Line data Source code
1 : /* SPDX-License-Identifier: BSD-3-Clause
2 : * Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
3 : * Copyright (C) 2016 Intel Corporation.
4 : * All rights reserved.
5 : */
6 :
7 : #include "spdk/stdinc.h"
8 :
9 : #include "spdk/base64.h"
10 : #include "spdk/crc32.h"
11 : #include "spdk/endian.h"
12 : #include "spdk/env.h"
13 : #include "spdk/likely.h"
14 : #include "spdk/trace.h"
15 : #include "spdk/sock.h"
16 : #include "spdk/string.h"
17 : #include "spdk/queue.h"
18 : #include "spdk/md5.h"
19 :
20 : #include "iscsi/iscsi.h"
21 : #include "iscsi/param.h"
22 : #include "iscsi/tgt_node.h"
23 : #include "iscsi/task.h"
24 : #include "iscsi/conn.h"
25 : #include "spdk/scsi.h"
26 : #include "spdk/bdev.h"
27 : #include "iscsi/portal_grp.h"
28 :
29 : #include "spdk/log.h"
30 :
31 : #include "spdk_internal/sgl.h"
32 :
33 : #define MAX_TMPBUF 1024
34 :
35 : struct spdk_iscsi_globals g_iscsi = {
36 : .mutex = PTHREAD_MUTEX_INITIALIZER,
37 : .portal_head = TAILQ_HEAD_INITIALIZER(g_iscsi.portal_head),
38 : .pg_head = TAILQ_HEAD_INITIALIZER(g_iscsi.pg_head),
39 : .ig_head = TAILQ_HEAD_INITIALIZER(g_iscsi.ig_head),
40 : .target_head = TAILQ_HEAD_INITIALIZER(g_iscsi.target_head),
41 : .auth_group_head = TAILQ_HEAD_INITIALIZER(g_iscsi.auth_group_head),
42 : .poll_group_head = TAILQ_HEAD_INITIALIZER(g_iscsi.poll_group_head),
43 : };
44 :
45 : #define MATCH_DIGEST_WORD(BUF, CRC32C) \
46 : ( ((((uint32_t) *((uint8_t *)(BUF)+0)) << 0) \
47 : | (((uint32_t) *((uint8_t *)(BUF)+1)) << 8) \
48 : | (((uint32_t) *((uint8_t *)(BUF)+2)) << 16) \
49 : | (((uint32_t) *((uint8_t *)(BUF)+3)) << 24)) \
50 : == (CRC32C))
51 :
52 : #ifndef SPDK_CONFIG_HAVE_ARC4RANDOM
53 : static void
54 0 : srandomdev(void)
55 : {
56 : unsigned long seed;
57 : time_t now;
58 : pid_t pid;
59 :
60 0 : pid = getpid();
61 0 : now = time(NULL);
62 0 : seed = pid ^ now;
63 0 : srandom(seed);
64 0 : }
65 :
66 : static int g_arc4random_initialized = 0;
67 :
68 : static uint32_t
69 0 : arc4random(void)
70 : {
71 : uint32_t r;
72 : uint32_t r1, r2;
73 :
74 0 : if (!g_arc4random_initialized) {
75 0 : srandomdev();
76 0 : g_arc4random_initialized = 1;
77 : }
78 0 : r1 = (uint32_t)(random() & 0xffff);
79 0 : r2 = (uint32_t)(random() & 0xffff);
80 0 : r = (r1 << 16) | r2;
81 0 : return r;
82 : }
83 : #endif /* SPDK_CONFIG_HAVE_ARC4RANDOM */
84 :
85 : static void
86 0 : gen_random(uint8_t *buf, size_t len)
87 : {
88 : uint32_t r;
89 : size_t idx;
90 :
91 0 : for (idx = 0; idx < len; idx++) {
92 0 : r = arc4random();
93 0 : buf[idx] = (uint8_t) r;
94 : }
95 0 : }
96 :
97 : static uint64_t
98 2 : iscsi_get_isid(const uint8_t isid[6])
99 : {
100 2 : return (uint64_t)isid[0] << 40 |
101 2 : (uint64_t)isid[1] << 32 |
102 2 : (uint64_t)isid[2] << 24 |
103 2 : (uint64_t)isid[3] << 16 |
104 4 : (uint64_t)isid[4] << 8 |
105 2 : (uint64_t)isid[5];
106 : }
107 :
108 : static int
109 0 : bin2hex(char *buf, size_t len, const uint8_t *data, size_t data_len)
110 : {
111 0 : const char *digits = "0123456789ABCDEF";
112 0 : size_t total = 0;
113 : size_t idx;
114 :
115 0 : if (len < 3) {
116 0 : return -1;
117 : }
118 0 : buf[total] = '0';
119 0 : total++;
120 0 : buf[total] = 'x';
121 0 : total++;
122 0 : buf[total] = '\0';
123 :
124 0 : for (idx = 0; idx < data_len; idx++) {
125 0 : if (total + 3 > len) {
126 0 : buf[total] = '\0';
127 0 : return - 1;
128 : }
129 0 : buf[total] = digits[(data[idx] >> 4) & 0x0fU];
130 0 : total++;
131 0 : buf[total] = digits[data[idx] & 0x0fU];
132 0 : total++;
133 : }
134 0 : buf[total] = '\0';
135 0 : return total;
136 : }
137 :
138 : static int
139 0 : hex2bin(uint8_t *data, size_t data_len, const char *str)
140 : {
141 0 : const char *digits = "0123456789ABCDEF";
142 : const char *dp;
143 : const char *p;
144 0 : size_t total = 0;
145 : int n0, n1;
146 :
147 0 : p = str;
148 0 : if (p[0] != '0' && (p[1] != 'x' && p[1] != 'X')) {
149 0 : return -1;
150 : }
151 0 : p += 2;
152 :
153 0 : while (p[0] != '\0' && p[1] != '\0') {
154 0 : if (total >= data_len) {
155 0 : return -1;
156 : }
157 0 : dp = strchr(digits, toupper((int) p[0]));
158 0 : if (dp == NULL) {
159 0 : return -1;
160 : }
161 0 : n0 = (int)(dp - digits);
162 0 : dp = strchr(digits, toupper((int) p[1]));
163 0 : if (dp == NULL) {
164 0 : return -1;
165 : }
166 0 : n1 = (int)(dp - digits);
167 :
168 0 : data[total] = (uint8_t)(((n0 & 0x0fU) << 4) | (n1 & 0x0fU));
169 0 : total++;
170 0 : p += 2;
171 : }
172 0 : return total;
173 : }
174 :
175 : static int
176 14 : iscsi_reject(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu,
177 : int reason)
178 : {
179 : struct spdk_iscsi_pdu *rsp_pdu;
180 : struct iscsi_bhs_reject *rsph;
181 : uint8_t *data;
182 : int total_ahs_len;
183 : int data_len;
184 : int alloc_len;
185 :
186 14 : pdu->is_rejected = true;
187 :
188 14 : total_ahs_len = pdu->bhs.total_ahs_len;
189 14 : data_len = 0;
190 14 : alloc_len = ISCSI_BHS_LEN + (4 * total_ahs_len);
191 :
192 14 : if (conn->header_digest) {
193 0 : alloc_len += ISCSI_DIGEST_LEN;
194 : }
195 :
196 14 : data = calloc(1, alloc_len);
197 14 : if (!data) {
198 0 : SPDK_ERRLOG("calloc() failed for data segment\n");
199 0 : return -ENOMEM;
200 : }
201 :
202 14 : SPDK_DEBUGLOG(iscsi, "Reject PDU reason=%d\n", reason);
203 :
204 14 : if (conn->sess != NULL) {
205 13 : SPDK_DEBUGLOG(iscsi,
206 : "StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n",
207 : conn->StatSN, conn->sess->ExpCmdSN,
208 : conn->sess->MaxCmdSN);
209 : } else {
210 1 : SPDK_DEBUGLOG(iscsi, "StatSN=%u\n", conn->StatSN);
211 : }
212 :
213 14 : memcpy(data, &pdu->bhs, ISCSI_BHS_LEN);
214 14 : data_len += ISCSI_BHS_LEN;
215 :
216 14 : if (total_ahs_len != 0) {
217 0 : total_ahs_len = spdk_min((4 * total_ahs_len), ISCSI_AHS_LEN);
218 0 : memcpy(data + data_len, pdu->ahs, total_ahs_len);
219 0 : data_len += total_ahs_len;
220 : }
221 :
222 14 : if (conn->header_digest) {
223 0 : memcpy(data + data_len, pdu->header_digest, ISCSI_DIGEST_LEN);
224 0 : data_len += ISCSI_DIGEST_LEN;
225 : }
226 :
227 14 : rsp_pdu = iscsi_get_pdu(conn);
228 14 : if (rsp_pdu == NULL) {
229 0 : free(data);
230 0 : return -ENOMEM;
231 : }
232 :
233 14 : rsph = (struct iscsi_bhs_reject *)&rsp_pdu->bhs;
234 14 : rsp_pdu->data = data;
235 14 : rsph->opcode = ISCSI_OP_REJECT;
236 14 : rsph->flags |= 0x80; /* bit 0 is default to 1 */
237 14 : rsph->reason = reason;
238 14 : DSET24(rsph->data_segment_len, data_len);
239 :
240 14 : rsph->ffffffff = 0xffffffffU;
241 14 : to_be32(&rsph->stat_sn, conn->StatSN);
242 14 : conn->StatSN++;
243 :
244 14 : if (conn->sess != NULL) {
245 13 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
246 13 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
247 : } else {
248 1 : to_be32(&rsph->exp_cmd_sn, 1);
249 1 : to_be32(&rsph->max_cmd_sn, 1);
250 : }
251 :
252 14 : SPDK_LOGDUMP(iscsi, "PDU", (void *)&rsp_pdu->bhs, ISCSI_BHS_LEN);
253 :
254 14 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_pdu_generic_complete, NULL);
255 :
256 14 : return 0;
257 : }
258 :
259 : uint32_t
260 0 : iscsi_pdu_calc_header_digest(struct spdk_iscsi_pdu *pdu)
261 : {
262 : uint32_t crc32c;
263 0 : uint32_t ahs_len_bytes = pdu->bhs.total_ahs_len * 4;
264 :
265 0 : crc32c = SPDK_CRC32C_INITIAL;
266 0 : crc32c = spdk_crc32c_update(&pdu->bhs, ISCSI_BHS_LEN, crc32c);
267 :
268 0 : if (ahs_len_bytes) {
269 0 : crc32c = spdk_crc32c_update(pdu->ahs, ahs_len_bytes, crc32c);
270 : }
271 :
272 : /* BHS and AHS are always 4-byte multiples in length, so no padding is necessary. */
273 :
274 : /* Finalize CRC by inverting all bits. */
275 0 : return crc32c ^ SPDK_CRC32C_XOR;
276 : }
277 :
278 : /* Calculate CRC for each partial data segment. */
279 : static void
280 1 : iscsi_pdu_calc_partial_data_digest(struct spdk_iscsi_pdu *pdu)
281 : {
282 1 : struct iovec iov;
283 : uint32_t num_blocks;
284 :
285 1 : if (spdk_likely(!pdu->dif_insert_or_strip)) {
286 1 : pdu->crc32c = spdk_crc32c_update(pdu->data,
287 1 : pdu->data_valid_bytes - pdu->data_offset,
288 : pdu->crc32c);
289 : } else {
290 0 : iov.iov_base = pdu->data;
291 0 : iov.iov_len = pdu->data_buf_len;
292 0 : num_blocks = pdu->data_buf_len / pdu->dif_ctx.block_size;
293 :
294 0 : spdk_dif_update_crc32c(&iov, 1, num_blocks, &pdu->crc32c, &pdu->dif_ctx);
295 : }
296 1 : }
297 :
298 : static uint32_t
299 1 : iscsi_pdu_calc_partial_data_digest_done(struct spdk_iscsi_pdu *pdu)
300 : {
301 1 : uint32_t crc32c = pdu->crc32c;
302 : uint32_t mod;
303 :
304 : /* Include padding bytes into CRC if any. */
305 1 : mod = pdu->data_valid_bytes % ISCSI_ALIGNMENT;
306 1 : if (mod != 0) {
307 0 : uint32_t pad_length = ISCSI_ALIGNMENT - mod;
308 0 : uint8_t pad[3] = {0, 0, 0};
309 :
310 0 : assert(pad_length > 0);
311 0 : assert(pad_length <= sizeof(pad));
312 0 : crc32c = spdk_crc32c_update(pad, pad_length, crc32c);
313 : }
314 :
315 : /* Finalize CRC by inverting all bits. */
316 1 : return crc32c ^ SPDK_CRC32C_XOR;
317 : }
318 :
319 : uint32_t
320 0 : iscsi_pdu_calc_data_digest(struct spdk_iscsi_pdu *pdu)
321 : {
322 0 : uint32_t data_len = DGET24(pdu->bhs.data_segment_len);
323 0 : uint32_t crc32c;
324 : uint32_t mod;
325 0 : struct iovec iov;
326 : uint32_t num_blocks;
327 :
328 : /* Initialize CRC. */
329 0 : crc32c = SPDK_CRC32C_INITIAL;
330 :
331 : /* Calculate CRC for the whole data segment. */
332 0 : if (spdk_likely(!pdu->dif_insert_or_strip)) {
333 0 : crc32c = spdk_crc32c_update(pdu->data, data_len, crc32c);
334 : } else {
335 0 : iov.iov_base = pdu->data;
336 0 : iov.iov_len = pdu->data_buf_len;
337 0 : num_blocks = pdu->data_buf_len / pdu->dif_ctx.block_size;
338 :
339 0 : spdk_dif_update_crc32c(&iov, 1, num_blocks, &crc32c, &pdu->dif_ctx);
340 : }
341 :
342 : /* Include padding bytes into CRC if any. */
343 0 : mod = data_len % ISCSI_ALIGNMENT;
344 0 : if (mod != 0) {
345 0 : uint32_t pad_length = ISCSI_ALIGNMENT - mod;
346 0 : uint8_t pad[3] = {0, 0, 0};
347 0 : assert(pad_length > 0);
348 0 : assert(pad_length <= sizeof(pad));
349 0 : crc32c = spdk_crc32c_update(pad, pad_length, crc32c);
350 : }
351 :
352 : /* Finalize CRC by inverting all bits. */
353 0 : return crc32c ^ SPDK_CRC32C_XOR;
354 : }
355 :
356 : static int
357 17 : iscsi_conn_read_data_segment(struct spdk_iscsi_conn *conn,
358 : struct spdk_iscsi_pdu *pdu,
359 : uint32_t data_offset, uint32_t data_len)
360 : {
361 17 : struct iovec buf_iov, iovs[32];
362 : int rc, _rc;
363 :
364 17 : if (spdk_likely(!pdu->dif_insert_or_strip)) {
365 17 : return iscsi_conn_read_data(conn, data_len, pdu->data + data_offset);
366 : } else {
367 0 : buf_iov.iov_base = pdu->data;
368 0 : buf_iov.iov_len = pdu->data_buf_len;
369 0 : rc = spdk_dif_set_md_interleave_iovs(iovs, 32, &buf_iov, 1,
370 : data_offset, data_len, NULL,
371 0 : &pdu->dif_ctx);
372 0 : if (rc > 0) {
373 0 : rc = iscsi_conn_readv_data(conn, iovs, rc);
374 0 : if (rc > 0) {
375 0 : _rc = spdk_dif_generate_stream(&buf_iov, 1, data_offset, rc,
376 : &pdu->dif_ctx);
377 0 : if (_rc != 0) {
378 0 : SPDK_ERRLOG("DIF generate failed\n");
379 0 : rc = _rc;
380 : }
381 : }
382 : } else {
383 0 : SPDK_ERRLOG("Setup iovs for interleaved metadata failed\n");
384 : }
385 0 : return rc;
386 : }
387 : }
388 :
389 : /* Build iovec array to leave metadata space for every data block
390 : * when reading data segment from socket.
391 : */
392 : static inline bool
393 4 : _iscsi_sgl_append_with_md(struct spdk_iov_sgl *s,
394 : void *buf, uint32_t buf_len, uint32_t data_len,
395 : struct spdk_dif_ctx *dif_ctx)
396 : {
397 : int rc;
398 4 : uint32_t total_size = 0;
399 4 : struct iovec buf_iov;
400 :
401 4 : if (s->iov_offset >= data_len) {
402 1 : s->iov_offset -= data_len;
403 : } else {
404 3 : buf_iov.iov_base = buf;
405 3 : buf_iov.iov_len = buf_len;
406 3 : rc = spdk_dif_set_md_interleave_iovs(s->iov, s->iovcnt, &buf_iov, 1,
407 3 : s->iov_offset, data_len - s->iov_offset,
408 : &total_size, dif_ctx);
409 3 : if (rc < 0) {
410 0 : SPDK_ERRLOG("Failed to setup iovs for DIF strip\n");
411 0 : return false;
412 : }
413 :
414 3 : s->total_size += total_size;
415 3 : s->iov_offset = 0;
416 3 : assert(s->iovcnt >= rc);
417 3 : s->iovcnt -= rc;
418 3 : s->iov += rc;
419 :
420 3 : if (s->iovcnt == 0) {
421 1 : return false;
422 : }
423 : }
424 :
425 3 : return true;
426 : }
427 :
428 : int
429 16 : iscsi_build_iovs(struct spdk_iscsi_conn *conn, struct iovec *iovs, int iovcnt,
430 : struct spdk_iscsi_pdu *pdu, uint32_t *_mapped_length)
431 : {
432 16 : struct spdk_iov_sgl sgl;
433 : int enable_digest;
434 : uint32_t total_ahs_len;
435 : uint32_t data_len;
436 :
437 16 : if (iovcnt == 0) {
438 0 : return 0;
439 : }
440 :
441 16 : total_ahs_len = pdu->bhs.total_ahs_len;
442 16 : data_len = DGET24(pdu->bhs.data_segment_len);
443 16 : data_len = ISCSI_ALIGN(data_len);
444 :
445 16 : enable_digest = 1;
446 16 : if (pdu->bhs.opcode == ISCSI_OP_LOGIN_RSP) {
447 : /* this PDU should be sent without digest */
448 0 : enable_digest = 0;
449 : }
450 :
451 16 : spdk_iov_sgl_init(&sgl, iovs, iovcnt, pdu->writev_offset);
452 :
453 : /* BHS */
454 16 : if (!spdk_iov_sgl_append(&sgl, (uint8_t *)&pdu->bhs, ISCSI_BHS_LEN)) {
455 1 : goto end;
456 : }
457 : /* AHS */
458 15 : if (total_ahs_len > 0) {
459 0 : if (!spdk_iov_sgl_append(&sgl, pdu->ahs, 4 * total_ahs_len)) {
460 0 : goto end;
461 : }
462 : }
463 :
464 : /* Header Digest */
465 15 : if (enable_digest && conn->header_digest) {
466 15 : if (!spdk_iov_sgl_append(&sgl, pdu->header_digest, ISCSI_DIGEST_LEN)) {
467 1 : goto end;
468 : }
469 : }
470 :
471 : /* Data Segment */
472 14 : if (data_len > 0) {
473 14 : if (!pdu->dif_insert_or_strip) {
474 10 : if (!spdk_iov_sgl_append(&sgl, pdu->data, data_len)) {
475 1 : goto end;
476 : }
477 : } else {
478 4 : if (!_iscsi_sgl_append_with_md(&sgl, pdu->data, pdu->data_buf_len,
479 : data_len, &pdu->dif_ctx)) {
480 1 : goto end;
481 : }
482 : }
483 : }
484 :
485 : /* Data Digest */
486 12 : if (enable_digest && conn->data_digest && data_len != 0) {
487 12 : spdk_iov_sgl_append(&sgl, pdu->data_digest, ISCSI_DIGEST_LEN);
488 : }
489 :
490 16 : end:
491 16 : if (_mapped_length != NULL) {
492 16 : *_mapped_length = sgl.total_size;
493 : }
494 :
495 16 : return iovcnt - sgl.iovcnt;
496 : }
497 :
498 : void
499 0 : iscsi_free_sess(struct spdk_iscsi_sess *sess)
500 : {
501 0 : if (sess == NULL) {
502 0 : return;
503 : }
504 :
505 0 : sess->tag = 0;
506 0 : sess->target = NULL;
507 0 : sess->session_type = SESSION_TYPE_INVALID;
508 0 : iscsi_param_free(sess->params);
509 0 : free(sess->conns);
510 0 : spdk_scsi_port_free(&sess->initiator_port);
511 0 : spdk_mempool_put(g_iscsi.session_pool, (void *)sess);
512 : }
513 :
514 : static int
515 0 : create_iscsi_sess(struct spdk_iscsi_conn *conn,
516 : struct spdk_iscsi_tgt_node *target,
517 : enum session_type session_type)
518 : {
519 : struct spdk_iscsi_sess *sess;
520 : int rc;
521 :
522 0 : sess = spdk_mempool_get(g_iscsi.session_pool);
523 0 : if (!sess) {
524 0 : SPDK_ERRLOG("Unable to get session object\n");
525 0 : SPDK_ERRLOG("MaxSessions set to %d\n", g_iscsi.MaxSessions);
526 0 : return -ENOMEM;
527 : }
528 :
529 : /* configuration values */
530 0 : pthread_mutex_lock(&g_iscsi.mutex);
531 :
532 0 : sess->MaxConnections = g_iscsi.MaxConnectionsPerSession;
533 0 : sess->MaxOutstandingR2T = DEFAULT_MAXOUTSTANDINGR2T;
534 :
535 0 : sess->DefaultTime2Wait = g_iscsi.DefaultTime2Wait;
536 0 : sess->DefaultTime2Retain = g_iscsi.DefaultTime2Retain;
537 0 : sess->FirstBurstLength = g_iscsi.FirstBurstLength;
538 0 : sess->MaxBurstLength = SPDK_ISCSI_MAX_BURST_LENGTH;
539 0 : sess->InitialR2T = DEFAULT_INITIALR2T;
540 0 : sess->ImmediateData = g_iscsi.ImmediateData;
541 0 : sess->DataPDUInOrder = DEFAULT_DATAPDUINORDER;
542 0 : sess->DataSequenceInOrder = DEFAULT_DATASEQUENCEINORDER;
543 0 : sess->ErrorRecoveryLevel = g_iscsi.ErrorRecoveryLevel;
544 :
545 0 : pthread_mutex_unlock(&g_iscsi.mutex);
546 :
547 0 : sess->tag = conn->pg_tag;
548 :
549 0 : sess->conns = calloc(sess->MaxConnections, sizeof(*sess->conns));
550 0 : if (!sess->conns) {
551 0 : spdk_mempool_put(g_iscsi.session_pool, (void *)sess);
552 0 : SPDK_ERRLOG("calloc() failed for connection array\n");
553 0 : return -ENOMEM;
554 : }
555 :
556 0 : sess->connections = 0;
557 :
558 0 : sess->conns[sess->connections] = conn;
559 0 : sess->connections++;
560 :
561 0 : sess->params = NULL;
562 0 : sess->target = target;
563 0 : sess->isid = 0;
564 0 : sess->session_type = session_type;
565 0 : sess->current_text_itt = 0xffffffffU;
566 :
567 : /* set default params */
568 0 : rc = iscsi_sess_params_init(&sess->params);
569 0 : if (rc < 0) {
570 0 : SPDK_ERRLOG("iscsi_sess_params_init() failed\n");
571 0 : goto error_return;
572 : }
573 : /* replace with config value */
574 0 : rc = iscsi_param_set_int(sess->params, "MaxConnections",
575 : sess->MaxConnections);
576 0 : if (rc < 0) {
577 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
578 0 : goto error_return;
579 : }
580 :
581 0 : rc = iscsi_param_set_int(sess->params, "MaxOutstandingR2T",
582 : sess->MaxOutstandingR2T);
583 0 : if (rc < 0) {
584 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
585 0 : goto error_return;
586 : }
587 :
588 0 : rc = iscsi_param_set_int(sess->params, "DefaultTime2Wait",
589 : sess->DefaultTime2Wait);
590 0 : if (rc < 0) {
591 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
592 0 : goto error_return;
593 : }
594 :
595 0 : rc = iscsi_param_set_int(sess->params, "DefaultTime2Retain",
596 : sess->DefaultTime2Retain);
597 0 : if (rc < 0) {
598 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
599 0 : goto error_return;
600 : }
601 :
602 0 : rc = iscsi_param_set_int(sess->params, "FirstBurstLength",
603 : sess->FirstBurstLength);
604 0 : if (rc < 0) {
605 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
606 0 : goto error_return;
607 : }
608 :
609 0 : rc = iscsi_param_set_int(sess->params, "MaxBurstLength",
610 : sess->MaxBurstLength);
611 0 : if (rc < 0) {
612 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
613 0 : goto error_return;
614 : }
615 :
616 0 : rc = iscsi_param_set(sess->params, "InitialR2T",
617 0 : sess->InitialR2T ? "Yes" : "No");
618 0 : if (rc < 0) {
619 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
620 0 : goto error_return;
621 : }
622 :
623 0 : rc = iscsi_param_set(sess->params, "ImmediateData",
624 0 : sess->ImmediateData ? "Yes" : "No");
625 0 : if (rc < 0) {
626 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
627 0 : goto error_return;
628 : }
629 :
630 0 : rc = iscsi_param_set(sess->params, "DataPDUInOrder",
631 0 : sess->DataPDUInOrder ? "Yes" : "No");
632 0 : if (rc < 0) {
633 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
634 0 : goto error_return;
635 : }
636 :
637 0 : rc = iscsi_param_set(sess->params, "DataSequenceInOrder",
638 0 : sess->DataSequenceInOrder ? "Yes" : "No");
639 0 : if (rc < 0) {
640 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
641 0 : goto error_return;
642 : }
643 :
644 0 : rc = iscsi_param_set_int(sess->params, "ErrorRecoveryLevel",
645 : sess->ErrorRecoveryLevel);
646 0 : if (rc < 0) {
647 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
648 0 : goto error_return;
649 : }
650 :
651 : /* realloc buffer */
652 0 : rc = iscsi_param_set_int(conn->params, "MaxRecvDataSegmentLength",
653 0 : conn->MaxRecvDataSegmentLength);
654 0 : if (rc < 0) {
655 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
656 0 : goto error_return;
657 : }
658 :
659 : /* sess for first connection of session */
660 0 : conn->sess = sess;
661 0 : return 0;
662 :
663 0 : error_return:
664 0 : iscsi_free_sess(sess);
665 0 : conn->sess = NULL;
666 0 : return -1;
667 : }
668 :
669 : static struct spdk_iscsi_sess *
670 2 : get_iscsi_sess_by_tsih(uint16_t tsih)
671 : {
672 : struct spdk_iscsi_sess *session;
673 :
674 2 : if (tsih == 0 || tsih > g_iscsi.MaxSessions) {
675 1 : return NULL;
676 : }
677 :
678 1 : session = g_iscsi.session[tsih - 1];
679 1 : assert(tsih == session->tsih);
680 :
681 1 : return session;
682 : }
683 :
684 : static uint8_t
685 2 : append_iscsi_sess(struct spdk_iscsi_conn *conn,
686 : const char *initiator_port_name, uint16_t tsih, uint16_t cid)
687 : {
688 : struct spdk_iscsi_sess *sess;
689 :
690 2 : SPDK_DEBUGLOG(iscsi, "append session: init port name=%s, tsih=%u, cid=%u\n",
691 : initiator_port_name, tsih, cid);
692 :
693 2 : sess = get_iscsi_sess_by_tsih(tsih);
694 2 : if (sess == NULL) {
695 1 : SPDK_ERRLOG("spdk_get_iscsi_sess_by_tsih failed\n");
696 1 : return ISCSI_LOGIN_CONN_ADD_FAIL;
697 : }
698 1 : if ((conn->pg_tag != sess->tag) ||
699 0 : (strcasecmp(initiator_port_name, spdk_scsi_port_get_name(sess->initiator_port)) != 0) ||
700 0 : (conn->target != sess->target)) {
701 : /* no match */
702 1 : SPDK_ERRLOG("no MCS session for init port name=%s, tsih=%d, cid=%d\n",
703 : initiator_port_name, tsih, cid);
704 1 : return ISCSI_LOGIN_CONN_ADD_FAIL;
705 : }
706 :
707 0 : if (sess->connections >= sess->MaxConnections) {
708 : /* no slot for connection */
709 0 : SPDK_ERRLOG("too many connections for init port name=%s, tsih=%d, cid=%d\n",
710 : initiator_port_name, tsih, cid);
711 0 : return ISCSI_LOGIN_TOO_MANY_CONNECTIONS;
712 : }
713 :
714 0 : SPDK_DEBUGLOG(iscsi, "Connections (tsih %d): %d\n", sess->tsih, sess->connections);
715 0 : conn->sess = sess;
716 :
717 : /*
718 : * TODO: need a mutex or other sync mechanism to protect the session's
719 : * connection list.
