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 <libcfs/libcfs.h>
37 #include <linux/falloc.h>
38 #include <lprocfs_status.h>
39 #include <lustre_dlm.h>
40 #include <lustre_fid.h>
41 #include <lustre_ha.h>
42 #include <uapi/linux/lustre/lustre_ioctl.h>
43 #include <lustre_net.h>
44 #include <lustre_obdo.h>
46 #include <obd_cksum.h>
47 #include <obd_class.h>
48 #include <lustre_osc.h>
49 #include <linux/falloc.h>
51 #include "osc_internal.h"
53 atomic_t osc_pool_req_count;
54 unsigned int osc_reqpool_maxreqcount;
55 struct ptlrpc_request_pool *osc_rq_pool;
57 /* max memory used for request pool, unit is MB */
58 static unsigned int osc_reqpool_mem_max = 5;
59 module_param(osc_reqpool_mem_max, uint, 0444);
61 static int osc_idle_timeout = 20;
62 module_param(osc_idle_timeout, uint, 0644);
64 #define osc_grant_args osc_brw_async_args
66 struct osc_setattr_args {
68 obd_enqueue_update_f sa_upcall;
72 struct osc_fsync_args {
73 struct osc_object *fa_obj;
75 obd_enqueue_update_f fa_upcall;
79 struct osc_ladvise_args {
81 obd_enqueue_update_f la_upcall;
85 static void osc_release_ppga(struct brw_page **ppga, size_t count);
86 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
89 void osc_pack_req_body(struct ptlrpc_request *req, struct obdo *oa)
91 struct ost_body *body;
93 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
96 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
99 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
102 struct ptlrpc_request *req;
103 struct ost_body *body;
107 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
111 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
113 ptlrpc_request_free(req);
117 osc_pack_req_body(req, oa);
119 ptlrpc_request_set_replen(req);
121 rc = ptlrpc_queue_wait(req);
125 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
127 GOTO(out, rc = -EPROTO);
129 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
130 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
132 oa->o_blksize = cli_brw_size(exp->exp_obd);
133 oa->o_valid |= OBD_MD_FLBLKSZ;
137 ptlrpc_req_finished(req);
142 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
145 struct ptlrpc_request *req;
146 struct ost_body *body;
150 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
152 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
156 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
158 ptlrpc_request_free(req);
162 osc_pack_req_body(req, oa);
164 ptlrpc_request_set_replen(req);
166 rc = ptlrpc_queue_wait(req);
170 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
172 GOTO(out, rc = -EPROTO);
174 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
178 ptlrpc_req_finished(req);
183 static int osc_setattr_interpret(const struct lu_env *env,
184 struct ptlrpc_request *req, void *args, int rc)
186 struct osc_setattr_args *sa = args;
187 struct ost_body *body;
194 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
196 GOTO(out, rc = -EPROTO);
198 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
201 rc = sa->sa_upcall(sa->sa_cookie, rc);
205 int osc_setattr_async(struct obd_export *exp, struct obdo *oa,
206 obd_enqueue_update_f upcall, void *cookie,
207 struct ptlrpc_request_set *rqset)
209 struct ptlrpc_request *req;
210 struct osc_setattr_args *sa;
215 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
219 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
221 ptlrpc_request_free(req);
225 osc_pack_req_body(req, oa);
227 ptlrpc_request_set_replen(req);
229 /* do mds to ost setattr asynchronously */
231 /* Do not wait for response. */
232 ptlrpcd_add_req(req);
234 req->rq_interpret_reply = osc_setattr_interpret;
236 sa = ptlrpc_req_async_args(sa, req);
238 sa->sa_upcall = upcall;
239 sa->sa_cookie = cookie;
241 ptlrpc_set_add_req(rqset, req);
247 static int osc_ladvise_interpret(const struct lu_env *env,
248 struct ptlrpc_request *req,
251 struct osc_ladvise_args *la = arg;
252 struct ost_body *body;
258 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
260 GOTO(out, rc = -EPROTO);
262 *la->la_oa = body->oa;
264 rc = la->la_upcall(la->la_cookie, rc);
269 * If rqset is NULL, do not wait for response. Upcall and cookie could also
270 * be NULL in this case
272 int osc_ladvise_base(struct obd_export *exp, struct obdo *oa,
273 struct ladvise_hdr *ladvise_hdr,
274 obd_enqueue_update_f upcall, void *cookie,
275 struct ptlrpc_request_set *rqset)
277 struct ptlrpc_request *req;
278 struct ost_body *body;
279 struct osc_ladvise_args *la;
281 struct lu_ladvise *req_ladvise;
282 struct lu_ladvise *ladvise = ladvise_hdr->lah_advise;
283 int num_advise = ladvise_hdr->lah_count;
284 struct ladvise_hdr *req_ladvise_hdr;
287 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_LADVISE);
291 req_capsule_set_size(&req->rq_pill, &RMF_OST_LADVISE, RCL_CLIENT,
292 num_advise * sizeof(*ladvise));
293 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_LADVISE);
295 ptlrpc_request_free(req);
298 req->rq_request_portal = OST_IO_PORTAL;
299 ptlrpc_at_set_req_timeout(req);
301 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
303 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
306 req_ladvise_hdr = req_capsule_client_get(&req->rq_pill,
307 &RMF_OST_LADVISE_HDR);
308 memcpy(req_ladvise_hdr, ladvise_hdr, sizeof(*ladvise_hdr));
310 req_ladvise = req_capsule_client_get(&req->rq_pill, &RMF_OST_LADVISE);
311 memcpy(req_ladvise, ladvise, sizeof(*ladvise) * num_advise);
312 ptlrpc_request_set_replen(req);
315 /* Do not wait for response. */
316 ptlrpcd_add_req(req);
320 req->rq_interpret_reply = osc_ladvise_interpret;
321 la = ptlrpc_req_async_args(la, req);
323 la->la_upcall = upcall;
324 la->la_cookie = cookie;
326 ptlrpc_set_add_req(rqset, req);
331 static int osc_create(const struct lu_env *env, struct obd_export *exp,
334 struct ptlrpc_request *req;
335 struct ost_body *body;
340 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
341 LASSERT(fid_seq_is_echo(ostid_seq(&oa->o_oi)));
343 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
345 GOTO(out, rc = -ENOMEM);
347 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
349 ptlrpc_request_free(req);
353 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
356 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
358 ptlrpc_request_set_replen(req);
360 rc = ptlrpc_queue_wait(req);
364 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
366 GOTO(out_req, rc = -EPROTO);
368 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
369 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
371 oa->o_blksize = cli_brw_size(exp->exp_obd);
372 oa->o_valid |= OBD_MD_FLBLKSZ;
374 CDEBUG(D_HA, "transno: %lld\n",
375 lustre_msg_get_transno(req->rq_repmsg));
377 ptlrpc_req_finished(req);
382 int osc_punch_send(struct obd_export *exp, struct obdo *oa,
383 obd_enqueue_update_f upcall, void *cookie)
385 struct ptlrpc_request *req;
386 struct osc_setattr_args *sa;
387 struct obd_import *imp = class_exp2cliimp(exp);
388 struct ost_body *body;
393 req = ptlrpc_request_alloc(imp, &RQF_OST_PUNCH);
397 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
399 ptlrpc_request_free(req);
403 osc_set_io_portal(req);
405 ptlrpc_at_set_req_timeout(req);
407 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
409 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
411 ptlrpc_request_set_replen(req);
413 req->rq_interpret_reply = osc_setattr_interpret;
414 sa = ptlrpc_req_async_args(sa, req);
416 sa->sa_upcall = upcall;
417 sa->sa_cookie = cookie;
419 ptlrpcd_add_req(req);
423 EXPORT_SYMBOL(osc_punch_send);
426 * osc_fallocate_base() - Handles fallocate request.
428 * @exp: Export structure
429 * @oa: Attributes passed to OSS from client (obdo structure)
430 * @upcall: Primary & supplementary group information
431 * @cookie: Exclusive identifier
432 * @rqset: Request list.
433 * @mode: Operation done on given range.
435 * osc_fallocate_base() - Handles fallocate requests only. Only block
436 * allocation or standard preallocate operation is supported currently.
437 * Other mode flags is not supported yet. ftruncate(2) or truncate(2)
438 * is supported via SETATTR request.
440 * Return: Non-zero on failure and O on success.
442 int osc_fallocate_base(struct obd_export *exp, struct obdo *oa,
443 obd_enqueue_update_f upcall, void *cookie, int mode)
445 struct ptlrpc_request *req;
446 struct osc_setattr_args *sa;
447 struct ost_body *body;
448 struct obd_import *imp = class_exp2cliimp(exp);
453 * Only mode == 0 (which is standard prealloc) is supported now.
454 * Punch is not supported yet.
456 if (mode & ~FALLOC_FL_KEEP_SIZE)
458 oa->o_falloc_mode = mode;
460 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
465 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_FALLOCATE);
467 ptlrpc_request_free(req);
471 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
474 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
476 ptlrpc_request_set_replen(req);
478 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
479 BUILD_BUG_ON(sizeof(*sa) > sizeof(req->rq_async_args));
480 sa = ptlrpc_req_async_args(sa, req);
482 sa->sa_upcall = upcall;
483 sa->sa_cookie = cookie;
485 ptlrpcd_add_req(req);
490 static int osc_sync_interpret(const struct lu_env *env,
491 struct ptlrpc_request *req, void *args, int rc)
493 struct osc_fsync_args *fa = args;
494 struct ost_body *body;
495 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
496 unsigned long valid = 0;
497 struct cl_object *obj;
503 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
505 CERROR("can't unpack ost_body\n");
506 GOTO(out, rc = -EPROTO);
509 *fa->fa_oa = body->oa;
510 obj = osc2cl(fa->fa_obj);
512 /* Update osc object's blocks attribute */
513 cl_object_attr_lock(obj);
514 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
515 attr->cat_blocks = body->oa.o_blocks;
520 cl_object_attr_update(env, obj, attr, valid);
521 cl_object_attr_unlock(obj);
524 rc = fa->fa_upcall(fa->fa_cookie, rc);
528 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
529 obd_enqueue_update_f upcall, void *cookie,
530 struct ptlrpc_request_set *rqset)
532 struct obd_export *exp = osc_export(obj);
533 struct ptlrpc_request *req;
534 struct ost_body *body;
535 struct osc_fsync_args *fa;
539 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
543 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
545 ptlrpc_request_free(req);
549 /* overload the size and blocks fields in the oa with start/end */
550 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
552 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
554 ptlrpc_request_set_replen(req);
555 req->rq_interpret_reply = osc_sync_interpret;
557 fa = ptlrpc_req_async_args(fa, req);
560 fa->fa_upcall = upcall;
561 fa->fa_cookie = cookie;
563 ptlrpc_set_add_req(rqset, req);
568 /* Find and cancel locally locks matched by @mode in the resource found by
569 * @objid. Found locks are added into @cancel list. Returns the amount of
570 * locks added to @cancels list. */
571 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
572 struct list_head *cancels,
573 enum ldlm_mode mode, __u64 lock_flags)
575 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
576 struct ldlm_res_id res_id;
577 struct ldlm_resource *res;
581 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
582 * export) but disabled through procfs (flag in NS).
