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/
32 #define DEBUG_SUBSYSTEM S_OSC
34 #include <linux/workqueue.h>
35 #include <libcfs/libcfs.h>
36 #include <linux/falloc.h>
37 #include <lprocfs_status.h>
38 #include <lustre_dlm.h>
39 #include <lustre_fid.h>
40 #include <lustre_ha.h>
41 #include <uapi/linux/lustre/lustre_ioctl.h>
42 #include <lustre_net.h>
43 #include <lustre_obdo.h>
45 #include <obd_cksum.h>
46 #include <obd_class.h>
47 #include <lustre_osc.h>
48 #include <linux/falloc.h>
50 #include "osc_internal.h"
51 #include <lnet/lnet_rdma.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);
452 oa->o_falloc_mode = mode;
453 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
458 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_FALLOCATE);
460 ptlrpc_request_free(req);
464 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
467 lustre_set_wire_obdo(&imp->imp_connect_data, &body->oa, oa);
469 ptlrpc_request_set_replen(req);
471 req->rq_interpret_reply = osc_setattr_interpret;
472 BUILD_BUG_ON(sizeof(*sa) > sizeof(req->rq_async_args));
473 sa = ptlrpc_req_async_args(sa, req);
475 sa->sa_upcall = upcall;
476 sa->sa_cookie = cookie;
478 ptlrpcd_add_req(req);
482 EXPORT_SYMBOL(osc_fallocate_base);
484 static int osc_sync_interpret(const struct lu_env *env,
485 struct ptlrpc_request *req, void *args, int rc)
487 struct osc_fsync_args *fa = args;
488 struct ost_body *body;
489 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
490 unsigned long valid = 0;
491 struct cl_object *obj;
497 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
499 CERROR("can't unpack ost_body\n");
500 GOTO(out, rc = -EPROTO);
503 *fa->fa_oa = body->oa;
504 obj = osc2cl(fa->fa_obj);
506 /* Update osc object's blocks attribute */
507 cl_object_attr_lock(obj);
508 if (body->oa.o_valid & OBD_MD_FLBLOCKS) {
509 attr->cat_blocks = body->oa.o_blocks;
514 cl_object_attr_update(env, obj, attr, valid);
515 cl_object_attr_unlock(obj);
518 rc = fa->fa_upcall(fa->fa_cookie, rc);
522 int osc_sync_base(struct osc_object *obj, struct obdo *oa,
523 obd_enqueue_update_f upcall, void *cookie,
524 struct ptlrpc_request_set *rqset)
526 struct obd_export *exp = osc_export(obj);
527 struct ptlrpc_request *req;
528 struct ost_body *body;
529 struct osc_fsync_args *fa;
533 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
537 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
539 ptlrpc_request_free(req);
543 /* overload the size and blocks fields in the oa with start/end */
544 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
546 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
548 ptlrpc_request_set_replen(req);
549 req->rq_interpret_reply = osc_sync_interpret;
551 fa = ptlrpc_req_async_args(fa, req);
554 fa->fa_upcall = upcall;
555 fa->fa_cookie = cookie;
557 ptlrpc_set_add_req(rqset, req);
562 /* Find and cancel locally locks matched by @mode in the resource found by
563 * @objid. Found locks are added into @cancel list. Returns the amount of
564 * locks added to @cancels list. */
565 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
566 struct list_head *cancels,
567 enum ldlm_mode mode, __u64 lock_flags)
569 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
570 struct ldlm_res_id res_id;
571 struct ldlm_resource *res;
575 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
576 * export) but disabled through procfs (flag in NS).
578 * This distinguishes from a case when ELC is not supported originally,
579 * when we still want to cancel locks in advance and just cancel them
580 * locally, without sending any RPC. */
581 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
584 ostid_build_res_name(&oa->o_oi, &res_id);
585 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
589 LDLM_RESOURCE_ADDREF(res);
590 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
591 lock_flags, 0, NULL);
592 LDLM_RESOURCE_DELREF(res);
593 ldlm_resource_putref(res);
597 static int osc_destroy_interpret(const struct lu_env *env,
598 struct ptlrpc_request *req, void *args, int rc)
600 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
602 atomic_dec(&cli->cl_destroy_in_flight);
603 wake_up(&cli->cl_destroy_waitq);
608 static int osc_can_send_destroy(struct client_obd *cli)
610 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
611 cli->cl_max_rpcs_in_flight) {
612 /* The destroy request can be sent */
615 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
616 cli->cl_max_rpcs_in_flight) {
618 * The counter has been modified between the two atomic
621 wake_up(&cli->cl_destroy_waitq);
626 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
629 struct client_obd *cli = &exp->exp_obd->u.cli;
630 struct ptlrpc_request *req;
631 struct ost_body *body;
637 CDEBUG(D_INFO, "oa NULL\n");
641 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
642 LDLM_FL_DISCARD_DATA);
644 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
646 ldlm_lock_list_put(&cancels, l_bl_ast, count);
650 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
653 ptlrpc_request_free(req);
657 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
658 ptlrpc_at_set_req_timeout(req);
660 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
662 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
664 ptlrpc_request_set_replen(req);
666 req->rq_interpret_reply = osc_destroy_interpret;
667 if (!osc_can_send_destroy(cli)) {
669 * Wait until the number of on-going destroy RPCs drops
670 * under max_rpc_in_flight
672 rc = l_wait_event_abortable_exclusive(
673 cli->cl_destroy_waitq,
674 osc_can_send_destroy(cli));
676 ptlrpc_req_finished(req);
681 /* Do not wait for response */
682 ptlrpcd_add_req(req);
686 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
689 u64 bits = OBD_MD_FLBLOCKS | OBD_MD_FLGRANT;
691 LASSERT(!(oa->o_valid & bits));
694 spin_lock(&cli->cl_loi_list_lock);
695 if (cli->cl_ocd_grant_param)
696 oa->o_dirty = cli->cl_dirty_grant;
698 oa->o_dirty = cli->cl_dirty_pages << PAGE_SHIFT;
699 if (unlikely(cli->cl_dirty_pages > cli->cl_dirty_max_pages)) {
700 CERROR("dirty %lu > dirty_max %lu\n",
702 cli->cl_dirty_max_pages);
704 } else if (unlikely(atomic_long_read(&obd_dirty_pages) >
705 (long)(obd_max_dirty_pages + 1))) {
706 /* The atomic_read() allowing the atomic_inc() are
707 * not covered by a lock thus they may safely race and trip
708 * this CERROR() unless we add in a small fudge factor (+1). */
709 CERROR("%s: dirty %ld > system dirty_max %ld\n",
710 cli_name(cli), atomic_long_read(&obd_dirty_pages),
711 obd_max_dirty_pages);
713 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
715 CERROR("dirty %lu - dirty_max %lu too big???\n",
716 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
719 unsigned long nrpages;
720 unsigned long undirty;
722 nrpages = cli->cl_max_pages_per_rpc;
723 nrpages *= cli->cl_max_rpcs_in_flight + 1;
724 nrpages = max(nrpages, cli->cl_dirty_max_pages);
725 undirty = nrpages << PAGE_SHIFT;
726 if (cli->cl_ocd_grant_param) {
729 /* take extent tax into account when asking for more
731 nrextents = (nrpages + cli->cl_max_extent_pages - 1) /
732 cli->cl_max_extent_pages;
733 undirty += nrextents * cli->cl_grant_extent_tax;
735 /* Do not ask for more than OBD_MAX_GRANT - a margin for server
736 * to add extent tax, etc.
738 oa->o_undirty = min(undirty, OBD_MAX_GRANT &
739 ~(PTLRPC_MAX_BRW_SIZE * 4UL));
741 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
742 /* o_dropped AKA o_misc is 32 bits, but cl_lost_grant is 64 bits */
743 if (cli->cl_lost_grant > INT_MAX) {
745 "%s: avoided o_dropped overflow: cl_lost_grant %lu\n",
746 cli_name(cli), cli->cl_lost_grant);
747 oa->o_dropped = INT_MAX;
749 oa->o_dropped = cli->cl_lost_grant;
751 cli->cl_lost_grant -= oa->o_dropped;
752 spin_unlock(&cli->cl_loi_list_lock);
753 CDEBUG(D_CACHE, "%s: dirty: %llu undirty: %u dropped %u grant: %llu"
754 " cl_lost_grant %lu\n", cli_name(cli), oa->o_dirty,
755 oa->o_undirty, oa->o_dropped, oa->o_grant, cli->cl_lost_grant);
758 void osc_update_next_shrink(struct client_obd *cli)
760 cli->cl_next_shrink_grant = ktime_get_seconds() +
761 cli->cl_grant_shrink_interval;
763 CDEBUG(D_CACHE, "next time %lld to shrink grant\n",
764 cli->cl_next_shrink_grant);
766 EXPORT_SYMBOL(osc_update_next_shrink);
768 static void __osc_update_grant(struct client_obd *cli, u64 grant)
770 spin_lock(&cli->cl_loi_list_lock);
771 cli->cl_avail_grant += grant;
772 spin_unlock(&cli->cl_loi_list_lock);
775 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
777 if (body->oa.o_valid & OBD_MD_FLGRANT) {
778 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
779 __osc_update_grant(cli, body->oa.o_grant);
784 * grant thread data for shrinking space.
786 struct grant_thread_data {
787 struct list_head gtd_clients;
788 struct mutex gtd_mutex;
789 unsigned long gtd_stopped:1;
791 static struct grant_thread_data client_gtd;
793 static int osc_shrink_grant_interpret(const struct lu_env *env,
794 struct ptlrpc_request *req,
797 struct osc_grant_args *aa = args;
798 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
799 struct ost_body *body;
802 __osc_update_grant(cli, aa->aa_oa->o_grant);
806 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
808 osc_update_grant(cli, body);
810 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
816 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
818 spin_lock(&cli->cl_loi_list_lock);
819 oa->o_grant = cli->cl_avail_grant / 4;
820 cli->cl_avail_grant -= oa->o_grant;
821 spin_unlock(&cli->cl_loi_list_lock);
822 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
823 oa->o_valid |= OBD_MD_FLFLAGS;
826 oa->o_flags |= OBD_FL_SHRINK_GRANT;
827 osc_update_next_shrink(cli);
830 /* Shrink the current grant, either from some large amount to enough for a
831 * full set of in-flight RPCs, or if we have already shrunk to that limit
832 * then to enough for a single RPC. This avoids keeping more grant than
833 * needed, and avoids shrinking the grant piecemeal. */
834 static int osc_shrink_grant(struct client_obd *cli)
836 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
837 (cli->cl_max_pages_per_rpc << PAGE_SHIFT);
839 spin_lock(&cli->cl_loi_list_lock);
840 if (cli->cl_avail_grant <= target_bytes)
841 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
842 spin_unlock(&cli->cl_loi_list_lock);
844 return osc_shrink_grant_to_target(cli, target_bytes);
847 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
850 struct ost_body *body;
853 spin_lock(&cli->cl_loi_list_lock);
854 /* Don't shrink if we are already above or below the desired limit
855 * We don't want to shrink below a single RPC, as that will negatively
856 * impact block allocation and long-term performance. */
857 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_SHIFT)
858 target_bytes = cli->cl_max_pages_per_rpc << PAGE_SHIFT;
860 if (target_bytes >= cli->cl_avail_grant) {
861 spin_unlock(&cli->cl_loi_list_lock);
864 spin_unlock(&cli->cl_loi_list_lock);
870 osc_announce_cached(cli, &body->oa, 0);
872 spin_lock(&cli->cl_loi_list_lock);
873 if (target_bytes >= cli->cl_avail_grant) {
874 /* available grant has changed since target calculation */
875 spin_unlock(&cli->cl_loi_list_lock);
876 GOTO(out_free, rc = 0);
878 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
879 cli->cl_avail_grant = target_bytes;
880 spin_unlock(&cli->cl_loi_list_lock);
881 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
882 body->oa.o_valid |= OBD_MD_FLFLAGS;
883 body->oa.o_flags = 0;
885 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
886 osc_update_next_shrink(cli);
888 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
889 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
890 sizeof(*body), body, NULL);
892 __osc_update_grant(cli, body->oa.o_grant);
898 static int osc_should_shrink_grant(struct client_obd *client)
900 time64_t next_shrink = client->cl_next_shrink_grant;
902 if (client->cl_import == NULL)
905 if (!OCD_HAS_FLAG(&client->cl_import->imp_connect_data, GRANT_SHRINK) ||
906 client->cl_import->imp_grant_shrink_disabled) {
907 osc_update_next_shrink(client);
911 if (ktime_get_seconds() >= next_shrink - 5) {
912 /* Get the current RPC size directly, instead of going via:
913 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
914 * Keep comment here so that it can be found by searching. */
915 int brw_size = client->cl_max_pages_per_rpc << PAGE_SHIFT;
917 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
918 client->cl_avail_grant > brw_size)
921 osc_update_next_shrink(client);
926 #define GRANT_SHRINK_RPC_BATCH 100
928 static struct delayed_work work;
930 static void osc_grant_work_handler(struct work_struct *data)
932 struct client_obd *cli;
934 bool init_next_shrink = true;
935 time64_t next_shrink = ktime_get_seconds() + GRANT_SHRINK_INTERVAL;
938 mutex_lock(&client_gtd.gtd_mutex);
939 list_for_each_entry(cli, &client_gtd.gtd_clients,
941 if (rpc_sent < GRANT_SHRINK_RPC_BATCH &&
942 osc_should_shrink_grant(cli)) {
943 osc_shrink_grant(cli);
947 if (!init_next_shrink) {
948 if (cli->cl_next_shrink_grant < next_shrink &&
949 cli->cl_next_shrink_grant > ktime_get_seconds())
950 next_shrink = cli->cl_next_shrink_grant;
952 init_next_shrink = false;
953 next_shrink = cli->cl_next_shrink_grant;
956 mutex_unlock(&client_gtd.gtd_mutex);
958 if (client_gtd.gtd_stopped == 1)
961 if (next_shrink > ktime_get_seconds()) {
962 time64_t delay = next_shrink - ktime_get_seconds();
964 schedule_delayed_work(&work, cfs_time_seconds(delay));
966 schedule_work(&work.work);
970 void osc_schedule_grant_work(void)
972 cancel_delayed_work_sync(&work);
973 schedule_work(&work.work);
975 EXPORT_SYMBOL(osc_schedule_grant_work);
978 * Start grant thread for returing grant to server for idle clients.
