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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains the iSCSI Target specific utility functions. | |
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/list.h> | |
22 | #include <scsi/scsi_tcq.h> | |
23 | #include <scsi/iscsi_proto.h> | |
24 | #include <target/target_core_base.h> | |
c4795fb2 | 25 | #include <target/target_core_fabric.h> |
e48354ce NB |
26 | #include <target/target_core_configfs.h> |
27 | ||
28 | #include "iscsi_target_core.h" | |
29 | #include "iscsi_target_parameters.h" | |
30 | #include "iscsi_target_seq_pdu_list.h" | |
31 | #include "iscsi_target_datain_values.h" | |
32 | #include "iscsi_target_erl0.h" | |
33 | #include "iscsi_target_erl1.h" | |
34 | #include "iscsi_target_erl2.h" | |
35 | #include "iscsi_target_tpg.h" | |
36 | #include "iscsi_target_tq.h" | |
37 | #include "iscsi_target_util.h" | |
38 | #include "iscsi_target.h" | |
39 | ||
40 | #define PRINT_BUFF(buff, len) \ | |
41 | { \ | |
42 | int zzz; \ | |
43 | \ | |
44 | pr_debug("%d:\n", __LINE__); \ | |
45 | for (zzz = 0; zzz < len; zzz++) { \ | |
46 | if (zzz % 16 == 0) { \ | |
47 | if (zzz) \ | |
48 | pr_debug("\n"); \ | |
49 | pr_debug("%4i: ", zzz); \ | |
50 | } \ | |
51 | pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ | |
52 | } \ | |
53 | if ((len + 1) % 16) \ | |
54 | pr_debug("\n"); \ | |
55 | } | |
56 | ||
57 | extern struct list_head g_tiqn_list; | |
58 | extern spinlock_t tiqn_lock; | |
59 | ||
60 | /* | |
61 | * Called with cmd->r2t_lock held. | |
62 | */ | |
63 | int iscsit_add_r2t_to_list( | |
64 | struct iscsi_cmd *cmd, | |
65 | u32 offset, | |
66 | u32 xfer_len, | |
67 | int recovery, | |
68 | u32 r2t_sn) | |
69 | { | |
70 | struct iscsi_r2t *r2t; | |
71 | ||
72 | r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); | |
73 | if (!r2t) { | |
74 | pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); | |
75 | return -1; | |
76 | } | |
77 | INIT_LIST_HEAD(&r2t->r2t_list); | |
78 | ||
79 | r2t->recovery_r2t = recovery; | |
80 | r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; | |
81 | r2t->offset = offset; | |
82 | r2t->xfer_len = xfer_len; | |
83 | list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); | |
84 | spin_unlock_bh(&cmd->r2t_lock); | |
85 | ||
86 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); | |
87 | ||
88 | spin_lock_bh(&cmd->r2t_lock); | |
89 | return 0; | |
90 | } | |
91 | ||
92 | struct iscsi_r2t *iscsit_get_r2t_for_eos( | |
93 | struct iscsi_cmd *cmd, | |
94 | u32 offset, | |
95 | u32 length) | |
96 | { | |
97 | struct iscsi_r2t *r2t; | |
98 | ||
99 | spin_lock_bh(&cmd->r2t_lock); | |
100 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
101 | if ((r2t->offset <= offset) && | |
102 | (r2t->offset + r2t->xfer_len) >= (offset + length)) { | |
103 | spin_unlock_bh(&cmd->r2t_lock); | |
104 | return r2t; | |
105 | } | |
106 | } | |
107 | spin_unlock_bh(&cmd->r2t_lock); | |
108 | ||
109 | pr_err("Unable to locate R2T for Offset: %u, Length:" | |
110 | " %u\n", offset, length); | |
111 | return NULL; | |
112 | } | |
113 | ||
114 | struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) | |
115 | { | |
116 | struct iscsi_r2t *r2t; | |
117 | ||
118 | spin_lock_bh(&cmd->r2t_lock); | |
119 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
120 | if (!r2t->sent_r2t) { | |
121 | spin_unlock_bh(&cmd->r2t_lock); | |
122 | return r2t; | |
123 | } | |
124 | } | |
125 | spin_unlock_bh(&cmd->r2t_lock); | |
126 | ||
127 | pr_err("Unable to locate next R2T to send for ITT:" | |
128 | " 0x%08x.\n", cmd->init_task_tag); | |
129 | return NULL; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Called with cmd->r2t_lock held. | |
134 | */ | |
135 | void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) | |
136 | { | |
137 | list_del(&r2t->r2t_list); | |
138 | kmem_cache_free(lio_r2t_cache, r2t); | |
139 | } | |
140 | ||
141 | void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) | |
142 | { | |
143 | struct iscsi_r2t *r2t, *r2t_tmp; | |
144 | ||
145 | spin_lock_bh(&cmd->r2t_lock); | |
146 | list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) | |
147 | iscsit_free_r2t(r2t, cmd); | |
148 | spin_unlock_bh(&cmd->r2t_lock); | |
149 | } | |
150 | ||
151 | /* | |
152 | * May be called from software interrupt (timer) context for allocating | |
153 | * iSCSI NopINs. | |
154 | */ | |
155 | struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, gfp_t gfp_mask) | |
156 | { | |
157 | struct iscsi_cmd *cmd; | |
158 | ||
159 | cmd = kmem_cache_zalloc(lio_cmd_cache, gfp_mask); | |
160 | if (!cmd) { | |
161 | pr_err("Unable to allocate memory for struct iscsi_cmd.\n"); | |
162 | return NULL; | |
163 | } | |
164 | ||
165 | cmd->conn = conn; | |
2fbb471e | 166 | INIT_LIST_HEAD(&cmd->i_conn_node); |
e48354ce NB |
167 | INIT_LIST_HEAD(&cmd->datain_list); |
168 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); | |
169 | init_completion(&cmd->reject_comp); | |
170 | spin_lock_init(&cmd->datain_lock); | |
171 | spin_lock_init(&cmd->dataout_timeout_lock); | |
172 | spin_lock_init(&cmd->istate_lock); | |
173 | spin_lock_init(&cmd->error_lock); | |
174 | spin_lock_init(&cmd->r2t_lock); | |
175 | ||
176 | return cmd; | |
177 | } | |
178 | ||
e48354ce NB |
179 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
180 | struct iscsi_cmd *cmd, | |
181 | u32 seq_send_order) | |
182 | { | |
183 | u32 i; | |
184 | ||
185 | for (i = 0; i < cmd->seq_count; i++) | |
186 | if (cmd->seq_list[i].seq_send_order == seq_send_order) | |
187 | return &cmd->seq_list[i]; | |
188 | ||
189 | return NULL; | |
190 | } | |
191 | ||
192 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) | |
193 | { | |
194 | u32 i; | |
195 | ||
196 | if (!cmd->seq_list) { | |
197 | pr_err("struct iscsi_cmd->seq_list is NULL!\n"); | |
198 | return NULL; | |
199 | } | |
200 | ||
201 | for (i = 0; i < cmd->seq_count; i++) { | |
202 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) | |
203 | continue; | |
204 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { | |
205 | cmd->seq_send_order++; | |
206 | return &cmd->seq_list[i]; | |
207 | } | |
208 | } | |
209 | ||
210 | return NULL; | |
211 | } | |
212 | ||
213 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( | |
214 | struct iscsi_cmd *cmd, | |
215 | u32 r2t_sn) | |
216 | { | |
217 | struct iscsi_r2t *r2t; | |
218 | ||
219 | spin_lock_bh(&cmd->r2t_lock); | |
220 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
221 | if (r2t->r2t_sn == r2t_sn) { | |
222 | spin_unlock_bh(&cmd->r2t_lock); | |
223 | return r2t; | |
224 | } | |
225 | } | |
226 | spin_unlock_bh(&cmd->r2t_lock); | |
227 | ||
228 | return NULL; | |
229 | } | |
230 | ||
231 | static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) | |
232 | { | |
233 | int ret; | |
234 | ||
235 | /* | |
236 | * This is the proper method of checking received CmdSN against | |
237 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out | |
238 | * or order CmdSNs due to multiple connection sessions and/or | |
239 | * CRC failures. | |
240 | */ | |
241 | if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { | |
242 | pr_err("Received CmdSN: 0x%08x is greater than" | |
243 | " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, | |
244 | sess->max_cmd_sn); | |
245 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
246 | ||
247 | } else if (cmdsn == sess->exp_cmd_sn) { | |
248 | sess->exp_cmd_sn++; | |
249 | pr_debug("Received CmdSN matches ExpCmdSN," | |
250 | " incremented ExpCmdSN to: 0x%08x\n", | |
251 | sess->exp_cmd_sn); | |
252 | ret = CMDSN_NORMAL_OPERATION; | |
253 | ||
254 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { | |
255 | pr_debug("Received CmdSN: 0x%08x is greater" | |
256 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", | |
257 | cmdsn, sess->exp_cmd_sn); | |
258 | ret = CMDSN_HIGHER_THAN_EXP; | |
259 | ||
260 | } else { | |
261 | pr_err("Received CmdSN: 0x%08x is less than" | |
262 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, | |
263 | sess->exp_cmd_sn); | |
264 | ret = CMDSN_LOWER_THAN_EXP; | |
265 | } | |
266 | ||
267 | return ret; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Commands may be received out of order if MC/S is in use. | |
272 | * Ensure they are executed in CmdSN order. | |
273 | */ | |
274 | int iscsit_sequence_cmd( | |
275 | struct iscsi_conn *conn, | |
276 | struct iscsi_cmd *cmd, | |
277 | u32 cmdsn) | |
278 | { | |
279 | int ret; | |
280 | int cmdsn_ret; | |
281 | ||
282 | mutex_lock(&conn->sess->cmdsn_mutex); | |
283 | ||
284 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, cmdsn); | |
285 | switch (cmdsn_ret) { | |
286 | case CMDSN_NORMAL_OPERATION: | |
287 | ret = iscsit_execute_cmd(cmd, 0); | |
288 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) | |
289 | iscsit_execute_ooo_cmdsns(conn->sess); | |
290 | break; | |
291 | case CMDSN_HIGHER_THAN_EXP: | |
292 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, cmdsn); | |
293 | break; | |
294 | case CMDSN_LOWER_THAN_EXP: | |
295 | cmd->i_state = ISTATE_REMOVE; | |
296 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
297 | ret = cmdsn_ret; | |
298 | break; | |
299 | default: | |
300 | ret = cmdsn_ret; | |
301 | break; | |
302 | } | |
303 | mutex_unlock(&conn->sess->cmdsn_mutex); | |
304 | ||
305 | return ret; | |
306 | } | |
307 | ||
308 | int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) | |
309 | { | |
310 | struct iscsi_conn *conn = cmd->conn; | |
311 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
312 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
313 | u32 payload_length = ntoh24(hdr->dlength); | |
314 | ||
315 | if (conn->sess->sess_ops->InitialR2T) { | |
316 | pr_err("Received unexpected unsolicited data" | |
317 | " while InitialR2T=Yes, protocol error.\n"); | |
318 | transport_send_check_condition_and_sense(se_cmd, | |
319 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
320 | return -1; | |
321 | } | |
322 | ||
323 | if ((cmd->first_burst_len + payload_length) > | |
324 | conn->sess->sess_ops->FirstBurstLength) { | |
325 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" | |
326 | " for this Unsolicited DataOut Burst.\n", | |
327 | (cmd->first_burst_len + payload_length), | |
328 | conn->sess->sess_ops->FirstBurstLength); | |
329 | transport_send_check_condition_and_sense(se_cmd, | |
330 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
331 | return -1; | |
332 | } | |
333 | ||
334 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) | |
335 | return 0; | |
336 | ||
ebf1d95c | 337 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
e48354ce NB |
338 | ((cmd->first_burst_len + payload_length) != |
339 | conn->sess->sess_ops->FirstBurstLength)) { | |
340 | pr_err("Unsolicited non-immediate data received %u" | |
341 | " does not equal FirstBurstLength: %u, and does" | |
342 | " not equal ExpXferLen %u.\n", | |
343 | (cmd->first_burst_len + payload_length), | |
ebf1d95c | 344 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
e48354ce NB |
345 | transport_send_check_condition_and_sense(se_cmd, |
346 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
347 | return -1; | |
348 | } | |
349 | return 0; | |
350 | } | |
351 | ||
352 | struct iscsi_cmd *iscsit_find_cmd_from_itt( | |
353 | struct iscsi_conn *conn, | |
354 | u32 init_task_tag) | |
355 | { | |
356 | struct iscsi_cmd *cmd; | |
357 | ||
358 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 359 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
360 | if (cmd->init_task_tag == init_task_tag) { |
361 | spin_unlock_bh(&conn->cmd_lock); | |
362 | return cmd; | |
363 | } | |
364 | } | |
365 | spin_unlock_bh(&conn->cmd_lock); | |
366 | ||
367 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", | |
368 | init_task_tag, conn->cid); | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( | |
373 | struct iscsi_conn *conn, | |
374 | u32 init_task_tag, | |
375 | u32 length) | |
376 | { | |
377 | struct iscsi_cmd *cmd; | |
378 | ||