584 * This distinguishes from a case when ELC is not supported originally,
585 * when we still want to cancel locks in advance and just cancel them
586 * locally, without sending any RPC. */
587 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
590 ostid_build_res_name(&oa->o_oi, &res_id);
591 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
595 LDLM_RESOURCE_ADDREF(res);
596 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
597 lock_flags, 0, NULL);
598 LDLM_RESOURCE_DELREF(res);
599 ldlm_resource_putref(res);
603 static int osc_destroy_interpret(const struct lu_env *env,
604 struct ptlrpc_request *req, void *args, int rc)
606 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
608 atomic_dec(&cli->cl_destroy_in_flight);
609 wake_up(&cli->cl_destroy_waitq);
614 static int osc_can_send_destroy(struct client_obd *cli)
616 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
617 cli->cl_max_rpcs_in_flight) {
618 /* The destroy request can be sent */
621 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
622 cli->cl_max_rpcs_in_flight) {
624 * The counter has been modified between the two atomic
627 wake_up(&cli->cl_destroy_waitq);
632 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
635 struct client_obd *cli = &exp->exp_obd->u.cli;
636 struct ptlrpc_request *req;
637 struct ost_body *body;
643 CDEBUG(D_INFO, "oa NULL\n");
647 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
648 LDLM_FL_DISCARD_DATA);
650 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
652 ldlm_lock_list_put(&cancels, l_bl_ast, count);
656 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
659 ptlrpc_request_free(req);
663 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
664 ptlrpc_at_set_req_timeout(req);
666 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
668 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
670 ptlrpc_request_set_replen(req);
672 req->rq_interpret_reply = osc_destroy_interpret;
673 if (!osc_can_send_destroy(cli)) {
675 * Wait until the number of on-going destroy RPCs drops
676 * under max_rpc_in_flight
678 rc = l_wait_event_abortable_exclusive(
679 cli->cl_destroy_waitq,
680 osc_can_send_destroy(cli));
682 ptlrpc_req_finished(req);
687 /* Do not wait for response */
688 ptlrpcd_add_req(req);
692 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
695 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
697 LASSERT(!(oa->o_valid & bits));
700 spin_lock(&cli->cl_loi_list_lock);
701 if (cli->cl_ocd_grant_param)
702 oa->o_dirty = cli->cl_dirty_grant;
704 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
705 if (unlikely(cli->cl_dirty_pages > cli->cl_dirty_max_pages)) {
706 CERROR("dirty %lu > dirty_max %lu\n",
708 cli->cl_dirty_max_pages);
710 } else if (unlikely(atomic_long_read(&obd_dirty_pages) >
711 (long)(obd_max_dirty_pages + 1))) {
712 /* The atomic_read() allowing the atomic_inc() are
713 * not covered by a lock thus they may safely race and trip
714 * this CERROR() unless we add in a small fudge factor (+1). */
715 CERROR("%s: dirty %ld > system dirty_max %ld\n",
716 cli_name(cli), atomic_long_read(&obd_dirty_pages),
717 obd_max_dirty_pages);
719 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
721 CERROR("dirty %lu - dirty_max %lu too big???\n",
722 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
725 unsigned long nrpages;
726 unsigned long undirty;
728 nrpages = cli->cl_max_pages_per_rpc;
729 nrpages *= cli->cl_max_rpcs_in_flight + 1;
730 nrpages = max(nrpages, cli->cl_dirty_max_pages);
731 undirty = nrpages << PAGE_SHIFT;
732 if (cli->cl_ocd_grant_param) {
735 /* take extent tax into account when asking for more
737 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
738 cli->cl_max_extent_pages;
739 undirty += nrextents * cli->cl_grant_extent_tax;
741 /* Do not ask for more than OBD_MAX_GRANT - a margin for server
742 * to add extent tax, etc.
744 oa->o_undirty = min(undirty, OBD_MAX_GRANT &
745 ~(PTLRPC_MAX_BRW_SIZE * 4UL));
747 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
748 /* o_dropped AKA o_misc is 32 bits, but cl_lost_grant is 64 bits */
749 if (cli->cl_lost_grant > INT_MAX) {
751 "%s: avoided o_dropped overflow: cl_lost_grant %lu\n",
752 cli_name(cli), cli->cl_lost_grant);
753 oa->o_dropped = INT_MAX;
755 oa->o_dropped = cli->cl_lost_grant;
757 cli->cl_lost_grant -= oa->o_dropped;
758 spin_unlock(&cli->cl_loi_list_lock);
759 CDEBUG(D_CACHE, "%s: dirty: %llu undirty: %u dropped %u grant: %llu"
760 " cl_lost_grant %lu\n", cli_name(cli), oa->o_dirty,
761 oa->o_undirty, oa->o_dropped, oa->o_grant, cli->cl_lost_grant);
764 void osc_update_next_shrink(struct client_obd *cli)
766 cli->cl_next_shrink_grant = ktime_get_seconds() +
767 cli->cl_grant_shrink_interval;
769 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
770 cli->cl_next_shrink_grant);
773 static void __osc_update_grant(struct client_obd *cli, u64 grant)
775 spin_lock(&cli->cl_loi_list_lock);
776 cli->cl_avail_grant += grant;
777 spin_unlock(&cli->cl_loi_list_lock);
780 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
782 if (body->oa.o_valid & OBD_MD_FLGRANT) {
783 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
784 __osc_update_grant(cli, body->oa.o_grant);
789 * grant thread data for shrinking space.
791 struct grant_thread_data {
792 struct list_head gtd_clients;
793 struct mutex gtd_mutex;
794 unsigned long gtd_stopped:1;
796 static struct grant_thread_data client_gtd;
798 static int osc_shrink_grant_interpret(const struct lu_env *env,
799 struct ptlrpc_request *req,
802 struct osc_grant_args *aa = args;
803 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
804 struct ost_body *body;
807 __osc_update_grant(cli, aa->aa_oa->o_grant);
811 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
813 osc_update_grant(cli, body);
815 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
821 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
823 spin_lock(&cli->cl_loi_list_lock);
824 oa->o_grant = cli->cl_avail_grant / 4;
825 cli->cl_avail_grant -= oa->o_grant;
826 spin_unlock(&cli->cl_loi_list_lock);
827 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
828 oa->o_valid |= OBD_MD_FLFLAGS;
831 oa->o_flags |= OBD_FL_SHRINK_GRANT;
832 osc_update_next_shrink(cli);
835 /* Shrink the current grant, either from some large amount to enough for a
836 * full set of in-flight RPCs, or if we have already shrunk to that limit
837 * then to enough for a single RPC. This avoids keeping more grant than
838 * needed, and avoids shrinking the grant piecemeal. */
839 static int osc_shrink_grant(struct client_obd *cli)
841 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
842 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
844 spin_lock(&cli->cl_loi_list_lock);
845 if (cli->cl_avail_grant <= target_bytes)
846 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
847 spin_unlock(&cli->cl_loi_list_lock);
849 return osc_shrink_grant_to_target(cli, target_bytes);
852 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
855 struct ost_body *body;
858 spin_lock(&cli->cl_loi_list_lock);
859 /* Don't shrink if we are already above or below the desired limit
860 * We don't want to shrink below a single RPC, as that will negatively
861 * impact block allocation and long-term performance. */
862 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
863 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
865 if (target_bytes >= cli->cl_avail_grant) {
866 spin_unlock(&cli->cl_loi_list_lock);
869 spin_unlock(&cli->cl_loi_list_lock);
875 osc_announce_cached(cli, &body->oa, 0);
877 spin_lock(&cli->cl_loi_list_lock);
878 if (target_bytes >= cli->cl_avail_grant) {
879 /* available grant has changed since target calculation */
880 spin_unlock(&cli->cl_loi_list_lock);
881 GOTO(out_free, rc = 0);
883 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
884 cli->cl_avail_grant = target_bytes;
885 spin_unlock(&cli->cl_loi_list_lock);
886 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
887 body->oa.o_valid |= OBD_MD_FLFLAGS;
888 body->oa.o_flags = 0;
890 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
891 osc_update_next_shrink(cli);
893 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
894 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
895 sizeof(*body), body, NULL);
897 __osc_update_grant(cli, body->oa.o_grant);
903 static int osc_should_shrink_grant(struct client_obd *client)
905 time64_t next_shrink = client->cl_next_shrink_grant;
907 if (client->cl_import == NULL)
910 if (!OCD_HAS_FLAG(&client->cl_import->imp_connect_data, GRANT_SHRINK) ||
911 client->cl_import->imp_grant_shrink_disabled) {
912 osc_update_next_shrink(client);
916 if (ktime_get_seconds() >= next_shrink - 5) {
917 /* Get the current RPC size directly, instead of going via:
918 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
919 * Keep comment here so that it can be found by searching. */
920 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
922 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
923 client->cl_avail_grant > brw_size)
926 osc_update_next_shrink(client);
931 #define GRANT_SHRINK_RPC_BATCH 100
933 static struct delayed_work work;
935 static void osc_grant_work_handler(struct work_struct *data)
937 struct client_obd *cli;
939 bool init_next_shrink = true;
940 time64_t next_shrink = ktime_get_seconds() + GRANT_SHRINK_INTERVAL;
943 mutex_lock(&client_gtd.gtd_mutex);
944 list_for_each_entry(cli, &client_gtd.gtd_clients,
946 if (rpc_sent < GRANT_SHRINK_RPC_BATCH &&
947 osc_should_shrink_grant(cli)) {
948 osc_shrink_grant(cli);
952 if (!init_next_shrink) {
953 if (cli->cl_next_shrink_grant < next_shrink &&
954 cli->cl_next_shrink_grant > ktime_get_seconds())
955 next_shrink = cli->cl_next_shrink_grant;
957 init_next_shrink = false;
958 next_shrink = cli->cl_next_shrink_grant;
961 mutex_unlock(&client_gtd.gtd_mutex);
963 if (client_gtd.gtd_stopped == 1)
966 if (next_shrink > ktime_get_seconds()) {
967 time64_t delay = next_shrink - ktime_get_seconds();
969 schedule_delayed_work(&work, cfs_time_seconds(delay));
971 schedule_work(&work.work);
975 void osc_schedule_grant_work(void)
977 cancel_delayed_work_sync(&work);
978 schedule_work(&work.work);
982 * Start grant thread for returing grant to server for idle clients.
984 static int osc_start_grant_work(void)
986 client_gtd.gtd_stopped = 0;
987 mutex_init(&client_gtd.gtd_mutex);
988 INIT_LIST_HEAD(&client_gtd.gtd_clients);
990 INIT_DELAYED_WORK(&work, osc_grant_work_handler);
991 schedule_work(&work.work);
996 static void osc_stop_grant_work(void)
998 client_gtd.gtd_stopped = 1;
999 cancel_delayed_work_sync(&work);
1002 static void osc_add_grant_list(struct client_obd *client)
1004 mutex_lock(&client_gtd.gtd_mutex);
1005 list_add(&client->cl_grant_chain, &client_gtd.gtd_clients);
1006 mutex_unlock(&client_gtd.gtd_mutex);
1009 static void osc_del_grant_list(struct client_obd *client)
1011 if (list_empty(&client->cl_grant_chain))
1014 mutex_lock(&client_gtd.gtd_mutex);
1015 list_del_init(&client->cl_grant_chain);
1016 mutex_unlock(&client_gtd.gtd_mutex);
1019 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1022 * ocd_grant is the total grant amount we're expect to hold: if we've
1023 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
1024 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
1027 * race is tolerable here: if we're evicted, but imp_state already
1028 * left EVICTED state, then cl_dirty_pages must be 0 already.
