1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
41 # define EXPORT_SYMTAB
43 #define DEBUG_SUBSYSTEM S_OSC
45 #include <libcfs/libcfs.h>
48 # include <liblustre.h>
51 #include <lustre_dlm.h>
52 #include <lustre_net.h>
53 #include <lustre/lustre_user.h>
54 #include <obd_cksum.h>
62 #include <lustre_ha.h>
63 #include <lprocfs_status.h>
64 #include <lustre_log.h>
65 #include <lustre_debug.h>
66 #include <lustre_param.h>
67 #include "osc_internal.h"
69 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
70 static int brw_interpret(const struct lu_env *env,
71 struct ptlrpc_request *req, void *data, int rc);
72 static void osc_check_rpcs0(const struct lu_env *env, struct client_obd *cli,
74 int osc_cleanup(struct obd_device *obd);
76 /* Pack OSC object metadata for disk storage (LE byte order). */
77 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
78 struct lov_stripe_md *lsm)
83 lmm_size = sizeof(**lmmp);
88 OBD_FREE(*lmmp, lmm_size);
94 OBD_ALLOC(*lmmp, lmm_size);
100 LASSERT(lsm->lsm_object_id);
101 LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
102 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
103 (*lmmp)->lmm_object_seq = cpu_to_le64(lsm->lsm_object_seq);
109 /* Unpack OSC object metadata from disk storage (LE byte order). */
110 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
111 struct lov_mds_md *lmm, int lmm_bytes)
114 struct obd_import *imp = class_exp2cliimp(exp);
118 if (lmm_bytes < sizeof (*lmm)) {
119 CERROR("lov_mds_md too small: %d, need %d\n",
120 lmm_bytes, (int)sizeof(*lmm));
123 /* XXX LOV_MAGIC etc check? */
125 if (lmm->lmm_object_id == 0) {
126 CERROR("lov_mds_md: zero lmm_object_id\n");
131 lsm_size = lov_stripe_md_size(1);
135 if (*lsmp != NULL && lmm == NULL) {
136 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
137 OBD_FREE(*lsmp, lsm_size);
143 OBD_ALLOC(*lsmp, lsm_size);
146 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
147 if ((*lsmp)->lsm_oinfo[0] == NULL) {
148 OBD_FREE(*lsmp, lsm_size);
151 loi_init((*lsmp)->lsm_oinfo[0]);
155 /* XXX zero *lsmp? */
156 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
157 (*lsmp)->lsm_object_seq = le64_to_cpu (lmm->lmm_object_seq);
158 LASSERT((*lsmp)->lsm_object_id);
159 LASSERT_SEQ_IS_MDT((*lsmp)->lsm_object_seq);
163 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
164 (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
166 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
171 static inline void osc_pack_capa(struct ptlrpc_request *req,
172 struct ost_body *body, void *capa)
174 struct obd_capa *oc = (struct obd_capa *)capa;
175 struct lustre_capa *c;
180 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
183 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
184 DEBUG_CAPA(D_SEC, c, "pack");
187 static inline void osc_pack_req_body(struct ptlrpc_request *req,
188 struct obd_info *oinfo)
190 struct ost_body *body;
192 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
195 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
196 osc_pack_capa(req, body, oinfo->oi_capa);
199 static inline void osc_set_capa_size(struct ptlrpc_request *req,
200 const struct req_msg_field *field,
204 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
206 /* it is already calculated as sizeof struct obd_capa */
210 static int osc_getattr_interpret(const struct lu_env *env,
211 struct ptlrpc_request *req,
212 struct osc_async_args *aa, int rc)
214 struct ost_body *body;
220 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
222 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
223 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
225 /* This should really be sent by the OST */
226 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
227 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
229 CDEBUG(D_INFO, "can't unpack ost_body\n");
231 aa->aa_oi->oi_oa->o_valid = 0;
234 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
238 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
239 struct ptlrpc_request_set *set)
241 struct ptlrpc_request *req;
242 struct osc_async_args *aa;
246 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
250 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
251 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
253 ptlrpc_request_free(req);
257 osc_pack_req_body(req, oinfo);
259 ptlrpc_request_set_replen(req);
260 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
262 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
263 aa = ptlrpc_req_async_args(req);
266 ptlrpc_set_add_req(set, req);
270 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
272 struct ptlrpc_request *req;
273 struct ost_body *body;
277 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
281 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
282 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
284 ptlrpc_request_free(req);
288 osc_pack_req_body(req, oinfo);
290 ptlrpc_request_set_replen(req);
292 rc = ptlrpc_queue_wait(req);
296 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
298 GOTO(out, rc = -EPROTO);
300 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
301 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
303 /* This should really be sent by the OST */
304 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
305 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
309 ptlrpc_req_finished(req);
313 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
314 struct obd_trans_info *oti)
316 struct ptlrpc_request *req;
317 struct ost_body *body;
321 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
323 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
327 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
328 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
330 ptlrpc_request_free(req);
334 osc_pack_req_body(req, oinfo);
336 ptlrpc_request_set_replen(req);
338 rc = ptlrpc_queue_wait(req);
342 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
344 GOTO(out, rc = -EPROTO);
346 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
350 ptlrpc_req_finished(req);
354 static int osc_setattr_interpret(const struct lu_env *env,
355 struct ptlrpc_request *req,
356 struct osc_setattr_args *sa, int rc)
358 struct ost_body *body;
364 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
366 GOTO(out, rc = -EPROTO);
368 lustre_get_wire_obdo(sa->sa_oa, &body->oa);
370 rc = sa->sa_upcall(sa->sa_cookie, rc);
374 int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
375 struct obd_trans_info *oti,
376 obd_enqueue_update_f upcall, void *cookie,
377 struct ptlrpc_request_set *rqset)
379 struct ptlrpc_request *req;
380 struct osc_setattr_args *sa;
384 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
388 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
389 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
391 ptlrpc_request_free(req);
395 if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
396 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
398 osc_pack_req_body(req, oinfo);
400 ptlrpc_request_set_replen(req);
402 /* do mds to ost setattr asynchronously */
404 /* Do not wait for response. */
405 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
407 req->rq_interpret_reply =
408 (ptlrpc_interpterer_t)osc_setattr_interpret;
410 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
411 sa = ptlrpc_req_async_args(req);
412 sa->sa_oa = oinfo->oi_oa;
413 sa->sa_upcall = upcall;
414 sa->sa_cookie = cookie;
416 if (rqset == PTLRPCD_SET)
417 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
419 ptlrpc_set_add_req(rqset, req);
425 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
426 struct obd_trans_info *oti,
427 struct ptlrpc_request_set *rqset)
429 return osc_setattr_async_base(exp, oinfo, oti,
430 oinfo->oi_cb_up, oinfo, rqset);
433 int osc_real_create(struct obd_export *exp, struct obdo *oa,
434 struct lov_stripe_md **ea, struct obd_trans_info *oti)
436 struct ptlrpc_request *req;
437 struct ost_body *body;
438 struct lov_stripe_md *lsm;
447 rc = obd_alloc_memmd(exp, &lsm);
452 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
454 GOTO(out, rc = -ENOMEM);
456 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
458 ptlrpc_request_free(req);
462 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
464 lustre_set_wire_obdo(&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 lustre_get_wire_obdo(oa, &body->oa);
486 /* This should really be sent by the OST */
487 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
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_object_id = oa->o_id;
495 lsm->lsm_object_seq = oa->o_seq;
499 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
501 if (oa->o_valid & OBD_MD_FLCOOKIE) {
502 if (!oti->oti_logcookies)
503 oti_alloc_cookies(oti, 1);
504 *oti->oti_logcookies = oa->o_lcookie;
508 CDEBUG(D_HA, "transno: "LPD64"\n",
509 lustre_msg_get_transno(req->rq_repmsg));
511 ptlrpc_req_finished(req);
514 obd_free_memmd(exp, &lsm);
518 int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
519 obd_enqueue_update_f upcall, void *cookie,
520 struct ptlrpc_request_set *rqset)
522 struct ptlrpc_request *req;
523 struct osc_setattr_args *sa;
524 struct ost_body *body;
528 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
532 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
533 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
535 ptlrpc_request_free(req);
538 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
539 ptlrpc_at_set_req_timeout(req);
541 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
543 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
544 osc_pack_capa(req, body, oinfo->oi_capa);
546 ptlrpc_request_set_replen(req);
549 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
550 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
551 sa = ptlrpc_req_async_args(req);
552 sa->sa_oa = oinfo->oi_oa;
553 sa->sa_upcall = upcall;
554 sa->sa_cookie = cookie;
555 if (rqset == PTLRPCD_SET)
556 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
558 ptlrpc_set_add_req(rqset, req);
563 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
564 struct obd_trans_info *oti,
565 struct ptlrpc_request_set *rqset)
567 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
568 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
569 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
570 return osc_punch_base(exp, oinfo,
571 oinfo->oi_cb_up, oinfo, rqset);
574 static int osc_sync_interpret(const struct lu_env *env,
575 struct ptlrpc_request *req,
578 struct osc_async_args *aa = arg;
579 struct ost_body *body;
585 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
587 CERROR ("can't unpack ost_body\n");
588 GOTO(out, rc = -EPROTO);
591 *aa->aa_oi->oi_oa = body->oa;
593 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
597 static int osc_sync(struct obd_export *exp, struct obd_info *oinfo,
598 obd_size start, obd_size end,
599 struct ptlrpc_request_set *set)
601 struct ptlrpc_request *req;
602 struct ost_body *body;
603 struct osc_async_args *aa;
608 CDEBUG(D_INFO, "oa NULL\n");
612 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
616 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
617 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
619 ptlrpc_request_free(req);
623 /* overload the size and blocks fields in the oa with start/end */
624 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
626 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
627 body->oa.o_size = start;
628 body->oa.o_blocks = end;
629 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
630 osc_pack_capa(req, body, oinfo->oi_capa);
632 ptlrpc_request_set_replen(req);
633 req->rq_interpret_reply = osc_sync_interpret;
635 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
636 aa = ptlrpc_req_async_args(req);
639 ptlrpc_set_add_req(set, req);
643 /* Find and cancel locally locks matched by @mode in the resource found by
644 * @objid. Found locks are added into @cancel list. Returns the amount of
645 * locks added to @cancels list. */
646 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
648 ldlm_mode_t mode, int lock_flags)
650 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
651 struct ldlm_res_id res_id;
652 struct ldlm_resource *res;
656 osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
657 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
661 LDLM_RESOURCE_ADDREF(res);
662 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
663 lock_flags, 0, NULL);
664 LDLM_RESOURCE_DELREF(res);
665 ldlm_resource_putref(res);
669 static int osc_destroy_interpret(const struct lu_env *env,
670 struct ptlrpc_request *req, void *data,
673 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
675 cfs_atomic_dec(&cli->cl_destroy_in_flight);
676 cfs_waitq_signal(&cli->cl_destroy_waitq);
680 static int osc_can_send_destroy(struct client_obd *cli)
682 if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
683 cli->cl_max_rpcs_in_flight) {
684 /* The destroy request can be sent */
687 if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
688 cli->cl_max_rpcs_in_flight) {
690 * The counter has been modified between the two atomic
693 cfs_waitq_signal(&cli->cl_destroy_waitq);
698 /* Destroy requests can be async always on the client, and we don't even really
699 * care about the return code since the client cannot do anything at all about
701 * When the MDS is unlinking a filename, it saves the file objects into a
702 * recovery llog, and these object records are cancelled when the OST reports
703 * they were destroyed and sync'd to disk (i.e. transaction committed).
704 * If the client dies, or the OST is down when the object should be destroyed,
705 * the records are not cancelled, and when the OST reconnects to the MDS next,
706 * it will retrieve the llog unlink logs and then sends the log cancellation
707 * cookies to the MDS after committing destroy transactions. */
708 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
709 struct lov_stripe_md *ea, struct obd_trans_info *oti,
710 struct obd_export *md_export, void *capa)
712 struct client_obd *cli = &exp->exp_obd->u.cli;
713 struct ptlrpc_request *req;
714 struct ost_body *body;
715 CFS_LIST_HEAD(cancels);
720 CDEBUG(D_INFO, "oa NULL\n");
724 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
725 LDLM_FL_DISCARD_DATA);
727 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
729 ldlm_lock_list_put(&cancels, l_bl_ast, count);
733 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
734 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
737 ptlrpc_request_free(req);
741 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
742 ptlrpc_at_set_req_timeout(req);
744 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
745 oa->o_lcookie = *oti->oti_logcookies;
746 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
748 lustre_set_wire_obdo(&body->oa, oa);
750 osc_pack_capa(req, body, (struct obd_capa *)capa);
751 ptlrpc_request_set_replen(req);
753 /* don't throttle destroy RPCs for the MDT */
754 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
755 req->rq_interpret_reply = osc_destroy_interpret;
756 if (!osc_can_send_destroy(cli)) {
757 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
761 * Wait until the number of on-going destroy RPCs drops
762 * under max_rpc_in_flight
764 l_wait_event_exclusive(cli->cl_destroy_waitq,
765 osc_can_send_destroy(cli), &lwi);
769 /* Do not wait for response */
770 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
774 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
777 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
779 LASSERT(!(oa->o_valid & bits));
782 client_obd_list_lock(&cli->cl_loi_list_lock);
783 oa->o_dirty = cli->cl_dirty;
784 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
785 CERROR("dirty %lu - %lu > dirty_max %lu\n",
786 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
788 } else if (cfs_atomic_read(&obd_dirty_pages) -
789 cfs_atomic_read(&obd_dirty_transit_pages) >
790 obd_max_dirty_pages + 1){
791 /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
792 * not covered by a lock thus they may safely race and trip
793 * this CERROR() unless we add in a small fudge factor (+1). */
794 CERROR("dirty %d - %d > system dirty_max %d\n",
795 cfs_atomic_read(&obd_dirty_pages),
796 cfs_atomic_read(&obd_dirty_transit_pages),
797 obd_max_dirty_pages);
799 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
800 CERROR("dirty %lu - dirty_max %lu too big???\n",
801 cli->cl_dirty, cli->cl_dirty_max);
804 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
805 (cli->cl_max_rpcs_in_flight + 1);
806 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
808 oa->o_grant = cli->cl_avail_grant;
809 oa->o_dropped = cli->cl_lost_grant;
810 cli->cl_lost_grant = 0;
811 client_obd_list_unlock(&cli->cl_loi_list_lock);
812 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
813 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
817 static void osc_update_next_shrink(struct client_obd *cli)
819 cli->cl_next_shrink_grant =
820 cfs_time_shift(cli->cl_grant_shrink_interval);
821 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
822 cli->cl_next_shrink_grant);
825 /* caller must hold loi_list_lock */
826 static void osc_consume_write_grant(struct client_obd *cli,
827 struct brw_page *pga)
829 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
830 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
831 cfs_atomic_inc(&obd_dirty_pages);
832 cli->cl_dirty += CFS_PAGE_SIZE;
833 cli->cl_avail_grant -= CFS_PAGE_SIZE;
834 pga->flag |= OBD_BRW_FROM_GRANT;
835 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
836 CFS_PAGE_SIZE, pga, pga->pg);
837 LASSERT(cli->cl_avail_grant >= 0);
838 osc_update_next_shrink(cli);
841 /* the companion to osc_consume_write_grant, called when a brw has completed.
