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 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_OSC
42 #include <libcfs/libcfs.h>
45 # include <liblustre.h>
48 #include <lustre_dlm.h>
49 #include <lustre_net.h>
50 #include <lustre/lustre_user.h>
51 #include <obd_cksum.h>
59 #include <lustre_ha.h>
60 #include <lprocfs_status.h>
61 #include <lustre_log.h>
62 #include <lustre_debug.h>
63 #include <lustre_param.h>
64 #include "osc_internal.h"
66 static quota_interface_t *quota_interface = NULL;
67 extern quota_interface_t osc_quota_interface;
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 int osc_cleanup(struct obd_device *obd);
74 /* Pack OSC object metadata for disk storage (LE byte order). */
75 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
76 struct lov_stripe_md *lsm)
81 lmm_size = sizeof(**lmmp);
86 OBD_FREE(*lmmp, lmm_size);
92 OBD_ALLOC(*lmmp, lmm_size);
98 LASSERT(lsm->lsm_object_id);
99 LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
100 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
101 (*lmmp)->lmm_object_seq = cpu_to_le64(lsm->lsm_object_seq);
107 /* Unpack OSC object metadata from disk storage (LE byte order). */
108 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
109 struct lov_mds_md *lmm, int lmm_bytes)
115 if (lmm_bytes < sizeof (*lmm)) {
116 CERROR("lov_mds_md too small: %d, need %d\n",
117 lmm_bytes, (int)sizeof(*lmm));
120 /* XXX LOV_MAGIC etc check? */
122 if (lmm->lmm_object_id == 0) {
123 CERROR("lov_mds_md: zero lmm_object_id\n");
128 lsm_size = lov_stripe_md_size(1);
132 if (*lsmp != NULL && lmm == NULL) {
133 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
134 OBD_FREE(*lsmp, lsm_size);
140 OBD_ALLOC(*lsmp, lsm_size);
143 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
144 if ((*lsmp)->lsm_oinfo[0] == NULL) {
145 OBD_FREE(*lsmp, lsm_size);
148 loi_init((*lsmp)->lsm_oinfo[0]);
152 /* XXX zero *lsmp? */
153 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
154 (*lsmp)->lsm_object_seq = le64_to_cpu (lmm->lmm_object_seq);
155 LASSERT((*lsmp)->lsm_object_id);
156 LASSERT_SEQ_IS_MDT((*lsmp)->lsm_object_seq);
159 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
164 static inline void osc_pack_capa(struct ptlrpc_request *req,
165 struct ost_body *body, void *capa)
167 struct obd_capa *oc = (struct obd_capa *)capa;
168 struct lustre_capa *c;
173 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
176 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
177 DEBUG_CAPA(D_SEC, c, "pack");
180 static inline void osc_pack_req_body(struct ptlrpc_request *req,
181 struct obd_info *oinfo)
183 struct ost_body *body;
185 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
188 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
189 osc_pack_capa(req, body, oinfo->oi_capa);
192 static inline void osc_set_capa_size(struct ptlrpc_request *req,
193 const struct req_msg_field *field,
197 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
199 /* it is already calculated as sizeof struct obd_capa */
203 static int osc_getattr_interpret(const struct lu_env *env,
204 struct ptlrpc_request *req,
205 struct osc_async_args *aa, int rc)
207 struct ost_body *body;
213 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
215 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
216 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
218 /* This should really be sent by the OST */
219 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
220 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
222 CDEBUG(D_INFO, "can't unpack ost_body\n");
224 aa->aa_oi->oi_oa->o_valid = 0;
227 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
231 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
232 struct ptlrpc_request_set *set)
234 struct ptlrpc_request *req;
235 struct osc_async_args *aa;
239 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
243 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
244 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
246 ptlrpc_request_free(req);
250 osc_pack_req_body(req, oinfo);
252 ptlrpc_request_set_replen(req);
253 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
255 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
256 aa = ptlrpc_req_async_args(req);
259 ptlrpc_set_add_req(set, req);
263 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
265 struct ptlrpc_request *req;
266 struct ost_body *body;
270 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
274 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
275 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
277 ptlrpc_request_free(req);
281 osc_pack_req_body(req, oinfo);
283 ptlrpc_request_set_replen(req);
285 rc = ptlrpc_queue_wait(req);
289 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
291 GOTO(out, rc = -EPROTO);
293 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
294 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
296 /* This should really be sent by the OST */
297 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
298 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
302 ptlrpc_req_finished(req);
306 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
307 struct obd_trans_info *oti)
309 struct ptlrpc_request *req;
310 struct ost_body *body;
314 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
316 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
320 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
321 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
323 ptlrpc_request_free(req);
327 osc_pack_req_body(req, oinfo);
329 ptlrpc_request_set_replen(req);
331 rc = ptlrpc_queue_wait(req);
335 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
337 GOTO(out, rc = -EPROTO);
339 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
343 ptlrpc_req_finished(req);
347 static int osc_setattr_interpret(const struct lu_env *env,
348 struct ptlrpc_request *req,
349 struct osc_setattr_args *sa, int rc)
351 struct ost_body *body;
357 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
359 GOTO(out, rc = -EPROTO);
361 lustre_get_wire_obdo(sa->sa_oa, &body->oa);
363 rc = sa->sa_upcall(sa->sa_cookie, rc);
367 int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
368 struct obd_trans_info *oti,
369 obd_enqueue_update_f upcall, void *cookie,
370 struct ptlrpc_request_set *rqset)
372 struct ptlrpc_request *req;
373 struct osc_setattr_args *sa;
377 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
381 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
382 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
384 ptlrpc_request_free(req);
388 if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
389 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
391 osc_pack_req_body(req, oinfo);
393 ptlrpc_request_set_replen(req);
395 /* do mds to ost setattr asynchronously */
397 /* Do not wait for response. */
398 ptlrpcd_add_req(req, PSCOPE_OTHER);
400 req->rq_interpret_reply =
401 (ptlrpc_interpterer_t)osc_setattr_interpret;
403 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
404 sa = ptlrpc_req_async_args(req);
405 sa->sa_oa = oinfo->oi_oa;
406 sa->sa_upcall = upcall;
407 sa->sa_cookie = cookie;
409 if (rqset == PTLRPCD_SET)
410 ptlrpcd_add_req(req, PSCOPE_OTHER);
412 ptlrpc_set_add_req(rqset, req);
418 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
419 struct obd_trans_info *oti,
420 struct ptlrpc_request_set *rqset)
422 return osc_setattr_async_base(exp, oinfo, oti,
423 oinfo->oi_cb_up, oinfo, rqset);
426 int osc_real_create(struct obd_export *exp, struct obdo *oa,
427 struct lov_stripe_md **ea, struct obd_trans_info *oti)
429 struct ptlrpc_request *req;
430 struct ost_body *body;
431 struct lov_stripe_md *lsm;
440 rc = obd_alloc_memmd(exp, &lsm);
445 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
447 GOTO(out, rc = -ENOMEM);
449 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
451 ptlrpc_request_free(req);
455 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
457 lustre_set_wire_obdo(&body->oa, oa);
459 ptlrpc_request_set_replen(req);
461 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
462 oa->o_flags == OBD_FL_DELORPHAN) {
464 "delorphan from OST integration");
465 /* Don't resend the delorphan req */
466 req->rq_no_resend = req->rq_no_delay = 1;
469 rc = ptlrpc_queue_wait(req);
473 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
475 GOTO(out_req, rc = -EPROTO);
477 lustre_get_wire_obdo(oa, &body->oa);
479 /* This should really be sent by the OST */
480 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
481 oa->o_valid |= OBD_MD_FLBLKSZ;
483 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
484 * have valid lsm_oinfo data structs, so don't go touching that.
485 * This needs to be fixed in a big way.
487 lsm->lsm_object_id = oa->o_id;
488 lsm->lsm_object_seq = oa->o_seq;
492 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
494 if (oa->o_valid & OBD_MD_FLCOOKIE) {
495 if (!oti->oti_logcookies)
496 oti_alloc_cookies(oti, 1);
497 *oti->oti_logcookies = oa->o_lcookie;
501 CDEBUG(D_HA, "transno: "LPD64"\n",
502 lustre_msg_get_transno(req->rq_repmsg));
504 ptlrpc_req_finished(req);
507 obd_free_memmd(exp, &lsm);
511 int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
512 obd_enqueue_update_f upcall, void *cookie,
513 struct ptlrpc_request_set *rqset)
515 struct ptlrpc_request *req;
516 struct osc_setattr_args *sa;
517 struct ost_body *body;
521 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
525 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
526 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
528 ptlrpc_request_free(req);
531 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
532 ptlrpc_at_set_req_timeout(req);
534 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
536 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
537 osc_pack_capa(req, body, oinfo->oi_capa);
539 ptlrpc_request_set_replen(req);
542 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
543 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
544 sa = ptlrpc_req_async_args(req);
545 sa->sa_oa = oinfo->oi_oa;
546 sa->sa_upcall = upcall;
547 sa->sa_cookie = cookie;
548 if (rqset == PTLRPCD_SET)
549 ptlrpcd_add_req(req, PSCOPE_OTHER);
551 ptlrpc_set_add_req(rqset, req);
556 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
557 struct obd_trans_info *oti,
558 struct ptlrpc_request_set *rqset)
560 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
561 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
562 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
563 return osc_punch_base(exp, oinfo,
564 oinfo->oi_cb_up, oinfo, rqset);
567 static int osc_sync(struct obd_export *exp, struct obdo *oa,
568 struct lov_stripe_md *md, obd_size start, obd_size end,
571 struct ptlrpc_request *req;
572 struct ost_body *body;
577 CDEBUG(D_INFO, "oa NULL\n");
581 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
585 osc_set_capa_size(req, &RMF_CAPA1, capa);
586 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
588 ptlrpc_request_free(req);
592 /* overload the size and blocks fields in the oa with start/end */
593 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
595 lustre_set_wire_obdo(&body->oa, oa);
596 body->oa.o_size = start;
597 body->oa.o_blocks = end;
598 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
599 osc_pack_capa(req, body, capa);
601 ptlrpc_request_set_replen(req);
603 rc = ptlrpc_queue_wait(req);
607 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
609 GOTO(out, rc = -EPROTO);
611 lustre_get_wire_obdo(oa, &body->oa);
615 ptlrpc_req_finished(req);
619 /* Find and cancel locally locks matched by @mode in the resource found by
620 * @objid. Found locks are added into @cancel list. Returns the amount of
621 * locks added to @cancels list. */
622 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
624 ldlm_mode_t mode, int lock_flags)
626 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
627 struct ldlm_res_id res_id;
628 struct ldlm_resource *res;
632 osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
633 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
637 LDLM_RESOURCE_ADDREF(res);
638 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
639 lock_flags, 0, NULL);
640 LDLM_RESOURCE_DELREF(res);
641 ldlm_resource_putref(res);
645 static int osc_destroy_interpret(const struct lu_env *env,
646 struct ptlrpc_request *req, void *data,
649 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
651 cfs_atomic_dec(&cli->cl_destroy_in_flight);
652 cfs_waitq_signal(&cli->cl_destroy_waitq);
656 static int osc_can_send_destroy(struct client_obd *cli)
658 if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
659 cli->cl_max_rpcs_in_flight) {
660 /* The destroy request can be sent */
663 if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
664 cli->cl_max_rpcs_in_flight) {
666 * The counter has been modified between the two atomic
669 cfs_waitq_signal(&cli->cl_destroy_waitq);
674 /* Destroy requests can be async always on the client, and we don't even really
675 * care about the return code since the client cannot do anything at all about
677 * When the MDS is unlinking a filename, it saves the file objects into a
678 * recovery llog, and these object records are cancelled when the OST reports
679 * they were destroyed and sync'd to disk (i.e. transaction committed).
680 * If the client dies, or the OST is down when the object should be destroyed,
681 * the records are not cancelled, and when the OST reconnects to the MDS next,
682 * it will retrieve the llog unlink logs and then sends the log cancellation
683 * cookies to the MDS after committing destroy transactions. */
684 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
685 struct lov_stripe_md *ea, struct obd_trans_info *oti,
686 struct obd_export *md_export, void *capa)
688 struct client_obd *cli = &exp->exp_obd->u.cli;
689 struct ptlrpc_request *req;
690 struct ost_body *body;
691 CFS_LIST_HEAD(cancels);
696 CDEBUG(D_INFO, "oa NULL\n");
700 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
701 LDLM_FL_DISCARD_DATA);
703 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
705 ldlm_lock_list_put(&cancels, l_bl_ast, count);
709 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
710 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
713 ptlrpc_request_free(req);
717 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
718 ptlrpc_at_set_req_timeout(req);
720 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
721 oa->o_lcookie = *oti->oti_logcookies;
722 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
724 lustre_set_wire_obdo(&body->oa, oa);
726 osc_pack_capa(req, body, (struct obd_capa *)capa);
727 ptlrpc_request_set_replen(req);
729 /* don't throttle destroy RPCs for the MDT */
730 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
731 req->rq_interpret_reply = osc_destroy_interpret;
732 if (!osc_can_send_destroy(cli)) {
733 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
737 * Wait until the number of on-going destroy RPCs drops
738 * under max_rpc_in_flight
740 l_wait_event_exclusive(cli->cl_destroy_waitq,
741 osc_can_send_destroy(cli), &lwi);
745 /* Do not wait for response */
746 ptlrpcd_add_req(req, PSCOPE_OTHER);
750 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
753 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
755 LASSERT(!(oa->o_valid & bits));
758 client_obd_list_lock(&cli->cl_loi_list_lock);
759 oa->o_dirty = cli->cl_dirty;
760 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
761 CERROR("dirty %lu - %lu > dirty_max %lu\n",
762 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
764 } else if (cfs_atomic_read(&obd_dirty_pages) -
765 cfs_atomic_read(&obd_dirty_transit_pages) >
766 obd_max_dirty_pages + 1){
767 /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
768 * not covered by a lock thus they may safely race and trip
769 * this CERROR() unless we add in a small fudge factor (+1). */
770 CERROR("dirty %d - %d > system dirty_max %d\n",
771 cfs_atomic_read(&obd_dirty_pages),
772 cfs_atomic_read(&obd_dirty_transit_pages),
773 obd_max_dirty_pages);
775 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
776 CERROR("dirty %lu - dirty_max %lu too big???\n",
777 cli->cl_dirty, cli->cl_dirty_max);
780 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
781 (cli->cl_max_rpcs_in_flight + 1);
782 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
784 oa->o_grant = cli->cl_avail_grant;
785 oa->o_dropped = cli->cl_lost_grant;
786 cli->cl_lost_grant = 0;
787 client_obd_list_unlock(&cli->cl_loi_list_lock);
788 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
789 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
793 static void osc_update_next_shrink(struct client_obd *cli)
795 cli->cl_next_shrink_grant =
796 cfs_time_shift(cli->cl_grant_shrink_interval);
797 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
798 cli->cl_next_shrink_grant);
801 /* caller must hold loi_list_lock */
802 static void osc_consume_write_grant(struct client_obd *cli,
803 struct brw_page *pga)
805 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
806 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
807 cfs_atomic_inc(&obd_dirty_pages);
808 cli->cl_dirty += CFS_PAGE_SIZE;
809 cli->cl_avail_grant -= CFS_PAGE_SIZE;
810 pga->flag |= OBD_BRW_FROM_GRANT;
811 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
812 CFS_PAGE_SIZE, pga, pga->pg);
813 LASSERT(cli->cl_avail_grant >= 0);
814 osc_update_next_shrink(cli);
817 /* the companion to osc_consume_write_grant, called when a brw has completed.
