 | return 0; | |
2853 | } | |
2854 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2855 | ||
2856 | static int | |
2857 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2858 | { | |
2859 | struct kvec *iov; | |
2860 | int niov = 0, tx_size, rc; | |
2861 | ||
2862 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2863 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2864 | if (rc < 0) | |
2865 | return rc; | |
2866 | ||
2867 | tx_size = ISCSI_HDR_LEN; | |
e48354ce NB |
2868 | iov = &cmd->iov_misc[0]; |
2869 | iov[niov].iov_base = cmd->pdu; | |
2870 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2871 | ||
2872 | if (conn->conn_ops->HeaderDigest) { | |
2873 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2874 | ||
80690fdb GU |
2875 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, &cmd->pdu[0], |
2876 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2877 | |
2878 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2879 | tx_size += ISCSI_CRC_LEN; | |
2880 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2881 | " Logout Response 0x%08x\n", *header_digest); | |
2882 | } | |
2883 | cmd->iov_misc_count = niov; | |
2884 | cmd->tx_size = tx_size; | |
2885 | ||
e48354ce NB |
2886 | return 0; |
2887 | } | |
2888 | ||
2ec5a8c1 NB |
2889 | void |
2890 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2891 | struct iscsi_nopin *hdr, bool nopout_response) | |
2892 | { | |
2893 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2894 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2895 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2896 | if (nopout_response) | |
2897 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2898 | hdr->itt = cmd->init_task_tag; | |
2899 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2900 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2901 | conn->stat_sn; | |
2902 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2903 | ||
2904 | if (nopout_response) | |
2905 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2906 | ||
2907 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2908 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2909 | ||
2910 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2911 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
2912 | "Solicitied" : "Unsolicitied", cmd->init_task_tag, | |
2913 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2914 | } | |
2915 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2916 | ||
e48354ce NB |
2917 | /* |
2918 | * Unsolicited NOPIN, either requesting a response or not. | |
2919 | */ | |
2920 | static int iscsit_send_unsolicited_nopin( | |
2921 | struct iscsi_cmd *cmd, | |
2922 | struct iscsi_conn *conn, | |
2923 | int want_response) | |
2924 | { | |
2ec5a8c1 NB |
2925 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2926 | int tx_size = ISCSI_HDR_LEN, ret; | |
e48354ce | 2927 | |
2ec5a8c1 | 2928 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce NB |
2929 | |
2930 | if (conn->conn_ops->HeaderDigest) { | |
2931 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2932 | ||
80690fdb GU |
2933 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2934 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2935 | |
2936 | tx_size += ISCSI_CRC_LEN; | |
2937 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2938 | " NopIN 0x%08x\n", *header_digest); | |
2939 | } | |
2940 | ||
2941 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2942 | cmd->iov_misc[0].iov_len = tx_size; | |
2943 | cmd->iov_misc_count = 1; | |
2944 | cmd->tx_size = tx_size; | |
2945 | ||
2946 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" | |
2947 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2948 | ||
6f3c0e69 AG |
2949 | ret = iscsit_send_tx_data(cmd, conn, 1); |
2950 | if (ret < 0) { | |
2951 | iscsit_tx_thread_wait_for_tcp(conn); | |
2952 | return ret; | |
2953 | } | |
2954 | ||
2955 | spin_lock_bh(&cmd->istate_lock); | |
2956 | cmd->i_state = want_response ? | |
2957 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
2958 | spin_unlock_bh(&cmd->istate_lock); | |
2959 | ||
e48354ce NB |
2960 | return 0; |
2961 | } | |
2962 | ||
2ec5a8c1 NB |
2963 | static int |
2964 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 2965 | { |
2ec5a8c1 | 2966 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 2967 | struct kvec *iov; |
2ec5a8c1 NB |
2968 | u32 padding = 0; |
2969 | int niov = 0, tx_size; | |
e48354ce | 2970 | |
2ec5a8c1 | 2971 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 2972 | |
2ec5a8c1 | 2973 | tx_size = ISCSI_HDR_LEN; |
e48354ce NB |
2974 | iov = &cmd->iov_misc[0]; |
2975 | iov[niov].iov_base = cmd->pdu; | |
2976 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2977 | ||
2978 | if (conn->conn_ops->HeaderDigest) { | |
2979 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2980 | ||
80690fdb GU |
2981 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
2982 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
2983 | |
2984 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2985 | tx_size += ISCSI_CRC_LEN; | |
2986 | pr_debug("Attaching CRC32C HeaderDigest" | |
2987 | " to NopIn 0x%08x\n", *header_digest); | |
2988 | } | |
2989 | ||
2990 | /* | |
2991 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
2992 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
2993 | */ | |
2994 | if (cmd->buf_ptr_size) { | |
2995 | iov[niov].iov_base = cmd->buf_ptr; | |
2996 | iov[niov++].iov_len = cmd->buf_ptr_size; | |
2997 | tx_size += cmd->buf_ptr_size; | |
2998 | ||
2999 | pr_debug("Echoing back %u bytes of ping" | |
3000 | " data.\n", cmd->buf_ptr_size); | |
3001 | ||
3002 | padding = ((-cmd->buf_ptr_size) & 3); | |
3003 | if (padding != 0) { | |
3004 | iov[niov].iov_base = &cmd->pad_bytes; | |
3005 | iov[niov++].iov_len = padding; | |
3006 | tx_size += padding; | |
3007 | pr_debug("Attaching %u additional" | |
3008 | " padding bytes.\n", padding); | |
3009 | } | |
3010 | if (conn->conn_ops->DataDigest) { | |
3011 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3012 | cmd->buf_ptr, cmd->buf_ptr_size, | |
3013 | padding, (u8 *)&cmd->pad_bytes, | |
3014 | (u8 *)&cmd->data_crc); | |
3015 | ||
3016 | iov[niov].iov_base = &cmd->data_crc; | |
3017 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
3018 | tx_size += ISCSI_CRC_LEN; | |
3019 | pr_debug("Attached DataDigest for %u" | |
3020 | " bytes of ping data, CRC 0x%08x\n", | |
3021 | cmd->buf_ptr_size, cmd->data_crc); | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | cmd->iov_misc_count = niov; | |
3026 | cmd->tx_size = tx_size; | |
3027 | ||
e48354ce NB |
3028 | return 0; |
3029 | } | |
3030 | ||
6f3c0e69 | 3031 | static int iscsit_send_r2t( |
e48354ce NB |
3032 | struct iscsi_cmd *cmd, |
3033 | struct iscsi_conn *conn) | |
3034 | { | |
3035 | int tx_size = 0; | |
3036 | struct iscsi_r2t *r2t; | |
3037 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 3038 | int ret; |
e48354ce NB |
3039 | |
3040 | r2t = iscsit_get_r2t_from_list(cmd); | |
3041 | if (!r2t) | |
3042 | return -1; | |
3043 | ||
3044 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3045 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3046 | hdr->opcode = ISCSI_OP_R2T; | |
3047 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3048 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3049 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3050 | hdr->itt = cmd->init_task_tag; |
c1e34b64 | 3051 | r2t->targ_xfer_tag = session_get_next_ttt(conn->sess); |
e48354ce NB |
3052 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); |
3053 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3054 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3055 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3056 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); | |
3057 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3058 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3059 | ||
3060 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
3061 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3062 | tx_size += ISCSI_HDR_LEN; | |
3063 | ||
3064 | if (conn->conn_ops->HeaderDigest) { | |
3065 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3066 | ||
80690fdb GU |
3067 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3068 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3069 | |
3070 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3071 | tx_size += ISCSI_CRC_LEN; | |
3072 | pr_debug("Attaching CRC32 HeaderDigest for R2T" | |
3073 | " PDU 0x%08x\n", *header_digest); | |
3074 | } | |
3075 | ||
3076 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" | |
3077 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3078 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3079 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3080 | r2t->offset, r2t->xfer_len, conn->cid); | |
3081 | ||
3082 | cmd->iov_misc_count = 1; | |
3083 | cmd->tx_size = tx_size; | |
3084 | ||
3085 | spin_lock_bh(&cmd->r2t_lock); | |
3086 | r2t->sent_r2t = 1; | |
3087 | spin_unlock_bh(&cmd->r2t_lock); | |
3088 | ||
6f3c0e69 AG |
3089 | ret = iscsit_send_tx_data(cmd, conn, 1); |