720 : */
721 0 : sess->conns[sess->connections] = conn;
722 0 : sess->connections++;
723 :
724 0 : return 0;
725 : }
726 :
727 : static int
728 0 : iscsi_append_text(const char *key, const char *val, uint8_t *data,
729 : int alloc_len, int data_len)
730 : {
731 : int total;
732 : int len;
733 :
734 0 : total = data_len;
735 0 : if (alloc_len < 1) {
736 0 : return 0;
737 : }
738 0 : if (total > alloc_len) {
739 0 : total = alloc_len;
740 0 : data[total - 1] = '\0';
741 0 : return total;
742 : }
743 :
744 0 : if (alloc_len - total < 1) {
745 0 : SPDK_ERRLOG("data space small %d\n", alloc_len);
746 0 : return total;
747 : }
748 0 : len = snprintf((char *) data + total, alloc_len - total, "%s=%s", key, val);
749 0 : total += len + 1;
750 :
751 0 : return total;
752 : }
753 :
754 : static int
755 0 : iscsi_append_param(struct spdk_iscsi_conn *conn, const char *key,
756 : uint8_t *data, int alloc_len, int data_len)
757 : {
758 : struct iscsi_param *param;
759 :
760 0 : param = iscsi_param_find(conn->params, key);
761 0 : if (param == NULL) {
762 0 : param = iscsi_param_find(conn->sess->params, key);
763 0 : if (param == NULL) {
764 0 : SPDK_DEBUGLOG(iscsi, "no key %.64s\n", key);
765 0 : return data_len;
766 : }
767 : }
768 0 : return iscsi_append_text(param->key, param->val, data,
769 : alloc_len, data_len);
770 : }
771 :
772 : static int
773 0 : iscsi_auth_params(struct spdk_iscsi_conn *conn,
774 : struct iscsi_param *params, const char *method, uint8_t *data,
775 : int alloc_len, int data_len)
776 : {
777 : char *in_val;
778 0 : char *in_next;
779 : char *new_val;
780 : const char *algorithm;
781 : const char *name;
782 : const char *response;
783 : const char *identifier;
784 : const char *challenge;
785 : int total;
786 : int rc;
787 :
788 0 : if (conn == NULL || params == NULL || method == NULL) {
789 0 : return -1;
790 : }
791 0 : if (strcasecmp(method, "CHAP") == 0) {
792 : /* method OK */
793 : } else {
794 0 : SPDK_ERRLOG("unsupported AuthMethod %.64s\n", method);
795 0 : return -1;
796 : }
797 :
798 0 : total = data_len;
799 0 : if (alloc_len < 1) {
800 0 : return 0;
801 : }
802 0 : if (total > alloc_len) {
803 0 : total = alloc_len;
804 0 : data[total - 1] = '\0';
805 0 : return total;
806 : }
807 :
808 : /* for temporary store */
809 0 : in_val = malloc(ISCSI_TEXT_MAX_VAL_LEN + 1);
810 0 : if (!in_val) {
811 0 : SPDK_ERRLOG("malloc() failed for temporary store\n");
812 0 : return -ENOMEM;
813 : }
814 :
815 : /* CHAP method (RFC1994) */
816 0 : if ((algorithm = iscsi_param_get_val(params, "CHAP_A")) != NULL) {
817 0 : if (conn->auth.chap_phase != ISCSI_CHAP_PHASE_WAIT_A) {
818 0 : SPDK_ERRLOG("CHAP sequence error\n");
819 0 : goto error_return;
820 : }
821 :
822 : /* CHAP_A is LIST type */
823 0 : snprintf(in_val, ISCSI_TEXT_MAX_VAL_LEN + 1, "%s", algorithm);
824 0 : in_next = in_val;
825 0 : while ((new_val = spdk_strsepq(&in_next, ",")) != NULL) {
826 0 : if (strcasecmp(new_val, "5") == 0) {
827 : /* CHAP with MD5 */
828 0 : break;
829 : }
830 : }
831 0 : if (new_val == NULL) {
832 0 : snprintf(in_val, ISCSI_TEXT_MAX_VAL_LEN + 1, "%s", "Reject");
833 0 : new_val = in_val;
834 0 : iscsi_append_text("CHAP_A", new_val, data, alloc_len, total);
835 0 : goto error_return;
836 : }
837 : /* selected algorithm is 5 (MD5) */
838 0 : SPDK_DEBUGLOG(iscsi, "got CHAP_A=%s\n", new_val);
839 0 : total = iscsi_append_text("CHAP_A", new_val, data, alloc_len, total);
840 :
841 : /* Identifier is one octet */
842 0 : gen_random(conn->auth.chap_id, 1);
843 0 : snprintf(in_val, ISCSI_TEXT_MAX_VAL_LEN, "%d",
844 0 : (int) conn->auth.chap_id[0]);
845 0 : total = iscsi_append_text("CHAP_I", in_val, data, alloc_len, total);
846 :
847 : /* Challenge Value is a variable stream of octets */
848 : /* (binary length MUST not exceed 1024 bytes) */
849 0 : conn->auth.chap_challenge_len = ISCSI_CHAP_CHALLENGE_LEN;
850 0 : gen_random(conn->auth.chap_challenge, conn->auth.chap_challenge_len);
851 0 : bin2hex(in_val, ISCSI_TEXT_MAX_VAL_LEN,
852 0 : conn->auth.chap_challenge, conn->auth.chap_challenge_len);
853 0 : total = iscsi_append_text("CHAP_C", in_val, data, alloc_len, total);
854 :
855 0 : conn->auth.chap_phase = ISCSI_CHAP_PHASE_WAIT_NR;
856 0 : } else if ((name = iscsi_param_get_val(params, "CHAP_N")) != NULL) {
857 0 : uint8_t resmd5[SPDK_MD5DIGEST_LEN];
858 0 : uint8_t tgtmd5[SPDK_MD5DIGEST_LEN];
859 0 : struct spdk_md5ctx md5ctx;
860 0 : size_t decoded_len = 0;
861 :
862 0 : if (conn->auth.chap_phase != ISCSI_CHAP_PHASE_WAIT_NR) {
863 0 : SPDK_ERRLOG("CHAP sequence error\n");
864 0 : goto error_return;
865 : }
866 :
867 0 : response = iscsi_param_get_val(params, "CHAP_R");
868 0 : if (response == NULL) {
869 0 : SPDK_ERRLOG("no response\n");
870 0 : goto error_return;
871 : }
872 0 : if (response[0] == '0' &&
873 0 : (response[1] == 'x' || response[1] == 'X')) {
874 0 : rc = hex2bin(resmd5, SPDK_MD5DIGEST_LEN, response);
875 0 : if (rc < 0 || rc != SPDK_MD5DIGEST_LEN) {
876 0 : SPDK_ERRLOG("response format error\n");
877 0 : goto error_return;
878 : }
879 0 : } else if (response[0] == '0' &&
880 0 : (response[1] == 'b' || response[1] == 'B')) {
881 0 : response += 2;
882 0 : rc = spdk_base64_decode(resmd5, &decoded_len, response);
883 0 : if (rc < 0 || decoded_len != SPDK_MD5DIGEST_LEN) {
884 0 : SPDK_ERRLOG("response format error\n");
885 0 : goto error_return;
886 : }
887 : } else {
888 0 : SPDK_ERRLOG("response format error\n");
889 0 : goto error_return;
890 : }
891 0 : SPDK_DEBUGLOG(iscsi, "got CHAP_N/CHAP_R\n");
892 :
893 0 : SPDK_DEBUGLOG(iscsi, "ag_tag=%d\n", conn->chap_group);
894 :
895 0 : rc = iscsi_chap_get_authinfo(&conn->auth, name, conn->chap_group);
896 0 : if (rc < 0) {
897 : /* SPDK_ERRLOG("auth user or secret is missing\n"); */
898 0 : SPDK_ERRLOG("iscsi_chap_get_authinfo() failed\n");
899 0 : goto error_return;
900 : }
901 0 : if (conn->auth.user[0] == '\0' || conn->auth.secret[0] == '\0') {
902 : /* SPDK_ERRLOG("auth user or secret is missing\n"); */
903 0 : SPDK_ERRLOG("auth failed (name %.64s)\n", name);
904 0 : goto error_return;
905 : }
906 :
907 0 : spdk_md5init(&md5ctx);
908 : /* Identifier */
909 0 : spdk_md5update(&md5ctx, conn->auth.chap_id, 1);
910 : /* followed by secret */
911 0 : spdk_md5update(&md5ctx, conn->auth.secret,
912 0 : strlen(conn->auth.secret));
913 : /* followed by Challenge Value */
914 0 : spdk_md5update(&md5ctx, conn->auth.chap_challenge,
915 0 : conn->auth.chap_challenge_len);
916 : /* tgtmd5 is expecting Response Value */
917 0 : spdk_md5final(tgtmd5, &md5ctx);
918 :
919 0 : bin2hex(in_val, ISCSI_TEXT_MAX_VAL_LEN, tgtmd5, SPDK_MD5DIGEST_LEN);
920 :
921 : #if 0
922 : SPDK_DEBUGLOG(iscsi, "tgtmd5=%s, resmd5=%s\n", in_val, response);
923 : spdk_dump("tgtmd5", tgtmd5, SPDK_MD5DIGEST_LEN);
924 : spdk_dump("resmd5", resmd5, SPDK_MD5DIGEST_LEN);
925 : #endif
926 :
927 : /* compare MD5 digest */
928 0 : if (memcmp(tgtmd5, resmd5, SPDK_MD5DIGEST_LEN) != 0) {
929 : /* not match */
930 : /* SPDK_ERRLOG("auth user or secret is missing\n"); */
931 0 : SPDK_ERRLOG("auth failed (name %.64s)\n", name);
932 0 : goto error_return;
933 : }
934 : /* OK initiator's secret */
935 0 : conn->authenticated = true;
936 :
937 : /* mutual CHAP? */
938 0 : identifier = iscsi_param_get_val(params, "CHAP_I");
939 0 : if (identifier != NULL) {
940 0 : conn->auth.chap_mid[0] = (uint8_t) strtol(identifier, NULL, 10);
941 0 : challenge = iscsi_param_get_val(params, "CHAP_C");
942 0 : if (challenge == NULL) {
943 0 : SPDK_ERRLOG("CHAP sequence error\n");
944 0 : goto error_return;
945 : }
946 0 : if (challenge[0] == '0' &&
947 0 : (challenge[1] == 'x' || challenge[1] == 'X')) {
948 0 : rc = hex2bin(conn->auth.chap_mchallenge,
949 : ISCSI_CHAP_CHALLENGE_LEN, challenge);
950 0 : if (rc < 0) {
951 0 : SPDK_ERRLOG("challenge format error\n");
952 0 : goto error_return;
953 : }
954 0 : conn->auth.chap_mchallenge_len = rc;
955 0 : } else if (challenge[0] == '0' &&
956 0 : (challenge[1] == 'b' || challenge[1] == 'B')) {
957 0 : challenge += 2;
958 0 : rc = spdk_base64_decode(conn->auth.chap_mchallenge,
959 : &decoded_len, challenge);
960 0 : if (rc < 0) {
961 0 : SPDK_ERRLOG("challenge format error\n");
962 0 : goto error_return;
963 : }
964 0 : conn->auth.chap_mchallenge_len = decoded_len;
965 : } else {
966 0 : SPDK_ERRLOG("challenge format error\n");
967 0 : goto error_return;
968 : }
969 : #if 0
970 : spdk_dump("MChallenge", conn->auth.chap_mchallenge,
971 : conn->auth.chap_mchallenge_len);
972 : #endif
973 0 : SPDK_DEBUGLOG(iscsi, "got CHAP_I/CHAP_C\n");
974 :
975 0 : if (conn->auth.muser[0] == '\0' || conn->auth.msecret[0] == '\0') {
976 : /* SPDK_ERRLOG("mutual auth user or secret is missing\n"); */
977 0 : SPDK_ERRLOG("auth failed (name %.64s)\n", name);
978 0 : goto error_return;
979 : }
980 :
981 0 : if (conn->mutual_chap == false) {
982 0 : SPDK_ERRLOG("Initiator wants to use mutual CHAP for security, but it's not enabled.\n");
983 0 : goto error_return;
984 : }
985 :
986 0 : spdk_md5init(&md5ctx);
987 : /* Identifier */
988 0 : spdk_md5update(&md5ctx, conn->auth.chap_mid, 1);
989 : /* followed by secret */
990 0 : spdk_md5update(&md5ctx, conn->auth.msecret,
991 0 : strlen(conn->auth.msecret));
992 : /* followed by Challenge Value */
993 0 : spdk_md5update(&md5ctx, conn->auth.chap_mchallenge,
994 0 : conn->auth.chap_mchallenge_len);
995 : /* tgtmd5 is Response Value */
996 0 : spdk_md5final(tgtmd5, &md5ctx);
997 :
998 0 : bin2hex(in_val, ISCSI_TEXT_MAX_VAL_LEN, tgtmd5, SPDK_MD5DIGEST_LEN);
999 :
1000 0 : total = iscsi_append_text("CHAP_N", conn->auth.muser, data,
1001 : alloc_len, total);
1002 0 : total = iscsi_append_text("CHAP_R", in_val, data, alloc_len, total);
1003 : } else {
1004 : /* not mutual */
1005 0 : if (conn->mutual_chap) {
1006 0 : SPDK_ERRLOG("required mutual CHAP\n");
1007 0 : goto error_return;
1008 : }
1009 : }
1010 :
1011 0 : conn->auth.chap_phase = ISCSI_CHAP_PHASE_END;
1012 : } else {
1013 : /* not found CHAP keys */
1014 0 : SPDK_DEBUGLOG(iscsi, "start CHAP\n");
1015 0 : conn->auth.chap_phase = ISCSI_CHAP_PHASE_WAIT_A;
1016 : }
1017 :
1018 0 : free(in_val);
1019 0 : return total;
1020 :
1021 0 : error_return:
1022 0 : conn->auth.chap_phase = ISCSI_CHAP_PHASE_WAIT_A;
1023 0 : free(in_val);
1024 0 : return -1;
1025 : }
1026 :
1027 : static int
1028 0 : iscsi_check_values(struct spdk_iscsi_conn *conn)
1029 : {
1030 0 : if (conn->sess->FirstBurstLength > conn->sess->MaxBurstLength) {
1031 0 : SPDK_ERRLOG("FirstBurstLength(%d) > MaxBurstLength(%d)\n",
1032 : conn->sess->FirstBurstLength,
1033 : conn->sess->MaxBurstLength);
1034 0 : return -1;
1035 : }
1036 0 : if (conn->sess->FirstBurstLength > g_iscsi.FirstBurstLength) {
1037 0 : SPDK_ERRLOG("FirstBurstLength(%d) > iSCSI target restriction(%d)\n",
1038 : conn->sess->FirstBurstLength, g_iscsi.FirstBurstLength);
1039 0 : return -1;
1040 : }
1041 0 : if (conn->sess->MaxBurstLength > 0x00ffffff) {
1042 0 : SPDK_ERRLOG("MaxBurstLength(%d) > 0x00ffffff\n",
1043 : conn->sess->MaxBurstLength);
1044 0 : return -1;
1045 : }
1046 :
1047 0 : if (conn->MaxRecvDataSegmentLength < 512) {
1048 0 : SPDK_ERRLOG("MaxRecvDataSegmentLength(%d) < 512\n",
1049 : conn->MaxRecvDataSegmentLength);
1050 0 : return -1;
1051 : }
1052 0 : if (conn->MaxRecvDataSegmentLength > 0x00ffffff) {
1053 0 : SPDK_ERRLOG("MaxRecvDataSegmentLength(%d) > 0x00ffffff\n",
1054 : conn->MaxRecvDataSegmentLength);
1055 0 : return -1;
1056 : }
1057 0 : return 0;
1058 : }
1059 :
1060 : static int
1061 0 : iscsi_conn_params_update(struct spdk_iscsi_conn *conn)
1062 : {
1063 : int rc;
1064 : uint32_t recv_buf_size;
1065 :
1066 : /* update internal variables */
1067 0 : rc = iscsi_copy_param2var(conn);
1068 0 : if (rc < 0) {
1069 0 : SPDK_ERRLOG("iscsi_copy_param2var() failed\n");
1070 0 : if (conn->state < ISCSI_CONN_STATE_EXITING) {
1071 0 : conn->state = ISCSI_CONN_STATE_EXITING;
1072 : }
1073 0 : return rc;
1074 : }
1075 :
1076 : /* check value */
1077 0 : rc = iscsi_check_values(conn);
1078 0 : if (rc < 0) {
1079 0 : SPDK_ERRLOG("iscsi_check_values() failed\n");
1080 0 : if (conn->state < ISCSI_CONN_STATE_EXITING) {
1081 0 : conn->state = ISCSI_CONN_STATE_EXITING;
1082 : }
1083 : }
1084 :
1085 0 : if (conn->sock == NULL) {
1086 0 : SPDK_INFOLOG(iscsi, "socket is already closed.\n");
1087 0 : return -ENXIO;
1088 : }
1089 :
1090 : /* The socket receive buffer may need to be adjusted based on the new parameters */
1091 :
1092 : /* Don't allow the recv buffer to be 0 or very large. */
1093 0 : recv_buf_size = spdk_max(0x1000, spdk_min(0x2000, conn->sess->FirstBurstLength));
1094 :
1095 : /* Add in extra space for the PDU */
1096 0 : recv_buf_size += ISCSI_BHS_LEN + ISCSI_AHS_LEN;
1097 :
1098 0 : if (conn->header_digest) {
1099 0 : recv_buf_size += ISCSI_DIGEST_LEN;
1100 : }
1101 :
1102 0 : if (conn->data_digest) {
1103 0 : recv_buf_size += ISCSI_DIGEST_LEN;
1104 : }
1105 :
1106 : /* Set up to buffer up to 4 commands with immediate data at once */
1107 0 : if (spdk_sock_set_recvbuf(conn->sock, recv_buf_size * 4) < 0) {
1108 : /* Not fatal. */
1109 : }
1110 :
1111 0 : return rc;
1112 : }
1113 :
1114 : static void
1115 0 : iscsi_conn_login_pdu_err_complete(void *arg)
1116 : {
1117 0 : struct spdk_iscsi_conn *conn = arg;
1118 :
1119 0 : if (conn->full_feature) {
1120 0 : iscsi_conn_params_update(conn);
1121 : }
1122 0 : }
1123 :
1124 : static void
1125 0 : iscsi_conn_login_pdu_success_complete(void *arg)
1126 : {
1127 0 : struct spdk_iscsi_conn *conn = arg;
1128 :
1129 :
1130 0 : if (conn->state >= ISCSI_CONN_STATE_EXITING) {
1131 : /* Connection is being exited before this callback is executed. */
1132 0 : SPDK_DEBUGLOG(iscsi, "Connection is already exited.\n");
1133 0 : return;
1134 : }
1135 0 : if (conn->full_feature) {
1136 0 : if (iscsi_conn_params_update(conn) != 0) {
1137 0 : return;
1138 : }
1139 : }
1140 0 : if (conn->full_feature != 0) {
1141 0 : iscsi_conn_schedule(conn);
1142 : }
1143 : }
1144 :
1145 : /*
1146 : * The response function of spdk_iscsi_op_login
1147 : */
1148 : static void
1149 3 : iscsi_op_login_response(struct spdk_iscsi_conn *conn,
1150 : struct spdk_iscsi_pdu *rsp_pdu, struct iscsi_param *params,
1151 : iscsi_conn_xfer_complete_cb cb_fn)
1152 : {
1153 : struct iscsi_bhs_login_rsp *rsph;
1154 :
1155 3 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1156 3 : rsph->version_max = ISCSI_VERSION;
1157 3 : rsph->version_act = ISCSI_VERSION;
1158 3 : DSET24(rsph->data_segment_len, rsp_pdu->data_segment_len);
1159 :
1160 3 : to_be32(&rsph->stat_sn, conn->StatSN);
1161 3 : conn->StatSN++;
1162 :
1163 3 : if (conn->sess != NULL) {
1164 0 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
1165 0 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
1166 : } else {
1167 3 : to_be32(&rsph->exp_cmd_sn, rsp_pdu->cmd_sn);
1168 3 : to_be32(&rsph->max_cmd_sn, rsp_pdu->cmd_sn);
1169 : }
1170 :
1171 3 : SPDK_LOGDUMP(iscsi, "PDU", (uint8_t *)rsph, ISCSI_BHS_LEN);
1172 3 : SPDK_LOGDUMP(iscsi, "DATA", rsp_pdu->data, rsp_pdu->data_segment_len);
1173 :
1174 : /* Set T/CSG/NSG to reserved if login error. */
1175 3 : if (rsph->status_class != 0) {
1176 3 : rsph->flags &= ~(ISCSI_LOGIN_TRANSIT | ISCSI_LOGIN_CURRENT_STAGE_MASK |
1177 : ISCSI_LOGIN_NEXT_STAGE_MASK);
1178 : }
1179 3 : iscsi_param_free(params);
1180 3 : iscsi_conn_write_pdu(conn, rsp_pdu, cb_fn, conn);
1181 3 : }
1182 :
1183 : /*
1184 : * The function which is used to initialize the internal response data
1185 : * structure of iscsi login function.
