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>
41 #include <lustre_dlm.h>
42 #include <lustre_net.h>
43 #include <lustre/lustre_user.h>
44 #include <obd_cksum.h>
45 #include <lustre_ha.h>
46 #include <lprocfs_status.h>
47 #include <lustre_ioctl.h>
48 #include <lustre_debug.h>
49 #include <lustre_param.h>
50 #include <lustre_fid.h>
51 #include <obd_class.h>
52 #include "osc_internal.h"
53 #include "osc_cl_internal.h"
55 struct osc_brw_async_args {
59 obd_count aa_page_count;
61 struct brw_page **aa_ppga;
62 struct client_obd *aa_cli;
63 struct list_head aa_oaps;
64 struct list_head aa_exts;
65 struct obd_capa *aa_ocapa;
66 struct cl_req *aa_clerq;
69 #define osc_grant_args osc_brw_async_args
71 struct osc_async_args {
72 struct obd_info *aa_oi;
75 struct osc_setattr_args {
77 obd_enqueue_update_f sa_upcall;
81 struct osc_fsync_args {
82 struct obd_info *fa_oi;
83 obd_enqueue_update_f fa_upcall;
87 struct osc_enqueue_args {
88 struct obd_export *oa_exp;
92 osc_enqueue_upcall_f oa_upcall;
94 struct ost_lvb *oa_lvb;
95 struct lustre_handle oa_lockh;
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_EXT3_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_long_read(&obd_dirty_pages) -
815 atomic_long_read(&obd_dirty_transit_pages) >
816 (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 %ld - %ld > system dirty_max %lu\n",
821 cli->cl_import->imp_obd->obd_name,
822 atomic_long_read(&obd_dirty_pages),
823 atomic_long_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);
1417 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1418 CDEBUG(D_RPCTRACE, "brw rpc %p - object "DOSTID" offset %lld<>%lld\n",
1419 req, POSTID(&oa->o_oi), niobuf[0].rnb_offset,
1420 niobuf[niocount - 1].rnb_offset + niobuf[niocount - 1].rnb_len);
1424 ptlrpc_req_finished(req);
1428 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1429 __u32 client_cksum, __u32 server_cksum, int nob,
1430 obd_count page_count, struct brw_page **pga,
1431 cksum_type_t client_cksum_type)
1435 cksum_type_t cksum_type;
1437 if (server_cksum == client_cksum) {
1438 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1442 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1444 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1447 if (cksum_type != client_cksum_type)
1448 msg = "the server did not use the checksum type specified in "
1449 "the original request - likely a protocol problem";
1450 else if (new_cksum == server_cksum)
1451 msg = "changed on the client after we checksummed it - "
1452 "likely false positive due to mmap IO (bug 11742)";
1453 else if (new_cksum == client_cksum)
1454 msg = "changed in transit before arrival at OST";
1456 msg = "changed in transit AND doesn't match the original - "
1457 "likely false positive due to mmap IO (bug 11742)";
1459 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1460 " object "DOSTID" extent ["LPU64"-"LPU64"]\n",
1461 msg, libcfs_nid2str(peer->nid),
1462 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1463 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1464 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1465 POSTID(&oa->o_oi), pga[0]->off,
1466 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1467 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1468 "client csum now %x\n", client_cksum, client_cksum_type,
1469 server_cksum, cksum_type, new_cksum);
1473 /* Note rc enters this function as number of bytes transferred */
1474 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1476 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1477 const lnet_process_id_t *peer =
1478 &req->rq_import->imp_connection->c_peer;
1479 struct client_obd *cli = aa->aa_cli;
1480 struct ost_body *body;
1481 __u32 client_cksum = 0;
1484 if (rc < 0 && rc != -EDQUOT) {
1485 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1489 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1490 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1492 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1496 /* set/clear over quota flag for a uid/gid */
1497 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1498 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1499 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1501 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid "LPX64", flags %x\n",
1502 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1504 osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
1507 osc_update_grant(cli, body);
1512 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1513 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1515 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1517 CERROR("Unexpected +ve rc %d\n", rc);
1520 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1522 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1525 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1526 check_write_checksum(&body->oa, peer, client_cksum,
1527 body->oa.o_cksum, aa->aa_requested_nob,
1528 aa->aa_page_count, aa->aa_ppga,
1529 cksum_type_unpack(aa->aa_oa->o_flags)))
1532 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1533 aa->aa_page_count, aa->aa_ppga);
1537 /* The rest of this function executes only for OST_READs */
1539 /* if unwrap_bulk failed, return -EAGAIN to retry */
1540 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1542 GOTO(out, rc = -EAGAIN);
1544 if (rc > aa->aa_requested_nob) {
1545 CERROR("Unexpected rc %d (%d requested)\n", rc,
1546 aa->aa_requested_nob);
1550 if (rc != req->rq_bulk->bd_nob_transferred) {
1551 CERROR ("Unexpected rc %d (%d transferred)\n",
1552 rc, req->rq_bulk->bd_nob_transferred);
1556 if (rc < aa->aa_requested_nob)
1557 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1559 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1560 static int cksum_counter;
1561 __u32 server_cksum = body->oa.o_cksum;
1564 cksum_type_t cksum_type;
1566 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1567 body->oa.o_flags : 0);
1568 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1569 aa->aa_ppga, OST_READ,
1572 if (peer->nid == req->rq_bulk->bd_sender) {
1576 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1579 if (server_cksum != client_cksum) {
1580 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1581 "%s%s%s inode "DFID" object "DOSTID
1582 " extent ["LPU64"-"LPU64"]\n",
1583 req->rq_import->imp_obd->obd_name,
1584 libcfs_nid2str(peer->nid),
1586 body->oa.o_valid & OBD_MD_FLFID ?
1587 body->oa.o_parent_seq : (__u64)0,
1588 body->oa.o_valid & OBD_MD_FLFID ?
1589 body->oa.o_parent_oid : 0,
1590 body->oa.o_valid & OBD_MD_FLFID ?
