1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
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
39 #include <libcfs/libcfs.h>
41 #include <liblustre.h>
45 #include <obd_support.h>
46 #include <obd_class.h>
47 #include <lustre_debug.h>
48 #include <lprocfs_status.h>
49 #include <cl_object.h>
51 #include "echo_internal.h"
54 struct cl_device ed_cl;
55 struct echo_client_obd *ed_ec;
57 struct cl_site ed_site_myself;
58 struct cl_site *ed_site;
59 struct lu_device *ed_next;
64 struct cl_object eo_cl;
65 struct cl_object_header eo_hdr;
67 struct echo_device *eo_dev;
68 struct list_head eo_obj_chain;
69 struct lov_stripe_md *eo_lsm;
74 struct echo_object_conf {
75 struct cl_object_conf eoc_cl;
76 struct lov_stripe_md **eoc_md;
80 struct cl_page_slice ep_cl;
81 struct cl_sync_io *ep_sync_io;
82 cfs_page_t *ep_vmpage;
86 struct cl_lock_slice el_cl;
87 struct list_head el_chain;
88 struct echo_object *el_object;
93 struct cl_io_slice ei_cl;
98 struct cl_req_slice er_cl;
102 static int echo_client_setup(struct obd_device *obddev,
103 struct lustre_cfg *lcfg);
104 static int echo_client_cleanup(struct obd_device *obddev);
107 /** \defgroup echo_helpers
110 static inline struct echo_device *cl2echo_dev(const struct cl_device *dev)
112 return container_of0(dev, struct echo_device, ed_cl);
115 static inline struct cl_device *echo_dev2cl(struct echo_device *d)
120 static inline struct echo_device *obd2echo_dev(const struct obd_device *obd)
122 return cl2echo_dev(lu2cl_dev(obd->obd_lu_dev));
125 static inline struct cl_object *echo_obj2cl(struct echo_object *eco)
130 static inline struct echo_object *cl2echo_obj(const struct cl_object *o)
132 return container_of(o, struct echo_object, eo_cl);
135 static inline struct echo_page *cl2echo_page(const struct cl_page_slice *s)
137 return container_of(s, struct echo_page, ep_cl);
140 static inline struct echo_lock *cl2echo_lock(const struct cl_lock_slice *s)
142 return container_of(s, struct echo_lock, el_cl);
145 static inline struct cl_lock *echo_lock2cl(const struct echo_lock *ecl)
147 return ecl->el_cl.cls_lock;
150 static struct lu_context_key echo_thread_key;
151 static inline struct echo_thread_info *echo_env_info(const struct lu_env *env)
153 struct echo_thread_info *info;
154 info = lu_context_key_get(&env->le_ctx, &echo_thread_key);
155 LASSERT(info != NULL);
160 struct echo_object_conf *cl2echo_conf(const struct cl_object_conf *c)
162 return container_of(c, struct echo_object_conf, eoc_cl);
165 static inline void lsm2fid(struct lov_stripe_md *lsm, struct lu_fid *fid)
168 fid->f_seq = lsm->lsm_object_gr << 16 | lsm->lsm_object_id >> 32;
169 fid->f_oid = lsm->lsm_object_id;
171 /** @} echo_helpers */
173 static struct echo_object *cl_echo_object_find(struct echo_device *d,
174 struct lov_stripe_md **lsm);
175 static int cl_echo_object_put(struct echo_object *eco);
176 static int cl_echo_enqueue (struct echo_object *eco, obd_off start,
177 obd_off end, int mode, __u64 *cookie);
178 static int cl_echo_cancel (struct echo_device *d, __u64 cookie);
179 static int cl_echo_object_brw(struct echo_object *eco, int rw, obd_off offset,
180 cfs_page_t **pages, int npages, int async);
182 static struct echo_thread_info *echo_env_info(const struct lu_env *env);
184 struct echo_thread_info {
185 struct echo_object_conf eti_conf;
186 struct lustre_md eti_md;
188 struct cl_2queue eti_queue;
190 struct cl_sync_io eti_anchor;
191 struct cl_lock_descr eti_descr;
192 struct lu_fid eti_fid;
195 /* No session used right now */
196 struct echo_session_info {
200 static cfs_mem_cache_t *echo_page_kmem;
201 static cfs_mem_cache_t *echo_lock_kmem;
202 static cfs_mem_cache_t *echo_object_kmem;
203 static cfs_mem_cache_t *echo_thread_kmem;
204 static cfs_mem_cache_t *echo_session_kmem;
205 //static cfs_mem_cache_t *echo_req_kmem;
207 static struct lu_kmem_descr echo_caches[] = {
209 .ckd_cache = &echo_page_kmem,
210 .ckd_name = "echo_page_kmem",
211 .ckd_size = sizeof (struct echo_page)
214 .ckd_cache = &echo_lock_kmem,
215 .ckd_name = "echo_lock_kmem",
216 .ckd_size = sizeof (struct echo_lock)
219 .ckd_cache = &echo_object_kmem,
220 .ckd_name = "echo_object_kmem",
221 .ckd_size = sizeof (struct echo_object)
224 .ckd_cache = &echo_thread_kmem,
225 .ckd_name = "echo_thread_kmem",
226 .ckd_size = sizeof (struct echo_thread_info)
229 .ckd_cache = &echo_session_kmem,
230 .ckd_name = "echo_session_kmem",
231 .ckd_size = sizeof (struct echo_session_info)
235 .ckd_cache = &echo_req_kmem,
236 .ckd_name = "echo_req_kmem",
237 .ckd_size = sizeof (struct echo_req)
245 /** defgroup echo_page echo_page
247 * Echo page operations.
