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e48354ce NB |
1 | /******************************************************************************* |
2 | * This file contains the iSCSI Target specific utility functions. | |
3 | * | |
4c76251e | 4 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
5 | * |
6 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | ******************************************************************************/ | |
18 | ||
19 | #include <linux/list.h> | |
988e3a85 | 20 | #include <linux/percpu_ida.h> |
e48354ce NB |
21 | #include <scsi/scsi_tcq.h> |
22 | #include <scsi/iscsi_proto.h> | |
23 | #include <target/target_core_base.h> | |
c4795fb2 | 24 | #include <target/target_core_fabric.h> |
e48354ce | 25 | #include <target/target_core_configfs.h> |
baa4d64b | 26 | #include <target/iscsi/iscsi_transport.h> |
e48354ce NB |
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; | |
988e3a85 NB |
158 | struct se_session *se_sess = conn->sess->se_sess; |
159 | int size, tag; | |
e48354ce | 160 | |
988e3a85 NB |
161 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, gfp_mask); |
162 | size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; | |
163 | cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); | |
164 | memset(cmd, 0, size); | |
165 | ||
166 | cmd->se_cmd.map_tag = tag; | |
cdb72665 | 167 | cmd->conn = conn; |
2fbb471e | 168 | INIT_LIST_HEAD(&cmd->i_conn_node); |
e48354ce NB |
169 | INIT_LIST_HEAD(&cmd->datain_list); |
170 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); | |
e48354ce NB |
171 | spin_lock_init(&cmd->datain_lock); |
172 | spin_lock_init(&cmd->dataout_timeout_lock); | |
173 | spin_lock_init(&cmd->istate_lock); | |
174 | spin_lock_init(&cmd->error_lock); | |
175 | spin_lock_init(&cmd->r2t_lock); | |
176 | ||
177 | return cmd; | |
178 | } | |
cdb72665 | 179 | EXPORT_SYMBOL(iscsit_allocate_cmd); |
e48354ce | 180 | |
e48354ce NB |
181 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
182 | struct iscsi_cmd *cmd, | |
183 | u32 seq_send_order) | |
184 | { | |
185 | u32 i; | |
186 | ||
187 | for (i = 0; i < cmd->seq_count; i++) | |
188 | if (cmd->seq_list[i].seq_send_order == seq_send_order) | |
189 | return &cmd->seq_list[i]; | |
190 | ||
191 | return NULL; | |
192 | } | |
193 | ||
194 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) | |
195 | { | |
196 | u32 i; | |
197 | ||
198 | if (!cmd->seq_list) { | |
199 | pr_err("struct iscsi_cmd->seq_list is NULL!\n"); | |
200 | return NULL; | |
201 | } | |
202 | ||
203 | for (i = 0; i < cmd->seq_count; i++) { | |
204 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) | |
205 | continue; | |
206 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { | |
207 | cmd->seq_send_order++; | |
208 | return &cmd->seq_list[i]; | |
209 | } | |
210 | } | |
211 | ||
212 | return NULL; | |
213 | } | |
214 | ||
215 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( | |
216 | struct iscsi_cmd *cmd, | |
217 | u32 r2t_sn) | |
218 | { | |
219 | struct iscsi_r2t *r2t; | |
220 | ||
221 | spin_lock_bh(&cmd->r2t_lock); | |
222 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
223 | if (r2t->r2t_sn == r2t_sn) { | |
224 | spin_unlock_bh(&cmd->r2t_lock); | |
225 | return r2t; | |
226 | } | |
227 | } | |
228 | spin_unlock_bh(&cmd->r2t_lock); | |
229 | ||
230 | return NULL; | |
231 | } | |
232 | ||
233 | static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) | |
234 | { | |
235 | int ret; | |
236 | ||
237 | /* | |
238 | * This is the proper method of checking received CmdSN against | |
239 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out | |
240 | * or order CmdSNs due to multiple connection sessions and/or | |
241 | * CRC failures. | |
242 | */ | |
243 | if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { | |
244 | pr_err("Received CmdSN: 0x%08x is greater than" | |
245 | " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn, | |
246 | sess->max_cmd_sn); | |
247 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
248 | ||
249 | } else if (cmdsn == sess->exp_cmd_sn) { | |
250 | sess->exp_cmd_sn++; | |
251 | pr_debug("Received CmdSN matches ExpCmdSN," | |
252 | " incremented ExpCmdSN to: 0x%08x\n", | |
253 | sess->exp_cmd_sn); | |
254 | ret = CMDSN_NORMAL_OPERATION; | |
255 | ||
256 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { | |
257 | pr_debug("Received CmdSN: 0x%08x is greater" | |
258 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", | |
259 | cmdsn, sess->exp_cmd_sn); | |
260 | ret = CMDSN_HIGHER_THAN_EXP; | |
261 | ||
262 | } else { | |
263 | pr_err("Received CmdSN: 0x%08x is less than" | |
264 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, | |
265 | sess->exp_cmd_sn); | |
266 | ret = CMDSN_LOWER_THAN_EXP; | |
267 | } | |
268 | ||
269 | return ret; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Commands may be received out of order if MC/S is in use. | |
274 | * Ensure they are executed in CmdSN order. | |
275 | */ | |
561bf158 NB |
276 | int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
277 | unsigned char *buf, __be32 cmdsn) | |
e48354ce | 278 | { |
561bf158 NB |
279 | int ret, cmdsn_ret; |
280 | bool reject = false; | |
281 | u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; | |
e48354ce NB |
282 | |
283 | mutex_lock(&conn->sess->cmdsn_mutex); | |
284 | ||
50e5c87d | 285 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); |
e48354ce NB |
286 | switch (cmdsn_ret) { |
287 | case CMDSN_NORMAL_OPERATION: | |
288 | ret = iscsit_execute_cmd(cmd, 0); | |
289 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) | |
290 | iscsit_execute_ooo_cmdsns(conn->sess); | |
561bf158 NB |
291 | else if (ret < 0) { |
292 | reject = true; | |
293 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
294 | } | |
e48354ce NB |
295 | break; |
296 | case CMDSN_HIGHER_THAN_EXP: | |
50e5c87d | 297 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); |
561bf158 NB |
298 | if (ret < 0) { |
299 | reject = true; | |
