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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 | ||
d7e09d03 PT |
101 | /** \defgroup echo_helpers Helper functions |
102 | * @{ | |
103 | */ | |
104 | static inline struct echo_device *cl2echo_dev(const struct cl_device *dev) | |
105 | { | |
106 | return container_of0(dev, struct echo_device, ed_cl); | |
107 | } | |
108 | ||
109 | static inline struct cl_device *echo_dev2cl(struct echo_device *d) | |
110 | { | |
111 | return &d->ed_cl; | |
112 | } | |
113 | ||
114 | static inline struct echo_device *obd2echo_dev(const struct obd_device *obd) | |
115 | { | |
116 | return cl2echo_dev(lu2cl_dev(obd->obd_lu_dev)); | |
117 | } | |
118 | ||
119 | static inline struct cl_object *echo_obj2cl(struct echo_object *eco) | |
120 | { | |
121 | return &eco->eo_cl; | |
122 | } | |
123 | ||
124 | static inline struct echo_object *cl2echo_obj(const struct cl_object *o) | |
125 | { | |
126 | return container_of(o, struct echo_object, eo_cl); | |
127 | } | |
128 | ||
129 | static inline struct echo_page *cl2echo_page(const struct cl_page_slice *s) | |
130 | { | |
131 | return container_of(s, struct echo_page, ep_cl); | |
132 | } | |
133 | ||
134 | static inline struct echo_lock *cl2echo_lock(const struct cl_lock_slice *s) | |
135 | { | |
136 | return container_of(s, struct echo_lock, el_cl); | |
137 | } | |
138 | ||
139 | static inline struct cl_lock *echo_lock2cl(const struct echo_lock *ecl) | |
140 | { | |
141 | return ecl->el_cl.cls_lock; | |
142 | } | |
143 | ||
144 | static struct lu_context_key echo_thread_key; | |
145 | static inline struct echo_thread_info *echo_env_info(const struct lu_env *env) | |
146 | { | |
147 | struct echo_thread_info *info; | |
ded9f908 | 148 | |
d7e09d03 PT |
149 | info = lu_context_key_get(&env->le_ctx, &echo_thread_key); |
150 | LASSERT(info != NULL); | |
151 | return info; | |
152 | } | |
153 | ||
154 | static inline | |
155 | struct echo_object_conf *cl2echo_conf(const struct cl_object_conf *c) | |
156 | { | |
157 | return container_of(c, struct echo_object_conf, eoc_cl); | |
158 | } | |
159 | ||
160 | /** @} echo_helpers */ | |
161 | ||
162 | static struct echo_object *cl_echo_object_find(struct echo_device *d, | |
163 | struct lov_stripe_md **lsm); | |
164 | static int cl_echo_object_put(struct echo_object *eco); | |
21aef7d9 OD |
165 | static int cl_echo_enqueue(struct echo_object *eco, u64 start, |
166 | u64 end, int mode, __u64 *cookie); | |
167 | static int cl_echo_cancel(struct echo_device *d, __u64 cookie); | |
168 | static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset, | |
d7e09d03 PT |
169 | struct page **pages, int npages, int async); |
170 | ||
171 | static struct echo_thread_info *echo_env_info(const struct lu_env *env); | |
172 | ||
173 | struct echo_thread_info { | |
174 | struct echo_object_conf eti_conf; | |
175 | struct lustre_md eti_md; | |
176 | ||
177 | struct cl_2queue eti_queue; | |
178 | struct cl_io eti_io; | |
179 | struct cl_lock_descr eti_descr; | |
180 | struct lu_fid eti_fid; | |
181 | struct lu_fid eti_fid2; | |
d7e09d03 PT |
182 | }; |
183 | ||
184 | /* No session used right now */ | |
185 | struct echo_session_info { | |
186 | unsigned long dummy; | |
187 | }; | |
188 | ||
189 | static struct kmem_cache *echo_lock_kmem; | |
190 | static struct kmem_cache *echo_object_kmem; | |
191 | static struct kmem_cache *echo_thread_kmem; | |
192 | static struct kmem_cache *echo_session_kmem; | |
d7e09d03 PT |
193 | |
194 | static struct lu_kmem_descr echo_caches[] = { | |
195 | { | |
196 | .ckd_cache = &echo_lock_kmem, | |
197 | .ckd_name = "echo_lock_kmem", | |
cb7e9f7b | 198 | .ckd_size = sizeof(struct echo_lock) |
d7e09d03 PT |
199 | }, |
200 | { | |
201 | .ckd_cache = &echo_object_kmem, | |
202 | .ckd_name = "echo_object_kmem", | |
cb7e9f7b | 203 | .ckd_size = sizeof(struct echo_object) |
d7e09d03 PT |
204 | }, |
205 | { | |
206 | .ckd_cache = &echo_thread_kmem, | |
207 | .ckd_name = "echo_thread_kmem", | |
cb7e9f7b | 208 | .ckd_size = sizeof(struct echo_thread_info) |
d7e09d03 PT |
209 | }, |
210 | { | |
211 | .ckd_cache = &echo_session_kmem, | |
212 | .ckd_name = "echo_session_kmem", | |
cb7e9f7b | 213 | .ckd_size = sizeof(struct echo_session_info) |
d7e09d03 | 214 | }, |
d7e09d03 PT |
215 | { |
216 | .ckd_cache = NULL | |
217 | } | |
218 | }; | |
219 | ||
220 | /** \defgroup echo_page Page operations | |
221 | * | |
222 | * Echo page operations. | |
223 | * | |
224 | * @{ | |
225 | */ | |
226 | static struct page *echo_page_vmpage(const struct lu_env *env, | |
227 | const struct cl_page_slice *slice) | |
228 | { | |
229 | return cl2echo_page(slice)->ep_vmpage; | |
230 | } | |
231 | ||
232 | static int echo_page_own(const struct lu_env *env, | |
233 | const struct cl_page_slice *slice, | |
234 | struct cl_io *io, int nonblock) | |
235 | { | |
236 | struct echo_page *ep = cl2echo_page(slice); | |
237 | ||
238 | if (!nonblock) | |
239 | mutex_lock(&ep->ep_lock); | |
240 | else if (!mutex_trylock(&ep->ep_lock)) | |
241 | return -EAGAIN; | |
242 | return 0; | |
243 | } | |
244 | ||
245 | static void echo_page_disown(const struct lu_env *env, | |
246 | const struct cl_page_slice *slice, | |
247 | struct cl_io *io) | |
248 | { | |
249 | struct echo_page *ep = cl2echo_page(slice); | |
250 | ||
251 | LASSERT(mutex_is_locked(&ep->ep_lock)); | |
252 | mutex_unlock(&ep->ep_lock); | |
253 | } | |
254 | ||
255 | static void echo_page_discard(const struct lu_env *env, | |
256 | const struct cl_page_slice *slice, | |
257 | struct cl_io *unused) | |
258 | { | |
259 | cl_page_delete(env, slice->cpl_page); | |
260 | } | |
261 | ||
262 | static int echo_page_is_vmlocked(const struct lu_env *env, | |
263 | const struct cl_page_slice *slice) | |
264 | { | |
265 | if (mutex_is_locked(&cl2echo_page(slice)->ep_lock)) | |
266 | return -EBUSY; | |
267 | return -ENODATA; | |
268 | } | |
269 | ||
270 | static void echo_page_completion(const struct lu_env *env, | |
271 | const struct cl_page_slice *slice, | |
272 | int ioret) | |
273 | { | |
274 | LASSERT(slice->cpl_page->cp_sync_io != NULL); | |
275 | } | |
276 | ||
277 | static void echo_page_fini(const struct lu_env *env, | |
278 | struct cl_page_slice *slice) | |
279 | { | |
280 | struct echo_page *ep = cl2echo_page(slice); | |
281 | struct echo_object *eco = cl2echo_obj(slice->cpl_obj); | |
282 | struct page *vmpage = ep->ep_vmpage; | |
d7e09d03 PT |
283 | |
284 | atomic_dec(&eco->eo_npages); | |
285 | page_cache_release(vmpage); | |
d7e09d03 PT |
286 | } |
287 | ||
288 | static int echo_page_prep(const struct lu_env *env, | |
289 | const struct cl_page_slice *slice, | |
290 | struct cl_io *unused) | |
291 | { | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static int echo_page_print(const struct lu_env *env, | |
296 | const struct cl_page_slice *slice, | |
297 | void *cookie, lu_printer_t printer) | |
298 | { | |
299 | struct echo_page *ep = cl2echo_page(slice); | |
300 | ||
301 | (*printer)(env, cookie, LUSTRE_ECHO_CLIENT_NAME"-page@%p %d vm@%p\n", | |
302 | ep, mutex_is_locked(&ep->ep_lock), ep->ep_vmpage); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | static const struct cl_page_operations echo_page_ops = { | |
307 | .cpo_own = echo_page_own, | |
308 | .cpo_disown = echo_page_disown, | |
309 | .cpo_discard = echo_page_discard, | |
310 | .cpo_vmpage = echo_page_vmpage, | |
311 | .cpo_fini = echo_page_fini, | |
312 | .cpo_print = echo_page_print, | |
313 | .cpo_is_vmlocked = echo_page_is_vmlocked, | |
314 | .io = { | |
315 | [CRT_READ] = { | |
316 | .cpo_prep = echo_page_prep, | |
317 | .cpo_completion = echo_page_completion, | |
318 | }, | |
319 | [CRT_WRITE] = { | |
320 | .cpo_prep = echo_page_prep, | |
321 | .cpo_completion = echo_page_completion, | |
322 | } | |
323 | } | |
324 | }; | |
c9f6bb96 | 325 | |
d7e09d03 PT |
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)); | |
50d30362 | 340 | kmem_cache_free(echo_lock_kmem, ecl); |
d7e09d03 PT |
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 | |
ccaabce1 | 399 | el = kmem_cache_alloc(echo_lock_kmem, GFP_NOFS | __GFP_ZERO); |
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 | }; | |
c9f6bb96 | 421 | |
d7e09d03 PT |
422 | /** @} echo_cl_ops */ |
423 | ||
424 | /** \defgroup echo_lu_ops lu_object operations | |
425 | * | |
426 | * operations for echo lu object. | |
427 | * | |
428 | * @{ | |
429 | */ | |
430 | static int echo_object_init(const struct lu_env *env, struct lu_object *obj, | |
431 | const struct lu_object_conf *conf) | |
432 | { | |
433 | struct echo_device *ed = cl2echo_dev(lu2cl_dev(obj->lo_dev)); | |
