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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains main functions related to the iSCSI Target Core Driver. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
5 | * |
6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ******************************************************************************/ | |
18 | ||
69110e3c | 19 | #include <crypto/hash.h> |
e48354ce NB |
20 | #include <linux/string.h> |
21 | #include <linux/kthread.h> | |
e48354ce | 22 | #include <linux/completion.h> |
827509e3 | 23 | #include <linux/module.h> |
5538d294 | 24 | #include <linux/vmalloc.h> |
40401530 | 25 | #include <linux/idr.h> |
8dcf07be | 26 | #include <linux/delay.h> |
e48354ce | 27 | #include <asm/unaligned.h> |
8dcf07be | 28 | #include <net/ipv6.h> |
ba929992 | 29 | #include <scsi/scsi_proto.h> |
e48354ce | 30 | #include <scsi/iscsi_proto.h> |
d28b1169 | 31 | #include <scsi/scsi_tcq.h> |
e48354ce | 32 | #include <target/target_core_base.h> |
c4795fb2 | 33 | #include <target/target_core_fabric.h> |
e48354ce | 34 | |
67f091f2 | 35 | #include <target/iscsi/iscsi_target_core.h> |
e48354ce NB |
36 | #include "iscsi_target_parameters.h" |
37 | #include "iscsi_target_seq_pdu_list.h" | |
e48354ce NB |
38 | #include "iscsi_target_datain_values.h" |
39 | #include "iscsi_target_erl0.h" | |
40 | #include "iscsi_target_erl1.h" | |
41 | #include "iscsi_target_erl2.h" | |
42 | #include "iscsi_target_login.h" | |
43 | #include "iscsi_target_tmr.h" | |
44 | #include "iscsi_target_tpg.h" | |
45 | #include "iscsi_target_util.h" | |
46 | #include "iscsi_target.h" | |
47 | #include "iscsi_target_device.h" | |
67f091f2 | 48 | #include <target/iscsi/iscsi_target_stat.h> |
e48354ce | 49 | |
baa4d64b NB |
50 | #include <target/iscsi/iscsi_transport.h> |
51 | ||
e48354ce NB |
52 | static LIST_HEAD(g_tiqn_list); |
53 | static LIST_HEAD(g_np_list); | |
54 | static DEFINE_SPINLOCK(tiqn_lock); | |
ee291e63 | 55 | static DEFINE_MUTEX(np_lock); |
e48354ce NB |
56 | |
57 | static struct idr tiqn_idr; | |
58 | struct idr sess_idr; | |
59 | struct mutex auth_id_lock; | |
60 | spinlock_t sess_idr_lock; | |
61 | ||
62 | struct iscsit_global *iscsit_global; | |
63 | ||
e48354ce NB |
64 | struct kmem_cache *lio_qr_cache; |
65 | struct kmem_cache *lio_dr_cache; | |
66 | struct kmem_cache *lio_ooo_cache; | |
67 | struct kmem_cache *lio_r2t_cache; | |
68 | ||
69 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
2ec5a8c1 | 70 | struct iscsi_scsi_req *, u32); |
e48354ce NB |
71 | |
72 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
73 | { | |
74 | struct iscsi_tiqn *tiqn = NULL; | |
75 | ||
76 | spin_lock(&tiqn_lock); | |
77 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
78 | if (!strcmp(tiqn->tiqn, buf)) { | |
79 | ||
80 | spin_lock(&tiqn->tiqn_state_lock); | |
81 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
82 | tiqn->tiqn_access_count++; | |
83 | spin_unlock(&tiqn->tiqn_state_lock); | |
84 | spin_unlock(&tiqn_lock); | |
85 | return tiqn; | |
86 | } | |
87 | spin_unlock(&tiqn->tiqn_state_lock); | |
88 | } | |
89 | } | |
90 | spin_unlock(&tiqn_lock); | |
91 | ||
92 | return NULL; | |
93 | } | |
94 | ||
95 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
96 | { | |
97 | spin_lock(&tiqn->tiqn_state_lock); | |
98 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
99 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
100 | spin_unlock(&tiqn->tiqn_state_lock); | |
101 | return 0; | |
102 | } | |
103 | spin_unlock(&tiqn->tiqn_state_lock); | |
104 | ||
105 | return -1; | |
106 | } | |
107 | ||
108 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
109 | { | |
110 | spin_lock(&tiqn->tiqn_state_lock); | |
111 | tiqn->tiqn_access_count--; | |
112 | spin_unlock(&tiqn->tiqn_state_lock); | |
113 | } | |
114 | ||
115 | /* | |
116 | * Note that IQN formatting is expected to be done in userspace, and | |
117 | * no explict IQN format checks are done here. | |
118 | */ | |
119 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
120 | { | |
121 | struct iscsi_tiqn *tiqn = NULL; | |
122 | int ret; | |
123 | ||
8f50c7f5 | 124 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
125 | pr_err("Target IQN exceeds %d bytes\n", |
126 | ISCSI_IQN_LEN); | |
127 | return ERR_PTR(-EINVAL); | |
128 | } | |
129 | ||
130 | tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); | |
131 | if (!tiqn) { | |
132 | pr_err("Unable to allocate struct iscsi_tiqn\n"); | |
133 | return ERR_PTR(-ENOMEM); | |
134 | } | |
135 | ||
136 | sprintf(tiqn->tiqn, "%s", buf); | |
137 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
138 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
139 | spin_lock_init(&tiqn->tiqn_state_lock); | |
140 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
141 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
142 | spin_lock_init(&tiqn->login_stats.lock); | |
143 | spin_lock_init(&tiqn->logout_stats.lock); | |
144 | ||
e48354ce NB |
145 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; |
146 | ||
c9365bd0 | 147 | idr_preload(GFP_KERNEL); |
e48354ce | 148 | spin_lock(&tiqn_lock); |
c9365bd0 TH |
149 | |
150 | ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); | |
e48354ce | 151 | if (ret < 0) { |
c9365bd0 | 152 | pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); |
e48354ce | 153 | spin_unlock(&tiqn_lock); |
c9365bd0 | 154 | idr_preload_end(); |
e48354ce NB |
155 | kfree(tiqn); |
156 | return ERR_PTR(ret); | |
157 | } | |
c9365bd0 | 158 | tiqn->tiqn_index = ret; |
e48354ce | 159 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); |
c9365bd0 | 160 | |
e48354ce | 161 | spin_unlock(&tiqn_lock); |
c9365bd0 | 162 | idr_preload_end(); |
e48354ce NB |
163 | |
164 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
165 | ||
166 | return tiqn; | |
167 | ||
168 | } | |
169 | ||
170 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
171 | { | |
172 | /* | |
173 | * Wait for accesses to said struct iscsi_tiqn to end. | |
174 | */ | |
175 | spin_lock(&tiqn->tiqn_state_lock); | |
176 | while (tiqn->tiqn_access_count != 0) { | |
177 | spin_unlock(&tiqn->tiqn_state_lock); | |
178 | msleep(10); | |
179 | spin_lock(&tiqn->tiqn_state_lock); | |
180 | } | |
181 | spin_unlock(&tiqn->tiqn_state_lock); | |
182 | } | |
183 | ||
184 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
185 | { | |
186 | /* | |
187 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
188 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
189 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
190 | * fabric and control code paths. | |
191 | */ | |
192 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
193 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
194 | return; | |
195 | } | |
196 | ||
197 | iscsit_wait_for_tiqn(tiqn); | |
198 | ||
199 | spin_lock(&tiqn_lock); | |
200 | list_del(&tiqn->tiqn_list); | |
201 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
202 | spin_unlock(&tiqn_lock); | |
203 | ||
204 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
205 | tiqn->tiqn); | |
206 | kfree(tiqn); | |
207 | } | |
208 | ||
209 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
210 | { | |
211 | int ret; | |
212 | /* | |
213 | * Determine if the network portal is accepting storage traffic. | |
214 | */ | |
215 | spin_lock_bh(&np->np_thread_lock); | |
216 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
217 | spin_unlock_bh(&np->np_thread_lock); | |
218 | return -1; | |
219 | } | |
e48354ce NB |
220 | spin_unlock_bh(&np->np_thread_lock); |
221 | /* | |
222 | * Determine if the portal group is accepting storage traffic. | |
223 | */ | |
224 | spin_lock_bh(&tpg->tpg_state_lock); | |
225 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
226 | spin_unlock_bh(&tpg->tpg_state_lock); | |
227 | return -1; | |
228 | } | |
229 | spin_unlock_bh(&tpg->tpg_state_lock); | |
230 | ||
231 | /* | |
232 | * Here we serialize access across the TIQN+TPG Tuple. | |
233 | */ | |
a91eb7d9 | 234 | ret = down_interruptible(&tpg->np_login_sem); |
ee7619f2 | 235 | if (ret != 0) |
e48354ce NB |
236 | return -1; |
237 | ||
a91eb7d9 NB |
238 | spin_lock_bh(&tpg->tpg_state_lock); |
239 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
240 | spin_unlock_bh(&tpg->tpg_state_lock); | |
241 | up(&tpg->np_login_sem); | |
242 | return -1; | |
243 | } | |
244 | spin_unlock_bh(&tpg->tpg_state_lock); | |
e48354ce NB |
245 | |
246 | return 0; | |
247 | } | |
248 | ||
a91eb7d9 NB |
249 | void iscsit_login_kref_put(struct kref *kref) |
250 | { | |
251 | struct iscsi_tpg_np *tpg_np = container_of(kref, | |
252 | struct iscsi_tpg_np, tpg_np_kref); | |
253 | ||
254 | complete(&tpg_np->tpg_np_comp); | |
255 | } | |
256 | ||
257 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg, | |
258 | struct iscsi_tpg_np *tpg_np) | |
e48354ce NB |
259 | { |
260 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
261 | ||
a91eb7d9 | 262 | up(&tpg->np_login_sem); |
e48354ce | 263 | |
a91eb7d9 NB |
264 | if (tpg_np) |
265 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
e48354ce NB |
266 | |
267 | if (tiqn) | |
268 | iscsit_put_tiqn_for_login(tiqn); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
05b96892 | 273 | bool iscsit_check_np_match( |
13a3cf08 | 274 | struct sockaddr_storage *sockaddr, |
05b96892 | 275 | struct iscsi_np *np, |
e48354ce NB |
276 | int network_transport) |
277 | { | |
278 | struct sockaddr_in *sock_in, *sock_in_e; | |
279 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
05b96892 | 280 | bool ip_match = false; |
69d75574 | 281 | u16 port, port_e; |
e48354ce | 282 | |
05b96892 NB |
283 | if (sockaddr->ss_family == AF_INET6) { |
284 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
285 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
286 | ||
287 | if (!memcmp(&sock_in6->sin6_addr.in6_u, | |
288 | &sock_in6_e->sin6_addr.in6_u, | |
289 | sizeof(struct in6_addr))) | |
290 | ip_match = true; | |
291 | ||
292 | port = ntohs(sock_in6->sin6_port); | |
69d75574 | 293 | port_e = ntohs(sock_in6_e->sin6_port); |
05b96892 NB |
294 | } else { |
295 | sock_in = (struct sockaddr_in *)sockaddr; | |
296 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
297 | ||
298 | if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) | |
299 | ip_match = true; | |
300 | ||
301 | port = ntohs(sock_in->sin_port); | |
69d75574 | 302 | port_e = ntohs(sock_in_e->sin_port); |
05b96892 NB |
303 | } |
304 | ||
69d75574 | 305 | if (ip_match && (port_e == port) && |
05b96892 NB |
306 | (np->np_network_transport == network_transport)) |
307 | return true; | |
308 | ||
309 | return false; | |
310 | } | |
311 | ||
ee291e63 AG |
312 | /* |
313 | * Called with mutex np_lock held | |
314 | */ | |
05b96892 | 315 | static struct iscsi_np *iscsit_get_np( |
13a3cf08 | 316 | struct sockaddr_storage *sockaddr, |
05b96892 NB |
317 | int network_transport) |
318 | { | |
319 | struct iscsi_np *np; | |
320 | bool match; | |
321 | ||
e48354ce | 322 | list_for_each_entry(np, &g_np_list, np_list) { |
ee291e63 | 323 | spin_lock_bh(&np->np_thread_lock); |
e48354ce | 324 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { |
ee291e63 | 325 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
326 | continue; |
327 | } | |
328 | ||
05b96892 | 329 | match = iscsit_check_np_match(sockaddr, np, network_transport); |
0bcc297e | 330 | if (match) { |
e48354ce NB |
331 | /* |
332 | * Increment the np_exports reference count now to | |
333 | * prevent iscsit_del_np() below from being called | |
334 | * while iscsi_tpg_add_network_portal() is called. | |
335 | */ | |
336 | np->np_exports++; | |
ee291e63 | 337 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce NB |
338 | return np; |
339 | } | |
ee291e63 | 340 | spin_unlock_bh(&np->np_thread_lock); |
e48354ce | 341 | } |
e48354ce NB |
342 | |
343 | return NULL; | |
344 | } | |
345 | ||
346 | struct iscsi_np *iscsit_add_np( | |
13a3cf08 | 347 | struct sockaddr_storage *sockaddr, |
e48354ce NB |
348 | int network_transport) |
349 | { | |
e48354ce NB |
350 | struct iscsi_np *np; |
351 | int ret; | |
ee291e63 AG |
352 | |
353 | mutex_lock(&np_lock); | |
354 | ||
e48354ce NB |
355 | /* |
356 | * Locate the existing struct iscsi_np if already active.. | |
357 | */ | |
358 | np = iscsit_get_np(sockaddr, network_transport); | |
ee291e63 AG |
359 | if (np) { |
360 | mutex_unlock(&np_lock); | |
e48354ce | 361 | return np; |
ee291e63 | 362 | } |
e48354ce NB |
363 | |
364 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
365 | if (!np) { | |
366 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
ee291e63 | 367 | mutex_unlock(&np_lock); |
e48354ce NB |
368 | return ERR_PTR(-ENOMEM); |
369 | } | |
370 | ||
371 | np->np_flags |= NPF_IP_NETWORK; | |
e48354ce NB |
372 | np->np_network_transport = network_transport; |
373 | spin_lock_init(&np->np_thread_lock); | |
374 | init_completion(&np->np_restart_comp); | |
375 | INIT_LIST_HEAD(&np->np_list); | |
376 | ||
377 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
378 | if (ret != 0) { | |
379 | kfree(np); | |
ee291e63 | 380 | mutex_unlock(&np_lock); |
e48354ce NB |
381 | return ERR_PTR(ret); |
382 | } | |
383 | ||
384 | np->np_thread = kthread_run(iscsi_target_login_thread, np, "iscsi_np"); | |
385 | if (IS_ERR(np->np_thread)) { | |
386 | pr_err("Unable to create kthread: iscsi_np\n"); | |
387 | ret = PTR_ERR(np->np_thread); | |
388 | kfree(np); | |
ee291e63 | 389 | mutex_unlock(&np_lock); |
e48354ce NB |
390 | return ERR_PTR(ret); |
391 | } | |
392 | /* | |
393 | * Increment the np_exports reference count now to prevent | |
394 | * iscsit_del_np() below from being run while a new call to | |
395 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
396 | * active. We don't need to hold np->np_thread_lock at this | |
397 | * point because iscsi_np has not been added to g_np_list yet. | |
398 | */ | |
399 | np->np_exports = 1; | |
ee291e63 | 400 | np->np_thread_state = ISCSI_NP_THREAD_ACTIVE; |
e48354ce | 401 | |
e48354ce | 402 | list_add_tail(&np->np_list, &g_np_list); |
ee291e63 | 403 | mutex_unlock(&np_lock); |
e48354ce | 404 | |
69d75574 AG |
405 | pr_debug("CORE[0] - Added Network Portal: %pISpc on %s\n", |
406 | &np->np_sockaddr, np->np_transport->name); | |
e48354ce NB |
407 | |
408 | return np; | |
409 | } | |
410 | ||
411 | int iscsit_reset_np_thread( | |
412 | struct iscsi_np *np, | |
413 | struct iscsi_tpg_np *tpg_np, | |
a91eb7d9 NB |
414 | struct iscsi_portal_group *tpg, |
415 | bool shutdown) | |
e48354ce NB |
416 | { |
417 | spin_lock_bh(&np->np_thread_lock); | |
e48354ce NB |
418 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { |
419 | spin_unlock_bh(&np->np_thread_lock); | |
420 | return 0; | |
421 | } | |
422 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
423 | ||
424 | if (np->np_thread) { | |
425 | spin_unlock_bh(&np->np_thread_lock); | |
426 | send_sig(SIGINT, np->np_thread, 1); | |
427 | wait_for_completion(&np->np_restart_comp); | |
428 | spin_lock_bh(&np->np_thread_lock); | |
429 | } | |
430 | spin_unlock_bh(&np->np_thread_lock); | |
431 | ||
a91eb7d9 NB |
432 | if (tpg_np && shutdown) { |
433 | kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put); | |
434 | ||
435 | wait_for_completion(&tpg_np->tpg_np_comp); | |
436 | } | |
437 | ||
e48354ce NB |
438 | return 0; |
439 | } | |
440 | ||
baa4d64b | 441 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 442 | { |
bf6932f4 AV |
443 | if (np->np_socket) |
444 | sock_release(np->np_socket); | |
e48354ce NB |
445 | } |
446 | ||
447 | int iscsit_del_np(struct iscsi_np *np) | |
448 | { | |
449 | spin_lock_bh(&np->np_thread_lock); | |
450 | np->np_exports--; | |
451 | if (np->np_exports) { | |
2363d196 | 452 | np->enabled = true; |
e48354ce NB |
453 | spin_unlock_bh(&np->np_thread_lock); |
454 | return 0; | |
455 | } | |
456 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
457 | spin_unlock_bh(&np->np_thread_lock); | |
458 | ||
459 | if (np->np_thread) { | |
460 | /* | |
461 | * We need to send the signal to wakeup Linux/Net | |
462 | * which may be sleeping in sock_accept().. | |
463 | */ | |
464 | send_sig(SIGINT, np->np_thread, 1); | |
465 | kthread_stop(np->np_thread); | |
db6077fd | 466 | np->np_thread = NULL; |
e48354ce | 467 | } |
baa4d64b NB |
468 | |
469 | np->np_transport->iscsit_free_np(np); | |
e48354ce | 470 | |
ee291e63 | 471 | mutex_lock(&np_lock); |
e48354ce | 472 | list_del(&np->np_list); |
ee291e63 | 473 | mutex_unlock(&np_lock); |
e48354ce | 474 | |
69d75574 AG |
475 | pr_debug("CORE[0] - Removed Network Portal: %pISpc on %s\n", |
476 | &np->np_sockaddr, np->np_transport->name); | |
e48354ce | 477 | |
baa4d64b | 478 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
479 | kfree(np); |
480 | return 0; | |
481 | } | |
482 | ||
e8205cca | 483 | static void iscsit_get_rx_pdu(struct iscsi_conn *); |
2ec5a8c1 | 484 | |
d2faaefb | 485 | int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
2ec5a8c1 NB |
486 | { |
487 | iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); | |
488 | return 0; | |
489 | } | |
d2faaefb | 490 | EXPORT_SYMBOL(iscsit_queue_rsp); |
2ec5a8c1 | 491 | |
d2faaefb | 492 | void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) |
131e6abc NB |
493 | { |
494 | bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD); | |
495 | ||
496 | spin_lock_bh(&conn->cmd_lock); | |
064cdd2d NB |
497 | if (!list_empty(&cmd->i_conn_node) && |
498 | !(cmd->se_cmd.transport_state & CMD_T_FABRIC_STOP)) | |
131e6abc NB |
499 | list_del_init(&cmd->i_conn_node); |
500 | spin_unlock_bh(&conn->cmd_lock); | |
501 | ||
502 | __iscsit_free_cmd(cmd, scsi_cmd, true); | |
503 | } | |
d2faaefb | 504 | EXPORT_SYMBOL(iscsit_aborted_task); |
131e6abc | 505 | |
2854bb23 VP |
506 | static void iscsit_do_crypto_hash_buf(struct ahash_request *, const void *, |
507 | u32, u32, u8 *, u8 *); | |
508 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *); | |
509 | ||
510 | static int | |
511 | iscsit_xmit_nondatain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
512 | const void *data_buf, u32 data_buf_len) | |
513 | { | |
514 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)cmd->pdu; | |
515 | struct kvec *iov; | |
516 | u32 niov = 0, tx_size = ISCSI_HDR_LEN; | |
517 | int ret; | |
518 | ||
519 | iov = &cmd->iov_misc[0]; | |
520 | iov[niov].iov_base = cmd->pdu; | |
521 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
522 | ||
523 | if (conn->conn_ops->HeaderDigest) { | |
524 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
525 | ||
526 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr, | |
527 | ISCSI_HDR_LEN, 0, NULL, | |
528 | (u8 *)header_digest); | |
529 | ||
530 | iov[0].iov_len += ISCSI_CRC_LEN; | |
531 | tx_size += ISCSI_CRC_LEN; | |
532 | pr_debug("Attaching CRC32C HeaderDigest" | |
533 | " to opcode 0x%x 0x%08x\n", | |
534 | hdr->opcode, *header_digest); | |
535 | } | |
536 | ||
537 | if (data_buf_len) { | |
538 | u32 padding = ((-data_buf_len) & 3); | |
539 | ||
540 | iov[niov].iov_base = (void *)data_buf; | |
541 | iov[niov++].iov_len = data_buf_len; | |
542 | tx_size += data_buf_len; | |
543 | ||
544 | if (padding != 0) { | |
545 | iov[niov].iov_base = &cmd->pad_bytes; | |
546 | iov[niov++].iov_len = padding; | |
547 | tx_size += padding; | |
548 | pr_debug("Attaching %u additional" | |
549 | " padding bytes.\n", padding); | |
550 | } | |
551 | ||
552 | if (conn->conn_ops->DataDigest) { | |
553 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, | |
554 | data_buf, data_buf_len, | |
555 | padding, | |
556 | (u8 *)&cmd->pad_bytes, | |
557 | (u8 *)&cmd->data_crc); | |
558 | ||
559 | iov[niov].iov_base = &cmd->data_crc; | |
560 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
561 | tx_size += ISCSI_CRC_LEN; | |
562 | pr_debug("Attached DataDigest for %u" | |
563 | " bytes opcode 0x%x, CRC 0x%08x\n", | |
564 | data_buf_len, hdr->opcode, cmd->data_crc); | |
565 | } | |
566 | } | |
567 | ||
568 | cmd->iov_misc_count = niov; | |
569 | cmd->tx_size = tx_size; | |
570 | ||
571 | ret = iscsit_send_tx_data(cmd, conn, 1); | |
572 | if (ret < 0) { | |
573 | iscsit_tx_thread_wait_for_tcp(conn); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static int iscsit_map_iovec(struct iscsi_cmd *, struct kvec *, u32, u32); | |
581 | static void iscsit_unmap_iovec(struct iscsi_cmd *); | |
582 | static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsi_cmd *, | |
583 | u32, u32, u32, u8 *); | |
584 | static int | |
585 | iscsit_xmit_datain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
586 | const struct iscsi_datain *datain) | |
587 | { | |
588 | struct kvec *iov; | |
589 | u32 iov_count = 0, tx_size = 0; | |
590 | int ret, iov_ret; | |
591 | ||
592 | iov = &cmd->iov_data[0]; | |
593 | iov[iov_count].iov_base = cmd->pdu; | |
594 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
595 | tx_size += ISCSI_HDR_LEN; | |
596 | ||
597 | if (conn->conn_ops->HeaderDigest) { | |
598 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
599 | ||
600 | iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu, | |
601 | ISCSI_HDR_LEN, 0, NULL, | |
602 | (u8 *)header_digest); | |
603 | ||
604 | iov[0].iov_len += ISCSI_CRC_LEN; | |
605 | tx_size += ISCSI_CRC_LEN; | |
606 | ||
607 | pr_debug("Attaching CRC32 HeaderDigest for DataIN PDU 0x%08x\n", | |
608 | *header_digest); | |
609 | } | |
610 | ||
611 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], | |
612 | datain->offset, datain->length); | |
613 | if (iov_ret < 0) | |
614 | return -1; | |
615 | ||
616 | iov_count += iov_ret; | |
617 | tx_size += datain->length; | |
618 | ||
619 | cmd->padding = ((-datain->length) & 3); | |
620 | if (cmd->padding) { | |
621 | iov[iov_count].iov_base = cmd->pad_bytes; | |
622 | iov[iov_count++].iov_len = cmd->padding; | |
623 | tx_size += cmd->padding; | |
624 | ||
625 | pr_debug("Attaching %u padding bytes\n", cmd->padding); | |
626 | } | |
627 | ||
628 | if (conn->conn_ops->DataDigest) { | |
629 | cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash, | |
630 | cmd, datain->offset, | |
631 | datain->length, | |
632 | cmd->padding, | |
633 | cmd->pad_bytes); | |
634 | ||
635 | iov[iov_count].iov_base = &cmd->data_crc; | |
636 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
637 | tx_size += ISCSI_CRC_LEN; | |
638 | ||