980 static int osc_start_grant_work(void)
982 client_gtd.gtd_stopped = 0;
983 mutex_init(&client_gtd.gtd_mutex);
984 INIT_LIST_HEAD(&client_gtd.gtd_clients);
986 INIT_DELAYED_WORK(&work, osc_grant_work_handler);
987 schedule_work(&work.work);
992 static void osc_stop_grant_work(void)
994 client_gtd.gtd_stopped = 1;
995 cancel_delayed_work_sync(&work);
998 static void osc_add_grant_list(struct client_obd *client)
1000 mutex_lock(&client_gtd.gtd_mutex);
1001 list_add(&client->cl_grant_chain, &client_gtd.gtd_clients);
1002 mutex_unlock(&client_gtd.gtd_mutex);
1005 static void osc_del_grant_list(struct client_obd *client)
1007 if (list_empty(&client->cl_grant_chain))
1010 mutex_lock(&client_gtd.gtd_mutex);
1011 list_del_init(&client->cl_grant_chain);
1012 mutex_unlock(&client_gtd.gtd_mutex);
1015 void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1018 * ocd_grant is the total grant amount we're expect to hold: if we've
1019 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
1020 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
1023 * race is tolerable here: if we're evicted, but imp_state already
1024 * left EVICTED state, then cl_dirty_pages must be 0 already.
1026 spin_lock(&cli->cl_loi_list_lock);
1027 cli->cl_avail_grant = ocd->ocd_grant;
1028 if (cli->cl_import->imp_state != LUSTRE_IMP_EVICTED) {
1029 unsigned long consumed = cli->cl_reserved_grant;
1031 if (OCD_HAS_FLAG(ocd, GRANT_PARAM))
1032 consumed += cli->cl_dirty_grant;
1034 consumed += cli->cl_dirty_pages << PAGE_SHIFT;
1035 if (cli->cl_avail_grant < consumed) {
1036 CERROR("%s: granted %ld but already consumed %ld\n",
1037 cli_name(cli), cli->cl_avail_grant, consumed);
1038 cli->cl_avail_grant = 0;
1040 cli->cl_avail_grant -= consumed;
1044 if (OCD_HAS_FLAG(ocd, GRANT_PARAM)) {
1048 /* overhead for each extent insertion */
1049 cli->cl_grant_extent_tax = ocd->ocd_grant_tax_kb << 10;
1050 /* determine the appropriate chunk size used by osc_extent. */
1051 cli->cl_chunkbits = max_t(int, PAGE_SHIFT,
1052 ocd->ocd_grant_blkbits);
1053 /* max_pages_per_rpc must be chunk aligned */
1054 chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_SHIFT)) - 1);
1055 cli->cl_max_pages_per_rpc = (cli->cl_max_pages_per_rpc +
1056 ~chunk_mask) & chunk_mask;
1057 /* determine maximum extent size, in #pages */
1058 size = (u64)ocd->ocd_grant_max_blks << ocd->ocd_grant_blkbits;
1059 cli->cl_max_extent_pages = (size >> PAGE_SHIFT) ?: 1;
1060 cli->cl_ocd_grant_param = 1;
1062 cli->cl_ocd_grant_param = 0;
1063 cli->cl_grant_extent_tax = 0;
1064 cli->cl_chunkbits = PAGE_SHIFT;
1065 cli->cl_max_extent_pages = DT_MAX_BRW_PAGES;
1067 spin_unlock(&cli->cl_loi_list_lock);
1070 "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld. chunk bits: %d cl_max_extent_pages: %d\n",
1072 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits,
1073 cli->cl_max_extent_pages);
1075 if (OCD_HAS_FLAG(ocd, GRANT_SHRINK) && list_empty(&cli->cl_grant_chain))
1076 osc_add_grant_list(cli);
1078 EXPORT_SYMBOL(osc_init_grant);
1080 /* We assume that the reason this OSC got a short read is because it read
1081 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1082 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1083 * this stripe never got written at or beyond this stripe offset yet. */
1084 static void handle_short_read(int nob_read, size_t page_count,
1085 struct brw_page **pga)
1090 /* skip bytes read OK */
1091 while (nob_read > 0) {
1092 LASSERT (page_count > 0);
1094 if (pga[i]->count > nob_read) {
1095 /* EOF inside this page */
1096 ptr = kmap(pga[i]->pg) +
1097 (pga[i]->off & ~PAGE_MASK);
1098 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1105 nob_read -= pga[i]->count;
1110 /* zero remaining pages */
1111 while (page_count-- > 0) {
1112 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~PAGE_MASK);
1113 memset(ptr, 0, pga[i]->count);
1119 static int check_write_rcs(struct ptlrpc_request *req,
1120 int requested_nob, int niocount,
1121 size_t page_count, struct brw_page **pga)
1126 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1127 sizeof(*remote_rcs) *
1129 if (remote_rcs == NULL) {
1130 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1134 /* return error if any niobuf was in error */
1135 for (i = 0; i < niocount; i++) {
1136 if ((int)remote_rcs[i] < 0) {
1137 CDEBUG(D_INFO, "rc[%d]: %d req %p\n",
1138 i, remote_rcs[i], req);
1139 return remote_rcs[i];
1142 if (remote_rcs[i] != 0) {
1143 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1144 i, remote_rcs[i], req);
1148 if (req->rq_bulk != NULL &&
1149 req->rq_bulk->bd_nob_transferred != requested_nob) {
1150 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1151 req->rq_bulk->bd_nob_transferred, requested_nob);
1158 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1160 if (p1->flag != p2->flag) {
1161 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1162 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1163 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC |
1164 OBD_BRW_SYS_RESOURCE);
1166 /* warn if we try to combine flags that we don't know to be
1167 * safe to combine */
1168 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1169 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1170 "report this at https://jira.whamcloud.com/\n",
1171 p1->flag, p2->flag);
1176 return (p1->off + p1->count == p2->off);
1179 #if IS_ENABLED(CONFIG_CRC_T10DIF)
1180 static int osc_checksum_bulk_t10pi(const char *obd_name, int nob,
1181 size_t pg_count, struct brw_page **pga,
1182 int opc, obd_dif_csum_fn *fn,
1184 u32 *check_sum, bool resend)
1186 struct ahash_request *req;
1187 /* Used Adler as the default checksum type on top of DIF tags */
1188 unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
1189 struct page *__page;
1190 unsigned char *buffer;
1192 unsigned int bufsize;
1194 int used_number = 0;
1200 LASSERT(pg_count > 0);
1202 __page = alloc_page(GFP_KERNEL);
1206 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1209 CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
1210 obd_name, cfs_crypto_hash_name(cfs_alg), rc);
1214 buffer = kmap(__page);
1215 guard_start = (__u16 *)buffer;
1216 guard_number = PAGE_SIZE / sizeof(*guard_start);
1217 CDEBUG(D_PAGE | (resend ? D_HA : 0),
1218 "GRD tags per page=%u, resend=%u, bytes=%u, pages=%zu\n",
1219 guard_number, resend, nob, pg_count);
1221 while (nob > 0 && pg_count > 0) {
1222 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1224 /* corrupt the data before we compute the checksum, to
1225 * simulate an OST->client data error */
1226 if (unlikely(i == 0 && opc == OST_READ &&
1227 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))) {
1228 unsigned char *ptr = kmap(pga[i]->pg);
1229 int off = pga[i]->off & ~PAGE_MASK;
1231 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1236 * The left guard number should be able to hold checksums of a
1239 rc = obd_page_dif_generate_buffer(obd_name, pga[i]->pg,
1240 pga[i]->off & ~PAGE_MASK,
1242 guard_start + used_number,
1243 guard_number - used_number,
1246 if (unlikely(resend))
1247 CDEBUG(D_PAGE | D_HA,
1248 "pga[%u]: used %u off %llu+%u gen checksum: %*phN\n",
1249 i, used, pga[i]->off & ~PAGE_MASK, count,
1250 (int)(used * sizeof(*guard_start)),
1251 guard_start + used_number);
1255 used_number += used;
1256 if (used_number == guard_number) {
1257 cfs_crypto_hash_update_page(req, __page, 0,
1258 used_number * sizeof(*guard_start));
1262 nob -= pga[i]->count;
1270 if (used_number != 0)
1271 cfs_crypto_hash_update_page(req, __page, 0,
1272 used_number * sizeof(*guard_start));
1274 bufsize = sizeof(cksum);
1275 cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
1277 /* For sending we only compute the wrong checksum instead
1278 * of corrupting the data so it is still correct on a redo */
1279 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1284 __free_page(__page);
1287 #else /* !CONFIG_CRC_T10DIF */
1288 #define obd_dif_ip_fn NULL
1289 #define obd_dif_crc_fn NULL
1290 #define osc_checksum_bulk_t10pi(name, nob, pgc, pga, opc, fn, ssize, csum, re) \
1292 #endif /* CONFIG_CRC_T10DIF */
1294 static int osc_checksum_bulk(int nob, size_t pg_count,
1295 struct brw_page **pga, int opc,
1296 enum cksum_types cksum_type,
1300 struct ahash_request *req;
1301 unsigned int bufsize;
1302 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1304 LASSERT(pg_count > 0);
1306 req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1308 CERROR("Unable to initialize checksum hash %s\n",
1309 cfs_crypto_hash_name(cfs_alg));
1310 return PTR_ERR(req);
1313 while (nob > 0 && pg_count > 0) {
1314 unsigned int count = pga[i]->count > nob ? nob : pga[i]->count;
1316 /* corrupt the data before we compute the checksum, to
1317 * simulate an OST->client data error */
1318 if (i == 0 && opc == OST_READ &&
1319 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1320 unsigned char *ptr = kmap(pga[i]->pg);
1321 int off = pga[i]->off & ~PAGE_MASK;
1323 memcpy(ptr + off, "bad1", min_t(typeof(nob), 4, nob));
1326 cfs_crypto_hash_update_page(req, pga[i]->pg,
1327 pga[i]->off & ~PAGE_MASK,
1329 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1330 (int)(pga[i]->off & ~PAGE_MASK));
1332 nob -= pga[i]->count;
1337 bufsize = sizeof(*cksum);
1338 cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
1340 /* For sending we only compute the wrong checksum instead
1341 * of corrupting the data so it is still correct on a redo */
1342 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1348 static int osc_checksum_bulk_rw(const char *obd_name,
1349 enum cksum_types cksum_type,
1350 int nob, size_t pg_count,
1351 struct brw_page **pga, int opc,
1352 u32 *check_sum, bool resend)
1354 obd_dif_csum_fn *fn = NULL;
1355 int sector_size = 0;
1359 obd_t10_cksum2dif(cksum_type, &fn, §or_size);
1362 rc = osc_checksum_bulk_t10pi(obd_name, nob, pg_count, pga,
1363 opc, fn, sector_size, check_sum,
1366 rc = osc_checksum_bulk(nob, pg_count, pga, opc, cksum_type,
1372 static inline void osc_release_bounce_pages(struct brw_page **pga,
1375 #ifdef HAVE_LUSTRE_CRYPTO
1378 for (i = 0; i < page_count; i++) {
1379 /* Bounce pages allocated by a call to
1380 * llcrypt_encrypt_pagecache_blocks() in osc_brw_prep_request()
1381 * are identified thanks to the PageChecked flag.
