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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_OSC
39 #include <libcfs/libcfs.h>
42 #include <lustre_dlm.h>
43 #include <lustre_net.h>
44 #include <lustre/lustre_user.h>
45 #include <obd_cksum.h>
46 #include <lustre_ha.h>
47 #include <lprocfs_status.h>
48 #include <lustre_ioctl.h>
49 #include <lustre_log.h>
50 #include <lustre_debug.h>
51 #include <lustre_param.h>
52 #include <lustre_fid.h>
53 #include "osc_internal.h"
54 #include "osc_cl_internal.h"
56 struct osc_brw_async_args {
60 obd_count aa_page_count;
62 struct brw_page **aa_ppga;
63 struct client_obd *aa_cli;
64 struct list_head aa_oaps;
65 struct list_head aa_exts;
66 struct obd_capa *aa_ocapa;
67 struct cl_req *aa_clerq;
70 #define osc_grant_args osc_brw_async_args
72 struct osc_async_args {
73 struct obd_info *aa_oi;
76 struct osc_setattr_args {
78 obd_enqueue_update_f sa_upcall;
82 struct osc_fsync_args {
83 struct obd_info *fa_oi;
84 obd_enqueue_update_f fa_upcall;
88 struct osc_enqueue_args {
89 struct obd_export *oa_exp;
91 obd_enqueue_update_f oa_upcall;
93 struct ost_lvb *oa_lvb;
94 struct lustre_handle *oa_lockh;
95 struct ldlm_enqueue_info *oa_ei;
96 unsigned int oa_agl:1;
99 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
100 static int brw_interpret(const struct lu_env *env, struct ptlrpc_request *req,
103 /* Unpack OSC object metadata from disk storage (LE byte order). */
104 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
105 struct lov_mds_md *lmm, int lmm_bytes)
108 struct obd_import *imp = class_exp2cliimp(exp);
112 if (lmm_bytes < sizeof(*lmm)) {
113 CERROR("%s: lov_mds_md too small: %d, need %d\n",
114 exp->exp_obd->obd_name, lmm_bytes,
118 /* XXX LOV_MAGIC etc check? */
120 if (unlikely(ostid_id(&lmm->lmm_oi) == 0)) {
121 CERROR("%s: zero lmm_object_id: rc = %d\n",
122 exp->exp_obd->obd_name, -EINVAL);
127 lsm_size = lov_stripe_md_size(1);
131 if (*lsmp != NULL && lmm == NULL) {
132 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
133 OBD_FREE(*lsmp, lsm_size);
139 OBD_ALLOC(*lsmp, lsm_size);
140 if (unlikely(*lsmp == NULL))
142 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
143 if (unlikely((*lsmp)->lsm_oinfo[0] == NULL)) {
144 OBD_FREE(*lsmp, lsm_size);
147 loi_init((*lsmp)->lsm_oinfo[0]);
148 } else if (unlikely(ostid_id(&(*lsmp)->lsm_oi) == 0)) {
153 /* XXX zero *lsmp? */
154 ostid_le_to_cpu(&lmm->lmm_oi, &(*lsmp)->lsm_oi);
157 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
158 (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
160 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
165 static inline void osc_pack_capa(struct ptlrpc_request *req,
166 struct ost_body *body, void *capa)
168 struct obd_capa *oc = (struct obd_capa *)capa;
169 struct lustre_capa *c;
174 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
177 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
178 DEBUG_CAPA(D_SEC, c, "pack");
181 static inline void osc_pack_req_body(struct ptlrpc_request *req,
182 struct obd_info *oinfo)
184 struct ost_body *body;
186 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
189 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
191 osc_pack_capa(req, body, oinfo->oi_capa);
194 static inline void osc_set_capa_size(struct ptlrpc_request *req,
195 const struct req_msg_field *field,
199 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
201 /* it is already calculated as sizeof struct obd_capa */
205 static int osc_getattr_interpret(const struct lu_env *env,
206 struct ptlrpc_request *req,
207 struct osc_async_args *aa, int rc)
209 struct ost_body *body;
215 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
217 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
218 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
219 aa->aa_oi->oi_oa, &body->oa);
221 /* This should really be sent by the OST */
222 aa->aa_oi->oi_oa->o_blksize = DT_MAX_BRW_SIZE;
223 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
225 CDEBUG(D_INFO, "can't unpack ost_body\n");
227 aa->aa_oi->oi_oa->o_valid = 0;
230 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
234 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
235 struct ptlrpc_request_set *set)
237 struct ptlrpc_request *req;
238 struct osc_async_args *aa;
242 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
246 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
247 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
249 ptlrpc_request_free(req);
253 osc_pack_req_body(req, oinfo);
255 ptlrpc_request_set_replen(req);
256 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
258 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
259 aa = ptlrpc_req_async_args(req);
262 ptlrpc_set_add_req(set, req);
266 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
267 struct obd_info *oinfo)
269 struct ptlrpc_request *req;
270 struct ost_body *body;
274 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
278 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
279 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
281 ptlrpc_request_free(req);
285 osc_pack_req_body(req, oinfo);
287 ptlrpc_request_set_replen(req);
289 rc = ptlrpc_queue_wait(req);
293 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
295 GOTO(out, rc = -EPROTO);
297 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
298 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
301 oinfo->oi_oa->o_blksize = cli_brw_size(exp->exp_obd);
302 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
306 ptlrpc_req_finished(req);
310 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
311 struct obd_info *oinfo, struct obd_trans_info *oti)
313 struct ptlrpc_request *req;
314 struct ost_body *body;
318 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
320 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
324 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
325 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
327 ptlrpc_request_free(req);
331 osc_pack_req_body(req, oinfo);
333 ptlrpc_request_set_replen(req);
335 rc = ptlrpc_queue_wait(req);
339 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
341 GOTO(out, rc = -EPROTO);
343 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
348 ptlrpc_req_finished(req);
352 static int osc_setattr_interpret(const struct lu_env *env,
353 struct ptlrpc_request *req,
354 struct osc_setattr_args *sa, int rc)
356 struct ost_body *body;
362 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
364 GOTO(out, rc = -EPROTO);
366 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
369 rc = sa->sa_upcall(sa->sa_cookie, rc);
373 int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
374 struct obd_trans_info *oti,
375 obd_enqueue_update_f upcall, void *cookie,
376 struct ptlrpc_request_set *rqset)
378 struct ptlrpc_request *req;
379 struct osc_setattr_args *sa;
383 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
387 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
388 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
390 ptlrpc_request_free(req);
394 if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
395 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
397 osc_pack_req_body(req, oinfo);
399 ptlrpc_request_set_replen(req);
401 /* do mds to ost setattr asynchronously */
403 /* Do not wait for response. */
404 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
406 req->rq_interpret_reply =
407 (ptlrpc_interpterer_t)osc_setattr_interpret;
409 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
410 sa = ptlrpc_req_async_args(req);
411 sa->sa_oa = oinfo->oi_oa;
412 sa->sa_upcall = upcall;
413 sa->sa_cookie = cookie;
415 if (rqset == PTLRPCD_SET)
416 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
418 ptlrpc_set_add_req(rqset, req);
424 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
425 struct obd_trans_info *oti,
426 struct ptlrpc_request_set *rqset)
428 return osc_setattr_async_base(exp, oinfo, oti,
429 oinfo->oi_cb_up, oinfo, rqset);
432 int osc_real_create(struct obd_export *exp, struct obdo *oa,
433 struct lov_stripe_md **ea, struct obd_trans_info *oti)
435 struct ptlrpc_request *req;
436 struct ost_body *body;
437 struct lov_stripe_md *lsm;
446 rc = obd_alloc_memmd(exp, &lsm);
451 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
453 GOTO(out, rc = -ENOMEM);
455 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
457 ptlrpc_request_free(req);
461 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
464 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
466 ptlrpc_request_set_replen(req);
468 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
469 oa->o_flags == OBD_FL_DELORPHAN) {
471 "delorphan from OST integration");
472 /* Don't resend the delorphan req */
473 req->rq_no_resend = req->rq_no_delay = 1;
476 rc = ptlrpc_queue_wait(req);
480 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
482 GOTO(out_req, rc = -EPROTO);
484 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
485 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
487 oa->o_blksize = cli_brw_size(exp->exp_obd);
488 oa->o_valid |= OBD_MD_FLBLKSZ;
490 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
491 * have valid lsm_oinfo data structs, so don't go touching that.
492 * This needs to be fixed in a big way.
494 lsm->lsm_oi = oa->o_oi;
498 if (oa->o_valid & OBD_MD_FLCOOKIE) {
499 if (oti->oti_logcookies == NULL)
500 oti->oti_logcookies = &oti->oti_onecookie;
502 *oti->oti_logcookies = oa->o_lcookie;
506 CDEBUG(D_HA, "transno: "LPD64"\n",
507 lustre_msg_get_transno(req->rq_repmsg));
509 ptlrpc_req_finished(req);
512 obd_free_memmd(exp, &lsm);
516 int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
517 obd_enqueue_update_f upcall, void *cookie,
518 struct ptlrpc_request_set *rqset)
520 struct ptlrpc_request *req;
521 struct osc_setattr_args *sa;
522 struct ost_body *body;
526 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
530 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
531 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
533 ptlrpc_request_free(req);
536 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
537 ptlrpc_at_set_req_timeout(req);
539 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
541 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
543 osc_pack_capa(req, body, oinfo->oi_capa);
545 ptlrpc_request_set_replen(req);
547 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
548 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
549 sa = ptlrpc_req_async_args(req);
550 sa->sa_oa = oinfo->oi_oa;
551 sa->sa_upcall = upcall;
552 sa->sa_cookie = cookie;
553 if (rqset == PTLRPCD_SET)
554 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
556 ptlrpc_set_add_req(rqset, req);
561 static int osc_sync_interpret(const struct lu_env *env,
562 struct ptlrpc_request *req,
565 struct osc_fsync_args *fa = arg;
566 struct ost_body *body;
572 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
574 CERROR ("can't unpack ost_body\n");
575 GOTO(out, rc = -EPROTO);
578 *fa->fa_oi->oi_oa = body->oa;
580 rc = fa->fa_upcall(fa->fa_cookie, rc);
584 int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
585 obd_enqueue_update_f upcall, void *cookie,
586 struct ptlrpc_request_set *rqset)
588 struct ptlrpc_request *req;
589 struct ost_body *body;
590 struct osc_fsync_args *fa;
594 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
598 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
599 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
601 ptlrpc_request_free(req);
605 /* overload the size and blocks fields in the oa with start/end */
606 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
608 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
610 osc_pack_capa(req, body, oinfo->oi_capa);
612 ptlrpc_request_set_replen(req);
613 req->rq_interpret_reply = osc_sync_interpret;
615 CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
616 fa = ptlrpc_req_async_args(req);
618 fa->fa_upcall = upcall;
619 fa->fa_cookie = cookie;
621 if (rqset == PTLRPCD_SET)
622 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
624 ptlrpc_set_add_req(rqset, req);
629 /* Find and cancel locally locks matched by @mode in the resource found by
630 * @objid. Found locks are added into @cancel list. Returns the amount of
631 * locks added to @cancels list. */
632 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
633 struct list_head *cancels,
634 ldlm_mode_t mode, __u64 lock_flags)
636 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
637 struct ldlm_res_id res_id;
638 struct ldlm_resource *res;
642 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
643 * export) but disabled through procfs (flag in NS).