639 | pr_debug("Attached CRC32C DataDigest %d bytes, crc 0x%08x\n", | |
640 | datain->length + cmd->padding, cmd->data_crc); | |
641 | } | |
642 | ||
643 | cmd->iov_data_count = iov_count; | |
644 | cmd->tx_size = tx_size; | |
645 | ||
646 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
647 | ||
648 | iscsit_unmap_iovec(cmd); | |
649 | ||
650 | if (ret < 0) { | |
651 | iscsit_tx_thread_wait_for_tcp(conn); | |
652 | return ret; | |
653 | } | |
654 | ||
655 | return 0; | |
656 | } | |
657 | ||
658 | static int iscsit_xmit_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
659 | struct iscsi_datain_req *dr, const void *buf, | |
660 | u32 buf_len) | |
661 | { | |
662 | if (dr) | |
663 | return iscsit_xmit_datain_pdu(conn, cmd, buf); | |
664 | else | |
665 | return iscsit_xmit_nondatain_pdu(conn, cmd, buf, buf_len); | |
666 | } | |
667 | ||
e70beee7 NB |
668 | static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn) |
669 | { | |
670 | return TARGET_PROT_NORMAL; | |
671 | } | |
672 | ||
baa4d64b NB |
673 | static struct iscsit_transport iscsi_target_transport = { |
674 | .name = "iSCSI/TCP", | |
675 | .transport_type = ISCSI_TCP, | |
bd027d85 | 676 | .rdma_shutdown = false, |
baa4d64b NB |
677 | .owner = NULL, |
678 | .iscsit_setup_np = iscsit_setup_np, | |
679 | .iscsit_accept_np = iscsit_accept_np, | |
680 | .iscsit_free_np = iscsit_free_np, | |
681 | .iscsit_get_login_rx = iscsit_get_login_rx, | |
682 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 683 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
684 | .iscsit_immediate_queue = iscsit_immediate_queue, |
685 | .iscsit_response_queue = iscsit_response_queue, | |
686 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
687 | .iscsit_queue_status = iscsit_queue_rsp, | |
131e6abc | 688 | .iscsit_aborted_task = iscsit_aborted_task, |
2854bb23 | 689 | .iscsit_xmit_pdu = iscsit_xmit_pdu, |
e8205cca | 690 | .iscsit_get_rx_pdu = iscsit_get_rx_pdu, |
e70beee7 | 691 | .iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops, |
baa4d64b NB |
692 | }; |
693 | ||
e48354ce NB |
694 | static int __init iscsi_target_init_module(void) |
695 | { | |
88dcd2da | 696 | int ret = 0, size; |
e48354ce NB |
697 | |
698 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
699 | ||
700 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
701 | if (!iscsit_global) { | |
702 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
703 | return -1; | |
704 | } | |
88dcd2da | 705 | spin_lock_init(&iscsit_global->ts_bitmap_lock); |
e48354ce NB |
706 | mutex_init(&auth_id_lock); |
707 | spin_lock_init(&sess_idr_lock); | |
708 | idr_init(&tiqn_idr); | |
709 | idr_init(&sess_idr); | |
710 | ||
9ac8928e CH |
711 | ret = target_register_template(&iscsi_ops); |
712 | if (ret) | |
e48354ce NB |
713 | goto out; |
714 | ||
88dcd2da NB |
715 | size = BITS_TO_LONGS(ISCSIT_BITMAP_BITS) * sizeof(long); |
716 | iscsit_global->ts_bitmap = vzalloc(size); | |
717 | if (!iscsit_global->ts_bitmap) { | |
718 | pr_err("Unable to allocate iscsit_global->ts_bitmap\n"); | |
e48354ce | 719 | goto configfs_out; |
e48354ce NB |
720 | } |
721 | ||
e48354ce NB |
722 | lio_qr_cache = kmem_cache_create("lio_qr_cache", |
723 | sizeof(struct iscsi_queue_req), | |
724 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
725 | if (!lio_qr_cache) { | |
726 | pr_err("nable to kmem_cache_create() for" | |
727 | " lio_qr_cache\n"); | |
88dcd2da | 728 | goto bitmap_out; |
e48354ce NB |
729 | } |
730 | ||
731 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
732 | sizeof(struct iscsi_datain_req), | |
733 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
734 | if (!lio_dr_cache) { | |
735 | pr_err("Unable to kmem_cache_create() for" | |
736 | " lio_dr_cache\n"); | |
737 | goto qr_out; | |
738 | } | |
739 | ||
740 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
741 | sizeof(struct iscsi_ooo_cmdsn), | |
742 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
743 | if (!lio_ooo_cache) { | |
744 | pr_err("Unable to kmem_cache_create() for" | |
745 | " lio_ooo_cache\n"); | |
746 | goto dr_out; | |
747 | } | |
748 | ||
749 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
750 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
751 | 0, NULL); | |
752 | if (!lio_r2t_cache) { | |
753 | pr_err("Unable to kmem_cache_create() for" | |
754 | " lio_r2t_cache\n"); | |
755 | goto ooo_out; | |
756 | } | |
757 | ||
baa4d64b NB |
758 | iscsit_register_transport(&iscsi_target_transport); |
759 | ||
e48354ce NB |
760 | if (iscsit_load_discovery_tpg() < 0) |
761 | goto r2t_out; | |
762 | ||
763 | return ret; | |
764 | r2t_out: | |
7f2c53bb | 765 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
766 | kmem_cache_destroy(lio_r2t_cache); |
767 | ooo_out: | |
768 | kmem_cache_destroy(lio_ooo_cache); | |
769 | dr_out: | |
770 | kmem_cache_destroy(lio_dr_cache); | |
771 | qr_out: | |
772 | kmem_cache_destroy(lio_qr_cache); | |
88dcd2da NB |
773 | bitmap_out: |
774 | vfree(iscsit_global->ts_bitmap); | |
e48354ce | 775 | configfs_out: |
9ac8928e CH |
776 | /* XXX: this probably wants it to be it's own unwind step.. */ |
777 | if (iscsit_global->discovery_tpg) | |
778 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
779 | target_unregister_template(&iscsi_ops); | |
e48354ce NB |
780 | out: |
781 | kfree(iscsit_global); | |
782 | return -ENOMEM; | |
783 | } | |
784 | ||
785 | static void __exit iscsi_target_cleanup_module(void) | |
786 | { | |
e48354ce | 787 | iscsit_release_discovery_tpg(); |
baa4d64b | 788 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
789 | kmem_cache_destroy(lio_qr_cache); |
790 | kmem_cache_destroy(lio_dr_cache); | |
791 | kmem_cache_destroy(lio_ooo_cache); | |
792 | kmem_cache_destroy(lio_r2t_cache); | |
793 | ||
9ac8928e CH |
794 | /* |
795 | * Shutdown discovery sessions and disable discovery TPG | |
796 | */ | |
797 | if (iscsit_global->discovery_tpg) | |
798 | iscsit_tpg_disable_portal_group(iscsit_global->discovery_tpg, 1); | |
e48354ce | 799 | |
9ac8928e | 800 | target_unregister_template(&iscsi_ops); |
e48354ce | 801 | |
88dcd2da | 802 | vfree(iscsit_global->ts_bitmap); |
e48354ce NB |
803 | kfree(iscsit_global); |
804 | } | |
805 | ||
d2faaefb | 806 | int iscsit_add_reject( |
ba159914 | 807 | struct iscsi_conn *conn, |
e48354ce | 808 | u8 reason, |
ba159914 | 809 | unsigned char *buf) |
e48354ce NB |
810 | { |
811 | struct iscsi_cmd *cmd; | |
e48354ce | 812 | |
676687c6 | 813 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
e48354ce NB |
814 | if (!cmd) |
815 | return -1; | |
816 | ||
817 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 818 | cmd->reject_reason = reason; |
e48354ce | 819 | |
1c3d5794 | 820 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
821 | if (!cmd->buf_ptr) { |
822 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 823 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
824 | return -1; |
825 | } | |
e48354ce NB |
826 | |
827 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 828 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
829 | spin_unlock_bh(&conn->cmd_lock); |
830 | ||
831 | cmd->i_state = ISTATE_SEND_REJECT; | |
832 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
833 | ||
ba159914 | 834 | return -1; |
e48354ce | 835 | } |
d2faaefb | 836 | EXPORT_SYMBOL(iscsit_add_reject); |
e48354ce | 837 | |
ba159914 NB |
838 | static int iscsit_add_reject_from_cmd( |
839 | struct iscsi_cmd *cmd, | |
e48354ce | 840 | u8 reason, |
ba159914 NB |
841 | bool add_to_conn, |
842 | unsigned char *buf) | |
e48354ce NB |
843 | { |
844 | struct iscsi_conn *conn; | |
e48354ce NB |
845 | |
846 | if (!cmd->conn) { | |
847 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
848 | cmd->init_task_tag); | |
849 | return -1; | |
850 | } | |
851 | conn = cmd->conn; | |
852 | ||
853 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
ba159914 | 854 | cmd->reject_reason = reason; |
e48354ce | 855 | |
1c3d5794 | 856 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
857 | if (!cmd->buf_ptr) { |
858 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
aafc9d15 | 859 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
860 | return -1; |
861 | } | |
e48354ce NB |
862 | |
863 | if (add_to_conn) { | |
864 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 865 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
866 | spin_unlock_bh(&conn->cmd_lock); |
867 | } | |
868 | ||
869 | cmd->i_state = ISTATE_SEND_REJECT; | |
870 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
3e1c81a9 NB |
871 | /* |
872 | * Perform the kref_put now if se_cmd has already been setup by | |
873 | * scsit_setup_scsi_cmd() | |
874 | */ | |
875 | if (cmd->se_cmd.se_tfo != NULL) { | |
876 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); | |
afc16604 | 877 | target_put_sess_cmd(&cmd->se_cmd); |
3e1c81a9 | 878 | } |
ba159914 NB |
879 | return -1; |
880 | } | |
e48354ce | 881 | |
ba159914 NB |
882 | static int iscsit_add_reject_cmd(struct iscsi_cmd *cmd, u8 reason, |
883 | unsigned char *buf) | |
884 | { | |
885 | return iscsit_add_reject_from_cmd(cmd, reason, true, buf); | |
886 | } | |
887 | ||
888 | int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf) | |
889 | { | |
890 | return iscsit_add_reject_from_cmd(cmd, reason, false, buf); | |
e48354ce | 891 | } |
d2faaefb | 892 | EXPORT_SYMBOL(iscsit_reject_cmd); |
e48354ce NB |
893 | |
894 | /* | |
895 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 896 | * kernel sockets to copy data in/out. |
e48354ce NB |
897 | */ |
898 | static int iscsit_map_iovec( | |
899 | struct iscsi_cmd *cmd, | |
900 | struct kvec *iov, | |
901 | u32 data_offset, | |
902 | u32 data_length) | |
903 | { | |
904 | u32 i = 0; | |
905 | struct scatterlist *sg; | |
906 | unsigned int page_off; | |
907 | ||
908 | /* | |
bfb79eac | 909 | * We know each entry in t_data_sg contains a page. |
e48354ce | 910 | */ |
2b16509c IH |
911 | u32 ent = data_offset / PAGE_SIZE; |
912 | ||
913 | if (ent >= cmd->se_cmd.t_data_nents) { | |
914 | pr_err("Initial page entry out-of-bounds\n"); | |
915 | return -1; | |
916 | } | |
917 | ||
918 | sg = &cmd->se_cmd.t_data_sg[ent]; | |
e48354ce NB |
919 | page_off = (data_offset % PAGE_SIZE); |
920 | ||
921 | cmd->first_data_sg = sg; | |
922 | cmd->first_data_sg_off = page_off; | |
923 | ||
924 | while (data_length) { | |
925 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
926 | ||
927 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
928 | iov[i].iov_len = cur_len; | |
929 | ||
930 | data_length -= cur_len; | |
931 | page_off = 0; | |
932 | sg = sg_next(sg); | |
933 | i++; | |
934 | } | |
935 | ||
936 | cmd->kmapped_nents = i; | |
937 | ||
938 | return i; | |
939 | } | |
940 | ||
941 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
942 | { | |
943 | u32 i; | |
944 | struct scatterlist *sg; | |
945 | ||
946 | sg = cmd->first_data_sg; | |
947 | ||
948 | for (i = 0; i < cmd->kmapped_nents; i++) | |
949 | kunmap(sg_page(&sg[i])); | |
950 | } | |
951 | ||
952 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
953 | { | |
f56cbbb4 NB |
954 | LIST_HEAD(ack_list); |
955 | struct iscsi_cmd *cmd, *cmd_p; | |
e48354ce NB |
956 | |
957 | conn->exp_statsn = exp_statsn; | |
958 | ||
3e1c81a9 NB |
959 | if (conn->sess->sess_ops->RDMAExtensions) |
960 | return; | |
961 | ||
e48354ce | 962 | spin_lock_bh(&conn->cmd_lock); |
f56cbbb4 | 963 | list_for_each_entry_safe(cmd, cmd_p, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
964 | spin_lock(&cmd->istate_lock); |
965 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 966 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
967 | cmd->i_state = ISTATE_REMOVE; |
968 | spin_unlock(&cmd->istate_lock); | |
f56cbbb4 | 969 | list_move_tail(&cmd->i_conn_node, &ack_list); |
e48354ce NB |
970 | continue; |
971 | } | |
972 | spin_unlock(&cmd->istate_lock); | |
973 | } | |
974 | spin_unlock_bh(&conn->cmd_lock); | |
f56cbbb4 NB |
975 | |
976 | list_for_each_entry_safe(cmd, cmd_p, &ack_list, i_conn_node) { | |
5159d763 | 977 | list_del_init(&cmd->i_conn_node); |
f56cbbb4 NB |
978 | iscsit_free_cmd(cmd, false); |
979 | } | |
e48354ce NB |
980 | } |
981 | ||
982 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
983 | { | |
f80e8ed3 | 984 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 985 | |
c0427f15 | 986 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
987 | |
988 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
989 | if (!cmd->iov_data) { | |
990 | pr_err("Unable to allocate cmd->iov_data\n"); | |
991 | return -ENOMEM; | |
992 | } | |
993 | ||
994 | cmd->orig_iov_data_count = iov_count; | |
995 | return 0; | |
996 | } | |
997 | ||
3e1c81a9 NB |
998 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
999 | unsigned char *buf) | |
e48354ce | 1000 | { |
3e1c81a9 | 1001 | int data_direction, payload_length; |
e48354ce | 1002 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
1003 | int iscsi_task_attr; |
1004 | int sam_task_attr; | |
e48354ce | 1005 | |
04f3b31b | 1006 | atomic_long_inc(&conn->sess->cmd_pdus); |
e48354ce NB |
1007 | |
1008 | hdr = (struct iscsi_scsi_req *) buf; | |
1009 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
1010 | |
1011 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
1012 | ||
1013 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
1014 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
1015 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
1016 | " not set. Bad iSCSI Initiator.\n"); | |
ba159914 NB |
1017 | return iscsit_add_reject_cmd(cmd, |
1018 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1019 | } |
1020 | ||
1021 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
1022 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
1023 | /* | |
4454b66c NB |
1024 | * From RFC-3720 Section 10.3.1: |
1025 | * | |
1026 | * "Either or both of R and W MAY be 1 when either the | |
1027 | * Expected Data Transfer Length and/or Bidirectional Read | |
1028 | * Expected Data Transfer Length are 0" | |
1029 | * | |
1030 | * For this case, go ahead and clear the unnecssary bits | |
1031 | * to avoid any confusion with ->data_direction. | |
e48354ce | 1032 | */ |
4454b66c NB |
1033 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; |
1034 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
e48354ce | 1035 | |
4454b66c | 1036 | pr_warn("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" |
e48354ce | 1037 | " set when Expected Data Transfer Length is 0 for" |
4454b66c | 1038 | " CDB: 0x%02x, Fixing up flags\n", hdr->cdb[0]); |
e48354ce | 1039 | } |
e48354ce NB |
1040 | |
1041 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
1042 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
1043 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
1044 | " MUST be set if Expected Data Transfer Length is not 0." | |
1045 | " Bad iSCSI Initiator\n"); | |
ba159914 NB |
1046 | return iscsit_add_reject_cmd(cmd, |
1047 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1048 | } |
1049 | ||
1050 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
1051 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
1052 | pr_err("Bidirectional operations not supported!\n"); | |
ba159914 NB |
1053 | return iscsit_add_reject_cmd(cmd, |
1054 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1055 | } |
1056 | ||
1057 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1058 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
1059 | " Scsi Command PDU.\n"); | |
ba159914 NB |
1060 | return iscsit_add_reject_cmd(cmd, |
1061 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1062 | } |
1063 | ||
1064 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
1065 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
1066 | " protocol error.\n", payload_length); | |
ba159914 NB |
1067 | return iscsit_add_reject_cmd(cmd, |
1068 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1069 | } |
1070 | ||
ba159914 | 1071 | if ((be32_to_cpu(hdr->data_length) == payload_length) && |
e48354ce NB |
1072 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
1073 | pr_err("Expected Data Transfer Length and Length of" | |
1074 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
1075 | " bit is not set protocol error\n"); | |
ba159914 NB |
1076 | return iscsit_add_reject_cmd(cmd, |
1077 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1078 | } |
1079 | ||
50e5c87d | 1080 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
1081 | pr_err("DataSegmentLength: %u is greater than" |
1082 | " EDTL: %u, protocol error.\n", payload_length, | |
1083 | hdr->data_length); | |
ba159914 NB |
1084 | return iscsit_add_reject_cmd(cmd, |
1085 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1086 | } |
1087 | ||
21f5aa7e | 1088 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1089 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1090 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
1091 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1092 | return iscsit_add_reject_cmd(cmd, |
1093 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1094 | } |
1095 | ||
1096 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
1097 | pr_err("DataSegmentLength: %u is greater than" | |
1098 | " FirstBurstLength: %u, protocol error.\n", | |
1099 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
ba159914 NB |
1100 | return iscsit_add_reject_cmd(cmd, |
1101 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
1102 | } |
1103 | ||
1104 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
1105 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
1106 | DMA_NONE; | |
1107 | ||
d28b1169 | 1108 | cmd->data_direction = data_direction; |
d28b1169 AG |
1109 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
1110 | /* | |
1111 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
1112 | */ | |
1113 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
1114 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
68d81f40 | 1115 | sam_task_attr = TCM_SIMPLE_TAG; |
d28b1169 | 1116 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) |
68d81f40 | 1117 | sam_task_attr = TCM_ORDERED_TAG; |
d28b1169 | 1118 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) |
68d81f40 | 1119 | sam_task_attr = TCM_HEAD_TAG; |
d28b1169 | 1120 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) |
68d81f40 | 1121 | sam_task_attr = TCM_ACA_TAG; |
d28b1169 AG |
1122 | else { |
1123 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
68d81f40 CH |
1124 | " TCM_SIMPLE_TAG\n", iscsi_task_attr); |
1125 | sam_task_attr = TCM_SIMPLE_TAG; | |
d28b1169 AG |
1126 | } |
1127 | ||
e48354ce NB |
1128 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
1129 | cmd->i_state = ISTATE_NEW_CMD; | |
1130 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1131 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
1132 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
1133 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
1134 | if (cmd->unsolicited_data) | |
1135 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
1136 | ||
1137 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
9547308b | 1138 | if (hdr->flags & ISCSI_FLAG_CMD_READ) |
c1e34b64 | 1139 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); |
9547308b | 1140 | else |
e48354ce | 1141 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
50e5c87d CH |
1142 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1143 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1144 | cmd->first_burst_len = payload_length; |
1145 | ||
3e1c81a9 NB |
1146 | if (!conn->sess->sess_ops->RDMAExtensions && |
1147 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
1148 | struct iscsi_datain_req *dr; |
1149 | ||
1150 | dr = iscsit_allocate_datain_req(); | |
1151 | if (!dr) | |
ba159914 NB |
1152 | return iscsit_add_reject_cmd(cmd, |
1153 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1154 | |
1155 | iscsit_attach_datain_req(cmd, dr); | |
1156 | } | |
1157 | ||
065ca1e4 AG |
1158 | /* |
1159 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
1160 | */ | |
9ac8928e | 1161 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
50e5c87d CH |
1162 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
1163 | cmd->data_direction, sam_task_attr, | |
1164 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
1165 | |
1166 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
1167 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
1168 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
1169 | conn->cid); | |
1170 | ||
afc16604 | 1171 | target_get_sess_cmd(&cmd->se_cmd, true); |
065ca1e4 | 1172 | |
de103c93 CH |
1173 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
1174 | scsilun_to_int(&hdr->lun)); | |
1175 | if (cmd->sense_reason) | |
1176 | goto attach_cmd; | |
1177 | ||
649ee054 BVA |
1178 | /* only used for printks or comparing with ->ref_task_tag */ |
1179 | cmd->se_cmd.tag = (__force u32)cmd->init_task_tag; | |
de103c93 CH |
1180 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); |
1181 | if (cmd->sense_reason) { | |
1182 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
ba159914 NB |
1183 | return iscsit_add_reject_cmd(cmd, |
1184 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce | 1185 | } |
de103c93 | 1186 | |
e48354ce NB |
1187 | goto attach_cmd; |
1188 | } | |
a12f41f8 | 1189 | |
de103c93 | 1190 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
ba159914 NB |
1191 | return iscsit_add_reject_cmd(cmd, |
1192 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
e48354ce NB |
1193 | } |
1194 | ||
1195 | attach_cmd: | |
1196 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1197 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1198 | spin_unlock_bh(&conn->cmd_lock); |
1199 | /* | |
1200 | * Check if we need to delay processing because of ALUA | |
1201 | * Active/NonOptimized primary access state.. | |
1202 | */ | |
1203 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1204 | |
3e1c81a9 NB |
1205 | return 0; |
1206 | } | |
1207 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1208 | |
3e1c81a9 NB |
1209 | void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) |
1210 | { | |
1211 | iscsit_set_dataout_sequence_values(cmd); | |
1212 | ||
