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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 | */ | |
676687c6 | 155 | struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) |
e48354ce NB |
156 | { |
157 | struct iscsi_cmd *cmd; | |
988e3a85 | 158 | struct se_session *se_sess = conn->sess->se_sess; |
676687c6 | 159 | int size, tag; |
6f6b5d1e KO |
160 | |
161 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); | |
162 | if (tag < 0) | |
163 | return NULL; | |
e48354ce | 164 | |
988e3a85 NB |
165 | size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; |
166 | cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); | |
167 | memset(cmd, 0, size); | |
168 | ||
169 | cmd->se_cmd.map_tag = tag; | |
cdb72665 | 170 | cmd->conn = conn; |
2fbb471e | 171 | INIT_LIST_HEAD(&cmd->i_conn_node); |
e48354ce NB |
172 | INIT_LIST_HEAD(&cmd->datain_list); |
173 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); | |
e48354ce NB |
174 | spin_lock_init(&cmd->datain_lock); |
175 | spin_lock_init(&cmd->dataout_timeout_lock); | |
176 | spin_lock_init(&cmd->istate_lock); | |
177 | spin_lock_init(&cmd->error_lock); | |
178 | spin_lock_init(&cmd->r2t_lock); | |
179 | ||
180 | return cmd; | |
181 | } | |
cdb72665 | 182 | EXPORT_SYMBOL(iscsit_allocate_cmd); |
e48354ce | 183 | |
e48354ce NB |
184 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
185 | struct iscsi_cmd *cmd, | |
186 | u32 seq_send_order) | |
187 | { | |
188 | u32 i; | |
189 | ||
190 | for (i = 0; i < cmd->seq_count; i++) | |
191 | if (cmd->seq_list[i].seq_send_order == seq_send_order) | |
192 | return &cmd->seq_list[i]; | |
193 | ||
194 | return NULL; | |
195 | } | |
196 | ||
197 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) | |
198 | { | |
199 | u32 i; | |
200 | ||
201 | if (!cmd->seq_list) { | |
202 | pr_err("struct iscsi_cmd->seq_list is NULL!\n"); | |
203 | return NULL; | |
204 | } | |
205 | ||
206 | for (i = 0; i < cmd->seq_count; i++) { | |
207 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) | |
208 | continue; | |
209 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { | |
210 | cmd->seq_send_order++; | |
211 | return &cmd->seq_list[i]; | |
212 | } | |
213 | } | |
214 | ||
215 | return NULL; | |
216 | } | |
217 | ||
218 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( | |
219 | struct iscsi_cmd *cmd, | |
220 | u32 r2t_sn) | |
221 | { | |
222 | struct iscsi_r2t *r2t; | |
223 | ||
224 | spin_lock_bh(&cmd->r2t_lock); | |
225 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
226 | if (r2t->r2t_sn == r2t_sn) { | |
227 | spin_unlock_bh(&cmd->r2t_lock); | |
228 | return r2t; | |
229 | } | |
230 | } | |
231 | spin_unlock_bh(&cmd->r2t_lock); | |
232 | ||
233 | return NULL; | |
234 | } | |
235 | ||
236 | static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) | |
237 | { | |
238 | int ret; | |
239 | ||
240 | /* | |
241 | * This is the proper method of checking received CmdSN against | |
242 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out | |
243 | * or order CmdSNs due to multiple connection sessions and/or | |
244 | * CRC failures. | |
245 | */ | |
246 | if (iscsi_sna_gt(cmdsn, sess->max_cmd_sn)) { | |
247 | pr_err("Received CmdSN: 0x%08x is greater than" | |
ea7e32be | 248 | " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, |
e48354ce | 249 | sess->max_cmd_sn); |
ea7e32be | 250 | ret = CMDSN_MAXCMDSN_OVERRUN; |
e48354ce NB |
251 | |
252 | } else if (cmdsn == sess->exp_cmd_sn) { | |
253 | sess->exp_cmd_sn++; | |
254 | pr_debug("Received CmdSN matches ExpCmdSN," | |
255 | " incremented ExpCmdSN to: 0x%08x\n", | |
256 | sess->exp_cmd_sn); | |
257 | ret = CMDSN_NORMAL_OPERATION; | |
258 | ||
259 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { | |
260 | pr_debug("Received CmdSN: 0x%08x is greater" | |
261 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", | |
262 | cmdsn, sess->exp_cmd_sn); | |
263 | ret = CMDSN_HIGHER_THAN_EXP; | |
264 | ||
265 | } else { | |
266 | pr_err("Received CmdSN: 0x%08x is less than" | |
267 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, | |
268 | sess->exp_cmd_sn); | |
269 | ret = CMDSN_LOWER_THAN_EXP; | |
270 | } | |
271 | ||
272 | return ret; | |
273 | } | |
274 | ||
275 | /* | |
276 | * Commands may be received out of order if MC/S is in use. | |
277 | * Ensure they are executed in CmdSN order. | |
278 | */ | |
561bf158 NB |
279 | int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
280 | unsigned char *buf, __be32 cmdsn) | |
e48354ce | 281 | { |
561bf158 NB |
282 | int ret, cmdsn_ret; |
283 | bool reject = false; | |
284 | u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; | |
e48354ce NB |
285 | |
286 | mutex_lock(&conn->sess->cmdsn_mutex); | |
287 | ||
50e5c87d | 288 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); |
e48354ce NB |
289 | switch (cmdsn_ret) { |
290 | case CMDSN_NORMAL_OPERATION: | |
291 | ret = iscsit_execute_cmd(cmd, 0); | |
292 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) | |
293 | iscsit_execute_ooo_cmdsns(conn->sess); | |
561bf158 NB |
294 | else if (ret < 0) { |
295 | reject = true; | |
296 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
297 | } | |
e48354ce NB |
298 | break; |
299 | case CMDSN_HIGHER_THAN_EXP: | |
50e5c87d | 300 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); |
561bf158 NB |
301 | if (ret < 0) { |
302 | reject = true; | |
303 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
304 | break; | |
305 | } | |
306 | ret = CMDSN_HIGHER_THAN_EXP; | |
e48354ce NB |
307 | break; |
308 | case CMDSN_LOWER_THAN_EXP: | |
ea7e32be NB |
309 | case CMDSN_MAXCMDSN_OVERRUN: |
310 | default: | |
e48354ce NB |
311 | cmd->i_state = ISTATE_REMOVE; |
312 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
ea7e32be NB |
313 | /* |
314 | * Existing callers for iscsit_sequence_cmd() will silently | |
315 | * ignore commands with CMDSN_LOWER_THAN_EXP, so force this | |
316 | * return for CMDSN_MAXCMDSN_OVERRUN as well.. | |