842 * must be called with the loi lock held. */
843 static void osc_release_write_grant(struct client_obd *cli,
844 struct brw_page *pga, int sent)
846 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
849 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
850 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
855 pga->flag &= ~OBD_BRW_FROM_GRANT;
856 cfs_atomic_dec(&obd_dirty_pages);
857 cli->cl_dirty -= CFS_PAGE_SIZE;
858 if (pga->flag & OBD_BRW_NOCACHE) {
859 pga->flag &= ~OBD_BRW_NOCACHE;
860 cfs_atomic_dec(&obd_dirty_transit_pages);
861 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
864 /* Reclaim grant from truncated pages. This is used to solve
865 * write-truncate and grant all gone(to lost_grant) problem.
866 * For a vfs write this problem can be easily solved by a sync
867 * write, however, this is not an option for page_mkwrite()
868 * because grant has to be allocated before a page becomes
870 if (cli->cl_avail_grant < PTLRPC_MAX_BRW_SIZE)
871 cli->cl_avail_grant += CFS_PAGE_SIZE;
873 cli->cl_lost_grant += CFS_PAGE_SIZE;
874 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
875 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
876 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
877 /* For short writes we shouldn't count parts of pages that
878 * span a whole block on the OST side, or our accounting goes
879 * wrong. Should match the code in filter_grant_check. */
880 int offset = pga->off & ~CFS_PAGE_MASK;
881 int count = pga->count + (offset & (blocksize - 1));
882 int end = (offset + pga->count) & (blocksize - 1);
884 count += blocksize - end;
886 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
887 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
888 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
889 cli->cl_avail_grant, cli->cl_dirty);
895 static unsigned long rpcs_in_flight(struct client_obd *cli)
897 return cli->cl_r_in_flight + cli->cl_w_in_flight;
900 /* caller must hold loi_list_lock */
901 void osc_wake_cache_waiters(struct client_obd *cli)
904 struct osc_cache_waiter *ocw;
907 cfs_list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
908 /* if we can't dirty more, we must wait until some is written */
909 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
910 (cfs_atomic_read(&obd_dirty_pages) + 1 >
911 obd_max_dirty_pages)) {
912 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
913 "osc max %ld, sys max %d\n", cli->cl_dirty,
914 cli->cl_dirty_max, obd_max_dirty_pages);
918 /* if still dirty cache but no grant wait for pending RPCs that
919 * may yet return us some grant before doing sync writes */
920 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
921 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
922 cli->cl_w_in_flight);
926 ocw = cfs_list_entry(l, struct osc_cache_waiter, ocw_entry);
927 cfs_list_del_init(&ocw->ocw_entry);
928 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
929 /* no more RPCs in flight to return grant, do sync IO */
930 ocw->ocw_rc = -EDQUOT;
931 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
933 osc_consume_write_grant(cli,
934 &ocw->ocw_oap->oap_brw_page);
937 CDEBUG(D_CACHE, "wake up %p for oap %p, avail grant %ld\n",
938 ocw, ocw->ocw_oap, cli->cl_avail_grant);
940 cfs_waitq_signal(&ocw->ocw_waitq);
946 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
948 client_obd_list_lock(&cli->cl_loi_list_lock);
949 cli->cl_avail_grant += grant;
950 client_obd_list_unlock(&cli->cl_loi_list_lock);
953 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
955 if (body->oa.o_valid & OBD_MD_FLGRANT) {
956 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
957 __osc_update_grant(cli, body->oa.o_grant);
961 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
962 void *key, obd_count vallen, void *val,
963 struct ptlrpc_request_set *set);
965 static int osc_shrink_grant_interpret(const struct lu_env *env,
966 struct ptlrpc_request *req,
969 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
970 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
971 struct ost_body *body;
974 __osc_update_grant(cli, oa->o_grant);
978 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
980 osc_update_grant(cli, body);
986 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
988 client_obd_list_lock(&cli->cl_loi_list_lock);
989 oa->o_grant = cli->cl_avail_grant / 4;
990 cli->cl_avail_grant -= oa->o_grant;
991 client_obd_list_unlock(&cli->cl_loi_list_lock);
992 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
993 oa->o_valid |= OBD_MD_FLFLAGS;
996 oa->o_flags |= OBD_FL_SHRINK_GRANT;
997 osc_update_next_shrink(cli);
1000 /* Shrink the current grant, either from some large amount to enough for a
1001 * full set of in-flight RPCs, or if we have already shrunk to that limit
1002 * then to enough for a single RPC. This avoids keeping more grant than
1003 * needed, and avoids shrinking the grant piecemeal. */
1004 static int osc_shrink_grant(struct client_obd *cli)
1006 long target = (cli->cl_max_rpcs_in_flight + 1) *
1007 cli->cl_max_pages_per_rpc;
1009 client_obd_list_lock(&cli->cl_loi_list_lock);
1010 if (cli->cl_avail_grant <= target)
1011 target = cli->cl_max_pages_per_rpc;
1012 client_obd_list_unlock(&cli->cl_loi_list_lock);
1014 return osc_shrink_grant_to_target(cli, target);
1017 int osc_shrink_grant_to_target(struct client_obd *cli, long target)
1020 struct ost_body *body;
1023 client_obd_list_lock(&cli->cl_loi_list_lock);
1024 /* Don't shrink if we are already above or below the desired limit
1025 * We don't want to shrink below a single RPC, as that will negatively
1026 * impact block allocation and long-term performance. */
1027 if (target < cli->cl_max_pages_per_rpc)
1028 target = cli->cl_max_pages_per_rpc;
1030 if (target >= cli->cl_avail_grant) {
1031 client_obd_list_unlock(&cli->cl_loi_list_lock);
1034 client_obd_list_unlock(&cli->cl_loi_list_lock);
1036 OBD_ALLOC_PTR(body);
1040 osc_announce_cached(cli, &body->oa, 0);
1042 client_obd_list_lock(&cli->cl_loi_list_lock);
1043 body->oa.o_grant = cli->cl_avail_grant - target;
1044 cli->cl_avail_grant = target;
1045 client_obd_list_unlock(&cli->cl_loi_list_lock);
1046 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
1047 body->oa.o_valid |= OBD_MD_FLFLAGS;
1048 body->oa.o_flags = 0;
1050 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
1051 osc_update_next_shrink(cli);
1053 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
1054 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
1055 sizeof(*body), body, NULL);
1057 __osc_update_grant(cli, body->oa.o_grant);
1062 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
1063 static int osc_should_shrink_grant(struct client_obd *client)
1065 cfs_time_t time = cfs_time_current();
1066 cfs_time_t next_shrink = client->cl_next_shrink_grant;
1068 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
1069 OBD_CONNECT_GRANT_SHRINK) == 0)
1072 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
1073 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
1074 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
1077 osc_update_next_shrink(client);
1082 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1084 struct client_obd *client;
1086 cfs_list_for_each_entry(client, &item->ti_obd_list,
1087 cl_grant_shrink_list) {
1088 if (osc_should_shrink_grant(client))
1089 osc_shrink_grant(client);
1094 static int osc_add_shrink_grant(struct client_obd *client)
1098 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1100 osc_grant_shrink_grant_cb, NULL,
1101 &client->cl_grant_shrink_list);
1103 CERROR("add grant client %s error %d\n",
1104 client->cl_import->imp_obd->obd_name, rc);
1107 CDEBUG(D_CACHE, "add grant client %s \n",
1108 client->cl_import->imp_obd->obd_name);
1109 osc_update_next_shrink(client);
1113 static int osc_del_shrink_grant(struct client_obd *client)
1115 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1119 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1122 * ocd_grant is the total grant amount we're expect to hold: if we've
1123 * been evicted, it's the new avail_grant amount, cl_dirty will drop
1124 * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
1126 * race is tolerable here: if we're evicted, but imp_state already
1127 * left EVICTED state, then cl_dirty must be 0 already.
1129 client_obd_list_lock(&cli->cl_loi_list_lock);
1130 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1131 cli->cl_avail_grant = ocd->ocd_grant;
1133 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
1135 if (cli->cl_avail_grant < 0) {
1136 CWARN("%s: available grant < 0, the OSS is probably not running"
1137 " with patch from bug20278 (%ld) \n",
1138 cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant);
1139 /* workaround for 1.6 servers which do not have
1140 * the patch from bug20278 */
1141 cli->cl_avail_grant = ocd->ocd_grant;
1144 client_obd_list_unlock(&cli->cl_loi_list_lock);
1146 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1147 cli->cl_import->imp_obd->obd_name,
1148 cli->cl_avail_grant, cli->cl_lost_grant);
1150 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1151 cfs_list_empty(&cli->cl_grant_shrink_list))
1152 osc_add_shrink_grant(cli);
1155 /* We assume that the reason this OSC got a short read is because it read
1156 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1157 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1158 * this stripe never got written at or beyond this stripe offset yet. */
1159 static void handle_short_read(int nob_read, obd_count page_count,
1160 struct brw_page **pga)
1165 /* skip bytes read OK */
1166 while (nob_read > 0) {
1167 LASSERT (page_count > 0);
1169 if (pga[i]->count > nob_read) {
1170 /* EOF inside this page */
1171 ptr = cfs_kmap(pga[i]->pg) +
1172 (pga[i]->off & ~CFS_PAGE_MASK);
1173 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1174 cfs_kunmap(pga[i]->pg);
1180 nob_read -= pga[i]->count;
1185 /* zero remaining pages */
1186 while (page_count-- > 0) {
1187 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1188 memset(ptr, 0, pga[i]->count);
1189 cfs_kunmap(pga[i]->pg);
1194 static int check_write_rcs(struct ptlrpc_request *req,
1195 int requested_nob, int niocount,
1196 obd_count page_count, struct brw_page **pga)
1201 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1202 sizeof(*remote_rcs) *
1204 if (remote_rcs == NULL) {
1205 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1209 /* return error if any niobuf was in error */
1210 for (i = 0; i < niocount; i++) {
1211 if ((int)remote_rcs[i] < 0)
1212 return(remote_rcs[i]);
1214 if (remote_rcs[i] != 0) {
1215 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1216 i, remote_rcs[i], req);
1221 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1222 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1223 req->rq_bulk->bd_nob_transferred, requested_nob);
1230 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1232 if (p1->flag != p2->flag) {
1233 unsigned mask = ~(OBD_BRW_FROM_GRANT| OBD_BRW_NOCACHE|
1234 OBD_BRW_SYNC|OBD_BRW_ASYNC|OBD_BRW_NOQUOTA);
1236 /* warn if we try to combine flags that we don't know to be
1237 * safe to combine */
1238 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1239 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1240 "report this at http://bugs.whamcloud.com/\n",
1241 p1->flag, p2->flag);
1246 return (p1->off + p1->count == p2->off);
1249 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1250 struct brw_page **pga, int opc,
1251 cksum_type_t cksum_type)
1256 LASSERT (pg_count > 0);
1257 cksum = init_checksum(cksum_type);
1258 while (nob > 0 && pg_count > 0) {
1259 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1260 int off = pga[i]->off & ~CFS_PAGE_MASK;
1261 int count = pga[i]->count > nob ? nob : pga[i]->count;
1263 /* corrupt the data before we compute the checksum, to
1264 * simulate an OST->client data error */
1265 if (i == 0 && opc == OST_READ &&
1266 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1267 memcpy(ptr + off, "bad1", min(4, nob));
1268 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1269 cfs_kunmap(pga[i]->pg);
1270 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1273 nob -= pga[i]->count;
1277 /* For sending we only compute the wrong checksum instead
1278 * of corrupting the data so it is still correct on a redo */
1279 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1282 return fini_checksum(cksum, cksum_type);
1285 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1286 struct lov_stripe_md *lsm, obd_count page_count,
1287 struct brw_page **pga,
1288 struct ptlrpc_request **reqp,
1289 struct obd_capa *ocapa, int reserve,
1292 struct ptlrpc_request *req;
1293 struct ptlrpc_bulk_desc *desc;
1294 struct ost_body *body;
1295 struct obd_ioobj *ioobj;
1296 struct niobuf_remote *niobuf;
1297 int niocount, i, requested_nob, opc, rc;
1298 struct osc_brw_async_args *aa;
1299 struct req_capsule *pill;
1300 struct brw_page *pg_prev;
1303 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1304 RETURN(-ENOMEM); /* Recoverable */
1305 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1306 RETURN(-EINVAL); /* Fatal */
1308 if ((cmd & OBD_BRW_WRITE) != 0) {
1310 req = ptlrpc_request_alloc_pool(cli->cl_import,
1311 cli->cl_import->imp_rq_pool,
1312 &RQF_OST_BRW_WRITE);
1315 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1320 for (niocount = i = 1; i < page_count; i++) {
1321 if (!can_merge_pages(pga[i - 1], pga[i]))
1325 pill = &req->rq_pill;
1326 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1328 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1329 niocount * sizeof(*niobuf));
1330 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1332 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1334 ptlrpc_request_free(req);
