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staging: lustre: Update module author to OpenSFS
[deliverable/linux.git] / drivers / staging / lustre / lustre / lmv / lmv_obd.c
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) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #define DEBUG_SUBSYSTEM S_LMV
38 #include <linux/slab.h>
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/pagemap.h>
42 #include <linux/mm.h>
43 #include <asm/div64.h>
44 #include <linux/seq_file.h>
45 #include <linux/namei.h>
46 #include <linux/uaccess.h>
47
48 #include "../include/lustre/lustre_idl.h"
49 #include "../include/obd_support.h"
50 #include "../include/lustre_lib.h"
51 #include "../include/lustre_net.h"
52 #include "../include/obd_class.h"
53 #include "../include/lprocfs_status.h"
54 #include "../include/lustre_lite.h"
55 #include "../include/lustre_fid.h"
56 #include "lmv_internal.h"
57
58 static void lmv_activate_target(struct lmv_obd *lmv,
59 struct lmv_tgt_desc *tgt,
60 int activate)
61 {
62 if (tgt->ltd_active == activate)
63 return;
64
65 tgt->ltd_active = activate;
66 lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
67 }
68
69 /**
70 * Error codes:
71 *
72 * -EINVAL : UUID can't be found in the LMV's target list
73 * -ENOTCONN: The UUID is found, but the target connection is bad (!)
74 * -EBADF : The UUID is found, but the OBD of the wrong type (!)
75 */
76 static int lmv_set_mdc_active(struct lmv_obd *lmv, struct obd_uuid *uuid,
77 int activate)
78 {
79 struct lmv_tgt_desc *uninitialized_var(tgt);
80 struct obd_device *obd;
81 int i;
82 int rc = 0;
83
84 CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
85 lmv, uuid->uuid, activate);
86
87 spin_lock(&lmv->lmv_lock);
88 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
89 tgt = lmv->tgts[i];
90 if (tgt == NULL || tgt->ltd_exp == NULL)
91 continue;
92
93 CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n", i,
94 tgt->ltd_uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
95
96 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
97 break;
98 }
99
100 if (i == lmv->desc.ld_tgt_count) {
101 rc = -EINVAL;
102 goto out_lmv_lock;
103 }
104
105 obd = class_exp2obd(tgt->ltd_exp);
106 if (obd == NULL) {
107 rc = -ENOTCONN;
108 goto out_lmv_lock;
109 }
110
111 CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
112 obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
113 obd->obd_type->typ_name, i);
114 LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
115
116 if (tgt->ltd_active == activate) {
117 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
118 activate ? "" : "in");
119 goto out_lmv_lock;
120 }
121
122 CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
123 activate ? "" : "in");
124 lmv_activate_target(lmv, tgt, activate);
125
126 out_lmv_lock:
127 spin_unlock(&lmv->lmv_lock);
128 return rc;
129 }
130
131 static struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
132 {
133 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
134
135 return obd_get_uuid(lmv->tgts[0]->ltd_exp);
136 }
137
138 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
139 enum obd_notify_event ev, void *data)
140 {
141 struct obd_connect_data *conn_data;
142 struct lmv_obd *lmv = &obd->u.lmv;
143 struct obd_uuid *uuid;
144 int rc = 0;
145
146 if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
147 CERROR("unexpected notification of %s %s!\n",
148 watched->obd_type->typ_name,
149 watched->obd_name);
150 return -EINVAL;
151 }
152
153 uuid = &watched->u.cli.cl_target_uuid;
154 if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
155 /*
156 * Set MDC as active before notifying the observer, so the
157 * observer can use the MDC normally.
158 */
159 rc = lmv_set_mdc_active(lmv, uuid,
160 ev == OBD_NOTIFY_ACTIVE);
161 if (rc) {
162 CERROR("%sactivation of %s failed: %d\n",
163 ev == OBD_NOTIFY_ACTIVE ? "" : "de",
164 uuid->uuid, rc);
165 return rc;
166 }
167 } else if (ev == OBD_NOTIFY_OCD) {
168 conn_data = &watched->u.cli.cl_import->imp_connect_data;
169 /*
170 * XXX: Make sure that ocd_connect_flags from all targets are
171 * the same. Otherwise one of MDTs runs wrong version or
172 * something like this. --umka
173 */
174 obd->obd_self_export->exp_connect_data = *conn_data;
175 }
176 #if 0
177 else if (ev == OBD_NOTIFY_DISCON) {
178 /*
179 * For disconnect event, flush fld cache for failout MDS case.
180 */
181 fld_client_flush(&lmv->lmv_fld);
182 }
183 #endif
184 /*
185 * Pass the notification up the chain.
186 */
187 if (obd->obd_observer)
188 rc = obd_notify(obd->obd_observer, watched, ev, data);
189
190 return rc;
191 }
192
193 /**
194 * This is fake connect function. Its purpose is to initialize lmv and say
195 * caller that everything is okay. Real connection will be performed later.
196 */
197 static int lmv_connect(const struct lu_env *env,
198 struct obd_export **exp, struct obd_device *obd,
199 struct obd_uuid *cluuid, struct obd_connect_data *data,
200 void *localdata)
201 {
202 struct lmv_obd *lmv = &obd->u.lmv;
203 struct lustre_handle conn = { 0 };
204 int rc = 0;
205
206 /*
207 * We don't want to actually do the underlying connections more than
208 * once, so keep track.
209 */
210 lmv->refcount++;
211 if (lmv->refcount > 1) {
212 *exp = NULL;
213 return 0;
214 }
215
216 rc = class_connect(&conn, obd, cluuid);
217 if (rc) {
218 CERROR("class_connection() returned %d\n", rc);
219 return rc;
220 }
221
222 *exp = class_conn2export(&conn);
223 class_export_get(*exp);
224
225 lmv->exp = *exp;
226 lmv->connected = 0;
227 lmv->cluuid = *cluuid;
228
229 if (data)
230 lmv->conn_data = *data;
231
232 lmv->lmv_tgts_kobj = kobject_create_and_add("target_obds",
233 &obd->obd_kobj);
234 /*
235 * All real clients should perform actual connection right away, because
236 * it is possible, that LMV will not have opportunity to connect targets
237 * and MDC stuff will be called directly, for instance while reading
238 * ../mdc/../kbytesfree procfs file, etc.
239 */
240 if (data->ocd_connect_flags & OBD_CONNECT_REAL)
241 rc = lmv_check_connect(obd);
242
243 if (rc && lmv->lmv_tgts_kobj)
244 kobject_put(lmv->lmv_tgts_kobj);
245
246 return rc;
247 }
248
249 static void lmv_set_timeouts(struct obd_device *obd)
250 {
251 struct lmv_tgt_desc *tgt;
252 struct lmv_obd *lmv;
253 int i;
254
255 lmv = &obd->u.lmv;
256 if (lmv->server_timeout == 0)
257 return;
258
259 if (lmv->connected == 0)
260 return;
261
262 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
263 tgt = lmv->tgts[i];
264 if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
265 continue;
266
267 obd_set_info_async(NULL, tgt->ltd_exp, sizeof(KEY_INTERMDS),
268 KEY_INTERMDS, 0, NULL, NULL);
269 }
270 }
271
272 static int lmv_init_ea_size(struct obd_export *exp, int easize,
273 int def_easize, int cookiesize, int def_cookiesize)
274 {
275 struct obd_device *obd = exp->exp_obd;
276 struct lmv_obd *lmv = &obd->u.lmv;
277 int i;
278 int rc = 0;
279 int change = 0;
280
281 if (lmv->max_easize < easize) {
282 lmv->max_easize = easize;
283 change = 1;
284 }
285 if (lmv->max_def_easize < def_easize) {
286 lmv->max_def_easize = def_easize;
287 change = 1;
288 }
289 if (lmv->max_cookiesize < cookiesize) {
290 lmv->max_cookiesize = cookiesize;
291 change = 1;
292 }
293 if (lmv->max_def_cookiesize < def_cookiesize) {
294 lmv->max_def_cookiesize = def_cookiesize;
295 change = 1;
296 }
297 if (change == 0)
298 return 0;
299
300 if (lmv->connected == 0)
301 return 0;
302
303 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
304 if (lmv->tgts[i] == NULL ||
305 lmv->tgts[i]->ltd_exp == NULL ||
306 lmv->tgts[i]->ltd_active == 0) {
307 CWARN("%s: NULL export for %d\n", obd->obd_name, i);
308 continue;
309 }
310
311 rc = md_init_ea_size(lmv->tgts[i]->ltd_exp, easize, def_easize,
312 cookiesize, def_cookiesize);
313 if (rc) {
314 CERROR("%s: obd_init_ea_size() failed on MDT target %d: rc = %d.\n",
315 obd->obd_name, i, rc);
316 break;
317 }
318 }
319 return rc;
320 }
321
322 #define MAX_STRING_SIZE 128
323
324 static int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
325 {
326 struct lmv_obd *lmv = &obd->u.lmv;
327 struct obd_uuid *cluuid = &lmv->cluuid;
328 struct obd_uuid lmv_mdc_uuid = { "LMV_MDC_UUID" };
329 struct obd_device *mdc_obd;
330 struct obd_export *mdc_exp;
331 struct lu_fld_target target;
332 int rc;
333
334 mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
335 &obd->obd_uuid);
336 if (!mdc_obd) {
337 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
338 return -EINVAL;
339 }
340
341 CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s FOR %s\n",
342 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
343 tgt->ltd_uuid.uuid, obd->obd_uuid.uuid,
344 cluuid->uuid);
345
346 if (!mdc_obd->obd_set_up) {
347 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
348 return -EINVAL;
349 }
350
351 rc = obd_connect(NULL, &mdc_exp, mdc_obd, &lmv_mdc_uuid,
352 &lmv->conn_data, NULL);
353 if (rc) {
354 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
355 return rc;
356 }
357
358 /*
359 * Init fid sequence client for this mdc and add new fld target.
360 */
361 rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
362 if (rc)
363 return rc;
364
365 target.ft_srv = NULL;
366 target.ft_exp = mdc_exp;
367 target.ft_idx = tgt->ltd_idx;
368
369 fld_client_add_target(&lmv->lmv_fld, &target);
370
371 rc = obd_register_observer(mdc_obd, obd);
372 if (rc) {
373 obd_disconnect(mdc_exp);
374 CERROR("target %s register_observer error %d\n",
375 tgt->ltd_uuid.uuid, rc);
376 return rc;
377 }
378
379 if (obd->obd_observer) {
380 /*
381 * Tell the observer about the new target.