251 cfs_page_t *echo_page_vmpage(const struct lu_env *env,
252 const struct cl_page_slice *slice)
254 return cl2echo_page(slice)->ep_vmpage;
257 static void echo_page_discard(const struct lu_env *env,
258 const struct cl_page_slice *slice,
261 cl_page_delete(env, slice->cpl_page);
264 static int echo_page_is_vmlocked(const struct lu_env *env,
265 const struct cl_page_slice *slice)
270 static void echo_page_completion(const struct lu_env *env,
271 const struct cl_page_slice *slice,
274 struct echo_page *ecp = cl2echo_page(slice);
275 struct cl_sync_io *anchor = ecp->ep_sync_io;
278 LASSERT(anchor != NULL);
279 ecp->ep_sync_io = NULL;
280 cl_sync_io_note(anchor, ioret);
284 static void echo_page_fini(const struct lu_env *env,
285 struct cl_page_slice *slice)
287 struct echo_page *ep = cl2echo_page(slice);
288 struct echo_object *eco = cl2echo_obj(slice->cpl_obj);
289 cfs_page_t *vmpage = ep->ep_vmpage;
292 atomic_dec(&eco->eo_npages);
293 page_cache_release(vmpage);
294 OBD_SLAB_FREE_PTR(ep, echo_page_kmem);
298 static int echo_page_prep(const struct lu_env *env,
299 const struct cl_page_slice *slice,
305 static int echo_page_print(const struct lu_env *env,
306 const struct cl_page_slice *slice,
307 void *cookie, lu_printer_t printer)
309 struct echo_page *ep = cl2echo_page(slice);
311 (*printer)(env, cookie, LUSTRE_ECHO_CLIENT_NAME"-page@%p vm@%p\n",
316 static const struct cl_page_operations echo_page_ops = {
317 .cpo_discard = echo_page_discard,
318 .cpo_vmpage = echo_page_vmpage,
319 .cpo_fini = echo_page_fini,
320 .cpo_print = echo_page_print,
321 .cpo_is_vmlocked = echo_page_is_vmlocked,
324 .cpo_prep = echo_page_prep,
325 .cpo_completion = echo_page_completion,
328 .cpo_prep = echo_page_prep,
329 .cpo_completion = echo_page_completion,
335 /** \defgroup echo_lock echo_lock
337 * echo lock operations
341 static void echo_lock_fini(const struct lu_env *env,
342 struct cl_lock_slice *slice)
344 struct echo_lock *ecl = cl2echo_lock(slice);
346 LASSERT(list_empty(&ecl->el_chain));
347 OBD_SLAB_FREE_PTR(ecl, echo_lock_kmem);
350 static void echo_lock_delete(const struct lu_env *env,
351 const struct cl_lock_slice *slice)
353 struct echo_lock *ecl = cl2echo_lock(slice);
355 LASSERT(list_empty(&ecl->el_chain));
358 static int echo_lock_fits_into(const struct lu_env *env,
359 const struct cl_lock_slice *slice,
360 const struct cl_lock_descr *need,
361 const struct cl_io *_)
366 static struct cl_lock_operations echo_lock_ops = {
367 .clo_fini = echo_lock_fini,
368 .clo_delete = echo_lock_delete,
369 .clo_fits_into = echo_lock_fits_into
374 /** \defgroup echo_cl_ops echo_cl_ops
376 * operations for cl_object
380 static struct cl_page *echo_page_init(const struct lu_env *env,
381 struct cl_object *obj,
382 struct cl_page *page, cfs_page_t *vmpage)
384 struct echo_page *ep;
387 OBD_SLAB_ALLOC_PTR_GFP(ep, echo_page_kmem, CFS_ALLOC_IO);
389 struct echo_object *eco = cl2echo_obj(obj);
390 ep->ep_vmpage = vmpage;
391 page_cache_get(vmpage);
392 cl_page_slice_add(page, &ep->ep_cl, obj, &echo_page_ops);
393 atomic_inc(&eco->eo_npages);
395 RETURN(ERR_PTR(ep ? 0 : -ENOMEM));
398 static int echo_io_init(const struct lu_env *env, struct cl_object *obj,
404 static int echo_lock_init(const struct lu_env *env,
405 struct cl_object *obj, struct cl_lock *lock,
406 const struct cl_io *_)
408 struct echo_lock *el;
411 OBD_SLAB_ALLOC_PTR_GFP(el, echo_lock_kmem, CFS_ALLOC_IO);
413 cl_lock_slice_add(lock, &el->el_cl, obj, &echo_lock_ops);
414 el->el_object = cl2echo_obj(obj);
415 CFS_INIT_LIST_HEAD(&el->el_chain);
417 RETURN(el == NULL ? -ENOMEM : 0);
420 static int echo_conf_set(const struct lu_env *env, struct cl_object *obj,
421 const struct cl_object_conf *conf)
426 static const struct cl_object_operations echo_cl_obj_ops = {
427 .coo_page_init = echo_page_init,
428 .coo_lock_init = echo_lock_init,
429 .coo_io_init = echo_io_init,
430 .coo_conf_set = echo_conf_set
432 /** @} echo_cl_ops */
434 /** \defgroup echo_lu_ops echo_lu_ops
436 * operations for echo lu object.
440 static int echo_object_init(const struct lu_env *env, struct lu_object *obj,
441 const struct lu_object_conf *conf)
443 const struct cl_object_conf *cconf = lu2cl_conf(conf);
444 struct echo_object_conf *econf = cl2echo_conf(cconf);
445 struct echo_device *ed = cl2echo_dev(lu2cl_dev(obj->lo_dev));
446 struct echo_client_obd *ec = ed->ed_ec;
447 struct echo_object *eco = cl2echo_obj(lu2cl(obj));
451 struct lu_object *below;
452 struct lu_device *under;
455 below = under->ld_ops->ldo_object_alloc(env, obj->lo_header,
459 lu_object_add(obj, below);
462 LASSERT(econf->eoc_md);
463 eco->eo_lsm = *econf->eoc_md;
465 atomic_set(&eco->eo_npages, 0);
467 /* clear the lsm pointer so that it won't get freed. */
468 *econf->eoc_md = NULL;
470 spin_lock(&ec->ec_lock);
471 list_add_tail(&eco->eo_obj_chain, &ec->ec_objects);
472 spin_unlock(&ec->ec_lock);
477 static void echo_object_free(const struct lu_env *env, struct lu_object *obj)
479 struct echo_object *eco = cl2echo_obj(lu2cl(obj));
480 struct echo_client_obd *ec = eco->eo_dev->ed_ec;
481 struct lov_stripe_md *lsm = eco->eo_lsm;
484 LASSERT(atomic_read(&eco->eo_npages) == 0);
486 spin_lock(&ec->ec_lock);
487 list_del_init(&eco->eo_obj_chain);
488 spin_unlock(&ec->ec_lock);
491 lu_object_header_fini(obj->lo_header);
494 obd_free_memmd(ec->ec_exp, &lsm);
495 OBD_SLAB_FREE_PTR(eco, echo_object_kmem);
499 static int echo_object_print(const struct lu_env *env, void *cookie,
500 lu_printer_t p, const struct lu_object *o)
502 struct echo_object *obj = cl2echo_obj(lu2cl(o));
504 return (*p)(env, cookie, "echoclient-object@%p", obj);
508 static const struct lu_object_operations echo_lu_obj_ops = {
509 .loo_object_init = echo_object_init,
510 .loo_object_delete = NULL,
511 .loo_object_release = NULL,
512 .loo_object_free = echo_object_free,
513 .loo_object_print = echo_object_print,
514 .loo_object_invariant = NULL
516 /** @} echo_lu_ops */
518 /** \defgroup echo_lu_dev_ops
520 * Operations for echo lu device.