3090 | if (ret < 0) { | |
3091 | iscsit_tx_thread_wait_for_tcp(conn); | |
3092 | return ret; | |
3093 | } | |
3094 | ||
3095 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3096 | iscsit_start_dataout_timer(cmd, conn); | |
3097 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3098 | ||
e48354ce NB |
3099 | return 0; |
3100 | } | |
3101 | ||
3102 | /* | |
8b1e1244 AG |
3103 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3104 | * connection recovery. | |
e48354ce NB |
3105 | */ |
3106 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3107 | struct iscsi_conn *conn, |
3e1c81a9 | 3108 | struct iscsi_cmd *cmd, |
8b1e1244 | 3109 | bool recovery) |
e48354ce NB |
3110 | { |
3111 | int first_r2t = 1; | |
3112 | u32 offset = 0, xfer_len = 0; | |
3113 | ||
3114 | spin_lock_bh(&cmd->r2t_lock); | |
3115 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3116 | spin_unlock_bh(&cmd->r2t_lock); | |
3117 | return 0; | |
3118 | } | |
3119 | ||
8b1e1244 AG |
3120 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3121 | !recovery) | |
c6037cc5 | 3122 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3123 | |
3124 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3125 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3126 | offset = cmd->r2t_offset; | |
3127 | ||
8b1e1244 AG |
3128 | if (first_r2t && recovery) { |
3129 | int new_data_end = offset + | |
3130 | conn->sess->sess_ops->MaxBurstLength - | |
3131 | cmd->next_burst_len; | |
3132 | ||
ebf1d95c AG |
3133 | if (new_data_end > cmd->se_cmd.data_length) |
3134 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3135 | else |
3136 | xfer_len = | |
3137 | conn->sess->sess_ops->MaxBurstLength - | |
3138 | cmd->next_burst_len; | |
e48354ce | 3139 | } else { |
8b1e1244 AG |
3140 | int new_data_end = offset + |
3141 | conn->sess->sess_ops->MaxBurstLength; | |
3142 | ||
ebf1d95c AG |
3143 | if (new_data_end > cmd->se_cmd.data_length) |
3144 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3145 | else |
3146 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3147 | } |
3148 | cmd->r2t_offset += xfer_len; | |
3149 | ||
ebf1d95c | 3150 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3151 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3152 | } else { | |
3153 | struct iscsi_seq *seq; | |
3154 | ||
3155 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3156 | if (!seq) { | |
3157 | spin_unlock_bh(&cmd->r2t_lock); | |
3158 | return -1; | |
3159 | } | |
3160 | ||
3161 | offset = seq->offset; | |
3162 | xfer_len = seq->xfer_len; | |
3163 | ||
3164 | if (cmd->seq_send_order == cmd->seq_count) | |
3165 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3166 | } | |
3167 | cmd->outstanding_r2ts++; | |
3168 | first_r2t = 0; | |
3169 | ||
3170 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3171 | spin_unlock_bh(&cmd->r2t_lock); | |
3172 | return -1; | |
3173 | } | |
3174 | ||
3175 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3176 | break; | |
3177 | } | |
3178 | spin_unlock_bh(&cmd->r2t_lock); | |
3179 | ||
3180 | return 0; | |
3181 | } | |
3182 | ||
2ec5a8c1 NB |
3183 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3184 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3185 | { |
2ec5a8c1 | 3186 | if (inc_stat_sn) |
e48354ce NB |
3187 | cmd->stat_sn = conn->stat_sn++; |
3188 | ||
04f3b31b | 3189 | atomic_long_inc(&conn->sess->rsp_pdus); |
e48354ce | 3190 | |
e48354ce NB |
3191 | memset(hdr, 0, ISCSI_HDR_LEN); |
3192 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3193 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3194 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3195 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3196 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3197 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3198 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3199 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3200 | } |
3201 | hdr->response = cmd->iscsi_response; | |
3202 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3203 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3204 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3205 | ||
3206 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3207 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3208 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3209 | ||
2ec5a8c1 NB |
3210 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3211 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3212 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3213 | cmd->se_cmd.scsi_status, conn->cid); | |
3214 | } | |
3215 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3216 | ||
3217 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3218 | { | |
3219 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
3220 | struct kvec *iov; | |
3221 | u32 padding = 0, tx_size = 0; | |
3222 | int iov_count = 0; | |
3223 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); | |
3224 | ||
3225 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3226 | ||
e48354ce NB |
3227 | iov = &cmd->iov_misc[0]; |
3228 | iov[iov_count].iov_base = cmd->pdu; | |
3229 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3230 | tx_size += ISCSI_HDR_LEN; | |
3231 | ||
3232 | /* | |
3233 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3234 | */ | |
3235 | if (cmd->se_cmd.sense_buffer && | |
3236 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3237 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3238 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3239 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3240 | ||
e48354ce | 3241 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3242 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
9c58b7dd | 3243 | iov[iov_count].iov_base = cmd->sense_buffer; |
e48354ce NB |
3244 | iov[iov_count++].iov_len = |
3245 | (cmd->se_cmd.scsi_sense_length + padding); | |
3246 | tx_size += cmd->se_cmd.scsi_sense_length; | |
3247 | ||
3248 | if (padding) { | |
9c58b7dd | 3249 | memset(cmd->sense_buffer + |
e48354ce NB |
3250 | cmd->se_cmd.scsi_sense_length, 0, padding); |
3251 | tx_size += padding; | |
3252 | pr_debug("Adding %u bytes of padding to" | |
3253 | " SENSE.\n", padding); | |
3254 | } | |
3255 | ||
3256 | if (conn->conn_ops->DataDigest) { | |
3257 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
9c58b7dd | 3258 | cmd->sense_buffer, |
e48354ce NB |
3259 | (cmd->se_cmd.scsi_sense_length + padding), |
3260 | 0, NULL, (u8 *)&cmd->data_crc); | |
3261 | ||
3262 | iov[iov_count].iov_base = &cmd->data_crc; | |
3263 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3264 | tx_size += ISCSI_CRC_LEN; | |
3265 | ||
3266 | pr_debug("Attaching CRC32 DataDigest for" | |
3267 | " SENSE, %u bytes CRC 0x%08x\n", | |
3268 | (cmd->se_cmd.scsi_sense_length + padding), | |
3269 | cmd->data_crc); | |
3270 | } | |
3271 | ||
3272 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" | |
3273 | " Response PDU\n", | |
3274 | cmd->se_cmd.scsi_sense_length); | |
3275 | } | |
3276 | ||
3277 | if (conn->conn_ops->HeaderDigest) { | |
3278 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3279 | ||
80690fdb GU |
3280 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu, |
3281 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3282 | |
3283 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3284 | tx_size += ISCSI_CRC_LEN; | |
3285 | pr_debug("Attaching CRC32 HeaderDigest for Response" | |
3286 | " PDU 0x%08x\n", *header_digest); | |
3287 | } | |
3288 | ||
3289 | cmd->iov_misc_count = iov_count; | |
3290 | cmd->tx_size = tx_size; | |
3291 | ||
e48354ce NB |
3292 | return 0; |
3293 | } | |
3294 | ||
3295 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3296 | { | |
3297 | switch (se_tmr->response) { | |
3298 | case TMR_FUNCTION_COMPLETE: | |
3299 | return ISCSI_TMF_RSP_COMPLETE; | |
3300 | case TMR_TASK_DOES_NOT_EXIST: | |
3301 | return ISCSI_TMF_RSP_NO_TASK; | |
3302 | case TMR_LUN_DOES_NOT_EXIST: | |
3303 | return ISCSI_TMF_RSP_NO_LUN; | |
3304 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3305 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
e48354ce NB |
3306 | case TMR_FUNCTION_REJECTED: |
3307 | default: | |
3308 | return ISCSI_TMF_RSP_REJECTED; | |
3309 | } | |
3310 | } | |
3311 | ||
2ec5a8c1 NB |
3312 | void |
3313 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3314 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3315 | { |
3316 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3317 | |
e48354ce | 3318 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3319 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3320 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3321 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3322 | cmd->stat_sn = conn->stat_sn++; |
3323 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3324 | ||
3325 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3326 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3327 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3328 | ||
2ec5a8c1 NB |