434 | struct echo_client_obd *ec = ed->ed_ec; | |
435 | struct echo_object *eco = cl2echo_obj(lu2cl(obj)); | |
5bd07d99 PT |
436 | const struct cl_object_conf *cconf; |
437 | struct echo_object_conf *econf; | |
d7e09d03 PT |
438 | |
439 | if (ed->ed_next) { | |
440 | struct lu_object *below; | |
441 | struct lu_device *under; | |
442 | ||
443 | under = ed->ed_next; | |
444 | below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, | |
445 | under); | |
446 | if (below == NULL) | |
0a3bdb00 | 447 | return -ENOMEM; |
d7e09d03 PT |
448 | lu_object_add(obj, below); |
449 | } | |
450 | ||
5bd07d99 PT |
451 | cconf = lu2cl_conf(conf); |
452 | econf = cl2echo_conf(cconf); | |
d7e09d03 | 453 | |
5bd07d99 PT |
454 | LASSERT(econf->eoc_md); |
455 | eco->eo_lsm = *econf->eoc_md; | |
456 | /* clear the lsm pointer so that it won't get freed. */ | |
457 | *econf->eoc_md = NULL; | |
d7e09d03 PT |
458 | |
459 | eco->eo_dev = ed; | |
460 | atomic_set(&eco->eo_npages, 0); | |
461 | cl_object_page_init(lu2cl(obj), sizeof(struct echo_page)); | |
462 | ||
463 | spin_lock(&ec->ec_lock); | |
464 | list_add_tail(&eco->eo_obj_chain, &ec->ec_objects); | |
465 | spin_unlock(&ec->ec_lock); | |
466 | ||
0a3bdb00 | 467 | return 0; |
d7e09d03 PT |
468 | } |
469 | ||
470 | /* taken from osc_unpackmd() */ | |
471 | static int echo_alloc_memmd(struct echo_device *ed, | |
472 | struct lov_stripe_md **lsmp) | |
473 | { | |
474 | int lsm_size; | |
475 | ||
d7e09d03 PT |
476 | /* If export is lov/osc then use their obd method */ |
477 | if (ed->ed_next != NULL) | |
478 | return obd_alloc_memmd(ed->ed_ec->ec_exp, lsmp); | |
479 | /* OFD has no unpackmd method, do everything here */ | |
480 | lsm_size = lov_stripe_md_size(1); | |
481 | ||
482 | LASSERT(*lsmp == NULL); | |
c5b89520 | 483 | *lsmp = kzalloc(lsm_size, GFP_NOFS); |
efeb257d | 484 | if (!*lsmp) |
0a3bdb00 | 485 | return -ENOMEM; |
d7e09d03 | 486 | |
c5b89520 | 487 | (*lsmp)->lsm_oinfo[0] = kzalloc(sizeof(struct lov_oinfo), GFP_NOFS); |
efeb257d | 488 | if (!(*lsmp)->lsm_oinfo[0]) { |
c5b89520 | 489 | kfree(*lsmp); |
0a3bdb00 | 490 | return -ENOMEM; |
d7e09d03 PT |
491 | } |
492 | ||
493 | loi_init((*lsmp)->lsm_oinfo[0]); | |
494 | (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES; | |
495 | ostid_set_seq_echo(&(*lsmp)->lsm_oi); | |
496 | ||
0a3bdb00 | 497 | return lsm_size; |
d7e09d03 PT |
498 | } |
499 | ||
500 | static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp) | |
501 | { | |
502 | int lsm_size; | |
503 | ||
d7e09d03 PT |
504 | /* If export is lov/osc then use their obd method */ |
505 | if (ed->ed_next != NULL) | |
506 | return obd_free_memmd(ed->ed_ec->ec_exp, lsmp); | |
507 | /* OFD has no unpackmd method, do everything here */ | |
508 | lsm_size = lov_stripe_md_size(1); | |
509 | ||
510 | LASSERT(*lsmp != NULL); | |
c5b89520 JL |
511 | kfree((*lsmp)->lsm_oinfo[0]); |
512 | kfree(*lsmp); | |
d7e09d03 | 513 | *lsmp = NULL; |
0a3bdb00 | 514 | return 0; |
d7e09d03 PT |
515 | } |
516 | ||
517 | static void echo_object_free(const struct lu_env *env, struct lu_object *obj) | |
518 | { | |
519 | struct echo_object *eco = cl2echo_obj(lu2cl(obj)); | |
520 | struct echo_client_obd *ec = eco->eo_dev->ed_ec; | |
d7e09d03 PT |
521 | |
522 | LASSERT(atomic_read(&eco->eo_npages) == 0); | |
523 | ||
524 | spin_lock(&ec->ec_lock); | |
525 | list_del_init(&eco->eo_obj_chain); | |
526 | spin_unlock(&ec->ec_lock); | |
527 | ||
528 | lu_object_fini(obj); | |
529 | lu_object_header_fini(obj->lo_header); | |
530 | ||
531 | if (eco->eo_lsm) | |
532 | echo_free_memmd(eco->eo_dev, &eco->eo_lsm); | |
50d30362 | 533 | kmem_cache_free(echo_object_kmem, eco); |
d7e09d03 PT |
534 | } |
535 | ||
536 | static int echo_object_print(const struct lu_env *env, void *cookie, | |
537 | lu_printer_t p, const struct lu_object *o) | |
538 | { | |
539 | struct echo_object *obj = cl2echo_obj(lu2cl(o)); | |
540 | ||
541 | return (*p)(env, cookie, "echoclient-object@%p", obj); | |
542 | } | |
543 | ||
544 | static const struct lu_object_operations echo_lu_obj_ops = { | |
545 | .loo_object_init = echo_object_init, | |
546 | .loo_object_delete = NULL, | |
547 | .loo_object_release = NULL, | |
548 | .loo_object_free = echo_object_free, | |
549 | .loo_object_print = echo_object_print, | |
550 | .loo_object_invariant = NULL | |
551 | }; | |
c9f6bb96 | 552 | |
d7e09d03 PT |
553 | /** @} echo_lu_ops */ |
554 | ||
555 | /** \defgroup echo_lu_dev_ops lu_device operations | |
556 | * | |
557 | * Operations for echo lu device. | |
558 | * | |
559 | * @{ | |
560 | */ | |
561 | static struct lu_object *echo_object_alloc(const struct lu_env *env, | |
562 | const struct lu_object_header *hdr, | |
563 | struct lu_device *dev) | |
564 | { | |
565 | struct echo_object *eco; | |
566 | struct lu_object *obj = NULL; | |
d7e09d03 PT |
567 | |
568 | /* we're the top dev. */ | |
569 | LASSERT(hdr == NULL); | |
ccaabce1 | 570 | eco = kmem_cache_alloc(echo_object_kmem, GFP_NOFS | __GFP_ZERO); |
d7e09d03 PT |
571 | if (eco != NULL) { |
572 | struct cl_object_header *hdr = &eco->eo_hdr; | |
573 | ||
574 | obj = &echo_obj2cl(eco)->co_lu; | |
575 | cl_object_header_init(hdr); | |
576 | lu_object_init(obj, &hdr->coh_lu, dev); | |
577 | lu_object_add_top(&hdr->coh_lu, obj); | |
578 | ||
579 | eco->eo_cl.co_ops = &echo_cl_obj_ops; | |
580 | obj->lo_ops = &echo_lu_obj_ops; | |
581 | } | |
0a3bdb00 | 582 | return obj; |
d7e09d03 PT |
583 | } |
584 | ||
585 | static struct lu_device_operations echo_device_lu_ops = { | |
586 | .ldo_object_alloc = echo_object_alloc, | |
587 | }; | |
588 | ||
589 | /** @} echo_lu_dev_ops */ | |
590 | ||
591 | static struct cl_device_operations echo_device_cl_ops = { | |
592 | }; | |
593 | ||
594 | /** \defgroup echo_init Setup and teardown | |
595 | * | |
596 | * Init and fini functions for echo client. | |
597 | * | |
598 | * @{ | |
599 | */ | |
600 | static int echo_site_init(const struct lu_env *env, struct echo_device *ed) | |
601 | { | |
602 | struct cl_site *site = &ed->ed_site_myself; | |
603 | int rc; | |
604 | ||
605 | /* initialize site */ | |
606 | rc = cl_site_init(site, &ed->ed_cl); | |
607 | if (rc) { | |
c4f39553 | 608 | CERROR("Cannot initialize site for echo client(%d)\n", rc); |
d7e09d03 PT |
609 | return rc; |
610 | } | |
611 | ||
612 | rc = lu_site_init_finish(&site->cs_lu); | |
613 | if (rc) | |
614 | return rc; | |
615 | ||
616 | ed->ed_site = site; | |
617 | return 0; | |
618 | } | |
619 | ||
620 | static void echo_site_fini(const struct lu_env *env, struct echo_device *ed) | |
621 | { | |
622 | if (ed->ed_site) { | |
5bd07d99 | 623 | cl_site_fini(ed->ed_site); |
d7e09d03 PT |
624 | ed->ed_site = NULL; |
625 | } | |
626 | } | |
627 | ||
628 | static void *echo_thread_key_init(const struct lu_context *ctx, | |
629 | struct lu_context_key *key) | |
630 | { | |
631 | struct echo_thread_info *info; | |
632 | ||
ccaabce1 | 633 | info = kmem_cache_alloc(echo_thread_kmem, GFP_NOFS | __GFP_ZERO); |
d7e09d03 PT |
634 | if (info == NULL) |
635 | info = ERR_PTR(-ENOMEM); | |
636 | return info; | |
637 | } | |
638 | ||
639 | static void echo_thread_key_fini(const struct lu_context *ctx, | |
640 | struct lu_context_key *key, void *data) | |
641 | { | |
642 | struct echo_thread_info *info = data; | |
ded9f908 | 643 | |
50d30362 | 644 | kmem_cache_free(echo_thread_kmem, info); |
d7e09d03 PT |
645 | } |
646 | ||
647 | static void echo_thread_key_exit(const struct lu_context *ctx, | |
648 | struct lu_context_key *key, void *data) | |
649 | { | |
650 | } | |
651 | ||
652 | static struct lu_context_key echo_thread_key = { | |
653 | .lct_tags = LCT_CL_THREAD, | |
654 | .lct_init = echo_thread_key_init, | |
655 | .lct_fini = echo_thread_key_fini, | |
656 | .lct_exit = echo_thread_key_exit | |
657 | }; | |
658 | ||
659 | static void *echo_session_key_init(const struct lu_context *ctx, | |
660 | struct lu_context_key *key) | |
661 | { | |
662 | struct echo_session_info *session; | |
663 | ||
ccaabce1 | 664 | session = kmem_cache_alloc(echo_session_kmem, GFP_NOFS | __GFP_ZERO); |
d7e09d03 PT |
665 | if (session == NULL) |
666 | session = ERR_PTR(-ENOMEM); | |
667 | return session; | |
668 | } | |
669 | ||
670 | static void echo_session_key_fini(const struct lu_context *ctx, | |
671 | struct lu_context_key *key, void *data) | |
672 | { | |
673 | struct echo_session_info *session = data; | |
ded9f908 | 674 | |
50d30362 | 675 | kmem_cache_free(echo_session_kmem, session); |
d7e09d03 PT |
676 | } |
677 | ||
678 | static void echo_session_key_exit(const struct lu_context *ctx, | |
679 | struct lu_context_key *key, void *data) | |
