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 <lprocfs_status.h>
38 #include <lustre_debug.h>
39 #include <lustre_dlm.h>
40 #include <lustre_fid.h>
41 #include <lustre_ha.h>
42 #include <uapi/linux/lustre/lustre_ioctl.h>
43 #include <lustre_net.h>
44 #include <lustre_obdo.h>
45 #include <uapi/linux/lustre/lustre_param.h>
47 #include <obd_cksum.h>
48 #include <obd_class.h>
49 #include <lustre_osc.h>
51 #include "osc_internal.h"
53 atomic_t osc_pool_req_count;
54 unsigned int osc_reqpool_maxreqcount;
55 struct ptlrpc_request_pool *osc_rq_pool;
57 /* max memory used for request pool, unit is MB */
58 static unsigned int osc_reqpool_mem_max = 5;
59 module_param(osc_reqpool_mem_max, uint, 0444);
61 #define osc_grant_args osc_brw_async_args
63 struct osc_setattr_args {
65 obd_enqueue_update_f sa_upcall;
69 struct osc_fsync_args {
70 struct osc_object *fa_obj;
72 obd_enqueue_update_f fa_upcall;
76 struct osc_ladvise_args {
78 obd_enqueue_update_f la_upcall;
82 static void osc_release_ppga(struct brw_page **ppga, size_t count);
83 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
86 void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
88 struct ost_body *body;
90 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
93 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
96 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
99 struct ptlrpc_request *req;
100 struct ost_body *body;
104 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
108 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
110 ptlrpc_request_free(req);
114 osc_pack_req_body(req, oa);
116 ptlrpc_request_set_replen(req);
118 rc = ptlrpc_queue_wait(req);
122 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
124 GOTO(out, rc = -EPROTO);
126 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
127 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
129 oa->o_blksize = cli_brw_size(exp->exp_obd);
130 oa->o_valid |= OBD_MD_FLBLKSZ;
134 ptlrpc_req_finished(req);
139 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
142 struct ptlrpc_request *req;
143 struct ost_body *body;
147 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
149 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
153 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
155 ptlrpc_request_free(req);
159 osc_pack_req_body(req, oa);
161 ptlrpc_request_set_replen(req);
163 rc = ptlrpc_queue_wait(req);
167 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
169 GOTO(out, rc = -EPROTO);
171 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
175 ptlrpc_req_finished(req);
180 static int osc_setattr_interpret(const struct lu_env *env,
181 struct ptlrpc_request *req,
182 struct osc_setattr_args *sa, int rc)
184 struct ost_body *body;
190 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
192 GOTO(out, rc = -EPROTO);
194 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
197 rc = sa->sa_upcall(sa->sa_cookie, rc);
201 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
202 obd_enqueue_update_f upcall, void *cookie,
203 struct ptlrpc_request_set *rqset)
205 struct ptlrpc_request *req;
206 struct osc_setattr_args *sa;
211 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
215 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
217 ptlrpc_request_free(req);
221 osc_pack_req_body(req, oa);
223 ptlrpc_request_set_replen(req);
225 /* do mds to ost setattr asynchronously */
227 /* Do not wait for response. */
228 ptlrpcd_add_req(req);
230 req->rq_interpret_reply =
231 (ptlrpc_interpterer_t)osc_setattr_interpret;
233 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
234 sa = ptlrpc_req_async_args(req);
236 sa->sa_upcall = upcall;
237 sa->sa_cookie = cookie;
239 if (rqset == PTLRPCD_SET)
240 ptlrpcd_add_req(req);
242 ptlrpc_set_add_req(rqset, req);
248 static int osc_ladvise_interpret(const struct lu_env *env,
249 struct ptlrpc_request *req,
252 struct osc_ladvise_args *la = arg;
253 struct ost_body *body;
259 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
261 GOTO(out, rc = -EPROTO);
263 *la->la_oa = body->oa;
265 rc = la->la_upcall(la->la_cookie, rc);
270 * If rqset is NULL, do not wait for response. Upcall and cookie could also
271 * be NULL in this case
273 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
274 struct ladvise_hdr *ladvise_hdr,
275 obd_enqueue_update_f upcall, void *cookie,
276 struct ptlrpc_request_set *rqset)
278 struct ptlrpc_request *req;
279 struct ost_body *body;
280 struct osc_ladvise_args *la;
282 struct lu_ladvise *req_ladvise;
283 struct lu_ladvise *ladvise = ladvise_hdr->lah_advise;
284 int num_advise = ladvise_hdr->lah_count;
285 struct ladvise_hdr *req_ladvise_hdr;
288 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_LADVISE);
292 req_capsule_set_size(&req->rq_pill, &RMF_OST_LADVISE, RCL_CLIENT,
293 num_advise * sizeof(*ladvise));
294 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_LADVISE);
296 ptlrpc_request_free(req);
299 req->rq_request_portal = OST_IO_PORTAL;
300 ptlrpc_at_set_req_timeout(req);
302 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
304 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
307 req_ladvise_hdr = req_capsule_client_get(&req->rq_pill,
308 &RMF_OST_LADVISE_HDR);
309 memcpy(req_ladvise_hdr, ladvise_hdr, sizeof(*ladvise_hdr));
311 req_ladvise = req_capsule_client_get(&req->rq_pill, &RMF_OST_LADVISE);
312 memcpy(req_ladvise, ladvise, sizeof(*ladvise) * num_advise);
313 ptlrpc_request_set_replen(req);
316 /* Do not wait for response. */
317 ptlrpcd_add_req(req);
321 req->rq_interpret_reply = osc_ladvise_interpret;
322 CLASSERT(sizeof(*la) <= sizeof(req->rq_async_args));
323 la = ptlrpc_req_async_args(req);
325 la->la_upcall = upcall;
326 la->la_cookie = cookie;
328 if (rqset == PTLRPCD_SET)
329 ptlrpcd_add_req(req);
331 ptlrpc_set_add_req(rqset, req);
336 static int osc_create(const struct lu_env *env, struct obd_export *exp,
339 struct ptlrpc_request *req;
340 struct ost_body *body;
345 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
346 LASSERT(fid_seq_is_echo(ostid_seq(&oa->o_oi)));
348 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
350 GOTO(out, rc = -ENOMEM);
352 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
354 ptlrpc_request_free(req);
358 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
361 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
363 ptlrpc_request_set_replen(req);
365 rc = ptlrpc_queue_wait(req);
369 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
371 GOTO(out_req, rc = -EPROTO);
373 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
374 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
376 oa->o_blksize = cli_brw_size(exp->exp_obd);
377 oa->o_valid |= OBD_MD_FLBLKSZ;
379 CDEBUG(D_HA, "transno: %lld\n",
380 lustre_msg_get_transno(req->rq_repmsg));
382 ptlrpc_req_finished(req);
387 int osc_punch_send(struct obd_export *exp, struct obdo *oa,
388 obd_enqueue_update_f upcall, void *cookie)
390 struct ptlrpc_request *req;
391 struct osc_setattr_args *sa;
392 struct obd_import *imp = class_exp2cliimp(exp);
393 struct ost_body *body;
398 req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
402 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
404 ptlrpc_request_free(req);
408 osc_set_io_portal(req);
410 ptlrpc_at_set_req_timeout(req);
412 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
414 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
416 ptlrpc_request_set_replen(req);
418 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
419 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
420 sa = ptlrpc_req_async_args(req);
422 sa->sa_upcall = upcall;
423 sa->sa_cookie = cookie;
425 ptlrpcd_add_req(req);
429 EXPORT_SYMBOL(osc_punch_send);
431 static int osc_sync_interpret(const struct lu_env *env,
432 struct ptlrpc_request *req,
435 struct osc_fsync_args *fa = arg;
436 struct ost_body *body;
437 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
438 unsigned long valid = 0;
439 struct cl_object *obj;
445 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
447 CERROR("can't unpack ost_body\n");
448 GOTO(out, rc = -EPROTO);
451 *fa->fa_oa = body->oa;
452 obj = osc2cl(fa->fa_obj);
454 /* Update osc object's blocks attribute */
455 cl_object_attr_lock(obj);
456 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
457 attr->cat_blocks = body->oa.o_blocks;
462 cl_object_attr_update(env, obj, attr, valid);
463 cl_object_attr_unlock(obj);
466 rc = fa->fa_upcall(fa->fa_cookie, rc);
470 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
471 obd_enqueue_update_f upcall, void *cookie,
472 struct ptlrpc_request_set *rqset)
474 struct obd_export *exp = osc_export(obj);
475 struct ptlrpc_request *req;
476 struct ost_body *body;
477 struct osc_fsync_args *fa;
481 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
485 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
487 ptlrpc_request_free(req);
491 /* overload the size and blocks fields in the oa with start/end */
492 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
494 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
496 ptlrpc_request_set_replen(req);
497 req->rq_interpret_reply = osc_sync_interpret;
499 CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
500 fa = ptlrpc_req_async_args(req);
503 fa->fa_upcall = upcall;
504 fa->fa_cookie = cookie;
506 if (rqset == PTLRPCD_SET)
507 ptlrpcd_add_req(req);
509 ptlrpc_set_add_req(rqset, req);
514 /* Find and cancel locally locks matched by @mode in the resource found by
515 * @objid. Found locks are added into @cancel list. Returns the amount of
516 * locks added to @cancels list. */
517 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
518 struct list_head *cancels,
519 enum ldlm_mode mode, __u64 lock_flags)
521 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
522 struct ldlm_res_id res_id;
523 struct ldlm_resource *res;
527 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
528 * export) but disabled through procfs (flag in NS).
