1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * Copyright (c) 2011 Whamcloud, Inc.
36 * This file is part of Lustre, http://www.lustre.org/
37 * Lustre is a trademark of Sun Microsystems, Inc.
41 # define EXPORT_SYMTAB
43 #define DEBUG_SUBSYSTEM S_OSC
45 #include <libcfs/libcfs.h>
48 # include <liblustre.h>
51 #include <lustre_dlm.h>
52 #include <lustre_net.h>
53 #include <lustre/lustre_user.h>
54 #include <obd_cksum.h>
62 #include <lustre_ha.h>
63 #include <lprocfs_status.h>
64 #include <lustre_log.h>
65 #include <lustre_debug.h>
66 #include <lustre_param.h>
67 #include "osc_internal.h"
69 static quota_interface_t *quota_interface = NULL;
70 extern quota_interface_t osc_quota_interface;
72 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
73 static int brw_interpret(const struct lu_env *env,
74 struct ptlrpc_request *req, void *data, int rc);
75 int osc_cleanup(struct obd_device *obd);
77 /* Pack OSC object metadata for disk storage (LE byte order). */
78 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
79 struct lov_stripe_md *lsm)
84 lmm_size = sizeof(**lmmp);
89 OBD_FREE(*lmmp, lmm_size);
95 OBD_ALLOC(*lmmp, lmm_size);
101 LASSERT(lsm->lsm_object_id);
102 LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
103 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
104 (*lmmp)->lmm_object_seq = cpu_to_le64(lsm->lsm_object_seq);
110 /* Unpack OSC object metadata from disk storage (LE byte order). */
111 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
112 struct lov_mds_md *lmm, int lmm_bytes)
115 struct obd_import *imp = class_exp2cliimp(exp);
119 if (lmm_bytes < sizeof (*lmm)) {
120 CERROR("lov_mds_md too small: %d, need %d\n",
121 lmm_bytes, (int)sizeof(*lmm));
124 /* XXX LOV_MAGIC etc check? */
126 if (lmm->lmm_object_id == 0) {
127 CERROR("lov_mds_md: zero lmm_object_id\n");
132 lsm_size = lov_stripe_md_size(1);
136 if (*lsmp != NULL && lmm == NULL) {
137 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
138 OBD_FREE(*lsmp, lsm_size);
144 OBD_ALLOC(*lsmp, lsm_size);
147 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
148 if ((*lsmp)->lsm_oinfo[0] == NULL) {
149 OBD_FREE(*lsmp, lsm_size);
152 loi_init((*lsmp)->lsm_oinfo[0]);
156 /* XXX zero *lsmp? */
157 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
158 (*lsmp)->lsm_object_seq = le64_to_cpu (lmm->lmm_object_seq);
159 LASSERT((*lsmp)->lsm_object_id);
160 LASSERT_SEQ_IS_MDT((*lsmp)->lsm_object_seq);
164 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
165 (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
167 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
172 static inline void osc_pack_capa(struct ptlrpc_request *req,
173 struct ost_body *body, void *capa)
175 struct obd_capa *oc = (struct obd_capa *)capa;
176 struct lustre_capa *c;
181 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
184 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
185 DEBUG_CAPA(D_SEC, c, "pack");
188 static inline void osc_pack_req_body(struct ptlrpc_request *req,
189 struct obd_info *oinfo)
191 struct ost_body *body;
193 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
196 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
197 osc_pack_capa(req, body, oinfo->oi_capa);
200 static inline void osc_set_capa_size(struct ptlrpc_request *req,
201 const struct req_msg_field *field,
205 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
207 /* it is already calculated as sizeof struct obd_capa */
211 static int osc_getattr_interpret(const struct lu_env *env,
212 struct ptlrpc_request *req,
213 struct osc_async_args *aa, int rc)
215 struct ost_body *body;
221 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
223 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
224 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
226 /* This should really be sent by the OST */
227 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
228 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
230 CDEBUG(D_INFO, "can't unpack ost_body\n");
232 aa->aa_oi->oi_oa->o_valid = 0;
235 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
239 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
240 struct ptlrpc_request_set *set)
242 struct ptlrpc_request *req;
243 struct osc_async_args *aa;
247 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
251 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
252 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
254 ptlrpc_request_free(req);
258 osc_pack_req_body(req, oinfo);
260 ptlrpc_request_set_replen(req);
261 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
263 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
264 aa = ptlrpc_req_async_args(req);
267 ptlrpc_set_add_req(set, req);
271 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
273 struct ptlrpc_request *req;
274 struct ost_body *body;
278 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
282 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
283 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
285 ptlrpc_request_free(req);
289 osc_pack_req_body(req, oinfo);
291 ptlrpc_request_set_replen(req);
293 rc = ptlrpc_queue_wait(req);
297 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
299 GOTO(out, rc = -EPROTO);
301 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
302 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
304 /* This should really be sent by the OST */
305 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
306 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
310 ptlrpc_req_finished(req);
314 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
315 struct obd_trans_info *oti)
317 struct ptlrpc_request *req;
318 struct ost_body *body;
322 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
324 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
328 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
329 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
331 ptlrpc_request_free(req);
335 osc_pack_req_body(req, oinfo);
337 ptlrpc_request_set_replen(req);
339 rc = ptlrpc_queue_wait(req);
343 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
345 GOTO(out, rc = -EPROTO);
347 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
351 ptlrpc_req_finished(req);
355 static int osc_setattr_interpret(const struct lu_env *env,
356 struct ptlrpc_request *req,
357 struct osc_setattr_args *sa, int rc)
359 struct ost_body *body;
365 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
367 GOTO(out, rc = -EPROTO);
369 lustre_get_wire_obdo(sa->sa_oa, &body->oa);
371 rc = sa->sa_upcall(sa->sa_cookie, rc);
375 int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
376 struct obd_trans_info *oti,
377 obd_enqueue_update_f upcall, void *cookie,
378 struct ptlrpc_request_set *rqset)
380 struct ptlrpc_request *req;
381 struct osc_setattr_args *sa;
385 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
389 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
390 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
392 ptlrpc_request_free(req);
396 if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
397 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
399 osc_pack_req_body(req, oinfo);
401 ptlrpc_request_set_replen(req);
403 /* do mds to ost setattr asynchronously */
405 /* Do not wait for response. */
406 ptlrpcd_add_req(req, PSCOPE_OTHER);
408 req->rq_interpret_reply =
409 (ptlrpc_interpterer_t)osc_setattr_interpret;
411 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
412 sa = ptlrpc_req_async_args(req);
413 sa->sa_oa = oinfo->oi_oa;
414 sa->sa_upcall = upcall;
415 sa->sa_cookie = cookie;
417 if (rqset == PTLRPCD_SET)
418 ptlrpcd_add_req(req, PSCOPE_OTHER);
420 ptlrpc_set_add_req(rqset, req);
426 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
427 struct obd_trans_info *oti,
428 struct ptlrpc_request_set *rqset)
430 return osc_setattr_async_base(exp, oinfo, oti,
431 oinfo->oi_cb_up, oinfo, rqset);
434 int osc_real_create(struct obd_export *exp, struct obdo *oa,
435 struct lov_stripe_md **ea, struct obd_trans_info *oti)
437 struct ptlrpc_request *req;
438 struct ost_body *body;
439 struct lov_stripe_md *lsm;
448 rc = obd_alloc_memmd(exp, &lsm);
453 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
455 GOTO(out, rc = -ENOMEM);
457 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
459 ptlrpc_request_free(req);
463 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
465 lustre_set_wire_obdo(&body->oa, oa);
467 ptlrpc_request_set_replen(req);
469 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
470 oa->o_flags == OBD_FL_DELORPHAN) {
472 "delorphan from OST integration");
473 /* Don't resend the delorphan req */
474 req->rq_no_resend = req->rq_no_delay = 1;
477 rc = ptlrpc_queue_wait(req);
481 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
483 GOTO(out_req, rc = -EPROTO);
485 lustre_get_wire_obdo(oa, &body->oa);
487 /* This should really be sent by the OST */
488 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
489 oa->o_valid |= OBD_MD_FLBLKSZ;
491 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
492 * have valid lsm_oinfo data structs, so don't go touching that.
493 * This needs to be fixed in a big way.
495 lsm->lsm_object_id = oa->o_id;
496 lsm->lsm_object_seq = oa->o_seq;
500 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
502 if (oa->o_valid & OBD_MD_FLCOOKIE) {
503 if (!oti->oti_logcookies)
504 oti_alloc_cookies(oti, 1);
505 *oti->oti_logcookies = oa->o_lcookie;
509 CDEBUG(D_HA, "transno: "LPD64"\n",
510 lustre_msg_get_transno(req->rq_repmsg));
512 ptlrpc_req_finished(req);
515 obd_free_memmd(exp, &lsm);
519 int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
520 obd_enqueue_update_f upcall, void *cookie,
521 struct ptlrpc_request_set *rqset)
523 struct ptlrpc_request *req;
524 struct osc_setattr_args *sa;
525 struct ost_body *body;
529 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
533 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
534 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
536 ptlrpc_request_free(req);
539 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
540 ptlrpc_at_set_req_timeout(req);
542 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
544 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
545 osc_pack_capa(req, body, oinfo->oi_capa);
547 ptlrpc_request_set_replen(req);
550 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
551 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
552 sa = ptlrpc_req_async_args(req);
553 sa->sa_oa = oinfo->oi_oa;
554 sa->sa_upcall = upcall;
555 sa->sa_cookie = cookie;
556 if (rqset == PTLRPCD_SET)
557 ptlrpcd_add_req(req, PSCOPE_OTHER);
559 ptlrpc_set_add_req(rqset, req);
564 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
565 struct obd_trans_info *oti,
566 struct ptlrpc_request_set *rqset)
568 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
569 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
570 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
571 return osc_punch_base(exp, oinfo,
572 oinfo->oi_cb_up, oinfo, rqset);
575 static int osc_sync_interpret(const struct lu_env *env,
576 struct ptlrpc_request *req,
579 struct osc_async_args *aa = arg;
580 struct ost_body *body;
586 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
588 CERROR ("can't unpack ost_body\n");
589 GOTO(out, rc = -EPROTO);
592 *aa->aa_oi->oi_oa = body->oa;
594 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
598 static int osc_sync(struct obd_export *exp, struct obd_info *oinfo,
599 obd_size start, obd_size end,
600 struct ptlrpc_request_set *set)
602 struct ptlrpc_request *req;
603 struct ost_body *body;
604 struct osc_async_args *aa;
609 CDEBUG(D_INFO, "oa NULL\n");
613 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
617 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
618 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
620 ptlrpc_request_free(req);
624 /* overload the size and blocks fields in the oa with start/end */
625 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
627 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
628 body->oa.o_size = start;
629 body->oa.o_blocks = end;
630 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
631 osc_pack_capa(req, body, oinfo->oi_capa);
633 ptlrpc_request_set_replen(req);
634 req->rq_interpret_reply = osc_sync_interpret;
636 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
637 aa = ptlrpc_req_async_args(req);
640 ptlrpc_set_add_req(set, req);
644 /* Find and cancel locally locks matched by @mode in the resource found by
645 * @objid. Found locks are added into @cancel list. Returns the amount of
646 * locks added to @cancels list. */
647 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
649 ldlm_mode_t mode, int lock_flags)
651 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
652 struct ldlm_res_id res_id;
653 struct ldlm_resource *res;
657 osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
658 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
662 LDLM_RESOURCE_ADDREF(res);
663 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
664 lock_flags, 0, NULL);
665 LDLM_RESOURCE_DELREF(res);
666 ldlm_resource_putref(res);
670 static int osc_destroy_interpret(const struct lu_env *env,
671 struct ptlrpc_request *req, void *data,
674 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
676 cfs_atomic_dec(&cli->cl_destroy_in_flight);
677 cfs_waitq_signal(&cli->cl_destroy_waitq);
681 static int osc_can_send_destroy(struct client_obd *cli)
683 if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
684 cli->cl_max_rpcs_in_flight) {
685 /* The destroy request can be sent */
688 if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
689 cli->cl_max_rpcs_in_flight) {
691 * The counter has been modified between the two atomic
694 cfs_waitq_signal(&cli->cl_destroy_waitq);
699 /* Destroy requests can be async always on the client, and we don't even really
700 * care about the return code since the client cannot do anything at all about
702 * When the MDS is unlinking a filename, it saves the file objects into a
703 * recovery llog, and these object records are cancelled when the OST reports
704 * they were destroyed and sync'd to disk (i.e. transaction committed).