1213 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1214 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1215 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1216 | } | |
1217 | EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); | |
1218 | ||
1219 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1220 | struct iscsi_scsi_req *hdr) | |
1221 | { | |
1222 | int cmdsn_ret = 0; | |
e48354ce NB |
1223 | /* |
1224 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1225 | * the Immediate Bit is not set, and no Immediate | |
1226 | * Data is attached. | |
1227 | * | |
1228 | * A PDU/CmdSN carrying Immediate Data can only | |
1229 | * be processed after the DataCRC has passed. | |
1230 | * If the DataCRC fails, the CmdSN MUST NOT | |
1231 | * be acknowledged. (See below) | |
1232 | */ | |
1233 | if (!cmd->immediate_data) { | |
561bf158 NB |
1234 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1235 | (unsigned char *)hdr, hdr->cmdsn); | |
1236 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1237 | return -1; | |
1238 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
afc16604 | 1239 | target_put_sess_cmd(&cmd->se_cmd); |
7e32da55 | 1240 | return 0; |
3e1c81a9 | 1241 | } |
e48354ce NB |
1242 | } |
1243 | ||
50e5c87d | 1244 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1245 | |
1246 | /* | |
1247 | * If no Immediate Data is attached, it's OK to return now. | |
1248 | */ | |
1249 | if (!cmd->immediate_data) { | |
3e1c81a9 NB |
1250 | if (!cmd->sense_reason && cmd->unsolicited_data) |
1251 | iscsit_set_unsoliticed_dataout(cmd); | |
1252 | if (!cmd->sense_reason) | |
1253 | return 0; | |
e48354ce | 1254 | |
afc16604 | 1255 | target_put_sess_cmd(&cmd->se_cmd); |
e48354ce NB |
1256 | return 0; |
1257 | } | |
1258 | ||
1259 | /* | |
3e1c81a9 NB |
1260 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1261 | * execution. These exceptions are processed in CmdSN order using | |
1262 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1263 | */ |
de103c93 | 1264 | if (cmd->sense_reason) { |
561bf158 NB |
1265 | if (cmd->reject_reason) |
1266 | return 0; | |
1267 | ||
3e1c81a9 | 1268 | return 1; |
e48354ce NB |
1269 | } |
1270 | /* | |
1271 | * Call directly into transport_generic_new_cmd() to perform | |
1272 | * the backend memory allocation. | |
1273 | */ | |
de103c93 | 1274 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
561bf158 | 1275 | if (cmd->sense_reason) |
3e1c81a9 | 1276 | return 1; |
e48354ce | 1277 | |
3e1c81a9 NB |
1278 | return 0; |
1279 | } | |
1280 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1281 | ||
1282 | static int | |
1283 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1284 | bool dump_payload) | |
1285 | { | |
1286 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; | |
1287 | /* | |
1288 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1289 | */ | |
0bcc297e | 1290 | if (dump_payload) |
3e1c81a9 NB |
1291 | goto after_immediate_data; |
1292 | ||
1293 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1294 | cmd->first_burst_len); | |
e48354ce NB |
1295 | after_immediate_data: |
1296 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1297 | /* | |
1298 | * A PDU/CmdSN carrying Immediate Data passed | |
1299 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1300 | * Immediate Bit is not set. | |
1301 | */ | |
561bf158 NB |
1302 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, |
1303 | (unsigned char *)hdr, hdr->cmdsn); | |
9d86a2be | 1304 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
561bf158 | 1305 | return -1; |
3e1c81a9 | 1306 | |
9d86a2be | 1307 | if (cmd->sense_reason || cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
561bf158 NB |
1308 | int rc; |
1309 | ||
1310 | rc = iscsit_dump_data_payload(cmd->conn, | |
1311 | cmd->first_burst_len, 1); | |
afc16604 | 1312 | target_put_sess_cmd(&cmd->se_cmd); |
561bf158 | 1313 | return rc; |
3e1c81a9 NB |
1314 | } else if (cmd->unsolicited_data) |
1315 | iscsit_set_unsoliticed_dataout(cmd); | |
e48354ce | 1316 | |
e48354ce NB |
1317 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { |
1318 | /* | |
1319 | * Immediate Data failed DataCRC and ERL>=1, | |
1320 | * silently drop this PDU and let the initiator | |
1321 | * plug the CmdSN gap. | |
1322 | * | |
1323 | * FIXME: Send Unsolicited NOPIN with reserved | |
1324 | * TTT here to help the initiator figure out | |
1325 | * the missing CmdSN, although they should be | |
1326 | * intelligent enough to determine the missing | |
1327 | * CmdSN and issue a retry to plug the sequence. | |
1328 | */ | |
1329 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1330 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1331 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1332 | return -1; | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | ||
3e1c81a9 NB |
1337 | static int |
1338 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1339 | unsigned char *buf) | |
1340 | { | |
1341 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1342 | int rc, immed_data; | |
1343 | bool dump_payload = false; | |
1344 | ||
1345 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1346 | if (rc < 0) | |
561bf158 | 1347 | return 0; |
3e1c81a9 NB |
1348 | /* |
1349 | * Allocation iovecs needed for struct socket operations for | |
1350 | * traditional iSCSI block I/O. | |
1351 | */ | |
1352 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
b815fc12 | 1353 | return iscsit_reject_cmd(cmd, |
ba159914 | 1354 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); |
3e1c81a9 NB |
1355 | } |
1356 | immed_data = cmd->immediate_data; | |
1357 | ||
1358 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1359 | if (rc < 0) | |
1360 | return rc; | |
1361 | else if (rc > 0) | |
1362 | dump_payload = true; | |
1363 | ||
1364 | if (!immed_data) | |
1365 | return 0; | |
1366 | ||
1367 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1368 | } | |
1369 | ||
e48354ce | 1370 | static u32 iscsit_do_crypto_hash_sg( |
69110e3c | 1371 | struct ahash_request *hash, |
e48354ce NB |
1372 | struct iscsi_cmd *cmd, |
1373 | u32 data_offset, | |
1374 | u32 data_length, | |
1375 | u32 padding, | |
1376 | u8 *pad_bytes) | |
1377 | { | |
1378 | u32 data_crc; | |
e48354ce NB |
1379 | struct scatterlist *sg; |
1380 | unsigned int page_off; | |
1381 | ||
69110e3c | 1382 | crypto_ahash_init(hash); |
e48354ce NB |
1383 | |
1384 | sg = cmd->first_data_sg; | |
1385 | page_off = cmd->first_data_sg_off; | |
1386 | ||
e48354ce | 1387 | while (data_length) { |
aa75679c | 1388 | u32 cur_len = min_t(u32, data_length, (sg->length - page_off)); |
e48354ce | 1389 | |
69110e3c HX |
1390 | ahash_request_set_crypt(hash, sg, NULL, cur_len); |
1391 | crypto_ahash_update(hash); | |
e48354ce NB |
1392 | |
1393 | data_length -= cur_len; | |
1394 | page_off = 0; | |
aa75679c AP |
1395 | /* iscsit_map_iovec has already checked for invalid sg pointers */ |
1396 | sg = sg_next(sg); | |
e48354ce NB |
1397 | } |
1398 | ||
1399 | if (padding) { | |
1400 | struct scatterlist pad_sg; | |
1401 | ||
1402 | sg_init_one(&pad_sg, pad_bytes, padding); | |
69110e3c HX |
1403 | ahash_request_set_crypt(hash, &pad_sg, (u8 *)&data_crc, |
1404 | padding); | |
1405 | crypto_ahash_finup(hash); | |
1406 | } else { | |
1407 | ahash_request_set_crypt(hash, NULL, (u8 *)&data_crc, 0); | |
1408 | crypto_ahash_final(hash); | |
e48354ce | 1409 | } |
e48354ce NB |
1410 | |
1411 | return data_crc; | |
1412 | } | |
1413 | ||
1414 | static void iscsit_do_crypto_hash_buf( | |
69110e3c | 1415 | struct ahash_request *hash, |
80690fdb | 1416 | const void *buf, |
e48354ce NB |
1417 | u32 payload_length, |
1418 | u32 padding, | |
1419 | u8 *pad_bytes, | |
1420 | u8 *data_crc) | |
1421 | { | |
69110e3c | 1422 | struct scatterlist sg[2]; |
e48354ce | 1423 | |
69110e3c HX |
1424 | sg_init_table(sg, ARRAY_SIZE(sg)); |
1425 | sg_set_buf(sg, buf, payload_length); | |
1426 | sg_set_buf(sg + 1, pad_bytes, padding); | |
e48354ce | 1427 | |
69110e3c | 1428 | ahash_request_set_crypt(hash, sg, data_crc, payload_length + padding); |
e48354ce | 1429 | |
69110e3c | 1430 | crypto_ahash_digest(hash); |
e48354ce NB |
1431 | } |
1432 | ||
3e1c81a9 NB |
1433 | int |
1434 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, | |
1435 | struct iscsi_cmd **out_cmd) | |
e48354ce | 1436 | { |
3e1c81a9 | 1437 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
e48354ce NB |
1438 | struct iscsi_cmd *cmd = NULL; |
1439 | struct se_cmd *se_cmd; | |
3e1c81a9 NB |
1440 | u32 payload_length = ntoh24(hdr->dlength); |
1441 | int rc; | |
e48354ce NB |
1442 | |
1443 | if (!payload_length) { | |
dbcbc95c NB |
1444 | pr_warn("DataOUT payload is ZERO, ignoring.\n"); |
1445 | return 0; | |
e48354ce NB |
1446 | } |
1447 | ||
1448 | /* iSCSI write */ | |
04f3b31b | 1449 | atomic_long_add(payload_length, &conn->sess->rx_data_octets); |
e48354ce | 1450 | |
21f5aa7e | 1451 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1452 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1453 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1454 | conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
1455 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
1456 | buf); | |
e48354ce NB |
1457 | } |
1458 | ||
1459 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1460 | payload_length); | |
1461 | if (!cmd) | |
1462 | return 0; | |
1463 | ||
1464 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1465 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1466 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1467 | payload_length, conn->cid); |
1468 | ||
1469 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1470 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1471 | " last DataOUT received, dumping payload\n", | |
1472 | cmd->init_task_tag); | |
1473 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1474 | } | |
1475 | ||
1476 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1477 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1478 | " NON-WRITE command.\n", cmd->init_task_tag); | |
97c99b47 | 1479 | return iscsit_dump_data_payload(conn, payload_length, 1); |
e48354ce NB |
1480 | } |
1481 | se_cmd = &cmd->se_cmd; | |
1482 | iscsit_mod_dataout_timer(cmd); | |
1483 | ||
50e5c87d | 1484 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1485 | pr_err("DataOut Offset: %u, Length %u greater than" |
1486 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1487 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
ba159914 | 1488 | return iscsit_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_INVALID, buf); |
e48354ce NB |
1489 | } |
1490 | ||
1491 | if (cmd->unsolicited_data) { | |
1492 | int dump_unsolicited_data = 0; | |
1493 | ||
1494 | if (conn->sess->sess_ops->InitialR2T) { | |
1495 | pr_err("Received unexpected unsolicited data" | |
1496 | " while InitialR2T=Yes, protocol error.\n"); | |
1497 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1498 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1499 | return -1; | |
1500 | } | |
1501 | /* | |
1502 | * Special case for dealing with Unsolicited DataOUT | |
1503 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1504 | * failures; | |
1505 | */ | |
1506 | ||
1507 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
e48354ce | 1508 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); |
de103c93 | 1509 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce | 1510 | dump_unsolicited_data = 1; |
e48354ce NB |
1511 | |
1512 | if (dump_unsolicited_data) { | |
1513 | /* | |
1514 | * Check if a delayed TASK_ABORTED status needs to | |
1515 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
5a342521 | 1516 | * received with the unsolicited data out. |
e48354ce NB |
1517 | */ |
1518 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1519 | iscsit_stop_dataout_timer(cmd); | |
1520 | ||
1521 | transport_check_aborted_status(se_cmd, | |
1522 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1523 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1524 | } | |
1525 | } else { | |
1526 | /* | |
1527 | * For the normal solicited data path: | |
1528 | * | |
1529 | * Check for a delayed TASK_ABORTED status and dump any | |
1530 | * incoming data out payload if one exists. Also, when the | |
1531 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1532 | * data out sequence, we decrement outstanding_r2ts. Once | |
1533 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1534 | * TASK_ABORTED status. | |
1535 | */ | |
7d680f3b | 1536 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1537 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1538 | if (--cmd->outstanding_r2ts < 1) { | |
1539 | iscsit_stop_dataout_timer(cmd); | |
1540 | transport_check_aborted_status( | |
1541 | se_cmd, 1); | |
1542 | } | |
1543 | ||
1544 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1545 | } | |
1546 | } | |
1547 | /* | |
1548 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1549 | * within-command recovery checks before receiving the payload. | |
1550 | */ | |
3e1c81a9 NB |
1551 | rc = iscsit_check_pre_dataout(cmd, buf); |
1552 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1553 | return 0; |
3e1c81a9 | 1554 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce NB |
1555 | return -1; |
1556 | ||
3e1c81a9 NB |
1557 | *out_cmd = cmd; |
1558 | return 0; | |
1559 | } | |
1560 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); | |
1561 | ||
1562 | static int | |
1563 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1564 | struct iscsi_data *hdr) | |
1565 | { | |
1566 | struct kvec *iov; | |
1567 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1568 | u32 payload_length = ntoh24(hdr->dlength); | |
1569 | int iov_ret, data_crc_failed = 0; | |
1570 | ||
e48354ce NB |
1571 | rx_size += payload_length; |
1572 | iov = &cmd->iov_data[0]; | |
1573 | ||
50e5c87d CH |
1574 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1575 | payload_length); | |
e48354ce NB |
1576 | if (iov_ret < 0) |
1577 | return -1; | |
1578 | ||
1579 | iov_count += iov_ret; | |
1580 | ||
1581 | padding = ((-payload_length) & 3); | |
1582 | if (padding != 0) { | |
1583 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1584 | iov[iov_count++].iov_len = padding; | |
1585 | rx_size += padding; | |
1586 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1587 | } | |
1588 | ||
1589 | if (conn->conn_ops->DataDigest) { | |
1590 | iov[iov_count].iov_base = &checksum; | |
1591 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1592 | rx_size += ISCSI_CRC_LEN; | |
1593 | } | |
1594 | ||
1595 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1596 | ||
1597 | iscsit_unmap_iovec(cmd); | |
1598 | ||
1599 | if (rx_got != rx_size) | |
1600 | return -1; | |
1601 | ||
1602 | if (conn->conn_ops->DataDigest) { | |
1603 | u32 data_crc; | |
1604 | ||
69110e3c | 1605 | data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd, |
50e5c87d CH |
1606 | be32_to_cpu(hdr->offset), |
1607 | payload_length, padding, | |
e48354ce NB |
1608 | cmd->pad_bytes); |
1609 | ||
1610 | if (checksum != data_crc) { | |
1611 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1612 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1613 | " does not match computed 0x%08x\n", | |
1614 | hdr->itt, hdr->offset, payload_length, | |
1615 | hdr->datasn, checksum, data_crc); | |
1616 | data_crc_failed = 1; | |
1617 | } else { | |
1618 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1619 | " %u bytes of Data Out\n", checksum, | |
1620 | payload_length); | |
1621 | } | |
1622 | } | |
3e1c81a9 NB |
1623 | |
1624 | return data_crc_failed; | |
1625 | } | |
1626 | ||
1627 | int | |
1628 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1629 | bool data_crc_failed) | |
1630 | { | |
1631 | struct iscsi_conn *conn = cmd->conn; | |
1632 | int rc, ooo_cmdsn; | |
e48354ce NB |
1633 | /* |
1634 | * Increment post receive data and CRC values or perform | |
1635 | * within-command recovery. | |
1636 | */ | |
3e1c81a9 NB |
1637 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1638 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1639 | return 0; |
3e1c81a9 | 1640 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1641 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1642 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1643 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1644 | /* |
1645 | * Handle extra special case for out of order | |
1646 | * Unsolicited Data Out. | |
1647 | */ | |
1648 | spin_lock_bh(&cmd->istate_lock); | |
1649 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1650 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1651 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1652 | spin_unlock_bh(&cmd->istate_lock); | |
1653 | ||
1654 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1655 | if (ooo_cmdsn) |
1656 | return 0; | |
1657 | target_execute_cmd(&cmd->se_cmd); | |
1658 | return 0; | |
e48354ce NB |
1659 | } else /* DATAOUT_CANNOT_RECOVER */ |
1660 | return -1; | |
1661 | ||
1662 | return 0; | |
1663 | } | |
3e1c81a9 | 1664 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1665 | |
3e1c81a9 NB |
1666 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1667 | { | |
dbcbc95c | 1668 | struct iscsi_cmd *cmd = NULL; |
3e1c81a9 NB |
1669 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
1670 | int rc; | |
1671 | bool data_crc_failed = false; | |
1672 | ||
1673 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1674 | if (rc < 0) | |
561bf158 | 1675 | return 0; |
3e1c81a9 NB |
1676 | else if (!cmd) |
1677 | return 0; | |
1678 | ||
1679 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1680 | if (rc < 0) | |
1681 | return rc; | |
1682 | else if (rc > 0) | |
1683 | data_crc_failed = true; | |
1684 | ||
1685 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1686 | } | |
1687 | ||
778de368 NB |
1688 | int iscsit_setup_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
1689 | struct iscsi_nopout *hdr) | |
e48354ce | 1690 | { |
778de368 | 1691 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 1692 | |
a3662605 AH |
1693 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { |
1694 | pr_err("NopOUT Flag's, Left Most Bit not set, protocol error.\n"); | |
1695 | if (!cmd) | |
1696 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1697 | (unsigned char *)hdr); | |
1698 | ||
1699 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, | |
1700 | (unsigned char *)hdr); | |
1701 | } | |
1702 | ||
66c7db68 | 1703 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1704 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1705 | " not set, protocol error.\n"); | |
28aaa950 NB |
1706 | if (!cmd) |
1707 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1708 | (unsigned char *)hdr); | |
1709 | ||
ba159914 NB |
1710 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1711 | (unsigned char *)hdr); | |
e48354ce NB |
1712 | } |
1713 | ||
21f5aa7e | 1714 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1715 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1716 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1717 | " error.\n", payload_length, |
21f5aa7e | 1718 | conn->conn_ops->MaxXmitDataSegmentLength); |
28aaa950 NB |
1719 | if (!cmd) |
1720 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1721 | (unsigned char *)hdr); | |
1722 | ||
ba159914 NB |
1723 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
1724 | (unsigned char *)hdr); | |
e48354ce NB |
1725 | } |
1726 | ||
3e1c81a9 | 1727 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1728 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1729 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1730 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1731 | payload_length); | |
1732 | /* | |
1733 | * This is not a response to a Unsolicited NopIN, which means | |
1734 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1735 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1736 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1737 | * can contain ping data. | |
1738 | */ | |
50e5c87d | 1739 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1740 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; |
1741 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1742 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1743 | 1 : 0); | |
1744 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1745 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1746 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1747 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1748 | cmd->data_direction = DMA_NONE; |
1749 | } | |
1750 | ||
778de368 NB |
1751 | return 0; |
1752 | } | |
1753 | EXPORT_SYMBOL(iscsit_setup_nop_out); | |
1754 | ||
1755 | int iscsit_process_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1756 | struct iscsi_nopout *hdr) | |
1757 | { | |
1758 | struct iscsi_cmd *cmd_p = NULL; | |
1759 | int cmdsn_ret = 0; | |
1760 | /* | |
1761 | * Initiator is expecting a NopIN ping reply.. | |
1762 | */ | |
1763 | if (hdr->itt != RESERVED_ITT) { | |
7cbfcc95 NB |
1764 | if (!cmd) |
1765 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, | |
1766 | (unsigned char *)hdr); | |
778de368 NB |
1767 | |
1768 | spin_lock_bh(&conn->cmd_lock); | |
1769 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
1770 | spin_unlock_bh(&conn->cmd_lock); | |
1771 | ||
1772 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); | |
1773 | ||
1774 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1775 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1776 | cmd->i_state); | |
1777 | return 0; | |
1778 | } | |
1779 | ||
561bf158 NB |
1780 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
1781 | (unsigned char *)hdr, hdr->cmdsn); | |
778de368 NB |
1782 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
1783 | return 0; | |
778de368 | 1784 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 1785 | return -1; |
778de368 NB |
1786 | |
1787 | return 0; | |
1788 | } | |
1789 | /* | |
1790 | * This was a response to a unsolicited NOPIN ping. | |
1791 | */ | |
1792 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { | |
1793 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); | |
1794 | if (!cmd_p) | |
1795 | return -EINVAL; | |