530 * This distinguishes from a case when ELC is not supported originally,
531 * when we still want to cancel locks in advance and just cancel them
532 * locally, without sending any RPC. */
533 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
536 ostid_build_res_name(&oa->o_oi, &res_id);
537 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
541 LDLM_RESOURCE_ADDREF(res);
542 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
543 lock_flags, 0, NULL);
544 LDLM_RESOURCE_DELREF(res);
545 ldlm_resource_putref(res);
549 static int osc_destroy_interpret(const struct lu_env *env,
550 struct ptlrpc_request *req, void *data,
553 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
555 atomic_dec(&cli->cl_destroy_in_flight);
556 wake_up(&cli->cl_destroy_waitq);
560 static int osc_can_send_destroy(struct client_obd *cli)
562 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
563 cli->cl_max_rpcs_in_flight) {
564 /* The destroy request can be sent */
567 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
568 cli->cl_max_rpcs_in_flight) {
570 * The counter has been modified between the two atomic
573 wake_up(&cli->cl_destroy_waitq);
578 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
581 struct client_obd *cli = &exp->exp_obd->u.cli;
582 struct ptlrpc_request *req;
583 struct ost_body *body;
584 struct list_head cancels = LIST_HEAD_INIT(cancels);
589 CDEBUG(D_INFO, "oa NULL\n");
593 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
594 LDLM_FL_DISCARD_DATA);
596 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
598 ldlm_lock_list_put(&cancels, l_bl_ast, count);
602 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
605 ptlrpc_request_free(req);
609 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
610 ptlrpc_at_set_req_timeout(req);
612 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
614 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
616 ptlrpc_request_set_replen(req);
618 req->rq_interpret_reply = osc_destroy_interpret;
619 if (!osc_can_send_destroy(cli)) {
620 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
623 * Wait until the number of on-going destroy RPCs drops
624 * under max_rpc_in_flight
626 rc = l_wait_event_exclusive(cli->cl_destroy_waitq,
627 osc_can_send_destroy(cli), &lwi);
629 ptlrpc_req_finished(req);
634 /* Do not wait for response */
635 ptlrpcd_add_req(req);
639 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
642 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
644 LASSERT(!(oa->o_valid & bits));
647 spin_lock(&cli->cl_loi_list_lock);
648 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data, GRANT_PARAM))
649 oa->o_dirty = cli->cl_dirty_grant;
651 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
652 if (unlikely(cli->cl_dirty_pages - cli->cl_dirty_transit >
653 cli->cl_dirty_max_pages)) {
654 CERROR("dirty %lu - %lu > dirty_max %lu\n",
655 cli->cl_dirty_pages, cli->cl_dirty_transit,
656 cli->cl_dirty_max_pages);
658 } else if (unlikely(atomic_long_read(&obd_dirty_pages) -
659 atomic_long_read(&obd_dirty_transit_pages) >
660 (long)(obd_max_dirty_pages + 1))) {
661 /* The atomic_read() allowing the atomic_inc() are
662 * not covered by a lock thus they may safely race and trip
663 * this CERROR() unless we add in a small fudge factor (+1). */
664 CERROR("%s: dirty %ld - %ld > system dirty_max %ld\n",
665 cli_name(cli), atomic_long_read(&obd_dirty_pages),
666 atomic_long_read(&obd_dirty_transit_pages),
667 obd_max_dirty_pages);
669 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
671 CERROR("dirty %lu - dirty_max %lu too big???\n",
672 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
675 unsigned long nrpages;
677 nrpages = cli->cl_max_pages_per_rpc;
678 nrpages *= cli->cl_max_rpcs_in_flight + 1;
679 nrpages = max(nrpages, cli->cl_dirty_max_pages);
680 oa->o_undirty = nrpages << PAGE_SHIFT;
681 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data,
685 /* take extent tax into account when asking for more
687 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
688 cli->cl_max_extent_pages;
689 oa->o_undirty += nrextents * cli->cl_grant_extent_tax;
692 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
693 oa->o_dropped = cli->cl_lost_grant;
694 cli->cl_lost_grant = 0;
695 spin_unlock(&cli->cl_loi_list_lock);
696 CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
697 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
700 void osc_update_next_shrink(struct client_obd *cli)
702 cli->cl_next_shrink_grant = ktime_get_seconds() +
703 cli->cl_grant_shrink_interval;
705 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
706 cli->cl_next_shrink_grant);
709 static void __osc_update_grant(struct client_obd *cli, u64 grant)
711 spin_lock(&cli->cl_loi_list_lock);
712 cli->cl_avail_grant += grant;
713 spin_unlock(&cli->cl_loi_list_lock);
716 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
718 if (body->oa.o_valid & OBD_MD_FLGRANT) {
719 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
720 __osc_update_grant(cli, body->oa.o_grant);
724 static int osc_shrink_grant_interpret(const struct lu_env *env,
725 struct ptlrpc_request *req,
728 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
729 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
730 struct ost_body *body;
733 __osc_update_grant(cli, oa->o_grant);
737 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
739 osc_update_grant(cli, body);
745 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
747 spin_lock(&cli->cl_loi_list_lock);
748 oa->o_grant = cli->cl_avail_grant / 4;
749 cli->cl_avail_grant -= oa->o_grant;
750 spin_unlock(&cli->cl_loi_list_lock);
751 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
752 oa->o_valid |= OBD_MD_FLFLAGS;
755 oa->o_flags |= OBD_FL_SHRINK_GRANT;
756 osc_update_next_shrink(cli);
759 /* Shrink the current grant, either from some large amount to enough for a
760 * full set of in-flight RPCs, or if we have already shrunk to that limit
761 * then to enough for a single RPC. This avoids keeping more grant than
762 * needed, and avoids shrinking the grant piecemeal. */
763 static int osc_shrink_grant(struct client_obd *cli)
765 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
766 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
768 spin_lock(&cli->cl_loi_list_lock);
769 if (cli->cl_avail_grant <= target_bytes)
770 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
771 spin_unlock(&cli->cl_loi_list_lock);
773 return osc_shrink_grant_to_target(cli, target_bytes);
776 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
779 struct ost_body *body;
782 spin_lock(&cli->cl_loi_list_lock);
783 /* Don't shrink if we are already above or below the desired limit
784 * We don't want to shrink below a single RPC, as that will negatively
785 * impact block allocation and long-term performance. */
786 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
787 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
789 if (target_bytes >= cli->cl_avail_grant) {
790 spin_unlock(&cli->cl_loi_list_lock);
793 spin_unlock(&cli->cl_loi_list_lock);
799 osc_announce_cached(cli, &body->oa, 0);
801 spin_lock(&cli->cl_loi_list_lock);
802 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
803 cli->cl_avail_grant = target_bytes;
804 spin_unlock(&cli->cl_loi_list_lock);
805 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
806 body->oa.o_valid |= OBD_MD_FLFLAGS;
807 body->oa.o_flags = 0;
809 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
810 osc_update_next_shrink(cli);
812 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
813 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
814 sizeof(*body), body, NULL);
816 __osc_update_grant(cli, body->oa.o_grant);
821 static int osc_should_shrink_grant(struct client_obd *client)
823 time64_t next_shrink = client->cl_next_shrink_grant;
825 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
826 OBD_CONNECT_GRANT_SHRINK) == 0)
829 if (ktime_get_seconds() >= next_shrink - 5) {
830 /* Get the current RPC size directly, instead of going via:
831 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
832 * Keep comment here so that it can be found by searching. */
833 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
835 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
836 client->cl_avail_grant > brw_size)
839 osc_update_next_shrink(client);
844 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
846 struct client_obd *client;
848 list_for_each_entry(client, &item->ti_obd_list, cl_grant_shrink_list) {
849 if (osc_should_shrink_grant(client))
850 osc_shrink_grant(client);
855 static int osc_add_shrink_grant(struct client_obd *client)
859 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
861 osc_grant_shrink_grant_cb, NULL,
862 &client->cl_grant_shrink_list);
864 CERROR("add grant client %s error %d\n", cli_name(client), rc);
867 CDEBUG(D_CACHE, "add grant client %s\n", cli_name(client));
868 osc_update_next_shrink(client);
872 static int osc_del_shrink_grant(struct client_obd *client)
874 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
878 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
881 * ocd_grant is the total grant amount we're expect to hold: if we've
882 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
883 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
886 * race is tolerable here: if we're evicted, but imp_state already
887 * left EVICTED state, then cl_dirty_pages must be 0 already.