524 static struct lu_object *echo_object_alloc(const struct lu_env *env,
525 const struct lu_object_header *hdr,
526 struct lu_device *dev)
528 struct echo_object *eco;
529 struct lu_object *obj = NULL;
532 /* we're the top dev. */
533 LASSERT(hdr == NULL);
534 OBD_SLAB_ALLOC_PTR_GFP(eco, echo_object_kmem, CFS_ALLOC_IO);
536 struct cl_object_header *hdr = &eco->eo_hdr;
538 obj = &echo_obj2cl(eco)->co_lu;
539 cl_object_header_init(hdr);
540 lu_object_init(obj, &hdr->coh_lu, dev);
541 lu_object_add_top(&hdr->coh_lu, obj);
543 eco->eo_cl.co_ops = &echo_cl_obj_ops;
544 obj->lo_ops = &echo_lu_obj_ops;
549 static struct lu_device_operations echo_device_lu_ops = {
550 .ldo_object_alloc = echo_object_alloc,
552 /** @} echo_lu_dev_ops */
554 static struct cl_device_operations echo_device_cl_ops = {
557 /** \defgroup echo_init echo_init
559 * Init and fini functions for echo client.
563 static int echo_site_init(const struct lu_env *env, struct echo_device *ed)
565 struct cl_site *site = &ed->ed_site_myself;
568 /* initialize site */
569 rc = cl_site_init(site, &ed->ed_cl);
571 CERROR("Cannot initilize site for echo client(%d)\n", rc);
575 rc = lu_site_init_finish(&site->cs_lu);
583 static void echo_site_fini(const struct lu_env *env, struct echo_device *ed)
586 cl_site_fini(ed->ed_site);
591 static void *echo_thread_key_init(const struct lu_context *ctx,
592 struct lu_context_key *key)
594 struct echo_thread_info *info;
596 OBD_SLAB_ALLOC_PTR_GFP(info, echo_thread_kmem, CFS_ALLOC_IO);
598 info = ERR_PTR(-ENOMEM);
602 static void echo_thread_key_fini(const struct lu_context *ctx,
603 struct lu_context_key *key, void *data)
605 struct echo_thread_info *info = data;
606 OBD_SLAB_FREE_PTR(info, echo_thread_kmem);
609 static void echo_thread_key_exit(const struct lu_context *ctx,
610 struct lu_context_key *key, void *data)
614 static struct lu_context_key echo_thread_key = {
615 .lct_tags = LCT_CL_THREAD,
616 .lct_init = echo_thread_key_init,
617 .lct_fini = echo_thread_key_fini,
618 .lct_exit = echo_thread_key_exit
621 static void *echo_session_key_init(const struct lu_context *ctx,
622 struct lu_context_key *key)
624 struct echo_session_info *session;
626 OBD_SLAB_ALLOC_PTR_GFP(session, echo_session_kmem, CFS_ALLOC_IO);
628 session = ERR_PTR(-ENOMEM);
632 static void echo_session_key_fini(const struct lu_context *ctx,
633 struct lu_context_key *key, void *data)
635 struct echo_session_info *session = data;
636 OBD_SLAB_FREE_PTR(session, echo_session_kmem);
639 static void echo_session_key_exit(const struct lu_context *ctx,
640 struct lu_context_key *key, void *data)
644 static struct lu_context_key echo_session_key = {
645 .lct_tags = LCT_SESSION,
646 .lct_init = echo_session_key_init,
647 .lct_fini = echo_session_key_fini,
648 .lct_exit = echo_session_key_exit
651 LU_TYPE_INIT_FINI(echo, &echo_thread_key, &echo_session_key);
653 static struct lu_device *echo_device_alloc(const struct lu_env *env,
654 struct lu_device_type *t,
655 struct lustre_cfg *cfg)
657 struct lu_device *next;
658 struct echo_device *ed;
659 struct cl_device *cd;
660 struct obd_device *obd = NULL; /* to keep compiler happy */
661 struct obd_device *tgt;
662 const char *tgt_type_name;
669 GOTO(out, rc = -ENOMEM);
673 rc = cl_device_init(cd, t);
677 cd->cd_lu_dev.ld_ops = &echo_device_lu_ops;
678 cd->cd_ops = &echo_device_cl_ops;
681 rc = echo_site_init(env, ed);
686 obd = class_name2obd(lustre_cfg_string(cfg, 0));
687 LASSERT(obd != NULL);
688 rc = echo_client_setup(obd, cfg);
691 ed->ed_ec = &obd->u.echo_client;
694 tgt = class_name2obd(lustre_cfg_string(cfg, 1));
695 LASSERT(tgt != NULL);
696 next = tgt->obd_lu_dev;
697 if (!lu_device_is_cl(next))
701 * if echo client is to be stacked upon ost device, the next is NULL
702 * since ost is not a clio device so far
704 tgt_type_name = tgt->obd_type->typ_name;
706 LASSERT(next != NULL);
707 if (next->ld_site != NULL)
708 GOTO(out, rc = -EBUSY);
710 next->ld_site = &ed->ed_site->cs_lu;
711 rc = next->ld_type->ldt_ops->ldto_device_init(env, next,
712 next->ld_type->ldt_name, NULL);
716 /* Trikcy case, I have to determine the obd type since clio
717 * uses the different parameters to initialize objects for
720 if (strcmp(tgt_type_name, LUSTRE_LOV_NAME) == 0)
721 ed->ed_next_islov = 1;
723 LASSERT(strcmp(tgt_type_name, LUSTRE_OSC_NAME) == 0);
725 LASSERT(strcmp(tgt_type_name, LUSTRE_OST_NAME) == 0);
728 RETURN(&cd->cd_lu_dev);
734 rc2 = echo_client_cleanup(obd);
736 CERROR("Cleanup obd device %s error(%d)\n",
741 echo_site_fini(env, ed);
743 cl_device_fini(&ed->ed_cl);
753 static int echo_device_init(const struct lu_env *env, struct lu_device *d,
754 const char *name, struct lu_device *next)
760 static struct lu_device *echo_device_fini(const struct lu_env *env,
763 struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
764 struct lu_device *next = ed->ed_next;
767 next = next->ld_type->ldt_ops->ldto_device_fini(env, next);
771 static struct lu_device *echo_device_free(const struct lu_env *env,
774 struct echo_device *ed = cl2echo_dev(lu2cl_dev(d));
775 struct echo_client_obd *ec = ed->ed_ec;