818 * must be called with the loi lock held. */
819 static void osc_release_write_grant(struct client_obd *cli,
820 struct brw_page *pga, int sent)
822 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
825 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
826 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
831 pga->flag &= ~OBD_BRW_FROM_GRANT;
832 cfs_atomic_dec(&obd_dirty_pages);
833 cli->cl_dirty -= CFS_PAGE_SIZE;
834 if (pga->flag & OBD_BRW_NOCACHE) {
835 pga->flag &= ~OBD_BRW_NOCACHE;
836 cfs_atomic_dec(&obd_dirty_transit_pages);
837 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
840 cli->cl_lost_grant += CFS_PAGE_SIZE;
841 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
842 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
843 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
844 /* For short writes we shouldn't count parts of pages that
845 * span a whole block on the OST side, or our accounting goes
846 * wrong. Should match the code in filter_grant_check. */
847 int offset = pga->off & ~CFS_PAGE_MASK;
848 int count = pga->count + (offset & (blocksize - 1));
849 int end = (offset + pga->count) & (blocksize - 1);
851 count += blocksize - end;
853 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
854 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
855 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
856 cli->cl_avail_grant, cli->cl_dirty);
862 static unsigned long rpcs_in_flight(struct client_obd *cli)
864 return cli->cl_r_in_flight + cli->cl_w_in_flight;
867 /* caller must hold loi_list_lock */
868 void osc_wake_cache_waiters(struct client_obd *cli)
871 struct osc_cache_waiter *ocw;
874 cfs_list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
875 /* if we can't dirty more, we must wait until some is written */
876 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
877 (cfs_atomic_read(&obd_dirty_pages) + 1 >
878 obd_max_dirty_pages)) {
879 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
880 "osc max %ld, sys max %d\n", cli->cl_dirty,
881 cli->cl_dirty_max, obd_max_dirty_pages);
885 /* if still dirty cache but no grant wait for pending RPCs that
886 * may yet return us some grant before doing sync writes */
887 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
888 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
889 cli->cl_w_in_flight);
893 ocw = cfs_list_entry(l, struct osc_cache_waiter, ocw_entry);
894 cfs_list_del_init(&ocw->ocw_entry);
895 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
896 /* no more RPCs in flight to return grant, do sync IO */
897 ocw->ocw_rc = -EDQUOT;
898 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
900 osc_consume_write_grant(cli,
901 &ocw->ocw_oap->oap_brw_page);
904 cfs_waitq_signal(&ocw->ocw_waitq);
910 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
912 client_obd_list_lock(&cli->cl_loi_list_lock);
913 cli->cl_avail_grant += grant;
914 client_obd_list_unlock(&cli->cl_loi_list_lock);
917 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
919 if (body->oa.o_valid & OBD_MD_FLGRANT) {
920 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
921 __osc_update_grant(cli, body->oa.o_grant);
925 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
926 void *key, obd_count vallen, void *val,
927 struct ptlrpc_request_set *set);
929 static int osc_shrink_grant_interpret(const struct lu_env *env,
930 struct ptlrpc_request *req,
933 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
934 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
935 struct ost_body *body;
938 __osc_update_grant(cli, oa->o_grant);
942 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
944 osc_update_grant(cli, body);
950 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
952 client_obd_list_lock(&cli->cl_loi_list_lock);
953 oa->o_grant = cli->cl_avail_grant / 4;
954 cli->cl_avail_grant -= oa->o_grant;
955 client_obd_list_unlock(&cli->cl_loi_list_lock);
956 oa->o_flags |= OBD_FL_SHRINK_GRANT;
957 osc_update_next_shrink(cli);
960 /* Shrink the current grant, either from some large amount to enough for a
961 * full set of in-flight RPCs, or if we have already shrunk to that limit
962 * then to enough for a single RPC. This avoids keeping more grant than
963 * needed, and avoids shrinking the grant piecemeal. */
964 static int osc_shrink_grant(struct client_obd *cli)
966 long target = (cli->cl_max_rpcs_in_flight + 1) *
967 cli->cl_max_pages_per_rpc;
969 client_obd_list_lock(&cli->cl_loi_list_lock);
970 if (cli->cl_avail_grant <= target)
971 target = cli->cl_max_pages_per_rpc;
972 client_obd_list_unlock(&cli->cl_loi_list_lock);
974 return osc_shrink_grant_to_target(cli, target);
977 int osc_shrink_grant_to_target(struct client_obd *cli, long target)
980 struct ost_body *body;
983 client_obd_list_lock(&cli->cl_loi_list_lock);
984 /* Don't shrink if we are already above or below the desired limit
985 * We don't want to shrink below a single RPC, as that will negatively
986 * impact block allocation and long-term performance. */
987 if (target < cli->cl_max_pages_per_rpc)
988 target = cli->cl_max_pages_per_rpc;
990 if (target >= cli->cl_avail_grant) {
991 client_obd_list_unlock(&cli->cl_loi_list_lock);
994 client_obd_list_unlock(&cli->cl_loi_list_lock);
1000 osc_announce_cached(cli, &body->oa, 0);
1002 client_obd_list_lock(&cli->cl_loi_list_lock);
1003 body->oa.o_grant = cli->cl_avail_grant - target;
1004 cli->cl_avail_grant = target;
1005 client_obd_list_unlock(&cli->cl_loi_list_lock);
1006 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
1007 osc_update_next_shrink(cli);
1009 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
1010 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
1011 sizeof(*body), body, NULL);
1013 __osc_update_grant(cli, body->oa.o_grant);
1018 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
1019 static int osc_should_shrink_grant(struct client_obd *client)
1021 cfs_time_t time = cfs_time_current();
1022 cfs_time_t next_shrink = client->cl_next_shrink_grant;
1023 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
1024 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
1025 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
1028 osc_update_next_shrink(client);
1033 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1035 struct client_obd *client;
1037 cfs_list_for_each_entry(client, &item->ti_obd_list,
1038 cl_grant_shrink_list) {
1039 if (osc_should_shrink_grant(client))
1040 osc_shrink_grant(client);
1045 static int osc_add_shrink_grant(struct client_obd *client)
1049 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1051 osc_grant_shrink_grant_cb, NULL,
1052 &client->cl_grant_shrink_list);
1054 CERROR("add grant client %s error %d\n",
1055 client->cl_import->imp_obd->obd_name, rc);
1058 CDEBUG(D_CACHE, "add grant client %s \n",
1059 client->cl_import->imp_obd->obd_name);
1060 osc_update_next_shrink(client);
1064 static int osc_del_shrink_grant(struct client_obd *client)
1066 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1070 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1073 * ocd_grant is the total grant amount we're expect to hold: if we've
1074 * been evicted, it's the new avail_grant amount, cl_dirty will drop
1075 * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
1077 * race is tolerable here: if we're evicted, but imp_state already
1078 * left EVICTED state, then cl_dirty must be 0 already.
1080 client_obd_list_lock(&cli->cl_loi_list_lock);
1081 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1082 cli->cl_avail_grant = ocd->ocd_grant;
1084 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
1085 client_obd_list_unlock(&cli->cl_loi_list_lock);
1087 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1088 cli->cl_avail_grant, cli->cl_lost_grant);
1089 LASSERT(cli->cl_avail_grant >= 0);
1091 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1092 cfs_list_empty(&cli->cl_grant_shrink_list))
1093 osc_add_shrink_grant(cli);
1096 /* We assume that the reason this OSC got a short read is because it read
1097 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1098 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1099 * this stripe never got written at or beyond this stripe offset yet. */
1100 static void handle_short_read(int nob_read, obd_count page_count,
1101 struct brw_page **pga)
1106 /* skip bytes read OK */
1107 while (nob_read > 0) {
1108 LASSERT (page_count > 0);
1110 if (pga[i]->count > nob_read) {
1111 /* EOF inside this page */
1112 ptr = cfs_kmap(pga[i]->pg) +
1113 (pga[i]->off & ~CFS_PAGE_MASK);
1114 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1115 cfs_kunmap(pga[i]->pg);
1121 nob_read -= pga[i]->count;
1126 /* zero remaining pages */
1127 while (page_count-- > 0) {
1128 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1129 memset(ptr, 0, pga[i]->count);
1130 cfs_kunmap(pga[i]->pg);
1135 static int check_write_rcs(struct ptlrpc_request *req,
1136 int requested_nob, int niocount,
1137 obd_count page_count, struct brw_page **pga)
1142 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1143 sizeof(*remote_rcs) *
1145 if (remote_rcs == NULL) {
1146 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1150 /* return error if any niobuf was in error */
1151 for (i = 0; i < niocount; i++) {
1152 if (remote_rcs[i] < 0)
1153 return(remote_rcs[i]);
1155 if (remote_rcs[i] != 0) {
1156 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1157 i, remote_rcs[i], req);
1162 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1163 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1164 req->rq_bulk->bd_nob_transferred, requested_nob);
1171 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1173 if (p1->flag != p2->flag) {
1174 unsigned mask = ~(OBD_BRW_FROM_GRANT|
1175 OBD_BRW_NOCACHE|OBD_BRW_SYNC);
1177 /* warn if we try to combine flags that we don't know to be
1178 * safe to combine */
1179 if ((p1->flag & mask) != (p2->flag & mask))
1180 CERROR("is it ok to have flags 0x%x and 0x%x in the "
1181 "same brw?\n", p1->flag, p2->flag);
1185 return (p1->off + p1->count == p2->off);
1188 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1189 struct brw_page **pga, int opc,
1190 cksum_type_t cksum_type)
1195 LASSERT (pg_count > 0);
1196 cksum = init_checksum(cksum_type);
1197 while (nob > 0 && pg_count > 0) {
1198 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1199 int off = pga[i]->off & ~CFS_PAGE_MASK;
1200 int count = pga[i]->count > nob ? nob : pga[i]->count;
1202 /* corrupt the data before we compute the checksum, to
1203 * simulate an OST->client data error */
1204 if (i == 0 && opc == OST_READ &&
1205 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1206 memcpy(ptr + off, "bad1", min(4, nob));
1207 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1208 cfs_kunmap(pga[i]->pg);
1209 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1212 nob -= pga[i]->count;
1216 /* For sending we only compute the wrong checksum instead
1217 * of corrupting the data so it is still correct on a redo */
1218 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1224 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1225 struct lov_stripe_md *lsm, obd_count page_count,
1226 struct brw_page **pga,
1227 struct ptlrpc_request **reqp,
1228 struct obd_capa *ocapa, int reserve)
1230 struct ptlrpc_request *req;
1231 struct ptlrpc_bulk_desc *desc;
1232 struct ost_body *body;
1233 struct obd_ioobj *ioobj;
1234 struct niobuf_remote *niobuf;
1235 int niocount, i, requested_nob, opc, rc;
1236 struct osc_brw_async_args *aa;
1237 struct req_capsule *pill;
1238 struct brw_page *pg_prev;
1241 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1242 RETURN(-ENOMEM); /* Recoverable */
1243 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1244 RETURN(-EINVAL); /* Fatal */
1246 if ((cmd & OBD_BRW_WRITE) != 0) {
1248 req = ptlrpc_request_alloc_pool(cli->cl_import,
1249 cli->cl_import->imp_rq_pool,
1250 &RQF_OST_BRW_WRITE);
1253 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1258 for (niocount = i = 1; i < page_count; i++) {
1259 if (!can_merge_pages(pga[i - 1], pga[i]))
1263 pill = &req->rq_pill;
1264 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1266 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1267 niocount * sizeof(*niobuf));
1268 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1270 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1272 ptlrpc_request_free(req);
1275 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1276 ptlrpc_at_set_req_timeout(req);
1278 if (opc == OST_WRITE)
1279 desc = ptlrpc_prep_bulk_imp(req, page_count,
1280 BULK_GET_SOURCE, OST_BULK_PORTAL);
1282 desc = ptlrpc_prep_bulk_imp(req, page_count,
1283 BULK_PUT_SINK, OST_BULK_PORTAL);
1286 GOTO(out, rc = -ENOMEM);
1287 /* NB request now owns desc and will free it when it gets freed */