300 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
301 | break; | |
302 | } | |
303 | ret = CMDSN_HIGHER_THAN_EXP; | |
e48354ce NB |
304 | break; |
305 | case CMDSN_LOWER_THAN_EXP: | |
306 | cmd->i_state = ISTATE_REMOVE; | |
307 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
308 | ret = cmdsn_ret; | |
309 | break; | |
310 | default: | |
561bf158 NB |
311 | reason = ISCSI_REASON_PROTOCOL_ERROR; |
312 | reject = true; | |
e48354ce NB |
313 | ret = cmdsn_ret; |
314 | break; | |
315 | } | |
316 | mutex_unlock(&conn->sess->cmdsn_mutex); | |
317 | ||
561bf158 NB |
318 | if (reject) |
319 | iscsit_reject_cmd(cmd, reason, buf); | |
320 | ||
e48354ce NB |
321 | return ret; |
322 | } | |
3e1c81a9 | 323 | EXPORT_SYMBOL(iscsit_sequence_cmd); |
e48354ce NB |
324 | |
325 | int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) | |
326 | { | |
327 | struct iscsi_conn *conn = cmd->conn; | |
328 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
329 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
330 | u32 payload_length = ntoh24(hdr->dlength); | |
331 | ||
332 | if (conn->sess->sess_ops->InitialR2T) { | |
333 | pr_err("Received unexpected unsolicited data" | |
334 | " while InitialR2T=Yes, protocol error.\n"); | |
335 | transport_send_check_condition_and_sense(se_cmd, | |
336 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
337 | return -1; | |
338 | } | |
339 | ||
340 | if ((cmd->first_burst_len + payload_length) > | |
341 | conn->sess->sess_ops->FirstBurstLength) { | |
342 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" | |
343 | " for this Unsolicited DataOut Burst.\n", | |
344 | (cmd->first_burst_len + payload_length), | |
345 | conn->sess->sess_ops->FirstBurstLength); | |
346 | transport_send_check_condition_and_sense(se_cmd, | |
347 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
348 | return -1; | |
349 | } | |
350 | ||
351 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) | |
352 | return 0; | |
353 | ||
ebf1d95c | 354 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
e48354ce NB |
355 | ((cmd->first_burst_len + payload_length) != |
356 | conn->sess->sess_ops->FirstBurstLength)) { | |
357 | pr_err("Unsolicited non-immediate data received %u" | |
358 | " does not equal FirstBurstLength: %u, and does" | |
359 | " not equal ExpXferLen %u.\n", | |
360 | (cmd->first_burst_len + payload_length), | |
ebf1d95c | 361 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
e48354ce NB |
362 | transport_send_check_condition_and_sense(se_cmd, |
363 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
364 | return -1; | |
365 | } | |
366 | return 0; | |
367 | } | |
368 | ||
369 | struct iscsi_cmd *iscsit_find_cmd_from_itt( | |
370 | struct iscsi_conn *conn, | |
66c7db68 | 371 | itt_t init_task_tag) |
e48354ce NB |
372 | { |
373 | struct iscsi_cmd *cmd; | |
374 | ||
375 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 376 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
377 | if (cmd->init_task_tag == init_task_tag) { |
378 | spin_unlock_bh(&conn->cmd_lock); | |
379 | return cmd; | |
380 | } | |
381 | } | |
382 | spin_unlock_bh(&conn->cmd_lock); | |
383 | ||
384 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", | |
385 | init_task_tag, conn->cid); | |
386 | return NULL; | |
387 | } | |
388 | ||
389 | struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( | |
390 | struct iscsi_conn *conn, | |
66c7db68 | 391 | itt_t init_task_tag, |
e48354ce NB |
392 | u32 length) |
393 | { | |
394 | struct iscsi_cmd *cmd; | |
395 | ||
396 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 397 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
398 | if (cmd->init_task_tag == init_task_tag) { |
399 | spin_unlock_bh(&conn->cmd_lock); | |
400 | return cmd; | |
401 | } | |
402 | } | |
403 | spin_unlock_bh(&conn->cmd_lock); | |
404 | ||
405 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," | |
406 | " dumping payload\n", init_task_tag, conn->cid); | |
407 | if (length) | |
408 | iscsit_dump_data_payload(conn, length, 1); | |
409 | ||
410 | return NULL; | |
411 | } | |
412 | ||
413 | struct iscsi_cmd *iscsit_find_cmd_from_ttt( | |
414 | struct iscsi_conn *conn, | |
415 | u32 targ_xfer_tag) | |
416 | { | |
417 | struct iscsi_cmd *cmd = NULL; | |
418 | ||
419 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 420 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
421 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
422 | spin_unlock_bh(&conn->cmd_lock); | |
423 | return cmd; | |
424 | } | |
425 | } | |
426 | spin_unlock_bh(&conn->cmd_lock); | |
427 | ||
428 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", | |
429 | targ_xfer_tag, conn->cid); | |
430 | return NULL; | |
431 | } | |
432 | ||
433 | int iscsit_find_cmd_for_recovery( | |
434 | struct iscsi_session *sess, | |
435 | struct iscsi_cmd **cmd_ptr, | |
436 | struct iscsi_conn_recovery **cr_ptr, | |
66c7db68 | 437 | itt_t init_task_tag) |
e48354ce NB |
438 | { |
439 | struct iscsi_cmd *cmd = NULL; | |
440 | struct iscsi_conn_recovery *cr; | |
441 | /* | |
442 | * Scan through the inactive connection recovery list's command list. | |
443 | * If init_task_tag matches the command is still alligent. | |
444 | */ | |
445 | spin_lock(&sess->cr_i_lock); | |
446 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { | |
447 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 448 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
449 | if (cmd->init_task_tag == init_task_tag) { |
450 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
451 | spin_unlock(&sess->cr_i_lock); | |
452 | ||
453 | *cr_ptr = cr; | |
454 | *cmd_ptr = cmd; | |
455 | return -2; | |
456 | } | |
457 | } | |
458 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
459 | } | |
460 | spin_unlock(&sess->cr_i_lock); | |
461 | /* | |
462 | * Scan through the active connection recovery list's command list. | |
463 | * If init_task_tag matches the command is ready to be reassigned. | |
