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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains main functions related to the iSCSI Target Core Driver. | |
3 | * | |
4 | * \u00a9 Copyright 2007-2011 RisingTide Systems LLC. | |
5 | * | |
6 | * Licensed to the Linux Foundation under the General Public License (GPL) version 2. | |
7 | * | |
8 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | ******************************************************************************/ | |
20 | ||
21 | #include <linux/string.h> | |
22 | #include <linux/kthread.h> | |
23 | #include <linux/crypto.h> | |
24 | #include <linux/completion.h> | |
827509e3 | 25 | #include <linux/module.h> |
40401530 | 26 | #include <linux/idr.h> |
e48354ce NB |
27 | #include <asm/unaligned.h> |
28 | #include <scsi/scsi_device.h> | |
29 | #include <scsi/iscsi_proto.h> | |
d28b1169 | 30 | #include <scsi/scsi_tcq.h> |
e48354ce | 31 | #include <target/target_core_base.h> |
c4795fb2 | 32 | #include <target/target_core_fabric.h> |
d28b1169 | 33 | #include <target/target_core_configfs.h> |
e48354ce NB |
34 | |
35 | #include "iscsi_target_core.h" | |
36 | #include "iscsi_target_parameters.h" | |
37 | #include "iscsi_target_seq_pdu_list.h" | |
38 | #include "iscsi_target_tq.h" | |
39 | #include "iscsi_target_configfs.h" | |
40 | #include "iscsi_target_datain_values.h" | |
41 | #include "iscsi_target_erl0.h" | |
42 | #include "iscsi_target_erl1.h" | |
43 | #include "iscsi_target_erl2.h" | |
44 | #include "iscsi_target_login.h" | |
45 | #include "iscsi_target_tmr.h" | |
46 | #include "iscsi_target_tpg.h" | |
47 | #include "iscsi_target_util.h" | |
48 | #include "iscsi_target.h" | |
49 | #include "iscsi_target_device.h" | |
50 | #include "iscsi_target_stat.h" | |
51 | ||
baa4d64b NB |
52 | #include <target/iscsi/iscsi_transport.h> |
53 | ||
e48354ce NB |
54 | static LIST_HEAD(g_tiqn_list); |
55 | static LIST_HEAD(g_np_list); | |
56 | static DEFINE_SPINLOCK(tiqn_lock); | |
57 | static DEFINE_SPINLOCK(np_lock); | |
58 | ||
59 | static struct idr tiqn_idr; | |
60 | struct idr sess_idr; | |
61 | struct mutex auth_id_lock; | |
62 | spinlock_t sess_idr_lock; | |
63 | ||
64 | struct iscsit_global *iscsit_global; | |
65 | ||
66 | struct kmem_cache *lio_cmd_cache; | |
67 | struct kmem_cache *lio_qr_cache; | |
68 | struct kmem_cache *lio_dr_cache; | |
69 | struct kmem_cache *lio_ooo_cache; | |
70 | struct kmem_cache *lio_r2t_cache; | |
71 | ||
72 | static int iscsit_handle_immediate_data(struct iscsi_cmd *, | |
2ec5a8c1 | 73 | struct iscsi_scsi_req *, u32); |
e48354ce NB |
74 | |
75 | struct iscsi_tiqn *iscsit_get_tiqn_for_login(unsigned char *buf) | |
76 | { | |
77 | struct iscsi_tiqn *tiqn = NULL; | |
78 | ||
79 | spin_lock(&tiqn_lock); | |
80 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
81 | if (!strcmp(tiqn->tiqn, buf)) { | |
82 | ||
83 | spin_lock(&tiqn->tiqn_state_lock); | |
84 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
85 | tiqn->tiqn_access_count++; | |
86 | spin_unlock(&tiqn->tiqn_state_lock); | |
87 | spin_unlock(&tiqn_lock); | |
88 | return tiqn; | |
89 | } | |
90 | spin_unlock(&tiqn->tiqn_state_lock); | |
91 | } | |
92 | } | |
93 | spin_unlock(&tiqn_lock); | |
94 | ||
95 | return NULL; | |
96 | } | |
97 | ||
98 | static int iscsit_set_tiqn_shutdown(struct iscsi_tiqn *tiqn) | |
99 | { | |
100 | spin_lock(&tiqn->tiqn_state_lock); | |
101 | if (tiqn->tiqn_state == TIQN_STATE_ACTIVE) { | |
102 | tiqn->tiqn_state = TIQN_STATE_SHUTDOWN; | |
103 | spin_unlock(&tiqn->tiqn_state_lock); | |
104 | return 0; | |
105 | } | |
106 | spin_unlock(&tiqn->tiqn_state_lock); | |
107 | ||
108 | return -1; | |
109 | } | |
110 | ||
111 | void iscsit_put_tiqn_for_login(struct iscsi_tiqn *tiqn) | |
112 | { | |
113 | spin_lock(&tiqn->tiqn_state_lock); | |
114 | tiqn->tiqn_access_count--; | |
115 | spin_unlock(&tiqn->tiqn_state_lock); | |
116 | } | |
117 | ||
118 | /* | |
119 | * Note that IQN formatting is expected to be done in userspace, and | |
120 | * no explict IQN format checks are done here. | |
121 | */ | |
122 | struct iscsi_tiqn *iscsit_add_tiqn(unsigned char *buf) | |
123 | { | |
124 | struct iscsi_tiqn *tiqn = NULL; | |
125 | int ret; | |
126 | ||
8f50c7f5 | 127 | if (strlen(buf) >= ISCSI_IQN_LEN) { |
e48354ce NB |
128 | pr_err("Target IQN exceeds %d bytes\n", |
129 | ISCSI_IQN_LEN); | |
130 | return ERR_PTR(-EINVAL); | |
131 | } | |
132 | ||
133 | tiqn = kzalloc(sizeof(struct iscsi_tiqn), GFP_KERNEL); | |
134 | if (!tiqn) { | |
135 | pr_err("Unable to allocate struct iscsi_tiqn\n"); | |
136 | return ERR_PTR(-ENOMEM); | |
137 | } | |
138 | ||
139 | sprintf(tiqn->tiqn, "%s", buf); | |
140 | INIT_LIST_HEAD(&tiqn->tiqn_list); | |
141 | INIT_LIST_HEAD(&tiqn->tiqn_tpg_list); | |
142 | spin_lock_init(&tiqn->tiqn_state_lock); | |
143 | spin_lock_init(&tiqn->tiqn_tpg_lock); | |
144 | spin_lock_init(&tiqn->sess_err_stats.lock); | |
145 | spin_lock_init(&tiqn->login_stats.lock); | |
146 | spin_lock_init(&tiqn->logout_stats.lock); | |
147 | ||
e48354ce NB |
148 | tiqn->tiqn_state = TIQN_STATE_ACTIVE; |
149 | ||
c9365bd0 | 150 | idr_preload(GFP_KERNEL); |
e48354ce | 151 | spin_lock(&tiqn_lock); |
c9365bd0 TH |
152 | |
153 | ret = idr_alloc(&tiqn_idr, NULL, 0, 0, GFP_NOWAIT); | |
e48354ce | 154 | if (ret < 0) { |
c9365bd0 | 155 | pr_err("idr_alloc() failed for tiqn->tiqn_index\n"); |
e48354ce | 156 | spin_unlock(&tiqn_lock); |
c9365bd0 | 157 | idr_preload_end(); |
e48354ce NB |
158 | kfree(tiqn); |
159 | return ERR_PTR(ret); | |
160 | } | |
c9365bd0 | 161 | tiqn->tiqn_index = ret; |
e48354ce | 162 | list_add_tail(&tiqn->tiqn_list, &g_tiqn_list); |
c9365bd0 | 163 | |
e48354ce | 164 | spin_unlock(&tiqn_lock); |
c9365bd0 | 165 | idr_preload_end(); |
e48354ce NB |
166 | |
167 | pr_debug("CORE[0] - Added iSCSI Target IQN: %s\n", tiqn->tiqn); | |
168 | ||
169 | return tiqn; | |
170 | ||
171 | } | |
172 | ||
173 | static void iscsit_wait_for_tiqn(struct iscsi_tiqn *tiqn) | |
174 | { | |
175 | /* | |
176 | * Wait for accesses to said struct iscsi_tiqn to end. | |
177 | */ | |
178 | spin_lock(&tiqn->tiqn_state_lock); | |
179 | while (tiqn->tiqn_access_count != 0) { | |
180 | spin_unlock(&tiqn->tiqn_state_lock); | |
181 | msleep(10); | |
182 | spin_lock(&tiqn->tiqn_state_lock); | |
183 | } | |
184 | spin_unlock(&tiqn->tiqn_state_lock); | |
185 | } | |
186 | ||
187 | void iscsit_del_tiqn(struct iscsi_tiqn *tiqn) | |
188 | { | |
189 | /* | |
190 | * iscsit_set_tiqn_shutdown sets tiqn->tiqn_state = TIQN_STATE_SHUTDOWN | |
191 | * while holding tiqn->tiqn_state_lock. This means that all subsequent | |
192 | * attempts to access this struct iscsi_tiqn will fail from both transport | |
193 | * fabric and control code paths. | |
194 | */ | |
195 | if (iscsit_set_tiqn_shutdown(tiqn) < 0) { | |
196 | pr_err("iscsit_set_tiqn_shutdown() failed\n"); | |
197 | return; | |
198 | } | |
199 | ||
200 | iscsit_wait_for_tiqn(tiqn); | |
201 | ||
202 | spin_lock(&tiqn_lock); | |
203 | list_del(&tiqn->tiqn_list); | |
204 | idr_remove(&tiqn_idr, tiqn->tiqn_index); | |
205 | spin_unlock(&tiqn_lock); | |
206 | ||
207 | pr_debug("CORE[0] - Deleted iSCSI Target IQN: %s\n", | |
208 | tiqn->tiqn); | |
209 | kfree(tiqn); | |
210 | } | |
211 | ||
212 | int iscsit_access_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
213 | { | |
214 | int ret; | |
215 | /* | |
216 | * Determine if the network portal is accepting storage traffic. | |
217 | */ | |
218 | spin_lock_bh(&np->np_thread_lock); | |
219 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
220 | spin_unlock_bh(&np->np_thread_lock); | |
221 | return -1; | |
222 | } | |
223 | if (np->np_login_tpg) { | |
224 | pr_err("np->np_login_tpg() is not NULL!\n"); | |
225 | spin_unlock_bh(&np->np_thread_lock); | |
226 | return -1; | |
227 | } | |
228 | spin_unlock_bh(&np->np_thread_lock); | |
229 | /* | |
230 | * Determine if the portal group is accepting storage traffic. | |
231 | */ | |
232 | spin_lock_bh(&tpg->tpg_state_lock); | |
233 | if (tpg->tpg_state != TPG_STATE_ACTIVE) { | |
234 | spin_unlock_bh(&tpg->tpg_state_lock); | |
235 | return -1; | |
236 | } | |
237 | spin_unlock_bh(&tpg->tpg_state_lock); | |
238 | ||
239 | /* | |
240 | * Here we serialize access across the TIQN+TPG Tuple. | |
241 | */ | |
242 | ret = mutex_lock_interruptible(&tpg->np_login_lock); | |
243 | if ((ret != 0) || signal_pending(current)) | |
244 | return -1; | |
245 | ||
246 | spin_lock_bh(&np->np_thread_lock); | |
247 | np->np_login_tpg = tpg; | |
248 | spin_unlock_bh(&np->np_thread_lock); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | int iscsit_deaccess_np(struct iscsi_np *np, struct iscsi_portal_group *tpg) | |
254 | { | |
255 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
256 | ||
257 | spin_lock_bh(&np->np_thread_lock); | |
258 | np->np_login_tpg = NULL; | |
259 | spin_unlock_bh(&np->np_thread_lock); | |
260 | ||
261 | mutex_unlock(&tpg->np_login_lock); | |
262 | ||
263 | if (tiqn) | |
264 | iscsit_put_tiqn_for_login(tiqn); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
05b96892 | 269 | bool iscsit_check_np_match( |
e48354ce | 270 | struct __kernel_sockaddr_storage *sockaddr, |
05b96892 | 271 | struct iscsi_np *np, |
e48354ce NB |
272 | int network_transport) |
273 | { | |
274 | struct sockaddr_in *sock_in, *sock_in_e; | |
275 | struct sockaddr_in6 *sock_in6, *sock_in6_e; | |
05b96892 | 276 | bool ip_match = false; |
e48354ce NB |
277 | u16 port; |
278 | ||
05b96892 NB |
279 | if (sockaddr->ss_family == AF_INET6) { |
280 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
281 | sock_in6_e = (struct sockaddr_in6 *)&np->np_sockaddr; | |
282 | ||
283 | if (!memcmp(&sock_in6->sin6_addr.in6_u, | |
284 | &sock_in6_e->sin6_addr.in6_u, | |
285 | sizeof(struct in6_addr))) | |
286 | ip_match = true; | |
287 | ||
288 | port = ntohs(sock_in6->sin6_port); | |
289 | } else { | |
290 | sock_in = (struct sockaddr_in *)sockaddr; | |
291 | sock_in_e = (struct sockaddr_in *)&np->np_sockaddr; | |
292 | ||
293 | if (sock_in->sin_addr.s_addr == sock_in_e->sin_addr.s_addr) | |
294 | ip_match = true; | |
295 | ||
296 | port = ntohs(sock_in->sin_port); | |
297 | } | |
298 | ||
299 | if ((ip_match == true) && (np->np_port == port) && | |
300 | (np->np_network_transport == network_transport)) | |
301 | return true; | |
302 | ||
303 | return false; | |
304 | } | |
305 | ||
306 | static struct iscsi_np *iscsit_get_np( | |
307 | struct __kernel_sockaddr_storage *sockaddr, | |
308 | int network_transport) | |
309 | { | |
310 | struct iscsi_np *np; | |
311 | bool match; | |
312 | ||
e48354ce NB |
313 | spin_lock_bh(&np_lock); |
314 | list_for_each_entry(np, &g_np_list, np_list) { | |
315 | spin_lock(&np->np_thread_lock); | |
316 | if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) { | |
317 | spin_unlock(&np->np_thread_lock); | |
318 | continue; | |
319 | } | |
320 | ||
05b96892 NB |
321 | match = iscsit_check_np_match(sockaddr, np, network_transport); |
322 | if (match == true) { | |
e48354ce NB |
323 | /* |
324 | * Increment the np_exports reference count now to | |
325 | * prevent iscsit_del_np() below from being called | |
326 | * while iscsi_tpg_add_network_portal() is called. | |
327 | */ | |
328 | np->np_exports++; | |
329 | spin_unlock(&np->np_thread_lock); | |
330 | spin_unlock_bh(&np_lock); | |
331 | return np; | |
332 | } | |
333 | spin_unlock(&np->np_thread_lock); | |
334 | } | |
335 | spin_unlock_bh(&np_lock); | |
336 | ||
337 | return NULL; | |
338 | } | |
339 | ||
340 | struct iscsi_np *iscsit_add_np( | |
341 | struct __kernel_sockaddr_storage *sockaddr, | |
342 | char *ip_str, | |
343 | int network_transport) | |
344 | { | |
345 | struct sockaddr_in *sock_in; | |
346 | struct sockaddr_in6 *sock_in6; | |
347 | struct iscsi_np *np; | |
348 | int ret; | |
349 | /* | |
350 | * Locate the existing struct iscsi_np if already active.. | |
351 | */ | |
352 | np = iscsit_get_np(sockaddr, network_transport); | |
353 | if (np) | |
354 | return np; | |
355 | ||
356 | np = kzalloc(sizeof(struct iscsi_np), GFP_KERNEL); | |
357 | if (!np) { | |
358 | pr_err("Unable to allocate memory for struct iscsi_np\n"); | |
359 | return ERR_PTR(-ENOMEM); | |
360 | } | |
361 | ||
362 | np->np_flags |= NPF_IP_NETWORK; | |
363 | if (sockaddr->ss_family == AF_INET6) { | |
364 | sock_in6 = (struct sockaddr_in6 *)sockaddr; | |
365 | snprintf(np->np_ip, IPV6_ADDRESS_SPACE, "%s", ip_str); | |
366 | np->np_port = ntohs(sock_in6->sin6_port); | |
367 | } else { | |
368 | sock_in = (struct sockaddr_in *)sockaddr; | |
369 | sprintf(np->np_ip, "%s", ip_str); | |
370 | np->np_port = ntohs(sock_in->sin_port); | |
371 | } | |
372 | ||
373 | np->np_network_transport = network_transport; | |
374 | spin_lock_init(&np->np_thread_lock); | |
375 | init_completion(&np->np_restart_comp); | |
376 | INIT_LIST_HEAD(&np->np_list); | |
377 | ||
378 | ret = iscsi_target_setup_login_socket(np, sockaddr); | |
379 | if (ret != 0) { | |
380 | kfree(np); | |
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); | |
389 | return ERR_PTR(ret); | |
390 | } | |
391 | /* | |
392 | * Increment the np_exports reference count now to prevent | |
393 | * iscsit_del_np() below from being run while a new call to | |
394 | * iscsi_tpg_add_network_portal() for a matching iscsi_np is | |
395 | * active. We don't need to hold np->np_thread_lock at this | |
396 | * point because iscsi_np has not been added to g_np_list yet. | |
397 | */ | |
398 | np->np_exports = 1; | |
399 | ||
400 | spin_lock_bh(&np_lock); | |
401 | list_add_tail(&np->np_list, &g_np_list); | |
402 | spin_unlock_bh(&np_lock); | |
403 | ||
404 | pr_debug("CORE[0] - Added Network Portal: %s:%hu on %s\n", | |
baa4d64b | 405 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce NB |
406 | |
407 | return np; | |
408 | } | |
409 | ||
410 | int iscsit_reset_np_thread( | |
411 | struct iscsi_np *np, | |
412 | struct iscsi_tpg_np *tpg_np, | |
413 | struct iscsi_portal_group *tpg) | |
414 | { | |
415 | spin_lock_bh(&np->np_thread_lock); | |
416 | if (tpg && tpg_np) { | |
417 | /* | |
418 | * The reset operation need only be performed when the | |
419 | * passed struct iscsi_portal_group has a login in progress | |
420 | * to one of the network portals. | |
421 | */ | |
422 | if (tpg_np->tpg_np->np_login_tpg != tpg) { | |
423 | spin_unlock_bh(&np->np_thread_lock); | |
424 | return 0; | |
425 | } | |
426 | } | |
427 | if (np->np_thread_state == ISCSI_NP_THREAD_INACTIVE) { | |
428 | spin_unlock_bh(&np->np_thread_lock); | |
429 | return 0; | |
430 | } | |
431 | np->np_thread_state = ISCSI_NP_THREAD_RESET; | |
432 | ||
433 | if (np->np_thread) { | |
434 | spin_unlock_bh(&np->np_thread_lock); | |
435 | send_sig(SIGINT, np->np_thread, 1); | |
436 | wait_for_completion(&np->np_restart_comp); | |
437 | spin_lock_bh(&np->np_thread_lock); | |
438 | } | |
439 | spin_unlock_bh(&np->np_thread_lock); | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
baa4d64b | 444 | static void iscsit_free_np(struct iscsi_np *np) |
e48354ce | 445 | { |
bf6932f4 AV |
446 | if (np->np_socket) |
447 | sock_release(np->np_socket); | |
e48354ce NB |
448 | } |
449 | ||
450 | int iscsit_del_np(struct iscsi_np *np) | |
451 | { | |
452 | spin_lock_bh(&np->np_thread_lock); | |
453 | np->np_exports--; | |
454 | if (np->np_exports) { | |
455 | spin_unlock_bh(&np->np_thread_lock); | |
456 | return 0; | |
457 | } | |
458 | np->np_thread_state = ISCSI_NP_THREAD_SHUTDOWN; | |
459 | spin_unlock_bh(&np->np_thread_lock); | |
460 | ||
461 | if (np->np_thread) { | |
462 | /* | |
463 | * We need to send the signal to wakeup Linux/Net | |
464 | * which may be sleeping in sock_accept().. | |
465 | */ | |
466 | send_sig(SIGINT, np->np_thread, 1); | |
467 | kthread_stop(np->np_thread); | |
468 | } | |
baa4d64b NB |
469 | |
470 | np->np_transport->iscsit_free_np(np); | |
e48354ce NB |
471 | |
472 | spin_lock_bh(&np_lock); | |
473 | list_del(&np->np_list); | |
474 | spin_unlock_bh(&np_lock); | |
475 | ||
476 | pr_debug("CORE[0] - Removed Network Portal: %s:%hu on %s\n", | |
baa4d64b | 477 | np->np_ip, np->np_port, np->np_transport->name); |
e48354ce | 478 | |
baa4d64b | 479 | iscsit_put_transport(np->np_transport); |
e48354ce NB |
480 | kfree(np); |
481 | return 0; | |
482 | } | |
483 | ||
2ec5a8c1 NB |
484 | static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int); |
485 | static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int); | |
486 | ||
487 | static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd) | |
488 | { | |
489 | iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state); | |
490 | return 0; | |
491 | } | |
492 | ||
baa4d64b NB |
493 | static struct iscsit_transport iscsi_target_transport = { |
494 | .name = "iSCSI/TCP", | |
495 | .transport_type = ISCSI_TCP, | |
496 | .owner = NULL, | |
497 | .iscsit_setup_np = iscsit_setup_np, | |
498 | .iscsit_accept_np = iscsit_accept_np, | |
499 | .iscsit_free_np = iscsit_free_np, | |
cdb72665 | 500 | .iscsit_alloc_cmd = iscsit_alloc_cmd, |
baa4d64b NB |
501 | .iscsit_get_login_rx = iscsit_get_login_rx, |
502 | .iscsit_put_login_tx = iscsit_put_login_tx, | |
3e1c81a9 | 503 | .iscsit_get_dataout = iscsit_build_r2ts_for_cmd, |
2ec5a8c1 NB |
504 | .iscsit_immediate_queue = iscsit_immediate_queue, |
505 | .iscsit_response_queue = iscsit_response_queue, | |
506 | .iscsit_queue_data_in = iscsit_queue_rsp, | |
507 | .iscsit_queue_status = iscsit_queue_rsp, | |
baa4d64b NB |
508 | }; |
509 | ||
e48354ce NB |
510 | static int __init iscsi_target_init_module(void) |
511 | { | |
512 | int ret = 0; | |
513 | ||
514 | pr_debug("iSCSI-Target "ISCSIT_VERSION"\n"); | |
515 | ||
516 | iscsit_global = kzalloc(sizeof(struct iscsit_global), GFP_KERNEL); | |
517 | if (!iscsit_global) { | |
518 | pr_err("Unable to allocate memory for iscsit_global\n"); | |
519 | return -1; | |
520 | } | |
521 | mutex_init(&auth_id_lock); | |
522 | spin_lock_init(&sess_idr_lock); | |
523 | idr_init(&tiqn_idr); | |
524 | idr_init(&sess_idr); | |
525 | ||
526 | ret = iscsi_target_register_configfs(); | |
527 | if (ret < 0) | |
528 | goto out; | |
529 | ||
530 | ret = iscsi_thread_set_init(); | |
531 | if (ret < 0) | |
532 | goto configfs_out; | |
533 | ||
534 | if (iscsi_allocate_thread_sets(TARGET_THREAD_SET_COUNT) != | |
535 | TARGET_THREAD_SET_COUNT) { | |
536 | pr_err("iscsi_allocate_thread_sets() returned" | |
537 | " unexpected value!\n"); | |
538 | goto ts_out1; | |
539 | } | |
540 | ||
541 | lio_cmd_cache = kmem_cache_create("lio_cmd_cache", | |
542 | sizeof(struct iscsi_cmd), __alignof__(struct iscsi_cmd), | |
543 | 0, NULL); | |
544 | if (!lio_cmd_cache) { | |
545 | pr_err("Unable to kmem_cache_create() for" | |
546 | " lio_cmd_cache\n"); | |
547 | goto ts_out2; | |
548 | } | |
549 | ||
550 | lio_qr_cache = kmem_cache_create("lio_qr_cache", | |
551 | sizeof(struct iscsi_queue_req), | |
552 | __alignof__(struct iscsi_queue_req), 0, NULL); | |
553 | if (!lio_qr_cache) { | |
554 | pr_err("nable to kmem_cache_create() for" | |
555 | " lio_qr_cache\n"); | |
556 | goto cmd_out; | |
557 | } | |
558 | ||
559 | lio_dr_cache = kmem_cache_create("lio_dr_cache", | |
560 | sizeof(struct iscsi_datain_req), | |
561 | __alignof__(struct iscsi_datain_req), 0, NULL); | |
562 | if (!lio_dr_cache) { | |
563 | pr_err("Unable to kmem_cache_create() for" | |
564 | " lio_dr_cache\n"); | |
565 | goto qr_out; | |
566 | } | |
567 | ||
568 | lio_ooo_cache = kmem_cache_create("lio_ooo_cache", | |
569 | sizeof(struct iscsi_ooo_cmdsn), | |
570 | __alignof__(struct iscsi_ooo_cmdsn), 0, NULL); | |
571 | if (!lio_ooo_cache) { | |
572 | pr_err("Unable to kmem_cache_create() for" | |
573 | " lio_ooo_cache\n"); | |
574 | goto dr_out; | |
575 | } | |
576 | ||
577 | lio_r2t_cache = kmem_cache_create("lio_r2t_cache", | |
578 | sizeof(struct iscsi_r2t), __alignof__(struct iscsi_r2t), | |
579 | 0, NULL); | |
580 | if (!lio_r2t_cache) { | |
581 | pr_err("Unable to kmem_cache_create() for" | |
582 | " lio_r2t_cache\n"); | |
583 | goto ooo_out; | |
584 | } | |
585 | ||
baa4d64b NB |
586 | iscsit_register_transport(&iscsi_target_transport); |
587 | ||
e48354ce NB |
588 | if (iscsit_load_discovery_tpg() < 0) |
589 | goto r2t_out; | |
590 | ||
591 | return ret; | |
592 | r2t_out: | |
593 | kmem_cache_destroy(lio_r2t_cache); | |
594 | ooo_out: | |
595 | kmem_cache_destroy(lio_ooo_cache); | |
596 | dr_out: | |
597 | kmem_cache_destroy(lio_dr_cache); | |
598 | qr_out: | |
599 | kmem_cache_destroy(lio_qr_cache); | |
600 | cmd_out: | |
601 | kmem_cache_destroy(lio_cmd_cache); | |
602 | ts_out2: | |
603 | iscsi_deallocate_thread_sets(); | |
604 | ts_out1: | |
605 | iscsi_thread_set_free(); | |
606 | configfs_out: | |
607 | iscsi_target_deregister_configfs(); | |
608 | out: | |
609 | kfree(iscsit_global); | |
610 | return -ENOMEM; | |
611 | } | |
612 | ||
613 | static void __exit iscsi_target_cleanup_module(void) | |
614 | { | |
615 | iscsi_deallocate_thread_sets(); | |
616 | iscsi_thread_set_free(); | |
617 | iscsit_release_discovery_tpg(); | |
baa4d64b | 618 | iscsit_unregister_transport(&iscsi_target_transport); |
e48354ce NB |
619 | kmem_cache_destroy(lio_cmd_cache); |
620 | kmem_cache_destroy(lio_qr_cache); | |
621 | kmem_cache_destroy(lio_dr_cache); | |
622 | kmem_cache_destroy(lio_ooo_cache); | |
623 | kmem_cache_destroy(lio_r2t_cache); | |
624 | ||
625 | iscsi_target_deregister_configfs(); | |
626 | ||
627 | kfree(iscsit_global); | |
628 | } | |
629 | ||
8b1e1244 | 630 | static int iscsit_add_reject( |
e48354ce NB |
631 | u8 reason, |
632 | int fail_conn, | |
633 | unsigned char *buf, | |
634 | struct iscsi_conn *conn) | |
635 | { | |
636 | struct iscsi_cmd *cmd; | |
637 | struct iscsi_reject *hdr; | |
638 | int ret; | |
639 | ||
640 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
641 | if (!cmd) | |
642 | return -1; | |
643 | ||
644 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
645 | if (fail_conn) | |
646 | cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; | |
647 | ||
648 | hdr = (struct iscsi_reject *) cmd->pdu; | |
649 | hdr->reason = reason; | |
650 | ||
1c3d5794 | 651 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
652 | if (!cmd->buf_ptr) { |
653 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