379 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 380 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
381 | if (cmd->init_task_tag == init_task_tag) { |
382 | spin_unlock_bh(&conn->cmd_lock); | |
383 | return cmd; | |
384 | } | |
385 | } | |
386 | spin_unlock_bh(&conn->cmd_lock); | |
387 | ||
388 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," | |
389 | " dumping payload\n", init_task_tag, conn->cid); | |
390 | if (length) | |
391 | iscsit_dump_data_payload(conn, length, 1); | |
392 | ||
393 | return NULL; | |
394 | } | |
395 | ||
396 | struct iscsi_cmd *iscsit_find_cmd_from_ttt( | |
397 | struct iscsi_conn *conn, | |
398 | u32 targ_xfer_tag) | |
399 | { | |
400 | struct iscsi_cmd *cmd = NULL; | |
401 | ||
402 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 403 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
404 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
405 | spin_unlock_bh(&conn->cmd_lock); | |
406 | return cmd; | |
407 | } | |
408 | } | |
409 | spin_unlock_bh(&conn->cmd_lock); | |
410 | ||
411 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", | |
412 | targ_xfer_tag, conn->cid); | |
413 | return NULL; | |
414 | } | |
415 | ||
416 | int iscsit_find_cmd_for_recovery( | |
417 | struct iscsi_session *sess, | |
418 | struct iscsi_cmd **cmd_ptr, | |
419 | struct iscsi_conn_recovery **cr_ptr, | |
420 | u32 init_task_tag) | |
421 | { | |
422 | struct iscsi_cmd *cmd = NULL; | |
423 | struct iscsi_conn_recovery *cr; | |
424 | /* | |
425 | * Scan through the inactive connection recovery list's command list. | |
426 | * If init_task_tag matches the command is still alligent. | |
427 | */ | |
428 | spin_lock(&sess->cr_i_lock); | |
429 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { | |
430 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 431 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
432 | if (cmd->init_task_tag == init_task_tag) { |
433 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
434 | spin_unlock(&sess->cr_i_lock); | |
435 | ||
436 | *cr_ptr = cr; | |
437 | *cmd_ptr = cmd; | |
438 | return -2; | |
439 | } | |
440 | } | |
441 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
442 | } | |
443 | spin_unlock(&sess->cr_i_lock); | |
444 | /* | |
445 | * Scan through the active connection recovery list's command list. | |
446 | * If init_task_tag matches the command is ready to be reassigned. | |
447 | */ | |
448 | spin_lock(&sess->cr_a_lock); | |
449 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { | |
450 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 451 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
452 | if (cmd->init_task_tag == init_task_tag) { |
453 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
454 | spin_unlock(&sess->cr_a_lock); | |
455 | ||
456 | *cr_ptr = cr; | |
457 | *cmd_ptr = cmd; | |
458 | return 0; | |
459 | } | |
460 | } | |
461 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
462 | } | |
463 | spin_unlock(&sess->cr_a_lock); | |
464 | ||
465 | return -1; | |
466 | } | |
467 | ||
468 | void iscsit_add_cmd_to_immediate_queue( | |
469 | struct iscsi_cmd *cmd, | |
470 | struct iscsi_conn *conn, | |
471 | u8 state) | |
472 | { | |
473 | struct iscsi_queue_req *qr; | |
474 | ||
475 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
476 | if (!qr) { | |
477 | pr_err("Unable to allocate memory for" | |
478 | " struct iscsi_queue_req\n"); | |
479 | return; | |
480 | } | |
481 | INIT_LIST_HEAD(&qr->qr_list); | |
482 | qr->cmd = cmd; | |
483 | qr->state = state; | |
484 | ||
485 | spin_lock_bh(&conn->immed_queue_lock); | |
486 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); | |
487 | atomic_inc(&cmd->immed_queue_count); | |
488 | atomic_set(&conn->check_immediate_queue, 1); | |
489 | spin_unlock_bh(&conn->immed_queue_lock); | |
490 | ||
491 | wake_up_process(conn->thread_set->tx_thread); | |
492 | } | |
493 | ||
494 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) | |
495 | { | |
496 | struct iscsi_queue_req *qr; | |
497 | ||
498 | spin_lock_bh(&conn->immed_queue_lock); | |
499 | if (list_empty(&conn->immed_queue_list)) { | |
500 | spin_unlock_bh(&conn->immed_queue_lock); | |
501 | return NULL; | |
502 | } | |
503 | list_for_each_entry(qr, &conn->immed_queue_list, qr_list) | |
504 | break; | |
505 | ||
506 | list_del(&qr->qr_list); | |
507 | if (qr->cmd) | |
508 | atomic_dec(&qr->cmd->immed_queue_count); | |
509 | spin_unlock_bh(&conn->immed_queue_lock); | |
510 | ||
511 | return qr; | |
512 | } | |
513 | ||
514 | static void iscsit_remove_cmd_from_immediate_queue( | |
515 | struct iscsi_cmd *cmd, | |
516 | struct iscsi_conn *conn) | |
517 | { | |
518 | struct iscsi_queue_req *qr, *qr_tmp; | |
519 | ||
520 | spin_lock_bh(&conn->immed_queue_lock); | |
521 | if (!atomic_read(&cmd->immed_queue_count)) { | |
522 | spin_unlock_bh(&conn->immed_queue_lock); | |
523 | return; | |
524 | } | |
525 | ||
526 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
527 | if (qr->cmd != cmd) | |
528 | continue; | |
529 | ||
530 | atomic_dec(&qr->cmd->immed_queue_count); | |
531 | list_del(&qr->qr_list); | |
532 | kmem_cache_free(lio_qr_cache, qr); | |
533 | } | |
534 | spin_unlock_bh(&conn->immed_queue_lock); | |
535 | ||
536 | if (atomic_read(&cmd->immed_queue_count)) { | |
537 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", | |
538 | cmd->init_task_tag, | |
539 | atomic_read(&cmd->immed_queue_count)); | |
540 | } | |
541 | } | |
542 | ||
543 | void iscsit_add_cmd_to_response_queue( | |
544 | struct iscsi_cmd *cmd, | |
545 | struct iscsi_conn *conn, | |
546 | u8 state) | |
547 | { | |
548 | struct iscsi_queue_req *qr; | |
549 | ||
550 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
551 | if (!qr) { | |
552 | pr_err("Unable to allocate memory for" | |
553 | " struct iscsi_queue_req\n"); | |
554 | return; | |
555 | } | |
556 | INIT_LIST_HEAD(&qr->qr_list); | |
557 | qr->cmd = cmd; | |
558 | qr->state = state; | |
559 | ||
560 | spin_lock_bh(&conn->response_queue_lock); | |
561 | list_add_tail(&qr->qr_list, &conn->response_queue_list); | |