1186 : * return:
1187 : * 0, success;
1188 : * otherwise, error;
1189 : */
1190 : static int
1191 4 : iscsi_op_login_rsp_init(struct spdk_iscsi_conn *conn,
1192 : struct spdk_iscsi_pdu *pdu, struct spdk_iscsi_pdu *rsp_pdu)
1193 : {
1194 : struct iscsi_bhs_login_req *reqh;
1195 : struct iscsi_bhs_login_rsp *rsph;
1196 :
1197 4 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1198 4 : rsph->opcode = ISCSI_OP_LOGIN_RSP;
1199 4 : rsph->status_class = ISCSI_CLASS_SUCCESS;
1200 4 : rsph->status_detail = ISCSI_LOGIN_ACCEPT;
1201 4 : rsp_pdu->data_segment_len = 0;
1202 :
1203 : /* The default MaxRecvDataSegmentLength 8192 is used during login. - RFC3720 */
1204 4 : rsp_pdu->data = calloc(1, 8192);
1205 4 : if (!rsp_pdu->data) {
1206 0 : SPDK_ERRLOG("calloc() failed for data segment\n");
1207 0 : rsph->status_class = ISCSI_CLASS_TARGET_ERROR;
1208 0 : rsph->status_detail = ISCSI_LOGIN_STATUS_NO_RESOURCES;
1209 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1210 : }
1211 4 : rsp_pdu->data_buf_len = 8192;
1212 :
1213 4 : reqh = (struct iscsi_bhs_login_req *)&pdu->bhs;
1214 4 : rsph->flags |= (reqh->flags & (ISCSI_LOGIN_TRANSIT | ISCSI_LOGIN_CONTINUE |
1215 : ISCSI_LOGIN_CURRENT_STAGE_MASK));
1216 4 : if (ISCSI_BHS_LOGIN_GET_TBIT(rsph->flags)) {
1217 2 : rsph->flags |= (reqh->flags & ISCSI_LOGIN_NEXT_STAGE_MASK);
1218 : }
1219 :
1220 : /* We don't need to convert from network byte order. Just store it */
1221 4 : memcpy(&rsph->isid, reqh->isid, 6);
1222 4 : rsph->tsih = reqh->tsih;
1223 4 : rsph->itt = reqh->itt;
1224 4 : rsp_pdu->cmd_sn = from_be32(&reqh->cmd_sn);
1225 :
1226 4 : if (rsph->tsih) {
1227 0 : rsph->stat_sn = reqh->exp_stat_sn;
1228 : }
1229 :
1230 4 : SPDK_LOGDUMP(iscsi, "PDU", (uint8_t *)&pdu->bhs, ISCSI_BHS_LEN);
1231 :
1232 4 : SPDK_DEBUGLOG(iscsi,
1233 : "T=%d, C=%d, CSG=%d, NSG=%d, Min=%d, Max=%d, ITT=%x\n",
1234 : ISCSI_BHS_LOGIN_GET_TBIT(rsph->flags),
1235 : ISCSI_BHS_LOGIN_GET_CBIT(rsph->flags),
1236 : ISCSI_BHS_LOGIN_GET_CSG(rsph->flags),
1237 : ISCSI_BHS_LOGIN_GET_NSG(rsph->flags),
1238 : reqh->version_min, reqh->version_max, from_be32(&rsph->itt));
1239 :
1240 4 : if (conn->sess != NULL) {
1241 0 : SPDK_DEBUGLOG(iscsi,
1242 : "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u,"
1243 : "MaxCmdSN=%u\n", rsp_pdu->cmd_sn,
1244 : from_be32(&rsph->stat_sn), conn->StatSN,
1245 : conn->sess->ExpCmdSN,
1246 : conn->sess->MaxCmdSN);
1247 : } else {
1248 4 : SPDK_DEBUGLOG(iscsi,
1249 : "CmdSN=%u, ExpStatSN=%u, StatSN=%u\n",
1250 : rsp_pdu->cmd_sn, from_be32(&rsph->stat_sn),
1251 : conn->StatSN);
1252 : }
1253 :
1254 4 : if (ISCSI_BHS_LOGIN_GET_TBIT(rsph->flags) &&
1255 2 : ISCSI_BHS_LOGIN_GET_CBIT(rsph->flags)) {
1256 1 : SPDK_ERRLOG("transit error\n");
1257 1 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1258 1 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
1259 1 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1260 : }
1261 : /* make sure reqh->version_max < ISCSI_VERSION */
1262 3 : if (reqh->version_min > ISCSI_VERSION) {
1263 1 : SPDK_ERRLOG("unsupported version min %d/max %d, expecting %d\n", reqh->version_min,
1264 : reqh->version_max, ISCSI_VERSION);
1265 : /* Unsupported version */
1266 : /* set all reserved flag to zero */
1267 1 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1268 1 : rsph->status_detail = ISCSI_LOGIN_UNSUPPORTED_VERSION;
1269 1 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1270 : }
1271 :
1272 2 : if ((ISCSI_BHS_LOGIN_GET_NSG(rsph->flags) == ISCSI_NSG_RESERVED_CODE) &&
1273 1 : ISCSI_BHS_LOGIN_GET_TBIT(rsph->flags)) {
1274 : /* set NSG and other bits to zero */
1275 1 : rsph->flags &= ~(ISCSI_LOGIN_NEXT_STAGE_MASK | ISCSI_LOGIN_TRANSIT |
1276 : ISCSI_LOGIN_CURRENT_STAGE_MASK);
1277 1 : SPDK_ERRLOG("Received reserved NSG code: %d\n", ISCSI_NSG_RESERVED_CODE);
1278 : /* Initiator error */
1279 1 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1280 1 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
1281 1 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1282 : }
1283 :
1284 1 : return 0;
1285 : }
1286 :
1287 : static int
1288 0 : iscsi_op_login_store_incoming_params(struct spdk_iscsi_conn *conn,
1289 : struct spdk_iscsi_pdu *pdu, struct spdk_iscsi_pdu *rsp_pdu,
1290 : struct iscsi_param **params)
1291 : {
1292 : struct iscsi_bhs_login_req *reqh;
1293 : struct iscsi_bhs_login_rsp *rsph;
1294 : int rc;
1295 :
1296 0 : reqh = (struct iscsi_bhs_login_req *)&pdu->bhs;
1297 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1298 :
1299 0 : rc = iscsi_parse_params(params, pdu->data,
1300 0 : pdu->data_segment_len, ISCSI_BHS_LOGIN_GET_CBIT(reqh->flags),
1301 : &conn->partial_text_parameter);
1302 0 : if (rc < 0) {
1303 0 : SPDK_ERRLOG("iscsi_parse_params() failed\n");
1304 0 : iscsi_param_free(*params);
1305 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1306 0 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
1307 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1308 : }
1309 :
1310 0 : return 0;
1311 : }
1312 :
1313 : /*
1314 : * This function is used to initialize the port info
1315 : * return
1316 : * 0: success
1317 : * otherwise: error
1318 : */
1319 : static int
1320 0 : iscsi_op_login_initialize_port(struct spdk_iscsi_conn *conn,
1321 : struct spdk_iscsi_pdu *rsp_pdu,
1322 : char *initiator_port_name,
1323 : uint32_t name_length,
1324 : struct iscsi_param *params)
1325 : {
1326 : const char *val;
1327 : struct iscsi_bhs_login_rsp *rsph;
1328 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1329 :
1330 : /* Initiator Name and Port */
1331 0 : val = iscsi_param_get_val(params, "InitiatorName");
1332 0 : if (val == NULL) {
1333 0 : SPDK_ERRLOG("InitiatorName is empty\n");
1334 : /* Missing parameter */
1335 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1336 0 : rsph->status_detail = ISCSI_LOGIN_MISSING_PARMS;
1337 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1338 : }
1339 0 : snprintf(conn->initiator_name, sizeof(conn->initiator_name), "%s", val);
1340 0 : snprintf(initiator_port_name, name_length,
1341 0 : "%s,i,0x%12.12" PRIx64, val, iscsi_get_isid(rsph->isid));
1342 0 : spdk_strlwr(conn->initiator_name);
1343 0 : spdk_strlwr(initiator_port_name);
1344 0 : SPDK_DEBUGLOG(iscsi, "Initiator name: %s\n", conn->initiator_name);
1345 0 : SPDK_DEBUGLOG(iscsi, "Initiator port: %s\n", initiator_port_name);
1346 :
1347 0 : return 0;
1348 : }
1349 :
1350 : /*
1351 : * This function is used to judge the session type
1352 : * return
1353 : * 0: success
1354 : * Other value: error
1355 : */
1356 : static int
1357 0 : iscsi_op_login_session_type(struct spdk_iscsi_conn *conn,
1358 : struct spdk_iscsi_pdu *rsp_pdu,
1359 : enum session_type *session_type,
1360 : struct iscsi_param *params)
1361 : {
1362 : const char *session_type_str;
1363 : struct iscsi_bhs_login_rsp *rsph;
1364 :
1365 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1366 0 : session_type_str = iscsi_param_get_val(params, "SessionType");
1367 0 : if (session_type_str == NULL) {
1368 0 : if (rsph->tsih != 0) {
1369 0 : *session_type = SESSION_TYPE_NORMAL;
1370 : } else {
1371 0 : SPDK_ERRLOG("SessionType is empty\n");
1372 : /* Missing parameter */
1373 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1374 0 : rsph->status_detail = ISCSI_LOGIN_MISSING_PARMS;
1375 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1376 : }
1377 : } else {
1378 0 : if (strcasecmp(session_type_str, "Discovery") == 0) {
1379 0 : *session_type = SESSION_TYPE_DISCOVERY;
1380 0 : } else if (strcasecmp(session_type_str, "Normal") == 0) {
1381 0 : *session_type = SESSION_TYPE_NORMAL;
1382 : } else {
1383 0 : *session_type = SESSION_TYPE_INVALID;
1384 0 : SPDK_ERRLOG("SessionType is invalid\n");
1385 : /* Missing parameter */
1386 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1387 0 : rsph->status_detail = ISCSI_LOGIN_MISSING_PARMS;
1388 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1389 : }
1390 : }
1391 0 : SPDK_DEBUGLOG(iscsi, "Session Type: %s\n", session_type_str);
1392 :
1393 0 : return 0;
1394 : }
1395 :
1396 : /*
1397 : * This function is used to check the target info
1398 : * return:
1399 : * 0: success
1400 : * otherwise: error
1401 : */
1402 : static int
1403 7 : iscsi_op_login_check_target(struct spdk_iscsi_conn *conn,
1404 : struct spdk_iscsi_pdu *rsp_pdu,
1405 : const char *target_name,
1406 : struct spdk_iscsi_tgt_node **target)
1407 : {
1408 : struct iscsi_bhs_login_rsp *rsph;
1409 7 : char buf[MAX_TMPBUF] = {};
1410 :
1411 7 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1412 7 : *target = iscsi_find_tgt_node(target_name);
1413 7 : if (*target == NULL) {
1414 1 : SPDK_WARNLOG("target %s not found\n", target_name);
1415 : /* Not found */
1416 1 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1417 1 : rsph->status_detail = ISCSI_LOGIN_TARGET_NOT_FOUND;
1418 1 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1419 : }
1420 6 : if (iscsi_tgt_node_is_destructed(*target)) {
1421 0 : SPDK_ERRLOG("target %s is removed\n", target_name);
1422 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1423 0 : rsph->status_detail = ISCSI_LOGIN_TARGET_REMOVED;
1424 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1425 : }
1426 6 : if (iscsi_tgt_node_is_redirected(conn, *target, buf, MAX_TMPBUF)) {
1427 0 : SPDK_INFOLOG(iscsi, "target %s is redirected\n", target_name);
1428 0 : rsp_pdu->data_segment_len = iscsi_append_text("TargetAddress",
1429 : buf,
1430 : rsp_pdu->data,
1431 0 : rsp_pdu->data_buf_len,
1432 0 : rsp_pdu->data_segment_len);
1433 0 : rsph->status_class = ISCSI_CLASS_REDIRECT;
1434 0 : rsph->status_detail = ISCSI_LOGIN_TARGET_TEMPORARILY_MOVED;
1435 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1436 : }
1437 6 : if (!iscsi_tgt_node_access(conn, *target, conn->initiator_name,
1438 6 : conn->initiator_addr)) {
1439 1 : SPDK_ERRLOG("access denied\n");
1440 1 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1441 1 : rsph->status_detail = ISCSI_LOGIN_AUTHORIZATION_FAIL;
1442 1 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1443 : }
1444 :
1445 5 : return 0;
1446 : }
1447 :
1448 : /*
1449 : * This function use to check the session
1450 : * return:
1451 : * 0, success
1452 : * otherwise: error
1453 : */
1454 : static int
1455 4 : iscsi_op_login_check_session(struct spdk_iscsi_conn *conn,
1456 : struct spdk_iscsi_pdu *rsp_pdu,
1457 : char *initiator_port_name, int cid)
1458 :
1459 : {
1460 4 : int rc = 0;
1461 : struct iscsi_bhs_login_rsp *rsph;
1462 :
1463 4 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1464 : /* check existing session */
1465 4 : SPDK_DEBUGLOG(iscsi, "isid=%"PRIx64", tsih=%u, cid=%u\n",
1466 : iscsi_get_isid(rsph->isid), from_be16(&rsph->tsih), cid);
1467 4 : if (rsph->tsih != 0) {
1468 : /* multiple connections */
1469 2 : rc = append_iscsi_sess(conn, initiator_port_name,
1470 2 : from_be16(&rsph->tsih), cid);
1471 2 : if (rc != 0) {
1472 2 : SPDK_ERRLOG("isid=%"PRIx64", tsih=%u, cid=%u:"
1473 : "spdk_append_iscsi_sess() failed\n",
1474 : iscsi_get_isid(rsph->isid), from_be16(&rsph->tsih),
1475 : cid);
1476 : /* Can't include in session */
1477 2 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1478 2 : rsph->status_detail = rc;
1479 2 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1480 : }
1481 2 : } else if (!g_iscsi.AllowDuplicateIsid) {
1482 : /* new session, drop old sess by the initiator */
1483 1 : iscsi_drop_conns(conn, initiator_port_name, 0 /* drop old */);
1484 : }
1485 :
1486 2 : return rc;
1487 : }
1488 :
1489 : /*
1490 : * This function is used to del the original param and update it with new
1491 : * value
1492 : * return:
1493 : * 0: success
1494 : * otherwise: error
1495 : */
1496 : static int
1497 0 : iscsi_op_login_update_param(struct spdk_iscsi_conn *conn,
1498 : const char *key, const char *value,
1499 : const char *list)
1500 : {
1501 0 : int rc = 0;
1502 : struct iscsi_param *new_param, *orig_param;
1503 : int index;
1504 :
1505 0 : orig_param = iscsi_param_find(conn->params, key);
1506 0 : if (orig_param == NULL) {
1507 0 : SPDK_ERRLOG("orig_param %s not found\n", key);
1508 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1509 : }
1510 :
1511 0 : index = orig_param->state_index;
1512 0 : rc = iscsi_param_del(&conn->params, key);
1513 0 : if (rc < 0) {
1514 0 : SPDK_ERRLOG("iscsi_param_del(%s) failed\n", key);
1515 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1516 : }
1517 0 : rc = iscsi_param_add(&conn->params, key, value, list, ISPT_LIST);
1518 0 : if (rc < 0) {
1519 0 : SPDK_ERRLOG("iscsi_param_add() failed\n");
1520 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1521 : }
1522 0 : new_param = iscsi_param_find(conn->params, key);
1523 0 : if (new_param == NULL) {
1524 0 : SPDK_ERRLOG("iscsi_param_find() failed\n");
1525 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1526 : }
1527 0 : new_param->state_index = index;
1528 0 : return rc;
1529 : }
1530 :
1531 : static int
1532 2 : iscsi_negotiate_chap_param(struct spdk_iscsi_conn *conn)
1533 : {
1534 2 : int rc = 0;
1535 :
1536 2 : if (conn->disable_chap) {
1537 0 : rc = iscsi_op_login_update_param(conn, "AuthMethod", "None", "None");
1538 2 : } else if (conn->require_chap) {
1539 0 : rc = iscsi_op_login_update_param(conn, "AuthMethod", "CHAP", "CHAP");
1540 : }
1541 :
1542 2 : return rc;
1543 : }
1544 :
1545 : /*
1546 : * The function which is used to handle the part of session discovery
1547 : * return:
1548 : * 0, success;
1549 : * otherwise: error;
1550 : */
1551 : static int
1552 0 : iscsi_op_login_session_discovery_chap(struct spdk_iscsi_conn *conn)
1553 : {
1554 0 : conn->disable_chap = g_iscsi.disable_chap;
1555 0 : conn->require_chap = g_iscsi.require_chap;
1556 0 : conn->mutual_chap = g_iscsi.mutual_chap;
1557 0 : conn->chap_group = g_iscsi.chap_group;
1558 :
1559 0 : return iscsi_negotiate_chap_param(conn);
1560 : }
1561 :
1562 : /*
1563 : * This function is used to update the param related with chap
1564 : * return:
1565 : * 0: success
1566 : * otherwise: error
1567 : */
1568 : static int
1569 2 : iscsi_op_login_negotiate_chap_param(struct spdk_iscsi_conn *conn,
1570 : struct spdk_iscsi_tgt_node *target)
1571 : {
1572 2 : conn->disable_chap = target->disable_chap;
1573 2 : conn->require_chap = target->require_chap;
1574 2 : conn->mutual_chap = target->mutual_chap;
1575 2 : conn->chap_group = target->chap_group;
1576 :
1577 2 : return iscsi_negotiate_chap_param(conn);
1578 : }
1579 :
1580 : static int
1581 2 : iscsi_op_login_negotiate_digest_param(struct spdk_iscsi_conn *conn,
1582 : struct spdk_iscsi_tgt_node *target)
1583 : {
1584 : int rc;
1585 :
1586 2 : if (target->header_digest) {
1587 : /*
1588 : * User specified header digests, so update the list of
1589 : * HeaderDigest values to remove "None" so that only
1590 : * initiators who support CRC32C can connect.
1591 : */
1592 0 : rc = iscsi_op_login_update_param(conn, "HeaderDigest", "CRC32C", "CRC32C");
1593 0 : if (rc < 0) {
1594 0 : return rc;
1595 : }
1596 : }
1597 :
1598 2 : if (target->data_digest) {
1599 : /*
1600 : * User specified data digests, so update the list of
1601 : * DataDigest values to remove "None" so that only
1602 : * initiators who support CRC32C can connect.
1603 : */
1604 0 : rc = iscsi_op_login_update_param(conn, "DataDigest", "CRC32C", "CRC32C");
1605 0 : if (rc < 0) {
1606 0 : return rc;
1607 : }
1608 : }
1609 :
1610 2 : return 0;
1611 : }
1612 :
1613 : /*
1614 : * The function which is used to handle the part of normal login session
1615 : * return:
1616 : * 0, success;
1617 : * SPDK_ISCSI_LOGIN_ERROR_PARAMETER, parameter error;
1618 : */
1619 : static int
1620 7 : iscsi_op_login_session_normal(struct spdk_iscsi_conn *conn,
1621 : struct spdk_iscsi_pdu *rsp_pdu,
1622 : char *initiator_port_name,
1623 : struct iscsi_param *params,
1624 : int cid)
1625 : {
1626 7 : struct spdk_iscsi_tgt_node *target = NULL;
1627 : const char *target_name;
1628 : const char *target_short_name;
1629 : struct iscsi_bhs_login_rsp *rsph;
1630 7 : int rc = 0;
1631 :
1632 7 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1633 7 : target_name = iscsi_param_get_val(params, "TargetName");
1634 :
1635 7 : if (target_name == NULL) {
1636 3 : SPDK_ERRLOG("TargetName is empty\n");
1637 : /* Missing parameter */
1638 3 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1639 3 : rsph->status_detail = ISCSI_LOGIN_MISSING_PARMS;
1640 3 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1641 : }
1642 :
1643 4 : memset(conn->target_short_name, 0, MAX_TARGET_NAME);
1644 4 : target_short_name = strstr(target_name, ":");
1645 4 : if (target_short_name != NULL) {
1646 4 : target_short_name++; /* Advance past the ':' */
1647 4 : if (strlen(target_short_name) >= MAX_TARGET_NAME) {
1648 0 : SPDK_ERRLOG("Target Short Name (%s) is more than %u characters\n",
1649 : target_short_name, MAX_TARGET_NAME);
1650 : /* Invalid request */
1651 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1652 0 : rsph->status_detail = ISCSI_LOGIN_INVALID_LOGIN_REQUEST;
1653 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1654 : }
1655 4 : snprintf(conn->target_short_name, MAX_TARGET_NAME, "%s",
1656 : target_short_name);
1657 : } else {
1658 0 : snprintf(conn->target_short_name, MAX_TARGET_NAME, "%s", target_name);
1659 : }
1660 :
1661 4 : pthread_mutex_lock(&g_iscsi.mutex);
1662 4 : rc = iscsi_op_login_check_target(conn, rsp_pdu, target_name, &target);
1663 4 : pthread_mutex_unlock(&g_iscsi.mutex);
1664 :
1665 4 : if (rc < 0) {
1666 0 : return rc;
1667 : }
1668 :
1669 4 : conn->target = target;
1670 4 : conn->dev = target->dev;
1671 8 : conn->target_port = spdk_scsi_dev_find_port_by_id(target->dev,
1672 4 : conn->pg_tag);
1673 :
1674 4 : rc = iscsi_op_login_check_session(conn, rsp_pdu,
1675 : initiator_port_name, cid);
1676 4 : if (rc < 0) {
1677 2 : return rc;
1678 : }
1679 :
1680 : /* force target flags */
1681 2 : pthread_mutex_lock(&target->mutex);
1682 2 : rc = iscsi_op_login_negotiate_chap_param(conn, target);
1683 2 : pthread_mutex_unlock(&target->mutex);
1684 :
1685 2 : if (rc == 0) {
1686 2 : rc = iscsi_op_login_negotiate_digest_param(conn, target);
1687 : }
1688 :
1689 2 : if (rc != 0) {
1690 : /* Invalid request */
1691 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1692 0 : rsph->status_detail = ISCSI_LOGIN_INVALID_LOGIN_REQUEST;
1693 : }
1694 :
1695 2 : return rc;
1696 : }
1697 :
1698 : /*
1699 : * This function is used to set the info in the connection data structure
1700 : * return
1701 : * 0: success
1702 : * otherwise: error
1703 : */
1704 : static int
1705 0 : iscsi_op_login_set_conn_info(struct spdk_iscsi_conn *conn,
1706 : struct spdk_iscsi_pdu *rsp_pdu,
1707 : char *initiator_port_name,
1708 : enum session_type session_type, int cid)
1709 : {
1710 0 : int rc = 0;
1711 : struct spdk_iscsi_tgt_node *target;
1712 : struct iscsi_bhs_login_rsp *rsph;
1713 0 : struct spdk_scsi_port *initiator_port;
1714 :
1715 0 : target = conn->target;
1716 :
1717 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1718 0 : conn->authenticated = false;
1719 0 : conn->auth.chap_phase = ISCSI_CHAP_PHASE_WAIT_A;
1720 0 : conn->cid = cid;
1721 :
1722 0 : if (conn->sess == NULL) {
1723 : /* create initiator port */
1724 0 : initiator_port = spdk_scsi_port_create(iscsi_get_isid(rsph->isid), 0, initiator_port_name);
1725 0 : if (initiator_port == NULL) {
1726 0 : SPDK_ERRLOG("create_port() failed\n");
1727 0 : rsph->status_class = ISCSI_CLASS_TARGET_ERROR;
1728 0 : rsph->status_detail = ISCSI_LOGIN_STATUS_NO_RESOURCES;
1729 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1730 : }
1731 :
1732 : /* new session */
1733 0 : rc = create_iscsi_sess(conn, target, session_type);
1734 0 : if (rc < 0) {
1735 0 : spdk_scsi_port_free(&initiator_port);
1736 0 : SPDK_ERRLOG("create_sess() failed\n");
1737 0 : rsph->status_class = ISCSI_CLASS_TARGET_ERROR;
1738 0 : rsph->status_detail = ISCSI_LOGIN_STATUS_NO_RESOURCES;
1739 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1740 : }
1741 : /* initialize parameters */
1742 0 : conn->sess->initiator_port = initiator_port;
1743 0 : conn->StatSN = from_be32(&rsph->stat_sn);
1744 0 : conn->sess->isid = iscsi_get_isid(rsph->isid);
1745 :
1746 : /* Initiator port TransportID */
1747 0 : spdk_scsi_port_set_iscsi_transport_id(conn->sess->initiator_port,
1748 0 : conn->initiator_name,
1749 0 : conn->sess->isid);
1750 :
1751 : /* Discovery sessions will not have a target. */
1752 0 : if (target != NULL) {
1753 0 : conn->sess->queue_depth = target->queue_depth;
1754 : } else {
1755 : /*
1756 : * Assume discovery sessions have an effective command
1757 : * windows size of 1.
1758 : */
1759 0 : conn->sess->queue_depth = 1;
1760 : }
1761 0 : conn->sess->ExpCmdSN = rsp_pdu->cmd_sn;
1762 0 : conn->sess->MaxCmdSN = rsp_pdu->cmd_sn + conn->sess->queue_depth - 1;
1763 : }
1764 :
1765 0 : conn->initiator_port = conn->sess->initiator_port;
1766 :
1767 0 : return 0;
1768 : }
1769 :
1770 : /*
1771 : * This function is used to set the target info
1772 : * return
1773 : * 0: success
1774 : * otherwise: error
1775 : */
1776 : static int
1777 0 : iscsi_op_login_set_target_info(struct spdk_iscsi_conn *conn,
1778 : struct spdk_iscsi_pdu *rsp_pdu,
1779 : enum session_type session_type)
1780 : {
1781 0 : char buf[MAX_TMPBUF];
1782 : const char *val;
1783 0 : int rc = 0;
1784 0 : struct spdk_iscsi_tgt_node *target = conn->target;
1785 :
1786 : /* declarative parameters */
1787 0 : if (target != NULL) {
1788 0 : pthread_mutex_lock(&target->mutex);
1789 0 : if (target->alias[0] != '\0') {
1790 0 : snprintf(buf, sizeof buf, "%s", target->alias);
1791 : } else {
1792 0 : snprintf(buf, sizeof buf, "%s", "");
1793 : }
1794 0 : pthread_mutex_unlock(&target->mutex);
1795 0 : rc = iscsi_param_set(conn->sess->params, "TargetAlias", buf);
1796 0 : if (rc < 0) {
1797 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
1798 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1799 : }
1800 : }
1801 0 : snprintf(buf, sizeof buf, "%s:%s,%d", conn->portal_host, conn->portal_port,
1802 : conn->pg_tag);
1803 0 : rc = iscsi_param_set(conn->sess->params, "TargetAddress", buf);
1804 0 : if (rc < 0) {
1805 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
1806 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1807 : }
1808 0 : snprintf(buf, sizeof buf, "%d", conn->pg_tag);
1809 0 : rc = iscsi_param_set(conn->sess->params, "TargetPortalGroupTag", buf);
1810 0 : if (rc < 0) {
1811 0 : SPDK_ERRLOG("iscsi_param_set() failed\n");
1812 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1813 : }
1814 :
1815 : /* write in response */
1816 0 : if (target != NULL) {
1817 0 : val = iscsi_param_get_val(conn->sess->params, "TargetAlias");
1818 0 : if (val != NULL && strlen(val) != 0) {
1819 0 : rsp_pdu->data_segment_len = iscsi_append_param(conn,
1820 : "TargetAlias",
1821 : rsp_pdu->data,
1822 0 : rsp_pdu->data_buf_len,
1823 0 : rsp_pdu->data_segment_len);
1824 : }
1825 0 : if (session_type == SESSION_TYPE_DISCOVERY) {
1826 0 : rsp_pdu->data_segment_len = iscsi_append_param(conn,
1827 : "TargetAddress",
1828 : rsp_pdu->data,
1829 0 : rsp_pdu->data_buf_len,
1830 0 : rsp_pdu->data_segment_len);
1831 : }
1832 0 : rsp_pdu->data_segment_len = iscsi_append_param(conn,
1833 : "TargetPortalGroupTag",
1834 : rsp_pdu->data,
1835 0 : rsp_pdu->data_buf_len,
1836 0 : rsp_pdu->data_segment_len);
1837 : }
1838 :
1839 0 : return rc;
1840 : }
1841 :
1842 : /*
1843 : * This function is used to handle the login of iscsi initiator when there is
1844 : * no session
1845 : * return:
1846 : * 0, success;
1847 : * SPDK_ISCSI_LOGIN_ERROR_PARAMETER, parameter error;
1848 : * SPDK_ISCSI_LOGIN_ERROR_RESPONSE, used to notify the login fail.