705 * If the client dies, or the OST is down when the object should be destroyed,
706 * the records are not cancelled, and when the OST reconnects to the MDS next,
707 * it will retrieve the llog unlink logs and then sends the log cancellation
708 * cookies to the MDS after committing destroy transactions. */
709 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
710 struct lov_stripe_md *ea, struct obd_trans_info *oti,
711 struct obd_export *md_export, void *capa)
713 struct client_obd *cli = &exp->exp_obd->u.cli;
714 struct ptlrpc_request *req;
715 struct ost_body *body;
716 CFS_LIST_HEAD(cancels);
721 CDEBUG(D_INFO, "oa NULL\n");
725 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
726 LDLM_FL_DISCARD_DATA);
728 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
730 ldlm_lock_list_put(&cancels, l_bl_ast, count);
734 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
735 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
738 ptlrpc_request_free(req);
742 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
743 ptlrpc_at_set_req_timeout(req);
745 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
746 oa->o_lcookie = *oti->oti_logcookies;
747 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
749 lustre_set_wire_obdo(&body->oa, oa);
751 osc_pack_capa(req, body, (struct obd_capa *)capa);
752 ptlrpc_request_set_replen(req);
754 /* don't throttle destroy RPCs for the MDT */
755 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
756 req->rq_interpret_reply = osc_destroy_interpret;
757 if (!osc_can_send_destroy(cli)) {
758 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
762 * Wait until the number of on-going destroy RPCs drops
763 * under max_rpc_in_flight
765 l_wait_event_exclusive(cli->cl_destroy_waitq,
766 osc_can_send_destroy(cli), &lwi);
770 /* Do not wait for response */
771 ptlrpcd_add_req(req, PSCOPE_OTHER);
775 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
778 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
780 LASSERT(!(oa->o_valid & bits));
783 client_obd_list_lock(&cli->cl_loi_list_lock);
784 oa->o_dirty = cli->cl_dirty;
785 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
786 CERROR("dirty %lu - %lu > dirty_max %lu\n",
787 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
789 } else if (cfs_atomic_read(&obd_dirty_pages) -
790 cfs_atomic_read(&obd_dirty_transit_pages) >
791 obd_max_dirty_pages + 1){
792 /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
793 * not covered by a lock thus they may safely race and trip
794 * this CERROR() unless we add in a small fudge factor (+1). */
795 CERROR("dirty %d - %d > system dirty_max %d\n",
796 cfs_atomic_read(&obd_dirty_pages),
797 cfs_atomic_read(&obd_dirty_transit_pages),
798 obd_max_dirty_pages);
800 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
801 CERROR("dirty %lu - dirty_max %lu too big???\n",
802 cli->cl_dirty, cli->cl_dirty_max);
805 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
806 (cli->cl_max_rpcs_in_flight + 1);
807 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
809 oa->o_grant = cli->cl_avail_grant;
810 oa->o_dropped = cli->cl_lost_grant;
811 cli->cl_lost_grant = 0;
812 client_obd_list_unlock(&cli->cl_loi_list_lock);
813 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
814 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
818 static void osc_update_next_shrink(struct client_obd *cli)
820 cli->cl_next_shrink_grant =
821 cfs_time_shift(cli->cl_grant_shrink_interval);
822 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
823 cli->cl_next_shrink_grant);
826 /* caller must hold loi_list_lock */
827 static void osc_consume_write_grant(struct client_obd *cli,
828 struct brw_page *pga)
830 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
831 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
832 cfs_atomic_inc(&obd_dirty_pages);
833 cli->cl_dirty += CFS_PAGE_SIZE;
834 cli->cl_avail_grant -= CFS_PAGE_SIZE;
835 pga->flag |= OBD_BRW_FROM_GRANT;
836 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
837 CFS_PAGE_SIZE, pga, pga->pg);
838 LASSERT(cli->cl_avail_grant >= 0);
839 osc_update_next_shrink(cli);
842 /* the companion to osc_consume_write_grant, called when a brw has completed.
843 * must be called with the loi lock held. */
844 static void osc_release_write_grant(struct client_obd *cli,
845 struct brw_page *pga, int sent)
847 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
850 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
851 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
856 pga->flag &= ~OBD_BRW_FROM_GRANT;
857 cfs_atomic_dec(&obd_dirty_pages);
858 cli->cl_dirty -= CFS_PAGE_SIZE;
859 if (pga->flag & OBD_BRW_NOCACHE) {
860 pga->flag &= ~OBD_BRW_NOCACHE;
861 cfs_atomic_dec(&obd_dirty_transit_pages);
862 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
865 cli->cl_lost_grant += CFS_PAGE_SIZE;
866 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
867 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
868 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
869 /* For short writes we shouldn't count parts of pages that
870 * span a whole block on the OST side, or our accounting goes
871 * wrong. Should match the code in filter_grant_check. */
872 int offset = pga->off & ~CFS_PAGE_MASK;
873 int count = pga->count + (offset & (blocksize - 1));
874 int end = (offset + pga->count) & (blocksize - 1);
876 count += blocksize - end;
878 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
879 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
880 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
881 cli->cl_avail_grant, cli->cl_dirty);
887 static unsigned long rpcs_in_flight(struct client_obd *cli)
889 return cli->cl_r_in_flight + cli->cl_w_in_flight;
892 /* caller must hold loi_list_lock */
893 void osc_wake_cache_waiters(struct client_obd *cli)
896 struct osc_cache_waiter *ocw;
899 cfs_list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
900 /* if we can't dirty more, we must wait until some is written */
901 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
902 (cfs_atomic_read(&obd_dirty_pages) + 1 >
903 obd_max_dirty_pages)) {
904 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
905 "osc max %ld, sys max %d\n", cli->cl_dirty,
906 cli->cl_dirty_max, obd_max_dirty_pages);
910 /* if still dirty cache but no grant wait for pending RPCs that
911 * may yet return us some grant before doing sync writes */
912 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
913 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
914 cli->cl_w_in_flight);
918 ocw = cfs_list_entry(l, struct osc_cache_waiter, ocw_entry);
919 cfs_list_del_init(&ocw->ocw_entry);
920 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
921 /* no more RPCs in flight to return grant, do sync IO */
922 ocw->ocw_rc = -EDQUOT;
923 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
925 osc_consume_write_grant(cli,
926 &ocw->ocw_oap->oap_brw_page);
929 cfs_waitq_signal(&ocw->ocw_waitq);
935 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
937 client_obd_list_lock(&cli->cl_loi_list_lock);
938 cli->cl_avail_grant += grant;
939 client_obd_list_unlock(&cli->cl_loi_list_lock);
942 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
944 if (body->oa.o_valid & OBD_MD_FLGRANT) {
945 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
946 __osc_update_grant(cli, body->oa.o_grant);
950 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
951 void *key, obd_count vallen, void *val,
952 struct ptlrpc_request_set *set);
954 static int osc_shrink_grant_interpret(const struct lu_env *env,
955 struct ptlrpc_request *req,
958 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
959 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
960 struct ost_body *body;
963 __osc_update_grant(cli, oa->o_grant);
967 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
969 osc_update_grant(cli, body);
975 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
977 client_obd_list_lock(&cli->cl_loi_list_lock);
978 oa->o_grant = cli->cl_avail_grant / 4;
979 cli->cl_avail_grant -= oa->o_grant;
980 client_obd_list_unlock(&cli->cl_loi_list_lock);
981 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
982 oa->o_valid |= OBD_MD_FLFLAGS;
985 oa->o_flags |= OBD_FL_SHRINK_GRANT;
986 osc_update_next_shrink(cli);
989 /* Shrink the current grant, either from some large amount to enough for a
990 * full set of in-flight RPCs, or if we have already shrunk to that limit
991 * then to enough for a single RPC. This avoids keeping more grant than
992 * needed, and avoids shrinking the grant piecemeal. */
993 static int osc_shrink_grant(struct client_obd *cli)
995 long target = (cli->cl_max_rpcs_in_flight + 1) *
996 cli->cl_max_pages_per_rpc;
998 client_obd_list_lock(&cli->cl_loi_list_lock);
999 if (cli->cl_avail_grant <= target)
1000 target = cli->cl_max_pages_per_rpc;
1001 client_obd_list_unlock(&cli->cl_loi_list_lock);
1003 return osc_shrink_grant_to_target(cli, target);
1006 int osc_shrink_grant_to_target(struct client_obd *cli, long target)
1009 struct ost_body *body;
1012 client_obd_list_lock(&cli->cl_loi_list_lock);
1013 /* Don't shrink if we are already above or below the desired limit
1014 * We don't want to shrink below a single RPC, as that will negatively
1015 * impact block allocation and long-term performance. */
1016 if (target < cli->cl_max_pages_per_rpc)
1017 target = cli->cl_max_pages_per_rpc;
1019 if (target >= cli->cl_avail_grant) {
1020 client_obd_list_unlock(&cli->cl_loi_list_lock);
1023 client_obd_list_unlock(&cli->cl_loi_list_lock);
1025 OBD_ALLOC_PTR(body);
1029 osc_announce_cached(cli, &body->oa, 0);
1031 client_obd_list_lock(&cli->cl_loi_list_lock);
1032 body->oa.o_grant = cli->cl_avail_grant - target;
1033 cli->cl_avail_grant = target;
1034 client_obd_list_unlock(&cli->cl_loi_list_lock);
1035 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
1036 body->oa.o_valid |= OBD_MD_FLFLAGS;
1037 body->oa.o_flags = 0;
1039 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
1040 osc_update_next_shrink(cli);
1042 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
1043 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
1044 sizeof(*body), body, NULL);
1046 __osc_update_grant(cli, body->oa.o_grant);
1051 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
1052 static int osc_should_shrink_grant(struct client_obd *client)
1054 cfs_time_t time = cfs_time_current();
1055 cfs_time_t next_shrink = client->cl_next_shrink_grant;
1057 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
1058 OBD_CONNECT_GRANT_SHRINK) == 0)
1061 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
1062 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
1063 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
1066 osc_update_next_shrink(client);
1071 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1073 struct client_obd *client;
1075 cfs_list_for_each_entry(client, &item->ti_obd_list,
1076 cl_grant_shrink_list) {
1077 if (osc_should_shrink_grant(client))
1078 osc_shrink_grant(client);
1083 static int osc_add_shrink_grant(struct client_obd *client)
1087 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1089 osc_grant_shrink_grant_cb, NULL,
1090 &client->cl_grant_shrink_list);
1092 CERROR("add grant client %s error %d\n",
1093 client->cl_import->imp_obd->obd_name, rc);
1096 CDEBUG(D_CACHE, "add grant client %s \n",
1097 client->cl_import->imp_obd->obd_name);
1098 osc_update_next_shrink(client);
1102 static int osc_del_shrink_grant(struct client_obd *client)
1104 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1108 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1111 * ocd_grant is the total grant amount we're expect to hold: if we've
1112 * been evicted, it's the new avail_grant amount, cl_dirty will drop
1113 * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
1115 * race is tolerable here: if we're evicted, but imp_state already
1116 * left EVICTED state, then cl_dirty must be 0 already.
1118 client_obd_list_lock(&cli->cl_loi_list_lock);
1119 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1120 cli->cl_avail_grant = ocd->ocd_grant;
1122 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
1124 if (cli->cl_avail_grant < 0) {
1125 CWARN("%s: available grant < 0, the OSS is probably not running"
1126 " with patch from bug20278 (%ld) \n",
1127 cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant);
1128 /* workaround for 1.6 servers which do not have
1129 * the patch from bug20278 */
1130 cli->cl_avail_grant = ocd->ocd_grant;
1133 client_obd_list_unlock(&cli->cl_loi_list_lock);
1135 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1136 cli->cl_import->imp_obd->obd_name,
1137 cli->cl_avail_grant, cli->cl_lost_grant);
1139 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1140 cfs_list_empty(&cli->cl_grant_shrink_list))
1141 osc_add_shrink_grant(cli);
1144 /* We assume that the reason this OSC got a short read is because it read
1145 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1146 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1147 * this stripe never got written at or beyond this stripe offset yet. */
1148 static void handle_short_read(int nob_read, obd_count page_count,
1149 struct brw_page **pga)
1154 /* skip bytes read OK */
1155 while (nob_read > 0) {
1156 LASSERT (page_count > 0);
1158 if (pga[i]->count > nob_read) {
1159 /* EOF inside this page */
1160 ptr = cfs_kmap(pga[i]->pg) +
1161 (pga[i]->off & ~CFS_PAGE_MASK);
1162 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1163 cfs_kunmap(pga[i]->pg);
1169 nob_read -= pga[i]->count;
1174 /* zero remaining pages */
1175 while (page_count-- > 0) {
1176 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1177 memset(ptr, 0, pga[i]->count);
1178 cfs_kunmap(pga[i]->pg);
1183 static int check_write_rcs(struct ptlrpc_request *req,
1184 int requested_nob, int niocount,
1185 obd_count page_count, struct brw_page **pga)
1190 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1191 sizeof(*remote_rcs) *
1193 if (remote_rcs == NULL) {
1194 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1198 /* return error if any niobuf was in error */
1199 for (i = 0; i < niocount; i++) {
1200 if ((int)remote_rcs[i] < 0)
1201 return(remote_rcs[i]);
1203 if (remote_rcs[i] != 0) {
1204 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1205 i, remote_rcs[i], req);
1210 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1211 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1212 req->rq_bulk->bd_nob_transferred, requested_nob);
1219 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1221 if (p1->flag != p2->flag) {
1222 unsigned mask = ~(OBD_BRW_FROM_GRANT|
1223 OBD_BRW_NOCACHE|OBD_BRW_SYNC|OBD_BRW_ASYNC);
1225 /* warn if we try to combine flags that we don't know to be
1226 * safe to combine */
1227 if ((p1->flag & mask) != (p2->flag & mask))
1228 CERROR("is it ok to have flags 0x%x and 0x%x in the "
1229 "same brw?\n", p1->flag, p2->flag);
1233 return (p1->off + p1->count == p2->off);
1236 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1237 struct brw_page **pga, int opc,
1238 cksum_type_t cksum_type)
1243 LASSERT (pg_count > 0);
1244 cksum = init_checksum(cksum_type);
1245 while (nob > 0 && pg_count > 0) {
1246 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1247 int off = pga[i]->off & ~CFS_PAGE_MASK;
1248 int count = pga[i]->count > nob ? nob : pga[i]->count;
1250 /* corrupt the data before we compute the checksum, to
1251 * simulate an OST->client data error */
1252 if (i == 0 && opc == OST_READ &&
1253 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1254 memcpy(ptr + off, "bad1", min(4, nob));
1255 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1256 cfs_kunmap(pga[i]->pg);