317 | */ | |
318 | ret = CMDSN_LOWER_THAN_EXP; | |
e48354ce NB |
319 | break; |
320 | } | |
321 | mutex_unlock(&conn->sess->cmdsn_mutex); | |
322 | ||
561bf158 NB |
323 | if (reject) |
324 | iscsit_reject_cmd(cmd, reason, buf); | |
325 | ||
e48354ce NB |
326 | return ret; |
327 | } | |
3e1c81a9 | 328 | EXPORT_SYMBOL(iscsit_sequence_cmd); |
e48354ce NB |
329 | |
330 | int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) | |
331 | { | |
332 | struct iscsi_conn *conn = cmd->conn; | |
333 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
334 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
335 | u32 payload_length = ntoh24(hdr->dlength); | |
336 | ||
337 | if (conn->sess->sess_ops->InitialR2T) { | |
338 | pr_err("Received unexpected unsolicited data" | |
339 | " while InitialR2T=Yes, protocol error.\n"); | |
340 | transport_send_check_condition_and_sense(se_cmd, | |
341 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
342 | return -1; | |
343 | } | |
344 | ||
345 | if ((cmd->first_burst_len + payload_length) > | |
346 | conn->sess->sess_ops->FirstBurstLength) { | |
347 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" | |
348 | " for this Unsolicited DataOut Burst.\n", | |
349 | (cmd->first_burst_len + payload_length), | |
350 | conn->sess->sess_ops->FirstBurstLength); | |
351 | transport_send_check_condition_and_sense(se_cmd, | |
352 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
353 | return -1; | |
354 | } | |
355 | ||
356 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) | |
357 | return 0; | |
358 | ||
ebf1d95c | 359 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
e48354ce NB |
360 | ((cmd->first_burst_len + payload_length) != |
361 | conn->sess->sess_ops->FirstBurstLength)) { | |
362 | pr_err("Unsolicited non-immediate data received %u" | |
363 | " does not equal FirstBurstLength: %u, and does" | |
364 | " not equal ExpXferLen %u.\n", | |
365 | (cmd->first_burst_len + payload_length), | |
ebf1d95c | 366 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
e48354ce NB |
367 | transport_send_check_condition_and_sense(se_cmd, |
368 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
369 | return -1; | |
370 | } | |
371 | return 0; | |
372 | } | |
373 | ||
374 | struct iscsi_cmd *iscsit_find_cmd_from_itt( | |
375 | struct iscsi_conn *conn, | |
66c7db68 | 376 | itt_t init_task_tag) |
e48354ce NB |
377 | { |
378 | struct iscsi_cmd *cmd; | |
379 | ||
380 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 381 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
382 | if (cmd->init_task_tag == init_task_tag) { |
383 | spin_unlock_bh(&conn->cmd_lock); | |
384 | return cmd; | |
385 | } | |
386 | } | |
387 | spin_unlock_bh(&conn->cmd_lock); | |
388 | ||
389 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", | |
390 | init_task_tag, conn->cid); | |
391 | return NULL; | |
392 | } | |
393 | ||
394 | struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump( | |
395 | struct iscsi_conn *conn, | |
66c7db68 | 396 | itt_t init_task_tag, |
e48354ce NB |
397 | u32 length) |
398 | { | |
399 | struct iscsi_cmd *cmd; | |
400 | ||
401 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 402 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
403 | if (cmd->init_task_tag == init_task_tag) { |
404 | spin_unlock_bh(&conn->cmd_lock); | |
405 | return cmd; | |
406 | } | |
407 | } | |
408 | spin_unlock_bh(&conn->cmd_lock); | |
409 | ||
410 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," | |
411 | " dumping payload\n", init_task_tag, conn->cid); | |
412 | if (length) | |
413 | iscsit_dump_data_payload(conn, length, 1); | |
414 | ||
415 | return NULL; | |
416 | } | |
417 | ||
418 | struct iscsi_cmd *iscsit_find_cmd_from_ttt( | |
419 | struct iscsi_conn *conn, | |
420 | u32 targ_xfer_tag) | |
421 | { | |
422 | struct iscsi_cmd *cmd = NULL; | |
423 | ||
424 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 425 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
426 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
427 | spin_unlock_bh(&conn->cmd_lock); | |
428 | return cmd; | |
429 | } | |
430 | } | |
431 | spin_unlock_bh(&conn->cmd_lock); | |
432 | ||
433 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", | |
434 | targ_xfer_tag, conn->cid); | |
435 | return NULL; | |
436 | } | |
437 | ||
438 | int iscsit_find_cmd_for_recovery( | |
439 | struct iscsi_session *sess, | |
440 | struct iscsi_cmd **cmd_ptr, | |
441 | struct iscsi_conn_recovery **cr_ptr, | |
66c7db68 | 442 | itt_t init_task_tag) |
e48354ce NB |
443 | { |
444 | struct iscsi_cmd *cmd = NULL; | |
445 | struct iscsi_conn_recovery *cr; | |
446 | /* | |
447 | * Scan through the inactive connection recovery list's command list. | |
448 | * If init_task_tag matches the command is still alligent. | |
449 | */ | |
450 | spin_lock(&sess->cr_i_lock); | |
451 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { | |
452 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 453 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
454 | if (cmd->init_task_tag == init_task_tag) { |
455 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
456 | spin_unlock(&sess->cr_i_lock); | |
457 | ||
458 | *cr_ptr = cr; | |
459 | *cmd_ptr = cmd; | |
460 | return -2; | |
461 | } | |
462 | } | |
463 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
464 | } | |
465 | spin_unlock(&sess->cr_i_lock); | |
466 | /* | |
467 | * Scan through the active connection recovery list's command list. | |
468 | * If init_task_tag matches the command is ready to be reassigned. | |
469 | */ | |
470 | spin_lock(&sess->cr_a_lock); | |
471 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { | |
472 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 473 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
474 | if (cmd->init_task_tag == init_task_tag) { |
475 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