645 * This distinguishes from a case when ELC is not supported originally,
646 * when we still want to cancel locks in advance and just cancel them
647 * locally, without sending any RPC. */
648 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
651 ostid_build_res_name(&oa->o_oi, &res_id);
652 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
656 LDLM_RESOURCE_ADDREF(res);
657 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
658 lock_flags, 0, NULL);
659 LDLM_RESOURCE_DELREF(res);
660 ldlm_resource_putref(res);
664 static int osc_destroy_interpret(const struct lu_env *env,
665 struct ptlrpc_request *req, void *data,
668 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
670 atomic_dec(&cli->cl_destroy_in_flight);
671 wake_up(&cli->cl_destroy_waitq);
675 static int osc_can_send_destroy(struct client_obd *cli)
677 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
678 cli->cl_max_rpcs_in_flight) {
679 /* The destroy request can be sent */
682 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
683 cli->cl_max_rpcs_in_flight) {
685 * The counter has been modified between the two atomic
688 wake_up(&cli->cl_destroy_waitq);
693 int osc_create(const struct lu_env *env, struct obd_export *exp,
694 struct obdo *oa, struct lov_stripe_md **ea,
695 struct obd_trans_info *oti)
702 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
704 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
705 oa->o_flags == OBD_FL_RECREATE_OBJS) {
706 RETURN(osc_real_create(exp, oa, ea, oti));
709 if (!fid_seq_is_mdt(ostid_seq(&oa->o_oi)))
710 RETURN(osc_real_create(exp, oa, ea, oti));
712 /* we should not get here anymore */
718 /* Destroy requests can be async always on the client, and we don't even really
719 * care about the return code since the client cannot do anything at all about
721 * When the MDS is unlinking a filename, it saves the file objects into a
722 * recovery llog, and these object records are cancelled when the OST reports
723 * they were destroyed and sync'd to disk (i.e. transaction committed).
724 * If the client dies, or the OST is down when the object should be destroyed,
725 * the records are not cancelled, and when the OST reconnects to the MDS next,
726 * it will retrieve the llog unlink logs and then sends the log cancellation
727 * cookies to the MDS after committing destroy transactions. */
728 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
729 struct obdo *oa, struct lov_stripe_md *ea,
730 struct obd_trans_info *oti, struct obd_export *md_export,
733 struct client_obd *cli = &exp->exp_obd->u.cli;
734 struct ptlrpc_request *req;
735 struct ost_body *body;
736 struct list_head cancels = LIST_HEAD_INIT(cancels);
741 CDEBUG(D_INFO, "oa NULL\n");
745 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
746 LDLM_FL_DISCARD_DATA);
748 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
750 ldlm_lock_list_put(&cancels, l_bl_ast, count);
754 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
755 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
758 ptlrpc_request_free(req);
762 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
763 ptlrpc_at_set_req_timeout(req);
765 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
766 oa->o_lcookie = *oti->oti_logcookies;
767 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
769 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
771 osc_pack_capa(req, body, (struct obd_capa *)capa);
772 ptlrpc_request_set_replen(req);
774 /* If osc_destory is for destroying the unlink orphan,
775 * sent from MDT to OST, which should not be blocked here,
776 * because the process might be triggered by ptlrpcd, and
777 * it is not good to block ptlrpcd thread (b=16006)*/
778 if (!(oa->o_flags & OBD_FL_DELORPHAN)) {
779 req->rq_interpret_reply = osc_destroy_interpret;
780 if (!osc_can_send_destroy(cli)) {
781 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
785 * Wait until the number of on-going destroy RPCs drops
786 * under max_rpc_in_flight
788 l_wait_event_exclusive(cli->cl_destroy_waitq,
789 osc_can_send_destroy(cli), &lwi);
793 /* Do not wait for response */
794 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
798 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
801 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
803 LASSERT(!(oa->o_valid & bits));
806 client_obd_list_lock(&cli->cl_loi_list_lock);
807 oa->o_dirty = cli->cl_dirty_pages << PAGE_CACHE_SHIFT;
808 if (unlikely(cli->cl_dirty_pages - cli->cl_dirty_transit >
809 cli->cl_dirty_max_pages)) {
810 CERROR("dirty %lu - %lu > dirty_max %lu\n",
811 cli->cl_dirty_pages, cli->cl_dirty_transit,
812 cli->cl_dirty_max_pages);
814 } else if (unlikely(atomic_read(&obd_dirty_pages) -
815 atomic_read(&obd_dirty_transit_pages) >
816 (long)(obd_max_dirty_pages + 1))) {
817 /* The atomic_read() allowing the atomic_inc() are
818 * not covered by a lock thus they may safely race and trip
819 * this CERROR() unless we add in a small fudge factor (+1). */
820 CERROR("%s: dirty %d - %d > system dirty_max %d\n",
821 cli->cl_import->imp_obd->obd_name,
822 atomic_read(&obd_dirty_pages),
823 atomic_read(&obd_dirty_transit_pages),
824 obd_max_dirty_pages);
826 } else if (unlikely(cli->cl_dirty_max_pages - cli->cl_dirty_pages >
828 CERROR("dirty %lu - dirty_max %lu too big???\n",
829 cli->cl_dirty_pages, cli->cl_dirty_max_pages);
832 unsigned long max_in_flight = (cli->cl_max_pages_per_rpc <<
834 (cli->cl_max_rpcs_in_flight + 1);
835 oa->o_undirty = max(cli->cl_dirty_max_pages << PAGE_CACHE_SHIFT,
838 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
839 oa->o_dropped = cli->cl_lost_grant;
840 cli->cl_lost_grant = 0;
841 client_obd_list_unlock(&cli->cl_loi_list_lock);
842 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
843 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
847 void osc_update_next_shrink(struct client_obd *cli)
849 cli->cl_next_shrink_grant =
850 cfs_time_shift(cli->cl_grant_shrink_interval);
851 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
852 cli->cl_next_shrink_grant);
855 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
857 client_obd_list_lock(&cli->cl_loi_list_lock);
858 cli->cl_avail_grant += grant;
859 client_obd_list_unlock(&cli->cl_loi_list_lock);
862 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
864 if (body->oa.o_valid & OBD_MD_FLGRANT) {
865 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
866 __osc_update_grant(cli, body->oa.o_grant);
870 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
871 obd_count keylen, void *key, obd_count vallen,
872 void *val, struct ptlrpc_request_set *set);
874 static int osc_shrink_grant_interpret(const struct lu_env *env,
875 struct ptlrpc_request *req,
878 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
879 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
880 struct ost_body *body;
883 __osc_update_grant(cli, oa->o_grant);
887 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
889 osc_update_grant(cli, body);
895 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
897 client_obd_list_lock(&cli->cl_loi_list_lock);
898 oa->o_grant = cli->cl_avail_grant / 4;
899 cli->cl_avail_grant -= oa->o_grant;
900 client_obd_list_unlock(&cli->cl_loi_list_lock);
901 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
902 oa->o_valid |= OBD_MD_FLFLAGS;
905 oa->o_flags |= OBD_FL_SHRINK_GRANT;
906 osc_update_next_shrink(cli);
909 /* Shrink the current grant, either from some large amount to enough for a
910 * full set of in-flight RPCs, or if we have already shrunk to that limit
911 * then to enough for a single RPC. This avoids keeping more grant than
912 * needed, and avoids shrinking the grant piecemeal. */
913 static int osc_shrink_grant(struct client_obd *cli)
915 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
916 (cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT);
918 client_obd_list_lock(&cli->cl_loi_list_lock);
919 if (cli->cl_avail_grant <= target_bytes)
920 target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
921 client_obd_list_unlock(&cli->cl_loi_list_lock);
923 return osc_shrink_grant_to_target(cli, target_bytes);
926 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
929 struct ost_body *body;
932 client_obd_list_lock(&cli->cl_loi_list_lock);
933 /* Don't shrink if we are already above or below the desired limit
934 * We don't want to shrink below a single RPC, as that will negatively
935 * impact block allocation and long-term performance. */
936 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT)
937 target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
939 if (target_bytes >= cli->cl_avail_grant) {
940 client_obd_list_unlock(&cli->cl_loi_list_lock);
943 client_obd_list_unlock(&cli->cl_loi_list_lock);
949 osc_announce_cached(cli, &body->oa, 0);
951 client_obd_list_lock(&cli->cl_loi_list_lock);
952 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
953 cli->cl_avail_grant = target_bytes;
954 client_obd_list_unlock(&cli->cl_loi_list_lock);
955 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
956 body->oa.o_valid |= OBD_MD_FLFLAGS;
957 body->oa.o_flags = 0;
959 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
960 osc_update_next_shrink(cli);
962 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
963 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
964 sizeof(*body), body, NULL);
966 __osc_update_grant(cli, body->oa.o_grant);
971 static int osc_should_shrink_grant(struct client_obd *client)
973 cfs_time_t time = cfs_time_current();
974 cfs_time_t next_shrink = client->cl_next_shrink_grant;
976 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
977 OBD_CONNECT_GRANT_SHRINK) == 0)
980 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
981 /* Get the current RPC size directly, instead of going via:
982 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
983 * Keep comment here so that it can be found by searching. */
984 int brw_size = client->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
986 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
987 client->cl_avail_grant > brw_size)
990 osc_update_next_shrink(client);
995 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
997 struct client_obd *client;
999 list_for_each_entry(client, &item->ti_obd_list, cl_grant_shrink_list) {
1000 if (osc_should_shrink_grant(client))
1001 osc_shrink_grant(client);
1006 static int osc_add_shrink_grant(struct client_obd *client)
1010 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1012 osc_grant_shrink_grant_cb, NULL,
1013 &client->cl_grant_shrink_list);
1015 CERROR("add grant client %s error %d\n",
1016 client->cl_import->imp_obd->obd_name, rc);
1019 CDEBUG(D_CACHE, "add grant client %s \n",
1020 client->cl_import->imp_obd->obd_name);
1021 osc_update_next_shrink(client);
1025 static int osc_del_shrink_grant(struct client_obd *client)
1027 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1031 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1034 * ocd_grant is the total grant amount we're expect to hold: if we've
1035 * been evicted, it's the new avail_grant amount, cl_dirty_pages will
1036 * drop to 0 as inflight RPCs fail out; otherwise, it's avail_grant +
1039 * race is tolerable here: if we're evicted, but imp_state already
1040 * left EVICTED state, then cl_dirty_pages must be 0 already.