382 */
383 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
384 OBD_NOTIFY_ACTIVE,
385 (void *)(tgt - lmv->tgts[0]));
386 if (rc) {
387 obd_disconnect(mdc_exp);
388 return rc;
389 }
390 }
391
392 tgt->ltd_active = 1;
393 tgt->ltd_exp = mdc_exp;
394 lmv->desc.ld_active_tgt_count++;
395
396 md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize,
397 lmv->max_cookiesize, lmv->max_def_cookiesize);
398
399 CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
400 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
401 atomic_read(&obd->obd_refcount));
402
403 if (lmv->lmv_tgts_kobj)
404 /* Even if we failed to create the link, that's fine */
405 rc = sysfs_create_link(lmv->lmv_tgts_kobj, &mdc_obd->obd_kobj,
406 mdc_obd->obd_name);
407 return 0;
408 }
409
410 static void lmv_del_target(struct lmv_obd *lmv, int index)
411 {
412 if (lmv->tgts[index] == NULL)
413 return;
414
415 kfree(lmv->tgts[index]);
416 lmv->tgts[index] = NULL;
417 return;
418 }
419
420 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
421 __u32 index, int gen)
422 {
423 struct lmv_obd *lmv = &obd->u.lmv;
424 struct lmv_tgt_desc *tgt;
425 int rc = 0;
426
427 CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
428
429 lmv_init_lock(lmv);
430
431 if (lmv->desc.ld_tgt_count == 0) {
432 struct obd_device *mdc_obd;
433
434 mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
435 &obd->obd_uuid);
436 if (!mdc_obd) {
437 lmv_init_unlock(lmv);
438 CERROR("%s: Target %s not attached: rc = %d\n",
439 obd->obd_name, uuidp->uuid, -EINVAL);
440 return -EINVAL;
441 }
442 }
443
444 if ((index < lmv->tgts_size) && (lmv->tgts[index] != NULL)) {
445 tgt = lmv->tgts[index];
446 CERROR("%s: UUID %s already assigned at LOV target index %d: rc = %d\n",
447 obd->obd_name,
448 obd_uuid2str(&tgt->ltd_uuid), index, -EEXIST);
449 lmv_init_unlock(lmv);
450 return -EEXIST;
451 }
452
453 if (index >= lmv->tgts_size) {
454 /* We need to reallocate the lmv target array. */
455 struct lmv_tgt_desc **newtgts, **old = NULL;
456 __u32 newsize = 1;
457 __u32 oldsize = 0;
458
459 while (newsize < index + 1)
460 newsize <<= 1;
461 newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
462 if (newtgts == NULL) {
463 lmv_init_unlock(lmv);
464 return -ENOMEM;
465 }
466
467 if (lmv->tgts_size) {
468 memcpy(newtgts, lmv->tgts,
469 sizeof(*newtgts) * lmv->tgts_size);
470 old = lmv->tgts;
471 oldsize = lmv->tgts_size;
472 }
473
474 lmv->tgts = newtgts;
475 lmv->tgts_size = newsize;
476 smp_rmb();
477 kfree(old);
478
479 CDEBUG(D_CONFIG, "tgts: %p size: %d\n", lmv->tgts,
480 lmv->tgts_size);
481 }
482
483 tgt = kzalloc(sizeof(*tgt), GFP_NOFS);
484 if (!tgt) {
485 lmv_init_unlock(lmv);
486 return -ENOMEM;
487 }
488
489 mutex_init(&tgt->ltd_fid_mutex);
490 tgt->ltd_idx = index;
491 tgt->ltd_uuid = *uuidp;
492 tgt->ltd_active = 0;
493 lmv->tgts[index] = tgt;
494 if (index >= lmv->desc.ld_tgt_count)
495 lmv->desc.ld_tgt_count = index + 1;
496
497 if (lmv->connected) {
498 rc = lmv_connect_mdc(obd, tgt);
499 if (rc) {
500 spin_lock(&lmv->lmv_lock);
501 lmv->desc.ld_tgt_count--;
502 memset(tgt, 0, sizeof(*tgt));
503 spin_unlock(&lmv->lmv_lock);
504 } else {
505 int easize = sizeof(struct lmv_stripe_md) +
506 lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
507 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0, 0);
508 }
509 }
510
511 lmv_init_unlock(lmv);
512 return rc;
513 }
514
515 int lmv_check_connect(struct obd_device *obd)
516 {
517 struct lmv_obd *lmv = &obd->u.lmv;
518 struct lmv_tgt_desc *tgt;
519 int i;
520 int rc;
521 int easize;
522
523 if (lmv->connected)
524 return 0;
525
526 lmv_init_lock(lmv);
527 if (lmv->connected) {
528 lmv_init_unlock(lmv);
529 return 0;
530 }
531
532 if (lmv->desc.ld_tgt_count == 0) {
533 lmv_init_unlock(lmv);
534 CERROR("%s: no targets configured.\n", obd->obd_name);
535 return -EINVAL;
536 }
537
538 CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
539 lmv->cluuid.uuid, obd->obd_name);
540
541 LASSERT(lmv->tgts != NULL);
542
543 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
544 tgt = lmv->tgts[i];
545 if (tgt == NULL)
546 continue;
547 rc = lmv_connect_mdc(obd, tgt);
548 if (rc)
549 goto out_disc;
550 }
551
552 lmv_set_timeouts(obd);
553 class_export_put(lmv->exp);
554 lmv->connected = 1;
555 easize = lmv_get_easize(lmv);
556 lmv_init_ea_size(obd->obd_self_export, easize, 0, 0, 0);
557 lmv_init_unlock(lmv);
558 return 0;
559
560 out_disc:
561 while (i-- > 0) {
562 int rc2;
563
564 tgt = lmv->tgts[i];
565 if (tgt == NULL)
566 continue;
567 tgt->ltd_active = 0;
568 if (tgt->ltd_exp) {
569 --lmv->desc.ld_active_tgt_count;
570 rc2 = obd_disconnect(tgt->ltd_exp);
571 if (rc2) {
572 CERROR("LMV target %s disconnect on MDC idx %d: error %d\n",
573 tgt->ltd_uuid.uuid, i, rc2);
574 }
575 }
576 }
577 class_disconnect(lmv->exp);
578 lmv_init_unlock(lmv);
579 return rc;
580 }
581
582 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
583 {
584 struct lmv_obd *lmv = &obd->u.lmv;
585 struct obd_device *mdc_obd;
586 int rc;
587
588 LASSERT(tgt != NULL);
589 LASSERT(obd != NULL);
590
591 mdc_obd = class_exp2obd(tgt->ltd_exp);
592
593 if (mdc_obd) {
594 mdc_obd->obd_force = obd->obd_force;
595 mdc_obd->obd_fail = obd->obd_fail;
596 mdc_obd->obd_no_recov = obd->obd_no_recov;
597
598 if (lmv->lmv_tgts_kobj)
599 sysfs_remove_link(lmv->lmv_tgts_kobj,
600 mdc_obd->obd_name);
601 }
602
603 rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
604 if (rc)
605 CERROR("Can't finalize fids factory\n");
606
607 CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
608 tgt->ltd_exp->exp_obd->obd_name,
609 tgt->ltd_exp->exp_obd->obd_uuid.uuid);
610
611 obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
612 rc = obd_disconnect(tgt->ltd_exp);
613 if (rc) {
614 if (tgt->ltd_active) {
615 CERROR("Target %s disconnect error %d\n",
616 tgt->ltd_uuid.uuid, rc);
617 }
618 }
619
620 lmv_activate_target(lmv, tgt, 0);
621 tgt->ltd_exp = NULL;
622 return 0;
623 }
624
625 static int lmv_disconnect(struct obd_export *exp)
626 {
627 struct obd_device *obd = class_exp2obd(exp);
628 struct lmv_obd *lmv = &obd->u.lmv;
629 int rc;
630 int i;
631
632 if (!lmv->tgts)
633 goto out_local;
634
635 /*
636 * Only disconnect the underlying layers on the final disconnect.
637 */
638 lmv->refcount--;
639 if (lmv->refcount != 0)
640 goto out_local;
641
642 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
643 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
644 continue;
645
646 lmv_disconnect_mdc(obd, lmv->tgts[i]);
647 }
648
649 if (lmv->lmv_tgts_kobj)
650 kobject_put(lmv->lmv_tgts_kobj);
651
652 out_local:
653 /*
654 * This is the case when no real connection is established by
655 * lmv_check_connect().
656 */
657 if (!lmv->connected)
658 class_export_put(exp);
659 rc = class_disconnect(exp);
660 if (lmv->refcount == 0)
661 lmv->connected = 0;
662 return rc;
663 }
664
665 static int lmv_fid2path(struct obd_export *exp, int len, void *karg, void *uarg)
666 {
667 struct obd_device *obddev = class_exp2obd(exp);
668 struct lmv_obd *lmv = &obddev->u.lmv;
669 struct getinfo_fid2path *gf;
670 struct lmv_tgt_desc *tgt;
671 struct getinfo_fid2path *remote_gf = NULL;
672 int remote_gf_size = 0;
673 int rc;
674
675 gf = (struct getinfo_fid2path *)karg;
676 tgt = lmv_find_target(lmv, &gf->gf_fid);
677 if (IS_ERR(tgt))
678 return PTR_ERR(tgt);
679
680 repeat_fid2path:
681 rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
682 if (rc != 0 && rc != -EREMOTE)
683 goto out_fid2path;
684
685 /* If remote_gf != NULL, it means just building the
686 * path on the remote MDT, copy this path segment to gf */
687 if (remote_gf != NULL) {
688 struct getinfo_fid2path *ori_gf;
689 char *ptr;
690
691 ori_gf = (struct getinfo_fid2path *)karg;
692 if (strlen(ori_gf->gf_path) +
693 strlen(gf->gf_path) > ori_gf->gf_pathlen) {
694 rc = -EOVERFLOW;
695 goto out_fid2path;
696 }
697
698 ptr = ori_gf->gf_path;
699
700 memmove(ptr + strlen(gf->gf_path) + 1, ptr,
701 strlen(ori_gf->gf_path));
702
703 strncpy(ptr, gf->gf_path, strlen(gf->gf_path));
704 ptr += strlen(gf->gf_path);
705 *ptr = '/';
706 }
707
708 CDEBUG(D_INFO, "%s: get path %s "DFID" rec: %llu ln: %u\n",
709 tgt->ltd_exp->exp_obd->obd_name,
710 gf->gf_path, PFID(&gf->gf_fid), gf->gf_recno,
711 gf->gf_linkno);
712
713 if (rc == 0)
714 goto out_fid2path;
715
716 /* sigh, has to go to another MDT to do path building further */
717 if (remote_gf == NULL) {
718 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
719 remote_gf = kzalloc(remote_gf_size, GFP_NOFS);
720 if (!remote_gf) {
721 rc = -ENOMEM;
722 goto out_fid2path;
723 }
724 remote_gf->gf_pathlen = PATH_MAX;
725 }
726
727 if (!fid_is_sane(&gf->gf_fid)) {
728 CERROR("%s: invalid FID "DFID": rc = %d\n",
729 tgt->ltd_exp->exp_obd->obd_name,
730 PFID(&gf->gf_fid), -EINVAL);
731 rc = -EINVAL;
732 goto out_fid2path;
733 }
734
735 tgt = lmv_find_target(lmv, &gf->gf_fid);
736 if (IS_ERR(tgt)) {
737 rc = -EINVAL;
738 goto out_fid2path;
739 }
740
741 remote_gf->gf_fid = gf->gf_fid;
742 remote_gf->gf_recno = -1;
743 remote_gf->gf_linkno = -1;
744 memset(remote_gf->gf_path, 0, remote_gf->gf_pathlen);
745 gf = remote_gf;
746 goto repeat_fid2path;
747
748 out_fid2path:
749 kfree(remote_gf);
750 return rc;
751 }
752
753 static int lmv_hsm_req_count(struct lmv_obd *lmv,
754 const struct hsm_user_request *hur,
755 const struct lmv_tgt_desc *tgt_mds)
756 {
757 int i, nr = 0;
758 struct lmv_tgt_desc *curr_tgt;
759
760 /* count how many requests must be sent to the given target */
761 for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
762 curr_tgt = lmv_find_target(lmv, &hur->hur_user_item[i].hui_fid);
763 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
764 nr++;
765 }
766 return nr;
767 }
768
769 static void lmv_hsm_req_build(struct lmv_obd *lmv,
770 struct hsm_user_request *hur_in,
771 const struct lmv_tgt_desc *tgt_mds,
772 struct hsm_user_request *hur_out)
773 {
774 int i, nr_out;
775 struct lmv_tgt_desc *curr_tgt;
776
777 /* build the hsm_user_request for the given target */
778 hur_out->hur_request = hur_in->hur_request;
779 nr_out = 0;
780 for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
781 curr_tgt = lmv_find_target(lmv,
782 &hur_in->hur_user_item[i].hui_fid);
783 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
784 hur_out->hur_user_item[nr_out] =
785 hur_in->hur_user_item[i];
786 nr_out++;
787 }
788 }
789 hur_out->hur_request.hr_itemcount = nr_out;
790 memcpy(hur_data(hur_out), hur_data(hur_in),
791 hur_in->hur_request.hr_data_len);
792 }
793
794 static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
795 struct lustre_kernelcomm *lk, void *uarg)
796 {
797 int i, rc = 0;
798
799 /* unregister request (call from llapi_hsm_copytool_fini) */
800 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
801 /* best effort: try to clean as much as possible
802 * (continue on error) */
803 obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len, lk, uarg);
804 }
805
806 /* Whatever the result, remove copytool from kuc groups.