476 | spin_unlock(&sess->cr_a_lock); | |
477 | ||
478 | *cr_ptr = cr; | |
479 | *cmd_ptr = cmd; | |
480 | return 0; | |
481 | } | |
482 | } | |
483 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
484 | } | |
485 | spin_unlock(&sess->cr_a_lock); | |
486 | ||
487 | return -1; | |
488 | } | |
489 | ||
490 | void iscsit_add_cmd_to_immediate_queue( | |
491 | struct iscsi_cmd *cmd, | |
492 | struct iscsi_conn *conn, | |
493 | u8 state) | |
494 | { | |
495 | struct iscsi_queue_req *qr; | |
496 | ||
497 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
498 | if (!qr) { | |
499 | pr_err("Unable to allocate memory for" | |
500 | " struct iscsi_queue_req\n"); | |
501 | return; | |
502 | } | |
503 | INIT_LIST_HEAD(&qr->qr_list); | |
504 | qr->cmd = cmd; | |
505 | qr->state = state; | |
506 | ||
507 | spin_lock_bh(&conn->immed_queue_lock); | |
508 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); | |
509 | atomic_inc(&cmd->immed_queue_count); | |
510 | atomic_set(&conn->check_immediate_queue, 1); | |
511 | spin_unlock_bh(&conn->immed_queue_lock); | |
512 | ||
d5627acb | 513 | wake_up(&conn->queues_wq); |
e48354ce NB |
514 | } |
515 | ||
516 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) | |
517 | { | |
518 | struct iscsi_queue_req *qr; | |
519 | ||
520 | spin_lock_bh(&conn->immed_queue_lock); | |
521 | if (list_empty(&conn->immed_queue_list)) { | |
522 | spin_unlock_bh(&conn->immed_queue_lock); | |
523 | return NULL; | |
524 | } | |
1f981de5 RD |
525 | qr = list_first_entry(&conn->immed_queue_list, |
526 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
527 | |
528 | list_del(&qr->qr_list); | |
529 | if (qr->cmd) | |
530 | atomic_dec(&qr->cmd->immed_queue_count); | |
531 | spin_unlock_bh(&conn->immed_queue_lock); | |
532 | ||
533 | return qr; | |
534 | } | |
535 | ||
536 | static void iscsit_remove_cmd_from_immediate_queue( | |
537 | struct iscsi_cmd *cmd, | |
538 | struct iscsi_conn *conn) | |
539 | { | |
540 | struct iscsi_queue_req *qr, *qr_tmp; | |
541 | ||
542 | spin_lock_bh(&conn->immed_queue_lock); | |
543 | if (!atomic_read(&cmd->immed_queue_count)) { | |
544 | spin_unlock_bh(&conn->immed_queue_lock); | |
545 | return; | |
546 | } | |
547 | ||
548 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
549 | if (qr->cmd != cmd) | |
550 | continue; | |
551 | ||
552 | atomic_dec(&qr->cmd->immed_queue_count); | |
553 | list_del(&qr->qr_list); | |
554 | kmem_cache_free(lio_qr_cache, qr); | |
555 | } | |
556 | spin_unlock_bh(&conn->immed_queue_lock); | |
557 | ||
558 | if (atomic_read(&cmd->immed_queue_count)) { | |
559 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", | |
560 | cmd->init_task_tag, | |
561 | atomic_read(&cmd->immed_queue_count)); | |
562 | } | |
563 | } | |
564 | ||
565 | void iscsit_add_cmd_to_response_queue( | |
566 | struct iscsi_cmd *cmd, | |
567 | struct iscsi_conn *conn, | |
568 | u8 state) | |
569 | { | |
570 | struct iscsi_queue_req *qr; | |
571 | ||
572 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
573 | if (!qr) { | |
574 | pr_err("Unable to allocate memory for" | |
575 | " struct iscsi_queue_req\n"); | |
576 | return; | |
577 | } | |
578 | INIT_LIST_HEAD(&qr->qr_list); | |
579 | qr->cmd = cmd; | |
580 | qr->state = state; | |
581 | ||
582 | spin_lock_bh(&conn->response_queue_lock); | |
583 | list_add_tail(&qr->qr_list, &conn->response_queue_list); | |
584 | atomic_inc(&cmd->response_queue_count); | |
585 | spin_unlock_bh(&conn->response_queue_lock); | |
586 | ||
d5627acb | 587 | wake_up(&conn->queues_wq); |
e48354ce NB |
588 | } |
589 | ||
590 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) | |
591 | { | |
592 | struct iscsi_queue_req *qr; | |
593 | ||
594 | spin_lock_bh(&conn->response_queue_lock); | |
595 | if (list_empty(&conn->response_queue_list)) { | |
596 | spin_unlock_bh(&conn->response_queue_lock); | |
597 | return NULL; | |
598 | } | |
599 | ||
1f981de5 RD |
600 | qr = list_first_entry(&conn->response_queue_list, |
601 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
602 | |
603 | list_del(&qr->qr_list); | |
604 | if (qr->cmd) | |
605 | atomic_dec(&qr->cmd->response_queue_count); | |
606 | spin_unlock_bh(&conn->response_queue_lock); | |
607 | ||
608 | return qr; | |
609 | } | |
610 | ||
611 | static void iscsit_remove_cmd_from_response_queue( | |
612 | struct iscsi_cmd *cmd, | |
613 | struct iscsi_conn *conn) | |
614 | { | |
615 | struct iscsi_queue_req *qr, *qr_tmp; | |
616 | ||
617 | spin_lock_bh(&conn->response_queue_lock); | |
618 | if (!atomic_read(&cmd->response_queue_count)) { | |
619 | spin_unlock_bh(&conn->response_queue_lock); | |
620 | return; | |
621 | } | |
622 | ||
623 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
624 | qr_list) { | |
625 | if (qr->cmd != cmd) | |
626 | continue; | |
627 | ||
628 | atomic_dec(&qr->cmd->response_queue_count); | |
629 | list_del(&qr->qr_list); | |
630 | kmem_cache_free(lio_qr_cache, qr); | |
631 | } | |
632 | spin_unlock_bh(&conn->response_queue_lock); | |
633 | ||
634 | if (atomic_read(&cmd->response_queue_count)) { | |
635 | pr_err("ITT: 0x%08x response_queue_count: %d\n", | |
636 | cmd->init_task_tag, | |
637 | atomic_read(&cmd->response_queue_count)); | |
638 | } | |
639 | } | |
640 | ||
d5627acb RD |
641 | bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) |
642 | { | |
643 | bool empty; | |
644 | ||
645 | spin_lock_bh(&conn->immed_queue_lock); | |
646 | empty = list_empty(&conn->immed_queue_list); | |
647 | spin_unlock_bh(&conn->immed_queue_lock); | |
648 | ||
649 | if (!empty) | |
650 | return empty; | |
651 | ||
652 | spin_lock_bh(&conn->response_queue_lock); | |
653 | empty = list_empty(&conn->response_queue_list); | |
654 | spin_unlock_bh(&conn->response_queue_lock); | |
655 | ||
656 | return empty; | |
657 | } | |
658 | ||
e48354ce NB |
659 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) |
660 | { | |
661 | struct iscsi_queue_req *qr, *qr_tmp; | |
662 | ||
