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staging: lustre: remove LPX64 define
[deliverable/linux.git] / drivers / staging / lustre / lustre / obdecho / echo.c
1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2010, 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 * lustre/obdecho/echo.c
37 *
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Andreas Dilger <adilger@clusterfs.com>
40 */
41
42 #define DEBUG_SUBSYSTEM S_ECHO
43
44 #include "../include/obd_support.h"
45 #include "../include/obd_class.h"
46 #include "../include/lustre_debug.h"
47 #include "../include/lustre_dlm.h"
48 #include "../include/lprocfs_status.h"
49
50 #include "echo_internal.h"
51
52 /* The echo objid needs to be below 2^32, because regular FID numbers are
53 * limited to 2^32 objects in f_oid for the FID_SEQ_ECHO range. b=23335 */
54 #define ECHO_INIT_OID 0x10000000ULL
55 #define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
56
57 #define ECHO_PERSISTENT_PAGES (ECHO_PERSISTENT_SIZE >> PAGE_CACHE_SHIFT)
58 static struct page *echo_persistent_pages[ECHO_PERSISTENT_PAGES];
59
60 enum {
61 LPROC_ECHO_READ_BYTES = 1,
62 LPROC_ECHO_WRITE_BYTES = 2,
63 LPROC_ECHO_LAST = LPROC_ECHO_WRITE_BYTES +1
64 };
65
66 static int echo_connect(const struct lu_env *env,
67 struct obd_export **exp, struct obd_device *obd,
68 struct obd_uuid *cluuid, struct obd_connect_data *data,
69 void *localdata)
70 {
71 struct lustre_handle conn = { 0 };
72 int rc;
73
74 data->ocd_connect_flags &= ECHO_CONNECT_SUPPORTED;
75 rc = class_connect(&conn, obd, cluuid);
76 if (rc) {
77 CERROR("can't connect %d\n", rc);
78 return rc;
79 }
80 *exp = class_conn2export(&conn);
81
82 return 0;
83 }
84
85 static int echo_disconnect(struct obd_export *exp)
86 {
87 LASSERT (exp != NULL);
88
89 return server_disconnect_export(exp);
90 }
91
92 static int echo_init_export(struct obd_export *exp)
93 {
94 return ldlm_init_export(exp);
95 }
96
97 static int echo_destroy_export(struct obd_export *exp)
98 {
99 target_destroy_export(exp);
100 ldlm_destroy_export(exp);
101
102 return 0;
103 }
104
105 static __u64 echo_next_id(struct obd_device *obddev)
106 {
107 obd_id id;
108
109 spin_lock(&obddev->u.echo.eo_lock);
110 id = ++obddev->u.echo.eo_lastino;
111 spin_unlock(&obddev->u.echo.eo_lock);
112
113 return id;
114 }
115
116 static int echo_create(const struct lu_env *env, struct obd_export *exp,
117 struct obdo *oa, struct lov_stripe_md **ea,
118 struct obd_trans_info *oti)
119 {
120 struct obd_device *obd = class_exp2obd(exp);
121
122 if (!obd) {
123 CERROR("invalid client cookie %#llx\n",
124 exp->exp_handle.h_cookie);
125 return -EINVAL;
126 }
127
128 if (!(oa->o_mode && S_IFMT)) {
129 CERROR("echo obd: no type!\n");
130 return -ENOENT;
131 }
132
133 if (!(oa->o_valid & OBD_MD_FLTYPE)) {
134 CERROR("invalid o_valid %#llx\n", oa->o_valid);
135 return -EINVAL;
136 }
137
138 ostid_set_seq_echo(&oa->o_oi);
139 ostid_set_id(&oa->o_oi, echo_next_id(obd));
140 oa->o_valid = OBD_MD_FLID;
141
142 return 0;
143 }
144
145 static int echo_destroy(const struct lu_env *env, struct obd_export *exp,
146 struct obdo *oa, struct lov_stripe_md *ea,
147 struct obd_trans_info *oti, struct obd_export *md_exp,
148 void *capa)
149 {
150 struct obd_device *obd = class_exp2obd(exp);
151
152 if (!obd) {
153 CERROR("invalid client cookie %#llx\n",
154 exp->exp_handle.h_cookie);
155 return -EINVAL;
156 }
157
158 if (!(oa->o_valid & OBD_MD_FLID)) {
159 CERROR("obdo missing FLID valid flag: %#llx\n", oa->o_valid);
