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 obdo_to_ioobj(oa, ioobj);
1181 ioobj->ioo_bufcnt = niocount;
1182 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1183 * that might be send for this request. The actual number is decided
1184 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1185 * "max - 1" for old client compatibility sending "0", and also so the
1186 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1188 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1190 ioobj_max_brw_set(ioobj, 0);
1192 if (short_io_size != 0) {
1193 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1194 body->oa.o_valid |= OBD_MD_FLFLAGS;
1195 body->oa.o_flags = 0;
1197 body->oa.o_flags |= OBD_FL_SHORT_IO;
1198 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1200 if (opc == OST_WRITE) {
1201 short_io_buf = req_capsule_client_get(pill,
1203 LASSERT(short_io_buf != NULL);
1207 LASSERT(page_count > 0);
1209 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1210 struct brw_page *pg = pga[i];
1211 int poff = pg->off & ~PAGE_MASK;
1213 LASSERT(pg->count > 0);
1214 /* make sure there is no gap in the middle of page array */
1215 LASSERTF(page_count == 1 ||
1216 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1217 ergo(i > 0 && i < page_count - 1,
1218 poff == 0 && pg->count == PAGE_SIZE) &&
1219 ergo(i == page_count - 1, poff == 0)),
1220 "i: %d/%d pg: %p off: %llu, count: %u\n",
1221 i, page_count, pg, pg->off, pg->count);
1222 LASSERTF(i == 0 || pg->off > pg_prev->off,
1223 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1224 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1226 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1227 pg_prev->pg, page_private(pg_prev->pg),
1228 pg_prev->pg->index, pg_prev->off);
1229 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1230 (pg->flag & OBD_BRW_SRVLOCK));
1231 if (short_io_size != 0 && opc == OST_WRITE) {
1232 unsigned char *ptr = ll_kmap_atomic(pg->pg, KM_USER0);
1234 LASSERT(short_io_size >= requested_nob + pg->count);
1235 memcpy(short_io_buf + requested_nob,
1238 ll_kunmap_atomic(ptr, KM_USER0);
1239 } else if (short_io_size == 0) {
1240 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1243 requested_nob += pg->count;
1245 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1247 niobuf->rnb_len += pg->count;
1249 niobuf->rnb_offset = pg->off;
1250 niobuf->rnb_len = pg->count;
1251 niobuf->rnb_flags = pg->flag;
1256 LASSERTF((void *)(niobuf - niocount) ==
1257 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1258 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1259 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1261 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1263 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1264 body->oa.o_valid |= OBD_MD_FLFLAGS;
1265 body->oa.o_flags = 0;
1267 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1270 if (osc_should_shrink_grant(cli))
1271 osc_shrink_grant_local(cli, &body->oa);
1273 /* size[REQ_REC_OFF] still sizeof (*body) */
1274 if (opc == OST_WRITE) {
1275 if (cli->cl_checksum &&
1276 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1277 /* store cl_cksum_type in a local variable since
1278 * it can be changed via lprocfs */
1279 enum cksum_types cksum_type = cli->cl_cksum_type;
1281 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1282 body->oa.o_flags = 0;
1284 body->oa.o_flags |= cksum_type_pack(cksum_type);
1285 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1287 rc = osc_checksum_bulk(requested_nob, page_count,
1288 pga, OST_WRITE, cksum_type,
1291 CDEBUG(D_PAGE, "failed to checksum, rc = %d\n",
1295 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1298 /* save this in 'oa', too, for later checking */
1299 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1300 oa->o_flags |= cksum_type_pack(cksum_type);
1302 /* clear out the checksum flag, in case this is a
1303 * resend but cl_checksum is no longer set. b=11238 */
1304 oa->o_valid &= ~OBD_MD_FLCKSUM;
1306 oa->o_cksum = body->oa.o_cksum;
1307 /* 1 RC per niobuf */
1308 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1309 sizeof(__u32) * niocount);
1311 if (cli->cl_checksum &&
1312 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1313 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1314 body->oa.o_flags = 0;
1315 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1316 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1319 /* Client cksum has been already copied to wire obdo in previous
1320 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1321 * resent due to cksum error, this will allow Server to
1322 * check+dump pages on its side */
1324 ptlrpc_request_set_replen(req);
1326 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1327 aa = ptlrpc_req_async_args(req);
1329 aa->aa_requested_nob = requested_nob;
1330 aa->aa_nio_count = niocount;
1331 aa->aa_page_count = page_count;
1335 INIT_LIST_HEAD(&aa->aa_oaps);
1338 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1339 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1340 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1341 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1345 ptlrpc_req_finished(req);
1349 char dbgcksum_file_name[PATH_MAX];
1351 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1352 struct brw_page **pga, __u32 server_cksum,
1361 /* will only keep dump of pages on first error for the same range in
1362 * file/fid, not during the resends/retries. */
1363 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1364 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1365 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1366 libcfs_debug_file_path_arr :
1367 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1368 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1369 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1370 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1372 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1373 client_cksum, server_cksum);
1374 filp = filp_open(dbgcksum_file_name,
1375 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1379 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1380 "checksum error: rc = %d\n", dbgcksum_file_name,
1383 CERROR("%s: can't open to dump pages with checksum "
1384 "error: rc = %d\n", dbgcksum_file_name, rc);
1390 for (i = 0; i < page_count; i++) {
1391 len = pga[i]->count;
1392 buf = kmap(pga[i]->pg);
1394 rc = vfs_write(filp, (__force const char __user *)buf,
1397 CERROR("%s: wanted to write %u but got %d "
1398 "error\n", dbgcksum_file_name, len, rc);
1403 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1404 dbgcksum_file_name, rc);
1410 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1412 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1413 filp_close(filp, NULL);
1418 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1419 __u32 client_cksum, __u32 server_cksum,
1420 struct osc_brw_async_args *aa)
1424 enum cksum_types cksum_type;
1427 if (server_cksum == client_cksum) {
1428 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1432 if (aa->aa_cli->cl_checksum_dump)
1433 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1434 server_cksum, client_cksum);
