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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) { |
3687db88 NB |
403 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) |
404 | continue; | |
e48354ce NB |
405 | if (cmd->init_task_tag == init_task_tag) { |
406 | spin_unlock_bh(&conn->cmd_lock); | |
407 | return cmd; | |
408 | } | |
409 | } | |
410 | spin_unlock_bh(&conn->cmd_lock); | |
411 | ||
412 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," | |
413 | " dumping payload\n", init_task_tag, conn->cid); | |
414 | if (length) | |
415 | iscsit_dump_data_payload(conn, length, 1); | |
416 | ||
417 | return NULL; | |
418 | } | |
419 | ||
420 | struct iscsi_cmd *iscsit_find_cmd_from_ttt( | |
421 | struct iscsi_conn *conn, | |
422 | u32 targ_xfer_tag) | |
423 | { | |
424 | struct iscsi_cmd *cmd = NULL; | |
425 | ||
426 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 427 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
428 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
429 | spin_unlock_bh(&conn->cmd_lock); | |
430 | return cmd; | |
431 | } | |
432 | } | |
433 | spin_unlock_bh(&conn->cmd_lock); | |
434 | ||
435 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", | |
436 | targ_xfer_tag, conn->cid); | |
437 | return NULL; | |
438 | } | |
439 | ||
440 | int iscsit_find_cmd_for_recovery( | |
441 | struct iscsi_session *sess, | |
442 | struct iscsi_cmd **cmd_ptr, | |
443 | struct iscsi_conn_recovery **cr_ptr, | |
66c7db68 | 444 | itt_t init_task_tag) |
e48354ce NB |
445 | { |
446 | struct iscsi_cmd *cmd = NULL; | |
447 | struct iscsi_conn_recovery *cr; | |
448 | /* | |
449 | * Scan through the inactive connection recovery list's command list. | |
450 | * If init_task_tag matches the command is still alligent. | |
451 | */ | |
452 | spin_lock(&sess->cr_i_lock); | |
453 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { | |
454 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 455 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
456 | if (cmd->init_task_tag == init_task_tag) { |
457 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
458 | spin_unlock(&sess->cr_i_lock); | |
459 | ||
460 | *cr_ptr = cr; | |
461 | *cmd_ptr = cmd; | |
462 | return -2; | |
463 | } | |
464 | } | |
465 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
466 | } | |
467 | spin_unlock(&sess->cr_i_lock); | |
468 | /* | |
469 | * Scan through the active connection recovery list's command list. | |
470 | * If init_task_tag matches the command is ready to be reassigned. | |
471 | */ | |
472 | spin_lock(&sess->cr_a_lock); | |
473 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { | |
474 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 475 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
476 | if (cmd->init_task_tag == init_task_tag) { |
477 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
478 | spin_unlock(&sess->cr_a_lock); | |
479 | ||
480 | *cr_ptr = cr; | |
481 | *cmd_ptr = cmd; | |
482 | return 0; | |
483 | } | |
484 | } | |
485 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
486 | } | |
487 | spin_unlock(&sess->cr_a_lock); | |
488 | ||
489 | return -1; | |
490 | } | |
491 | ||
492 | void iscsit_add_cmd_to_immediate_queue( | |
493 | struct iscsi_cmd *cmd, | |
494 | struct iscsi_conn *conn, | |
495 | u8 state) | |
496 | { | |
497 | struct iscsi_queue_req *qr; | |
498 | ||
499 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
500 | if (!qr) { | |
501 | pr_err("Unable to allocate memory for" | |
502 | " struct iscsi_queue_req\n"); | |
503 | return; | |
504 | } | |
505 | INIT_LIST_HEAD(&qr->qr_list); | |
506 | qr->cmd = cmd; | |
507 | qr->state = state; | |
508 | ||
509 | spin_lock_bh(&conn->immed_queue_lock); | |
510 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); | |
511 | atomic_inc(&cmd->immed_queue_count); | |
512 | atomic_set(&conn->check_immediate_queue, 1); | |
513 | spin_unlock_bh(&conn->immed_queue_lock); | |
514 | ||
d5627acb | 515 | wake_up(&conn->queues_wq); |
e48354ce NB |
516 | } |
517 | ||
518 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) | |
519 | { | |
520 | struct iscsi_queue_req *qr; | |
521 | ||
522 | spin_lock_bh(&conn->immed_queue_lock); | |
523 | if (list_empty(&conn->immed_queue_list)) { | |
524 | spin_unlock_bh(&conn->immed_queue_lock); | |
525 | return NULL; | |
526 | } | |
1f981de5 RD |
527 | qr = list_first_entry(&conn->immed_queue_list, |
528 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
529 | |
530 | list_del(&qr->qr_list); | |
531 | if (qr->cmd) | |
532 | atomic_dec(&qr->cmd->immed_queue_count); | |
533 | spin_unlock_bh(&conn->immed_queue_lock); | |
534 | ||
535 | return qr; | |
536 | } | |
537 | ||
538 | static void iscsit_remove_cmd_from_immediate_queue( | |
539 | struct iscsi_cmd *cmd, | |
540 | struct iscsi_conn *conn) | |
541 | { | |