160 return -EINVAL;
161 }
162
163 if (ostid_id(&oa->o_oi) > obd->u.echo.eo_lastino ||
164 ostid_id(&oa->o_oi) < ECHO_INIT_OID) {
165 CERROR("bad destroy objid: "DOSTID"\n", POSTID(&oa->o_oi));
166 return -EINVAL;
167 }
168
169 return 0;
170 }
171
172 static int echo_getattr(const struct lu_env *env, struct obd_export *exp,
173 struct obd_info *oinfo)
174 {
175 struct obd_device *obd = class_exp2obd(exp);
176 obd_id id = ostid_id(&oinfo->oi_oa->o_oi);
177
178 if (!obd) {
179 CERROR("invalid client cookie %#llx\n",
180 exp->exp_handle.h_cookie);
181 return -EINVAL;
182 }
183
184 if (!(oinfo->oi_oa->o_valid & OBD_MD_FLID)) {
185 CERROR("obdo missing FLID valid flag: %#llx\n",
186 oinfo->oi_oa->o_valid);
187 return -EINVAL;
188 }
189
190 obdo_cpy_md(oinfo->oi_oa, &obd->u.echo.eo_oa, oinfo->oi_oa->o_valid);
191 ostid_set_seq_echo(&oinfo->oi_oa->o_oi);
192 ostid_set_id(&oinfo->oi_oa->o_oi, id);
193
194 return 0;
195 }
196
197 static int echo_setattr(const struct lu_env *env, struct obd_export *exp,
198 struct obd_info *oinfo, struct obd_trans_info *oti)
199 {
200 struct obd_device *obd = class_exp2obd(exp);
201
202 if (!obd) {
203 CERROR("invalid client cookie %#llx\n",
204 exp->exp_handle.h_cookie);
205 return -EINVAL;
206 }
207
208 if (!(oinfo->oi_oa->o_valid & OBD_MD_FLID)) {
209 CERROR("obdo missing FLID valid flag: %#llx\n",
210 oinfo->oi_oa->o_valid);
211 return -EINVAL;
212 }
213
214 memcpy(&obd->u.echo.eo_oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
215
216 if (ostid_id(&oinfo->oi_oa->o_oi) & 4) {
217 /* Save lock to force ACKed reply */
218 ldlm_lock_addref (&obd->u.echo.eo_nl_lock, LCK_NL);
219 oti->oti_ack_locks[0].mode = LCK_NL;
220 oti->oti_ack_locks[0].lock = obd->u.echo.eo_nl_lock;
221 }
222
223 return 0;
224 }
225
226 static void
227 echo_page_debug_setup(struct page *page, int rw, obd_id id,
228 __u64 offset, int len)
229 {
230 int page_offset = offset & ~CFS_PAGE_MASK;
231 char *addr = ((char *)kmap(page)) + page_offset;
232
233 if (len % OBD_ECHO_BLOCK_SIZE != 0)
234 CERROR("Unexpected block size %d\n", len);
235
236 while (len > 0) {
237 if (rw & OBD_BRW_READ)
238 block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
239 offset, id);
240 else
241 block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
242 0xecc0ecc0ecc0ecc0ULL,
243 0xecc0ecc0ecc0ecc0ULL);
244
245 addr += OBD_ECHO_BLOCK_SIZE;
246 offset += OBD_ECHO_BLOCK_SIZE;
247 len -= OBD_ECHO_BLOCK_SIZE;
248 }
249
250 kunmap(page);
251 }
252
253 static int
254 echo_page_debug_check(struct page *page, obd_id id,
255 __u64 offset, int len)
256 {
257 int page_offset = offset & ~CFS_PAGE_MASK;
258 char *addr = ((char *)kmap(page)) + page_offset;
259 int rc = 0;
260 int rc2;
261
262 if (len % OBD_ECHO_BLOCK_SIZE != 0)
263 CERROR("Unexpected block size %d\n", len);
264
265 while (len > 0) {
266 rc2 = block_debug_check("echo", addr, OBD_ECHO_BLOCK_SIZE,
267 offset, id);
268
269 if (rc2 != 0 && rc == 0)
270 rc = rc2;
271
272 addr += OBD_ECHO_BLOCK_SIZE;
273 offset += OBD_ECHO_BLOCK_SIZE;
274 len -= OBD_ECHO_BLOCK_SIZE;
275 }
276
277 kunmap(page);
278
279 return (rc);
280 }
281
282 /* This allows us to verify that desc_private is passed unmolested */
283 #define DESC_PRIV 0x10293847
284
285 static int echo_map_nb_to_lb(struct obdo *oa, struct obd_ioobj *obj,
286 struct niobuf_remote *nb, int *pages,
287 struct niobuf_local *lb, int cmd, int *left)
288 {
289 int gfp_mask = (ostid_id(&obj->ioo_oid) & 1) ?