889 spin_lock(&cli->cl_loi_list_lock);
890 cli->cl_avail_grant = ocd->ocd_grant;
891 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
892 cli->cl_avail_grant -= cli->cl_reserved_grant;
893 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
894 cli->cl_avail_grant -= cli->cl_dirty_grant;
896 cli->cl_avail_grant -=
897 cli->cl_dirty_pages << PAGE_SHIFT;
900 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
904 /* overhead for each extent insertion */
905 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
906 /* determine the appropriate chunk size used by osc_extent. */
907 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
908 ocd->ocd_grant_blkbits);
909 /* max_pages_per_rpc must be chunk aligned */
910 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
911 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
912 ~chunk_mask) & chunk_mask;
913 /* determine maximum extent size, in #pages */
914 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
915 cli->cl_max_extent_pages = size >> PAGE_SHIFT;
916 if (cli->cl_max_extent_pages == 0)
917 cli->cl_max_extent_pages = 1;
919 cli->cl_grant_extent_tax = 0;
920 cli->cl_chunkbits = PAGE_SHIFT;
921 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
923 spin_unlock(&cli->cl_loi_list_lock);
925 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
926 "chunk bits: %d cl_max_extent_pages: %d\n",
928 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
929 cli->cl_max_extent_pages);
931 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
932 list_empty(&cli->cl_grant_shrink_list))
933 osc_add_shrink_grant(cli);
935 EXPORT_SYMBOL(osc_init_grant);
937 /* We assume that the reason this OSC got a short read is because it read
938 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
939 * via the LOV, and it _knows_ it's reading inside the file, it's just that
940 * this stripe never got written at or beyond this stripe offset yet. */
941 static void handle_short_read(int nob_read, size_t page_count,
942 struct brw_page **pga)
947 /* skip bytes read OK */
948 while (nob_read > 0) {
949 LASSERT (page_count > 0);
951 if (pga[i]->count > nob_read) {
952 /* EOF inside this page */
953 ptr = kmap(pga[i]->pg) +
954 (pga[i]->off & ~PAGE_MASK);
955 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
962 nob_read -= pga[i]->count;
967 /* zero remaining pages */
968 while (page_count-- > 0) {
969 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
970 memset(ptr, 0, pga[i]->count);
976 static int check_write_rcs(struct ptlrpc_request *req,
977 int requested_nob, int niocount,
978 size_t page_count, struct brw_page **pga)
983 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
984 sizeof(*remote_rcs) *
986 if (remote_rcs == NULL) {
987 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
991 /* return error if any niobuf was in error */
992 for (i = 0; i < niocount; i++) {
993 if ((int)remote_rcs[i] < 0)
994 return(remote_rcs[i]);
996 if (remote_rcs[i] != 0) {
997 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
998 i, remote_rcs[i], req);
1002 if (req->rq_bulk != NULL &&
1003 req->rq_bulk->bd_nob_transferred != requested_nob) {
1004 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1005 req->rq_bulk->bd_nob_transferred, requested_nob);
1012 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1014 if (p1->flag != p2->flag) {
1015 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1016 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1017 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1019 /* warn if we try to combine flags that we don't know to be
1020 * safe to combine */
1021 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1022 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1023 "report this at https://jira.hpdd.intel.com/\n",
1024 p1->flag, p2->flag);
1029 return (p1->off + p1->count == p2->off);
1032 static u32 osc_checksum_bulk(int nob, size_t pg_count,
1033 struct brw_page **pga, int opc,
1034 enum cksum_types cksum_type)
1038 struct cfs_crypto_hash_desc *hdesc;
1039 unsigned int bufsize;
1040 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1042 LASSERT(pg_count > 0);
1044 hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1045 if (IS_ERR(hdesc)) {
1046 CERROR("Unable to initialize checksum hash %s\n",
1047 cfs_crypto_hash_name(cfs_alg));
1048 return PTR_ERR(hdesc);
1051 while (nob > 0 && pg_count > 0) {
1052 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1054 /* corrupt the data before we compute the checksum, to
1055 * simulate an OST->client data error */
1056 if (i == 0 && opc == OST_READ &&
1057 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1058 unsigned char *ptr = kmap(pga[i]->pg);
1059 int off = pga[i]->off & ~PAGE_MASK;
1061 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1064 cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
1065 pga[i]->off & ~PAGE_MASK,
1067 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1068 (int)(pga[i]->off & ~PAGE_MASK));
1070 nob -= pga[i]->count;
1075 bufsize = sizeof(cksum);
1076 cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
1078 /* For sending we only compute the wrong checksum instead
1079 * of corrupting the data so it is still correct on a redo */
1080 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1087 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1088 u32 page_count, struct brw_page **pga,
1089 struct ptlrpc_request **reqp, int resend)
1091 struct ptlrpc_request *req;
1092 struct ptlrpc_bulk_desc *desc;
1093 struct ost_body *body;
1094 struct obd_ioobj *ioobj;
1095 struct niobuf_remote *niobuf;
1096 int niocount, i, requested_nob, opc, rc, short_io_size;
1097 struct osc_brw_async_args *aa;
1098 struct req_capsule *pill;
1099 struct brw_page *pg_prev;
1103 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1104 RETURN(-ENOMEM); /* Recoverable */
1105 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1106 RETURN(-EINVAL); /* Fatal */
1108 if ((cmd & OBD_BRW_WRITE) != 0) {
1110 req = ptlrpc_request_alloc_pool(cli->cl_import,
1112 &RQF_OST_BRW_WRITE);
1115 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1120 for (niocount = i = 1; i < page_count; i++) {
1121 if (!can_merge_pages(pga[i - 1], pga[i]))
1125 pill = &req->rq_pill;
1126 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1128 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1129 niocount * sizeof(*niobuf));
1131 for (i = 0; i < page_count; i++)
1132 short_io_size += pga[i]->count;
1134 /* Check if we can do a short io. */
1135 if (!(short_io_size <= cli->cl_short_io_bytes && niocount == 1 &&
1136 imp_connect_shortio(cli->cl_import)))
1139 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1140 opc == OST_READ ? 0 : short_io_size);
1141 if (opc == OST_READ)
1142 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1145 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1147 ptlrpc_request_free(req);
1150 osc_set_io_portal(req);
1152 ptlrpc_at_set_req_timeout(req);
1153 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1155 req->rq_no_retry_einprogress = 1;
1157 if (short_io_size != 0) {
1159 short_io_buf = NULL;
1163 desc = ptlrpc_prep_bulk_imp(req, page_count,
1164 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1165 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1166 PTLRPC_BULK_PUT_SINK) |
1167 PTLRPC_BULK_BUF_KIOV,
1169 &ptlrpc_bulk_kiov_pin_ops);
1172 GOTO(out, rc = -ENOMEM);
1173 /* NB request now owns desc and will free it when it gets freed */
1175 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1176 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1177 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1178 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1180 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1182 obdo_to_ioobj(oa, ioobj);
1183 ioobj->ioo_bufcnt = niocount;
1184 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1185 * that might be send for this request. The actual number is decided
1186 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1187 * "max - 1" for old client compatibility sending "0", and also so the
1188 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1190 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1192 ioobj_max_brw_set(ioobj, 0);
1194 if (short_io_size != 0) {
1195 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1196 body->oa.o_valid |= OBD_MD_FLFLAGS;
1197 body->oa.o_flags = 0;
1199 body->oa.o_flags |= OBD_FL_SHORT_IO;
1200 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1202 if (opc == OST_WRITE) {
1203 short_io_buf = req_capsule_client_get(pill,
1205 LASSERT(short_io_buf != NULL);
1209 LASSERT(page_count > 0);
1211 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1212 struct brw_page *pg = pga[i];
1213 int poff = pg->off & ~PAGE_MASK;
1215 LASSERT(pg->count > 0);
1216 /* make sure there is no gap in the middle of page array */
1217 LASSERTF(page_count == 1 ||
1218 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1219 ergo(i > 0 && i < page_count - 1,
1220 poff == 0 && pg->count == PAGE_SIZE) &&
1221 ergo(i == page_count - 1, poff == 0)),
1222 "i: %d/%d pg: %p off: %llu, count: %u\n",
1223 i, page_count, pg, pg->off, pg->count);
1224 LASSERTF(i == 0 || pg->off > pg_prev->off,
1225 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1226 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1228 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1229 pg_prev->pg, page_private(pg_prev->pg),
1230 pg_prev->pg->index, pg_prev->off);
1231 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1232 (pg->flag & OBD_BRW_SRVLOCK));
1233 if (short_io_size != 0 && opc == OST_WRITE) {
1234 unsigned char *ptr = ll_kmap_atomic(pg->pg, KM_USER0);
1236 LASSERT(short_io_size >= requested_nob + pg->count);
1237 memcpy(short_io_buf + requested_nob,
1240 ll_kunmap_atomic(ptr, KM_USER0);
1241 } else if (short_io_size == 0) {
1242 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1245 requested_nob += pg->count;
1247 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1249 niobuf->rnb_len += pg->count;
1251 niobuf->rnb_offset = pg->off;
1252 niobuf->rnb_len = pg->count;
1253 niobuf->rnb_flags = pg->flag;
1258 LASSERTF((void *)(niobuf - niocount) ==
1259 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1260 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1261 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1263 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1265 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1266 body->oa.o_valid |= OBD_MD_FLFLAGS;
1267 body->oa.o_flags = 0;
1269 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1272 if (osc_should_shrink_grant(cli))
1273 osc_shrink_grant_local(cli, &body->oa);
1275 /* size[REQ_REC_OFF] still sizeof (*body) */
1276 if (opc == OST_WRITE) {
1277 if (cli->cl_checksum &&
1278 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1279 /* store cl_cksum_type in a local variable since
1280 * it can be changed via lprocfs */
1281 enum cksum_types cksum_type = cli->cl_cksum_type;
1283 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1284 body->oa.o_flags = 0;
1286 body->oa.o_flags |= cksum_type_pack(cksum_type);
1287 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1288 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1292 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1294 /* save this in 'oa', too, for later checking */
1295 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1296 oa->o_flags |= cksum_type_pack(cksum_type);
1298 /* clear out the checksum flag, in case this is a
1299 * resend but cl_checksum is no longer set. b=11238 */
1300 oa->o_valid &= ~OBD_MD_FLCKSUM;
1302 oa->o_cksum = body->oa.o_cksum;
1303 /* 1 RC per niobuf */
1304 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1305 sizeof(__u32) * niocount);
1307 if (cli->cl_checksum &&
