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, 2017, 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 <lprocfs_status.h>
36 #include <lustre_debug.h>
37 #include <lustre_dlm.h>
38 #include <lustre_fid.h>
39 #include <lustre_ha.h>
40 #include <uapi/linux/lustre/lustre_ioctl.h>
41 #include <lustre_net.h>
42 #include <lustre_obdo.h>
43 #include <uapi/linux/lustre/lustre_param.h>
45 #include <obd_cksum.h>
46 #include <obd_class.h>
47 #include <lustre_osc.h>
49 #include "osc_internal.h"
51 atomic_t osc_pool_req_count;
52 unsigned int osc_reqpool_maxreqcount;
53 struct ptlrpc_request_pool *osc_rq_pool;
55 /* max memory used for request pool, unit is MB */
56 static unsigned int osc_reqpool_mem_max = 5;
57 module_param(osc_reqpool_mem_max, uint, 0444);
59 #define osc_grant_args osc_brw_async_args
61 struct osc_setattr_args {
63 obd_enqueue_update_f sa_upcall;
67 struct osc_fsync_args {
68 struct osc_object *fa_obj;
70 obd_enqueue_update_f fa_upcall;
74 struct osc_ladvise_args {
76 obd_enqueue_update_f la_upcall;
80 static void osc_release_ppga(struct brw_page **ppga, size_t count);
81 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
84 void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
86 struct ost_body *body;
88 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
91 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
94 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
97 struct ptlrpc_request *req;
98 struct ost_body *body;
102 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
106 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
108 ptlrpc_request_free(req);
112 osc_pack_req_body(req, oa);
114 ptlrpc_request_set_replen(req);
116 rc = ptlrpc_queue_wait(req);
120 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
122 GOTO(out, rc = -EPROTO);
124 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
125 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
127 oa->o_blksize = cli_brw_size(exp->exp_obd);
128 oa->o_valid |= OBD_MD_FLBLKSZ;
132 ptlrpc_req_finished(req);
137 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
140 struct ptlrpc_request *req;
141 struct ost_body *body;
145 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
147 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
151 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
153 ptlrpc_request_free(req);
157 osc_pack_req_body(req, oa);
159 ptlrpc_request_set_replen(req);
161 rc = ptlrpc_queue_wait(req);
165 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
167 GOTO(out, rc = -EPROTO);
169 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
173 ptlrpc_req_finished(req);
178 static int osc_setattr_interpret(const struct lu_env *env,
179 struct ptlrpc_request *req,
180 struct osc_setattr_args *sa, int rc)
182 struct ost_body *body;
188 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
190 GOTO(out, rc = -EPROTO);
192 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
195 rc = sa->sa_upcall(sa->sa_cookie, rc);
199 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
200 obd_enqueue_update_f upcall, void *cookie,
201 struct ptlrpc_request_set *rqset)
203 struct ptlrpc_request *req;
204 struct osc_setattr_args *sa;
209 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
213 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
215 ptlrpc_request_free(req);
219 osc_pack_req_body(req, oa);
221 ptlrpc_request_set_replen(req);
223 /* do mds to ost setattr asynchronously */
225 /* Do not wait for response. */
226 ptlrpcd_add_req(req);
228 req->rq_interpret_reply =
229 (ptlrpc_interpterer_t)osc_setattr_interpret;
231 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
232 sa = ptlrpc_req_async_args(req);
234 sa->sa_upcall = upcall;
235 sa->sa_cookie = cookie;
237 if (rqset == PTLRPCD_SET)
238 ptlrpcd_add_req(req);
240 ptlrpc_set_add_req(rqset, req);
246 static int osc_ladvise_interpret(const struct lu_env *env,
247 struct ptlrpc_request *req,
250 struct osc_ladvise_args *la = arg;
251 struct ost_body *body;
257 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
259 GOTO(out, rc = -EPROTO);
261 *la->la_oa = body->oa;
263 rc = la->la_upcall(la->la_cookie, rc);
268 * If rqset is NULL, do not wait for response. Upcall and cookie could also
269 * be NULL in this case
271 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
272 struct ladvise_hdr *ladvise_hdr,
273 obd_enqueue_update_f upcall, void *cookie,
274 struct ptlrpc_request_set *rqset)
276 struct ptlrpc_request *req;
277 struct ost_body *body;
278 struct osc_ladvise_args *la;
280 struct lu_ladvise *req_ladvise;
281 struct lu_ladvise *ladvise = ladvise_hdr->lah_advise;
282 int num_advise = ladvise_hdr->lah_count;
283 struct ladvise_hdr *req_ladvise_hdr;
286 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_LADVISE);
290 req_capsule_set_size(&req->rq_pill, &RMF_OST_LADVISE, RCL_CLIENT,
291 num_advise * sizeof(*ladvise));
292 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_LADVISE);
294 ptlrpc_request_free(req);
297 req->rq_request_portal = OST_IO_PORTAL;
298 ptlrpc_at_set_req_timeout(req);
300 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
302 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
305 req_ladvise_hdr = req_capsule_client_get(&req->rq_pill,
306 &RMF_OST_LADVISE_HDR);
307 memcpy(req_ladvise_hdr, ladvise_hdr, sizeof(*ladvise_hdr));
309 req_ladvise = req_capsule_client_get(&req->rq_pill, &RMF_OST_LADVISE);
310 memcpy(req_ladvise, ladvise, sizeof(*ladvise) * num_advise);
311 ptlrpc_request_set_replen(req);
314 /* Do not wait for response. */
315 ptlrpcd_add_req(req);
319 req->rq_interpret_reply = osc_ladvise_interpret;
320 CLASSERT(sizeof(*la) <= sizeof(req->rq_async_args));
321 la = ptlrpc_req_async_args(req);
323 la->la_upcall = upcall;
324 la->la_cookie = cookie;
326 if (rqset == PTLRPCD_SET)
327 ptlrpcd_add_req(req);
329 ptlrpc_set_add_req(rqset, req);
334 static int osc_create(const struct lu_env *env, struct obd_export *exp,
337 struct ptlrpc_request *req;
338 struct ost_body *body;
343 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
344 LASSERT(fid_seq_is_echo(ostid_seq(&oa->o_oi)));
346 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
348 GOTO(out, rc = -ENOMEM);
350 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
352 ptlrpc_request_free(req);
356 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
359 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
361 ptlrpc_request_set_replen(req);
363 rc = ptlrpc_queue_wait(req);
367 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
369 GOTO(out_req, rc = -EPROTO);
371 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
372 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
374 oa->o_blksize = cli_brw_size(exp->exp_obd);
375 oa->o_valid |= OBD_MD_FLBLKSZ;
377 CDEBUG(D_HA, "transno: %lld\n",
378 lustre_msg_get_transno(req->rq_repmsg));
380 ptlrpc_req_finished(req);
385 int osc_punch_send(struct obd_export *exp, struct obdo *oa,
386 obd_enqueue_update_f upcall, void *cookie)
388 struct ptlrpc_request *req;
389 struct osc_setattr_args *sa;
390 struct obd_import *imp = class_exp2cliimp(exp);
391 struct ost_body *body;
396 req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
400 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
402 ptlrpc_request_free(req);
406 osc_set_io_portal(req);
408 ptlrpc_at_set_req_timeout(req);
410 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
412 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
414 ptlrpc_request_set_replen(req);
416 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
417 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
418 sa = ptlrpc_req_async_args(req);
420 sa->sa_upcall = upcall;
421 sa->sa_cookie = cookie;
423 ptlrpcd_add_req(req);
427 EXPORT_SYMBOL(osc_punch_send);
429 static int osc_sync_interpret(const struct lu_env *env,
430 struct ptlrpc_request *req,
433 struct osc_fsync_args *fa = arg;
434 struct ost_body *body;
435 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
436 unsigned long valid = 0;
437 struct cl_object *obj;
443 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
445 CERROR("can't unpack ost_body\n");
446 GOTO(out, rc = -EPROTO);
449 *fa->fa_oa = body->oa;
450 obj = osc2cl(fa->fa_obj);
452 /* Update osc object's blocks attribute */
453 cl_object_attr_lock(obj);
454 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
455 attr->cat_blocks = body->oa.o_blocks;
460 cl_object_attr_update(env, obj, attr, valid);
461 cl_object_attr_unlock(obj);
464 rc = fa->fa_upcall(fa->fa_cookie, rc);
468 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
469 obd_enqueue_update_f upcall, void *cookie,
470 struct ptlrpc_request_set *rqset)
472 struct obd_export *exp = osc_export(obj);
473 struct ptlrpc_request *req;
474 struct ost_body *body;
475 struct osc_fsync_args *fa;
479 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
483 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
485 ptlrpc_request_free(req);
489 /* overload the size and blocks fields in the oa with start/end */
490 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
492 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
494 ptlrpc_request_set_replen(req);
495 req->rq_interpret_reply = osc_sync_interpret;
497 CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
498 fa = ptlrpc_req_async_args(req);
501 fa->fa_upcall = upcall;
502 fa->fa_cookie = cookie;
504 if (rqset == PTLRPCD_SET)
505 ptlrpcd_add_req(req);
507 ptlrpc_set_add_req(rqset, req);
512 /* Find and cancel locally locks matched by @mode in the resource found by
513 * @objid. Found locks are added into @cancel list. Returns the amount of
514 * locks added to @cancels list. */
515 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
516 struct list_head *cancels,
517 enum ldlm_mode mode, __u64 lock_flags)
519 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
520 struct ldlm_res_id res_id;
521 struct ldlm_resource *res;
525 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
526 * export) but disabled through procfs (flag in NS).