1042 client_obd_list_lock(&cli->cl_loi_list_lock);
1043 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1044 cli->cl_avail_grant = ocd->ocd_grant;
1046 cli->cl_avail_grant = ocd->ocd_grant -
1047 (cli->cl_dirty_pages << PAGE_CACHE_SHIFT);
1049 if (cli->cl_avail_grant < 0) {
1050 CWARN("%s: available grant < 0: avail/ocd/dirty %ld/%u/%ld\n",
1051 cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant,
1052 ocd->ocd_grant, cli->cl_dirty_pages << PAGE_CACHE_SHIFT);
1053 /* workaround for servers which do not have the patch from
1055 cli->cl_avail_grant = ocd->ocd_grant;
1058 /* determine the appropriate chunk size used by osc_extent. */
1059 cli->cl_chunkbits = max_t(int, PAGE_CACHE_SHIFT, ocd->ocd_blocksize);
1060 client_obd_list_unlock(&cli->cl_loi_list_lock);
1062 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
1063 "chunk bits: %d.\n", cli->cl_import->imp_obd->obd_name,
1064 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits);
1066 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1067 list_empty(&cli->cl_grant_shrink_list))
1068 osc_add_shrink_grant(cli);
1071 /* We assume that the reason this OSC got a short read is because it read
1072 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1073 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1074 * this stripe never got written at or beyond this stripe offset yet. */
1075 static void handle_short_read(int nob_read, obd_count page_count,
1076 struct brw_page **pga)
1081 /* skip bytes read OK */
1082 while (nob_read > 0) {
1083 LASSERT (page_count > 0);
1085 if (pga[i]->count > nob_read) {
1086 /* EOF inside this page */
1087 ptr = kmap(pga[i]->pg) +
1088 (pga[i]->off & ~CFS_PAGE_MASK);
1089 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1096 nob_read -= pga[i]->count;
1101 /* zero remaining pages */
1102 while (page_count-- > 0) {
1103 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1104 memset(ptr, 0, pga[i]->count);
1110 static int check_write_rcs(struct ptlrpc_request *req,
1111 int requested_nob, int niocount,
1112 obd_count page_count, struct brw_page **pga)
1117 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1118 sizeof(*remote_rcs) *
1120 if (remote_rcs == NULL) {
1121 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1125 /* return error if any niobuf was in error */
1126 for (i = 0; i < niocount; i++) {
1127 if ((int)remote_rcs[i] < 0)
1128 return(remote_rcs[i]);
1130 if (remote_rcs[i] != 0) {
1131 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1132 i, remote_rcs[i], req);
1137 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1138 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1139 req->rq_bulk->bd_nob_transferred, requested_nob);
1146 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1148 if (p1->flag != p2->flag) {
1149 unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
1150 OBD_BRW_SYNC | OBD_BRW_ASYNC |
1151 OBD_BRW_NOQUOTA | OBD_BRW_SOFT_SYNC);
1153 /* warn if we try to combine flags that we don't know to be
1154 * safe to combine */
1155 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1156 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1157 "report this at https://jira.hpdd.intel.com/\n",
1158 p1->flag, p2->flag);
1163 return (p1->off + p1->count == p2->off);
1166 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1167 struct brw_page **pga, int opc,
1168 cksum_type_t cksum_type)
1172 struct cfs_crypto_hash_desc *hdesc;
1173 unsigned int bufsize;
1175 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1177 LASSERT(pg_count > 0);
1179 hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1180 if (IS_ERR(hdesc)) {
1181 CERROR("Unable to initialize checksum hash %s\n",
1182 cfs_crypto_hash_name(cfs_alg));
1183 return PTR_ERR(hdesc);
1186 while (nob > 0 && pg_count > 0) {
1187 int count = pga[i]->count > nob ? nob : pga[i]->count;
1189 /* corrupt the data before we compute the checksum, to
1190 * simulate an OST->client data error */
1191 if (i == 0 && opc == OST_READ &&
1192 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1193 unsigned char *ptr = kmap(pga[i]->pg);
1194 int off = pga[i]->off & ~CFS_PAGE_MASK;
1196 memcpy(ptr + off, "bad1", min(4, nob));
1199 cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
1200 pga[i]->off & ~CFS_PAGE_MASK,
1202 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
1203 (int)(pga[i]->off & ~CFS_PAGE_MASK));
1205 nob -= pga[i]->count;
1210 bufsize = sizeof(cksum);
1211 err = cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
1213 /* For sending we only compute the wrong checksum instead
1214 * of corrupting the data so it is still correct on a redo */
1215 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1221 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1222 struct lov_stripe_md *lsm, obd_count page_count,
1223 struct brw_page **pga,
1224 struct ptlrpc_request **reqp,
1225 struct obd_capa *ocapa, int reserve,
1228 struct ptlrpc_request *req;
1229 struct ptlrpc_bulk_desc *desc;
1230 struct ost_body *body;
1231 struct obd_ioobj *ioobj;
1232 struct niobuf_remote *niobuf;
1233 int niocount, i, requested_nob, opc, rc;
1234 struct osc_brw_async_args *aa;
1235 struct req_capsule *pill;
1236 struct brw_page *pg_prev;
1239 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1240 RETURN(-ENOMEM); /* Recoverable */
1241 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1242 RETURN(-EINVAL); /* Fatal */
1244 if ((cmd & OBD_BRW_WRITE) != 0) {
1246 req = ptlrpc_request_alloc_pool(cli->cl_import,
1247 cli->cl_import->imp_rq_pool,
1248 &RQF_OST_BRW_WRITE);
1251 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1256 for (niocount = i = 1; i < page_count; i++) {
1257 if (!can_merge_pages(pga[i - 1], pga[i]))
1261 pill = &req->rq_pill;
1262 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1264 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1265 niocount * sizeof(*niobuf));
1266 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1268 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1270 ptlrpc_request_free(req);
1273 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1274 ptlrpc_at_set_req_timeout(req);
1275 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1277 req->rq_no_retry_einprogress = 1;
1279 desc = ptlrpc_prep_bulk_imp(req, page_count,
1280 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1281 opc == OST_WRITE ? BULK_GET_SOURCE : BULK_PUT_SINK,
1285 GOTO(out, rc = -ENOMEM);
1286 /* NB request now owns desc and will free it when it gets freed */
1288 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1289 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1290 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1291 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1293 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1295 obdo_to_ioobj(oa, ioobj);
1296 ioobj->ioo_bufcnt = niocount;
1297 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1298 * that might be send for this request. The actual number is decided
1299 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1300 * "max - 1" for old client compatibility sending "0", and also so the
1301 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1302 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1303 osc_pack_capa(req, body, ocapa);
1304 LASSERT(page_count > 0);
1306 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1307 struct brw_page *pg = pga[i];
1308 int poff = pg->off & ~CFS_PAGE_MASK;
1310 LASSERT(pg->count > 0);
1311 /* make sure there is no gap in the middle of page array */
1312 LASSERTF(page_count == 1 ||
1313 (ergo(i == 0, poff + pg->count == PAGE_CACHE_SIZE) &&
1314 ergo(i > 0 && i < page_count - 1,
1315 poff == 0 && pg->count == PAGE_CACHE_SIZE) &&
1316 ergo(i == page_count - 1, poff == 0)),
1317 "i: %d/%d pg: %p off: "LPU64", count: %u\n",
1318 i, page_count, pg, pg->off, pg->count);
1319 LASSERTF(i == 0 || pg->off > pg_prev->off,
1320 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1321 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1323 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1324 pg_prev->pg, page_private(pg_prev->pg),
1325 pg_prev->pg->index, pg_prev->off);
1326 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1327 (pg->flag & OBD_BRW_SRVLOCK));
1329 ptlrpc_prep_bulk_page_pin(desc, pg->pg, poff, pg->count);
1330 requested_nob += pg->count;
1332 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1334 niobuf->rnb_len += pg->count;
1336 niobuf->rnb_offset = pg->off;
1337 niobuf->rnb_len = pg->count;
1338 niobuf->rnb_flags = pg->flag;
1343 LASSERTF((void *)(niobuf - niocount) ==
1344 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1345 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1346 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1348 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1350 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1351 body->oa.o_valid |= OBD_MD_FLFLAGS;
1352 body->oa.o_flags = 0;
1354 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1357 if (osc_should_shrink_grant(cli))
1358 osc_shrink_grant_local(cli, &body->oa);
1360 /* size[REQ_REC_OFF] still sizeof (*body) */
1361 if (opc == OST_WRITE) {
1362 if (cli->cl_checksum &&
1363 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1364 /* store cl_cksum_type in a local variable since
1365 * it can be changed via lprocfs */
1366 cksum_type_t cksum_type = cli->cl_cksum_type;
1368 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1369 oa->o_flags &= OBD_FL_LOCAL_MASK;
1370 body->oa.o_flags = 0;
1372 body->oa.o_flags |= cksum_type_pack(cksum_type);
