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Merge branch 'opw-next' into staging-next
[mirror_ubuntu-artful-kernel.git] / drivers / staging / lustre / lustre / obdecho / echo_client.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) 2002, 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_ECHO
38 #include <linux/libcfs/libcfs.h>
39
40 #include <obd.h>
41 #include <obd_support.h>
42 #include <obd_class.h>
43 #include <lustre_debug.h>
44 #include <lprocfs_status.h>
45 #include <cl_object.h>
46 #include <md_object.h>
47 #include <lustre_fid.h>
48 #include <lustre_acl.h>
49 #include <lustre_net.h>
50 #include <obd_lov.h>
51
52 #include "echo_internal.h"
53
54 /** \defgroup echo_client Echo Client
55 * @{
56 */
57
58 struct echo_device {
59 struct cl_device ed_cl;
60 struct echo_client_obd *ed_ec;
61
62 struct cl_site ed_site_myself;
63 struct cl_site *ed_site;
64 struct lu_device *ed_next;
65 int ed_next_islov;
66 int ed_next_ismd;
67 struct lu_client_seq *ed_cl_seq;
68 };
69
70 struct echo_object {
71 struct cl_object eo_cl;
72 struct cl_object_header eo_hdr;
73
74 struct echo_device *eo_dev;
75 struct list_head eo_obj_chain;
76 struct lov_stripe_md *eo_lsm;
77 atomic_t eo_npages;
78 int eo_deleted;
79 };
80
81 struct echo_object_conf {
82 struct cl_object_conf eoc_cl;
83 struct lov_stripe_md **eoc_md;
84 };
85
86 struct echo_page {
87 struct cl_page_slice ep_cl;
88 struct mutex ep_lock;
89 struct page *ep_vmpage;
90 };
91
92 struct echo_lock {
93 struct cl_lock_slice el_cl;
94 struct list_head el_chain;
95 struct echo_object *el_object;
96 __u64 el_cookie;
97 atomic_t el_refcount;
98 };
99
100 struct echo_io {
101 struct cl_io_slice ei_cl;
102 };
103
104 #if 0
105 struct echo_req {
106 struct cl_req_slice er_cl;
107 };
108 #endif
109
110 static int echo_client_setup(const struct lu_env *env,
111 struct obd_device *obddev,
112 struct lustre_cfg *lcfg);
113 static int echo_client_cleanup(struct obd_device *obddev);
114
115
116 /** \defgroup echo_helpers Helper functions
117 * @{
118 */
119 static inline struct echo_device *cl2echo_dev(const struct cl_device *dev)
120 {
121 return container_of0(dev, struct echo_device, ed_cl);
122 }
123
124 static inline struct cl_device *echo_dev2cl(struct echo_device *d)
125 {
126 return &d->ed_cl;
127 }
128
129 static inline struct echo_device *obd2echo_dev(const struct obd_device *obd)
130 {
131 return cl2echo_dev(lu2cl_dev(obd->obd_lu_dev));
132 }
133
134 static inline struct cl_object *echo_obj2cl(struct echo_object *eco)
135 {
136 return &eco->eo_cl;
137 }
138
139 static inline struct echo_object *cl2echo_obj(const struct cl_object *o)
140 {
141 return container_of(o, struct echo_object, eo_cl);
142 }
143
144 static inline struct echo_page *cl2echo_page(const struct cl_page_slice *s)
145 {
146 return container_of(s, struct echo_page, ep_cl);
147 }
148
149 static inline struct echo_lock *cl2echo_lock(const struct cl_lock_slice *s)
150 {
151 return container_of(s, struct echo_lock, el_cl);
152 }
153
154 static inline struct cl_lock *echo_lock2cl(const struct echo_lock *ecl)
155 {
156 return ecl->el_cl.cls_lock;
157 }
158
159 static struct lu_context_key echo_thread_key;
160 static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
161 {
162 struct echo_thread_info *info;
163 info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
164 LASSERT(info != NULL);
165 return info;
166 }
167
168 static inline
169 struct echo_object_conf *cl2echo_conf(const struct cl_object_conf *c)
170 {
171 return container_of(c, struct echo_object_conf, eoc_cl);
172 }
173
174 /** @} echo_helpers */
175
176 static struct echo_object *cl_echo_object_find(struct echo_device *d,
177 struct lov_stripe_md **lsm);
178 static int cl_echo_object_put(struct echo_object *eco);
179 static int cl_echo_enqueue (struct echo_object *eco, obd_off start,
180 obd_off end, int mode, __u64 *cookie);
181 static int cl_echo_cancel (struct echo_device *d, __u64 cookie);
182 static int cl_echo_object_brw(struct echo_object *eco, int rw, obd_off offset,
183 struct page **pages, int npages, int async);
184
185 static struct echo_thread_info *echo_env_info(const struct lu_env *env);
186
187 struct echo_thread_info {
188 struct echo_object_conf eti_conf;
189 struct lustre_md eti_md;
190
191 struct cl_2queue eti_queue;
192 struct cl_io eti_io;
193 struct cl_lock_descr eti_descr;
194 struct lu_fid eti_fid;
195 struct lu_fid eti_fid2;
196 struct md_op_spec eti_spec;
197 struct lov_mds_md_v3 eti_lmm;
198 struct lov_user_md_v3 eti_lum;
199 struct md_attr eti_ma;
200 struct lu_name eti_lname;
201 /* per-thread values, can be re-used */
202 void *eti_big_lmm;
203 int eti_big_lmmsize;
204 char eti_name[20];
205 struct lu_buf eti_buf;
206 char eti_xattr_buf[LUSTRE_POSIX_ACL_MAX_SIZE];
207 };
208
209 /* No session used right now */
210 struct echo_session_info {
211 unsigned long dummy;
212 };
213
214 static struct kmem_cache *echo_lock_kmem;
215 static struct kmem_cache *echo_object_kmem;
216 static struct kmem_cache *echo_thread_kmem;
217 static struct kmem_cache *echo_session_kmem;
218 //static struct kmem_cache *echo_req_kmem;
219
220 static struct lu_kmem_descr echo_caches[] = {
221 {
222 .ckd_cache = &echo_lock_kmem,
223 .ckd_name = "echo_lock_kmem",
224 .ckd_size = sizeof (struct echo_lock)
225 },
226 {
227 .ckd_cache = &echo_object_kmem,
228 .ckd_name = "echo_object_kmem",
229 .ckd_size = sizeof (struct echo_object)
230 },
231 {
232 .ckd_cache = &echo_thread_kmem,
233 .ckd_name = "echo_thread_kmem",
234 .ckd_size = sizeof (struct echo_thread_info)
235 },
236 {
237 .ckd_cache = &echo_session_kmem,
238 .ckd_name = "echo_session_kmem",
239 .ckd_size = sizeof (struct echo_session_info)
240 },
241 #if 0
242 {
243 .ckd_cache = &echo_req_kmem,
244 .ckd_name = "echo_req_kmem",
245 .ckd_size = sizeof (struct echo_req)
246 },
247 #endif
248 {
249 .ckd_cache = NULL
250 }
251 };
252
253 /** \defgroup echo_page Page operations
254 *
255 * Echo page operations.
256 *
257 * @{
258 */
259 static struct page *echo_page_vmpage(const struct lu_env *env,
260 const struct cl_page_slice *slice)
261 {
262 return cl2echo_page(slice)->ep_vmpage;
263 }
264
265 static int echo_page_own(const struct lu_env *env,
266 const struct cl_page_slice *slice,
267 struct cl_io *io, int nonblock)
268 {
269 struct echo_page *ep = cl2echo_page(slice);
270
271 if (!nonblock)
272 mutex_lock(&ep->ep_lock);
273 else if (!mutex_trylock(&ep->ep_lock))
274 return -EAGAIN;
275 return 0;
276 }
277
278 static void echo_page_disown(const struct lu_env *env,
279 const struct cl_page_slice *slice,
280 struct cl_io *io)
281 {
282 struct echo_page *ep = cl2echo_page(slice);
283
284 LASSERT(mutex_is_locked(&ep->ep_lock));
285 mutex_unlock(&ep->ep_lock);
286 }
287
288 static void echo_page_discard(const struct lu_env *env,
289 const struct cl_page_slice *slice,
290 struct cl_io *unused)
291 {
292 cl_page_delete(env, slice->cpl_page);
293 }
294
295 static int echo_page_is_vmlocked(const struct lu_env *env,
296 const struct cl_page_slice *slice)
297 {
298 if (mutex_is_locked(&cl2echo_page(slice)->ep_lock))
299 return -EBUSY;
300 return -ENODATA;
301 }
302
303 static void echo_page_completion(const struct lu_env *env,
304 const struct cl_page_slice *slice,
305 int ioret)
306 {
307 LASSERT(slice->cpl_page->cp_sync_io != NULL);
308 }
309
310 static void echo_page_fini(const struct lu_env *env,
311 struct cl_page_slice *slice)
312 {
313 struct echo_page *ep = cl2echo_page(slice);
314 struct echo_object *eco = cl2echo_obj(slice->cpl_obj);
315 struct page *vmpage = ep->ep_vmpage;
316
317 atomic_dec(&eco->eo_npages);
318 page_cache_release(vmpage);
319 }
320
321 static int echo_page_prep(const struct lu_env *env,
322 const struct cl_page_slice *slice,
323 struct cl_io *unused)
324 {
325 return 0;
326 }
327
328 static int echo_page_print(const struct lu_env *env,
329 const struct cl_page_slice *slice,
330 void *cookie, lu_printer_t printer)
331 {
332 struct echo_page *ep = cl2echo_page(slice);
333
334 (*printer)(env, cookie, LUSTRE_ECHO_CLIENT_NAME"-page@%p %d vm@%p\n",
335 ep, mutex_is_locked(&ep->ep_lock), ep->ep_vmpage);
336 return 0;
337 }
338
339 static const struct cl_page_operations echo_page_ops = {
340 .cpo_own = echo_page_own,
341 .cpo_disown = echo_page_disown,
342 .cpo_discard = echo_page_discard,
343 .cpo_vmpage = echo_page_vmpage,
344 .cpo_fini = echo_page_fini,
345 .cpo_print = echo_page_print,
346 .cpo_is_vmlocked = echo_page_is_vmlocked,
347 .io = {
348 [CRT_READ] = {
349 .cpo_prep = echo_page_prep,
350 .cpo_completion = echo_page_completion,
351 },
352 [CRT_WRITE] = {
353 .cpo_prep = echo_page_prep,
354 .cpo_completion = echo_page_completion,
355 }
356 }
357 };
358 /** @} echo_page */
359
360 /** \defgroup echo_lock Locking
361 *
362 * echo lock operations
363 *
364 * @{
365 */
366 static void echo_lock_fini(const struct lu_env *env,
367 struct cl_lock_slice *slice)
368 {
369 struct echo_lock *ecl = cl2echo_lock(slice);
370
371 LASSERT(list_empty(&ecl->el_chain));
372 OBD_SLAB_FREE_PTR(ecl, echo_lock_kmem);
373 }
374
375 static void echo_lock_delete(const struct lu_env *env,
376 const struct cl_lock_slice *slice)
377 {
378 struct echo_lock *ecl = cl2echo_lock(slice);
379
380 LASSERT(list_empty(&ecl->el_chain));
381 }
382
383 static int echo_lock_fits_into(const struct lu_env *env,
384 const struct cl_lock_slice *slice,
385 const struct cl_lock_descr *need,
386 const struct cl_io *unused)
387 {
388 return 1;
389 }
390
391 static struct cl_lock_operations echo_lock_ops = {
392 .clo_fini = echo_lock_fini,
393 .clo_delete = echo_lock_delete,
394 .clo_fits_into = echo_lock_fits_into
395 };
396
397 /** @} echo_lock */
398
399 /** \defgroup echo_cl_ops cl_object operations
400 *
401 * operations for cl_object
402 *
403 * @{
404 */
405 static int echo_page_init(const struct lu_env *env, struct cl_object *obj,
406 struct cl_page *page, struct page *vmpage)
407 {
408 struct echo_page *ep = cl_object_page_slice(obj, page);
409 struct echo_object *eco = cl2echo_obj(obj);
410
411 ep->ep_vmpage = vmpage;
412 page_cache_get(vmpage);
413 mutex_init(&ep->ep_lock);
414 cl_page_slice_add(page, &ep->ep_cl, obj, &echo_page_ops);
415 atomic_inc(&eco->eo_npages);
416 return 0;
417 }
418
419 static int echo_io_init(const struct lu_env *env, struct cl_object *obj,
420 struct cl_io *io)
421 {
422 return 0;
423 }
424
425 static int echo_lock_init(const struct lu_env *env,
426 struct cl_object *obj, struct cl_lock *lock,
427 const struct cl_io *unused)
428 {
429 struct echo_lock *el;
430
431 OBD_SLAB_ALLOC_PTR_GFP(el, echo_lock_kmem, __GFP_IO);
432 if (el != NULL) {
433 cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops);
434 el->el_object = cl2echo_obj(obj);
435 INIT_LIST_HEAD(&el->el_chain);
436 atomic_set(&el->el_refcount, 0);
437 }
438 return el == NULL ? -ENOMEM : 0;
439 }
440
441 static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
442 const struct cl_object_conf *conf)
443 {
444 return 0;
445 }
446
447 static const struct cl_object_operations echo_cl_obj_ops = {
448 .coo_page_init = echo_page_init,
449 .coo_lock_init = echo_lock_init,
450 .coo_io_init = echo_io_init,
451 .coo_conf_set = echo_conf_set
452 };
453 /** @} echo_cl_ops */
454
455 /** \defgroup echo_lu_ops lu_object operations
456 *
457 * operations for echo lu object.