528 * This distinguishes from a case when ELC is not supported originally,
529 * when we still want to cancel locks in advance and just cancel them
530 * locally, without sending any RPC. */
531 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
534 ostid_build_res_name(&oa->o_oi, &res_id);
535 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
539 LDLM_RESOURCE_ADDREF(res);
540 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
541 lock_flags, 0, NULL);
542 LDLM_RESOURCE_DELREF(res);
543 ldlm_resource_putref(res);
547 static int osc_destroy_interpret(const struct lu_env *env,
548 struct ptlrpc_request *req, void *data,
551 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
553 atomic_dec(&cli->cl_destroy_in_flight);
554 wake_up(&cli->cl_destroy_waitq);
558 static int osc_can_send_destroy(struct client_obd *cli)
560 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
561 cli->cl_max_rpcs_in_flight) {
562 /* The destroy request can be sent */
565 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
566 cli->cl_max_rpcs_in_flight) {
568 * The counter has been modified between the two atomic
571 wake_up(&cli->cl_destroy_waitq);
576 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
579 struct client_obd *cli = &exp->exp_obd->u.cli;
580 struct ptlrpc_request *req;
581 struct ost_body *body;
582 struct list_head cancels = LIST_HEAD_INIT(cancels);
587 CDEBUG(D_INFO, "oa NULL\n");
591 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
592 LDLM_FL_DISCARD_DATA);
594 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
596 ldlm_lock_list_put(&cancels, l_bl_ast, count);
600 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
603 ptlrpc_request_free(req);
607 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
608 ptlrpc_at_set_req_timeout(req);
610 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
612 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
614 ptlrpc_request_set_replen(req);
616 req->rq_interpret_reply = osc_destroy_interpret;
617 if (!osc_can_send_destroy(cli)) {
618 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
621 * Wait until the number of on-going destroy RPCs drops
622 * under max_rpc_in_flight
624 rc = l_wait_event_exclusive(cli->cl_destroy_waitq,
625 osc_can_send_destroy(cli), &lwi);
627 ptlrpc_req_finished(req);
632 /* Do not wait for response */
633 ptlrpcd_add_req(req);
637 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
640 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
642 LASSERT(!(oa->o_valid & bits));
645 spin_lock(&cli->cl_loi_list_lock);
646 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data, GRANT_PARAM))
647 oa->o_dirty = cli->cl_dirty_grant;
649 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
650 if (unlikely(cli->cl_dirty_pages - cli->cl_dirty_transit >
651 cli->cl_dirty_max_pages)) {
652 CERROR("dirty %lu - %lu > dirty_max %lu\n",
653 cli->cl_dirty_pages, cli->cl_dirty_transit,
654 cli->cl_dirty_max_pages);
656 } else if (unlikely(atomic_long_read(&obd_dirty_pages) -
657 atomic_long_read(&obd_dirty_transit_pages) >
658 (long)(obd_max_dirty_pages + 1))) {
659 /* The atomic_read() allowing the atomic_inc() are
660 * not covered by a lock thus they may safely race and trip
661 * this CERROR() unless we add in a small fudge factor (+1). */
662 CERROR("%s: dirty %ld - %ld > system dirty_max %ld\n",
663 cli_name(cli), atomic_long_read(&obd_dirty_pages),
664 atomic_long_read(&obd_dirty_transit_pages),
665 obd_max_dirty_pages);
667 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
669 CERROR("dirty %lu - dirty_max %lu too big???\n",
670 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
673 unsigned long nrpages;
675 nrpages = cli->cl_max_pages_per_rpc;
676 nrpages *= cli->cl_max_rpcs_in_flight + 1;
677 nrpages = max(nrpages, cli->cl_dirty_max_pages);
678 oa->o_undirty = nrpages << PAGE_SHIFT;
679 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data,
683 /* take extent tax into account when asking for more
685 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
686 cli->cl_max_extent_pages;
687 oa->o_undirty += nrextents * cli->cl_grant_extent_tax;
690 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
691 oa->o_dropped = cli->cl_lost_grant;
692 cli->cl_lost_grant = 0;
693 spin_unlock(&cli->cl_loi_list_lock);
694 CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
695 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
698 void osc_update_next_shrink(struct client_obd *cli)
700 cli->cl_next_shrink_grant = ktime_get_seconds() +
701 cli->cl_grant_shrink_interval;
703 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
704 cli->cl_next_shrink_grant);
707 static void __osc_update_grant(struct client_obd *cli, u64 grant)
709 spin_lock(&cli->cl_loi_list_lock);
710 cli->cl_avail_grant += grant;
711 spin_unlock(&cli->cl_loi_list_lock);
714 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
716 if (body->oa.o_valid & OBD_MD_FLGRANT) {
717 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
718 __osc_update_grant(cli, body->oa.o_grant);
722 static int osc_shrink_grant_interpret(const struct lu_env *env,
723 struct ptlrpc_request *req,
726 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
727 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
728 struct ost_body *body;
731 __osc_update_grant(cli, oa->o_grant);
735 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
737 osc_update_grant(cli, body);
743 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
745 spin_lock(&cli->cl_loi_list_lock);
746 oa->o_grant = cli->cl_avail_grant / 4;
747 cli->cl_avail_grant -= oa->o_grant;
748 spin_unlock(&cli->cl_loi_list_lock);
749 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
750 oa->o_valid |= OBD_MD_FLFLAGS;
753 oa->o_flags |= OBD_FL_SHRINK_GRANT;
754 osc_update_next_shrink(cli);
757 /* Shrink the current grant, either from some large amount to enough for a
758 * full set of in-flight RPCs, or if we have already shrunk to that limit
759 * then to enough for a single RPC. This avoids keeping more grant than
760 * needed, and avoids shrinking the grant piecemeal. */
761 static int osc_shrink_grant(struct client_obd *cli)
763 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
764 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
766 spin_lock(&cli->cl_loi_list_lock);
767 if (cli->cl_avail_grant <= target_bytes)
768 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
769 spin_unlock(&cli->cl_loi_list_lock);
771 return osc_shrink_grant_to_target(cli, target_bytes);
774 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
777 struct ost_body *body;
780 spin_lock(&cli->cl_loi_list_lock);
781 /* Don't shrink if we are already above or below the desired limit
782 * We don't want to shrink below a single RPC, as that will negatively
783 * impact block allocation and long-term performance. */
784 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
785 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
787 if (target_bytes >= cli->cl_avail_grant) {
788 spin_unlock(&cli->cl_loi_list_lock);
791 spin_unlock(&cli->cl_loi_list_lock);
797 osc_announce_cached(cli, &body->oa, 0);
799 spin_lock(&cli->cl_loi_list_lock);
800 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
801 cli->cl_avail_grant = target_bytes;
802 spin_unlock(&cli->cl_loi_list_lock);
803 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
804 body->oa.o_valid |= OBD_MD_FLFLAGS;
805 body->oa.o_flags = 0;
807 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
808 osc_update_next_shrink(cli);
810 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
811 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
812 sizeof(*body), body, NULL);
814 __osc_update_grant(cli, body->oa.o_grant);
819 static int osc_should_shrink_grant(struct client_obd *client)
821 time64_t next_shrink = client->cl_next_shrink_grant;
823 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
824 OBD_CONNECT_GRANT_SHRINK) == 0)
827 if (ktime_get_seconds() >= next_shrink - 5) {
828 /* Get the current RPC size directly, instead of going via:
829 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
830 * Keep comment here so that it can be found by searching. */
831 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
833 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
834 client->cl_avail_grant > brw_size)
837 osc_update_next_shrink(client);
842 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
844 struct client_obd *client;
846 list_for_each_entry(client, &item->ti_obd_list, cl_grant_shrink_list) {
847 if (osc_should_shrink_grant(client))
848 osc_shrink_grant(client);
853 static int osc_add_shrink_grant(struct client_obd *client)
857 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
859 osc_grant_shrink_grant_cb, NULL,
860 &client->cl_grant_shrink_list);
862 CERROR("add grant client %s error %d\n", cli_name(client), rc);
865 CDEBUG(D_CACHE, "add grant client %s\n", cli_name(client));
866 osc_update_next_shrink(client);
870 static int osc_del_shrink_grant(struct client_obd *client)
872 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
876 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
879 * ocd_grant is the total grant amount we're expect to hold: if we've
880 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
881 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
884 * race is tolerable here: if we're evicted, but imp_state already
885 * left EVICTED state, then cl_dirty_pages must be 0 already.