776 struct lu_device *next = ed->ed_next;
778 printk("ed = %p, ec = %p, next = %p\n", ed, ec, next);
781 spin_lock(&ec->ec_lock);
782 while (!list_empty(&ec->ec_locks)) {
783 struct echo_lock *ecl = list_entry(ec->ec_locks.next,
784 struct echo_lock, el_chain);
785 struct cl_lock *lock = echo_lock2cl(ecl);
787 list_del_init(&ecl->el_chain);
788 spin_unlock(&ec->ec_lock);
790 CERROR("echo client: pending lock %p\n", ecl);
794 cl_lock_release(env, lock, "ec enqueue", ecl->el_object);
796 cl_lock_mutex_get(env, lock);
797 cl_lock_cancel(env, lock);
798 cl_lock_delete(env, lock);
799 cl_lock_mutex_put(env, lock);
800 cl_lock_put(env, lock);
802 spin_lock(&ec->ec_lock);
804 spin_unlock(&ec->ec_lock);
806 LASSERT(ed->ed_site);
807 lu_site_purge(env, &ed->ed_site->cs_lu, -1);
809 /* check if there are objects still alive, assume only one reference */
810 spin_lock(&ec->ec_lock);
811 while (!list_empty(&ec->ec_objects)) {
812 struct echo_object *eco;
813 eco = list_entry(ec->ec_objects.next, struct echo_object,
815 spin_unlock(&ec->ec_lock);
818 cl_echo_object_put(eco);
820 spin_lock(&ec->ec_lock);
822 spin_unlock(&ec->ec_lock);
824 echo_client_cleanup(d->ld_obd);
827 next = next->ld_type->ldt_ops->ldto_device_free(env, next);
829 LASSERT(ed->ed_site == lu2cl_site(d->ld_site));
830 echo_site_fini(env, ed);
831 cl_device_fini(&ed->ed_cl);
837 static const struct lu_device_type_operations echo_device_type_ops = {
838 .ldto_init = echo_type_init,
839 .ldto_fini = echo_type_fini,
841 .ldto_start = echo_type_start,
842 .ldto_stop = echo_type_stop,
844 .ldto_device_alloc = echo_device_alloc,
845 .ldto_device_free = echo_device_free,
846 .ldto_device_init = echo_device_init,
847 .ldto_device_fini = echo_device_fini
850 static struct lu_device_type echo_device_type = {
851 .ldt_tags = LU_DEVICE_CL,
852 .ldt_name = LUSTRE_ECHO_CLIENT_NAME,
853 .ldt_ops = &echo_device_type_ops,
854 .ldt_ctx_tags = LCT_CL_THREAD
858 /** \defgroup echo_exports
860 * exporting functions to echo client
865 /* Interfaces to echo client obd device */
866 static struct echo_object *cl_echo_object_find(struct echo_device *d,
867 struct lov_stripe_md **lsmp)
870 struct echo_thread_info *info;
871 struct echo_object_conf *conf;
872 struct lov_stripe_md *lsm;
873 struct echo_object *eco;
874 struct cl_object *obj;
882 LASSERT(lsm->lsm_object_id);
884 env = cl_env_get(&refcheck);
888 info = echo_env_info(env);
889 conf = &info->eti_conf;
891 if (!d->ed_next_islov) {
892 struct lov_oinfo *oinfo = lsm->lsm_oinfo[0];
893 LASSERT(oinfo != NULL);
894 oinfo->loi_id = lsm->lsm_object_id;
895 oinfo->loi_gr = lsm->lsm_object_gr;
896 conf->eoc_cl.u.coc_oinfo = oinfo;
898 struct lustre_md *md;
900 memset(md, 0, sizeof *md);
902 conf->eoc_cl.u.coc_md = md;
907 fid = &info->eti_fid;
910 obj = cl_object_find(env, echo_dev2cl(d), fid, &conf->eoc_cl);
912 GOTO(out, eco = (void*)obj);
914 eco = cl2echo_obj(obj);
915 if (eco->eo_deleted) {
916 cl_object_put(env, obj);
917 eco = ERR_PTR(-EAGAIN);
921 cl_env_put(env, &refcheck);
925 static int cl_echo_object_put(struct echo_object *eco)
928 struct cl_object *obj = echo_obj2cl(eco);
932 env = cl_env_get(&refcheck);
934 RETURN(PTR_ERR(env));
936 /* an external function to kill an object? */
937 if (eco->eo_deleted) {
938 struct lu_object_header *loh = obj->co_lu.lo_header;
939 LASSERT(&eco->eo_hdr == luh2coh(loh));
940 set_bit(LU_OBJECT_HEARD_BANSHEE, &loh->loh_flags);
941 cl_object_prune(env, obj);
944 cl_object_put(env, obj);
945 cl_env_put(env, &refcheck);
949 static int cl_echo_enqueue(struct echo_object *eco, obd_off start, obd_off end,
950 int mode, __u64 *cookie)
954 struct echo_thread_info *info;
956 struct cl_lock_descr *descr;
957 struct cl_object *obj = echo_obj2cl(eco);
962 env = cl_env_get(&refcheck);
964 RETURN(PTR_ERR(env));
966 info = echo_env_info(env);
967 descr = &info->eti_descr;
968 descr->cld_obj = obj;
969 descr->cld_start = cl_index(obj, start);
970 descr->cld_end = cl_index(obj, end);
971 descr->cld_mode = mode == LCK_PW ? CLM_WRITE : CLM_READ;
975 result = cl_io_init(env, io, CIT_MISC, obj);
978 LASSERT(result == 0);
981 lck = cl_lock_request(env, io, descr, CEF_ASYNC, "ec enqueue", eco);
983 struct echo_client_obd *ec = eco->eo_dev->ed_ec;
984 struct echo_lock *el;
986 result = cl_wait(env, lck);
988 el = cl2echo_lock(cl_lock_at(lck, &echo_device_type));
989 spin_lock(&ec->ec_lock);
990 list_add(&el->el_chain, &ec->ec_locks);
991 *cookie = el->el_cookie = ++ec->ec_unique;
992 spin_unlock(&ec->ec_lock);
994 cl_lock_release(env, lck, "ec enqueue", cfs_current());
1000 cl_env_put(env, &refcheck);
1004 static int cl_echo_cancel(struct echo_device *ed, __u64 cookie)
1006 struct echo_client_obd *ec = ed->ed_ec;
1007 struct echo_lock *ecl = NULL;
1008 struct list_head *el;
1016 env = cl_env_get(&refcheck);
1018 RETURN(PTR_ERR(env));
1020 spin_lock (&ec->ec_lock);
1021 list_for_each (el, &ec->ec_locks) {
1022 ecl = list_entry (el, struct echo_lock, el_chain);
1023 CDEBUG(D_INFO, "ecl: %p, cookie: %llx\n", ecl, ecl->el_cookie);
1024 found = (ecl->el_cookie == cookie);
1026 list_del_init(&ecl->el_chain);