807 * Unreached coordinators will get EPIPE on next requests
808 * and will unregister automatically.
809 */
810 rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
811 return rc;
812 }
813
814 static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
815 struct lustre_kernelcomm *lk, void *uarg)
816 {
817 struct file *filp;
818 int i, j, err;
819 int rc = 0;
820 bool any_set = false;
821
822 /* All or nothing: try to register to all MDS.
823 * In case of failure, unregister from previous MDS,
824 * except if it because of inactive target. */
825 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
826 err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp,
827 len, lk, uarg);
828 if (err) {
829 if (lmv->tgts[i]->ltd_active) {
830 /* permanent error */
831 CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
832 lmv->tgts[i]->ltd_uuid.uuid,
833 i, cmd, err);
834 rc = err;
835 lk->lk_flags |= LK_FLG_STOP;
836 /* unregister from previous MDS */
837 for (j = 0; j < i; j++)
838 obd_iocontrol(cmd,
839 lmv->tgts[j]->ltd_exp,
840 len, lk, uarg);
841 return rc;
842 }
843 /* else: transient error.
844 * kuc will register to the missing MDT
845 * when it is back */
846 } else {
847 any_set = true;
848 }
849 }
850
851 if (!any_set)
852 /* no registration done: return error */
853 return -ENOTCONN;
854
855 /* at least one registration done, with no failure */
856 filp = fget(lk->lk_wfd);
857 if (filp == NULL) {
858 return -EBADF;
859 }
860 rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, lk->lk_data);
861 if (rc != 0 && filp != NULL)
862 fput(filp);
863 return rc;
864 }
865
866 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
867 int len, void *karg, void *uarg)
868 {
869 struct obd_device *obddev = class_exp2obd(exp);
870 struct lmv_obd *lmv = &obddev->u.lmv;
871 int i = 0;
872 int rc = 0;
873 int set = 0;
874 int count = lmv->desc.ld_tgt_count;
875
876 if (count == 0)
877 return -ENOTTY;
878
879 switch (cmd) {
880 case IOC_OBD_STATFS: {
881 struct obd_ioctl_data *data = karg;
882 struct obd_device *mdc_obd;
883 struct obd_statfs stat_buf = {0};
884 __u32 index;
885
886 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
887 if (index >= count)
888 return -ENODEV;
889
890 if (lmv->tgts[index] == NULL ||
891 lmv->tgts[index]->ltd_active == 0)
892 return -ENODATA;
893
894 mdc_obd = class_exp2obd(lmv->tgts[index]->ltd_exp);
895 if (!mdc_obd)
896 return -EINVAL;
897
898 /* copy UUID */
899 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
900 min((int) data->ioc_plen2,
901 (int) sizeof(struct obd_uuid))))
902 return -EFAULT;
903
904 rc = obd_statfs(NULL, lmv->tgts[index]->ltd_exp, &stat_buf,
905 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
906 0);
907 if (rc)
908 return rc;
909 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
910 min((int) data->ioc_plen1,
911 (int) sizeof(stat_buf))))
912 return -EFAULT;
913 break;
914 }
915 case OBD_IOC_QUOTACTL: {
916 struct if_quotactl *qctl = karg;
917 struct lmv_tgt_desc *tgt = NULL;
918 struct obd_quotactl *oqctl;
919
920 if (qctl->qc_valid == QC_MDTIDX) {
921 if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
922 return -EINVAL;
923
924 tgt = lmv->tgts[qctl->qc_idx];
925 if (tgt == NULL || tgt->ltd_exp == NULL)
926 return -EINVAL;
927 } else if (qctl->qc_valid == QC_UUID) {
928 for (i = 0; i < count; i++) {
929 tgt = lmv->tgts[i];
930 if (tgt == NULL)
931 continue;
932 if (!obd_uuid_equals(&tgt->ltd_uuid,
933 &qctl->obd_uuid))
934 continue;
935
936 if (tgt->ltd_exp == NULL)
937 return -EINVAL;
938
939 break;
940 }
941 } else {
942 return -EINVAL;
943 }
944
945 if (i >= count)
946 return -EAGAIN;
947
948 LASSERT(tgt && tgt->ltd_exp);
949 oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
950 if (!oqctl)
951 return -ENOMEM;
952
953 QCTL_COPY(oqctl, qctl);
954 rc = obd_quotactl(tgt->ltd_exp, oqctl);
955 if (rc == 0) {
956 QCTL_COPY(qctl, oqctl);
957 qctl->qc_valid = QC_MDTIDX;
958 qctl->obd_uuid = tgt->ltd_uuid;
959 }
960 kfree(oqctl);
961 break;
962 }
963 case OBD_IOC_CHANGELOG_SEND:
964 case OBD_IOC_CHANGELOG_CLEAR: {
965 struct ioc_changelog *icc = karg;
966
967 if (icc->icc_mdtindex >= count)
968 return -ENODEV;
969
970 if (lmv->tgts[icc->icc_mdtindex] == NULL ||
971 lmv->tgts[icc->icc_mdtindex]->ltd_exp == NULL ||
972 lmv->tgts[icc->icc_mdtindex]->ltd_active == 0)
973 return -ENODEV;
974 rc = obd_iocontrol(cmd, lmv->tgts[icc->icc_mdtindex]->ltd_exp,
975 sizeof(*icc), icc, NULL);
976 break;
977 }
978 case LL_IOC_GET_CONNECT_FLAGS: {
979 if (lmv->tgts[0] == NULL)
980 return -ENODATA;
981 rc = obd_iocontrol(cmd, lmv->tgts[0]->ltd_exp, len, karg, uarg);
982 break;
983 }
984 case OBD_IOC_FID2PATH: {
985 rc = lmv_fid2path(exp, len, karg, uarg);
986 break;
987 }
988 case LL_IOC_HSM_STATE_GET:
989 case LL_IOC_HSM_STATE_SET:
990 case LL_IOC_HSM_ACTION: {
991 struct md_op_data *op_data = karg;
992 struct lmv_tgt_desc *tgt;
993
994 tgt = lmv_find_target(lmv, &op_data->op_fid1);
995 if (IS_ERR(tgt))
996 return PTR_ERR(tgt);
997
998 if (tgt->ltd_exp == NULL)
999 return -EINVAL;
1000
1001 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1002 break;
1003 }
1004 case LL_IOC_HSM_PROGRESS: {
1005 const struct hsm_progress_kernel *hpk = karg;
1006 struct lmv_tgt_desc *tgt;
1007
1008 tgt = lmv_find_target(lmv, &hpk->hpk_fid);
1009 if (IS_ERR(tgt))
1010 return PTR_ERR(tgt);
1011 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1012 break;
1013 }
1014 case LL_IOC_HSM_REQUEST: {
1015 struct hsm_user_request *hur = karg;
1016 struct lmv_tgt_desc *tgt;
1017 unsigned int reqcount = hur->hur_request.hr_itemcount;
1018
1019 if (reqcount == 0)
1020 return 0;
1021
1022 /* if the request is about a single fid
1023 * or if there is a single MDS, no need to split
1024 * the request. */
1025 if (reqcount == 1 || count == 1) {
1026 tgt = lmv_find_target(lmv,
1027 &hur->hur_user_item[0].hui_fid);
1028 if (IS_ERR(tgt))
1029 return PTR_ERR(tgt);
1030 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1031 } else {
1032 /* split fid list to their respective MDS */
1033 for (i = 0; i < count; i++) {
1034 unsigned int nr, reqlen;
1035 int rc1;
1036 struct hsm_user_request *req;
1037
1038 nr = lmv_hsm_req_count(lmv, hur, lmv->tgts[i]);
1039 if (nr == 0) /* nothing for this MDS */
1040 continue;
1041
1042 /* build a request with fids for this MDS */
1043 reqlen = offsetof(typeof(*hur),
1044 hur_user_item[nr])
1045 + hur->hur_request.hr_data_len;
1046 req = libcfs_kvzalloc(reqlen, GFP_NOFS);
1047 if (req == NULL)
1048 return -ENOMEM;
1049
1050 lmv_hsm_req_build(lmv, hur, lmv->tgts[i], req);
1051
1052 rc1 = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp,
1053 reqlen, req, uarg);
1054 if (rc1 != 0 && rc == 0)
1055 rc = rc1;
1056 kvfree(req);
1057 }
1058 }
1059 break;
1060 }
1061 case LL_IOC_LOV_SWAP_LAYOUTS: {
1062 struct md_op_data *op_data = karg;
1063 struct lmv_tgt_desc *tgt1, *tgt2;
1064
1065 tgt1 = lmv_find_target(lmv, &op_data->op_fid1);
1066 if (IS_ERR(tgt1))
1067 return PTR_ERR(tgt1);
1068
1069 tgt2 = lmv_find_target(lmv, &op_data->op_fid2);
1070 if (IS_ERR(tgt2))
1071 return PTR_ERR(tgt2);
1072
1073 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1074 return -EINVAL;
1075
1076 /* only files on same MDT can have their layouts swapped */
1077 if (tgt1->ltd_idx != tgt2->ltd_idx)
1078 return -EPERM;
1079
1080 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1081 break;
1082 }
1083 case LL_IOC_HSM_CT_START: {
1084 struct lustre_kernelcomm *lk = karg;
1085
1086 if (lk->lk_flags & LK_FLG_STOP)
1087 rc = lmv_hsm_ct_unregister(lmv, cmd, len, lk, uarg);
1088 else
1089 rc = lmv_hsm_ct_register(lmv, cmd, len, lk, uarg);
1090 break;
1091 }
1092 default:
1093 for (i = 0; i < count; i++) {
1094 struct obd_device *mdc_obd;
1095 int err;
1096
1097 if (lmv->tgts[i] == NULL ||
1098 lmv->tgts[i]->ltd_exp == NULL)
1099 continue;
1100 /* ll_umount_begin() sets force flag but for lmv, not
1101 * mdc. Let's pass it through */
1102 mdc_obd = class_exp2obd(lmv->tgts[i]->ltd_exp);
1103 mdc_obd->obd_force = obddev->obd_force;
1104 err = obd_iocontrol(cmd, lmv->tgts[i]->ltd_exp, len,
1105 karg, uarg);
1106 if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
1107 return err;
1108 } else if (err) {
1109 if (lmv->tgts[i]->ltd_active) {
1110 CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
1111 lmv->tgts[i]->ltd_uuid.uuid,
1112 i, cmd, err);
1113 if (!rc)
1114 rc = err;
1115 }
1116 } else
1117 set = 1;
1118 }
1119 if (!set && !rc)
1120 rc = -EIO;
1121 }
1122 return rc;
1123 }
1124
1125 #if 0
1126 static int lmv_all_chars_policy(int count, const char *name,
1127 int len)
1128 {
1129 unsigned int c = 0;
1130
1131 while (len > 0)
1132 c += name[--len];
1133 c = c % count;
1134 return c;
1135 }
1136
1137 static int lmv_nid_policy(struct lmv_obd *lmv)
1138 {
1139 struct obd_import *imp;
1140 __u32 id;
1141
1142 /*
1143 * XXX: To get nid we assume that underlying obd device is mdc.