680 | { | |
681 | } | |
682 | ||
683 | static struct lu_context_key echo_session_key = { | |
684 | .lct_tags = LCT_SESSION, | |
685 | .lct_init = echo_session_key_init, | |
686 | .lct_fini = echo_session_key_fini, | |
687 | .lct_exit = echo_session_key_exit | |
688 | }; | |
689 | ||
690 | LU_TYPE_INIT_FINI(echo, &echo_thread_key, &echo_session_key); | |
691 | ||
d7e09d03 PT |
692 | static struct lu_device *echo_device_alloc(const struct lu_env *env, |
693 | struct lu_device_type *t, | |
694 | struct lustre_cfg *cfg) | |
695 | { | |
696 | struct lu_device *next; | |
697 | struct echo_device *ed; | |
698 | struct cl_device *cd; | |
699 | struct obd_device *obd = NULL; /* to keep compiler happy */ | |
700 | struct obd_device *tgt; | |
701 | const char *tgt_type_name; | |
702 | int rc; | |
703 | int cleanup = 0; | |
d7e09d03 | 704 | |
c5b89520 | 705 | ed = kzalloc(sizeof(*ed), GFP_NOFS); |
efeb257d | 706 | if (!ed) { |
abb368ab JY |
707 | rc = -ENOMEM; |
708 | goto out; | |
709 | } | |
d7e09d03 PT |
710 | |
711 | cleanup = 1; | |
712 | cd = &ed->ed_cl; | |
713 | rc = cl_device_init(cd, t); | |
714 | if (rc) | |
abb368ab | 715 | goto out; |
d7e09d03 PT |
716 | |
717 | cd->cd_lu_dev.ld_ops = &echo_device_lu_ops; | |
718 | cd->cd_ops = &echo_device_cl_ops; | |
719 | ||
720 | cleanup = 2; | |
721 | obd = class_name2obd(lustre_cfg_string(cfg, 0)); | |
722 | LASSERT(obd != NULL); | |
723 | LASSERT(env != NULL); | |
724 | ||
725 | tgt = class_name2obd(lustre_cfg_string(cfg, 1)); | |
726 | if (tgt == NULL) { | |
727 | CERROR("Can not find tgt device %s\n", | |
728 | lustre_cfg_string(cfg, 1)); | |
abb368ab JY |
729 | rc = -ENODEV; |
730 | goto out; | |
d7e09d03 PT |
731 | } |
732 | ||
733 | next = tgt->obd_lu_dev; | |
734 | if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) { | |
5bd07d99 | 735 | CERROR("echo MDT client must be run on server\n"); |
abb368ab JY |
736 | rc = -EOPNOTSUPP; |
737 | goto out; | |
d7e09d03 | 738 | } |
5bd07d99 PT |
739 | |
740 | rc = echo_site_init(env, ed); | |
741 | if (rc) | |
abb368ab | 742 | goto out; |
5bd07d99 | 743 | |
d7e09d03 PT |
744 | cleanup = 3; |
745 | ||
746 | rc = echo_client_setup(env, obd, cfg); | |
747 | if (rc) | |
abb368ab | 748 | goto out; |
d7e09d03 PT |
749 | |
750 | ed->ed_ec = &obd->u.echo_client; | |
751 | cleanup = 4; | |
752 | ||
5bd07d99 PT |
753 | /* if echo client is to be stacked upon ost device, the next is |
754 | * NULL since ost is not a clio device so far */ | |
755 | if (next != NULL && !lu_device_is_cl(next)) | |
756 | next = NULL; | |
757 | ||
758 | tgt_type_name = tgt->obd_type->typ_name; | |
759 | if (next != NULL) { | |
760 | LASSERT(next != NULL); | |
abb368ab JY |
761 | if (next->ld_site != NULL) { |
762 | rc = -EBUSY; | |
763 | goto out; | |
764 | } | |
5bd07d99 PT |
765 | |
766 | next->ld_site = &ed->ed_site->cs_lu; | |
767 | rc = next->ld_type->ldt_ops->ldto_device_init(env, next, | |
768 | next->ld_type->ldt_name, | |
769 | NULL); | |
770 | if (rc) | |
abb368ab | 771 | goto out; |
5bd07d99 PT |
772 | |
773 | /* Tricky case, I have to determine the obd type since | |
774 | * CLIO uses the different parameters to initialize | |
775 | * objects for lov & osc. */ | |
776 | if (strcmp(tgt_type_name, LUSTRE_LOV_NAME) == 0) | |
777 | ed->ed_next_islov = 1; | |
778 | else | |
779 | LASSERT(strcmp(tgt_type_name, | |
780 | LUSTRE_OSC_NAME) == 0); | |
d7e09d03 | 781 | } else { |
5bd07d99 | 782 | LASSERT(strcmp(tgt_type_name, LUSTRE_OST_NAME) == 0); |
d7e09d03 PT |
783 | } |
784 | ||
785 | ed->ed_next = next; | |
0a3bdb00 | 786 | return &cd->cd_lu_dev; |
d7e09d03 | 787 | out: |
a58a38ac | 788 | switch (cleanup) { |
d7e09d03 PT |
789 | case 4: { |
790 | int rc2; | |
ded9f908 | 791 | |
d7e09d03 PT |
792 | rc2 = echo_client_cleanup(obd); |
793 | if (rc2) | |
794 | CERROR("Cleanup obd device %s error(%d)\n", | |
795 | obd->obd_name, rc2); | |
796 | } | |
797 | ||
798 | case 3: | |
799 | echo_site_fini(env, ed); | |
800 | case 2: | |
801 | cl_device_fini(&ed->ed_cl); | |
802 | case 1: | |
c5b89520 | 803 | kfree(ed); |
d7e09d03 PT |
804 | case 0: |
805 | default: | |
806 | break; | |
807 | } | |
fbe7c6c7 | 808 | return ERR_PTR(rc); |
d7e09d03 PT |
809 | } |
810 | ||
811 | static int echo_device_init(const struct lu_env *env, struct lu_device *d, | |
812 | const char *name, struct lu_device *next) | |
813 | { | |
814 | LBUG(); | |
815 | return 0; | |
816 | } | |
817 | ||
818 | static struct lu_device *echo_device_fini(const struct lu_env *env, | |
819 | struct lu_device *d) | |
820 | { | |
821 | struct echo_device *ed = cl2echo_dev(lu2cl_dev(d)); | |
822 | struct lu_device *next = ed->ed_next; | |
823 | ||
5bd07d99 | 824 | while (next) |
d7e09d03 PT |
825 | next = next->ld_type->ldt_ops->ldto_device_fini(env, next); |
826 | return NULL; | |
827 | } | |
828 | ||
829 | static void echo_lock_release(const struct lu_env *env, | |
830 | struct echo_lock *ecl, | |
831 | int still_used) | |
832 | { | |
833 | struct cl_lock *clk = echo_lock2cl(ecl); | |
834 | ||
835 | cl_lock_get(clk); | |
836 | cl_unuse(env, clk); | |
837 | cl_lock_release(env, clk, "ec enqueue", ecl->el_object); | |
838 | if (!still_used) { | |
839 | cl_lock_mutex_get(env, clk); | |
840 | cl_lock_cancel(env, clk); | |
841 | cl_lock_delete(env, clk); | |
842 | cl_lock_mutex_put(env, clk); | |
843 | } | |
844 | cl_lock_put(env, clk); | |
845 | } | |
846 | ||
847 | static struct lu_device *echo_device_free(const struct lu_env *env, | |
848 | struct lu_device *d) | |
849 | { | |
850 | struct echo_device *ed = cl2echo_dev(lu2cl_dev(d)); | |
851 | struct echo_client_obd *ec = ed->ed_ec; | |
852 | struct echo_object *eco; | |
853 | struct lu_device *next = ed->ed_next; | |
854 | ||
855 | CDEBUG(D_INFO, "echo device:%p is going to be freed, next = %p\n", | |
856 | ed, next); | |
857 | ||
858 | lu_site_purge(env, &ed->ed_site->cs_lu, -1); | |
859 | ||
860 | /* check if there are objects still alive. | |
861 | * It shouldn't have any object because lu_site_purge would cleanup | |
862 | * all of cached objects. Anyway, probably the echo device is being | |
863 | * parallelly accessed. | |
864 | */ | |
865 | spin_lock(&ec->ec_lock); | |
866 | list_for_each_entry(eco, &ec->ec_objects, eo_obj_chain) | |
867 | eco->eo_deleted = 1; | |
868 | spin_unlock(&ec->ec_lock); | |
869 | ||
870 | /* purge again */ | |
871 | lu_site_purge(env, &ed->ed_site->cs_lu, -1); | |
872 | ||
873 | CDEBUG(D_INFO, | |
874 | "Waiting for the reference of echo object to be dropped\n"); | |
875 | ||
876 | /* Wait for the last reference to be dropped. */ | |
877 | spin_lock(&ec->ec_lock); | |
878 | while (!list_empty(&ec->ec_objects)) { | |
879 | spin_unlock(&ec->ec_lock); | |
2d00bd17 | 880 | CERROR("echo_client still has objects at cleanup time, wait for 1 second\n"); |
18fd5baa PT |
881 | set_current_state(TASK_UNINTERRUPTIBLE); |
882 | schedule_timeout(cfs_time_seconds(1)); | |
d7e09d03 PT |
883 | lu_site_purge(env, &ed->ed_site->cs_lu, -1); |
884 | spin_lock(&ec->ec_lock); | |
885 | } | |
886 | spin_unlock(&ec->ec_lock); | |
887 | ||
888 | LASSERT(list_empty(&ec->ec_locks)); | |
889 | ||
890 | CDEBUG(D_INFO, "No object exists, exiting...\n"); | |
891 | ||
892 | echo_client_cleanup(d->ld_obd); | |
5bd07d99 PT |
893 | |
894 | while (next) | |
d7e09d03 PT |
895 | next = next->ld_type->ldt_ops->ldto_device_free(env, next); |
896 | ||
897 | LASSERT(ed->ed_site == lu2cl_site(d->ld_site)); | |
898 | echo_site_fini(env, ed); | |
899 | cl_device_fini(&ed->ed_cl); | |
c5b89520 | 900 | kfree(ed); |
d7e09d03 PT |
901 | |
902 | return NULL; | |
903 | } | |
904 | ||
905 | static const struct lu_device_type_operations echo_device_type_ops = { | |
906 | .ldto_init = echo_type_init, | |
907 | .ldto_fini = echo_type_fini, | |
908 | ||
909 | .ldto_start = echo_type_start, | |
910 | .ldto_stop = echo_type_stop, | |
911 | ||
912 | .ldto_device_alloc = echo_device_alloc, | |
913 | .ldto_device_free = echo_device_free, | |
914 | .ldto_device_init = echo_device_init, | |
915 | .ldto_device_fini = echo_device_fini | |
916 | }; | |
917 | ||
918 | static struct lu_device_type echo_device_type = { | |
919 | .ldt_tags = LU_DEVICE_CL, | |
920 | .ldt_name = LUSTRE_ECHO_CLIENT_NAME, | |
921 | .ldt_ops = &echo_device_type_ops, | |
5bd07d99 | 922 | .ldt_ctx_tags = LCT_CL_THREAD, |
d7e09d03 | 923 | }; |
c9f6bb96 | 924 | |
d7e09d03 PT |
925 | /** @} echo_init */ |
926 | ||
927 | /** \defgroup echo_exports Exported operations | |
928 | * | |
929 | * exporting functions to echo client | |
930 | * | |
931 | * @{ | |
932 | */ | |
933 | ||
934 | /* Interfaces to echo client obd device */ | |