1796 | ||
1797 | iscsit_stop_nopin_response_timer(conn); | |
1798 | ||
1799 | cmd_p->i_state = ISTATE_REMOVE; | |
1800 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
1801 | ||
1802 | iscsit_start_nopin_timer(conn); | |
1803 | return 0; | |
1804 | } | |
1805 | /* | |
1806 | * Otherwise, initiator is not expecting a NOPIN is response. | |
1807 | * Just ignore for now. | |
1808 | */ | |
1a40f0a3 VP |
1809 | |
1810 | if (cmd) | |
1811 | iscsit_free_cmd(cmd, false); | |
1812 | ||
778de368 NB |
1813 | return 0; |
1814 | } | |
1815 | EXPORT_SYMBOL(iscsit_process_nop_out); | |
1816 | ||
1817 | static int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1818 | unsigned char *buf) | |
1819 | { | |
1820 | unsigned char *ping_data = NULL; | |
1821 | struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; | |
1822 | struct kvec *iov = NULL; | |
1823 | u32 payload_length = ntoh24(hdr->dlength); | |
1824 | int ret; | |
1825 | ||
1826 | ret = iscsit_setup_nop_out(conn, cmd, hdr); | |
1827 | if (ret < 0) | |
561bf158 | 1828 | return 0; |
778de368 NB |
1829 | /* |
1830 | * Handle NOP-OUT payload for traditional iSCSI sockets | |
1831 | */ | |
50e5c87d | 1832 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
778de368 NB |
1833 | u32 checksum, data_crc, padding = 0; |
1834 | int niov = 0, rx_got, rx_size = payload_length; | |
1835 | ||
e48354ce NB |
1836 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); |
1837 | if (!ping_data) { | |
1838 | pr_err("Unable to allocate memory for" | |
1839 | " NOPOUT ping data.\n"); | |
1840 | ret = -1; | |
1841 | goto out; | |
1842 | } | |
1843 | ||
1844 | iov = &cmd->iov_misc[0]; | |
1845 | iov[niov].iov_base = ping_data; | |
1846 | iov[niov++].iov_len = payload_length; | |
1847 | ||
1848 | padding = ((-payload_length) & 3); | |
1849 | if (padding != 0) { | |
1850 | pr_debug("Receiving %u additional bytes" | |
1851 | " for padding.\n", padding); | |
1852 | iov[niov].iov_base = &cmd->pad_bytes; | |
1853 | iov[niov++].iov_len = padding; | |
1854 | rx_size += padding; | |
1855 | } | |
1856 | if (conn->conn_ops->DataDigest) { | |
1857 | iov[niov].iov_base = &checksum; | |
1858 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1859 | rx_size += ISCSI_CRC_LEN; | |
1860 | } | |
1861 | ||
1862 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1863 | if (rx_got != rx_size) { | |
1864 | ret = -1; | |
1865 | goto out; | |
1866 | } | |
1867 | ||
1868 | if (conn->conn_ops->DataDigest) { | |
69110e3c | 1869 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
e48354ce NB |
1870 | ping_data, payload_length, |
1871 | padding, cmd->pad_bytes, | |
1872 | (u8 *)&data_crc); | |
1873 | ||
1874 | if (checksum != data_crc) { | |
1875 | pr_err("Ping data CRC32C DataDigest" | |
1876 | " 0x%08x does not match computed 0x%08x\n", | |
1877 | checksum, data_crc); | |
1878 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1879 | pr_err("Unable to recover from" | |
1880 | " NOPOUT Ping DataCRC failure while in" | |
1881 | " ERL=0.\n"); | |
1882 | ret = -1; | |
1883 | goto out; | |
1884 | } else { | |
1885 | /* | |
1886 | * Silently drop this PDU and let the | |
1887 | * initiator plug the CmdSN gap. | |
1888 | */ | |
1889 | pr_debug("Dropping NOPOUT" | |
1890 | " Command CmdSN: 0x%08x due to" | |
1891 | " DataCRC error.\n", hdr->cmdsn); | |
1892 | ret = 0; | |
1893 | goto out; | |
1894 | } | |
1895 | } else { | |
1896 | pr_debug("Got CRC32C DataDigest" | |
1897 | " 0x%08x for %u bytes of ping data.\n", | |
1898 | checksum, payload_length); | |
1899 | } | |
1900 | } | |
1901 | ||
1902 | ping_data[payload_length] = '\0'; | |
1903 | /* | |
1904 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1905 | */ | |
8359cf43 | 1906 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1907 | cmd->buf_ptr_size = payload_length; |
1908 | ||
1909 | pr_debug("Got %u bytes of NOPOUT ping" | |
1910 | " data.\n", payload_length); | |
1911 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1912 | } | |
1913 | ||
778de368 | 1914 | return iscsit_process_nop_out(conn, cmd, hdr); |
e48354ce NB |
1915 | out: |
1916 | if (cmd) | |
aafc9d15 | 1917 | iscsit_free_cmd(cmd, false); |
778de368 | 1918 | |
e48354ce NB |
1919 | kfree(ping_data); |
1920 | return ret; | |
1921 | } | |
1922 | ||
3e1c81a9 NB |
1923 | int |
1924 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1925 | unsigned char *buf) | |
e48354ce | 1926 | { |
e48354ce NB |
1927 | struct se_tmr_req *se_tmr; |
1928 | struct iscsi_tmr_req *tmr_req; | |
1929 | struct iscsi_tm *hdr; | |
186a9647 NB |
1930 | int out_of_order_cmdsn = 0, ret; |
1931 | bool sess_ref = false; | |
e48354ce NB |
1932 | u8 function; |
1933 | ||
1934 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1935 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1936 | function = hdr->flags; | |
1937 | ||
1938 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1939 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1940 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1941 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1942 | ||
1943 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1944 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1945 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1946 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1947 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1948 | } |
1949 | ||
1950 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1951 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1952 | pr_err("Task Management Request TASK_REASSIGN not" | |
1953 | " issued as immediate command, bad iSCSI Initiator" | |
1954 | "implementation\n"); | |
ba159914 NB |
1955 | return iscsit_add_reject_cmd(cmd, |
1956 | ISCSI_REASON_PROTOCOL_ERROR, buf); | |
e48354ce NB |
1957 | } |
1958 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1959 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1960 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1961 | |
d28b1169 AG |
1962 | cmd->data_direction = DMA_NONE; |
1963 | ||
1964 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1965 | if (!cmd->tmr_req) { | |
1966 | pr_err("Unable to allocate memory for" | |
1967 | " Task Management command!\n"); | |
ba159914 NB |
1968 | return iscsit_add_reject_cmd(cmd, |
1969 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1970 | buf); | |
d28b1169 AG |
1971 | } |
1972 | ||
1973 | /* | |
1974 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1975 | * LIO-Target $FABRIC_MOD | |
1976 | */ | |
1977 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1978 | ||
1979 | u8 tcm_function; | |
1980 | int ret; | |
1981 | ||
9ac8928e | 1982 | transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, |
d28b1169 | 1983 | conn->sess->se_sess, 0, DMA_NONE, |
68d81f40 | 1984 | TCM_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 | 1985 | |
afc16604 | 1986 | target_get_sess_cmd(&cmd->se_cmd, true); |
186a9647 NB |
1987 | sess_ref = true; |
1988 | ||
d28b1169 AG |
1989 | switch (function) { |
1990 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1991 | tcm_function = TMR_ABORT_TASK; | |
1992 | break; | |
1993 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1994 | tcm_function = TMR_ABORT_TASK_SET; | |
1995 | break; | |
1996 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1997 | tcm_function = TMR_CLEAR_ACA; | |
1998 | break; | |
1999 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
2000 | tcm_function = TMR_CLEAR_TASK_SET; | |
2001 | break; | |
2002 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
2003 | tcm_function = TMR_LUN_RESET; | |
2004 | break; | |
2005 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
2006 | tcm_function = TMR_TARGET_WARM_RESET; | |
2007 | break; | |
2008 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
2009 | tcm_function = TMR_TARGET_COLD_RESET; | |
2010 | break; | |
2011 | default: | |
2012 | pr_err("Unknown iSCSI TMR Function:" | |
2013 | " 0x%02x\n", function); | |
ba159914 NB |
2014 | return iscsit_add_reject_cmd(cmd, |
2015 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
2016 | } |
2017 | ||
2018 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
2019 | tcm_function, GFP_KERNEL); | |
2020 | if (ret < 0) | |
ba159914 NB |
2021 | return iscsit_add_reject_cmd(cmd, |
2022 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
d28b1169 AG |
2023 | |
2024 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
2025 | } | |
e48354ce NB |
2026 | |
2027 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
2028 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
2029 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2030 | cmd->init_task_tag = hdr->itt; | |
2031 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2032 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2033 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
2034 | se_tmr = cmd->se_cmd.se_tmr_req; |
2035 | tmr_req = cmd->tmr_req; | |
2036 | /* | |
2037 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
2038 | */ | |
2039 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
2040 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
2041 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 2042 | if (ret < 0) { |
e48354ce NB |
2043 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
2044 | goto attach; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | switch (function) { | |
2049 | case ISCSI_TM_FUNC_ABORT_TASK: | |
2050 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 2051 | if (se_tmr->response) |
e48354ce | 2052 | goto attach; |
e48354ce NB |
2053 | break; |
2054 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
2055 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
2056 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
2057 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
2058 | break; | |
2059 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
2060 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
2061 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
2062 | goto attach; | |
2063 | } | |
2064 | break; | |
2065 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
2066 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
2067 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
2068 | goto attach; | |
2069 | } | |
2070 | break; | |
2071 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
2072 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
2073 | /* | |
2074 | * Perform sanity checks on the ExpDataSN only if the | |
2075 | * TASK_REASSIGN was successful. | |
2076 | */ | |
de103c93 | 2077 | if (se_tmr->response) |
e48354ce NB |
2078 | break; |
2079 | ||
2080 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
ba159914 NB |
2081 | return iscsit_add_reject_cmd(cmd, |
2082 | ISCSI_REASON_BOOKMARK_INVALID, buf); | |
e48354ce NB |
2083 | break; |
2084 | default: | |
2085 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
2086 | " error.\n", function); | |
e48354ce NB |
2087 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
2088 | goto attach; | |
2089 | } | |
2090 | ||
2091 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
2092 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
2093 | se_tmr->call_transport = 1; | |
2094 | attach: | |
2095 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2096 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2097 | spin_unlock_bh(&conn->cmd_lock); |
2098 | ||
2099 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 | 2100 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
e48354ce NB |
2101 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) |
2102 | out_of_order_cmdsn = 1; | |
5a4c8666 | 2103 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2104 | return 0; |
5a4c8666 | 2105 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 | 2106 | return -1; |
e48354ce | 2107 | } |
50e5c87d | 2108 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 2109 | |
5a4c8666 | 2110 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
2111 | return 0; |
2112 | /* | |
2113 | * Found the referenced task, send to transport for processing. | |
2114 | */ | |
2115 | if (se_tmr->call_transport) | |
2116 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
2117 | ||
2118 | /* | |
2119 | * Could not find the referenced LUN, task, or Task Management | |
2120 | * command not authorized or supported. Change state and | |
2121 | * let the tx_thread send the response. | |
2122 | * | |
2123 | * For connection recovery, this is also the default action for | |
2124 | * TMR TASK_REASSIGN. | |
2125 | */ | |
186a9647 NB |
2126 | if (sess_ref) { |
2127 | pr_debug("Handle TMR, using sess_ref=true check\n"); | |
afc16604 | 2128 | target_put_sess_cmd(&cmd->se_cmd); |
186a9647 NB |
2129 | } |
2130 | ||
e48354ce NB |
2131 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); |
2132 | return 0; | |
2133 | } | |
3e1c81a9 | 2134 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
2135 | |
2136 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
64534aa7 NB |
2137 | int |
2138 | iscsit_setup_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2139 | struct iscsi_text *hdr) | |
e48354ce | 2140 | { |
64534aa7 | 2141 | u32 payload_length = ntoh24(hdr->dlength); |
e48354ce | 2142 | |
21f5aa7e | 2143 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 2144 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
2145 | "greater than MaxXmitDataSegmentLength %u.\n", |
2146 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
ba159914 NB |
2147 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2148 | (unsigned char *)hdr); | |
e48354ce NB |
2149 | } |
2150 | ||
122f8afc NB |
2151 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL) || |
2152 | (hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)) { | |
2153 | pr_err("Multi sequence text commands currently not supported\n"); | |
2154 | return iscsit_reject_cmd(cmd, ISCSI_REASON_CMD_NOT_SUPPORTED, | |
2155 | (unsigned char *)hdr); | |
2156 | } | |
2157 | ||
e48354ce NB |
2158 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," |
2159 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
2160 | hdr->exp_statsn, payload_length); | |
2161 | ||
64534aa7 NB |
2162 | cmd->iscsi_opcode = ISCSI_OP_TEXT; |
2163 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
2164 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2165 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2166 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
2167 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); | |
2168 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2169 | cmd->data_direction = DMA_NONE; | |
e4f4e801 | 2170 | cmd->text_in_ptr = NULL; |
64534aa7 NB |
2171 | |
2172 | return 0; | |
2173 | } | |
2174 | EXPORT_SYMBOL(iscsit_setup_text_cmd); | |
2175 | ||
2176 | int | |
2177 | iscsit_process_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2178 | struct iscsi_text *hdr) | |
2179 | { | |
9864ca9d | 2180 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr; |
64534aa7 NB |
2181 | int cmdsn_ret; |
2182 | ||
9864ca9d | 2183 | if (!text_in) { |
e4f4e801 SG |
2184 | cmd->targ_xfer_tag = be32_to_cpu(hdr->ttt); |
2185 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) { | |
2186 | pr_err("Unable to locate text_in buffer for sendtargets" | |
2187 | " discovery\n"); | |
2188 | goto reject; | |
2189 | } | |
2190 | goto empty_sendtargets; | |
9864ca9d NB |
2191 | } |
2192 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
2193 | pr_err("Received Text Data that is not" | |
2194 | " SendTargets, cannot continue.\n"); | |
2195 | goto reject; | |
2196 | } | |
2197 | text_ptr = strchr(text_in, '='); | |
2198 | if (!text_ptr) { | |
2199 | pr_err("No \"=\" separator found in Text Data," | |
2200 | " cannot continue.\n"); | |
2201 | goto reject; | |
2202 | } | |
2203 | if (!strncmp("=All", text_ptr, 4)) { | |
8060b8dd | 2204 | cmd->cmd_flags |= ICF_SENDTARGETS_ALL; |
6665889c NB |
2205 | } else if (!strncmp("=iqn.", text_ptr, 5) || |
2206 | !strncmp("=eui.", text_ptr, 5)) { | |
8060b8dd | 2207 | cmd->cmd_flags |= ICF_SENDTARGETS_SINGLE; |
9864ca9d NB |
2208 | } else { |
2209 | pr_err("Unable to locate valid SendTargets=%s value\n", text_ptr); | |
2210 | goto reject; | |
2211 | } | |
2212 | ||
64534aa7 NB |
2213 | spin_lock_bh(&conn->cmd_lock); |
2214 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); | |
2215 | spin_unlock_bh(&conn->cmd_lock); | |
2216 | ||
e4f4e801 | 2217 | empty_sendtargets: |
64534aa7 NB |
2218 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
2219 | ||
2220 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
561bf158 NB |
2221 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, |
2222 | (unsigned char *)hdr, hdr->cmdsn); | |
64534aa7 | 2223 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
ba159914 NB |
2224 | return -1; |
2225 | ||
64534aa7 NB |
2226 | return 0; |
2227 | } | |
2228 | ||
2229 | return iscsit_execute_cmd(cmd, 0); | |
9864ca9d NB |
2230 | |
2231 | reject: | |
ba159914 NB |
2232 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, |
2233 | (unsigned char *)hdr); | |
64534aa7 NB |
2234 | } |
2235 | EXPORT_SYMBOL(iscsit_process_text_cmd); | |
2236 | ||
2237 | static int | |
2238 | iscsit_handle_text_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2239 | unsigned char *buf) | |
2240 | { | |
2241 | struct iscsi_text *hdr = (struct iscsi_text *)buf; | |
2242 | char *text_in = NULL; | |
2243 | u32 payload_length = ntoh24(hdr->dlength); | |
2244 | int rx_size, rc; | |
2245 | ||
2246 | rc = iscsit_setup_text_cmd(conn, cmd, hdr); | |
2247 | if (rc < 0) | |
561bf158 | 2248 | return 0; |
64534aa7 NB |
2249 | |
2250 | rx_size = payload_length; | |
2251 | if (payload_length) { | |
64534aa7 NB |
2252 | u32 checksum = 0, data_crc = 0; |
2253 | u32 padding = 0, pad_bytes = 0; | |
2254 | int niov = 0, rx_got; | |
2255 | struct kvec iov[3]; | |
2256 | ||
2257 | text_in = kzalloc(payload_length, GFP_KERNEL); | |
e48354ce NB |
2258 | if (!text_in) { |
2259 | pr_err("Unable to allocate memory for" | |
2260 | " incoming text parameters\n"); | |
64534aa7 | 2261 | goto reject; |
e48354ce | 2262 | } |
9864ca9d | 2263 | cmd->text_in_ptr = text_in; |
e48354ce NB |
2264 | |
2265 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
2266 | iov[niov].iov_base = text_in; | |
64534aa7 | 2267 | iov[niov++].iov_len = payload_length; |
e48354ce NB |
2268 | |
2269 | padding = ((-payload_length) & 3); | |
2270 | if (padding != 0) { | |
76f1928e | 2271 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
2272 | iov[niov++].iov_len = padding; |
2273 | rx_size += padding; | |
2274 | pr_debug("Receiving %u additional bytes" | |
2275 | " for padding.\n", padding); | |
2276 | } | |
2277 | if (conn->conn_ops->DataDigest) { | |
2278 | iov[niov].iov_base = &checksum; | |
2279 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2280 | rx_size += ISCSI_CRC_LEN; | |
2281 | } | |
2282 | ||
2283 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
64534aa7 NB |
2284 | if (rx_got != rx_size) |
2285 | goto reject; | |
e48354ce NB |
2286 | |
2287 | if (conn->conn_ops->DataDigest) { | |
69110e3c | 2288 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
64534aa7 | 2289 | text_in, payload_length, |
76f1928e | 2290 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
2291 | (u8 *)&data_crc); |
2292 | ||
2293 | if (checksum != data_crc) { | |
2294 | pr_err("Text data CRC32C DataDigest" | |
2295 | " 0x%08x does not match computed" | |
2296 | " 0x%08x\n", checksum, data_crc); | |
2297 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2298 | pr_err("Unable to recover from" | |
2299 | " Text Data digest failure while in" | |
2300 | " ERL=0.\n"); | |
64534aa7 | 2301 | goto reject; |
e48354ce NB |
2302 | } else { |
2303 | /* | |
2304 | * Silently drop this PDU and let the | |
2305 | * initiator plug the CmdSN gap. | |
2306 | */ | |
2307 | pr_debug("Dropping Text" | |
2308 | " Command CmdSN: 0x%08x due to" | |
2309 | " DataCRC error.\n", hdr->cmdsn); | |
2310 | kfree(text_in); | |
2311 | return 0; | |
2312 | } | |
2313 | } else { | |
2314 | pr_debug("Got CRC32C DataDigest" | |
2315 | " 0x%08x for %u bytes of text data.\n", | |
64534aa7 | 2316 | checksum, payload_length); |
e48354ce NB |
2317 | } |
2318 | } | |
64534aa7 | 2319 | text_in[payload_length - 1] = '\0'; |
e48354ce | 2320 | pr_debug("Successfully read %d bytes of text" |
64534aa7 | 2321 | " data.\n", payload_length); |
e48354ce NB |
2322 | } |
2323 | ||
64534aa7 | 2324 | return iscsit_process_text_cmd(conn, cmd, hdr); |
e48354ce | 2325 | |
64534aa7 | 2326 | reject: |
9864ca9d NB |
2327 | kfree(cmd->text_in_ptr); |
2328 | cmd->text_in_ptr = NULL; | |
ba159914 | 2329 | return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf); |
e48354ce NB |
2330 | } |
2331 | ||
2332 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2333 | { | |
2334 | struct iscsi_conn *conn_p; | |
2335 | struct iscsi_session *sess = conn->sess; | |
2336 | ||
2337 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2338 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2339 | ||
2340 | atomic_set(&sess->session_logout, 1); | |
2341 | atomic_set(&conn->conn_logout_remove, 1); | |
2342 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2343 | ||
2344 | iscsit_inc_conn_usage_count(conn); | |
2345 | iscsit_inc_session_usage_count(sess); | |
2346 | ||
2347 | spin_lock_bh(&sess->conn_lock); | |
2348 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2349 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2350 | continue; | |
2351 | ||
2352 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2353 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2354 | } | |
2355 | spin_unlock_bh(&sess->conn_lock); | |
2356 | ||
2357 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2358 | ||
2359 | return 0; | |
2360 | } | |
2361 | ||
2362 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2363 | { | |
2364 | struct iscsi_conn *l_conn; | |
2365 | struct iscsi_session *sess = conn->sess; | |
2366 | ||
2367 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2368 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2369 | ||
2370 | /* | |
2371 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2372 | * can arrive on a connection with a differing CID. | |
2373 | */ | |
