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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_OSC
35 #include <libcfs/libcfs.h>
37 #include <lustre/lustre_user.h>
39 #include <lprocfs_status.h>
40 #include <lustre_debug.h>
41 #include <lustre_dlm.h>
42 #include <lustre_fid.h>
43 #include <lustre_ha.h>
44 #include <uapi/linux/lustre_ioctl.h>
45 #include <lustre_net.h>
46 #include <lustre_obdo.h>
47 #include <lustre_param.h>
49 #include <obd_cksum.h>
50 #include <obd_class.h>
52 #include "osc_cl_internal.h"
53 #include "osc_internal.h"
55 atomic_t osc_pool_req_count;
56 unsigned int osc_reqpool_maxreqcount;
57 struct ptlrpc_request_pool *osc_rq_pool;
59 /* max memory used for request pool, unit is MB */
60 static unsigned int osc_reqpool_mem_max = 5;
61 module_param(osc_reqpool_mem_max, uint, 0444);
63 struct osc_brw_async_args {
69 struct brw_page **aa_ppga;
70 struct client_obd *aa_cli;
71 struct list_head aa_oaps;
72 struct list_head aa_exts;
75 #define osc_grant_args osc_brw_async_args
77 struct osc_setattr_args {
79 obd_enqueue_update_f sa_upcall;
83 struct osc_fsync_args {
84 struct osc_object *fa_obj;
86 obd_enqueue_update_f fa_upcall;
90 struct osc_ladvise_args {
92 obd_enqueue_update_f la_upcall;
96 struct osc_enqueue_args {
97 struct obd_export *oa_exp;
98 enum ldlm_type oa_type;
99 enum ldlm_mode oa_mode;
101 osc_enqueue_upcall_f oa_upcall;
103 struct ost_lvb *oa_lvb;
104 struct lustre_handle oa_lockh;
105 unsigned int oa_agl:1;
108 static void osc_release_ppga(struct brw_page **ppga, size_t count);
109 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
112 void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
114 struct ost_body *body;
116 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
119 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
122 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
125 struct ptlrpc_request *req;
126 struct ost_body *body;
130 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
134 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
136 ptlrpc_request_free(req);
140 osc_pack_req_body(req, oa);
142 ptlrpc_request_set_replen(req);
144 rc = ptlrpc_queue_wait(req);
148 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
150 GOTO(out, rc = -EPROTO);
152 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
153 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
155 oa->o_blksize = cli_brw_size(exp->exp_obd);
156 oa->o_valid |= OBD_MD_FLBLKSZ;
160 ptlrpc_req_finished(req);
165 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
168 struct ptlrpc_request *req;
169 struct ost_body *body;
173 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
175 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
179 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
181 ptlrpc_request_free(req);
185 osc_pack_req_body(req, oa);
187 ptlrpc_request_set_replen(req);
189 rc = ptlrpc_queue_wait(req);
193 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
195 GOTO(out, rc = -EPROTO);
197 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
201 ptlrpc_req_finished(req);
206 static int osc_setattr_interpret(const struct lu_env *env,
207 struct ptlrpc_request *req,
208 struct osc_setattr_args *sa, int rc)
210 struct ost_body *body;
216 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
218 GOTO(out, rc = -EPROTO);
220 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
223 rc = sa->sa_upcall(sa->sa_cookie, rc);
227 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
228 obd_enqueue_update_f upcall, void *cookie,
229 struct ptlrpc_request_set *rqset)
231 struct ptlrpc_request *req;
232 struct osc_setattr_args *sa;
237 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
241 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
243 ptlrpc_request_free(req);
247 osc_pack_req_body(req, oa);
249 ptlrpc_request_set_replen(req);
251 /* do mds to ost setattr asynchronously */
253 /* Do not wait for response. */
254 ptlrpcd_add_req(req);
256 req->rq_interpret_reply =
257 (ptlrpc_interpterer_t)osc_setattr_interpret;
259 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
260 sa = ptlrpc_req_async_args(req);
262 sa->sa_upcall = upcall;
263 sa->sa_cookie = cookie;
265 if (rqset == PTLRPCD_SET)
266 ptlrpcd_add_req(req);
268 ptlrpc_set_add_req(rqset, req);
274 static int osc_ladvise_interpret(const struct lu_env *env,
275 struct ptlrpc_request *req,
278 struct osc_ladvise_args *la = arg;
279 struct ost_body *body;
285 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
287 GOTO(out, rc = -EPROTO);
289 *la->la_oa = body->oa;
291 rc = la->la_upcall(la->la_cookie, rc);
296 * If rqset is NULL, do not wait for response. Upcall and cookie could also
297 * be NULL in this case
299 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
300 struct ladvise_hdr *ladvise_hdr,
301 obd_enqueue_update_f upcall, void *cookie,
302 struct ptlrpc_request_set *rqset)
304 struct ptlrpc_request *req;
305 struct ost_body *body;
306 struct osc_ladvise_args *la;
308 struct lu_ladvise *req_ladvise;
309 struct lu_ladvise *ladvise = ladvise_hdr->lah_advise;
310 int num_advise = ladvise_hdr->lah_count;
311 struct ladvise_hdr *req_ladvise_hdr;
314 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_LADVISE);
318 req_capsule_set_size(&req->rq_pill, &RMF_OST_LADVISE, RCL_CLIENT,
319 num_advise * sizeof(*ladvise));
320 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_LADVISE);
322 ptlrpc_request_free(req);
325 req->rq_request_portal = OST_IO_PORTAL;
326 ptlrpc_at_set_req_timeout(req);
328 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
330 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
333 req_ladvise_hdr = req_capsule_client_get(&req->rq_pill,
334 &RMF_OST_LADVISE_HDR);
335 memcpy(req_ladvise_hdr, ladvise_hdr, sizeof(*ladvise_hdr));
337 req_ladvise = req_capsule_client_get(&req->rq_pill, &RMF_OST_LADVISE);
338 memcpy(req_ladvise, ladvise, sizeof(*ladvise) * num_advise);
339 ptlrpc_request_set_replen(req);
342 /* Do not wait for response. */
343 ptlrpcd_add_req(req);
347 req->rq_interpret_reply = osc_ladvise_interpret;
348 CLASSERT(sizeof(*la) <= sizeof(req->rq_async_args));
349 la = ptlrpc_req_async_args(req);
351 la->la_upcall = upcall;
352 la->la_cookie = cookie;
354 if (rqset == PTLRPCD_SET)
355 ptlrpcd_add_req(req);
357 ptlrpc_set_add_req(rqset, req);
362 static int osc_create(const struct lu_env *env, struct obd_export *exp,
365 struct ptlrpc_request *req;
366 struct ost_body *body;
371 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
372 LASSERT(fid_seq_is_echo(ostid_seq(&oa->o_oi)));
374 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
376 GOTO(out, rc = -ENOMEM);
378 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
380 ptlrpc_request_free(req);
384 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
387 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
389 ptlrpc_request_set_replen(req);
391 rc = ptlrpc_queue_wait(req);
395 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
397 GOTO(out_req, rc = -EPROTO);
399 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
400 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
402 oa->o_blksize = cli_brw_size(exp->exp_obd);
403 oa->o_valid |= OBD_MD_FLBLKSZ;
405 CDEBUG(D_HA, "transno: %lld\n",
406 lustre_msg_get_transno(req->rq_repmsg));
408 ptlrpc_req_finished(req);
413 int osc_punch_base(struct obd_export *exp, struct obdo *oa,
414 obd_enqueue_update_f upcall, void *cookie,
415 struct ptlrpc_request_set *rqset)
417 struct ptlrpc_request *req;
418 struct osc_setattr_args *sa;
419 struct ost_body *body;
423 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
427 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
429 ptlrpc_request_free(req);
432 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
433 ptlrpc_at_set_req_timeout(req);
435 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
437 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
439 ptlrpc_request_set_replen(req);
441 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
442 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
443 sa = ptlrpc_req_async_args(req);
445 sa->sa_upcall = upcall;
446 sa->sa_cookie = cookie;
447 if (rqset == PTLRPCD_SET)
448 ptlrpcd_add_req(req);
450 ptlrpc_set_add_req(rqset, req);
455 static int osc_sync_interpret(const struct lu_env *env,
456 struct ptlrpc_request *req,
459 struct osc_fsync_args *fa = arg;
460 struct ost_body *body;
461 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
462 unsigned long valid = 0;
463 struct cl_object *obj;
469 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
471 CERROR("can't unpack ost_body\n");
472 GOTO(out, rc = -EPROTO);
475 *fa->fa_oa = body->oa;
476 obj = osc2cl(fa->fa_obj);
478 /* Update osc object's blocks attribute */
479 cl_object_attr_lock(obj);
480 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
481 attr->cat_blocks = body->oa.o_blocks;
486 cl_object_attr_update(env, obj, attr, valid);
487 cl_object_attr_unlock(obj);
490 rc = fa->fa_upcall(fa->fa_cookie, rc);
494 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
495 obd_enqueue_update_f upcall, void *cookie,
496 struct ptlrpc_request_set *rqset)
498 struct obd_export *exp = osc_export(obj);
499 struct ptlrpc_request *req;
500 struct ost_body *body;
501 struct osc_fsync_args *fa;
505 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
509 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
511 ptlrpc_request_free(req);
515 /* overload the size and blocks fields in the oa with start/end */
516 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
518 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
520 ptlrpc_request_set_replen(req);
521 req->rq_interpret_reply = osc_sync_interpret;
523 CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
524 fa = ptlrpc_req_async_args(req);
527 fa->fa_upcall = upcall;
528 fa->fa_cookie = cookie;
530 if (rqset == PTLRPCD_SET)
531 ptlrpcd_add_req(req);
533 ptlrpc_set_add_req(rqset, req);
538 /* Find and cancel locally locks matched by @mode in the resource found by
539 * @objid. Found locks are added into @cancel list. Returns the amount of
540 * locks added to @cancels list. */
541 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
542 struct list_head *cancels,
543 enum ldlm_mode mode, __u64 lock_flags)
545 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
546 struct ldlm_res_id res_id;
547 struct ldlm_resource *res;
551 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
552 * export) but disabled through procfs (flag in NS).
