4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_ECHO
38 #include "../../include/linux/libcfs/libcfs.h"
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"
46 #include "../include/lustre_fid.h"
47 #include "../include/lustre_acl.h"
48 #include "../include/lustre_net.h"
50 #include "echo_internal.h"
52 /** \defgroup echo_client Echo Client
57 struct cl_device ed_cl;
58 struct echo_client_obd *ed_ec;
60 struct cl_site ed_site_myself;
61 struct cl_site *ed_site;
62 struct lu_device *ed_next;
67 struct cl_object eo_cl;
68 struct cl_object_header eo_hdr;
70 struct echo_device *eo_dev;
71 struct list_head eo_obj_chain;
72 struct lov_stripe_md *eo_lsm;
77 struct echo_object_conf {
78 struct cl_object_conf eoc_cl;
79 struct lov_stripe_md **eoc_md;
83 struct cl_page_slice ep_cl;
85 struct page *ep_vmpage;
89 struct cl_lock_slice el_cl;
90 struct list_head el_chain;
91 struct echo_object *el_object;
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);
101 /** \defgroup echo_helpers Helper functions
104 static inline struct echo_device *cl2echo_dev(const struct cl_device *dev)
106 return container_of0(dev, struct echo_device, ed_cl);
109 static inline struct cl_device *echo_dev2cl(struct echo_device *d)
114 static inline struct echo_device *obd2echo_dev(const struct obd_device *obd)
116 return cl2echo_dev(lu2cl_dev(obd->obd_lu_dev));
119 static inline struct cl_object *echo_obj2cl(struct echo_object *eco)
124 static inline struct echo_object *cl2echo_obj(const struct cl_object *o)
126 return container_of(o, struct echo_object, eo_cl);
129 static inline struct echo_page *cl2echo_page(const struct cl_page_slice *s)
131 return container_of(s, struct echo_page, ep_cl);
134 static inline struct echo_lock *cl2echo_lock(const struct cl_lock_slice *s)
136 return container_of(s, struct echo_lock, el_cl);
139 static inline struct cl_lock *echo_lock2cl(const struct echo_lock *ecl)
141 return ecl->el_cl.cls_lock;
144 static struct lu_context_key echo_thread_key;
145 static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
147 struct echo_thread_info *info;
149 info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
150 LASSERT(info != NULL);
155 struct echo_object_conf *cl2echo_conf(const struct cl_object_conf *c)
157 return container_of(c, struct echo_object_conf, eoc_cl);
160 /** @} echo_helpers */
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);
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,
169 struct page **pages, int npages, int async);
171 static struct echo_thread_info *echo_env_info(const struct lu_env *env);
173 struct echo_thread_info {
174 struct echo_object_conf eti_conf;
175 struct lustre_md eti_md;
177 struct cl_2queue eti_queue;
179 struct cl_lock_descr eti_descr;
180 struct lu_fid eti_fid;
181 struct lu_fid eti_fid2;
184 /* No session used right now */
185 struct echo_session_info {
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;
194 static struct lu_kmem_descr echo_caches[] = {
196 .ckd_cache = &echo_lock_kmem,
197 .ckd_name = "echo_lock_kmem",
198 .ckd_size = sizeof(struct echo_lock)
201 .ckd_cache = &echo_object_kmem,
202 .ckd_name = "echo_object_kmem",
203 .ckd_size = sizeof(struct echo_object)
206 .ckd_cache = &echo_thread_kmem,
207 .ckd_name = "echo_thread_kmem",
208 .ckd_size = sizeof(struct echo_thread_info)
211 .ckd_cache = &echo_session_kmem,
212 .ckd_name = "echo_session_kmem",
213 .ckd_size = sizeof(struct echo_session_info)
220 /** \defgroup echo_page Page operations
222 * Echo page operations.
226 static struct page *echo_page_vmpage(const struct lu_env *env,
227 const struct cl_page_slice *slice)
229 return cl2echo_page(slice)->ep_vmpage;
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)
236 struct echo_page *ep = cl2echo_page(slice);
239 mutex_lock(&ep->ep_lock);
240 else if (!mutex_trylock(&ep->ep_lock))
245 static void echo_page_disown(const struct lu_env *env,
246 const struct cl_page_slice *slice,
249 struct echo_page *ep = cl2echo_page(slice);
251 LASSERT(mutex_is_locked(&ep->ep_lock));
252 mutex_unlock(&ep->ep_lock);
255 static void echo_page_discard(const struct lu_env *env,
256 const struct cl_page_slice *slice,
257 struct cl_io *unused)
259 cl_page_delete(env, slice->cpl_page);
262 static int echo_page_is_vmlocked(const struct lu_env *env,
263 const struct cl_page_slice *slice)
265 if (mutex_is_locked(&cl2echo_page(slice)->ep_lock))
270 static void echo_page_completion(const struct lu_env *env,
271 const struct cl_page_slice *slice,
274 LASSERT(slice->cpl_page->cp_sync_io != NULL);
277 static void echo_page_fini(const struct lu_env *env,
278 struct cl_page_slice *slice)
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;
284 atomic_dec(&eco->eo_npages);
285 page_cache_release(vmpage);
288 static int echo_page_prep(const struct lu_env *env,
289 const struct cl_page_slice *slice,
290 struct cl_io *unused)
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)
299 struct echo_page *ep = cl2echo_page(slice);
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);
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,
316 .cpo_prep = echo_page_prep,
317 .cpo_completion = echo_page_completion,
320 .cpo_prep = echo_page_prep,
321 .cpo_completion = echo_page_completion,
328 /** \defgroup echo_lock Locking
330 * echo lock operations
334 static void echo_lock_fini(const struct lu_env *env,
335 struct cl_lock_slice *slice)
337 struct echo_lock *ecl = cl2echo_lock(slice);
339 LASSERT(list_empty(&ecl->el_chain));
340 kmem_cache_free(echo_lock_kmem, ecl);
343 static void echo_lock_delete(const struct lu_env *env,
344 const struct cl_lock_slice *slice)
346 struct echo_lock *ecl = cl2echo_lock(slice);
348 LASSERT(list_empty(&ecl->el_chain));
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)
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
367 /** \defgroup echo_cl_ops cl_object operations
369 * operations for cl_object
373 static int echo_page_init(const struct lu_env *env, struct cl_object *obj,
374 struct cl_page *page, struct page *vmpage)
376 struct echo_page *ep = cl_object_page_slice(obj, page);
377 struct echo_object *eco = cl2echo_obj(obj);
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);
387 static int echo_io_init(const struct lu_env *env, struct cl_object *obj,
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)
397 struct echo_lock *el;
399 el = kmem_cache_alloc(echo_lock_kmem, GFP_NOFS | __GFP_ZERO);
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);
406 return el == NULL ? -ENOMEM : 0;
409 static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
410 const struct cl_object_conf *conf)
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
422 /** @} echo_cl_ops */
424 /** \defgroup echo_lu_ops lu_object operations
426 * operations for echo lu object.