663 | spin_lock_bh(&conn->immed_queue_lock); | |
664 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
665 | list_del(&qr->qr_list); | |
666 | if (qr->cmd) | |
667 | atomic_dec(&qr->cmd->immed_queue_count); | |
668 | ||
669 | kmem_cache_free(lio_qr_cache, qr); | |
670 | } | |
671 | spin_unlock_bh(&conn->immed_queue_lock); | |
672 | ||
673 | spin_lock_bh(&conn->response_queue_lock); | |
674 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
675 | qr_list) { | |
676 | list_del(&qr->qr_list); | |
677 | if (qr->cmd) | |
678 | atomic_dec(&qr->cmd->response_queue_count); | |
679 | ||
680 | kmem_cache_free(lio_qr_cache, qr); | |
681 | } | |
682 | spin_unlock_bh(&conn->response_queue_lock); | |
683 | } | |
684 | ||
685 | void iscsit_release_cmd(struct iscsi_cmd *cmd) | |
686 | { | |
988e3a85 NB |
687 | struct iscsi_session *sess; |
688 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
689 | ||
690 | if (cmd->conn) | |
691 | sess = cmd->conn->sess; | |
692 | else | |
693 | sess = cmd->sess; | |
694 | ||
695 | BUG_ON(!sess || !sess->se_sess); | |
696 | ||
e48354ce NB |
697 | kfree(cmd->buf_ptr); |
698 | kfree(cmd->pdu_list); | |
699 | kfree(cmd->seq_list); | |
700 | kfree(cmd->tmr_req); | |
701 | kfree(cmd->iov_data); | |
9864ca9d | 702 | kfree(cmd->text_in_ptr); |
e48354ce | 703 | |
988e3a85 | 704 | percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); |
aafc9d15 | 705 | } |
d703ce2f | 706 | EXPORT_SYMBOL(iscsit_release_cmd); |
aafc9d15 | 707 | |
131e6abc NB |
708 | void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, |
709 | bool check_queues) | |
aafc9d15 NB |
710 | { |
711 | struct iscsi_conn *conn = cmd->conn; | |
712 | ||
713 | if (scsi_cmd) { | |
714 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
715 | iscsit_stop_dataout_timer(cmd); | |
716 | iscsit_free_r2ts_from_list(cmd); | |
717 | } | |
718 | if (cmd->data_direction == DMA_FROM_DEVICE) | |
719 | iscsit_free_all_datain_reqs(cmd); | |
720 | } | |
721 | ||
722 | if (conn && check_queues) { | |
e48354ce NB |
723 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
724 | iscsit_remove_cmd_from_response_queue(cmd, conn); | |
725 | } | |
e48354ce NB |
726 | } |
727 | ||
aafc9d15 | 728 | void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) |
d270190a | 729 | { |
aafc9d15 NB |
730 | struct se_cmd *se_cmd = NULL; |
731 | int rc; | |
d270190a | 732 | /* |
20879696 | 733 | * Determine if a struct se_cmd is associated with |
d270190a NB |
734 | * this struct iscsi_cmd. |
735 | */ | |
736 | switch (cmd->iscsi_opcode) { | |
737 | case ISCSI_OP_SCSI_CMD: | |
aafc9d15 NB |
738 | se_cmd = &cmd->se_cmd; |
739 | __iscsit_free_cmd(cmd, true, shutdown); | |
cdb72665 NB |
740 | /* |
741 | * Fallthrough | |
742 | */ | |
d270190a | 743 | case ISCSI_OP_SCSI_TMFUNC: |
e255a285 | 744 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
745 | if (!rc && shutdown && se_cmd && se_cmd->se_sess) { |
746 | __iscsit_free_cmd(cmd, true, shutdown); | |
747 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
748 | } | |
d270190a | 749 | break; |
c1ce4bd5 NB |
750 | case ISCSI_OP_REJECT: |
751 | /* | |
752 | * Handle special case for REJECT when iscsi_add_reject*() has | |
753 | * overwritten the original iscsi_opcode assignment, and the | |
754 | * associated cmd->se_cmd needs to be released. | |
755 | */ | |
756 | if (cmd->se_cmd.se_tfo != NULL) { | |
aafc9d15 NB |
757 | se_cmd = &cmd->se_cmd; |
758 | __iscsit_free_cmd(cmd, true, shutdown); | |
759 | ||
e255a285 | 760 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
761 | if (!rc && shutdown && se_cmd->se_sess) { |
762 | __iscsit_free_cmd(cmd, true, shutdown); | |
763 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
764 | } | |
c1ce4bd5 NB |
765 | break; |
766 | } | |
767 | /* Fall-through */ | |
d270190a | 768 | default: |
aafc9d15 | 769 | __iscsit_free_cmd(cmd, false, shutdown); |
d703ce2f | 770 | iscsit_release_cmd(cmd); |
d270190a NB |
771 | break; |
772 | } | |
773 | } | |
774 | ||
e48354ce NB |
775 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
776 | { | |
777 | spin_lock_bh(&sess->session_usage_lock); | |
778 | if (sess->session_usage_count != 0) { | |
779 | sess->session_waiting_on_uc = 1; | |
780 | spin_unlock_bh(&sess->session_usage_lock); | |
781 | if (in_interrupt()) | |
782 | return 2; | |
783 | ||
784 | wait_for_completion(&sess->session_waiting_on_uc_comp); | |
785 | return 1; | |
786 | } | |
787 | spin_unlock_bh(&sess->session_usage_lock); | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
792 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) | |
793 | { | |
794 | spin_lock_bh(&sess->session_usage_lock); | |
795 | sess->session_usage_count--; | |
796 | ||
797 | if (!sess->session_usage_count && sess->session_waiting_on_uc) | |
798 | complete(&sess->session_waiting_on_uc_comp); | |
799 | ||
800 | spin_unlock_bh(&sess->session_usage_lock); | |
801 | } | |
802 | ||
803 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) | |
804 | { | |
805 | spin_lock_bh(&sess->session_usage_lock); | |
806 | sess->session_usage_count++; | |
807 | spin_unlock_bh(&sess->session_usage_lock); | |
808 | } | |
809 | ||
e48354ce NB |
810 | /* |
811 | * Setup conn->if_marker and conn->of_marker values based upon | |
812 | * the initial marker-less interval. (see iSCSI v19 A.2) | |
813 | */ | |
814 | int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) | |
815 | { | |
816 | int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; | |
817 | /* | |
818 | * IFMarkInt and OFMarkInt are negotiated as 32-bit words. | |
819 | */ | |
820 | u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); | |
821 | u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); | |
822 | ||
823 | if (conn->conn_ops->OFMarker) { | |
824 | /* | |
825 | * Account for the first Login Command received not | |
826 | * via iscsi_recv_msg(). | |
827 | */ | |
828 | conn->of_marker += ISCSI_HDR_LEN; | |
829 | if (conn->of_marker <= OFMarkInt) { | |
