Commit | Line | Data |
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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
1dc563a6 | 30 | * Copyright (c) 2011, 2015, Intel Corporation. |
d7e09d03 PT |
31 | */ |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * lnet/lnet/lib-move.c | |
37 | * | |
38 | * Data movement routines | |
39 | */ | |
40 | ||
41 | #define DEBUG_SUBSYSTEM S_LNET | |
42 | ||
9fdaf8c0 | 43 | #include "../../include/linux/lnet/lib-lnet.h" |
d7e09d03 PT |
44 | |
45 | static int local_nid_dist_zero = 1; | |
8cc7b4b9 PT |
46 | module_param(local_nid_dist_zero, int, 0444); |
47 | MODULE_PARM_DESC(local_nid_dist_zero, "Reserved"); | |
d7e09d03 PT |
48 | |
49 | int | |
af66a6e2 | 50 | lnet_fail_nid(lnet_nid_t nid, unsigned int threshold) |
d7e09d03 | 51 | { |
7e7ab095 | 52 | lnet_test_peer_t *tp; |
24f69590 | 53 | lnet_test_peer_t *temp; |
7e7ab095 MS |
54 | struct list_head *el; |
55 | struct list_head *next; | |
56 | struct list_head cull; | |
d7e09d03 | 57 | |
d7e09d03 | 58 | /* NB: use lnet_net_lock(0) to serialize operations on test peers */ |
5fd88337 | 59 | if (threshold) { |
d7e09d03 PT |
60 | /* Adding a new entry */ |
61 | LIBCFS_ALLOC(tp, sizeof(*tp)); | |
06ace26e | 62 | if (!tp) |
d7e09d03 PT |
63 | return -ENOMEM; |
64 | ||
65 | tp->tp_nid = nid; | |
66 | tp->tp_threshold = threshold; | |
67 | ||
68 | lnet_net_lock(0); | |
69 | list_add_tail(&tp->tp_list, &the_lnet.ln_test_peers); | |
70 | lnet_net_unlock(0); | |
71 | return 0; | |
72 | } | |
73 | ||
74 | /* removing entries */ | |
75 | INIT_LIST_HEAD(&cull); | |
76 | ||
77 | lnet_net_lock(0); | |
78 | ||
af66a6e2 LN |
79 | list_for_each_safe(el, next, &the_lnet.ln_test_peers) { |
80 | tp = list_entry(el, lnet_test_peer_t, tp_list); | |
d7e09d03 | 81 | |
5fd88337 | 82 | if (!tp->tp_threshold || /* needs culling anyway */ |
d7e09d03 | 83 | nid == LNET_NID_ANY || /* removing all entries */ |
9b79ca85 | 84 | tp->tp_nid == nid) { /* matched this one */ |
af66a6e2 LN |
85 | list_del(&tp->tp_list); |
86 | list_add(&tp->tp_list, &cull); | |
d7e09d03 PT |
87 | } |
88 | } | |
89 | ||
90 | lnet_net_unlock(0); | |
91 | ||
24f69590 | 92 | list_for_each_entry_safe(tp, temp, &cull, tp_list) { |
af66a6e2 LN |
93 | list_del(&tp->tp_list); |
94 | LIBCFS_FREE(tp, sizeof(*tp)); | |
d7e09d03 PT |
95 | } |
96 | return 0; | |
97 | } | |
98 | ||
99 | static int | |
af66a6e2 | 100 | fail_peer(lnet_nid_t nid, int outgoing) |
d7e09d03 PT |
101 | { |
102 | lnet_test_peer_t *tp; | |
24f69590 | 103 | lnet_test_peer_t *temp; |
7e7ab095 MS |
104 | struct list_head *el; |
105 | struct list_head *next; | |
106 | struct list_head cull; | |
107 | int fail = 0; | |
d7e09d03 | 108 | |
af66a6e2 | 109 | INIT_LIST_HEAD(&cull); |
d7e09d03 PT |
110 | |
111 | /* NB: use lnet_net_lock(0) to serialize operations on test peers */ | |
112 | lnet_net_lock(0); | |
113 | ||
af66a6e2 LN |
114 | list_for_each_safe(el, next, &the_lnet.ln_test_peers) { |
115 | tp = list_entry(el, lnet_test_peer_t, tp_list); | |
d7e09d03 | 116 | |
5fd88337 | 117 | if (!tp->tp_threshold) { |
d7e09d03 PT |
118 | /* zombie entry */ |
119 | if (outgoing) { | |
4420cfd3 JS |
120 | /* |
121 | * only cull zombies on outgoing tests, | |
d7e09d03 | 122 | * since we may be at interrupt priority on |
4420cfd3 JS |
123 | * incoming messages. |
124 | */ | |
af66a6e2 LN |
125 | list_del(&tp->tp_list); |
126 | list_add(&tp->tp_list, &cull); | |
d7e09d03 PT |
127 | } |
128 | continue; | |
129 | } | |
130 | ||
131 | if (tp->tp_nid == LNET_NID_ANY || /* fail every peer */ | |
132 | nid == tp->tp_nid) { /* fail this peer */ | |
133 | fail = 1; | |
134 | ||
135 | if (tp->tp_threshold != LNET_MD_THRESH_INF) { | |
136 | tp->tp_threshold--; | |
137 | if (outgoing && | |
5fd88337 | 138 | !tp->tp_threshold) { |
d7e09d03 | 139 | /* see above */ |
af66a6e2 LN |
140 | list_del(&tp->tp_list); |
141 | list_add(&tp->tp_list, &cull); | |
d7e09d03 PT |
142 | } |
143 | } | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
148 | lnet_net_unlock(0); | |
149 | ||
24f69590 | 150 | list_for_each_entry_safe(tp, temp, &cull, tp_list) { |
af66a6e2 | 151 | list_del(&tp->tp_list); |
d7e09d03 | 152 | |
af66a6e2 | 153 | LIBCFS_FREE(tp, sizeof(*tp)); |
d7e09d03 PT |
154 | } |
155 | ||
2b5f2e44 | 156 | return fail; |
d7e09d03 PT |
157 | } |
158 | ||
159 | unsigned int | |
f351bad2 | 160 | lnet_iov_nob(unsigned int niov, struct kvec *iov) |
d7e09d03 PT |
161 | { |
162 | unsigned int nob = 0; | |
163 | ||
a739735c | 164 | LASSERT(!niov || iov); |
d7e09d03 PT |
165 | while (niov-- > 0) |
166 | nob += (iov++)->iov_len; | |
167 | ||
2b5f2e44 | 168 | return nob; |
d7e09d03 PT |
169 | } |
170 | EXPORT_SYMBOL(lnet_iov_nob); | |
171 | ||
172 | void | |
f351bad2 | 173 | lnet_copy_iov2iov(unsigned int ndiov, struct kvec *diov, unsigned int doffset, |
c314c319 JS |
174 | unsigned int nsiov, struct kvec *siov, unsigned int soffset, |
175 | unsigned int nob) | |
d7e09d03 PT |
176 | { |
177 | /* NB diov, siov are READ-ONLY */ | |
7e7ab095 | 178 | unsigned int this_nob; |
d7e09d03 | 179 | |
5fd88337 | 180 | if (!nob) |
d7e09d03 PT |
181 | return; |
182 | ||
183 | /* skip complete frags before 'doffset' */ | |
af66a6e2 | 184 | LASSERT(ndiov > 0); |
d7e09d03 PT |
185 | while (doffset >= diov->iov_len) { |
186 | doffset -= diov->iov_len; | |
187 | diov++; | |
188 | ndiov--; | |
af66a6e2 | 189 | LASSERT(ndiov > 0); |
d7e09d03 PT |
190 | } |
191 | ||
192 | /* skip complete frags before 'soffset' */ | |
af66a6e2 | 193 | LASSERT(nsiov > 0); |
d7e09d03 PT |
194 | while (soffset >= siov->iov_len) { |
195 | soffset -= siov->iov_len; | |
196 | siov++; | |
197 | nsiov--; | |
af66a6e2 | 198 | LASSERT(nsiov > 0); |
d7e09d03 PT |
199 | } |
200 | ||
201 | do { | |
af66a6e2 LN |
202 | LASSERT(ndiov > 0); |
203 | LASSERT(nsiov > 0); | |
0c575417 | 204 | this_nob = min(diov->iov_len - doffset, |
d7e09d03 | 205 | siov->iov_len - soffset); |
0c575417 | 206 | this_nob = min(this_nob, nob); |
d7e09d03 | 207 | |
af66a6e2 | 208 | memcpy((char *)diov->iov_base + doffset, |
c314c319 | 209 | (char *)siov->iov_base + soffset, this_nob); |
d7e09d03 PT |
210 | nob -= this_nob; |
211 | ||
212 | if (diov->iov_len > doffset + this_nob) { | |
213 | doffset += this_nob; | |
214 | } else { | |
215 | diov++; | |
216 | ndiov--; | |
217 | doffset = 0; | |
218 | } | |
219 | ||
220 | if (siov->iov_len > soffset + this_nob) { | |
221 | soffset += this_nob; | |
222 | } else { | |
223 | siov++; | |
224 | nsiov--; | |
225 | soffset = 0; | |
226 | } | |
227 | } while (nob > 0); | |
228 | } | |
229 | EXPORT_SYMBOL(lnet_copy_iov2iov); | |
230 | ||
231 | int | |
f351bad2 | 232 | lnet_extract_iov(int dst_niov, struct kvec *dst, |
c314c319 JS |
233 | int src_niov, struct kvec *src, |
234 | unsigned int offset, unsigned int len) | |
d7e09d03 | 235 | { |
4420cfd3 JS |
236 | /* |
237 | * Initialise 'dst' to the subset of 'src' starting at 'offset', | |
d7e09d03 | 238 | * for exactly 'len' bytes, and return the number of entries. |
4420cfd3 JS |
239 | * NB not destructive to 'src' |
240 | */ | |
7e7ab095 MS |
241 | unsigned int frag_len; |
242 | unsigned int niov; | |
d7e09d03 | 243 | |
5fd88337 | 244 | if (!len) /* no data => */ |
2b5f2e44 | 245 | return 0; /* no frags */ |
d7e09d03 | 246 | |
af66a6e2 | 247 | LASSERT(src_niov > 0); |
d7e09d03 PT |
248 | while (offset >= src->iov_len) { /* skip initial frags */ |
249 | offset -= src->iov_len; | |
250 | src_niov--; | |
251 | src++; | |
af66a6e2 | 252 | LASSERT(src_niov > 0); |
d7e09d03 PT |
253 | } |
254 | ||
255 | niov = 1; | |
256 | for (;;) { | |
af66a6e2 LN |
257 | LASSERT(src_niov > 0); |
258 | LASSERT((int)niov <= dst_niov); | |
d7e09d03 PT |
259 | |
260 | frag_len = src->iov_len - offset; | |
261 | dst->iov_base = ((char *)src->iov_base) + offset; | |
262 | ||
263 | if (len <= frag_len) { | |
264 | dst->iov_len = len; | |
2b5f2e44 | 265 | return niov; |
d7e09d03 PT |
266 | } |
267 | ||
268 | dst->iov_len = frag_len; | |
269 | ||
270 | len -= frag_len; | |
271 | dst++; | |
272 | src++; | |
273 | niov++; | |
274 | src_niov--; | |
275 | offset = 0; | |
276 | } | |
277 | } | |
278 | EXPORT_SYMBOL(lnet_extract_iov); | |
279 | ||
d7e09d03 | 280 | unsigned int |
af66a6e2 | 281 | lnet_kiov_nob(unsigned int niov, lnet_kiov_t *kiov) |
d7e09d03 | 282 | { |
7e7ab095 | 283 | unsigned int nob = 0; |
d7e09d03 | 284 | |
a739735c | 285 | LASSERT(!niov || kiov); |
d7e09d03 PT |
286 | while (niov-- > 0) |
287 | nob += (kiov++)->kiov_len; | |
288 | ||
2b5f2e44 | 289 | return nob; |
d7e09d03 PT |
290 | } |
291 | EXPORT_SYMBOL(lnet_kiov_nob); | |
292 | ||
293 | void | |
af66a6e2 | 294 | lnet_copy_kiov2kiov(unsigned int ndiov, lnet_kiov_t *diov, unsigned int doffset, |
ae4003f0 LN |
295 | unsigned int nsiov, lnet_kiov_t *siov, unsigned int soffset, |
296 | unsigned int nob) | |
d7e09d03 PT |
297 | { |
298 | /* NB diov, siov are READ-ONLY */ | |
7e7ab095 MS |
299 | unsigned int this_nob; |
300 | char *daddr = NULL; | |
301 | char *saddr = NULL; | |
d7e09d03 | 302 | |
5fd88337 | 303 | if (!nob) |
d7e09d03 PT |
304 | return; |
305 | ||
af66a6e2 | 306 | LASSERT(!in_interrupt()); |
d7e09d03 | 307 | |
af66a6e2 | 308 | LASSERT(ndiov > 0); |
d7e09d03 PT |
309 | while (doffset >= diov->kiov_len) { |
310 | doffset -= diov->kiov_len; | |
311 | diov++; | |
312 | ndiov--; | |
af66a6e2 | 313 | LASSERT(ndiov > 0); |
d7e09d03 PT |
314 | } |
315 | ||
af66a6e2 | 316 | LASSERT(nsiov > 0); |
d7e09d03 PT |
317 | while (soffset >= siov->kiov_len) { |
318 | soffset -= siov->kiov_len; | |
319 | siov++; | |
320 | nsiov--; | |
af66a6e2 | 321 | LASSERT(nsiov > 0); |
d7e09d03 PT |
322 | } |
323 | ||
324 | do { | |
af66a6e2 LN |
325 | LASSERT(ndiov > 0); |
326 | LASSERT(nsiov > 0); | |
0c575417 | 327 | this_nob = min(diov->kiov_len - doffset, |
d7e09d03 | 328 | siov->kiov_len - soffset); |
0c575417 | 329 | this_nob = min(this_nob, nob); |
d7e09d03 | 330 | |
06ace26e | 331 | if (!daddr) |
d7e09d03 PT |
332 | daddr = ((char *)kmap(diov->kiov_page)) + |
333 | diov->kiov_offset + doffset; | |
06ace26e | 334 | if (!saddr) |
d7e09d03 PT |
335 | saddr = ((char *)kmap(siov->kiov_page)) + |
336 | siov->kiov_offset + soffset; | |
337 | ||
4420cfd3 JS |
338 | /* |
339 | * Vanishing risk of kmap deadlock when mapping 2 pages. | |
d7e09d03 | 340 | * However in practice at least one of the kiovs will be mapped |
4420cfd3 JS |
341 | * kernel pages and the map/unmap will be NOOPs |
342 | */ | |
af66a6e2 | 343 | memcpy(daddr, saddr, this_nob); |
d7e09d03 PT |
344 | nob -= this_nob; |
345 | ||
346 | if (diov->kiov_len > doffset + this_nob) { | |
347 | daddr += this_nob; | |
348 | doffset += this_nob; | |
349 | } else { | |
350 | kunmap(diov->kiov_page); | |
351 | daddr = NULL; | |
352 | diov++; | |
353 | ndiov--; | |
354 | doffset = 0; | |
355 | } | |
356 | ||
357 | if (siov->kiov_len > soffset + this_nob) { | |
358 | saddr += this_nob; | |
359 | soffset += this_nob; | |
360 | } else { | |
361 | kunmap(siov->kiov_page); | |
362 | saddr = NULL; | |
363 | siov++; | |
364 | nsiov--; | |
365 | soffset = 0; | |
366 | } | |
367 | } while (nob > 0); | |
368 | ||
06ace26e | 369 | if (daddr) |
d7e09d03 | 370 | kunmap(diov->kiov_page); |
06ace26e | 371 | if (saddr) |
d7e09d03 PT |
372 | kunmap(siov->kiov_page); |
373 | } | |
374 | EXPORT_SYMBOL(lnet_copy_kiov2kiov); | |
375 | ||
376 | void | |
f351bad2 | 377 | lnet_copy_kiov2iov(unsigned int niov, struct kvec *iov, unsigned int iovoffset, |
ae4003f0 LN |
378 | unsigned int nkiov, lnet_kiov_t *kiov, |
379 | unsigned int kiovoffset, unsigned int nob) | |
d7e09d03 PT |
380 | { |
381 | /* NB iov, kiov are READ-ONLY */ | |
7e7ab095 MS |
382 | unsigned int this_nob; |