1849 : */
1850 : static int
1851 0 : iscsi_op_login_phase_none(struct spdk_iscsi_conn *conn,
1852 : struct spdk_iscsi_pdu *rsp_pdu,
1853 : struct iscsi_param *params, int cid)
1854 : {
1855 0 : enum session_type session_type;
1856 0 : char initiator_port_name[MAX_INITIATOR_PORT_NAME];
1857 : struct iscsi_bhs_login_rsp *rsph;
1858 0 : int rc = 0;
1859 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1860 :
1861 0 : conn->target = NULL;
1862 0 : conn->dev = NULL;
1863 :
1864 0 : rc = iscsi_op_login_initialize_port(conn, rsp_pdu, initiator_port_name,
1865 : MAX_INITIATOR_PORT_NAME, params);
1866 0 : if (rc < 0) {
1867 0 : return rc;
1868 : }
1869 :
1870 0 : rc = iscsi_op_login_session_type(conn, rsp_pdu, &session_type, params);
1871 0 : if (rc < 0) {
1872 0 : return rc;
1873 : }
1874 :
1875 : /* Target Name and Port */
1876 0 : if (session_type == SESSION_TYPE_NORMAL) {
1877 0 : rc = iscsi_op_login_session_normal(conn, rsp_pdu,
1878 : initiator_port_name,
1879 : params, cid);
1880 0 : if (rc < 0) {
1881 0 : return rc;
1882 : }
1883 :
1884 0 : } else if (session_type == SESSION_TYPE_DISCOVERY) {
1885 0 : rsph->tsih = 0;
1886 :
1887 : /* force target flags */
1888 0 : pthread_mutex_lock(&g_iscsi.mutex);
1889 0 : rc = iscsi_op_login_session_discovery_chap(conn);
1890 0 : pthread_mutex_unlock(&g_iscsi.mutex);
1891 0 : if (rc < 0) {
1892 0 : return rc;
1893 : }
1894 : } else {
1895 0 : SPDK_ERRLOG("unknown session type\n");
1896 : /* Missing parameter */
1897 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1898 0 : rsph->status_detail = ISCSI_LOGIN_MISSING_PARMS;
1899 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1900 : }
1901 :
1902 0 : rc = iscsi_op_login_set_conn_info(conn, rsp_pdu, initiator_port_name,
1903 : session_type, cid);
1904 0 : if (rc < 0) {
1905 0 : return rc;
1906 : }
1907 :
1908 : /* limit conns on discovery session */
1909 0 : if (session_type == SESSION_TYPE_DISCOVERY) {
1910 0 : conn->sess->MaxConnections = 1;
1911 0 : rc = iscsi_param_set_int(conn->sess->params,
1912 : "MaxConnections",
1913 0 : conn->sess->MaxConnections);
1914 0 : if (rc < 0) {
1915 0 : SPDK_ERRLOG("iscsi_param_set_int() failed\n");
1916 0 : return SPDK_ISCSI_LOGIN_ERROR_PARAMETER;
1917 : }
1918 : }
1919 :
1920 0 : return iscsi_op_login_set_target_info(conn, rsp_pdu, session_type);
1921 : }
1922 :
1923 : /*
1924 : * This function is used to set the csg bit case in rsp
1925 : * return:
1926 : * 0, success
1927 : * otherwise: error
1928 : */
1929 : static int
1930 0 : iscsi_op_login_rsp_handle_csg_bit(struct spdk_iscsi_conn *conn,
1931 : struct spdk_iscsi_pdu *rsp_pdu,
1932 : struct iscsi_param *params)
1933 : {
1934 : const char *auth_method;
1935 : int rc;
1936 : struct iscsi_bhs_login_rsp *rsph;
1937 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
1938 :
1939 0 : switch (ISCSI_BHS_LOGIN_GET_CSG(rsph->flags)) {
1940 0 : case ISCSI_SECURITY_NEGOTIATION_PHASE:
1941 : /* SecurityNegotiation */
1942 0 : auth_method = iscsi_param_get_val(conn->params, "AuthMethod");
1943 0 : if (auth_method == NULL) {
1944 0 : SPDK_ERRLOG("AuthMethod is empty\n");
1945 : /* Missing parameter */
1946 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1947 0 : rsph->status_detail = ISCSI_LOGIN_MISSING_PARMS;
1948 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1949 : }
1950 0 : if (strcasecmp(auth_method, "None") == 0) {
1951 0 : conn->authenticated = true;
1952 : } else {
1953 0 : rc = iscsi_auth_params(conn, params, auth_method,
1954 0 : rsp_pdu->data, rsp_pdu->data_buf_len,
1955 0 : rsp_pdu->data_segment_len);
1956 0 : if (rc < 0) {
1957 0 : SPDK_ERRLOG("iscsi_auth_params() failed\n");
1958 : /* Authentication failure */
1959 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1960 0 : rsph->status_detail = ISCSI_LOGIN_AUTHENT_FAIL;
1961 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1962 : }
1963 0 : rsp_pdu->data_segment_len = rc;
1964 0 : if (!conn->authenticated) {
1965 : /* not complete */
1966 0 : rsph->flags &= ~ISCSI_LOGIN_TRANSIT;
1967 : } else {
1968 0 : if (conn->auth.chap_phase != ISCSI_CHAP_PHASE_END) {
1969 0 : SPDK_DEBUGLOG(iscsi, "CHAP phase not complete");
1970 : }
1971 : }
1972 :
1973 0 : SPDK_LOGDUMP(iscsi, "Negotiated Auth Params",
1974 : rsp_pdu->data, rsp_pdu->data_segment_len);
1975 : }
1976 0 : break;
1977 :
1978 0 : case ISCSI_OPERATIONAL_NEGOTIATION_PHASE:
1979 : /* LoginOperationalNegotiation */
1980 0 : if (conn->state == ISCSI_CONN_STATE_INVALID) {
1981 0 : if (conn->require_chap) {
1982 : /* Authentication failure */
1983 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1984 0 : rsph->status_detail = ISCSI_LOGIN_AUTHENT_FAIL;
1985 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1986 : } else {
1987 : /* AuthMethod=None */
1988 0 : conn->authenticated = true;
1989 : }
1990 : }
1991 0 : if (!conn->authenticated) {
1992 0 : SPDK_ERRLOG("authentication error\n");
1993 : /* Authentication failure */
1994 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
1995 0 : rsph->status_detail = ISCSI_LOGIN_AUTHENT_FAIL;
1996 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
1997 : }
1998 0 : break;
1999 :
2000 0 : case ISCSI_FULL_FEATURE_PHASE:
2001 : /* FullFeaturePhase */
2002 0 : SPDK_ERRLOG("XXX Login in FullFeaturePhase\n");
2003 : /* Initiator error */
2004 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
2005 0 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
2006 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
2007 :
2008 0 : default:
2009 0 : SPDK_ERRLOG("unknown stage\n");
2010 : /* Initiator error */
2011 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
2012 0 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
2013 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
2014 : }
2015 :
2016 0 : return 0;
2017 : }
2018 :
2019 : /* This function is used to notify the session info
2020 : * return
2021 : * 0: success
2022 : * otherwise: error
2023 : */
2024 : static int
2025 0 : iscsi_op_login_notify_session_info(struct spdk_iscsi_conn *conn,
2026 : struct spdk_iscsi_pdu *rsp_pdu)
2027 : {
2028 : struct iscsi_bhs_login_rsp *rsph;
2029 :
2030 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
2031 0 : if (conn->sess->session_type == SESSION_TYPE_NORMAL) {
2032 : /* normal session */
2033 0 : SPDK_DEBUGLOG(iscsi, "Login from %s (%s) on %s tgt_node%d"
2034 : " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u,"
2035 : " CID=%u, HeaderDigest=%s, DataDigest=%s\n",
2036 : conn->initiator_name, conn->initiator_addr,
2037 : conn->target->name, conn->target->num,
2038 : conn->portal_host, conn->portal_port, conn->pg_tag,
2039 : conn->sess->isid, conn->sess->tsih, conn->cid,
2040 : (iscsi_param_eq_val(conn->params, "HeaderDigest", "CRC32C")
2041 : ? "on" : "off"),
2042 : (iscsi_param_eq_val(conn->params, "DataDigest", "CRC32C")
2043 : ? "on" : "off"));
2044 0 : } else if (conn->sess->session_type == SESSION_TYPE_DISCOVERY) {
2045 : /* discovery session */
2046 0 : SPDK_DEBUGLOG(iscsi, "Login(discovery) from %s (%s) on"
2047 : " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u,"
2048 : " CID=%u, HeaderDigest=%s, DataDigest=%s\n",
2049 : conn->initiator_name, conn->initiator_addr,
2050 : conn->portal_host, conn->portal_port, conn->pg_tag,
2051 : conn->sess->isid, conn->sess->tsih, conn->cid,
2052 : (iscsi_param_eq_val(conn->params, "HeaderDigest", "CRC32C")
2053 : ? "on" : "off"),
2054 : (iscsi_param_eq_val(conn->params, "DataDigest", "CRC32C")
2055 : ? "on" : "off"));
2056 : } else {
2057 0 : SPDK_ERRLOG("unknown session type\n");
2058 : /* Initiator error */
2059 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
2060 0 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
2061 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
2062 : }
2063 :
2064 0 : return 0;
2065 : }
2066 :
2067 : /*
2068 : * This function is to handle the tbit cases
2069 : * return
2070 : * 0: success
2071 : * otherwise error
2072 : */
2073 : static int
2074 0 : iscsi_op_login_rsp_handle_t_bit(struct spdk_iscsi_conn *conn,
2075 : struct spdk_iscsi_pdu *rsp_pdu)
2076 : {
2077 : int rc;
2078 : struct iscsi_bhs_login_rsp *rsph;
2079 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
2080 :
2081 0 : switch (ISCSI_BHS_LOGIN_GET_NSG(rsph->flags)) {
2082 0 : case ISCSI_SECURITY_NEGOTIATION_PHASE:
2083 : /* SecurityNegotiation */
2084 0 : conn->login_phase = ISCSI_SECURITY_NEGOTIATION_PHASE;
2085 0 : break;
2086 :
2087 0 : case ISCSI_OPERATIONAL_NEGOTIATION_PHASE:
2088 : /* LoginOperationalNegotiation */
2089 0 : conn->login_phase = ISCSI_OPERATIONAL_NEGOTIATION_PHASE;
2090 0 : break;
2091 :
2092 0 : case ISCSI_FULL_FEATURE_PHASE:
2093 : /* FullFeaturePhase */
2094 0 : conn->login_phase = ISCSI_FULL_FEATURE_PHASE;
2095 0 : to_be16(&rsph->tsih, conn->sess->tsih);
2096 :
2097 0 : rc = iscsi_op_login_notify_session_info(conn, rsp_pdu);
2098 0 : if (rc < 0) {
2099 0 : return rc;
2100 : }
2101 :
2102 0 : conn->full_feature = 1;
2103 0 : if (conn->sess->session_type == SESSION_TYPE_DISCOVERY) {
2104 0 : spdk_trace_owner_append_description(conn->trace_id, "discovery");
2105 : } else {
2106 0 : assert(conn->target != NULL);
2107 0 : spdk_trace_owner_append_description(conn->trace_id, conn->target->name);
2108 : }
2109 0 : break;
2110 :
2111 0 : default:
2112 0 : SPDK_ERRLOG("unknown stage\n");
2113 : /* Initiator error */
2114 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
2115 0 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
2116 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
2117 : }
2118 :
2119 0 : return 0;
2120 : }
2121 :
2122 : /*
2123 : * This function is used to set the values of the internal data structure used
2124 : * by spdk_iscsi_op_login function
2125 : * return:
2126 : * 0, used to notify the a successful login
2127 : * SPDK_ISCSI_LOGIN_ERROR_RESPONSE, used to notify a failure login.
2128 : */
2129 : static int
2130 0 : iscsi_op_login_rsp_handle(struct spdk_iscsi_conn *conn,
2131 : struct spdk_iscsi_pdu *rsp_pdu, struct iscsi_param **params)
2132 : {
2133 : int rc;
2134 : struct iscsi_bhs_login_rsp *rsph;
2135 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
2136 :
2137 : /* negotiate parameters */
2138 0 : rc = iscsi_negotiate_params(conn, params, rsp_pdu->data,
2139 0 : rsp_pdu->data_buf_len,
2140 0 : rsp_pdu->data_segment_len);
2141 0 : if (rc < 0) {
2142 : /*
2143 : * iscsi_negotiate_params just returns -1 on failure,
2144 : * so translate this into meaningful response codes and
2145 : * return values.
2146 : */
2147 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
2148 0 : rsph->status_detail = ISCSI_LOGIN_INITIATOR_ERROR;
2149 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
2150 : }
2151 :
2152 0 : rsp_pdu->data_segment_len = rc;
2153 0 : SPDK_LOGDUMP(iscsi, "Negotiated Params", rsp_pdu->data, rc);
2154 :
2155 : /* handle the CSG bit case */
2156 0 : rc = iscsi_op_login_rsp_handle_csg_bit(conn, rsp_pdu, *params);
2157 0 : if (rc < 0) {
2158 0 : return rc;
2159 : }
2160 :
2161 : /* handle the T bit case */
2162 0 : if (ISCSI_BHS_LOGIN_GET_TBIT(rsph->flags)) {
2163 0 : rc = iscsi_op_login_rsp_handle_t_bit(conn, rsp_pdu);
2164 : }
2165 :
2166 0 : return rc;
2167 : }
2168 :
2169 : static int
2170 7 : iscsi_pdu_hdr_op_login(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
2171 : {
2172 : int rc;
2173 : struct iscsi_bhs_login_req *reqh;
2174 : struct spdk_iscsi_pdu *rsp_pdu;
2175 :
2176 7 : if (conn->full_feature && conn->sess != NULL &&
2177 1 : conn->sess->session_type == SESSION_TYPE_DISCOVERY) {
2178 1 : return SPDK_ISCSI_CONNECTION_FATAL;
2179 : }
2180 :
2181 6 : reqh = (struct iscsi_bhs_login_req *)&pdu->bhs;
2182 6 : pdu->cmd_sn = from_be32(&reqh->cmd_sn);
2183 :
2184 : /* During login processing, use the 8KB default FirstBurstLength as
2185 : * our maximum data segment length value.
2186 : */
2187 6 : if (pdu->data_segment_len > SPDK_ISCSI_FIRST_BURST_LENGTH) {
2188 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
2189 : }
2190 :
2191 5 : rsp_pdu = iscsi_get_pdu(conn);
2192 5 : if (rsp_pdu == NULL) {
2193 1 : return SPDK_ISCSI_CONNECTION_FATAL;
2194 : }
2195 4 : rc = iscsi_op_login_rsp_init(conn, pdu, rsp_pdu);
2196 4 : if (rc < 0) {
2197 3 : iscsi_op_login_response(conn, rsp_pdu, NULL, iscsi_conn_login_pdu_err_complete);
2198 3 : return 0;
2199 : }
2200 :
2201 1 : conn->login_rsp_pdu = rsp_pdu;
2202 1 : return 0;
2203 : }
2204 :
2205 : static int
2206 0 : iscsi_pdu_payload_op_login(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
2207 : {
2208 : int rc;
2209 : struct iscsi_bhs_login_req *reqh;
2210 : struct spdk_iscsi_pdu *rsp_pdu;
2211 0 : struct iscsi_param *params = NULL;
2212 : int cid;
2213 :
2214 0 : if (conn->login_rsp_pdu == NULL) {
2215 0 : return 0;
2216 : }
2217 :
2218 0 : spdk_poller_unregister(&conn->login_timer);
2219 0 : rsp_pdu = conn->login_rsp_pdu;
2220 :
2221 0 : reqh = (struct iscsi_bhs_login_req *)&pdu->bhs;
2222 0 : cid = from_be16(&reqh->cid);
2223 :
2224 0 : rc = iscsi_op_login_store_incoming_params(conn, pdu, rsp_pdu, ¶ms);
2225 0 : if (rc < 0) {
2226 0 : iscsi_op_login_response(conn, rsp_pdu, NULL, iscsi_conn_login_pdu_err_complete);
2227 0 : return 0;
2228 : }
2229 :
2230 0 : if (conn->state == ISCSI_CONN_STATE_INVALID) {
2231 0 : rc = iscsi_op_login_phase_none(conn, rsp_pdu, params, cid);
2232 0 : if (rc == SPDK_ISCSI_LOGIN_ERROR_RESPONSE || rc == SPDK_ISCSI_LOGIN_ERROR_PARAMETER) {
2233 0 : iscsi_op_login_response(conn, rsp_pdu, params, iscsi_conn_login_pdu_err_complete);
2234 0 : return 0;
2235 : }
2236 : }
2237 :
2238 0 : rc = iscsi_op_login_rsp_handle(conn, rsp_pdu, ¶ms);
2239 0 : if (rc == SPDK_ISCSI_LOGIN_ERROR_RESPONSE) {
2240 0 : iscsi_op_login_response(conn, rsp_pdu, params, iscsi_conn_login_pdu_err_complete);
2241 0 : return 0;
2242 : }
2243 :
2244 0 : conn->state = ISCSI_CONN_STATE_RUNNING;
2245 0 : iscsi_op_login_response(conn, rsp_pdu, params, iscsi_conn_login_pdu_success_complete);
2246 0 : return 0;
2247 : }
2248 :
2249 : static int
2250 7 : iscsi_pdu_hdr_op_text(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
2251 : {
2252 : uint32_t task_tag;
2253 : uint32_t ExpStatSN;
2254 : int F_bit, C_bit;
2255 : struct iscsi_bhs_text_req *reqh;
2256 :
2257 7 : if (pdu->data_segment_len > iscsi_get_max_immediate_data_size()) {
2258 1 : SPDK_ERRLOG("data segment len(=%zu) > immediate data len(=%"PRIu32")\n",
2259 : pdu->data_segment_len, iscsi_get_max_immediate_data_size());
2260 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
2261 : }
2262 :
2263 6 : reqh = (struct iscsi_bhs_text_req *)&pdu->bhs;
2264 :
2265 6 : F_bit = !!(reqh->flags & ISCSI_FLAG_FINAL);
2266 6 : C_bit = !!(reqh->flags & ISCSI_TEXT_CONTINUE);
2267 6 : task_tag = from_be32(&reqh->itt);
2268 6 : ExpStatSN = from_be32(&reqh->exp_stat_sn);
2269 :
2270 6 : SPDK_DEBUGLOG(iscsi, "I=%d, F=%d, C=%d, ITT=%x, TTT=%x\n",
2271 : reqh->immediate, F_bit, C_bit, task_tag, from_be32(&reqh->ttt));
2272 :
2273 6 : SPDK_DEBUGLOG(iscsi,
2274 : "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n",
2275 : pdu->cmd_sn, ExpStatSN, conn->StatSN, conn->sess->ExpCmdSN,
2276 : conn->sess->MaxCmdSN);
2277 :
2278 6 : if (ExpStatSN != conn->StatSN) {
2279 : #if 0
2280 : SPDK_ERRLOG("StatSN(%u) error\n", ExpStatSN);
2281 : return -1;
2282 : #else
2283 : /* StarPort have a bug */
2284 3 : SPDK_DEBUGLOG(iscsi, "StatSN(%u) rewound\n", ExpStatSN);
2285 3 : conn->StatSN = ExpStatSN;
2286 : #endif
2287 : }
2288 :
2289 6 : if (F_bit && C_bit) {
2290 1 : SPDK_ERRLOG("final and continue\n");
2291 1 : return -1;
2292 : }
2293 :
2294 : /*
2295 : * If this is the first text op in a sequence, save the ITT so we can
2296 : * compare it against the ITT for subsequent ops in the same sequence.
2297 : * If a subsequent text op in same sequence has a different ITT, reject
2298 : * that PDU.
2299 : */
2300 5 : if (conn->sess->current_text_itt == 0xffffffffU) {
2301 1 : conn->sess->current_text_itt = task_tag;
2302 4 : } else if (conn->sess->current_text_itt != task_tag) {
2303 1 : SPDK_ERRLOG("The correct itt is %u, and the current itt is %u...\n",
2304 : conn->sess->current_text_itt, task_tag);
2305 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
2306 : }
2307 :
2308 4 : return 0;
2309 : }
2310 :
2311 : static void
2312 0 : iscsi_conn_text_pdu_complete(void *arg)
2313 : {
2314 0 : struct spdk_iscsi_conn *conn = arg;
2315 :
2316 0 : iscsi_conn_params_update(conn);
2317 0 : }
2318 :
2319 : static int
2320 1 : iscsi_pdu_payload_op_text(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
2321 : {
2322 1 : struct iscsi_param *params = NULL;
2323 : struct spdk_iscsi_pdu *rsp_pdu;
2324 : uint8_t *data;
2325 : uint64_t lun;
2326 : uint32_t task_tag;
2327 : const char *val;
2328 : int F_bit, C_bit;
2329 : int data_len;
2330 : int alloc_len;
2331 : int rc;
2332 : struct iscsi_bhs_text_req *reqh;
2333 : struct iscsi_bhs_text_resp *rsph;
2334 :
2335 1 : data_len = 0;
2336 1 : alloc_len = conn->MaxRecvDataSegmentLength;
2337 :
2338 1 : reqh = (struct iscsi_bhs_text_req *)&pdu->bhs;
2339 :
2340 1 : F_bit = !!(reqh->flags & ISCSI_FLAG_FINAL);
2341 1 : C_bit = !!(reqh->flags & ISCSI_TEXT_CONTINUE);
2342 1 : lun = from_be64(&reqh->lun);
2343 1 : task_tag = from_be32(&reqh->itt);
2344 :
2345 : /* store incoming parameters */
2346 1 : rc = iscsi_parse_params(¶ms, pdu->data, pdu->data_segment_len,
2347 : C_bit, &conn->partial_text_parameter);
2348 1 : if (rc < 0) {
2349 0 : SPDK_ERRLOG("iscsi_parse_params() failed\n");
2350 0 : iscsi_param_free(params);
2351 0 : return -1;
2352 : }
2353 :
2354 1 : if (pdu->data_segment_len == 0 && params == NULL) {
2355 1 : params = conn->params_text;
2356 1 : conn->params_text = NULL;
2357 : }
2358 :
2359 1 : data = calloc(1, alloc_len);
2360 1 : if (!data) {
2361 0 : SPDK_ERRLOG("calloc() failed for data segment\n");
2362 0 : iscsi_param_free(params);
2363 0 : return -ENOMEM;
2364 : }
2365 :
2366 : /* negotiate parameters */
2367 1 : data_len = iscsi_negotiate_params(conn, ¶ms,
2368 : data, alloc_len, data_len);
2369 1 : if (data_len < 0) {
2370 0 : SPDK_ERRLOG("iscsi_negotiate_params() failed\n");
2371 0 : iscsi_param_free(params);
2372 0 : free(data);
2373 0 : return -1;
2374 : }
2375 :
2376 : /* sendtargets is special case */
2377 1 : val = iscsi_param_get_val(params, "SendTargets");
2378 1 : if (val != NULL) {
2379 0 : if (iscsi_param_eq_val(conn->sess->params,
2380 : "SessionType", "Discovery")) {
2381 0 : if (strcasecmp(val, "") == 0) {
2382 0 : val = "ALL";
2383 : }
2384 :
2385 0 : data_len = iscsi_send_tgts(conn,
2386 0 : conn->initiator_name,
2387 : val, data, alloc_len,
2388 : data_len);
2389 : } else {
2390 0 : if (strcasecmp(val, "") == 0) {
2391 0 : val = conn->target->name;
2392 : }
2393 :
2394 0 : if (strcasecmp(val, "ALL") == 0) {
2395 : /* not in discovery session */
2396 0 : data_len = iscsi_append_text("SendTargets", "Reject",
2397 : data, alloc_len, data_len);
2398 : } else {
2399 0 : data_len = iscsi_send_tgts(conn,
2400 0 : conn->initiator_name,
2401 : val, data, alloc_len,
2402 : data_len);
2403 : }
2404 : }
2405 :
2406 0 : if (conn->send_tgt_completed_size != 0) {
2407 0 : F_bit = 0;
2408 0 : C_bit = 1;
2409 : }
2410 : } else {
2411 1 : if (iscsi_param_eq_val(conn->sess->params, "SessionType", "Discovery")) {
2412 0 : iscsi_param_free(params);
2413 0 : free(data);
2414 0 : return SPDK_ISCSI_CONNECTION_FATAL;
2415 : }
2416 : }
2417 :
2418 1 : if (spdk_likely(conn->send_tgt_completed_size == 0)) {
2419 1 : iscsi_param_free(params);
2420 : } else {
2421 0 : conn->params_text = params;
2422 : }
2423 1 : SPDK_LOGDUMP(iscsi, "Negotiated Params", data, data_len);
2424 :
2425 : /* response PDU */
2426 1 : rsp_pdu = iscsi_get_pdu(conn);
2427 1 : if (rsp_pdu == NULL) {
2428 0 : free(data);
2429 0 : return SPDK_ISCSI_CONNECTION_FATAL;
2430 : }
2431 1 : rsph = (struct iscsi_bhs_text_resp *)&rsp_pdu->bhs;
2432 :
2433 1 : rsp_pdu->data = data;
2434 1 : rsph->opcode = ISCSI_OP_TEXT_RSP;
2435 :
2436 1 : if (F_bit) {
2437 0 : rsph->flags |= ISCSI_FLAG_FINAL;
2438 : }
2439 :
2440 1 : if (C_bit) {
2441 1 : rsph->flags |= ISCSI_TEXT_CONTINUE;
2442 : }
2443 :
2444 1 : DSET24(rsph->data_segment_len, data_len);
2445 1 : to_be64(&rsph->lun, lun);
2446 1 : to_be32(&rsph->itt, task_tag);
2447 :
2448 1 : if (F_bit) {
2449 0 : rsph->ttt = 0xffffffffU;
2450 0 : conn->sess->current_text_itt = 0xffffffffU;
2451 : } else {
2452 1 : to_be32(&rsph->ttt, 1 + conn->id);
2453 : }
2454 :
2455 1 : to_be32(&rsph->stat_sn, conn->StatSN);
2456 1 : conn->StatSN++;
2457 :
2458 1 : if (reqh->immediate == 0) {
2459 1 : conn->sess->MaxCmdSN++;
2460 : }
2461 :
2462 1 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
2463 1 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
2464 :
2465 1 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_text_pdu_complete, conn);
2466 1 : return 0;
2467 : }
2468 :
2469 : static void
2470 0 : iscsi_conn_logout_pdu_complete(void *arg)
2471 : {
2472 0 : struct spdk_iscsi_conn *conn = arg;
2473 :
2474 0 : if (conn->sess == NULL) {
2475 : /*
2476 : * login failed but initiator still sent a logout rather than
2477 : * just closing the TCP connection.