1436 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1438 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1439 aa->aa_ppga, OST_WRITE, cksum_type,
1443 msg = "failed to calculate the client write checksum";
1444 else if (cksum_type != cksum_type_unpack(aa->aa_oa->o_flags))
1445 msg = "the server did not use the checksum type specified in "
1446 "the original request - likely a protocol problem";
1447 else if (new_cksum == server_cksum)
1448 msg = "changed on the client after we checksummed it - "
1449 "likely false positive due to mmap IO (bug 11742)";
1450 else if (new_cksum == client_cksum)
1451 msg = "changed in transit before arrival at OST";
1453 msg = "changed in transit AND doesn't match the original - "
1454 "likely false positive due to mmap IO (bug 11742)";
1456 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1457 DFID " object "DOSTID" extent [%llu-%llu], original "
1458 "client csum %x (type %x), server csum %x (type %x),"
1459 " client csum now %x\n",
1460 aa->aa_cli->cl_import->imp_obd->obd_name,
1461 msg, libcfs_nid2str(peer->nid),
1462 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1463 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1464 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1465 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1466 aa->aa_ppga[aa->aa_page_count - 1]->off +
1467 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1468 client_cksum, cksum_type_unpack(aa->aa_oa->o_flags),
1469 server_cksum, cksum_type, new_cksum);
1473 /* Note rc enters this function as number of bytes transferred */
1474 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1476 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1477 const struct lnet_process_id *peer =
1478 &req->rq_import->imp_connection->c_peer;
1479 struct client_obd *cli = aa->aa_cli;
1480 struct ost_body *body;
1481 u32 client_cksum = 0;
1484 if (rc < 0 && rc != -EDQUOT) {
1485 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1489 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1490 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1492 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1496 /* set/clear over quota flag for a uid/gid/projid */
1497 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1498 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1499 unsigned qid[LL_MAXQUOTAS] = {
1500 body->oa.o_uid, body->oa.o_gid,
1501 body->oa.o_projid };
1502 CDEBUG(D_QUOTA, "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1503 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1504 body->oa.o_valid, body->oa.o_flags);
1505 osc_quota_setdq(cli, qid, body->oa.o_valid,
1509 osc_update_grant(cli, body);
1514 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1515 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1517 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1519 CERROR("Unexpected +ve rc %d\n", rc);
1523 if (req->rq_bulk != NULL &&
1524 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1527 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1528 check_write_checksum(&body->oa, peer, client_cksum,
1529 body->oa.o_cksum, aa))
1532 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1533 aa->aa_page_count, aa->aa_ppga);
1537 /* The rest of this function executes only for OST_READs */
1539 if (req->rq_bulk == NULL) {
1540 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1542 LASSERT(rc == req->rq_status);
1544 /* if unwrap_bulk failed, return -EAGAIN to retry */
1545 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1548 GOTO(out, rc = -EAGAIN);
1550 if (rc > aa->aa_requested_nob) {
1551 CERROR("Unexpected rc %d (%d requested)\n", rc,
1552 aa->aa_requested_nob);
1556 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1557 CERROR ("Unexpected rc %d (%d transferred)\n",
1558 rc, req->rq_bulk->bd_nob_transferred);
1562 if (req->rq_bulk == NULL) {
1564 int nob, pg_count, i = 0;
1567 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1568 pg_count = aa->aa_page_count;
1569 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1572 while (nob > 0 && pg_count > 0) {
1574 int count = aa->aa_ppga[i]->count > nob ?
1575 nob : aa->aa_ppga[i]->count;
1577 CDEBUG(D_CACHE, "page %p count %d\n",
1578 aa->aa_ppga[i]->pg, count);
1579 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1580 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1582 ll_kunmap_atomic((void *) ptr, KM_USER0);
1591 if (rc < aa->aa_requested_nob)
1592 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1594 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1595 static int cksum_counter;
1596 u32 server_cksum = body->oa.o_cksum;
1599 enum cksum_types cksum_type;
1601 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1602 body->oa.o_flags : 0);
1603 rc = osc_checksum_bulk(rc, aa->aa_page_count, aa->aa_ppga,
1604 OST_READ, cksum_type, &client_cksum);
1607 "failed to calculate checksum, rc = %d\n", rc);
1610 if (req->rq_bulk != NULL &&
1611 peer->nid != req->rq_bulk->bd_sender) {
1613 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1616 if (server_cksum != client_cksum) {
1617 struct ost_body *clbody;
1618 u32 page_count = aa->aa_page_count;
1620 clbody = req_capsule_client_get(&req->rq_pill,
1622 if (cli->cl_checksum_dump)
1623 dump_all_bulk_pages(&clbody->oa, page_count,
1624 aa->aa_ppga, server_cksum,
1627 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1628 "%s%s%s inode "DFID" object "DOSTID
1629 " extent [%llu-%llu], client %x, "
1630 "server %x, cksum_type %x\n",
1631 req->rq_import->imp_obd->obd_name,
1632 libcfs_nid2str(peer->nid),
1634 clbody->oa.o_valid & OBD_MD_FLFID ?
1635 clbody->oa.o_parent_seq : 0ULL,
1636 clbody->oa.o_valid & OBD_MD_FLFID ?
1637 clbody->oa.o_parent_oid : 0,
1638 clbody->oa.o_valid & OBD_MD_FLFID ?
1639 clbody->oa.o_parent_ver : 0,
1640 POSTID(&body->oa.o_oi),
1641 aa->aa_ppga[0]->off,
1642 aa->aa_ppga[page_count-1]->off +
1643 aa->aa_ppga[page_count-1]->count - 1,
1644 client_cksum, server_cksum,
1647 aa->aa_oa->o_cksum = client_cksum;
1651 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1654 } else if (unlikely(client_cksum)) {
1655 static int cksum_missed;
1658 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1659 CERROR("Checksum %u requested from %s but not sent\n",
1660 cksum_missed, libcfs_nid2str(peer->nid));
1666 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1667 aa->aa_oa, &body->oa);
1672 static int osc_brw_redo_request(struct ptlrpc_request *request,
1673 struct osc_brw_async_args *aa, int rc)
1675 struct ptlrpc_request *new_req;
1676 struct osc_brw_async_args *new_aa;
1677 struct osc_async_page *oap;
1680 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1681 "redo for recoverable error %d", rc);
1683 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1684 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1685 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1686 aa->aa_ppga, &new_req, 1);
1690 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1691 if (oap->oap_request != NULL) {
1692 LASSERTF(request == oap->oap_request,
1693 "request %p != oap_request %p\n",
1694 request, oap->oap_request);
1695 if (oap->oap_interrupted) {
1696 ptlrpc_req_finished(new_req);
1701 /* New request takes over pga and oaps from old request.
