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e48354ce NB |
1 | /****************************************************************************** |
2 | * This file contains error recovery level zero functions used by | |
3 | * the iSCSI Target driver. | |
4 | * | |
4c76251e | 5 | * (c) Copyright 2007-2013 Datera, Inc. |
e48354ce NB |
6 | * |
7 | * Author: Nicholas A. Bellinger <nab@linux-iscsi.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | ******************************************************************************/ | |
19 | ||
20 | #include <scsi/iscsi_proto.h> | |
21 | #include <target/target_core_base.h> | |
c4795fb2 | 22 | #include <target/target_core_fabric.h> |
e48354ce | 23 | |
67f091f2 | 24 | #include <target/iscsi/iscsi_target_core.h> |
e48354ce NB |
25 | #include "iscsi_target_seq_pdu_list.h" |
26 | #include "iscsi_target_tq.h" | |
27 | #include "iscsi_target_erl0.h" | |
28 | #include "iscsi_target_erl1.h" | |
29 | #include "iscsi_target_erl2.h" | |
30 | #include "iscsi_target_util.h" | |
31 | #include "iscsi_target.h" | |
32 | ||
33 | /* | |
34 | * Used to set values in struct iscsi_cmd that iscsit_dataout_check_sequence() | |
35 | * checks against to determine a PDU's Offset+Length is within the current | |
36 | * DataOUT Sequence. Used for DataSequenceInOrder=Yes only. | |
37 | */ | |
38 | void iscsit_set_dataout_sequence_values( | |
39 | struct iscsi_cmd *cmd) | |
40 | { | |
41 | struct iscsi_conn *conn = cmd->conn; | |
42 | /* | |
43 | * Still set seq_start_offset and seq_end_offset for Unsolicited | |
44 | * DataOUT, even if DataSequenceInOrder=No. | |
45 | */ | |
46 | if (cmd->unsolicited_data) { | |
47 | cmd->seq_start_offset = cmd->write_data_done; | |
48 | cmd->seq_end_offset = (cmd->write_data_done + | |
d7ca663c DC |
49 | ((cmd->se_cmd.data_length > |
50 | conn->sess->sess_ops->FirstBurstLength) ? | |
51 | conn->sess->sess_ops->FirstBurstLength : cmd->se_cmd.data_length)); | |
e48354ce NB |
52 | return; |
53 | } | |
54 | ||
55 | if (!conn->sess->sess_ops->DataSequenceInOrder) | |
56 | return; | |
57 | ||
58 | if (!cmd->seq_start_offset && !cmd->seq_end_offset) { | |
59 | cmd->seq_start_offset = cmd->write_data_done; | |
ebf1d95c | 60 | cmd->seq_end_offset = (cmd->se_cmd.data_length > |
e48354ce NB |
61 | conn->sess->sess_ops->MaxBurstLength) ? |
62 | (cmd->write_data_done + | |
ebf1d95c | 63 | conn->sess->sess_ops->MaxBurstLength) : cmd->se_cmd.data_length; |
e48354ce NB |
64 | } else { |
65 | cmd->seq_start_offset = cmd->seq_end_offset; | |
66 | cmd->seq_end_offset = ((cmd->seq_end_offset + | |
67 | conn->sess->sess_ops->MaxBurstLength) >= | |
ebf1d95c | 68 | cmd->se_cmd.data_length) ? cmd->se_cmd.data_length : |
e48354ce NB |
69 | (cmd->seq_end_offset + |
70 | conn->sess->sess_ops->MaxBurstLength); | |
71 | } | |
72 | } | |
73 | ||
74 | static int iscsit_dataout_within_command_recovery_check( | |
75 | struct iscsi_cmd *cmd, | |
76 | unsigned char *buf) | |
77 | { | |
78 | struct iscsi_conn *conn = cmd->conn; | |
79 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
80 | u32 payload_length = ntoh24(hdr->dlength); | |
81 | ||
82 | /* | |
83 | * We do the within-command recovery checks here as it is | |
84 | * the first function called in iscsi_check_pre_dataout(). | |
85 | * Basically, if we are in within-command recovery and | |
86 | * the PDU does not contain the offset the sequence needs, | |
87 | * dump the payload. | |
88 | * | |
89 | * This only applies to DataPDUInOrder=Yes, for | |
90 | * DataPDUInOrder=No we only re-request the failed PDU | |
91 | * and check that all PDUs in a sequence are received | |
92 | * upon end of sequence. | |
93 | */ | |
94 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
95 | if ((cmd->cmd_flags & ICF_WITHIN_COMMAND_RECOVERY) && | |
50e5c87d | 96 | cmd->write_data_done != be32_to_cpu(hdr->offset)) |
e48354ce NB |
97 | goto dump; |
98 | ||
99 | cmd->cmd_flags &= ~ICF_WITHIN_COMMAND_RECOVERY; | |
100 | } else { | |
101 | struct iscsi_seq *seq; | |
102 | ||
50e5c87d CH |
103 | seq = iscsit_get_seq_holder(cmd, be32_to_cpu(hdr->offset), |
104 | payload_length); | |
e48354ce NB |
105 | if (!seq) |
106 | return DATAOUT_CANNOT_RECOVER; | |
107 | /* | |
108 | * Set the struct iscsi_seq pointer to reuse later. | |
109 | */ | |
110 | cmd->seq_ptr = seq; | |
111 | ||
112 | if (conn->sess->sess_ops->DataPDUInOrder) { | |
50e5c87d CH |
113 | if (seq->status == |
114 | DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY && | |
115 | (seq->offset != be32_to_cpu(hdr->offset) || | |
116 | seq->data_sn != be32_to_cpu(hdr->datasn))) | |
e48354ce NB |
117 | goto dump; |
118 | } else { | |
50e5c87d CH |
119 | if (seq->status == |
120 | DATAOUT_SEQUENCE_WITHIN_COMMAND_RECOVERY && | |
121 | seq->data_sn != be32_to_cpu(hdr->datasn)) | |