887 spin_lock(&cli->cl_loi_list_lock);
888 cli->cl_avail_grant = ocd->ocd_grant;
889 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
890 cli->cl_avail_grant -= cli->cl_reserved_grant;
891 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
892 cli->cl_avail_grant -= cli->cl_dirty_grant;
894 cli->cl_avail_grant -=
895 cli->cl_dirty_pages << PAGE_SHIFT;
898 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
902 /* overhead for each extent insertion */
903 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
904 /* determine the appropriate chunk size used by osc_extent. */
905 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
906 ocd->ocd_grant_blkbits);
907 /* max_pages_per_rpc must be chunk aligned */
908 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
909 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
910 ~chunk_mask) & chunk_mask;
911 /* determine maximum extent size, in #pages */
912 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
913 cli->cl_max_extent_pages = size >> PAGE_SHIFT;
914 if (cli->cl_max_extent_pages == 0)
915 cli->cl_max_extent_pages = 1;
917 cli->cl_grant_extent_tax = 0;
918 cli->cl_chunkbits = PAGE_SHIFT;
919 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
921 spin_unlock(&cli->cl_loi_list_lock);
923 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
924 "chunk bits: %d cl_max_extent_pages: %d\n",
926 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
927 cli->cl_max_extent_pages);
929 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
930 list_empty(&cli->cl_grant_shrink_list))
931 osc_add_shrink_grant(cli);
933 EXPORT_SYMBOL(osc_init_grant);
935 /* We assume that the reason this OSC got a short read is because it read
936 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
937 * via the LOV, and it _knows_ it's reading inside the file, it's just that
938 * this stripe never got written at or beyond this stripe offset yet. */
939 static void handle_short_read(int nob_read, size_t page_count,
940 struct brw_page **pga)
945 /* skip bytes read OK */
946 while (nob_read > 0) {
947 LASSERT (page_count > 0);
949 if (pga[i]->count > nob_read) {
950 /* EOF inside this page */
951 ptr = kmap(pga[i]->pg) +
952 (pga[i]->off & ~PAGE_MASK);
953 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
960 nob_read -= pga[i]->count;
965 /* zero remaining pages */
966 while (page_count-- > 0) {
967 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
968 memset(ptr, 0, pga[i]->count);
974 static int check_write_rcs(struct ptlrpc_request *req,
975 int requested_nob, int niocount,
976 size_t page_count, struct brw_page **pga)
981 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
982 sizeof(*remote_rcs) *
984 if (remote_rcs == NULL) {
985 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
989 /* return error if any niobuf was in error */
990 for (i = 0; i < niocount; i++) {
991 if ((int)remote_rcs[i] < 0)
992 return(remote_rcs[i]);
994 if (remote_rcs[i] != 0) {
995 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
996 i, remote_rcs[i], req);
1000 if (req->rq_bulk != NULL &&
1001 req->rq_bulk->bd_nob_transferred != requested_nob) {
1002 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1003 req->rq_bulk->bd_nob_transferred, requested_nob);
1010 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1012 if (p1->flag != p2->flag) {
1013 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1014 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1015 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1017 /* warn if we try to combine flags that we don't know to be
1018 * safe to combine */
1019 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1020 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1021 "report this at https://jira.hpdd.intel.com/\n",
1022 p1->flag, p2->flag);
1027 return (p1->off + p1->count == p2->off);
1030 static int osc_checksum_bulk(int nob, size_t pg_count,
1031 struct brw_page **pga, int opc,
1032 enum cksum_types cksum_type,
1036 struct cfs_crypto_hash_desc *hdesc;
1037 unsigned int bufsize;
1038 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1040 LASSERT(pg_count > 0);
1042 hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1043 if (IS_ERR(hdesc)) {
1044 CERROR("Unable to initialize checksum hash %s\n",
1045 cfs_crypto_hash_name(cfs_alg));
1046 return PTR_ERR(hdesc);
1049 while (nob > 0 && pg_count > 0) {
1050 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1052 /* corrupt the data before we compute the checksum, to
1053 * simulate an OST->client data error */
1054 if (i == 0 && opc == OST_READ &&
1055 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1056 unsigned char *ptr = kmap(pga[i]->pg);
1057 int off = pga[i]->off & ~PAGE_MASK;
1059 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1062 cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
1063 pga[i]->off & ~PAGE_MASK,
1065 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1066 (int)(pga[i]->off & ~PAGE_MASK));
1068 nob -= pga[i]->count;
1073 bufsize = sizeof(*cksum);
1074 cfs_crypto_hash_final(hdesc, (unsigned char *)cksum, &bufsize);
1076 /* For sending we only compute the wrong checksum instead
1077 * of corrupting the data so it is still correct on a redo */
1078 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1085 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1086 u32 page_count, struct brw_page **pga,
1087 struct ptlrpc_request **reqp, int resend)
1089 struct ptlrpc_request *req;
1090 struct ptlrpc_bulk_desc *desc;
1091 struct ost_body *body;
1092 struct obd_ioobj *ioobj;
1093 struct niobuf_remote *niobuf;
1094 int niocount, i, requested_nob, opc, rc, short_io_size = 0;
1095 struct osc_brw_async_args *aa;
1096 struct req_capsule *pill;
1097 struct brw_page *pg_prev;
1101 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1102 RETURN(-ENOMEM); /* Recoverable */
1103 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1104 RETURN(-EINVAL); /* Fatal */
1106 if ((cmd & OBD_BRW_WRITE) != 0) {
1108 req = ptlrpc_request_alloc_pool(cli->cl_import,
1110 &RQF_OST_BRW_WRITE);
1113 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1118 for (niocount = i = 1; i < page_count; i++) {
1119 if (!can_merge_pages(pga[i - 1], pga[i]))
1123 pill = &req->rq_pill;
1124 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1126 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1127 niocount * sizeof(*niobuf));
1129 for (i = 0; i < page_count; i++)
1130 short_io_size += pga[i]->count;
1132 /* Check if we can do a short io. */
1133 if (!(short_io_size <= cli->cl_short_io_bytes && niocount == 1 &&
1134 imp_connect_shortio(cli->cl_import)))
1137 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1138 opc == OST_READ ? 0 : short_io_size);
1139 if (opc == OST_READ)
1140 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1143 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1145 ptlrpc_request_free(req);
1148 osc_set_io_portal(req);
1150 ptlrpc_at_set_req_timeout(req);
1151 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1153 req->rq_no_retry_einprogress = 1;
1155 if (short_io_size != 0) {
1157 short_io_buf = NULL;
1161 desc = ptlrpc_prep_bulk_imp(req, page_count,
1162 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1163 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1164 PTLRPC_BULK_PUT_SINK) |
1165 PTLRPC_BULK_BUF_KIOV,
1167 &ptlrpc_bulk_kiov_pin_ops);
1170 GOTO(out, rc = -ENOMEM);
1171 /* NB request now owns desc and will free it when it gets freed */
1173 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1174 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1175 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1176 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1178 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1180 /* For READ and WRITE, we can't fill o_uid and o_gid using from_kuid()
1181 * and from_kgid(), because they are asynchronous. Fortunately, variable
1182 * oa contains valid o_uid and o_gid in these two operations.
1183 * Besides, filling o_uid and o_gid is enough for nrs-tbf, see LU-9658.
1184 * OBD_MD_FLUID and OBD_MD_FLUID is not set in order to avoid breaking
1185 * other process logic */
1186 body->oa.o_uid = oa->o_uid;
1187 body->oa.o_gid = oa->o_gid;
1189 obdo_to_ioobj(oa, ioobj);
1190 ioobj->ioo_bufcnt = niocount;
1191 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1192 * that might be send for this request. The actual number is decided
1193 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1194 * "max - 1" for old client compatibility sending "0", and also so the
1195 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1197 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1199 ioobj_max_brw_set(ioobj, 0);
1201 if (short_io_size != 0) {
1202 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1203 body->oa.o_valid |= OBD_MD_FLFLAGS;
1204 body->oa.o_flags = 0;
1206 body->oa.o_flags |= OBD_FL_SHORT_IO;
1207 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1209 if (opc == OST_WRITE) {
1210 short_io_buf = req_capsule_client_get(pill,
1212 LASSERT(short_io_buf != NULL);
1216 LASSERT(page_count > 0);
1218 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1219 struct brw_page *pg = pga[i];
1220 int poff = pg->off & ~PAGE_MASK;
1222 LASSERT(pg->count > 0);
1223 /* make sure there is no gap in the middle of page array */
1224 LASSERTF(page_count == 1 ||
1225 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1226 ergo(i > 0 && i < page_count - 1,
1227 poff == 0 && pg->count == PAGE_SIZE) &&
1228 ergo(i == page_count - 1, poff == 0)),
1229 "i: %d/%d pg: %p off: %llu, count: %u\n",
1230 i, page_count, pg, pg->off, pg->count);
1231 LASSERTF(i == 0 || pg->off > pg_prev->off,
1232 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1233 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1235 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1236 pg_prev->pg, page_private(pg_prev->pg),
1237 pg_prev->pg->index, pg_prev->off);
1238 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1239 (pg->flag & OBD_BRW_SRVLOCK));
1240 if (short_io_size != 0 && opc == OST_WRITE) {
1241 unsigned char *ptr = ll_kmap_atomic(pg->pg, KM_USER0);
1243 LASSERT(short_io_size >= requested_nob + pg->count);
1244 memcpy(short_io_buf + requested_nob,
1247 ll_kunmap_atomic(ptr, KM_USER0);
1248 } else if (short_io_size == 0) {
1249 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1252 requested_nob += pg->count;
1254 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1256 niobuf->rnb_len += pg->count;
1258 niobuf->rnb_offset = pg->off;
1259 niobuf->rnb_len = pg->count;
1260 niobuf->rnb_flags = pg->flag;
1265 LASSERTF((void *)(niobuf - niocount) ==
1266 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1267 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1268 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1270 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1272 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1273 body->oa.o_valid |= OBD_MD_FLFLAGS;
1274 body->oa.o_flags = 0;
1276 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1279 if (osc_should_shrink_grant(cli))
1280 osc_shrink_grant_local(cli, &body->oa);
1282 /* size[REQ_REC_OFF] still sizeof (*body) */
1283 if (opc == OST_WRITE) {
1284 if (cli->cl_checksum &&
1285 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1286 /* store cl_cksum_type in a local variable since
1287 * it can be changed via lprocfs */
1288 enum cksum_types cksum_type = cli->cl_cksum_type;
1290 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1291 body->oa.o_flags = 0;
1293 body->oa.o_flags |= cksum_type_pack(cksum_type);
1294 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1296 rc = osc_checksum_bulk(requested_nob, page_count,
1297 pga, OST_WRITE, cksum_type,
1300 CDEBUG(D_PAGE, "failed to checksum, rc = %d\n",
1304 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1307 /* save this in 'oa', too, for later checking */
1308 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1309 oa->o_flags |= cksum_type_pack(cksum_type);
1311 /* clear out the checksum flag, in case this is a
1312 * resend but cl_checksum is no longer set. b=11238 */
1313 oa->o_valid &= ~OBD_MD_FLCKSUM;
1315 oa->o_cksum = body->oa.o_cksum;