1308 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1309 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1310 body->oa.o_flags = 0;
1311 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1312 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1315 /* Client cksum has been already copied to wire obdo in previous
1316 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1317 * resent due to cksum error, this will allow Server to
1318 * check+dump pages on its side */
1320 ptlrpc_request_set_replen(req);
1322 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1323 aa = ptlrpc_req_async_args(req);
1325 aa->aa_requested_nob = requested_nob;
1326 aa->aa_nio_count = niocount;
1327 aa->aa_page_count = page_count;
1331 INIT_LIST_HEAD(&aa->aa_oaps);
1334 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1335 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1336 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1337 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1341 ptlrpc_req_finished(req);
1345 char dbgcksum_file_name[PATH_MAX];
1347 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1348 struct brw_page **pga, __u32 server_cksum,
1357 /* will only keep dump of pages on first error for the same range in
1358 * file/fid, not during the resends/retries. */
1359 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1360 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1361 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1362 libcfs_debug_file_path_arr :
1363 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1364 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1365 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1366 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1368 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1369 client_cksum, server_cksum);
1370 filp = filp_open(dbgcksum_file_name,
1371 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1375 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1376 "checksum error: rc = %d\n", dbgcksum_file_name,
1379 CERROR("%s: can't open to dump pages with checksum "
1380 "error: rc = %d\n", dbgcksum_file_name, rc);
1386 for (i = 0; i < page_count; i++) {
1387 len = pga[i]->count;
1388 buf = kmap(pga[i]->pg);
1390 rc = vfs_write(filp, (__force const char __user *)buf,
1393 CERROR("%s: wanted to write %u but got %d "
1394 "error\n", dbgcksum_file_name, len, rc);
1399 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1400 dbgcksum_file_name, rc);
1406 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1408 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1409 filp_close(filp, NULL);
1414 check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1415 __u32 client_cksum, __u32 server_cksum,
1416 struct osc_brw_async_args *aa)
1420 enum cksum_types cksum_type;
1422 if (server_cksum == client_cksum) {
1423 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1427 if (aa->aa_cli->cl_checksum_dump)
1428 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1429 server_cksum, client_cksum);
1431 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1433 new_cksum = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1434 aa->aa_ppga, OST_WRITE, cksum_type);
1436 if (cksum_type != cksum_type_unpack(aa->aa_oa->o_flags))
1437 msg = "the server did not use the checksum type specified in "
1438 "the original request - likely a protocol problem";
1439 else if (new_cksum == server_cksum)
1440 msg = "changed on the client after we checksummed it - "
1441 "likely false positive due to mmap IO (bug 11742)";
1442 else if (new_cksum == client_cksum)
1443 msg = "changed in transit before arrival at OST";
1445 msg = "changed in transit AND doesn't match the original - "
1446 "likely false positive due to mmap IO (bug 11742)";
1448 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1449 DFID " object "DOSTID" extent [%llu-%llu], original "
1450 "client csum %x (type %x), server csum %x (type %x),"
1451 " client csum now %x\n",
1452 aa->aa_cli->cl_import->imp_obd->obd_name,
1453 msg, libcfs_nid2str(peer->nid),
1454 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1455 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1456 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1457 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1458 aa->aa_ppga[aa->aa_page_count - 1]->off +
1459 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1460 client_cksum, cksum_type_unpack(aa->aa_oa->o_flags),
1461 server_cksum, cksum_type, new_cksum);
1465 /* Note rc enters this function as number of bytes transferred */
1466 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1468 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1469 const struct lnet_process_id *peer =
1470 &req->rq_import->imp_connection->c_peer;
1471 struct client_obd *cli = aa->aa_cli;
1472 struct ost_body *body;
1473 u32 client_cksum = 0;
1476 if (rc < 0 && rc != -EDQUOT) {
1477 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1481 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1482 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1484 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1488 /* set/clear over quota flag for a uid/gid/projid */
1489 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1490 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1491 unsigned qid[LL_MAXQUOTAS] = {
1492 body->oa.o_uid, body->oa.o_gid,
1493 body->oa.o_projid };
1494 CDEBUG(D_QUOTA, "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1495 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1496 body->oa.o_valid, body->oa.o_flags);
1497 osc_quota_setdq(cli, qid, body->oa.o_valid,
1501 osc_update_grant(cli, body);
1506 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1507 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1509 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1511 CERROR("Unexpected +ve rc %d\n", rc);
1515 if (req->rq_bulk != NULL &&
1516 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1519 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1520 check_write_checksum(&body->oa, peer, client_cksum,
1521 body->oa.o_cksum, aa))
1524 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1525 aa->aa_page_count, aa->aa_ppga);
1529 /* The rest of this function executes only for OST_READs */
1531 if (req->rq_bulk == NULL) {
1532 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1534 LASSERT(rc == req->rq_status);
1536 /* if unwrap_bulk failed, return -EAGAIN to retry */
1537 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1540 GOTO(out, rc = -EAGAIN);
1542 if (rc > aa->aa_requested_nob) {
1543 CERROR("Unexpected rc %d (%d requested)\n", rc,
1544 aa->aa_requested_nob);
1548 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1549 CERROR ("Unexpected rc %d (%d transferred)\n",
1550 rc, req->rq_bulk->bd_nob_transferred);
1554 if (req->rq_bulk == NULL) {
1556 int nob, pg_count, i = 0;
1559 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1560 pg_count = aa->aa_page_count;
1561 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1564 while (nob > 0 && pg_count > 0) {
1566 int count = aa->aa_ppga[i]->count > nob ?
1567 nob : aa->aa_ppga[i]->count;
1569 CDEBUG(D_CACHE, "page %p count %d\n",
1570 aa->aa_ppga[i]->pg, count);
1571 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1572 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1574 ll_kunmap_atomic((void *) ptr, KM_USER0);
1583 if (rc < aa->aa_requested_nob)
1584 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1586 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1587 static int cksum_counter;
1588 u32 server_cksum = body->oa.o_cksum;
1591 enum cksum_types cksum_type;
1593 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1594 body->oa.o_flags : 0);
1595 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1596 aa->aa_ppga, OST_READ,
1599 if (req->rq_bulk != NULL &&
1600 peer->nid != req->rq_bulk->bd_sender) {
1602 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1605 if (server_cksum != client_cksum) {
1606 struct ost_body *clbody;
1607 u32 page_count = aa->aa_page_count;
1609 clbody = req_capsule_client_get(&req->rq_pill,
1611 if (cli->cl_checksum_dump)
1612 dump_all_bulk_pages(&clbody->oa, page_count,
1613 aa->aa_ppga, server_cksum,
1616 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1617 "%s%s%s inode "DFID" object "DOSTID
1618 " extent [%llu-%llu], client %x, "
1619 "server %x, cksum_type %x\n",
1620 req->rq_import->imp_obd->obd_name,
1621 libcfs_nid2str(peer->nid),
1623 clbody->oa.o_valid & OBD_MD_FLFID ?
1624 clbody->oa.o_parent_seq : 0ULL,
1625 clbody->oa.o_valid & OBD_MD_FLFID ?
1626 clbody->oa.o_parent_oid : 0,
1627 clbody->oa.o_valid & OBD_MD_FLFID ?
1628 clbody->oa.o_parent_ver : 0,
1629 POSTID(&body->oa.o_oi),
1630 aa->aa_ppga[0]->off,
1631 aa->aa_ppga[page_count-1]->off +
1632 aa->aa_ppga[page_count-1]->count - 1,
1633 client_cksum, server_cksum,
1636 aa->aa_oa->o_cksum = client_cksum;
1640 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1643 } else if (unlikely(client_cksum)) {
1644 static int cksum_missed;
1647 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1648 CERROR("Checksum %u requested from %s but not sent\n",
1649 cksum_missed, libcfs_nid2str(peer->nid));
1655 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1656 aa->aa_oa, &body->oa);
1661 static int osc_brw_redo_request(struct ptlrpc_request *request,
1662 struct osc_brw_async_args *aa, int rc)
1664 struct ptlrpc_request *new_req;
1665 struct osc_brw_async_args *new_aa;
1666 struct osc_async_page *oap;
1669 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1670 "redo for recoverable error %d", rc);
1672 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1673 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1674 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1675 aa->aa_ppga, &new_req, 1);
1679 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1680 if (oap->oap_request != NULL) {
1681 LASSERTF(request == oap->oap_request,
1682 "request %p != oap_request %p\n",
1683 request, oap->oap_request);
1684 if (oap->oap_interrupted) {
1685 ptlrpc_req_finished(new_req);
1690 /* New request takes over pga and oaps from old request.
1691 * Note that copying a list_head doesn't work, need to move it... */
1693 new_req->rq_interpret_reply = request->rq_interpret_reply;
1694 new_req->rq_async_args = request->rq_async_args;
1695 new_req->rq_commit_cb = request->rq_commit_cb;
1696 /* cap resend delay to the current request timeout, this is similar to
1697 * what ptlrpc does (see after_reply()) */
1698 if (aa->aa_resends > new_req->rq_timeout)
1699 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1701 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1702 new_req->rq_generation_set = 1;
1703 new_req->rq_import_generation = request->rq_import_generation;
1705 new_aa = ptlrpc_req_async_args(new_req);
1707 INIT_LIST_HEAD(&new_aa->aa_oaps);
1708 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1709 INIT_LIST_HEAD(&new_aa->aa_exts);
1710 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1711 new_aa->aa_resends = aa->aa_resends;
1713 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1714 if (oap->oap_request) {
1715 ptlrpc_req_finished(oap->oap_request);
1716 oap->oap_request = ptlrpc_request_addref(new_req);
1720 /* XXX: This code will run into problem if we're going to support
1721 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1722 * and wait for all of them to be finished. We should inherit request
1723 * set from old request. */
1724 ptlrpcd_add_req(new_req);
1726 DEBUG_REQ(D_INFO, new_req, "new request");
1731 * ugh, we want disk allocation on the target to happen in offset order. we'll
1732 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1733 * fine for our small page arrays and doesn't require allocation. its an
1734 * insertion sort that swaps elements that are strides apart, shrinking the
1735 * stride down until its '1' and the array is sorted.
1737 static void sort_brw_pages(struct brw_page **array, int num)
1740 struct brw_page *tmp;
1744 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1749 for (i = stride ; i < num ; i++) {
1752 while (j >= stride && array[j - stride]->off > tmp->off) {
1753 array[j] = array[j - stride];
1758 } while (stride > 1);
1761 static void osc_release_ppga(struct brw_page **ppga, size_t count)
1763 LASSERT(ppga != NULL);
1764 OBD_FREE(ppga, sizeof(*ppga) * count);
1767 static int brw_interpret(const struct lu_env *env,
1768 struct ptlrpc_request *req, void *data, int rc)
1770 struct osc_brw_async_args *aa = data;
1771 struct osc_extent *ext;
1772 struct osc_extent *tmp;
1773 struct client_obd *cli = aa->aa_cli;
1774 unsigned long transferred = 0;
1777 rc = osc_brw_fini_request(req, rc);
1778 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1779 /* When server return -EINPROGRESS, client should always retry
1780 * regardless of the number of times the bulk was resent already. */
1781 if (osc_recoverable_error(rc)) {
1782 if (req->rq_import_generation !=
1783 req->rq_import->imp_generation) {
1784 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1785 ""DOSTID", rc = %d.\n",
1786 req->rq_import->imp_obd->obd_name,
1787 POSTID(&aa->aa_oa->o_oi), rc);
1788 } else if (rc == -EINPROGRESS ||
1789 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1790 rc = osc_brw_redo_request(req, aa, rc);
1792 CERROR("%s: too many resent retries for object: "
1793 "%llu:%llu, rc = %d.\n",
1794 req->rq_import->imp_obd->obd_name,
1795 POSTID(&aa->aa_oa->o_oi), rc);
1800 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1805 struct obdo *oa = aa->aa_oa;
1806 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1807 unsigned long valid = 0;
1808 struct cl_object *obj;
1809 struct osc_async_page *last;
1811 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
1812 obj = osc2cl(last->oap_obj);
1814 cl_object_attr_lock(obj);
1815 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1816 attr->cat_blocks = oa->o_blocks;
1817 valid |= CAT_BLOCKS;
1819 if (oa->o_valid & OBD_MD_FLMTIME) {
1820 attr->cat_mtime = oa->o_mtime;
1823 if (oa->o_valid & OBD_MD_FLATIME) {
1824 attr->cat_atime = oa->o_atime;
1827 if (oa->o_valid & OBD_MD_FLCTIME) {
1828 attr->cat_ctime = oa->o_ctime;
1832 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1833 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
1834 loff_t last_off = last->oap_count + last->oap_obj_off +
1837 /* Change file size if this is an out of quota or
1838 * direct IO write and it extends the file size */
1839 if (loi->loi_lvb.lvb_size < last_off) {
1840 attr->cat_size = last_off;
1843 /* Extend KMS if it's not a lockless write */
1844 if (loi->loi_kms < last_off &&
1845 oap2osc_page(last)->ops_srvlock == 0) {
1846 attr->cat_kms = last_off;
1852 cl_object_attr_update(env, obj, attr, valid);
1853 cl_object_attr_unlock(obj);
1855 OBDO_FREE(aa->aa_oa);
1857 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
1858 osc_inc_unstable_pages(req);
1860 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1861 list_del_init(&ext->oe_link);
1862 osc_extent_finish(env, ext, 1, rc);
1864 LASSERT(list_empty(&aa->aa_exts));
1865 LASSERT(list_empty(&aa->aa_oaps));
1867 transferred = (req->rq_bulk == NULL ? /* short io */
1868 aa->aa_requested_nob :
1869 req->rq_bulk->bd_nob_transferred);
1871 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1872 ptlrpc_lprocfs_brw(req, transferred);
1874 spin_lock(&cli->cl_loi_list_lock);
1875 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1876 * is called so we know whether to go to sync BRWs or wait for more
1877 * RPCs to complete */
1878 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1879 cli->cl_w_in_flight--;
1881 cli->cl_r_in_flight--;
1882 osc_wake_cache_waiters(cli);
1883 spin_unlock(&cli->cl_loi_list_lock);
1885 osc_io_unplug(env, cli, NULL);
1889 static void brw_commit(struct ptlrpc_request *req)
1891 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
1892 * this called via the rq_commit_cb, I need to ensure
1893 * osc_dec_unstable_pages is still called. Otherwise unstable
1894 * pages may be leaked. */
1895 spin_lock(&req->rq_lock);
1896 if (likely(req->rq_unstable)) {
1897 req->rq_unstable = 0;
1898 spin_unlock(&req->rq_lock);
1900 osc_dec_unstable_pages(req);
1902 req->rq_committed = 1;
1903 spin_unlock(&req->rq_lock);
1908 * Build an RPC by the list of extent @ext_list. The caller must ensure
1909 * that the total pages in this list are NOT over max pages per RPC.
1910 * Extents in the list must be in OES_RPC state.
1912 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
1913 struct list_head *ext_list, int cmd)
1915 struct ptlrpc_request *req = NULL;
1916 struct osc_extent *ext;
1917 struct brw_page **pga = NULL;
1918 struct osc_brw_async_args *aa = NULL;
1919 struct obdo *oa = NULL;
1920 struct osc_async_page *oap;
1921 struct osc_object *obj = NULL;
1922 struct cl_req_attr *crattr = NULL;
1923 loff_t starting_offset = OBD_OBJECT_EOF;
1924 loff_t ending_offset = 0;
1928 bool soft_sync = false;
1929 bool interrupted = false;
1933 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1934 struct ost_body *body;
1936 LASSERT(!list_empty(ext_list));
1938 /* add pages into rpc_list to build BRW rpc */
1939 list_for_each_entry(ext, ext_list, oe_link) {
1940 LASSERT(ext->oe_state == OES_RPC);
1941 mem_tight |= ext->oe_memalloc;
1942 grant += ext->oe_grants;
1943 page_count += ext->oe_nr_pages;
1948 soft_sync = osc_over_unstable_soft_limit(cli);
1950 mpflag = cfs_memory_pressure_get_and_set();
1952 OBD_ALLOC(pga, sizeof(*pga) * page_count);
1954 GOTO(out, rc = -ENOMEM);
1958 GOTO(out, rc = -ENOMEM);
1961 list_for_each_entry(ext, ext_list, oe_link) {
1962 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
1964 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
1966 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
1967 pga[i] = &oap->oap_brw_page;
1968 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
1971 list_add_tail(&oap->oap_rpc_item, &rpc_list);
1972 if (starting_offset == OBD_OBJECT_EOF ||
1973 starting_offset > oap->oap_obj_off)
1974 starting_offset = oap->oap_obj_off;
1976 LASSERT(oap->oap_page_off == 0);
1977 if (ending_offset < oap->oap_obj_off + oap->oap_count)
1978 ending_offset = oap->oap_obj_off +
1981 LASSERT(oap->oap_page_off + oap->oap_count ==
1983 if (oap->oap_interrupted)
1988 /* first page in the list */
1989 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
1991 crattr = &osc_env_info(env)->oti_req_attr;
1992 memset(crattr, 0, sizeof(*crattr));
1993 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
1994 crattr->cra_flags = ~0ULL;
1995 crattr->cra_page = oap2cl_page(oap);
1996 crattr->cra_oa = oa;
1997 cl_req_attr_set(env, osc2cl(obj), crattr);
1999 if (cmd == OBD_BRW_WRITE)
2000 oa->o_grant_used = grant;
2002 sort_brw_pages(pga, page_count);
2003 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2005 CERROR("prep_req failed: %d\n", rc);
2009 req->rq_commit_cb = brw_commit;
2010 req->rq_interpret_reply = brw_interpret;
2011 req->rq_memalloc = mem_tight != 0;
2012 oap->oap_request = ptlrpc_request_addref(req);
2013 if (interrupted && !req->rq_intr)
2014 ptlrpc_mark_interrupted(req);
2016 /* Need to update the timestamps after the request is built in case
2017 * we race with setattr (locally or in queue at OST). If OST gets
2018 * later setattr before earlier BRW (as determined by the request xid),
2019 * the OST will not use BRW timestamps. Sadly, there is no obvious
2020 * way to do this in a single call. bug 10150 */
2021 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2022 crattr->cra_oa = &body->oa;
2023 crattr->cra_flags = OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME;
2024 cl_req_attr_set(env, osc2cl(obj), crattr);
2025 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2027 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2028 aa = ptlrpc_req_async_args(req);
2029 INIT_LIST_HEAD(&aa->aa_oaps);
2030 list_splice_init(&rpc_list, &aa->aa_oaps);
2031 INIT_LIST_HEAD(&aa->aa_exts);
2032 list_splice_init(ext_list, &aa->aa_exts);
2034 spin_lock(&cli->cl_loi_list_lock);
2035 starting_offset >>= PAGE_SHIFT;
2036 if (cmd == OBD_BRW_READ) {
2037 cli->cl_r_in_flight++;
2038 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2039 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2040 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2041 starting_offset + 1);
2043 cli->cl_w_in_flight++;
2044 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2045 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2046 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2047 starting_offset + 1);
2049 spin_unlock(&cli->cl_loi_list_lock);
2051 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
2052 page_count, aa, cli->cl_r_in_flight,
2053 cli->cl_w_in_flight);
2054 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2056 ptlrpcd_add_req(req);
2062 cfs_memory_pressure_restore(mpflag);
2065 LASSERT(req == NULL);
2070 OBD_FREE(pga, sizeof(*pga) * page_count);
2071 /* this should happen rarely and is pretty bad, it makes the
2072 * pending list not follow the dirty order */
2073 while (!list_empty(ext_list)) {
2074 ext = list_entry(ext_list->next, struct osc_extent,
2076 list_del_init(&ext->oe_link);
2077 osc_extent_finish(env, ext, 0, rc);
2083 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2087 LASSERT(lock != NULL);
2089 lock_res_and_lock(lock);
2091 if (lock->l_ast_data == NULL)
2092 lock->l_ast_data = data;
2093 if (lock->l_ast_data == data)
2096 unlock_res_and_lock(lock);
2101 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2102 void *cookie, struct lustre_handle *lockh,