1144 */
1145 imp = class_exp2cliimp(lmv->tgts[0].ltd_exp);
1146 id = imp->imp_connection->c_self ^ (imp->imp_connection->c_self >> 32);
1147 return id % lmv->desc.ld_tgt_count;
1148 }
1149
1150 static int lmv_choose_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1151 enum placement_policy placement)
1152 {
1153 switch (placement) {
1154 case PLACEMENT_CHAR_POLICY:
1155 return lmv_all_chars_policy(lmv->desc.ld_tgt_count,
1156 op_data->op_name,
1157 op_data->op_namelen);
1158 case PLACEMENT_NID_POLICY:
1159 return lmv_nid_policy(lmv);
1160
1161 default:
1162 break;
1163 }
1164
1165 CERROR("Unsupported placement policy %x\n", placement);
1166 return -EINVAL;
1167 }
1168 #endif
1169
1170 /**
1171 * This is _inode_ placement policy function (not name).
1172 */
1173 static int lmv_placement_policy(struct obd_device *obd,
1174 struct md_op_data *op_data, u32 *mds)
1175 {
1176 struct lmv_obd *lmv = &obd->u.lmv;
1177
1178 LASSERT(mds != NULL);
1179
1180 if (lmv->desc.ld_tgt_count == 1) {
1181 *mds = 0;
1182 return 0;
1183 }
1184
1185 /**
1186 * If stripe_offset is provided during setdirstripe
1187 * (setdirstripe -i xx), xx MDS will be chosen.
1188 */
1189 if (op_data->op_cli_flags & CLI_SET_MEA) {
1190 struct lmv_user_md *lum;
1191
1192 lum = (struct lmv_user_md *)op_data->op_data;
1193 if (lum->lum_type == LMV_STRIPE_TYPE &&
1194 lum->lum_stripe_offset != -1) {
1195 if (lum->lum_stripe_offset >= lmv->desc.ld_tgt_count) {
1196 CERROR("%s: Stripe_offset %d > MDT count %d: rc = %d\n",
1197 obd->obd_name,
1198 lum->lum_stripe_offset,
1199 lmv->desc.ld_tgt_count, -ERANGE);
1200 return -ERANGE;
1201 }
1202 *mds = lum->lum_stripe_offset;
1203 return 0;
1204 }
1205 }
1206
1207 /* Allocate new fid on target according to operation type and parent
1208 * home mds. */
1209 *mds = op_data->op_mds;
1210 return 0;
1211 }
1212
1213 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
1214 {
1215 struct lmv_tgt_desc *tgt;
1216 int rc;
1217
1218 tgt = lmv_get_target(lmv, mds);
1219 if (IS_ERR(tgt))
1220 return PTR_ERR(tgt);
1221
1222 /*
1223 * New seq alloc and FLD setup should be atomic. Otherwise we may find
1224 * on server that seq in new allocated fid is not yet known.
1225 */
1226 mutex_lock(&tgt->ltd_fid_mutex);
1227
1228 if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL) {
1229 rc = -ENODEV;
1230 goto out;
1231 }
1232
1233 /*
1234 * Asking underlaying tgt layer to allocate new fid.
1235 */
1236 rc = obd_fid_alloc(tgt->ltd_exp, fid, NULL);
1237 if (rc > 0) {
1238 LASSERT(fid_is_sane(fid));
1239 rc = 0;
1240 }
1241
1242 out:
1243 mutex_unlock(&tgt->ltd_fid_mutex);
1244 return rc;
1245 }
1246
1247 int lmv_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1248 struct md_op_data *op_data)
1249 {
1250 struct obd_device *obd = class_exp2obd(exp);
1251 struct lmv_obd *lmv = &obd->u.lmv;
1252 u32 mds = 0;
1253 int rc;
1254
1255 LASSERT(op_data != NULL);
1256 LASSERT(fid != NULL);
1257
1258 rc = lmv_placement_policy(obd, op_data, &mds);
1259 if (rc) {
1260 CERROR("Can't get target for allocating fid, rc %d\n",
1261 rc);
1262 return rc;
1263 }
1264
1265 rc = __lmv_fid_alloc(lmv, fid, mds);
1266 if (rc) {
1267 CERROR("Can't alloc new fid, rc %d\n", rc);
1268 return rc;
1269 }
1270
1271 return rc;
1272 }
1273
1274 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1275 {
1276 struct lmv_obd *lmv = &obd->u.lmv;
1277 struct lprocfs_static_vars lvars = { NULL };
1278 struct lmv_desc *desc;
1279 int rc;
1280
1281 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1282 CERROR("LMV setup requires a descriptor\n");
1283 return -EINVAL;
1284 }
1285
1286 desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1287 if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1288 CERROR("Lmv descriptor size wrong: %d > %d\n",
1289 (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1290 return -EINVAL;
1291 }
1292
1293 lmv->tgts = kcalloc(32, sizeof(*lmv->tgts), GFP_NOFS);
1294 if (lmv->tgts == NULL)
1295 return -ENOMEM;
1296 lmv->tgts_size = 32;
1297
1298 obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1299 lmv->desc.ld_tgt_count = 0;
1300 lmv->desc.ld_active_tgt_count = 0;
1301 lmv->max_cookiesize = 0;
1302 lmv->max_def_easize = 0;
1303 lmv->max_easize = 0;
1304 lmv->lmv_placement = PLACEMENT_CHAR_POLICY;
1305
1306 spin_lock_init(&lmv->lmv_lock);
1307 mutex_init(&lmv->init_mutex);
1308
1309 lprocfs_lmv_init_vars(&lvars);
1310
1311 lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars);
1312 rc = ldebugfs_seq_create(obd->obd_debugfs_entry, "target_obd",
1313 0444, &lmv_proc_target_fops, obd);
1314 if (rc)
1315 CWARN("%s: error adding LMV target_obd file: rc = %d\n",
1316 obd->obd_name, rc);
1317 rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1318 LUSTRE_CLI_FLD_HASH_DHT);
1319 if (rc) {
1320 CERROR("Can't init FLD, err %d\n", rc);
1321 goto out;
1322 }
1323
1324 return 0;
1325
1326 out:
1327 return rc;
1328 }
1329
1330 static int lmv_cleanup(struct obd_device *obd)
1331 {
1332 struct lmv_obd *lmv = &obd->u.lmv;
1333
1334 fld_client_fini(&lmv->lmv_fld);
1335 if (lmv->tgts != NULL) {
1336 int i;
1337
1338 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1339 if (lmv->tgts[i] == NULL)
1340 continue;
1341 lmv_del_target(lmv, i);
1342 }
1343 kfree(lmv->tgts);
1344 lmv->tgts_size = 0;
1345 }
1346 return 0;
1347 }
1348
1349 static int lmv_process_config(struct obd_device *obd, u32 len, void *buf)
1350 {
1351 struct lustre_cfg *lcfg = buf;
1352 struct obd_uuid obd_uuid;
1353 int gen;
1354 __u32 index;
1355 int rc;
1356
1357 switch (lcfg->lcfg_command) {
1358 case LCFG_ADD_MDC:
1359 /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
1360 * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
1361 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid)) {
1362 rc = -EINVAL;
1363 goto out;
1364 }
1365
1366 obd_str2uuid(&obd_uuid, lustre_cfg_buf(lcfg, 1));
1367
1368 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1) {
1369 rc = -EINVAL;
1370 goto out;
1371 }
1372 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1) {
1373 rc = -EINVAL;
1374 goto out;
1375 }
1376 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1377 goto out;
1378 default:
1379 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1380 rc = -EINVAL;
1381 goto out;
1382 }
1383 out:
1384 return rc;
1385 }
1386
1387 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1388 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1389 {
1390 struct obd_device *obd = class_exp2obd(exp);
1391 struct lmv_obd *lmv = &obd->u.lmv;
1392 struct obd_statfs *temp;
1393 int rc = 0;
1394 int i;
1395
1396 rc = lmv_check_connect(obd);
1397 if (rc)
1398 return rc;
1399
1400 temp = kzalloc(sizeof(*temp), GFP_NOFS);
1401 if (!temp)
1402 return -ENOMEM;
1403
1404 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1405 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1406 continue;
1407
1408 rc = obd_statfs(env, lmv->tgts[i]->ltd_exp, temp,
1409 max_age, flags);
1410 if (rc) {
1411 CERROR("can't stat MDS #%d (%s), error %d\n", i,
1412 lmv->tgts[i]->ltd_exp->exp_obd->obd_name,
1413 rc);
1414 goto out_free_temp;
1415 }
1416
1417 if (i == 0) {
1418 *osfs = *temp;
1419 /* If the statfs is from mount, it will needs
1420 * retrieve necessary information from MDT0.
1421 * i.e. mount does not need the merged osfs
1422 * from all of MDT.
1423 * And also clients can be mounted as long as
1424 * MDT0 is in service*/
1425 if (flags & OBD_STATFS_FOR_MDT0)
1426 goto out_free_temp;
1427 } else {
1428 osfs->os_bavail += temp->os_bavail;
1429 osfs->os_blocks += temp->os_blocks;
1430 osfs->os_ffree += temp->os_ffree;
1431 osfs->os_files += temp->os_files;
1432 }
1433 }
1434
1435 out_free_temp:
1436 kfree(temp);
1437 return rc;
1438 }
1439
1440 static int lmv_getstatus(struct obd_export *exp,
1441 struct lu_fid *fid)
1442 {
1443 struct obd_device *obd = exp->exp_obd;
1444 struct lmv_obd *lmv = &obd->u.lmv;
1445 int rc;
1446
1447 rc = lmv_check_connect(obd);
1448 if (rc)
1449 return rc;
1450
1451 rc = md_getstatus(lmv->tgts[0]->ltd_exp, fid);
1452 return rc;
1453 }
1454
1455 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1456 u64 valid, const char *name,
1457 const char *input, int input_size, int output_size,
1458 int flags, struct ptlrpc_request **request)
1459 {
1460 struct obd_device *obd = exp->exp_obd;
1461 struct lmv_obd *lmv = &obd->u.lmv;
1462 struct lmv_tgt_desc *tgt;
1463 int rc;
1464
1465 rc = lmv_check_connect(obd);
1466 if (rc)
1467 return rc;
1468
1469 tgt = lmv_find_target(lmv, fid);
1470 if (IS_ERR(tgt))
1471 return PTR_ERR(tgt);
1472
1473 rc = md_getxattr(tgt->ltd_exp, fid, valid, name, input,
1474 input_size, output_size, flags, request);
1475
1476 return rc;
1477 }
1478
1479 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1480 u64 valid, const char *name,
1481 const char *input, int input_size, int output_size,
1482 int flags, __u32 suppgid,
1483 struct ptlrpc_request **request)
1484 {
1485 struct obd_device *obd = exp->exp_obd;
1486 struct lmv_obd *lmv = &obd->u.lmv;
1487 struct lmv_tgt_desc *tgt;
1488 int rc;
1489
1490 rc = lmv_check_connect(obd);
1491 if (rc)
1492 return rc;
1493
1494 tgt = lmv_find_target(lmv, fid);
1495 if (IS_ERR(tgt))
1496 return PTR_ERR(tgt);
1497
1498 rc = md_setxattr(tgt->ltd_exp, fid, valid, name, input,
1499 input_size, output_size, flags, suppgid,
1500 request);
1501
1502 return rc;
1503 }
1504
1505 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1506 struct ptlrpc_request **request)
1507 {
1508 struct obd_device *obd = exp->exp_obd;
1509 struct lmv_obd *lmv = &obd->u.lmv;
1510 struct lmv_tgt_desc *tgt;
1511 int rc;
1512
1513 rc = lmv_check_connect(obd);
1514 if (rc)
1515 return rc;
1516
1517 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1518 if (IS_ERR(tgt))
1519 return PTR_ERR(tgt);
1520
1521 if (op_data->op_flags & MF_GET_MDT_IDX) {
1522 op_data->op_mds = tgt->ltd_idx;
1523 return 0;
1524 }
1525
1526 rc = md_getattr(tgt->ltd_exp, op_data, request);
1527
1528 return rc;
1529 }
1530
1531 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1532 {
1533 struct obd_device *obd = exp->exp_obd;
1534 struct lmv_obd *lmv = &obd->u.lmv;
1535 int i;
1536 int rc;
1537
1538 rc = lmv_check_connect(obd);
1539 if (rc)
1540 return rc;
1541
1542 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1543
1544 /*
1545 * With DNE every object can have two locks in different namespaces:
1546 * lookup lock in space of MDT storing direntry and update/open lock in
1547 * space of MDT storing inode.