1257 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1260 nob -= pga[i]->count;
1264 /* For sending we only compute the wrong checksum instead
1265 * of corrupting the data so it is still correct on a redo */
1266 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1272 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1273 struct lov_stripe_md *lsm, obd_count page_count,
1274 struct brw_page **pga,
1275 struct ptlrpc_request **reqp,
1276 struct obd_capa *ocapa, int reserve,
1279 struct ptlrpc_request *req;
1280 struct ptlrpc_bulk_desc *desc;
1281 struct ost_body *body;
1282 struct obd_ioobj *ioobj;
1283 struct niobuf_remote *niobuf;
1284 int niocount, i, requested_nob, opc, rc;
1285 struct osc_brw_async_args *aa;
1286 struct req_capsule *pill;
1287 struct brw_page *pg_prev;
1290 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1291 RETURN(-ENOMEM); /* Recoverable */
1292 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1293 RETURN(-EINVAL); /* Fatal */
1295 if ((cmd & OBD_BRW_WRITE) != 0) {
1297 req = ptlrpc_request_alloc_pool(cli->cl_import,
1298 cli->cl_import->imp_rq_pool,
1299 &RQF_OST_BRW_WRITE);
1302 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1307 for (niocount = i = 1; i < page_count; i++) {
1308 if (!can_merge_pages(pga[i - 1], pga[i]))
1312 pill = &req->rq_pill;
1313 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1315 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1316 niocount * sizeof(*niobuf));
1317 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1319 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1321 ptlrpc_request_free(req);
1324 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1325 ptlrpc_at_set_req_timeout(req);
1327 if (opc == OST_WRITE)
1328 desc = ptlrpc_prep_bulk_imp(req, page_count,
1329 BULK_GET_SOURCE, OST_BULK_PORTAL);
1331 desc = ptlrpc_prep_bulk_imp(req, page_count,
1332 BULK_PUT_SINK, OST_BULK_PORTAL);
1335 GOTO(out, rc = -ENOMEM);
1336 /* NB request now owns desc and will free it when it gets freed */
1338 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1339 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1340 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1341 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1343 lustre_set_wire_obdo(&body->oa, oa);
1345 obdo_to_ioobj(oa, ioobj);
1346 ioobj->ioo_bufcnt = niocount;
1347 osc_pack_capa(req, body, ocapa);
1348 LASSERT (page_count > 0);
1350 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1351 struct brw_page *pg = pga[i];
1352 int poff = pg->off & ~CFS_PAGE_MASK;
1354 LASSERT(pg->count > 0);
1355 /* make sure there is no gap in the middle of page array */
1356 LASSERTF(page_count == 1 ||
1357 (ergo(i == 0, poff + pg->count == CFS_PAGE_SIZE) &&
1358 ergo(i > 0 && i < page_count - 1,
1359 poff == 0 && pg->count == CFS_PAGE_SIZE) &&
1360 ergo(i == page_count - 1, poff == 0)),
1361 "i: %d/%d pg: %p off: "LPU64", count: %u\n",
1362 i, page_count, pg, pg->off, pg->count);
1364 LASSERTF(i == 0 || pg->off > pg_prev->off,
1365 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1366 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1368 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1369 pg_prev->pg, page_private(pg_prev->pg),
1370 pg_prev->pg->index, pg_prev->off);
1372 LASSERTF(i == 0 || pg->off > pg_prev->off,
1373 "i %d p_c %u\n", i, page_count);
1375 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1376 (pg->flag & OBD_BRW_SRVLOCK));
1378 ptlrpc_prep_bulk_page(desc, pg->pg, poff, pg->count);
1379 requested_nob += pg->count;
1381 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1383 niobuf->len += pg->count;
1385 niobuf->offset = pg->off;
1386 niobuf->len = pg->count;
1387 niobuf->flags = pg->flag;
1392 LASSERTF((void *)(niobuf - niocount) ==
1393 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1394 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1395 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1397 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1399 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1400 body->oa.o_valid |= OBD_MD_FLFLAGS;
1401 body->oa.o_flags = 0;
1403 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1406 if (osc_should_shrink_grant(cli))
1407 osc_shrink_grant_local(cli, &body->oa);
1409 /* size[REQ_REC_OFF] still sizeof (*body) */
1410 if (opc == OST_WRITE) {
1411 if (unlikely(cli->cl_checksum) &&
1412 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1413 /* store cl_cksum_type in a local variable since
1414 * it can be changed via lprocfs */
1415 cksum_type_t cksum_type = cli->cl_cksum_type;
1417 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1418 oa->o_flags &= OBD_FL_LOCAL_MASK;
1419 body->oa.o_flags = 0;
1421 body->oa.o_flags |= cksum_type_pack(cksum_type);
1422 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1423 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1427 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1429 /* save this in 'oa', too, for later checking */
1430 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1431 oa->o_flags |= cksum_type_pack(cksum_type);
1433 /* clear out the checksum flag, in case this is a
1434 * resend but cl_checksum is no longer set. b=11238 */
1435 oa->o_valid &= ~OBD_MD_FLCKSUM;
1437 oa->o_cksum = body->oa.o_cksum;
1438 /* 1 RC per niobuf */
1439 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1440 sizeof(__u32) * niocount);
1442 if (unlikely(cli->cl_checksum) &&
1443 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1444 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1445 body->oa.o_flags = 0;
1446 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1447 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1450 ptlrpc_request_set_replen(req);
1452 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1453 aa = ptlrpc_req_async_args(req);
1455 aa->aa_requested_nob = requested_nob;
1456 aa->aa_nio_count = niocount;
1457 aa->aa_page_count = page_count;
1461 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1462 if (ocapa && reserve)
1463 aa->aa_ocapa = capa_get(ocapa);
1469 ptlrpc_req_finished(req);
1473 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1474 __u32 client_cksum, __u32 server_cksum, int nob,
1475 obd_count page_count, struct brw_page **pga,
1476 cksum_type_t client_cksum_type)
1480 cksum_type_t cksum_type;
1482 if (server_cksum == client_cksum) {
1483 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1487 /* If this is mmaped file - it can be changed at any time */
1488 if (oa->o_valid & OBD_MD_FLFLAGS && oa->o_flags & OBD_FL_MMAP)
1491 if (oa->o_valid & OBD_MD_FLFLAGS)
1492 cksum_type = cksum_type_unpack(oa->o_flags);
1494 cksum_type = OBD_CKSUM_CRC32;
1496 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1499 if (cksum_type != client_cksum_type)
1500 msg = "the server did not use the checksum type specified in "
1501 "the original request - likely a protocol problem";
1502 else if (new_cksum == server_cksum)
1503 msg = "changed on the client after we checksummed it - "
1504 "likely false positive due to mmap IO (bug 11742)";
1505 else if (new_cksum == client_cksum)
1506 msg = "changed in transit before arrival at OST";
1508 msg = "changed in transit AND doesn't match the original - "
1509 "likely false positive due to mmap IO (bug 11742)";
1511 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1512 " object "LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
1513 msg, libcfs_nid2str(peer->nid),
1514 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1515 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1516 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1518 oa->o_valid & OBD_MD_FLGROUP ? oa->o_seq : (__u64)0,
1520 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1521 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1522 "client csum now %x\n", client_cksum, client_cksum_type,
1523 server_cksum, cksum_type, new_cksum);
1527 /* Note rc enters this function as number of bytes transferred */
1528 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1530 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1531 const lnet_process_id_t *peer =
1532 &req->rq_import->imp_connection->c_peer;
1533 struct client_obd *cli = aa->aa_cli;
1534 struct ost_body *body;
1535 __u32 client_cksum = 0;
1538 if (rc < 0 && rc != -EDQUOT) {
1539 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1543 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1544 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1546 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1550 #ifdef HAVE_QUOTA_SUPPORT
1551 /* set/clear over quota flag for a uid/gid */
1552 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1553 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1554 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1556 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid "LPX64", flags %x\n",
1557 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1559 lquota_setdq(quota_interface, cli, qid, body->oa.o_valid,
1564 osc_update_grant(cli, body);
1569 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1570 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1572 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1574 CERROR("Unexpected +ve rc %d\n", rc);
1577 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1579 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1582 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1583 check_write_checksum(&body->oa, peer, client_cksum,
1584 body->oa.o_cksum, aa->aa_requested_nob,
1585 aa->aa_page_count, aa->aa_ppga,
1586 cksum_type_unpack(aa->aa_oa->o_flags)))
1589 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1590 aa->aa_page_count, aa->aa_ppga);
1594 /* The rest of this function executes only for OST_READs */
1596 /* if unwrap_bulk failed, return -EAGAIN to retry */
1597 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1599 GOTO(out, rc = -EAGAIN);
1601 if (rc > aa->aa_requested_nob) {
1602 CERROR("Unexpected rc %d (%d requested)\n", rc,
1603 aa->aa_requested_nob);
1607 if (rc != req->rq_bulk->bd_nob_transferred) {
1608 CERROR ("Unexpected rc %d (%d transferred)\n",
1609 rc, req->rq_bulk->bd_nob_transferred);
1613 if (rc < aa->aa_requested_nob)
1614 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1616 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1617 static int cksum_counter;
1618 __u32 server_cksum = body->oa.o_cksum;
1621 cksum_type_t cksum_type;
1623 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1624 cksum_type = cksum_type_unpack(body->oa.o_flags);
1626 cksum_type = OBD_CKSUM_CRC32;
1627 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1628 aa->aa_ppga, OST_READ,
1631 if (peer->nid == req->rq_bulk->bd_sender) {
1635 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1638 if (server_cksum == ~0 && rc > 0) {
1639 CERROR("Protocol error: server %s set the 'checksum' "
1640 "bit, but didn't send a checksum. Not fatal, "
1641 "but please notify on http://bugs.whamcloud.com/\n",
1642 libcfs_nid2str(peer->nid));
1643 } else if (server_cksum != client_cksum) {
1644 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1645 "%s%s%s inode "DFID" object "
1646 LPU64"/"LPU64" extent "
1647 "["LPU64"-"LPU64"]\n",
1648 req->rq_import->imp_obd->obd_name,
1649 libcfs_nid2str(peer->nid),
1651 body->oa.o_valid & OBD_MD_FLFID ?
1652 body->oa.o_parent_seq : (__u64)0,
1653 body->oa.o_valid & OBD_MD_FLFID ?
1654 body->oa.o_parent_oid : 0,
1655 body->oa.o_valid & OBD_MD_FLFID ?
1656 body->oa.o_parent_ver : 0,
1658 body->oa.o_valid & OBD_MD_FLGROUP ?
1659 body->oa.o_seq : (__u64)0,
1660 aa->aa_ppga[0]->off,
1661 aa->aa_ppga[aa->aa_page_count-1]->off +
1662 aa->aa_ppga[aa->aa_page_count-1]->count -
1664 CERROR("client %x, server %x, cksum_type %x\n",
1665 client_cksum, server_cksum, cksum_type);
1667 aa->aa_oa->o_cksum = client_cksum;
1671 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1674 } else if (unlikely(client_cksum)) {
1675 static int cksum_missed;
1678 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1679 CERROR("Checksum %u requested from %s but not sent\n",
1680 cksum_missed, libcfs_nid2str(peer->nid));
1686 lustre_get_wire_obdo(aa->aa_oa, &body->oa);
1691 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1692 struct lov_stripe_md *lsm,
1693 obd_count page_count, struct brw_page **pga,
1694 struct obd_capa *ocapa)
1696 struct ptlrpc_request *req;
1700 struct l_wait_info lwi;
1704 cfs_waitq_init(&waitq);
1707 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1708 page_count, pga, &req, ocapa, 0, resends);
1712 rc = ptlrpc_queue_wait(req);
1714 if (rc == -ETIMEDOUT && req->rq_resend) {
1715 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1716 ptlrpc_req_finished(req);
1720 rc = osc_brw_fini_request(req, rc);
1722 ptlrpc_req_finished(req);
1723 if (osc_recoverable_error(rc)) {
1725 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
1726 CERROR("too many resend retries, returning error\n");
1730 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1731 l_wait_event(waitq, 0, &lwi);
1739 int osc_brw_redo_request(struct ptlrpc_request *request,
1740 struct osc_brw_async_args *aa)
1742 struct ptlrpc_request *new_req;
1743 struct ptlrpc_request_set *set = request->rq_set;
1744 struct osc_brw_async_args *new_aa;
1745 struct osc_async_page *oap;
1749 if (!client_should_resend(aa->aa_resends, aa->aa_cli)) {
1750 CERROR("too many resent retries, returning error\n");
1754 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1756 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1757 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1758 aa->aa_cli, aa->aa_oa,
1759 NULL /* lsm unused by osc currently */,
1760 aa->aa_page_count, aa->aa_ppga,
1761 &new_req, aa->aa_ocapa, 0, 1);
1765 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1767 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1768 if (oap->oap_request != NULL) {
1769 LASSERTF(request == oap->oap_request,
1770 "request %p != oap_request %p\n",
1771 request, oap->oap_request);
1772 if (oap->oap_interrupted) {
1773 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1774 ptlrpc_req_finished(new_req);
1779 /* New request takes over pga and oaps from old request.
1780 * Note that copying a list_head doesn't work, need to move it... */
1782 new_req->rq_interpret_reply = request->rq_interpret_reply;
1783 new_req->rq_async_args = request->rq_async_args;
1784 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1786 new_aa = ptlrpc_req_async_args(new_req);
1788 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1789 cfs_list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1790 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1792 cfs_list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1793 if (oap->oap_request) {
1794 ptlrpc_req_finished(oap->oap_request);
1795 oap->oap_request = ptlrpc_request_addref(new_req);
1799 new_aa->aa_ocapa = aa->aa_ocapa;
1800 aa->aa_ocapa = NULL;
1802 /* use ptlrpc_set_add_req is safe because interpret functions work
1803 * in check_set context. only one way exist with access to request
1804 * from different thread got -EINTR - this way protected with
1805 * cl_loi_list_lock */
1806 ptlrpc_set_add_req(set, new_req);
1808 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1810 DEBUG_REQ(D_INFO, new_req, "new request");
1815 * ugh, we want disk allocation on the target to happen in offset order. we'll
1816 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1817 * fine for our small page arrays and doesn't require allocation. its an
1818 * insertion sort that swaps elements that are strides apart, shrinking the
1819 * stride down until its '1' and the array is sorted.