1289 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1290 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1291 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1292 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1294 lustre_set_wire_obdo(&body->oa, oa);
1296 obdo_to_ioobj(oa, ioobj);
1297 ioobj->ioo_bufcnt = niocount;
1298 osc_pack_capa(req, body, ocapa);
1299 LASSERT (page_count > 0);
1301 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1302 struct brw_page *pg = pga[i];
1304 LASSERT(pg->count > 0);
1305 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1306 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1307 pg->off, pg->count);
1309 LASSERTF(i == 0 || pg->off > pg_prev->off,
1310 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1311 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1313 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1314 pg_prev->pg, page_private(pg_prev->pg),
1315 pg_prev->pg->index, pg_prev->off);
1317 LASSERTF(i == 0 || pg->off > pg_prev->off,
1318 "i %d p_c %u\n", i, page_count);
1320 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1321 (pg->flag & OBD_BRW_SRVLOCK));
1323 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1325 requested_nob += pg->count;
1327 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1329 niobuf->len += pg->count;
1331 niobuf->offset = pg->off;
1332 niobuf->len = pg->count;
1333 niobuf->flags = pg->flag;
1338 LASSERTF((void *)(niobuf - niocount) ==
1339 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1340 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1341 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1343 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1344 if (osc_should_shrink_grant(cli))
1345 osc_shrink_grant_local(cli, &body->oa);
1347 /* size[REQ_REC_OFF] still sizeof (*body) */
1348 if (opc == OST_WRITE) {
1349 if (unlikely(cli->cl_checksum) &&
1350 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1351 /* store cl_cksum_type in a local variable since
1352 * it can be changed via lprocfs */
1353 cksum_type_t cksum_type = cli->cl_cksum_type;
1355 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1356 oa->o_flags &= OBD_FL_LOCAL_MASK;
1357 body->oa.o_flags = 0;
1359 body->oa.o_flags |= cksum_type_pack(cksum_type);
1360 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1361 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1365 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1367 /* save this in 'oa', too, for later checking */
1368 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1369 oa->o_flags |= cksum_type_pack(cksum_type);
1371 /* clear out the checksum flag, in case this is a
1372 * resend but cl_checksum is no longer set. b=11238 */
1373 oa->o_valid &= ~OBD_MD_FLCKSUM;
1375 oa->o_cksum = body->oa.o_cksum;
1376 /* 1 RC per niobuf */
1377 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1378 sizeof(__u32) * niocount);
1380 if (unlikely(cli->cl_checksum) &&
1381 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1382 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1383 body->oa.o_flags = 0;
1384 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1385 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1388 ptlrpc_request_set_replen(req);
1390 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1391 aa = ptlrpc_req_async_args(req);
1393 aa->aa_requested_nob = requested_nob;
1394 aa->aa_nio_count = niocount;
1395 aa->aa_page_count = page_count;
1399 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1400 if (ocapa && reserve)
1401 aa->aa_ocapa = capa_get(ocapa);
1407 ptlrpc_req_finished(req);
1411 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1412 __u32 client_cksum, __u32 server_cksum, int nob,
1413 obd_count page_count, struct brw_page **pga,
1414 cksum_type_t client_cksum_type)
1418 cksum_type_t cksum_type;
1420 if (server_cksum == client_cksum) {
1421 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1425 if (oa->o_valid & OBD_MD_FLFLAGS)
1426 cksum_type = cksum_type_unpack(oa->o_flags);
1428 cksum_type = OBD_CKSUM_CRC32;
1430 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1433 if (cksum_type != client_cksum_type)
1434 msg = "the server did not use the checksum type specified in "
1435 "the original request - likely a protocol problem";
1436 else if (new_cksum == server_cksum)
1437 msg = "changed on the client after we checksummed it - "
1438 "likely false positive due to mmap IO (bug 11742)";
1439 else if (new_cksum == client_cksum)
1440 msg = "changed in transit before arrival at OST";
1442 msg = "changed in transit AND doesn't match the original - "
1443 "likely false positive due to mmap IO (bug 11742)";
1445 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1446 " object "LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
1447 msg, libcfs_nid2str(peer->nid),
1448 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1449 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1450 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1452 oa->o_valid & OBD_MD_FLGROUP ? oa->o_seq : (__u64)0,
1454 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1455 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1456 "client csum now %x\n", client_cksum, client_cksum_type,
1457 server_cksum, cksum_type, new_cksum);
1461 /* Note rc enters this function as number of bytes transferred */
1462 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1464 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1465 const lnet_process_id_t *peer =
1466 &req->rq_import->imp_connection->c_peer;
1467 struct client_obd *cli = aa->aa_cli;
1468 struct ost_body *body;
1469 __u32 client_cksum = 0;
1472 if (rc < 0 && rc != -EDQUOT) {
1473 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1477 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1478 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1480 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1484 #ifdef HAVE_QUOTA_SUPPORT
1485 /* set/clear over quota flag for a uid/gid */
1486 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1487 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1488 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1490 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid "LPX64", flags %x\n",
1491 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1493 lquota_setdq(quota_interface, cli, qid, body->oa.o_valid,
1501 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1502 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1504 osc_update_grant(cli, body);
1506 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1508 CERROR("Unexpected +ve rc %d\n", rc);
1511 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1513 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1516 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1517 check_write_checksum(&body->oa, peer, client_cksum,
1518 body->oa.o_cksum, aa->aa_requested_nob,
1519 aa->aa_page_count, aa->aa_ppga,
1520 cksum_type_unpack(aa->aa_oa->o_flags)))
1523 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1524 aa->aa_page_count, aa->aa_ppga);
1528 /* The rest of this function executes only for OST_READs */
1530 /* if unwrap_bulk failed, return -EAGAIN to retry */
1531 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1533 GOTO(out, rc = -EAGAIN);
1535 if (rc > aa->aa_requested_nob) {
1536 CERROR("Unexpected rc %d (%d requested)\n", rc,
1537 aa->aa_requested_nob);
1541 if (rc != req->rq_bulk->bd_nob_transferred) {
1542 CERROR ("Unexpected rc %d (%d transferred)\n",
1543 rc, req->rq_bulk->bd_nob_transferred);
1547 if (rc < aa->aa_requested_nob)
1548 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1550 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1551 static int cksum_counter;
1552 __u32 server_cksum = body->oa.o_cksum;
1555 cksum_type_t cksum_type;
1557 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1558 cksum_type = cksum_type_unpack(body->oa.o_flags);
1560 cksum_type = OBD_CKSUM_CRC32;
1561 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1562 aa->aa_ppga, OST_READ,
1565 if (peer->nid == req->rq_bulk->bd_sender) {
1569 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1572 if (server_cksum == ~0 && rc > 0) {
1573 CERROR("Protocol error: server %s set the 'checksum' "
1574 "bit, but didn't send a checksum. Not fatal, "
1575 "but please notify on http://bugzilla.lustre.org/\n",
1576 libcfs_nid2str(peer->nid));
1577 } else if (server_cksum != client_cksum) {
1578 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1579 "%s%s%s inode "DFID" object "
1580 LPU64"/"LPU64" extent "
1581 "["LPU64"-"LPU64"]\n",
1582 req->rq_import->imp_obd->obd_name,
1583 libcfs_nid2str(peer->nid),
1585 body->oa.o_valid & OBD_MD_FLFID ?
1586 body->oa.o_parent_seq : (__u64)0,
1587 body->oa.o_valid & OBD_MD_FLFID ?
1588 body->oa.o_parent_oid : 0,
1589 body->oa.o_valid & OBD_MD_FLFID ?
1590 body->oa.o_parent_ver : 0,
1592 body->oa.o_valid & OBD_MD_FLGROUP ?
1593 body->oa.o_seq : (__u64)0,
1594 aa->aa_ppga[0]->off,
1595 aa->aa_ppga[aa->aa_page_count-1]->off +
1596 aa->aa_ppga[aa->aa_page_count-1]->count -
1598 CERROR("client %x, server %x, cksum_type %x\n",
1599 client_cksum, server_cksum, cksum_type);
1601 aa->aa_oa->o_cksum = client_cksum;
1605 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1608 } else if (unlikely(client_cksum)) {
1609 static int cksum_missed;
1612 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1613 CERROR("Checksum %u requested from %s but not sent\n",
1614 cksum_missed, libcfs_nid2str(peer->nid));
1620 lustre_get_wire_obdo(aa->aa_oa, &body->oa);
1625 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1626 struct lov_stripe_md *lsm,
1627 obd_count page_count, struct brw_page **pga,
1628 struct obd_capa *ocapa)
1630 struct ptlrpc_request *req;
1634 struct l_wait_info lwi;
1638 cfs_waitq_init(&waitq);
1641 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1642 page_count, pga, &req, ocapa, 0);
1646 rc = ptlrpc_queue_wait(req);
1648 if (rc == -ETIMEDOUT && req->rq_resend) {
1649 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1650 ptlrpc_req_finished(req);
1654 rc = osc_brw_fini_request(req, rc);
1656 ptlrpc_req_finished(req);
1657 if (osc_recoverable_error(rc)) {
1659 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1660 CERROR("too many resend retries, returning error\n");
1664 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1665 l_wait_event(waitq, 0, &lwi);
1673 int osc_brw_redo_request(struct ptlrpc_request *request,
1674 struct osc_brw_async_args *aa)
1676 struct ptlrpc_request *new_req;
1677 struct ptlrpc_request_set *set = request->rq_set;
1678 struct osc_brw_async_args *new_aa;
1679 struct osc_async_page *oap;
1683 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1684 CERROR("too many resend retries, returning error\n");
1688 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1690 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1691 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1692 aa->aa_cli, aa->aa_oa,
1693 NULL /* lsm unused by osc currently */,
1694 aa->aa_page_count, aa->aa_ppga,
1695 &new_req, aa->aa_ocapa, 0);
1699 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1701 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1702 if (oap->oap_request != NULL) {
1703 LASSERTF(request == oap->oap_request,
1704 "request %p != oap_request %p\n",
1705 request, oap->oap_request);
1706 if (oap->oap_interrupted) {
1707 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1708 ptlrpc_req_finished(new_req);
1713 /* New request takes over pga and oaps from old request.
1714 * Note that copying a list_head doesn't work, need to move it... */
1716 new_req->rq_interpret_reply = request->rq_interpret_reply;
1717 new_req->rq_async_args = request->rq_async_args;
1718 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1720 new_aa = ptlrpc_req_async_args(new_req);
1722 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1723 cfs_list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1724 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1726 cfs_list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1727 if (oap->oap_request) {
1728 ptlrpc_req_finished(oap->oap_request);
1729 oap->oap_request = ptlrpc_request_addref(new_req);
1733 new_aa->aa_ocapa = aa->aa_ocapa;
1734 aa->aa_ocapa = NULL;
1736 /* use ptlrpc_set_add_req is safe because interpret functions work
1737 * in check_set context. only one way exist with access to request
1738 * from different thread got -EINTR - this way protected with
1739 * cl_loi_list_lock */
1740 ptlrpc_set_add_req(set, new_req);
1742 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1744 DEBUG_REQ(D_INFO, new_req, "new request");
1749 * ugh, we want disk allocation on the target to happen in offset order. we'll
1750 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1751 * fine for our small page arrays and doesn't require allocation. its an
1752 * insertion sort that swaps elements that are strides apart, shrinking the
1753 * stride down until its '1' and the array is sorted.