830 | conn->of_marker = (OFMarkInt - conn->of_marker); | |
831 | } else { | |
832 | login_ofmarker_count = (conn->of_marker / OFMarkInt); | |
833 | next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + | |
834 | (login_ofmarker_count * MARKER_SIZE); | |
835 | conn->of_marker = (next_marker - conn->of_marker); | |
836 | } | |
837 | conn->of_marker_offset = 0; | |
838 | pr_debug("Setting OFMarker value to %u based on Initial" | |
839 | " Markerless Interval.\n", conn->of_marker); | |
840 | } | |
841 | ||
842 | if (conn->conn_ops->IFMarker) { | |
843 | if (conn->if_marker <= IFMarkInt) { | |
844 | conn->if_marker = (IFMarkInt - conn->if_marker); | |
845 | } else { | |
846 | login_ifmarker_count = (conn->if_marker / IFMarkInt); | |
847 | next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + | |
848 | (login_ifmarker_count * MARKER_SIZE); | |
849 | conn->if_marker = (next_marker - conn->if_marker); | |
850 | } | |
851 | pr_debug("Setting IFMarker value to %u based on Initial" | |
852 | " Markerless Interval.\n", conn->if_marker); | |
853 | } | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) | |
859 | { | |
860 | struct iscsi_conn *conn; | |
861 | ||
862 | spin_lock_bh(&sess->conn_lock); | |
863 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
864 | if ((conn->cid == cid) && | |
865 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { | |
866 | iscsit_inc_conn_usage_count(conn); | |
867 | spin_unlock_bh(&sess->conn_lock); | |
868 | return conn; | |
869 | } | |
870 | } | |
871 | spin_unlock_bh(&sess->conn_lock); | |
872 | ||
873 | return NULL; | |
874 | } | |
875 | ||
876 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) | |
877 | { | |
878 | struct iscsi_conn *conn; | |
879 | ||
880 | spin_lock_bh(&sess->conn_lock); | |
881 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
882 | if (conn->cid == cid) { | |
883 | iscsit_inc_conn_usage_count(conn); | |
884 | spin_lock(&conn->state_lock); | |
885 | atomic_set(&conn->connection_wait_rcfr, 1); | |
886 | spin_unlock(&conn->state_lock); | |
887 | spin_unlock_bh(&sess->conn_lock); | |
888 | return conn; | |
889 | } | |
890 | } | |
891 | spin_unlock_bh(&sess->conn_lock); | |
892 | ||
893 | return NULL; | |
894 | } | |
895 | ||
896 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) | |
897 | { | |
898 | spin_lock_bh(&conn->conn_usage_lock); | |
899 | if (conn->conn_usage_count != 0) { | |
900 | conn->conn_waiting_on_uc = 1; | |
901 | spin_unlock_bh(&conn->conn_usage_lock); | |
902 | ||
903 | wait_for_completion(&conn->conn_waiting_on_uc_comp); | |
904 | return; | |
905 | } | |
906 | spin_unlock_bh(&conn->conn_usage_lock); | |
907 | } | |
908 | ||
909 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) | |
910 | { | |
911 | spin_lock_bh(&conn->conn_usage_lock); | |
912 | conn->conn_usage_count--; | |
913 | ||
914 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) | |
915 | complete(&conn->conn_waiting_on_uc_comp); | |
916 | ||
917 | spin_unlock_bh(&conn->conn_usage_lock); | |
918 | } | |
919 | ||
920 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) | |
921 | { | |
922 | spin_lock_bh(&conn->conn_usage_lock); | |
923 | conn->conn_usage_count++; | |
924 | spin_unlock_bh(&conn->conn_usage_lock); | |
925 | } | |
926 | ||
927 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) | |
928 | { | |
929 | u8 state; | |
930 | struct iscsi_cmd *cmd; | |
931 | ||
676687c6 | 932 | cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); |
e48354ce NB |
933 | if (!cmd) |
934 | return -1; | |
935 | ||
936 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; | |
937 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : | |
938 | ISTATE_SEND_NOPIN_NO_RESPONSE; | |
66c7db68 | 939 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
940 | spin_lock_bh(&conn->sess->ttt_lock); |
941 | cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : | |
942 | 0xFFFFFFFF; | |
943 | if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) | |
944 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
945 | spin_unlock_bh(&conn->sess->ttt_lock); | |
946 | ||
947 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 948 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
949 | spin_unlock_bh(&conn->cmd_lock); |
950 | ||
951 | if (want_response) | |
952 | iscsit_start_nopin_response_timer(conn); | |
953 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); | |
954 | ||
955 | return 0; | |
956 | } | |
957 | ||
958 | static void iscsit_handle_nopin_response_timeout(unsigned long data) | |
959 | { | |
960 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
961 | ||
962 | iscsit_inc_conn_usage_count(conn); | |
963 | ||
964 | spin_lock_bh(&conn->nopin_timer_lock); | |
965 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { | |
966 | spin_unlock_bh(&conn->nopin_timer_lock); | |
967 | iscsit_dec_conn_usage_count(conn); | |
968 | return; | |
969 | } | |
970 | ||
971 | pr_debug("Did not receive response to NOPIN on CID: %hu on" | |
972 | " SID: %u, failing connection.\n", conn->cid, | |
973 | conn->sess->sid); | |
974 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
975 | spin_unlock_bh(&conn->nopin_timer_lock); | |
976 | ||
977 | { | |
978 | struct iscsi_portal_group *tpg = conn->sess->tpg; | |
979 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
980 | ||
981 | if (tiqn) { | |
982 | spin_lock_bh(&tiqn->sess_err_stats.lock); | |
983 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
8359cf43 | 984 | conn->sess->sess_ops->InitiatorName); |
e48354ce NB |
985 | tiqn->sess_err_stats.last_sess_failure_type = |
986 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
987 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
04f3b31b | 988 | atomic_long_inc(&conn->sess->conn_timeout_errors); |
e48354ce NB |
989 | spin_unlock_bh(&tiqn->sess_err_stats.lock); |
990 | } | |
991 | } | |
992 | ||
993 | iscsit_cause_connection_reinstatement(conn, 0); | |