383 | char *addr = NULL; | |
d7e09d03 | 384 | |
5fd88337 | 385 | if (!nob) |
d7e09d03 PT |
386 | return; |
387 | ||
af66a6e2 | 388 | LASSERT(!in_interrupt()); |
d7e09d03 | 389 | |
af66a6e2 | 390 | LASSERT(niov > 0); |
d7e09d03 PT |
391 | while (iovoffset >= iov->iov_len) { |
392 | iovoffset -= iov->iov_len; | |
393 | iov++; | |
394 | niov--; | |
af66a6e2 | 395 | LASSERT(niov > 0); |
d7e09d03 PT |
396 | } |
397 | ||
af66a6e2 | 398 | LASSERT(nkiov > 0); |
d7e09d03 PT |
399 | while (kiovoffset >= kiov->kiov_len) { |
400 | kiovoffset -= kiov->kiov_len; | |
401 | kiov++; | |
402 | nkiov--; | |
af66a6e2 | 403 | LASSERT(nkiov > 0); |
d7e09d03 PT |
404 | } |
405 | ||
406 | do { | |
af66a6e2 LN |
407 | LASSERT(niov > 0); |
408 | LASSERT(nkiov > 0); | |
fce6ad22 JM |
409 | this_nob = min(iov->iov_len - iovoffset, |
410 | (__kernel_size_t) kiov->kiov_len - kiovoffset); | |
0c575417 | 411 | this_nob = min(this_nob, nob); |
d7e09d03 | 412 | |
06ace26e | 413 | if (!addr) |
d7e09d03 PT |
414 | addr = ((char *)kmap(kiov->kiov_page)) + |
415 | kiov->kiov_offset + kiovoffset; | |
416 | ||
af66a6e2 | 417 | memcpy((char *)iov->iov_base + iovoffset, addr, this_nob); |
d7e09d03 PT |
418 | nob -= this_nob; |
419 | ||
420 | if (iov->iov_len > iovoffset + this_nob) { | |
421 | iovoffset += this_nob; | |
422 | } else { | |
423 | iov++; | |
424 | niov--; | |
425 | iovoffset = 0; | |
426 | } | |
427 | ||
428 | if (kiov->kiov_len > kiovoffset + this_nob) { | |
429 | addr += this_nob; | |
430 | kiovoffset += this_nob; | |
431 | } else { | |
432 | kunmap(kiov->kiov_page); | |
433 | addr = NULL; | |
434 | kiov++; | |
435 | nkiov--; | |
436 | kiovoffset = 0; | |
437 | } | |
438 | ||
439 | } while (nob > 0); | |
440 | ||
06ace26e | 441 | if (addr) |
d7e09d03 PT |
442 | kunmap(kiov->kiov_page); |
443 | } | |
444 | EXPORT_SYMBOL(lnet_copy_kiov2iov); | |
445 | ||
446 | void | |
ae4003f0 LN |
447 | lnet_copy_iov2kiov(unsigned int nkiov, lnet_kiov_t *kiov, |
448 | unsigned int kiovoffset, unsigned int niov, | |
f351bad2 | 449 | struct kvec *iov, unsigned int iovoffset, |
ae4003f0 | 450 | unsigned int nob) |
d7e09d03 PT |
451 | { |
452 | /* NB kiov, iov are READ-ONLY */ | |
7e7ab095 MS |
453 | unsigned int this_nob; |
454 | char *addr = NULL; | |
d7e09d03 | 455 | |
5fd88337 | 456 | if (!nob) |
d7e09d03 PT |
457 | return; |
458 | ||
af66a6e2 | 459 | LASSERT(!in_interrupt()); |
d7e09d03 | 460 | |
af66a6e2 | 461 | LASSERT(nkiov > 0); |
d7e09d03 PT |
462 | while (kiovoffset >= kiov->kiov_len) { |
463 | kiovoffset -= kiov->kiov_len; | |
464 | kiov++; | |
465 | nkiov--; | |
af66a6e2 | 466 | LASSERT(nkiov > 0); |
d7e09d03 PT |
467 | } |
468 | ||
af66a6e2 | 469 | LASSERT(niov > 0); |
d7e09d03 PT |
470 | while (iovoffset >= iov->iov_len) { |
471 | iovoffset -= iov->iov_len; | |
472 | iov++; | |
473 | niov--; | |
af66a6e2 | 474 | LASSERT(niov > 0); |
d7e09d03 PT |
475 | } |
476 | ||
477 | do { | |
af66a6e2 LN |
478 | LASSERT(nkiov > 0); |
479 | LASSERT(niov > 0); | |
fce6ad22 | 480 | this_nob = min((__kernel_size_t) kiov->kiov_len - kiovoffset, |
d7e09d03 | 481 | iov->iov_len - iovoffset); |
0c575417 | 482 | this_nob = min(this_nob, nob); |
d7e09d03 | 483 | |
06ace26e | 484 | if (!addr) |
d7e09d03 PT |
485 | addr = ((char *)kmap(kiov->kiov_page)) + |
486 | kiov->kiov_offset + kiovoffset; | |
487 | ||
af66a6e2 | 488 | memcpy(addr, (char *)iov->iov_base + iovoffset, this_nob); |
d7e09d03 PT |
489 | nob -= this_nob; |
490 | ||
491 | if (kiov->kiov_len > kiovoffset + this_nob) { | |
492 | addr += this_nob; | |
493 | kiovoffset += this_nob; | |
494 | } else { | |
495 | kunmap(kiov->kiov_page); | |
496 | addr = NULL; | |
497 | kiov++; | |
498 | nkiov--; | |
499 | kiovoffset = 0; | |
500 | } | |
501 | ||
502 | if (iov->iov_len > iovoffset + this_nob) { | |
503 | iovoffset += this_nob; | |
504 | } else { | |
505 | iov++; | |
506 | niov--; | |
507 | iovoffset = 0; | |
508 | } | |
509 | } while (nob > 0); | |
510 | ||
06ace26e | 511 | if (addr) |
d7e09d03 PT |
512 | kunmap(kiov->kiov_page); |
513 | } | |
514 | EXPORT_SYMBOL(lnet_copy_iov2kiov); | |
515 | ||
516 | int | |
af66a6e2 | 517 | lnet_extract_kiov(int dst_niov, lnet_kiov_t *dst, |
c314c319 JS |
518 | int src_niov, lnet_kiov_t *src, |
519 | unsigned int offset, unsigned int len) | |
d7e09d03 | 520 | { |
4420cfd3 JS |
521 | /* |
522 | * Initialise 'dst' to the subset of 'src' starting at 'offset', | |
d7e09d03 | 523 | * for exactly 'len' bytes, and return the number of entries. |
4420cfd3 JS |
524 | * NB not destructive to 'src' |
525 | */ | |
7e7ab095 MS |
526 | unsigned int frag_len; |
527 | unsigned int niov; | |
d7e09d03 | 528 | |
5fd88337 | 529 | if (!len) /* no data => */ |
2b5f2e44 | 530 | return 0; /* no frags */ |
d7e09d03 | 531 | |
af66a6e2 | 532 | LASSERT(src_niov > 0); |
d7e09d03 PT |
533 | while (offset >= src->kiov_len) { /* skip initial frags */ |
534 | offset -= src->kiov_len; | |
535 | src_niov--; | |
536 | src++; | |
af66a6e2 | 537 | LASSERT(src_niov > 0); |
d7e09d03 PT |
538 | } |
539 | ||
540 | niov = 1; | |
541 | for (;;) { | |
af66a6e2 LN |
542 | LASSERT(src_niov > 0); |
543 | LASSERT((int)niov <= dst_niov); | |
d7e09d03 PT |
544 | |
545 | frag_len = src->kiov_len - offset; | |
546 | dst->kiov_page = src->kiov_page; | |
547 | dst->kiov_offset = src->kiov_offset + offset; | |
548 | ||
549 | if (len <= frag_len) { | |
550 | dst->kiov_len = len; | |
ae4003f0 | 551 | LASSERT(dst->kiov_offset + dst->kiov_len |
09cbfeaf | 552 | <= PAGE_SIZE); |
2b5f2e44 | 553 | return niov; |
d7e09d03 PT |
554 | } |
555 | ||
556 | dst->kiov_len = frag_len; | |
09cbfeaf | 557 | LASSERT(dst->kiov_offset + dst->kiov_len <= PAGE_SIZE); |
d7e09d03 PT |
558 | |
559 | len -= frag_len; | |
560 | dst++; | |
561 | src++; | |
562 | niov++; | |
563 | src_niov--; | |
564 | offset = 0; | |
565 | } | |
566 | } | |
567 | EXPORT_SYMBOL(lnet_extract_kiov); | |
568 | ||
b7acfc95 | 569 | void |
d7e09d03 PT |
570 | lnet_ni_recv(lnet_ni_t *ni, void *private, lnet_msg_t *msg, int delayed, |
571 | unsigned int offset, unsigned int mlen, unsigned int rlen) | |
572 | { | |
7e7ab095 | 573 | unsigned int niov = 0; |
f351bad2 | 574 | struct kvec *iov = NULL; |
7e7ab095 MS |
575 | lnet_kiov_t *kiov = NULL; |
576 | int rc; | |
d7e09d03 | 577 | |
af66a6e2 | 578 | LASSERT(!in_interrupt()); |
5fd88337 | 579 | LASSERT(!mlen || msg); |
d7e09d03 | 580 | |
06ace26e | 581 | if (msg) { |
d7e09d03 PT |
582 | LASSERT(msg->msg_receiving); |
583 | LASSERT(!msg->msg_sending); | |
584 | LASSERT(rlen == msg->msg_len); | |
585 | LASSERT(mlen <= msg->msg_len); | |
586 | LASSERT(msg->msg_offset == offset); | |
587 | LASSERT(msg->msg_wanted == mlen); | |
588 | ||
589 | msg->msg_receiving = 0; | |
590 | ||
5fd88337 | 591 | if (mlen) { |
d7e09d03 PT |
592 | niov = msg->msg_niov; |
593 | iov = msg->msg_iov; | |
594 | kiov = msg->msg_kiov; | |
595 | ||
af66a6e2 | 596 | LASSERT(niov > 0); |
06ace26e | 597 | LASSERT(!iov != !kiov); |
d7e09d03 PT |
598 | } |
599 | } | |
600 | ||
0eee6778 JS |
601 | rc = ni->ni_lnd->lnd_recv(ni, private, msg, delayed, |
602 | niov, iov, kiov, offset, mlen, rlen); | |
d7e09d03 PT |
603 | if (rc < 0) |
604 | lnet_finalize(ni, msg, rc); | |
605 | } | |
606 | ||
f526b20a | 607 | static void |
d7e09d03 PT |
608 | lnet_setpayloadbuffer(lnet_msg_t *msg) |
609 | { | |
610 | lnet_libmd_t *md = msg->msg_md; | |
611 | ||
af66a6e2 LN |
612 | LASSERT(msg->msg_len > 0); |
613 | LASSERT(!msg->msg_routing); | |
06ace26e | 614 | LASSERT(md); |
5fd88337 | 615 | LASSERT(!msg->msg_niov); |
06ace26e JS |
616 | LASSERT(!msg->msg_iov); |
617 | LASSERT(!msg->msg_kiov); | |
d7e09d03 PT |
618 | |
619 | msg->msg_niov = md->md_niov; | |
5fd88337 | 620 | if (md->md_options & LNET_MD_KIOV) |
d7e09d03 PT |
621 | msg->msg_kiov = md->md_iov.kiov; |
622 | else | |
623 | msg->msg_iov = md->md_iov.iov; | |
624 | } | |
625 | ||
626 | void | |
627 | lnet_prep_send(lnet_msg_t *msg, int type, lnet_process_id_t target, | |
628 | unsigned int offset, unsigned int len) | |
629 | { | |
630 | msg->msg_type = type; | |
631 | msg->msg_target = target; | |
632 | msg->msg_len = len; | |
633 | msg->msg_offset = offset; | |
634 | ||
5fd88337 | 635 | if (len) |
d7e09d03 PT |
636 | lnet_setpayloadbuffer(msg); |
637 | ||
af66a6e2 | 638 | memset(&msg->msg_hdr, 0, sizeof(msg->msg_hdr)); |
d7e09d03 PT |
639 | msg->msg_hdr.type = cpu_to_le32(type); |
640 | msg->msg_hdr.dest_nid = cpu_to_le64(target.nid); | |
641 | msg->msg_hdr.dest_pid = cpu_to_le32(target.pid); | |
642 | /* src_nid will be set later */ | |
643 | msg->msg_hdr.src_pid = cpu_to_le32(the_lnet.ln_pid); | |
644 | msg->msg_hdr.payload_length = cpu_to_le32(len); | |
645 | } | |
646 | ||
f526b20a | 647 | static void |
d7e09d03 PT |
648 | lnet_ni_send(lnet_ni_t *ni, lnet_msg_t *msg) |
649 | { | |
7e7ab095 MS |
650 | void *priv = msg->msg_private; |
651 | int rc; | |
d7e09d03 | 652 | |
af66a6e2 LN |
653 | LASSERT(!in_interrupt()); |
654 | LASSERT(LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND || | |
c314c319 | 655 | (msg->msg_txcredit && msg->msg_peertxcredit)); |
d7e09d03 | 656 | |
0eee6778 | 657 | rc = ni->ni_lnd->lnd_send(ni, priv, msg); |
d7e09d03 PT |
658 | if (rc < 0) |
659 | lnet_finalize(ni, msg, rc); | |
660 | } | |
661 | ||
f526b20a | 662 | static int |
d7e09d03 PT |
663 | lnet_ni_eager_recv(lnet_ni_t *ni, lnet_msg_t *msg) |
664 | { | |
7e7ab095 | 665 | int rc; |
d7e09d03 PT |
666 | |
667 | LASSERT(!msg->msg_sending); | |
668 | LASSERT(msg->msg_receiving); | |
669 | LASSERT(!msg->msg_rx_ready_delay); | |
06ace26e | 670 | LASSERT(ni->ni_lnd->lnd_eager_recv); |
d7e09d03 PT |
671 | |
672 | msg->msg_rx_ready_delay = 1; | |
0eee6778 JS |
673 | rc = ni->ni_lnd->lnd_eager_recv(ni, msg->msg_private, msg, |
674 | &msg->msg_private); | |
5fd88337 | 675 | if (rc) { |
2d00bd17 | 676 | CERROR("recv from %s / send to %s aborted: eager_recv failed %d\n", |
d7e09d03 PT |
677 | libcfs_nid2str(msg->msg_rxpeer->lp_nid), |
678 | libcfs_id2str(msg->msg_target), rc); | |
679 | LASSERT(rc < 0); /* required by my callers */ | |
680 | } | |
681 | ||
682 | return rc; | |
683 | } | |
684 | ||
685 | /* NB: caller shall hold a ref on 'lp' as I'd drop lnet_net_lock */ | |
f526b20a | 686 | static void |
d7e09d03 PT |
687 | lnet_ni_query_locked(lnet_ni_t *ni, lnet_peer_t *lp) |
688 | { | |
a649ad1d | 689 | unsigned long last_alive = 0; |
d7e09d03 PT |
690 | |
691 | LASSERT(lnet_peer_aliveness_enabled(lp)); | |
06ace26e | 692 | LASSERT(ni->ni_lnd->lnd_query); |
d7e09d03 PT |
693 | |
694 | lnet_net_unlock(lp->lp_cpt); | |
0eee6778 | 695 | ni->ni_lnd->lnd_query(ni, lp->lp_nid, &last_alive); |
d7e09d03 PT |
696 | lnet_net_lock(lp->lp_cpt); |
697 | ||
698 | lp->lp_last_query = cfs_time_current(); | |
699 | ||
5fd88337 | 700 | if (last_alive) /* NI has updated timestamp */ |
d7e09d03 PT |
701 | lp->lp_last_alive = last_alive; |
702 | } | |
703 | ||
704 | /* NB: always called with lnet_net_lock held */ | |
705 | static inline int | |
a649ad1d | 706 | lnet_peer_is_alive(lnet_peer_t *lp, unsigned long now) |
d7e09d03 | 707 | { |
7e7ab095 | 708 | int alive; |
a649ad1d | 709 | unsigned long deadline; |
d7e09d03 | 710 | |
af66a6e2 | 711 | LASSERT(lnet_peer_aliveness_enabled(lp)); |
d7e09d03 PT |
712 | |
713 | /* Trust lnet_notify() if it has more recent aliveness news, but | |
714 | * ignore the initial assumed death (see lnet_peers_start_down()). | |
715 | */ | |
716 | if (!lp->lp_alive && lp->lp_alive_count > 0 && | |
717 | cfs_time_aftereq(lp->lp_timestamp, lp->lp_last_alive)) | |
718 | return 0; | |
719 | ||
720 | deadline = cfs_time_add(lp->lp_last_alive, | |
721 | cfs_time_seconds(lp->lp_ni->ni_peertimeout)); | |
722 | alive = cfs_time_after(deadline, now); | |