2478 : */
2479 0 : SPDK_DEBUGLOG(iscsi, "Logout(login failed) from %s (%s) on"
2480 : " (%s:%s,%d)\n",
2481 : conn->initiator_name, conn->initiator_addr,
2482 : conn->portal_host, conn->portal_port, conn->pg_tag);
2483 0 : } else if (iscsi_param_eq_val(conn->sess->params, "SessionType", "Normal")) {
2484 0 : SPDK_DEBUGLOG(iscsi, "Logout from %s (%s) on %s tgt_node%d"
2485 : " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u,"
2486 : " CID=%u, HeaderDigest=%s, DataDigest=%s\n",
2487 : conn->initiator_name, conn->initiator_addr,
2488 : conn->target->name, conn->target->num,
2489 : conn->portal_host, conn->portal_port, conn->pg_tag,
2490 : conn->sess->isid, conn->sess->tsih, conn->cid,
2491 : (iscsi_param_eq_val(conn->params, "HeaderDigest", "CRC32C")
2492 : ? "on" : "off"),
2493 : (iscsi_param_eq_val(conn->params, "DataDigest", "CRC32C")
2494 : ? "on" : "off"));
2495 : } else {
2496 : /* discovery session */
2497 0 : SPDK_DEBUGLOG(iscsi, "Logout(discovery) from %s (%s) on"
2498 : " (%s:%s,%d), ISID=%"PRIx64", TSIH=%u,"
2499 : " CID=%u, HeaderDigest=%s, DataDigest=%s\n",
2500 : conn->initiator_name, conn->initiator_addr,
2501 : conn->portal_host, conn->portal_port, conn->pg_tag,
2502 : conn->sess->isid, conn->sess->tsih, conn->cid,
2503 : (iscsi_param_eq_val(conn->params, "HeaderDigest", "CRC32C")
2504 : ? "on" : "off"),
2505 : (iscsi_param_eq_val(conn->params, "DataDigest", "CRC32C")
2506 : ? "on" : "off"));
2507 : }
2508 0 : }
2509 :
2510 : static int
2511 5 : iscsi_pdu_hdr_op_logout(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
2512 : {
2513 : struct spdk_iscsi_pdu *rsp_pdu;
2514 : uint32_t task_tag;
2515 : uint32_t ExpStatSN;
2516 : int response;
2517 : struct iscsi_bhs_logout_req *reqh;
2518 : struct iscsi_bhs_logout_resp *rsph;
2519 : uint16_t cid;
2520 :
2521 5 : reqh = (struct iscsi_bhs_logout_req *)&pdu->bhs;
2522 :
2523 5 : cid = from_be16(&reqh->cid);
2524 5 : task_tag = from_be32(&reqh->itt);
2525 5 : ExpStatSN = from_be32(&reqh->exp_stat_sn);
2526 :
2527 5 : SPDK_DEBUGLOG(iscsi, "reason=%d, ITT=%x, cid=%d\n",
2528 : reqh->reason, task_tag, cid);
2529 :
2530 5 : if (conn->sess != NULL) {
2531 4 : if (conn->sess->session_type == SESSION_TYPE_DISCOVERY &&
2532 1 : reqh->reason != ISCSI_LOGOUT_REASON_CLOSE_SESSION) {
2533 1 : SPDK_ERRLOG("Target can accept logout only with reason \"close the session\" "
2534 : "on discovery session. %d is not acceptable reason.\n",
2535 : reqh->reason);
2536 1 : return SPDK_ISCSI_CONNECTION_FATAL;
2537 : }
2538 :
2539 3 : SPDK_DEBUGLOG(iscsi,
2540 : "CmdSN=%u, ExpStatSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n",
2541 : pdu->cmd_sn, ExpStatSN, conn->StatSN,
2542 : conn->sess->ExpCmdSN, conn->sess->MaxCmdSN);
2543 :
2544 3 : if (pdu->cmd_sn != conn->sess->ExpCmdSN) {
2545 3 : SPDK_DEBUGLOG(iscsi, "CmdSN(%u) might have dropped\n", pdu->cmd_sn);
2546 : /* ignore error */
2547 : }
2548 : } else {
2549 1 : SPDK_DEBUGLOG(iscsi, "CmdSN=%u, ExpStatSN=%u, StatSN=%u\n",
2550 : pdu->cmd_sn, ExpStatSN, conn->StatSN);
2551 : }
2552 :
2553 4 : if (ExpStatSN != conn->StatSN) {
2554 3 : SPDK_DEBUGLOG(iscsi, "StatSN(%u/%u) might have dropped\n",
2555 : ExpStatSN, conn->StatSN);
2556 : /* ignore error */
2557 : }
2558 :
2559 4 : if (conn->cid == cid) {
2560 : /* connection or session closed successfully */
2561 3 : response = 0;
2562 3 : iscsi_conn_logout(conn);
2563 : } else {
2564 1 : response = 1;
2565 : }
2566 :
2567 : /* response PDU */
2568 4 : rsp_pdu = iscsi_get_pdu(conn);
2569 4 : if (rsp_pdu == NULL) {
2570 1 : return SPDK_ISCSI_CONNECTION_FATAL;
2571 : }
2572 3 : rsph = (struct iscsi_bhs_logout_resp *)&rsp_pdu->bhs;
2573 3 : rsp_pdu->data = NULL;
2574 3 : rsph->opcode = ISCSI_OP_LOGOUT_RSP;
2575 3 : rsph->flags |= 0x80; /* bit 0 must be 1 */
2576 3 : rsph->response = response;
2577 3 : DSET24(rsph->data_segment_len, 0);
2578 3 : to_be32(&rsph->itt, task_tag);
2579 :
2580 3 : if (conn->sess != NULL) {
2581 2 : to_be32(&rsph->stat_sn, conn->StatSN);
2582 2 : conn->StatSN++;
2583 :
2584 2 : if (conn->sess->connections == 1) {
2585 2 : conn->sess->MaxCmdSN++;
2586 : }
2587 :
2588 2 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
2589 2 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
2590 : } else {
2591 1 : to_be32(&rsph->stat_sn, conn->StatSN);
2592 1 : conn->StatSN++;
2593 1 : to_be32(&rsph->exp_cmd_sn, pdu->cmd_sn);
2594 1 : to_be32(&rsph->max_cmd_sn, pdu->cmd_sn);
2595 : }
2596 :
2597 3 : rsph->time_2_wait = 0;
2598 3 : rsph->time_2_retain = 0;
2599 :
2600 3 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_logout_pdu_complete, conn);
2601 :
2602 3 : return 0;
2603 : }
2604 :
2605 : static int
2606 9 : iscsi_send_r2t(struct spdk_iscsi_conn *conn,
2607 : struct spdk_iscsi_task *task, int offset,
2608 : int len, uint32_t transfer_tag, uint32_t *R2TSN)
2609 : {
2610 : struct spdk_iscsi_pdu *rsp_pdu;
2611 : struct iscsi_bhs_r2t *rsph;
2612 : uint64_t fmt_lun;
2613 :
2614 : /* R2T PDU */
2615 9 : rsp_pdu = iscsi_get_pdu(conn);
2616 9 : if (rsp_pdu == NULL) {
2617 0 : return SPDK_ISCSI_CONNECTION_FATAL;
2618 : }
2619 9 : rsph = (struct iscsi_bhs_r2t *)&rsp_pdu->bhs;
2620 9 : rsp_pdu->data = NULL;
2621 9 : rsph->opcode = ISCSI_OP_R2T;
2622 9 : rsph->flags |= 0x80; /* bit 0 is default to 1 */
2623 9 : fmt_lun = spdk_scsi_lun_id_int_to_fmt(task->lun_id);
2624 9 : to_be64(&rsph->lun, fmt_lun);
2625 9 : to_be32(&rsph->itt, task->tag);
2626 9 : to_be32(&rsph->ttt, transfer_tag);
2627 :
2628 9 : to_be32(&rsph->stat_sn, conn->StatSN);
2629 9 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
2630 9 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
2631 :
2632 9 : to_be32(&rsph->r2t_sn, *R2TSN);
2633 9 : *R2TSN += 1;
2634 :
2635 9 : task->r2t_datasn = 0; /* next expected datasn to ack */
2636 :
2637 9 : to_be32(&rsph->buffer_offset, (uint32_t)offset);
2638 9 : to_be32(&rsph->desired_xfer_len, (uint32_t)len);
2639 9 : task->desired_data_transfer_length = (size_t)len;
2640 :
2641 : /* we need to hold onto this task/cmd because until the PDU has been
2642 : * written out */
2643 9 : rsp_pdu->task = task;
2644 9 : task->scsi.ref++;
2645 :
2646 9 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_pdu_generic_complete, NULL);
2647 :
2648 9 : return 0;
2649 : }
2650 :
2651 : /* This function is used to remove the r2t pdu from snack_pdu_list by < task, r2t_sn> info */
2652 : static struct spdk_iscsi_pdu *
2653 0 : iscsi_remove_r2t_pdu_from_snack_list(struct spdk_iscsi_conn *conn,
2654 : struct spdk_iscsi_task *task,
2655 : uint32_t r2t_sn)
2656 : {
2657 : struct spdk_iscsi_pdu *pdu;
2658 : struct iscsi_bhs_r2t *r2t_header;
2659 :
2660 0 : TAILQ_FOREACH(pdu, &conn->snack_pdu_list, tailq) {
2661 0 : if (pdu->bhs.opcode == ISCSI_OP_R2T) {
2662 0 : r2t_header = (struct iscsi_bhs_r2t *)&pdu->bhs;
2663 0 : if (pdu->task == task &&
2664 0 : from_be32(&r2t_header->r2t_sn) == r2t_sn) {
2665 0 : TAILQ_REMOVE(&conn->snack_pdu_list, pdu, tailq);
2666 0 : return pdu;
2667 : }
2668 : }
2669 : }
2670 :
2671 0 : return NULL;
2672 : }
2673 :
2674 : /* This function is used re-send the r2t packet */
2675 : static int
2676 0 : iscsi_send_r2t_recovery(struct spdk_iscsi_conn *conn,
2677 : struct spdk_iscsi_task *task, uint32_t r2t_sn,
2678 : bool send_new_r2tsn)
2679 : {
2680 : struct spdk_iscsi_pdu *pdu;
2681 : struct iscsi_bhs_r2t *rsph;
2682 : uint32_t transfer_len;
2683 : uint32_t len;
2684 : int rc;
2685 :
2686 : /* remove the r2t pdu from the snack_list */
2687 0 : pdu = iscsi_remove_r2t_pdu_from_snack_list(conn, task, r2t_sn);
2688 0 : if (!pdu) {
2689 0 : SPDK_DEBUGLOG(iscsi, "No pdu is found\n");
2690 0 : return -1;
2691 : }
2692 :
2693 : /* flag
2694 : * false: only need to re-send the old r2t with changing statsn
2695 : * true: we send a r2t with new r2tsn
2696 : */
2697 0 : if (!send_new_r2tsn) {
2698 0 : to_be32(&pdu->bhs.stat_sn, conn->StatSN);
2699 0 : iscsi_conn_write_pdu(conn, pdu, iscsi_conn_pdu_generic_complete, NULL);
2700 : } else {
2701 0 : rsph = (struct iscsi_bhs_r2t *)&pdu->bhs;
2702 0 : transfer_len = from_be32(&rsph->desired_xfer_len);
2703 :
2704 : /* still need to increase the acked r2tsn */
2705 0 : task->acked_r2tsn++;
2706 0 : len = spdk_min(conn->sess->MaxBurstLength,
2707 : (transfer_len - task->next_expected_r2t_offset));
2708 :
2709 : /* remove the old_r2t_pdu */
2710 0 : iscsi_conn_free_pdu(conn, pdu);
2711 :
2712 : /* re-send a new r2t pdu */
2713 0 : rc = iscsi_send_r2t(conn, task, task->next_expected_r2t_offset,
2714 : len, task->ttt, &task->R2TSN);
2715 0 : if (rc < 0) {
2716 0 : return SPDK_ISCSI_CONNECTION_FATAL;
2717 : }
2718 : }
2719 :
2720 0 : return 0;
2721 : }
2722 :
2723 : static int
2724 20 : add_transfer_task(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task)
2725 : {
2726 : uint32_t transfer_len;
2727 : size_t max_burst_len;
2728 : size_t segment_len;
2729 : size_t data_len;
2730 : int len;
2731 : int rc;
2732 : int data_out_req;
2733 :
2734 20 : transfer_len = task->scsi.transfer_len;
2735 20 : data_len = iscsi_task_get_pdu(task)->data_segment_len;
2736 20 : max_burst_len = conn->sess->MaxBurstLength;
2737 20 : segment_len = SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH;
2738 20 : data_out_req = 1 + (transfer_len - data_len - 1) / segment_len;
2739 20 : task->data_out_cnt = data_out_req;
2740 :
2741 : /*
2742 : * If we already have too many tasks using R2T, then queue this task
2743 : * and start sending R2T for it after some of the tasks using R2T/data
2744 : * out buffers complete.
2745 : */
2746 20 : if (conn->pending_r2t >= g_iscsi.MaxR2TPerConnection) {
2747 4 : TAILQ_INSERT_TAIL(&conn->queued_r2t_tasks, task, link);
2748 4 : return 0;
2749 : }
2750 :
2751 16 : conn->data_out_cnt += data_out_req;
2752 16 : conn->pending_r2t++;
2753 :
2754 16 : task->next_expected_r2t_offset = data_len;
2755 16 : task->current_r2t_length = 0;
2756 16 : task->R2TSN = 0;
2757 : /* According to RFC3720 10.8.5, 0xffffffff is
2758 : * reserved for TTT in R2T.
2759 : */
2760 16 : if (++conn->ttt == 0xffffffffu) {
2761 0 : conn->ttt = 0;
2762 : }
2763 16 : task->ttt = conn->ttt;
2764 :
2765 22 : while (data_len != transfer_len) {
2766 8 : len = spdk_min(max_burst_len, (transfer_len - data_len));
2767 8 : rc = iscsi_send_r2t(conn, task, data_len, len,
2768 : task->ttt, &task->R2TSN);
2769 8 : if (rc < 0) {
2770 0 : SPDK_ERRLOG("iscsi_send_r2t() failed\n");
2771 0 : return rc;
2772 : }
2773 8 : data_len += len;
2774 8 : task->next_r2t_offset = data_len;
2775 8 : task->outstanding_r2t++;
2776 8 : if (conn->sess->MaxOutstandingR2T == task->outstanding_r2t) {
2777 2 : break;
2778 : }
2779 : }
2780 :
2781 16 : TAILQ_INSERT_TAIL(&conn->active_r2t_tasks, task, link);
2782 16 : task->is_r2t_active = true;
2783 16 : return 0;
2784 : }
2785 :
2786 : /* If there are additional large writes queued for R2Ts, start them now.
2787 : * This is called when a large write is just completed or when multiple LUNs
2788 : * are attached and large write tasks for the specific LUN are cleared.
2789 : */
2790 : static void
2791 9 : start_queued_transfer_tasks(struct spdk_iscsi_conn *conn)
2792 : {
2793 : struct spdk_iscsi_task *task, *tmp;
2794 :
2795 12 : TAILQ_FOREACH_SAFE(task, &conn->queued_r2t_tasks, link, tmp) {
2796 4 : if (conn->pending_r2t < g_iscsi.MaxR2TPerConnection) {
2797 3 : TAILQ_REMOVE(&conn->queued_r2t_tasks, task, link);
2798 3 : add_transfer_task(conn, task);
2799 : } else {
2800 1 : break;
2801 : }
2802 : }
2803 9 : }
2804 :
2805 : bool
2806 5 : iscsi_del_transfer_task(struct spdk_iscsi_conn *conn, uint32_t task_tag)
2807 : {
2808 : struct spdk_iscsi_task *task, *tmp;
2809 :
2810 5 : TAILQ_FOREACH_SAFE(task, &conn->active_r2t_tasks, link, tmp) {
2811 5 : if (task->tag == task_tag) {
2812 5 : assert(conn->data_out_cnt >= task->data_out_cnt);
2813 5 : conn->data_out_cnt -= task->data_out_cnt;
2814 :
2815 5 : assert(conn->pending_r2t > 0);
2816 5 : conn->pending_r2t--;
2817 :
2818 5 : assert(task->is_r2t_active == true);
2819 5 : TAILQ_REMOVE(&conn->active_r2t_tasks, task, link);
2820 5 : task->is_r2t_active = false;
2821 5 : iscsi_task_put(task);
2822 :
2823 5 : start_queued_transfer_tasks(conn);
2824 5 : return true;
2825 : }
2826 : }
2827 0 : return false;
2828 : }
2829 :
2830 : void
2831 4 : iscsi_clear_all_transfer_task(struct spdk_iscsi_conn *conn,
2832 : struct spdk_scsi_lun *lun,
2833 : struct spdk_iscsi_pdu *pdu)
2834 : {
2835 : struct spdk_iscsi_task *task, *task_tmp;
2836 : struct spdk_iscsi_pdu *pdu_tmp;
2837 :
2838 16 : TAILQ_FOREACH_SAFE(task, &conn->active_r2t_tasks, link, task_tmp) {
2839 12 : pdu_tmp = iscsi_task_get_pdu(task);
2840 12 : if ((lun == NULL || lun == task->scsi.lun) &&
2841 6 : (pdu == NULL || spdk_sn32_lt(pdu_tmp->cmd_sn, pdu->cmd_sn))) {
2842 6 : task->outstanding_r2t = 0;
2843 6 : task->next_r2t_offset = 0;
2844 6 : task->next_expected_r2t_offset = 0;
2845 6 : task->current_data_offset = 0;
2846 6 : assert(conn->data_out_cnt >= task->data_out_cnt);
2847 6 : conn->data_out_cnt -= task->data_out_cnt;
2848 6 : assert(conn->pending_r2t > 0);
2849 6 : conn->pending_r2t--;
2850 :
2851 6 : TAILQ_REMOVE(&conn->active_r2t_tasks, task, link);
2852 6 : task->is_r2t_active = false;
2853 6 : if (lun != NULL && spdk_scsi_lun_is_removing(lun)) {
2854 5 : spdk_scsi_task_process_null_lun(&task->scsi);
2855 5 : iscsi_task_response(conn, task);
2856 : }
2857 6 : iscsi_task_put(task);
2858 : }
2859 : }
2860 :
2861 7 : TAILQ_FOREACH_SAFE(task, &conn->queued_r2t_tasks, link, task_tmp) {
2862 3 : pdu_tmp = iscsi_task_get_pdu(task);
2863 3 : if ((lun == NULL || lun == task->scsi.lun) &&
2864 0 : (pdu == NULL || spdk_sn32_lt(pdu_tmp->cmd_sn, pdu->cmd_sn))) {
2865 0 : TAILQ_REMOVE(&conn->queued_r2t_tasks, task, link);
2866 0 : task->is_r2t_active = false;
2867 0 : if (lun != NULL && spdk_scsi_lun_is_removing(lun)) {
2868 0 : spdk_scsi_task_process_null_lun(&task->scsi);
2869 0 : iscsi_task_response(conn, task);
2870 : }
2871 0 : iscsi_task_put(task);
2872 : }
2873 : }
2874 :
2875 4 : start_queued_transfer_tasks(conn);
2876 4 : }
2877 :
2878 : static struct spdk_iscsi_task *
2879 65 : get_transfer_task(struct spdk_iscsi_conn *conn, uint32_t transfer_tag)
2880 : {
2881 : struct spdk_iscsi_task *task;
2882 :
2883 121 : TAILQ_FOREACH(task, &conn->active_r2t_tasks, link) {
2884 105 : if (task->ttt == transfer_tag) {
2885 49 : return task;
2886 : }
2887 : }
2888 :
2889 16 : return NULL;
2890 : }
2891 :
2892 : static void
2893 0 : iscsi_conn_datain_pdu_complete(void *arg)
2894 : {
2895 0 : struct spdk_iscsi_conn *conn = arg;
2896 :
2897 0 : iscsi_conn_handle_queued_datain_tasks(conn);
2898 0 : }
2899 :
2900 : static int
2901 2 : iscsi_send_datain(struct spdk_iscsi_conn *conn,
2902 : struct spdk_iscsi_task *task, int datain_flag,
2903 : int residual_len, int offset, int DataSN, int len)
2904 : {
2905 : struct spdk_iscsi_pdu *rsp_pdu;
2906 : struct iscsi_bhs_data_in *rsph;
2907 : uint32_t task_tag;
2908 : uint32_t transfer_tag;
2909 : int F_bit, U_bit, O_bit, S_bit;
2910 : struct spdk_iscsi_task *primary;
2911 : struct spdk_scsi_lun *lun_dev;
2912 :
2913 2 : primary = iscsi_task_get_primary(task);
2914 :
2915 : /* DATA PDU */
2916 2 : rsp_pdu = iscsi_get_pdu(conn);
2917 2 : rsph = (struct iscsi_bhs_data_in *)&rsp_pdu->bhs;
2918 2 : rsp_pdu->data = task->scsi.iovs[0].iov_base + offset;
2919 2 : rsp_pdu->data_buf_len = task->scsi.iovs[0].iov_len - offset;
2920 2 : rsp_pdu->data_valid_bytes = len;
2921 2 : rsp_pdu->data_from_mempool = true;
2922 :
2923 2 : task_tag = task->tag;
2924 2 : transfer_tag = 0xffffffffU;
2925 :
2926 2 : F_bit = datain_flag & ISCSI_FLAG_FINAL;
2927 2 : O_bit = datain_flag & ISCSI_DATAIN_OVERFLOW;
2928 2 : U_bit = datain_flag & ISCSI_DATAIN_UNDERFLOW;
2929 2 : S_bit = datain_flag & ISCSI_DATAIN_STATUS;
2930 :
2931 : /*
2932 : * we need to hold onto this task/cmd because until the
2933 : * PDU has been written out
2934 : */
2935 2 : rsp_pdu->task = task;
2936 2 : task->scsi.ref++;
2937 :
2938 2 : rsph->opcode = ISCSI_OP_SCSI_DATAIN;
2939 :
2940 2 : if (F_bit) {
2941 2 : rsph->flags |= ISCSI_FLAG_FINAL;
2942 : }
2943 :
2944 : /* we leave the A_bit clear */
2945 :
2946 2 : if (F_bit && S_bit) {
2947 1 : if (O_bit) {
2948 0 : rsph->flags |= ISCSI_DATAIN_OVERFLOW;
2949 : }
2950 :
2951 1 : if (U_bit) {
2952 1 : rsph->flags |= ISCSI_DATAIN_UNDERFLOW;
2953 : }
2954 : }
2955 :
2956 2 : if (S_bit) {
2957 1 : rsph->flags |= ISCSI_DATAIN_STATUS;
2958 1 : rsph->status = task->scsi.status;
2959 : }
2960 :
2961 2 : DSET24(rsph->data_segment_len, len);
2962 :
2963 2 : to_be32(&rsph->itt, task_tag);
2964 2 : to_be32(&rsph->ttt, transfer_tag);
2965 :
2966 2 : if (S_bit) {
2967 1 : to_be32(&rsph->stat_sn, conn->StatSN);
2968 1 : conn->StatSN++;
2969 : }
2970 :
2971 2 : if (F_bit && S_bit && !iscsi_task_is_immediate(primary)) {
2972 1 : conn->sess->MaxCmdSN++;
2973 : }
2974 :
2975 2 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
2976 2 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
2977 :
2978 2 : to_be32(&rsph->data_sn, DataSN);
2979 :
2980 2 : if (conn->sess->ErrorRecoveryLevel >= 1) {
2981 0 : primary->datain_datasn = DataSN;
2982 : }
2983 2 : DataSN++;
2984 :
2985 2 : offset += task->scsi.offset;
2986 2 : to_be32(&rsph->buffer_offset, (uint32_t)offset);
2987 :
2988 2 : if (F_bit && S_bit) {
2989 1 : to_be32(&rsph->res_cnt, residual_len);
2990 : }
2991 :
2992 2 : lun_dev = spdk_scsi_dev_get_lun(conn->dev, task->lun_id);
2993 2 : if (spdk_likely(lun_dev != NULL)) {
2994 2 : if (spdk_unlikely(spdk_scsi_lun_get_dif_ctx(lun_dev, &task->scsi,
2995 : &rsp_pdu->dif_ctx))) {
2996 0 : rsp_pdu->dif_insert_or_strip = true;
2997 : }
2998 : }
2999 :
3000 2 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_datain_pdu_complete, conn);
3001 :
3002 2 : return DataSN;
3003 : }
3004 :
3005 : static int
3006 4 : iscsi_transfer_in(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task)
3007 : {
3008 : uint32_t DataSN;
3009 : uint32_t transfer_len;
3010 : uint32_t data_len;
3011 : uint32_t segment_len;
3012 : uint32_t offset;
3013 4 : uint32_t residual_len = 0;
3014 : int sent_status;
3015 : uint32_t len;
3016 4 : int datain_flag = 0;
3017 : int datain_seq_cnt;
3018 : int i;
3019 : uint32_t sequence_end;
3020 : struct spdk_iscsi_task *primary;
3021 :
3022 4 : primary = iscsi_task_get_primary(task);
3023 4 : segment_len = conn->MaxRecvDataSegmentLength;
3024 4 : data_len = task->scsi.data_transferred;
3025 4 : transfer_len = task->scsi.length;
3026 :
3027 4 : if (task->scsi.status != SPDK_SCSI_STATUS_GOOD) {
3028 1 : return 0;
3029 : }
3030 :
3031 3 : if (data_len < transfer_len) {
3032 : /* underflow */
3033 3 : SPDK_DEBUGLOG(iscsi, "Underflow %u/%u\n", data_len, transfer_len);
3034 3 : residual_len = transfer_len - data_len;
3035 3 : transfer_len = data_len;
3036 3 : datain_flag |= ISCSI_DATAIN_UNDERFLOW;
3037 0 : } else if (data_len > transfer_len) {
3038 : /* overflow */
3039 0 : SPDK_DEBUGLOG(iscsi, "Overflow %u/%u\n", data_len, transfer_len);
3040 0 : residual_len = data_len - transfer_len;
3041 0 : datain_flag |= ISCSI_DATAIN_OVERFLOW;
3042 : } else {
3043 0 : SPDK_DEBUGLOG(iscsi, "Transfer %u\n", transfer_len);
3044 0 : residual_len = 0;
3045 : }
3046 :
3047 3 : DataSN = primary->datain_datasn;
3048 3 : sent_status = 0;
3049 :
3050 : /* calculate the number of sequences for all data-in pdus */
3051 3 : datain_seq_cnt = 1 + ((transfer_len - 1) / (int)conn->sess->MaxBurstLength);
3052 4101 : for (i = 0; i < datain_seq_cnt; i++) {
3053 4098 : offset = i * conn->sess->MaxBurstLength;
3054 4098 : sequence_end = spdk_min(((i + 1) * conn->sess->MaxBurstLength),
3055 : transfer_len);
3056 :
3057 : /* send data split by segment_len */
3058 4100 : for (; offset < sequence_end; offset += segment_len) {
3059 2 : len = spdk_min(segment_len, (sequence_end - offset));
3060 :
3061 2 : datain_flag &= ~(ISCSI_FLAG_FINAL | ISCSI_DATAIN_STATUS);
3062 :
3063 2 : if (offset + len == sequence_end) {
3064 : /* last PDU in a sequence */
3065 2 : datain_flag |= ISCSI_FLAG_FINAL;
3066 2 : if (task->scsi.sense_data_len == 0) {
3067 : /* The last pdu in all data-in pdus */
3068 1 : if ((offset + len) == transfer_len &&
3069 1 : (primary->bytes_completed == primary->scsi.transfer_len)) {
3070 1 : datain_flag |= ISCSI_DATAIN_STATUS;
3071 1 : sent_status = 1;
3072 : }
3073 : }
3074 : }
3075 :
3076 2 : SPDK_DEBUGLOG(iscsi, "Transfer=%d, Offset=%d, Len=%d\n",
3077 : sequence_end, offset, len);
3078 2 : SPDK_DEBUGLOG(iscsi, "StatSN=%u, DataSN=%u, Offset=%u, Len=%d\n",
3079 : conn->StatSN, DataSN, offset, len);
3080 :
3081 2 : DataSN = iscsi_send_datain(conn, task, datain_flag, residual_len,
3082 : offset, DataSN, len);
3083 : }
3084 : }
3085 :
3086 3 : if (task != primary) {
3087 0 : primary->scsi.data_transferred += task->scsi.data_transferred;
3088 : }
3089 3 : primary->datain_datasn = DataSN;
3090 :
3091 3 : return sent_status;
3092 : }
3093 :
3094 : void
3095 9 : iscsi_task_response(struct spdk_iscsi_conn *conn,
3096 : struct spdk_iscsi_task *task)
3097 : {
3098 : struct spdk_iscsi_pdu *rsp_pdu;
3099 : struct iscsi_bhs_scsi_resp *rsph;
3100 : uint32_t task_tag;
3101 : uint32_t transfer_len;
3102 : size_t residual_len;
3103 : size_t data_len;
3104 : int O_bit, U_bit;
3105 : int rc;
3106 : struct spdk_iscsi_task *primary;
3107 :
3108 9 : primary = iscsi_task_get_primary(task);
3109 :
3110 9 : transfer_len = primary->scsi.transfer_len;
3111 9 : task_tag = task->tag;
3112 :
3113 : /* transfer data from logical unit */
3114 : /* (direction is view of initiator side) */
3115 9 : if (iscsi_task_is_read(primary)) {
3116 4 : rc = iscsi_transfer_in(conn, task);
3117 4 : if (rc > 0) {
3118 : /* sent status by last DATAIN PDU */
3119 1 : return;
3120 : }
3121 :
3122 3 : if (primary->bytes_completed != primary->scsi.transfer_len) {
3123 0 : return;
3124 : }
3125 : }
3126 :
3127 8 : O_bit = U_bit = 0;
3128 8 : residual_len = 0;