1755 static void sort_brw_pages(struct brw_page **array, int num)
1758 struct brw_page *tmp;
1762 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1767 for (i = stride ; i < num ; i++) {
1770 while (j >= stride && array[j - stride]->off > tmp->off) {
1771 array[j] = array[j - stride];
1776 } while (stride > 1);
1779 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1785 LASSERT (pages > 0);
1786 offset = pg[i]->off & ~CFS_PAGE_MASK;
1790 if (pages == 0) /* that's all */
1793 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1794 return count; /* doesn't end on page boundary */
1797 offset = pg[i]->off & ~CFS_PAGE_MASK;
1798 if (offset != 0) /* doesn't start on page boundary */
1805 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1807 struct brw_page **ppga;
1810 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1814 for (i = 0; i < count; i++)
1819 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1821 LASSERT(ppga != NULL);
1822 OBD_FREE(ppga, sizeof(*ppga) * count);
1825 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1826 obd_count page_count, struct brw_page *pga,
1827 struct obd_trans_info *oti)
1829 struct obdo *saved_oa = NULL;
1830 struct brw_page **ppga, **orig;
1831 struct obd_import *imp = class_exp2cliimp(exp);
1832 struct client_obd *cli;
1833 int rc, page_count_orig;
1836 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1837 cli = &imp->imp_obd->u.cli;
1839 if (cmd & OBD_BRW_CHECK) {
1840 /* The caller just wants to know if there's a chance that this
1841 * I/O can succeed */
1843 if (imp->imp_invalid)
1848 /* test_brw with a failed create can trip this, maybe others. */
1849 LASSERT(cli->cl_max_pages_per_rpc);
1853 orig = ppga = osc_build_ppga(pga, page_count);
1856 page_count_orig = page_count;
1858 sort_brw_pages(ppga, page_count);
1859 while (page_count) {
1860 obd_count pages_per_brw;
1862 if (page_count > cli->cl_max_pages_per_rpc)
1863 pages_per_brw = cli->cl_max_pages_per_rpc;
1865 pages_per_brw = page_count;
1867 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1869 if (saved_oa != NULL) {
1870 /* restore previously saved oa */
1871 *oinfo->oi_oa = *saved_oa;
1872 } else if (page_count > pages_per_brw) {
1873 /* save a copy of oa (brw will clobber it) */
1874 OBDO_ALLOC(saved_oa);
1875 if (saved_oa == NULL)
1876 GOTO(out, rc = -ENOMEM);
1877 *saved_oa = *oinfo->oi_oa;
1880 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1881 pages_per_brw, ppga, oinfo->oi_capa);
1886 page_count -= pages_per_brw;
1887 ppga += pages_per_brw;
1891 osc_release_ppga(orig, page_count_orig);
1893 if (saved_oa != NULL)
1894 OBDO_FREE(saved_oa);
1899 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1900 * the dirty accounting. Writeback completes or truncate happens before
1901 * writing starts. Must be called with the loi lock held. */
1902 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1905 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1909 /* This maintains the lists of pending pages to read/write for a given object
1910 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1911 * to quickly find objects that are ready to send an RPC. */
1912 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1918 if (lop->lop_num_pending == 0)
1921 /* if we have an invalid import we want to drain the queued pages
1922 * by forcing them through rpcs that immediately fail and complete
1923 * the pages. recovery relies on this to empty the queued pages
1924 * before canceling the locks and evicting down the llite pages */
1925 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1928 /* stream rpcs in queue order as long as as there is an urgent page
1929 * queued. this is our cheap solution for good batching in the case
1930 * where writepage marks some random page in the middle of the file
1931 * as urgent because of, say, memory pressure */
1932 if (!cfs_list_empty(&lop->lop_urgent)) {
1933 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1936 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1937 optimal = cli->cl_max_pages_per_rpc;
1938 if (cmd & OBD_BRW_WRITE) {
1939 /* trigger a write rpc stream as long as there are dirtiers
1940 * waiting for space. as they're waiting, they're not going to
1941 * create more pages to coallesce with what's waiting.. */
1942 if (!cfs_list_empty(&cli->cl_cache_waiters)) {
1943 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1946 /* +16 to avoid triggering rpcs that would want to include pages
1947 * that are being queued but which can't be made ready until
1948 * the queuer finishes with the page. this is a wart for
1949 * llite::commit_write() */
1952 if (lop->lop_num_pending >= optimal)
1958 static int lop_makes_hprpc(struct loi_oap_pages *lop)
1960 struct osc_async_page *oap;
1963 if (cfs_list_empty(&lop->lop_urgent))
1966 oap = cfs_list_entry(lop->lop_urgent.next,
1967 struct osc_async_page, oap_urgent_item);
1969 if (oap->oap_async_flags & ASYNC_HP) {
1970 CDEBUG(D_CACHE, "hp request forcing RPC\n");
1977 static void on_list(cfs_list_t *item, cfs_list_t *list,
1980 if (cfs_list_empty(item) && should_be_on)
1981 cfs_list_add_tail(item, list);
1982 else if (!cfs_list_empty(item) && !should_be_on)
1983 cfs_list_del_init(item);
1986 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1987 * can find pages to build into rpcs quickly */
1988 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1990 if (lop_makes_hprpc(&loi->loi_write_lop) ||
1991 lop_makes_hprpc(&loi->loi_read_lop)) {
1993 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
1994 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
1996 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
1997 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
1998 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
1999 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
2002 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
2003 loi->loi_write_lop.lop_num_pending);
2005 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
2006 loi->loi_read_lop.lop_num_pending);
2009 static void lop_update_pending(struct client_obd *cli,
2010 struct loi_oap_pages *lop, int cmd, int delta)
2012 lop->lop_num_pending += delta;
2013 if (cmd & OBD_BRW_WRITE)
2014 cli->cl_pending_w_pages += delta;
2016 cli->cl_pending_r_pages += delta;
2020 * this is called when a sync waiter receives an interruption. Its job is to
2021 * get the caller woken as soon as possible. If its page hasn't been put in an
2022 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
2023 * desiring interruption which will forcefully complete the rpc once the rpc
2026 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
2028 struct loi_oap_pages *lop;
2029 struct lov_oinfo *loi;
2033 LASSERT(!oap->oap_interrupted);
2034 oap->oap_interrupted = 1;
2036 /* ok, it's been put in an rpc. only one oap gets a request reference */
2037 if (oap->oap_request != NULL) {
2038 ptlrpc_mark_interrupted(oap->oap_request);
2039 ptlrpcd_wake(oap->oap_request);
2040 ptlrpc_req_finished(oap->oap_request);
2041 oap->oap_request = NULL;
2045 * page completion may be called only if ->cpo_prep() method was
2046 * executed by osc_io_submit(), that also adds page the to pending list
2048 if (!cfs_list_empty(&oap->oap_pending_item)) {
2049 cfs_list_del_init(&oap->oap_pending_item);
2050 cfs_list_del_init(&oap->oap_urgent_item);
2053 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2054 &loi->loi_write_lop : &loi->loi_read_lop;
2055 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2056 loi_list_maint(oap->oap_cli, oap->oap_loi);
2057 rc = oap->oap_caller_ops->ap_completion(env,
2058 oap->oap_caller_data,
2059 oap->oap_cmd, NULL, -EINTR);
2065 /* this is trying to propogate async writeback errors back up to the
2066 * application. As an async write fails we record the error code for later if
2067 * the app does an fsync. As long as errors persist we force future rpcs to be
2068 * sync so that the app can get a sync error and break the cycle of queueing
2069 * pages for which writeback will fail. */
2070 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2077 ar->ar_force_sync = 1;
2078 ar->ar_min_xid = ptlrpc_sample_next_xid();
2083 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2084 ar->ar_force_sync = 0;
2087 void osc_oap_to_pending(struct osc_async_page *oap)
2089 struct loi_oap_pages *lop;
2091 if (oap->oap_cmd & OBD_BRW_WRITE)
2092 lop = &oap->oap_loi->loi_write_lop;
2094 lop = &oap->oap_loi->loi_read_lop;
2096 if (oap->oap_async_flags & ASYNC_HP)
2097 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2098 else if (oap->oap_async_flags & ASYNC_URGENT)
2099 cfs_list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2100 cfs_list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2101 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2104 /* this must be called holding the loi list lock to give coverage to exit_cache,
2105 * async_flag maintenance, and oap_request */
2106 static void osc_ap_completion(const struct lu_env *env,
2107 struct client_obd *cli, struct obdo *oa,
2108 struct osc_async_page *oap, int sent, int rc)
2113 if (oap->oap_request != NULL) {
2114 xid = ptlrpc_req_xid(oap->oap_request);
2115 ptlrpc_req_finished(oap->oap_request);
2116 oap->oap_request = NULL;
2119 cfs_spin_lock(&oap->oap_lock);
2120 oap->oap_async_flags = 0;
2121 cfs_spin_unlock(&oap->oap_lock);
2122 oap->oap_interrupted = 0;
2124 if (oap->oap_cmd & OBD_BRW_WRITE) {
2125 osc_process_ar(&cli->cl_ar, xid, rc);
2126 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2129 if (rc == 0 && oa != NULL) {
2130 if (oa->o_valid & OBD_MD_FLBLOCKS)
2131 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2132 if (oa->o_valid & OBD_MD_FLMTIME)
2133 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2134 if (oa->o_valid & OBD_MD_FLATIME)
2135 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2136 if (oa->o_valid & OBD_MD_FLCTIME)
2137 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2140 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2141 oap->oap_cmd, oa, rc);
2143 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2144 * I/O on the page could start, but OSC calls it under lock
2145 * and thus we can add oap back to pending safely */
2147 /* upper layer wants to leave the page on pending queue */
2148 osc_oap_to_pending(oap);
2150 osc_exit_cache(cli, oap, sent);
2154 static int brw_interpret(const struct lu_env *env,
2155 struct ptlrpc_request *req, void *data, int rc)
2157 struct osc_brw_async_args *aa = data;
2158 struct client_obd *cli;
2162 rc = osc_brw_fini_request(req, rc);
2163 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2164 if (osc_recoverable_error(rc)) {
2165 rc = osc_brw_redo_request(req, aa);
2171 capa_put(aa->aa_ocapa);
2172 aa->aa_ocapa = NULL;
2177 client_obd_list_lock(&cli->cl_loi_list_lock);
2179 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2180 * is called so we know whether to go to sync BRWs or wait for more
2181 * RPCs to complete */
2182 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2183 cli->cl_w_in_flight--;
2185 cli->cl_r_in_flight--;
2187 async = cfs_list_empty(&aa->aa_oaps);
2188 if (!async) { /* from osc_send_oap_rpc() */
2189 struct osc_async_page *oap, *tmp;
2190 /* the caller may re-use the oap after the completion call so
2191 * we need to clean it up a little */
2192 cfs_list_for_each_entry_safe(oap, tmp, &aa->aa_oaps,
2194 cfs_list_del_init(&oap->oap_rpc_item);
2195 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2197 OBDO_FREE(aa->aa_oa);
2198 } else { /* from async_internal() */
2200 for (i = 0; i < aa->aa_page_count; i++)
2201 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2203 if (aa->aa_oa->o_flags & OBD_FL_TEMPORARY)
2204 OBDO_FREE(aa->aa_oa);
2206 osc_wake_cache_waiters(cli);
2207 osc_check_rpcs(env, cli);
2208 client_obd_list_unlock(&cli->cl_loi_list_lock);
2210 cl_req_completion(env, aa->aa_clerq, rc);
2211 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2215 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2216 struct client_obd *cli,
2217 cfs_list_t *rpc_list,
2218 int page_count, int cmd)
2220 struct ptlrpc_request *req;
2221 struct brw_page **pga = NULL;
2222 struct osc_brw_async_args *aa;
2223 struct obdo *oa = NULL;
2224 const struct obd_async_page_ops *ops = NULL;
2225 void *caller_data = NULL;
2226 struct osc_async_page *oap;
2227 struct osc_async_page *tmp;
2228 struct ost_body *body;
2229 struct cl_req *clerq = NULL;
2230 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2231 struct ldlm_lock *lock = NULL;
2232 struct cl_req_attr crattr;
2236 LASSERT(!cfs_list_empty(rpc_list));
2238 memset(&crattr, 0, sizeof crattr);
2239 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2241 GOTO(out, req = ERR_PTR(-ENOMEM));
2245 GOTO(out, req = ERR_PTR(-ENOMEM));
2248 cfs_list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2249 struct cl_page *page = osc_oap2cl_page(oap);
2251 ops = oap->oap_caller_ops;
2252 caller_data = oap->oap_caller_data;
2254 clerq = cl_req_alloc(env, page, crt,
2255 1 /* only 1-object rpcs for
2258 GOTO(out, req = (void *)clerq);
2259 lock = oap->oap_ldlm_lock;
2261 pga[i] = &oap->oap_brw_page;
2262 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2263 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2264 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2266 cl_req_page_add(env, clerq, page);
2269 /* always get the data for the obdo for the rpc */
2270 LASSERT(ops != NULL);
2272 crattr.cra_capa = NULL;
2273 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2275 oa->o_handle = lock->l_remote_handle;
2276 oa->o_valid |= OBD_MD_FLHANDLE;
2279 rc = cl_req_prep(env, clerq);
2281 CERROR("cl_req_prep failed: %d\n", rc);
2282 GOTO(out, req = ERR_PTR(rc));
2285 sort_brw_pages(pga, page_count);
2286 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2287 pga, &req, crattr.cra_capa, 1);
2289 CERROR("prep_req failed: %d\n", rc);
2290 GOTO(out, req = ERR_PTR(rc));
2293 /* Need to update the timestamps after the request is built in case
2294 * we race with setattr (locally or in queue at OST). If OST gets
2295 * later setattr before earlier BRW (as determined by the request xid),
2296 * the OST will not use BRW timestamps. Sadly, there is no obvious
2297 * way to do this in a single call. bug 10150 */
2298 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2299 cl_req_attr_set(env, clerq, &crattr,
2300 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2302 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2303 aa = ptlrpc_req_async_args(req);
2304 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2305 cfs_list_splice(rpc_list, &aa->aa_oaps);
2306 CFS_INIT_LIST_HEAD(rpc_list);
2307 aa->aa_clerq = clerq;
2309 capa_put(crattr.cra_capa);
2314 OBD_FREE(pga, sizeof(*pga) * page_count);
2315 /* this should happen rarely and is pretty bad, it makes the
2316 * pending list not follow the dirty order */
2317 client_obd_list_lock(&cli->cl_loi_list_lock);
2318 cfs_list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2319 cfs_list_del_init(&oap->oap_rpc_item);
2321 /* queued sync pages can be torn down while the pages
2322 * were between the pending list and the rpc */
2323 if (oap->oap_interrupted) {
2324 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2325 osc_ap_completion(env, cli, NULL, oap, 0,
2329 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2331 if (clerq && !IS_ERR(clerq))
2332 cl_req_completion(env, clerq, PTR_ERR(req));
2338 * prepare pages for ASYNC io and put pages in send queue.
2340 * \param cmd OBD_BRW_* macroses
2341 * \param lop pending pages
2343 * \return zero if pages successfully add to send queue.
2344 * \return not zere if error occurring.