935 | static struct echo_object *cl_echo_object_find(struct echo_device *d, | |
936 | struct lov_stripe_md **lsmp) | |
937 | { | |
938 | struct lu_env *env; | |
939 | struct echo_thread_info *info; | |
940 | struct echo_object_conf *conf; | |
941 | struct lov_stripe_md *lsm; | |
942 | struct echo_object *eco; | |
943 | struct cl_object *obj; | |
944 | struct lu_fid *fid; | |
945 | int refcheck; | |
946 | int rc; | |
d7e09d03 PT |
947 | |
948 | LASSERT(lsmp); | |
949 | lsm = *lsmp; | |
950 | LASSERT(lsm); | |
8f405503 | 951 | LASSERTF(ostid_id(&lsm->lsm_oi) != 0, DOSTID"\n", POSTID(&lsm->lsm_oi)); |
952 | LASSERTF(ostid_seq(&lsm->lsm_oi) == FID_SEQ_ECHO, DOSTID"\n", | |
953 | POSTID(&lsm->lsm_oi)); | |
d7e09d03 PT |
954 | |
955 | /* Never return an object if the obd is to be freed. */ | |
956 | if (echo_dev2cl(d)->cd_lu_dev.ld_obd->obd_stopping) | |
0a3bdb00 | 957 | return ERR_PTR(-ENODEV); |
d7e09d03 PT |
958 | |
959 | env = cl_env_get(&refcheck); | |
960 | if (IS_ERR(env)) | |
0a3bdb00 | 961 | return (void *)env; |
d7e09d03 PT |
962 | |
963 | info = echo_env_info(env); | |
964 | conf = &info->eti_conf; | |
965 | if (d->ed_next) { | |
966 | if (!d->ed_next_islov) { | |
967 | struct lov_oinfo *oinfo = lsm->lsm_oinfo[0]; | |
ded9f908 | 968 | |
d7e09d03 PT |
969 | LASSERT(oinfo != NULL); |
970 | oinfo->loi_oi = lsm->lsm_oi; | |
971 | conf->eoc_cl.u.coc_oinfo = oinfo; | |
972 | } else { | |
973 | struct lustre_md *md; | |
ded9f908 | 974 | |
d7e09d03 | 975 | md = &info->eti_md; |
ec83e611 | 976 | memset(md, 0, sizeof(*md)); |
d7e09d03 PT |
977 | md->lsm = lsm; |
978 | conf->eoc_cl.u.coc_md = md; | |
979 | } | |
980 | } | |
981 | conf->eoc_md = lsmp; | |
982 | ||
983 | fid = &info->eti_fid; | |
984 | rc = ostid_to_fid(fid, &lsm->lsm_oi, 0); | |
abb368ab JY |
985 | if (rc != 0) { |
986 | eco = ERR_PTR(rc); | |
987 | goto out; | |
988 | } | |
d7e09d03 PT |
989 | |
990 | /* In the function below, .hs_keycmp resolves to | |
991 | * lu_obj_hop_keycmp() */ | |
992 | /* coverity[overrun-buffer-val] */ | |
993 | obj = cl_object_find(env, echo_dev2cl(d), fid, &conf->eoc_cl); | |
abb368ab JY |
994 | if (IS_ERR(obj)) { |
995 | eco = (void *)obj; | |
996 | goto out; | |
997 | } | |
d7e09d03 PT |
998 | |
999 | eco = cl2echo_obj(obj); | |
1000 | if (eco->eo_deleted) { | |
1001 | cl_object_put(env, obj); | |
1002 | eco = ERR_PTR(-EAGAIN); | |
1003 | } | |
1004 | ||
1005 | out: | |
1006 | cl_env_put(env, &refcheck); | |
0a3bdb00 | 1007 | return eco; |
d7e09d03 PT |
1008 | } |
1009 | ||
1010 | static int cl_echo_object_put(struct echo_object *eco) | |
1011 | { | |
1012 | struct lu_env *env; | |
1013 | struct cl_object *obj = echo_obj2cl(eco); | |
1014 | int refcheck; | |
d7e09d03 PT |
1015 | |
1016 | env = cl_env_get(&refcheck); | |
1017 | if (IS_ERR(env)) | |
0a3bdb00 | 1018 | return PTR_ERR(env); |
d7e09d03 PT |
1019 | |
1020 | /* an external function to kill an object? */ | |
1021 | if (eco->eo_deleted) { | |
1022 | struct lu_object_header *loh = obj->co_lu.lo_header; | |
ded9f908 | 1023 | |
d7e09d03 PT |
1024 | LASSERT(&eco->eo_hdr == luh2coh(loh)); |
1025 | set_bit(LU_OBJECT_HEARD_BANSHEE, &loh->loh_flags); | |
1026 | } | |
1027 | ||
1028 | cl_object_put(env, obj); | |
1029 | cl_env_put(env, &refcheck); | |
0a3bdb00 | 1030 | return 0; |
d7e09d03 PT |
1031 | } |
1032 | ||
1033 | static int cl_echo_enqueue0(struct lu_env *env, struct echo_object *eco, | |
21aef7d9 | 1034 | u64 start, u64 end, int mode, |
d841438a | 1035 | __u64 *cookie, __u32 enqflags) |
d7e09d03 PT |
1036 | { |
1037 | struct cl_io *io; | |
1038 | struct cl_lock *lck; | |
1039 | struct cl_object *obj; | |
1040 | struct cl_lock_descr *descr; | |
1041 | struct echo_thread_info *info; | |
1042 | int rc = -ENOMEM; | |
d7e09d03 PT |
1043 | |
1044 | info = echo_env_info(env); | |
1045 | io = &info->eti_io; | |
1046 | descr = &info->eti_descr; | |
1047 | obj = echo_obj2cl(eco); | |
1048 | ||
1049 | descr->cld_obj = obj; | |
1050 | descr->cld_start = cl_index(obj, start); | |
1051 | descr->cld_end = cl_index(obj, end); | |
1052 | descr->cld_mode = mode == LCK_PW ? CLM_WRITE : CLM_READ; | |
1053 | descr->cld_enq_flags = enqflags; | |
1054 | io->ci_obj = obj; | |
1055 | ||
1056 | lck = cl_lock_request(env, io, descr, "ec enqueue", eco); | |
1057 | if (lck) { | |
1058 | struct echo_client_obd *ec = eco->eo_dev->ed_ec; | |
1059 | struct echo_lock *el; | |
1060 | ||
1061 | rc = cl_wait(env, lck); | |
1062 | if (rc == 0) { | |
1063 | el = cl2echo_lock(cl_lock_at(lck, &echo_device_type)); | |
1064 | spin_lock(&ec->ec_lock); | |
1065 | if (list_empty(&el->el_chain)) { | |
1066 | list_add(&el->el_chain, &ec->ec_locks); | |
1067 | el->el_cookie = ++ec->ec_unique; | |
1068 | } | |
1069 | atomic_inc(&el->el_refcount); | |
1070 | *cookie = el->el_cookie; | |
1071 | spin_unlock(&ec->ec_lock); | |
1072 | } else { | |
1073 | cl_lock_release(env, lck, "ec enqueue", current); | |
1074 | } | |
1075 | } | |
0a3bdb00 | 1076 | return rc; |
d7e09d03 PT |
1077 | } |
1078 | ||
21aef7d9 | 1079 | static int cl_echo_enqueue(struct echo_object *eco, u64 start, u64 end, |
d7e09d03 PT |
1080 | int mode, __u64 *cookie) |
1081 | { | |
1082 | struct echo_thread_info *info; | |
1083 | struct lu_env *env; | |
1084 | struct cl_io *io; | |
1085 | int refcheck; | |
1086 | int result; | |
d7e09d03 PT |
1087 | |
1088 | env = cl_env_get(&refcheck); | |
1089 | if (IS_ERR(env)) | |
0a3bdb00 | 1090 | return PTR_ERR(env); |
d7e09d03 PT |
1091 | |
1092 | info = echo_env_info(env); | |
1093 | io = &info->eti_io; | |
1094 | ||
1095 | io->ci_ignore_layout = 1; | |
1096 | result = cl_io_init(env, io, CIT_MISC, echo_obj2cl(eco)); | |
1097 | if (result < 0) | |
abb368ab | 1098 | goto out; |
d7e09d03 PT |
1099 | LASSERT(result == 0); |
1100 | ||
1101 | result = cl_echo_enqueue0(env, eco, start, end, mode, cookie, 0); | |
1102 | cl_io_fini(env, io); | |
1103 | ||
d7e09d03 PT |
1104 | out: |
1105 | cl_env_put(env, &refcheck); | |
1106 | return result; | |
1107 | } | |
1108 | ||
1109 | static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed, | |
1110 | __u64 cookie) | |
1111 | { | |
1112 | struct echo_client_obd *ec = ed->ed_ec; | |
1113 | struct echo_lock *ecl = NULL; | |
1114 | struct list_head *el; | |
1115 | int found = 0, still_used = 0; | |
d7e09d03 PT |
1116 | |
1117 | LASSERT(ec != NULL); | |
1118 | spin_lock(&ec->ec_lock); | |
cb7e9f7b DU |
1119 | list_for_each(el, &ec->ec_locks) { |
1120 | ecl = list_entry(el, struct echo_lock, el_chain); | |
55f5a824 | 1121 | CDEBUG(D_INFO, "ecl: %p, cookie: %#llx\n", ecl, ecl->el_cookie); |
d7e09d03 PT |
1122 | found = (ecl->el_cookie == cookie); |
1123 | if (found) { | |
1124 | if (atomic_dec_and_test(&ecl->el_refcount)) | |
1125 | list_del_init(&ecl->el_chain); | |
1126 | else | |
1127 | still_used = 1; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | spin_unlock(&ec->ec_lock); | |
1132 | ||
1133 | if (!found) | |
0a3bdb00 | 1134 | return -ENOENT; |
d7e09d03 PT |
1135 | |
1136 | echo_lock_release(env, ecl, still_used); | |
0a3bdb00 | 1137 | return 0; |
d7e09d03 PT |
1138 | } |
1139 | ||
1140 | static int cl_echo_cancel(struct echo_device *ed, __u64 cookie) | |
1141 | { | |
1142 | struct lu_env *env; | |
1143 | int refcheck; | |
1144 | int rc; | |
d7e09d03 PT |
1145 | |
1146 | env = cl_env_get(&refcheck); | |
1147 | if (IS_ERR(env)) | |
0a3bdb00 | 1148 | return PTR_ERR(env); |
d7e09d03 PT |
1149 | |
1150 | rc = cl_echo_cancel0(env, ed, cookie); | |
1151 | ||
1152 | cl_env_put(env, &refcheck); | |
0a3bdb00 | 1153 | return rc; |
d7e09d03 PT |
1154 | } |
1155 | ||
1156 | static int cl_echo_async_brw(const struct lu_env *env, struct cl_io *io, | |
1157 | enum cl_req_type unused, struct cl_2queue *queue) | |
1158 | { | |
1159 | struct cl_page *clp; | |
1160 | struct cl_page *temp; | |
1161 | int result = 0; | |
d7e09d03 PT |
1162 | |
1163 | cl_page_list_for_each_safe(clp, temp, &queue->c2_qin) { | |
1164 | int rc; | |
ded9f908 | 1165 | |
d7e09d03 PT |
1166 | rc = cl_page_cache_add(env, io, clp, CRT_WRITE); |
1167 | if (rc == 0) | |
1168 | continue; | |
1169 | result = result ?: rc; | |
1170 | } | |
0a3bdb00 | 1171 | return result; |
d7e09d03 PT |
1172 | } |
1173 | ||
21aef7d9 | 1174 | static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset, |
d7e09d03 PT |
1175 | struct page **pages, int npages, int async) |
1176 | { | |
1177 | struct lu_env *env; | |
1178 | struct echo_thread_info *info; | |
1179 | struct cl_object *obj = echo_obj2cl(eco); | |
1180 | struct echo_device *ed = eco->eo_dev; | |
1181 | struct cl_2queue *queue; | |
1182 | struct cl_io *io; | |
1183 | struct cl_page *clp; | |