1337 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1338 ptlrpc_at_set_req_timeout(req);
1340 if (opc == OST_WRITE)
1341 desc = ptlrpc_prep_bulk_imp(req, page_count,
1342 BULK_GET_SOURCE, OST_BULK_PORTAL);
1344 desc = ptlrpc_prep_bulk_imp(req, page_count,
1345 BULK_PUT_SINK, OST_BULK_PORTAL);
1348 GOTO(out, rc = -ENOMEM);
1349 /* NB request now owns desc and will free it when it gets freed */
1351 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1352 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1353 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1354 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1356 lustre_set_wire_obdo(&body->oa, oa);
1358 obdo_to_ioobj(oa, ioobj);
1359 ioobj->ioo_bufcnt = niocount;
1360 osc_pack_capa(req, body, ocapa);
1361 LASSERT (page_count > 0);
1363 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1364 struct brw_page *pg = pga[i];
1365 int poff = pg->off & ~CFS_PAGE_MASK;
1367 LASSERT(pg->count > 0);
1368 /* make sure there is no gap in the middle of page array */
1369 LASSERTF(page_count == 1 ||
1370 (ergo(i == 0, poff + pg->count == CFS_PAGE_SIZE) &&
1371 ergo(i > 0 && i < page_count - 1,
1372 poff == 0 && pg->count == CFS_PAGE_SIZE) &&
1373 ergo(i == page_count - 1, poff == 0)),
1374 "i: %d/%d pg: %p off: "LPU64", count: %u\n",
1375 i, page_count, pg, pg->off, pg->count);
1377 LASSERTF(i == 0 || pg->off > pg_prev->off,
1378 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1379 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1381 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1382 pg_prev->pg, page_private(pg_prev->pg),
1383 pg_prev->pg->index, pg_prev->off);
1385 LASSERTF(i == 0 || pg->off > pg_prev->off,
1386 "i %d p_c %u\n", i, page_count);
1388 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1389 (pg->flag & OBD_BRW_SRVLOCK));
1391 ptlrpc_prep_bulk_page(desc, pg->pg, poff, pg->count);
1392 requested_nob += pg->count;
1394 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1396 niobuf->len += pg->count;
1398 niobuf->offset = pg->off;
1399 niobuf->len = pg->count;
1400 niobuf->flags = pg->flag;
1405 LASSERTF((void *)(niobuf - niocount) ==
1406 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1407 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1408 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1410 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1412 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1413 body->oa.o_valid |= OBD_MD_FLFLAGS;
1414 body->oa.o_flags = 0;
1416 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1419 if (osc_should_shrink_grant(cli))
1420 osc_shrink_grant_local(cli, &body->oa);
1422 /* size[REQ_REC_OFF] still sizeof (*body) */
1423 if (opc == OST_WRITE) {
1424 if (unlikely(cli->cl_checksum) &&
1425 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1426 /* store cl_cksum_type in a local variable since
1427 * it can be changed via lprocfs */
1428 cksum_type_t cksum_type = cli->cl_cksum_type;
1430 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1431 oa->o_flags &= OBD_FL_LOCAL_MASK;
1432 body->oa.o_flags = 0;
1434 body->oa.o_flags |= cksum_type_pack(cksum_type);
1435 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1436 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1440 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1442 /* save this in 'oa', too, for later checking */
1443 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1444 oa->o_flags |= cksum_type_pack(cksum_type);
1446 /* clear out the checksum flag, in case this is a
1447 * resend but cl_checksum is no longer set. b=11238 */
1448 oa->o_valid &= ~OBD_MD_FLCKSUM;
1450 oa->o_cksum = body->oa.o_cksum;
1451 /* 1 RC per niobuf */
1452 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1453 sizeof(__u32) * niocount);
1455 if (unlikely(cli->cl_checksum) &&
1456 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1457 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1458 body->oa.o_flags = 0;
1459 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1460 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1463 ptlrpc_request_set_replen(req);
1465 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1466 aa = ptlrpc_req_async_args(req);
1468 aa->aa_requested_nob = requested_nob;
1469 aa->aa_nio_count = niocount;
1470 aa->aa_page_count = page_count;
1474 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1475 if (ocapa && reserve)
1476 aa->aa_ocapa = capa_get(ocapa);
1482 ptlrpc_req_finished(req);
1486 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1487 __u32 client_cksum, __u32 server_cksum, int nob,
1488 obd_count page_count, struct brw_page **pga,
1489 cksum_type_t client_cksum_type)
1493 cksum_type_t cksum_type;
1495 if (server_cksum == client_cksum) {
1496 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1500 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1502 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1505 if (cksum_type != client_cksum_type)
1506 msg = "the server did not use the checksum type specified in "
1507 "the original request - likely a protocol problem";
1508 else if (new_cksum == server_cksum)
1509 msg = "changed on the client after we checksummed it - "
1510 "likely false positive due to mmap IO (bug 11742)";
1511 else if (new_cksum == client_cksum)
1512 msg = "changed in transit before arrival at OST";
1514 msg = "changed in transit AND doesn't match the original - "
1515 "likely false positive due to mmap IO (bug 11742)";
1517 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1518 " object "LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
1519 msg, libcfs_nid2str(peer->nid),
1520 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1521 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1522 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1524 oa->o_valid & OBD_MD_FLGROUP ? oa->o_seq : (__u64)0,
1526 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1527 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1528 "client csum now %x\n", client_cksum, client_cksum_type,
1529 server_cksum, cksum_type, new_cksum);
1533 /* Note rc enters this function as number of bytes transferred */
1534 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1536 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1537 const lnet_process_id_t *peer =
1538 &req->rq_import->imp_connection->c_peer;
1539 struct client_obd *cli = aa->aa_cli;
1540 struct ost_body *body;
1541 __u32 client_cksum = 0;
1544 if (rc < 0 && rc != -EDQUOT) {
1545 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1549 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1550 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1552 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1556 /* set/clear over quota flag for a uid/gid */
1557 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1558 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1559 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1561 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid "LPX64", flags %x\n",
1562 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1564 osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
1567 osc_update_grant(cli, body);
1572 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1573 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1575 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1577 CERROR("Unexpected +ve rc %d\n", rc);
1580 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1582 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1585 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1586 check_write_checksum(&body->oa, peer, client_cksum,
1587 body->oa.o_cksum, aa->aa_requested_nob,
1588 aa->aa_page_count, aa->aa_ppga,
1589 cksum_type_unpack(aa->aa_oa->o_flags)))
1592 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1593 aa->aa_page_count, aa->aa_ppga);
1597 /* The rest of this function executes only for OST_READs */
1599 /* if unwrap_bulk failed, return -EAGAIN to retry */
1600 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1602 GOTO(out, rc = -EAGAIN);
1604 if (rc > aa->aa_requested_nob) {
1605 CERROR("Unexpected rc %d (%d requested)\n", rc,
1606 aa->aa_requested_nob);
1610 if (rc != req->rq_bulk->bd_nob_transferred) {
1611 CERROR ("Unexpected rc %d (%d transferred)\n",
1612 rc, req->rq_bulk->bd_nob_transferred);
1616 if (rc < aa->aa_requested_nob)
1617 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1619 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1620 static int cksum_counter;
1621 __u32 server_cksum = body->oa.o_cksum;
1624 cksum_type_t cksum_type;
1626 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1627 body->oa.o_flags : 0);
1628 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1629 aa->aa_ppga, OST_READ,
1632 if (peer->nid == req->rq_bulk->bd_sender) {
1636 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1639 if (server_cksum == ~0 && rc > 0) {
1640 CERROR("Protocol error: server %s set the 'checksum' "
1641 "bit, but didn't send a checksum. Not fatal, "
1642 "but please notify on http://bugs.whamcloud.com/\n",
1643 libcfs_nid2str(peer->nid));
1644 } else if (server_cksum != client_cksum) {
1645 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1646 "%s%s%s inode "DFID" object "
1647 LPU64"/"LPU64" extent "
1648 "["LPU64"-"LPU64"]\n",
1649 req->rq_import->imp_obd->obd_name,
1650 libcfs_nid2str(peer->nid),
1652 body->oa.o_valid & OBD_MD_FLFID ?
1653 body->oa.o_parent_seq : (__u64)0,
1654 body->oa.o_valid & OBD_MD_FLFID ?
1655 body->oa.o_parent_oid : 0,
1656 body->oa.o_valid & OBD_MD_FLFID ?
1657 body->oa.o_parent_ver : 0,
1659 body->oa.o_valid & OBD_MD_FLGROUP ?
1660 body->oa.o_seq : (__u64)0,
1661 aa->aa_ppga[0]->off,
1662 aa->aa_ppga[aa->aa_page_count-1]->off +
1663 aa->aa_ppga[aa->aa_page_count-1]->count -
1665 CERROR("client %x, server %x, cksum_type %x\n",
1666 client_cksum, server_cksum, cksum_type);
1668 aa->aa_oa->o_cksum = client_cksum;
1672 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1675 } else if (unlikely(client_cksum)) {
1676 static int cksum_missed;
1679 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1680 CERROR("Checksum %u requested from %s but not sent\n",
1681 cksum_missed, libcfs_nid2str(peer->nid));
1687 lustre_get_wire_obdo(aa->aa_oa, &body->oa);
1692 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1693 struct lov_stripe_md *lsm,
1694 obd_count page_count, struct brw_page **pga,
1695 struct obd_capa *ocapa)
1697 struct ptlrpc_request *req;
1701 struct l_wait_info lwi;
1705 cfs_waitq_init(&waitq);
1708 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1709 page_count, pga, &req, ocapa, 0, resends);
1713 rc = ptlrpc_queue_wait(req);
1715 if (rc == -ETIMEDOUT && req->rq_resend) {
1716 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1717 ptlrpc_req_finished(req);
1721 rc = osc_brw_fini_request(req, rc);
1723 ptlrpc_req_finished(req);
1724 if (osc_recoverable_error(rc)) {
1726 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
1727 CERROR("too many resend retries, returning error\n");
1731 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1732 l_wait_event(waitq, 0, &lwi);
1740 int osc_brw_redo_request(struct ptlrpc_request *request,
1741 struct osc_brw_async_args *aa)
1743 struct ptlrpc_request *new_req;
1744 struct ptlrpc_request_set *set = request->rq_set;
1745 struct osc_brw_async_args *new_aa;
1746 struct osc_async_page *oap;
1750 if (!client_should_resend(aa->aa_resends, aa->aa_cli)) {
1751 CERROR("too many resent retries, returning error\n");
1755 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1757 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1758 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1759 aa->aa_cli, aa->aa_oa,
1760 NULL /* lsm unused by osc currently */,
1761 aa->aa_page_count, aa->aa_ppga,
1762 &new_req, aa->aa_ocapa, 0, 1);
1766 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1768 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1769 if (oap->oap_request != NULL) {
1770 LASSERTF(request == oap->oap_request,
1771 "request %p != oap_request %p\n",
1772 request, oap->oap_request);
1773 if (oap->oap_interrupted) {
1774 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1775 ptlrpc_req_finished(new_req);
1780 /* New request takes over pga and oaps from old request.
1781 * Note that copying a list_head doesn't work, need to move it... */
1783 new_req->rq_interpret_reply = request->rq_interpret_reply;
1784 new_req->rq_async_args = request->rq_async_args;
1785 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1787 new_aa = ptlrpc_req_async_args(new_req);
1789 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1790 cfs_list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1791 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1793 cfs_list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1794 if (oap->oap_request) {
1795 ptlrpc_req_finished(oap->oap_request);
1796 oap->oap_request = ptlrpc_request_addref(new_req);
1800 new_aa->aa_ocapa = aa->aa_ocapa;
1801 aa->aa_ocapa = NULL;
1803 /* use ptlrpc_set_add_req is safe because interpret functions work
1804 * in check_set context. only one way exist with access to request
1805 * from different thread got -EINTR - this way protected with
1806 * cl_loi_list_lock */
1807 ptlrpc_set_add_req(set, new_req);
1809 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1811 DEBUG_REQ(D_INFO, new_req, "new request");
1816 * ugh, we want disk allocation on the target to happen in offset order. we'll
1817 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1818 * fine for our small page arrays and doesn't require allocation. its an
1819 * insertion sort that swaps elements that are strides apart, shrinking the
1820 * stride down until its '1' and the array is sorted.