554 * This distinguishes from a case when ELC is not supported originally,
555 * when we still want to cancel locks in advance and just cancel them
556 * locally, without sending any RPC. */
557 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
560 ostid_build_res_name(&oa->o_oi, &res_id);
561 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
565 LDLM_RESOURCE_ADDREF(res);
566 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
567 lock_flags, 0, NULL);
568 LDLM_RESOURCE_DELREF(res);
569 ldlm_resource_putref(res);
573 static int osc_destroy_interpret(const struct lu_env *env,
574 struct ptlrpc_request *req, void *data,
577 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
579 atomic_dec(&cli->cl_destroy_in_flight);
580 wake_up(&cli->cl_destroy_waitq);
584 static int osc_can_send_destroy(struct client_obd *cli)
586 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
587 cli->cl_max_rpcs_in_flight) {
588 /* The destroy request can be sent */
591 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
592 cli->cl_max_rpcs_in_flight) {
594 * The counter has been modified between the two atomic
597 wake_up(&cli->cl_destroy_waitq);
602 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
605 struct client_obd *cli = &exp->exp_obd->u.cli;
606 struct ptlrpc_request *req;
607 struct ost_body *body;
608 struct list_head cancels = LIST_HEAD_INIT(cancels);
613 CDEBUG(D_INFO, "oa NULL\n");
617 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
618 LDLM_FL_DISCARD_DATA);
620 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
622 ldlm_lock_list_put(&cancels, l_bl_ast, count);
626 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
629 ptlrpc_request_free(req);
633 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
634 ptlrpc_at_set_req_timeout(req);
636 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
638 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
640 ptlrpc_request_set_replen(req);
642 req->rq_interpret_reply = osc_destroy_interpret;
643 if (!osc_can_send_destroy(cli)) {
644 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
647 * Wait until the number of on-going destroy RPCs drops
648 * under max_rpc_in_flight
650 rc = l_wait_event_exclusive(cli->cl_destroy_waitq,
651 osc_can_send_destroy(cli), &lwi);
653 ptlrpc_req_finished(req);
658 /* Do not wait for response */
659 ptlrpcd_add_req(req);
663 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
666 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
668 LASSERT(!(oa->o_valid & bits));
671 spin_lock(&cli->cl_loi_list_lock);
672 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data, GRANT_PARAM))
673 oa->o_dirty = cli->cl_dirty_grant;
675 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
676 if (unlikely(cli->cl_dirty_pages - cli->cl_dirty_transit >
677 cli->cl_dirty_max_pages)) {
678 CERROR("dirty %lu - %lu > dirty_max %lu\n",
679 cli->cl_dirty_pages, cli->cl_dirty_transit,
680 cli->cl_dirty_max_pages);
682 } else if (unlikely(atomic_long_read(&obd_dirty_pages) -
683 atomic_long_read(&obd_dirty_transit_pages) >
684 (long)(obd_max_dirty_pages + 1))) {
685 /* The atomic_read() allowing the atomic_inc() are
686 * not covered by a lock thus they may safely race and trip
687 * this CERROR() unless we add in a small fudge factor (+1). */
688 CERROR("%s: dirty %ld - %ld > system dirty_max %ld\n",
689 cli_name(cli), atomic_long_read(&obd_dirty_pages),
690 atomic_long_read(&obd_dirty_transit_pages),
691 obd_max_dirty_pages);
693 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
695 CERROR("dirty %lu - dirty_max %lu too big???\n",
696 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
699 unsigned long nrpages;
701 nrpages = cli->cl_max_pages_per_rpc;
702 nrpages *= cli->cl_max_rpcs_in_flight + 1;
703 nrpages = max(nrpages, cli->cl_dirty_max_pages);
704 oa->o_undirty = nrpages << PAGE_SHIFT;
705 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data,
709 /* take extent tax into account when asking for more
711 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
712 cli->cl_max_extent_pages;
713 oa->o_undirty += nrextents * cli->cl_grant_extent_tax;
716 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
717 oa->o_dropped = cli->cl_lost_grant;
718 cli->cl_lost_grant = 0;
719 spin_unlock(&cli->cl_loi_list_lock);
720 CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
721 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
724 void osc_update_next_shrink(struct client_obd *cli)
726 cli->cl_next_shrink_grant =
727 cfs_time_shift(cli->cl_grant_shrink_interval);
728 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
729 cli->cl_next_shrink_grant);
732 static void __osc_update_grant(struct client_obd *cli, u64 grant)
734 spin_lock(&cli->cl_loi_list_lock);
735 cli->cl_avail_grant += grant;
736 spin_unlock(&cli->cl_loi_list_lock);
739 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
741 if (body->oa.o_valid & OBD_MD_FLGRANT) {
742 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
743 __osc_update_grant(cli, body->oa.o_grant);
747 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
748 u32 keylen, void *key,
749 u32 vallen, void *val,
750 struct ptlrpc_request_set *set);
752 static int osc_shrink_grant_interpret(const struct lu_env *env,
753 struct ptlrpc_request *req,
756 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
757 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
758 struct ost_body *body;
761 __osc_update_grant(cli, oa->o_grant);
765 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
767 osc_update_grant(cli, body);
773 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
775 spin_lock(&cli->cl_loi_list_lock);
776 oa->o_grant = cli->cl_avail_grant / 4;
777 cli->cl_avail_grant -= oa->o_grant;
778 spin_unlock(&cli->cl_loi_list_lock);
779 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
780 oa->o_valid |= OBD_MD_FLFLAGS;
783 oa->o_flags |= OBD_FL_SHRINK_GRANT;
784 osc_update_next_shrink(cli);
787 /* Shrink the current grant, either from some large amount to enough for a
788 * full set of in-flight RPCs, or if we have already shrunk to that limit
789 * then to enough for a single RPC. This avoids keeping more grant than
790 * needed, and avoids shrinking the grant piecemeal. */
791 static int osc_shrink_grant(struct client_obd *cli)
793 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
794 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
796 spin_lock(&cli->cl_loi_list_lock);
797 if (cli->cl_avail_grant <= target_bytes)
798 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
799 spin_unlock(&cli->cl_loi_list_lock);
801 return osc_shrink_grant_to_target(cli, target_bytes);
804 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
807 struct ost_body *body;
810 spin_lock(&cli->cl_loi_list_lock);
811 /* Don't shrink if we are already above or below the desired limit
812 * We don't want to shrink below a single RPC, as that will negatively
813 * impact block allocation and long-term performance. */
814 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
815 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
817 if (target_bytes >= cli->cl_avail_grant) {
818 spin_unlock(&cli->cl_loi_list_lock);
821 spin_unlock(&cli->cl_loi_list_lock);
827 osc_announce_cached(cli, &body->oa, 0);
829 spin_lock(&cli->cl_loi_list_lock);
830 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
831 cli->cl_avail_grant = target_bytes;
832 spin_unlock(&cli->cl_loi_list_lock);
833 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
834 body->oa.o_valid |= OBD_MD_FLFLAGS;
835 body->oa.o_flags = 0;
837 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
838 osc_update_next_shrink(cli);
840 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
841 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
842 sizeof(*body), body, NULL);
844 __osc_update_grant(cli, body->oa.o_grant);
849 static int osc_should_shrink_grant(struct client_obd *client)
851 cfs_time_t time = cfs_time_current();
852 cfs_time_t next_shrink = client->cl_next_shrink_grant;
854 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
855 OBD_CONNECT_GRANT_SHRINK) == 0)
858 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
859 /* Get the current RPC size directly, instead of going via:
860 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
861 * Keep comment here so that it can be found by searching. */
862 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
864 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
865 client->cl_avail_grant > brw_size)
868 osc_update_next_shrink(client);
873 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
875 struct client_obd *client;
877 list_for_each_entry(client, &item->ti_obd_list, cl_grant_shrink_list) {
878 if (osc_should_shrink_grant(client))
879 osc_shrink_grant(client);
884 static int osc_add_shrink_grant(struct client_obd *client)
888 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
890 osc_grant_shrink_grant_cb, NULL,
891 &client->cl_grant_shrink_list);
893 CERROR("add grant client %s error %d\n", cli_name(client), rc);
896 CDEBUG(D_CACHE, "add grant client %s\n", cli_name(client));
897 osc_update_next_shrink(client);
901 static int osc_del_shrink_grant(struct client_obd *client)
903 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
907 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
910 * ocd_grant is the total grant amount we're expect to hold: if we've
911 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
912 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
915 * race is tolerable here: if we're evicted, but imp_state already
916 * left EVICTED state, then cl_dirty_pages must be 0 already.