723 | ||
724 | /* Update obsolete lp_alive except for routers assumed to be dead | |
725 | * initially, because router checker would update aliveness in this | |
726 | * case, and moreover lp_last_alive at peer creation is assumed. | |
727 | */ | |
728 | if (alive && !lp->lp_alive && | |
5fd88337 | 729 | !(lnet_isrouter(lp) && !lp->lp_alive_count)) |
d7e09d03 PT |
730 | lnet_notify_locked(lp, 0, 1, lp->lp_last_alive); |
731 | ||
732 | return alive; | |
733 | } | |
734 | ||
4420cfd3 JS |
735 | /* |
736 | * NB: returns 1 when alive, 0 when dead, negative when error; | |
737 | * may drop the lnet_net_lock | |
738 | */ | |
f526b20a | 739 | static int |
af66a6e2 | 740 | lnet_peer_alive_locked(lnet_peer_t *lp) |
d7e09d03 | 741 | { |
a649ad1d | 742 | unsigned long now = cfs_time_current(); |
d7e09d03 PT |
743 | |
744 | if (!lnet_peer_aliveness_enabled(lp)) | |
745 | return -ENODEV; | |
746 | ||
747 | if (lnet_peer_is_alive(lp, now)) | |
748 | return 1; | |
749 | ||
4420cfd3 JS |
750 | /* |
751 | * Peer appears dead, but we should avoid frequent NI queries (at | |
752 | * most once per lnet_queryinterval seconds). | |
753 | */ | |
5fd88337 | 754 | if (lp->lp_last_query) { |
d7e09d03 PT |
755 | static const int lnet_queryinterval = 1; |
756 | ||
a649ad1d | 757 | unsigned long next_query = |
d7e09d03 PT |
758 | cfs_time_add(lp->lp_last_query, |
759 | cfs_time_seconds(lnet_queryinterval)); | |
760 | ||
699503bc | 761 | if (time_before(now, next_query)) { |
d7e09d03 | 762 | if (lp->lp_alive) |
2d00bd17 | 763 | CWARN("Unexpected aliveness of peer %s: %d < %d (%d/%d)\n", |
d7e09d03 PT |
764 | libcfs_nid2str(lp->lp_nid), |
765 | (int)now, (int)next_query, | |
766 | lnet_queryinterval, | |
767 | lp->lp_ni->ni_peertimeout); | |
768 | return 0; | |
769 | } | |
770 | } | |
771 | ||
772 | /* query NI for latest aliveness news */ | |
773 | lnet_ni_query_locked(lp->lp_ni, lp); | |
774 | ||
775 | if (lnet_peer_is_alive(lp, now)) | |
776 | return 1; | |
777 | ||
778 | lnet_notify_locked(lp, 0, 0, lp->lp_last_alive); | |
779 | return 0; | |
780 | } | |
781 | ||
dee2857e IH |
782 | /** |
783 | * \param msg The message to be sent. | |
784 | * \param do_send True if lnet_ni_send() should be called in this function. | |
785 | * lnet_send() is going to lnet_net_unlock immediately after this, so | |
786 | * it sets do_send FALSE and I don't do the unlock/send/lock bit. | |
787 | * | |
ec5fb5be LZ |
788 | * \retval LNET_CREDIT_OK If \a msg sent or OK to send. |
789 | * \retval LNET_CREDIT_WAIT If \a msg blocked for credit. | |
790 | * \retval -EHOSTUNREACH If the next hop of the message appears dead. | |
791 | * \retval -ECANCELED If the MD of the message has been unlinked. | |
dee2857e IH |
792 | */ |
793 | static int | |
d7e09d03 PT |
794 | lnet_post_send_locked(lnet_msg_t *msg, int do_send) |
795 | { | |
7e7ab095 MS |
796 | lnet_peer_t *lp = msg->msg_txpeer; |
797 | lnet_ni_t *ni = lp->lp_ni; | |
798 | int cpt = msg->msg_tx_cpt; | |
799 | struct lnet_tx_queue *tq = ni->ni_tx_queues[cpt]; | |
d7e09d03 PT |
800 | |
801 | /* non-lnet_send() callers have checked before */ | |
802 | LASSERT(!do_send || msg->msg_tx_delayed); | |
803 | LASSERT(!msg->msg_receiving); | |
804 | LASSERT(msg->msg_tx_committed); | |
805 | ||
d7e09d03 | 806 | /* NB 'lp' is always the next hop */ |
5fd88337 JS |
807 | if (!(msg->msg_target.pid & LNET_PID_USERFLAG) && |
808 | !lnet_peer_alive_locked(lp)) { | |
d7e09d03 PT |
809 | the_lnet.ln_counters[cpt]->drop_count++; |
810 | the_lnet.ln_counters[cpt]->drop_length += msg->msg_len; | |
811 | lnet_net_unlock(cpt); | |
812 | ||
813 | CNETERR("Dropping message for %s: peer not alive\n", | |
814 | libcfs_id2str(msg->msg_target)); | |
815 | if (do_send) | |
816 | lnet_finalize(ni, msg, -EHOSTUNREACH); | |
817 | ||
818 | lnet_net_lock(cpt); | |
ec5fb5be | 819 | return -EHOSTUNREACH; |
d7e09d03 PT |
820 | } |
821 | ||
06ace26e | 822 | if (msg->msg_md && |
5fd88337 | 823 | (msg->msg_md->md_flags & LNET_MD_FLAG_ABORTED)) { |
dee2857e IH |
824 | lnet_net_unlock(cpt); |
825 | ||
2d00bd17 | 826 | CNETERR("Aborting message for %s: LNetM[DE]Unlink() already called on the MD/ME.\n", |
dee2857e IH |
827 | libcfs_id2str(msg->msg_target)); |
828 | if (do_send) | |
829 | lnet_finalize(ni, msg, -ECANCELED); | |
830 | ||
831 | lnet_net_lock(cpt); | |
ec5fb5be | 832 | return -ECANCELED; |
dee2857e IH |
833 | } |
834 | ||
d7e09d03 | 835 | if (!msg->msg_peertxcredit) { |
af66a6e2 | 836 | LASSERT((lp->lp_txcredits < 0) == |
c314c319 | 837 | !list_empty(&lp->lp_txq)); |
d7e09d03 PT |
838 | |
839 | msg->msg_peertxcredit = 1; | |
840 | lp->lp_txqnob += msg->msg_len + sizeof(lnet_hdr_t); | |
841 | lp->lp_txcredits--; | |
842 | ||
843 | if (lp->lp_txcredits < lp->lp_mintxcredits) | |
844 | lp->lp_mintxcredits = lp->lp_txcredits; | |
845 | ||
846 | if (lp->lp_txcredits < 0) { | |
847 | msg->msg_tx_delayed = 1; | |
848 | list_add_tail(&msg->msg_list, &lp->lp_txq); | |
ec5fb5be | 849 | return LNET_CREDIT_WAIT; |
d7e09d03 PT |
850 | } |
851 | } | |
852 | ||
853 | if (!msg->msg_txcredit) { | |
854 | LASSERT((tq->tq_credits < 0) == | |
855 | !list_empty(&tq->tq_delayed)); | |
856 | ||
857 | msg->msg_txcredit = 1; | |
858 | tq->tq_credits--; | |
859 | ||
860 | if (tq->tq_credits < tq->tq_credits_min) | |
861 | tq->tq_credits_min = tq->tq_credits; | |
862 | ||
863 | if (tq->tq_credits < 0) { | |
864 | msg->msg_tx_delayed = 1; | |
865 | list_add_tail(&msg->msg_list, &tq->tq_delayed); | |
ec5fb5be | 866 | return LNET_CREDIT_WAIT; |
d7e09d03 PT |
867 | } |
868 | } | |
869 | ||
870 | if (do_send) { | |
871 | lnet_net_unlock(cpt); | |
872 | lnet_ni_send(ni, msg); | |
873 | lnet_net_lock(cpt); | |
874 | } | |
ec5fb5be | 875 | return LNET_CREDIT_OK; |
d7e09d03 PT |
876 | } |
877 | ||
f526b20a | 878 | static lnet_rtrbufpool_t * |
d7e09d03 PT |
879 | lnet_msg2bufpool(lnet_msg_t *msg) |
880 | { | |
7e7ab095 MS |
881 | lnet_rtrbufpool_t *rbp; |
882 | int cpt; | |
d7e09d03 PT |
883 | |
884 | LASSERT(msg->msg_rx_committed); | |
885 | ||
886 | cpt = msg->msg_rx_cpt; | |
887 | rbp = &the_lnet.ln_rtrpools[cpt][0]; | |
888 | ||
889 | LASSERT(msg->msg_len <= LNET_MTU); | |
09cbfeaf | 890 | while (msg->msg_len > (unsigned int)rbp->rbp_npages * PAGE_SIZE) { |
d7e09d03 PT |
891 | rbp++; |
892 | LASSERT(rbp < &the_lnet.ln_rtrpools[cpt][LNET_NRBPOOLS]); | |
893 | } | |
894 | ||
895 | return rbp; | |
896 | } | |
897 | ||
f526b20a | 898 | static int |
af66a6e2 | 899 | lnet_post_routed_recv_locked(lnet_msg_t *msg, int do_recv) |
d7e09d03 | 900 | { |
4420cfd3 JS |
901 | /* |
902 | * lnet_parse is going to lnet_net_unlock immediately after this, so it | |
ec5fb5be LZ |
903 | * sets do_recv FALSE and I don't do the unlock/send/lock bit. |
904 | * I return LNET_CREDIT_WAIT if msg blocked and LNET_CREDIT_OK if | |
905 | * received or OK to receive | |
4420cfd3 | 906 | */ |
7e7ab095 MS |
907 | lnet_peer_t *lp = msg->msg_rxpeer; |
908 | lnet_rtrbufpool_t *rbp; | |
909 | lnet_rtrbuf_t *rb; | |
d7e09d03 | 910 | |
06ace26e JS |
911 | LASSERT(!msg->msg_iov); |
912 | LASSERT(!msg->msg_kiov); | |
5fd88337 | 913 | LASSERT(!msg->msg_niov); |
af66a6e2 LN |
914 | LASSERT(msg->msg_routing); |
915 | LASSERT(msg->msg_receiving); | |
916 | LASSERT(!msg->msg_sending); | |
d7e09d03 PT |
917 | |
918 | /* non-lnet_parse callers only receive delayed messages */ | |
919 | LASSERT(!do_recv || msg->msg_rx_delayed); | |
920 | ||
921 | if (!msg->msg_peerrtrcredit) { | |
af66a6e2 | 922 | LASSERT((lp->lp_rtrcredits < 0) == |
c314c319 | 923 | !list_empty(&lp->lp_rtrq)); |
d7e09d03 PT |
924 | |
925 | msg->msg_peerrtrcredit = 1; | |
926 | lp->lp_rtrcredits--; | |
927 | if (lp->lp_rtrcredits < lp->lp_minrtrcredits) | |
928 | lp->lp_minrtrcredits = lp->lp_rtrcredits; | |
929 | ||
930 | if (lp->lp_rtrcredits < 0) { | |
931 | /* must have checked eager_recv before here */ | |
932 | LASSERT(msg->msg_rx_ready_delay); | |
933 | msg->msg_rx_delayed = 1; | |
934 | list_add_tail(&msg->msg_list, &lp->lp_rtrq); | |
ec5fb5be | 935 | return LNET_CREDIT_WAIT; |
d7e09d03 PT |
936 | } |
937 | } | |
938 | ||
939 | rbp = lnet_msg2bufpool(msg); | |
940 | ||
941 | if (!msg->msg_rtrcredit) { | |
d7e09d03 PT |
942 | msg->msg_rtrcredit = 1; |
943 | rbp->rbp_credits--; | |
944 | if (rbp->rbp_credits < rbp->rbp_mincredits) | |
945 | rbp->rbp_mincredits = rbp->rbp_credits; | |
946 | ||
947 | if (rbp->rbp_credits < 0) { | |
948 | /* must have checked eager_recv before here */ | |
949 | LASSERT(msg->msg_rx_ready_delay); | |
950 | msg->msg_rx_delayed = 1; | |
951 | list_add_tail(&msg->msg_list, &rbp->rbp_msgs); | |
ec5fb5be | 952 | return LNET_CREDIT_WAIT; |
d7e09d03 PT |
953 | } |
954 | } | |
955 | ||
af66a6e2 | 956 | LASSERT(!list_empty(&rbp->rbp_bufs)); |
d7e09d03 PT |
957 | rb = list_entry(rbp->rbp_bufs.next, lnet_rtrbuf_t, rb_list); |
958 | list_del(&rb->rb_list); | |
959 | ||
960 | msg->msg_niov = rbp->rbp_npages; | |
961 | msg->msg_kiov = &rb->rb_kiov[0]; | |
962 | ||
963 | if (do_recv) { | |
964 | int cpt = msg->msg_rx_cpt; | |
965 | ||
966 | lnet_net_unlock(cpt); | |
967 | lnet_ni_recv(lp->lp_ni, msg->msg_private, msg, 1, | |
968 | 0, msg->msg_len, msg->msg_len); | |
969 | lnet_net_lock(cpt); | |
970 | } | |
ec5fb5be | 971 | return LNET_CREDIT_OK; |
d7e09d03 PT |
972 | } |
973 | ||
974 | void | |
975 | lnet_return_tx_credits_locked(lnet_msg_t *msg) | |
976 | { | |
7e7ab095 MS |
977 | lnet_peer_t *txpeer = msg->msg_txpeer; |
978 | lnet_msg_t *msg2; | |
d7e09d03 PT |
979 | |
980 | if (msg->msg_txcredit) { | |
7e7ab095 | 981 | struct lnet_ni *ni = txpeer->lp_ni; |
d7e09d03 PT |
982 | struct lnet_tx_queue *tq = ni->ni_tx_queues[msg->msg_tx_cpt]; |
983 | ||
984 | /* give back NI txcredits */ | |
985 | msg->msg_txcredit = 0; | |
986 | ||
987 | LASSERT((tq->tq_credits < 0) == | |
988 | !list_empty(&tq->tq_delayed)); | |
989 | ||
990 | tq->tq_credits++; | |
991 | if (tq->tq_credits <= 0) { | |
992 | msg2 = list_entry(tq->tq_delayed.next, | |
c314c319 | 993 | lnet_msg_t, msg_list); |
d7e09d03 PT |
994 | list_del(&msg2->msg_list); |
995 | ||
996 | LASSERT(msg2->msg_txpeer->lp_ni == ni); | |
997 | LASSERT(msg2->msg_tx_delayed); | |
998 | ||
999 | (void) lnet_post_send_locked(msg2, 1); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | if (msg->msg_peertxcredit) { | |
1004 | /* give back peer txcredits */ | |
1005 | msg->msg_peertxcredit = 0; | |
1006 | ||
1007 | LASSERT((txpeer->lp_txcredits < 0) == | |
1008 | !list_empty(&txpeer->lp_txq)); | |
1009 | ||
1010 | txpeer->lp_txqnob -= msg->msg_len + sizeof(lnet_hdr_t); | |
af66a6e2 | 1011 | LASSERT(txpeer->lp_txqnob >= 0); |
d7e09d03 PT |
1012 | |
1013 | txpeer->lp_txcredits++; | |
1014 | if (txpeer->lp_txcredits <= 0) { | |
1015 | msg2 = list_entry(txpeer->lp_txq.next, | |
c314c319 | 1016 | lnet_msg_t, msg_list); |
d7e09d03 PT |
1017 | list_del(&msg2->msg_list); |
1018 | ||
1019 | LASSERT(msg2->msg_txpeer == txpeer); | |
1020 | LASSERT(msg2->msg_tx_delayed); | |
1021 | ||
1022 | (void) lnet_post_send_locked(msg2, 1); | |
1023 | } | |
1024 | } | |
1025 | ||
06ace26e | 1026 | if (txpeer) { |
d7e09d03 PT |
1027 | msg->msg_txpeer = NULL; |
1028 | lnet_peer_decref_locked(txpeer); | |
1029 | } | |
1030 | } | |
1031 | ||
86ef6250 AS |
1032 | void |
1033 | lnet_schedule_blocked_locked(lnet_rtrbufpool_t *rbp) | |
1034 | { | |
1035 | lnet_msg_t *msg; | |
1036 | ||
1037 | if (list_empty(&rbp->rbp_msgs)) | |
1038 | return; | |
1039 | msg = list_entry(rbp->rbp_msgs.next, | |
1040 | lnet_msg_t, msg_list); | |
1041 | list_del(&msg->msg_list); | |
1042 | ||
1043 | (void)lnet_post_routed_recv_locked(msg, 1); | |
1044 | } | |
1045 | ||
1046 | void | |