1702 * Note that copying a list_head doesn't work, need to move it... */
1704 new_req->rq_interpret_reply = request->rq_interpret_reply;
1705 new_req->rq_async_args = request->rq_async_args;
1706 new_req->rq_commit_cb = request->rq_commit_cb;
1707 /* cap resend delay to the current request timeout, this is similar to
1708 * what ptlrpc does (see after_reply()) */
1709 if (aa->aa_resends > new_req->rq_timeout)
1710 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1712 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1713 new_req->rq_generation_set = 1;
1714 new_req->rq_import_generation = request->rq_import_generation;
1716 new_aa = ptlrpc_req_async_args(new_req);
1718 INIT_LIST_HEAD(&new_aa->aa_oaps);
1719 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1720 INIT_LIST_HEAD(&new_aa->aa_exts);
1721 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1722 new_aa->aa_resends = aa->aa_resends;
1724 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1725 if (oap->oap_request) {
1726 ptlrpc_req_finished(oap->oap_request);
1727 oap->oap_request = ptlrpc_request_addref(new_req);
1731 /* XXX: This code will run into problem if we're going to support
1732 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1733 * and wait for all of them to be finished. We should inherit request
1734 * set from old request. */
1735 ptlrpcd_add_req(new_req);
1737 DEBUG_REQ(D_INFO, new_req, "new request");
1742 * ugh, we want disk allocation on the target to happen in offset order. we'll
1743 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1744 * fine for our small page arrays and doesn't require allocation. its an
1745 * insertion sort that swaps elements that are strides apart, shrinking the
1746 * stride down until its '1' and the array is sorted.
1748 static void sort_brw_pages(struct brw_page **array, int num)
1751 struct brw_page *tmp;
1755 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1760 for (i = stride ; i < num ; i++) {
1763 while (j >= stride && array[j - stride]->off > tmp->off) {
1764 array[j] = array[j - stride];
1769 } while (stride > 1);
1772 static void osc_release_ppga(struct brw_page **ppga, size_t count)
1774 LASSERT(ppga != NULL);
1775 OBD_FREE(ppga, sizeof(*ppga) * count);
1778 static int brw_interpret(const struct lu_env *env,
1779 struct ptlrpc_request *req, void *data, int rc)
1781 struct osc_brw_async_args *aa = data;
1782 struct osc_extent *ext;
1783 struct osc_extent *tmp;
1784 struct client_obd *cli = aa->aa_cli;
1785 unsigned long transferred = 0;
1788 rc = osc_brw_fini_request(req, rc);
1789 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1790 /* When server return -EINPROGRESS, client should always retry
1791 * regardless of the number of times the bulk was resent already. */
1792 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
1793 if (req->rq_import_generation !=
1794 req->rq_import->imp_generation) {
1795 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1796 ""DOSTID", rc = %d.\n",
1797 req->rq_import->imp_obd->obd_name,
1798 POSTID(&aa->aa_oa->o_oi), rc);
1799 } else if (rc == -EINPROGRESS ||
1800 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1801 rc = osc_brw_redo_request(req, aa, rc);
1803 CERROR("%s: too many resent retries for object: "
1804 "%llu:%llu, rc = %d.\n",
1805 req->rq_import->imp_obd->obd_name,
1806 POSTID(&aa->aa_oa->o_oi), rc);
1811 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1816 struct obdo *oa = aa->aa_oa;
1817 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1818 unsigned long valid = 0;
1819 struct cl_object *obj;
1820 struct osc_async_page *last;
1822 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
1823 obj = osc2cl(last->oap_obj);
1825 cl_object_attr_lock(obj);
1826 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1827 attr->cat_blocks = oa->o_blocks;
1828 valid |= CAT_BLOCKS;
1830 if (oa->o_valid & OBD_MD_FLMTIME) {
1831 attr->cat_mtime = oa->o_mtime;
1834 if (oa->o_valid & OBD_MD_FLATIME) {
1835 attr->cat_atime = oa->o_atime;
1838 if (oa->o_valid & OBD_MD_FLCTIME) {
1839 attr->cat_ctime = oa->o_ctime;
1843 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1844 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
1845 loff_t last_off = last->oap_count + last->oap_obj_off +
1848 /* Change file size if this is an out of quota or
1849 * direct IO write and it extends the file size */
1850 if (loi->loi_lvb.lvb_size < last_off) {
1851 attr->cat_size = last_off;
1854 /* Extend KMS if it's not a lockless write */
1855 if (loi->loi_kms < last_off &&
1856 oap2osc_page(last)->ops_srvlock == 0) {
1857 attr->cat_kms = last_off;
1863 cl_object_attr_update(env, obj, attr, valid);
1864 cl_object_attr_unlock(obj);
1866 OBDO_FREE(aa->aa_oa);
1868 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
1869 osc_inc_unstable_pages(req);
1871 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1872 list_del_init(&ext->oe_link);
1873 osc_extent_finish(env, ext, 1,
1874 rc && req->rq_no_delay ? -EWOULDBLOCK : rc);
1876 LASSERT(list_empty(&aa->aa_exts));
1877 LASSERT(list_empty(&aa->aa_oaps));
1879 transferred = (req->rq_bulk == NULL ? /* short io */
1880 aa->aa_requested_nob :
1881 req->rq_bulk->bd_nob_transferred);
1883 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1884 ptlrpc_lprocfs_brw(req, transferred);
1886 spin_lock(&cli->cl_loi_list_lock);
1887 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1888 * is called so we know whether to go to sync BRWs or wait for more
1889 * RPCs to complete */
1890 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1891 cli->cl_w_in_flight--;
1893 cli->cl_r_in_flight--;
1894 osc_wake_cache_waiters(cli);
1895 spin_unlock(&cli->cl_loi_list_lock);
1897 osc_io_unplug(env, cli, NULL);
1901 static void brw_commit(struct ptlrpc_request *req)
1903 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
1904 * this called via the rq_commit_cb, I need to ensure
1905 * osc_dec_unstable_pages is still called. Otherwise unstable
1906 * pages may be leaked. */
1907 spin_lock(&req->rq_lock);
1908 if (likely(req->rq_unstable)) {
1909 req->rq_unstable = 0;
1910 spin_unlock(&req->rq_lock);
1912 osc_dec_unstable_pages(req);
1914 req->rq_committed = 1;
1915 spin_unlock(&req->rq_lock);
1920 * Build an RPC by the list of extent @ext_list. The caller must ensure
1921 * that the total pages in this list are NOT over max pages per RPC.
1922 * Extents in the list must be in OES_RPC state.