1821 static void sort_brw_pages(struct brw_page **array, int num)
1824 struct brw_page *tmp;
1828 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1833 for (i = stride ; i < num ; i++) {
1836 while (j >= stride && array[j - stride]->off > tmp->off) {
1837 array[j] = array[j - stride];
1842 } while (stride > 1);
1845 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1851 LASSERT (pages > 0);
1852 offset = pg[i]->off & ~CFS_PAGE_MASK;
1856 if (pages == 0) /* that's all */
1859 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1860 return count; /* doesn't end on page boundary */
1863 offset = pg[i]->off & ~CFS_PAGE_MASK;
1864 if (offset != 0) /* doesn't start on page boundary */
1871 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1873 struct brw_page **ppga;
1876 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1880 for (i = 0; i < count; i++)
1885 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1887 LASSERT(ppga != NULL);
1888 OBD_FREE(ppga, sizeof(*ppga) * count);
1891 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1892 obd_count page_count, struct brw_page *pga,
1893 struct obd_trans_info *oti)
1895 struct obdo *saved_oa = NULL;
1896 struct brw_page **ppga, **orig;
1897 struct obd_import *imp = class_exp2cliimp(exp);
1898 struct client_obd *cli;
1899 int rc, page_count_orig;
1902 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1903 cli = &imp->imp_obd->u.cli;
1905 if (cmd & OBD_BRW_CHECK) {
1906 /* The caller just wants to know if there's a chance that this
1907 * I/O can succeed */
1909 if (imp->imp_invalid)
1914 /* test_brw with a failed create can trip this, maybe others. */
1915 LASSERT(cli->cl_max_pages_per_rpc);
1919 orig = ppga = osc_build_ppga(pga, page_count);
1922 page_count_orig = page_count;
1924 sort_brw_pages(ppga, page_count);
1925 while (page_count) {
1926 obd_count pages_per_brw;
1928 if (page_count > cli->cl_max_pages_per_rpc)
1929 pages_per_brw = cli->cl_max_pages_per_rpc;
1931 pages_per_brw = page_count;
1933 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1935 if (saved_oa != NULL) {
1936 /* restore previously saved oa */
1937 *oinfo->oi_oa = *saved_oa;
1938 } else if (page_count > pages_per_brw) {
1939 /* save a copy of oa (brw will clobber it) */
1940 OBDO_ALLOC(saved_oa);
1941 if (saved_oa == NULL)
1942 GOTO(out, rc = -ENOMEM);
1943 *saved_oa = *oinfo->oi_oa;
1946 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1947 pages_per_brw, ppga, oinfo->oi_capa);
1952 page_count -= pages_per_brw;
1953 ppga += pages_per_brw;
1957 osc_release_ppga(orig, page_count_orig);
1959 if (saved_oa != NULL)
1960 OBDO_FREE(saved_oa);
1965 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1966 * the dirty accounting. Writeback completes or truncate happens before
1967 * writing starts. Must be called with the loi lock held. */
1968 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1971 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1975 /* This maintains the lists of pending pages to read/write for a given object
1976 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1977 * to quickly find objects that are ready to send an RPC. */
1978 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1984 if (lop->lop_num_pending == 0)
1987 /* if we have an invalid import we want to drain the queued pages
1988 * by forcing them through rpcs that immediately fail and complete
1989 * the pages. recovery relies on this to empty the queued pages
1990 * before canceling the locks and evicting down the llite pages */
1991 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1994 /* stream rpcs in queue order as long as as there is an urgent page
1995 * queued. this is our cheap solution for good batching in the case
1996 * where writepage marks some random page in the middle of the file
1997 * as urgent because of, say, memory pressure */
1998 if (!cfs_list_empty(&lop->lop_urgent)) {
1999 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
2002 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
2003 optimal = cli->cl_max_pages_per_rpc;
2004 if (cmd & OBD_BRW_WRITE) {
2005 /* trigger a write rpc stream as long as there are dirtiers
2006 * waiting for space. as they're waiting, they're not going to
2007 * create more pages to coalesce with what's waiting.. */
2008 if (!cfs_list_empty(&cli->cl_cache_waiters)) {
2009 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
2012 /* +16 to avoid triggering rpcs that would want to include pages
2013 * that are being queued but which can't be made ready until
2014 * the queuer finishes with the page. this is a wart for
2015 * llite::commit_write() */
2018 if (lop->lop_num_pending >= optimal)
2024 static int lop_makes_hprpc(struct loi_oap_pages *lop)
2026 struct osc_async_page *oap;
2029 if (cfs_list_empty(&lop->lop_urgent))
2032 oap = cfs_list_entry(lop->lop_urgent.next,
2033 struct osc_async_page, oap_urgent_item);
2035 if (oap->oap_async_flags & ASYNC_HP) {
2036 CDEBUG(D_CACHE, "hp request forcing RPC\n");
2043 static void on_list(cfs_list_t *item, cfs_list_t *list,
2046 if (cfs_list_empty(item) && should_be_on)
2047 cfs_list_add_tail(item, list);
2048 else if (!cfs_list_empty(item) && !should_be_on)
2049 cfs_list_del_init(item);
2052 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
2053 * can find pages to build into rpcs quickly */
2054 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
2056 if (lop_makes_hprpc(&loi->loi_write_lop) ||
2057 lop_makes_hprpc(&loi->loi_read_lop)) {
2059 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
2060 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
2062 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
2063 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
2064 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
2065 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
2068 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
2069 loi->loi_write_lop.lop_num_pending);
2071 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
2072 loi->loi_read_lop.lop_num_pending);
2075 static void lop_update_pending(struct client_obd *cli,
2076 struct loi_oap_pages *lop, int cmd, int delta)
2078 lop->lop_num_pending += delta;
2079 if (cmd & OBD_BRW_WRITE)
2080 cli->cl_pending_w_pages += delta;
2082 cli->cl_pending_r_pages += delta;
2086 * this is called when a sync waiter receives an interruption. Its job is to
2087 * get the caller woken as soon as possible. If its page hasn't been put in an
2088 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
2089 * desiring interruption which will forcefully complete the rpc once the rpc
2092 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
2094 struct loi_oap_pages *lop;
2095 struct lov_oinfo *loi;
2099 LASSERT(!oap->oap_interrupted);
2100 oap->oap_interrupted = 1;
2102 /* ok, it's been put in an rpc. only one oap gets a request reference */
2103 if (oap->oap_request != NULL) {
2104 ptlrpc_mark_interrupted(oap->oap_request);
2105 ptlrpcd_wake(oap->oap_request);
2106 ptlrpc_req_finished(oap->oap_request);
2107 oap->oap_request = NULL;
2111 * page completion may be called only if ->cpo_prep() method was
2112 * executed by osc_io_submit(), that also adds page the to pending list
2114 if (!cfs_list_empty(&oap->oap_pending_item)) {
2115 cfs_list_del_init(&oap->oap_pending_item);
2116 cfs_list_del_init(&oap->oap_urgent_item);
2119 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2120 &loi->loi_write_lop : &loi->loi_read_lop;
2121 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2122 loi_list_maint(oap->oap_cli, oap->oap_loi);
2123 rc = oap->oap_caller_ops->ap_completion(env,
2124 oap->oap_caller_data,
2125 oap->oap_cmd, NULL, -EINTR);
2131 /* this is trying to propogate async writeback errors back up to the
2132 * application. As an async write fails we record the error code for later if
2133 * the app does an fsync. As long as errors persist we force future rpcs to be
2134 * sync so that the app can get a sync error and break the cycle of queueing
2135 * pages for which writeback will fail. */
2136 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2143 ar->ar_force_sync = 1;
2144 ar->ar_min_xid = ptlrpc_sample_next_xid();
2149 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2150 ar->ar_force_sync = 0;
2153 void osc_oap_to_pending(struct osc_async_page *oap)
2155 struct loi_oap_pages *lop;
2157 if (oap->oap_cmd & OBD_BRW_WRITE)
2158 lop = &oap->oap_loi->loi_write_lop;
2160 lop = &oap->oap_loi->loi_read_lop;
2162 if (oap->oap_async_flags & ASYNC_HP)
2163 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2164 else if (oap->oap_async_flags & ASYNC_URGENT)
2165 cfs_list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2166 cfs_list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2167 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2170 /* this must be called holding the loi list lock to give coverage to exit_cache,
2171 * async_flag maintenance, and oap_request */
2172 static void osc_ap_completion(const struct lu_env *env,
2173 struct client_obd *cli, struct obdo *oa,
2174 struct osc_async_page *oap, int sent, int rc)
2179 if (oap->oap_request != NULL) {
2180 xid = ptlrpc_req_xid(oap->oap_request);
2181 ptlrpc_req_finished(oap->oap_request);
2182 oap->oap_request = NULL;
2185 cfs_spin_lock(&oap->oap_lock);
2186 oap->oap_async_flags = 0;
2187 cfs_spin_unlock(&oap->oap_lock);
2188 oap->oap_interrupted = 0;
2190 if (oap->oap_cmd & OBD_BRW_WRITE) {
2191 osc_process_ar(&cli->cl_ar, xid, rc);
2192 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2195 if (rc == 0 && oa != NULL) {
2196 if (oa->o_valid & OBD_MD_FLBLOCKS)
2197 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2198 if (oa->o_valid & OBD_MD_FLMTIME)
2199 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2200 if (oa->o_valid & OBD_MD_FLATIME)
2201 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2202 if (oa->o_valid & OBD_MD_FLCTIME)
2203 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2206 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2207 oap->oap_cmd, oa, rc);
2209 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2210 * I/O on the page could start, but OSC calls it under lock
2211 * and thus we can add oap back to pending safely */
2213 /* upper layer wants to leave the page on pending queue */
2214 osc_oap_to_pending(oap);
2216 osc_exit_cache(cli, oap, sent);
2220 static int brw_interpret(const struct lu_env *env,
2221 struct ptlrpc_request *req, void *data, int rc)
2223 struct osc_brw_async_args *aa = data;
2224 struct client_obd *cli;
2228 rc = osc_brw_fini_request(req, rc);
2229 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2230 if (osc_recoverable_error(rc)) {
2231 /* Only retry once for mmaped files since the mmaped page
2232 * might be modified at anytime. We have to retry at least
2233 * once in case there WAS really a corruption of the page
2234 * on the network, that was not caused by mmap() modifying
2235 * the page. Bug11742 */
2236 if ((rc == -EAGAIN) && (aa->aa_resends > 0) &&
2237 aa->aa_oa->o_valid & OBD_MD_FLFLAGS &&
2238 aa->aa_oa->o_flags & OBD_FL_MMAP) {
2241 rc = osc_brw_redo_request(req, aa);
2248 capa_put(aa->aa_ocapa);
2249 aa->aa_ocapa = NULL;
2254 client_obd_list_lock(&cli->cl_loi_list_lock);
2256 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2257 * is called so we know whether to go to sync BRWs or wait for more
2258 * RPCs to complete */
2259 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2260 cli->cl_w_in_flight--;
2262 cli->cl_r_in_flight--;
2264 async = cfs_list_empty(&aa->aa_oaps);
2265 if (!async) { /* from osc_send_oap_rpc() */
2266 struct osc_async_page *oap, *tmp;
2267 /* the caller may re-use the oap after the completion call so
2268 * we need to clean it up a little */
2269 cfs_list_for_each_entry_safe(oap, tmp, &aa->aa_oaps,
2271 cfs_list_del_init(&oap->oap_rpc_item);
2272 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2274 OBDO_FREE(aa->aa_oa);
2275 } else { /* from async_internal() */
2277 for (i = 0; i < aa->aa_page_count; i++)
2278 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2280 osc_wake_cache_waiters(cli);
2281 osc_check_rpcs(env, cli);
2282 client_obd_list_unlock(&cli->cl_loi_list_lock);
2284 cl_req_completion(env, aa->aa_clerq, rc);
2285 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2290 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2291 struct client_obd *cli,
2292 cfs_list_t *rpc_list,
2293 int page_count, int cmd)
2295 struct ptlrpc_request *req;
2296 struct brw_page **pga = NULL;
2297 struct osc_brw_async_args *aa;
2298 struct obdo *oa = NULL;
2299 const struct obd_async_page_ops *ops = NULL;
2300 void *caller_data = NULL;
2301 struct osc_async_page *oap;
2302 struct osc_async_page *tmp;
2303 struct ost_body *body;
2304 struct cl_req *clerq = NULL;
2305 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2306 struct ldlm_lock *lock = NULL;
2307 struct cl_req_attr crattr;
2308 int i, rc, mpflag = 0;
2311 LASSERT(!cfs_list_empty(rpc_list));
2313 if (cmd & OBD_BRW_MEMALLOC)
2314 mpflag = cfs_memory_pressure_get_and_set();
2316 memset(&crattr, 0, sizeof crattr);
2317 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2319 GOTO(out, req = ERR_PTR(-ENOMEM));
2323 GOTO(out, req = ERR_PTR(-ENOMEM));
2326 cfs_list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2327 struct cl_page *page = osc_oap2cl_page(oap);
2329 ops = oap->oap_caller_ops;
2330 caller_data = oap->oap_caller_data;
2332 clerq = cl_req_alloc(env, page, crt,
2333 1 /* only 1-object rpcs for
2336 GOTO(out, req = (void *)clerq);
2337 lock = oap->oap_ldlm_lock;
2339 pga[i] = &oap->oap_brw_page;
2340 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2341 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2342 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2344 cl_req_page_add(env, clerq, page);
2347 /* always get the data for the obdo for the rpc */
2348 LASSERT(ops != NULL);
2350 crattr.cra_capa = NULL;
2351 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2353 oa->o_handle = lock->l_remote_handle;
2354 oa->o_valid |= OBD_MD_FLHANDLE;
2357 rc = cl_req_prep(env, clerq);
2359 CERROR("cl_req_prep failed: %d\n", rc);
2360 GOTO(out, req = ERR_PTR(rc));
2363 sort_brw_pages(pga, page_count);
2364 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2365 pga, &req, crattr.cra_capa, 1, 0);
2367 CERROR("prep_req failed: %d\n", rc);
2368 GOTO(out, req = ERR_PTR(rc));
2371 if (cmd & OBD_BRW_MEMALLOC)
2372 req->rq_memalloc = 1;
2374 /* Need to update the timestamps after the request is built in case
2375 * we race with setattr (locally or in queue at OST). If OST gets
2376 * later setattr before earlier BRW (as determined by the request xid),
2377 * the OST will not use BRW timestamps. Sadly, there is no obvious
2378 * way to do this in a single call. bug 10150 */
2379 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2380 cl_req_attr_set(env, clerq, &crattr,
2381 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2383 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2384 aa = ptlrpc_req_async_args(req);
2385 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2386 cfs_list_splice(rpc_list, &aa->aa_oaps);
2387 CFS_INIT_LIST_HEAD(rpc_list);
2388 aa->aa_clerq = clerq;
2390 if (cmd & OBD_BRW_MEMALLOC)
2391 cfs_memory_pressure_restore(mpflag);
2393 capa_put(crattr.cra_capa);
2398 OBD_FREE(pga, sizeof(*pga) * page_count);
2399 /* this should happen rarely and is pretty bad, it makes the
2400 * pending list not follow the dirty order */
2401 client_obd_list_lock(&cli->cl_loi_list_lock);
2402 cfs_list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2403 cfs_list_del_init(&oap->oap_rpc_item);
2405 /* queued sync pages can be torn down while the pages
2406 * were between the pending list and the rpc */
2407 if (oap->oap_interrupted) {
2408 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2409 osc_ap_completion(env, cli, NULL, oap, 0,
2413 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2415 if (clerq && !IS_ERR(clerq))
2416 cl_req_completion(env, clerq, PTR_ERR(req));
2422 * prepare pages for ASYNC io and put pages in send queue.