562 | atomic_inc(&cmd->response_queue_count); | |
563 | spin_unlock_bh(&conn->response_queue_lock); | |
564 | ||
565 | wake_up_process(conn->thread_set->tx_thread); | |
566 | } | |
567 | ||
568 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) | |
569 | { | |
570 | struct iscsi_queue_req *qr; | |
571 | ||
572 | spin_lock_bh(&conn->response_queue_lock); | |
573 | if (list_empty(&conn->response_queue_list)) { | |
574 | spin_unlock_bh(&conn->response_queue_lock); | |
575 | return NULL; | |
576 | } | |
577 | ||
578 | list_for_each_entry(qr, &conn->response_queue_list, qr_list) | |
579 | break; | |
580 | ||
581 | list_del(&qr->qr_list); | |
582 | if (qr->cmd) | |
583 | atomic_dec(&qr->cmd->response_queue_count); | |
584 | spin_unlock_bh(&conn->response_queue_lock); | |
585 | ||
586 | return qr; | |
587 | } | |
588 | ||
589 | static void iscsit_remove_cmd_from_response_queue( | |
590 | struct iscsi_cmd *cmd, | |
591 | struct iscsi_conn *conn) | |
592 | { | |
593 | struct iscsi_queue_req *qr, *qr_tmp; | |
594 | ||
595 | spin_lock_bh(&conn->response_queue_lock); | |
596 | if (!atomic_read(&cmd->response_queue_count)) { | |
597 | spin_unlock_bh(&conn->response_queue_lock); | |
598 | return; | |
599 | } | |
600 | ||
601 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
602 | qr_list) { | |
603 | if (qr->cmd != cmd) | |
604 | continue; | |
605 | ||
606 | atomic_dec(&qr->cmd->response_queue_count); | |
607 | list_del(&qr->qr_list); | |
608 | kmem_cache_free(lio_qr_cache, qr); | |
609 | } | |
610 | spin_unlock_bh(&conn->response_queue_lock); | |
611 | ||
612 | if (atomic_read(&cmd->response_queue_count)) { | |
613 | pr_err("ITT: 0x%08x response_queue_count: %d\n", | |
614 | cmd->init_task_tag, | |
615 | atomic_read(&cmd->response_queue_count)); | |
616 | } | |
617 | } | |
618 | ||
619 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) | |
620 | { | |
621 | struct iscsi_queue_req *qr, *qr_tmp; | |
622 | ||
623 | spin_lock_bh(&conn->immed_queue_lock); | |
624 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
625 | list_del(&qr->qr_list); | |
626 | if (qr->cmd) | |
627 | atomic_dec(&qr->cmd->immed_queue_count); | |
628 | ||
629 | kmem_cache_free(lio_qr_cache, qr); | |
630 | } | |
631 | spin_unlock_bh(&conn->immed_queue_lock); | |
632 | ||
633 | spin_lock_bh(&conn->response_queue_lock); | |
634 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
635 | qr_list) { | |
636 | list_del(&qr->qr_list); | |
637 | if (qr->cmd) | |
638 | atomic_dec(&qr->cmd->response_queue_count); | |
639 | ||
640 | kmem_cache_free(lio_qr_cache, qr); | |
641 | } | |
642 | spin_unlock_bh(&conn->response_queue_lock); | |
643 | } | |
644 | ||
645 | void iscsit_release_cmd(struct iscsi_cmd *cmd) | |
646 | { | |
647 | struct iscsi_conn *conn = cmd->conn; | |
e48354ce NB |
648 | |
649 | iscsit_free_r2ts_from_list(cmd); | |
650 | iscsit_free_all_datain_reqs(cmd); | |
651 | ||
652 | kfree(cmd->buf_ptr); | |
653 | kfree(cmd->pdu_list); | |
654 | kfree(cmd->seq_list); | |
655 | kfree(cmd->tmr_req); | |
656 | kfree(cmd->iov_data); | |
657 | ||
e48354ce NB |
658 | if (conn) { |
659 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); | |
660 | iscsit_remove_cmd_from_response_queue(cmd, conn); | |
661 | } | |
662 | ||
663 | kmem_cache_free(lio_cmd_cache, cmd); | |
664 | } | |
665 | ||
d270190a NB |
666 | void iscsit_free_cmd(struct iscsi_cmd *cmd) |
667 | { | |
668 | /* | |
669 | * Determine if a struct se_cmd is assoicated with | |
670 | * this struct iscsi_cmd. | |
671 | */ | |
672 | switch (cmd->iscsi_opcode) { | |
673 | case ISCSI_OP_SCSI_CMD: | |
674 | case ISCSI_OP_SCSI_TMFUNC: | |
675 | transport_generic_free_cmd(&cmd->se_cmd, 1); | |
676 | break; | |
c1ce4bd5 NB |
677 | case ISCSI_OP_REJECT: |
678 | /* | |
679 | * Handle special case for REJECT when iscsi_add_reject*() has | |
680 | * overwritten the original iscsi_opcode assignment, and the | |
681 | * associated cmd->se_cmd needs to be released. | |
682 | */ | |
683 | if (cmd->se_cmd.se_tfo != NULL) { | |
684 | transport_generic_free_cmd(&cmd->se_cmd, 1); | |
685 | break; | |
686 | } | |
687 | /* Fall-through */ | |
d270190a NB |
688 | default: |
689 | iscsit_release_cmd(cmd); | |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
e48354ce NB |
694 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
695 | { | |
696 | spin_lock_bh(&sess->session_usage_lock); | |
697 | if (sess->session_usage_count != 0) { | |
698 | sess->session_waiting_on_uc = 1; | |
699 | spin_unlock_bh(&sess->session_usage_lock); | |
700 | if (in_interrupt()) | |
701 | return 2; | |
702 | ||
703 | wait_for_completion(&sess->session_waiting_on_uc_comp); | |
704 | return 1; | |
705 | } | |
706 | spin_unlock_bh(&sess->session_usage_lock); | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) | |
712 | { | |
713 | spin_lock_bh(&sess->session_usage_lock); | |
714 | sess->session_usage_count--; | |
715 | ||
716 | if (!sess->session_usage_count && sess->session_waiting_on_uc) | |
717 | complete(&sess->session_waiting_on_uc_comp); | |
718 | ||
719 | spin_unlock_bh(&sess->session_usage_lock); | |
720 | } | |
721 | ||
722 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) | |
723 | { | |
724 | spin_lock_bh(&sess->session_usage_lock); | |
725 | sess->session_usage_count++; | |
726 | spin_unlock_bh(&sess->session_usage_lock); | |
727 | } | |
728 | ||
e48354ce NB |
729 | /* |
730 | * Setup conn->if_marker and conn->of_marker values based upon | |
731 | * the initial marker-less interval. (see iSCSI v19 A.2) | |
732 | */ | |
733 | int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) | |
734 | { | |
735 | int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; | |
736 | /* | |
737 | * IFMarkInt and OFMarkInt are negotiated as 32-bit words. | |
738 | */ | |
739 | u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); | |
740 | u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); | |
741 | ||
742 | if (conn->conn_ops->OFMarker) { | |
743 | /* | |
744 | * Account for the first Login Command received not | |