1822 static void sort_brw_pages(struct brw_page **array, int num)
1825 struct brw_page *tmp;
1829 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1834 for (i = stride ; i < num ; i++) {
1837 while (j >= stride && array[j - stride]->off > tmp->off) {
1838 array[j] = array[j - stride];
1843 } while (stride > 1);
1846 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1852 LASSERT (pages > 0);
1853 offset = pg[i]->off & ~CFS_PAGE_MASK;
1857 if (pages == 0) /* that's all */
1860 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1861 return count; /* doesn't end on page boundary */
1864 offset = pg[i]->off & ~CFS_PAGE_MASK;
1865 if (offset != 0) /* doesn't start on page boundary */
1872 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1874 struct brw_page **ppga;
1877 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1881 for (i = 0; i < count; i++)
1886 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1888 LASSERT(ppga != NULL);
1889 OBD_FREE(ppga, sizeof(*ppga) * count);
1892 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1893 obd_count page_count, struct brw_page *pga,
1894 struct obd_trans_info *oti)
1896 struct obdo *saved_oa = NULL;
1897 struct brw_page **ppga, **orig;
1898 struct obd_import *imp = class_exp2cliimp(exp);
1899 struct client_obd *cli;
1900 int rc, page_count_orig;
1903 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1904 cli = &imp->imp_obd->u.cli;
1906 if (cmd & OBD_BRW_CHECK) {
1907 /* The caller just wants to know if there's a chance that this
1908 * I/O can succeed */
1910 if (imp->imp_invalid)
1915 /* test_brw with a failed create can trip this, maybe others. */
1916 LASSERT(cli->cl_max_pages_per_rpc);
1920 orig = ppga = osc_build_ppga(pga, page_count);
1923 page_count_orig = page_count;
1925 sort_brw_pages(ppga, page_count);
1926 while (page_count) {
1927 obd_count pages_per_brw;
1929 if (page_count > cli->cl_max_pages_per_rpc)
1930 pages_per_brw = cli->cl_max_pages_per_rpc;
1932 pages_per_brw = page_count;
1934 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1936 if (saved_oa != NULL) {
1937 /* restore previously saved oa */
1938 *oinfo->oi_oa = *saved_oa;
1939 } else if (page_count > pages_per_brw) {
1940 /* save a copy of oa (brw will clobber it) */
1941 OBDO_ALLOC(saved_oa);
1942 if (saved_oa == NULL)
1943 GOTO(out, rc = -ENOMEM);
1944 *saved_oa = *oinfo->oi_oa;
1947 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1948 pages_per_brw, ppga, oinfo->oi_capa);
1953 page_count -= pages_per_brw;
1954 ppga += pages_per_brw;
1958 osc_release_ppga(orig, page_count_orig);
1960 if (saved_oa != NULL)
1961 OBDO_FREE(saved_oa);
1966 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1967 * the dirty accounting. Writeback completes or truncate happens before
1968 * writing starts. Must be called with the loi lock held. */
1969 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1972 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1976 /* This maintains the lists of pending pages to read/write for a given object
1977 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1978 * to quickly find objects that are ready to send an RPC. */
1979 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1984 if (lop->lop_num_pending == 0)
1987 /* if we have an invalid import we want to drain the queued pages
1988 * by forcing them through rpcs that immediately fail and complete
1989 * the pages. recovery relies on this to empty the queued pages
1990 * before canceling the locks and evicting down the llite pages */
1991 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1994 /* stream rpcs in queue order as long as as there is an urgent page
1995 * queued. this is our cheap solution for good batching in the case
1996 * where writepage marks some random page in the middle of the file
1997 * as urgent because of, say, memory pressure */
1998 if (!cfs_list_empty(&lop->lop_urgent)) {
1999 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
2003 if (cmd & OBD_BRW_WRITE) {
2004 /* trigger a write rpc stream as long as there are dirtiers
2005 * waiting for space. as they're waiting, they're not going to
2006 * create more pages to coalesce with what's waiting.. */
2007 if (!cfs_list_empty(&cli->cl_cache_waiters)) {
2008 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
2012 if (lop->lop_num_pending >= cli->cl_max_pages_per_rpc)
2018 static int lop_makes_hprpc(struct loi_oap_pages *lop)
2020 struct osc_async_page *oap;
2023 if (cfs_list_empty(&lop->lop_urgent))
2026 oap = cfs_list_entry(lop->lop_urgent.next,
2027 struct osc_async_page, oap_urgent_item);
2029 if (oap->oap_async_flags & ASYNC_HP) {
2030 CDEBUG(D_CACHE, "hp request forcing RPC\n");
2037 static void on_list(cfs_list_t *item, cfs_list_t *list,
2040 if (cfs_list_empty(item) && should_be_on)
2041 cfs_list_add_tail(item, list);
2042 else if (!cfs_list_empty(item) && !should_be_on)
2043 cfs_list_del_init(item);
2046 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
2047 * can find pages to build into rpcs quickly */
2048 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
2050 if (lop_makes_hprpc(&loi->loi_write_lop) ||
2051 lop_makes_hprpc(&loi->loi_read_lop)) {
2053 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
2054 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
2056 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
2057 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
2058 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
2059 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
2062 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
2063 loi->loi_write_lop.lop_num_pending);
2065 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
2066 loi->loi_read_lop.lop_num_pending);
2069 static void lop_update_pending(struct client_obd *cli,
2070 struct loi_oap_pages *lop, int cmd, int delta)
2072 lop->lop_num_pending += delta;
2073 if (cmd & OBD_BRW_WRITE)
2074 cli->cl_pending_w_pages += delta;
2076 cli->cl_pending_r_pages += delta;
2080 * this is called when a sync waiter receives an interruption. Its job is to
2081 * get the caller woken as soon as possible. If its page hasn't been put in an
2082 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
2083 * desiring interruption which will forcefully complete the rpc once the rpc
2086 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
2088 struct loi_oap_pages *lop;
2089 struct lov_oinfo *loi;
2093 LASSERT(!oap->oap_interrupted);
2094 oap->oap_interrupted = 1;
2096 /* ok, it's been put in an rpc. only one oap gets a request reference */
2097 if (oap->oap_request != NULL) {
2098 ptlrpc_mark_interrupted(oap->oap_request);
2099 ptlrpcd_wake(oap->oap_request);
2100 ptlrpc_req_finished(oap->oap_request);
2101 oap->oap_request = NULL;
2105 * page completion may be called only if ->cpo_prep() method was
2106 * executed by osc_io_submit(), that also adds page the to pending list
2108 if (!cfs_list_empty(&oap->oap_pending_item)) {
2109 cfs_list_del_init(&oap->oap_pending_item);
2110 cfs_list_del_init(&oap->oap_urgent_item);
2113 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2114 &loi->loi_write_lop : &loi->loi_read_lop;
2115 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2116 loi_list_maint(oap->oap_cli, oap->oap_loi);
2117 rc = oap->oap_caller_ops->ap_completion(env,
2118 oap->oap_caller_data,
2119 oap->oap_cmd, NULL, -EINTR);
2125 /* this is trying to propogate async writeback errors back up to the
2126 * application. As an async write fails we record the error code for later if
2127 * the app does an fsync. As long as errors persist we force future rpcs to be
2128 * sync so that the app can get a sync error and break the cycle of queueing
2129 * pages for which writeback will fail. */
2130 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2137 ar->ar_force_sync = 1;
2138 ar->ar_min_xid = ptlrpc_sample_next_xid();
2143 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2144 ar->ar_force_sync = 0;
2147 void osc_oap_to_pending(struct osc_async_page *oap)
2149 struct loi_oap_pages *lop;
2151 if (oap->oap_cmd & OBD_BRW_WRITE)
2152 lop = &oap->oap_loi->loi_write_lop;
2154 lop = &oap->oap_loi->loi_read_lop;
2156 if (oap->oap_async_flags & ASYNC_HP)
2157 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2158 else if (oap->oap_async_flags & ASYNC_URGENT)
2159 cfs_list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2160 cfs_list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2161 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2164 /* this must be called holding the loi list lock to give coverage to exit_cache,
2165 * async_flag maintenance, and oap_request */
2166 static void osc_ap_completion(const struct lu_env *env,
2167 struct client_obd *cli, struct obdo *oa,
2168 struct osc_async_page *oap, int sent, int rc)
2173 if (oap->oap_request != NULL) {
2174 xid = ptlrpc_req_xid(oap->oap_request);
2175 ptlrpc_req_finished(oap->oap_request);
2176 oap->oap_request = NULL;
2179 cfs_spin_lock(&oap->oap_lock);
2180 oap->oap_async_flags = 0;
2181 cfs_spin_unlock(&oap->oap_lock);
2182 oap->oap_interrupted = 0;
2184 if (oap->oap_cmd & OBD_BRW_WRITE) {
2185 osc_process_ar(&cli->cl_ar, xid, rc);
2186 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2189 if (rc == 0 && oa != NULL) {
2190 if (oa->o_valid & OBD_MD_FLBLOCKS)
2191 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2192 if (oa->o_valid & OBD_MD_FLMTIME)
2193 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2194 if (oa->o_valid & OBD_MD_FLATIME)
2195 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2196 if (oa->o_valid & OBD_MD_FLCTIME)
2197 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2200 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2201 oap->oap_cmd, oa, rc);
2203 /* cl_page_completion() drops PG_locked. so, a new I/O on the page could
2204 * start, but OSC calls it under lock and thus we can add oap back to
2207 /* upper layer wants to leave the page on pending queue */
2208 osc_oap_to_pending(oap);
2210 osc_exit_cache(cli, oap, sent);
2214 static int brw_queue_work(const struct lu_env *env, void *data)
2216 struct client_obd *cli = data;
2218 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
2220 client_obd_list_lock(&cli->cl_loi_list_lock);
2221 osc_check_rpcs0(env, cli, 1);
2222 client_obd_list_unlock(&cli->cl_loi_list_lock);
2226 static int brw_interpret(const struct lu_env *env,
2227 struct ptlrpc_request *req, void *data, int rc)
2229 struct osc_brw_async_args *aa = data;
2230 struct client_obd *cli;
2234 rc = osc_brw_fini_request(req, rc);
2235 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2236 if (osc_recoverable_error(rc)) {
2237 rc = osc_brw_redo_request(req, aa);
2243 capa_put(aa->aa_ocapa);
2244 aa->aa_ocapa = NULL;
2248 client_obd_list_lock(&cli->cl_loi_list_lock);
2250 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2251 * is called so we know whether to go to sync BRWs or wait for more
2252 * RPCs to complete */
2253 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2254 cli->cl_w_in_flight--;
2256 cli->cl_r_in_flight--;
2258 async = cfs_list_empty(&aa->aa_oaps);
2259 if (!async) { /* from osc_send_oap_rpc() */
2260 struct osc_async_page *oap, *tmp;
2261 /* the caller may re-use the oap after the completion call so
2262 * we need to clean it up a little */
2263 cfs_list_for_each_entry_safe(oap, tmp, &aa->aa_oaps,
2265 cfs_list_del_init(&oap->oap_rpc_item);
2266 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2268 OBDO_FREE(aa->aa_oa);
2269 } else { /* from async_internal() */
2271 for (i = 0; i < aa->aa_page_count; i++)
2272 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2274 osc_wake_cache_waiters(cli);
2275 osc_check_rpcs0(env, cli, 1);
2276 client_obd_list_unlock(&cli->cl_loi_list_lock);
2279 cl_req_completion(env, aa->aa_clerq, rc < 0 ? rc :
2280 req->rq_bulk->bd_nob_transferred);
2281 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2282 ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
2287 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2288 struct client_obd *cli,
2289 cfs_list_t *rpc_list,
2290 int page_count, int cmd)
2292 struct ptlrpc_request *req;
2293 struct brw_page **pga = NULL;
2294 struct osc_brw_async_args *aa;
2295 struct obdo *oa = NULL;
2296 const struct obd_async_page_ops *ops = NULL;
2297 struct osc_async_page *oap;
2298 struct osc_async_page *tmp;
2299 struct cl_req *clerq = NULL;
2300 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2301 struct ldlm_lock *lock = NULL;
2302 struct cl_req_attr crattr;
2303 int i, rc, mpflag = 0;
2306 LASSERT(!cfs_list_empty(rpc_list));
2308 if (cmd & OBD_BRW_MEMALLOC)
2309 mpflag = cfs_memory_pressure_get_and_set();
2311 memset(&crattr, 0, sizeof crattr);
2312 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2314 GOTO(out, req = ERR_PTR(-ENOMEM));
2318 GOTO(out, req = ERR_PTR(-ENOMEM));
2321 cfs_list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2322 struct cl_page *page = osc_oap2cl_page(oap);
2324 ops = oap->oap_caller_ops;
2326 clerq = cl_req_alloc(env, page, crt,
2327 1 /* only 1-object rpcs for
2330 GOTO(out, req = (void *)clerq);
2331 lock = oap->oap_ldlm_lock;
2333 pga[i] = &oap->oap_brw_page;
2334 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2335 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2336 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2338 cl_req_page_add(env, clerq, page);
2341 /* always get the data for the obdo for the rpc */
2342 LASSERT(ops != NULL);
2344 crattr.cra_capa = NULL;
2345 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2347 oa->o_handle = lock->l_remote_handle;
2348 oa->o_valid |= OBD_MD_FLHANDLE;
2351 rc = cl_req_prep(env, clerq);
2353 CERROR("cl_req_prep failed: %d\n", rc);
2354 GOTO(out, req = ERR_PTR(rc));
2357 sort_brw_pages(pga, page_count);
2358 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2359 pga, &req, crattr.cra_capa, 1, 0);
2361 CERROR("prep_req failed: %d\n", rc);
2362 GOTO(out, req = ERR_PTR(rc));
2365 if (cmd & OBD_BRW_MEMALLOC)
2366 req->rq_memalloc = 1;
2368 /* Need to update the timestamps after the request is built in case
2369 * we race with setattr (locally or in queue at OST). If OST gets
2370 * later setattr before earlier BRW (as determined by the request xid),
2371 * the OST will not use BRW timestamps. Sadly, there is no obvious
2372 * way to do this in a single call. bug 10150 */
2373 cl_req_attr_set(env, clerq, &crattr,
2374 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2376 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2377 aa = ptlrpc_req_async_args(req);
2378 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2379 cfs_list_splice(rpc_list, &aa->aa_oaps);
2380 CFS_INIT_LIST_HEAD(rpc_list);
2381 aa->aa_clerq = clerq;
2383 if (cmd & OBD_BRW_MEMALLOC)
2384 cfs_memory_pressure_restore(mpflag);
2386 capa_put(crattr.cra_capa);
2391 OBD_FREE(pga, sizeof(*pga) * page_count);
2392 /* this should happen rarely and is pretty bad, it makes the
2393 * pending list not follow the dirty order */
2394 client_obd_list_lock(&cli->cl_loi_list_lock);
2395 cfs_list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2396 cfs_list_del_init(&oap->oap_rpc_item);
2398 /* queued sync pages can be torn down while the pages
2399 * were between the pending list and the rpc */
2400 if (oap->oap_interrupted) {
2401 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2402 osc_ap_completion(env, cli, NULL, oap, 0,
2406 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2408 if (clerq && !IS_ERR(clerq))
2409 cl_req_completion(env, clerq, PTR_ERR(req));
2415 * prepare pages for ASYNC io and put pages in send queue.
2417 * \param cmd OBD_BRW_* macroses
2418 * \param lop pending pages
2420 * \return zero if no page added to send queue.
2421 * \return 1 if pages successfully added to send queue.
2422 * \return negative on errors.