430 static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
431 const struct lu_object_conf *conf)
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));
436 const struct cl_object_conf *cconf;
437 struct echo_object_conf *econf;
440 struct lu_object *below;
441 struct lu_device *under;
444 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
448 lu_object_add(obj, below);
451 cconf = lu2cl_conf(conf);
452 econf = cl2echo_conf(cconf);
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;
460 atomic_set(&eco->eo_npages, 0);
461 cl_object_page_init(lu2cl(obj), sizeof(struct echo_page));
463 spin_lock(&ec->ec_lock);
464 list_add_tail(&eco->eo_obj_chain, &ec->ec_objects);
465 spin_unlock(&ec->ec_lock);
470 /* taken from osc_unpackmd() */
471 static int echo_alloc_memmd(struct echo_device *ed,
472 struct lov_stripe_md **lsmp)
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);
482 LASSERT(*lsmp == NULL);
483 *lsmp = kzalloc(lsm_size, GFP_NOFS);
487 (*lsmp)->lsm_oinfo[0] = kzalloc(sizeof(struct lov_oinfo), GFP_NOFS);
488 if (!(*lsmp)->lsm_oinfo[0]) {
493 loi_init((*lsmp)->lsm_oinfo[0]);
494 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
495 ostid_set_seq_echo(&(*lsmp)->lsm_oi);
500 static int echo_free_memmd(struct echo_device *ed, struct lov_stripe_md **lsmp)
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);
510 LASSERT(*lsmp != NULL);
511 kfree((*lsmp)->lsm_oinfo[0]);
517 static void echo_object_free(const struct lu_env *env, struct lu_object *obj)
519 struct echo_object *eco = cl2echo_obj(lu2cl(obj));
520 struct echo_client_obd *ec = eco->eo_dev->ed_ec;
522 LASSERT(atomic_read(&eco->eo_npages) == 0);
524 spin_lock(&ec->ec_lock);
525 list_del_init(&eco->eo_obj_chain);
526 spin_unlock(&ec->ec_lock);
529 lu_object_header_fini(obj->lo_header);
532 echo_free_memmd(eco->eo_dev, &eco->eo_lsm);
533 kmem_cache_free(echo_object_kmem, eco);
536 static int echo_object_print(const struct lu_env *env, void *cookie,
537 lu_printer_t p, const struct lu_object *o)
539 struct echo_object *obj = cl2echo_obj(lu2cl(o));
541 return (*p)(env, cookie, "echoclient-object@%p", obj);
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
553 /** @} echo_lu_ops */
555 /** \defgroup echo_lu_dev_ops lu_device operations
557 * Operations for echo lu device.
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)
565 struct echo_object *eco;
566 struct lu_object *obj = NULL;
568 /* we're the top dev. */
569 LASSERT(hdr == NULL);
570 eco = kmem_cache_alloc(echo_object_kmem, GFP_NOFS | __GFP_ZERO);
572 struct cl_object_header *hdr = &eco->eo_hdr;
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);
579 eco->eo_cl.co_ops = &echo_cl_obj_ops;
580 obj->lo_ops = &echo_lu_obj_ops;
585 static struct lu_device_operations echo_device_lu_ops = {
586 .ldo_object_alloc = echo_object_alloc,
589 /** @} echo_lu_dev_ops */
591 static struct cl_device_operations echo_device_cl_ops = {
594 /** \defgroup echo_init Setup and teardown
596 * Init and fini functions for echo client.