1047 | lnet_drop_routed_msgs_locked(struct list_head *list, int cpt) | |
1048 | { | |
1049 | struct list_head drop; | |
1050 | lnet_msg_t *msg; | |
1051 | lnet_msg_t *tmp; | |
1052 | ||
1053 | INIT_LIST_HEAD(&drop); | |
1054 | ||
1055 | list_splice_init(list, &drop); | |
1056 | ||
1057 | lnet_net_unlock(cpt); | |
1058 | ||
1059 | list_for_each_entry_safe(msg, tmp, &drop, msg_list) { | |
1060 | lnet_ni_recv(msg->msg_rxpeer->lp_ni, msg->msg_private, NULL, | |
1061 | 0, 0, 0, msg->msg_hdr.payload_length); | |
1062 | list_del_init(&msg->msg_list); | |
1063 | lnet_finalize(NULL, msg, -ECANCELED); | |
1064 | } | |
1065 | ||
1066 | lnet_net_lock(cpt); | |
1067 | } | |
1068 | ||
d7e09d03 PT |
1069 | void |
1070 | lnet_return_rx_credits_locked(lnet_msg_t *msg) | |
1071 | { | |
7e7ab095 MS |
1072 | lnet_peer_t *rxpeer = msg->msg_rxpeer; |
1073 | lnet_msg_t *msg2; | |
d7e09d03 PT |
1074 | |
1075 | if (msg->msg_rtrcredit) { | |
1076 | /* give back global router credits */ | |
7e7ab095 | 1077 | lnet_rtrbuf_t *rb; |
d7e09d03 PT |
1078 | lnet_rtrbufpool_t *rbp; |
1079 | ||
4420cfd3 JS |
1080 | /* |
1081 | * NB If a msg ever blocks for a buffer in rbp_msgs, it stays | |
d7e09d03 | 1082 | * there until it gets one allocated, or aborts the wait |
4420cfd3 JS |
1083 | * itself |
1084 | */ | |
06ace26e | 1085 | LASSERT(msg->msg_kiov); |
d7e09d03 PT |
1086 | |
1087 | rb = list_entry(msg->msg_kiov, lnet_rtrbuf_t, rb_kiov[0]); | |
1088 | rbp = rb->rb_pool; | |
d7e09d03 PT |
1089 | |
1090 | msg->msg_kiov = NULL; | |
1091 | msg->msg_rtrcredit = 0; | |
1092 | ||
86ef6250 AS |
1093 | LASSERT(rbp == lnet_msg2bufpool(msg)); |
1094 | ||
d7e09d03 PT |
1095 | LASSERT((rbp->rbp_credits > 0) == |
1096 | !list_empty(&rbp->rbp_bufs)); | |
1097 | ||
86ef6250 AS |
1098 | /* |
1099 | * If routing is now turned off, we just drop this buffer and | |
1100 | * don't bother trying to return credits. | |
1101 | */ | |
1102 | if (!the_lnet.ln_routing) { | |
1103 | lnet_destroy_rtrbuf(rb, rbp->rbp_npages); | |
1104 | goto routing_off; | |
1105 | } | |
d7e09d03 | 1106 | |
86ef6250 AS |
1107 | /* |
1108 | * It is possible that a user has lowered the desired number of | |
1109 | * buffers in this pool. Make sure we never put back | |
1110 | * more buffers than the stated number. | |
1111 | */ | |
95fc2938 | 1112 | if (unlikely(rbp->rbp_credits >= rbp->rbp_req_nbuffers)) { |
86ef6250 AS |
1113 | /* Discard this buffer so we don't have too many. */ |
1114 | lnet_destroy_rtrbuf(rb, rbp->rbp_npages); | |
95fc2938 | 1115 | rbp->rbp_nbuffers--; |
86ef6250 AS |
1116 | } else { |
1117 | list_add(&rb->rb_list, &rbp->rbp_bufs); | |
1118 | rbp->rbp_credits++; | |
1119 | if (rbp->rbp_credits <= 0) | |
1120 | lnet_schedule_blocked_locked(rbp); | |
d7e09d03 PT |
1121 | } |
1122 | } | |
1123 | ||
86ef6250 | 1124 | routing_off: |
d7e09d03 PT |
1125 | if (msg->msg_peerrtrcredit) { |
1126 | /* give back peer router credits */ | |
1127 | msg->msg_peerrtrcredit = 0; | |
1128 | ||
1129 | LASSERT((rxpeer->lp_rtrcredits < 0) == | |
1130 | !list_empty(&rxpeer->lp_rtrq)); | |
1131 | ||
1132 | rxpeer->lp_rtrcredits++; | |
86ef6250 AS |
1133 | /* |
1134 | * drop all messages which are queued to be routed on that | |
1135 | * peer. | |
1136 | */ | |
1137 | if (!the_lnet.ln_routing) { | |
1138 | lnet_drop_routed_msgs_locked(&rxpeer->lp_rtrq, | |
1139 | msg->msg_rx_cpt); | |
1140 | } else if (rxpeer->lp_rtrcredits <= 0) { | |
d7e09d03 | 1141 | msg2 = list_entry(rxpeer->lp_rtrq.next, |
c314c319 | 1142 | lnet_msg_t, msg_list); |
d7e09d03 PT |
1143 | list_del(&msg2->msg_list); |
1144 | ||
1145 | (void) lnet_post_routed_recv_locked(msg2, 1); | |
1146 | } | |
1147 | } | |
06ace26e | 1148 | if (rxpeer) { |
d7e09d03 PT |
1149 | msg->msg_rxpeer = NULL; |
1150 | lnet_peer_decref_locked(rxpeer); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static int | |
1155 | lnet_compare_routes(lnet_route_t *r1, lnet_route_t *r2) | |
1156 | { | |
1157 | lnet_peer_t *p1 = r1->lr_gateway; | |
1158 | lnet_peer_t *p2 = r2->lr_gateway; | |
b9bbb61c AS |
1159 | int r1_hops = (r1->lr_hops == LNET_UNDEFINED_HOPS) ? 1 : r1->lr_hops; |
1160 | int r2_hops = (r2->lr_hops == LNET_UNDEFINED_HOPS) ? 1 : r2->lr_hops; | |
d7e09d03 | 1161 | |
e75fb87f DO |
1162 | if (r1->lr_priority < r2->lr_priority) |
1163 | return 1; | |
1164 | ||
1165 | if (r1->lr_priority > r2->lr_priority) | |
58cb2ad3 | 1166 | return -ERANGE; |
e75fb87f | 1167 | |
b9bbb61c | 1168 | if (r1_hops < r2_hops) |
d7e09d03 PT |
1169 | return 1; |
1170 | ||
b9bbb61c | 1171 | if (r1_hops > r2_hops) |
58cb2ad3 | 1172 | return -ERANGE; |
d7e09d03 PT |
1173 | |
1174 | if (p1->lp_txqnob < p2->lp_txqnob) | |
1175 | return 1; | |
1176 | ||
1177 | if (p1->lp_txqnob > p2->lp_txqnob) | |
58cb2ad3 | 1178 | return -ERANGE; |
d7e09d03 PT |
1179 | |
1180 | if (p1->lp_txcredits > p2->lp_txcredits) | |
1181 | return 1; | |
1182 | ||
1183 | if (p1->lp_txcredits < p2->lp_txcredits) | |
58cb2ad3 | 1184 | return -ERANGE; |
d7e09d03 PT |
1185 | |
1186 | if (r1->lr_seq - r2->lr_seq <= 0) | |
1187 | return 1; | |
1188 | ||
58cb2ad3 | 1189 | return -ERANGE; |
d7e09d03 PT |
1190 | } |
1191 | ||
1192 | static lnet_peer_t * | |
1193 | lnet_find_route_locked(lnet_ni_t *ni, lnet_nid_t target, lnet_nid_t rtr_nid) | |
1194 | { | |
7e7ab095 | 1195 | lnet_remotenet_t *rnet; |
4f0bedec CH |
1196 | lnet_route_t *route; |
1197 | lnet_route_t *best_route; | |
1198 | lnet_route_t *last_route; | |
7e7ab095 MS |
1199 | struct lnet_peer *lp_best; |
1200 | struct lnet_peer *lp; | |
1201 | int rc; | |
d7e09d03 | 1202 | |
4420cfd3 JS |
1203 | /* |
1204 | * If @rtr_nid is not LNET_NID_ANY, return the gateway with | |
1205 | * rtr_nid nid, otherwise find the best gateway I can use | |
1206 | */ | |
d7e09d03 | 1207 | rnet = lnet_find_net_locked(LNET_NIDNET(target)); |
06ace26e | 1208 | if (!rnet) |
d7e09d03 PT |
1209 | return NULL; |
1210 | ||
1211 | lp_best = NULL; | |
4f0bedec CH |
1212 | best_route = NULL; |
1213 | last_route = NULL; | |
1214 | list_for_each_entry(route, &rnet->lrn_routes, lr_list) { | |
1215 | lp = route->lr_gateway; | |
d7e09d03 | 1216 | |
4ee23a84 | 1217 | if (!lnet_is_route_alive(route)) |
d7e09d03 PT |
1218 | continue; |
1219 | ||
06ace26e | 1220 | if (ni && lp->lp_ni != ni) |
d7e09d03 PT |
1221 | continue; |
1222 | ||
1223 | if (lp->lp_nid == rtr_nid) /* it's pre-determined router */ | |
1224 | return lp; | |
1225 | ||
06ace26e | 1226 | if (!lp_best) { |
4f0bedec CH |
1227 | best_route = route; |
1228 | last_route = route; | |
d7e09d03 PT |
1229 | lp_best = lp; |
1230 | continue; | |
1231 | } | |
1232 | ||
1233 | /* no protection on below fields, but it's harmless */ | |
4f0bedec CH |
1234 | if (last_route->lr_seq - route->lr_seq < 0) |
1235 | last_route = route; | |
d7e09d03 | 1236 | |
4f0bedec | 1237 | rc = lnet_compare_routes(route, best_route); |
d7e09d03 PT |
1238 | if (rc < 0) |
1239 | continue; | |
1240 | ||
4f0bedec | 1241 | best_route = route; |
d7e09d03 PT |
1242 | lp_best = lp; |
1243 | } | |
1244 | ||
4420cfd3 JS |
1245 | /* |
1246 | * set sequence number on the best router to the latest sequence + 1 | |
d7e09d03 | 1247 | * so we can round-robin all routers, it's race and inaccurate but |
4420cfd3 JS |
1248 | * harmless and functional |
1249 | */ | |
4f0bedec CH |
1250 | if (best_route) |
1251 | best_route->lr_seq = last_route->lr_seq + 1; | |
d7e09d03 PT |
1252 | return lp_best; |
1253 | } | |
1254 | ||
1255 | int | |
1256 | lnet_send(lnet_nid_t src_nid, lnet_msg_t *msg, lnet_nid_t rtr_nid) | |
1257 | { | |
7e7ab095 MS |
1258 | lnet_nid_t dst_nid = msg->msg_target.nid; |
1259 | struct lnet_ni *src_ni; | |
1260 | struct lnet_ni *local_ni; | |
1261 | struct lnet_peer *lp; | |
1262 | int cpt; | |
1263 | int cpt2; | |
1264 | int rc; | |
d7e09d03 | 1265 | |
4420cfd3 JS |
1266 | /* |
1267 | * NB: rtr_nid is set to LNET_NID_ANY for all current use-cases, | |
d7e09d03 | 1268 | * but we might want to use pre-determined router for ACK/REPLY |
4420cfd3 JS |
1269 | * in the future |
1270 | */ | |
06ace26e JS |
1271 | /* NB: ni == interface pre-determined (ACK/REPLY) */ |
1272 | LASSERT(!msg->msg_txpeer); | |
af66a6e2 LN |
1273 | LASSERT(!msg->msg_sending); |
1274 | LASSERT(!msg->msg_target_is_router); | |
1275 | LASSERT(!msg->msg_receiving); | |
d7e09d03 PT |
1276 | |
1277 | msg->msg_sending = 1; | |
1278 | ||
1279 | LASSERT(!msg->msg_tx_committed); | |
1280 | cpt = lnet_cpt_of_nid(rtr_nid == LNET_NID_ANY ? dst_nid : rtr_nid); | |
1281 | again: | |
1282 | lnet_net_lock(cpt); | |
1283 | ||
1284 | if (the_lnet.ln_shutdown) { | |
1285 | lnet_net_unlock(cpt); | |
1286 | return -ESHUTDOWN; | |
1287 | } | |
1288 | ||
1289 | if (src_nid == LNET_NID_ANY) { | |
1290 | src_ni = NULL; | |
1291 | } else { | |
1292 | src_ni = lnet_nid2ni_locked(src_nid, cpt); | |
06ace26e | 1293 | if (!src_ni) { |
d7e09d03 | 1294 | lnet_net_unlock(cpt); |
2d00bd17 JP |
1295 | LCONSOLE_WARN("Can't send to %s: src %s is not a local nid\n", |
1296 | libcfs_nid2str(dst_nid), | |
d7e09d03 PT |
1297 | libcfs_nid2str(src_nid)); |
1298 | return -EINVAL; | |
1299 | } | |
af66a6e2 | 1300 | LASSERT(!msg->msg_routing); |
d7e09d03 PT |
1301 | } |
1302 | ||
1303 | /* Is this for someone on a local network? */ | |
1304 | local_ni = lnet_net2ni_locked(LNET_NIDNET(dst_nid), cpt); | |
1305 | ||
06ace26e JS |
1306 | if (local_ni) { |
1307 | if (!src_ni) { | |
d7e09d03 PT |
1308 | src_ni = local_ni; |
1309 | src_nid = src_ni->ni_nid; | |
1310 | } else if (src_ni == local_ni) { | |
1311 | lnet_ni_decref_locked(local_ni, cpt); | |
1312 | } else { | |
1313 | lnet_ni_decref_locked(local_ni, cpt); | |
1314 | lnet_ni_decref_locked(src_ni, cpt); | |
1315 | lnet_net_unlock(cpt); | |
1316 | LCONSOLE_WARN("No route to %s via from %s\n", | |
1317 | libcfs_nid2str(dst_nid), | |
1318 | libcfs_nid2str(src_nid)); | |
1319 | return -EINVAL; | |
1320 | } | |
1321 | ||
1322 | LASSERT(src_nid != LNET_NID_ANY); | |
1323 | lnet_msg_commit(msg, cpt); | |
1324 | ||
1325 | if (!msg->msg_routing) | |
1326 | msg->msg_hdr.src_nid = cpu_to_le64(src_nid); | |
1327 | ||
1328 | if (src_ni == the_lnet.ln_loni) { | |
1329 | /* No send credit hassles with LOLND */ | |
1330 | lnet_net_unlock(cpt); | |
1331 | lnet_ni_send(src_ni, msg); | |
1332 | ||
1333 | lnet_net_lock(cpt); | |
1334 | lnet_ni_decref_locked(src_ni, cpt); | |
1335 | lnet_net_unlock(cpt); | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | rc = lnet_nid2peer_locked(&lp, dst_nid, cpt); | |
1340 | /* lp has ref on src_ni; lose mine */ | |
1341 | lnet_ni_decref_locked(src_ni, cpt); | |
5fd88337 | 1342 | if (rc) { |
d7e09d03 PT |
1343 | lnet_net_unlock(cpt); |
1344 | LCONSOLE_WARN("Error %d finding peer %s\n", rc, | |
1345 | libcfs_nid2str(dst_nid)); | |
1346 | /* ENOMEM or shutting down */ | |
1347 | return rc; | |
1348 | } | |
af66a6e2 | 1349 | LASSERT(lp->lp_ni == src_ni); |
d7e09d03 PT |
1350 | } else { |
1351 | /* sending to a remote network */ | |
1352 | lp = lnet_find_route_locked(src_ni, dst_nid, rtr_nid); | |
06ace26e JS |
1353 | if (!lp) { |
1354 | if (src_ni) | |
d7e09d03 PT |
1355 | lnet_ni_decref_locked(src_ni, cpt); |
1356 | lnet_net_unlock(cpt); | |
1357 | ||
2d00bd17 | 1358 | LCONSOLE_WARN("No route to %s via %s (all routers down)\n", |
d7e09d03 PT |
1359 | libcfs_id2str(msg->msg_target), |
1360 | libcfs_nid2str(src_nid)); | |
1361 | return -EHOSTUNREACH; | |
1362 | } | |
1363 | ||
4420cfd3 JS |
1364 | /* |
1365 | * rtr_nid is LNET_NID_ANY or NID of pre-determined router, | |
d7e09d03 PT |
1366 | * it's possible that rtr_nid isn't LNET_NID_ANY and lp isn't |
1367 | * pre-determined router, this can happen if router table | |
4420cfd3 JS |
1368 | * was changed when we release the lock |