e48354ce NB |
122 | goto dump; |
123 | } | |
124 | ||
125 | if (seq->status == DATAOUT_SEQUENCE_COMPLETE) | |
126 | goto dump; | |
127 | ||
128 | if (seq->status != DATAOUT_SEQUENCE_COMPLETE) | |
129 | seq->status = 0; | |
130 | } | |
131 | ||
132 | return DATAOUT_NORMAL; | |
133 | ||
134 | dump: | |
135 | pr_err("Dumping DataOUT PDU Offset: %u Length: %d DataSN:" | |
136 | " 0x%08x\n", hdr->offset, payload_length, hdr->datasn); | |
137 | return iscsit_dump_data_payload(conn, payload_length, 1); | |
138 | } | |
139 | ||
140 | static int iscsit_dataout_check_unsolicited_sequence( | |
141 | struct iscsi_cmd *cmd, | |
142 | unsigned char *buf) | |
143 | { | |
144 | u32 first_burst_len; | |
145 | struct iscsi_conn *conn = cmd->conn; | |
146 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
147 | u32 payload_length = ntoh24(hdr->dlength); | |
148 | ||
149 | ||
50e5c87d CH |
150 | if ((be32_to_cpu(hdr->offset) < cmd->seq_start_offset) || |
151 | ((be32_to_cpu(hdr->offset) + payload_length) > cmd->seq_end_offset)) { | |
e48354ce NB |
152 | pr_err("Command ITT: 0x%08x with Offset: %u," |
153 | " Length: %u outside of Unsolicited Sequence %u:%u while" | |
154 | " DataSequenceInOrder=Yes.\n", cmd->init_task_tag, | |
50e5c87d | 155 | be32_to_cpu(hdr->offset), payload_length, cmd->seq_start_offset, |
e48354ce NB |
156 | cmd->seq_end_offset); |
157 | return DATAOUT_CANNOT_RECOVER; | |
158 | } | |
159 | ||
160 | first_burst_len = (cmd->first_burst_len + payload_length); | |
161 | ||
162 | if (first_burst_len > conn->sess->sess_ops->FirstBurstLength) { | |
163 | pr_err("Total %u bytes exceeds FirstBurstLength: %u" | |
164 | " for this Unsolicited DataOut Burst.\n", | |
165 | first_burst_len, conn->sess->sess_ops->FirstBurstLength); | |
166 | transport_send_check_condition_and_sense(&cmd->se_cmd, | |
167 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
168 | return DATAOUT_CANNOT_RECOVER; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Perform various MaxBurstLength and ISCSI_FLAG_CMD_FINAL sanity | |
173 | * checks for the current Unsolicited DataOUT Sequence. | |
174 | */ | |
175 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) { | |
176 | /* | |
177 | * Ignore ISCSI_FLAG_CMD_FINAL checks while DataPDUInOrder=No, end of | |
178 | * sequence checks are handled in | |
179 | * iscsit_dataout_datapduinorder_no_fbit(). | |
180 | */ | |
181 | if (!conn->sess->sess_ops->DataPDUInOrder) | |
182 | goto out; | |
183 | ||
ebf1d95c | 184 | if ((first_burst_len != cmd->se_cmd.data_length) && |
e48354ce NB |
185 | (first_burst_len != conn->sess->sess_ops->FirstBurstLength)) { |
186 | pr_err("Unsolicited non-immediate data" | |
187 | " received %u does not equal FirstBurstLength: %u, and" | |
188 | " does not equal ExpXferLen %u.\n", first_burst_len, | |
189 | conn->sess->sess_ops->FirstBurstLength, | |
ebf1d95c | 190 | cmd->se_cmd.data_length); |
e48354ce NB |
191 | transport_send_check_condition_and_sense(&cmd->se_cmd, |
192 | TCM_INCORRECT_AMOUNT_OF_DATA, 0); | |
193 | return DATAOUT_CANNOT_RECOVER; | |
194 | } | |
195 | } else { | |
196 | if (first_burst_len == conn->sess->sess_ops->FirstBurstLength) { | |
197 | pr_err("Command ITT: 0x%08x reached" | |
198 | " FirstBurstLength: %u, but ISCSI_FLAG_CMD_FINAL is not set. protocol" | |
199 | " error.\n", cmd->init_task_tag, | |
200 | conn->sess->sess_ops->FirstBurstLength); | |
201 | return DATAOUT_CANNOT_RECOVER; | |
202 | } | |
ebf1d95c | 203 | if (first_burst_len == cmd->se_cmd.data_length) { |
e48354ce NB |
204 | pr_err("Command ITT: 0x%08x reached" |
205 | " ExpXferLen: %u, but ISCSI_FLAG_CMD_FINAL is not set. protocol" | |
ebf1d95c | 206 | " error.\n", cmd->init_task_tag, cmd->se_cmd.data_length); |
e48354ce NB |
207 | return DATAOUT_CANNOT_RECOVER; |
208 | } | |
209 | } | |
210 | ||
211 | out: | |
212 | return DATAOUT_NORMAL; | |
213 | } | |
214 | ||
215 | static int iscsit_dataout_check_sequence( | |
216 | struct iscsi_cmd *cmd, | |
217 | unsigned char *buf) | |
218 | { | |
219 | u32 next_burst_len; | |
220 | struct iscsi_conn *conn = cmd->conn; | |
221 | struct iscsi_seq *seq = NULL; | |
222 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
223 | u32 payload_length = ntoh24(hdr->dlength); | |
224 | ||
225 | /* | |
226 | * For DataSequenceInOrder=Yes: Check that the offset and offset+length | |
227 | * is within range as defined by iscsi_set_dataout_sequence_values(). | |
228 | * | |
229 | * For DataSequenceInOrder=No: Check that an struct iscsi_seq exists for | |
230 | * offset+length tuple. | |
231 | */ | |
232 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
233 | /* | |
234 | * Due to possibility of recovery DataOUT sent by the initiator | |
235 | * fullfilling an Recovery R2T, it's best to just dump the | |