1924 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
1925 struct list_head *ext_list, int cmd)
1927 struct ptlrpc_request *req = NULL;
1928 struct osc_extent *ext;
1929 struct brw_page **pga = NULL;
1930 struct osc_brw_async_args *aa = NULL;
1931 struct obdo *oa = NULL;
1932 struct osc_async_page *oap;
1933 struct osc_object *obj = NULL;
1934 struct cl_req_attr *crattr = NULL;
1935 loff_t starting_offset = OBD_OBJECT_EOF;
1936 loff_t ending_offset = 0;
1940 bool soft_sync = false;
1941 bool interrupted = false;
1942 bool ndelay = false;
1946 __u32 layout_version = 0;
1947 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1948 struct ost_body *body;
1950 LASSERT(!list_empty(ext_list));
1952 /* add pages into rpc_list to build BRW rpc */
1953 list_for_each_entry(ext, ext_list, oe_link) {
1954 LASSERT(ext->oe_state == OES_RPC);
1955 mem_tight |= ext->oe_memalloc;
1956 grant += ext->oe_grants;
1957 page_count += ext->oe_nr_pages;
1958 layout_version = MAX(layout_version, ext->oe_layout_version);
1963 soft_sync = osc_over_unstable_soft_limit(cli);
1965 mpflag = cfs_memory_pressure_get_and_set();
1967 OBD_ALLOC(pga, sizeof(*pga) * page_count);
1969 GOTO(out, rc = -ENOMEM);
1973 GOTO(out, rc = -ENOMEM);
1976 list_for_each_entry(ext, ext_list, oe_link) {
1977 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
1979 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
1981 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
1982 pga[i] = &oap->oap_brw_page;
1983 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
1986 list_add_tail(&oap->oap_rpc_item, &rpc_list);
1987 if (starting_offset == OBD_OBJECT_EOF ||
1988 starting_offset > oap->oap_obj_off)
1989 starting_offset = oap->oap_obj_off;
1991 LASSERT(oap->oap_page_off == 0);
1992 if (ending_offset < oap->oap_obj_off + oap->oap_count)
1993 ending_offset = oap->oap_obj_off +
1996 LASSERT(oap->oap_page_off + oap->oap_count ==
1998 if (oap->oap_interrupted)
2005 /* first page in the list */
2006 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
2008 crattr = &osc_env_info(env)->oti_req_attr;
2009 memset(crattr, 0, sizeof(*crattr));
2010 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2011 crattr->cra_flags = ~0ULL;
2012 crattr->cra_page = oap2cl_page(oap);
2013 crattr->cra_oa = oa;
2014 cl_req_attr_set(env, osc2cl(obj), crattr);
2016 if (cmd == OBD_BRW_WRITE) {
2017 oa->o_grant_used = grant;
2018 if (layout_version > 0) {
2019 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2020 PFID(&oa->o_oi.oi_fid), layout_version);
2022 oa->o_layout_version = layout_version;
2023 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2027 sort_brw_pages(pga, page_count);
2028 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2030 CERROR("prep_req failed: %d\n", rc);
2034 req->rq_commit_cb = brw_commit;
2035 req->rq_interpret_reply = brw_interpret;
2036 req->rq_memalloc = mem_tight != 0;
2037 oap->oap_request = ptlrpc_request_addref(req);
2038 if (interrupted && !req->rq_intr)
2039 ptlrpc_mark_interrupted(req);
2041 req->rq_no_resend = req->rq_no_delay = 1;
2042 /* probably set a shorter timeout value.
2043 * to handle ETIMEDOUT in brw_interpret() correctly. */
2044 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2047 /* Need to update the timestamps after the request is built in case
2048 * we race with setattr (locally or in queue at OST). If OST gets
2049 * later setattr before earlier BRW (as determined by the request xid),
2050 * the OST will not use BRW timestamps. Sadly, there is no obvious
2051 * way to do this in a single call. bug 10150 */
2052 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2053 crattr->cra_oa = &body->oa;
2054 crattr->cra_flags = OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME;
2055 cl_req_attr_set(env, osc2cl(obj), crattr);
2056 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2058 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2059 aa = ptlrpc_req_async_args(req);
2060 INIT_LIST_HEAD(&aa->aa_oaps);
2061 list_splice_init(&rpc_list, &aa->aa_oaps);
2062 INIT_LIST_HEAD(&aa->aa_exts);
2063 list_splice_init(ext_list, &aa->aa_exts);
2065 spin_lock(&cli->cl_loi_list_lock);
2066 starting_offset >>= PAGE_SHIFT;
2067 if (cmd == OBD_BRW_READ) {
2068 cli->cl_r_in_flight++;
2069 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2070 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2071 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2072 starting_offset + 1);
2074 cli->cl_w_in_flight++;
2075 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2076 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2077 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2078 starting_offset + 1);
2080 spin_unlock(&cli->cl_loi_list_lock);
2082 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
2083 page_count, aa, cli->cl_r_in_flight,
2084 cli->cl_w_in_flight);
2085 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2087 ptlrpcd_add_req(req);
2093 cfs_memory_pressure_restore(mpflag);
2096 LASSERT(req == NULL);
2101 OBD_FREE(pga, sizeof(*pga) * page_count);
2102 /* this should happen rarely and is pretty bad, it makes the
2103 * pending list not follow the dirty order */
2104 while (!list_empty(ext_list)) {
2105 ext = list_entry(ext_list->next, struct osc_extent,
2107 list_del_init(&ext->oe_link);
2108 osc_extent_finish(env, ext, 0, rc);
2114 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2118 LASSERT(lock != NULL);
2120 lock_res_and_lock(lock);
2122 if (lock->l_ast_data == NULL)
2123 lock->l_ast_data = data;
2124 if (lock->l_ast_data == data)
2127 unlock_res_and_lock(lock);
2132 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2133 void *cookie, struct lustre_handle *lockh,
2134 enum ldlm_mode mode, __u64 *flags, bool speculative,
2137 bool intent = *flags & LDLM_FL_HAS_INTENT;
2141 /* The request was created before ldlm_cli_enqueue call. */
2142 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2143 struct ldlm_reply *rep;
2145 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2146 LASSERT(rep != NULL);
2148 rep->lock_policy_res1 =
2149 ptlrpc_status_ntoh(rep->lock_policy_res1);
2150 if (rep->lock_policy_res1)
2151 errcode = rep->lock_policy_res1;
2153 *flags |= LDLM_FL_LVB_READY;
2154 } else if (errcode == ELDLM_OK) {
2155 *flags |= LDLM_FL_LVB_READY;
2158 /* Call the update callback. */
2159 rc = (*upcall)(cookie, lockh, errcode);
2161 /* release the reference taken in ldlm_cli_enqueue() */
2162 if (errcode == ELDLM_LOCK_MATCHED)
2164 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2165 ldlm_lock_decref(lockh, mode);
2170 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2171 struct osc_enqueue_args *aa, int rc)
2173 struct ldlm_lock *lock;
2174 struct lustre_handle *lockh = &aa->oa_lockh;
2175 enum ldlm_mode mode = aa->oa_mode;
2176 struct ost_lvb *lvb = aa->oa_lvb;
2177 __u32 lvb_len = sizeof(*lvb);
2182 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2184 lock = ldlm_handle2lock(lockh);
2185 LASSERTF(lock != NULL,
2186 "lockh %#llx, req %p, aa %p - client evicted?\n",
2187 lockh->cookie, req, aa);
2189 /* Take an additional reference so that a blocking AST that
2190 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2191 * to arrive after an upcall has been executed by