918 spin_lock(&cli->cl_loi_list_lock);
919 cli->cl_avail_grant = ocd->ocd_grant;
920 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
921 cli->cl_avail_grant -= cli->cl_reserved_grant;
922 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
923 cli->cl_avail_grant -= cli->cl_dirty_grant;
925 cli->cl_avail_grant -=
926 cli->cl_dirty_pages << PAGE_SHIFT;
929 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
933 /* overhead for each extent insertion */
934 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
935 /* determine the appropriate chunk size used by osc_extent. */
936 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
937 ocd->ocd_grant_blkbits);
938 /* max_pages_per_rpc must be chunk aligned */
939 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
940 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
941 ~chunk_mask) & chunk_mask;
942 /* determine maximum extent size, in #pages */
943 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
944 cli->cl_max_extent_pages = size >> PAGE_SHIFT;
945 if (cli->cl_max_extent_pages == 0)
946 cli->cl_max_extent_pages = 1;
948 cli->cl_grant_extent_tax = 0;
949 cli->cl_chunkbits = PAGE_SHIFT;
950 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
952 spin_unlock(&cli->cl_loi_list_lock);
954 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
955 "chunk bits: %d cl_max_extent_pages: %d\n",
957 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
958 cli->cl_max_extent_pages);
960 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
961 list_empty(&cli->cl_grant_shrink_list))
962 osc_add_shrink_grant(cli);
965 /* We assume that the reason this OSC got a short read is because it read
966 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
967 * via the LOV, and it _knows_ it's reading inside the file, it's just that
968 * this stripe never got written at or beyond this stripe offset yet. */
969 static void handle_short_read(int nob_read, size_t page_count,
970 struct brw_page **pga)
975 /* skip bytes read OK */
976 while (nob_read > 0) {
977 LASSERT (page_count > 0);
979 if (pga[i]->count > nob_read) {
980 /* EOF inside this page */
981 ptr = kmap(pga[i]->pg) +
982 (pga[i]->off & ~PAGE_MASK);
983 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
990 nob_read -= pga[i]->count;
995 /* zero remaining pages */
996 while (page_count-- > 0) {
997 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
998 memset(ptr, 0, pga[i]->count);
1004 static int check_write_rcs(struct ptlrpc_request *req,
1005 int requested_nob, int niocount,
1006 size_t page_count, struct brw_page **pga)
1011 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1012 sizeof(*remote_rcs) *
1014 if (remote_rcs == NULL) {
1015 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1019 /* return error if any niobuf was in error */
1020 for (i = 0; i < niocount; i++) {
1021 if ((int)remote_rcs[i] < 0)
1022 return(remote_rcs[i]);
1024 if (remote_rcs[i] != 0) {
1025 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1026 i, remote_rcs[i], req);
1031 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1032 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1033 req->rq_bulk->bd_nob_transferred, requested_nob);
1040 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1042 if (p1->flag != p2->flag) {
1043 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1044 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1045 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1047 /* warn if we try to combine flags that we don't know to be
1048 * safe to combine */
1049 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1050 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1051 "report this at https://jira.hpdd.intel.com/\n",
1052 p1->flag, p2->flag);
1057 return (p1->off + p1->count == p2->off);
1060 static u32 osc_checksum_bulk(int nob, size_t pg_count,
1061 struct brw_page **pga, int opc,
1062 cksum_type_t cksum_type)
1066 struct cfs_crypto_hash_desc *hdesc;
1067 unsigned int bufsize;
1068 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1070 LASSERT(pg_count > 0);
1072 hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1073 if (IS_ERR(hdesc)) {
1074 CERROR("Unable to initialize checksum hash %s\n",
1075 cfs_crypto_hash_name(cfs_alg));
1076 return PTR_ERR(hdesc);
1079 while (nob > 0 && pg_count > 0) {
1080 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1082 /* corrupt the data before we compute the checksum, to
1083 * simulate an OST->client data error */
1084 if (i == 0 && opc == OST_READ &&
1085 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1086 unsigned char *ptr = kmap(pga[i]->pg);
1087 int off = pga[i]->off & ~PAGE_MASK;
1089 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1092 cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
1093 pga[i]->off & ~PAGE_MASK,
1095 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1096 (int)(pga[i]->off & ~PAGE_MASK));
1098 nob -= pga[i]->count;
1103 bufsize = sizeof(cksum);
1104 cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
1106 /* For sending we only compute the wrong checksum instead
1107 * of corrupting the data so it is still correct on a redo */
1108 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1115 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1116 u32 page_count, struct brw_page **pga,
1117 struct ptlrpc_request **reqp, int resend)
1119 struct ptlrpc_request *req;
1120 struct ptlrpc_bulk_desc *desc;
1121 struct ost_body *body;
1122 struct obd_ioobj *ioobj;
1123 struct niobuf_remote *niobuf;
1124 int niocount, i, requested_nob, opc, rc;
1125 struct osc_brw_async_args *aa;
1126 struct req_capsule *pill;
1127 struct brw_page *pg_prev;
1130 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1131 RETURN(-ENOMEM); /* Recoverable */
1132 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1133 RETURN(-EINVAL); /* Fatal */
1135 if ((cmd & OBD_BRW_WRITE) != 0) {
1137 req = ptlrpc_request_alloc_pool(cli->cl_import,
1139 &RQF_OST_BRW_WRITE);
1142 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1147 for (niocount = i = 1; i < page_count; i++) {
1148 if (!can_merge_pages(pga[i - 1], pga[i]))
1152 pill = &req->rq_pill;
1153 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1155 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1156 niocount * sizeof(*niobuf));
1158 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1160 ptlrpc_request_free(req);
1163 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1164 ptlrpc_at_set_req_timeout(req);
1165 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1167 req->rq_no_retry_einprogress = 1;
1169 desc = ptlrpc_prep_bulk_imp(req, page_count,
1170 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1171 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1172 PTLRPC_BULK_PUT_SINK) |
1173 PTLRPC_BULK_BUF_KIOV,
1175 &ptlrpc_bulk_kiov_pin_ops);
1178 GOTO(out, rc = -ENOMEM);
1179 /* NB request now owns desc and will free it when it gets freed */
1181 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1182 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1183 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1184 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1186 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1188 obdo_to_ioobj(oa, ioobj);
1189 ioobj->ioo_bufcnt = niocount;
1190 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1191 * that might be send for this request. The actual number is decided
1192 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1193 * "max - 1" for old client compatibility sending "0", and also so the
1194 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1195 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1196 LASSERT(page_count > 0);
1198 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1199 struct brw_page *pg = pga[i];
1200 int poff = pg->off & ~PAGE_MASK;
1202 LASSERT(pg->count > 0);
1203 /* make sure there is no gap in the middle of page array */
1204 LASSERTF(page_count == 1 ||
1205 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1206 ergo(i > 0 && i < page_count - 1,
1207 poff == 0 && pg->count == PAGE_SIZE) &&
1208 ergo(i == page_count - 1, poff == 0)),
1209 "i: %d/%d pg: %p off: %llu, count: %u\n",
1210 i, page_count, pg, pg->off, pg->count);
1211 LASSERTF(i == 0 || pg->off > pg_prev->off,
1212 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1213 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1215 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1216 pg_prev->pg, page_private(pg_prev->pg),
1217 pg_prev->pg->index, pg_prev->off);
1218 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1219 (pg->flag & OBD_BRW_SRVLOCK));
1221 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff, pg->count);
1222 requested_nob += pg->count;
1224 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1226 niobuf->rnb_len += pg->count;
1228 niobuf->rnb_offset = pg->off;
1229 niobuf->rnb_len = pg->count;
1230 niobuf->rnb_flags = pg->flag;
1235 LASSERTF((void *)(niobuf - niocount) ==
1236 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1237 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1238 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1240 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1242 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1243 body->oa.o_valid |= OBD_MD_FLFLAGS;
1244 body->oa.o_flags = 0;
1246 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1249 if (osc_should_shrink_grant(cli))
1250 osc_shrink_grant_local(cli, &body->oa);
1252 /* size[REQ_REC_OFF] still sizeof (*body) */
1253 if (opc == OST_WRITE) {
1254 if (cli->cl_checksum &&
1255 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1256 /* store cl_cksum_type in a local variable since
1257 * it can be changed via lprocfs */
1258 cksum_type_t cksum_type = cli->cl_cksum_type;