1184 | struct lustre_handle lh = { 0 }; | |
1185 | int page_size = cl_page_size(obj); | |
1186 | int refcheck; | |
1187 | int rc; | |
1188 | int i; | |
d7e09d03 PT |
1189 | |
1190 | LASSERT((offset & ~CFS_PAGE_MASK) == 0); | |
1191 | LASSERT(ed->ed_next != NULL); | |
1192 | env = cl_env_get(&refcheck); | |
1193 | if (IS_ERR(env)) | |
0a3bdb00 | 1194 | return PTR_ERR(env); |
d7e09d03 PT |
1195 | |
1196 | info = echo_env_info(env); | |
1197 | io = &info->eti_io; | |
1198 | queue = &info->eti_queue; | |
1199 | ||
1200 | cl_2queue_init(queue); | |
1201 | ||
1202 | io->ci_ignore_layout = 1; | |
1203 | rc = cl_io_init(env, io, CIT_MISC, obj); | |
1204 | if (rc < 0) | |
abb368ab | 1205 | goto out; |
d7e09d03 PT |
1206 | LASSERT(rc == 0); |
1207 | ||
d7e09d03 PT |
1208 | rc = cl_echo_enqueue0(env, eco, offset, |
1209 | offset + npages * PAGE_CACHE_SIZE - 1, | |
1210 | rw == READ ? LCK_PR : LCK_PW, &lh.cookie, | |
1211 | CEF_NEVER); | |
1212 | if (rc < 0) | |
abb368ab | 1213 | goto error_lock; |
d7e09d03 PT |
1214 | |
1215 | for (i = 0; i < npages; i++) { | |
1216 | LASSERT(pages[i]); | |
1217 | clp = cl_page_find(env, obj, cl_index(obj, offset), | |
1218 | pages[i], CPT_TRANSIENT); | |
1219 | if (IS_ERR(clp)) { | |
1220 | rc = PTR_ERR(clp); | |
1221 | break; | |
1222 | } | |
1223 | LASSERT(clp->cp_type == CPT_TRANSIENT); | |
1224 | ||
1225 | rc = cl_page_own(env, io, clp); | |
1226 | if (rc) { | |
1227 | LASSERT(clp->cp_state == CPS_FREEING); | |
1228 | cl_page_put(env, clp); | |
1229 | break; | |
1230 | } | |
1231 | ||
1232 | cl_2queue_add(queue, clp); | |
1233 | ||
1234 | /* drop the reference count for cl_page_find, so that the page | |
1235 | * will be freed in cl_2queue_fini. */ | |
1236 | cl_page_put(env, clp); | |
1237 | cl_page_clip(env, clp, 0, page_size); | |
1238 | ||
1239 | offset += page_size; | |
1240 | } | |
1241 | ||
1242 | if (rc == 0) { | |
1243 | enum cl_req_type typ = rw == READ ? CRT_READ : CRT_WRITE; | |
1244 | ||
1245 | async = async && (typ == CRT_WRITE); | |
1246 | if (async) | |
1247 | rc = cl_echo_async_brw(env, io, typ, queue); | |
1248 | else | |
1249 | rc = cl_io_submit_sync(env, io, typ, queue, 0); | |
1250 | CDEBUG(D_INFO, "echo_client %s write returns %d\n", | |
1251 | async ? "async" : "sync", rc); | |
1252 | } | |
1253 | ||
1254 | cl_echo_cancel0(env, ed, lh.cookie); | |
d7e09d03 PT |
1255 | error_lock: |
1256 | cl_2queue_discard(env, io, queue); | |
1257 | cl_2queue_disown(env, io, queue); | |
1258 | cl_2queue_fini(env, queue); | |
1259 | cl_io_fini(env, io); | |
1260 | out: | |
1261 | cl_env_put(env, &refcheck); | |
1262 | return rc; | |
1263 | } | |
c9f6bb96 | 1264 | |
d7e09d03 PT |
1265 | /** @} echo_exports */ |
1266 | ||
21aef7d9 | 1267 | static u64 last_object_id; |
d7e09d03 PT |
1268 | |
1269 | static int | |
cb7e9f7b | 1270 | echo_copyout_lsm(struct lov_stripe_md *lsm, void *_ulsm, int ulsm_nob) |
d7e09d03 PT |
1271 | { |
1272 | struct lov_stripe_md *ulsm = _ulsm; | |
1273 | int nob, i; | |
1274 | ||
cb7e9f7b | 1275 | nob = offsetof(struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]); |
d7e09d03 | 1276 | if (nob > ulsm_nob) |
fbe7c6c7 | 1277 | return -EINVAL; |
d7e09d03 | 1278 | |
d841438a | 1279 | if (copy_to_user(ulsm, lsm, sizeof(*ulsm))) |
fbe7c6c7 | 1280 | return -EFAULT; |
d7e09d03 PT |
1281 | |
1282 | for (i = 0; i < lsm->lsm_stripe_count; i++) { | |
d841438a | 1283 | if (copy_to_user(ulsm->lsm_oinfo[i], lsm->lsm_oinfo[i], |
d7e09d03 | 1284 | sizeof(lsm->lsm_oinfo[0]))) |
fbe7c6c7 | 1285 | return -EFAULT; |
d7e09d03 PT |
1286 | } |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | static int | |
cb7e9f7b | 1291 | echo_copyin_lsm(struct echo_device *ed, struct lov_stripe_md *lsm, |
d7e09d03 PT |
1292 | void *ulsm, int ulsm_nob) |
1293 | { | |
1294 | struct echo_client_obd *ec = ed->ed_ec; | |
1295 | int i; | |
1296 | ||
d841438a | 1297 | if (ulsm_nob < sizeof(*lsm)) |
fbe7c6c7 | 1298 | return -EINVAL; |
d7e09d03 | 1299 | |
d841438a | 1300 | if (copy_from_user(lsm, ulsm, sizeof(*lsm))) |
fbe7c6c7 | 1301 | return -EFAULT; |
d7e09d03 PT |
1302 | |
1303 | if (lsm->lsm_stripe_count > ec->ec_nstripes || | |
1304 | lsm->lsm_magic != LOV_MAGIC || | |
1305 | (lsm->lsm_stripe_size & (~CFS_PAGE_MASK)) != 0 || | |
1306 | ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL)) | |
fbe7c6c7 | 1307 | return -EINVAL; |
d7e09d03 | 1308 | |
d7e09d03 PT |
1309 | for (i = 0; i < lsm->lsm_stripe_count; i++) { |
1310 | if (copy_from_user(lsm->lsm_oinfo[i], | |
1311 | ((struct lov_stripe_md *)ulsm)-> \ | |
1312 | lsm_oinfo[i], | |
1313 | sizeof(lsm->lsm_oinfo[0]))) | |
fbe7c6c7 | 1314 | return -EFAULT; |
d7e09d03 | 1315 | } |
fbe7c6c7 | 1316 | return 0; |
d7e09d03 PT |
1317 | } |
1318 | ||
d7e09d03 PT |
1319 | static int echo_create_object(const struct lu_env *env, struct echo_device *ed, |
1320 | int on_target, struct obdo *oa, void *ulsm, | |
1321 | int ulsm_nob, struct obd_trans_info *oti) | |
1322 | { | |
1323 | struct echo_object *eco; | |
1324 | struct echo_client_obd *ec = ed->ed_ec; | |
1325 | struct lov_stripe_md *lsm = NULL; | |
1326 | int rc; | |
1327 | int created = 0; | |
d7e09d03 PT |
1328 | |
1329 | if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */ | |
1330 | (on_target || /* set_stripe */ | |
1331 | ec->ec_nstripes != 0)) { /* LOV */ | |
d841438a | 1332 | CERROR("No valid oid\n"); |
0a3bdb00 | 1333 | return -EINVAL; |
d7e09d03 PT |
1334 | } |
1335 | ||
1336 | rc = echo_alloc_memmd(ed, &lsm); | |
1337 | if (rc < 0) { | |
1338 | CERROR("Cannot allocate md: rc = %d\n", rc); | |
abb368ab | 1339 | goto failed; |
d7e09d03 PT |
1340 | } |
1341 | ||
1342 | if (ulsm != NULL) { | |
1343 | int i, idx; | |
1344 | ||
d841438a | 1345 | rc = echo_copyin_lsm(ed, lsm, ulsm, ulsm_nob); |
d7e09d03 | 1346 | if (rc != 0) |
abb368ab | 1347 | goto failed; |
d7e09d03 PT |
1348 | |
1349 | if (lsm->lsm_stripe_count == 0) | |
1350 | lsm->lsm_stripe_count = ec->ec_nstripes; | |
1351 | ||
1352 | if (lsm->lsm_stripe_size == 0) | |
1353 | lsm->lsm_stripe_size = PAGE_CACHE_SIZE; | |
1354 | ||
1355 | idx = cfs_rand(); | |
1356 | ||
1357 | /* setup stripes: indices + default ids if required */ | |
1358 | for (i = 0; i < lsm->lsm_stripe_count; i++) { | |
1359 | if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) == 0) | |
1360 | lsm->lsm_oinfo[i]->loi_oi = lsm->lsm_oi; | |
1361 | ||
1362 | lsm->lsm_oinfo[i]->loi_ost_idx = | |
1363 | (idx + i) % ec->ec_nstripes; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | /* setup object ID here for !on_target and LOV hint */ | |
1368 | if (oa->o_valid & OBD_MD_FLID) { | |
1369 | LASSERT(oa->o_valid & OBD_MD_FLGROUP); | |
1370 | lsm->lsm_oi = oa->o_oi; | |
1371 | } | |
1372 | ||
1373 | if (ostid_id(&lsm->lsm_oi) == 0) | |
1374 | ostid_set_id(&lsm->lsm_oi, ++last_object_id); | |
1375 | ||
1376 | rc = 0; | |
1377 | if (on_target) { | |
1378 | /* Only echo objects are allowed to be created */ | |
1379 | LASSERT((oa->o_valid & OBD_MD_FLGROUP) && | |
1380 | (ostid_seq(&oa->o_oi) == FID_SEQ_ECHO)); | |
1381 | rc = obd_create(env, ec->ec_exp, oa, &lsm, oti); | |
1382 | if (rc != 0) { | |
1383 | CERROR("Cannot create objects: rc = %d\n", rc); | |
abb368ab | 1384 | goto failed; |
d7e09d03 PT |
1385 | } |
1386 | created = 1; | |
1387 | } | |
1388 | ||
1389 | /* See what object ID we were given */ | |
1390 | oa->o_oi = lsm->lsm_oi; | |
1391 | oa->o_valid |= OBD_MD_FLID; | |
1392 | ||
1393 | eco = cl_echo_object_find(ed, &lsm); | |
abb368ab JY |
1394 | if (IS_ERR(eco)) { |
1395 | rc = PTR_ERR(eco); | |
1396 | goto failed; | |
1397 | } | |
d7e09d03 PT |
1398 | cl_echo_object_put(eco); |
1399 | ||
1400 | CDEBUG(D_INFO, "oa oid "DOSTID"\n", POSTID(&oa->o_oi)); | |
d7e09d03 PT |
1401 | |
1402 | failed: | |
1403 | if (created && rc) | |
ef2e0f55 | 1404 | obd_destroy(env, ec->ec_exp, oa, lsm, oti, NULL); |
d7e09d03 PT |
1405 | if (lsm) |
1406 | echo_free_memmd(ed, &lsm); | |
1407 | if (rc) | |
1408 | CERROR("create object failed with: rc = %d\n", rc); | |
fbe7c6c7 | 1409 | return rc; |
d7e09d03 PT |
1410 | } |
1411 | ||
1412 | static int echo_get_object(struct echo_object **ecop, struct echo_device *ed, | |
1413 | struct obdo *oa) | |
1414 | { | |
1415 | struct lov_stripe_md *lsm = NULL; | |
1416 | struct echo_object *eco; | |
1417 | int rc; | |
d7e09d03 PT |
1418 | |
1419 | if ((oa->o_valid & OBD_MD_FLID) == 0 || ostid_id(&oa->o_oi) == 0) { | |
1420 | /* disallow use of object id 0 */ | |
d841438a | 1421 | CERROR("No valid oid\n"); |
0a3bdb00 | 1422 | return -EINVAL; |
d7e09d03 PT |
1423 | } |
1424 | ||
1425 | rc = echo_alloc_memmd(ed, &lsm); | |
1426 | if (rc < 0) | |
0a3bdb00 | 1427 | return rc; |