1373 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1374 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1378 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1380 /* save this in 'oa', too, for later checking */
1381 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1382 oa->o_flags |= cksum_type_pack(cksum_type);
1384 /* clear out the checksum flag, in case this is a
1385 * resend but cl_checksum is no longer set. b=11238 */
1386 oa->o_valid &= ~OBD_MD_FLCKSUM;
1388 oa->o_cksum = body->oa.o_cksum;
1389 /* 1 RC per niobuf */
1390 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1391 sizeof(__u32) * niocount);
1393 if (cli->cl_checksum &&
1394 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1395 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1396 body->oa.o_flags = 0;
1397 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1398 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1401 ptlrpc_request_set_replen(req);
1403 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1404 aa = ptlrpc_req_async_args(req);
1406 aa->aa_requested_nob = requested_nob;
1407 aa->aa_nio_count = niocount;
1408 aa->aa_page_count = page_count;
1412 INIT_LIST_HEAD(&aa->aa_oaps);
1413 if (ocapa && reserve)
1414 aa->aa_ocapa = capa_get(ocapa);
1420 ptlrpc_req_finished(req);
1424 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1425 __u32 client_cksum, __u32 server_cksum, int nob,
1426 obd_count page_count, struct brw_page **pga,
1427 cksum_type_t client_cksum_type)
1431 cksum_type_t cksum_type;
1433 if (server_cksum == client_cksum) {
1434 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1438 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1440 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1443 if (cksum_type != client_cksum_type)
1444 msg = "the server did not use the checksum type specified in "
1445 "the original request - likely a protocol problem";
1446 else if (new_cksum == server_cksum)
1447 msg = "changed on the client after we checksummed it - "
1448 "likely false positive due to mmap IO (bug 11742)";
1449 else if (new_cksum == client_cksum)
1450 msg = "changed in transit before arrival at OST";
1452 msg = "changed in transit AND doesn't match the original - "
1453 "likely false positive due to mmap IO (bug 11742)";
1455 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1456 " object "DOSTID" extent ["LPU64"-"LPU64"]\n",
1457 msg, libcfs_nid2str(peer->nid),
1458 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1459 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1460 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1461 POSTID(&oa->o_oi), pga[0]->off,
1462 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1463 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1464 "client csum now %x\n", client_cksum, client_cksum_type,
1465 server_cksum, cksum_type, new_cksum);
1469 /* Note rc enters this function as number of bytes transferred */
1470 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1472 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1473 const lnet_process_id_t *peer =
1474 &req->rq_import->imp_connection->c_peer;
1475 struct client_obd *cli = aa->aa_cli;
1476 struct ost_body *body;
1477 __u32 client_cksum = 0;
1480 if (rc < 0 && rc != -EDQUOT) {
1481 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1485 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1486 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1488 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1492 /* set/clear over quota flag for a uid/gid */
1493 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1494 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1495 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1497 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid "LPX64", flags %x\n",
1498 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1500 osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
1503 osc_update_grant(cli, body);
1508 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1509 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1511 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1513 CERROR("Unexpected +ve rc %d\n", rc);
1516 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1518 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1521 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1522 check_write_checksum(&body->oa, peer, client_cksum,
1523 body->oa.o_cksum, aa->aa_requested_nob,
1524 aa->aa_page_count, aa->aa_ppga,
1525 cksum_type_unpack(aa->aa_oa->o_flags)))
1528 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1529 aa->aa_page_count, aa->aa_ppga);
1533 /* The rest of this function executes only for OST_READs */
1535 /* if unwrap_bulk failed, return -EAGAIN to retry */
1536 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1538 GOTO(out, rc = -EAGAIN);
1540 if (rc > aa->aa_requested_nob) {
1541 CERROR("Unexpected rc %d (%d requested)\n", rc,
1542 aa->aa_requested_nob);
1546 if (rc != req->rq_bulk->bd_nob_transferred) {
1547 CERROR ("Unexpected rc %d (%d transferred)\n",
1548 rc, req->rq_bulk->bd_nob_transferred);
1552 if (rc < aa->aa_requested_nob)
1553 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1555 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1556 static int cksum_counter;
1557 __u32 server_cksum = body->oa.o_cksum;
1560 cksum_type_t cksum_type;
1562 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1563 body->oa.o_flags : 0);
1564 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1565 aa->aa_ppga, OST_READ,
1568 if (peer->nid == req->rq_bulk->bd_sender) {
1572 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1575 if (server_cksum != client_cksum) {
1576 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1577 "%s%s%s inode "DFID" object "DOSTID
1578 " extent ["LPU64"-"LPU64"]\n",
1579 req->rq_import->imp_obd->obd_name,
1580 libcfs_nid2str(peer->nid),
1582 body->oa.o_valid & OBD_MD_FLFID ?
1583 body->oa.o_parent_seq : (__u64)0,
1584 body->oa.o_valid & OBD_MD_FLFID ?
1585 body->oa.o_parent_oid : 0,
1586 body->oa.o_valid & OBD_MD_FLFID ?
1587 body->oa.o_parent_ver : 0,
1588 POSTID(&body->oa.o_oi),
1589 aa->aa_ppga[0]->off,
1590 aa->aa_ppga[aa->aa_page_count-1]->off +
1591 aa->aa_ppga[aa->aa_page_count-1]->count -
1593 CERROR("client %x, server %x, cksum_type %x\n",
1594 client_cksum, server_cksum, cksum_type);
1596 aa->aa_oa->o_cksum = client_cksum;
1600 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1603 } else if (unlikely(client_cksum)) {
1604 static int cksum_missed;
1607 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1608 CERROR("Checksum %u requested from %s but not sent\n",
1609 cksum_missed, libcfs_nid2str(peer->nid));
1615 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1616 aa->aa_oa, &body->oa);
1621 static int osc_brw_redo_request(struct ptlrpc_request *request,
1622 struct osc_brw_async_args *aa, int rc)
1624 struct ptlrpc_request *new_req;
1625 struct osc_brw_async_args *new_aa;
1626 struct osc_async_page *oap;
1629 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1630 "redo for recoverable error %d", rc);
1632 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1633 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1634 aa->aa_cli, aa->aa_oa,
1635 NULL /* lsm unused by osc currently */,
1636 aa->aa_page_count, aa->aa_ppga,
1637 &new_req, aa->aa_ocapa, 0, 1);
1641 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1642 if (oap->oap_request != NULL) {
1643 LASSERTF(request == oap->oap_request,
1644 "request %p != oap_request %p\n",
1645 request, oap->oap_request);
1646 if (oap->oap_interrupted) {
1647 ptlrpc_req_finished(new_req);
1652 /* New request takes over pga and oaps from old request.
1653 * Note that copying a list_head doesn't work, need to move it... */
1655 new_req->rq_interpret_reply = request->rq_interpret_reply;
1656 new_req->rq_async_args = request->rq_async_args;
1657 new_req->rq_commit_cb = request->rq_commit_cb;
1658 /* cap resend delay to the current request timeout, this is similar to
1659 * what ptlrpc does (see after_reply()) */
1660 if (aa->aa_resends > new_req->rq_timeout)
1661 new_req->rq_sent = cfs_time_current_sec() + new_req->rq_timeout;
1663 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1664 new_req->rq_generation_set = 1;
1665 new_req->rq_import_generation = request->rq_import_generation;
1667 new_aa = ptlrpc_req_async_args(new_req);
1669 INIT_LIST_HEAD(&new_aa->aa_oaps);
1670 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1671 INIT_LIST_HEAD(&new_aa->aa_exts);
1672 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1673 new_aa->aa_resends = aa->aa_resends;
1675 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1676 if (oap->oap_request) {
1677 ptlrpc_req_finished(oap->oap_request);
1678 oap->oap_request = ptlrpc_request_addref(new_req);
1682 new_aa->aa_ocapa = aa->aa_ocapa;
1683 aa->aa_ocapa = NULL;
1685 /* XXX: This code will run into problem if we're going to support
1686 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1687 * and wait for all of them to be finished. We should inherit request
1688 * set from old request. */
1689 ptlrpcd_add_req(new_req, PDL_POLICY_SAME, -1);
1691 DEBUG_REQ(D_INFO, new_req, "new request");
1696 * ugh, we want disk allocation on the target to happen in offset order. we'll
1697 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1698 * fine for our small page arrays and doesn't require allocation. its an
1699 * insertion sort that swaps elements that are strides apart, shrinking the
1700 * stride down until its '1' and the array is sorted.