464 | */ | |
465 | spin_lock(&sess->cr_a_lock); | |
466 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { | |
467 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 468 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
469 | if (cmd->init_task_tag == init_task_tag) { |
470 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
471 | spin_unlock(&sess->cr_a_lock); | |
472 | ||
473 | *cr_ptr = cr; | |
474 | *cmd_ptr = cmd; | |
475 | return 0; | |
476 | } | |
477 | } | |
478 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
479 | } | |
480 | spin_unlock(&sess->cr_a_lock); | |
481 | ||
482 | return -1; | |
483 | } | |
484 | ||
485 | void iscsit_add_cmd_to_immediate_queue( | |
486 | struct iscsi_cmd *cmd, | |
487 | struct iscsi_conn *conn, | |
488 | u8 state) | |
489 | { | |
490 | struct iscsi_queue_req *qr; | |
491 | ||
492 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
493 | if (!qr) { | |
494 | pr_err("Unable to allocate memory for" | |
495 | " struct iscsi_queue_req\n"); | |
496 | return; | |
497 | } | |
498 | INIT_LIST_HEAD(&qr->qr_list); | |
499 | qr->cmd = cmd; | |
500 | qr->state = state; | |
501 | ||
502 | spin_lock_bh(&conn->immed_queue_lock); | |
503 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); | |
504 | atomic_inc(&cmd->immed_queue_count); | |
505 | atomic_set(&conn->check_immediate_queue, 1); | |
506 | spin_unlock_bh(&conn->immed_queue_lock); | |
507 | ||
d5627acb | 508 | wake_up(&conn->queues_wq); |
e48354ce NB |
509 | } |
510 | ||
511 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) | |
512 | { | |
513 | struct iscsi_queue_req *qr; | |
514 | ||
515 | spin_lock_bh(&conn->immed_queue_lock); | |
516 | if (list_empty(&conn->immed_queue_list)) { | |
517 | spin_unlock_bh(&conn->immed_queue_lock); | |
518 | return NULL; | |
519 | } | |
1f981de5 RD |
520 | qr = list_first_entry(&conn->immed_queue_list, |
521 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
522 | |
523 | list_del(&qr->qr_list); | |
524 | if (qr->cmd) | |
525 | atomic_dec(&qr->cmd->immed_queue_count); | |
526 | spin_unlock_bh(&conn->immed_queue_lock); | |
527 | ||
528 | return qr; | |
529 | } | |
530 | ||
531 | static void iscsit_remove_cmd_from_immediate_queue( | |
532 | struct iscsi_cmd *cmd, | |
533 | struct iscsi_conn *conn) | |
534 | { | |
535 | struct iscsi_queue_req *qr, *qr_tmp; | |
536 | ||
537 | spin_lock_bh(&conn->immed_queue_lock); | |
538 | if (!atomic_read(&cmd->immed_queue_count)) { | |
539 | spin_unlock_bh(&conn->immed_queue_lock); | |
540 | return; | |
541 | } | |
542 | ||
543 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
544 | if (qr->cmd != cmd) | |
545 | continue; | |
546 | ||
547 | atomic_dec(&qr->cmd->immed_queue_count); | |
548 | list_del(&qr->qr_list); | |
549 | kmem_cache_free(lio_qr_cache, qr); | |
550 | } | |
551 | spin_unlock_bh(&conn->immed_queue_lock); | |
552 | ||
553 | if (atomic_read(&cmd->immed_queue_count)) { | |
554 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", | |
555 | cmd->init_task_tag, | |
556 | atomic_read(&cmd->immed_queue_count)); | |
557 | } | |
558 | } | |
559 | ||
560 | void iscsit_add_cmd_to_response_queue( | |
561 | struct iscsi_cmd *cmd, | |
562 | struct iscsi_conn *conn, | |
563 | u8 state) | |
564 | { | |
565 | struct iscsi_queue_req *qr; | |
566 | ||
567 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
568 | if (!qr) { | |
569 | pr_err("Unable to allocate memory for" | |
570 | " struct iscsi_queue_req\n"); | |
571 | return; | |
572 | } | |
573 | INIT_LIST_HEAD(&qr->qr_list); | |
574 | qr->cmd = cmd; | |
575 | qr->state = state; | |
576 | ||
577 | spin_lock_bh(&conn->response_queue_lock); | |
578 | list_add_tail(&qr->qr_list, &conn->response_queue_list); | |
579 | atomic_inc(&cmd->response_queue_count); | |
580 | spin_unlock_bh(&conn->response_queue_lock); | |
581 | ||
d5627acb | 582 | wake_up(&conn->queues_wq); |
e48354ce NB |
583 | } |
584 | ||
585 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) | |
586 | { | |
587 | struct iscsi_queue_req *qr; | |
588 | ||
589 | spin_lock_bh(&conn->response_queue_lock); | |
590 | if (list_empty(&conn->response_queue_list)) { | |
591 | spin_unlock_bh(&conn->response_queue_lock); | |
592 | return NULL; | |
593 | } | |
594 | ||
1f981de5 RD |
595 | qr = list_first_entry(&conn->response_queue_list, |
596 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
597 | |
598 | list_del(&qr->qr_list); | |
599 | if (qr->cmd) | |
600 | atomic_dec(&qr->cmd->response_queue_count); | |
601 | spin_unlock_bh(&conn->response_queue_lock); | |
602 | ||
603 | return qr; | |
604 | } | |
605 | ||
606 | static void iscsit_remove_cmd_from_response_queue( | |
607 | struct iscsi_cmd *cmd, | |
608 | struct iscsi_conn *conn) | |
609 | { | |
610 | struct iscsi_queue_req *qr, *qr_tmp; | |
611 | ||
612 | spin_lock_bh(&conn->response_queue_lock); | |
613 | if (!atomic_read(&cmd->response_queue_count)) { | |
614 | spin_unlock_bh(&conn->response_queue_lock); | |
615 | return; | |
616 | } | |
617 | ||
618 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
619 | qr_list) { | |
620 | if (qr->cmd != cmd) | |
621 | continue; | |
622 | ||
623 | atomic_dec(&qr->cmd->response_queue_count); | |
624 | list_del(&qr->qr_list); | |
625 | kmem_cache_free(lio_qr_cache, qr); | |
626 | } | |
627 | spin_unlock_bh(&conn->response_queue_lock); | |
628 | ||
629 | if (atomic_read(&cmd->response_queue_count)) { | |
630 | pr_err("ITT: 0x%08x response_queue_count: %d\n", | |
631 | cmd->init_task_tag, | |
632 | atomic_read(&cmd->response_queue_count)); | |
633 | } | |
634 | } | |
635 | ||
d5627acb RD |
636 | bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) |
637 | { | |
638 | bool empty; | |
639 | ||
640 | spin_lock_bh(&conn->immed_queue_lock); | |
641 | empty = list_empty(&conn->immed_queue_list); | |
642 | spin_unlock_bh(&conn->immed_queue_lock); | |
643 | ||
644 | if (!empty) | |
645 | return empty; | |
646 | ||
647 | spin_lock_bh(&conn->response_queue_lock); | |