542 | struct iscsi_queue_req *qr, *qr_tmp; | |
543 | ||
544 | spin_lock_bh(&conn->immed_queue_lock); | |
545 | if (!atomic_read(&cmd->immed_queue_count)) { | |
546 | spin_unlock_bh(&conn->immed_queue_lock); | |
547 | return; | |
548 | } | |
549 | ||
550 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
551 | if (qr->cmd != cmd) | |
552 | continue; | |
553 | ||
554 | atomic_dec(&qr->cmd->immed_queue_count); | |
555 | list_del(&qr->qr_list); | |
556 | kmem_cache_free(lio_qr_cache, qr); | |
557 | } | |
558 | spin_unlock_bh(&conn->immed_queue_lock); | |
559 | ||
560 | if (atomic_read(&cmd->immed_queue_count)) { | |
561 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", | |
562 | cmd->init_task_tag, | |
563 | atomic_read(&cmd->immed_queue_count)); | |
564 | } | |
565 | } | |
566 | ||
567 | void iscsit_add_cmd_to_response_queue( | |
568 | struct iscsi_cmd *cmd, | |
569 | struct iscsi_conn *conn, | |
570 | u8 state) | |
571 | { | |
572 | struct iscsi_queue_req *qr; | |
573 | ||
574 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
575 | if (!qr) { | |
576 | pr_err("Unable to allocate memory for" | |
577 | " struct iscsi_queue_req\n"); | |
578 | return; | |
579 | } | |
580 | INIT_LIST_HEAD(&qr->qr_list); | |
581 | qr->cmd = cmd; | |
582 | qr->state = state; | |
583 | ||
584 | spin_lock_bh(&conn->response_queue_lock); | |
585 | list_add_tail(&qr->qr_list, &conn->response_queue_list); | |
586 | atomic_inc(&cmd->response_queue_count); | |
587 | spin_unlock_bh(&conn->response_queue_lock); | |
588 | ||
d5627acb | 589 | wake_up(&conn->queues_wq); |
e48354ce NB |
590 | } |
591 | ||
592 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) | |
593 | { | |
594 | struct iscsi_queue_req *qr; | |
595 | ||
596 | spin_lock_bh(&conn->response_queue_lock); | |
597 | if (list_empty(&conn->response_queue_list)) { | |
598 | spin_unlock_bh(&conn->response_queue_lock); | |
599 | return NULL; | |
600 | } | |
601 | ||
1f981de5 RD |
602 | qr = list_first_entry(&conn->response_queue_list, |
603 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
604 | |
605 | list_del(&qr->qr_list); | |
606 | if (qr->cmd) | |
607 | atomic_dec(&qr->cmd->response_queue_count); | |
608 | spin_unlock_bh(&conn->response_queue_lock); | |
609 | ||
610 | return qr; | |
611 | } | |
612 | ||
613 | static void iscsit_remove_cmd_from_response_queue( | |
614 | struct iscsi_cmd *cmd, | |
615 | struct iscsi_conn *conn) | |
616 | { | |
617 | struct iscsi_queue_req *qr, *qr_tmp; | |
618 | ||
619 | spin_lock_bh(&conn->response_queue_lock); | |
620 | if (!atomic_read(&cmd->response_queue_count)) { | |
621 | spin_unlock_bh(&conn->response_queue_lock); | |
622 | return; | |
623 | } | |
624 | ||
625 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
626 | qr_list) { | |
627 | if (qr->cmd != cmd) | |
628 | continue; | |
629 | ||
630 | atomic_dec(&qr->cmd->response_queue_count); | |
631 | list_del(&qr->qr_list); | |
632 | kmem_cache_free(lio_qr_cache, qr); | |
633 | } | |
634 | spin_unlock_bh(&conn->response_queue_lock); | |
635 | ||
636 | if (atomic_read(&cmd->response_queue_count)) { | |
637 | pr_err("ITT: 0x%08x response_queue_count: %d\n", | |
638 | cmd->init_task_tag, | |
639 | atomic_read(&cmd->response_queue_count)); | |
640 | } | |
641 | } | |
642 | ||
d5627acb RD |
643 | bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) |
644 | { | |
645 | bool empty; | |
646 | ||
647 | spin_lock_bh(&conn->immed_queue_lock); | |
648 | empty = list_empty(&conn->immed_queue_list); | |
649 | spin_unlock_bh(&conn->immed_queue_lock); | |
650 | ||
651 | if (!empty) | |
652 | return empty; | |
653 | ||
654 | spin_lock_bh(&conn->response_queue_lock); | |
655 | empty = list_empty(&conn->response_queue_list); | |
656 | spin_unlock_bh(&conn->response_queue_lock); | |
657 | ||
658 | return empty; | |
659 | } | |
660 | ||
e48354ce NB |
661 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) |
662 | { | |
663 | struct iscsi_queue_req *qr, *qr_tmp; | |
664 | ||
665 | spin_lock_bh(&conn->immed_queue_lock); | |
666 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
667 | list_del(&qr->qr_list); | |
668 | if (qr->cmd) | |
669 | atomic_dec(&qr->cmd->immed_queue_count); | |
670 | ||
671 | kmem_cache_free(lio_qr_cache, qr); | |
672 | } | |
673 | spin_unlock_bh(&conn->immed_queue_lock); | |
674 | ||
675 | spin_lock_bh(&conn->response_queue_lock); | |
676 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
677 | qr_list) { | |
678 | list_del(&qr->qr_list); | |
679 | if (qr->cmd) | |
680 | atomic_dec(&qr->cmd->response_queue_count); | |
681 | ||
682 | kmem_cache_free(lio_qr_cache, qr); | |
683 | } | |
684 | spin_unlock_bh(&conn->response_queue_lock); | |
685 | } | |
686 | ||
687 | void iscsit_release_cmd(struct iscsi_cmd *cmd) | |
688 | { | |
988e3a85 NB |
689 | struct iscsi_session *sess; |
690 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