1030 spin_unlock (&ec->ec_lock);
1034 struct cl_lock *clk = echo_lock2cl(ecl);
1038 cl_lock_release(env, clk, "ec enqueue", ecl->el_object);
1040 cl_lock_mutex_get(env, clk);
1041 cl_lock_cancel(env, clk);
1042 cl_lock_delete(env, clk);
1043 cl_lock_mutex_put(env, clk);
1044 cl_lock_put(env, clk);
1047 cl_env_put(env, &refcheck);
1051 static int cl_echo_async_brw(const struct lu_env *env, struct cl_io *io,
1052 enum cl_req_type _, struct cl_2queue *queue)
1054 struct cl_page *clp;
1055 struct cl_page *temp;
1059 cl_page_list_splice(&queue->c2_qin, &queue->c2_qout);
1060 cl_page_list_for_each_safe(clp, temp, &queue->c2_qout) {
1062 rc = cl_page_cache_add(env, io, clp, CRT_WRITE);
1065 cl_page_list_move(&queue->c2_qin, &queue->c2_qout, clp);
1066 result = result ?: rc;
1068 RETURN(list_empty(&queue->c2_qout.pl_pages) ? result : 0);
1071 static int cl_echo_object_brw(struct echo_object *eco, int rw, obd_off offset,
1072 cfs_page_t **pages, int npages, int async)
1075 struct echo_thread_info *info;
1076 struct cl_object *obj = echo_obj2cl(eco);
1077 struct echo_device *ed = eco->eo_dev;
1078 struct cl_sync_io *anchor;
1079 struct cl_2queue *queue;
1081 struct cl_page *clp;
1082 struct echo_page *ep;
1084 int page_size = cl_page_size(obj);
1090 LASSERT(ed->ed_next != NULL);
1091 env = cl_env_get(&refcheck);
1093 RETURN(PTR_ERR(env));
1095 info = echo_env_info(env);
1097 anchor = &info->eti_anchor;
1098 queue = &info->eti_queue;
1100 cl_sync_io_init(anchor, npages);
1101 cl_2queue_init(queue);
1102 rc = cl_io_init(env, io, CIT_MISC, obj);
1107 for (i = 0; i < npages; i++) {
1109 clp = cl_page_find(env, obj, cl_index(obj, offset),
1110 pages[i], CPT_TRANSIENT);
1115 LASSERT(clp->cp_type == CPT_TRANSIENT);
1117 rc = cl_page_own(env, io, clp);
1119 LASSERT(clp->cp_state == CPS_FREEING);
1120 cl_page_put(env, clp);
1124 ep = cl2echo_page(cl_page_at(clp, &echo_device_type));
1125 ep->ep_sync_io = anchor;
1126 cl_2queue_add(queue, clp);
1128 /* drop the reference count for cl_page_find, so that the page
1129 * will be freed in cl_2queue_fini. */
1130 cl_page_put(env, clp);
1131 offset += page_size;
1135 enum cl_req_type typ = rw == READ ? CRT_READ : CRT_WRITE;
1137 async = async && (typ == CRT_WRITE);
1139 rc = cl_echo_async_brw(env, io, typ, queue);
1141 rc = cl_io_submit_rw(env, io,typ, queue, CRP_NORMAL);
1142 CDEBUG(D_INFO, "echo_client %s write returns %d\n",
1143 async ? "async" : "sync", rc);
1146 * If some pages weren't sent for any reason (e.g.,
1147 * direct-io read found up-to-date pages in the
1148 * cache), count them as completed to avoid infinite
1151 cl_page_list_for_each(clp, &queue->c2_qin)
1152 cl_sync_io_note(anchor, +1);
1153 /* wait for the IO to be finished. */
1154 rc = cl_sync_io_wait(env, io, &queue->c2_qout, anchor);
1158 cl_2queue_discard(env, io, queue);
1159 cl_2queue_disown(env, io, queue);
1160 cl_2queue_fini(env, queue);
1161 cl_io_fini(env, io);
1165 cl_env_put(env, &refcheck);
1168 /** @} echo_exports */
1171 static obd_id last_object_id;
1174 echo_copyout_lsm (struct lov_stripe_md *lsm, void *_ulsm, int ulsm_nob)
1176 struct lov_stripe_md *ulsm = _ulsm;
1179 nob = offsetof (struct lov_stripe_md, lsm_oinfo[lsm->lsm_stripe_count]);
1183 if (copy_to_user (ulsm, lsm, sizeof(ulsm)))
1186 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1187 if (copy_to_user (ulsm->lsm_oinfo[i], lsm->lsm_oinfo[i],
1188 sizeof(lsm->lsm_oinfo[0])))
1195 echo_copyin_lsm (struct echo_device *ed, struct lov_stripe_md *lsm,
1196 void *ulsm, int ulsm_nob)
1198 struct echo_client_obd *ec = ed->ed_ec;
1201 if (ulsm_nob < sizeof (*lsm))
1204 if (copy_from_user (lsm, ulsm, sizeof (*lsm)))
1207 if (lsm->lsm_stripe_count > ec->ec_nstripes ||
1208 lsm->lsm_magic != LOV_MAGIC ||
1209 (lsm->lsm_stripe_size & (~CFS_PAGE_MASK)) != 0 ||
1210 ((__u64)lsm->lsm_stripe_size * lsm->lsm_stripe_count > ~0UL))
1214 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1215 if (copy_from_user(lsm->lsm_oinfo[i],
1216 ((struct lov_stripe_md *)ulsm)->lsm_oinfo[i],
1217 sizeof(lsm->lsm_oinfo[0])))
1223 static int echo_create_object(struct echo_device *ed, int on_target,
1224 struct obdo *oa, void *ulsm, int ulsm_nob,
1225 struct obd_trans_info *oti)
1227 struct echo_object *eco;
1228 struct echo_client_obd *ec = ed->ed_ec;
1229 struct lov_stripe_md *lsm = NULL;
1234 if ((oa->o_valid & OBD_MD_FLID) == 0 && /* no obj id */
1235 (on_target || /* set_stripe */
1236 ec->ec_nstripes != 0)) { /* LOV */
1237 CERROR ("No valid oid\n");
1241 rc = obd_alloc_memmd(ec->ec_exp, &lsm);
1243 CERROR("Cannot allocate md, rc = %d\n", rc);
1250 rc = echo_copyin_lsm (ed, lsm, ulsm, ulsm_nob);
1254 if (lsm->lsm_stripe_count == 0)
1255 lsm->lsm_stripe_count = ec->ec_nstripes;
1257 if (lsm->lsm_stripe_size == 0)
1258 lsm->lsm_stripe_size = CFS_PAGE_SIZE;
1262 /* setup stripes: indices + default ids if required */
1263 for (i = 0; i < lsm->lsm_stripe_count; i++) {
1264 if (lsm->lsm_oinfo[i]->loi_id == 0)
1265 lsm->lsm_oinfo[i]->loi_id = lsm->lsm_object_id;
1267 lsm->lsm_oinfo[i]->loi_ost_idx =
1268 (idx + i) % ec->ec_nstripes;