2374 | if (conn->cid == cmd->logout_cid) { | |
2375 | spin_lock_bh(&conn->state_lock); | |
2376 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2377 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2378 | ||
2379 | atomic_set(&conn->conn_logout_remove, 1); | |
2380 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2381 | iscsit_inc_conn_usage_count(conn); | |
2382 | ||
2383 | spin_unlock_bh(&conn->state_lock); | |
2384 | } else { | |
2385 | /* | |
2386 | * Handle all different cid CLOSECONNECTION requests in | |
2387 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2388 | * time for any non immediate command's CmdSN to be | |
2389 | * acknowledged on the connection in question. | |
2390 | * | |
2391 | * Here we simply make sure the CID is still around. | |
2392 | */ | |
2393 | l_conn = iscsit_get_conn_from_cid(sess, | |
2394 | cmd->logout_cid); | |
2395 | if (!l_conn) { | |
2396 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2397 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2398 | cmd->i_state); | |
2399 | return 0; | |
2400 | } | |
2401 | ||
2402 | iscsit_dec_conn_usage_count(l_conn); | |
2403 | } | |
2404 | ||
2405 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2406 | ||
2407 | return 0; | |
2408 | } | |
2409 | ||
2410 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2411 | { | |
2412 | struct iscsi_session *sess = conn->sess; | |
2413 | ||
2414 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2415 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2416 | ||
2417 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2418 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2419 | " while ERL!=2.\n"); | |
2420 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2421 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2422 | return 0; | |
2423 | } | |
2424 | ||
2425 | if (conn->cid == cmd->logout_cid) { | |
2426 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2427 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2428 | cmd->logout_cid, conn->cid); | |
2429 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2430 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2431 | return 0; | |
2432 | } | |
2433 | ||
2434 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2435 | ||
2436 | return 0; | |
2437 | } | |
2438 | ||
3e1c81a9 NB |
2439 | int |
2440 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2441 | unsigned char *buf) | |
e48354ce NB |
2442 | { |
2443 | int cmdsn_ret, logout_remove = 0; | |
2444 | u8 reason_code = 0; | |
e48354ce NB |
2445 | struct iscsi_logout *hdr; |
2446 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2447 | ||
2448 | hdr = (struct iscsi_logout *) buf; | |
2449 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2450 | |
2451 | if (tiqn) { | |
2452 | spin_lock(&tiqn->logout_stats.lock); | |
2453 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2454 | tiqn->logout_stats.normal_logouts++; | |
2455 | else | |
2456 | tiqn->logout_stats.abnormal_logouts++; | |
2457 | spin_unlock(&tiqn->logout_stats.lock); | |
2458 | } | |
2459 | ||
2460 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2461 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2462 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2463 | hdr->cid, conn->cid); | |
2464 | ||
2465 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2466 | pr_err("Received logout request on connection that" | |
2467 | " is not in logged in state, ignoring request.\n"); | |
aafc9d15 | 2468 | iscsit_free_cmd(cmd, false); |
e48354ce NB |
2469 | return 0; |
2470 | } | |
2471 | ||
e48354ce NB |
2472 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2473 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2474 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2475 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2476 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2477 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2478 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2479 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2480 | cmd->logout_reason = reason_code; |
2481 | cmd->data_direction = DMA_NONE; | |
2482 | ||
2483 | /* | |
2484 | * We need to sleep in these cases (by returning 1) until the Logout | |
2485 | * Response gets sent in the tx thread. | |
2486 | */ | |
2487 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2488 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2489 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2490 | logout_remove = 1; |
2491 | ||
2492 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2493 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2494 | spin_unlock_bh(&conn->cmd_lock); |
2495 | ||
2496 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2497 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2498 | |
2499 | /* | |
2500 | * Immediate commands are executed, well, immediately. | |
2501 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2502 | */ | |
c6037cc5 | 2503 | if (cmd->immediate_cmd) { |
e48354ce NB |
2504 | int ret = iscsit_execute_cmd(cmd, 0); |
2505 | ||
2506 | if (ret < 0) | |
2507 | return ret; | |
2508 | } else { | |
561bf158 | 2509 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); |
ba159914 | 2510 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 2511 | logout_remove = 0; |
ba159914 NB |
2512 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
2513 | return -1; | |
e48354ce NB |
2514 | } |
2515 | ||
2516 | return logout_remove; | |
2517 | } | |
3e1c81a9 | 2518 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce | 2519 | |
d2faaefb | 2520 | int iscsit_handle_snack( |
e48354ce NB |
2521 | struct iscsi_conn *conn, |
2522 | unsigned char *buf) | |
2523 | { | |
e48354ce NB |
2524 | struct iscsi_snack *hdr; |
2525 | ||
2526 | hdr = (struct iscsi_snack *) buf; | |
2527 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2528 | |
2529 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2530 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2531 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2532 | hdr->begrun, hdr->runlength, conn->cid); | |
2533 | ||
2534 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2535 | pr_err("Initiator sent SNACK request while in" | |
2536 | " ErrorRecoveryLevel=0.\n"); | |
ba159914 NB |
2537 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2538 | buf); | |
e48354ce NB |
2539 | } |
2540 | /* | |
2541 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2542 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2543 | */ | |
2544 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2545 | case 0: | |
2546 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2547 | hdr->itt, |
2548 | be32_to_cpu(hdr->ttt), | |
2549 | be32_to_cpu(hdr->begrun), | |
2550 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2551 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2552 | return iscsit_handle_status_snack(conn, hdr->itt, |
2553 | be32_to_cpu(hdr->ttt), | |
2554 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2555 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2556 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2557 | be32_to_cpu(hdr->begrun), | |
2558 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2559 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2560 | /* FIXME: Support R-Data SNACK */ | |
2561 | pr_err("R-Data SNACK Not Supported.\n"); | |
ba159914 NB |
2562 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2563 | buf); | |
e48354ce NB |
2564 | default: |
2565 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2566 | " error.\n", hdr->flags & 0x0f); | |
ba159914 NB |
2567 | return iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
2568 | buf); | |
e48354ce NB |
2569 | } |
2570 | ||
2571 | return 0; | |
2572 | } | |
d2faaefb | 2573 | EXPORT_SYMBOL(iscsit_handle_snack); |
e48354ce NB |
2574 | |
2575 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2576 | { | |
2577 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2578 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2579 | wait_for_completion_interruptible_timeout( | |
2580 | &conn->rx_half_close_comp, | |
2581 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2582 | } | |
2583 | } | |
2584 | ||
2585 | static int iscsit_handle_immediate_data( | |
2586 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2587 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2588 | u32 length) |
2589 | { | |
2590 | int iov_ret, rx_got = 0, rx_size = 0; | |
2591 | u32 checksum, iov_count = 0, padding = 0; | |
2592 | struct iscsi_conn *conn = cmd->conn; | |
2593 | struct kvec *iov; | |
2594 | ||
2595 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2596 | if (iov_ret < 0) | |
2597 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2598 | ||
2599 | rx_size = length; | |
2600 | iov_count = iov_ret; | |
2601 | iov = &cmd->iov_data[0]; | |
2602 | ||
2603 | padding = ((-length) & 3); | |
2604 | if (padding != 0) { | |
2605 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2606 | iov[iov_count++].iov_len = padding; | |
2607 | rx_size += padding; | |
2608 | } | |
2609 | ||
2610 | if (conn->conn_ops->DataDigest) { | |
2611 | iov[iov_count].iov_base = &checksum; | |
2612 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2613 | rx_size += ISCSI_CRC_LEN; | |
2614 | } | |
2615 | ||
2616 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2617 | ||
2618 | iscsit_unmap_iovec(cmd); | |
2619 | ||
2620 | if (rx_got != rx_size) { | |
2621 | iscsit_rx_thread_wait_for_tcp(conn); | |
2622 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2623 | } | |
2624 | ||
2625 | if (conn->conn_ops->DataDigest) { | |
2626 | u32 data_crc; | |
2627 | ||
69110e3c | 2628 | data_crc = iscsit_do_crypto_hash_sg(conn->conn_rx_hash, cmd, |
e48354ce NB |
2629 | cmd->write_data_done, length, padding, |
2630 | cmd->pad_bytes); | |
2631 | ||
2632 | if (checksum != data_crc) { | |
2633 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2634 | " does not match computed 0x%08x\n", checksum, | |
2635 | data_crc); | |
2636 | ||
2637 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2638 | pr_err("Unable to recover from" | |
2639 | " Immediate Data digest failure while" | |
2640 | " in ERL=0.\n"); | |
ba159914 | 2641 | iscsit_reject_cmd(cmd, |
e48354ce | 2642 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2643 | (unsigned char *)hdr); |
e48354ce NB |
2644 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2645 | } else { | |
ba159914 | 2646 | iscsit_reject_cmd(cmd, |
e48354ce | 2647 | ISCSI_REASON_DATA_DIGEST_ERROR, |
ba159914 | 2648 | (unsigned char *)hdr); |
e48354ce NB |
2649 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2650 | } | |
2651 | } else { | |
2652 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2653 | " %u bytes of Immediate Data\n", checksum, | |
2654 | length); | |
2655 | } | |
2656 | } | |
2657 | ||
2658 | cmd->write_data_done += length; | |
2659 | ||
ebf1d95c | 2660 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2661 | spin_lock_bh(&cmd->istate_lock); |
2662 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2663 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2664 | spin_unlock_bh(&cmd->istate_lock); | |
2665 | } | |
2666 | ||
2667 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2668 | } | |
2669 | ||
2670 | /* | |
2671 | * Called with sess->conn_lock held. | |
2672 | */ | |
2673 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2674 | with active network interface */ | |
2675 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2676 | { | |
2677 | struct iscsi_cmd *cmd; | |
2678 | struct iscsi_conn *conn_p; | |
d444edc6 | 2679 | bool found = false; |
e48354ce NB |
2680 | |
2681 | /* | |
2682 | * Only send a Asynchronous Message on connections whos network | |
2683 | * interface is still functional. | |
2684 | */ | |
2685 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2686 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2687 | iscsit_inc_conn_usage_count(conn_p); | |
d444edc6 | 2688 | found = true; |
e48354ce NB |
2689 | break; |
2690 | } | |
2691 | } | |
2692 | ||
d444edc6 | 2693 | if (!found) |
e48354ce NB |
2694 | return; |
2695 | ||
676687c6 | 2696 | cmd = iscsit_allocate_cmd(conn_p, TASK_RUNNING); |
e48354ce NB |
2697 | if (!cmd) { |
2698 | iscsit_dec_conn_usage_count(conn_p); | |
2699 | return; | |
2700 | } | |
2701 | ||
2702 | cmd->logout_cid = conn->cid; | |
2703 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2704 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2705 | ||
2706 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2707 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2708 | spin_unlock_bh(&conn_p->cmd_lock); |
2709 | ||
2710 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2711 | iscsit_dec_conn_usage_count(conn_p); | |
2712 | } | |
2713 | ||
2714 | static int iscsit_send_conn_drop_async_message( | |
2715 | struct iscsi_cmd *cmd, | |
2716 | struct iscsi_conn *conn) | |
2717 | { | |
2718 | struct iscsi_async *hdr; | |
2719 | ||
e48354ce NB |
2720 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; |
2721 | ||
2722 | hdr = (struct iscsi_async *) cmd->pdu; | |
2723 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2724 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2725 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2726 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2727 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2728 | cmd->stat_sn = conn->stat_sn++; | |
2729 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2730 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2731 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce NB |
2732 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; |
2733 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2734 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2735 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2736 | ||
e48354ce NB |
2737 | pr_debug("Sending Connection Dropped Async Message StatSN:" |
2738 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2739 | cmd->logout_cid, conn->cid); | |
2854bb23 VP |
2740 | |
2741 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); | |
e48354ce NB |
2742 | } |
2743 | ||
6f3c0e69 AG |
2744 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2745 | { | |
2746 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2747 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2748 | wait_for_completion_interruptible_timeout( | |
2749 | &conn->tx_half_close_comp, | |
2750 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2751 | } | |
2752 | } | |
2753 | ||
d2faaefb | 2754 | void |
2ec5a8c1 NB |
2755 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
2756 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2757 | bool set_statsn) | |
e48354ce | 2758 | { |
2ec5a8c1 NB |
2759 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2760 | hdr->flags = datain->flags; | |
2761 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2762 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2763 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2764 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2765 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2766 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2767 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2768 | } | |
2769 | } | |
2770 | hton24(hdr->dlength, datain->length); | |
2771 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2772 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2773 | (struct scsi_lun *)&hdr->lun); | |
2774 | else | |
2775 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2776 | ||
2777 | hdr->itt = cmd->init_task_tag; | |
2778 | ||
2779 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2780 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2781 | else | |
2782 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2783 | if (set_statsn) | |
2784 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2785 | else | |
2786 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2787 | ||
2788 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2789 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
2790 | hdr->datasn = cpu_to_be32(datain->data_sn); |
2791 | hdr->offset = cpu_to_be32(datain->offset); | |
2792 | ||
2793 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2794 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2795 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2796 | ntohl(hdr->offset), datain->length, conn->cid); | |
2797 | } | |
d2faaefb | 2798 | EXPORT_SYMBOL(iscsit_build_datain_pdu); |
2ec5a8c1 NB |
2799 | |
2800 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2801 | { | |
2802 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2803 | struct iscsi_datain datain; |
2804 | struct iscsi_datain_req *dr; | |
2854bb23 | 2805 | int eodr = 0, ret; |
2ec5a8c1 | 2806 | bool set_statsn = false; |
e48354ce NB |
2807 | |
2808 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2809 | dr = iscsit_get_datain_values(cmd, &datain); | |
2810 | if (!dr) { | |
2811 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2812 | cmd->init_task_tag); | |
2813 | return -1; | |
2814 | } | |
e48354ce NB |
2815 | /* |
2816 | * Be paranoid and double check the logic for now. | |
2817 | */ | |
ebf1d95c | 2818 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2819 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2820 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2821 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2822 | cmd->se_cmd.data_length); |
e48354ce NB |
2823 | return -1; |
2824 | } | |
2825 | ||
04f3b31b | 2826 | atomic_long_add(datain.length, &conn->sess->tx_data_octets); |
e48354ce NB |
2827 | /* |
2828 | * Special case for successfully execution w/ both DATAIN | |
2829 | * and Sense Data. | |
2830 | */ | |
2831 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2832 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2833 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2834 | else { | |
2835 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2836 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2837 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2838 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2839 | set_statsn = true; |
e48354ce | 2840 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2841 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2842 | set_statsn = true; | |
e48354ce NB |
2843 | } |
2844 | ||
2ec5a8c1 | 2845 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce | 2846 | |
2854bb23 VP |
2847 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, dr, &datain, 0); |
2848 | if (ret < 0) | |
6f3c0e69 | 2849 | return ret; |
6f3c0e69 | 2850 | |
e48354ce | 2851 | if (dr->dr_complete) { |
6f3c0e69 | 2852 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2853 | 2 : 1; |
2854 | iscsit_free_datain_req(cmd, dr); | |
2855 | } | |
2856 | ||
6f3c0e69 | 2857 | return eodr; |
e48354ce NB |
2858 | } |
2859 | ||
2ec5a8c1 NB |
2860 | int |
2861 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2862 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2863 | { |
e48354ce NB |
2864 | struct iscsi_conn *logout_conn = NULL; |
2865 | struct iscsi_conn_recovery *cr = NULL; | |
2866 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2867 | /* |
2868 | * The actual shutting down of Sessions and/or Connections | |
2869 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2870 | * is done in scsi_logout_post_handler(). | |
2871 | */ | |
2872 | switch (cmd->logout_reason) { | |
2873 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2874 | pr_debug("iSCSI session logout successful, setting" | |
2875 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2876 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2877 | break; | |
2878 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2879 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2880 | break; | |
2881 | /* | |
2882 | * For CLOSECONNECTION logout requests carrying | |
2883 | * a matching logout CID -> local CID, the reference | |
2884 | * for the local CID will have been incremented in | |
2885 | * iscsi_logout_closeconnection(). | |
2886 | * | |
2887 | * For CLOSECONNECTION logout requests carrying | |
2888 | * a different CID than the connection it arrived | |
2889 | * on, the connection responding to cmd->logout_cid | |
2890 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2891 | */ | |
2892 | ||
2893 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2894 | " successful.\n", cmd->logout_cid, conn->cid); | |
2895 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2896 | break; | |
2897 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2898 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2899 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2900 | break; | |
2901 | /* | |
2902 | * If the connection is still active from our point of view | |
2903 | * force connection recovery to occur. | |
2904 | */ | |
2905 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2906 | cmd->logout_cid); | |
ee1b1b9c | 2907 | if (logout_conn) { |
e48354ce NB |
2908 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2909 | iscsit_dec_conn_usage_count(logout_conn); | |
2910 | } | |
2911 | ||
2912 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2913 | conn->sess, cmd->logout_cid); | |
2914 | if (!cr) { | |
2915 | pr_err("Unable to locate CID: %hu for" | |
2916 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2917 | cmd->logout_cid); | |
2918 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2919 | break; | |
2920 | } | |
2921 | ||
2922 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2923 | ||
2924 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2925 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2926 | cmd->logout_cid, conn->cid); | |
2927 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2928 | break; | |
2929 | default: | |
2930 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2931 | cmd->logout_reason); | |
2932 | return -1; | |
2933 | } | |
2934 | ||
e48354ce NB |
2935 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2936 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2937 | hdr->response = cmd->logout_response; | |