290 GFP_HIGHUSER : GFP_IOFS;
291 int ispersistent = ostid_id(&obj->ioo_oid) == ECHO_PERSISTENT_OBJID;
292 int debug_setup = (!ispersistent &&
293 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
294 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
295 struct niobuf_local *res = lb;
296 obd_off offset = nb->offset;
297 int len = nb->len;
298
299 while (len > 0) {
300 int plen = PAGE_CACHE_SIZE - (offset & (PAGE_CACHE_SIZE-1));
301 if (len < plen)
302 plen = len;
303
304 /* check for local buf overflow */
305 if (*left == 0)
306 return -EINVAL;
307
308 res->lnb_file_offset = offset;
309 res->len = plen;
310 LASSERT((res->lnb_file_offset & ~CFS_PAGE_MASK) + res->len <=
311 PAGE_CACHE_SIZE);
312
313 if (ispersistent &&
314 ((res->lnb_file_offset >> PAGE_CACHE_SHIFT) <
315 ECHO_PERSISTENT_PAGES)) {
316 res->page =
317 echo_persistent_pages[res->lnb_file_offset >>
318 PAGE_CACHE_SHIFT];
319 /* Take extra ref so __free_pages() can be called OK */
320 get_page (res->page);
321 } else {
322 OBD_PAGE_ALLOC(res->page, gfp_mask);
323 if (res->page == NULL) {
324 CERROR("can't get page for id " DOSTID"\n",
325 POSTID(&obj->ioo_oid));
326 return -ENOMEM;
327 }
328 }
329
330 CDEBUG(D_PAGE, "$$$$ get page %p @ %llu for %d\n",
331 res->page, res->lnb_file_offset, res->len);
332
333 if (cmd & OBD_BRW_READ)
334 res->rc = res->len;
335
336 if (debug_setup)
337 echo_page_debug_setup(res->page, cmd,
338 ostid_id(&obj->ioo_oid),
339 res->lnb_file_offset, res->len);
340
341 offset += plen;
342 len -= plen;
343 res++;
344
345 (*left)--;
346 (*pages)++;
347 }
348
349 return 0;
350 }
351
352 static int echo_finalize_lb(struct obdo *oa, struct obd_ioobj *obj,
353 struct niobuf_remote *rb, int *pgs,
354 struct niobuf_local *lb, int verify)
355 {
356 struct niobuf_local *res = lb;
357 obd_off start = rb->offset >> PAGE_CACHE_SHIFT;
358 obd_off end = (rb->offset + rb->len + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
359 int count = (int)(end - start);
360 int rc = 0;
361 int i;
362
363 for (i = 0; i < count; i++, (*pgs) ++, res++) {
364 struct page *page = res->page;
365 void *addr;
366
367 if (page == NULL) {
368 CERROR("null page objid %llu:%p, buf %d/%d\n",
369 ostid_id(&obj->ioo_oid), page, i,
370 obj->ioo_bufcnt);
371 return -EFAULT;
372 }
373
374 addr = kmap(page);
375
376 CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@%llu\n",
377 res->page, addr, res->lnb_file_offset);
378
379 if (verify) {
380 int vrc = echo_page_debug_check(page,
381 ostid_id(&obj->ioo_oid),
382 res->lnb_file_offset,
383 res->len);
384 /* check all the pages always */
385 if (vrc != 0 && rc == 0)
386 rc = vrc;
387 }
388
389 kunmap(page);
390 /* NB see comment above regarding persistent pages */
391 OBD_PAGE_FREE(page);
392 }
393
394 return rc;
395 }
396
397 static int echo_preprw(const struct lu_env *env, int cmd,
398 struct obd_export *export, struct obdo *oa,
399 int objcount, struct obd_ioobj *obj,
400 struct niobuf_remote *nb, int *pages,
401 struct niobuf_local *res, struct obd_trans_info *oti,
402 struct lustre_capa *unused)
403 {
404 struct obd_device *obd;
405 int tot_bytes = 0;
406 int rc = 0;
407 int i, left;
408
409 obd = export->exp_obd;
410 if (obd == NULL)
411 return -EINVAL;
412
413 /* Temp fix to stop falling foul of osc_announce_cached() */
414 oa->o_valid &= ~(OBD_MD_FLBLOCKS | OBD_MD_FLGRANT);
415
416 memset(res, 0, sizeof(*res) * *pages);
417