1591 body->oa.o_parent_ver : 0,
1592 POSTID(&body->oa.o_oi),
1593 aa->aa_ppga[0]->off,
1594 aa->aa_ppga[aa->aa_page_count-1]->off +
1595 aa->aa_ppga[aa->aa_page_count-1]->count -
1597 CERROR("client %x, server %x, cksum_type %x\n",
1598 client_cksum, server_cksum, cksum_type);
1600 aa->aa_oa->o_cksum = client_cksum;
1604 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1607 } else if (unlikely(client_cksum)) {
1608 static int cksum_missed;
1611 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1612 CERROR("Checksum %u requested from %s but not sent\n",
1613 cksum_missed, libcfs_nid2str(peer->nid));
1619 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1620 aa->aa_oa, &body->oa);
1625 static int osc_brw_redo_request(struct ptlrpc_request *request,
1626 struct osc_brw_async_args *aa, int rc)
1628 struct ptlrpc_request *new_req;
1629 struct osc_brw_async_args *new_aa;
1630 struct osc_async_page *oap;
1633 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1634 "redo for recoverable error %d", rc);
1636 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1637 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1638 aa->aa_cli, aa->aa_oa,
1639 NULL /* lsm unused by osc currently */,
1640 aa->aa_page_count, aa->aa_ppga,
1641 &new_req, aa->aa_ocapa, 0, 1);
1645 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1646 if (oap->oap_request != NULL) {
1647 LASSERTF(request == oap->oap_request,
1648 "request %p != oap_request %p\n",
1649 request, oap->oap_request);
1650 if (oap->oap_interrupted) {
1651 ptlrpc_req_finished(new_req);
1656 /* New request takes over pga and oaps from old request.
1657 * Note that copying a list_head doesn't work, need to move it... */
1659 new_req->rq_interpret_reply = request->rq_interpret_reply;
1660 new_req->rq_async_args = request->rq_async_args;
1661 new_req->rq_commit_cb = request->rq_commit_cb;
1662 /* cap resend delay to the current request timeout, this is similar to
1663 * what ptlrpc does (see after_reply()) */
1664 if (aa->aa_resends > new_req->rq_timeout)
1665 new_req->rq_sent = cfs_time_current_sec() + new_req->rq_timeout;
1667 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1668 new_req->rq_generation_set = 1;
1669 new_req->rq_import_generation = request->rq_import_generation;
1671 new_aa = ptlrpc_req_async_args(new_req);
1673 INIT_LIST_HEAD(&new_aa->aa_oaps);
1674 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1675 INIT_LIST_HEAD(&new_aa->aa_exts);
1676 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1677 new_aa->aa_resends = aa->aa_resends;
1679 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1680 if (oap->oap_request) {
1681 ptlrpc_req_finished(oap->oap_request);
1682 oap->oap_request = ptlrpc_request_addref(new_req);
1686 new_aa->aa_ocapa = aa->aa_ocapa;
1687 aa->aa_ocapa = NULL;
1689 /* XXX: This code will run into problem if we're going to support
1690 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1691 * and wait for all of them to be finished. We should inherit request
1692 * set from old request. */
1693 ptlrpcd_add_req(new_req, PDL_POLICY_SAME, -1);
1695 DEBUG_REQ(D_INFO, new_req, "new request");
1700 * ugh, we want disk allocation on the target to happen in offset order. we'll
1701 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1702 * fine for our small page arrays and doesn't require allocation. its an
1703 * insertion sort that swaps elements that are strides apart, shrinking the
1704 * stride down until its '1' and the array is sorted.
1706 static void sort_brw_pages(struct brw_page **array, int num)
1709 struct brw_page *tmp;
1713 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1718 for (i = stride ; i < num ; i++) {
1721 while (j >= stride && array[j - stride]->off > tmp->off) {
1722 array[j] = array[j - stride];
1727 } while (stride > 1);
1730 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1732 LASSERT(ppga != NULL);
1733 OBD_FREE(ppga, sizeof(*ppga) * count);
1736 static int brw_interpret(const struct lu_env *env,
1737 struct ptlrpc_request *req, void *data, int rc)
1739 struct osc_brw_async_args *aa = data;
1740 struct osc_extent *ext;
1741 struct osc_extent *tmp;
1742 struct client_obd *cli = aa->aa_cli;
1745 rc = osc_brw_fini_request(req, rc);
1746 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1747 /* When server return -EINPROGRESS, client should always retry
1748 * regardless of the number of times the bulk was resent already. */
1749 if (osc_recoverable_error(rc)) {
1750 if (req->rq_import_generation !=
1751 req->rq_import->imp_generation) {
1752 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1753 ""DOSTID", rc = %d.\n",
1754 req->rq_import->imp_obd->obd_name,
1755 POSTID(&aa->aa_oa->o_oi), rc);
1756 } else if (rc == -EINPROGRESS ||
1757 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1758 rc = osc_brw_redo_request(req, aa, rc);
1760 CERROR("%s: too many resent retries for object: "
1761 ""LPU64":"LPU64", rc = %d.\n",
1762 req->rq_import->imp_obd->obd_name,
1763 POSTID(&aa->aa_oa->o_oi), rc);
1768 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1773 capa_put(aa->aa_ocapa);
1774 aa->aa_ocapa = NULL;
1778 struct obdo *oa = aa->aa_oa;
1779 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1780 unsigned long valid = 0;
1781 struct cl_object *obj;
1782 struct osc_async_page *last;
1784 last = brw_page2oap(aa->aa_ppga[aa->aa_page_count - 1]);
1785 obj = osc2cl(last->oap_obj);
1787 cl_object_attr_lock(obj);
1788 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1789 attr->cat_blocks = oa->o_blocks;
1790 valid |= CAT_BLOCKS;
1792 if (oa->o_valid & OBD_MD_FLMTIME) {
1793 attr->cat_mtime = oa->o_mtime;
1796 if (oa->o_valid & OBD_MD_FLATIME) {
1797 attr->cat_atime = oa->o_atime;
1800 if (oa->o_valid & OBD_MD_FLCTIME) {
1801 attr->cat_ctime = oa->o_ctime;
1805 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1806 struct lov_oinfo *loi = cl2osc(obj)->oo_oinfo;
1807 loff_t last_off = last->oap_count + last->oap_obj_off +
1810 /* Change file size if this is an out of quota or
1811 * direct IO write and it extends the file size */
1812 if (loi->loi_lvb.lvb_size < last_off) {
1813 attr->cat_size = last_off;
1816 /* Extend KMS if it's not a lockless write */
1817 if (loi->loi_kms < last_off &&
1818 oap2osc_page(last)->ops_srvlock == 0) {
1819 attr->cat_kms = last_off;
1825 cl_object_attr_set(env, obj, attr, valid);
1826 cl_object_attr_unlock(obj);
1828 OBDO_FREE(aa->aa_oa);
1830 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE && rc == 0)
1831 osc_inc_unstable_pages(req);
1833 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1834 list_del_init(&ext->oe_link);
1835 osc_extent_finish(env, ext, 1, rc);
1837 LASSERT(list_empty(&aa->aa_exts));
1838 LASSERT(list_empty(&aa->aa_oaps));
1840 cl_req_completion(env, aa->aa_clerq, rc < 0 ? rc :
1841 req->rq_bulk->bd_nob_transferred);
1842 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1843 ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
1845 client_obd_list_lock(&cli->cl_loi_list_lock);
1846 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1847 * is called so we know whether to go to sync BRWs or wait for more
1848 * RPCs to complete */
1849 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1850 cli->cl_w_in_flight--;
1852 cli->cl_r_in_flight--;
1853 osc_wake_cache_waiters(cli);
1854 client_obd_list_unlock(&cli->cl_loi_list_lock);
1856 osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
1860 static void brw_commit(struct ptlrpc_request *req)
1862 /* If osc_inc_unstable_pages (via osc_extent_finish) races with
1863 * this called via the rq_commit_cb, I need to ensure
1864 * osc_dec_unstable_pages is still called. Otherwise unstable
1865 * pages may be leaked. */
1866 spin_lock(&req->rq_lock);
1867 if (likely(req->rq_unstable)) {
1868 req->rq_unstable = 0;
1869 spin_unlock(&req->rq_lock);
1871 osc_dec_unstable_pages(req);
1873 req->rq_committed = 1;
1874 spin_unlock(&req->rq_lock);
1879 * Build an RPC by the list of extent @ext_list. The caller must ensure
1880 * that the total pages in this list are NOT over max pages per RPC.