2425 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2426 struct lov_oinfo *loi, int cmd,
2427 struct loi_oap_pages *lop, pdl_policy_t pol)
2429 struct ptlrpc_request *req;
2430 obd_count page_count = 0;
2431 struct osc_async_page *oap = NULL, *tmp;
2432 struct osc_brw_async_args *aa;
2433 const struct obd_async_page_ops *ops;
2434 CFS_LIST_HEAD(rpc_list);
2435 int srvlock = 0, mem_tight = 0;
2436 struct cl_object *clob = NULL;
2437 obd_off starting_offset = OBD_OBJECT_EOF;
2438 unsigned int ending_offset;
2439 int starting_page_off = 0;
2442 /* ASYNC_HP pages first. At present, when the lock the pages is
2443 * to be canceled, the pages covered by the lock will be sent out
2444 * with ASYNC_HP. We have to send out them as soon as possible. */
2445 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_urgent, oap_urgent_item) {
2446 if (oap->oap_async_flags & ASYNC_HP)
2447 cfs_list_move(&oap->oap_pending_item, &rpc_list);
2448 else if (!(oap->oap_brw_flags & OBD_BRW_SYNC))
2449 /* only do this for writeback pages. */
2450 cfs_list_move_tail(&oap->oap_pending_item, &rpc_list);
2451 if (++page_count >= cli->cl_max_pages_per_rpc)
2454 cfs_list_splice_init(&rpc_list, &lop->lop_pending);
2457 /* first we find the pages we're allowed to work with */
2458 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2460 ops = oap->oap_caller_ops;
2462 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2463 "magic 0x%x\n", oap, oap->oap_magic);
2466 /* pin object in memory, so that completion call-backs
2467 * can be safely called under client_obd_list lock. */
2468 clob = osc_oap2cl_page(oap)->cp_obj;
2469 cl_object_get(clob);
2472 if (page_count != 0 &&
2473 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2474 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2475 " oap %p, page %p, srvlock %u\n",
2476 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2480 /* If there is a gap at the start of this page, it can't merge
2481 * with any previous page, so we'll hand the network a
2482 * "fragmented" page array that it can't transfer in 1 RDMA */
2483 if (oap->oap_obj_off < starting_offset) {
2484 if (starting_page_off != 0)
2487 starting_page_off = oap->oap_page_off;
2488 starting_offset = oap->oap_obj_off + starting_page_off;
2489 } else if (oap->oap_page_off != 0)
2492 /* in llite being 'ready' equates to the page being locked
2493 * until completion unlocks it. commit_write submits a page
2494 * as not ready because its unlock will happen unconditionally
2495 * as the call returns. if we race with commit_write giving
2496 * us that page we don't want to create a hole in the page
2497 * stream, so we stop and leave the rpc to be fired by
2498 * another dirtier or kupdated interval (the not ready page
2499 * will still be on the dirty list). we could call in
2500 * at the end of ll_file_write to process the queue again. */
2501 if (!(oap->oap_async_flags & ASYNC_READY)) {
2502 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2505 CDEBUG(D_INODE, "oap %p page %p returned %d "
2506 "instead of ready\n", oap,
2510 /* llite is telling us that the page is still
2511 * in commit_write and that we should try
2512 * and put it in an rpc again later. we
2513 * break out of the loop so we don't create
2514 * a hole in the sequence of pages in the rpc
2519 /* the io isn't needed.. tell the checks
2520 * below to complete the rpc with EINTR */
2521 cfs_spin_lock(&oap->oap_lock);
2522 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2523 cfs_spin_unlock(&oap->oap_lock);
2524 oap->oap_count = -EINTR;
2527 cfs_spin_lock(&oap->oap_lock);
2528 oap->oap_async_flags |= ASYNC_READY;
2529 cfs_spin_unlock(&oap->oap_lock);
2532 LASSERTF(0, "oap %p page %p returned %d "
2533 "from make_ready\n", oap,
2541 /* take the page out of our book-keeping */
2542 cfs_list_del_init(&oap->oap_pending_item);
2543 lop_update_pending(cli, lop, cmd, -1);
2544 cfs_list_del_init(&oap->oap_urgent_item);
2546 /* ask the caller for the size of the io as the rpc leaves. */
2547 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2549 ops->ap_refresh_count(env, oap->oap_caller_data,
2551 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2553 if (oap->oap_count <= 0) {
2554 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2556 osc_ap_completion(env, cli, NULL,
2557 oap, 0, oap->oap_count);
2561 /* now put the page back in our accounting */
2562 cfs_list_add_tail(&oap->oap_rpc_item, &rpc_list);
2563 if (page_count++ == 0)
2564 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2566 if (oap->oap_brw_flags & OBD_BRW_MEMALLOC)
2569 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2570 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2571 * have the same alignment as the initial writes that allocated
2572 * extents on the server. */
2573 ending_offset = oap->oap_obj_off + oap->oap_page_off +
2575 if (!(ending_offset & (PTLRPC_MAX_BRW_SIZE - 1)))
2578 if (page_count >= cli->cl_max_pages_per_rpc)
2581 /* If there is a gap at the end of this page, it can't merge
2582 * with any subsequent pages, so we'll hand the network a
2583 * "fragmented" page array that it can't transfer in 1 RDMA */
2584 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2588 loi_list_maint(cli, loi);
2590 client_obd_list_unlock(&cli->cl_loi_list_lock);
2593 cl_object_put(env, clob);
2595 if (page_count == 0) {
2596 client_obd_list_lock(&cli->cl_loi_list_lock);
2600 req = osc_build_req(env, cli, &rpc_list, page_count,
2601 mem_tight ? (cmd | OBD_BRW_MEMALLOC) : cmd);
2603 LASSERT(cfs_list_empty(&rpc_list));
2604 loi_list_maint(cli, loi);
2605 RETURN(PTR_ERR(req));
2608 aa = ptlrpc_req_async_args(req);
2610 starting_offset &= PTLRPC_MAX_BRW_SIZE - 1;
2611 if (cmd == OBD_BRW_READ) {
2612 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2613 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2614 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2615 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2617 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2618 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2619 cli->cl_w_in_flight);
2620 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2621 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2624 client_obd_list_lock(&cli->cl_loi_list_lock);
2626 if (cmd == OBD_BRW_READ)
2627 cli->cl_r_in_flight++;
2629 cli->cl_w_in_flight++;
2631 /* queued sync pages can be torn down while the pages
2632 * were between the pending list and the rpc */
2634 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2635 /* only one oap gets a request reference */
2638 if (oap->oap_interrupted && !req->rq_intr) {
2639 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2641 ptlrpc_mark_interrupted(req);
2645 tmp->oap_request = ptlrpc_request_addref(req);
2647 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2648 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2650 req->rq_interpret_reply = brw_interpret;
2652 /* XXX: Maybe the caller can check the RPC bulk descriptor to see which
2653 * CPU/NUMA node the majority of pages were allocated on, and try
2654 * to assign the async RPC to the CPU core (PDL_POLICY_PREFERRED)
2655 * to reduce cross-CPU memory traffic.
2657 * But on the other hand, we expect that multiple ptlrpcd threads
2658 * and the initial write sponsor can run in parallel, especially
2659 * when data checksum is enabled, which is CPU-bound operation and
2660 * single ptlrpcd thread cannot process in time. So more ptlrpcd
2661 * threads sharing BRW load (with PDL_POLICY_ROUND) seems better.
2663 ptlrpcd_add_req(req, pol, -1);
2667 #define LOI_DEBUG(LOI, STR, args...) \
2668 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2669 !cfs_list_empty(&(LOI)->loi_ready_item) || \
2670 !cfs_list_empty(&(LOI)->loi_hp_ready_item), \
2671 (LOI)->loi_write_lop.lop_num_pending, \
2672 !cfs_list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2673 (LOI)->loi_read_lop.lop_num_pending, \
2674 !cfs_list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2677 /* This is called by osc_check_rpcs() to find which objects have pages that
2678 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2679 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2683 /* First return objects that have blocked locks so that they
2684 * will be flushed quickly and other clients can get the lock,
2685 * then objects which have pages ready to be stuffed into RPCs */
2686 if (!cfs_list_empty(&cli->cl_loi_hp_ready_list))
2687 RETURN(cfs_list_entry(cli->cl_loi_hp_ready_list.next,
2688 struct lov_oinfo, loi_hp_ready_item));
2689 if (!cfs_list_empty(&cli->cl_loi_ready_list))
2690 RETURN(cfs_list_entry(cli->cl_loi_ready_list.next,
2691 struct lov_oinfo, loi_ready_item));
2693 /* then if we have cache waiters, return all objects with queued
2694 * writes. This is especially important when many small files
2695 * have filled up the cache and not been fired into rpcs because
2696 * they don't pass the nr_pending/object threshhold */
2697 if (!cfs_list_empty(&cli->cl_cache_waiters) &&
2698 !cfs_list_empty(&cli->cl_loi_write_list))
2699 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2700 struct lov_oinfo, loi_write_item));
2702 /* then return all queued objects when we have an invalid import
2703 * so that they get flushed */
2704 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2705 if (!cfs_list_empty(&cli->cl_loi_write_list))
2706 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2709 if (!cfs_list_empty(&cli->cl_loi_read_list))
2710 RETURN(cfs_list_entry(cli->cl_loi_read_list.next,
2711 struct lov_oinfo, loi_read_item));
2716 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2718 struct osc_async_page *oap;
2721 if (!cfs_list_empty(&loi->loi_write_lop.lop_urgent)) {
2722 oap = cfs_list_entry(loi->loi_write_lop.lop_urgent.next,
2723 struct osc_async_page, oap_urgent_item);
2724 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2727 if (!hprpc && !cfs_list_empty(&loi->loi_read_lop.lop_urgent)) {
2728 oap = cfs_list_entry(loi->loi_read_lop.lop_urgent.next,
2729 struct osc_async_page, oap_urgent_item);
2730 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2733 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2736 /* called with the loi list lock held */
2737 static void osc_check_rpcs0(const struct lu_env *env, struct client_obd *cli, int ptlrpc)
2739 struct lov_oinfo *loi;
2740 int rc = 0, race_counter = 0;
2744 pol = ptlrpc ? PDL_POLICY_SAME : PDL_POLICY_ROUND;
2746 while ((loi = osc_next_loi(cli)) != NULL) {
2747 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2749 if (osc_max_rpc_in_flight(cli, loi))
2752 /* attempt some read/write balancing by alternating between
2753 * reads and writes in an object. The makes_rpc checks here
2754 * would be redundant if we were getting read/write work items
2755 * instead of objects. we don't want send_oap_rpc to drain a
2756 * partial read pending queue when we're given this object to
2757 * do io on writes while there are cache waiters */
2758 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2759 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2760 &loi->loi_write_lop, pol);
2762 CERROR("Write request failed with %d\n", rc);
2764 /* osc_send_oap_rpc failed, mostly because of
2767 * It can't break here, because if:
2768 * - a page was submitted by osc_io_submit, so
2770 * - no request in flight
2771 * - no subsequent request
2772 * The system will be in live-lock state,
2773 * because there is no chance to call
2774 * osc_io_unplug() and osc_check_rpcs() any
2775 * more. pdflush can't help in this case,
2776 * because it might be blocked at grabbing
2777 * the page lock as we mentioned.
2779 * Anyway, continue to drain pages. */
2788 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2789 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2790 &loi->loi_read_lop, pol);
2792 CERROR("Read request failed with %d\n", rc);
2800 /* attempt some inter-object balancing by issuing rpcs
2801 * for each object in turn */
2802 if (!cfs_list_empty(&loi->loi_hp_ready_item))
2803 cfs_list_del_init(&loi->loi_hp_ready_item);
2804 if (!cfs_list_empty(&loi->loi_ready_item))
2805 cfs_list_del_init(&loi->loi_ready_item);
2806 if (!cfs_list_empty(&loi->loi_write_item))
2807 cfs_list_del_init(&loi->loi_write_item);
2808 if (!cfs_list_empty(&loi->loi_read_item))
2809 cfs_list_del_init(&loi->loi_read_item);
2811 loi_list_maint(cli, loi);
2813 /* send_oap_rpc fails with 0 when make_ready tells it to
2814 * back off. llite's make_ready does this when it tries
2815 * to lock a page queued for write that is already locked.
2816 * we want to try sending rpcs from many objects, but we
2817 * don't want to spin failing with 0. */
2818 if (race_counter == 10)
2823 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2825 osc_check_rpcs0(env, cli, 0);
2829 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2832 int osc_enter_cache_try(const struct lu_env *env,
2833 struct client_obd *cli, struct lov_oinfo *loi,
2834 struct osc_async_page *oap, int transient)
2838 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2840 osc_consume_write_grant(cli, &oap->oap_brw_page);
2842 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2843 cfs_atomic_inc(&obd_dirty_transit_pages);
2844 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2850 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2851 * grant or cache space. */
2852 static int osc_enter_cache(const struct lu_env *env,
2853 struct client_obd *cli, struct lov_oinfo *loi,
2854 struct osc_async_page *oap)
2856 struct osc_cache_waiter ocw;
2857 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
2861 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2862 "grant: %lu\n", cli->cl_dirty, cfs_atomic_read(&obd_dirty_pages),
2863 cli->cl_dirty_max, obd_max_dirty_pages,
2864 cli->cl_lost_grant, cli->cl_avail_grant);
2866 /* force the caller to try sync io. this can jump the list
2867 * of queued writes and create a discontiguous rpc stream */
2868 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_NO_GRANT) ||
2869 cli->cl_dirty_max < CFS_PAGE_SIZE ||
2870 cli->cl_ar.ar_force_sync || loi->loi_ar.ar_force_sync)
2873 /* Hopefully normal case - cache space and write credits available */
2874 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2875 cfs_atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2876 osc_enter_cache_try(env, cli, loi, oap, 0))
2879 /* We can get here for two reasons: too many dirty pages in cache, or
2880 * run out of grants. In both cases we should write dirty pages out.