648 | empty = list_empty(&conn->response_queue_list); | |
649 | spin_unlock_bh(&conn->response_queue_lock); | |
650 | ||
651 | return empty; | |
652 | } | |
653 | ||
e48354ce NB |
654 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) |
655 | { | |
656 | struct iscsi_queue_req *qr, *qr_tmp; | |
657 | ||
658 | spin_lock_bh(&conn->immed_queue_lock); | |
659 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
660 | list_del(&qr->qr_list); | |
661 | if (qr->cmd) | |
662 | atomic_dec(&qr->cmd->immed_queue_count); | |
663 | ||
664 | kmem_cache_free(lio_qr_cache, qr); | |
665 | } | |
666 | spin_unlock_bh(&conn->immed_queue_lock); | |
667 | ||
668 | spin_lock_bh(&conn->response_queue_lock); | |
669 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
670 | qr_list) { | |
671 | list_del(&qr->qr_list); | |
672 | if (qr->cmd) | |
673 | atomic_dec(&qr->cmd->response_queue_count); | |
674 | ||
675 | kmem_cache_free(lio_qr_cache, qr); | |
676 | } | |
677 | spin_unlock_bh(&conn->response_queue_lock); | |
678 | } | |
679 | ||
680 | void iscsit_release_cmd(struct iscsi_cmd *cmd) | |
681 | { | |
988e3a85 NB |
682 | struct iscsi_session *sess; |
683 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
684 | ||
685 | if (cmd->conn) | |
686 | sess = cmd->conn->sess; | |
687 | else | |
688 | sess = cmd->sess; | |
689 | ||
690 | BUG_ON(!sess || !sess->se_sess); | |
691 | ||
e48354ce NB |
692 | kfree(cmd->buf_ptr); |
693 | kfree(cmd->pdu_list); | |
694 | kfree(cmd->seq_list); | |
695 | kfree(cmd->tmr_req); | |
696 | kfree(cmd->iov_data); | |
9864ca9d | 697 | kfree(cmd->text_in_ptr); |
e48354ce | 698 | |
988e3a85 | 699 | percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); |
aafc9d15 | 700 | } |
d703ce2f | 701 | EXPORT_SYMBOL(iscsit_release_cmd); |
aafc9d15 NB |
702 | |
703 | static void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, | |
704 | bool check_queues) | |
705 | { | |
706 | struct iscsi_conn *conn = cmd->conn; | |
707 | ||
708 | if (scsi_cmd) { | |
709 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
710 | iscsit_stop_dataout_timer(cmd); | |
711 | iscsit_free_r2ts_from_list(cmd); | |
712 | } | |
713 | if (cmd->data_direction == DMA_FROM_DEVICE) | |
714 | iscsit_free_all_datain_reqs(cmd); | |
715 | } | |
716 | ||
717 | if (conn && check_queues) { | |
e48354ce NB |
718 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
719 | iscsit_remove_cmd_from_response_queue(cmd, conn); | |
720 | } | |
e48354ce NB |
721 | } |
722 | ||
aafc9d15 | 723 | void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) |
d270190a | 724 | { |
aafc9d15 NB |
725 | struct se_cmd *se_cmd = NULL; |
726 | int rc; | |
d270190a | 727 | /* |
20879696 | 728 | * Determine if a struct se_cmd is associated with |
d270190a NB |
729 | * this struct iscsi_cmd. |
730 | */ | |
731 | switch (cmd->iscsi_opcode) { | |
732 | case ISCSI_OP_SCSI_CMD: | |
aafc9d15 NB |
733 | se_cmd = &cmd->se_cmd; |
734 | __iscsit_free_cmd(cmd, true, shutdown); | |
cdb72665 NB |
735 | /* |
736 | * Fallthrough | |
737 | */ | |
d270190a | 738 | case ISCSI_OP_SCSI_TMFUNC: |
e255a285 | 739 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
740 | if (!rc && shutdown && se_cmd && se_cmd->se_sess) { |
741 | __iscsit_free_cmd(cmd, true, shutdown); | |
742 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
743 | } | |
d270190a | 744 | break; |
c1ce4bd5 NB |
745 | case ISCSI_OP_REJECT: |
746 | /* | |
747 | * Handle special case for REJECT when iscsi_add_reject*() has | |
748 | * overwritten the original iscsi_opcode assignment, and the | |
749 | * associated cmd->se_cmd needs to be released. | |
750 | */ | |
751 | if (cmd->se_cmd.se_tfo != NULL) { | |
aafc9d15 NB |
752 | se_cmd = &cmd->se_cmd; |
753 | __iscsit_free_cmd(cmd, true, shutdown); | |
754 | ||
e255a285 | 755 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
756 | if (!rc && shutdown && se_cmd->se_sess) { |
757 | __iscsit_free_cmd(cmd, true, shutdown); | |
758 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
759 | } | |
c1ce4bd5 NB |
760 | break; |
761 | } | |
762 | /* Fall-through */ | |
d270190a | 763 | default: |
aafc9d15 | 764 | __iscsit_free_cmd(cmd, false, shutdown); |
d703ce2f | 765 | iscsit_release_cmd(cmd); |
d270190a NB |
766 | break; |
767 | } | |
768 | } | |
769 | ||
e48354ce NB |
770 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
771 | { | |
772 | spin_lock_bh(&sess->session_usage_lock); | |
773 | if (sess->session_usage_count != 0) { | |
774 | sess->session_waiting_on_uc = 1; | |
775 | spin_unlock_bh(&sess->session_usage_lock); | |
776 | if (in_interrupt()) | |
777 | return 2; | |
778 | ||
779 | wait_for_completion(&sess->session_waiting_on_uc_comp); | |
780 | return 1; | |
781 | } | |
782 | spin_unlock_bh(&sess->session_usage_lock); | |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
787 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) | |
788 | { | |
789 | spin_lock_bh(&sess->session_usage_lock); | |
790 | sess->session_usage_count--; | |
791 | ||
792 | if (!sess->session_usage_count && sess->session_waiting_on_uc) | |
793 | complete(&sess->session_waiting_on_uc_comp); | |
794 | ||
795 | spin_unlock_bh(&sess->session_usage_lock); | |
796 | } | |
797 | ||
798 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) | |
799 | { | |
800 | spin_lock_bh(&sess->session_usage_lock); | |
801 | sess->session_usage_count++; | |
802 | spin_unlock_bh(&sess->session_usage_lock); | |
803 | } | |
804 | ||
e48354ce NB |
805 | /* |
806 | * Setup conn->if_marker and conn->of_marker values based upon | |
807 | * the initial marker-less interval. (see iSCSI v19 A.2) | |
808 | */ | |
809 | int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) | |
810 | { | |
811 | int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; | |
812 | /* | |
813 | * IFMarkInt and OFMarkInt are negotiated as 32-bit words. | |
814 | */ | |
815 | u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); | |
816 | u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); | |
817 | ||