994 | iscsit_dec_conn_usage_count(conn); | |
995 | } | |
996 | ||
997 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) | |
998 | { | |
999 | struct iscsi_session *sess = conn->sess; | |
1000 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1001 | ||
1002 | spin_lock_bh(&conn->nopin_timer_lock); | |
1003 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
1004 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1005 | return; | |
1006 | } | |
1007 | ||
1008 | mod_timer(&conn->nopin_response_timer, | |
1009 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); | |
1010 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Called with conn->nopin_timer_lock held. | |
1015 | */ | |
1016 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) | |
1017 | { | |
1018 | struct iscsi_session *sess = conn->sess; | |
1019 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1020 | ||
1021 | spin_lock_bh(&conn->nopin_timer_lock); | |
1022 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { | |
1023 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1024 | return; | |
1025 | } | |
1026 | ||
1027 | init_timer(&conn->nopin_response_timer); | |
1028 | conn->nopin_response_timer.expires = | |
1029 | (get_jiffies_64() + na->nopin_response_timeout * HZ); | |
1030 | conn->nopin_response_timer.data = (unsigned long)conn; | |
1031 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; | |
1032 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; | |
1033 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; | |
1034 | add_timer(&conn->nopin_response_timer); | |
1035 | ||
1036 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" | |
1037 | " seconds\n", conn->cid, na->nopin_response_timeout); | |
1038 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1039 | } | |
1040 | ||
1041 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) | |
1042 | { | |
1043 | spin_lock_bh(&conn->nopin_timer_lock); | |
1044 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
1045 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1046 | return; | |
1047 | } | |
1048 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; | |
1049 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1050 | ||
1051 | del_timer_sync(&conn->nopin_response_timer); | |
1052 | ||
1053 | spin_lock_bh(&conn->nopin_timer_lock); | |
1054 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
1055 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1056 | } | |
1057 | ||
1058 | static void iscsit_handle_nopin_timeout(unsigned long data) | |
1059 | { | |
1060 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
1061 | ||
1062 | iscsit_inc_conn_usage_count(conn); | |
1063 | ||
1064 | spin_lock_bh(&conn->nopin_timer_lock); | |
1065 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { | |
1066 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1067 | iscsit_dec_conn_usage_count(conn); | |
1068 | return; | |
1069 | } | |
1070 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1071 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1072 | ||
1073 | iscsit_add_nopin(conn, 1); | |
1074 | iscsit_dec_conn_usage_count(conn); | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * Called with conn->nopin_timer_lock held. | |
1079 | */ | |
1080 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1081 | { | |
1082 | struct iscsi_session *sess = conn->sess; | |
1083 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1084 | /* | |
1085 | * NOPIN timeout is disabled. | |
1086 | */ | |
1087 | if (!na->nopin_timeout) | |
1088 | return; | |
1089 | ||
1090 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) | |
1091 | return; | |
1092 | ||
1093 | init_timer(&conn->nopin_timer); | |
1094 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1095 | conn->nopin_timer.data = (unsigned long)conn; | |
1096 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1097 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1098 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1099 | add_timer(&conn->nopin_timer); | |
1100 | ||
1101 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1102 | " interval\n", conn->cid, na->nopin_timeout); | |
1103 | } | |
1104 | ||
1105 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1106 | { | |
1107 | struct iscsi_session *sess = conn->sess; | |
1108 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1109 | /* | |
1110 | * NOPIN timeout is disabled.. | |
1111 | */ | |
1112 | if (!na->nopin_timeout) | |
1113 | return; | |
1114 | ||
1115 | spin_lock_bh(&conn->nopin_timer_lock); | |
1116 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { | |
1117 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | init_timer(&conn->nopin_timer); | |
1122 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1123 | conn->nopin_timer.data = (unsigned long)conn; | |
1124 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1125 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1126 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1127 | add_timer(&conn->nopin_timer); | |
1128 | ||
1129 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1130 | " interval\n", conn->cid, na->nopin_timeout); | |
1131 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1132 | } | |
1133 | ||
1134 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) | |
1135 | { | |
1136 | spin_lock_bh(&conn->nopin_timer_lock); | |
1137 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { | |
1138 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1139 | return; | |
1140 | } | |
1141 | conn->nopin_timer_flags |= ISCSI_TF_STOP; | |
1142 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1143 | ||
1144 | del_timer_sync(&conn->nopin_timer); | |
1145 | ||
1146 | spin_lock_bh(&conn->nopin_timer_lock); | |
1147 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1148 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1149 | } | |
1150 | ||
1151 | int iscsit_send_tx_data( | |
1152 | struct iscsi_cmd *cmd, | |
