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 <linux/workqueue.h>
36 #include <lprocfs_status.h>
37 #include <lustre_debug.h>
38 #include <lustre_dlm.h>
39 #include <lustre_fid.h>
40 #include <lustre_ha.h>
41 #include <uapi/linux/lustre/lustre_ioctl.h>
42 #include <lustre_net.h>
43 #include <lustre_obdo.h>
44 #include <uapi/linux/lustre/lustre_param.h>
46 #include <obd_cksum.h>
47 #include <obd_class.h>
48 #include <lustre_osc.h>
50 #include "osc_internal.h"
52 atomic_t osc_pool_req_count;
53 unsigned int osc_reqpool_maxreqcount;
54 struct ptlrpc_request_pool *osc_rq_pool;
56 /* max memory used for request pool, unit is MB */
57 static unsigned int osc_reqpool_mem_max = 5;
58 module_param(osc_reqpool_mem_max, uint, 0444);
60 static int osc_idle_timeout = 20;
61 module_param(osc_idle_timeout, uint, 0644);
63 #define osc_grant_args osc_brw_async_args
65 struct osc_setattr_args {
67 obd_enqueue_update_f sa_upcall;
71 struct osc_fsync_args {
72 struct osc_object *fa_obj;
74 obd_enqueue_update_f fa_upcall;
78 struct osc_ladvise_args {
80 obd_enqueue_update_f la_upcall;
84 static void osc_release_ppga(struct brw_page **ppga, size_t count);
85 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
88 void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
90 struct ost_body *body;
92 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
95 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
98 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
101 struct ptlrpc_request *req;
102 struct ost_body *body;
106 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
110 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
112 ptlrpc_request_free(req);
116 osc_pack_req_body(req, oa);
118 ptlrpc_request_set_replen(req);
120 rc = ptlrpc_queue_wait(req);
124 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
126 GOTO(out, rc = -EPROTO);
128 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
129 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
131 oa->o_blksize = cli_brw_size(exp->exp_obd);
132 oa->o_valid |= OBD_MD_FLBLKSZ;
136 ptlrpc_req_finished(req);
141 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
144 struct ptlrpc_request *req;
145 struct ost_body *body;
149 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
151 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
155 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
157 ptlrpc_request_free(req);
161 osc_pack_req_body(req, oa);
163 ptlrpc_request_set_replen(req);
165 rc = ptlrpc_queue_wait(req);
169 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
171 GOTO(out, rc = -EPROTO);
173 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
177 ptlrpc_req_finished(req);
182 static int osc_setattr_interpret(const struct lu_env *env,
183 struct ptlrpc_request *req, void *args, int rc)
185 struct osc_setattr_args *sa = args;
186 struct ost_body *body;
193 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
195 GOTO(out, rc = -EPROTO);
197 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
200 rc = sa->sa_upcall(sa->sa_cookie, rc);
204 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
205 obd_enqueue_update_f upcall, void *cookie,
206 struct ptlrpc_request_set *rqset)
208 struct ptlrpc_request *req;
209 struct osc_setattr_args *sa;
214 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
218 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
220 ptlrpc_request_free(req);
224 osc_pack_req_body(req, oa);
226 ptlrpc_request_set_replen(req);
228 /* do mds to ost setattr asynchronously */
230 /* Do not wait for response. */
231 ptlrpcd_add_req(req);
233 req->rq_interpret_reply = osc_setattr_interpret;
235 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
236 sa = ptlrpc_req_async_args(req);
238 sa->sa_upcall = upcall;
239 sa->sa_cookie = cookie;
241 if (rqset == PTLRPCD_SET)
242 ptlrpcd_add_req(req);
244 ptlrpc_set_add_req(rqset, req);
250 static int osc_ladvise_interpret(const struct lu_env *env,
251 struct ptlrpc_request *req,
254 struct osc_ladvise_args *la = arg;
255 struct ost_body *body;
261 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
263 GOTO(out, rc = -EPROTO);
265 *la->la_oa = body->oa;
267 rc = la->la_upcall(la->la_cookie, rc);
272 * If rqset is NULL, do not wait for response. Upcall and cookie could also
273 * be NULL in this case
275 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
276 struct ladvise_hdr *ladvise_hdr,
277 obd_enqueue_update_f upcall, void *cookie,
278 struct ptlrpc_request_set *rqset)
280 struct ptlrpc_request *req;
281 struct ost_body *body;
282 struct osc_ladvise_args *la;
284 struct lu_ladvise *req_ladvise;
285 struct lu_ladvise *ladvise = ladvise_hdr->lah_advise;
286 int num_advise = ladvise_hdr->lah_count;
287 struct ladvise_hdr *req_ladvise_hdr;
290 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_LADVISE);
294 req_capsule_set_size(&req->rq_pill, &RMF_OST_LADVISE, RCL_CLIENT,
295 num_advise * sizeof(*ladvise));
296 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_LADVISE);
298 ptlrpc_request_free(req);
301 req->rq_request_portal = OST_IO_PORTAL;
302 ptlrpc_at_set_req_timeout(req);
304 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
306 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
309 req_ladvise_hdr = req_capsule_client_get(&req->rq_pill,
310 &RMF_OST_LADVISE_HDR);
311 memcpy(req_ladvise_hdr, ladvise_hdr, sizeof(*ladvise_hdr));
313 req_ladvise = req_capsule_client_get(&req->rq_pill, &RMF_OST_LADVISE);
314 memcpy(req_ladvise, ladvise, sizeof(*ladvise) * num_advise);
315 ptlrpc_request_set_replen(req);
318 /* Do not wait for response. */
319 ptlrpcd_add_req(req);
323 req->rq_interpret_reply = osc_ladvise_interpret;
324 CLASSERT(sizeof(*la) <= sizeof(req->rq_async_args));
325 la = ptlrpc_req_async_args(req);
327 la->la_upcall = upcall;
328 la->la_cookie = cookie;
330 if (rqset == PTLRPCD_SET)
331 ptlrpcd_add_req(req);
333 ptlrpc_set_add_req(rqset, req);
338 static int osc_create(const struct lu_env *env, struct obd_export *exp,
341 struct ptlrpc_request *req;
342 struct ost_body *body;
347 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
348 LASSERT(fid_seq_is_echo(ostid_seq(&oa->o_oi)));
350 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
352 GOTO(out, rc = -ENOMEM);
354 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
356 ptlrpc_request_free(req);
360 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
363 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
365 ptlrpc_request_set_replen(req);
367 rc = ptlrpc_queue_wait(req);
371 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
373 GOTO(out_req, rc = -EPROTO);
375 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
376 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
378 oa->o_blksize = cli_brw_size(exp->exp_obd);
379 oa->o_valid |= OBD_MD_FLBLKSZ;
381 CDEBUG(D_HA, "transno: %lld\n",
382 lustre_msg_get_transno(req->rq_repmsg));
384 ptlrpc_req_finished(req);
389 int osc_punch_send(struct obd_export *exp, struct obdo *oa,
390 obd_enqueue_update_f upcall, void *cookie)
392 struct ptlrpc_request *req;
393 struct osc_setattr_args *sa;
394 struct obd_import *imp = class_exp2cliimp(exp);
395 struct ost_body *body;
400 req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
404 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
406 ptlrpc_request_free(req);
410 osc_set_io_portal(req);
412 ptlrpc_at_set_req_timeout(req);
414 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
416 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
418 ptlrpc_request_set_replen(req);
420 req->rq_interpret_reply = osc_setattr_interpret;
421 CLASSERT(sizeof(*sa) <= sizeof(req->rq_async_args));
422 sa = ptlrpc_req_async_args(req);
424 sa->sa_upcall = upcall;
425 sa->sa_cookie = cookie;
427 ptlrpcd_add_req(req);
431 EXPORT_SYMBOL(osc_punch_send);
433 static int osc_sync_interpret(const struct lu_env *env,
434 struct ptlrpc_request *req, void *args, int rc)
436 struct osc_fsync_args *fa = args;
437 struct ost_body *body;
438 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
439 unsigned long valid = 0;
440 struct cl_object *obj;
446 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
448 CERROR("can't unpack ost_body\n");
449 GOTO(out, rc = -EPROTO);
452 *fa->fa_oa = body->oa;
453 obj = osc2cl(fa->fa_obj);
455 /* Update osc object's blocks attribute */
456 cl_object_attr_lock(obj);
457 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
458 attr->cat_blocks = body->oa.o_blocks;
463 cl_object_attr_update(env, obj, attr, valid);
464 cl_object_attr_unlock(obj);
467 rc = fa->fa_upcall(fa->fa_cookie, rc);
471 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
472 obd_enqueue_update_f upcall, void *cookie,
473 struct ptlrpc_request_set *rqset)
475 struct obd_export *exp = osc_export(obj);
476 struct ptlrpc_request *req;
477 struct ost_body *body;
478 struct osc_fsync_args *fa;
482 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
486 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
488 ptlrpc_request_free(req);
492 /* overload the size and blocks fields in the oa with start/end */
493 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
495 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
497 ptlrpc_request_set_replen(req);
498 req->rq_interpret_reply = osc_sync_interpret;
500 CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
501 fa = ptlrpc_req_async_args(req);
504 fa->fa_upcall = upcall;
505 fa->fa_cookie = cookie;
507 if (rqset == PTLRPCD_SET)
508 ptlrpcd_add_req(req);
510 ptlrpc_set_add_req(rqset, req);
515 /* Find and cancel locally locks matched by @mode in the resource found by
516 * @objid. Found locks are added into @cancel list. Returns the amount of
517 * locks added to @cancels list. */
518 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
519 struct list_head *cancels,
520 enum ldlm_mode mode, __u64 lock_flags)
522 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
523 struct ldlm_res_id res_id;
524 struct ldlm_resource *res;
528 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
529 * export) but disabled through procfs (flag in NS).