1881 * Extents in the list must be in OES_RPC state.
1883 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
1884 struct list_head *ext_list, int cmd, pdl_policy_t pol)
1886 struct ptlrpc_request *req = NULL;
1887 struct osc_extent *ext;
1888 struct brw_page **pga = NULL;
1889 struct osc_brw_async_args *aa = NULL;
1890 struct obdo *oa = NULL;
1891 struct osc_async_page *oap;
1892 struct osc_async_page *tmp;
1893 struct cl_req *clerq = NULL;
1894 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE :
1896 struct cl_req_attr *crattr = NULL;
1897 obd_off starting_offset = OBD_OBJECT_EOF;
1898 obd_off ending_offset = 0;
1902 bool soft_sync = false;
1905 struct list_head rpc_list = LIST_HEAD_INIT(rpc_list);
1908 LASSERT(!list_empty(ext_list));
1910 /* add pages into rpc_list to build BRW rpc */
1911 list_for_each_entry(ext, ext_list, oe_link) {
1912 LASSERT(ext->oe_state == OES_RPC);
1913 mem_tight |= ext->oe_memalloc;
1914 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
1916 list_add_tail(&oap->oap_rpc_item, &rpc_list);
1917 if (starting_offset > oap->oap_obj_off)
1918 starting_offset = oap->oap_obj_off;
1920 LASSERT(oap->oap_page_off == 0);
1921 if (ending_offset < oap->oap_obj_off + oap->oap_count)
1922 ending_offset = oap->oap_obj_off +
1925 LASSERT(oap->oap_page_off + oap->oap_count ==
1930 soft_sync = osc_over_unstable_soft_limit(cli);
1932 mpflag = cfs_memory_pressure_get_and_set();
1934 OBD_ALLOC(crattr, sizeof(*crattr));
1936 GOTO(out, rc = -ENOMEM);
1938 OBD_ALLOC(pga, sizeof(*pga) * page_count);
1940 GOTO(out, rc = -ENOMEM);
1944 GOTO(out, rc = -ENOMEM);
1947 list_for_each_entry(oap, &rpc_list, oap_rpc_item) {
1948 struct cl_page *page = oap2cl_page(oap);
1949 if (clerq == NULL) {
1950 clerq = cl_req_alloc(env, page, crt,
1951 1 /* only 1-object rpcs for now */);
1953 GOTO(out, rc = PTR_ERR(clerq));
1956 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
1958 oap->oap_brw_flags |= OBD_BRW_SOFT_SYNC;
1959 pga[i] = &oap->oap_brw_page;
1960 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
1961 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
1962 pga[i]->pg, page_index(oap->oap_page), oap,
1965 cl_req_page_add(env, clerq, page);
1968 /* always get the data for the obdo for the rpc */
1969 LASSERT(clerq != NULL);
1970 crattr->cra_oa = oa;
1971 cl_req_attr_set(env, clerq, crattr, ~0ULL);
1973 rc = cl_req_prep(env, clerq);
1975 CERROR("cl_req_prep failed: %d\n", rc);
1979 sort_brw_pages(pga, page_count);
1980 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
1981 pga, &req, crattr->cra_capa, 1, 0);
1983 CERROR("prep_req failed: %d\n", rc);
1987 req->rq_commit_cb = brw_commit;
1988 req->rq_interpret_reply = brw_interpret;
1991 req->rq_memalloc = 1;
1993 /* Need to update the timestamps after the request is built in case
1994 * we race with setattr (locally or in queue at OST). If OST gets
1995 * later setattr before earlier BRW (as determined by the request xid),
1996 * the OST will not use BRW timestamps. Sadly, there is no obvious
1997 * way to do this in a single call. bug 10150 */
1998 cl_req_attr_set(env, clerq, crattr,
1999 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2001 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2003 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2004 aa = ptlrpc_req_async_args(req);
2005 INIT_LIST_HEAD(&aa->aa_oaps);
2006 list_splice_init(&rpc_list, &aa->aa_oaps);
2007 INIT_LIST_HEAD(&aa->aa_exts);
2008 list_splice_init(ext_list, &aa->aa_exts);
2009 aa->aa_clerq = clerq;
2011 /* queued sync pages can be torn down while the pages
2012 * were between the pending list and the rpc */
2014 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2015 /* only one oap gets a request reference */
2018 if (oap->oap_interrupted && !req->rq_intr) {
2019 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2021 ptlrpc_mark_interrupted(req);
2025 tmp->oap_request = ptlrpc_request_addref(req);
2027 client_obd_list_lock(&cli->cl_loi_list_lock);
2028 starting_offset >>= PAGE_CACHE_SHIFT;
2029 if (cmd == OBD_BRW_READ) {
2030 cli->cl_r_in_flight++;
2031 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2032 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2033 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2034 starting_offset + 1);
2036 cli->cl_w_in_flight++;
2037 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2038 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2039 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2040 starting_offset + 1);
2042 client_obd_list_unlock(&cli->cl_loi_list_lock);
2044 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %ur/%uw in flight",
2045 page_count, aa, cli->cl_r_in_flight,
2046 cli->cl_w_in_flight);
2048 /* XXX: Maybe the caller can check the RPC bulk descriptor to
2049 * see which CPU/NUMA node the majority of pages were allocated
2050 * on, and try to assign the async RPC to the CPU core
2051 * (PDL_POLICY_PREFERRED) to reduce cross-CPU memory traffic.
2053 * But on the other hand, we expect that multiple ptlrpcd
2054 * threads and the initial write sponsor can run in parallel,
2055 * especially when data checksum is enabled, which is CPU-bound
2056 * operation and single ptlrpcd thread cannot process in time.