1153 | struct iscsi_conn *conn, | |
1154 | int use_misc) | |
1155 | { | |
1156 | int tx_sent, tx_size; | |
1157 | u32 iov_count; | |
1158 | struct kvec *iov; | |
1159 | ||
1160 | send_data: | |
1161 | tx_size = cmd->tx_size; | |
1162 | ||
1163 | if (!use_misc) { | |
1164 | iov = &cmd->iov_data[0]; | |
1165 | iov_count = cmd->iov_data_count; | |
1166 | } else { | |
1167 | iov = &cmd->iov_misc[0]; | |
1168 | iov_count = cmd->iov_misc_count; | |
1169 | } | |
1170 | ||
1171 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); | |
1172 | if (tx_size != tx_sent) { | |
1173 | if (tx_sent == -EAGAIN) { | |
1174 | pr_err("tx_data() returned -EAGAIN\n"); | |
1175 | goto send_data; | |
1176 | } else | |
1177 | return -1; | |
1178 | } | |
1179 | cmd->tx_size = 0; | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | int iscsit_fe_sendpage_sg( | |
1185 | struct iscsi_cmd *cmd, | |
1186 | struct iscsi_conn *conn) | |
1187 | { | |
1188 | struct scatterlist *sg = cmd->first_data_sg; | |
1189 | struct kvec iov; | |
1190 | u32 tx_hdr_size, data_len; | |
1191 | u32 offset = cmd->first_data_sg_off; | |
40b05497 | 1192 | int tx_sent, iov_off; |
e48354ce NB |
1193 | |
1194 | send_hdr: | |
1195 | tx_hdr_size = ISCSI_HDR_LEN; | |
1196 | if (conn->conn_ops->HeaderDigest) | |
1197 | tx_hdr_size += ISCSI_CRC_LEN; | |
1198 | ||
1199 | iov.iov_base = cmd->pdu; | |
1200 | iov.iov_len = tx_hdr_size; | |
1201 | ||
1202 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); | |
1203 | if (tx_hdr_size != tx_sent) { | |
1204 | if (tx_sent == -EAGAIN) { | |
1205 | pr_err("tx_data() returned -EAGAIN\n"); | |
1206 | goto send_hdr; | |
1207 | } | |
1208 | return -1; | |
1209 | } | |
1210 | ||
1211 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; | |
40b05497 NB |
1212 | /* |
1213 | * Set iov_off used by padding and data digest tx_data() calls below | |
1214 | * in order to determine proper offset into cmd->iov_data[] | |
1215 | */ | |
1216 | if (conn->conn_ops->DataDigest) { | |
e48354ce | 1217 | data_len -= ISCSI_CRC_LEN; |
40b05497 NB |
1218 | if (cmd->padding) |
1219 | iov_off = (cmd->iov_data_count - 2); | |
1220 | else | |
1221 | iov_off = (cmd->iov_data_count - 1); | |
1222 | } else { | |
1223 | iov_off = (cmd->iov_data_count - 1); | |
1224 | } | |
e48354ce NB |
1225 | /* |
1226 | * Perform sendpage() for each page in the scatterlist | |
1227 | */ | |
1228 | while (data_len) { | |
1229 | u32 space = (sg->length - offset); | |
1230 | u32 sub_len = min_t(u32, data_len, space); | |
1231 | send_pg: | |
1232 | tx_sent = conn->sock->ops->sendpage(conn->sock, | |
1233 | sg_page(sg), sg->offset + offset, sub_len, 0); | |
1234 | if (tx_sent != sub_len) { | |
1235 | if (tx_sent == -EAGAIN) { | |
1236 | pr_err("tcp_sendpage() returned" | |
1237 | " -EAGAIN\n"); | |
1238 | goto send_pg; | |
1239 | } | |
1240 | ||
1241 | pr_err("tcp_sendpage() failure: %d\n", | |
1242 | tx_sent); | |
1243 | return -1; | |
1244 | } | |
1245 | ||
1246 | data_len -= sub_len; | |
1247 | offset = 0; | |
1248 | sg = sg_next(sg); | |
1249 | } | |
1250 | ||
1251 | send_padding: | |
1252 | if (cmd->padding) { | |
40b05497 | 1253 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
e48354ce NB |
1254 | |
1255 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); | |
1256 | if (cmd->padding != tx_sent) { | |
1257 | if (tx_sent == -EAGAIN) { | |
1258 | pr_err("tx_data() returned -EAGAIN\n"); | |
1259 | goto send_padding; | |
1260 | } | |
1261 | return -1; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | send_datacrc: | |
1266 | if (conn->conn_ops->DataDigest) { | |
40b05497 | 1267 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
e48354ce NB |
1268 | |
1269 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); | |
1270 | if (ISCSI_CRC_LEN != tx_sent) { | |
1271 | if (tx_sent == -EAGAIN) { | |
1272 | pr_err("tx_data() returned -EAGAIN\n"); | |
1273 | goto send_datacrc; | |
1274 | } | |
1275 | return -1; | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU | |
1284 | * back to the Initiator when an expection condition occurs with the | |
1285 | * errors set in status_class and status_detail. | |
1286 | * | |
1287 | * Parameters: iSCSI Connection, Status Class, Status Detail. | |
1288 | * Returns: 0 on success, -1 on error. | |
1289 | */ | |
1290 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) | |
1291 | { | |
e48354ce | 1292 | struct iscsi_login_rsp *hdr; |
baa4d64b | 1293 | struct iscsi_login *login = conn->conn_login; |
e48354ce | 1294 | |
baa4d64b | 1295 | login->login_failed = 1; |
e48354ce NB |
1296 | iscsit_collect_login_stats(conn, status_class, status_detail); |
1297 | ||
baa4d64b | 1298 | hdr = (struct iscsi_login_rsp *)&login->rsp[0]; |
e48354ce NB |
1299 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
1300 | hdr->status_class = status_class; | |
1301 | hdr->status_detail = status_detail; | |
66c7db68 | 1302 | hdr->itt = conn->login_itt; |
e48354ce | 1303 | |
baa4d64b | 1304 | return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); |
e48354ce NB |
1305 | } |
1306 | ||
1307 | void iscsit_print_session_params(struct iscsi_session *sess) | |
1308 | { | |
1309 | struct iscsi_conn *conn; | |
1310 | ||
1311 | pr_debug("-----------------------------[Session Params for" | |
1312 | " SID: %u]-----------------------------\n", sess->sid); | |
1313 | spin_lock_bh(&sess->conn_lock); | |
1314 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
1315 | iscsi_dump_conn_ops(conn->conn_ops); | |
1316 | spin_unlock_bh(&sess->conn_lock); | |
1317 | ||
1318 | iscsi_dump_sess_ops(sess->sess_ops); | |
1319 | } | |
1320 | ||
1321 | static int iscsit_do_rx_data( | |
1322 | struct iscsi_conn *conn, | |
1323 | struct iscsi_data_count *count) | |
1324 | { | |
1325 | int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; | |
2ff017f5 | 1326 | struct kvec *iov_p; |
e48354ce NB |
1327 | struct msghdr msg; |
1328 | ||
1329 | if (!conn || !conn->sock || !conn->conn_ops) | |
