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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 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 | |
9fdaf8c0 | 38 | #include "../../include/linux/libcfs/libcfs.h" |
d7e09d03 | 39 | |
7f2d973a GKH |
40 | #include "../include/obd.h" |
41 | #include "../include/obd_support.h" | |
42 | #include "../include/obd_class.h" | |
43 | #include "../include/lustre_debug.h" | |
44 | #include "../include/lprocfs_status.h" | |
45 | #include "../include/cl_object.h" | |
7f2d973a GKH |
46 | #include "../include/lustre_fid.h" |
47 | #include "../include/lustre_acl.h" | |
48 | #include "../include/lustre_net.h" | |
d7e09d03 PT |
49 | |
50 | #include "echo_internal.h" | |
51 | ||
52 | /** \defgroup echo_client Echo Client | |
53 | * @{ | |
54 | */ | |
55 | ||
56 | struct echo_device { | |
57 | struct cl_device ed_cl; | |
58 | struct echo_client_obd *ed_ec; | |
59 | ||
60 | struct cl_site ed_site_myself; | |
61 | struct cl_site *ed_site; | |
62 | struct lu_device *ed_next; | |
63 | int ed_next_islov; | |
d7e09d03 PT |
64 | }; |
65 | ||
66 | struct echo_object { | |
67 | struct cl_object eo_cl; | |
68 | struct cl_object_header eo_hdr; | |
69 | ||
70 | struct echo_device *eo_dev; | |
71 | struct list_head eo_obj_chain; | |
72 | struct lov_stripe_md *eo_lsm; | |
73 | atomic_t eo_npages; | |
74 | int eo_deleted; | |
75 | }; | |
76 | ||
77 | struct echo_object_conf { | |
78 | struct cl_object_conf eoc_cl; | |
79 | struct lov_stripe_md **eoc_md; | |
80 | }; | |
81 | ||
82 | struct echo_page { | |
83 | struct cl_page_slice ep_cl; | |
84 | struct mutex ep_lock; | |
85 | struct page *ep_vmpage; | |
86 | }; | |
87 | ||
88 | struct echo_lock { | |
89 | struct cl_lock_slice el_cl; | |
90 | struct list_head el_chain; | |
91 | struct echo_object *el_object; | |
92 | __u64 el_cookie; | |
93 | atomic_t el_refcount; | |
94 | }; | |
95 | ||
d7e09d03 PT |
96 | static int echo_client_setup(const struct lu_env *env, |
97 | struct obd_device *obddev, | |
98 | struct lustre_cfg *lcfg); | |
99 | static int echo_client_cleanup(struct obd_device *obddev); | |
100 | ||
101 | ||
102 | /** \defgroup echo_helpers Helper functions | |
103 | * @{ | |
104 | */ | |
105 | static inline struct echo_device *cl2echo_dev(const struct cl_device *dev) | |
106 | { | |
107 | return container_of0(dev, struct echo_device, ed_cl); | |
108 | } | |
109 | ||
110 | static inline struct cl_device *echo_dev2cl(struct echo_device *d) | |
111 | { | |
112 | return &d->ed_cl; | |
113 | } | |
114 | ||
115 | static inline struct echo_device *obd2echo_dev(const struct obd_device *obd) | |
116 | { | |
117 | return cl2echo_dev(lu2cl_dev(obd->obd_lu_dev)); | |
118 | } | |
119 | ||
120 | static inline struct cl_object *echo_obj2cl(struct echo_object *eco) | |
121 | { | |
122 | return &eco->eo_cl; | |
123 | } | |
124 | ||
125 | static inline struct echo_object *cl2echo_obj(const struct cl_object *o) | |
126 | { | |
127 | return container_of(o, struct echo_object, eo_cl); | |
128 | } | |
129 | ||
130 | static inline struct echo_page *cl2echo_page(const struct cl_page_slice *s) | |
131 | { | |
132 | return container_of(s, struct echo_page, ep_cl); | |
133 | } | |
134 | ||
135 | static inline struct echo_lock *cl2echo_lock(const struct cl_lock_slice *s) | |
136 | { | |
137 | return container_of(s, struct echo_lock, el_cl); | |
138 | } | |
139 | ||
140 | static inline struct cl_lock *echo_lock2cl(const struct echo_lock *ecl) | |
141 | { | |
142 | return ecl->el_cl.cls_lock; | |
143 | } | |
144 | ||
145 | static struct lu_context_key echo_thread_key; | |
146 | static inline struct echo_thread_info *echo_env_info(const struct lu_env *env) | |
147 | { | |
148 | struct echo_thread_info *info; | |
ded9f908 | 149 | |
d7e09d03 PT |
150 | info = lu_context_key_get(&env->le_ctx, &echo_thread_key); |
151 | LASSERT(info != NULL); | |
152 | return info; | |
153 | } | |
154 | ||
155 | static inline | |
156 | struct echo_object_conf *cl2echo_conf(const struct cl_object_conf *c) | |
157 | { | |
158 | return container_of(c, struct echo_object_conf, eoc_cl); | |
159 | } | |
160 | ||
161 | /** @} echo_helpers */ | |
162 | ||
163 | static struct echo_object *cl_echo_object_find(struct echo_device *d, | |
164 | struct lov_stripe_md **lsm); | |
165 | static int cl_echo_object_put(struct echo_object *eco); | |
21aef7d9 OD |
166 | static int cl_echo_enqueue(struct echo_object *eco, u64 start, |
167 | u64 end, int mode, __u64 *cookie); | |
168 | static int cl_echo_cancel(struct echo_device *d, __u64 cookie); | |
169 | static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset, | |
d7e09d03 PT |
170 | struct page **pages, int npages, int async); |
171 | ||
172 | static struct echo_thread_info *echo_env_info(const struct lu_env *env); | |
173 | ||
174 | struct echo_thread_info { | |
175 | struct echo_object_conf eti_conf; | |
176 | struct lustre_md eti_md; | |
177 | ||
178 | struct cl_2queue eti_queue; | |
179 | struct cl_io eti_io; | |
180 | struct cl_lock_descr eti_descr; | |
181 | struct lu_fid eti_fid; | |
182 | struct lu_fid eti_fid2; | |
d7e09d03 PT |
183 | }; |
184 | ||
185 | /* No session used right now */ | |
186 | struct echo_session_info { | |
187 | unsigned long dummy; | |
188 | }; | |
189 | ||
190 | static struct kmem_cache *echo_lock_kmem; | |
191 | static struct kmem_cache *echo_object_kmem; | |
192 | static struct kmem_cache *echo_thread_kmem; | |
193 | static struct kmem_cache *echo_session_kmem; | |
d7e09d03 PT |
194 | |
195 | static struct lu_kmem_descr echo_caches[] = { | |
196 | { | |
197 | .ckd_cache = &echo_lock_kmem, | |
198 | .ckd_name = "echo_lock_kmem", | |
cb7e9f7b | 199 | .ckd_size = sizeof(struct echo_lock) |
d7e09d03 PT |
200 | }, |
201 | { | |
202 | .ckd_cache = &echo_object_kmem, | |
203 | .ckd_name = "echo_object_kmem", | |
cb7e9f7b | 204 | .ckd_size = sizeof(struct echo_object) |
d7e09d03 PT |
205 | }, |
206 | { | |
207 | .ckd_cache = &echo_thread_kmem, | |
208 | .ckd_name = "echo_thread_kmem", | |
cb7e9f7b | 209 | .ckd_size = sizeof(struct echo_thread_info) |
d7e09d03 PT |
210 | }, |
211 | { | |
212 | .ckd_cache = &echo_session_kmem, | |
213 | .ckd_name = "echo_session_kmem", | |
cb7e9f7b | 214 | .ckd_size = sizeof(struct echo_session_info) |
d7e09d03 | 215 | }, |
d7e09d03 PT |
216 | { |
217 | .ckd_cache = NULL | |
218 | } | |
219 | }; | |
220 | ||
221 | /** \defgroup echo_page Page operations | |
222 | * | |
223 | * Echo page operations. | |
224 | * | |
225 | * @{ | |
226 | */ | |
227 | static struct page *echo_page_vmpage(const struct lu_env *env, | |
228 | const struct cl_page_slice *slice) | |
229 | { | |
230 | return cl2echo_page(slice)->ep_vmpage; | |
231 | } | |
232 | ||
233 | static int echo_page_own(const struct lu_env *env, | |
234 | const struct cl_page_slice *slice, | |
235 | struct cl_io *io, int nonblock) | |
236 | { | |
237 | struct echo_page *ep = cl2echo_page(slice); | |
238 | ||
239 | if (!nonblock) | |
240 | mutex_lock(&ep->ep_lock); | |
241 | else if (!mutex_trylock(&ep->ep_lock)) | |
242 | return -EAGAIN; | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static void echo_page_disown(const struct lu_env *env, | |
247 | const struct cl_page_slice *slice, | |
248 | struct cl_io *io) | |
249 | { | |
250 | struct echo_page *ep = cl2echo_page(slice); | |
251 | ||
252 | LASSERT(mutex_is_locked(&ep->ep_lock)); | |
253 | mutex_unlock(&ep->ep_lock); | |
254 | } | |
255 | ||
256 | static void echo_page_discard(const struct lu_env *env, | |
257 | const struct cl_page_slice *slice, | |
258 | struct cl_io *unused) | |
259 | { | |
260 | cl_page_delete(env, slice->cpl_page); | |
261 | } | |
262 | ||
263 | static int echo_page_is_vmlocked(const struct lu_env *env, | |
264 | const struct cl_page_slice *slice) | |
265 | { | |
266 | if (mutex_is_locked(&cl2echo_page(slice)->ep_lock)) | |
267 | return -EBUSY; | |
268 | return -ENODATA; | |
269 | } | |
270 | ||
271 | static void echo_page_completion(const struct lu_env *env, | |
272 | const struct cl_page_slice *slice, | |
273 | int ioret) | |
274 | { | |
275 | LASSERT(slice->cpl_page->cp_sync_io != NULL); | |
276 | } | |
277 | ||
278 | static void echo_page_fini(const struct lu_env *env, | |
279 | struct cl_page_slice *slice) | |
280 | { | |
281 | struct echo_page *ep = cl2echo_page(slice); | |
282 | struct echo_object *eco = cl2echo_obj(slice->cpl_obj); | |
283 | struct page *vmpage = ep->ep_vmpage; | |
d7e09d03 PT |
284 | |
285 | atomic_dec(&eco->eo_npages); | |
286 | page_cache_release(vmpage); | |
d7e09d03 PT |
287 | } |
288 | ||
289 | static int echo_page_prep(const struct lu_env *env, | |
290 | const struct cl_page_slice *slice, | |
291 | struct cl_io *unused) | |
292 | { | |
293 | return 0; | |
294 | } | |
295 | ||
296 | static int echo_page_print(const struct lu_env *env, | |
297 | const struct cl_page_slice *slice, | |
298 | void *cookie, lu_printer_t printer) | |
299 | { | |
300 | struct echo_page *ep = cl2echo_page(slice); | |
301 | ||
302 | (*printer)(env, cookie, LUSTRE_ECHO_CLIENT_NAME"-page@%p %d vm@%p\n", | |
303 | ep, mutex_is_locked(&ep->ep_lock), ep->ep_vmpage); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | static const struct cl_page_operations echo_page_ops = { | |