1383 if (PageChecked(pga[i]->pg))
1384 llcrypt_finalize_bounce_page(&pga[i]->pg);
1385 pga[i]->count -= pga[i]->bp_count_diff;
1386 pga[i]->off += pga[i]->bp_off_diff;
1392 osc_brw_prep_request(int cmd, struct client_obd *cli, struct obdo *oa,
1393 u32 page_count, struct brw_page **pga,
1394 struct ptlrpc_request **reqp, int resend)
1396 struct ptlrpc_request *req;
1397 struct ptlrpc_bulk_desc *desc;
1398 struct ost_body *body;
1399 struct obd_ioobj *ioobj;
1400 struct niobuf_remote *niobuf;
1401 int niocount, i, requested_nob, opc, rc, short_io_size = 0;
1402 struct osc_brw_async_args *aa;
1403 struct req_capsule *pill;
1404 struct brw_page *pg_prev;
1406 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1407 struct inode *inode = NULL;
1408 bool directio = false;
1409 bool enable_checksum = true;
1413 inode = page2inode(pga[0]->pg);
1414 if (inode == NULL) {
1415 /* Try to get reference to inode from cl_page if we are
1416 * dealing with direct IO, as handled pages are not
1417 * actual page cache pages.
1419 struct osc_async_page *oap = brw_page2oap(pga[0]);
1420 struct cl_page *clpage = oap2cl_page(oap);
1422 inode = clpage->cp_inode;
1427 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1428 RETURN(-ENOMEM); /* Recoverable */
1429 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1430 RETURN(-EINVAL); /* Fatal */
1432 if ((cmd & OBD_BRW_WRITE) != 0) {
1434 req = ptlrpc_request_alloc_pool(cli->cl_import,
1436 &RQF_OST_BRW_WRITE);
1439 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1444 if (opc == OST_WRITE && inode && IS_ENCRYPTED(inode) &&
1445 llcrypt_has_encryption_key(inode)) {
1446 for (i = 0; i < page_count; i++) {
1447 struct brw_page *pg = pga[i];
1448 struct page *data_page = NULL;
1449 bool retried = false;
1450 bool lockedbymyself;
1451 u32 nunits = (pg->off & ~PAGE_MASK) + pg->count;
1452 struct address_space *map_orig = NULL;
1456 nunits = round_up(nunits, LUSTRE_ENCRYPTION_UNIT_SIZE);
1457 /* The page can already be locked when we arrive here.
1458 * This is possible when cl_page_assume/vvp_page_assume
1459 * is stuck on wait_on_page_writeback with page lock
1460 * held. In this case there is no risk for the lock to
1461 * be released while we are doing our encryption
1462 * processing, because writeback against that page will
1463 * end in vvp_page_completion_write/cl_page_completion,
1464 * which means only once the page is fully processed.
1466 lockedbymyself = trylock_page(pg->pg);
1468 map_orig = pg->pg->mapping;
1469 pg->pg->mapping = inode->i_mapping;
1470 index_orig = pg->pg->index;
1471 pg->pg->index = pg->off >> PAGE_SHIFT;
1474 llcrypt_encrypt_pagecache_blocks(pg->pg,
1478 pg->pg->mapping = map_orig;
1479 pg->pg->index = index_orig;
1482 unlock_page(pg->pg);
1483 if (IS_ERR(data_page)) {
1484 rc = PTR_ERR(data_page);
1485 if (rc == -ENOMEM && !retried) {
1490 ptlrpc_request_free(req);
1493 /* Set PageChecked flag on bounce page for
1494 * disambiguation in osc_release_bounce_pages().
1496 SetPageChecked(data_page);
1498 /* there should be no gap in the middle of page array */
1499 if (i == page_count - 1) {
1500 struct osc_async_page *oap = brw_page2oap(pg);
1502 oa->o_size = oap->oap_count +
1503 oap->oap_obj_off + oap->oap_page_off;
1505 /* len is forced to nunits, and relative offset to 0
1506 * so store the old, clear text info
1508 pg->bp_count_diff = nunits - pg->count;
1510 pg->bp_off_diff = pg->off & ~PAGE_MASK;
1511 pg->off = pg->off & PAGE_MASK;
1513 } else if (opc == OST_WRITE && inode && IS_ENCRYPTED(inode)) {
1514 struct osc_async_page *oap = brw_page2oap(pga[0]);
1515 struct cl_page *clpage = oap2cl_page(oap);
1516 struct cl_object *clobj = clpage->cp_obj;
1517 struct cl_attr attr = { 0 };
1521 env = cl_env_get(&refcheck);
1524 ptlrpc_request_free(req);
1528 cl_object_attr_lock(clobj);
1529 rc = cl_object_attr_get(env, clobj, &attr);
1530 cl_object_attr_unlock(clobj);
1531 cl_env_put(env, &refcheck);
1533 ptlrpc_request_free(req);
1537 oa->o_size = attr.cat_size;
1538 } else if (opc == OST_READ && inode && IS_ENCRYPTED(inode) &&
1539 llcrypt_has_encryption_key(inode)) {
1540 for (i = 0; i < page_count; i++) {
1541 struct brw_page *pg = pga[i];
1542 u32 nunits = (pg->off & ~PAGE_MASK) + pg->count;
1544 nunits = round_up(nunits, LUSTRE_ENCRYPTION_UNIT_SIZE);
1545 /* count/off are forced to cover the whole encryption
1546 * unit size so that all encrypted data is stored on the
1547 * OST, so adjust bp_{count,off}_diff for the size of
1550 pg->bp_count_diff = nunits - pg->count;
1552 pg->bp_off_diff = pg->off & ~PAGE_MASK;
1553 pg->off = pg->off & PAGE_MASK;
1557 for (niocount = i = 1; i < page_count; i++) {
1558 if (!can_merge_pages(pga[i - 1], pga[i]))
1562 pill = &req->rq_pill;
1563 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1565 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1566 niocount * sizeof(*niobuf));
1568 for (i = 0; i < page_count; i++) {
1569 short_io_size += pga[i]->count;
1570 if (!inode || !IS_ENCRYPTED(inode) ||
1571 !llcrypt_has_encryption_key(inode)) {
1572 pga[i]->bp_count_diff = 0;
1573 pga[i]->bp_off_diff = 0;
1577 if (brw_page2oap(pga[0])->oap_brw_flags & OBD_BRW_RDMA_ONLY) {
1578 enable_checksum = false;
1582 /* Check if read/write is small enough to be a short io. */
1583 if (short_io_size > cli->cl_max_short_io_bytes || niocount > 1 ||
1584 !imp_connect_shortio(cli->cl_import))
1587 /* If this is an empty RPC to old server, just ignore it */
1588 if (!short_io_size && !pga[0]->pg) {
1589 ptlrpc_request_free(req);
1593 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_CLIENT,
1594 opc == OST_READ ? 0 : short_io_size);
1595 if (opc == OST_READ)
1596 req_capsule_set_size(pill, &RMF_SHORT_IO, RCL_SERVER,
1599 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1601 ptlrpc_request_free(req);
1604 osc_set_io_portal(req);
1606 ptlrpc_at_set_req_timeout(req);
1607 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1609 req->rq_no_retry_einprogress = 1;
1611 if (short_io_size != 0) {
1613 short_io_buf = NULL;
1617 desc = ptlrpc_prep_bulk_imp(req, page_count,
1618 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1619 (opc == OST_WRITE ? PTLRPC_BULK_GET_SOURCE :
1620 PTLRPC_BULK_PUT_SINK),
1622 &ptlrpc_bulk_kiov_pin_ops);
1625 GOTO(out, rc = -ENOMEM);
1626 /* NB request now owns desc and will free it when it gets freed */
1628 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1629 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1630 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1631 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1633 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1635 /* For READ and WRITE, we can't fill o_uid and o_gid using from_kuid()
1636 * and from_kgid(), because they are asynchronous. Fortunately, variable
1637 * oa contains valid o_uid and o_gid in these two operations.
1638 * Besides, filling o_uid and o_gid is enough for nrs-tbf, see LU-9658.