691 | ||
692 | if (cmd->conn) | |
693 | sess = cmd->conn->sess; | |
694 | else | |
695 | sess = cmd->sess; | |
696 | ||
697 | BUG_ON(!sess || !sess->se_sess); | |
698 | ||
e48354ce NB |
699 | kfree(cmd->buf_ptr); |
700 | kfree(cmd->pdu_list); | |
701 | kfree(cmd->seq_list); | |
702 | kfree(cmd->tmr_req); | |
703 | kfree(cmd->iov_data); | |
9864ca9d | 704 | kfree(cmd->text_in_ptr); |
e48354ce | 705 | |
988e3a85 | 706 | percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); |
aafc9d15 | 707 | } |
d703ce2f | 708 | EXPORT_SYMBOL(iscsit_release_cmd); |
aafc9d15 | 709 | |
131e6abc NB |
710 | void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, |
711 | bool check_queues) | |
aafc9d15 NB |
712 | { |
713 | struct iscsi_conn *conn = cmd->conn; | |
714 | ||
715 | if (scsi_cmd) { | |
716 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
717 | iscsit_stop_dataout_timer(cmd); | |
718 | iscsit_free_r2ts_from_list(cmd); | |
719 | } | |
720 | if (cmd->data_direction == DMA_FROM_DEVICE) | |
721 | iscsit_free_all_datain_reqs(cmd); | |
722 | } | |
723 | ||
724 | if (conn && check_queues) { | |
e48354ce NB |
725 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
726 | iscsit_remove_cmd_from_response_queue(cmd, conn); | |
727 | } | |
e48354ce NB |
728 | } |
729 | ||
aafc9d15 | 730 | void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) |
d270190a | 731 | { |
aafc9d15 NB |
732 | struct se_cmd *se_cmd = NULL; |
733 | int rc; | |
d270190a | 734 | /* |
20879696 | 735 | * Determine if a struct se_cmd is associated with |
d270190a NB |
736 | * this struct iscsi_cmd. |
737 | */ | |
738 | switch (cmd->iscsi_opcode) { | |
739 | case ISCSI_OP_SCSI_CMD: | |
aafc9d15 NB |
740 | se_cmd = &cmd->se_cmd; |
741 | __iscsit_free_cmd(cmd, true, shutdown); | |
cdb72665 NB |
742 | /* |
743 | * Fallthrough | |
744 | */ | |
d270190a | 745 | case ISCSI_OP_SCSI_TMFUNC: |
e255a285 | 746 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
747 | if (!rc && shutdown && se_cmd && se_cmd->se_sess) { |
748 | __iscsit_free_cmd(cmd, true, shutdown); | |
749 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
750 | } | |
d270190a | 751 | break; |
c1ce4bd5 NB |
752 | case ISCSI_OP_REJECT: |
753 | /* | |
754 | * Handle special case for REJECT when iscsi_add_reject*() has | |
755 | * overwritten the original iscsi_opcode assignment, and the | |
756 | * associated cmd->se_cmd needs to be released. | |
757 | */ | |
758 | if (cmd->se_cmd.se_tfo != NULL) { | |
aafc9d15 NB |
759 | se_cmd = &cmd->se_cmd; |
760 | __iscsit_free_cmd(cmd, true, shutdown); | |
761 | ||
e255a285 | 762 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
763 | if (!rc && shutdown && se_cmd->se_sess) { |
764 | __iscsit_free_cmd(cmd, true, shutdown); | |
765 | target_put_sess_cmd(se_cmd->se_sess, se_cmd); | |
766 | } | |
c1ce4bd5 NB |
767 | break; |
768 | } | |
769 | /* Fall-through */ | |
d270190a | 770 | default: |
aafc9d15 | 771 | __iscsit_free_cmd(cmd, false, shutdown); |
d703ce2f | 772 | iscsit_release_cmd(cmd); |
d270190a NB |
773 | break; |
774 | } | |
775 | } | |
776 | ||
e48354ce NB |
777 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
778 | { | |
779 | spin_lock_bh(&sess->session_usage_lock); | |
780 | if (sess->session_usage_count != 0) { | |
781 | sess->session_waiting_on_uc = 1; | |
782 | spin_unlock_bh(&sess->session_usage_lock); | |
783 | if (in_interrupt()) | |
784 | return 2; | |
785 | ||
786 | wait_for_completion(&sess->session_waiting_on_uc_comp); | |
787 | return 1; | |
788 | } | |
789 | spin_unlock_bh(&sess->session_usage_lock); | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) | |
795 | { | |
796 | spin_lock_bh(&sess->session_usage_lock); | |
797 | sess->session_usage_count--; | |
798 | ||
799 | if (!sess->session_usage_count && sess->session_waiting_on_uc) | |
800 | complete(&sess->session_waiting_on_uc_comp); | |
801 | ||
802 | spin_unlock_bh(&sess->session_usage_lock); | |
803 | } | |
804 | ||
805 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) | |
806 | { | |
807 | spin_lock_bh(&sess->session_usage_lock); | |
808 | sess->session_usage_count++; | |
809 | spin_unlock_bh(&sess->session_usage_lock); | |
810 | } | |
811 | ||
e48354ce NB |
812 | /* |
813 | * Setup conn->if_marker and conn->of_marker values based upon | |
814 | * the initial marker-less interval. (see iSCSI v19 A.2) | |
815 | */ | |
816 | int iscsit_set_sync_and_steering_values(struct iscsi_conn *conn) | |
817 | { | |
818 | int login_ifmarker_count = 0, login_ofmarker_count = 0, next_marker = 0; | |
819 | /* | |
820 | * IFMarkInt and OFMarkInt are negotiated as 32-bit words. | |
821 | */ | |
822 | u32 IFMarkInt = (conn->conn_ops->IFMarkInt * 4); | |
823 | u32 OFMarkInt = (conn->conn_ops->OFMarkInt * 4); | |
824 | ||
825 | if (conn->conn_ops->OFMarker) { | |
826 | /* | |
827 | * Account for the first Login Command received not | |
828 | * via iscsi_recv_msg(). | |
829 | */ | |
830 | conn->of_marker += ISCSI_HDR_LEN; | |
831 | if (conn->of_marker <= OFMarkInt) { | |
832 | conn->of_marker = (OFMarkInt - conn->of_marker); | |
833 | } else { | |
834 | login_ofmarker_count = (conn->of_marker / OFMarkInt); | |
835 | next_marker = (OFMarkInt * (login_ofmarker_count + 1)) + | |
836 | (login_ofmarker_count * MARKER_SIZE); | |
837 | conn->of_marker = (next_marker - conn->of_marker); | |
838 | } | |
839 | conn->of_marker_offset = 0; | |
840 | pr_debug("Setting OFMarker value to %u based on Initial" | |
841 | " Markerless Interval.\n", conn->of_marker); | |
842 | } | |
843 | ||
844 | if (conn->conn_ops->IFMarker) { | |
845 | if (conn->if_marker <= IFMarkInt) { | |
846 | conn->if_marker = (IFMarkInt - conn->if_marker); | |
847 | } else { | |
848 | login_ifmarker_count = (conn->if_marker / IFMarkInt); | |
849 | next_marker = (IFMarkInt * (login_ifmarker_count + 1)) + | |
850 | (login_ifmarker_count * MARKER_SIZE); | |
851 | conn->if_marker = (next_marker - conn->if_marker); | |
852 | } | |
853 | pr_debug("Setting IFMarker value to %u based on Initial" | |
854 | " Markerless Interval.\n", conn->if_marker); | |
855 | } | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) | |
861 | { | |
862 | struct iscsi_conn *conn; | |
863 | ||
864 | spin_lock_bh(&sess->conn_lock); | |
865 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
866 | if ((conn->cid == cid) && | |
867 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { | |
868 | iscsit_inc_conn_usage_count(conn); | |
869 | spin_unlock_bh(&sess->conn_lock); | |
870 | return conn; | |
871 | } | |
872 | } | |
873 | spin_unlock_bh(&sess->conn_lock); | |
874 | ||
875 | return NULL; | |
876 | } | |
877 | ||
878 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) | |
879 | { | |
880 | struct iscsi_conn *conn; | |
881 | ||
882 | spin_lock_bh(&sess->conn_lock); | |
883 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
884 | if (conn->cid == cid) { | |
885 | iscsit_inc_conn_usage_count(conn); | |
886 | spin_lock(&conn->state_lock); | |
887 | atomic_set(&conn->connection_wait_rcfr, 1); | |
888 | spin_unlock(&conn->state_lock); | |
889 | spin_unlock_bh(&sess->conn_lock); | |
890 | return conn; | |
891 | } | |
892 | } | |
893 | spin_unlock_bh(&sess->conn_lock); | |
894 | ||
895 | return NULL; | |
896 | } | |
897 | ||
898 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) | |
899 | { | |
900 | spin_lock_bh(&conn->conn_usage_lock); | |
901 | if (conn->conn_usage_count != 0) { | |
902 | conn->conn_waiting_on_uc = 1; | |
903 | spin_unlock_bh(&conn->conn_usage_lock); | |
904 | ||
905 | wait_for_completion(&conn->conn_waiting_on_uc_comp); | |
906 | return; | |
907 | } | |
908 | spin_unlock_bh(&conn->conn_usage_lock); | |
909 | } | |
910 | ||
911 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) | |
912 | { | |
913 | spin_lock_bh(&conn->conn_usage_lock); | |
914 | conn->conn_usage_count--; | |
915 | ||
916 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) | |
917 | complete(&conn->conn_waiting_on_uc_comp); | |
918 | ||
919 | spin_unlock_bh(&conn->conn_usage_lock); | |
920 | } | |
921 | ||
922 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) | |
923 | { | |
924 | spin_lock_bh(&conn->conn_usage_lock); | |
925 | conn->conn_usage_count++; | |
926 | spin_unlock_bh(&conn->conn_usage_lock); | |
927 | } | |
928 | ||
929 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) | |
930 | { | |
931 | u8 state; | |
932 | struct iscsi_cmd *cmd; | |
933 | ||
676687c6 | 934 | cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); |
e48354ce NB |
935 | if (!cmd) |
936 | return -1; | |
937 | ||
938 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; | |
939 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : | |
940 | ISTATE_SEND_NOPIN_NO_RESPONSE; | |
66c7db68 | 941 | cmd->init_task_tag = RESERVED_ITT; |
e48354ce NB |
942 | spin_lock_bh(&conn->sess->ttt_lock); |
943 | cmd->targ_xfer_tag = (want_response) ? conn->sess->targ_xfer_tag++ : | |
944 | 0xFFFFFFFF; | |
945 | if (want_response && (cmd->targ_xfer_tag == 0xFFFFFFFF)) | |
946 | cmd->targ_xfer_tag = conn->sess->targ_xfer_tag++; | |
947 | spin_unlock_bh(&conn->sess->ttt_lock); | |
948 | ||
949 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 950 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
951 | spin_unlock_bh(&conn->cmd_lock); |
952 | ||
953 | if (want_response) | |
954 | iscsit_start_nopin_response_timer(conn); | |
955 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); | |
956 | ||
957 | return 0; | |
958 | } | |
959 | ||
960 | static void iscsit_handle_nopin_response_timeout(unsigned long data) | |
961 | { | |
962 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
963 | ||
964 | iscsit_inc_conn_usage_count(conn); | |
965 | ||
966 | spin_lock_bh(&conn->nopin_timer_lock); | |
967 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { | |
968 | spin_unlock_bh(&conn->nopin_timer_lock); | |
969 | iscsit_dec_conn_usage_count(conn); | |
970 | return; | |
971 | } | |
972 | ||
973 | pr_debug("Did not receive response to NOPIN on CID: %hu on" | |
974 | " SID: %u, failing connection.\n", conn->cid, | |
975 | conn->sess->sid); | |
976 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
977 | spin_unlock_bh(&conn->nopin_timer_lock); | |
978 | ||
979 | { | |
980 | struct iscsi_portal_group *tpg = conn->sess->tpg; | |
981 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
982 | ||
983 | if (tiqn) { | |
984 | spin_lock_bh(&tiqn->sess_err_stats.lock); | |
985 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
8359cf43 | 986 | conn->sess->sess_ops->InitiatorName); |
e48354ce NB |
987 | tiqn->sess_err_stats.last_sess_failure_type = |
988 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
989 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
04f3b31b | 990 | atomic_long_inc(&conn->sess->conn_timeout_errors); |
e48354ce NB |
991 | spin_unlock_bh(&tiqn->sess_err_stats.lock); |
992 | } | |
993 | } | |
994 | ||
995 | iscsit_cause_connection_reinstatement(conn, 0); | |
996 | iscsit_dec_conn_usage_count(conn); | |
997 | } | |
998 | ||
999 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) | |
1000 | { | |
1001 | struct iscsi_session *sess = conn->sess; | |
1002 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1003 | ||
1004 | spin_lock_bh(&conn->nopin_timer_lock); | |
1005 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
1006 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1007 | return; | |
1008 | } | |
1009 | ||
1010 | mod_timer(&conn->nopin_response_timer, | |
1011 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); | |
1012 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1013 | } | |
1014 | ||
1015 | /* | |
1016 | * Called with conn->nopin_timer_lock held. | |
1017 | */ | |
1018 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) | |
1019 | { | |
1020 | struct iscsi_session *sess = conn->sess; | |
1021 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1022 | ||
1023 | spin_lock_bh(&conn->nopin_timer_lock); | |
1024 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { | |
1025 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1026 | return; | |
1027 | } | |
1028 | ||
1029 | init_timer(&conn->nopin_response_timer); | |
1030 | conn->nopin_response_timer.expires = | |
1031 | (get_jiffies_64() + na->nopin_response_timeout * HZ); | |
1032 | conn->nopin_response_timer.data = (unsigned long)conn; | |
1033 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; | |
1034 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; | |
1035 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; | |
1036 | add_timer(&conn->nopin_response_timer); | |
1037 | ||
1038 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" | |
1039 | " seconds\n", conn->cid, na->nopin_response_timeout); | |
1040 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1041 | } | |
1042 | ||
1043 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) | |
1044 | { | |
1045 | spin_lock_bh(&conn->nopin_timer_lock); | |
1046 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
1047 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1048 | return; | |
1049 | } | |
1050 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; | |
1051 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1052 | ||
1053 | del_timer_sync(&conn->nopin_response_timer); | |
1054 | ||
1055 | spin_lock_bh(&conn->nopin_timer_lock); | |
1056 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
1057 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1058 | } | |
1059 | ||
1060 | static void iscsit_handle_nopin_timeout(unsigned long data) | |
1061 | { | |
1062 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
1063 | ||
1064 | iscsit_inc_conn_usage_count(conn); | |
1065 | ||
1066 | spin_lock_bh(&conn->nopin_timer_lock); | |
1067 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { | |
1068 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1069 | iscsit_dec_conn_usage_count(conn); | |
1070 | return; | |
1071 | } | |
1072 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1073 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1074 | ||
1075 | iscsit_add_nopin(conn, 1); | |
1076 | iscsit_dec_conn_usage_count(conn); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | * Called with conn->nopin_timer_lock held. | |
1081 | */ | |
1082 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1083 | { | |
1084 | struct iscsi_session *sess = conn->sess; | |
1085 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1086 | /* | |
1087 | * NOPIN timeout is disabled. | |
1088 | */ | |
1089 | if (!na->nopin_timeout) | |
1090 | return; | |
1091 | ||
1092 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) | |
1093 | return; | |
1094 | ||
1095 | init_timer(&conn->nopin_timer); | |
1096 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1097 | conn->nopin_timer.data = (unsigned long)conn; | |
1098 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1099 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1100 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1101 | add_timer(&conn->nopin_timer); | |
1102 | ||
1103 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1104 | " interval\n", conn->cid, na->nopin_timeout); | |
1105 | } | |
1106 | ||
1107 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1108 | { | |
1109 | struct iscsi_session *sess = conn->sess; | |
1110 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1111 | /* | |
1112 | * NOPIN timeout is disabled.. | |
1113 | */ | |
1114 | if (!na->nopin_timeout) | |
1115 | return; | |
1116 | ||
1117 | spin_lock_bh(&conn->nopin_timer_lock); | |
1118 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { | |
1119 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1120 | return; | |
1121 | } | |
1122 | ||
1123 | init_timer(&conn->nopin_timer); | |
1124 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1125 | conn->nopin_timer.data = (unsigned long)conn; | |
1126 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1127 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1128 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1129 | add_timer(&conn->nopin_timer); | |
1130 | ||
1131 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1132 | " interval\n", conn->cid, na->nopin_timeout); | |
1133 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1134 | } | |
1135 | ||
1136 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) | |
1137 | { | |
1138 | spin_lock_bh(&conn->nopin_timer_lock); | |
1139 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { | |
1140 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1141 | return; | |
1142 | } | |
1143 | conn->nopin_timer_flags |= ISCSI_TF_STOP; | |
1144 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1145 | ||
1146 | del_timer_sync(&conn->nopin_timer); | |
1147 | ||
1148 | spin_lock_bh(&conn->nopin_timer_lock); | |
1149 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1150 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1151 | } | |
1152 | ||
1153 | int iscsit_send_tx_data( | |
1154 | struct iscsi_cmd *cmd, | |
1155 | struct iscsi_conn *conn, | |
1156 | int use_misc) | |
1157 | { | |
1158 | int tx_sent, tx_size; | |
1159 | u32 iov_count; | |
1160 | struct kvec *iov; | |
1161 | ||
1162 | send_data: | |
1163 | tx_size = cmd->tx_size; | |
1164 | ||
1165 | if (!use_misc) { | |
1166 | iov = &cmd->iov_data[0]; | |
1167 | iov_count = cmd->iov_data_count; | |
1168 | } else { | |
1169 | iov = &cmd->iov_misc[0]; | |
1170 | iov_count = cmd->iov_misc_count; | |
1171 | } | |
1172 | ||
1173 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); | |
1174 | if (tx_size != tx_sent) { | |
1175 | if (tx_sent == -EAGAIN) { | |
1176 | pr_err("tx_data() returned -EAGAIN\n"); | |
1177 | goto send_data; | |
1178 | } else | |
1179 | return -1; | |
1180 | } | |
1181 | cmd->tx_size = 0; | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | int iscsit_fe_sendpage_sg( | |
1187 | struct iscsi_cmd *cmd, | |
1188 | struct iscsi_conn *conn) | |
1189 | { | |
1190 | struct scatterlist *sg = cmd->first_data_sg; | |
1191 | struct kvec iov; | |
1192 | u32 tx_hdr_size, data_len; | |
1193 | u32 offset = cmd->first_data_sg_off; | |
40b05497 | 1194 | int tx_sent, iov_off; |
e48354ce NB |
1195 | |
1196 | send_hdr: | |
1197 | tx_hdr_size = ISCSI_HDR_LEN; | |
1198 | if (conn->conn_ops->HeaderDigest) | |
1199 | tx_hdr_size += ISCSI_CRC_LEN; | |
1200 | ||
1201 | iov.iov_base = cmd->pdu; | |
1202 | iov.iov_len = tx_hdr_size; | |
1203 | ||
1204 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); | |
1205 | if (tx_hdr_size != tx_sent) { | |
1206 | if (tx_sent == -EAGAIN) { | |
1207 | pr_err("tx_data() returned -EAGAIN\n"); | |
1208 | goto send_hdr; | |
1209 | } | |
1210 | return -1; | |
1211 | } | |
1212 | ||
1213 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; | |
40b05497 NB |
1214 | /* |
1215 | * Set iov_off used by padding and data digest tx_data() calls below | |
1216 | * in order to determine proper offset into cmd->iov_data[] | |
1217 | */ | |
1218 | if (conn->conn_ops->DataDigest) { | |
e48354ce | 1219 | data_len -= ISCSI_CRC_LEN; |
40b05497 NB |
1220 | if (cmd->padding) |
1221 | iov_off = (cmd->iov_data_count - 2); | |
1222 | else | |
1223 | iov_off = (cmd->iov_data_count - 1); | |
1224 | } else { | |
1225 | iov_off = (cmd->iov_data_count - 1); | |
1226 | } | |
e48354ce NB |
1227 | /* |
1228 | * Perform sendpage() for each page in the scatterlist | |
1229 | */ | |
1230 | while (data_len) { | |
1231 | u32 space = (sg->length - offset); | |
1232 | u32 sub_len = min_t(u32, data_len, space); | |
1233 | send_pg: | |
1234 | tx_sent = conn->sock->ops->sendpage(conn->sock, | |
1235 | sg_page(sg), sg->offset + offset, sub_len, 0); | |
1236 | if (tx_sent != sub_len) { | |
1237 | if (tx_sent == -EAGAIN) { | |
1238 | pr_err("tcp_sendpage() returned" | |
1239 | " -EAGAIN\n"); | |
1240 | goto send_pg; | |
1241 | } | |
1242 | ||
1243 | pr_err("tcp_sendpage() failure: %d\n", | |
1244 | tx_sent); | |
1245 | return -1; | |
1246 | } | |
1247 | ||
1248 | data_len -= sub_len; | |
1249 | offset = 0; | |
1250 | sg = sg_next(sg); | |
1251 | } | |
1252 | ||
1253 | send_padding: | |
1254 | if (cmd->padding) { | |
40b05497 | 1255 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
e48354ce NB |
1256 | |
1257 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); | |
1258 | if (cmd->padding != tx_sent) { | |
1259 | if (tx_sent == -EAGAIN) { | |
1260 | pr_err("tx_data() returned -EAGAIN\n"); | |
1261 | goto send_padding; | |
1262 | } | |
1263 | return -1; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | send_datacrc: | |
1268 | if (conn->conn_ops->DataDigest) { | |
40b05497 | 1269 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
e48354ce NB |
1270 | |
1271 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); | |
1272 | if (ISCSI_CRC_LEN != tx_sent) { | |
1273 | if (tx_sent == -EAGAIN) { | |
1274 | pr_err("tx_data() returned -EAGAIN\n"); | |
1275 | goto send_datacrc; | |
1276 | } | |
1277 | return -1; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU | |
1286 | * back to the Initiator when an expection condition occurs with the | |
1287 | * errors set in status_class and status_detail. | |
1288 | * | |
1289 | * Parameters: iSCSI Connection, Status Class, Status Detail. | |
1290 | * Returns: 0 on success, -1 on error. | |
1291 | */ | |
1292 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) | |
1293 | { | |
e48354ce | 1294 | struct iscsi_login_rsp *hdr; |
baa4d64b | 1295 | struct iscsi_login *login = conn->conn_login; |
e48354ce | 1296 | |
baa4d64b | 1297 | login->login_failed = 1; |
e48354ce NB |
1298 | iscsit_collect_login_stats(conn, status_class, status_detail); |
1299 | ||
68349756 NB |
1300 | memset(&login->rsp[0], 0, ISCSI_HDR_LEN); |
1301 | ||
baa4d64b | 1302 | hdr = (struct iscsi_login_rsp *)&login->rsp[0]; |
e48354ce NB |
1303 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
1304 | hdr->status_class = status_class; | |
1305 | hdr->status_detail = status_detail; | |
66c7db68 | 1306 | hdr->itt = conn->login_itt; |
e48354ce | 1307 | |
baa4d64b | 1308 | return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); |
e48354ce NB |
1309 | } |
1310 | ||
1311 | void iscsit_print_session_params(struct iscsi_session *sess) | |
1312 | { | |
1313 | struct iscsi_conn *conn; | |
1314 | ||
1315 | pr_debug("-----------------------------[Session Params for" | |
1316 | " SID: %u]-----------------------------\n", sess->sid); | |
1317 | spin_lock_bh(&sess->conn_lock); | |
1318 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
1319 | iscsi_dump_conn_ops(conn->conn_ops); | |
1320 | spin_unlock_bh(&sess->conn_lock); | |
1321 | ||
1322 | iscsi_dump_sess_ops(sess->sess_ops); | |
1323 | } | |
1324 | ||
1325 | static int iscsit_do_rx_data( | |
1326 | struct iscsi_conn *conn, | |
1327 | struct iscsi_data_count *count) | |
1328 | { | |
1329 | int data = count->data_length, rx_loop = 0, total_rx = 0, iov_len; | |
2ff017f5 | 1330 | struct kvec *iov_p; |
e48354ce NB |
1331 | struct msghdr msg; |
1332 | ||
1333 | if (!conn || !conn->sock || !conn->conn_ops) | |
1334 | return -1; | |
1335 | ||
1336 | memset(&msg, 0, sizeof(struct msghdr)); | |
1337 | ||
2ff017f5 NB |
1338 | iov_p = count->iov; |
1339 | iov_len = count->iov_count; | |
e48354ce NB |
1340 | |
1341 | while (total_rx < data) { | |
1342 | rx_loop = kernel_recvmsg(conn->sock, &msg, iov_p, iov_len, | |
1343 | (data - total_rx), MSG_WAITALL); | |
1344 | if (rx_loop <= 0) { | |
1345 | pr_debug("rx_loop: %d total_rx: %d\n", | |
1346 | rx_loop, total_rx); | |
1347 | return rx_loop; | |
1348 | } | |
1349 | total_rx += rx_loop; | |
1350 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", | |
1351 | rx_loop, total_rx, data); | |
1352 | } | |
1353 | ||
e48354ce NB |
1354 | return total_rx; |
1355 | } | |
1356 | ||
1357 | static int iscsit_do_tx_data( | |
1358 | struct iscsi_conn *conn, | |
1359 | struct iscsi_data_count *count) | |
1360 | { | |
1361 | int data = count->data_length, total_tx = 0, tx_loop = 0, iov_len; | |
2ff017f5 | 1362 | struct kvec *iov_p; |
e48354ce NB |
1363 | struct msghdr msg; |
1364 | ||
1365 | if (!conn || !conn->sock || !conn->conn_ops) | |
1366 | return -1; | |
1367 | ||
1368 | if (data <= 0) { | |