531 * This distinguishes from a case when ELC is not supported originally,
532 * when we still want to cancel locks in advance and just cancel them
533 * locally, without sending any RPC. */
534 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
537 ostid_build_res_name(&oa->o_oi, &res_id);
538 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
542 LDLM_RESOURCE_ADDREF(res);
543 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
544 lock_flags, 0, NULL);
545 LDLM_RESOURCE_DELREF(res);
546 ldlm_resource_putref(res);
550 static int osc_destroy_interpret(const struct lu_env *env,
551 struct ptlrpc_request *req, void *args, int rc)
553 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
555 atomic_dec(&cli->cl_destroy_in_flight);
556 wake_up(&cli->cl_destroy_waitq);
561 static int osc_can_send_destroy(struct client_obd *cli)
563 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
564 cli->cl_max_rpcs_in_flight) {
565 /* The destroy request can be sent */
568 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
569 cli->cl_max_rpcs_in_flight) {
571 * The counter has been modified between the two atomic
574 wake_up(&cli->cl_destroy_waitq);
579 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
582 struct client_obd *cli = &exp->exp_obd->u.cli;
583 struct ptlrpc_request *req;
584 struct ost_body *body;
585 struct list_head cancels = LIST_HEAD_INIT(cancels);
590 CDEBUG(D_INFO, "oa NULL\n");
594 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
595 LDLM_FL_DISCARD_DATA);
597 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
599 ldlm_lock_list_put(&cancels, l_bl_ast, count);
603 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
606 ptlrpc_request_free(req);
610 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
611 ptlrpc_at_set_req_timeout(req);
613 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
615 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
617 ptlrpc_request_set_replen(req);
619 req->rq_interpret_reply = osc_destroy_interpret;
620 if (!osc_can_send_destroy(cli)) {
621 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
624 * Wait until the number of on-going destroy RPCs drops
625 * under max_rpc_in_flight
627 rc = l_wait_event_exclusive(cli->cl_destroy_waitq,
628 osc_can_send_destroy(cli), &lwi);
630 ptlrpc_req_finished(req);
635 /* Do not wait for response */
636 ptlrpcd_add_req(req);
640 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
643 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
645 LASSERT(!(oa->o_valid & bits));
648 spin_lock(&cli->cl_loi_list_lock);
649 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data, GRANT_PARAM))
650 oa->o_dirty = cli->cl_dirty_grant;
652 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
653 if (unlikely(cli->cl_dirty_pages - cli->cl_dirty_transit >
654 cli->cl_dirty_max_pages)) {
655 CERROR("dirty %lu - %lu > dirty_max %lu\n",
656 cli->cl_dirty_pages, cli->cl_dirty_transit,
657 cli->cl_dirty_max_pages);
659 } else if (unlikely(atomic_long_read(&obd_dirty_pages) -
660 atomic_long_read(&obd_dirty_transit_pages) >
661 (long)(obd_max_dirty_pages + 1))) {
662 /* The atomic_read() allowing the atomic_inc() are
663 * not covered by a lock thus they may safely race and trip
664 * this CERROR() unless we add in a small fudge factor (+1). */
665 CERROR("%s: dirty %ld - %ld > system dirty_max %ld\n",
666 cli_name(cli), atomic_long_read(&obd_dirty_pages),
667 atomic_long_read(&obd_dirty_transit_pages),
668 obd_max_dirty_pages);
670 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
672 CERROR("dirty %lu - dirty_max %lu too big???\n",
673 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
676 unsigned long nrpages;
677 unsigned long undirty;
679 nrpages = cli->cl_max_pages_per_rpc;
680 nrpages *= cli->cl_max_rpcs_in_flight + 1;
681 nrpages = max(nrpages, cli->cl_dirty_max_pages);
682 undirty = nrpages << PAGE_SHIFT;
683 if (OCD_HAS_FLAG(&cli->cl_import->imp_connect_data,
687 /* take extent tax into account when asking for more
689 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
690 cli->cl_max_extent_pages;
691 undirty += nrextents * cli->cl_grant_extent_tax;
693 /* Do not ask for more than OBD_MAX_GRANT - a margin for server
694 * to add extent tax, etc.
696 oa->o_undirty = min(undirty, OBD_MAX_GRANT -
697 (PTLRPC_MAX_BRW_PAGES << PAGE_SHIFT)*4UL);
699 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
700 oa->o_dropped = cli->cl_lost_grant;
701 cli->cl_lost_grant = 0;
702 spin_unlock(&cli->cl_loi_list_lock);
703 CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
704 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
707 void osc_update_next_shrink(struct client_obd *cli)
709 cli->cl_next_shrink_grant = ktime_get_seconds() +
710 cli->cl_grant_shrink_interval;
712 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
713 cli->cl_next_shrink_grant);
716 static void __osc_update_grant(struct client_obd *cli, u64 grant)
718 spin_lock(&cli->cl_loi_list_lock);
719 cli->cl_avail_grant += grant;
720 spin_unlock(&cli->cl_loi_list_lock);
723 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
725 if (body->oa.o_valid & OBD_MD_FLGRANT) {
726 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
727 __osc_update_grant(cli, body->oa.o_grant);
732 * grant thread data for shrinking space.
734 struct grant_thread_data {
735 struct list_head gtd_clients;
736 struct mutex gtd_mutex;
737 unsigned long gtd_stopped:1;
739 static struct grant_thread_data client_gtd;
741 static int osc_shrink_grant_interpret(const struct lu_env *env,
742 struct ptlrpc_request *req,
745 struct osc_grant_args *aa = args;
746 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
747 struct ost_body *body;
750 __osc_update_grant(cli, aa->aa_oa->o_grant);
754 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
756 osc_update_grant(cli, body);
758 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
763 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
765 spin_lock(&cli->cl_loi_list_lock);
766 oa->o_grant = cli->cl_avail_grant / 4;
767 cli->cl_avail_grant -= oa->o_grant;
768 spin_unlock(&cli->cl_loi_list_lock);
769 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
770 oa->o_valid |= OBD_MD_FLFLAGS;
773 oa->o_flags |= OBD_FL_SHRINK_GRANT;
774 osc_update_next_shrink(cli);
777 /* Shrink the current grant, either from some large amount to enough for a
778 * full set of in-flight RPCs, or if we have already shrunk to that limit
779 * then to enough for a single RPC. This avoids keeping more grant than
780 * needed, and avoids shrinking the grant piecemeal. */
781 static int osc_shrink_grant(struct client_obd *cli)
783 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
784 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
786 spin_lock(&cli->cl_loi_list_lock);
787 if (cli->cl_avail_grant <= target_bytes)
788 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
789 spin_unlock(&cli->cl_loi_list_lock);
791 return osc_shrink_grant_to_target(cli, target_bytes);
794 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
797 struct ost_body *body;
800 spin_lock(&cli->cl_loi_list_lock);
801 /* Don't shrink if we are already above or below the desired limit
802 * We don't want to shrink below a single RPC, as that will negatively
803 * impact block allocation and long-term performance. */
804 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
805 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
807 if (target_bytes >= cli->cl_avail_grant) {
808 spin_unlock(&cli->cl_loi_list_lock);
811 spin_unlock(&cli->cl_loi_list_lock);
817 osc_announce_cached(cli, &body->oa, 0);
819 spin_lock(&cli->cl_loi_list_lock);
820 if (target_bytes >= cli->cl_avail_grant) {
821 /* available grant has changed since target calculation */
822 spin_unlock(&cli->cl_loi_list_lock);
823 GOTO(out_free, rc = 0);
825 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
826 cli->cl_avail_grant = target_bytes;
827 spin_unlock(&cli->cl_loi_list_lock);
828 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
829 body->oa.o_valid |= OBD_MD_FLFLAGS;
830 body->oa.o_flags = 0;
832 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
833 osc_update_next_shrink(cli);
835 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
836 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
837 sizeof(*body), body, NULL);
839 __osc_update_grant(cli, body->oa.o_grant);
845 static int osc_should_shrink_grant(struct client_obd *client)
847 time64_t next_shrink = client->cl_next_shrink_grant;
849 if (client->cl_import == NULL)
852 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
853 OBD_CONNECT_GRANT_SHRINK) == 0)
856 if (ktime_get_seconds() >= next_shrink - 5) {
857 /* Get the current RPC size directly, instead of going via:
858 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
859 * Keep comment here so that it can be found by searching. */
860 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
862 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
863 client->cl_avail_grant > brw_size)
866 osc_update_next_shrink(client);
871 #define GRANT_SHRINK_RPC_BATCH 100
873 static struct delayed_work work;
875 static void osc_grant_work_handler(struct work_struct *data)
877 struct client_obd *cli;
879 bool init_next_shrink = true;
880 time64_t next_shrink = ktime_get_seconds() + GRANT_SHRINK_INTERVAL;
883 mutex_lock(&client_gtd.gtd_mutex);
884 list_for_each_entry(cli, &client_gtd.gtd_clients,
886 if (++rpc_sent < GRANT_SHRINK_RPC_BATCH &&
887 osc_should_shrink_grant(cli))
888 osc_shrink_grant(cli);
890 if (!init_next_shrink) {
891 if (cli->cl_next_shrink_grant < next_shrink &&
892 cli->cl_next_shrink_grant > ktime_get_seconds())
893 next_shrink = cli->cl_next_shrink_grant;
895 init_next_shrink = false;
896 next_shrink = cli->cl_next_shrink_grant;
899 mutex_unlock(&client_gtd.gtd_mutex);
901 if (client_gtd.gtd_stopped == 1)
904 if (next_shrink > ktime_get_seconds())
905 schedule_delayed_work(&work, msecs_to_jiffies(
906 (next_shrink - ktime_get_seconds()) *
909 schedule_work(&work.work);
913 * Start grant thread for returing grant to server for idle clients.
915 static int osc_start_grant_work(void)
917 client_gtd.gtd_stopped = 0;
918 mutex_init(&client_gtd.gtd_mutex);
919 INIT_LIST_HEAD(&client_gtd.gtd_clients);
921 INIT_DELAYED_WORK(&work, osc_grant_work_handler);
922 schedule_work(&work.work);
927 static void osc_stop_grant_work(void)
929 client_gtd.gtd_stopped = 1;
930 cancel_delayed_work_sync(&work);
933 static void osc_add_grant_list(struct client_obd *client)
935 mutex_lock(&client_gtd.gtd_mutex);
936 list_add(&client->cl_grant_chain, &client_gtd.gtd_clients);
937 mutex_unlock(&client_gtd.gtd_mutex);
940 static void osc_del_grant_list(struct client_obd *client)
942 if (list_empty(&client->cl_grant_chain))
945 mutex_lock(&client_gtd.gtd_mutex);
946 list_del_init(&client->cl_grant_chain);
947 mutex_unlock(&client_gtd.gtd_mutex);
950 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
953 * ocd_grant is the total grant amount we're expect to hold: if we've
954 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
955 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
958 * race is tolerable here: if we're evicted, but imp_state already
959 * left EVICTED state, then cl_dirty_pages must be 0 already.