308 | .cpo_own = echo_page_own, | |
309 | .cpo_disown = echo_page_disown, | |
310 | .cpo_discard = echo_page_discard, | |
311 | .cpo_vmpage = echo_page_vmpage, | |
312 | .cpo_fini = echo_page_fini, | |
313 | .cpo_print = echo_page_print, | |
314 | .cpo_is_vmlocked = echo_page_is_vmlocked, | |
315 | .io = { | |
316 | [CRT_READ] = { | |
317 | .cpo_prep = echo_page_prep, | |
318 | .cpo_completion = echo_page_completion, | |
319 | }, | |
320 | [CRT_WRITE] = { | |
321 | .cpo_prep = echo_page_prep, | |
322 | .cpo_completion = echo_page_completion, | |
323 | } | |
324 | } | |
325 | }; | |
326 | /** @} echo_page */ | |
327 | ||
328 | /** \defgroup echo_lock Locking | |
329 | * | |
330 | * echo lock operations | |
331 | * | |
332 | * @{ | |
333 | */ | |
334 | static void echo_lock_fini(const struct lu_env *env, | |
335 | struct cl_lock_slice *slice) | |
336 | { | |
337 | struct echo_lock *ecl = cl2echo_lock(slice); | |
338 | ||
339 | LASSERT(list_empty(&ecl->el_chain)); | |
340 | OBD_SLAB_FREE_PTR(ecl, echo_lock_kmem); | |
341 | } | |
342 | ||
343 | static void echo_lock_delete(const struct lu_env *env, | |
344 | const struct cl_lock_slice *slice) | |
345 | { | |
346 | struct echo_lock *ecl = cl2echo_lock(slice); | |
347 | ||
348 | LASSERT(list_empty(&ecl->el_chain)); | |
349 | } | |
350 | ||
351 | static int echo_lock_fits_into(const struct lu_env *env, | |
352 | const struct cl_lock_slice *slice, | |
353 | const struct cl_lock_descr *need, | |
354 | const struct cl_io *unused) | |
355 | { | |
356 | return 1; | |
357 | } | |
358 | ||
359 | static struct cl_lock_operations echo_lock_ops = { | |
360 | .clo_fini = echo_lock_fini, | |
361 | .clo_delete = echo_lock_delete, | |
362 | .clo_fits_into = echo_lock_fits_into | |
363 | }; | |
364 | ||
365 | /** @} echo_lock */ | |
366 | ||
367 | /** \defgroup echo_cl_ops cl_object operations | |
368 | * | |
369 | * operations for cl_object | |
370 | * | |
371 | * @{ | |
372 | */ | |
373 | static int echo_page_init(const struct lu_env *env, struct cl_object *obj, | |
374 | struct cl_page *page, struct page *vmpage) | |
375 | { | |
376 | struct echo_page *ep = cl_object_page_slice(obj, page); | |
377 | struct echo_object *eco = cl2echo_obj(obj); | |
d7e09d03 PT |
378 | |
379 | ep->ep_vmpage = vmpage; | |
380 | page_cache_get(vmpage); | |
381 | mutex_init(&ep->ep_lock); | |
382 | cl_page_slice_add(page, &ep->ep_cl, obj, &echo_page_ops); | |
383 | atomic_inc(&eco->eo_npages); | |
0a3bdb00 | 384 | return 0; |
d7e09d03 PT |
385 | } |
386 | ||
387 | static int echo_io_init(const struct lu_env *env, struct cl_object *obj, | |
388 | struct cl_io *io) | |
389 | { | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static int echo_lock_init(const struct lu_env *env, | |
394 | struct cl_object *obj, struct cl_lock *lock, | |
395 | const struct cl_io *unused) | |
396 | { | |
397 | struct echo_lock *el; | |
d7e09d03 | 398 | |
0be19afa | 399 | OBD_SLAB_ALLOC_PTR_GFP(el, echo_lock_kmem, GFP_NOFS); |
d7e09d03 PT |
400 | if (el != NULL) { |
401 | cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops); | |
402 | el->el_object = cl2echo_obj(obj); | |
403 | INIT_LIST_HEAD(&el->el_chain); | |
404 | atomic_set(&el->el_refcount, 0); | |
405 | } | |
0a3bdb00 | 406 | return el == NULL ? -ENOMEM : 0; |
d7e09d03 PT |
407 | } |
408 | ||
409 | static int echo_conf_set(const struct lu_env *env, struct cl_object *obj, | |
410 | const struct cl_object_conf *conf) | |
411 | { | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static const struct cl_object_operations echo_cl_obj_ops = { | |
416 | .coo_page_init = echo_page_init, | |
417 | .coo_lock_init = echo_lock_init, | |
418 | .coo_io_init = echo_io_init, | |
419 | .coo_conf_set = echo_conf_set | |
420 | }; | |
421 | /** @} echo_cl_ops */ | |
422 | ||
423 | /** \defgroup echo_lu_ops lu_object operations | |
424 | * | |
425 | * operations for echo lu object. | |
426 | * | |
427 | * @{ | |
428 | */ | |
429 | static int echo_object_init(const struct lu_env *env, struct lu_object *obj, | |
430 | const struct lu_object_conf *conf) | |
431 | { | |
432 | struct echo_device *ed = cl2echo_dev(lu2cl_dev(obj->lo_dev)); | |
433 | struct echo_client_obd *ec = ed->ed_ec; | |
434 | struct echo_object *eco = cl2echo_obj(lu2cl(obj)); | |
5bd07d99 PT |
435 | const struct cl_object_conf *cconf; |
436 | struct echo_object_conf *econf; | |
d7e09d03 PT |
437 | |
438 | if (ed->ed_next) { | |
439 | struct lu_object *below; | |
440 | struct lu_device *under; | |
441 | ||
442 | under = ed->ed_next; | |
443 | below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, | |
444 | under); | |
445 | if (below == NULL) | |
0a3bdb00 | 446 | return -ENOMEM; |
d7e09d03 PT |
447 | lu_object_add(obj, below); |
448 | } | |
449 | ||
5bd07d99 PT |
450 | cconf = lu2cl_conf(conf); |
451 | econf = cl2echo_conf(cconf); | |
d7e09d03 | 452 | |
5bd07d99 PT |
453 | LASSERT(econf->eoc_md); |
454 | eco->eo_lsm = *econf->eoc_md; | |
455 | /* clear the lsm pointer so that it won't get freed. */ | |
456 | *econf->eoc_md = NULL; | |
d7e09d03 PT |
457 | |
458 | eco->eo_dev = ed; | |
459 | atomic_set(&eco->eo_npages, 0); | |
460 | cl_object_page_init(lu2cl(obj), sizeof(struct echo_page)); | |
461 | ||
462 | spin_lock(&ec->ec_lock); | |
463 | list_add_tail(&eco->eo_obj_chain, &ec->ec_objects); | |
464 | spin_unlock(&ec->ec_lock); | |
465 | ||
0a3bdb00 | 466 | return 0; |
d7e09d03 PT |
467 | } |
468 | ||
469 | /* taken from osc_unpackmd() */ | |
470 | static int echo_alloc_memmd(struct echo_device *ed, | |
471 | struct lov_stripe_md **lsmp) | |
472 | { | |
473 | int lsm_size; | |
474 | ||
d7e09d03 PT |
475 | /* If export is lov/osc then use their obd method */ |
476 | if (ed->ed_next != NULL) | |
477 | return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp); | |
478 | /* OFD has no unpackmd method, do everything here */ | |
479 | lsm_size = lov_stripe_md_size(1); | |
480 | ||
481 | LASSERT(*lsmp == NULL); | |
c5b89520 | 482 | *lsmp = kzalloc(lsm_size, GFP_NOFS); |
efeb257d | 483 | if (!*lsmp) |
0a3bdb00 | 484 | return -ENOMEM; |
d7e09d03 | 485 | |
c5b89520 | 486 | (*lsmp)->lsm_oinfo[0] = kzalloc(sizeof(struct lov_oinfo), GFP_NOFS); |
efeb257d | 487 | if (!(*lsmp)->lsm_oinfo[0]) { |
c5b89520 | 488 | kfree(*lsmp); |
0a3bdb00 | 489 | return -ENOMEM; |
d7e09d03 PT |
490 | } |
491 | ||
492 | loi_init((*lsmp)->lsm_oinfo[0]); | |
493 | (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES; | |
494 | ostid_set_seq_echo(&(*lsmp)->lsm_oi); | |
495 | ||
0a3bdb00 | 496 | return lsm_size; |
d7e09d03 PT |
497 | } |
498 | ||
499 | static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp) | |
500 | { | |
501 | int lsm_size; | |
502 | ||
d7e09d03 PT |
503 | /* If export is lov/osc then use their obd method */ |
504 | if (ed->ed_next != NULL) | |
505 | return obd_free_memmd(ed->ed_ec->ec_exp, lsmp); | |
506 | /* OFD has no unpackmd method, do everything here */ | |
507 | lsm_size = lov_stripe_md_size(1); | |
508 | ||
509 | LASSERT(*lsmp != NULL); | |
c5b89520 JL |
510 | kfree((*lsmp)->lsm_oinfo[0]); |
511 | kfree(*lsmp); | |
d7e09d03 | 512 | *lsmp = NULL; |
0a3bdb00 | 513 | return 0; |
d7e09d03 PT |
514 | } |
515 | ||
516 | static void echo_object_free(const struct lu_env *env, struct lu_object *obj) | |
517 | { | |
518 | struct echo_object *eco = cl2echo_obj(lu2cl(obj)); | |
519 | struct echo_client_obd *ec = eco->eo_dev->ed_ec; | |
d7e09d03 PT |
520 | |
521 | LASSERT(atomic_read(&eco->eo_npages) == 0); | |
522 | ||
523 | spin_lock(&ec->ec_lock); | |
524 | list_del_init(&eco->eo_obj_chain); | |
525 | spin_unlock(&ec->ec_lock); | |
526 | ||
527 | lu_object_fini(obj); | |
528 | lu_object_header_fini(obj->lo_header); | |
529 | ||
530 | if (eco->eo_lsm) | |
531 | echo_free_memmd(eco->eo_dev, &eco->eo_lsm); | |
532 | OBD_SLAB_FREE_PTR(eco, echo_object_kmem); | |
d7e09d03 PT |
533 | } |
534 | ||
535 | static int echo_object_print(const struct lu_env *env, void *cookie, | |
536 | lu_printer_t p, const struct lu_object *o) | |
537 | { | |
538 | struct echo_object *obj = cl2echo_obj(lu2cl(o)); | |
539 | ||
540 | return (*p)(env, cookie, "echoclient-object@%p", obj); | |
541 | } | |
542 | ||
543 | static const struct lu_object_operations echo_lu_obj_ops = { | |
544 | .loo_object_init = echo_object_init, | |
545 | .loo_object_delete = NULL, | |
546 | .loo_object_release = NULL, | |
547 | .loo_object_free = echo_object_free, | |
548 | .loo_object_print = echo_object_print, | |
549 | .loo_object_invariant = NULL | |
550 | }; | |
551 | /** @} echo_lu_ops */ | |
552 | ||
553 | /** \defgroup echo_lu_dev_ops lu_device operations | |
554 | * | |
555 | * Operations for echo lu device. | |
556 | * | |
557 | * @{ | |
558 | */ | |
559 | static struct lu_object *echo_object_alloc(const struct lu_env *env, | |
560 | const struct lu_object_header *hdr, | |
561 | struct lu_device *dev) | |
562 | { | |
563 | struct echo_object *eco; | |
564 | struct lu_object *obj = NULL; | |
d7e09d03 PT |
565 | |
566 | /* we're the top dev. */ | |
567 | LASSERT(hdr == NULL); | |
0be19afa | 568 | OBD_SLAB_ALLOC_PTR_GFP(eco, echo_object_kmem, GFP_NOFS); |
d7e09d03 PT |
569 | if (eco != NULL) { |
570 | struct cl_object_header *hdr = &eco->eo_hdr; | |
571 | ||