1369 | */ | |
d7e09d03 PT |
1370 | if (rtr_nid != lp->lp_nid) { |
1371 | cpt2 = lnet_cpt_of_nid_locked(lp->lp_nid); | |
1372 | if (cpt2 != cpt) { | |
06ace26e | 1373 | if (src_ni) |
d7e09d03 PT |
1374 | lnet_ni_decref_locked(src_ni, cpt); |
1375 | lnet_net_unlock(cpt); | |
1376 | ||
1377 | rtr_nid = lp->lp_nid; | |
1378 | cpt = cpt2; | |
1379 | goto again; | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | CDEBUG(D_NET, "Best route to %s via %s for %s %d\n", | |
1384 | libcfs_nid2str(dst_nid), libcfs_nid2str(lp->lp_nid), | |
1385 | lnet_msgtyp2str(msg->msg_type), msg->msg_len); | |
1386 | ||
06ace26e | 1387 | if (!src_ni) { |
d7e09d03 PT |
1388 | src_ni = lp->lp_ni; |
1389 | src_nid = src_ni->ni_nid; | |
1390 | } else { | |
af66a6e2 | 1391 | LASSERT(src_ni == lp->lp_ni); |
d7e09d03 PT |
1392 | lnet_ni_decref_locked(src_ni, cpt); |
1393 | } | |
1394 | ||
1395 | lnet_peer_addref_locked(lp); | |
1396 | ||
1397 | LASSERT(src_nid != LNET_NID_ANY); | |
1398 | lnet_msg_commit(msg, cpt); | |
1399 | ||
1400 | if (!msg->msg_routing) { | |
1401 | /* I'm the source and now I know which NI to send on */ | |
1402 | msg->msg_hdr.src_nid = cpu_to_le64(src_nid); | |
1403 | } | |
1404 | ||
1405 | msg->msg_target_is_router = 1; | |
1406 | msg->msg_target.nid = lp->lp_nid; | |
fe7cb65d | 1407 | msg->msg_target.pid = LNET_PID_LUSTRE; |
d7e09d03 PT |
1408 | } |
1409 | ||
1410 | /* 'lp' is our best choice of peer */ | |
1411 | ||
af66a6e2 LN |
1412 | LASSERT(!msg->msg_peertxcredit); |
1413 | LASSERT(!msg->msg_txcredit); | |
06ace26e | 1414 | LASSERT(!msg->msg_txpeer); |
d7e09d03 PT |
1415 | |
1416 | msg->msg_txpeer = lp; /* msg takes my ref on lp */ | |
1417 | ||
1418 | rc = lnet_post_send_locked(msg, 0); | |
1419 | lnet_net_unlock(cpt); | |
1420 | ||
ec5fb5be LZ |
1421 | if (rc < 0) |
1422 | return rc; | |
d7e09d03 | 1423 | |
ec5fb5be | 1424 | if (rc == LNET_CREDIT_OK) |
d7e09d03 PT |
1425 | lnet_ni_send(src_ni, msg); |
1426 | ||
ec5fb5be | 1427 | return 0; /* rc == LNET_CREDIT_OK or LNET_CREDIT_WAIT */ |
d7e09d03 PT |
1428 | } |
1429 | ||
b7acfc95 | 1430 | void |
d7e09d03 PT |
1431 | lnet_drop_message(lnet_ni_t *ni, int cpt, void *private, unsigned int nob) |
1432 | { | |
1433 | lnet_net_lock(cpt); | |
1434 | the_lnet.ln_counters[cpt]->drop_count++; | |
1435 | the_lnet.ln_counters[cpt]->drop_length += nob; | |
1436 | lnet_net_unlock(cpt); | |
1437 | ||
1438 | lnet_ni_recv(ni, private, NULL, 0, 0, 0, nob); | |
1439 | } | |
1440 | ||
1441 | static void | |
1442 | lnet_recv_put(lnet_ni_t *ni, lnet_msg_t *msg) | |
1443 | { | |
7e7ab095 | 1444 | lnet_hdr_t *hdr = &msg->msg_hdr; |
d7e09d03 | 1445 | |
5fd88337 | 1446 | if (msg->msg_wanted) |
d7e09d03 PT |
1447 | lnet_setpayloadbuffer(msg); |
1448 | ||
1449 | lnet_build_msg_event(msg, LNET_EVENT_PUT); | |
1450 | ||
4420cfd3 JS |
1451 | /* |
1452 | * Must I ACK? If so I'll grab the ack_wmd out of the header and put | |
1453 | * it back into the ACK during lnet_finalize() | |
1454 | */ | |
5fd88337 JS |
1455 | msg->msg_ack = !lnet_is_wire_handle_none(&hdr->msg.put.ack_wmd) && |
1456 | !(msg->msg_md->md_options & LNET_MD_ACK_DISABLE); | |
d7e09d03 PT |
1457 | |
1458 | lnet_ni_recv(ni, msg->msg_private, msg, msg->msg_rx_delayed, | |
1459 | msg->msg_offset, msg->msg_wanted, hdr->payload_length); | |
1460 | } | |
1461 | ||
1462 | static int | |
1463 | lnet_parse_put(lnet_ni_t *ni, lnet_msg_t *msg) | |
1464 | { | |
7e7ab095 MS |
1465 | lnet_hdr_t *hdr = &msg->msg_hdr; |
1466 | struct lnet_match_info info; | |
5b16d52b | 1467 | bool ready_delay; |
7e7ab095 | 1468 | int rc; |
d7e09d03 PT |
1469 | |
1470 | /* Convert put fields to host byte order */ | |
1471 | hdr->msg.put.match_bits = le64_to_cpu(hdr->msg.put.match_bits); | |
1472 | hdr->msg.put.ptl_index = le32_to_cpu(hdr->msg.put.ptl_index); | |
1473 | hdr->msg.put.offset = le32_to_cpu(hdr->msg.put.offset); | |
1474 | ||
1475 | info.mi_id.nid = hdr->src_nid; | |
1476 | info.mi_id.pid = hdr->src_pid; | |
1477 | info.mi_opc = LNET_MD_OP_PUT; | |
1478 | info.mi_portal = hdr->msg.put.ptl_index; | |
1479 | info.mi_rlength = hdr->payload_length; | |
1480 | info.mi_roffset = hdr->msg.put.offset; | |
1481 | info.mi_mbits = hdr->msg.put.match_bits; | |
1482 | ||
06ace26e | 1483 | msg->msg_rx_ready_delay = !ni->ni_lnd->lnd_eager_recv; |
5b16d52b | 1484 | ready_delay = msg->msg_rx_ready_delay; |
d7e09d03 PT |
1485 | |
1486 | again: | |
1487 | rc = lnet_ptl_match_md(&info, msg); | |
1488 | switch (rc) { | |
1489 | default: | |
1490 | LBUG(); | |
1491 | ||
1492 | case LNET_MATCHMD_OK: | |
1493 | lnet_recv_put(ni, msg); | |
1494 | return 0; | |
1495 | ||
1496 | case LNET_MATCHMD_NONE: | |
5b16d52b LZ |
1497 | /** |
1498 | * no eager_recv or has already called it, should | |
1499 | * have been attached on delayed list | |
1500 | */ | |
1501 | if (ready_delay) | |
d7e09d03 PT |
1502 | return 0; |
1503 | ||
1504 | rc = lnet_ni_eager_recv(ni, msg); | |
5b16d52b LZ |
1505 | if (!rc) { |
1506 | ready_delay = true; | |
d7e09d03 | 1507 | goto again; |
5b16d52b | 1508 | } |
d7e09d03 PT |
1509 | /* fall through */ |
1510 | ||
1511 | case LNET_MATCHMD_DROP: | |
b0f5aad5 | 1512 | CNETERR("Dropping PUT from %s portal %d match %llu offset %d length %d: %d\n", |
d7e09d03 PT |
1513 | libcfs_id2str(info.mi_id), info.mi_portal, |
1514 | info.mi_mbits, info.mi_roffset, info.mi_rlength, rc); | |
1515 | ||
58cb2ad3 | 1516 | return -ENOENT; /* -ve: OK but no match */ |
d7e09d03 PT |
1517 | } |
1518 | } | |
1519 | ||
1520 | static int | |
1521 | lnet_parse_get(lnet_ni_t *ni, lnet_msg_t *msg, int rdma_get) | |
1522 | { | |
7e7ab095 MS |
1523 | struct lnet_match_info info; |
1524 | lnet_hdr_t *hdr = &msg->msg_hdr; | |
1525 | lnet_handle_wire_t reply_wmd; | |
1526 | int rc; | |
d7e09d03 PT |
1527 | |
1528 | /* Convert get fields to host byte order */ | |
7e7ab095 MS |
1529 | hdr->msg.get.match_bits = le64_to_cpu(hdr->msg.get.match_bits); |
1530 | hdr->msg.get.ptl_index = le32_to_cpu(hdr->msg.get.ptl_index); | |
1531 | hdr->msg.get.sink_length = le32_to_cpu(hdr->msg.get.sink_length); | |
1532 | hdr->msg.get.src_offset = le32_to_cpu(hdr->msg.get.src_offset); | |
1533 | ||
1534 | info.mi_id.nid = hdr->src_nid; | |
1535 | info.mi_id.pid = hdr->src_pid; | |
1536 | info.mi_opc = LNET_MD_OP_GET; | |
1537 | info.mi_portal = hdr->msg.get.ptl_index; | |
1538 | info.mi_rlength = hdr->msg.get.sink_length; | |
1539 | info.mi_roffset = hdr->msg.get.src_offset; | |
1540 | info.mi_mbits = hdr->msg.get.match_bits; | |
d7e09d03 PT |
1541 | |
1542 | rc = lnet_ptl_match_md(&info, msg); | |
1543 | if (rc == LNET_MATCHMD_DROP) { | |
b0f5aad5 | 1544 | CNETERR("Dropping GET from %s portal %d match %llu offset %d length %d\n", |
d7e09d03 PT |
1545 | libcfs_id2str(info.mi_id), info.mi_portal, |
1546 | info.mi_mbits, info.mi_roffset, info.mi_rlength); | |
58cb2ad3 | 1547 | return -ENOENT; /* -ve: OK but no match */ |
d7e09d03 PT |
1548 | } |
1549 | ||
1550 | LASSERT(rc == LNET_MATCHMD_OK); | |
1551 | ||
1552 | lnet_build_msg_event(msg, LNET_EVENT_GET); | |
1553 | ||
1554 | reply_wmd = hdr->msg.get.return_wmd; | |
1555 | ||
1556 | lnet_prep_send(msg, LNET_MSG_REPLY, info.mi_id, | |
1557 | msg->msg_offset, msg->msg_wanted); | |
1558 | ||
1559 | msg->msg_hdr.msg.reply.dst_wmd = reply_wmd; | |
1560 | ||
1561 | if (rdma_get) { | |
1562 | /* The LND completes the REPLY from her recv procedure */ | |
1563 | lnet_ni_recv(ni, msg->msg_private, msg, 0, | |
1564 | msg->msg_offset, msg->msg_len, msg->msg_len); | |
1565 | return 0; | |
1566 | } | |
1567 | ||
1568 | lnet_ni_recv(ni, msg->msg_private, NULL, 0, 0, 0, 0); | |
1569 | msg->msg_receiving = 0; | |
1570 | ||
1571 | rc = lnet_send(ni->ni_nid, msg, LNET_NID_ANY); | |
1572 | if (rc < 0) { | |
1573 | /* didn't get as far as lnet_ni_send() */ | |
1574 | CERROR("%s: Unable to send REPLY for GET from %s: %d\n", | |
1575 | libcfs_nid2str(ni->ni_nid), | |
1576 | libcfs_id2str(info.mi_id), rc); | |
1577 | ||
1578 | lnet_finalize(ni, msg, rc); | |
1579 | } | |
1580 | ||
1581 | return 0; | |
1582 | } | |
1583 | ||
1584 | static int | |
1585 | lnet_parse_reply(lnet_ni_t *ni, lnet_msg_t *msg) | |
1586 | { | |
7e7ab095 MS |
1587 | void *private = msg->msg_private; |
1588 | lnet_hdr_t *hdr = &msg->msg_hdr; | |
d7e09d03 | 1589 | lnet_process_id_t src = {0}; |
7e7ab095 MS |
1590 | lnet_libmd_t *md; |
1591 | int rlength; | |
1592 | int mlength; | |
1593 | int cpt; | |
d7e09d03 PT |
1594 | |
1595 | cpt = lnet_cpt_of_cookie(hdr->msg.reply.dst_wmd.wh_object_cookie); | |
1596 | lnet_res_lock(cpt); | |
1597 | ||
1598 | src.nid = hdr->src_nid; | |
1599 | src.pid = hdr->src_pid; | |
1600 | ||
1601 | /* NB handles only looked up by creator (no flips) */ | |
1602 | md = lnet_wire_handle2md(&hdr->msg.reply.dst_wmd); | |
5fd88337 | 1603 | if (!md || !md->md_threshold || md->md_me) { |
55f5a824 | 1604 | CNETERR("%s: Dropping REPLY from %s for %s MD %#llx.%#llx\n", |
d7e09d03 | 1605 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), |
06ace26e | 1606 | !md ? "invalid" : "inactive", |
d7e09d03 PT |
1607 | hdr->msg.reply.dst_wmd.wh_interface_cookie, |
1608 | hdr->msg.reply.dst_wmd.wh_object_cookie); | |
06ace26e | 1609 | if (md && md->md_me) |
d7e09d03 PT |
1610 | CERROR("REPLY MD also attached to portal %d\n", |
1611 | md->md_me->me_portal); | |
1612 | ||
1613 | lnet_res_unlock(cpt); | |
58cb2ad3 | 1614 | return -ENOENT; /* -ve: OK but no match */ |
d7e09d03 PT |
1615 | } |
1616 | ||
5fd88337 | 1617 | LASSERT(!md->md_offset); |
d7e09d03 PT |
1618 | |
1619 | rlength = hdr->payload_length; | |
005b23d6 | 1620 | mlength = min_t(uint, rlength, md->md_length); |
d7e09d03 PT |
1621 | |
1622 | if (mlength < rlength && | |
5fd88337 | 1623 | !(md->md_options & LNET_MD_TRUNCATE)) { |
55f5a824 | 1624 | CNETERR("%s: Dropping REPLY from %s length %d for MD %#llx would overflow (%d)\n", |
d7e09d03 PT |
1625 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), |
1626 | rlength, hdr->msg.reply.dst_wmd.wh_object_cookie, | |
1627 | mlength); | |
1628 | lnet_res_unlock(cpt); | |
58cb2ad3 | 1629 | return -ENOENT; /* -ve: OK but no match */ |
d7e09d03 PT |
1630 | } |
1631 | ||
55f5a824 | 1632 | CDEBUG(D_NET, "%s: Reply from %s of length %d/%d into md %#llx\n", |
d7e09d03 PT |
1633 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), |
1634 | mlength, rlength, hdr->msg.reply.dst_wmd.wh_object_cookie); | |
1635 | ||
1636 | lnet_msg_attach_md(msg, md, 0, mlength); | |
1637 | ||
5fd88337 | 1638 | if (mlength) |
d7e09d03 PT |
1639 | lnet_setpayloadbuffer(msg); |
1640 | ||
1641 | lnet_res_unlock(cpt); | |
1642 | ||
1643 | lnet_build_msg_event(msg, LNET_EVENT_REPLY); | |
1644 | ||
1645 | lnet_ni_recv(ni, private, msg, 0, 0, mlength, rlength); | |
1646 | return 0; | |
1647 | } | |
1648 | ||
1649 | static int | |
1650 | lnet_parse_ack(lnet_ni_t *ni, lnet_msg_t *msg) | |
1651 | { | |
7e7ab095 | 1652 | lnet_hdr_t *hdr = &msg->msg_hdr; |
d7e09d03 | 1653 | lnet_process_id_t src = {0}; |
7e7ab095 MS |
1654 | lnet_libmd_t *md; |
1655 | int cpt; | |
d7e09d03 PT |
1656 | |
1657 | src.nid = hdr->src_nid; | |
1658 | src.pid = hdr->src_pid; | |
1659 | ||
1660 | /* Convert ack fields to host byte order */ | |
1661 | hdr->msg.ack.match_bits = le64_to_cpu(hdr->msg.ack.match_bits); | |
1662 | hdr->msg.ack.mlength = le32_to_cpu(hdr->msg.ack.mlength); | |
1663 | ||
1664 | cpt = lnet_cpt_of_cookie(hdr->msg.ack.dst_wmd.wh_object_cookie); | |
1665 | lnet_res_lock(cpt); | |
1666 | ||
1667 | /* NB handles only looked up by creator (no flips) */ | |
1668 | md = lnet_wire_handle2md(&hdr->msg.ack.dst_wmd); | |
5fd88337 | 1669 | if (!md || !md->md_threshold || md->md_me) { |
d7e09d03 PT |
1670 | /* Don't moan; this is expected */ |