745 | * via iscsi_recv_msg(). | |
746 | */ | |
747 | conn->of_marker += ISCSI_HDR_LEN; | |
748 | if (conn->of_marker <= OFMarkInt) { | |
749 | conn->of_marker = (OFMarkInt - conn->of_marker); | |
750 | } else { | |
751 | login_ofmarker_count = (conn->of_marker / OFMarkInt); | |
752 | next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + | |
753 | (login_ofmarker_count * MARKER_SIZE); | |
754 | conn->of_marker = (next_marker - conn->of_marker); | |
755 | } | |
756 | conn->of_marker_offset = 0; | |
757 | pr_debug("Setting OFMarker value to %u based on Initial" | |
758 | " Markerless Interval.\n", conn->of_marker); | |
759 | } | |
760 | ||
761 | if (conn->conn_ops->IFMarker) { | |
762 | if (conn->if_marker <= IFMarkInt) { | |
763 | conn->if_marker = (IFMarkInt - conn->if_marker); | |
764 | } else { | |
765 | login_ifmarker_count = (conn->if_marker / IFMarkInt); | |
766 | next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + | |
767 | (login_ifmarker_count * MARKER_SIZE); | |
768 | conn->if_marker = (next_marker - conn->if_marker); | |
769 | } | |
770 | pr_debug("Setting IFMarker value to %u based on Initial" | |
771 | " Markerless Interval.\n", conn->if_marker); | |
772 | } | |
773 | ||
774 | return 0; | |
775 | } | |
776 | ||
777 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) | |
778 | { | |
779 | struct iscsi_conn *conn; | |
780 | ||
781 | spin_lock_bh(&sess->conn_lock); | |
782 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
783 | if ((conn->cid == cid) && | |
784 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { | |
785 | iscsit_inc_conn_usage_count(conn); | |
786 | spin_unlock_bh(&sess->conn_lock); | |
787 | return conn; | |
788 | } | |
789 | } | |
790 | spin_unlock_bh(&sess->conn_lock); | |
791 | ||
792 | return NULL; | |
793 | } | |
794 | ||
795 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) | |
796 | { | |
797 | struct iscsi_conn *conn; | |
798 | ||
799 | spin_lock_bh(&sess->conn_lock); | |
800 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
801 | if (conn->cid == cid) { | |
802 | iscsit_inc_conn_usage_count(conn); | |
803 | spin_lock(&conn->state_lock); | |
804 | atomic_set(&conn->connection_wait_rcfr, 1); | |
805 | spin_unlock(&conn->state_lock); | |
806 | spin_unlock_bh(&sess->conn_lock); | |
807 | return conn; | |
808 | } | |
809 | } | |
810 | spin_unlock_bh(&sess->conn_lock); | |
811 | ||
812 | return NULL; | |
813 | } | |
814 | ||
815 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) | |
816 | { | |
817 | spin_lock_bh(&conn->conn_usage_lock); | |
818 | if (conn->conn_usage_count != 0) { | |
819 | conn->conn_waiting_on_uc = 1; | |
820 | spin_unlock_bh(&conn->conn_usage_lock); | |
821 | ||
822 | wait_for_completion(&conn->conn_waiting_on_uc_comp); | |
823 | return; | |
824 | } | |
825 | spin_unlock_bh(&conn->conn_usage_lock); | |
826 | } | |
827 | ||
828 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) | |
829 | { | |
830 | spin_lock_bh(&conn->conn_usage_lock); | |
831 | conn->conn_usage_count--; | |
832 | ||
833 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) | |
834 | complete(&conn->conn_waiting_on_uc_comp); | |
835 | ||
836 | spin_unlock_bh(&conn->conn_usage_lock); | |
837 | } | |
838 | ||
839 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) | |
840 | { | |
841 | spin_lock_bh(&conn->conn_usage_lock); | |
842 | conn->conn_usage_count++; | |
843 | spin_unlock_bh(&conn->conn_usage_lock); | |
844 | } | |
845 | ||
846 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) | |
847 | { | |
848 | u8 state; | |
849 | struct iscsi_cmd *cmd; | |
850 | ||
851 | cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); | |
852 | if (!cmd) | |
853 | return -1; | |
854 | ||
855 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; | |
856 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : | |
857 | ISTATE_SEND_NOPIN_NO_RESPONSE; | |
858 | cmd->init_task_tag = 0xFFFFFFFF; | |
859 | spin_lock_bh(&conn->sess->ttt_lock); | |
860 | cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : | |
861 | 0xFFFFFFFF; | |
862 | if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) | |
863 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
864 | spin_unlock_bh(&conn->sess->ttt_lock); | |
865 | ||
866 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 867 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
868 | spin_unlock_bh(&conn->cmd_lock); |
869 | ||
870 | if (want_response) | |
871 | iscsit_start_nopin_response_timer(conn); | |
872 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); | |
873 | ||
874 | return 0; | |
875 | } | |
876 | ||
877 | static void iscsit_handle_nopin_response_timeout(unsigned long data) | |
878 | { | |
879 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
880 | ||
881 | iscsit_inc_conn_usage_count(conn); | |
882 | ||
883 | spin_lock_bh(&conn->nopin_timer_lock); | |
884 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { | |
885 | spin_unlock_bh(&conn->nopin_timer_lock); | |
886 | iscsit_dec_conn_usage_count(conn); | |
887 | return; | |
888 | } | |
889 | ||
890 | pr_debug("Did not receive response to NOPIN on CID: %hu on" | |
891 | " SID: %u, failing connection.\n", conn->cid, | |
892 | conn->sess->sid); | |
893 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
894 | spin_unlock_bh(&conn->nopin_timer_lock); | |
895 | ||
896 | { | |
897 | struct iscsi_portal_group *tpg = conn->sess->tpg; | |
898 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
899 | ||
900 | if (tiqn) { | |
901 | spin_lock_bh(&tiqn->sess_err_stats.lock); | |
902 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
8359cf43 | 903 | conn->sess->sess_ops->InitiatorName); |
e48354ce NB |
904 | tiqn->sess_err_stats.last_sess_failure_type = |
905 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
906 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
907 | conn->sess->conn_timeout_errors++; | |
908 | spin_unlock_bh(&tiqn->sess_err_stats.lock); | |
909 | } | |
910 | } | |
911 | ||