2057 * So more ptlrpcd threads sharing BRW load
2058 * (with PDL_POLICY_ROUND) seems better.
2060 ptlrpcd_add_req(req, pol, -1);
2066 cfs_memory_pressure_restore(mpflag);
2068 if (crattr != NULL) {
2069 capa_put(crattr->cra_capa);
2070 OBD_FREE(crattr, sizeof(*crattr));
2074 LASSERT(req == NULL);
2079 OBD_FREE(pga, sizeof(*pga) * page_count);
2080 /* this should happen rarely and is pretty bad, it makes the
2081 * pending list not follow the dirty order */
2082 while (!list_empty(ext_list)) {
2083 ext = list_entry(ext_list->next, struct osc_extent,
2085 list_del_init(&ext->oe_link);
2086 osc_extent_finish(env, ext, 0, rc);
2088 if (clerq && !IS_ERR(clerq))
2089 cl_req_completion(env, clerq, rc);
2094 static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
2095 struct ldlm_enqueue_info *einfo)
2097 void *data = einfo->ei_cbdata;
2100 LASSERT(lock != NULL);
2101 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
2102 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
2103 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
2104 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
2106 lock_res_and_lock(lock);
2108 if (lock->l_ast_data == NULL)
2109 lock->l_ast_data = data;
2110 if (lock->l_ast_data == data)
2113 unlock_res_and_lock(lock);
2118 static int osc_set_data_with_check(struct lustre_handle *lockh,
2119 struct ldlm_enqueue_info *einfo)
2121 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2125 set = osc_set_lock_data_with_check(lock, einfo);
2126 LDLM_LOCK_PUT(lock);
2128 CERROR("lockh %p, data %p - client evicted?\n",
2129 lockh, einfo->ei_cbdata);
2133 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2134 ldlm_iterator_t replace, void *data)
2136 struct ldlm_res_id res_id;
2137 struct obd_device *obd = class_exp2obd(exp);
2139 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2140 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2144 /* find any ldlm lock of the inode in osc
2148 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2149 ldlm_iterator_t replace, void *data)
2151 struct ldlm_res_id res_id;
2152 struct obd_device *obd = class_exp2obd(exp);
2155 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2156 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2157 if (rc == LDLM_ITER_STOP)
2159 if (rc == LDLM_ITER_CONTINUE)
2164 static int osc_enqueue_fini(struct ptlrpc_request *req,
2165 osc_enqueue_upcall_f upcall, void *cookie,
2166 struct lustre_handle *lockh, ldlm_mode_t mode,
2167 __u64 *flags, int agl, int errcode)
2169 bool intent = *flags & LDLM_FL_HAS_INTENT;
2173 /* The request was created before ldlm_cli_enqueue call. */
2174 if (intent && errcode == ELDLM_LOCK_ABORTED) {
2175 struct ldlm_reply *rep;
2177 rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
2178 LASSERT(rep != NULL);
2180 rep->lock_policy_res1 =
2181 ptlrpc_status_ntoh(rep->lock_policy_res1);
2182 if (rep->lock_policy_res1)
2183 errcode = rep->lock_policy_res1;
2185 *flags |= LDLM_FL_LVB_READY;
2186 } else if (errcode == ELDLM_OK) {
2187 *flags |= LDLM_FL_LVB_READY;
2190 /* Call the update callback. */
2191 rc = (*upcall)(cookie, lockh, errcode);
2193 /* release the reference taken in ldlm_cli_enqueue() */
2194 if (errcode == ELDLM_LOCK_MATCHED)
2196 if (errcode == ELDLM_OK && lustre_handle_is_used(lockh))
2197 ldlm_lock_decref(lockh, mode);
2202 static int osc_enqueue_interpret(const struct lu_env *env,
2203 struct ptlrpc_request *req,
2204 struct osc_enqueue_args *aa, int rc)
2206 struct ldlm_lock *lock;
2207 struct lustre_handle *lockh = &aa->oa_lockh;
2208 ldlm_mode_t mode = aa->oa_mode;
2209 struct ost_lvb *lvb = aa->oa_lvb;
2210 __u32 lvb_len = sizeof(*lvb);
2215 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2217 lock = ldlm_handle2lock(lockh);
2218 LASSERTF(lock != NULL,
2219 "lockh "LPX64", req %p, aa %p - client evicted?\n",
2220 lockh->cookie, req, aa);
2222 /* Take an additional reference so that a blocking AST that
2223 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2224 * to arrive after an upcall has been executed by
2225 * osc_enqueue_fini(). */
2226 ldlm_lock_addref(lockh, mode);
2228 /* Let cl_lock_state_wait fail with -ERESTARTSYS to unuse sublocks. */
2229 OBD_FAIL_TIMEOUT(OBD_FAIL_LDLM_ENQUEUE_HANG, 2);
2231 /* Let CP AST to grant the lock first. */
2232 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2235 LASSERT(aa->oa_lvb == NULL);
2236 LASSERT(aa->oa_flags == NULL);
2237 aa->oa_flags = &flags;
2240 /* Complete obtaining the lock procedure. */
2241 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_type, 1,
2242 aa->oa_mode, aa->oa_flags, lvb, lvb_len,
2244 /* Complete osc stuff. */
2245 rc = osc_enqueue_fini(req, aa->oa_upcall, aa->oa_cookie, lockh, mode,
2246 aa->oa_flags, aa->oa_agl, rc);
2248 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2250 ldlm_lock_decref(lockh, mode);
2251 LDLM_LOCK_PUT(lock);
2255 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2257 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2258 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2259 * other synchronous requests, however keeping some locks and trying to obtain
2260 * others may take a considerable amount of time in a case of ost failure; and
2261 * when other sync requests do not get released lock from a client, the client
2262 * is evicted from the cluster -- such scenarious make the life difficult, so
2263 * release locks just after they are obtained. */
2264 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2265 __u64 *flags, ldlm_policy_data_t *policy,
2266 struct ost_lvb *lvb, int kms_valid,
2267 osc_enqueue_upcall_f upcall, void *cookie,
2268 struct ldlm_enqueue_info *einfo,
2269 struct ptlrpc_request_set *rqset, int async, int agl)
2271 struct obd_device *obd = exp->exp_obd;
2272 struct lustre_handle lockh = { 0 };
2273 struct ptlrpc_request *req = NULL;
2274 int intent = *flags & LDLM_FL_HAS_INTENT;
2275 __u64 match_lvb = agl ? 0 : LDLM_FL_LVB_READY;
2280 /* Filesystem lock extents are extended to page boundaries so that
2281 * dealing with the page cache is a little smoother. */
2282 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
2283 policy->l_extent.end |= ~CFS_PAGE_MASK;
2286 * kms is not valid when either object is completely fresh (so that no
2287 * locks are cached), or object was evicted. In the latter case cached
2288 * lock cannot be used, because it would prime inode state with
2289 * potentially stale LVB.