961 spin_lock(&cli->cl_loi_list_lock);
962 cli->cl_avail_grant = ocd->ocd_grant;
963 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
964 cli->cl_avail_grant -= cli->cl_reserved_grant;
965 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
966 cli->cl_avail_grant -= cli->cl_dirty_grant;
968 cli->cl_avail_grant -=
969 cli->cl_dirty_pages << PAGE_SHIFT;
972 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
976 /* overhead for each extent insertion */
977 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
978 /* determine the appropriate chunk size used by osc_extent. */
979 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
980 ocd->ocd_grant_blkbits);
981 /* max_pages_per_rpc must be chunk aligned */
982 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
983 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
984 ~chunk_mask) & chunk_mask;
985 /* determine maximum extent size, in #pages */
986 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
987 cli->cl_max_extent_pages = size >> PAGE_SHIFT;
988 if (cli->cl_max_extent_pages == 0)
989 cli->cl_max_extent_pages = 1;
991 cli->cl_grant_extent_tax = 0;
992 cli->cl_chunkbits = PAGE_SHIFT;
993 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
995 spin_unlock(&cli->cl_loi_list_lock);
997 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
998 "chunk bits: %d cl_max_extent_pages: %d\n",
1000 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
1001 cli->cl_max_extent_pages);
1003 if (OCD_HAS_FLAG(ocd, GRANT_SHRINK) && list_empty(&cli->cl_grant_chain))
1004 osc_add_grant_list(cli);
1006 EXPORT_SYMBOL(osc_init_grant);
1008 /* We assume that the reason this OSC got a short read is because it read
1009 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1010 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1011 * this stripe never got written at or beyond this stripe offset yet. */
1012 static void handle_short_read(int nob_read, size_t page_count,
1013 struct brw_page **pga)
1018 /* skip bytes read OK */
1019 while (nob_read > 0) {
1020 LASSERT (page_count > 0);
1022 if (pga[i]->count > nob_read) {
1023 /* EOF inside this page */
1024 ptr = kmap(pga[i]->pg) +
1025 (pga[i]->off & ~PAGE_MASK);
1026 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1033 nob_read -= pga[i]->count;
1038 /* zero remaining pages */
1039 while (page_count-- > 0) {
1040 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
1041 memset(ptr, 0, pga[i]->count);
1047 static int check_write_rcs(struct ptlrpc_request *req,
1048 int requested_nob, int niocount,
1049 size_t page_count, struct brw_page **pga)
1054 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1055 sizeof(*remote_rcs) *
1057 if (remote_rcs == NULL) {
1058 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1062 /* return error if any niobuf was in error */
1063 for (i = 0; i < niocount; i++) {
1064 if ((int)remote_rcs[i] < 0)
1065 return(remote_rcs[i]);
1067 if (remote_rcs[i] != 0) {
1068 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1069 i, remote_rcs[i], req);
1073 if (req->rq_bulk != NULL &&
1074 req->rq_bulk->bd_nob_transferred != requested_nob) {
1075 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1076 req->rq_bulk->bd_nob_transferred, requested_nob);
1083 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1085 if (p1->flag != p2->flag) {
1086 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1087 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1088 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1090 /* warn if we try to combine flags that we don't know to be
1091 * safe to combine */
1092 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1093 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1094 "report this at https://jira.whamcloud.com/\n",
1095 p1->flag, p2->flag);
1100 return (p1->off + p1->count == p2->off);
1103 static int osc_checksum_bulk_t10pi(const char *obd_name, int nob,
1104 size_t pg_count, struct brw_page **pga,
1105 int opc, obd_dif_csum_fn *fn,
1109 struct ahash_request *req;
1110 /* Used Adler as the default checksum type on top of DIF tags */
1111 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1112 struct page *__page;
1113 unsigned char *buffer;
1115 unsigned int bufsize;
1117 int used_number = 0;
1123 LASSERT(pg_count > 0);
1125 __page = alloc_page(GFP_KERNEL);
1129 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1132 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
1133 obd_name, cfs_crypto_hash_name(cfs_alg), rc);
1137 buffer = kmap(__page);
1138 guard_start = (__u16 *)buffer;
1139 guard_number = PAGE_SIZE / sizeof(*guard_start);
1140 while (nob > 0 && pg_count > 0) {
1141 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1143 /* corrupt the data before we compute the checksum, to
1144 * simulate an OST->client data error */
1145 if (unlikely(i == 0 && opc == OST_READ &&
1146 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))) {
1147 unsigned char *ptr = kmap(pga[i]->pg);
1148 int off = pga[i]->off & ~PAGE_MASK;
1150 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1155 * The left guard number should be able to hold checksums of a
1158 rc = obd_page_dif_generate_buffer(obd_name, pga[i]->pg,
1159 pga[i]->off & ~PAGE_MASK,
1161 guard_start + used_number,
1162 guard_number - used_number,
1168 used_number += used;
1169 if (used_number == guard_number) {
1170 cfs_crypto_hash_update_page(req, __page, 0,
1171 used_number * sizeof(*guard_start));
1175 nob -= pga[i]->count;
1183 if (used_number != 0)
1184 cfs_crypto_hash_update_page(req, __page, 0,
1185 used_number * sizeof(*guard_start));
1187 bufsize = sizeof(cksum);
1188 cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
1190 /* For sending we only compute the wrong checksum instead
1191 * of corrupting the data so it is still correct on a redo */
1192 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1197 __free_page(__page);
1201 static int osc_checksum_bulk(int nob, size_t pg_count,
1202 struct brw_page **pga, int opc,
1203 enum cksum_types cksum_type,
1207 struct ahash_request *req;
1208 unsigned int bufsize;
1209 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1211 LASSERT(pg_count > 0);
1213 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1215 CERROR("Unable to initialize checksum hash %s\n",
1216 cfs_crypto_hash_name(cfs_alg));
1217 return PTR_ERR(req);
1220 while (nob > 0 && pg_count > 0) {
1221 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1223 /* corrupt the data before we compute the checksum, to
1224 * simulate an OST->client data error */
1225 if (i == 0 && opc == OST_READ &&
1226 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1227 unsigned char *ptr = kmap(pga[i]->pg);
1228 int off = pga[i]->off & ~PAGE_MASK;
1230 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1233 cfs_crypto_hash_update_page(req, pga[i]->pg,
1234 pga[i]->off & ~PAGE_MASK,
1236 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1237 (int)(pga[i]->off & ~PAGE_MASK));
1239 nob -= pga[i]->count;
1244 bufsize = sizeof(*cksum);
1245 cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1247 /* For sending we only compute the wrong checksum instead
1248 * of corrupting the data so it is still correct on a redo */
1249 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1255 static int osc_checksum_bulk_rw(const char *obd_name,
1256 enum cksum_types cksum_type,
1257 int nob, size_t pg_count,
1258 struct brw_page **pga, int opc,
1261 obd_dif_csum_fn *fn = NULL;
1262 int sector_size = 0;
1266 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
1269 rc = osc_checksum_bulk_t10pi(obd_name, nob, pg_count, pga,
1270 opc, fn, sector_size, check_sum);
1272 rc = osc_checksum_bulk(nob, pg_count, pga, opc, cksum_type,
1279 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1280 u32 page_count, struct brw_page **pga,
1281 struct ptlrpc_request **reqp, int resend)
1283 struct ptlrpc_request *req;
1284 struct ptlrpc_bulk_desc *desc;
1285 struct ost_body *body;
1286 struct obd_ioobj *ioobj;
1287 struct niobuf_remote *niobuf;
1288 int niocount, i, requested_nob, opc, rc, short_io_size = 0;
1289 struct osc_brw_async_args *aa;
1290 struct req_capsule *pill;
1291 struct brw_page *pg_prev;
1293 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1296 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1297 RETURN(-ENOMEM); /* Recoverable */
1298 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1299 RETURN(-EINVAL); /* Fatal */
1301 if ((cmd & OBD_BRW_WRITE) != 0) {
1303 req = ptlrpc_request_alloc_pool(cli->cl_import,
1305 &RQF_OST_BRW_WRITE);
1308 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1313 for (niocount = i = 1; i < page_count; i++) {
1314 if (!can_merge_pages(pga[i - 1], pga[i]))
1318 pill = &req->rq_pill;
1319 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1321 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1322 niocount * sizeof(*niobuf));
1324 for (i = 0; i < page_count; i++)
1325 short_io_size += pga[i]->count;
1327 /* Check if read/write is small enough to be a short io. */
1328 if (short_io_size > cli->cl_max_short_io_bytes || niocount > 1 ||
1329 !imp_connect_shortio(cli->cl_import))
1332 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1333 opc == OST_READ ? 0 : short_io_size);
1334 if (opc == OST_READ)
1335 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1338 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1340 ptlrpc_request_free(req);
1343 osc_set_io_portal(req);
1345 ptlrpc_at_set_req_timeout(req);
1346 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1348 req->rq_no_retry_einprogress = 1;
1350 if (short_io_size != 0) {
1352 short_io_buf = NULL;
1356 desc = ptlrpc_prep_bulk_imp(req, page_count,
1357 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1358 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1359 PTLRPC_BULK_PUT_SINK) |
1360 PTLRPC_BULK_BUF_KIOV,
1362 &ptlrpc_bulk_kiov_pin_ops);
1365 GOTO(out, rc = -ENOMEM);
1366 /* NB request now owns desc and will free it when it gets freed */
1368 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1369 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1370 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1371 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1373 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1375 /* For READ and WRITE, we can't fill o_uid and o_gid using from_kuid()
1376 * and from_kgid(), because they are asynchronous. Fortunately, variable
1377 * oa contains valid o_uid and o_gid in these two operations.
1378 * Besides, filling o_uid and o_gid is enough for nrs-tbf, see LU-9658.