1639 * OBD_MD_FLUID and OBD_MD_FLUID is not set in order to avoid breaking
1640 * other process logic */
1641 body->oa.o_uid = oa->o_uid;
1642 body->oa.o_gid = oa->o_gid;
1644 obdo_to_ioobj(oa, ioobj);
1645 ioobj->ioo_bufcnt = niocount;
1646 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1647 * that might be send for this request. The actual number is decided
1648 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1649 * "max - 1" for old client compatibility sending "0", and also so the
1650 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1652 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1654 ioobj_max_brw_set(ioobj, 0);
1656 if (short_io_size != 0) {
1657 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1658 body->oa.o_valid |= OBD_MD_FLFLAGS;
1659 body->oa.o_flags = 0;
1661 body->oa.o_flags |= OBD_FL_SHORT_IO;
1662 CDEBUG(D_CACHE, "Using short io for data transfer, size = %d\n",
1664 if (opc == OST_WRITE) {
1665 short_io_buf = req_capsule_client_get(pill,
1667 LASSERT(short_io_buf != NULL);
1671 LASSERT(page_count > 0);
1673 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1674 struct brw_page *pg = pga[i];
1675 int poff = pg->off & ~PAGE_MASK;
1677 LASSERT(pg->count > 0);
1678 /* make sure there is no gap in the middle of page array */
1679 LASSERTF(page_count == 1 ||
1680 (ergo(i == 0, poff + pg->count == PAGE_SIZE) &&
1681 ergo(i > 0 && i < page_count - 1,
1682 poff == 0 && pg->count == PAGE_SIZE) &&
1683 ergo(i == page_count - 1, poff == 0)),
1684 "i: %d/%d pg: %p off: %llu, count: %u\n",
1685 i, page_count, pg, pg->off, pg->count);
1686 LASSERTF(i == 0 || pg->off > pg_prev->off,
1687 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1688 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1690 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1691 pg_prev->pg, page_private(pg_prev->pg),
1692 pg_prev->pg->index, pg_prev->off);
1693 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1694 (pg->flag & OBD_BRW_SRVLOCK));
1695 if (short_io_size != 0 && opc == OST_WRITE) {
1696 unsigned char *ptr = kmap_atomic(pg->pg);
1698 LASSERT(short_io_size >= requested_nob + pg->count);
1699 memcpy(short_io_buf + requested_nob,
1703 } else if (short_io_size == 0) {
1704 desc->bd_frag_ops->add_kiov_frag(desc, pg->pg, poff,
1707 requested_nob += pg->count;
1709 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1711 niobuf->rnb_len += pg->count;
1713 niobuf->rnb_offset = pg->off;
1714 niobuf->rnb_len = pg->count;
1715 niobuf->rnb_flags = pg->flag;
1720 LASSERTF((void *)(niobuf - niocount) ==
1721 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1722 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1723 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1725 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1727 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1728 body->oa.o_valid |= OBD_MD_FLFLAGS;
1729 body->oa.o_flags = 0;
1731 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1734 if (osc_should_shrink_grant(cli))
1735 osc_shrink_grant_local(cli, &body->oa);
1737 if (!cli->cl_checksum || sptlrpc_flavor_has_bulk(&req->rq_flvr))
1738 enable_checksum = false;
1740 /* size[REQ_REC_OFF] still sizeof (*body) */
1741 if (opc == OST_WRITE) {
1742 if (enable_checksum) {
1743 /* store cl_cksum_type in a local variable since
1744 * it can be changed via lprocfs */
1745 enum cksum_types cksum_type = cli->cl_cksum_type;
1747 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1748 body->oa.o_flags = 0;
1750 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1752 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1754 rc = osc_checksum_bulk_rw(obd_name, cksum_type,
1755 requested_nob, page_count,
1757 &body->oa.o_cksum, resend);
1759 CDEBUG(D_PAGE, "failed to checksum: rc = %d\n",
1763 CDEBUG(D_PAGE | (resend ? D_HA : 0),
1764 "checksum at write origin: %x (%x)\n",
1765 body->oa.o_cksum, cksum_type);
1767 /* save this in 'oa', too, for later checking */
1768 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1769 oa->o_flags |= obd_cksum_type_pack(obd_name,
1772 /* clear out the checksum flag, in case this is a
1773 * resend but cl_checksum is no longer set. b=11238 */
1774 oa->o_valid &= ~OBD_MD_FLCKSUM;
1776 oa->o_cksum = body->oa.o_cksum;
1777 /* 1 RC per niobuf */
1778 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1779 sizeof(__u32) * niocount);
1781 if (enable_checksum) {
1782 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1783 body->oa.o_flags = 0;
1784 body->oa.o_flags |= obd_cksum_type_pack(obd_name,
1785 cli->cl_cksum_type);
1786 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1789 /* Client cksum has been already copied to wire obdo in previous
1790 * lustre_set_wire_obdo(), and in the case a bulk-read is being
1791 * resent due to cksum error, this will allow Server to
1792 * check+dump pages on its side */
1794 ptlrpc_request_set_replen(req);
1796 aa = ptlrpc_req_async_args(aa, req);
1798 aa->aa_requested_nob = requested_nob;
1799 aa->aa_nio_count = niocount;
1800 aa->aa_page_count = page_count;
1804 INIT_LIST_HEAD(&aa->aa_oaps);
1807 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1808 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1809 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1810 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1814 ptlrpc_req_finished(req);
1818 char dbgcksum_file_name[PATH_MAX];
1820 static void dump_all_bulk_pages(struct obdo *oa, __u32 page_count,
1821 struct brw_page **pga, __u32 server_cksum,
1829 /* will only keep dump of pages on first error for the same range in
1830 * file/fid, not during the resends/retries. */
1831 snprintf(dbgcksum_file_name, sizeof(dbgcksum_file_name),
1832 "%s-checksum_dump-osc-"DFID":[%llu-%llu]-%x-%x",
1833 (strncmp(libcfs_debug_file_path, "NONE", 4) != 0 ?
1834 libcfs_debug_file_path : LIBCFS_DEBUG_FILE_PATH_DEFAULT),
1835 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
1836 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1837 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1839 pga[page_count-1]->off + pga[page_count-1]->count - 1,
1840 client_cksum, server_cksum);
1841 CWARN("dumping checksum data to %s\n", dbgcksum_file_name);
1842 filp = filp_open(dbgcksum_file_name,
1843 O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
1847 CDEBUG(D_INFO, "%s: can't open to dump pages with "
1848 "checksum error: rc = %d\n", dbgcksum_file_name,
1851 CERROR("%s: can't open to dump pages with checksum "
1852 "error: rc = %d\n", dbgcksum_file_name, rc);
1856 for (i = 0; i < page_count; i++) {
1857 len = pga[i]->count;
1858 buf = kmap(pga[i]->pg);
1860 rc = cfs_kernel_write(filp, buf, len, &filp->f_pos);
1862 CERROR("%s: wanted to write %u but got %d "
1863 "error\n", dbgcksum_file_name, len, rc);
1872 rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
1874 CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
1875 filp_close(filp, NULL);
1877 libcfs_debug_dumplog();
1881 check_write_checksum(struct obdo *oa, const struct lnet_processid *peer,
1882 __u32 client_cksum, __u32 server_cksum,
1883 struct osc_brw_async_args *aa)
1885 const char *obd_name = aa->aa_cli->cl_import->imp_obd->obd_name;
1886 enum cksum_types cksum_type;
1887 obd_dif_csum_fn *fn = NULL;
1888 int sector_size = 0;
1893 if (server_cksum == client_cksum) {
1894 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1898 if (aa->aa_cli->cl_checksum_dump)
1899 dump_all_bulk_pages(oa, aa->aa_page_count, aa->aa_ppga,
1900 server_cksum, client_cksum);
1902 cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1905 switch (cksum_type) {
1906 case OBD_CKSUM_T10IP512:
1910 case OBD_CKSUM_T10IP4K:
1914 case OBD_CKSUM_T10CRC512:
1915 fn = obd_dif_crc_fn;
1918 case OBD_CKSUM_T10CRC4K:
1919 fn = obd_dif_crc_fn;
1927 rc = osc_checksum_bulk_t10pi(obd_name, aa->aa_requested_nob,
1928 aa->aa_page_count, aa->aa_ppga,
1929 OST_WRITE, fn, sector_size,
1932 rc = osc_checksum_bulk(aa->aa_requested_nob, aa->aa_page_count,
1933 aa->aa_ppga, OST_WRITE, cksum_type,
1937 msg = "failed to calculate the client write checksum";
1938 else if (cksum_type != obd_cksum_type_unpack(aa->aa_oa->o_flags))
1939 msg = "the server did not use the checksum type specified in "
1940 "the original request - likely a protocol problem";
1941 else if (new_cksum == server_cksum)
1942 msg = "changed on the client after we checksummed it - "
1943 "likely false positive due to mmap IO (bug 11742)";
1944 else if (new_cksum == client_cksum)
1945 msg = "changed in transit before arrival at OST";
1947 msg = "changed in transit AND doesn't match the original - "
1948 "likely false positive due to mmap IO (bug 11742)";
1950 LCONSOLE_ERROR_MSG(0x132, "%s: BAD WRITE CHECKSUM: %s: from %s inode "
1951 DFID " object "DOSTID" extent [%llu-%llu], original "
1952 "client csum %x (type %x), server csum %x (type %x),"
1953 " client csum now %x\n",
1954 obd_name, msg, libcfs_nidstr(&peer->nid),
1955 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1956 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1957 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1958 POSTID(&oa->o_oi), aa->aa_ppga[0]->off,
1959 aa->aa_ppga[aa->aa_page_count - 1]->off +
1960 aa->aa_ppga[aa->aa_page_count-1]->count - 1,
1962 obd_cksum_type_unpack(aa->aa_oa->o_flags),
1963 server_cksum, cksum_type, new_cksum);
1967 /* Note rc enters this function as number of bytes transferred */
1968 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1970 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1971 struct client_obd *cli = aa->aa_cli;
1972 const char *obd_name = cli->cl_import->imp_obd->obd_name;
1973 const struct lnet_processid *peer =
1974 &req->rq_import->imp_connection->c_peer;
1975 struct ost_body *body;
1976 u32 client_cksum = 0;
1977 struct inode *inode;
1978 unsigned int blockbits = 0, blocksize = 0;
1982 if (rc < 0 && rc != -EDQUOT) {
1983 DEBUG_REQ(D_INFO, req, "Failed request: rc = %d", rc);
1987 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1988 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1990 DEBUG_REQ(D_INFO, req, "cannot unpack body");
1994 /* set/clear over quota flag for a uid/gid/projid */
1995 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1996 body->oa.o_valid & (OBD_MD_FLALLQUOTA)) {
1997 unsigned qid[LL_MAXQUOTAS] = {
1998 body->oa.o_uid, body->oa.o_gid,
1999 body->oa.o_projid };
2001 "setdq for [%u %u %u] with valid %#llx, flags %x\n",
2002 body->oa.o_uid, body->oa.o_gid, body->oa.o_projid,
2003 body->oa.o_valid, body->oa.o_flags);
2004 osc_quota_setdq(cli, req->rq_xid, qid, body->oa.o_valid,
2008 osc_update_grant(cli, body);
2013 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
2014 client_cksum = aa->aa_oa->o_cksum; /* save for later */
2016 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2018 CERROR("%s: unexpected positive size %d\n",
2023 if (req->rq_bulk != NULL &&
2024 sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
2027 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
2028 check_write_checksum(&body->oa, peer, client_cksum,
2029 body->oa.o_cksum, aa))
2032 rc = check_write_rcs(req, aa->aa_requested_nob,
2033 aa->aa_nio_count, aa->aa_page_count,
2038 /* The rest of this function executes only for OST_READs */
2040 if (req->rq_bulk == NULL) {
2041 rc = req_capsule_get_size(&req->rq_pill, &RMF_SHORT_IO,
2043 LASSERT(rc == req->rq_status);
2045 /* if unwrap_bulk failed, return -EAGAIN to retry */
2046 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
2049 GOTO(out, rc = -EAGAIN);
2051 if (rc > aa->aa_requested_nob) {
2052 CERROR("%s: unexpected size %d, requested %d\n", obd_name,
2053 rc, aa->aa_requested_nob);
2057 if (req->rq_bulk != NULL && rc != req->rq_bulk->bd_nob_transferred) {
2058 CERROR("%s: unexpected size %d, transferred %d\n", obd_name,
2059 rc, req->rq_bulk->bd_nob_transferred);
2063 if (req->rq_bulk == NULL) {
2065 int nob, pg_count, i = 0;
2068 CDEBUG(D_CACHE, "Using short io read, size %d\n", rc);
2069 pg_count = aa->aa_page_count;
2070 buf = req_capsule_server_sized_get(&req->rq_pill, &RMF_SHORT_IO,
2073 while (nob > 0 && pg_count > 0) {
2075 int count = aa->aa_ppga[i]->count > nob ?
2076 nob : aa->aa_ppga[i]->count;
2078 CDEBUG(D_CACHE, "page %p count %d\n",
2079 aa->aa_ppga[i]->pg, count);
2080 ptr = kmap_atomic(aa->aa_ppga[i]->pg);
2081 memcpy(ptr + (aa->aa_ppga[i]->off & ~PAGE_MASK), buf,
2083 kunmap_atomic((void *) ptr);
2092 if (rc < aa->aa_requested_nob)
2093 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
2095 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
2096 static int cksum_counter;
2097 u32 server_cksum = body->oa.o_cksum;
2101 enum cksum_types cksum_type;
2102 u32 o_flags = body->oa.o_valid & OBD_MD_FLFLAGS ?