600 static int echo_site_init(const struct lu_env *env, struct echo_device *ed)
602 struct cl_site *site = &ed->ed_site_myself;
605 /* initialize site */
606 rc = cl_site_init(site, &ed->ed_cl);
608 CERROR("Cannot initialize site for echo client(%d)\n", rc);
612 rc = lu_site_init_finish(&site->cs_lu);
620 static void echo_site_fini(const struct lu_env *env, struct echo_device *ed)
623 cl_site_fini(ed->ed_site);
628 static void *echo_thread_key_init(const struct lu_context *ctx,
629 struct lu_context_key *key)
631 struct echo_thread_info *info;
633 info = kmem_cache_alloc(echo_thread_kmem, GFP_NOFS | __GFP_ZERO);
635 info = ERR_PTR(-ENOMEM);
639 static void echo_thread_key_fini(const struct lu_context *ctx,
640 struct lu_context_key *key, void *data)
642 struct echo_thread_info *info = data;
644 kmem_cache_free(echo_thread_kmem, info);
647 static void echo_thread_key_exit(const struct lu_context *ctx,
648 struct lu_context_key *key, void *data)
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
659 static void *echo_session_key_init(const struct lu_context *ctx,
660 struct lu_context_key *key)
662 struct echo_session_info *session;
664 session = kmem_cache_alloc(echo_session_kmem, GFP_NOFS | __GFP_ZERO);
666 session = ERR_PTR(-ENOMEM);
670 static void echo_session_key_fini(const struct lu_context *ctx,
671 struct lu_context_key *key, void *data)
673 struct echo_session_info *session = data;
675 kmem_cache_free(echo_session_kmem, session);
678 static void echo_session_key_exit(const struct lu_context *ctx,
679 struct lu_context_key *key, void *data)
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
690 LU_TYPE_INIT_FINI(echo, &echo_thread_key, &echo_session_key);
692 static struct lu_device *echo_device_alloc(const struct lu_env *env,
693 struct lu_device_type *t,
694 struct lustre_cfg *cfg)
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;
705 ed = kzalloc(sizeof(*ed), GFP_NOFS);
713 rc = cl_device_init(cd, t);
717 cd->cd_lu_dev.ld_ops = &echo_device_lu_ops;
718 cd->cd_ops = &echo_device_cl_ops;
721 obd = class_name2obd(lustre_cfg_string(cfg, 0));
722 LASSERT(obd != NULL);
723 LASSERT(env != NULL);
725 tgt = class_name2obd(lustre_cfg_string(cfg, 1));
727 CERROR("Can not find tgt device %s\n",
728 lustre_cfg_string(cfg, 1));
733 next = tgt->obd_lu_dev;
734 if (!strcmp(tgt->obd_type->typ_name, LUSTRE_MDT_NAME)) {
735 CERROR("echo MDT client must be run on server\n");
740 rc = echo_site_init(env, ed);
746 rc = echo_client_setup(env, obd, cfg);
750 ed->ed_ec = &obd->u.echo_client;
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))
758 tgt_type_name = tgt->obd_type->typ_name;
760 LASSERT(next != NULL);
761 if (next->ld_site != NULL) {
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,
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;
779 LASSERT(strcmp(tgt_type_name,
780 LUSTRE_OSC_NAME) == 0);
782 LASSERT(strcmp(tgt_type_name, LUSTRE_OST_NAME) == 0);
786 return &cd->cd_lu_dev;
792 rc2 = echo_client_cleanup(obd);
794 CERROR("Cleanup obd device %s error(%d)\n",
799 echo_site_fini(env, ed);
801 cl_device_fini(&ed->ed_cl);
811 static int echo_device_init(const struct lu_env *env, struct lu_device *d,
812 const char *name, struct lu_device *next)
818 static struct lu_device *echo_device_fini(const struct lu_env *env,
821 struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
822 struct lu_device *next = ed->ed_next;
825 next = next->ld_type->ldt_ops->ldto_device_fini(env, next);
829 static void echo_lock_release(const struct lu_env *env,
830 struct echo_lock *ecl,
833 struct cl_lock *clk = echo_lock2cl(ecl);
837 cl_lock_release(env, clk, "ec enqueue", ecl->el_object);
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);
844 cl_lock_put(env, clk);
847 static struct lu_device *echo_device_free(const struct lu_env *env,
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;
855 CDEBUG(D_INFO, "echo device:%p is going to be freed, next = %p\n",
858 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
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.
865 spin_lock(&ec->ec_lock);
866 list_for_each_entry(eco, &ec->ec_objects, eo_obj_chain)
868 spin_unlock(&ec->ec_lock);
871 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
874 "Waiting for the reference of echo object to be dropped\n");
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);
880 CERROR("echo_client still has objects at cleanup time, wait for 1 second\n");
881 set_current_state(TASK_UNINTERRUPTIBLE);
882 schedule_timeout(cfs_time_seconds(1));
883 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
884 spin_lock(&ec->ec_lock);
886 spin_unlock(&ec->ec_lock);
888 LASSERT(list_empty(&ec->ec_locks));
890 CDEBUG(D_INFO, "No object exists, exiting...\n");