2192 * osc_enqueue_fini(). */
2193 ldlm_lock_addref(lockh, mode);
2195 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2196 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2198 /* Let CP AST to grant the lock first. */
2199 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2201 if (aa->oa_speculative) {
2202 LASSERT(aa->oa_lvb == NULL);
2203 LASSERT(aa->oa_flags == NULL);
2204 aa->oa_flags = &flags;
2207 /* Complete obtaining the lock procedure. */
2208 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2209 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2211 /* Complete osc stuff. */
2212 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2213 aa->oa_flags, aa->oa_speculative, rc);
2215 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2217 ldlm_lock_decref(lockh, mode);
2218 LDLM_LOCK_PUT(lock);
2222 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2224 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2225 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2226 * other synchronous requests, however keeping some locks and trying to obtain
2227 * others may take a considerable amount of time in a case of ost failure; and
2228 * when other sync requests do not get released lock from a client, the client
2229 * is evicted from the cluster -- such scenarious make the life difficult, so
2230 * release locks just after they are obtained. */
2231 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2232 __u64 *flags, union ldlm_policy_data *policy,
2233 struct ost_lvb *lvb, int kms_valid,
2234 osc_enqueue_upcall_f upcall, void *cookie,
2235 struct ldlm_enqueue_info *einfo,
2236 struct ptlrpc_request_set *rqset, int async,
2239 struct obd_device *obd = exp->exp_obd;
2240 struct lustre_handle lockh = { 0 };
2241 struct ptlrpc_request *req = NULL;
2242 int intent = *flags & LDLM_FL_HAS_INTENT;
2243 __u64 match_flags = *flags;
2244 enum ldlm_mode mode;
2248 /* Filesystem lock extents are extended to page boundaries so that
2249 * dealing with the page cache is a little smoother. */
2250 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2251 policy->l_extent.end |= ~PAGE_MASK;
2254 * kms is not valid when either object is completely fresh (so that no
2255 * locks are cached), or object was evicted. In the latter case cached
2256 * lock cannot be used, because it would prime inode state with
2257 * potentially stale LVB.
2262 /* Next, search for already existing extent locks that will cover us */
2263 /* If we're trying to read, we also search for an existing PW lock. The
2264 * VFS and page cache already protect us locally, so lots of readers/
2265 * writers can share a single PW lock.
2267 * There are problems with conversion deadlocks, so instead of
2268 * converting a read lock to a write lock, we'll just enqueue a new
2271 * At some point we should cancel the read lock instead of making them
2272 * send us a blocking callback, but there are problems with canceling
2273 * locks out from other users right now, too. */
2274 mode = einfo->ei_mode;
2275 if (einfo->ei_mode == LCK_PR)
2277 /* Normal lock requests must wait for the LVB to be ready before
2278 * matching a lock; speculative lock requests do not need to,
2279 * because they will not actually use the lock. */
2281 match_flags |= LDLM_FL_LVB_READY;
2283 match_flags |= LDLM_FL_BLOCK_GRANTED;
2284 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2285 einfo->ei_type, policy, mode, &lockh, 0);
2287 struct ldlm_lock *matched;
2289 if (*flags & LDLM_FL_TEST_LOCK)
2292 matched = ldlm_handle2lock(&lockh);
2294 /* This DLM lock request is speculative, and does not
2295 * have an associated IO request. Therefore if there
2296 * is already a DLM lock, it wll just inform the
2297 * caller to cancel the request for this stripe.*/
2298 lock_res_and_lock(matched);
2299 if (ldlm_extent_equal(&policy->l_extent,
2300 &matched->l_policy_data.l_extent))
2304 unlock_res_and_lock(matched);
2306 ldlm_lock_decref(&lockh, mode);
2307 LDLM_LOCK_PUT(matched);
2309 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2310 *flags |= LDLM_FL_LVB_READY;
2312 /* We already have a lock, and it's referenced. */
2313 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2315 ldlm_lock_decref(&lockh, mode);
2316 LDLM_LOCK_PUT(matched);
2319 ldlm_lock_decref(&lockh, mode);
2320 LDLM_LOCK_PUT(matched);
2325 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2329 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2330 &RQF_LDLM_ENQUEUE_LVB);
2334 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2336 ptlrpc_request_free(req);
2340 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2342 ptlrpc_request_set_replen(req);
2345 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2346 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2348 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2349 sizeof(*lvb), LVB_T_OST, &lockh, async);
2352 struct osc_enqueue_args *aa;
2353 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2354 aa = ptlrpc_req_async_args(req);
2356 aa->oa_mode = einfo->ei_mode;
2357 aa->oa_type = einfo->ei_type;
2358 lustre_handle_copy(&aa->oa_lockh, &lockh);
2359 aa->oa_upcall = upcall;
2360 aa->oa_cookie = cookie;
2361 aa->oa_speculative = speculative;
2363 aa->oa_flags = flags;
2366 /* speculative locks are essentially to enqueue
2367 * a DLM lock in advance, so we don't care
2368 * about the result of the enqueue. */
2370 aa->oa_flags = NULL;
2373 req->rq_interpret_reply =
2374 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2375 if (rqset == PTLRPCD_SET)
2376 ptlrpcd_add_req(req);
2378 ptlrpc_set_add_req(rqset, req);
2379 } else if (intent) {
2380 ptlrpc_req_finished(req);
2385 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2386 flags, speculative, rc);
2388 ptlrpc_req_finished(req);
2393 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2394 enum ldlm_type type, union ldlm_policy_data *policy,
2395 enum ldlm_mode mode, __u64 *flags, void *data,
2396 struct lustre_handle *lockh, int unref)
2398 struct obd_device *obd = exp->exp_obd;
2399 __u64 lflags = *flags;
2403 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2406 /* Filesystem lock extents are extended to page boundaries so that
2407 * dealing with the page cache is a little smoother */
2408 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2409 policy->l_extent.end |= ~PAGE_MASK;
2411 /* Next, search for already existing extent locks that will cover us */
2412 /* If we're trying to read, we also search for an existing PW lock. The
2413 * VFS and page cache already protect us locally, so lots of readers/
2414 * writers can share a single PW lock. */
2418 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2419 res_id, type, policy, rc, lockh, unref);
2420 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2424 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2426 LASSERT(lock != NULL);
2427 if (!osc_set_lock_data(lock, data)) {
2428 ldlm_lock_decref(lockh, rc);
2431 LDLM_LOCK_PUT(lock);
2436 static int osc_statfs_interpret(const struct lu_env *env,
2437 struct ptlrpc_request *req,
2438 struct osc_async_args *aa, int rc)
2440 struct obd_statfs *msfs;
2444 /* The request has in fact never been sent
2445 * due to issues at a higher level (LOV).