236 | * payload here, instead of erroring out. | |
237 | */ | |
50e5c87d CH |
238 | if ((be32_to_cpu(hdr->offset) < cmd->seq_start_offset) || |
239 | ((be32_to_cpu(hdr->offset) + payload_length) > cmd->seq_end_offset)) { | |
e48354ce NB |
240 | pr_err("Command ITT: 0x%08x with Offset: %u," |
241 | " Length: %u outside of Sequence %u:%u while" | |
242 | " DataSequenceInOrder=Yes.\n", cmd->init_task_tag, | |
50e5c87d | 243 | be32_to_cpu(hdr->offset), payload_length, cmd->seq_start_offset, |
e48354ce NB |
244 | cmd->seq_end_offset); |
245 | ||
246 | if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) | |
247 | return DATAOUT_CANNOT_RECOVER; | |
248 | return DATAOUT_WITHIN_COMMAND_RECOVERY; | |
249 | } | |
250 | ||
251 | next_burst_len = (cmd->next_burst_len + payload_length); | |
252 | } else { | |
50e5c87d CH |
253 | seq = iscsit_get_seq_holder(cmd, be32_to_cpu(hdr->offset), |
254 | payload_length); | |
e48354ce NB |
255 | if (!seq) |
256 | return DATAOUT_CANNOT_RECOVER; | |
257 | /* | |
258 | * Set the struct iscsi_seq pointer to reuse later. | |
259 | */ | |
260 | cmd->seq_ptr = seq; | |
261 | ||
262 | if (seq->status == DATAOUT_SEQUENCE_COMPLETE) { | |
263 | if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) | |
264 | return DATAOUT_CANNOT_RECOVER; | |
265 | return DATAOUT_WITHIN_COMMAND_RECOVERY; | |
266 | } | |
267 | ||
268 | next_burst_len = (seq->next_burst_len + payload_length); | |
269 | } | |
270 | ||
271 | if (next_burst_len > conn->sess->sess_ops->MaxBurstLength) { | |
272 | pr_err("Command ITT: 0x%08x, NextBurstLength: %u and" | |
273 | " Length: %u exceeds MaxBurstLength: %u. protocol" | |
274 | " error.\n", cmd->init_task_tag, | |
275 | (next_burst_len - payload_length), | |
276 | payload_length, conn->sess->sess_ops->MaxBurstLength); | |
277 | return DATAOUT_CANNOT_RECOVER; | |
278 | } | |
279 | ||
280 | /* | |
281 | * Perform various MaxBurstLength and ISCSI_FLAG_CMD_FINAL sanity | |
282 | * checks for the current DataOUT Sequence. | |
283 | */ | |
284 | if (hdr->flags & ISCSI_FLAG_CMD_FINAL) { | |
285 | /* | |
286 | * Ignore ISCSI_FLAG_CMD_FINAL checks while DataPDUInOrder=No, end of | |
287 | * sequence checks are handled in | |
288 | * iscsit_dataout_datapduinorder_no_fbit(). | |
289 | */ | |
290 | if (!conn->sess->sess_ops->DataPDUInOrder) | |
291 | goto out; | |
292 | ||
293 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
294 | if ((next_burst_len < | |
295 | conn->sess->sess_ops->MaxBurstLength) && | |
296 | ((cmd->write_data_done + payload_length) < | |
ebf1d95c | 297 | cmd->se_cmd.data_length)) { |
e48354ce NB |
298 | pr_err("Command ITT: 0x%08x set ISCSI_FLAG_CMD_FINAL" |
299 | " before end of DataOUT sequence, protocol" | |
300 | " error.\n", cmd->init_task_tag); | |
301 | return DATAOUT_CANNOT_RECOVER; | |
302 | } | |
303 | } else { | |
304 | if (next_burst_len < seq->xfer_len) { | |
305 | pr_err("Command ITT: 0x%08x set ISCSI_FLAG_CMD_FINAL" | |
306 | " before end of DataOUT sequence, protocol" | |
307 | " error.\n", cmd->init_task_tag); | |
308 | return DATAOUT_CANNOT_RECOVER; | |
309 | } | |
310 | } | |
311 | } else { | |
312 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
313 | if (next_burst_len == | |
314 | conn->sess->sess_ops->MaxBurstLength) { | |
315 | pr_err("Command ITT: 0x%08x reached" | |
316 | " MaxBurstLength: %u, but ISCSI_FLAG_CMD_FINAL is" | |
317 | " not set, protocol error.", cmd->init_task_tag, | |
318 | conn->sess->sess_ops->MaxBurstLength); | |
319 | return DATAOUT_CANNOT_RECOVER; | |
320 | } | |
321 | if ((cmd->write_data_done + payload_length) == | |
ebf1d95c | 322 | cmd->se_cmd.data_length) { |
e48354ce NB |
323 | pr_err("Command ITT: 0x%08x reached" |
324 | " last DataOUT PDU in sequence but ISCSI_FLAG_" | |
325 | "CMD_FINAL is not set, protocol error.\n", | |
326 | cmd->init_task_tag); | |
327 | return DATAOUT_CANNOT_RECOVER; | |
328 | } | |
329 | } else { | |
330 | if (next_burst_len == seq->xfer_len) { | |
331 | pr_err("Command ITT: 0x%08x reached" | |
332 | " last DataOUT PDU in sequence but ISCSI_FLAG_" | |
333 | "CMD_FINAL is not set, protocol error.\n", | |
334 | cmd->init_task_tag); | |
335 | return DATAOUT_CANNOT_RECOVER; | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
340 | out: | |
341 | return DATAOUT_NORMAL; | |
342 | } | |
343 | ||
344 | static int iscsit_dataout_check_datasn( | |
345 | struct iscsi_cmd *cmd, | |
346 | unsigned char *buf) | |
347 | { | |
e48354ce NB |
348 | u32 data_sn = 0; |
349 | struct iscsi_conn *conn = cmd->conn; | |
350 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
351 | u32 payload_length = ntoh24(hdr->dlength); | |
352 | ||
353 | /* | |
354 | * Considering the target has no method of re-requesting DataOUT | |
355 | * by DataSN, if we receieve a greater DataSN than expected we | |