1030 spin_lock(&cli->cl_loi_list_lock);
1031 cli->cl_avail_grant = ocd->ocd_grant;
1032 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
1033 unsigned long consumed = cli->cl_reserved_grant;
1035 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
1036 consumed += cli->cl_dirty_grant;
1038 consumed += cli->cl_dirty_pages << PAGE_SHIFT;
1039 if (cli->cl_avail_grant < consumed) {
1040 CERROR("%s: granted %ld but already consumed %ld\n",
1041 cli_name(cli), cli->cl_avail_grant, consumed);
1042 cli->cl_avail_grant = 0;
1044 cli->cl_avail_grant -= consumed;
1048 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
1052 /* overhead for each extent insertion */
1053 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
1054 /* determine the appropriate chunk size used by osc_extent. */
1055 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
1056 ocd->ocd_grant_blkbits);
1057 /* max_pages_per_rpc must be chunk aligned */
1058 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
1059 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
1060 ~chunk_mask) & chunk_mask;
1061 /* determine maximum extent size, in #pages */
1062 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
1063 cli->cl_max_extent_pages = (size >> PAGE_SHIFT) ?: 1;
1064 cli->cl_ocd_grant_param = 1;
1066 cli->cl_ocd_grant_param = 0;
1067 cli->cl_grant_extent_tax = 0;
1068 cli->cl_chunkbits = PAGE_SHIFT;
1069 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
1071 spin_unlock(&cli->cl_loi_list_lock);
1074 "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld. chunk bits: %d cl_max_extent_pages: %d\n",
1076 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
1077 cli->cl_max_extent_pages);
1079 if (OCD_HAS_FLAG(ocd, GRANT_SHRINK) && list_empty(&cli->cl_grant_chain))
1080 osc_add_grant_list(cli);
1082 EXPORT_SYMBOL(osc_init_grant);
1084 /* We assume that the reason this OSC got a short read is because it read
1085 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1086 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1087 * this stripe never got written at or beyond this stripe offset yet. */
1088 static void handle_short_read(int nob_read, size_t page_count,
1089 struct brw_page **pga)
1094 /* skip bytes read OK */
1095 while (nob_read > 0) {
1096 LASSERT (page_count > 0);
1098 if (pga[i]->count > nob_read) {
1099 /* EOF inside this page */
1100 ptr = kmap(pga[i]->pg) +
1101 (pga[i]->off & ~PAGE_MASK);
1102 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1109 nob_read -= pga[i]->count;
1114 /* zero remaining pages */
1115 while (page_count-- > 0) {
1116 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
1117 memset(ptr, 0, pga[i]->count);
1123 static int check_write_rcs(struct ptlrpc_request *req,
1124 int requested_nob, int niocount,
1125 size_t page_count, struct brw_page **pga)
1130 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1131 sizeof(*remote_rcs) *
1133 if (remote_rcs == NULL) {
1134 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1138 /* return error if any niobuf was in error */
1139 for (i = 0; i < niocount; i++) {
1140 if ((int)remote_rcs[i] < 0) {
1141 CDEBUG(D_INFO, "rc[%d]: %d req %p\n",
1142 i, remote_rcs[i], req);
1143 return remote_rcs[i];
1146 if (remote_rcs[i] != 0) {
1147 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1148 i, remote_rcs[i], req);
1152 if (req->rq_bulk != NULL &&
1153 req->rq_bulk->bd_nob_transferred != requested_nob) {
1154 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1155 req->rq_bulk->bd_nob_transferred, requested_nob);
1162 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1164 if (p1->flag != p2->flag) {
1165 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1166 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1167 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1169 /* warn if we try to combine flags that we don't know to be
1170 * safe to combine */
1171 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1172 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1173 "report this at https://jira.whamcloud.com/\n",
1174 p1->flag, p2->flag);
1179 return (p1->off + p1->count == p2->off);
1182 #if IS_ENABLED(CONFIG_CRC_T10DIF)
1183 static int osc_checksum_bulk_t10pi(const char *obd_name, int nob,
1184 size_t pg_count, struct brw_page **pga,
1185 int opc, obd_dif_csum_fn *fn,
1189 struct ahash_request *req;
1190 /* Used Adler as the default checksum type on top of DIF tags */
1191 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1192 struct page *__page;
1193 unsigned char *buffer;
1195 unsigned int bufsize;
1197 int used_number = 0;
1203 LASSERT(pg_count > 0);
1205 __page = alloc_page(GFP_KERNEL);
1209 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1212 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
1213 obd_name, cfs_crypto_hash_name(cfs_alg), rc);
1217 buffer = kmap(__page);
1218 guard_start = (__u16 *)buffer;
1219 guard_number = PAGE_SIZE / sizeof(*guard_start);
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 (unlikely(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));
1235 * The left guard number should be able to hold checksums of a
1238 rc = obd_page_dif_generate_buffer(obd_name, pga[i]->pg,
1239 pga[i]->off & ~PAGE_MASK,
1241 guard_start + used_number,
1242 guard_number - used_number,
1248 used_number += used;
1249 if (used_number == guard_number) {
1250 cfs_crypto_hash_update_page(req, __page, 0,
1251 used_number * sizeof(*guard_start));
1255 nob -= pga[i]->count;
1263 if (used_number != 0)
1264 cfs_crypto_hash_update_page(req, __page, 0,
1265 used_number * sizeof(*guard_start));
1267 bufsize = sizeof(cksum);
1268 cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
1270 /* For sending we only compute the wrong checksum instead
1271 * of corrupting the data so it is still correct on a redo */
1272 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1277 __free_page(__page);
1280 #else /* !CONFIG_CRC_T10DIF */
1281 #define obd_dif_ip_fn NULL
1282 #define obd_dif_crc_fn NULL
1283 #define osc_checksum_bulk_t10pi(name, nob, pgc, pga, opc, fn, ssize, csum) \
1285 #endif /* CONFIG_CRC_T10DIF */
1287 static int osc_checksum_bulk(int nob, size_t pg_count,
1288 struct brw_page **pga, int opc,
1289 enum cksum_types cksum_type,
1293 struct ahash_request *req;
1294 unsigned int bufsize;
1295 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1297 LASSERT(pg_count > 0);
1299 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1301 CERROR("Unable to initialize checksum hash %s\n",
1302 cfs_crypto_hash_name(cfs_alg));
1303 return PTR_ERR(req);
1306 while (nob > 0 && pg_count > 0) {
1307 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1309 /* corrupt the data before we compute the checksum, to
1310 * simulate an OST->client data error */
1311 if (i == 0 && opc == OST_READ &&
1312 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1313 unsigned char *ptr = kmap(pga[i]->pg);
1314 int off = pga[i]->off & ~PAGE_MASK;
1316 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1319 cfs_crypto_hash_update_page(req, pga[i]->pg,
1320 pga[i]->off & ~PAGE_MASK,
1322 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1323 (int)(pga[i]->off & ~PAGE_MASK));
1325 nob -= pga[i]->count;
1330 bufsize = sizeof(*cksum);
1331 cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1333 /* For sending we only compute the wrong checksum instead
1334 * of corrupting the data so it is still correct on a redo */
1335 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1341 static int osc_checksum_bulk_rw(const char *obd_name,
1342 enum cksum_types cksum_type,
1343 int nob, size_t pg_count,
1344 struct brw_page **pga, int opc,
1347 obd_dif_csum_fn *fn = NULL;
1348 int sector_size = 0;
1352 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
1355 rc = osc_checksum_bulk_t10pi(obd_name, nob, pg_count, pga,
1356 opc, fn, sector_size, check_sum);
1358 rc = osc_checksum_bulk(nob, pg_count, pga, opc, cksum_type,
1364 static inline void osc_release_bounce_pages(struct brw_page **pga,
1367 #ifdef HAVE_LUSTRE_CRYPTO
1370 for (i = 0; i < page_count; i++) {
1371 /* Bounce pages allocated by a call to
1372 * llcrypt_encrypt_pagecache_blocks() in osc_brw_prep_request()
1373 * are identified thanks to the PageChecked flag.
1375 if (PageChecked(pga[i]->pg))
1376 llcrypt_finalize_bounce_page(&pga[i]->pg);
1377 pga[i]->count -= pga[i]->bp_count_diff;
1378 pga[i]->off += pga[i]->bp_off_diff;
1384 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1385 u32 page_count, struct brw_page **pga,
1386 struct ptlrpc_request **reqp, int resend)
1388 struct ptlrpc_request *req;
1389 struct ptlrpc_bulk_desc *desc;
1390 struct ost_body *body;
1391 struct obd_ioobj *ioobj;
1392 struct niobuf_remote *niobuf;
1393 int niocount, i, requested_nob, opc, rc, short_io_size = 0;
1394 struct osc_brw_async_args *aa;
1395 struct req_capsule *pill;
1396 struct brw_page *pg_prev;
1398 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1399 struct inode *inode;
1400 bool directio = false;
1403 inode = page2inode(pga[0]->pg);
1404 if (inode == NULL) {
1405 /* Try to get reference to inode from cl_page if we are
1406 * dealing with direct IO, as handled pages are not
1407 * actual page cache pages.
1409 struct osc_async_page *oap = brw_page2oap(pga[0]);
1410 struct cl_page *clpage = oap2cl_page(oap);
1412 inode = clpage->cp_inode;
1416 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1417 RETURN(-ENOMEM); /* Recoverable */
1418 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1419 RETURN(-EINVAL); /* Fatal */
1421 if ((cmd & OBD_BRW_WRITE) != 0) {
1423 req = ptlrpc_request_alloc_pool(cli->cl_import,
1425 &RQF_OST_BRW_WRITE);
1428 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1433 if (opc == OST_WRITE && inode && IS_ENCRYPTED(inode)) {
1434 for (i = 0; i < page_count; i++) {
1435 struct brw_page *pg = pga[i];
1436 struct page *data_page = NULL;
1437 bool retried = false;
1438 bool lockedbymyself;
1439 u32 nunits = (pg->off & ~PAGE_MASK) + pg->count;
1440 struct address_space *map_orig = NULL;
1444 if (nunits & ~LUSTRE_ENCRYPTION_MASK)
1445 nunits = (nunits & LUSTRE_ENCRYPTION_MASK) +
1446 LUSTRE_ENCRYPTION_UNIT_SIZE;
1447 /* The page can already be locked when we arrive here.
1448 * This is possible when cl_page_assume/vvp_page_assume
1449 * is stuck on wait_on_page_writeback with page lock
1450 * held. In this case there is no risk for the lock to
1451 * be released while we are doing our encryption
1452 * processing, because writeback against that page will
1453 * end in vvp_page_completion_write/cl_page_completion,
1454 * which means only once the page is fully processed.
1456 lockedbymyself = trylock_page(pg->pg);
1458 map_orig = pg->pg->mapping;
1459 pg->pg->mapping = inode->i_mapping;
1460 index_orig = pg->pg->index;
1461 pg->pg->index = pg->off >> PAGE_SHIFT;
1464 llcrypt_encrypt_pagecache_blocks(pg->pg,
1468 pg->pg->mapping = map_orig;
1469 pg->pg->index = index_orig;
1472 unlock_page(pg->pg);
1473 if (IS_ERR(data_page)) {
1474 rc = PTR_ERR(data_page);
1475 if (rc == -ENOMEM && !retried) {
1480 ptlrpc_request_free(req);
1483 /* Set PageChecked flag on bounce page for
1484 * disambiguation in osc_release_bounce_pages().