1260 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1261 body->oa.o_flags = 0;
1263 body->oa.o_flags |= cksum_type_pack(cksum_type);
1264 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1265 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1269 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1271 /* save this in 'oa', too, for later checking */
1272 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1273 oa->o_flags |= cksum_type_pack(cksum_type);
1275 /* clear out the checksum flag, in case this is a
1276 * resend but cl_checksum is no longer set. b=11238 */
1277 oa->o_valid &= ~OBD_MD_FLCKSUM;
1279 oa->o_cksum = body->oa.o_cksum;
1280 /* 1 RC per niobuf */
1281 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1282 sizeof(__u32) * niocount);
1284 if (cli->cl_checksum &&
1285 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1286 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1287 body->oa.o_flags = 0;
1288 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1289 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1292 ptlrpc_request_set_replen(req);
1294 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1295 aa = ptlrpc_req_async_args(req);
1297 aa->aa_requested_nob = requested_nob;
1298 aa->aa_nio_count = niocount;
1299 aa->aa_page_count = page_count;
1303 INIT_LIST_HEAD(&aa->aa_oaps);
1306 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1307 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1308 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1309 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1313 ptlrpc_req_finished(req);
1318 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1319 __u32 client_cksum, __u32 server_cksum, int nob,
1320 size_t page_count, struct brw_page **pga,
1321 cksum_type_t client_cksum_type)
1325 cksum_type_t cksum_type;
1327 if (server_cksum == client_cksum) {
1328 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1332 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1334 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1337 if (cksum_type != client_cksum_type)
1338 msg = "the server did not use the checksum type specified in "
1339 "the original request - likely a protocol problem";
1340 else if (new_cksum == server_cksum)
1341 msg = "changed on the client after we checksummed it - "
1342 "likely false positive due to mmap IO (bug 11742)";
1343 else if (new_cksum == client_cksum)
1344 msg = "changed in transit before arrival at OST";
1346 msg = "changed in transit AND doesn't match the original - "
1347 "likely false positive due to mmap IO (bug 11742)";
1349 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1350 " object "DOSTID" extent [%llu-%llu]\n",
1351 msg, libcfs_nid2str(peer->nid),
1352 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1353 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1354 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1355 POSTID(&oa->o_oi), pga[0]->off,
1356 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1357 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1358 "client csum now %x\n", client_cksum, client_cksum_type,
1359 server_cksum, cksum_type, new_cksum);
1363 /* Note rc enters this function as number of bytes transferred */
1364 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1366 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1367 const struct lnet_process_id *peer =
1368 &req->rq_import->imp_connection->c_peer;
1369 struct client_obd *cli = aa->aa_cli;
1370 struct ost_body *body;
1371 u32 client_cksum = 0;
1374 if (rc < 0 && rc != -EDQUOT) {
1375 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1379 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1380 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1382 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1386 /* set/clear over quota flag for a uid/gid/projid */
1387 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1388 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1389 unsigned qid[LL_MAXQUOTAS] =
1390 { body->oa.o_uid, body->oa.o_gid,
1391 body->oa.o_projid };
1393 CDEBUG(D_QUOTA, "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1394 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1395 body->oa.o_valid, body->oa.o_flags);
1396 osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
1399 osc_update_grant(cli, body);
1404 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1405 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1407 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1409 CERROR("Unexpected +ve rc %d\n", rc);
1412 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1414 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1417 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1418 check_write_checksum(&body->oa, peer, client_cksum,
1419 body->oa.o_cksum, aa->aa_requested_nob,
1420 aa->aa_page_count, aa->aa_ppga,
1421 cksum_type_unpack(aa->aa_oa->o_flags)))
1424 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1425 aa->aa_page_count, aa->aa_ppga);
1429 /* The rest of this function executes only for OST_READs */
1431 /* if unwrap_bulk failed, return -EAGAIN to retry */
1432 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1434 GOTO(out, rc = -EAGAIN);
1436 if (rc > aa->aa_requested_nob) {
1437 CERROR("Unexpected rc %d (%d requested)\n", rc,
1438 aa->aa_requested_nob);
1442 if (rc != req->rq_bulk->bd_nob_transferred) {
1443 CERROR ("Unexpected rc %d (%d transferred)\n",
1444 rc, req->rq_bulk->bd_nob_transferred);
1448 if (rc < aa->aa_requested_nob)
1449 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1451 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1452 static int cksum_counter;
1453 u32 server_cksum = body->oa.o_cksum;
1456 cksum_type_t cksum_type;
1458 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1459 body->oa.o_flags : 0);
1460 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1461 aa->aa_ppga, OST_READ,
1464 if (peer->nid != req->rq_bulk->bd_sender) {
1466 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1469 if (server_cksum != client_cksum) {
1470 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1471 "%s%s%s inode "DFID" object "DOSTID
1472 " extent [%llu-%llu]\n",
1473 req->rq_import->imp_obd->obd_name,
1474 libcfs_nid2str(peer->nid),
1476 body->oa.o_valid & OBD_MD_FLFID ?
1477 body->oa.o_parent_seq : (__u64)0,
1478 body->oa.o_valid & OBD_MD_FLFID ?
1479 body->oa.o_parent_oid : 0,
1480 body->oa.o_valid & OBD_MD_FLFID ?
1481 body->oa.o_parent_ver : 0,
1482 POSTID(&body->oa.o_oi),
1483 aa->aa_ppga[0]->off,
1484 aa->aa_ppga[aa->aa_page_count-1]->off +
1485 aa->aa_ppga[aa->aa_page_count-1]->count -
1487 CERROR("client %x, server %x, cksum_type %x\n",
1488 client_cksum, server_cksum, cksum_type);
1490 aa->aa_oa->o_cksum = client_cksum;
1494 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1497 } else if (unlikely(client_cksum)) {
1498 static int cksum_missed;
1501 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1502 CERROR("Checksum %u requested from %s but not sent\n",
1503 cksum_missed, libcfs_nid2str(peer->nid));
1509 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1510 aa->aa_oa, &body->oa);
1515 static int osc_brw_redo_request(struct ptlrpc_request *request,
1516 struct osc_brw_async_args *aa, int rc)
1518 struct ptlrpc_request *new_req;
1519 struct osc_brw_async_args *new_aa;
1520 struct osc_async_page *oap;
1523 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1524 "redo for recoverable error %d", rc);
1526 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1527 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1528 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1529 aa->aa_ppga, &new_req, 1);
1533 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1534 if (oap->oap_request != NULL) {
1535 LASSERTF(request == oap->oap_request,
1536 "request %p != oap_request %p\n",
1537 request, oap->oap_request);
1538 if (oap->oap_interrupted) {
1539 ptlrpc_req_finished(new_req);
1544 /* New request takes over pga and oaps from old request.
1545 * Note that copying a list_head doesn't work, need to move it... */
1547 new_req->rq_interpret_reply = request->rq_interpret_reply;
1548 new_req->rq_async_args = request->rq_async_args;
1549 new_req->rq_commit_cb = request->rq_commit_cb;
1550 /* cap resend delay to the current request timeout, this is similar to
1551 * what ptlrpc does (see after_reply()) */
1552 if (aa->aa_resends > new_req->rq_timeout)
1553 new_req->rq_sent = cfs_time_current_sec() + new_req->rq_timeout;
1555 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1556 new_req->rq_generation_set = 1;
1557 new_req->rq_import_generation = request->rq_import_generation;
1559 new_aa = ptlrpc_req_async_args(new_req);
1561 INIT_LIST_HEAD(&new_aa->aa_oaps);
1562 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1563 INIT_LIST_HEAD(&new_aa->aa_exts);
1564 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1565 new_aa->aa_resends = aa->aa_resends;
1567 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1568 if (oap->oap_request) {
1569 ptlrpc_req_finished(oap->oap_request);
1570 oap->oap_request = ptlrpc_request_addref(new_req);
1574 /* XXX: This code will run into problem if we're going to support
1575 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1576 * and wait for all of them to be finished. We should inherit request
1577 * set from old request. */
1578 ptlrpcd_add_req(new_req);
1580 DEBUG_REQ(D_INFO, new_req, "new request");
1585 * ugh, we want disk allocation on the target to happen in offset order. we'll
1586 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1587 * fine for our small page arrays and doesn't require allocation. its an
1588 * insertion sort that swaps elements that are strides apart, shrinking the
1589 * stride down until its '1' and the array is sorted.