1316 /* 1 RC per niobuf */
1317 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1318 sizeof(__u32) * niocount);
1320 if (cli->cl_checksum &&
1321 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1322 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1323 body->oa.o_flags = 0;
1324 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1325 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1328 /* Client cksum has been already copied to wire obdo in previous
1329 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1330 * resent due to cksum error, this will allow Server to
1331 * check+dump pages on its side */
1333 ptlrpc_request_set_replen(req);
1335 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1336 aa = ptlrpc_req_async_args(req);
1338 aa->aa_requested_nob = requested_nob;
1339 aa->aa_nio_count = niocount;
1340 aa->aa_page_count = page_count;
1344 INIT_LIST_HEAD(&aa->aa_oaps);
1347 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1348 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1349 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1350 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1354 ptlrpc_req_finished(req);
1358 char dbgcksum_file_name[PATH_MAX];
1360 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1361 struct brw_page **pga, __u32 server_cksum,
1369 /* will only keep dump of pages on first error for the same range in
1370 * file/fid, not during the resends/retries. */
1371 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1372 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1373 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1374 libcfs_debug_file_path_arr :
1375 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1376 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1377 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1378 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1380 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1381 client_cksum, server_cksum);
1382 filp = filp_open(dbgcksum_file_name,
1383 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1387 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1388 "checksum error: rc = %d\n", dbgcksum_file_name,
1391 CERROR("%s: can't open to dump pages with checksum "
1392 "error: rc = %d\n", dbgcksum_file_name, rc);
1396 for (i = 0; i < page_count; i++) {
1397 len = pga[i]->count;
1398 buf = kmap(pga[i]->pg);
1400 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1402 CERROR("%s: wanted to write %u but got %d "
1403 "error\n", dbgcksum_file_name, len, rc);
1408 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1409 dbgcksum_file_name, rc);
1414 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1416 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1417 filp_close(filp, NULL);
1422 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1423 __u32 client_cksum, __u32 server_cksum,
1424 struct osc_brw_async_args *aa)
1428 enum cksum_types cksum_type;
1431 if (server_cksum == client_cksum) {
1432 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1436 if (aa->aa_cli->cl_checksum_dump)
1437 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1438 server_cksum, client_cksum);
1440 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1442 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1443 aa->aa_ppga, OST_WRITE, cksum_type,
1447 msg = "failed to calculate the client write checksum";
1448 else if (cksum_type != cksum_type_unpack(aa->aa_oa->o_flags))
1449 msg = "the server did not use the checksum type specified in "
1450 "the original request - likely a protocol problem";
1451 else if (new_cksum == server_cksum)
1452 msg = "changed on the client after we checksummed it - "
1453 "likely false positive due to mmap IO (bug 11742)";
1454 else if (new_cksum == client_cksum)
1455 msg = "changed in transit before arrival at OST";
1457 msg = "changed in transit AND doesn't match the original - "
1458 "likely false positive due to mmap IO (bug 11742)";
1460 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1461 DFID " object "DOSTID" extent [%llu-%llu], original "
1462 "client csum %x (type %x), server csum %x (type %x),"
1463 " client csum now %x\n",
1464 aa->aa_cli->cl_import->imp_obd->obd_name,
1465 msg, libcfs_nid2str(peer->nid),
1466 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1467 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1468 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1469 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1470 aa->aa_ppga[aa->aa_page_count - 1]->off +
1471 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1472 client_cksum, cksum_type_unpack(aa->aa_oa->o_flags),
1473 server_cksum, cksum_type, new_cksum);
1477 /* Note rc enters this function as number of bytes transferred */
1478 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1480 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1481 const struct lnet_process_id *peer =
1482 &req->rq_import->imp_connection->c_peer;
1483 struct client_obd *cli = aa->aa_cli;
1484 struct ost_body *body;
1485 u32 client_cksum = 0;
1488 if (rc < 0 && rc != -EDQUOT) {
1489 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1493 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1494 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1496 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1500 /* set/clear over quota flag for a uid/gid/projid */
1501 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1502 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1503 unsigned qid[LL_MAXQUOTAS] = {
1504 body->oa.o_uid, body->oa.o_gid,
1505 body->oa.o_projid };
1506 CDEBUG(D_QUOTA, "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1507 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1508 body->oa.o_valid, body->oa.o_flags);
1509 osc_quota_setdq(cli, qid, body->oa.o_valid,
1513 osc_update_grant(cli, body);
1518 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1519 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1521 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1523 CERROR("Unexpected +ve rc %d\n", rc);
1527 if (req->rq_bulk != NULL &&
1528 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1531 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1532 check_write_checksum(&body->oa, peer, client_cksum,
1533 body->oa.o_cksum, aa))
1536 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1537 aa->aa_page_count, aa->aa_ppga);
1541 /* The rest of this function executes only for OST_READs */
1543 if (req->rq_bulk == NULL) {
1544 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1546 LASSERT(rc == req->rq_status);
1548 /* if unwrap_bulk failed, return -EAGAIN to retry */
1549 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1552 GOTO(out, rc = -EAGAIN);
1554 if (rc > aa->aa_requested_nob) {
1555 CERROR("Unexpected rc %d (%d requested)\n", rc,
1556 aa->aa_requested_nob);
1560 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1561 CERROR ("Unexpected rc %d (%d transferred)\n",
1562 rc, req->rq_bulk->bd_nob_transferred);
1566 if (req->rq_bulk == NULL) {
1568 int nob, pg_count, i = 0;
1571 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1572 pg_count = aa->aa_page_count;
1573 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1576 while (nob > 0 && pg_count > 0) {
1578 int count = aa->aa_ppga[i]->count > nob ?
1579 nob : aa->aa_ppga[i]->count;
1581 CDEBUG(D_CACHE, "page %p count %d\n",
1582 aa->aa_ppga[i]->pg, count);
1583 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1584 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1586 ll_kunmap_atomic((void *) ptr, KM_USER0);
1595 if (rc < aa->aa_requested_nob)
1596 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1598 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1599 static int cksum_counter;
1600 u32 server_cksum = body->oa.o_cksum;
1603 enum cksum_types cksum_type;
1605 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1606 body->oa.o_flags : 0);
1607 rc = osc_checksum_bulk(rc, aa->aa_page_count, aa->aa_ppga,
1608 OST_READ, cksum_type, &client_cksum);
1611 "failed to calculate checksum, rc = %d\n", rc);
1614 if (req->rq_bulk != NULL &&
1615 peer->nid != req->rq_bulk->bd_sender) {
1617 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1620 if (server_cksum != client_cksum) {
1621 struct ost_body *clbody;
1622 u32 page_count = aa->aa_page_count;
1624 clbody = req_capsule_client_get(&req->rq_pill,
1626 if (cli->cl_checksum_dump)
1627 dump_all_bulk_pages(&clbody->oa, page_count,
1628 aa->aa_ppga, server_cksum,
1631 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1632 "%s%s%s inode "DFID" object "DOSTID
1633 " extent [%llu-%llu], client %x, "
1634 "server %x, cksum_type %x\n",
1635 req->rq_import->imp_obd->obd_name,
1636 libcfs_nid2str(peer->nid),
1638 clbody->oa.o_valid & OBD_MD_FLFID ?
1639 clbody->oa.o_parent_seq : 0ULL,
1640 clbody->oa.o_valid & OBD_MD_FLFID ?
1641 clbody->oa.o_parent_oid : 0,
1642 clbody->oa.o_valid & OBD_MD_FLFID ?
1643 clbody->oa.o_parent_ver : 0,
1644 POSTID(&body->oa.o_oi),
1645 aa->aa_ppga[0]->off,
1646 aa->aa_ppga[page_count-1]->off +
1647 aa->aa_ppga[page_count-1]->count - 1,
1648 client_cksum, server_cksum,
1651 aa->aa_oa->o_cksum = client_cksum;
1655 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1658 } else if (unlikely(client_cksum)) {
1659 static int cksum_missed;
1662 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1663 CERROR("Checksum %u requested from %s but not sent\n",
1664 cksum_missed, libcfs_nid2str(peer->nid));
1670 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1671 aa->aa_oa, &body->oa);
1676 static int osc_brw_redo_request(struct ptlrpc_request *request,
1677 struct osc_brw_async_args *aa, int rc)
1679 struct ptlrpc_request *new_req;
1680 struct osc_brw_async_args *new_aa;
1681 struct osc_async_page *oap;
1684 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1685 "redo for recoverable error %d", rc);
1687 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1688 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1689 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1690 aa->aa_ppga, &new_req, 1);
1694 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1695 if (oap->oap_request != NULL) {
1696 LASSERTF(request == oap->oap_request,
1697 "request %p != oap_request %p\n",
1698 request, oap->oap_request);
1699 if (oap->oap_interrupted) {
1700 ptlrpc_req_finished(new_req);
1705 /* New request takes over pga and oaps from old request.
1706 * Note that copying a list_head doesn't work, need to move it... */
1708 new_req->rq_interpret_reply = request->rq_interpret_reply;
1709 new_req->rq_async_args = request->rq_async_args;
1710 new_req->rq_commit_cb = request->rq_commit_cb;
1711 /* cap resend delay to the current request timeout, this is similar to
1712 * what ptlrpc does (see after_reply()) */
1713 if (aa->aa_resends > new_req->rq_timeout)
1714 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1716 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1717 new_req->rq_generation_set = 1;
1718 new_req->rq_import_generation = request->rq_import_generation;
1720 new_aa = ptlrpc_req_async_args(new_req);
1722 INIT_LIST_HEAD(&new_aa->aa_oaps);
1723 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1724 INIT_LIST_HEAD(&new_aa->aa_exts);
1725 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1726 new_aa->aa_resends = aa->aa_resends;
1728 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1729 if (oap->oap_request) {
1730 ptlrpc_req_finished(oap->oap_request);
1731 oap->oap_request = ptlrpc_request_addref(new_req);
1735 /* XXX: This code will run into problem if we're going to support
1736 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1737 * and wait for all of them to be finished. We should inherit request
1738 * set from old request. */
1739 ptlrpcd_add_req(new_req);
1741 DEBUG_REQ(D_INFO, new_req, "new request");
1746 * ugh, we want disk allocation on the target to happen in offset order. we'll
1747 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1748 * fine for our small page arrays and doesn't require allocation. its an
1749 * insertion sort that swaps elements that are strides apart, shrinking the
1750 * stride down until its '1' and the array is sorted.