892 echo_client_cleanup(d->ld_obd);
895 next = next->ld_type->ldt_ops->ldto_device_free(env, next);
897 LASSERT(ed->ed_site == lu2cl_site(d->ld_site));
898 echo_site_fini(env, ed);
899 cl_device_fini(&ed->ed_cl);
905 static const struct lu_device_type_operations echo_device_type_ops = {
906 .ldto_init = echo_type_init,
907 .ldto_fini = echo_type_fini,
909 .ldto_start = echo_type_start,
910 .ldto_stop = echo_type_stop,
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
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,
922 .ldt_ctx_tags = LCT_CL_THREAD,
927 /** \defgroup echo_exports Exported operations
929 * exporting functions to echo client
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)
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;
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));
955 /* Never return an object if the obd is to be freed. */
956 if (echo_dev2cl(d)->cd_lu_dev.ld_obd->obd_stopping)
957 return ERR_PTR(-ENODEV);
959 env = cl_env_get(&refcheck);
963 info = echo_env_info(env);
964 conf = &info->eti_conf;
966 if (!d->ed_next_islov) {
967 struct lov_oinfo *oinfo = lsm->lsm_oinfo[0];
969 LASSERT(oinfo != NULL);
970 oinfo->loi_oi = lsm->lsm_oi;
971 conf->eoc_cl.u.coc_oinfo = oinfo;
973 struct lustre_md *md;
976 memset(md, 0, sizeof(*md));
978 conf->eoc_cl.u.coc_md = md;
983 fid = &info->eti_fid;
984 rc = ostid_to_fid(fid, &lsm->lsm_oi, 0);
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);
999 eco = cl2echo_obj(obj);
1000 if (eco->eo_deleted) {
1001 cl_object_put(env, obj);
1002 eco = ERR_PTR(-EAGAIN);
1006 cl_env_put(env, &refcheck);
1010 static int cl_echo_object_put(struct echo_object *eco)
1013 struct cl_object *obj = echo_obj2cl(eco);
1016 env = cl_env_get(&refcheck);
1018 return PTR_ERR(env);
1020 /* an external function to kill an object? */
1021 if (eco->eo_deleted) {
1022 struct lu_object_header *loh = obj->co_lu.lo_header;
1024 LASSERT(&eco->eo_hdr == luh2coh(loh));
1025 set_bit(LU_OBJECT_HEARD_BANSHEE, &loh->loh_flags);
1028 cl_object_put(env, obj);
1029 cl_env_put(env, &refcheck);
1033 static int cl_echo_enqueue0(struct lu_env *env, struct echo_object *eco,
1034 u64 start, u64 end, int mode,
1035 __u64 *cookie, __u32 enqflags)
1038 struct cl_lock *lck;
1039 struct cl_object *obj;
1040 struct cl_lock_descr *descr;
1041 struct echo_thread_info *info;
1044 info = echo_env_info(env);
1046 descr = &info->eti_descr;
1047 obj = echo_obj2cl(eco);
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;
1056 lck = cl_lock_request(env, io, descr, "ec enqueue", eco);
1058 struct echo_client_obd *ec = eco->eo_dev->ed_ec;
1059 struct echo_lock *el;
1061 rc = cl_wait(env, lck);
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;
1069 atomic_inc(&el->el_refcount);
1070 *cookie = el->el_cookie;
1071 spin_unlock(&ec->ec_lock);
1073 cl_lock_release(env, lck, "ec enqueue", current);
1079 static int cl_echo_enqueue(struct echo_object *eco, u64 start, u64 end,
1080 int mode, __u64 *cookie)
1082 struct echo_thread_info *info;
1088 env = cl_env_get(&refcheck);
1090 return PTR_ERR(env);
1092 info = echo_env_info(env);
1095 io->ci_ignore_layout = 1;
1096 result = cl_io_init(env, io, CIT_MISC, echo_obj2cl(eco));
1099 LASSERT(result == 0);
1101 result = cl_echo_enqueue0(env, eco, start, end, mode, cookie, 0);
1102 cl_io_fini(env, io);
1105 cl_env_put(env, &refcheck);
1109 static int cl_echo_cancel0(struct lu_env *env, struct echo_device *ed,
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;
1117 LASSERT(ec != NULL);
1118 spin_lock(&ec->ec_lock);
1119 list_for_each(el, &ec->ec_locks) {
1120 ecl = list_entry(el, struct echo_lock, el_chain);
1121 CDEBUG(D_INFO, "ecl: %p, cookie: %#llx\n", ecl, ecl->el_cookie);
1122 found = (ecl->el_cookie == cookie);
1124 if (atomic_dec_and_test(&ecl->el_refcount))
1125 list_del_init(&ecl->el_chain);
1131 spin_unlock(&ec->ec_lock);
1136 echo_lock_release(env, ecl, still_used);
1140 static int cl_echo_cancel(struct echo_device *ed, __u64 cookie)
1146 env = cl_env_get(&refcheck);
1148 return PTR_ERR(env);
1150 rc = cl_echo_cancel0(env, ed, cookie);
1152 cl_env_put(env, &refcheck);
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)
1159 struct cl_page *clp;
1160 struct cl_page *temp;
1163 cl_page_list_for_each_safe(clp, temp, &queue->c2_qin) {
1166 rc = cl_page_cache_add(env, io, clp, CRT_WRITE);
1169 result = result ?: rc;
1174 static int cl_echo_object_brw(struct echo_object *eco, int rw, u64 offset,
1175 struct page **pages, int npages, int async)
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;
1183 struct cl_page *clp;
1184 struct lustre_handle lh = { 0 };
1185 int page_size = cl_page_size(obj);
1190 LASSERT((offset & ~CFS_PAGE_MASK) == 0);