458 *
459 * @{
460 */
461 static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
462 const struct lu_object_conf *conf)
463 {
464 struct echo_device *ed = cl2echo_dev(lu2cl_dev(obj->lo_dev));
465 struct echo_client_obd *ec = ed->ed_ec;
466 struct echo_object *eco = cl2echo_obj(lu2cl(obj));
467
468 if (ed->ed_next) {
469 struct lu_object *below;
470 struct lu_device *under;
471
472 under = ed->ed_next;
473 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
474 under);
475 if (below == NULL)
476 return -ENOMEM;
477 lu_object_add(obj, below);
478 }
479
480 if (!ed->ed_next_ismd) {
481 const struct cl_object_conf *cconf = lu2cl_conf(conf);
482 struct echo_object_conf *econf = cl2echo_conf(cconf);
483
484 LASSERT(econf->eoc_md);
485 eco->eo_lsm = *econf->eoc_md;
486 /* clear the lsm pointer so that it won't get freed. */
487 *econf->eoc_md = NULL;
488 } else {
489 eco->eo_lsm = NULL;
490 }
491
492 eco->eo_dev = ed;
493 atomic_set(&eco->eo_npages, 0);
494 cl_object_page_init(lu2cl(obj), sizeof(struct echo_page));
495
496 spin_lock(&ec->ec_lock);
497 list_add_tail(&eco->eo_obj_chain, &ec->ec_objects);
498 spin_unlock(&ec->ec_lock);
499
500 return 0;
501 }
502
503 /* taken from osc_unpackmd() */
504 static int echo_alloc_memmd(struct echo_device *ed,
505 struct lov_stripe_md **lsmp)
506 {
507 int lsm_size;
508
509 /* If export is lov/osc then use their obd method */
510 if (ed->ed_next != NULL)
511 return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp);
512 /* OFD has no unpackmd method, do everything here */
513 lsm_size = lov_stripe_md_size(1);
514
515 LASSERT(*lsmp == NULL);
516 OBD_ALLOC(*lsmp, lsm_size);
517 if (*lsmp == NULL)
518 return -ENOMEM;
519
520 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
521 if ((*lsmp)->lsm_oinfo[0] == NULL) {
522 OBD_FREE(*lsmp, lsm_size);
523 return -ENOMEM;
524 }
525
526 loi_init((*lsmp)->lsm_oinfo[0]);
527 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
528 ostid_set_seq_echo(&(*lsmp)->lsm_oi);
529
530 return lsm_size;
531 }
532
533 static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp)
534 {
535 int lsm_size;
536
537 /* If export is lov/osc then use their obd method */
538 if (ed->ed_next != NULL)
539 return obd_free_memmd(ed->ed_ec->ec_exp, lsmp);
540 /* OFD has no unpackmd method, do everything here */
541 lsm_size = lov_stripe_md_size(1);
542
543 LASSERT(*lsmp != NULL);
544 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
545 OBD_FREE(*lsmp, lsm_size);
546 *lsmp = NULL;
547 return 0;
548 }
549
550 static void echo_object_free(const struct lu_env *env, struct lu_object *obj)
551 {
552 struct echo_object *eco = cl2echo_obj(lu2cl(obj));
553 struct echo_client_obd *ec = eco->eo_dev->ed_ec;
554
555 LASSERT(atomic_read(&eco->eo_npages) == 0);
556
557 spin_lock(&ec->ec_lock);
558 list_del_init(&eco->eo_obj_chain);
559 spin_unlock(&ec->ec_lock);
560
561 lu_object_fini(obj);
562 lu_object_header_fini(obj->lo_header);
563
564 if (eco->eo_lsm)
565 echo_free_memmd(eco->eo_dev, &eco->eo_lsm);
566 OBD_SLAB_FREE_PTR(eco, echo_object_kmem);
567 }
568
569 static int echo_object_print(const struct lu_env *env, void *cookie,
570 lu_printer_t p, const struct lu_object *o)
571 {
572 struct echo_object *obj = cl2echo_obj(lu2cl(o));
573
574 return (*p)(env, cookie, "echoclient-object@%p", obj);
575 }
576
577 static const struct lu_object_operations echo_lu_obj_ops = {
578 .loo_object_init = echo_object_init,
579 .loo_object_delete = NULL,
580 .loo_object_release = NULL,
581 .loo_object_free = echo_object_free,
582 .loo_object_print = echo_object_print,
583 .loo_object_invariant = NULL
584 };
585 /** @} echo_lu_ops */
586
587 /** \defgroup echo_lu_dev_ops lu_device operations
588 *
589 * Operations for echo lu device.
590 *
591 * @{
592 */
593 static struct lu_object *echo_object_alloc(const struct lu_env *env,
594 const struct lu_object_header *hdr,
595 struct lu_device *dev)
596 {
597 struct echo_object *eco;
598 struct lu_object *obj = NULL;
599
600 /* we're the top dev. */
601 LASSERT(hdr == NULL);
602 OBD_SLAB_ALLOC_PTR_GFP(eco, echo_object_kmem, __GFP_IO);
603 if (eco != NULL) {
604 struct cl_object_header *hdr = &eco->eo_hdr;
605
606 obj = &echo_obj2cl(eco)->co_lu;
607 cl_object_header_init(hdr);
608 lu_object_init(obj, &hdr->coh_lu, dev);
609 lu_object_add_top(&hdr->coh_lu, obj);
610
611 eco->eo_cl.co_ops = &echo_cl_obj_ops;
612 obj->lo_ops = &echo_lu_obj_ops;
613 }
614 return obj;
615 }
616
617 static struct lu_device_operations echo_device_lu_ops = {
618 .ldo_object_alloc = echo_object_alloc,
619 };
620
621 /** @} echo_lu_dev_ops */
622
623 static struct cl_device_operations echo_device_cl_ops = {
624 };
625
626 /** \defgroup echo_init Setup and teardown
627 *
628 * Init and fini functions for echo client.
629 *
630 * @{
631 */
632 static int echo_site_init(const struct lu_env *env, struct echo_device *ed)
633 {
634 struct cl_site *site = &ed->ed_site_myself;
635 int rc;
636
637 /* initialize site */
638 rc = cl_site_init(site, &ed->ed_cl);
639 if (rc) {
640 CERROR("Cannot initialize site for echo client(%d)\n", rc);
641 return rc;
642 }
643
644 rc = lu_site_init_finish(&site->cs_lu);
645 if (rc)
646 return rc;
647
648 ed->ed_site = site;
649 return 0;
650 }
651
652 static void echo_site_fini(const struct lu_env *env, struct echo_device *ed)
653 {
654 if (ed->ed_site) {
655 if (!ed->ed_next_ismd)
656 cl_site_fini(ed->ed_site);
657 ed->ed_site = NULL;
658 }
659 }
660
661 static void *echo_thread_key_init(const struct lu_context *ctx,
662 struct lu_context_key *key)
663 {
664 struct echo_thread_info *info;
665
666 OBD_SLAB_ALLOC_PTR_GFP(info, echo_thread_kmem, __GFP_IO);
667 if (info == NULL)
668 info = ERR_PTR(-ENOMEM);
669 return info;
670 }
671
672 static void echo_thread_key_fini(const struct lu_context *ctx,
673 struct lu_context_key *key, void *data)
674 {
675 struct echo_thread_info *info = data;
676 OBD_SLAB_FREE_PTR(info, echo_thread_kmem);
677 }
678
679 static void echo_thread_key_exit(const struct lu_context *ctx,
680 struct lu_context_key *key, void *data)
681 {
682 }
683
684 static struct lu_context_key echo_thread_key = {
685 .lct_tags = LCT_CL_THREAD,
686 .lct_init = echo_thread_key_init,
687 .lct_fini = echo_thread_key_fini,
688 .lct_exit = echo_thread_key_exit
689 };
690
691 static void *echo_session_key_init(const struct lu_context *ctx,
692 struct lu_context_key *key)
693 {
694 struct echo_session_info *session;
695
696 OBD_SLAB_ALLOC_PTR_GFP(session, echo_session_kmem, __GFP_IO);
697 if (session == NULL)
698 session = ERR_PTR(-ENOMEM);
699 return session;
700 }
701
702 static void echo_session_key_fini(const struct lu_context *ctx,
703 struct lu_context_key *key, void *data)
704 {
705 struct echo_session_info *session = data;
706 OBD_SLAB_FREE_PTR(session, echo_session_kmem);
707 }
708
709 static void echo_session_key_exit(const struct lu_context *ctx,
710 struct lu_context_key *key, void *data)
711 {
712 }
713
714 static struct lu_context_key echo_session_key = {
715 .lct_tags = LCT_SESSION,
716 .lct_init = echo_session_key_init,
717 .lct_fini = echo_session_key_fini,
718 .lct_exit = echo_session_key_exit
719 };
720
721 LU_TYPE_INIT_FINI(echo, &echo_thread_key, &echo_session_key);
722
723 #define ECHO_SEQ_WIDTH 0xffffffff
724 static int echo_fid_init(struct echo_device *ed, char *obd_name,
725 struct seq_server_site *ss)
726 {
727 char *prefix;
728 int rc;
729
730 OBD_ALLOC_PTR(ed->ed_cl_seq);
731 if (ed->ed_cl_seq == NULL)
732 return -ENOMEM;
733
734 OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
735 if (prefix == NULL)
736 GOTO(out_free_seq, rc = -ENOMEM);
737
738 snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s", obd_name);
739
740 /* Init client side sequence-manager */
741 rc = seq_client_init(ed->ed_cl_seq, NULL,
742 LUSTRE_SEQ_METADATA,
743 prefix, ss->ss_server_seq);
744 ed->ed_cl_seq->lcs_width = ECHO_SEQ_WIDTH;
745 OBD_FREE(prefix, MAX_OBD_NAME + 5);
746 if (rc)
747 GOTO(out_free_seq, rc);
748
749 return 0;
750
751 out_free_seq:
752 OBD_FREE_PTR(ed->ed_cl_seq);
753 ed->ed_cl_seq = NULL;
754 return rc;
755 }
756
757 static int echo_fid_fini(struct obd_device *obddev)
758 {
759 struct echo_device *ed = obd2echo_dev(obddev);
760
761 if (ed->ed_cl_seq != NULL) {
762 seq_client_fini(ed->ed_cl_seq);
763 OBD_FREE_PTR(ed->ed_cl_seq);
764 ed->ed_cl_seq = NULL;
765 }
766
767 return 0;
768 }
769
770 static struct lu_device *echo_device_alloc(const struct lu_env *env,
771 struct lu_device_type *t,
772 struct lustre_cfg *cfg)
773 {
774 struct lu_device *next;
775 struct echo_device *ed;
776 struct cl_device *cd;
777 struct obd_device *obd = NULL; /* to keep compiler happy */
778 struct obd_device *tgt;
779 const char *tgt_type_name;
780 int rc;
781 int cleanup = 0;
782
783 OBD_ALLOC_PTR(ed);
784 if (ed == NULL)
785 GOTO(out, rc = -ENOMEM);
786
787 cleanup = 1;
788 cd = &ed->ed_cl;
789 rc = cl_device_init(cd, t);
790 if (rc)
791 GOTO(out, rc);
792
793 cd->cd_lu_dev.ld_ops = &echo_device_lu_ops;
794 cd->cd_ops = &echo_device_cl_ops;
795
796 cleanup = 2;
797 obd = class_name2obd(lustre_cfg_string(cfg, 0));
798 LASSERT(obd != NULL);
799 LASSERT(env != NULL);
800
801 tgt = class_name2obd(lustre_cfg_string(cfg, 1));
802 if (tgt == NULL) {
803 CERROR("Can not find tgt device %s\n",
804 lustre_cfg_string(cfg, 1));
805 GOTO(out, rc = -ENODEV);
806 }
807
808 next = tgt->obd_lu_dev;
809 if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) {
810 ed->ed_next_ismd = 1;
811 } else {
812 ed->ed_next_ismd = 0;
813 rc = echo_site_init(env, ed);
814 if (rc)
815 GOTO(out, rc);
816 }
817 cleanup = 3;
818
819 rc = echo_client_setup(env, obd, cfg);
820 if (rc)
821 GOTO(out, rc);
822
823 ed->ed_ec = &obd->u.echo_client;
824 cleanup = 4;
825
826 if (ed->ed_next_ismd) {
827 /* Suppose to connect to some Metadata layer */
828 struct lu_site *ls;
829 struct lu_device *ld;
830 int found = 0;
831
832 if (next == NULL) {
833 CERROR("%s is not lu device type!\n",
834 lustre_cfg_string(cfg, 1));
835 GOTO(out, rc = -EINVAL);
836 }
837
838 tgt_type_name = lustre_cfg_string(cfg, 2);
839 if (!tgt_type_name) {
840 CERROR("%s no type name for echo %s setup\n",
841 lustre_cfg_string(cfg, 1),
842 tgt->obd_type->typ_name);
843 GOTO(out, rc = -EINVAL);
844 }
845
846 ls = next->ld_site;
847
848 spin_lock(&ls->ls_ld_lock);
849 list_for_each_entry(ld, &ls->ls_ld_linkage, ld_linkage) {
850 if (strcmp(ld->ld_type->ldt_name, tgt_type_name) == 0) {
851 found = 1;
852 break;
853 }
854 }
855 spin_unlock(&ls->ls_ld_lock);
856
857 if (found == 0) {
858 CERROR("%s is not lu device type!\n",
859 lustre_cfg_string(cfg, 1));
860 GOTO(out, rc = -EINVAL);
861 }
862
863 next = ld;
864 /* For MD echo client, it will use the site in MDS stack */
865 ed->ed_site_myself.cs_lu = *ls;
866 ed->ed_site = &ed->ed_site_myself;
867 ed->ed_cl.cd_lu_dev.ld_site = &ed->ed_site_myself.cs_lu;
868 rc = echo_fid_init(ed, obd->obd_name, lu_site2seq(ls));
869 if (rc) {
870 CERROR("echo fid init error %d\n", rc);
871 GOTO(out, rc);
872 }
873 } else {
874 /* if echo client is to be stacked upon ost device, the next is
875 * NULL since ost is not a clio device so far */
876 if (next != NULL && !lu_device_is_cl(next))
877 next = NULL;
878
879 tgt_type_name = tgt->obd_type->typ_name;
880 if (next != NULL) {
881 LASSERT(next != NULL);
882 if (next->ld_site != NULL)
883 GOTO(out, rc = -EBUSY);
884
885 next->ld_site = &ed->ed_site->cs_lu;
886 rc = next->ld_type->ldt_ops->ldto_device_init(env, next,
887 next->ld_type->ldt_name,
888 NULL);
889 if (rc)
890 GOTO(out, rc);
891
892 /* Tricky case, I have to determine the obd type since
893 * CLIO uses the different parameters to initialize
894 * objects for lov & osc. */
895 if (strcmp(tgt_type_name, LUSTRE_LOV_NAME) == 0)
896 ed->ed_next_islov = 1;
897 else
898 LASSERT(strcmp(tgt_type_name,
899 LUSTRE_OSC_NAME) == 0);
900 } else
901 LASSERT(strcmp(tgt_type_name, LUSTRE_OST_NAME) == 0);
902 }
903
904 ed->ed_next = next;
905 return &cd->cd_lu_dev;
906 out:
907 switch(cleanup) {
908 case 4: {
909 int rc2;
910 rc2 = echo_client_cleanup(obd);
911 if (rc2)
912 CERROR("Cleanup obd device %s error(%d)\n",
913 obd->obd_name, rc2);
914 }
915
916 case 3:
917 echo_site_fini(env, ed);
918 case 2:
919 cl_device_fini(&ed->ed_cl);
920 case 1:
921 OBD_FREE_PTR(ed);
922 case 0:
923 default:
924 break;
925 }
926 return(ERR_PTR(rc));
927 }
928
929 static int echo_device_init(const struct lu_env *env, struct lu_device *d,
930 const char *name, struct lu_device *next)
931 {
932 LBUG();
933 return 0;
934 }
935
936 static struct lu_device *echo_device_fini(const struct lu_env *env,
937 struct lu_device *d)
938 {
939 struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
940 struct lu_device *next = ed->ed_next;
941
942 while (next && !ed->ed_next_ismd)
943 next = next->ld_type->ldt_ops->ldto_device_fini(env, next);
944 return NULL;
945 }
946
947 static void echo_lock_release(const struct lu_env *env,
948 struct echo_lock *ecl,
949 int still_used)
950 {
951 struct cl_lock *clk = echo_lock2cl(ecl);
952
953 cl_lock_get(clk);
954 cl_unuse(env, clk);
955 cl_lock_release(env, clk, "ec enqueue", ecl->el_object);
956 if (!still_used) {
957 cl_lock_mutex_get(env, clk);
958 cl_lock_cancel(env, clk);
959 cl_lock_delete(env, clk);
960 cl_lock_mutex_put(env, clk);
961 }
962 cl_lock_put(env, clk);
963 }
964
965 static struct lu_device *echo_device_free(const struct lu_env *env,
966 struct lu_device *d)
967 {
968 struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
969 struct echo_client_obd *ec = ed->ed_ec;
970 struct echo_object *eco;
971 struct lu_device *next = ed->ed_next;
972
973 CDEBUG(D_INFO, "echo device:%p is going to be freed, next = %p\n",
974 ed, next);
975
976 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
977
978 /* check if there are objects still alive.