572 | obj = &echo_obj2cl(eco)->co_lu; | |
573 | cl_object_header_init(hdr); | |
574 | lu_object_init(obj, &hdr->coh_lu, dev); | |
575 | lu_object_add_top(&hdr->coh_lu, obj); | |
576 | ||
577 | eco->eo_cl.co_ops = &echo_cl_obj_ops; | |
578 | obj->lo_ops = &echo_lu_obj_ops; | |
579 | } | |
0a3bdb00 | 580 | return obj; |
d7e09d03 PT |
581 | } |
582 | ||
583 | static struct lu_device_operations echo_device_lu_ops = { | |
584 | .ldo_object_alloc = echo_object_alloc, | |
585 | }; | |
586 | ||
587 | /** @} echo_lu_dev_ops */ | |
588 | ||
589 | static struct cl_device_operations echo_device_cl_ops = { | |
590 | }; | |
591 | ||
592 | /** \defgroup echo_init Setup and teardown | |
593 | * | |
594 | * Init and fini functions for echo client. | |
595 | * | |
596 | * @{ | |
597 | */ | |
598 | static int echo_site_init(const struct lu_env *env, struct echo_device *ed) | |
599 | { | |
600 | struct cl_site *site = &ed->ed_site_myself; | |
601 | int rc; | |
602 | ||
603 | /* initialize site */ | |
604 | rc = cl_site_init(site, &ed->ed_cl); | |
605 | if (rc) { | |
c4f39553 | 606 | CERROR("Cannot initialize site for echo client(%d)\n", rc); |
d7e09d03 PT |
607 | return rc; |
608 | } | |
609 | ||
610 | rc = lu_site_init_finish(&site->cs_lu); | |
611 | if (rc) | |
612 | return rc; | |
613 | ||
614 | ed->ed_site = site; | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static void echo_site_fini(const struct lu_env *env, struct echo_device *ed) | |
619 | { | |
620 | if (ed->ed_site) { | |
5bd07d99 | 621 | cl_site_fini(ed->ed_site); |
d7e09d03 PT |
622 | ed->ed_site = NULL; |
623 | } | |
624 | } | |
625 | ||
626 | static void *echo_thread_key_init(const struct lu_context *ctx, | |
627 | struct lu_context_key *key) | |
628 | { | |
629 | struct echo_thread_info *info; | |
630 | ||
0be19afa | 631 | OBD_SLAB_ALLOC_PTR_GFP(info, echo_thread_kmem, GFP_NOFS); |
d7e09d03 PT |
632 | if (info == NULL) |
633 | info = ERR_PTR(-ENOMEM); | |
634 | return info; | |
635 | } | |
636 | ||
637 | static void echo_thread_key_fini(const struct lu_context *ctx, | |
638 | struct lu_context_key *key, void *data) | |
639 | { | |
640 | struct echo_thread_info *info = data; | |
ded9f908 | 641 | |
d7e09d03 PT |
642 | OBD_SLAB_FREE_PTR(info, echo_thread_kmem); |
643 | } | |
644 | ||
645 | static void echo_thread_key_exit(const struct lu_context *ctx, | |
646 | struct lu_context_key *key, void *data) | |
647 | { | |
648 | } | |
649 | ||
650 | static struct lu_context_key echo_thread_key = { | |
651 | .lct_tags = LCT_CL_THREAD, | |
652 | .lct_init = echo_thread_key_init, | |
653 | .lct_fini = echo_thread_key_fini, | |
654 | .lct_exit = echo_thread_key_exit | |
655 | }; | |
656 | ||
657 | static void *echo_session_key_init(const struct lu_context *ctx, | |
658 | struct lu_context_key *key) | |
659 | { | |
660 | struct echo_session_info *session; | |
661 | ||
0be19afa | 662 | OBD_SLAB_ALLOC_PTR_GFP(session, echo_session_kmem, GFP_NOFS); |
d7e09d03 PT |
663 | if (session == NULL) |
664 | session = ERR_PTR(-ENOMEM); | |
665 | return session; | |
666 | } | |
667 | ||
668 | static void echo_session_key_fini(const struct lu_context *ctx, | |
669 | struct lu_context_key *key, void *data) | |
670 | { | |
671 | struct echo_session_info *session = data; | |
ded9f908 | 672 | |
d7e09d03 PT |
673 | OBD_SLAB_FREE_PTR(session, echo_session_kmem); |
674 | } | |
675 | ||
676 | static void echo_session_key_exit(const struct lu_context *ctx, | |
677 | struct lu_context_key *key, void *data) | |
678 | { | |
679 | } | |
680 | ||
681 | static struct lu_context_key echo_session_key = { | |
682 | .lct_tags = LCT_SESSION, | |
683 | .lct_init = echo_session_key_init, | |
684 | .lct_fini = echo_session_key_fini, | |
685 | .lct_exit = echo_session_key_exit | |
686 | }; | |
687 | ||
688 | LU_TYPE_INIT_FINI(echo, &echo_thread_key, &echo_session_key); | |
689 | ||
d7e09d03 PT |
690 | static struct lu_device *echo_device_alloc(const struct lu_env *env, |
691 | struct lu_device_type *t, | |
692 | struct lustre_cfg *cfg) | |
693 | { | |
694 | struct lu_device *next; | |
695 | struct echo_device *ed; | |
696 | struct cl_device *cd; | |
697 | struct obd_device *obd = NULL; /* to keep compiler happy */ | |
698 | struct obd_device *tgt; | |
699 | const char *tgt_type_name; | |
700 | int rc; | |
701 | int cleanup = 0; | |
d7e09d03 | 702 | |
c5b89520 | 703 | ed = kzalloc(sizeof(*ed), GFP_NOFS); |
efeb257d | 704 | if (!ed) { |
abb368ab JY |
705 | rc = -ENOMEM; |
706 | goto out; | |
707 | } | |
d7e09d03 PT |
708 | |
709 | cleanup = 1; | |
710 | cd = &ed->ed_cl; | |
711 | rc = cl_device_init(cd, t); | |
712 | if (rc) | |
abb368ab | 713 | goto out; |
d7e09d03 PT |
714 | |
715 | cd->cd_lu_dev.ld_ops = &echo_device_lu_ops; | |
716 | cd->cd_ops = &echo_device_cl_ops; | |
717 | ||
718 | cleanup = 2; | |
719 | obd = class_name2obd(lustre_cfg_string(cfg, 0)); | |
720 | LASSERT(obd != NULL); | |
721 | LASSERT(env != NULL); | |
722 | ||
723 | tgt = class_name2obd(lustre_cfg_string(cfg, 1)); | |
724 | if (tgt == NULL) { | |
725 | CERROR("Can not find tgt device %s\n", | |
726 | lustre_cfg_string(cfg, 1)); | |
abb368ab JY |
727 | rc = -ENODEV; |
728 | goto out; | |
d7e09d03 PT |
729 | } |
730 | ||
731 | next = tgt->obd_lu_dev; | |
732 | if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) { | |
5bd07d99 | 733 | CERROR("echo MDT client must be run on server\n"); |
abb368ab JY |
734 | rc = -EOPNOTSUPP; |
735 | goto out; | |
d7e09d03 | 736 | } |
5bd07d99 PT |
737 | |
738 | rc = echo_site_init(env, ed); | |
739 | if (rc) | |
abb368ab | 740 | goto out; |
5bd07d99 | 741 | |
d7e09d03 PT |
742 | cleanup = 3; |
743 | ||
744 | rc = echo_client_setup(env, obd, cfg); | |
745 | if (rc) | |
abb368ab | 746 | goto out; |
d7e09d03 PT |
747 | |
748 | ed->ed_ec = &obd->u.echo_client; | |
749 | cleanup = 4; | |
750 | ||
5bd07d99 PT |
751 | /* if echo client is to be stacked upon ost device, the next is |
752 | * NULL since ost is not a clio device so far */ | |
753 | if (next != NULL && !lu_device_is_cl(next)) | |
754 | next = NULL; | |
755 | ||
756 | tgt_type_name = tgt->obd_type->typ_name; | |
757 | if (next != NULL) { | |
758 | LASSERT(next != NULL); | |
abb368ab JY |
759 | if (next->ld_site != NULL) { |
760 | rc = -EBUSY; | |
761 | goto out; | |
762 | } | |
5bd07d99 PT |
763 | |
764 | next->ld_site = &ed->ed_site->cs_lu; | |
765 | rc = next->ld_type->ldt_ops->ldto_device_init(env, next, | |
766 | next->ld_type->ldt_name, | |
767 | NULL); | |
768 | if (rc) | |
abb368ab | 769 | goto out; |
5bd07d99 PT |
770 | |
771 | /* Tricky case, I have to determine the obd type since | |
772 | * CLIO uses the different parameters to initialize | |
773 | * objects for lov & osc. */ | |
774 | if (strcmp(tgt_type_name, LUSTRE_LOV_NAME) == 0) | |
775 | ed->ed_next_islov = 1; | |
776 | else | |
777 | LASSERT(strcmp(tgt_type_name, | |
778 | LUSTRE_OSC_NAME) == 0); | |
d7e09d03 | 779 | } else { |
5bd07d99 | 780 | LASSERT(strcmp(tgt_type_name, LUSTRE_OST_NAME) == 0); |
d7e09d03 PT |
781 | } |
782 | ||
783 | ed->ed_next = next; | |
0a3bdb00 | 784 | return &cd->cd_lu_dev; |
d7e09d03 | 785 | out: |
a58a38ac | 786 | switch (cleanup) { |
d7e09d03 PT |
787 | case 4: { |
788 | int rc2; | |
ded9f908 | 789 | |
d7e09d03 PT |
790 | rc2 = echo_client_cleanup(obd); |
791 | if (rc2) | |
792 | CERROR("Cleanup obd device %s error(%d)\n", | |
793 | obd->obd_name, rc2); | |
794 | } | |
795 | ||
796 | case 3: | |
797 | echo_site_fini(env, ed); | |
798 | case 2: | |
799 | cl_device_fini(&ed->ed_cl); | |
800 | case 1: | |
c5b89520 | 801 | kfree(ed); |
d7e09d03 PT |
802 | case 0: |
803 | default: | |
804 | break; | |
805 | } | |
fbe7c6c7 | 806 | return ERR_PTR(rc); |
d7e09d03 PT |
807 | } |
808 | ||
809 | static int echo_device_init(const struct lu_env *env, struct lu_device *d, | |
810 | const char *name, struct lu_device *next) | |
811 | { | |
812 | LBUG(); | |
813 | return 0; | |
814 | } | |
815 | ||
816 | static struct lu_device *echo_device_fini(const struct lu_env *env, | |
817 | struct lu_device *d) | |
818 | { | |
819 | struct echo_device *ed = cl2echo_dev(lu2cl_dev(d)); | |
820 | struct lu_device *next = ed->ed_next; | |
821 | ||
5bd07d99 | 822 | while (next) |
d7e09d03 PT |
823 | next = next->ld_type->ldt_ops->ldto_device_fini(env, next); |
824 | return NULL; | |
825 | } | |
826 | ||
827 | static void echo_lock_release(const struct lu_env *env, | |
828 | struct echo_lock *ecl, | |
829 | int still_used) | |
830 | { | |
831 | struct cl_lock *clk = echo_lock2cl(ecl); | |
832 | ||
833 | cl_lock_get(clk); | |
834 | cl_unuse(env, clk); | |
835 | cl_lock_release(env, clk, "ec enqueue", ecl->el_object); | |
836 | if (!still_used) { | |
837 | cl_lock_mutex_get(env, clk); | |
838 | cl_lock_cancel(env, clk); | |
839 | cl_lock_delete(env, clk); | |
840 | cl_lock_mutex_put(env, clk); | |
841 | } | |
842 | cl_lock_put(env, clk); | |
843 | } | |
844 | ||
845 | static struct lu_device *echo_device_free(const struct lu_env *env, | |
846 | struct lu_device *d) | |
847 | { | |
848 | struct echo_device *ed = cl2echo_dev(lu2cl_dev(d)); | |
849 | struct echo_client_obd *ec = ed->ed_ec; | |
850 | struct echo_object *eco; | |
851 | struct lu_device *next = ed->ed_next; | |
852 | ||