2103 body->oa.o_flags : 0;
2105 cksum_type = obd_cksum_type_unpack(o_flags);
2106 rc = osc_checksum_bulk_rw(obd_name, cksum_type, nob,
2107 aa->aa_page_count, aa->aa_ppga,
2108 OST_READ, &client_cksum, false);
2112 if (req->rq_bulk != NULL &&
2113 lnet_nid_to_nid4(&peer->nid) != req->rq_bulk->bd_sender) {
2115 router = libcfs_nid2str(req->rq_bulk->bd_sender);
2118 if (server_cksum != client_cksum) {
2119 struct ost_body *clbody;
2120 __u32 client_cksum2;
2121 u32 page_count = aa->aa_page_count;
2123 osc_checksum_bulk_rw(obd_name, cksum_type, nob,
2124 page_count, aa->aa_ppga,
2125 OST_READ, &client_cksum2, true);
2126 clbody = req_capsule_client_get(&req->rq_pill,
2128 if (cli->cl_checksum_dump)
2129 dump_all_bulk_pages(&clbody->oa, page_count,
2130 aa->aa_ppga, server_cksum,
2133 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
2134 "%s%s%s inode "DFID" object "DOSTID
2135 " extent [%llu-%llu], client %x/%x, "
2136 "server %x, cksum_type %x\n",
2138 libcfs_nidstr(&peer->nid),
2140 clbody->oa.o_valid & OBD_MD_FLFID ?
2141 clbody->oa.o_parent_seq : 0ULL,
2142 clbody->oa.o_valid & OBD_MD_FLFID ?
2143 clbody->oa.o_parent_oid : 0,
2144 clbody->oa.o_valid & OBD_MD_FLFID ?
2145 clbody->oa.o_parent_ver : 0,
2146 POSTID(&body->oa.o_oi),
2147 aa->aa_ppga[0]->off,
2148 aa->aa_ppga[page_count-1]->off +
2149 aa->aa_ppga[page_count-1]->count - 1,
2150 client_cksum, client_cksum2,
2151 server_cksum, cksum_type);
2153 aa->aa_oa->o_cksum = client_cksum;
2157 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
2160 } else if (unlikely(client_cksum)) {
2161 static int cksum_missed;
2164 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
2165 CERROR("%s: checksum %u requested from %s but not sent\n",
2166 obd_name, cksum_missed,
2167 libcfs_nidstr(&peer->nid));
2172 inode = page2inode(aa->aa_ppga[0]->pg);
2173 if (inode == NULL) {
2174 /* Try to get reference to inode from cl_page if we are
2175 * dealing with direct IO, as handled pages are not
2176 * actual page cache pages.
2178 struct osc_async_page *oap = brw_page2oap(aa->aa_ppga[0]);
2180 inode = oap2cl_page(oap)->cp_inode;
2182 blockbits = inode->i_blkbits;
2183 blocksize = 1 << blockbits;
2186 if (inode && IS_ENCRYPTED(inode)) {
2189 if (!llcrypt_has_encryption_key(inode)) {
2190 CDEBUG(D_SEC, "no enc key for ino %lu\n", inode->i_ino);
2193 for (idx = 0; idx < aa->aa_page_count; idx++) {
2194 struct brw_page *pg = aa->aa_ppga[idx];
2195 unsigned int offs = 0;
2197 while (offs < PAGE_SIZE) {
2198 /* do not decrypt if page is all 0s */
2199 if (memchr_inv(page_address(pg->pg) + offs, 0,
2200 LUSTRE_ENCRYPTION_UNIT_SIZE) == NULL) {
2201 /* if page is empty forward info to
2202 * upper layers (ll_io_zero_page) by
2203 * clearing PagePrivate2
2206 ClearPagePrivate2(pg->pg);
2211 /* This is direct IO case. Directly call
2212 * decrypt function that takes inode as
2213 * input parameter. Page does not need
2217 ((u64)(pg->off >> PAGE_SHIFT) <<
2218 (PAGE_SHIFT - blockbits)) +
2219 (offs >> blockbits);
2224 LUSTRE_ENCRYPTION_UNIT_SIZE;
2225 i += blocksize, lblk_num++) {
2227 llcrypt_decrypt_block_inplace(
2235 rc = llcrypt_decrypt_pagecache_blocks(
2237 LUSTRE_ENCRYPTION_UNIT_SIZE,
2243 offs += LUSTRE_ENCRYPTION_UNIT_SIZE;
2250 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
2251 aa->aa_oa, &body->oa);
2256 static int osc_brw_redo_request(struct ptlrpc_request *request,
2257 struct osc_brw_async_args *aa, int rc)
2259 struct ptlrpc_request *new_req;
2260 struct osc_brw_async_args *new_aa;
2261 struct osc_async_page *oap;
2264 /* The below message is checked in replay-ost-single.sh test_8ae*/
2265 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
2266 "redo for recoverable error %d", rc);
2268 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
2269 OST_WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
2270 aa->aa_cli, aa->aa_oa, aa->aa_page_count,
2271 aa->aa_ppga, &new_req, 1);
2275 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2276 if (oap->oap_request != NULL) {
2277 LASSERTF(request == oap->oap_request,
2278 "request %p != oap_request %p\n",
2279 request, oap->oap_request);
2283 * New request takes over pga and oaps from old request.
2284 * Note that copying a list_head doesn't work, need to move it...
2287 new_req->rq_interpret_reply = request->rq_interpret_reply;
2288 new_req->rq_async_args = request->rq_async_args;
2289 new_req->rq_commit_cb = request->rq_commit_cb;
2290 /* cap resend delay to the current request timeout, this is similar to
2291 * what ptlrpc does (see after_reply()) */
2292 if (aa->aa_resends > new_req->rq_timeout)
2293 new_req->rq_sent = ktime_get_real_seconds() + new_req->rq_timeout;
2295 new_req->rq_sent = ktime_get_real_seconds() + aa->aa_resends;
2296 new_req->rq_generation_set = 1;
2297 new_req->rq_import_generation = request->rq_import_generation;
2299 new_aa = ptlrpc_req_async_args(new_aa, new_req);
2301 INIT_LIST_HEAD(&new_aa->aa_oaps);
2302 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
2303 INIT_LIST_HEAD(&new_aa->aa_exts);
2304 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
2305 new_aa->aa_resends = aa->aa_resends;
2307 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
2308 if (oap->oap_request) {
2309 ptlrpc_req_finished(oap->oap_request);
2310 oap->oap_request = ptlrpc_request_addref(new_req);
2314 /* XXX: This code will run into problem if we're going to support
2315 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
2316 * and wait for all of them to be finished. We should inherit request
2317 * set from old request. */
2318 ptlrpcd_add_req(new_req);
2320 DEBUG_REQ(D_INFO, new_req, "new request");
2325 * ugh, we want disk allocation on the target to happen in offset order. we'll
2326 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
2327 * fine for our small page arrays and doesn't require allocation. its an
2328 * insertion sort that swaps elements that are strides apart, shrinking the
2329 * stride down until its '1' and the array is sorted.
2331 static void sort_brw_pages(struct brw_page **array, int num)
2334 struct brw_page *tmp;
2338 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
2343 for (i = stride ; i < num ; i++) {
2346 while (j >= stride && array[j - stride]->off > tmp->off) {
2347 array[j] = array[j - stride];
2352 } while (stride > 1);
2355 static void osc_release_ppga(struct brw_page **ppga, size_t count)
2357 LASSERT(ppga != NULL);
2358 OBD_FREE_PTR_ARRAY_LARGE(ppga, count);
2361 static int brw_interpret(const struct lu_env *env,
2362 struct ptlrpc_request *req, void *args, int rc)
2364 struct osc_brw_async_args *aa = args;
2365 struct osc_extent *ext;
2366 struct osc_extent *tmp;
2367 struct client_obd *cli = aa->aa_cli;
2368 unsigned long transferred = 0;
2372 rc = osc_brw_fini_request(req, rc);
2373 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2375 /* restore clear text pages */
2376 osc_release_bounce_pages(aa->aa_ppga, aa->aa_page_count);
2379 * When server returns -EINPROGRESS, client should always retry
2380 * regardless of the number of times the bulk was resent already.
2382 if (osc_recoverable_error(rc) && !req->rq_no_delay) {
2383 if (req->rq_import_generation !=
2384 req->rq_import->imp_generation) {
2385 CDEBUG(D_HA, "%s: resend cross eviction for object: "
2386 ""DOSTID", rc = %d.\n",
2387 req->rq_import->imp_obd->obd_name,
2388 POSTID(&aa->aa_oa->o_oi), rc);
2389 } else if (rc == -EINPROGRESS ||
2390 client_should_resend(aa->aa_resends, aa->aa_cli)) {
2391 rc = osc_brw_redo_request(req, aa, rc);
2393 CERROR("%s: too many resent retries for object: "
2394 "%llu:%llu, rc = %d.\n",
2395 req->rq_import->imp_obd->obd_name,
2396 POSTID(&aa->aa_oa->o_oi), rc);
2401 else if (rc == -EAGAIN || rc == -EINPROGRESS)
2406 struct obdo *oa = aa->aa_oa;
2407 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
2408 unsigned long valid = 0;
2409 struct cl_object *obj;
2410 struct osc_async_page *last;
2412 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
2413 obj = osc2cl(last->oap_obj);
2415 cl_object_attr_lock(obj);
2416 if (oa->o_valid & OBD_MD_FLBLOCKS) {
2417 attr->cat_blocks = oa->o_blocks;
2418 valid |= CAT_BLOCKS;
2420 if (oa->o_valid & OBD_MD_FLMTIME) {
2421 attr->cat_mtime = oa->o_mtime;
2424 if (oa->o_valid & OBD_MD_FLATIME) {
2425 attr->cat_atime = oa->o_atime;
2428 if (oa->o_valid & OBD_MD_FLCTIME) {
2429 attr->cat_ctime = oa->o_ctime;
2433 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
2434 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
2435 loff_t last_off = last->oap_count + last->oap_obj_off +
2438 /* Change file size if this is an out of quota or
2439 * direct IO write and it extends the file size */
2440 if (loi->loi_lvb.lvb_size < last_off) {
2441 attr->cat_size = last_off;
2444 /* Extend KMS if it's not a lockless write */
2445 if (loi->loi_kms < last_off &&
2446 oap2osc_page(last)->ops_srvlock == 0) {
2447 attr->cat_kms = last_off;
2453 cl_object_attr_update(env, obj, attr, valid);
2454 cl_object_attr_unlock(obj);
2456 OBD_SLAB_FREE_PTR(aa->aa_oa, osc_obdo_kmem);
2459 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
2460 osc_inc_unstable_pages(req);
2462 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
2463 list_del_init(&ext->oe_link);
2464 osc_extent_finish(env, ext, 1,
2465 rc && req->rq_no_delay ? -EAGAIN : rc);
2467 LASSERT(list_empty(&aa->aa_exts));
2468 LASSERT(list_empty(&aa->aa_oaps));
2470 transferred = (req->rq_bulk == NULL ? /* short io */
2471 aa->aa_requested_nob :
2472 req->rq_bulk->bd_nob_transferred);
2474 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2475 ptlrpc_lprocfs_brw(req, transferred);
2477 spin_lock(&cli->cl_loi_list_lock);
2478 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2479 * is called so we know whether to go to sync BRWs or wait for more
2480 * RPCs to complete */
2481 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2482 cli->cl_w_in_flight--;
2484 cli->cl_r_in_flight--;
2485 osc_wake_cache_waiters(cli);
2486 spin_unlock(&cli->cl_loi_list_lock);
2488 osc_io_unplug(env, cli, NULL);
2492 static void brw_commit(struct ptlrpc_request *req)
2494 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
2495 * this called via the rq_commit_cb, I need to ensure
2496 * osc_dec_unstable_pages is still called. Otherwise unstable
2497 * pages may be leaked. */
2498 spin_lock(&req->rq_lock);
2499 if (likely(req->rq_unstable)) {
2500 req->rq_unstable = 0;
2501 spin_unlock(&req->rq_lock);
2503 osc_dec_unstable_pages(req);
2505 req->rq_committed = 1;
2506 spin_unlock(&req->rq_lock);
2511 * Build an RPC by the list of extent @ext_list. The caller must ensure
2512 * that the total pages in this list are NOT over max pages per RPC.
2513 * Extents in the list must be in OES_RPC state.