1272 /* setup object ID here for !on_target and LOV hint */
1273 if (oa->o_valid & OBD_MD_FLID)
1274 lsm->lsm_object_id = oa->o_id;
1276 if (lsm->lsm_object_id == 0)
1277 lsm->lsm_object_id = ++last_object_id;
1281 oa->o_gr = FILTER_GROUP_ECHO;
1282 oa->o_valid |= OBD_MD_FLGROUP;
1284 rc = obd_create(ec->ec_exp, oa, &lsm, oti);
1286 CERROR("Cannot create objects, rc = %d\n", rc);
1292 /* See what object ID we were given */
1293 oa->o_id = lsm->lsm_object_id;
1294 oa->o_valid |= OBD_MD_FLID;
1296 eco = cl_echo_object_find(ed, &lsm);
1298 GOTO(failed, rc = PTR_ERR(eco));
1299 cl_echo_object_put(eco);
1301 CDEBUG(D_INFO, "oa->o_id = %lx\n", (long)oa->o_id);
1306 obd_destroy(ec->ec_exp, oa, lsm, oti, NULL, NULL);
1308 obd_free_memmd(ec->ec_exp, &lsm);
1310 CERROR("create object failed with rc = %d\n", rc);
1314 static int echo_get_object(struct echo_object **ecop, struct echo_device *ed,
1317 struct echo_client_obd *ec = ed->ed_ec;
1318 struct lov_stripe_md *lsm = NULL;
1319 struct echo_object *eco;
1323 if ((oa->o_valid & OBD_MD_FLID) == 0 ||
1324 oa->o_id == 0) /* disallow use of object id 0 */
1326 CERROR ("No valid oid\n");
1330 rc = obd_alloc_memmd(ec->ec_exp, &lsm);
1334 lsm->lsm_object_id = oa->o_id;
1335 if (oa->o_valid & OBD_MD_FLGROUP)
1336 lsm->lsm_object_gr = oa->o_gr;
1338 lsm->lsm_object_gr = FILTER_GROUP_ECHO;
1341 eco = cl_echo_object_find(ed, &lsm);
1347 obd_free_memmd(ec->ec_exp, &lsm);
1351 static void echo_put_object(struct echo_object *eco)
1353 if (cl_echo_object_put(eco))
1354 CERROR("echo client: drop an object failed");
1358 echo_get_stripe_off_id (struct lov_stripe_md *lsm, obd_off *offp, obd_id *idp)
1360 unsigned long stripe_count;
1361 unsigned long stripe_size;
1362 unsigned long width;
1363 unsigned long woffset;
1367 if (lsm->lsm_stripe_count <= 1)
1371 stripe_size = lsm->lsm_stripe_size;
1372 stripe_count = lsm->lsm_stripe_count;
1374 /* width = # bytes in all stripes */
1375 width = stripe_size * stripe_count;
1377 /* woffset = offset within a width; offset = whole number of widths */
1378 woffset = do_div (offset, width);
1380 stripe_index = woffset / stripe_size;
1382 *idp = lsm->lsm_oinfo[stripe_index]->loi_id;
1383 *offp = offset * stripe_size + woffset % stripe_size;
1387 echo_client_page_debug_setup(struct lov_stripe_md *lsm,
1388 cfs_page_t *page, int rw, obd_id id,
1389 obd_off offset, obd_off count)
1396 /* no partial pages on the client */
1397 LASSERT(count == CFS_PAGE_SIZE);
1399 addr = cfs_kmap(page);
1401 for (delta = 0; delta < CFS_PAGE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
1402 if (rw == OBD_BRW_WRITE) {
1403 stripe_off = offset + delta;
1405 echo_get_stripe_off_id(lsm, &stripe_off, &stripe_id);
1407 stripe_off = 0xdeadbeef00c0ffeeULL;
1408 stripe_id = 0xdeadbeef00c0ffeeULL;
1410 block_debug_setup(addr + delta, OBD_ECHO_BLOCK_SIZE,
1411 stripe_off, stripe_id);
1417 static int echo_client_page_debug_check(struct lov_stripe_md *lsm,
1418 cfs_page_t *page, obd_id id,
1419 obd_off offset, obd_off count)
1428 /* no partial pages on the client */
1429 LASSERT(count == CFS_PAGE_SIZE);
1431 addr = cfs_kmap(page);
1433 for (rc = delta = 0; delta < CFS_PAGE_SIZE; delta += OBD_ECHO_BLOCK_SIZE) {
1434 stripe_off = offset + delta;
1436 echo_get_stripe_off_id (lsm, &stripe_off, &stripe_id);
1438 rc2 = block_debug_check("test_brw",
1439 addr + delta, OBD_ECHO_BLOCK_SIZE,
1440 stripe_off, stripe_id);
1442 CERROR ("Error in echo object "LPX64"\n", id);
1451 static int echo_client_kbrw(struct echo_device *ed, int rw, struct obdo *oa,
1452 struct echo_object *eco, obd_off offset,
1453 obd_size count, int async,
1454 struct obd_trans_info *oti)
1456 struct echo_client_obd *ec = ed->ed_ec;
1457 struct lov_stripe_md *lsm = eco->eo_lsm;
1459 struct brw_page *pga;
1460 struct brw_page *pgp;
1469 verify = ((oa->o_id) != ECHO_PERSISTENT_OBJID &&
1470 (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
1471 (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
1473 gfp_mask = ((oa->o_id & 2) == 0) ? CFS_ALLOC_STD : CFS_ALLOC_HIGHUSER;
1475 LASSERT(rw == OBD_BRW_WRITE || rw == OBD_BRW_READ);
1476 LASSERT(lsm != NULL);
1477 LASSERT(lsm->lsm_object_id == oa->o_id);
1480 (count & (~CFS_PAGE_MASK)) != 0)
1483 /* XXX think again with misaligned I/O */
1484 npages = count >> CFS_PAGE_SHIFT;
1486 OBD_ALLOC(pga, npages * sizeof(*pga));
1490 OBD_ALLOC(pages, npages * sizeof(*pages));
1491 if (pages == NULL) {
1492 OBD_FREE(pga, npages * sizeof(*pga));
1496 for (i = 0, pgp = pga, off = offset;
1498 i++, pgp++, off += CFS_PAGE_SIZE) {
1500 LASSERT (pgp->pg == NULL); /* for cleanup */
1503 OBD_PAGE_ALLOC(pgp->pg, gfp_mask);
1504 if (pgp->pg == NULL)
1508 pgp->count = CFS_PAGE_SIZE;
1513 echo_client_page_debug_setup(lsm, pgp->pg, rw,
1514 oa->o_id, off, pgp->count);
1517 if (ed->ed_next == NULL) {
1518 struct obd_info oinfo = { { { 0 } } };
1521 rc = obd_brw(rw, ec->ec_exp, &oinfo, npages, pga, oti);
1523 rc = cl_echo_object_brw(eco, rw, offset, pages, npages, async);
1526 if (rc != 0 || rw != OBD_BRW_READ)
1529 for (i = 0, pgp = pga; i < npages; i++, pgp++) {
1530 if (pgp->pg == NULL)