1752 static void sort_brw_pages(struct brw_page **array, int num)
1755 struct brw_page *tmp;
1759 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1764 for (i = stride ; i < num ; i++) {
1767 while (j >= stride && array[j - stride]->off > tmp->off) {
1768 array[j] = array[j - stride];
1773 } while (stride > 1);
1776 static void osc_release_ppga(struct brw_page **ppga, size_t count)
1778 LASSERT(ppga != NULL);
1779 OBD_FREE(ppga, sizeof(*ppga) * count);
1782 static int brw_interpret(const struct lu_env *env,
1783 struct ptlrpc_request *req, void *data, int rc)
1785 struct osc_brw_async_args *aa = data;
1786 struct osc_extent *ext;
1787 struct osc_extent *tmp;
1788 struct client_obd *cli = aa->aa_cli;
1789 unsigned long transferred = 0;
1792 rc = osc_brw_fini_request(req, rc);
1793 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1794 /* When server return -EINPROGRESS, client should always retry
1795 * regardless of the number of times the bulk was resent already. */
1796 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
1797 if (req->rq_import_generation !=
1798 req->rq_import->imp_generation) {
1799 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1800 ""DOSTID", rc = %d.\n",
1801 req->rq_import->imp_obd->obd_name,
1802 POSTID(&aa->aa_oa->o_oi), rc);
1803 } else if (rc == -EINPROGRESS ||
1804 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1805 rc = osc_brw_redo_request(req, aa, rc);
1807 CERROR("%s: too many resent retries for object: "
1808 "%llu:%llu, rc = %d.\n",
1809 req->rq_import->imp_obd->obd_name,
1810 POSTID(&aa->aa_oa->o_oi), rc);
1815 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1820 struct obdo *oa = aa->aa_oa;
1821 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1822 unsigned long valid = 0;
1823 struct cl_object *obj;
1824 struct osc_async_page *last;
1826 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
1827 obj = osc2cl(last->oap_obj);
1829 cl_object_attr_lock(obj);
1830 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1831 attr->cat_blocks = oa->o_blocks;
1832 valid |= CAT_BLOCKS;
1834 if (oa->o_valid & OBD_MD_FLMTIME) {
1835 attr->cat_mtime = oa->o_mtime;
1838 if (oa->o_valid & OBD_MD_FLATIME) {
1839 attr->cat_atime = oa->o_atime;
1842 if (oa->o_valid & OBD_MD_FLCTIME) {
1843 attr->cat_ctime = oa->o_ctime;
1847 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1848 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
1849 loff_t last_off = last->oap_count + last->oap_obj_off +
1852 /* Change file size if this is an out of quota or
1853 * direct IO write and it extends the file size */
1854 if (loi->loi_lvb.lvb_size < last_off) {
1855 attr->cat_size = last_off;
1858 /* Extend KMS if it's not a lockless write */
1859 if (loi->loi_kms < last_off &&
1860 oap2osc_page(last)->ops_srvlock == 0) {
1861 attr->cat_kms = last_off;
1867 cl_object_attr_update(env, obj, attr, valid);
1868 cl_object_attr_unlock(obj);
1870 OBDO_FREE(aa->aa_oa);
1872 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
1873 osc_inc_unstable_pages(req);
1875 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1876 list_del_init(&ext->oe_link);
1877 osc_extent_finish(env, ext, 1,
1878 rc && req->rq_no_delay ? -EWOULDBLOCK : rc);
1880 LASSERT(list_empty(&aa->aa_exts));
1881 LASSERT(list_empty(&aa->aa_oaps));
1883 transferred = (req->rq_bulk == NULL ? /* short io */
1884 aa->aa_requested_nob :
1885 req->rq_bulk->bd_nob_transferred);
1887 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1888 ptlrpc_lprocfs_brw(req, transferred);
1890 spin_lock(&cli->cl_loi_list_lock);
1891 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1892 * is called so we know whether to go to sync BRWs or wait for more
1893 * RPCs to complete */
1894 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1895 cli->cl_w_in_flight--;
1897 cli->cl_r_in_flight--;
1898 osc_wake_cache_waiters(cli);
1899 spin_unlock(&cli->cl_loi_list_lock);
1901 osc_io_unplug(env, cli, NULL);
1905 static void brw_commit(struct ptlrpc_request *req)
1907 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
1908 * this called via the rq_commit_cb, I need to ensure
1909 * osc_dec_unstable_pages is still called. Otherwise unstable
1910 * pages may be leaked. */
1911 spin_lock(&req->rq_lock);
1912 if (likely(req->rq_unstable)) {
1913 req->rq_unstable = 0;
1914 spin_unlock(&req->rq_lock);
1916 osc_dec_unstable_pages(req);
1918 req->rq_committed = 1;
1919 spin_unlock(&req->rq_lock);
1924 * Build an RPC by the list of extent @ext_list. The caller must ensure
1925 * that the total pages in this list are NOT over max pages per RPC.
1926 * Extents in the list must be in OES_RPC state.
1928 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
1929 struct list_head *ext_list, int cmd)
1931 struct ptlrpc_request *req = NULL;
1932 struct osc_extent *ext;
1933 struct brw_page **pga = NULL;
1934 struct osc_brw_async_args *aa = NULL;
1935 struct obdo *oa = NULL;
1936 struct osc_async_page *oap;
1937 struct osc_object *obj = NULL;
1938 struct cl_req_attr *crattr = NULL;
1939 loff_t starting_offset = OBD_OBJECT_EOF;
1940 loff_t ending_offset = 0;
1944 bool soft_sync = false;
1945 bool interrupted = false;
1946 bool ndelay = false;
1950 __u32 layout_version = 0;
1951 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1952 struct ost_body *body;
1954 LASSERT(!list_empty(ext_list));
1956 /* add pages into rpc_list to build BRW rpc */
1957 list_for_each_entry(ext, ext_list, oe_link) {
1958 LASSERT(ext->oe_state == OES_RPC);
1959 mem_tight |= ext->oe_memalloc;
1960 grant += ext->oe_grants;
1961 page_count += ext->oe_nr_pages;
1962 layout_version = MAX(layout_version, ext->oe_layout_version);
1967 soft_sync = osc_over_unstable_soft_limit(cli);
1969 mpflag = cfs_memory_pressure_get_and_set();
1971 OBD_ALLOC(pga, sizeof(*pga) * page_count);
1973 GOTO(out, rc = -ENOMEM);
1977 GOTO(out, rc = -ENOMEM);
1980 list_for_each_entry(ext, ext_list, oe_link) {
1981 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
1983 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
1985 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
1986 pga[i] = &oap->oap_brw_page;
1987 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
1990 list_add_tail(&oap->oap_rpc_item, &rpc_list);
1991 if (starting_offset == OBD_OBJECT_EOF ||
1992 starting_offset > oap->oap_obj_off)
1993 starting_offset = oap->oap_obj_off;
1995 LASSERT(oap->oap_page_off == 0);
1996 if (ending_offset < oap->oap_obj_off + oap->oap_count)
1997 ending_offset = oap->oap_obj_off +
2000 LASSERT(oap->oap_page_off + oap->oap_count ==
2002 if (oap->oap_interrupted)
2009 /* first page in the list */
2010 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
2012 crattr = &osc_env_info(env)->oti_req_attr;
2013 memset(crattr, 0, sizeof(*crattr));
2014 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2015 crattr->cra_flags = ~0ULL;
2016 crattr->cra_page = oap2cl_page(oap);
2017 crattr->cra_oa = oa;
2018 cl_req_attr_set(env, osc2cl(obj), crattr);
2020 if (cmd == OBD_BRW_WRITE) {
2021 oa->o_grant_used = grant;
2022 if (layout_version > 0) {
2023 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2024 PFID(&oa->o_oi.oi_fid), layout_version);
2026 oa->o_layout_version = layout_version;
2027 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2031 sort_brw_pages(pga, page_count);
2032 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2034 CERROR("prep_req failed: %d\n", rc);
2038 req->rq_commit_cb = brw_commit;
2039 req->rq_interpret_reply = brw_interpret;
2040 req->rq_memalloc = mem_tight != 0;
2041 oap->oap_request = ptlrpc_request_addref(req);
2042 if (interrupted && !req->rq_intr)
2043 ptlrpc_mark_interrupted(req);
2045 req->rq_no_resend = req->rq_no_delay = 1;
2046 /* probably set a shorter timeout value.