2515 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
2516 struct list_head *ext_list, int cmd)
2518 struct ptlrpc_request *req = NULL;
2519 struct osc_extent *ext;
2520 struct brw_page **pga = NULL;
2521 struct osc_brw_async_args *aa = NULL;
2522 struct obdo *oa = NULL;
2523 struct osc_async_page *oap;
2524 struct osc_object *obj = NULL;
2525 struct cl_req_attr *crattr = NULL;
2526 loff_t starting_offset = OBD_OBJECT_EOF;
2527 loff_t ending_offset = 0;
2528 /* '1' for consistency with code that checks !mpflag to restore */
2532 bool soft_sync = false;
2533 bool ndelay = false;
2537 __u32 layout_version = 0;
2538 LIST_HEAD(rpc_list);
2539 struct ost_body *body;
2541 LASSERT(!list_empty(ext_list));
2543 /* add pages into rpc_list to build BRW rpc */
2544 list_for_each_entry(ext, ext_list, oe_link) {
2545 LASSERT(ext->oe_state == OES_RPC);
2546 mem_tight |= ext->oe_memalloc;
2547 grant += ext->oe_grants;
2548 page_count += ext->oe_nr_pages;
2549 layout_version = max(layout_version, ext->oe_layout_version);
2554 soft_sync = osc_over_unstable_soft_limit(cli);
2556 mpflag = memalloc_noreclaim_save();
2558 OBD_ALLOC_PTR_ARRAY_LARGE(pga, page_count);
2560 GOTO(out, rc = -ENOMEM);
2562 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
2564 GOTO(out, rc = -ENOMEM);
2567 list_for_each_entry(ext, ext_list, oe_link) {
2568 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
2570 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2572 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
2573 pga[i] = &oap->oap_brw_page;
2574 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2577 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2578 if (starting_offset == OBD_OBJECT_EOF ||
2579 starting_offset > oap->oap_obj_off)
2580 starting_offset = oap->oap_obj_off;
2582 LASSERT(oap->oap_page_off == 0);
2583 if (ending_offset < oap->oap_obj_off + oap->oap_count)
2584 ending_offset = oap->oap_obj_off +
2587 LASSERT(oap->oap_page_off + oap->oap_count ==
2594 /* first page in the list */
2595 oap = list_first_entry(&rpc_list, typeof(*oap), oap_rpc_item);
2597 crattr = &osc_env_info(env)->oti_req_attr;
2598 memset(crattr, 0, sizeof(*crattr));
2599 crattr->cra_type = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2600 crattr->cra_flags = ~0ULL;
2601 crattr->cra_page = oap2cl_page(oap);
2602 crattr->cra_oa = oa;
2603 cl_req_attr_set(env, osc2cl(obj), crattr);
2605 if (cmd == OBD_BRW_WRITE) {
2606 oa->o_grant_used = grant;
2607 if (layout_version > 0) {
2608 CDEBUG(D_LAYOUT, DFID": write with layout version %u\n",
2609 PFID(&oa->o_oi.oi_fid), layout_version);
2611 oa->o_layout_version = layout_version;
2612 oa->o_valid |= OBD_MD_LAYOUT_VERSION;
2616 sort_brw_pages(pga, page_count);
2617 rc = osc_brw_prep_request(cmd, cli, oa, page_count, pga, &req, 0);
2619 CERROR("prep_req failed: %d\n", rc);
2623 req->rq_commit_cb = brw_commit;
2624 req->rq_interpret_reply = brw_interpret;
2625 req->rq_memalloc = mem_tight != 0;
2626 oap->oap_request = ptlrpc_request_addref(req);
2628 req->rq_no_resend = req->rq_no_delay = 1;
2629 /* probably set a shorter timeout value.
2630 * to handle ETIMEDOUT in brw_interpret() correctly. */
2631 /* lustre_msg_set_timeout(req, req->rq_timeout / 2); */
2634 /* Need to update the timestamps after the request is built in case
2635 * we race with setattr (locally or in queue at OST). If OST gets
2636 * later setattr before earlier BRW (as determined by the request xid),
2637 * the OST will not use BRW timestamps. Sadly, there is no obvious
2638 * way to do this in a single call. bug 10150 */
2639 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2640 crattr->cra_oa = &body->oa;
2641 crattr->cra_flags = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2642 cl_req_attr_set(env, osc2cl(obj), crattr);
2643 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2645 aa = ptlrpc_req_async_args(aa, req);
2646 INIT_LIST_HEAD(&aa->aa_oaps);
2647 list_splice_init(&rpc_list, &aa->aa_oaps);
2648 INIT_LIST_HEAD(&aa->aa_exts);
2649 list_splice_init(ext_list, &aa->aa_exts);
2651 spin_lock(&cli->cl_loi_list_lock);
2652 starting_offset >>= PAGE_SHIFT;
2653 if (cmd == OBD_BRW_READ) {
2654 cli->cl_r_in_flight++;
2655 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2656 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2657 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2658 starting_offset + 1);
2660 cli->cl_w_in_flight++;
2661 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2662 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2663 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2664 starting_offset + 1);
2666 spin_unlock(&cli->cl_loi_list_lock);
2668 DEBUG_REQ(D_INODE, req, "%d pages, aa %p, now %ur/%uw in flight",
2669 page_count, aa, cli->cl_r_in_flight,
2670 cli->cl_w_in_flight);
2671 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DELAY_IO, cfs_fail_val);
2673 ptlrpcd_add_req(req);
2679 memalloc_noreclaim_restore(mpflag);
2682 LASSERT(req == NULL);
2685 OBD_SLAB_FREE_PTR(oa, osc_obdo_kmem);
2687 osc_release_bounce_pages(pga, page_count);
2688 osc_release_ppga(pga, page_count);
2690 /* this should happen rarely and is pretty bad, it makes the
2691 * pending list not follow the dirty order
2693 while ((ext = list_first_entry_or_null(ext_list,
2695 oe_link)) != NULL) {
2696 list_del_init(&ext->oe_link);
2697 osc_extent_finish(env, ext, 0, rc);
2703 /* This is to refresh our lock in face of no RPCs. */
2704 void osc_send_empty_rpc(struct osc_object *osc, pgoff_t start)
2706 struct ptlrpc_request *req;
2708 struct brw_page bpg = { .off = start, .count = 1};
2709 struct brw_page *pga = &bpg;
2712 memset(&oa, 0, sizeof(oa));
2713 oa.o_oi = osc->oo_oinfo->loi_oi;
2714 oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLFLAGS;
2715 /* For updated servers - don't do a read */
2716 oa.o_flags = OBD_FL_NORPC;
2718 rc = osc_brw_prep_request(OBD_BRW_READ, osc_cli(osc), &oa, 1, &pga,
2721 /* If we succeeded we ship it off, if not there's no point in doing
2722 * anything. Also no resends.
2723 * No interpret callback, no commit callback.
2726 req->rq_no_resend = 1;
2727 ptlrpcd_add_req(req);
2731 static int osc_set_lock_data(struct ldlm_lock *lock, void *data)
2735 LASSERT(lock != NULL);
2737 lock_res_and_lock(lock);
2739 if (lock->l_ast_data == NULL)
2740 lock->l_ast_data = data;
2741 if (lock->l_ast_data == data)
2744 unlock_res_and_lock(lock);
2749 int osc_enqueue_fini(struct ptlrpc_request *req, osc_enqueue_upcall_f upcall,
2750 void *cookie, struct lustre_handle *lockh,
2751 enum ldlm_mode mode, __u64 *flags, bool speculative,
2754 bool intent = *flags & LDLM_FL_HAS_INTENT;
2758 /* The request was created before ldlm_cli_enqueue call. */
2759 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2760 struct ldlm_reply *rep;
2762 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2763 LASSERT(rep != NULL);
2765 rep->lock_policy_res1 =
2766 ptlrpc_status_ntoh(rep->lock_policy_res1);
2767 if (rep->lock_policy_res1)
2768 errcode = rep->lock_policy_res1;
2770 *flags |= LDLM_FL_LVB_READY;
2771 } else if (errcode == ELDLM_OK) {
2772 *flags |= LDLM_FL_LVB_READY;
2775 /* Call the update callback. */
2776 rc = (*upcall)(cookie, lockh, errcode);
2778 /* release the reference taken in ldlm_cli_enqueue() */
2779 if (errcode == ELDLM_LOCK_MATCHED)
2781 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2782 ldlm_lock_decref(lockh, mode);
2787 int osc_enqueue_interpret(const struct lu_env *env, struct ptlrpc_request *req,
2790 struct osc_enqueue_args *aa = args;
2791 struct ldlm_lock *lock;
2792 struct lustre_handle *lockh = &aa->oa_lockh;
2793 enum ldlm_mode mode = aa->oa_mode;
2794 struct ost_lvb *lvb = aa->oa_lvb;
2795 __u32 lvb_len = sizeof(*lvb);
2797 struct ldlm_enqueue_info einfo = {
2798 .ei_type = aa->oa_type,
2804 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2806 lock = ldlm_handle2lock(lockh);
2807 LASSERTF(lock != NULL,
2808 "lockh %#llx, req %p, aa %p - client evicted?\n",
2809 lockh->cookie, req, aa);
2811 /* Take an additional reference so that a blocking AST that
2812 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2813 * to arrive after an upcall has been executed by
2814 * osc_enqueue_fini(). */
2815 ldlm_lock_addref(lockh, mode);
2817 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2818 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2820 /* Let CP AST to grant the lock first. */
2821 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2823 if (aa->oa_speculative) {
2824 LASSERT(aa->oa_lvb == NULL);
2825 LASSERT(aa->oa_flags == NULL);
2826 aa->oa_flags = &flags;
2829 /* Complete obtaining the lock procedure. */
2830 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, &einfo, 1, aa->oa_flags,
2831 lvb, lvb_len, lockh, rc, false);
2832 /* Complete osc stuff. */
2833 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2834 aa->oa_flags, aa->oa_speculative, rc);
2836 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2838 ldlm_lock_decref(lockh, mode);
2839 LDLM_LOCK_PUT(lock);
2843 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2844 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2845 * other synchronous requests, however keeping some locks and trying to obtain
2846 * others may take a considerable amount of time in a case of ost failure; and
2847 * when other sync requests do not get released lock from a client, the client
2848 * is evicted from the cluster -- such scenarious make the life difficult, so
2849 * release locks just after they are obtained. */
2850 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2851 __u64 *flags, union ldlm_policy_data *policy,
2852 struct ost_lvb *lvb, osc_enqueue_upcall_f upcall,
2853 void *cookie, struct ldlm_enqueue_info *einfo,
2854 struct ptlrpc_request_set *rqset, int async,
2857 struct obd_device *obd = exp->exp_obd;
2858 struct lustre_handle lockh = { 0 };
2859 struct ptlrpc_request *req = NULL;
2860 int intent = *flags & LDLM_FL_HAS_INTENT;
2861 __u64 match_flags = *flags;
2862 enum ldlm_mode mode;
2866 /* Filesystem lock extents are extended to page boundaries so that
2867 * dealing with the page cache is a little smoother. */
2868 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2869 policy->l_extent.end |= ~PAGE_MASK;
2871 /* Next, search for already existing extent locks that will cover us */
2872 /* If we're trying to read, we also search for an existing PW lock. The
2873 * VFS and page cache already protect us locally, so lots of readers/
2874 * writers can share a single PW lock.