2294 /* Next, search for already existing extent locks that will cover us */
2295 /* If we're trying to read, we also search for an existing PW lock. The
2296 * VFS and page cache already protect us locally, so lots of readers/
2297 * writers can share a single PW lock.
2299 * There are problems with conversion deadlocks, so instead of
2300 * converting a read lock to a write lock, we'll just enqueue a new
2303 * At some point we should cancel the read lock instead of making them
2304 * send us a blocking callback, but there are problems with canceling
2305 * locks out from other users right now, too. */
2306 mode = einfo->ei_mode;
2307 if (einfo->ei_mode == LCK_PR)
2309 mode = ldlm_lock_match(obd->obd_namespace, *flags | match_lvb, res_id,
2310 einfo->ei_type, policy, mode, &lockh, 0);
2312 struct ldlm_lock *matched;
2314 if (*flags & LDLM_FL_TEST_LOCK)
2317 matched = ldlm_handle2lock(&lockh);
2319 /* AGL enqueues DLM locks speculatively. Therefore if
2320 * it already exists a DLM lock, it wll just inform the
2321 * caller to cancel the AGL process for this stripe. */
2322 ldlm_lock_decref(&lockh, mode);
2323 LDLM_LOCK_PUT(matched);
2325 } else if (osc_set_lock_data_with_check(matched, einfo)) {
2326 *flags |= LDLM_FL_LVB_READY;
2328 /* We already have a lock, and it's referenced. */
2329 (*upcall)(cookie, &lockh, ELDLM_LOCK_MATCHED);
2331 ldlm_lock_decref(&lockh, mode);
2332 LDLM_LOCK_PUT(matched);
2335 ldlm_lock_decref(&lockh, mode);
2336 LDLM_LOCK_PUT(matched);
2341 if (*flags & LDLM_FL_TEST_LOCK)
2345 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2346 &RQF_LDLM_ENQUEUE_LVB);
2350 rc = ptlrpc_request_pack(req, LUSTRE_DLM_VERSION, LDLM_ENQUEUE);
2352 ptlrpc_request_free(req);
2356 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2358 ptlrpc_request_set_replen(req);
2361 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2362 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2364 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2365 sizeof(*lvb), LVB_T_OST, &lockh, async);
2368 struct osc_enqueue_args *aa;
2369 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2370 aa = ptlrpc_req_async_args(req);
2372 aa->oa_mode = einfo->ei_mode;
2373 aa->oa_type = einfo->ei_type;
2374 lustre_handle_copy(&aa->oa_lockh, &lockh);
2375 aa->oa_upcall = upcall;
2376 aa->oa_cookie = cookie;
2379 aa->oa_flags = flags;
2382 /* AGL is essentially to enqueue an DLM lock
2383 * in advance, so we don't care about the
2384 * result of AGL enqueue. */
2386 aa->oa_flags = NULL;
2389 req->rq_interpret_reply =
2390 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2391 if (rqset == PTLRPCD_SET)
2392 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
2394 ptlrpc_set_add_req(rqset, req);
2395 } else if (intent) {
2396 ptlrpc_req_finished(req);
2401 rc = osc_enqueue_fini(req, upcall, cookie, &lockh, einfo->ei_mode,
2404 ptlrpc_req_finished(req);
2409 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2410 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
2411 __u64 *flags, void *data, struct lustre_handle *lockh,
2414 struct obd_device *obd = exp->exp_obd;
2415 __u64 lflags = *flags;
2419 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2422 /* Filesystem lock extents are extended to page boundaries so that
2423 * dealing with the page cache is a little smoother */
2424 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
2425 policy->l_extent.end |= ~CFS_PAGE_MASK;
2427 /* Next, search for already existing extent locks that will cover us */
2428 /* If we're trying to read, we also search for an existing PW lock. The
2429 * VFS and page cache already protect us locally, so lots of readers/
2430 * writers can share a single PW lock. */
2434 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2435 res_id, type, policy, rc, lockh, unref);
2438 if (!osc_set_data_with_check(lockh, data)) {
2439 if (!(lflags & LDLM_FL_TEST_LOCK))
2440 ldlm_lock_decref(lockh, rc);
2444 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
2445 ldlm_lock_addref(lockh, LCK_PR);
2446 ldlm_lock_decref(lockh, LCK_PW);
2453 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
2457 if (unlikely(mode == LCK_GROUP))
2458 ldlm_lock_decref_and_cancel(lockh, mode);
2460 ldlm_lock_decref(lockh, mode);
2465 static int osc_statfs_interpret(const struct lu_env *env,
2466 struct ptlrpc_request *req,
2467 struct osc_async_args *aa, int rc)
2469 struct obd_statfs *msfs;
2473 /* The request has in fact never been sent
2474 * due to issues at a higher level (LOV).
2475 * Exit immediately since the caller is
2476 * aware of the problem and takes care
2477 * of the clean up */
2480 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2481 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2487 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2489 GOTO(out, rc = -EPROTO);
2492 *aa->aa_oi->oi_osfs = *msfs;
2494 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2498 static int osc_statfs_async(struct obd_export *exp,
2499 struct obd_info *oinfo, __u64 max_age,
2500 struct ptlrpc_request_set *rqset)
2502 struct obd_device *obd = class_exp2obd(exp);
2503 struct ptlrpc_request *req;
2504 struct osc_async_args *aa;
2508 /* We could possibly pass max_age in the request (as an absolute
2509 * timestamp or a "seconds.usec ago") so the target can avoid doing
2510 * extra calls into the filesystem if that isn't necessary (e.g.
2511 * during mount that would help a bit). Having relative timestamps
2512 * is not so great if request processing is slow, while absolute
2513 * timestamps are not ideal because they need time synchronization. */
2514 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2518 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2520 ptlrpc_request_free(req);
2523 ptlrpc_request_set_replen(req);
2524 req->rq_request_portal = OST_CREATE_PORTAL;
2525 ptlrpc_at_set_req_timeout(req);
2527 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2528 /* procfs requests not want stat in wait for avoid deadlock */
2529 req->rq_no_resend = 1;
2530 req->rq_no_delay = 1;
2533 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2534 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2535 aa = ptlrpc_req_async_args(req);
2538 ptlrpc_set_add_req(rqset, req);
2542 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2543 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
2545 struct obd_device *obd = class_exp2obd(exp);
2546 struct obd_statfs *msfs;
2547 struct ptlrpc_request *req;
2548 struct obd_import *imp = NULL;
2552 /*Since the request might also come from lprocfs, so we need
2553 *sync this with client_disconnect_export Bug15684*/
2554 down_read(&obd->u.cli.cl_sem);
2555 if (obd->u.cli.cl_import)
2556 imp = class_import_get(obd->u.cli.cl_import);
2557 up_read(&obd->u.cli.cl_sem);
2561 /* We could possibly pass max_age in the request (as an absolute
2562 * timestamp or a "seconds.usec ago") so the target can avoid doing
2563 * extra calls into the filesystem if that isn't necessary (e.g.