818 | if (conn->conn_ops->OFMarker) { | |
819 | /* | |
820 | * Account for the first Login Command received not | |
821 | * via iscsi_recv_msg(). | |
822 | */ | |
823 | conn->of_marker += ISCSI_HDR_LEN; | |
824 | if (conn->of_marker <= OFMarkInt) { | |
825 | conn->of_marker = (OFMarkInt - conn->of_marker); | |
826 | } else { | |
827 | login_ofmarker_count = (conn->of_marker / OFMarkInt); | |
828 | next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + | |
829 | (login_ofmarker_count * MARKER_SIZE); | |
830 | conn->of_marker = (next_marker - conn->of_marker); | |
831 | } | |
832 | conn->of_marker_offset = 0; | |
833 | pr_debug("Setting OFMarker value to %u based on Initial" | |
834 | " Markerless Interval.\n", conn->of_marker); | |
835 | } | |
836 | ||
837 | if (conn->conn_ops->IFMarker) { | |
838 | if (conn->if_marker <= IFMarkInt) { | |
839 | conn->if_marker = (IFMarkInt - conn->if_marker); | |
840 | } else { | |
841 | login_ifmarker_count = (conn->if_marker / IFMarkInt); | |
842 | next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + | |
843 | (login_ifmarker_count * MARKER_SIZE); | |
844 | conn->if_marker = (next_marker - conn->if_marker); | |
845 | } | |
846 | pr_debug("Setting IFMarker value to %u based on Initial" | |
847 | " Markerless Interval.\n", conn->if_marker); | |
848 | } | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) | |
854 | { | |
855 | struct iscsi_conn *conn; | |
856 | ||
857 | spin_lock_bh(&sess->conn_lock); | |
858 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
859 | if ((conn->cid == cid) && | |
860 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { | |
861 | iscsit_inc_conn_usage_count(conn); | |
862 | spin_unlock_bh(&sess->conn_lock); | |
863 | return conn; | |
864 | } | |
865 | } | |
866 | spin_unlock_bh(&sess->conn_lock); | |
867 | ||
868 | return NULL; | |
869 | } | |
870 | ||
871 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) | |
872 | { | |
873 | struct iscsi_conn *conn; | |
874 | ||
875 | spin_lock_bh(&sess->conn_lock); | |
876 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
877 | if (conn->cid == cid) { | |
878 | iscsit_inc_conn_usage_count(conn); | |
879 | spin_lock(&conn->state_lock); | |
880 | atomic_set(&conn->connection_wait_rcfr, 1); | |
881 | spin_unlock(&conn->state_lock); | |
882 | spin_unlock_bh(&sess->conn_lock); | |
883 | return conn; | |
884 | } | |
885 | } | |
886 | spin_unlock_bh(&sess->conn_lock); | |
887 | ||
888 | return NULL; | |
889 | } | |
890 | ||
891 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) | |
892 | { | |
893 | spin_lock_bh(&conn->conn_usage_lock); | |
894 | if (conn->conn_usage_count != 0) { | |
895 | conn->conn_waiting_on_uc = 1; | |
896 | spin_unlock_bh(&conn->conn_usage_lock); | |
897 | ||
898 | wait_for_completion(&conn->conn_waiting_on_uc_comp); | |
899 | return; | |
900 | } | |
901 | spin_unlock_bh(&conn->conn_usage_lock); | |
902 | } | |
903 | ||
904 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) | |
905 | { | |
906 | spin_lock_bh(&conn->conn_usage_lock); | |
907 | conn->conn_usage_count--; | |
908 | ||
909 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) | |
910 | complete(&conn->conn_waiting_on_uc_comp); | |
911 | ||
912 | spin_unlock_bh(&conn->conn_usage_lock); | |
913 | } | |
914 | ||
915 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) | |
916 | { | |
917 | spin_lock_bh(&conn->conn_usage_lock); | |
918 | conn->conn_usage_count++; | |
919 | spin_unlock_bh(&conn->conn_usage_lock); | |
920 | } | |
921 | ||
922 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) | |
923 | { | |
924 | u8 state; | |
925 | struct iscsi_cmd *cmd; | |
926 | ||
927 | cmd = iscsit_allocate_cmd(conn, GFP_ATOMIC); | |
928 | if (!cmd) | |
929 | return -1; | |
930 | ||
931 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; | |
932 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : | |
933 | ISTATE_SEND_NOPIN_NO_RESPONSE; | |
66c7db68 | 934 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
935 | spin_lock_bh(&conn->sess->ttt_lock); |
936 | cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : | |
937 | 0xFFFFFFFF; | |
938 | if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) | |
939 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
940 | spin_unlock_bh(&conn->sess->ttt_lock); | |
941 | ||
942 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 943 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
944 | spin_unlock_bh(&conn->cmd_lock); |
945 | ||
946 | if (want_response) | |
947 | iscsit_start_nopin_response_timer(conn); | |
948 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | static void iscsit_handle_nopin_response_timeout(unsigned long data) | |
954 | { | |
955 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
956 | ||
957 | iscsit_inc_conn_usage_count(conn); | |
958 | ||
959 | spin_lock_bh(&conn->nopin_timer_lock); | |
960 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { | |
961 | spin_unlock_bh(&conn->nopin_timer_lock); | |
962 | iscsit_dec_conn_usage_count(conn); | |
963 | return; | |
964 | } | |
965 | ||
966 | pr_debug("Did not receive response to NOPIN on CID: %hu on" | |
967 | " SID: %u, failing connection.\n", conn->cid, | |
968 | conn->sess->sid); | |
969 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
970 | spin_unlock_bh(&conn->nopin_timer_lock); | |
971 | ||
972 | { | |
973 | struct iscsi_portal_group *tpg = conn->sess->tpg; | |
974 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
975 | ||
976 | if (tiqn) { | |
977 | spin_lock_bh(&tiqn->sess_err_stats.lock); | |
978 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
8359cf43 | 979 | conn->sess->sess_ops->InitiatorName); |
e48354ce NB |
980 | tiqn->sess_err_stats.last_sess_failure_type = |
981 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
982 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
983 | conn->sess->conn_timeout_errors++; | |
984 | spin_unlock_bh(&tiqn->sess_err_stats.lock); | |
985 | } | |
986 | } | |