912 | iscsit_cause_connection_reinstatement(conn, 0); | |
913 | iscsit_dec_conn_usage_count(conn); | |
914 | } | |
915 | ||
916 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) | |
917 | { | |
918 | struct iscsi_session *sess = conn->sess; | |
919 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
920 | ||
921 | spin_lock_bh(&conn->nopin_timer_lock); | |
922 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
923 | spin_unlock_bh(&conn->nopin_timer_lock); | |
924 | return; | |
925 | } | |
926 | ||
927 | mod_timer(&conn->nopin_response_timer, | |
928 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); | |
929 | spin_unlock_bh(&conn->nopin_timer_lock); | |
930 | } | |
931 | ||
932 | /* | |
933 | * Called with conn->nopin_timer_lock held. | |
934 | */ | |
935 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) | |
936 | { | |
937 | struct iscsi_session *sess = conn->sess; | |
938 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
939 | ||
940 | spin_lock_bh(&conn->nopin_timer_lock); | |
941 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { | |
942 | spin_unlock_bh(&conn->nopin_timer_lock); | |
943 | return; | |
944 | } | |
945 | ||
946 | init_timer(&conn->nopin_response_timer); | |
947 | conn->nopin_response_timer.expires = | |
948 | (get_jiffies_64() + na->nopin_response_timeout * HZ); | |
949 | conn->nopin_response_timer.data = (unsigned long)conn; | |
950 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; | |
951 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; | |
952 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; | |
953 | add_timer(&conn->nopin_response_timer); | |
954 | ||
955 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" | |
956 | " seconds\n", conn->cid, na->nopin_response_timeout); | |
957 | spin_unlock_bh(&conn->nopin_timer_lock); | |
958 | } | |
959 | ||
960 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) | |
961 | { | |
962 | spin_lock_bh(&conn->nopin_timer_lock); | |
963 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
964 | spin_unlock_bh(&conn->nopin_timer_lock); | |
965 | return; | |
966 | } | |
967 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; | |
968 | spin_unlock_bh(&conn->nopin_timer_lock); | |
969 | ||
970 | del_timer_sync(&conn->nopin_response_timer); | |
971 | ||
972 | spin_lock_bh(&conn->nopin_timer_lock); | |
973 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
974 | spin_unlock_bh(&conn->nopin_timer_lock); | |
975 | } | |
976 | ||
977 | static void iscsit_handle_nopin_timeout(unsigned long data) | |
978 | { | |
979 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
980 | ||
981 | iscsit_inc_conn_usage_count(conn); | |
982 | ||
983 | spin_lock_bh(&conn->nopin_timer_lock); | |
984 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { | |
985 | spin_unlock_bh(&conn->nopin_timer_lock); | |
986 | iscsit_dec_conn_usage_count(conn); | |
987 | return; | |
988 | } | |
989 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
990 | spin_unlock_bh(&conn->nopin_timer_lock); | |
991 | ||
992 | iscsit_add_nopin(conn, 1); | |
993 | iscsit_dec_conn_usage_count(conn); | |
994 | } | |
995 | ||
996 | /* | |
997 | * Called with conn->nopin_timer_lock held. | |
998 | */ | |
999 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1000 | { | |
1001 | struct iscsi_session *sess = conn->sess; | |
1002 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1003 | /* | |
1004 | * NOPIN timeout is disabled. | |
1005 | */ | |
1006 | if (!na->nopin_timeout) | |
1007 | return; | |
1008 | ||
1009 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) | |
1010 | return; | |
1011 | ||
1012 | init_timer(&conn->nopin_timer); | |
1013 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1014 | conn->nopin_timer.data = (unsigned long)conn; | |
1015 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1016 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1017 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1018 | add_timer(&conn->nopin_timer); | |
1019 | ||
1020 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1021 | " interval\n", conn->cid, na->nopin_timeout); | |
1022 | } | |
1023 | ||
1024 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1025 | { | |
1026 | struct iscsi_session *sess = conn->sess; | |
1027 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1028 | /* | |
1029 | * NOPIN timeout is disabled.. | |
1030 | */ | |
1031 | if (!na->nopin_timeout) | |
1032 | return; | |
1033 | ||
1034 | spin_lock_bh(&conn->nopin_timer_lock); | |
1035 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { | |
1036 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1037 | return; | |
1038 | } | |
1039 | ||
1040 | init_timer(&conn->nopin_timer); | |
1041 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1042 | conn->nopin_timer.data = (unsigned long)conn; | |
1043 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1044 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1045 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1046 | add_timer(&conn->nopin_timer); | |
1047 | ||
1048 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1049 | " interval\n", conn->cid, na->nopin_timeout); | |
1050 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1051 | } | |
1052 | ||
1053 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) | |
1054 | { | |
1055 | spin_lock_bh(&conn->nopin_timer_lock); | |
1056 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { | |
1057 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1058 | return; | |
1059 | } | |
1060 | conn->nopin_timer_flags |= ISCSI_TF_STOP; | |
1061 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1062 | ||
1063 | del_timer_sync(&conn->nopin_timer); | |
1064 | ||
1065 | spin_lock_bh(&conn->nopin_timer_lock); | |
1066 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1067 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1068 | } | |
1069 | ||
1070 | int iscsit_send_tx_data( | |
1071 | struct iscsi_cmd *cmd, | |
1072 | struct iscsi_conn *conn, | |
1073 | int use_misc) | |
1074 | { | |