2564 * during mount that would help a bit). Having relative timestamps
2565 * is not so great if request processing is slow, while absolute
2566 * timestamps are not ideal because they need time synchronization. */
2567 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2569 class_import_put(imp);
2574 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2576 ptlrpc_request_free(req);
2579 ptlrpc_request_set_replen(req);
2580 req->rq_request_portal = OST_CREATE_PORTAL;
2581 ptlrpc_at_set_req_timeout(req);
2583 if (flags & OBD_STATFS_NODELAY) {
2584 /* procfs requests not want stat in wait for avoid deadlock */
2585 req->rq_no_resend = 1;
2586 req->rq_no_delay = 1;
2589 rc = ptlrpc_queue_wait(req);
2593 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2595 GOTO(out, rc = -EPROTO);
2602 ptlrpc_req_finished(req);
2606 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2607 void *karg, void *uarg)
2609 struct obd_device *obd = exp->exp_obd;
2610 struct obd_ioctl_data *data = karg;
2614 if (!try_module_get(THIS_MODULE)) {
2615 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
2616 module_name(THIS_MODULE));
2620 case OBD_IOC_CLIENT_RECOVER:
2621 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2622 data->ioc_inlbuf1, 0);
2626 case IOC_OSC_SET_ACTIVE:
2627 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2630 case OBD_IOC_POLL_QUOTACHECK:
2631 err = osc_quota_poll_check(exp, (struct if_quotacheck *)karg);
2633 case OBD_IOC_PING_TARGET:
2634 err = ptlrpc_obd_ping(obd);
2637 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2638 cmd, current_comm());
2639 GOTO(out, err = -ENOTTY);
2642 module_put(THIS_MODULE);
2646 static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
2647 obd_count keylen, void *key, __u32 *vallen, void *val,
2648 struct lov_stripe_md *lsm)
2651 if (!vallen || !val)
2654 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2655 __u32 *stripe = val;
2656 *vallen = sizeof(*stripe);
2659 } else if (KEY_IS(KEY_LAST_ID)) {
2660 struct ptlrpc_request *req;
2665 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2666 &RQF_OST_GET_INFO_LAST_ID);
2670 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2671 RCL_CLIENT, keylen);
2672 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
2674 ptlrpc_request_free(req);
2678 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2679 memcpy(tmp, key, keylen);
2681 req->rq_no_delay = req->rq_no_resend = 1;
2682 ptlrpc_request_set_replen(req);
2683 rc = ptlrpc_queue_wait(req);
2687 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
2689 GOTO(out, rc = -EPROTO);
2691 *((obd_id *)val) = *reply;
2693 ptlrpc_req_finished(req);
2695 } else if (KEY_IS(KEY_FIEMAP)) {
2696 struct ll_fiemap_info_key *fm_key =
2697 (struct ll_fiemap_info_key *)key;
2698 struct ldlm_res_id res_id;
2699 ldlm_policy_data_t policy;
2700 struct lustre_handle lockh;
2701 ldlm_mode_t mode = 0;
2702 struct ptlrpc_request *req;
2703 struct ll_user_fiemap *reply;
2707 if (!(fm_key->fiemap.fm_flags & FIEMAP_FLAG_SYNC))
2710 policy.l_extent.start = fm_key->fiemap.fm_start &
2713 if (OBD_OBJECT_EOF - fm_key->fiemap.fm_length <=
2714 fm_key->fiemap.fm_start + PAGE_CACHE_SIZE - 1)
2715 policy.l_extent.end = OBD_OBJECT_EOF;
2717 policy.l_extent.end = (fm_key->fiemap.fm_start +
2718 fm_key->fiemap.fm_length +
2719 PAGE_CACHE_SIZE - 1) & CFS_PAGE_MASK;
2721 ostid_build_res_name(&fm_key->oa.o_oi, &res_id);
2722 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
2723 LDLM_FL_BLOCK_GRANTED |
2725 &res_id, LDLM_EXTENT, &policy,
2726 LCK_PR | LCK_PW, &lockh, 0);
2727 if (mode) { /* lock is cached on client */
2728 if (mode != LCK_PR) {
2729 ldlm_lock_addref(&lockh, LCK_PR);
2730 ldlm_lock_decref(&lockh, LCK_PW);
2732 } else { /* no cached lock, needs acquire lock on server side */
2733 fm_key->oa.o_valid |= OBD_MD_FLFLAGS;
2734 fm_key->oa.o_flags |= OBD_FL_SRVLOCK;
2738 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2739 &RQF_OST_GET_INFO_FIEMAP);
2741 GOTO(drop_lock, rc = -ENOMEM);
2743 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
2744 RCL_CLIENT, keylen);
2745 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
2746 RCL_CLIENT, *vallen);
2747 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
2748 RCL_SERVER, *vallen);
2750 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
2752 ptlrpc_request_free(req);
2753 GOTO(drop_lock, rc);
2756 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
2757 memcpy(tmp, key, keylen);
2758 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
2759 memcpy(tmp, val, *vallen);
2761 ptlrpc_request_set_replen(req);
2762 rc = ptlrpc_queue_wait(req);
2766 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
2768 GOTO(fini_req, rc = -EPROTO);
2770 memcpy(val, reply, *vallen);
2772 ptlrpc_req_finished(req);
2775 ldlm_lock_decref(&lockh, LCK_PR);
2782 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
2783 obd_count keylen, void *key, obd_count vallen,
2784 void *val, struct ptlrpc_request_set *set)
2786 struct ptlrpc_request *req;
2787 struct obd_device *obd = exp->exp_obd;
2788 struct obd_import *imp = class_exp2cliimp(exp);
2793 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
2795 if (KEY_IS(KEY_CHECKSUM)) {
2796 if (vallen != sizeof(int))
2798 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
2802 if (KEY_IS(KEY_SPTLRPC_CONF)) {
2803 sptlrpc_conf_client_adapt(obd);
2807 if (KEY_IS(KEY_FLUSH_CTX)) {
2808 sptlrpc_import_flush_my_ctx(imp);
2812 if (KEY_IS(KEY_CACHE_SET)) {
2813 struct client_obd *cli = &obd->u.cli;
2815 LASSERT(cli->cl_cache == NULL); /* only once */
2816 cli->cl_cache = (struct cl_client_cache *)val;
2817 atomic_inc(&cli->cl_cache->ccc_users);
2818 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
2820 /* add this osc into entity list */
2821 LASSERT(list_empty(&cli->cl_lru_osc));
2822 spin_lock(&cli->cl_cache->ccc_lru_lock);
2823 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
2824 spin_unlock(&cli->cl_cache->ccc_lru_lock);
2829 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
2830 struct client_obd *cli = &obd->u.cli;
2831 long nr = atomic_long_read(&cli->cl_lru_in_list) >> 1;
2832 long target = *(long *)val;
2834 nr = osc_lru_shrink(env, cli, min(nr, target), true);
2839 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
2842 /* We pass all other commands directly to OST. Since nobody calls osc
2843 methods directly and everybody is supposed to go through LOV, we
2844 assume lov checked invalid values for us.