1191 LASSERT(ed->ed_next != NULL);
1192 env = cl_env_get(&refcheck);
1194 return PTR_ERR(env);
1196 info = echo_env_info(env);
1198 queue = &info->eti_queue;
1200 cl_2queue_init(queue);
1202 io->ci_ignore_layout = 1;
1203 rc = cl_io_init(env, io, CIT_MISC, obj);
1208 rc = cl_echo_enqueue0(env, eco, offset,
1209 offset + npages * PAGE_CACHE_SIZE - 1,
1210 rw == READ ? LCK_PR : LCK_PW, &lh.cookie,
1215 for (i = 0; i < npages; i++) {
1217 clp = cl_page_find(env, obj, cl_index(obj, offset),
1218 pages[i], CPT_TRANSIENT);
1223 LASSERT(clp->cp_type == CPT_TRANSIENT);
1225 rc = cl_page_own(env, io, clp);
1227 LASSERT(clp->cp_state == CPS_FREEING);
1228 cl_page_put(env, clp);
1232 cl_2queue_add(queue, clp);
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);
1239 offset += page_size;
1243 enum cl_req_type typ = rw == READ ? CRT_READ : CRT_WRITE;
1245 async = async && (typ == CRT_WRITE);
1247 rc = cl_echo_async_brw(env, io, typ, queue);
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);
1254 cl_echo_cancel0(env, ed, lh.cookie);
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);
1261 cl_env_put(env, &refcheck);
1265 /** @} echo_exports */
1267 static u64 last_object_id;
1270 echo_copyout_lsm(struct lov_stripe_md *lsm, void *_ulsm, int ulsm_nob)
1272 struct lov_stripe_md *ulsm = _ulsm;
1273 struct lov_oinfo **p;
1276 nob = offsetof(struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]);
1280 if (copy_to_user(ulsm, lsm, sizeof(*ulsm)))
1283 for (i = 0, p = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++, p++) {
1284 struct lov_oinfo __user *up;
1285 if (get_user(up, ulsm->lsm_oinfo + i) ||
1286 copy_to_user(up, *p, sizeof(struct lov_oinfo)))
1293 echo_copyin_lsm(struct echo_device *ed, struct lov_stripe_md *lsm,
1294 struct lov_stripe_md __user *ulsm, int ulsm_nob)
1296 struct echo_client_obd *ec = ed->ed_ec;
1297 struct lov_oinfo **p;
1300 if (ulsm_nob < sizeof(*lsm))
1303 if (copy_from_user(lsm, ulsm, sizeof(*lsm)))
1306 if (lsm->lsm_stripe_count > ec->ec_nstripes ||
1307 lsm->lsm_magic != LOV_MAGIC ||
1308 (lsm->lsm_stripe_size & (~CFS_PAGE_MASK)) != 0 ||
1309 ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL))
1312 for (i = 0, p = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++, p++) {
1313 struct lov_oinfo __user *up;
1314 if (get_user(up, ulsm->lsm_oinfo + i) ||
1315 copy_from_user(*p, up, sizeof(struct lov_oinfo)))
1321 static int echo_create_object(const struct lu_env *env, struct echo_device *ed,
1322 int on_target, struct obdo *oa, void *ulsm,
1323 int ulsm_nob, struct obd_trans_info *oti)
1325 struct echo_object *eco;
1326 struct echo_client_obd *ec = ed->ed_ec;
1327 struct lov_stripe_md *lsm = NULL;
1331 if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */
1332 (on_target || /* set_stripe */
1333 ec->ec_nstripes != 0)) { /* LOV */
1334 CERROR("No valid oid\n");
1338 rc = echo_alloc_memmd(ed, &lsm);
1340 CERROR("Cannot allocate md: rc = %d\n", rc);
1347 rc = echo_copyin_lsm(ed, lsm, ulsm, ulsm_nob);
1351 if (lsm->lsm_stripe_count == 0)
1352 lsm->lsm_stripe_count = ec->ec_nstripes;
1354 if (lsm->lsm_stripe_size == 0)
1355 lsm->lsm_stripe_size = PAGE_CACHE_SIZE;
1359 /* setup stripes: indices + default ids if required */
1360 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1361 if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) == 0)
1362 lsm->lsm_oinfo[i]->loi_oi = lsm->lsm_oi;
1364 lsm->lsm_oinfo[i]->loi_ost_idx =
1365 (idx + i) % ec->ec_nstripes;
1369 /* setup object ID here for !on_target and LOV hint */
1370 if (oa->o_valid & OBD_MD_FLID) {
1371 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1372 lsm->lsm_oi = oa->o_oi;
1375 if (ostid_id(&lsm->lsm_oi) == 0)
1376 ostid_set_id(&lsm->lsm_oi, ++last_object_id);
1380 /* Only echo objects are allowed to be created */
1381 LASSERT((oa->o_valid & OBD_MD_FLGROUP) &&
1382 (ostid_seq(&oa->o_oi) == FID_SEQ_ECHO));
1383 rc = obd_create(env, ec->ec_exp, oa, &lsm, oti);
1385 CERROR("Cannot create objects: rc = %d\n", rc);
1391 /* See what object ID we were given */
1392 oa->o_oi = lsm->lsm_oi;
1393 oa->o_valid |= OBD_MD_FLID;
1395 eco = cl_echo_object_find(ed, &lsm);
1400 cl_echo_object_put(eco);
1402 CDEBUG(D_INFO, "oa oid "DOSTID"\n", POSTID(&oa->o_oi));
1406 obd_destroy(env, ec->ec_exp, oa, lsm, oti, NULL);
1408 echo_free_memmd(ed, &lsm);
1410 CERROR("create object failed with: rc = %d\n", rc);
1414 static int echo_get_object(struct echo_object **ecop, struct echo_device *ed,
1417 struct lov_stripe_md *lsm = NULL;
1418 struct echo_object *eco;
1421 if ((oa->o_valid & OBD_MD_FLID) == 0 || ostid_id(&oa->o_oi) == 0) {
1422 /* disallow use of object id 0 */
1423 CERROR("No valid oid\n");
1427 rc = echo_alloc_memmd(ed, &lsm);