1591 static void sort_brw_pages(struct brw_page **array, int num)
1594 struct brw_page *tmp;
1598 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1603 for (i = stride ; i < num ; i++) {
1606 while (j >= stride && array[j - stride]->off > tmp->off) {
1607 array[j] = array[j - stride];
1612 } while (stride > 1);
1615 static void osc_release_ppga(struct brw_page **ppga, size_t count)
1617 LASSERT(ppga != NULL);
1618 OBD_FREE(ppga, sizeof(*ppga) * count);
1621 static int brw_interpret(const struct lu_env *env,
1622 struct ptlrpc_request *req, void *data, int rc)
1624 struct osc_brw_async_args *aa = data;
1625 struct osc_extent *ext;
1626 struct osc_extent *tmp;
1627 struct client_obd *cli = aa->aa_cli;
1630 rc = osc_brw_fini_request(req, rc);
1631 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1632 /* When server return -EINPROGRESS, client should always retry
1633 * regardless of the number of times the bulk was resent already. */
1634 if (osc_recoverable_error(rc)) {
1635 if (req->rq_import_generation !=
1636 req->rq_import->imp_generation) {
1637 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1638 ""DOSTID", rc = %d.\n",
1639 req->rq_import->imp_obd->obd_name,
1640 POSTID(&aa->aa_oa->o_oi), rc);
1641 } else if (rc == -EINPROGRESS ||
1642 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1643 rc = osc_brw_redo_request(req, aa, rc);
1645 CERROR("%s: too many resent retries for object: "
1646 "%llu:%llu, rc = %d.\n",
1647 req->rq_import->imp_obd->obd_name,
1648 POSTID(&aa->aa_oa->o_oi), rc);
1653 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1658 struct obdo *oa = aa->aa_oa;
1659 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1660 unsigned long valid = 0;
1661 struct cl_object *obj;
1662 struct osc_async_page *last;
1664 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
1665 obj = osc2cl(last->oap_obj);
1667 cl_object_attr_lock(obj);
1668 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1669 attr->cat_blocks = oa->o_blocks;
1670 valid |= CAT_BLOCKS;
1672 if (oa->o_valid & OBD_MD_FLMTIME) {
1673 attr->cat_mtime = oa->o_mtime;
1676 if (oa->o_valid & OBD_MD_FLATIME) {
1677 attr->cat_atime = oa->o_atime;
1680 if (oa->o_valid & OBD_MD_FLCTIME) {
1681 attr->cat_ctime = oa->o_ctime;
1685 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1686 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
1687 loff_t last_off = last->oap_count + last->oap_obj_off +
1690 /* Change file size if this is an out of quota or
1691 * direct IO write and it extends the file size */
1692 if (loi->loi_lvb.lvb_size < last_off) {
1693 attr->cat_size = last_off;
1696 /* Extend KMS if it's not a lockless write */
1697 if (loi->loi_kms < last_off &&
1698 oap2osc_page(last)->ops_srvlock == 0) {
1699 attr->cat_kms = last_off;
1705 cl_object_attr_update(env, obj, attr, valid);
1706 cl_object_attr_unlock(obj);
1708 OBDO_FREE(aa->aa_oa);
1710 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
1711 osc_inc_unstable_pages(req);
1713 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1714 list_del_init(&ext->oe_link);
1715 osc_extent_finish(env, ext, 1, rc);
1717 LASSERT(list_empty(&aa->aa_exts));
1718 LASSERT(list_empty(&aa->aa_oaps));
1720 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1721 ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
1723 spin_lock(&cli->cl_loi_list_lock);
1724 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1725 * is called so we know whether to go to sync BRWs or wait for more
1726 * RPCs to complete */
1727 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1728 cli->cl_w_in_flight--;
1730 cli->cl_r_in_flight--;
1731 osc_wake_cache_waiters(cli);
1732 spin_unlock(&cli->cl_loi_list_lock);
1734 osc_io_unplug(env, cli, NULL);
1738 static void brw_commit(struct ptlrpc_request *req)
1740 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
1741 * this called via the rq_commit_cb, I need to ensure
1742 * osc_dec_unstable_pages is still called. Otherwise unstable
1743 * pages may be leaked. */
1744 spin_lock(&req->rq_lock);
1745 if (likely(req->rq_unstable)) {
1746 req->rq_unstable = 0;
1747 spin_unlock(&req->rq_lock);
1749 osc_dec_unstable_pages(req);
1751 req->rq_committed = 1;
1752 spin_unlock(&req->rq_lock);
1757 * Build an RPC by the list of extent @ext_list. The caller must ensure
1758 * that the total pages in this list are NOT over max pages per RPC.
1759 * Extents in the list must be in OES_RPC state.
1761 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
1762 struct list_head *ext_list, int cmd)
1764 struct ptlrpc_request *req = NULL;
1765 struct osc_extent *ext;
1766 struct brw_page **pga = NULL;
1767 struct osc_brw_async_args *aa = NULL;
1768 struct obdo *oa = NULL;
1769 struct osc_async_page *oap;
1770 struct osc_object *obj = NULL;
1771 struct cl_req_attr *crattr = NULL;
1772 loff_t starting_offset = OBD_OBJECT_EOF;
1773 loff_t ending_offset = 0;
1777 bool soft_sync = false;
1778 bool interrupted = false;
1782 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1783 struct ost_body *body;
1785 LASSERT(!list_empty(ext_list));
1787 /* add pages into rpc_list to build BRW rpc */
1788 list_for_each_entry(ext, ext_list, oe_link) {
1789 LASSERT(ext->oe_state == OES_RPC);
1790 mem_tight |= ext->oe_memalloc;
1791 grant += ext->oe_grants;
1792 page_count += ext->oe_nr_pages;
1797 soft_sync = osc_over_unstable_soft_limit(cli);
1799 mpflag = cfs_memory_pressure_get_and_set();
1801 OBD_ALLOC(pga, sizeof(*pga) * page_count);
1803 GOTO(out, rc = -ENOMEM);
1807 GOTO(out, rc = -ENOMEM);
1810 list_for_each_entry(ext, ext_list, oe_link) {
1811 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
1813 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
1815 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
1816 pga[i] = &oap->oap_brw_page;
1817 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
1820 list_add_tail(&oap->oap_rpc_item, &rpc_list);
1821 if (starting_offset == OBD_OBJECT_EOF ||
1822 starting_offset > oap->oap_obj_off)
1823 starting_offset = oap->oap_obj_off;
1825 LASSERT(oap->oap_page_off == 0);
1826 if (ending_offset < oap->oap_obj_off + oap->oap_count)
1827 ending_offset = oap->oap_obj_off +
1830 LASSERT(oap->oap_page_off + oap->oap_count ==
1832 if (oap->oap_interrupted)
1837 /* first page in the list */
1838 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
1840 crattr = &osc_env_info(env)->oti_req_attr;
1841 memset(crattr, 0, sizeof(*crattr));
1842 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
1843 crattr->cra_flags = ~0ULL;
1844 crattr->cra_page = oap2cl_page(oap);
1845 crattr->cra_oa = oa;
1846 cl_req_attr_set(env, osc2cl(obj), crattr);
1848 if (cmd == OBD_BRW_WRITE)
1849 oa->o_grant_used = grant;
1851 sort_brw_pages(pga, page_count);
1852 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
1854 CERROR("prep_req failed: %d\n", rc);
1858 req->rq_commit_cb = brw_commit;
1859 req->rq_interpret_reply = brw_interpret;
1860 req->rq_memalloc = mem_tight != 0;
1861 oap->oap_request = ptlrpc_request_addref(req);
1862 if (interrupted && !req->rq_intr)
1863 ptlrpc_mark_interrupted(req);
1865 /* Need to update the timestamps after the request is built in case
1866 * we race with setattr (locally or in queue at OST). If OST gets
1867 * later setattr before earlier BRW (as determined by the request xid),
1868 * the OST will not use BRW timestamps. Sadly, there is no obvious
1869 * way to do this in a single call. bug 10150 */
1870 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
1871 crattr->cra_oa = &body->oa;
1872 crattr->cra_flags = OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME;
1873 cl_req_attr_set(env, osc2cl(obj), crattr);
1874 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
1876 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1877 aa = ptlrpc_req_async_args(req);
1878 INIT_LIST_HEAD(&aa->aa_oaps);
1879 list_splice_init(&rpc_list, &aa->aa_oaps);
1880 INIT_LIST_HEAD(&aa->aa_exts);
1881 list_splice_init(ext_list, &aa->aa_exts);
1883 spin_lock(&cli->cl_loi_list_lock);
1884 starting_offset >>= PAGE_SHIFT;
1885 if (cmd == OBD_BRW_READ) {
1886 cli->cl_r_in_flight++;
1887 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
1888 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
1889 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
1890 starting_offset + 1);
1892 cli->cl_w_in_flight++;
1893 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
1894 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
1895 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
1896 starting_offset + 1);
1898 spin_unlock(&cli->cl_loi_list_lock);
1900 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
1901 page_count, aa, cli->cl_r_in_flight,
1902 cli->cl_w_in_flight);
1903 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
1905 ptlrpcd_add_req(req);
1911 cfs_memory_pressure_restore(mpflag);
1914 LASSERT(req == NULL);
1919 OBD_FREE(pga, sizeof(*pga) * page_count);
1920 /* this should happen rarely and is pretty bad, it makes the
1921 * pending list not follow the dirty order */
1922 while (!list_empty(ext_list)) {
1923 ext = list_entry(ext_list->next, struct osc_extent,
1925 list_del_init(&ext->oe_link);
1926 osc_extent_finish(env, ext, 0, rc);
1932 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
1936 LASSERT(lock != NULL);
1938 lock_res_and_lock(lock);
1940 if (lock->l_ast_data == NULL)
1941 lock->l_ast_data = data;