1486 SetPageChecked(data_page);
1488 /* there should be no gap in the middle of page array */
1489 if (i == page_count - 1) {
1490 struct osc_async_page *oap = brw_page2oap(pg);
1492 oa->o_size = oap->oap_count +
1493 oap->oap_obj_off + oap->oap_page_off;
1495 /* len is forced to nunits, and relative offset to 0
1496 * so store the old, clear text info
1498 pg->bp_count_diff = nunits - pg->count;
1500 pg->bp_off_diff = pg->off & ~PAGE_MASK;
1501 pg->off = pg->off & PAGE_MASK;
1503 } else if (opc == OST_READ && inode && IS_ENCRYPTED(inode)) {
1504 for (i = 0; i < page_count; i++) {
1505 struct brw_page *pg = pga[i];
1506 u32 nunits = (pg->off & ~PAGE_MASK) + pg->count;
1508 if (nunits & ~LUSTRE_ENCRYPTION_MASK)
1509 nunits = (nunits & LUSTRE_ENCRYPTION_MASK) +
1510 LUSTRE_ENCRYPTION_UNIT_SIZE;
1511 /* count/off are forced to cover the whole encryption
1512 * unit size so that all encrypted data is stored on the
1513 * OST, so adjust bp_{count,off}_diff for the size of
1516 pg->bp_count_diff = nunits - pg->count;
1518 pg->bp_off_diff = pg->off & ~PAGE_MASK;
1519 pg->off = pg->off & PAGE_MASK;
1523 for (niocount = i = 1; i < page_count; i++) {
1524 if (!can_merge_pages(pga[i - 1], pga[i]))
1528 pill = &req->rq_pill;
1529 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1531 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1532 niocount * sizeof(*niobuf));
1534 for (i = 0; i < page_count; i++) {
1535 short_io_size += pga[i]->count;
1536 if (!inode || !IS_ENCRYPTED(inode)) {
1537 pga[i]->bp_count_diff = 0;
1538 pga[i]->bp_off_diff = 0;
1542 /* Check if read/write is small enough to be a short io. */
1543 if (short_io_size > cli->cl_max_short_io_bytes || niocount > 1 ||
1544 !imp_connect_shortio(cli->cl_import))
1547 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1548 opc == OST_READ ? 0 : short_io_size);
1549 if (opc == OST_READ)
1550 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1553 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1555 ptlrpc_request_free(req);
1558 osc_set_io_portal(req);
1560 ptlrpc_at_set_req_timeout(req);
1561 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1563 req->rq_no_retry_einprogress = 1;
1565 if (short_io_size != 0) {
1567 short_io_buf = NULL;
1571 desc = ptlrpc_prep_bulk_imp(req, page_count,
1572 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1573 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1574 PTLRPC_BULK_PUT_SINK),
1576 &ptlrpc_bulk_kiov_pin_ops);
1579 GOTO(out, rc = -ENOMEM);
1580 /* NB request now owns desc and will free it when it gets freed */
1582 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1583 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1584 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1585 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1587 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1589 /* For READ and WRITE, we can't fill o_uid and o_gid using from_kuid()
1590 * and from_kgid(), because they are asynchronous. Fortunately, variable
1591 * oa contains valid o_uid and o_gid in these two operations.
1592 * Besides, filling o_uid and o_gid is enough for nrs-tbf, see LU-9658.
1593 * OBD_MD_FLUID and OBD_MD_FLUID is not set in order to avoid breaking
1594 * other process logic */
1595 body->oa.o_uid = oa->o_uid;
1596 body->oa.o_gid = oa->o_gid;
1598 obdo_to_ioobj(oa, ioobj);
1599 ioobj->ioo_bufcnt = niocount;
1600 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1601 * that might be send for this request. The actual number is decided
1602 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1603 * "max - 1" for old client compatibility sending "0", and also so the
1604 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1606 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1608 ioobj_max_brw_set(ioobj, 0);
1610 if (short_io_size != 0) {
1611 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1612 body->oa.o_valid |= OBD_MD_FLFLAGS;
1613 body->oa.o_flags = 0;
1615 body->oa.o_flags |= OBD_FL_SHORT_IO;
1616 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1618 if (opc == OST_WRITE) {
1619 short_io_buf = req_capsule_client_get(pill,
1621 LASSERT(short_io_buf != NULL);
1625 LASSERT(page_count > 0);
1627 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1628 struct brw_page *pg = pga[i];
1629 int poff = pg->off & ~PAGE_MASK;
1631 LASSERT(pg->count > 0);
1632 /* make sure there is no gap in the middle of page array */
1633 LASSERTF(page_count == 1 ||
1634 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1635 ergo(i > 0 && i < page_count - 1,
1636 poff == 0 && pg->count == PAGE_SIZE) &&
1637 ergo(i == page_count - 1, poff == 0)),
1638 "i: %d/%d pg: %p off: %llu, count: %u\n",
1639 i, page_count, pg, pg->off, pg->count);
1640 LASSERTF(i == 0 || pg->off > pg_prev->off,
1641 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1642 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1644 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1645 pg_prev->pg, page_private(pg_prev->pg),
1646 pg_prev->pg->index, pg_prev->off);
1647 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1648 (pg->flag & OBD_BRW_SRVLOCK));
1649 if (short_io_size != 0 && opc == OST_WRITE) {
1650 unsigned char *ptr = kmap_atomic(pg->pg);
1652 LASSERT(short_io_size >= requested_nob + pg->count);
1653 memcpy(short_io_buf + requested_nob,
1657 } else if (short_io_size == 0) {
1658 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1661 requested_nob += pg->count;
1663 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1665 niobuf->rnb_len += pg->count;
1667 niobuf->rnb_offset = pg->off;
1668 niobuf->rnb_len = pg->count;
1669 niobuf->rnb_flags = pg->flag;
1674 LASSERTF((void *)(niobuf - niocount) ==
1675 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1676 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1677 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1679 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1681 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1682 body->oa.o_valid |= OBD_MD_FLFLAGS;
1683 body->oa.o_flags = 0;
1685 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1688 if (osc_should_shrink_grant(cli))
1689 osc_shrink_grant_local(cli, &body->oa);
1691 /* size[REQ_REC_OFF] still sizeof (*body) */
1692 if (opc == OST_WRITE) {
1693 if (cli->cl_checksum &&
1694 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1695 /* store cl_cksum_type in a local variable since
1696 * it can be changed via lprocfs */
1697 enum cksum_types cksum_type = cli->cl_cksum_type;
1699 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1700 body->oa.o_flags = 0;
1702 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1704 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1706 rc = osc_checksum_bulk_rw(obd_name, cksum_type,
1707 requested_nob, page_count,
1711 CDEBUG(D_PAGE, "failed to checksum, rc = %d\n",
1715 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1718 /* save this in 'oa', too, for later checking */
1719 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1720 oa->o_flags |= obd_cksum_type_pack(obd_name,
1723 /* clear out the checksum flag, in case this is a
1724 * resend but cl_checksum is no longer set. b=11238 */
1725 oa->o_valid &= ~OBD_MD_FLCKSUM;
1727 oa->o_cksum = body->oa.o_cksum;
1728 /* 1 RC per niobuf */
1729 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1730 sizeof(__u32) * niocount);
1732 if (cli->cl_checksum &&
1733 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1734 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1735 body->oa.o_flags = 0;
1736 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1737 cli->cl_cksum_type);
1738 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1741 /* Client cksum has been already copied to wire obdo in previous
1742 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1743 * resent due to cksum error, this will allow Server to
1744 * check+dump pages on its side */
1746 ptlrpc_request_set_replen(req);
1748 aa = ptlrpc_req_async_args(aa, req);
1750 aa->aa_requested_nob = requested_nob;
1751 aa->aa_nio_count = niocount;
1752 aa->aa_page_count = page_count;
1756 INIT_LIST_HEAD(&aa->aa_oaps);
1759 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1760 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1761 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1762 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1766 ptlrpc_req_finished(req);
1770 char dbgcksum_file_name[PATH_MAX];
1772 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1773 struct brw_page **pga, __u32 server_cksum,
1781 /* will only keep dump of pages on first error for the same range in
1782 * file/fid, not during the resends/retries. */
1783 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1784 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1785 (strncmp(libcfs_debug_file_path_arr, "NONE", 4) != 0 ?
1786 libcfs_debug_file_path_arr :
1787 LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1788 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1789 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1790 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1792 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1793 client_cksum, server_cksum);
1794 filp = filp_open(dbgcksum_file_name,
1795 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1799 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1800 "checksum error: rc = %d\n", dbgcksum_file_name,
1803 CERROR("%s: can't open to dump pages with checksum "
1804 "error: rc = %d\n", dbgcksum_file_name, rc);
1808 for (i = 0; i < page_count; i++) {
1809 len = pga[i]->count;
1810 buf = kmap(pga[i]->pg);
1812 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1814 CERROR("%s: wanted to write %u but got %d "
1815 "error\n", dbgcksum_file_name, len, rc);
1820 CDEBUG(D_INFO, "%s: wrote %d bytes\n",
1821 dbgcksum_file_name, rc);
1826 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1828 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1829 filp_close(filp, NULL);
1833 check_write_checksum(struct obdo *oa, const struct lnet_process_id *peer,
1834 __u32 client_cksum, __u32 server_cksum,
1835 struct osc_brw_async_args *aa)
1837 const char *obd_name = aa->aa_cli->cl_import->imp_obd->obd_name;
1838 enum cksum_types cksum_type;
1839 obd_dif_csum_fn *fn = NULL;
1840 int sector_size = 0;
1845 if (server_cksum == client_cksum) {
1846 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1850 if (aa->aa_cli->cl_checksum_dump)
1851 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1852 server_cksum, client_cksum);
1854 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1857 switch (cksum_type) {
1858 case OBD_CKSUM_T10IP512:
1862 case OBD_CKSUM_T10IP4K:
1866 case OBD_CKSUM_T10CRC512:
1867 fn = obd_dif_crc_fn;
1870 case OBD_CKSUM_T10CRC4K:
1871 fn = obd_dif_crc_fn;
1879 rc = osc_checksum_bulk_t10pi(obd_name, aa->aa_requested_nob,
1880 aa->aa_page_count, aa->aa_ppga,
1881 OST_WRITE, fn, sector_size,
1884 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1885 aa->aa_ppga, OST_WRITE, cksum_type,
1889 msg = "failed to calculate the client write checksum";
1890 else if (cksum_type != obd_cksum_type_unpack(aa->aa_oa->o_flags))
1891 msg = "the server did not use the checksum type specified in "
1892 "the original request - likely a protocol problem";
1893 else if (new_cksum == server_cksum)
1894 msg = "changed on the client after we checksummed it - "
1895 "likely false positive due to mmap IO (bug 11742)";
1896 else if (new_cksum == client_cksum)
1897 msg = "changed in transit before arrival at OST";
1899 msg = "changed in transit AND doesn't match the original - "
1900 "likely false positive due to mmap IO (bug 11742)";
1902 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1903 DFID " object "DOSTID" extent [%llu-%llu], original "
1904 "client csum %x (type %x), server csum %x (type %x),"
1905 " client csum now %x\n",
1906 obd_name, msg, libcfs_nid2str(peer->nid),
1907 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1908 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1909 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1910 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1911 aa->aa_ppga[aa->aa_page_count - 1]->off +
1912 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1914 obd_cksum_type_unpack(aa->aa_oa->o_flags),
1915 server_cksum, cksum_type, new_cksum);
1919 /* Note rc enters this function as number of bytes transferred */
1920 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1922 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1923 struct client_obd *cli = aa->aa_cli;
1924 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1925 const struct lnet_process_id *peer =
1926 &req->rq_import->imp_connection->c_peer;
1927 struct ost_body *body;
1928 u32 client_cksum = 0;
1929 struct inode *inode;
1930 unsigned int blockbits = 0, blocksize = 0;
1934 if (rc < 0 && rc != -EDQUOT) {
1935 DEBUG_REQ(D_INFO, req, "Failed request: rc = %d", rc);
1939 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1940 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1942 DEBUG_REQ(D_INFO, req, "cannot unpack body");
1946 /* set/clear over quota flag for a uid/gid/projid */
1947 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1948 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1949 unsigned qid[LL_MAXQUOTAS] = {
1950 body->oa.o_uid, body->oa.o_gid,
1951 body->oa.o_projid };
1953 "setdq for [%u %u %u] with valid %#llx, flags %x\n",
1954 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
1955 body->oa.o_valid, body->oa.o_flags);
1956 osc_quota_setdq(cli, req->rq_xid, qid, body->oa.o_valid,
1960 osc_update_grant(cli, body);
1965 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1966 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1968 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1970 CERROR("%s: unexpected positive size %d\n",
1975 if (req->rq_bulk != NULL &&
1976 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1979 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1980 check_write_checksum(&body->oa, peer, client_cksum,
1981 body->oa.o_cksum, aa))
1984 rc = check_write_rcs(req, aa->aa_requested_nob,
1985 aa->aa_nio_count, aa->aa_page_count,
1990 /* The rest of this function executes only for OST_READs */
1992 if (req->rq_bulk == NULL) {
1993 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
1995 LASSERT(rc == req->rq_status);
1997 /* if unwrap_bulk failed, return -EAGAIN to retry */
1998 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
2001 GOTO(out, rc = -EAGAIN);
2003 if (rc > aa->aa_requested_nob) {
2004 CERROR("%s: unexpected size %d, requested %d\n", obd_name,
2005 rc, aa->aa_requested_nob);
2009 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
2010 CERROR("%s: unexpected size %d, transferred %d\n", obd_name,
2011 rc, req->rq_bulk->bd_nob_transferred);
2015 if (req->rq_bulk == NULL) {
2017 int nob, pg_count, i = 0;
2020 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
2021 pg_count = aa->aa_page_count;
2022 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
2025 while (nob > 0 && pg_count > 0) {
2027 int count = aa->aa_ppga[i]->count > nob ?