3329 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3330 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3331 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3332 | } | |
3333 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3334 | ||
3335 | static int | |
3336 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3337 | { | |
3338 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
3339 | u32 tx_size = 0; | |
3340 | ||
3341 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3342 | ||
e48354ce NB |
3343 | cmd->iov_misc[0].iov_base = cmd->pdu; |
3344 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3345 | tx_size += ISCSI_HDR_LEN; | |
3346 | ||
3347 | if (conn->conn_ops->HeaderDigest) { | |
3348 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3349 | ||
80690fdb GU |
3350 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3351 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3352 | |
3353 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3354 | tx_size += ISCSI_CRC_LEN; | |
3355 | pr_debug("Attaching CRC32 HeaderDigest for Task" | |
3356 | " Mgmt Response PDU 0x%08x\n", *header_digest); | |
3357 | } | |
3358 | ||
3359 | cmd->iov_misc_count = 1; | |
3360 | cmd->tx_size = tx_size; | |
3361 | ||
e48354ce NB |
3362 | return 0; |
3363 | } | |
3364 | ||
2f9bc894 NB |
3365 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3366 | { | |
3367 | bool ret = false; | |
3368 | ||
3369 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3370 | const struct sockaddr_in6 sin6 = { | |
3371 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3372 | struct sockaddr_in6 *sock_in6 = | |
3373 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3374 | ||
3375 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3376 | sin6.sin6_addr.s6_addr, 16)) | |
3377 | ret = true; | |
3378 | } else { | |
3379 | struct sockaddr_in * sock_in = | |
3380 | (struct sockaddr_in *)&np->np_sockaddr; | |
3381 | ||
cea0b4ce | 3382 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3383 | ret = true; |
3384 | } | |
3385 | ||
3386 | return ret; | |
3387 | } | |
3388 | ||
8b1e1244 AG |
3389 | #define SENDTARGETS_BUF_LIMIT 32768U |
3390 | ||
22c7aaa5 SG |
3391 | static int |
3392 | iscsit_build_sendtargets_response(struct iscsi_cmd *cmd, | |
e4f4e801 SG |
3393 | enum iscsit_transport_type network_transport, |
3394 | int skip_bytes, bool *completed) | |
e48354ce NB |
3395 | { |
3396 | char *payload = NULL; | |
3397 | struct iscsi_conn *conn = cmd->conn; | |
3398 | struct iscsi_portal_group *tpg; | |
3399 | struct iscsi_tiqn *tiqn; | |
3400 | struct iscsi_tpg_np *tpg_np; | |
3401 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
2dd1d53f | 3402 | int target_name_printed; |
8b1e1244 | 3403 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
6665889c | 3404 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; |
e48354ce | 3405 | |
be7dcfb6 | 3406 | buffer_len = min(conn->conn_ops->MaxRecvDataSegmentLength, |
8b1e1244 | 3407 | SENDTARGETS_BUF_LIMIT); |
e48354ce NB |
3408 | |
3409 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3410 | if (!payload) { | |
3411 | pr_err("Unable to allocate memory for sendtargets" | |
3412 | " response.\n"); | |
3413 | return -ENOMEM; | |
3414 | } | |
6665889c | 3415 | /* |
8060b8dd | 3416 | * Locate pointer to iqn./eui. string for ICF_SENDTARGETS_SINGLE |
6665889c NB |
3417 | * explicit case.. |
3418 | */ | |
8060b8dd | 3419 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) { |
6665889c NB |
3420 | text_ptr = strchr(text_in, '='); |
3421 | if (!text_ptr) { | |
3422 | pr_err("Unable to locate '=' string in text_in:" | |
3423 | " %s\n", text_in); | |
4f45d320 | 3424 | kfree(payload); |
6665889c NB |
3425 | return -EINVAL; |
3426 | } | |
3427 | /* | |
3428 | * Skip over '=' character.. | |
3429 | */ | |
3430 | text_ptr += 1; | |
3431 | } | |
e48354ce NB |
3432 | |
3433 | spin_lock(&tiqn_lock); | |
3434 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
8060b8dd | 3435 | if ((cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) && |
6665889c NB |
3436 | strcmp(tiqn->tiqn, text_ptr)) { |
3437 | continue; | |
3438 | } | |
3439 | ||
2dd1d53f | 3440 | target_name_printed = 0; |
e48354ce NB |
3441 | |
3442 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3443 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3444 | ||
2dd1d53f TG |
3445 | /* If demo_mode_discovery=0 and generate_node_acls=0 |
3446 | * (demo mode dislabed) do not return | |
3447 | * TargetName+TargetAddress unless a NodeACL exists. | |
3448 | */ | |
3449 | ||
3450 | if ((tpg->tpg_attrib.generate_node_acls == 0) && | |
3451 | (tpg->tpg_attrib.demo_mode_discovery == 0) && | |
3452 | (!core_tpg_get_initiator_node_acl(&tpg->tpg_se_tpg, | |
3453 | cmd->conn->sess->sess_ops->InitiatorName))) { | |
3454 | continue; | |
3455 | } | |
3456 | ||
e48354ce NB |
3457 | spin_lock(&tpg->tpg_state_lock); |
3458 | if ((tpg->tpg_state == TPG_STATE_FREE) || | |
3459 | (tpg->tpg_state == TPG_STATE_INACTIVE)) { | |
3460 | spin_unlock(&tpg->tpg_state_lock); | |
3461 | continue; | |
3462 | } | |
3463 | spin_unlock(&tpg->tpg_state_lock); | |
3464 | ||
3465 | spin_lock(&tpg->tpg_np_lock); | |
3466 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3467 | tpg_np_list) { | |
2f9bc894 NB |
3468 | struct iscsi_np *np = tpg_np->tpg_np; |
3469 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
1997e625 | 3470 | char *fmt_str; |
2f9bc894 | 3471 | |
22c7aaa5 SG |
3472 | if (np->np_network_transport != network_transport) |
3473 | continue; | |
3474 | ||
2dd1d53f TG |
3475 | if (!target_name_printed) { |
3476 | len = sprintf(buf, "TargetName=%s", | |
3477 | tiqn->tiqn); | |
3478 | len += 1; | |
3479 | ||
3480 | if ((len + payload_len) > buffer_len) { | |
3481 | spin_unlock(&tpg->tpg_np_lock); | |
3482 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3483 | end_of_buf = 1; | |
3484 | goto eob; | |
3485 | } | |
e4f4e801 SG |
3486 | |
3487 | if (skip_bytes && len <= skip_bytes) { | |
3488 | skip_bytes -= len; | |
3489 | } else { | |
3490 | memcpy(payload + payload_len, buf, len); | |
3491 | payload_len += len; | |
3492 | target_name_printed = 1; | |
3493 | if (len > skip_bytes) | |
3494 | skip_bytes = 0; | |
3495 | } | |
2dd1d53f TG |
3496 | } |
3497 | ||
1997e625 AG |
3498 | if (np->np_sockaddr.ss_family == AF_INET6) |
3499 | fmt_str = "TargetAddress=[%s]:%hu,%hu"; | |
3500 | else | |
3501 | fmt_str = "TargetAddress=%s:%hu,%hu"; | |
3502 | ||
3503 | len = sprintf(buf, fmt_str, | |
0bcc297e | 3504 | inaddr_any ? conn->local_ip : np->np_ip, |
f2774f43 | 3505 | np->np_port, |
e48354ce NB |
3506 | tpg->tpgt); |
3507 | len += 1; | |
3508 | ||
3509 | if ((len + payload_len) > buffer_len) { | |
3510 | spin_unlock(&tpg->tpg_np_lock); | |
3511 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3512 | end_of_buf = 1; | |
3513 | goto eob; | |
3514 | } | |
e4f4e801 SG |
3515 | |
3516 | if (skip_bytes && len <= skip_bytes) { | |
3517 | skip_bytes -= len; | |
3518 | } else { | |
3519 | memcpy(payload + payload_len, buf, len); | |
3520 | payload_len += len; | |
3521 | if (len > skip_bytes) | |
3522 | skip_bytes = 0; | |
3523 | } | |
e48354ce NB |
3524 | } |
3525 | spin_unlock(&tpg->tpg_np_lock); | |
3526 | } | |
3527 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3528 | eob: | |
e4f4e801 SG |
3529 | if (end_of_buf) { |
3530 | *completed = false; | |
e48354ce | 3531 | break; |
e4f4e801 | 3532 | } |
6665889c | 3533 | |
8060b8dd | 3534 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) |
6665889c | 3535 | break; |
e48354ce NB |
3536 | } |
3537 | spin_unlock(&tiqn_lock); | |
3538 | ||
3539 | cmd->buf_ptr = payload; | |
3540 | ||
3541 | return payload_len; | |
3542 | } | |
3543 | ||
889c8a68 NB |
3544 | int |
3545 | iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
22c7aaa5 SG |
3546 | struct iscsi_text_rsp *hdr, |
3547 | enum iscsit_transport_type network_transport) | |
e48354ce | 3548 | { |
889c8a68 | 3549 | int text_length, padding; |
e4f4e801 | 3550 | bool completed = true; |
e48354ce | 3551 | |
e4f4e801 SG |
3552 | text_length = iscsit_build_sendtargets_response(cmd, network_transport, |
3553 | cmd->read_data_done, | |
3554 | &completed); | |
e48354ce NB |
3555 | if (text_length < 0) |
3556 | return text_length; | |
3557 | ||
e4f4e801 SG |
3558 | if (completed) { |
3559 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3560 | } else { | |
3561 | hdr->flags |= ISCSI_FLAG_TEXT_CONTINUE; | |
3562 | cmd->read_data_done += text_length; | |
3563 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
3564 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
3565 | } | |
889c8a68 | 3566 | hdr->opcode = ISCSI_OP_TEXT_RSP; |
e48354ce | 3567 | padding = ((-text_length) & 3); |
e48354ce | 3568 | hton24(hdr->dlength, text_length); |
889c8a68 NB |
3569 | hdr->itt = cmd->init_task_tag; |
3570 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3571 | cmd->stat_sn = conn->stat_sn++; | |
3572 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
e48354ce NB |
3573 | |
3574 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
e4f4e801 SG |
3575 | /* |
3576 | * Reset maxcmdsn_inc in multi-part text payload exchanges to | |
3577 | * correctly increment MaxCmdSN for each response answering a | |