d7e09d03 PT |
1428 | |
1429 | lsm->lsm_oi = oa->o_oi; | |
1430 | if (!(oa->o_valid & OBD_MD_FLGROUP)) | |
1431 | ostid_set_seq_echo(&lsm->lsm_oi); | |
1432 | ||
1433 | rc = 0; | |
1434 | eco = cl_echo_object_find(ed, &lsm); | |
1435 | if (!IS_ERR(eco)) | |
1436 | *ecop = eco; | |
1437 | else | |
1438 | rc = PTR_ERR(eco); | |
1439 | if (lsm) | |
1440 | echo_free_memmd(ed, &lsm); | |
0a3bdb00 | 1441 | return rc; |
d7e09d03 PT |
1442 | } |
1443 | ||
1444 | static void echo_put_object(struct echo_object *eco) | |
1445 | { | |
1446 | if (cl_echo_object_put(eco)) | |
1447 | CERROR("echo client: drop an object failed"); | |
1448 | } | |
1449 | ||
1450 | static void | |
21aef7d9 | 1451 | echo_get_stripe_off_id(struct lov_stripe_md *lsm, u64 *offp, u64 *idp) |
d7e09d03 PT |
1452 | { |
1453 | unsigned long stripe_count; | |
1454 | unsigned long stripe_size; | |
1455 | unsigned long width; | |
1456 | unsigned long woffset; | |
1457 | int stripe_index; | |
21aef7d9 | 1458 | u64 offset; |
d7e09d03 PT |
1459 | |
1460 | if (lsm->lsm_stripe_count <= 1) | |
1461 | return; | |
1462 | ||
1463 | offset = *offp; | |
1464 | stripe_size = lsm->lsm_stripe_size; | |
1465 | stripe_count = lsm->lsm_stripe_count; | |
1466 | ||
1467 | /* width = # bytes in all stripes */ | |
1468 | width = stripe_size * stripe_count; | |
1469 | ||
1470 | /* woffset = offset within a width; offset = whole number of widths */ | |
d841438a | 1471 | woffset = do_div(offset, width); |
d7e09d03 PT |
1472 | |
1473 | stripe_index = woffset / stripe_size; | |
1474 | ||
1475 | *idp = ostid_id(&lsm->lsm_oinfo[stripe_index]->loi_oi); | |
1476 | *offp = offset * stripe_size + woffset % stripe_size; | |
1477 | } | |
1478 | ||
1479 | static void | |
1480 | echo_client_page_debug_setup(struct lov_stripe_md *lsm, | |
21aef7d9 OD |
1481 | struct page *page, int rw, u64 id, |
1482 | u64 offset, u64 count) | |
d7e09d03 PT |
1483 | { |
1484 | char *addr; | |
21aef7d9 OD |
1485 | u64 stripe_off; |
1486 | u64 stripe_id; | |
d7e09d03 PT |
1487 | int delta; |
1488 | ||
1489 | /* no partial pages on the client */ | |
1490 | LASSERT(count == PAGE_CACHE_SIZE); | |
1491 | ||
1492 | addr = kmap(page); | |
1493 | ||
1494 | for (delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) { | |
1495 | if (rw == OBD_BRW_WRITE) { | |
1496 | stripe_off = offset + delta; | |
1497 | stripe_id = id; | |
1498 | echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id); | |
1499 | } else { | |
1500 | stripe_off = 0xdeadbeef00c0ffeeULL; | |
1501 | stripe_id = 0xdeadbeef00c0ffeeULL; | |
1502 | } | |
1503 | block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE, | |
1504 | stripe_off, stripe_id); | |
1505 | } | |
1506 | ||
1507 | kunmap(page); | |
1508 | } | |
1509 | ||
1510 | static int echo_client_page_debug_check(struct lov_stripe_md *lsm, | |
21aef7d9 OD |
1511 | struct page *page, u64 id, |
1512 | u64 offset, u64 count) | |
d7e09d03 | 1513 | { |
21aef7d9 OD |
1514 | u64 stripe_off; |
1515 | u64 stripe_id; | |
d7e09d03 PT |
1516 | char *addr; |
1517 | int delta; | |
1518 | int rc; | |
1519 | int rc2; | |
1520 | ||
1521 | /* no partial pages on the client */ | |
1522 | LASSERT(count == PAGE_CACHE_SIZE); | |
1523 | ||
1524 | addr = kmap(page); | |
1525 | ||
1526 | for (rc = delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) { | |
1527 | stripe_off = offset + delta; | |
1528 | stripe_id = id; | |
d841438a | 1529 | echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id); |
d7e09d03 PT |
1530 | |
1531 | rc2 = block_debug_check("test_brw", | |
1532 | addr + delta, OBD_ECHO_BLOCK_SIZE, | |
1533 | stripe_off, stripe_id); | |
1534 | if (rc2 != 0) { | |
d841438a | 1535 | CERROR("Error in echo object %#llx\n", id); |
d7e09d03 PT |
1536 | rc = rc2; |
1537 | } | |
1538 | } | |
1539 | ||
1540 | kunmap(page); | |
1541 | return rc; | |
1542 | } | |
1543 | ||
1544 | static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa, | |
21aef7d9 OD |
1545 | struct echo_object *eco, u64 offset, |
1546 | u64 count, int async, | |
d7e09d03 PT |
1547 | struct obd_trans_info *oti) |
1548 | { | |
1549 | struct lov_stripe_md *lsm = eco->eo_lsm; | |
21aef7d9 | 1550 | u32 npages; |
d7e09d03 PT |
1551 | struct brw_page *pga; |
1552 | struct brw_page *pgp; | |
1553 | struct page **pages; | |
21aef7d9 | 1554 | u64 off; |
d7e09d03 PT |
1555 | int i; |
1556 | int rc; | |
1557 | int verify; | |
cad7aa13 | 1558 | gfp_t gfp_mask; |
d7e09d03 | 1559 | int brw_flags = 0; |
d7e09d03 PT |
1560 | |
1561 | verify = (ostid_id(&oa->o_oi) != ECHO_PERSISTENT_OBJID && | |
1562 | (oa->o_valid & OBD_MD_FLFLAGS) != 0 && | |
1563 | (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0); | |
1564 | ||
1565 | gfp_mask = ((ostid_id(&oa->o_oi) & 2) == 0) ? GFP_IOFS : GFP_HIGHUSER; | |
1566 | ||
1567 | LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ); | |
1568 | LASSERT(lsm != NULL); | |
1569 | LASSERT(ostid_id(&lsm->lsm_oi) == ostid_id(&oa->o_oi)); | |
1570 | ||
1571 | if (count <= 0 || | |
1572 | (count & (~CFS_PAGE_MASK)) != 0) | |
0a3bdb00 | 1573 | return -EINVAL; |
d7e09d03 PT |
1574 | |
1575 | /* XXX think again with misaligned I/O */ | |
1576 | npages = count >> PAGE_CACHE_SHIFT; | |
1577 | ||
1578 | if (rw == OBD_BRW_WRITE) | |
1579 | brw_flags = OBD_BRW_ASYNC; | |
1580 | ||
c5b89520 | 1581 | pga = kcalloc(npages, sizeof(*pga), GFP_NOFS); |
d7e09d03 | 1582 | if (pga == NULL) |
0a3bdb00 | 1583 | return -ENOMEM; |
d7e09d03 | 1584 | |
c5b89520 | 1585 | pages = kcalloc(npages, sizeof(*pages), GFP_NOFS); |
d7e09d03 | 1586 | if (pages == NULL) { |
c5b89520 | 1587 | kfree(pga); |
0a3bdb00 | 1588 | return -ENOMEM; |
d7e09d03 PT |
1589 | } |
1590 | ||
1591 | for (i = 0, pgp = pga, off = offset; | |
1592 | i < npages; | |
1593 | i++, pgp++, off += PAGE_CACHE_SIZE) { | |
1594 | ||
d841438a | 1595 | LASSERT(pgp->pg == NULL); /* for cleanup */ |
d7e09d03 PT |
1596 | |
1597 | rc = -ENOMEM; | |
0c52e423 | 1598 | pgp->pg = alloc_page(gfp_mask); |
d7e09d03 PT |
1599 | if (pgp->pg == NULL) |
1600 | goto out; | |
1601 | ||
1602 | pages[i] = pgp->pg; | |
1603 | pgp->count = PAGE_CACHE_SIZE; | |
1604 | pgp->off = off; | |
1605 | pgp->flag = brw_flags; | |
1606 | ||
1607 | if (verify) | |
1608 | echo_client_page_debug_setup(lsm, pgp->pg, rw, | |
1609 | ostid_id(&oa->o_oi), off, | |
1610 | pgp->count); | |
1611 | } | |
1612 | ||
1613 | /* brw mode can only be used at client */ | |
1614 | LASSERT(ed->ed_next != NULL); | |
1615 | rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async); | |
1616 | ||
1617 | out: | |
1618 | if (rc != 0 || rw != OBD_BRW_READ) | |
1619 | verify = 0; | |
1620 | ||
1621 | for (i = 0, pgp = pga; i < npages; i++, pgp++) { | |
1622 | if (pgp->pg == NULL) | |
1623 | continue; | |
1624 | ||
1625 | if (verify) { | |
1626 | int vrc; | |
ded9f908 | 1627 | |
d7e09d03 PT |
1628 | vrc = echo_client_page_debug_check(lsm, pgp->pg, |
1629 | ostid_id(&oa->o_oi), | |
1630 | pgp->off, pgp->count); | |
1631 | if (vrc != 0 && rc == 0) | |
1632 | rc = vrc; | |
1633 | } | |
0c52e423 | 1634 | __free_page(pgp->pg); |
d7e09d03 | 1635 | } |
c5b89520 JL |
1636 | kfree(pga); |
1637 | kfree(pages); | |
0a3bdb00 | 1638 | return rc; |
d7e09d03 PT |
1639 | } |
1640 | ||
1641 | static int echo_client_prep_commit(const struct lu_env *env, | |
1642 | struct obd_export *exp, int rw, | |
1643 | struct obdo *oa, struct echo_object *eco, | |
21aef7d9 OD |
1644 | u64 offset, u64 count, |
1645 | u64 batch, struct obd_trans_info *oti, | |
d7e09d03 PT |
1646 | int async) |
1647 | { | |
1648 | struct lov_stripe_md *lsm = eco->eo_lsm; | |
1649 | struct obd_ioobj ioo; | |
1650 | struct niobuf_local *lnb; | |
1651 | struct niobuf_remote *rnb; | |
21aef7d9 OD |
1652 | u64 off; |
1653 | u64 npages, tot_pages; | |
d7e09d03 PT |
1654 | int i, ret = 0, brw_flags = 0; |
1655 | ||
d7e09d03 PT |
1656 | if (count <= 0 || (count & (~CFS_PAGE_MASK)) != 0 || |
1657 | (lsm != NULL && ostid_id(&lsm->lsm_oi) != ostid_id(&oa->o_oi))) | |
0a3bdb00 | 1658 | return -EINVAL; |
d7e09d03 PT |
1659 | |
1660 | npages = batch >> PAGE_CACHE_SHIFT; | |
1661 | tot_pages = count >> PAGE_CACHE_SHIFT; | |
1662 | ||
c5b89520 JL |
1663 | lnb = kcalloc(npages, sizeof(struct niobuf_local), GFP_NOFS); |
1664 | rnb = kcalloc(npages, sizeof(struct niobuf_remote), GFP_NOFS); | |
d7e09d03 | 1665 | |
abb368ab JY |
1666 | if (lnb == NULL || rnb == NULL) { |
1667 | ret = -ENOMEM; | |
1668 | goto out; | |
1669 | } | |
d7e09d03 PT |
1670 | |
1671 | if (rw == OBD_BRW_WRITE && async) | |
1672 | brw_flags |= OBD_BRW_ASYNC; | |
1673 | ||
1674 | obdo_to_ioobj(oa, &ioo); | |
1675 | ||
1676 | off = offset; | |
1677 | ||