1548 */
1549 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1550 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1551 continue;
1552 md_null_inode(lmv->tgts[i]->ltd_exp, fid);
1553 }
1554
1555 return 0;
1556 }
1557
1558 static int lmv_find_cbdata(struct obd_export *exp, const struct lu_fid *fid,
1559 ldlm_iterator_t it, void *data)
1560 {
1561 struct obd_device *obd = exp->exp_obd;
1562 struct lmv_obd *lmv = &obd->u.lmv;
1563 int i;
1564 int rc;
1565
1566 rc = lmv_check_connect(obd);
1567 if (rc)
1568 return rc;
1569
1570 CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1571
1572 /*
1573 * With DNE every object can have two locks in different namespaces:
1574 * lookup lock in space of MDT storing direntry and update/open lock in
1575 * space of MDT storing inode.
1576 */
1577 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
1578 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL)
1579 continue;
1580 rc = md_find_cbdata(lmv->tgts[i]->ltd_exp, fid, it, data);
1581 if (rc)
1582 return rc;
1583 }
1584
1585 return rc;
1586 }
1587
1588 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1589 struct md_open_data *mod, struct ptlrpc_request **request)
1590 {
1591 struct obd_device *obd = exp->exp_obd;
1592 struct lmv_obd *lmv = &obd->u.lmv;
1593 struct lmv_tgt_desc *tgt;
1594 int rc;
1595
1596 rc = lmv_check_connect(obd);
1597 if (rc)
1598 return rc;
1599
1600 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1601 if (IS_ERR(tgt))
1602 return PTR_ERR(tgt);
1603
1604 CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1605 rc = md_close(tgt->ltd_exp, op_data, mod, request);
1606 return rc;
1607 }
1608
1609 struct lmv_tgt_desc
1610 *lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
1611 struct lu_fid *fid)
1612 {
1613 struct lmv_tgt_desc *tgt;
1614
1615 tgt = lmv_find_target(lmv, fid);
1616 if (IS_ERR(tgt))
1617 return tgt;
1618
1619 op_data->op_mds = tgt->ltd_idx;
1620
1621 return tgt;
1622 }
1623
1624 static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1625 const void *data, int datalen, int mode, __u32 uid,
1626 __u32 gid, cfs_cap_t cap_effective, __u64 rdev,
1627 struct ptlrpc_request **request)
1628 {
1629 struct obd_device *obd = exp->exp_obd;
1630 struct lmv_obd *lmv = &obd->u.lmv;
1631 struct lmv_tgt_desc *tgt;
1632 int rc;
1633
1634 rc = lmv_check_connect(obd);
1635 if (rc)
1636 return rc;
1637
1638 if (!lmv->desc.ld_active_tgt_count)
1639 return -EIO;
1640
1641 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1642 if (IS_ERR(tgt))
1643 return PTR_ERR(tgt);
1644
1645 rc = lmv_fid_alloc(exp, &op_data->op_fid2, op_data);
1646 if (rc)
1647 return rc;
1648
1649 CDEBUG(D_INODE, "CREATE '%*s' on "DFID" -> mds #%x\n",
1650 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1651 op_data->op_mds);
1652
1653 op_data->op_flags |= MF_MDC_CANCEL_FID1;
1654 rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1655 cap_effective, rdev, request);
1656
1657 if (rc == 0) {
1658 if (*request == NULL)
1659 return rc;
1660 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1661 }
1662 return rc;
1663 }
1664
1665 static int lmv_done_writing(struct obd_export *exp,
1666 struct md_op_data *op_data,
1667 struct md_open_data *mod)
1668 {
1669 struct obd_device *obd = exp->exp_obd;
1670 struct lmv_obd *lmv = &obd->u.lmv;
1671 struct lmv_tgt_desc *tgt;
1672 int rc;
1673
1674 rc = lmv_check_connect(obd);
1675 if (rc)
1676 return rc;
1677
1678 tgt = lmv_find_target(lmv, &op_data->op_fid1);
1679 if (IS_ERR(tgt))
1680 return PTR_ERR(tgt);
1681
1682 rc = md_done_writing(tgt->ltd_exp, op_data, mod);
1683 return rc;
1684 }
1685
1686 static int
1687 lmv_enqueue_remote(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1688 struct lookup_intent *it, struct md_op_data *op_data,
1689 struct lustre_handle *lockh, void *lmm, int lmmsize,
1690 __u64 extra_lock_flags)
1691 {
1692 struct ptlrpc_request *req = it->d.lustre.it_data;
1693 struct obd_device *obd = exp->exp_obd;
1694 struct lmv_obd *lmv = &obd->u.lmv;
1695 struct lustre_handle plock;
1696 struct lmv_tgt_desc *tgt;
1697 struct md_op_data *rdata;
1698 struct lu_fid fid1;
1699 struct mdt_body *body;
1700 int rc = 0;
1701 int pmode;
1702
1703 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1704 LASSERT(body != NULL);
1705
1706 if (!(body->valid & OBD_MD_MDS))
1707 return 0;
1708
1709 CDEBUG(D_INODE, "REMOTE_ENQUEUE '%s' on "DFID" -> "DFID"\n",
1710 LL_IT2STR(it), PFID(&op_data->op_fid1), PFID(&body->fid1));
1711
1712 /*
1713 * We got LOOKUP lock, but we really need attrs.
1714 */
1715 pmode = it->d.lustre.it_lock_mode;
1716 LASSERT(pmode != 0);
1717 memcpy(&plock, lockh, sizeof(plock));
1718 it->d.lustre.it_lock_mode = 0;
1719 it->d.lustre.it_data = NULL;
1720 fid1 = body->fid1;
1721
1722 ptlrpc_req_finished(req);
1723
1724 tgt = lmv_find_target(lmv, &fid1);
1725 if (IS_ERR(tgt)) {
1726 rc = PTR_ERR(tgt);
1727 goto out;
1728 }
1729
1730 rdata = kzalloc(sizeof(*rdata), GFP_NOFS);
1731 if (!rdata) {
1732 rc = -ENOMEM;
1733 goto out;
1734 }
1735
1736 rdata->op_fid1 = fid1;
1737 rdata->op_bias = MDS_CROSS_REF;
1738
1739 rc = md_enqueue(tgt->ltd_exp, einfo, it, rdata, lockh,
1740 lmm, lmmsize, NULL, extra_lock_flags);
1741 kfree(rdata);
1742 out:
1743 ldlm_lock_decref(&plock, pmode);
1744 return rc;
1745 }
1746
1747 static int
1748 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1749 struct lookup_intent *it, struct md_op_data *op_data,
1750 struct lustre_handle *lockh, void *lmm, int lmmsize,
1751 struct ptlrpc_request **req, __u64 extra_lock_flags)
1752 {
1753 struct obd_device *obd = exp->exp_obd;
1754 struct lmv_obd *lmv = &obd->u.lmv;
1755 struct lmv_tgt_desc *tgt;
1756 int rc;
1757
1758 rc = lmv_check_connect(obd);
1759 if (rc)
1760 return rc;
1761
1762 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID"\n",
1763 LL_IT2STR(it), PFID(&op_data->op_fid1));
1764
1765 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1766 if (IS_ERR(tgt))
1767 return PTR_ERR(tgt);
1768
1769 CDEBUG(D_INODE, "ENQUEUE '%s' on "DFID" -> mds #%d\n",
1770 LL_IT2STR(it), PFID(&op_data->op_fid1), tgt->ltd_idx);
1771
1772 rc = md_enqueue(tgt->ltd_exp, einfo, it, op_data, lockh,
1773 lmm, lmmsize, req, extra_lock_flags);
1774
1775 if (rc == 0 && it && it->it_op == IT_OPEN) {
1776 rc = lmv_enqueue_remote(exp, einfo, it, op_data, lockh,
1777 lmm, lmmsize, extra_lock_flags);
1778 }
1779 return rc;
1780 }
1781
1782 static int
1783 lmv_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
1784 struct ptlrpc_request **request)
1785 {
1786 struct ptlrpc_request *req = NULL;
1787 struct obd_device *obd = exp->exp_obd;
1788 struct lmv_obd *lmv = &obd->u.lmv;
1789 struct lmv_tgt_desc *tgt;
1790 struct mdt_body *body;
1791 int rc;
1792
1793 rc = lmv_check_connect(obd);
1794 if (rc)
1795 return rc;
1796
1797 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1798 if (IS_ERR(tgt))
1799 return PTR_ERR(tgt);
1800
1801 CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1802 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1803 tgt->ltd_idx);
1804
1805 rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1806 if (rc != 0)
1807 return rc;
1808
1809 body = req_capsule_server_get(&(*request)->rq_pill,
1810 &RMF_MDT_BODY);
1811 LASSERT(body != NULL);
1812
1813 if (body->valid & OBD_MD_MDS) {
1814 struct lu_fid rid = body->fid1;
1815
1816 CDEBUG(D_INODE, "Request attrs for "DFID"\n",
1817 PFID(&rid));
1818
1819 tgt = lmv_find_target(lmv, &rid);
1820 if (IS_ERR(tgt)) {
1821 ptlrpc_req_finished(*request);
1822 return PTR_ERR(tgt);
1823 }
1824
1825 op_data->op_fid1 = rid;
1826 op_data->op_valid |= OBD_MD_FLCROSSREF;
1827 op_data->op_namelen = 0;
1828 op_data->op_name = NULL;
1829 rc = md_getattr_name(tgt->ltd_exp, op_data, &req);
1830 ptlrpc_req_finished(*request);
1831 *request = req;
1832 }
1833
1834 return rc;
1835 }
1836
1837 #define md_op_data_fid(op_data, fl) \
1838 (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1839 fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1840 fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1841 fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1842 NULL)
1843
1844 static int lmv_early_cancel(struct obd_export *exp, struct md_op_data *op_data,
1845 int op_tgt, ldlm_mode_t mode, int bits, int flag)
1846 {
1847 struct lu_fid *fid = md_op_data_fid(op_data, flag);
1848 struct obd_device *obd = exp->exp_obd;
1849 struct lmv_obd *lmv = &obd->u.lmv;
1850 struct lmv_tgt_desc *tgt;
1851 ldlm_policy_data_t policy = { {0} };
1852 int rc = 0;
1853
1854 if (!fid_is_sane(fid))
1855 return 0;
1856
1857 tgt = lmv_find_target(lmv, fid);
1858 if (IS_ERR(tgt))
1859 return PTR_ERR(tgt);
1860
1861 if (tgt->ltd_idx != op_tgt) {
1862 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1863 policy.l_inodebits.bits = bits;
1864 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1865 mode, LCF_ASYNC, NULL);
1866 } else {
1867 CDEBUG(D_INODE,
1868 "EARLY_CANCEL skip operation target %d on "DFID"\n",
1869 op_tgt, PFID(fid));
1870 op_data->op_flags |= flag;
1871 rc = 0;
1872 }
1873
1874 return rc;
1875 }
1876
1877 /*
1878 * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1879 * op_data->op_fid2
1880 */
1881 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1882 struct ptlrpc_request **request)
1883 {
1884 struct obd_device *obd = exp->exp_obd;
1885 struct lmv_obd *lmv = &obd->u.lmv;
1886 struct lmv_tgt_desc *tgt;
1887 int rc;
1888
1889 rc = lmv_check_connect(obd);
1890 if (rc)
1891 return rc;
1892
1893 LASSERT(op_data->op_namelen != 0);
1894
1895 CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1896 PFID(&op_data->op_fid2), op_data->op_namelen,
1897 op_data->op_name, PFID(&op_data->op_fid1));
1898
1899 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1900 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1901 op_data->op_cap = cfs_curproc_cap_pack();
1902 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1903 if (IS_ERR(tgt))
1904 return PTR_ERR(tgt);
1905
1906 /*
1907 * Cancel UPDATE lock on child (fid1).