2876 * There are problems with conversion deadlocks, so instead of
2877 * converting a read lock to a write lock, we'll just enqueue a new
2880 * At some point we should cancel the read lock instead of making them
2881 * send us a blocking callback, but there are problems with canceling
2882 * locks out from other users right now, too. */
2883 mode = einfo->ei_mode;
2884 if (einfo->ei_mode == LCK_PR)
2886 /* Normal lock requests must wait for the LVB to be ready before
2887 * matching a lock; speculative lock requests do not need to,
2888 * because they will not actually use the lock. */
2890 match_flags |= LDLM_FL_LVB_READY;
2892 match_flags |= LDLM_FL_BLOCK_GRANTED;
2893 mode = ldlm_lock_match(obd->obd_namespace, match_flags, res_id,
2894 einfo->ei_type, policy, mode, &lockh);
2896 struct ldlm_lock *matched;
2898 if (*flags & LDLM_FL_TEST_LOCK)
2901 matched = ldlm_handle2lock(&lockh);
2903 /* This DLM lock request is speculative, and does not
2904 * have an associated IO request. Therefore if there
2905 * is already a DLM lock, it wll just inform the
2906 * caller to cancel the request for this stripe.*/
2907 lock_res_and_lock(matched);
2908 if (ldlm_extent_equal(&policy->l_extent,
2909 &matched->l_policy_data.l_extent))
2913 unlock_res_and_lock(matched);
2915 ldlm_lock_decref(&lockh, mode);
2916 LDLM_LOCK_PUT(matched);
2918 } else if (osc_set_lock_data(matched, einfo->ei_cbdata)) {
2919 *flags |= LDLM_FL_LVB_READY;
2921 /* We already have a lock, and it's referenced. */
2922 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2924 ldlm_lock_decref(&lockh, mode);
2925 LDLM_LOCK_PUT(matched);
2928 ldlm_lock_decref(&lockh, mode);
2929 LDLM_LOCK_PUT(matched);
2933 if (*flags & (LDLM_FL_TEST_LOCK | LDLM_FL_MATCH_LOCK))
2936 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2937 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2939 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2940 sizeof(*lvb), LVB_T_OST, &lockh, async);
2943 struct osc_enqueue_args *aa;
2944 aa = ptlrpc_req_async_args(aa, req);
2946 aa->oa_mode = einfo->ei_mode;
2947 aa->oa_type = einfo->ei_type;
2948 lustre_handle_copy(&aa->oa_lockh, &lockh);
2949 aa->oa_upcall = upcall;
2950 aa->oa_cookie = cookie;
2951 aa->oa_speculative = speculative;
2953 aa->oa_flags = flags;
2956 /* speculative locks are essentially to enqueue
2957 * a DLM lock in advance, so we don't care
2958 * about the result of the enqueue. */
2960 aa->oa_flags = NULL;
2963 req->rq_interpret_reply = osc_enqueue_interpret;
2964 ptlrpc_set_add_req(rqset, req);
2969 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2970 flags, speculative, rc);
2975 int osc_match_base(const struct lu_env *env, struct obd_export *exp,
2976 struct ldlm_res_id *res_id, enum ldlm_type type,
2977 union ldlm_policy_data *policy, enum ldlm_mode mode,
2978 __u64 *flags, struct osc_object *obj,
2979 struct lustre_handle *lockh, enum ldlm_match_flags match_flags)
2981 struct obd_device *obd = exp->exp_obd;
2982 __u64 lflags = *flags;
2986 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2989 /* Filesystem lock extents are extended to page boundaries so that
2990 * dealing with the page cache is a little smoother */
2991 policy->l_extent.start -= policy->l_extent.start & ~PAGE_MASK;
2992 policy->l_extent.end |= ~PAGE_MASK;
2994 /* Next, search for already existing extent locks that will cover us */
2995 rc = ldlm_lock_match_with_skip(obd->obd_namespace, lflags, 0,
2996 res_id, type, policy, mode, lockh,
2998 if (rc == 0 || lflags & LDLM_FL_TEST_LOCK)
3002 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3004 LASSERT(lock != NULL);
3005 if (osc_set_lock_data(lock, obj)) {
3006 lock_res_and_lock(lock);
3007 if (!ldlm_is_lvb_cached(lock)) {
3008 LASSERT(lock->l_ast_data == obj);
3009 osc_lock_lvb_update(env, obj, lock, NULL);
3010 ldlm_set_lvb_cached(lock);
3012 unlock_res_and_lock(lock);
3014 ldlm_lock_decref(lockh, rc);
3017 LDLM_LOCK_PUT(lock);
3022 static int osc_statfs_interpret(const struct lu_env *env,
3023 struct ptlrpc_request *req, void *args, int rc)
3025 struct osc_async_args *aa = args;
3026 struct obd_statfs *msfs;
3031 * The request has in fact never been sent due to issues at
3032 * a higher level (LOV). Exit immediately since the caller
3033 * is aware of the problem and takes care of the clean up.
3037 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3038 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3044 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3046 GOTO(out, rc = -EPROTO);
3048 *aa->aa_oi->oi_osfs = *msfs;
3050 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3055 static int osc_statfs_async(struct obd_export *exp,
3056 struct obd_info *oinfo, time64_t max_age,
3057 struct ptlrpc_request_set *rqset)
3059 struct obd_device *obd = class_exp2obd(exp);
3060 struct ptlrpc_request *req;
3061 struct osc_async_args *aa;
3065 if (obd->obd_osfs_age >= max_age) {
3067 "%s: use %p cache blocks %llu/%llu objects %llu/%llu\n",
3068 obd->obd_name, &obd->obd_osfs,
3069 obd->obd_osfs.os_bavail, obd->obd_osfs.os_blocks,
3070 obd->obd_osfs.os_ffree, obd->obd_osfs.os_files);
3071 spin_lock(&obd->obd_osfs_lock);
3072 memcpy(oinfo->oi_osfs, &obd->obd_osfs, sizeof(*oinfo->oi_osfs));
3073 spin_unlock(&obd->obd_osfs_lock);
3074 oinfo->oi_flags |= OBD_STATFS_FROM_CACHE;
3075 if (oinfo->oi_cb_up)
3076 oinfo->oi_cb_up(oinfo, 0);
3081 /* We could possibly pass max_age in the request (as an absolute
3082 * timestamp or a "seconds.usec ago") so the target can avoid doing
3083 * extra calls into the filesystem if that isn't necessary (e.g.
3084 * during mount that would help a bit). Having relative timestamps
3085 * is not so great if request processing is slow, while absolute
3086 * timestamps are not ideal because they need time synchronization. */
3087 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3091 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3093 ptlrpc_request_free(req);
3096 ptlrpc_request_set_replen(req);
3097 req->rq_request_portal = OST_CREATE_PORTAL;
3098 ptlrpc_at_set_req_timeout(req);
3100 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3101 /* procfs requests not want stat in wait for avoid deadlock */
3102 req->rq_no_resend = 1;
3103 req->rq_no_delay = 1;
3106 req->rq_interpret_reply = osc_statfs_interpret;
3107 aa = ptlrpc_req_async_args(aa, req);
3110 ptlrpc_set_add_req(rqset, req);
3114 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
3115 struct obd_statfs *osfs, time64_t max_age, __u32 flags)
3117 struct obd_device *obd = class_exp2obd(exp);
3118 struct obd_statfs *msfs;
3119 struct ptlrpc_request *req;
3120 struct obd_import *imp, *imp0;
3124 /*Since the request might also come from lprocfs, so we need
3125 *sync this with client_disconnect_export Bug15684
3127 with_imp_locked(obd, imp0, rc)
3128 imp = class_import_get(imp0);
3132 /* We could possibly pass max_age in the request (as an absolute
3133 * timestamp or a "seconds.usec ago") so the target can avoid doing
3134 * extra calls into the filesystem if that isn't necessary (e.g.
3135 * during mount that would help a bit). Having relative timestamps
3136 * is not so great if request processing is slow, while absolute
3137 * timestamps are not ideal because they need time synchronization. */
3138 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3140 class_import_put(imp);
3145 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3147 ptlrpc_request_free(req);
3150 ptlrpc_request_set_replen(req);
3151 req->rq_request_portal = OST_CREATE_PORTAL;
3152 ptlrpc_at_set_req_timeout(req);
3154 if (flags & OBD_STATFS_NODELAY) {
3155 /* procfs requests not want stat in wait for avoid deadlock */
3156 req->rq_no_resend = 1;
3157 req->rq_no_delay = 1;
3160 rc = ptlrpc_queue_wait(req);
3164 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3166 GOTO(out, rc = -EPROTO);
3172 ptlrpc_req_finished(req);
3176 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3177 void *karg, void __user *uarg)
3179 struct obd_device *obd = exp->exp_obd;
3180 struct obd_ioctl_data *data = karg;
3184 if (!try_module_get(THIS_MODULE)) {
3185 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
3186 module_name(THIS_MODULE));
3190 case OBD_IOC_CLIENT_RECOVER:
3191 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
3192 data->ioc_inlbuf1, 0);
3196 case IOC_OSC_SET_ACTIVE:
3197 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
3202 CDEBUG(D_INODE, "%s: unrecognised ioctl %#x by %s: rc = %d\n",
3203 obd->obd_name, cmd, current->comm, rc);
3207 module_put(THIS_MODULE);
3211 int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
3212 u32 keylen, void *key, u32 vallen, void *val,
3213 struct ptlrpc_request_set *set)
3215 struct ptlrpc_request *req;
3216 struct obd_device *obd = exp->exp_obd;
3217 struct obd_import *imp = class_exp2cliimp(exp);
3222 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3224 if (KEY_IS(KEY_CHECKSUM)) {
3225 if (vallen != sizeof(int))
3227 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3231 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3232 sptlrpc_conf_client_adapt(obd);
3236 if (KEY_IS(KEY_FLUSH_CTX)) {
3237 sptlrpc_import_flush_my_ctx(imp);
3241 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
3242 struct client_obd *cli = &obd->u.cli;
3243 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
3244 long target = *(long *)val;
3246 nr = osc_lru_shrink(env, cli, min(nr, target), true);
3251 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3254 /* We pass all other commands directly to OST. Since nobody calls osc
3255 methods directly and everybody is supposed to go through LOV, we
3256 assume lov checked invalid values for us.
3257 The only recognised values so far are evict_by_nid and mds_conn.
3258 Even if something bad goes through, we'd get a -EINVAL from OST
3261 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
3262 &RQF_OST_SET_GRANT_INFO :
3267 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3268 RCL_CLIENT, keylen);
3269 if (!KEY_IS(KEY_GRANT_SHRINK))
3270 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3271 RCL_CLIENT, vallen);
3272 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3274 ptlrpc_request_free(req);
3278 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3279 memcpy(tmp, key, keylen);
3280 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
3283 memcpy(tmp, val, vallen);
3285 if (KEY_IS(KEY_GRANT_SHRINK)) {
3286 struct osc_grant_args *aa;
3289 aa = ptlrpc_req_async_args(aa, req);
3290 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
3292 ptlrpc_req_finished(req);
3295 *oa = ((struct ost_body *)val)->oa;
3297 req->rq_interpret_reply = osc_shrink_grant_interpret;
3300 ptlrpc_request_set_replen(req);
3301 if (!KEY_IS(KEY_GRANT_SHRINK)) {
3302 LASSERT(set != NULL);
3303 ptlrpc_set_add_req(set, req);
3304 ptlrpc_check_set(NULL, set);
3306 ptlrpcd_add_req(req);
3311 EXPORT_SYMBOL(osc_set_info_async);
3313 int osc_reconnect(const struct lu_env *env, struct obd_export *exp,
3314 struct obd_device *obd, struct obd_uuid *cluuid,
3315 struct obd_connect_data *data, void *localdata)
3317 struct client_obd *cli = &obd->u.cli;
3319 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3323 spin_lock(&cli->cl_loi_list_lock);
3324 grant = cli->cl_avail_grant + cli->cl_reserved_grant;
3325 if (data->ocd_connect_flags & OBD_CONNECT_GRANT_PARAM) {
3326 /* restore ocd_grant_blkbits as client page bits */
3327 data->ocd_grant_blkbits = PAGE_SHIFT;
3328 grant += cli->cl_dirty_grant;
3330 grant += cli->cl_dirty_pages << PAGE_SHIFT;
3332 data->ocd_grant = grant ? : 2 * cli_brw_size(obd);
3333 lost_grant = cli->cl_lost_grant;
3334 cli->cl_lost_grant = 0;
3335 spin_unlock(&cli->cl_loi_list_lock);
3337 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
3338 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
3339 data->ocd_version, data->ocd_grant, lost_grant);
3344 EXPORT_SYMBOL(osc_reconnect);
3346 int osc_disconnect(struct obd_export *exp)
3348 struct obd_device *obd = class_exp2obd(exp);
3351 rc = client_disconnect_export(exp);
3353 * Initially we put del_shrink_grant before disconnect_export, but it
3354 * causes the following problem if setup (connect) and cleanup
3355 * (disconnect) are tangled together.