987 | ||
988 | iscsit_cause_connection_reinstatement(conn, 0); | |
989 | iscsit_dec_conn_usage_count(conn); | |
990 | } | |
991 | ||
992 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) | |
993 | { | |
994 | struct iscsi_session *sess = conn->sess; | |
995 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
996 | ||
997 | spin_lock_bh(&conn->nopin_timer_lock); | |
998 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
999 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1000 | return; | |
1001 | } | |
1002 | ||
1003 | mod_timer(&conn->nopin_response_timer, | |
1004 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); | |
1005 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Called with conn->nopin_timer_lock held. | |
1010 | */ | |
1011 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) | |
1012 | { | |
1013 | struct iscsi_session *sess = conn->sess; | |
1014 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1015 | ||
1016 | spin_lock_bh(&conn->nopin_timer_lock); | |
1017 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { | |
1018 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1019 | return; | |
1020 | } | |
1021 | ||
1022 | init_timer(&conn->nopin_response_timer); | |
1023 | conn->nopin_response_timer.expires = | |
1024 | (get_jiffies_64() + na->nopin_response_timeout * HZ); | |
1025 | conn->nopin_response_timer.data = (unsigned long)conn; | |
1026 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; | |
1027 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; | |
1028 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; | |
1029 | add_timer(&conn->nopin_response_timer); | |
1030 | ||
1031 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" | |
1032 | " seconds\n", conn->cid, na->nopin_response_timeout); | |
1033 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1034 | } | |
1035 | ||
1036 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) | |
1037 | { | |
1038 | spin_lock_bh(&conn->nopin_timer_lock); | |
1039 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
1040 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1041 | return; | |
1042 | } | |
1043 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; | |
1044 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1045 | ||
1046 | del_timer_sync(&conn->nopin_response_timer); | |
1047 | ||
1048 | spin_lock_bh(&conn->nopin_timer_lock); | |
1049 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
1050 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1051 | } | |
1052 | ||
1053 | static void iscsit_handle_nopin_timeout(unsigned long data) | |
1054 | { | |
1055 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
1056 | ||
1057 | iscsit_inc_conn_usage_count(conn); | |
1058 | ||
1059 | spin_lock_bh(&conn->nopin_timer_lock); | |
1060 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { | |
1061 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1062 | iscsit_dec_conn_usage_count(conn); | |
1063 | return; | |
1064 | } | |
1065 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1066 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1067 | ||
1068 | iscsit_add_nopin(conn, 1); | |
1069 | iscsit_dec_conn_usage_count(conn); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Called with conn->nopin_timer_lock held. | |
1074 | */ | |
1075 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1076 | { | |
1077 | struct iscsi_session *sess = conn->sess; | |
1078 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1079 | /* | |
1080 | * NOPIN timeout is disabled. | |
1081 | */ | |
1082 | if (!na->nopin_timeout) | |
1083 | return; | |
1084 | ||
1085 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) | |
1086 | return; | |
1087 | ||
1088 | init_timer(&conn->nopin_timer); | |
1089 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1090 | conn->nopin_timer.data = (unsigned long)conn; | |
1091 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1092 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1093 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1094 | add_timer(&conn->nopin_timer); | |
1095 | ||
1096 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1097 | " interval\n", conn->cid, na->nopin_timeout); | |
1098 | } | |
1099 | ||
1100 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1101 | { | |
1102 | struct iscsi_session *sess = conn->sess; | |
1103 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1104 | /* | |
1105 | * NOPIN timeout is disabled.. | |
1106 | */ | |
1107 | if (!na->nopin_timeout) | |
1108 | return; | |
1109 | ||
1110 | spin_lock_bh(&conn->nopin_timer_lock); | |
1111 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { | |
1112 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1113 | return; | |
1114 | } | |
1115 | ||
1116 | init_timer(&conn->nopin_timer); | |
1117 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1118 | conn->nopin_timer.data = (unsigned long)conn; | |
1119 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1120 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1121 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1122 | add_timer(&conn->nopin_timer); | |
1123 | ||
1124 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1125 | " interval\n", conn->cid, na->nopin_timeout); | |
1126 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1127 | } | |
1128 | ||
1129 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) | |
1130 | { | |
1131 | spin_lock_bh(&conn->nopin_timer_lock); | |
1132 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { | |
1133 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1134 | return; | |
1135 | } | |
1136 | conn->nopin_timer_flags |= ISCSI_TF_STOP; | |
1137 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1138 | ||
1139 | del_timer_sync(&conn->nopin_timer); | |
1140 | ||
1141 | spin_lock_bh(&conn->nopin_timer_lock); | |
1142 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1143 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1144 | } | |