853 | CDEBUG(D_INFO, "echo device:%p is going to be freed, next = %p\n", | |
854 | ed, next); | |
855 | ||
856 | lu_site_purge(env, &ed->ed_site->cs_lu, -1); | |
857 | ||
858 | /* check if there are objects still alive. | |
859 | * It shouldn't have any object because lu_site_purge would cleanup | |
860 | * all of cached objects. Anyway, probably the echo device is being | |
861 | * parallelly accessed. | |
862 | */ | |
863 | spin_lock(&ec->ec_lock); | |
864 | list_for_each_entry(eco, &ec->ec_objects, eo_obj_chain) | |
865 | eco->eo_deleted = 1; | |
866 | spin_unlock(&ec->ec_lock); | |
867 | ||
868 | /* purge again */ | |
869 | lu_site_purge(env, &ed->ed_site->cs_lu, -1); | |
870 | ||
871 | CDEBUG(D_INFO, | |
872 | "Waiting for the reference of echo object to be dropped\n"); | |
873 | ||
874 | /* Wait for the last reference to be dropped. */ | |
875 | spin_lock(&ec->ec_lock); | |
876 | while (!list_empty(&ec->ec_objects)) { | |
877 | spin_unlock(&ec->ec_lock); | |
2d00bd17 | 878 | CERROR("echo_client still has objects at cleanup time, wait for 1 second\n"); |
18fd5baa PT |
879 | set_current_state(TASK_UNINTERRUPTIBLE); |
880 | schedule_timeout(cfs_time_seconds(1)); | |
d7e09d03 PT |
881 | lu_site_purge(env, &ed->ed_site->cs_lu, -1); |
882 | spin_lock(&ec->ec_lock); | |
883 | } | |
884 | spin_unlock(&ec->ec_lock); | |
885 | ||
886 | LASSERT(list_empty(&ec->ec_locks)); | |
887 | ||
888 | CDEBUG(D_INFO, "No object exists, exiting...\n"); | |
889 | ||
890 | echo_client_cleanup(d->ld_obd); | |
5bd07d99 PT |
891 | |
892 | while (next) | |
d7e09d03 PT |
893 | next = next->ld_type->ldt_ops->ldto_device_free(env, next); |
894 | ||
895 | LASSERT(ed->ed_site == lu2cl_site(d->ld_site)); | |
896 | echo_site_fini(env, ed); | |
897 | cl_device_fini(&ed->ed_cl); | |
c5b89520 | 898 | kfree(ed); |
d7e09d03 PT |
899 | |
900 | return NULL; | |
901 | } | |
902 | ||
903 | static const struct lu_device_type_operations echo_device_type_ops = { | |
904 | .ldto_init = echo_type_init, | |
905 | .ldto_fini = echo_type_fini, | |
906 | ||
907 | .ldto_start = echo_type_start, | |
908 | .ldto_stop = echo_type_stop, | |
909 | ||
910 | .ldto_device_alloc = echo_device_alloc, | |
911 | .ldto_device_free = echo_device_free, | |
912 | .ldto_device_init = echo_device_init, | |
913 | .ldto_device_fini = echo_device_fini | |
914 | }; | |
915 | ||
916 | static struct lu_device_type echo_device_type = { | |
917 | .ldt_tags = LU_DEVICE_CL, | |
918 | .ldt_name = LUSTRE_ECHO_CLIENT_NAME, | |
919 | .ldt_ops = &echo_device_type_ops, | |
5bd07d99 | 920 | .ldt_ctx_tags = LCT_CL_THREAD, |
d7e09d03 PT |
921 | }; |
922 | /** @} echo_init */ | |
923 | ||
924 | /** \defgroup echo_exports Exported operations | |
925 | * | |
926 | * exporting functions to echo client | |
927 | * | |
928 | * @{ | |
929 | */ | |
930 | ||
931 | /* Interfaces to echo client obd device */ | |
932 | static struct echo_object *cl_echo_object_find(struct echo_device *d, | |
933 | struct lov_stripe_md **lsmp) | |
934 | { | |
935 | struct lu_env *env; | |
936 | struct echo_thread_info *info; | |
937 | struct echo_object_conf *conf; | |
938 | struct lov_stripe_md *lsm; | |
939 | struct echo_object *eco; | |
940 | struct cl_object *obj; | |
941 | struct lu_fid *fid; | |
942 | int refcheck; | |
943 | int rc; | |
d7e09d03 PT |
944 | |
945 | LASSERT(lsmp); | |
946 | lsm = *lsmp; | |
947 | LASSERT(lsm); | |
8f405503 | 948 | LASSERTF(ostid_id(&lsm->lsm_oi) != 0, DOSTID"\n", POSTID(&lsm->lsm_oi)); |
949 | LASSERTF(ostid_seq(&lsm->lsm_oi) == FID_SEQ_ECHO, DOSTID"\n", | |
950 | POSTID(&lsm->lsm_oi)); | |
d7e09d03 PT |
951 | |
952 | /* Never return an object if the obd is to be freed. */ | |
953 | if (echo_dev2cl(d)->cd_lu_dev.ld_obd->obd_stopping) | |
0a3bdb00 | 954 | return ERR_PTR(-ENODEV); |
d7e09d03 PT |
955 | |
956 | env = cl_env_get(&refcheck); | |
957 | if (IS_ERR(env)) | |
0a3bdb00 | 958 | return (void *)env; |
d7e09d03 PT |
959 | |
960 | info = echo_env_info(env); | |
961 | conf = &info->eti_conf; | |
962 | if (d->ed_next) { | |
963 | if (!d->ed_next_islov) { | |
964 | struct lov_oinfo *oinfo = lsm->lsm_oinfo[0]; | |
ded9f908 | 965 | |
d7e09d03 PT |
966 | LASSERT(oinfo != NULL); |
967 | oinfo->loi_oi = lsm->lsm_oi; | |
968 | conf->eoc_cl.u.coc_oinfo = oinfo; | |
969 | } else { | |
970 | struct lustre_md *md; | |
ded9f908 | 971 | |
d7e09d03 | 972 | md = &info->eti_md; |
ec83e611 | 973 | memset(md, 0, sizeof(*md)); |
d7e09d03 PT |
974 | md->lsm = lsm; |
975 | conf->eoc_cl.u.coc_md = md; | |
976 | } | |
977 | } | |
978 | conf->eoc_md = lsmp; | |
979 | ||
980 | fid = &info->eti_fid; | |
981 | rc = ostid_to_fid(fid, &lsm->lsm_oi, 0); | |
abb368ab JY |
982 | if (rc != 0) { |
983 | eco = ERR_PTR(rc); | |
984 | goto out; | |
985 | } | |
d7e09d03 PT |
986 | |
987 | /* In the function below, .hs_keycmp resolves to | |
988 | * lu_obj_hop_keycmp() */ | |
989 | /* coverity[overrun-buffer-val] */ | |
990 | obj = cl_object_find(env, echo_dev2cl(d), fid, &conf->eoc_cl); | |
abb368ab JY |
991 | if (IS_ERR(obj)) { |
992 | eco = (void *)obj; | |
993 | goto out; | |
994 | } | |
d7e09d03 PT |
995 | |
996 | eco = cl2echo_obj(obj); | |
997 | if (eco->eo_deleted) { | |
998 | cl_object_put(env, obj); | |
999 | eco = ERR_PTR(-EAGAIN); | |
1000 | } | |
1001 | ||
1002 | out: | |
1003 | cl_env_put(env, &refcheck); | |
0a3bdb00 | 1004 | return eco; |
d7e09d03 PT |
1005 | } |
1006 | ||
1007 | static int cl_echo_object_put(struct echo_object *eco) | |
1008 | { | |
1009 | struct lu_env *env; | |
1010 | struct cl_object *obj = echo_obj2cl(eco); | |
1011 | int refcheck; | |
d7e09d03 PT |
1012 | |
1013 | env = cl_env_get(&refcheck); | |
1014 | if (IS_ERR(env)) | |
0a3bdb00 | 1015 | return PTR_ERR(env); |
d7e09d03 PT |
1016 | |
1017 | /* an external function to kill an object? */ | |
1018 | if (eco->eo_deleted) { | |
1019 | struct lu_object_header *loh = obj->co_lu.lo_header; | |
ded9f908 | 1020 | |
d7e09d03 PT |
1021 | LASSERT(&eco->eo_hdr == luh2coh(loh)); |
1022 | set_bit(LU_OBJECT_HEARD_BANSHEE, &loh->loh_flags); | |
1023 | } | |
1024 | ||
1025 | cl_object_put(env, obj); | |
1026 | cl_env_put(env, &refcheck); | |
0a3bdb00 | 1027 | return 0; |
d7e09d03 PT |
1028 | } |
1029 | ||
1030 | static int cl_echo_enqueue0(struct lu_env *env, struct echo_object *eco, | |
21aef7d9 | 1031 | u64 start, u64 end, int mode, |
d841438a | 1032 | __u64 *cookie, __u32 enqflags) |
d7e09d03 PT |
1033 | { |
1034 | struct cl_io *io; | |
1035 | struct cl_lock *lck; | |
1036 | struct cl_object *obj; | |
1037 | struct cl_lock_descr *descr; | |
1038 | struct echo_thread_info *info; | |
1039 | int rc = -ENOMEM; | |
d7e09d03 PT |
1040 | |
1041 | info = echo_env_info(env); | |
1042 | io = &info->eti_io; | |
1043 | descr = &info->eti_descr; | |
1044 | obj = echo_obj2cl(eco); | |
1045 | ||
1046 | descr->cld_obj = obj; | |
1047 | descr->cld_start = cl_index(obj, start); | |
1048 | descr->cld_end = cl_index(obj, end); | |
1049 | descr->cld_mode = mode == LCK_PW ? CLM_WRITE : CLM_READ; | |
1050 | descr->cld_enq_flags = enqflags; | |
1051 | io->ci_obj = obj; | |
1052 | ||
1053 | lck = cl_lock_request(env, io, descr, "ec enqueue", eco); | |
1054 | if (lck) { | |
1055 | struct echo_client_obd *ec = eco->eo_dev->ed_ec; | |
1056 | struct echo_lock *el; | |
1057 | ||
1058 | rc = cl_wait(env, lck); | |
1059 | if (rc == 0) { | |
1060 | el = cl2echo_lock(cl_lock_at(lck, &echo_device_type)); | |
1061 | spin_lock(&ec->ec_lock); | |
1062 | if (list_empty(&el->el_chain)) { | |
1063 | list_add(&el->el_chain, &ec->ec_locks); | |
1064 | el->el_cookie = ++ec->ec_unique; | |
1065 | } | |
1066 | atomic_inc(&el->el_refcount); | |
1067 | *cookie = el->el_cookie; | |
1068 | spin_unlock(&ec->ec_lock); | |
1069 | } else { | |
1070 | cl_lock_release(env, lck, "ec enqueue", current); | |
1071 | } | |
1072 | } | |
0a3bdb00 | 1073 | return rc; |
d7e09d03 PT |
1074 | } |
1075 | ||
21aef7d9 | 1076 | static int cl_echo_enqueue(struct echo_object *eco, u64 start, u64 end, |
d7e09d03 PT |
1077 | int mode, __u64 *cookie) |
1078 | { | |
1079 | struct echo_thread_info *info; | |
1080 | struct lu_env *env; | |
1081 | struct cl_io *io; | |
1082 | int refcheck; | |
1083 | int result; | |
d7e09d03 PT |
1084 | |
1085 | env = cl_env_get(&refcheck); | |
1086 | if (IS_ERR(env)) | |
0a3bdb00 | 1087 | return PTR_ERR(env); |
d7e09d03 PT |
1088 | |
1089 | info = echo_env_info(env); | |
1090 | io = &info->eti_io; | |
1091 | ||
1092 | io->ci_ignore_layout = 1; | |
1093 | result = cl_io_init(env, io, CIT_MISC, echo_obj2cl(eco)); | |
1094 | if (result < 0) | |
abb368ab | 1095 | goto out; |
d7e09d03 PT |
1096 | LASSERT(result == 0); |
1097 | ||
1098 | result = cl_echo_enqueue0(env, eco, start, end, mode, cookie, 0); | |
1099 | cl_io_fini(env, io); | |
1100 | ||
d7e09d03 PT |
1101 | out: |
1102 | cl_env_put(env, &refcheck); | |
1103 | return result; | |
1104 | } | |
1105 | ||
1106 | static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed, | |
1107 | __u64 cookie) | |
1108 | { | |
1109 | struct echo_client_obd *ec = ed->ed_ec; | |
1110 | struct echo_lock *ecl = NULL; | |
1111 | struct list_head *el; | |
1112 | int found = 0, still_used = 0; | |
d7e09d03 PT |
1113 | |
1114 | LASSERT(ec != NULL); | |
1115 | spin_lock(&ec->ec_lock); | |
cb7e9f7b DU |