2028 nob : aa->aa_ppga[i]->count;
2030 CDEBUG(D_CACHE, "page %p count %d\n",
2031 aa->aa_ppga[i]->pg, count);
2032 ptr = kmap_atomic(aa->aa_ppga[i]->pg);
2033 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
2035 kunmap_atomic((void *) ptr);
2044 if (rc < aa->aa_requested_nob)
2045 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
2047 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2048 static int cksum_counter;
2049 u32 server_cksum = body->oa.o_cksum;
2052 enum cksum_types cksum_type;
2053 u32 o_flags = body->oa.o_valid & OBD_MD_FLFLAGS ?
2054 body->oa.o_flags : 0;
2056 cksum_type = obd_cksum_type_unpack(o_flags);
2057 rc = osc_checksum_bulk_rw(obd_name, cksum_type, rc,
2058 aa->aa_page_count, aa->aa_ppga,
2059 OST_READ, &client_cksum);
2063 if (req->rq_bulk != NULL &&
2064 peer->nid != req->rq_bulk->bd_sender) {
2066 router = libcfs_nid2str(req->rq_bulk->bd_sender);
2069 if (server_cksum != client_cksum) {
2070 struct ost_body *clbody;
2071 u32 page_count = aa->aa_page_count;
2073 clbody = req_capsule_client_get(&req->rq_pill,
2075 if (cli->cl_checksum_dump)
2076 dump_all_bulk_pages(&clbody->oa, page_count,
2077 aa->aa_ppga, server_cksum,
2080 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
2081 "%s%s%s inode "DFID" object "DOSTID
2082 " extent [%llu-%llu], client %x, "
2083 "server %x, cksum_type %x\n",
2085 libcfs_nid2str(peer->nid),
2087 clbody->oa.o_valid & OBD_MD_FLFID ?
2088 clbody->oa.o_parent_seq : 0ULL,
2089 clbody->oa.o_valid & OBD_MD_FLFID ?
2090 clbody->oa.o_parent_oid : 0,
2091 clbody->oa.o_valid & OBD_MD_FLFID ?
2092 clbody->oa.o_parent_ver : 0,
2093 POSTID(&body->oa.o_oi),
2094 aa->aa_ppga[0]->off,
2095 aa->aa_ppga[page_count-1]->off +
2096 aa->aa_ppga[page_count-1]->count - 1,
2097 client_cksum, server_cksum,
2100 aa->aa_oa->o_cksum = client_cksum;
2104 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
2107 } else if (unlikely(client_cksum)) {
2108 static int cksum_missed;
2111 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
2112 CERROR("%s: checksum %u requested from %s but not sent\n",
2113 obd_name, cksum_missed,
2114 libcfs_nid2str(peer->nid));
2119 inode = page2inode(aa->aa_ppga[0]->pg);
2120 if (inode == NULL) {
2121 /* Try to get reference to inode from cl_page if we are
2122 * dealing with direct IO, as handled pages are not
2123 * actual page cache pages.
2125 struct osc_async_page *oap = brw_page2oap(aa->aa_ppga[0]);
2127 inode = oap2cl_page(oap)->cp_inode;
2129 blockbits = inode->i_blkbits;
2130 blocksize = 1 << blockbits;
2133 if (inode && IS_ENCRYPTED(inode)) {
2136 if (!llcrypt_has_encryption_key(inode)) {
2137 CDEBUG(D_SEC, "no enc key for ino %lu\n", inode->i_ino);
2140 for (idx = 0; idx < aa->aa_page_count; idx++) {
2141 struct brw_page *pg = aa->aa_ppga[idx];
2142 unsigned int offs = 0;
2144 while (offs < PAGE_SIZE) {
2145 /* do not decrypt if page is all 0s */
2146 if (memchr_inv(page_address(pg->pg) + offs, 0,
2147 LUSTRE_ENCRYPTION_UNIT_SIZE) == NULL) {
2148 /* if page is empty forward info to
2149 * upper layers (ll_io_zero_page) by
2150 * clearing PagePrivate2
2153 ClearPagePrivate2(pg->pg);
2158 /* This is direct IO case. Directly call
2159 * decrypt function that takes inode as
2160 * input parameter. Page does not need
2164 ((u64)(pg->off >> PAGE_SHIFT) <<
2165 (PAGE_SHIFT - blockbits)) +
2166 (offs >> blockbits);
2171 LUSTRE_ENCRYPTION_UNIT_SIZE;
2172 i += blocksize, lblk_num++) {
2174 llcrypt_decrypt_block_inplace(
2182 rc = llcrypt_decrypt_pagecache_blocks(
2184 LUSTRE_ENCRYPTION_UNIT_SIZE,
2190 offs += LUSTRE_ENCRYPTION_UNIT_SIZE;
2197 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
2198 aa->aa_oa, &body->oa);
2203 static int osc_brw_redo_request(struct ptlrpc_request *request,
2204 struct osc_brw_async_args *aa, int rc)
2206 struct ptlrpc_request *new_req;
2207 struct osc_brw_async_args *new_aa;
2208 struct osc_async_page *oap;
2211 /* The below message is checked in replay-ost-single.sh test_8ae*/
2212 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
2213 "redo for recoverable error %d", rc);
2215 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
2216 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
2217 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
2218 aa->aa_ppga, &new_req, 1);
2222 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2223 if (oap->oap_request != NULL) {
2224 LASSERTF(request == oap->oap_request,
2225 "request %p != oap_request %p\n",
2226 request, oap->oap_request);
2230 * New request takes over pga and oaps from old request.
2231 * Note that copying a list_head doesn't work, need to move it...
2234 new_req->rq_interpret_reply = request->rq_interpret_reply;
2235 new_req->rq_async_args = request->rq_async_args;
2236 new_req->rq_commit_cb = request->rq_commit_cb;
2237 /* cap resend delay to the current request timeout, this is similar to
2238 * what ptlrpc does (see after_reply()) */
2239 if (aa->aa_resends > new_req->rq_timeout)
2240 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
2242 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
2243 new_req->rq_generation_set = 1;
2244 new_req->rq_import_generation = request->rq_import_generation;
2246 new_aa = ptlrpc_req_async_args(new_aa, new_req);
2248 INIT_LIST_HEAD(&new_aa->aa_oaps);
2249 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
2250 INIT_LIST_HEAD(&new_aa->aa_exts);
2251 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
2252 new_aa->aa_resends = aa->aa_resends;
2254 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
2255 if (oap->oap_request) {
2256 ptlrpc_req_finished(oap->oap_request);
2257 oap->oap_request = ptlrpc_request_addref(new_req);
2261 /* XXX: This code will run into problem if we're going to support
2262 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
2263 * and wait for all of them to be finished. We should inherit request
2264 * set from old request. */
2265 ptlrpcd_add_req(new_req);
2267 DEBUG_REQ(D_INFO, new_req, "new request");
2272 * ugh, we want disk allocation on the target to happen in offset order. we'll
2273 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
2274 * fine for our small page arrays and doesn't require allocation. its an
2275 * insertion sort that swaps elements that are strides apart, shrinking the
2276 * stride down until its '1' and the array is sorted.
2278 static void sort_brw_pages(struct brw_page **array, int num)
2281 struct brw_page *tmp;
2285 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
2290 for (i = stride ; i < num ; i++) {
2293 while (j >= stride && array[j - stride]->off > tmp->off) {
2294 array[j] = array[j - stride];
2299 } while (stride > 1);
2302 static void osc_release_ppga(struct brw_page **ppga, size_t count)
2304 LASSERT(ppga != NULL);
2305 OBD_FREE_PTR_ARRAY(ppga, count);
2308 static int brw_interpret(const struct lu_env *env,
2309 struct ptlrpc_request *req, void *args, int rc)
2311 struct osc_brw_async_args *aa = args;
2312 struct osc_extent *ext;
2313 struct osc_extent *tmp;
2314 struct client_obd *cli = aa->aa_cli;
2315 unsigned long transferred = 0;
2319 rc = osc_brw_fini_request(req, rc);
2320 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2322 /* restore clear text pages */
2323 osc_release_bounce_pages(aa->aa_ppga, aa->aa_page_count);
2326 * When server returns -EINPROGRESS, client should always retry
2327 * regardless of the number of times the bulk was resent already.