2347 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2348 struct lov_oinfo *loi,
2349 int cmd, struct loi_oap_pages *lop)
2351 struct ptlrpc_request *req;
2352 obd_count page_count = 0;
2353 struct osc_async_page *oap = NULL, *tmp;
2354 struct osc_brw_async_args *aa;
2355 const struct obd_async_page_ops *ops;
2356 CFS_LIST_HEAD(rpc_list);
2357 CFS_LIST_HEAD(tmp_list);
2358 unsigned int ending_offset;
2359 unsigned starting_offset = 0;
2361 struct cl_object *clob = NULL;
2364 /* ASYNC_HP pages first. At present, when the lock the pages is
2365 * to be canceled, the pages covered by the lock will be sent out
2366 * with ASYNC_HP. We have to send out them as soon as possible. */
2367 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_urgent, oap_urgent_item) {
2368 if (oap->oap_async_flags & ASYNC_HP)
2369 cfs_list_move(&oap->oap_pending_item, &tmp_list);
2371 cfs_list_move_tail(&oap->oap_pending_item, &tmp_list);
2372 if (++page_count >= cli->cl_max_pages_per_rpc)
2376 cfs_list_splice(&tmp_list, &lop->lop_pending);
2379 /* first we find the pages we're allowed to work with */
2380 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2382 ops = oap->oap_caller_ops;
2384 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2385 "magic 0x%x\n", oap, oap->oap_magic);
2388 /* pin object in memory, so that completion call-backs
2389 * can be safely called under client_obd_list lock. */
2390 clob = osc_oap2cl_page(oap)->cp_obj;
2391 cl_object_get(clob);
2394 if (page_count != 0 &&
2395 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2396 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2397 " oap %p, page %p, srvlock %u\n",
2398 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2402 /* If there is a gap at the start of this page, it can't merge
2403 * with any previous page, so we'll hand the network a
2404 * "fragmented" page array that it can't transfer in 1 RDMA */
2405 if (page_count != 0 && oap->oap_page_off != 0)
2408 /* in llite being 'ready' equates to the page being locked
2409 * until completion unlocks it. commit_write submits a page
2410 * as not ready because its unlock will happen unconditionally
2411 * as the call returns. if we race with commit_write giving
2412 * us that page we dont' want to create a hole in the page
2413 * stream, so we stop and leave the rpc to be fired by
2414 * another dirtier or kupdated interval (the not ready page
2415 * will still be on the dirty list). we could call in
2416 * at the end of ll_file_write to process the queue again. */
2417 if (!(oap->oap_async_flags & ASYNC_READY)) {
2418 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2421 CDEBUG(D_INODE, "oap %p page %p returned %d "
2422 "instead of ready\n", oap,
2426 /* llite is telling us that the page is still
2427 * in commit_write and that we should try
2428 * and put it in an rpc again later. we
2429 * break out of the loop so we don't create
2430 * a hole in the sequence of pages in the rpc
2435 /* the io isn't needed.. tell the checks
2436 * below to complete the rpc with EINTR */
2437 cfs_spin_lock(&oap->oap_lock);
2438 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2439 cfs_spin_unlock(&oap->oap_lock);
2440 oap->oap_count = -EINTR;
2443 cfs_spin_lock(&oap->oap_lock);
2444 oap->oap_async_flags |= ASYNC_READY;
2445 cfs_spin_unlock(&oap->oap_lock);
2448 LASSERTF(0, "oap %p page %p returned %d "
2449 "from make_ready\n", oap,
2457 * Page submitted for IO has to be locked. Either by
2458 * ->ap_make_ready() or by higher layers.
2460 #if defined(__KERNEL__) && defined(__linux__)
2462 struct cl_page *page;
2464 page = osc_oap2cl_page(oap);
2466 if (page->cp_type == CPT_CACHEABLE &&
2467 !(PageLocked(oap->oap_page) &&
2468 (CheckWriteback(oap->oap_page, cmd)))) {
2469 CDEBUG(D_PAGE, "page %p lost wb %lx/%x\n",
2471 (long)oap->oap_page->flags,
2472 oap->oap_async_flags);
2478 /* take the page out of our book-keeping */
2479 cfs_list_del_init(&oap->oap_pending_item);
2480 lop_update_pending(cli, lop, cmd, -1);
2481 cfs_list_del_init(&oap->oap_urgent_item);
2483 if (page_count == 0)
2484 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2485 (PTLRPC_MAX_BRW_SIZE - 1);
2487 /* ask the caller for the size of the io as the rpc leaves. */
2488 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2490 ops->ap_refresh_count(env, oap->oap_caller_data,
2492 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2494 if (oap->oap_count <= 0) {
2495 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2497 osc_ap_completion(env, cli, NULL,
2498 oap, 0, oap->oap_count);
2502 /* now put the page back in our accounting */
2503 cfs_list_add_tail(&oap->oap_rpc_item, &rpc_list);
2504 if (page_count == 0)
2505 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2506 if (++page_count >= cli->cl_max_pages_per_rpc)
2509 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2510 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2511 * have the same alignment as the initial writes that allocated
2512 * extents on the server. */
2513 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2514 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2515 if (ending_offset == 0)
2518 /* If there is a gap at the end of this page, it can't merge
2519 * with any subsequent pages, so we'll hand the network a
2520 * "fragmented" page array that it can't transfer in 1 RDMA */
2521 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2525 osc_wake_cache_waiters(cli);
2527 loi_list_maint(cli, loi);
2529 client_obd_list_unlock(&cli->cl_loi_list_lock);
2532 cl_object_put(env, clob);
2534 if (page_count == 0) {
2535 client_obd_list_lock(&cli->cl_loi_list_lock);
2539 req = osc_build_req(env, cli, &rpc_list, page_count, cmd);
2541 LASSERT(cfs_list_empty(&rpc_list));
2542 loi_list_maint(cli, loi);
2543 RETURN(PTR_ERR(req));
2546 aa = ptlrpc_req_async_args(req);
2548 if (cmd == OBD_BRW_READ) {
2549 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2550 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2551 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2552 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2554 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2555 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2556 cli->cl_w_in_flight);
2557 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2558 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2560 ptlrpc_lprocfs_brw(req, aa->aa_requested_nob);
2562 client_obd_list_lock(&cli->cl_loi_list_lock);
2564 if (cmd == OBD_BRW_READ)
2565 cli->cl_r_in_flight++;
2567 cli->cl_w_in_flight++;
2569 /* queued sync pages can be torn down while the pages
2570 * were between the pending list and the rpc */
2572 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2573 /* only one oap gets a request reference */
2576 if (oap->oap_interrupted && !req->rq_intr) {
2577 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2579 ptlrpc_mark_interrupted(req);
2583 tmp->oap_request = ptlrpc_request_addref(req);
2585 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2586 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2588 req->rq_interpret_reply = brw_interpret;
2589 ptlrpcd_add_req(req, PSCOPE_BRW);
2593 #define LOI_DEBUG(LOI, STR, args...) \
2594 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2595 !cfs_list_empty(&(LOI)->loi_ready_item) || \
2596 !cfs_list_empty(&(LOI)->loi_hp_ready_item), \
2597 (LOI)->loi_write_lop.lop_num_pending, \
2598 !cfs_list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2599 (LOI)->loi_read_lop.lop_num_pending, \
2600 !cfs_list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2603 /* This is called by osc_check_rpcs() to find which objects have pages that
2604 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2605 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2609 /* First return objects that have blocked locks so that they
2610 * will be flushed quickly and other clients can get the lock,
2611 * then objects which have pages ready to be stuffed into RPCs */
2612 if (!cfs_list_empty(&cli->cl_loi_hp_ready_list))
2613 RETURN(cfs_list_entry(cli->cl_loi_hp_ready_list.next,
2614 struct lov_oinfo, loi_hp_ready_item));
2615 if (!cfs_list_empty(&cli->cl_loi_ready_list))
2616 RETURN(cfs_list_entry(cli->cl_loi_ready_list.next,
2617 struct lov_oinfo, loi_ready_item));
2619 /* then if we have cache waiters, return all objects with queued
2620 * writes. This is especially important when many small files
2621 * have filled up the cache and not been fired into rpcs because
2622 * they don't pass the nr_pending/object threshhold */
2623 if (!cfs_list_empty(&cli->cl_cache_waiters) &&
2624 !cfs_list_empty(&cli->cl_loi_write_list))
2625 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2626 struct lov_oinfo, loi_write_item));
2628 /* then return all queued objects when we have an invalid import
2629 * so that they get flushed */
2630 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2631 if (!cfs_list_empty(&cli->cl_loi_write_list))
2632 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2635 if (!cfs_list_empty(&cli->cl_loi_read_list))
2636 RETURN(cfs_list_entry(cli->cl_loi_read_list.next,
2637 struct lov_oinfo, loi_read_item));
2642 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2644 struct osc_async_page *oap;
2647 if (!cfs_list_empty(&loi->loi_write_lop.lop_urgent)) {
2648 oap = cfs_list_entry(loi->loi_write_lop.lop_urgent.next,
2649 struct osc_async_page, oap_urgent_item);
2650 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2653 if (!hprpc && !cfs_list_empty(&loi->loi_read_lop.lop_urgent)) {
2654 oap = cfs_list_entry(loi->loi_read_lop.lop_urgent.next,
2655 struct osc_async_page, oap_urgent_item);
2656 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2659 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2662 /* called with the loi list lock held */
2663 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2665 struct lov_oinfo *loi;
2666 int rc = 0, race_counter = 0;
2669 while ((loi = osc_next_loi(cli)) != NULL) {
2670 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2672 if (osc_max_rpc_in_flight(cli, loi))
2675 /* attempt some read/write balancing by alternating between
2676 * reads and writes in an object. The makes_rpc checks here
2677 * would be redundant if we were getting read/write work items
2678 * instead of objects. we don't want send_oap_rpc to drain a
2679 * partial read pending queue when we're given this object to
2680 * do io on writes while there are cache waiters */
2681 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2682 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2683 &loi->loi_write_lop);
2685 CERROR("Write request failed with %d\n", rc);
2687 /* osc_send_oap_rpc failed, mostly because of
2690 * It can't break here, because if:
2691 * - a page was submitted by osc_io_submit, so
2693 * - no request in flight
2694 * - no subsequent request
2695 * The system will be in live-lock state,
2696 * because there is no chance to call
2697 * osc_io_unplug() and osc_check_rpcs() any
2698 * more. pdflush can't help in this case,
2699 * because it might be blocked at grabbing
2700 * the page lock as we mentioned.
2702 * Anyway, continue to drain pages. */
2711 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2712 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2713 &loi->loi_read_lop);
2715 CERROR("Read request failed with %d\n", rc);
2723 /* attempt some inter-object balancing by issueing rpcs
2724 * for each object in turn */
2725 if (!cfs_list_empty(&loi->loi_hp_ready_item))
2726 cfs_list_del_init(&loi->loi_hp_ready_item);
2727 if (!cfs_list_empty(&loi->loi_ready_item))
2728 cfs_list_del_init(&loi->loi_ready_item);
2729 if (!cfs_list_empty(&loi->loi_write_item))
2730 cfs_list_del_init(&loi->loi_write_item);
2731 if (!cfs_list_empty(&loi->loi_read_item))
2732 cfs_list_del_init(&loi->loi_read_item);
2734 loi_list_maint(cli, loi);
2736 /* send_oap_rpc fails with 0 when make_ready tells it to
2737 * back off. llite's make_ready does this when it tries
2738 * to lock a page queued for write that is already locked.
2739 * we want to try sending rpcs from many objects, but we
2740 * don't want to spin failing with 0. */
2741 if (race_counter == 10)
2747 /* we're trying to queue a page in the osc so we're subject to the
2748 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2749 * If the osc's queued pages are already at that limit, then we want to sleep
2750 * until there is space in the osc's queue for us. We also may be waiting for
2751 * write credits from the OST if there are RPCs in flight that may return some
2752 * before we fall back to sync writes.
2754 * We need this know our allocation was granted in the presence of signals */
2755 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2759 client_obd_list_lock(&cli->cl_loi_list_lock);
2760 rc = cfs_list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2761 client_obd_list_unlock(&cli->cl_loi_list_lock);
2766 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2769 int osc_enter_cache_try(const struct lu_env *env,
2770 struct client_obd *cli, struct lov_oinfo *loi,
2771 struct osc_async_page *oap, int transient)
2775 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2777 osc_consume_write_grant(cli, &oap->oap_brw_page);
2779 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2780 cfs_atomic_inc(&obd_dirty_transit_pages);
2781 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2787 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2788 * grant or cache space. */
2789 static int osc_enter_cache(const struct lu_env *env,
2790 struct client_obd *cli, struct lov_oinfo *loi,
2791 struct osc_async_page *oap)
2793 struct osc_cache_waiter ocw;
2794 struct l_wait_info lwi = { 0 };
2798 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2799 "grant: %lu\n", cli->cl_dirty, cfs_atomic_read(&obd_dirty_pages),
2800 cli->cl_dirty_max, obd_max_dirty_pages,
2801 cli->cl_lost_grant, cli->cl_avail_grant);
2803 /* force the caller to try sync io. this can jump the list
2804 * of queued writes and create a discontiguous rpc stream */
2805 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2806 loi->loi_ar.ar_force_sync)
2809 /* Hopefully normal case - cache space and write credits available */
2810 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2811 cfs_atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2812 osc_enter_cache_try(env, cli, loi, oap, 0))
2815 /* It is safe to block as a cache waiter as long as there is grant
2816 * space available or the hope of additional grant being returned
2817 * when an in flight write completes. Using the write back cache
2818 * if possible is preferable to sending the data synchronously
2819 * because write pages can then be merged in to large requests.