356 | * assume the functions for DataPDUInOrder=[Yes,No] below will | |
357 | * handle it. | |
358 | * | |
359 | * If the DataSN is less than expected, dump the payload. | |
360 | */ | |
361 | if (conn->sess->sess_ops->DataSequenceInOrder) | |
362 | data_sn = cmd->data_sn; | |
363 | else { | |
364 | struct iscsi_seq *seq = cmd->seq_ptr; | |
365 | data_sn = seq->data_sn; | |
366 | } | |
367 | ||
50e5c87d | 368 | if (be32_to_cpu(hdr->datasn) > data_sn) { |
e48354ce NB |
369 | pr_err("Command ITT: 0x%08x, received DataSN: 0x%08x" |
370 | " higher than expected 0x%08x.\n", cmd->init_task_tag, | |
50e5c87d | 371 | be32_to_cpu(hdr->datasn), data_sn); |
e48354ce | 372 | goto recover; |
50e5c87d | 373 | } else if (be32_to_cpu(hdr->datasn) < data_sn) { |
e48354ce NB |
374 | pr_err("Command ITT: 0x%08x, received DataSN: 0x%08x" |
375 | " lower than expected 0x%08x, discarding payload.\n", | |
50e5c87d | 376 | cmd->init_task_tag, be32_to_cpu(hdr->datasn), data_sn); |
e48354ce NB |
377 | goto dump; |
378 | } | |
379 | ||
380 | return DATAOUT_NORMAL; | |
381 | ||
382 | recover: | |
383 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
384 | pr_err("Unable to perform within-command recovery" | |
385 | " while ERL=0.\n"); | |
386 | return DATAOUT_CANNOT_RECOVER; | |
387 | } | |
388 | dump: | |
389 | if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) | |
390 | return DATAOUT_CANNOT_RECOVER; | |
391 | ||
5c22e229 | 392 | return DATAOUT_WITHIN_COMMAND_RECOVERY; |
e48354ce NB |
393 | } |
394 | ||
395 | static int iscsit_dataout_pre_datapduinorder_yes( | |
396 | struct iscsi_cmd *cmd, | |
397 | unsigned char *buf) | |
398 | { | |
399 | int dump = 0, recovery = 0; | |
400 | struct iscsi_conn *conn = cmd->conn; | |
401 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
402 | u32 payload_length = ntoh24(hdr->dlength); | |
403 | ||
404 | /* | |
405 | * For DataSequenceInOrder=Yes: If the offset is greater than the global | |
406 | * DataPDUInOrder=Yes offset counter in struct iscsi_cmd a protcol error has | |
20879696 | 407 | * occurred and fail the connection. |
e48354ce NB |
408 | * |
409 | * For DataSequenceInOrder=No: If the offset is greater than the per | |
410 | * sequence DataPDUInOrder=Yes offset counter in struct iscsi_seq a protocol | |
20879696 | 411 | * error has occurred and fail the connection. |
e48354ce NB |
412 | */ |
413 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
50e5c87d | 414 | if (be32_to_cpu(hdr->offset) != cmd->write_data_done) { |
e48354ce NB |
415 | pr_err("Command ITT: 0x%08x, received offset" |
416 | " %u different than expected %u.\n", cmd->init_task_tag, | |
50e5c87d | 417 | be32_to_cpu(hdr->offset), cmd->write_data_done); |
e48354ce NB |
418 | recovery = 1; |
419 | goto recover; | |
420 | } | |
421 | } else { | |
422 | struct iscsi_seq *seq = cmd->seq_ptr; | |
423 | ||
50e5c87d | 424 | if (be32_to_cpu(hdr->offset) > seq->offset) { |
e48354ce NB |
425 | pr_err("Command ITT: 0x%08x, received offset" |
426 | " %u greater than expected %u.\n", cmd->init_task_tag, | |
50e5c87d | 427 | be32_to_cpu(hdr->offset), seq->offset); |
e48354ce NB |
428 | recovery = 1; |
429 | goto recover; | |
50e5c87d | 430 | } else if (be32_to_cpu(hdr->offset) < seq->offset) { |
e48354ce NB |
431 | pr_err("Command ITT: 0x%08x, received offset" |
432 | " %u less than expected %u, discarding payload.\n", | |
50e5c87d CH |
433 | cmd->init_task_tag, be32_to_cpu(hdr->offset), |
434 | seq->offset); | |
e48354ce NB |
435 | dump = 1; |
436 | goto dump; | |
437 | } | |
438 | } | |
439 | ||
440 | return DATAOUT_NORMAL; | |
441 | ||
442 | recover: | |
443 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
444 | pr_err("Unable to perform within-command recovery" | |
445 | " while ERL=0.\n"); | |
446 | return DATAOUT_CANNOT_RECOVER; | |
447 | } | |
448 | dump: | |
449 | if (iscsit_dump_data_payload(conn, payload_length, 1) < 0) | |
450 | return DATAOUT_CANNOT_RECOVER; | |
451 | ||
452 | return (recovery) ? iscsit_recover_dataout_sequence(cmd, | |
50e5c87d | 453 | be32_to_cpu(hdr->offset), payload_length) : |
e48354ce NB |
454 | (dump) ? DATAOUT_WITHIN_COMMAND_RECOVERY : DATAOUT_NORMAL; |
455 | } | |
456 | ||
457 | static int iscsit_dataout_pre_datapduinorder_no( | |
458 | struct iscsi_cmd *cmd, | |
459 | unsigned char *buf) | |
460 | { | |
461 | struct iscsi_pdu *pdu; | |
462 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
463 | u32 payload_length = ntoh24(hdr->dlength); | |
464 | ||
50e5c87d CH |
465 | pdu = iscsit_get_pdu_holder(cmd, be32_to_cpu(hdr->offset), |
466 | payload_length); | |
e48354ce NB |
467 | if (!pdu) |
468 | return DATAOUT_CANNOT_RECOVER; | |
469 | ||
470 | cmd->pdu_ptr = pdu; | |
471 | ||
472 | switch (pdu->status) { | |