1379 * OBD_MD_FLUID and OBD_MD_FLUID is not set in order to avoid breaking
1380 * other process logic */
1381 body->oa.o_uid = oa->o_uid;
1382 body->oa.o_gid = oa->o_gid;
1384 obdo_to_ioobj(oa, ioobj);
1385 ioobj->ioo_bufcnt = niocount;
1386 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1387 * that might be send for this request. The actual number is decided
1388 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1389 * "max - 1" for old client compatibility sending "0", and also so the
1390 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1392 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1394 ioobj_max_brw_set(ioobj, 0);
1396 if (short_io_size != 0) {
1397 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1398 body->oa.o_valid |= OBD_MD_FLFLAGS;
1399 body->oa.o_flags = 0;
1401 body->oa.o_flags |= OBD_FL_SHORT_IO;
1402 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1404 if (opc == OST_WRITE) {
1405 short_io_buf = req_capsule_client_get(pill,
1407 LASSERT(short_io_buf != NULL);
1411 LASSERT(page_count > 0);
1413 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1414 struct brw_page *pg = pga[i];
1415 int poff = pg->off & ~PAGE_MASK;
1417 LASSERT(pg->count > 0);
1418 /* make sure there is no gap in the middle of page array */
1419 LASSERTF(page_count == 1 ||
1420 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1421 ergo(i > 0 && i < page_count - 1,
1422 poff == 0 && pg->count == PAGE_SIZE) &&
1423 ergo(i == page_count - 1, poff == 0)),
1424 "i: %d/%d pg: %p off: %llu, count: %u\n",
1425 i, page_count, pg, pg->off, pg->count);
1426 LASSERTF(i == 0 || pg->off > pg_prev->off,
1427 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1428 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1430 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1431 pg_prev->pg, page_private(pg_prev->pg),
1432 pg_prev->pg->index, pg_prev->off);
1433 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1434 (pg->flag & OBD_BRW_SRVLOCK));
1435 if (short_io_size != 0 && opc == OST_WRITE) {
1436 unsigned char *ptr = ll_kmap_atomic(pg->pg, KM_USER0);
1438 LASSERT(short_io_size >= requested_nob + pg->count);
1439 memcpy(short_io_buf + requested_nob,
1442 ll_kunmap_atomic(ptr, KM_USER0);
1443 } else if (short_io_size == 0) {
1444 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1447 requested_nob += pg->count;
1449 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1451 niobuf->rnb_len += pg->count;
1453 niobuf->rnb_offset = pg->off;
1454 niobuf->rnb_len = pg->count;
1455 niobuf->rnb_flags = pg->flag;
1460 LASSERTF((void *)(niobuf - niocount) ==
1461 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1462 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1463 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1465 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1467 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1468 body->oa.o_valid |= OBD_MD_FLFLAGS;
1469 body->oa.o_flags = 0;
1471 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1474 if (osc_should_shrink_grant(cli))
1475 osc_shrink_grant_local(cli, &body->oa);
1477 /* size[REQ_REC_OFF] still sizeof (*body) */
1478 if (opc == OST_WRITE) {
1479 if (cli->cl_checksum &&
1480 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1481 /* store cl_cksum_type in a local variable since
1482 * it can be changed via lprocfs */
1483 enum cksum_types cksum_type = cli->cl_cksum_type;
1485 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1486 body->oa.o_flags = 0;
1488 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1490 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1492 rc = osc_checksum_bulk_rw(obd_name, cksum_type,
1493 requested_nob, page_count,
1497 CDEBUG(D_PAGE, "failed to checksum, rc = %d\n",
1501 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1504 /* save this in 'oa', too, for later checking */
1505 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1506 oa->o_flags |= obd_cksum_type_pack(obd_name,
1509 /* clear out the checksum flag, in case this is a
1510 * resend but cl_checksum is no longer set. b=11238 */
1511 oa->o_valid &= ~OBD_MD_FLCKSUM;
1513 oa->o_cksum = body->oa.o_cksum;
1514 /* 1 RC per niobuf */
1515 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1516 sizeof(__u32) * niocount);
1518 if (cli->cl_checksum &&
1519 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1520 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1521 body->oa.o_flags = 0;
1522 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1523 cli->cl_cksum_type);
1524 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1527 /* Client cksum has been already copied to wire obdo in previous
1528 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1529 * resent due to cksum error, this will allow Server to
1530 * check+dump pages on its side */
1532 ptlrpc_request_set_replen(req);
1534 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1535 aa = ptlrpc_req_async_args(req);
1537 aa->aa_requested_nob = requested_nob;
1538 aa->aa_nio_count = niocount;
1539 aa->aa_page_count = page_count;
1543 INIT_LIST_HEAD(&aa->aa_oaps);
1546 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1547 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1548 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1549 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1553 ptlrpc_req_finished(req);
1557 char dbgcksum_file_name[PATH_MAX];
1559 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1560 struct brw_page **pga, __u32 server_cksum,
1568 /* will only keep dump of pages on first error for the same range in
1569 * file/fid, not during the resends/retries. */
1570 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1571 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1572 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1573 libcfs_debug_file_path_arr :
1574 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1575 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1576 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1577 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1579 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1580 client_cksum, server_cksum);
1581 filp = filp_open(dbgcksum_file_name,
1582 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1586 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1587 "checksum error: rc = %d\n", dbgcksum_file_name,
1590 CERROR("%s: can't open to dump pages with checksum "
1591 "error: rc = %d\n", dbgcksum_file_name, rc);
1595 for (i = 0; i < page_count; i++) {
1596 len = pga[i]->count;
1597 buf = kmap(pga[i]->pg);
1599 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1601 CERROR("%s: wanted to write %u but got %d "
1602 "error\n", dbgcksum_file_name, len, rc);
1607 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1608 dbgcksum_file_name, rc);
1613 rc = ll_vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1615 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1616 filp_close(filp, NULL);
1621 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1622 __u32 client_cksum, __u32 server_cksum,
1623 struct osc_brw_async_args *aa)
1625 const char *obd_name = aa->aa_cli->cl_import->imp_obd->obd_name;
1626 enum cksum_types cksum_type;
1627 obd_dif_csum_fn *fn = NULL;
1628 int sector_size = 0;
1634 if (server_cksum == client_cksum) {
1635 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1639 if (aa->aa_cli->cl_checksum_dump)
1640 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1641 server_cksum, client_cksum);
1643 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1646 switch (cksum_type) {
1647 case OBD_CKSUM_T10IP512:
1652 case OBD_CKSUM_T10IP4K:
1657 case OBD_CKSUM_T10CRC512:
1659 fn = obd_dif_crc_fn;
1662 case OBD_CKSUM_T10CRC4K:
1664 fn = obd_dif_crc_fn;
1672 rc = osc_checksum_bulk_t10pi(obd_name, aa->aa_requested_nob,
1680 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1681 aa->aa_ppga, OST_WRITE, cksum_type,
1685 msg = "failed to calculate the client write checksum";
1686 else if (cksum_type != obd_cksum_type_unpack(aa->aa_oa->o_flags))
1687 msg = "the server did not use the checksum type specified in "
1688 "the original request - likely a protocol problem";
1689 else if (new_cksum == server_cksum)
1690 msg = "changed on the client after we checksummed it - "
1691 "likely false positive due to mmap IO (bug 11742)";
1692 else if (new_cksum == client_cksum)
1693 msg = "changed in transit before arrival at OST";
1695 msg = "changed in transit AND doesn't match the original - "
1696 "likely false positive due to mmap IO (bug 11742)";
1698 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1699 DFID " object "DOSTID" extent [%llu-%llu], original "
1700 "client csum %x (type %x), server csum %x (type %x),"
1701 " client csum now %x\n",
1702 obd_name, msg, libcfs_nid2str(peer->nid),
1703 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1704 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1705 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1706 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1707 aa->aa_ppga[aa->aa_page_count - 1]->off +
1708 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1710 obd_cksum_type_unpack(aa->aa_oa->o_flags),
1711 server_cksum, cksum_type, new_cksum);
1715 /* Note rc enters this function as number of bytes transferred */
1716 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1718 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1719 struct client_obd *cli = aa->aa_cli;
1720 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1721 const struct lnet_process_id *peer =
1722 &req->rq_import->imp_connection->c_peer;
1723 struct ost_body *body;
1724 u32 client_cksum = 0;
1727 if (rc < 0 && rc != -EDQUOT) {
1728 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1732 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1733 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1735 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1739 /* set/clear over quota flag for a uid/gid/projid */
1740 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1741 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1742 unsigned qid[LL_MAXQUOTAS] = {
1743 body->oa.o_uid, body->oa.o_gid,
1744 body->oa.o_projid };
1745 CDEBUG(D_QUOTA, "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1746 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1747 body->oa.o_valid, body->oa.o_flags);
1748 osc_quota_setdq(cli, qid, body->oa.o_valid,
1752 osc_update_grant(cli, body);
1757 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1758 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1760 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1762 CERROR("Unexpected +ve rc %d\n", rc);
1766 if (req->rq_bulk != NULL &&
1767 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1770 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1771 check_write_checksum(&body->oa, peer, client_cksum,
1772 body->oa.o_cksum, aa))
1775 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1776 aa->aa_page_count, aa->aa_ppga);
1780 /* The rest of this function executes only for OST_READs */
1782 if (req->rq_bulk == NULL) {
1783 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1785 LASSERT(rc == req->rq_status);
1787 /* if unwrap_bulk failed, return -EAGAIN to retry */
1788 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1791 GOTO(out, rc = -EAGAIN);
1793 if (rc > aa->aa_requested_nob) {
1794 CERROR("Unexpected rc %d (%d requested)\n", rc,
1795 aa->aa_requested_nob);
1799 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
1800 CERROR ("Unexpected rc %d (%d transferred)\n",
1801 rc, req->rq_bulk->bd_nob_transferred);
1805 if (req->rq_bulk == NULL) {
1807 int nob, pg_count, i = 0;
1810 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
1811 pg_count = aa->aa_page_count;
1812 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
1815 while (nob > 0 && pg_count > 0) {
1817 int count = aa->aa_ppga[i]->count > nob ?
1818 nob : aa->aa_ppga[i]->count;
1820 CDEBUG(D_CACHE, "page %p count %d\n",
1821 aa->aa_ppga[i]->pg, count);
1822 ptr = ll_kmap_atomic(aa->aa_ppga[i]->pg, KM_USER0);
1823 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
1825 ll_kunmap_atomic((void *) ptr, KM_USER0);
1834 if (rc < aa->aa_requested_nob)
1835 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1837 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1838 static int cksum_counter;
1839 u32 server_cksum = body->oa.o_cksum;
1842 enum cksum_types cksum_type;
1843 u32 o_flags = body->oa.o_valid & OBD_MD_FLFLAGS ?