2446 * Exit immediately since the caller is
2447 * aware of the problem and takes care
2448 * of the clean up */
2451 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2452 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2458 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2460 GOTO(out, rc = -EPROTO);
2463 *aa->aa_oi->oi_osfs = *msfs;
2465 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2469 static int osc_statfs_async(struct obd_export *exp,
2470 struct obd_info *oinfo, time64_t max_age,
2471 struct ptlrpc_request_set *rqset)
2473 struct obd_device *obd = class_exp2obd(exp);
2474 struct ptlrpc_request *req;
2475 struct osc_async_args *aa;
2479 /* We could possibly pass max_age in the request (as an absolute
2480 * timestamp or a "seconds.usec ago") so the target can avoid doing
2481 * extra calls into the filesystem if that isn't necessary (e.g.
2482 * during mount that would help a bit). Having relative timestamps
2483 * is not so great if request processing is slow, while absolute
2484 * timestamps are not ideal because they need time synchronization. */
2485 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2489 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2491 ptlrpc_request_free(req);
2494 ptlrpc_request_set_replen(req);
2495 req->rq_request_portal = OST_CREATE_PORTAL;
2496 ptlrpc_at_set_req_timeout(req);
2498 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2499 /* procfs requests not want stat in wait for avoid deadlock */
2500 req->rq_no_resend = 1;
2501 req->rq_no_delay = 1;
2504 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2505 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2506 aa = ptlrpc_req_async_args(req);
2509 ptlrpc_set_add_req(rqset, req);
2513 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2514 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
2516 struct obd_device *obd = class_exp2obd(exp);
2517 struct obd_statfs *msfs;
2518 struct ptlrpc_request *req;
2519 struct obd_import *imp = NULL;
2523 /*Since the request might also come from lprocfs, so we need
2524 *sync this with client_disconnect_export Bug15684*/
2525 down_read(&obd->u.cli.cl_sem);
2526 if (obd->u.cli.cl_import)
2527 imp = class_import_get(obd->u.cli.cl_import);
2528 up_read(&obd->u.cli.cl_sem);
2532 /* We could possibly pass max_age in the request (as an absolute
2533 * timestamp or a "seconds.usec ago") so the target can avoid doing
2534 * extra calls into the filesystem if that isn't necessary (e.g.
2535 * during mount that would help a bit). Having relative timestamps
2536 * is not so great if request processing is slow, while absolute
2537 * timestamps are not ideal because they need time synchronization. */
2538 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2540 class_import_put(imp);
2545 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2547 ptlrpc_request_free(req);
2550 ptlrpc_request_set_replen(req);
2551 req->rq_request_portal = OST_CREATE_PORTAL;
2552 ptlrpc_at_set_req_timeout(req);
2554 if (flags & OBD_STATFS_NODELAY) {
2555 /* procfs requests not want stat in wait for avoid deadlock */
2556 req->rq_no_resend = 1;
2557 req->rq_no_delay = 1;
2560 rc = ptlrpc_queue_wait(req);
2564 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2566 GOTO(out, rc = -EPROTO);
2573 ptlrpc_req_finished(req);
2577 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2578 void *karg, void __user *uarg)
2580 struct obd_device *obd = exp->exp_obd;
2581 struct obd_ioctl_data *data = karg;
2585 if (!try_module_get(THIS_MODULE)) {
2586 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2587 module_name(THIS_MODULE));
2591 case OBD_IOC_CLIENT_RECOVER:
2592 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2593 data->ioc_inlbuf1, 0);
2597 case IOC_OSC_SET_ACTIVE:
2598 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2601 case OBD_IOC_PING_TARGET:
2602 err = ptlrpc_obd_ping(obd);
2605 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2606 cmd, current_comm());
2607 GOTO(out, err = -ENOTTY);
2610 module_put(THIS_MODULE);
2614 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2615 u32 keylen, void *key, u32 vallen, void *val,
2616 struct ptlrpc_request_set *set)
2618 struct ptlrpc_request *req;
2619 struct obd_device *obd = exp->exp_obd;
2620 struct obd_import *imp = class_exp2cliimp(exp);
2625 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2627 if (KEY_IS(KEY_CHECKSUM)) {
2628 if (vallen != sizeof(int))
2630 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2634 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2635 sptlrpc_conf_client_adapt(obd);
2639 if (KEY_IS(KEY_FLUSH_CTX)) {
2640 sptlrpc_import_flush_my_ctx(imp);
2644 if (KEY_IS(KEY_CACHE_SET)) {
2645 struct client_obd *cli = &obd->u.cli;
2647 LASSERT(cli->cl_cache == NULL); /* only once */
2648 cli->cl_cache = (struct cl_client_cache *)val;
2649 cl_cache_incref(cli->cl_cache);
2650 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2652 /* add this osc into entity list */
2653 LASSERT(list_empty(&cli->cl_lru_osc));
2654 spin_lock(&cli->cl_cache->ccc_lru_lock);
2655 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2656 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2661 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2662 struct client_obd *cli = &obd->u.cli;
2663 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2664 long target = *(long *)val;
2666 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2671 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2674 /* We pass all other commands directly to OST. Since nobody calls osc
2675 methods directly and everybody is supposed to go through LOV, we
2676 assume lov checked invalid values for us.
2677 The only recognised values so far are evict_by_nid and mds_conn.
2678 Even if something bad goes through, we'd get a -EINVAL from OST
2681 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2682 &RQF_OST_SET_GRANT_INFO :
2687 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2688 RCL_CLIENT, keylen);
2689 if (!KEY_IS(KEY_GRANT_SHRINK))
2690 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2691 RCL_CLIENT, vallen);
2692 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2694 ptlrpc_request_free(req);
2698 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2699 memcpy(tmp, key, keylen);
2700 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2703 memcpy(tmp, val, vallen);
2705 if (KEY_IS(KEY_GRANT_SHRINK)) {
2706 struct osc_grant_args *aa;
2709 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2710 aa = ptlrpc_req_async_args(req);
2713 ptlrpc_req_finished(req);
2716 *oa = ((struct ost_body *)val)->oa;
2718 req->rq_interpret_reply = osc_shrink_grant_interpret;
2721 ptlrpc_request_set_replen(req);
2722 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2723 LASSERT(set != NULL);
2724 ptlrpc_set_add_req(set, req);
2725 ptlrpc_check_set(NULL, set);
2727 ptlrpcd_add_req(req);
2732 EXPORT_SYMBOL(osc_set_info_async);
2734 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
2735 struct obd_device *obd, struct obd_uuid *cluuid,
2736 struct obd_connect_data *data, void *localdata)
2738 struct client_obd *cli = &obd->u.cli;
2740 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2744 spin_lock(&cli->cl_loi_list_lock);
2745 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2746 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM)
2747 grant += cli->cl_dirty_grant;
2749 grant += cli->cl_dirty_pages << PAGE_SHIFT;
2750 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
2751 lost_grant = cli->cl_lost_grant;
2752 cli->cl_lost_grant = 0;
2753 spin_unlock(&cli->cl_loi_list_lock);
2755 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
2756 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
2757 data->ocd_version, data->ocd_grant, lost_grant);
2762 EXPORT_SYMBOL(osc_reconnect);
2764 int osc_disconnect(struct obd_export *exp)
2766 struct obd_device *obd = class_exp2obd(exp);
2769 rc = client_disconnect_export(exp);
2771 * Initially we put del_shrink_grant before disconnect_export, but it
2772 * causes the following problem if setup (connect) and cleanup
2773 * (disconnect) are tangled together.