a58a38ac | 1678 | for (; tot_pages; tot_pages -= npages) { |
d7e09d03 PT |
1679 | int lpages; |
1680 | ||
1681 | if (tot_pages < npages) | |
1682 | npages = tot_pages; | |
1683 | ||
1684 | for (i = 0; i < npages; i++, off += PAGE_CACHE_SIZE) { | |
1685 | rnb[i].offset = off; | |
1686 | rnb[i].len = PAGE_CACHE_SIZE; | |
1687 | rnb[i].flags = brw_flags; | |
1688 | } | |
1689 | ||
1690 | ioo.ioo_bufcnt = npages; | |
1691 | oti->oti_transno = 0; | |
1692 | ||
1693 | lpages = npages; | |
1694 | ret = obd_preprw(env, rw, exp, oa, 1, &ioo, rnb, &lpages, | |
ef2e0f55 | 1695 | lnb, oti); |
d7e09d03 | 1696 | if (ret != 0) |
abb368ab | 1697 | goto out; |
d7e09d03 PT |
1698 | LASSERT(lpages == npages); |
1699 | ||
1700 | for (i = 0; i < lpages; i++) { | |
1701 | struct page *page = lnb[i].page; | |
1702 | ||
1703 | /* read past eof? */ | |
1704 | if (page == NULL && lnb[i].rc == 0) | |
1705 | continue; | |
1706 | ||
1707 | if (async) | |
1708 | lnb[i].flags |= OBD_BRW_ASYNC; | |
1709 | ||
1710 | if (ostid_id(&oa->o_oi) == ECHO_PERSISTENT_OBJID || | |
1711 | (oa->o_valid & OBD_MD_FLFLAGS) == 0 || | |
1712 | (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0) | |
1713 | continue; | |
1714 | ||
1715 | if (rw == OBD_BRW_WRITE) | |
1716 | echo_client_page_debug_setup(lsm, page, rw, | |
1717 | ostid_id(&oa->o_oi), | |
1718 | rnb[i].offset, | |
1719 | rnb[i].len); | |
1720 | else | |
1721 | echo_client_page_debug_check(lsm, page, | |
1722 | ostid_id(&oa->o_oi), | |
1723 | rnb[i].offset, | |
1724 | rnb[i].len); | |
1725 | } | |
1726 | ||
1727 | ret = obd_commitrw(env, rw, exp, oa, 1, &ioo, | |
1728 | rnb, npages, lnb, oti, ret); | |
1729 | if (ret != 0) | |
abb368ab | 1730 | goto out; |
d7e09d03 PT |
1731 | |
1732 | /* Reset oti otherwise it would confuse ldiskfs. */ | |
1733 | memset(oti, 0, sizeof(*oti)); | |
09b0170e JY |
1734 | |
1735 | /* Reuse env context. */ | |
1736 | lu_context_exit((struct lu_context *)&env->le_ctx); | |
1737 | lu_context_enter((struct lu_context *)&env->le_ctx); | |
d7e09d03 PT |
1738 | } |
1739 | ||
1740 | out: | |
627ef6ea JL |
1741 | kfree(lnb); |
1742 | kfree(rnb); | |
0a3bdb00 | 1743 | return ret; |
d7e09d03 PT |
1744 | } |
1745 | ||
1746 | static int echo_client_brw_ioctl(const struct lu_env *env, int rw, | |
1747 | struct obd_export *exp, | |
1748 | struct obd_ioctl_data *data, | |
1749 | struct obd_trans_info *dummy_oti) | |
1750 | { | |
1751 | struct obd_device *obd = class_exp2obd(exp); | |
1752 | struct echo_device *ed = obd2echo_dev(obd); | |
1753 | struct echo_client_obd *ec = ed->ed_ec; | |
1754 | struct obdo *oa = &data->ioc_obdo1; | |
1755 | struct echo_object *eco; | |
1756 | int rc; | |
1757 | int async = 1; | |
1758 | long test_mode; | |
d7e09d03 PT |
1759 | |
1760 | LASSERT(oa->o_valid & OBD_MD_FLGROUP); | |
1761 | ||
1762 | rc = echo_get_object(&eco, ed, oa); | |
1763 | if (rc) | |
0a3bdb00 | 1764 | return rc; |
d7e09d03 PT |
1765 | |
1766 | oa->o_valid &= ~OBD_MD_FLHANDLE; | |
1767 | ||
1768 | /* OFD/obdfilter works only via prep/commit */ | |
1769 | test_mode = (long)data->ioc_pbuf1; | |
1770 | if (test_mode == 1) | |
1771 | async = 0; | |
1772 | ||
1773 | if (ed->ed_next == NULL && test_mode != 3) { | |
1774 | test_mode = 3; | |
1775 | data->ioc_plen1 = data->ioc_count; | |
1776 | } | |
1777 | ||
1778 | /* Truncate batch size to maximum */ | |
1779 | if (data->ioc_plen1 > PTLRPC_MAX_BRW_SIZE) | |
1780 | data->ioc_plen1 = PTLRPC_MAX_BRW_SIZE; | |
1781 | ||
1782 | switch (test_mode) { | |
1783 | case 1: | |
1784 | /* fall through */ | |
1785 | case 2: | |
1786 | rc = echo_client_kbrw(ed, rw, oa, | |
1787 | eco, data->ioc_offset, | |
1788 | data->ioc_count, async, dummy_oti); | |
1789 | break; | |
1790 | case 3: | |
1791 | rc = echo_client_prep_commit(env, ec->ec_exp, rw, oa, | |
1792 | eco, data->ioc_offset, | |
1793 | data->ioc_count, data->ioc_plen1, | |
1794 | dummy_oti, async); | |
1795 | break; | |
1796 | default: | |
1797 | rc = -EINVAL; | |
1798 | } | |
1799 | echo_put_object(eco); | |
0a3bdb00 | 1800 | return rc; |
d7e09d03 PT |
1801 | } |
1802 | ||
1803 | static int | |
1804 | echo_client_enqueue(struct obd_export *exp, struct obdo *oa, | |
21aef7d9 | 1805 | int mode, u64 offset, u64 nob) |
d7e09d03 PT |
1806 | { |
1807 | struct echo_device *ed = obd2echo_dev(exp->exp_obd); | |
1808 | struct lustre_handle *ulh = &oa->o_handle; | |
1809 | struct echo_object *eco; | |
21aef7d9 | 1810 | u64 end; |
d7e09d03 | 1811 | int rc; |
d7e09d03 PT |
1812 | |
1813 | if (ed->ed_next == NULL) | |
0a3bdb00 | 1814 | return -EOPNOTSUPP; |
d7e09d03 PT |
1815 | |
1816 | if (!(mode == LCK_PR || mode == LCK_PW)) | |
0a3bdb00 | 1817 | return -EINVAL; |
d7e09d03 PT |
1818 | |
1819 | if ((offset & (~CFS_PAGE_MASK)) != 0 || | |
1820 | (nob & (~CFS_PAGE_MASK)) != 0) | |
0a3bdb00 | 1821 | return -EINVAL; |
d7e09d03 | 1822 | |
d841438a | 1823 | rc = echo_get_object(&eco, ed, oa); |
d7e09d03 | 1824 | if (rc != 0) |
0a3bdb00 | 1825 | return rc; |
d7e09d03 | 1826 | |
21aef7d9 | 1827 | end = (nob == 0) ? ((u64) -1) : (offset + nob - 1); |
d7e09d03 PT |
1828 | rc = cl_echo_enqueue(eco, offset, end, mode, &ulh->cookie); |
1829 | if (rc == 0) { | |
1830 | oa->o_valid |= OBD_MD_FLHANDLE; | |
55f5a824 | 1831 | CDEBUG(D_INFO, "Cookie is %#llx\n", ulh->cookie); |
d7e09d03 PT |
1832 | } |
1833 | echo_put_object(eco); | |
0a3bdb00 | 1834 | return rc; |
d7e09d03 PT |
1835 | } |
1836 | ||
1837 | static int | |
1838 | echo_client_cancel(struct obd_export *exp, struct obdo *oa) | |
1839 | { | |
1840 | struct echo_device *ed = obd2echo_dev(exp->exp_obd); | |
1841 | __u64 cookie = oa->o_handle.cookie; | |
1842 | ||
1843 | if ((oa->o_valid & OBD_MD_FLHANDLE) == 0) | |
1844 | return -EINVAL; | |
1845 | ||
55f5a824 | 1846 | CDEBUG(D_INFO, "Cookie is %#llx\n", cookie); |
d7e09d03 PT |
1847 | return cl_echo_cancel(ed, cookie); |
1848 | } | |
1849 | ||
1850 | static int | |
1851 | echo_client_iocontrol(unsigned int cmd, struct obd_export *exp, int len, | |
1852 | void *karg, void *uarg) | |
1853 | { | |
1854 | struct obd_device *obd = exp->exp_obd; | |
1855 | struct echo_device *ed = obd2echo_dev(obd); | |
1856 | struct echo_client_obd *ec = ed->ed_ec; | |
1857 | struct echo_object *eco; | |
1858 | struct obd_ioctl_data *data = karg; | |
1859 | struct obd_trans_info dummy_oti; | |
1860 | struct lu_env *env; | |
1861 | struct oti_req_ack_lock *ack_lock; | |
1862 | struct obdo *oa; | |
1863 | struct lu_fid fid; | |
1864 | int rw = OBD_BRW_READ; | |
1865 | int rc = 0; | |
1866 | int i; | |
d7e09d03 PT |
1867 | |
1868 | memset(&dummy_oti, 0, sizeof(dummy_oti)); | |
1869 | ||
1870 | oa = &data->ioc_obdo1; | |
1871 | if (!(oa->o_valid & OBD_MD_FLGROUP)) { | |
1872 | oa->o_valid |= OBD_MD_FLGROUP; | |
1873 | ostid_set_seq_echo(&oa->o_oi); | |
1874 | } | |
1875 | ||
1876 | /* This FID is unpacked just for validation at this point */ | |
1877 | rc = ostid_to_fid(&fid, &oa->o_oi, 0); | |
1878 | if (rc < 0) | |
0a3bdb00 | 1879 | return rc; |
d7e09d03 | 1880 | |
c5b89520 | 1881 | env = kzalloc(sizeof(*env), GFP_NOFS); |
efeb257d | 1882 | if (!env) |
0a3bdb00 | 1883 | return -ENOMEM; |
d7e09d03 PT |
1884 | |
1885 | rc = lu_env_init(env, LCT_DT_THREAD); | |
abb368ab JY |
1886 | if (rc) { |
1887 | rc = -ENOMEM; | |
1888 | goto out; | |
1889 | } | |
d7e09d03 PT |
1890 | |
1891 | switch (cmd) { | |
1892 | case OBD_IOC_CREATE: /* may create echo object */ | |
abb368ab JY |
1893 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1894 | rc = -EPERM; | |
1895 | goto out; | |
1896 | } | |
d7e09d03 PT |
1897 | |
1898 | rc = echo_create_object(env, ed, 1, oa, data->ioc_pbuf1, | |
1899 | data->ioc_plen1, &dummy_oti); | |
abb368ab | 1900 | goto out; |
d7e09d03 | 1901 | |
d7e09d03 | 1902 | case OBD_IOC_DESTROY: |
abb368ab JY |
1903 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1904 | rc = -EPERM; | |
1905 | goto out; | |
1906 | } | |
d7e09d03 PT |
1907 | |
1908 | rc = echo_get_object(&eco, ed, oa); | |
1909 | if (rc == 0) { | |
1910 | rc = obd_destroy(env, ec->ec_exp, oa, eco->eo_lsm, | |
ef2e0f55 | 1911 | &dummy_oti, NULL); |
d7e09d03 PT |
1912 | if (rc == 0) |
1913 | eco->eo_deleted = 1; | |
1914 | echo_put_object(eco); | |
1915 | } | |
abb368ab | 1916 | goto out; |
d7e09d03 PT |
1917 | |
1918 | case OBD_IOC_GETATTR: | |
1919 | rc = echo_get_object(&eco, ed, oa); | |
1920 | if (rc == 0) { | |
45efd655 | 1921 | struct obd_info oinfo = { }; |
ded9f908 | 1922 | |
d7e09d03 PT |
1923 | oinfo.oi_md = eco->eo_lsm; |
1924 | oinfo.oi_oa = oa; | |
1925 | rc = obd_getattr(env, ec->ec_exp, &oinfo); | |
1926 | echo_put_object(eco); | |
1927 | } | |
abb368ab | 1928 | goto out; |