1702 static void sort_brw_pages(struct brw_page **array, int num)
1705 struct brw_page *tmp;
1709 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1714 for (i = stride ; i < num ; i++) {
1717 while (j >= stride && array[j - stride]->off > tmp->off) {
1718 array[j] = array[j - stride];
1723 } while (stride > 1);
1726 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1728 LASSERT(ppga != NULL);
1729 OBD_FREE(ppga, sizeof(*ppga) * count);
1732 static int brw_interpret(const struct lu_env *env,
1733 struct ptlrpc_request *req, void *data, int rc)
1735 struct osc_brw_async_args *aa = data;
1736 struct osc_extent *ext;
1737 struct osc_extent *tmp;
1738 struct client_obd *cli = aa->aa_cli;
1741 rc = osc_brw_fini_request(req, rc);
1742 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1743 /* When server return -EINPROGRESS, client should always retry
1744 * regardless of the number of times the bulk was resent already. */
1745 if (osc_recoverable_error(rc)) {
1746 if (req->rq_import_generation !=
1747 req->rq_import->imp_generation) {
1748 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1749 ""DOSTID", rc = %d.\n",
1750 req->rq_import->imp_obd->obd_name,
1751 POSTID(&aa->aa_oa->o_oi), rc);
1752 } else if (rc == -EINPROGRESS ||
1753 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1754 rc = osc_brw_redo_request(req, aa, rc);
1756 CERROR("%s: too many resent retries for object: "
1757 ""LPU64":"LPU64", rc = %d.\n",
1758 req->rq_import->imp_obd->obd_name,
1759 POSTID(&aa->aa_oa->o_oi), rc);
1764 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1769 capa_put(aa->aa_ocapa);
1770 aa->aa_ocapa = NULL;
1774 struct obdo *oa = aa->aa_oa;
1775 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1776 unsigned long valid = 0;
1777 struct cl_object *obj;
1778 struct osc_async_page *last;
1780 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
1781 obj = osc2cl(last->oap_obj);
1783 cl_object_attr_lock(obj);
1784 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1785 attr->cat_blocks = oa->o_blocks;
1786 valid |= CAT_BLOCKS;
1788 if (oa->o_valid & OBD_MD_FLMTIME) {
1789 attr->cat_mtime = oa->o_mtime;
1792 if (oa->o_valid & OBD_MD_FLATIME) {
1793 attr->cat_atime = oa->o_atime;
1796 if (oa->o_valid & OBD_MD_FLCTIME) {
1797 attr->cat_ctime = oa->o_ctime;
1801 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1802 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
1803 loff_t last_off = last->oap_count + last->oap_obj_off +
1806 /* Change file size if this is an out of quota or
1807 * direct IO write and it extends the file size */
1808 if (loi->loi_lvb.lvb_size < last_off) {
1809 attr->cat_size = last_off;
1812 /* Extend KMS if it's not a lockless write */
1813 if (loi->loi_kms < last_off &&
1814 oap2osc_page(last)->ops_srvlock == 0) {
1815 attr->cat_kms = last_off;
1821 cl_object_attr_set(env, obj, attr, valid);
1822 cl_object_attr_unlock(obj);
1824 OBDO_FREE(aa->aa_oa);
1826 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
1827 osc_inc_unstable_pages(req);
1829 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1830 list_del_init(&ext->oe_link);
1831 osc_extent_finish(env, ext, 1, rc);
1833 LASSERT(list_empty(&aa->aa_exts));
1834 LASSERT(list_empty(&aa->aa_oaps));
1836 cl_req_completion(env, aa->aa_clerq, rc < 0 ? rc :
1837 req->rq_bulk->bd_nob_transferred);
1838 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1839 ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
1841 client_obd_list_lock(&cli->cl_loi_list_lock);
1842 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1843 * is called so we know whether to go to sync BRWs or wait for more
1844 * RPCs to complete */
1845 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1846 cli->cl_w_in_flight--;
1848 cli->cl_r_in_flight--;
1849 osc_wake_cache_waiters(cli);
1850 client_obd_list_unlock(&cli->cl_loi_list_lock);
1852 osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
1856 static void brw_commit(struct ptlrpc_request *req)
1858 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
1859 * this called via the rq_commit_cb, I need to ensure
1860 * osc_dec_unstable_pages is still called. Otherwise unstable
1861 * pages may be leaked. */
1862 spin_lock(&req->rq_lock);
1863 if (likely(req->rq_unstable)) {
1864 req->rq_unstable = 0;
1865 spin_unlock(&req->rq_lock);
1867 osc_dec_unstable_pages(req);
1869 req->rq_committed = 1;
1870 spin_unlock(&req->rq_lock);
1875 * Build an RPC by the list of extent @ext_list. The caller must ensure
1876 * that the total pages in this list are NOT over max pages per RPC.
1877 * Extents in the list must be in OES_RPC state.
1879 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
1880 struct list_head *ext_list, int cmd, pdl_policy_t pol)
1882 struct ptlrpc_request *req = NULL;
1883 struct osc_extent *ext;
1884 struct brw_page **pga = NULL;
1885 struct osc_brw_async_args *aa = NULL;
1886 struct obdo *oa = NULL;
1887 struct osc_async_page *oap;
1888 struct osc_async_page *tmp;
1889 struct cl_req *clerq = NULL;
1890 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE :
1892 struct cl_req_attr *crattr = NULL;
1893 obd_off starting_offset = OBD_OBJECT_EOF;
1894 obd_off ending_offset = 0;
1898 bool soft_sync = false;
1901 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1904 LASSERT(!list_empty(ext_list));
1906 /* add pages into rpc_list to build BRW rpc */
1907 list_for_each_entry(ext, ext_list, oe_link) {
1908 LASSERT(ext->oe_state == OES_RPC);
1909 mem_tight |= ext->oe_memalloc;
1910 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
1912 list_add_tail(&oap->oap_rpc_item, &rpc_list);
1913 if (starting_offset > oap->oap_obj_off)
1914 starting_offset = oap->oap_obj_off;
1916 LASSERT(oap->oap_page_off == 0);
1917 if (ending_offset < oap->oap_obj_off + oap->oap_count)
1918 ending_offset = oap->oap_obj_off +
1921 LASSERT(oap->oap_page_off + oap->oap_count ==
1926 soft_sync = osc_over_unstable_soft_limit(cli);
1928 mpflag = cfs_memory_pressure_get_and_set();
1930 OBD_ALLOC(crattr, sizeof(*crattr));
1932 GOTO(out, rc = -ENOMEM);
1934 OBD_ALLOC(pga, sizeof(*pga) * page_count);
1936 GOTO(out, rc = -ENOMEM);
1940 GOTO(out, rc = -ENOMEM);
1943 list_for_each_entry(oap, &rpc_list, oap_rpc_item) {
1944 struct cl_page *page = oap2cl_page(oap);
1945 if (clerq == NULL) {
1946 clerq = cl_req_alloc(env, page, crt,
1947 1 /* only 1-object rpcs for now */);
1949 GOTO(out, rc = PTR_ERR(clerq));
1952 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
1954 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
1955 pga[i] = &oap->oap_brw_page;
1956 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
1957 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
1958 pga[i]->pg, page_index(oap->oap_page), oap,
1961 cl_req_page_add(env, clerq, page);
1964 /* always get the data for the obdo for the rpc */
1965 LASSERT(clerq != NULL);
1966 crattr->cra_oa = oa;
1967 cl_req_attr_set(env, clerq, crattr, ~0ULL);
1969 rc = cl_req_prep(env, clerq);
1971 CERROR("cl_req_prep failed: %d\n", rc);
1975 sort_brw_pages(pga, page_count);
1976 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
1977 pga, &req, crattr->cra_capa, 1, 0);
1979 CERROR("prep_req failed: %d\n", rc);
1983 req->rq_commit_cb = brw_commit;
1984 req->rq_interpret_reply = brw_interpret;
1987 req->rq_memalloc = 1;
1989 /* Need to update the timestamps after the request is built in case
1990 * we race with setattr (locally or in queue at OST). If OST gets
1991 * later setattr before earlier BRW (as determined by the request xid),
1992 * the OST will not use BRW timestamps. Sadly, there is no obvious
1993 * way to do this in a single call. bug 10150 */
1994 cl_req_attr_set(env, clerq, crattr,
1995 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
1997 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
1999 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2000 aa = ptlrpc_req_async_args(req);
2001 INIT_LIST_HEAD(&aa->aa_oaps);
2002 list_splice_init(&rpc_list, &aa->aa_oaps);
2003 INIT_LIST_HEAD(&aa->aa_exts);
2004 list_splice_init(ext_list, &aa->aa_exts);
2005 aa->aa_clerq = clerq;
2007 /* queued sync pages can be torn down while the pages
2008 * were between the pending list and the rpc */
2010 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2011 /* only one oap gets a request reference */
2014 if (oap->oap_interrupted && !req->rq_intr) {
2015 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2017 ptlrpc_mark_interrupted(req);
2021 tmp->oap_request = ptlrpc_request_addref(req);
2023 client_obd_list_lock(&cli->cl_loi_list_lock);
2024 starting_offset >>= PAGE_CACHE_SHIFT;
2025 if (cmd == OBD_BRW_READ) {
2026 cli->cl_r_in_flight++;
2027 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2028 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2029 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2030 starting_offset + 1);
2032 cli->cl_w_in_flight++;
2033 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2034 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2035 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2036 starting_offset + 1);
2038 client_obd_list_unlock(&cli->cl_loi_list_lock);
2040 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
2041 page_count, aa, cli->cl_r_in_flight,
2042 cli->cl_w_in_flight);
2044 /* XXX: Maybe the caller can check the RPC bulk descriptor to
2045 * see which CPU/NUMA node the majority of pages were allocated
2046 * on, and try to assign the async RPC to the CPU core
2047 * (PDL_POLICY_PREFERRED) to reduce cross-CPU memory traffic.
2049 * But on the other hand, we expect that multiple ptlrpcd
2050 * threads and the initial write sponsor can run in parallel,
2051 * especially when data checksum is enabled, which is CPU-bound
2052 * operation and single ptlrpcd thread cannot process in time.
2053 * So more ptlrpcd threads sharing BRW load
2054 * (with PDL_POLICY_ROUND) seems better.