2103 enum ldlm_mode mode, __u64 *flags, bool speculative,
2106 bool intent = *flags & LDLM_FL_HAS_INTENT;
2110 /* The request was created before ldlm_cli_enqueue call. */
2111 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2112 struct ldlm_reply *rep;
2114 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2115 LASSERT(rep != NULL);
2117 rep->lock_policy_res1 =
2118 ptlrpc_status_ntoh(rep->lock_policy_res1);
2119 if (rep->lock_policy_res1)
2120 errcode = rep->lock_policy_res1;
2122 *flags |= LDLM_FL_LVB_READY;
2123 } else if (errcode == ELDLM_OK) {
2124 *flags |= LDLM_FL_LVB_READY;
2127 /* Call the update callback. */
2128 rc = (*upcall)(cookie, lockh, errcode);
2130 /* release the reference taken in ldlm_cli_enqueue() */
2131 if (errcode == ELDLM_LOCK_MATCHED)
2133 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2134 ldlm_lock_decref(lockh, mode);
2139 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2140 struct osc_enqueue_args *aa, int rc)
2142 struct ldlm_lock *lock;
2143 struct lustre_handle *lockh = &aa->oa_lockh;
2144 enum ldlm_mode mode = aa->oa_mode;
2145 struct ost_lvb *lvb = aa->oa_lvb;
2146 __u32 lvb_len = sizeof(*lvb);
2151 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2153 lock = ldlm_handle2lock(lockh);
2154 LASSERTF(lock != NULL,
2155 "lockh %#llx, req %p, aa %p - client evicted?\n",
2156 lockh->cookie, req, aa);
2158 /* Take an additional reference so that a blocking AST that
2159 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2160 * to arrive after an upcall has been executed by
2161 * osc_enqueue_fini(). */
2162 ldlm_lock_addref(lockh, mode);
2164 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2165 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2167 /* Let CP AST to grant the lock first. */
2168 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2170 if (aa->oa_speculative) {
2171 LASSERT(aa->oa_lvb == NULL);
2172 LASSERT(aa->oa_flags == NULL);
2173 aa->oa_flags = &flags;
2176 /* Complete obtaining the lock procedure. */
2177 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2178 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2180 /* Complete osc stuff. */
2181 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2182 aa->oa_flags, aa->oa_speculative, rc);
2184 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2186 ldlm_lock_decref(lockh, mode);
2187 LDLM_LOCK_PUT(lock);
2191 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2193 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2194 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2195 * other synchronous requests, however keeping some locks and trying to obtain
2196 * others may take a considerable amount of time in a case of ost failure; and
2197 * when other sync requests do not get released lock from a client, the client
2198 * is evicted from the cluster -- such scenarious make the life difficult, so
2199 * release locks just after they are obtained. */
2200 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2201 __u64 *flags, union ldlm_policy_data *policy,
2202 struct ost_lvb *lvb, int kms_valid,
2203 osc_enqueue_upcall_f upcall, void *cookie,
2204 struct ldlm_enqueue_info *einfo,
2205 struct ptlrpc_request_set *rqset, int async,
2208 struct obd_device *obd = exp->exp_obd;
2209 struct lustre_handle lockh = { 0 };
2210 struct ptlrpc_request *req = NULL;
2211 int intent = *flags & LDLM_FL_HAS_INTENT;
2212 __u64 match_flags = *flags;
2213 enum ldlm_mode mode;
2217 /* Filesystem lock extents are extended to page boundaries so that
2218 * dealing with the page cache is a little smoother. */
2219 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2220 policy->l_extent.end |= ~PAGE_MASK;
2223 * kms is not valid when either object is completely fresh (so that no
2224 * locks are cached), or object was evicted. In the latter case cached
2225 * lock cannot be used, because it would prime inode state with
2226 * potentially stale LVB.
2231 /* Next, search for already existing extent locks that will cover us */
2232 /* If we're trying to read, we also search for an existing PW lock. The
2233 * VFS and page cache already protect us locally, so lots of readers/
2234 * writers can share a single PW lock.
2236 * There are problems with conversion deadlocks, so instead of
2237 * converting a read lock to a write lock, we'll just enqueue a new
2240 * At some point we should cancel the read lock instead of making them
2241 * send us a blocking callback, but there are problems with canceling
2242 * locks out from other users right now, too. */
2243 mode = einfo->ei_mode;
2244 if (einfo->ei_mode == LCK_PR)
2246 /* Normal lock requests must wait for the LVB to be ready before
2247 * matching a lock; speculative lock requests do not need to,
2248 * because they will not actually use the lock. */
2250 match_flags |= LDLM_FL_LVB_READY;
2252 match_flags |= LDLM_FL_BLOCK_GRANTED;
2253 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2254 einfo->ei_type, policy, mode, &lockh, 0);
2256 struct ldlm_lock *matched;
2258 if (*flags & LDLM_FL_TEST_LOCK)
2261 matched = ldlm_handle2lock(&lockh);
2263 /* This DLM lock request is speculative, and does not
2264 * have an associated IO request. Therefore if there
2265 * is already a DLM lock, it wll just inform the
2266 * caller to cancel the request for this stripe.*/
2267 lock_res_and_lock(matched);
2268 if (ldlm_extent_equal(&policy->l_extent,
2269 &matched->l_policy_data.l_extent))
2273 unlock_res_and_lock(matched);
2275 ldlm_lock_decref(&lockh, mode);
2276 LDLM_LOCK_PUT(matched);
2278 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2279 *flags |= LDLM_FL_LVB_READY;
2281 /* We already have a lock, and it's referenced. */
2282 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2284 ldlm_lock_decref(&lockh, mode);
2285 LDLM_LOCK_PUT(matched);
2288 ldlm_lock_decref(&lockh, mode);
2289 LDLM_LOCK_PUT(matched);
2294 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2298 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2299 &RQF_LDLM_ENQUEUE_LVB);
2303 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2305 ptlrpc_request_free(req);
2309 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2311 ptlrpc_request_set_replen(req);
2314 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2315 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2317 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2318 sizeof(*lvb), LVB_T_OST, &lockh, async);
2321 struct osc_enqueue_args *aa;
2322 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2323 aa = ptlrpc_req_async_args(req);
2325 aa->oa_mode = einfo->ei_mode;
2326 aa->oa_type = einfo->ei_type;
2327 lustre_handle_copy(&aa->oa_lockh, &lockh);
2328 aa->oa_upcall = upcall;
2329 aa->oa_cookie = cookie;
2330 aa->oa_speculative = speculative;
2332 aa->oa_flags = flags;
2335 /* speculative locks are essentially to enqueue
2336 * a DLM lock in advance, so we don't care
2337 * about the result of the enqueue. */
2339 aa->oa_flags = NULL;
2342 req->rq_interpret_reply =
2343 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2344 if (rqset == PTLRPCD_SET)
2345 ptlrpcd_add_req(req);
2347 ptlrpc_set_add_req(rqset, req);
2348 } else if (intent) {
2349 ptlrpc_req_finished(req);
2354 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2355 flags, speculative, rc);
2357 ptlrpc_req_finished(req);
2362 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2363 enum ldlm_type type, union ldlm_policy_data *policy,
2364 enum ldlm_mode mode, __u64 *flags, void *data,
2365 struct lustre_handle *lockh, int unref)
2367 struct obd_device *obd = exp->exp_obd;
2368 __u64 lflags = *flags;
2372 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2375 /* Filesystem lock extents are extended to page boundaries so that
2376 * dealing with the page cache is a little smoother */
2377 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2378 policy->l_extent.end |= ~PAGE_MASK;
2380 /* Next, search for already existing extent locks that will cover us */
2381 /* If we're trying to read, we also search for an existing PW lock. The
2382 * VFS and page cache already protect us locally, so lots of readers/
2383 * writers can share a single PW lock. */
2387 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2388 res_id, type, policy, rc, lockh, unref);
2389 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2393 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2395 LASSERT(lock != NULL);
2396 if (!osc_set_lock_data(lock, data)) {
2397 ldlm_lock_decref(lockh, rc);
2400 LDLM_LOCK_PUT(lock);
2405 static int osc_statfs_interpret(const struct lu_env *env,
2406 struct ptlrpc_request *req,
2407 struct osc_async_args *aa, int rc)
2409 struct obd_statfs *msfs;
2413 /* The request has in fact never been sent
2414 * due to issues at a higher level (LOV).
2415 * Exit immediately since the caller is
2416 * aware of the problem and takes care
2417 * of the clean up */
2420 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2421 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2427 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2429 GOTO(out, rc = -EPROTO);
2432 *aa->aa_oi->oi_osfs = *msfs;
2434 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2438 static int osc_statfs_async(struct obd_export *exp,
2439 struct obd_info *oinfo, __u64 max_age,
2440 struct ptlrpc_request_set *rqset)
2442 struct obd_device *obd = class_exp2obd(exp);
2443 struct ptlrpc_request *req;
2444 struct osc_async_args *aa;
2448 /* We could possibly pass max_age in the request (as an absolute
2449 * timestamp or a "seconds.usec ago") so the target can avoid doing
2450 * extra calls into the filesystem if that isn't necessary (e.g.