2774 * connect p1 disconnect p2
2775 * ptlrpc_connect_import
2776 * ............... class_manual_cleanup
2779 * ptlrpc_connect_interrupt
2781 * add this client to shrink list
2783 * Bang! pinger trigger the shrink.
2784 * So the osc should be disconnected from the shrink list, after we
2785 * are sure the import has been destroyed. BUG18662
2787 if (obd->u.cli.cl_import == NULL)
2788 osc_del_shrink_grant(&obd->u.cli);
2791 EXPORT_SYMBOL(osc_disconnect);
2793 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
2794 struct hlist_node *hnode, void *arg)
2796 struct lu_env *env = arg;
2797 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
2798 struct ldlm_lock *lock;
2799 struct osc_object *osc = NULL;
2803 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
2804 if (lock->l_ast_data != NULL && osc == NULL) {
2805 osc = lock->l_ast_data;
2806 cl_object_get(osc2cl(osc));
2809 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
2810 * by the 2nd round of ldlm_namespace_clean() call in
2811 * osc_import_event(). */
2812 ldlm_clear_cleaned(lock);
2817 osc_object_invalidate(env, osc);
2818 cl_object_put(env, osc2cl(osc));
2823 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
2825 static int osc_import_event(struct obd_device *obd,
2826 struct obd_import *imp,
2827 enum obd_import_event event)
2829 struct client_obd *cli;
2833 LASSERT(imp->imp_obd == obd);
2836 case IMP_EVENT_DISCON: {
2838 spin_lock(&cli->cl_loi_list_lock);
2839 cli->cl_avail_grant = 0;
2840 cli->cl_lost_grant = 0;
2841 spin_unlock(&cli->cl_loi_list_lock);
2844 case IMP_EVENT_INACTIVE: {
2845 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
2848 case IMP_EVENT_INVALIDATE: {
2849 struct ldlm_namespace *ns = obd->obd_namespace;
2853 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2855 env = cl_env_get(&refcheck);
2857 osc_io_unplug(env, &obd->u.cli, NULL);
2859 cfs_hash_for_each_nolock(ns->ns_rs_hash,
2860 osc_ldlm_resource_invalidate,
2862 cl_env_put(env, &refcheck);
2864 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2869 case IMP_EVENT_ACTIVE: {
2870 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
2873 case IMP_EVENT_OCD: {
2874 struct obd_connect_data *ocd = &imp->imp_connect_data;
2876 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
2877 osc_init_grant(&obd->u.cli, ocd);
2880 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
2881 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
2883 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
2886 case IMP_EVENT_DEACTIVATE: {
2887 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
2890 case IMP_EVENT_ACTIVATE: {
2891 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
2895 CERROR("Unknown import event %d\n", event);
2902 * Determine whether the lock can be canceled before replaying the lock
2903 * during recovery, see bug16774 for detailed information.
2905 * \retval zero the lock can't be canceled
2906 * \retval other ok to cancel
2908 static int osc_cancel_weight(struct ldlm_lock *lock)
2911 * Cancel all unused and granted extent lock.
2913 if (lock->l_resource->lr_type == LDLM_EXTENT &&
2914 lock->l_granted_mode == lock->l_req_mode &&
2915 osc_ldlm_weigh_ast(lock) == 0)
2921 static int brw_queue_work(const struct lu_env *env, void *data)
2923 struct client_obd *cli = data;
2925 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
2927 osc_io_unplug(env, cli, NULL);
2931 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
2933 struct client_obd *cli = &obd->u.cli;
2939 rc = ptlrpcd_addref();
2943 rc = client_obd_setup(obd, lcfg);
2945 GOTO(out_ptlrpcd, rc);
2948 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
2949 if (IS_ERR(handler))
2950 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2951 cli->cl_writeback_work = handler;
2953 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
2954 if (IS_ERR(handler))
2955 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
2956 cli->cl_lru_work = handler;
2958 rc = osc_quota_setup(obd);
2960 GOTO(out_ptlrpcd_work, rc);
2962 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
2964 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
2968 if (cli->cl_writeback_work != NULL) {
2969 ptlrpcd_destroy_work(cli->cl_writeback_work);
2970 cli->cl_writeback_work = NULL;
2972 if (cli->cl_lru_work != NULL) {
2973 ptlrpcd_destroy_work(cli->cl_lru_work);
2974 cli->cl_lru_work = NULL;
2976 client_obd_cleanup(obd);
2981 EXPORT_SYMBOL(osc_setup_common);
2983 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
2985 struct client_obd *cli = &obd->u.cli;
2986 struct obd_type *type;
2994 rc = osc_setup_common(obd, lcfg);
2998 #ifdef CONFIG_PROC_FS
2999 obd->obd_vars = lprocfs_osc_obd_vars;
3001 /* If this is true then both client (osc) and server (osp) are on the
3002 * same node. The osp layer if loaded first will register the osc proc
3003 * directory. In that case this obd_device will be attached its proc
3004 * tree to type->typ_procsym instead of obd->obd_type->typ_procroot.
3006 type = class_search_type(LUSTRE_OSP_NAME);
3007 if (type && type->typ_procsym) {
3008 obd->obd_proc_entry = lprocfs_register(obd->obd_name,
3010 obd->obd_vars, obd);
3011 if (IS_ERR(obd->obd_proc_entry)) {
3012 rc = PTR_ERR(obd->obd_proc_entry);
3013 CERROR("error %d setting up lprocfs for %s\n", rc,
3015 obd->obd_proc_entry = NULL;
3019 rc = lprocfs_obd_setup(obd, false);
3021 /* If the basic OSC proc tree construction succeeded then
3024 lproc_osc_attach_seqstat(obd);
3025 sptlrpc_lprocfs_cliobd_attach(obd);
3026 ptlrpc_lprocfs_register_obd(obd);
3030 * We try to control the total number of requests with a upper limit
3031 * osc_reqpool_maxreqcount. There might be some race which will cause
3032 * over-limit allocation, but it is fine.