1844 body->oa.o_flags : 0;
1846 cksum_type = obd_cksum_type_unpack(o_flags);
1847 rc = osc_checksum_bulk_rw(obd_name, cksum_type, rc,
1848 aa->aa_page_count, aa->aa_ppga,
1849 OST_READ, &client_cksum);
1853 if (req->rq_bulk != NULL &&
1854 peer->nid != req->rq_bulk->bd_sender) {
1856 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1859 if (server_cksum != client_cksum) {
1860 struct ost_body *clbody;
1861 u32 page_count = aa->aa_page_count;
1863 clbody = req_capsule_client_get(&req->rq_pill,
1865 if (cli->cl_checksum_dump)
1866 dump_all_bulk_pages(&clbody->oa, page_count,
1867 aa->aa_ppga, server_cksum,
1870 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1871 "%s%s%s inode "DFID" object "DOSTID
1872 " extent [%llu-%llu], client %x, "
1873 "server %x, cksum_type %x\n",
1875 libcfs_nid2str(peer->nid),
1877 clbody->oa.o_valid & OBD_MD_FLFID ?
1878 clbody->oa.o_parent_seq : 0ULL,
1879 clbody->oa.o_valid & OBD_MD_FLFID ?
1880 clbody->oa.o_parent_oid : 0,
1881 clbody->oa.o_valid & OBD_MD_FLFID ?
1882 clbody->oa.o_parent_ver : 0,
1883 POSTID(&body->oa.o_oi),
1884 aa->aa_ppga[0]->off,
1885 aa->aa_ppga[page_count-1]->off +
1886 aa->aa_ppga[page_count-1]->count - 1,
1887 client_cksum, server_cksum,
1890 aa->aa_oa->o_cksum = client_cksum;
1894 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1897 } else if (unlikely(client_cksum)) {
1898 static int cksum_missed;
1901 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1902 CERROR("Checksum %u requested from %s but not sent\n",
1903 cksum_missed, libcfs_nid2str(peer->nid));
1909 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1910 aa->aa_oa, &body->oa);
1915 static int osc_brw_redo_request(struct ptlrpc_request *request,
1916 struct osc_brw_async_args *aa, int rc)
1918 struct ptlrpc_request *new_req;
1919 struct osc_brw_async_args *new_aa;
1920 struct osc_async_page *oap;
1923 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1924 "redo for recoverable error %d", rc);
1926 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1927 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
1928 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
1929 aa->aa_ppga, &new_req, 1);
1933 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1934 if (oap->oap_request != NULL) {
1935 LASSERTF(request == oap->oap_request,
1936 "request %p != oap_request %p\n",
1937 request, oap->oap_request);
1938 if (oap->oap_interrupted) {
1939 ptlrpc_req_finished(new_req);
1945 * New request takes over pga and oaps from old request.
1946 * Note that copying a list_head doesn't work, need to move it...
1949 new_req->rq_interpret_reply = request->rq_interpret_reply;
1950 new_req->rq_async_args = request->rq_async_args;
1951 new_req->rq_commit_cb = request->rq_commit_cb;
1952 /* cap resend delay to the current request timeout, this is similar to
1953 * what ptlrpc does (see after_reply()) */
1954 if (aa->aa_resends > new_req->rq_timeout)
1955 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
1957 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
1958 new_req->rq_generation_set = 1;
1959 new_req->rq_import_generation = request->rq_import_generation;
1961 new_aa = ptlrpc_req_async_args(new_req);
1963 INIT_LIST_HEAD(&new_aa->aa_oaps);
1964 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1965 INIT_LIST_HEAD(&new_aa->aa_exts);
1966 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1967 new_aa->aa_resends = aa->aa_resends;
1969 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1970 if (oap->oap_request) {
1971 ptlrpc_req_finished(oap->oap_request);
1972 oap->oap_request = ptlrpc_request_addref(new_req);
1976 /* XXX: This code will run into problem if we're going to support
1977 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1978 * and wait for all of them to be finished. We should inherit request
1979 * set from old request. */
1980 ptlrpcd_add_req(new_req);
1982 DEBUG_REQ(D_INFO, new_req, "new request");
1987 * ugh, we want disk allocation on the target to happen in offset order. we'll
1988 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1989 * fine for our small page arrays and doesn't require allocation. its an
1990 * insertion sort that swaps elements that are strides apart, shrinking the
1991 * stride down until its '1' and the array is sorted.
1993 static void sort_brw_pages(struct brw_page **array, int num)
1996 struct brw_page *tmp;
2000 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
2005 for (i = stride ; i < num ; i++) {
2008 while (j >= stride && array[j - stride]->off > tmp->off) {
2009 array[j] = array[j - stride];
2014 } while (stride > 1);
2017 static void osc_release_ppga(struct brw_page **ppga, size_t count)
2019 LASSERT(ppga != NULL);
2020 OBD_FREE(ppga, sizeof(*ppga) * count);
2023 static int brw_interpret(const struct lu_env *env,
2024 struct ptlrpc_request *req, void *args, int rc)
2026 struct osc_brw_async_args *aa = args;
2027 struct osc_extent *ext;
2028 struct osc_extent *tmp;
2029 struct client_obd *cli = aa->aa_cli;
2030 unsigned long transferred = 0;
2034 rc = osc_brw_fini_request(req, rc);
2035 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2037 * When server returns -EINPROGRESS, client should always retry
2038 * regardless of the number of times the bulk was resent already.
2040 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
2041 if (req->rq_import_generation !=
2042 req->rq_import->imp_generation) {
2043 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2044 ""DOSTID", rc = %d.\n",
2045 req->rq_import->imp_obd->obd_name,
2046 POSTID(&aa->aa_oa->o_oi), rc);
2047 } else if (rc == -EINPROGRESS ||
2048 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2049 rc = osc_brw_redo_request(req, aa, rc);
2051 CERROR("%s: too many resent retries for object: "
2052 "%llu:%llu, rc = %d.\n",
2053 req->rq_import->imp_obd->obd_name,
2054 POSTID(&aa->aa_oa->o_oi), rc);
2059 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2064 struct obdo *oa = aa->aa_oa;
2065 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
2066 unsigned long valid = 0;
2067 struct cl_object *obj;
2068 struct osc_async_page *last;
2070 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
2071 obj = osc2cl(last->oap_obj);
2073 cl_object_attr_lock(obj);
2074 if (oa->o_valid & OBD_MD_FLBLOCKS) {
2075 attr->cat_blocks = oa->o_blocks;
2076 valid |= CAT_BLOCKS;
2078 if (oa->o_valid & OBD_MD_FLMTIME) {
2079 attr->cat_mtime = oa->o_mtime;
2082 if (oa->o_valid & OBD_MD_FLATIME) {
2083 attr->cat_atime = oa->o_atime;
2086 if (oa->o_valid & OBD_MD_FLCTIME) {
2087 attr->cat_ctime = oa->o_ctime;
2091 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2092 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
2093 loff_t last_off = last->oap_count + last->oap_obj_off +
2096 /* Change file size if this is an out of quota or
2097 * direct IO write and it extends the file size */
2098 if (loi->loi_lvb.lvb_size < last_off) {
2099 attr->cat_size = last_off;
2102 /* Extend KMS if it's not a lockless write */
2103 if (loi->loi_kms < last_off &&
2104 oap2osc_page(last)->ops_srvlock == 0) {
2105 attr->cat_kms = last_off;
2111 cl_object_attr_update(env, obj, attr, valid);
2112 cl_object_attr_unlock(obj);
2114 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
2116 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
2117 osc_inc_unstable_pages(req);
2119 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
2120 list_del_init(&ext->oe_link);
2121 osc_extent_finish(env, ext, 1,
2122 rc && req->rq_no_delay ? -EWOULDBLOCK : rc);
2124 LASSERT(list_empty(&aa->aa_exts));
2125 LASSERT(list_empty(&aa->aa_oaps));
2127 transferred = (req->rq_bulk == NULL ? /* short io */
2128 aa->aa_requested_nob :
2129 req->rq_bulk->bd_nob_transferred);
2131 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2132 ptlrpc_lprocfs_brw(req, transferred);
2134 spin_lock(&cli->cl_loi_list_lock);
2135 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2136 * is called so we know whether to go to sync BRWs or wait for more
2137 * RPCs to complete */
2138 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2139 cli->cl_w_in_flight--;
2141 cli->cl_r_in_flight--;
2142 osc_wake_cache_waiters(cli);
2143 spin_unlock(&cli->cl_loi_list_lock);
2145 osc_io_unplug(env, cli, NULL);
2149 static void brw_commit(struct ptlrpc_request *req)
2151 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
2152 * this called via the rq_commit_cb, I need to ensure
2153 * osc_dec_unstable_pages is still called. Otherwise unstable
2154 * pages may be leaked. */
2155 spin_lock(&req->rq_lock);
2156 if (likely(req->rq_unstable)) {
2157 req->rq_unstable = 0;
2158 spin_unlock(&req->rq_lock);
2160 osc_dec_unstable_pages(req);
2162 req->rq_committed = 1;
2163 spin_unlock(&req->rq_lock);
2168 * Build an RPC by the list of extent @ext_list. The caller must ensure
2169 * that the total pages in this list are NOT over max pages per RPC.
2170 * Extents in the list must be in OES_RPC state.
2172 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
2173 struct list_head *ext_list, int cmd)
2175 struct ptlrpc_request *req = NULL;
2176 struct osc_extent *ext;
2177 struct brw_page **pga = NULL;
2178 struct osc_brw_async_args *aa = NULL;
2179 struct obdo *oa = NULL;
2180 struct osc_async_page *oap;
2181 struct osc_object *obj = NULL;
2182 struct cl_req_attr *crattr = NULL;
2183 loff_t starting_offset = OBD_OBJECT_EOF;
2184 loff_t ending_offset = 0;
2188 bool soft_sync = false;
2189 bool interrupted = false;
2190 bool ndelay = false;
2194 __u32 layout_version = 0;
2195 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
2196 struct ost_body *body;
2198 LASSERT(!list_empty(ext_list));
2200 /* add pages into rpc_list to build BRW rpc */
2201 list_for_each_entry(ext, ext_list, oe_link) {
2202 LASSERT(ext->oe_state == OES_RPC);
2203 mem_tight |= ext->oe_memalloc;
2204 grant += ext->oe_grants;
2205 page_count += ext->oe_nr_pages;
2206 layout_version = MAX(layout_version, ext->oe_layout_version);
2211 soft_sync = osc_over_unstable_soft_limit(cli);
2213 mpflag = cfs_memory_pressure_get_and_set();
2215 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2217 GOTO(out, rc = -ENOMEM);
2219 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2221 GOTO(out, rc = -ENOMEM);
2224 list_for_each_entry(ext, ext_list, oe_link) {
2225 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
2227 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2229 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
2230 pga[i] = &oap->oap_brw_page;
2231 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2234 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2235 if (starting_offset == OBD_OBJECT_EOF ||
2236 starting_offset > oap->oap_obj_off)
2237 starting_offset = oap->oap_obj_off;
2239 LASSERT(oap->oap_page_off == 0);
2240 if (ending_offset < oap->oap_obj_off + oap->oap_count)
2241 ending_offset = oap->oap_obj_off +
2244 LASSERT(oap->oap_page_off + oap->oap_count ==
2246 if (oap->oap_interrupted)
2253 /* first page in the list */
2254 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
2256 crattr = &osc_env_info(env)->oti_req_attr;
2257 memset(crattr, 0, sizeof(*crattr));
2258 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2259 crattr->cra_flags = ~0ULL;
2260 crattr->cra_page = oap2cl_page(oap);
2261 crattr->cra_oa = oa;
2262 cl_req_attr_set(env, osc2cl(obj), crattr);
2264 if (cmd == OBD_BRW_WRITE) {
2265 oa->o_grant_used = grant;
2266 if (layout_version > 0) {
2267 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2268 PFID(&oa->o_oi.oi_fid), layout_version);
2270 oa->o_layout_version = layout_version;
2271 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2275 sort_brw_pages(pga, page_count);
2276 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2278 CERROR("prep_req failed: %d\n", rc);
2282 req->rq_commit_cb = brw_commit;
2283 req->rq_interpret_reply = brw_interpret;
2284 req->rq_memalloc = mem_tight != 0;
2285 oap->oap_request = ptlrpc_request_addref(req);
2286 if (interrupted && !req->rq_intr)
2287 ptlrpc_mark_interrupted(req);
2289 req->rq_no_resend = req->rq_no_delay = 1;
2290 /* probably set a shorter timeout value.