1116 | list_for_each(el, &ec->ec_locks) { |
1117 | ecl = list_entry(el, struct echo_lock, el_chain); | |
55f5a824 | 1118 | CDEBUG(D_INFO, "ecl: %p, cookie: %#llx\n", ecl, ecl->el_cookie); |
d7e09d03 PT |
1119 | found = (ecl->el_cookie == cookie); |
1120 | if (found) { | |
1121 | if (atomic_dec_and_test(&ecl->el_refcount)) | |
1122 | list_del_init(&ecl->el_chain); | |
1123 | else | |
1124 | still_used = 1; | |
1125 | break; | |
1126 | } | |
1127 | } | |
1128 | spin_unlock(&ec->ec_lock); | |
1129 | ||
1130 | if (!found) | |
0a3bdb00 | 1131 | return -ENOENT; |
d7e09d03 PT |
1132 | |
1133 | echo_lock_release(env, ecl, still_used); | |
0a3bdb00 | 1134 | return 0; |
d7e09d03 PT |
1135 | } |
1136 | ||
1137 | static int cl_echo_cancel(struct echo_device *ed, __u64 cookie) | |
1138 | { | |
1139 | struct lu_env *env; | |
1140 | int refcheck; | |
1141 | int rc; | |
d7e09d03 PT |
1142 | |
1143 | env = cl_env_get(&refcheck); | |
1144 | if (IS_ERR(env)) | |
0a3bdb00 | 1145 | return PTR_ERR(env); |
d7e09d03 PT |
1146 | |
1147 | rc = cl_echo_cancel0(env, ed, cookie); | |
1148 | ||
1149 | cl_env_put(env, &refcheck); | |
0a3bdb00 | 1150 | return rc; |
d7e09d03 PT |
1151 | } |
1152 | ||
1153 | static int cl_echo_async_brw(const struct lu_env *env, struct cl_io *io, | |
1154 | enum cl_req_type unused, struct cl_2queue *queue) | |
1155 | { | |
1156 | struct cl_page *clp; | |
1157 | struct cl_page *temp; | |
1158 | int result = 0; | |
d7e09d03 PT |
1159 | |
1160 | cl_page_list_for_each_safe(clp, temp, &queue->c2_qin) { | |
1161 | int rc; | |
ded9f908 | 1162 | |
d7e09d03 PT |
1163 | rc = cl_page_cache_add(env, io, clp, CRT_WRITE); |
1164 | if (rc == 0) | |
1165 | continue; | |
1166 | result = result ?: rc; | |
1167 | } | |
0a3bdb00 | 1168 | return result; |
d7e09d03 PT |
1169 | } |
1170 | ||
21aef7d9 | 1171 | static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset, |
d7e09d03 PT |
1172 | struct page **pages, int npages, int async) |
1173 | { | |
1174 | struct lu_env *env; | |
1175 | struct echo_thread_info *info; | |
1176 | struct cl_object *obj = echo_obj2cl(eco); | |
1177 | struct echo_device *ed = eco->eo_dev; | |
1178 | struct cl_2queue *queue; | |
1179 | struct cl_io *io; | |
1180 | struct cl_page *clp; | |
1181 | struct lustre_handle lh = { 0 }; | |
1182 | int page_size = cl_page_size(obj); | |
1183 | int refcheck; | |
1184 | int rc; | |
1185 | int i; | |
d7e09d03 PT |
1186 | |
1187 | LASSERT((offset & ~CFS_PAGE_MASK) == 0); | |
1188 | LASSERT(ed->ed_next != NULL); | |
1189 | env = cl_env_get(&refcheck); | |
1190 | if (IS_ERR(env)) | |
0a3bdb00 | 1191 | return PTR_ERR(env); |
d7e09d03 PT |
1192 | |
1193 | info = echo_env_info(env); | |
1194 | io = &info->eti_io; | |
1195 | queue = &info->eti_queue; | |
1196 | ||
1197 | cl_2queue_init(queue); | |
1198 | ||
1199 | io->ci_ignore_layout = 1; | |
1200 | rc = cl_io_init(env, io, CIT_MISC, obj); | |
1201 | if (rc < 0) | |
abb368ab | 1202 | goto out; |
d7e09d03 PT |
1203 | LASSERT(rc == 0); |
1204 | ||
1205 | ||
1206 | rc = cl_echo_enqueue0(env, eco, offset, | |
1207 | offset + npages * PAGE_CACHE_SIZE - 1, | |
1208 | rw == READ ? LCK_PR : LCK_PW, &lh.cookie, | |
1209 | CEF_NEVER); | |
1210 | if (rc < 0) | |
abb368ab | 1211 | goto error_lock; |
d7e09d03 PT |
1212 | |
1213 | for (i = 0; i < npages; i++) { | |
1214 | LASSERT(pages[i]); | |
1215 | clp = cl_page_find(env, obj, cl_index(obj, offset), | |
1216 | pages[i], CPT_TRANSIENT); | |
1217 | if (IS_ERR(clp)) { | |
1218 | rc = PTR_ERR(clp); | |
1219 | break; | |
1220 | } | |
1221 | LASSERT(clp->cp_type == CPT_TRANSIENT); | |
1222 | ||
1223 | rc = cl_page_own(env, io, clp); | |
1224 | if (rc) { | |
1225 | LASSERT(clp->cp_state == CPS_FREEING); | |
1226 | cl_page_put(env, clp); | |
1227 | break; | |
1228 | } | |
1229 | ||
1230 | cl_2queue_add(queue, clp); | |
1231 | ||
1232 | /* drop the reference count for cl_page_find, so that the page | |
1233 | * will be freed in cl_2queue_fini. */ | |
1234 | cl_page_put(env, clp); | |
1235 | cl_page_clip(env, clp, 0, page_size); | |
1236 | ||
1237 | offset += page_size; | |
1238 | } | |
1239 | ||
1240 | if (rc == 0) { | |
1241 | enum cl_req_type typ = rw == READ ? CRT_READ : CRT_WRITE; | |
1242 | ||
1243 | async = async && (typ == CRT_WRITE); | |
1244 | if (async) | |
1245 | rc = cl_echo_async_brw(env, io, typ, queue); | |
1246 | else | |
1247 | rc = cl_io_submit_sync(env, io, typ, queue, 0); | |
1248 | CDEBUG(D_INFO, "echo_client %s write returns %d\n", | |
1249 | async ? "async" : "sync", rc); | |
1250 | } | |
1251 | ||
1252 | cl_echo_cancel0(env, ed, lh.cookie); | |
d7e09d03 PT |
1253 | error_lock: |
1254 | cl_2queue_discard(env, io, queue); | |
1255 | cl_2queue_disown(env, io, queue); | |
1256 | cl_2queue_fini(env, queue); | |
1257 | cl_io_fini(env, io); | |
1258 | out: | |
1259 | cl_env_put(env, &refcheck); | |
1260 | return rc; | |
1261 | } | |
1262 | /** @} echo_exports */ | |
1263 | ||
1264 | ||
21aef7d9 | 1265 | static u64 last_object_id; |
d7e09d03 PT |
1266 | |
1267 | static int | |
cb7e9f7b | 1268 | echo_copyout_lsm(struct lov_stripe_md *lsm, void *_ulsm, int ulsm_nob) |
d7e09d03 PT |
1269 | { |
1270 | struct lov_stripe_md *ulsm = _ulsm; | |
1271 | int nob, i; | |
1272 | ||
cb7e9f7b | 1273 | nob = offsetof(struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]); |
d7e09d03 | 1274 | if (nob > ulsm_nob) |
fbe7c6c7 | 1275 | return -EINVAL; |
d7e09d03 | 1276 | |
d841438a | 1277 | if (copy_to_user(ulsm, lsm, sizeof(*ulsm))) |
fbe7c6c7 | 1278 | return -EFAULT; |
d7e09d03 PT |
1279 | |
1280 | for (i = 0; i < lsm->lsm_stripe_count; i++) { | |
d841438a | 1281 | if (copy_to_user(ulsm->lsm_oinfo[i], lsm->lsm_oinfo[i], |
d7e09d03 | 1282 | sizeof(lsm->lsm_oinfo[0]))) |
fbe7c6c7 | 1283 | return -EFAULT; |
d7e09d03 PT |
1284 | } |
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | static int | |
cb7e9f7b | 1289 | echo_copyin_lsm(struct echo_device *ed, struct lov_stripe_md *lsm, |
d7e09d03 PT |
1290 | void *ulsm, int ulsm_nob) |
1291 | { | |
1292 | struct echo_client_obd *ec = ed->ed_ec; | |
1293 | int i; | |
1294 | ||
d841438a | 1295 | if (ulsm_nob < sizeof(*lsm)) |
fbe7c6c7 | 1296 | return -EINVAL; |
d7e09d03 | 1297 | |
d841438a | 1298 | if (copy_from_user(lsm, ulsm, sizeof(*lsm))) |
fbe7c6c7 | 1299 | return -EFAULT; |
d7e09d03 PT |
1300 | |
1301 | if (lsm->lsm_stripe_count > ec->ec_nstripes || | |
1302 | lsm->lsm_magic != LOV_MAGIC || | |
1303 | (lsm->lsm_stripe_size & (~CFS_PAGE_MASK)) != 0 || | |
1304 | ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL)) | |
fbe7c6c7 | 1305 | return -EINVAL; |
d7e09d03 PT |
1306 | |
1307 | ||
1308 | for (i = 0; i < lsm->lsm_stripe_count; i++) { | |
1309 | if (copy_from_user(lsm->lsm_oinfo[i], | |
1310 | ((struct lov_stripe_md *)ulsm)-> \ | |
1311 | lsm_oinfo[i], | |
1312 | sizeof(lsm->lsm_oinfo[0]))) | |
fbe7c6c7 | 1313 | return -EFAULT; |
d7e09d03 | 1314 | } |
fbe7c6c7 | 1315 | return 0; |
d7e09d03 PT |
1316 | } |
1317 | ||
d7e09d03 PT |
1318 | static int echo_create_object(const struct lu_env *env, struct echo_device *ed, |
1319 | int on_target, struct obdo *oa, void *ulsm, | |
1320 | int ulsm_nob, struct obd_trans_info *oti) | |
1321 | { | |
1322 | struct echo_object *eco; | |
1323 | struct echo_client_obd *ec = ed->ed_ec; | |
1324 | struct lov_stripe_md *lsm = NULL; | |
1325 | int rc; | |
1326 | int created = 0; | |
d7e09d03 PT |
1327 | |
1328 | if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */ | |
1329 | (on_target || /* set_stripe */ | |
1330 | ec->ec_nstripes != 0)) { /* LOV */ | |
d841438a | 1331 | CERROR("No valid oid\n"); |
0a3bdb00 | 1332 | return -EINVAL; |
d7e09d03 PT |
1333 | } |
1334 | ||
1335 | rc = echo_alloc_memmd(ed, &lsm); | |
1336 | if (rc < 0) { | |
1337 | CERROR("Cannot allocate md: rc = %d\n", rc); | |
abb368ab | 1338 | goto failed; |
d7e09d03 PT |
1339 | } |
1340 | ||
1341 | if (ulsm != NULL) { | |
1342 | int i, idx; | |
1343 | ||
d841438a | 1344 | rc = echo_copyin_lsm(ed, lsm, ulsm, ulsm_nob); |
d7e09d03 | 1345 | if (rc != 0) |
abb368ab | 1346 | goto failed; |
d7e09d03 PT |
1347 | |
1348 | if (lsm->lsm_stripe_count == 0) | |
1349 | lsm->lsm_stripe_count = ec->ec_nstripes; | |
1350 | ||
1351 | if (lsm->lsm_stripe_size == 0) | |
1352 | lsm->lsm_stripe_size = PAGE_CACHE_SIZE; | |
1353 | ||
1354 | idx = cfs_rand(); | |
1355 | ||
1356 | /* setup stripes: indices + default ids if required */ | |
1357 | for (i = 0; i < lsm->lsm_stripe_count; i++) { | |
1358 | if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) == 0) | |
1359 | lsm->lsm_oinfo[i]->loi_oi = lsm->lsm_oi; | |
1360 | ||
1361 | lsm->lsm_oinfo[i]->loi_ost_idx = | |
1362 | (idx + i) % ec->ec_nstripes; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | /* setup object ID here for !on_target and LOV hint */ | |
1367 | if (oa->o_valid & OBD_MD_FLID) { | |
1368 | LASSERT(oa->o_valid & OBD_MD_FLGROUP); | |
1369 | lsm->lsm_oi = oa->o_oi; | |
1370 | } | |
1371 | ||
1372 | if (ostid_id(&lsm->lsm_oi) == 0) | |
1373 | ostid_set_id(&lsm->lsm_oi, ++last_object_id); | |
1374 | ||
1375 | rc = 0; | |
1376 | if (on_target) { | |
1377 | /* Only echo objects are allowed to be created */ | |
1378 | LASSERT((oa->o_valid & OBD_MD_FLGROUP) && | |
1379 | (ostid_seq(&oa->o_oi) == FID_SEQ_ECHO)); | |