2047 * to handle ETIMEDOUT in brw_interpret() correctly. */
2048 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2051 /* Need to update the timestamps after the request is built in case
2052 * we race with setattr (locally or in queue at OST). If OST gets
2053 * later setattr before earlier BRW (as determined by the request xid),
2054 * the OST will not use BRW timestamps. Sadly, there is no obvious
2055 * way to do this in a single call. bug 10150 */
2056 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2057 crattr->cra_oa = &body->oa;
2058 crattr->cra_flags = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2059 cl_req_attr_set(env, osc2cl(obj), crattr);
2060 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2062 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2063 aa = ptlrpc_req_async_args(req);
2064 INIT_LIST_HEAD(&aa->aa_oaps);
2065 list_splice_init(&rpc_list, &aa->aa_oaps);
2066 INIT_LIST_HEAD(&aa->aa_exts);
2067 list_splice_init(ext_list, &aa->aa_exts);
2069 spin_lock(&cli->cl_loi_list_lock);
2070 starting_offset >>= PAGE_SHIFT;
2071 if (cmd == OBD_BRW_READ) {
2072 cli->cl_r_in_flight++;
2073 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2074 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2075 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2076 starting_offset + 1);
2078 cli->cl_w_in_flight++;
2079 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2080 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2081 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2082 starting_offset + 1);
2084 spin_unlock(&cli->cl_loi_list_lock);
2086 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
2087 page_count, aa, cli->cl_r_in_flight,
2088 cli->cl_w_in_flight);
2089 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2091 ptlrpcd_add_req(req);
2097 cfs_memory_pressure_restore(mpflag);
2100 LASSERT(req == NULL);
2105 OBD_FREE(pga, sizeof(*pga) * page_count);
2106 /* this should happen rarely and is pretty bad, it makes the
2107 * pending list not follow the dirty order */
2108 while (!list_empty(ext_list)) {
2109 ext = list_entry(ext_list->next, struct osc_extent,
2111 list_del_init(&ext->oe_link);
2112 osc_extent_finish(env, ext, 0, rc);
2118 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2122 LASSERT(lock != NULL);
2124 lock_res_and_lock(lock);
2126 if (lock->l_ast_data == NULL)
2127 lock->l_ast_data = data;
2128 if (lock->l_ast_data == data)
2131 unlock_res_and_lock(lock);
2136 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2137 void *cookie, struct lustre_handle *lockh,
2138 enum ldlm_mode mode, __u64 *flags, bool speculative,
2141 bool intent = *flags & LDLM_FL_HAS_INTENT;
2145 /* The request was created before ldlm_cli_enqueue call. */
2146 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2147 struct ldlm_reply *rep;
2149 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2150 LASSERT(rep != NULL);
2152 rep->lock_policy_res1 =
2153 ptlrpc_status_ntoh(rep->lock_policy_res1);
2154 if (rep->lock_policy_res1)
2155 errcode = rep->lock_policy_res1;
2157 *flags |= LDLM_FL_LVB_READY;
2158 } else if (errcode == ELDLM_OK) {
2159 *flags |= LDLM_FL_LVB_READY;
2162 /* Call the update callback. */
2163 rc = (*upcall)(cookie, lockh, errcode);
2165 /* release the reference taken in ldlm_cli_enqueue() */
2166 if (errcode == ELDLM_LOCK_MATCHED)
2168 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2169 ldlm_lock_decref(lockh, mode);
2174 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2175 struct osc_enqueue_args *aa, int rc)
2177 struct ldlm_lock *lock;
2178 struct lustre_handle *lockh = &aa->oa_lockh;
2179 enum ldlm_mode mode = aa->oa_mode;
2180 struct ost_lvb *lvb = aa->oa_lvb;
2181 __u32 lvb_len = sizeof(*lvb);
2186 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2188 lock = ldlm_handle2lock(lockh);
2189 LASSERTF(lock != NULL,
2190 "lockh %#llx, req %p, aa %p - client evicted?\n",
2191 lockh->cookie, req, aa);
2193 /* Take an additional reference so that a blocking AST that
2194 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2195 * to arrive after an upcall has been executed by
2196 * osc_enqueue_fini(). */
2197 ldlm_lock_addref(lockh, mode);
2199 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2200 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2202 /* Let CP AST to grant the lock first. */
2203 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2205 if (aa->oa_speculative) {
2206 LASSERT(aa->oa_lvb == NULL);
2207 LASSERT(aa->oa_flags == NULL);
2208 aa->oa_flags = &flags;
2211 /* Complete obtaining the lock procedure. */
2212 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2213 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2215 /* Complete osc stuff. */
2216 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2217 aa->oa_flags, aa->oa_speculative, rc);
2219 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2221 ldlm_lock_decref(lockh, mode);
2222 LDLM_LOCK_PUT(lock);
2226 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2228 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2229 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2230 * other synchronous requests, however keeping some locks and trying to obtain
2231 * others may take a considerable amount of time in a case of ost failure; and
2232 * when other sync requests do not get released lock from a client, the client
2233 * is evicted from the cluster -- such scenarious make the life difficult, so
2234 * release locks just after they are obtained. */
2235 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2236 __u64 *flags, union ldlm_policy_data *policy,
2237 struct ost_lvb *lvb, int kms_valid,
2238 osc_enqueue_upcall_f upcall, void *cookie,
2239 struct ldlm_enqueue_info *einfo,
2240 struct ptlrpc_request_set *rqset, int async,
2243 struct obd_device *obd = exp->exp_obd;
2244 struct lustre_handle lockh = { 0 };
2245 struct ptlrpc_request *req = NULL;
2246 int intent = *flags & LDLM_FL_HAS_INTENT;
2247 __u64 match_flags = *flags;
2248 enum ldlm_mode mode;
2252 /* Filesystem lock extents are extended to page boundaries so that
2253 * dealing with the page cache is a little smoother. */
2254 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2255 policy->l_extent.end |= ~PAGE_MASK;
2258 * kms is not valid when either object is completely fresh (so that no
2259 * locks are cached), or object was evicted. In the latter case cached
2260 * lock cannot be used, because it would prime inode state with
2261 * potentially stale LVB.
2266 /* Next, search for already existing extent locks that will cover us */
2267 /* If we're trying to read, we also search for an existing PW lock. The
2268 * VFS and page cache already protect us locally, so lots of readers/
2269 * writers can share a single PW lock.
2271 * There are problems with conversion deadlocks, so instead of
2272 * converting a read lock to a write lock, we'll just enqueue a new
2275 * At some point we should cancel the read lock instead of making them
2276 * send us a blocking callback, but there are problems with canceling
2277 * locks out from other users right now, too. */
2278 mode = einfo->ei_mode;
2279 if (einfo->ei_mode == LCK_PR)
2281 /* Normal lock requests must wait for the LVB to be ready before
2282 * matching a lock; speculative lock requests do not need to,
2283 * because they will not actually use the lock. */
2285 match_flags |= LDLM_FL_LVB_READY;
2287 match_flags |= LDLM_FL_BLOCK_GRANTED;
2288 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2289 einfo->ei_type, policy, mode, &lockh, 0);
2291 struct ldlm_lock *matched;
2293 if (*flags & LDLM_FL_TEST_LOCK)
2296 matched = ldlm_handle2lock(&lockh);
2298 /* This DLM lock request is speculative, and does not
2299 * have an associated IO request. Therefore if there
2300 * is already a DLM lock, it wll just inform the
2301 * caller to cancel the request for this stripe.*/
2302 lock_res_and_lock(matched);
2303 if (ldlm_extent_equal(&policy->l_extent,
2304 &matched->l_policy_data.l_extent))
2308 unlock_res_and_lock(matched);
2310 ldlm_lock_decref(&lockh, mode);
2311 LDLM_LOCK_PUT(matched);
2313 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2314 *flags |= LDLM_FL_LVB_READY;
2316 /* We already have a lock, and it's referenced. */
2317 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2319 ldlm_lock_decref(&lockh, mode);
2320 LDLM_LOCK_PUT(matched);
2323 ldlm_lock_decref(&lockh, mode);
2324 LDLM_LOCK_PUT(matched);
2329 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2333 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2334 &RQF_LDLM_ENQUEUE_LVB);
2338 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2340 ptlrpc_request_free(req);
2344 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2346 ptlrpc_request_set_replen(req);
2349 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2350 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2352 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2353 sizeof(*lvb), LVB_T_OST, &lockh, async);
2356 struct osc_enqueue_args *aa;
2357 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2358 aa = ptlrpc_req_async_args(req);
2360 aa->oa_mode = einfo->ei_mode;
2361 aa->oa_type = einfo->ei_type;
2362 lustre_handle_copy(&aa->oa_lockh, &lockh);
2363 aa->oa_upcall = upcall;
2364 aa->oa_cookie = cookie;
2365 aa->oa_speculative = speculative;
2367 aa->oa_flags = flags;
2370 /* speculative locks are essentially to enqueue
2371 * a DLM lock in advance, so we don't care
2372 * about the result of the enqueue. */
2374 aa->oa_flags = NULL;
2377 req->rq_interpret_reply =
2378 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2379 if (rqset == PTLRPCD_SET)
2380 ptlrpcd_add_req(req);
2382 ptlrpc_set_add_req(rqset, req);
2383 } else if (intent) {
2384 ptlrpc_req_finished(req);
2389 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2390 flags, speculative, rc);
2392 ptlrpc_req_finished(req);
2397 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2398 enum ldlm_type type, union ldlm_policy_data *policy,
2399 enum ldlm_mode mode, __u64 *flags, void *data,
2400 struct lustre_handle *lockh, int unref)
2402 struct obd_device *obd = exp->exp_obd;
2403 __u64 lflags = *flags;
2407 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2410 /* Filesystem lock extents are extended to page boundaries so that
2411 * dealing with the page cache is a little smoother */
2412 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2413 policy->l_extent.end |= ~PAGE_MASK;
2415 /* Next, search for already existing extent locks that will cover us */
2416 /* If we're trying to read, we also search for an existing PW lock. The
2417 * VFS and page cache already protect us locally, so lots of readers/
2418 * writers can share a single PW lock. */
2422 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2423 res_id, type, policy, rc, lockh, unref);
2424 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2428 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2430 LASSERT(lock != NULL);
2431 if (!osc_set_lock_data(lock, data)) {
2432 ldlm_lock_decref(lockh, rc);
2435 LDLM_LOCK_PUT(lock);
2440 static int osc_statfs_interpret(const struct lu_env *env,
2441 struct ptlrpc_request *req,
2442 struct osc_async_args *aa, int rc)
2444 struct obd_statfs *msfs;
2448 /* The request has in fact never been sent
2449 * due to issues at a higher level (LOV).