2424 * \param cmd OBD_BRW_* macroses
2425 * \param lop pending pages
2427 * \return zero if no page added to send queue.
2428 * \return 1 if pages successfully added to send queue.
2429 * \return negative on errors.
2432 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2433 struct lov_oinfo *loi,
2434 int cmd, struct loi_oap_pages *lop)
2436 struct ptlrpc_request *req;
2437 obd_count page_count = 0;
2438 struct osc_async_page *oap = NULL, *tmp;
2439 struct osc_brw_async_args *aa;
2440 const struct obd_async_page_ops *ops;
2441 CFS_LIST_HEAD(rpc_list);
2442 int srvlock = 0, mem_tight = 0;
2443 struct cl_object *clob = NULL;
2444 obd_off starting_offset = OBD_OBJECT_EOF;
2445 unsigned int ending_offset;
2446 int starting_page_off = 0;
2449 /* ASYNC_HP pages first. At present, when the lock the pages is
2450 * to be canceled, the pages covered by the lock will be sent out
2451 * with ASYNC_HP. We have to send out them as soon as possible. */
2452 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_urgent, oap_urgent_item) {
2453 if (oap->oap_async_flags & ASYNC_HP)
2454 cfs_list_move(&oap->oap_pending_item, &lop->lop_pending);
2455 if (++page_count >= cli->cl_max_pages_per_rpc)
2460 /* first we find the pages we're allowed to work with */
2461 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2463 ops = oap->oap_caller_ops;
2465 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2466 "magic 0x%x\n", oap, oap->oap_magic);
2469 /* pin object in memory, so that completion call-backs
2470 * can be safely called under client_obd_list lock. */
2471 clob = osc_oap2cl_page(oap)->cp_obj;
2472 cl_object_get(clob);
2475 if (page_count != 0 &&
2476 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2477 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2478 " oap %p, page %p, srvlock %u\n",
2479 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2483 /* If there is a gap at the start of this page, it can't merge
2484 * with any previous page, so we'll hand the network a
2485 * "fragmented" page array that it can't transfer in 1 RDMA */
2486 if (oap->oap_obj_off < starting_offset) {
2487 if (starting_page_off != 0)
2490 starting_page_off = oap->oap_page_off;
2491 starting_offset = oap->oap_obj_off + starting_page_off;
2492 } else if (oap->oap_page_off != 0)
2495 /* in llite being 'ready' equates to the page being locked
2496 * until completion unlocks it. commit_write submits a page
2497 * as not ready because its unlock will happen unconditionally
2498 * as the call returns. if we race with commit_write giving
2499 * us that page we don't want to create a hole in the page
2500 * stream, so we stop and leave the rpc to be fired by
2501 * another dirtier or kupdated interval (the not ready page
2502 * will still be on the dirty list). we could call in
2503 * at the end of ll_file_write to process the queue again. */
2504 if (!(oap->oap_async_flags & ASYNC_READY)) {
2505 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2508 CDEBUG(D_INODE, "oap %p page %p returned %d "
2509 "instead of ready\n", oap,
2513 /* llite is telling us that the page is still
2514 * in commit_write and that we should try
2515 * and put it in an rpc again later. we
2516 * break out of the loop so we don't create
2517 * a hole in the sequence of pages in the rpc
2522 /* the io isn't needed.. tell the checks
2523 * below to complete the rpc with EINTR */
2524 cfs_spin_lock(&oap->oap_lock);
2525 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2526 cfs_spin_unlock(&oap->oap_lock);
2527 oap->oap_count = -EINTR;
2530 cfs_spin_lock(&oap->oap_lock);
2531 oap->oap_async_flags |= ASYNC_READY;
2532 cfs_spin_unlock(&oap->oap_lock);
2535 LASSERTF(0, "oap %p page %p returned %d "
2536 "from make_ready\n", oap,
2544 * Page submitted for IO has to be locked. Either by
2545 * ->ap_make_ready() or by higher layers.
2547 #if defined(__KERNEL__) && defined(__linux__)
2549 struct cl_page *page;
2551 page = osc_oap2cl_page(oap);
2553 if (page->cp_type == CPT_CACHEABLE &&
2554 !(PageLocked(oap->oap_page) &&
2555 (CheckWriteback(oap->oap_page, cmd)))) {
2556 CDEBUG(D_PAGE, "page %p lost wb %lx/%x\n",
2558 (long)oap->oap_page->flags,
2559 oap->oap_async_flags);
2565 /* take the page out of our book-keeping */
2566 cfs_list_del_init(&oap->oap_pending_item);
2567 lop_update_pending(cli, lop, cmd, -1);
2568 cfs_list_del_init(&oap->oap_urgent_item);
2570 /* ask the caller for the size of the io as the rpc leaves. */
2571 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2573 ops->ap_refresh_count(env, oap->oap_caller_data,
2575 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2577 if (oap->oap_count <= 0) {
2578 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2580 osc_ap_completion(env, cli, NULL,
2581 oap, 0, oap->oap_count);
2585 /* now put the page back in our accounting */
2586 cfs_list_add_tail(&oap->oap_rpc_item, &rpc_list);
2587 if (page_count++ == 0) {
2588 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2589 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2590 (PTLRPC_MAX_BRW_SIZE - 1);
2593 if (oap->oap_brw_flags & OBD_BRW_MEMALLOC)
2596 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2597 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2598 * have the same alignment as the initial writes that allocated
2599 * extents on the server. */
2600 ending_offset = oap->oap_obj_off + oap->oap_page_off +
2602 if (!(ending_offset & (PTLRPC_MAX_BRW_SIZE - 1)))
2605 if (page_count >= cli->cl_max_pages_per_rpc)
2608 /* If there is a gap at the end of this page, it can't merge
2609 * with any subsequent pages, so we'll hand the network a
2610 * "fragmented" page array that it can't transfer in 1 RDMA */
2611 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2615 osc_wake_cache_waiters(cli);
2617 loi_list_maint(cli, loi);
2619 client_obd_list_unlock(&cli->cl_loi_list_lock);
2622 cl_object_put(env, clob);
2624 if (page_count == 0) {
2625 client_obd_list_lock(&cli->cl_loi_list_lock);
2629 req = osc_build_req(env, cli, &rpc_list, page_count,
2630 mem_tight ? (cmd | OBD_BRW_MEMALLOC) : cmd);
2632 LASSERT(cfs_list_empty(&rpc_list));
2633 loi_list_maint(cli, loi);
2634 RETURN(PTR_ERR(req));
2637 aa = ptlrpc_req_async_args(req);
2639 starting_offset &= PTLRPC_MAX_BRW_SIZE - 1;
2640 if (cmd == OBD_BRW_READ) {
2641 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2642 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2643 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2644 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2646 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2647 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2648 cli->cl_w_in_flight);
2649 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2650 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2652 ptlrpc_lprocfs_brw(req, aa->aa_requested_nob);
2654 client_obd_list_lock(&cli->cl_loi_list_lock);
2656 if (cmd == OBD_BRW_READ)
2657 cli->cl_r_in_flight++;
2659 cli->cl_w_in_flight++;
2661 /* queued sync pages can be torn down while the pages
2662 * were between the pending list and the rpc */
2664 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2665 /* only one oap gets a request reference */
2668 if (oap->oap_interrupted && !req->rq_intr) {
2669 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2671 ptlrpc_mark_interrupted(req);
2675 tmp->oap_request = ptlrpc_request_addref(req);
2677 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2678 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2680 req->rq_interpret_reply = brw_interpret;
2681 ptlrpcd_add_req(req, PSCOPE_BRW);
2685 #define LOI_DEBUG(LOI, STR, args...) \
2686 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2687 !cfs_list_empty(&(LOI)->loi_ready_item) || \
2688 !cfs_list_empty(&(LOI)->loi_hp_ready_item), \
2689 (LOI)->loi_write_lop.lop_num_pending, \
2690 !cfs_list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2691 (LOI)->loi_read_lop.lop_num_pending, \
2692 !cfs_list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2695 /* This is called by osc_check_rpcs() to find which objects have pages that
2696 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2697 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2701 /* First return objects that have blocked locks so that they
2702 * will be flushed quickly and other clients can get the lock,
2703 * then objects which have pages ready to be stuffed into RPCs */
2704 if (!cfs_list_empty(&cli->cl_loi_hp_ready_list))
2705 RETURN(cfs_list_entry(cli->cl_loi_hp_ready_list.next,
2706 struct lov_oinfo, loi_hp_ready_item));
2707 if (!cfs_list_empty(&cli->cl_loi_ready_list))
2708 RETURN(cfs_list_entry(cli->cl_loi_ready_list.next,
2709 struct lov_oinfo, loi_ready_item));
2711 /* then if we have cache waiters, return all objects with queued
2712 * writes. This is especially important when many small files
2713 * have filled up the cache and not been fired into rpcs because
2714 * they don't pass the nr_pending/object threshhold */
2715 if (!cfs_list_empty(&cli->cl_cache_waiters) &&
2716 !cfs_list_empty(&cli->cl_loi_write_list))
2717 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2718 struct lov_oinfo, loi_write_item));
2720 /* then return all queued objects when we have an invalid import
2721 * so that they get flushed */
2722 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2723 if (!cfs_list_empty(&cli->cl_loi_write_list))
2724 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2727 if (!cfs_list_empty(&cli->cl_loi_read_list))
2728 RETURN(cfs_list_entry(cli->cl_loi_read_list.next,
2729 struct lov_oinfo, loi_read_item));
2734 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2736 struct osc_async_page *oap;
2739 if (!cfs_list_empty(&loi->loi_write_lop.lop_urgent)) {
2740 oap = cfs_list_entry(loi->loi_write_lop.lop_urgent.next,
2741 struct osc_async_page, oap_urgent_item);
2742 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2745 if (!hprpc && !cfs_list_empty(&loi->loi_read_lop.lop_urgent)) {
2746 oap = cfs_list_entry(loi->loi_read_lop.lop_urgent.next,
2747 struct osc_async_page, oap_urgent_item);
2748 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2751 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2754 /* called with the loi list lock held */
2755 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2757 struct lov_oinfo *loi;
2758 int rc = 0, race_counter = 0;
2761 while ((loi = osc_next_loi(cli)) != NULL) {
2762 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2764 if (osc_max_rpc_in_flight(cli, loi))
2767 /* attempt some read/write balancing by alternating between
2768 * reads and writes in an object. The makes_rpc checks here
2769 * would be redundant if we were getting read/write work items
2770 * instead of objects. we don't want send_oap_rpc to drain a
2771 * partial read pending queue when we're given this object to
2772 * do io on writes while there are cache waiters */
2773 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2774 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2775 &loi->loi_write_lop);
2777 CERROR("Write request failed with %d\n", rc);
2779 /* osc_send_oap_rpc failed, mostly because of
2782 * It can't break here, because if:
2783 * - a page was submitted by osc_io_submit, so
2785 * - no request in flight
2786 * - no subsequent request
2787 * The system will be in live-lock state,
2788 * because there is no chance to call
2789 * osc_io_unplug() and osc_check_rpcs() any
2790 * more. pdflush can't help in this case,
2791 * because it might be blocked at grabbing
2792 * the page lock as we mentioned.
2794 * Anyway, continue to drain pages. */
2803 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2804 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2805 &loi->loi_read_lop);
2807 CERROR("Read request failed with %d\n", rc);
2815 /* attempt some inter-object balancing by issuing rpcs
2816 * for each object in turn */
2817 if (!cfs_list_empty(&loi->loi_hp_ready_item))
2818 cfs_list_del_init(&loi->loi_hp_ready_item);
2819 if (!cfs_list_empty(&loi->loi_ready_item))
2820 cfs_list_del_init(&loi->loi_ready_item);
2821 if (!cfs_list_empty(&loi->loi_write_item))
2822 cfs_list_del_init(&loi->loi_write_item);
2823 if (!cfs_list_empty(&loi->loi_read_item))
2824 cfs_list_del_init(&loi->loi_read_item);
2826 loi_list_maint(cli, loi);
2828 /* send_oap_rpc fails with 0 when make_ready tells it to
2829 * back off. llite's make_ready does this when it tries
2830 * to lock a page queued for write that is already locked.
2831 * we want to try sending rpcs from many objects, but we
2832 * don't want to spin failing with 0. */
2833 if (race_counter == 10)
2839 /* we're trying to queue a page in the osc so we're subject to the
2840 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2841 * If the osc's queued pages are already at that limit, then we want to sleep
2842 * until there is space in the osc's queue for us. We also may be waiting for
2843 * write credits from the OST if there are RPCs in flight that may return some
2844 * before we fall back to sync writes.
2846 * We need this know our allocation was granted in the presence of signals */
2847 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2851 client_obd_list_lock(&cli->cl_loi_list_lock);
2852 rc = cfs_list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2853 client_obd_list_unlock(&cli->cl_loi_list_lock);
2858 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2861 int osc_enter_cache_try(const struct lu_env *env,
2862 struct client_obd *cli, struct lov_oinfo *loi,
2863 struct osc_async_page *oap, int transient)
2867 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2869 osc_consume_write_grant(cli, &oap->oap_brw_page);
2871 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2872 cfs_atomic_inc(&obd_dirty_transit_pages);
2873 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2879 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2880 * grant or cache space. */
2881 static int osc_enter_cache(const struct lu_env *env,
2882 struct client_obd *cli, struct lov_oinfo *loi,
2883 struct osc_async_page *oap)
2885 struct osc_cache_waiter ocw;
2886 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
2890 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2891 "grant: %lu\n", cli->cl_dirty, cfs_atomic_read(&obd_dirty_pages),
2892 cli->cl_dirty_max, obd_max_dirty_pages,
2893 cli->cl_lost_grant, cli->cl_avail_grant);
2895 /* force the caller to try sync io. this can jump the list
2896 * of queued writes and create a discontiguous rpc stream */
2897 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_NO_GRANT) ||
2898 cli->cl_dirty_max < CFS_PAGE_SIZE ||
2899 cli->cl_ar.ar_force_sync || loi->loi_ar.ar_force_sync)
2902 /* Hopefully normal case - cache space and write credits available */
2903 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2904 cfs_atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2905 osc_enter_cache_try(env, cli, loi, oap, 0))
2908 /* It is safe to block as a cache waiter as long as there is grant
2909 * space available or the hope of additional grant being returned
2910 * when an in flight write completes. Using the write back cache
2911 * if possible is preferable to sending the data synchronously
2912 * because write pages can then be merged in to large requests.