2056 ptlrpcd_add_req(req, pol, -1);
2062 cfs_memory_pressure_restore(mpflag);
2064 if (crattr != NULL) {
2065 capa_put(crattr->cra_capa);
2066 OBD_FREE(crattr, sizeof(*crattr));
2070 LASSERT(req == NULL);
2075 OBD_FREE(pga, sizeof(*pga) * page_count);
2076 /* this should happen rarely and is pretty bad, it makes the
2077 * pending list not follow the dirty order */
2078 while (!list_empty(ext_list)) {
2079 ext = list_entry(ext_list->next, struct osc_extent,
2081 list_del_init(&ext->oe_link);
2082 osc_extent_finish(env, ext, 0, rc);
2084 if (clerq && !IS_ERR(clerq))
2085 cl_req_completion(env, clerq, rc);
2090 static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
2091 struct ldlm_enqueue_info *einfo)
2093 void *data = einfo->ei_cbdata;
2096 LASSERT(lock != NULL);
2097 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
2098 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
2099 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
2100 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
2102 lock_res_and_lock(lock);
2103 spin_lock(&osc_ast_guard);
2105 if (lock->l_ast_data == NULL)
2106 lock->l_ast_data = data;
2107 if (lock->l_ast_data == data)
2110 spin_unlock(&osc_ast_guard);
2111 unlock_res_and_lock(lock);
2116 static int osc_set_data_with_check(struct lustre_handle *lockh,
2117 struct ldlm_enqueue_info *einfo)
2119 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2123 set = osc_set_lock_data_with_check(lock, einfo);
2124 LDLM_LOCK_PUT(lock);
2126 CERROR("lockh %p, data %p - client evicted?\n",
2127 lockh, einfo->ei_cbdata);
2131 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2132 ldlm_iterator_t replace, void *data)
2134 struct ldlm_res_id res_id;
2135 struct obd_device *obd = class_exp2obd(exp);
2137 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2138 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2142 /* find any ldlm lock of the inode in osc
2146 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2147 ldlm_iterator_t replace, void *data)
2149 struct ldlm_res_id res_id;
2150 struct obd_device *obd = class_exp2obd(exp);
2153 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2154 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2155 if (rc == LDLM_ITER_STOP)
2157 if (rc == LDLM_ITER_CONTINUE)
2162 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
2163 obd_enqueue_update_f upcall, void *cookie,
2164 __u64 *flags, int agl, int rc)
2166 int intent = *flags & LDLM_FL_HAS_INTENT;
2170 /* The request was created before ldlm_cli_enqueue call. */
2171 if (rc == ELDLM_LOCK_ABORTED) {
2172 struct ldlm_reply *rep;
2173 rep = req_capsule_server_get(&req->rq_pill,
2176 LASSERT(rep != NULL);
2177 rep->lock_policy_res1 =
2178 ptlrpc_status_ntoh(rep->lock_policy_res1);
2179 if (rep->lock_policy_res1)
2180 rc = rep->lock_policy_res1;
2184 if ((intent != 0 && rc == ELDLM_LOCK_ABORTED && agl == 0) ||
2186 *flags |= LDLM_FL_LVB_READY;
2187 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
2188 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
2191 /* Call the update callback. */
2192 rc = (*upcall)(cookie, rc);
2196 static int osc_enqueue_interpret(const struct lu_env *env,
2197 struct ptlrpc_request *req,
2198 struct osc_enqueue_args *aa, int rc)
2200 struct ldlm_lock *lock;
2201 struct lustre_handle handle;
2203 struct ost_lvb *lvb;
2205 __u64 *flags = aa->oa_flags;
2207 /* Make a local copy of a lock handle and a mode, because aa->oa_*
2208 * might be freed anytime after lock upcall has been called. */
2209 lustre_handle_copy(&handle, aa->oa_lockh);
2210 mode = aa->oa_ei->ei_mode;
2212 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2214 lock = ldlm_handle2lock(&handle);
2216 /* Take an additional reference so that a blocking AST that
2217 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2218 * to arrive after an upcall has been executed by
2219 * osc_enqueue_fini(). */
2220 ldlm_lock_addref(&handle, mode);
2222 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2223 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2225 /* Let CP AST to grant the lock first. */
2226 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2228 if (aa->oa_agl && rc == ELDLM_LOCK_ABORTED) {
2233 lvb_len = sizeof(*aa->oa_lvb);
2236 /* Complete obtaining the lock procedure. */
2237 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
2238 mode, flags, lvb, lvb_len, &handle, rc);
2239 /* Complete osc stuff. */
2240 rc = osc_enqueue_fini(req, aa->oa_lvb, aa->oa_upcall, aa->oa_cookie,
2241 flags, aa->oa_agl, rc);
2243 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2245 /* Release the lock for async request. */
2246 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
2248 * Releases a reference taken by ldlm_cli_enqueue(), if it is
2249 * not already released by
2250 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
2252 ldlm_lock_decref(&handle, mode);
2254 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
2255 aa->oa_lockh, req, aa);
2256 ldlm_lock_decref(&handle, mode);
2257 LDLM_LOCK_PUT(lock);
2261 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2263 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2264 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2265 * other synchronous requests, however keeping some locks and trying to obtain
2266 * others may take a considerable amount of time in a case of ost failure; and
2267 * when other sync requests do not get released lock from a client, the client
2268 * is excluded from the cluster -- such scenarious make the life difficult, so
2269 * release locks just after they are obtained. */
2270 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2271 __u64 *flags, ldlm_policy_data_t *policy,
2272 struct ost_lvb *lvb, int kms_valid,
2273 obd_enqueue_update_f upcall, void *cookie,
2274 struct ldlm_enqueue_info *einfo,
2275 struct lustre_handle *lockh,
2276 struct ptlrpc_request_set *rqset, int async, int agl)
2278 struct obd_device *obd = exp->exp_obd;
2279 struct ptlrpc_request *req = NULL;
2280 int intent = *flags & LDLM_FL_HAS_INTENT;
2281 __u64 match_lvb = (agl != 0 ? 0 : LDLM_FL_LVB_READY);
2286 /* Filesystem lock extents are extended to page boundaries so that
2287 * dealing with the page cache is a little smoother. */
2288 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
2289 policy->l_extent.end |= ~CFS_PAGE_MASK;
2292 * kms is not valid when either object is completely fresh (so that no
2293 * locks are cached), or object was evicted. In the latter case cached
2294 * lock cannot be used, because it would prime inode state with
2295 * potentially stale LVB.
2300 /* Next, search for already existing extent locks that will cover us */
2301 /* If we're trying to read, we also search for an existing PW lock. The
2302 * VFS and page cache already protect us locally, so lots of readers/
2303 * writers can share a single PW lock.
2305 * There are problems with conversion deadlocks, so instead of
2306 * converting a read lock to a write lock, we'll just enqueue a new
2309 * At some point we should cancel the read lock instead of making them
2310 * send us a blocking callback, but there are problems with canceling
2311 * locks out from other users right now, too. */
2312 mode = einfo->ei_mode;
2313 if (einfo->ei_mode == LCK_PR)
2315 mode = ldlm_lock_match(obd->obd_namespace, *flags | match_lvb, res_id,
2316 einfo->ei_type, policy, mode, lockh, 0);
2318 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
2320 if ((agl != 0) && !ldlm_is_lvb_ready(matched)) {
2321 /* For AGL, if enqueue RPC is sent but the lock is not
2322 * granted, then skip to process this strpe.
2323 * Return -ECANCELED to tell the caller. */
2324 ldlm_lock_decref(lockh, mode);
2325 LDLM_LOCK_PUT(matched);
2327 } else if (osc_set_lock_data_with_check(matched, einfo)) {
2328 *flags |= LDLM_FL_LVB_READY;
2329 /* addref the lock only if not async requests and PW
2330 * lock is matched whereas we asked for PR. */
2331 if (!rqset && einfo->ei_mode != mode)
2332 ldlm_lock_addref(lockh, LCK_PR);
2334 /* I would like to be able to ASSERT here that
2335 * rss <= kms, but I can't, for reasons which
2336 * are explained in lov_enqueue() */
2339 /* We already have a lock, and it's referenced.
2341 * At this point, the cl_lock::cll_state is CLS_QUEUING,
2342 * AGL upcall may change it to CLS_HELD directly. */
2343 (*upcall)(cookie, ELDLM_OK);
2345 if (einfo->ei_mode != mode)
2346 ldlm_lock_decref(lockh, LCK_PW);
2348 /* For async requests, decref the lock. */
2349 ldlm_lock_decref(lockh, einfo->ei_mode);
2350 LDLM_LOCK_PUT(matched);
2353 ldlm_lock_decref(lockh, mode);
2354 LDLM_LOCK_PUT(matched);
2360 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2361 &RQF_LDLM_ENQUEUE_LVB);
2365 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_ENQUEUE);
2367 ptlrpc_request_free(req);
2371 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2373 ptlrpc_request_set_replen(req);
2376 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2377 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2379 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2380 sizeof(*lvb), LVB_T_OST, lockh, async);
2383 struct osc_enqueue_args *aa;
2384 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2385 aa = ptlrpc_req_async_args(req);
2388 aa->oa_flags = flags;
2389 aa->oa_upcall = upcall;
2390 aa->oa_cookie = cookie;
2392 aa->oa_lockh = lockh;
2395 req->rq_interpret_reply =
2396 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2397 if (rqset == PTLRPCD_SET)
2398 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
2400 ptlrpc_set_add_req(rqset, req);
2401 } else if (intent) {
2402 ptlrpc_req_finished(req);
2407 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, agl, rc);
2409 ptlrpc_req_finished(req);
2414 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2415 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
2416 __u64 *flags, void *data, struct lustre_handle *lockh,
2419 struct obd_device *obd = exp->exp_obd;
2420 __u64 lflags = *flags;
2424 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2427 /* Filesystem lock extents are extended to page boundaries so that
2428 * dealing with the page cache is a little smoother */
2429 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
2430 policy->l_extent.end |= ~CFS_PAGE_MASK;
2432 /* Next, search for already existing extent locks that will cover us */
2433 /* If we're trying to read, we also search for an existing PW lock. The
2434 * VFS and page cache already protect us locally, so lots of readers/
2435 * writers can share a single PW lock. */
2439 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2440 res_id, type, policy, rc, lockh, unref);
2443 if (!osc_set_data_with_check(lockh, data)) {
2444 if (!(lflags & LDLM_FL_TEST_LOCK))
2445 ldlm_lock_decref(lockh, rc);
2449 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
2450 ldlm_lock_addref(lockh, LCK_PR);
2451 ldlm_lock_decref(lockh, LCK_PW);
2458 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
2462 if (unlikely(mode == LCK_GROUP))
2463 ldlm_lock_decref_and_cancel(lockh, mode);
2465 ldlm_lock_decref(lockh, mode);
2470 static int osc_statfs_interpret(const struct lu_env *env,
2471 struct ptlrpc_request *req,
2472 struct osc_async_args *aa, int rc)
2474 struct obd_statfs *msfs;
2478 /* The request has in fact never been sent
2479 * due to issues at a higher level (LOV).
2480 * Exit immediately since the caller is
2481 * aware of the problem and takes care
2482 * of the clean up */
2485 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2486 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2492 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2494 GOTO(out, rc = -EPROTO);
2497 *aa->aa_oi->oi_osfs = *msfs;
2499 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2503 static int osc_statfs_async(struct obd_export *exp,
2504 struct obd_info *oinfo, __u64 max_age,
2505 struct ptlrpc_request_set *rqset)
2507 struct obd_device *obd = class_exp2obd(exp);
2508 struct ptlrpc_request *req;
2509 struct osc_async_args *aa;
2513 /* We could possibly pass max_age in the request (as an absolute
2514 * timestamp or a "seconds.usec ago") so the target can avoid doing
2515 * extra calls into the filesystem if that isn't necessary (e.g.