66c7db68 | 2938 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2939 | cmd->stat_sn = conn->stat_sn++; |
2940 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2941 | ||
2942 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2943 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2944 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 2945 | |
2ec5a8c1 NB |
2946 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2947 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2948 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2949 | cmd->logout_cid, conn->cid); | |
2950 | ||
2951 | return 0; | |
2952 | } | |
2953 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2954 | ||
2955 | static int | |
2956 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2957 | { | |
2854bb23 | 2958 | int rc; |
2ec5a8c1 NB |
2959 | |
2960 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2961 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2962 | if (rc < 0) | |
2963 | return rc; | |
2964 | ||
2854bb23 | 2965 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
e48354ce NB |
2966 | } |
2967 | ||
2ec5a8c1 NB |
2968 | void |
2969 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2970 | struct iscsi_nopin *hdr, bool nopout_response) | |
2971 | { | |
2972 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2973 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2974 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2975 | if (nopout_response) | |
2976 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2977 | hdr->itt = cmd->init_task_tag; | |
2978 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2979 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2980 | conn->stat_sn; | |
2981 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2982 | ||
2983 | if (nopout_response) | |
2984 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2985 | ||
2986 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 2987 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
2988 | |
2989 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2990 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
3fc6a642 | 2991 | "Solicited" : "Unsolicited", cmd->init_task_tag, |
2ec5a8c1 NB |
2992 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); |
2993 | } | |
2994 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2995 | ||
e48354ce NB |
2996 | /* |
2997 | * Unsolicited NOPIN, either requesting a response or not. | |
2998 | */ | |
2999 | static int iscsit_send_unsolicited_nopin( | |
3000 | struct iscsi_cmd *cmd, | |
3001 | struct iscsi_conn *conn, | |
3002 | int want_response) | |
3003 | { | |
2ec5a8c1 | 3004 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2854bb23 | 3005 | int ret; |
e48354ce | 3006 | |
2ec5a8c1 | 3007 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce | 3008 | |
e48354ce NB |
3009 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" |
3010 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
3011 | ||
2854bb23 VP |
3012 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
3013 | if (ret < 0) | |
6f3c0e69 | 3014 | return ret; |
6f3c0e69 AG |
3015 | |
3016 | spin_lock_bh(&cmd->istate_lock); | |
3017 | cmd->i_state = want_response ? | |
3018 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
3019 | spin_unlock_bh(&cmd->istate_lock); | |
3020 | ||
e48354ce NB |
3021 | return 0; |
3022 | } | |
3023 | ||
2ec5a8c1 NB |
3024 | static int |
3025 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 3026 | { |
2ec5a8c1 | 3027 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 3028 | |
2ec5a8c1 | 3029 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 3030 | |
e48354ce NB |
3031 | /* |
3032 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
3033 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
3034 | */ | |
2854bb23 | 3035 | pr_debug("Echoing back %u bytes of ping data.\n", cmd->buf_ptr_size); |
e48354ce | 3036 | |
2854bb23 VP |
3037 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3038 | cmd->buf_ptr, | |
3039 | cmd->buf_ptr_size); | |
e48354ce NB |
3040 | } |
3041 | ||
6f3c0e69 | 3042 | static int iscsit_send_r2t( |
e48354ce NB |
3043 | struct iscsi_cmd *cmd, |
3044 | struct iscsi_conn *conn) | |
3045 | { | |
e48354ce NB |
3046 | struct iscsi_r2t *r2t; |
3047 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 3048 | int ret; |
e48354ce NB |
3049 | |
3050 | r2t = iscsit_get_r2t_from_list(cmd); | |
3051 | if (!r2t) | |
3052 | return -1; | |
3053 | ||
3054 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3055 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3056 | hdr->opcode = ISCSI_OP_R2T; | |
3057 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3058 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3059 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3060 | hdr->itt = cmd->init_task_tag; |
8567270d VP |
3061 | if (conn->conn_transport->iscsit_get_r2t_ttt) |
3062 | conn->conn_transport->iscsit_get_r2t_ttt(conn, cmd, r2t); | |
3063 | else | |
3064 | r2t->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
e48354ce NB |
3065 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); |
3066 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3067 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3068 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce NB |
3069 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); |
3070 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3071 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3072 | ||
e48354ce NB |
3073 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" |
3074 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3075 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3076 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3077 | r2t->offset, r2t->xfer_len, conn->cid); | |
3078 | ||
e48354ce NB |
3079 | spin_lock_bh(&cmd->r2t_lock); |
3080 | r2t->sent_r2t = 1; | |
3081 | spin_unlock_bh(&cmd->r2t_lock); | |
3082 | ||
2854bb23 | 3083 | ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
6f3c0e69 | 3084 | if (ret < 0) { |
6f3c0e69 AG |
3085 | return ret; |
3086 | } | |
3087 | ||
3088 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3089 | iscsit_start_dataout_timer(cmd, conn); | |
3090 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3091 | ||
e48354ce NB |
3092 | return 0; |
3093 | } | |
3094 | ||
3095 | /* | |
8b1e1244 AG |
3096 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3097 | * connection recovery. | |
e48354ce NB |
3098 | */ |
3099 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3100 | struct iscsi_conn *conn, |
3e1c81a9 | 3101 | struct iscsi_cmd *cmd, |
8b1e1244 | 3102 | bool recovery) |
e48354ce NB |
3103 | { |
3104 | int first_r2t = 1; | |
3105 | u32 offset = 0, xfer_len = 0; | |
3106 | ||
3107 | spin_lock_bh(&cmd->r2t_lock); | |
3108 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3109 | spin_unlock_bh(&cmd->r2t_lock); | |
3110 | return 0; | |
3111 | } | |
3112 | ||
8b1e1244 AG |
3113 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3114 | !recovery) | |
c6037cc5 | 3115 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3116 | |
3117 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3118 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3119 | offset = cmd->r2t_offset; | |
3120 | ||
8b1e1244 AG |
3121 | if (first_r2t && recovery) { |
3122 | int new_data_end = offset + | |
3123 | conn->sess->sess_ops->MaxBurstLength - | |
3124 | cmd->next_burst_len; | |
3125 | ||
ebf1d95c AG |
3126 | if (new_data_end > cmd->se_cmd.data_length) |
3127 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3128 | else |
3129 | xfer_len = | |
3130 | conn->sess->sess_ops->MaxBurstLength - | |
3131 | cmd->next_burst_len; | |
e48354ce | 3132 | } else { |
8b1e1244 AG |
3133 | int new_data_end = offset + |
3134 | conn->sess->sess_ops->MaxBurstLength; | |
3135 | ||
ebf1d95c AG |
3136 | if (new_data_end > cmd->se_cmd.data_length) |
3137 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3138 | else |
3139 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3140 | } |
3141 | cmd->r2t_offset += xfer_len; | |
3142 | ||
ebf1d95c | 3143 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3144 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3145 | } else { | |
3146 | struct iscsi_seq *seq; | |
3147 | ||
3148 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3149 | if (!seq) { | |
3150 | spin_unlock_bh(&cmd->r2t_lock); | |
3151 | return -1; | |
3152 | } | |
3153 | ||
3154 | offset = seq->offset; | |
3155 | xfer_len = seq->xfer_len; | |
3156 | ||
3157 | if (cmd->seq_send_order == cmd->seq_count) | |
3158 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3159 | } | |
3160 | cmd->outstanding_r2ts++; | |
3161 | first_r2t = 0; | |
3162 | ||
3163 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3164 | spin_unlock_bh(&cmd->r2t_lock); | |
3165 | return -1; | |
3166 | } | |
3167 | ||
3168 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3169 | break; | |
3170 | } | |
3171 | spin_unlock_bh(&cmd->r2t_lock); | |
3172 | ||
3173 | return 0; | |
3174 | } | |
d2faaefb | 3175 | EXPORT_SYMBOL(iscsit_build_r2ts_for_cmd); |
e48354ce | 3176 | |
2ec5a8c1 NB |
3177 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3178 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3179 | { |
2ec5a8c1 | 3180 | if (inc_stat_sn) |
e48354ce NB |
3181 | cmd->stat_sn = conn->stat_sn++; |
3182 | ||
04f3b31b | 3183 | atomic_long_inc(&conn->sess->rsp_pdus); |
e48354ce | 3184 | |
e48354ce NB |
3185 | memset(hdr, 0, ISCSI_HDR_LEN); |
3186 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3187 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3188 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3189 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3190 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3191 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3192 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3193 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3194 | } |
3195 | hdr->response = cmd->iscsi_response; | |
3196 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3197 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3198 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3199 | ||
3200 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3201 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3202 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3203 | |
2ec5a8c1 NB |
3204 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3205 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3206 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3207 | cmd->se_cmd.scsi_status, conn->cid); | |
3208 | } | |
3209 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3210 | ||
3211 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3212 | { | |
3213 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
2ec5a8c1 | 3214 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); |
2854bb23 VP |
3215 | void *data_buf = NULL; |
3216 | u32 padding = 0, data_buf_len = 0; | |
2ec5a8c1 NB |
3217 | |
3218 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3219 | ||
e48354ce NB |
3220 | /* |
3221 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3222 | */ | |
3223 | if (cmd->se_cmd.sense_buffer && | |
3224 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3225 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3226 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3227 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3228 | ||
e48354ce | 3229 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3230 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
2854bb23 VP |
3231 | data_buf = cmd->sense_buffer; |
3232 | data_buf_len = cmd->se_cmd.scsi_sense_length + padding; | |
e48354ce NB |
3233 | |
3234 | if (padding) { | |
9c58b7dd | 3235 | memset(cmd->sense_buffer + |
e48354ce | 3236 | cmd->se_cmd.scsi_sense_length, 0, padding); |
e48354ce NB |
3237 | pr_debug("Adding %u bytes of padding to" |
3238 | " SENSE.\n", padding); | |
3239 | } | |
3240 | ||
e48354ce NB |
3241 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" |
3242 | " Response PDU\n", | |
3243 | cmd->se_cmd.scsi_sense_length); | |
3244 | } | |
3245 | ||
2854bb23 VP |
3246 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, data_buf, |
3247 | data_buf_len); | |
e48354ce NB |
3248 | } |
3249 | ||
3250 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3251 | { | |
3252 | switch (se_tmr->response) { | |
3253 | case TMR_FUNCTION_COMPLETE: | |
3254 | return ISCSI_TMF_RSP_COMPLETE; | |
3255 | case TMR_TASK_DOES_NOT_EXIST: | |
3256 | return ISCSI_TMF_RSP_NO_TASK; | |
3257 | case TMR_LUN_DOES_NOT_EXIST: | |
3258 | return ISCSI_TMF_RSP_NO_LUN; | |
3259 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3260 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
e48354ce NB |
3261 | case TMR_FUNCTION_REJECTED: |
3262 | default: | |
3263 | return ISCSI_TMF_RSP_REJECTED; | |
3264 | } | |
3265 | } | |
3266 | ||
2ec5a8c1 NB |
3267 | void |
3268 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3269 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3270 | { |
3271 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3272 | |
e48354ce | 3273 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3274 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3275 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3276 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3277 | cmd->stat_sn = conn->stat_sn++; |
3278 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3279 | ||
3280 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3281 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3282 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3283 | |
2ec5a8c1 NB |
3284 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3285 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3286 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3287 | } | |
3288 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3289 | ||
3290 | static int | |
3291 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3292 | { | |
3293 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
2ec5a8c1 NB |
3294 | |
3295 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3296 | ||
2854bb23 | 3297 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0); |
e48354ce NB |
3298 | } |
3299 | ||
2f9bc894 NB |
3300 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3301 | { | |
3302 | bool ret = false; | |
3303 | ||
3304 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3305 | const struct sockaddr_in6 sin6 = { | |
3306 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3307 | struct sockaddr_in6 *sock_in6 = | |
3308 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3309 | ||
3310 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3311 | sin6.sin6_addr.s6_addr, 16)) | |
3312 | ret = true; | |
3313 | } else { | |
3314 | struct sockaddr_in * sock_in = | |
3315 | (struct sockaddr_in *)&np->np_sockaddr; | |
3316 | ||
cea0b4ce | 3317 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3318 | ret = true; |
3319 | } | |
3320 | ||
3321 | return ret; | |
3322 | } | |
3323 | ||
8b1e1244 AG |
3324 | #define SENDTARGETS_BUF_LIMIT 32768U |
3325 | ||
22c7aaa5 SG |
3326 | static int |
3327 | iscsit_build_sendtargets_response(struct iscsi_cmd *cmd, | |
e4f4e801 SG |
3328 | enum iscsit_transport_type network_transport, |
3329 | int skip_bytes, bool *completed) | |
e48354ce NB |
3330 | { |
3331 | char *payload = NULL; | |
3332 | struct iscsi_conn *conn = cmd->conn; | |
3333 | struct iscsi_portal_group *tpg; | |
3334 | struct iscsi_tiqn *tiqn; | |
3335 | struct iscsi_tpg_np *tpg_np; | |
3336 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
2dd1d53f | 3337 | int target_name_printed; |
8b1e1244 | 3338 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
6665889c | 3339 | unsigned char *text_in = cmd->text_in_ptr, *text_ptr = NULL; |
a6415cdd | 3340 | bool active; |
e48354ce | 3341 | |
be7dcfb6 | 3342 | buffer_len = min(conn->conn_ops->MaxRecvDataSegmentLength, |
8b1e1244 | 3343 | SENDTARGETS_BUF_LIMIT); |
e48354ce NB |
3344 | |
3345 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3346 | if (!payload) { | |
3347 | pr_err("Unable to allocate memory for sendtargets" | |
3348 | " response.\n"); | |
3349 | return -ENOMEM; | |
3350 | } | |
6665889c | 3351 | /* |
8060b8dd | 3352 | * Locate pointer to iqn./eui. string for ICF_SENDTARGETS_SINGLE |
6665889c NB |
3353 | * explicit case.. |
3354 | */ | |
8060b8dd | 3355 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) { |
6665889c NB |
3356 | text_ptr = strchr(text_in, '='); |
3357 | if (!text_ptr) { | |
3358 | pr_err("Unable to locate '=' string in text_in:" | |
3359 | " %s\n", text_in); | |
4f45d320 | 3360 | kfree(payload); |
6665889c NB |
3361 | return -EINVAL; |
3362 | } | |
3363 | /* | |
3364 | * Skip over '=' character.. | |
3365 | */ | |
3366 | text_ptr += 1; | |
3367 | } | |
e48354ce NB |
3368 | |
3369 | spin_lock(&tiqn_lock); | |
3370 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
8060b8dd | 3371 | if ((cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) && |
6665889c NB |
3372 | strcmp(tiqn->tiqn, text_ptr)) { |
3373 | continue; | |
3374 | } | |
3375 | ||
2dd1d53f | 3376 | target_name_printed = 0; |
e48354ce NB |
3377 | |
3378 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3379 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3380 | ||
2dd1d53f TG |
3381 | /* If demo_mode_discovery=0 and generate_node_acls=0 |
3382 | * (demo mode dislabed) do not return | |
3383 | * TargetName+TargetAddress unless a NodeACL exists. | |
3384 | */ | |
3385 | ||
3386 | if ((tpg->tpg_attrib.generate_node_acls == 0) && | |
3387 | (tpg->tpg_attrib.demo_mode_discovery == 0) && | |
21aaa23b | 3388 | (!target_tpg_has_node_acl(&tpg->tpg_se_tpg, |
2dd1d53f TG |
3389 | cmd->conn->sess->sess_ops->InitiatorName))) { |
3390 | continue; | |
3391 | } | |
3392 | ||
e48354ce | 3393 | spin_lock(&tpg->tpg_state_lock); |
a6415cdd | 3394 | active = (tpg->tpg_state == TPG_STATE_ACTIVE); |
e48354ce NB |
3395 | spin_unlock(&tpg->tpg_state_lock); |
3396 | ||
a6415cdd DD |
3397 | if (!active && tpg->tpg_attrib.tpg_enabled_sendtargets) |
3398 | continue; | |
3399 | ||
e48354ce NB |
3400 | spin_lock(&tpg->tpg_np_lock); |
3401 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3402 | tpg_np_list) { | |
2f9bc894 NB |
3403 | struct iscsi_np *np = tpg_np->tpg_np; |
3404 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
13a3cf08 | 3405 | struct sockaddr_storage *sockaddr; |
2f9bc894 | 3406 | |
22c7aaa5 SG |
3407 | if (np->np_network_transport != network_transport) |
3408 | continue; | |
3409 | ||
2dd1d53f TG |
3410 | if (!target_name_printed) { |
3411 | len = sprintf(buf, "TargetName=%s", | |
3412 | tiqn->tiqn); | |
3413 | len += 1; | |
3414 | ||
3415 | if ((len + payload_len) > buffer_len) { | |
3416 | spin_unlock(&tpg->tpg_np_lock); | |
3417 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3418 | end_of_buf = 1; | |
3419 | goto eob; | |
3420 | } | |
e4f4e801 SG |
3421 | |
3422 | if (skip_bytes && len <= skip_bytes) { | |
3423 | skip_bytes -= len; | |
3424 | } else { | |
3425 | memcpy(payload + payload_len, buf, len); | |
3426 | payload_len += len; | |
3427 | target_name_printed = 1; | |
3428 | if (len > skip_bytes) | |
3429 | skip_bytes = 0; | |
3430 | } | |
2dd1d53f TG |
3431 | } |
3432 | ||
69d75574 AG |
3433 | if (inaddr_any) |
3434 | sockaddr = &conn->local_sockaddr; | |
1997e625 | 3435 | else |
69d75574 | 3436 | sockaddr = &np->np_sockaddr; |
1997e625 | 3437 | |
69d75574 AG |
3438 | len = sprintf(buf, "TargetAddress=" |
3439 | "%pISpc,%hu", | |
3440 | sockaddr, | |
3441 | tpg->tpgt); | |
e48354ce NB |
3442 | len += 1; |
3443 | ||
3444 | if ((len + payload_len) > buffer_len) { | |
3445 | spin_unlock(&tpg->tpg_np_lock); | |
3446 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3447 | end_of_buf = 1; | |
3448 | goto eob; | |
3449 | } | |
e4f4e801 SG |
3450 | |
3451 | if (skip_bytes && len <= skip_bytes) { | |
3452 | skip_bytes -= len; | |
3453 | } else { | |
3454 | memcpy(payload + payload_len, buf, len); | |
3455 | payload_len += len; | |
3456 | if (len > skip_bytes) | |
3457 | skip_bytes = 0; | |
3458 | } | |
e48354ce NB |
3459 | } |
3460 | spin_unlock(&tpg->tpg_np_lock); | |
3461 | } | |
3462 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3463 | eob: | |
e4f4e801 SG |
3464 | if (end_of_buf) { |
3465 | *completed = false; | |
e48354ce | 3466 | break; |
e4f4e801 | 3467 | } |
6665889c | 3468 | |
8060b8dd | 3469 | if (cmd->cmd_flags & ICF_SENDTARGETS_SINGLE) |
6665889c | 3470 | break; |
e48354ce NB |
3471 | } |
3472 | spin_unlock(&tiqn_lock); | |
3473 | ||
3474 | cmd->buf_ptr = payload; | |
3475 | ||
3476 | return payload_len; | |
3477 | } | |
3478 | ||
889c8a68 NB |
3479 | int |
3480 | iscsit_build_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
22c7aaa5 SG |
3481 | struct iscsi_text_rsp *hdr, |
3482 | enum iscsit_transport_type network_transport) | |
e48354ce | 3483 | { |
889c8a68 | 3484 | int text_length, padding; |
e4f4e801 | 3485 | bool completed = true; |
e48354ce | 3486 | |
e4f4e801 SG |
3487 | text_length = iscsit_build_sendtargets_response(cmd, network_transport, |
3488 | cmd->read_data_done, | |
3489 | &completed); | |
e48354ce NB |
3490 | if (text_length < 0) |
3491 | return text_length; | |
3492 | ||
e4f4e801 SG |
3493 | if (completed) { |
3494 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3495 | } else { | |
3496 | hdr->flags |= ISCSI_FLAG_TEXT_CONTINUE; | |
3497 | cmd->read_data_done += text_length; | |
3498 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
3499 | cmd->targ_xfer_tag = session_get_next_ttt(conn->sess); | |
3500 | } | |
889c8a68 | 3501 | hdr->opcode = ISCSI_OP_TEXT_RSP; |
e48354ce | 3502 | padding = ((-text_length) & 3); |
e48354ce | 3503 | hton24(hdr->dlength, text_length); |
889c8a68 NB |
3504 | hdr->itt = cmd->init_task_tag; |
3505 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
3506 | cmd->stat_sn = conn->stat_sn++; | |
3507 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
e48354ce NB |
3508 | |
3509 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
e4f4e801 SG |