979 * It shouldn't have any object because lu_site_purge would cleanup
980 * all of cached objects. Anyway, probably the echo device is being
981 * parallelly accessed.
982 */
983 spin_lock(&ec->ec_lock);
984 list_for_each_entry(eco, &ec->ec_objects, eo_obj_chain)
985 eco->eo_deleted = 1;
986 spin_unlock(&ec->ec_lock);
987
988 /* purge again */
989 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
990
991 CDEBUG(D_INFO,
992 "Waiting for the reference of echo object to be dropped\n");
993
994 /* Wait for the last reference to be dropped. */
995 spin_lock(&ec->ec_lock);
996 while (!list_empty(&ec->ec_objects)) {
997 spin_unlock(&ec->ec_lock);
998 CERROR("echo_client still has objects at cleanup time, "
999 "wait for 1 second\n");
1000 schedule_timeout_and_set_state(TASK_UNINTERRUPTIBLE,
1001 cfs_time_seconds(1));
1002 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
1003 spin_lock(&ec->ec_lock);
1004 }
1005 spin_unlock(&ec->ec_lock);
1006
1007 LASSERT(list_empty(&ec->ec_locks));
1008
1009 CDEBUG(D_INFO, "No object exists, exiting...\n");
1010
1011 echo_client_cleanup(d->ld_obd);
1012 echo_fid_fini(d->ld_obd);
1013 while (next && !ed->ed_next_ismd)
1014 next = next->ld_type->ldt_ops->ldto_device_free(env, next);
1015
1016 LASSERT(ed->ed_site == lu2cl_site(d->ld_site));
1017 echo_site_fini(env, ed);
1018 cl_device_fini(&ed->ed_cl);
1019 OBD_FREE_PTR(ed);
1020
1021 return NULL;
1022 }
1023
1024 static const struct lu_device_type_operations echo_device_type_ops = {
1025 .ldto_init = echo_type_init,
1026 .ldto_fini = echo_type_fini,
1027
1028 .ldto_start = echo_type_start,
1029 .ldto_stop = echo_type_stop,
1030
1031 .ldto_device_alloc = echo_device_alloc,
1032 .ldto_device_free = echo_device_free,
1033 .ldto_device_init = echo_device_init,
1034 .ldto_device_fini = echo_device_fini
1035 };
1036
1037 static struct lu_device_type echo_device_type = {
1038 .ldt_tags = LU_DEVICE_CL,
1039 .ldt_name = LUSTRE_ECHO_CLIENT_NAME,
1040 .ldt_ops = &echo_device_type_ops,
1041 .ldt_ctx_tags = LCT_CL_THREAD | LCT_MD_THREAD | LCT_DT_THREAD,
1042 };
1043 /** @} echo_init */
1044
1045 /** \defgroup echo_exports Exported operations
1046 *
1047 * exporting functions to echo client
1048 *
1049 * @{
1050 */
1051
1052 /* Interfaces to echo client obd device */
1053 static struct echo_object *cl_echo_object_find(struct echo_device *d,
1054 struct lov_stripe_md **lsmp)
1055 {
1056 struct lu_env *env;
1057 struct echo_thread_info *info;
1058 struct echo_object_conf *conf;
1059 struct lov_stripe_md *lsm;
1060 struct echo_object *eco;
1061 struct cl_object *obj;
1062 struct lu_fid *fid;
1063 int refcheck;
1064 int rc;
1065
1066 LASSERT(lsmp);
1067 lsm = *lsmp;
1068 LASSERT(lsm);
1069 LASSERTF(ostid_id(&lsm->lsm_oi) != 0, DOSTID"\n", POSTID(&lsm->lsm_oi));
1070 LASSERTF(ostid_seq(&lsm->lsm_oi) == FID_SEQ_ECHO, DOSTID"\n",
1071 POSTID(&lsm->lsm_oi));
1072
1073 /* Never return an object if the obd is to be freed. */
1074 if (echo_dev2cl(d)->cd_lu_dev.ld_obd->obd_stopping)
1075 return ERR_PTR(-ENODEV);
1076
1077 env = cl_env_get(&refcheck);
1078 if (IS_ERR(env))
1079 return (void *)env;
1080
1081 info = echo_env_info(env);
1082 conf = &info->eti_conf;
1083 if (d->ed_next) {
1084 if (!d->ed_next_islov) {
1085 struct lov_oinfo *oinfo = lsm->lsm_oinfo[0];
1086 LASSERT(oinfo != NULL);
1087 oinfo->loi_oi = lsm->lsm_oi;
1088 conf->eoc_cl.u.coc_oinfo = oinfo;
1089 } else {
1090 struct lustre_md *md;
1091 md = &info->eti_md;
1092 memset(md, 0, sizeof(*md));
1093 md->lsm = lsm;
1094 conf->eoc_cl.u.coc_md = md;
1095 }
1096 }
1097 conf->eoc_md = lsmp;
1098
1099 fid = &info->eti_fid;
1100 rc = ostid_to_fid(fid, &lsm->lsm_oi, 0);
1101 if (rc != 0)
1102 GOTO(out, eco = ERR_PTR(rc));
1103
1104 /* In the function below, .hs_keycmp resolves to
1105 * lu_obj_hop_keycmp() */
1106 /* coverity[overrun-buffer-val] */
1107 obj = cl_object_find(env, echo_dev2cl(d), fid, &conf->eoc_cl);
1108 if (IS_ERR(obj))
1109 GOTO(out, eco = (void *)obj);
1110
1111 eco = cl2echo_obj(obj);
1112 if (eco->eo_deleted) {
1113 cl_object_put(env, obj);
1114 eco = ERR_PTR(-EAGAIN);
1115 }
1116
1117 out:
1118 cl_env_put(env, &refcheck);
1119 return eco;
1120 }
1121
1122 static int cl_echo_object_put(struct echo_object *eco)
1123 {
1124 struct lu_env *env;
1125 struct cl_object *obj = echo_obj2cl(eco);
1126 int refcheck;
1127
1128 env = cl_env_get(&refcheck);
1129 if (IS_ERR(env))
1130 return PTR_ERR(env);
1131
1132 /* an external function to kill an object? */
1133 if (eco->eo_deleted) {
1134 struct lu_object_header *loh = obj->co_lu.lo_header;
1135 LASSERT(&eco->eo_hdr == luh2coh(loh));
1136 set_bit(LU_OBJECT_HEARD_BANSHEE, &loh->loh_flags);
1137 }
1138
1139 cl_object_put(env, obj);
1140 cl_env_put(env, &refcheck);
1141 return 0;
1142 }
1143
1144 static int cl_echo_enqueue0(struct lu_env *env, struct echo_object *eco,
1145 obd_off start, obd_off end, int mode,
1146 __u64 *cookie , __u32 enqflags)
1147 {
1148 struct cl_io *io;
1149 struct cl_lock *lck;
1150 struct cl_object *obj;
1151 struct cl_lock_descr *descr;
1152 struct echo_thread_info *info;
1153 int rc = -ENOMEM;
1154
1155 info = echo_env_info(env);
1156 io = &info->eti_io;
1157 descr = &info->eti_descr;
1158 obj = echo_obj2cl(eco);
1159
1160 descr->cld_obj = obj;
1161 descr->cld_start = cl_index(obj, start);
1162 descr->cld_end = cl_index(obj, end);
1163 descr->cld_mode = mode == LCK_PW ? CLM_WRITE : CLM_READ;
1164 descr->cld_enq_flags = enqflags;
1165 io->ci_obj = obj;
1166
1167 lck = cl_lock_request(env, io, descr, "ec enqueue", eco);
1168 if (lck) {
1169 struct echo_client_obd *ec = eco->eo_dev->ed_ec;
1170 struct echo_lock *el;
1171
1172 rc = cl_wait(env, lck);
1173 if (rc == 0) {
1174 el = cl2echo_lock(cl_lock_at(lck, &echo_device_type));
1175 spin_lock(&ec->ec_lock);
1176 if (list_empty(&el->el_chain)) {
1177 list_add(&el->el_chain, &ec->ec_locks);
1178 el->el_cookie = ++ec->ec_unique;
1179 }
1180 atomic_inc(&el->el_refcount);
1181 *cookie = el->el_cookie;
1182 spin_unlock(&ec->ec_lock);
1183 } else {
1184 cl_lock_release(env, lck, "ec enqueue", current);
1185 }
1186 }
1187 return rc;
1188 }
1189
1190 static int cl_echo_enqueue(struct echo_object *eco, obd_off start, obd_off end,
1191 int mode, __u64 *cookie)
1192 {
1193 struct echo_thread_info *info;
1194 struct lu_env *env;
1195 struct cl_io *io;
1196 int refcheck;
1197 int result;
1198
1199 env = cl_env_get(&refcheck);
1200 if (IS_ERR(env))
1201 return PTR_ERR(env);
1202
1203 info = echo_env_info(env);
1204 io = &info->eti_io;
1205
1206 io->ci_ignore_layout = 1;
1207 result = cl_io_init(env, io, CIT_MISC, echo_obj2cl(eco));
1208 if (result < 0)
1209 GOTO(out, result);
1210 LASSERT(result == 0);
1211
1212 result = cl_echo_enqueue0(env, eco, start, end, mode, cookie, 0);
1213 cl_io_fini(env, io);
1214
1215 out:
1216 cl_env_put(env, &refcheck);
1217 return result;
1218 }
1219
1220 static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed,
1221 __u64 cookie)
1222 {
1223 struct echo_client_obd *ec = ed->ed_ec;
1224 struct echo_lock *ecl = NULL;
1225 struct list_head *el;
1226 int found = 0, still_used = 0;
1227
1228 LASSERT(ec != NULL);
1229 spin_lock(&ec->ec_lock);
1230 list_for_each (el, &ec->ec_locks) {
1231 ecl = list_entry (el, struct echo_lock, el_chain);
1232 CDEBUG(D_INFO, "ecl: %p, cookie: "LPX64"\n", ecl, ecl->el_cookie);
1233 found = (ecl->el_cookie == cookie);
1234 if (found) {
1235 if (atomic_dec_and_test(&ecl->el_refcount))
1236 list_del_init(&ecl->el_chain);
1237 else
1238 still_used = 1;
1239 break;
1240 }
1241 }
1242 spin_unlock(&ec->ec_lock);
1243
1244 if (!found)
1245 return -ENOENT;
1246
1247 echo_lock_release(env, ecl, still_used);
1248 return 0;
1249 }
1250
1251 static int cl_echo_cancel(struct echo_device *ed, __u64 cookie)
1252 {
1253 struct lu_env *env;
1254 int refcheck;
1255 int rc;
1256
1257 env = cl_env_get(&refcheck);
1258 if (IS_ERR(env))
1259 return PTR_ERR(env);
1260
1261 rc = cl_echo_cancel0(env, ed, cookie);
1262
1263 cl_env_put(env, &refcheck);
1264 return rc;
1265 }
1266
1267 static int cl_echo_async_brw(const struct lu_env *env, struct cl_io *io,
1268 enum cl_req_type unused, struct cl_2queue *queue)
1269 {
1270 struct cl_page *clp;
1271 struct cl_page *temp;
1272 int result = 0;
1273
1274 cl_page_list_for_each_safe(clp, temp, &queue->c2_qin) {
1275 int rc;
1276 rc = cl_page_cache_add(env, io, clp, CRT_WRITE);
1277 if (rc == 0)
1278 continue;
1279 result = result ?: rc;
1280 }
1281 return result;