2881 * Adding a cache waiter will trigger urgent write-out no matter what
2883 * The exiting condition is no avail grants and no dirty pages caching,
2884 * that really means there is no space on the OST. */
2885 cfs_waitq_init(&ocw.ocw_waitq);
2887 while (cli->cl_dirty > 0) {
2888 cfs_list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2891 loi_list_maint(cli, loi);
2892 osc_check_rpcs(env, cli);
2893 client_obd_list_unlock(&cli->cl_loi_list_lock);
2895 CDEBUG(D_CACHE, "%s: sleeping for cache space @ %p for %p\n",
2896 cli->cl_import->imp_obd->obd_name, &ocw, oap);
2898 rc = l_wait_event(ocw.ocw_waitq, cfs_list_empty(&ocw.ocw_entry), &lwi);
2900 client_obd_list_lock(&cli->cl_loi_list_lock);
2901 cfs_list_del_init(&ocw.ocw_entry);
2914 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2915 struct lov_oinfo *loi, cfs_page_t *page,
2916 obd_off offset, const struct obd_async_page_ops *ops,
2917 void *data, void **res, int nocache,
2918 struct lustre_handle *lockh)
2920 struct osc_async_page *oap;
2925 return cfs_size_round(sizeof(*oap));
2928 oap->oap_magic = OAP_MAGIC;
2929 oap->oap_cli = &exp->exp_obd->u.cli;
2932 oap->oap_caller_ops = ops;
2933 oap->oap_caller_data = data;
2935 oap->oap_page = page;
2936 oap->oap_obj_off = offset;
2937 if (!client_is_remote(exp) &&
2938 cfs_capable(CFS_CAP_SYS_RESOURCE))
2939 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2941 LASSERT(!(offset & ~CFS_PAGE_MASK));
2943 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2944 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2945 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2946 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2948 cfs_spin_lock_init(&oap->oap_lock);
2949 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2953 int osc_queue_async_io(const struct lu_env *env, struct obd_export *exp,
2954 struct lov_stripe_md *lsm, struct lov_oinfo *loi,
2955 struct osc_async_page *oap, int cmd, int off,
2956 int count, obd_flag brw_flags, enum async_flags async_flags)
2958 struct client_obd *cli = &exp->exp_obd->u.cli;
2962 if (oap->oap_magic != OAP_MAGIC)
2965 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2968 if (!cfs_list_empty(&oap->oap_pending_item) ||
2969 !cfs_list_empty(&oap->oap_urgent_item) ||
2970 !cfs_list_empty(&oap->oap_rpc_item))
2973 /* check if the file's owner/group is over quota */
2974 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
2975 struct cl_object *obj;
2976 struct cl_attr attr; /* XXX put attr into thread info */
2977 unsigned int qid[MAXQUOTAS];
2979 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
2981 cl_object_attr_lock(obj);
2982 rc = cl_object_attr_get(env, obj, &attr);
2983 cl_object_attr_unlock(obj);
2985 qid[USRQUOTA] = attr.cat_uid;
2986 qid[GRPQUOTA] = attr.cat_gid;
2988 osc_quota_chkdq(cli, qid) == NO_QUOTA)
2995 loi = lsm->lsm_oinfo[0];
2997 client_obd_list_lock(&cli->cl_loi_list_lock);
2999 LASSERT(off + count <= CFS_PAGE_SIZE);
3001 oap->oap_page_off = off;
3002 oap->oap_count = count;
3003 oap->oap_brw_flags = brw_flags;
3004 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
3005 if (cfs_memory_pressure_get())
3006 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
3007 cfs_spin_lock(&oap->oap_lock);
3008 oap->oap_async_flags = async_flags;
3009 cfs_spin_unlock(&oap->oap_lock);
3011 if (cmd & OBD_BRW_WRITE) {
3012 rc = osc_enter_cache(env, cli, loi, oap);
3014 client_obd_list_unlock(&cli->cl_loi_list_lock);
3019 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
3022 osc_oap_to_pending(oap);
3023 loi_list_maint(cli, loi);
3024 if (!osc_max_rpc_in_flight(cli, loi) &&
3025 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
3026 LASSERT(cli->cl_writeback_work != NULL);
3027 rc = ptlrpcd_queue_work(cli->cl_writeback_work);
3029 CDEBUG(D_CACHE, "Queued writeback work for client obd %p/%d.\n",
3032 client_obd_list_unlock(&cli->cl_loi_list_lock);
3037 /* aka (~was & now & flag), but this is more clear :) */
3038 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
3040 int osc_set_async_flags_base(struct client_obd *cli,
3041 struct lov_oinfo *loi, struct osc_async_page *oap,
3042 obd_flag async_flags)
3044 struct loi_oap_pages *lop;
3048 LASSERT(!cfs_list_empty(&oap->oap_pending_item));
3050 if (oap->oap_cmd & OBD_BRW_WRITE) {
3051 lop = &loi->loi_write_lop;
3053 lop = &loi->loi_read_lop;
3056 if ((oap->oap_async_flags & async_flags) == async_flags)
3059 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
3060 flags |= ASYNC_READY;
3062 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
3063 cfs_list_empty(&oap->oap_rpc_item)) {
3064 if (oap->oap_async_flags & ASYNC_HP)
3065 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
3067 cfs_list_add_tail(&oap->oap_urgent_item,
3069 flags |= ASYNC_URGENT;
3070 loi_list_maint(cli, loi);
3072 cfs_spin_lock(&oap->oap_lock);
3073 oap->oap_async_flags |= flags;
3074 cfs_spin_unlock(&oap->oap_lock);
3076 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
3077 oap->oap_async_flags);
3081 int osc_teardown_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
3082 struct lov_oinfo *loi, struct osc_async_page *oap)
3084 struct client_obd *cli = &exp->exp_obd->u.cli;
3085 struct loi_oap_pages *lop;
3089 if (oap->oap_magic != OAP_MAGIC)
3093 loi = lsm->lsm_oinfo[0];
3095 if (oap->oap_cmd & OBD_BRW_WRITE) {
3096 lop = &loi->loi_write_lop;
3098 lop = &loi->loi_read_lop;
3101 client_obd_list_lock(&cli->cl_loi_list_lock);
3103 if (!cfs_list_empty(&oap->oap_rpc_item))
3104 GOTO(out, rc = -EBUSY);
3106 osc_exit_cache(cli, oap, 0);
3107 osc_wake_cache_waiters(cli);
3109 if (!cfs_list_empty(&oap->oap_urgent_item)) {
3110 cfs_list_del_init(&oap->oap_urgent_item);
3111 cfs_spin_lock(&oap->oap_lock);
3112 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3113 cfs_spin_unlock(&oap->oap_lock);
3115 if (!cfs_list_empty(&oap->oap_pending_item)) {
3116 cfs_list_del_init(&oap->oap_pending_item);
3117 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3119 loi_list_maint(cli, loi);
3120 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3122 client_obd_list_unlock(&cli->cl_loi_list_lock);
3126 static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
3127 struct ldlm_enqueue_info *einfo)
3129 void *data = einfo->ei_cbdata;
3132 LASSERT(lock != NULL);
3133 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3134 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3135 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3136 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3138 lock_res_and_lock(lock);
3139 cfs_spin_lock(&osc_ast_guard);
3141 if (lock->l_ast_data == NULL)
3142 lock->l_ast_data = data;
3143 if (lock->l_ast_data == data)
3146 cfs_spin_unlock(&osc_ast_guard);
3147 unlock_res_and_lock(lock);
3152 static int osc_set_data_with_check(struct lustre_handle *lockh,
3153 struct ldlm_enqueue_info *einfo)
3155 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3159 set = osc_set_lock_data_with_check(lock, einfo);
3160 LDLM_LOCK_PUT(lock);
3162 CERROR("lockh %p, data %p - client evicted?\n",
3163 lockh, einfo->ei_cbdata);
3167 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3168 ldlm_iterator_t replace, void *data)
3170 struct ldlm_res_id res_id;
3171 struct obd_device *obd = class_exp2obd(exp);
3173 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3174 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3178 /* find any ldlm lock of the inode in osc
3182 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3183 ldlm_iterator_t replace, void *data)
3185 struct ldlm_res_id res_id;
3186 struct obd_device *obd = class_exp2obd(exp);
3189 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3190 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3191 if (rc == LDLM_ITER_STOP)
3193 if (rc == LDLM_ITER_CONTINUE)
3198 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3199 obd_enqueue_update_f upcall, void *cookie,
3200 int *flags, int agl, int rc)
3202 int intent = *flags & LDLM_FL_HAS_INTENT;
3206 /* The request was created before ldlm_cli_enqueue call. */
3207 if (rc == ELDLM_LOCK_ABORTED) {
3208 struct ldlm_reply *rep;
3209 rep = req_capsule_server_get(&req->rq_pill,
3212 LASSERT(rep != NULL);
3213 if (rep->lock_policy_res1)
3214 rc = rep->lock_policy_res1;
3218 if ((intent != 0 && rc == ELDLM_LOCK_ABORTED && agl == 0) ||
3220 *flags |= LDLM_FL_LVB_READY;
3221 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3222 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3225 /* Call the update callback. */
3226 rc = (*upcall)(cookie, rc);
3230 static int osc_enqueue_interpret(const struct lu_env *env,
3231 struct ptlrpc_request *req,
3232 struct osc_enqueue_args *aa, int rc)
3234 struct ldlm_lock *lock;
3235 struct lustre_handle handle;
3237 struct ost_lvb *lvb;
3239 int *flags = aa->oa_flags;
3241 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3242 * might be freed anytime after lock upcall has been called. */
3243 lustre_handle_copy(&handle, aa->oa_lockh);
3244 mode = aa->oa_ei->ei_mode;
3246 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3248 lock = ldlm_handle2lock(&handle);
3250 /* Take an additional reference so that a blocking AST that
3251 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3252 * to arrive after an upcall has been executed by
3253 * osc_enqueue_fini(). */
3254 ldlm_lock_addref(&handle, mode);
3256 /* Let CP AST to grant the lock first. */
3257 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
3259 if (aa->oa_agl && rc == ELDLM_LOCK_ABORTED) {
3264 lvb_len = sizeof(*aa->oa_lvb);
3267 /* Complete obtaining the lock procedure. */
3268 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3269 mode, flags, lvb, lvb_len, &handle, rc);
3270 /* Complete osc stuff. */
3271 rc = osc_enqueue_fini(req, aa->oa_lvb, aa->oa_upcall, aa->oa_cookie,
3272 flags, aa->oa_agl, rc);
3274 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3276 /* Release the lock for async request. */
3277 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3279 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3280 * not already released by
3281 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3283 ldlm_lock_decref(&handle, mode);
3285 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3286 aa->oa_lockh, req, aa);
3287 ldlm_lock_decref(&handle, mode);
3288 LDLM_LOCK_PUT(lock);
3292 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3293 struct lov_oinfo *loi, int flags,
3294 struct ost_lvb *lvb, __u32 mode, int rc)
3296 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3298 if (rc == ELDLM_OK) {
3301 LASSERT(lock != NULL);
3302 loi->loi_lvb = *lvb;
3303 tmp = loi->loi_lvb.lvb_size;
3304 /* Extend KMS up to the end of this lock and no further
3305 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3306 if (tmp > lock->l_policy_data.l_extent.end)
3307 tmp = lock->l_policy_data.l_extent.end + 1;
3308 if (tmp >= loi->loi_kms) {
3309 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3310 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3311 loi_kms_set(loi, tmp);
3313 LDLM_DEBUG(lock, "lock acquired, setting rss="
3314 LPU64"; leaving kms="LPU64", end="LPU64,
3315 loi->loi_lvb.lvb_size, loi->loi_kms,
3316 lock->l_policy_data.l_extent.end);
3318 ldlm_lock_allow_match(lock);
3319 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3320 LASSERT(lock != NULL);
3321 loi->loi_lvb = *lvb;
3322 ldlm_lock_allow_match(lock);
3323 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3324 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3330 ldlm_lock_fail_match(lock);
3332 LDLM_LOCK_PUT(lock);
3335 EXPORT_SYMBOL(osc_update_enqueue);
3337 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3339 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3340 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3341 * other synchronous requests, however keeping some locks and trying to obtain
3342 * others may take a considerable amount of time in a case of ost failure; and
3343 * when other sync requests do not get released lock from a client, the client
3344 * is excluded from the cluster -- such scenarious make the life difficult, so
3345 * release locks just after they are obtained. */
3346 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3347 int *flags, ldlm_policy_data_t *policy,
3348 struct ost_lvb *lvb, int kms_valid,
3349 obd_enqueue_update_f upcall, void *cookie,
3350 struct ldlm_enqueue_info *einfo,
3351 struct lustre_handle *lockh,
3352 struct ptlrpc_request_set *rqset, int async, int agl)
3354 struct obd_device *obd = exp->exp_obd;
3355 struct ptlrpc_request *req = NULL;
3356 int intent = *flags & LDLM_FL_HAS_INTENT;
3357 int match_lvb = (agl != 0 ? 0 : LDLM_FL_LVB_READY);
3362 /* Filesystem lock extents are extended to page boundaries so that
3363 * dealing with the page cache is a little smoother. */
3364 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3365 policy->l_extent.end |= ~CFS_PAGE_MASK;
3368 * kms is not valid when either object is completely fresh (so that no
3369 * locks are cached), or object was evicted. In the latter case cached
3370 * lock cannot be used, because it would prime inode state with
3371 * potentially stale LVB.
3376 /* Next, search for already existing extent locks that will cover us */
3377 /* If we're trying to read, we also search for an existing PW lock. The
3378 * VFS and page cache already protect us locally, so lots of readers/
3379 * writers can share a single PW lock.
3381 * There are problems with conversion deadlocks, so instead of
3382 * converting a read lock to a write lock, we'll just enqueue a new
3385 * At some point we should cancel the read lock instead of making them
3386 * send us a blocking callback, but there are problems with canceling
3387 * locks out from other users right now, too. */
3388 mode = einfo->ei_mode;
3389 if (einfo->ei_mode == LCK_PR)
3391 mode = ldlm_lock_match(obd->obd_namespace, *flags | match_lvb, res_id,
3392 einfo->ei_type, policy, mode, lockh, 0);
3394 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3396 if ((agl != 0) && !(matched->l_flags & LDLM_FL_LVB_READY)) {
3397 /* For AGL, if enqueue RPC is sent but the lock is not
3398 * granted, then skip to process this strpe.