1145 | ||
1146 | int iscsit_send_tx_data( | |
1147 | struct iscsi_cmd *cmd, | |
1148 | struct iscsi_conn *conn, | |
1149 | int use_misc) | |
1150 | { | |
1151 | int tx_sent, tx_size; | |
1152 | u32 iov_count; | |
1153 | struct kvec *iov; | |
1154 | ||
1155 | send_data: | |
1156 | tx_size = cmd->tx_size; | |
1157 | ||
1158 | if (!use_misc) { | |
1159 | iov = &cmd->iov_data[0]; | |
1160 | iov_count = cmd->iov_data_count; | |
1161 | } else { | |
1162 | iov = &cmd->iov_misc[0]; | |
1163 | iov_count = cmd->iov_misc_count; | |
1164 | } | |
1165 | ||
1166 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); | |
1167 | if (tx_size != tx_sent) { | |
1168 | if (tx_sent == -EAGAIN) { | |
1169 | pr_err("tx_data() returned -EAGAIN\n"); | |
1170 | goto send_data; | |
1171 | } else | |
1172 | return -1; | |
1173 | } | |
1174 | cmd->tx_size = 0; | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | int iscsit_fe_sendpage_sg( | |
1180 | struct iscsi_cmd *cmd, | |
1181 | struct iscsi_conn *conn) | |
1182 | { | |
1183 | struct scatterlist *sg = cmd->first_data_sg; | |
1184 | struct kvec iov; | |
1185 | u32 tx_hdr_size, data_len; | |
1186 | u32 offset = cmd->first_data_sg_off; | |
40b05497 | 1187 | int tx_sent, iov_off; |
e48354ce NB |
1188 | |
1189 | send_hdr: | |
1190 | tx_hdr_size = ISCSI_HDR_LEN; | |
1191 | if (conn->conn_ops->HeaderDigest) | |
1192 | tx_hdr_size += ISCSI_CRC_LEN; | |
1193 | ||
1194 | iov.iov_base = cmd->pdu; | |
1195 | iov.iov_len = tx_hdr_size; | |
1196 | ||
1197 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); | |
1198 | if (tx_hdr_size != tx_sent) { | |
1199 | if (tx_sent == -EAGAIN) { | |
1200 | pr_err("tx_data() returned -EAGAIN\n"); | |
1201 | goto send_hdr; | |
1202 | } | |
1203 | return -1; | |
1204 | } | |
1205 | ||
1206 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; | |
40b05497 NB |
1207 | /* |
1208 | * Set iov_off used by padding and data digest tx_data() calls below | |
1209 | * in order to determine proper offset into cmd->iov_data[] | |
1210 | */ | |
1211 | if (conn->conn_ops->DataDigest) { | |
e48354ce | 1212 | data_len -= ISCSI_CRC_LEN; |
40b05497 NB |
1213 | if (cmd->padding) |
1214 | iov_off = (cmd->iov_data_count - 2); | |
1215 | else | |
1216 | iov_off = (cmd->iov_data_count - 1); | |
1217 | } else { | |
1218 | iov_off = (cmd->iov_data_count - 1); | |
1219 | } | |
e48354ce NB |
1220 | /* |
1221 | * Perform sendpage() for each page in the scatterlist | |
1222 | */ | |
1223 | while (data_len) { | |
1224 | u32 space = (sg->length - offset); | |
1225 | u32 sub_len = min_t(u32, data_len, space); | |
1226 | send_pg: | |
1227 | tx_sent = conn->sock->ops->sendpage(conn->sock, | |
1228 | sg_page(sg), sg->offset + offset, sub_len, 0); | |
1229 | if (tx_sent != sub_len) { | |
1230 | if (tx_sent == -EAGAIN) { | |
1231 | pr_err("tcp_sendpage() returned" | |
1232 | " -EAGAIN\n"); | |
1233 | goto send_pg; | |
1234 | } | |
1235 | ||
1236 | pr_err("tcp_sendpage() failure: %d\n", | |
1237 | tx_sent); | |
1238 | return -1; | |
1239 | } | |
1240 | ||
1241 | data_len -= sub_len; | |
1242 | offset = 0; | |
1243 | sg = sg_next(sg); | |
1244 | } | |
1245 | ||
1246 | send_padding: | |
1247 | if (cmd->padding) { | |
40b05497 | 1248 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
e48354ce NB |
1249 | |
1250 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); | |
1251 | if (cmd->padding != tx_sent) { | |
1252 | if (tx_sent == -EAGAIN) { | |
1253 | pr_err("tx_data() returned -EAGAIN\n"); | |
1254 | goto send_padding; | |
1255 | } | |
1256 | return -1; | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | send_datacrc: | |
1261 | if (conn->conn_ops->DataDigest) { | |
40b05497 | 1262 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
e48354ce NB |
1263 | |
1264 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); | |
1265 | if (ISCSI_CRC_LEN != tx_sent) { | |
1266 | if (tx_sent == -EAGAIN) { | |
1267 | pr_err("tx_data() returned -EAGAIN\n"); | |
1268 | goto send_datacrc; | |
1269 | } | |
1270 | return -1; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU | |
1279 | * back to the Initiator when an expection condition occurs with the | |
1280 | * errors set in status_class and status_detail. | |
1281 | * | |
1282 | * Parameters: iSCSI Connection, Status Class, Status Detail. | |
1283 | * Returns: 0 on success, -1 on error. | |
1284 | */ | |
1285 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) | |
1286 | { | |
e48354ce | 1287 | struct iscsi_login_rsp *hdr; |
baa4d64b | 1288 | struct iscsi_login *login = conn->conn_login; |
e48354ce | 1289 | |
baa4d64b | 1290 | login->login_failed = 1; |
e48354ce NB |
1291 | iscsit_collect_login_stats(conn, status_class, status_detail); |
1292 | ||
baa4d64b | 1293 | hdr = (struct iscsi_login_rsp *)&login->rsp[0]; |
e48354ce NB |
1294 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
1295 | hdr->status_class = status_class; | |
1296 | hdr->status_detail = status_detail; | |
66c7db68 | 1297 | hdr->itt = conn->login_itt; |
e48354ce | 1298 | |
baa4d64b | 1299 | return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); |
e48354ce NB |
1300 | } |
1301 | ||
1302 | void iscsit_print_session_params(struct iscsi_session *sess) | |
1303 | { | |
1304 | struct iscsi_conn *conn; | |
1305 | ||
1306 | pr_debug("-----------------------------[Session Params for" | |
1307 | " SID: %u]-----------------------------\n", sess->sid); | |
1308 | spin_lock_bh(&sess->conn_lock); | |
1309 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
1310 | iscsi_dump_conn_ops(conn->conn_ops); | |
1311 | spin_unlock_bh(&sess->conn_lock); | |
1312 | ||
1313 | iscsi_dump_sess_ops(sess->sess_ops); | |
1314 | } | |
1315 | ||
1316 | static int iscsit_do_rx_data( | |
1317 | struct iscsi_conn *conn, | |
1318 | struct iscsi_data_count *count) | |
1319 | { | |
1320 | int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; | |
2ff017f5 | 1321 | struct kvec *iov_p; |
e48354ce NB |
1322 | struct msghdr msg; |
1323 | ||