2291 * to handle ETIMEDOUT in brw_interpret() correctly. */
2292 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2295 /* Need to update the timestamps after the request is built in case
2296 * we race with setattr (locally or in queue at OST). If OST gets
2297 * later setattr before earlier BRW (as determined by the request xid),
2298 * the OST will not use BRW timestamps. Sadly, there is no obvious
2299 * way to do this in a single call. bug 10150 */
2300 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2301 crattr->cra_oa = &body->oa;
2302 crattr->cra_flags = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2303 cl_req_attr_set(env, osc2cl(obj), crattr);
2304 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2306 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2307 aa = ptlrpc_req_async_args(req);
2308 INIT_LIST_HEAD(&aa->aa_oaps);
2309 list_splice_init(&rpc_list, &aa->aa_oaps);
2310 INIT_LIST_HEAD(&aa->aa_exts);
2311 list_splice_init(ext_list, &aa->aa_exts);
2313 spin_lock(&cli->cl_loi_list_lock);
2314 starting_offset >>= PAGE_SHIFT;
2315 if (cmd == OBD_BRW_READ) {
2316 cli->cl_r_in_flight++;
2317 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2318 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2319 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2320 starting_offset + 1);
2322 cli->cl_w_in_flight++;
2323 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2324 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2325 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2326 starting_offset + 1);
2328 spin_unlock(&cli->cl_loi_list_lock);
2330 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
2331 page_count, aa, cli->cl_r_in_flight,
2332 cli->cl_w_in_flight);
2333 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2335 ptlrpcd_add_req(req);
2341 cfs_memory_pressure_restore(mpflag);
2344 LASSERT(req == NULL);
2347 OBD_SLAB_FREE_PTR(oa, osc_obdo_kmem);
2349 OBD_FREE(pga, sizeof(*pga) * page_count);
2350 /* this should happen rarely and is pretty bad, it makes the
2351 * pending list not follow the dirty order */
2352 while (!list_empty(ext_list)) {
2353 ext = list_entry(ext_list->next, struct osc_extent,
2355 list_del_init(&ext->oe_link);
2356 osc_extent_finish(env, ext, 0, rc);
2362 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2366 LASSERT(lock != NULL);
2368 lock_res_and_lock(lock);
2370 if (lock->l_ast_data == NULL)
2371 lock->l_ast_data = data;
2372 if (lock->l_ast_data == data)
2375 unlock_res_and_lock(lock);
2380 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2381 void *cookie, struct lustre_handle *lockh,
2382 enum ldlm_mode mode, __u64 *flags, bool speculative,
2385 bool intent = *flags & LDLM_FL_HAS_INTENT;
2389 /* The request was created before ldlm_cli_enqueue call. */
2390 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2391 struct ldlm_reply *rep;
2393 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2394 LASSERT(rep != NULL);
2396 rep->lock_policy_res1 =
2397 ptlrpc_status_ntoh(rep->lock_policy_res1);
2398 if (rep->lock_policy_res1)
2399 errcode = rep->lock_policy_res1;
2401 *flags |= LDLM_FL_LVB_READY;
2402 } else if (errcode == ELDLM_OK) {
2403 *flags |= LDLM_FL_LVB_READY;
2406 /* Call the update callback. */
2407 rc = (*upcall)(cookie, lockh, errcode);
2409 /* release the reference taken in ldlm_cli_enqueue() */
2410 if (errcode == ELDLM_LOCK_MATCHED)
2412 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2413 ldlm_lock_decref(lockh, mode);
2418 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2421 struct osc_enqueue_args *aa = args;
2422 struct ldlm_lock *lock;
2423 struct lustre_handle *lockh = &aa->oa_lockh;
2424 enum ldlm_mode mode = aa->oa_mode;
2425 struct ost_lvb *lvb = aa->oa_lvb;
2426 __u32 lvb_len = sizeof(*lvb);
2431 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2433 lock = ldlm_handle2lock(lockh);
2434 LASSERTF(lock != NULL,
2435 "lockh %#llx, req %p, aa %p - client evicted?\n",
2436 lockh->cookie, req, aa);
2438 /* Take an additional reference so that a blocking AST that
2439 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2440 * to arrive after an upcall has been executed by
2441 * osc_enqueue_fini(). */
2442 ldlm_lock_addref(lockh, mode);
2444 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2445 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2447 /* Let CP AST to grant the lock first. */
2448 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2450 if (aa->oa_speculative) {
2451 LASSERT(aa->oa_lvb == NULL);
2452 LASSERT(aa->oa_flags == NULL);
2453 aa->oa_flags = &flags;
2456 /* Complete obtaining the lock procedure. */
2457 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2458 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2460 /* Complete osc stuff. */
2461 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2462 aa->oa_flags, aa->oa_speculative, rc);
2464 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2466 ldlm_lock_decref(lockh, mode);
2467 LDLM_LOCK_PUT(lock);
2471 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2473 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2474 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2475 * other synchronous requests, however keeping some locks and trying to obtain
2476 * others may take a considerable amount of time in a case of ost failure; and
2477 * when other sync requests do not get released lock from a client, the client
2478 * is evicted from the cluster -- such scenarious make the life difficult, so
2479 * release locks just after they are obtained. */
2480 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2481 __u64 *flags, union ldlm_policy_data *policy,
2482 struct ost_lvb *lvb, int kms_valid,
2483 osc_enqueue_upcall_f upcall, void *cookie,
2484 struct ldlm_enqueue_info *einfo,
2485 struct ptlrpc_request_set *rqset, int async,
2488 struct obd_device *obd = exp->exp_obd;
2489 struct lustre_handle lockh = { 0 };
2490 struct ptlrpc_request *req = NULL;
2491 int intent = *flags & LDLM_FL_HAS_INTENT;
2492 __u64 match_flags = *flags;
2493 enum ldlm_mode mode;
2497 /* Filesystem lock extents are extended to page boundaries so that
2498 * dealing with the page cache is a little smoother. */
2499 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2500 policy->l_extent.end |= ~PAGE_MASK;
2503 * kms is not valid when either object is completely fresh (so that no
2504 * locks are cached), or object was evicted. In the latter case cached
2505 * lock cannot be used, because it would prime inode state with
2506 * potentially stale LVB.
2511 /* Next, search for already existing extent locks that will cover us */
2512 /* If we're trying to read, we also search for an existing PW lock. The
2513 * VFS and page cache already protect us locally, so lots of readers/
2514 * writers can share a single PW lock.
2516 * There are problems with conversion deadlocks, so instead of
2517 * converting a read lock to a write lock, we'll just enqueue a new
2520 * At some point we should cancel the read lock instead of making them
2521 * send us a blocking callback, but there are problems with canceling
2522 * locks out from other users right now, too. */
2523 mode = einfo->ei_mode;
2524 if (einfo->ei_mode == LCK_PR)
2526 /* Normal lock requests must wait for the LVB to be ready before
2527 * matching a lock; speculative lock requests do not need to,
2528 * because they will not actually use the lock. */
2530 match_flags |= LDLM_FL_LVB_READY;
2532 match_flags |= LDLM_FL_BLOCK_GRANTED;
2533 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2534 einfo->ei_type, policy, mode, &lockh, 0);
2536 struct ldlm_lock *matched;
2538 if (*flags & LDLM_FL_TEST_LOCK)
2541 matched = ldlm_handle2lock(&lockh);
2543 /* This DLM lock request is speculative, and does not
2544 * have an associated IO request. Therefore if there
2545 * is already a DLM lock, it wll just inform the
2546 * caller to cancel the request for this stripe.*/
2547 lock_res_and_lock(matched);
2548 if (ldlm_extent_equal(&policy->l_extent,
2549 &matched->l_policy_data.l_extent))
2553 unlock_res_and_lock(matched);
2555 ldlm_lock_decref(&lockh, mode);
2556 LDLM_LOCK_PUT(matched);
2558 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2559 *flags |= LDLM_FL_LVB_READY;
2561 /* We already have a lock, and it's referenced. */
2562 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2564 ldlm_lock_decref(&lockh, mode);
2565 LDLM_LOCK_PUT(matched);
2568 ldlm_lock_decref(&lockh, mode);
2569 LDLM_LOCK_PUT(matched);
2574 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2578 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2579 &RQF_LDLM_ENQUEUE_LVB);
2583 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
2585 ptlrpc_request_free(req);
2589 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2591 ptlrpc_request_set_replen(req);
2594 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2595 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2597 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2598 sizeof(*lvb), LVB_T_OST, &lockh, async);
2601 struct osc_enqueue_args *aa;
2602 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2603 aa = ptlrpc_req_async_args(req);
2605 aa->oa_mode = einfo->ei_mode;
2606 aa->oa_type = einfo->ei_type;
2607 lustre_handle_copy(&aa->oa_lockh, &lockh);
2608 aa->oa_upcall = upcall;
2609 aa->oa_cookie = cookie;
2610 aa->oa_speculative = speculative;
2612 aa->oa_flags = flags;
2615 /* speculative locks are essentially to enqueue
2616 * a DLM lock in advance, so we don't care
2617 * about the result of the enqueue. */
2619 aa->oa_flags = NULL;
2622 req->rq_interpret_reply = osc_enqueue_interpret;
2623 if (rqset == PTLRPCD_SET)
2624 ptlrpcd_add_req(req);
2626 ptlrpc_set_add_req(rqset, req);
2627 } else if (intent) {
2628 ptlrpc_req_finished(req);
2633 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2634 flags, speculative, rc);
2636 ptlrpc_req_finished(req);
2641 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2642 enum ldlm_type type, union ldlm_policy_data *policy,
2643 enum ldlm_mode mode, __u64 *flags, void *data,
2644 struct lustre_handle *lockh, int unref)
2646 struct obd_device *obd = exp->exp_obd;
2647 __u64 lflags = *flags;
2651 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2654 /* Filesystem lock extents are extended to page boundaries so that
2655 * dealing with the page cache is a little smoother */
2656 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2657 policy->l_extent.end |= ~PAGE_MASK;
2659 /* Next, search for already existing extent locks that will cover us */
2660 /* If we're trying to read, we also search for an existing PW lock. The
2661 * VFS and page cache already protect us locally, so lots of readers/
2662 * writers can share a single PW lock. */
2666 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2667 res_id, type, policy, rc, lockh, unref);
2668 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2672 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2674 LASSERT(lock != NULL);
2675 if (!osc_set_lock_data(lock, data)) {
2676 ldlm_lock_decref(lockh, rc);
2679 LDLM_LOCK_PUT(lock);
2684 static int osc_statfs_interpret(const struct lu_env *env,
2685 struct ptlrpc_request *req, void *args, int rc)
2687 struct osc_async_args *aa = args;
2688 struct obd_statfs *msfs;
2693 * The request has in fact never been sent due to issues at
2694 * a higher level (LOV). Exit immediately since the caller
2695 * is aware of the problem and takes care of the clean up.