1431 lsm->lsm_oi = oa->o_oi;
1432 if (!(oa->o_valid & OBD_MD_FLGROUP))
1433 ostid_set_seq_echo(&lsm->lsm_oi);
1436 eco = cl_echo_object_find(ed, &lsm);
1442 echo_free_memmd(ed, &lsm);
1446 static void echo_put_object(struct echo_object *eco)
1448 if (cl_echo_object_put(eco))
1449 CERROR("echo client: drop an object failed");
1453 echo_get_stripe_off_id(struct lov_stripe_md *lsm, u64 *offp, u64 *idp)
1455 unsigned long stripe_count;
1456 unsigned long stripe_size;
1457 unsigned long width;
1458 unsigned long woffset;
1462 if (lsm->lsm_stripe_count <= 1)
1466 stripe_size = lsm->lsm_stripe_size;
1467 stripe_count = lsm->lsm_stripe_count;
1469 /* width = # bytes in all stripes */
1470 width = stripe_size * stripe_count;
1472 /* woffset = offset within a width; offset = whole number of widths */
1473 woffset = do_div(offset, width);
1475 stripe_index = woffset / stripe_size;
1477 *idp = ostid_id(&lsm->lsm_oinfo[stripe_index]->loi_oi);
1478 *offp = offset * stripe_size + woffset % stripe_size;
1482 echo_client_page_debug_setup(struct lov_stripe_md *lsm,
1483 struct page *page, int rw, u64 id,
1484 u64 offset, u64 count)
1491 /* no partial pages on the client */
1492 LASSERT(count == PAGE_CACHE_SIZE);
1496 for (delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
1497 if (rw == OBD_BRW_WRITE) {
1498 stripe_off = offset + delta;
1500 echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id);
1502 stripe_off = 0xdeadbeef00c0ffeeULL;
1503 stripe_id = 0xdeadbeef00c0ffeeULL;
1505 block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE,
1506 stripe_off, stripe_id);
1512 static int echo_client_page_debug_check(struct lov_stripe_md *lsm,
1513 struct page *page, u64 id,
1514 u64 offset, u64 count)
1523 /* no partial pages on the client */
1524 LASSERT(count == PAGE_CACHE_SIZE);
1528 for (rc = delta = 0; delta < PAGE_CACHE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
1529 stripe_off = offset + delta;
1531 echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id);
1533 rc2 = block_debug_check("test_brw",
1534 addr + delta, OBD_ECHO_BLOCK_SIZE,
1535 stripe_off, stripe_id);
1537 CERROR("Error in echo object %#llx\n", id);
1546 static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
1547 struct echo_object *eco, u64 offset,
1548 u64 count, int async,
1549 struct obd_trans_info *oti)
1551 struct lov_stripe_md *lsm = eco->eo_lsm;
1553 struct brw_page *pga;
1554 struct brw_page *pgp;
1555 struct page **pages;
1563 verify = (ostid_id(&oa->o_oi) != ECHO_PERSISTENT_OBJID &&
1564 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
1565 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
1567 gfp_mask = ((ostid_id(&oa->o_oi) & 2) == 0) ? GFP_KERNEL : GFP_HIGHUSER;
1569 LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ);
1570 LASSERT(lsm != NULL);
1571 LASSERT(ostid_id(&lsm->lsm_oi) == ostid_id(&oa->o_oi));
1574 (count & (~CFS_PAGE_MASK)) != 0)
1577 /* XXX think again with misaligned I/O */
1578 npages = count >> PAGE_CACHE_SHIFT;
1580 if (rw == OBD_BRW_WRITE)
1581 brw_flags = OBD_BRW_ASYNC;
1583 pga = kcalloc(npages, sizeof(*pga), GFP_NOFS);
1587 pages = kcalloc(npages, sizeof(*pages), GFP_NOFS);
1588 if (pages == NULL) {
1593 for (i = 0, pgp = pga, off = offset;
1595 i++, pgp++, off += PAGE_CACHE_SIZE) {
1597 LASSERT(pgp->pg == NULL); /* for cleanup */
1600 pgp->pg = alloc_page(gfp_mask);
1601 if (pgp->pg == NULL)
1605 pgp->count = PAGE_CACHE_SIZE;
1607 pgp->flag = brw_flags;
1610 echo_client_page_debug_setup(lsm, pgp->pg, rw,
1611 ostid_id(&oa->o_oi), off,
1615 /* brw mode can only be used at client */
1616 LASSERT(ed->ed_next != NULL);
1617 rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);
1620 if (rc != 0 || rw != OBD_BRW_READ)
1623 for (i = 0, pgp = pga; i < npages; i++, pgp++) {
1624 if (pgp->pg == NULL)
1630 vrc = echo_client_page_debug_check(lsm, pgp->pg,
1631 ostid_id(&oa->o_oi),
1632 pgp->off, pgp->count);
1633 if (vrc != 0 && rc == 0)
1636 __free_page(pgp->pg);
1643 static int echo_client_prep_commit(const struct lu_env *env,
1644 struct obd_export *exp, int rw,
1645 struct obdo *oa, struct echo_object *eco,
1646 u64 offset, u64 count,
1647 u64 batch, struct obd_trans_info *oti,
1650 struct lov_stripe_md *lsm = eco->eo_lsm;
1651 struct obd_ioobj ioo;
1652 struct niobuf_local *lnb;
1653 struct niobuf_remote *rnb;
1655 u64 npages, tot_pages;
1656 int i, ret = 0, brw_flags = 0;
1658 if (count <= 0 || (count & (~CFS_PAGE_MASK)) != 0 ||
1659 (lsm != NULL && ostid_id(&lsm->lsm_oi) != ostid_id(&oa->o_oi)))
1662 npages = batch >> PAGE_CACHE_SHIFT;
1663 tot_pages = count >> PAGE_CACHE_SHIFT;
1665 lnb = kcalloc(npages, sizeof(struct niobuf_local), GFP_NOFS);
1666 rnb = kcalloc(npages, sizeof(struct niobuf_remote), GFP_NOFS);