1282 }
1283
1284 static int cl_echo_object_brw(struct echo_object *eco, int rw, obd_off offset,
1285 struct page **pages, int npages, int async)
1286 {
1287 struct lu_env *env;
1288 struct echo_thread_info *info;
1289 struct cl_object *obj = echo_obj2cl(eco);
1290 struct echo_device *ed = eco->eo_dev;
1291 struct cl_2queue *queue;
1292 struct cl_io *io;
1293 struct cl_page *clp;
1294 struct lustre_handle lh = { 0 };
1295 int page_size = cl_page_size(obj);
1296 int refcheck;
1297 int rc;
1298 int i;
1299
1300 LASSERT((offset & ~CFS_PAGE_MASK) == 0);
1301 LASSERT(ed->ed_next != NULL);
1302 env = cl_env_get(&refcheck);
1303 if (IS_ERR(env))
1304 return PTR_ERR(env);
1305
1306 info = echo_env_info(env);
1307 io = &info->eti_io;
1308 queue = &info->eti_queue;
1309
1310 cl_2queue_init(queue);
1311
1312 io->ci_ignore_layout = 1;
1313 rc = cl_io_init(env, io, CIT_MISC, obj);
1314 if (rc < 0)
1315 GOTO(out, rc);
1316 LASSERT(rc == 0);
1317
1318
1319 rc = cl_echo_enqueue0(env, eco, offset,
1320 offset + npages * PAGE_CACHE_SIZE - 1,
1321 rw == READ ? LCK_PR : LCK_PW, &lh.cookie,
1322 CEF_NEVER);
1323 if (rc < 0)
1324 GOTO(error_lock, rc);
1325
1326 for (i = 0; i < npages; i++) {
1327 LASSERT(pages[i]);
1328 clp = cl_page_find(env, obj, cl_index(obj, offset),
1329 pages[i], CPT_TRANSIENT);
1330 if (IS_ERR(clp)) {
1331 rc = PTR_ERR(clp);
1332 break;
1333 }
1334 LASSERT(clp->cp_type == CPT_TRANSIENT);
1335
1336 rc = cl_page_own(env, io, clp);
1337 if (rc) {
1338 LASSERT(clp->cp_state == CPS_FREEING);
1339 cl_page_put(env, clp);
1340 break;
1341 }
1342
1343 cl_2queue_add(queue, clp);
1344
1345 /* drop the reference count for cl_page_find, so that the page
1346 * will be freed in cl_2queue_fini. */
1347 cl_page_put(env, clp);
1348 cl_page_clip(env, clp, 0, page_size);
1349
1350 offset += page_size;
1351 }
1352
1353 if (rc == 0) {
1354 enum cl_req_type typ = rw == READ ? CRT_READ : CRT_WRITE;
1355
1356 async = async && (typ == CRT_WRITE);
1357 if (async)
1358 rc = cl_echo_async_brw(env, io, typ, queue);
1359 else
1360 rc = cl_io_submit_sync(env, io, typ, queue, 0);
1361 CDEBUG(D_INFO, "echo_client %s write returns %d\n",
1362 async ? "async" : "sync", rc);
1363 }
1364
1365 cl_echo_cancel0(env, ed, lh.cookie);
1366 error_lock:
1367 cl_2queue_discard(env, io, queue);
1368 cl_2queue_disown(env, io, queue);
1369 cl_2queue_fini(env, queue);
1370 cl_io_fini(env, io);
1371 out:
1372 cl_env_put(env, &refcheck);
1373 return rc;
1374 }
1375 /** @} echo_exports */
1376
1377
1378 static obd_id last_object_id;
1379
1380 static int
1381 echo_copyout_lsm (struct lov_stripe_md *lsm, void *_ulsm, int ulsm_nob)
1382 {
1383 struct lov_stripe_md *ulsm = _ulsm;
1384 int nob, i;
1385
1386 nob = offsetof (struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]);
1387 if (nob > ulsm_nob)
1388 return (-EINVAL);
1389
1390 if (copy_to_user (ulsm, lsm, sizeof(*ulsm)))
1391 return (-EFAULT);
1392
1393 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1394 if (copy_to_user (ulsm->lsm_oinfo[i], lsm->lsm_oinfo[i],
1395 sizeof(lsm->lsm_oinfo[0])))
1396 return (-EFAULT);
1397 }
1398 return 0;
1399 }
1400
1401 static int
1402 echo_copyin_lsm (struct echo_device *ed, struct lov_stripe_md *lsm,
1403 void *ulsm, int ulsm_nob)
1404 {
1405 struct echo_client_obd *ec = ed->ed_ec;
1406 int i;
1407
1408 if (ulsm_nob < sizeof (*lsm))
1409 return (-EINVAL);
1410
1411 if (copy_from_user (lsm, ulsm, sizeof (*lsm)))
1412 return (-EFAULT);
1413
1414 if (lsm->lsm_stripe_count > ec->ec_nstripes ||
1415 lsm->lsm_magic != LOV_MAGIC ||
1416 (lsm->lsm_stripe_size & (~CFS_PAGE_MASK)) != 0 ||
1417 ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL))
1418 return (-EINVAL);
1419
1420
1421 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1422 if (copy_from_user(lsm->lsm_oinfo[i],
1423 ((struct lov_stripe_md *)ulsm)-> \
1424 lsm_oinfo[i],
1425 sizeof(lsm->lsm_oinfo[0])))
1426 return (-EFAULT);
1427 }
1428 return (0);
1429 }
1430
1431 static inline void echo_md_build_name(struct lu_name *lname, char *name,
1432 __u64 id)
1433 {
1434 sprintf(name, LPU64, id);
1435 lname->ln_name = name;
1436 lname->ln_namelen = strlen(name);
1437 }
1438
1439 /* similar to mdt_attr_get_complex */
1440 static int echo_big_lmm_get(const struct lu_env *env, struct md_object *o,
1441 struct md_attr *ma)
1442 {
1443 struct echo_thread_info *info = echo_env_info(env);
1444 int rc;
1445
1446 LASSERT(ma->ma_lmm_size > 0);
1447
1448 rc = mo_xattr_get(env, o, &LU_BUF_NULL, XATTR_NAME_LOV);
1449 if (rc < 0)
1450 return rc;
1451
1452 /* big_lmm may need to be grown */
1453 if (info->eti_big_lmmsize < rc) {
1454 int size = size_roundup_power2(rc);
1455
1456 if (info->eti_big_lmmsize > 0) {
1457 /* free old buffer */
1458 LASSERT(info->eti_big_lmm);
1459 OBD_FREE_LARGE(info->eti_big_lmm,
1460 info->eti_big_lmmsize);
1461 info->eti_big_lmm = NULL;
1462 info->eti_big_lmmsize = 0;
1463 }
1464
1465 OBD_ALLOC_LARGE(info->eti_big_lmm, size);
1466 if (info->eti_big_lmm == NULL)
1467 return -ENOMEM;
1468 info->eti_big_lmmsize = size;
1469 }
1470 LASSERT(info->eti_big_lmmsize >= rc);
1471
1472 info->eti_buf.lb_buf = info->eti_big_lmm;
1473 info->eti_buf.lb_len = info->eti_big_lmmsize;
1474 rc = mo_xattr_get(env, o, &info->eti_buf, XATTR_NAME_LOV);
1475 if (rc < 0)
1476 return rc;
1477
1478 ma->ma_valid |= MA_LOV;
1479 ma->ma_lmm = info->eti_big_lmm;
1480 ma->ma_lmm_size = rc;
1481
1482 return 0;
1483 }
1484
1485 int echo_attr_get_complex(const struct lu_env *env, struct md_object *next,
1486 struct md_attr *ma)
1487 {
1488 struct echo_thread_info *info = echo_env_info(env);
1489 struct lu_buf *buf = &info->eti_buf;
1490 umode_t mode = lu_object_attr(&next->mo_lu);
1491 int need = ma->ma_need;
1492 int rc = 0, rc2;
1493
1494 ma->ma_valid = 0;
1495
1496 if (need & MA_INODE) {
1497 ma->ma_need = MA_INODE;
1498 rc = mo_attr_get(env, next, ma);
1499 if (rc)
1500 GOTO(out, rc);
1501 ma->ma_valid |= MA_INODE;
1502 }
1503
1504 if (need & MA_LOV) {
1505 if (S_ISREG(mode) || S_ISDIR(mode)) {
1506 LASSERT(ma->ma_lmm_size > 0);
1507 buf->lb_buf = ma->ma_lmm;
1508 buf->lb_len = ma->ma_lmm_size;
1509 rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_LOV);
1510 if (rc2 > 0) {
1511 ma->ma_lmm_size = rc2;
1512 ma->ma_valid |= MA_LOV;
1513 } else if (rc2 == -ENODATA) {
1514 /* no LOV EA */
1515 ma->ma_lmm_size = 0;
1516 } else if (rc2 == -ERANGE) {
1517 rc2 = echo_big_lmm_get(env, next, ma);
1518 if (rc2 < 0)
1519 GOTO(out, rc = rc2);
1520 } else {
1521 GOTO(out, rc = rc2);
1522 }
1523 }
1524 }
1525
1526 #ifdef CONFIG_FS_POSIX_ACL
1527 if (need & MA_ACL_DEF && S_ISDIR(mode)) {
1528 buf->lb_buf = ma->ma_acl;
1529 buf->lb_len = ma->ma_acl_size;
1530 rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_DEFAULT);
1531 if (rc2 > 0) {
1532 ma->ma_acl_size = rc2;
1533 ma->ma_valid |= MA_ACL_DEF;
1534 } else if (rc2 == -ENODATA) {
1535 /* no ACLs */
1536 ma->ma_acl_size = 0;
1537 } else {
1538 GOTO(out, rc = rc2);
1539 }
1540 }
1541 #endif
1542 out:
1543 ma->ma_need = need;
1544 CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = "LPX64" ma_lmm=%p\n",
1545 rc, ma->ma_valid, ma->ma_lmm);
1546 return rc;
1547 }
1548
1549 static int
1550 echo_md_create_internal(const struct lu_env *env, struct echo_device *ed,
1551 struct md_object *parent, struct lu_fid *fid,
1552 struct lu_name *lname, struct md_op_spec *spec,
1553 struct md_attr *ma)
1554 {
1555 struct lu_object *ec_child, *child;
1556 struct lu_device *ld = ed->ed_next;
1557 struct echo_thread_info *info = echo_env_info(env);
1558 struct lu_fid *fid2 = &info->eti_fid2;
1559 struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
1560 int rc;
1561
1562 rc = mdo_lookup(env, parent, lname, fid2, spec);
1563 if (rc == 0)
1564 return -EEXIST;
1565 else if (rc != -ENOENT)
1566 return rc;
1567
1568 ec_child = lu_object_find_at(env, &ed->ed_cl.cd_lu_dev,
1569 fid, &conf);
1570 if (IS_ERR(ec_child)) {
1571 CERROR("Can not find the child "DFID": rc = %ld\n", PFID(fid),
1572 PTR_ERR(ec_child));
1573 return PTR_ERR(ec_child);
1574 }
1575
1576 child = lu_object_locate(ec_child->lo_header, ld->ld_type);
1577 if (child == NULL) {
1578 CERROR("Can not locate the child "DFID"\n", PFID(fid));
1579 GOTO(out_put, rc = -EINVAL);
1580 }
1581
1582 CDEBUG(D_RPCTRACE, "Start creating object "DFID" %s %p\n",
1583 PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent);
1584
1585 /*
1586 * Do not perform lookup sanity check. We know that name does not exist.