1380 | rc = obd_create(env, ec->ec_exp, oa, &lsm, oti); | |
1381 | if (rc != 0) { | |
1382 | CERROR("Cannot create objects: rc = %d\n", rc); | |
abb368ab | 1383 | goto failed; |
d7e09d03 PT |
1384 | } |
1385 | created = 1; | |
1386 | } | |
1387 | ||
1388 | /* See what object ID we were given */ | |
1389 | oa->o_oi = lsm->lsm_oi; | |
1390 | oa->o_valid |= OBD_MD_FLID; | |
1391 | ||
1392 | eco = cl_echo_object_find(ed, &lsm); | |
abb368ab JY |
1393 | if (IS_ERR(eco)) { |
1394 | rc = PTR_ERR(eco); | |
1395 | goto failed; | |
1396 | } | |
d7e09d03 PT |
1397 | cl_echo_object_put(eco); |
1398 | ||
1399 | CDEBUG(D_INFO, "oa oid "DOSTID"\n", POSTID(&oa->o_oi)); | |
d7e09d03 PT |
1400 | |
1401 | failed: | |
1402 | if (created && rc) | |
1403 | obd_destroy(env, ec->ec_exp, oa, lsm, oti, NULL, NULL); | |
1404 | if (lsm) | |
1405 | echo_free_memmd(ed, &lsm); | |
1406 | if (rc) | |
1407 | CERROR("create object failed with: rc = %d\n", rc); | |
fbe7c6c7 | 1408 | return rc; |
d7e09d03 PT |
1409 | } |
1410 | ||
1411 | static int echo_get_object(struct echo_object **ecop, struct echo_device *ed, | |
1412 | struct obdo *oa) | |
1413 | { | |
1414 | struct lov_stripe_md *lsm = NULL; | |
1415 | struct echo_object *eco; | |
1416 | int rc; | |
d7e09d03 PT |
1417 | |
1418 | if ((oa->o_valid & OBD_MD_FLID) == 0 || ostid_id(&oa->o_oi) == 0) { | |
1419 | /* disallow use of object id 0 */ | |
d841438a | 1420 | CERROR("No valid oid\n"); |
0a3bdb00 | 1421 | return -EINVAL; |
d7e09d03 PT |
1422 | } |
1423 | ||
1424 | rc = echo_alloc_memmd(ed, &lsm); | |
1425 | if (rc < 0) | |
0a3bdb00 | 1426 | return rc; |
d7e09d03 PT |
1427 | |
1428 | lsm->lsm_oi = oa->o_oi; | |
1429 | if (!(oa->o_valid & OBD_MD_FLGROUP)) | |
1430 | ostid_set_seq_echo(&lsm->lsm_oi); | |
1431 | ||
1432 | rc = 0; | |
1433 | eco = cl_echo_object_find(ed, &lsm); | |
1434 | if (!IS_ERR(eco)) | |
1435 | *ecop = eco; | |
1436 | else | |
1437 | rc = PTR_ERR(eco); | |
1438 | if (lsm) | |
1439 | echo_free_memmd(ed, &lsm); | |
0a3bdb00 | 1440 | return rc; |
d7e09d03 PT |
1441 | } |
1442 | ||
1443 | static void echo_put_object(struct echo_object *eco) | |
1444 | { | |
1445 | if (cl_echo_object_put(eco)) | |
1446 | CERROR("echo client: drop an object failed"); | |
1447 | } | |
1448 | ||
1449 | static void | |
21aef7d9 | 1450 | echo_get_stripe_off_id(struct lov_stripe_md *lsm, u64 *offp, u64 *idp) |
d7e09d03 PT |
1451 | { |
1452 | unsigned long stripe_count; | |
1453 | unsigned long stripe_size; | |
1454 | unsigned long width; | |
1455 | unsigned long woffset; | |
1456 | int stripe_index; | |
21aef7d9 | 1457 | u64 offset; |
d7e09d03 PT |
1458 | |
1459 | if (lsm->lsm_stripe_count <= 1) | |
1460 | return; | |
1461 | ||
1462 | offset = *offp; | |
1463 | stripe_size = lsm->lsm_stripe_size; | |
1464 | stripe_count = lsm->lsm_stripe_count; | |
1465 | ||
1466 | /* width = # bytes in all stripes */ | |
1467 | width = stripe_size * stripe_count; | |
1468 | ||
1469 | /* woffset = offset within a width; offset = whole number of widths */ | |
d841438a | 1470 | woffset = do_div(offset, width); |
d7e09d03 PT |
1471 | |
1472 | stripe_index = woffset / stripe_size; | |
1473 | ||
1474 | *idp = ostid_id(&lsm->lsm_oinfo[stripe_index]->loi_oi); | |
1475 | *offp = offset * stripe_size + woffset % stripe_size; | |
1476 | } | |
1477 | ||
1478 | static void | |
1479 | echo_client_page_debug_setup(struct lov_stripe_md *lsm, | |
21aef7d9 OD |
1480 | struct page *page, int rw, u64 id, |
1481 | u64 offset, u64 count) | |
d7e09d03 PT |
1482 | { |
1483 | char *addr; | |
21aef7d9 OD |
1484 | u64 stripe_off; |
1485 | u64 stripe_id; | |
d7e09d03 PT |
1486 | int delta; |
1487 | ||
1488 | /* no partial pages on the client */ | |
1489 | LASSERT(count == PAGE_CACHE_SIZE); | |
1490 | ||
1491 | addr = kmap(page); | |
1492 | ||
1493 | for (delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) { | |
1494 | if (rw == OBD_BRW_WRITE) { | |
1495 | stripe_off = offset + delta; | |
1496 | stripe_id = id; | |
1497 | echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id); | |
1498 | } else { | |
1499 | stripe_off = 0xdeadbeef00c0ffeeULL; | |
1500 | stripe_id = 0xdeadbeef00c0ffeeULL; | |
1501 | } | |
1502 | block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE, | |
1503 | stripe_off, stripe_id); | |
1504 | } | |
1505 | ||
1506 | kunmap(page); | |
1507 | } | |
1508 | ||
1509 | static int echo_client_page_debug_check(struct lov_stripe_md *lsm, | |
21aef7d9 OD |
1510 | struct page *page, u64 id, |
1511 | u64 offset, u64 count) | |
d7e09d03 | 1512 | { |
21aef7d9 OD |
1513 | u64 stripe_off; |
1514 | u64 stripe_id; | |
d7e09d03 PT |
1515 | char *addr; |
1516 | int delta; | |
1517 | int rc; | |
1518 | int rc2; | |
1519 | ||
1520 | /* no partial pages on the client */ | |
1521 | LASSERT(count == PAGE_CACHE_SIZE); | |
1522 | ||
1523 | addr = kmap(page); | |
1524 | ||
1525 | for (rc = delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) { | |
1526 | stripe_off = offset + delta; | |
1527 | stripe_id = id; | |
d841438a | 1528 | echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id); |
d7e09d03 PT |
1529 | |
1530 | rc2 = block_debug_check("test_brw", | |
1531 | addr + delta, OBD_ECHO_BLOCK_SIZE, | |
1532 | stripe_off, stripe_id); | |
1533 | if (rc2 != 0) { | |
d841438a | 1534 | CERROR("Error in echo object %#llx\n", id); |
d7e09d03 PT |
1535 | rc = rc2; |
1536 | } | |
1537 | } | |
1538 | ||
1539 | kunmap(page); | |
1540 | return rc; | |
1541 | } | |
1542 | ||
1543 | static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa, | |
21aef7d9 OD |
1544 | struct echo_object *eco, u64 offset, |
1545 | u64 count, int async, | |
d7e09d03 PT |
1546 | struct obd_trans_info *oti) |
1547 | { | |
1548 | struct lov_stripe_md *lsm = eco->eo_lsm; | |
21aef7d9 | 1549 | u32 npages; |
d7e09d03 PT |
1550 | struct brw_page *pga; |
1551 | struct brw_page *pgp; | |
1552 | struct page **pages; | |
21aef7d9 | 1553 | u64 off; |
d7e09d03 PT |
1554 | int i; |
1555 | int rc; | |
1556 | int verify; | |
cad7aa13 | 1557 | gfp_t gfp_mask; |
d7e09d03 | 1558 | int brw_flags = 0; |
d7e09d03 PT |
1559 | |
1560 | verify = (ostid_id(&oa->o_oi) != ECHO_PERSISTENT_OBJID && | |
1561 | (oa->o_valid & OBD_MD_FLFLAGS) != 0 && | |
1562 | (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0); | |
1563 | ||
1564 | gfp_mask = ((ostid_id(&oa->o_oi) & 2) == 0) ? GFP_IOFS : GFP_HIGHUSER; | |
1565 | ||
1566 | LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ); | |
1567 | LASSERT(lsm != NULL); | |
1568 | LASSERT(ostid_id(&lsm->lsm_oi) == ostid_id(&oa->o_oi)); | |
1569 | ||
1570 | if (count <= 0 || | |
1571 | (count & (~CFS_PAGE_MASK)) != 0) | |
0a3bdb00 | 1572 | return -EINVAL; |
d7e09d03 PT |
1573 | |
1574 | /* XXX think again with misaligned I/O */ | |
1575 | npages = count >> PAGE_CACHE_SHIFT; | |
1576 | ||
1577 | if (rw == OBD_BRW_WRITE) | |
1578 | brw_flags = OBD_BRW_ASYNC; | |
1579 | ||
c5b89520 | 1580 | pga = kcalloc(npages, sizeof(*pga), GFP_NOFS); |
d7e09d03 | 1581 | if (pga == NULL) |
0a3bdb00 | 1582 | return -ENOMEM; |
d7e09d03 | 1583 | |
c5b89520 | 1584 | pages = kcalloc(npages, sizeof(*pages), GFP_NOFS); |
d7e09d03 | 1585 | if (pages == NULL) { |
c5b89520 | 1586 | kfree(pga); |
0a3bdb00 | 1587 | return -ENOMEM; |
d7e09d03 PT |
1588 | } |
1589 | ||
1590 | for (i = 0, pgp = pga, off = offset; | |
1591 | i < npages; | |
1592 | i++, pgp++, off += PAGE_CACHE_SIZE) { | |
1593 | ||
d841438a | 1594 | LASSERT(pgp->pg == NULL); /* for cleanup */ |
d7e09d03 PT |
1595 | |
1596 | rc = -ENOMEM; | |
1597 | OBD_PAGE_ALLOC(pgp->pg, gfp_mask); | |
1598 | if (pgp->pg == NULL) | |
1599 | goto out; | |
1600 | ||
1601 | pages[i] = pgp->pg; | |
1602 | pgp->count = PAGE_CACHE_SIZE; | |
1603 | pgp->off = off; | |
1604 | pgp->flag = brw_flags; | |
1605 | ||
1606 | if (verify) | |
1607 | echo_client_page_debug_setup(lsm, pgp->pg, rw, | |
1608 | ostid_id(&oa->o_oi), off, | |
1609 | pgp->count); | |
1610 | } | |
1611 | ||
1612 | /* brw mode can only be used at client */ | |
1613 | LASSERT(ed->ed_next != NULL); | |
1614 | rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async); | |
1615 | ||
1616 | out: | |
1617 | if (rc != 0 || rw != OBD_BRW_READ) | |
1618 | verify = 0; | |
1619 | ||
1620 | for (i = 0, pgp = pga; i < npages; i++, pgp++) { | |
1621 | if (pgp->pg == NULL) | |
1622 | continue; | |
1623 | ||
1624 | if (verify) { | |
1625 | int vrc; | |
ded9f908 | 1626 | |
d7e09d03 PT |
1627 | vrc = echo_client_page_debug_check(lsm, pgp->pg, |
1628 | ostid_id(&oa->o_oi), | |
1629 | pgp->off, pgp->count); | |
1630 | if (vrc != 0 && rc == 0) | |
1631 | rc = vrc; | |
1632 | } | |
1633 | OBD_PAGE_FREE(pgp->pg); | |
1634 | } | |
c5b89520 JL |
1635 | kfree(pga); |
1636 | kfree(pages); | |
0a3bdb00 | 1637 | return rc; |
d7e09d03 PT |
1638 | } |
1639 | ||
1640 | static int echo_client_prep_commit(const struct lu_env *env, | |
1641 | struct obd_export *exp, int rw, | |
1642 | struct obdo *oa, struct echo_object *eco, | |
21aef7d9 OD |
1643 | u64 offset, u64 count, |
1644 | u64 batch, struct obd_trans_info *oti, | |
d7e09d03 PT |
1645 | int async) |
1646 | { | |
1647 | struct lov_stripe_md *lsm = eco->eo_lsm; | |
1648 | struct obd_ioobj ioo; | |
1649 | struct niobuf_local *lnb; | |