1908 */
1909 op_data->op_flags |= MF_MDC_CANCEL_FID2;
1910 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
1911 MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1912 if (rc != 0)
1913 return rc;
1914
1915 rc = md_link(tgt->ltd_exp, op_data, request);
1916
1917 return rc;
1918 }
1919
1920 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
1921 const char *old, int oldlen, const char *new, int newlen,
1922 struct ptlrpc_request **request)
1923 {
1924 struct obd_device *obd = exp->exp_obd;
1925 struct lmv_obd *lmv = &obd->u.lmv;
1926 struct lmv_tgt_desc *src_tgt;
1927 struct lmv_tgt_desc *tgt_tgt;
1928 int rc;
1929
1930 LASSERT(oldlen != 0);
1931
1932 CDEBUG(D_INODE, "RENAME %*s in "DFID" to %*s in "DFID"\n",
1933 oldlen, old, PFID(&op_data->op_fid1),
1934 newlen, new, PFID(&op_data->op_fid2));
1935
1936 rc = lmv_check_connect(obd);
1937 if (rc)
1938 return rc;
1939
1940 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1941 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1942 op_data->op_cap = cfs_curproc_cap_pack();
1943 src_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
1944 if (IS_ERR(src_tgt))
1945 return PTR_ERR(src_tgt);
1946
1947 tgt_tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
1948 if (IS_ERR(tgt_tgt))
1949 return PTR_ERR(tgt_tgt);
1950 /*
1951 * LOOKUP lock on src child (fid3) should also be cancelled for
1952 * src_tgt in mdc_rename.
1953 */
1954 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
1955
1956 /*
1957 * Cancel UPDATE locks on tgt parent (fid2), tgt_tgt is its
1958 * own target.
1959 */
1960 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
1961 LCK_EX, MDS_INODELOCK_UPDATE,
1962 MF_MDC_CANCEL_FID2);
1963
1964 /*
1965 * Cancel LOOKUP locks on tgt child (fid4) for parent tgt_tgt.
1966 */
1967 if (rc == 0) {
1968 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
1969 LCK_EX, MDS_INODELOCK_LOOKUP,
1970 MF_MDC_CANCEL_FID4);
1971 }
1972
1973 /*
1974 * Cancel all the locks on tgt child (fid4).
1975 */
1976 if (rc == 0)
1977 rc = lmv_early_cancel(exp, op_data, src_tgt->ltd_idx,
1978 LCK_EX, MDS_INODELOCK_FULL,
1979 MF_MDC_CANCEL_FID4);
1980
1981 if (rc == 0)
1982 rc = md_rename(src_tgt->ltd_exp, op_data, old, oldlen,
1983 new, newlen, request);
1984 return rc;
1985 }
1986
1987 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
1988 void *ea, int ealen, void *ea2, int ea2len,
1989 struct ptlrpc_request **request,
1990 struct md_open_data **mod)
1991 {
1992 struct obd_device *obd = exp->exp_obd;
1993 struct lmv_obd *lmv = &obd->u.lmv;
1994 struct lmv_tgt_desc *tgt;
1995 int rc;
1996
1997 rc = lmv_check_connect(obd);
1998 if (rc)
1999 return rc;
2000
2001 CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x\n",
2002 PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
2003
2004 op_data->op_flags |= MF_MDC_CANCEL_FID1;
2005 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2006 if (IS_ERR(tgt))
2007 return PTR_ERR(tgt);
2008
2009 rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, ea2,
2010 ea2len, request, mod);
2011
2012 return rc;
2013 }
2014
2015 static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
2016 struct ptlrpc_request **request)
2017 {
2018 struct obd_device *obd = exp->exp_obd;
2019 struct lmv_obd *lmv = &obd->u.lmv;
2020 struct lmv_tgt_desc *tgt;
2021 int rc;
2022
2023 rc = lmv_check_connect(obd);
2024 if (rc)
2025 return rc;
2026
2027 tgt = lmv_find_target(lmv, fid);
2028 if (IS_ERR(tgt))
2029 return PTR_ERR(tgt);
2030
2031 rc = md_sync(tgt->ltd_exp, fid, request);
2032 return rc;
2033 }
2034
2035 /*
2036 * Adjust a set of pages, each page containing an array of lu_dirpages,
2037 * so that each page can be used as a single logical lu_dirpage.
2038 *
2039 * A lu_dirpage is laid out as follows, where s = ldp_hash_start,
2040 * e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
2041 * struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
2042 * value is used as a cookie to request the next lu_dirpage in a
2043 * directory listing that spans multiple pages (two in this example):
2044 * ________
2045 * | |
2046 * .|--------v------- -----.
2047 * |s|e|f|p|ent|ent| ... |ent|
2048 * '--|-------------- -----' Each CFS_PAGE contains a single
2049 * '------. lu_dirpage.
2050 * .---------v------- -----.
2051 * |s|e|f|p|ent| 0 | ... | 0 |
2052 * '----------------- -----'
2053 *
2054 * However, on hosts where the native VM page size (PAGE_CACHE_SIZE) is
2055 * larger than LU_PAGE_SIZE, a single host page may contain multiple
2056 * lu_dirpages. After reading the lu_dirpages from the MDS, the
2057 * ldp_hash_end of the first lu_dirpage refers to the one immediately
2058 * after it in the same CFS_PAGE (arrows simplified for brevity, but
2059 * in general e0==s1, e1==s2, etc.):
2060 *
2061 * .-------------------- -----.
2062 * |s0|e0|f0|p|ent|ent| ... |ent|
2063 * |---v---------------- -----|
2064 * |s1|e1|f1|p|ent|ent| ... |ent|
2065 * |---v---------------- -----| Here, each CFS_PAGE contains
2066 * ... multiple lu_dirpages.
2067 * |---v---------------- -----|
2068 * |s'|e'|f'|p|ent|ent| ... |ent|
2069 * '---|---------------- -----'
2070 * v
2071 * .----------------------------.
2072 * | next CFS_PAGE |
2073 *
2074 * This structure is transformed into a single logical lu_dirpage as follows:
2075 *
2076 * - Replace e0 with e' so the request for the next lu_dirpage gets the page
2077 * labeled 'next CFS_PAGE'.
2078 *
2079 * - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
2080 * a hash collision with the next page exists.
2081 *
2082 * - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
2083 * to the first entry of the next lu_dirpage.
2084 */
2085 #if PAGE_CACHE_SIZE > LU_PAGE_SIZE
2086 static void lmv_adjust_dirpages(struct page **pages, int ncfspgs, int nlupgs)
2087 {
2088 int i;
2089
2090 for (i = 0; i < ncfspgs; i++) {
2091 struct lu_dirpage *dp = kmap(pages[i]);
2092 struct lu_dirpage *first = dp;
2093 struct lu_dirent *end_dirent = NULL;
2094 struct lu_dirent *ent;
2095 __u64 hash_end = dp->ldp_hash_end;
2096 __u32 flags = dp->ldp_flags;
2097
2098 while (--nlupgs > 0) {
2099 ent = lu_dirent_start(dp);
2100 for (end_dirent = ent; ent != NULL;
2101 end_dirent = ent, ent = lu_dirent_next(ent))
2102 ;
2103
2104 /* Advance dp to next lu_dirpage. */
2105 dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
2106
2107 /* Check if we've reached the end of the CFS_PAGE. */
2108 if (!((unsigned long)dp & ~CFS_PAGE_MASK))
2109 break;
2110
2111 /* Save the hash and flags of this lu_dirpage. */
2112 hash_end = dp->ldp_hash_end;
2113 flags = dp->ldp_flags;
2114
2115 /* Check if lu_dirpage contains no entries. */
2116 if (!end_dirent)
2117 break;
2118
2119 /* Enlarge the end entry lde_reclen from 0 to
2120 * first entry of next lu_dirpage. */
2121 LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
2122 end_dirent->lde_reclen =
2123 cpu_to_le16((char *)(dp->ldp_entries) -
2124 (char *)end_dirent);
2125 }
2126
2127 first->ldp_hash_end = hash_end;
2128 first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
2129 first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
2130
2131 kunmap(pages[i]);
2132 }
2133 LASSERTF(nlupgs == 0, "left = %d", nlupgs);
2134 }
2135 #else
2136 #define lmv_adjust_dirpages(pages, ncfspgs, nlupgs) do {} while (0)
2137 #endif /* PAGE_CACHE_SIZE > LU_PAGE_SIZE */
2138
2139 static int lmv_readpage(struct obd_export *exp, struct md_op_data *op_data,
2140 struct page **pages, struct ptlrpc_request **request)
2141 {
2142 struct obd_device *obd = exp->exp_obd;
2143 struct lmv_obd *lmv = &obd->u.lmv;
2144 __u64 offset = op_data->op_offset;
2145 int rc;
2146 int ncfspgs; /* pages read in PAGE_CACHE_SIZE */
2147 int nlupgs; /* pages read in LU_PAGE_SIZE */
2148 struct lmv_tgt_desc *tgt;
2149
2150 rc = lmv_check_connect(obd);
2151 if (rc)
2152 return rc;
2153
2154 CDEBUG(D_INODE, "READPAGE at %#llx from "DFID"\n",
2155 offset, PFID(&op_data->op_fid1));
2156
2157 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2158 if (IS_ERR(tgt))
2159 return PTR_ERR(tgt);
2160
2161 rc = md_readpage(tgt->ltd_exp, op_data, pages, request);
2162 if (rc != 0)
2163 return rc;
2164
2165 ncfspgs = ((*request)->rq_bulk->bd_nob_transferred + PAGE_CACHE_SIZE - 1)
2166 >> PAGE_CACHE_SHIFT;
2167 nlupgs = (*request)->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
2168 LASSERT(!((*request)->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
2169 LASSERT(ncfspgs > 0 && ncfspgs <= op_data->op_npages);
2170
2171 CDEBUG(D_INODE, "read %d(%d)/%d pages\n", ncfspgs, nlupgs,
2172 op_data->op_npages);
2173
2174 lmv_adjust_dirpages(pages, ncfspgs, nlupgs);
2175
2176 return rc;
2177 }
2178
2179 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2180 struct ptlrpc_request **request)
2181 {
2182 struct obd_device *obd = exp->exp_obd;
2183 struct lmv_obd *lmv = &obd->u.lmv;
2184 struct lmv_tgt_desc *tgt = NULL;
2185 struct mdt_body *body;
2186 int rc;
2187
2188 rc = lmv_check_connect(obd);
2189 if (rc)
2190 return rc;
2191 retry:
2192 /* Send unlink requests to the MDT where the child is located */
2193 if (likely(!fid_is_zero(&op_data->op_fid2)))
2194 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid2);
2195 else
2196 tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
2197 if (IS_ERR(tgt))
2198 return PTR_ERR(tgt);
2199
2200 op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2201 op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2202 op_data->op_cap = cfs_curproc_cap_pack();
2203
2204 /*
2205 * If child's fid is given, cancel unused locks for it if it is from
2206 * another export than parent.