1942 if (lock->l_ast_data == data)
1945 unlock_res_and_lock(lock);
1950 static int osc_enqueue_fini(struct ptlrpc_request *req,
1951 osc_enqueue_upcall_f upcall, void *cookie,
1952 struct lustre_handle *lockh, enum ldlm_mode mode,
1953 __u64 *flags, int agl, int errcode)
1955 bool intent = *flags & LDLM_FL_HAS_INTENT;
1959 /* The request was created before ldlm_cli_enqueue call. */
1960 if (intent && errcode == ELDLM_LOCK_ABORTED) {
1961 struct ldlm_reply *rep;
1963 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1964 LASSERT(rep != NULL);
1966 rep->lock_policy_res1 =
1967 ptlrpc_status_ntoh(rep->lock_policy_res1);
1968 if (rep->lock_policy_res1)
1969 errcode = rep->lock_policy_res1;
1971 *flags |= LDLM_FL_LVB_READY;
1972 } else if (errcode == ELDLM_OK) {
1973 *flags |= LDLM_FL_LVB_READY;
1976 /* Call the update callback. */
1977 rc = (*upcall)(cookie, lockh, errcode);
1979 /* release the reference taken in ldlm_cli_enqueue() */
1980 if (errcode == ELDLM_LOCK_MATCHED)
1982 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
1983 ldlm_lock_decref(lockh, mode);
1988 static int osc_enqueue_interpret(const struct lu_env *env,
1989 struct ptlrpc_request *req,
1990 struct osc_enqueue_args *aa, int rc)
1992 struct ldlm_lock *lock;
1993 struct lustre_handle *lockh = &aa->oa_lockh;
1994 enum ldlm_mode mode = aa->oa_mode;
1995 struct ost_lvb *lvb = aa->oa_lvb;
1996 __u32 lvb_len = sizeof(*lvb);
2001 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2003 lock = ldlm_handle2lock(lockh);
2004 LASSERTF(lock != NULL,
2005 "lockh %#llx, req %p, aa %p - client evicted?\n",
2006 lockh->cookie, req, aa);
2008 /* Take an additional reference so that a blocking AST that
2009 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2010 * to arrive after an upcall has been executed by
2011 * osc_enqueue_fini(). */
2012 ldlm_lock_addref(lockh, mode);
2014 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2015 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2017 /* Let CP AST to grant the lock first. */
2018 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2021 LASSERT(aa->oa_lvb == NULL);
2022 LASSERT(aa->oa_flags == NULL);
2023 aa->oa_flags = &flags;
2026 /* Complete obtaining the lock procedure. */
2027 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2028 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2030 /* Complete osc stuff. */
2031 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2032 aa->oa_flags, aa->oa_agl, rc);
2034 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2036 ldlm_lock_decref(lockh, mode);
2037 LDLM_LOCK_PUT(lock);
2041 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2043 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2044 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2045 * other synchronous requests, however keeping some locks and trying to obtain
2046 * others may take a considerable amount of time in a case of ost failure; and
2047 * when other sync requests do not get released lock from a client, the client
2048 * is evicted from the cluster -- such scenarious make the life difficult, so
2049 * release locks just after they are obtained. */
2050 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2051 __u64 *flags, union ldlm_policy_data *policy,
2052 struct ost_lvb *lvb, int kms_valid,
2053 osc_enqueue_upcall_f upcall, void *cookie,
2054 struct ldlm_enqueue_info *einfo,
2055 struct ptlrpc_request_set *rqset, int async, int agl)
2057 struct obd_device *obd = exp->exp_obd;
2058 struct lustre_handle lockh = { 0 };
2059 struct ptlrpc_request *req = NULL;
2060 int intent = *flags & LDLM_FL_HAS_INTENT;
2061 __u64 match_flags = *flags;
2062 enum ldlm_mode mode;
2066 /* Filesystem lock extents are extended to page boundaries so that
2067 * dealing with the page cache is a little smoother. */
2068 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2069 policy->l_extent.end |= ~PAGE_MASK;
2072 * kms is not valid when either object is completely fresh (so that no
2073 * locks are cached), or object was evicted. In the latter case cached
2074 * lock cannot be used, because it would prime inode state with
2075 * potentially stale LVB.
2080 /* Next, search for already existing extent locks that will cover us */
2081 /* If we're trying to read, we also search for an existing PW lock. The
2082 * VFS and page cache already protect us locally, so lots of readers/
2083 * writers can share a single PW lock.
2085 * There are problems with conversion deadlocks, so instead of
2086 * converting a read lock to a write lock, we'll just enqueue a new
2089 * At some point we should cancel the read lock instead of making them
2090 * send us a blocking callback, but there are problems with canceling
2091 * locks out from other users right now, too. */
2092 mode = einfo->ei_mode;
2093 if (einfo->ei_mode == LCK_PR)
2096 match_flags |= LDLM_FL_LVB_READY;
2098 match_flags |= LDLM_FL_BLOCK_GRANTED;
2099 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2100 einfo->ei_type, policy, mode, &lockh, 0);
2102 struct ldlm_lock *matched;
2104 if (*flags & LDLM_FL_TEST_LOCK)
2107 matched = ldlm_handle2lock(&lockh);
2109 /* AGL enqueues DLM locks speculatively. Therefore if
2110 * it already exists a DLM lock, it wll just inform the
2111 * caller to cancel the AGL process for this stripe. */
2112 ldlm_lock_decref(&lockh, mode);
2113 LDLM_LOCK_PUT(matched);
2115 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2116 *flags |= LDLM_FL_LVB_READY;
2118 /* We already have a lock, and it's referenced. */
2119 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2121 ldlm_lock_decref(&lockh, mode);
2122 LDLM_LOCK_PUT(matched);
2125 ldlm_lock_decref(&lockh, mode);
2126 LDLM_LOCK_PUT(matched);
2131 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2135 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2136 &RQF_LDLM_ENQUEUE_LVB);
2140 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2142 ptlrpc_request_free(req);
2146 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2148 ptlrpc_request_set_replen(req);
2151 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2152 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2154 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2155 sizeof(*lvb), LVB_T_OST, &lockh, async);
2158 struct osc_enqueue_args *aa;
2159 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2160 aa = ptlrpc_req_async_args(req);
2162 aa->oa_mode = einfo->ei_mode;
2163 aa->oa_type = einfo->ei_type;
2164 lustre_handle_copy(&aa->oa_lockh, &lockh);
2165 aa->oa_upcall = upcall;
2166 aa->oa_cookie = cookie;
2169 aa->oa_flags = flags;
2172 /* AGL is essentially to enqueue an DLM lock
2173 * in advance, so we don't care about the
2174 * result of AGL enqueue. */
2176 aa->oa_flags = NULL;
2179 req->rq_interpret_reply =
2180 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2181 if (rqset == PTLRPCD_SET)
2182 ptlrpcd_add_req(req);
2184 ptlrpc_set_add_req(rqset, req);
2185 } else if (intent) {
2186 ptlrpc_req_finished(req);
2191 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2194 ptlrpc_req_finished(req);
2199 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2200 enum ldlm_type type, union ldlm_policy_data *policy,
2201 enum ldlm_mode mode, __u64 *flags, void *data,
2202 struct lustre_handle *lockh, int unref)
2204 struct obd_device *obd = exp->exp_obd;
2205 __u64 lflags = *flags;
2209 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2212 /* Filesystem lock extents are extended to page boundaries so that
2213 * dealing with the page cache is a little smoother */
2214 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2215 policy->l_extent.end |= ~PAGE_MASK;
2217 /* Next, search for already existing extent locks that will cover us */
2218 /* If we're trying to read, we also search for an existing PW lock. The
2219 * VFS and page cache already protect us locally, so lots of readers/
2220 * writers can share a single PW lock. */
2224 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2225 res_id, type, policy, rc, lockh, unref);
2226 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2230 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2232 LASSERT(lock != NULL);
2233 if (!osc_set_lock_data(lock, data)) {
2234 ldlm_lock_decref(lockh, rc);
2237 LDLM_LOCK_PUT(lock);
2242 static int osc_statfs_interpret(const struct lu_env *env,
2243 struct ptlrpc_request *req,
2244 struct osc_async_args *aa, int rc)
2246 struct obd_statfs *msfs;
2250 /* The request has in fact never been sent
2251 * due to issues at a higher level (LOV).
2252 * Exit immediately since the caller is
2253 * aware of the problem and takes care
2254 * of the clean up */
2257 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2258 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2264 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2266 GOTO(out, rc = -EPROTO);
2269 *aa->aa_oi->oi_osfs = *msfs;
2271 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2275 static int osc_statfs_async(struct obd_export *exp,
2276 struct obd_info *oinfo, __u64 max_age,
2277 struct ptlrpc_request_set *rqset)
2279 struct obd_device *obd = class_exp2obd(exp);
2280 struct ptlrpc_request *req;
2281 struct osc_async_args *aa;
2285 /* We could possibly pass max_age in the request (as an absolute
2286 * timestamp or a "seconds.usec ago") so the target can avoid doing
2287 * extra calls into the filesystem if that isn't necessary (e.g.