1587 */
1588 spec->sp_cr_lookup = 0;
1589 rc = mdo_create(env, parent, lname, lu2md(child), spec, ma);
1590 if (rc) {
1591 CERROR("Can not create child "DFID": rc = %d\n", PFID(fid), rc);
1592 GOTO(out_put, rc);
1593 }
1594 CDEBUG(D_RPCTRACE, "End creating object "DFID" %s %p rc = %d\n",
1595 PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent, rc);
1596 out_put:
1597 lu_object_put(env, ec_child);
1598 return rc;
1599 }
1600
1601 static int echo_set_lmm_size(const struct lu_env *env, struct lu_device *ld,
1602 struct md_attr *ma)
1603 {
1604 struct echo_thread_info *info = echo_env_info(env);
1605
1606 if (strcmp(ld->ld_type->ldt_name, LUSTRE_MDD_NAME)) {
1607 ma->ma_lmm = (void *)&info->eti_lmm;
1608 ma->ma_lmm_size = sizeof(info->eti_lmm);
1609 } else {
1610 LASSERT(info->eti_big_lmmsize);
1611 ma->ma_lmm = info->eti_big_lmm;
1612 ma->ma_lmm_size = info->eti_big_lmmsize;
1613 }
1614
1615 return 0;
1616 }
1617
1618 static int echo_create_md_object(const struct lu_env *env,
1619 struct echo_device *ed,
1620 struct lu_object *ec_parent,
1621 struct lu_fid *fid,
1622 char *name, int namelen,
1623 __u64 id, __u32 mode, int count,
1624 int stripe_count, int stripe_offset)
1625 {
1626 struct lu_object *parent;
1627 struct echo_thread_info *info = echo_env_info(env);
1628 struct lu_name *lname = &info->eti_lname;
1629 struct md_op_spec *spec = &info->eti_spec;
1630 struct md_attr *ma = &info->eti_ma;
1631 struct lu_device *ld = ed->ed_next;
1632 int rc = 0;
1633 int i;
1634
1635 if (ec_parent == NULL)
1636 return -1;
1637 parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
1638 if (parent == NULL)
1639 return -ENXIO;
1640
1641 memset(ma, 0, sizeof(*ma));
1642 memset(spec, 0, sizeof(*spec));
1643 if (stripe_count != 0) {
1644 spec->sp_cr_flags |= FMODE_WRITE;
1645 echo_set_lmm_size(env, ld, ma);
1646 if (stripe_count != -1) {
1647 struct lov_user_md_v3 *lum = &info->eti_lum;
1648
1649 lum->lmm_magic = LOV_USER_MAGIC_V3;
1650 lum->lmm_stripe_count = stripe_count;
1651 lum->lmm_stripe_offset = stripe_offset;
1652 lum->lmm_pattern = 0;
1653 spec->u.sp_ea.eadata = lum;
1654 spec->u.sp_ea.eadatalen = sizeof(*lum);
1655 spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
1656 }
1657 }
1658
1659 ma->ma_attr.la_mode = mode;
1660 ma->ma_attr.la_valid = LA_CTIME | LA_MODE;
1661 ma->ma_attr.la_ctime = cfs_time_current_64();
1662
1663 if (name != NULL) {
1664 lname->ln_name = name;
1665 lname->ln_namelen = namelen;
1666 /* If name is specified, only create one object by name */
1667 rc = echo_md_create_internal(env, ed, lu2md(parent), fid, lname,
1668 spec, ma);
1669 return rc;
1670 }
1671
1672 /* Create multiple object sequenced by id */
1673 for (i = 0; i < count; i++) {
1674 char *tmp_name = info->eti_name;
1675
1676 echo_md_build_name(lname, tmp_name, id);
1677
1678 rc = echo_md_create_internal(env, ed, lu2md(parent), fid, lname,
1679 spec, ma);
1680 if (rc) {
1681 CERROR("Can not create child %s: rc = %d\n", tmp_name,
1682 rc);
1683 break;
1684 }
1685 id++;
1686 fid->f_oid++;
1687 }
1688
1689 return rc;
1690 }
1691
1692 static struct lu_object *echo_md_lookup(const struct lu_env *env,
1693 struct echo_device *ed,
1694 struct md_object *parent,
1695 struct lu_name *lname)
1696 {
1697 struct echo_thread_info *info = echo_env_info(env);
1698 struct lu_fid *fid = &info->eti_fid;
1699 struct lu_object *child;
1700 int rc;
1701
1702 CDEBUG(D_INFO, "lookup %s in parent "DFID" %p\n", lname->ln_name,
1703 PFID(fid), parent);
1704 rc = mdo_lookup(env, parent, lname, fid, NULL);
1705 if (rc) {
1706 CERROR("lookup %s: rc = %d\n", lname->ln_name, rc);
1707 return ERR_PTR(rc);
1708 }
1709
1710 /* In the function below, .hs_keycmp resolves to
1711 * lu_obj_hop_keycmp() */
1712 /* coverity[overrun-buffer-val] */
1713 child = lu_object_find_at(env, &ed->ed_cl.cd_lu_dev, fid, NULL);
1714
1715 return child;
1716 }
1717
1718 static int echo_setattr_object(const struct lu_env *env,
1719 struct echo_device *ed,
1720 struct lu_object *ec_parent,
1721 __u64 id, int count)
1722 {
1723 struct lu_object *parent;
1724 struct echo_thread_info *info = echo_env_info(env);
1725 struct lu_name *lname = &info->eti_lname;
1726 char *name = info->eti_name;
1727 struct lu_device *ld = ed->ed_next;
1728 struct lu_buf *buf = &info->eti_buf;
1729 int rc = 0;
1730 int i;
1731
1732 if (ec_parent == NULL)
1733 return -1;
1734 parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
1735 if (parent == NULL)
1736 return -ENXIO;
1737
1738 for (i = 0; i < count; i++) {
1739 struct lu_object *ec_child, *child;
1740
1741 echo_md_build_name(lname, name, id);
1742
1743 ec_child = echo_md_lookup(env, ed, lu2md(parent), lname);
1744 if (IS_ERR(ec_child)) {
1745 CERROR("Can't find child %s: rc = %ld\n",
1746 lname->ln_name, PTR_ERR(ec_child));
1747 return PTR_ERR(ec_child);
1748 }
1749
1750 child = lu_object_locate(ec_child->lo_header, ld->ld_type);
1751 if (child == NULL) {
1752 CERROR("Can not locate the child %s\n", lname->ln_name);
1753 lu_object_put(env, ec_child);
1754 rc = -EINVAL;
1755 break;
1756 }
1757
1758 CDEBUG(D_RPCTRACE, "Start setattr object "DFID"\n",
1759 PFID(lu_object_fid(child)));
1760
1761 buf->lb_buf = info->eti_xattr_buf;
1762 buf->lb_len = sizeof(info->eti_xattr_buf);
1763
1764 sprintf(name, "%s.test1", XATTR_USER_PREFIX);
1765 rc = mo_xattr_set(env, lu2md(child), buf, name,
1766 LU_XATTR_CREATE);
1767 if (rc < 0) {
1768 CERROR("Can not setattr child "DFID": rc = %d\n",
1769 PFID(lu_object_fid(child)), rc);
1770 lu_object_put(env, ec_child);
1771 break;
1772 }
1773 CDEBUG(D_RPCTRACE, "End setattr object "DFID"\n",
1774 PFID(lu_object_fid(child)));
1775 id++;
1776 lu_object_put(env, ec_child);
1777 }
1778 return rc;
1779 }
1780
1781 static int echo_getattr_object(const struct lu_env *env,
1782 struct echo_device *ed,
1783 struct lu_object *ec_parent,
1784 __u64 id, int count)
1785 {
1786 struct lu_object *parent;
1787 struct echo_thread_info *info = echo_env_info(env);
1788 struct lu_name *lname = &info->eti_lname;
1789 char *name = info->eti_name;
1790 struct md_attr *ma = &info->eti_ma;
1791 struct lu_device *ld = ed->ed_next;
1792 int rc = 0;
1793 int i;
1794
1795 if (ec_parent == NULL)
1796 return -1;
1797 parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
1798 if (parent == NULL)
1799 return -ENXIO;
1800
1801 memset(ma, 0, sizeof(*ma));
1802 ma->ma_need |= MA_INODE | MA_LOV | MA_PFID | MA_HSM | MA_ACL_DEF;
1803 ma->ma_acl = info->eti_xattr_buf;
1804 ma->ma_acl_size = sizeof(info->eti_xattr_buf);
1805
1806 for (i = 0; i < count; i++) {
1807 struct lu_object *ec_child, *child;
1808
1809 ma->ma_valid = 0;
1810 echo_md_build_name(lname, name, id);
1811 echo_set_lmm_size(env, ld, ma);
1812
1813 ec_child = echo_md_lookup(env, ed, lu2md(parent), lname);
1814 if (IS_ERR(ec_child)) {
1815 CERROR("Can't find child %s: rc = %ld\n",
1816 lname->ln_name, PTR_ERR(ec_child));
1817 return PTR_ERR(ec_child);
1818 }
1819
1820 child = lu_object_locate(ec_child->lo_header, ld->ld_type);
1821 if (child == NULL) {
1822 CERROR("Can not locate the child %s\n", lname->ln_name);
1823 lu_object_put(env, ec_child);
1824 return -EINVAL;
1825 }
1826
1827 CDEBUG(D_RPCTRACE, "Start getattr object "DFID"\n",
1828 PFID(lu_object_fid(child)));
1829 rc = echo_attr_get_complex(env, lu2md(child), ma);
1830 if (rc) {
1831 CERROR("Can not getattr child "DFID": rc = %d\n",
1832 PFID(lu_object_fid(child)), rc);
1833 lu_object_put(env, ec_child);
1834 break;
1835 }
1836 CDEBUG(D_RPCTRACE, "End getattr object "DFID"\n",
1837 PFID(lu_object_fid(child)));
1838 id++;
1839 lu_object_put(env, ec_child);
1840 }
1841
1842 return rc;
1843 }
1844
1845 static int echo_lookup_object(const struct lu_env *env,
1846 struct echo_device *ed,
1847 struct lu_object *ec_parent,
1848 __u64 id, int count)
1849 {
1850 struct lu_object *parent;
1851 struct echo_thread_info *info = echo_env_info(env);
1852 struct lu_name *lname = &info->eti_lname;
1853 char *name = info->eti_name;
1854 struct lu_fid *fid = &info->eti_fid;
1855 struct lu_device *ld = ed->ed_next;
1856 int rc = 0;
1857 int i;
1858
1859 if (ec_parent == NULL)
1860 return -1;
1861 parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
1862 if (parent == NULL)
1863 return -ENXIO;
1864
1865 /*prepare the requests*/
1866 for (i = 0; i < count; i++) {
1867 echo_md_build_name(lname, name, id);
1868
1869 CDEBUG(D_RPCTRACE, "Start lookup object "DFID" %s %p\n",
1870 PFID(lu_object_fid(parent)), lname->ln_name, parent);
1871
1872 rc = mdo_lookup(env, lu2md(parent), lname, fid, NULL);
1873 if (rc) {
1874 CERROR("Can not lookup child %s: rc = %d\n", name, rc);
1875 break;
1876 }
1877 CDEBUG(D_RPCTRACE, "End lookup object "DFID" %s %p\n",
1878 PFID(lu_object_fid(parent)), lname->ln_name, parent);
1879
1880 id++;
1881 }
1882 return rc;
1883 }
1884
1885 static int echo_md_destroy_internal(const struct lu_env *env,
1886 struct echo_device *ed,
1887 struct md_object *parent,
1888 struct lu_name *lname,
1889 struct md_attr *ma)
1890 {
1891 struct lu_device *ld = ed->ed_next;
1892 struct lu_object *ec_child;
1893 struct lu_object *child;
1894 int rc;
1895
1896 ec_child = echo_md_lookup(env, ed, parent, lname);
1897 if (IS_ERR(ec_child)) {
1898 CERROR("Can't find child %s: rc = %ld\n", lname->ln_name,
1899 PTR_ERR(ec_child));
1900 return PTR_ERR(ec_child);
1901 }
1902
1903 child = lu_object_locate(ec_child->lo_header, ld->ld_type);
1904 if (child == NULL) {
1905 CERROR("Can not locate the child %s\n", lname->ln_name);
1906 GOTO(out_put, rc = -EINVAL);
1907 }
1908
1909 CDEBUG(D_RPCTRACE, "Start destroy object "DFID" %s %p\n",
1910 PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent);
1911
1912 rc = mdo_unlink(env, parent, lu2md(child), lname, ma, 0);
1913 if (rc) {
1914 CERROR("Can not unlink child %s: rc = %d\n",
1915 lname->ln_name, rc);
1916 GOTO(out_put, rc);
1917 }
1918 CDEBUG(D_RPCTRACE, "End destroy object "DFID" %s %p\n",
1919 PFID(lu_object_fid(&parent->mo_lu)), lname->ln_name, parent);
1920 out_put:
1921 lu_object_put(env, ec_child);
1922 return rc;
1923 }
1924
1925 static int echo_destroy_object(const struct lu_env *env,
1926 struct echo_device *ed,
1927 struct lu_object *ec_parent,
1928 char *name, int namelen,
1929 __u64 id, __u32 mode,
1930 int count)
1931 {
1932 struct echo_thread_info *info = echo_env_info(env);
1933 struct lu_name *lname = &info->eti_lname;
1934 struct md_attr *ma = &info->eti_ma;
1935 struct lu_device *ld = ed->ed_next;
1936 struct lu_object *parent;
1937 int rc = 0;
1938 int i;
1939
1940 parent = lu_object_locate(ec_parent->lo_header, ld->ld_type);
1941 if (parent == NULL)
1942 return -EINVAL;
1943
1944 memset(ma, 0, sizeof(*ma));
1945 ma->ma_attr.la_mode = mode;
1946 ma->ma_attr.la_valid = LA_CTIME;
1947 ma->ma_attr.la_ctime = cfs_time_current_64();
1948 ma->ma_need = MA_INODE;
1949 ma->ma_valid = 0;
1950
1951 if (name != NULL) {
1952 lname->ln_name = name;
1953 lname->ln_namelen = namelen;