2913 * The addition of this cache waiter will causing pending write
2914 * pages to be sent immediately. */
2915 if (cli->cl_w_in_flight || cli->cl_avail_grant >= CFS_PAGE_SIZE) {
2916 cfs_list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2917 cfs_waitq_init(&ocw.ocw_waitq);
2921 loi_list_maint(cli, loi);
2922 osc_check_rpcs(env, cli);
2923 client_obd_list_unlock(&cli->cl_loi_list_lock);
2925 CDEBUG(D_CACHE, "sleeping for cache space\n");
2926 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2928 client_obd_list_lock(&cli->cl_loi_list_lock);
2929 if (!cfs_list_empty(&ocw.ocw_entry)) {
2930 cfs_list_del(&ocw.ocw_entry);
2940 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2941 struct lov_oinfo *loi, cfs_page_t *page,
2942 obd_off offset, const struct obd_async_page_ops *ops,
2943 void *data, void **res, int nocache,
2944 struct lustre_handle *lockh)
2946 struct osc_async_page *oap;
2951 return cfs_size_round(sizeof(*oap));
2954 oap->oap_magic = OAP_MAGIC;
2955 oap->oap_cli = &exp->exp_obd->u.cli;
2958 oap->oap_caller_ops = ops;
2959 oap->oap_caller_data = data;
2961 oap->oap_page = page;
2962 oap->oap_obj_off = offset;
2963 if (!client_is_remote(exp) &&
2964 cfs_capable(CFS_CAP_SYS_RESOURCE))
2965 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2967 LASSERT(!(offset & ~CFS_PAGE_MASK));
2969 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2970 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2971 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2972 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2974 cfs_spin_lock_init(&oap->oap_lock);
2975 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2979 int osc_queue_async_io(const struct lu_env *env, struct obd_export *exp,
2980 struct lov_stripe_md *lsm, struct lov_oinfo *loi,
2981 struct osc_async_page *oap, int cmd, int off,
2982 int count, obd_flag brw_flags, enum async_flags async_flags)
2984 struct client_obd *cli = &exp->exp_obd->u.cli;
2988 if (oap->oap_magic != OAP_MAGIC)
2991 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2994 if (!cfs_list_empty(&oap->oap_pending_item) ||
2995 !cfs_list_empty(&oap->oap_urgent_item) ||
2996 !cfs_list_empty(&oap->oap_rpc_item))
2999 /* check if the file's owner/group is over quota */
3000 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
3001 struct cl_object *obj;
3002 struct cl_attr attr; /* XXX put attr into thread info */
3003 unsigned int qid[MAXQUOTAS];
3005 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
3007 cl_object_attr_lock(obj);
3008 rc = cl_object_attr_get(env, obj, &attr);
3009 cl_object_attr_unlock(obj);
3011 qid[USRQUOTA] = attr.cat_uid;
3012 qid[GRPQUOTA] = attr.cat_gid;
3014 lquota_chkdq(quota_interface, cli, qid) == NO_QUOTA)
3021 loi = lsm->lsm_oinfo[0];
3023 client_obd_list_lock(&cli->cl_loi_list_lock);
3025 LASSERT(off + count <= CFS_PAGE_SIZE);
3027 oap->oap_page_off = off;
3028 oap->oap_count = count;
3029 oap->oap_brw_flags = brw_flags;
3030 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
3031 if (cfs_memory_pressure_get())
3032 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
3033 cfs_spin_lock(&oap->oap_lock);
3034 oap->oap_async_flags = async_flags;
3035 cfs_spin_unlock(&oap->oap_lock);
3037 if (cmd & OBD_BRW_WRITE) {
3038 rc = osc_enter_cache(env, cli, loi, oap);
3040 client_obd_list_unlock(&cli->cl_loi_list_lock);
3045 osc_oap_to_pending(oap);
3046 loi_list_maint(cli, loi);
3048 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
3051 osc_check_rpcs(env, cli);
3052 client_obd_list_unlock(&cli->cl_loi_list_lock);
3057 /* aka (~was & now & flag), but this is more clear :) */
3058 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
3060 int osc_set_async_flags_base(struct client_obd *cli,
3061 struct lov_oinfo *loi, struct osc_async_page *oap,
3062 obd_flag async_flags)
3064 struct loi_oap_pages *lop;
3068 LASSERT(!cfs_list_empty(&oap->oap_pending_item));
3070 if (oap->oap_cmd & OBD_BRW_WRITE) {
3071 lop = &loi->loi_write_lop;
3073 lop = &loi->loi_read_lop;
3076 if ((oap->oap_async_flags & async_flags) == async_flags)
3079 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
3080 flags |= ASYNC_READY;
3082 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
3083 cfs_list_empty(&oap->oap_rpc_item)) {
3084 if (oap->oap_async_flags & ASYNC_HP)
3085 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
3087 cfs_list_add_tail(&oap->oap_urgent_item,
3089 flags |= ASYNC_URGENT;
3090 loi_list_maint(cli, loi);
3092 cfs_spin_lock(&oap->oap_lock);
3093 oap->oap_async_flags |= flags;
3094 cfs_spin_unlock(&oap->oap_lock);
3096 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
3097 oap->oap_async_flags);
3101 int osc_teardown_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
3102 struct lov_oinfo *loi, struct osc_async_page *oap)
3104 struct client_obd *cli = &exp->exp_obd->u.cli;
3105 struct loi_oap_pages *lop;
3109 if (oap->oap_magic != OAP_MAGIC)
3113 loi = lsm->lsm_oinfo[0];
3115 if (oap->oap_cmd & OBD_BRW_WRITE) {
3116 lop = &loi->loi_write_lop;
3118 lop = &loi->loi_read_lop;
3121 client_obd_list_lock(&cli->cl_loi_list_lock);
3123 if (!cfs_list_empty(&oap->oap_rpc_item))
3124 GOTO(out, rc = -EBUSY);
3126 osc_exit_cache(cli, oap, 0);
3127 osc_wake_cache_waiters(cli);
3129 if (!cfs_list_empty(&oap->oap_urgent_item)) {
3130 cfs_list_del_init(&oap->oap_urgent_item);
3131 cfs_spin_lock(&oap->oap_lock);
3132 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3133 cfs_spin_unlock(&oap->oap_lock);
3135 if (!cfs_list_empty(&oap->oap_pending_item)) {
3136 cfs_list_del_init(&oap->oap_pending_item);
3137 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3139 loi_list_maint(cli, loi);
3140 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3142 client_obd_list_unlock(&cli->cl_loi_list_lock);
3146 static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
3147 struct ldlm_enqueue_info *einfo)
3149 void *data = einfo->ei_cbdata;
3152 LASSERT(lock != NULL);
3153 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3154 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3155 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3156 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3158 lock_res_and_lock(lock);
3159 cfs_spin_lock(&osc_ast_guard);
3161 if (lock->l_ast_data == NULL)
3162 lock->l_ast_data = data;
3163 if (lock->l_ast_data == data)
3166 cfs_spin_unlock(&osc_ast_guard);
3167 unlock_res_and_lock(lock);
3172 static int osc_set_data_with_check(struct lustre_handle *lockh,
3173 struct ldlm_enqueue_info *einfo)
3175 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3179 set = osc_set_lock_data_with_check(lock, einfo);
3180 LDLM_LOCK_PUT(lock);
3182 CERROR("lockh %p, data %p - client evicted?\n",
3183 lockh, einfo->ei_cbdata);
3187 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3188 ldlm_iterator_t replace, void *data)
3190 struct ldlm_res_id res_id;
3191 struct obd_device *obd = class_exp2obd(exp);
3193 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3194 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3198 /* find any ldlm lock of the inode in osc
3202 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3203 ldlm_iterator_t replace, void *data)
3205 struct ldlm_res_id res_id;
3206 struct obd_device *obd = class_exp2obd(exp);
3209 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
3210 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3211 if (rc == LDLM_ITER_STOP)
3213 if (rc == LDLM_ITER_CONTINUE)
3218 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3219 obd_enqueue_update_f upcall, void *cookie,
3222 int intent = *flags & LDLM_FL_HAS_INTENT;
3226 /* The request was created before ldlm_cli_enqueue call. */
3227 if (rc == ELDLM_LOCK_ABORTED) {
3228 struct ldlm_reply *rep;
3229 rep = req_capsule_server_get(&req->rq_pill,
3232 LASSERT(rep != NULL);
3233 if (rep->lock_policy_res1)
3234 rc = rep->lock_policy_res1;
3238 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3239 *flags |= LDLM_FL_LVB_READY;
3240 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3241 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3244 /* Call the update callback. */
3245 rc = (*upcall)(cookie, rc);
3249 static int osc_enqueue_interpret(const struct lu_env *env,
3250 struct ptlrpc_request *req,
3251 struct osc_enqueue_args *aa, int rc)
3253 struct ldlm_lock *lock;
3254 struct lustre_handle handle;
3257 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3258 * might be freed anytime after lock upcall has been called. */
3259 lustre_handle_copy(&handle, aa->oa_lockh);
3260 mode = aa->oa_ei->ei_mode;
3262 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3264 lock = ldlm_handle2lock(&handle);
3266 /* Take an additional reference so that a blocking AST that
3267 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3268 * to arrive after an upcall has been executed by
3269 * osc_enqueue_fini(). */
3270 ldlm_lock_addref(&handle, mode);
3272 /* Let CP AST to grant the lock first. */
3273 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
3275 /* Complete obtaining the lock procedure. */
3276 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3277 mode, aa->oa_flags, aa->oa_lvb,
3278 sizeof(*aa->oa_lvb), &handle, rc);
3279 /* Complete osc stuff. */
3280 rc = osc_enqueue_fini(req, aa->oa_lvb,
3281 aa->oa_upcall, aa->oa_cookie, aa->oa_flags, rc);
3283 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3285 /* Release the lock for async request. */
3286 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3288 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3289 * not already released by
3290 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3292 ldlm_lock_decref(&handle, mode);
3294 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3295 aa->oa_lockh, req, aa);
3296 ldlm_lock_decref(&handle, mode);
3297 LDLM_LOCK_PUT(lock);
3301 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3302 struct lov_oinfo *loi, int flags,
3303 struct ost_lvb *lvb, __u32 mode, int rc)
3305 if (rc == ELDLM_OK) {
3306 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3309 LASSERT(lock != NULL);
3310 loi->loi_lvb = *lvb;
3311 tmp = loi->loi_lvb.lvb_size;
3312 /* Extend KMS up to the end of this lock and no further
3313 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3314 if (tmp > lock->l_policy_data.l_extent.end)
3315 tmp = lock->l_policy_data.l_extent.end + 1;
3316 if (tmp >= loi->loi_kms) {
3317 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3318 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3319 loi_kms_set(loi, tmp);
3321 LDLM_DEBUG(lock, "lock acquired, setting rss="
3322 LPU64"; leaving kms="LPU64", end="LPU64,
3323 loi->loi_lvb.lvb_size, loi->loi_kms,
3324 lock->l_policy_data.l_extent.end);
3326 ldlm_lock_allow_match(lock);
3327 LDLM_LOCK_PUT(lock);
3328 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3329 loi->loi_lvb = *lvb;
3330 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3331 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3335 EXPORT_SYMBOL(osc_update_enqueue);
3337 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3339 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3340 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3341 * other synchronous requests, however keeping some locks and trying to obtain
3342 * others may take a considerable amount of time in a case of ost failure; and
3343 * when other sync requests do not get released lock from a client, the client
3344 * is excluded from the cluster -- such scenarious make the life difficult, so
3345 * release locks just after they are obtained. */
3346 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3347 int *flags, ldlm_policy_data_t *policy,
3348 struct ost_lvb *lvb, int kms_valid,
3349 obd_enqueue_update_f upcall, void *cookie,
3350 struct ldlm_enqueue_info *einfo,
3351 struct lustre_handle *lockh,
3352 struct ptlrpc_request_set *rqset, int async)
3354 struct obd_device *obd = exp->exp_obd;
3355 struct ptlrpc_request *req = NULL;
3356 int intent = *flags & LDLM_FL_HAS_INTENT;
3361 /* Filesystem lock extents are extended to page boundaries so that
3362 * dealing with the page cache is a little smoother. */
3363 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3364 policy->l_extent.end |= ~CFS_PAGE_MASK;
3367 * kms is not valid when either object is completely fresh (so that no
3368 * locks are cached), or object was evicted. In the latter case cached
3369 * lock cannot be used, because it would prime inode state with
3370 * potentially stale LVB.
3375 /* Next, search for already existing extent locks that will cover us */
3376 /* If we're trying to read, we also search for an existing PW lock. The
3377 * VFS and page cache already protect us locally, so lots of readers/
3378 * writers can share a single PW lock.