2288 * during mount that would help a bit). Having relative timestamps
2289 * is not so great if request processing is slow, while absolute
2290 * timestamps are not ideal because they need time synchronization. */
2291 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2295 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2297 ptlrpc_request_free(req);
2300 ptlrpc_request_set_replen(req);
2301 req->rq_request_portal = OST_CREATE_PORTAL;
2302 ptlrpc_at_set_req_timeout(req);
2304 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2305 /* procfs requests not want stat in wait for avoid deadlock */
2306 req->rq_no_resend = 1;
2307 req->rq_no_delay = 1;
2310 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2311 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2312 aa = ptlrpc_req_async_args(req);
2315 ptlrpc_set_add_req(rqset, req);
2319 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2320 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
2322 struct obd_device *obd = class_exp2obd(exp);
2323 struct obd_statfs *msfs;
2324 struct ptlrpc_request *req;
2325 struct obd_import *imp = NULL;
2329 /*Since the request might also come from lprocfs, so we need
2330 *sync this with client_disconnect_export Bug15684*/
2331 down_read(&obd->u.cli.cl_sem);
2332 if (obd->u.cli.cl_import)
2333 imp = class_import_get(obd->u.cli.cl_import);
2334 up_read(&obd->u.cli.cl_sem);
2338 /* We could possibly pass max_age in the request (as an absolute
2339 * timestamp or a "seconds.usec ago") so the target can avoid doing
2340 * extra calls into the filesystem if that isn't necessary (e.g.
2341 * during mount that would help a bit). Having relative timestamps
2342 * is not so great if request processing is slow, while absolute
2343 * timestamps are not ideal because they need time synchronization. */
2344 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2346 class_import_put(imp);
2351 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2353 ptlrpc_request_free(req);
2356 ptlrpc_request_set_replen(req);
2357 req->rq_request_portal = OST_CREATE_PORTAL;
2358 ptlrpc_at_set_req_timeout(req);
2360 if (flags & OBD_STATFS_NODELAY) {
2361 /* procfs requests not want stat in wait for avoid deadlock */
2362 req->rq_no_resend = 1;
2363 req->rq_no_delay = 1;
2366 rc = ptlrpc_queue_wait(req);
2370 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2372 GOTO(out, rc = -EPROTO);
2379 ptlrpc_req_finished(req);
2383 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2384 void *karg, void __user *uarg)
2386 struct obd_device *obd = exp->exp_obd;
2387 struct obd_ioctl_data *data = karg;
2391 if (!try_module_get(THIS_MODULE)) {
2392 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2393 module_name(THIS_MODULE));
2397 case OBD_IOC_CLIENT_RECOVER:
2398 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2399 data->ioc_inlbuf1, 0);
2403 case IOC_OSC_SET_ACTIVE:
2404 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2407 case OBD_IOC_PING_TARGET:
2408 err = ptlrpc_obd_ping(obd);
2411 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2412 cmd, current_comm());
2413 GOTO(out, err = -ENOTTY);
2416 module_put(THIS_MODULE);
2420 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2421 u32 keylen, void *key,
2422 u32 vallen, void *val,
2423 struct ptlrpc_request_set *set)
2425 struct ptlrpc_request *req;
2426 struct obd_device *obd = exp->exp_obd;
2427 struct obd_import *imp = class_exp2cliimp(exp);
2432 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2434 if (KEY_IS(KEY_CHECKSUM)) {
2435 if (vallen != sizeof(int))
2437 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2441 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2442 sptlrpc_conf_client_adapt(obd);
2446 if (KEY_IS(KEY_FLUSH_CTX)) {
2447 sptlrpc_import_flush_my_ctx(imp);
2451 if (KEY_IS(KEY_CACHE_SET)) {
2452 struct client_obd *cli = &obd->u.cli;
2454 LASSERT(cli->cl_cache == NULL); /* only once */
2455 cli->cl_cache = (struct cl_client_cache *)val;
2456 cl_cache_incref(cli->cl_cache);
2457 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2459 /* add this osc into entity list */
2460 LASSERT(list_empty(&cli->cl_lru_osc));
2461 spin_lock(&cli->cl_cache->ccc_lru_lock);
2462 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2463 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2468 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2469 struct client_obd *cli = &obd->u.cli;
2470 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2471 long target = *(long *)val;
2473 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2478 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2481 /* We pass all other commands directly to OST. Since nobody calls osc
2482 methods directly and everybody is supposed to go through LOV, we
2483 assume lov checked invalid values for us.
2484 The only recognised values so far are evict_by_nid and mds_conn.
2485 Even if something bad goes through, we'd get a -EINVAL from OST
2488 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2489 &RQF_OST_SET_GRANT_INFO :
2494 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2495 RCL_CLIENT, keylen);
2496 if (!KEY_IS(KEY_GRANT_SHRINK))
2497 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2498 RCL_CLIENT, vallen);
2499 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2501 ptlrpc_request_free(req);
2505 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2506 memcpy(tmp, key, keylen);
2507 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2510 memcpy(tmp, val, vallen);
2512 if (KEY_IS(KEY_GRANT_SHRINK)) {
2513 struct osc_grant_args *aa;
2516 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2517 aa = ptlrpc_req_async_args(req);
2520 ptlrpc_req_finished(req);
2523 *oa = ((struct ost_body *)val)->oa;
2525 req->rq_interpret_reply = osc_shrink_grant_interpret;
2528 ptlrpc_request_set_replen(req);
2529 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2530 LASSERT(set != NULL);
2531 ptlrpc_set_add_req(set, req);
2532 ptlrpc_check_set(NULL, set);
2534 ptlrpcd_add_req(req);
2540 static int osc_reconnect(const struct lu_env *env,
2541 struct obd_export *exp, struct obd_device *obd,
2542 struct obd_uuid *cluuid,
2543 struct obd_connect_data *data,
2546 struct client_obd *cli = &obd->u.cli;
2548 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2552 spin_lock(&cli->cl_loi_list_lock);
2553 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2554 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM)
2555 grant += cli->cl_dirty_grant;
2557 grant += cli->cl_dirty_pages << PAGE_SHIFT;
2558 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
2559 lost_grant = cli->cl_lost_grant;
2560 cli->cl_lost_grant = 0;
2561 spin_unlock(&cli->cl_loi_list_lock);
2563 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
2564 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
2565 data->ocd_version, data->ocd_grant, lost_grant);
2571 static int osc_disconnect(struct obd_export *exp)
2573 struct obd_device *obd = class_exp2obd(exp);
2576 rc = client_disconnect_export(exp);
2578 * Initially we put del_shrink_grant before disconnect_export, but it
2579 * causes the following problem if setup (connect) and cleanup
2580 * (disconnect) are tangled together.
2581 * connect p1 disconnect p2
2582 * ptlrpc_connect_import
2583 * ............... class_manual_cleanup
2586 * ptlrpc_connect_interrupt
2588 * add this client to shrink list
2590 * Bang! pinger trigger the shrink.
2591 * So the osc should be disconnected from the shrink list, after we
2592 * are sure the import has been destroyed. BUG18662
2594 if (obd->u.cli.cl_import == NULL)
2595 osc_del_shrink_grant(&obd->u.cli);
2599 static int osc_ldlm_resource_invalidate(struct cfs_hash *hs,
2600 struct cfs_hash_bd *bd, struct hlist_node *hnode, void *arg)
2602 struct lu_env *env = arg;
2603 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
2604 struct ldlm_lock *lock;
2605 struct osc_object *osc = NULL;
2609 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
2610 if (lock->l_ast_data != NULL && osc == NULL) {
2611 osc = lock->l_ast_data;
2612 cl_object_get(osc2cl(osc));
2615 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
2616 * by the 2nd round of ldlm_namespace_clean() call in
2617 * osc_import_event(). */
2618 ldlm_clear_cleaned(lock);
2623 osc_object_invalidate(env, osc);
2624 cl_object_put(env, osc2cl(osc));
2630 static int osc_import_event(struct obd_device *obd,
2631 struct obd_import *imp,
2632 enum obd_import_event event)
2634 struct client_obd *cli;
2638 LASSERT(imp->imp_obd == obd);
2641 case IMP_EVENT_DISCON: {
2643 spin_lock(&cli->cl_loi_list_lock);
2644 cli->cl_avail_grant = 0;
2645 cli->cl_lost_grant = 0;
2646 spin_unlock(&cli->cl_loi_list_lock);
2649 case IMP_EVENT_INACTIVE: {
2650 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
2653 case IMP_EVENT_INVALIDATE: {
2654 struct ldlm_namespace *ns = obd->obd_namespace;
2658 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2660 env = cl_env_get(&refcheck);
2662 osc_io_unplug(env, &obd->u.cli, NULL);
2664 cfs_hash_for_each_nolock(ns->ns_rs_hash,
2665 osc_ldlm_resource_invalidate,
2667 cl_env_put(env, &refcheck);
2669 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2674 case IMP_EVENT_ACTIVE: {
2675 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
2678 case IMP_EVENT_OCD: {
2679 struct obd_connect_data *ocd = &imp->imp_connect_data;
2681 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
2682 osc_init_grant(&obd->u.cli, ocd);
2685 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
2686 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
2688 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
2691 case IMP_EVENT_DEACTIVATE: {
2692 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
2695 case IMP_EVENT_ACTIVATE: {
2696 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
2700 CERROR("Unknown import event %d\n", event);
2707 * Determine whether the lock can be canceled before replaying the lock
2708 * during recovery, see bug16774 for detailed information.
2710 * \retval zero the lock can't be canceled
2711 * \retval other ok to cancel
2713 static int osc_cancel_weight(struct ldlm_lock *lock)
2716 * Cancel all unused and granted extent lock.