2329 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
2330 if (req->rq_import_generation !=
2331 req->rq_import->imp_generation) {
2332 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2333 ""DOSTID", rc = %d.\n",
2334 req->rq_import->imp_obd->obd_name,
2335 POSTID(&aa->aa_oa->o_oi), rc);
2336 } else if (rc == -EINPROGRESS ||
2337 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2338 rc = osc_brw_redo_request(req, aa, rc);
2340 CERROR("%s: too many resent retries for object: "
2341 "%llu:%llu, rc = %d.\n",
2342 req->rq_import->imp_obd->obd_name,
2343 POSTID(&aa->aa_oa->o_oi), rc);
2348 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2353 struct obdo *oa = aa->aa_oa;
2354 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
2355 unsigned long valid = 0;
2356 struct cl_object *obj;
2357 struct osc_async_page *last;
2359 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
2360 obj = osc2cl(last->oap_obj);
2362 cl_object_attr_lock(obj);
2363 if (oa->o_valid & OBD_MD_FLBLOCKS) {
2364 attr->cat_blocks = oa->o_blocks;
2365 valid |= CAT_BLOCKS;
2367 if (oa->o_valid & OBD_MD_FLMTIME) {
2368 attr->cat_mtime = oa->o_mtime;
2371 if (oa->o_valid & OBD_MD_FLATIME) {
2372 attr->cat_atime = oa->o_atime;
2375 if (oa->o_valid & OBD_MD_FLCTIME) {
2376 attr->cat_ctime = oa->o_ctime;
2380 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2381 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
2382 loff_t last_off = last->oap_count + last->oap_obj_off +
2385 /* Change file size if this is an out of quota or
2386 * direct IO write and it extends the file size */
2387 if (loi->loi_lvb.lvb_size < last_off) {
2388 attr->cat_size = last_off;
2391 /* Extend KMS if it's not a lockless write */
2392 if (loi->loi_kms < last_off &&
2393 oap2osc_page(last)->ops_srvlock == 0) {
2394 attr->cat_kms = last_off;
2400 cl_object_attr_update(env, obj, attr, valid);
2401 cl_object_attr_unlock(obj);
2403 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
2406 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
2407 osc_inc_unstable_pages(req);
2409 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
2410 list_del_init(&ext->oe_link);
2411 osc_extent_finish(env, ext, 1,
2412 rc && req->rq_no_delay ? -EAGAIN : rc);
2414 LASSERT(list_empty(&aa->aa_exts));
2415 LASSERT(list_empty(&aa->aa_oaps));
2417 transferred = (req->rq_bulk == NULL ? /* short io */
2418 aa->aa_requested_nob :
2419 req->rq_bulk->bd_nob_transferred);
2421 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2422 ptlrpc_lprocfs_brw(req, transferred);
2424 spin_lock(&cli->cl_loi_list_lock);
2425 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2426 * is called so we know whether to go to sync BRWs or wait for more
2427 * RPCs to complete */
2428 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2429 cli->cl_w_in_flight--;
2431 cli->cl_r_in_flight--;
2432 osc_wake_cache_waiters(cli);
2433 spin_unlock(&cli->cl_loi_list_lock);
2435 osc_io_unplug(env, cli, NULL);
2439 static void brw_commit(struct ptlrpc_request *req)
2441 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
2442 * this called via the rq_commit_cb, I need to ensure
2443 * osc_dec_unstable_pages is still called. Otherwise unstable
2444 * pages may be leaked. */
2445 spin_lock(&req->rq_lock);
2446 if (likely(req->rq_unstable)) {
2447 req->rq_unstable = 0;
2448 spin_unlock(&req->rq_lock);
2450 osc_dec_unstable_pages(req);
2452 req->rq_committed = 1;
2453 spin_unlock(&req->rq_lock);
2458 * Build an RPC by the list of extent @ext_list. The caller must ensure
2459 * that the total pages in this list are NOT over max pages per RPC.
2460 * Extents in the list must be in OES_RPC state.
2462 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
2463 struct list_head *ext_list, int cmd)
2465 struct ptlrpc_request *req = NULL;
2466 struct osc_extent *ext;
2467 struct brw_page **pga = NULL;
2468 struct osc_brw_async_args *aa = NULL;
2469 struct obdo *oa = NULL;
2470 struct osc_async_page *oap;
2471 struct osc_object *obj = NULL;
2472 struct cl_req_attr *crattr = NULL;
2473 loff_t starting_offset = OBD_OBJECT_EOF;
2474 loff_t ending_offset = 0;
2475 /* '1' for consistency with code that checks !mpflag to restore */
2479 bool soft_sync = false;
2480 bool ndelay = false;
2484 __u32 layout_version = 0;
2485 LIST_HEAD(rpc_list);
2486 struct ost_body *body;
2488 LASSERT(!list_empty(ext_list));
2490 /* add pages into rpc_list to build BRW rpc */
2491 list_for_each_entry(ext, ext_list, oe_link) {
2492 LASSERT(ext->oe_state == OES_RPC);
2493 mem_tight |= ext->oe_memalloc;
2494 grant += ext->oe_grants;
2495 page_count += ext->oe_nr_pages;
2496 layout_version = max(layout_version, ext->oe_layout_version);
2501 soft_sync = osc_over_unstable_soft_limit(cli);
2503 mpflag = memalloc_noreclaim_save();
2505 OBD_ALLOC_PTR_ARRAY(pga, page_count);
2507 GOTO(out, rc = -ENOMEM);
2509 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2511 GOTO(out, rc = -ENOMEM);
2514 list_for_each_entry(ext, ext_list, oe_link) {
2515 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
2517 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2519 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
2520 pga[i] = &oap->oap_brw_page;
2521 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2524 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2525 if (starting_offset == OBD_OBJECT_EOF ||
2526 starting_offset > oap->oap_obj_off)
2527 starting_offset = oap->oap_obj_off;
2529 LASSERT(oap->oap_page_off == 0);
2530 if (ending_offset < oap->oap_obj_off + oap->oap_count)
2531 ending_offset = oap->oap_obj_off +
2534 LASSERT(oap->oap_page_off + oap->oap_count ==
2541 /* first page in the list */
2542 oap = list_entry(rpc_list.next, typeof(*oap), oap_rpc_item);
2544 crattr = &osc_env_info(env)->oti_req_attr;
2545 memset(crattr, 0, sizeof(*crattr));
2546 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2547 crattr->cra_flags = ~0ULL;
2548 crattr->cra_page = oap2cl_page(oap);
2549 crattr->cra_oa = oa;
2550 cl_req_attr_set(env, osc2cl(obj), crattr);
2552 if (cmd == OBD_BRW_WRITE) {
2553 oa->o_grant_used = grant;
2554 if (layout_version > 0) {
2555 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2556 PFID(&oa->o_oi.oi_fid), layout_version);
2558 oa->o_layout_version = layout_version;
2559 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2563 sort_brw_pages(pga, page_count);
2564 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2566 CERROR("prep_req failed: %d\n", rc);
2570 req->rq_commit_cb = brw_commit;
2571 req->rq_interpret_reply = brw_interpret;
2572 req->rq_memalloc = mem_tight != 0;
2573 oap->oap_request = ptlrpc_request_addref(req);
2575 req->rq_no_resend = req->rq_no_delay = 1;
2576 /* probably set a shorter timeout value.
2577 * to handle ETIMEDOUT in brw_interpret() correctly. */
2578 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2581 /* Need to update the timestamps after the request is built in case
2582 * we race with setattr (locally or in queue at OST). If OST gets
2583 * later setattr before earlier BRW (as determined by the request xid),
2584 * the OST will not use BRW timestamps. Sadly, there is no obvious
2585 * way to do this in a single call. bug 10150 */
2586 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2587 crattr->cra_oa = &body->oa;
2588 crattr->cra_flags = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2589 cl_req_attr_set(env, osc2cl(obj), crattr);
2590 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2592 aa = ptlrpc_req_async_args(aa, req);
2593 INIT_LIST_HEAD(&aa->aa_oaps);
2594 list_splice_init(&rpc_list, &aa->aa_oaps);
2595 INIT_LIST_HEAD(&aa->aa_exts);
2596 list_splice_init(ext_list, &aa->aa_exts);
2598 spin_lock(&cli->cl_loi_list_lock);
2599 starting_offset >>= PAGE_SHIFT;
2600 if (cmd == OBD_BRW_READ) {
2601 cli->cl_r_in_flight++;
2602 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2603 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2604 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2605 starting_offset + 1);
2607 cli->cl_w_in_flight++;
2608 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2609 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2610 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2611 starting_offset + 1);
2613 spin_unlock(&cli->cl_loi_list_lock);
2615 DEBUG_REQ(D_INODE, req, "%d pages, aa %p, now %ur/%uw in flight",
2616 page_count, aa, cli->cl_r_in_flight,
2617 cli->cl_w_in_flight);
2618 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2620 ptlrpcd_add_req(req);
2626 memalloc_noreclaim_restore(mpflag);
2629 LASSERT(req == NULL);
2632 OBD_SLAB_FREE_PTR(oa, osc_obdo_kmem);
2634 osc_release_bounce_pages(pga, page_count);
2635 osc_release_ppga(pga, page_count);
2637 /* this should happen rarely and is pretty bad, it makes the
2638 * pending list not follow the dirty order */
2639 while (!list_empty(ext_list)) {
2640 ext = list_entry(ext_list->next, struct osc_extent,
2642 list_del_init(&ext->oe_link);
2643 osc_extent_finish(env, ext, 0, rc);
2649 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2653 LASSERT(lock != NULL);
2655 lock_res_and_lock(lock);
2657 if (lock->l_ast_data == NULL)
2658 lock->l_ast_data = data;
2659 if (lock->l_ast_data == data)
2662 unlock_res_and_lock(lock);
2667 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2668 void *cookie, struct lustre_handle *lockh,
2669 enum ldlm_mode mode, __u64 *flags, bool speculative,
2672 bool intent = *flags & LDLM_FL_HAS_INTENT;
2676 /* The request was created before ldlm_cli_enqueue call. */
2677 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2678 struct ldlm_reply *rep;
2680 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2681 LASSERT(rep != NULL);
2683 rep->lock_policy_res1 =
2684 ptlrpc_status_ntoh(rep->lock_policy_res1);
2685 if (rep->lock_policy_res1)
2686 errcode = rep->lock_policy_res1;
2688 *flags |= LDLM_FL_LVB_READY;
2689 } else if (errcode == ELDLM_OK) {
2690 *flags |= LDLM_FL_LVB_READY;
2693 /* Call the update callback. */
2694 rc = (*upcall)(cookie, lockh, errcode);
2696 /* release the reference taken in ldlm_cli_enqueue() */
2697 if (errcode == ELDLM_LOCK_MATCHED)
2699 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2700 ldlm_lock_decref(lockh, mode);
2705 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2708 struct osc_enqueue_args *aa = args;
2709 struct ldlm_lock *lock;
2710 struct lustre_handle *lockh = &aa->oa_lockh;
2711 enum ldlm_mode mode = aa->oa_mode;
2712 struct ost_lvb *lvb = aa->oa_lvb;
2713 __u32 lvb_len = sizeof(*lvb);
2715 struct ldlm_enqueue_info einfo = {
2716 .ei_type = aa->oa_type,
2722 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2724 lock = ldlm_handle2lock(lockh);
2725 LASSERTF(lock != NULL,
2726 "lockh %#llx, req %p, aa %p - client evicted?\n",
2727 lockh->cookie, req, aa);
2729 /* Take an additional reference so that a blocking AST that
2730 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2731 * to arrive after an upcall has been executed by
2732 * osc_enqueue_fini(). */
2733 ldlm_lock_addref(lockh, mode);
2735 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2736 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2738 /* Let CP AST to grant the lock first. */
2739 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2741 if (aa->oa_speculative) {
2742 LASSERT(aa->oa_lvb == NULL);
2743 LASSERT(aa->oa_flags == NULL);
2744 aa->oa_flags = &flags;
2747 /* Complete obtaining the lock procedure. */
2748 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, &einfo, 1, aa->oa_flags,
2749 lvb, lvb_len, lockh, rc);
2750 /* Complete osc stuff. */
2751 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2752 aa->oa_flags, aa->oa_speculative, rc);
2754 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2756 ldlm_lock_decref(lockh, mode);
2757 LDLM_LOCK_PUT(lock);
2761 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2762 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2763 * other synchronous requests, however keeping some locks and trying to obtain
2764 * others may take a considerable amount of time in a case of ost failure; and
2765 * when other sync requests do not get released lock from a client, the client
2766 * is evicted from the cluster -- such scenarious make the life difficult, so
2767 * release locks just after they are obtained. */
2768 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2769 __u64 *flags, union ldlm_policy_data *policy,
2770 struct ost_lvb *lvb, osc_enqueue_upcall_f upcall,
2771 void *cookie, struct ldlm_enqueue_info *einfo,
2772 struct ptlrpc_request_set *rqset, int async,
2775 struct obd_device *obd = exp->exp_obd;
2776 struct lustre_handle lockh = { 0 };
2777 struct ptlrpc_request *req = NULL;
2778 int intent = *flags & LDLM_FL_HAS_INTENT;
2779 __u64 match_flags = *flags;
2780 enum ldlm_mode mode;
2784 /* Filesystem lock extents are extended to page boundaries so that
2785 * dealing with the page cache is a little smoother. */
2786 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2787 policy->l_extent.end |= ~PAGE_MASK;
2789 /* Next, search for already existing extent locks that will cover us */
2790 /* If we're trying to read, we also search for an existing PW lock. The
2791 * VFS and page cache already protect us locally, so lots of readers/
2792 * writers can share a single PW lock.
2794 * There are problems with conversion deadlocks, so instead of
2795 * converting a read lock to a write lock, we'll just enqueue a new
2798 * At some point we should cancel the read lock instead of making them
2799 * send us a blocking callback, but there are problems with canceling
2800 * locks out from other users right now, too. */
2801 mode = einfo->ei_mode;
2802 if (einfo->ei_mode == LCK_PR)
2804 /* Normal lock requests must wait for the LVB to be ready before
2805 * matching a lock; speculative lock requests do not need to,
2806 * because they will not actually use the lock. */
2808 match_flags |= LDLM_FL_LVB_READY;
2810 match_flags |= LDLM_FL_BLOCK_GRANTED;
2811 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2812 einfo->ei_type, policy, mode, &lockh);
2814 struct ldlm_lock *matched;
2816 if (*flags & LDLM_FL_TEST_LOCK)
2819 matched = ldlm_handle2lock(&lockh);
2821 /* This DLM lock request is speculative, and does not
2822 * have an associated IO request. Therefore if there
2823 * is already a DLM lock, it wll just inform the
2824 * caller to cancel the request for this stripe.*/
2825 lock_res_and_lock(matched);
2826 if (ldlm_extent_equal(&policy->l_extent,
2827 &matched->l_policy_data.l_extent))
2831 unlock_res_and_lock(matched);
2833 ldlm_lock_decref(&lockh, mode);
2834 LDLM_LOCK_PUT(matched);
2836 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2837 *flags |= LDLM_FL_LVB_READY;
2839 /* We already have a lock, and it's referenced. */
2840 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2842 ldlm_lock_decref(&lockh, mode);
2843 LDLM_LOCK_PUT(matched);
2846 ldlm_lock_decref(&lockh, mode);
2847 LDLM_LOCK_PUT(matched);
2851 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2854 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2855 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2857 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2858 sizeof(*lvb), LVB_T_OST, &lockh, async);
2861 struct osc_enqueue_args *aa;
2862 aa = ptlrpc_req_async_args(aa, req);
2864 aa->oa_mode = einfo->ei_mode;
2865 aa->oa_type = einfo->ei_type;
2866 lustre_handle_copy(&aa->oa_lockh, &lockh);
2867 aa->oa_upcall = upcall;
2868 aa->oa_cookie = cookie;
2869 aa->oa_speculative = speculative;
2871 aa->oa_flags = flags;
2874 /* speculative locks are essentially to enqueue
2875 * a DLM lock in advance, so we don't care
2876 * about the result of the enqueue. */
2878 aa->oa_flags = NULL;
2881 req->rq_interpret_reply = osc_enqueue_interpret;
2882 ptlrpc_set_add_req(rqset, req);
2887 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2888 flags, speculative, rc);
2893 int osc_match_base(const struct lu_env *env, struct obd_export *exp,
2894 struct ldlm_res_id *res_id, enum ldlm_type type,
2895 union ldlm_policy_data *policy, enum ldlm_mode mode,
2896 __u64 *flags, struct osc_object *obj,
2897 struct lustre_handle *lockh, enum ldlm_match_flags match_flags)
2899 struct obd_device *obd = exp->exp_obd;
2900 __u64 lflags = *flags;
2904 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2907 /* Filesystem lock extents are extended to page boundaries so that
2908 * dealing with the page cache is a little smoother */
2909 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2910 policy->l_extent.end |= ~PAGE_MASK;
2912 /* Next, search for already existing extent locks that will cover us */
2913 rc = ldlm_lock_match_with_skip(obd->obd_namespace, lflags, 0,
2914 res_id, type, policy, mode, lockh,
2916 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
2920 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2922 LASSERT(lock != NULL);
2923 if (osc_set_lock_data(lock, obj)) {
2924 lock_res_and_lock(lock);
2925 if (!ldlm_is_lvb_cached(lock)) {
2926 LASSERT(lock->l_ast_data == obj);
2927 osc_lock_lvb_update(env, obj, lock, NULL);
2928 ldlm_set_lvb_cached(lock);
2930 unlock_res_and_lock(lock);
2932 ldlm_lock_decref(lockh, rc);
2935 LDLM_LOCK_PUT(lock);
2940 static int osc_statfs_interpret(const struct lu_env *env,
2941 struct ptlrpc_request *req, void *args, int rc)
2943 struct osc_async_args *aa = args;
2944 struct obd_statfs *msfs;
2949 * The request has in fact never been sent due to issues at
2950 * a higher level (LOV). Exit immediately since the caller
2951 * is aware of the problem and takes care of the clean up.
2955 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2956 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2962 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2964 GOTO(out, rc = -EPROTO);
2966 *aa->aa_oi->oi_osfs = *msfs;
2968 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2973 static int osc_statfs_async(struct obd_export *exp,
2974 struct obd_info *oinfo, time64_t max_age,
2975 struct ptlrpc_request_set *rqset)
2977 struct obd_device *obd = class_exp2obd(exp);
2978 struct ptlrpc_request *req;
2979 struct osc_async_args *aa;
2983 if (obd->obd_osfs_age >= max_age) {
2985 "%s: use %p cache blocks %llu/%llu objects %llu/%llu\n",
2986 obd->obd_name, &obd->obd_osfs,
2987 obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
2988 obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
2989 spin_lock(&obd->obd_osfs_lock);
2990 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
2991 spin_unlock(&obd->obd_osfs_lock);
2992 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
2993 if (oinfo->oi_cb_up)
2994 oinfo->oi_cb_up(oinfo, 0);
2999 /* We could possibly pass max_age in the request (as an absolute
3000 * timestamp or a "seconds.usec ago") so the target can avoid doing
3001 * extra calls into the filesystem if that isn't necessary (e.g.
3002 * during mount that would help a bit). Having relative timestamps
3003 * is not so great if request processing is slow, while absolute
3004 * timestamps are not ideal because they need time synchronization. */
3005 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3009 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3011 ptlrpc_request_free(req);
3014 ptlrpc_request_set_replen(req);
3015 req->rq_request_portal = OST_CREATE_PORTAL;
3016 ptlrpc_at_set_req_timeout(req);
3018 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3019 /* procfs requests not want stat in wait for avoid deadlock */
3020 req->rq_no_resend = 1;
3021 req->rq_no_delay = 1;
3024 req->rq_interpret_reply = osc_statfs_interpret;
3025 aa = ptlrpc_req_async_args(aa, req);
3028 ptlrpc_set_add_req(rqset, req);
3032 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
3033 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
3035 struct obd_device *obd = class_exp2obd(exp);
3036 struct obd_statfs *msfs;
3037 struct ptlrpc_request *req;
3038 struct obd_import *imp = NULL;
3043 /*Since the request might also come from lprocfs, so we need
3044 *sync this with client_disconnect_export Bug15684*/
3045 down_read(&obd->u.cli.cl_sem);
3046 if (obd->u.cli.cl_import)
3047 imp = class_import_get(obd->u.cli.cl_import);
3048 up_read(&obd->u.cli.cl_sem);
3052 /* We could possibly pass max_age in the request (as an absolute
3053 * timestamp or a "seconds.usec ago") so the target can avoid doing
3054 * extra calls into the filesystem if that isn't necessary (e.g.
3055 * during mount that would help a bit). Having relative timestamps
3056 * is not so great if request processing is slow, while absolute
3057 * timestamps are not ideal because they need time synchronization. */
3058 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3060 class_import_put(imp);
3065 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3067 ptlrpc_request_free(req);
3070 ptlrpc_request_set_replen(req);
3071 req->rq_request_portal = OST_CREATE_PORTAL;
3072 ptlrpc_at_set_req_timeout(req);
3074 if (flags & OBD_STATFS_NODELAY) {
3075 /* procfs requests not want stat in wait for avoid deadlock */
3076 req->rq_no_resend = 1;
3077 req->rq_no_delay = 1;
3080 rc = ptlrpc_queue_wait(req);
3084 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3086 GOTO(out, rc = -EPROTO);
3092 ptlrpc_req_finished(req);
3096 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3097 void *karg, void __user *uarg)
3099 struct obd_device *obd = exp->exp_obd;
3100 struct obd_ioctl_data *data = karg;
3104 if (!try_module_get(THIS_MODULE)) {
3105 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
3106 module_name(THIS_MODULE));
3110 case OBD_IOC_CLIENT_RECOVER:
3111 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
3112 data->ioc_inlbuf1, 0);
3116 case IOC_OSC_SET_ACTIVE:
3117 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
3122 CDEBUG(D_INODE, "%s: unrecognised ioctl %#x by %s: rc = %d\n",
3123 obd->obd_name, cmd, current->comm, rc);
3127 module_put(THIS_MODULE);
3131 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
3132 u32 keylen, void *key, u32 vallen, void *val,
3133 struct ptlrpc_request_set *set)
3135 struct ptlrpc_request *req;
3136 struct obd_device *obd = exp->exp_obd;
3137 struct obd_import *imp = class_exp2cliimp(exp);
3142 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3144 if (KEY_IS(KEY_CHECKSUM)) {
3145 if (vallen != sizeof(int))
3147 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3151 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3152 sptlrpc_conf_client_adapt(obd);
3156 if (KEY_IS(KEY_FLUSH_CTX)) {
3157 sptlrpc_import_flush_my_ctx(imp);
3161 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
3162 struct client_obd *cli = &obd->u.cli;
3163 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
3164 long target = *(long *)val;
3166 nr = osc_lru_shrink(env, cli, min(nr, target), true);
3171 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3174 /* We pass all other commands directly to OST. Since nobody calls osc
3175 methods directly and everybody is supposed to go through LOV, we
3176 assume lov checked invalid values for us.
3177 The only recognised values so far are evict_by_nid and mds_conn.
3178 Even if something bad goes through, we'd get a -EINVAL from OST
3181 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
3182 &RQF_OST_SET_GRANT_INFO :
3187 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3188 RCL_CLIENT, keylen);
3189 if (!KEY_IS(KEY_GRANT_SHRINK))
3190 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3191 RCL_CLIENT, vallen);
3192 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3194 ptlrpc_request_free(req);
3198 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3199 memcpy(tmp, key, keylen);
3200 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
3203 memcpy(tmp, val, vallen);
3205 if (KEY_IS(KEY_GRANT_SHRINK)) {
3206 struct osc_grant_args *aa;
3209 aa = ptlrpc_req_async_args(aa, req);
3210 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
3212 ptlrpc_req_finished(req);
3215 *oa = ((struct ost_body *)val)->oa;
3217 req->rq_interpret_reply = osc_shrink_grant_interpret;
3220 ptlrpc_request_set_replen(req);
3221 if (!KEY_IS(KEY_GRANT_SHRINK)) {
3222 LASSERT(set != NULL);
3223 ptlrpc_set_add_req(set, req);
3224 ptlrpc_check_set(NULL, set);
3226 ptlrpcd_add_req(req);
3231 EXPORT_SYMBOL(osc_set_info_async);
3233 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
3234 struct obd_device *obd, struct obd_uuid *cluuid,
3235 struct obd_connect_data *data, void *localdata)
3237 struct client_obd *cli = &obd->u.cli;
3239 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3243 spin_lock(&cli->cl_loi_list_lock);
3244 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
3245 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM) {
3246 /* restore ocd_grant_blkbits as client page bits */
3247 data->ocd_grant_blkbits = PAGE_SHIFT;
3248 grant += cli->cl_dirty_grant;
3250 grant += cli->cl_dirty_pages << PAGE_SHIFT;
3252 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
3253 lost_grant = cli->cl_lost_grant;
3254 cli->cl_lost_grant = 0;
3255 spin_unlock(&cli->cl_loi_list_lock);
3257 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
3258 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
3259 data->ocd_version, data->ocd_grant, lost_grant);
3264 EXPORT_SYMBOL(osc_reconnect);
3266 int osc_disconnect(struct obd_export *exp)
3268 struct obd_device *obd = class_exp2obd(exp);
3271 rc = client_disconnect_export(exp);
3273 * Initially we put del_shrink_grant before disconnect_export, but it
3274 * causes the following problem if setup (connect) and cleanup
3275 * (disconnect) are tangled together.