473 | case ISCSI_PDU_NOT_RECEIVED: | |
474 | case ISCSI_PDU_CRC_FAILED: | |
475 | case ISCSI_PDU_TIMED_OUT: | |
476 | break; | |
477 | case ISCSI_PDU_RECEIVED_OK: | |
478 | pr_err("Command ITT: 0x%08x received already gotten" | |
479 | " Offset: %u, Length: %u\n", cmd->init_task_tag, | |
50e5c87d | 480 | be32_to_cpu(hdr->offset), payload_length); |
e48354ce NB |
481 | return iscsit_dump_data_payload(cmd->conn, payload_length, 1); |
482 | default: | |
483 | return DATAOUT_CANNOT_RECOVER; | |
484 | } | |
485 | ||
486 | return DATAOUT_NORMAL; | |
487 | } | |
488 | ||
489 | static int iscsit_dataout_update_r2t(struct iscsi_cmd *cmd, u32 offset, u32 length) | |
490 | { | |
491 | struct iscsi_r2t *r2t; | |
492 | ||
493 | if (cmd->unsolicited_data) | |
494 | return 0; | |
495 | ||
496 | r2t = iscsit_get_r2t_for_eos(cmd, offset, length); | |
497 | if (!r2t) | |
498 | return -1; | |
499 | ||
500 | spin_lock_bh(&cmd->r2t_lock); | |
501 | r2t->seq_complete = 1; | |
502 | cmd->outstanding_r2ts--; | |
503 | spin_unlock_bh(&cmd->r2t_lock); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int iscsit_dataout_update_datapduinorder_no( | |
509 | struct iscsi_cmd *cmd, | |
510 | u32 data_sn, | |
511 | int f_bit) | |
512 | { | |
513 | int ret = 0; | |
514 | struct iscsi_pdu *pdu = cmd->pdu_ptr; | |
515 | ||
516 | pdu->data_sn = data_sn; | |
517 | ||
518 | switch (pdu->status) { | |
519 | case ISCSI_PDU_NOT_RECEIVED: | |
520 | pdu->status = ISCSI_PDU_RECEIVED_OK; | |
521 | break; | |
522 | case ISCSI_PDU_CRC_FAILED: | |
523 | pdu->status = ISCSI_PDU_RECEIVED_OK; | |
524 | break; | |
525 | case ISCSI_PDU_TIMED_OUT: | |
526 | pdu->status = ISCSI_PDU_RECEIVED_OK; | |
527 | break; | |
528 | default: | |
529 | return DATAOUT_CANNOT_RECOVER; | |
530 | } | |
531 | ||
532 | if (f_bit) { | |
533 | ret = iscsit_dataout_datapduinorder_no_fbit(cmd, pdu); | |
534 | if (ret == DATAOUT_CANNOT_RECOVER) | |
535 | return ret; | |
536 | } | |
537 | ||
538 | return DATAOUT_NORMAL; | |
539 | } | |
540 | ||
541 | static int iscsit_dataout_post_crc_passed( | |
542 | struct iscsi_cmd *cmd, | |
543 | unsigned char *buf) | |
544 | { | |
545 | int ret, send_r2t = 0; | |
546 | struct iscsi_conn *conn = cmd->conn; | |
547 | struct iscsi_seq *seq = NULL; | |
548 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
549 | u32 payload_length = ntoh24(hdr->dlength); | |
550 | ||
551 | if (cmd->unsolicited_data) { | |
552 | if ((cmd->first_burst_len + payload_length) == | |
553 | conn->sess->sess_ops->FirstBurstLength) { | |
50e5c87d | 554 | if (iscsit_dataout_update_r2t(cmd, be32_to_cpu(hdr->offset), |
e48354ce NB |
555 | payload_length) < 0) |
556 | return DATAOUT_CANNOT_RECOVER; | |
557 | send_r2t = 1; | |
558 | } | |
559 | ||
560 | if (!conn->sess->sess_ops->DataPDUInOrder) { | |
561 | ret = iscsit_dataout_update_datapduinorder_no(cmd, | |
50e5c87d CH |
562 | be32_to_cpu(hdr->datasn), |
563 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); | |
e48354ce NB |
564 | if (ret == DATAOUT_CANNOT_RECOVER) |
565 | return ret; | |
566 | } | |
567 | ||
568 | cmd->first_burst_len += payload_length; | |
569 | ||
570 | if (conn->sess->sess_ops->DataSequenceInOrder) | |
571 | cmd->data_sn++; | |
572 | else { | |
573 | seq = cmd->seq_ptr; | |
574 | seq->data_sn++; | |
575 | seq->offset += payload_length; | |
576 | } | |
577 | ||
578 | if (send_r2t) { | |
579 | if (seq) | |
580 | seq->status = DATAOUT_SEQUENCE_COMPLETE; | |
581 | cmd->first_burst_len = 0; | |
582 | cmd->unsolicited_data = 0; | |
583 | } | |
584 | } else { | |
585 | if (conn->sess->sess_ops->DataSequenceInOrder) { | |
586 | if ((cmd->next_burst_len + payload_length) == | |
587 | conn->sess->sess_ops->MaxBurstLength) { | |
50e5c87d CH |
588 | if (iscsit_dataout_update_r2t(cmd, |
589 | be32_to_cpu(hdr->offset), | |
e48354ce NB |
590 | payload_length) < 0) |
591 | return DATAOUT_CANNOT_RECOVER; | |
592 | send_r2t = 1; | |
593 | } | |
594 | ||
595 | if (!conn->sess->sess_ops->DataPDUInOrder) { | |
596 | ret = iscsit_dataout_update_datapduinorder_no( | |
50e5c87d | 597 | cmd, be32_to_cpu(hdr->datasn), |
e48354ce NB |
598 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); |
599 | if (ret == DATAOUT_CANNOT_RECOVER) | |
600 | return ret; | |
601 | } | |
602 | ||
603 | cmd->next_burst_len += payload_length; | |
604 | cmd->data_sn++; | |
605 | ||
606 | if (send_r2t) | |
607 | cmd->next_burst_len = 0; | |
608 | } else { | |
609 | seq = cmd->seq_ptr; | |
610 | ||
611 | if ((seq->next_burst_len + payload_length) == | |
612 | seq->xfer_len) { | |
50e5c87d CH |
613 | if (iscsit_dataout_update_r2t(cmd, |
614 | be32_to_cpu(hdr->offset), | |
e48354ce NB |
615 | payload_length) < 0) |
616 | return DATAOUT_CANNOT_RECOVER; | |
617 | send_r2t = 1; | |
618 | } | |
619 | ||
620 | if (!conn->sess->sess_ops->DataPDUInOrder) { | |