654 | iscsit_release_cmd(cmd); | |
655 | return -1; | |
656 | } | |
e48354ce NB |
657 | |
658 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 659 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
660 | spin_unlock_bh(&conn->cmd_lock); |
661 | ||
662 | cmd->i_state = ISTATE_SEND_REJECT; | |
663 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
664 | ||
665 | ret = wait_for_completion_interruptible(&cmd->reject_comp); | |
666 | if (ret != 0) | |
667 | return -1; | |
668 | ||
669 | return (!fail_conn) ? 0 : -1; | |
670 | } | |
671 | ||
672 | int iscsit_add_reject_from_cmd( | |
673 | u8 reason, | |
674 | int fail_conn, | |
675 | int add_to_conn, | |
676 | unsigned char *buf, | |
677 | struct iscsi_cmd *cmd) | |
678 | { | |
679 | struct iscsi_conn *conn; | |
680 | struct iscsi_reject *hdr; | |
681 | int ret; | |
682 | ||
683 | if (!cmd->conn) { | |
684 | pr_err("cmd->conn is NULL for ITT: 0x%08x\n", | |
685 | cmd->init_task_tag); | |
686 | return -1; | |
687 | } | |
688 | conn = cmd->conn; | |
689 | ||
690 | cmd->iscsi_opcode = ISCSI_OP_REJECT; | |
691 | if (fail_conn) | |
692 | cmd->cmd_flags |= ICF_REJECT_FAIL_CONN; | |
693 | ||
694 | hdr = (struct iscsi_reject *) cmd->pdu; | |
695 | hdr->reason = reason; | |
696 | ||
1c3d5794 | 697 | cmd->buf_ptr = kmemdup(buf, ISCSI_HDR_LEN, GFP_KERNEL); |
e48354ce NB |
698 | if (!cmd->buf_ptr) { |
699 | pr_err("Unable to allocate memory for cmd->buf_ptr\n"); | |
700 | iscsit_release_cmd(cmd); | |
701 | return -1; | |
702 | } | |
e48354ce NB |
703 | |
704 | if (add_to_conn) { | |
705 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 706 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
707 | spin_unlock_bh(&conn->cmd_lock); |
708 | } | |
709 | ||
710 | cmd->i_state = ISTATE_SEND_REJECT; | |
711 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
712 | ||
713 | ret = wait_for_completion_interruptible(&cmd->reject_comp); | |
3e1c81a9 NB |
714 | /* |
715 | * Perform the kref_put now if se_cmd has already been setup by | |
716 | * scsit_setup_scsi_cmd() | |
717 | */ | |
718 | if (cmd->se_cmd.se_tfo != NULL) { | |
719 | pr_debug("iscsi reject: calling target_put_sess_cmd >>>>>>\n"); | |
720 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
721 | } | |
e48354ce NB |
722 | if (ret != 0) |
723 | return -1; | |
724 | ||
725 | return (!fail_conn) ? 0 : -1; | |
726 | } | |
3e1c81a9 | 727 | EXPORT_SYMBOL(iscsit_add_reject_from_cmd); |
e48354ce NB |
728 | |
729 | /* | |
730 | * Map some portion of the allocated scatterlist to an iovec, suitable for | |
bfb79eac | 731 | * kernel sockets to copy data in/out. |
e48354ce NB |
732 | */ |
733 | static int iscsit_map_iovec( | |
734 | struct iscsi_cmd *cmd, | |
735 | struct kvec *iov, | |
736 | u32 data_offset, | |
737 | u32 data_length) | |
738 | { | |
739 | u32 i = 0; | |
740 | struct scatterlist *sg; | |
741 | unsigned int page_off; | |
742 | ||
743 | /* | |
bfb79eac | 744 | * We know each entry in t_data_sg contains a page. |
e48354ce | 745 | */ |
bfb79eac | 746 | sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE]; |
e48354ce NB |
747 | page_off = (data_offset % PAGE_SIZE); |
748 | ||
749 | cmd->first_data_sg = sg; | |
750 | cmd->first_data_sg_off = page_off; | |
751 | ||
752 | while (data_length) { | |
753 | u32 cur_len = min_t(u32, data_length, sg->length - page_off); | |
754 | ||
755 | iov[i].iov_base = kmap(sg_page(sg)) + sg->offset + page_off; | |
756 | iov[i].iov_len = cur_len; | |
757 | ||
758 | data_length -= cur_len; | |
759 | page_off = 0; | |
760 | sg = sg_next(sg); | |
761 | i++; | |
762 | } | |
763 | ||
764 | cmd->kmapped_nents = i; | |
765 | ||
766 | return i; | |
767 | } | |
768 | ||
769 | static void iscsit_unmap_iovec(struct iscsi_cmd *cmd) | |
770 | { | |
771 | u32 i; | |
772 | struct scatterlist *sg; | |
773 | ||
774 | sg = cmd->first_data_sg; | |
775 | ||
776 | for (i = 0; i < cmd->kmapped_nents; i++) | |
777 | kunmap(sg_page(&sg[i])); | |
778 | } | |
779 | ||
780 | static void iscsit_ack_from_expstatsn(struct iscsi_conn *conn, u32 exp_statsn) | |
781 | { | |
782 | struct iscsi_cmd *cmd; | |
783 | ||
784 | conn->exp_statsn = exp_statsn; | |
785 | ||
3e1c81a9 NB |
786 | if (conn->sess->sess_ops->RDMAExtensions) |
787 | return; | |
788 | ||
e48354ce | 789 | spin_lock_bh(&conn->cmd_lock); |
2fbb471e | 790 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
791 | spin_lock(&cmd->istate_lock); |
792 | if ((cmd->i_state == ISTATE_SENT_STATUS) && | |
64c13330 | 793 | iscsi_sna_lt(cmd->stat_sn, exp_statsn)) { |
e48354ce NB |
794 | cmd->i_state = ISTATE_REMOVE; |
795 | spin_unlock(&cmd->istate_lock); | |
796 | iscsit_add_cmd_to_immediate_queue(cmd, conn, | |
797 | cmd->i_state); | |
798 | continue; | |
799 | } | |
800 | spin_unlock(&cmd->istate_lock); | |
801 | } | |
802 | spin_unlock_bh(&conn->cmd_lock); | |
803 | } | |
804 | ||
805 | static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd) | |
806 | { | |
f80e8ed3 | 807 | u32 iov_count = max(1UL, DIV_ROUND_UP(cmd->se_cmd.data_length, PAGE_SIZE)); |
e48354ce | 808 | |
c0427f15 | 809 | iov_count += ISCSI_IOV_DATA_BUFFER; |
e48354ce NB |
810 | |
811 | cmd->iov_data = kzalloc(iov_count * sizeof(struct kvec), GFP_KERNEL); | |
812 | if (!cmd->iov_data) { | |
813 | pr_err("Unable to allocate cmd->iov_data\n"); | |
814 | return -ENOMEM; | |
815 | } | |
816 | ||
817 | cmd->orig_iov_data_count = iov_count; | |
818 | return 0; | |
819 | } | |
820 | ||
3e1c81a9 NB |
821 | int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
822 | unsigned char *buf) | |
e48354ce | 823 | { |
3e1c81a9 | 824 | int data_direction, payload_length; |
e48354ce | 825 | struct iscsi_scsi_req *hdr; |
d28b1169 AG |
826 | int iscsi_task_attr; |
827 | int sam_task_attr; | |
e48354ce NB |
828 | |
829 | spin_lock_bh(&conn->sess->session_stats_lock); | |
830 | conn->sess->cmd_pdus++; | |
831 | if (conn->sess->se_sess->se_node_acl) { | |
832 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
833 | conn->sess->se_sess->se_node_acl->num_cmds++; | |
834 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
835 | } | |
836 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
837 | ||
838 | hdr = (struct iscsi_scsi_req *) buf; | |
839 | payload_length = ntoh24(hdr->dlength); | |
e48354ce NB |
840 | |
841 | /* FIXME; Add checks for AdditionalHeaderSegment */ | |
842 | ||
843 | if (!(hdr->flags & ISCSI_FLAG_CMD_WRITE) && | |
844 | !(hdr->flags & ISCSI_FLAG_CMD_FINAL)) { | |
845 | pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL" | |
846 | " not set. Bad iSCSI Initiator.\n"); | |
3e1c81a9 NB |
847 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
848 | 1, 1, buf, cmd); | |
e48354ce NB |
849 | } |
850 | ||
851 | if (((hdr->flags & ISCSI_FLAG_CMD_READ) || | |
852 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) && !hdr->data_length) { | |
853 | /* | |
854 | * Vmware ESX v3.0 uses a modified Cisco Initiator (v3.4.2) | |
855 | * that adds support for RESERVE/RELEASE. There is a bug | |
856 | * add with this new functionality that sets R/W bits when | |
857 | * neither CDB carries any READ or WRITE datapayloads. | |
858 | */ | |
859 | if ((hdr->cdb[0] == 0x16) || (hdr->cdb[0] == 0x17)) { | |
860 | hdr->flags &= ~ISCSI_FLAG_CMD_READ; | |
861 | hdr->flags &= ~ISCSI_FLAG_CMD_WRITE; | |
862 | goto done; | |
863 | } | |
864 | ||
865 | pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE" | |
866 | " set when Expected Data Transfer Length is 0 for" | |
867 | " CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]); | |
3e1c81a9 NB |
868 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
869 | 1, 1, buf, cmd); | |
e48354ce NB |
870 | } |
871 | done: | |
872 | ||
873 | if (!(hdr->flags & ISCSI_FLAG_CMD_READ) && | |
874 | !(hdr->flags & ISCSI_FLAG_CMD_WRITE) && (hdr->data_length != 0)) { | |
875 | pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE" | |
876 | " MUST be set if Expected Data Transfer Length is not 0." | |
877 | " Bad iSCSI Initiator\n"); | |
3e1c81a9 NB |
878 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
879 | 1, 1, buf, cmd); | |
e48354ce NB |
880 | } |
881 | ||
882 | if ((hdr->flags & ISCSI_FLAG_CMD_READ) && | |
883 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) { | |
884 | pr_err("Bidirectional operations not supported!\n"); | |
3e1c81a9 NB |
885 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
886 | 1, 1, buf, cmd); | |
e48354ce NB |
887 | } |
888 | ||
889 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
890 | pr_err("Illegally set Immediate Bit in iSCSI Initiator" | |
891 | " Scsi Command PDU.\n"); | |
3e1c81a9 NB |
892 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
893 | 1, 1, buf, cmd); | |
e48354ce NB |
894 | } |
895 | ||
896 | if (payload_length && !conn->sess->sess_ops->ImmediateData) { | |
897 | pr_err("ImmediateData=No but DataSegmentLength=%u," | |
898 | " protocol error.\n", payload_length); | |
3e1c81a9 NB |
899 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, |
900 | 1, 1, buf, cmd); | |
e48354ce NB |
901 | } |
902 | ||
50e5c87d | 903 | if ((be32_to_cpu(hdr->data_length )== payload_length) && |
e48354ce NB |
904 | (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))) { |
905 | pr_err("Expected Data Transfer Length and Length of" | |
906 | " Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL" | |
907 | " bit is not set protocol error\n"); | |
3e1c81a9 NB |
908 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, |
909 | 1, 1, buf, cmd); | |
e48354ce NB |
910 | } |
911 | ||
50e5c87d | 912 | if (payload_length > be32_to_cpu(hdr->data_length)) { |
e48354ce NB |
913 | pr_err("DataSegmentLength: %u is greater than" |
914 | " EDTL: %u, protocol error.\n", payload_length, | |
915 | hdr->data_length); | |
3e1c81a9 NB |
916 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, |
917 | 1, 1, buf, cmd); | |
e48354ce NB |
918 | } |
919 | ||
21f5aa7e | 920 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 921 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
922 | " MaxXmitDataSegmentLength: %u, protocol error.\n", |
923 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
3e1c81a9 NB |
924 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, |
925 | 1, 1, buf, cmd); | |
e48354ce NB |
926 | } |
927 | ||
928 | if (payload_length > conn->sess->sess_ops->FirstBurstLength) { | |
929 | pr_err("DataSegmentLength: %u is greater than" | |
930 | " FirstBurstLength: %u, protocol error.\n", | |
931 | payload_length, conn->sess->sess_ops->FirstBurstLength); | |
3e1c81a9 NB |
932 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
933 | 1, 1, buf, cmd); | |
e48354ce NB |
934 | } |
935 | ||
936 | data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE : | |
937 | (hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE : | |
938 | DMA_NONE; | |
939 | ||
d28b1169 | 940 | cmd->data_direction = data_direction; |
d28b1169 AG |
941 | iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK; |
942 | /* | |
943 | * Figure out the SAM Task Attribute for the incoming SCSI CDB | |
944 | */ | |
945 | if ((iscsi_task_attr == ISCSI_ATTR_UNTAGGED) || | |
946 | (iscsi_task_attr == ISCSI_ATTR_SIMPLE)) | |
947 | sam_task_attr = MSG_SIMPLE_TAG; | |
948 | else if (iscsi_task_attr == ISCSI_ATTR_ORDERED) | |
949 | sam_task_attr = MSG_ORDERED_TAG; | |
950 | else if (iscsi_task_attr == ISCSI_ATTR_HEAD_OF_QUEUE) | |
951 | sam_task_attr = MSG_HEAD_TAG; | |
952 | else if (iscsi_task_attr == ISCSI_ATTR_ACA) | |
953 | sam_task_attr = MSG_ACA_TAG; | |
954 | else { | |
955 | pr_debug("Unknown iSCSI Task Attribute: 0x%02x, using" | |
956 | " MSG_SIMPLE_TAG\n", iscsi_task_attr); | |
957 | sam_task_attr = MSG_SIMPLE_TAG; | |
958 | } | |
959 | ||
e48354ce NB |
960 | cmd->iscsi_opcode = ISCSI_OP_SCSI_CMD; |
961 | cmd->i_state = ISTATE_NEW_CMD; | |
962 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
963 | cmd->immediate_data = (payload_length) ? 1 : 0; | |
964 | cmd->unsolicited_data = ((!(hdr->flags & ISCSI_FLAG_CMD_FINAL) && | |
965 | (hdr->flags & ISCSI_FLAG_CMD_WRITE)) ? 1 : 0); | |
966 | if (cmd->unsolicited_data) | |
967 | cmd->cmd_flags |= ICF_NON_IMMEDIATE_UNSOLICITED_DATA; | |
968 | ||
969 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
970 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { | |
971 | spin_lock_bh(&conn->sess->ttt_lock); | |
972 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
973 | if (cmd->targ_xfer_tag == 0xFFFFFFFF) | |
974 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
975 | spin_unlock_bh(&conn->sess->ttt_lock); | |
976 | } else if (hdr->flags & ISCSI_FLAG_CMD_WRITE) | |
977 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
978 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
979 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
980 | cmd->first_burst_len = payload_length; |
981 | ||
3e1c81a9 NB |
982 | if (!conn->sess->sess_ops->RDMAExtensions && |
983 | cmd->data_direction == DMA_FROM_DEVICE) { | |
e48354ce NB |
984 | struct iscsi_datain_req *dr; |
985 | ||
986 | dr = iscsit_allocate_datain_req(); | |
987 | if (!dr) | |
988 | return iscsit_add_reject_from_cmd( | |
989 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
990 | 1, 1, buf, cmd); | |
991 | ||
992 | iscsit_attach_datain_req(cmd, dr); | |
993 | } | |
994 | ||
065ca1e4 AG |
995 | /* |
996 | * Initialize struct se_cmd descriptor from target_core_mod infrastructure | |
997 | */ | |
998 | transport_init_se_cmd(&cmd->se_cmd, &lio_target_fabric_configfs->tf_ops, | |
50e5c87d CH |
999 | conn->sess->se_sess, be32_to_cpu(hdr->data_length), |
1000 | cmd->data_direction, sam_task_attr, | |
1001 | cmd->sense_buffer + 2); | |
065ca1e4 AG |
1002 | |
1003 | pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x," | |
1004 | " ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt, | |
3e1c81a9 NB |
1005 | hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length, |
1006 | conn->cid); | |
1007 | ||
1008 | target_get_sess_cmd(conn->sess->se_sess, &cmd->se_cmd, true); | |
065ca1e4 | 1009 | |
de103c93 CH |
1010 | cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd, |
1011 | scsilun_to_int(&hdr->lun)); | |
1012 | if (cmd->sense_reason) | |
1013 | goto attach_cmd; | |
1014 | ||
1015 | cmd->sense_reason = target_setup_cmd_from_cdb(&cmd->se_cmd, hdr->cdb); | |
1016 | if (cmd->sense_reason) { | |
1017 | if (cmd->sense_reason == TCM_OUT_OF_RESOURCES) { | |
1018 | return iscsit_add_reject_from_cmd( | |
1019 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1020 | 1, 1, buf, cmd); | |
e48354ce | 1021 | } |
de103c93 | 1022 | |
e48354ce NB |
1023 | goto attach_cmd; |
1024 | } | |
a12f41f8 | 1025 | |
de103c93 | 1026 | if (iscsit_build_pdu_and_seq_lists(cmd, payload_length) < 0) { |
e48354ce | 1027 | return iscsit_add_reject_from_cmd( |
de103c93 CH |
1028 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, |
1029 | 1, 1, buf, cmd); | |
e48354ce NB |
1030 | } |
1031 | ||
1032 | attach_cmd: | |
1033 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1034 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1035 | spin_unlock_bh(&conn->cmd_lock); |
1036 | /* | |
1037 | * Check if we need to delay processing because of ALUA | |
1038 | * Active/NonOptimized primary access state.. | |
1039 | */ | |
1040 | core_alua_check_nonop_delay(&cmd->se_cmd); | |
bfb79eac | 1041 | |
3e1c81a9 NB |
1042 | return 0; |
1043 | } | |
1044 | EXPORT_SYMBOL(iscsit_setup_scsi_cmd); | |
de103c93 | 1045 | |
3e1c81a9 NB |
1046 | void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd) |
1047 | { | |
1048 | iscsit_set_dataout_sequence_values(cmd); | |
1049 | ||
1050 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
1051 | iscsit_start_dataout_timer(cmd, cmd->conn); | |
1052 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
1053 | } | |
1054 | EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout); | |
1055 | ||
1056 | int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1057 | struct iscsi_scsi_req *hdr) | |
1058 | { | |
1059 | int cmdsn_ret = 0; | |
e48354ce NB |
1060 | /* |
1061 | * Check the CmdSN against ExpCmdSN/MaxCmdSN here if | |
1062 | * the Immediate Bit is not set, and no Immediate | |
1063 | * Data is attached. | |
1064 | * | |
1065 | * A PDU/CmdSN carrying Immediate Data can only | |
1066 | * be processed after the DataCRC has passed. | |
1067 | * If the DataCRC fails, the CmdSN MUST NOT | |
1068 | * be acknowledged. (See below) | |
1069 | */ | |
1070 | if (!cmd->immediate_data) { | |
1071 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
3e1c81a9 NB |
1072 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { |
1073 | if (!cmd->sense_reason) | |
1074 | return 0; | |
1075 | ||
1076 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); | |
7e32da55 | 1077 | return 0; |
3e1c81a9 | 1078 | } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { |
e48354ce NB |
1079 | return iscsit_add_reject_from_cmd( |
1080 | ISCSI_REASON_PROTOCOL_ERROR, | |
3e1c81a9 NB |
1081 | 1, 0, (unsigned char *)hdr, cmd); |
1082 | } | |
e48354ce NB |
1083 | } |
1084 | ||
50e5c87d | 1085 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1086 | |
1087 | /* | |
1088 | * If no Immediate Data is attached, it's OK to return now. | |
1089 | */ | |
1090 | if (!cmd->immediate_data) { | |
3e1c81a9 NB |
1091 | if (!cmd->sense_reason && cmd->unsolicited_data) |
1092 | iscsit_set_unsoliticed_dataout(cmd); | |
1093 | if (!cmd->sense_reason) | |
1094 | return 0; | |
e48354ce | 1095 | |
3e1c81a9 | 1096 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
e48354ce NB |
1097 | return 0; |
1098 | } | |
1099 | ||
1100 | /* | |
3e1c81a9 NB |
1101 | * Early CHECK_CONDITIONs with ImmediateData never make it to command |
1102 | * execution. These exceptions are processed in CmdSN order using | |
1103 | * iscsit_check_received_cmdsn() in iscsit_get_immediate_data() below. | |
e48354ce | 1104 | */ |
de103c93 | 1105 | if (cmd->sense_reason) { |
3e1c81a9 NB |
1106 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
1107 | return 1; | |
e48354ce NB |
1108 | } |
1109 | /* | |
1110 | * Call directly into transport_generic_new_cmd() to perform | |
1111 | * the backend memory allocation. | |
1112 | */ | |
de103c93 CH |
1113 | cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd); |
1114 | if (cmd->sense_reason) { | |
3e1c81a9 NB |
1115 | target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); |
1116 | return 1; | |
e48354ce NB |
1117 | } |
1118 | ||
3e1c81a9 NB |
1119 | return 0; |
1120 | } | |
1121 | EXPORT_SYMBOL(iscsit_process_scsi_cmd); | |
1122 | ||
1123 | static int | |
1124 | iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr, | |
1125 | bool dump_payload) | |
1126 | { | |
1127 | int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION; | |
1128 | /* | |
1129 | * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes. | |
1130 | */ | |
1131 | if (dump_payload == true) | |
1132 | goto after_immediate_data; | |
1133 | ||
1134 | immed_ret = iscsit_handle_immediate_data(cmd, hdr, | |
1135 | cmd->first_burst_len); | |
e48354ce NB |
1136 | after_immediate_data: |
1137 | if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) { | |
1138 | /* | |
1139 | * A PDU/CmdSN carrying Immediate Data passed | |
1140 | * DataCRC, check against ExpCmdSN/MaxCmdSN if | |
1141 | * Immediate Bit is not set. | |
1142 | */ | |
3e1c81a9 NB |
1143 | cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, hdr->cmdsn); |
1144 | ||
de103c93 | 1145 | if (cmd->sense_reason) { |
3e1c81a9 NB |
1146 | if (iscsit_dump_data_payload(cmd->conn, |
1147 | cmd->first_burst_len, 1) < 0) | |
e48354ce | 1148 | return -1; |
3e1c81a9 NB |
1149 | } else if (cmd->unsolicited_data) |
1150 | iscsit_set_unsoliticed_dataout(cmd); | |
e48354ce NB |
1151 | |
1152 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1153 | return iscsit_add_reject_from_cmd( | |
1154 | ISCSI_REASON_PROTOCOL_ERROR, | |
3e1c81a9 | 1155 | 1, 0, (unsigned char *)hdr, cmd); |
e48354ce NB |
1156 | |
1157 | } else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) { | |
1158 | /* | |
1159 | * Immediate Data failed DataCRC and ERL>=1, | |
1160 | * silently drop this PDU and let the initiator | |
1161 | * plug the CmdSN gap. | |
1162 | * | |
1163 | * FIXME: Send Unsolicited NOPIN with reserved | |
1164 | * TTT here to help the initiator figure out | |
1165 | * the missing CmdSN, although they should be | |
1166 | * intelligent enough to determine the missing | |
1167 | * CmdSN and issue a retry to plug the sequence. | |
1168 | */ | |
1169 | cmd->i_state = ISTATE_REMOVE; | |
3e1c81a9 | 1170 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state); |
e48354ce NB |
1171 | } else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */ |
1172 | return -1; | |
1173 | ||
1174 | return 0; | |
1175 | } | |
1176 | ||
3e1c81a9 NB |
1177 | static int |
1178 | iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1179 | unsigned char *buf) | |
1180 | { | |
1181 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; | |
1182 | int rc, immed_data; | |
1183 | bool dump_payload = false; | |
1184 | ||
1185 | rc = iscsit_setup_scsi_cmd(conn, cmd, buf); | |
1186 | if (rc < 0) | |
1187 | return rc; | |
1188 | /* | |
1189 | * Allocation iovecs needed for struct socket operations for | |
1190 | * traditional iSCSI block I/O. | |
1191 | */ | |
1192 | if (iscsit_allocate_iovecs(cmd) < 0) { | |
1193 | return iscsit_add_reject_from_cmd( | |
1194 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1195 | 1, 0, buf, cmd); | |
1196 | } | |
1197 | immed_data = cmd->immediate_data; | |
1198 | ||
1199 | rc = iscsit_process_scsi_cmd(conn, cmd, hdr); | |
1200 | if (rc < 0) | |
1201 | return rc; | |
1202 | else if (rc > 0) | |
1203 | dump_payload = true; | |
1204 | ||
1205 | if (!immed_data) | |
1206 | return 0; | |
1207 | ||
1208 | return iscsit_get_immediate_data(cmd, hdr, dump_payload); | |
1209 | } | |
1210 | ||
e48354ce NB |
1211 | static u32 iscsit_do_crypto_hash_sg( |
1212 | struct hash_desc *hash, | |
1213 | struct iscsi_cmd *cmd, | |
1214 | u32 data_offset, | |
1215 | u32 data_length, | |
1216 | u32 padding, | |
1217 | u8 *pad_bytes) | |
1218 | { | |
1219 | u32 data_crc; | |
1220 | u32 i; | |
1221 | struct scatterlist *sg; | |