1954 rc = echo_md_destroy_internal(env, ed, lu2md(parent), lname,
1955 ma);
1956 return rc;
1957 }
1958
1959 /*prepare the requests*/
1960 for (i = 0; i < count; i++) {
1961 char *tmp_name = info->eti_name;
1962
1963 ma->ma_valid = 0;
1964 echo_md_build_name(lname, tmp_name, id);
1965
1966 rc = echo_md_destroy_internal(env, ed, lu2md(parent), lname,
1967 ma);
1968 if (rc) {
1969 CERROR("Can not unlink child %s: rc = %d\n", name, rc);
1970 break;
1971 }
1972 id++;
1973 }
1974
1975 return rc;
1976 }
1977
1978 static struct lu_object *echo_resolve_path(const struct lu_env *env,
1979 struct echo_device *ed, char *path,
1980 int path_len)
1981 {
1982 struct lu_device *ld = ed->ed_next;
1983 struct md_device *md = lu2md_dev(ld);
1984 struct echo_thread_info *info = echo_env_info(env);
1985 struct lu_fid *fid = &info->eti_fid;
1986 struct lu_name *lname = &info->eti_lname;
1987 struct lu_object *parent = NULL;
1988 struct lu_object *child = NULL;
1989 int rc = 0;
1990
1991 /*Only support MDD layer right now*/
1992 rc = md->md_ops->mdo_root_get(env, md, fid);
1993 if (rc) {
1994 CERROR("get root error: rc = %d\n", rc);
1995 return ERR_PTR(rc);
1996 }
1997
1998 /* In the function below, .hs_keycmp resolves to
1999 * lu_obj_hop_keycmp() */
2000 /* coverity[overrun-buffer-val] */
2001 parent = lu_object_find_at(env, &ed->ed_cl.cd_lu_dev, fid, NULL);
2002 if (IS_ERR(parent)) {
2003 CERROR("Can not find the parent "DFID": rc = %ld\n",
2004 PFID(fid), PTR_ERR(parent));
2005 return parent;
2006 }
2007
2008 while (1) {
2009 struct lu_object *ld_parent;
2010 char *e;
2011
2012 e = strsep(&path, "/");
2013 if (e == NULL)
2014 break;
2015
2016 if (e[0] == 0) {
2017 if (!path || path[0] == '\0')
2018 break;
2019 continue;
2020 }
2021
2022 lname->ln_name = e;
2023 lname->ln_namelen = strlen(e);
2024
2025 ld_parent = lu_object_locate(parent->lo_header, ld->ld_type);
2026 if (ld_parent == NULL) {
2027 lu_object_put(env, parent);
2028 rc = -EINVAL;
2029 break;
2030 }
2031
2032 child = echo_md_lookup(env, ed, lu2md(ld_parent), lname);
2033 lu_object_put(env, parent);
2034 if (IS_ERR(child)) {
2035 rc = (int)PTR_ERR(child);
2036 CERROR("lookup %s under parent "DFID": rc = %d\n",
2037 lname->ln_name, PFID(lu_object_fid(ld_parent)),
2038 rc);
2039 break;
2040 }
2041 parent = child;
2042 }
2043 if (rc)
2044 return ERR_PTR(rc);
2045
2046 return parent;
2047 }
2048
2049 static void echo_ucred_init(struct lu_env *env)
2050 {
2051 struct lu_ucred *ucred = lu_ucred(env);
2052
2053 ucred->uc_valid = UCRED_INVALID;
2054
2055 ucred->uc_suppgids[0] = -1;
2056 ucred->uc_suppgids[1] = -1;
2057
2058 ucred->uc_uid = ucred->uc_o_uid =
2059 from_kuid(&init_user_ns, current_uid());
2060 ucred->uc_gid = ucred->uc_o_gid =
2061 from_kgid(&init_user_ns, current_gid());
2062 ucred->uc_fsuid = ucred->uc_o_fsuid =
2063 from_kuid(&init_user_ns, current_fsuid());
2064 ucred->uc_fsgid = ucred->uc_o_fsgid =
2065 from_kgid(&init_user_ns, current_fsgid());
2066 ucred->uc_cap = cfs_curproc_cap_pack();
2067
2068 /* remove fs privilege for non-root user. */
2069 if (ucred->uc_fsuid)
2070 ucred->uc_cap &= ~CFS_CAP_FS_MASK;
2071 ucred->uc_valid = UCRED_NEW;
2072 }
2073
2074 static void echo_ucred_fini(struct lu_env *env)
2075 {
2076 struct lu_ucred *ucred = lu_ucred(env);
2077 ucred->uc_valid = UCRED_INIT;
2078 }
2079
2080 #define ECHO_MD_CTX_TAG (LCT_REMEMBER | LCT_MD_THREAD)
2081 #define ECHO_MD_SES_TAG (LCT_REMEMBER | LCT_SESSION)
2082 static int echo_md_handler(struct echo_device *ed, int command,
2083 char *path, int path_len, __u64 id, int count,
2084 struct obd_ioctl_data *data)
2085 {
2086 struct echo_thread_info *info;
2087 struct lu_device *ld = ed->ed_next;
2088 struct lu_env *env;
2089 int refcheck;
2090 struct lu_object *parent;
2091 char *name = NULL;
2092 int namelen = data->ioc_plen2;
2093 int rc = 0;
2094
2095 if (ld == NULL) {
2096 CERROR("MD echo client is not being initialized properly\n");
2097 return -EINVAL;
2098 }
2099
2100 if (strcmp(ld->ld_type->ldt_name, LUSTRE_MDD_NAME)) {
2101 CERROR("Only support MDD layer right now!\n");
2102 return -EINVAL;
2103 }
2104
2105 env = cl_env_get(&refcheck);
2106 if (IS_ERR(env))
2107 return PTR_ERR(env);
2108
2109 rc = lu_env_refill_by_tags(env, ECHO_MD_CTX_TAG, ECHO_MD_SES_TAG);
2110 if (rc != 0)
2111 GOTO(out_env, rc);
2112
2113 /* init big_lmm buffer */
2114 info = echo_env_info(env);
2115 LASSERT(info->eti_big_lmm == NULL);
2116 OBD_ALLOC_LARGE(info->eti_big_lmm, MIN_MD_SIZE);
2117 if (info->eti_big_lmm == NULL)
2118 GOTO(out_env, rc = -ENOMEM);
2119 info->eti_big_lmmsize = MIN_MD_SIZE;
2120
2121 parent = echo_resolve_path(env, ed, path, path_len);
2122 if (IS_ERR(parent)) {
2123 CERROR("Can not resolve the path %s: rc = %ld\n", path,
2124 PTR_ERR(parent));
2125 GOTO(out_free, rc = PTR_ERR(parent));
2126 }
2127
2128 if (namelen > 0) {
2129 OBD_ALLOC(name, namelen + 1);
2130 if (name == NULL)
2131 GOTO(out_put, rc = -ENOMEM);
2132 if (copy_from_user(name, data->ioc_pbuf2, namelen))
2133 GOTO(out_name, rc = -EFAULT);
2134 }
2135
2136 echo_ucred_init(env);
2137
2138 switch (command) {
2139 case ECHO_MD_CREATE:
2140 case ECHO_MD_MKDIR: {
2141 struct echo_thread_info *info = echo_env_info(env);
2142 __u32 mode = data->ioc_obdo2.o_mode;
2143 struct lu_fid *fid = &info->eti_fid;
2144 int stripe_count = (int)data->ioc_obdo2.o_misc;
2145 int stripe_index = (int)data->ioc_obdo2.o_stripe_idx;
2146
2147 rc = ostid_to_fid(fid, &data->ioc_obdo1.o_oi, 0);
2148 if (rc != 0)
2149 break;
2150
2151 /* In the function below, .hs_keycmp resolves to
2152 * lu_obj_hop_keycmp() */
2153 /* coverity[overrun-buffer-val] */
2154 rc = echo_create_md_object(env, ed, parent, fid, name, namelen,
2155 id, mode, count, stripe_count,
2156 stripe_index);
2157 break;
2158 }
2159 case ECHO_MD_DESTROY:
2160 case ECHO_MD_RMDIR: {
2161 __u32 mode = data->ioc_obdo2.o_mode;
2162
2163 rc = echo_destroy_object(env, ed, parent, name, namelen,
2164 id, mode, count);
2165 break;
2166 }
2167 case ECHO_MD_LOOKUP:
2168 rc = echo_lookup_object(env, ed, parent, id, count);
2169 break;
2170 case ECHO_MD_GETATTR:
2171 rc = echo_getattr_object(env, ed, parent, id, count);
2172 break;
2173 case ECHO_MD_SETATTR:
2174 rc = echo_setattr_object(env, ed, parent, id, count);
2175 break;
2176 default:
2177 CERROR("unknown command %d\n", command);
2178 rc = -EINVAL;
2179 break;
2180 }
2181 echo_ucred_fini(env);
2182
2183 out_name:
2184 if (name != NULL)
2185 OBD_FREE(name, namelen + 1);
2186 out_put:
2187 lu_object_put(env, parent);
2188 out_free:
2189 LASSERT(info->eti_big_lmm);
2190 OBD_FREE_LARGE(info->eti_big_lmm, info->eti_big_lmmsize);
2191 info->eti_big_lmm = NULL;
2192 info->eti_big_lmmsize = 0;
2193 out_env:
2194 cl_env_put(env, &refcheck);
2195 return rc;
2196 }
2197
2198 static int echo_create_object(const struct lu_env *env, struct echo_device *ed,
2199 int on_target, struct obdo *oa, void *ulsm,
2200 int ulsm_nob, struct obd_trans_info *oti)
2201 {
2202 struct echo_object *eco;
2203 struct echo_client_obd *ec = ed->ed_ec;
2204 struct lov_stripe_md *lsm = NULL;
2205 int rc;
2206 int created = 0;
2207
2208 if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */
2209 (on_target || /* set_stripe */
2210 ec->ec_nstripes != 0)) { /* LOV */
2211 CERROR ("No valid oid\n");
2212 return -EINVAL;
2213 }
2214
2215 rc = echo_alloc_memmd(ed, &lsm);
2216 if (rc < 0) {
2217 CERROR("Cannot allocate md: rc = %d\n", rc);
2218 GOTO(failed, rc);
2219 }
2220
2221 if (ulsm != NULL) {
2222 int i, idx;
2223
2224 rc = echo_copyin_lsm (ed, lsm, ulsm, ulsm_nob);
2225 if (rc != 0)
2226 GOTO(failed, rc);
2227
2228 if (lsm->lsm_stripe_count == 0)
2229 lsm->lsm_stripe_count = ec->ec_nstripes;
2230
2231 if (lsm->lsm_stripe_size == 0)
2232 lsm->lsm_stripe_size = PAGE_CACHE_SIZE;
2233
2234 idx = cfs_rand();
2235
2236 /* setup stripes: indices + default ids if required */
2237 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2238 if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) == 0)
2239 lsm->lsm_oinfo[i]->loi_oi = lsm->lsm_oi;
2240
2241 lsm->lsm_oinfo[i]->loi_ost_idx =
2242 (idx + i) % ec->ec_nstripes;
2243 }
2244 }
2245
2246 /* setup object ID here for !on_target and LOV hint */
2247 if (oa->o_valid & OBD_MD_FLID) {
2248 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
2249 lsm->lsm_oi = oa->o_oi;
2250 }
2251
2252 if (ostid_id(&lsm->lsm_oi) == 0)
2253 ostid_set_id(&lsm->lsm_oi, ++last_object_id);
2254
2255 rc = 0;
2256 if (on_target) {
2257 /* Only echo objects are allowed to be created */
2258 LASSERT((oa->o_valid & OBD_MD_FLGROUP) &&
2259 (ostid_seq(&oa->o_oi) == FID_SEQ_ECHO));
2260 rc = obd_create(env, ec->ec_exp, oa, &lsm, oti);
2261 if (rc != 0) {
2262 CERROR("Cannot create objects: rc = %d\n", rc);
2263 GOTO(failed, rc);
2264 }
2265 created = 1;
2266 }
2267
2268 /* See what object ID we were given */
2269 oa->o_oi = lsm->lsm_oi;
2270 oa->o_valid |= OBD_MD_FLID;
2271
2272 eco = cl_echo_object_find(ed, &lsm);
2273 if (IS_ERR(eco))
2274 GOTO(failed, rc = PTR_ERR(eco));
2275 cl_echo_object_put(eco);
2276
2277 CDEBUG(D_INFO, "oa oid "DOSTID"\n", POSTID(&oa->o_oi));
2278
2279 failed:
2280 if (created && rc)
2281 obd_destroy(env, ec->ec_exp, oa, lsm, oti, NULL, NULL);
2282 if (lsm)
2283 echo_free_memmd(ed, &lsm);
2284 if (rc)
2285 CERROR("create object failed with: rc = %d\n", rc);
2286 return (rc);
2287 }
2288
2289 static int echo_get_object(struct echo_object **ecop, struct echo_device *ed,
2290 struct obdo *oa)
2291 {
2292 struct lov_stripe_md *lsm = NULL;
2293 struct echo_object *eco;
2294 int rc;
2295
2296 if ((oa->o_valid & OBD_MD_FLID) == 0 || ostid_id(&oa->o_oi) == 0) {
2297 /* disallow use of object id 0 */
2298 CERROR ("No valid oid\n");
2299 return -EINVAL;
2300 }
2301
2302 rc = echo_alloc_memmd(ed, &lsm);
2303 if (rc < 0)
2304 return rc;
2305
2306 lsm->lsm_oi = oa->o_oi;
2307 if (!(oa->o_valid & OBD_MD_FLGROUP))
2308 ostid_set_seq_echo(&lsm->lsm_oi);
2309
2310 rc = 0;
2311 eco = cl_echo_object_find(ed, &lsm);
2312 if (!IS_ERR(eco))
2313 *ecop = eco;
2314 else
2315 rc = PTR_ERR(eco);
2316 if (lsm)
2317 echo_free_memmd(ed, &lsm);
2318 return rc;
2319 }
2320
2321 static void echo_put_object(struct echo_object *eco)
2322 {
2323 if (cl_echo_object_put(eco))
2324 CERROR("echo client: drop an object failed");
2325 }
2326
2327 static void
2328 echo_get_stripe_off_id (struct lov_stripe_md *lsm, obd_off *offp, obd_id *idp)
2329 {
2330 unsigned long stripe_count;
2331 unsigned long stripe_size;
2332 unsigned long width;
2333 unsigned long woffset;
2334 int stripe_index;
2335 obd_off offset;
2336
2337 if (lsm->lsm_stripe_count <= 1)
2338 return;
2339
2340 offset = *offp;
2341 stripe_size = lsm->lsm_stripe_size;
2342 stripe_count = lsm->lsm_stripe_count;
2343
2344 /* width = # bytes in all stripes */
2345 width = stripe_size * stripe_count;
2346
2347 /* woffset = offset within a width; offset = whole number of widths */
2348 woffset = do_div (offset, width);
2349
2350 stripe_index = woffset / stripe_size;
2351
2352 *idp = ostid_id(&lsm->lsm_oinfo[stripe_index]->loi_oi);
2353 *offp = offset * stripe_size + woffset % stripe_size;
2354 }
2355
2356 static void
2357 echo_client_page_debug_setup(struct lov_stripe_md *lsm,
2358 struct page *page, int rw, obd_id id,
2359 obd_off offset, obd_off count)
2360 {
2361 char *addr;
2362 obd_off stripe_off;
2363 obd_id stripe_id;
2364 int delta;
2365
2366 /* no partial pages on the client */
2367 LASSERT(count == PAGE_CACHE_SIZE);
2368
2369 addr = kmap(page);
2370
2371 for (delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
2372 if (rw == OBD_BRW_WRITE) {
2373 stripe_off = offset + delta;
2374 stripe_id = id;
2375 echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id);
2376 } else {
2377 stripe_off = 0xdeadbeef00c0ffeeULL;
2378 stripe_id = 0xdeadbeef00c0ffeeULL;
2379 }
2380 block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE,
2381 stripe_off, stripe_id);
2382 }
2383
2384 kunmap(page);
2385 }
2386
2387 static int echo_client_page_debug_check(struct lov_stripe_md *lsm,
2388 struct page *page, obd_id id,
2389 obd_off offset, obd_off count)
2390 {
2391 obd_off stripe_off;
2392 obd_id stripe_id;
2393 char *addr;
2394 int delta;
2395 int rc;
2396 int rc2;
2397
2398 /* no partial pages on the client */
2399 LASSERT(count == PAGE_CACHE_SIZE);
2400
2401 addr = kmap(page);
2402
2403 for (rc = delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
2404 stripe_off = offset + delta;
2405 stripe_id = id;
2406 echo_get_stripe_off_id (lsm, &stripe_off, &stripe_id);
2407
2408 rc2 = block_debug_check("test_brw",
2409 addr + delta, OBD_ECHO_BLOCK_SIZE,
2410 stripe_off, stripe_id);
2411 if (rc2 != 0) {
2412 CERROR ("Error in echo object "LPX64"\n", id);
2413 rc = rc2;
2414 }
2415 }
2416
2417 kunmap(page);
2418 return rc;
2419 }
2420
2421 static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
2422 struct echo_object *eco, obd_off offset,
2423 obd_size count, int async,
2424 struct obd_trans_info *oti)
2425 {
2426 struct lov_stripe_md *lsm = eco->eo_lsm;
2427 obd_count npages;
2428 struct brw_page *pga;
2429 struct brw_page *pgp;
2430 struct page **pages;
2431 obd_off off;
2432 int i;
2433 int rc;
2434 int verify;
2435 int gfp_mask;
2436 int brw_flags = 0;
2437
2438 verify = (ostid_id(&oa->o_oi) != ECHO_PERSISTENT_OBJID &&
2439 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
2440 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
2441
2442 gfp_mask = ((ostid_id(&oa->o_oi) & 2) == 0) ? GFP_IOFS : GFP_HIGHUSER;
2443
2444 LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ);
2445 LASSERT(lsm != NULL);
2446 LASSERT(ostid_id(&lsm->lsm_oi) == ostid_id(&oa->o_oi));
2447
2448 if (count <= 0 ||
2449 (count & (~CFS_PAGE_MASK)) != 0)
2450 return -EINVAL;
2451
2452 /* XXX think again with misaligned I/O */
2453 npages = count >> PAGE_CACHE_SHIFT;
2454
2455 if (rw == OBD_BRW_WRITE)
2456 brw_flags = OBD_BRW_ASYNC;
2457
2458 OBD_ALLOC(pga, npages * sizeof(*pga));
2459 if (pga == NULL)
2460 return -ENOMEM;
2461
2462 OBD_ALLOC(pages, npages * sizeof(*pages));
2463 if (pages == NULL) {
2464 OBD_FREE(pga, npages * sizeof(*pga));
2465 return -ENOMEM;
2466 }
2467
2468 for (i = 0, pgp = pga, off = offset;
2469 i < npages;
2470 i++, pgp++, off += PAGE_CACHE_SIZE) {
2471
2472 LASSERT (pgp->pg == NULL); /* for cleanup */
2473
2474 rc = -ENOMEM;
2475 OBD_PAGE_ALLOC(pgp->pg, gfp_mask);
2476 if (pgp->pg == NULL)
2477 goto out;
2478
2479 pages[i] = pgp->pg;
2480 pgp->count = PAGE_CACHE_SIZE;
2481 pgp->off = off;
2482 pgp->flag = brw_flags;
2483
2484 if (verify)
2485 echo_client_page_debug_setup(lsm, pgp->pg, rw,
2486 ostid_id(&oa->o_oi), off,
2487 pgp->count);
2488 }
2489
2490 /* brw mode can only be used at client */
2491 LASSERT(ed->ed_next != NULL);
2492 rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);
2493
2494 out:
2495 if (rc != 0 || rw != OBD_BRW_READ)
2496 verify = 0;
2497
2498 for (i = 0, pgp = pga; i < npages; i++, pgp++) {
2499 if (pgp->pg == NULL)
2500 continue;
2501
2502 if (verify) {
2503 int vrc;
2504 vrc = echo_client_page_debug_check(lsm, pgp->pg,
2505 ostid_id(&oa->o_oi),
2506 pgp->off, pgp->count);
2507 if (vrc != 0 && rc == 0)
2508 rc = vrc;
2509 }
2510 OBD_PAGE_FREE(pgp->pg);
2511 }
2512 OBD_FREE(pga, npages * sizeof(*pga));
2513 OBD_FREE(pages, npages * sizeof(*pages));
2514 return rc;
2515 }
2516
2517 static int echo_client_prep_commit(const struct lu_env *env,
2518 struct obd_export *exp, int rw,
2519 struct obdo *oa, struct echo_object *eco,
2520 obd_off offset, obd_size count,
2521 obd_size batch, struct obd_trans_info *oti,
2522 int async)
2523 {
2524 struct lov_stripe_md *lsm = eco->eo_lsm;
2525 struct obd_ioobj ioo;
2526 struct niobuf_local *lnb;
2527 struct niobuf_remote *rnb;
2528 obd_off off;
2529 obd_size npages, tot_pages;
2530 int i, ret = 0, brw_flags = 0;
2531
2532 if (count <= 0 || (count & (~CFS_PAGE_MASK)) != 0 ||
2533 (lsm != NULL && ostid_id(&lsm->lsm_oi) != ostid_id(&oa->o_oi)))
2534 return -EINVAL;
2535
2536 npages = batch >> PAGE_CACHE_SHIFT;
2537 tot_pages = count >> PAGE_CACHE_SHIFT;
2538
2539 OBD_ALLOC(lnb, npages * sizeof(struct niobuf_local));
2540 OBD_ALLOC(rnb, npages * sizeof(struct niobuf_remote));
2541
2542 if (lnb == NULL || rnb == NULL)
2543 GOTO(out, ret = -ENOMEM);
2544
2545 if (rw == OBD_BRW_WRITE && async)
2546 brw_flags |= OBD_BRW_ASYNC;
2547
2548 obdo_to_ioobj(oa, &ioo);
2549
2550 off = offset;
2551
2552 for(; tot_pages; tot_pages -= npages) {
2553 int lpages;
2554
2555 if (tot_pages < npages)
2556 npages = tot_pages;
2557
2558 for (i = 0; i < npages; i++, off += PAGE_CACHE_SIZE) {
2559 rnb[i].offset = off;
2560 rnb[i].len = PAGE_CACHE_SIZE;
2561 rnb[i].flags = brw_flags;
2562 }
2563
2564 ioo.ioo_bufcnt = npages;
2565 oti->oti_transno = 0;
2566
2567 lpages = npages;
2568 ret = obd_preprw(env, rw, exp, oa, 1, &ioo, rnb, &lpages,
2569 lnb, oti, NULL);
2570 if (ret != 0)
2571 GOTO(out, ret);
2572 LASSERT(lpages == npages);
2573
2574 for (i = 0; i < lpages; i++) {
2575 struct page *page = lnb[i].page;
2576
2577 /* read past eof? */
2578 if (page == NULL && lnb[i].rc == 0)
2579 continue;
2580
2581 if (async)
2582 lnb[i].flags |= OBD_BRW_ASYNC;
2583
2584 if (ostid_id(&oa->o_oi) == ECHO_PERSISTENT_OBJID ||
2585 (oa->o_valid & OBD_MD_FLFLAGS) == 0 ||
2586 (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0)
2587 continue;
2588
2589 if (rw == OBD_BRW_WRITE)
2590 echo_client_page_debug_setup(lsm, page, rw,
2591 ostid_id(&oa->o_oi),
2592 rnb[i].offset,
2593 rnb[i].len);
2594 else
2595 echo_client_page_debug_check(lsm, page,
2596 ostid_id(&oa->o_oi),
2597 rnb[i].offset,
2598 rnb[i].len);
2599 }
2600
2601 ret = obd_commitrw(env, rw, exp, oa, 1, &ioo,
2602 rnb, npages, lnb, oti, ret);
2603 if (ret != 0)
2604 GOTO(out, ret);
2605
2606 /* Reset oti otherwise it would confuse ldiskfs. */
2607 memset(oti, 0, sizeof(*oti));
2608
2609 /* Reuse env context. */
2610 lu_context_exit((struct lu_context *)&env->le_ctx);
2611 lu_context_enter((struct lu_context *)&env->le_ctx);
2612 }
2613
2614 out:
2615 if (lnb)
2616 OBD_FREE(lnb, npages * sizeof(struct niobuf_local));
2617 if (rnb)
2618 OBD_FREE(rnb, npages * sizeof(struct niobuf_remote));
2619 return ret;
2620 }
2621
2622 static int echo_client_brw_ioctl(const struct lu_env *env, int rw,
2623 struct obd_export *exp,
2624 struct obd_ioctl_data *data,
2625 struct obd_trans_info *dummy_oti)
2626 {
2627 struct obd_device *obd = class_exp2obd(exp);
2628 struct echo_device *ed = obd2echo_dev(obd);
2629 struct echo_client_obd *ec = ed->ed_ec;
2630 struct obdo *oa = &data->ioc_obdo1;
2631 struct echo_object *eco;
2632 int rc;
2633 int async = 1;
2634 long test_mode;
2635
2636 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
2637
2638 rc = echo_get_object(&eco, ed, oa);
2639 if (rc)
2640 return rc;
2641
2642 oa->o_valid &= ~OBD_MD_FLHANDLE;
2643
2644 /* OFD/obdfilter works only via prep/commit */
2645 test_mode = (long)data->ioc_pbuf1;
2646 if (test_mode == 1)
2647 async = 0;
2648
2649 if (ed->ed_next == NULL && test_mode != 3) {
2650 test_mode = 3;
2651 data->ioc_plen1 = data->ioc_count;
2652 }
2653
2654 /* Truncate batch size to maximum */
2655 if (data->ioc_plen1 > PTLRPC_MAX_BRW_SIZE)
2656 data->ioc_plen1 = PTLRPC_MAX_BRW_SIZE;
2657
2658 switch (test_mode) {
2659 case 1:
2660 /* fall through */
2661 case 2:
2662 rc = echo_client_kbrw(ed, rw, oa,
2663 eco, data->ioc_offset,
2664 data->ioc_count, async, dummy_oti);
2665 break;
2666 case 3:
2667 rc = echo_client_prep_commit(env, ec->ec_exp, rw, oa,
2668 eco, data->ioc_offset,
2669 data->ioc_count, data->ioc_plen1,
2670 dummy_oti, async);
2671 break;
2672 default:
2673 rc = -EINVAL;
2674 }
2675 echo_put_object(eco);
2676 return rc;
2677 }
2678
2679 static int
2680 echo_client_enqueue(struct obd_export *exp, struct obdo *oa,
2681 int mode, obd_off offset, obd_size nob)
2682 {
2683 struct echo_device *ed = obd2echo_dev(exp->exp_obd);
2684 struct lustre_handle *ulh = &oa->o_handle;
2685 struct echo_object *eco;
2686 obd_off end;
2687 int rc;
2688
2689 if (ed->ed_next == NULL)
2690 return -EOPNOTSUPP;
2691
2692 if (!(mode == LCK_PR || mode == LCK_PW))
2693 return -EINVAL;
2694
2695 if ((offset & (~CFS_PAGE_MASK)) != 0 ||
2696 (nob & (~CFS_PAGE_MASK)) != 0)
2697 return -EINVAL;
2698
2699 rc = echo_get_object (&eco, ed, oa);
2700 if (rc != 0)
2701 return rc;
2702
2703 end = (nob == 0) ? ((obd_off) -1) : (offset + nob - 1);
2704 rc = cl_echo_enqueue(eco, offset, end, mode, &ulh->cookie);
2705 if (rc == 0) {
2706 oa->o_valid |= OBD_MD_FLHANDLE;
2707 CDEBUG(D_INFO, "Cookie is "LPX64"\n", ulh->cookie);
2708 }
2709 echo_put_object(eco);
2710 return rc;
2711 }
2712
2713 static int
2714 echo_client_cancel(struct obd_export *exp, struct obdo *oa)
2715 {
2716 struct echo_device *ed = obd2echo_dev(exp->exp_obd);
2717 __u64 cookie = oa->o_handle.cookie;
2718
2719 if ((oa->o_valid & OBD_MD_FLHANDLE) == 0)
2720 return -EINVAL;
2721
2722 CDEBUG(D_INFO, "Cookie is "LPX64"\n", cookie);
2723 return cl_echo_cancel(ed, cookie);
2724 }
2725
2726 static int
2727 echo_client_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2728 void *karg, void *uarg)
2729 {
2730 struct obd_device *obd = exp->exp_obd;
2731 struct echo_device *ed = obd2echo_dev(obd);
2732 struct echo_client_obd *ec = ed->ed_ec;
2733 struct echo_object *eco;
2734 struct obd_ioctl_data *data = karg;
2735 struct obd_trans_info dummy_oti;
2736 struct lu_env *env;
2737 struct oti_req_ack_lock *ack_lock;
2738 struct obdo *oa;
2739 struct lu_fid fid;
2740 int rw = OBD_BRW_READ;
2741 int rc = 0;
2742 int i;
2743
2744 memset(&dummy_oti, 0, sizeof(dummy_oti));
2745
2746 oa = &data->ioc_obdo1;
2747 if (!(oa->o_valid & OBD_MD_FLGROUP)) {
2748 oa->o_valid |= OBD_MD_FLGROUP;
2749 ostid_set_seq_echo(&oa->o_oi);
2750 }
2751
2752 /* This FID is unpacked just for validation at this point */
2753 rc = ostid_to_fid(&fid, &oa->o_oi, 0);
2754 if (rc < 0)
2755 return rc;