2516 * during mount that would help a bit). Having relative timestamps
2517 * is not so great if request processing is slow, while absolute
2518 * timestamps are not ideal because they need time synchronization. */
2519 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2523 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2525 ptlrpc_request_free(req);
2528 ptlrpc_request_set_replen(req);
2529 req->rq_request_portal = OST_CREATE_PORTAL;
2530 ptlrpc_at_set_req_timeout(req);
2532 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2533 /* procfs requests not want stat in wait for avoid deadlock */
2534 req->rq_no_resend = 1;
2535 req->rq_no_delay = 1;
2538 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2539 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2540 aa = ptlrpc_req_async_args(req);
2543 ptlrpc_set_add_req(rqset, req);
2547 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2548 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
2550 struct obd_device *obd = class_exp2obd(exp);
2551 struct obd_statfs *msfs;
2552 struct ptlrpc_request *req;
2553 struct obd_import *imp = NULL;
2557 /*Since the request might also come from lprocfs, so we need
2558 *sync this with client_disconnect_export Bug15684*/
2559 down_read(&obd->u.cli.cl_sem);
2560 if (obd->u.cli.cl_import)
2561 imp = class_import_get(obd->u.cli.cl_import);
2562 up_read(&obd->u.cli.cl_sem);
2566 /* We could possibly pass max_age in the request (as an absolute
2567 * timestamp or a "seconds.usec ago") so the target can avoid doing
2568 * extra calls into the filesystem if that isn't necessary (e.g.
2569 * during mount that would help a bit). Having relative timestamps
2570 * is not so great if request processing is slow, while absolute
2571 * timestamps are not ideal because they need time synchronization. */
2572 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2574 class_import_put(imp);
2579 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2581 ptlrpc_request_free(req);
2584 ptlrpc_request_set_replen(req);
2585 req->rq_request_portal = OST_CREATE_PORTAL;
2586 ptlrpc_at_set_req_timeout(req);
2588 if (flags & OBD_STATFS_NODELAY) {
2589 /* procfs requests not want stat in wait for avoid deadlock */
2590 req->rq_no_resend = 1;
2591 req->rq_no_delay = 1;
2594 rc = ptlrpc_queue_wait(req);
2598 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2600 GOTO(out, rc = -EPROTO);
2607 ptlrpc_req_finished(req);
2611 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2612 void *karg, void *uarg)
2614 struct obd_device *obd = exp->exp_obd;
2615 struct obd_ioctl_data *data = karg;
2619 if (!try_module_get(THIS_MODULE)) {
2620 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2621 module_name(THIS_MODULE));
2625 case OBD_IOC_CLIENT_RECOVER:
2626 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2627 data->ioc_inlbuf1, 0);
2631 case IOC_OSC_SET_ACTIVE:
2632 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2635 case OBD_IOC_POLL_QUOTACHECK:
2636 err = osc_quota_poll_check(exp, (struct if_quotacheck *)karg);
2638 case OBD_IOC_PING_TARGET:
2639 err = ptlrpc_obd_ping(obd);
2642 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2643 cmd, current_comm());
2644 GOTO(out, err = -ENOTTY);
2647 module_put(THIS_MODULE);
2651 static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
2652 obd_count keylen, void *key, __u32 *vallen, void *val,
2653 struct lov_stripe_md *lsm)
2656 if (!vallen || !val)
2659 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2660 __u32 *stripe = val;
2661 *vallen = sizeof(*stripe);
2664 } else if (KEY_IS(KEY_LAST_ID)) {
2665 struct ptlrpc_request *req;
2670 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2671 &RQF_OST_GET_INFO_LAST_ID);
2675 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2676 RCL_CLIENT, keylen);
2677 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
2679 ptlrpc_request_free(req);
2683 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2684 memcpy(tmp, key, keylen);
2686 req->rq_no_delay = req->rq_no_resend = 1;
2687 ptlrpc_request_set_replen(req);
2688 rc = ptlrpc_queue_wait(req);
2692 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
2694 GOTO(out, rc = -EPROTO);
2696 *((obd_id *)val) = *reply;
2698 ptlrpc_req_finished(req);
2700 } else if (KEY_IS(KEY_FIEMAP)) {
2701 struct ll_fiemap_info_key *fm_key =
2702 (struct ll_fiemap_info_key *)key;
2703 struct ldlm_res_id res_id;
2704 ldlm_policy_data_t policy;
2705 struct lustre_handle lockh;
2706 ldlm_mode_t mode = 0;
2707 struct ptlrpc_request *req;
2708 struct ll_user_fiemap *reply;
2712 if (!(fm_key->fiemap.fm_flags & FIEMAP_FLAG_SYNC))
2715 policy.l_extent.start = fm_key->fiemap.fm_start &
2718 if (OBD_OBJECT_EOF - fm_key->fiemap.fm_length <=
2719 fm_key->fiemap.fm_start + PAGE_CACHE_SIZE - 1)
2720 policy.l_extent.end = OBD_OBJECT_EOF;
2722 policy.l_extent.end = (fm_key->fiemap.fm_start +
2723 fm_key->fiemap.fm_length +
2724 PAGE_CACHE_SIZE - 1) & CFS_PAGE_MASK;
2726 ostid_build_res_name(&fm_key->oa.o_oi, &res_id);
2727 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
2728 LDLM_FL_BLOCK_GRANTED |
2730 &res_id, LDLM_EXTENT, &policy,
2731 LCK_PR | LCK_PW, &lockh, 0);
2732 if (mode) { /* lock is cached on client */
2733 if (mode != LCK_PR) {
2734 ldlm_lock_addref(&lockh, LCK_PR);
2735 ldlm_lock_decref(&lockh, LCK_PW);
2737 } else { /* no cached lock, needs acquire lock on server side */
2738 fm_key->oa.o_valid |= OBD_MD_FLFLAGS;
2739 fm_key->oa.o_flags |= OBD_FL_SRVLOCK;
2743 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2744 &RQF_OST_GET_INFO_FIEMAP);
2746 GOTO(drop_lock, rc = -ENOMEM);
2748 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
2749 RCL_CLIENT, keylen);
2750 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
2751 RCL_CLIENT, *vallen);
2752 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
2753 RCL_SERVER, *vallen);
2755 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
2757 ptlrpc_request_free(req);
2758 GOTO(drop_lock, rc);
2761 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
2762 memcpy(tmp, key, keylen);
2763 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
2764 memcpy(tmp, val, *vallen);
2766 ptlrpc_request_set_replen(req);
2767 rc = ptlrpc_queue_wait(req);
2771 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
2773 GOTO(fini_req, rc = -EPROTO);
2775 memcpy(val, reply, *vallen);
2777 ptlrpc_req_finished(req);
2780 ldlm_lock_decref(&lockh, LCK_PR);
2787 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2788 obd_count keylen, void *key, obd_count vallen,
2789 void *val, struct ptlrpc_request_set *set)
2791 struct ptlrpc_request *req;
2792 struct obd_device *obd = exp->exp_obd;
2793 struct obd_import *imp = class_exp2cliimp(exp);
2798 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2800 if (KEY_IS(KEY_CHECKSUM)) {
2801 if (vallen != sizeof(int))
2803 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2807 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2808 sptlrpc_conf_client_adapt(obd);
2812 if (KEY_IS(KEY_FLUSH_CTX)) {
2813 sptlrpc_import_flush_my_ctx(imp);
2817 if (KEY_IS(KEY_CACHE_SET)) {
2818 struct client_obd *cli = &obd->u.cli;
2820 LASSERT(cli->cl_cache == NULL); /* only once */
2821 cli->cl_cache = (struct cl_client_cache *)val;
2822 atomic_inc(&cli->cl_cache->ccc_users);
2823 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2825 /* add this osc into entity list */
2826 LASSERT(list_empty(&cli->cl_lru_osc));
2827 spin_lock(&cli->cl_cache->ccc_lru_lock);
2828 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2829 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2834 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2835 struct client_obd *cli = &obd->u.cli;
2836 int nr = atomic_read(&cli->cl_lru_in_list) >> 1;
2837 int target = *(int *)val;
2839 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2844 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2847 /* We pass all other commands directly to OST. Since nobody calls osc
2848 methods directly and everybody is supposed to go through LOV, we
2849 assume lov checked invalid values for us.
2850 The only recognised values so far are evict_by_nid and mds_conn.
2851 Even if something bad goes through, we'd get a -EINVAL from OST
2854 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2855 &RQF_OST_SET_GRANT_INFO :
2860 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2861 RCL_CLIENT, keylen);
2862 if (!KEY_IS(KEY_GRANT_SHRINK))
2863 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2864 RCL_CLIENT, vallen);
2865 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2867 ptlrpc_request_free(req);
2871 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2872 memcpy(tmp, key, keylen);
2873 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2876 memcpy(tmp, val, vallen);
2878 if (KEY_IS(KEY_GRANT_SHRINK)) {
2879 struct osc_grant_args *aa;
2882 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2883 aa = ptlrpc_req_async_args(req);
2886 ptlrpc_req_finished(req);
2889 *oa = ((struct ost_body *)val)->oa;
2891 req->rq_interpret_reply = osc_shrink_grant_interpret;
2894 ptlrpc_request_set_replen(req);
2895 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2896 LASSERT(set != NULL);
2897 ptlrpc_set_add_req(set, req);
2898 ptlrpc_check_set(NULL, set);
2900 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
2905 static int osc_reconnect(const struct lu_env *env,
2906 struct obd_export *exp, struct obd_device *obd,
2907 struct obd_uuid *cluuid,
2908 struct obd_connect_data *data,
2911 struct client_obd *cli = &obd->u.cli;
2913 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2916 client_obd_list_lock(&cli->cl_loi_list_lock);
2917 data->ocd_grant = (cli->cl_avail_grant +
2918 (cli->cl_dirty_pages << PAGE_CACHE_SHIFT)) ?:
2919 2 * cli_brw_size(obd);
2920 lost_grant = cli->cl_lost_grant;
2921 cli->cl_lost_grant = 0;
2922 client_obd_list_unlock(&cli->cl_loi_list_lock);
2924 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
2925 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
2926 data->ocd_version, data->ocd_grant, lost_grant);
2932 static int osc_disconnect(struct obd_export *exp)
2934 struct obd_device *obd = class_exp2obd(exp);
2935 struct llog_ctxt *ctxt;
2938 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
2940 if (obd->u.cli.cl_conn_count == 1) {
2941 /* Flush any remaining cancel messages out to the
2943 llog_sync(ctxt, exp, 0);
2945 llog_ctxt_put(ctxt);
2947 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
2951 rc = client_disconnect_export(exp);
2953 * Initially we put del_shrink_grant before disconnect_export, but it
2954 * causes the following problem if setup (connect) and cleanup
2955 * (disconnect) are tangled together.