3578 | * non immediate text request with a valid CmdSN. | |
3579 | */ | |
3580 | cmd->maxcmdsn_inc = 0; | |
889c8a68 NB |
3581 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
3582 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
e48354ce | 3583 | |
e4f4e801 SG |
3584 | pr_debug("Built Text Response: ITT: 0x%08x, TTT: 0x%08x, StatSN: 0x%08x," |
3585 | " Length: %u, CID: %hu F: %d C: %d\n", cmd->init_task_tag, | |
3586 | cmd->targ_xfer_tag, cmd->stat_sn, text_length, conn->cid, | |
3587 | !!(hdr->flags & ISCSI_FLAG_CMD_FINAL), | |
3588 | !!(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)); | |
889c8a68 NB |
3589 | |
3590 | return text_length + padding; | |
3591 | } | |
3592 | EXPORT_SYMBOL(iscsit_build_text_rsp); | |
e48354ce | 3593 | |
889c8a68 NB |
3594 | static int iscsit_send_text_rsp( |
3595 | struct iscsi_cmd *cmd, | |
3596 | struct iscsi_conn *conn) | |
3597 | { | |
3598 | struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; | |
3599 | struct kvec *iov; | |
3600 | u32 tx_size = 0; | |
3601 | int text_length, iov_count = 0, rc; | |
3602 | ||
22c7aaa5 | 3603 | rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_TCP); |
889c8a68 NB |
3604 | if (rc < 0) |
3605 | return rc; | |
3606 | ||
3607 | text_length = rc; | |
3608 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3609 | iov[iov_count].iov_base = cmd->pdu; |
3610 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3611 | iov[iov_count].iov_base = cmd->buf_ptr; | |
889c8a68 | 3612 | iov[iov_count++].iov_len = text_length; |
e48354ce | 3613 | |
889c8a68 | 3614 | tx_size += (ISCSI_HDR_LEN + text_length); |
e48354ce NB |
3615 | |
3616 | if (conn->conn_ops->HeaderDigest) { | |
3617 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3618 | ||
80690fdb GU |
3619 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3620 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3621 | |
3622 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3623 | tx_size += ISCSI_CRC_LEN; | |
3624 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3625 | " Text Response PDU 0x%08x\n", *header_digest); | |
3626 | } | |
3627 | ||
3628 | if (conn->conn_ops->DataDigest) { | |
3629 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
889c8a68 | 3630 | cmd->buf_ptr, text_length, |
e48354ce NB |
3631 | 0, NULL, (u8 *)&cmd->data_crc); |
3632 | ||
3633 | iov[iov_count].iov_base = &cmd->data_crc; | |
3634 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3635 | tx_size += ISCSI_CRC_LEN; | |
3636 | ||
3637 | pr_debug("Attaching DataDigest for %u bytes of text" | |
889c8a68 | 3638 | " data, CRC 0x%08x\n", text_length, |
e48354ce NB |
3639 | cmd->data_crc); |
3640 | } | |
3641 | ||
3642 | cmd->iov_misc_count = iov_count; | |
3643 | cmd->tx_size = tx_size; | |
3644 | ||
e48354ce NB |
3645 | return 0; |
3646 | } | |
3647 | ||
2ec5a8c1 NB |
3648 | void |
3649 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3650 | struct iscsi_reject *hdr) | |
3651 | { | |
3652 | hdr->opcode = ISCSI_OP_REJECT; | |
ba159914 | 3653 | hdr->reason = cmd->reject_reason; |
2ec5a8c1 NB |
3654 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
3655 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3656 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3657 | cmd->stat_sn = conn->stat_sn++; | |
3658 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3659 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3660 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3661 | ||
3662 | } | |
3663 | EXPORT_SYMBOL(iscsit_build_reject); | |
3664 | ||
e48354ce NB |
3665 | static int iscsit_send_reject( |
3666 | struct iscsi_cmd *cmd, | |
3667 | struct iscsi_conn *conn) | |
3668 | { | |
bfbdb31d | 3669 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3670 | struct kvec *iov; |
bfbdb31d | 3671 | u32 iov_count = 0, tx_size; |
e48354ce | 3672 | |
bfbdb31d | 3673 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce NB |
3674 | |
3675 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3676 | iov[iov_count].iov_base = cmd->pdu; |
3677 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3678 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3679 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3680 | ||
3681 | tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); | |
3682 | ||
3683 | if (conn->conn_ops->HeaderDigest) { | |
3684 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3685 | ||
80690fdb GU |
3686 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr, |
3687 | ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest); | |
e48354ce NB |
3688 | |
3689 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3690 | tx_size += ISCSI_CRC_LEN; | |
3691 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3692 | " REJECT PDU 0x%08x\n", *header_digest); | |
3693 | } | |
3694 | ||
3695 | if (conn->conn_ops->DataDigest) { | |
80690fdb GU |
3696 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->buf_ptr, |
3697 | ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc); | |
e48354ce NB |
3698 | |
3699 | iov[iov_count].iov_base = &cmd->data_crc; | |
3700 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3701 | tx_size += ISCSI_CRC_LEN; | |
3702 | pr_debug("Attaching CRC32 DataDigest for REJECT" | |
3703 | " PDU 0x%08x\n", cmd->data_crc); | |
3704 | } | |
3705 | ||
3706 | cmd->iov_misc_count = iov_count; | |
3707 | cmd->tx_size = tx_size; | |
3708 | ||
3709 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," | |
3710 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3711 | ||
3712 | return 0; | |
3713 | } | |
3714 | ||
e48354ce NB |
3715 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3716 | { | |
e48354ce NB |
3717 | int ord, cpu; |
3718 | /* | |
88dcd2da NB |
3719 | * bitmap_id is assigned from iscsit_global->ts_bitmap from |
3720 | * within iscsit_start_kthreads() | |
e48354ce | 3721 | * |
88dcd2da NB |
3722 | * Here we use bitmap_id to determine which CPU that this |
3723 | * iSCSI connection's RX/TX threads will be scheduled to | |
e48354ce NB |
3724 | * execute upon. |
3725 | */ | |
88dcd2da | 3726 | ord = conn->bitmap_id % cpumask_weight(cpu_online_mask); |
e48354ce NB |
3727 | for_each_online_cpu(cpu) { |
3728 | if (ord-- == 0) { | |
3729 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3730 | return; | |
3731 | } | |
3732 | } | |
3733 | /* | |
3734 | * This should never be reached.. | |
3735 | */ | |
3736 | dump_stack(); | |
3737 | cpumask_setall(conn->conn_cpumask); | |
3738 | } | |
3739 | ||
3740 | static inline void iscsit_thread_check_cpumask( | |
3741 | struct iscsi_conn *conn, | |
3742 | struct task_struct *p, | |
3743 | int mode) | |
3744 | { | |
e48354ce NB |
3745 | /* |
3746 | * mode == 1 signals iscsi_target_tx_thread() usage. | |
3747 | * mode == 0 signals iscsi_target_rx_thread() usage. | |
3748 | */ | |
3749 | if (mode == 1) { | |
3750 | if (!conn->conn_tx_reset_cpumask) | |
3751 | return; | |
3752 | conn->conn_tx_reset_cpumask = 0; | |
3753 | } else { | |
3754 | if (!conn->conn_rx_reset_cpumask) | |
3755 | return; | |
3756 | conn->conn_rx_reset_cpumask = 0; | |
3757 | } | |
3758 | /* | |
3759 | * Update the CPU mask for this single kthread so that | |
3760 | * both TX and RX kthreads are scheduled to run on the | |
3761 | * same CPU. | |
3762 | */ | |
e48354ce NB |
3763 | set_cpus_allowed_ptr(p, conn->conn_cpumask); |
3764 | } | |
3765 | ||
2ec5a8c1 NB |
3766 | static int |
3767 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
e48354ce | 3768 | { |
6f3c0e69 AG |
3769 | int ret; |
3770 | ||
2ec5a8c1 NB |
3771 | switch (state) { |
3772 | case ISTATE_SEND_R2T: | |
3773 | ret = iscsit_send_r2t(cmd, conn); | |
3774 | if (ret < 0) | |
3775 | goto err; | |
3776 | break; | |
3777 | case ISTATE_REMOVE: | |
3778 | spin_lock_bh(&conn->cmd_lock); | |
5159d763 | 3779 | list_del_init(&cmd->i_conn_node); |
2ec5a8c1 | 3780 | spin_unlock_bh(&conn->cmd_lock); |
6f3c0e69 | 3781 | |
aafc9d15 | 3782 | iscsit_free_cmd(cmd, false); |
2ec5a8c1 NB |
3783 | break; |
3784 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3785 | iscsit_mod_nopin_response_timer(conn); | |
3786 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3787 | if (ret < 0) | |
6f3c0e69 | 3788 | goto err; |
2ec5a8c1 NB |
3789 | break; |
3790 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3791 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3792 | if (ret < 0) | |
3793 | goto err; | |
3794 | break; | |
3795 | default: | |
3796 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3797 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3798 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3799 | conn->cid); | |
3800 | goto err; | |
6f3c0e69 AG |
3801 | } |
3802 | ||
3803 | return 0; | |
3804 | ||
3805 | err: | |
3806 | return -1; | |
3807 | } | |
3808 | ||
2ec5a8c1 NB |
3809 | static int |
3810 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3811 | { |
2ec5a8c1 | 3812 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3813 | struct iscsi_queue_req *qr; |
3814 | struct iscsi_cmd *cmd; | |
3815 | u8 state; | |
3816 | int ret; | |
3817 | ||
2ec5a8c1 NB |