621 | ret = iscsit_dataout_update_datapduinorder_no( | |
50e5c87d | 622 | cmd, be32_to_cpu(hdr->datasn), |
e48354ce NB |
623 | (hdr->flags & ISCSI_FLAG_CMD_FINAL)); |
624 | if (ret == DATAOUT_CANNOT_RECOVER) | |
625 | return ret; | |
626 | } | |
627 | ||
628 | seq->data_sn++; | |
629 | seq->offset += payload_length; | |
630 | seq->next_burst_len += payload_length; | |
631 | ||
632 | if (send_r2t) { | |
633 | seq->next_burst_len = 0; | |
634 | seq->status = DATAOUT_SEQUENCE_COMPLETE; | |
635 | } | |
636 | } | |
637 | } | |
638 | ||
639 | if (send_r2t && conn->sess->sess_ops->DataSequenceInOrder) | |
640 | cmd->data_sn = 0; | |
641 | ||
642 | cmd->write_data_done += payload_length; | |
643 | ||
ebf1d95c | 644 | if (cmd->write_data_done == cmd->se_cmd.data_length) |
c6037cc5 AG |
645 | return DATAOUT_SEND_TO_TRANSPORT; |
646 | else if (send_r2t) | |
647 | return DATAOUT_SEND_R2T; | |
648 | else | |
649 | return DATAOUT_NORMAL; | |
e48354ce NB |
650 | } |
651 | ||
652 | static int iscsit_dataout_post_crc_failed( | |
653 | struct iscsi_cmd *cmd, | |
654 | unsigned char *buf) | |
655 | { | |
656 | struct iscsi_conn *conn = cmd->conn; | |
657 | struct iscsi_pdu *pdu; | |
658 | struct iscsi_data *hdr = (struct iscsi_data *) buf; | |
659 | u32 payload_length = ntoh24(hdr->dlength); | |
660 | ||
661 | if (conn->sess->sess_ops->DataPDUInOrder) | |
662 | goto recover; | |
663 | /* | |
664 | * The rest of this function is only called when DataPDUInOrder=No. | |
665 | */ | |
666 | pdu = cmd->pdu_ptr; | |
667 | ||
668 | switch (pdu->status) { | |
669 | case ISCSI_PDU_NOT_RECEIVED: | |
670 | pdu->status = ISCSI_PDU_CRC_FAILED; | |
671 | break; | |
672 | case ISCSI_PDU_CRC_FAILED: | |
673 | break; | |
674 | case ISCSI_PDU_TIMED_OUT: | |
675 | pdu->status = ISCSI_PDU_CRC_FAILED; | |
676 | break; | |
677 | default: | |
678 | return DATAOUT_CANNOT_RECOVER; | |
679 | } | |
680 | ||
681 | recover: | |
50e5c87d CH |
682 | return iscsit_recover_dataout_sequence(cmd, be32_to_cpu(hdr->offset), |
683 | payload_length); | |
e48354ce NB |
684 | } |
685 | ||
686 | /* | |
687 | * Called from iscsit_handle_data_out() before DataOUT Payload is received | |
688 | * and CRC computed. | |
689 | */ | |
fceb5bc7 | 690 | int iscsit_check_pre_dataout( |
e48354ce NB |
691 | struct iscsi_cmd *cmd, |
692 | unsigned char *buf) | |
693 | { | |
694 | int ret; | |
695 | struct iscsi_conn *conn = cmd->conn; | |
696 | ||
697 | ret = iscsit_dataout_within_command_recovery_check(cmd, buf); | |
698 | if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) || | |
699 | (ret == DATAOUT_CANNOT_RECOVER)) | |
700 | return ret; | |
701 | ||
702 | ret = iscsit_dataout_check_datasn(cmd, buf); | |
703 | if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) || | |
704 | (ret == DATAOUT_CANNOT_RECOVER)) | |
705 | return ret; | |
706 | ||
707 | if (cmd->unsolicited_data) { | |
708 | ret = iscsit_dataout_check_unsolicited_sequence(cmd, buf); | |
709 | if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) || | |
710 | (ret == DATAOUT_CANNOT_RECOVER)) | |
711 | return ret; | |
712 | } else { | |
713 | ret = iscsit_dataout_check_sequence(cmd, buf); | |
714 | if ((ret == DATAOUT_WITHIN_COMMAND_RECOVERY) || | |
715 | (ret == DATAOUT_CANNOT_RECOVER)) | |
716 | return ret; | |
717 | } | |
718 | ||
719 | return (conn->sess->sess_ops->DataPDUInOrder) ? | |
720 | iscsit_dataout_pre_datapduinorder_yes(cmd, buf) : | |
721 | iscsit_dataout_pre_datapduinorder_no(cmd, buf); | |
722 | } | |
723 | ||
724 | /* | |
725 | * Called from iscsit_handle_data_out() after DataOUT Payload is received | |
726 | * and CRC computed. | |
727 | */ | |
728 | int iscsit_check_post_dataout( | |
729 | struct iscsi_cmd *cmd, | |
730 | unsigned char *buf, | |
731 | u8 data_crc_failed) | |
732 | { | |
733 | struct iscsi_conn *conn = cmd->conn; | |
734 | ||
735 | cmd->dataout_timeout_retries = 0; | |
736 | ||
737 | if (!data_crc_failed) | |
738 | return iscsit_dataout_post_crc_passed(cmd, buf); | |
739 | else { | |
740 | if (!conn->sess->sess_ops->ErrorRecoveryLevel) { | |
741 | pr_err("Unable to recover from DataOUT CRC" | |
742 | " failure while ERL=0, closing session.\n"); | |
ba159914 NB |
743 | iscsit_reject_cmd(cmd, ISCSI_REASON_DATA_DIGEST_ERROR, |
744 | buf); | |
e48354ce NB |
745 | return DATAOUT_CANNOT_RECOVER; |
746 | } | |
747 | ||
ba159914 | 748 | iscsit_reject_cmd(cmd, ISCSI_REASON_DATA_DIGEST_ERROR, buf); |
e48354ce NB |
749 | return iscsit_dataout_post_crc_failed(cmd, buf); |
750 | } | |
751 | } | |
752 | ||
753 | static void iscsit_handle_time2retain_timeout(unsigned long data) | |
754 | { | |
755 | struct iscsi_session *sess = (struct iscsi_session *) data; | |
60bfcf8e | 756 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