3129 8 : data_len = primary->scsi.data_transferred;
3130 :
3131 8 : if ((transfer_len != 0) &&
3132 8 : (task->scsi.status == SPDK_SCSI_STATUS_GOOD)) {
3133 7 : if (data_len < transfer_len) {
3134 : /* underflow */
3135 7 : SPDK_DEBUGLOG(iscsi, "Underflow %zu/%u\n", data_len, transfer_len);
3136 7 : residual_len = transfer_len - data_len;
3137 7 : U_bit = 1;
3138 0 : } else if (data_len > transfer_len) {
3139 : /* overflow */
3140 0 : SPDK_DEBUGLOG(iscsi, "Overflow %zu/%u\n", data_len, transfer_len);
3141 0 : residual_len = data_len - transfer_len;
3142 0 : O_bit = 1;
3143 : } else {
3144 0 : SPDK_DEBUGLOG(iscsi, "Transfer %u\n", transfer_len);
3145 : }
3146 : }
3147 :
3148 : /* response PDU */
3149 8 : rsp_pdu = iscsi_get_pdu(conn);
3150 8 : assert(rsp_pdu != NULL);
3151 8 : rsph = (struct iscsi_bhs_scsi_resp *)&rsp_pdu->bhs;
3152 8 : assert(task->scsi.sense_data_len <= sizeof(rsp_pdu->sense.data));
3153 8 : memcpy(rsp_pdu->sense.data, task->scsi.sense_data, task->scsi.sense_data_len);
3154 8 : to_be16(&rsp_pdu->sense.length, task->scsi.sense_data_len);
3155 8 : rsp_pdu->data = (uint8_t *)&rsp_pdu->sense;
3156 8 : rsp_pdu->data_from_mempool = true;
3157 :
3158 : /*
3159 : * we need to hold onto this task/cmd because until the
3160 : * PDU has been written out
3161 : */
3162 8 : rsp_pdu->task = task;
3163 8 : task->scsi.ref++;
3164 :
3165 8 : rsph->opcode = ISCSI_OP_SCSI_RSP;
3166 8 : rsph->flags |= 0x80; /* bit 0 is default to 1 */
3167 :
3168 8 : if (O_bit) {
3169 0 : rsph->flags |= ISCSI_SCSI_OVERFLOW;
3170 : }
3171 :
3172 8 : if (U_bit) {
3173 7 : rsph->flags |= ISCSI_SCSI_UNDERFLOW;
3174 : }
3175 :
3176 8 : rsph->status = task->scsi.status;
3177 8 : if (task->scsi.sense_data_len) {
3178 : /* SenseLength (2 bytes) + SenseData */
3179 2 : DSET24(rsph->data_segment_len, 2 + task->scsi.sense_data_len);
3180 : }
3181 8 : to_be32(&rsph->itt, task_tag);
3182 :
3183 8 : to_be32(&rsph->stat_sn, conn->StatSN);
3184 8 : conn->StatSN++;
3185 :
3186 8 : if (!iscsi_task_is_immediate(primary)) {
3187 8 : conn->sess->MaxCmdSN++;
3188 : }
3189 :
3190 8 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
3191 8 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
3192 :
3193 8 : to_be32(&rsph->bi_read_res_cnt, 0);
3194 8 : to_be32(&rsph->res_cnt, residual_len);
3195 :
3196 8 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_pdu_generic_complete, NULL);
3197 : }
3198 :
3199 : /*
3200 : * This function compare the input pdu's bhs with the pdu's bhs associated by
3201 : * active_r2t_tasks and queued_r2t_tasks in a connection
3202 : */
3203 : static bool
3204 0 : iscsi_compare_pdu_bhs_within_existed_r2t_tasks(struct spdk_iscsi_conn *conn,
3205 : struct spdk_iscsi_pdu *pdu)
3206 : {
3207 : struct spdk_iscsi_task *task;
3208 :
3209 0 : TAILQ_FOREACH(task, &conn->active_r2t_tasks, link) {
3210 0 : if (!memcmp(&pdu->bhs, iscsi_task_get_bhs(task), ISCSI_BHS_LEN)) {
3211 0 : return true;
3212 : }
3213 : }
3214 :
3215 0 : TAILQ_FOREACH(task, &conn->queued_r2t_tasks, link) {
3216 0 : if (!memcmp(&pdu->bhs, iscsi_task_get_bhs(task), ISCSI_BHS_LEN)) {
3217 0 : return true;
3218 : }
3219 : }
3220 :
3221 0 : return false;
3222 : }
3223 :
3224 : void
3225 4 : iscsi_queue_task(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task)
3226 : {
3227 4 : spdk_trace_record(TRACE_ISCSI_TASK_QUEUE, conn->trace_id, task->scsi.length,
3228 : (uintptr_t)task, (uintptr_t)task->pdu);
3229 4 : task->is_queued = true;
3230 4 : spdk_scsi_dev_queue_task(conn->dev, &task->scsi);
3231 4 : }
3232 :
3233 : static int
3234 0 : iscsi_pdu_payload_op_scsi_read(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task)
3235 : {
3236 0 : if (task->scsi.transfer_len <= SPDK_BDEV_LARGE_BUF_MAX_SIZE) {
3237 0 : task->parent = NULL;
3238 0 : task->scsi.offset = 0;
3239 0 : task->scsi.length = task->scsi.transfer_len;
3240 0 : spdk_scsi_task_set_data(&task->scsi, NULL, 0);
3241 :
3242 0 : iscsi_queue_task(conn, task);
3243 0 : return 0;
3244 : } else {
3245 0 : TAILQ_INIT(&task->subtask_list);
3246 0 : task->current_data_offset = 0;
3247 0 : TAILQ_INSERT_TAIL(&conn->queued_datain_tasks, task, link);
3248 :
3249 0 : return iscsi_conn_handle_queued_datain_tasks(conn);
3250 : }
3251 : }
3252 :
3253 : static int
3254 4 : iscsi_submit_write_subtask(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task,
3255 : struct spdk_iscsi_pdu *pdu, struct spdk_mobj *mobj)
3256 : {
3257 : struct spdk_iscsi_task *subtask;
3258 :
3259 4 : subtask = iscsi_task_get(conn, task, iscsi_task_cpl);
3260 4 : if (subtask == NULL) {
3261 0 : SPDK_ERRLOG("Unable to acquire subtask\n");
3262 0 : return SPDK_ISCSI_CONNECTION_FATAL;
3263 : }
3264 4 : subtask->scsi.offset = task->current_data_offset;
3265 4 : subtask->scsi.length = mobj->data_len;
3266 4 : iscsi_task_associate_pdu(subtask, pdu);
3267 :
3268 4 : task->current_data_offset += mobj->data_len;
3269 :
3270 4 : if (spdk_likely(!pdu->dif_insert_or_strip)) {
3271 4 : spdk_scsi_task_set_data(&subtask->scsi, mobj->buf, mobj->data_len);
3272 : } else {
3273 0 : spdk_scsi_task_set_data(&subtask->scsi, mobj->buf, pdu->data_buf_len);
3274 : }
3275 :
3276 4 : iscsi_queue_task(conn, subtask);
3277 4 : return 0;
3278 : }
3279 :
3280 : static int
3281 2 : iscsi_pdu_payload_op_scsi_write(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task)
3282 : {
3283 : struct spdk_iscsi_pdu *pdu;
3284 : struct iscsi_bhs_scsi_req *reqh;
3285 : uint32_t transfer_len;
3286 : struct spdk_mobj *mobj;
3287 : int rc;
3288 :
3289 2 : pdu = iscsi_task_get_pdu(task);
3290 2 : reqh = (struct iscsi_bhs_scsi_req *)&pdu->bhs;
3291 :
3292 2 : transfer_len = task->scsi.transfer_len;
3293 :
3294 2 : if (reqh->final_bit &&
3295 2 : pdu->data_segment_len < transfer_len) {
3296 : /* needs R2T */
3297 2 : rc = add_transfer_task(conn, task);
3298 2 : if (rc < 0) {
3299 0 : SPDK_ERRLOG("add_transfer_task() failed\n");
3300 0 : iscsi_task_put(task);
3301 0 : return SPDK_ISCSI_CONNECTION_FATAL;
3302 : }
3303 :
3304 : /* immediate writes */
3305 2 : if (pdu->data_segment_len != 0) {
3306 1 : mobj = pdu->mobj[0];
3307 1 : assert(mobj != NULL);
3308 :
3309 1 : if (!pdu->dif_insert_or_strip &&
3310 1 : mobj->data_len < SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH) {
3311 : /* continue aggregation until the first data buffer is full. */
3312 1 : iscsi_task_set_mobj(task, mobj);
3313 1 : pdu->mobj[0] = NULL;
3314 : } else {
3315 : /* we are doing the first partial write task */
3316 0 : rc = iscsi_submit_write_subtask(conn, task, pdu, mobj);
3317 0 : if (rc < 0) {
3318 0 : iscsi_task_put(task);
3319 0 : return SPDK_ISCSI_CONNECTION_FATAL;
3320 : }
3321 : }
3322 : }
3323 2 : return 0;
3324 : }
3325 :
3326 0 : if (pdu->data_segment_len == transfer_len) {
3327 : /* we are doing small writes with no R2T */
3328 0 : if (spdk_likely(!pdu->dif_insert_or_strip)) {
3329 0 : spdk_scsi_task_set_data(&task->scsi, pdu->data, pdu->data_segment_len);
3330 : } else {
3331 0 : spdk_scsi_task_set_data(&task->scsi, pdu->data, pdu->data_buf_len);
3332 : }
3333 0 : task->scsi.length = transfer_len;
3334 : }
3335 :
3336 0 : iscsi_queue_task(conn, task);
3337 0 : return 0;
3338 : }
3339 :
3340 : static int
3341 14 : iscsi_pdu_hdr_op_scsi(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
3342 : {
3343 : struct spdk_iscsi_task *task;
3344 : struct spdk_scsi_dev *dev;
3345 : uint8_t *cdb;
3346 : uint64_t lun;
3347 : uint32_t task_tag;
3348 : uint32_t transfer_len;
3349 : int R_bit, W_bit;
3350 : int lun_i;
3351 : struct iscsi_bhs_scsi_req *reqh;
3352 :
3353 14 : if (conn->sess->session_type != SESSION_TYPE_NORMAL) {
3354 2 : SPDK_ERRLOG("ISCSI_OP_SCSI not allowed in discovery and invalid session\n");
3355 2 : return SPDK_ISCSI_CONNECTION_FATAL;
3356 : }
3357 :
3358 12 : reqh = (struct iscsi_bhs_scsi_req *)&pdu->bhs;
3359 :
3360 12 : R_bit = reqh->read_bit;
3361 12 : W_bit = reqh->write_bit;
3362 12 : lun = from_be64(&reqh->lun);
3363 12 : task_tag = from_be32(&reqh->itt);
3364 12 : transfer_len = from_be32(&reqh->expected_data_xfer_len);
3365 12 : cdb = reqh->cdb;
3366 :
3367 12 : SPDK_LOGDUMP(iscsi, "CDB", cdb, 16);
3368 :
3369 12 : task = iscsi_task_get(conn, NULL, iscsi_task_cpl);
3370 12 : if (!task) {
3371 0 : SPDK_ERRLOG("Unable to acquire task\n");
3372 0 : return SPDK_ISCSI_CONNECTION_FATAL;
3373 : }
3374 :
3375 12 : iscsi_task_associate_pdu(task, pdu);
3376 12 : lun_i = spdk_scsi_lun_id_fmt_to_int(lun);
3377 12 : task->lun_id = lun_i;
3378 12 : dev = conn->dev;
3379 12 : task->scsi.lun = spdk_scsi_dev_get_lun(dev, lun_i);
3380 :
3381 12 : if ((R_bit != 0) && (W_bit != 0)) {
3382 1 : SPDK_ERRLOG("Bidirectional CDB is not supported\n");
3383 1 : iscsi_task_put(task);
3384 1 : return SPDK_ISCSI_CONNECTION_FATAL;
3385 : }
3386 :
3387 11 : task->scsi.cdb = cdb;
3388 11 : task->tag = task_tag;
3389 11 : task->scsi.transfer_len = transfer_len;
3390 11 : task->scsi.target_port = conn->target_port;
3391 11 : task->scsi.initiator_port = conn->initiator_port;
3392 11 : task->parent = NULL;
3393 11 : task->scsi.status = SPDK_SCSI_STATUS_GOOD;
3394 :
3395 11 : if (task->scsi.lun == NULL) {
3396 1 : spdk_scsi_task_process_null_lun(&task->scsi);
3397 1 : iscsi_task_cpl(&task->scsi);
3398 1 : return 0;
3399 : }
3400 :
3401 : /* no bi-directional support */
3402 10 : if (R_bit) {
3403 1 : task->scsi.dxfer_dir = SPDK_SCSI_DIR_FROM_DEV;
3404 9 : } else if (W_bit) {
3405 7 : task->scsi.dxfer_dir = SPDK_SCSI_DIR_TO_DEV;
3406 :
3407 7 : if ((conn->sess->ErrorRecoveryLevel >= 1) &&
3408 0 : (iscsi_compare_pdu_bhs_within_existed_r2t_tasks(conn, pdu))) {
3409 0 : iscsi_task_response(conn, task);
3410 0 : iscsi_task_put(task);
3411 0 : return 0;
3412 : }
3413 :
3414 7 : if (pdu->data_segment_len > iscsi_get_max_immediate_data_size()) {
3415 1 : SPDK_ERRLOG("data segment len(=%zu) > immediate data len(=%"PRIu32")\n",
3416 : pdu->data_segment_len, iscsi_get_max_immediate_data_size());
3417 1 : iscsi_task_put(task);
3418 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
3419 : }
3420 :
3421 6 : if (pdu->data_segment_len > transfer_len) {
3422 1 : SPDK_ERRLOG("data segment len(=%zu) > task transfer len(=%d)\n",
3423 : pdu->data_segment_len, transfer_len);
3424 1 : iscsi_task_put(task);
3425 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
3426 : }
3427 :
3428 : /* check the ImmediateData and also pdu->data_segment_len */
3429 5 : if ((!conn->sess->ImmediateData && (pdu->data_segment_len > 0)) ||
3430 4 : (pdu->data_segment_len > conn->sess->FirstBurstLength)) {
3431 2 : iscsi_task_put(task);
3432 2 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
3433 : }
3434 :
3435 3 : if (spdk_unlikely(spdk_scsi_lun_get_dif_ctx(task->scsi.lun, &task->scsi, &pdu->dif_ctx))) {
3436 0 : pdu->dif_insert_or_strip = true;
3437 3 : } else if (reqh->final_bit && pdu->data_segment_len < transfer_len) {
3438 2 : pdu->data_buf_len = spdk_min(transfer_len,
3439 : SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
3440 : }
3441 : } else {
3442 : /* neither R nor W bit set */
3443 2 : task->scsi.dxfer_dir = SPDK_SCSI_DIR_NONE;
3444 2 : if (transfer_len > 0) {
3445 1 : iscsi_task_put(task);
3446 1 : SPDK_ERRLOG("Reject scsi cmd with EDTL > 0 but (R | W) == 0\n");
3447 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_PDU_FIELD);
3448 : }
3449 : }
3450 :
3451 5 : pdu->task = task;
3452 5 : return 0;
3453 : }
3454 :
3455 : static int
3456 2 : iscsi_pdu_payload_op_scsi(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
3457 : {
3458 : struct spdk_iscsi_task *task;
3459 :
3460 2 : if (pdu->task == NULL) {
3461 0 : return 0;
3462 : }
3463 :
3464 2 : task = pdu->task;
3465 :
3466 2 : if (spdk_scsi_dev_get_lun(conn->dev, task->lun_id) == NULL) {
3467 0 : spdk_scsi_task_process_null_lun(&task->scsi);
3468 0 : iscsi_task_cpl(&task->scsi);
3469 0 : return 0;
3470 : }
3471 :
3472 2 : switch (task->scsi.dxfer_dir) {
3473 0 : case SPDK_SCSI_DIR_FROM_DEV:
3474 0 : return iscsi_pdu_payload_op_scsi_read(conn, task);
3475 2 : case SPDK_SCSI_DIR_TO_DEV:
3476 2 : return iscsi_pdu_payload_op_scsi_write(conn, task);
3477 0 : case SPDK_SCSI_DIR_NONE:
3478 0 : iscsi_queue_task(conn, task);
3479 0 : return 0;
3480 0 : default:
3481 0 : assert(false);
3482 : iscsi_task_put(task);
3483 : break;
3484 : }
3485 :
3486 : return SPDK_ISCSI_CONNECTION_FATAL;
3487 : }
3488 :
3489 : void
3490 7 : iscsi_task_mgmt_response(struct spdk_iscsi_conn *conn,
3491 : struct spdk_iscsi_task *task)
3492 : {
3493 : struct spdk_iscsi_pdu *rsp_pdu;
3494 : struct iscsi_bhs_task_req *reqh;
3495 : struct iscsi_bhs_task_resp *rsph;
3496 :
3497 7 : if (task->pdu == NULL) {
3498 : /*
3499 : * This was an internally generated task management command,
3500 : * usually from LUN cleanup when a connection closes.
3501 : */
3502 0 : return;
3503 : }
3504 :
3505 7 : reqh = (struct iscsi_bhs_task_req *)&task->pdu->bhs;
3506 : /* response PDU */
3507 7 : rsp_pdu = iscsi_get_pdu(conn);
3508 7 : rsph = (struct iscsi_bhs_task_resp *)&rsp_pdu->bhs;
3509 7 : rsph->opcode = ISCSI_OP_TASK_RSP;
3510 7 : rsph->flags |= 0x80; /* bit 0 default to 1 */
3511 7 : switch (task->scsi.response) {
3512 0 : case SPDK_SCSI_TASK_MGMT_RESP_COMPLETE:
3513 0 : rsph->response = ISCSI_TASK_FUNC_RESP_COMPLETE;
3514 0 : break;
3515 0 : case SPDK_SCSI_TASK_MGMT_RESP_SUCCESS:
3516 0 : rsph->response = ISCSI_TASK_FUNC_RESP_COMPLETE;
3517 0 : break;
3518 1 : case SPDK_SCSI_TASK_MGMT_RESP_REJECT:
3519 1 : rsph->response = ISCSI_TASK_FUNC_REJECTED;
3520 1 : break;
3521 1 : case SPDK_SCSI_TASK_MGMT_RESP_INVALID_LUN:
3522 1 : rsph->response = ISCSI_TASK_FUNC_RESP_LUN_NOT_EXIST;
3523 1 : break;
3524 0 : case SPDK_SCSI_TASK_MGMT_RESP_TARGET_FAILURE:
3525 0 : rsph->response = ISCSI_TASK_FUNC_REJECTED;
3526 0 : break;
3527 5 : case SPDK_SCSI_TASK_MGMT_RESP_REJECT_FUNC_NOT_SUPPORTED:
3528 5 : rsph->response = ISCSI_TASK_FUNC_RESP_FUNC_NOT_SUPPORTED;
3529 5 : break;
3530 : }
3531 7 : rsph->itt = reqh->itt;
3532 :
3533 7 : to_be32(&rsph->stat_sn, conn->StatSN);
3534 7 : conn->StatSN++;
3535 :
3536 7 : if (reqh->immediate == 0) {
3537 7 : conn->sess->MaxCmdSN++;
3538 : }
3539 :
3540 7 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
3541 7 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
3542 :
3543 7 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_pdu_generic_complete, NULL);
3544 : }
3545 :
3546 : static void
3547 0 : iscsi_queue_mgmt_task(struct spdk_iscsi_conn *conn, struct spdk_iscsi_task *task)
3548 : {
3549 : struct spdk_scsi_lun *lun;
3550 :
3551 0 : lun = spdk_scsi_dev_get_lun(conn->dev, task->lun_id);
3552 0 : if (lun == NULL) {
3553 0 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_INVALID_LUN;
3554 0 : iscsi_task_mgmt_response(conn, task);
3555 0 : iscsi_task_put(task);
3556 0 : return;
3557 : }
3558 :
3559 0 : spdk_scsi_dev_queue_mgmt_task(conn->dev, &task->scsi);
3560 : }
3561 :
3562 : static int
3563 0 : _iscsi_op_abort_task(void *arg)
3564 : {
3565 0 : struct spdk_iscsi_task *task = arg;
3566 : int rc;
3567 :
3568 0 : rc = iscsi_conn_abort_queued_datain_task(task->conn, task->scsi.abort_id);
3569 0 : if (rc != 0) {
3570 0 : return SPDK_POLLER_BUSY;
3571 : }
3572 :
3573 0 : spdk_poller_unregister(&task->mgmt_poller);
3574 0 : iscsi_queue_mgmt_task(task->conn, task);
3575 0 : return SPDK_POLLER_BUSY;
3576 : }
3577 :
3578 : static void
3579 0 : iscsi_op_abort_task(struct spdk_iscsi_task *task, uint32_t ref_task_tag)
3580 : {
3581 0 : task->scsi.abort_id = ref_task_tag;
3582 0 : task->scsi.function = SPDK_SCSI_TASK_FUNC_ABORT_TASK;
3583 0 : task->mgmt_poller = SPDK_POLLER_REGISTER(_iscsi_op_abort_task, task, 10);
3584 0 : }
3585 :
3586 : static int
3587 0 : _iscsi_op_abort_task_set(void *arg)
3588 : {
3589 0 : struct spdk_iscsi_task *task = arg;
3590 : int rc;
3591 :
3592 0 : rc = iscsi_conn_abort_queued_datain_tasks(task->conn, task->scsi.lun,
3593 : task->pdu);
3594 0 : if (rc != 0) {
3595 0 : return SPDK_POLLER_BUSY;
3596 : }
3597 :
3598 0 : spdk_poller_unregister(&task->mgmt_poller);
3599 0 : iscsi_queue_mgmt_task(task->conn, task);
3600 0 : return SPDK_POLLER_BUSY;
3601 : }
3602 :
3603 : void
3604 0 : iscsi_op_abort_task_set(struct spdk_iscsi_task *task, uint8_t function)
3605 : {
3606 0 : task->scsi.function = function;
3607 0 : task->mgmt_poller = SPDK_POLLER_REGISTER(_iscsi_op_abort_task_set, task, 10);
3608 0 : }
3609 :
3610 : static int
3611 8 : iscsi_pdu_hdr_op_task(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
3612 : {
3613 : struct iscsi_bhs_task_req *reqh;
3614 : uint64_t lun;
3615 : uint32_t task_tag;
3616 : uint32_t ref_task_tag;
3617 : uint8_t function;
3618 : int lun_i;
3619 : struct spdk_iscsi_task *task;
3620 : struct spdk_scsi_dev *dev;
3621 :
3622 8 : if (conn->sess->session_type != SESSION_TYPE_NORMAL) {
3623 1 : SPDK_ERRLOG("ISCSI_OP_TASK not allowed in discovery and invalid session\n");
3624 1 : return SPDK_ISCSI_CONNECTION_FATAL;
3625 : }
3626 :
3627 7 : reqh = (struct iscsi_bhs_task_req *)&pdu->bhs;
3628 7 : function = reqh->flags & ISCSI_TASK_FUNCTION_MASK;
3629 7 : lun = from_be64(&reqh->lun);
3630 7 : task_tag = from_be32(&reqh->itt);
3631 7 : ref_task_tag = from_be32(&reqh->ref_task_tag);
3632 :
3633 7 : SPDK_DEBUGLOG(iscsi, "I=%d, func=%d, ITT=%x, ref TT=%x, LUN=0x%16.16"PRIx64"\n",
3634 : reqh->immediate, function, task_tag, ref_task_tag, lun);
3635 :
3636 7 : SPDK_DEBUGLOG(iscsi, "StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n",
3637 : conn->StatSN, conn->sess->ExpCmdSN, conn->sess->MaxCmdSN);
3638 :
3639 7 : lun_i = spdk_scsi_lun_id_fmt_to_int(lun);
3640 7 : dev = conn->dev;
3641 :
3642 7 : task = iscsi_task_get(conn, NULL, iscsi_task_mgmt_cpl);
3643 7 : if (!task) {
3644 0 : SPDK_ERRLOG("Unable to acquire task\n");
3645 0 : return SPDK_ISCSI_CONNECTION_FATAL;
3646 : }
3647 :
3648 7 : iscsi_task_associate_pdu(task, pdu);
3649 7 : task->scsi.target_port = conn->target_port;
3650 7 : task->scsi.initiator_port = conn->initiator_port;
3651 7 : task->tag = task_tag;
3652 7 : task->scsi.lun = spdk_scsi_dev_get_lun(dev, lun_i);
3653 7 : task->lun_id = lun_i;
3654 :
3655 7 : if (task->scsi.lun == NULL) {
3656 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_INVALID_LUN;
3657 1 : iscsi_task_mgmt_response(conn, task);
3658 1 : iscsi_task_put(task);
3659 1 : return 0;
3660 : }
3661 :
3662 6 : switch (function) {
3663 : /* abort task identified by Referenced Task Tag field */
3664 0 : case ISCSI_TASK_FUNC_ABORT_TASK:
3665 0 : SPDK_NOTICELOG("ABORT_TASK\n");
3666 :
3667 0 : iscsi_del_transfer_task(conn, ref_task_tag);
3668 0 : iscsi_op_abort_task(task, ref_task_tag);
3669 0 : return 0;
3670 :
3671 : /* abort all tasks issued via this session on the LUN */
3672 0 : case ISCSI_TASK_FUNC_ABORT_TASK_SET:
3673 0 : SPDK_NOTICELOG("ABORT_TASK_SET\n");
3674 :
3675 0 : iscsi_clear_all_transfer_task(conn, task->scsi.lun, pdu);
3676 0 : iscsi_op_abort_task_set(task, SPDK_SCSI_TASK_FUNC_ABORT_TASK_SET);
3677 0 : return 0;
3678 :
3679 1 : case ISCSI_TASK_FUNC_CLEAR_TASK_SET:
3680 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_REJECT_FUNC_NOT_SUPPORTED;
3681 1 : SPDK_NOTICELOG("CLEAR_TASK_SET (Unsupported)\n");
3682 1 : break;
3683 :
3684 1 : case ISCSI_TASK_FUNC_CLEAR_ACA:
3685 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_REJECT_FUNC_NOT_SUPPORTED;
3686 1 : SPDK_NOTICELOG("CLEAR_ACA (Unsupported)\n");
3687 1 : break;
3688 :
3689 0 : case ISCSI_TASK_FUNC_LOGICAL_UNIT_RESET:
3690 0 : SPDK_NOTICELOG("LOGICAL_UNIT_RESET\n");
3691 :
3692 0 : iscsi_clear_all_transfer_task(conn, task->scsi.lun, pdu);
3693 0 : iscsi_op_abort_task_set(task, SPDK_SCSI_TASK_FUNC_LUN_RESET);
3694 0 : return 0;
3695 :
3696 1 : case ISCSI_TASK_FUNC_TARGET_WARM_RESET:
3697 1 : SPDK_NOTICELOG("TARGET_WARM_RESET (Unsupported)\n");
3698 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_REJECT_FUNC_NOT_SUPPORTED;
3699 1 : break;
3700 :
3701 1 : case ISCSI_TASK_FUNC_TARGET_COLD_RESET:
3702 1 : SPDK_NOTICELOG("TARGET_COLD_RESET (Unsupported)\n");
3703 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_REJECT_FUNC_NOT_SUPPORTED;
3704 1 : break;
3705 :
3706 1 : case ISCSI_TASK_FUNC_TASK_REASSIGN:
3707 1 : SPDK_NOTICELOG("TASK_REASSIGN (Unsupported)\n");
3708 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_REJECT_FUNC_NOT_SUPPORTED;
3709 1 : break;
3710 :
3711 1 : default:
3712 1 : SPDK_ERRLOG("unsupported function %d\n", function);
3713 1 : task->scsi.response = SPDK_SCSI_TASK_MGMT_RESP_REJECT;
3714 1 : break;
3715 : }
3716 :
3717 6 : iscsi_task_mgmt_response(conn, task);
3718 6 : iscsi_task_put(task);
3719 6 : return 0;
3720 : }
3721 :
3722 : static int
3723 4 : iscsi_pdu_hdr_op_nopout(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
3724 : {
3725 : struct iscsi_bhs_nop_out *reqh;
3726 : uint32_t task_tag;
3727 : uint32_t transfer_tag;
3728 : int I_bit;
3729 :
3730 4 : if (conn->sess->session_type == SESSION_TYPE_DISCOVERY) {
3731 1 : SPDK_ERRLOG("ISCSI_OP_NOPOUT not allowed in discovery session\n");
3732 1 : return SPDK_ISCSI_CONNECTION_FATAL;
3733 : }
3734 :
3735 3 : reqh = (struct iscsi_bhs_nop_out *)&pdu->bhs;
3736 3 : I_bit = reqh->immediate;
3737 :
3738 3 : if (pdu->data_segment_len > SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH) {
3739 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
3740 : }
3741 :
3742 2 : task_tag = from_be32(&reqh->itt);
3743 2 : transfer_tag = from_be32(&reqh->ttt);
3744 :
3745 2 : SPDK_DEBUGLOG(iscsi, "I=%d, ITT=%x, TTT=%x\n",
3746 : I_bit, task_tag, transfer_tag);
3747 :
3748 2 : SPDK_DEBUGLOG(iscsi, "CmdSN=%u, StatSN=%u, ExpCmdSN=%u, MaxCmdSN=%u\n",
3749 : pdu->cmd_sn, conn->StatSN, conn->sess->ExpCmdSN,
3750 : conn->sess->MaxCmdSN);
3751 :
3752 2 : if (transfer_tag != 0xFFFFFFFF && transfer_tag != (uint32_t)conn->id) {
3753 2 : SPDK_ERRLOG("invalid transfer tag 0x%x\n", transfer_tag);
3754 : /*
3755 : * Technically we should probably fail the connection here, but for now
3756 : * just print the error message and continue.