2820 * The addition of this cache waiter will causing pending write
2821 * pages to be sent immediately. */
2822 if (cli->cl_w_in_flight || cli->cl_avail_grant >= CFS_PAGE_SIZE) {
2823 cfs_list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2824 cfs_waitq_init(&ocw.ocw_waitq);
2828 loi_list_maint(cli, loi);
2829 osc_check_rpcs(env, cli);
2830 client_obd_list_unlock(&cli->cl_loi_list_lock);
2832 CDEBUG(D_CACHE, "sleeping for cache space\n");
2833 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2835 client_obd_list_lock(&cli->cl_loi_list_lock);
2836 if (!cfs_list_empty(&ocw.ocw_entry)) {
2837 cfs_list_del(&ocw.ocw_entry);
2847 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2848 struct lov_oinfo *loi, cfs_page_t *page,
2849 obd_off offset, const struct obd_async_page_ops *ops,
2850 void *data, void **res, int nocache,
2851 struct lustre_handle *lockh)
2853 struct osc_async_page *oap;
2858 return cfs_size_round(sizeof(*oap));
2861 oap->oap_magic = OAP_MAGIC;
2862 oap->oap_cli = &exp->exp_obd->u.cli;
2865 oap->oap_caller_ops = ops;
2866 oap->oap_caller_data = data;
2868 oap->oap_page = page;
2869 oap->oap_obj_off = offset;
2870 if (!client_is_remote(exp) &&
2871 cfs_capable(CFS_CAP_SYS_RESOURCE))
2872 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2874 LASSERT(!(offset & ~CFS_PAGE_MASK));
2876 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2877 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2878 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2879 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2881 cfs_spin_lock_init(&oap->oap_lock);
2882 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2886 struct osc_async_page *oap_from_cookie(void *cookie)
2888 struct osc_async_page *oap = cookie;
2889 if (oap->oap_magic != OAP_MAGIC)
2890 return ERR_PTR(-EINVAL);
2894 int osc_queue_async_io(const struct lu_env *env,
2895 struct obd_export *exp, struct lov_stripe_md *lsm,
2896 struct lov_oinfo *loi, void *cookie,
2897 int cmd, obd_off off, int count,
2898 obd_flag brw_flags, enum async_flags async_flags)
2900 struct client_obd *cli = &exp->exp_obd->u.cli;
2901 struct osc_async_page *oap;
2905 oap = oap_from_cookie(cookie);
2907 RETURN(PTR_ERR(oap));
2909 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2912 if (!cfs_list_empty(&oap->oap_pending_item) ||
2913 !cfs_list_empty(&oap->oap_urgent_item) ||
2914 !cfs_list_empty(&oap->oap_rpc_item))
2917 /* check if the file's owner/group is over quota */
2918 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
2919 struct cl_object *obj;
2920 struct cl_attr attr; /* XXX put attr into thread info */
2921 unsigned int qid[MAXQUOTAS];
2923 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
2925 cl_object_attr_lock(obj);
2926 rc = cl_object_attr_get(env, obj, &attr);
2927 cl_object_attr_unlock(obj);
2929 qid[USRQUOTA] = attr.cat_uid;
2930 qid[GRPQUOTA] = attr.cat_gid;
2932 lquota_chkdq(quota_interface, cli, qid) == NO_QUOTA)
2939 loi = lsm->lsm_oinfo[0];
2941 client_obd_list_lock(&cli->cl_loi_list_lock);
2943 LASSERT(off + count <= CFS_PAGE_SIZE);
2945 oap->oap_page_off = off;
2946 oap->oap_count = count;
2947 oap->oap_brw_flags = brw_flags;
2948 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
2949 if (libcfs_memory_pressure_get())
2950 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2951 cfs_spin_lock(&oap->oap_lock);
2952 oap->oap_async_flags = async_flags;
2953 cfs_spin_unlock(&oap->oap_lock);
2955 if (cmd & OBD_BRW_WRITE) {
2956 rc = osc_enter_cache(env, cli, loi, oap);
2958 client_obd_list_unlock(&cli->cl_loi_list_lock);
2963 osc_oap_to_pending(oap);
2964 loi_list_maint(cli, loi);
2966 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2969 osc_check_rpcs(env, cli);
2970 client_obd_list_unlock(&cli->cl_loi_list_lock);
2975 /* aka (~was & now & flag), but this is more clear :) */
2976 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2978 int osc_set_async_flags_base(struct client_obd *cli,
2979 struct lov_oinfo *loi, struct osc_async_page *oap,
2980 obd_flag async_flags)
2982 struct loi_oap_pages *lop;
2986 LASSERT(!cfs_list_empty(&oap->oap_pending_item));
2988 if (oap->oap_cmd & OBD_BRW_WRITE) {
2989 lop = &loi->loi_write_lop;
2991 lop = &loi->loi_read_lop;
2994 if ((oap->oap_async_flags & async_flags) == async_flags)
2997 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2998 flags |= ASYNC_READY;
3000 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
3001 cfs_list_empty(&oap->oap_rpc_item)) {
3002 if (oap->oap_async_flags & ASYNC_HP)
3003 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
3005 cfs_list_add_tail(&oap->oap_urgent_item,
3007 flags |= ASYNC_URGENT;
3008 loi_list_maint(cli, loi);
3010 cfs_spin_lock(&oap->oap_lock);
3011 oap->oap_async_flags |= flags;
3012 cfs_spin_unlock(&oap->oap_lock);
3014 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
3015 oap->oap_async_flags);
3019 int osc_teardown_async_page(struct obd_export *exp,
3020 struct lov_stripe_md *lsm,
3021 struct lov_oinfo *loi, void *cookie)
3023 struct client_obd *cli = &exp->exp_obd->u.cli;
3024 struct loi_oap_pages *lop;
3025 struct osc_async_page *oap;
3029 oap = oap_from_cookie(cookie);
3031 RETURN(PTR_ERR(oap));
3034 loi = lsm->lsm_oinfo[0];
3036 if (oap->oap_cmd & OBD_BRW_WRITE) {
3037 lop = &loi->loi_write_lop;
3039 lop = &loi->loi_read_lop;
3042 client_obd_list_lock(&cli->cl_loi_list_lock);
3044 if (!cfs_list_empty(&oap->oap_rpc_item))
3045 GOTO(out, rc = -EBUSY);
3047 osc_exit_cache(cli, oap, 0);
3048 osc_wake_cache_waiters(cli);
3050 if (!cfs_list_empty(&oap->oap_urgent_item)) {
3051 cfs_list_del_init(&oap->oap_urgent_item);
3052 cfs_spin_lock(&oap->oap_lock);
3053 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3054 cfs_spin_unlock(&oap->oap_lock);
3056 if (!cfs_list_empty(&oap->oap_pending_item)) {
3057 cfs_list_del_init(&oap->oap_pending_item);
3058 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3060 loi_list_maint(cli, loi);
3061 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3063 client_obd_list_unlock(&cli->cl_loi_list_lock);
3067 static void osc_set_lock_data_with_check(struct ldlm_lock *lock,
3068 struct ldlm_enqueue_info *einfo,
3071 void *data = einfo->ei_cbdata;
3073 LASSERT(lock != NULL);
3074 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3075 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3076 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3077 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3079 lock_res_and_lock(lock);
3080 cfs_spin_lock(&osc_ast_guard);
3081 LASSERT(lock->l_ast_data == NULL || lock->l_ast_data == data);
3082 lock->l_ast_data = data;
3083 cfs_spin_unlock(&osc_ast_guard);
3084 unlock_res_and_lock(lock);
3087 static void osc_set_data_with_check(struct lustre_handle *lockh,
3088 struct ldlm_enqueue_info *einfo,
3091 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3094 osc_set_lock_data_with_check(lock, einfo, flags);
3095 LDLM_LOCK_PUT(lock);
3097 CERROR("lockh %p, data %p - client evicted?\n",
3098 lockh, einfo->ei_cbdata);
3101 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3102 ldlm_iterator_t replace, void *data)
3104 struct ldlm_res_id res_id;
3105 struct obd_device *obd = class_exp2obd(exp);
3107 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3108 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3112 /* find any ldlm lock of the inode in osc
3116 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3117 ldlm_iterator_t replace, void *data)
3119 struct ldlm_res_id res_id;
3120 struct obd_device *obd = class_exp2obd(exp);
3123 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3124 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3125 if (rc == LDLM_ITER_STOP)
3127 if (rc == LDLM_ITER_CONTINUE)
3132 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3133 obd_enqueue_update_f upcall, void *cookie,
3136 int intent = *flags & LDLM_FL_HAS_INTENT;
3140 /* The request was created before ldlm_cli_enqueue call. */
3141 if (rc == ELDLM_LOCK_ABORTED) {
3142 struct ldlm_reply *rep;
3143 rep = req_capsule_server_get(&req->rq_pill,
3146 LASSERT(rep != NULL);
3147 if (rep->lock_policy_res1)
3148 rc = rep->lock_policy_res1;
3152 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3153 *flags |= LDLM_FL_LVB_READY;
3154 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3155 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3158 /* Call the update callback. */
3159 rc = (*upcall)(cookie, rc);
3163 static int osc_enqueue_interpret(const struct lu_env *env,
3164 struct ptlrpc_request *req,
3165 struct osc_enqueue_args *aa, int rc)
3167 struct ldlm_lock *lock;
3168 struct lustre_handle handle;
3171 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3172 * might be freed anytime after lock upcall has been called. */
3173 lustre_handle_copy(&handle, aa->oa_lockh);
3174 mode = aa->oa_ei->ei_mode;
3176 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3178 lock = ldlm_handle2lock(&handle);
3180 /* Take an additional reference so that a blocking AST that
3181 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3182 * to arrive after an upcall has been executed by
3183 * osc_enqueue_fini(). */
3184 ldlm_lock_addref(&handle, mode);
3186 /* Complete obtaining the lock procedure. */
3187 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3188 mode, aa->oa_flags, aa->oa_lvb,
3189 sizeof(*aa->oa_lvb), &handle, rc);
3190 /* Complete osc stuff. */
3191 rc = osc_enqueue_fini(req, aa->oa_lvb,
3192 aa->oa_upcall, aa->oa_cookie, aa->oa_flags, rc);
3194 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3196 /* Release the lock for async request. */
3197 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3199 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3200 * not already released by
3201 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3203 ldlm_lock_decref(&handle, mode);
3205 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3206 aa->oa_lockh, req, aa);
3207 ldlm_lock_decref(&handle, mode);
3208 LDLM_LOCK_PUT(lock);
3212 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3213 struct lov_oinfo *loi, int flags,
3214 struct ost_lvb *lvb, __u32 mode, int rc)
3216 if (rc == ELDLM_OK) {
3217 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3220 LASSERT(lock != NULL);
3221 loi->loi_lvb = *lvb;
3222 tmp = loi->loi_lvb.lvb_size;
3223 /* Extend KMS up to the end of this lock and no further
3224 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3225 if (tmp > lock->l_policy_data.l_extent.end)
3226 tmp = lock->l_policy_data.l_extent.end + 1;
3227 if (tmp >= loi->loi_kms) {
3228 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3229 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3230 loi_kms_set(loi, tmp);
3232 LDLM_DEBUG(lock, "lock acquired, setting rss="
3233 LPU64"; leaving kms="LPU64", end="LPU64,
3234 loi->loi_lvb.lvb_size, loi->loi_kms,
3235 lock->l_policy_data.l_extent.end);
3237 ldlm_lock_allow_match(lock);
3238 LDLM_LOCK_PUT(lock);
3239 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3240 loi->loi_lvb = *lvb;
3241 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3242 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3246 EXPORT_SYMBOL(osc_update_enqueue);
3248 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3250 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3251 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3252 * other synchronous requests, however keeping some locks and trying to obtain
3253 * others may take a considerable amount of time in a case of ost failure; and
3254 * when other sync requests do not get released lock from a client, the client
3255 * is excluded from the cluster -- such scenarious make the life difficult, so
3256 * release locks just after they are obtained. */
3257 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3258 int *flags, ldlm_policy_data_t *policy,
3259 struct ost_lvb *lvb, int kms_valid,
3260 obd_enqueue_update_f upcall, void *cookie,
3261 struct ldlm_enqueue_info *einfo,
3262 struct lustre_handle *lockh,
3263 struct ptlrpc_request_set *rqset, int async)
3265 struct obd_device *obd = exp->exp_obd;
3266 struct ptlrpc_request *req = NULL;
3267 int intent = *flags & LDLM_FL_HAS_INTENT;
3272 /* Filesystem lock extents are extended to page boundaries so that
3273 * dealing with the page cache is a little smoother. */
3274 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3275 policy->l_extent.end |= ~CFS_PAGE_MASK;
3278 * kms is not valid when either object is completely fresh (so that no
3279 * locks are cached), or object was evicted. In the latter case cached
3280 * lock cannot be used, because it would prime inode state with
3281 * potentially stale LVB.
3286 /* Next, search for already existing extent locks that will cover us */
3287 /* If we're trying to read, we also search for an existing PW lock. The
3288 * VFS and page cache already protect us locally, so lots of readers/
3289 * writers can share a single PW lock.