1535 vrc = echo_client_page_debug_check(lsm, pgp->pg, oa->o_id,
1536 pgp->off, pgp->count);
1537 if (vrc != 0 && rc == 0)
1540 OBD_PAGE_FREE(pgp->pg);
1542 OBD_FREE(pga, npages * sizeof(*pga));
1543 OBD_FREE(pages, npages * sizeof(*pages));
1547 static int echo_client_prep_commit(struct obd_export *exp, int rw,
1548 struct obdo *oa, struct echo_object *eco,
1549 obd_off offset, obd_size count,
1550 obd_size batch, struct obd_trans_info *oti)
1552 struct lov_stripe_md *lsm = eco->eo_lsm;
1553 struct obd_ioobj ioo;
1554 struct niobuf_local *lnb;
1555 struct niobuf_remote *rnb;
1557 obd_size npages, tot_pages;
1561 if (count <= 0 || (count & (~CFS_PAGE_MASK)) != 0 ||
1562 (lsm != NULL && lsm->lsm_object_id != oa->o_id))
1565 npages = batch >> CFS_PAGE_SHIFT;
1566 tot_pages = count >> CFS_PAGE_SHIFT;
1568 OBD_ALLOC(lnb, npages * sizeof(struct niobuf_local));
1569 OBD_ALLOC(rnb, npages * sizeof(struct niobuf_remote));
1571 if (lnb == NULL || rnb == NULL)
1572 GOTO(out, ret = -ENOMEM);
1574 obdo_to_ioobj(oa, &ioo);
1578 for(; tot_pages; tot_pages -= npages) {
1581 if (tot_pages < npages)
1584 for (i = 0; i < npages; i++, off += CFS_PAGE_SIZE) {
1585 rnb[i].offset = off;
1586 rnb[i].len = CFS_PAGE_SIZE;
1589 ioo.ioo_bufcnt = npages;
1590 oti->oti_transno = 0;
1593 ret = obd_preprw(rw, exp, oa, 1, &ioo, rnb, &lpages, lnb, oti,
1597 LASSERT(lpages == npages);
1599 for (i = 0; i < lpages; i++) {
1600 cfs_page_t *page = lnb[i].page;
1602 /* read past eof? */
1603 if (page == NULL && lnb[i].rc == 0)
1606 if (oa->o_id == ECHO_PERSISTENT_OBJID ||
1607 (oa->o_valid & OBD_MD_FLFLAGS) == 0 ||
1608 (oa->o_flags & OBD_FL_DEBUG_CHECK) == 0)
1611 if (rw == OBD_BRW_WRITE)
1612 echo_client_page_debug_setup(lsm, page, rw,
1617 echo_client_page_debug_check(lsm, page,
1623 ret = obd_commitrw(rw, exp, oa, 1,&ioo,rnb,npages,lnb,oti,ret);
1630 OBD_FREE(lnb, npages * sizeof(struct niobuf_local));
1632 OBD_FREE(rnb, npages * sizeof(struct niobuf_remote));
1636 static int echo_client_brw_ioctl(int rw, struct obd_export *exp,
1637 struct obd_ioctl_data *data)
1639 struct obd_device *obd = class_exp2obd(exp);
1640 struct echo_device *ed = obd2echo_dev(obd);
1641 struct echo_client_obd *ec = ed->ed_ec;
1642 struct obd_trans_info dummy_oti = { .oti_thread = NULL };
1643 struct echo_object *eco;
1648 rc = echo_get_object(&eco, ed, &data->ioc_obdo1);
1652 data->ioc_obdo1.o_valid &= ~OBD_MD_FLHANDLE;
1653 data->ioc_obdo1.o_valid |= OBD_MD_FLGROUP;
1654 data->ioc_obdo1.o_gr = FILTER_GROUP_ECHO;
1656 switch((long)data->ioc_pbuf1) {
1661 rc = echo_client_kbrw(ed, rw, &data->ioc_obdo1,
1662 eco, data->ioc_offset,
1663 data->ioc_count, async, &dummy_oti);
1666 rc = echo_client_prep_commit(ec->ec_exp, rw, &data->ioc_obdo1,
1667 eco, data->ioc_offset,
1668 data->ioc_count, data->ioc_plen1,
1674 echo_put_object(eco);
1679 echo_client_enqueue(struct obd_export *exp, struct obdo *oa,
1680 int mode, obd_off offset, obd_size nob)
1682 struct echo_device *ed = obd2echo_dev(exp->exp_obd);
1683 struct lustre_handle *ulh = &oa->o_handle;
1684 struct echo_object *eco;
1689 if (ed->ed_next == NULL)
1690 RETURN(-EOPNOTSUPP);
1692 if (!(mode == LCK_PR || mode == LCK_PW))
1695 if ((offset & (~CFS_PAGE_MASK)) != 0 ||
1696 (nob & (~CFS_PAGE_MASK)) != 0)
1699 rc = echo_get_object (&eco, ed, oa);
1703 end = (nob == 0) ? ((obd_off) -1) : (offset + nob - 1);
1704 rc = cl_echo_enqueue(eco, offset, end, mode, &ulh->cookie);
1706 oa->o_valid |= OBD_MD_FLHANDLE;
1707 CDEBUG(D_INFO, "Cookie is %llx\n", ulh->cookie);
1709 echo_put_object(eco);
1714 echo_client_cancel(struct obd_export *exp, struct obdo *oa)
1716 struct echo_device *ed = obd2echo_dev(exp->exp_obd);
1717 __u64 cookie = oa->o_handle.cookie;
1719 if ((oa->o_valid & OBD_MD_FLHANDLE) == 0)
1722 CDEBUG(D_INFO, "Cookie is %llx\n", cookie);
1723 return cl_echo_cancel(ed, cookie);
1727 echo_client_iocontrol(unsigned int cmd, struct obd_export *exp,
1728 int len, void *karg, void *uarg)
1730 struct obd_device *obd = exp->exp_obd;
1731 struct echo_device *ed = obd2echo_dev(obd);
1732 struct echo_client_obd *ec = ed->ed_ec;
1733 struct echo_object *eco;
1734 struct obd_ioctl_data *data = karg;
1735 struct obd_trans_info dummy_oti;
1736 struct oti_req_ack_lock *ack_lock;
1738 int rw = OBD_BRW_READ;
1745 memset(&dummy_oti, 0, sizeof(dummy_oti));
1748 case OBD_IOC_CREATE: /* may create echo object */
1749 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1750 GOTO (out, rc = -EPERM);
1752 rc = echo_create_object (ed, 1, &data->ioc_obdo1,
1753 data->ioc_pbuf1, data->ioc_plen1,
1757 case OBD_IOC_DESTROY:
1758 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1759 GOTO (out, rc = -EPERM);
1761 rc = echo_get_object (&eco, ed, &data->ioc_obdo1);
1763 oa = &data->ioc_obdo1;
1764 oa->o_gr = FILTER_GROUP_ECHO;
1765 oa->o_valid |= OBD_MD_FLGROUP;
1766 rc = obd_destroy(ec->ec_exp, oa, eco->eo_lsm,
1767 &dummy_oti, NULL, NULL);
1769 eco->eo_deleted = 1;
1770 echo_put_object(eco);
1774 case OBD_IOC_GETATTR:
1775 rc = echo_get_object (&eco, ed, &data->ioc_obdo1);
1777 struct obd_info oinfo = { { { 0 } } };