3757 : */
3758 : }
3759 :
3760 2 : if (task_tag == 0xffffffffU && I_bit == 0) {
3761 1 : SPDK_ERRLOG("got NOPOUT ITT=0xffffffff, I=0\n");
3762 1 : return SPDK_ISCSI_CONNECTION_FATAL;
3763 : }
3764 :
3765 1 : return 0;
3766 : }
3767 :
3768 : static int
3769 0 : iscsi_pdu_payload_op_nopout(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
3770 : {
3771 : struct spdk_iscsi_pdu *rsp_pdu;
3772 : struct iscsi_bhs_nop_out *reqh;
3773 : struct iscsi_bhs_nop_in *rsph;
3774 : uint8_t *data;
3775 : uint64_t lun;
3776 : uint32_t task_tag;
3777 : int I_bit;
3778 : int data_len;
3779 :
3780 0 : reqh = (struct iscsi_bhs_nop_out *)&pdu->bhs;
3781 0 : I_bit = reqh->immediate;
3782 :
3783 0 : data_len = pdu->data_segment_len;
3784 0 : if (data_len > conn->MaxRecvDataSegmentLength) {
3785 0 : data_len = conn->MaxRecvDataSegmentLength;
3786 : }
3787 :
3788 0 : lun = from_be64(&reqh->lun);
3789 0 : task_tag = from_be32(&reqh->itt);
3790 :
3791 : /*
3792 : * We don't actually check to see if this is a response to the NOP-In
3793 : * that we sent. Our goal is to just verify that the initiator is
3794 : * alive and responding to commands, not to verify that it tags
3795 : * NOP-Outs correctly
3796 : */
3797 0 : conn->nop_outstanding = false;
3798 :
3799 0 : if (task_tag == 0xffffffffU) {
3800 0 : assert(I_bit == 1);
3801 0 : SPDK_DEBUGLOG(iscsi, "got NOPOUT ITT=0xffffffff\n");
3802 0 : return 0;
3803 : }
3804 :
3805 0 : data = calloc(1, data_len);
3806 0 : if (!data) {
3807 0 : SPDK_ERRLOG("calloc() failed for ping data\n");
3808 0 : return SPDK_ISCSI_CONNECTION_FATAL;
3809 : }
3810 :
3811 : /* response of NOPOUT */
3812 0 : if (data_len > 0) {
3813 : /* copy ping data */
3814 0 : memcpy(data, pdu->data, data_len);
3815 : }
3816 :
3817 : /* response PDU */
3818 0 : rsp_pdu = iscsi_get_pdu(conn);
3819 0 : assert(rsp_pdu != NULL);
3820 :
3821 0 : rsph = (struct iscsi_bhs_nop_in *)&rsp_pdu->bhs;
3822 0 : rsp_pdu->data = data;
3823 0 : rsph->opcode = ISCSI_OP_NOPIN;
3824 0 : rsph->flags |= 0x80; /* bit 0 default to 1 */
3825 0 : DSET24(rsph->data_segment_len, data_len);
3826 0 : to_be64(&rsph->lun, lun);
3827 0 : to_be32(&rsph->itt, task_tag);
3828 0 : to_be32(&rsph->ttt, 0xffffffffU);
3829 :
3830 0 : to_be32(&rsph->stat_sn, conn->StatSN);
3831 0 : conn->StatSN++;
3832 :
3833 0 : if (I_bit == 0) {
3834 0 : conn->sess->MaxCmdSN++;
3835 : }
3836 :
3837 0 : to_be32(&rsph->exp_cmd_sn, conn->sess->ExpCmdSN);
3838 0 : to_be32(&rsph->max_cmd_sn, conn->sess->MaxCmdSN);
3839 :
3840 0 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_pdu_generic_complete, NULL);
3841 0 : conn->last_nopin = spdk_get_ticks();
3842 :
3843 0 : return 0;
3844 : }
3845 :
3846 : /* This function returns the spdk_scsi_task by searching the snack list via
3847 : * task transfertag and the pdu's opcode
3848 : */
3849 : static struct spdk_iscsi_task *
3850 0 : get_scsi_task_from_ttt(struct spdk_iscsi_conn *conn, uint32_t transfer_tag)
3851 : {
3852 : struct spdk_iscsi_pdu *pdu;
3853 : struct iscsi_bhs_data_in *datain_bhs;
3854 :
3855 0 : TAILQ_FOREACH(pdu, &conn->snack_pdu_list, tailq) {
3856 0 : if (pdu->bhs.opcode == ISCSI_OP_SCSI_DATAIN) {
3857 0 : datain_bhs = (struct iscsi_bhs_data_in *)&pdu->bhs;
3858 0 : if (from_be32(&datain_bhs->ttt) == transfer_tag) {
3859 0 : return pdu->task;
3860 : }
3861 : }
3862 : }
3863 :
3864 0 : return NULL;
3865 : }
3866 :
3867 : /* This function returns the spdk_scsi_task by searching the snack list via
3868 : * initiator task tag and the pdu's opcode
3869 : */
3870 : static struct spdk_iscsi_task *
3871 0 : get_scsi_task_from_itt(struct spdk_iscsi_conn *conn,
3872 : uint32_t task_tag, enum iscsi_op opcode)
3873 : {
3874 : struct spdk_iscsi_pdu *pdu;
3875 :
3876 0 : TAILQ_FOREACH(pdu, &conn->snack_pdu_list, tailq) {
3877 0 : if (pdu->bhs.opcode == opcode &&
3878 0 : pdu->task != NULL &&
3879 0 : pdu->task->tag == task_tag) {
3880 0 : return pdu->task;
3881 : }
3882 : }
3883 :
3884 0 : return NULL;
3885 : }
3886 :
3887 : /* This function is used to handle the r2t snack */
3888 : static int
3889 0 : iscsi_handle_r2t_snack(struct spdk_iscsi_conn *conn,
3890 : struct spdk_iscsi_task *task,
3891 : struct spdk_iscsi_pdu *pdu, uint32_t beg_run,
3892 : uint32_t run_length, int32_t task_tag)
3893 : {
3894 : int32_t last_r2tsn;
3895 : int i;
3896 :
3897 0 : if (beg_run < task->acked_r2tsn) {
3898 0 : SPDK_ERRLOG("ITT: 0x%08x, R2T SNACK requests retransmission of"
3899 : "R2TSN: from 0x%08x to 0x%08x. But it has already"
3900 : "ack to R2TSN:0x%08x, protocol error.\n",
3901 : task_tag, beg_run, (beg_run + run_length),
3902 : (task->acked_r2tsn - 1));
3903 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
3904 : }
3905 :
3906 0 : if (run_length) {
3907 0 : if ((beg_run + run_length) > task->R2TSN) {
3908 0 : SPDK_ERRLOG("ITT: 0x%08x, received R2T SNACK with"
3909 : "BegRun: 0x%08x, RunLength: 0x%08x, exceeds"
3910 : "current R2TSN: 0x%08x, protocol error.\n",
3911 : task_tag, beg_run, run_length,
3912 : task->R2TSN);
3913 :
3914 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_PDU_FIELD);
3915 : }
3916 0 : last_r2tsn = (beg_run + run_length);
3917 : } else {
3918 0 : last_r2tsn = task->R2TSN;
3919 : }
3920 :
3921 0 : for (i = beg_run; i < last_r2tsn; i++) {
3922 0 : if (iscsi_send_r2t_recovery(conn, task, i, false) < 0) {
3923 0 : SPDK_ERRLOG("The r2t_sn=%d of r2t_task=%p is not sent\n", i, task);
3924 : }
3925 : }
3926 0 : return 0;
3927 : }
3928 :
3929 : /* This function is used to recover the data in packet */
3930 : static int
3931 0 : iscsi_handle_recovery_datain(struct spdk_iscsi_conn *conn,
3932 : struct spdk_iscsi_task *task,
3933 : struct spdk_iscsi_pdu *pdu, uint32_t beg_run,
3934 : uint32_t run_length, uint32_t task_tag)
3935 : {
3936 : struct spdk_iscsi_pdu *old_pdu, *pdu_temp;
3937 : uint32_t i;
3938 : struct iscsi_bhs_data_in *datain_header;
3939 : uint32_t last_statsn;
3940 :
3941 0 : task = iscsi_task_get_primary(task);
3942 :
3943 0 : SPDK_DEBUGLOG(iscsi, "iscsi_handle_recovery_datain\n");
3944 :
3945 0 : if (beg_run < task->acked_data_sn) {
3946 0 : SPDK_ERRLOG("ITT: 0x%08x, DATA IN SNACK requests retransmission of"
3947 : "DATASN: from 0x%08x to 0x%08x but already acked to "
3948 : "DATASN: 0x%08x protocol error\n",
3949 : task_tag, beg_run,
3950 : (beg_run + run_length), (task->acked_data_sn - 1));
3951 :
3952 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
3953 : }
3954 :
3955 0 : if (run_length == 0) {
3956 : /* as the DataSN begins at 0 */
3957 0 : run_length = task->datain_datasn + 1;
3958 : }
3959 :
3960 0 : if ((beg_run + run_length - 1) > task->datain_datasn) {
3961 0 : SPDK_ERRLOG("Initiator requests BegRun: 0x%08x, RunLength:"
3962 : "0x%08x greater than maximum DataSN: 0x%08x.\n",
3963 : beg_run, run_length, task->datain_datasn);
3964 :
3965 0 : return -1;
3966 : } else {
3967 0 : last_statsn = beg_run + run_length - 1;
3968 : }
3969 :
3970 0 : for (i = beg_run; i <= last_statsn; i++) {
3971 0 : TAILQ_FOREACH_SAFE(old_pdu, &conn->snack_pdu_list, tailq, pdu_temp) {
3972 0 : if (old_pdu->bhs.opcode == ISCSI_OP_SCSI_DATAIN) {
3973 0 : datain_header = (struct iscsi_bhs_data_in *)&old_pdu->bhs;
3974 0 : if (from_be32(&datain_header->itt) == task_tag &&
3975 0 : from_be32(&datain_header->data_sn) == i) {
3976 0 : TAILQ_REMOVE(&conn->snack_pdu_list, old_pdu, tailq);
3977 0 : iscsi_conn_write_pdu(conn, old_pdu, old_pdu->cb_fn, old_pdu->cb_arg);
3978 0 : break;
3979 : }
3980 : }
3981 : }
3982 : }
3983 0 : return 0;
3984 : }
3985 :
3986 : /* This function is used to handle the status snack */
3987 : static int
3988 0 : iscsi_handle_status_snack(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
3989 : {
3990 : uint32_t beg_run;
3991 : uint32_t run_length;
3992 : struct iscsi_bhs_snack_req *reqh;
3993 : uint32_t i;
3994 : uint32_t last_statsn;
3995 : bool found_pdu;
3996 : struct spdk_iscsi_pdu *old_pdu;
3997 :
3998 0 : reqh = (struct iscsi_bhs_snack_req *)&pdu->bhs;
3999 0 : beg_run = from_be32(&reqh->beg_run);
4000 0 : run_length = from_be32(&reqh->run_len);
4001 :
4002 0 : SPDK_DEBUGLOG(iscsi, "beg_run=%d, run_length=%d, conn->StatSN="
4003 : "%d, conn->exp_statsn=%d\n", beg_run, run_length,
4004 : conn->StatSN, conn->exp_statsn);
4005 :
4006 0 : if (!beg_run) {
4007 0 : beg_run = conn->exp_statsn;
4008 0 : } else if (beg_run < conn->exp_statsn) {
4009 0 : SPDK_ERRLOG("Got Status SNACK Begrun: 0x%08x, RunLength: 0x%08x "
4010 : "but already got ExpStatSN: 0x%08x on CID:%hu.\n",
4011 : beg_run, run_length, conn->StatSN, conn->cid);
4012 :
4013 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_PDU_FIELD);
4014 : }
4015 :
4016 0 : last_statsn = (!run_length) ? conn->StatSN : (beg_run + run_length);
4017 :
4018 0 : for (i = beg_run; i < last_statsn; i++) {
4019 0 : found_pdu = false;
4020 0 : TAILQ_FOREACH(old_pdu, &conn->snack_pdu_list, tailq) {
4021 0 : if (from_be32(&old_pdu->bhs.stat_sn) == i) {
4022 0 : found_pdu = true;
4023 0 : break;
4024 : }
4025 : }
4026 :
4027 0 : if (!found_pdu) {
4028 0 : SPDK_ERRLOG("Unable to find StatSN: 0x%08x. For a Status"
4029 : "SNACK, assuming this is a proactive SNACK "
4030 : "for an untransmitted StatSN, ignoring.\n",
4031 : beg_run);
4032 : } else {
4033 0 : TAILQ_REMOVE(&conn->snack_pdu_list, old_pdu, tailq);
4034 0 : iscsi_conn_write_pdu(conn, old_pdu, old_pdu->cb_fn, old_pdu->cb_arg);
4035 : }
4036 : }
4037 :
4038 0 : return 0;
4039 : }
4040 :
4041 : /* This function is used to handle the data ack snack */
4042 : static int
4043 0 : iscsi_handle_data_ack(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4044 : {
4045 : uint32_t transfer_tag;
4046 : uint32_t beg_run;
4047 : uint32_t run_length;
4048 : struct spdk_iscsi_pdu *old_pdu;
4049 : uint32_t old_datasn;
4050 : struct iscsi_bhs_snack_req *reqh;
4051 : struct spdk_iscsi_task *task;
4052 : struct iscsi_bhs_data_in *datain_header;
4053 : struct spdk_iscsi_task *primary;
4054 :
4055 0 : reqh = (struct iscsi_bhs_snack_req *)&pdu->bhs;
4056 0 : transfer_tag = from_be32(&reqh->ttt);
4057 0 : beg_run = from_be32(&reqh->beg_run);
4058 0 : run_length = from_be32(&reqh->run_len);
4059 0 : task = NULL;
4060 0 : datain_header = NULL;
4061 :
4062 0 : SPDK_DEBUGLOG(iscsi, "beg_run=%d,transfer_tag=%d,run_len=%d\n",
4063 : beg_run, transfer_tag, run_length);
4064 :
4065 0 : task = get_scsi_task_from_ttt(conn, transfer_tag);
4066 0 : if (!task) {
4067 0 : SPDK_ERRLOG("Data ACK SNACK for TTT: 0x%08x is invalid.\n",
4068 : transfer_tag);
4069 0 : goto reject_return;
4070 : }
4071 :
4072 0 : primary = iscsi_task_get_primary(task);
4073 0 : if ((run_length != 0) || (beg_run < primary->acked_data_sn)) {
4074 0 : SPDK_ERRLOG("TTT: 0x%08x Data ACK SNACK BegRUN: %d is less than "
4075 : "the next expected acked DataSN: %d\n",
4076 : transfer_tag, beg_run, primary->acked_data_sn);
4077 0 : goto reject_return;
4078 : }
4079 :
4080 0 : primary->acked_data_sn = beg_run;
4081 :
4082 : /* To free the pdu */
4083 0 : TAILQ_FOREACH(old_pdu, &conn->snack_pdu_list, tailq) {
4084 0 : if (old_pdu->bhs.opcode == ISCSI_OP_SCSI_DATAIN) {
4085 0 : datain_header = (struct iscsi_bhs_data_in *) &old_pdu->bhs;
4086 0 : old_datasn = from_be32(&datain_header->data_sn);
4087 0 : if ((from_be32(&datain_header->ttt) == transfer_tag) &&
4088 0 : (old_datasn == beg_run - 1)) {
4089 0 : TAILQ_REMOVE(&conn->snack_pdu_list, old_pdu, tailq);
4090 0 : iscsi_conn_free_pdu(conn, old_pdu);
4091 0 : break;
4092 : }
4093 : }
4094 : }
4095 :
4096 0 : SPDK_DEBUGLOG(iscsi, "Received Data ACK SNACK for TTT: 0x%08x,"
4097 : " updated acked DataSN to 0x%08x.\n", transfer_tag,
4098 : (task->acked_data_sn - 1));
4099 :
4100 0 : return 0;
4101 :
4102 0 : reject_return:
4103 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_SNACK);
4104 : }
4105 :
4106 : /* This function is used to handle the snack request from the initiator */
4107 : static int
4108 0 : iscsi_pdu_hdr_op_snack(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4109 : {
4110 : struct iscsi_bhs_snack_req *reqh;
4111 : struct spdk_iscsi_task *task;
4112 : int type;
4113 : uint32_t task_tag;
4114 : uint32_t beg_run;
4115 : uint32_t run_length;
4116 : int rc;
4117 :
4118 0 : if (conn->sess->session_type == SESSION_TYPE_DISCOVERY) {
4119 0 : SPDK_ERRLOG("ISCSI_OP_SNACK not allowed in discovery session\n");
4120 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4121 : }
4122 :
4123 0 : reqh = (struct iscsi_bhs_snack_req *)&pdu->bhs;
4124 0 : if (!conn->sess->ErrorRecoveryLevel) {
4125 0 : SPDK_ERRLOG("Got a SNACK request in ErrorRecoveryLevel=0\n");
4126 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4127 : }
4128 :
4129 0 : type = reqh->flags & ISCSI_FLAG_SNACK_TYPE_MASK;
4130 0 : SPDK_DEBUGLOG(iscsi, "The value of type is %d\n", type);
4131 :
4132 0 : switch (type) {
4133 0 : case 0:
4134 0 : reqh = (struct iscsi_bhs_snack_req *)&pdu->bhs;
4135 0 : task_tag = from_be32(&reqh->itt);
4136 0 : beg_run = from_be32(&reqh->beg_run);
4137 0 : run_length = from_be32(&reqh->run_len);
4138 :
4139 0 : SPDK_DEBUGLOG(iscsi, "beg_run=%d, run_length=%d, "
4140 : "task_tag=%x, transfer_tag=%u\n", beg_run,
4141 : run_length, task_tag, from_be32(&reqh->ttt));
4142 :
4143 0 : task = get_scsi_task_from_itt(conn, task_tag,
4144 : ISCSI_OP_SCSI_DATAIN);
4145 0 : if (task) {
4146 0 : return iscsi_handle_recovery_datain(conn, task, pdu,
4147 : beg_run, run_length, task_tag);
4148 : }
4149 0 : task = get_scsi_task_from_itt(conn, task_tag, ISCSI_OP_R2T);
4150 0 : if (task) {
4151 0 : return iscsi_handle_r2t_snack(conn, task, pdu, beg_run,
4152 : run_length, task_tag);
4153 : }
4154 0 : SPDK_ERRLOG("It is Neither datain nor r2t recovery request\n");
4155 0 : rc = -1;
4156 0 : break;
4157 0 : case ISCSI_FLAG_SNACK_TYPE_STATUS:
4158 0 : rc = iscsi_handle_status_snack(conn, pdu);
4159 0 : break;
4160 0 : case ISCSI_FLAG_SNACK_TYPE_DATA_ACK:
4161 0 : rc = iscsi_handle_data_ack(conn, pdu);
4162 0 : break;
4163 0 : case ISCSI_FLAG_SNACK_TYPE_RDATA:
4164 0 : SPDK_ERRLOG("R-Data SNACK is Not Supported int spdk\n");
4165 0 : rc = iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4166 0 : break;
4167 0 : default:
4168 0 : SPDK_ERRLOG("Unknown SNACK type %d, protocol error\n", type);
4169 0 : rc = iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4170 0 : break;
4171 : }
4172 :
4173 0 : return rc;
4174 : }
4175 :
4176 : static inline uint32_t
4177 47 : iscsi_get_mobj_max_data_len(struct spdk_mobj *mobj)
4178 : {
4179 47 : if (mobj->mp == g_iscsi.pdu_immediate_data_pool) {
4180 0 : return iscsi_get_max_immediate_data_size();
4181 : } else {
4182 47 : return SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH;
4183 : }
4184 : }
4185 :
4186 : static int
4187 22 : iscsi_pdu_hdr_op_data(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4188 : {
4189 : struct spdk_iscsi_task *task;
4190 : struct iscsi_bhs_data_out *reqh;
4191 : struct spdk_scsi_lun *lun_dev;
4192 : struct spdk_mobj *mobj;
4193 : uint32_t transfer_tag;
4194 : uint32_t task_tag;
4195 : uint32_t transfer_len;
4196 : uint32_t DataSN;
4197 : uint32_t buffer_offset;
4198 : uint32_t len;
4199 : uint32_t current_desired_data_transfer_length;
4200 : int F_bit;
4201 : int rc;
4202 :
4203 22 : if (conn->sess->session_type == SESSION_TYPE_DISCOVERY) {
4204 1 : SPDK_ERRLOG("ISCSI_OP_SCSI_DATAOUT not allowed in discovery session\n");
4205 1 : return SPDK_ISCSI_CONNECTION_FATAL;
4206 : }
4207 :
4208 21 : reqh = (struct iscsi_bhs_data_out *)&pdu->bhs;
4209 21 : F_bit = !!(reqh->flags & ISCSI_FLAG_FINAL);
4210 21 : transfer_tag = from_be32(&reqh->ttt);
4211 21 : task_tag = from_be32(&reqh->itt);
4212 21 : DataSN = from_be32(&reqh->data_sn);
4213 21 : buffer_offset = from_be32(&reqh->buffer_offset);
4214 :
4215 21 : if (pdu->data_segment_len > SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH) {
4216 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4217 : }
4218 :
4219 20 : task = get_transfer_task(conn, transfer_tag);
4220 20 : if (task == NULL) {
4221 1 : SPDK_ERRLOG("Not found task for transfer_tag=%x\n", transfer_tag);
4222 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_PDU_FIELD);
4223 : }
4224 :
4225 19 : lun_dev = spdk_scsi_dev_get_lun(conn->dev, task->lun_id);
4226 19 : current_desired_data_transfer_length = task->desired_data_transfer_length;
4227 :
4228 19 : if (pdu->data_segment_len > task->desired_data_transfer_length) {
4229 2 : SPDK_ERRLOG("the dataout pdu data length is larger than the value sent by R2T PDU\n");
4230 2 : return SPDK_ISCSI_CONNECTION_FATAL;
4231 : }
4232 :
4233 17 : if (task->tag != task_tag) {
4234 1 : SPDK_ERRLOG("The r2t task tag is %u, and the dataout task tag is %u\n",
4235 : task->tag, task_tag);
4236 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_PDU_FIELD);
4237 : }
4238 :
4239 16 : if (DataSN != task->r2t_datasn) {
4240 1 : SPDK_ERRLOG("DataSN(%u) exp=%d error\n", DataSN, task->r2t_datasn);
4241 1 : if (conn->sess->ErrorRecoveryLevel >= 1) {
4242 0 : rc = iscsi_send_r2t_recovery(conn, task, task->acked_r2tsn, true);
4243 0 : if (rc == 0) {
4244 0 : return 0;
4245 : }
4246 : }
4247 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4248 : }
4249 :
4250 15 : if (buffer_offset != task->next_expected_r2t_offset) {
4251 1 : SPDK_ERRLOG("offset(%u) error\n", buffer_offset);
4252 1 : return SPDK_ISCSI_CONNECTION_FATAL;
4253 : }
4254 :
4255 14 : transfer_len = task->scsi.transfer_len;
4256 14 : task->current_r2t_length += pdu->data_segment_len;
4257 14 : task->next_expected_r2t_offset += pdu->data_segment_len;
4258 14 : task->r2t_datasn++;
4259 :
4260 14 : if (task->current_r2t_length > conn->sess->MaxBurstLength) {
4261 1 : SPDK_ERRLOG("R2T burst(%u) > MaxBurstLength(%u)\n",
4262 : task->current_r2t_length,
4263 : conn->sess->MaxBurstLength);
4264 1 : return SPDK_ISCSI_CONNECTION_FATAL;
4265 : }
4266 :
4267 13 : if (F_bit) {
4268 : /*
4269 : * This R2T burst is done. Clear the length before we
4270 : * receive a PDU for the next R2t burst.
4271 : */
4272 3 : task->current_r2t_length = 0;
4273 : }
4274 :
4275 13 : if (task->next_expected_r2t_offset == transfer_len) {
4276 2 : task->acked_r2tsn++;
4277 11 : } else if (F_bit && (task->next_r2t_offset < transfer_len)) {
4278 1 : task->acked_r2tsn++;
4279 1 : len = spdk_min(conn->sess->MaxBurstLength,
4280 : (transfer_len - task->next_r2t_offset));
4281 1 : rc = iscsi_send_r2t(conn, task, task->next_r2t_offset, len,
4282 : task->ttt, &task->R2TSN);
4283 1 : if (rc < 0) {
4284 0 : SPDK_ERRLOG("iscsi_send_r2t() failed\n");
4285 : }
4286 1 : task->next_r2t_offset += len;
4287 : }
4288 :
4289 13 : if (lun_dev == NULL) {
4290 1 : SPDK_DEBUGLOG(iscsi, "LUN %d is removed, reject this PDU.\n",
4291 : task->lun_id);
4292 1 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4293 12 : } else if (spdk_unlikely(spdk_scsi_lun_get_dif_ctx(lun_dev, &task->scsi, &pdu->dif_ctx))) {
4294 0 : pdu->dif_insert_or_strip = true;
4295 : }
4296 :
4297 12 : mobj = iscsi_task_get_mobj(task);
4298 12 : if (mobj == NULL) {
4299 3 : if (!pdu->dif_insert_or_strip) {
4300 : /* More Data-OUT PDUs may follow. Increase the buffer size up to
4301 : * SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH to merge them into a
4302 : * single subtask.