2450 * Exit immediately since the caller is
2451 * aware of the problem and takes care
2452 * of the clean up */
2455 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2456 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2462 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2464 GOTO(out, rc = -EPROTO);
2467 *aa->aa_oi->oi_osfs = *msfs;
2469 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2473 static int osc_statfs_async(struct obd_export *exp,
2474 struct obd_info *oinfo, time64_t max_age,
2475 struct ptlrpc_request_set *rqset)
2477 struct obd_device *obd = class_exp2obd(exp);
2478 struct ptlrpc_request *req;
2479 struct osc_async_args *aa;
2483 /* We could possibly pass max_age in the request (as an absolute
2484 * timestamp or a "seconds.usec ago") so the target can avoid doing
2485 * extra calls into the filesystem if that isn't necessary (e.g.
2486 * during mount that would help a bit). Having relative timestamps
2487 * is not so great if request processing is slow, while absolute
2488 * timestamps are not ideal because they need time synchronization. */
2489 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2493 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2495 ptlrpc_request_free(req);
2498 ptlrpc_request_set_replen(req);
2499 req->rq_request_portal = OST_CREATE_PORTAL;
2500 ptlrpc_at_set_req_timeout(req);
2502 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2503 /* procfs requests not want stat in wait for avoid deadlock */
2504 req->rq_no_resend = 1;
2505 req->rq_no_delay = 1;
2508 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2509 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2510 aa = ptlrpc_req_async_args(req);
2513 ptlrpc_set_add_req(rqset, req);
2517 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2518 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
2520 struct obd_device *obd = class_exp2obd(exp);
2521 struct obd_statfs *msfs;
2522 struct ptlrpc_request *req;
2523 struct obd_import *imp = NULL;
2527 /*Since the request might also come from lprocfs, so we need
2528 *sync this with client_disconnect_export Bug15684*/
2529 down_read(&obd->u.cli.cl_sem);
2530 if (obd->u.cli.cl_import)
2531 imp = class_import_get(obd->u.cli.cl_import);
2532 up_read(&obd->u.cli.cl_sem);
2536 /* We could possibly pass max_age in the request (as an absolute
2537 * timestamp or a "seconds.usec ago") so the target can avoid doing
2538 * extra calls into the filesystem if that isn't necessary (e.g.
2539 * during mount that would help a bit). Having relative timestamps
2540 * is not so great if request processing is slow, while absolute
2541 * timestamps are not ideal because they need time synchronization. */
2542 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2544 class_import_put(imp);
2549 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2551 ptlrpc_request_free(req);
2554 ptlrpc_request_set_replen(req);
2555 req->rq_request_portal = OST_CREATE_PORTAL;
2556 ptlrpc_at_set_req_timeout(req);
2558 if (flags & OBD_STATFS_NODELAY) {
2559 /* procfs requests not want stat in wait for avoid deadlock */
2560 req->rq_no_resend = 1;
2561 req->rq_no_delay = 1;
2564 rc = ptlrpc_queue_wait(req);
2568 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2570 GOTO(out, rc = -EPROTO);
2577 ptlrpc_req_finished(req);
2581 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2582 void *karg, void __user *uarg)
2584 struct obd_device *obd = exp->exp_obd;
2585 struct obd_ioctl_data *data = karg;
2589 if (!try_module_get(THIS_MODULE)) {
2590 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2591 module_name(THIS_MODULE));
2595 case OBD_IOC_CLIENT_RECOVER:
2596 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2597 data->ioc_inlbuf1, 0);
2601 case IOC_OSC_SET_ACTIVE:
2602 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2605 case OBD_IOC_PING_TARGET:
2606 err = ptlrpc_obd_ping(obd);
2609 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2610 cmd, current_comm());
2611 GOTO(out, err = -ENOTTY);
2614 module_put(THIS_MODULE);
2618 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2619 u32 keylen, void *key, u32 vallen, void *val,
2620 struct ptlrpc_request_set *set)
2622 struct ptlrpc_request *req;
2623 struct obd_device *obd = exp->exp_obd;
2624 struct obd_import *imp = class_exp2cliimp(exp);
2629 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2631 if (KEY_IS(KEY_CHECKSUM)) {
2632 if (vallen != sizeof(int))
2634 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2638 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2639 sptlrpc_conf_client_adapt(obd);
2643 if (KEY_IS(KEY_FLUSH_CTX)) {
2644 sptlrpc_import_flush_my_ctx(imp);
2648 if (KEY_IS(KEY_CACHE_SET)) {
2649 struct client_obd *cli = &obd->u.cli;
2651 LASSERT(cli->cl_cache == NULL); /* only once */
2652 cli->cl_cache = (struct cl_client_cache *)val;
2653 cl_cache_incref(cli->cl_cache);
2654 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2656 /* add this osc into entity list */
2657 LASSERT(list_empty(&cli->cl_lru_osc));
2658 spin_lock(&cli->cl_cache->ccc_lru_lock);
2659 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2660 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2665 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2666 struct client_obd *cli = &obd->u.cli;
2667 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2668 long target = *(long *)val;
2670 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2675 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2678 /* We pass all other commands directly to OST. Since nobody calls osc
2679 methods directly and everybody is supposed to go through LOV, we
2680 assume lov checked invalid values for us.
2681 The only recognised values so far are evict_by_nid and mds_conn.
2682 Even if something bad goes through, we'd get a -EINVAL from OST
2685 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2686 &RQF_OST_SET_GRANT_INFO :
2691 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2692 RCL_CLIENT, keylen);
2693 if (!KEY_IS(KEY_GRANT_SHRINK))
2694 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2695 RCL_CLIENT, vallen);
2696 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2698 ptlrpc_request_free(req);
2702 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2703 memcpy(tmp, key, keylen);
2704 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2707 memcpy(tmp, val, vallen);
2709 if (KEY_IS(KEY_GRANT_SHRINK)) {
2710 struct osc_grant_args *aa;
2713 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2714 aa = ptlrpc_req_async_args(req);
2717 ptlrpc_req_finished(req);
2720 *oa = ((struct ost_body *)val)->oa;
2722 req->rq_interpret_reply = osc_shrink_grant_interpret;
2725 ptlrpc_request_set_replen(req);
2726 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2727 LASSERT(set != NULL);
2728 ptlrpc_set_add_req(set, req);
2729 ptlrpc_check_set(NULL, set);
2731 ptlrpcd_add_req(req);
2736 EXPORT_SYMBOL(osc_set_info_async);
2738 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
2739 struct obd_device *obd, struct obd_uuid *cluuid,
2740 struct obd_connect_data *data, void *localdata)
2742 struct client_obd *cli = &obd->u.cli;
2744 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2748 spin_lock(&cli->cl_loi_list_lock);
2749 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2750 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM)
2751 grant += cli->cl_dirty_grant;
2753 grant += cli->cl_dirty_pages << PAGE_SHIFT;
2754 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
2755 lost_grant = cli->cl_lost_grant;
2756 cli->cl_lost_grant = 0;
2757 spin_unlock(&cli->cl_loi_list_lock);
2759 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
2760 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
2761 data->ocd_version, data->ocd_grant, lost_grant);
2766 EXPORT_SYMBOL(osc_reconnect);
2768 int osc_disconnect(struct obd_export *exp)
2770 struct obd_device *obd = class_exp2obd(exp);
2773 rc = client_disconnect_export(exp);
2775 * Initially we put del_shrink_grant before disconnect_export, but it
2776 * causes the following problem if setup (connect) and cleanup
2777 * (disconnect) are tangled together.
2778 * connect p1 disconnect p2
2779 * ptlrpc_connect_import
2780 * ............... class_manual_cleanup
2783 * ptlrpc_connect_interrupt
2785 * add this client to shrink list
2787 * Bang! pinger trigger the shrink.
2788 * So the osc should be disconnected from the shrink list, after we
2789 * are sure the import has been destroyed. BUG18662
2791 if (obd->u.cli.cl_import == NULL)
2792 osc_del_shrink_grant(&obd->u.cli);
2795 EXPORT_SYMBOL(osc_disconnect);
2797 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
2798 struct hlist_node *hnode, void *arg)
2800 struct lu_env *env = arg;
2801 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
2802 struct ldlm_lock *lock;
2803 struct osc_object *osc = NULL;
2807 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
2808 if (lock->l_ast_data != NULL && osc == NULL) {
2809 osc = lock->l_ast_data;
2810 cl_object_get(osc2cl(osc));
2813 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
2814 * by the 2nd round of ldlm_namespace_clean() call in
2815 * osc_import_event(). */
2816 ldlm_clear_cleaned(lock);
2821 osc_object_invalidate(env, osc);
2822 cl_object_put(env, osc2cl(osc));
2827 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
2829 static int osc_import_event(struct obd_device *obd,
2830 struct obd_import *imp,
2831 enum obd_import_event event)
2833 struct client_obd *cli;
2837 LASSERT(imp->imp_obd == obd);
2840 case IMP_EVENT_DISCON: {
2842 spin_lock(&cli->cl_loi_list_lock);
2843 cli->cl_avail_grant = 0;
2844 cli->cl_lost_grant = 0;
2845 spin_unlock(&cli->cl_loi_list_lock);
2848 case IMP_EVENT_INACTIVE: {
2849 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
2852 case IMP_EVENT_INVALIDATE: {
2853 struct ldlm_namespace *ns = obd->obd_namespace;
2857 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2859 env = cl_env_get(&refcheck);
2861 osc_io_unplug(env, &obd->u.cli, NULL);
2863 cfs_hash_for_each_nolock(ns->ns_rs_hash,
2864 osc_ldlm_resource_invalidate,
2866 cl_env_put(env, &refcheck);
2868 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2873 case IMP_EVENT_ACTIVE: {
2874 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
2877 case IMP_EVENT_OCD: {
2878 struct obd_connect_data *ocd = &imp->imp_connect_data;
2880 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
2881 osc_init_grant(&obd->u.cli, ocd);
2884 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
2885 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
2887 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
2890 case IMP_EVENT_DEACTIVATE: {
2891 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
2894 case IMP_EVENT_ACTIVATE: {
2895 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
2899 CERROR("Unknown import event %d\n", event);
2906 * Determine whether the lock can be canceled before replaying the lock
2907 * during recovery, see bug16774 for detailed information.