2718 if (lock->l_resource->lr_type == LDLM_EXTENT &&
2719 lock->l_granted_mode == lock->l_req_mode &&
2720 osc_ldlm_weigh_ast(lock) == 0)
2726 static int brw_queue_work(const struct lu_env *env, void *data)
2728 struct client_obd *cli = data;
2730 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
2732 osc_io_unplug(env, cli, NULL);
2736 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2738 struct client_obd *cli = &obd->u.cli;
2739 struct obd_type *type;
2747 rc = ptlrpcd_addref();
2751 rc = client_obd_setup(obd, lcfg);
2753 GOTO(out_ptlrpcd, rc);
2755 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
2756 if (IS_ERR(handler))
2757 GOTO(out_client_setup, rc = PTR_ERR(handler));
2758 cli->cl_writeback_work = handler;
2760 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
2761 if (IS_ERR(handler))
2762 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2763 cli->cl_lru_work = handler;
2765 rc = osc_quota_setup(obd);
2767 GOTO(out_ptlrpcd_work, rc);
2769 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
2771 #ifdef CONFIG_PROC_FS
2772 obd->obd_vars = lprocfs_osc_obd_vars;
2774 /* If this is true then both client (osc) and server (osp) are on the
2775 * same node. The osp layer if loaded first will register the osc proc
2776 * directory. In that case this obd_device will be attached its proc
2777 * tree to type->typ_procsym instead of obd->obd_type->typ_procroot. */
2778 type = class_search_type(LUSTRE_OSP_NAME);
2779 if (type && type->typ_procsym) {
2780 obd->obd_proc_entry = lprocfs_register(obd->obd_name,
2782 obd->obd_vars, obd);
2783 if (IS_ERR(obd->obd_proc_entry)) {
2784 rc = PTR_ERR(obd->obd_proc_entry);
2785 CERROR("error %d setting up lprocfs for %s\n", rc,
2787 obd->obd_proc_entry = NULL;
2790 rc = lprocfs_obd_setup(obd);
2793 /* If the basic OSC proc tree construction succeeded then
2794 * lets do the rest. */
2796 lproc_osc_attach_seqstat(obd);
2797 sptlrpc_lprocfs_cliobd_attach(obd);
2798 ptlrpc_lprocfs_register_obd(obd);
2802 * We try to control the total number of requests with a upper limit
2803 * osc_reqpool_maxreqcount. There might be some race which will cause
2804 * over-limit allocation, but it is fine.
2806 req_count = atomic_read(&osc_pool_req_count);
2807 if (req_count < osc_reqpool_maxreqcount) {
2808 adding = cli->cl_max_rpcs_in_flight + 2;
2809 if (req_count + adding > osc_reqpool_maxreqcount)
2810 adding = osc_reqpool_maxreqcount - req_count;
2812 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
2813 atomic_add(added, &osc_pool_req_count);
2816 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
2817 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
2819 spin_lock(&osc_shrink_lock);
2820 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
2821 spin_unlock(&osc_shrink_lock);
2826 if (cli->cl_writeback_work != NULL) {
2827 ptlrpcd_destroy_work(cli->cl_writeback_work);
2828 cli->cl_writeback_work = NULL;
2830 if (cli->cl_lru_work != NULL) {
2831 ptlrpcd_destroy_work(cli->cl_lru_work);
2832 cli->cl_lru_work = NULL;
2835 client_obd_cleanup(obd);
2841 static int osc_precleanup(struct obd_device *obd)
2843 struct client_obd *cli = &obd->u.cli;
2847 * for echo client, export may be on zombie list, wait for
2848 * zombie thread to cull it, because cli.cl_import will be
2849 * cleared in client_disconnect_export():
2850 * class_export_destroy() -> obd_cleanup() ->
2851 * echo_device_free() -> echo_client_cleanup() ->
2852 * obd_disconnect() -> osc_disconnect() ->
2853 * client_disconnect_export()
2855 obd_zombie_barrier();
2856 if (cli->cl_writeback_work) {
2857 ptlrpcd_destroy_work(cli->cl_writeback_work);
2858 cli->cl_writeback_work = NULL;
2861 if (cli->cl_lru_work) {
2862 ptlrpcd_destroy_work(cli->cl_lru_work);
2863 cli->cl_lru_work = NULL;
2866 obd_cleanup_client_import(obd);
2867 ptlrpc_lprocfs_unregister_obd(obd);
2868 lprocfs_obd_cleanup(obd);
2872 int osc_cleanup(struct obd_device *obd)
2874 struct client_obd *cli = &obd->u.cli;
2879 spin_lock(&osc_shrink_lock);
2880 list_del(&cli->cl_shrink_list);
2881 spin_unlock(&osc_shrink_lock);
2884 if (cli->cl_cache != NULL) {
2885 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
2886 spin_lock(&cli->cl_cache->ccc_lru_lock);
2887 list_del_init(&cli->cl_lru_osc);
2888 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2889 cli->cl_lru_left = NULL;
2890 cl_cache_decref(cli->cl_cache);
2891 cli->cl_cache = NULL;
2894 /* free memory of osc quota cache */
2895 osc_quota_cleanup(obd);
2897 rc = client_obd_cleanup(obd);
2903 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
2905 int rc = class_process_proc_param(PARAM_OSC, obd->obd_vars, lcfg, obd);
2906 return rc > 0 ? 0: rc;
2909 static int osc_process_config(struct obd_device *obd, size_t len, void *buf)
2911 return osc_process_config_base(obd, buf);
2914 static struct obd_ops osc_obd_ops = {
2915 .o_owner = THIS_MODULE,
2916 .o_setup = osc_setup,
2917 .o_precleanup = osc_precleanup,
2918 .o_cleanup = osc_cleanup,
2919 .o_add_conn = client_import_add_conn,
2920 .o_del_conn = client_import_del_conn,
2921 .o_connect = client_connect_import,
2922 .o_reconnect = osc_reconnect,
2923 .o_disconnect = osc_disconnect,
2924 .o_statfs = osc_statfs,
2925 .o_statfs_async = osc_statfs_async,
2926 .o_create = osc_create,
2927 .o_destroy = osc_destroy,
2928 .o_getattr = osc_getattr,
2929 .o_setattr = osc_setattr,
2930 .o_iocontrol = osc_iocontrol,
2931 .o_set_info_async = osc_set_info_async,
2932 .o_import_event = osc_import_event,
2933 .o_process_config = osc_process_config,
2934 .o_quotactl = osc_quotactl,
2937 static struct shrinker *osc_cache_shrinker;
2938 struct list_head osc_shrink_list = LIST_HEAD_INIT(osc_shrink_list);
2939 DEFINE_SPINLOCK(osc_shrink_lock);
2941 #ifndef HAVE_SHRINKER_COUNT
2942 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
2944 struct shrink_control scv = {
2945 .nr_to_scan = shrink_param(sc, nr_to_scan),
2946 .gfp_mask = shrink_param(sc, gfp_mask)
2948 #if !defined(HAVE_SHRINKER_WANT_SHRINK_PTR) && !defined(HAVE_SHRINK_CONTROL)
2949 struct shrinker *shrinker = NULL;
2952 (void)osc_cache_shrink_scan(shrinker, &scv);
2954 return osc_cache_shrink_count(shrinker, &scv);
2958 static int __init osc_init(void)
2960 bool enable_proc = true;
2961 struct obd_type *type;
2962 unsigned int reqpool_size;
2963 unsigned int reqsize;
2965 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
2966 osc_cache_shrink_count, osc_cache_shrink_scan);
2969 /* print an address of _any_ initialized kernel symbol from this
2970 * module, to allow debugging with gdb that doesn't support data
2971 * symbols from modules.*/
2972 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
2974 rc = lu_kmem_init(osc_caches);
2978 type = class_search_type(LUSTRE_OSP_NAME);
2979 if (type != NULL && type->typ_procsym != NULL)
2980 enable_proc = false;
2982 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
2983 LUSTRE_OSC_NAME, &osc_device_type);
2987 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
2989 /* This is obviously too much memory, only prevent overflow here */
2990 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
2991 GOTO(out_type, rc = -EINVAL);
2993 reqpool_size = osc_reqpool_mem_max << 20;
2996 while (reqsize < OST_IO_MAXREQSIZE)
2997 reqsize = reqsize << 1;
3000 * We don't enlarge the request count in OSC pool according to
3001 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3002 * tried after normal allocation failed. So a small OSC pool won't
3003 * cause much performance degression in most of cases.
3005 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3007 atomic_set(&osc_pool_req_count, 0);
3008 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3009 ptlrpc_add_rqs_to_pool);
3011 if (osc_rq_pool != NULL)
3015 class_unregister_type(LUSTRE_OSC_NAME);
3017 lu_kmem_fini(osc_caches);
3022 static void __exit osc_exit(void)
3024 remove_shrinker(osc_cache_shrinker);
3025 class_unregister_type(LUSTRE_OSC_NAME);
3026 lu_kmem_fini(osc_caches);
3027 ptlrpc_free_rq_pool(osc_rq_pool);
3030 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3031 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3032 MODULE_VERSION(LUSTRE_VERSION_STRING);
3033 MODULE_LICENSE("GPL");
3035 module_init(osc_init);
3036 module_exit(osc_exit);