4303 : */
4304 3 : pdu->data_buf_len = spdk_min(current_desired_data_transfer_length,
4305 : SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
4306 : }
4307 : } else {
4308 : /* Set up the data buffer from the one saved by the primary task. */
4309 9 : pdu->mobj[0] = mobj;
4310 9 : pdu->data = (void *)((uint64_t)mobj->buf + mobj->data_len);
4311 9 : pdu->data_from_mempool = true;
4312 9 : pdu->data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(iscsi_get_mobj_max_data_len(mobj));
4313 :
4314 9 : iscsi_task_set_mobj(task, NULL);
4315 : }
4316 :
4317 12 : return 0;
4318 : }
4319 :
4320 : static int
4321 10 : iscsi_pdu_payload_op_data(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4322 : {
4323 : struct spdk_iscsi_task *task;
4324 : struct iscsi_bhs_data_out *reqh;
4325 : struct spdk_mobj *mobj;
4326 : uint32_t transfer_tag;
4327 : int F_bit;
4328 : int rc;
4329 :
4330 10 : reqh = (struct iscsi_bhs_data_out *)&pdu->bhs;
4331 10 : F_bit = !!(reqh->flags & ISCSI_FLAG_FINAL);
4332 10 : transfer_tag = from_be32(&reqh->ttt);
4333 :
4334 10 : task = get_transfer_task(conn, transfer_tag);
4335 10 : if (spdk_unlikely(task == NULL)) {
4336 0 : SPDK_ERRLOG("Not found for transfer_tag=%x\n", transfer_tag);
4337 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_INVALID_PDU_FIELD);
4338 : }
4339 :
4340 10 : if (spdk_scsi_dev_get_lun(conn->dev, task->lun_id) == NULL) {
4341 0 : SPDK_DEBUGLOG(iscsi, "LUN %d is removed, reject this PDU.\n",
4342 : task->lun_id);
4343 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4344 : }
4345 :
4346 : /* If current PDU is final in a sequence, submit all received data,
4347 : * otherwise, continue aggregation until the first data buffer is full.
4348 : * We do not use SGL and instead create a subtask per data buffer. Hence further
4349 : * aggregation does not improve any performance.
4350 : */
4351 10 : mobj = pdu->mobj[0];
4352 10 : assert(mobj != NULL);
4353 :
4354 10 : if (F_bit || mobj->data_len >= SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH ||
4355 7 : pdu->dif_insert_or_strip) {
4356 3 : rc = iscsi_submit_write_subtask(conn, task, pdu, mobj);
4357 3 : if (rc != 0) {
4358 0 : return rc;
4359 : }
4360 : } else {
4361 7 : assert(pdu->mobj[1] == NULL);
4362 7 : iscsi_task_set_mobj(task, mobj);
4363 7 : pdu->mobj[0] = NULL;
4364 7 : return 0;
4365 : }
4366 :
4367 3 : mobj = pdu->mobj[1];
4368 3 : if (mobj == NULL) {
4369 1 : return 0;
4370 : }
4371 :
4372 2 : assert(pdu->dif_insert_or_strip == false);
4373 2 : assert(mobj->data_len < SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
4374 :
4375 2 : if (F_bit) {
4376 1 : return iscsi_submit_write_subtask(conn, task, pdu, mobj);
4377 : } else {
4378 1 : iscsi_task_set_mobj(task, mobj);
4379 1 : pdu->mobj[1] = NULL;
4380 1 : return 0;
4381 : }
4382 : }
4383 :
4384 : static void
4385 0 : init_login_reject_response(struct spdk_iscsi_pdu *pdu, struct spdk_iscsi_pdu *rsp_pdu)
4386 : {
4387 : struct iscsi_bhs_login_rsp *rsph;
4388 :
4389 0 : memset(rsp_pdu, 0, sizeof(struct spdk_iscsi_pdu));
4390 0 : rsph = (struct iscsi_bhs_login_rsp *)&rsp_pdu->bhs;
4391 0 : rsph->version_max = ISCSI_VERSION;
4392 0 : rsph->version_act = ISCSI_VERSION;
4393 0 : rsph->opcode = ISCSI_OP_LOGIN_RSP;
4394 0 : rsph->status_class = ISCSI_CLASS_INITIATOR_ERROR;
4395 0 : rsph->status_detail = ISCSI_LOGIN_INVALID_LOGIN_REQUEST;
4396 0 : rsph->itt = pdu->bhs.itt;
4397 0 : }
4398 :
4399 : static void
4400 0 : iscsi_pdu_dump(struct spdk_iscsi_pdu *pdu)
4401 : {
4402 0 : spdk_log_dump(stderr, "PDU", (uint8_t *)&pdu->bhs, ISCSI_BHS_LEN);
4403 0 : }
4404 :
4405 : /* This function is used to refree the pdu when it is acknowledged */
4406 : static void
4407 0 : remove_acked_pdu(struct spdk_iscsi_conn *conn, uint32_t ExpStatSN)
4408 : {
4409 : struct spdk_iscsi_pdu *pdu, *pdu_temp;
4410 : uint32_t stat_sn;
4411 :
4412 0 : conn->exp_statsn = spdk_min(ExpStatSN, conn->StatSN);
4413 0 : TAILQ_FOREACH_SAFE(pdu, &conn->snack_pdu_list, tailq, pdu_temp) {
4414 0 : stat_sn = from_be32(&pdu->bhs.stat_sn);
4415 0 : if (spdk_sn32_lt(stat_sn, conn->exp_statsn)) {
4416 0 : TAILQ_REMOVE(&conn->snack_pdu_list, pdu, tailq);
4417 0 : iscsi_conn_free_pdu(conn, pdu);
4418 : }
4419 : }
4420 0 : }
4421 :
4422 : static int
4423 14 : iscsi_update_cmdsn(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4424 : {
4425 : int opcode;
4426 : uint32_t ExpStatSN;
4427 : int I_bit;
4428 : struct spdk_iscsi_sess *sess;
4429 : struct iscsi_bhs_scsi_req *reqh;
4430 :
4431 14 : sess = conn->sess;
4432 14 : if (!sess) {
4433 0 : SPDK_ERRLOG("Connection has no associated session!\n");
4434 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4435 : }
4436 :
4437 14 : opcode = pdu->bhs.opcode;
4438 14 : reqh = (struct iscsi_bhs_scsi_req *)&pdu->bhs;
4439 :
4440 14 : pdu->cmd_sn = from_be32(&reqh->cmd_sn);
4441 :
4442 14 : I_bit = reqh->immediate;
4443 14 : if (I_bit == 0) {
4444 21 : if (spdk_sn32_lt(pdu->cmd_sn, sess->ExpCmdSN) ||
4445 7 : spdk_sn32_gt(pdu->cmd_sn, sess->MaxCmdSN)) {
4446 7 : if (sess->session_type == SESSION_TYPE_NORMAL &&
4447 : opcode != ISCSI_OP_SCSI_DATAOUT) {
4448 0 : SPDK_ERRLOG("CmdSN(%u) ignore (ExpCmdSN=%u, MaxCmdSN=%u)\n",
4449 : pdu->cmd_sn, sess->ExpCmdSN, sess->MaxCmdSN);
4450 :
4451 0 : if (sess->ErrorRecoveryLevel >= 1) {
4452 0 : SPDK_DEBUGLOG(iscsi, "Skip the error in ERL 1 and 2\n");
4453 : } else {
4454 0 : return SPDK_PDU_FATAL;
4455 : }
4456 : }
4457 : }
4458 0 : } else if (pdu->cmd_sn != sess->ExpCmdSN) {
4459 0 : SPDK_ERRLOG("CmdSN(%u) error ExpCmdSN=%u\n", pdu->cmd_sn, sess->ExpCmdSN);
4460 :
4461 0 : if (sess->ErrorRecoveryLevel >= 1) {
4462 0 : SPDK_DEBUGLOG(iscsi, "Skip the error in ERL 1 and 2\n");
4463 0 : } else if (opcode != ISCSI_OP_NOPOUT) {
4464 : /*
4465 : * The Linux initiator does not send valid CmdSNs for
4466 : * nopout under heavy load, so do not close the
4467 : * connection in that case.
4468 : */
4469 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4470 : }
4471 : }
4472 :
4473 14 : ExpStatSN = from_be32(&reqh->exp_stat_sn);
4474 14 : if (spdk_sn32_gt(ExpStatSN, conn->StatSN)) {
4475 0 : SPDK_DEBUGLOG(iscsi, "StatSN(%u) advanced\n", ExpStatSN);
4476 0 : ExpStatSN = conn->StatSN;
4477 : }
4478 :
4479 14 : if (sess->ErrorRecoveryLevel >= 1) {
4480 0 : remove_acked_pdu(conn, ExpStatSN);
4481 : }
4482 :
4483 14 : if (!I_bit && opcode != ISCSI_OP_SCSI_DATAOUT) {
4484 3 : sess->ExpCmdSN++;
4485 : }
4486 :
4487 14 : return 0;
4488 : }
4489 :
4490 : static int
4491 14 : iscsi_pdu_hdr_handle(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4492 : {
4493 : int opcode;
4494 : int rc;
4495 14 : struct spdk_iscsi_pdu *rsp_pdu = NULL;
4496 :
4497 14 : if (pdu == NULL) {
4498 0 : return -1;
4499 : }
4500 :
4501 14 : opcode = pdu->bhs.opcode;
4502 :
4503 14 : SPDK_DEBUGLOG(iscsi, "opcode %x\n", opcode);
4504 :
4505 14 : if (opcode == ISCSI_OP_LOGIN) {
4506 0 : return iscsi_pdu_hdr_op_login(conn, pdu);
4507 : }
4508 :
4509 : /* connection in login phase but receive non-login opcode
4510 : * return response code 0x020b to initiator.
4511 : * */
4512 14 : if (!conn->full_feature && conn->state == ISCSI_CONN_STATE_RUNNING) {
4513 0 : rsp_pdu = iscsi_get_pdu(conn);
4514 0 : if (rsp_pdu == NULL) {
4515 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4516 : }
4517 0 : init_login_reject_response(pdu, rsp_pdu);
4518 0 : iscsi_conn_write_pdu(conn, rsp_pdu, iscsi_conn_pdu_generic_complete, NULL);
4519 0 : SPDK_ERRLOG("Received opcode %d in login phase\n", opcode);
4520 0 : return SPDK_ISCSI_LOGIN_ERROR_RESPONSE;
4521 14 : } else if (conn->state == ISCSI_CONN_STATE_INVALID) {
4522 0 : SPDK_ERRLOG("before Full Feature\n");
4523 0 : iscsi_pdu_dump(pdu);
4524 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4525 : }
4526 :
4527 14 : rc = iscsi_update_cmdsn(conn, pdu);
4528 14 : if (rc != 0) {
4529 0 : return rc;
4530 : }
4531 :
4532 14 : switch (opcode) {
4533 0 : case ISCSI_OP_NOPOUT:
4534 0 : rc = iscsi_pdu_hdr_op_nopout(conn, pdu);
4535 0 : break;
4536 :
4537 2 : case ISCSI_OP_SCSI:
4538 2 : rc = iscsi_pdu_hdr_op_scsi(conn, pdu);
4539 2 : break;
4540 0 : case ISCSI_OP_TASK:
4541 0 : rc = iscsi_pdu_hdr_op_task(conn, pdu);
4542 0 : break;
4543 :
4544 1 : case ISCSI_OP_TEXT:
4545 1 : rc = iscsi_pdu_hdr_op_text(conn, pdu);
4546 1 : break;
4547 :
4548 0 : case ISCSI_OP_LOGOUT:
4549 0 : rc = iscsi_pdu_hdr_op_logout(conn, pdu);
4550 0 : break;
4551 :
4552 11 : case ISCSI_OP_SCSI_DATAOUT:
4553 11 : rc = iscsi_pdu_hdr_op_data(conn, pdu);
4554 11 : break;
4555 :
4556 0 : case ISCSI_OP_SNACK:
4557 0 : rc = iscsi_pdu_hdr_op_snack(conn, pdu);
4558 0 : break;
4559 :
4560 0 : default:
4561 0 : SPDK_ERRLOG("unsupported opcode %x\n", opcode);
4562 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4563 : }
4564 :
4565 14 : if (rc < 0) {
4566 1 : SPDK_ERRLOG("processing PDU header (opcode=%x) failed on %s(%s)\n",
4567 : opcode,
4568 : conn->target_port != NULL ? spdk_scsi_port_get_name(conn->target_port) : "NULL",
4569 : conn->initiator_port != NULL ? spdk_scsi_port_get_name(conn->initiator_port) : "NULL");
4570 : }
4571 :
4572 14 : return rc;
4573 : }
4574 :
4575 : static int
4576 13 : iscsi_pdu_payload_handle(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4577 : {
4578 : int opcode;
4579 13 : int rc = 0;
4580 :
4581 13 : opcode = pdu->bhs.opcode;
4582 :
4583 13 : SPDK_DEBUGLOG(iscsi, "opcode %x\n", opcode);
4584 :
4585 13 : switch (opcode) {
4586 0 : case ISCSI_OP_LOGIN:
4587 0 : rc = iscsi_pdu_payload_op_login(conn, pdu);
4588 0 : break;
4589 0 : case ISCSI_OP_NOPOUT:
4590 0 : rc = iscsi_pdu_payload_op_nopout(conn, pdu);
4591 0 : break;
4592 2 : case ISCSI_OP_SCSI:
4593 2 : rc = iscsi_pdu_payload_op_scsi(conn, pdu);
4594 2 : break;
4595 0 : case ISCSI_OP_TASK:
4596 0 : break;
4597 1 : case ISCSI_OP_TEXT:
4598 1 : rc = iscsi_pdu_payload_op_text(conn, pdu);
4599 1 : break;
4600 0 : case ISCSI_OP_LOGOUT:
4601 0 : break;
4602 10 : case ISCSI_OP_SCSI_DATAOUT:
4603 10 : rc = iscsi_pdu_payload_op_data(conn, pdu);
4604 10 : break;
4605 0 : case ISCSI_OP_SNACK:
4606 0 : break;
4607 0 : default:
4608 0 : SPDK_ERRLOG("unsupported opcode %x\n", opcode);
4609 0 : return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
4610 : }
4611 :
4612 13 : if (rc < 0) {
4613 0 : SPDK_ERRLOG("processing PDU payload (opcode=%x) failed on %s(%s)\n",
4614 : opcode,
4615 : conn->target_port != NULL ? spdk_scsi_port_get_name(conn->target_port) : "NULL",
4616 : conn->initiator_port != NULL ? spdk_scsi_port_get_name(conn->initiator_port) : "NULL");
4617 : }
4618 :
4619 13 : return rc;
4620 : }
4621 :
4622 : /* Return zero if completed to read payload, positive number if still in progress,
4623 : * or negative number if any error.
4624 : */
4625 : static int
4626 19 : iscsi_pdu_payload_read(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
4627 : {
4628 : struct spdk_mempool *pool;
4629 : struct spdk_mobj *mobj;
4630 : uint32_t data_len;
4631 : uint32_t read_len;
4632 : uint32_t crc32c;
4633 : int rc;
4634 : uint32_t data_buf_len;
4635 :
4636 19 : data_len = pdu->data_segment_len;
4637 19 : read_len = data_len - pdu->data_valid_bytes;
4638 19 : data_buf_len = pdu->data_buf_len;
4639 :
4640 19 : mobj = pdu->mobj[0];
4641 19 : if (mobj == NULL) {
4642 5 : if (data_buf_len <= iscsi_get_max_immediate_data_size()) {
4643 1 : pool = g_iscsi.pdu_immediate_data_pool;
4644 1 : data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(iscsi_get_max_immediate_data_size());
4645 4 : } else if (data_buf_len <= SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH) {
4646 3 : pool = g_iscsi.pdu_data_out_pool;
4647 3 : data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
4648 : } else {
4649 1 : SPDK_ERRLOG("Data(%d) > MaxSegment(%d)\n",
4650 : data_len, SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
4651 1 : return -1;
4652 : }
4653 4 : mobj = iscsi_datapool_get(pool);
4654 4 : if (mobj == NULL) {
4655 0 : return 1;
4656 : }
4657 :
4658 4 : pdu->data_buf_len = data_buf_len;
4659 :
4660 4 : pdu->mobj[0] = mobj;
4661 4 : pdu->data = mobj->buf;
4662 4 : pdu->data_from_mempool = true;
4663 14 : } else if (mobj->data_len == iscsi_get_mobj_max_data_len(mobj) && read_len > 0) {
4664 3 : mobj = pdu->mobj[1];
4665 3 : if (mobj == NULL) {
4666 : /* The first data buffer just ran out. Allocate the second data buffer and
4667 : * continue reading the data segment.
4668 : */
4669 3 : assert(pdu->data_from_mempool == true);
4670 3 : assert(!pdu->dif_insert_or_strip);
4671 :
4672 3 : if (conn->data_digest) {
4673 0 : iscsi_pdu_calc_partial_data_digest(pdu);
4674 : }
4675 3 : mobj = iscsi_datapool_get(g_iscsi.pdu_data_out_pool);
4676 3 : if (mobj == NULL) {
4677 0 : return 1;
4678 : }
4679 3 : pdu->mobj[1] = mobj;
4680 3 : pdu->data = mobj->buf;
4681 3 : pdu->data_offset = pdu->data_valid_bytes;
4682 3 : pdu->data_buf_len = SPDK_BDEV_BUF_SIZE_WITH_MD(SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH);
4683 : }
4684 : }
4685 :
4686 : /* copy the actual data into local buffer */
4687 18 : read_len = spdk_min(read_len, iscsi_get_mobj_max_data_len(mobj) - mobj->data_len);
4688 :
4689 18 : if (read_len > 0) {
4690 17 : rc = iscsi_conn_read_data_segment(conn,
4691 : pdu,
4692 17 : pdu->data_valid_bytes - pdu->data_offset,
4693 : read_len);
4694 17 : if (rc < 0) {
4695 0 : return rc;
4696 : }
4697 :
4698 17 : mobj->data_len += rc;
4699 17 : pdu->data_valid_bytes += rc;
4700 17 : if (pdu->data_valid_bytes < data_len) {
4701 3 : return 1;
4702 : }
4703 : }
4704 :
4705 : /* copy out the data digest */
4706 15 : if (conn->data_digest &&
4707 1 : pdu->ddigest_valid_bytes < ISCSI_DIGEST_LEN) {
4708 1 : rc = iscsi_conn_read_data(conn,
4709 1 : ISCSI_DIGEST_LEN - pdu->ddigest_valid_bytes,
4710 1 : pdu->data_digest + pdu->ddigest_valid_bytes);
4711 1 : if (rc < 0) {
4712 0 : return rc;
4713 : }
4714 :
4715 1 : pdu->ddigest_valid_bytes += rc;
4716 1 : if (pdu->ddigest_valid_bytes < ISCSI_DIGEST_LEN) {
4717 0 : return 1;
4718 : }
4719 : }
4720 :
4721 : /* check data digest */
4722 15 : if (conn->data_digest) {
4723 1 : iscsi_pdu_calc_partial_data_digest(pdu);
4724 1 : crc32c = iscsi_pdu_calc_partial_data_digest_done(pdu);
4725 :
4726 1 : rc = MATCH_DIGEST_WORD(pdu->data_digest, crc32c);
4727 1 : if (rc == 0) {
4728 0 : SPDK_ERRLOG("data digest error (%s)\n", conn->initiator_name);
4729 0 : return -1;
4730 : }
4731 : }
4732 :
4733 15 : return 0;
4734 : }
4735 :
4736 : static int
4737 0 : iscsi_read_pdu(struct spdk_iscsi_conn *conn)
4738 : {
4739 : enum iscsi_pdu_recv_state prev_state;
4740 : struct spdk_iscsi_pdu *pdu;
4741 : uint32_t crc32c;
4742 : int ahs_len;
4743 : int rc;
4744 :
4745 : do {
4746 0 : prev_state = conn->pdu_recv_state;
4747 0 : pdu = conn->pdu_in_progress;
4748 :
4749 0 : switch (conn->pdu_recv_state) {
4750 0 : case ISCSI_PDU_RECV_STATE_AWAIT_PDU_READY:
4751 0 : assert(conn->pdu_in_progress == NULL);
4752 :
4753 0 : conn->pdu_in_progress = iscsi_get_pdu(conn);
4754 0 : if (conn->pdu_in_progress == NULL) {
4755 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4756 : }
4757 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_AWAIT_PDU_HDR;
4758 0 : break;
4759 0 : case ISCSI_PDU_RECV_STATE_AWAIT_PDU_HDR:
4760 0 : if (pdu->bhs_valid_bytes < ISCSI_BHS_LEN) {
4761 0 : rc = iscsi_conn_read_data(conn,
4762 0 : ISCSI_BHS_LEN - pdu->bhs_valid_bytes,
4763 0 : (uint8_t *)&pdu->bhs + pdu->bhs_valid_bytes);
4764 0 : if (rc < 0) {
4765 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4766 0 : break;
4767 : }
4768 0 : pdu->bhs_valid_bytes += rc;
4769 0 : if (pdu->bhs_valid_bytes < ISCSI_BHS_LEN) {
4770 0 : return 0;
4771 : }
4772 : }
4773 :
4774 : /* conn->is_logged_out must be checked after completing to process
4775 : * logout request, i.e., before processing PDU header in this state
4776 : * machine, otherwise logout response may not be sent to initiator
4777 : * and initiator may get logout timeout.
4778 : */
4779 0 : if (spdk_unlikely(conn->is_logged_out)) {
4780 0 : SPDK_DEBUGLOG(iscsi, "pdu received after logout\n");
4781 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4782 0 : break;
4783 : }
4784 :
4785 0 : pdu->data_segment_len = ISCSI_ALIGN(DGET24(pdu->bhs.data_segment_len));
4786 0 : pdu->data_buf_len = pdu->data_segment_len;
4787 :
4788 : /* AHS */
4789 0 : ahs_len = pdu->bhs.total_ahs_len * 4;
4790 0 : if (ahs_len > ISCSI_AHS_LEN) {
4791 0 : SPDK_DEBUGLOG(iscsi, "pdu ahs length %d is invalid\n", ahs_len);
4792 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4793 0 : break;
4794 : }
4795 :
4796 0 : if (pdu->ahs_valid_bytes < ahs_len) {
4797 0 : rc = iscsi_conn_read_data(conn,
4798 0 : ahs_len - pdu->ahs_valid_bytes,
4799 0 : pdu->ahs + pdu->ahs_valid_bytes);
4800 0 : if (rc < 0) {
4801 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4802 0 : break;
4803 : }
4804 :
4805 0 : pdu->ahs_valid_bytes += rc;
4806 0 : if (pdu->ahs_valid_bytes < ahs_len) {
4807 0 : return 0;
4808 : }
4809 : }
4810 :
4811 : /* Header Digest */
4812 0 : if (conn->header_digest &&
4813 0 : pdu->hdigest_valid_bytes < ISCSI_DIGEST_LEN) {
4814 0 : rc = iscsi_conn_read_data(conn,
4815 0 : ISCSI_DIGEST_LEN - pdu->hdigest_valid_bytes,
4816 0 : pdu->header_digest + pdu->hdigest_valid_bytes);
4817 0 : if (rc < 0) {
4818 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4819 0 : break;
4820 : }
4821 :
4822 0 : pdu->hdigest_valid_bytes += rc;
4823 0 : if (pdu->hdigest_valid_bytes < ISCSI_DIGEST_LEN) {
4824 0 : return 0;
4825 : }
4826 : }
4827 :
4828 0 : if (conn->header_digest) {
4829 0 : crc32c = iscsi_pdu_calc_header_digest(pdu);
4830 0 : rc = MATCH_DIGEST_WORD(pdu->header_digest, crc32c);
4831 0 : if (rc == 0) {
4832 0 : SPDK_ERRLOG("header digest error (%s)\n", conn->initiator_name);
4833 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4834 0 : break;
4835 : }
4836 : }
4837 :
4838 0 : rc = iscsi_pdu_hdr_handle(conn, pdu);
4839 0 : if (rc < 0) {
4840 0 : SPDK_ERRLOG("Critical error is detected. Close the connection\n");
4841 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4842 0 : break;
4843 : }
4844 :
4845 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD;
4846 0 : break;
4847 0 : case ISCSI_PDU_RECV_STATE_AWAIT_PDU_PAYLOAD:
4848 0 : if (pdu->data_segment_len != 0) {
4849 0 : rc = iscsi_pdu_payload_read(conn, pdu);
4850 0 : if (rc > 0) {
4851 0 : return 0;
4852 0 : } else if (rc < 0) {
4853 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4854 0 : break;
4855 : }
4856 : }
4857 :
4858 : /* All data for this PDU has now been read from the socket. */
4859 0 : spdk_trace_record(TRACE_ISCSI_READ_PDU, conn->trace_id, pdu->data_valid_bytes,
4860 : (uintptr_t)pdu, pdu->bhs.opcode);
4861 :
4862 0 : if (!pdu->is_rejected) {
4863 0 : rc = iscsi_pdu_payload_handle(conn, pdu);
4864 : } else {
4865 0 : rc = 0;
4866 : }
4867 0 : if (rc == 0) {
4868 0 : spdk_trace_record(TRACE_ISCSI_TASK_EXECUTED, conn->trace_id, 0, (uintptr_t)pdu);
4869 0 : iscsi_put_pdu(pdu);
4870 0 : conn->pdu_in_progress = NULL;
4871 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_AWAIT_PDU_READY;
4872 0 : return 1;
4873 : } else {
4874 0 : conn->pdu_recv_state = ISCSI_PDU_RECV_STATE_ERROR;
4875 : }
4876 0 : break;
4877 0 : case ISCSI_PDU_RECV_STATE_ERROR:
4878 0 : return SPDK_ISCSI_CONNECTION_FATAL;
4879 0 : default:
4880 0 : assert(false);
4881 : SPDK_ERRLOG("code should not come here\n");
4882 : break;
4883 : }
4884 0 : } while (prev_state != conn->pdu_recv_state);
4885 :
4886 0 : return 0;
4887 : }
4888 :
4889 : #define GET_PDU_LOOP_COUNT 16
4890 :
4891 : int
4892 0 : iscsi_handle_incoming_pdus(struct spdk_iscsi_conn *conn)
4893 : {
4894 : int i, rc;
4895 :
4896 : /* Read new PDUs from network */
4897 0 : for (i = 0; i < GET_PDU_LOOP_COUNT; i++) {
4898 0 : rc = iscsi_read_pdu(conn);
4899 0 : if (rc == 0) {
4900 0 : break;
4901 0 : } else if (rc < 0) {
4902 0 : return rc;
4903 : }
4904 :
4905 0 : if (conn->is_stopped) {
4906 0 : break;
4907 : }
4908 : }
4909 :
4910 0 : return i;
4911 : }
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