3380 * There are problems with conversion deadlocks, so instead of
3381 * converting a read lock to a write lock, we'll just enqueue a new
3384 * At some point we should cancel the read lock instead of making them
3385 * send us a blocking callback, but there are problems with canceling
3386 * locks out from other users right now, too. */
3387 mode = einfo->ei_mode;
3388 if (einfo->ei_mode == LCK_PR)
3390 mode = ldlm_lock_match(obd->obd_namespace,
3391 *flags | LDLM_FL_LVB_READY, res_id,
3392 einfo->ei_type, policy, mode, lockh, 0);
3394 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3396 if (osc_set_lock_data_with_check(matched, einfo)) {
3397 /* addref the lock only if not async requests and PW
3398 * lock is matched whereas we asked for PR. */
3399 if (!rqset && einfo->ei_mode != mode)
3400 ldlm_lock_addref(lockh, LCK_PR);
3402 /* I would like to be able to ASSERT here that
3403 * rss <= kms, but I can't, for reasons which
3404 * are explained in lov_enqueue() */
3407 /* We already have a lock, and it's referenced */
3408 (*upcall)(cookie, ELDLM_OK);
3410 /* For async requests, decref the lock. */
3411 if (einfo->ei_mode != mode)
3412 ldlm_lock_decref(lockh, LCK_PW);
3414 ldlm_lock_decref(lockh, einfo->ei_mode);
3415 LDLM_LOCK_PUT(matched);
3418 ldlm_lock_decref(lockh, mode);
3419 LDLM_LOCK_PUT(matched);
3424 CFS_LIST_HEAD(cancels);
3425 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3426 &RQF_LDLM_ENQUEUE_LVB);
3430 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3432 ptlrpc_request_free(req);
3436 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3438 ptlrpc_request_set_replen(req);
3441 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3442 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3444 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3445 sizeof(*lvb), lockh, async);
3448 struct osc_enqueue_args *aa;
3449 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3450 aa = ptlrpc_req_async_args(req);
3453 aa->oa_flags = flags;
3454 aa->oa_upcall = upcall;
3455 aa->oa_cookie = cookie;
3457 aa->oa_lockh = lockh;
3459 req->rq_interpret_reply =
3460 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3461 if (rqset == PTLRPCD_SET)
3462 ptlrpcd_add_req(req, PSCOPE_OTHER);
3464 ptlrpc_set_add_req(rqset, req);
3465 } else if (intent) {
3466 ptlrpc_req_finished(req);
3471 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, rc);
3473 ptlrpc_req_finished(req);
3478 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3479 struct ldlm_enqueue_info *einfo,
3480 struct ptlrpc_request_set *rqset)
3482 struct ldlm_res_id res_id;
3486 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3487 oinfo->oi_md->lsm_object_seq, &res_id);
3489 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3490 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3491 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3492 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3493 rqset, rqset != NULL);
3497 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3498 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3499 int *flags, void *data, struct lustre_handle *lockh,
3502 struct obd_device *obd = exp->exp_obd;
3503 int lflags = *flags;
3507 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3510 /* Filesystem lock extents are extended to page boundaries so that
3511 * dealing with the page cache is a little smoother */
3512 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3513 policy->l_extent.end |= ~CFS_PAGE_MASK;
3515 /* Next, search for already existing extent locks that will cover us */
3516 /* If we're trying to read, we also search for an existing PW lock. The
3517 * VFS and page cache already protect us locally, so lots of readers/
3518 * writers can share a single PW lock. */
3522 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3523 res_id, type, policy, rc, lockh, unref);
3526 if (!osc_set_data_with_check(lockh, data)) {
3527 if (!(lflags & LDLM_FL_TEST_LOCK))
3528 ldlm_lock_decref(lockh, rc);
3532 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3533 ldlm_lock_addref(lockh, LCK_PR);
3534 ldlm_lock_decref(lockh, LCK_PW);
3541 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3545 if (unlikely(mode == LCK_GROUP))
3546 ldlm_lock_decref_and_cancel(lockh, mode);
3548 ldlm_lock_decref(lockh, mode);
3553 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3554 __u32 mode, struct lustre_handle *lockh)
3557 RETURN(osc_cancel_base(lockh, mode));
3560 static int osc_cancel_unused(struct obd_export *exp,
3561 struct lov_stripe_md *lsm,
3562 ldlm_cancel_flags_t flags,
3565 struct obd_device *obd = class_exp2obd(exp);
3566 struct ldlm_res_id res_id, *resp = NULL;
3569 resp = osc_build_res_name(lsm->lsm_object_id,
3570 lsm->lsm_object_seq, &res_id);
3573 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3576 static int osc_statfs_interpret(const struct lu_env *env,
3577 struct ptlrpc_request *req,
3578 struct osc_async_args *aa, int rc)
3580 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3581 struct obd_statfs *msfs;
3586 /* The request has in fact never been sent
3587 * due to issues at a higher level (LOV).
3588 * Exit immediately since the caller is
3589 * aware of the problem and takes care
3590 * of the clean up */
3593 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3594 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3600 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3602 GOTO(out, rc = -EPROTO);
3605 /* Reinitialize the RDONLY and DEGRADED flags at the client
3606 * on each statfs, so they don't stay set permanently. */
3607 cfs_spin_lock(&cli->cl_oscc.oscc_lock);
3609 if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
3610 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3611 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
3612 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
3614 if (unlikely(msfs->os_state & OS_STATE_READONLY))
3615 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3616 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
3617 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
3619 /* Add a bit of hysteresis so this flag isn't continually flapping,
3620 * and ensure that new files don't get extremely fragmented due to
3621 * only a small amount of available space in the filesystem.
3622 * We want to set the NOSPC flag when there is less than ~0.1% free
3623 * and clear it when there is at least ~0.2% free space, so:
3624 * avail < ~0.1% max max = avail + used
3625 * 1025 * avail < avail + used used = blocks - free
3626 * 1024 * avail < used
3627 * 1024 * avail < blocks - free
3628 * avail < ((blocks - free) >> 10)
3630 * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
3631 * lose that amount of space so in those cases we report no space left
3632 * if their is less than 1 GB left. */
3633 used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
3634 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
3635 ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
3636 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
3637 else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3638 (msfs->os_ffree > 64) && (msfs->os_bavail > (used << 1))))
3639 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_NOSPC;
3641 cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
3643 *aa->aa_oi->oi_osfs = *msfs;
3645 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3649 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3650 __u64 max_age, struct ptlrpc_request_set *rqset)
3652 struct ptlrpc_request *req;
3653 struct osc_async_args *aa;
3657 /* We could possibly pass max_age in the request (as an absolute
3658 * timestamp or a "seconds.usec ago") so the target can avoid doing
3659 * extra calls into the filesystem if that isn't necessary (e.g.
3660 * during mount that would help a bit). Having relative timestamps
3661 * is not so great if request processing is slow, while absolute
3662 * timestamps are not ideal because they need time synchronization. */
3663 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3667 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3669 ptlrpc_request_free(req);
3672 ptlrpc_request_set_replen(req);
3673 req->rq_request_portal = OST_CREATE_PORTAL;
3674 ptlrpc_at_set_req_timeout(req);
3676 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3677 /* procfs requests not want stat in wait for avoid deadlock */
3678 req->rq_no_resend = 1;
3679 req->rq_no_delay = 1;
3682 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3683 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3684 aa = ptlrpc_req_async_args(req);
3687 ptlrpc_set_add_req(rqset, req);
3691 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3692 __u64 max_age, __u32 flags)
3694 struct obd_statfs *msfs;
3695 struct ptlrpc_request *req;
3696 struct obd_import *imp = NULL;
3700 /*Since the request might also come from lprocfs, so we need
3701 *sync this with client_disconnect_export Bug15684*/
3702 cfs_down_read(&obd->u.cli.cl_sem);
3703 if (obd->u.cli.cl_import)
3704 imp = class_import_get(obd->u.cli.cl_import);
3705 cfs_up_read(&obd->u.cli.cl_sem);
3709 /* We could possibly pass max_age in the request (as an absolute
3710 * timestamp or a "seconds.usec ago") so the target can avoid doing
3711 * extra calls into the filesystem if that isn't necessary (e.g.
3712 * during mount that would help a bit). Having relative timestamps
3713 * is not so great if request processing is slow, while absolute
3714 * timestamps are not ideal because they need time synchronization. */
3715 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3717 class_import_put(imp);
3722 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3724 ptlrpc_request_free(req);
3727 ptlrpc_request_set_replen(req);
3728 req->rq_request_portal = OST_CREATE_PORTAL;
3729 ptlrpc_at_set_req_timeout(req);
3731 if (flags & OBD_STATFS_NODELAY) {
3732 /* procfs requests not want stat in wait for avoid deadlock */
3733 req->rq_no_resend = 1;
3734 req->rq_no_delay = 1;
3737 rc = ptlrpc_queue_wait(req);
3741 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3743 GOTO(out, rc = -EPROTO);
3750 ptlrpc_req_finished(req);
3754 /* Retrieve object striping information.
3756 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3757 * the maximum number of OST indices which will fit in the user buffer.
3758 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3760 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3762 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3763 struct lov_user_md_v3 lum, *lumk;
3764 struct lov_user_ost_data_v1 *lmm_objects;
3765 int rc = 0, lum_size;
3771 /* we only need the header part from user space to get lmm_magic and
3772 * lmm_stripe_count, (the header part is common to v1 and v3) */
3773 lum_size = sizeof(struct lov_user_md_v1);
3774 if (cfs_copy_from_user(&lum, lump, lum_size))
3777 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3778 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3781 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3782 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3783 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3784 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3786 /* we can use lov_mds_md_size() to compute lum_size
3787 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3788 if (lum.lmm_stripe_count > 0) {
3789 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3790 OBD_ALLOC(lumk, lum_size);
3794 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3795 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3797 lmm_objects = &(lumk->lmm_objects[0]);
3798 lmm_objects->l_object_id = lsm->lsm_object_id;
3800 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3804 lumk->lmm_object_id = lsm->lsm_object_id;
3805 lumk->lmm_object_seq = lsm->lsm_object_seq;
3806 lumk->lmm_stripe_count = 1;
3808 if (cfs_copy_to_user(lump, lumk, lum_size))
3812 OBD_FREE(lumk, lum_size);
3818 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3819 void *karg, void *uarg)
3821 struct obd_device *obd = exp->exp_obd;
3822 struct obd_ioctl_data *data = karg;
3826 if (!cfs_try_module_get(THIS_MODULE)) {
3827 CERROR("Can't get module. Is it alive?");
3831 case OBD_IOC_LOV_GET_CONFIG: {
3833 struct lov_desc *desc;
3834 struct obd_uuid uuid;
3838 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3839 GOTO(out, err = -EINVAL);
3841 data = (struct obd_ioctl_data *)buf;
3843 if (sizeof(*desc) > data->ioc_inllen1) {
3844 obd_ioctl_freedata(buf, len);
3845 GOTO(out, err = -EINVAL);
3848 if (data->ioc_inllen2 < sizeof(uuid)) {
3849 obd_ioctl_freedata(buf, len);
3850 GOTO(out, err = -EINVAL);
3853 desc = (struct lov_desc *)data->ioc_inlbuf1;
3854 desc->ld_tgt_count = 1;
3855 desc->ld_active_tgt_count = 1;
3856 desc->ld_default_stripe_count = 1;
3857 desc->ld_default_stripe_size = 0;
3858 desc->ld_default_stripe_offset = 0;
3859 desc->ld_pattern = 0;
3860 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3862 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3864 err = cfs_copy_to_user((void *)uarg, buf, len);
3867 obd_ioctl_freedata(buf, len);
3870 case LL_IOC_LOV_SETSTRIPE:
3871 err = obd_alloc_memmd(exp, karg);
3875 case LL_IOC_LOV_GETSTRIPE:
3876 err = osc_getstripe(karg, uarg);
3878 case OBD_IOC_CLIENT_RECOVER:
3879 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3884 case IOC_OSC_SET_ACTIVE:
3885 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3888 case OBD_IOC_POLL_QUOTACHECK:
3889 err = lquota_poll_check(quota_interface, exp,
3890 (struct if_quotacheck *)karg);
3892 case OBD_IOC_PING_TARGET:
3893 err = ptlrpc_obd_ping(obd);
3896 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3897 cmd, cfs_curproc_comm());
3898 GOTO(out, err = -ENOTTY);
3901 cfs_module_put(THIS_MODULE);
3905 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3906 void *key, __u32 *vallen, void *val,
3907 struct lov_stripe_md *lsm)
3910 if (!vallen || !val)
3913 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3914 __u32 *stripe = val;
3915 *vallen = sizeof(*stripe);
3918 } else if (KEY_IS(KEY_LAST_ID)) {
3919 struct ptlrpc_request *req;
3924 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3925 &RQF_OST_GET_INFO_LAST_ID);
3929 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3930 RCL_CLIENT, keylen);
3931 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3933 ptlrpc_request_free(req);
3937 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3938 memcpy(tmp, key, keylen);
3940 req->rq_no_delay = req->rq_no_resend = 1;
3941 ptlrpc_request_set_replen(req);
3942 rc = ptlrpc_queue_wait(req);
3946 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3948 GOTO(out, rc = -EPROTO);
3950 *((obd_id *)val) = *reply;
3952 ptlrpc_req_finished(req);
3954 } else if (KEY_IS(KEY_FIEMAP)) {
3955 struct ptlrpc_request *req;
3956 struct ll_user_fiemap *reply;
3960 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3961 &RQF_OST_GET_INFO_FIEMAP);
3965 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3966 RCL_CLIENT, keylen);
3967 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3968 RCL_CLIENT, *vallen);
3969 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3970 RCL_SERVER, *vallen);
3972 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3974 ptlrpc_request_free(req);
3978 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3979 memcpy(tmp, key, keylen);
3980 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3981 memcpy(tmp, val, *vallen);
3983 ptlrpc_request_set_replen(req);
3984 rc = ptlrpc_queue_wait(req);
3988 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3990 GOTO(out1, rc = -EPROTO);
3992 memcpy(val, reply, *vallen);
3994 ptlrpc_req_finished(req);
4002 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
4004 struct llog_ctxt *ctxt;
4008 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
4010 rc = llog_initiator_connect(ctxt);
4011 llog_ctxt_put(ctxt);
4013 /* XXX return an error? skip setting below flags? */
4016 cfs_spin_lock(&imp->imp_lock);
4017 imp->imp_server_timeout = 1;
4018 imp->imp_pingable = 1;
4019 cfs_spin_unlock(&imp->imp_lock);
4020 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
4025 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
4026 struct ptlrpc_request *req,
4033 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
4036 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
4037 void *key, obd_count vallen, void *val,
4038 struct ptlrpc_request_set *set)
4040 struct ptlrpc_request *req;
4041 struct obd_device *obd = exp->exp_obd;
4042 struct obd_import *imp = class_exp2cliimp(exp);
4047 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
4049 if (KEY_IS(KEY_NEXT_ID)) {
4051 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4053 if (vallen != sizeof(obd_id))
4058 if (vallen != sizeof(obd_id))
4061 /* avoid race between allocate new object and set next id
4062 * from ll_sync thread */
4063 cfs_spin_lock(&oscc->oscc_lock);
4064 new_val = *((obd_id*)val) + 1;
4065 if (new_val > oscc->oscc_next_id)
4066 oscc->oscc_next_id = new_val;
4067 cfs_spin_unlock(&oscc->oscc_lock);
4068 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
4069 exp->exp_obd->obd_name,
4070 obd->u.cli.cl_oscc.oscc_next_id);
4075 if (KEY_IS(KEY_CHECKSUM)) {
4076 if (vallen != sizeof(int))
4078 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
4082 if (KEY_IS(KEY_SPTLRPC_CONF)) {
4083 sptlrpc_conf_client_adapt(obd);
4087 if (KEY_IS(KEY_FLUSH_CTX)) {
4088 sptlrpc_import_flush_my_ctx(imp);
4092 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
4095 /* We pass all other commands directly to OST. Since nobody calls osc
4096 methods directly and everybody is supposed to go through LOV, we
4097 assume lov checked invalid values for us.
