Commit | Line | Data |
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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> |
baa4d64b | 25 | #include <target/iscsi/iscsi_transport.h> |
e48354ce | 26 | |
67f091f2 | 27 | #include <target/iscsi/iscsi_target_core.h> |
e48354ce NB |
28 | #include "iscsi_target_parameters.h" |
29 | #include "iscsi_target_seq_pdu_list.h" | |
30 | #include "iscsi_target_datain_values.h" | |
31 | #include "iscsi_target_erl0.h" | |
32 | #include "iscsi_target_erl1.h" | |
33 | #include "iscsi_target_erl2.h" | |
34 | #include "iscsi_target_tpg.h" | |
e48354ce NB |
35 | #include "iscsi_target_util.h" |
36 | #include "iscsi_target.h" | |
37 | ||
38 | #define PRINT_BUFF(buff, len) \ | |
39 | { \ | |
40 | int zzz; \ | |
41 | \ | |
42 | pr_debug("%d:\n", __LINE__); \ | |
43 | for (zzz = 0; zzz < len; zzz++) { \ | |
44 | if (zzz % 16 == 0) { \ | |
45 | if (zzz) \ | |
46 | pr_debug("\n"); \ | |
47 | pr_debug("%4i: ", zzz); \ | |
48 | } \ | |
49 | pr_debug("%02x ", (unsigned char) (buff)[zzz]); \ | |
50 | } \ | |
51 | if ((len + 1) % 16) \ | |
52 | pr_debug("\n"); \ | |
53 | } | |
54 | ||
55 | extern struct list_head g_tiqn_list; | |
56 | extern spinlock_t tiqn_lock; | |
57 | ||
58 | /* | |
59 | * Called with cmd->r2t_lock held. | |
60 | */ | |
61 | int iscsit_add_r2t_to_list( | |
62 | struct iscsi_cmd *cmd, | |
63 | u32 offset, | |
64 | u32 xfer_len, | |
65 | int recovery, | |
66 | u32 r2t_sn) | |
67 | { | |
68 | struct iscsi_r2t *r2t; | |
69 | ||
70 | r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); | |
71 | if (!r2t) { | |
72 | pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); | |
73 | return -1; | |
74 | } | |
75 | INIT_LIST_HEAD(&r2t->r2t_list); | |
76 | ||
77 | r2t->recovery_r2t = recovery; | |
78 | r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; | |
79 | r2t->offset = offset; | |
80 | r2t->xfer_len = xfer_len; | |
81 | list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); | |
82 | spin_unlock_bh(&cmd->r2t_lock); | |
83 | ||
84 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); | |
85 | ||
86 | spin_lock_bh(&cmd->r2t_lock); | |
87 | return 0; | |
88 | } | |
89 | ||
90 | struct iscsi_r2t *iscsit_get_r2t_for_eos( | |
91 | struct iscsi_cmd *cmd, | |
92 | u32 offset, | |
93 | u32 length) | |
94 | { | |
95 | struct iscsi_r2t *r2t; | |
96 | ||
97 | spin_lock_bh(&cmd->r2t_lock); | |
98 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
99 | if ((r2t->offset <= offset) && | |
100 | (r2t->offset + r2t->xfer_len) >= (offset + length)) { | |
101 | spin_unlock_bh(&cmd->r2t_lock); | |
102 | return r2t; | |
103 | } | |
104 | } | |
105 | spin_unlock_bh(&cmd->r2t_lock); | |
106 | ||
107 | pr_err("Unable to locate R2T for Offset: %u, Length:" | |
108 | " %u\n", offset, length); | |
109 | return NULL; | |
110 | } | |
111 | ||
112 | struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd) | |
113 | { | |
114 | struct iscsi_r2t *r2t; | |
115 | ||
116 | spin_lock_bh(&cmd->r2t_lock); | |
117 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
118 | if (!r2t->sent_r2t) { | |
119 | spin_unlock_bh(&cmd->r2t_lock); | |
120 | return r2t; | |
121 | } | |
122 | } | |
123 | spin_unlock_bh(&cmd->r2t_lock); | |
124 | ||
125 | pr_err("Unable to locate next R2T to send for ITT:" | |
126 | " 0x%08x.\n", cmd->init_task_tag); | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | /* | |
131 | * Called with cmd->r2t_lock held. | |
132 | */ | |
133 | void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd) | |
134 | { | |
135 | list_del(&r2t->r2t_list); | |
136 | kmem_cache_free(lio_r2t_cache, r2t); | |
137 | } | |
138 | ||
139 | void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd) | |
140 | { | |
141 | struct iscsi_r2t *r2t, *r2t_tmp; | |
142 | ||
143 | spin_lock_bh(&cmd->r2t_lock); | |
144 | list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) | |
145 | iscsit_free_r2t(r2t, cmd); | |
146 | spin_unlock_bh(&cmd->r2t_lock); | |
147 | } | |
148 | ||
149 | /* | |
150 | * May be called from software interrupt (timer) context for allocating | |
151 | * iSCSI NopINs. | |
152 | */ | |
676687c6 | 153 | struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state) |
e48354ce NB |
154 | { |
155 | struct iscsi_cmd *cmd; | |
988e3a85 | 156 | struct se_session *se_sess = conn->sess->se_sess; |
676687c6 | 157 | int size, tag; |
6f6b5d1e KO |
158 | |
159 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, state); | |
160 | if (tag < 0) | |
161 | return NULL; | |
e48354ce | 162 | |
988e3a85 NB |
163 | size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size; |
164 | cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size)); | |
165 | memset(cmd, 0, size); | |
166 | ||
167 | cmd->se_cmd.map_tag = tag; | |
cdb72665 | 168 | cmd->conn = conn; |
2fbb471e | 169 | INIT_LIST_HEAD(&cmd->i_conn_node); |
e48354ce NB |
170 | INIT_LIST_HEAD(&cmd->datain_list); |
171 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); | |
e48354ce NB |
172 | spin_lock_init(&cmd->datain_lock); |
173 | spin_lock_init(&cmd->dataout_timeout_lock); | |
174 | spin_lock_init(&cmd->istate_lock); | |
175 | spin_lock_init(&cmd->error_lock); | |
176 | spin_lock_init(&cmd->r2t_lock); | |
177 | ||
178 | return cmd; | |
179 | } | |
cdb72665 | 180 | EXPORT_SYMBOL(iscsit_allocate_cmd); |
e48354ce | 181 | |
e48354ce NB |
182 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
183 | struct iscsi_cmd *cmd, | |
184 | u32 seq_send_order) | |
185 | { | |
186 | u32 i; | |
187 | ||
188 | for (i = 0; i < cmd->seq_count; i++) | |
189 | if (cmd->seq_list[i].seq_send_order == seq_send_order) | |
190 | return &cmd->seq_list[i]; | |
191 | ||
192 | return NULL; | |
193 | } | |
194 | ||
195 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd) | |
196 | { | |
197 | u32 i; | |
198 | ||
199 | if (!cmd->seq_list) { | |
200 | pr_err("struct iscsi_cmd->seq_list is NULL!\n"); | |
201 | return NULL; | |
202 | } | |
203 | ||
204 | for (i = 0; i < cmd->seq_count; i++) { | |
205 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) | |
206 | continue; | |
207 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { | |
208 | cmd->seq_send_order++; | |
209 | return &cmd->seq_list[i]; | |
210 | } | |
211 | } | |
212 | ||
213 | return NULL; | |
214 | } | |
215 | ||
216 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( | |
217 | struct iscsi_cmd *cmd, | |
218 | u32 r2t_sn) | |
219 | { | |
220 | struct iscsi_r2t *r2t; | |
221 | ||
222 | spin_lock_bh(&cmd->r2t_lock); | |
223 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
224 | if (r2t->r2t_sn == r2t_sn) { | |
225 | spin_unlock_bh(&cmd->r2t_lock); | |
226 | return r2t; | |
227 | } | |
228 | } | |
229 | spin_unlock_bh(&cmd->r2t_lock); | |
230 | ||
231 | return NULL; | |
232 | } | |
233 | ||
234 | static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn) | |
235 | { | |
109e2381 | 236 | u32 max_cmdsn; |
e48354ce NB |
237 | int ret; |
238 | ||
239 | /* | |
240 | * This is the proper method of checking received CmdSN against | |
241 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out | |
242 | * or order CmdSNs due to multiple connection sessions and/or | |
243 | * CRC failures. | |
244 | */ | |
109e2381 RD |
245 | max_cmdsn = atomic_read(&sess->max_cmd_sn); |
246 | if (iscsi_sna_gt(cmdsn, max_cmdsn)) { | |
e48354ce | 247 | pr_err("Received CmdSN: 0x%08x is greater than" |
109e2381 | 248 | " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); |
ea7e32be | 249 | ret = CMDSN_MAXCMDSN_OVERRUN; |
e48354ce NB |
250 | |
251 | } else if (cmdsn == sess->exp_cmd_sn) { | |
252 | sess->exp_cmd_sn++; | |
253 | pr_debug("Received CmdSN matches ExpCmdSN," | |
254 | " incremented ExpCmdSN to: 0x%08x\n", | |
255 | sess->exp_cmd_sn); | |
256 | ret = CMDSN_NORMAL_OPERATION; | |
257 | ||
258 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { | |
259 | pr_debug("Received CmdSN: 0x%08x is greater" | |
260 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", | |
261 | cmdsn, sess->exp_cmd_sn); | |
262 | ret = CMDSN_HIGHER_THAN_EXP; | |
263 | ||
264 | } else { | |
265 | pr_err("Received CmdSN: 0x%08x is less than" | |
266 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, | |
267 | sess->exp_cmd_sn); | |
268 | ret = CMDSN_LOWER_THAN_EXP; | |
269 | } | |
270 | ||
271 | return ret; | |
272 | } | |
273 | ||
274 | /* | |
275 | * Commands may be received out of order if MC/S is in use. | |
276 | * Ensure they are executed in CmdSN order. | |
277 | */ | |
561bf158 NB |
278 | int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, |
279 | unsigned char *buf, __be32 cmdsn) | |
e48354ce | 280 | { |
561bf158 NB |
281 | int ret, cmdsn_ret; |
282 | bool reject = false; | |
283 | u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; | |
e48354ce NB |
284 | |
285 | mutex_lock(&conn->sess->cmdsn_mutex); | |
286 | ||
50e5c87d | 287 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); |
e48354ce NB |
288 | switch (cmdsn_ret) { |
289 | case CMDSN_NORMAL_OPERATION: | |
290 | ret = iscsit_execute_cmd(cmd, 0); | |
291 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) | |
292 | iscsit_execute_ooo_cmdsns(conn->sess); | |
561bf158 NB |
293 | else if (ret < 0) { |
294 | reject = true; | |
295 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
296 | } | |
e48354ce NB |
297 | break; |
298 | case CMDSN_HIGHER_THAN_EXP: | |
50e5c87d | 299 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); |
561bf158 NB |
300 | if (ret < 0) { |
301 | reject = true; | |
302 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
303 | break; | |
304 | } | |
305 | ret = CMDSN_HIGHER_THAN_EXP; | |
e48354ce NB |
306 | break; |
307 | case CMDSN_LOWER_THAN_EXP: | |
ea7e32be NB |
308 | case CMDSN_MAXCMDSN_OVERRUN: |
309 | default: | |
e48354ce NB |
310 | cmd->i_state = ISTATE_REMOVE; |
311 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
ea7e32be NB |
312 | /* |
313 | * Existing callers for iscsit_sequence_cmd() will silently | |
314 | * ignore commands with CMDSN_LOWER_THAN_EXP, so force this | |
315 | * return for CMDSN_MAXCMDSN_OVERRUN as well.. | |
316 | */ | |
317 | ret = CMDSN_LOWER_THAN_EXP; | |
e48354ce NB |
318 | break; |
319 | } | |
320 | mutex_unlock(&conn->sess->cmdsn_mutex); | |
321 | ||
561bf158 NB |
322 | if (reject) |
323 | iscsit_reject_cmd(cmd, reason, buf); | |
324 | ||
e48354ce NB |
325 | return ret; |
326 | } | |
3e1c81a9 | 327 | EXPORT_SYMBOL(iscsit_sequence_cmd); |
e48354ce NB |
328 | |
329 | int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf) | |
330 | { | |
331 | struct iscsi_conn *conn = cmd->conn; | |
332 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
333 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
334 | u32 payload_length = ntoh24(hdr->dlength); | |
335 | ||
336 | if (conn->sess->sess_ops->InitialR2T) { | |
337 | pr_err("Received unexpected unsolicited data" | |
338 | " while InitialR2T=Yes, protocol error.\n"); | |
339 | transport_send_check_condition_and_sense(se_cmd, | |
340 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
341 | return -1; | |
342 | } | |
343 | ||
344 | if ((cmd->first_burst_len + payload_length) > | |
345 | conn->sess->sess_ops->FirstBurstLength) { | |
346 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" | |
347 | " for this Unsolicited DataOut Burst.\n", | |
348 | (cmd->first_burst_len + payload_length), | |
349 | conn->sess->sess_ops->FirstBurstLength); | |
350 | transport_send_check_condition_and_sense(se_cmd, | |
351 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
352 | return -1; | |
353 | } | |
354 | ||
355 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) | |
356 | return 0; | |
357 | ||
ebf1d95c | 358 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
e48354ce NB |
359 | ((cmd->first_burst_len + payload_length) != |
360 | conn->sess->sess_ops->FirstBurstLength)) { | |
361 | pr_err("Unsolicited non-immediate data received %u" | |
362 | " does not equal FirstBurstLength: %u, and does" | |
363 | " not equal ExpXferLen %u.\n", | |
364 | (cmd->first_burst_len + payload_length), | |
ebf1d95c | 365 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
e48354ce NB |
366 | transport_send_check_condition_and_sense(se_cmd, |
367 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
368 | return -1; | |
369 | } | |
370 | return 0; | |
371 | } | |
372 | ||
373 | struct iscsi_cmd *iscsit_find_cmd_from_itt( | |
374 | struct iscsi_conn *conn, | |
66c7db68 | 375 | itt_t init_task_tag) |
e48354ce NB |
376 | { |
377 | struct iscsi_cmd *cmd; | |
378 | ||
379 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 380 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
381 | if (cmd->init_task_tag == init_task_tag) { |
382 | spin_unlock_bh(&conn->cmd_lock); | |
383 | return cmd; | |
384 | } | |
385 | } | |
386 | spin_unlock_bh(&conn->cmd_lock); | |
387 | ||
388 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", | |
389 | init_task_tag, conn->cid); | |
390 | return NULL; | |
391 | } | |
e4f4e801 | 392 | EXPORT_SYMBOL(iscsit_find_cmd_from_itt); |
e48354ce NB |
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 | 516 | } |
d2faaefb | 517 | EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); |
e48354ce NB |
518 | |
519 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn) | |
520 | { | |
521 | struct iscsi_queue_req *qr; | |
522 | ||
523 | spin_lock_bh(&conn->immed_queue_lock); | |
524 | if (list_empty(&conn->immed_queue_list)) { | |
525 | spin_unlock_bh(&conn->immed_queue_lock); | |
526 | return NULL; | |
527 | } | |
1f981de5 RD |
528 | qr = list_first_entry(&conn->immed_queue_list, |
529 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
530 | |
531 | list_del(&qr->qr_list); | |
532 | if (qr->cmd) | |
533 | atomic_dec(&qr->cmd->immed_queue_count); | |
534 | spin_unlock_bh(&conn->immed_queue_lock); | |
535 | ||
536 | return qr; | |
537 | } | |
538 | ||
539 | static void iscsit_remove_cmd_from_immediate_queue( | |
540 | struct iscsi_cmd *cmd, | |
541 | struct iscsi_conn *conn) | |
542 | { | |
543 | struct iscsi_queue_req *qr, *qr_tmp; | |
544 | ||
545 | spin_lock_bh(&conn->immed_queue_lock); | |
546 | if (!atomic_read(&cmd->immed_queue_count)) { | |
547 | spin_unlock_bh(&conn->immed_queue_lock); | |
548 | return; | |
549 | } | |
550 | ||
551 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
552 | if (qr->cmd != cmd) | |
553 | continue; | |
554 | ||
555 | atomic_dec(&qr->cmd->immed_queue_count); | |
556 | list_del(&qr->qr_list); | |
557 | kmem_cache_free(lio_qr_cache, qr); | |
558 | } | |
559 | spin_unlock_bh(&conn->immed_queue_lock); | |
560 | ||
561 | if (atomic_read(&cmd->immed_queue_count)) { | |
562 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", | |
563 | cmd->init_task_tag, | |
564 | atomic_read(&cmd->immed_queue_count)); | |
565 | } | |
566 | } | |
567 | ||
568 | void iscsit_add_cmd_to_response_queue( | |
569 | struct iscsi_cmd *cmd, | |
570 | struct iscsi_conn *conn, | |
571 | u8 state) | |
572 | { | |
573 | struct iscsi_queue_req *qr; | |
574 | ||
575 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
576 | if (!qr) { | |
577 | pr_err("Unable to allocate memory for" | |
578 | " struct iscsi_queue_req\n"); | |
579 | return; | |
580 | } | |
581 | INIT_LIST_HEAD(&qr->qr_list); | |
582 | qr->cmd = cmd; | |
583 | qr->state = state; | |
584 | ||
585 | spin_lock_bh(&conn->response_queue_lock); | |
586 | list_add_tail(&qr->qr_list, &conn->response_queue_list); | |
587 | atomic_inc(&cmd->response_queue_count); | |
588 | spin_unlock_bh(&conn->response_queue_lock); | |
589 | ||
d5627acb | 590 | wake_up(&conn->queues_wq); |
e48354ce NB |
591 | } |
592 | ||
593 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn) | |
594 | { | |
595 | struct iscsi_queue_req *qr; | |
596 | ||
597 | spin_lock_bh(&conn->response_queue_lock); | |
598 | if (list_empty(&conn->response_queue_list)) { | |
599 | spin_unlock_bh(&conn->response_queue_lock); | |
600 | return NULL; | |
601 | } | |
602 | ||
1f981de5 RD |
603 | qr = list_first_entry(&conn->response_queue_list, |
604 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
605 | |
606 | list_del(&qr->qr_list); | |
607 | if (qr->cmd) | |
608 | atomic_dec(&qr->cmd->response_queue_count); | |
609 | spin_unlock_bh(&conn->response_queue_lock); | |
610 | ||
611 | return qr; | |
612 | } | |
613 | ||
614 | static void iscsit_remove_cmd_from_response_queue( | |
615 | struct iscsi_cmd *cmd, | |
616 | struct iscsi_conn *conn) | |
617 | { | |
618 | struct iscsi_queue_req *qr, *qr_tmp; | |
619 | ||
620 | spin_lock_bh(&conn->response_queue_lock); | |
621 | if (!atomic_read(&cmd->response_queue_count)) { | |
622 | spin_unlock_bh(&conn->response_queue_lock); | |
623 | return; | |
624 | } | |
625 | ||
626 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
627 | qr_list) { | |
628 | if (qr->cmd != cmd) | |
629 | continue; | |
630 | ||
631 | atomic_dec(&qr->cmd->response_queue_count); | |
632 | list_del(&qr->qr_list); | |
633 | kmem_cache_free(lio_qr_cache, qr); | |
634 | } | |
635 | spin_unlock_bh(&conn->response_queue_lock); | |
636 | ||
637 | if (atomic_read(&cmd->response_queue_count)) { | |
638 | pr_err("ITT: 0x%08x response_queue_count: %d\n", | |
639 | cmd->init_task_tag, | |
640 | atomic_read(&cmd->response_queue_count)); | |
641 | } | |
642 | } | |
643 | ||
d5627acb RD |
644 | bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn) |
645 | { | |
646 | bool empty; | |
647 | ||
648 | spin_lock_bh(&conn->immed_queue_lock); | |
649 | empty = list_empty(&conn->immed_queue_list); | |
650 | spin_unlock_bh(&conn->immed_queue_lock); | |
651 | ||
652 | if (!empty) | |
653 | return empty; | |
654 | ||
655 | spin_lock_bh(&conn->response_queue_lock); | |
656 | empty = list_empty(&conn->response_queue_list); | |
657 | spin_unlock_bh(&conn->response_queue_lock); | |
658 | ||
659 | return empty; | |
660 | } | |
661 | ||
e48354ce NB |
662 | void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn) |
663 | { | |
664 | struct iscsi_queue_req *qr, *qr_tmp; | |
665 | ||
666 | spin_lock_bh(&conn->immed_queue_lock); | |
667 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
668 | list_del(&qr->qr_list); | |
669 | if (qr->cmd) | |
670 | atomic_dec(&qr->cmd->immed_queue_count); | |
671 | ||
672 | kmem_cache_free(lio_qr_cache, qr); | |
673 | } | |
674 | spin_unlock_bh(&conn->immed_queue_lock); | |
675 | ||
676 | spin_lock_bh(&conn->response_queue_lock); | |
677 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
678 | qr_list) { | |
679 | list_del(&qr->qr_list); | |
680 | if (qr->cmd) | |
681 | atomic_dec(&qr->cmd->response_queue_count); | |
682 | ||
683 | kmem_cache_free(lio_qr_cache, qr); | |
684 | } | |
685 | spin_unlock_bh(&conn->response_queue_lock); | |
686 | } | |
687 | ||
688 | void iscsit_release_cmd(struct iscsi_cmd *cmd) | |
689 | { | |
988e3a85 NB |
690 | struct iscsi_session *sess; |
691 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
692 | ||
693 | if (cmd->conn) | |
694 | sess = cmd->conn->sess; | |
695 | else | |
696 | sess = cmd->sess; | |
697 | ||
698 | BUG_ON(!sess || !sess->se_sess); | |
699 | ||
e48354ce NB |
700 | kfree(cmd->buf_ptr); |
701 | kfree(cmd->pdu_list); | |
702 | kfree(cmd->seq_list); | |
703 | kfree(cmd->tmr_req); | |
704 | kfree(cmd->iov_data); | |
9864ca9d | 705 | kfree(cmd->text_in_ptr); |
e48354ce | 706 | |
988e3a85 | 707 | percpu_ida_free(&sess->se_sess->sess_tag_pool, se_cmd->map_tag); |
aafc9d15 | 708 | } |
d703ce2f | 709 | EXPORT_SYMBOL(iscsit_release_cmd); |
aafc9d15 | 710 | |
131e6abc NB |
711 | void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool scsi_cmd, |
712 | bool check_queues) | |
aafc9d15 NB |
713 | { |
714 | struct iscsi_conn *conn = cmd->conn; | |
715 | ||
716 | if (scsi_cmd) { | |
717 | if (cmd->data_direction == DMA_TO_DEVICE) { | |
718 | iscsit_stop_dataout_timer(cmd); | |
719 | iscsit_free_r2ts_from_list(cmd); | |
720 | } | |
721 | if (cmd->data_direction == DMA_FROM_DEVICE) | |
722 | iscsit_free_all_datain_reqs(cmd); | |
723 | } | |
724 | ||
725 | if (conn && check_queues) { | |
e48354ce NB |
726 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
727 | iscsit_remove_cmd_from_response_queue(cmd, conn); | |
728 | } | |
7ec811a8 VP |
729 | |
730 | if (conn && conn->conn_transport->iscsit_release_cmd) | |
731 | conn->conn_transport->iscsit_release_cmd(conn, cmd); | |
e48354ce NB |
732 | } |
733 | ||
aafc9d15 | 734 | void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown) |
d270190a | 735 | { |
aafc9d15 NB |
736 | struct se_cmd *se_cmd = NULL; |
737 | int rc; | |
d270190a | 738 | /* |
20879696 | 739 | * Determine if a struct se_cmd is associated with |
d270190a NB |
740 | * this struct iscsi_cmd. |
741 | */ | |
742 | switch (cmd->iscsi_opcode) { | |
743 | case ISCSI_OP_SCSI_CMD: | |
aafc9d15 NB |
744 | se_cmd = &cmd->se_cmd; |
745 | __iscsit_free_cmd(cmd, true, shutdown); | |
cdb72665 NB |
746 | /* |
747 | * Fallthrough | |
748 | */ | |
d270190a | 749 | case ISCSI_OP_SCSI_TMFUNC: |
e255a285 | 750 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
751 | if (!rc && shutdown && se_cmd && se_cmd->se_sess) { |
752 | __iscsit_free_cmd(cmd, true, shutdown); | |
afc16604 | 753 | target_put_sess_cmd(se_cmd); |
aafc9d15 | 754 | } |
d270190a | 755 | break; |
c1ce4bd5 NB |
756 | case ISCSI_OP_REJECT: |
757 | /* | |
758 | * Handle special case for REJECT when iscsi_add_reject*() has | |
759 | * overwritten the original iscsi_opcode assignment, and the | |
760 | * associated cmd->se_cmd needs to be released. | |
761 | */ | |
762 | if (cmd->se_cmd.se_tfo != NULL) { | |
aafc9d15 NB |
763 | se_cmd = &cmd->se_cmd; |
764 | __iscsit_free_cmd(cmd, true, shutdown); | |
765 | ||
e255a285 | 766 | rc = transport_generic_free_cmd(&cmd->se_cmd, shutdown); |
aafc9d15 NB |
767 | if (!rc && shutdown && se_cmd->se_sess) { |
768 | __iscsit_free_cmd(cmd, true, shutdown); | |
afc16604 | 769 | target_put_sess_cmd(se_cmd); |
aafc9d15 | 770 | } |
c1ce4bd5 NB |
771 | break; |
772 | } | |
773 | /* Fall-through */ | |
d270190a | 774 | default: |
aafc9d15 | 775 | __iscsit_free_cmd(cmd, false, shutdown); |
d703ce2f | 776 | iscsit_release_cmd(cmd); |
d270190a NB |
777 | break; |
778 | } | |
779 | } | |
d2faaefb | 780 | EXPORT_SYMBOL(iscsit_free_cmd); |
d270190a | 781 | |
e48354ce NB |
782 | int iscsit_check_session_usage_count(struct iscsi_session *sess) |
783 | { | |
784 | spin_lock_bh(&sess->session_usage_lock); | |
785 | if (sess->session_usage_count != 0) { | |
786 | sess->session_waiting_on_uc = 1; | |
787 | spin_unlock_bh(&sess->session_usage_lock); | |
788 | if (in_interrupt()) | |
789 | return 2; | |
790 | ||
791 | wait_for_completion(&sess->session_waiting_on_uc_comp); | |
792 | return 1; | |
793 | } | |
794 | spin_unlock_bh(&sess->session_usage_lock); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | void iscsit_dec_session_usage_count(struct iscsi_session *sess) | |
800 | { | |
801 | spin_lock_bh(&sess->session_usage_lock); | |
802 | sess->session_usage_count--; | |
803 | ||
804 | if (!sess->session_usage_count && sess->session_waiting_on_uc) | |
805 | complete(&sess->session_waiting_on_uc_comp); | |
806 | ||
807 | spin_unlock_bh(&sess->session_usage_lock); | |
808 | } | |
809 | ||
810 | void iscsit_inc_session_usage_count(struct iscsi_session *sess) | |
811 | { | |
812 | spin_lock_bh(&sess->session_usage_lock); | |
813 | sess->session_usage_count++; | |
814 | spin_unlock_bh(&sess->session_usage_lock); | |
815 | } | |
816 | ||
e48354ce NB |
817 | struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid) |
818 | { | |
819 | struct iscsi_conn *conn; | |
820 | ||
821 | spin_lock_bh(&sess->conn_lock); | |
822 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
823 | if ((conn->cid == cid) && | |
824 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { | |
825 | iscsit_inc_conn_usage_count(conn); | |
826 | spin_unlock_bh(&sess->conn_lock); | |
827 | return conn; | |
828 | } | |
829 | } | |
830 | spin_unlock_bh(&sess->conn_lock); | |
831 | ||
832 | return NULL; | |
833 | } | |
834 | ||
835 | struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid) | |
836 | { | |
837 | struct iscsi_conn *conn; | |
838 | ||
839 | spin_lock_bh(&sess->conn_lock); | |
840 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
841 | if (conn->cid == cid) { | |
842 | iscsit_inc_conn_usage_count(conn); | |
843 | spin_lock(&conn->state_lock); | |
844 | atomic_set(&conn->connection_wait_rcfr, 1); | |
845 | spin_unlock(&conn->state_lock); | |
846 | spin_unlock_bh(&sess->conn_lock); | |
847 | return conn; | |
848 | } | |
849 | } | |
850 | spin_unlock_bh(&sess->conn_lock); | |
851 | ||
852 | return NULL; | |
853 | } | |
854 | ||
855 | void iscsit_check_conn_usage_count(struct iscsi_conn *conn) | |
856 | { | |
857 | spin_lock_bh(&conn->conn_usage_lock); | |
858 | if (conn->conn_usage_count != 0) { | |
859 | conn->conn_waiting_on_uc = 1; | |
860 | spin_unlock_bh(&conn->conn_usage_lock); | |
861 | ||
862 | wait_for_completion(&conn->conn_waiting_on_uc_comp); | |
863 | return; | |
864 | } | |
865 | spin_unlock_bh(&conn->conn_usage_lock); | |
866 | } | |
867 | ||
868 | void iscsit_dec_conn_usage_count(struct iscsi_conn *conn) | |
869 | { | |
870 | spin_lock_bh(&conn->conn_usage_lock); | |
871 | conn->conn_usage_count--; | |
872 | ||
873 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) | |
874 | complete(&conn->conn_waiting_on_uc_comp); | |
875 | ||
876 | spin_unlock_bh(&conn->conn_usage_lock); | |
877 | } | |
878 | ||
879 | void iscsit_inc_conn_usage_count(struct iscsi_conn *conn) | |
880 | { | |
881 | spin_lock_bh(&conn->conn_usage_lock); | |
882 | conn->conn_usage_count++; | |
883 | spin_unlock_bh(&conn->conn_usage_lock); | |
884 | } | |
885 | ||
886 | static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response) | |
887 | { | |
888 | u8 state; | |
889 | struct iscsi_cmd *cmd; | |
890 | ||
676687c6 | 891 | cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); |
e48354ce NB |
892 | if (!cmd) |
893 | return -1; | |
894 | ||
895 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; | |
896 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : | |
897 | ISTATE_SEND_NOPIN_NO_RESPONSE; | |
66c7db68 | 898 | cmd->init_task_tag = RESERVED_ITT; |
c1e34b64 SG |
899 | cmd->targ_xfer_tag = (want_response) ? |
900 | session_get_next_ttt(conn->sess) : 0xFFFFFFFF; | |
e48354ce | 901 | spin_lock_bh(&conn->cmd_lock); |
2fbb471e | 902 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
903 | spin_unlock_bh(&conn->cmd_lock); |
904 | ||
905 | if (want_response) | |
906 | iscsit_start_nopin_response_timer(conn); | |
907 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | static void iscsit_handle_nopin_response_timeout(unsigned long data) | |
913 | { | |
914 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
915 | ||
916 | iscsit_inc_conn_usage_count(conn); | |
917 | ||
918 | spin_lock_bh(&conn->nopin_timer_lock); | |
919 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { | |
920 | spin_unlock_bh(&conn->nopin_timer_lock); | |
921 | iscsit_dec_conn_usage_count(conn); | |
922 | return; | |
923 | } | |
924 | ||
925 | pr_debug("Did not receive response to NOPIN on CID: %hu on" | |
926 | " SID: %u, failing connection.\n", conn->cid, | |
927 | conn->sess->sid); | |
928 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
929 | spin_unlock_bh(&conn->nopin_timer_lock); | |
930 | ||
931 | { | |
932 | struct iscsi_portal_group *tpg = conn->sess->tpg; | |
933 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
934 | ||
935 | if (tiqn) { | |
936 | spin_lock_bh(&tiqn->sess_err_stats.lock); | |
937 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
8359cf43 | 938 | conn->sess->sess_ops->InitiatorName); |
e48354ce NB |
939 | tiqn->sess_err_stats.last_sess_failure_type = |
940 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
941 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
04f3b31b | 942 | atomic_long_inc(&conn->sess->conn_timeout_errors); |
e48354ce NB |
943 | spin_unlock_bh(&tiqn->sess_err_stats.lock); |
944 | } | |
945 | } | |
946 | ||
947 | iscsit_cause_connection_reinstatement(conn, 0); | |
948 | iscsit_dec_conn_usage_count(conn); | |
949 | } | |
950 | ||
951 | void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn) | |
952 | { | |
953 | struct iscsi_session *sess = conn->sess; | |
954 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
955 | ||
956 | spin_lock_bh(&conn->nopin_timer_lock); | |
957 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
958 | spin_unlock_bh(&conn->nopin_timer_lock); | |
959 | return; | |
960 | } | |
961 | ||
962 | mod_timer(&conn->nopin_response_timer, | |
963 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); | |
964 | spin_unlock_bh(&conn->nopin_timer_lock); | |
965 | } | |
966 | ||
967 | /* | |
968 | * Called with conn->nopin_timer_lock held. | |
969 | */ | |
970 | void iscsit_start_nopin_response_timer(struct iscsi_conn *conn) | |
971 | { | |
972 | struct iscsi_session *sess = conn->sess; | |
973 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
974 | ||
975 | spin_lock_bh(&conn->nopin_timer_lock); | |
976 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { | |
977 | spin_unlock_bh(&conn->nopin_timer_lock); | |
978 | return; | |
979 | } | |
980 | ||
981 | init_timer(&conn->nopin_response_timer); | |
982 | conn->nopin_response_timer.expires = | |
983 | (get_jiffies_64() + na->nopin_response_timeout * HZ); | |
984 | conn->nopin_response_timer.data = (unsigned long)conn; | |
985 | conn->nopin_response_timer.function = iscsit_handle_nopin_response_timeout; | |
986 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; | |
987 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; | |
988 | add_timer(&conn->nopin_response_timer); | |
989 | ||
990 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" | |
991 | " seconds\n", conn->cid, na->nopin_response_timeout); | |
992 | spin_unlock_bh(&conn->nopin_timer_lock); | |
993 | } | |
994 | ||
995 | void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn) | |
996 | { | |
997 | spin_lock_bh(&conn->nopin_timer_lock); | |
998 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
999 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1000 | return; | |
1001 | } | |
1002 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; | |
1003 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1004 | ||
1005 | del_timer_sync(&conn->nopin_response_timer); | |
1006 | ||
1007 | spin_lock_bh(&conn->nopin_timer_lock); | |
1008 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
1009 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1010 | } | |
1011 | ||
1012 | static void iscsit_handle_nopin_timeout(unsigned long data) | |
1013 | { | |
1014 | struct iscsi_conn *conn = (struct iscsi_conn *) data; | |
1015 | ||
1016 | iscsit_inc_conn_usage_count(conn); | |
1017 | ||
1018 | spin_lock_bh(&conn->nopin_timer_lock); | |
1019 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { | |
1020 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1021 | iscsit_dec_conn_usage_count(conn); | |
1022 | return; | |
1023 | } | |
1024 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1025 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1026 | ||
1027 | iscsit_add_nopin(conn, 1); | |
1028 | iscsit_dec_conn_usage_count(conn); | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * Called with conn->nopin_timer_lock held. | |
1033 | */ | |
1034 | void __iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1035 | { | |
1036 | struct iscsi_session *sess = conn->sess; | |
1037 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1038 | /* | |
1039 | * NOPIN timeout is disabled. | |
1040 | */ | |
1041 | if (!na->nopin_timeout) | |
1042 | return; | |
1043 | ||
1044 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) | |
1045 | return; | |
1046 | ||
1047 | init_timer(&conn->nopin_timer); | |
1048 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1049 | conn->nopin_timer.data = (unsigned long)conn; | |
1050 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1051 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1052 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1053 | add_timer(&conn->nopin_timer); | |
1054 | ||
1055 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1056 | " interval\n", conn->cid, na->nopin_timeout); | |
1057 | } | |
1058 | ||
1059 | void iscsit_start_nopin_timer(struct iscsi_conn *conn) | |
1060 | { | |
1061 | struct iscsi_session *sess = conn->sess; | |
1062 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); | |
1063 | /* | |
1064 | * NOPIN timeout is disabled.. | |
1065 | */ | |
1066 | if (!na->nopin_timeout) | |
1067 | return; | |
1068 | ||
1069 | spin_lock_bh(&conn->nopin_timer_lock); | |
1070 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) { | |
1071 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1072 | return; | |
1073 | } | |
1074 | ||
1075 | init_timer(&conn->nopin_timer); | |
1076 | conn->nopin_timer.expires = (get_jiffies_64() + na->nopin_timeout * HZ); | |
1077 | conn->nopin_timer.data = (unsigned long)conn; | |
1078 | conn->nopin_timer.function = iscsit_handle_nopin_timeout; | |
1079 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; | |
1080 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
1081 | add_timer(&conn->nopin_timer); | |
1082 | ||
1083 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1084 | " interval\n", conn->cid, na->nopin_timeout); | |
1085 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1086 | } | |
1087 | ||
1088 | void iscsit_stop_nopin_timer(struct iscsi_conn *conn) | |
1089 | { | |
1090 | spin_lock_bh(&conn->nopin_timer_lock); | |
1091 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { | |
1092 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1093 | return; | |
1094 | } | |
1095 | conn->nopin_timer_flags |= ISCSI_TF_STOP; | |
1096 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1097 | ||
1098 | del_timer_sync(&conn->nopin_timer); | |
1099 | ||
1100 | spin_lock_bh(&conn->nopin_timer_lock); | |
1101 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1102 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1103 | } | |
1104 | ||
1105 | int iscsit_send_tx_data( | |
1106 | struct iscsi_cmd *cmd, | |
1107 | struct iscsi_conn *conn, | |
1108 | int use_misc) | |
1109 | { | |
1110 | int tx_sent, tx_size; | |
1111 | u32 iov_count; | |
1112 | struct kvec *iov; | |
1113 | ||
1114 | send_data: | |
1115 | tx_size = cmd->tx_size; | |
1116 | ||
1117 | if (!use_misc) { | |
1118 | iov = &cmd->iov_data[0]; | |
1119 | iov_count = cmd->iov_data_count; | |
1120 | } else { | |
1121 | iov = &cmd->iov_misc[0]; | |
1122 | iov_count = cmd->iov_misc_count; | |
1123 | } | |
1124 | ||
1125 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); | |
1126 | if (tx_size != tx_sent) { | |
1127 | if (tx_sent == -EAGAIN) { | |
1128 | pr_err("tx_data() returned -EAGAIN\n"); | |
1129 | goto send_data; | |
1130 | } else | |
1131 | return -1; | |
1132 | } | |
1133 | cmd->tx_size = 0; | |
1134 | ||
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | int iscsit_fe_sendpage_sg( | |
1139 | struct iscsi_cmd *cmd, | |
1140 | struct iscsi_conn *conn) | |
1141 | { | |
1142 | struct scatterlist *sg = cmd->first_data_sg; | |
1143 | struct kvec iov; | |
1144 | u32 tx_hdr_size, data_len; | |
1145 | u32 offset = cmd->first_data_sg_off; | |
40b05497 | 1146 | int tx_sent, iov_off; |
e48354ce NB |
1147 | |
1148 | send_hdr: | |
1149 | tx_hdr_size = ISCSI_HDR_LEN; | |
1150 | if (conn->conn_ops->HeaderDigest) | |
1151 | tx_hdr_size += ISCSI_CRC_LEN; | |
1152 | ||
1153 | iov.iov_base = cmd->pdu; | |
1154 | iov.iov_len = tx_hdr_size; | |
1155 | ||
1156 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); | |
1157 | if (tx_hdr_size != tx_sent) { | |
1158 | if (tx_sent == -EAGAIN) { | |
1159 | pr_err("tx_data() returned -EAGAIN\n"); | |
1160 | goto send_hdr; | |
1161 | } | |
1162 | return -1; | |
1163 | } | |
1164 | ||
1165 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; | |
40b05497 NB |
1166 | /* |
1167 | * Set iov_off used by padding and data digest tx_data() calls below | |
1168 | * in order to determine proper offset into cmd->iov_data[] | |
1169 | */ | |
1170 | if (conn->conn_ops->DataDigest) { | |
e48354ce | 1171 | data_len -= ISCSI_CRC_LEN; |
40b05497 NB |
1172 | if (cmd->padding) |
1173 | iov_off = (cmd->iov_data_count - 2); | |
1174 | else | |
1175 | iov_off = (cmd->iov_data_count - 1); | |
1176 | } else { | |
1177 | iov_off = (cmd->iov_data_count - 1); | |
1178 | } | |
e48354ce NB |
1179 | /* |
1180 | * Perform sendpage() for each page in the scatterlist | |
1181 | */ | |
1182 | while (data_len) { | |
1183 | u32 space = (sg->length - offset); | |
1184 | u32 sub_len = min_t(u32, data_len, space); | |
1185 | send_pg: | |
1186 | tx_sent = conn->sock->ops->sendpage(conn->sock, | |
1187 | sg_page(sg), sg->offset + offset, sub_len, 0); | |
1188 | if (tx_sent != sub_len) { | |
1189 | if (tx_sent == -EAGAIN) { | |
1190 | pr_err("tcp_sendpage() returned" | |
1191 | " -EAGAIN\n"); | |
1192 | goto send_pg; | |
1193 | } | |
1194 | ||
1195 | pr_err("tcp_sendpage() failure: %d\n", | |
1196 | tx_sent); | |
1197 | return -1; | |
1198 | } | |
1199 | ||
1200 | data_len -= sub_len; | |
1201 | offset = 0; | |
1202 | sg = sg_next(sg); | |
1203 | } | |
1204 | ||
1205 | send_padding: | |
1206 | if (cmd->padding) { | |
40b05497 | 1207 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
e48354ce NB |
1208 | |
1209 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); | |
1210 | if (cmd->padding != tx_sent) { | |
1211 | if (tx_sent == -EAGAIN) { | |
1212 | pr_err("tx_data() returned -EAGAIN\n"); | |
1213 | goto send_padding; | |
1214 | } | |
1215 | return -1; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | send_datacrc: | |
1220 | if (conn->conn_ops->DataDigest) { | |
40b05497 | 1221 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
e48354ce NB |
1222 | |
1223 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); | |
1224 | if (ISCSI_CRC_LEN != tx_sent) { | |
1225 | if (tx_sent == -EAGAIN) { | |
1226 | pr_err("tx_data() returned -EAGAIN\n"); | |
1227 | goto send_datacrc; | |
1228 | } | |
1229 | return -1; | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU | |
1238 | * back to the Initiator when an expection condition occurs with the | |
1239 | * errors set in status_class and status_detail. | |
1240 | * | |
1241 | * Parameters: iSCSI Connection, Status Class, Status Detail. | |
1242 | * Returns: 0 on success, -1 on error. | |
1243 | */ | |
1244 | int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail) | |
1245 | { | |
e48354ce | 1246 | struct iscsi_login_rsp *hdr; |
baa4d64b | 1247 | struct iscsi_login *login = conn->conn_login; |
e48354ce | 1248 | |
baa4d64b | 1249 | login->login_failed = 1; |
e48354ce NB |
1250 | iscsit_collect_login_stats(conn, status_class, status_detail); |
1251 | ||
68349756 NB |
1252 | memset(&login->rsp[0], 0, ISCSI_HDR_LEN); |
1253 | ||
baa4d64b | 1254 | hdr = (struct iscsi_login_rsp *)&login->rsp[0]; |
e48354ce NB |
1255 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
1256 | hdr->status_class = status_class; | |
1257 | hdr->status_detail = status_detail; | |
66c7db68 | 1258 | hdr->itt = conn->login_itt; |
e48354ce | 1259 | |
baa4d64b | 1260 | return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); |
e48354ce NB |
1261 | } |
1262 | ||
1263 | void iscsit_print_session_params(struct iscsi_session *sess) | |
1264 | { | |
1265 | struct iscsi_conn *conn; | |
1266 | ||
1267 | pr_debug("-----------------------------[Session Params for" | |
1268 | " SID: %u]-----------------------------\n", sess->sid); | |
1269 | spin_lock_bh(&sess->conn_lock); | |
1270 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
1271 | iscsi_dump_conn_ops(conn->conn_ops); | |
1272 | spin_unlock_bh(&sess->conn_lock); | |
1273 | ||
1274 | iscsi_dump_sess_ops(sess->sess_ops); | |
1275 | } | |
1276 | ||
1277 | static int iscsit_do_rx_data( | |
1278 | struct iscsi_conn *conn, | |
1279 | struct iscsi_data_count *count) | |
1280 | { | |
e5a4b0bb | 1281 | int data = count->data_length, rx_loop = 0, total_rx = 0; |
e48354ce NB |
1282 | struct msghdr msg; |
1283 | ||
1284 | if (!conn || !conn->sock || !conn->conn_ops) | |
1285 | return -1; | |
1286 | ||
1287 | memset(&msg, 0, sizeof(struct msghdr)); | |
e5a4b0bb AV |
1288 | iov_iter_kvec(&msg.msg_iter, READ | ITER_KVEC, |
1289 | count->iov, count->iov_count, data); | |
e48354ce | 1290 | |
2da62906 AV |
1291 | while (msg_data_left(&msg)) { |
1292 | rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); | |
e48354ce NB |
1293 | if (rx_loop <= 0) { |
1294 | pr_debug("rx_loop: %d total_rx: %d\n", | |
1295 | rx_loop, total_rx); | |
1296 | return rx_loop; | |
1297 | } | |
1298 | total_rx += rx_loop; | |
1299 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", | |
1300 | rx_loop, total_rx, data); | |
1301 | } | |
1302 | ||
e48354ce NB |
1303 | return total_rx; |
1304 | } | |
1305 | ||
1306 | static int iscsit_do_tx_data( | |
1307 | struct iscsi_conn *conn, | |
1308 | struct iscsi_data_count *count) | |
1309 | { | |
6bf6ca75 | 1310 | int ret, iov_len; |
2ff017f5 | 1311 | struct kvec *iov_p; |
e48354ce NB |
1312 | struct msghdr msg; |
1313 | ||
1314 | if (!conn || !conn->sock || !conn->conn_ops) | |
1315 | return -1; | |
1316 | ||
6bf6ca75 NB |
1317 | if (count->data_length <= 0) { |
1318 | pr_err("Data length is: %d\n", count->data_length); | |
e48354ce NB |
1319 | return -1; |
1320 | } | |
1321 | ||
1322 | memset(&msg, 0, sizeof(struct msghdr)); | |
1323 | ||
2ff017f5 NB |
1324 | iov_p = count->iov; |
1325 | iov_len = count->iov_count; | |
e48354ce | 1326 | |
6bf6ca75 NB |
1327 | ret = kernel_sendmsg(conn->sock, &msg, iov_p, iov_len, |
1328 | count->data_length); | |
1329 | if (ret != count->data_length) { | |
1330 | pr_err("Unexpected ret: %d send data %d\n", | |
1331 | ret, count->data_length); | |
1332 | return -EPIPE; | |
e48354ce | 1333 | } |
6bf6ca75 | 1334 | pr_debug("ret: %d, sent data: %d\n", ret, count->data_length); |
e48354ce | 1335 | |
6bf6ca75 | 1336 | return ret; |
e48354ce NB |
1337 | } |
1338 | ||
1339 | int rx_data( | |
1340 | struct iscsi_conn *conn, | |
1341 | struct kvec *iov, | |
1342 | int iov_count, | |
1343 | int data) | |
1344 | { | |
1345 | struct iscsi_data_count c; | |
1346 | ||
1347 | if (!conn || !conn->sock || !conn->conn_ops) | |
1348 | return -1; | |
1349 | ||
1350 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1351 | c.iov = iov; | |
1352 | c.iov_count = iov_count; | |
1353 | c.data_length = data; | |
1354 | c.type = ISCSI_RX_DATA; | |
1355 | ||
e48354ce NB |
1356 | return iscsit_do_rx_data(conn, &c); |
1357 | } | |
1358 | ||
1359 | int tx_data( | |
1360 | struct iscsi_conn *conn, | |
1361 | struct kvec *iov, | |
1362 | int iov_count, | |
1363 | int data) | |
1364 | { | |
1365 | struct iscsi_data_count c; | |
1366 | ||
1367 | if (!conn || !conn->sock || !conn->conn_ops) | |
1368 | return -1; | |
1369 | ||
1370 | memset(&c, 0, sizeof(struct iscsi_data_count)); | |
1371 | c.iov = iov; | |
1372 | c.iov_count = iov_count; | |
1373 | c.data_length = data; | |
1374 | c.type = ISCSI_TX_DATA; | |
1375 | ||
e48354ce NB |
1376 | return iscsit_do_tx_data(conn, &c); |
1377 | } | |
1378 | ||
dc58f760 AG |
1379 | static bool sockaddr_equal(struct sockaddr_storage *x, struct sockaddr_storage *y) |
1380 | { | |
1381 | switch (x->ss_family) { | |
1382 | case AF_INET: { | |
1383 | struct sockaddr_in *sinx = (struct sockaddr_in *)x; | |
1384 | struct sockaddr_in *siny = (struct sockaddr_in *)y; | |
1385 | if (sinx->sin_addr.s_addr != siny->sin_addr.s_addr) | |
1386 | return false; | |
1387 | if (sinx->sin_port != siny->sin_port) | |
1388 | return false; | |
1389 | break; | |
1390 | } | |
1391 | case AF_INET6: { | |
1392 | struct sockaddr_in6 *sinx = (struct sockaddr_in6 *)x; | |
1393 | struct sockaddr_in6 *siny = (struct sockaddr_in6 *)y; | |
1394 | if (!ipv6_addr_equal(&sinx->sin6_addr, &siny->sin6_addr)) | |
1395 | return false; | |
1396 | if (sinx->sin6_port != siny->sin6_port) | |
1397 | return false; | |
1398 | break; | |
1399 | } | |
1400 | default: | |
1401 | return false; | |
1402 | } | |
1403 | return true; | |
1404 | } | |
1405 | ||
e48354ce NB |
1406 | void iscsit_collect_login_stats( |
1407 | struct iscsi_conn *conn, | |
1408 | u8 status_class, | |
1409 | u8 status_detail) | |
1410 | { | |
1411 | struct iscsi_param *intrname = NULL; | |
1412 | struct iscsi_tiqn *tiqn; | |
1413 | struct iscsi_login_stats *ls; | |
1414 | ||
1415 | tiqn = iscsit_snmp_get_tiqn(conn); | |
1416 | if (!tiqn) | |
1417 | return; | |
1418 | ||
1419 | ls = &tiqn->login_stats; | |
1420 | ||
1421 | spin_lock(&ls->lock); | |
dc58f760 | 1422 | if (sockaddr_equal(&conn->login_sockaddr, &ls->last_intr_fail_sockaddr) && |
e48354ce NB |
1423 | ((get_jiffies_64() - ls->last_fail_time) < 10)) { |
1424 | /* We already have the failure info for this login */ | |
1425 | spin_unlock(&ls->lock); | |
1426 | return; | |
1427 | } | |
1428 | ||
1429 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) | |
1430 | ls->accepts++; | |
1431 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { | |
1432 | ls->redirects++; | |
1433 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; | |
1434 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1435 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { | |
1436 | ls->authenticate_fails++; | |
1437 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; | |
1438 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1439 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { | |
1440 | ls->authorize_fails++; | |
1441 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; | |
1442 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1443 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { | |
1444 | ls->negotiate_fails++; | |
1445 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; | |
1446 | } else { | |
1447 | ls->other_fails++; | |
1448 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; | |
1449 | } | |
1450 | ||
1451 | /* Save initiator name, ip address and time, if it is a failed login */ | |
1452 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { | |
1453 | if (conn->param_list) | |
1454 | intrname = iscsi_find_param_from_key(INITIATORNAME, | |
1455 | conn->param_list); | |
fdc84d11 JE |
1456 | strlcpy(ls->last_intr_fail_name, |
1457 | (intrname ? intrname->value : "Unknown"), | |
1458 | sizeof(ls->last_intr_fail_name)); | |
e48354ce | 1459 | |
baa4d64b NB |
1460 | ls->last_intr_fail_ip_family = conn->login_family; |
1461 | ||
dc58f760 | 1462 | ls->last_intr_fail_sockaddr = conn->login_sockaddr; |
e48354ce NB |
1463 | ls->last_fail_time = get_jiffies_64(); |
1464 | } | |
1465 | ||
1466 | spin_unlock(&ls->lock); | |
1467 | } | |
1468 | ||
1469 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn) | |
1470 | { | |
1471 | struct iscsi_portal_group *tpg; | |
1472 | ||
1473 | if (!conn || !conn->sess) | |
1474 | return NULL; | |
1475 | ||
1476 | tpg = conn->sess->tpg; | |
1477 | if (!tpg) | |
1478 | return NULL; | |
1479 | ||
1480 | if (!tpg->tpg_tiqn) | |
1481 | return NULL; | |
1482 | ||
1483 | return tpg->tpg_tiqn; | |
1484 | } |