3399 * Return -ECANCELED to tell the caller. */
3400 ldlm_lock_decref(lockh, mode);
3401 LDLM_LOCK_PUT(matched);
3403 } else if (osc_set_lock_data_with_check(matched, einfo)) {
3404 *flags |= LDLM_FL_LVB_READY;
3405 /* addref the lock only if not async requests and PW
3406 * lock is matched whereas we asked for PR. */
3407 if (!rqset && einfo->ei_mode != mode)
3408 ldlm_lock_addref(lockh, LCK_PR);
3410 /* I would like to be able to ASSERT here that
3411 * rss <= kms, but I can't, for reasons which
3412 * are explained in lov_enqueue() */
3415 /* We already have a lock, and it's referenced */
3416 (*upcall)(cookie, ELDLM_OK);
3418 if (einfo->ei_mode != mode)
3419 ldlm_lock_decref(lockh, LCK_PW);
3421 /* For async requests, decref the lock. */
3422 ldlm_lock_decref(lockh, einfo->ei_mode);
3423 LDLM_LOCK_PUT(matched);
3426 ldlm_lock_decref(lockh, mode);
3427 LDLM_LOCK_PUT(matched);
3433 CFS_LIST_HEAD(cancels);
3434 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3435 &RQF_LDLM_ENQUEUE_LVB);
3439 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3441 ptlrpc_request_free(req);
3445 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3447 ptlrpc_request_set_replen(req);
3450 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3451 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3453 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3454 sizeof(*lvb), lockh, async);
3457 struct osc_enqueue_args *aa;
3458 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3459 aa = ptlrpc_req_async_args(req);
3462 aa->oa_flags = flags;
3463 aa->oa_upcall = upcall;
3464 aa->oa_cookie = cookie;
3466 aa->oa_lockh = lockh;
3469 req->rq_interpret_reply =
3470 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3471 if (rqset == PTLRPCD_SET)
3472 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
3474 ptlrpc_set_add_req(rqset, req);
3475 } else if (intent) {
3476 ptlrpc_req_finished(req);
3481 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, agl, rc);
3483 ptlrpc_req_finished(req);
3488 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3489 struct ldlm_enqueue_info *einfo,
3490 struct ptlrpc_request_set *rqset)
3492 struct ldlm_res_id res_id;
3496 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3497 oinfo->oi_md->lsm_object_seq, &res_id);
3499 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3500 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3501 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3502 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3503 rqset, rqset != NULL, 0);
3507 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3508 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3509 int *flags, void *data, struct lustre_handle *lockh,
3512 struct obd_device *obd = exp->exp_obd;
3513 int lflags = *flags;
3517 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3520 /* Filesystem lock extents are extended to page boundaries so that
3521 * dealing with the page cache is a little smoother */
3522 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3523 policy->l_extent.end |= ~CFS_PAGE_MASK;
3525 /* Next, search for already existing extent locks that will cover us */
3526 /* If we're trying to read, we also search for an existing PW lock. The
3527 * VFS and page cache already protect us locally, so lots of readers/
3528 * writers can share a single PW lock. */
3532 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3533 res_id, type, policy, rc, lockh, unref);
3536 if (!osc_set_data_with_check(lockh, data)) {
3537 if (!(lflags & LDLM_FL_TEST_LOCK))
3538 ldlm_lock_decref(lockh, rc);
3542 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3543 ldlm_lock_addref(lockh, LCK_PR);
3544 ldlm_lock_decref(lockh, LCK_PW);
3551 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3555 if (unlikely(mode == LCK_GROUP))
3556 ldlm_lock_decref_and_cancel(lockh, mode);
3558 ldlm_lock_decref(lockh, mode);
3563 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3564 __u32 mode, struct lustre_handle *lockh)
3567 RETURN(osc_cancel_base(lockh, mode));
3570 static int osc_cancel_unused(struct obd_export *exp,
3571 struct lov_stripe_md *lsm,
3572 ldlm_cancel_flags_t flags,
3575 struct obd_device *obd = class_exp2obd(exp);
3576 struct ldlm_res_id res_id, *resp = NULL;
3579 resp = osc_build_res_name(lsm->lsm_object_id,
3580 lsm->lsm_object_seq, &res_id);
3583 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3586 static int osc_statfs_interpret(const struct lu_env *env,
3587 struct ptlrpc_request *req,
3588 struct osc_async_args *aa, int rc)
3590 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3591 struct obd_statfs *msfs;
3596 /* The request has in fact never been sent
3597 * due to issues at a higher level (LOV).
3598 * Exit immediately since the caller is
3599 * aware of the problem and takes care
3600 * of the clean up */
3603 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3604 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3610 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3612 GOTO(out, rc = -EPROTO);
3615 /* Reinitialize the RDONLY and DEGRADED flags at the client
3616 * on each statfs, so they don't stay set permanently. */
3617 cfs_spin_lock(&cli->cl_oscc.oscc_lock);
3619 if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
3620 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3621 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
3622 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
3624 if (unlikely(msfs->os_state & OS_STATE_READONLY))
3625 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3626 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
3627 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
3629 /* Add a bit of hysteresis so this flag isn't continually flapping,
3630 * and ensure that new files don't get extremely fragmented due to
3631 * only a small amount of available space in the filesystem.
3632 * We want to set the NOSPC flag when there is less than ~0.1% free
3633 * and clear it when there is at least ~0.2% free space, so:
3634 * avail < ~0.1% max max = avail + used
3635 * 1025 * avail < avail + used used = blocks - free
3636 * 1024 * avail < used
3637 * 1024 * avail < blocks - free
3638 * avail < ((blocks - free) >> 10)
3640 * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
3641 * lose that amount of space so in those cases we report no space left
3642 * if their is less than 1 GB left. */
3643 used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
3644 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
3645 ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
3646 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
3647 else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3648 (msfs->os_ffree > 64) &&
3649 (msfs->os_bavail > (used << 1)))) {
3650 cli->cl_oscc.oscc_flags &= ~(OSCC_FLAG_NOSPC |
3651 OSCC_FLAG_NOSPC_BLK);
3654 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3655 (msfs->os_bavail < used)))
3656 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC_BLK;
3658 cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
3660 *aa->aa_oi->oi_osfs = *msfs;
3662 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3666 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3667 __u64 max_age, struct ptlrpc_request_set *rqset)
3669 struct ptlrpc_request *req;
3670 struct osc_async_args *aa;
3674 /* We could possibly pass max_age in the request (as an absolute
3675 * timestamp or a "seconds.usec ago") so the target can avoid doing
3676 * extra calls into the filesystem if that isn't necessary (e.g.
3677 * during mount that would help a bit). Having relative timestamps
3678 * is not so great if request processing is slow, while absolute
3679 * timestamps are not ideal because they need time synchronization. */
3680 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3684 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3686 ptlrpc_request_free(req);
3689 ptlrpc_request_set_replen(req);
3690 req->rq_request_portal = OST_CREATE_PORTAL;
3691 ptlrpc_at_set_req_timeout(req);
3693 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3694 /* procfs requests not want stat in wait for avoid deadlock */
3695 req->rq_no_resend = 1;
3696 req->rq_no_delay = 1;
3699 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3700 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3701 aa = ptlrpc_req_async_args(req);
3704 ptlrpc_set_add_req(rqset, req);
3708 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3709 __u64 max_age, __u32 flags)
3711 struct obd_statfs *msfs;
3712 struct ptlrpc_request *req;
3713 struct obd_import *imp = NULL;
3717 /*Since the request might also come from lprocfs, so we need
3718 *sync this with client_disconnect_export Bug15684*/
3719 cfs_down_read(&obd->u.cli.cl_sem);
3720 if (obd->u.cli.cl_import)
3721 imp = class_import_get(obd->u.cli.cl_import);
3722 cfs_up_read(&obd->u.cli.cl_sem);
3726 /* We could possibly pass max_age in the request (as an absolute
3727 * timestamp or a "seconds.usec ago") so the target can avoid doing
3728 * extra calls into the filesystem if that isn't necessary (e.g.
3729 * during mount that would help a bit). Having relative timestamps
3730 * is not so great if request processing is slow, while absolute
3731 * timestamps are not ideal because they need time synchronization. */
3732 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3734 class_import_put(imp);
3739 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3741 ptlrpc_request_free(req);
3744 ptlrpc_request_set_replen(req);
3745 req->rq_request_portal = OST_CREATE_PORTAL;
3746 ptlrpc_at_set_req_timeout(req);
3748 if (flags & OBD_STATFS_NODELAY) {
3749 /* procfs requests not want stat in wait for avoid deadlock */
3750 req->rq_no_resend = 1;
3751 req->rq_no_delay = 1;
3754 rc = ptlrpc_queue_wait(req);
3758 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3760 GOTO(out, rc = -EPROTO);
3767 ptlrpc_req_finished(req);
3771 /* Retrieve object striping information.
3773 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3774 * the maximum number of OST indices which will fit in the user buffer.
3775 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3777 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3779 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3780 struct lov_user_md_v3 lum, *lumk;
3781 struct lov_user_ost_data_v1 *lmm_objects;
3782 int rc = 0, lum_size;
3788 /* we only need the header part from user space to get lmm_magic and
3789 * lmm_stripe_count, (the header part is common to v1 and v3) */
3790 lum_size = sizeof(struct lov_user_md_v1);
3791 if (cfs_copy_from_user(&lum, lump, lum_size))
3794 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3795 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3798 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3799 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3800 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3801 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3803 /* we can use lov_mds_md_size() to compute lum_size
3804 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3805 if (lum.lmm_stripe_count > 0) {
3806 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3807 OBD_ALLOC(lumk, lum_size);
3811 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3812 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3814 lmm_objects = &(lumk->lmm_objects[0]);
3815 lmm_objects->l_object_id = lsm->lsm_object_id;
3817 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3821 lumk->lmm_object_id = lsm->lsm_object_id;
3822 lumk->lmm_object_seq = lsm->lsm_object_seq;
3823 lumk->lmm_stripe_count = 1;
3825 if (cfs_copy_to_user(lump, lumk, lum_size))
3829 OBD_FREE(lumk, lum_size);
3835 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3836 void *karg, void *uarg)
3838 struct obd_device *obd = exp->exp_obd;
3839 struct obd_ioctl_data *data = karg;
3843 if (!cfs_try_module_get(THIS_MODULE)) {
3844 CERROR("Can't get module. Is it alive?");
3848 case OBD_IOC_LOV_GET_CONFIG: {
3850 struct lov_desc *desc;
3851 struct obd_uuid uuid;
3855 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3856 GOTO(out, err = -EINVAL);
3858 data = (struct obd_ioctl_data *)buf;
3860 if (sizeof(*desc) > data->ioc_inllen1) {
3861 obd_ioctl_freedata(buf, len);
3862 GOTO(out, err = -EINVAL);
3865 if (data->ioc_inllen2 < sizeof(uuid)) {
3866 obd_ioctl_freedata(buf, len);
3867 GOTO(out, err = -EINVAL);
3870 desc = (struct lov_desc *)data->ioc_inlbuf1;
3871 desc->ld_tgt_count = 1;
3872 desc->ld_active_tgt_count = 1;
3873 desc->ld_default_stripe_count = 1;
3874 desc->ld_default_stripe_size = 0;
3875 desc->ld_default_stripe_offset = 0;
3876 desc->ld_pattern = 0;
3877 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3879 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3881 err = cfs_copy_to_user((void *)uarg, buf, len);
3884 obd_ioctl_freedata(buf, len);
3887 case LL_IOC_LOV_SETSTRIPE:
3888 err = obd_alloc_memmd(exp, karg);
3892 case LL_IOC_LOV_GETSTRIPE:
3893 err = osc_getstripe(karg, uarg);
3895 case OBD_IOC_CLIENT_RECOVER:
3896 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3897 data->ioc_inlbuf1, 0);
3901 case IOC_OSC_SET_ACTIVE:
3902 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3905 case OBD_IOC_POLL_QUOTACHECK:
3906 err = osc_quota_poll_check(exp, (struct if_quotacheck *)karg);
3908 case OBD_IOC_PING_TARGET:
3909 err = ptlrpc_obd_ping(obd);
3912 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3913 cmd, cfs_curproc_comm());
3914 GOTO(out, err = -ENOTTY);
3917 cfs_module_put(THIS_MODULE);
3921 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3922 void *key, __u32 *vallen, void *val,
3923 struct lov_stripe_md *lsm)
3926 if (!vallen || !val)
3929 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3930 __u32 *stripe = val;
3931 *vallen = sizeof(*stripe);
3934 } else if (KEY_IS(KEY_LAST_ID)) {
3935 struct ptlrpc_request *req;
3940 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3941 &RQF_OST_GET_INFO_LAST_ID);
3945 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3946 RCL_CLIENT, keylen);
3947 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3949 ptlrpc_request_free(req);
3953 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3954 memcpy(tmp, key, keylen);
3956 req->rq_no_delay = req->rq_no_resend = 1;
3957 ptlrpc_request_set_replen(req);
3958 rc = ptlrpc_queue_wait(req);
3962 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3964 GOTO(out, rc = -EPROTO);
3966 *((obd_id *)val) = *reply;
3968 ptlrpc_req_finished(req);
3970 } else if (KEY_IS(KEY_FIEMAP)) {
3971 struct ptlrpc_request *req;
3972 struct ll_user_fiemap *reply;
3976 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3977 &RQF_OST_GET_INFO_FIEMAP);
3981 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3982 RCL_CLIENT, keylen);
3983 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3984 RCL_CLIENT, *vallen);
3985 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3986 RCL_SERVER, *vallen);
3988 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3990 ptlrpc_request_free(req);
3994 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3995 memcpy(tmp, key, keylen);
3996 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3997 memcpy(tmp, val, *vallen);
3999 ptlrpc_request_set_replen(req);
4000 rc = ptlrpc_queue_wait(req);
4004 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
4006 GOTO(out1, rc = -EPROTO);
4008 memcpy(val, reply, *vallen);
4010 ptlrpc_req_finished(req);
4018 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
4020 struct llog_ctxt *ctxt;
4024 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
4026 rc = llog_initiator_connect(ctxt);
4027 llog_ctxt_put(ctxt);
4029 /* XXX return an error? skip setting below flags? */
4032 cfs_spin_lock(&imp->imp_lock);
4033 imp->imp_server_timeout = 1;
4034 imp->imp_pingable = 1;
4035 cfs_spin_unlock(&imp->imp_lock);
4036 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
4041 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
4042 struct ptlrpc_request *req,
4049 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
4052 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
4053 void *key, obd_count vallen, void *val,
4054 struct ptlrpc_request_set *set)
4056 struct ptlrpc_request *req;
4057 struct obd_device *obd = exp->exp_obd;
4058 struct obd_import *imp = class_exp2cliimp(exp);
4063 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
4065 if (KEY_IS(KEY_NEXT_ID)) {
4067 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4069 if (vallen != sizeof(obd_id))
4074 if (vallen != sizeof(obd_id))
4077 /* avoid race between allocate new object and set next id
4078 * from ll_sync thread */
4079 cfs_spin_lock(&oscc->oscc_lock);
4080 new_val = *((obd_id*)val) + 1;
4081 if (new_val > oscc->oscc_next_id)
4082 oscc->oscc_next_id = new_val;
4083 cfs_spin_unlock(&oscc->oscc_lock);
4084 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
4085 exp->exp_obd->obd_name,
4086 obd->u.cli.cl_oscc.oscc_next_id);
4091 if (KEY_IS(KEY_CHECKSUM)) {
4092 if (vallen != sizeof(int))
4094 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
4098 if (KEY_IS(KEY_SPTLRPC_CONF)) {
4099 sptlrpc_conf_client_adapt(obd);
4103 if (KEY_IS(KEY_FLUSH_CTX)) {
4104 sptlrpc_import_flush_my_ctx(imp);
4108 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
4111 /* We pass all other commands directly to OST. Since nobody calls osc
4112 methods directly and everybody is supposed to go through LOV, we
4113 assume lov checked invalid values for us.