1650 | struct niobuf_remote *rnb; | |
21aef7d9 OD |
1651 | u64 off; |
1652 | u64 npages, tot_pages; | |
d7e09d03 PT |
1653 | int i, ret = 0, brw_flags = 0; |
1654 | ||
d7e09d03 PT |
1655 | if (count <= 0 || (count & (~CFS_PAGE_MASK)) != 0 || |
1656 | (lsm != NULL && ostid_id(&lsm->lsm_oi) != ostid_id(&oa->o_oi))) | |
0a3bdb00 | 1657 | return -EINVAL; |
d7e09d03 PT |
1658 | |
1659 | npages = batch >> PAGE_CACHE_SHIFT; | |
1660 | tot_pages = count >> PAGE_CACHE_SHIFT; | |
1661 | ||
c5b89520 JL |
1662 | lnb = kcalloc(npages, sizeof(struct niobuf_local), GFP_NOFS); |
1663 | rnb = kcalloc(npages, sizeof(struct niobuf_remote), GFP_NOFS); | |
d7e09d03 | 1664 | |
abb368ab JY |
1665 | if (lnb == NULL || rnb == NULL) { |
1666 | ret = -ENOMEM; | |
1667 | goto out; | |
1668 | } | |
d7e09d03 PT |
1669 | |
1670 | if (rw == OBD_BRW_WRITE && async) | |
1671 | brw_flags |= OBD_BRW_ASYNC; | |
1672 | ||
1673 | obdo_to_ioobj(oa, &ioo); | |
1674 | ||
1675 | off = offset; | |
1676 | ||
a58a38ac | 1677 | for (; tot_pages; tot_pages -= npages) { |
d7e09d03 PT |
1678 | int lpages; |
1679 | ||
1680 | if (tot_pages < npages) | |
1681 | npages = tot_pages; | |
1682 | ||
1683 | for (i = 0; i < npages; i++, off += PAGE_CACHE_SIZE) { | |
1684 | rnb[i].offset = off; | |
1685 | rnb[i].len = PAGE_CACHE_SIZE; | |
1686 | rnb[i].flags = brw_flags; | |
1687 | } | |
1688 | ||
1689 | ioo.ioo_bufcnt = npages; | |
1690 | oti->oti_transno = 0; | |
1691 | ||
1692 | lpages = npages; | |
1693 | ret = obd_preprw(env, rw, exp, oa, 1, &ioo, rnb, &lpages, | |
1694 | lnb, oti, NULL); | |
1695 | if (ret != 0) | |
abb368ab | 1696 | goto out; |
d7e09d03 PT |
1697 | LASSERT(lpages == npages); |
1698 | ||
1699 | for (i = 0; i < lpages; i++) { | |
1700 | struct page *page = lnb[i].page; | |
1701 | ||
1702 | /* read past eof? */ | |
1703 | if (page == NULL && lnb[i].rc == 0) | |
1704 | continue; | |
1705 | ||
1706 | if (async) | |
1707 | lnb[i].flags |= OBD_BRW_ASYNC; | |
1708 | ||
1709 | if (ostid_id(&oa->o_oi) == ECHO_PERSISTENT_OBJID || | |
1710 | (oa->o_valid & OBD_MD_FLFLAGS) == 0 || | |
1711 | (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0) | |
1712 | continue; | |
1713 | ||
1714 | if (rw == OBD_BRW_WRITE) | |
1715 | echo_client_page_debug_setup(lsm, page, rw, | |
1716 | ostid_id(&oa->o_oi), | |
1717 | rnb[i].offset, | |
1718 | rnb[i].len); | |
1719 | else | |
1720 | echo_client_page_debug_check(lsm, page, | |
1721 | ostid_id(&oa->o_oi), | |
1722 | rnb[i].offset, | |
1723 | rnb[i].len); | |
1724 | } | |
1725 | ||
1726 | ret = obd_commitrw(env, rw, exp, oa, 1, &ioo, | |
1727 | rnb, npages, lnb, oti, ret); | |
1728 | if (ret != 0) | |
abb368ab | 1729 | goto out; |
d7e09d03 PT |
1730 | |
1731 | /* Reset oti otherwise it would confuse ldiskfs. */ | |
1732 | memset(oti, 0, sizeof(*oti)); | |
09b0170e JY |
1733 | |
1734 | /* Reuse env context. */ | |
1735 | lu_context_exit((struct lu_context *)&env->le_ctx); | |
1736 | lu_context_enter((struct lu_context *)&env->le_ctx); | |
d7e09d03 PT |
1737 | } |
1738 | ||
1739 | out: | |
627ef6ea JL |
1740 | kfree(lnb); |
1741 | kfree(rnb); | |
0a3bdb00 | 1742 | return ret; |
d7e09d03 PT |
1743 | } |
1744 | ||
1745 | static int echo_client_brw_ioctl(const struct lu_env *env, int rw, | |
1746 | struct obd_export *exp, | |
1747 | struct obd_ioctl_data *data, | |
1748 | struct obd_trans_info *dummy_oti) | |
1749 | { | |
1750 | struct obd_device *obd = class_exp2obd(exp); | |
1751 | struct echo_device *ed = obd2echo_dev(obd); | |
1752 | struct echo_client_obd *ec = ed->ed_ec; | |
1753 | struct obdo *oa = &data->ioc_obdo1; | |
1754 | struct echo_object *eco; | |
1755 | int rc; | |
1756 | int async = 1; | |
1757 | long test_mode; | |
d7e09d03 PT |
1758 | |
1759 | LASSERT(oa->o_valid & OBD_MD_FLGROUP); | |
1760 | ||
1761 | rc = echo_get_object(&eco, ed, oa); | |
1762 | if (rc) | |
0a3bdb00 | 1763 | return rc; |
d7e09d03 PT |
1764 | |
1765 | oa->o_valid &= ~OBD_MD_FLHANDLE; | |
1766 | ||
1767 | /* OFD/obdfilter works only via prep/commit */ | |
1768 | test_mode = (long)data->ioc_pbuf1; | |
1769 | if (test_mode == 1) | |
1770 | async = 0; | |
1771 | ||
1772 | if (ed->ed_next == NULL && test_mode != 3) { | |
1773 | test_mode = 3; | |
1774 | data->ioc_plen1 = data->ioc_count; | |
1775 | } | |
1776 | ||
1777 | /* Truncate batch size to maximum */ | |
1778 | if (data->ioc_plen1 > PTLRPC_MAX_BRW_SIZE) | |
1779 | data->ioc_plen1 = PTLRPC_MAX_BRW_SIZE; | |
1780 | ||
1781 | switch (test_mode) { | |
1782 | case 1: | |
1783 | /* fall through */ | |
1784 | case 2: | |
1785 | rc = echo_client_kbrw(ed, rw, oa, | |
1786 | eco, data->ioc_offset, | |
1787 | data->ioc_count, async, dummy_oti); | |
1788 | break; | |
1789 | case 3: | |
1790 | rc = echo_client_prep_commit(env, ec->ec_exp, rw, oa, | |
1791 | eco, data->ioc_offset, | |
1792 | data->ioc_count, data->ioc_plen1, | |
1793 | dummy_oti, async); | |
1794 | break; | |
1795 | default: | |
1796 | rc = -EINVAL; | |
1797 | } | |
1798 | echo_put_object(eco); | |
0a3bdb00 | 1799 | return rc; |
d7e09d03 PT |
1800 | } |
1801 | ||
1802 | static int | |
1803 | echo_client_enqueue(struct obd_export *exp, struct obdo *oa, | |
21aef7d9 | 1804 | int mode, u64 offset, u64 nob) |
d7e09d03 PT |
1805 | { |
1806 | struct echo_device *ed = obd2echo_dev(exp->exp_obd); | |
1807 | struct lustre_handle *ulh = &oa->o_handle; | |
1808 | struct echo_object *eco; | |
21aef7d9 | 1809 | u64 end; |
d7e09d03 | 1810 | int rc; |
d7e09d03 PT |
1811 | |
1812 | if (ed->ed_next == NULL) | |
0a3bdb00 | 1813 | return -EOPNOTSUPP; |
d7e09d03 PT |
1814 | |
1815 | if (!(mode == LCK_PR || mode == LCK_PW)) | |
0a3bdb00 | 1816 | return -EINVAL; |
d7e09d03 PT |
1817 | |
1818 | if ((offset & (~CFS_PAGE_MASK)) != 0 || | |
1819 | (nob & (~CFS_PAGE_MASK)) != 0) | |
0a3bdb00 | 1820 | return -EINVAL; |
d7e09d03 | 1821 | |
d841438a | 1822 | rc = echo_get_object(&eco, ed, oa); |
d7e09d03 | 1823 | if (rc != 0) |
0a3bdb00 | 1824 | return rc; |
d7e09d03 | 1825 | |
21aef7d9 | 1826 | end = (nob == 0) ? ((u64) -1) : (offset + nob - 1); |
d7e09d03 PT |
1827 | rc = cl_echo_enqueue(eco, offset, end, mode, &ulh->cookie); |
1828 | if (rc == 0) { | |
1829 | oa->o_valid |= OBD_MD_FLHANDLE; | |
55f5a824 | 1830 | CDEBUG(D_INFO, "Cookie is %#llx\n", ulh->cookie); |
d7e09d03 PT |
1831 | } |
1832 | echo_put_object(eco); | |
0a3bdb00 | 1833 | return rc; |
d7e09d03 PT |
1834 | } |
1835 | ||
1836 | static int | |
1837 | echo_client_cancel(struct obd_export *exp, struct obdo *oa) | |
1838 | { | |
1839 | struct echo_device *ed = obd2echo_dev(exp->exp_obd); | |
1840 | __u64 cookie = oa->o_handle.cookie; | |
1841 | ||
1842 | if ((oa->o_valid & OBD_MD_FLHANDLE) == 0) | |
1843 | return -EINVAL; | |
1844 | ||
55f5a824 | 1845 | CDEBUG(D_INFO, "Cookie is %#llx\n", cookie); |
d7e09d03 PT |
1846 | return cl_echo_cancel(ed, cookie); |
1847 | } | |
1848 | ||
1849 | static int | |
1850 | echo_client_iocontrol(unsigned int cmd, struct obd_export *exp, int len, | |
1851 | void *karg, void *uarg) | |
1852 | { | |
1853 | struct obd_device *obd = exp->exp_obd; | |
1854 | struct echo_device *ed = obd2echo_dev(obd); | |
1855 | struct echo_client_obd *ec = ed->ed_ec; | |
1856 | struct echo_object *eco; | |
1857 | struct obd_ioctl_data *data = karg; | |
1858 | struct obd_trans_info dummy_oti; | |
1859 | struct lu_env *env; | |
1860 | struct oti_req_ack_lock *ack_lock; | |
1861 | struct obdo *oa; | |
1862 | struct lu_fid fid; | |
1863 | int rw = OBD_BRW_READ; | |
1864 | int rc = 0; | |
1865 | int i; | |
d7e09d03 PT |
1866 | |
1867 | memset(&dummy_oti, 0, sizeof(dummy_oti)); | |
1868 | ||
1869 | oa = &data->ioc_obdo1; | |
1870 | if (!(oa->o_valid & OBD_MD_FLGROUP)) { | |
1871 | oa->o_valid |= OBD_MD_FLGROUP; | |
1872 | ostid_set_seq_echo(&oa->o_oi); | |
1873 | } | |
1874 | ||
1875 | /* This FID is unpacked just for validation at this point */ | |
1876 | rc = ostid_to_fid(&fid, &oa->o_oi, 0); | |
1877 | if (rc < 0) | |
0a3bdb00 | 1878 | return rc; |
d7e09d03 | 1879 | |
c5b89520 | 1880 | env = kzalloc(sizeof(*env), GFP_NOFS); |
efeb257d | 1881 | if (!env) |
0a3bdb00 | 1882 | return -ENOMEM; |
d7e09d03 PT |
1883 | |
1884 | rc = lu_env_init(env, LCT_DT_THREAD); | |
abb368ab JY |
1885 | if (rc) { |
1886 | rc = -ENOMEM; | |
1887 | goto out; | |
1888 | } | |
d7e09d03 PT |
1889 | |
1890 | switch (cmd) { | |
1891 | case OBD_IOC_CREATE: /* may create echo object */ | |
abb368ab JY |
1892 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1893 | rc = -EPERM; | |
1894 | goto out; | |
1895 | } | |
d7e09d03 PT |
1896 | |
1897 | rc = echo_create_object(env, ed, 1, oa, data->ioc_pbuf1, | |
1898 | data->ioc_plen1, &dummy_oti); | |
abb368ab | 1899 | goto out; |
d7e09d03 | 1900 | |
d7e09d03 | 1901 | case OBD_IOC_DESTROY: |
abb368ab JY |
1902 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1903 | rc = -EPERM; | |
1904 | goto out; | |
1905 | } | |
d7e09d03 PT |
1906 | |
1907 | rc = echo_get_object(&eco, ed, oa); | |
1908 | if (rc == 0) { | |
1909 | rc = obd_destroy(env, ec->ec_exp, oa, eco->eo_lsm, | |
1910 | &dummy_oti, NULL, NULL); | |
1911 | if (rc == 0) | |
1912 | eco->eo_deleted = 1; | |
1913 | echo_put_object(eco); | |
1914 | } | |
abb368ab | 1915 | goto out; |
d7e09d03 PT |
1916 | |
1917 | case OBD_IOC_GETATTR: | |