3510 | /* |
3511 | * Reset maxcmdsn_inc in multi-part text payload exchanges to | |
3512 | * correctly increment MaxCmdSN for each response answering a | |
3513 | * non immediate text request with a valid CmdSN. | |
3514 | */ | |
3515 | cmd->maxcmdsn_inc = 0; | |
889c8a68 | 3516 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); |
109e2381 | 3517 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
e48354ce | 3518 | |
e4f4e801 SG |
3519 | pr_debug("Built Text Response: ITT: 0x%08x, TTT: 0x%08x, StatSN: 0x%08x," |
3520 | " Length: %u, CID: %hu F: %d C: %d\n", cmd->init_task_tag, | |
3521 | cmd->targ_xfer_tag, cmd->stat_sn, text_length, conn->cid, | |
3522 | !!(hdr->flags & ISCSI_FLAG_CMD_FINAL), | |
3523 | !!(hdr->flags & ISCSI_FLAG_TEXT_CONTINUE)); | |
889c8a68 NB |
3524 | |
3525 | return text_length + padding; | |
3526 | } | |
3527 | EXPORT_SYMBOL(iscsit_build_text_rsp); | |
e48354ce | 3528 | |
889c8a68 NB |
3529 | static int iscsit_send_text_rsp( |
3530 | struct iscsi_cmd *cmd, | |
3531 | struct iscsi_conn *conn) | |
3532 | { | |
3533 | struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu; | |
2854bb23 | 3534 | int text_length; |
e48354ce | 3535 | |
864e504a VP |
3536 | text_length = iscsit_build_text_rsp(cmd, conn, hdr, |
3537 | conn->conn_transport->transport_type); | |
2854bb23 VP |
3538 | if (text_length < 0) |
3539 | return text_length; | |
e48354ce | 3540 | |
2854bb23 VP |
3541 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3542 | cmd->buf_ptr, | |
3543 | text_length); | |
e48354ce NB |
3544 | } |
3545 | ||
2ec5a8c1 NB |
3546 | void |
3547 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3548 | struct iscsi_reject *hdr) | |
3549 | { | |
3550 | hdr->opcode = ISCSI_OP_REJECT; | |
ba159914 | 3551 | hdr->reason = cmd->reject_reason; |
2ec5a8c1 NB |
3552 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; |
3553 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3554 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3555 | cmd->stat_sn = conn->stat_sn++; | |
3556 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3557 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
109e2381 | 3558 | hdr->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn)); |
2ec5a8c1 NB |
3559 | |
3560 | } | |
3561 | EXPORT_SYMBOL(iscsit_build_reject); | |
3562 | ||
e48354ce NB |
3563 | static int iscsit_send_reject( |
3564 | struct iscsi_cmd *cmd, | |
3565 | struct iscsi_conn *conn) | |
3566 | { | |
bfbdb31d | 3567 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3568 | |
bfbdb31d | 3569 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce | 3570 | |
e48354ce NB |
3571 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," |
3572 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3573 | ||
2854bb23 VP |
3574 | return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, |
3575 | cmd->buf_ptr, | |
3576 | ISCSI_HDR_LEN); | |
e48354ce NB |
3577 | } |
3578 | ||
e48354ce NB |
3579 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3580 | { | |
e48354ce NB |
3581 | int ord, cpu; |
3582 | /* | |
88dcd2da NB |
3583 | * bitmap_id is assigned from iscsit_global->ts_bitmap from |
3584 | * within iscsit_start_kthreads() | |
e48354ce | 3585 | * |
88dcd2da NB |
3586 | * Here we use bitmap_id to determine which CPU that this |
3587 | * iSCSI connection's RX/TX threads will be scheduled to | |
e48354ce NB |
3588 | * execute upon. |
3589 | */ | |
88dcd2da | 3590 | ord = conn->bitmap_id % cpumask_weight(cpu_online_mask); |
e48354ce NB |
3591 | for_each_online_cpu(cpu) { |
3592 | if (ord-- == 0) { | |
3593 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3594 | return; | |
3595 | } | |
3596 | } | |
3597 | /* | |
3598 | * This should never be reached.. | |
3599 | */ | |
3600 | dump_stack(); | |
3601 | cpumask_setall(conn->conn_cpumask); | |
3602 | } | |
3603 | ||
d2faaefb | 3604 | int |
2ec5a8c1 | 3605 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) |
e48354ce | 3606 | { |
6f3c0e69 AG |
3607 | int ret; |
3608 | ||
2ec5a8c1 NB |
3609 | switch (state) { |
3610 | case ISTATE_SEND_R2T: | |
3611 | ret = iscsit_send_r2t(cmd, conn); | |
3612 | if (ret < 0) | |
3613 | goto err; | |
3614 | break; | |
3615 | case ISTATE_REMOVE: | |
3616 | spin_lock_bh(&conn->cmd_lock); | |
5159d763 | 3617 | list_del_init(&cmd->i_conn_node); |
2ec5a8c1 | 3618 | spin_unlock_bh(&conn->cmd_lock); |
6f3c0e69 | 3619 | |
aafc9d15 | 3620 | iscsit_free_cmd(cmd, false); |
2ec5a8c1 NB |
3621 | break; |
3622 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3623 | iscsit_mod_nopin_response_timer(conn); | |
3624 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3625 | if (ret < 0) | |
6f3c0e69 | 3626 | goto err; |
2ec5a8c1 NB |
3627 | break; |
3628 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3629 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3630 | if (ret < 0) | |
3631 | goto err; | |
3632 | break; | |
3633 | default: | |
3634 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3635 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3636 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3637 | conn->cid); | |
3638 | goto err; | |
6f3c0e69 AG |
3639 | } |
3640 | ||
3641 | return 0; | |
3642 | ||
3643 | err: | |
3644 | return -1; | |
3645 | } | |
d2faaefb | 3646 | EXPORT_SYMBOL(iscsit_immediate_queue); |
6f3c0e69 | 3647 | |
2ec5a8c1 NB |
3648 | static int |
3649 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3650 | { |
2ec5a8c1 | 3651 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3652 | struct iscsi_queue_req *qr; |
3653 | struct iscsi_cmd *cmd; | |
3654 | u8 state; | |
3655 | int ret; | |
3656 | ||
2ec5a8c1 NB |
3657 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3658 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3659 | cmd = qr->cmd; |
3660 | state = qr->state; | |
3661 | kmem_cache_free(lio_qr_cache, qr); | |
3662 | ||
2ec5a8c1 NB |
3663 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3664 | if (ret < 0) | |
3665 | return ret; | |
3666 | } | |
fd3a9025 | 3667 | |
2ec5a8c1 NB |
3668 | return 0; |
3669 | } | |
6f3c0e69 | 3670 | |
d2faaefb | 3671 | int |
2ec5a8c1 NB |
3672 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) |
3673 | { | |
3674 | int ret; | |
3675 | ||
3676 | check_rsp_state: | |
3677 | switch (state) { | |
3678 | case ISTATE_SEND_DATAIN: | |
3679 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3680 | if (ret < 0) |
3681 | goto err; | |
2ec5a8c1 NB |
3682 | else if (!ret) |
3683 | /* more drs */ | |
3684 | goto check_rsp_state; | |
3685 | else if (ret == 1) { | |
3686 | /* all done */ | |
3687 | spin_lock_bh(&cmd->istate_lock); | |
3688 | cmd->i_state = ISTATE_SENT_STATUS; | |
3689 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3690 | |
2ec5a8c1 NB |
3691 | if (atomic_read(&conn->check_immediate_queue)) |
3692 | return 1; | |
6f3c0e69 | 3693 | |
2ec5a8c1 NB |
3694 | return 0; |
3695 | } else if (ret == 2) { | |
3696 | /* Still must send status, | |
3697 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3698 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3699 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3700 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3701 | state = ISTATE_SEND_STATUS; |
3702 | goto check_rsp_state; | |
3703 | } | |
3704 | ||
3705 | break; | |
3706 | case ISTATE_SEND_STATUS: | |
3707 | case ISTATE_SEND_STATUS_RECOVERY: | |
3708 | ret = iscsit_send_response(cmd, conn); | |
3709 | break; | |
3710 | case ISTATE_SEND_LOGOUTRSP: | |
3711 | ret = iscsit_send_logout(cmd, conn); | |
3712 | break; | |
3713 | case ISTATE_SEND_ASYNCMSG: | |
3714 | ret = iscsit_send_conn_drop_async_message( | |
3715 | cmd, conn); | |
3716 | break; | |
3717 | case ISTATE_SEND_NOPIN: | |
3718 | ret = iscsit_send_nopin(cmd, conn); | |
3719 | break; | |
3720 | case ISTATE_SEND_REJECT: | |
3721 | ret = iscsit_send_reject(cmd, conn); | |
3722 | break; | |
3723 | case ISTATE_SEND_TASKMGTRSP: | |
3724 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3725 | if (ret != 0) | |
6f3c0e69 | 3726 | break; |
2ec5a8c1 NB |
3727 | ret = iscsit_tmr_post_handler(cmd, conn); |
3728 | if (ret != 0) | |
3729 | iscsit_fall_back_to_erl0(conn->sess); | |
3730 | break; | |
3731 | case ISTATE_SEND_TEXTRSP: | |
3732 | ret = iscsit_send_text_rsp(cmd, conn); | |
3733 | break; | |
3734 | default: | |
3735 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3736 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3737 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3738 | state, conn->cid); | |
3739 | goto err; | |
3740 | } | |
3741 | if (ret < 0) | |
3742 | goto err; | |
3743 | ||
2ec5a8c1 NB |
3744 | switch (state) { |
3745 | case ISTATE_SEND_LOGOUTRSP: | |
3746 | if (!iscsit_logout_post_handler(cmd, conn)) | |
88dcd2da | 3747 | return -ECONNRESET; |
2ec5a8c1 NB |
3748 | /* fall through */ |
3749 | case ISTATE_SEND_STATUS: | |
3750 | case ISTATE_SEND_ASYNCMSG: | |
3751 | case ISTATE_SEND_NOPIN: | |
3752 | case ISTATE_SEND_STATUS_RECOVERY: | |
3753 | case ISTATE_SEND_TEXTRSP: | |
3754 | case ISTATE_SEND_TASKMGTRSP: | |
ba159914 | 3755 | case ISTATE_SEND_REJECT: |
2ec5a8c1 NB |
3756 | spin_lock_bh(&cmd->istate_lock); |
3757 | cmd->i_state = ISTATE_SENT_STATUS; | |
3758 | spin_unlock_bh(&cmd->istate_lock); | |
3759 | break; | |
2ec5a8c1 NB |
3760 | default: |
3761 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3762 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3763 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3764 | cmd->i_state, conn->cid); | |
3765 | goto err; | |
6f3c0e69 AG |
3766 | } |
3767 | ||
2ec5a8c1 NB |
3768 | if (atomic_read(&conn->check_immediate_queue)) |
3769 | return 1; | |
3770 | ||
6f3c0e69 AG |
3771 | return 0; |
3772 | ||
3773 | err: | |
3774 | return -1; | |
6f3c0e69 | 3775 | } |
d2faaefb | 3776 | EXPORT_SYMBOL(iscsit_response_queue); |
6f3c0e69 | 3777 | |
2ec5a8c1 NB |
3778 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3779 | { | |
3780 | struct iscsit_transport *t = conn->conn_transport; | |
3781 | struct iscsi_queue_req *qr; | |
3782 | struct iscsi_cmd *cmd; | |
3783 | u8 state; | |
3784 | int ret; | |
3785 | ||
3786 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3787 | cmd = qr->cmd; | |
3788 | state = qr->state; | |
3789 | kmem_cache_free(lio_qr_cache, qr); | |
3790 | ||
3791 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3792 | if (ret == 1 || ret < 0) | |
3793 | return ret; | |
3794 | } | |
3795 | ||
3796 | return 0; | |
3797 | } | |
3798 | ||
6f3c0e69 AG |
3799 | int iscsi_target_tx_thread(void *arg) |
3800 | { | |
e48354ce | 3801 | int ret = 0; |
88dcd2da | 3802 | struct iscsi_conn *conn = arg; |
e48354ce NB |
3803 | /* |
3804 | * Allow ourselves to be interrupted by SIGINT so that a | |
3805 | * connection recovery / failure event can be triggered externally. | |
3806 | */ | |
3807 | allow_signal(SIGINT); | |
3808 | ||
e48354ce NB |
3809 | while (!kthread_should_stop()) { |
3810 | /* | |
3811 | * Ensure that both TX and RX per connection kthreads | |
3812 | * are scheduled to run on the same CPU. | |
3813 | */ | |
3814 | iscsit_thread_check_cpumask(conn, current, 1); | |
3815 | ||
d5627acb | 3816 | wait_event_interruptible(conn->queues_wq, |
88dcd2da | 3817 | !iscsit_conn_all_queues_empty(conn)); |
e48354ce | 3818 | |
88dcd2da | 3819 | if (signal_pending(current)) |
e48354ce NB |
3820 | goto transport_err; |
3821 | ||
fd3a9025 | 3822 | get_immediate: |
2ec5a8c1 | 3823 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3824 | if (ret < 0) |
3825 | goto transport_err; | |
e48354ce | 3826 | |
2ec5a8c1 | 3827 | ret = iscsit_handle_response_queue(conn); |
fd3a9025 NB |
3828 | if (ret == 1) |
3829 | goto get_immediate; | |
88dcd2da NB |
3830 | else if (ret == -ECONNRESET) |
3831 | goto out; | |
6f3c0e69 AG |
3832 | else if (ret < 0) |
3833 | goto transport_err; | |
e48354ce NB |
3834 | } |
3835 | ||
3836 | transport_err: | |
e5419865 NB |
3837 | /* |
3838 | * Avoid the normal connection failure code-path if this connection | |
3839 | * is still within LOGIN mode, and iscsi_np process context is | |
3840 | * responsible for cleaning up the early connection failure. | |
3841 | */ | |
3842 | if (conn->conn_state != TARG_CONN_STATE_IN_LOGIN) | |
3843 | iscsit_take_action_for_connection_exit(conn); | |
e48354ce NB |
3844 | out: |
3845 | return 0; | |
3846 | } | |
3847 | ||
3e1c81a9 NB |
3848 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
3849 | { | |
3850 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
3851 | struct iscsi_cmd *cmd; | |
3852 | int ret = 0; | |
3853 | ||
3854 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
3855 | case ISCSI_OP_SCSI_CMD: | |
676687c6 | 3856 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3857 | if (!cmd) |
ba159914 | 3858 | goto reject; |
3e1c81a9 NB |
3859 | |
3860 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
3861 | break; | |
3862 | case ISCSI_OP_SCSI_DATA_OUT: | |
3863 | ret = iscsit_handle_data_out(conn, buf); | |
3864 | break; | |
3865 | case ISCSI_OP_NOOP_OUT: | |
3866 | cmd = NULL; | |
3867 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
676687c6 | 3868 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3869 | if (!cmd) |
ba159914 | 3870 | goto reject; |
3e1c81a9 NB |
3871 | } |
3872 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
3873 | break; | |
3874 | case ISCSI_OP_SCSI_TMFUNC: | |
676687c6 | 3875 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3876 | if (!cmd) |
ba159914 | 3877 | goto reject; |
3e1c81a9 NB |
3878 | |
3879 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
3880 | break; | |
3881 | case ISCSI_OP_TEXT: | |
e4f4e801 SG |
3882 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { |
3883 | cmd = iscsit_find_cmd_from_itt(conn, hdr->itt); | |
3884 | if (!cmd) | |
3885 | goto reject; | |
3886 | } else { | |
3887 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); | |
3888 | if (!cmd) | |
3889 | goto reject; | |
3890 | } | |
64534aa7 NB |
3891 | |
3892 | ret = iscsit_handle_text_cmd(conn, cmd, buf); | |
3e1c81a9 NB |
3893 | break; |
3894 | case ISCSI_OP_LOGOUT: | |
676687c6 | 3895 | cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); |
3e1c81a9 | 3896 | if (!cmd) |
ba159914 | 3897 | goto reject; |
3e1c81a9 NB |
3898 | |
3899 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
3900 | if (ret > 0) | |
3901 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3902 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3903 | break; | |
3904 | case ISCSI_OP_SNACK: | |
3905 | ret = iscsit_handle_snack(conn, buf); | |
3906 | break; | |
3907 | default: | |
3908 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
3909 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
3910 | pr_err("Cannot recover from unknown" | |
3911 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
3912 | return -1; | |
3913 | } | |
c04a6091 CVB |
3914 | pr_err("Unable to recover from unknown opcode while OFMarker=No," |
3915 | " closing iSCSI connection.\n"); | |
3916 | ret = -1; | |
3e1c81a9 NB |
3917 | break; |
3918 | } | |
3919 | ||
3920 | return ret; | |
ba159914 NB |
3921 | reject: |
3922 | return iscsit_add_reject(conn, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); | |
3e1c81a9 NB |
3923 | } |
3924 | ||
ca82c2bd NB |
3925 | static bool iscsi_target_check_conn_state(struct iscsi_conn *conn) |
3926 | { | |
3927 | bool ret; | |
3928 | ||
3929 | spin_lock_bh(&conn->state_lock); | |
3930 | ret = (conn->conn_state != TARG_CONN_STATE_LOGGED_IN); | |
3931 | spin_unlock_bh(&conn->state_lock); | |
3932 | ||
3933 | return ret; | |
3934 | } | |
3935 | ||
e8205cca | 3936 | static void iscsit_get_rx_pdu(struct iscsi_conn *conn) |
e48354ce | 3937 | { |
e8205cca | 3938 | int ret; |
e48354ce NB |
3939 | u8 buffer[ISCSI_HDR_LEN], opcode; |
3940 | u32 checksum = 0, digest = 0; | |
e48354ce | 3941 | struct kvec iov; |
3e1c81a9 | 3942 | |
e48354ce NB |
3943 | while (!kthread_should_stop()) { |
3944 | /* | |
3945 | * Ensure that both TX and RX per connection kthreads | |
3946 | * are scheduled to run on the same CPU. | |
3947 | */ | |
3948 | iscsit_thread_check_cpumask(conn, current, 0); | |
3949 | ||
3950 | memset(buffer, 0, ISCSI_HDR_LEN); | |
3951 | memset(&iov, 0, sizeof(struct kvec)); | |
3952 | ||
3953 | iov.iov_base = buffer; | |
3954 | iov.iov_len = ISCSI_HDR_LEN; | |
3955 | ||
3956 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
3957 | if (ret != ISCSI_HDR_LEN) { | |
3958 | iscsit_rx_thread_wait_for_tcp(conn); | |
e8205cca | 3959 | return; |
e48354ce NB |
3960 | } |
3961 | ||
e48354ce NB |
3962 | if (conn->conn_ops->HeaderDigest) { |
3963 | iov.iov_base = &digest; | |
3964 | iov.iov_len = ISCSI_CRC_LEN; | |
3965 | ||
3966 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
3967 | if (ret != ISCSI_CRC_LEN) { | |
3968 | iscsit_rx_thread_wait_for_tcp(conn); | |
e8205cca | 3969 | return; |
e48354ce NB |
3970 | } |
3971 | ||
69110e3c | 3972 | iscsit_do_crypto_hash_buf(conn->conn_rx_hash, |
e48354ce NB |
3973 | buffer, ISCSI_HDR_LEN, |
3974 | 0, NULL, (u8 *)&checksum); | |
3975 | ||
3976 | if (digest != checksum) { | |
3977 | pr_err("HeaderDigest CRC32C failed," | |
3978 | " received 0x%08x, computed 0x%08x\n", | |
3979 | digest, checksum); | |
3980 | /* | |
3981 | * Set the PDU to 0xff so it will intentionally | |
3982 | * hit default in the switch below. | |
3983 | */ | |
3984 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
04f3b31b | 3985 | atomic_long_inc(&conn->sess->conn_digest_errors); |
e48354ce NB |
3986 | } else { |
3987 | pr_debug("Got HeaderDigest CRC32C" | |
3988 | " 0x%08x\n", checksum); | |
3989 | } | |
3990 | } | |
3991 | ||
3992 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
e8205cca | 3993 | return; |
e48354ce NB |
3994 | |
3995 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
3996 | ||
3997 | if (conn->sess->sess_ops->SessionType && | |
3998 | ((!(opcode & ISCSI_OP_TEXT)) || | |
3999 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
4000 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
4001 | " while in Discovery Session, rejecting.\n", opcode); | |
ba159914 NB |
4002 | iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR, |
4003 | buffer); | |
e8205cca | 4004 | return; |
e48354ce NB |
4005 | } |
4006 | ||
3e1c81a9 NB |
4007 | ret = iscsi_target_rx_opcode(conn, buffer); |
4008 | if (ret < 0) | |
e8205cca | 4009 | return; |
e48354ce | 4010 | } |
e8205cca VP |
4011 | } |
4012 | ||
4013 | int iscsi_target_rx_thread(void *arg) | |
4014 | { | |
4015 | int rc; | |
4016 | struct iscsi_conn *conn = arg; | |
4017 | ||
4018 | /* | |
4019 | * Allow ourselves to be interrupted by SIGINT so that a | |
4020 | * connection recovery / failure event can be triggered externally. | |
4021 | */ | |
4022 | allow_signal(SIGINT); | |
4023 | /* | |
4024 | * Wait for iscsi_post_login_handler() to complete before allowing | |
4025 | * incoming iscsi/tcp socket I/O, and/or failing the connection. | |
4026 | */ | |
4027 | rc = wait_for_completion_interruptible(&conn->rx_login_comp); | |
4028 | if (rc < 0 || iscsi_target_check_conn_state(conn)) | |
4029 | return 0; | |
4030 | ||
4031 | if (!conn->conn_transport->iscsit_get_rx_pdu) | |
4032 | return 0; | |
4033 | ||
4034 | conn->conn_transport->iscsit_get_rx_pdu(conn); | |
e48354ce | 4035 | |
e48354ce NB |
4036 | if (!signal_pending(current)) |
4037 | atomic_set(&conn->transport_failed, 1); | |
4038 | iscsit_take_action_for_connection_exit(conn); | |
e48354ce NB |
4039 | return 0; |
4040 | } | |
4041 | ||
4042 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4043 | { | |
064cdd2d | 4044 | LIST_HEAD(tmp_list); |
e48354ce NB |
4045 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; |
4046 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4047 | /* |
4048 | * We expect this function to only ever be called from either RX or TX | |
4049 | * thread context via iscsit_close_connection() once the other context | |
4050 | * has been reset -> returned sleeping pre-handler state. | |
4051 | */ | |
4052 | spin_lock_bh(&conn->cmd_lock); | |
064cdd2d | 4053 | list_splice_init(&conn->conn_cmd_list, &tmp_list); |
e48354ce | 4054 | |
064cdd2d NB |
4055 | list_for_each_entry(cmd, &tmp_list, i_conn_node) { |
4056 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
4057 | ||
4058 | if (se_cmd->se_tfo != NULL) { | |
4059 | spin_lock(&se_cmd->t_state_lock); | |
4060 | se_cmd->transport_state |= CMD_T_FABRIC_STOP; | |
4061 | spin_unlock(&se_cmd->t_state_lock); | |
4062 | } | |
4063 | } | |
4064 | spin_unlock_bh(&conn->cmd_lock); | |
4065 | ||
4066 | list_for_each_entry_safe(cmd, cmd_tmp, &tmp_list, i_conn_node) { | |
5159d763 | 4067 | list_del_init(&cmd->i_conn_node); |
e48354ce NB |
4068 | |
4069 | iscsit_increment_maxcmdsn(cmd, sess); | |
aafc9d15 | 4070 | iscsit_free_cmd(cmd, true); |
e48354ce | 4071 | |
e48354ce | 4072 | } |
e48354ce NB |
4073 | } |
4074 | ||
4075 | static void iscsit_stop_timers_for_cmds( | |
4076 | struct iscsi_conn *conn) | |
4077 | { | |
4078 | struct iscsi_cmd *cmd; | |
4079 | ||
4080 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4081 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4082 | if (cmd->data_direction == DMA_TO_DEVICE) |
4083 | iscsit_stop_dataout_timer(cmd); | |
4084 | } | |
4085 | spin_unlock_bh(&conn->cmd_lock); | |
4086 | } | |
4087 | ||
4088 | int iscsit_close_connection( | |
4089 | struct iscsi_conn *conn) | |
4090 | { | |
4091 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4092 | struct iscsi_session *sess = conn->sess; | |
4093 | ||
4094 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4095 | " %u\n", conn->cid, sess->sid); | |
4096 | /* | |
b4869ee9 VP |
4097 | * Always up conn_logout_comp for the traditional TCP and HW_OFFLOAD |
4098 | * case just in case the RX Thread in iscsi_target_rx_opcode() is | |
4099 | * sleeping and the logout response never got sent because the | |
4100 | * connection failed. | |
f068fbc8 NB |
4101 | * |
4102 | * However for iser-target, isert_wait4logout() is using conn_logout_comp | |
4103 | * to signal logout response TX interrupt completion. Go ahead and skip | |
4104 | * this for iser since isert_rx_opcode() does not wait on logout failure, | |
4105 | * and to avoid iscsi_conn pointer dereference in iser-target code. | |
e48354ce | 4106 | */ |