757 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
758 | ||
759 | spin_lock_bh(&se_tpg->session_lock); | |
760 | if (sess->time2retain_timer_flags & ISCSI_TF_STOP) { | |
761 | spin_unlock_bh(&se_tpg->session_lock); | |
762 | return; | |
763 | } | |
764 | if (atomic_read(&sess->session_reinstatement)) { | |
765 | pr_err("Exiting Time2Retain handler because" | |
766 | " session_reinstatement=1\n"); | |
767 | spin_unlock_bh(&se_tpg->session_lock); | |
768 | return; | |
769 | } | |
770 | sess->time2retain_timer_flags |= ISCSI_TF_EXPIRED; | |
771 | ||
772 | pr_err("Time2Retain timer expired for SID: %u, cleaning up" | |
773 | " iSCSI session.\n", sess->sid); | |
774 | { | |
775 | struct iscsi_tiqn *tiqn = tpg->tpg_tiqn; | |
776 | ||
777 | if (tiqn) { | |
778 | spin_lock(&tiqn->sess_err_stats.lock); | |
779 | strcpy(tiqn->sess_err_stats.last_sess_fail_rem_name, | |
780 | (void *)sess->sess_ops->InitiatorName); | |
781 | tiqn->sess_err_stats.last_sess_failure_type = | |
782 | ISCSI_SESS_ERR_CXN_TIMEOUT; | |
783 | tiqn->sess_err_stats.cxn_timeout_errors++; | |
04f3b31b | 784 | atomic_long_inc(&sess->conn_timeout_errors); |
e48354ce NB |
785 | spin_unlock(&tiqn->sess_err_stats.lock); |
786 | } | |
787 | } | |
788 | ||
789 | spin_unlock_bh(&se_tpg->session_lock); | |
99367f01 | 790 | target_put_session(sess->se_sess); |
e48354ce NB |
791 | } |
792 | ||
fceb5bc7 | 793 | void iscsit_start_time2retain_handler(struct iscsi_session *sess) |
e48354ce NB |
794 | { |
795 | int tpg_active; | |
796 | /* | |
20879696 | 797 | * Only start Time2Retain timer when the associated TPG is still in |
e48354ce NB |
798 | * an ACTIVE (eg: not disabled or shutdown) state. |
799 | */ | |
60bfcf8e AG |
800 | spin_lock(&sess->tpg->tpg_state_lock); |
801 | tpg_active = (sess->tpg->tpg_state == TPG_STATE_ACTIVE); | |
802 | spin_unlock(&sess->tpg->tpg_state_lock); | |
e48354ce NB |
803 | |
804 | if (!tpg_active) | |
805 | return; | |
806 | ||
807 | if (sess->time2retain_timer_flags & ISCSI_TF_RUNNING) | |
808 | return; | |
809 | ||
810 | pr_debug("Starting Time2Retain timer for %u seconds on" | |
811 | " SID: %u\n", sess->sess_ops->DefaultTime2Retain, sess->sid); | |
812 | ||
813 | init_timer(&sess->time2retain_timer); | |
814 | sess->time2retain_timer.expires = | |
815 | (get_jiffies_64() + sess->sess_ops->DefaultTime2Retain * HZ); | |
816 | sess->time2retain_timer.data = (unsigned long)sess; | |
817 | sess->time2retain_timer.function = iscsit_handle_time2retain_timeout; | |
818 | sess->time2retain_timer_flags &= ~ISCSI_TF_STOP; | |
819 | sess->time2retain_timer_flags |= ISCSI_TF_RUNNING; | |
820 | add_timer(&sess->time2retain_timer); | |
821 | } | |
822 | ||
823 | /* | |
824 | * Called with spin_lock_bh(&struct se_portal_group->session_lock) held | |
825 | */ | |
fceb5bc7 | 826 | int iscsit_stop_time2retain_timer(struct iscsi_session *sess) |
e48354ce | 827 | { |
60bfcf8e | 828 | struct iscsi_portal_group *tpg = sess->tpg; |
e48354ce NB |
829 | struct se_portal_group *se_tpg = &tpg->tpg_se_tpg; |
830 | ||
831 | if (sess->time2retain_timer_flags & ISCSI_TF_EXPIRED) | |
832 | return -1; | |
833 | ||
834 | if (!(sess->time2retain_timer_flags & ISCSI_TF_RUNNING)) | |
835 | return 0; | |
836 | ||
837 | sess->time2retain_timer_flags |= ISCSI_TF_STOP; | |
574780fd | 838 | spin_unlock(&se_tpg->session_lock); |
e48354ce NB |
839 | |
840 | del_timer_sync(&sess->time2retain_timer); | |
841 | ||
574780fd | 842 | spin_lock(&se_tpg->session_lock); |
e48354ce NB |
843 | sess->time2retain_timer_flags &= ~ISCSI_TF_RUNNING; |
844 | pr_debug("Stopped Time2Retain Timer for SID: %u\n", | |
845 | sess->sid); | |
846 | return 0; | |
847 | } | |
848 | ||
849 | void iscsit_connection_reinstatement_rcfr(struct iscsi_conn *conn) | |
850 | { | |
851 | spin_lock_bh(&conn->state_lock); | |
852 | if (atomic_read(&conn->connection_exit)) { | |
853 | spin_unlock_bh(&conn->state_lock); | |
854 | goto sleep; | |
855 | } | |
856 | ||
857 | if (atomic_read(&conn->transport_failed)) { | |
858 | spin_unlock_bh(&conn->state_lock); | |
859 | goto sleep; | |
860 | } | |
861 | spin_unlock_bh(&conn->state_lock); | |
862 | ||
863 | iscsi_thread_set_force_reinstatement(conn); | |
864 | ||
865 | sleep: | |
866 | wait_for_completion(&conn->conn_wait_rcfr_comp); | |
867 | complete(&conn->conn_post_wait_comp); | |
868 | } | |
869 | ||
870 | void iscsit_cause_connection_reinstatement(struct iscsi_conn *conn, int sleep) | |
871 | { | |
872 | spin_lock_bh(&conn->state_lock); | |
873 | if (atomic_read(&conn->connection_exit)) { | |
874 | spin_unlock_bh(&conn->state_lock); | |
875 | return; | |
876 | } | |
877 | ||
878 | if (atomic_read(&conn->transport_failed)) { | |
879 | spin_unlock_bh(&conn->state_lock); | |
880 | return; | |
881 | } | |
882 | ||