418 CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
419 cmd == OBD_BRW_READ ? "reading" : "writing", objcount, *pages);
420
421 if (oti)
422 oti->oti_handle = (void *)DESC_PRIV;
423
424 left = *pages;
425 *pages = 0;
426
427 for (i = 0; i < objcount; i++, obj++) {
428 int j;
429
430 for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++) {
431
432 rc = echo_map_nb_to_lb(oa, obj, nb, pages,
433 res + *pages, cmd, &left);
434 if (rc)
435 GOTO(preprw_cleanup, rc);
436
437 tot_bytes += nb->len;
438 }
439 }
440
441 atomic_add(*pages, &obd->u.echo.eo_prep);
442
443 if (cmd & OBD_BRW_READ)
444 lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_READ_BYTES,
445 tot_bytes);
446 else
447 lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
448 tot_bytes);
449
450 CDEBUG(D_PAGE, "%d pages allocated after prep\n",
451 atomic_read(&obd->u.echo.eo_prep));
452
453 return 0;
454
455 preprw_cleanup:
456 /* It is possible that we would rather handle errors by allow
457 * any already-set-up pages to complete, rather than tearing them
458 * all down again. I believe that this is what the in-kernel
459 * prep/commit operations do.
460 */
461 CERROR("cleaning up %u pages (%d obdos)\n", *pages, objcount);
462 for (i = 0; i < *pages; i++) {
463 kunmap(res[i].page);
464 /* NB if this is a persistent page, __free_pages will just
465 * lose the extra ref gained above */
466 OBD_PAGE_FREE(res[i].page);
467 res[i].page = NULL;
468 atomic_dec(&obd->u.echo.eo_prep);
469 }
470
471 return rc;
472 }
473
474 static int echo_commitrw(const struct lu_env *env, int cmd,
475 struct obd_export *export, struct obdo *oa,
476 int objcount, struct obd_ioobj *obj,
477 struct niobuf_remote *rb, int niocount,
478 struct niobuf_local *res, struct obd_trans_info *oti,
479 int rc)
480 {
481 struct obd_device *obd;
482 int pgs = 0;
483 int i;
484
485 obd = export->exp_obd;
486 if (obd == NULL)
487 return -EINVAL;
488
489 if (rc)
490 GOTO(commitrw_cleanup, rc);
491
492 if ((cmd & OBD_BRW_RWMASK) == OBD_BRW_READ) {
493 CDEBUG(D_PAGE, "reading %d obdos with %d IOs\n",
494 objcount, niocount);
495 } else {
496 CDEBUG(D_PAGE, "writing %d obdos with %d IOs\n",
497 objcount, niocount);
498 }
499
500 if (niocount && res == NULL) {
501 CERROR("NULL res niobuf with niocount %d\n", niocount);
502 return -EINVAL;
503 }
504
505 LASSERT(oti == NULL || oti->oti_handle == (void *)DESC_PRIV);
506
507 for (i = 0; i < objcount; i++, obj++) {
508 int verify = (rc == 0 &&
509 ostid_id(&obj->ioo_oid) != ECHO_PERSISTENT_OBJID &&
510 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
511 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
512 int j;
513
514 for (j = 0 ; j < obj->ioo_bufcnt ; j++, rb++) {
515 int vrc = echo_finalize_lb(oa, obj, rb, &pgs, &res[pgs],
516 verify);
517 if (vrc == 0)
518 continue;
519
520 if (vrc == -EFAULT)
521 GOTO(commitrw_cleanup, rc = vrc);
522
523 if (rc == 0)
524 rc = vrc;
525 }
526
527 }
528
529 atomic_sub(pgs, &obd->u.echo.eo_prep);
530
531 CDEBUG(D_PAGE, "%d pages remain after commit\n",
532 atomic_read(&obd->u.echo.eo_prep));
533 return rc;
534
535 commitrw_cleanup:
536 atomic_sub(pgs, &obd->u.echo.eo_prep);
537
538 CERROR("cleaning up %d pages (%d obdos)\n",
539 niocount - pgs - 1, objcount);
540
541 while (pgs < niocount) {
542 struct page *page = res[pgs++].page;
543
544 if (page == NULL)
545 continue;
546
547 /* NB see comment above regarding persistent pages */
548 OBD_PAGE_FREE(page);