2699 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2700 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2706 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2708 GOTO(out, rc = -EPROTO);
2710 *aa->aa_oi->oi_osfs = *msfs;
2712 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2717 static int osc_statfs_async(struct obd_export *exp,
2718 struct obd_info *oinfo, time64_t max_age,
2719 struct ptlrpc_request_set *rqset)
2721 struct obd_device *obd = class_exp2obd(exp);
2722 struct ptlrpc_request *req;
2723 struct osc_async_args *aa;
2727 /* We could possibly pass max_age in the request (as an absolute
2728 * timestamp or a "seconds.usec ago") so the target can avoid doing
2729 * extra calls into the filesystem if that isn't necessary (e.g.
2730 * during mount that would help a bit). Having relative timestamps
2731 * is not so great if request processing is slow, while absolute
2732 * timestamps are not ideal because they need time synchronization. */
2733 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2737 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2739 ptlrpc_request_free(req);
2742 ptlrpc_request_set_replen(req);
2743 req->rq_request_portal = OST_CREATE_PORTAL;
2744 ptlrpc_at_set_req_timeout(req);
2746 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2747 /* procfs requests not want stat in wait for avoid deadlock */
2748 req->rq_no_resend = 1;
2749 req->rq_no_delay = 1;
2752 req->rq_interpret_reply = osc_statfs_interpret;
2753 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2754 aa = ptlrpc_req_async_args(req);
2757 ptlrpc_set_add_req(rqset, req);
2761 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2762 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
2764 struct obd_device *obd = class_exp2obd(exp);
2765 struct obd_statfs *msfs;
2766 struct ptlrpc_request *req;
2767 struct obd_import *imp = NULL;
2772 /*Since the request might also come from lprocfs, so we need
2773 *sync this with client_disconnect_export Bug15684*/
2774 down_read(&obd->u.cli.cl_sem);
2775 if (obd->u.cli.cl_import)
2776 imp = class_import_get(obd->u.cli.cl_import);
2777 up_read(&obd->u.cli.cl_sem);
2781 /* We could possibly pass max_age in the request (as an absolute
2782 * timestamp or a "seconds.usec ago") so the target can avoid doing
2783 * extra calls into the filesystem if that isn't necessary (e.g.
2784 * during mount that would help a bit). Having relative timestamps
2785 * is not so great if request processing is slow, while absolute
2786 * timestamps are not ideal because they need time synchronization. */
2787 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2789 class_import_put(imp);
2794 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2796 ptlrpc_request_free(req);
2799 ptlrpc_request_set_replen(req);
2800 req->rq_request_portal = OST_CREATE_PORTAL;
2801 ptlrpc_at_set_req_timeout(req);
2803 if (flags & OBD_STATFS_NODELAY) {
2804 /* procfs requests not want stat in wait for avoid deadlock */
2805 req->rq_no_resend = 1;
2806 req->rq_no_delay = 1;
2809 rc = ptlrpc_queue_wait(req);
2813 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2815 GOTO(out, rc = -EPROTO);
2821 ptlrpc_req_finished(req);
2825 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2826 void *karg, void __user *uarg)
2828 struct obd_device *obd = exp->exp_obd;
2829 struct obd_ioctl_data *data = karg;
2833 if (!try_module_get(THIS_MODULE)) {
2834 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2835 module_name(THIS_MODULE));
2839 case OBD_IOC_CLIENT_RECOVER:
2840 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2841 data->ioc_inlbuf1, 0);
2845 case IOC_OSC_SET_ACTIVE:
2846 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2849 case OBD_IOC_PING_TARGET:
2850 err = ptlrpc_obd_ping(obd);
2853 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2854 cmd, current_comm());
2855 GOTO(out, err = -ENOTTY);
2858 module_put(THIS_MODULE);
2862 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2863 u32 keylen, void *key, u32 vallen, void *val,
2864 struct ptlrpc_request_set *set)
2866 struct ptlrpc_request *req;
2867 struct obd_device *obd = exp->exp_obd;
2868 struct obd_import *imp = class_exp2cliimp(exp);
2873 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2875 if (KEY_IS(KEY_CHECKSUM)) {
2876 if (vallen != sizeof(int))
2878 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2882 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2883 sptlrpc_conf_client_adapt(obd);
2887 if (KEY_IS(KEY_FLUSH_CTX)) {
2888 sptlrpc_import_flush_my_ctx(imp);
2892 if (KEY_IS(KEY_CACHE_SET)) {
2893 struct client_obd *cli = &obd->u.cli;
2895 LASSERT(cli->cl_cache == NULL); /* only once */
2896 cli->cl_cache = (struct cl_client_cache *)val;
2897 cl_cache_incref(cli->cl_cache);
2898 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2900 /* add this osc into entity list */
2901 LASSERT(list_empty(&cli->cl_lru_osc));
2902 spin_lock(&cli->cl_cache->ccc_lru_lock);
2903 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2904 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2909 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2910 struct client_obd *cli = &obd->u.cli;
2911 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2912 long target = *(long *)val;
2914 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2919 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2922 /* We pass all other commands directly to OST. Since nobody calls osc
2923 methods directly and everybody is supposed to go through LOV, we
2924 assume lov checked invalid values for us.
2925 The only recognised values so far are evict_by_nid and mds_conn.
2926 Even if something bad goes through, we'd get a -EINVAL from OST
2929 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2930 &RQF_OST_SET_GRANT_INFO :
2935 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2936 RCL_CLIENT, keylen);
2937 if (!KEY_IS(KEY_GRANT_SHRINK))
2938 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2939 RCL_CLIENT, vallen);
2940 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2942 ptlrpc_request_free(req);
2946 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2947 memcpy(tmp, key, keylen);
2948 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2951 memcpy(tmp, val, vallen);
2953 if (KEY_IS(KEY_GRANT_SHRINK)) {
2954 struct osc_grant_args *aa;
2957 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2958 aa = ptlrpc_req_async_args(req);
2959 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2961 ptlrpc_req_finished(req);
2964 *oa = ((struct ost_body *)val)->oa;
2966 req->rq_interpret_reply = osc_shrink_grant_interpret;
2969 ptlrpc_request_set_replen(req);
2970 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2971 LASSERT(set != NULL);
2972 ptlrpc_set_add_req(set, req);
2973 ptlrpc_check_set(NULL, set);
2975 ptlrpcd_add_req(req);
2980 EXPORT_SYMBOL(osc_set_info_async);
2982 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
2983 struct obd_device *obd, struct obd_uuid *cluuid,
2984 struct obd_connect_data *data, void *localdata)
2986 struct client_obd *cli = &obd->u.cli;
2988 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2992 spin_lock(&cli->cl_loi_list_lock);
2993 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
2994 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM)
2995 grant += cli->cl_dirty_grant;
2997 grant += cli->cl_dirty_pages << PAGE_SHIFT;
2998 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
2999 lost_grant = cli->cl_lost_grant;
3000 cli->cl_lost_grant = 0;
3001 spin_unlock(&cli->cl_loi_list_lock);
3003 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
3004 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
3005 data->ocd_version, data->ocd_grant, lost_grant);
3010 EXPORT_SYMBOL(osc_reconnect);
3012 int osc_disconnect(struct obd_export *exp)
3014 struct obd_device *obd = class_exp2obd(exp);
3017 rc = client_disconnect_export(exp);
3019 * Initially we put del_shrink_grant before disconnect_export, but it
3020 * causes the following problem if setup (connect) and cleanup
3021 * (disconnect) are tangled together.