3818 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3819 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3820 | cmd = qr->cmd; |
3821 | state = qr->state; | |
3822 | kmem_cache_free(lio_qr_cache, qr); | |
3823 | ||
2ec5a8c1 NB |
3824 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3825 | if (ret < 0) | |
3826 | return ret; | |
3827 | } | |
fd3a9025 | 3828 | |
2ec5a8c1 NB |
3829 | return 0; |
3830 | } | |
6f3c0e69 | 3831 | |
2ec5a8c1 NB |
3832 | static int |
3833 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
3834 | { | |
3835 | int ret; | |
3836 | ||
3837 | check_rsp_state: | |
3838 | switch (state) { | |
3839 | case ISTATE_SEND_DATAIN: | |
3840 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3841 | if (ret < 0) |
3842 | goto err; | |
2ec5a8c1 NB |
3843 | else if (!ret) |
3844 | /* more drs */ | |
3845 | goto check_rsp_state; | |
3846 | else if (ret == 1) { | |
3847 | /* all done */ | |
3848 | spin_lock_bh(&cmd->istate_lock); | |
3849 | cmd->i_state = ISTATE_SENT_STATUS; | |
3850 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3851 | |
2ec5a8c1 NB |
3852 | if (atomic_read(&conn->check_immediate_queue)) |
3853 | return 1; | |
6f3c0e69 | 3854 | |
2ec5a8c1 NB |
3855 | return 0; |
3856 | } else if (ret == 2) { | |
3857 | /* Still must send status, | |
3858 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3859 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3860 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3861 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3862 | state = ISTATE_SEND_STATUS; |
3863 | goto check_rsp_state; | |
3864 | } | |
3865 | ||
3866 | break; | |
3867 | case ISTATE_SEND_STATUS: | |
3868 | case ISTATE_SEND_STATUS_RECOVERY: | |
3869 | ret = iscsit_send_response(cmd, conn); | |
3870 | break; | |
3871 | case ISTATE_SEND_LOGOUTRSP: | |
3872 | ret = iscsit_send_logout(cmd, conn); | |
3873 | break; | |
3874 | case ISTATE_SEND_ASYNCMSG: | |
3875 | ret = iscsit_send_conn_drop_async_message( | |
3876 | cmd, conn); | |
3877 | break; | |
3878 | case ISTATE_SEND_NOPIN: | |
3879 | ret = iscsit_send_nopin(cmd, conn); | |
3880 | break; | |
3881 | case ISTATE_SEND_REJECT: | |
3882 | ret = iscsit_send_reject(cmd, conn); | |
3883 | break; | |
3884 | case ISTATE_SEND_TASKMGTRSP: | |
3885 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3886 | if (ret != 0) | |
6f3c0e69 | 3887 | break; |
2ec5a8c1 NB |
3888 | ret = iscsit_tmr_post_handler(cmd, conn); |
3889 | if (ret != 0) | |
3890 | iscsit_fall_back_to_erl0(conn->sess); | |
3891 | break; | |
3892 | case ISTATE_SEND_TEXTRSP: | |
3893 | ret = iscsit_send_text_rsp(cmd, conn); | |
3894 | break; | |
3895 | default: | |
3896 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3897 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3898 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3899 | state, conn->cid); | |
3900 | goto err; | |
3901 | } | |
3902 | if (ret < 0) | |
3903 | goto err; | |
3904 | ||
3905 | if (iscsit_send_tx_data(cmd, conn, 1) < 0) { | |
3906 | iscsit_tx_thread_wait_for_tcp(conn); | |
3907 | iscsit_unmap_iovec(cmd); | |
3908 | goto err; | |
3909 | } | |
3910 | iscsit_unmap_iovec(cmd); | |
3911 | ||
3912 | switch (state) { | |
3913 | case ISTATE_SEND_LOGOUTRSP: | |
3914 | if (!iscsit_logout_post_handler(cmd, conn)) | |
88dcd2da | 3915 | return -ECONNRESET; |
2ec5a8c1 NB |
3916 | /* fall through */ |
3917 | case ISTATE_SEND_STATUS: | |
3918 | case ISTATE_SEND_ASYNCMSG: | |
3919 | case ISTATE_SEND_NOPIN: | |
3920 | case ISTATE_SEND_STATUS_RECOVERY: | |
3921 | case ISTATE_SEND_TEXTRSP: | |
3922 | case ISTATE_SEND_TASKMGTRSP: | |
ba159914 | 3923 | case ISTATE_SEND_REJECT: |
2ec5a8c1 NB |
3924 | spin_lock_bh(&cmd->istate_lock); |
3925 | cmd->i_state = ISTATE_SENT_STATUS; | |
3926 | spin_unlock_bh(&cmd->istate_lock); | |
3927 | break; | |
2ec5a8c1 NB |
3928 | default: |
3929 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3930 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3931 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3932 | cmd->i_state, conn->cid); | |
3933 | goto err; | |
6f3c0e69 AG |
3934 | } |
3935 | ||
2ec5a8c1 NB |
3936 | if (atomic_read(&conn->check_immediate_queue)) |
3937 | return 1; | |
3938 | ||
6f3c0e69 AG |
3939 | return 0; |
3940 | ||
3941 | err: | |
3942 | return -1; | |
6f3c0e69 AG |
3943 | } |
3944 | ||
2ec5a8c1 NB |
3945 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3946 | { | |
3947 | struct iscsit_transport *t = conn->conn_transport; | |
3948 | struct iscsi_queue_req *qr; | |
3949 | struct iscsi_cmd *cmd; | |
3950 | u8 state; | |
3951 | int ret; | |
3952 | ||
3953 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3954 | cmd = qr->cmd; | |
3955 | state = qr->state; | |
3956 | kmem_cache_free(lio_qr_cache, qr); | |
3957 | ||
3958 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3959 | if (ret == 1 || ret < 0) | |
3960 | return ret; | |
3961 | } | |
3962 | ||
3963 | return 0; | |
3964 | } | |
3965 | ||
6f3c0e69 AG |
3966 | int iscsi_target_tx_thread(void *arg) |
3967 | { | |
e48354ce | 3968 | int ret = 0; |
88dcd2da | 3969 | struct iscsi_conn *conn = arg; |
e48354ce NB |
3970 | /* |
3971 | * Allow ourselves to be interrupted by SIGINT so that a | |
3972 | * connection recovery / failure event can be triggered externally. | |
3973 | */ | |
3974 | allow_signal(SIGINT); | |
3975 | ||
e48354ce NB |
3976 | while (!kthread_should_stop()) { |
3977 | /* | |
3978 | * Ensure that both TX and RX per connection kthreads | |
3979 | * are scheduled to run on the same CPU. | |
3980 | */ | |
3981 | iscsit_thread_check_cpumask(conn, current, 1); | |
3982 | ||
d5627acb | 3983 | wait_event_interruptible(conn->queues_wq, |
88dcd2da | 3984 | !iscsit_conn_all_queues_empty(conn)); |
e48354ce | 3985 | |
88dcd2da | 3986 | if (signal_pending(current)) |
e48354ce NB |
3987 | goto transport_err; |
3988 | ||
fd3a9025 | 3989 | get_immediate: |
2ec5a8c1 | 3990 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3991 | if (ret < 0) |
3992 | goto transport_err; | |
e48354ce | 3993 | |
2ec5a8c1 | 3994 | ret = iscsit_handle_response_queue(conn); |
fd3a9025 NB |
3995 | if (ret == 1) |
3996 | goto get_immediate; | |
88dcd2da NB |
3997 | else if (ret == -ECONNRESET) |
3998 | goto out; | |
6f3c0e69 AG |
3999 | else if (ret < 0) |
4000 | goto transport_err; | |
e48354ce NB |
4001 | } |
4002 | ||
4003 | transport_err: | |
4004 | iscsit_take_action_for_connection_exit(conn); | |
e48354ce NB |
4005 | out: |
4006 | return 0; | |
4007 | } | |
4008 | ||
3e1c81a9 NB |
4009 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
4010 | { | |
4011 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
4012 | struct iscsi_cmd *cmd; | |
4013 | int ret = 0; | |
4014 | ||
4015 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
4016 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 4017 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4018 | if (!cmd) |
ba159914 | 4019 | goto reject; |
3e1c81a9 NB |
4020 | |
4021 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
4022 | break; | |
4023 | case ISCSI_OP_SCSI_DATA_OUT: | |
4024 | ret = iscsit_handle_data_out(conn, buf); | |
4025 | break; | |
4026 | case ISCSI_OP_NOOP_OUT: | |
4027 | cmd = NULL; | |
4028 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
676687c6 | 4029 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4030 | if (!cmd) |
ba159914 | 4031 | goto reject; |
3e1c81a9 NB |
4032 | } |
4033 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
4034 | break; | |
4035 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 4036 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4037 | if (!cmd) |
ba159914 | 4038 | goto reject; |
3e1c81a9 NB |
4039 | |
4040 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
4041 | break; | |
4042 | case ISCSI_OP_TEXT: | |
e4f4e801 SG |
4043 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { |
4044 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); | |
4045 | if (!cmd) | |
4046 | goto reject; | |
4047 | } else { | |
4048 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); | |
4049 | if (!cmd) | |
4050 | goto reject; | |
4051 | } | |
64534aa7 NB |
4052 | |
4053 | ret = iscsit_handle_text_cmd(conn, cmd, buf); | |
3e1c81a9 NB |
4054 | break; |
4055 | case ISCSI_OP_LOGOUT: | |
676687c6 | 4056 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 4057 | if (!cmd) |
ba159914 | 4058 | goto reject; |
3e1c81a9 NB |
4059 | |
4060 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
4061 | if (ret > 0) | |
4062 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
4063 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
4064 | break; | |
4065 | case ISCSI_OP_SNACK: | |
4066 | ret = iscsit_handle_snack(conn, buf); | |
4067 | break; | |
4068 | default: | |
4069 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
4070 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
4071 | pr_err("Cannot recover from unknown" | |
4072 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
4073 | return -1; | |
4074 | } | |
4075 | if (!conn->conn_ops->OFMarker) { | |
4076 | pr_err("Unable to recover from unknown" | |
4077 | " opcode while OFMarker=No, closing iSCSI" | |
4078 | " connection.\n"); | |
4079 | return -1; | |