883 | if (atomic_read(&conn->connection_reinstatement)) { | |
884 | spin_unlock_bh(&conn->state_lock); | |
885 | return; | |
886 | } | |
887 | ||
888 | if (iscsi_thread_set_force_reinstatement(conn) < 0) { | |
889 | spin_unlock_bh(&conn->state_lock); | |
890 | return; | |
891 | } | |
892 | ||
893 | atomic_set(&conn->connection_reinstatement, 1); | |
894 | if (!sleep) { | |
895 | spin_unlock_bh(&conn->state_lock); | |
896 | return; | |
897 | } | |
898 | ||
899 | atomic_set(&conn->sleep_on_conn_wait_comp, 1); | |
900 | spin_unlock_bh(&conn->state_lock); | |
901 | ||
902 | wait_for_completion(&conn->conn_wait_comp); | |
903 | complete(&conn->conn_post_wait_comp); | |
904 | } | |
b2cb9649 | 905 | EXPORT_SYMBOL(iscsit_cause_connection_reinstatement); |
e48354ce NB |
906 | |
907 | void iscsit_fall_back_to_erl0(struct iscsi_session *sess) | |
908 | { | |
909 | pr_debug("Falling back to ErrorRecoveryLevel=0 for SID:" | |
910 | " %u\n", sess->sid); | |
911 | ||
912 | atomic_set(&sess->session_fall_back_to_erl0, 1); | |
913 | } | |
914 | ||
915 | static void iscsit_handle_connection_cleanup(struct iscsi_conn *conn) | |
916 | { | |
917 | struct iscsi_session *sess = conn->sess; | |
918 | ||
919 | if ((sess->sess_ops->ErrorRecoveryLevel == 2) && | |
920 | !atomic_read(&sess->session_reinstatement) && | |
921 | !atomic_read(&sess->session_fall_back_to_erl0)) | |
922 | iscsit_connection_recovery_transport_reset(conn); | |
923 | else { | |
924 | pr_debug("Performing cleanup for failed iSCSI" | |
925 | " Connection ID: %hu from %s\n", conn->cid, | |
926 | sess->sess_ops->InitiatorName); | |
927 | iscsit_close_connection(conn); | |
928 | } | |
929 | } | |
930 | ||
fceb5bc7 | 931 | void iscsit_take_action_for_connection_exit(struct iscsi_conn *conn) |
e48354ce NB |
932 | { |
933 | spin_lock_bh(&conn->state_lock); | |
934 | if (atomic_read(&conn->connection_exit)) { | |
935 | spin_unlock_bh(&conn->state_lock); | |
936 | return; | |
937 | } | |
938 | atomic_set(&conn->connection_exit, 1); | |
939 | ||
940 | if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT) { | |
941 | spin_unlock_bh(&conn->state_lock); | |
2a03ee8c | 942 | iscsit_close_connection(conn); |
e48354ce NB |
943 | return; |
944 | } | |
945 | ||
946 | if (conn->conn_state == TARG_CONN_STATE_CLEANUP_WAIT) { | |
947 | spin_unlock_bh(&conn->state_lock); | |
948 | return; | |
949 | } | |
950 | ||
951 | pr_debug("Moving to TARG_CONN_STATE_CLEANUP_WAIT.\n"); | |
952 | conn->conn_state = TARG_CONN_STATE_CLEANUP_WAIT; | |
953 | spin_unlock_bh(&conn->state_lock); | |
954 | ||
955 | iscsit_handle_connection_cleanup(conn); | |
956 | } | |
957 | ||
958 | /* | |
959 | * This is the simple function that makes the magic of | |
960 | * sync and steering happen in the follow paradoxical order: | |
961 | * | |
962 | * 0) Receive conn->of_marker (bytes left until next OFMarker) | |
963 | * bytes into an offload buffer. When we pass the exact number | |
964 | * of bytes in conn->of_marker, iscsit_dump_data_payload() and hence | |
965 | * rx_data() will automatically receive the identical u32 marker | |
966 | * values and store it in conn->of_marker_offset; | |
967 | * 1) Now conn->of_marker_offset will contain the offset to the start | |
968 | * of the next iSCSI PDU. Dump these remaining bytes into another | |
969 | * offload buffer. | |
970 | * 2) We are done! | |
971 | * Next byte in the TCP stream will contain the next iSCSI PDU! | |
972 | * Cool Huh?! | |
973 | */ | |
974 | int iscsit_recover_from_unknown_opcode(struct iscsi_conn *conn) | |
975 | { | |
976 | /* | |
977 | * Make sure the remaining bytes to next maker is a sane value. | |
978 | */ | |
979 | if (conn->of_marker > (conn->conn_ops->OFMarkInt * 4)) { | |
980 | pr_err("Remaining bytes to OFMarker: %u exceeds" | |
981 | " OFMarkInt bytes: %u.\n", conn->of_marker, | |
982 | conn->conn_ops->OFMarkInt * 4); | |
983 | return -1; | |
984 | } | |
985 | ||
986 | pr_debug("Advancing %u bytes in TCP stream to get to the" | |
987 | " next OFMarker.\n", conn->of_marker); | |
988 | ||
989 | if (iscsit_dump_data_payload(conn, conn->of_marker, 0) < 0) | |
990 | return -1; | |
991 | ||
992 | /* | |
993 | * Make sure the offset marker we retrived is a valid value. | |
994 | */ | |
995 | if (conn->of_marker_offset > (ISCSI_HDR_LEN + (ISCSI_CRC_LEN * 2) + | |
996 | conn->conn_ops->MaxRecvDataSegmentLength)) { | |
997 | pr_err("OfMarker offset value: %u exceeds limit.\n", | |
998 | conn->of_marker_offset); | |
999 | return -1; | |
1000 | } | |
1001 | ||
1002 | pr_debug("Discarding %u bytes of TCP stream to get to the" | |
1003 | " next iSCSI Opcode.\n", conn->of_marker_offset); | |
1004 | ||
1005 | if (iscsit_dump_data_payload(conn, conn->of_marker_offset, 0) < 0) | |
1006 | return -1; | |
1007 | ||
1008 | return 0; | |
1009 | } |