3356 * connect p1 disconnect p2
3357 * ptlrpc_connect_import
3358 * ............... class_manual_cleanup
3361 * ptlrpc_connect_interrupt
3363 * add this client to shrink list
3365 * Bang! grant shrink thread trigger the shrink. BUG18662
3367 osc_del_grant_list(&obd->u.cli);
3370 EXPORT_SYMBOL(osc_disconnect);
3372 int osc_ldlm_resource_invalidate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
3373 struct hlist_node *hnode, void *arg)
3375 struct lu_env *env = arg;
3376 struct ldlm_resource *res = cfs_hash_object(hs, hnode);
3377 struct ldlm_lock *lock;
3378 struct osc_object *osc = NULL;
3382 list_for_each_entry(lock, &res->lr_granted, l_res_link) {
3383 if (lock->l_ast_data != NULL && osc == NULL) {
3384 osc = lock->l_ast_data;
3385 cl_object_get(osc2cl(osc));
3388 /* clear LDLM_FL_CLEANED flag to make sure it will be canceled
3389 * by the 2nd round of ldlm_namespace_clean() call in
3390 * osc_import_event(). */
3391 ldlm_clear_cleaned(lock);
3396 osc_object_invalidate(env, osc);
3397 cl_object_put(env, osc2cl(osc));
3402 EXPORT_SYMBOL(osc_ldlm_resource_invalidate);
3404 static int osc_import_event(struct obd_device *obd,
3405 struct obd_import *imp,
3406 enum obd_import_event event)
3408 struct client_obd *cli;
3412 LASSERT(imp->imp_obd == obd);
3415 case IMP_EVENT_DISCON: {
3417 spin_lock(&cli->cl_loi_list_lock);
3418 cli->cl_avail_grant = 0;
3419 cli->cl_lost_grant = 0;
3420 spin_unlock(&cli->cl_loi_list_lock);
3423 case IMP_EVENT_INACTIVE: {
3424 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
3427 case IMP_EVENT_INVALIDATE: {
3428 struct ldlm_namespace *ns = obd->obd_namespace;
3432 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3434 env = cl_env_get(&refcheck);
3436 osc_io_unplug(env, &obd->u.cli, NULL);
3438 cfs_hash_for_each_nolock(ns->ns_rs_hash,
3439 osc_ldlm_resource_invalidate,
3441 cl_env_put(env, &refcheck);
3443 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3448 case IMP_EVENT_ACTIVE: {
3449 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
3452 case IMP_EVENT_OCD: {
3453 struct obd_connect_data *ocd = &imp->imp_connect_data;
3455 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3456 osc_init_grant(&obd->u.cli, ocd);
3459 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3460 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3462 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
3465 case IMP_EVENT_DEACTIVATE: {
3466 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE);
3469 case IMP_EVENT_ACTIVATE: {
3470 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE);
3474 CERROR("Unknown import event %d\n", event);
3481 * Determine whether the lock can be canceled before replaying the lock
3482 * during recovery, see bug16774 for detailed information.
3484 * \retval zero the lock can't be canceled
3485 * \retval other ok to cancel
3487 static int osc_cancel_weight(struct ldlm_lock *lock)
3490 * Cancel all unused and granted extent lock.
3492 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3493 ldlm_is_granted(lock) &&
3494 osc_ldlm_weigh_ast(lock) == 0)
3500 static int brw_queue_work(const struct lu_env *env, void *data)
3502 struct client_obd *cli = data;
3504 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3506 osc_io_unplug(env, cli, NULL);
3510 int osc_setup_common(struct obd_device *obd, struct lustre_cfg *lcfg)
3512 struct client_obd *cli = &obd->u.cli;
3518 rc = ptlrpcd_addref();
3522 rc = client_obd_setup(obd, lcfg);
3524 GOTO(out_ptlrpcd, rc);
3527 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3528 if (IS_ERR(handler))
3529 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3530 cli->cl_writeback_work = handler;
3532 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3533 if (IS_ERR(handler))
3534 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3535 cli->cl_lru_work = handler;
3537 rc = osc_quota_setup(obd);
3539 GOTO(out_ptlrpcd_work, rc);
3541 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3542 cli->cl_root_squash = 0;
3543 osc_update_next_shrink(cli);
3548 if (cli->cl_writeback_work != NULL) {
3549 ptlrpcd_destroy_work(cli->cl_writeback_work);
3550 cli->cl_writeback_work = NULL;
3552 if (cli->cl_lru_work != NULL) {
3553 ptlrpcd_destroy_work(cli->cl_lru_work);
3554 cli->cl_lru_work = NULL;
3556 client_obd_cleanup(obd);
3561 EXPORT_SYMBOL(osc_setup_common);
3563 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3565 struct client_obd *cli = &obd->u.cli;
3573 rc = osc_setup_common(obd, lcfg);
3577 rc = osc_tunables_init(obd);
3582 * We try to control the total number of requests with a upper limit
3583 * osc_reqpool_maxreqcount. There might be some race which will cause
3584 * over-limit allocation, but it is fine.
3586 req_count = atomic_read(&osc_pool_req_count);
3587 if (req_count < osc_reqpool_maxreqcount) {
3588 adding = cli->cl_max_rpcs_in_flight + 2;
3589 if (req_count + adding > osc_reqpool_maxreqcount)
3590 adding = osc_reqpool_maxreqcount - req_count;
3592 added = ptlrpc_add_rqs_to_pool(osc_rq_pool, adding);
3593 atomic_add(added, &osc_pool_req_count);
3596 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3598 spin_lock(&osc_shrink_lock);
3599 list_add_tail(&cli->cl_shrink_list, &osc_shrink_list);
3600 spin_unlock(&osc_shrink_lock);
3601 cli->cl_import->imp_idle_timeout = osc_idle_timeout;
3602 cli->cl_import->imp_idle_debug = D_HA;
3607 int osc_precleanup_common(struct obd_device *obd)
3609 struct client_obd *cli = &obd->u.cli;
3613 * for echo client, export may be on zombie list, wait for
3614 * zombie thread to cull it, because cli.cl_import will be
3615 * cleared in client_disconnect_export():
3616 * class_export_destroy() -> obd_cleanup() ->
3617 * echo_device_free() -> echo_client_cleanup() ->
3618 * obd_disconnect() -> osc_disconnect() ->
3619 * client_disconnect_export()
3621 obd_zombie_barrier();
3622 if (cli->cl_writeback_work) {
3623 ptlrpcd_destroy_work(cli->cl_writeback_work);
3624 cli->cl_writeback_work = NULL;
3627 if (cli->cl_lru_work) {
3628 ptlrpcd_destroy_work(cli->cl_lru_work);
3629 cli->cl_lru_work = NULL;
3632 obd_cleanup_client_import(obd);
3635 EXPORT_SYMBOL(osc_precleanup_common);
3637 static int osc_precleanup(struct obd_device *obd)
3641 osc_precleanup_common(obd);
3643 ptlrpc_lprocfs_unregister_obd(obd);
3647 int osc_cleanup_common(struct obd_device *obd)
3649 struct client_obd *cli = &obd->u.cli;
3654 spin_lock(&osc_shrink_lock);
3655 list_del(&cli->cl_shrink_list);
3656 spin_unlock(&osc_shrink_lock);
3659 if (cli->cl_cache != NULL) {
3660 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3661 spin_lock(&cli->cl_cache->ccc_lru_lock);
3662 list_del_init(&cli->cl_lru_osc);
3663 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3664 cli->cl_lru_left = NULL;
3665 cl_cache_decref(cli->cl_cache);
3666 cli->cl_cache = NULL;
3669 /* free memory of osc quota cache */
3670 osc_quota_cleanup(obd);
3672 rc = client_obd_cleanup(obd);
3677 EXPORT_SYMBOL(osc_cleanup_common);
3679 static const struct obd_ops osc_obd_ops = {
3680 .o_owner = THIS_MODULE,
3681 .o_setup = osc_setup,
3682 .o_precleanup = osc_precleanup,
3683 .o_cleanup = osc_cleanup_common,
3684 .o_add_conn = client_import_add_conn,
3685 .o_del_conn = client_import_del_conn,
3686 .o_connect = client_connect_import,
3687 .o_reconnect = osc_reconnect,
3688 .o_disconnect = osc_disconnect,
3689 .o_statfs = osc_statfs,
3690 .o_statfs_async = osc_statfs_async,
3691 .o_create = osc_create,
3692 .o_destroy = osc_destroy,
3693 .o_getattr = osc_getattr,
3694 .o_setattr = osc_setattr,
3695 .o_iocontrol = osc_iocontrol,
3696 .o_set_info_async = osc_set_info_async,
3697 .o_import_event = osc_import_event,
3698 .o_quotactl = osc_quotactl,
3701 LIST_HEAD(osc_shrink_list);
3702 DEFINE_SPINLOCK(osc_shrink_lock);
3704 #ifdef HAVE_SHRINKER_COUNT
3705 static struct shrinker osc_cache_shrinker = {
3706 .count_objects = osc_cache_shrink_count,
3707 .scan_objects = osc_cache_shrink_scan,
3708 .seeks = DEFAULT_SEEKS,
3711 static int osc_cache_shrink(struct shrinker *shrinker,
3712 struct shrink_control *sc)
3714 (void)osc_cache_shrink_scan(shrinker, sc);
3716 return osc_cache_shrink_count(shrinker, sc);
3719 static struct shrinker osc_cache_shrinker = {
3720 .shrink = osc_cache_shrink,
3721 .seeks = DEFAULT_SEEKS,
3725 static int __init osc_init(void)
3727 unsigned int reqpool_size;
3728 unsigned int reqsize;
3732 /* print an address of _any_ initialized kernel symbol from this
3733 * module, to allow debugging with gdb that doesn't support data
3734 * symbols from modules.*/
3735 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3737 rc = lu_kmem_init(osc_caches);
3741 rc = class_register_type(&osc_obd_ops, NULL, true,
3742 LUSTRE_OSC_NAME, &osc_device_type);
3746 rc = register_shrinker(&osc_cache_shrinker);
3750 /* This is obviously too much memory, only prevent overflow here */
3751 if (osc_reqpool_mem_max >= 1 << 12 || osc_reqpool_mem_max == 0)
3752 GOTO(out_shrinker, rc = -EINVAL);
3754 reqpool_size = osc_reqpool_mem_max << 20;
3757 while (reqsize < OST_IO_MAXREQSIZE)
3758 reqsize = reqsize << 1;
3761 * We don't enlarge the request count in OSC pool according to
3762 * cl_max_rpcs_in_flight. The allocation from the pool will only be
3763 * tried after normal allocation failed. So a small OSC pool won't
3764 * cause much performance degression in most of cases.
3766 osc_reqpool_maxreqcount = reqpool_size / reqsize;
3768 atomic_set(&osc_pool_req_count, 0);
3769 osc_rq_pool = ptlrpc_init_rq_pool(0, OST_IO_MAXREQSIZE,
3770 ptlrpc_add_rqs_to_pool);
3772 if (osc_rq_pool == NULL)
3773 GOTO(out_shrinker, rc = -ENOMEM);
3775 rc = osc_start_grant_work();
3777 GOTO(out_req_pool, rc);
3782 ptlrpc_free_rq_pool(osc_rq_pool);
3784 unregister_shrinker(&osc_cache_shrinker);
3786 class_unregister_type(LUSTRE_OSC_NAME);
3788 lu_kmem_fini(osc_caches);
3793 static void __exit osc_exit(void)
3795 osc_stop_grant_work();
3796 unregister_shrinker(&osc_cache_shrinker);
3797 class_unregister_type(LUSTRE_OSC_NAME);
3798 lu_kmem_fini(osc_caches);
3799 ptlrpc_free_rq_pool(osc_rq_pool);
3802 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3803 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3804 MODULE_VERSION(LUSTRE_VERSION_STRING);
3805 MODULE_LICENSE("GPL");
3807 module_init(osc_init);
3808 module_exit(osc_exit);