4080 | } | |
4081 | if (iscsit_recover_from_unknown_opcode(conn) < 0) { | |
4082 | pr_err("Unable to recover from unknown" | |
4083 | " opcode, closing iSCSI connection.\n"); | |
4084 | return -1; | |
4085 | } | |
4086 | break; | |
4087 | } | |
4088 | ||
4089 | return ret; | |
ba159914 NB |
4090 | reject: |
4091 | return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
4092 | } |
4093 | ||
e48354ce NB |
4094 | int iscsi_target_rx_thread(void *arg) |
4095 | { | |
4096 | int ret; | |
4097 | u8 buffer[ISCSI_HDR_LEN], opcode; | |
4098 | u32 checksum = 0, digest = 0; | |
88dcd2da | 4099 | struct iscsi_conn *conn = arg; |
e48354ce NB |
4100 | struct kvec iov; |
4101 | /* | |
4102 | * Allow ourselves to be interrupted by SIGINT so that a | |
4103 | * connection recovery / failure event can be triggered externally. | |
4104 | */ | |
4105 | allow_signal(SIGINT); | |
4106 | ||
3e1c81a9 NB |
4107 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) { |
4108 | struct completion comp; | |
4109 | int rc; | |
4110 | ||
4111 | init_completion(&comp); | |
4112 | rc = wait_for_completion_interruptible(&comp); | |
4113 | if (rc < 0) | |
4114 | goto transport_err; | |
4115 | ||
88dcd2da | 4116 | goto transport_err; |
3e1c81a9 NB |
4117 | } |
4118 | ||
e48354ce NB |
4119 | while (!kthread_should_stop()) { |
4120 | /* | |
4121 | * Ensure that both TX and RX per connection kthreads | |
4122 | * are scheduled to run on the same CPU. | |
4123 | */ | |
4124 | iscsit_thread_check_cpumask(conn, current, 0); | |
4125 | ||
4126 | memset(buffer, 0, ISCSI_HDR_LEN); | |
4127 | memset(&iov, 0, sizeof(struct kvec)); | |
4128 | ||
4129 | iov.iov_base = buffer; | |
4130 | iov.iov_len = ISCSI_HDR_LEN; | |
4131 | ||
4132 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
4133 | if (ret != ISCSI_HDR_LEN) { | |
4134 | iscsit_rx_thread_wait_for_tcp(conn); | |
4135 | goto transport_err; | |
4136 | } | |
4137 | ||
e48354ce NB |
4138 | if (conn->conn_ops->HeaderDigest) { |
4139 | iov.iov_base = &digest; | |
4140 | iov.iov_len = ISCSI_CRC_LEN; | |
4141 | ||
4142 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
4143 | if (ret != ISCSI_CRC_LEN) { | |
4144 | iscsit_rx_thread_wait_for_tcp(conn); | |
4145 | goto transport_err; | |
4146 | } | |
4147 | ||
4148 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
4149 | buffer, ISCSI_HDR_LEN, | |
4150 | 0, NULL, (u8 *)&checksum); | |
4151 | ||
4152 | if (digest != checksum) { | |
4153 | pr_err("HeaderDigest CRC32C failed," | |
4154 | " received 0x%08x, computed 0x%08x\n", | |
4155 | digest, checksum); | |
4156 | /* | |
4157 | * Set the PDU to 0xff so it will intentionally | |
4158 | * hit default in the switch below. | |
4159 | */ | |
4160 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
04f3b31b | 4161 | atomic_long_inc(&conn->sess->conn_digest_errors); |
e48354ce NB |
4162 | } else { |
4163 | pr_debug("Got HeaderDigest CRC32C" | |
4164 | " 0x%08x\n", checksum); | |
4165 | } | |
4166 | } | |
4167 | ||
4168 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
4169 | goto transport_err; | |
4170 | ||
4171 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
4172 | ||
4173 | if (conn->sess->sess_ops->SessionType && | |
4174 | ((!(opcode & ISCSI_OP_TEXT)) || | |
4175 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
4176 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
4177 | " while in Discovery Session, rejecting.\n", opcode); | |
ba159914 NB |
4178 | iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
4179 | buffer); | |
e48354ce NB |
4180 | goto transport_err; |
4181 | } | |
4182 | ||
3e1c81a9 NB |
4183 | ret = iscsi_target_rx_opcode(conn, buffer); |
4184 | if (ret < 0) | |
4185 | goto transport_err; | |
e48354ce NB |
4186 | } |
4187 | ||
4188 | transport_err: | |
4189 | if (!signal_pending(current)) | |
4190 | atomic_set(&conn->transport_failed, 1); | |
4191 | iscsit_take_action_for_connection_exit(conn); | |
e48354ce NB |
4192 | return 0; |
4193 | } | |
4194 | ||
4195 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4196 | { | |
4197 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; | |
4198 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4199 | /* |
4200 | * We expect this function to only ever be called from either RX or TX | |
4201 | * thread context via iscsit_close_connection() once the other context | |
4202 | * has been reset -> returned sleeping pre-handler state. | |
4203 | */ | |
4204 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4205 | list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { |
e48354ce | 4206 | |
5159d763 | 4207 | list_del_init(&cmd->i_conn_node); |
e48354ce NB |
4208 | spin_unlock_bh(&conn->cmd_lock); |
4209 | ||
4210 | iscsit_increment_maxcmdsn(cmd, sess); | |
e48354ce | 4211 | |
aafc9d15 | 4212 | iscsit_free_cmd(cmd, true); |
e48354ce NB |
4213 | |
4214 | spin_lock_bh(&conn->cmd_lock); | |
4215 | } | |
4216 | spin_unlock_bh(&conn->cmd_lock); | |
4217 | } | |
4218 | ||
4219 | static void iscsit_stop_timers_for_cmds( | |
4220 | struct iscsi_conn *conn) | |
4221 | { | |
4222 | struct iscsi_cmd *cmd; | |
4223 | ||
4224 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4225 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4226 | if (cmd->data_direction == DMA_TO_DEVICE) |
4227 | iscsit_stop_dataout_timer(cmd); | |
4228 | } | |
4229 | spin_unlock_bh(&conn->cmd_lock); | |
4230 | } | |
4231 | ||
4232 | int iscsit_close_connection( | |
4233 | struct iscsi_conn *conn) | |
4234 | { | |
4235 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4236 | struct iscsi_session *sess = conn->sess; | |
4237 | ||
4238 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4239 | " %u\n", conn->cid, sess->sid); | |
4240 | /* | |
f068fbc8 NB |
4241 | * Always up conn_logout_comp for the traditional TCP case just in case |
4242 | * the RX Thread in iscsi_target_rx_opcode() is sleeping and the logout | |
4243 | * response never got sent because the connection failed. | |
4244 | * | |
4245 | * However for iser-target, isert_wait4logout() is using conn_logout_comp | |
4246 | * to signal logout response TX interrupt completion. Go ahead and skip | |
4247 | * this for iser since isert_rx_opcode() does not wait on logout failure, | |
4248 | * and to avoid iscsi_conn pointer dereference in iser-target code. | |
e48354ce | 4249 | */ |
f068fbc8 NB |
4250 | if (conn->conn_transport->transport_type == ISCSI_TCP) |
4251 | complete(&conn->conn_logout_comp); | |
e48354ce | 4252 | |
88dcd2da NB |
4253 | if (!strcmp(current->comm, ISCSI_RX_THREAD_NAME)) { |
4254 | if (conn->tx_thread && | |
4255 | cmpxchg(&conn->tx_thread_active, true, false)) { | |
4256 | send_sig(SIGINT, conn->tx_thread, 1); | |
4257 | kthread_stop(conn->tx_thread); | |
4258 | } | |
4259 | } else if (!strcmp(current->comm, ISCSI_TX_THREAD_NAME)) { | |
4260 | if (conn->rx_thread && | |
4261 | cmpxchg(&conn->rx_thread_active, true, false)) { | |
4262 | send_sig(SIGINT, conn->rx_thread, 1); | |
4263 | kthread_stop(conn->rx_thread); | |
4264 | } | |
4265 | } | |
4266 | ||
4267 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
4268 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
4269 | get_order(1)); | |
4270 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
e48354ce NB |
4271 | |
4272 | iscsit_stop_timers_for_cmds(conn); | |
4273 | iscsit_stop_nopin_response_timer(conn); | |
4274 | iscsit_stop_nopin_timer(conn); | |
defd8848 NB |
4275 | |
4276 | if (conn->conn_transport->iscsit_wait_conn) | |
4277 | conn->conn_transport->iscsit_wait_conn(conn); | |
4278 | ||
e48354ce NB |
4279 | /* |
4280 | * During Connection recovery drop unacknowledged out of order | |
4281 | * commands for this connection, and prepare the other commands | |
4282 | * for realligence. | |
4283 | * | |
4284 | * During normal operation clear the out of order commands (but | |
4285 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4286 | * struct iscsi_cmds. | |
4287 | */ | |
4288 | if (atomic_read(&conn->connection_recovery)) { | |
4289 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4290 | iscsit_prepare_cmds_for_realligance(conn); | |
4291 | } else { | |
4292 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4293 | iscsit_release_commands_from_conn(conn); | |
4294 | } | |
bbc05048 | 4295 | iscsit_free_queue_reqs_for_conn(conn); |
e48354ce NB |
4296 | |
4297 | /* | |
4298 | * Handle decrementing session or connection usage count if | |
4299 | * a logout response was not able to be sent because the | |
4300 | * connection failed. Fall back to Session Recovery here. | |
4301 | */ | |
4302 | if (atomic_read(&conn->conn_logout_remove)) { | |
4303 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4304 | iscsit_dec_conn_usage_count(conn); | |
4305 | iscsit_dec_session_usage_count(sess); | |
4306 | } | |
4307 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4308 | iscsit_dec_conn_usage_count(conn); | |
4309 | ||
4310 | atomic_set(&conn->conn_logout_remove, 0); | |
4311 | atomic_set(&sess->session_reinstatement, 0); | |
4312 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4313 | } | |
4314 | ||
4315 | spin_lock_bh(&sess->conn_lock); | |
4316 | list_del(&conn->conn_list); | |