4098 The only recognised values so far are evict_by_nid and mds_conn.
4099 Even if something bad goes through, we'd get a -EINVAL from OST
4102 if (KEY_IS(KEY_GRANT_SHRINK))
4103 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
4105 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
4110 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
4111 RCL_CLIENT, keylen);
4112 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
4113 RCL_CLIENT, vallen);
4114 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
4116 ptlrpc_request_free(req);
4120 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
4121 memcpy(tmp, key, keylen);
4122 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
4123 memcpy(tmp, val, vallen);
4125 if (KEY_IS(KEY_MDS_CONN)) {
4126 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4128 oscc->oscc_oa.o_seq = (*(__u32 *)val);
4129 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
4130 LASSERT_SEQ_IS_MDT(oscc->oscc_oa.o_seq);
4131 req->rq_no_delay = req->rq_no_resend = 1;
4132 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
4133 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
4134 struct osc_grant_args *aa;
4137 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
4138 aa = ptlrpc_req_async_args(req);
4141 ptlrpc_req_finished(req);
4144 *oa = ((struct ost_body *)val)->oa;
4146 req->rq_interpret_reply = osc_shrink_grant_interpret;
4149 ptlrpc_request_set_replen(req);
4150 if (!KEY_IS(KEY_GRANT_SHRINK)) {
4151 LASSERT(set != NULL);
4152 ptlrpc_set_add_req(set, req);
4153 ptlrpc_check_set(NULL, set);
4155 ptlrpcd_add_req(req, PSCOPE_OTHER);
4161 static struct llog_operations osc_size_repl_logops = {
4162 lop_cancel: llog_obd_repl_cancel
4165 static struct llog_operations osc_mds_ost_orig_logops;
4167 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4168 struct obd_device *tgt, struct llog_catid *catid)
4173 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4174 &catid->lci_logid, &osc_mds_ost_orig_logops);
4176 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4180 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4181 NULL, &osc_size_repl_logops);
4183 struct llog_ctxt *ctxt =
4184 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4187 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4192 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4193 obd->obd_name, tgt->obd_name, catid, rc);
4194 CERROR("logid "LPX64":0x%x\n",
4195 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4200 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4201 struct obd_device *disk_obd, int *index)
4203 struct llog_catid catid;
4204 static char name[32] = CATLIST;
4208 LASSERT(olg == &obd->obd_olg);
4210 cfs_mutex_down(&olg->olg_cat_processing);
4211 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4213 CERROR("rc: %d\n", rc);
4217 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4218 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4219 catid.lci_logid.lgl_oseq, catid.lci_logid.lgl_ogen);
4221 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4223 CERROR("rc: %d\n", rc);
4227 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4229 CERROR("rc: %d\n", rc);
4234 cfs_mutex_up(&olg->olg_cat_processing);
4239 static int osc_llog_finish(struct obd_device *obd, int count)
4241 struct llog_ctxt *ctxt;
4242 int rc = 0, rc2 = 0;
4245 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4247 rc = llog_cleanup(ctxt);
4249 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4251 rc2 = llog_cleanup(ctxt);
4258 static int osc_reconnect(const struct lu_env *env,
4259 struct obd_export *exp, struct obd_device *obd,
4260 struct obd_uuid *cluuid,
4261 struct obd_connect_data *data,
4264 struct client_obd *cli = &obd->u.cli;
4266 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4269 client_obd_list_lock(&cli->cl_loi_list_lock);
4270 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
4271 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4272 lost_grant = cli->cl_lost_grant;
4273 cli->cl_lost_grant = 0;
4274 client_obd_list_unlock(&cli->cl_loi_list_lock);
4276 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4277 "cl_dirty: %ld cl_lost_grant: %ld\n", data->ocd_grant,
4278 cli->cl_avail_grant, cli->cl_dirty, lost_grant);
4279 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4280 " ocd_grant: %d\n", data->ocd_connect_flags,
4281 data->ocd_version, data->ocd_grant);
4287 static int osc_disconnect(struct obd_export *exp)
4289 struct obd_device *obd = class_exp2obd(exp);
4290 struct llog_ctxt *ctxt;
4293 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4295 if (obd->u.cli.cl_conn_count == 1) {
4296 /* Flush any remaining cancel messages out to the
4298 llog_sync(ctxt, exp);
4300 llog_ctxt_put(ctxt);
4302 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4306 rc = client_disconnect_export(exp);
4308 * Initially we put del_shrink_grant before disconnect_export, but it
4309 * causes the following problem if setup (connect) and cleanup
4310 * (disconnect) are tangled together.
4311 * connect p1 disconnect p2
4312 * ptlrpc_connect_import
4313 * ............... class_manual_cleanup
4316 * ptlrpc_connect_interrupt
4318 * add this client to shrink list
4320 * Bang! pinger trigger the shrink.
4321 * So the osc should be disconnected from the shrink list, after we
4322 * are sure the import has been destroyed. BUG18662
4324 if (obd->u.cli.cl_import == NULL)
4325 osc_del_shrink_grant(&obd->u.cli);
4329 static int osc_import_event(struct obd_device *obd,
4330 struct obd_import *imp,
4331 enum obd_import_event event)
4333 struct client_obd *cli;
4337 LASSERT(imp->imp_obd == obd);
4340 case IMP_EVENT_DISCON: {
4341 /* Only do this on the MDS OSC's */
4342 if (imp->imp_server_timeout) {
4343 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4345 cfs_spin_lock(&oscc->oscc_lock);
4346 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4347 cfs_spin_unlock(&oscc->oscc_lock);
4350 client_obd_list_lock(&cli->cl_loi_list_lock);
4351 cli->cl_avail_grant = 0;
4352 cli->cl_lost_grant = 0;
4353 client_obd_list_unlock(&cli->cl_loi_list_lock);
4356 case IMP_EVENT_INACTIVE: {
4357 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4360 case IMP_EVENT_INVALIDATE: {
4361 struct ldlm_namespace *ns = obd->obd_namespace;
4365 env = cl_env_get(&refcheck);
4369 client_obd_list_lock(&cli->cl_loi_list_lock);
4370 /* all pages go to failing rpcs due to the invalid
4372 osc_check_rpcs(env, cli);
4373 client_obd_list_unlock(&cli->cl_loi_list_lock);
4375 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4376 cl_env_put(env, &refcheck);
4381 case IMP_EVENT_ACTIVE: {
4382 /* Only do this on the MDS OSC's */
4383 if (imp->imp_server_timeout) {
4384 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4386 cfs_spin_lock(&oscc->oscc_lock);
4387 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
4388 cfs_spin_unlock(&oscc->oscc_lock);
4390 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4393 case IMP_EVENT_OCD: {
4394 struct obd_connect_data *ocd = &imp->imp_connect_data;
4396 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4397 osc_init_grant(&obd->u.cli, ocd);
4400 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4401 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4403 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4406 case IMP_EVENT_DEACTIVATE: {
4407 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
4410 case IMP_EVENT_ACTIVATE: {
4411 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
4415 CERROR("Unknown import event %d\n", event);
4422 * Determine whether the lock can be canceled before replaying the lock
4423 * during recovery, see bug16774 for detailed information.
4425 * \retval zero the lock can't be canceled
4426 * \retval other ok to cancel
4428 static int osc_cancel_for_recovery(struct ldlm_lock *lock)
4430 check_res_locked(lock->l_resource);
4433 * Cancel all unused extent lock in granted mode LCK_PR or LCK_CR.
4435 * XXX as a future improvement, we can also cancel unused write lock
4436 * if it doesn't have dirty data and active mmaps.
4438 if (lock->l_resource->lr_type == LDLM_EXTENT &&
4439 (lock->l_granted_mode == LCK_PR ||
4440 lock->l_granted_mode == LCK_CR) &&
4441 (osc_dlm_lock_pageref(lock) == 0))
4447 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4453 rc = ptlrpcd_addref();
4457 rc = client_obd_setup(obd, lcfg);
4461 struct lprocfs_static_vars lvars = { 0 };
4462 struct client_obd *cli = &obd->u.cli;
4464 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4465 lprocfs_osc_init_vars(&lvars);
4466 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4467 lproc_osc_attach_seqstat(obd);
4468 sptlrpc_lprocfs_cliobd_attach(obd);
4469 ptlrpc_lprocfs_register_obd(obd);
4473 /* We need to allocate a few requests more, because
4474 brw_interpret tries to create new requests before freeing
4475 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4476 reserved, but I afraid that might be too much wasted RAM
4477 in fact, so 2 is just my guess and still should work. */
4478 cli->cl_import->imp_rq_pool =
4479 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4481 ptlrpc_add_rqs_to_pool);
4483 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4484 cfs_sema_init(&cli->cl_grant_sem, 1);
4486 ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
4492 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4498 case OBD_CLEANUP_EARLY: {
4499 struct obd_import *imp;
4500 imp = obd->u.cli.cl_import;
4501 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4502 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4503 ptlrpc_deactivate_import(imp);
4504 cfs_spin_lock(&imp->imp_lock);
4505 imp->imp_pingable = 0;
4506 cfs_spin_unlock(&imp->imp_lock);
4509 case OBD_CLEANUP_EXPORTS: {
4511 * for echo client, export may be on zombie list, wait for
4512 * zombie thread to cull it, because cli.cl_import will be
4513 * cleared in client_disconnect_export():
4514 * class_export_destroy() -> obd_cleanup() ->
4515 * echo_device_free() -> echo_client_cleanup() ->
4516 * obd_disconnect() -> osc_disconnect() ->
4517 * client_disconnect_export()
4519 obd_zombie_barrier();
4520 /* If we set up but never connected, the
4521 client import will not have been cleaned. */
4522 if (obd->u.cli.cl_import) {
4523 struct obd_import *imp;
4524 cfs_down_write(&obd->u.cli.cl_sem);
4525 imp = obd->u.cli.cl_import;
4526 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4528 ptlrpc_invalidate_import(imp);
4529 if (imp->imp_rq_pool) {
4530 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4531 imp->imp_rq_pool = NULL;
4533 class_destroy_import(imp);
4534 cfs_up_write(&obd->u.cli.cl_sem);
4535 obd->u.cli.cl_import = NULL;
4537 rc = obd_llog_finish(obd, 0);
4539 CERROR("failed to cleanup llogging subsystems\n");
4546 int osc_cleanup(struct obd_device *obd)
4551 ptlrpc_lprocfs_unregister_obd(obd);
4552 lprocfs_obd_cleanup(obd);
4554 /* free memory of osc quota cache */
4555 lquota_cleanup(quota_interface, obd);
4557 rc = client_obd_cleanup(obd);
4563 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4565 struct lprocfs_static_vars lvars = { 0 };
4568 lprocfs_osc_init_vars(&lvars);
4570 switch (lcfg->lcfg_command) {
4572 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4582 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4584 return osc_process_config_base(obd, buf);
4587 struct obd_ops osc_obd_ops = {
4588 .o_owner = THIS_MODULE,
4589 .o_setup = osc_setup,
4590 .o_precleanup = osc_precleanup,
4591 .o_cleanup = osc_cleanup,
4592 .o_add_conn = client_import_add_conn,
4593 .o_del_conn = client_import_del_conn,
4594 .o_connect = client_connect_import,
4595 .o_reconnect = osc_reconnect,
4596 .o_disconnect = osc_disconnect,
4597 .o_statfs = osc_statfs,
4598 .o_statfs_async = osc_statfs_async,
4599 .o_packmd = osc_packmd,
4600 .o_unpackmd = osc_unpackmd,
4601 .o_precreate = osc_precreate,
4602 .o_create = osc_create,
4603 .o_create_async = osc_create_async,
4604 .o_destroy = osc_destroy,
4605 .o_getattr = osc_getattr,
4606 .o_getattr_async = osc_getattr_async,
4607 .o_setattr = osc_setattr,
4608 .o_setattr_async = osc_setattr_async,
4610 .o_punch = osc_punch,
4612 .o_enqueue = osc_enqueue,
4613 .o_change_cbdata = osc_change_cbdata,
4614 .o_find_cbdata = osc_find_cbdata,
4615 .o_cancel = osc_cancel,
4616 .o_cancel_unused = osc_cancel_unused,
4617 .o_iocontrol = osc_iocontrol,
4618 .o_get_info = osc_get_info,
4619 .o_set_info_async = osc_set_info_async,
4620 .o_import_event = osc_import_event,
4621 .o_llog_init = osc_llog_init,
4622 .o_llog_finish = osc_llog_finish,
4623 .o_process_config = osc_process_config,
4626 extern struct lu_kmem_descr osc_caches[];
4627 extern cfs_spinlock_t osc_ast_guard;
4628 extern cfs_lock_class_key_t osc_ast_guard_class;
4630 int __init osc_init(void)
4632 struct lprocfs_static_vars lvars = { 0 };
4636 /* print an address of _any_ initialized kernel symbol from this
4637 * module, to allow debugging with gdb that doesn't support data
4638 * symbols from modules.*/
4639 CDEBUG(D_CONSOLE, "Lustre OSC module (%p).\n", &osc_caches);
4641 rc = lu_kmem_init(osc_caches);
4643 lprocfs_osc_init_vars(&lvars);
4645 cfs_request_module("lquota");
4646 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4647 lquota_init(quota_interface);
4648 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4650 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4651 LUSTRE_OSC_NAME, &osc_device_type);
4653 if (quota_interface)
4654 PORTAL_SYMBOL_PUT(osc_quota_interface);
4655 lu_kmem_fini(osc_caches);
4659 cfs_spin_lock_init(&osc_ast_guard);
4660 cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4662 osc_mds_ost_orig_logops = llog_lvfs_ops;
4663 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4664 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4665 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4666 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4672 static void /*__exit*/ osc_exit(void)
4674 lu_device_type_fini(&osc_device_type);
4676 lquota_exit(quota_interface);
4677 if (quota_interface)
4678 PORTAL_SYMBOL_PUT(osc_quota_interface);
4680 class_unregister_type(LUSTRE_OSC_NAME);
4681 lu_kmem_fini(osc_caches);
4684 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4685 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4686 MODULE_LICENSE("GPL");
4688 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);