2909 * \retval zero the lock can't be canceled
2910 * \retval other ok to cancel
2912 static int osc_cancel_weight(struct ldlm_lock *lock)
2915 * Cancel all unused and granted extent lock.
2917 if (lock->l_resource->lr_type == LDLM_EXTENT &&
2918 lock->l_granted_mode == lock->l_req_mode &&
2919 osc_ldlm_weigh_ast(lock) == 0)
2925 static int brw_queue_work(const struct lu_env *env, void *data)
2927 struct client_obd *cli = data;
2929 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
2931 osc_io_unplug(env, cli, NULL);
2935 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
2937 struct client_obd *cli = &obd->u.cli;
2943 rc = ptlrpcd_addref();
2947 rc = client_obd_setup(obd, lcfg);
2949 GOTO(out_ptlrpcd, rc);
2952 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
2953 if (IS_ERR(handler))
2954 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2955 cli->cl_writeback_work = handler;
2957 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
2958 if (IS_ERR(handler))
2959 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2960 cli->cl_lru_work = handler;
2962 rc = osc_quota_setup(obd);
2964 GOTO(out_ptlrpcd_work, rc);
2966 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
2968 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
2972 if (cli->cl_writeback_work != NULL) {
2973 ptlrpcd_destroy_work(cli->cl_writeback_work);
2974 cli->cl_writeback_work = NULL;
2976 if (cli->cl_lru_work != NULL) {
2977 ptlrpcd_destroy_work(cli->cl_lru_work);
2978 cli->cl_lru_work = NULL;
2980 client_obd_cleanup(obd);
2985 EXPORT_SYMBOL(osc_setup_common);
2987 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2989 struct client_obd *cli = &obd->u.cli;
2990 struct obd_type *type;
2998 rc = osc_setup_common(obd, lcfg);
3002 #ifdef CONFIG_PROC_FS
3003 obd->obd_vars = lprocfs_osc_obd_vars;
3005 /* If this is true then both client (osc) and server (osp) are on the
3006 * same node. The osp layer if loaded first will register the osc proc
3007 * directory. In that case this obd_device will be attached its proc
3008 * tree to type->typ_procsym instead of obd->obd_type->typ_procroot.
3010 type = class_search_type(LUSTRE_OSP_NAME);
3011 if (type && type->typ_procsym) {
3012 obd->obd_proc_entry = lprocfs_register(obd->obd_name,
3014 obd->obd_vars, obd);
3015 if (IS_ERR(obd->obd_proc_entry)) {
3016 rc = PTR_ERR(obd->obd_proc_entry);
3017 CERROR("error %d setting up lprocfs for %s\n", rc,
3019 obd->obd_proc_entry = NULL;
3023 rc = lprocfs_obd_setup(obd, false);
3025 /* If the basic OSC proc tree construction succeeded then
3028 lproc_osc_attach_seqstat(obd);
3029 sptlrpc_lprocfs_cliobd_attach(obd);
3030 ptlrpc_lprocfs_register_obd(obd);
3034 * We try to control the total number of requests with a upper limit
3035 * osc_reqpool_maxreqcount. There might be some race which will cause
3036 * over-limit allocation, but it is fine.
3038 req_count = atomic_read(&osc_pool_req_count);
3039 if (req_count < osc_reqpool_maxreqcount) {
3040 adding = cli->cl_max_rpcs_in_flight + 2;
3041 if (req_count + adding > osc_reqpool_maxreqcount)
3042 adding = osc_reqpool_maxreqcount - req_count;
3044 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3045 atomic_add(added, &osc_pool_req_count);
3048 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
3049 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3051 spin_lock(&osc_shrink_lock);
3052 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3053 spin_unlock(&osc_shrink_lock);
3058 int osc_precleanup_common(struct obd_device *obd)
3060 struct client_obd *cli = &obd->u.cli;
3064 * for echo client, export may be on zombie list, wait for
3065 * zombie thread to cull it, because cli.cl_import will be
3066 * cleared in client_disconnect_export():
3067 * class_export_destroy() -> obd_cleanup() ->
3068 * echo_device_free() -> echo_client_cleanup() ->
3069 * obd_disconnect() -> osc_disconnect() ->
3070 * client_disconnect_export()
3072 obd_zombie_barrier();
3073 if (cli->cl_writeback_work) {
3074 ptlrpcd_destroy_work(cli->cl_writeback_work);
3075 cli->cl_writeback_work = NULL;
3078 if (cli->cl_lru_work) {
3079 ptlrpcd_destroy_work(cli->cl_lru_work);
3080 cli->cl_lru_work = NULL;
3083 obd_cleanup_client_import(obd);
3086 EXPORT_SYMBOL(osc_precleanup_common);
3088 static int osc_precleanup(struct obd_device *obd)
3092 osc_precleanup_common(obd);
3094 ptlrpc_lprocfs_unregister_obd(obd);
3098 int osc_cleanup_common(struct obd_device *obd)
3100 struct client_obd *cli = &obd->u.cli;
3105 spin_lock(&osc_shrink_lock);
3106 list_del(&cli->cl_shrink_list);
3107 spin_unlock(&osc_shrink_lock);
3110 if (cli->cl_cache != NULL) {
3111 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3112 spin_lock(&cli->cl_cache->ccc_lru_lock);
3113 list_del_init(&cli->cl_lru_osc);
3114 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3115 cli->cl_lru_left = NULL;
3116 cl_cache_decref(cli->cl_cache);
3117 cli->cl_cache = NULL;
3120 /* free memory of osc quota cache */
3121 osc_quota_cleanup(obd);
3123 rc = client_obd_cleanup(obd);
3128 EXPORT_SYMBOL(osc_cleanup_common);
3130 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3132 int rc = class_process_proc_param(PARAM_OSC, obd->obd_vars, lcfg, obd);
3133 return rc > 0 ? 0: rc;
3136 static int osc_process_config(struct obd_device *obd, size_t len, void *buf)
3138 return osc_process_config_base(obd, buf);
3141 static struct obd_ops osc_obd_ops = {
3142 .o_owner = THIS_MODULE,
3143 .o_setup = osc_setup,
3144 .o_precleanup = osc_precleanup,
3145 .o_cleanup = osc_cleanup_common,
3146 .o_add_conn = client_import_add_conn,
3147 .o_del_conn = client_import_del_conn,
3148 .o_connect = client_connect_import,
3149 .o_reconnect = osc_reconnect,
3150 .o_disconnect = osc_disconnect,
3151 .o_statfs = osc_statfs,
3152 .o_statfs_async = osc_statfs_async,
3153 .o_create = osc_create,
3154 .o_destroy = osc_destroy,
3155 .o_getattr = osc_getattr,
3156 .o_setattr = osc_setattr,
3157 .o_iocontrol = osc_iocontrol,
3158 .o_set_info_async = osc_set_info_async,
3159 .o_import_event = osc_import_event,
3160 .o_process_config = osc_process_config,
3161 .o_quotactl = osc_quotactl,
3164 static struct shrinker *osc_cache_shrinker;
3165 struct list_head osc_shrink_list = LIST_HEAD_INIT(osc_shrink_list);
3166 DEFINE_SPINLOCK(osc_shrink_lock);
3168 #ifndef HAVE_SHRINKER_COUNT
3169 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3171 struct shrink_control scv = {
3172 .nr_to_scan = shrink_param(sc, nr_to_scan),
3173 .gfp_mask = shrink_param(sc, gfp_mask)
3175 #if !defined(HAVE_SHRINKER_WANT_SHRINK_PTR) && !defined(HAVE_SHRINK_CONTROL)
3176 struct shrinker *shrinker = NULL;
3179 (void)osc_cache_shrink_scan(shrinker, &scv);
3181 return osc_cache_shrink_count(shrinker, &scv);
3185 static int __init osc_init(void)
3187 bool enable_proc = true;
3188 struct obd_type *type;
3189 unsigned int reqpool_size;
3190 unsigned int reqsize;
3192 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3193 osc_cache_shrink_count, osc_cache_shrink_scan);
3196 /* print an address of _any_ initialized kernel symbol from this
3197 * module, to allow debugging with gdb that doesn't support data
3198 * symbols from modules.*/
3199 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3201 rc = lu_kmem_init(osc_caches);
3205 type = class_search_type(LUSTRE_OSP_NAME);
3206 if (type != NULL && type->typ_procsym != NULL)
3207 enable_proc = false;
3209 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
3210 LUSTRE_OSC_NAME, &osc_device_type);
3214 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3216 /* This is obviously too much memory, only prevent overflow here */
3217 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3218 GOTO(out_type, rc = -EINVAL);
3220 reqpool_size = osc_reqpool_mem_max << 20;
3223 while (reqsize < OST_IO_MAXREQSIZE)
3224 reqsize = reqsize << 1;
3227 * We don't enlarge the request count in OSC pool according to
3228 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3229 * tried after normal allocation failed. So a small OSC pool won't
3230 * cause much performance degression in most of cases.
3232 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3234 atomic_set(&osc_pool_req_count, 0);
3235 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3236 ptlrpc_add_rqs_to_pool);
3238 if (osc_rq_pool != NULL)
3242 class_unregister_type(LUSTRE_OSC_NAME);
3244 lu_kmem_fini(osc_caches);
3249 static void __exit osc_exit(void)
3251 remove_shrinker(osc_cache_shrinker);
3252 class_unregister_type(LUSTRE_OSC_NAME);
3253 lu_kmem_fini(osc_caches);
3254 ptlrpc_free_rq_pool(osc_rq_pool);
3257 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3258 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3259 MODULE_VERSION(LUSTRE_VERSION_STRING);
3260 MODULE_LICENSE("GPL");
3262 module_init(osc_init);
3263 module_exit(osc_exit);