549 atomic_dec(&obd->u.echo.eo_prep);
550 }
551 return rc;
552 }
553
554 static int echo_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
555 {
556 struct lprocfs_static_vars lvars;
557 int rc;
558 __u64 lock_flags = 0;
559 struct ldlm_res_id res_id = {.name = {1}};
560 char ns_name[48];
561
562 obd->u.echo.eo_obt.obt_magic = OBT_MAGIC;
563 spin_lock_init(&obd->u.echo.eo_lock);
564 obd->u.echo.eo_lastino = ECHO_INIT_OID;
565
566 sprintf(ns_name, "echotgt-%s", obd->obd_uuid.uuid);
567 obd->obd_namespace = ldlm_namespace_new(obd, ns_name,
568 LDLM_NAMESPACE_SERVER,
569 LDLM_NAMESPACE_MODEST,
570 LDLM_NS_TYPE_OST);
571 if (obd->obd_namespace == NULL) {
572 LBUG();
573 return -ENOMEM;
574 }
575
576 rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id, LDLM_PLAIN,
577 NULL, LCK_NL, &lock_flags, NULL,
578 ldlm_completion_ast, NULL, NULL, 0,
579 LVB_T_NONE, NULL, &obd->u.echo.eo_nl_lock);
580 LASSERT (rc == ELDLM_OK);
581
582 lprocfs_echo_init_vars(&lvars);
583 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0 &&
584 lprocfs_alloc_obd_stats(obd, LPROC_ECHO_LAST) == 0) {
585 lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_READ_BYTES,
586 LPROCFS_CNTR_AVGMINMAX,
587 "read_bytes", "bytes");
588 lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
589 LPROCFS_CNTR_AVGMINMAX,
590 "write_bytes", "bytes");
591 }
592
593 ptlrpc_init_client (LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
594 "echo_ldlm_cb_client", &obd->obd_ldlm_client);
595 return 0;
596 }
597
598 static int echo_cleanup(struct obd_device *obd)
599 {
600 int leaked;
601
602 lprocfs_obd_cleanup(obd);
603 lprocfs_free_obd_stats(obd);
604
605 ldlm_lock_decref(&obd->u.echo.eo_nl_lock, LCK_NL);
606
607 /* XXX Bug 3413; wait for a bit to ensure the BL callback has
608 * happened before calling ldlm_namespace_free() */
609 set_current_state(TASK_UNINTERRUPTIBLE);
610 schedule_timeout(cfs_time_seconds(1));
611
612 ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
613 obd->obd_namespace = NULL;
614
615 leaked = atomic_read(&obd->u.echo.eo_prep);
616 if (leaked != 0)
617 CERROR("%d prep/commitrw pages leaked\n", leaked);
618
619 return 0;
620 }
621
622 struct obd_ops echo_obd_ops = {
623 .o_owner = THIS_MODULE,
624 .o_connect = echo_connect,
625 .o_disconnect = echo_disconnect,
626 .o_init_export = echo_init_export,
627 .o_destroy_export = echo_destroy_export,
628 .o_create = echo_create,
629 .o_destroy = echo_destroy,
630 .o_getattr = echo_getattr,
631 .o_setattr = echo_setattr,
632 .o_preprw = echo_preprw,
633 .o_commitrw = echo_commitrw,
634 .o_setup = echo_setup,
635 .o_cleanup = echo_cleanup
636 };
637
638 void echo_persistent_pages_fini(void)
639 {
640 int i;
641
642 for (i = 0; i < ECHO_PERSISTENT_PAGES; i++)
643 if (echo_persistent_pages[i] != NULL) {
644 OBD_PAGE_FREE(echo_persistent_pages[i]);
645 echo_persistent_pages[i] = NULL;
646 }
647 }
648
649 int echo_persistent_pages_init(void)
650 {
651 struct page *pg;
652 int i;
653
654 for (i = 0; i < ECHO_PERSISTENT_PAGES; i++) {
655 int gfp_mask = (i < ECHO_PERSISTENT_PAGES/2) ?
656 GFP_IOFS : GFP_HIGHUSER;
657
658 OBD_PAGE_ALLOC(pg, gfp_mask);
659 if (pg == NULL) {
660 echo_persistent_pages_fini ();
661 return (-ENOMEM);
662 }
663
664 memset (kmap (pg), 0, PAGE_CACHE_SIZE);
665 kunmap (pg);
666
667 echo_persistent_pages[i] = pg;
668 }
669
670 return (0);
671 }
Linux kernel - Deliverables
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