1324 | if (!conn || !conn->sock || !conn->conn_ops) | |
1325 | return -1; | |
1326 | ||
1327 | memset(&msg, 0, sizeof(struct msghdr)); | |
1328 | ||
2ff017f5 NB |
1329 | iov_p = count->iov; |
1330 | iov_len = count->iov_count; | |
e48354ce NB |
1331 | |
1332 | while (total_rx < data) { | |
1333 | rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, | |
1334 | (data - total_rx), MSG_WAITALL); | |
1335 | if (rx_loop <= 0) { | |
1336 | pr_debug("rx_loop: %d total_rx: %d\n", | |
1337 | rx_loop, total_rx); | |
1338 | return rx_loop; | |
1339 | } | |
1340 | total_rx += rx_loop; | |
1341 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", | |
1342 | rx_loop, total_rx, data); | |
1343 | } | |
1344 | ||
e48354ce NB |
1345 | return total_rx; |
1346 | } | |
1347 | ||
1348 | static int iscsit_do_tx_data( | |
1349 | struct iscsi_conn *conn, | |
1350 | struct iscsi_data_count *count) | |
1351 | { | |
1352 | int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; | |
2ff017f5 | 1353 | struct kvec *iov_p; |
e48354ce NB |
1354 | struct msghdr msg; |
1355 | ||
1356 | if (!conn || !conn->sock || !conn->conn_ops) | |
1357 | return -1; | |
1358 | ||
1359 | if (data <= 0) { | |
1360 | pr_err("Data length is: %d\n", data); | |
1361 | return -1; | |
1362 | } | |
1363 | ||
1364 | memset(&msg, 0, sizeof(struct msghdr)); | |
1365 | ||
2ff017f5 NB |
1366 | iov_p = count->iov; |
1367 | iov_len = count->iov_count; | |
e48354ce NB |
1368 | |
1369 | while (total_tx < data) { | |
1370 | tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, | |
1371 | (data - total_tx)); | |
1372 | if (tx_loop <= 0) { | |
1373 | pr_debug("tx_loop: %d total_tx %d\n", | |
1374 | tx_loop, total_tx); | |
1375 | return tx_loop; | |
1376 | } | |
1377 | total_tx += tx_loop; | |
1378 | pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", | |
1379 | tx_loop, total_tx, data); | |
1380 | } | |
1381 | ||
e48354ce NB |
1382 | return total_tx; |
1383 | } | |
1384 | ||
1385 | int rx_data( | |
1386 | struct iscsi_conn *conn, | |
1387 | struct kvec *iov, | |
1388 | int iov_count, | |
1389 | int data) | |
1390 | { | |
1391 | struct iscsi_data_count c; | |
1392 | ||
1393 | if (!conn || !conn->sock || !conn->conn_ops) | |
1394 | return -1; | |
1395 | ||
1396 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1397 | c.iov = iov; | |
1398 | c.iov_count = iov_count; | |
1399 | c.data_length = data; | |
1400 | c.type = ISCSI_RX_DATA; | |
1401 | ||
e48354ce NB |
1402 | return iscsit_do_rx_data(conn, &c); |
1403 | } | |
1404 | ||
1405 | int tx_data( | |
1406 | struct iscsi_conn *conn, | |
1407 | struct kvec *iov, | |
1408 | int iov_count, | |
1409 | int data) | |
1410 | { | |
1411 | struct iscsi_data_count c; | |
1412 | ||
1413 | if (!conn || !conn->sock || !conn->conn_ops) | |
1414 | return -1; | |
1415 | ||
1416 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1417 | c.iov = iov; | |
1418 | c.iov_count = iov_count; | |
1419 | c.data_length = data; | |
1420 | c.type = ISCSI_TX_DATA; | |
1421 | ||
e48354ce NB |
1422 | return iscsit_do_tx_data(conn, &c); |
1423 | } | |
1424 | ||
1425 | void iscsit_collect_login_stats( | |
1426 | struct iscsi_conn *conn, | |
1427 | u8 status_class, | |
1428 | u8 status_detail) | |
1429 | { | |
1430 | struct iscsi_param *intrname = NULL; | |
1431 | struct iscsi_tiqn *tiqn; | |
1432 | struct iscsi_login_stats *ls; | |
1433 | ||
1434 | tiqn = iscsit_snmp_get_tiqn(conn); | |
1435 | if (!tiqn) | |
1436 | return; | |
1437 | ||
1438 | ls = &tiqn->login_stats; | |
1439 | ||
1440 | spin_lock(&ls->lock); | |
1441 | if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && | |
1442 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { | |
1443 | /* We already have the failure info for this login */ | |
1444 | spin_unlock(&ls->lock); | |
1445 | return; | |
1446 | } | |
1447 | ||
1448 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) | |
1449 | ls->accepts++; | |
1450 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { | |
1451 | ls->redirects++; | |
1452 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; | |
1453 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1454 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { | |
1455 | ls->authenticate_fails++; | |
1456 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; | |
1457 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1458 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { | |
1459 | ls->authorize_fails++; | |
1460 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; | |
1461 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1462 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { | |
1463 | ls->negotiate_fails++; | |
1464 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; | |
1465 | } else { | |
1466 | ls->other_fails++; | |
1467 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; | |
1468 | } | |
1469 | ||
1470 | /* Save initiator name, ip address and time, if it is a failed login */ | |
1471 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { | |
1472 | if (conn->param_list) | |
1473 | intrname = iscsi_find_param_from_key(INITIATORNAME, | |
1474 | conn->param_list); | |
1475 | strcpy(ls->last_intr_fail_name, | |
1476 | (intrname ? intrname->value : "Unknown")); | |
1477 | ||
baa4d64b NB |
1478 | ls->last_intr_fail_ip_family = conn->login_family; |
1479 | ||
e48354ce NB |
1480 | snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, |
1481 | "%s", conn->login_ip); | |
1482 | ls->last_fail_time = get_jiffies_64(); | |
1483 | } | |
1484 | ||
1485 | spin_unlock(&ls->lock); | |
1486 | } | |
1487 | ||
1488 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) | |
1489 | { | |
1490 | struct iscsi_portal_group *tpg; | |
1491 | ||
1492 | if (!conn || !conn->sess) | |
1493 | return NULL; | |
1494 | ||
1495 | tpg = conn->sess->tpg; | |
1496 | if (!tpg) | |
1497 | return NULL; | |
1498 | ||
1499 | if (!tpg->tpg_tiqn) | |
1500 | return NULL; | |
1501 | ||
1502 | return tpg->tpg_tiqn; | |
1503 | } |