2207 *
2208 * LOOKUP lock for child (fid3) should also be cancelled on parent
2209 * tgt_tgt in mdc_unlink().
2210 */
2211 op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2212
2213 /*
2214 * Cancel FULL locks on child (fid3).
2215 */
2216 rc = lmv_early_cancel(exp, op_data, tgt->ltd_idx, LCK_EX,
2217 MDS_INODELOCK_FULL, MF_MDC_CANCEL_FID3);
2218
2219 if (rc != 0)
2220 return rc;
2221
2222 CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%d\n",
2223 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2), tgt->ltd_idx);
2224
2225 rc = md_unlink(tgt->ltd_exp, op_data, request);
2226 if (rc != 0 && rc != -EREMOTE)
2227 return rc;
2228
2229 body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2230 if (body == NULL)
2231 return -EPROTO;
2232
2233 /* Not cross-ref case, just get out of here. */
2234 if (likely(!(body->valid & OBD_MD_MDS)))
2235 return 0;
2236
2237 CDEBUG(D_INODE, "%s: try unlink to another MDT for "DFID"\n",
2238 exp->exp_obd->obd_name, PFID(&body->fid1));
2239
2240 /* This is a remote object, try remote MDT, Note: it may
2241 * try more than 1 time here, Considering following case
2242 * /mnt/lustre is root on MDT0, remote1 is on MDT1
2243 * 1. Initially A does not know where remote1 is, it send
2244 * unlink RPC to MDT0, MDT0 return -EREMOTE, it will
2245 * resend unlink RPC to MDT1 (retry 1st time).
2246 *
2247 * 2. During the unlink RPC in flight,
2248 * client B mv /mnt/lustre/remote1 /mnt/lustre/remote2
2249 * and create new remote1, but on MDT0
2250 *
2251 * 3. MDT1 get unlink RPC(from A), then do remote lock on
2252 * /mnt/lustre, then lookup get fid of remote1, and find
2253 * it is remote dir again, and replay -EREMOTE again.
2254 *
2255 * 4. Then A will resend unlink RPC to MDT0. (retry 2nd times).
2256 *
2257 * In theory, it might try unlimited time here, but it should
2258 * be very rare case. */
2259 op_data->op_fid2 = body->fid1;
2260 ptlrpc_req_finished(*request);
2261 *request = NULL;
2262
2263 goto retry;
2264 }
2265
2266 static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2267 {
2268 struct lmv_obd *lmv = &obd->u.lmv;
2269
2270 switch (stage) {
2271 case OBD_CLEANUP_EARLY:
2272 /* XXX: here should be calling obd_precleanup() down to
2273 * stack. */
2274 break;
2275 case OBD_CLEANUP_EXPORTS:
2276 fld_client_debugfs_fini(&lmv->lmv_fld);
2277 lprocfs_obd_cleanup(obd);
2278 break;
2279 default:
2280 break;
2281 }
2282 return 0;
2283 }
2284
2285 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2286 __u32 keylen, void *key, __u32 *vallen, void *val,
2287 struct lov_stripe_md *lsm)
2288 {
2289 struct obd_device *obd;
2290 struct lmv_obd *lmv;
2291 int rc = 0;
2292
2293 obd = class_exp2obd(exp);
2294 if (obd == NULL) {
2295 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2296 exp->exp_handle.h_cookie);
2297 return -EINVAL;
2298 }
2299
2300 lmv = &obd->u.lmv;
2301 if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2302 struct lmv_tgt_desc *tgt;
2303 int i;
2304
2305 rc = lmv_check_connect(obd);
2306 if (rc)
2307 return rc;
2308
2309 LASSERT(*vallen == sizeof(__u32));
2310 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2311 tgt = lmv->tgts[i];
2312 /*
2313 * All tgts should be connected when this gets called.
2314 */
2315 if (tgt == NULL || tgt->ltd_exp == NULL)
2316 continue;
2317
2318 if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2319 vallen, val, NULL))
2320 return 0;
2321 }
2322 return -EINVAL;
2323 } else if (KEY_IS(KEY_MAX_EASIZE) ||
2324 KEY_IS(KEY_DEFAULT_EASIZE) ||
2325 KEY_IS(KEY_CONN_DATA)) {
2326 rc = lmv_check_connect(obd);
2327 if (rc)
2328 return rc;
2329
2330 /*
2331 * Forwarding this request to first MDS, it should know LOV
2332 * desc.
2333 */
2334 rc = obd_get_info(env, lmv->tgts[0]->ltd_exp, keylen, key,
2335 vallen, val, NULL);
2336 if (!rc && KEY_IS(KEY_CONN_DATA))
2337 exp->exp_connect_data = *(struct obd_connect_data *)val;
2338 return rc;
2339 } else if (KEY_IS(KEY_TGT_COUNT)) {
2340 *((int *)val) = lmv->desc.ld_tgt_count;
2341 return 0;
2342 }
2343
2344 CDEBUG(D_IOCTL, "Invalid key\n");
2345 return -EINVAL;
2346 }
2347
2348 static int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2349 u32 keylen, void *key, u32 vallen,
2350 void *val, struct ptlrpc_request_set *set)
2351 {
2352 struct lmv_tgt_desc *tgt;
2353 struct obd_device *obd;
2354 struct lmv_obd *lmv;
2355 int rc = 0;
2356
2357 obd = class_exp2obd(exp);
2358 if (obd == NULL) {
2359 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2360 exp->exp_handle.h_cookie);
2361 return -EINVAL;
2362 }
2363 lmv = &obd->u.lmv;
2364
2365 if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
2366 int i, err = 0;
2367
2368 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2369 tgt = lmv->tgts[i];
2370
2371 if (tgt == NULL || tgt->ltd_exp == NULL)
2372 continue;
2373
2374 err = obd_set_info_async(env, tgt->ltd_exp,
2375 keylen, key, vallen, val, set);
2376 if (err && rc == 0)
2377 rc = err;
2378 }
2379
2380 return rc;
2381 }
2382
2383 return -EINVAL;
2384 }
2385
2386 static int lmv_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
2387 struct lov_stripe_md *lsm)
2388 {
2389 struct obd_device *obd = class_exp2obd(exp);
2390 struct lmv_obd *lmv = &obd->u.lmv;
2391 struct lmv_stripe_md *meap;
2392 struct lmv_stripe_md *lsmp;
2393 int mea_size;
2394 int i;
2395
2396 mea_size = lmv_get_easize(lmv);
2397 if (!lmmp)
2398 return mea_size;
2399
2400 if (*lmmp && !lsm) {
2401 kvfree(*lmmp);
2402 *lmmp = NULL;
2403 return 0;
2404 }
2405
2406 if (*lmmp == NULL) {
2407 *lmmp = libcfs_kvzalloc(mea_size, GFP_NOFS);
2408 if (*lmmp == NULL)
2409 return -ENOMEM;
2410 }
2411
2412 if (!lsm)
2413 return mea_size;
2414
2415 lsmp = (struct lmv_stripe_md *)lsm;
2416 meap = (struct lmv_stripe_md *)*lmmp;
2417
2418 if (lsmp->mea_magic != MEA_MAGIC_LAST_CHAR &&
2419 lsmp->mea_magic != MEA_MAGIC_ALL_CHARS)
2420 return -EINVAL;
2421
2422 meap->mea_magic = cpu_to_le32(lsmp->mea_magic);
2423 meap->mea_count = cpu_to_le32(lsmp->mea_count);
2424 meap->mea_master = cpu_to_le32(lsmp->mea_master);
2425
2426 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2427 meap->mea_ids[i] = lsmp->mea_ids[i];
2428 fid_cpu_to_le(&meap->mea_ids[i], &lsmp->mea_ids[i]);
2429 }
2430
2431 return mea_size;
2432 }
2433
2434 static int lmv_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
2435 struct lov_mds_md *lmm, int lmm_size)
2436 {
2437 struct obd_device *obd = class_exp2obd(exp);
2438 struct lmv_stripe_md **tmea = (struct lmv_stripe_md **)lsmp;
2439 struct lmv_stripe_md *mea = (struct lmv_stripe_md *)lmm;
2440 struct lmv_obd *lmv = &obd->u.lmv;
2441 int mea_size;
2442 int i;
2443 __u32 magic;
2444
2445 mea_size = lmv_get_easize(lmv);
2446 if (lsmp == NULL)
2447 return mea_size;
2448
2449 if (*lsmp != NULL && lmm == NULL) {
2450 kvfree(*tmea);
2451 *lsmp = NULL;
2452 return 0;
2453 }
2454
2455 LASSERT(mea_size == lmm_size);
2456
2457 *tmea = libcfs_kvzalloc(mea_size, GFP_NOFS);
2458 if (*tmea == NULL)
2459 return -ENOMEM;
2460
2461 if (!lmm)
2462 return mea_size;
2463
2464 if (mea->mea_magic == MEA_MAGIC_LAST_CHAR ||
2465 mea->mea_magic == MEA_MAGIC_ALL_CHARS ||
2466 mea->mea_magic == MEA_MAGIC_HASH_SEGMENT) {
2467 magic = le32_to_cpu(mea->mea_magic);
2468 } else {
2469 /*
2470 * Old mea is not handled here.
2471 */
2472 CERROR("Old not supportable EA is found\n");
2473 LBUG();
2474 }
2475
2476 (*tmea)->mea_magic = magic;
2477 (*tmea)->mea_count = le32_to_cpu(mea->mea_count);
2478 (*tmea)->mea_master = le32_to_cpu(mea->mea_master);
2479
2480 for (i = 0; i < (*tmea)->mea_count; i++) {
2481 (*tmea)->mea_ids[i] = mea->mea_ids[i];
2482 fid_le_to_cpu(&(*tmea)->mea_ids[i], &(*tmea)->mea_ids[i]);
2483 }
2484 return mea_size;
2485 }
2486
2487 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
2488 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2489 ldlm_cancel_flags_t flags, void *opaque)
2490 {
2491 struct obd_device *obd = exp->exp_obd;
2492 struct lmv_obd *lmv = &obd->u.lmv;
2493 int rc = 0;
2494 int err;
2495 int i;
2496
2497 LASSERT(fid != NULL);
2498
2499 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2500 if (lmv->tgts[i] == NULL || lmv->tgts[i]->ltd_exp == NULL ||
2501 lmv->tgts[i]->ltd_active == 0)
2502 continue;
2503
2504 err = md_cancel_unused(lmv->tgts[i]->ltd_exp, fid,
2505 policy, mode, flags, opaque);
2506 if (!rc)
2507 rc = err;
2508 }
2509 return rc;
2510 }
2511
2512 static int lmv_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
2513 __u64 *bits)
2514 {
2515 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2516 int rc;
2517
2518 rc = md_set_lock_data(lmv->tgts[0]->ltd_exp, lockh, data, bits);
2519 return rc;
2520 }
2521
2522 static ldlm_mode_t lmv_lock_match(struct obd_export *exp, __u64 flags,
2523 const struct lu_fid *fid, ldlm_type_t type,
2524 ldlm_policy_data_t *policy, ldlm_mode_t mode,
2525 struct lustre_handle *lockh)
2526 {
2527 struct obd_device *obd = exp->exp_obd;
2528 struct lmv_obd *lmv = &obd->u.lmv;
2529 ldlm_mode_t rc;
2530 int i;
2531
2532 CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
2533
2534 /*
2535 * With CMD every object can have two locks in different namespaces:
2536 * lookup lock in space of mds storing direntry and update/open lock in
2537 * space of mds storing inode. Thus we check all targets, not only that
2538 * one fid was created in.