1671 | CDEBUG(D_NET, | |
55f5a824 | 1672 | "%s: Dropping ACK from %s to %s MD %#llx.%#llx\n", |
d7e09d03 | 1673 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), |
06ace26e | 1674 | !md ? "invalid" : "inactive", |
d7e09d03 PT |
1675 | hdr->msg.ack.dst_wmd.wh_interface_cookie, |
1676 | hdr->msg.ack.dst_wmd.wh_object_cookie); | |
06ace26e | 1677 | if (md && md->md_me) |
d7e09d03 PT |
1678 | CERROR("Source MD also attached to portal %d\n", |
1679 | md->md_me->me_portal); | |
1680 | ||
1681 | lnet_res_unlock(cpt); | |
58cb2ad3 | 1682 | return -ENOENT; /* -ve! */ |
d7e09d03 PT |
1683 | } |
1684 | ||
55f5a824 | 1685 | CDEBUG(D_NET, "%s: ACK from %s into md %#llx\n", |
d7e09d03 PT |
1686 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), |
1687 | hdr->msg.ack.dst_wmd.wh_object_cookie); | |
1688 | ||
1689 | lnet_msg_attach_md(msg, md, 0, 0); | |
1690 | ||
1691 | lnet_res_unlock(cpt); | |
1692 | ||
1693 | lnet_build_msg_event(msg, LNET_EVENT_ACK); | |
1694 | ||
1695 | lnet_ni_recv(ni, msg->msg_private, msg, 0, 0, 0, msg->msg_len); | |
1696 | return 0; | |
1697 | } | |
1698 | ||
ec5fb5be LZ |
1699 | /** |
1700 | * \retval LNET_CREDIT_OK If \a msg is forwarded | |
1701 | * \retval LNET_CREDIT_WAIT If \a msg is blocked because w/o buffer | |
1702 | * \retval -ve error code | |
1703 | */ | |
b7acfc95 | 1704 | int |
d7e09d03 PT |
1705 | lnet_parse_forward_locked(lnet_ni_t *ni, lnet_msg_t *msg) |
1706 | { | |
7e7ab095 | 1707 | int rc = 0; |
d7e09d03 | 1708 | |
86ef6250 AS |
1709 | if (!the_lnet.ln_routing) |
1710 | return -ECANCELED; | |
1711 | ||
d7e09d03 PT |
1712 | if (msg->msg_rxpeer->lp_rtrcredits <= 0 || |
1713 | lnet_msg2bufpool(msg)->rbp_credits <= 0) { | |
06ace26e | 1714 | if (!ni->ni_lnd->lnd_eager_recv) { |
d7e09d03 PT |
1715 | msg->msg_rx_ready_delay = 1; |
1716 | } else { | |
1717 | lnet_net_unlock(msg->msg_rx_cpt); | |
1718 | rc = lnet_ni_eager_recv(ni, msg); | |
1719 | lnet_net_lock(msg->msg_rx_cpt); | |
1720 | } | |
1721 | } | |
1722 | ||
5fd88337 | 1723 | if (!rc) |
d7e09d03 PT |
1724 | rc = lnet_post_routed_recv_locked(msg, 0); |
1725 | return rc; | |
1726 | } | |
1727 | ||
b7acfc95 LZ |
1728 | int |
1729 | lnet_parse_local(lnet_ni_t *ni, lnet_msg_t *msg) | |
1730 | { | |
1731 | int rc; | |
1732 | ||
1733 | switch (msg->msg_type) { | |
1734 | case LNET_MSG_ACK: | |
1735 | rc = lnet_parse_ack(ni, msg); | |
1736 | break; | |
1737 | case LNET_MSG_PUT: | |
1738 | rc = lnet_parse_put(ni, msg); | |
1739 | break; | |
1740 | case LNET_MSG_GET: | |
1741 | rc = lnet_parse_get(ni, msg, msg->msg_rdma_get); | |
1742 | break; | |
1743 | case LNET_MSG_REPLY: | |
1744 | rc = lnet_parse_reply(ni, msg); | |
1745 | break; | |
1746 | default: /* prevent an unused label if !kernel */ | |
1747 | LASSERT(0); | |
1748 | return -EPROTO; | |
1749 | } | |
1750 | ||
1751 | LASSERT(!rc || rc == -ENOENT); | |
1752 | return rc; | |
1753 | } | |
1754 | ||
d7e09d03 | 1755 | char * |
af66a6e2 | 1756 | lnet_msgtyp2str(int type) |
d7e09d03 PT |
1757 | { |
1758 | switch (type) { | |
1759 | case LNET_MSG_ACK: | |
2b5f2e44 | 1760 | return "ACK"; |
d7e09d03 | 1761 | case LNET_MSG_PUT: |
2b5f2e44 | 1762 | return "PUT"; |
d7e09d03 | 1763 | case LNET_MSG_GET: |
2b5f2e44 | 1764 | return "GET"; |
d7e09d03 | 1765 | case LNET_MSG_REPLY: |
2b5f2e44 | 1766 | return "REPLY"; |
d7e09d03 | 1767 | case LNET_MSG_HELLO: |
2b5f2e44 | 1768 | return "HELLO"; |
d7e09d03 | 1769 | default: |
2b5f2e44 | 1770 | return "<UNKNOWN>"; |
d7e09d03 PT |
1771 | } |
1772 | } | |
d7e09d03 PT |
1773 | |
1774 | void | |
51f01fab | 1775 | lnet_print_hdr(lnet_hdr_t *hdr) |
d7e09d03 PT |
1776 | { |
1777 | lnet_process_id_t src = {0}; | |
1778 | lnet_process_id_t dst = {0}; | |
af66a6e2 | 1779 | char *type_str = lnet_msgtyp2str(hdr->type); |
d7e09d03 PT |
1780 | |
1781 | src.nid = hdr->src_nid; | |
1782 | src.pid = hdr->src_pid; | |
1783 | ||
1784 | dst.nid = hdr->dest_nid; | |
1785 | dst.pid = hdr->dest_pid; | |
1786 | ||
1787 | CWARN("P3 Header at %p of type %s\n", hdr, type_str); | |
1788 | CWARN(" From %s\n", libcfs_id2str(src)); | |
1789 | CWARN(" To %s\n", libcfs_id2str(dst)); | |
1790 | ||
1791 | switch (hdr->type) { | |
1792 | default: | |
1793 | break; | |
1794 | ||
1795 | case LNET_MSG_PUT: | |
2d00bd17 | 1796 | CWARN(" Ptl index %d, ack md %#llx.%#llx, match bits %llu\n", |
d7e09d03 PT |
1797 | hdr->msg.put.ptl_index, |
1798 | hdr->msg.put.ack_wmd.wh_interface_cookie, | |
1799 | hdr->msg.put.ack_wmd.wh_object_cookie, | |
1800 | hdr->msg.put.match_bits); | |
55f5a824 | 1801 | CWARN(" Length %d, offset %d, hdr data %#llx\n", |
d7e09d03 PT |
1802 | hdr->payload_length, hdr->msg.put.offset, |
1803 | hdr->msg.put.hdr_data); | |
1804 | break; | |
1805 | ||
1806 | case LNET_MSG_GET: | |
2d00bd17 JP |
1807 | CWARN(" Ptl index %d, return md %#llx.%#llx, match bits %llu\n", |
1808 | hdr->msg.get.ptl_index, | |
d7e09d03 PT |
1809 | hdr->msg.get.return_wmd.wh_interface_cookie, |
1810 | hdr->msg.get.return_wmd.wh_object_cookie, | |
1811 | hdr->msg.get.match_bits); | |
1812 | CWARN(" Length %d, src offset %d\n", | |
1813 | hdr->msg.get.sink_length, | |
1814 | hdr->msg.get.src_offset); | |
1815 | break; | |
1816 | ||
1817 | case LNET_MSG_ACK: | |
2d00bd17 | 1818 | CWARN(" dst md %#llx.%#llx, manipulated length %d\n", |
d7e09d03 PT |
1819 | hdr->msg.ack.dst_wmd.wh_interface_cookie, |
1820 | hdr->msg.ack.dst_wmd.wh_object_cookie, | |
1821 | hdr->msg.ack.mlength); | |
1822 | break; | |
1823 | ||
1824 | case LNET_MSG_REPLY: | |
2d00bd17 | 1825 | CWARN(" dst md %#llx.%#llx, length %d\n", |
d7e09d03 PT |
1826 | hdr->msg.reply.dst_wmd.wh_interface_cookie, |
1827 | hdr->msg.reply.dst_wmd.wh_object_cookie, | |
1828 | hdr->payload_length); | |
1829 | } | |
d7e09d03 PT |
1830 | } |
1831 | ||
1832 | int | |
1833 | lnet_parse(lnet_ni_t *ni, lnet_hdr_t *hdr, lnet_nid_t from_nid, | |
1834 | void *private, int rdma_req) | |
1835 | { | |
7e7ab095 MS |
1836 | int rc = 0; |
1837 | int cpt; | |
1838 | int for_me; | |
1839 | struct lnet_msg *msg; | |
1840 | lnet_pid_t dest_pid; | |
1841 | lnet_nid_t dest_nid; | |
1842 | lnet_nid_t src_nid; | |
1843 | __u32 payload_length; | |
1844 | __u32 type; | |
d7e09d03 | 1845 | |
af66a6e2 | 1846 | LASSERT(!in_interrupt()); |
d7e09d03 PT |
1847 | |
1848 | type = le32_to_cpu(hdr->type); | |
1849 | src_nid = le64_to_cpu(hdr->src_nid); | |
1850 | dest_nid = le64_to_cpu(hdr->dest_nid); | |
1851 | dest_pid = le32_to_cpu(hdr->dest_pid); | |
1852 | payload_length = le32_to_cpu(hdr->payload_length); | |
1853 | ||
1854 | for_me = (ni->ni_nid == dest_nid); | |
1855 | cpt = lnet_cpt_of_nid(from_nid); | |
1856 | ||
1857 | switch (type) { | |
1858 | case LNET_MSG_ACK: | |
1859 | case LNET_MSG_GET: | |
1860 | if (payload_length > 0) { | |
1861 | CERROR("%s, src %s: bad %s payload %d (0 expected)\n", | |
1862 | libcfs_nid2str(from_nid), | |
1863 | libcfs_nid2str(src_nid), | |
1864 | lnet_msgtyp2str(type), payload_length); | |
1865 | return -EPROTO; | |
1866 | } | |
1867 | break; | |
1868 | ||
1869 | case LNET_MSG_PUT: | |
1870 | case LNET_MSG_REPLY: | |
ae4003f0 LN |
1871 | if (payload_length > |
1872 | (__u32)(for_me ? LNET_MAX_PAYLOAD : LNET_MTU)) { | |
2d00bd17 | 1873 | CERROR("%s, src %s: bad %s payload %d (%d max expected)\n", |
d7e09d03 PT |
1874 | libcfs_nid2str(from_nid), |
1875 | libcfs_nid2str(src_nid), | |
1876 | lnet_msgtyp2str(type), | |
1877 | payload_length, | |
1878 | for_me ? LNET_MAX_PAYLOAD : LNET_MTU); | |
1879 | return -EPROTO; | |
1880 | } | |
1881 | break; | |
1882 | ||
1883 | default: | |
1884 | CERROR("%s, src %s: Bad message type 0x%x\n", | |
1885 | libcfs_nid2str(from_nid), | |
1886 | libcfs_nid2str(src_nid), type); | |
1887 | return -EPROTO; | |
1888 | } | |
1889 | ||
1890 | if (the_lnet.ln_routing && | |
ec0067d1 | 1891 | ni->ni_last_alive != ktime_get_real_seconds()) { |
d7e09d03 | 1892 | /* NB: so far here is the only place to set NI status to "up */ |
86ef6250 | 1893 | lnet_ni_lock(ni); |
ec0067d1 | 1894 | ni->ni_last_alive = ktime_get_real_seconds(); |
06ace26e | 1895 | if (ni->ni_status && |
d7e09d03 PT |
1896 | ni->ni_status->ns_status == LNET_NI_STATUS_DOWN) |
1897 | ni->ni_status->ns_status = LNET_NI_STATUS_UP; | |
1898 | lnet_ni_unlock(ni); | |
1899 | } | |
1900 | ||
4420cfd3 JS |
1901 | /* |
1902 | * Regard a bad destination NID as a protocol error. Senders should | |
d7e09d03 | 1903 | * know what they're doing; if they don't they're misconfigured, buggy |
4420cfd3 JS |
1904 | * or malicious so we chop them off at the knees :) |
1905 | */ | |
d7e09d03 PT |
1906 | if (!for_me) { |
1907 | if (LNET_NIDNET(dest_nid) == LNET_NIDNET(ni->ni_nid)) { | |
1908 | /* should have gone direct */ | |
2d00bd17 JP |
1909 | CERROR("%s, src %s: Bad dest nid %s (should have been sent direct)\n", |
1910 | libcfs_nid2str(from_nid), | |
1911 | libcfs_nid2str(src_nid), | |
1912 | libcfs_nid2str(dest_nid)); | |
d7e09d03 PT |
1913 | return -EPROTO; |
1914 | } | |
1915 | ||
1916 | if (lnet_islocalnid(dest_nid)) { | |
4420cfd3 JS |
1917 | /* |
1918 | * dest is another local NI; sender should have used | |
1919 | * this node's NID on its own network | |
1920 | */ | |
2d00bd17 JP |
1921 | CERROR("%s, src %s: Bad dest nid %s (it's my nid but on a different network)\n", |
1922 | libcfs_nid2str(from_nid), | |
1923 | libcfs_nid2str(src_nid), | |
1924 | libcfs_nid2str(dest_nid)); | |
d7e09d03 PT |
1925 | return -EPROTO; |
1926 | } | |
1927 | ||
1928 | if (rdma_req && type == LNET_MSG_GET) { | |
2d00bd17 JP |
1929 | CERROR("%s, src %s: Bad optimized GET for %s (final destination must be me)\n", |
1930 | libcfs_nid2str(from_nid), | |
1931 | libcfs_nid2str(src_nid), | |
1932 | libcfs_nid2str(dest_nid)); | |
d7e09d03 PT |
1933 | return -EPROTO; |
1934 | } | |
1935 | ||
1936 | if (!the_lnet.ln_routing) { | |
2d00bd17 JP |
1937 | CERROR("%s, src %s: Dropping message for %s (routing not enabled)\n", |
1938 | libcfs_nid2str(from_nid), | |
1939 | libcfs_nid2str(src_nid), | |
1940 | libcfs_nid2str(dest_nid)); | |
d7e09d03 PT |
1941 | goto drop; |
1942 | } | |
1943 | } | |
1944 | ||
4420cfd3 JS |
1945 | /* |
1946 | * Message looks OK; we're not going to return an error, so we MUST | |
1947 | * call back lnd_recv() come what may... | |
1948 | */ | |
af66a6e2 | 1949 | if (!list_empty(&the_lnet.ln_test_peers) && /* normally we don't */ |
9b79ca85 | 1950 | fail_peer(src_nid, 0)) { /* shall we now? */ |
d7e09d03 PT |
1951 | CERROR("%s, src %s: Dropping %s to simulate failure\n", |
1952 | libcfs_nid2str(from_nid), libcfs_nid2str(src_nid), | |
1953 | lnet_msgtyp2str(type)); | |
1954 | goto drop; | |
1955 | } | |
1956 | ||
0fbbced2 LZ |
1957 | if (!list_empty(&the_lnet.ln_drop_rules) && |
1958 | lnet_drop_rule_match(hdr)) { | |
1959 | CDEBUG(D_NET, "%s, src %s, dst %s: Dropping %s to simulate silent message loss\n", | |
1960 | libcfs_nid2str(from_nid), libcfs_nid2str(src_nid), | |
1961 | libcfs_nid2str(dest_nid), lnet_msgtyp2str(type)); | |
1962 | goto drop; | |
1963 | } | |
1964 | ||
d7e09d03 | 1965 | msg = lnet_msg_alloc(); |
06ace26e | 1966 | if (!msg) { |
d7e09d03 PT |
1967 | CERROR("%s, src %s: Dropping %s (out of memory)\n", |
1968 | libcfs_nid2str(from_nid), libcfs_nid2str(src_nid), | |
1969 | lnet_msgtyp2str(type)); | |
1970 | goto drop; | |
1971 | } | |
1972 | ||
ae4003f0 LN |
1973 | /* msg zeroed in lnet_msg_alloc; |
1974 | * i.e. flags all clear, pointers NULL etc | |
1975 | */ | |
d7e09d03 PT |
1976 | msg->msg_type = type; |
1977 | msg->msg_private = private; | |
1978 | msg->msg_receiving = 1; | |
b7acfc95 | 1979 | msg->msg_rdma_get = rdma_req; |
d3d3d37a JS |
1980 | msg->msg_wanted = payload_length; |
1981 | msg->msg_len = payload_length; | |
d7e09d03 PT |