3022 * connect p1 disconnect p2
3023 * ptlrpc_connect_import
3024 * ............... class_manual_cleanup
3027 * ptlrpc_connect_interrupt
3029 * add this client to shrink list
3031 * Bang! grant shrink thread trigger the shrink. BUG18662
3033 osc_del_grant_list(&obd->u.cli);
3036 EXPORT_SYMBOL(osc_disconnect);
3038 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
3039 struct hlist_node *hnode, void *arg)
3041 struct lu_env *env = arg;
3042 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
3043 struct ldlm_lock *lock;
3044 struct osc_object *osc = NULL;
3048 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
3049 if (lock->l_ast_data != NULL && osc == NULL) {
3050 osc = lock->l_ast_data;
3051 cl_object_get(osc2cl(osc));
3054 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
3055 * by the 2nd round of ldlm_namespace_clean() call in
3056 * osc_import_event(). */
3057 ldlm_clear_cleaned(lock);
3062 osc_object_invalidate(env, osc);
3063 cl_object_put(env, osc2cl(osc));
3068 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
3070 static int osc_import_event(struct obd_device *obd,
3071 struct obd_import *imp,
3072 enum obd_import_event event)
3074 struct client_obd *cli;
3078 LASSERT(imp->imp_obd == obd);
3081 case IMP_EVENT_DISCON: {
3083 spin_lock(&cli->cl_loi_list_lock);
3084 cli->cl_avail_grant = 0;
3085 cli->cl_lost_grant = 0;
3086 spin_unlock(&cli->cl_loi_list_lock);
3089 case IMP_EVENT_INACTIVE: {
3090 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
3093 case IMP_EVENT_INVALIDATE: {
3094 struct ldlm_namespace *ns = obd->obd_namespace;
3098 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3100 env = cl_env_get(&refcheck);
3102 osc_io_unplug(env, &obd->u.cli, NULL);
3104 cfs_hash_for_each_nolock(ns->ns_rs_hash,
3105 osc_ldlm_resource_invalidate,
3107 cl_env_put(env, &refcheck);
3109 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3114 case IMP_EVENT_ACTIVE: {
3115 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
3118 case IMP_EVENT_OCD: {
3119 struct obd_connect_data *ocd = &imp->imp_connect_data;
3121 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3122 osc_init_grant(&obd->u.cli, ocd);
3125 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3126 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3128 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
3131 case IMP_EVENT_DEACTIVATE: {
3132 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
3135 case IMP_EVENT_ACTIVATE: {
3136 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
3140 CERROR("Unknown import event %d\n", event);
3147 * Determine whether the lock can be canceled before replaying the lock
3148 * during recovery, see bug16774 for detailed information.
3150 * \retval zero the lock can't be canceled
3151 * \retval other ok to cancel
3153 static int osc_cancel_weight(struct ldlm_lock *lock)
3156 * Cancel all unused and granted extent lock.
3158 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3159 lock->l_granted_mode == lock->l_req_mode &&
3160 osc_ldlm_weigh_ast(lock) == 0)
3166 static int brw_queue_work(const struct lu_env *env, void *data)
3168 struct client_obd *cli = data;
3170 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3172 osc_io_unplug(env, cli, NULL);
3176 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
3178 struct client_obd *cli = &obd->u.cli;
3184 rc = ptlrpcd_addref();
3188 rc = client_obd_setup(obd, lcfg);
3190 GOTO(out_ptlrpcd, rc);
3193 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3194 if (IS_ERR(handler))
3195 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3196 cli->cl_writeback_work = handler;
3198 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3199 if (IS_ERR(handler))
3200 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3201 cli->cl_lru_work = handler;
3203 rc = osc_quota_setup(obd);
3205 GOTO(out_ptlrpcd_work, rc);
3207 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3208 osc_update_next_shrink(cli);
3213 if (cli->cl_writeback_work != NULL) {
3214 ptlrpcd_destroy_work(cli->cl_writeback_work);
3215 cli->cl_writeback_work = NULL;
3217 if (cli->cl_lru_work != NULL) {
3218 ptlrpcd_destroy_work(cli->cl_lru_work);
3219 cli->cl_lru_work = NULL;
3221 client_obd_cleanup(obd);
3226 EXPORT_SYMBOL(osc_setup_common);
3228 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3230 struct client_obd *cli = &obd->u.cli;
3238 rc = osc_setup_common(obd, lcfg);
3242 rc = osc_tunables_init(obd);
3247 * We try to control the total number of requests with a upper limit
3248 * osc_reqpool_maxreqcount. There might be some race which will cause
3249 * over-limit allocation, but it is fine.
3251 req_count = atomic_read(&osc_pool_req_count);
3252 if (req_count < osc_reqpool_maxreqcount) {
3253 adding = cli->cl_max_rpcs_in_flight + 2;
3254 if (req_count + adding > osc_reqpool_maxreqcount)
3255 adding = osc_reqpool_maxreqcount - req_count;
3257 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3258 atomic_add(added, &osc_pool_req_count);
3261 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3263 spin_lock(&osc_shrink_lock);
3264 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3265 spin_unlock(&osc_shrink_lock);
3266 cli->cl_import->imp_idle_timeout = osc_idle_timeout;
3267 cli->cl_import->imp_idle_debug = D_HA;
3272 int osc_precleanup_common(struct obd_device *obd)
3274 struct client_obd *cli = &obd->u.cli;
3278 * for echo client, export may be on zombie list, wait for
3279 * zombie thread to cull it, because cli.cl_import will be
3280 * cleared in client_disconnect_export():
3281 * class_export_destroy() -> obd_cleanup() ->
3282 * echo_device_free() -> echo_client_cleanup() ->
3283 * obd_disconnect() -> osc_disconnect() ->
3284 * client_disconnect_export()
3286 obd_zombie_barrier();
3287 if (cli->cl_writeback_work) {
3288 ptlrpcd_destroy_work(cli->cl_writeback_work);
3289 cli->cl_writeback_work = NULL;
3292 if (cli->cl_lru_work) {
3293 ptlrpcd_destroy_work(cli->cl_lru_work);
3294 cli->cl_lru_work = NULL;
3297 obd_cleanup_client_import(obd);
3300 EXPORT_SYMBOL(osc_precleanup_common);
3302 static int osc_precleanup(struct obd_device *obd)
3306 osc_precleanup_common(obd);
3308 ptlrpc_lprocfs_unregister_obd(obd);
3312 int osc_cleanup_common(struct obd_device *obd)
3314 struct client_obd *cli = &obd->u.cli;
3319 spin_lock(&osc_shrink_lock);
3320 list_del(&cli->cl_shrink_list);
3321 spin_unlock(&osc_shrink_lock);
3324 if (cli->cl_cache != NULL) {
3325 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3326 spin_lock(&cli->cl_cache->ccc_lru_lock);
3327 list_del_init(&cli->cl_lru_osc);
3328 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3329 cli->cl_lru_left = NULL;
3330 cl_cache_decref(cli->cl_cache);
3331 cli->cl_cache = NULL;
3334 /* free memory of osc quota cache */
3335 osc_quota_cleanup(obd);
3337 rc = client_obd_cleanup(obd);
3342 EXPORT_SYMBOL(osc_cleanup_common);
3344 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3346 ssize_t count = class_modify_config(lcfg, PARAM_OSC,
3347 &obd->obd_kset.kobj);
3348 return count > 0 ? 0 : count;
3351 static int osc_process_config(struct obd_device *obd, size_t len, void *buf)
3353 return osc_process_config_base(obd, buf);
3356 static struct obd_ops osc_obd_ops = {
3357 .o_owner = THIS_MODULE,
3358 .o_setup = osc_setup,
3359 .o_precleanup = osc_precleanup,
3360 .o_cleanup = osc_cleanup_common,
3361 .o_add_conn = client_import_add_conn,
3362 .o_del_conn = client_import_del_conn,
3363 .o_connect = client_connect_import,
3364 .o_reconnect = osc_reconnect,
3365 .o_disconnect = osc_disconnect,
3366 .o_statfs = osc_statfs,
3367 .o_statfs_async = osc_statfs_async,
3368 .o_create = osc_create,
3369 .o_destroy = osc_destroy,
3370 .o_getattr = osc_getattr,
3371 .o_setattr = osc_setattr,
3372 .o_iocontrol = osc_iocontrol,
3373 .o_set_info_async = osc_set_info_async,
3374 .o_import_event = osc_import_event,
3375 .o_process_config = osc_process_config,
3376 .o_quotactl = osc_quotactl,
3379 static struct shrinker *osc_cache_shrinker;
3380 struct list_head osc_shrink_list = LIST_HEAD_INIT(osc_shrink_list);
3381 DEFINE_SPINLOCK(osc_shrink_lock);
3383 #ifndef HAVE_SHRINKER_COUNT
3384 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3386 struct shrink_control scv = {
3387 .nr_to_scan = shrink_param(sc, nr_to_scan),
3388 .gfp_mask = shrink_param(sc, gfp_mask)
3390 #if !defined(HAVE_SHRINKER_WANT_SHRINK_PTR) && !defined(HAVE_SHRINK_CONTROL)
3391 struct shrinker *shrinker = NULL;
3394 (void)osc_cache_shrink_scan(shrinker, &scv);
3396 return osc_cache_shrink_count(shrinker, &scv);
3400 static int __init osc_init(void)
3402 bool enable_proc = true;
3403 struct obd_type *type;
3404 unsigned int reqpool_size;
3405 unsigned int reqsize;
3407 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3408 osc_cache_shrink_count, osc_cache_shrink_scan);
3411 /* print an address of _any_ initialized kernel symbol from this
3412 * module, to allow debugging with gdb that doesn't support data
3413 * symbols from modules.*/
3414 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3416 rc = lu_kmem_init(osc_caches);
3420 type = class_search_type(LUSTRE_OSP_NAME);
3421 if (type != NULL && type->typ_procsym != NULL)
3422 enable_proc = false;
3424 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
3425 LUSTRE_OSC_NAME, &osc_device_type);
3429 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3431 /* This is obviously too much memory, only prevent overflow here */
3432 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3433 GOTO(out_type, rc = -EINVAL);
3435 reqpool_size = osc_reqpool_mem_max << 20;
3438 while (reqsize < OST_IO_MAXREQSIZE)
3439 reqsize = reqsize << 1;
3442 * We don't enlarge the request count in OSC pool according to
3443 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3444 * tried after normal allocation failed. So a small OSC pool won't
3445 * cause much performance degression in most of cases.
3447 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3449 atomic_set(&osc_pool_req_count, 0);
3450 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3451 ptlrpc_add_rqs_to_pool);
3453 if (osc_rq_pool == NULL)
3454 GOTO(out_type, rc = -ENOMEM);
3456 rc = osc_start_grant_work();
3458 GOTO(out_req_pool, rc);
3463 ptlrpc_free_rq_pool(osc_rq_pool);
3465 class_unregister_type(LUSTRE_OSC_NAME);
3467 lu_kmem_fini(osc_caches);
3472 static void __exit osc_exit(void)
3474 osc_stop_grant_work();
3475 remove_shrinker(osc_cache_shrinker);
3476 class_unregister_type(LUSTRE_OSC_NAME);
3477 lu_kmem_fini(osc_caches);
3478 ptlrpc_free_rq_pool(osc_rq_pool);
3481 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3482 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3483 MODULE_VERSION(LUSTRE_VERSION_STRING);
3484 MODULE_LICENSE("GPL");
3486 module_init(osc_init);
3487 module_exit(osc_exit);