2756
2757 OBD_ALLOC_PTR(env);
2758 if (env == NULL)
2759 return -ENOMEM;
2760
2761 rc = lu_env_init(env, LCT_DT_THREAD);
2762 if (rc)
2763 GOTO(out, rc = -ENOMEM);
2764
2765 switch (cmd) {
2766 case OBD_IOC_CREATE: /* may create echo object */
2767 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2768 GOTO (out, rc = -EPERM);
2769
2770 rc = echo_create_object(env, ed, 1, oa, data->ioc_pbuf1,
2771 data->ioc_plen1, &dummy_oti);
2772 GOTO(out, rc);
2773
2774 case OBD_IOC_ECHO_MD: {
2775 int count;
2776 int cmd;
2777 char *dir = NULL;
2778 int dirlen;
2779 __u64 id;
2780
2781 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2782 GOTO(out, rc = -EPERM);
2783
2784 count = data->ioc_count;
2785 cmd = data->ioc_command;
2786
2787 id = ostid_id(&data->ioc_obdo2.o_oi);
2788
2789 dirlen = data->ioc_plen1;
2790 OBD_ALLOC(dir, dirlen + 1);
2791 if (dir == NULL)
2792 GOTO(out, rc = -ENOMEM);
2793
2794 if (copy_from_user(dir, data->ioc_pbuf1, dirlen)) {
2795 OBD_FREE(dir, data->ioc_plen1 + 1);
2796 GOTO(out, rc = -EFAULT);
2797 }
2798
2799 rc = echo_md_handler(ed, cmd, dir, dirlen, id, count, data);
2800 OBD_FREE(dir, dirlen + 1);
2801 GOTO(out, rc);
2802 }
2803 case OBD_IOC_ECHO_ALLOC_SEQ: {
2804 struct lu_env *cl_env;
2805 int refcheck;
2806 __u64 seq;
2807 int max_count;
2808
2809 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2810 GOTO(out, rc = -EPERM);
2811
2812 cl_env = cl_env_get(&refcheck);
2813 if (IS_ERR(cl_env))
2814 GOTO(out, rc = PTR_ERR(cl_env));
2815
2816 rc = lu_env_refill_by_tags(cl_env, ECHO_MD_CTX_TAG,
2817 ECHO_MD_SES_TAG);
2818 if (rc != 0) {
2819 cl_env_put(cl_env, &refcheck);
2820 GOTO(out, rc);
2821 }
2822
2823 rc = seq_client_get_seq(cl_env, ed->ed_cl_seq, &seq);
2824 cl_env_put(cl_env, &refcheck);
2825 if (rc < 0) {
2826 CERROR("%s: Can not alloc seq: rc = %d\n",
2827 obd->obd_name, rc);
2828 GOTO(out, rc);
2829 }
2830
2831 if (copy_to_user(data->ioc_pbuf1, &seq, data->ioc_plen1))
2832 return -EFAULT;
2833
2834 max_count = LUSTRE_METADATA_SEQ_MAX_WIDTH;
2835 if (copy_to_user(data->ioc_pbuf2, &max_count,
2836 data->ioc_plen2))
2837 return -EFAULT;
2838 GOTO(out, rc);
2839 }
2840 case OBD_IOC_DESTROY:
2841 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2842 GOTO (out, rc = -EPERM);
2843
2844 rc = echo_get_object(&eco, ed, oa);
2845 if (rc == 0) {
2846 rc = obd_destroy(env, ec->ec_exp, oa, eco->eo_lsm,
2847 &dummy_oti, NULL, NULL);
2848 if (rc == 0)
2849 eco->eo_deleted = 1;
2850 echo_put_object(eco);
2851 }
2852 GOTO(out, rc);
2853
2854 case OBD_IOC_GETATTR:
2855 rc = echo_get_object(&eco, ed, oa);
2856 if (rc == 0) {
2857 struct obd_info oinfo = { { { 0 } } };
2858 oinfo.oi_md = eco->eo_lsm;
2859 oinfo.oi_oa = oa;
2860 rc = obd_getattr(env, ec->ec_exp, &oinfo);
2861 echo_put_object(eco);
2862 }
2863 GOTO(out, rc);
2864
2865 case OBD_IOC_SETATTR:
2866 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2867 GOTO (out, rc = -EPERM);
2868
2869 rc = echo_get_object(&eco, ed, oa);
2870 if (rc == 0) {
2871 struct obd_info oinfo = { { { 0 } } };
2872 oinfo.oi_oa = oa;
2873 oinfo.oi_md = eco->eo_lsm;
2874
2875 rc = obd_setattr(env, ec->ec_exp, &oinfo, NULL);
2876 echo_put_object(eco);
2877 }
2878 GOTO(out, rc);
2879
2880 case OBD_IOC_BRW_WRITE:
2881 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2882 GOTO (out, rc = -EPERM);
2883
2884 rw = OBD_BRW_WRITE;
2885 /* fall through */
2886 case OBD_IOC_BRW_READ:
2887 rc = echo_client_brw_ioctl(env, rw, exp, data, &dummy_oti);
2888 GOTO(out, rc);
2889
2890 case ECHO_IOC_GET_STRIPE:
2891 rc = echo_get_object(&eco, ed, oa);
2892 if (rc == 0) {
2893 rc = echo_copyout_lsm(eco->eo_lsm, data->ioc_pbuf1,
2894 data->ioc_plen1);
2895 echo_put_object(eco);
2896 }
2897 GOTO(out, rc);
2898
2899 case ECHO_IOC_SET_STRIPE:
2900 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2901 GOTO (out, rc = -EPERM);
2902
2903 if (data->ioc_pbuf1 == NULL) { /* unset */
2904 rc = echo_get_object(&eco, ed, oa);
2905 if (rc == 0) {
2906 eco->eo_deleted = 1;
2907 echo_put_object(eco);
2908 }
2909 } else {
2910 rc = echo_create_object(env, ed, 0, oa,
2911 data->ioc_pbuf1,
2912 data->ioc_plen1, &dummy_oti);
2913 }
2914 GOTO (out, rc);
2915
2916 case ECHO_IOC_ENQUEUE:
2917 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
2918 GOTO (out, rc = -EPERM);
2919
2920 rc = echo_client_enqueue(exp, oa,
2921 data->ioc_conn1, /* lock mode */
2922 data->ioc_offset,
2923 data->ioc_count);/*extent*/
2924 GOTO (out, rc);
2925
2926 case ECHO_IOC_CANCEL:
2927 rc = echo_client_cancel(exp, oa);
2928 GOTO (out, rc);
2929
2930 default:
2931 CERROR ("echo_ioctl(): unrecognised ioctl %#x\n", cmd);
2932 GOTO (out, rc = -ENOTTY);
2933 }
2934
2935 out:
2936 lu_env_fini(env);
2937 OBD_FREE_PTR(env);
2938
2939 /* XXX this should be in a helper also called by target_send_reply */
2940 for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4;
2941 i++, ack_lock++) {
2942 if (!ack_lock->mode)
2943 break;
2944 ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
2945 }
2946
2947 return rc;
2948 }
2949
2950 static int echo_client_setup(const struct lu_env *env,
2951 struct obd_device *obddev, struct lustre_cfg *lcfg)
2952 {
2953 struct echo_client_obd *ec = &obddev->u.echo_client;
2954 struct obd_device *tgt;
2955 struct obd_uuid echo_uuid = { "ECHO_UUID" };
2956 struct obd_connect_data *ocd = NULL;
2957 int rc;
2958
2959 if (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
2960 CERROR("requires a TARGET OBD name\n");
2961 return -EINVAL;
2962 }
2963
2964 tgt = class_name2obd(lustre_cfg_string(lcfg, 1));
2965 if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) {
2966 CERROR("device not attached or not set up (%s)\n",
2967 lustre_cfg_string(lcfg, 1));
2968 return -EINVAL;
2969 }
2970
2971 spin_lock_init(&ec->ec_lock);
2972 INIT_LIST_HEAD (&ec->ec_objects);
2973 INIT_LIST_HEAD (&ec->ec_locks);
2974 ec->ec_unique = 0;
2975 ec->ec_nstripes = 0;
2976
2977 if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) {
2978 lu_context_tags_update(ECHO_MD_CTX_TAG);
2979 lu_session_tags_update(ECHO_MD_SES_TAG);
2980 return 0;
2981 }
2982
2983 OBD_ALLOC(ocd, sizeof(*ocd));
2984 if (ocd == NULL) {
2985 CERROR("Can't alloc ocd connecting to %s\n",
2986 lustre_cfg_string(lcfg, 1));
2987 return -ENOMEM;
2988 }
2989
2990 ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_REQPORTAL |
2991 OBD_CONNECT_BRW_SIZE |
2992 OBD_CONNECT_GRANT | OBD_CONNECT_FULL20 |
2993 OBD_CONNECT_64BITHASH | OBD_CONNECT_LVB_TYPE |
2994 OBD_CONNECT_FID;
2995 ocd->ocd_brw_size = DT_MAX_BRW_SIZE;
2996 ocd->ocd_version = LUSTRE_VERSION_CODE;
2997 ocd->ocd_group = FID_SEQ_ECHO;
2998
2999 rc = obd_connect(env, &ec->ec_exp, tgt, &echo_uuid, ocd, NULL);
3000 if (rc == 0) {
3001 /* Turn off pinger because it connects to tgt obd directly. */
3002 spin_lock(&tgt->obd_dev_lock);
3003 list_del_init(&ec->ec_exp->exp_obd_chain_timed);
3004 spin_unlock(&tgt->obd_dev_lock);
3005 }
3006
3007 OBD_FREE(ocd, sizeof(*ocd));
3008
3009 if (rc != 0) {
3010 CERROR("fail to connect to device %s\n",
3011 lustre_cfg_string(lcfg, 1));
3012 return (rc);
3013 }
3014
3015 return rc;
3016 }
3017
3018 static int echo_client_cleanup(struct obd_device *obddev)
3019 {
3020 struct echo_device *ed = obd2echo_dev(obddev);
3021 struct echo_client_obd *ec = &obddev->u.echo_client;
3022 int rc;
3023
3024 /*Do nothing for Metadata echo client*/
3025 if (ed == NULL )
3026 return 0;
3027
3028 if (ed->ed_next_ismd) {
3029 lu_context_tags_clear(ECHO_MD_CTX_TAG);
3030 lu_session_tags_clear(ECHO_MD_SES_TAG);
3031 return 0;
3032 }
3033
3034 if (!list_empty(&obddev->obd_exports)) {
3035 CERROR("still has clients!\n");
3036 return -EBUSY;
3037 }
3038
3039 LASSERT(atomic_read(&ec->ec_exp->exp_refcount) > 0);
3040 rc = obd_disconnect(ec->ec_exp);
3041 if (rc != 0)
3042 CERROR("fail to disconnect device: %d\n", rc);
3043
3044 return rc;
3045 }
3046
3047 static int echo_client_connect(const struct lu_env *env,
3048 struct obd_export **exp,
3049 struct obd_device *src, struct obd_uuid *cluuid,
3050 struct obd_connect_data *data, void *localdata)
3051 {
3052 int rc;
3053 struct lustre_handle conn = { 0 };
3054
3055 rc = class_connect(&conn, src, cluuid);
3056 if (rc == 0) {
3057 *exp = class_conn2export(&conn);
3058 }
3059
3060 return rc;
3061 }
3062
3063 static int echo_client_disconnect(struct obd_export *exp)
3064 {
3065 #if 0
3066 struct obd_device *obd;
3067 struct echo_client_obd *ec;
3068 struct ec_lock *ecl;
3069 #endif
3070 int rc;
3071
3072 if (exp == NULL)
3073 GOTO(out, rc = -EINVAL);
3074
3075 #if 0
3076 obd = exp->exp_obd;
3077 ec = &obd->u.echo_client;
3078
3079 /* no more contention on export's lock list */
3080 while (!list_empty (&exp->exp_ec_data.eced_locks)) {
3081 ecl = list_entry (exp->exp_ec_data.eced_locks.next,
3082 struct ec_lock, ecl_exp_chain);
3083 list_del (&ecl->ecl_exp_chain);
3084
3085 rc = obd_cancel(ec->ec_exp, ecl->ecl_object->eco_lsm,
3086 ecl->ecl_mode, &ecl->ecl_lock_handle);
3087
3088 CDEBUG (D_INFO, "Cancel lock on object "LPX64" on disconnect "
3089 "(%d)\n", ecl->ecl_object->eco_id, rc);
3090
3091 echo_put_object (ecl->ecl_object);
3092 OBD_FREE (ecl, sizeof (*ecl));
3093 }
3094 #endif
3095
3096 rc = class_disconnect(exp);
3097 GOTO(out, rc);
3098 out:
3099 return rc;
3100 }
3101
3102 static struct obd_ops echo_client_obd_ops = {
3103 .o_owner = THIS_MODULE,
3104
3105 #if 0
3106 .o_setup = echo_client_setup,
3107 .o_cleanup = echo_client_cleanup,
3108 #endif
3109
3110 .o_iocontrol = echo_client_iocontrol,
3111 .o_connect = echo_client_connect,
3112 .o_disconnect = echo_client_disconnect
3113 };
3114
3115 int echo_client_init(void)
3116 {
3117 struct lprocfs_static_vars lvars = { 0 };
3118 int rc;
3119
3120 lprocfs_echo_init_vars(&lvars);
3121
3122 rc = lu_kmem_init(echo_caches);
3123 if (rc == 0) {
3124 rc = class_register_type(&echo_client_obd_ops, NULL,
3125 lvars.module_vars,
3126 LUSTRE_ECHO_CLIENT_NAME,
3127 &echo_device_type);
3128 if (rc)
3129 lu_kmem_fini(echo_caches);
3130 }
3131 return rc;
3132 }
3133
3134 void echo_client_exit(void)
3135 {
3136 class_unregister_type(LUSTRE_ECHO_CLIENT_NAME);
3137 lu_kmem_fini(echo_caches);
3138 }
3139
3140 static int __init obdecho_init(void)
3141 {
3142 struct lprocfs_static_vars lvars;
3143 int rc;
3144
3145 LCONSOLE_INFO("Echo OBD driver; http://www.lustre.org/\n");
3146
3147 LASSERT(PAGE_CACHE_SIZE % OBD_ECHO_BLOCK_SIZE == 0);
3148
3149 lprocfs_echo_init_vars(&lvars);
3150
3151
3152 rc = echo_client_init();
3153
3154 return rc;
3155 }
3156
3157 static void /*__exit*/ obdecho_exit(void)
3158 {
3159 echo_client_exit();
3160
3161 }
3162
3163 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3164 MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
3165 MODULE_LICENSE("GPL");
3166 MODULE_VERSION(LUSTRE_VERSION_STRING);
3167
3168 module_init(obdecho_init);
3169 module_exit(obdecho_exit);
3170
3171 /** @} echo_client */
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