1982 | msg->msg_offset = 0; |
1983 | msg->msg_hdr = *hdr; | |
1984 | /* for building message event */ | |
1985 | msg->msg_from = from_nid; | |
1986 | if (!for_me) { | |
1987 | msg->msg_target.pid = dest_pid; | |
1988 | msg->msg_target.nid = dest_nid; | |
1989 | msg->msg_routing = 1; | |
1990 | ||
1991 | } else { | |
1992 | /* convert common msg->hdr fields to host byteorder */ | |
1993 | msg->msg_hdr.type = type; | |
1994 | msg->msg_hdr.src_nid = src_nid; | |
1995 | msg->msg_hdr.src_pid = le32_to_cpu(msg->msg_hdr.src_pid); | |
1996 | msg->msg_hdr.dest_nid = dest_nid; | |
1997 | msg->msg_hdr.dest_pid = dest_pid; | |
1998 | msg->msg_hdr.payload_length = payload_length; | |
1999 | } | |
2000 | ||
2001 | lnet_net_lock(cpt); | |
2002 | rc = lnet_nid2peer_locked(&msg->msg_rxpeer, from_nid, cpt); | |
5fd88337 | 2003 | if (rc) { |
d7e09d03 | 2004 | lnet_net_unlock(cpt); |
2d00bd17 | 2005 | CERROR("%s, src %s: Dropping %s (error %d looking up sender)\n", |
d7e09d03 PT |
2006 | libcfs_nid2str(from_nid), libcfs_nid2str(src_nid), |
2007 | lnet_msgtyp2str(type), rc); | |
2008 | lnet_msg_free(msg); | |
2009 | goto drop; | |
2010 | } | |
2011 | ||
af3fa7c7 LZ |
2012 | if (lnet_isrouter(msg->msg_rxpeer)) { |
2013 | lnet_peer_set_alive(msg->msg_rxpeer); | |
2014 | if (avoid_asym_router_failure && | |
2015 | LNET_NIDNET(src_nid) != LNET_NIDNET(from_nid)) { | |
2016 | /* received a remote message from router, update | |
2017 | * remote NI status on this router. | |
2018 | * NB: multi-hop routed message will be ignored. | |
2019 | */ | |
2020 | lnet_router_ni_update_locked(msg->msg_rxpeer, | |
2021 | LNET_NIDNET(src_nid)); | |
2022 | } | |
2023 | } | |
2024 | ||
d7e09d03 PT |
2025 | lnet_msg_commit(msg, cpt); |
2026 | ||
b7acfc95 LZ |
2027 | /* message delay simulation */ |
2028 | if (unlikely(!list_empty(&the_lnet.ln_delay_rules) && | |
2029 | lnet_delay_rule_match_locked(hdr, msg))) { | |
2030 | lnet_net_unlock(cpt); | |
2031 | return 0; | |
2032 | } | |
2033 | ||
d7e09d03 PT |
2034 | if (!for_me) { |
2035 | rc = lnet_parse_forward_locked(ni, msg); | |
2036 | lnet_net_unlock(cpt); | |
2037 | ||
2038 | if (rc < 0) | |
2039 | goto free_drop; | |
ec5fb5be LZ |
2040 | |
2041 | if (rc == LNET_CREDIT_OK) { | |
d7e09d03 PT |
2042 | lnet_ni_recv(ni, msg->msg_private, msg, 0, |
2043 | 0, payload_length, payload_length); | |
2044 | } | |
2045 | return 0; | |
2046 | } | |
2047 | ||
2048 | lnet_net_unlock(cpt); | |
2049 | ||
b7acfc95 LZ |
2050 | rc = lnet_parse_local(ni, msg); |
2051 | if (rc) | |
2052 | goto free_drop; | |
2053 | return 0; | |
d7e09d03 PT |
2054 | |
2055 | free_drop: | |
06ace26e | 2056 | LASSERT(!msg->msg_md); |
d7e09d03 PT |
2057 | lnet_finalize(ni, msg, rc); |
2058 | ||
2059 | drop: | |
2060 | lnet_drop_message(ni, cpt, private, payload_length); | |
2061 | return 0; | |
2062 | } | |
2063 | EXPORT_SYMBOL(lnet_parse); | |
2064 | ||
2065 | void | |
2066 | lnet_drop_delayed_msg_list(struct list_head *head, char *reason) | |
2067 | { | |
2068 | while (!list_empty(head)) { | |
7e7ab095 MS |
2069 | lnet_process_id_t id = {0}; |
2070 | lnet_msg_t *msg; | |
d7e09d03 PT |
2071 | |
2072 | msg = list_entry(head->next, lnet_msg_t, msg_list); | |
2073 | list_del(&msg->msg_list); | |
2074 | ||
2075 | id.nid = msg->msg_hdr.src_nid; | |
2076 | id.pid = msg->msg_hdr.src_pid; | |
2077 | ||
06ace26e | 2078 | LASSERT(!msg->msg_md); |
d7e09d03 | 2079 | LASSERT(msg->msg_rx_delayed); |
06ace26e | 2080 | LASSERT(msg->msg_rxpeer); |
d7e09d03 PT |
2081 | LASSERT(msg->msg_hdr.type == LNET_MSG_PUT); |
2082 | ||
b0f5aad5 | 2083 | CWARN("Dropping delayed PUT from %s portal %d match %llu offset %d length %d: %s\n", |
d7e09d03 PT |
2084 | libcfs_id2str(id), |
2085 | msg->msg_hdr.msg.put.ptl_index, | |
2086 | msg->msg_hdr.msg.put.match_bits, | |
2087 | msg->msg_hdr.msg.put.offset, | |
2088 | msg->msg_hdr.payload_length, reason); | |
2089 | ||
4420cfd3 JS |
2090 | /* |
2091 | * NB I can't drop msg's ref on msg_rxpeer until after I've | |
d7e09d03 | 2092 | * called lnet_drop_message(), so I just hang onto msg as well |
4420cfd3 JS |
2093 | * until that's done |
2094 | */ | |
d7e09d03 PT |
2095 | lnet_drop_message(msg->msg_rxpeer->lp_ni, |
2096 | msg->msg_rxpeer->lp_cpt, | |
2097 | msg->msg_private, msg->msg_len); | |
2098 | /* | |
2099 | * NB: message will not generate event because w/o attached MD, | |
2100 | * but we still should give error code so lnet_msg_decommit() | |
2101 | * can skip counters operations and other checks. | |
2102 | */ | |
2103 | lnet_finalize(msg->msg_rxpeer->lp_ni, msg, -ENOENT); | |
2104 | } | |
2105 | } | |
2106 | ||
2107 | void | |
2108 | lnet_recv_delayed_msg_list(struct list_head *head) | |
2109 | { | |
2110 | while (!list_empty(head)) { | |
7e7ab095 MS |
2111 | lnet_msg_t *msg; |
2112 | lnet_process_id_t id; | |
d7e09d03 PT |
2113 | |
2114 | msg = list_entry(head->next, lnet_msg_t, msg_list); | |
2115 | list_del(&msg->msg_list); | |
2116 | ||
4420cfd3 JS |
2117 | /* |
2118 | * md won't disappear under me, since each msg | |
2119 | * holds a ref on it | |
2120 | */ | |
d7e09d03 PT |
2121 | id.nid = msg->msg_hdr.src_nid; |
2122 | id.pid = msg->msg_hdr.src_pid; | |
2123 | ||
2124 | LASSERT(msg->msg_rx_delayed); | |
06ace26e JS |
2125 | LASSERT(msg->msg_md); |
2126 | LASSERT(msg->msg_rxpeer); | |
d7e09d03 PT |
2127 | LASSERT(msg->msg_hdr.type == LNET_MSG_PUT); |
2128 | ||
2d00bd17 JP |
2129 | CDEBUG(D_NET, "Resuming delayed PUT from %s portal %d match %llu offset %d length %d.\n", |
2130 | libcfs_id2str(id), msg->msg_hdr.msg.put.ptl_index, | |
2131 | msg->msg_hdr.msg.put.match_bits, | |
2132 | msg->msg_hdr.msg.put.offset, | |
2133 | msg->msg_hdr.payload_length); | |
d7e09d03 PT |
2134 | |
2135 | lnet_recv_put(msg->msg_rxpeer->lp_ni, msg); | |
2136 | } | |
2137 | } | |
2138 | ||
2139 | /** | |
2140 | * Initiate an asynchronous PUT operation. | |
2141 | * | |
2142 | * There are several events associated with a PUT: completion of the send on | |
2143 | * the initiator node (LNET_EVENT_SEND), and when the send completes | |
2144 | * successfully, the receipt of an acknowledgment (LNET_EVENT_ACK) indicating | |
2145 | * that the operation was accepted by the target. The event LNET_EVENT_PUT is | |
2146 | * used at the target node to indicate the completion of incoming data | |
2147 | * delivery. | |
2148 | * | |
2149 | * The local events will be logged in the EQ associated with the MD pointed to | |
2150 | * by \a mdh handle. Using a MD without an associated EQ results in these | |
2151 | * events being discarded. In this case, the caller must have another | |
2152 | * mechanism (e.g., a higher level protocol) for determining when it is safe | |
2153 | * to modify the memory region associated with the MD. | |
2154 | * | |
2155 | * Note that LNet does not guarantee the order of LNET_EVENT_SEND and | |
2156 | * LNET_EVENT_ACK, though intuitively ACK should happen after SEND. | |
2157 | * | |
2158 | * \param self Indicates the NID of a local interface through which to send | |
2159 | * the PUT request. Use LNET_NID_ANY to let LNet choose one by itself. | |
2160 | * \param mdh A handle for the MD that describes the memory to be sent. The MD | |
2161 | * must be "free floating" (See LNetMDBind()). | |
2162 | * \param ack Controls whether an acknowledgment is requested. | |
2163 | * Acknowledgments are only sent when they are requested by the initiating | |
2164 | * process and the target MD enables them. | |
2165 | * \param target A process identifier for the target process. | |
2166 | * \param portal The index in the \a target's portal table. | |
2167 | * \param match_bits The match bits to use for MD selection at the target | |
2168 | * process. | |
2169 | * \param offset The offset into the target MD (only used when the target | |
2170 | * MD has the LNET_MD_MANAGE_REMOTE option set). | |
2171 | * \param hdr_data 64 bits of user data that can be included in the message | |
2172 | * header. This data is written to an event queue entry at the target if an | |
2173 | * EQ is present on the matching MD. | |
2174 | * | |
2175 | * \retval 0 Success, and only in this case events will be generated | |
2176 | * and logged to EQ (if it exists). | |
2177 | * \retval -EIO Simulated failure. | |
2178 | * \retval -ENOMEM Memory allocation failure. | |
2179 | * \retval -ENOENT Invalid MD object. | |
2180 | * | |
2181 | * \see lnet_event_t::hdr_data and lnet_event_kind_t. | |
2182 | */ | |
2183 | int | |
2184 | LNetPut(lnet_nid_t self, lnet_handle_md_t mdh, lnet_ack_req_t ack, | |
2185 | lnet_process_id_t target, unsigned int portal, | |
2186 | __u64 match_bits, unsigned int offset, | |
2187 | __u64 hdr_data) | |
2188 | { | |
7e7ab095 MS |
2189 | struct lnet_msg *msg; |
2190 | struct lnet_libmd *md; | |
2191 | int cpt; | |
2192 | int rc; | |
d7e09d03 | 2193 | |
af66a6e2 | 2194 | LASSERT(the_lnet.ln_refcount > 0); |
d7e09d03 | 2195 | |
af66a6e2 | 2196 | if (!list_empty(&the_lnet.ln_test_peers) && /* normally we don't */ |
9b79ca85 | 2197 | fail_peer(target.nid, 1)) { /* shall we now? */ |
d7e09d03 PT |
2198 | CERROR("Dropping PUT to %s: simulated failure\n", |
2199 | libcfs_id2str(target)); | |
2200 | return -EIO; | |
2201 | } | |
2202 | ||
2203 | msg = lnet_msg_alloc(); | |
06ace26e | 2204 | if (!msg) { |
d7e09d03 PT |
2205 | CERROR("Dropping PUT to %s: ENOMEM on lnet_msg_t\n", |
2206 | libcfs_id2str(target)); | |
2207 | return -ENOMEM; | |
2208 | } | |
2209 | msg->msg_vmflush = !!memory_pressure_get(); | |
2210 | ||
2211 | cpt = lnet_cpt_of_cookie(mdh.cookie); | |
2212 | lnet_res_lock(cpt); | |
2213 | ||
2214 | md = lnet_handle2md(&mdh); | |
5fd88337 | 2215 | if (!md || !md->md_threshold || md->md_me) { |
b0f5aad5 | 2216 | CERROR("Dropping PUT (%llu:%d:%s): MD (%d) invalid\n", |
d7e09d03 | 2217 | match_bits, portal, libcfs_id2str(target), |
06ace26e JS |
2218 | !md ? -1 : md->md_threshold); |
2219 | if (md && md->md_me) | |
d7e09d03 PT |
2220 | CERROR("Source MD also attached to portal %d\n", |
2221 | md->md_me->me_portal); | |
2222 | lnet_res_unlock(cpt); | |
2223 | ||
2224 | lnet_msg_free(msg); | |
2225 | return -ENOENT; | |
2226 | } | |
2227 | ||
2228 | CDEBUG(D_NET, "LNetPut -> %s\n", libcfs_id2str(target)); | |
2229 | ||
2230 | lnet_msg_attach_md(msg, md, 0, 0); | |
2231 | ||
2232 | lnet_prep_send(msg, LNET_MSG_PUT, target, 0, md->md_length); | |
2233 | ||
2234 | msg->msg_hdr.msg.put.match_bits = cpu_to_le64(match_bits); | |
2235 | msg->msg_hdr.msg.put.ptl_index = cpu_to_le32(portal); | |
2236 | msg->msg_hdr.msg.put.offset = cpu_to_le32(offset); | |
2237 | msg->msg_hdr.msg.put.hdr_data = hdr_data; | |
2238 | ||
2239 | /* NB handles only looked up by creator (no flips) */ | |
2240 | if (ack == LNET_ACK_REQ) { | |
2241 | msg->msg_hdr.msg.put.ack_wmd.wh_interface_cookie = | |
2242 | the_lnet.ln_interface_cookie; | |
2243 | msg->msg_hdr.msg.put.ack_wmd.wh_object_cookie = | |
2244 | md->md_lh.lh_cookie; | |
2245 | } else { | |
2246 | msg->msg_hdr.msg.put.ack_wmd.wh_interface_cookie = | |
2247 | LNET_WIRE_HANDLE_COOKIE_NONE; | |
2248 | msg->msg_hdr.msg.put.ack_wmd.wh_object_cookie = | |
2249 | LNET_WIRE_HANDLE_COOKIE_NONE; | |
2250 | } | |
2251 | ||
2252 | lnet_res_unlock(cpt); | |
2253 | ||
2254 | lnet_build_msg_event(msg, LNET_EVENT_SEND); | |
2255 | ||
2256 | rc = lnet_send(self, msg, LNET_NID_ANY); | |
5fd88337 | 2257 | if (rc) { |
af66a6e2 | 2258 | CNETERR("Error sending PUT to %s: %d\n", |
c314c319 | 2259 | libcfs_id2str(target), rc); |
af66a6e2 | 2260 | lnet_finalize(NULL, msg, rc); |
d7e09d03 PT |
2261 | } |
2262 | ||
2263 | /* completion will be signalled by an event */ | |
2264 | return 0; | |
2265 | } | |
2266 | EXPORT_SYMBOL(LNetPut); | |