2451 * during mount that would help a bit). Having relative timestamps
2452 * is not so great if request processing is slow, while absolute
2453 * timestamps are not ideal because they need time synchronization. */
2454 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2458 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2460 ptlrpc_request_free(req);
2463 ptlrpc_request_set_replen(req);
2464 req->rq_request_portal = OST_CREATE_PORTAL;
2465 ptlrpc_at_set_req_timeout(req);
2467 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2468 /* procfs requests not want stat in wait for avoid deadlock */
2469 req->rq_no_resend = 1;
2470 req->rq_no_delay = 1;
2473 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2474 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2475 aa = ptlrpc_req_async_args(req);
2478 ptlrpc_set_add_req(rqset, req);
2482 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2483 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
2485 struct obd_device *obd = class_exp2obd(exp);
2486 struct obd_statfs *msfs;
2487 struct ptlrpc_request *req;
2488 struct obd_import *imp = NULL;
2492 /*Since the request might also come from lprocfs, so we need
2493 *sync this with client_disconnect_export Bug15684*/
2494 down_read(&obd->u.cli.cl_sem);
2495 if (obd->u.cli.cl_import)
2496 imp = class_import_get(obd->u.cli.cl_import);
2497 up_read(&obd->u.cli.cl_sem);
2501 /* We could possibly pass max_age in the request (as an absolute
2502 * timestamp or a "seconds.usec ago") so the target can avoid doing
2503 * extra calls into the filesystem if that isn't necessary (e.g.
2504 * during mount that would help a bit). Having relative timestamps
2505 * is not so great if request processing is slow, while absolute
2506 * timestamps are not ideal because they need time synchronization. */
2507 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2509 class_import_put(imp);
2514 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2516 ptlrpc_request_free(req);
2519 ptlrpc_request_set_replen(req);
2520 req->rq_request_portal = OST_CREATE_PORTAL;
2521 ptlrpc_at_set_req_timeout(req);
2523 if (flags & OBD_STATFS_NODELAY) {
2524 /* procfs requests not want stat in wait for avoid deadlock */
2525 req->rq_no_resend = 1;
2526 req->rq_no_delay = 1;
2529 rc = ptlrpc_queue_wait(req);
2533 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2535 GOTO(out, rc = -EPROTO);
2542 ptlrpc_req_finished(req);
2546 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2547 void *karg, void __user *uarg)
2549 struct obd_device *obd = exp->exp_obd;
2550 struct obd_ioctl_data *data = karg;
2554 if (!try_module_get(THIS_MODULE)) {
2555 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2556 module_name(THIS_MODULE));
2560 case OBD_IOC_CLIENT_RECOVER:
2561 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2562 data->ioc_inlbuf1, 0);
2566 case IOC_OSC_SET_ACTIVE:
2567 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2570 case OBD_IOC_PING_TARGET:
2571 err = ptlrpc_obd_ping(obd);
2574 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2575 cmd, current_comm());
2576 GOTO(out, err = -ENOTTY);
2579 module_put(THIS_MODULE);
2583 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2584 u32 keylen, void *key, u32 vallen, void *val,
2585 struct ptlrpc_request_set *set)
2587 struct ptlrpc_request *req;
2588 struct obd_device *obd = exp->exp_obd;
2589 struct obd_import *imp = class_exp2cliimp(exp);
2594 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2596 if (KEY_IS(KEY_CHECKSUM)) {
2597 if (vallen != sizeof(int))
2599 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2603 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2604 sptlrpc_conf_client_adapt(obd);
2608 if (KEY_IS(KEY_FLUSH_CTX)) {
2609 sptlrpc_import_flush_my_ctx(imp);
2613 if (KEY_IS(KEY_CACHE_SET)) {
2614 struct client_obd *cli = &obd->u.cli;
2616 LASSERT(cli->cl_cache == NULL); /* only once */
2617 cli->cl_cache = (struct cl_client_cache *)val;
2618 cl_cache_incref(cli->cl_cache);
2619 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2621 /* add this osc into entity list */
2622 LASSERT(list_empty(&cli->cl_lru_osc));
2623 spin_lock(&cli->cl_cache->ccc_lru_lock);
2624 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2625 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2630 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2631 struct client_obd *cli = &obd->u.cli;
2632 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2633 long target = *(long *)val;
2635 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2640 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2643 /* We pass all other commands directly to OST. Since nobody calls osc
2644 methods directly and everybody is supposed to go through LOV, we
2645 assume lov checked invalid values for us.
2646 The only recognised values so far are evict_by_nid and mds_conn.
2647 Even if something bad goes through, we'd get a -EINVAL from OST
2650 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2651 &RQF_OST_SET_GRANT_INFO :
2656 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2657 RCL_CLIENT, keylen);
2658 if (!KEY_IS(KEY_GRANT_SHRINK))
2659 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2660 RCL_CLIENT, vallen);
2661 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2663 ptlrpc_request_free(req);
2667 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2668 memcpy(tmp, key, keylen);
2669 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2672 memcpy(tmp, val, vallen);
2674 if (KEY_IS(KEY_GRANT_SHRINK)) {
2675 struct osc_grant_args *aa;
2678 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2679 aa = ptlrpc_req_async_args(req);
2682 ptlrpc_req_finished(req);
2685 *oa = ((struct ost_body *)val)->oa;
2687 req->rq_interpret_reply = osc_shrink_grant_interpret;
2690 ptlrpc_request_set_replen(req);
2691 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2692 LASSERT(set != NULL);
2693 ptlrpc_set_add_req(set, req);
2694 ptlrpc_check_set(NULL, set);
2696 ptlrpcd_add_req(req);
2701 EXPORT_SYMBOL(osc_set_info_async);
2703 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
2704 struct obd_device *obd, struct obd_uuid *cluuid,
2705 struct obd_connect_data *data, void *localdata)
2707 struct client_obd *cli = &obd->u.cli;
2709 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2713 spin_lock(&cli->cl_loi_list_lock);
2714 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2715 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM)
2716 grant += cli->cl_dirty_grant;
2718 grant += cli->cl_dirty_pages << PAGE_SHIFT;
2719 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
2720 lost_grant = cli->cl_lost_grant;
2721 cli->cl_lost_grant = 0;
2722 spin_unlock(&cli->cl_loi_list_lock);
2724 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
2725 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
2726 data->ocd_version, data->ocd_grant, lost_grant);
2731 EXPORT_SYMBOL(osc_reconnect);
2733 int osc_disconnect(struct obd_export *exp)
2735 struct obd_device *obd = class_exp2obd(exp);
2738 rc = client_disconnect_export(exp);
2740 * Initially we put del_shrink_grant before disconnect_export, but it
2741 * causes the following problem if setup (connect) and cleanup
2742 * (disconnect) are tangled together.
2743 * connect p1 disconnect p2
2744 * ptlrpc_connect_import
2745 * ............... class_manual_cleanup
2748 * ptlrpc_connect_interrupt
2750 * add this client to shrink list
2752 * Bang! pinger trigger the shrink.
2753 * So the osc should be disconnected from the shrink list, after we
2754 * are sure the import has been destroyed. BUG18662
2756 if (obd->u.cli.cl_import == NULL)
2757 osc_del_shrink_grant(&obd->u.cli);
2760 EXPORT_SYMBOL(osc_disconnect);
2762 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
2763 struct hlist_node *hnode, void *arg)
2765 struct lu_env *env = arg;
2766 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
2767 struct ldlm_lock *lock;
2768 struct osc_object *osc = NULL;
2772 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
2773 if (lock->l_ast_data != NULL && osc == NULL) {
2774 osc = lock->l_ast_data;
2775 cl_object_get(osc2cl(osc));
2778 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
2779 * by the 2nd round of ldlm_namespace_clean() call in
2780 * osc_import_event(). */
2781 ldlm_clear_cleaned(lock);
2786 osc_object_invalidate(env, osc);
2787 cl_object_put(env, osc2cl(osc));
2792 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
2794 static int osc_import_event(struct obd_device *obd,
2795 struct obd_import *imp,
2796 enum obd_import_event event)
2798 struct client_obd *cli;
2802 LASSERT(imp->imp_obd == obd);
2805 case IMP_EVENT_DISCON: {
2807 spin_lock(&cli->cl_loi_list_lock);
2808 cli->cl_avail_grant = 0;
2809 cli->cl_lost_grant = 0;
2810 spin_unlock(&cli->cl_loi_list_lock);
2813 case IMP_EVENT_INACTIVE: {
2814 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
2817 case IMP_EVENT_INVALIDATE: {
2818 struct ldlm_namespace *ns = obd->obd_namespace;
2822 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2824 env = cl_env_get(&refcheck);
2826 osc_io_unplug(env, &obd->u.cli, NULL);
2828 cfs_hash_for_each_nolock(ns->ns_rs_hash,
2829 osc_ldlm_resource_invalidate,
2831 cl_env_put(env, &refcheck);
2833 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2838 case IMP_EVENT_ACTIVE: {
2839 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
2842 case IMP_EVENT_OCD: {
2843 struct obd_connect_data *ocd = &imp->imp_connect_data;
2845 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
2846 osc_init_grant(&obd->u.cli, ocd);
2849 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
2850 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
2852 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
2855 case IMP_EVENT_DEACTIVATE: {
2856 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
2859 case IMP_EVENT_ACTIVATE: {
2860 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
2864 CERROR("Unknown import event %d\n", event);
2871 * Determine whether the lock can be canceled before replaying the lock
2872 * during recovery, see bug16774 for detailed information.
2874 * \retval zero the lock can't be canceled
2875 * \retval other ok to cancel
2877 static int osc_cancel_weight(struct ldlm_lock *lock)
2880 * Cancel all unused and granted extent lock.