1222 | unsigned int page_off; | |
1223 | ||
1224 | crypto_hash_init(hash); | |
1225 | ||
1226 | sg = cmd->first_data_sg; | |
1227 | page_off = cmd->first_data_sg_off; | |
1228 | ||
1229 | i = 0; | |
1230 | while (data_length) { | |
1231 | u32 cur_len = min_t(u32, data_length, (sg[i].length - page_off)); | |
1232 | ||
1233 | crypto_hash_update(hash, &sg[i], cur_len); | |
1234 | ||
1235 | data_length -= cur_len; | |
1236 | page_off = 0; | |
1237 | i++; | |
1238 | } | |
1239 | ||
1240 | if (padding) { | |
1241 | struct scatterlist pad_sg; | |
1242 | ||
1243 | sg_init_one(&pad_sg, pad_bytes, padding); | |
1244 | crypto_hash_update(hash, &pad_sg, padding); | |
1245 | } | |
1246 | crypto_hash_final(hash, (u8 *) &data_crc); | |
1247 | ||
1248 | return data_crc; | |
1249 | } | |
1250 | ||
1251 | static void iscsit_do_crypto_hash_buf( | |
1252 | struct hash_desc *hash, | |
1253 | unsigned char *buf, | |
1254 | u32 payload_length, | |
1255 | u32 padding, | |
1256 | u8 *pad_bytes, | |
1257 | u8 *data_crc) | |
1258 | { | |
1259 | struct scatterlist sg; | |
1260 | ||
1261 | crypto_hash_init(hash); | |
1262 | ||
8359cf43 | 1263 | sg_init_one(&sg, buf, payload_length); |
e48354ce NB |
1264 | crypto_hash_update(hash, &sg, payload_length); |
1265 | ||
1266 | if (padding) { | |
1267 | sg_init_one(&sg, pad_bytes, padding); | |
1268 | crypto_hash_update(hash, &sg, padding); | |
1269 | } | |
1270 | crypto_hash_final(hash, data_crc); | |
1271 | } | |
1272 | ||
3e1c81a9 NB |
1273 | int |
1274 | iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf, | |
1275 | struct iscsi_cmd **out_cmd) | |
e48354ce | 1276 | { |
3e1c81a9 | 1277 | struct iscsi_data *hdr = (struct iscsi_data *)buf; |
e48354ce NB |
1278 | struct iscsi_cmd *cmd = NULL; |
1279 | struct se_cmd *se_cmd; | |
e48354ce | 1280 | unsigned long flags; |
3e1c81a9 NB |
1281 | u32 payload_length = ntoh24(hdr->dlength); |
1282 | int rc; | |
e48354ce NB |
1283 | |
1284 | if (!payload_length) { | |
1285 | pr_err("DataOUT payload is ZERO, protocol error.\n"); | |
1286 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1287 | buf, conn); | |
1288 | } | |
1289 | ||
1290 | /* iSCSI write */ | |
1291 | spin_lock_bh(&conn->sess->session_stats_lock); | |
1292 | conn->sess->rx_data_octets += payload_length; | |
1293 | if (conn->sess->se_sess->se_node_acl) { | |
1294 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
1295 | conn->sess->se_sess->se_node_acl->write_bytes += payload_length; | |
1296 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
1297 | } | |
1298 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
1299 | ||
21f5aa7e | 1300 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1301 | pr_err("DataSegmentLength: %u is greater than" |
21f5aa7e NB |
1302 | " MaxXmitDataSegmentLength: %u\n", payload_length, |
1303 | conn->conn_ops->MaxXmitDataSegmentLength); | |
e48354ce NB |
1304 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
1305 | buf, conn); | |
1306 | } | |
1307 | ||
1308 | cmd = iscsit_find_cmd_from_itt_or_dump(conn, hdr->itt, | |
1309 | payload_length); | |
1310 | if (!cmd) | |
1311 | return 0; | |
1312 | ||
1313 | pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x," | |
1314 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
3e1c81a9 | 1315 | hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset), |
e48354ce NB |
1316 | payload_length, conn->cid); |
1317 | ||
1318 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) { | |
1319 | pr_err("Command ITT: 0x%08x received DataOUT after" | |
1320 | " last DataOUT received, dumping payload\n", | |
1321 | cmd->init_task_tag); | |
1322 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1323 | } | |
1324 | ||
1325 | if (cmd->data_direction != DMA_TO_DEVICE) { | |
1326 | pr_err("Command ITT: 0x%08x received DataOUT for a" | |
1327 | " NON-WRITE command.\n", cmd->init_task_tag); | |
1328 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, | |
1329 | 1, 0, buf, cmd); | |
1330 | } | |
1331 | se_cmd = &cmd->se_cmd; | |
1332 | iscsit_mod_dataout_timer(cmd); | |
1333 | ||
50e5c87d | 1334 | if ((be32_to_cpu(hdr->offset) + payload_length) > cmd->se_cmd.data_length) { |
e48354ce NB |
1335 | pr_err("DataOut Offset: %u, Length %u greater than" |
1336 | " iSCSI Command EDTL %u, protocol error.\n", | |
ebf1d95c | 1337 | hdr->offset, payload_length, cmd->se_cmd.data_length); |
e48354ce NB |
1338 | return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID, |
1339 | 1, 0, buf, cmd); | |
1340 | } | |
1341 | ||
1342 | if (cmd->unsolicited_data) { | |
1343 | int dump_unsolicited_data = 0; | |
1344 | ||
1345 | if (conn->sess->sess_ops->InitialR2T) { | |
1346 | pr_err("Received unexpected unsolicited data" | |
1347 | " while InitialR2T=Yes, protocol error.\n"); | |
1348 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
1349 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
1350 | return -1; | |
1351 | } | |
1352 | /* | |
1353 | * Special case for dealing with Unsolicited DataOUT | |
1354 | * and Unsupported SAM WRITE Opcodes and SE resource allocation | |
1355 | * failures; | |
1356 | */ | |
1357 | ||
1358 | /* Something's amiss if we're not in WRITE_PENDING state... */ | |
1359 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); | |
1360 | WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING); | |
1361 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); | |
1362 | ||
1363 | spin_lock_irqsave(&se_cmd->t_state_lock, flags); | |
de103c93 | 1364 | if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE)) |
e48354ce NB |
1365 | dump_unsolicited_data = 1; |
1366 | spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); | |
1367 | ||
1368 | if (dump_unsolicited_data) { | |
1369 | /* | |
1370 | * Check if a delayed TASK_ABORTED status needs to | |
1371 | * be sent now if the ISCSI_FLAG_CMD_FINAL has been | |
1372 | * received with the unsolicitied data out. | |
1373 | */ | |
1374 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) | |
1375 | iscsit_stop_dataout_timer(cmd); | |
1376 | ||
1377 | transport_check_aborted_status(se_cmd, | |
1378 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
1379 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1380 | } | |
1381 | } else { | |
1382 | /* | |
1383 | * For the normal solicited data path: | |
1384 | * | |
1385 | * Check for a delayed TASK_ABORTED status and dump any | |
1386 | * incoming data out payload if one exists. Also, when the | |
1387 | * ISCSI_FLAG_CMD_FINAL is set to denote the end of the current | |
1388 | * data out sequence, we decrement outstanding_r2ts. Once | |
1389 | * outstanding_r2ts reaches zero, go ahead and send the delayed | |
1390 | * TASK_ABORTED status. | |
1391 | */ | |
7d680f3b | 1392 | if (se_cmd->transport_state & CMD_T_ABORTED) { |
e48354ce NB |
1393 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) |
1394 | if (--cmd->outstanding_r2ts < 1) { | |
1395 | iscsit_stop_dataout_timer(cmd); | |
1396 | transport_check_aborted_status( | |
1397 | se_cmd, 1); | |
1398 | } | |
1399 | ||
1400 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
1401 | } | |
1402 | } | |
1403 | /* | |
1404 | * Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and | |
1405 | * within-command recovery checks before receiving the payload. | |
1406 | */ | |
3e1c81a9 NB |
1407 | rc = iscsit_check_pre_dataout(cmd, buf); |
1408 | if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY) | |
e48354ce | 1409 | return 0; |
3e1c81a9 | 1410 | else if (rc == DATAOUT_CANNOT_RECOVER) |
e48354ce NB |
1411 | return -1; |
1412 | ||
3e1c81a9 NB |
1413 | *out_cmd = cmd; |
1414 | return 0; | |
1415 | } | |
1416 | EXPORT_SYMBOL(iscsit_check_dataout_hdr); | |
1417 | ||
1418 | static int | |
1419 | iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1420 | struct iscsi_data *hdr) | |
1421 | { | |
1422 | struct kvec *iov; | |
1423 | u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0; | |
1424 | u32 payload_length = ntoh24(hdr->dlength); | |
1425 | int iov_ret, data_crc_failed = 0; | |
1426 | ||
e48354ce NB |
1427 | rx_size += payload_length; |
1428 | iov = &cmd->iov_data[0]; | |
1429 | ||
50e5c87d CH |
1430 | iov_ret = iscsit_map_iovec(cmd, iov, be32_to_cpu(hdr->offset), |
1431 | payload_length); | |
e48354ce NB |
1432 | if (iov_ret < 0) |
1433 | return -1; | |
1434 | ||
1435 | iov_count += iov_ret; | |
1436 | ||
1437 | padding = ((-payload_length) & 3); | |
1438 | if (padding != 0) { | |
1439 | iov[iov_count].iov_base = cmd->pad_bytes; | |
1440 | iov[iov_count++].iov_len = padding; | |
1441 | rx_size += padding; | |
1442 | pr_debug("Receiving %u padding bytes.\n", padding); | |
1443 | } | |
1444 | ||
1445 | if (conn->conn_ops->DataDigest) { | |
1446 | iov[iov_count].iov_base = &checksum; | |
1447 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
1448 | rx_size += ISCSI_CRC_LEN; | |
1449 | } | |
1450 | ||
1451 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
1452 | ||
1453 | iscsit_unmap_iovec(cmd); | |
1454 | ||
1455 | if (rx_got != rx_size) | |
1456 | return -1; | |
1457 | ||
1458 | if (conn->conn_ops->DataDigest) { | |
1459 | u32 data_crc; | |
1460 | ||
1461 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
50e5c87d CH |
1462 | be32_to_cpu(hdr->offset), |
1463 | payload_length, padding, | |
e48354ce NB |
1464 | cmd->pad_bytes); |
1465 | ||
1466 | if (checksum != data_crc) { | |
1467 | pr_err("ITT: 0x%08x, Offset: %u, Length: %u," | |
1468 | " DataSN: 0x%08x, CRC32C DataDigest 0x%08x" | |
1469 | " does not match computed 0x%08x\n", | |
1470 | hdr->itt, hdr->offset, payload_length, | |
1471 | hdr->datasn, checksum, data_crc); | |
1472 | data_crc_failed = 1; | |
1473 | } else { | |
1474 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
1475 | " %u bytes of Data Out\n", checksum, | |
1476 | payload_length); | |
1477 | } | |
1478 | } | |
3e1c81a9 NB |
1479 | |
1480 | return data_crc_failed; | |
1481 | } | |
1482 | ||
1483 | int | |
1484 | iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr, | |
1485 | bool data_crc_failed) | |
1486 | { | |
1487 | struct iscsi_conn *conn = cmd->conn; | |
1488 | int rc, ooo_cmdsn; | |
e48354ce NB |
1489 | /* |
1490 | * Increment post receive data and CRC values or perform | |
1491 | * within-command recovery. | |
1492 | */ | |
3e1c81a9 NB |
1493 | rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed); |
1494 | if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)) | |
e48354ce | 1495 | return 0; |
3e1c81a9 | 1496 | else if (rc == DATAOUT_SEND_R2T) { |
e48354ce | 1497 | iscsit_set_dataout_sequence_values(cmd); |
3e1c81a9 NB |
1498 | conn->conn_transport->iscsit_get_dataout(conn, cmd, false); |
1499 | } else if (rc == DATAOUT_SEND_TO_TRANSPORT) { | |
e48354ce NB |
1500 | /* |
1501 | * Handle extra special case for out of order | |
1502 | * Unsolicited Data Out. | |
1503 | */ | |
1504 | spin_lock_bh(&cmd->istate_lock); | |
1505 | ooo_cmdsn = (cmd->cmd_flags & ICF_OOO_CMDSN); | |
1506 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
1507 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
1508 | spin_unlock_bh(&cmd->istate_lock); | |
1509 | ||
1510 | iscsit_stop_dataout_timer(cmd); | |
67441b68 CH |
1511 | if (ooo_cmdsn) |
1512 | return 0; | |
1513 | target_execute_cmd(&cmd->se_cmd); | |
1514 | return 0; | |
e48354ce NB |
1515 | } else /* DATAOUT_CANNOT_RECOVER */ |
1516 | return -1; | |
1517 | ||
1518 | return 0; | |
1519 | } | |
3e1c81a9 | 1520 | EXPORT_SYMBOL(iscsit_check_dataout_payload); |
e48354ce | 1521 | |
3e1c81a9 NB |
1522 | static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf) |
1523 | { | |
1524 | struct iscsi_cmd *cmd; | |
1525 | struct iscsi_data *hdr = (struct iscsi_data *)buf; | |
1526 | int rc; | |
1527 | bool data_crc_failed = false; | |
1528 | ||
1529 | rc = iscsit_check_dataout_hdr(conn, buf, &cmd); | |
1530 | if (rc < 0) | |
1531 | return rc; | |
1532 | else if (!cmd) | |
1533 | return 0; | |
1534 | ||
1535 | rc = iscsit_get_dataout(conn, cmd, hdr); | |
1536 | if (rc < 0) | |
1537 | return rc; | |
1538 | else if (rc > 0) | |
1539 | data_crc_failed = true; | |
1540 | ||
1541 | return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed); | |
1542 | } | |
1543 | ||
1544 | int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1545 | unsigned char *buf) | |
e48354ce NB |
1546 | { |
1547 | unsigned char *ping_data = NULL; | |
1548 | int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size; | |
1549 | u32 checksum, data_crc, padding = 0, payload_length; | |
3e1c81a9 | 1550 | struct iscsi_cmd *cmd_p = NULL; |
e48354ce NB |
1551 | struct kvec *iov = NULL; |
1552 | struct iscsi_nopout *hdr; | |
1553 | ||
1554 | hdr = (struct iscsi_nopout *) buf; | |
1555 | payload_length = ntoh24(hdr->dlength); | |
e48354ce | 1556 | |
66c7db68 | 1557 | if (hdr->itt == RESERVED_ITT && !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { |
e48354ce NB |
1558 | pr_err("NOPOUT ITT is reserved, but Immediate Bit is" |
1559 | " not set, protocol error.\n"); | |
1560 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
1561 | buf, conn); | |
1562 | } | |
1563 | ||
21f5aa7e | 1564 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1565 | pr_err("NOPOUT Ping Data DataSegmentLength: %u is" |
21f5aa7e | 1566 | " greater than MaxXmitDataSegmentLength: %u, protocol" |
e48354ce | 1567 | " error.\n", payload_length, |
21f5aa7e | 1568 | conn->conn_ops->MaxXmitDataSegmentLength); |
e48354ce NB |
1569 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
1570 | buf, conn); | |
1571 | } | |
1572 | ||
3e1c81a9 | 1573 | pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x," |
e48354ce | 1574 | " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n", |
66c7db68 | 1575 | hdr->itt == RESERVED_ITT ? "Response" : "Request", |
e48354ce NB |
1576 | hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn, |
1577 | payload_length); | |
1578 | /* | |
1579 | * This is not a response to a Unsolicited NopIN, which means | |
1580 | * it can either be a NOPOUT ping request (with a valid ITT), | |
1581 | * or a NOPOUT not requesting a NOPIN (with a reserved ITT). | |
1582 | * Either way, make sure we allocate an struct iscsi_cmd, as both | |
1583 | * can contain ping data. | |
1584 | */ | |
50e5c87d | 1585 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1586 | if (!cmd) |
1587 | return iscsit_add_reject( | |
1588 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1589 | 1, buf, conn); | |
1590 | ||
1591 | cmd->iscsi_opcode = ISCSI_OP_NOOP_OUT; | |
1592 | cmd->i_state = ISTATE_SEND_NOPIN; | |
1593 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? | |
1594 | 1 : 0); | |
1595 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
1596 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1597 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1598 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1599 | cmd->data_direction = DMA_NONE; |
1600 | } | |
1601 | ||
50e5c87d | 1602 | if (payload_length && hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1603 | rx_size = payload_length; |
1604 | ping_data = kzalloc(payload_length + 1, GFP_KERNEL); | |
1605 | if (!ping_data) { | |
1606 | pr_err("Unable to allocate memory for" | |
1607 | " NOPOUT ping data.\n"); | |
1608 | ret = -1; | |
1609 | goto out; | |
1610 | } | |
1611 | ||
1612 | iov = &cmd->iov_misc[0]; | |
1613 | iov[niov].iov_base = ping_data; | |
1614 | iov[niov++].iov_len = payload_length; | |
1615 | ||
1616 | padding = ((-payload_length) & 3); | |
1617 | if (padding != 0) { | |
1618 | pr_debug("Receiving %u additional bytes" | |
1619 | " for padding.\n", padding); | |
1620 | iov[niov].iov_base = &cmd->pad_bytes; | |
1621 | iov[niov++].iov_len = padding; | |
1622 | rx_size += padding; | |
1623 | } | |
1624 | if (conn->conn_ops->DataDigest) { | |
1625 | iov[niov].iov_base = &checksum; | |
1626 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
1627 | rx_size += ISCSI_CRC_LEN; | |
1628 | } | |
1629 | ||
1630 | rx_got = rx_data(conn, &cmd->iov_misc[0], niov, rx_size); | |
1631 | if (rx_got != rx_size) { | |
1632 | ret = -1; | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | if (conn->conn_ops->DataDigest) { | |
1637 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
1638 | ping_data, payload_length, | |
1639 | padding, cmd->pad_bytes, | |
1640 | (u8 *)&data_crc); | |
1641 | ||
1642 | if (checksum != data_crc) { | |
1643 | pr_err("Ping data CRC32C DataDigest" | |
1644 | " 0x%08x does not match computed 0x%08x\n", | |
1645 | checksum, data_crc); | |
1646 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
1647 | pr_err("Unable to recover from" | |
1648 | " NOPOUT Ping DataCRC failure while in" | |
1649 | " ERL=0.\n"); | |
1650 | ret = -1; | |
1651 | goto out; | |
1652 | } else { | |
1653 | /* | |
1654 | * Silently drop this PDU and let the | |
1655 | * initiator plug the CmdSN gap. | |
1656 | */ | |
1657 | pr_debug("Dropping NOPOUT" | |
1658 | " Command CmdSN: 0x%08x due to" | |
1659 | " DataCRC error.\n", hdr->cmdsn); | |
1660 | ret = 0; | |
1661 | goto out; | |
1662 | } | |
1663 | } else { | |
1664 | pr_debug("Got CRC32C DataDigest" | |
1665 | " 0x%08x for %u bytes of ping data.\n", | |
1666 | checksum, payload_length); | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | ping_data[payload_length] = '\0'; | |
1671 | /* | |
1672 | * Attach ping data to struct iscsi_cmd->buf_ptr. | |
1673 | */ | |
8359cf43 | 1674 | cmd->buf_ptr = ping_data; |
e48354ce NB |
1675 | cmd->buf_ptr_size = payload_length; |
1676 | ||
1677 | pr_debug("Got %u bytes of NOPOUT ping" | |
1678 | " data.\n", payload_length); | |
1679 | pr_debug("Ping Data: \"%s\"\n", ping_data); | |
1680 | } | |
1681 | ||
66c7db68 | 1682 | if (hdr->itt != RESERVED_ITT) { |
e48354ce NB |
1683 | if (!cmd) { |
1684 | pr_err("Checking CmdSN for NOPOUT," | |
1685 | " but cmd is NULL!\n"); | |
1686 | return -1; | |
1687 | } | |
1688 | /* | |
1689 | * Initiator is expecting a NopIN ping reply, | |
1690 | */ | |
1691 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1692 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1693 | spin_unlock_bh(&conn->cmd_lock); |
1694 | ||
50e5c87d | 1695 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
1696 | |
1697 | if (hdr->opcode & ISCSI_OP_IMMEDIATE) { | |
1698 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
1699 | cmd->i_state); | |
1700 | return 0; | |
1701 | } | |
1702 | ||
1703 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1704 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
1705 | ret = 0; | |
1706 | goto ping_out; | |
1707 | } | |
1708 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
1709 | return iscsit_add_reject_from_cmd( | |
1710 | ISCSI_REASON_PROTOCOL_ERROR, | |
1711 | 1, 0, buf, cmd); | |
1712 | ||
1713 | return 0; | |
1714 | } | |
1715 | ||
50e5c87d | 1716 | if (hdr->ttt != cpu_to_be32(0xFFFFFFFF)) { |
e48354ce NB |
1717 | /* |
1718 | * This was a response to a unsolicited NOPIN ping. | |
1719 | */ | |
3e1c81a9 NB |
1720 | cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt)); |
1721 | if (!cmd_p) | |
e48354ce NB |
1722 | return -1; |
1723 | ||
1724 | iscsit_stop_nopin_response_timer(conn); | |
1725 | ||
3e1c81a9 NB |
1726 | cmd_p->i_state = ISTATE_REMOVE; |
1727 | iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state); | |
e48354ce NB |
1728 | iscsit_start_nopin_timer(conn); |
1729 | } else { | |
1730 | /* | |
1731 | * Initiator is not expecting a NOPIN is response. | |
1732 | * Just ignore for now. | |
1733 | * | |
1734 | * iSCSI v19-91 10.18 | |
1735 | * "A NOP-OUT may also be used to confirm a changed | |
1736 | * ExpStatSN if another PDU will not be available | |
1737 | * for a long time." | |
1738 | */ | |
1739 | ret = 0; | |
1740 | goto out; | |
1741 | } | |
1742 | ||
1743 | return 0; | |
1744 | out: | |
1745 | if (cmd) | |
1746 | iscsit_release_cmd(cmd); | |
1747 | ping_out: | |
1748 | kfree(ping_data); | |
1749 | return ret; | |
1750 | } | |
3e1c81a9 | 1751 | EXPORT_SYMBOL(iscsit_handle_nop_out); |
e48354ce | 1752 | |
3e1c81a9 NB |
1753 | int |
1754 | iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
1755 | unsigned char *buf) | |
e48354ce | 1756 | { |
e48354ce NB |
1757 | struct se_tmr_req *se_tmr; |
1758 | struct iscsi_tmr_req *tmr_req; | |
1759 | struct iscsi_tm *hdr; | |
e48354ce NB |
1760 | int out_of_order_cmdsn = 0; |
1761 | int ret; | |
1762 | u8 function; | |
1763 | ||
1764 | hdr = (struct iscsi_tm *) buf; | |
e48354ce NB |
1765 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; |
1766 | function = hdr->flags; | |
1767 | ||
1768 | pr_debug("Got Task Management Request ITT: 0x%08x, CmdSN:" | |
1769 | " 0x%08x, Function: 0x%02x, RefTaskTag: 0x%08x, RefCmdSN:" | |
1770 | " 0x%08x, CID: %hu\n", hdr->itt, hdr->cmdsn, function, | |
1771 | hdr->rtt, hdr->refcmdsn, conn->cid); | |
1772 | ||
1773 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
1774 | ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
66c7db68 | 1775 | hdr->rtt != RESERVED_ITT)) { |
e48354ce | 1776 | pr_err("RefTaskTag should be set to 0xFFFFFFFF.\n"); |
66c7db68 | 1777 | hdr->rtt = RESERVED_ITT; |
e48354ce NB |
1778 | } |
1779 | ||
1780 | if ((function == ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1781 | !(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1782 | pr_err("Task Management Request TASK_REASSIGN not" | |
1783 | " issued as immediate command, bad iSCSI Initiator" | |
1784 | "implementation\n"); | |
3e1c81a9 NB |
1785 | return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR, |
1786 | 1, 1, buf, cmd); | |
e48354ce NB |
1787 | } |
1788 | if ((function != ISCSI_TM_FUNC_ABORT_TASK) && | |
50e5c87d CH |
1789 | be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG) |
1790 | hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG); | |
e48354ce | 1791 | |
d28b1169 AG |
1792 | cmd->data_direction = DMA_NONE; |
1793 | ||
1794 | cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL); | |
1795 | if (!cmd->tmr_req) { | |
1796 | pr_err("Unable to allocate memory for" | |
1797 | " Task Management command!\n"); | |
1798 | return iscsit_add_reject_from_cmd( | |
1799 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1800 | 1, 1, buf, cmd); | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * TASK_REASSIGN for ERL=2 / connection stays inside of | |
1805 | * LIO-Target $FABRIC_MOD | |
1806 | */ | |
1807 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
1808 | ||
1809 | u8 tcm_function; | |
1810 | int ret; | |
1811 | ||
1812 | transport_init_se_cmd(&cmd->se_cmd, | |
1813 | &lio_target_fabric_configfs->tf_ops, | |
1814 | conn->sess->se_sess, 0, DMA_NONE, | |
9c58b7dd | 1815 | MSG_SIMPLE_TAG, cmd->sense_buffer + 2); |
d28b1169 AG |
1816 | |
1817 | switch (function) { | |
1818 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1819 | tcm_function = TMR_ABORT_TASK; | |
1820 | break; | |
1821 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1822 | tcm_function = TMR_ABORT_TASK_SET; | |
1823 | break; | |
1824 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1825 | tcm_function = TMR_CLEAR_ACA; | |
1826 | break; | |
1827 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1828 | tcm_function = TMR_CLEAR_TASK_SET; | |
1829 | break; | |
1830 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1831 | tcm_function = TMR_LUN_RESET; | |
1832 | break; | |
1833 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1834 | tcm_function = TMR_TARGET_WARM_RESET; | |
1835 | break; | |
1836 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1837 | tcm_function = TMR_TARGET_COLD_RESET; | |
1838 | break; | |
1839 | default: | |
1840 | pr_err("Unknown iSCSI TMR Function:" | |
1841 | " 0x%02x\n", function); | |
1842 | return iscsit_add_reject_from_cmd( | |
1843 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1844 | 1, 1, buf, cmd); | |
1845 | } | |
1846 | ||
1847 | ret = core_tmr_alloc_req(&cmd->se_cmd, cmd->tmr_req, | |
1848 | tcm_function, GFP_KERNEL); | |
1849 | if (ret < 0) | |
1850 | return iscsit_add_reject_from_cmd( | |
1851 | ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
1852 | 1, 1, buf, cmd); | |
1853 | ||
1854 | cmd->tmr_req->se_tmr_req = cmd->se_cmd.se_tmr_req; | |
1855 | } | |
e48354ce NB |
1856 | |
1857 | cmd->iscsi_opcode = ISCSI_OP_SCSI_TMFUNC; | |
1858 | cmd->i_state = ISTATE_SEND_TASKMGTRSP; | |
1859 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
1860 | cmd->init_task_tag = hdr->itt; | |
1861 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
1862 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
1863 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
1864 | se_tmr = cmd->se_cmd.se_tmr_req; |
1865 | tmr_req = cmd->tmr_req; | |
1866 | /* | |
1867 | * Locate the struct se_lun for all TMRs not related to ERL=2 TASK_REASSIGN | |
1868 | */ | |
1869 | if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { | |
4f26998a AG |
1870 | ret = transport_lookup_tmr_lun(&cmd->se_cmd, |
1871 | scsilun_to_int(&hdr->lun)); | |
e48354ce | 1872 | if (ret < 0) { |
e48354ce NB |
1873 | se_tmr->response = ISCSI_TMF_RSP_NO_LUN; |
1874 | goto attach; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | switch (function) { | |
1879 | case ISCSI_TM_FUNC_ABORT_TASK: | |
1880 | se_tmr->response = iscsit_tmr_abort_task(cmd, buf); | |
de103c93 | 1881 | if (se_tmr->response) |
e48354ce | 1882 | goto attach; |
e48354ce NB |
1883 | break; |
1884 | case ISCSI_TM_FUNC_ABORT_TASK_SET: | |
1885 | case ISCSI_TM_FUNC_CLEAR_ACA: | |
1886 | case ISCSI_TM_FUNC_CLEAR_TASK_SET: | |
1887 | case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET: | |
1888 | break; | |
1889 | case ISCSI_TM_FUNC_TARGET_WARM_RESET: | |
1890 | if (iscsit_tmr_task_warm_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1891 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1892 | goto attach; | |
1893 | } | |
1894 | break; | |
1895 | case ISCSI_TM_FUNC_TARGET_COLD_RESET: | |
1896 | if (iscsit_tmr_task_cold_reset(conn, tmr_req, buf) < 0) { | |
e48354ce NB |
1897 | se_tmr->response = ISCSI_TMF_RSP_AUTH_FAILED; |
1898 | goto attach; | |
1899 | } | |
1900 | break; | |
1901 | case ISCSI_TM_FUNC_TASK_REASSIGN: | |
1902 | se_tmr->response = iscsit_tmr_task_reassign(cmd, buf); | |
1903 | /* | |
1904 | * Perform sanity checks on the ExpDataSN only if the | |
1905 | * TASK_REASSIGN was successful. | |
1906 | */ | |
de103c93 | 1907 | if (se_tmr->response) |
e48354ce NB |
1908 | break; |
1909 | ||
1910 | if (iscsit_check_task_reassign_expdatasn(tmr_req, conn) < 0) | |
1911 | return iscsit_add_reject_from_cmd( | |
1912 | ISCSI_REASON_BOOKMARK_INVALID, 1, 1, | |
1913 | buf, cmd); | |
1914 | break; | |
1915 | default: | |
1916 | pr_err("Unknown TMR function: 0x%02x, protocol" | |
1917 | " error.\n", function); | |
e48354ce NB |
1918 | se_tmr->response = ISCSI_TMF_RSP_NOT_SUPPORTED; |
1919 | goto attach; | |
1920 | } | |
1921 | ||
1922 | if ((function != ISCSI_TM_FUNC_TASK_REASSIGN) && | |
1923 | (se_tmr->response == ISCSI_TMF_RSP_COMPLETE)) | |
1924 | se_tmr->call_transport = 1; | |
1925 | attach: | |
1926 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 1927 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
1928 | spin_unlock_bh(&conn->cmd_lock); |
1929 | ||
1930 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
1931 | int cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
1932 | if (cmdsn_ret == CMDSN_HIGHER_THAN_EXP) | |
1933 | out_of_order_cmdsn = 1; | |
5a4c8666 | 1934 | else if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) |
e48354ce | 1935 | return 0; |
5a4c8666 | 1936 | else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) |
e48354ce NB |
1937 | return iscsit_add_reject_from_cmd( |
1938 | ISCSI_REASON_PROTOCOL_ERROR, | |
1939 | 1, 0, buf, cmd); | |
e48354ce | 1940 | } |
50e5c87d | 1941 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce | 1942 | |
5a4c8666 | 1943 | if (out_of_order_cmdsn || !(hdr->opcode & ISCSI_OP_IMMEDIATE)) |
e48354ce NB |
1944 | return 0; |
1945 | /* | |
1946 | * Found the referenced task, send to transport for processing. | |
1947 | */ | |
1948 | if (se_tmr->call_transport) | |
1949 | return transport_generic_handle_tmr(&cmd->se_cmd); | |
1950 | ||
1951 | /* | |
1952 | * Could not find the referenced LUN, task, or Task Management | |
1953 | * command not authorized or supported. Change state and | |
1954 | * let the tx_thread send the response. | |
1955 | * | |
1956 | * For connection recovery, this is also the default action for | |
1957 | * TMR TASK_REASSIGN. | |
1958 | */ | |
1959 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
1960 | return 0; | |
1961 | } | |
3e1c81a9 | 1962 | EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd); |
e48354ce NB |
1963 | |
1964 | /* #warning FIXME: Support Text Command parameters besides SendTargets */ | |
1965 | static int iscsit_handle_text_cmd( | |
1966 | struct iscsi_conn *conn, | |
1967 | unsigned char *buf) | |
1968 | { | |
1969 | char *text_ptr, *text_in; | |
1970 | int cmdsn_ret, niov = 0, rx_got, rx_size; | |
1971 | u32 checksum = 0, data_crc = 0, payload_length; | |
76f1928e | 1972 | u32 padding = 0, pad_bytes = 0, text_length = 0; |
e48354ce NB |
1973 | struct iscsi_cmd *cmd; |
1974 | struct kvec iov[3]; | |
1975 | struct iscsi_text *hdr; | |
1976 | ||
1977 | hdr = (struct iscsi_text *) buf; | |
1978 | payload_length = ntoh24(hdr->dlength); | |
e48354ce | 1979 | |
21f5aa7e | 1980 | if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) { |
e48354ce | 1981 | pr_err("Unable to accept text parameter length: %u" |
21f5aa7e NB |
1982 | "greater than MaxXmitDataSegmentLength %u.\n", |
1983 | payload_length, conn->conn_ops->MaxXmitDataSegmentLength); | |
e48354ce NB |
1984 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, |
1985 | buf, conn); | |
1986 | } | |
1987 | ||
1988 | pr_debug("Got Text Request: ITT: 0x%08x, CmdSN: 0x%08x," | |
1989 | " ExpStatSN: 0x%08x, Length: %u\n", hdr->itt, hdr->cmdsn, | |
1990 | hdr->exp_statsn, payload_length); | |
1991 | ||
1992 | rx_size = text_length = payload_length; | |
1993 | if (text_length) { | |
1994 | text_in = kzalloc(text_length, GFP_KERNEL); | |
1995 | if (!text_in) { | |
1996 | pr_err("Unable to allocate memory for" | |
1997 | " incoming text parameters\n"); | |
1998 | return -1; | |
1999 | } | |
2000 | ||
2001 | memset(iov, 0, 3 * sizeof(struct kvec)); | |
2002 | iov[niov].iov_base = text_in; | |
2003 | iov[niov++].iov_len = text_length; | |
2004 | ||
2005 | padding = ((-payload_length) & 3); | |
2006 | if (padding != 0) { | |
76f1928e | 2007 | iov[niov].iov_base = &pad_bytes; |
e48354ce NB |
2008 | iov[niov++].iov_len = padding; |
2009 | rx_size += padding; | |
2010 | pr_debug("Receiving %u additional bytes" | |
2011 | " for padding.\n", padding); | |
2012 | } | |
2013 | if (conn->conn_ops->DataDigest) { | |
2014 | iov[niov].iov_base = &checksum; | |
2015 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2016 | rx_size += ISCSI_CRC_LEN; | |
2017 | } | |
2018 | ||
2019 | rx_got = rx_data(conn, &iov[0], niov, rx_size); | |
2020 | if (rx_got != rx_size) { | |
2021 | kfree(text_in); | |
2022 | return -1; | |
2023 | } | |
2024 | ||
2025 | if (conn->conn_ops->DataDigest) { | |
2026 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
2027 | text_in, text_length, | |
76f1928e | 2028 | padding, (u8 *)&pad_bytes, |
e48354ce NB |
2029 | (u8 *)&data_crc); |
2030 | ||
2031 | if (checksum != data_crc) { | |
2032 | pr_err("Text data CRC32C DataDigest" | |
2033 | " 0x%08x does not match computed" | |
2034 | " 0x%08x\n", checksum, data_crc); | |
2035 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2036 | pr_err("Unable to recover from" | |
2037 | " Text Data digest failure while in" | |
2038 | " ERL=0.\n"); | |
2039 | kfree(text_in); | |
2040 | return -1; | |
2041 | } else { | |
2042 | /* | |
2043 | * Silently drop this PDU and let the | |
2044 | * initiator plug the CmdSN gap. | |
2045 | */ | |
2046 | pr_debug("Dropping Text" | |
2047 | " Command CmdSN: 0x%08x due to" | |
2048 | " DataCRC error.\n", hdr->cmdsn); | |
2049 | kfree(text_in); | |
2050 | return 0; | |
2051 | } | |
2052 | } else { | |
2053 | pr_debug("Got CRC32C DataDigest" | |
2054 | " 0x%08x for %u bytes of text data.\n", | |
2055 | checksum, text_length); | |
2056 | } | |
2057 | } | |
2058 | text_in[text_length - 1] = '\0'; | |
2059 | pr_debug("Successfully read %d bytes of text" | |
2060 | " data.\n", text_length); | |
2061 | ||
2062 | if (strncmp("SendTargets", text_in, 11) != 0) { | |
2063 | pr_err("Received Text Data that is not" | |
2064 | " SendTargets, cannot continue.\n"); | |
2065 | kfree(text_in); | |
2066 | return -1; | |
2067 | } | |
2068 | text_ptr = strchr(text_in, '='); | |
2069 | if (!text_ptr) { | |
2070 | pr_err("No \"=\" separator found in Text Data," | |
2071 | " cannot continue.\n"); | |
2072 | kfree(text_in); | |
2073 | return -1; | |
2074 | } | |
2075 | if (strncmp("=All", text_ptr, 4) != 0) { | |
2076 | pr_err("Unable to locate All value for" | |
2077 | " SendTargets key, cannot continue.\n"); | |
2078 | kfree(text_in); | |
2079 | return -1; | |
2080 | } | |
2081 | /*#warning Support SendTargets=(iSCSI Target Name/Nothing) values. */ | |
2082 | kfree(text_in); | |
2083 | } | |
2084 | ||
2085 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
2086 | if (!cmd) | |
2087 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
2088 | 1, buf, conn); | |
2089 | ||
2090 | cmd->iscsi_opcode = ISCSI_OP_TEXT; | |
2091 | cmd->i_state = ISTATE_SEND_TEXTRSP; | |
2092 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2093 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2094 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2095 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2096 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
e48354ce NB |
2097 | cmd->data_direction = DMA_NONE; |
2098 | ||
2099 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2100 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2101 | spin_unlock_bh(&conn->cmd_lock); |
2102 | ||
50e5c87d | 2103 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2104 | |
2105 | if (!(hdr->opcode & ISCSI_OP_IMMEDIATE)) { | |
2106 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
2107 | if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) | |
2108 | return iscsit_add_reject_from_cmd( | |
2109 | ISCSI_REASON_PROTOCOL_ERROR, | |
2110 | 1, 0, buf, cmd); | |
2111 | ||
2112 | return 0; | |
2113 | } | |
2114 | ||
2115 | return iscsit_execute_cmd(cmd, 0); | |
2116 | } | |
2117 | ||
2118 | int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2119 | { | |
2120 | struct iscsi_conn *conn_p; | |
2121 | struct iscsi_session *sess = conn->sess; | |
2122 | ||
2123 | pr_debug("Received logout request CLOSESESSION on CID: %hu" | |
2124 | " for SID: %u.\n", conn->cid, conn->sess->sid); | |
2125 | ||
2126 | atomic_set(&sess->session_logout, 1); | |
2127 | atomic_set(&conn->conn_logout_remove, 1); | |
2128 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_SESSION; | |
2129 | ||
2130 | iscsit_inc_conn_usage_count(conn); | |
2131 | iscsit_inc_session_usage_count(sess); | |
2132 | ||
2133 | spin_lock_bh(&sess->conn_lock); | |
2134 | list_for_each_entry(conn_p, &sess->sess_conn_list, conn_list) { | |
2135 | if (conn_p->conn_state != TARG_CONN_STATE_LOGGED_IN) | |
2136 | continue; | |
2137 | ||
2138 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2139 | conn_p->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2140 | } | |
2141 | spin_unlock_bh(&sess->conn_lock); | |
2142 | ||
2143 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2144 | ||
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | int iscsit_logout_closeconnection(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2149 | { | |
2150 | struct iscsi_conn *l_conn; | |
2151 | struct iscsi_session *sess = conn->sess; | |
2152 | ||
2153 | pr_debug("Received logout request CLOSECONNECTION for CID:" | |
2154 | " %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2155 | ||
2156 | /* | |
2157 | * A Logout Request with a CLOSECONNECTION reason code for a CID | |
2158 | * can arrive on a connection with a differing CID. | |
2159 | */ | |
2160 | if (conn->cid == cmd->logout_cid) { | |
2161 | spin_lock_bh(&conn->state_lock); | |
2162 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
2163 | conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
2164 | ||
2165 | atomic_set(&conn->conn_logout_remove, 1); | |
2166 | conn->conn_logout_reason = ISCSI_LOGOUT_REASON_CLOSE_CONNECTION; | |
2167 | iscsit_inc_conn_usage_count(conn); | |
2168 | ||
2169 | spin_unlock_bh(&conn->state_lock); | |
2170 | } else { | |
2171 | /* | |
2172 | * Handle all different cid CLOSECONNECTION requests in | |
2173 | * iscsit_logout_post_handler_diffcid() as to give enough | |
2174 | * time for any non immediate command's CmdSN to be | |
2175 | * acknowledged on the connection in question. | |
2176 | * | |
2177 | * Here we simply make sure the CID is still around. | |
2178 | */ | |
2179 | l_conn = iscsit_get_conn_from_cid(sess, | |
2180 | cmd->logout_cid); | |
2181 | if (!l_conn) { | |
2182 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2183 | iscsit_add_cmd_to_response_queue(cmd, conn, | |
2184 | cmd->i_state); | |
2185 | return 0; | |
2186 | } | |
2187 | ||
2188 | iscsit_dec_conn_usage_count(l_conn); | |
2189 | } | |
2190 | ||
2191 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2192 | ||
2193 | return 0; | |
2194 | } | |
2195 | ||
2196 | int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2197 | { | |
2198 | struct iscsi_session *sess = conn->sess; | |
2199 | ||
2200 | pr_debug("Received explicit REMOVECONNFORRECOVERY logout for" | |
2201 | " CID: %hu on CID: %hu.\n", cmd->logout_cid, conn->cid); | |
2202 | ||
2203 | if (sess->sess_ops->ErrorRecoveryLevel != 2) { | |
2204 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2205 | " while ERL!=2.\n"); | |
2206 | cmd->logout_response = ISCSI_LOGOUT_RECOVERY_UNSUPPORTED; | |
2207 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | if (conn->cid == cmd->logout_cid) { | |
2212 | pr_err("Received Logout Request REMOVECONNFORRECOVERY" | |
2213 | " with CID: %hu on CID: %hu, implementation error.\n", | |
2214 | cmd->logout_cid, conn->cid); | |
2215 | cmd->logout_response = ISCSI_LOGOUT_CLEANUP_FAILED; | |
2216 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2217 | return 0; | |
2218 | } | |
2219 | ||
2220 | iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); | |
2221 | ||
2222 | return 0; | |
2223 | } | |
2224 | ||
3e1c81a9 NB |
2225 | int |
2226 | iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, | |
2227 | unsigned char *buf) | |
e48354ce NB |
2228 | { |
2229 | int cmdsn_ret, logout_remove = 0; | |
2230 | u8 reason_code = 0; | |
e48354ce NB |
2231 | struct iscsi_logout *hdr; |
2232 | struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn); | |
2233 | ||
2234 | hdr = (struct iscsi_logout *) buf; | |
2235 | reason_code = (hdr->flags & 0x7f); | |
e48354ce NB |
2236 | |
2237 | if (tiqn) { | |
2238 | spin_lock(&tiqn->logout_stats.lock); | |
2239 | if (reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) | |
2240 | tiqn->logout_stats.normal_logouts++; | |
2241 | else | |
2242 | tiqn->logout_stats.abnormal_logouts++; | |
2243 | spin_unlock(&tiqn->logout_stats.lock); | |
2244 | } | |
2245 | ||
2246 | pr_debug("Got Logout Request ITT: 0x%08x CmdSN: 0x%08x" | |
2247 | " ExpStatSN: 0x%08x Reason: 0x%02x CID: %hu on CID: %hu\n", | |
2248 | hdr->itt, hdr->cmdsn, hdr->exp_statsn, reason_code, | |
2249 | hdr->cid, conn->cid); | |
2250 | ||
2251 | if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) { | |
2252 | pr_err("Received logout request on connection that" | |
2253 | " is not in logged in state, ignoring request.\n"); | |
3e1c81a9 | 2254 | iscsit_release_cmd(cmd); |
e48354ce NB |
2255 | return 0; |
2256 | } | |
2257 | ||
e48354ce NB |
2258 | cmd->iscsi_opcode = ISCSI_OP_LOGOUT; |
2259 | cmd->i_state = ISTATE_SEND_LOGOUTRSP; | |
2260 | cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0); | |
2261 | conn->sess->init_task_tag = cmd->init_task_tag = hdr->itt; | |
2262 | cmd->targ_xfer_tag = 0xFFFFFFFF; | |
50e5c87d CH |
2263 | cmd->cmd_sn = be32_to_cpu(hdr->cmdsn); |
2264 | cmd->exp_stat_sn = be32_to_cpu(hdr->exp_statsn); | |
2265 | cmd->logout_cid = be16_to_cpu(hdr->cid); | |
e48354ce NB |
2266 | cmd->logout_reason = reason_code; |
2267 | cmd->data_direction = DMA_NONE; | |
2268 | ||
2269 | /* | |
2270 | * We need to sleep in these cases (by returning 1) until the Logout | |
2271 | * Response gets sent in the tx thread. | |
2272 | */ | |
2273 | if ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_SESSION) || | |
2274 | ((reason_code == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) && | |
50e5c87d | 2275 | be16_to_cpu(hdr->cid) == conn->cid)) |
e48354ce NB |
2276 | logout_remove = 1; |
2277 | ||
2278 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 2279 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
2280 | spin_unlock_bh(&conn->cmd_lock); |
2281 | ||
2282 | if (reason_code != ISCSI_LOGOUT_REASON_RECOVERY) | |
50e5c87d | 2283 | iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn)); |
e48354ce NB |
2284 | |
2285 | /* | |
2286 | * Immediate commands are executed, well, immediately. | |
2287 | * Non-Immediate Logout Commands are executed in CmdSN order. | |
2288 | */ | |
c6037cc5 | 2289 | if (cmd->immediate_cmd) { |
e48354ce NB |
2290 | int ret = iscsit_execute_cmd(cmd, 0); |
2291 | ||
2292 | if (ret < 0) | |
2293 | return ret; | |
2294 | } else { | |
2295 | cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn); | |
2296 | if (cmdsn_ret == CMDSN_LOWER_THAN_EXP) { | |
2297 | logout_remove = 0; | |
2298 | } else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER) { | |
2299 | return iscsit_add_reject_from_cmd( | |
2300 | ISCSI_REASON_PROTOCOL_ERROR, | |
2301 | 1, 0, buf, cmd); | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | return logout_remove; | |
2306 | } | |
3e1c81a9 | 2307 | EXPORT_SYMBOL(iscsit_handle_logout_cmd); |
e48354ce NB |
2308 | |
2309 | static int iscsit_handle_snack( | |
2310 | struct iscsi_conn *conn, | |
2311 | unsigned char *buf) | |
2312 | { | |
e48354ce NB |
2313 | struct iscsi_snack *hdr; |
2314 | ||
2315 | hdr = (struct iscsi_snack *) buf; | |
2316 | hdr->flags &= ~ISCSI_FLAG_CMD_FINAL; | |
e48354ce NB |
2317 | |
2318 | pr_debug("Got ISCSI_INIT_SNACK, ITT: 0x%08x, ExpStatSN:" | |
2319 | " 0x%08x, Type: 0x%02x, BegRun: 0x%08x, RunLength: 0x%08x," | |
2320 | " CID: %hu\n", hdr->itt, hdr->exp_statsn, hdr->flags, | |
2321 | hdr->begrun, hdr->runlength, conn->cid); | |
2322 | ||
2323 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2324 | pr_err("Initiator sent SNACK request while in" | |
2325 | " ErrorRecoveryLevel=0.\n"); | |
2326 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2327 | buf, conn); | |
2328 | } | |
2329 | /* | |
2330 | * SNACK_DATA and SNACK_R2T are both 0, so check which function to | |
2331 | * call from inside iscsi_send_recovery_datain_or_r2t(). | |
2332 | */ | |
2333 | switch (hdr->flags & ISCSI_FLAG_SNACK_TYPE_MASK) { | |
2334 | case 0: | |
2335 | return iscsit_handle_recovery_datain_or_r2t(conn, buf, | |
50e5c87d CH |
2336 | hdr->itt, |
2337 | be32_to_cpu(hdr->ttt), | |
2338 | be32_to_cpu(hdr->begrun), | |
2339 | be32_to_cpu(hdr->runlength)); | |
e48354ce | 2340 | case ISCSI_FLAG_SNACK_TYPE_STATUS: |
50e5c87d CH |
2341 | return iscsit_handle_status_snack(conn, hdr->itt, |
2342 | be32_to_cpu(hdr->ttt), | |
2343 | be32_to_cpu(hdr->begrun), be32_to_cpu(hdr->runlength)); | |
e48354ce | 2344 | case ISCSI_FLAG_SNACK_TYPE_DATA_ACK: |
50e5c87d CH |
2345 | return iscsit_handle_data_ack(conn, be32_to_cpu(hdr->ttt), |
2346 | be32_to_cpu(hdr->begrun), | |
2347 | be32_to_cpu(hdr->runlength)); | |
e48354ce NB |
2348 | case ISCSI_FLAG_SNACK_TYPE_RDATA: |
2349 | /* FIXME: Support R-Data SNACK */ | |
2350 | pr_err("R-Data SNACK Not Supported.\n"); | |
2351 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2352 | buf, conn); | |
2353 | default: | |
2354 | pr_err("Unknown SNACK type 0x%02x, protocol" | |
2355 | " error.\n", hdr->flags & 0x0f); | |
2356 | return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
2357 | buf, conn); | |
2358 | } | |
2359 | ||
2360 | return 0; | |
2361 | } | |
2362 | ||
2363 | static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn) | |
2364 | { | |
2365 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2366 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2367 | wait_for_completion_interruptible_timeout( | |
2368 | &conn->rx_half_close_comp, | |
2369 | ISCSI_RX_THREAD_TCP_TIMEOUT * HZ); | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | static int iscsit_handle_immediate_data( | |
2374 | struct iscsi_cmd *cmd, | |
3e1c81a9 | 2375 | struct iscsi_scsi_req *hdr, |
e48354ce NB |
2376 | u32 length) |
2377 | { | |
2378 | int iov_ret, rx_got = 0, rx_size = 0; | |
2379 | u32 checksum, iov_count = 0, padding = 0; | |
2380 | struct iscsi_conn *conn = cmd->conn; | |
2381 | struct kvec *iov; | |
2382 | ||
2383 | iov_ret = iscsit_map_iovec(cmd, cmd->iov_data, cmd->write_data_done, length); | |
2384 | if (iov_ret < 0) | |
2385 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2386 | ||
2387 | rx_size = length; | |
2388 | iov_count = iov_ret; | |
2389 | iov = &cmd->iov_data[0]; | |
2390 | ||
2391 | padding = ((-length) & 3); | |
2392 | if (padding != 0) { | |
2393 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2394 | iov[iov_count++].iov_len = padding; | |
2395 | rx_size += padding; | |
2396 | } | |
2397 | ||
2398 | if (conn->conn_ops->DataDigest) { | |
2399 | iov[iov_count].iov_base = &checksum; | |
2400 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2401 | rx_size += ISCSI_CRC_LEN; | |
2402 | } | |
2403 | ||
2404 | rx_got = rx_data(conn, &cmd->iov_data[0], iov_count, rx_size); | |
2405 | ||
2406 | iscsit_unmap_iovec(cmd); | |
2407 | ||
2408 | if (rx_got != rx_size) { | |
2409 | iscsit_rx_thread_wait_for_tcp(conn); | |
2410 | return IMMEDIATE_DATA_CANNOT_RECOVER; | |
2411 | } | |
2412 | ||
2413 | if (conn->conn_ops->DataDigest) { | |
2414 | u32 data_crc; | |
2415 | ||
2416 | data_crc = iscsit_do_crypto_hash_sg(&conn->conn_rx_hash, cmd, | |
2417 | cmd->write_data_done, length, padding, | |
2418 | cmd->pad_bytes); | |
2419 | ||
2420 | if (checksum != data_crc) { | |
2421 | pr_err("ImmediateData CRC32C DataDigest 0x%08x" | |
2422 | " does not match computed 0x%08x\n", checksum, | |
2423 | data_crc); | |
2424 | ||
2425 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
2426 | pr_err("Unable to recover from" | |
2427 | " Immediate Data digest failure while" | |
2428 | " in ERL=0.\n"); | |
2429 | iscsit_add_reject_from_cmd( | |
2430 | ISCSI_REASON_DATA_DIGEST_ERROR, | |
3e1c81a9 | 2431 | 1, 0, (unsigned char *)hdr, cmd); |
e48354ce NB |
2432 | return IMMEDIATE_DATA_CANNOT_RECOVER; |
2433 | } else { | |
2434 | iscsit_add_reject_from_cmd( | |
2435 | ISCSI_REASON_DATA_DIGEST_ERROR, | |
3e1c81a9 | 2436 | 0, 0, (unsigned char *)hdr, cmd); |
e48354ce NB |
2437 | return IMMEDIATE_DATA_ERL1_CRC_FAILURE; |
2438 | } | |
2439 | } else { | |
2440 | pr_debug("Got CRC32C DataDigest 0x%08x for" | |
2441 | " %u bytes of Immediate Data\n", checksum, | |
2442 | length); | |
2443 | } | |
2444 | } | |
2445 | ||
2446 | cmd->write_data_done += length; | |
2447 | ||
ebf1d95c | 2448 | if (cmd->write_data_done == cmd->se_cmd.data_length) { |
e48354ce NB |
2449 | spin_lock_bh(&cmd->istate_lock); |
2450 | cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; | |
2451 | cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; | |
2452 | spin_unlock_bh(&cmd->istate_lock); | |
2453 | } | |
2454 | ||
2455 | return IMMEDIATE_DATA_NORMAL_OPERATION; | |
2456 | } | |
2457 | ||
2458 | /* | |
2459 | * Called with sess->conn_lock held. | |
2460 | */ | |
2461 | /* #warning iscsi_build_conn_drop_async_message() only sends out on connections | |
2462 | with active network interface */ | |
2463 | static void iscsit_build_conn_drop_async_message(struct iscsi_conn *conn) | |
2464 | { | |
2465 | struct iscsi_cmd *cmd; | |
2466 | struct iscsi_conn *conn_p; | |
2467 | ||
2468 | /* | |
2469 | * Only send a Asynchronous Message on connections whos network | |
2470 | * interface is still functional. | |
2471 | */ | |
2472 | list_for_each_entry(conn_p, &conn->sess->sess_conn_list, conn_list) { | |
2473 | if (conn_p->conn_state == TARG_CONN_STATE_LOGGED_IN) { | |
2474 | iscsit_inc_conn_usage_count(conn_p); | |
2475 | break; | |
2476 | } | |
2477 | } | |
2478 | ||
2479 | if (!conn_p) | |
2480 | return; | |
2481 | ||
3c989d76 | 2482 | cmd = iscsit_allocate_cmd(conn_p, GFP_ATOMIC); |
e48354ce NB |
2483 | if (!cmd) { |
2484 | iscsit_dec_conn_usage_count(conn_p); | |
2485 | return; | |
2486 | } | |
2487 | ||
2488 | cmd->logout_cid = conn->cid; | |
2489 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2490 | cmd->i_state = ISTATE_SEND_ASYNCMSG; | |
2491 | ||
2492 | spin_lock_bh(&conn_p->cmd_lock); | |
2fbb471e | 2493 | list_add_tail(&cmd->i_conn_node, &conn_p->conn_cmd_list); |
e48354ce NB |
2494 | spin_unlock_bh(&conn_p->cmd_lock); |
2495 | ||
2496 | iscsit_add_cmd_to_response_queue(cmd, conn_p, cmd->i_state); | |
2497 | iscsit_dec_conn_usage_count(conn_p); | |
2498 | } | |
2499 | ||
2500 | static int iscsit_send_conn_drop_async_message( | |
2501 | struct iscsi_cmd *cmd, | |
2502 | struct iscsi_conn *conn) | |
2503 | { | |
2504 | struct iscsi_async *hdr; | |
2505 | ||
2506 | cmd->tx_size = ISCSI_HDR_LEN; | |
2507 | cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT; | |
2508 | ||
2509 | hdr = (struct iscsi_async *) cmd->pdu; | |
2510 | hdr->opcode = ISCSI_OP_ASYNC_EVENT; | |
2511 | hdr->flags = ISCSI_FLAG_CMD_FINAL; | |
66c7db68 | 2512 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
2513 | cmd->targ_xfer_tag = 0xFFFFFFFF; |
2514 | put_unaligned_be64(0xFFFFFFFFFFFFFFFFULL, &hdr->rsvd4[0]); | |
2515 | cmd->stat_sn = conn->stat_sn++; | |
2516 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2517 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2518 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2519 | hdr->async_event = ISCSI_ASYNC_MSG_DROPPING_CONNECTION; | |
2520 | hdr->param1 = cpu_to_be16(cmd->logout_cid); | |
2521 | hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait); | |
2522 | hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain); | |
2523 | ||
2524 | if (conn->conn_ops->HeaderDigest) { | |
2525 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2526 | ||
2527 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2528 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2529 | 0, NULL, (u8 *)header_digest); | |
2530 | ||
2531 | cmd->tx_size += ISCSI_CRC_LEN; | |
2532 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2533 | " Async Message 0x%08x\n", *header_digest); | |
2534 | } | |
2535 | ||
2536 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2537 | cmd->iov_misc[0].iov_len = cmd->tx_size; | |
2538 | cmd->iov_misc_count = 1; | |
2539 | ||
2540 | pr_debug("Sending Connection Dropped Async Message StatSN:" | |
2541 | " 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn, | |
2542 | cmd->logout_cid, conn->cid); | |
2543 | return 0; | |
2544 | } | |
2545 | ||
6f3c0e69 AG |
2546 | static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn) |
2547 | { | |
2548 | if ((conn->sock->sk->sk_shutdown & SEND_SHUTDOWN) || | |
2549 | (conn->sock->sk->sk_shutdown & RCV_SHUTDOWN)) { | |
2550 | wait_for_completion_interruptible_timeout( | |
2551 | &conn->tx_half_close_comp, | |
2552 | ISCSI_TX_THREAD_TCP_TIMEOUT * HZ); | |
2553 | } | |
2554 | } | |
2555 | ||
2ec5a8c1 NB |
2556 | static void |
2557 | iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2558 | struct iscsi_datain *datain, struct iscsi_data_rsp *hdr, | |
2559 | bool set_statsn) | |
e48354ce | 2560 | { |
2ec5a8c1 NB |
2561 | hdr->opcode = ISCSI_OP_SCSI_DATA_IN; |
2562 | hdr->flags = datain->flags; | |
2563 | if (hdr->flags & ISCSI_FLAG_DATA_STATUS) { | |
2564 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
2565 | hdr->flags |= ISCSI_FLAG_DATA_OVERFLOW; | |
2566 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2567 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { | |
2568 | hdr->flags |= ISCSI_FLAG_DATA_UNDERFLOW; | |
2569 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); | |
2570 | } | |
2571 | } | |
2572 | hton24(hdr->dlength, datain->length); | |
2573 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2574 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
2575 | (struct scsi_lun *)&hdr->lun); | |
2576 | else | |
2577 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2578 | ||
2579 | hdr->itt = cmd->init_task_tag; | |
2580 | ||
2581 | if (hdr->flags & ISCSI_FLAG_DATA_ACK) | |
2582 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2583 | else | |
2584 | hdr->ttt = cpu_to_be32(0xFFFFFFFF); | |
2585 | if (set_statsn) | |
2586 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2587 | else | |
2588 | hdr->statsn = cpu_to_be32(0xFFFFFFFF); | |
2589 | ||
2590 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2591 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2592 | hdr->datasn = cpu_to_be32(datain->data_sn); | |
2593 | hdr->offset = cpu_to_be32(datain->offset); | |
2594 | ||
2595 | pr_debug("Built DataIN ITT: 0x%08x, StatSN: 0x%08x," | |
2596 | " DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n", | |
2597 | cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn), | |
2598 | ntohl(hdr->offset), datain->length, conn->cid); | |
2599 | } | |
2600 | ||
2601 | static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2602 | { | |
2603 | struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0]; | |
e48354ce NB |
2604 | struct iscsi_datain datain; |
2605 | struct iscsi_datain_req *dr; | |
e48354ce | 2606 | struct kvec *iov; |
2ec5a8c1 NB |
2607 | u32 iov_count = 0, tx_size = 0; |
2608 | int eodr = 0, ret, iov_ret; | |
2609 | bool set_statsn = false; | |
e48354ce NB |
2610 | |
2611 | memset(&datain, 0, sizeof(struct iscsi_datain)); | |
2612 | dr = iscsit_get_datain_values(cmd, &datain); | |
2613 | if (!dr) { | |
2614 | pr_err("iscsit_get_datain_values failed for ITT: 0x%08x\n", | |
2615 | cmd->init_task_tag); | |
2616 | return -1; | |
2617 | } | |
e48354ce NB |
2618 | /* |
2619 | * Be paranoid and double check the logic for now. | |
2620 | */ | |
ebf1d95c | 2621 | if ((datain.offset + datain.length) > cmd->se_cmd.data_length) { |
e48354ce NB |
2622 | pr_err("Command ITT: 0x%08x, datain.offset: %u and" |
2623 | " datain.length: %u exceeds cmd->data_length: %u\n", | |
2624 | cmd->init_task_tag, datain.offset, datain.length, | |
2ec5a8c1 | 2625 | cmd->se_cmd.data_length); |
e48354ce NB |
2626 | return -1; |
2627 | } | |
2628 | ||
2629 | spin_lock_bh(&conn->sess->session_stats_lock); | |
2630 | conn->sess->tx_data_octets += datain.length; | |
2631 | if (conn->sess->se_sess->se_node_acl) { | |
2632 | spin_lock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
2633 | conn->sess->se_sess->se_node_acl->read_bytes += datain.length; | |
2634 | spin_unlock(&conn->sess->se_sess->se_node_acl->stats_lock); | |
2635 | } | |
2636 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
2637 | /* | |
2638 | * Special case for successfully execution w/ both DATAIN | |
2639 | * and Sense Data. | |
2640 | */ | |
2641 | if ((datain.flags & ISCSI_FLAG_DATA_STATUS) && | |
2642 | (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)) | |
2643 | datain.flags &= ~ISCSI_FLAG_DATA_STATUS; | |
2644 | else { | |
2645 | if ((dr->dr_complete == DATAIN_COMPLETE_NORMAL) || | |
2646 | (dr->dr_complete == DATAIN_COMPLETE_CONNECTION_RECOVERY)) { | |
2647 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2648 | cmd->stat_sn = conn->stat_sn++; | |
2ec5a8c1 | 2649 | set_statsn = true; |
e48354ce | 2650 | } else if (dr->dr_complete == |
2ec5a8c1 NB |
2651 | DATAIN_COMPLETE_WITHIN_COMMAND_RECOVERY) |
2652 | set_statsn = true; | |
e48354ce NB |
2653 | } |
2654 | ||
2ec5a8c1 | 2655 | iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn); |
e48354ce NB |
2656 | |
2657 | iov = &cmd->iov_data[0]; | |
2658 | iov[iov_count].iov_base = cmd->pdu; | |
2659 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
2660 | tx_size += ISCSI_HDR_LEN; | |
2661 | ||
2662 | if (conn->conn_ops->HeaderDigest) { | |
2663 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2664 | ||
2665 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2ec5a8c1 | 2666 | (unsigned char *)cmd->pdu, ISCSI_HDR_LEN, |
e48354ce NB |
2667 | 0, NULL, (u8 *)header_digest); |
2668 | ||
2669 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2670 | tx_size += ISCSI_CRC_LEN; | |
2671 | ||
2672 | pr_debug("Attaching CRC32 HeaderDigest" | |
2673 | " for DataIN PDU 0x%08x\n", *header_digest); | |
2674 | } | |
2675 | ||
2ec5a8c1 NB |
2676 | iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1], |
2677 | datain.offset, datain.length); | |
e48354ce NB |
2678 | if (iov_ret < 0) |
2679 | return -1; | |
2680 | ||
2681 | iov_count += iov_ret; | |
2682 | tx_size += datain.length; | |
2683 | ||
2684 | cmd->padding = ((-datain.length) & 3); | |
2685 | if (cmd->padding) { | |
2686 | iov[iov_count].iov_base = cmd->pad_bytes; | |
2687 | iov[iov_count++].iov_len = cmd->padding; | |
2688 | tx_size += cmd->padding; | |
2689 | ||
2690 | pr_debug("Attaching %u padding bytes\n", | |
2691 | cmd->padding); | |
2692 | } | |
2693 | if (conn->conn_ops->DataDigest) { | |
2694 | cmd->data_crc = iscsit_do_crypto_hash_sg(&conn->conn_tx_hash, cmd, | |
2695 | datain.offset, datain.length, cmd->padding, cmd->pad_bytes); | |
2696 | ||
2697 | iov[iov_count].iov_base = &cmd->data_crc; | |
2698 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
2699 | tx_size += ISCSI_CRC_LEN; | |
2700 | ||
2701 | pr_debug("Attached CRC32C DataDigest %d bytes, crc" | |
2702 | " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc); | |
2703 | } | |
2704 | ||
2705 | cmd->iov_data_count = iov_count; | |
2706 | cmd->tx_size = tx_size; | |
2707 | ||
6f3c0e69 AG |
2708 | /* sendpage is preferred but can't insert markers */ |
2709 | if (!conn->conn_ops->IFMarker) | |
2710 | ret = iscsit_fe_sendpage_sg(cmd, conn); | |
2711 | else | |
2712 | ret = iscsit_send_tx_data(cmd, conn, 0); | |
2713 | ||
2714 | iscsit_unmap_iovec(cmd); | |
2715 | ||
2716 | if (ret < 0) { | |
2717 | iscsit_tx_thread_wait_for_tcp(conn); | |
2718 | return ret; | |
2719 | } | |
2720 | ||
e48354ce | 2721 | if (dr->dr_complete) { |
6f3c0e69 | 2722 | eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ? |
e48354ce NB |
2723 | 2 : 1; |
2724 | iscsit_free_datain_req(cmd, dr); | |
2725 | } | |
2726 | ||
6f3c0e69 | 2727 | return eodr; |
e48354ce NB |
2728 | } |
2729 | ||
2ec5a8c1 NB |
2730 | int |
2731 | iscsit_build_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2732 | struct iscsi_logout_rsp *hdr) | |
e48354ce | 2733 | { |
e48354ce NB |
2734 | struct iscsi_conn *logout_conn = NULL; |
2735 | struct iscsi_conn_recovery *cr = NULL; | |
2736 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
2737 | /* |
2738 | * The actual shutting down of Sessions and/or Connections | |
2739 | * for CLOSESESSION and CLOSECONNECTION Logout Requests | |
2740 | * is done in scsi_logout_post_handler(). | |
2741 | */ | |
2742 | switch (cmd->logout_reason) { | |
2743 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
2744 | pr_debug("iSCSI session logout successful, setting" | |
2745 | " logout response to ISCSI_LOGOUT_SUCCESS.\n"); | |
2746 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2747 | break; | |
2748 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
2749 | if (cmd->logout_response == ISCSI_LOGOUT_CID_NOT_FOUND) | |
2750 | break; | |
2751 | /* | |
2752 | * For CLOSECONNECTION logout requests carrying | |
2753 | * a matching logout CID -> local CID, the reference | |
2754 | * for the local CID will have been incremented in | |
2755 | * iscsi_logout_closeconnection(). | |
2756 | * | |
2757 | * For CLOSECONNECTION logout requests carrying | |
2758 | * a different CID than the connection it arrived | |
2759 | * on, the connection responding to cmd->logout_cid | |
2760 | * is stopped in iscsit_logout_post_handler_diffcid(). | |
2761 | */ | |
2762 | ||
2763 | pr_debug("iSCSI CID: %hu logout on CID: %hu" | |
2764 | " successful.\n", cmd->logout_cid, conn->cid); | |
2765 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2766 | break; | |
2767 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
2768 | if ((cmd->logout_response == ISCSI_LOGOUT_RECOVERY_UNSUPPORTED) || | |
2769 | (cmd->logout_response == ISCSI_LOGOUT_CLEANUP_FAILED)) | |
2770 | break; | |
2771 | /* | |
2772 | * If the connection is still active from our point of view | |
2773 | * force connection recovery to occur. | |
2774 | */ | |
2775 | logout_conn = iscsit_get_conn_from_cid_rcfr(sess, | |
2776 | cmd->logout_cid); | |
ee1b1b9c | 2777 | if (logout_conn) { |
e48354ce NB |
2778 | iscsit_connection_reinstatement_rcfr(logout_conn); |
2779 | iscsit_dec_conn_usage_count(logout_conn); | |
2780 | } | |
2781 | ||
2782 | cr = iscsit_get_inactive_connection_recovery_entry( | |
2783 | conn->sess, cmd->logout_cid); | |
2784 | if (!cr) { | |
2785 | pr_err("Unable to locate CID: %hu for" | |
2786 | " REMOVECONNFORRECOVERY Logout Request.\n", | |
2787 | cmd->logout_cid); | |
2788 | cmd->logout_response = ISCSI_LOGOUT_CID_NOT_FOUND; | |
2789 | break; | |
2790 | } | |
2791 | ||
2792 | iscsit_discard_cr_cmds_by_expstatsn(cr, cmd->exp_stat_sn); | |
2793 | ||
2794 | pr_debug("iSCSI REMOVECONNFORRECOVERY logout" | |
2795 | " for recovery for CID: %hu on CID: %hu successful.\n", | |
2796 | cmd->logout_cid, conn->cid); | |
2797 | cmd->logout_response = ISCSI_LOGOUT_SUCCESS; | |
2798 | break; | |
2799 | default: | |
2800 | pr_err("Unknown cmd->logout_reason: 0x%02x\n", | |
2801 | cmd->logout_reason); | |
2802 | return -1; | |
2803 | } | |
2804 | ||
e48354ce NB |
2805 | hdr->opcode = ISCSI_OP_LOGOUT_RSP; |
2806 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2807 | hdr->response = cmd->logout_response; | |
66c7db68 | 2808 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
2809 | cmd->stat_sn = conn->stat_sn++; |
2810 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2811 | ||
2812 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2813 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2814 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2815 | ||
2ec5a8c1 NB |
2816 | pr_debug("Built Logout Response ITT: 0x%08x StatSN:" |
2817 | " 0x%08x Response: 0x%02x CID: %hu on CID: %hu\n", | |
2818 | cmd->init_task_tag, cmd->stat_sn, hdr->response, | |
2819 | cmd->logout_cid, conn->cid); | |
2820 | ||
2821 | return 0; | |
2822 | } | |
2823 | EXPORT_SYMBOL(iscsit_build_logout_rsp); | |
2824 | ||
2825 | static int | |
2826 | iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
2827 | { | |
2828 | struct kvec *iov; | |
2829 | int niov = 0, tx_size, rc; | |
2830 | ||
2831 | rc = iscsit_build_logout_rsp(cmd, conn, | |
2832 | (struct iscsi_logout_rsp *)&cmd->pdu[0]); | |
2833 | if (rc < 0) | |
2834 | return rc; | |
2835 | ||
2836 | tx_size = ISCSI_HDR_LEN; | |
e48354ce NB |
2837 | iov = &cmd->iov_misc[0]; |
2838 | iov[niov].iov_base = cmd->pdu; | |
2839 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2840 | ||
2841 | if (conn->conn_ops->HeaderDigest) { | |
2842 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2843 | ||
2844 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2ec5a8c1 | 2845 | (unsigned char *)&cmd->pdu[0], ISCSI_HDR_LEN, |
e48354ce NB |
2846 | 0, NULL, (u8 *)header_digest); |
2847 | ||
2848 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2849 | tx_size += ISCSI_CRC_LEN; | |
2850 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2851 | " Logout Response 0x%08x\n", *header_digest); | |
2852 | } | |
2853 | cmd->iov_misc_count = niov; | |
2854 | cmd->tx_size = tx_size; | |
2855 | ||
e48354ce NB |
2856 | return 0; |
2857 | } | |
2858 | ||
2ec5a8c1 NB |
2859 | void |
2860 | iscsit_build_nopin_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
2861 | struct iscsi_nopin *hdr, bool nopout_response) | |
2862 | { | |
2863 | hdr->opcode = ISCSI_OP_NOOP_IN; | |
2864 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
2865 | hton24(hdr->dlength, cmd->buf_ptr_size); | |
2866 | if (nopout_response) | |
2867 | put_unaligned_le64(0xFFFFFFFFFFFFFFFFULL, &hdr->lun); | |
2868 | hdr->itt = cmd->init_task_tag; | |
2869 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); | |
2870 | cmd->stat_sn = (nopout_response) ? conn->stat_sn++ : | |
2871 | conn->stat_sn; | |
2872 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
2873 | ||
2874 | if (nopout_response) | |
2875 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
2876 | ||
2877 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
2878 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
2879 | ||
2880 | pr_debug("Built NOPIN %s Response ITT: 0x%08x, TTT: 0x%08x," | |
2881 | " StatSN: 0x%08x, Length %u\n", (nopout_response) ? | |
2882 | "Solicitied" : "Unsolicitied", cmd->init_task_tag, | |
2883 | cmd->targ_xfer_tag, cmd->stat_sn, cmd->buf_ptr_size); | |
2884 | } | |
2885 | EXPORT_SYMBOL(iscsit_build_nopin_rsp); | |
2886 | ||
e48354ce NB |
2887 | /* |
2888 | * Unsolicited NOPIN, either requesting a response or not. | |
2889 | */ | |
2890 | static int iscsit_send_unsolicited_nopin( | |
2891 | struct iscsi_cmd *cmd, | |
2892 | struct iscsi_conn *conn, | |
2893 | int want_response) | |
2894 | { | |
2ec5a8c1 NB |
2895 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
2896 | int tx_size = ISCSI_HDR_LEN, ret; | |
e48354ce | 2897 | |
2ec5a8c1 | 2898 | iscsit_build_nopin_rsp(cmd, conn, hdr, false); |
e48354ce NB |
2899 | |
2900 | if (conn->conn_ops->HeaderDigest) { | |
2901 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2902 | ||
2903 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2904 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2905 | 0, NULL, (u8 *)header_digest); | |
2906 | ||
2907 | tx_size += ISCSI_CRC_LEN; | |
2908 | pr_debug("Attaching CRC32C HeaderDigest to" | |
2909 | " NopIN 0x%08x\n", *header_digest); | |
2910 | } | |
2911 | ||
2912 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
2913 | cmd->iov_misc[0].iov_len = tx_size; | |
2914 | cmd->iov_misc_count = 1; | |
2915 | cmd->tx_size = tx_size; | |
2916 | ||
2917 | pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:" | |
2918 | " 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid); | |
2919 | ||