3291 * There are problems with conversion deadlocks, so instead of
3292 * converting a read lock to a write lock, we'll just enqueue a new
3295 * At some point we should cancel the read lock instead of making them
3296 * send us a blocking callback, but there are problems with canceling
3297 * locks out from other users right now, too. */
3298 mode = einfo->ei_mode;
3299 if (einfo->ei_mode == LCK_PR)
3301 mode = ldlm_lock_match(obd->obd_namespace,
3302 *flags | LDLM_FL_LVB_READY, res_id,
3303 einfo->ei_type, policy, mode, lockh, 0);
3305 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3307 if (matched->l_ast_data == NULL ||
3308 matched->l_ast_data == einfo->ei_cbdata) {
3309 /* addref the lock only if not async requests and PW
3310 * lock is matched whereas we asked for PR. */
3311 if (!rqset && einfo->ei_mode != mode)
3312 ldlm_lock_addref(lockh, LCK_PR);
3313 osc_set_lock_data_with_check(matched, einfo, *flags);
3315 /* I would like to be able to ASSERT here that
3316 * rss <= kms, but I can't, for reasons which
3317 * are explained in lov_enqueue() */
3320 /* We already have a lock, and it's referenced */
3321 (*upcall)(cookie, ELDLM_OK);
3323 /* For async requests, decref the lock. */
3324 if (einfo->ei_mode != mode)
3325 ldlm_lock_decref(lockh, LCK_PW);
3327 ldlm_lock_decref(lockh, einfo->ei_mode);
3328 LDLM_LOCK_PUT(matched);
3331 ldlm_lock_decref(lockh, mode);
3332 LDLM_LOCK_PUT(matched);
3337 CFS_LIST_HEAD(cancels);
3338 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3339 &RQF_LDLM_ENQUEUE_LVB);
3343 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3347 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3349 ptlrpc_request_set_replen(req);
3352 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3353 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3355 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3356 sizeof(*lvb), lockh, async);
3359 struct osc_enqueue_args *aa;
3360 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3361 aa = ptlrpc_req_async_args(req);
3364 aa->oa_flags = flags;
3365 aa->oa_upcall = upcall;
3366 aa->oa_cookie = cookie;
3368 aa->oa_lockh = lockh;
3370 req->rq_interpret_reply =
3371 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3372 if (rqset == PTLRPCD_SET)
3373 ptlrpcd_add_req(req, PSCOPE_OTHER);
3375 ptlrpc_set_add_req(rqset, req);
3376 } else if (intent) {
3377 ptlrpc_req_finished(req);
3382 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, rc);
3384 ptlrpc_req_finished(req);
3389 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3390 struct ldlm_enqueue_info *einfo,
3391 struct ptlrpc_request_set *rqset)
3393 struct ldlm_res_id res_id;
3397 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3398 oinfo->oi_md->lsm_object_seq, &res_id);
3400 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3401 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3402 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3403 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3404 rqset, rqset != NULL);
3408 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3409 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3410 int *flags, void *data, struct lustre_handle *lockh,
3413 struct obd_device *obd = exp->exp_obd;
3414 int lflags = *flags;
3418 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3421 /* Filesystem lock extents are extended to page boundaries so that
3422 * dealing with the page cache is a little smoother */
3423 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3424 policy->l_extent.end |= ~CFS_PAGE_MASK;
3426 /* Next, search for already existing extent locks that will cover us */
3427 /* If we're trying to read, we also search for an existing PW lock. The
3428 * VFS and page cache already protect us locally, so lots of readers/
3429 * writers can share a single PW lock. */
3433 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3434 res_id, type, policy, rc, lockh, unref);
3437 osc_set_data_with_check(lockh, data, lflags);
3438 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3439 ldlm_lock_addref(lockh, LCK_PR);
3440 ldlm_lock_decref(lockh, LCK_PW);
3447 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3451 if (unlikely(mode == LCK_GROUP))
3452 ldlm_lock_decref_and_cancel(lockh, mode);
3454 ldlm_lock_decref(lockh, mode);
3459 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3460 __u32 mode, struct lustre_handle *lockh)
3463 RETURN(osc_cancel_base(lockh, mode));
3466 static int osc_cancel_unused(struct obd_export *exp,
3467 struct lov_stripe_md *lsm,
3468 ldlm_cancel_flags_t flags,
3471 struct obd_device *obd = class_exp2obd(exp);
3472 struct ldlm_res_id res_id, *resp = NULL;
3475 resp = osc_build_res_name(lsm->lsm_object_id,
3476 lsm->lsm_object_seq, &res_id);
3479 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3482 static int osc_statfs_interpret(const struct lu_env *env,
3483 struct ptlrpc_request *req,
3484 struct osc_async_args *aa, int rc)
3486 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3487 struct obd_statfs *msfs;
3492 /* The request has in fact never been sent
3493 * due to issues at a higher level (LOV).
3494 * Exit immediately since the caller is
3495 * aware of the problem and takes care
3496 * of the clean up */
3499 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3500 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3506 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3508 GOTO(out, rc = -EPROTO);
3511 /* Reinitialize the RDONLY and DEGRADED flags at the client
3512 * on each statfs, so they don't stay set permanently. */
3513 cfs_spin_lock(&cli->cl_oscc.oscc_lock);
3515 if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
3516 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3517 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
3518 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
3520 if (unlikely(msfs->os_state & OS_STATE_READONLY))
3521 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3522 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
3523 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
3525 /* Add a bit of hysteresis so this flag isn't continually flapping,
3526 * and ensure that new files don't get extremely fragmented due to
3527 * only a small amount of available space in the filesystem.
3528 * We want to set the NOSPC flag when there is less than ~0.1% free
3529 * and clear it when there is at least ~0.2% free space, so:
3530 * avail < ~0.1% max max = avail + used
3531 * 1025 * avail < avail + used used = blocks - free
3532 * 1024 * avail < used
3533 * 1024 * avail < blocks - free
3534 * avail < ((blocks - free) >> 10)
3536 * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
3537 * lose that amount of space so in those cases we report no space left
3538 * if their is less than 1 GB left. */
3539 used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
3540 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
3541 ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
3542 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
3543 else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3544 (msfs->os_ffree > 64) && (msfs->os_bavail > (used << 1))))
3545 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_NOSPC;
3547 cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
3549 *aa->aa_oi->oi_osfs = *msfs;
3551 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3555 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3556 __u64 max_age, struct ptlrpc_request_set *rqset)
3558 struct ptlrpc_request *req;
3559 struct osc_async_args *aa;
3563 /* We could possibly pass max_age in the request (as an absolute
3564 * timestamp or a "seconds.usec ago") so the target can avoid doing
3565 * extra calls into the filesystem if that isn't necessary (e.g.
3566 * during mount that would help a bit). Having relative timestamps
3567 * is not so great if request processing is slow, while absolute
3568 * timestamps are not ideal because they need time synchronization. */
3569 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3573 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3575 ptlrpc_request_free(req);
3578 ptlrpc_request_set_replen(req);
3579 req->rq_request_portal = OST_CREATE_PORTAL;
3580 ptlrpc_at_set_req_timeout(req);
3582 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3583 /* procfs requests not want stat in wait for avoid deadlock */
3584 req->rq_no_resend = 1;
3585 req->rq_no_delay = 1;
3588 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3589 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3590 aa = ptlrpc_req_async_args(req);
3593 ptlrpc_set_add_req(rqset, req);
3597 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3598 __u64 max_age, __u32 flags)
3600 struct obd_statfs *msfs;
3601 struct ptlrpc_request *req;
3602 struct obd_import *imp = NULL;
3606 /*Since the request might also come from lprocfs, so we need
3607 *sync this with client_disconnect_export Bug15684*/
3608 cfs_down_read(&obd->u.cli.cl_sem);
3609 if (obd->u.cli.cl_import)
3610 imp = class_import_get(obd->u.cli.cl_import);
3611 cfs_up_read(&obd->u.cli.cl_sem);
3615 /* We could possibly pass max_age in the request (as an absolute
3616 * timestamp or a "seconds.usec ago") so the target can avoid doing
3617 * extra calls into the filesystem if that isn't necessary (e.g.
3618 * during mount that would help a bit). Having relative timestamps
3619 * is not so great if request processing is slow, while absolute
3620 * timestamps are not ideal because they need time synchronization. */
3621 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3623 class_import_put(imp);
3628 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3630 ptlrpc_request_free(req);
3633 ptlrpc_request_set_replen(req);
3634 req->rq_request_portal = OST_CREATE_PORTAL;
3635 ptlrpc_at_set_req_timeout(req);
3637 if (flags & OBD_STATFS_NODELAY) {
3638 /* procfs requests not want stat in wait for avoid deadlock */
3639 req->rq_no_resend = 1;
3640 req->rq_no_delay = 1;
3643 rc = ptlrpc_queue_wait(req);
3647 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3649 GOTO(out, rc = -EPROTO);
3656 ptlrpc_req_finished(req);
3660 /* Retrieve object striping information.
3662 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3663 * the maximum number of OST indices which will fit in the user buffer.
3664 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3666 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3668 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3669 struct lov_user_md_v3 lum, *lumk;
3670 struct lov_user_ost_data_v1 *lmm_objects;
3671 int rc = 0, lum_size;
3677 /* we only need the header part from user space to get lmm_magic and
3678 * lmm_stripe_count, (the header part is common to v1 and v3) */
3679 lum_size = sizeof(struct lov_user_md_v1);
3680 if (cfs_copy_from_user(&lum, lump, lum_size))
3683 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3684 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3687 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3688 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3689 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3690 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3692 /* we can use lov_mds_md_size() to compute lum_size
3693 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3694 if (lum.lmm_stripe_count > 0) {
3695 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3696 OBD_ALLOC(lumk, lum_size);
3700 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3701 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3703 lmm_objects = &(lumk->lmm_objects[0]);
3704 lmm_objects->l_object_id = lsm->lsm_object_id;
3706 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3710 lumk->lmm_object_id = lsm->lsm_object_id;
3711 lumk->lmm_object_seq = lsm->lsm_object_seq;
3712 lumk->lmm_stripe_count = 1;
3714 if (cfs_copy_to_user(lump, lumk, lum_size))
3718 OBD_FREE(lumk, lum_size);
3724 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3725 void *karg, void *uarg)
3727 struct obd_device *obd = exp->exp_obd;
3728 struct obd_ioctl_data *data = karg;
3732 if (!cfs_try_module_get(THIS_MODULE)) {
3733 CERROR("Can't get module. Is it alive?");
3737 case OBD_IOC_LOV_GET_CONFIG: {
3739 struct lov_desc *desc;
3740 struct obd_uuid uuid;
3744 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3745 GOTO(out, err = -EINVAL);
3747 data = (struct obd_ioctl_data *)buf;
3749 if (sizeof(*desc) > data->ioc_inllen1) {
3750 obd_ioctl_freedata(buf, len);
3751 GOTO(out, err = -EINVAL);
3754 if (data->ioc_inllen2 < sizeof(uuid)) {
3755 obd_ioctl_freedata(buf, len);
3756 GOTO(out, err = -EINVAL);
3759 desc = (struct lov_desc *)data->ioc_inlbuf1;
3760 desc->ld_tgt_count = 1;
3761 desc->ld_active_tgt_count = 1;
3762 desc->ld_default_stripe_count = 1;
3763 desc->ld_default_stripe_size = 0;
3764 desc->ld_default_stripe_offset = 0;
3765 desc->ld_pattern = 0;
3766 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3768 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3770 err = cfs_copy_to_user((void *)uarg, buf, len);
3773 obd_ioctl_freedata(buf, len);
3776 case LL_IOC_LOV_SETSTRIPE:
3777 err = obd_alloc_memmd(exp, karg);
3781 case LL_IOC_LOV_GETSTRIPE:
3782 err = osc_getstripe(karg, uarg);
3784 case OBD_IOC_CLIENT_RECOVER:
3785 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3790 case IOC_OSC_SET_ACTIVE:
3791 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3794 case OBD_IOC_POLL_QUOTACHECK:
3795 err = lquota_poll_check(quota_interface, exp,
3796 (struct if_quotacheck *)karg);
3798 case OBD_IOC_PING_TARGET:
3799 err = ptlrpc_obd_ping(obd);
3802 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3803 cmd, cfs_curproc_comm());
3804 GOTO(out, err = -ENOTTY);
3807 cfs_module_put(THIS_MODULE);
3811 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3812 void *key, __u32 *vallen, void *val,
3813 struct lov_stripe_md *lsm)
3816 if (!vallen || !val)
3819 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3820 __u32 *stripe = val;
3821 *vallen = sizeof(*stripe);
3824 } else if (KEY_IS(KEY_LAST_ID)) {
3825 struct ptlrpc_request *req;
3830 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3831 &RQF_OST_GET_INFO_LAST_ID);
3835 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3836 RCL_CLIENT, keylen);
3837 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3839 ptlrpc_request_free(req);
3843 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3844 memcpy(tmp, key, keylen);
3846 req->rq_no_delay = req->rq_no_resend = 1;
3847 ptlrpc_request_set_replen(req);
3848 rc = ptlrpc_queue_wait(req);
3852 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3854 GOTO(out, rc = -EPROTO);
3856 *((obd_id *)val) = *reply;
3858 ptlrpc_req_finished(req);
3860 } else if (KEY_IS(KEY_FIEMAP)) {
3861 struct ptlrpc_request *req;
3862 struct ll_user_fiemap *reply;
3866 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3867 &RQF_OST_GET_INFO_FIEMAP);
3871 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3872 RCL_CLIENT, keylen);
3873 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3874 RCL_CLIENT, *vallen);
3875 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3876 RCL_SERVER, *vallen);
3878 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3880 ptlrpc_request_free(req);
3884 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3885 memcpy(tmp, key, keylen);
3886 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3887 memcpy(tmp, val, *vallen);
3889 ptlrpc_request_set_replen(req);
3890 rc = ptlrpc_queue_wait(req);
3894 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3896 GOTO(out1, rc = -EPROTO);
3898 memcpy(val, reply, *vallen);
3900 ptlrpc_req_finished(req);
3908 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
3910 struct llog_ctxt *ctxt;
3914 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3916 rc = llog_initiator_connect(ctxt);
3917 llog_ctxt_put(ctxt);
3919 /* XXX return an error? skip setting below flags? */
3922 cfs_spin_lock(&imp->imp_lock);
3923 imp->imp_server_timeout = 1;
3924 imp->imp_pingable = 1;
3925 cfs_spin_unlock(&imp->imp_lock);
3926 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3931 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
3932 struct ptlrpc_request *req,
3939 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
3942 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3943 void *key, obd_count vallen, void *val,
3944 struct ptlrpc_request_set *set)
3946 struct ptlrpc_request *req;
3947 struct obd_device *obd = exp->exp_obd;
3948 struct obd_import *imp = class_exp2cliimp(exp);
3953 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3955 if (KEY_IS(KEY_NEXT_ID)) {
3957 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3959 if (vallen != sizeof(obd_id))
3964 if (vallen != sizeof(obd_id))
3967 /* avoid race between allocate new object and set next id
3968 * from ll_sync thread */
3969 cfs_spin_lock(&oscc->oscc_lock);
3970 new_val = *((obd_id*)val) + 1;
3971 if (new_val > oscc->oscc_next_id)
3972 oscc->oscc_next_id = new_val;
3973 cfs_spin_unlock(&oscc->oscc_lock);
3974 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3975 exp->exp_obd->obd_name,
3976 obd->u.cli.cl_oscc.oscc_next_id);
3981 if (KEY_IS(KEY_CHECKSUM)) {
3982 if (vallen != sizeof(int))
3984 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3988 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3989 sptlrpc_conf_client_adapt(obd);
3993 if (KEY_IS(KEY_FLUSH_CTX)) {
3994 sptlrpc_import_flush_my_ctx(imp);
3998 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
4001 /* We pass all other commands directly to OST. Since nobody calls osc
4002 methods directly and everybody is supposed to go through LOV, we
4003 assume lov checked invalid values for us.