1668 if (lnb == NULL || rnb == NULL) {
1673 if (rw == OBD_BRW_WRITE && async)
1674 brw_flags |= OBD_BRW_ASYNC;
1676 obdo_to_ioobj(oa, &ioo);
1680 for (; tot_pages; tot_pages -= npages) {
1683 if (tot_pages < npages)
1686 for (i = 0; i < npages; i++, off += PAGE_CACHE_SIZE) {
1687 rnb[i].offset = off;
1688 rnb[i].len = PAGE_CACHE_SIZE;
1689 rnb[i].flags = brw_flags;
1692 ioo.ioo_bufcnt = npages;
1693 oti->oti_transno = 0;
1696 ret = obd_preprw(env, rw, exp, oa, 1, &ioo, rnb, &lpages,
1700 LASSERT(lpages == npages);
1702 for (i = 0; i < lpages; i++) {
1703 struct page *page = lnb[i].page;
1705 /* read past eof? */
1706 if (page == NULL && lnb[i].rc == 0)
1710 lnb[i].flags |= OBD_BRW_ASYNC;
1712 if (ostid_id(&oa->o_oi) == ECHO_PERSISTENT_OBJID ||
1713 (oa->o_valid & OBD_MD_FLFLAGS) == 0 ||
1714 (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0)
1717 if (rw == OBD_BRW_WRITE)
1718 echo_client_page_debug_setup(lsm, page, rw,
1719 ostid_id(&oa->o_oi),
1723 echo_client_page_debug_check(lsm, page,
1724 ostid_id(&oa->o_oi),
1729 ret = obd_commitrw(env, rw, exp, oa, 1, &ioo,
1730 rnb, npages, lnb, oti, ret);
1734 /* Reset oti otherwise it would confuse ldiskfs. */
1735 memset(oti, 0, sizeof(*oti));
1737 /* Reuse env context. */
1738 lu_context_exit((struct lu_context *)&env->le_ctx);
1739 lu_context_enter((struct lu_context *)&env->le_ctx);
1748 static int echo_client_brw_ioctl(const struct lu_env *env, int rw,
1749 struct obd_export *exp,
1750 struct obd_ioctl_data *data,
1751 struct obd_trans_info *dummy_oti)
1753 struct obd_device *obd = class_exp2obd(exp);
1754 struct echo_device *ed = obd2echo_dev(obd);
1755 struct echo_client_obd *ec = ed->ed_ec;
1756 struct obdo *oa = &data->ioc_obdo1;
1757 struct echo_object *eco;
1762 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1764 rc = echo_get_object(&eco, ed, oa);
1768 oa->o_valid &= ~OBD_MD_FLHANDLE;
1770 /* OFD/obdfilter works only via prep/commit */
1771 test_mode = (long)data->ioc_pbuf1;
1775 if (ed->ed_next == NULL && test_mode != 3) {
1777 data->ioc_plen1 = data->ioc_count;
1780 /* Truncate batch size to maximum */
1781 if (data->ioc_plen1 > PTLRPC_MAX_BRW_SIZE)
1782 data->ioc_plen1 = PTLRPC_MAX_BRW_SIZE;
1784 switch (test_mode) {
1788 rc = echo_client_kbrw(ed, rw, oa,
1789 eco, data->ioc_offset,
1790 data->ioc_count, async, dummy_oti);
1793 rc = echo_client_prep_commit(env, ec->ec_exp, rw, oa,
1794 eco, data->ioc_offset,
1795 data->ioc_count, data->ioc_plen1,
1801 echo_put_object(eco);
1806 echo_client_enqueue(struct obd_export *exp, struct obdo *oa,
1807 int mode, u64 offset, u64 nob)
1809 struct echo_device *ed = obd2echo_dev(exp->exp_obd);
1810 struct lustre_handle *ulh = &oa->o_handle;
1811 struct echo_object *eco;
1815 if (ed->ed_next == NULL)
1818 if (!(mode == LCK_PR || mode == LCK_PW))
1821 if ((offset & (~CFS_PAGE_MASK)) != 0 ||
1822 (nob & (~CFS_PAGE_MASK)) != 0)
1825 rc = echo_get_object(&eco, ed, oa);
1829 end = (nob == 0) ? ((u64) -1) : (offset + nob - 1);
1830 rc = cl_echo_enqueue(eco, offset, end, mode, &ulh->cookie);
1832 oa->o_valid |= OBD_MD_FLHANDLE;
1833 CDEBUG(D_INFO, "Cookie is %#llx\n", ulh->cookie);
1835 echo_put_object(eco);
1840 echo_client_cancel(struct obd_export *exp, struct obdo *oa)
1842 struct echo_device *ed = obd2echo_dev(exp->exp_obd);
1843 __u64 cookie = oa->o_handle.cookie;
1845 if ((oa->o_valid & OBD_MD_FLHANDLE) == 0)
1848 CDEBUG(D_INFO, "Cookie is %#llx\n", cookie);
1849 return cl_echo_cancel(ed, cookie);
1853 echo_client_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1854 void *karg, void *uarg)
1856 struct obd_device *obd = exp->exp_obd;
1857 struct echo_device *ed = obd2echo_dev(obd);
1858 struct echo_client_obd *ec = ed->ed_ec;
1859 struct echo_object *eco;
1860 struct obd_ioctl_data *data = karg;
1861 struct obd_trans_info dummy_oti;
1863 struct oti_req_ack_lock *ack_lock;
1866 int rw = OBD_BRW_READ;
1870 memset(&dummy_oti, 0, sizeof(dummy_oti));
1872 oa = &data->ioc_obdo1;
1873 if (!(oa->o_valid & OBD_MD_FLGROUP)) {
1874 oa->o_valid |= OBD_MD_FLGROUP;
1875 ostid_set_seq_echo(&oa->o_oi);
1878 /* This FID is unpacked just for validation at this point */
1879 rc = ostid_to_fid(&fid, &oa->o_oi, 0);
1883 env = kzalloc(sizeof(*env), GFP_NOFS);
1887 rc = lu_env_init(env, LCT_DT_THREAD);
1894 case OBD_IOC_CREATE: /* may create echo object */
1895 if (!capable(CFS_CAP_SYS_ADMIN)) {
1900 rc = echo_create_object(env, ed, 1, oa, data->ioc_pbuf1,
1901 data->ioc_plen1, &dummy_oti);
1904 case OBD_IOC_DESTROY:
1905 if (!capable(CFS_CAP_SYS_ADMIN)) {
1910 rc = echo_get_object(&eco, ed, oa);
1912 rc = obd_destroy(env, ec->ec_exp, oa, eco->eo_lsm,
1915 eco->eo_deleted = 1;
1916 echo_put_object(eco);
1920 case OBD_IOC_GETATTR:
1921 rc = echo_get_object(&eco, ed, oa);