6f3c0e69 AG |
2920 | ret = iscsit_send_tx_data(cmd, conn, 1); |
2921 | if (ret < 0) { | |
2922 | iscsit_tx_thread_wait_for_tcp(conn); | |
2923 | return ret; | |
2924 | } | |
2925 | ||
2926 | spin_lock_bh(&cmd->istate_lock); | |
2927 | cmd->i_state = want_response ? | |
2928 | ISTATE_SENT_NOPIN_WANT_RESPONSE : ISTATE_SENT_STATUS; | |
2929 | spin_unlock_bh(&cmd->istate_lock); | |
2930 | ||
e48354ce NB |
2931 | return 0; |
2932 | } | |
2933 | ||
2ec5a8c1 NB |
2934 | static int |
2935 | iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
e48354ce | 2936 | { |
2ec5a8c1 | 2937 | struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0]; |
e48354ce | 2938 | struct kvec *iov; |
2ec5a8c1 NB |
2939 | u32 padding = 0; |
2940 | int niov = 0, tx_size; | |
e48354ce | 2941 | |
2ec5a8c1 | 2942 | iscsit_build_nopin_rsp(cmd, conn, hdr, true); |
e48354ce | 2943 | |
2ec5a8c1 | 2944 | tx_size = ISCSI_HDR_LEN; |
e48354ce NB |
2945 | iov = &cmd->iov_misc[0]; |
2946 | iov[niov].iov_base = cmd->pdu; | |
2947 | iov[niov++].iov_len = ISCSI_HDR_LEN; | |
2948 | ||
2949 | if (conn->conn_ops->HeaderDigest) { | |
2950 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
2951 | ||
2952 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2953 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
2954 | 0, NULL, (u8 *)header_digest); | |
2955 | ||
2956 | iov[0].iov_len += ISCSI_CRC_LEN; | |
2957 | tx_size += ISCSI_CRC_LEN; | |
2958 | pr_debug("Attaching CRC32C HeaderDigest" | |
2959 | " to NopIn 0x%08x\n", *header_digest); | |
2960 | } | |
2961 | ||
2962 | /* | |
2963 | * NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr. | |
2964 | * NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size. | |
2965 | */ | |
2966 | if (cmd->buf_ptr_size) { | |
2967 | iov[niov].iov_base = cmd->buf_ptr; | |
2968 | iov[niov++].iov_len = cmd->buf_ptr_size; | |
2969 | tx_size += cmd->buf_ptr_size; | |
2970 | ||
2971 | pr_debug("Echoing back %u bytes of ping" | |
2972 | " data.\n", cmd->buf_ptr_size); | |
2973 | ||
2974 | padding = ((-cmd->buf_ptr_size) & 3); | |
2975 | if (padding != 0) { | |
2976 | iov[niov].iov_base = &cmd->pad_bytes; | |
2977 | iov[niov++].iov_len = padding; | |
2978 | tx_size += padding; | |
2979 | pr_debug("Attaching %u additional" | |
2980 | " padding bytes.\n", padding); | |
2981 | } | |
2982 | if (conn->conn_ops->DataDigest) { | |
2983 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2984 | cmd->buf_ptr, cmd->buf_ptr_size, | |
2985 | padding, (u8 *)&cmd->pad_bytes, | |
2986 | (u8 *)&cmd->data_crc); | |
2987 | ||
2988 | iov[niov].iov_base = &cmd->data_crc; | |
2989 | iov[niov++].iov_len = ISCSI_CRC_LEN; | |
2990 | tx_size += ISCSI_CRC_LEN; | |
2991 | pr_debug("Attached DataDigest for %u" | |
2992 | " bytes of ping data, CRC 0x%08x\n", | |
2993 | cmd->buf_ptr_size, cmd->data_crc); | |
2994 | } | |
2995 | } | |
2996 | ||
2997 | cmd->iov_misc_count = niov; | |
2998 | cmd->tx_size = tx_size; | |
2999 | ||
e48354ce NB |
3000 | return 0; |
3001 | } | |
3002 | ||
6f3c0e69 | 3003 | static int iscsit_send_r2t( |
e48354ce NB |
3004 | struct iscsi_cmd *cmd, |
3005 | struct iscsi_conn *conn) | |
3006 | { | |
3007 | int tx_size = 0; | |
3008 | struct iscsi_r2t *r2t; | |
3009 | struct iscsi_r2t_rsp *hdr; | |
6f3c0e69 | 3010 | int ret; |
e48354ce NB |
3011 | |
3012 | r2t = iscsit_get_r2t_from_list(cmd); | |
3013 | if (!r2t) | |
3014 | return -1; | |
3015 | ||
3016 | hdr = (struct iscsi_r2t_rsp *) cmd->pdu; | |
3017 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3018 | hdr->opcode = ISCSI_OP_R2T; | |
3019 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3020 | int_to_scsilun(cmd->se_cmd.orig_fe_lun, | |
3021 | (struct scsi_lun *)&hdr->lun); | |
66c7db68 | 3022 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3023 | spin_lock_bh(&conn->sess->ttt_lock); |
3024 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
3025 | if (r2t->targ_xfer_tag == 0xFFFFFFFF) | |
3026 | r2t->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
3027 | spin_unlock_bh(&conn->sess->ttt_lock); | |
3028 | hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag); | |
3029 | hdr->statsn = cpu_to_be32(conn->stat_sn); | |
3030 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3031 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3032 | hdr->r2tsn = cpu_to_be32(r2t->r2t_sn); | |
3033 | hdr->data_offset = cpu_to_be32(r2t->offset); | |
3034 | hdr->data_length = cpu_to_be32(r2t->xfer_len); | |
3035 | ||
3036 | cmd->iov_misc[0].iov_base = cmd->pdu; | |
3037 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3038 | tx_size += ISCSI_HDR_LEN; | |
3039 | ||
3040 | if (conn->conn_ops->HeaderDigest) { | |
3041 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3042 | ||
3043 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3044 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3045 | 0, NULL, (u8 *)header_digest); | |
3046 | ||
3047 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3048 | tx_size += ISCSI_CRC_LEN; | |
3049 | pr_debug("Attaching CRC32 HeaderDigest for R2T" | |
3050 | " PDU 0x%08x\n", *header_digest); | |
3051 | } | |
3052 | ||
3053 | pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:" | |
3054 | " 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n", | |
3055 | (!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag, | |
3056 | r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn, | |
3057 | r2t->offset, r2t->xfer_len, conn->cid); | |
3058 | ||
3059 | cmd->iov_misc_count = 1; | |
3060 | cmd->tx_size = tx_size; | |
3061 | ||
3062 | spin_lock_bh(&cmd->r2t_lock); | |
3063 | r2t->sent_r2t = 1; | |
3064 | spin_unlock_bh(&cmd->r2t_lock); | |
3065 | ||
6f3c0e69 AG |
3066 | ret = iscsit_send_tx_data(cmd, conn, 1); |
3067 | if (ret < 0) { | |
3068 | iscsit_tx_thread_wait_for_tcp(conn); | |
3069 | return ret; | |
3070 | } | |
3071 | ||
3072 | spin_lock_bh(&cmd->dataout_timeout_lock); | |
3073 | iscsit_start_dataout_timer(cmd, conn); | |
3074 | spin_unlock_bh(&cmd->dataout_timeout_lock); | |
3075 | ||
e48354ce NB |
3076 | return 0; |
3077 | } | |
3078 | ||
3079 | /* | |
8b1e1244 AG |
3080 | * @recovery: If called from iscsi_task_reassign_complete_write() for |
3081 | * connection recovery. | |
e48354ce NB |
3082 | */ |
3083 | int iscsit_build_r2ts_for_cmd( | |
e48354ce | 3084 | struct iscsi_conn *conn, |
3e1c81a9 | 3085 | struct iscsi_cmd *cmd, |
8b1e1244 | 3086 | bool recovery) |
e48354ce NB |
3087 | { |
3088 | int first_r2t = 1; | |
3089 | u32 offset = 0, xfer_len = 0; | |
3090 | ||
3091 | spin_lock_bh(&cmd->r2t_lock); | |
3092 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) { | |
3093 | spin_unlock_bh(&cmd->r2t_lock); | |
3094 | return 0; | |
3095 | } | |
3096 | ||
8b1e1244 AG |
3097 | if (conn->sess->sess_ops->DataSequenceInOrder && |
3098 | !recovery) | |
c6037cc5 | 3099 | cmd->r2t_offset = max(cmd->r2t_offset, cmd->write_data_done); |
e48354ce NB |
3100 | |
3101 | while (cmd->outstanding_r2ts < conn->sess->sess_ops->MaxOutstandingR2T) { | |
3102 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
3103 | offset = cmd->r2t_offset; | |
3104 | ||
8b1e1244 AG |
3105 | if (first_r2t && recovery) { |
3106 | int new_data_end = offset + | |
3107 | conn->sess->sess_ops->MaxBurstLength - | |
3108 | cmd->next_burst_len; | |
3109 | ||
ebf1d95c AG |
3110 | if (new_data_end > cmd->se_cmd.data_length) |
3111 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3112 | else |
3113 | xfer_len = | |
3114 | conn->sess->sess_ops->MaxBurstLength - | |
3115 | cmd->next_burst_len; | |
e48354ce | 3116 | } else { |
8b1e1244 AG |
3117 | int new_data_end = offset + |
3118 | conn->sess->sess_ops->MaxBurstLength; | |
3119 | ||
ebf1d95c AG |
3120 | if (new_data_end > cmd->se_cmd.data_length) |
3121 | xfer_len = cmd->se_cmd.data_length - offset; | |
8b1e1244 AG |
3122 | else |
3123 | xfer_len = conn->sess->sess_ops->MaxBurstLength; | |
e48354ce NB |
3124 | } |
3125 | cmd->r2t_offset += xfer_len; | |
3126 | ||
ebf1d95c | 3127 | if (cmd->r2t_offset == cmd->se_cmd.data_length) |
e48354ce NB |
3128 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; |
3129 | } else { | |
3130 | struct iscsi_seq *seq; | |
3131 | ||
3132 | seq = iscsit_get_seq_holder_for_r2t(cmd); | |
3133 | if (!seq) { | |
3134 | spin_unlock_bh(&cmd->r2t_lock); | |
3135 | return -1; | |
3136 | } | |
3137 | ||
3138 | offset = seq->offset; | |
3139 | xfer_len = seq->xfer_len; | |
3140 | ||
3141 | if (cmd->seq_send_order == cmd->seq_count) | |
3142 | cmd->cmd_flags |= ICF_SENT_LAST_R2T; | |
3143 | } | |
3144 | cmd->outstanding_r2ts++; | |
3145 | first_r2t = 0; | |
3146 | ||
3147 | if (iscsit_add_r2t_to_list(cmd, offset, xfer_len, 0, 0) < 0) { | |
3148 | spin_unlock_bh(&cmd->r2t_lock); | |
3149 | return -1; | |
3150 | } | |
3151 | ||
3152 | if (cmd->cmd_flags & ICF_SENT_LAST_R2T) | |
3153 | break; | |
3154 | } | |
3155 | spin_unlock_bh(&cmd->r2t_lock); | |
3156 | ||
3157 | return 0; | |
3158 | } | |
3159 | ||
2ec5a8c1 NB |
3160 | void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn, |
3161 | bool inc_stat_sn, struct iscsi_scsi_rsp *hdr) | |
e48354ce | 3162 | { |
2ec5a8c1 | 3163 | if (inc_stat_sn) |
e48354ce NB |
3164 | cmd->stat_sn = conn->stat_sn++; |
3165 | ||
3166 | spin_lock_bh(&conn->sess->session_stats_lock); | |
3167 | conn->sess->rsp_pdus++; | |
3168 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
3169 | ||
e48354ce NB |
3170 | memset(hdr, 0, ISCSI_HDR_LEN); |
3171 | hdr->opcode = ISCSI_OP_SCSI_CMD_RSP; | |
3172 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3173 | if (cmd->se_cmd.se_cmd_flags & SCF_OVERFLOW_BIT) { | |
3174 | hdr->flags |= ISCSI_FLAG_CMD_OVERFLOW; | |
7e46cf02 | 3175 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3176 | } else if (cmd->se_cmd.se_cmd_flags & SCF_UNDERFLOW_BIT) { |
3177 | hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; | |
7e46cf02 | 3178 | hdr->residual_count = cpu_to_be32(cmd->se_cmd.residual_count); |
e48354ce NB |
3179 | } |
3180 | hdr->response = cmd->iscsi_response; | |
3181 | hdr->cmd_status = cmd->se_cmd.scsi_status; | |
66c7db68 | 3182 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3183 | hdr->statsn = cpu_to_be32(cmd->stat_sn); |
3184 | ||
3185 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3186 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3187 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3188 | ||
2ec5a8c1 NB |
3189 | pr_debug("Built SCSI Response, ITT: 0x%08x, StatSN: 0x%08x," |
3190 | " Response: 0x%02x, SAM Status: 0x%02x, CID: %hu\n", | |
3191 | cmd->init_task_tag, cmd->stat_sn, cmd->se_cmd.scsi_status, | |
3192 | cmd->se_cmd.scsi_status, conn->cid); | |
3193 | } | |
3194 | EXPORT_SYMBOL(iscsit_build_rsp_pdu); | |
3195 | ||
3196 | static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3197 | { | |
3198 | struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0]; | |
3199 | struct kvec *iov; | |
3200 | u32 padding = 0, tx_size = 0; | |
3201 | int iov_count = 0; | |
3202 | bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS); | |
3203 | ||
3204 | iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr); | |
3205 | ||
e48354ce NB |
3206 | iov = &cmd->iov_misc[0]; |
3207 | iov[iov_count].iov_base = cmd->pdu; | |
3208 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3209 | tx_size += ISCSI_HDR_LEN; | |
3210 | ||
3211 | /* | |
3212 | * Attach SENSE DATA payload to iSCSI Response PDU | |
3213 | */ | |
3214 | if (cmd->se_cmd.sense_buffer && | |
3215 | ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || | |
3216 | (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { | |
9c58b7dd RD |
3217 | put_unaligned_be16(cmd->se_cmd.scsi_sense_length, cmd->sense_buffer); |
3218 | cmd->se_cmd.scsi_sense_length += sizeof (__be16); | |
3219 | ||
e48354ce | 3220 | padding = -(cmd->se_cmd.scsi_sense_length) & 3; |
50e5c87d | 3221 | hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); |
9c58b7dd | 3222 | iov[iov_count].iov_base = cmd->sense_buffer; |
e48354ce NB |
3223 | iov[iov_count++].iov_len = |
3224 | (cmd->se_cmd.scsi_sense_length + padding); | |
3225 | tx_size += cmd->se_cmd.scsi_sense_length; | |
3226 | ||
3227 | if (padding) { | |
9c58b7dd | 3228 | memset(cmd->sense_buffer + |
e48354ce NB |
3229 | cmd->se_cmd.scsi_sense_length, 0, padding); |
3230 | tx_size += padding; | |
3231 | pr_debug("Adding %u bytes of padding to" | |
3232 | " SENSE.\n", padding); | |
3233 | } | |
3234 | ||
3235 | if (conn->conn_ops->DataDigest) { | |
3236 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
9c58b7dd | 3237 | cmd->sense_buffer, |
e48354ce NB |
3238 | (cmd->se_cmd.scsi_sense_length + padding), |
3239 | 0, NULL, (u8 *)&cmd->data_crc); | |
3240 | ||
3241 | iov[iov_count].iov_base = &cmd->data_crc; | |
3242 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3243 | tx_size += ISCSI_CRC_LEN; | |
3244 | ||
3245 | pr_debug("Attaching CRC32 DataDigest for" | |
3246 | " SENSE, %u bytes CRC 0x%08x\n", | |
3247 | (cmd->se_cmd.scsi_sense_length + padding), | |
3248 | cmd->data_crc); | |
3249 | } | |
3250 | ||
3251 | pr_debug("Attaching SENSE DATA: %u bytes to iSCSI" | |
3252 | " Response PDU\n", | |
3253 | cmd->se_cmd.scsi_sense_length); | |
3254 | } | |
3255 | ||
3256 | if (conn->conn_ops->HeaderDigest) { | |
3257 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3258 | ||
3259 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
2ec5a8c1 | 3260 | (unsigned char *)cmd->pdu, ISCSI_HDR_LEN, |
e48354ce NB |
3261 | 0, NULL, (u8 *)header_digest); |
3262 | ||
3263 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3264 | tx_size += ISCSI_CRC_LEN; | |
3265 | pr_debug("Attaching CRC32 HeaderDigest for Response" | |
3266 | " PDU 0x%08x\n", *header_digest); | |
3267 | } | |
3268 | ||
3269 | cmd->iov_misc_count = iov_count; | |
3270 | cmd->tx_size = tx_size; | |
3271 | ||
e48354ce NB |
3272 | return 0; |
3273 | } | |
3274 | ||
3275 | static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr) | |
3276 | { | |
3277 | switch (se_tmr->response) { | |
3278 | case TMR_FUNCTION_COMPLETE: | |
3279 | return ISCSI_TMF_RSP_COMPLETE; | |
3280 | case TMR_TASK_DOES_NOT_EXIST: | |
3281 | return ISCSI_TMF_RSP_NO_TASK; | |
3282 | case TMR_LUN_DOES_NOT_EXIST: | |
3283 | return ISCSI_TMF_RSP_NO_LUN; | |
3284 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
3285 | return ISCSI_TMF_RSP_NOT_SUPPORTED; | |
3286 | case TMR_FUNCTION_AUTHORIZATION_FAILED: | |
3287 | return ISCSI_TMF_RSP_AUTH_FAILED; | |
3288 | case TMR_FUNCTION_REJECTED: | |
3289 | default: | |
3290 | return ISCSI_TMF_RSP_REJECTED; | |
3291 | } | |
3292 | } | |
3293 | ||
2ec5a8c1 NB |
3294 | void |
3295 | iscsit_build_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3296 | struct iscsi_tm_rsp *hdr) | |
e48354ce NB |
3297 | { |
3298 | struct se_tmr_req *se_tmr = cmd->se_cmd.se_tmr_req; | |
e48354ce | 3299 | |
e48354ce | 3300 | hdr->opcode = ISCSI_OP_SCSI_TMFUNC_RSP; |
7ae0b103 | 3301 | hdr->flags = ISCSI_FLAG_CMD_FINAL; |
e48354ce | 3302 | hdr->response = iscsit_convert_tcm_tmr_rsp(se_tmr); |
66c7db68 | 3303 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3304 | cmd->stat_sn = conn->stat_sn++; |
3305 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3306 | ||
3307 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3308 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3309 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3310 | ||
2ec5a8c1 NB |
3311 | pr_debug("Built Task Management Response ITT: 0x%08x," |
3312 | " StatSN: 0x%08x, Response: 0x%02x, CID: %hu\n", | |
3313 | cmd->init_task_tag, cmd->stat_sn, hdr->response, conn->cid); | |
3314 | } | |
3315 | EXPORT_SYMBOL(iscsit_build_task_mgt_rsp); | |
3316 | ||
3317 | static int | |
3318 | iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) | |
3319 | { | |
3320 | struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0]; | |
3321 | u32 tx_size = 0; | |
3322 | ||
3323 | iscsit_build_task_mgt_rsp(cmd, conn, hdr); | |
3324 | ||
e48354ce NB |
3325 | cmd->iov_misc[0].iov_base = cmd->pdu; |
3326 | cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN; | |
3327 | tx_size += ISCSI_HDR_LEN; | |
3328 | ||
3329 | if (conn->conn_ops->HeaderDigest) { | |
3330 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3331 | ||
3332 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3333 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3334 | 0, NULL, (u8 *)header_digest); | |
3335 | ||
3336 | cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN; | |
3337 | tx_size += ISCSI_CRC_LEN; | |
3338 | pr_debug("Attaching CRC32 HeaderDigest for Task" | |
3339 | " Mgmt Response PDU 0x%08x\n", *header_digest); | |
3340 | } | |
3341 | ||
3342 | cmd->iov_misc_count = 1; | |
3343 | cmd->tx_size = tx_size; | |
3344 | ||
e48354ce NB |
3345 | return 0; |
3346 | } | |
3347 | ||
2f9bc894 NB |
3348 | static bool iscsit_check_inaddr_any(struct iscsi_np *np) |
3349 | { | |
3350 | bool ret = false; | |
3351 | ||
3352 | if (np->np_sockaddr.ss_family == AF_INET6) { | |
3353 | const struct sockaddr_in6 sin6 = { | |
3354 | .sin6_addr = IN6ADDR_ANY_INIT }; | |
3355 | struct sockaddr_in6 *sock_in6 = | |
3356 | (struct sockaddr_in6 *)&np->np_sockaddr; | |
3357 | ||
3358 | if (!memcmp(sock_in6->sin6_addr.s6_addr, | |
3359 | sin6.sin6_addr.s6_addr, 16)) | |
3360 | ret = true; | |
3361 | } else { | |
3362 | struct sockaddr_in * sock_in = | |
3363 | (struct sockaddr_in *)&np->np_sockaddr; | |
3364 | ||
cea0b4ce | 3365 | if (sock_in->sin_addr.s_addr == htonl(INADDR_ANY)) |
2f9bc894 NB |
3366 | ret = true; |
3367 | } | |
3368 | ||
3369 | return ret; | |
3370 | } | |
3371 | ||
8b1e1244 AG |
3372 | #define SENDTARGETS_BUF_LIMIT 32768U |
3373 | ||
e48354ce NB |
3374 | static int iscsit_build_sendtargets_response(struct iscsi_cmd *cmd) |
3375 | { | |
3376 | char *payload = NULL; | |
3377 | struct iscsi_conn *conn = cmd->conn; | |
3378 | struct iscsi_portal_group *tpg; | |
3379 | struct iscsi_tiqn *tiqn; | |
3380 | struct iscsi_tpg_np *tpg_np; | |
3381 | int buffer_len, end_of_buf = 0, len = 0, payload_len = 0; | |
8b1e1244 | 3382 | unsigned char buf[ISCSI_IQN_LEN+12]; /* iqn + "TargetName=" + \0 */ |
e48354ce | 3383 | |
8b1e1244 AG |
3384 | buffer_len = max(conn->conn_ops->MaxRecvDataSegmentLength, |
3385 | SENDTARGETS_BUF_LIMIT); | |
e48354ce NB |
3386 | |
3387 | payload = kzalloc(buffer_len, GFP_KERNEL); | |
3388 | if (!payload) { | |
3389 | pr_err("Unable to allocate memory for sendtargets" | |
3390 | " response.\n"); | |
3391 | return -ENOMEM; | |
3392 | } | |
3393 | ||
3394 | spin_lock(&tiqn_lock); | |
3395 | list_for_each_entry(tiqn, &g_tiqn_list, tiqn_list) { | |
3396 | len = sprintf(buf, "TargetName=%s", tiqn->tiqn); | |
3397 | len += 1; | |
3398 | ||
3399 | if ((len + payload_len) > buffer_len) { | |
e48354ce NB |
3400 | end_of_buf = 1; |
3401 | goto eob; | |
3402 | } | |
8359cf43 | 3403 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3404 | payload_len += len; |
3405 | ||
3406 | spin_lock(&tiqn->tiqn_tpg_lock); | |
3407 | list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) { | |
3408 | ||
3409 | spin_lock(&tpg->tpg_state_lock); | |
3410 | if ((tpg->tpg_state == TPG_STATE_FREE) || | |
3411 | (tpg->tpg_state == TPG_STATE_INACTIVE)) { | |
3412 | spin_unlock(&tpg->tpg_state_lock); | |
3413 | continue; | |
3414 | } | |
3415 | spin_unlock(&tpg->tpg_state_lock); | |
3416 | ||
3417 | spin_lock(&tpg->tpg_np_lock); | |
3418 | list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, | |
3419 | tpg_np_list) { | |
2f9bc894 NB |
3420 | struct iscsi_np *np = tpg_np->tpg_np; |
3421 | bool inaddr_any = iscsit_check_inaddr_any(np); | |
3422 | ||
e48354ce NB |
3423 | len = sprintf(buf, "TargetAddress=" |
3424 | "%s%s%s:%hu,%hu", | |
2f9bc894 NB |
3425 | (np->np_sockaddr.ss_family == AF_INET6) ? |
3426 | "[" : "", (inaddr_any == false) ? | |
3427 | np->np_ip : conn->local_ip, | |
3428 | (np->np_sockaddr.ss_family == AF_INET6) ? | |
3429 | "]" : "", (inaddr_any == false) ? | |
3430 | np->np_port : conn->local_port, | |
e48354ce NB |
3431 | tpg->tpgt); |
3432 | len += 1; | |
3433 | ||
3434 | if ((len + payload_len) > buffer_len) { | |
3435 | spin_unlock(&tpg->tpg_np_lock); | |
3436 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3437 | end_of_buf = 1; | |
3438 | goto eob; | |
3439 | } | |
8359cf43 | 3440 | memcpy(payload + payload_len, buf, len); |
e48354ce NB |
3441 | payload_len += len; |
3442 | } | |
3443 | spin_unlock(&tpg->tpg_np_lock); | |
3444 | } | |
3445 | spin_unlock(&tiqn->tiqn_tpg_lock); | |
3446 | eob: | |
3447 | if (end_of_buf) | |
3448 | break; | |
3449 | } | |
3450 | spin_unlock(&tiqn_lock); | |
3451 | ||
3452 | cmd->buf_ptr = payload; | |
3453 | ||
3454 | return payload_len; | |
3455 | } | |
3456 | ||
3457 | /* | |
3458 | * FIXME: Add support for F_BIT and C_BIT when the length is longer than | |
3459 | * MaxRecvDataSegmentLength. | |
3460 | */ | |
3461 | static int iscsit_send_text_rsp( | |
3462 | struct iscsi_cmd *cmd, | |
3463 | struct iscsi_conn *conn) | |
3464 | { | |
3465 | struct iscsi_text_rsp *hdr; | |
3466 | struct kvec *iov; | |
3467 | u32 padding = 0, tx_size = 0; | |
3468 | int text_length, iov_count = 0; | |
3469 | ||
3470 | text_length = iscsit_build_sendtargets_response(cmd); | |
3471 | if (text_length < 0) | |
3472 | return text_length; | |
3473 | ||
3474 | padding = ((-text_length) & 3); | |
3475 | if (padding != 0) { | |
3476 | memset(cmd->buf_ptr + text_length, 0, padding); | |
3477 | pr_debug("Attaching %u additional bytes for" | |
3478 | " padding.\n", padding); | |
3479 | } | |
3480 | ||
3481 | hdr = (struct iscsi_text_rsp *) cmd->pdu; | |
3482 | memset(hdr, 0, ISCSI_HDR_LEN); | |
3483 | hdr->opcode = ISCSI_OP_TEXT_RSP; | |
3484 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3485 | hton24(hdr->dlength, text_length); | |
66c7db68 | 3486 | hdr->itt = cmd->init_task_tag; |
e48354ce NB |
3487 | hdr->ttt = cpu_to_be32(cmd->targ_xfer_tag); |
3488 | cmd->stat_sn = conn->stat_sn++; | |
3489 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3490 | ||
3491 | iscsit_increment_maxcmdsn(cmd, conn->sess); | |
3492 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3493 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3494 | ||
3495 | iov = &cmd->iov_misc[0]; | |
3496 | ||
3497 | iov[iov_count].iov_base = cmd->pdu; | |
3498 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3499 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3500 | iov[iov_count++].iov_len = text_length + padding; | |
3501 | ||
3502 | tx_size += (ISCSI_HDR_LEN + text_length + padding); | |
3503 | ||
3504 | if (conn->conn_ops->HeaderDigest) { | |
3505 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3506 | ||
3507 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3508 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3509 | 0, NULL, (u8 *)header_digest); | |
3510 | ||
3511 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3512 | tx_size += ISCSI_CRC_LEN; | |
3513 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3514 | " Text Response PDU 0x%08x\n", *header_digest); | |
3515 | } | |
3516 | ||
3517 | if (conn->conn_ops->DataDigest) { | |
3518 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3519 | cmd->buf_ptr, (text_length + padding), | |
3520 | 0, NULL, (u8 *)&cmd->data_crc); | |
3521 | ||
3522 | iov[iov_count].iov_base = &cmd->data_crc; | |
3523 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3524 | tx_size += ISCSI_CRC_LEN; | |
3525 | ||
3526 | pr_debug("Attaching DataDigest for %u bytes of text" | |
3527 | " data, CRC 0x%08x\n", (text_length + padding), | |
3528 | cmd->data_crc); | |
3529 | } | |
3530 | ||
3531 | cmd->iov_misc_count = iov_count; | |
3532 | cmd->tx_size = tx_size; | |
3533 | ||
3534 | pr_debug("Built Text Response: ITT: 0x%08x, StatSN: 0x%08x," | |
3535 | " Length: %u, CID: %hu\n", cmd->init_task_tag, cmd->stat_sn, | |
3536 | text_length, conn->cid); | |
3537 | return 0; | |
3538 | } | |
3539 | ||
2ec5a8c1 NB |
3540 | void |
3541 | iscsit_build_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn, | |
3542 | struct iscsi_reject *hdr) | |
3543 | { | |
3544 | hdr->opcode = ISCSI_OP_REJECT; | |
3545 | hdr->flags |= ISCSI_FLAG_CMD_FINAL; | |
3546 | hton24(hdr->dlength, ISCSI_HDR_LEN); | |
3547 | hdr->ffffffff = cpu_to_be32(0xffffffff); | |
3548 | cmd->stat_sn = conn->stat_sn++; | |
3549 | hdr->statsn = cpu_to_be32(cmd->stat_sn); | |
3550 | hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn); | |
3551 | hdr->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn); | |
3552 | ||
3553 | } | |
3554 | EXPORT_SYMBOL(iscsit_build_reject); | |
3555 | ||
e48354ce NB |
3556 | static int iscsit_send_reject( |
3557 | struct iscsi_cmd *cmd, | |
3558 | struct iscsi_conn *conn) | |
3559 | { | |
bfbdb31d | 3560 | struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0]; |
e48354ce | 3561 | struct kvec *iov; |
bfbdb31d | 3562 | u32 iov_count = 0, tx_size; |
e48354ce | 3563 | |
bfbdb31d | 3564 | iscsit_build_reject(cmd, conn, hdr); |
e48354ce NB |
3565 | |
3566 | iov = &cmd->iov_misc[0]; | |
e48354ce NB |
3567 | iov[iov_count].iov_base = cmd->pdu; |
3568 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3569 | iov[iov_count].iov_base = cmd->buf_ptr; | |
3570 | iov[iov_count++].iov_len = ISCSI_HDR_LEN; | |
3571 | ||
3572 | tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN); | |
3573 | ||
3574 | if (conn->conn_ops->HeaderDigest) { | |
3575 | u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN]; | |
3576 | ||
3577 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3578 | (unsigned char *)hdr, ISCSI_HDR_LEN, | |
3579 | 0, NULL, (u8 *)header_digest); | |
3580 | ||
3581 | iov[0].iov_len += ISCSI_CRC_LEN; | |
3582 | tx_size += ISCSI_CRC_LEN; | |
3583 | pr_debug("Attaching CRC32 HeaderDigest for" | |
3584 | " REJECT PDU 0x%08x\n", *header_digest); | |
3585 | } | |
3586 | ||
3587 | if (conn->conn_ops->DataDigest) { | |
3588 | iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, | |
3589 | (unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN, | |
3590 | 0, NULL, (u8 *)&cmd->data_crc); | |
3591 | ||
3592 | iov[iov_count].iov_base = &cmd->data_crc; | |
3593 | iov[iov_count++].iov_len = ISCSI_CRC_LEN; | |
3594 | tx_size += ISCSI_CRC_LEN; | |
3595 | pr_debug("Attaching CRC32 DataDigest for REJECT" | |
3596 | " PDU 0x%08x\n", cmd->data_crc); | |
3597 | } | |
3598 | ||
3599 | cmd->iov_misc_count = iov_count; | |
3600 | cmd->tx_size = tx_size; | |
3601 | ||
3602 | pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x," | |
3603 | " CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid); | |
3604 | ||
3605 | return 0; | |
3606 | } | |
3607 | ||
e48354ce NB |
3608 | void iscsit_thread_get_cpumask(struct iscsi_conn *conn) |
3609 | { | |
3610 | struct iscsi_thread_set *ts = conn->thread_set; | |
3611 | int ord, cpu; | |
3612 | /* | |
3613 | * thread_id is assigned from iscsit_global->ts_bitmap from | |
3614 | * within iscsi_thread_set.c:iscsi_allocate_thread_sets() | |
3615 | * | |
3616 | * Here we use thread_id to determine which CPU that this | |
3617 | * iSCSI connection's iscsi_thread_set will be scheduled to | |
3618 | * execute upon. | |
3619 | */ | |
3620 | ord = ts->thread_id % cpumask_weight(cpu_online_mask); | |
e48354ce NB |
3621 | for_each_online_cpu(cpu) { |
3622 | if (ord-- == 0) { | |
3623 | cpumask_set_cpu(cpu, conn->conn_cpumask); | |
3624 | return; | |
3625 | } | |
3626 | } | |
3627 | /* | |
3628 | * This should never be reached.. | |
3629 | */ | |
3630 | dump_stack(); | |
3631 | cpumask_setall(conn->conn_cpumask); | |
3632 | } | |
3633 | ||
3634 | static inline void iscsit_thread_check_cpumask( | |
3635 | struct iscsi_conn *conn, | |
3636 | struct task_struct *p, | |
3637 | int mode) | |
3638 | { | |
3639 | char buf[128]; | |
3640 | /* | |
3641 | * mode == 1 signals iscsi_target_tx_thread() usage. | |
3642 | * mode == 0 signals iscsi_target_rx_thread() usage. | |
3643 | */ | |
3644 | if (mode == 1) { | |
3645 | if (!conn->conn_tx_reset_cpumask) | |
3646 | return; | |
3647 | conn->conn_tx_reset_cpumask = 0; | |
3648 | } else { | |
3649 | if (!conn->conn_rx_reset_cpumask) | |
3650 | return; | |
3651 | conn->conn_rx_reset_cpumask = 0; | |
3652 | } | |
3653 | /* | |
3654 | * Update the CPU mask for this single kthread so that | |
3655 | * both TX and RX kthreads are scheduled to run on the | |
3656 | * same CPU. | |
3657 | */ | |
3658 | memset(buf, 0, 128); | |
3659 | cpumask_scnprintf(buf, 128, conn->conn_cpumask); | |
e48354ce NB |
3660 | set_cpus_allowed_ptr(p, conn->conn_cpumask); |
3661 | } | |
3662 | ||
2ec5a8c1 NB |
3663 | static int |
3664 | iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
e48354ce | 3665 | { |
6f3c0e69 AG |
3666 | int ret; |
3667 | ||
2ec5a8c1 NB |
3668 | switch (state) { |
3669 | case ISTATE_SEND_R2T: | |
3670 | ret = iscsit_send_r2t(cmd, conn); | |
3671 | if (ret < 0) | |
3672 | goto err; | |
3673 | break; | |
3674 | case ISTATE_REMOVE: | |
3675 | spin_lock_bh(&conn->cmd_lock); | |
3676 | list_del(&cmd->i_conn_node); | |
3677 | spin_unlock_bh(&conn->cmd_lock); | |
6f3c0e69 | 3678 | |
2ec5a8c1 NB |
3679 | iscsit_free_cmd(cmd); |
3680 | break; | |
3681 | case ISTATE_SEND_NOPIN_WANT_RESPONSE: | |
3682 | iscsit_mod_nopin_response_timer(conn); | |
3683 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 1); | |
3684 | if (ret < 0) | |
6f3c0e69 | 3685 | goto err; |
2ec5a8c1 NB |
3686 | break; |
3687 | case ISTATE_SEND_NOPIN_NO_RESPONSE: | |
3688 | ret = iscsit_send_unsolicited_nopin(cmd, conn, 0); | |
3689 | if (ret < 0) | |
3690 | goto err; | |
3691 | break; | |
3692 | default: | |
3693 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3694 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3695 | cmd->iscsi_opcode, cmd->init_task_tag, state, | |
3696 | conn->cid); | |
3697 | goto err; | |
6f3c0e69 AG |
3698 | } |
3699 | ||
3700 | return 0; | |
3701 | ||
3702 | err: | |
3703 | return -1; | |
3704 | } | |
3705 | ||
2ec5a8c1 NB |
3706 | static int |
3707 | iscsit_handle_immediate_queue(struct iscsi_conn *conn) | |
6f3c0e69 | 3708 | { |
2ec5a8c1 | 3709 | struct iscsit_transport *t = conn->conn_transport; |
6f3c0e69 AG |
3710 | struct iscsi_queue_req *qr; |
3711 | struct iscsi_cmd *cmd; | |
3712 | u8 state; | |
3713 | int ret; | |
3714 | ||
2ec5a8c1 NB |
3715 | while ((qr = iscsit_get_cmd_from_immediate_queue(conn))) { |
3716 | atomic_set(&conn->check_immediate_queue, 0); | |
6f3c0e69 AG |
3717 | cmd = qr->cmd; |
3718 | state = qr->state; | |
3719 | kmem_cache_free(lio_qr_cache, qr); | |
3720 | ||
2ec5a8c1 NB |
3721 | ret = t->iscsit_immediate_queue(conn, cmd, state); |
3722 | if (ret < 0) | |
3723 | return ret; | |
3724 | } | |
fd3a9025 | 3725 | |
2ec5a8c1 NB |
3726 | return 0; |
3727 | } | |
6f3c0e69 | 3728 | |
2ec5a8c1 NB |
3729 | static int |
3730 | iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) | |
3731 | { | |
3732 | int ret; | |
3733 | ||
3734 | check_rsp_state: | |
3735 | switch (state) { | |
3736 | case ISTATE_SEND_DATAIN: | |
3737 | ret = iscsit_send_datain(cmd, conn); | |
6f3c0e69 AG |
3738 | if (ret < 0) |
3739 | goto err; | |
2ec5a8c1 NB |
3740 | else if (!ret) |
3741 | /* more drs */ | |
3742 | goto check_rsp_state; | |
3743 | else if (ret == 1) { | |
3744 | /* all done */ | |
3745 | spin_lock_bh(&cmd->istate_lock); | |
3746 | cmd->i_state = ISTATE_SENT_STATUS; | |
3747 | spin_unlock_bh(&cmd->istate_lock); | |
6f3c0e69 | 3748 | |
2ec5a8c1 NB |
3749 | if (atomic_read(&conn->check_immediate_queue)) |
3750 | return 1; | |
6f3c0e69 | 3751 | |
2ec5a8c1 NB |
3752 | return 0; |
3753 | } else if (ret == 2) { | |
3754 | /* Still must send status, | |
3755 | SCF_TRANSPORT_TASK_SENSE was set */ | |
6f3c0e69 | 3756 | spin_lock_bh(&cmd->istate_lock); |
2ec5a8c1 | 3757 | cmd->i_state = ISTATE_SEND_STATUS; |
6f3c0e69 | 3758 | spin_unlock_bh(&cmd->istate_lock); |
2ec5a8c1 NB |
3759 | state = ISTATE_SEND_STATUS; |
3760 | goto check_rsp_state; | |
3761 | } | |
3762 | ||
3763 | break; | |
3764 | case ISTATE_SEND_STATUS: | |
3765 | case ISTATE_SEND_STATUS_RECOVERY: | |
3766 | ret = iscsit_send_response(cmd, conn); | |
3767 | break; | |
3768 | case ISTATE_SEND_LOGOUTRSP: | |
3769 | ret = iscsit_send_logout(cmd, conn); | |
3770 | break; | |
3771 | case ISTATE_SEND_ASYNCMSG: | |
3772 | ret = iscsit_send_conn_drop_async_message( | |
3773 | cmd, conn); | |
3774 | break; | |
3775 | case ISTATE_SEND_NOPIN: | |
3776 | ret = iscsit_send_nopin(cmd, conn); | |
3777 | break; | |
3778 | case ISTATE_SEND_REJECT: | |
3779 | ret = iscsit_send_reject(cmd, conn); | |
3780 | break; | |
3781 | case ISTATE_SEND_TASKMGTRSP: | |
3782 | ret = iscsit_send_task_mgt_rsp(cmd, conn); | |
3783 | if (ret != 0) | |
6f3c0e69 | 3784 | break; |
2ec5a8c1 NB |
3785 | ret = iscsit_tmr_post_handler(cmd, conn); |
3786 | if (ret != 0) | |
3787 | iscsit_fall_back_to_erl0(conn->sess); | |
3788 | break; | |
3789 | case ISTATE_SEND_TEXTRSP: | |
3790 | ret = iscsit_send_text_rsp(cmd, conn); | |
3791 | break; | |
3792 | default: | |
3793 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3794 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3795 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3796 | state, conn->cid); | |
3797 | goto err; | |
3798 | } | |
3799 | if (ret < 0) | |
3800 | goto err; | |
3801 | ||
3802 | if (iscsit_send_tx_data(cmd, conn, 1) < 0) { | |
3803 | iscsit_tx_thread_wait_for_tcp(conn); | |
3804 | iscsit_unmap_iovec(cmd); | |
3805 | goto err; | |
3806 | } | |
3807 | iscsit_unmap_iovec(cmd); | |
3808 | ||
3809 | switch (state) { | |
3810 | case ISTATE_SEND_LOGOUTRSP: | |
3811 | if (!iscsit_logout_post_handler(cmd, conn)) | |
3812 | goto restart; | |
3813 | /* fall through */ | |
3814 | case ISTATE_SEND_STATUS: | |
3815 | case ISTATE_SEND_ASYNCMSG: | |
3816 | case ISTATE_SEND_NOPIN: | |
3817 | case ISTATE_SEND_STATUS_RECOVERY: | |
3818 | case ISTATE_SEND_TEXTRSP: | |
3819 | case ISTATE_SEND_TASKMGTRSP: | |
3820 | spin_lock_bh(&cmd->istate_lock); | |
3821 | cmd->i_state = ISTATE_SENT_STATUS; | |
3822 | spin_unlock_bh(&cmd->istate_lock); | |
3823 | break; | |
3824 | case ISTATE_SEND_REJECT: | |
3825 | if (cmd->cmd_flags & ICF_REJECT_FAIL_CONN) { | |
3826 | cmd->cmd_flags &= ~ICF_REJECT_FAIL_CONN; | |
6f3c0e69 | 3827 | complete(&cmd->reject_comp); |
6f3c0e69 AG |
3828 | goto err; |
3829 | } | |
2ec5a8c1 NB |
3830 | complete(&cmd->reject_comp); |
3831 | break; | |
3832 | default: | |
3833 | pr_err("Unknown Opcode: 0x%02x ITT:" | |
3834 | " 0x%08x, i_state: %d on CID: %hu\n", | |
3835 | cmd->iscsi_opcode, cmd->init_task_tag, | |
3836 | cmd->i_state, conn->cid); | |
3837 | goto err; | |
6f3c0e69 AG |
3838 | } |
3839 | ||
2ec5a8c1 NB |
3840 | if (atomic_read(&conn->check_immediate_queue)) |
3841 | return 1; | |
3842 | ||
6f3c0e69 AG |
3843 | return 0; |
3844 | ||
3845 | err: | |
3846 | return -1; | |
3847 | restart: | |
3848 | return -EAGAIN; | |
3849 | } | |
3850 | ||
2ec5a8c1 NB |
3851 | static int iscsit_handle_response_queue(struct iscsi_conn *conn) |
3852 | { | |
3853 | struct iscsit_transport *t = conn->conn_transport; | |
3854 | struct iscsi_queue_req *qr; | |
3855 | struct iscsi_cmd *cmd; | |
3856 | u8 state; | |
3857 | int ret; | |
3858 | ||
3859 | while ((qr = iscsit_get_cmd_from_response_queue(conn))) { | |
3860 | cmd = qr->cmd; | |
3861 | state = qr->state; | |
3862 | kmem_cache_free(lio_qr_cache, qr); | |
3863 | ||
3864 | ret = t->iscsit_response_queue(conn, cmd, state); | |
3865 | if (ret == 1 || ret < 0) | |
3866 | return ret; | |
3867 | } | |
3868 | ||
3869 | return 0; | |
3870 | } | |
3871 | ||
6f3c0e69 AG |
3872 | int iscsi_target_tx_thread(void *arg) |
3873 | { | |
e48354ce | 3874 | int ret = 0; |
e48354ce | 3875 | struct iscsi_conn *conn; |
8359cf43 | 3876 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
3877 | /* |
3878 | * Allow ourselves to be interrupted by SIGINT so that a | |
3879 | * connection recovery / failure event can be triggered externally. | |
3880 | */ | |
3881 | allow_signal(SIGINT); | |
3882 | ||
3883 | restart: | |
3884 | conn = iscsi_tx_thread_pre_handler(ts); | |
3885 | if (!conn) | |
3886 | goto out; | |
3887 | ||
6f3c0e69 | 3888 | ret = 0; |
e48354ce NB |
3889 | |
3890 | while (!kthread_should_stop()) { | |
3891 | /* | |
3892 | * Ensure that both TX and RX per connection kthreads | |
3893 | * are scheduled to run on the same CPU. | |
3894 | */ | |
3895 | iscsit_thread_check_cpumask(conn, current, 1); | |
3896 | ||
d5627acb RD |
3897 | wait_event_interruptible(conn->queues_wq, |
3898 | !iscsit_conn_all_queues_empty(conn) || | |
3899 | ts->status == ISCSI_THREAD_SET_RESET); | |
e48354ce NB |
3900 | |
3901 | if ((ts->status == ISCSI_THREAD_SET_RESET) || | |
3902 | signal_pending(current)) | |
3903 | goto transport_err; | |
3904 | ||
fd3a9025 | 3905 | get_immediate: |
2ec5a8c1 | 3906 | ret = iscsit_handle_immediate_queue(conn); |
6f3c0e69 AG |
3907 | if (ret < 0) |
3908 | goto transport_err; | |
e48354ce | 3909 | |
2ec5a8c1 | 3910 | ret = iscsit_handle_response_queue(conn); |
fd3a9025 NB |
3911 | if (ret == 1) |
3912 | goto get_immediate; | |
3913 | else if (ret == -EAGAIN) | |
6f3c0e69 AG |
3914 | goto restart; |
3915 | else if (ret < 0) | |
3916 | goto transport_err; | |
e48354ce NB |
3917 | } |
3918 | ||
3919 | transport_err: | |
3920 | iscsit_take_action_for_connection_exit(conn); | |
3921 | goto restart; | |
3922 | out: | |
3923 | return 0; | |
3924 | } | |
3925 | ||
3e1c81a9 NB |
3926 | static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf) |
3927 | { | |
3928 | struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf; | |
3929 | struct iscsi_cmd *cmd; | |
3930 | int ret = 0; | |
3931 | ||
3932 | switch (hdr->opcode & ISCSI_OPCODE_MASK) { | |
3933 | case ISCSI_OP_SCSI_CMD: | |
3934 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3935 | if (!cmd) | |
3936 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
3937 | 1, buf, conn); | |
3938 | ||
3939 | ret = iscsit_handle_scsi_cmd(conn, cmd, buf); | |
3940 | break; | |
3941 | case ISCSI_OP_SCSI_DATA_OUT: | |
3942 | ret = iscsit_handle_data_out(conn, buf); | |
3943 | break; | |
3944 | case ISCSI_OP_NOOP_OUT: | |
3945 | cmd = NULL; | |
3946 | if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) { | |
3947 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3948 | if (!cmd) | |
3949 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
3950 | 1, buf, conn); | |
3951 | } | |
3952 | ret = iscsit_handle_nop_out(conn, cmd, buf); | |
3953 | break; | |
3954 | case ISCSI_OP_SCSI_TMFUNC: | |
3955 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3956 | if (!cmd) | |
3957 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
3958 | 1, buf, conn); | |
3959 | ||
3960 | ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf); | |
3961 | break; | |
3962 | case ISCSI_OP_TEXT: | |
3963 | ret = iscsit_handle_text_cmd(conn, buf); | |
3964 | break; | |
3965 | case ISCSI_OP_LOGOUT: | |
3966 | cmd = iscsit_allocate_cmd(conn, GFP_KERNEL); | |
3967 | if (!cmd) | |
3968 | return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, | |
3969 | 1, buf, conn); | |
3970 | ||
3971 | ret = iscsit_handle_logout_cmd(conn, cmd, buf); | |
3972 | if (ret > 0) | |
3973 | wait_for_completion_timeout(&conn->conn_logout_comp, | |
3974 | SECONDS_FOR_LOGOUT_COMP * HZ); | |
3975 | break; | |
3976 | case ISCSI_OP_SNACK: | |
3977 | ret = iscsit_handle_snack(conn, buf); | |
3978 | break; | |
3979 | default: | |
3980 | pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode); | |
3981 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
3982 | pr_err("Cannot recover from unknown" | |
3983 | " opcode while ERL=0, closing iSCSI connection.\n"); | |
3984 | return -1; | |
3985 | } | |
3986 | if (!conn->conn_ops->OFMarker) { | |
3987 | pr_err("Unable to recover from unknown" | |
3988 | " opcode while OFMarker=No, closing iSCSI" | |
3989 | " connection.\n"); | |
3990 | return -1; | |
3991 | } | |
3992 | if (iscsit_recover_from_unknown_opcode(conn) < 0) { | |
3993 | pr_err("Unable to recover from unknown" | |
3994 | " opcode, closing iSCSI connection.\n"); | |
3995 | return -1; | |
3996 | } | |
3997 | break; | |
3998 | } | |
3999 | ||
4000 | return ret; | |
4001 | } | |
4002 | ||
e48354ce NB |
4003 | int iscsi_target_rx_thread(void *arg) |
4004 | { | |
4005 | int ret; | |
4006 | u8 buffer[ISCSI_HDR_LEN], opcode; | |
4007 | u32 checksum = 0, digest = 0; | |
4008 | struct iscsi_conn *conn = NULL; | |
8359cf43 | 4009 | struct iscsi_thread_set *ts = arg; |
e48354ce NB |
4010 | struct kvec iov; |
4011 | /* | |
4012 | * Allow ourselves to be interrupted by SIGINT so that a | |
4013 | * connection recovery / failure event can be triggered externally. | |
4014 | */ | |
4015 | allow_signal(SIGINT); | |
4016 | ||
4017 | restart: | |
4018 | conn = iscsi_rx_thread_pre_handler(ts); | |
4019 | if (!conn) | |
4020 | goto out; | |
4021 | ||
3e1c81a9 NB |
4022 | if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) { |
4023 | struct completion comp; | |
4024 | int rc; | |
4025 | ||
4026 | init_completion(&comp); | |
4027 | rc = wait_for_completion_interruptible(&comp); | |
4028 | if (rc < 0) | |
4029 | goto transport_err; | |
4030 | ||
4031 | goto out; | |
4032 | } | |
4033 | ||
e48354ce NB |
4034 | while (!kthread_should_stop()) { |
4035 | /* | |
4036 | * Ensure that both TX and RX per connection kthreads | |
4037 | * are scheduled to run on the same CPU. | |
4038 | */ | |
4039 | iscsit_thread_check_cpumask(conn, current, 0); | |
4040 | ||
4041 | memset(buffer, 0, ISCSI_HDR_LEN); | |
4042 | memset(&iov, 0, sizeof(struct kvec)); | |
4043 | ||
4044 | iov.iov_base = buffer; | |
4045 | iov.iov_len = ISCSI_HDR_LEN; | |
4046 | ||
4047 | ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
4048 | if (ret != ISCSI_HDR_LEN) { | |
4049 | iscsit_rx_thread_wait_for_tcp(conn); | |
4050 | goto transport_err; | |
4051 | } | |
4052 | ||
4053 | /* | |
4054 | * Set conn->bad_hdr for use with REJECT PDUs. | |
4055 | */ | |
4056 | memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN); | |
4057 | ||
4058 | if (conn->conn_ops->HeaderDigest) { | |
4059 | iov.iov_base = &digest; | |
4060 | iov.iov_len = ISCSI_CRC_LEN; | |
4061 | ||
4062 | ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN); | |
4063 | if (ret != ISCSI_CRC_LEN) { | |
4064 | iscsit_rx_thread_wait_for_tcp(conn); | |
4065 | goto transport_err; | |
4066 | } | |
4067 | ||
4068 | iscsit_do_crypto_hash_buf(&conn->conn_rx_hash, | |
4069 | buffer, ISCSI_HDR_LEN, | |
4070 | 0, NULL, (u8 *)&checksum); | |
4071 | ||
4072 | if (digest != checksum) { | |
4073 | pr_err("HeaderDigest CRC32C failed," | |
4074 | " received 0x%08x, computed 0x%08x\n", | |
4075 | digest, checksum); | |
4076 | /* | |
4077 | * Set the PDU to 0xff so it will intentionally | |
4078 | * hit default in the switch below. | |
4079 | */ | |
4080 | memset(buffer, 0xff, ISCSI_HDR_LEN); | |
4081 | spin_lock_bh(&conn->sess->session_stats_lock); | |
4082 | conn->sess->conn_digest_errors++; | |
4083 | spin_unlock_bh(&conn->sess->session_stats_lock); | |
4084 | } else { | |
4085 | pr_debug("Got HeaderDigest CRC32C" | |
4086 | " 0x%08x\n", checksum); | |
4087 | } | |
4088 | } | |
4089 | ||
4090 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) | |
4091 | goto transport_err; | |
4092 | ||
4093 | opcode = buffer[0] & ISCSI_OPCODE_MASK; | |
4094 | ||
4095 | if (conn->sess->sess_ops->SessionType && | |
4096 | ((!(opcode & ISCSI_OP_TEXT)) || | |
4097 | (!(opcode & ISCSI_OP_LOGOUT)))) { | |
4098 | pr_err("Received illegal iSCSI Opcode: 0x%02x" | |
4099 | " while in Discovery Session, rejecting.\n", opcode); | |
4100 | iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1, | |
4101 | buffer, conn); | |
4102 | goto transport_err; | |
4103 | } | |
4104 | ||
3e1c81a9 NB |
4105 | ret = iscsi_target_rx_opcode(conn, buffer); |
4106 | if (ret < 0) | |
4107 | goto transport_err; | |
e48354ce NB |
4108 | } |
4109 | ||
4110 | transport_err: | |
4111 | if (!signal_pending(current)) | |
4112 | atomic_set(&conn->transport_failed, 1); | |
4113 | iscsit_take_action_for_connection_exit(conn); | |
4114 | goto restart; | |
4115 | out: | |
4116 | return 0; | |
4117 | } | |
4118 | ||
4119 | static void iscsit_release_commands_from_conn(struct iscsi_conn *conn) | |
4120 | { | |
4121 | struct iscsi_cmd *cmd = NULL, *cmd_tmp = NULL; | |
4122 | struct iscsi_session *sess = conn->sess; | |
e48354ce NB |
4123 | /* |
4124 | * We expect this function to only ever be called from either RX or TX | |
4125 | * thread context via iscsit_close_connection() once the other context | |
4126 | * has been reset -> returned sleeping pre-handler state. | |
4127 | */ | |
4128 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4129 | list_for_each_entry_safe(cmd, cmd_tmp, &conn->conn_cmd_list, i_conn_node) { |
e48354ce | 4130 | |
2fbb471e | 4131 | list_del(&cmd->i_conn_node); |
e48354ce NB |
4132 | spin_unlock_bh(&conn->cmd_lock); |
4133 | ||
4134 | iscsit_increment_maxcmdsn(cmd, sess); | |
e48354ce | 4135 | |
d270190a | 4136 | iscsit_free_cmd(cmd); |
e48354ce NB |
4137 | |
4138 | spin_lock_bh(&conn->cmd_lock); | |
4139 | } | |
4140 | spin_unlock_bh(&conn->cmd_lock); | |
4141 | } | |
4142 | ||
4143 | static void iscsit_stop_timers_for_cmds( | |
4144 | struct iscsi_conn *conn) | |
4145 | { | |
4146 | struct iscsi_cmd *cmd; | |
4147 | ||
4148 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 4149 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
4150 | if (cmd->data_direction == DMA_TO_DEVICE) |
4151 | iscsit_stop_dataout_timer(cmd); | |
4152 | } | |
4153 | spin_unlock_bh(&conn->cmd_lock); | |
4154 | } | |
4155 | ||
4156 | int iscsit_close_connection( | |
4157 | struct iscsi_conn *conn) | |
4158 | { | |
4159 | int conn_logout = (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT); | |
4160 | struct iscsi_session *sess = conn->sess; | |
4161 | ||
4162 | pr_debug("Closing iSCSI connection CID %hu on SID:" | |
4163 | " %u\n", conn->cid, sess->sid); | |
4164 | /* | |
4165 | * Always up conn_logout_comp just in case the RX Thread is sleeping | |
4166 | * and the logout response never got sent because the connection | |
4167 | * failed. | |
4168 | */ | |
4169 | complete(&conn->conn_logout_comp); | |
4170 | ||
4171 | iscsi_release_thread_set(conn); | |
4172 | ||
4173 | iscsit_stop_timers_for_cmds(conn); | |
4174 | iscsit_stop_nopin_response_timer(conn); | |
4175 | iscsit_stop_nopin_timer(conn); | |
4176 | iscsit_free_queue_reqs_for_conn(conn); | |
4177 | ||
4178 | /* | |
4179 | * During Connection recovery drop unacknowledged out of order | |
4180 | * commands for this connection, and prepare the other commands | |
4181 | * for realligence. | |
4182 | * | |
4183 | * During normal operation clear the out of order commands (but | |
4184 | * do not free the struct iscsi_ooo_cmdsn's) and release all | |
4185 | * struct iscsi_cmds. | |
4186 | */ | |
4187 | if (atomic_read(&conn->connection_recovery)) { | |
4188 | iscsit_discard_unacknowledged_ooo_cmdsns_for_conn(conn); | |
4189 | iscsit_prepare_cmds_for_realligance(conn); | |
4190 | } else { | |
4191 | iscsit_clear_ooo_cmdsns_for_conn(conn); | |
4192 | iscsit_release_commands_from_conn(conn); | |
4193 | } | |
4194 | ||
4195 | /* | |
4196 | * Handle decrementing session or connection usage count if | |
4197 | * a logout response was not able to be sent because the | |
4198 | * connection failed. Fall back to Session Recovery here. | |
4199 | */ | |
4200 | if (atomic_read(&conn->conn_logout_remove)) { | |
4201 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_SESSION) { | |
4202 | iscsit_dec_conn_usage_count(conn); | |
4203 | iscsit_dec_session_usage_count(sess); | |
4204 | } | |
4205 | if (conn->conn_logout_reason == ISCSI_LOGOUT_REASON_CLOSE_CONNECTION) | |
4206 | iscsit_dec_conn_usage_count(conn); | |
4207 | ||
4208 | atomic_set(&conn->conn_logout_remove, 0); | |
4209 | atomic_set(&sess->session_reinstatement, 0); | |
4210 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4211 | } | |
4212 | ||
4213 | spin_lock_bh(&sess->conn_lock); | |
4214 | list_del(&conn->conn_list); | |
4215 | ||
4216 | /* | |
4217 | * Attempt to let the Initiator know this connection failed by | |
4218 | * sending an Connection Dropped Async Message on another | |
4219 | * active connection. | |
4220 | */ | |
4221 | if (atomic_read(&conn->connection_recovery)) | |
4222 | iscsit_build_conn_drop_async_message(conn); | |
4223 | ||
4224 | spin_unlock_bh(&sess->conn_lock); | |
4225 | ||
4226 | /* | |
4227 | * If connection reinstatement is being performed on this connection, | |
4228 | * up the connection reinstatement semaphore that is being blocked on | |
4229 | * in iscsit_cause_connection_reinstatement(). | |
4230 | */ | |
4231 | spin_lock_bh(&conn->state_lock); | |
4232 | if (atomic_read(&conn->sleep_on_conn_wait_comp)) { | |
4233 | spin_unlock_bh(&conn->state_lock); | |
4234 | complete(&conn->conn_wait_comp); | |
4235 | wait_for_completion(&conn->conn_post_wait_comp); | |
4236 | spin_lock_bh(&conn->state_lock); | |
4237 | } | |
4238 | ||
4239 | /* | |
4240 | * If connection reinstatement is being performed on this connection | |
4241 | * by receiving a REMOVECONNFORRECOVERY logout request, up the | |
4242 | * connection wait rcfr semaphore that is being blocked on | |
4243 | * an iscsit_connection_reinstatement_rcfr(). | |
4244 | */ | |
4245 | if (atomic_read(&conn->connection_wait_rcfr)) { | |
4246 | spin_unlock_bh(&conn->state_lock); | |
4247 | complete(&conn->conn_wait_rcfr_comp); | |
4248 | wait_for_completion(&conn->conn_post_wait_comp); | |
4249 | spin_lock_bh(&conn->state_lock); | |
4250 | } | |
4251 | atomic_set(&conn->connection_reinstatement, 1); | |
4252 | spin_unlock_bh(&conn->state_lock); | |
4253 | ||
4254 | /* | |
4255 | * If any other processes are accessing this connection pointer we | |
4256 | * must wait until they have completed. | |
4257 | */ | |
4258 | iscsit_check_conn_usage_count(conn); | |
4259 | ||
4260 | if (conn->conn_rx_hash.tfm) | |
4261 | crypto_free_hash(conn->conn_rx_hash.tfm); | |
4262 | if (conn->conn_tx_hash.tfm) | |
4263 | crypto_free_hash(conn->conn_tx_hash.tfm); | |
4264 | ||
4265 | if (conn->conn_cpumask) | |
4266 | free_cpumask_var(conn->conn_cpumask); | |
4267 | ||
4268 | kfree(conn->conn_ops); | |
4269 | conn->conn_ops = NULL; | |
4270 | ||
bf6932f4 | 4271 | if (conn->sock) |
e48354ce | 4272 | sock_release(conn->sock); |
baa4d64b NB |
4273 | |
4274 | if (conn->conn_transport->iscsit_free_conn) | |
4275 | conn->conn_transport->iscsit_free_conn(conn); | |
4276 | ||
4277 | iscsit_put_transport(conn->conn_transport); | |
4278 | ||
e48354ce NB |
4279 | conn->thread_set = NULL; |
4280 | ||
4281 | pr_debug("Moving to TARG_CONN_STATE_FREE.\n"); | |
4282 | conn->conn_state = TARG_CONN_STATE_FREE; | |
4283 | kfree(conn); | |
4284 | ||
4285 | spin_lock_bh(&sess->conn_lock); | |
4286 | atomic_dec(&sess->nconn); | |
4287 | pr_debug("Decremented iSCSI connection count to %hu from node:" | |
4288 | " %s\n", atomic_read(&sess->nconn), | |
4289 | sess->sess_ops->InitiatorName); | |
4290 | /* | |
4291 | * Make sure that if one connection fails in an non ERL=2 iSCSI | |
4292 | * Session that they all fail. | |
4293 | */ | |
4294 | if ((sess->sess_ops->ErrorRecoveryLevel != 2) && !conn_logout && | |
4295 | !atomic_read(&sess->session_logout)) | |
4296 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
4297 | ||
4298 | /* | |
4299 | * If this was not the last connection in the session, and we are | |
4300 | * performing session reinstatement or falling back to ERL=0, call | |
4301 | * iscsit_stop_session() without sleeping to shutdown the other | |
4302 | * active connections. | |
4303 | */ | |
4304 | if (atomic_read(&sess->nconn)) { | |
4305 | if (!atomic_read(&sess->session_reinstatement) && | |
4306 | !atomic_read(&sess->session_fall_back_to_erl0)) { | |
4307 | spin_unlock_bh(&sess->conn_lock); | |
4308 | return 0; | |
4309 | } | |
4310 | if (!atomic_read(&sess->session_stop_active)) { | |
4311 | atomic_set(&sess->session_stop_active, 1); | |
4312 | spin_unlock_bh(&sess->conn_lock); | |
4313 | iscsit_stop_session(sess, 0, 0); | |
4314 | return 0; | |
4315 | } | |
4316 | spin_unlock_bh(&sess->conn_lock); | |
4317 | return 0; | |
4318 | } | |
4319 | ||
4320 | /* | |
4321 | * If this was the last connection in the session and one of the | |
4322 | * following is occurring: | |
4323 | * | |
4324 | * Session Reinstatement is not being performed, and are falling back | |
4325 | * to ERL=0 call iscsit_close_session(). | |
4326 | * | |
4327 | * Session Logout was requested. iscsit_close_session() will be called | |
4328 | * elsewhere. | |
4329 | * | |
4330 | * Session Continuation is not being performed, start the Time2Retain | |
4331 | * handler and check if sleep_on_sess_wait_sem is active. | |
4332 | */ | |
4333 | if (!atomic_read(&sess->session_reinstatement) && | |
4334 | atomic_read(&sess->session_fall_back_to_erl0)) { | |
4335 | spin_unlock_bh(&sess->conn_lock); | |
99367f01 | 4336 | target_put_session(sess->se_sess); |
e48354ce NB |
4337 | |
4338 | return 0; | |
4339 | } else if (atomic_read(&sess->session_logout)) { | |
4340 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4341 | sess->session_state = TARG_SESS_STATE_FREE; | |
4342 | spin_unlock_bh(&sess->conn_lock); | |
4343 | ||
4344 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4345 | complete(&sess->session_wait_comp); | |
4346 | ||
4347 | return 0; | |
4348 | } else { | |
4349 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4350 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4351 | ||
4352 | if (!atomic_read(&sess->session_continuation)) { | |
4353 | spin_unlock_bh(&sess->conn_lock); | |
4354 | iscsit_start_time2retain_handler(sess); | |
4355 | } else | |
4356 | spin_unlock_bh(&sess->conn_lock); | |
4357 | ||
4358 | if (atomic_read(&sess->sleep_on_sess_wait_comp)) | |
4359 | complete(&sess->session_wait_comp); | |
4360 | ||
4361 | return 0; | |
4362 | } | |
4363 | spin_unlock_bh(&sess->conn_lock); | |
4364 | ||
4365 | return 0; | |
4366 | } | |
4367 | ||
4368 | int iscsit_close_session(struct iscsi_session *sess) | |
4369 | { | |
4370 | struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess); | |
4371 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4372 | ||
4373 | if (atomic_read(&sess->nconn)) { | |
4374 | pr_err("%d connection(s) still exist for iSCSI session" | |
4375 | " to %s\n", atomic_read(&sess->nconn), | |
4376 | sess->sess_ops->InitiatorName); | |
4377 | BUG(); | |
4378 | } | |
4379 | ||
4380 | spin_lock_bh(&se_tpg->session_lock); | |
4381 | atomic_set(&sess->session_logout, 1); | |
4382 | atomic_set(&sess->session_reinstatement, 1); | |
4383 | iscsit_stop_time2retain_timer(sess); | |
4384 | spin_unlock_bh(&se_tpg->session_lock); | |
4385 | ||
4386 | /* | |
4387 | * transport_deregister_session_configfs() will clear the | |
4388 | * struct se_node_acl->nacl_sess pointer now as a iscsi_np process context | |
4389 | * can be setting it again with __transport_register_session() in | |
4390 | * iscsi_post_login_handler() again after the iscsit_stop_session() | |
4391 | * completes in iscsi_np context. | |
4392 | */ | |
4393 | transport_deregister_session_configfs(sess->se_sess); | |
4394 | ||
4395 | /* | |
4396 | * If any other processes are accessing this session pointer we must | |
4397 | * wait until they have completed. If we are in an interrupt (the | |
4398 | * time2retain handler) and contain and active session usage count we | |
4399 | * restart the timer and exit. | |
4400 | */ | |
4401 | if (!in_interrupt()) { | |
4402 | if (iscsit_check_session_usage_count(sess) == 1) | |
4403 | iscsit_stop_session(sess, 1, 1); | |
4404 | } else { | |
4405 | if (iscsit_check_session_usage_count(sess) == 2) { | |
4406 | atomic_set(&sess->session_logout, 0); | |
4407 | iscsit_start_time2retain_handler(sess); | |
4408 | return 0; | |
4409 | } | |
4410 | } | |
4411 | ||
4412 | transport_deregister_session(sess->se_sess); | |
4413 | ||
4414 | if (sess->sess_ops->ErrorRecoveryLevel == 2) | |
4415 | iscsit_free_connection_recovery_entires(sess); | |
4416 | ||
4417 | iscsit_free_all_ooo_cmdsns(sess); | |
4418 | ||
4419 | spin_lock_bh(&se_tpg->session_lock); | |
4420 | pr_debug("Moving to TARG_SESS_STATE_FREE.\n"); | |
4421 | sess->session_state = TARG_SESS_STATE_FREE; | |
4422 | pr_debug("Released iSCSI session from node: %s\n", | |
4423 | sess->sess_ops->InitiatorName); | |
4424 | tpg->nsessions--; | |
4425 | if (tpg->tpg_tiqn) | |
4426 | tpg->tpg_tiqn->tiqn_nsessions--; | |
4427 | ||
4428 | pr_debug("Decremented number of active iSCSI Sessions on" | |
4429 | " iSCSI TPG: %hu to %u\n", tpg->tpgt, tpg->nsessions); | |
4430 | ||
4431 | spin_lock(&sess_idr_lock); | |
4432 | idr_remove(&sess_idr, sess->session_index); | |
4433 | spin_unlock(&sess_idr_lock); | |
4434 | ||
4435 | kfree(sess->sess_ops); | |
4436 | sess->sess_ops = NULL; | |
4437 | spin_unlock_bh(&se_tpg->session_lock); | |
4438 | ||
4439 | kfree(sess); | |
4440 | return 0; | |
4441 | } | |
4442 | ||
4443 | static void iscsit_logout_post_handler_closesession( | |
4444 | struct iscsi_conn *conn) | |
4445 | { | |
4446 | struct iscsi_session *sess = conn->sess; | |
4447 | ||
4448 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4449 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4450 | ||
4451 | atomic_set(&conn->conn_logout_remove, 0); | |
4452 | complete(&conn->conn_logout_comp); | |
4453 | ||
4454 | iscsit_dec_conn_usage_count(conn); | |
4455 | iscsit_stop_session(sess, 1, 1); | |
4456 | iscsit_dec_session_usage_count(sess); | |
99367f01 | 4457 | target_put_session(sess->se_sess); |
e48354ce NB |
4458 | } |
4459 | ||
4460 | static void iscsit_logout_post_handler_samecid( | |
4461 | struct iscsi_conn *conn) | |
4462 | { | |
4463 | iscsi_set_thread_clear(conn, ISCSI_CLEAR_TX_THREAD); | |
4464 | iscsi_set_thread_set_signal(conn, ISCSI_SIGNAL_TX_THREAD); | |
4465 | ||
4466 | atomic_set(&conn->conn_logout_remove, 0); | |
4467 | complete(&conn->conn_logout_comp); | |
4468 | ||
4469 | iscsit_cause_connection_reinstatement(conn, 1); | |
4470 | iscsit_dec_conn_usage_count(conn); | |
4471 | } | |
4472 | ||
4473 | static void iscsit_logout_post_handler_diffcid( | |
4474 | struct iscsi_conn *conn, | |
4475 | u16 cid) | |
4476 | { | |
4477 | struct iscsi_conn *l_conn; | |
4478 | struct iscsi_session *sess = conn->sess; | |
4479 | ||
4480 | if (!sess) | |
4481 | return; | |
4482 | ||
4483 | spin_lock_bh(&sess->conn_lock); | |
4484 | list_for_each_entry(l_conn, &sess->sess_conn_list, conn_list) { | |
4485 | if (l_conn->cid == cid) { | |
4486 | iscsit_inc_conn_usage_count(l_conn); | |
4487 | break; | |
4488 | } | |
4489 | } | |
4490 | spin_unlock_bh(&sess->conn_lock); | |
4491 | ||
4492 | if (!l_conn) | |
4493 | return; | |
4494 | ||
4495 | if (l_conn->sock) | |
4496 | l_conn->sock->ops->shutdown(l_conn->sock, RCV_SHUTDOWN); | |
4497 | ||
4498 | spin_lock_bh(&l_conn->state_lock); | |
4499 | pr_debug("Moving to TARG_CONN_STATE_IN_LOGOUT.\n"); | |
4500 | l_conn->conn_state = TARG_CONN_STATE_IN_LOGOUT; | |
4501 | spin_unlock_bh(&l_conn->state_lock); | |
4502 | ||
4503 | iscsit_cause_connection_reinstatement(l_conn, 1); | |
4504 | iscsit_dec_conn_usage_count(l_conn); | |
4505 | } | |
4506 | ||
4507 | /* | |
4508 | * Return of 0 causes the TX thread to restart. | |
4509 | */ | |
2ec5a8c1 | 4510 | int iscsit_logout_post_handler( |
e48354ce NB |
4511 | struct iscsi_cmd *cmd, |
4512 | struct iscsi_conn *conn) | |
4513 | { | |
4514 | int ret = 0; | |
4515 | ||
4516 | switch (cmd->logout_reason) { | |
4517 | case ISCSI_LOGOUT_REASON_CLOSE_SESSION: | |
4518 | switch (cmd->logout_response) { | |
4519 | case ISCSI_LOGOUT_SUCCESS: | |
4520 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4521 | default: | |
4522 | iscsit_logout_post_handler_closesession(conn); | |
4523 | break; | |
4524 | } | |
4525 | ret = 0; | |
4526 | break; | |
4527 | case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION: | |
4528 | if (conn->cid == cmd->logout_cid) { | |
4529 | switch (cmd->logout_response) { | |
4530 | case ISCSI_LOGOUT_SUCCESS: | |
4531 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4532 | default: | |
4533 | iscsit_logout_post_handler_samecid(conn); | |
4534 | break; | |
4535 | } | |
4536 | ret = 0; | |
4537 | } else { | |
4538 | switch (cmd->logout_response) { | |
4539 | case ISCSI_LOGOUT_SUCCESS: | |
4540 | iscsit_logout_post_handler_diffcid(conn, | |
4541 | cmd->logout_cid); | |
4542 | break; | |
4543 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4544 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4545 | default: | |
4546 | break; | |
4547 | } | |
4548 | ret = 1; | |
4549 | } | |
4550 | break; | |
4551 | case ISCSI_LOGOUT_REASON_RECOVERY: | |
4552 | switch (cmd->logout_response) { | |
4553 | case ISCSI_LOGOUT_SUCCESS: | |
4554 | case ISCSI_LOGOUT_CID_NOT_FOUND: | |
4555 | case ISCSI_LOGOUT_RECOVERY_UNSUPPORTED: | |
4556 | case ISCSI_LOGOUT_CLEANUP_FAILED: | |
4557 | default: | |
4558 | break; | |
4559 | } | |
4560 | ret = 1; | |
4561 | break; | |
4562 | default: | |
4563 | break; | |
4564 | ||
4565 | } | |
4566 | return ret; | |
4567 | } | |
2ec5a8c1 | 4568 | EXPORT_SYMBOL(iscsit_logout_post_handler); |
e48354ce NB |
4569 | |
4570 | void iscsit_fail_session(struct iscsi_session *sess) | |
4571 | { | |
4572 | struct iscsi_conn *conn; | |
4573 | ||
4574 | spin_lock_bh(&sess->conn_lock); | |
4575 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
4576 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
4577 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
4578 | } | |
4579 | spin_unlock_bh(&sess->conn_lock); | |
4580 | ||
4581 | pr_debug("Moving to TARG_SESS_STATE_FAILED.\n"); | |
4582 | sess->session_state = TARG_SESS_STATE_FAILED; | |
4583 | } | |
4584 | ||
4585 | int iscsit_free_session(struct iscsi_session *sess) | |
4586 | { | |
4587 | u16 conn_count = atomic_read(&sess->nconn); | |
4588 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4589 | int is_last; | |
4590 | ||
4591 | spin_lock_bh(&sess->conn_lock); | |
4592 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4593 | ||
4594 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4595 | conn_list) { | |
4596 | if (conn_count == 0) | |
4597 | break; | |
4598 | ||
4599 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4600 | is_last = 1; | |
4601 | } else { | |
4602 | iscsit_inc_conn_usage_count(conn_tmp); | |
4603 | is_last = 0; | |
4604 | } | |
4605 | iscsit_inc_conn_usage_count(conn); | |
4606 | ||
4607 | spin_unlock_bh(&sess->conn_lock); | |
4608 | iscsit_cause_connection_reinstatement(conn, 1); | |
4609 | spin_lock_bh(&sess->conn_lock); | |
4610 | ||
4611 | iscsit_dec_conn_usage_count(conn); | |
4612 | if (is_last == 0) | |
4613 | iscsit_dec_conn_usage_count(conn_tmp); | |
4614 | ||
4615 | conn_count--; | |
4616 | } | |
4617 | ||
4618 | if (atomic_read(&sess->nconn)) { | |
4619 | spin_unlock_bh(&sess->conn_lock); | |
4620 | wait_for_completion(&sess->session_wait_comp); | |
4621 | } else | |
4622 | spin_unlock_bh(&sess->conn_lock); | |
4623 | ||
99367f01 | 4624 | target_put_session(sess->se_sess); |
e48354ce NB |
4625 | return 0; |
4626 | } | |
4627 | ||
4628 | void iscsit_stop_session( | |
4629 | struct iscsi_session *sess, | |
4630 | int session_sleep, | |
4631 | int connection_sleep) | |
4632 | { | |
4633 | u16 conn_count = atomic_read(&sess->nconn); | |
4634 | struct iscsi_conn *conn, *conn_tmp = NULL; | |
4635 | int is_last; | |
4636 | ||
4637 | spin_lock_bh(&sess->conn_lock); | |
4638 | if (session_sleep) | |
4639 | atomic_set(&sess->sleep_on_sess_wait_comp, 1); | |
4640 | ||
4641 | if (connection_sleep) { | |
4642 | list_for_each_entry_safe(conn, conn_tmp, &sess->sess_conn_list, | |
4643 | conn_list) { | |
4644 | if (conn_count == 0) | |
4645 | break; | |
4646 | ||
4647 | if (list_is_last(&conn->conn_list, &sess->sess_conn_list)) { | |
4648 | is_last = 1; | |
4649 | } else { | |
4650 | iscsit_inc_conn_usage_count(conn_tmp); | |
4651 | is_last = 0; | |
4652 | } | |
4653 | iscsit_inc_conn_usage_count(conn); | |
4654 | ||
4655 | spin_unlock_bh(&sess->conn_lock); | |
4656 | iscsit_cause_connection_reinstatement(conn, 1); | |
4657 | spin_lock_bh(&sess->conn_lock); | |
4658 | ||
4659 | iscsit_dec_conn_usage_count(conn); | |
4660 | if (is_last == 0) | |
4661 | iscsit_dec_conn_usage_count(conn_tmp); | |
4662 | conn_count--; | |
4663 | } | |
4664 | } else { | |
4665 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
4666 | iscsit_cause_connection_reinstatement(conn, 0); | |
4667 | } | |
4668 | ||
4669 | if (session_sleep && atomic_read(&sess->nconn)) { | |
4670 | spin_unlock_bh(&sess->conn_lock); | |
4671 | wait_for_completion(&sess->session_wait_comp); | |
4672 | } else | |
4673 | spin_unlock_bh(&sess->conn_lock); | |
4674 | } | |
4675 | ||
4676 | int iscsit_release_sessions_for_tpg(struct iscsi_portal_group *tpg, int force) | |
4677 | { | |
4678 | struct iscsi_session *sess; | |
4679 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; | |
4680 | struct se_session *se_sess, *se_sess_tmp; | |
4681 | int session_count = 0; | |
4682 | ||
4683 | spin_lock_bh(&se_tpg->session_lock); | |
4684 | if (tpg->nsessions && !force) { | |
4685 | spin_unlock_bh(&se_tpg->session_lock); | |
4686 | return -1; | |
4687 | } | |
4688 | ||
4689 | list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list, | |
4690 | sess_list) { | |
4691 | sess = (struct iscsi_session *)se_sess->fabric_sess_ptr; | |
4692 | ||
4693 | spin_lock(&sess->conn_lock); | |
4694 | if (atomic_read(&sess->session_fall_back_to_erl0) || | |
4695 | atomic_read(&sess->session_logout) || | |
4696 | (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED)) { | |
4697 | spin_unlock(&sess->conn_lock); | |
4698 | continue; | |
4699 | } | |
4700 | atomic_set(&sess->session_reinstatement, 1); | |
4701 | spin_unlock(&sess->conn_lock); | |
4702 | spin_unlock_bh(&se_tpg->session_lock); | |
4703 | ||
4704 | iscsit_free_session(sess); | |
4705 | spin_lock_bh(&se_tpg->session_lock); | |
4706 | ||
4707 | session_count++; | |
4708 | } | |
4709 | spin_unlock_bh(&se_tpg->session_lock); | |
4710 | ||
4711 | pr_debug("Released %d iSCSI Session(s) from Target Portal" | |
4712 | " Group: %hu\n", session_count, tpg->tpgt); | |
4713 | return 0; | |
4714 | } | |
4715 | ||
4716 | MODULE_DESCRIPTION("iSCSI-Target Driver for mainline target infrastructure"); | |
4717 | MODULE_VERSION("4.1.x"); | |
4718 | MODULE_AUTHOR("nab@Linux-iSCSI.org"); | |
4719 | MODULE_LICENSE("GPL"); | |
4720 | ||
4721 | module_init(iscsi_target_init_module); | |
4722 | module_exit(iscsi_target_cleanup_module); |