2267 | ||
2268 | lnet_msg_t * | |
af66a6e2 | 2269 | lnet_create_reply_msg(lnet_ni_t *ni, lnet_msg_t *getmsg) |
d7e09d03 | 2270 | { |
4420cfd3 JS |
2271 | /* |
2272 | * The LND can DMA direct to the GET md (i.e. no REPLY msg). This | |
d7e09d03 PT |
2273 | * returns a msg for the LND to pass to lnet_finalize() when the sink |
2274 | * data has been received. | |
2275 | * | |
2276 | * CAVEAT EMPTOR: 'getmsg' is the original GET, which is freed when | |
4420cfd3 JS |
2277 | * lnet_finalize() is called on it, so the LND must call this first |
2278 | */ | |
7e7ab095 MS |
2279 | struct lnet_msg *msg = lnet_msg_alloc(); |
2280 | struct lnet_libmd *getmd = getmsg->msg_md; | |
2281 | lnet_process_id_t peer_id = getmsg->msg_target; | |
2282 | int cpt; | |
d7e09d03 PT |
2283 | |
2284 | LASSERT(!getmsg->msg_target_is_router); | |
2285 | LASSERT(!getmsg->msg_routing); | |
2286 | ||
06ace26e | 2287 | if (!msg) { |
af66a6e2 | 2288 | CERROR("%s: Dropping REPLY from %s: can't allocate msg\n", |
c314c319 | 2289 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id)); |
d7e09d03 PT |
2290 | goto drop; |
2291 | } | |
2292 | ||
600e9b49 LZ |
2293 | cpt = lnet_cpt_of_cookie(getmd->md_lh.lh_cookie); |
2294 | lnet_res_lock(cpt); | |
2295 | ||
2296 | LASSERT(getmd->md_refcount > 0); | |
2297 | ||
5fd88337 | 2298 | if (!getmd->md_threshold) { |
af66a6e2 | 2299 | CERROR("%s: Dropping REPLY from %s for inactive MD %p\n", |
c314c319 JS |
2300 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id), |
2301 | getmd); | |
d7e09d03 PT |
2302 | lnet_res_unlock(cpt); |
2303 | goto drop; | |
2304 | } | |
2305 | ||
5fd88337 | 2306 | LASSERT(!getmd->md_offset); |
d7e09d03 PT |
2307 | |
2308 | CDEBUG(D_NET, "%s: Reply from %s md %p\n", | |
2309 | libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id), getmd); | |
2310 | ||
2311 | /* setup information for lnet_build_msg_event */ | |
2312 | msg->msg_from = peer_id.nid; | |
2313 | msg->msg_type = LNET_MSG_GET; /* flag this msg as an "optimized" GET */ | |
2314 | msg->msg_hdr.src_nid = peer_id.nid; | |
2315 | msg->msg_hdr.payload_length = getmd->md_length; | |
2316 | msg->msg_receiving = 1; /* required by lnet_msg_attach_md */ | |
2317 | ||
2318 | lnet_msg_attach_md(msg, getmd, getmd->md_offset, getmd->md_length); | |
2319 | lnet_res_unlock(cpt); | |
2320 | ||
2321 | cpt = lnet_cpt_of_nid(peer_id.nid); | |
2322 | ||
2323 | lnet_net_lock(cpt); | |
2324 | lnet_msg_commit(msg, cpt); | |
2325 | lnet_net_unlock(cpt); | |
2326 | ||
2327 | lnet_build_msg_event(msg, LNET_EVENT_REPLY); | |
2328 | ||
2329 | return msg; | |
2330 | ||
2331 | drop: | |
2332 | cpt = lnet_cpt_of_nid(peer_id.nid); | |
2333 | ||
2334 | lnet_net_lock(cpt); | |
2335 | the_lnet.ln_counters[cpt]->drop_count++; | |
2336 | the_lnet.ln_counters[cpt]->drop_length += getmd->md_length; | |
2337 | lnet_net_unlock(cpt); | |
2338 | ||
06ace26e | 2339 | if (msg) |
d7e09d03 PT |
2340 | lnet_msg_free(msg); |
2341 | ||
2342 | return NULL; | |
2343 | } | |
2344 | EXPORT_SYMBOL(lnet_create_reply_msg); | |
2345 | ||
2346 | void | |
2347 | lnet_set_reply_msg_len(lnet_ni_t *ni, lnet_msg_t *reply, unsigned int len) | |
2348 | { | |
4420cfd3 JS |
2349 | /* |
2350 | * Set the REPLY length, now the RDMA that elides the REPLY message has | |
2351 | * completed and I know it. | |
2352 | */ | |
06ace26e | 2353 | LASSERT(reply); |
af66a6e2 LN |
2354 | LASSERT(reply->msg_type == LNET_MSG_GET); |
2355 | LASSERT(reply->msg_ev.type == LNET_EVENT_REPLY); | |
d7e09d03 | 2356 | |
4420cfd3 JS |
2357 | /* |
2358 | * NB I trusted my peer to RDMA. If she tells me she's written beyond | |
2359 | * the end of my buffer, I might as well be dead. | |
2360 | */ | |
af66a6e2 | 2361 | LASSERT(len <= reply->msg_ev.mlength); |
d7e09d03 PT |
2362 | |
2363 | reply->msg_ev.mlength = len; | |
2364 | } | |
2365 | EXPORT_SYMBOL(lnet_set_reply_msg_len); | |
2366 | ||
2367 | /** | |
2368 | * Initiate an asynchronous GET operation. | |
2369 | * | |
2370 | * On the initiator node, an LNET_EVENT_SEND is logged when the GET request | |
2371 | * is sent, and an LNET_EVENT_REPLY is logged when the data returned from | |
2372 | * the target node in the REPLY has been written to local MD. | |
2373 | * | |
2374 | * On the target node, an LNET_EVENT_GET is logged when the GET request | |
2375 | * arrives and is accepted into a MD. | |
2376 | * | |
2377 | * \param self,target,portal,match_bits,offset See the discussion in LNetPut(). | |
2378 | * \param mdh A handle for the MD that describes the memory into which the | |
ae4003f0 LN |
2379 | * requested data will be received. The MD must be "free floating" |
2380 | * (See LNetMDBind()). | |
d7e09d03 PT |
2381 | * |
2382 | * \retval 0 Success, and only in this case events will be generated | |
2383 | * and logged to EQ (if it exists) of the MD. | |
2384 | * \retval -EIO Simulated failure. | |
2385 | * \retval -ENOMEM Memory allocation failure. | |
2386 | * \retval -ENOENT Invalid MD object. | |
2387 | */ | |
2388 | int | |
2389 | LNetGet(lnet_nid_t self, lnet_handle_md_t mdh, | |
2390 | lnet_process_id_t target, unsigned int portal, | |
2391 | __u64 match_bits, unsigned int offset) | |
2392 | { | |
7e7ab095 MS |
2393 | struct lnet_msg *msg; |
2394 | struct lnet_libmd *md; | |
2395 | int cpt; | |
2396 | int rc; | |
d7e09d03 | 2397 | |
af66a6e2 | 2398 | LASSERT(the_lnet.ln_refcount > 0); |
d7e09d03 | 2399 | |
af66a6e2 | 2400 | if (!list_empty(&the_lnet.ln_test_peers) && /* normally we don't */ |
9b79ca85 | 2401 | fail_peer(target.nid, 1)) { /* shall we now? */ |
d7e09d03 PT |
2402 | CERROR("Dropping GET to %s: simulated failure\n", |
2403 | libcfs_id2str(target)); | |
2404 | return -EIO; | |
2405 | } | |
2406 | ||
2407 | msg = lnet_msg_alloc(); | |
06ace26e | 2408 | if (!msg) { |
d7e09d03 PT |
2409 | CERROR("Dropping GET to %s: ENOMEM on lnet_msg_t\n", |
2410 | libcfs_id2str(target)); | |
2411 | return -ENOMEM; | |
2412 | } | |
2413 | ||
2414 | cpt = lnet_cpt_of_cookie(mdh.cookie); | |
2415 | lnet_res_lock(cpt); | |
2416 | ||
2417 | md = lnet_handle2md(&mdh); | |
5fd88337 | 2418 | if (!md || !md->md_threshold || md->md_me) { |
b0f5aad5 | 2419 | CERROR("Dropping GET (%llu:%d:%s): MD (%d) invalid\n", |
d7e09d03 | 2420 | match_bits, portal, libcfs_id2str(target), |
06ace26e JS |
2421 | !md ? -1 : md->md_threshold); |
2422 | if (md && md->md_me) | |
d7e09d03 PT |
2423 | CERROR("REPLY MD also attached to portal %d\n", |
2424 | md->md_me->me_portal); | |
2425 | ||
2426 | lnet_res_unlock(cpt); | |
2427 | ||
2428 | lnet_msg_free(msg); | |
d7e09d03 PT |
2429 | return -ENOENT; |
2430 | } | |
2431 | ||
2432 | CDEBUG(D_NET, "LNetGet -> %s\n", libcfs_id2str(target)); | |
2433 | ||
2434 | lnet_msg_attach_md(msg, md, 0, 0); | |
2435 | ||
2436 | lnet_prep_send(msg, LNET_MSG_GET, target, 0, 0); | |
2437 | ||
2438 | msg->msg_hdr.msg.get.match_bits = cpu_to_le64(match_bits); | |
2439 | msg->msg_hdr.msg.get.ptl_index = cpu_to_le32(portal); | |
2440 | msg->msg_hdr.msg.get.src_offset = cpu_to_le32(offset); | |
2441 | msg->msg_hdr.msg.get.sink_length = cpu_to_le32(md->md_length); | |
2442 | ||
2443 | /* NB handles only looked up by creator (no flips) */ | |
2444 | msg->msg_hdr.msg.get.return_wmd.wh_interface_cookie = | |
2445 | the_lnet.ln_interface_cookie; | |
2446 | msg->msg_hdr.msg.get.return_wmd.wh_object_cookie = | |
2447 | md->md_lh.lh_cookie; | |
2448 | ||
2449 | lnet_res_unlock(cpt); | |
2450 | ||
2451 | lnet_build_msg_event(msg, LNET_EVENT_SEND); | |
2452 | ||
2453 | rc = lnet_send(self, msg, LNET_NID_ANY); | |
2454 | if (rc < 0) { | |
af66a6e2 | 2455 | CNETERR("Error sending GET to %s: %d\n", |
c314c319 | 2456 | libcfs_id2str(target), rc); |
af66a6e2 | 2457 | lnet_finalize(NULL, msg, rc); |
d7e09d03 PT |
2458 | } |
2459 | ||
2460 | /* completion will be signalled by an event */ | |
2461 | return 0; | |
2462 | } | |
2463 | EXPORT_SYMBOL(LNetGet); | |
2464 | ||
2465 | /** | |
2466 | * Calculate distance to node at \a dstnid. | |
2467 | * | |
2468 | * \param dstnid Target NID. | |
2469 | * \param srcnidp If not NULL, NID of the local interface to reach \a dstnid | |
2470 | * is saved here. | |
2471 | * \param orderp If not NULL, order of the route to reach \a dstnid is saved | |
2472 | * here. | |
2473 | * | |
2474 | * \retval 0 If \a dstnid belongs to a local interface, and reserved option | |
2475 | * local_nid_dist_zero is set, which is the default. | |
2476 | * \retval positives Distance to target NID, i.e. number of hops plus one. | |
2477 | * \retval -EHOSTUNREACH If \a dstnid is not reachable. | |
2478 | */ | |
2479 | int | |
2480 | LNetDist(lnet_nid_t dstnid, lnet_nid_t *srcnidp, __u32 *orderp) | |
2481 | { | |
7e7ab095 MS |
2482 | struct list_head *e; |
2483 | struct lnet_ni *ni; | |
2484 | lnet_remotenet_t *rnet; | |
2485 | __u32 dstnet = LNET_NIDNET(dstnid); | |
2486 | int hops; | |
2487 | int cpt; | |
2488 | __u32 order = 2; | |
2489 | struct list_head *rn_list; | |
d7e09d03 | 2490 | |
4420cfd3 JS |
2491 | /* |
2492 | * if !local_nid_dist_zero, I don't return a distance of 0 ever | |
d7e09d03 PT |
2493 | * (when lustre sees a distance of 0, it substitutes 0@lo), so I |
2494 | * keep order 0 free for 0@lo and order 1 free for a local NID | |
4420cfd3 JS |
2495 | * match |
2496 | */ | |
af66a6e2 | 2497 | LASSERT(the_lnet.ln_refcount > 0); |
d7e09d03 PT |
2498 | |
2499 | cpt = lnet_net_lock_current(); | |
2500 | ||
af66a6e2 | 2501 | list_for_each(e, &the_lnet.ln_nis) { |
d7e09d03 PT |
2502 | ni = list_entry(e, lnet_ni_t, ni_list); |
2503 | ||
2504 | if (ni->ni_nid == dstnid) { | |
06ace26e | 2505 | if (srcnidp) |
d7e09d03 | 2506 | *srcnidp = dstnid; |
06ace26e | 2507 | if (orderp) { |
d7e09d03 PT |
2508 | if (LNET_NETTYP(LNET_NIDNET(dstnid)) == LOLND) |
2509 | *orderp = 0; | |
2510 | else | |
2511 | *orderp = 1; | |
2512 | } | |
2513 | lnet_net_unlock(cpt); | |
2514 | ||
2515 | return local_nid_dist_zero ? 0 : 1; | |
2516 | } | |
2517 | ||
2518 | if (LNET_NIDNET(ni->ni_nid) == dstnet) { | |
06ace26e | 2519 | if (srcnidp) |
d7e09d03 | 2520 | *srcnidp = ni->ni_nid; |
06ace26e | 2521 | if (orderp) |
d7e09d03 PT |
2522 | *orderp = order; |
2523 | lnet_net_unlock(cpt); | |
2524 | return 1; | |
2525 | } | |
2526 | ||
2527 | order++; | |
2528 | } | |
2529 | ||
2530 | rn_list = lnet_net2rnethash(dstnet); | |
2531 | list_for_each(e, rn_list) { | |
2532 | rnet = list_entry(e, lnet_remotenet_t, lrn_list); | |
2533 | ||
2534 | if (rnet->lrn_net == dstnet) { | |
2535 | lnet_route_t *route; | |
2536 | lnet_route_t *shortest = NULL; | |
b9bbb61c AS |
2537 | __u32 shortest_hops = LNET_UNDEFINED_HOPS; |
2538 | __u32 route_hops; | |
d7e09d03 | 2539 | |
af66a6e2 | 2540 | LASSERT(!list_empty(&rnet->lrn_routes)); |
d7e09d03 PT |
2541 | |
2542 | list_for_each_entry(route, &rnet->lrn_routes, | |
c314c319 | 2543 | lr_list) { |
b9bbb61c AS |
2544 | route_hops = route->lr_hops; |
2545 | if (route_hops == LNET_UNDEFINED_HOPS) | |
2546 | route_hops = 1; | |
06ace26e | 2547 | if (!shortest || |
b9bbb61c | 2548 | route_hops < shortest_hops) { |
d7e09d03 | 2549 | shortest = route; |
b9bbb61c AS |
2550 | shortest_hops = route_hops; |
2551 | } | |
d7e09d03 PT |
2552 | } |
2553 | ||
06ace26e | 2554 | LASSERT(shortest); |
b9bbb61c | 2555 | hops = shortest_hops; |
06ace26e | 2556 | if (srcnidp) |
d7e09d03 | 2557 | *srcnidp = shortest->lr_gateway->lp_ni->ni_nid; |
06ace26e | 2558 | if (orderp) |
d7e09d03 PT |
2559 | *orderp = order; |
2560 | lnet_net_unlock(cpt); | |
2561 | return hops + 1; | |
2562 | } | |
2563 | order++; | |
2564 | } | |
2565 | ||
2566 | lnet_net_unlock(cpt); | |
2567 | return -EHOSTUNREACH; | |
2568 | } | |
2569 | EXPORT_SYMBOL(LNetDist); |