1075 | int tx_sent, tx_size; | |
1076 | u32 iov_count; | |
1077 | struct kvec *iov; | |
1078 | ||
1079 | send_data: | |
1080 | tx_size = cmd->tx_size; | |
1081 | ||
1082 | if (!use_misc) { | |
1083 | iov = &cmd->iov_data[0]; | |
1084 | iov_count = cmd->iov_data_count; | |
1085 | } else { | |
1086 | iov = &cmd->iov_misc[0]; | |
1087 | iov_count = cmd->iov_misc_count; | |
1088 | } | |
1089 | ||
1090 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); | |
1091 | if (tx_size != tx_sent) { | |
1092 | if (tx_sent == -EAGAIN) { | |
1093 | pr_err("tx_data() returned -EAGAIN\n"); | |
1094 | goto send_data; | |
1095 | } else | |
1096 | return -1; | |
1097 | } | |
1098 | cmd->tx_size = 0; | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | int iscsit_fe_sendpage_sg( | |
1104 | struct iscsi_cmd *cmd, | |
1105 | struct iscsi_conn *conn) | |
1106 | { | |
1107 | struct scatterlist *sg = cmd->first_data_sg; | |
1108 | struct kvec iov; | |
1109 | u32 tx_hdr_size, data_len; | |
1110 | u32 offset = cmd->first_data_sg_off; | |
40b05497 | 1111 | int tx_sent, iov_off; |
e48354ce NB |
1112 | |
1113 | send_hdr: | |
1114 | tx_hdr_size = ISCSI_HDR_LEN; | |
1115 | if (conn->conn_ops->HeaderDigest) | |
1116 | tx_hdr_size += ISCSI_CRC_LEN; | |
1117 | ||
1118 | iov.iov_base = cmd->pdu; | |
1119 | iov.iov_len = tx_hdr_size; | |
1120 | ||
1121 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); | |
1122 | if (tx_hdr_size != tx_sent) { | |
1123 | if (tx_sent == -EAGAIN) { | |
1124 | pr_err("tx_data() returned -EAGAIN\n"); | |
1125 | goto send_hdr; | |
1126 | } | |
1127 | return -1; | |
1128 | } | |
1129 | ||
1130 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; | |
40b05497 NB |
1131 | /* |
1132 | * Set iov_off used by padding and data digest tx_data() calls below | |
1133 | * in order to determine proper offset into cmd->iov_data[] | |
1134 | */ | |
1135 | if (conn->conn_ops->DataDigest) { | |
e48354ce | 1136 | data_len -= ISCSI_CRC_LEN; |
40b05497 NB |
1137 | if (cmd->padding) |
1138 | iov_off = (cmd->iov_data_count - 2); | |
1139 | else | |
1140 | iov_off = (cmd->iov_data_count - 1); | |
1141 | } else { | |
1142 | iov_off = (cmd->iov_data_count - 1); | |
1143 | } | |
e48354ce NB |
1144 | /* |
1145 | * Perform sendpage() for each page in the scatterlist | |
1146 | */ | |
1147 | while (data_len) { | |
1148 | u32 space = (sg->length - offset); | |
1149 | u32 sub_len = min_t(u32, data_len, space); | |
1150 | send_pg: | |
1151 | tx_sent = conn->sock->ops->sendpage(conn->sock, | |
1152 | sg_page(sg), sg->offset + offset, sub_len, 0); | |
1153 | if (tx_sent != sub_len) { | |
1154 | if (tx_sent == -EAGAIN) { | |
1155 | pr_err("tcp_sendpage() returned" | |
1156 | " -EAGAIN\n"); | |
1157 | goto send_pg; | |
1158 | } | |
1159 | ||
1160 | pr_err("tcp_sendpage() failure: %d\n", | |
1161 | tx_sent); | |
1162 | return -1; | |
1163 | } | |
1164 | ||
1165 | data_len -= sub_len; | |
1166 | offset = 0; | |
1167 | sg = sg_next(sg); | |
1168 | } | |
1169 | ||
1170 | send_padding: | |
1171 | if (cmd->padding) { | |
40b05497 | 1172 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
e48354ce NB |
1173 | |
1174 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); | |
1175 | if (cmd->padding != tx_sent) { | |
1176 | if (tx_sent == -EAGAIN) { | |
1177 | pr_err("tx_data() returned -EAGAIN\n"); | |
1178 | goto send_padding; | |
1179 | } | |
1180 | return -1; | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | send_datacrc: | |
1185 | if (conn->conn_ops->DataDigest) { | |
40b05497 | 1186 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
e48354ce NB |
1187 | |
1188 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); | |
1189 | if (ISCSI_CRC_LEN != tx_sent) { | |
1190 | if (tx_sent == -EAGAIN) { | |
1191 | pr_err("tx_data() returned -EAGAIN\n"); | |
1192 | goto send_datacrc; | |
1193 | } | |
1194 | return -1; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU | |
1203 | * back to the Initiator when an expection condition occurs with the | |
1204 | * errors set in status_class and status_detail. | |
1205 | * | |
1206 | * Parameters: iSCSI Connection, Status Class, Status Detail. | |
1207 | * Returns: 0 on success, -1 on error. | |
1208 | */ | |
1209 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) | |
1210 | { | |
1211 | u8 iscsi_hdr[ISCSI_HDR_LEN]; | |
1212 | int err; | |
1213 | struct kvec iov; | |
1214 | struct iscsi_login_rsp *hdr; | |
1215 | ||
1216 | iscsit_collect_login_stats(conn, status_class, status_detail); | |
1217 | ||
1218 | memset(&iov, 0, sizeof(struct kvec)); | |
1219 | memset(&iscsi_hdr, 0x0, ISCSI_HDR_LEN); | |
1220 | ||
1221 | hdr = (struct iscsi_login_rsp *)&iscsi_hdr; | |
1222 | hdr->opcode = ISCSI_OP_LOGIN_RSP; | |
1223 | hdr->status_class = status_class; | |
1224 | hdr->status_detail = status_detail; | |
1225 | hdr->itt = cpu_to_be32(conn->login_itt); | |
1226 | ||
1227 | iov.iov_base = &iscsi_hdr; | |
1228 | iov.iov_len = ISCSI_HDR_LEN; | |
1229 | ||
1230 | PRINT_BUFF(iscsi_hdr, ISCSI_HDR_LEN); | |
1231 | ||
1232 | err = tx_data(conn, &iov, 1, ISCSI_HDR_LEN); | |
1233 | if (err != ISCSI_HDR_LEN) { | |
1234 | pr_err("tx_data returned less than expected\n"); | |
1235 | return -1; | |
1236 | } | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | void iscsit_print_session_params(struct iscsi_session *sess) | |
1242 | { | |
1243 | struct iscsi_conn *conn; | |
1244 | ||
1245 | pr_debug("-----------------------------[Session Params for" | |
1246 | " SID: %u]-----------------------------\n", sess->sid); | |
1247 | spin_lock_bh(&sess->conn_lock); | |
1248 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
1249 | iscsi_dump_conn_ops(conn->conn_ops); | |
1250 | spin_unlock_bh(&sess->conn_lock); | |
1251 | ||
1252 | iscsi_dump_sess_ops(sess->sess_ops); | |
1253 | } | |
1254 | ||
1255 | static int iscsit_do_rx_data( | |
1256 | struct iscsi_conn *conn, | |
1257 | struct iscsi_data_count *count) | |
1258 | { | |
1259 | int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; | |