1918 | rc = echo_get_object(&eco, ed, oa); | |
1919 | if (rc == 0) { | |
1920 | struct obd_info oinfo = { { { 0 } } }; | |
ded9f908 | 1921 | |
d7e09d03 PT |
1922 | oinfo.oi_md = eco->eo_lsm; |
1923 | oinfo.oi_oa = oa; | |
1924 | rc = obd_getattr(env, ec->ec_exp, &oinfo); | |
1925 | echo_put_object(eco); | |
1926 | } | |
abb368ab | 1927 | goto out; |
d7e09d03 PT |
1928 | |
1929 | case OBD_IOC_SETATTR: | |
abb368ab JY |
1930 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1931 | rc = -EPERM; | |
1932 | goto out; | |
1933 | } | |
d7e09d03 PT |
1934 | |
1935 | rc = echo_get_object(&eco, ed, oa); | |
1936 | if (rc == 0) { | |
1937 | struct obd_info oinfo = { { { 0 } } }; | |
ded9f908 | 1938 | |
d7e09d03 PT |
1939 | oinfo.oi_oa = oa; |
1940 | oinfo.oi_md = eco->eo_lsm; | |
1941 | ||
1942 | rc = obd_setattr(env, ec->ec_exp, &oinfo, NULL); | |
1943 | echo_put_object(eco); | |
1944 | } | |
abb368ab | 1945 | goto out; |
d7e09d03 PT |
1946 | |
1947 | case OBD_IOC_BRW_WRITE: | |
abb368ab JY |
1948 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1949 | rc = -EPERM; | |
1950 | goto out; | |
1951 | } | |
d7e09d03 PT |
1952 | |
1953 | rw = OBD_BRW_WRITE; | |
1954 | /* fall through */ | |
1955 | case OBD_IOC_BRW_READ: | |
1956 | rc = echo_client_brw_ioctl(env, rw, exp, data, &dummy_oti); | |
abb368ab | 1957 | goto out; |
d7e09d03 PT |
1958 | |
1959 | case ECHO_IOC_GET_STRIPE: | |
1960 | rc = echo_get_object(&eco, ed, oa); | |
1961 | if (rc == 0) { | |
1962 | rc = echo_copyout_lsm(eco->eo_lsm, data->ioc_pbuf1, | |
1963 | data->ioc_plen1); | |
1964 | echo_put_object(eco); | |
1965 | } | |
abb368ab | 1966 | goto out; |
d7e09d03 PT |
1967 | |
1968 | case ECHO_IOC_SET_STRIPE: | |
abb368ab JY |
1969 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1970 | rc = -EPERM; | |
1971 | goto out; | |
1972 | } | |
d7e09d03 PT |
1973 | |
1974 | if (data->ioc_pbuf1 == NULL) { /* unset */ | |
1975 | rc = echo_get_object(&eco, ed, oa); | |
1976 | if (rc == 0) { | |
1977 | eco->eo_deleted = 1; | |
1978 | echo_put_object(eco); | |
1979 | } | |
1980 | } else { | |
1981 | rc = echo_create_object(env, ed, 0, oa, | |
1982 | data->ioc_pbuf1, | |
1983 | data->ioc_plen1, &dummy_oti); | |
1984 | } | |
abb368ab | 1985 | goto out; |
d7e09d03 PT |
1986 | |
1987 | case ECHO_IOC_ENQUEUE: | |
abb368ab JY |
1988 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1989 | rc = -EPERM; | |
1990 | goto out; | |
1991 | } | |
d7e09d03 PT |
1992 | |
1993 | rc = echo_client_enqueue(exp, oa, | |
1994 | data->ioc_conn1, /* lock mode */ | |
1995 | data->ioc_offset, | |
1996 | data->ioc_count);/*extent*/ | |
abb368ab | 1997 | goto out; |
d7e09d03 PT |
1998 | |
1999 | case ECHO_IOC_CANCEL: | |
2000 | rc = echo_client_cancel(exp, oa); | |
abb368ab | 2001 | goto out; |
d7e09d03 PT |
2002 | |
2003 | default: | |
d841438a | 2004 | CERROR("echo_ioctl(): unrecognised ioctl %#x\n", cmd); |
abb368ab JY |
2005 | rc = -ENOTTY; |
2006 | goto out; | |
d7e09d03 PT |
2007 | } |
2008 | ||
d7e09d03 PT |
2009 | out: |
2010 | lu_env_fini(env); | |
c5b89520 | 2011 | kfree(env); |
d7e09d03 PT |
2012 | |
2013 | /* XXX this should be in a helper also called by target_send_reply */ | |
2014 | for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4; | |
2015 | i++, ack_lock++) { | |
2016 | if (!ack_lock->mode) | |
2017 | break; | |
2018 | ldlm_lock_decref(&ack_lock->lock, ack_lock->mode); | |
2019 | } | |
2020 | ||
2021 | return rc; | |
2022 | } | |
2023 | ||
2024 | static int echo_client_setup(const struct lu_env *env, | |
2025 | struct obd_device *obddev, struct lustre_cfg *lcfg) | |
2026 | { | |
2027 | struct echo_client_obd *ec = &obddev->u.echo_client; | |
2028 | struct obd_device *tgt; | |
2029 | struct obd_uuid echo_uuid = { "ECHO_UUID" }; | |
2030 | struct obd_connect_data *ocd = NULL; | |
2031 | int rc; | |
d7e09d03 PT |
2032 | |
2033 | if (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) { | |
2034 | CERROR("requires a TARGET OBD name\n"); | |
0a3bdb00 | 2035 | return -EINVAL; |
d7e09d03 PT |
2036 | } |
2037 | ||
2038 | tgt = class_name2obd(lustre_cfg_string(lcfg, 1)); | |
2039 | if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) { | |
2040 | CERROR("device not attached or not set up (%s)\n", | |
2041 | lustre_cfg_string(lcfg, 1)); | |
0a3bdb00 | 2042 | return -EINVAL; |
d7e09d03 PT |
2043 | } |
2044 | ||
2045 | spin_lock_init(&ec->ec_lock); | |
d841438a YT |
2046 | INIT_LIST_HEAD(&ec->ec_objects); |
2047 | INIT_LIST_HEAD(&ec->ec_locks); | |
d7e09d03 PT |
2048 | ec->ec_unique = 0; |
2049 | ec->ec_nstripes = 0; | |
2050 | ||
c5b89520 | 2051 | ocd = kzalloc(sizeof(*ocd), GFP_NOFS); |
efeb257d | 2052 | if (!ocd) { |
d7e09d03 PT |
2053 | CERROR("Can't alloc ocd connecting to %s\n", |
2054 | lustre_cfg_string(lcfg, 1)); | |
2055 | return -ENOMEM; | |
2056 | } | |
2057 | ||
2058 | ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_REQPORTAL | | |
2059 | OBD_CONNECT_BRW_SIZE | | |
2060 | OBD_CONNECT_GRANT | OBD_CONNECT_FULL20 | | |
3b2f75fd | 2061 | OBD_CONNECT_64BITHASH | OBD_CONNECT_LVB_TYPE | |
2062 | OBD_CONNECT_FID; | |
d7e09d03 PT |
2063 | ocd->ocd_brw_size = DT_MAX_BRW_SIZE; |
2064 | ocd->ocd_version = LUSTRE_VERSION_CODE; | |
2065 | ocd->ocd_group = FID_SEQ_ECHO; | |
2066 | ||
2067 | rc = obd_connect(env, &ec->ec_exp, tgt, &echo_uuid, ocd, NULL); | |
2068 | if (rc == 0) { | |
2069 | /* Turn off pinger because it connects to tgt obd directly. */ | |
2070 | spin_lock(&tgt->obd_dev_lock); | |
2071 | list_del_init(&ec->ec_exp->exp_obd_chain_timed); | |
2072 | spin_unlock(&tgt->obd_dev_lock); | |
2073 | } | |
2074 | ||
c5b89520 | 2075 | kfree(ocd); |
d7e09d03 PT |
2076 | |
2077 | if (rc != 0) { | |
2078 | CERROR("fail to connect to device %s\n", | |
2079 | lustre_cfg_string(lcfg, 1)); | |
fbe7c6c7 | 2080 | return rc; |
d7e09d03 PT |
2081 | } |
2082 | ||
0a3bdb00 | 2083 | return rc; |
d7e09d03 PT |
2084 | } |
2085 | ||
2086 | static int echo_client_cleanup(struct obd_device *obddev) | |
2087 | { | |
d7e09d03 PT |
2088 | struct echo_client_obd *ec = &obddev->u.echo_client; |
2089 | int rc; | |
d7e09d03 | 2090 | |
d7e09d03 PT |
2091 | if (!list_empty(&obddev->obd_exports)) { |
2092 | CERROR("still has clients!\n"); | |
0a3bdb00 | 2093 | return -EBUSY; |
d7e09d03 PT |
2094 | } |
2095 | ||
2096 | LASSERT(atomic_read(&ec->ec_exp->exp_refcount) > 0); | |
2097 | rc = obd_disconnect(ec->ec_exp); | |
2098 | if (rc != 0) | |
2099 | CERROR("fail to disconnect device: %d\n", rc); | |
2100 | ||
0a3bdb00 | 2101 | return rc; |
d7e09d03 PT |
2102 | } |
2103 | ||
2104 | static int echo_client_connect(const struct lu_env *env, | |
2105 | struct obd_export **exp, | |
2106 | struct obd_device *src, struct obd_uuid *cluuid, | |
2107 | struct obd_connect_data *data, void *localdata) | |
2108 | { | |
2109 | int rc; | |
2110 | struct lustre_handle conn = { 0 }; | |
2111 | ||
d7e09d03 PT |
2112 | rc = class_connect(&conn, src, cluuid); |
2113 | if (rc == 0) { | |
2114 | *exp = class_conn2export(&conn); | |
2115 | } | |
2116 | ||
0a3bdb00 | 2117 | return rc; |
d7e09d03 PT |
2118 | } |
2119 | ||
2120 | static int echo_client_disconnect(struct obd_export *exp) | |
2121 | { | |
d7e09d03 | 2122 | int rc; |
d7e09d03 | 2123 | |
abb368ab JY |
2124 | if (exp == NULL) { |
2125 | rc = -EINVAL; | |
2126 | goto out; | |
2127 | } | |
d7e09d03 | 2128 | |
d7e09d03 | 2129 | rc = class_disconnect(exp); |
abb368ab | 2130 | goto out; |
d7e09d03 PT |
2131 | out: |
2132 | return rc; | |
2133 | } | |
2134 | ||
2135 | static struct obd_ops echo_client_obd_ops = { | |
2136 | .o_owner = THIS_MODULE, | |
d7e09d03 PT |
2137 | .o_iocontrol = echo_client_iocontrol, |
2138 | .o_connect = echo_client_connect, | |
2139 | .o_disconnect = echo_client_disconnect | |
2140 | }; | |
2141 | ||
5b34cd29 | 2142 | static int echo_client_init(void) |
d7e09d03 | 2143 | { |
d7e09d03 PT |
2144 | int rc; |
2145 | ||
d7e09d03 PT |
2146 | rc = lu_kmem_init(echo_caches); |
2147 | if (rc == 0) { | |
2148 | rc = class_register_type(&echo_client_obd_ops, NULL, | |
d7e09d03 PT |
2149 | LUSTRE_ECHO_CLIENT_NAME, |
2150 | &echo_device_type); | |
2151 | if (rc) | |
2152 | lu_kmem_fini(echo_caches); | |
2153 | } | |
2154 | return rc; | |
2155 | } | |
2156 | ||
5b34cd29 | 2157 | static void echo_client_exit(void) |
d7e09d03 PT |
2158 | { |
2159 | class_unregister_type(LUSTRE_ECHO_CLIENT_NAME); | |
2160 | lu_kmem_fini(echo_caches); | |
2161 | } | |
2162 | ||
2163 | static int __init obdecho_init(void) | |
2164 | { | |
d7e09d03 PT |
2165 | LCONSOLE_INFO("Echo OBD driver; http://www.lustre.org/\n"); |
2166 | ||
2167 | LASSERT(PAGE_CACHE_SIZE % OBD_ECHO_BLOCK_SIZE == 0); | |
2168 | ||
d9518b76 | 2169 | return echo_client_init(); |
d7e09d03 PT |
2170 | } |
2171 | ||
2172 | static void /*__exit*/ obdecho_exit(void) | |
2173 | { | |
2174 | echo_client_exit(); | |
2175 | ||
2176 | } | |
2177 | ||
2178 | MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); | |
2179 | MODULE_DESCRIPTION("Lustre Testing Echo OBD driver"); | |
2180 | MODULE_LICENSE("GPL"); | |
6960736c | 2181 | MODULE_VERSION(LUSTRE_VERSION_STRING); |
d7e09d03 | 2182 | |
6960736c GKH |
2183 | module_init(obdecho_init); |
2184 | module_exit(obdecho_exit); | |
d7e09d03 PT |
2185 | |
2186 | /** @} echo_client */ |