1369 | pr_err("Data length is: %d\n", data); | |
1370 | return -1; | |
1371 | } | |
1372 | ||
1373 | memset(&msg, 0, sizeof(struct msghdr)); | |
1374 | ||
2ff017f5 NB |
1375 | iov_p = count->iov; |
1376 | iov_len = count->iov_count; | |
e48354ce NB |
1377 | |
1378 | while (total_tx < data) { | |
1379 | tx_loop = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, | |
1380 | (data - total_tx)); | |
1381 | if (tx_loop <= 0) { | |
1382 | pr_debug("tx_loop: %d total_tx %d\n", | |
1383 | tx_loop, total_tx); | |
1384 | return tx_loop; | |
1385 | } | |
1386 | total_tx += tx_loop; | |
1387 | pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", | |
1388 | tx_loop, total_tx, data); | |
1389 | } | |
1390 | ||
e48354ce NB |
1391 | return total_tx; |
1392 | } | |
1393 | ||
1394 | int rx_data( | |
1395 | struct iscsi_conn *conn, | |
1396 | struct kvec *iov, | |
1397 | int iov_count, | |
1398 | int data) | |
1399 | { | |
1400 | struct iscsi_data_count c; | |
1401 | ||
1402 | if (!conn || !conn->sock || !conn->conn_ops) | |
1403 | return -1; | |
1404 | ||
1405 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1406 | c.iov = iov; | |
1407 | c.iov_count = iov_count; | |
1408 | c.data_length = data; | |
1409 | c.type = ISCSI_RX_DATA; | |
1410 | ||
e48354ce NB |
1411 | return iscsit_do_rx_data(conn, &c); |
1412 | } | |
1413 | ||
1414 | int tx_data( | |
1415 | struct iscsi_conn *conn, | |
1416 | struct kvec *iov, | |
1417 | int iov_count, | |
1418 | int data) | |
1419 | { | |
1420 | struct iscsi_data_count c; | |
1421 | ||
1422 | if (!conn || !conn->sock || !conn->conn_ops) | |
1423 | return -1; | |
1424 | ||
1425 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1426 | c.iov = iov; | |
1427 | c.iov_count = iov_count; | |
1428 | c.data_length = data; | |
1429 | c.type = ISCSI_TX_DATA; | |
1430 | ||
e48354ce NB |
1431 | return iscsit_do_tx_data(conn, &c); |
1432 | } | |
1433 | ||
1434 | void iscsit_collect_login_stats( | |
1435 | struct iscsi_conn *conn, | |
1436 | u8 status_class, | |
1437 | u8 status_detail) | |
1438 | { | |
1439 | struct iscsi_param *intrname = NULL; | |
1440 | struct iscsi_tiqn *tiqn; | |
1441 | struct iscsi_login_stats *ls; | |
1442 | ||
1443 | tiqn = iscsit_snmp_get_tiqn(conn); | |
1444 | if (!tiqn) | |
1445 | return; | |
1446 | ||
1447 | ls = &tiqn->login_stats; | |
1448 | ||
1449 | spin_lock(&ls->lock); | |
1450 | if (!strcmp(conn->login_ip, ls->last_intr_fail_ip_addr) && | |
1451 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { | |
1452 | /* We already have the failure info for this login */ | |
1453 | spin_unlock(&ls->lock); | |
1454 | return; | |
1455 | } | |
1456 | ||
1457 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) | |
1458 | ls->accepts++; | |
1459 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { | |
1460 | ls->redirects++; | |
1461 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; | |
1462 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1463 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { | |
1464 | ls->authenticate_fails++; | |
1465 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; | |
1466 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1467 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { | |
1468 | ls->authorize_fails++; | |
1469 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; | |
1470 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1471 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { | |
1472 | ls->negotiate_fails++; | |
1473 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; | |
1474 | } else { | |
1475 | ls->other_fails++; | |
1476 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; | |
1477 | } | |
1478 | ||
1479 | /* Save initiator name, ip address and time, if it is a failed login */ | |
1480 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { | |
1481 | if (conn->param_list) | |
1482 | intrname = iscsi_find_param_from_key(INITIATORNAME, | |
1483 | conn->param_list); | |
fdc84d11 JE |
1484 | strlcpy(ls->last_intr_fail_name, |
1485 | (intrname ? intrname->value : "Unknown"), | |
1486 | sizeof(ls->last_intr_fail_name)); | |
e48354ce | 1487 | |
baa4d64b NB |
1488 | ls->last_intr_fail_ip_family = conn->login_family; |
1489 | ||
e48354ce NB |
1490 | snprintf(ls->last_intr_fail_ip_addr, IPV6_ADDRESS_SPACE, |
1491 | "%s", conn->login_ip); | |
1492 | ls->last_fail_time = get_jiffies_64(); | |
1493 | } | |
1494 | ||
1495 | spin_unlock(&ls->lock); | |
1496 | } | |
1497 | ||
1498 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) | |
1499 | { | |
1500 | struct iscsi_portal_group *tpg; | |
1501 | ||
1502 | if (!conn || !conn->sess) | |
1503 | return NULL; | |
1504 | ||
1505 | tpg = conn->sess->tpg; | |
1506 | if (!tpg) | |
1507 | return NULL; | |
1508 | ||
1509 | if (!tpg->tpg_tiqn) | |
1510 | return NULL; | |
1511 | ||
1512 | return tpg->tpg_tiqn; | |
1513 | } |