4317 | ||
4318 | /* | |
4319 | * Attempt to let the Initiator know this connection failed by | |
4320 | * sending an Connection Dropped Async Message on another | |
4321 | * active connection. | |
4322 | */ | |
4323 | if (atomic_read(&conn->connection_recovery)) | |
4324 | iscsit_build_conn_drop_async_message(conn); | |
4325 | ||
4326 | spin_unlock_bh(&sess->conn_lock); | |
4327 | ||
4328 | /* | |
4329 | * If connection reinstatement is being performed on this connection, | |
4330 | * up the connection reinstatement semaphore that is being blocked on | |
4331 | * in iscsit_cause_connection_reinstatement(). | |
4332 | */ | |
4333 | spin_lock_bh(&conn->state_lock); | |
4334 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4335 | spin_unlock_bh(&conn->state_lock); | |
4336 | complete(&conn->conn_wait_comp); | |
4337 | wait_for_completion(&conn->conn_post_wait_comp); | |
4338 | spin_lock_bh(&conn->state_lock); | |
4339 | } | |
4340 | ||
4341 | /* | |
4342 | * If connection reinstatement is being performed on this connection | |
4343 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4344 | * connection wait rcfr semaphore that is being blocked on | |
4345 | * an iscsit_connection_reinstatement_rcfr(). | |
4346 | */ | |
4347 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4348 | spin_unlock_bh(&conn->state_lock); | |
4349 | complete(&conn->conn_wait_rcfr_comp); | |
4350 | wait_for_completion(&conn->conn_post_wait_comp); | |
4351 | spin_lock_bh(&conn->state_lock); | |
4352 | } | |
4353 | atomic_set(&conn->connection_reinstatement, 1); | |
4354 | spin_unlock_bh(&conn->state_lock); | |
4355 | ||
4356 | /* | |
4357 | * If any other processes are accessing this connection pointer we | |
4358 | * must wait until they have completed. | |
4359 | */ | |
4360 | iscsit_check_conn_usage_count(conn); | |
4361 | ||
4362 | if (conn->conn_rx_hash.tfm) | |
4363 | crypto_free_hash(conn->conn_rx_hash.tfm); | |
4364 | if (conn->conn_tx_hash.tfm) | |
4365 | crypto_free_hash(conn->conn_tx_hash.tfm); | |
4366 | ||
fbecb659 | 4367 | free_cpumask_var(conn->conn_cpumask); |
e48354ce NB |
4368 | |
4369 | kfree(conn->conn_ops); | |
4370 | conn->conn_ops = NULL; | |
4371 | ||
bf6932f4 | 4372 | if (conn->sock) |
e48354ce | 4373 | sock_release(conn->sock); |
baa4d64b NB |
4374 | |
4375 | if (conn->conn_transport->iscsit_free_conn) | |
4376 | conn->conn_transport->iscsit_free_conn(conn); | |
4377 | ||
4378 | iscsit_put_transport(conn->conn_transport); | |
4379 | ||
e48354ce NB |
4380 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
4381 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4382 | kfree(conn); | |
4383 | ||
4384 | spin_lock_bh(&sess->conn_lock); | |
4385 | atomic_dec(&sess->nconn); | |
4386 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4387 | " %s\n", atomic_read(&sess->nconn), | |
4388 | sess->sess_ops->InitiatorName); | |
4389 | /* | |
4390 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4391 | * Session that they all fail. | |
4392 | */ | |
4393 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4394 | !atomic_read(&sess->session_logout)) | |
4395 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4396 | ||
4397 | /* | |
4398 | * If this was not the last connection in the session, and we are | |
4399 | * performing session reinstatement or falling back to ERL=0, call | |
4400 | * iscsit_stop_session() without sleeping to shutdown the other | |
4401 | * active connections. | |
4402 | */ | |
4403 | if (atomic_read(&sess->nconn)) { | |
4404 | if (!atomic_read(&sess->session_reinstatement) && | |
4405 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4406 | spin_unlock_bh(&sess->conn_lock); | |
4407 | return 0; | |
4408 | } | |
4409 | if (!atomic_read(&sess->session_stop_active)) { | |
4410 | atomic_set(&sess->session_stop_active, 1); | |
4411 | spin_unlock_bh(&sess->conn_lock); | |
4412 | iscsit_stop_session(sess, 0, 0); | |
4413 | return 0; | |
4414 | } | |
4415 | spin_unlock_bh(&sess->conn_lock); | |
4416 | return 0; | |
4417 | } | |
4418 | ||
4419 | /* | |
4420 | * If this was the last connection in the session and one of the | |
4421 | * following is occurring: | |
4422 | * | |
4423 | * Session Reinstatement is not being performed, and are falling back | |
4424 | * to ERL=0 call iscsit_close_session(). | |
4425 | * | |
4426 | * Session Logout was requested. iscsit_close_session() will be called | |
4427 | * elsewhere. | |
4428 | * | |
4429 | * Session Continuation is not being performed, start the Time2Retain | |
4430 | * handler and check if sleep_on_sess_wait_sem is active. | |
4431 | */ | |
4432 | if (!atomic_read(&sess->session_reinstatement) && | |
4433 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4434 | spin_unlock_bh(&sess->conn_lock); | |
99367f01 | 4435 | target_put_session(sess->se_sess); |
e48354ce NB |
4436 | |
4437 | return 0; | |
4438 | } else if (atomic_read(&sess->session_logout)) { | |
4439 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4440 | sess->session_state = TARG_SESS_STATE_FREE; | |
4441 | spin_unlock_bh(&sess->conn_lock); | |
4442 | ||
4443 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4444 | complete(&sess->session_wait_comp); | |
4445 | ||
4446 | return 0; | |
4447 | } else { | |
4448 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4449 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4450 | ||
4451 | if (!atomic_read(&sess->session_continuation)) { | |
4452 | spin_unlock_bh(&sess->conn_lock); | |
4453 | iscsit_start_time2retain_handler(sess); | |
4454 | } else | |
4455 | spin_unlock_bh(&sess->conn_lock); | |
4456 | ||
4457 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4458 | complete(&sess->session_wait_comp); | |
4459 | ||
4460 | return 0; | |
4461 | } | |
4462 | spin_unlock_bh(&sess->conn_lock); | |
4463 | ||
4464 | return 0; | |
4465 | } | |
4466 | ||
4467 | int iscsit_close_session(struct iscsi_session *sess) | |
4468 | { | |
60bfcf8e | 4469 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
4470 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
4471 | ||
4472 | if (atomic_read(&sess->nconn)) { | |
4473 | pr_err("%d connection(s) still exist for iSCSI session" | |
4474 | " to %s\n", atomic_read(&sess->nconn), | |
4475 | sess->sess_ops->InitiatorName); | |
4476 | BUG(); | |
4477 | } | |
4478 | ||
4479 | spin_lock_bh(&se_tpg->session_lock); | |
4480 | atomic_set(&sess->session_logout, 1); | |
4481 | atomic_set(&sess->session_reinstatement, 1); | |
4482 | iscsit_stop_time2retain_timer(sess); | |
4483 | spin_unlock_bh(&se_tpg->session_lock); | |
4484 | ||
4485 | /* | |
4486 | * transport_deregister_session_configfs() will clear the | |
4487 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4488 | * can be setting it again with __transport_register_session() in | |
4489 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4490 | * completes in iscsi_np context. | |
4491 | */ | |
4492 | transport_deregister_session_configfs(sess->se_sess); | |
4493 | ||
4494 | /* | |
4495 | * If any other processes are accessing this session pointer we must | |
4496 | * wait until they have completed. If we are in an interrupt (the | |
4497 | * time2retain handler) and contain and active session usage count we | |
4498 | * restart the timer and exit. | |
4499 | */ | |
4500 | if (!in_interrupt()) { | |
4501 | if (iscsit_check_session_usage_count(sess) == 1) | |
4502 | iscsit_stop_session(sess, 1, 1); | |
4503 | } else { | |
4504 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4505 | atomic_set(&sess->session_logout, 0); | |
4506 | iscsit_start_time2retain_handler(sess); | |
4507 | return 0; | |
4508 | } | |
4509 | } | |
4510 | ||
4511 | transport_deregister_session(sess->se_sess); | |
4512 | ||
4513 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4514 | iscsit_free_connection_recovery_entires(sess); | |
4515 | ||
4516 | iscsit_free_all_ooo_cmdsns(sess); | |
4517 | ||
4518 | spin_lock_bh(&se_tpg->session_lock); | |
4519 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4520 | sess->session_state = TARG_SESS_STATE_FREE; | |
4521 | pr_debug("Released iSCSI session from node: %s\n", | |
4522 | sess->sess_ops->InitiatorName); | |
4523 | tpg->nsessions--; | |
4524 | if (tpg->tpg_tiqn) | |
4525 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4526 | ||
4527 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4528 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4529 | ||
4530 | spin_lock(&sess_idr_lock); | |
4531 | idr_remove(&sess_idr, sess->session_index); | |
4532 | spin_unlock(&sess_idr_lock); | |
4533 | ||
4534 | kfree(sess->sess_ops); | |
4535 | sess->sess_ops = NULL; | |
4536 | spin_unlock_bh(&se_tpg->session_lock); | |
4537 | ||
4538 | kfree(sess); | |
4539 | return 0; | |
4540 | } | |
4541 | ||
4542 | static void iscsit_logout_post_handler_closesession( | |
4543 | struct iscsi_conn *conn) | |
4544 | { | |
4545 | struct iscsi_session *sess = conn->sess; | |
88dcd2da | 4546 | int sleep = cmpxchg(&conn->tx_thread_active, true, false); |
e48354ce NB |
4547 | |
4548 | atomic_set(&conn->conn_logout_remove, 0); | |
4549 | complete(&conn->conn_logout_comp); | |
4550 | ||