2845 The only recognised values so far are evict_by_nid and mds_conn.
2846 Even if something bad goes through, we'd get a -EINVAL from OST
2849 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
2850 &RQF_OST_SET_GRANT_INFO :
2855 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2856 RCL_CLIENT, keylen);
2857 if (!KEY_IS(KEY_GRANT_SHRINK))
2858 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
2859 RCL_CLIENT, vallen);
2860 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
2862 ptlrpc_request_free(req);
2866 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2867 memcpy(tmp, key, keylen);
2868 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
2871 memcpy(tmp, val, vallen);
2873 if (KEY_IS(KEY_GRANT_SHRINK)) {
2874 struct osc_grant_args *aa;
2877 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2878 aa = ptlrpc_req_async_args(req);
2881 ptlrpc_req_finished(req);
2884 *oa = ((struct ost_body *)val)->oa;
2886 req->rq_interpret_reply = osc_shrink_grant_interpret;
2889 ptlrpc_request_set_replen(req);
2890 if (!KEY_IS(KEY_GRANT_SHRINK)) {
2891 LASSERT(set != NULL);
2892 ptlrpc_set_add_req(set, req);
2893 ptlrpc_check_set(NULL, set);
2895 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
2900 static int osc_reconnect(const struct lu_env *env,
2901 struct obd_export *exp, struct obd_device *obd,
2902 struct obd_uuid *cluuid,
2903 struct obd_connect_data *data,
2906 struct client_obd *cli = &obd->u.cli;
2908 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
2911 client_obd_list_lock(&cli->cl_loi_list_lock);
2912 data->ocd_grant = (cli->cl_avail_grant +
2913 (cli->cl_dirty_pages << PAGE_CACHE_SHIFT)) ?:
2914 2 * cli_brw_size(obd);
2915 lost_grant = cli->cl_lost_grant;
2916 cli->cl_lost_grant = 0;
2917 client_obd_list_unlock(&cli->cl_loi_list_lock);
2919 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
2920 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
2921 data->ocd_version, data->ocd_grant, lost_grant);
2927 static int osc_disconnect(struct obd_export *exp)
2929 struct obd_device *obd = class_exp2obd(exp);
2932 rc = client_disconnect_export(exp);
2934 * Initially we put del_shrink_grant before disconnect_export, but it
2935 * causes the following problem if setup (connect) and cleanup
2936 * (disconnect) are tangled together.
2937 * connect p1 disconnect p2
2938 * ptlrpc_connect_import
2939 * ............... class_manual_cleanup
2942 * ptlrpc_connect_interrupt
2944 * add this client to shrink list
2946 * Bang! pinger trigger the shrink.
2947 * So the osc should be disconnected from the shrink list, after we
2948 * are sure the import has been destroyed. BUG18662
2950 if (obd->u.cli.cl_import == NULL)
2951 osc_del_shrink_grant(&obd->u.cli);
2955 static int osc_import_event(struct obd_device *obd,
2956 struct obd_import *imp,
2957 enum obd_import_event event)
2959 struct client_obd *cli;
2963 LASSERT(imp->imp_obd == obd);
2966 case IMP_EVENT_DISCON: {
2968 client_obd_list_lock(&cli->cl_loi_list_lock);
2969 cli->cl_avail_grant = 0;
2970 cli->cl_lost_grant = 0;
2971 client_obd_list_unlock(&cli->cl_loi_list_lock);
2974 case IMP_EVENT_INACTIVE: {
2975 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
2978 case IMP_EVENT_INVALIDATE: {
2979 struct ldlm_namespace *ns = obd->obd_namespace;
2983 env = cl_env_get(&refcheck);
2987 /* all pages go to failing rpcs due to the invalid
2989 osc_io_unplug(env, cli, NULL, PDL_POLICY_ROUND);
2991 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
2992 cl_env_put(env, &refcheck);
2997 case IMP_EVENT_ACTIVE: {
2998 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3001 case IMP_EVENT_OCD: {
3002 struct obd_connect_data *ocd = &imp->imp_connect_data;
3004 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3005 osc_init_grant(&obd->u.cli, ocd);
3008 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3009 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3011 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3014 case IMP_EVENT_DEACTIVATE: {
3015 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
3018 case IMP_EVENT_ACTIVATE: {
3019 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
3023 CERROR("Unknown import event %d\n", event);
3030 * Determine whether the lock can be canceled before replaying the lock
3031 * during recovery, see bug16774 for detailed information.
3033 * \retval zero the lock can't be canceled
3034 * \retval other ok to cancel
3036 static int osc_cancel_weight(struct ldlm_lock *lock)
3039 * Cancel all unused and granted extent lock.