3276 * connect p1 disconnect p2
3277 * ptlrpc_connect_import
3278 * ............... class_manual_cleanup
3281 * ptlrpc_connect_interrupt
3283 * add this client to shrink list
3285 * Bang! grant shrink thread trigger the shrink. BUG18662
3287 osc_del_grant_list(&obd->u.cli);
3290 EXPORT_SYMBOL(osc_disconnect);
3292 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
3293 struct hlist_node *hnode, void *arg)
3295 struct lu_env *env = arg;
3296 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
3297 struct ldlm_lock *lock;
3298 struct osc_object *osc = NULL;
3302 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
3303 if (lock->l_ast_data != NULL && osc == NULL) {
3304 osc = lock->l_ast_data;
3305 cl_object_get(osc2cl(osc));
3308 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
3309 * by the 2nd round of ldlm_namespace_clean() call in
3310 * osc_import_event(). */
3311 ldlm_clear_cleaned(lock);
3316 osc_object_invalidate(env, osc);
3317 cl_object_put(env, osc2cl(osc));
3322 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
3324 static int osc_import_event(struct obd_device *obd,
3325 struct obd_import *imp,
3326 enum obd_import_event event)
3328 struct client_obd *cli;
3332 LASSERT(imp->imp_obd == obd);
3335 case IMP_EVENT_DISCON: {
3337 spin_lock(&cli->cl_loi_list_lock);
3338 cli->cl_avail_grant = 0;
3339 cli->cl_lost_grant = 0;
3340 spin_unlock(&cli->cl_loi_list_lock);
3343 case IMP_EVENT_INACTIVE: {
3344 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
3347 case IMP_EVENT_INVALIDATE: {
3348 struct ldlm_namespace *ns = obd->obd_namespace;
3352 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3354 env = cl_env_get(&refcheck);
3356 osc_io_unplug(env, &obd->u.cli, NULL);
3358 cfs_hash_for_each_nolock(ns->ns_rs_hash,
3359 osc_ldlm_resource_invalidate,
3361 cl_env_put(env, &refcheck);
3363 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3368 case IMP_EVENT_ACTIVE: {
3369 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
3372 case IMP_EVENT_OCD: {
3373 struct obd_connect_data *ocd = &imp->imp_connect_data;
3375 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3376 osc_init_grant(&obd->u.cli, ocd);
3379 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3380 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3382 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
3385 case IMP_EVENT_DEACTIVATE: {
3386 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
3389 case IMP_EVENT_ACTIVATE: {
3390 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
3394 CERROR("Unknown import event %d\n", event);
3401 * Determine whether the lock can be canceled before replaying the lock
3402 * during recovery, see bug16774 for detailed information.
3404 * \retval zero the lock can't be canceled
3405 * \retval other ok to cancel
3407 static int osc_cancel_weight(struct ldlm_lock *lock)
3410 * Cancel all unused and granted extent lock.
3412 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3413 ldlm_is_granted(lock) &&
3414 osc_ldlm_weigh_ast(lock) == 0)
3420 static int brw_queue_work(const struct lu_env *env, void *data)
3422 struct client_obd *cli = data;
3424 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3426 osc_io_unplug(env, cli, NULL);
3430 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
3432 struct client_obd *cli = &obd->u.cli;
3438 rc = ptlrpcd_addref();
3442 rc = client_obd_setup(obd, lcfg);
3444 GOTO(out_ptlrpcd, rc);
3447 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3448 if (IS_ERR(handler))
3449 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3450 cli->cl_writeback_work = handler;
3452 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3453 if (IS_ERR(handler))
3454 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3455 cli->cl_lru_work = handler;
3457 rc = osc_quota_setup(obd);
3459 GOTO(out_ptlrpcd_work, rc);
3461 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3462 osc_update_next_shrink(cli);
3467 if (cli->cl_writeback_work != NULL) {
3468 ptlrpcd_destroy_work(cli->cl_writeback_work);
3469 cli->cl_writeback_work = NULL;
3471 if (cli->cl_lru_work != NULL) {
3472 ptlrpcd_destroy_work(cli->cl_lru_work);
3473 cli->cl_lru_work = NULL;
3475 client_obd_cleanup(obd);
3480 EXPORT_SYMBOL(osc_setup_common);
3482 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3484 struct client_obd *cli = &obd->u.cli;
3492 rc = osc_setup_common(obd, lcfg);
3496 rc = osc_tunables_init(obd);
3501 * We try to control the total number of requests with a upper limit
3502 * osc_reqpool_maxreqcount. There might be some race which will cause
3503 * over-limit allocation, but it is fine.
3505 req_count = atomic_read(&osc_pool_req_count);
3506 if (req_count < osc_reqpool_maxreqcount) {
3507 adding = cli->cl_max_rpcs_in_flight + 2;
3508 if (req_count + adding > osc_reqpool_maxreqcount)
3509 adding = osc_reqpool_maxreqcount - req_count;
3511 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3512 atomic_add(added, &osc_pool_req_count);
3515 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3517 spin_lock(&osc_shrink_lock);
3518 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3519 spin_unlock(&osc_shrink_lock);
3520 cli->cl_import->imp_idle_timeout = osc_idle_timeout;
3521 cli->cl_import->imp_idle_debug = D_HA;
3526 int osc_precleanup_common(struct obd_device *obd)
3528 struct client_obd *cli = &obd->u.cli;
3532 * for echo client, export may be on zombie list, wait for
3533 * zombie thread to cull it, because cli.cl_import will be
3534 * cleared in client_disconnect_export():
3535 * class_export_destroy() -> obd_cleanup() ->
3536 * echo_device_free() -> echo_client_cleanup() ->
3537 * obd_disconnect() -> osc_disconnect() ->
3538 * client_disconnect_export()
3540 obd_zombie_barrier();
3541 if (cli->cl_writeback_work) {
3542 ptlrpcd_destroy_work(cli->cl_writeback_work);
3543 cli->cl_writeback_work = NULL;
3546 if (cli->cl_lru_work) {
3547 ptlrpcd_destroy_work(cli->cl_lru_work);
3548 cli->cl_lru_work = NULL;
3551 obd_cleanup_client_import(obd);
3554 EXPORT_SYMBOL(osc_precleanup_common);
3556 static int osc_precleanup(struct obd_device *obd)
3560 osc_precleanup_common(obd);
3562 ptlrpc_lprocfs_unregister_obd(obd);
3566 int osc_cleanup_common(struct obd_device *obd)
3568 struct client_obd *cli = &obd->u.cli;
3573 spin_lock(&osc_shrink_lock);
3574 list_del(&cli->cl_shrink_list);
3575 spin_unlock(&osc_shrink_lock);
3578 if (cli->cl_cache != NULL) {
3579 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3580 spin_lock(&cli->cl_cache->ccc_lru_lock);
3581 list_del_init(&cli->cl_lru_osc);
3582 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3583 cli->cl_lru_left = NULL;
3584 cl_cache_decref(cli->cl_cache);
3585 cli->cl_cache = NULL;
3588 /* free memory of osc quota cache */
3589 osc_quota_cleanup(obd);
3591 rc = client_obd_cleanup(obd);
3596 EXPORT_SYMBOL(osc_cleanup_common);
3598 static const struct obd_ops osc_obd_ops = {
3599 .o_owner = THIS_MODULE,
3600 .o_setup = osc_setup,
3601 .o_precleanup = osc_precleanup,
3602 .o_cleanup = osc_cleanup_common,
3603 .o_add_conn = client_import_add_conn,
3604 .o_del_conn = client_import_del_conn,
3605 .o_connect = client_connect_import,
3606 .o_reconnect = osc_reconnect,
3607 .o_disconnect = osc_disconnect,
3608 .o_statfs = osc_statfs,
3609 .o_statfs_async = osc_statfs_async,
3610 .o_create = osc_create,
3611 .o_destroy = osc_destroy,
3612 .o_getattr = osc_getattr,
3613 .o_setattr = osc_setattr,
3614 .o_iocontrol = osc_iocontrol,
3615 .o_set_info_async = osc_set_info_async,
3616 .o_import_event = osc_import_event,
3617 .o_quotactl = osc_quotactl,
3620 static struct shrinker *osc_cache_shrinker;
3621 LIST_HEAD(osc_shrink_list);
3622 DEFINE_SPINLOCK(osc_shrink_lock);
3624 #ifndef HAVE_SHRINKER_COUNT
3625 static int osc_cache_shrink(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask))
3627 struct shrink_control scv = {
3628 .nr_to_scan = shrink_param(sc, nr_to_scan),
3629 .gfp_mask = shrink_param(sc, gfp_mask)
3631 (void)osc_cache_shrink_scan(shrinker, &scv);
3633 return osc_cache_shrink_count(shrinker, &scv);
3637 static int __init osc_init(void)
3639 unsigned int reqpool_size;
3640 unsigned int reqsize;
3642 DEF_SHRINKER_VAR(osc_shvar, osc_cache_shrink,
3643 osc_cache_shrink_count, osc_cache_shrink_scan);
3646 /* print an address of _any_ initialized kernel symbol from this
3647 * module, to allow debugging with gdb that doesn't support data
3648 * symbols from modules.*/
3649 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3651 rc = lu_kmem_init(osc_caches);
3655 rc = class_register_type(&osc_obd_ops, NULL, true,
3656 LUSTRE_OSC_NAME, &osc_device_type);
3660 osc_cache_shrinker = set_shrinker(DEFAULT_SEEKS, &osc_shvar);
3662 /* This is obviously too much memory, only prevent overflow here */
3663 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3664 GOTO(out_type, rc = -EINVAL);
3666 reqpool_size = osc_reqpool_mem_max << 20;
3669 while (reqsize < OST_IO_MAXREQSIZE)
3670 reqsize = reqsize << 1;
3673 * We don't enlarge the request count in OSC pool according to
3674 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3675 * tried after normal allocation failed. So a small OSC pool won't
3676 * cause much performance degression in most of cases.
3678 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3680 atomic_set(&osc_pool_req_count, 0);
3681 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3682 ptlrpc_add_rqs_to_pool);
3684 if (osc_rq_pool == NULL)
3685 GOTO(out_type, rc = -ENOMEM);
3687 rc = osc_start_grant_work();
3689 GOTO(out_req_pool, rc);
3694 ptlrpc_free_rq_pool(osc_rq_pool);
3696 class_unregister_type(LUSTRE_OSC_NAME);
3698 lu_kmem_fini(osc_caches);
3703 static void __exit osc_exit(void)
3705 osc_stop_grant_work();
3706 remove_shrinker(osc_cache_shrinker);
3707 class_unregister_type(LUSTRE_OSC_NAME);
3708 lu_kmem_fini(osc_caches);
3709 ptlrpc_free_rq_pool(osc_rq_pool);
3712 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3713 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3714 MODULE_VERSION(LUSTRE_VERSION_STRING);
3715 MODULE_LICENSE("GPL");
3717 module_init(osc_init);
3718 module_exit(osc_exit);