Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
e48354ce NB |
2 | /******************************************************************************* |
3 | * This file contains the iSCSI Target specific utility functions. | |
4 | * | |
4c76251e | 5 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
6 | * |
7 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
8 | * | |
e48354ce NB |
9 | ******************************************************************************/ |
10 | ||
11 | #include <linux/list.h> | |
10e9cbb6 | 12 | #include <linux/sched/signal.h> |
8dcf07be | 13 | #include <net/ipv6.h> /* ipv6_addr_equal() */ |
e48354ce NB |
14 | #include <scsi/scsi_tcq.h> |
15 | #include <scsi/iscsi_proto.h> | |
16 | #include <target/target_core_base.h> | |
c4795fb2 | 17 | #include <target/target_core_fabric.h> |
baa4d64b | 18 | #include <target/iscsi/iscsi_transport.h> |
e48354ce | 19 | |
67f091f2 | 20 | #include <target/iscsi/iscsi_target_core.h> |
e48354ce NB |
21 | #include "iscsi_target_parameters.h" |
22 | #include "iscsi_target_seq_pdu_list.h" | |
23 | #include "iscsi_target_datain_values.h" | |
24 | #include "iscsi_target_erl0.h" | |
25 | #include "iscsi_target_erl1.h" | |
26 | #include "iscsi_target_erl2.h" | |
27 | #include "iscsi_target_tpg.h" | |
e48354ce NB |
28 | #include "iscsi_target_util.h" |
29 | #include "iscsi_target.h" | |
30 | ||
e48354ce NB |
31 | extern struct list_head g_tiqn_list; |
32 | extern spinlock_t tiqn_lock; | |
33 | ||
e48354ce | 34 | int iscsit_add_r2t_to_list( |
66cd9d4e | 35 | struct iscsit_cmd *cmd, |
e48354ce NB |
36 | u32 offset, |
37 | u32 xfer_len, | |
38 | int recovery, | |
39 | u32 r2t_sn) | |
40 | { | |
41 | struct iscsi_r2t *r2t; | |
42 | ||
618baaf7 BVA |
43 | lockdep_assert_held(&cmd->r2t_lock); |
44 | ||
96e8e26d BVA |
45 | WARN_ON_ONCE((s32)xfer_len < 0); |
46 | ||
e48354ce NB |
47 | r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC); |
48 | if (!r2t) { | |
49 | pr_err("Unable to allocate memory for struct iscsi_r2t.\n"); | |
50 | return -1; | |
51 | } | |
52 | INIT_LIST_HEAD(&r2t->r2t_list); | |
53 | ||
54 | r2t->recovery_r2t = recovery; | |
55 | r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn; | |
56 | r2t->offset = offset; | |
57 | r2t->xfer_len = xfer_len; | |
58 | list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list); | |
59 | spin_unlock_bh(&cmd->r2t_lock); | |
60 | ||
61 | iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T); | |
62 | ||
63 | spin_lock_bh(&cmd->r2t_lock); | |
64 | return 0; | |
65 | } | |
66 | ||
67 | struct iscsi_r2t *iscsit_get_r2t_for_eos( | |
66cd9d4e | 68 | struct iscsit_cmd *cmd, |
e48354ce NB |
69 | u32 offset, |
70 | u32 length) | |
71 | { | |
72 | struct iscsi_r2t *r2t; | |
73 | ||
74 | spin_lock_bh(&cmd->r2t_lock); | |
75 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
76 | if ((r2t->offset <= offset) && | |
77 | (r2t->offset + r2t->xfer_len) >= (offset + length)) { | |
78 | spin_unlock_bh(&cmd->r2t_lock); | |
79 | return r2t; | |
80 | } | |
81 | } | |
82 | spin_unlock_bh(&cmd->r2t_lock); | |
83 | ||
84 | pr_err("Unable to locate R2T for Offset: %u, Length:" | |
85 | " %u\n", offset, length); | |
86 | return NULL; | |
87 | } | |
88 | ||
66cd9d4e | 89 | struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsit_cmd *cmd) |
e48354ce NB |
90 | { |
91 | struct iscsi_r2t *r2t; | |
92 | ||
93 | spin_lock_bh(&cmd->r2t_lock); | |
94 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
95 | if (!r2t->sent_r2t) { | |
96 | spin_unlock_bh(&cmd->r2t_lock); | |
97 | return r2t; | |
98 | } | |
99 | } | |
100 | spin_unlock_bh(&cmd->r2t_lock); | |
101 | ||
102 | pr_err("Unable to locate next R2T to send for ITT:" | |
103 | " 0x%08x.\n", cmd->init_task_tag); | |
104 | return NULL; | |
105 | } | |
106 | ||
66cd9d4e | 107 | void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsit_cmd *cmd) |
e48354ce | 108 | { |
618baaf7 BVA |
109 | lockdep_assert_held(&cmd->r2t_lock); |
110 | ||
e48354ce NB |
111 | list_del(&r2t->r2t_list); |
112 | kmem_cache_free(lio_r2t_cache, r2t); | |
113 | } | |
114 | ||
66cd9d4e | 115 | void iscsit_free_r2ts_from_list(struct iscsit_cmd *cmd) |
e48354ce NB |
116 | { |
117 | struct iscsi_r2t *r2t, *r2t_tmp; | |
118 | ||
119 | spin_lock_bh(&cmd->r2t_lock); | |
120 | list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list) | |
121 | iscsit_free_r2t(r2t, cmd); | |
122 | spin_unlock_bh(&cmd->r2t_lock); | |
123 | } | |
124 | ||
10e9cbb6 MW |
125 | static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup) |
126 | { | |
127 | int tag = -1; | |
5d2ee712 | 128 | DEFINE_SBQ_WAIT(wait); |
10e9cbb6 | 129 | struct sbq_wait_state *ws; |
5d2ee712 | 130 | struct sbitmap_queue *sbq; |
10e9cbb6 MW |
131 | |
132 | if (state == TASK_RUNNING) | |
133 | return tag; | |
134 | ||
5d2ee712 JA |
135 | sbq = &se_sess->sess_tag_pool; |
136 | ws = &sbq->ws[0]; | |
10e9cbb6 | 137 | for (;;) { |
5d2ee712 | 138 | sbitmap_prepare_to_wait(sbq, ws, &wait, state); |
10e9cbb6 MW |
139 | if (signal_pending_state(state, current)) |
140 | break; | |
5d2ee712 | 141 | tag = sbitmap_queue_get(sbq, cpup); |
10e9cbb6 MW |
142 | if (tag >= 0) |
143 | break; | |
144 | schedule(); | |
145 | } | |
146 | ||
5d2ee712 | 147 | sbitmap_finish_wait(sbq, ws, &wait); |
10e9cbb6 MW |
148 | return tag; |
149 | } | |
150 | ||
e48354ce NB |
151 | /* |
152 | * May be called from software interrupt (timer) context for allocating | |
153 | * iSCSI NopINs. | |
154 | */ | |
be36d683 | 155 | struct iscsit_cmd *iscsit_allocate_cmd(struct iscsit_conn *conn, int state) |
e48354ce | 156 | { |
66cd9d4e | 157 | struct iscsit_cmd *cmd; |
988e3a85 | 158 | struct se_session *se_sess = conn->sess->se_sess; |
10e9cbb6 | 159 | int size, tag, cpu; |
6f6b5d1e | 160 | |
10e9cbb6 MW |
161 | tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu); |
162 | if (tag < 0) | |
163 | tag = iscsit_wait_for_tag(se_sess, state, &cpu); | |
6f6b5d1e KO |
164 | if (tag < 0) |
165 | return NULL; | |
e48354ce | 166 | |
66cd9d4e MG |
167 | size = sizeof(struct iscsit_cmd) + conn->conn_transport->priv_size; |
168 | cmd = (struct iscsit_cmd *)(se_sess->sess_cmd_map + (tag * size)); | |
988e3a85 NB |
169 | memset(cmd, 0, size); |
170 | ||
171 | cmd->se_cmd.map_tag = tag; | |
10e9cbb6 | 172 | cmd->se_cmd.map_cpu = cpu; |
cdb72665 | 173 | cmd->conn = conn; |
4412a671 | 174 | cmd->data_direction = DMA_NONE; |
2fbb471e | 175 | INIT_LIST_HEAD(&cmd->i_conn_node); |
e48354ce NB |
176 | INIT_LIST_HEAD(&cmd->datain_list); |
177 | INIT_LIST_HEAD(&cmd->cmd_r2t_list); | |
e48354ce NB |
178 | spin_lock_init(&cmd->datain_lock); |