2ff017f5 | 1260 | struct kvec *iov_p; |
e48354ce NB |
1261 | struct msghdr msg; |
1262 | ||
1263 | if (!conn || !conn->sock || !conn->conn_ops) | |
1264 | return -1; | |
1265 | ||
1266 | memset(&msg, 0, sizeof(struct msghdr)); | |
1267 | ||
2ff017f5 NB |
1268 | iov_p = count->iov; |
1269 | iov_len = count->iov_count; | |
e48354ce NB |
1270 | |
1271 | while (total_rx < data) { | |
1272 | rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, | |
1273 | (data - total_rx), MSG_WAITALL); | |
1274 | if (rx_loop <= 0) { | |
1275 | pr_debug("rx_loop: %d total_rx: %d\n", | |
1276 | rx_loop, total_rx); | |
1277 | return rx_loop; | |
1278 | } | |
1279 | total_rx += rx_loop; | |
1280 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", | |
1281 | rx_loop, total_rx, data); | |
1282 | } | |
1283 | ||
e48354ce NB |
1284 | return total_rx; |
1285 | } | |
1286 | ||
1287 | static int iscsit_do_tx_data( | |
1288 | struct iscsi_conn *conn, | |
1289 | struct iscsi_data_count *count) | |
1290 | { | |
1291 | int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; | |
2ff017f5 | 1292 | struct kvec *iov_p; |
e48354ce NB |
1293 | struct msghdr msg; |
1294 | ||
1295 | if (!conn || !conn->sock || !conn->conn_ops) | |
1296 | return -1; | |
1297 | ||
1298 | if (data <= 0) { | |
1299 | pr_err("Data length is: %d\n", data); | |
1300 | return -1; | |
1301 | } | |
1302 | ||
1303 | memset(&msg, 0, sizeof(struct msghdr)); | |
1304 | ||
2ff017f5 NB |
1305 | iov_p = count->iov; |
1306 | iov_len = count->iov_count; | |
e48354ce NB |
1307 | |
1308 | while (total_tx < data) { | |
1309 | tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, | |
1310 | (data - total_tx)); | |
1311 | if (tx_loop <= 0) { | |
1312 | pr_debug("tx_loop: %d total_tx %d\n", | |
1313 | tx_loop, total_tx); | |
1314 | return tx_loop; | |
1315 | } | |
1316 | total_tx += tx_loop; | |
1317 | pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", | |
1318 | tx_loop, total_tx, data); | |
1319 | } | |
1320 | ||
e48354ce NB |
1321 | return total_tx; |
1322 | } | |
1323 | ||
1324 | int rx_data( | |
1325 | struct iscsi_conn *conn, | |
1326 | struct kvec *iov, | |
1327 | int iov_count, | |
1328 | int data) | |
1329 | { | |
1330 | struct iscsi_data_count c; | |
1331 | ||
1332 | if (!conn || !conn->sock || !conn->conn_ops) | |
1333 | return -1; | |
1334 | ||
1335 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1336 | c.iov = iov; | |
1337 | c.iov_count = iov_count; | |
1338 | c.data_length = data; | |
1339 | c.type = ISCSI_RX_DATA; | |
1340 | ||
e48354ce NB |
1341 | return iscsit_do_rx_data(conn, &c); |
1342 | } | |
1343 | ||
1344 | int tx_data( | |
1345 | struct iscsi_conn *conn, | |
1346 | struct kvec *iov, | |
1347 | int iov_count, | |
1348 | int data) | |
1349 | { | |
1350 | struct iscsi_data_count c; | |
1351 | ||
1352 | if (!conn || !conn->sock || !conn->conn_ops) | |
1353 | return -1; | |
1354 | ||
1355 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1356 | c.iov = iov; | |
1357 | c.iov_count = iov_count; | |
1358 | c.data_length = data; | |
1359 | c.type = ISCSI_TX_DATA; | |
1360 | ||
e48354ce NB |
1361 | return iscsit_do_tx_data(conn, &c); |
1362 | } | |
1363 | ||
1364 | void iscsit_collect_login_stats( | |
1365 | struct iscsi_conn *conn, | |
1366 | u8 status_class, | |
1367 | u8 status_detail) | |
1368 | { | |
1369 | struct iscsi_param *intrname = NULL; | |
1370 | struct iscsi_tiqn *tiqn; | |
1371 | struct iscsi_login_stats *ls; | |
1372 | ||
1373 | tiqn = iscsit_snmp_get_tiqn(conn); | |
1374 | if (!tiqn) | |
1375 | return; | |
1376 | ||
1377 | ls = &tiqn->login_stats; | |
1378 | ||
1379 | spin_lock(&ls->lock); | |
1380 | if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && | |
1381 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { | |
1382 | /* We already have the failure info for this login */ | |
1383 | spin_unlock(&ls->lock); | |
1384 | return; | |
1385 | } | |
1386 | ||
1387 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) | |
1388 | ls->accepts++; | |
1389 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { | |
1390 | ls->redirects++; | |
1391 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; | |
1392 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1393 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { | |
1394 | ls->authenticate_fails++; | |
1395 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; | |
1396 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1397 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { | |
1398 | ls->authorize_fails++; | |
1399 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; | |
1400 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1401 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { | |
1402 | ls->negotiate_fails++; | |
1403 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; | |
1404 | } else { | |
1405 | ls->other_fails++; | |
1406 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; | |
1407 | } | |
1408 | ||
1409 | /* Save initiator name, ip address and time, if it is a failed login */ | |
1410 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { | |
1411 | if (conn->param_list) | |
1412 | intrname = iscsi_find_param_from_key(INITIATORNAME, | |
1413 | conn->param_list); | |
1414 | strcpy(ls->last_intr_fail_name, | |
1415 | (intrname ? intrname->value : "Unknown")); | |
1416 | ||
1417 | ls->last_intr_fail_ip_family = conn->sock->sk->sk_family; | |
1418 | snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, | |
1419 | "%s", conn->login_ip); | |
1420 | ls->last_fail_time = get_jiffies_64(); | |
1421 | } | |
1422 | ||
1423 | spin_unlock(&ls->lock); | |
1424 | } | |
1425 | ||
1426 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) | |
1427 | { | |
1428 | struct iscsi_portal_group *tpg; | |
1429 | ||
1430 | if (!conn || !conn->sess) | |
1431 | return NULL; | |
1432 | ||
1433 | tpg = conn->sess->tpg; | |
1434 | if (!tpg) | |
1435 | return NULL; | |
1436 | ||
1437 | if (!tpg->tpg_tiqn) | |
1438 | return NULL; | |
1439 | ||
1440 | return tpg->tpg_tiqn; | |
1441 | } |