3034 req_count = atomic_read(&osc_pool_req_count);
3035 if (req_count < osc_reqpool_maxreqcount) {
3036 adding = cli->cl_max_rpcs_in_flight + 2;
3037 if (req_count + adding > osc_reqpool_maxreqcount)
3038 adding = osc_reqpool_maxreqcount - req_count;
3040 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3041 atomic_add(added, &osc_pool_req_count);
3044 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
3045 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3047 spin_lock(&osc_shrink_lock);
3048 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3049 spin_unlock(&osc_shrink_lock);
3054 int osc_precleanup_common(struct obd_device *obd)
3056 struct client_obd *cli = &obd->u.cli;
3060 * for echo client, export may be on zombie list, wait for
3061 * zombie thread to cull it, because cli.cl_import will be
3062 * cleared in client_disconnect_export():
3063 * class_export_destroy() -> obd_cleanup() ->
3064 * echo_device_free() -> echo_client_cleanup() ->
3065 * obd_disconnect() -> osc_disconnect() ->
3066 * client_disconnect_export()
3068 obd_zombie_barrier();
3069 if (cli->cl_writeback_work) {
3070 ptlrpcd_destroy_work(cli->cl_writeback_work);
3071 cli->cl_writeback_work = NULL;
3074 if (cli->cl_lru_work) {
3075 ptlrpcd_destroy_work(cli->cl_lru_work);
3076 cli->cl_lru_work = NULL;
3079 obd_cleanup_client_import(obd);
3082 EXPORT_SYMBOL(osc_precleanup_common);
3084 static int osc_precleanup(struct obd_device *obd)
3088 osc_precleanup_common(obd);
3090 ptlrpc_lprocfs_unregister_obd(obd);
3094 int osc_cleanup_common(struct obd_device *obd)
3096 struct client_obd *cli = &obd->u.cli;
3101 spin_lock(&osc_shrink_lock);
3102 list_del(&cli->cl_shrink_list);
3103 spin_unlock(&osc_shrink_lock);
3106 if (cli->cl_cache != NULL) {
3107 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3108 spin_lock(&cli->cl_cache->ccc_lru_lock);
3109 list_del_init(&cli->cl_lru_osc);
3110 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3111 cli->cl_lru_left = NULL;
3112 cl_cache_decref(cli->cl_cache);
3113 cli->cl_cache = NULL;
3116 /* free memory of osc quota cache */
3117 osc_quota_cleanup(obd);
3119 rc = client_obd_cleanup(obd);
3124 EXPORT_SYMBOL(osc_cleanup_common);
3126 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3128 int rc = class_process_proc_param(PARAM_OSC, obd->obd_vars, lcfg, obd);
3129 return rc > 0 ? 0: rc;
3132 static int osc_process_config(struct obd_device *obd, size_t len, void *buf)
3134 return osc_process_config_base(obd, buf);
3137 static struct obd_ops osc_obd_ops = {
3138 .o_owner = THIS_MODULE,
3139 .o_setup = osc_setup,
3140 .o_precleanup = osc_precleanup,
3141 .o_cleanup = osc_cleanup_common,
3142 .o_add_conn = client_import_add_conn,
3143 .o_del_conn = client_import_del_conn,
3144 .o_connect = client_connect_import,
3145 .o_reconnect = osc_reconnect,
3146 .o_disconnect = osc_disconnect,
3147 .o_statfs = osc_statfs,
3148 .o_statfs_async = osc_statfs_async,
3149 .o_create = osc_create,
3150 .o_destroy = osc_destroy,
3151 .o_getattr = osc_getattr,
3152 .o_setattr = osc_setattr,
3153 .o_iocontrol = osc_iocontrol,
3154 .o_set_info_async = osc_set_info_async,
3155 .o_import_event = osc_import_event,
3156 .o_process_config = osc_process_config,
3157 .o_quotactl = osc_quotactl,
3160 static struct shrinker *osc_cache_shrinker;
3161 struct list_head osc_shrink_list = LIST_HEAD_INIT(osc_shrink_list);
3162 DEFINE_SPINLOCK(osc_shrink_lock);
3164 #ifndef HAVE_SHRINKER_COUNT
3165 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3167 struct shrink_control scv = {
3168 .nr_to_scan = shrink_param(sc, nr_to_scan),
3169 .gfp_mask = shrink_param(sc, gfp_mask)
3171 #if !defined(HAVE_SHRINKER_WANT_SHRINK_PTR) && !defined(HAVE_SHRINK_CONTROL)
3172 struct shrinker *shrinker = NULL;
3175 (void)osc_cache_shrink_scan(shrinker, &scv);
3177 return osc_cache_shrink_count(shrinker, &scv);
3181 static int __init osc_init(void)
3183 bool enable_proc = true;
3184 struct obd_type *type;
3185 unsigned int reqpool_size;
3186 unsigned int reqsize;
3188 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3189 osc_cache_shrink_count, osc_cache_shrink_scan);
3192 /* print an address of _any_ initialized kernel symbol from this
3193 * module, to allow debugging with gdb that doesn't support data
3194 * symbols from modules.*/
3195 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3197 rc = lu_kmem_init(osc_caches);
3201 type = class_search_type(LUSTRE_OSP_NAME);
3202 if (type != NULL && type->typ_procsym != NULL)
3203 enable_proc = false;
3205 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
3206 LUSTRE_OSC_NAME, &osc_device_type);
3210 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3212 /* This is obviously too much memory, only prevent overflow here */
3213 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3214 GOTO(out_type, rc = -EINVAL);
3216 reqpool_size = osc_reqpool_mem_max << 20;
3219 while (reqsize < OST_IO_MAXREQSIZE)
3220 reqsize = reqsize << 1;
3223 * We don't enlarge the request count in OSC pool according to
3224 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3225 * tried after normal allocation failed. So a small OSC pool won't
3226 * cause much performance degression in most of cases.
3228 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3230 atomic_set(&osc_pool_req_count, 0);
3231 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3232 ptlrpc_add_rqs_to_pool);
3234 if (osc_rq_pool != NULL)
3238 class_unregister_type(LUSTRE_OSC_NAME);
3240 lu_kmem_fini(osc_caches);
3245 static void __exit osc_exit(void)
3247 remove_shrinker(osc_cache_shrinker);
3248 class_unregister_type(LUSTRE_OSC_NAME);
3249 lu_kmem_fini(osc_caches);
3250 ptlrpc_free_rq_pool(osc_rq_pool);
3253 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3254 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3255 MODULE_VERSION(LUSTRE_VERSION_STRING);
3256 MODULE_LICENSE("GPL");
3258 module_init(osc_init);
3259 module_exit(osc_exit);