2956 * connect p1 disconnect p2
2957 * ptlrpc_connect_import
2958 * ............... class_manual_cleanup
2961 * ptlrpc_connect_interrupt
2963 * add this client to shrink list
2965 * Bang! pinger trigger the shrink.
2966 * So the osc should be disconnected from the shrink list, after we
2967 * are sure the import has been destroyed. BUG18662
2969 if (obd->u.cli.cl_import == NULL)
2970 osc_del_shrink_grant(&obd->u.cli);
2974 static int osc_import_event(struct obd_device *obd,
2975 struct obd_import *imp,
2976 enum obd_import_event event)
2978 struct client_obd *cli;
2982 LASSERT(imp->imp_obd == obd);
2985 case IMP_EVENT_DISCON: {
2987 client_obd_list_lock(&cli->cl_loi_list_lock);
2988 cli->cl_avail_grant = 0;
2989 cli->cl_lost_grant = 0;
2990 client_obd_list_unlock(&cli->cl_loi_list_lock);
2993 case IMP_EVENT_INACTIVE: {
2994 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
2997 case IMP_EVENT_INVALIDATE: {
2998 struct ldlm_namespace *ns = obd->obd_namespace;
3002 env = cl_env_get(&refcheck);
3006 /* all pages go to failing rpcs due to the invalid
3008 osc_io_unplug(env, cli, NULL, PDL_POLICY_ROUND);
3010 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3011 cl_env_put(env, &refcheck);
3016 case IMP_EVENT_ACTIVE: {
3017 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3020 case IMP_EVENT_OCD: {
3021 struct obd_connect_data *ocd = &imp->imp_connect_data;
3023 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3024 osc_init_grant(&obd->u.cli, ocd);
3027 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3028 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3030 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3033 case IMP_EVENT_DEACTIVATE: {
3034 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
3037 case IMP_EVENT_ACTIVATE: {
3038 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
3042 CERROR("Unknown import event %d\n", event);
3049 * Determine whether the lock can be canceled before replaying the lock
3050 * during recovery, see bug16774 for detailed information.
3052 * \retval zero the lock can't be canceled
3053 * \retval other ok to cancel
3055 static int osc_cancel_weight(struct ldlm_lock *lock)
3058 * Cancel all unused and granted extent lock.
3060 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3061 lock->l_granted_mode == lock->l_req_mode &&
3062 osc_ldlm_weigh_ast(lock) == 0)
3068 static int brw_queue_work(const struct lu_env *env, void *data)
3070 struct client_obd *cli = data;
3072 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3074 osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
3078 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3080 struct client_obd *cli = &obd->u.cli;
3081 struct obd_type *type;
3086 rc = ptlrpcd_addref();
3090 rc = client_obd_setup(obd, lcfg);
3092 GOTO(out_ptlrpcd, rc);
3094 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3095 if (IS_ERR(handler))
3096 GOTO(out_client_setup, rc = PTR_ERR(handler));
3097 cli->cl_writeback_work = handler;
3099 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3100 if (IS_ERR(handler))
3101 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3102 cli->cl_lru_work = handler;
3104 rc = osc_quota_setup(obd);
3106 GOTO(out_ptlrpcd_work, rc);
3108 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3111 obd->obd_vars = lprocfs_osc_obd_vars;
3113 /* If this is true then both client (osc) and server (osp) are on the
3114 * same node. The osp layer if loaded first will register the osc proc
3115 * directory. In that case this obd_device will be attached its proc
3116 * tree to type->typ_procsym instead of obd->obd_type->typ_procroot. */
3117 type = class_search_type(LUSTRE_OSP_NAME);
3118 if (type && type->typ_procsym) {
3119 obd->obd_proc_entry = lprocfs_seq_register(obd->obd_name,
3121 obd->obd_vars, obd);
3122 if (IS_ERR(obd->obd_proc_entry)) {
3123 rc = PTR_ERR(obd->obd_proc_entry);
3124 CERROR("error %d setting up lprocfs for %s\n", rc,
3126 obd->obd_proc_entry = NULL;
3129 rc = lprocfs_obd_setup(obd);
3132 /* If the basic OSC proc tree construction succeeded then
3133 * lets do the rest. */
3135 lproc_osc_attach_seqstat(obd);
3136 sptlrpc_lprocfs_cliobd_attach(obd);
3137 ptlrpc_lprocfs_register_obd(obd);
3140 /* We need to allocate a few requests more, because
3141 * brw_interpret tries to create new requests before freeing
3142 * previous ones, Ideally we want to have 2x max_rpcs_in_flight
3143 * reserved, but I'm afraid that might be too much wasted RAM
3144 * in fact, so 2 is just my guess and still should work. */
3145 cli->cl_import->imp_rq_pool =
3146 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3148 ptlrpc_add_rqs_to_pool);
3150 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
3151 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3155 if (cli->cl_writeback_work != NULL) {
3156 ptlrpcd_destroy_work(cli->cl_writeback_work);
3157 cli->cl_writeback_work = NULL;
3159 if (cli->cl_lru_work != NULL) {
3160 ptlrpcd_destroy_work(cli->cl_lru_work);
3161 cli->cl_lru_work = NULL;
3164 client_obd_cleanup(obd);
3170 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3176 case OBD_CLEANUP_EARLY: {
3177 struct obd_import *imp;
3178 imp = obd->u.cli.cl_import;
3179 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3180 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3181 ptlrpc_deactivate_import(imp);
3182 spin_lock(&imp->imp_lock);
3183 imp->imp_pingable = 0;
3184 spin_unlock(&imp->imp_lock);
3187 case OBD_CLEANUP_EXPORTS: {
3188 struct client_obd *cli = &obd->u.cli;
3190 * for echo client, export may be on zombie list, wait for
3191 * zombie thread to cull it, because cli.cl_import will be
3192 * cleared in client_disconnect_export():
3193 * class_export_destroy() -> obd_cleanup() ->
3194 * echo_device_free() -> echo_client_cleanup() ->
3195 * obd_disconnect() -> osc_disconnect() ->
3196 * client_disconnect_export()
3198 obd_zombie_barrier();
3199 if (cli->cl_writeback_work) {
3200 ptlrpcd_destroy_work(cli->cl_writeback_work);
3201 cli->cl_writeback_work = NULL;
3203 if (cli->cl_lru_work) {
3204 ptlrpcd_destroy_work(cli->cl_lru_work);
3205 cli->cl_lru_work = NULL;
3207 obd_cleanup_client_import(obd);
3208 ptlrpc_lprocfs_unregister_obd(obd);
3209 lprocfs_obd_cleanup(obd);
3210 rc = obd_llog_finish(obd, 0);
3212 CERROR("failed to cleanup llogging subsystems\n");
3219 int osc_cleanup(struct obd_device *obd)
3221 struct client_obd *cli = &obd->u.cli;
3227 if (cli->cl_cache != NULL) {
3228 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3229 spin_lock(&cli->cl_cache->ccc_lru_lock);
3230 list_del_init(&cli->cl_lru_osc);
3231 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3232 cli->cl_lru_left = NULL;
3233 atomic_dec(&cli->cl_cache->ccc_users);
3234 cli->cl_cache = NULL;
3237 /* free memory of osc quota cache */
3238 osc_quota_cleanup(obd);
3240 rc = client_obd_cleanup(obd);
3246 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3248 int rc = class_process_proc_param(PARAM_OSC, obd->obd_vars, lcfg, obd);
3249 return rc > 0 ? 0: rc;
3252 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
3254 return osc_process_config_base(obd, buf);
3257 struct obd_ops osc_obd_ops = {
3258 .o_owner = THIS_MODULE,
3259 .o_setup = osc_setup,
3260 .o_precleanup = osc_precleanup,
3261 .o_cleanup = osc_cleanup,
3262 .o_add_conn = client_import_add_conn,
3263 .o_del_conn = client_import_del_conn,
3264 .o_connect = client_connect_import,
3265 .o_reconnect = osc_reconnect,
3266 .o_disconnect = osc_disconnect,
3267 .o_statfs = osc_statfs,
3268 .o_statfs_async = osc_statfs_async,
3269 .o_unpackmd = osc_unpackmd,
3270 .o_create = osc_create,
3271 .o_destroy = osc_destroy,
3272 .o_getattr = osc_getattr,
3273 .o_getattr_async = osc_getattr_async,
3274 .o_setattr = osc_setattr,
3275 .o_setattr_async = osc_setattr_async,
3276 .o_change_cbdata = osc_change_cbdata,
3277 .o_find_cbdata = osc_find_cbdata,
3278 .o_iocontrol = osc_iocontrol,
3279 .o_get_info = osc_get_info,
3280 .o_set_info_async = osc_set_info_async,
3281 .o_import_event = osc_import_event,
3282 .o_process_config = osc_process_config,
3283 .o_quotactl = osc_quotactl,
3284 .o_quotacheck = osc_quotacheck,
3287 extern struct lu_kmem_descr osc_caches[];
3288 extern spinlock_t osc_ast_guard;
3289 extern struct lock_class_key osc_ast_guard_class;
3291 int __init osc_init(void)
3293 bool enable_proc = true;
3294 struct obd_type *type;
3298 /* print an address of _any_ initialized kernel symbol from this
3299 * module, to allow debugging with gdb that doesn't support data
3300 * symbols from modules.*/
3301 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3303 rc = lu_kmem_init(osc_caches);
3307 type = class_search_type(LUSTRE_OSP_NAME);
3308 if (type != NULL && type->typ_procsym != NULL)
3309 enable_proc = false;
3311 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
3312 #ifndef HAVE_ONLY_PROCFS_SEQ
3315 LUSTRE_OSC_NAME, &osc_device_type);
3317 lu_kmem_fini(osc_caches);
3321 spin_lock_init(&osc_ast_guard);
3322 lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
3327 static void /*__exit*/ osc_exit(void)
3329 class_unregister_type(LUSTRE_OSC_NAME);
3330 lu_kmem_fini(osc_caches);
3333 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3334 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3335 MODULE_LICENSE("GPL");
3337 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);