3041 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3042 lock->l_granted_mode == lock->l_req_mode &&
3043 osc_ldlm_weigh_ast(lock) == 0)
3049 static int brw_queue_work(const struct lu_env *env, void *data)
3051 struct client_obd *cli = data;
3053 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3055 osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
3059 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3061 struct client_obd *cli = &obd->u.cli;
3062 struct obd_type *type;
3067 rc = ptlrpcd_addref();
3071 rc = client_obd_setup(obd, lcfg);
3073 GOTO(out_ptlrpcd, rc);
3075 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3076 if (IS_ERR(handler))
3077 GOTO(out_client_setup, rc = PTR_ERR(handler));
3078 cli->cl_writeback_work = handler;
3080 handler = ptlrpcd_alloc_work(cli->cl_import, lru_queue_work, cli);
3081 if (IS_ERR(handler))
3082 GOTO(out_ptlrpcd_work, rc = PTR_ERR(handler));
3083 cli->cl_lru_work = handler;
3085 rc = osc_quota_setup(obd);
3087 GOTO(out_ptlrpcd_work, rc);
3089 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3092 obd->obd_vars = lprocfs_osc_obd_vars;
3094 /* If this is true then both client (osc) and server (osp) are on the
3095 * same node. The osp layer if loaded first will register the osc proc
3096 * directory. In that case this obd_device will be attached its proc
3097 * tree to type->typ_procsym instead of obd->obd_type->typ_procroot. */
3098 type = class_search_type(LUSTRE_OSP_NAME);
3099 if (type && type->typ_procsym) {
3100 obd->obd_proc_entry = lprocfs_seq_register(obd->obd_name,
3102 obd->obd_vars, obd);
3103 if (IS_ERR(obd->obd_proc_entry)) {
3104 rc = PTR_ERR(obd->obd_proc_entry);
3105 CERROR("error %d setting up lprocfs for %s\n", rc,
3107 obd->obd_proc_entry = NULL;
3110 rc = lprocfs_obd_setup(obd);
3113 /* If the basic OSC proc tree construction succeeded then
3114 * lets do the rest. */
3116 lproc_osc_attach_seqstat(obd);
3117 sptlrpc_lprocfs_cliobd_attach(obd);
3118 ptlrpc_lprocfs_register_obd(obd);
3121 /* We need to allocate a few requests more, because
3122 * brw_interpret tries to create new requests before freeing
3123 * previous ones, Ideally we want to have 2x max_rpcs_in_flight
3124 * reserved, but I'm afraid that might be too much wasted RAM
3125 * in fact, so 2 is just my guess and still should work. */
3126 cli->cl_import->imp_rq_pool =
3127 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3129 ptlrpc_add_rqs_to_pool);
3131 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
3132 ns_register_cancel(obd->obd_namespace, osc_cancel_weight);
3136 if (cli->cl_writeback_work != NULL) {
3137 ptlrpcd_destroy_work(cli->cl_writeback_work);
3138 cli->cl_writeback_work = NULL;
3140 if (cli->cl_lru_work != NULL) {
3141 ptlrpcd_destroy_work(cli->cl_lru_work);
3142 cli->cl_lru_work = NULL;
3145 client_obd_cleanup(obd);
3151 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3157 case OBD_CLEANUP_EARLY: {
3158 struct obd_import *imp;
3159 imp = obd->u.cli.cl_import;
3160 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3161 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3162 ptlrpc_deactivate_import(imp);
3163 spin_lock(&imp->imp_lock);
3164 imp->imp_pingable = 0;
3165 spin_unlock(&imp->imp_lock);
3168 case OBD_CLEANUP_EXPORTS: {
3169 struct client_obd *cli = &obd->u.cli;
3171 * for echo client, export may be on zombie list, wait for
3172 * zombie thread to cull it, because cli.cl_import will be
3173 * cleared in client_disconnect_export():
3174 * class_export_destroy() -> obd_cleanup() ->
3175 * echo_device_free() -> echo_client_cleanup() ->
3176 * obd_disconnect() -> osc_disconnect() ->
3177 * client_disconnect_export()
3179 obd_zombie_barrier();
3180 if (cli->cl_writeback_work) {
3181 ptlrpcd_destroy_work(cli->cl_writeback_work);
3182 cli->cl_writeback_work = NULL;
3184 if (cli->cl_lru_work) {
3185 ptlrpcd_destroy_work(cli->cl_lru_work);
3186 cli->cl_lru_work = NULL;
3188 obd_cleanup_client_import(obd);
3189 ptlrpc_lprocfs_unregister_obd(obd);
3190 lprocfs_obd_cleanup(obd);
3197 int osc_cleanup(struct obd_device *obd)
3199 struct client_obd *cli = &obd->u.cli;
3205 if (cli->cl_cache != NULL) {
3206 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3207 spin_lock(&cli->cl_cache->ccc_lru_lock);
3208 list_del_init(&cli->cl_lru_osc);
3209 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3210 cli->cl_lru_left = NULL;
3211 atomic_dec(&cli->cl_cache->ccc_users);
3212 cli->cl_cache = NULL;
3215 /* free memory of osc quota cache */
3216 osc_quota_cleanup(obd);
3218 rc = client_obd_cleanup(obd);
3224 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3226 int rc = class_process_proc_param(PARAM_OSC, obd->obd_vars, lcfg, obd);
3227 return rc > 0 ? 0: rc;
3230 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
3232 return osc_process_config_base(obd, buf);
3235 struct obd_ops osc_obd_ops = {
3236 .o_owner = THIS_MODULE,
3237 .o_setup = osc_setup,
3238 .o_precleanup = osc_precleanup,
3239 .o_cleanup = osc_cleanup,
3240 .o_add_conn = client_import_add_conn,
3241 .o_del_conn = client_import_del_conn,
3242 .o_connect = client_connect_import,
3243 .o_reconnect = osc_reconnect,
3244 .o_disconnect = osc_disconnect,
3245 .o_statfs = osc_statfs,
3246 .o_statfs_async = osc_statfs_async,
3247 .o_unpackmd = osc_unpackmd,
3248 .o_create = osc_create,
3249 .o_destroy = osc_destroy,
3250 .o_getattr = osc_getattr,
3251 .o_getattr_async = osc_getattr_async,
3252 .o_setattr = osc_setattr,
3253 .o_setattr_async = osc_setattr_async,
3254 .o_change_cbdata = osc_change_cbdata,
3255 .o_find_cbdata = osc_find_cbdata,
3256 .o_iocontrol = osc_iocontrol,
3257 .o_get_info = osc_get_info,
3258 .o_set_info_async = osc_set_info_async,
3259 .o_import_event = osc_import_event,
3260 .o_process_config = osc_process_config,
3261 .o_quotactl = osc_quotactl,
3262 .o_quotacheck = osc_quotacheck,
3265 extern struct lu_kmem_descr osc_caches[];
3266 extern struct lock_class_key osc_ast_guard_class;
3268 int __init osc_init(void)
3270 bool enable_proc = true;
3271 struct obd_type *type;
3275 /* print an address of _any_ initialized kernel symbol from this
3276 * module, to allow debugging with gdb that doesn't support data
3277 * symbols from modules.*/
3278 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3280 rc = lu_kmem_init(osc_caches);
3284 type = class_search_type(LUSTRE_OSP_NAME);
3285 if (type != NULL && type->typ_procsym != NULL)
3286 enable_proc = false;
3288 rc = class_register_type(&osc_obd_ops, NULL, enable_proc, NULL,
3289 LUSTRE_OSC_NAME, &osc_device_type);
3291 lu_kmem_fini(osc_caches);
3298 static void /*__exit*/ osc_exit(void)
3300 class_unregister_type(LUSTRE_OSC_NAME);
3301 lu_kmem_fini(osc_caches);
3304 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3305 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3306 MODULE_LICENSE("GPL");
3308 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);