1330 | return -1; | |
1331 | ||
1332 | memset(&msg, 0, sizeof(struct msghdr)); | |
1333 | ||
2ff017f5 NB |
1334 | iov_p = count->iov; |
1335 | iov_len = count->iov_count; | |
e48354ce NB |
1336 | |
1337 | while (total_rx < data) { | |
1338 | rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, | |
1339 | (data - total_rx), MSG_WAITALL); | |
1340 | if (rx_loop <= 0) { | |
1341 | pr_debug("rx_loop: %d total_rx: %d\n", | |
1342 | rx_loop, total_rx); | |
1343 | return rx_loop; | |
1344 | } | |
1345 | total_rx += rx_loop; | |
1346 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", | |
1347 | rx_loop, total_rx, data); | |
1348 | } | |
1349 | ||
e48354ce NB |
1350 | return total_rx; |
1351 | } | |
1352 | ||
1353 | static int iscsit_do_tx_data( | |
1354 | struct iscsi_conn *conn, | |
1355 | struct iscsi_data_count *count) | |
1356 | { | |
1357 | int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; | |
2ff017f5 | 1358 | struct kvec *iov_p; |
e48354ce NB |
1359 | struct msghdr msg; |
1360 | ||
1361 | if (!conn || !conn->sock || !conn->conn_ops) | |
1362 | return -1; | |
1363 | ||
1364 | if (data <= 0) { | |
1365 | pr_err("Data length is: %d\n", data); | |
1366 | return -1; | |
1367 | } | |
1368 | ||
1369 | memset(&msg, 0, sizeof(struct msghdr)); | |
1370 | ||
2ff017f5 NB |
1371 | iov_p = count->iov; |
1372 | iov_len = count->iov_count; | |
e48354ce NB |
1373 | |
1374 | while (total_tx < data) { | |
1375 | tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, | |
1376 | (data - total_tx)); | |
1377 | if (tx_loop <= 0) { | |
1378 | pr_debug("tx_loop: %d total_tx %d\n", | |
1379 | tx_loop, total_tx); | |
1380 | return tx_loop; | |
1381 | } | |
1382 | total_tx += tx_loop; | |
1383 | pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", | |
1384 | tx_loop, total_tx, data); | |
1385 | } | |
1386 | ||
e48354ce NB |
1387 | return total_tx; |
1388 | } | |
1389 | ||
1390 | int rx_data( | |
1391 | struct iscsi_conn *conn, | |
1392 | struct kvec *iov, | |
1393 | int iov_count, | |
1394 | int data) | |
1395 | { | |
1396 | struct iscsi_data_count c; | |
1397 | ||
1398 | if (!conn || !conn->sock || !conn->conn_ops) | |
1399 | return -1; | |
1400 | ||
1401 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1402 | c.iov = iov; | |
1403 | c.iov_count = iov_count; | |
1404 | c.data_length = data; | |
1405 | c.type = ISCSI_RX_DATA; | |
1406 | ||
e48354ce NB |
1407 | return iscsit_do_rx_data(conn, &c); |
1408 | } | |
1409 | ||
1410 | int tx_data( | |
1411 | struct iscsi_conn *conn, | |
1412 | struct kvec *iov, | |
1413 | int iov_count, | |
1414 | int data) | |
1415 | { | |
1416 | struct iscsi_data_count c; | |
1417 | ||
1418 | if (!conn || !conn->sock || !conn->conn_ops) | |
1419 | return -1; | |
1420 | ||
1421 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1422 | c.iov = iov; | |
1423 | c.iov_count = iov_count; | |
1424 | c.data_length = data; | |
1425 | c.type = ISCSI_TX_DATA; | |
1426 | ||
e48354ce NB |
1427 | return iscsit_do_tx_data(conn, &c); |
1428 | } | |
1429 | ||
1430 | void iscsit_collect_login_stats( | |
1431 | struct iscsi_conn *conn, | |
1432 | u8 status_class, | |
1433 | u8 status_detail) | |
1434 | { | |
1435 | struct iscsi_param *intrname = NULL; | |
1436 | struct iscsi_tiqn *tiqn; | |
1437 | struct iscsi_login_stats *ls; | |
1438 | ||
1439 | tiqn = iscsit_snmp_get_tiqn(conn); | |
1440 | if (!tiqn) | |
1441 | return; | |
1442 | ||
1443 | ls = &tiqn->login_stats; | |
1444 | ||
1445 | spin_lock(&ls->lock); | |
1446 | if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && | |
1447 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { | |
1448 | /* We already have the failure info for this login */ | |
1449 | spin_unlock(&ls->lock); | |
1450 | return; | |
1451 | } | |
1452 | ||
1453 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) | |
1454 | ls->accepts++; | |
1455 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { | |
1456 | ls->redirects++; | |
1457 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; | |
1458 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1459 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { | |
1460 | ls->authenticate_fails++; | |
1461 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; | |
1462 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1463 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { | |
1464 | ls->authorize_fails++; | |
1465 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; | |
1466 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1467 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { | |
1468 | ls->negotiate_fails++; | |
1469 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; | |
1470 | } else { | |
1471 | ls->other_fails++; | |
1472 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; | |
1473 | } | |
1474 | ||
1475 | /* Save initiator name, ip address and time, if it is a failed login */ | |
1476 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { | |
1477 | if (conn->param_list) | |
1478 | intrname = iscsi_find_param_from_key(INITIATORNAME, | |
1479 | conn->param_list); | |
1480 | strcpy(ls->last_intr_fail_name, | |
1481 | (intrname ? intrname->value : "Unknown")); | |
1482 | ||
baa4d64b NB |
1483 | ls->last_intr_fail_ip_family = conn->login_family; |
1484 | ||
e48354ce NB |
1485 | snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, |
1486 | "%s", conn->login_ip); | |
1487 | ls->last_fail_time = get_jiffies_64(); | |
1488 | } | |
1489 | ||
1490 | spin_unlock(&ls->lock); | |
1491 | } | |
1492 | ||
1493 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) | |
1494 | { | |
1495 | struct iscsi_portal_group *tpg; | |
1496 | ||
1497 | if (!conn || !conn->sess) | |
1498 | return NULL; | |
1499 | ||
1500 | tpg = conn->sess->tpg; | |
1501 | if (!tpg) | |
1502 | return NULL; | |
1503 | ||
1504 | if (!tpg->tpg_tiqn) | |
1505 | return NULL; | |
1506 | ||
1507 | return tpg->tpg_tiqn; | |
1508 | } |