1923 struct obd_info oinfo = { };
1925 oinfo.oi_md = eco->eo_lsm;
1927 rc = obd_getattr(env, ec->ec_exp, &oinfo);
1928 echo_put_object(eco);
1932 case OBD_IOC_SETATTR:
1933 if (!capable(CFS_CAP_SYS_ADMIN)) {
1938 rc = echo_get_object(&eco, ed, oa);
1940 struct obd_info oinfo = { };
1943 oinfo.oi_md = eco->eo_lsm;
1945 rc = obd_setattr(env, ec->ec_exp, &oinfo, NULL);
1946 echo_put_object(eco);
1950 case OBD_IOC_BRW_WRITE:
1951 if (!capable(CFS_CAP_SYS_ADMIN)) {
1958 case OBD_IOC_BRW_READ:
1959 rc = echo_client_brw_ioctl(env, rw, exp, data, &dummy_oti);
1962 case ECHO_IOC_GET_STRIPE:
1963 rc = echo_get_object(&eco, ed, oa);
1965 rc = echo_copyout_lsm(eco->eo_lsm, data->ioc_pbuf1,
1967 echo_put_object(eco);
1971 case ECHO_IOC_SET_STRIPE:
1972 if (!capable(CFS_CAP_SYS_ADMIN)) {
1977 if (data->ioc_pbuf1 == NULL) { /* unset */
1978 rc = echo_get_object(&eco, ed, oa);
1980 eco->eo_deleted = 1;
1981 echo_put_object(eco);
1984 rc = echo_create_object(env, ed, 0, oa,
1986 data->ioc_plen1, &dummy_oti);
1990 case ECHO_IOC_ENQUEUE:
1991 if (!capable(CFS_CAP_SYS_ADMIN)) {
1996 rc = echo_client_enqueue(exp, oa,
1997 data->ioc_conn1, /* lock mode */
1999 data->ioc_count);/*extent*/
2002 case ECHO_IOC_CANCEL:
2003 rc = echo_client_cancel(exp, oa);
2007 CERROR("echo_ioctl(): unrecognised ioctl %#x\n", cmd);
2016 /* XXX this should be in a helper also called by target_send_reply */
2017 for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4;
2019 if (!ack_lock->mode)
2021 ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
2027 static int echo_client_setup(const struct lu_env *env,
2028 struct obd_device *obddev, struct lustre_cfg *lcfg)
2030 struct echo_client_obd *ec = &obddev->u.echo_client;
2031 struct obd_device *tgt;
2032 struct obd_uuid echo_uuid = { "ECHO_UUID" };
2033 struct obd_connect_data *ocd = NULL;
2036 if (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
2037 CERROR("requires a TARGET OBD name\n");
2041 tgt = class_name2obd(lustre_cfg_string(lcfg, 1));
2042 if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) {
2043 CERROR("device not attached or not set up (%s)\n",
2044 lustre_cfg_string(lcfg, 1));
2048 spin_lock_init(&ec->ec_lock);
2049 INIT_LIST_HEAD(&ec->ec_objects);
2050 INIT_LIST_HEAD(&ec->ec_locks);
2052 ec->ec_nstripes = 0;
2054 ocd = kzalloc(sizeof(*ocd), GFP_NOFS);
2056 CERROR("Can't alloc ocd connecting to %s\n",
2057 lustre_cfg_string(lcfg, 1));
2061 ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_REQPORTAL |
2062 OBD_CONNECT_BRW_SIZE |
2063 OBD_CONNECT_GRANT | OBD_CONNECT_FULL20 |
2064 OBD_CONNECT_64BITHASH | OBD_CONNECT_LVB_TYPE |
2066 ocd->ocd_brw_size = DT_MAX_BRW_SIZE;
2067 ocd->ocd_version = LUSTRE_VERSION_CODE;
2068 ocd->ocd_group = FID_SEQ_ECHO;
2070 rc = obd_connect(env, &ec->ec_exp, tgt, &echo_uuid, ocd, NULL);
2075 CERROR("fail to connect to device %s\n",
2076 lustre_cfg_string(lcfg, 1));
2083 static int echo_client_cleanup(struct obd_device *obddev)
2085 struct echo_client_obd *ec = &obddev->u.echo_client;
2088 if (!list_empty(&obddev->obd_exports)) {
2089 CERROR("still has clients!\n");
2093 LASSERT(atomic_read(&ec->ec_exp->exp_refcount) > 0);
2094 rc = obd_disconnect(ec->ec_exp);
2096 CERROR("fail to disconnect device: %d\n", rc);
2101 static int echo_client_connect(const struct lu_env *env,
2102 struct obd_export **exp,
2103 struct obd_device *src, struct obd_uuid *cluuid,
2104 struct obd_connect_data *data, void *localdata)
2107 struct lustre_handle conn = { 0 };
2109 rc = class_connect(&conn, src, cluuid);
2111 *exp = class_conn2export(&conn);
2117 static int echo_client_disconnect(struct obd_export *exp)
2126 rc = class_disconnect(exp);
2132 static struct obd_ops echo_client_obd_ops = {
2133 .o_owner = THIS_MODULE,
2134 .o_iocontrol = echo_client_iocontrol,
2135 .o_connect = echo_client_connect,
2136 .o_disconnect = echo_client_disconnect
2139 static int echo_client_init(void)
2143 rc = lu_kmem_init(echo_caches);
2145 rc = class_register_type(&echo_client_obd_ops, NULL,
2146 LUSTRE_ECHO_CLIENT_NAME,
2149 lu_kmem_fini(echo_caches);
2154 static void echo_client_exit(void)
2156 class_unregister_type(LUSTRE_ECHO_CLIENT_NAME);
2157 lu_kmem_fini(echo_caches);
2160 static int __init obdecho_init(void)
2162 LCONSOLE_INFO("Echo OBD driver; http://www.lustre.org/\n");
2164 LASSERT(PAGE_CACHE_SIZE % OBD_ECHO_BLOCK_SIZE == 0);
2166 return echo_client_init();
2169 static void /*__exit*/ obdecho_exit(void)
2175 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2176 MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
2177 MODULE_LICENSE("GPL");
2178 MODULE_VERSION(LUSTRE_VERSION_STRING);
2180 module_init(obdecho_init);
2181 module_exit(obdecho_exit);
2183 /** @} echo_client */