bd027d85 | 4107 | if (!conn->conn_transport->rdma_shutdown) |
f068fbc8 | 4108 | complete(&conn->conn_logout_comp); |
e48354ce | 4109 | |
88dcd2da NB |
4110 | if (!strcmp(current->comm, ISCSI_RX_THREAD_NAME)) { |
4111 | if (conn->tx_thread && | |
4112 | cmpxchg(&conn->tx_thread_active, true, false)) { | |
4113 | send_sig(SIGINT, conn->tx_thread, 1); | |
4114 | kthread_stop(conn->tx_thread); | |
4115 | } | |
4116 | } else if (!strcmp(current->comm, ISCSI_TX_THREAD_NAME)) { | |
4117 | if (conn->rx_thread && | |
4118 | cmpxchg(&conn->rx_thread_active, true, false)) { | |
4119 | send_sig(SIGINT, conn->rx_thread, 1); | |
4120 | kthread_stop(conn->rx_thread); | |
4121 | } | |
4122 | } | |
4123 | ||
4124 | spin_lock(&iscsit_global->ts_bitmap_lock); | |
4125 | bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id, | |
4126 | get_order(1)); | |
4127 | spin_unlock(&iscsit_global->ts_bitmap_lock); | |
e48354ce NB |
4128 | |
4129 | iscsit_stop_timers_for_cmds(conn); | |
4130 | iscsit_stop_nopin_response_timer(conn); | |
4131 | iscsit_stop_nopin_timer(conn); | |
defd8848 NB |
4132 | |
4133 | if (conn->conn_transport->iscsit_wait_conn) | |
4134 | conn->conn_transport->iscsit_wait_conn(conn); | |
4135 | ||
e48354ce NB |
4136 | /* |
4137 | * During Connection recovery drop unacknowledged out of order | |
4138 | * commands for this connection, and prepare the other commands | |
4139 | * for realligence. | |
4140 | * | |
4141 | * During normal operation clear the out of order commands (but | |
4142 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4143 | * struct iscsi_cmds. | |
4144 | */ | |
4145 | if (atomic_read(&conn->connection_recovery)) { | |
4146 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4147 | iscsit_prepare_cmds_for_realligance(conn); | |
4148 | } else { | |
4149 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4150 | iscsit_release_commands_from_conn(conn); | |
4151 | } | |
bbc05048 | 4152 | iscsit_free_queue_reqs_for_conn(conn); |
e48354ce NB |
4153 | |
4154 | /* | |
4155 | * Handle decrementing session or connection usage count if | |
4156 | * a logout response was not able to be sent because the | |
4157 | * connection failed. Fall back to Session Recovery here. | |
4158 | */ | |
4159 | if (atomic_read(&conn->conn_logout_remove)) { | |
4160 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4161 | iscsit_dec_conn_usage_count(conn); | |
4162 | iscsit_dec_session_usage_count(sess); | |
4163 | } | |
4164 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4165 | iscsit_dec_conn_usage_count(conn); | |
4166 | ||
4167 | atomic_set(&conn->conn_logout_remove, 0); | |
4168 | atomic_set(&sess->session_reinstatement, 0); | |
4169 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4170 | } | |
4171 | ||
4172 | spin_lock_bh(&sess->conn_lock); | |
4173 | list_del(&conn->conn_list); | |
4174 | ||
4175 | /* | |
4176 | * Attempt to let the Initiator know this connection failed by | |
4177 | * sending an Connection Dropped Async Message on another | |
4178 | * active connection. | |
4179 | */ | |
4180 | if (atomic_read(&conn->connection_recovery)) | |
4181 | iscsit_build_conn_drop_async_message(conn); | |
4182 | ||
4183 | spin_unlock_bh(&sess->conn_lock); | |
4184 | ||
4185 | /* | |
4186 | * If connection reinstatement is being performed on this connection, | |
4187 | * up the connection reinstatement semaphore that is being blocked on | |
4188 | * in iscsit_cause_connection_reinstatement(). | |
4189 | */ | |
4190 | spin_lock_bh(&conn->state_lock); | |
4191 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4192 | spin_unlock_bh(&conn->state_lock); | |
4193 | complete(&conn->conn_wait_comp); | |
4194 | wait_for_completion(&conn->conn_post_wait_comp); | |
4195 | spin_lock_bh(&conn->state_lock); | |
4196 | } | |
4197 | ||
4198 | /* | |
4199 | * If connection reinstatement is being performed on this connection | |
4200 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4201 | * connection wait rcfr semaphore that is being blocked on | |
4202 | * an iscsit_connection_reinstatement_rcfr(). | |
4203 | */ | |
4204 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4205 | spin_unlock_bh(&conn->state_lock); | |
4206 | complete(&conn->conn_wait_rcfr_comp); | |
4207 | wait_for_completion(&conn->conn_post_wait_comp); | |
4208 | spin_lock_bh(&conn->state_lock); | |
4209 | } | |
4210 | atomic_set(&conn->connection_reinstatement, 1); | |
4211 | spin_unlock_bh(&conn->state_lock); | |
4212 | ||
4213 | /* | |
4214 | * If any other processes are accessing this connection pointer we | |
4215 | * must wait until they have completed. | |
4216 | */ | |
4217 | iscsit_check_conn_usage_count(conn); | |
4218 | ||
69110e3c HX |
4219 | ahash_request_free(conn->conn_tx_hash); |
4220 | if (conn->conn_rx_hash) { | |
4221 | struct crypto_ahash *tfm; | |
4222 | ||
4223 | tfm = crypto_ahash_reqtfm(conn->conn_rx_hash); | |
4224 | ahash_request_free(conn->conn_rx_hash); | |
4225 | crypto_free_ahash(tfm); | |
4226 | } | |
e48354ce | 4227 | |
fbecb659 | 4228 | free_cpumask_var(conn->conn_cpumask); |
e48354ce NB |
4229 | |
4230 | kfree(conn->conn_ops); | |
4231 | conn->conn_ops = NULL; | |
4232 | ||
bf6932f4 | 4233 | if (conn->sock) |
e48354ce | 4234 | sock_release(conn->sock); |
baa4d64b NB |
4235 | |
4236 | if (conn->conn_transport->iscsit_free_conn) | |
4237 | conn->conn_transport->iscsit_free_conn(conn); | |
4238 | ||
4239 | iscsit_put_transport(conn->conn_transport); | |
4240 | ||
e48354ce NB |
4241 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); |
4242 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4243 | kfree(conn); | |
4244 | ||
4245 | spin_lock_bh(&sess->conn_lock); | |
4246 | atomic_dec(&sess->nconn); | |
4247 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4248 | " %s\n", atomic_read(&sess->nconn), | |
4249 | sess->sess_ops->InitiatorName); | |
4250 | /* | |
4251 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4252 | * Session that they all fail. | |
4253 | */ | |
4254 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4255 | !atomic_read(&sess->session_logout)) | |
4256 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4257 | ||
4258 | /* | |
4259 | * If this was not the last connection in the session, and we are | |
4260 | * performing session reinstatement or falling back to ERL=0, call | |
4261 | * iscsit_stop_session() without sleeping to shutdown the other | |
4262 | * active connections. | |
4263 | */ | |
4264 | if (atomic_read(&sess->nconn)) { | |
4265 | if (!atomic_read(&sess->session_reinstatement) && | |
4266 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4267 | spin_unlock_bh(&sess->conn_lock); | |
4268 | return 0; | |
4269 | } | |
4270 | if (!atomic_read(&sess->session_stop_active)) { | |
4271 | atomic_set(&sess->session_stop_active, 1); | |
4272 | spin_unlock_bh(&sess->conn_lock); | |
4273 | iscsit_stop_session(sess, 0, 0); | |
4274 | return 0; | |
4275 | } | |
4276 | spin_unlock_bh(&sess->conn_lock); | |
4277 | return 0; | |
4278 | } | |
4279 | ||
4280 | /* | |
4281 | * If this was the last connection in the session and one of the | |
4282 | * following is occurring: | |
4283 | * | |
4284 | * Session Reinstatement is not being performed, and are falling back | |
4285 | * to ERL=0 call iscsit_close_session(). | |
4286 | * | |
4287 | * Session Logout was requested. iscsit_close_session() will be called | |
4288 | * elsewhere. | |
4289 | * | |
4290 | * Session Continuation is not being performed, start the Time2Retain | |
4291 | * handler and check if sleep_on_sess_wait_sem is active. | |
4292 | */ | |
4293 | if (!atomic_read(&sess->session_reinstatement) && | |
4294 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4295 | spin_unlock_bh(&sess->conn_lock); | |
44f33d0f | 4296 | iscsit_close_session(sess); |
e48354ce NB |
4297 | |
4298 | return 0; | |
4299 | } else if (atomic_read(&sess->session_logout)) { | |
4300 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4301 | sess->session_state = TARG_SESS_STATE_FREE; | |
4302 | spin_unlock_bh(&sess->conn_lock); | |
4303 | ||
4304 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4305 | complete(&sess->session_wait_comp); | |
4306 | ||
4307 | return 0; | |
4308 | } else { | |
4309 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4310 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4311 | ||
4312 | if (!atomic_read(&sess->session_continuation)) { | |
4313 | spin_unlock_bh(&sess->conn_lock); | |
4314 | iscsit_start_time2retain_handler(sess); | |
4315 | } else | |
4316 | spin_unlock_bh(&sess->conn_lock); | |
4317 | ||
4318 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4319 | complete(&sess->session_wait_comp); | |
4320 | ||
4321 | return 0; | |
4322 | } | |
e48354ce NB |
4323 | } |
4324 | ||
44f33d0f CH |
4325 | /* |
4326 | * If the iSCSI Session for the iSCSI Initiator Node exists, | |
4327 | * forcefully shutdown the iSCSI NEXUS. | |
4328 | */ | |
e48354ce NB |
4329 | int iscsit_close_session(struct iscsi_session *sess) |
4330 | { | |
60bfcf8e | 4331 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
4332 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
4333 | ||
4334 | if (atomic_read(&sess->nconn)) { | |
4335 | pr_err("%d connection(s) still exist for iSCSI session" | |
4336 | " to %s\n", atomic_read(&sess->nconn), | |
4337 | sess->sess_ops->InitiatorName); | |
4338 | BUG(); | |
4339 | } | |
4340 | ||
4341 | spin_lock_bh(&se_tpg->session_lock); | |
4342 | atomic_set(&sess->session_logout, 1); | |
4343 | atomic_set(&sess->session_reinstatement, 1); | |
4344 | iscsit_stop_time2retain_timer(sess); | |
4345 | spin_unlock_bh(&se_tpg->session_lock); | |
4346 | ||
4347 | /* | |
4348 | * transport_deregister_session_configfs() will clear the | |
4349 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4350 | * can be setting it again with __transport_register_session() in | |
4351 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4352 | * completes in iscsi_np context. | |
4353 | */ | |
4354 | transport_deregister_session_configfs(sess->se_sess); | |
4355 | ||
4356 | /* | |
4357 | * If any other processes are accessing this session pointer we must | |
4358 | * wait until they have completed. If we are in an interrupt (the | |
4359 | * time2retain handler) and contain and active session usage count we | |
4360 | * restart the timer and exit. | |
4361 | */ | |
4362 | if (!in_interrupt()) { | |
4363 | if (iscsit_check_session_usage_count(sess) == 1) | |
4364 | iscsit_stop_session(sess, 1, 1); | |
4365 | } else { | |
4366 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4367 | atomic_set(&sess->session_logout, 0); | |
4368 | iscsit_start_time2retain_handler(sess); | |
4369 | return 0; | |
4370 | } | |
4371 | } | |
4372 | ||
4373 | transport_deregister_session(sess->se_sess); | |
4374 | ||
4375 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4376 | iscsit_free_connection_recovery_entires(sess); | |
4377 | ||
4378 | iscsit_free_all_ooo_cmdsns(sess); | |
4379 | ||
4380 | spin_lock_bh(&se_tpg->session_lock); | |
4381 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4382 | sess->session_state = TARG_SESS_STATE_FREE; | |
4383 | pr_debug("Released iSCSI session from node: %s\n", | |
4384 | sess->sess_ops->InitiatorName); | |
4385 | tpg->nsessions--; | |
4386 | if (tpg->tpg_tiqn) | |
4387 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4388 | ||
4389 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4390 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4391 | ||
4392 | spin_lock(&sess_idr_lock); | |
4393 | idr_remove(&sess_idr, sess->session_index); | |
4394 | spin_unlock(&sess_idr_lock); | |
4395 | ||
4396 | kfree(sess->sess_ops); | |
4397 | sess->sess_ops = NULL; | |
4398 | spin_unlock_bh(&se_tpg->session_lock); | |
4399 | ||
4400 | kfree(sess); | |
4401 | return 0; | |
4402 | } | |
4403 | ||
4404 | static void iscsit_logout_post_handler_closesession( | |
4405 | struct iscsi_conn *conn) | |
4406 | { | |
4407 | struct iscsi_session *sess = conn->sess; | |
007d038b NB |
4408 | int sleep = 1; |
4409 | /* | |
4410 | * Traditional iscsi/tcp will invoke this logic from TX thread | |
4411 | * context during session logout, so clear tx_thread_active and | |
4412 | * sleep if iscsit_close_connection() has not already occured. | |
4413 | * | |
4414 | * Since iser-target invokes this logic from it's own workqueue, | |
4415 | * always sleep waiting for RX/TX thread shutdown to complete | |
4416 | * within iscsit_close_connection(). | |
4417 | */ | |
bd027d85 | 4418 | if (!conn->conn_transport->rdma_shutdown) |
007d038b | 4419 | sleep = cmpxchg(&conn->tx_thread_active, true, false); |
e48354ce NB |
4420 | |
4421 | atomic_set(&conn->conn_logout_remove, 0); | |
4422 | complete(&conn->conn_logout_comp); | |
4423 | ||
4424 | iscsit_dec_conn_usage_count(conn); | |
88dcd2da | 4425 | iscsit_stop_session(sess, sleep, sleep); |
e48354ce | 4426 | iscsit_dec_session_usage_count(sess); |
44f33d0f | 4427 | iscsit_close_session(sess); |
e48354ce NB |
4428 | } |
4429 | ||
4430 | static void iscsit_logout_post_handler_samecid( | |
4431 | struct iscsi_conn *conn) | |
4432 | { | |
007d038b NB |
4433 | int sleep = 1; |
4434 | ||
bd027d85 | 4435 | if (!conn->conn_transport->rdma_shutdown) |
007d038b | 4436 | sleep = cmpxchg(&conn->tx_thread_active, true, false); |
e48354ce NB |
4437 | |
4438 | atomic_set(&conn->conn_logout_remove, 0); | |
4439 | complete(&conn->conn_logout_comp); | |
4440 | ||
88dcd2da | 4441 | iscsit_cause_connection_reinstatement(conn, sleep); |
e48354ce NB |
4442 | iscsit_dec_conn_usage_count(conn); |
4443 | } | |
4444 | ||
4445 | static void iscsit_logout_post_handler_diffcid( | |
4446 | struct iscsi_conn *conn, | |
4447 | u16 cid) | |
4448 | { | |
4449 | struct iscsi_conn *l_conn; | |
4450 | struct iscsi_session *sess = conn->sess; | |
b53b0d99 | 4451 | bool conn_found = false; |
e48354ce NB |
4452 | |
4453 | if (!sess) | |
4454 | return; | |
4455 | ||
4456 | spin_lock_bh(&sess->conn_lock); | |
4457 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4458 | if (l_conn->cid == cid) { | |
4459 | iscsit_inc_conn_usage_count(l_conn); | |
b53b0d99 | 4460 | conn_found = true; |
e48354ce NB |
4461 | break; |
4462 | } | |
4463 | } | |
4464 | spin_unlock_bh(&sess->conn_lock); | |
4465 | ||
b53b0d99 | 4466 | if (!conn_found) |
e48354ce NB |
4467 | return; |
4468 | ||
4469 | if (l_conn->sock) | |
4470 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4471 | ||
4472 | spin_lock_bh(&l_conn->state_lock); | |
4473 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4474 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4475 | spin_unlock_bh(&l_conn->state_lock); | |
4476 | ||
4477 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4478 | iscsit_dec_conn_usage_count(l_conn); | |
4479 | } | |
4480 | ||
4481 | /* | |
4482 | * Return of 0 causes the TX thread to restart. | |
4483 | */ | |
2ec5a8c1 | 4484 | int iscsit_logout_post_handler( |
e48354ce NB |
4485 | struct iscsi_cmd *cmd, |
4486 | struct iscsi_conn *conn) | |
4487 | { | |
4488 | int ret = 0; | |
4489 | ||
4490 | switch (cmd->logout_reason) { | |
4491 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4492 | switch (cmd->logout_response) { | |
4493 | case ISCSI_LOGOUT_SUCCESS: | |
4494 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4495 | default: | |
4496 | iscsit_logout_post_handler_closesession(conn); | |
4497 | break; | |
4498 | } | |
4499 | ret = 0; | |
4500 | break; | |
4501 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4502 | if (conn->cid == cmd->logout_cid) { | |
4503 | switch (cmd->logout_response) { | |
4504 | case ISCSI_LOGOUT_SUCCESS: | |
4505 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4506 | default: | |
4507 | iscsit_logout_post_handler_samecid(conn); | |
4508 | break; | |
4509 | } | |
4510 | ret = 0; | |
4511 | } else { | |
4512 | switch (cmd->logout_response) { | |
4513 | case ISCSI_LOGOUT_SUCCESS: | |
4514 | iscsit_logout_post_handler_diffcid(conn, | |
4515 | cmd->logout_cid); | |
4516 | break; | |
4517 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4518 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4519 | default: | |
4520 | break; | |
4521 | } | |
4522 | ret = 1; | |
4523 | } | |
4524 | break; | |
4525 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4526 | switch (cmd->logout_response) { | |
4527 | case ISCSI_LOGOUT_SUCCESS: | |
4528 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4529 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4530 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4531 | default: | |
4532 | break; | |
4533 | } | |
4534 | ret = 1; | |
4535 | break; | |
4536 | default: | |
4537 | break; | |
4538 | ||
4539 | } | |
4540 | return ret; | |
4541 | } | |
2ec5a8c1 | 4542 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4543 | |
4544 | void iscsit_fail_session(struct iscsi_session *sess) | |
4545 | { | |
4546 | struct iscsi_conn *conn; | |
4547 | ||
4548 | spin_lock_bh(&sess->conn_lock); | |
4549 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4550 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4551 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4552 | } | |
4553 | spin_unlock_bh(&sess->conn_lock); | |
4554 | ||
4555 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4556 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4557 | } | |
4558 | ||
4559 | int iscsit_free_session(struct iscsi_session *sess) | |
4560 | { | |
4561 | u16 conn_count = atomic_read(&sess->nconn); | |
4562 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4563 | int is_last; | |
4564 | ||
4565 | spin_lock_bh(&sess->conn_lock); | |
4566 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4567 | ||
4568 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4569 | conn_list) { | |
4570 | if (conn_count == 0) | |
4571 | break; | |
4572 | ||
4573 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4574 | is_last = 1; | |
4575 | } else { | |
4576 | iscsit_inc_conn_usage_count(conn_tmp); | |
4577 | is_last = 0; | |
4578 | } | |
4579 | iscsit_inc_conn_usage_count(conn); | |
4580 | ||
4581 | spin_unlock_bh(&sess->conn_lock); | |
4582 | iscsit_cause_connection_reinstatement(conn, 1); | |
4583 | spin_lock_bh(&sess->conn_lock); | |
4584 | ||
4585 | iscsit_dec_conn_usage_count(conn); | |
4586 | if (is_last == 0) | |
4587 | iscsit_dec_conn_usage_count(conn_tmp); | |
4588 | ||
4589 | conn_count--; | |
4590 | } | |
4591 | ||
4592 | if (atomic_read(&sess->nconn)) { | |
4593 | spin_unlock_bh(&sess->conn_lock); | |
4594 | wait_for_completion(&sess->session_wait_comp); | |
4595 | } else | |
4596 | spin_unlock_bh(&sess->conn_lock); | |
4597 | ||
44f33d0f | 4598 | iscsit_close_session(sess); |
e48354ce NB |
4599 | return 0; |
4600 | } | |
4601 | ||
4602 | void iscsit_stop_session( | |
4603 | struct iscsi_session *sess, | |
4604 | int session_sleep, | |
4605 | int connection_sleep) | |
4606 | { | |
4607 | u16 conn_count = atomic_read(&sess->nconn); | |
4608 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4609 | int is_last; | |
4610 | ||
4611 | spin_lock_bh(&sess->conn_lock); | |
4612 | if (session_sleep) | |
4613 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4614 | ||
4615 | if (connection_sleep) { | |
4616 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4617 | conn_list) { | |
4618 | if (conn_count == 0) | |
4619 | break; | |
4620 | ||
4621 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4622 | is_last = 1; | |
4623 | } else { | |
4624 | iscsit_inc_conn_usage_count(conn_tmp); | |
4625 | is_last = 0; | |
4626 | } | |
4627 | iscsit_inc_conn_usage_count(conn); | |
4628 | ||
4629 | spin_unlock_bh(&sess->conn_lock); | |
4630 | iscsit_cause_connection_reinstatement(conn, 1); | |
4631 | spin_lock_bh(&sess->conn_lock); | |
4632 | ||
4633 | iscsit_dec_conn_usage_count(conn); | |
4634 | if (is_last == 0) | |
4635 | iscsit_dec_conn_usage_count(conn_tmp); | |
4636 | conn_count--; | |
4637 | } | |
4638 | } else { | |
4639 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4640 | iscsit_cause_connection_reinstatement(conn, 0); | |
4641 | } | |
4642 | ||
4643 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4644 | spin_unlock_bh(&sess->conn_lock); | |
4645 | wait_for_completion(&sess->session_wait_comp); | |
4646 | } else | |
4647 | spin_unlock_bh(&sess->conn_lock); | |
4648 | } | |
4649 | ||
4650 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4651 | { | |
4652 | struct iscsi_session *sess; | |
4653 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4654 | struct se_session *se_sess, *se_sess_tmp; | |
417c20a9 | 4655 | LIST_HEAD(free_list); |
e48354ce NB |
4656 | int session_count = 0; |
4657 | ||
4658 | spin_lock_bh(&se_tpg->session_lock); | |
4659 | if (tpg->nsessions && !force) { | |
4660 | spin_unlock_bh(&se_tpg->session_lock); | |
4661 | return -1; | |
4662 | } | |
4663 | ||
4664 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4665 | sess_list) { | |
4666 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4667 | ||
4668 | spin_lock(&sess->conn_lock); | |
4669 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4670 | atomic_read(&sess->session_logout) || | |
4671 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4672 | spin_unlock(&sess->conn_lock); | |
4673 | continue; | |
4674 | } | |
4675 | atomic_set(&sess->session_reinstatement, 1); | |
4676 | spin_unlock(&sess->conn_lock); | |
e48354ce | 4677 | |
417c20a9 NB |
4678 | list_move_tail(&se_sess->sess_list, &free_list); |
4679 | } | |
4680 | spin_unlock_bh(&se_tpg->session_lock); | |
e48354ce | 4681 | |
417c20a9 NB |
4682 | list_for_each_entry_safe(se_sess, se_sess_tmp, &free_list, sess_list) { |
4683 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4684 | ||
4685 | iscsit_free_session(sess); | |
e48354ce NB |
4686 | session_count++; |
4687 | } | |
e48354ce NB |
4688 | |
4689 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4690 | " Group: %hu\n", session_count, tpg->tpgt); | |
4691 | return 0; | |
4692 | } | |
4693 | ||
4694 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4695 | MODULE_VERSION("4.1.x"); | |
4696 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4697 | MODULE_LICENSE("GPL"); | |
4698 | ||
4699 | module_init(iscsi_target_init_module); | |
4700 | module_exit(iscsi_target_cleanup_module); |