1778 oinfo.oi_md = eco->eo_lsm;
1779 oinfo.oi_oa = &data->ioc_obdo1;
1780 rc = obd_getattr(ec->ec_exp, &oinfo);
1781 echo_put_object(eco);
1785 case OBD_IOC_SETATTR:
1786 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1787 GOTO (out, rc = -EPERM);
1789 rc = echo_get_object (&eco, ed, &data->ioc_obdo1);
1791 struct obd_info oinfo = { { { 0 } } };
1792 oinfo.oi_oa = &data->ioc_obdo1;
1793 oinfo.oi_md = eco->eo_lsm;
1795 rc = obd_setattr(ec->ec_exp, &oinfo, NULL);
1796 echo_put_object(eco);
1800 case OBD_IOC_BRW_WRITE:
1801 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1802 GOTO (out, rc = -EPERM);
1806 case OBD_IOC_BRW_READ:
1807 rc = echo_client_brw_ioctl(rw, exp, data);
1810 case ECHO_IOC_GET_STRIPE:
1811 rc = echo_get_object(&eco, ed, &data->ioc_obdo1);
1813 rc = echo_copyout_lsm(eco->eo_lsm, data->ioc_pbuf1,
1815 echo_put_object(eco);
1819 case ECHO_IOC_SET_STRIPE:
1820 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1821 GOTO (out, rc = -EPERM);
1823 if (data->ioc_pbuf1 == NULL) { /* unset */
1824 rc = echo_get_object(&eco, ed, &data->ioc_obdo1);
1826 eco->eo_deleted = 1;
1827 echo_put_object(eco);
1830 rc = echo_create_object(ed, 0, &data->ioc_obdo1,
1832 data->ioc_plen1, &dummy_oti);
1836 case ECHO_IOC_ENQUEUE:
1837 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
1838 GOTO (out, rc = -EPERM);
1840 rc = echo_client_enqueue(exp, &data->ioc_obdo1,
1841 data->ioc_conn1, /* lock mode */
1843 data->ioc_count);/*extent*/
1846 case ECHO_IOC_CANCEL:
1847 rc = echo_client_cancel(exp, &data->ioc_obdo1);
1851 CERROR ("echo_ioctl(): unrecognised ioctl %#x\n", cmd);
1852 GOTO (out, rc = -ENOTTY);
1858 /* XXX this should be in a helper also called by target_send_reply */
1859 for (ack_lock = dummy_oti.oti_ack_locks, i = 0; i < 4;
1861 if (!ack_lock->mode)
1863 ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
1871 static int echo_client_setup(struct obd_device *obddev, struct lustre_cfg *lcfg)
1873 struct echo_client_obd *ec = &obddev->u.echo_client;
1874 struct obd_device *tgt;
1875 struct obd_uuid echo_uuid = { "ECHO_UUID" };
1876 struct obd_connect_data *ocd = NULL;
1880 if (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1881 CERROR("requires a TARGET OBD name\n");
1885 tgt = class_name2obd(lustre_cfg_string(lcfg, 1));
1886 if (!tgt || !tgt->obd_attached || !tgt->obd_set_up) {
1887 CERROR("device not attached or not set up (%s)\n",
1888 lustre_cfg_string(lcfg, 1));
1892 spin_lock_init (&ec->ec_lock);
1893 CFS_INIT_LIST_HEAD (&ec->ec_objects);
1894 CFS_INIT_LIST_HEAD (&ec->ec_locks);
1896 ec->ec_nstripes = 0;
1898 OBD_ALLOC(ocd, sizeof(*ocd));
1900 CERROR("Can't alloc ocd connecting to %s\n",
1901 lustre_cfg_string(lcfg, 1));
1905 ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_REQPORTAL |
1907 ocd->ocd_version = LUSTRE_VERSION_CODE;
1908 ocd->ocd_group = FILTER_GROUP_ECHO;
1910 rc = obd_connect(NULL, &ec->ec_exp, tgt, &echo_uuid, ocd, NULL);
1912 OBD_FREE(ocd, sizeof(*ocd));
1915 CERROR("fail to connect to device %s\n",
1916 lustre_cfg_string(lcfg, 1));
1923 static int echo_client_cleanup(struct obd_device *obddev)
1925 struct echo_client_obd *ec = &obddev->u.echo_client;
1929 if (!list_empty(&obddev->obd_exports)) {
1930 CERROR("still has clients!\n");
1934 rc = obd_disconnect(ec->ec_exp);
1936 CERROR("fail to disconnect device: %d\n", rc);
1941 static int echo_client_connect(const struct lu_env *env,
1942 struct obd_export **exp,
1943 struct obd_device *src, struct obd_uuid *cluuid,
1944 struct obd_connect_data *data, void *localdata)
1947 struct lustre_handle conn = { 0 };
1950 rc = class_connect(&conn, src, cluuid);
1952 *exp = class_conn2export(&conn);
1958 static int echo_client_disconnect(struct obd_export *exp)
1961 struct obd_device *obd;
1962 struct echo_client_obd *ec;
1963 struct ec_lock *ecl;
1969 GOTO(out, rc = -EINVAL);
1973 ec = &obd->u.echo_client;
1975 /* no more contention on export's lock list */
1976 while (!list_empty (&exp->exp_ec_data.eced_locks)) {
1977 ecl = list_entry (exp->exp_ec_data.eced_locks.next,
1978 struct ec_lock, ecl_exp_chain);
1979 list_del (&ecl->ecl_exp_chain);
1981 rc = obd_cancel(ec->ec_exp, ecl->ecl_object->eco_lsm,
1982 ecl->ecl_mode, &ecl->ecl_lock_handle);
1984 CDEBUG (D_INFO, "Cancel lock on object "LPX64" on disconnect "
1985 "(%d)\n", ecl->ecl_object->eco_id, rc);
1987 echo_put_object (ecl->ecl_object);
1988 OBD_FREE (ecl, sizeof (*ecl));
1992 rc = class_disconnect(exp);
1998 static struct obd_ops echo_obd_ops = {
1999 .o_owner = THIS_MODULE,
2002 .o_setup = echo_client_setup,
2003 .o_cleanup = echo_client_cleanup,
2006 .o_iocontrol = echo_client_iocontrol,
2007 .o_connect = echo_client_connect,
2008 .o_disconnect = echo_client_disconnect
2011 int echo_client_init(void)
2013 struct lprocfs_static_vars lvars = { 0 };
2016 lprocfs_echo_init_vars(&lvars);
2017 rc = class_register_type(&echo_obd_ops, NULL, lvars.module_vars,
2018 LUSTRE_ECHO_CLIENT_NAME, &echo_device_type);
2020 lu_kmem_init(echo_caches);
2024 void echo_client_exit(void)
2026 class_unregister_type(LUSTRE_ECHO_CLIENT_NAME);
2027 lu_kmem_fini(echo_caches);