2882 if (lock->l_resource->lr_type == LDLM_EXTENT &&
2883 lock->l_granted_mode == lock->l_req_mode &&
2884 osc_ldlm_weigh_ast(lock) == 0)
2890 static int brw_queue_work(const struct lu_env *env, void *data)
2892 struct client_obd *cli = data;
2894 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
2896 osc_io_unplug(env, cli, NULL);
2900 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
2902 struct client_obd *cli = &obd->u.cli;
2908 rc = ptlrpcd_addref();
2912 rc = client_obd_setup(obd, lcfg);
2914 GOTO(out_ptlrpcd, rc);
2917 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
2918 if (IS_ERR(handler))
2919 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2920 cli->cl_writeback_work = handler;
2922 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
2923 if (IS_ERR(handler))
2924 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2925 cli->cl_lru_work = handler;
2927 rc = osc_quota_setup(obd);
2929 GOTO(out_ptlrpcd_work, rc);
2931 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
2933 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
2937 if (cli->cl_writeback_work != NULL) {
2938 ptlrpcd_destroy_work(cli->cl_writeback_work);
2939 cli->cl_writeback_work = NULL;
2941 if (cli->cl_lru_work != NULL) {
2942 ptlrpcd_destroy_work(cli->cl_lru_work);
2943 cli->cl_lru_work = NULL;
2945 client_obd_cleanup(obd);
2950 EXPORT_SYMBOL(osc_setup_common);
2952 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2954 struct client_obd *cli = &obd->u.cli;
2955 struct obd_type *type;
2963 rc = osc_setup_common(obd, lcfg);
2967 #ifdef CONFIG_PROC_FS
2968 obd->obd_vars = lprocfs_osc_obd_vars;
2970 /* If this is true then both client (osc) and server (osp) are on the
2971 * same node. The osp layer if loaded first will register the osc proc
2972 * directory. In that case this obd_device will be attached its proc
2973 * tree to type->typ_procsym instead of obd->obd_type->typ_procroot.
2975 type = class_search_type(LUSTRE_OSP_NAME);
2976 if (type && type->typ_procsym) {
2977 obd->obd_proc_entry = lprocfs_register(obd->obd_name,
2979 obd->obd_vars, obd);
2980 if (IS_ERR(obd->obd_proc_entry)) {
2981 rc = PTR_ERR(obd->obd_proc_entry);
2982 CERROR("error %d setting up lprocfs for %s\n", rc,
2984 obd->obd_proc_entry = NULL;
2988 rc = lprocfs_obd_setup(obd, false);
2990 /* If the basic OSC proc tree construction succeeded then
2993 lproc_osc_attach_seqstat(obd);
2994 sptlrpc_lprocfs_cliobd_attach(obd);
2995 ptlrpc_lprocfs_register_obd(obd);
2999 * We try to control the total number of requests with a upper limit
3000 * osc_reqpool_maxreqcount. There might be some race which will cause
3001 * over-limit allocation, but it is fine.
3003 req_count = atomic_read(&osc_pool_req_count);
3004 if (req_count < osc_reqpool_maxreqcount) {
3005 adding = cli->cl_max_rpcs_in_flight + 2;
3006 if (req_count + adding > osc_reqpool_maxreqcount)
3007 adding = osc_reqpool_maxreqcount - req_count;
3009 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3010 atomic_add(added, &osc_pool_req_count);
3013 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
3014 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3016 spin_lock(&osc_shrink_lock);
3017 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3018 spin_unlock(&osc_shrink_lock);
3023 int osc_precleanup_common(struct obd_device *obd)
3025 struct client_obd *cli = &obd->u.cli;
3029 * for echo client, export may be on zombie list, wait for
3030 * zombie thread to cull it, because cli.cl_import will be
3031 * cleared in client_disconnect_export():
3032 * class_export_destroy() -> obd_cleanup() ->
3033 * echo_device_free() -> echo_client_cleanup() ->
3034 * obd_disconnect() -> osc_disconnect() ->
3035 * client_disconnect_export()
3037 obd_zombie_barrier();
3038 if (cli->cl_writeback_work) {
3039 ptlrpcd_destroy_work(cli->cl_writeback_work);
3040 cli->cl_writeback_work = NULL;
3043 if (cli->cl_lru_work) {
3044 ptlrpcd_destroy_work(cli->cl_lru_work);
3045 cli->cl_lru_work = NULL;
3048 obd_cleanup_client_import(obd);
3051 EXPORT_SYMBOL(osc_precleanup_common);
3053 static int osc_precleanup(struct obd_device *obd)
3057 osc_precleanup_common(obd);
3059 ptlrpc_lprocfs_unregister_obd(obd);
3060 lprocfs_obd_cleanup(obd);
3064 int osc_cleanup_common(struct obd_device *obd)
3066 struct client_obd *cli = &obd->u.cli;
3071 spin_lock(&osc_shrink_lock);
3072 list_del(&cli->cl_shrink_list);
3073 spin_unlock(&osc_shrink_lock);
3076 if (cli->cl_cache != NULL) {
3077 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3078 spin_lock(&cli->cl_cache->ccc_lru_lock);
3079 list_del_init(&cli->cl_lru_osc);
3080 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3081 cli->cl_lru_left = NULL;
3082 cl_cache_decref(cli->cl_cache);
3083 cli->cl_cache = NULL;
3086 /* free memory of osc quota cache */
3087 osc_quota_cleanup(obd);
3089 rc = client_obd_cleanup(obd);
3094 EXPORT_SYMBOL(osc_cleanup_common);
3096 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3098 int rc = class_process_proc_param(PARAM_OSC, obd->obd_vars, lcfg, obd);
3099 return rc > 0 ? 0: rc;
3102 static int osc_process_config(struct obd_device *obd, size_t len, void *buf)
3104 return osc_process_config_base(obd, buf);
3107 static struct obd_ops osc_obd_ops = {
3108 .o_owner = THIS_MODULE,
3109 .o_setup = osc_setup,
3110 .o_precleanup = osc_precleanup,
3111 .o_cleanup = osc_cleanup_common,
3112 .o_add_conn = client_import_add_conn,
3113 .o_del_conn = client_import_del_conn,
3114 .o_connect = client_connect_import,
3115 .o_reconnect = osc_reconnect,
3116 .o_disconnect = osc_disconnect,
3117 .o_statfs = osc_statfs,
3118 .o_statfs_async = osc_statfs_async,
3119 .o_create = osc_create,
3120 .o_destroy = osc_destroy,
3121 .o_getattr = osc_getattr,
3122 .o_setattr = osc_setattr,
3123 .o_iocontrol = osc_iocontrol,
3124 .o_set_info_async = osc_set_info_async,
3125 .o_import_event = osc_import_event,
3126 .o_process_config = osc_process_config,
3127 .o_quotactl = osc_quotactl,
3130 static struct shrinker *osc_cache_shrinker;
3131 struct list_head osc_shrink_list = LIST_HEAD_INIT(osc_shrink_list);
3132 DEFINE_SPINLOCK(osc_shrink_lock);
3134 #ifndef HAVE_SHRINKER_COUNT
3135 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3137 struct shrink_control scv = {
3138 .nr_to_scan = shrink_param(sc, nr_to_scan),
3139 .gfp_mask = shrink_param(sc, gfp_mask)
3141 #if !defined(HAVE_SHRINKER_WANT_SHRINK_PTR) && !defined(HAVE_SHRINK_CONTROL)
3142 struct shrinker *shrinker = NULL;
3145 (void)osc_cache_shrink_scan(shrinker, &scv);
3147 return osc_cache_shrink_count(shrinker, &scv);
3151 static int __init osc_init(void)
3153 bool enable_proc = true;
3154 struct obd_type *type;
3155 unsigned int reqpool_size;
3156 unsigned int reqsize;
3158 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3159 osc_cache_shrink_count, osc_cache_shrink_scan);
3162 /* print an address of _any_ initialized kernel symbol from this
3163 * module, to allow debugging with gdb that doesn't support data
3164 * symbols from modules.*/
3165 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3167 rc = lu_kmem_init(osc_caches);
3171 type = class_search_type(LUSTRE_OSP_NAME);
3172 if (type != NULL && type->typ_procsym != NULL)
3173 enable_proc = false;
3175 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
3176 LUSTRE_OSC_NAME, &osc_device_type);
3180 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3182 /* This is obviously too much memory, only prevent overflow here */
3183 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3184 GOTO(out_type, rc = -EINVAL);
3186 reqpool_size = osc_reqpool_mem_max << 20;
3189 while (reqsize < OST_IO_MAXREQSIZE)
3190 reqsize = reqsize << 1;
3193 * We don't enlarge the request count in OSC pool according to
3194 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3195 * tried after normal allocation failed. So a small OSC pool won't
3196 * cause much performance degression in most of cases.
3198 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3200 atomic_set(&osc_pool_req_count, 0);
3201 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3202 ptlrpc_add_rqs_to_pool);
3204 if (osc_rq_pool != NULL)
3208 class_unregister_type(LUSTRE_OSC_NAME);
3210 lu_kmem_fini(osc_caches);
3215 static void __exit osc_exit(void)
3217 remove_shrinker(osc_cache_shrinker);
3218 class_unregister_type(LUSTRE_OSC_NAME);
3219 lu_kmem_fini(osc_caches);
3220 ptlrpc_free_rq_pool(osc_rq_pool);
3223 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3224 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3225 MODULE_VERSION(LUSTRE_VERSION_STRING);
3226 MODULE_LICENSE("GPL");
3228 module_init(osc_init);
3229 module_exit(osc_exit);