4004 The only recognised values so far are evict_by_nid and mds_conn.
4005 Even if something bad goes through, we'd get a -EINVAL from OST
4008 if (KEY_IS(KEY_GRANT_SHRINK))
4009 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
4011 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
4016 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
4017 RCL_CLIENT, keylen);
4018 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
4019 RCL_CLIENT, vallen);
4020 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
4022 ptlrpc_request_free(req);
4026 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
4027 memcpy(tmp, key, keylen);
4028 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
4029 memcpy(tmp, val, vallen);
4031 if (KEY_IS(KEY_MDS_CONN)) {
4032 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4034 oscc->oscc_oa.o_seq = (*(__u32 *)val);
4035 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
4036 LASSERT_SEQ_IS_MDT(oscc->oscc_oa.o_seq);
4037 req->rq_no_delay = req->rq_no_resend = 1;
4038 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
4039 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
4040 struct osc_grant_args *aa;
4043 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
4044 aa = ptlrpc_req_async_args(req);
4047 ptlrpc_req_finished(req);
4050 *oa = ((struct ost_body *)val)->oa;
4052 req->rq_interpret_reply = osc_shrink_grant_interpret;
4055 ptlrpc_request_set_replen(req);
4056 if (!KEY_IS(KEY_GRANT_SHRINK)) {
4057 LASSERT(set != NULL);
4058 ptlrpc_set_add_req(set, req);
4059 ptlrpc_check_set(NULL, set);
4061 ptlrpcd_add_req(req, PSCOPE_OTHER);
4067 static struct llog_operations osc_size_repl_logops = {
4068 lop_cancel: llog_obd_repl_cancel
4071 static struct llog_operations osc_mds_ost_orig_logops;
4073 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4074 struct obd_device *tgt, struct llog_catid *catid)
4079 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4080 &catid->lci_logid, &osc_mds_ost_orig_logops);
4082 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4086 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4087 NULL, &osc_size_repl_logops);
4089 struct llog_ctxt *ctxt =
4090 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4093 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4098 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4099 obd->obd_name, tgt->obd_name, catid, rc);
4100 CERROR("logid "LPX64":0x%x\n",
4101 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4106 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4107 struct obd_device *disk_obd, int *index)
4109 struct llog_catid catid;
4110 static char name[32] = CATLIST;
4114 LASSERT(olg == &obd->obd_olg);
4116 cfs_mutex_down(&olg->olg_cat_processing);
4117 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4119 CERROR("rc: %d\n", rc);
4123 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4124 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4125 catid.lci_logid.lgl_oseq, catid.lci_logid.lgl_ogen);
4127 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4129 CERROR("rc: %d\n", rc);
4133 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4135 CERROR("rc: %d\n", rc);
4140 cfs_mutex_up(&olg->olg_cat_processing);
4145 static int osc_llog_finish(struct obd_device *obd, int count)
4147 struct llog_ctxt *ctxt;
4148 int rc = 0, rc2 = 0;
4151 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4153 rc = llog_cleanup(ctxt);
4155 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4157 rc2 = llog_cleanup(ctxt);
4164 static int osc_reconnect(const struct lu_env *env,
4165 struct obd_export *exp, struct obd_device *obd,
4166 struct obd_uuid *cluuid,
4167 struct obd_connect_data *data,
4170 struct client_obd *cli = &obd->u.cli;
4172 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4175 client_obd_list_lock(&cli->cl_loi_list_lock);
4176 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
4177 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4178 lost_grant = cli->cl_lost_grant;
4179 cli->cl_lost_grant = 0;
4180 client_obd_list_unlock(&cli->cl_loi_list_lock);
4182 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4183 "cl_dirty: %ld cl_lost_grant: %ld\n", data->ocd_grant,
4184 cli->cl_avail_grant, cli->cl_dirty, lost_grant);
4185 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4186 " ocd_grant: %d\n", data->ocd_connect_flags,
4187 data->ocd_version, data->ocd_grant);
4193 static int osc_disconnect(struct obd_export *exp)
4195 struct obd_device *obd = class_exp2obd(exp);
4196 struct llog_ctxt *ctxt;
4199 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4201 if (obd->u.cli.cl_conn_count == 1) {
4202 /* Flush any remaining cancel messages out to the
4204 llog_sync(ctxt, exp);
4206 llog_ctxt_put(ctxt);
4208 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4212 rc = client_disconnect_export(exp);
4214 * Initially we put del_shrink_grant before disconnect_export, but it
4215 * causes the following problem if setup (connect) and cleanup
4216 * (disconnect) are tangled together.
4217 * connect p1 disconnect p2
4218 * ptlrpc_connect_import
4219 * ............... class_manual_cleanup
4222 * ptlrpc_connect_interrupt
4224 * add this client to shrink list
4226 * Bang! pinger trigger the shrink.
4227 * So the osc should be disconnected from the shrink list, after we
4228 * are sure the import has been destroyed. BUG18662
4230 if (obd->u.cli.cl_import == NULL)
4231 osc_del_shrink_grant(&obd->u.cli);
4235 static int osc_import_event(struct obd_device *obd,
4236 struct obd_import *imp,
4237 enum obd_import_event event)
4239 struct client_obd *cli;
4243 LASSERT(imp->imp_obd == obd);
4246 case IMP_EVENT_DISCON: {
4247 /* Only do this on the MDS OSC's */
4248 if (imp->imp_server_timeout) {
4249 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4251 cfs_spin_lock(&oscc->oscc_lock);
4252 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4253 cfs_spin_unlock(&oscc->oscc_lock);
4256 client_obd_list_lock(&cli->cl_loi_list_lock);
4257 cli->cl_avail_grant = 0;
4258 cli->cl_lost_grant = 0;
4259 client_obd_list_unlock(&cli->cl_loi_list_lock);
4262 case IMP_EVENT_INACTIVE: {
4263 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4266 case IMP_EVENT_INVALIDATE: {
4267 struct ldlm_namespace *ns = obd->obd_namespace;
4271 env = cl_env_get(&refcheck);
4275 client_obd_list_lock(&cli->cl_loi_list_lock);
4276 /* all pages go to failing rpcs due to the invalid
4278 osc_check_rpcs(env, cli);
4279 client_obd_list_unlock(&cli->cl_loi_list_lock);
4281 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4282 cl_env_put(env, &refcheck);
4287 case IMP_EVENT_ACTIVE: {
4288 /* Only do this on the MDS OSC's */
4289 if (imp->imp_server_timeout) {
4290 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4292 cfs_spin_lock(&oscc->oscc_lock);
4293 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
4294 cfs_spin_unlock(&oscc->oscc_lock);
4296 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4299 case IMP_EVENT_OCD: {
4300 struct obd_connect_data *ocd = &imp->imp_connect_data;
4302 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4303 osc_init_grant(&obd->u.cli, ocd);
4306 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4307 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4309 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4313 CERROR("Unknown import event %d\n", event);
4319 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4325 rc = ptlrpcd_addref();
4329 rc = client_obd_setup(obd, lcfg);
4333 struct lprocfs_static_vars lvars = { 0 };
4334 struct client_obd *cli = &obd->u.cli;
4336 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4337 lprocfs_osc_init_vars(&lvars);
4338 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4339 lproc_osc_attach_seqstat(obd);
4340 sptlrpc_lprocfs_cliobd_attach(obd);
4341 ptlrpc_lprocfs_register_obd(obd);
4345 /* We need to allocate a few requests more, because
4346 brw_interpret tries to create new requests before freeing
4347 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4348 reserved, but I afraid that might be too much wasted RAM
4349 in fact, so 2 is just my guess and still should work. */
4350 cli->cl_import->imp_rq_pool =
4351 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4353 ptlrpc_add_rqs_to_pool);
4355 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4356 cfs_sema_init(&cli->cl_grant_sem, 1);
4362 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4368 case OBD_CLEANUP_EARLY: {
4369 struct obd_import *imp;
4370 imp = obd->u.cli.cl_import;
4371 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4372 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4373 ptlrpc_deactivate_import(imp);
4374 cfs_spin_lock(&imp->imp_lock);
4375 imp->imp_pingable = 0;
4376 cfs_spin_unlock(&imp->imp_lock);
4379 case OBD_CLEANUP_EXPORTS: {
4380 /* If we set up but never connected, the
4381 client import will not have been cleaned. */
4382 if (obd->u.cli.cl_import) {
4383 struct obd_import *imp;
4384 cfs_down_write(&obd->u.cli.cl_sem);
4385 imp = obd->u.cli.cl_import;
4386 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4388 ptlrpc_invalidate_import(imp);
4389 if (imp->imp_rq_pool) {
4390 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4391 imp->imp_rq_pool = NULL;
4393 class_destroy_import(imp);
4394 cfs_up_write(&obd->u.cli.cl_sem);
4395 obd->u.cli.cl_import = NULL;
4397 rc = obd_llog_finish(obd, 0);
4399 CERROR("failed to cleanup llogging subsystems\n");
4406 int osc_cleanup(struct obd_device *obd)
4411 ptlrpc_lprocfs_unregister_obd(obd);
4412 lprocfs_obd_cleanup(obd);
4414 /* free memory of osc quota cache */
4415 lquota_cleanup(quota_interface, obd);
4417 rc = client_obd_cleanup(obd);
4423 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4425 struct lprocfs_static_vars lvars = { 0 };
4428 lprocfs_osc_init_vars(&lvars);
4430 switch (lcfg->lcfg_command) {
4432 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4442 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4444 return osc_process_config_base(obd, buf);
4447 struct obd_ops osc_obd_ops = {
4448 .o_owner = THIS_MODULE,
4449 .o_setup = osc_setup,
4450 .o_precleanup = osc_precleanup,
4451 .o_cleanup = osc_cleanup,
4452 .o_add_conn = client_import_add_conn,
4453 .o_del_conn = client_import_del_conn,
4454 .o_connect = client_connect_import,
4455 .o_reconnect = osc_reconnect,
4456 .o_disconnect = osc_disconnect,
4457 .o_statfs = osc_statfs,
4458 .o_statfs_async = osc_statfs_async,
4459 .o_packmd = osc_packmd,
4460 .o_unpackmd = osc_unpackmd,
4461 .o_precreate = osc_precreate,
4462 .o_create = osc_create,
4463 .o_create_async = osc_create_async,
4464 .o_destroy = osc_destroy,
4465 .o_getattr = osc_getattr,
4466 .o_getattr_async = osc_getattr_async,
4467 .o_setattr = osc_setattr,
4468 .o_setattr_async = osc_setattr_async,
4470 .o_punch = osc_punch,
4472 .o_enqueue = osc_enqueue,
4473 .o_change_cbdata = osc_change_cbdata,
4474 .o_find_cbdata = osc_find_cbdata,
4475 .o_cancel = osc_cancel,
4476 .o_cancel_unused = osc_cancel_unused,
4477 .o_iocontrol = osc_iocontrol,
4478 .o_get_info = osc_get_info,
4479 .o_set_info_async = osc_set_info_async,
4480 .o_import_event = osc_import_event,
4481 .o_llog_init = osc_llog_init,
4482 .o_llog_finish = osc_llog_finish,
4483 .o_process_config = osc_process_config,
4486 extern struct lu_kmem_descr osc_caches[];
4487 extern cfs_spinlock_t osc_ast_guard;
4488 extern cfs_lock_class_key_t osc_ast_guard_class;
4490 int __init osc_init(void)
4492 struct lprocfs_static_vars lvars = { 0 };
4496 /* print an address of _any_ initialized kernel symbol from this
4497 * module, to allow debugging with gdb that doesn't support data
4498 * symbols from modules.*/
4499 CDEBUG(D_CONSOLE, "Lustre OSC module (%p).\n", &osc_caches);
4501 rc = lu_kmem_init(osc_caches);
4503 lprocfs_osc_init_vars(&lvars);
4505 cfs_request_module("lquota");
4506 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4507 lquota_init(quota_interface);
4508 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4510 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4511 LUSTRE_OSC_NAME, &osc_device_type);
4513 if (quota_interface)
4514 PORTAL_SYMBOL_PUT(osc_quota_interface);
4515 lu_kmem_fini(osc_caches);
4519 cfs_spin_lock_init(&osc_ast_guard);
4520 cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4522 osc_mds_ost_orig_logops = llog_lvfs_ops;
4523 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4524 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4525 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4526 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4532 static void /*__exit*/ osc_exit(void)
4534 lu_device_type_fini(&osc_device_type);
4536 lquota_exit(quota_interface);
4537 if (quota_interface)
4538 PORTAL_SYMBOL_PUT(osc_quota_interface);
4540 class_unregister_type(LUSTRE_OSC_NAME);
4541 lu_kmem_fini(osc_caches);
4544 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4545 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4546 MODULE_LICENSE("GPL");
4548 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);