179 | spin_lock_init(&cmd->dataout_timeout_lock); | |
180 | spin_lock_init(&cmd->istate_lock); | |
181 | spin_lock_init(&cmd->error_lock); | |
182 | spin_lock_init(&cmd->r2t_lock); | |
f7c9564a | 183 | timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0); |
e48354ce NB |
184 | |
185 | return cmd; | |
186 | } | |
cdb72665 | 187 | EXPORT_SYMBOL(iscsit_allocate_cmd); |
e48354ce | 188 | |
e48354ce | 189 | struct iscsi_seq *iscsit_get_seq_holder_for_datain( |
66cd9d4e | 190 | struct iscsit_cmd *cmd, |
e48354ce NB |
191 | u32 seq_send_order) |
192 | { | |
193 | u32 i; | |
194 | ||
195 | for (i = 0; i < cmd->seq_count; i++) | |
196 | if (cmd->seq_list[i].seq_send_order == seq_send_order) | |
197 | return &cmd->seq_list[i]; | |
198 | ||
199 | return NULL; | |
200 | } | |
201 | ||
66cd9d4e | 202 | struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsit_cmd *cmd) |
e48354ce NB |
203 | { |
204 | u32 i; | |
205 | ||
206 | if (!cmd->seq_list) { | |
66cd9d4e | 207 | pr_err("struct iscsit_cmd->seq_list is NULL!\n"); |
e48354ce NB |
208 | return NULL; |
209 | } | |
210 | ||
211 | for (i = 0; i < cmd->seq_count; i++) { | |
212 | if (cmd->seq_list[i].type != SEQTYPE_NORMAL) | |
213 | continue; | |
214 | if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) { | |
215 | cmd->seq_send_order++; | |
216 | return &cmd->seq_list[i]; | |
217 | } | |
218 | } | |
219 | ||
220 | return NULL; | |
221 | } | |
222 | ||
223 | struct iscsi_r2t *iscsit_get_holder_for_r2tsn( | |
66cd9d4e | 224 | struct iscsit_cmd *cmd, |
e48354ce NB |
225 | u32 r2t_sn) |
226 | { | |
227 | struct iscsi_r2t *r2t; | |
228 | ||
229 | spin_lock_bh(&cmd->r2t_lock); | |
230 | list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) { | |
231 | if (r2t->r2t_sn == r2t_sn) { | |
232 | spin_unlock_bh(&cmd->r2t_lock); | |
233 | return r2t; | |
234 | } | |
235 | } | |
236 | spin_unlock_bh(&cmd->r2t_lock); | |
237 | ||
238 | return NULL; | |
239 | } | |
240 | ||
0873fe44 | 241 | static inline int iscsit_check_received_cmdsn(struct iscsit_session *sess, u32 cmdsn) |
e48354ce | 242 | { |
109e2381 | 243 | u32 max_cmdsn; |
e48354ce NB |
244 | int ret; |
245 | ||
246 | /* | |
247 | * This is the proper method of checking received CmdSN against | |
248 | * ExpCmdSN and MaxCmdSN values, as well as accounting for out | |
249 | * or order CmdSNs due to multiple connection sessions and/or | |
250 | * CRC failures. | |
251 | */ | |
109e2381 RD |
252 | max_cmdsn = atomic_read(&sess->max_cmd_sn); |
253 | if (iscsi_sna_gt(cmdsn, max_cmdsn)) { | |
e48354ce | 254 | pr_err("Received CmdSN: 0x%08x is greater than" |
109e2381 | 255 | " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn); |
ea7e32be | 256 | ret = CMDSN_MAXCMDSN_OVERRUN; |
e48354ce NB |
257 | |
258 | } else if (cmdsn == sess->exp_cmd_sn) { | |
259 | sess->exp_cmd_sn++; | |
260 | pr_debug("Received CmdSN matches ExpCmdSN," | |
261 | " incremented ExpCmdSN to: 0x%08x\n", | |
262 | sess->exp_cmd_sn); | |
263 | ret = CMDSN_NORMAL_OPERATION; | |
264 | ||
265 | } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) { | |
266 | pr_debug("Received CmdSN: 0x%08x is greater" | |
267 | " than ExpCmdSN: 0x%08x, not acknowledging.\n", | |
268 | cmdsn, sess->exp_cmd_sn); | |
269 | ret = CMDSN_HIGHER_THAN_EXP; | |
270 | ||
271 | } else { | |
272 | pr_err("Received CmdSN: 0x%08x is less than" | |
273 | " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn, | |
274 | sess->exp_cmd_sn); | |
275 | ret = CMDSN_LOWER_THAN_EXP; | |
276 | } | |
277 | ||
278 | return ret; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Commands may be received out of order if MC/S is in use. | |
283 | * Ensure they are executed in CmdSN order. | |
284 | */ | |
be36d683 | 285 | int iscsit_sequence_cmd(struct iscsit_conn *conn, struct iscsit_cmd *cmd, |
561bf158 | 286 | unsigned char *buf, __be32 cmdsn) |
e48354ce | 287 | { |
561bf158 NB |
288 | int ret, cmdsn_ret; |
289 | bool reject = false; | |
290 | u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES; | |
e48354ce NB |
291 | |
292 | mutex_lock(&conn->sess->cmdsn_mutex); | |
293 | ||
50e5c87d | 294 | cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn)); |
e48354ce NB |
295 | switch (cmdsn_ret) { |
296 | case CMDSN_NORMAL_OPERATION: | |
297 | ret = iscsit_execute_cmd(cmd, 0); | |
298 | if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list)) | |
299 | iscsit_execute_ooo_cmdsns(conn->sess); | |
561bf158 NB |
300 | else if (ret < 0) { |
301 | reject = true; | |
302 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
303 | } | |
e48354ce NB |
304 | break; |
305 | case CMDSN_HIGHER_THAN_EXP: | |
50e5c87d | 306 | ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn)); |
561bf158 NB |
307 | if (ret < 0) { |
308 | reject = true; | |
309 | ret = CMDSN_ERROR_CANNOT_RECOVER; | |
310 | break; | |
311 | } | |
312 | ret = CMDSN_HIGHER_THAN_EXP; | |
e48354ce NB |
313 | break; |
314 | case CMDSN_LOWER_THAN_EXP: | |
ea7e32be NB |
315 | case CMDSN_MAXCMDSN_OVERRUN: |
316 | default: | |
e48354ce NB |
317 | cmd->i_state = ISTATE_REMOVE; |
318 | iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state); | |
ea7e32be NB |
319 | /* |
320 | * Existing callers for iscsit_sequence_cmd() will silently | |
321 | * ignore commands with CMDSN_LOWER_THAN_EXP, so force this | |
322 | * return for CMDSN_MAXCMDSN_OVERRUN as well.. | |
323 | */ | |
324 | ret = CMDSN_LOWER_THAN_EXP; | |
e48354ce NB |
325 | break; |
326 | } | |
327 | mutex_unlock(&conn->sess->cmdsn_mutex); | |
328 | ||
561bf158 NB |
329 | if (reject) |
330 | iscsit_reject_cmd(cmd, reason, buf); | |
331 | ||
e48354ce NB |
332 | return ret; |
333 | } | |
3e1c81a9 | 334 | EXPORT_SYMBOL(iscsit_sequence_cmd); |
e48354ce | 335 | |
66cd9d4e | 336 | int iscsit_check_unsolicited_dataout(struct iscsit_cmd *cmd, unsigned char *buf) |
e48354ce | 337 | { |
be36d683 | 338 | struct iscsit_conn *conn = cmd->conn; |
e48354ce NB |
339 | struct se_cmd *se_cmd = &cmd->se_cmd; |
340 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
341 | u32 payload_length = ntoh24(hdr->dlength); | |
342 | ||
343 | if (conn->sess->sess_ops->InitialR2T) { | |
344 | pr_err("Received unexpected unsolicited data" | |
345 | " while InitialR2T=Yes, protocol error.\n"); | |
346 | transport_send_check_condition_and_sense(se_cmd, | |
347 | TCM_UNEXPECTED_UNSOLICITED_DATA, 0); | |
348 | return -1; | |
349 | } | |
350 | ||
351 | if ((cmd->first_burst_len + payload_length) > | |
352 | conn->sess->sess_ops->FirstBurstLength) { | |
353 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" | |
354 | " for this Unsolicited DataOut Burst.\n", | |
355 | (cmd->first_burst_len + payload_length), | |
356 | conn->sess->sess_ops->FirstBurstLength); | |
357 | transport_send_check_condition_and_sense(se_cmd, | |
358 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
359 | return -1; | |
360 | } | |
361 | ||
362 | if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) | |
363 | return 0; | |
364 | ||
ebf1d95c | 365 | if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) && |
e48354ce NB |
366 | ((cmd->first_burst_len + payload_length) != |
367 | conn->sess->sess_ops->FirstBurstLength)) { | |
368 | pr_err("Unsolicited non-immediate data received %u" | |
369 | " does not equal FirstBurstLength: %u, and does" | |
370 | " not equal ExpXferLen %u.\n", | |
371 | (cmd->first_burst_len + payload_length), | |
ebf1d95c | 372 | conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length); |
e48354ce NB |
373 | transport_send_check_condition_and_sense(se_cmd, |
374 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
375 | return -1; | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
66cd9d4e | 380 | struct iscsit_cmd *iscsit_find_cmd_from_itt( |
be36d683 | 381 | struct iscsit_conn *conn, |
66c7db68 | 382 | itt_t init_task_tag) |
e48354ce | 383 | { |
66cd9d4e | 384 | struct iscsit_cmd *cmd; |
e48354ce NB |
385 | |
386 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 387 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
388 | if (cmd->init_task_tag == init_task_tag) { |
389 | spin_unlock_bh(&conn->cmd_lock); | |
390 | return cmd; | |
391 | } | |
392 | } | |
393 | spin_unlock_bh(&conn->cmd_lock); | |
394 | ||
395 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu", | |
396 | init_task_tag, conn->cid); | |
397 | return NULL; | |
398 | } | |
e4f4e801 | 399 | EXPORT_SYMBOL(iscsit_find_cmd_from_itt); |
e48354ce | 400 | |
66cd9d4e | 401 | struct iscsit_cmd *iscsit_find_cmd_from_itt_or_dump( |
be36d683 | 402 | struct iscsit_conn *conn, |
66c7db68 | 403 | itt_t init_task_tag, |
e48354ce NB |
404 | u32 length) |
405 | { | |
66cd9d4e | 406 | struct iscsit_cmd *cmd; |
e48354ce NB |
407 | |
408 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 409 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
3687db88 NB |
410 | if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) |
411 | continue; | |
e48354ce NB |
412 | if (cmd->init_task_tag == init_task_tag) { |
413 | spin_unlock_bh(&conn->cmd_lock); | |
414 | return cmd; | |
415 | } | |
416 | } | |
417 | spin_unlock_bh(&conn->cmd_lock); | |
418 | ||
419 | pr_err("Unable to locate ITT: 0x%08x on CID: %hu," | |
420 | " dumping payload\n", init_task_tag, conn->cid); | |
421 | if (length) | |
422 | iscsit_dump_data_payload(conn, length, 1); | |
423 | ||
424 | return NULL; | |
425 | } | |
9a584bf9 | 426 | EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump); |
e48354ce | 427 | |
66cd9d4e | 428 | struct iscsit_cmd *iscsit_find_cmd_from_ttt( |
be36d683 | 429 | struct iscsit_conn *conn, |
e48354ce NB |
430 | u32 targ_xfer_tag) |
431 | { | |
66cd9d4e | 432 | struct iscsit_cmd *cmd = NULL; |
e48354ce NB |
433 | |
434 | spin_lock_bh(&conn->cmd_lock); | |
2fbb471e | 435 | list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) { |
e48354ce NB |
436 | if (cmd->targ_xfer_tag == targ_xfer_tag) { |
437 | spin_unlock_bh(&conn->cmd_lock); | |
438 | return cmd; | |
439 | } | |
440 | } | |
441 | spin_unlock_bh(&conn->cmd_lock); | |
442 | ||
443 | pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n", | |
444 | targ_xfer_tag, conn->cid); | |
445 | return NULL; | |
446 | } | |
447 | ||
448 | int iscsit_find_cmd_for_recovery( | |
0873fe44 | 449 | struct iscsit_session *sess, |
66cd9d4e | 450 | struct iscsit_cmd **cmd_ptr, |
e48354ce | 451 | struct iscsi_conn_recovery **cr_ptr, |
66c7db68 | 452 | itt_t init_task_tag) |
e48354ce | 453 | { |
66cd9d4e | 454 | struct iscsit_cmd *cmd = NULL; |
e48354ce NB |
455 | struct iscsi_conn_recovery *cr; |
456 | /* | |
457 | * Scan through the inactive connection recovery list's command list. | |
458 | * If init_task_tag matches the command is still alligent. | |
459 | */ | |
460 | spin_lock(&sess->cr_i_lock); | |
461 | list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) { | |
462 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 463 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
464 | if (cmd->init_task_tag == init_task_tag) { |
465 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
466 | spin_unlock(&sess->cr_i_lock); | |
467 | ||
468 | *cr_ptr = cr; | |
469 | *cmd_ptr = cmd; | |
470 | return -2; | |
471 | } | |
472 | } | |
473 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
474 | } | |
475 | spin_unlock(&sess->cr_i_lock); | |
476 | /* | |
477 | * Scan through the active connection recovery list's command list. | |
478 | * If init_task_tag matches the command is ready to be reassigned. | |
479 | */ | |
480 | spin_lock(&sess->cr_a_lock); | |
481 | list_for_each_entry(cr, &sess->cr_active_list, cr_list) { | |
482 | spin_lock(&cr->conn_recovery_cmd_lock); | |
2fbb471e | 483 | list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) { |
e48354ce NB |
484 | if (cmd->init_task_tag == init_task_tag) { |
485 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
486 | spin_unlock(&sess->cr_a_lock); | |
487 | ||
488 | *cr_ptr = cr; | |
489 | *cmd_ptr = cmd; | |
490 | return 0; | |
491 | } | |
492 | } | |
493 | spin_unlock(&cr->conn_recovery_cmd_lock); | |
494 | } | |
495 | spin_unlock(&sess->cr_a_lock); | |
496 | ||
497 | return -1; | |
498 | } | |
499 | ||
500 | void iscsit_add_cmd_to_immediate_queue( | |
66cd9d4e | 501 | struct iscsit_cmd *cmd, |
be36d683 | 502 | struct iscsit_conn *conn, |
e48354ce NB |
503 | u8 state) |
504 | { | |
505 | struct iscsi_queue_req *qr; | |
506 | ||
507 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
508 | if (!qr) { | |
509 | pr_err("Unable to allocate memory for" | |
510 | " struct iscsi_queue_req\n"); | |
511 | return; | |
512 | } | |
513 | INIT_LIST_HEAD(&qr->qr_list); | |
514 | qr->cmd = cmd; | |
515 | qr->state = state; | |
516 | ||
517 | spin_lock_bh(&conn->immed_queue_lock); | |
518 | list_add_tail(&qr->qr_list, &conn->immed_queue_list); | |
519 | atomic_inc(&cmd->immed_queue_count); | |
520 | atomic_set(&conn->check_immediate_queue, 1); | |
521 | spin_unlock_bh(&conn->immed_queue_lock); | |
522 | ||
d5627acb | 523 | wake_up(&conn->queues_wq); |
e48354ce | 524 | } |
d2faaefb | 525 | EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue); |
e48354ce | 526 | |
be36d683 | 527 | struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsit_conn *conn) |
e48354ce NB |
528 | { |
529 | struct iscsi_queue_req *qr; | |
530 | ||
531 | spin_lock_bh(&conn->immed_queue_lock); | |
532 | if (list_empty(&conn->immed_queue_list)) { | |
533 | spin_unlock_bh(&conn->immed_queue_lock); | |
534 | return NULL; | |
535 | } | |
1f981de5 RD |
536 | qr = list_first_entry(&conn->immed_queue_list, |
537 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
538 | |
539 | list_del(&qr->qr_list); | |
540 | if (qr->cmd) | |
541 | atomic_dec(&qr->cmd->immed_queue_count); | |
542 | spin_unlock_bh(&conn->immed_queue_lock); | |
543 | ||
544 | return qr; | |
545 | } | |
546 | ||
547 | static void iscsit_remove_cmd_from_immediate_queue( | |
66cd9d4e | 548 | struct iscsit_cmd *cmd, |
be36d683 | 549 | struct iscsit_conn *conn) |
e48354ce NB |
550 | { |
551 | struct iscsi_queue_req *qr, *qr_tmp; | |
552 | ||
553 | spin_lock_bh(&conn->immed_queue_lock); | |
554 | if (!atomic_read(&cmd->immed_queue_count)) { | |
555 | spin_unlock_bh(&conn->immed_queue_lock); | |
556 | return; | |
557 | } | |
558 | ||
559 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
560 | if (qr->cmd != cmd) | |
561 | continue; | |
562 | ||
563 | atomic_dec(&qr->cmd->immed_queue_count); | |
564 | list_del(&qr->qr_list); | |
565 | kmem_cache_free(lio_qr_cache, qr); | |
566 | } | |
567 | spin_unlock_bh(&conn->immed_queue_lock); | |
568 | ||
569 | if (atomic_read(&cmd->immed_queue_count)) { | |
570 | pr_err("ITT: 0x%08x immed_queue_count: %d\n", | |
571 | cmd->init_task_tag, | |
572 | atomic_read(&cmd->immed_queue_count)); | |
573 | } | |
574 | } | |
575 | ||
a4467018 | 576 | int iscsit_add_cmd_to_response_queue( |
66cd9d4e | 577 | struct iscsit_cmd *cmd, |
be36d683 | 578 | struct iscsit_conn *conn, |
e48354ce NB |
579 | u8 state) |
580 | { | |
581 | struct iscsi_queue_req *qr; | |
582 | ||
583 | qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC); | |
584 | if (!qr) { | |
585 | pr_err("Unable to allocate memory for" | |
586 | " struct iscsi_queue_req\n"); | |
a4467018 | 587 | return -ENOMEM; |
e48354ce NB |
588 | } |
589 | INIT_LIST_HEAD(&qr->qr_list); | |
590 | qr->cmd = cmd; | |
591 | qr->state = state; | |
592 | ||
593 | spin_lock_bh(&conn->response_queue_lock); | |
594 | list_add_tail(&qr->qr_list, &conn->response_queue_list); | |
595 | atomic_inc(&cmd->response_queue_count); | |
596 | spin_unlock_bh(&conn->response_queue_lock); | |
597 | ||
d5627acb | 598 | wake_up(&conn->queues_wq); |
a4467018 | 599 | return 0; |
e48354ce NB |
600 | } |
601 | ||
be36d683 | 602 | struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsit_conn *conn) |
e48354ce NB |
603 | { |
604 | struct iscsi_queue_req *qr; | |
605 | ||
606 | spin_lock_bh(&conn->response_queue_lock); | |
607 | if (list_empty(&conn->response_queue_list)) { | |
608 | spin_unlock_bh(&conn->response_queue_lock); | |
609 | return NULL; | |
610 | } | |
611 | ||
1f981de5 RD |
612 | qr = list_first_entry(&conn->response_queue_list, |
613 | struct iscsi_queue_req, qr_list); | |
e48354ce NB |
614 | |
615 | list_del(&qr->qr_list); | |
616 | if (qr->cmd) | |
617 | atomic_dec(&qr->cmd->response_queue_count); | |
618 | spin_unlock_bh(&conn->response_queue_lock); | |
619 | ||
620 | return qr; | |
621 | } | |
622 | ||
623 | static void iscsit_remove_cmd_from_response_queue( | |
66cd9d4e | 624 | struct iscsit_cmd *cmd, |
be36d683 | 625 | struct iscsit_conn *conn) |
e48354ce NB |
626 | { |
627 | struct iscsi_queue_req *qr, *qr_tmp; | |
628 | ||
629 | spin_lock_bh(&conn->response_queue_lock); | |
630 | if (!atomic_read(&cmd->response_queue_count)) { | |
631 | spin_unlock_bh(&conn->response_queue_lock); | |
632 | return; | |
633 | } | |
634 | ||
635 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
636 | qr_list) { | |
637 | if (qr->cmd != cmd) | |
638 | continue; | |
639 | ||
640 | atomic_dec(&qr->cmd->response_queue_count); | |
641 | list_del(&qr->qr_list); | |
642 | kmem_cache_free(lio_qr_cache, qr); | |
643 | } | |
644 | spin_unlock_bh(&conn->response_queue_lock); | |
645 | ||
646 | if (atomic_read(&cmd->response_queue_count)) { | |
647 | pr_err("ITT: 0x%08x response_queue_count: %d\n", | |
648 | cmd->init_task_tag, | |
649 | atomic_read(&cmd->response_queue_count)); | |
650 | } | |
651 | } | |
652 | ||
be36d683 | 653 | bool iscsit_conn_all_queues_empty(struct iscsit_conn *conn) |
d5627acb RD |
654 | { |
655 | bool empty; | |
656 | ||
657 | spin_lock_bh(&conn->immed_queue_lock); | |
658 | empty = list_empty(&conn->immed_queue_list); | |
659 | spin_unlock_bh(&conn->immed_queue_lock); | |
660 | ||
661 | if (!empty) | |
662 | return empty; | |
663 | ||
664 | spin_lock_bh(&conn->response_queue_lock); | |
665 | empty = list_empty(&conn->response_queue_list); | |
666 | spin_unlock_bh(&conn->response_queue_lock); | |
667 | ||
668 | return empty; | |
669 | } | |
670 | ||
be36d683 | 671 | void iscsit_free_queue_reqs_for_conn(struct iscsit_conn *conn) |
e48354ce NB |
672 | { |
673 | struct iscsi_queue_req *qr, *qr_tmp; | |
674 | ||
675 | spin_lock_bh(&conn->immed_queue_lock); | |
676 | list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) { | |
677 | list_del(&qr->qr_list); | |
678 | if (qr->cmd) | |
679 | atomic_dec(&qr->cmd->immed_queue_count); | |
680 | ||
681 | kmem_cache_free(lio_qr_cache, qr); | |
682 | } | |
683 | spin_unlock_bh(&conn->immed_queue_lock); | |
684 | ||
685 | spin_lock_bh(&conn->response_queue_lock); | |
686 | list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list, | |
687 | qr_list) { | |
688 | list_del(&qr->qr_list); | |
689 | if (qr->cmd) | |
690 | atomic_dec(&qr->cmd->response_queue_count); | |
691 | ||
692 | kmem_cache_free(lio_qr_cache, qr); | |
693 | } | |
694 | spin_unlock_bh(&conn->response_queue_lock); | |
695 | } | |
696 | ||
66cd9d4e | 697 | void iscsit_release_cmd(struct iscsit_cmd *cmd) |
e48354ce | 698 | { |
0873fe44 | 699 | struct iscsit_session *sess; |
988e3a85 NB |
700 | struct se_cmd *se_cmd = &cmd->se_cmd; |
701 | ||
6eaf69e4 BVA |
702 | WARN_ON(!list_empty(&cmd->i_conn_node)); |
703 | ||
988e3a85 NB |
704 | if (cmd->conn) |
705 | sess = cmd->conn->sess; | |
706 | else | |
707 | sess = cmd->sess; | |
708 | ||
709 | BUG_ON(!sess || !sess->se_sess); | |
710 | ||
e48354ce NB |
711 | kfree(cmd->buf_ptr); |
712 | kfree(cmd->pdu_list); | |
713 | kfree(cmd->seq_list); | |
714 | kfree(cmd->tmr_req); | |
0ca650c1 | 715 | kfree(cmd->overflow_buf); |
e48354ce | 716 | kfree(cmd->iov_data); |
9864ca9d | 717 | kfree(cmd->text_in_ptr); |
e48354ce | 718 | |
83c2b54b | 719 | target_free_tag(sess->se_sess, se_cmd); |
aafc9d15 | 720 | } |
d703ce2f | 721 | EXPORT_SYMBOL(iscsit_release_cmd); |
aafc9d15 | 722 | |
66cd9d4e | 723 | void __iscsit_free_cmd(struct iscsit_cmd *cmd, bool check_queues) |
aafc9d15 | 724 | { |
be36d683 | 725 | struct iscsit_conn *conn = cmd->conn; |
aafc9d15 | 726 | |
6eaf69e4 BVA |
727 | WARN_ON(!list_empty(&cmd->i_conn_node)); |
728 | ||
4412a671 BVA |
729 | if (cmd->data_direction == DMA_TO_DEVICE) { |
730 | iscsit_stop_dataout_timer(cmd); | |
731 | iscsit_free_r2ts_from_list(cmd); | |
aafc9d15 | 732 | } |
4412a671 BVA |
733 | if (cmd->data_direction == DMA_FROM_DEVICE) |
734 | iscsit_free_all_datain_reqs(cmd); | |
aafc9d15 NB |
735 | |
736 | if (conn && check_queues) { | |
e48354ce NB |
737 | iscsit_remove_cmd_from_immediate_queue(cmd, conn); |
738 | iscsit_remove_cmd_from_response_queue(cmd, conn); | |
739 | } | |
7ec811a8 | 740 | |
1e65cc16 BVA |
741 | if (conn && conn->conn_transport->iscsit_unmap_cmd) |
742 | conn->conn_transport->iscsit_unmap_cmd(conn, cmd); | |
e48354ce NB |
743 | } |
744 | ||
66cd9d4e | 745 | void iscsit_free_cmd(struct iscsit_cmd *cmd, bool shutdown) |
d270190a | 746 | { |
d1c26857 | 747 | struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL; |
aafc9d15 | 748 | int rc; |
4412a671 | 749 | |
b0055aca BVA |
750 | WARN_ON(!list_empty(&cmd->i_conn_node)); |
751 | ||
d1c26857 BVA |
752 | __iscsit_free_cmd(cmd, shutdown); |
753 | if (se_cmd) { | |
efb2ea77 | 754 | rc = transport_generic_free_cmd(se_cmd, shutdown); |
c8a75afb BVA |
755 | if (!rc && shutdown && se_cmd->se_sess) { |
756 | __iscsit_free_cmd(cmd, shutdown); | |
afc16604 | 757 | target_put_sess_cmd(se_cmd); |
c8a75afb | 758 | } |
d1c26857 | 759 | } else { |
d703ce2f | 760 | iscsit_release_cmd(cmd); |
d270190a NB |
761 | } |
762 | } | |
d2faaefb | 763 | EXPORT_SYMBOL(iscsit_free_cmd); |
d270190a | 764 | |
0873fe44 | 765 | bool iscsit_check_session_usage_count(struct iscsit_session *sess, |
f88a10f8 | 766 | bool can_sleep) |
e48354ce NB |
767 | { |
768 | spin_lock_bh(&sess->session_usage_lock); | |
769 | if (sess->session_usage_count != 0) { | |
770 | sess->session_waiting_on_uc = 1; | |
771 | spin_unlock_bh(&sess->session_usage_lock); | |
efc9d730 | 772 | if (!can_sleep) |
f88a10f8 | 773 | return true; |
e48354ce NB |
774 | |
775 | wait_for_completion(&sess->session_waiting_on_uc_comp); | |
f88a10f8 | 776 | return false; |
e48354ce NB |
777 | } |
778 | spin_unlock_bh(&sess->session_usage_lock); | |
779 | ||
f88a10f8 | 780 | return false; |
e48354ce NB |
781 | } |
782 | ||
0873fe44 | 783 | void iscsit_dec_session_usage_count(struct iscsit_session *sess) |
e48354ce NB |
784 | { |
785 | spin_lock_bh(&sess->session_usage_lock); | |
786 | sess->session_usage_count--; | |
787 | ||
788 | if (!sess->session_usage_count && sess->session_waiting_on_uc) | |
789 | complete(&sess->session_waiting_on_uc_comp); | |
790 | ||
791 | spin_unlock_bh(&sess->session_usage_lock); | |
792 | } | |
793 | ||
0873fe44 | 794 | void iscsit_inc_session_usage_count(struct iscsit_session *sess) |
e48354ce NB |
795 | { |
796 | spin_lock_bh(&sess->session_usage_lock); | |
797 | sess->session_usage_count++; | |
798 | spin_unlock_bh(&sess->session_usage_lock); | |
799 | } | |
800 | ||
0873fe44 | 801 | struct iscsit_conn *iscsit_get_conn_from_cid(struct iscsit_session *sess, u16 cid) |
e48354ce | 802 | { |
be36d683 | 803 | struct iscsit_conn *conn; |
e48354ce NB |
804 | |
805 | spin_lock_bh(&sess->conn_lock); | |
806 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
807 | if ((conn->cid == cid) && | |
808 | (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) { | |
809 | iscsit_inc_conn_usage_count(conn); | |
810 | spin_unlock_bh(&sess->conn_lock); | |
811 | return conn; | |
812 | } | |
813 | } | |
814 | spin_unlock_bh(&sess->conn_lock); | |
815 | ||
816 | return NULL; | |
817 | } | |
818 | ||
0873fe44 | 819 | struct iscsit_conn *iscsit_get_conn_from_cid_rcfr(struct iscsit_session *sess, u16 cid) |
e48354ce | 820 | { |
be36d683 | 821 | struct iscsit_conn *conn; |
e48354ce NB |
822 | |
823 | spin_lock_bh(&sess->conn_lock); | |
824 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) { | |
825 | if (conn->cid == cid) { | |
826 | iscsit_inc_conn_usage_count(conn); | |
827 | spin_lock(&conn->state_lock); | |
828 | atomic_set(&conn->connection_wait_rcfr, 1); | |
829 | spin_unlock(&conn->state_lock); | |
830 | spin_unlock_bh(&sess->conn_lock); | |
831 | return conn; | |
832 | } | |
833 | } | |
834 | spin_unlock_bh(&sess->conn_lock); | |
835 | ||
836 | return NULL; | |
837 | } | |
838 | ||
be36d683 | 839 | void iscsit_check_conn_usage_count(struct iscsit_conn *conn) |
e48354ce NB |
840 | { |
841 | spin_lock_bh(&conn->conn_usage_lock); | |
842 | if (conn->conn_usage_count != 0) { | |
843 | conn->conn_waiting_on_uc = 1; | |
844 | spin_unlock_bh(&conn->conn_usage_lock); | |
845 | ||
846 | wait_for_completion(&conn->conn_waiting_on_uc_comp); | |
847 | return; | |
848 | } | |
849 | spin_unlock_bh(&conn->conn_usage_lock); | |
850 | } | |
851 | ||
be36d683 | 852 | void iscsit_dec_conn_usage_count(struct iscsit_conn *conn) |
e48354ce NB |
853 | { |
854 | spin_lock_bh(&conn->conn_usage_lock); | |
855 | conn->conn_usage_count--; | |
856 | ||
857 | if (!conn->conn_usage_count && conn->conn_waiting_on_uc) | |
858 | complete(&conn->conn_waiting_on_uc_comp); | |
859 | ||
860 | spin_unlock_bh(&conn->conn_usage_lock); | |
861 | } | |
862 | ||
be36d683 | 863 | void iscsit_inc_conn_usage_count(struct iscsit_conn *conn) |
e48354ce NB |
864 | { |
865 | spin_lock_bh(&conn->conn_usage_lock); | |
866 | conn->conn_usage_count++; | |
867 | spin_unlock_bh(&conn->conn_usage_lock); | |
868 | } | |
869 | ||
be36d683 | 870 | static int iscsit_add_nopin(struct iscsit_conn *conn, int want_response) |
e48354ce NB |
871 | { |
872 | u8 state; | |
66cd9d4e | 873 | struct iscsit_cmd *cmd; |
e48354ce | 874 | |
676687c6 | 875 | cmd = iscsit_allocate_cmd(conn, TASK_RUNNING); |
e48354ce NB |
876 | if (!cmd) |
877 | return -1; | |
878 | ||
879 | cmd->iscsi_opcode = ISCSI_OP_NOOP_IN; | |
880 | state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE : | |
881 | ISTATE_SEND_NOPIN_NO_RESPONSE; | |
66c7db68 | 882 | cmd->init_task_tag = RESERVED_ITT; |
c1e34b64 SG |
883 | cmd->targ_xfer_tag = (want_response) ? |
884 | session_get_next_ttt(conn->sess) : 0xFFFFFFFF; | |
e48354ce | 885 | spin_lock_bh(&conn->cmd_lock); |
2fbb471e | 886 | list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list); |
e48354ce NB |
887 | spin_unlock_bh(&conn->cmd_lock); |
888 | ||
889 | if (want_response) | |
890 | iscsit_start_nopin_response_timer(conn); | |
891 | iscsit_add_cmd_to_immediate_queue(cmd, conn, state); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
f7c9564a | 896 | void iscsit_handle_nopin_response_timeout(struct timer_list *t) |
e48354ce | 897 | { |
be36d683 | 898 | struct iscsit_conn *conn = from_timer(conn, t, nopin_response_timer); |
0873fe44 | 899 | struct iscsit_session *sess = conn->sess; |
e48354ce NB |
900 | |
901 | iscsit_inc_conn_usage_count(conn); | |
902 | ||
903 | spin_lock_bh(&conn->nopin_timer_lock); | |
904 | if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) { | |
905 | spin_unlock_bh(&conn->nopin_timer_lock); | |
906 | iscsit_dec_conn_usage_count(conn); | |
907 | return; | |
908 | } | |
909 | ||
c62ae300 DD |
910 | pr_err("Did not receive response to NOPIN on CID: %hu, failing" |
911 | " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n", | |
912 | conn->cid, sess->sess_ops->InitiatorName, sess->isid, | |
913 | sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt); | |
e48354ce NB |
914 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; |
915 | spin_unlock_bh(&conn->nopin_timer_lock); | |
916 | ||
dce6190c | 917 | iscsit_fill_cxn_timeout_err_stats(sess); |
e48354ce NB |
918 | iscsit_cause_connection_reinstatement(conn, 0); |
919 | iscsit_dec_conn_usage_count(conn); | |
920 | } | |
921 | ||
be36d683 | 922 | void iscsit_mod_nopin_response_timer(struct iscsit_conn *conn) |
e48354ce | 923 | { |
0873fe44 | 924 | struct iscsit_session *sess = conn->sess; |
e48354ce NB |
925 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
926 | ||
927 | spin_lock_bh(&conn->nopin_timer_lock); | |
928 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
929 | spin_unlock_bh(&conn->nopin_timer_lock); | |
930 | return; | |
931 | } | |
932 | ||
933 | mod_timer(&conn->nopin_response_timer, | |
934 | (get_jiffies_64() + na->nopin_response_timeout * HZ)); | |
935 | spin_unlock_bh(&conn->nopin_timer_lock); | |
936 | } | |
937 | ||
be36d683 | 938 | void iscsit_start_nopin_response_timer(struct iscsit_conn *conn) |
e48354ce | 939 | { |
0873fe44 | 940 | struct iscsit_session *sess = conn->sess; |
e48354ce NB |
941 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
942 | ||
943 | spin_lock_bh(&conn->nopin_timer_lock); | |
944 | if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) { | |
945 | spin_unlock_bh(&conn->nopin_timer_lock); | |
946 | return; | |
947 | } | |
948 | ||
e48354ce NB |
949 | conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP; |
950 | conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING; | |
8a47aa9d BVA |
951 | mod_timer(&conn->nopin_response_timer, |
952 | jiffies + na->nopin_response_timeout * HZ); | |
e48354ce NB |
953 | |
954 | pr_debug("Started NOPIN Response Timer on CID: %d to %u" | |
955 | " seconds\n", conn->cid, na->nopin_response_timeout); | |
956 | spin_unlock_bh(&conn->nopin_timer_lock); | |
957 | } | |
958 | ||
be36d683 | 959 | void iscsit_stop_nopin_response_timer(struct iscsit_conn *conn) |
e48354ce NB |
960 | { |
961 | spin_lock_bh(&conn->nopin_timer_lock); | |
962 | if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) { | |
963 | spin_unlock_bh(&conn->nopin_timer_lock); | |
964 | return; | |
965 | } | |
966 | conn->nopin_response_timer_flags |= ISCSI_TF_STOP; | |
967 | spin_unlock_bh(&conn->nopin_timer_lock); | |
968 | ||
969 | del_timer_sync(&conn->nopin_response_timer); | |
970 | ||
971 | spin_lock_bh(&conn->nopin_timer_lock); | |
972 | conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING; | |
973 | spin_unlock_bh(&conn->nopin_timer_lock); | |
974 | } | |
975 | ||
f7c9564a | 976 | void iscsit_handle_nopin_timeout(struct timer_list *t) |
e48354ce | 977 | { |
be36d683 | 978 | struct iscsit_conn *conn = from_timer(conn, t, nopin_timer); |
e48354ce NB |
979 | |
980 | iscsit_inc_conn_usage_count(conn); | |
981 | ||
982 | spin_lock_bh(&conn->nopin_timer_lock); | |
983 | if (conn->nopin_timer_flags & ISCSI_TF_STOP) { | |
984 | spin_unlock_bh(&conn->nopin_timer_lock); | |
985 | iscsit_dec_conn_usage_count(conn); | |
986 | return; | |
987 | } | |
988 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
989 | spin_unlock_bh(&conn->nopin_timer_lock); | |
990 | ||
991 | iscsit_add_nopin(conn, 1); | |
992 | iscsit_dec_conn_usage_count(conn); | |
993 | } | |
994 | ||
be36d683 | 995 | void __iscsit_start_nopin_timer(struct iscsit_conn *conn) |
e48354ce | 996 | { |
0873fe44 | 997 | struct iscsit_session *sess = conn->sess; |
e48354ce | 998 | struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess); |
618baaf7 BVA |
999 | |
1000 | lockdep_assert_held(&conn->nopin_timer_lock); | |
1001 | ||
e48354ce NB |
1002 | /* |
1003 | * NOPIN timeout is disabled. | |
1004 | */ | |
1005 | if (!na->nopin_timeout) | |
1006 | return; | |
1007 | ||
1008 | if (conn->nopin_timer_flags & ISCSI_TF_RUNNING) | |
1009 | return; | |
1010 | ||
e48354ce NB |
1011 | conn->nopin_timer_flags &= ~ISCSI_TF_STOP; |
1012 | conn->nopin_timer_flags |= ISCSI_TF_RUNNING; | |
8a47aa9d | 1013 | mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ); |
e48354ce NB |
1014 | |
1015 | pr_debug("Started NOPIN Timer on CID: %d at %u second" | |
1016 | " interval\n", conn->cid, na->nopin_timeout); | |
1017 | } | |
1018 | ||
be36d683 | 1019 | void iscsit_start_nopin_timer(struct iscsit_conn *conn) |
e48354ce | 1020 | { |
e48354ce | 1021 | spin_lock_bh(&conn->nopin_timer_lock); |
aeb50279 | 1022 | __iscsit_start_nopin_timer(conn); |
e48354ce NB |
1023 | spin_unlock_bh(&conn->nopin_timer_lock); |
1024 | } | |
1025 | ||
be36d683 | 1026 | void iscsit_stop_nopin_timer(struct iscsit_conn *conn) |
e48354ce NB |
1027 | { |
1028 | spin_lock_bh(&conn->nopin_timer_lock); | |
1029 | if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) { | |
1030 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1031 | return; | |
1032 | } | |
1033 | conn->nopin_timer_flags |= ISCSI_TF_STOP; | |
1034 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1035 | ||
1036 | del_timer_sync(&conn->nopin_timer); | |
1037 | ||
1038 | spin_lock_bh(&conn->nopin_timer_lock); | |
1039 | conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING; | |
1040 | spin_unlock_bh(&conn->nopin_timer_lock); | |
1041 | } | |
1042 | ||
13247018 ML |
1043 | void iscsit_login_timeout(struct timer_list *t) |
1044 | { | |
1045 | struct iscsit_conn *conn = from_timer(conn, t, login_timer); | |
1046 | struct iscsi_login *login = conn->login; | |
1047 | ||
1048 | pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n"); | |
1049 | ||
1050 | spin_lock_bh(&conn->login_timer_lock); | |
1051 | login->login_failed = 1; | |
1052 | ||
1053 | if (conn->login_kworker) { | |
1054 | pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n", | |
1055 | conn->login_kworker->comm, conn->login_kworker->pid); | |
1056 | send_sig(SIGINT, conn->login_kworker, 1); | |
1057 | } else { | |
1058 | schedule_delayed_work(&conn->login_work, 0); | |
1059 | } | |
1060 | spin_unlock_bh(&conn->login_timer_lock); | |
1061 | } | |
1062 | ||
1063 | void iscsit_start_login_timer(struct iscsit_conn *conn, struct task_struct *kthr) | |
1064 | { | |
1065 | pr_debug("Login timer started\n"); | |
1066 | ||
1067 | conn->login_kworker = kthr; | |
1068 | mod_timer(&conn->login_timer, jiffies + TA_LOGIN_TIMEOUT * HZ); | |
1069 | } | |
1070 | ||
1071 | int iscsit_set_login_timer_kworker(struct iscsit_conn *conn, struct task_struct *kthr) | |
1072 | { | |
1073 | struct iscsi_login *login = conn->login; | |
1074 | int ret = 0; | |
1075 | ||
1076 | spin_lock_bh(&conn->login_timer_lock); | |
1077 | if (login->login_failed) { | |
1078 | /* The timer has already expired */ | |
1079 | ret = -1; | |
1080 | } else { | |
1081 | conn->login_kworker = kthr; | |
1082 | } | |
1083 | spin_unlock_bh(&conn->login_timer_lock); | |
1084 | ||
1085 | return ret; | |
1086 | } | |
1087 | ||
1088 | void iscsit_stop_login_timer(struct iscsit_conn *conn) | |
1089 | { | |
1090 | pr_debug("Login timer stopped\n"); | |
1091 | timer_delete_sync(&conn->login_timer); | |
1092 | } | |
1093 | ||
e48354ce | 1094 | int iscsit_send_tx_data( |
66cd9d4e | 1095 | struct iscsit_cmd *cmd, |
be36d683 | 1096 | struct iscsit_conn *conn, |
e48354ce NB |
1097 | int use_misc) |
1098 | { | |
1099 | int tx_sent, tx_size; | |
1100 | u32 iov_count; | |
1101 | struct kvec *iov; | |
1102 | ||
1103 | send_data: | |
1104 | tx_size = cmd->tx_size; | |
1105 | ||
1106 | if (!use_misc) { | |
1107 | iov = &cmd->iov_data[0]; | |
1108 | iov_count = cmd->iov_data_count; | |
1109 | } else { | |
1110 | iov = &cmd->iov_misc[0]; | |
1111 | iov_count = cmd->iov_misc_count; | |
1112 | } | |
1113 | ||
1114 | tx_sent = tx_data(conn, &iov[0], iov_count, tx_size); | |
1115 | if (tx_size != tx_sent) { | |
1116 | if (tx_sent == -EAGAIN) { | |
1117 | pr_err("tx_data() returned -EAGAIN\n"); | |
1118 | goto send_data; | |
1119 | } else | |
1120 | return -1; | |
1121 | } | |
1122 | cmd->tx_size = 0; | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | int iscsit_fe_sendpage_sg( | |
66cd9d4e | 1128 | struct iscsit_cmd *cmd, |
be36d683 | 1129 | struct iscsit_conn *conn) |
e48354ce NB |
1130 | { |
1131 | struct scatterlist *sg = cmd->first_data_sg; | |
d2fe2107 DH |
1132 | struct bio_vec bvec; |
1133 | struct msghdr msghdr = { .msg_flags = MSG_SPLICE_PAGES, }; | |
e48354ce NB |
1134 | struct kvec iov; |
1135 | u32 tx_hdr_size, data_len; | |
1136 | u32 offset = cmd->first_data_sg_off; | |
40b05497 | 1137 | int tx_sent, iov_off; |
e48354ce NB |
1138 | |
1139 | send_hdr: | |
1140 | tx_hdr_size = ISCSI_HDR_LEN; | |
1141 | if (conn->conn_ops->HeaderDigest) | |
1142 | tx_hdr_size += ISCSI_CRC_LEN; | |
1143 | ||
1144 | iov.iov_base = cmd->pdu; | |
1145 | iov.iov_len = tx_hdr_size; | |
1146 | ||
1147 | tx_sent = tx_data(conn, &iov, 1, tx_hdr_size); | |
1148 | if (tx_hdr_size != tx_sent) { | |
1149 | if (tx_sent == -EAGAIN) { | |
1150 | pr_err("tx_data() returned -EAGAIN\n"); | |
1151 | goto send_hdr; | |
1152 | } | |
1153 | return -1; | |
1154 | } | |
1155 | ||
1156 | data_len = cmd->tx_size - tx_hdr_size - cmd->padding; | |
40b05497 NB |
1157 | /* |
1158 | * Set iov_off used by padding and data digest tx_data() calls below | |
1159 | * in order to determine proper offset into cmd->iov_data[] | |
1160 | */ | |
1161 | if (conn->conn_ops->DataDigest) { | |
e48354ce | 1162 | data_len -= ISCSI_CRC_LEN; |
40b05497 NB |
1163 | if (cmd->padding) |
1164 | iov_off = (cmd->iov_data_count - 2); | |
1165 | else | |
1166 | iov_off = (cmd->iov_data_count - 1); | |
1167 | } else { | |
1168 | iov_off = (cmd->iov_data_count - 1); | |
1169 | } | |
e48354ce NB |
1170 | /* |
1171 | * Perform sendpage() for each page in the scatterlist | |
1172 | */ | |
1173 | while (data_len) { | |
1174 | u32 space = (sg->length - offset); | |
1175 | u32 sub_len = min_t(u32, data_len, space); | |
1176 | send_pg: | |
d2fe2107 DH |
1177 | bvec_set_page(&bvec, sg_page(sg), sub_len, sg->offset + offset); |
1178 | iov_iter_bvec(&msghdr.msg_iter, ITER_SOURCE, &bvec, 1, sub_len); | |
1179 | ||
1180 | tx_sent = conn->sock->ops->sendmsg(conn->sock, &msghdr, | |
1181 | sub_len); | |
e48354ce NB |
1182 | if (tx_sent != sub_len) { |
1183 | if (tx_sent == -EAGAIN) { | |
d2fe2107 | 1184 | pr_err("sendmsg/splice returned -EAGAIN\n"); |
e48354ce NB |
1185 | goto send_pg; |
1186 | } | |
1187 | ||
d2fe2107 | 1188 | pr_err("sendmsg/splice failure: %d\n", tx_sent); |
e48354ce NB |
1189 | return -1; |
1190 | } | |
1191 | ||
1192 | data_len -= sub_len; | |
1193 | offset = 0; | |
1194 | sg = sg_next(sg); | |
1195 | } | |
1196 | ||
1197 | send_padding: | |
1198 | if (cmd->padding) { | |
40b05497 | 1199 | struct kvec *iov_p = &cmd->iov_data[iov_off++]; |
e48354ce NB |
1200 | |
1201 | tx_sent = tx_data(conn, iov_p, 1, cmd->padding); | |
1202 | if (cmd->padding != tx_sent) { | |
1203 | if (tx_sent == -EAGAIN) { | |
1204 | pr_err("tx_data() returned -EAGAIN\n"); | |
1205 | goto send_padding; | |
1206 | } | |
1207 | return -1; | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | send_datacrc: | |
1212 | if (conn->conn_ops->DataDigest) { | |
40b05497 | 1213 | struct kvec *iov_d = &cmd->iov_data[iov_off]; |
e48354ce NB |
1214 | |
1215 | tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN); | |
1216 | if (ISCSI_CRC_LEN != tx_sent) { | |
1217 | if (tx_sent == -EAGAIN) { | |
1218 | pr_err("tx_data() returned -EAGAIN\n"); | |
1219 | goto send_datacrc; | |
1220 | } | |
1221 | return -1; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU | |
1230 | * back to the Initiator when an expection condition occurs with the | |
1231 | * errors set in status_class and status_detail. | |
1232 | * | |
1233 | * Parameters: iSCSI Connection, Status Class, Status Detail. | |
1234 | * Returns: 0 on success, -1 on error. | |
1235 | */ | |
be36d683 | 1236 | int iscsit_tx_login_rsp(struct iscsit_conn *conn, u8 status_class, u8 status_detail) |
e48354ce | 1237 | { |
e48354ce | 1238 | struct iscsi_login_rsp *hdr; |
baa4d64b | 1239 | struct iscsi_login *login = conn->conn_login; |
e48354ce | 1240 | |
baa4d64b | 1241 | login->login_failed = 1; |
e48354ce NB |
1242 | iscsit_collect_login_stats(conn, status_class, status_detail); |
1243 | ||
68349756 NB |
1244 | memset(&login->rsp[0], 0, ISCSI_HDR_LEN); |
1245 | ||
baa4d64b | 1246 | hdr = (struct iscsi_login_rsp *)&login->rsp[0]; |
e48354ce NB |
1247 | hdr->opcode = ISCSI_OP_LOGIN_RSP; |
1248 | hdr->status_class = status_class; | |
1249 | hdr->status_detail = status_detail; | |
66c7db68 | 1250 | hdr->itt = conn->login_itt; |
e48354ce | 1251 | |
baa4d64b | 1252 | return conn->conn_transport->iscsit_put_login_tx(conn, login, 0); |
e48354ce NB |
1253 | } |
1254 | ||
0873fe44 | 1255 | void iscsit_print_session_params(struct iscsit_session *sess) |
e48354ce | 1256 | { |
be36d683 | 1257 | struct iscsit_conn *conn; |
e48354ce NB |
1258 | |
1259 | pr_debug("-----------------------------[Session Params for" | |
1260 | " SID: %u]-----------------------------\n", sess->sid); | |
1261 | spin_lock_bh(&sess->conn_lock); | |
1262 | list_for_each_entry(conn, &sess->sess_conn_list, conn_list) | |
1263 | iscsi_dump_conn_ops(conn->conn_ops); | |
1264 | spin_unlock_bh(&sess->conn_lock); | |
1265 | ||
1266 | iscsi_dump_sess_ops(sess->sess_ops); | |
1267 | } | |
1268 | ||
7c59dace | 1269 | int rx_data( |
be36d683 | 1270 | struct iscsit_conn *conn, |
7c59dace ML |
1271 | struct kvec *iov, |
1272 | int iov_count, | |
1273 | int data) | |
e48354ce | 1274 | { |
7c59dace | 1275 | int rx_loop = 0, total_rx = 0; |
e48354ce NB |
1276 | struct msghdr msg; |
1277 | ||
1278 | if (!conn || !conn->sock || !conn->conn_ops) | |
1279 | return -1; | |
1280 | ||
1281 | memset(&msg, 0, sizeof(struct msghdr)); | |
de4eda9d | 1282 | iov_iter_kvec(&msg.msg_iter, ITER_DEST, iov, iov_count, data); |
e48354ce | 1283 | |
2da62906 AV |
1284 | while (msg_data_left(&msg)) { |
1285 | rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL); | |
e48354ce NB |
1286 | if (rx_loop <= 0) { |
1287 | pr_debug("rx_loop: %d total_rx: %d\n", | |
1288 | rx_loop, total_rx); | |
1289 | return rx_loop; | |
1290 | } | |
1291 | total_rx += rx_loop; | |
1292 | pr_debug("rx_loop: %d, total_rx: %d, data: %d\n", | |
1293 | rx_loop, total_rx, data); | |
1294 | } | |
1295 | ||
e48354ce NB |
1296 | return total_rx; |
1297 | } | |
1298 | ||
e48354ce | 1299 | int tx_data( |
be36d683 | 1300 | struct iscsit_conn *conn, |
e48354ce NB |
1301 | struct kvec *iov, |
1302 | int iov_count, | |
1303 | int data) | |
1304 | { | |
4113e47b AV |
1305 | struct msghdr msg; |
1306 | int total_tx = 0; | |
e48354ce NB |
1307 | |
1308 | if (!conn || !conn->sock || !conn->conn_ops) | |
1309 | return -1; | |
1310 | ||
4113e47b AV |
1311 | if (data <= 0) { |
1312 | pr_err("Data length is: %d\n", data); | |
1313 | return -1; | |
1314 | } | |
1315 | ||
1316 | memset(&msg, 0, sizeof(struct msghdr)); | |
1317 | ||
de4eda9d | 1318 | iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, iov, iov_count, data); |
4113e47b AV |
1319 | |
1320 | while (msg_data_left(&msg)) { | |
1321 | int tx_loop = sock_sendmsg(conn->sock, &msg); | |
1322 | if (tx_loop <= 0) { | |
1323 | pr_debug("tx_loop: %d total_tx %d\n", | |
1324 | tx_loop, total_tx); | |
1325 | return tx_loop; | |
1326 | } | |
1327 | total_tx += tx_loop; | |
1328 | pr_debug("tx_loop: %d, total_tx: %d, data: %d\n", | |
1329 | tx_loop, total_tx, data); | |
1330 | } | |
e48354ce | 1331 | |
4113e47b | 1332 | return total_tx; |
e48354ce NB |
1333 | } |
1334 | ||
1335 | void iscsit_collect_login_stats( | |
be36d683 | 1336 | struct iscsit_conn *conn, |
e48354ce NB |
1337 | u8 status_class, |
1338 | u8 status_detail) | |
1339 | { | |
1340 | struct iscsi_param *intrname = NULL; | |
1341 | struct iscsi_tiqn *tiqn; | |
1342 | struct iscsi_login_stats *ls; | |
1343 | ||
1344 | tiqn = iscsit_snmp_get_tiqn(conn); | |
1345 | if (!tiqn) | |
1346 | return; | |
1347 | ||
1348 | ls = &tiqn->login_stats; | |
1349 | ||
1350 | spin_lock(&ls->lock); | |
e48354ce NB |
1351 | if (status_class == ISCSI_STATUS_CLS_SUCCESS) |
1352 | ls->accepts++; | |
1353 | else if (status_class == ISCSI_STATUS_CLS_REDIRECT) { | |
1354 | ls->redirects++; | |
1355 | ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT; | |
1356 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1357 | (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) { | |
1358 | ls->authenticate_fails++; | |
1359 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE; | |
1360 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1361 | (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) { | |
1362 | ls->authorize_fails++; | |
1363 | ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE; | |
1364 | } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) && | |
1365 | (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) { | |
1366 | ls->negotiate_fails++; | |
1367 | ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE; | |
1368 | } else { | |
1369 | ls->other_fails++; | |
1370 | ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER; | |
1371 | } | |
1372 | ||
1373 | /* Save initiator name, ip address and time, if it is a failed login */ | |
1374 | if (status_class != ISCSI_STATUS_CLS_SUCCESS) { | |
1375 | if (conn->param_list) | |
1376 | intrname = iscsi_find_param_from_key(INITIATORNAME, | |
1377 | conn->param_list); | |
fdc84d11 JE |
1378 | strlcpy(ls->last_intr_fail_name, |
1379 | (intrname ? intrname->value : "Unknown"), | |
1380 | sizeof(ls->last_intr_fail_name)); | |
e48354ce | 1381 | |
baa4d64b NB |
1382 | ls->last_intr_fail_ip_family = conn->login_family; |
1383 | ||
dc58f760 | 1384 | ls->last_intr_fail_sockaddr = conn->login_sockaddr; |
e48354ce NB |
1385 | ls->last_fail_time = get_jiffies_64(); |
1386 | } | |
1387 | ||
1388 | spin_unlock(&ls->lock); | |
1389 | } | |
1390 | ||
be36d683 | 1391 | struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsit_conn *conn) |
e48354ce NB |
1392 | { |
1393 | struct iscsi_portal_group *tpg; | |
1394 | ||
17c61ad6 | 1395 | if (!conn) |
e48354ce NB |
1396 | return NULL; |
1397 | ||
17c61ad6 | 1398 | tpg = conn->tpg; |
e48354ce NB |
1399 | if (!tpg) |
1400 | return NULL; | |
1401 | ||
1402 | if (!tpg->tpg_tiqn) | |
1403 | return NULL; | |
1404 | ||
1405 | return tpg->tpg_tiqn; | |
1406 | } | |
dce6190c | 1407 | |
0873fe44 | 1408 | void iscsit_fill_cxn_timeout_err_stats(struct iscsit_session *sess) |
dce6190c DD |
1409 | { |
1410 | struct iscsi_portal_group *tpg = sess->tpg; | |
1411 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
1412 | ||
1413 | if (!tiqn) | |
1414 | return; | |
1415 | ||
1416 | spin_lock_bh(&tiqn->sess_err_stats.lock); | |
1417 | strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
1418 | sess->sess_ops->InitiatorName, | |
1419 | sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name)); | |
1420 | tiqn->sess_err_stats.last_sess_failure_type = | |
1421 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
1422 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
1423 | atomic_long_inc(&sess->conn_timeout_errors); | |
1424 | spin_unlock_bh(&tiqn->sess_err_stats.lock); | |
1425 | } |