2539 */
2540 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2541 if (lmv->tgts[i] == NULL ||
2542 lmv->tgts[i]->ltd_exp == NULL ||
2543 lmv->tgts[i]->ltd_active == 0)
2544 continue;
2545
2546 rc = md_lock_match(lmv->tgts[i]->ltd_exp, flags, fid,
2547 type, policy, mode, lockh);
2548 if (rc)
2549 return rc;
2550 }
2551
2552 return 0;
2553 }
2554
2555 static int lmv_get_lustre_md(struct obd_export *exp,
2556 struct ptlrpc_request *req,
2557 struct obd_export *dt_exp,
2558 struct obd_export *md_exp,
2559 struct lustre_md *md)
2560 {
2561 struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
2562
2563 return md_get_lustre_md(lmv->tgts[0]->ltd_exp, req, dt_exp, md_exp, md);
2564 }
2565
2566 static int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
2567 {
2568 struct obd_device *obd = exp->exp_obd;
2569 struct lmv_obd *lmv = &obd->u.lmv;
2570
2571 if (md->mea)
2572 obd_free_memmd(exp, (void *)&md->mea);
2573 return md_free_lustre_md(lmv->tgts[0]->ltd_exp, md);
2574 }
2575
2576 static int lmv_set_open_replay_data(struct obd_export *exp,
2577 struct obd_client_handle *och,
2578 struct lookup_intent *it)
2579 {
2580 struct obd_device *obd = exp->exp_obd;
2581 struct lmv_obd *lmv = &obd->u.lmv;
2582 struct lmv_tgt_desc *tgt;
2583
2584 tgt = lmv_find_target(lmv, &och->och_fid);
2585 if (IS_ERR(tgt))
2586 return PTR_ERR(tgt);
2587
2588 return md_set_open_replay_data(tgt->ltd_exp, och, it);
2589 }
2590
2591 static int lmv_clear_open_replay_data(struct obd_export *exp,
2592 struct obd_client_handle *och)
2593 {
2594 struct obd_device *obd = exp->exp_obd;
2595 struct lmv_obd *lmv = &obd->u.lmv;
2596 struct lmv_tgt_desc *tgt;
2597
2598 tgt = lmv_find_target(lmv, &och->och_fid);
2599 if (IS_ERR(tgt))
2600 return PTR_ERR(tgt);
2601
2602 return md_clear_open_replay_data(tgt->ltd_exp, och);
2603 }
2604
2605 static int lmv_get_remote_perm(struct obd_export *exp,
2606 const struct lu_fid *fid,
2607 __u32 suppgid, struct ptlrpc_request **request)
2608 {
2609 struct obd_device *obd = exp->exp_obd;
2610 struct lmv_obd *lmv = &obd->u.lmv;
2611 struct lmv_tgt_desc *tgt;
2612 int rc;
2613
2614 rc = lmv_check_connect(obd);
2615 if (rc)
2616 return rc;
2617
2618 tgt = lmv_find_target(lmv, fid);
2619 if (IS_ERR(tgt))
2620 return PTR_ERR(tgt);
2621
2622 rc = md_get_remote_perm(tgt->ltd_exp, fid, suppgid, request);
2623 return rc;
2624 }
2625
2626 static int lmv_intent_getattr_async(struct obd_export *exp,
2627 struct md_enqueue_info *minfo,
2628 struct ldlm_enqueue_info *einfo)
2629 {
2630 struct md_op_data *op_data = &minfo->mi_data;
2631 struct obd_device *obd = exp->exp_obd;
2632 struct lmv_obd *lmv = &obd->u.lmv;
2633 struct lmv_tgt_desc *tgt = NULL;
2634 int rc;
2635
2636 rc = lmv_check_connect(obd);
2637 if (rc)
2638 return rc;
2639
2640 tgt = lmv_find_target(lmv, &op_data->op_fid1);
2641 if (IS_ERR(tgt))
2642 return PTR_ERR(tgt);
2643
2644 rc = md_intent_getattr_async(tgt->ltd_exp, minfo, einfo);
2645 return rc;
2646 }
2647
2648 static int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
2649 struct lu_fid *fid, __u64 *bits)
2650 {
2651 struct obd_device *obd = exp->exp_obd;
2652 struct lmv_obd *lmv = &obd->u.lmv;
2653 struct lmv_tgt_desc *tgt;
2654 int rc;
2655
2656 rc = lmv_check_connect(obd);
2657 if (rc)
2658 return rc;
2659
2660 tgt = lmv_find_target(lmv, fid);
2661 if (IS_ERR(tgt))
2662 return PTR_ERR(tgt);
2663
2664 rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
2665 return rc;
2666 }
2667
2668 /**
2669 * For lmv, only need to send request to master MDT, and the master MDT will
2670 * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
2671 * we directly fetch data from the slave MDTs.
2672 */
2673 static int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
2674 struct obd_quotactl *oqctl)
2675 {
2676 struct obd_device *obd = class_exp2obd(exp);
2677 struct lmv_obd *lmv = &obd->u.lmv;
2678 struct lmv_tgt_desc *tgt = lmv->tgts[0];
2679 int rc = 0, i;
2680 __u64 curspace, curinodes;
2681
2682 if (!lmv->desc.ld_tgt_count || !tgt->ltd_active) {
2683 CERROR("master lmv inactive\n");
2684 return -EIO;
2685 }
2686
2687 if (oqctl->qc_cmd != Q_GETOQUOTA) {
2688 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2689 return rc;
2690 }
2691
2692 curspace = curinodes = 0;
2693 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2694 int err;
2695
2696 tgt = lmv->tgts[i];
2697
2698 if (tgt == NULL || tgt->ltd_exp == NULL || tgt->ltd_active == 0)
2699 continue;
2700 if (!tgt->ltd_active) {
2701 CDEBUG(D_HA, "mdt %d is inactive.\n", i);
2702 continue;
2703 }
2704
2705 err = obd_quotactl(tgt->ltd_exp, oqctl);
2706 if (err) {
2707 CERROR("getquota on mdt %d failed. %d\n", i, err);
2708 if (!rc)
2709 rc = err;
2710 } else {
2711 curspace += oqctl->qc_dqblk.dqb_curspace;
2712 curinodes += oqctl->qc_dqblk.dqb_curinodes;
2713 }
2714 }
2715 oqctl->qc_dqblk.dqb_curspace = curspace;
2716 oqctl->qc_dqblk.dqb_curinodes = curinodes;
2717
2718 return rc;
2719 }
2720
2721 static int lmv_quotacheck(struct obd_device *unused, struct obd_export *exp,
2722 struct obd_quotactl *oqctl)
2723 {
2724 struct obd_device *obd = class_exp2obd(exp);
2725 struct lmv_obd *lmv = &obd->u.lmv;
2726 struct lmv_tgt_desc *tgt;
2727 int i, rc = 0;
2728
2729 for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
2730 int err;
2731
2732 tgt = lmv->tgts[i];
2733 if (tgt == NULL || tgt->ltd_exp == NULL || !tgt->ltd_active) {
2734 CERROR("lmv idx %d inactive\n", i);
2735 return -EIO;
2736 }
2737
2738 err = obd_quotacheck(tgt->ltd_exp, oqctl);
2739 if (err && !rc)
2740 rc = err;
2741 }
2742
2743 return rc;
2744 }
2745
2746 static struct obd_ops lmv_obd_ops = {
2747 .owner = THIS_MODULE,
2748 .setup = lmv_setup,
2749 .cleanup = lmv_cleanup,
2750 .precleanup = lmv_precleanup,
2751 .process_config = lmv_process_config,
2752 .connect = lmv_connect,
2753 .disconnect = lmv_disconnect,
2754 .statfs = lmv_statfs,
2755 .get_info = lmv_get_info,
2756 .set_info_async = lmv_set_info_async,
2757 .packmd = lmv_packmd,
2758 .unpackmd = lmv_unpackmd,
2759 .notify = lmv_notify,
2760 .get_uuid = lmv_get_uuid,
2761 .iocontrol = lmv_iocontrol,
2762 .quotacheck = lmv_quotacheck,
2763 .quotactl = lmv_quotactl
2764 };
2765
2766 static struct md_ops lmv_md_ops = {
2767 .getstatus = lmv_getstatus,
2768 .null_inode = lmv_null_inode,
2769 .find_cbdata = lmv_find_cbdata,
2770 .close = lmv_close,
2771 .create = lmv_create,
2772 .done_writing = lmv_done_writing,
2773 .enqueue = lmv_enqueue,
2774 .getattr = lmv_getattr,
2775 .getxattr = lmv_getxattr,
2776 .getattr_name = lmv_getattr_name,
2777 .intent_lock = lmv_intent_lock,
2778 .link = lmv_link,
2779 .rename = lmv_rename,
2780 .setattr = lmv_setattr,
2781 .setxattr = lmv_setxattr,
2782 .sync = lmv_sync,
2783 .readpage = lmv_readpage,
2784 .unlink = lmv_unlink,
2785 .init_ea_size = lmv_init_ea_size,
2786 .cancel_unused = lmv_cancel_unused,
2787 .set_lock_data = lmv_set_lock_data,
2788 .lock_match = lmv_lock_match,
2789 .get_lustre_md = lmv_get_lustre_md,
2790 .free_lustre_md = lmv_free_lustre_md,
2791 .set_open_replay_data = lmv_set_open_replay_data,
2792 .clear_open_replay_data = lmv_clear_open_replay_data,
2793 .get_remote_perm = lmv_get_remote_perm,
2794 .intent_getattr_async = lmv_intent_getattr_async,
2795 .revalidate_lock = lmv_revalidate_lock
2796 };
2797
2798 static int __init lmv_init(void)
2799 {
2800 struct lprocfs_static_vars lvars;
2801 int rc;
2802
2803 lprocfs_lmv_init_vars(&lvars);
2804
2805 rc = class_register_type(&lmv_obd_ops, &lmv_md_ops,
2806 LUSTRE_LMV_NAME, NULL);
2807 return rc;
2808 }
2809
2810 static void lmv_exit(void)
2811 {
2812 class_unregister_type(LUSTRE_LMV_NAME);
2813 }
2814
2815 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
2816 MODULE_DESCRIPTION("Lustre Logical Metadata Volume OBD driver");
2817 MODULE_LICENSE("GPL");
2818
2819 module_init(lmv_init);
2820 module_exit(lmv_exit);
Linux kernel - Deliverables
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