d7e09d03 PT |
1929 | |
1930 | case OBD_IOC_SETATTR: | |
abb368ab JY |
1931 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1932 | rc = -EPERM; | |
1933 | goto out; | |
1934 | } | |
d7e09d03 PT |
1935 | |
1936 | rc = echo_get_object(&eco, ed, oa); | |
1937 | if (rc == 0) { | |
45efd655 | 1938 | struct obd_info oinfo = { }; |
ded9f908 | 1939 | |
d7e09d03 PT |
1940 | oinfo.oi_oa = oa; |
1941 | oinfo.oi_md = eco->eo_lsm; | |
1942 | ||
1943 | rc = obd_setattr(env, ec->ec_exp, &oinfo, NULL); | |
1944 | echo_put_object(eco); | |
1945 | } | |
abb368ab | 1946 | goto out; |
d7e09d03 PT |
1947 | |
1948 | case OBD_IOC_BRW_WRITE: | |
abb368ab JY |
1949 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1950 | rc = -EPERM; | |
1951 | goto out; | |
1952 | } | |
d7e09d03 PT |
1953 | |
1954 | rw = OBD_BRW_WRITE; | |
1955 | /* fall through */ | |
1956 | case OBD_IOC_BRW_READ: | |
1957 | rc = echo_client_brw_ioctl(env, rw, exp, data, &dummy_oti); | |
abb368ab | 1958 | goto out; |
d7e09d03 PT |
1959 | |
1960 | case ECHO_IOC_GET_STRIPE: | |
1961 | rc = echo_get_object(&eco, ed, oa); | |
1962 | if (rc == 0) { | |
1963 | rc = echo_copyout_lsm(eco->eo_lsm, data->ioc_pbuf1, | |
1964 | data->ioc_plen1); | |
1965 | echo_put_object(eco); | |
1966 | } | |
abb368ab | 1967 | goto out; |
d7e09d03 PT |
1968 | |
1969 | case ECHO_IOC_SET_STRIPE: | |
abb368ab JY |
1970 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1971 | rc = -EPERM; | |
1972 | goto out; | |
1973 | } | |
d7e09d03 PT |
1974 | |
1975 | if (data->ioc_pbuf1 == NULL) { /* unset */ | |
1976 | rc = echo_get_object(&eco, ed, oa); | |
1977 | if (rc == 0) { | |
1978 | eco->eo_deleted = 1; | |
1979 | echo_put_object(eco); | |
1980 | } | |
1981 | } else { | |
1982 | rc = echo_create_object(env, ed, 0, oa, | |
1983 | data->ioc_pbuf1, | |
1984 | data->ioc_plen1, &dummy_oti); | |
1985 | } | |
abb368ab | 1986 | goto out; |
d7e09d03 PT |
1987 | |
1988 | case ECHO_IOC_ENQUEUE: | |
abb368ab JY |
1989 | if (!capable(CFS_CAP_SYS_ADMIN)) { |
1990 | rc = -EPERM; | |
1991 | goto out; | |
1992 | } | |
d7e09d03 PT |
1993 | |
1994 | rc = echo_client_enqueue(exp, oa, | |
1995 | data->ioc_conn1, /* lock mode */ | |
1996 | data->ioc_offset, | |
1997 | data->ioc_count);/*extent*/ | |
abb368ab | 1998 | goto out; |
d7e09d03 PT |
1999 | |
2000 | case ECHO_IOC_CANCEL: | |
2001 | rc = echo_client_cancel(exp, oa); | |
abb368ab | 2002 | goto out; |
d7e09d03 PT |
2003 | |
2004 | default: | |
d841438a | 2005 | CERROR("echo_ioctl(): unrecognised ioctl %#x\n", cmd); |
abb368ab JY |
2006 | rc = -ENOTTY; |
2007 | goto out; | |
d7e09d03 PT |
2008 | } |
2009 | ||
d7e09d03 PT |
2010 | out: |
2011 | lu_env_fini(env); | |
c5b89520 | 2012 | kfree(env); |
d7e09d03 PT |
2013 | |
2014 | /* XXX this should be in a helper also called by target_send_reply */ | |
2015 | for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4; | |
2016 | i++, ack_lock++) { | |
2017 | if (!ack_lock->mode) | |
2018 | break; | |
2019 | ldlm_lock_decref(&ack_lock->lock, ack_lock->mode); | |
2020 | } | |
2021 | ||
2022 | return rc; | |
2023 | } | |
2024 | ||
2025 | static int echo_client_setup(const struct lu_env *env, | |
2026 | struct obd_device *obddev, struct lustre_cfg *lcfg) | |
2027 | { | |
2028 | struct echo_client_obd *ec = &obddev->u.echo_client; | |
2029 | struct obd_device *tgt; | |
2030 | struct obd_uuid echo_uuid = { "ECHO_UUID" }; | |
2031 | struct obd_connect_data *ocd = NULL; | |
2032 | int rc; | |
d7e09d03 PT |
2033 | |
2034 | if (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) { | |
2035 | CERROR("requires a TARGET OBD name\n"); | |
0a3bdb00 | 2036 | return -EINVAL; |
d7e09d03 PT |
2037 | } |
2038 | ||
2039 | tgt = class_name2obd(lustre_cfg_string(lcfg, 1)); | |
2040 | if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) { | |
2041 | CERROR("device not attached or not set up (%s)\n", | |
2042 | lustre_cfg_string(lcfg, 1)); | |
0a3bdb00 | 2043 | return -EINVAL; |
d7e09d03 PT |
2044 | } |
2045 | ||
2046 | spin_lock_init(&ec->ec_lock); | |
d841438a YT |
2047 | INIT_LIST_HEAD(&ec->ec_objects); |
2048 | INIT_LIST_HEAD(&ec->ec_locks); | |
d7e09d03 PT |
2049 | ec->ec_unique = 0; |
2050 | ec->ec_nstripes = 0; | |
2051 | ||
c5b89520 | 2052 | ocd = kzalloc(sizeof(*ocd), GFP_NOFS); |
efeb257d | 2053 | if (!ocd) { |
d7e09d03 PT |
2054 | CERROR("Can't alloc ocd connecting to %s\n", |
2055 | lustre_cfg_string(lcfg, 1)); | |
2056 | return -ENOMEM; | |
2057 | } | |
2058 | ||
2059 | ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_REQPORTAL | | |
2060 | OBD_CONNECT_BRW_SIZE | | |
2061 | OBD_CONNECT_GRANT | OBD_CONNECT_FULL20 | | |
3b2f75fd | 2062 | OBD_CONNECT_64BITHASH | OBD_CONNECT_LVB_TYPE | |
2063 | OBD_CONNECT_FID; | |
d7e09d03 PT |
2064 | ocd->ocd_brw_size = DT_MAX_BRW_SIZE; |
2065 | ocd->ocd_version = LUSTRE_VERSION_CODE; | |
2066 | ocd->ocd_group = FID_SEQ_ECHO; | |
2067 | ||
2068 | rc = obd_connect(env, &ec->ec_exp, tgt, &echo_uuid, ocd, NULL); | |
d7e09d03 | 2069 | |
c5b89520 | 2070 | kfree(ocd); |
d7e09d03 PT |
2071 | |
2072 | if (rc != 0) { | |
2073 | CERROR("fail to connect to device %s\n", | |
2074 | lustre_cfg_string(lcfg, 1)); | |
fbe7c6c7 | 2075 | return rc; |
d7e09d03 PT |
2076 | } |
2077 | ||
0a3bdb00 | 2078 | return rc; |
d7e09d03 PT |
2079 | } |
2080 | ||
2081 | static int echo_client_cleanup(struct obd_device *obddev) | |
2082 | { | |
d7e09d03 PT |
2083 | struct echo_client_obd *ec = &obddev->u.echo_client; |
2084 | int rc; | |
d7e09d03 | 2085 | |
d7e09d03 PT |
2086 | if (!list_empty(&obddev->obd_exports)) { |
2087 | CERROR("still has clients!\n"); | |
0a3bdb00 | 2088 | return -EBUSY; |
d7e09d03 PT |
2089 | } |
2090 | ||
2091 | LASSERT(atomic_read(&ec->ec_exp->exp_refcount) > 0); | |
2092 | rc = obd_disconnect(ec->ec_exp); | |
2093 | if (rc != 0) | |
2094 | CERROR("fail to disconnect device: %d\n", rc); | |
2095 | ||
0a3bdb00 | 2096 | return rc; |
d7e09d03 PT |
2097 | } |
2098 | ||
2099 | static int echo_client_connect(const struct lu_env *env, | |
2100 | struct obd_export **exp, | |
2101 | struct obd_device *src, struct obd_uuid *cluuid, | |
2102 | struct obd_connect_data *data, void *localdata) | |
2103 | { | |
2104 | int rc; | |
2105 | struct lustre_handle conn = { 0 }; | |
2106 | ||
d7e09d03 PT |
2107 | rc = class_connect(&conn, src, cluuid); |
2108 | if (rc == 0) { | |
2109 | *exp = class_conn2export(&conn); | |
2110 | } | |
2111 | ||
0a3bdb00 | 2112 | return rc; |
d7e09d03 PT |
2113 | } |
2114 | ||
2115 | static int echo_client_disconnect(struct obd_export *exp) | |
2116 | { | |
d7e09d03 | 2117 | int rc; |
d7e09d03 | 2118 | |
abb368ab JY |
2119 | if (exp == NULL) { |
2120 | rc = -EINVAL; | |
2121 | goto out; | |
2122 | } | |
d7e09d03 | 2123 | |
d7e09d03 | 2124 | rc = class_disconnect(exp); |
abb368ab | 2125 | goto out; |
d7e09d03 PT |
2126 | out: |
2127 | return rc; | |
2128 | } | |
2129 | ||
2130 | static struct obd_ops echo_client_obd_ops = { | |
2131 | .o_owner = THIS_MODULE, | |
d7e09d03 PT |
2132 | .o_iocontrol = echo_client_iocontrol, |
2133 | .o_connect = echo_client_connect, | |
2134 | .o_disconnect = echo_client_disconnect | |
2135 | }; | |
2136 | ||
5b34cd29 | 2137 | static int echo_client_init(void) |
d7e09d03 | 2138 | { |
d7e09d03 PT |
2139 | int rc; |
2140 | ||
d7e09d03 PT |
2141 | rc = lu_kmem_init(echo_caches); |
2142 | if (rc == 0) { | |
2143 | rc = class_register_type(&echo_client_obd_ops, NULL, | |
d7e09d03 PT |
2144 | LUSTRE_ECHO_CLIENT_NAME, |
2145 | &echo_device_type); | |
2146 | if (rc) | |
2147 | lu_kmem_fini(echo_caches); | |
2148 | } | |
2149 | return rc; | |
2150 | } | |
2151 | ||
5b34cd29 | 2152 | static void echo_client_exit(void) |
d7e09d03 PT |
2153 | { |
2154 | class_unregister_type(LUSTRE_ECHO_CLIENT_NAME); | |
2155 | lu_kmem_fini(echo_caches); | |
2156 | } | |
2157 | ||
2158 | static int __init obdecho_init(void) | |
2159 | { | |
d7e09d03 PT |
2160 | LCONSOLE_INFO("Echo OBD driver; http://www.lustre.org/\n"); |
2161 | ||
2162 | LASSERT(PAGE_CACHE_SIZE % OBD_ECHO_BLOCK_SIZE == 0); | |
2163 | ||
d9518b76 | 2164 | return echo_client_init(); |
d7e09d03 PT |
2165 | } |
2166 | ||
2167 | static void /*__exit*/ obdecho_exit(void) | |
2168 | { | |
2169 | echo_client_exit(); | |
2170 | ||
2171 | } | |
2172 | ||
2173 | MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>"); | |
2174 | MODULE_DESCRIPTION("Lustre Testing Echo OBD driver"); | |
2175 | MODULE_LICENSE("GPL"); | |
6960736c | 2176 | MODULE_VERSION(LUSTRE_VERSION_STRING); |
d7e09d03 | 2177 | |
6960736c GKH |
2178 | module_init(obdecho_init); |
2179 | module_exit(obdecho_exit); | |
d7e09d03 PT |
2180 | |
2181 | /** @} echo_client */ |