4551 | iscsit_dec_conn_usage_count(conn); | |
88dcd2da | 4552 | iscsit_stop_session(sess, sleep, sleep); |
e48354ce | 4553 | iscsit_dec_session_usage_count(sess); |
99367f01 | 4554 | target_put_session(sess->se_sess); |
e48354ce NB |
4555 | } |
4556 | ||
4557 | static void iscsit_logout_post_handler_samecid( | |
4558 | struct iscsi_conn *conn) | |
4559 | { | |
88dcd2da | 4560 | int sleep = cmpxchg(&conn->tx_thread_active, true, false); |
e48354ce NB |
4561 | |
4562 | atomic_set(&conn->conn_logout_remove, 0); | |
4563 | complete(&conn->conn_logout_comp); | |
4564 | ||
88dcd2da | 4565 | iscsit_cause_connection_reinstatement(conn, sleep); |
e48354ce NB |
4566 | iscsit_dec_conn_usage_count(conn); |
4567 | } | |
4568 | ||
4569 | static void iscsit_logout_post_handler_diffcid( | |
4570 | struct iscsi_conn *conn, | |
4571 | u16 cid) | |
4572 | { | |
4573 | struct iscsi_conn *l_conn; | |
4574 | struct iscsi_session *sess = conn->sess; | |
b53b0d99 | 4575 | bool conn_found = false; |
e48354ce NB |
4576 | |
4577 | if (!sess) | |
4578 | return; | |
4579 | ||
4580 | spin_lock_bh(&sess->conn_lock); | |
4581 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4582 | if (l_conn->cid == cid) { | |
4583 | iscsit_inc_conn_usage_count(l_conn); | |
b53b0d99 | 4584 | conn_found = true; |
e48354ce NB |
4585 | break; |
4586 | } | |
4587 | } | |
4588 | spin_unlock_bh(&sess->conn_lock); | |
4589 | ||
b53b0d99 | 4590 | if (!conn_found) |
e48354ce NB |
4591 | return; |
4592 | ||
4593 | if (l_conn->sock) | |
4594 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4595 | ||
4596 | spin_lock_bh(&l_conn->state_lock); | |
4597 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4598 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4599 | spin_unlock_bh(&l_conn->state_lock); | |
4600 | ||
4601 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4602 | iscsit_dec_conn_usage_count(l_conn); | |
4603 | } | |
4604 | ||
4605 | /* | |
4606 | * Return of 0 causes the TX thread to restart. | |
4607 | */ | |
2ec5a8c1 | 4608 | int iscsit_logout_post_handler( |
e48354ce NB |
4609 | struct iscsi_cmd *cmd, |
4610 | struct iscsi_conn *conn) | |
4611 | { | |
4612 | int ret = 0; | |
4613 | ||
4614 | switch (cmd->logout_reason) { | |
4615 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4616 | switch (cmd->logout_response) { | |
4617 | case ISCSI_LOGOUT_SUCCESS: | |
4618 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4619 | default: | |
4620 | iscsit_logout_post_handler_closesession(conn); | |
4621 | break; | |
4622 | } | |
4623 | ret = 0; | |
4624 | break; | |
4625 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4626 | if (conn->cid == cmd->logout_cid) { | |
4627 | switch (cmd->logout_response) { | |
4628 | case ISCSI_LOGOUT_SUCCESS: | |
4629 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4630 | default: | |
4631 | iscsit_logout_post_handler_samecid(conn); | |
4632 | break; | |
4633 | } | |
4634 | ret = 0; | |
4635 | } else { | |
4636 | switch (cmd->logout_response) { | |
4637 | case ISCSI_LOGOUT_SUCCESS: | |
4638 | iscsit_logout_post_handler_diffcid(conn, | |
4639 | cmd->logout_cid); | |
4640 | break; | |
4641 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4642 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4643 | default: | |
4644 | break; | |
4645 | } | |
4646 | ret = 1; | |
4647 | } | |
4648 | break; | |
4649 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4650 | switch (cmd->logout_response) { | |
4651 | case ISCSI_LOGOUT_SUCCESS: | |
4652 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4653 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4654 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4655 | default: | |
4656 | break; | |
4657 | } | |
4658 | ret = 1; | |
4659 | break; | |
4660 | default: | |
4661 | break; | |
4662 | ||
4663 | } | |
4664 | return ret; | |
4665 | } | |
2ec5a8c1 | 4666 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4667 | |
4668 | void iscsit_fail_session(struct iscsi_session *sess) | |
4669 | { | |
4670 | struct iscsi_conn *conn; | |
4671 | ||
4672 | spin_lock_bh(&sess->conn_lock); | |
4673 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4674 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4675 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4676 | } | |
4677 | spin_unlock_bh(&sess->conn_lock); | |
4678 | ||
4679 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4680 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4681 | } | |
4682 | ||
4683 | int iscsit_free_session(struct iscsi_session *sess) | |
4684 | { | |
4685 | u16 conn_count = atomic_read(&sess->nconn); | |
4686 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4687 | int is_last; | |
4688 | ||
4689 | spin_lock_bh(&sess->conn_lock); | |
4690 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4691 | ||
4692 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4693 | conn_list) { | |
4694 | if (conn_count == 0) | |
4695 | break; | |
4696 | ||
4697 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4698 | is_last = 1; | |
4699 | } else { | |
4700 | iscsit_inc_conn_usage_count(conn_tmp); | |
4701 | is_last = 0; | |
4702 | } | |
4703 | iscsit_inc_conn_usage_count(conn); | |
4704 | ||
4705 | spin_unlock_bh(&sess->conn_lock); | |
4706 | iscsit_cause_connection_reinstatement(conn, 1); | |
4707 | spin_lock_bh(&sess->conn_lock); | |
4708 | ||
4709 | iscsit_dec_conn_usage_count(conn); | |
4710 | if (is_last == 0) | |
4711 | iscsit_dec_conn_usage_count(conn_tmp); | |
4712 | ||
4713 | conn_count--; | |
4714 | } | |
4715 | ||
4716 | if (atomic_read(&sess->nconn)) { | |
4717 | spin_unlock_bh(&sess->conn_lock); | |
4718 | wait_for_completion(&sess->session_wait_comp); | |
4719 | } else | |
4720 | spin_unlock_bh(&sess->conn_lock); | |
4721 | ||
99367f01 | 4722 | target_put_session(sess->se_sess); |
e48354ce NB |
4723 | return 0; |
4724 | } | |
4725 | ||
4726 | void iscsit_stop_session( | |
4727 | struct iscsi_session *sess, | |
4728 | int session_sleep, | |
4729 | int connection_sleep) | |
4730 | { | |
4731 | u16 conn_count = atomic_read(&sess->nconn); | |
4732 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4733 | int is_last; | |
4734 | ||
4735 | spin_lock_bh(&sess->conn_lock); | |
4736 | if (session_sleep) | |
4737 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4738 | ||
4739 | if (connection_sleep) { | |
4740 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4741 | conn_list) { | |
4742 | if (conn_count == 0) | |
4743 | break; | |
4744 | ||
4745 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4746 | is_last = 1; | |
4747 | } else { | |
4748 | iscsit_inc_conn_usage_count(conn_tmp); | |
4749 | is_last = 0; | |
4750 | } | |
4751 | iscsit_inc_conn_usage_count(conn); | |
4752 | ||
4753 | spin_unlock_bh(&sess->conn_lock); | |
4754 | iscsit_cause_connection_reinstatement(conn, 1); | |
4755 | spin_lock_bh(&sess->conn_lock); | |
4756 | ||
4757 | iscsit_dec_conn_usage_count(conn); | |
4758 | if (is_last == 0) | |
4759 | iscsit_dec_conn_usage_count(conn_tmp); | |
4760 | conn_count--; | |
4761 | } | |
4762 | } else { | |
4763 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4764 | iscsit_cause_connection_reinstatement(conn, 0); | |
4765 | } | |
4766 | ||
4767 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4768 | spin_unlock_bh(&sess->conn_lock); | |
4769 | wait_for_completion(&sess->session_wait_comp); | |
4770 | } else | |
4771 | spin_unlock_bh(&sess->conn_lock); | |
4772 | } | |
4773 | ||
4774 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4775 | { | |
4776 | struct iscsi_session *sess; | |
4777 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4778 | struct se_session *se_sess, *se_sess_tmp; | |
4779 | int session_count = 0; | |
4780 | ||
4781 | spin_lock_bh(&se_tpg->session_lock); | |
4782 | if (tpg->nsessions && !force) { | |
4783 | spin_unlock_bh(&se_tpg->session_lock); | |
4784 | return -1; | |
4785 | } | |
4786 | ||
4787 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4788 | sess_list) { | |
4789 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4790 | ||
4791 | spin_lock(&sess->conn_lock); | |
4792 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4793 | atomic_read(&sess->session_logout) || | |
4794 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4795 | spin_unlock(&sess->conn_lock); | |
4796 | continue; | |
4797 | } | |
4798 | atomic_set(&sess->session_reinstatement, 1); | |
4799 | spin_unlock(&sess->conn_lock); | |
4800 | spin_unlock_bh(&se_tpg->session_lock); | |
4801 | ||
4802 | iscsit_free_session(sess); | |
4803 | spin_lock_bh(&se_tpg->session_lock); | |
4804 | ||
4805 | session_count++; | |
4806 | } | |
4807 | spin_unlock_bh(&se_tpg->session_lock); | |
4808 | ||
4809 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4810 | " Group: %hu\n", session_count, tpg->tpgt); | |
4811 | return 0; | |
4812 | } | |
4813 | ||
4814 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4815 | MODULE_VERSION("4.1.x"); | |
4816 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4817 | MODULE_LICENSE("GPL"); | |
4818 | ||
4819 | module_init(iscsi_target_init_module); | |
4820 | module_exit(iscsi_target_cleanup_module); |