4114 The only recognised values so far are evict_by_nid and mds_conn.
4115 Even if something bad goes through, we'd get a -EINVAL from OST
4118 if (KEY_IS(KEY_GRANT_SHRINK))
4119 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
4121 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
4126 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
4127 RCL_CLIENT, keylen);
4128 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
4129 RCL_CLIENT, vallen);
4130 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
4132 ptlrpc_request_free(req);
4136 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
4137 memcpy(tmp, key, keylen);
4138 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
4139 memcpy(tmp, val, vallen);
4141 if (KEY_IS(KEY_MDS_CONN)) {
4142 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4144 oscc->oscc_oa.o_seq = (*(__u32 *)val);
4145 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
4146 LASSERT_SEQ_IS_MDT(oscc->oscc_oa.o_seq);
4147 req->rq_no_delay = req->rq_no_resend = 1;
4148 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
4149 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
4150 struct osc_grant_args *aa;
4153 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
4154 aa = ptlrpc_req_async_args(req);
4157 ptlrpc_req_finished(req);
4160 *oa = ((struct ost_body *)val)->oa;
4162 req->rq_interpret_reply = osc_shrink_grant_interpret;
4165 ptlrpc_request_set_replen(req);
4166 if (!KEY_IS(KEY_GRANT_SHRINK)) {
4167 LASSERT(set != NULL);
4168 ptlrpc_set_add_req(set, req);
4169 ptlrpc_check_set(NULL, set);
4171 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
4177 static struct llog_operations osc_size_repl_logops = {
4178 lop_cancel: llog_obd_repl_cancel
4181 static struct llog_operations osc_mds_ost_orig_logops;
4183 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4184 struct obd_device *tgt, struct llog_catid *catid)
4189 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4190 &catid->lci_logid, &osc_mds_ost_orig_logops);
4192 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4196 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4197 NULL, &osc_size_repl_logops);
4199 struct llog_ctxt *ctxt =
4200 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4203 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4208 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4209 obd->obd_name, tgt->obd_name, catid, rc);
4210 CERROR("logid "LPX64":0x%x\n",
4211 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4216 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4217 struct obd_device *disk_obd, int *index)
4219 struct llog_catid catid;
4220 static char name[32] = CATLIST;
4224 LASSERT(olg == &obd->obd_olg);
4226 cfs_mutex_down(&olg->olg_cat_processing);
4227 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4229 CERROR("rc: %d\n", rc);
4233 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4234 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4235 catid.lci_logid.lgl_oseq, catid.lci_logid.lgl_ogen);
4237 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4239 CERROR("rc: %d\n", rc);
4243 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4245 CERROR("rc: %d\n", rc);
4250 cfs_mutex_up(&olg->olg_cat_processing);
4255 static int osc_llog_finish(struct obd_device *obd, int count)
4257 struct llog_ctxt *ctxt;
4258 int rc = 0, rc2 = 0;
4261 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4263 rc = llog_cleanup(ctxt);
4265 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4267 rc2 = llog_cleanup(ctxt);
4274 static int osc_reconnect(const struct lu_env *env,
4275 struct obd_export *exp, struct obd_device *obd,
4276 struct obd_uuid *cluuid,
4277 struct obd_connect_data *data,
4280 struct client_obd *cli = &obd->u.cli;
4282 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4285 client_obd_list_lock(&cli->cl_loi_list_lock);
4286 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
4287 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4288 lost_grant = cli->cl_lost_grant;
4289 cli->cl_lost_grant = 0;
4290 client_obd_list_unlock(&cli->cl_loi_list_lock);
4292 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4293 "cl_dirty: %ld cl_lost_grant: %ld\n", data->ocd_grant,
4294 cli->cl_avail_grant, cli->cl_dirty, lost_grant);
4295 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4296 " ocd_grant: %d\n", data->ocd_connect_flags,
4297 data->ocd_version, data->ocd_grant);
4303 static int osc_disconnect(struct obd_export *exp)
4305 struct obd_device *obd = class_exp2obd(exp);
4306 struct llog_ctxt *ctxt;
4309 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4311 if (obd->u.cli.cl_conn_count == 1) {
4312 /* Flush any remaining cancel messages out to the
4314 llog_sync(ctxt, exp);
4316 llog_ctxt_put(ctxt);
4318 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4322 rc = client_disconnect_export(exp);
4324 * Initially we put del_shrink_grant before disconnect_export, but it
4325 * causes the following problem if setup (connect) and cleanup
4326 * (disconnect) are tangled together.
4327 * connect p1 disconnect p2
4328 * ptlrpc_connect_import
4329 * ............... class_manual_cleanup
4332 * ptlrpc_connect_interrupt
4334 * add this client to shrink list
4336 * Bang! pinger trigger the shrink.
4337 * So the osc should be disconnected from the shrink list, after we
4338 * are sure the import has been destroyed. BUG18662
4340 if (obd->u.cli.cl_import == NULL)
4341 osc_del_shrink_grant(&obd->u.cli);
4345 static int osc_import_event(struct obd_device *obd,
4346 struct obd_import *imp,
4347 enum obd_import_event event)
4349 struct client_obd *cli;
4353 LASSERT(imp->imp_obd == obd);
4356 case IMP_EVENT_DISCON: {
4357 /* Only do this on the MDS OSC's */
4358 if (imp->imp_server_timeout) {
4359 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4361 cfs_spin_lock(&oscc->oscc_lock);
4362 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4363 cfs_spin_unlock(&oscc->oscc_lock);
4366 client_obd_list_lock(&cli->cl_loi_list_lock);
4367 cli->cl_avail_grant = 0;
4368 cli->cl_lost_grant = 0;
4369 client_obd_list_unlock(&cli->cl_loi_list_lock);
4372 case IMP_EVENT_INACTIVE: {
4373 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4376 case IMP_EVENT_INVALIDATE: {
4377 struct ldlm_namespace *ns = obd->obd_namespace;
4381 env = cl_env_get(&refcheck);
4385 client_obd_list_lock(&cli->cl_loi_list_lock);
4386 /* all pages go to failing rpcs due to the invalid
4388 osc_check_rpcs(env, cli);
4389 client_obd_list_unlock(&cli->cl_loi_list_lock);
4391 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4392 cl_env_put(env, &refcheck);
4397 case IMP_EVENT_ACTIVE: {
4398 /* Only do this on the MDS OSC's */
4399 if (imp->imp_server_timeout) {
4400 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4402 cfs_spin_lock(&oscc->oscc_lock);
4403 oscc->oscc_flags &= ~(OSCC_FLAG_NOSPC |
4404 OSCC_FLAG_NOSPC_BLK);
4405 cfs_spin_unlock(&oscc->oscc_lock);
4407 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4410 case IMP_EVENT_OCD: {
4411 struct obd_connect_data *ocd = &imp->imp_connect_data;
4413 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4414 osc_init_grant(&obd->u.cli, ocd);
4417 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4418 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4420 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4423 case IMP_EVENT_DEACTIVATE: {
4424 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
4427 case IMP_EVENT_ACTIVATE: {
4428 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
4432 CERROR("Unknown import event %d\n", event);
4439 * Determine whether the lock can be canceled before replaying the lock
4440 * during recovery, see bug16774 for detailed information.
4442 * \retval zero the lock can't be canceled
4443 * \retval other ok to cancel
4445 static int osc_cancel_for_recovery(struct ldlm_lock *lock)
4447 check_res_locked(lock->l_resource);
4450 * Cancel all unused extent lock in granted mode LCK_PR or LCK_CR.
4452 * XXX as a future improvement, we can also cancel unused write lock
4453 * if it doesn't have dirty data and active mmaps.
4455 if (lock->l_resource->lr_type == LDLM_EXTENT &&
4456 (lock->l_granted_mode == LCK_PR ||
4457 lock->l_granted_mode == LCK_CR) &&
4458 (osc_dlm_lock_pageref(lock) == 0))
4464 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4466 struct client_obd *cli = &obd->u.cli;
4471 rc = ptlrpcd_addref();
4475 rc = client_obd_setup(obd, lcfg);
4478 handler = ptlrpcd_alloc_work(cli->cl_import,
4479 brw_queue_work, cli);
4480 if (!IS_ERR(handler))
4481 cli->cl_writeback_work = handler;
4483 rc = PTR_ERR(handler);
4487 struct lprocfs_static_vars lvars = { 0 };
4489 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4490 lprocfs_osc_init_vars(&lvars);
4491 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4492 lproc_osc_attach_seqstat(obd);
4493 sptlrpc_lprocfs_cliobd_attach(obd);
4494 ptlrpc_lprocfs_register_obd(obd);
4498 /* We need to allocate a few requests more, because
4499 brw_interpret tries to create new requests before freeing
4500 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4501 reserved, but I afraid that might be too much wasted RAM
4502 in fact, so 2 is just my guess and still should work. */
4503 cli->cl_import->imp_rq_pool =
4504 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4506 ptlrpc_add_rqs_to_pool);
4508 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4509 cfs_sema_init(&cli->cl_grant_sem, 1);
4511 ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
4519 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4525 case OBD_CLEANUP_EARLY: {
4526 struct obd_import *imp;
4527 imp = obd->u.cli.cl_import;
4528 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4529 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4530 ptlrpc_deactivate_import(imp);
4531 cfs_spin_lock(&imp->imp_lock);
4532 imp->imp_pingable = 0;
4533 cfs_spin_unlock(&imp->imp_lock);
4536 case OBD_CLEANUP_EXPORTS: {
4537 struct client_obd *cli = &obd->u.cli;
4539 * for echo client, export may be on zombie list, wait for
4540 * zombie thread to cull it, because cli.cl_import will be
4541 * cleared in client_disconnect_export():
4542 * class_export_destroy() -> obd_cleanup() ->
4543 * echo_device_free() -> echo_client_cleanup() ->
4544 * obd_disconnect() -> osc_disconnect() ->
4545 * client_disconnect_export()
4547 obd_zombie_barrier();
4548 if (cli->cl_writeback_work) {
4549 ptlrpcd_destroy_work(cli->cl_writeback_work);
4550 cli->cl_writeback_work = NULL;
4552 obd_cleanup_client_import(obd);
4553 ptlrpc_lprocfs_unregister_obd(obd);
4554 lprocfs_obd_cleanup(obd);
4555 rc = obd_llog_finish(obd, 0);
4557 CERROR("failed to cleanup llogging subsystems\n");
4564 int osc_cleanup(struct obd_device *obd)
4570 /* free memory of osc quota cache */
4571 osc_quota_cleanup(obd);
4573 rc = client_obd_cleanup(obd);
4579 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4581 struct lprocfs_static_vars lvars = { 0 };
4584 lprocfs_osc_init_vars(&lvars);
4586 switch (lcfg->lcfg_command) {
4588 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4598 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4600 return osc_process_config_base(obd, buf);
4603 struct obd_ops osc_obd_ops = {
4604 .o_owner = THIS_MODULE,
4605 .o_setup = osc_setup,
4606 .o_precleanup = osc_precleanup,
4607 .o_cleanup = osc_cleanup,
4608 .o_add_conn = client_import_add_conn,
4609 .o_del_conn = client_import_del_conn,
4610 .o_connect = client_connect_import,
4611 .o_reconnect = osc_reconnect,
4612 .o_disconnect = osc_disconnect,
4613 .o_statfs = osc_statfs,
4614 .o_statfs_async = osc_statfs_async,
4615 .o_packmd = osc_packmd,
4616 .o_unpackmd = osc_unpackmd,
4617 .o_precreate = osc_precreate,
4618 .o_create = osc_create,
4619 .o_create_async = osc_create_async,
4620 .o_destroy = osc_destroy,
4621 .o_getattr = osc_getattr,
4622 .o_getattr_async = osc_getattr_async,
4623 .o_setattr = osc_setattr,
4624 .o_setattr_async = osc_setattr_async,
4626 .o_punch = osc_punch,
4628 .o_enqueue = osc_enqueue,
4629 .o_change_cbdata = osc_change_cbdata,
4630 .o_find_cbdata = osc_find_cbdata,
4631 .o_cancel = osc_cancel,
4632 .o_cancel_unused = osc_cancel_unused,
4633 .o_iocontrol = osc_iocontrol,
4634 .o_get_info = osc_get_info,
4635 .o_set_info_async = osc_set_info_async,
4636 .o_import_event = osc_import_event,
4637 .o_llog_init = osc_llog_init,
4638 .o_llog_finish = osc_llog_finish,
4639 .o_process_config = osc_process_config,
4640 .o_quotactl = osc_quotactl,
4641 .o_quotacheck = osc_quotacheck,
4642 .o_quota_adjust_qunit = osc_quota_adjust_qunit,
4645 extern struct lu_kmem_descr osc_caches[];
4646 extern cfs_spinlock_t osc_ast_guard;
4647 extern cfs_lock_class_key_t osc_ast_guard_class;
4649 int __init osc_init(void)
4651 struct lprocfs_static_vars lvars = { 0 };
4655 /* print an address of _any_ initialized kernel symbol from this
4656 * module, to allow debugging with gdb that doesn't support data
4657 * symbols from modules.*/
4658 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
4660 rc = lu_kmem_init(osc_caches);
4662 lprocfs_osc_init_vars(&lvars);
4665 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4666 LUSTRE_OSC_NAME, &osc_device_type);
4668 lu_kmem_fini(osc_caches);
4672 cfs_spin_lock_init(&osc_ast_guard);
4673 cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4675 osc_mds_ost_orig_logops = llog_lvfs_ops;
4676 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4677 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4678 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4679 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4685 static void /*__exit*/ osc_exit(void)
4687 lu_device_type_fini(&osc_device_type);
4690 class_unregister_type(LUSTRE_OSC_NAME);
4691 lu_kmem_fini(osc_caches);
4694 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4695 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4696 MODULE_LICENSE("GPL");
4698 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob