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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_OSC
42 #include <libcfs/libcfs.h>
45 # include <liblustre.h>
48 #include <lustre_dlm.h>
49 #include <lustre_net.h>
50 #include <lustre/lustre_user.h>
51 #include <obd_cksum.h>
59 #include <lustre_ha.h>
60 #include <lprocfs_status.h>
61 #include <lustre_log.h>
62 #include <lustre_debug.h>
63 #include <lustre_param.h>
64 #include "osc_internal.h"
66 static quota_interface_t *quota_interface = NULL;
67 extern quota_interface_t osc_quota_interface;
69 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
70 static int brw_interpret(const struct lu_env *env,
71 struct ptlrpc_request *req, void *data, int rc);
72 int osc_cleanup(struct obd_device *obd);
74 /* Pack OSC object metadata for disk storage (LE byte order). */
75 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
76 struct lov_stripe_md *lsm)
81 lmm_size = sizeof(**lmmp);
86 OBD_FREE(*lmmp, lmm_size);
92 OBD_ALLOC(*lmmp, lmm_size);
98 LASSERT(lsm->lsm_object_id);
99 LASSERT_MDS_GROUP(lsm->lsm_object_gr);
100 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
101 (*lmmp)->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
107 /* Unpack OSC object metadata from disk storage (LE byte order). */
108 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
109 struct lov_mds_md *lmm, int lmm_bytes)
115 if (lmm_bytes < sizeof (*lmm)) {
116 CERROR("lov_mds_md too small: %d, need %d\n",
117 lmm_bytes, (int)sizeof(*lmm));
120 /* XXX LOV_MAGIC etc check? */
122 if (lmm->lmm_object_id == 0) {
123 CERROR("lov_mds_md: zero lmm_object_id\n");
128 lsm_size = lov_stripe_md_size(1);
132 if (*lsmp != NULL && lmm == NULL) {
133 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
134 OBD_FREE(*lsmp, lsm_size);
140 OBD_ALLOC(*lsmp, lsm_size);
143 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
144 if ((*lsmp)->lsm_oinfo[0] == NULL) {
145 OBD_FREE(*lsmp, lsm_size);
148 loi_init((*lsmp)->lsm_oinfo[0]);
152 /* XXX zero *lsmp? */
153 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
154 (*lsmp)->lsm_object_gr = le64_to_cpu (lmm->lmm_object_gr);
155 LASSERT((*lsmp)->lsm_object_id);
156 LASSERT_MDS_GROUP((*lsmp)->lsm_object_gr);
159 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
164 static inline void osc_pack_capa(struct ptlrpc_request *req,
165 struct ost_body *body, void *capa)
167 struct obd_capa *oc = (struct obd_capa *)capa;
168 struct lustre_capa *c;
173 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
176 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
177 DEBUG_CAPA(D_SEC, c, "pack");
180 static inline void osc_pack_req_body(struct ptlrpc_request *req,
181 struct obd_info *oinfo)
183 struct ost_body *body;
185 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
188 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
189 osc_pack_capa(req, body, oinfo->oi_capa);
192 static inline void osc_set_capa_size(struct ptlrpc_request *req,
193 const struct req_msg_field *field,
197 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
199 /* it is already calculated as sizeof struct obd_capa */
203 static int osc_getattr_interpret(const struct lu_env *env,
204 struct ptlrpc_request *req,
205 struct osc_async_args *aa, int rc)
207 struct ost_body *body;
213 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
215 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
216 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
218 /* This should really be sent by the OST */
219 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
220 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
222 CDEBUG(D_INFO, "can't unpack ost_body\n");
224 aa->aa_oi->oi_oa->o_valid = 0;
227 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
231 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
232 struct ptlrpc_request_set *set)
234 struct ptlrpc_request *req;
235 struct osc_async_args *aa;
239 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
243 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
244 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
246 ptlrpc_request_free(req);
250 osc_pack_req_body(req, oinfo);
252 ptlrpc_request_set_replen(req);
253 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
255 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
256 aa = ptlrpc_req_async_args(req);
259 ptlrpc_set_add_req(set, req);
263 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
265 struct ptlrpc_request *req;
266 struct ost_body *body;
270 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
274 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
275 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
277 ptlrpc_request_free(req);
281 osc_pack_req_body(req, oinfo);
283 ptlrpc_request_set_replen(req);
285 rc = ptlrpc_queue_wait(req);
289 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
291 GOTO(out, rc = -EPROTO);
293 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
294 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
296 /* This should really be sent by the OST */
297 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
298 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
302 ptlrpc_req_finished(req);
306 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
307 struct obd_trans_info *oti)
309 struct ptlrpc_request *req;
310 struct ost_body *body;
314 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
316 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
320 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
321 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
323 ptlrpc_request_free(req);
327 osc_pack_req_body(req, oinfo);
329 ptlrpc_request_set_replen(req);
331 rc = ptlrpc_queue_wait(req);
335 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
337 GOTO(out, rc = -EPROTO);
339 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
343 ptlrpc_req_finished(req);
347 static int osc_setattr_interpret(const struct lu_env *env,
348 struct ptlrpc_request *req,
349 struct osc_async_args *aa, int rc)
351 struct ost_body *body;
357 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
359 GOTO(out, rc = -EPROTO);
361 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
363 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
367 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
368 struct obd_trans_info *oti,
369 struct ptlrpc_request_set *rqset)
371 struct ptlrpc_request *req;
372 struct osc_async_args *aa;
376 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
380 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
381 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
383 ptlrpc_request_free(req);
387 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
388 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
390 osc_pack_req_body(req, oinfo);
392 ptlrpc_request_set_replen(req);
394 /* do mds to ost setattr asynchronously */
396 /* Do not wait for response. */
397 ptlrpcd_add_req(req, PSCOPE_OTHER);
399 req->rq_interpret_reply =
400 (ptlrpc_interpterer_t)osc_setattr_interpret;
402 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
403 aa = ptlrpc_req_async_args(req);
406 ptlrpc_set_add_req(rqset, req);
412 int osc_real_create(struct obd_export *exp, struct obdo *oa,
413 struct lov_stripe_md **ea, struct obd_trans_info *oti)
415 struct ptlrpc_request *req;
416 struct ost_body *body;
417 struct lov_stripe_md *lsm;
426 rc = obd_alloc_memmd(exp, &lsm);
431 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
433 GOTO(out, rc = -ENOMEM);
435 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
437 ptlrpc_request_free(req);
441 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
443 lustre_set_wire_obdo(&body->oa, oa);
445 ptlrpc_request_set_replen(req);
447 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
448 oa->o_flags == OBD_FL_DELORPHAN) {
450 "delorphan from OST integration");
451 /* Don't resend the delorphan req */
452 req->rq_no_resend = req->rq_no_delay = 1;
455 rc = ptlrpc_queue_wait(req);
459 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
461 GOTO(out_req, rc = -EPROTO);
463 lustre_get_wire_obdo(oa, &body->oa);
465 /* This should really be sent by the OST */
466 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
467 oa->o_valid |= OBD_MD_FLBLKSZ;
469 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
470 * have valid lsm_oinfo data structs, so don't go touching that.
471 * This needs to be fixed in a big way.
473 lsm->lsm_object_id = oa->o_id;
474 lsm->lsm_object_gr = oa->o_gr;
478 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
480 if (oa->o_valid & OBD_MD_FLCOOKIE) {
481 if (!oti->oti_logcookies)
482 oti_alloc_cookies(oti, 1);
483 *oti->oti_logcookies = oa->o_lcookie;
487 CDEBUG(D_HA, "transno: "LPD64"\n",
488 lustre_msg_get_transno(req->rq_repmsg));
490 ptlrpc_req_finished(req);
493 obd_free_memmd(exp, &lsm);
497 static int osc_punch_interpret(const struct lu_env *env,
498 struct ptlrpc_request *req,
499 struct osc_punch_args *aa, int rc)
501 struct ost_body *body;
507 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
509 GOTO(out, rc = -EPROTO);
511 lustre_get_wire_obdo(aa->pa_oa, &body->oa);
513 rc = aa->pa_upcall(aa->pa_cookie, rc);
517 int osc_punch_base(struct obd_export *exp, struct obdo *oa,
518 struct obd_capa *capa,
519 obd_enqueue_update_f upcall, void *cookie,
520 struct ptlrpc_request_set *rqset)
522 struct ptlrpc_request *req;
523 struct osc_punch_args *aa;
524 struct ost_body *body;
528 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
532 osc_set_capa_size(req, &RMF_CAPA1, capa);
533 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
535 ptlrpc_request_free(req);
538 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
539 ptlrpc_at_set_req_timeout(req);
541 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
543 lustre_set_wire_obdo(&body->oa, oa);
544 osc_pack_capa(req, body, capa);
546 ptlrpc_request_set_replen(req);
549 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_punch_interpret;
550 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
551 aa = ptlrpc_req_async_args(req);
553 aa->pa_upcall = upcall;
554 aa->pa_cookie = cookie;
555 if (rqset == PTLRPCD_SET)
556 ptlrpcd_add_req(req, PSCOPE_OTHER);
558 ptlrpc_set_add_req(rqset, req);
563 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
564 struct obd_trans_info *oti,
565 struct ptlrpc_request_set *rqset)
567 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
568 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
569 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
570 return osc_punch_base(exp, oinfo->oi_oa, oinfo->oi_capa,
571 oinfo->oi_cb_up, oinfo, rqset);
574 static int osc_sync(struct obd_export *exp, struct obdo *oa,
575 struct lov_stripe_md *md, obd_size start, obd_size end,
578 struct ptlrpc_request *req;
579 struct ost_body *body;
584 CDEBUG(D_INFO, "oa NULL\n");
588 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
592 osc_set_capa_size(req, &RMF_CAPA1, capa);
593 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
595 ptlrpc_request_free(req);
599 /* overload the size and blocks fields in the oa with start/end */
600 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
602 lustre_set_wire_obdo(&body->oa, oa);
603 body->oa.o_size = start;
604 body->oa.o_blocks = end;
605 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
606 osc_pack_capa(req, body, capa);
608 ptlrpc_request_set_replen(req);
610 rc = ptlrpc_queue_wait(req);
614 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
616 GOTO(out, rc = -EPROTO);
618 lustre_get_wire_obdo(oa, &body->oa);
622 ptlrpc_req_finished(req);
626 /* Find and cancel locally locks matched by @mode in the resource found by
627 * @objid. Found locks are added into @cancel list. Returns the amount of
628 * locks added to @cancels list. */
629 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
631 ldlm_mode_t mode, int lock_flags)
633 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
634 struct ldlm_res_id res_id;
635 struct ldlm_resource *res;
639 osc_build_res_name(oa->o_id, oa->o_gr, &res_id);
640 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
644 LDLM_RESOURCE_ADDREF(res);
645 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
646 lock_flags, 0, NULL);
647 LDLM_RESOURCE_DELREF(res);
648 ldlm_resource_putref(res);
652 static int osc_destroy_interpret(const struct lu_env *env,
653 struct ptlrpc_request *req, void *data,
656 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
658 cfs_atomic_dec(&cli->cl_destroy_in_flight);
659 cfs_waitq_signal(&cli->cl_destroy_waitq);
663 static int osc_can_send_destroy(struct client_obd *cli)
665 if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
666 cli->cl_max_rpcs_in_flight) {
667 /* The destroy request can be sent */
670 if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
671 cli->cl_max_rpcs_in_flight) {
673 * The counter has been modified between the two atomic
676 cfs_waitq_signal(&cli->cl_destroy_waitq);
681 /* Destroy requests can be async always on the client, and we don't even really
682 * care about the return code since the client cannot do anything at all about
684 * When the MDS is unlinking a filename, it saves the file objects into a
685 * recovery llog, and these object records are cancelled when the OST reports
686 * they were destroyed and sync'd to disk (i.e. transaction committed).
687 * If the client dies, or the OST is down when the object should be destroyed,
688 * the records are not cancelled, and when the OST reconnects to the MDS next,
689 * it will retrieve the llog unlink logs and then sends the log cancellation
690 * cookies to the MDS after committing destroy transactions. */
691 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
692 struct lov_stripe_md *ea, struct obd_trans_info *oti,
693 struct obd_export *md_export, void *capa)
695 struct client_obd *cli = &exp->exp_obd->u.cli;
696 struct ptlrpc_request *req;
697 struct ost_body *body;
698 CFS_LIST_HEAD(cancels);
703 CDEBUG(D_INFO, "oa NULL\n");
707 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
708 LDLM_FL_DISCARD_DATA);
710 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
712 ldlm_lock_list_put(&cancels, l_bl_ast, count);
716 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
717 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
720 ptlrpc_request_free(req);
724 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
725 ptlrpc_at_set_req_timeout(req);
727 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
728 oa->o_lcookie = *oti->oti_logcookies;
729 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
731 lustre_set_wire_obdo(&body->oa, oa);
733 osc_pack_capa(req, body, (struct obd_capa *)capa);
734 ptlrpc_request_set_replen(req);
736 /* don't throttle destroy RPCs for the MDT */
737 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
738 req->rq_interpret_reply = osc_destroy_interpret;
739 if (!osc_can_send_destroy(cli)) {
740 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
744 * Wait until the number of on-going destroy RPCs drops
745 * under max_rpc_in_flight
747 l_wait_event_exclusive(cli->cl_destroy_waitq,
748 osc_can_send_destroy(cli), &lwi);
752 /* Do not wait for response */
753 ptlrpcd_add_req(req, PSCOPE_OTHER);
757 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
760 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
762 LASSERT(!(oa->o_valid & bits));
765 client_obd_list_lock(&cli->cl_loi_list_lock);
766 oa->o_dirty = cli->cl_dirty;
767 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
768 CERROR("dirty %lu - %lu > dirty_max %lu\n",
769 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
771 } else if (cfs_atomic_read(&obd_dirty_pages) -
772 cfs_atomic_read(&obd_dirty_transit_pages) >
773 obd_max_dirty_pages + 1){
774 /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
775 * not covered by a lock thus they may safely race and trip
776 * this CERROR() unless we add in a small fudge factor (+1). */
777 CERROR("dirty %d - %d > system dirty_max %d\n",
778 cfs_atomic_read(&obd_dirty_pages),
779 cfs_atomic_read(&obd_dirty_transit_pages),
780 obd_max_dirty_pages);
782 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
783 CERROR("dirty %lu - dirty_max %lu too big???\n",
784 cli->cl_dirty, cli->cl_dirty_max);
787 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
788 (cli->cl_max_rpcs_in_flight + 1);
789 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
791 oa->o_grant = cli->cl_avail_grant;
792 oa->o_dropped = cli->cl_lost_grant;
793 cli->cl_lost_grant = 0;
794 client_obd_list_unlock(&cli->cl_loi_list_lock);
795 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
796 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
800 static void osc_update_next_shrink(struct client_obd *cli)
802 cli->cl_next_shrink_grant =
803 cfs_time_shift(cli->cl_grant_shrink_interval);
804 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
805 cli->cl_next_shrink_grant);
808 /* caller must hold loi_list_lock */
809 static void osc_consume_write_grant(struct client_obd *cli,
810 struct brw_page *pga)
812 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
813 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
814 cfs_atomic_inc(&obd_dirty_pages);
815 cli->cl_dirty += CFS_PAGE_SIZE;
816 cli->cl_avail_grant -= CFS_PAGE_SIZE;
817 pga->flag |= OBD_BRW_FROM_GRANT;
818 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
819 CFS_PAGE_SIZE, pga, pga->pg);
820 LASSERT(cli->cl_avail_grant >= 0);
821 osc_update_next_shrink(cli);
824 /* the companion to osc_consume_write_grant, called when a brw has completed.
825 * must be called with the loi lock held. */
826 static void osc_release_write_grant(struct client_obd *cli,
827 struct brw_page *pga, int sent)
829 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
832 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock.lock);
833 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
838 pga->flag &= ~OBD_BRW_FROM_GRANT;
839 cfs_atomic_dec(&obd_dirty_pages);
840 cli->cl_dirty -= CFS_PAGE_SIZE;
841 if (pga->flag & OBD_BRW_NOCACHE) {
842 pga->flag &= ~OBD_BRW_NOCACHE;
843 cfs_atomic_dec(&obd_dirty_transit_pages);
844 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
847 cli->cl_lost_grant += CFS_PAGE_SIZE;
848 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
849 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
850 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
851 /* For short writes we shouldn't count parts of pages that
852 * span a whole block on the OST side, or our accounting goes
853 * wrong. Should match the code in filter_grant_check. */
854 int offset = pga->off & ~CFS_PAGE_MASK;
855 int count = pga->count + (offset & (blocksize - 1));
856 int end = (offset + pga->count) & (blocksize - 1);
858 count += blocksize - end;
860 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
861 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
862 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
863 cli->cl_avail_grant, cli->cl_dirty);
869 static unsigned long rpcs_in_flight(struct client_obd *cli)
871 return cli->cl_r_in_flight + cli->cl_w_in_flight;
874 /* caller must hold loi_list_lock */
875 void osc_wake_cache_waiters(struct client_obd *cli)
878 struct osc_cache_waiter *ocw;
881 cfs_list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
882 /* if we can't dirty more, we must wait until some is written */
883 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
884 (cfs_atomic_read(&obd_dirty_pages) + 1 >
885 obd_max_dirty_pages)) {
886 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
887 "osc max %ld, sys max %d\n", cli->cl_dirty,
888 cli->cl_dirty_max, obd_max_dirty_pages);
892 /* if still dirty cache but no grant wait for pending RPCs that
893 * may yet return us some grant before doing sync writes */
894 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
895 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
896 cli->cl_w_in_flight);
900 ocw = cfs_list_entry(l, struct osc_cache_waiter, ocw_entry);
901 cfs_list_del_init(&ocw->ocw_entry);
902 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
903 /* no more RPCs in flight to return grant, do sync IO */
904 ocw->ocw_rc = -EDQUOT;
905 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
907 osc_consume_write_grant(cli,
908 &ocw->ocw_oap->oap_brw_page);
911 cfs_waitq_signal(&ocw->ocw_waitq);
917 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
919 client_obd_list_lock(&cli->cl_loi_list_lock);
920 cli->cl_avail_grant += grant;
921 client_obd_list_unlock(&cli->cl_loi_list_lock);
924 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
926 if (body->oa.o_valid & OBD_MD_FLGRANT) {
927 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
928 __osc_update_grant(cli, body->oa.o_grant);
932 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
933 void *key, obd_count vallen, void *val,
934 struct ptlrpc_request_set *set);
936 static int osc_shrink_grant_interpret(const struct lu_env *env,
937 struct ptlrpc_request *req,
940 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
941 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
942 struct ost_body *body;
945 __osc_update_grant(cli, oa->o_grant);
949 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
951 osc_update_grant(cli, body);
957 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
959 client_obd_list_lock(&cli->cl_loi_list_lock);
960 oa->o_grant = cli->cl_avail_grant / 4;
961 cli->cl_avail_grant -= oa->o_grant;
962 client_obd_list_unlock(&cli->cl_loi_list_lock);
963 oa->o_flags |= OBD_FL_SHRINK_GRANT;
964 osc_update_next_shrink(cli);
967 /* Shrink the current grant, either from some large amount to enough for a
968 * full set of in-flight RPCs, or if we have already shrunk to that limit
969 * then to enough for a single RPC. This avoids keeping more grant than
970 * needed, and avoids shrinking the grant piecemeal. */
971 static int osc_shrink_grant(struct client_obd *cli)
973 long target = (cli->cl_max_rpcs_in_flight + 1) *
974 cli->cl_max_pages_per_rpc;
976 client_obd_list_lock(&cli->cl_loi_list_lock);
977 if (cli->cl_avail_grant <= target)
978 target = cli->cl_max_pages_per_rpc;
979 client_obd_list_unlock(&cli->cl_loi_list_lock);
981 return osc_shrink_grant_to_target(cli, target);
984 int osc_shrink_grant_to_target(struct client_obd *cli, long target)
987 struct ost_body *body;
990 client_obd_list_lock(&cli->cl_loi_list_lock);
991 /* Don't shrink if we are already above or below the desired limit
992 * We don't want to shrink below a single RPC, as that will negatively
993 * impact block allocation and long-term performance. */
994 if (target < cli->cl_max_pages_per_rpc)
995 target = cli->cl_max_pages_per_rpc;
997 if (target >= cli->cl_avail_grant) {
998 client_obd_list_unlock(&cli->cl_loi_list_lock);
1001 client_obd_list_unlock(&cli->cl_loi_list_lock);
1003 OBD_ALLOC_PTR(body);
1007 osc_announce_cached(cli, &body->oa, 0);
1009 client_obd_list_lock(&cli->cl_loi_list_lock);
1010 body->oa.o_grant = cli->cl_avail_grant - target;
1011 cli->cl_avail_grant = target;
1012 client_obd_list_unlock(&cli->cl_loi_list_lock);
1013 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
1014 osc_update_next_shrink(cli);
1016 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
1017 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
1018 sizeof(*body), body, NULL);
1020 __osc_update_grant(cli, body->oa.o_grant);
1025 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
1026 static int osc_should_shrink_grant(struct client_obd *client)
1028 cfs_time_t time = cfs_time_current();
1029 cfs_time_t next_shrink = client->cl_next_shrink_grant;
1030 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
1031 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
1032 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
1035 osc_update_next_shrink(client);
1040 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1042 struct client_obd *client;
1044 cfs_list_for_each_entry(client, &item->ti_obd_list,
1045 cl_grant_shrink_list) {
1046 if (osc_should_shrink_grant(client))
1047 osc_shrink_grant(client);
1052 static int osc_add_shrink_grant(struct client_obd *client)
1056 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1058 osc_grant_shrink_grant_cb, NULL,
1059 &client->cl_grant_shrink_list);
1061 CERROR("add grant client %s error %d\n",
1062 client->cl_import->imp_obd->obd_name, rc);
1065 CDEBUG(D_CACHE, "add grant client %s \n",
1066 client->cl_import->imp_obd->obd_name);
1067 osc_update_next_shrink(client);
1071 static int osc_del_shrink_grant(struct client_obd *client)
1073 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1077 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1080 * ocd_grant is the total grant amount we're expect to hold: if we've
1081 * been evicted, it's the new avail_grant amount, cl_dirty will drop
1082 * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
1084 * race is tolerable here: if we're evicted, but imp_state already
1085 * left EVICTED state, then cl_dirty must be 0 already.
1087 client_obd_list_lock(&cli->cl_loi_list_lock);
1088 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1089 cli->cl_avail_grant = ocd->ocd_grant;
1091 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
1092 client_obd_list_unlock(&cli->cl_loi_list_lock);
1094 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1095 cli->cl_avail_grant, cli->cl_lost_grant);
1096 LASSERT(cli->cl_avail_grant >= 0);
1098 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1099 cfs_list_empty(&cli->cl_grant_shrink_list))
1100 osc_add_shrink_grant(cli);
1103 /* We assume that the reason this OSC got a short read is because it read
1104 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1105 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1106 * this stripe never got written at or beyond this stripe offset yet. */
1107 static void handle_short_read(int nob_read, obd_count page_count,
1108 struct brw_page **pga)
1113 /* skip bytes read OK */
1114 while (nob_read > 0) {
1115 LASSERT (page_count > 0);
1117 if (pga[i]->count > nob_read) {
1118 /* EOF inside this page */
1119 ptr = cfs_kmap(pga[i]->pg) +
1120 (pga[i]->off & ~CFS_PAGE_MASK);
1121 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1122 cfs_kunmap(pga[i]->pg);
1128 nob_read -= pga[i]->count;
1133 /* zero remaining pages */
1134 while (page_count-- > 0) {
1135 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1136 memset(ptr, 0, pga[i]->count);
1137 cfs_kunmap(pga[i]->pg);
1142 static int check_write_rcs(struct ptlrpc_request *req,
1143 int requested_nob, int niocount,
1144 obd_count page_count, struct brw_page **pga)
1149 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1150 sizeof(*remote_rcs) *
1152 if (remote_rcs == NULL) {
1153 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1157 /* return error if any niobuf was in error */
1158 for (i = 0; i < niocount; i++) {
1159 if (remote_rcs[i] < 0)
1160 return(remote_rcs[i]);
1162 if (remote_rcs[i] != 0) {
1163 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1164 i, remote_rcs[i], req);
1169 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1170 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1171 req->rq_bulk->bd_nob_transferred, requested_nob);
1178 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1180 if (p1->flag != p2->flag) {
1181 unsigned mask = ~(OBD_BRW_FROM_GRANT|
1182 OBD_BRW_NOCACHE|OBD_BRW_SYNC);
1184 /* warn if we try to combine flags that we don't know to be
1185 * safe to combine */
1186 if ((p1->flag & mask) != (p2->flag & mask))
1187 CERROR("is it ok to have flags 0x%x and 0x%x in the "
1188 "same brw?\n", p1->flag, p2->flag);
1192 return (p1->off + p1->count == p2->off);
1195 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1196 struct brw_page **pga, int opc,
1197 cksum_type_t cksum_type)
1202 LASSERT (pg_count > 0);
1203 cksum = init_checksum(cksum_type);
1204 while (nob > 0 && pg_count > 0) {
1205 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1206 int off = pga[i]->off & ~CFS_PAGE_MASK;
1207 int count = pga[i]->count > nob ? nob : pga[i]->count;
1209 /* corrupt the data before we compute the checksum, to
1210 * simulate an OST->client data error */
1211 if (i == 0 && opc == OST_READ &&
1212 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1213 memcpy(ptr + off, "bad1", min(4, nob));
1214 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1215 cfs_kunmap(pga[i]->pg);
1216 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1219 nob -= pga[i]->count;
1223 /* For sending we only compute the wrong checksum instead
1224 * of corrupting the data so it is still correct on a redo */
1225 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1231 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1232 struct lov_stripe_md *lsm, obd_count page_count,
1233 struct brw_page **pga,
1234 struct ptlrpc_request **reqp,
1235 struct obd_capa *ocapa, int reserve)
1237 struct ptlrpc_request *req;
1238 struct ptlrpc_bulk_desc *desc;
1239 struct ost_body *body;
1240 struct obd_ioobj *ioobj;
1241 struct niobuf_remote *niobuf;
1242 int niocount, i, requested_nob, opc, rc;
1243 struct osc_brw_async_args *aa;
1244 struct req_capsule *pill;
1245 struct brw_page *pg_prev;
1248 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1249 RETURN(-ENOMEM); /* Recoverable */
1250 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1251 RETURN(-EINVAL); /* Fatal */
1253 if ((cmd & OBD_BRW_WRITE) != 0) {
1255 req = ptlrpc_request_alloc_pool(cli->cl_import,
1256 cli->cl_import->imp_rq_pool,
1257 &RQF_OST_BRW_WRITE);
1260 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1265 for (niocount = i = 1; i < page_count; i++) {
1266 if (!can_merge_pages(pga[i - 1], pga[i]))
1270 pill = &req->rq_pill;
1271 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1273 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1274 niocount * sizeof(*niobuf));
1275 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1277 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1279 ptlrpc_request_free(req);
1282 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1283 ptlrpc_at_set_req_timeout(req);
1285 if (opc == OST_WRITE)
1286 desc = ptlrpc_prep_bulk_imp(req, page_count,
1287 BULK_GET_SOURCE, OST_BULK_PORTAL);
1289 desc = ptlrpc_prep_bulk_imp(req, page_count,
1290 BULK_PUT_SINK, OST_BULK_PORTAL);
1293 GOTO(out, rc = -ENOMEM);
1294 /* NB request now owns desc and will free it when it gets freed */
1296 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1297 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1298 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1299 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1301 lustre_set_wire_obdo(&body->oa, oa);
1303 obdo_to_ioobj(oa, ioobj);
1304 ioobj->ioo_bufcnt = niocount;
1305 osc_pack_capa(req, body, ocapa);
1306 LASSERT (page_count > 0);
1308 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1309 struct brw_page *pg = pga[i];
1311 LASSERT(pg->count > 0);
1312 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1313 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1314 pg->off, pg->count);
1316 LASSERTF(i == 0 || pg->off > pg_prev->off,
1317 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1318 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1320 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1321 pg_prev->pg, page_private(pg_prev->pg),
1322 pg_prev->pg->index, pg_prev->off);
1324 LASSERTF(i == 0 || pg->off > pg_prev->off,
1325 "i %d p_c %u\n", i, page_count);
1327 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1328 (pg->flag & OBD_BRW_SRVLOCK));
1330 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1332 requested_nob += pg->count;
1334 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1336 niobuf->len += pg->count;
1338 niobuf->offset = pg->off;
1339 niobuf->len = pg->count;
1340 niobuf->flags = pg->flag;
1345 LASSERTF((void *)(niobuf - niocount) ==
1346 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1347 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1348 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1350 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1351 if (osc_should_shrink_grant(cli))
1352 osc_shrink_grant_local(cli, &body->oa);
1354 /* size[REQ_REC_OFF] still sizeof (*body) */
1355 if (opc == OST_WRITE) {
1356 if (unlikely(cli->cl_checksum) &&
1357 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1358 /* store cl_cksum_type in a local variable since
1359 * it can be changed via lprocfs */
1360 cksum_type_t cksum_type = cli->cl_cksum_type;
1362 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1363 oa->o_flags &= OBD_FL_LOCAL_MASK;
1364 body->oa.o_flags = 0;
1366 body->oa.o_flags |= cksum_type_pack(cksum_type);
1367 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1368 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1372 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1374 /* save this in 'oa', too, for later checking */
1375 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1376 oa->o_flags |= cksum_type_pack(cksum_type);
1378 /* clear out the checksum flag, in case this is a
1379 * resend but cl_checksum is no longer set. b=11238 */
1380 oa->o_valid &= ~OBD_MD_FLCKSUM;
1382 oa->o_cksum = body->oa.o_cksum;
1383 /* 1 RC per niobuf */
1384 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1385 sizeof(__u32) * niocount);
1387 if (unlikely(cli->cl_checksum) &&
1388 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1389 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1390 body->oa.o_flags = 0;
1391 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1392 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1395 ptlrpc_request_set_replen(req);
1397 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1398 aa = ptlrpc_req_async_args(req);
1400 aa->aa_requested_nob = requested_nob;
1401 aa->aa_nio_count = niocount;
1402 aa->aa_page_count = page_count;
1406 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1407 if (ocapa && reserve)
1408 aa->aa_ocapa = capa_get(ocapa);
1414 ptlrpc_req_finished(req);
1418 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1419 __u32 client_cksum, __u32 server_cksum, int nob,
1420 obd_count page_count, struct brw_page **pga,
1421 cksum_type_t client_cksum_type)
1425 cksum_type_t cksum_type;
1427 if (server_cksum == client_cksum) {
1428 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1432 if (oa->o_valid & OBD_MD_FLFLAGS)
1433 cksum_type = cksum_type_unpack(oa->o_flags);
1435 cksum_type = OBD_CKSUM_CRC32;
1437 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1440 if (cksum_type != client_cksum_type)
1441 msg = "the server did not use the checksum type specified in "
1442 "the original request - likely a protocol problem";
1443 else if (new_cksum == server_cksum)
1444 msg = "changed on the client after we checksummed it - "
1445 "likely false positive due to mmap IO (bug 11742)";
1446 else if (new_cksum == client_cksum)
1447 msg = "changed in transit before arrival at OST";
1449 msg = "changed in transit AND doesn't match the original - "
1450 "likely false positive due to mmap IO (bug 11742)";
1452 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1453 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1454 "["LPU64"-"LPU64"]\n",
1455 msg, libcfs_nid2str(peer->nid),
1456 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1457 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1460 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1462 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1463 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1464 "client csum now %x\n", client_cksum, client_cksum_type,
1465 server_cksum, cksum_type, new_cksum);
1469 /* Note rc enters this function as number of bytes transferred */
1470 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1472 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1473 const lnet_process_id_t *peer =
1474 &req->rq_import->imp_connection->c_peer;
1475 struct client_obd *cli = aa->aa_cli;
1476 struct ost_body *body;
1477 __u32 client_cksum = 0;
1480 if (rc < 0 && rc != -EDQUOT) {
1481 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1485 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1486 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1488 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1492 #ifdef HAVE_QUOTA_SUPPORT
1493 /* set/clear over quota flag for a uid/gid */
1494 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1495 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1496 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1498 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid %llx, flags %x\n",
1499 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1501 lquota_setdq(quota_interface, cli, qid, body->oa.o_valid,
1509 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1510 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1512 osc_update_grant(cli, body);
1514 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1516 CERROR("Unexpected +ve rc %d\n", rc);
1519 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1521 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1524 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1525 check_write_checksum(&body->oa, peer, client_cksum,
1526 body->oa.o_cksum, aa->aa_requested_nob,
1527 aa->aa_page_count, aa->aa_ppga,
1528 cksum_type_unpack(aa->aa_oa->o_flags)))
1531 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1532 aa->aa_page_count, aa->aa_ppga);
1536 /* The rest of this function executes only for OST_READs */
1538 /* if unwrap_bulk failed, return -EAGAIN to retry */
1539 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1541 GOTO(out, rc = -EAGAIN);
1543 if (rc > aa->aa_requested_nob) {
1544 CERROR("Unexpected rc %d (%d requested)\n", rc,
1545 aa->aa_requested_nob);
1549 if (rc != req->rq_bulk->bd_nob_transferred) {
1550 CERROR ("Unexpected rc %d (%d transferred)\n",
1551 rc, req->rq_bulk->bd_nob_transferred);
1555 if (rc < aa->aa_requested_nob)
1556 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1558 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1559 static int cksum_counter;
1560 __u32 server_cksum = body->oa.o_cksum;
1563 cksum_type_t cksum_type;
1565 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1566 cksum_type = cksum_type_unpack(body->oa.o_flags);
1568 cksum_type = OBD_CKSUM_CRC32;
1569 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1570 aa->aa_ppga, OST_READ,
1573 if (peer->nid == req->rq_bulk->bd_sender) {
1577 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1580 if (server_cksum == ~0 && rc > 0) {
1581 CERROR("Protocol error: server %s set the 'checksum' "
1582 "bit, but didn't send a checksum. Not fatal, "
1583 "but please notify on http://bugzilla.lustre.org/\n",
1584 libcfs_nid2str(peer->nid));
1585 } else if (server_cksum != client_cksum) {
1586 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1587 "%s%s%s inum "LPU64"/"LPU64" object "
1588 LPU64"/"LPU64" extent "
1589 "["LPU64"-"LPU64"]\n",
1590 req->rq_import->imp_obd->obd_name,
1591 libcfs_nid2str(peer->nid),
1593 body->oa.o_valid & OBD_MD_FLFID ?
1594 body->oa.o_fid : (__u64)0,
1595 body->oa.o_valid & OBD_MD_FLFID ?
1596 body->oa.o_generation :(__u64)0,
1598 body->oa.o_valid & OBD_MD_FLGROUP ?
1599 body->oa.o_gr : (__u64)0,
1600 aa->aa_ppga[0]->off,
1601 aa->aa_ppga[aa->aa_page_count-1]->off +
1602 aa->aa_ppga[aa->aa_page_count-1]->count -
1604 CERROR("client %x, server %x, cksum_type %x\n",
1605 client_cksum, server_cksum, cksum_type);
1607 aa->aa_oa->o_cksum = client_cksum;
1611 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1614 } else if (unlikely(client_cksum)) {
1615 static int cksum_missed;
1618 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1619 CERROR("Checksum %u requested from %s but not sent\n",
1620 cksum_missed, libcfs_nid2str(peer->nid));
1626 lustre_get_wire_obdo(aa->aa_oa, &body->oa);
1631 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1632 struct lov_stripe_md *lsm,
1633 obd_count page_count, struct brw_page **pga,
1634 struct obd_capa *ocapa)
1636 struct ptlrpc_request *req;
1640 struct l_wait_info lwi;
1644 cfs_waitq_init(&waitq);
1647 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1648 page_count, pga, &req, ocapa, 0);
1652 rc = ptlrpc_queue_wait(req);
1654 if (rc == -ETIMEDOUT && req->rq_resend) {
1655 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1656 ptlrpc_req_finished(req);
1660 rc = osc_brw_fini_request(req, rc);
1662 ptlrpc_req_finished(req);
1663 if (osc_recoverable_error(rc)) {
1665 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1666 CERROR("too many resend retries, returning error\n");
1670 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1671 l_wait_event(waitq, 0, &lwi);
1679 int osc_brw_redo_request(struct ptlrpc_request *request,
1680 struct osc_brw_async_args *aa)
1682 struct ptlrpc_request *new_req;
1683 struct ptlrpc_request_set *set = request->rq_set;
1684 struct osc_brw_async_args *new_aa;
1685 struct osc_async_page *oap;
1689 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1690 CERROR("too many resend retries, returning error\n");
1694 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1696 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1697 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1698 aa->aa_cli, aa->aa_oa,
1699 NULL /* lsm unused by osc currently */,
1700 aa->aa_page_count, aa->aa_ppga,
1701 &new_req, aa->aa_ocapa, 0);
1705 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1707 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1708 if (oap->oap_request != NULL) {
1709 LASSERTF(request == oap->oap_request,
1710 "request %p != oap_request %p\n",
1711 request, oap->oap_request);
1712 if (oap->oap_interrupted) {
1713 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1714 ptlrpc_req_finished(new_req);
1719 /* New request takes over pga and oaps from old request.
1720 * Note that copying a list_head doesn't work, need to move it... */
1722 new_req->rq_interpret_reply = request->rq_interpret_reply;
1723 new_req->rq_async_args = request->rq_async_args;
1724 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1726 new_aa = ptlrpc_req_async_args(new_req);
1728 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1729 cfs_list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1730 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1732 cfs_list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1733 if (oap->oap_request) {
1734 ptlrpc_req_finished(oap->oap_request);
1735 oap->oap_request = ptlrpc_request_addref(new_req);
1739 new_aa->aa_ocapa = aa->aa_ocapa;
1740 aa->aa_ocapa = NULL;
1742 /* use ptlrpc_set_add_req is safe because interpret functions work
1743 * in check_set context. only one way exist with access to request
1744 * from different thread got -EINTR - this way protected with
1745 * cl_loi_list_lock */
1746 ptlrpc_set_add_req(set, new_req);
1748 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1750 DEBUG_REQ(D_INFO, new_req, "new request");
1755 * ugh, we want disk allocation on the target to happen in offset order. we'll
1756 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1757 * fine for our small page arrays and doesn't require allocation. its an
1758 * insertion sort that swaps elements that are strides apart, shrinking the
1759 * stride down until its '1' and the array is sorted.
1761 static void sort_brw_pages(struct brw_page **array, int num)
1764 struct brw_page *tmp;
1768 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1773 for (i = stride ; i < num ; i++) {
1776 while (j >= stride && array[j - stride]->off > tmp->off) {
1777 array[j] = array[j - stride];
1782 } while (stride > 1);
1785 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1791 LASSERT (pages > 0);
1792 offset = pg[i]->off & ~CFS_PAGE_MASK;
1796 if (pages == 0) /* that's all */
1799 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1800 return count; /* doesn't end on page boundary */
1803 offset = pg[i]->off & ~CFS_PAGE_MASK;
1804 if (offset != 0) /* doesn't start on page boundary */
1811 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1813 struct brw_page **ppga;
1816 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1820 for (i = 0; i < count; i++)
1825 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1827 LASSERT(ppga != NULL);
1828 OBD_FREE(ppga, sizeof(*ppga) * count);
1831 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1832 obd_count page_count, struct brw_page *pga,
1833 struct obd_trans_info *oti)
1835 struct obdo *saved_oa = NULL;
1836 struct brw_page **ppga, **orig;
1837 struct obd_import *imp = class_exp2cliimp(exp);
1838 struct client_obd *cli;
1839 int rc, page_count_orig;
1842 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1843 cli = &imp->imp_obd->u.cli;
1845 if (cmd & OBD_BRW_CHECK) {
1846 /* The caller just wants to know if there's a chance that this
1847 * I/O can succeed */
1849 if (imp->imp_invalid)
1854 /* test_brw with a failed create can trip this, maybe others. */
1855 LASSERT(cli->cl_max_pages_per_rpc);
1859 orig = ppga = osc_build_ppga(pga, page_count);
1862 page_count_orig = page_count;
1864 sort_brw_pages(ppga, page_count);
1865 while (page_count) {
1866 obd_count pages_per_brw;
1868 if (page_count > cli->cl_max_pages_per_rpc)
1869 pages_per_brw = cli->cl_max_pages_per_rpc;
1871 pages_per_brw = page_count;
1873 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1875 if (saved_oa != NULL) {
1876 /* restore previously saved oa */
1877 *oinfo->oi_oa = *saved_oa;
1878 } else if (page_count > pages_per_brw) {
1879 /* save a copy of oa (brw will clobber it) */
1880 OBDO_ALLOC(saved_oa);
1881 if (saved_oa == NULL)
1882 GOTO(out, rc = -ENOMEM);
1883 *saved_oa = *oinfo->oi_oa;
1886 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1887 pages_per_brw, ppga, oinfo->oi_capa);
1892 page_count -= pages_per_brw;
1893 ppga += pages_per_brw;
1897 osc_release_ppga(orig, page_count_orig);
1899 if (saved_oa != NULL)
1900 OBDO_FREE(saved_oa);
1905 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1906 * the dirty accounting. Writeback completes or truncate happens before
1907 * writing starts. Must be called with the loi lock held. */
1908 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1911 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1915 /* This maintains the lists of pending pages to read/write for a given object
1916 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1917 * to quickly find objects that are ready to send an RPC. */
1918 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1924 if (lop->lop_num_pending == 0)
1927 /* if we have an invalid import we want to drain the queued pages
1928 * by forcing them through rpcs that immediately fail and complete
1929 * the pages. recovery relies on this to empty the queued pages
1930 * before canceling the locks and evicting down the llite pages */
1931 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1934 /* stream rpcs in queue order as long as as there is an urgent page
1935 * queued. this is our cheap solution for good batching in the case
1936 * where writepage marks some random page in the middle of the file
1937 * as urgent because of, say, memory pressure */
1938 if (!cfs_list_empty(&lop->lop_urgent)) {
1939 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1942 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1943 optimal = cli->cl_max_pages_per_rpc;
1944 if (cmd & OBD_BRW_WRITE) {
1945 /* trigger a write rpc stream as long as there are dirtiers
1946 * waiting for space. as they're waiting, they're not going to
1947 * create more pages to coallesce with what's waiting.. */
1948 if (!cfs_list_empty(&cli->cl_cache_waiters)) {
1949 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1952 /* +16 to avoid triggering rpcs that would want to include pages
1953 * that are being queued but which can't be made ready until
1954 * the queuer finishes with the page. this is a wart for
1955 * llite::commit_write() */
1958 if (lop->lop_num_pending >= optimal)
1964 static int lop_makes_hprpc(struct loi_oap_pages *lop)
1966 struct osc_async_page *oap;
1969 if (cfs_list_empty(&lop->lop_urgent))
1972 oap = cfs_list_entry(lop->lop_urgent.next,
1973 struct osc_async_page, oap_urgent_item);
1975 if (oap->oap_async_flags & ASYNC_HP) {
1976 CDEBUG(D_CACHE, "hp request forcing RPC\n");
1983 static void on_list(cfs_list_t *item, cfs_list_t *list,
1986 if (cfs_list_empty(item) && should_be_on)
1987 cfs_list_add_tail(item, list);
1988 else if (!cfs_list_empty(item) && !should_be_on)
1989 cfs_list_del_init(item);
1992 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1993 * can find pages to build into rpcs quickly */
1994 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1996 if (lop_makes_hprpc(&loi->loi_write_lop) ||
1997 lop_makes_hprpc(&loi->loi_read_lop)) {
1999 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
2000 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
2002 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
2003 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
2004 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
2005 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
2008 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
2009 loi->loi_write_lop.lop_num_pending);
2011 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
2012 loi->loi_read_lop.lop_num_pending);
2015 static void lop_update_pending(struct client_obd *cli,
2016 struct loi_oap_pages *lop, int cmd, int delta)
2018 lop->lop_num_pending += delta;
2019 if (cmd & OBD_BRW_WRITE)
2020 cli->cl_pending_w_pages += delta;
2022 cli->cl_pending_r_pages += delta;
2026 * this is called when a sync waiter receives an interruption. Its job is to
2027 * get the caller woken as soon as possible. If its page hasn't been put in an
2028 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
2029 * desiring interruption which will forcefully complete the rpc once the rpc
2032 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
2034 struct loi_oap_pages *lop;
2035 struct lov_oinfo *loi;
2039 LASSERT(!oap->oap_interrupted);
2040 oap->oap_interrupted = 1;
2042 /* ok, it's been put in an rpc. only one oap gets a request reference */
2043 if (oap->oap_request != NULL) {
2044 ptlrpc_mark_interrupted(oap->oap_request);
2045 ptlrpcd_wake(oap->oap_request);
2046 ptlrpc_req_finished(oap->oap_request);
2047 oap->oap_request = NULL;
2051 * page completion may be called only if ->cpo_prep() method was
2052 * executed by osc_io_submit(), that also adds page the to pending list
2054 if (!cfs_list_empty(&oap->oap_pending_item)) {
2055 cfs_list_del_init(&oap->oap_pending_item);
2056 cfs_list_del_init(&oap->oap_urgent_item);
2059 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2060 &loi->loi_write_lop : &loi->loi_read_lop;
2061 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2062 loi_list_maint(oap->oap_cli, oap->oap_loi);
2063 rc = oap->oap_caller_ops->ap_completion(env,
2064 oap->oap_caller_data,
2065 oap->oap_cmd, NULL, -EINTR);
2071 /* this is trying to propogate async writeback errors back up to the
2072 * application. As an async write fails we record the error code for later if
2073 * the app does an fsync. As long as errors persist we force future rpcs to be
2074 * sync so that the app can get a sync error and break the cycle of queueing
2075 * pages for which writeback will fail. */
2076 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2083 ar->ar_force_sync = 1;
2084 ar->ar_min_xid = ptlrpc_sample_next_xid();
2089 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2090 ar->ar_force_sync = 0;
2093 void osc_oap_to_pending(struct osc_async_page *oap)
2095 struct loi_oap_pages *lop;
2097 if (oap->oap_cmd & OBD_BRW_WRITE)
2098 lop = &oap->oap_loi->loi_write_lop;
2100 lop = &oap->oap_loi->loi_read_lop;
2102 if (oap->oap_async_flags & ASYNC_HP)
2103 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2104 else if (oap->oap_async_flags & ASYNC_URGENT)
2105 cfs_list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2106 cfs_list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2107 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2110 /* this must be called holding the loi list lock to give coverage to exit_cache,
2111 * async_flag maintenance, and oap_request */
2112 static void osc_ap_completion(const struct lu_env *env,
2113 struct client_obd *cli, struct obdo *oa,
2114 struct osc_async_page *oap, int sent, int rc)
2119 if (oap->oap_request != NULL) {
2120 xid = ptlrpc_req_xid(oap->oap_request);
2121 ptlrpc_req_finished(oap->oap_request);
2122 oap->oap_request = NULL;
2125 cfs_spin_lock(&oap->oap_lock);
2126 oap->oap_async_flags = 0;
2127 cfs_spin_unlock(&oap->oap_lock);
2128 oap->oap_interrupted = 0;
2130 if (oap->oap_cmd & OBD_BRW_WRITE) {
2131 osc_process_ar(&cli->cl_ar, xid, rc);
2132 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2135 if (rc == 0 && oa != NULL) {
2136 if (oa->o_valid & OBD_MD_FLBLOCKS)
2137 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2138 if (oa->o_valid & OBD_MD_FLMTIME)
2139 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2140 if (oa->o_valid & OBD_MD_FLATIME)
2141 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2142 if (oa->o_valid & OBD_MD_FLCTIME)
2143 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2146 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2147 oap->oap_cmd, oa, rc);
2149 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2150 * I/O on the page could start, but OSC calls it under lock
2151 * and thus we can add oap back to pending safely */
2153 /* upper layer wants to leave the page on pending queue */
2154 osc_oap_to_pending(oap);
2156 osc_exit_cache(cli, oap, sent);
2160 static int brw_interpret(const struct lu_env *env,
2161 struct ptlrpc_request *req, void *data, int rc)
2163 struct osc_brw_async_args *aa = data;
2164 struct client_obd *cli;
2168 rc = osc_brw_fini_request(req, rc);
2169 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2170 if (osc_recoverable_error(rc)) {
2171 rc = osc_brw_redo_request(req, aa);
2177 capa_put(aa->aa_ocapa);
2178 aa->aa_ocapa = NULL;
2183 client_obd_list_lock(&cli->cl_loi_list_lock);
2185 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2186 * is called so we know whether to go to sync BRWs or wait for more
2187 * RPCs to complete */
2188 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2189 cli->cl_w_in_flight--;
2191 cli->cl_r_in_flight--;
2193 async = cfs_list_empty(&aa->aa_oaps);
2194 if (!async) { /* from osc_send_oap_rpc() */
2195 struct osc_async_page *oap, *tmp;
2196 /* the caller may re-use the oap after the completion call so
2197 * we need to clean it up a little */
2198 cfs_list_for_each_entry_safe(oap, tmp, &aa->aa_oaps,
2200 cfs_list_del_init(&oap->oap_rpc_item);
2201 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2203 OBDO_FREE(aa->aa_oa);
2204 } else { /* from async_internal() */
2206 for (i = 0; i < aa->aa_page_count; i++)
2207 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2209 if (aa->aa_oa->o_flags & OBD_FL_TEMPORARY)
2210 OBDO_FREE(aa->aa_oa);
2212 osc_wake_cache_waiters(cli);
2213 osc_check_rpcs(env, cli);
2214 client_obd_list_unlock(&cli->cl_loi_list_lock);
2216 cl_req_completion(env, aa->aa_clerq, rc);
2217 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2221 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2222 struct client_obd *cli,
2223 cfs_list_t *rpc_list,
2224 int page_count, int cmd)
2226 struct ptlrpc_request *req;
2227 struct brw_page **pga = NULL;
2228 struct osc_brw_async_args *aa;
2229 struct obdo *oa = NULL;
2230 const struct obd_async_page_ops *ops = NULL;
2231 void *caller_data = NULL;
2232 struct osc_async_page *oap;
2233 struct osc_async_page *tmp;
2234 struct ost_body *body;
2235 struct cl_req *clerq = NULL;
2236 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2237 struct ldlm_lock *lock = NULL;
2238 struct cl_req_attr crattr;
2242 LASSERT(!cfs_list_empty(rpc_list));
2244 memset(&crattr, 0, sizeof crattr);
2245 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2247 GOTO(out, req = ERR_PTR(-ENOMEM));
2251 GOTO(out, req = ERR_PTR(-ENOMEM));
2254 cfs_list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2255 struct cl_page *page = osc_oap2cl_page(oap);
2257 ops = oap->oap_caller_ops;
2258 caller_data = oap->oap_caller_data;
2260 clerq = cl_req_alloc(env, page, crt,
2261 1 /* only 1-object rpcs for
2264 GOTO(out, req = (void *)clerq);
2265 lock = oap->oap_ldlm_lock;
2267 pga[i] = &oap->oap_brw_page;
2268 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2269 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2270 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2272 cl_req_page_add(env, clerq, page);
2275 /* always get the data for the obdo for the rpc */
2276 LASSERT(ops != NULL);
2278 crattr.cra_capa = NULL;
2279 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2281 oa->o_handle = lock->l_remote_handle;
2282 oa->o_valid |= OBD_MD_FLHANDLE;
2285 rc = cl_req_prep(env, clerq);
2287 CERROR("cl_req_prep failed: %d\n", rc);
2288 GOTO(out, req = ERR_PTR(rc));
2291 sort_brw_pages(pga, page_count);
2292 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2293 pga, &req, crattr.cra_capa, 1);
2295 CERROR("prep_req failed: %d\n", rc);
2296 GOTO(out, req = ERR_PTR(rc));
2299 /* Need to update the timestamps after the request is built in case
2300 * we race with setattr (locally or in queue at OST). If OST gets
2301 * later setattr before earlier BRW (as determined by the request xid),
2302 * the OST will not use BRW timestamps. Sadly, there is no obvious
2303 * way to do this in a single call. bug 10150 */
2304 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2305 cl_req_attr_set(env, clerq, &crattr,
2306 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2308 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2309 aa = ptlrpc_req_async_args(req);
2310 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2311 cfs_list_splice(rpc_list, &aa->aa_oaps);
2312 CFS_INIT_LIST_HEAD(rpc_list);
2313 aa->aa_clerq = clerq;
2315 capa_put(crattr.cra_capa);
2320 OBD_FREE(pga, sizeof(*pga) * page_count);
2321 /* this should happen rarely and is pretty bad, it makes the
2322 * pending list not follow the dirty order */
2323 client_obd_list_lock(&cli->cl_loi_list_lock);
2324 cfs_list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2325 cfs_list_del_init(&oap->oap_rpc_item);
2327 /* queued sync pages can be torn down while the pages
2328 * were between the pending list and the rpc */
2329 if (oap->oap_interrupted) {
2330 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2331 osc_ap_completion(env, cli, NULL, oap, 0,
2335 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2337 if (clerq && !IS_ERR(clerq))
2338 cl_req_completion(env, clerq, PTR_ERR(req));
2344 * prepare pages for ASYNC io and put pages in send queue.
2346 * \param cmd OBD_BRW_* macroses
2347 * \param lop pending pages
2349 * \return zero if pages successfully add to send queue.
2350 * \return not zere if error occurring.
2353 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2354 struct lov_oinfo *loi,
2355 int cmd, struct loi_oap_pages *lop)
2357 struct ptlrpc_request *req;
2358 obd_count page_count = 0;
2359 struct osc_async_page *oap = NULL, *tmp;
2360 struct osc_brw_async_args *aa;
2361 const struct obd_async_page_ops *ops;
2362 CFS_LIST_HEAD(rpc_list);
2363 CFS_LIST_HEAD(tmp_list);
2364 unsigned int ending_offset;
2365 unsigned starting_offset = 0;
2367 struct cl_object *clob = NULL;
2370 /* ASYNC_HP pages first. At present, when the lock the pages is
2371 * to be canceled, the pages covered by the lock will be sent out
2372 * with ASYNC_HP. We have to send out them as soon as possible. */
2373 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_urgent, oap_urgent_item) {
2374 if (oap->oap_async_flags & ASYNC_HP)
2375 cfs_list_move(&oap->oap_pending_item, &tmp_list);
2377 cfs_list_move_tail(&oap->oap_pending_item, &tmp_list);
2378 if (++page_count >= cli->cl_max_pages_per_rpc)
2382 cfs_list_splice(&tmp_list, &lop->lop_pending);
2385 /* first we find the pages we're allowed to work with */
2386 cfs_list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2388 ops = oap->oap_caller_ops;
2390 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2391 "magic 0x%x\n", oap, oap->oap_magic);
2394 /* pin object in memory, so that completion call-backs
2395 * can be safely called under client_obd_list lock. */
2396 clob = osc_oap2cl_page(oap)->cp_obj;
2397 cl_object_get(clob);
2400 if (page_count != 0 &&
2401 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2402 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2403 " oap %p, page %p, srvlock %u\n",
2404 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2408 /* If there is a gap at the start of this page, it can't merge
2409 * with any previous page, so we'll hand the network a
2410 * "fragmented" page array that it can't transfer in 1 RDMA */
2411 if (page_count != 0 && oap->oap_page_off != 0)
2414 /* in llite being 'ready' equates to the page being locked
2415 * until completion unlocks it. commit_write submits a page
2416 * as not ready because its unlock will happen unconditionally
2417 * as the call returns. if we race with commit_write giving
2418 * us that page we dont' want to create a hole in the page
2419 * stream, so we stop and leave the rpc to be fired by
2420 * another dirtier or kupdated interval (the not ready page
2421 * will still be on the dirty list). we could call in
2422 * at the end of ll_file_write to process the queue again. */
2423 if (!(oap->oap_async_flags & ASYNC_READY)) {
2424 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2427 CDEBUG(D_INODE, "oap %p page %p returned %d "
2428 "instead of ready\n", oap,
2432 /* llite is telling us that the page is still
2433 * in commit_write and that we should try
2434 * and put it in an rpc again later. we
2435 * break out of the loop so we don't create
2436 * a hole in the sequence of pages in the rpc
2441 /* the io isn't needed.. tell the checks
2442 * below to complete the rpc with EINTR */
2443 cfs_spin_lock(&oap->oap_lock);
2444 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2445 cfs_spin_unlock(&oap->oap_lock);
2446 oap->oap_count = -EINTR;
2449 cfs_spin_lock(&oap->oap_lock);
2450 oap->oap_async_flags |= ASYNC_READY;
2451 cfs_spin_unlock(&oap->oap_lock);
2454 LASSERTF(0, "oap %p page %p returned %d "
2455 "from make_ready\n", oap,
2463 * Page submitted for IO has to be locked. Either by
2464 * ->ap_make_ready() or by higher layers.
2466 #if defined(__KERNEL__) && defined(__linux__)
2468 struct cl_page *page;
2470 page = osc_oap2cl_page(oap);
2472 if (page->cp_type == CPT_CACHEABLE &&
2473 !(PageLocked(oap->oap_page) &&
2474 (CheckWriteback(oap->oap_page, cmd)))) {
2475 CDEBUG(D_PAGE, "page %p lost wb %lx/%x\n",
2477 (long)oap->oap_page->flags,
2478 oap->oap_async_flags);
2484 /* take the page out of our book-keeping */
2485 cfs_list_del_init(&oap->oap_pending_item);
2486 lop_update_pending(cli, lop, cmd, -1);
2487 cfs_list_del_init(&oap->oap_urgent_item);
2489 if (page_count == 0)
2490 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2491 (PTLRPC_MAX_BRW_SIZE - 1);
2493 /* ask the caller for the size of the io as the rpc leaves. */
2494 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2496 ops->ap_refresh_count(env, oap->oap_caller_data,
2498 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2500 if (oap->oap_count <= 0) {
2501 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2503 osc_ap_completion(env, cli, NULL,
2504 oap, 0, oap->oap_count);
2508 /* now put the page back in our accounting */
2509 cfs_list_add_tail(&oap->oap_rpc_item, &rpc_list);
2510 if (page_count == 0)
2511 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2512 if (++page_count >= cli->cl_max_pages_per_rpc)
2515 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2516 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2517 * have the same alignment as the initial writes that allocated
2518 * extents on the server. */
2519 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2520 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2521 if (ending_offset == 0)
2524 /* If there is a gap at the end of this page, it can't merge
2525 * with any subsequent pages, so we'll hand the network a
2526 * "fragmented" page array that it can't transfer in 1 RDMA */
2527 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2531 osc_wake_cache_waiters(cli);
2533 loi_list_maint(cli, loi);
2535 client_obd_list_unlock(&cli->cl_loi_list_lock);
2538 cl_object_put(env, clob);
2540 if (page_count == 0) {
2541 client_obd_list_lock(&cli->cl_loi_list_lock);
2545 req = osc_build_req(env, cli, &rpc_list, page_count, cmd);
2547 LASSERT(cfs_list_empty(&rpc_list));
2548 loi_list_maint(cli, loi);
2549 RETURN(PTR_ERR(req));
2552 aa = ptlrpc_req_async_args(req);
2554 if (cmd == OBD_BRW_READ) {
2555 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2556 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2557 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2558 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2560 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2561 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2562 cli->cl_w_in_flight);
2563 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2564 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2566 ptlrpc_lprocfs_brw(req, aa->aa_requested_nob);
2568 client_obd_list_lock(&cli->cl_loi_list_lock);
2570 if (cmd == OBD_BRW_READ)
2571 cli->cl_r_in_flight++;
2573 cli->cl_w_in_flight++;
2575 /* queued sync pages can be torn down while the pages
2576 * were between the pending list and the rpc */
2578 cfs_list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2579 /* only one oap gets a request reference */
2582 if (oap->oap_interrupted && !req->rq_intr) {
2583 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2585 ptlrpc_mark_interrupted(req);
2589 tmp->oap_request = ptlrpc_request_addref(req);
2591 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2592 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2594 req->rq_interpret_reply = brw_interpret;
2595 ptlrpcd_add_req(req, PSCOPE_BRW);
2599 #define LOI_DEBUG(LOI, STR, args...) \
2600 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2601 !cfs_list_empty(&(LOI)->loi_ready_item) || \
2602 !cfs_list_empty(&(LOI)->loi_hp_ready_item), \
2603 (LOI)->loi_write_lop.lop_num_pending, \
2604 !cfs_list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2605 (LOI)->loi_read_lop.lop_num_pending, \
2606 !cfs_list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2609 /* This is called by osc_check_rpcs() to find which objects have pages that
2610 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2611 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2615 /* First return objects that have blocked locks so that they
2616 * will be flushed quickly and other clients can get the lock,
2617 * then objects which have pages ready to be stuffed into RPCs */
2618 if (!cfs_list_empty(&cli->cl_loi_hp_ready_list))
2619 RETURN(cfs_list_entry(cli->cl_loi_hp_ready_list.next,
2620 struct lov_oinfo, loi_hp_ready_item));
2621 if (!cfs_list_empty(&cli->cl_loi_ready_list))
2622 RETURN(cfs_list_entry(cli->cl_loi_ready_list.next,
2623 struct lov_oinfo, loi_ready_item));
2625 /* then if we have cache waiters, return all objects with queued
2626 * writes. This is especially important when many small files
2627 * have filled up the cache and not been fired into rpcs because
2628 * they don't pass the nr_pending/object threshhold */
2629 if (!cfs_list_empty(&cli->cl_cache_waiters) &&
2630 !cfs_list_empty(&cli->cl_loi_write_list))
2631 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2632 struct lov_oinfo, loi_write_item));
2634 /* then return all queued objects when we have an invalid import
2635 * so that they get flushed */
2636 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2637 if (!cfs_list_empty(&cli->cl_loi_write_list))
2638 RETURN(cfs_list_entry(cli->cl_loi_write_list.next,
2641 if (!cfs_list_empty(&cli->cl_loi_read_list))
2642 RETURN(cfs_list_entry(cli->cl_loi_read_list.next,
2643 struct lov_oinfo, loi_read_item));
2648 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2650 struct osc_async_page *oap;
2653 if (!cfs_list_empty(&loi->loi_write_lop.lop_urgent)) {
2654 oap = cfs_list_entry(loi->loi_write_lop.lop_urgent.next,
2655 struct osc_async_page, oap_urgent_item);
2656 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2659 if (!hprpc && !cfs_list_empty(&loi->loi_read_lop.lop_urgent)) {
2660 oap = cfs_list_entry(loi->loi_read_lop.lop_urgent.next,
2661 struct osc_async_page, oap_urgent_item);
2662 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2665 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2668 /* called with the loi list lock held */
2669 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2671 struct lov_oinfo *loi;
2672 int rc = 0, race_counter = 0;
2675 while ((loi = osc_next_loi(cli)) != NULL) {
2676 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2678 if (osc_max_rpc_in_flight(cli, loi))
2681 /* attempt some read/write balancing by alternating between
2682 * reads and writes in an object. The makes_rpc checks here
2683 * would be redundant if we were getting read/write work items
2684 * instead of objects. we don't want send_oap_rpc to drain a
2685 * partial read pending queue when we're given this object to
2686 * do io on writes while there are cache waiters */
2687 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2688 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2689 &loi->loi_write_lop);
2691 CERROR("Write request failed with %d\n", rc);
2693 /* osc_send_oap_rpc failed, mostly because of
2696 * It can't break here, because if:
2697 * - a page was submitted by osc_io_submit, so
2699 * - no request in flight
2700 * - no subsequent request
2701 * The system will be in live-lock state,
2702 * because there is no chance to call
2703 * osc_io_unplug() and osc_check_rpcs() any
2704 * more. pdflush can't help in this case,
2705 * because it might be blocked at grabbing
2706 * the page lock as we mentioned.
2708 * Anyway, continue to drain pages. */
2717 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2718 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2719 &loi->loi_read_lop);
2721 CERROR("Read request failed with %d\n", rc);
2729 /* attempt some inter-object balancing by issueing rpcs
2730 * for each object in turn */
2731 if (!cfs_list_empty(&loi->loi_hp_ready_item))
2732 cfs_list_del_init(&loi->loi_hp_ready_item);
2733 if (!cfs_list_empty(&loi->loi_ready_item))
2734 cfs_list_del_init(&loi->loi_ready_item);
2735 if (!cfs_list_empty(&loi->loi_write_item))
2736 cfs_list_del_init(&loi->loi_write_item);
2737 if (!cfs_list_empty(&loi->loi_read_item))
2738 cfs_list_del_init(&loi->loi_read_item);
2740 loi_list_maint(cli, loi);
2742 /* send_oap_rpc fails with 0 when make_ready tells it to
2743 * back off. llite's make_ready does this when it tries
2744 * to lock a page queued for write that is already locked.
2745 * we want to try sending rpcs from many objects, but we
2746 * don't want to spin failing with 0. */
2747 if (race_counter == 10)
2753 /* we're trying to queue a page in the osc so we're subject to the
2754 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2755 * If the osc's queued pages are already at that limit, then we want to sleep
2756 * until there is space in the osc's queue for us. We also may be waiting for
2757 * write credits from the OST if there are RPCs in flight that may return some
2758 * before we fall back to sync writes.
2760 * We need this know our allocation was granted in the presence of signals */
2761 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2765 client_obd_list_lock(&cli->cl_loi_list_lock);
2766 rc = cfs_list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2767 client_obd_list_unlock(&cli->cl_loi_list_lock);
2772 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2775 int osc_enter_cache_try(const struct lu_env *env,
2776 struct client_obd *cli, struct lov_oinfo *loi,
2777 struct osc_async_page *oap, int transient)
2781 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2783 osc_consume_write_grant(cli, &oap->oap_brw_page);
2785 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2786 cfs_atomic_inc(&obd_dirty_transit_pages);
2787 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2793 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2794 * grant or cache space. */
2795 static int osc_enter_cache(const struct lu_env *env,
2796 struct client_obd *cli, struct lov_oinfo *loi,
2797 struct osc_async_page *oap)
2799 struct osc_cache_waiter ocw;
2800 struct l_wait_info lwi = { 0 };
2804 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2805 "grant: %lu\n", cli->cl_dirty, cfs_atomic_read(&obd_dirty_pages),
2806 cli->cl_dirty_max, obd_max_dirty_pages,
2807 cli->cl_lost_grant, cli->cl_avail_grant);
2809 /* force the caller to try sync io. this can jump the list
2810 * of queued writes and create a discontiguous rpc stream */
2811 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2812 loi->loi_ar.ar_force_sync)
2815 /* Hopefully normal case - cache space and write credits available */
2816 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2817 cfs_atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2818 osc_enter_cache_try(env, cli, loi, oap, 0))
2821 /* Make sure that there are write rpcs in flight to wait for. This
2822 * is a little silly as this object may not have any pending but
2823 * other objects sure might. */
2824 if (cli->cl_w_in_flight) {
2825 cfs_list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2826 cfs_waitq_init(&ocw.ocw_waitq);
2830 loi_list_maint(cli, loi);
2831 osc_check_rpcs(env, cli);
2832 client_obd_list_unlock(&cli->cl_loi_list_lock);
2834 CDEBUG(D_CACHE, "sleeping for cache space\n");
2835 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2837 client_obd_list_lock(&cli->cl_loi_list_lock);
2838 if (!cfs_list_empty(&ocw.ocw_entry)) {
2839 cfs_list_del(&ocw.ocw_entry);
2849 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2850 struct lov_oinfo *loi, cfs_page_t *page,
2851 obd_off offset, const struct obd_async_page_ops *ops,
2852 void *data, void **res, int nocache,
2853 struct lustre_handle *lockh)
2855 struct osc_async_page *oap;
2860 return cfs_size_round(sizeof(*oap));
2863 oap->oap_magic = OAP_MAGIC;
2864 oap->oap_cli = &exp->exp_obd->u.cli;
2867 oap->oap_caller_ops = ops;
2868 oap->oap_caller_data = data;
2870 oap->oap_page = page;
2871 oap->oap_obj_off = offset;
2872 if (!client_is_remote(exp) &&
2873 cfs_capable(CFS_CAP_SYS_RESOURCE))
2874 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2876 LASSERT(!(offset & ~CFS_PAGE_MASK));
2878 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2879 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2880 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2881 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2883 cfs_spin_lock_init(&oap->oap_lock);
2884 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2888 struct osc_async_page *oap_from_cookie(void *cookie)
2890 struct osc_async_page *oap = cookie;
2891 if (oap->oap_magic != OAP_MAGIC)
2892 return ERR_PTR(-EINVAL);
2896 int osc_queue_async_io(const struct lu_env *env,
2897 struct obd_export *exp, struct lov_stripe_md *lsm,
2898 struct lov_oinfo *loi, void *cookie,
2899 int cmd, obd_off off, int count,
2900 obd_flag brw_flags, enum async_flags async_flags)
2902 struct client_obd *cli = &exp->exp_obd->u.cli;
2903 struct osc_async_page *oap;
2907 oap = oap_from_cookie(cookie);
2909 RETURN(PTR_ERR(oap));
2911 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2914 if (!cfs_list_empty(&oap->oap_pending_item) ||
2915 !cfs_list_empty(&oap->oap_urgent_item) ||
2916 !cfs_list_empty(&oap->oap_rpc_item))
2919 /* check if the file's owner/group is over quota */
2920 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
2921 struct cl_object *obj;
2922 struct cl_attr attr; /* XXX put attr into thread info */
2923 unsigned int qid[MAXQUOTAS];
2925 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
2927 cl_object_attr_lock(obj);
2928 rc = cl_object_attr_get(env, obj, &attr);
2929 cl_object_attr_unlock(obj);
2931 qid[USRQUOTA] = attr.cat_uid;
2932 qid[GRPQUOTA] = attr.cat_gid;
2934 lquota_chkdq(quota_interface, cli, qid) == NO_QUOTA)
2941 loi = lsm->lsm_oinfo[0];
2943 client_obd_list_lock(&cli->cl_loi_list_lock);
2945 LASSERT(off + count <= CFS_PAGE_SIZE);
2947 oap->oap_page_off = off;
2948 oap->oap_count = count;
2949 oap->oap_brw_flags = brw_flags;
2950 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
2951 if (libcfs_memory_pressure_get())
2952 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2953 cfs_spin_lock(&oap->oap_lock);
2954 oap->oap_async_flags = async_flags;
2955 cfs_spin_unlock(&oap->oap_lock);
2957 if (cmd & OBD_BRW_WRITE) {
2958 rc = osc_enter_cache(env, cli, loi, oap);
2960 client_obd_list_unlock(&cli->cl_loi_list_lock);
2965 osc_oap_to_pending(oap);
2966 loi_list_maint(cli, loi);
2968 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2971 osc_check_rpcs(env, cli);
2972 client_obd_list_unlock(&cli->cl_loi_list_lock);
2977 /* aka (~was & now & flag), but this is more clear :) */
2978 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2980 int osc_set_async_flags_base(struct client_obd *cli,
2981 struct lov_oinfo *loi, struct osc_async_page *oap,
2982 obd_flag async_flags)
2984 struct loi_oap_pages *lop;
2988 LASSERT(!cfs_list_empty(&oap->oap_pending_item));
2990 if (oap->oap_cmd & OBD_BRW_WRITE) {
2991 lop = &loi->loi_write_lop;
2993 lop = &loi->loi_read_lop;
2996 if ((oap->oap_async_flags & async_flags) == async_flags)
2999 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
3000 flags |= ASYNC_READY;
3002 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
3003 cfs_list_empty(&oap->oap_rpc_item)) {
3004 if (oap->oap_async_flags & ASYNC_HP)
3005 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
3007 cfs_list_add_tail(&oap->oap_urgent_item,
3009 flags |= ASYNC_URGENT;
3010 loi_list_maint(cli, loi);
3012 cfs_spin_lock(&oap->oap_lock);
3013 oap->oap_async_flags |= flags;
3014 cfs_spin_unlock(&oap->oap_lock);
3016 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
3017 oap->oap_async_flags);
3021 int osc_teardown_async_page(struct obd_export *exp,
3022 struct lov_stripe_md *lsm,
3023 struct lov_oinfo *loi, void *cookie)
3025 struct client_obd *cli = &exp->exp_obd->u.cli;
3026 struct loi_oap_pages *lop;
3027 struct osc_async_page *oap;
3031 oap = oap_from_cookie(cookie);
3033 RETURN(PTR_ERR(oap));
3036 loi = lsm->lsm_oinfo[0];
3038 if (oap->oap_cmd & OBD_BRW_WRITE) {
3039 lop = &loi->loi_write_lop;
3041 lop = &loi->loi_read_lop;
3044 client_obd_list_lock(&cli->cl_loi_list_lock);
3046 if (!cfs_list_empty(&oap->oap_rpc_item))
3047 GOTO(out, rc = -EBUSY);
3049 osc_exit_cache(cli, oap, 0);
3050 osc_wake_cache_waiters(cli);
3052 if (!cfs_list_empty(&oap->oap_urgent_item)) {
3053 cfs_list_del_init(&oap->oap_urgent_item);
3054 cfs_spin_lock(&oap->oap_lock);
3055 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3056 cfs_spin_unlock(&oap->oap_lock);
3058 if (!cfs_list_empty(&oap->oap_pending_item)) {
3059 cfs_list_del_init(&oap->oap_pending_item);
3060 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3062 loi_list_maint(cli, loi);
3063 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3065 client_obd_list_unlock(&cli->cl_loi_list_lock);
3069 static void osc_set_lock_data_with_check(struct ldlm_lock *lock,
3070 struct ldlm_enqueue_info *einfo,
3073 void *data = einfo->ei_cbdata;
3075 LASSERT(lock != NULL);
3076 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3077 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3078 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3079 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3081 lock_res_and_lock(lock);
3082 cfs_spin_lock(&osc_ast_guard);
3083 LASSERT(lock->l_ast_data == NULL || lock->l_ast_data == data);
3084 lock->l_ast_data = data;
3085 cfs_spin_unlock(&osc_ast_guard);
3086 unlock_res_and_lock(lock);
3089 static void osc_set_data_with_check(struct lustre_handle *lockh,
3090 struct ldlm_enqueue_info *einfo,
3093 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3096 osc_set_lock_data_with_check(lock, einfo, flags);
3097 LDLM_LOCK_PUT(lock);
3099 CERROR("lockh %p, data %p - client evicted?\n",
3100 lockh, einfo->ei_cbdata);
3103 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3104 ldlm_iterator_t replace, void *data)
3106 struct ldlm_res_id res_id;
3107 struct obd_device *obd = class_exp2obd(exp);
3109 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_gr, &res_id);
3110 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3114 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3115 obd_enqueue_update_f upcall, void *cookie,
3118 int intent = *flags & LDLM_FL_HAS_INTENT;
3122 /* The request was created before ldlm_cli_enqueue call. */
3123 if (rc == ELDLM_LOCK_ABORTED) {
3124 struct ldlm_reply *rep;
3125 rep = req_capsule_server_get(&req->rq_pill,
3128 LASSERT(rep != NULL);
3129 if (rep->lock_policy_res1)
3130 rc = rep->lock_policy_res1;
3134 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3135 *flags |= LDLM_FL_LVB_READY;
3136 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3137 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3140 /* Call the update callback. */
3141 rc = (*upcall)(cookie, rc);
3145 static int osc_enqueue_interpret(const struct lu_env *env,
3146 struct ptlrpc_request *req,
3147 struct osc_enqueue_args *aa, int rc)
3149 struct ldlm_lock *lock;
3150 struct lustre_handle handle;
3153 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3154 * might be freed anytime after lock upcall has been called. */
3155 lustre_handle_copy(&handle, aa->oa_lockh);
3156 mode = aa->oa_ei->ei_mode;
3158 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3160 lock = ldlm_handle2lock(&handle);
3162 /* Take an additional reference so that a blocking AST that
3163 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3164 * to arrive after an upcall has been executed by
3165 * osc_enqueue_fini(). */
3166 ldlm_lock_addref(&handle, mode);
3168 /* Complete obtaining the lock procedure. */
3169 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3170 mode, aa->oa_flags, aa->oa_lvb,
3171 sizeof(*aa->oa_lvb), &handle, rc);
3172 /* Complete osc stuff. */
3173 rc = osc_enqueue_fini(req, aa->oa_lvb,
3174 aa->oa_upcall, aa->oa_cookie, aa->oa_flags, rc);
3176 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3178 /* Release the lock for async request. */
3179 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3181 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3182 * not already released by
3183 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3185 ldlm_lock_decref(&handle, mode);
3187 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3188 aa->oa_lockh, req, aa);
3189 ldlm_lock_decref(&handle, mode);
3190 LDLM_LOCK_PUT(lock);
3194 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3195 struct lov_oinfo *loi, int flags,
3196 struct ost_lvb *lvb, __u32 mode, int rc)
3198 if (rc == ELDLM_OK) {
3199 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3202 LASSERT(lock != NULL);
3203 loi->loi_lvb = *lvb;
3204 tmp = loi->loi_lvb.lvb_size;
3205 /* Extend KMS up to the end of this lock and no further
3206 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3207 if (tmp > lock->l_policy_data.l_extent.end)
3208 tmp = lock->l_policy_data.l_extent.end + 1;
3209 if (tmp >= loi->loi_kms) {
3210 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3211 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3212 loi_kms_set(loi, tmp);
3214 LDLM_DEBUG(lock, "lock acquired, setting rss="
3215 LPU64"; leaving kms="LPU64", end="LPU64,
3216 loi->loi_lvb.lvb_size, loi->loi_kms,
3217 lock->l_policy_data.l_extent.end);
3219 ldlm_lock_allow_match(lock);
3220 LDLM_LOCK_PUT(lock);
3221 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3222 loi->loi_lvb = *lvb;
3223 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3224 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3228 EXPORT_SYMBOL(osc_update_enqueue);
3230 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3232 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3233 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3234 * other synchronous requests, however keeping some locks and trying to obtain
3235 * others may take a considerable amount of time in a case of ost failure; and
3236 * when other sync requests do not get released lock from a client, the client
3237 * is excluded from the cluster -- such scenarious make the life difficult, so
3238 * release locks just after they are obtained. */
3239 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3240 int *flags, ldlm_policy_data_t *policy,
3241 struct ost_lvb *lvb, int kms_valid,
3242 obd_enqueue_update_f upcall, void *cookie,
3243 struct ldlm_enqueue_info *einfo,
3244 struct lustre_handle *lockh,
3245 struct ptlrpc_request_set *rqset, int async)
3247 struct obd_device *obd = exp->exp_obd;
3248 struct ptlrpc_request *req = NULL;
3249 int intent = *flags & LDLM_FL_HAS_INTENT;
3254 /* Filesystem lock extents are extended to page boundaries so that
3255 * dealing with the page cache is a little smoother. */
3256 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3257 policy->l_extent.end |= ~CFS_PAGE_MASK;
3260 * kms is not valid when either object is completely fresh (so that no
3261 * locks are cached), or object was evicted. In the latter case cached
3262 * lock cannot be used, because it would prime inode state with
3263 * potentially stale LVB.
3268 /* Next, search for already existing extent locks that will cover us */
3269 /* If we're trying to read, we also search for an existing PW lock. The
3270 * VFS and page cache already protect us locally, so lots of readers/
3271 * writers can share a single PW lock.
3273 * There are problems with conversion deadlocks, so instead of
3274 * converting a read lock to a write lock, we'll just enqueue a new
3277 * At some point we should cancel the read lock instead of making them
3278 * send us a blocking callback, but there are problems with canceling
3279 * locks out from other users right now, too. */
3280 mode = einfo->ei_mode;
3281 if (einfo->ei_mode == LCK_PR)
3283 mode = ldlm_lock_match(obd->obd_namespace,
3284 *flags | LDLM_FL_LVB_READY, res_id,
3285 einfo->ei_type, policy, mode, lockh, 0);
3287 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3289 if (matched->l_ast_data == NULL ||
3290 matched->l_ast_data == einfo->ei_cbdata) {
3291 /* addref the lock only if not async requests and PW
3292 * lock is matched whereas we asked for PR. */
3293 if (!rqset && einfo->ei_mode != mode)
3294 ldlm_lock_addref(lockh, LCK_PR);
3295 osc_set_lock_data_with_check(matched, einfo, *flags);
3297 /* I would like to be able to ASSERT here that
3298 * rss <= kms, but I can't, for reasons which
3299 * are explained in lov_enqueue() */
3302 /* We already have a lock, and it's referenced */
3303 (*upcall)(cookie, ELDLM_OK);
3305 /* For async requests, decref the lock. */
3306 if (einfo->ei_mode != mode)
3307 ldlm_lock_decref(lockh, LCK_PW);
3309 ldlm_lock_decref(lockh, einfo->ei_mode);
3310 LDLM_LOCK_PUT(matched);
3313 ldlm_lock_decref(lockh, mode);
3314 LDLM_LOCK_PUT(matched);
3319 CFS_LIST_HEAD(cancels);
3320 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3321 &RQF_LDLM_ENQUEUE_LVB);
3325 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3329 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3331 ptlrpc_request_set_replen(req);
3334 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3335 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3337 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3338 sizeof(*lvb), lockh, async);
3341 struct osc_enqueue_args *aa;
3342 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3343 aa = ptlrpc_req_async_args(req);
3346 aa->oa_flags = flags;
3347 aa->oa_upcall = upcall;
3348 aa->oa_cookie = cookie;
3350 aa->oa_lockh = lockh;
3352 req->rq_interpret_reply =
3353 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3354 if (rqset == PTLRPCD_SET)
3355 ptlrpcd_add_req(req, PSCOPE_OTHER);
3357 ptlrpc_set_add_req(rqset, req);
3358 } else if (intent) {
3359 ptlrpc_req_finished(req);
3364 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, rc);
3366 ptlrpc_req_finished(req);
3371 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3372 struct ldlm_enqueue_info *einfo,
3373 struct ptlrpc_request_set *rqset)
3375 struct ldlm_res_id res_id;
3379 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3380 oinfo->oi_md->lsm_object_gr, &res_id);
3382 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3383 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3384 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3385 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3386 rqset, rqset != NULL);
3390 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3391 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3392 int *flags, void *data, struct lustre_handle *lockh,
3395 struct obd_device *obd = exp->exp_obd;
3396 int lflags = *flags;
3400 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3403 /* Filesystem lock extents are extended to page boundaries so that
3404 * dealing with the page cache is a little smoother */
3405 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3406 policy->l_extent.end |= ~CFS_PAGE_MASK;
3408 /* Next, search for already existing extent locks that will cover us */
3409 /* If we're trying to read, we also search for an existing PW lock. The
3410 * VFS and page cache already protect us locally, so lots of readers/
3411 * writers can share a single PW lock. */
3415 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3416 res_id, type, policy, rc, lockh, unref);
3419 osc_set_data_with_check(lockh, data, lflags);
3420 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3421 ldlm_lock_addref(lockh, LCK_PR);
3422 ldlm_lock_decref(lockh, LCK_PW);
3429 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3433 if (unlikely(mode == LCK_GROUP))
3434 ldlm_lock_decref_and_cancel(lockh, mode);
3436 ldlm_lock_decref(lockh, mode);
3441 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3442 __u32 mode, struct lustre_handle *lockh)
3445 RETURN(osc_cancel_base(lockh, mode));
3448 static int osc_cancel_unused(struct obd_export *exp,
3449 struct lov_stripe_md *lsm, int flags,
3452 struct obd_device *obd = class_exp2obd(exp);
3453 struct ldlm_res_id res_id, *resp = NULL;
3456 resp = osc_build_res_name(lsm->lsm_object_id,
3457 lsm->lsm_object_gr, &res_id);
3460 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3463 static int osc_statfs_interpret(const struct lu_env *env,
3464 struct ptlrpc_request *req,
3465 struct osc_async_args *aa, int rc)
3467 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3468 struct obd_statfs *msfs;
3473 /* The request has in fact never been sent
3474 * due to issues at a higher level (LOV).
3475 * Exit immediately since the caller is
3476 * aware of the problem and takes care
3477 * of the clean up */
3480 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3481 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3487 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3489 GOTO(out, rc = -EPROTO);
3492 /* Reinitialize the RDONLY and DEGRADED flags at the client
3493 * on each statfs, so they don't stay set permanently. */
3494 cfs_spin_lock(&cli->cl_oscc.oscc_lock);
3496 if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
3497 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3498 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
3499 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
3501 if (unlikely(msfs->os_state & OS_STATE_READONLY))
3502 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3503 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
3504 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
3506 /* Add a bit of hysteresis so this flag isn't continually flapping,
3507 * and ensure that new files don't get extremely fragmented due to
3508 * only a small amount of available space in the filesystem.
3509 * We want to set the NOSPC flag when there is less than ~0.1% free
3510 * and clear it when there is at least ~0.2% free space, so:
3511 * avail < ~0.1% max max = avail + used
3512 * 1025 * avail < avail + used used = blocks - free
3513 * 1024 * avail < used
3514 * 1024 * avail < blocks - free
3515 * avail < ((blocks - free) >> 10)
3517 * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
3518 * lose that amount of space so in those cases we report no space left
3519 * if their is less than 1 GB left. */
3520 used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
3521 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
3522 ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
3523 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
3524 else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3525 (msfs->os_ffree > 64) && (msfs->os_bavail > (used << 1))))
3526 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_NOSPC;
3528 cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
3530 *aa->aa_oi->oi_osfs = *msfs;
3532 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3536 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3537 __u64 max_age, struct ptlrpc_request_set *rqset)
3539 struct ptlrpc_request *req;
3540 struct osc_async_args *aa;
3544 /* We could possibly pass max_age in the request (as an absolute
3545 * timestamp or a "seconds.usec ago") so the target can avoid doing
3546 * extra calls into the filesystem if that isn't necessary (e.g.
3547 * during mount that would help a bit). Having relative timestamps
3548 * is not so great if request processing is slow, while absolute
3549 * timestamps are not ideal because they need time synchronization. */
3550 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3554 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3556 ptlrpc_request_free(req);
3559 ptlrpc_request_set_replen(req);
3560 req->rq_request_portal = OST_CREATE_PORTAL;
3561 ptlrpc_at_set_req_timeout(req);
3563 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3564 /* procfs requests not want stat in wait for avoid deadlock */
3565 req->rq_no_resend = 1;
3566 req->rq_no_delay = 1;
3569 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3570 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3571 aa = ptlrpc_req_async_args(req);
3574 ptlrpc_set_add_req(rqset, req);
3578 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3579 __u64 max_age, __u32 flags)
3581 struct obd_statfs *msfs;
3582 struct ptlrpc_request *req;
3583 struct obd_import *imp = NULL;
3587 /*Since the request might also come from lprocfs, so we need
3588 *sync this with client_disconnect_export Bug15684*/
3589 cfs_down_read(&obd->u.cli.cl_sem);
3590 if (obd->u.cli.cl_import)
3591 imp = class_import_get(obd->u.cli.cl_import);
3592 cfs_up_read(&obd->u.cli.cl_sem);
3596 /* We could possibly pass max_age in the request (as an absolute
3597 * timestamp or a "seconds.usec ago") so the target can avoid doing
3598 * extra calls into the filesystem if that isn't necessary (e.g.
3599 * during mount that would help a bit). Having relative timestamps
3600 * is not so great if request processing is slow, while absolute
3601 * timestamps are not ideal because they need time synchronization. */
3602 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3604 class_import_put(imp);
3609 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3611 ptlrpc_request_free(req);
3614 ptlrpc_request_set_replen(req);
3615 req->rq_request_portal = OST_CREATE_PORTAL;
3616 ptlrpc_at_set_req_timeout(req);
3618 if (flags & OBD_STATFS_NODELAY) {
3619 /* procfs requests not want stat in wait for avoid deadlock */
3620 req->rq_no_resend = 1;
3621 req->rq_no_delay = 1;
3624 rc = ptlrpc_queue_wait(req);
3628 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3630 GOTO(out, rc = -EPROTO);
3637 ptlrpc_req_finished(req);
3641 /* Retrieve object striping information.
3643 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3644 * the maximum number of OST indices which will fit in the user buffer.
3645 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3647 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3649 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3650 struct lov_user_md_v3 lum, *lumk;
3651 struct lov_user_ost_data_v1 *lmm_objects;
3652 int rc = 0, lum_size;
3658 /* we only need the header part from user space to get lmm_magic and
3659 * lmm_stripe_count, (the header part is common to v1 and v3) */
3660 lum_size = sizeof(struct lov_user_md_v1);
3661 if (cfs_copy_from_user(&lum, lump, lum_size))
3664 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3665 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3668 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3669 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3670 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3671 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3673 /* we can use lov_mds_md_size() to compute lum_size
3674 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3675 if (lum.lmm_stripe_count > 0) {
3676 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3677 OBD_ALLOC(lumk, lum_size);
3681 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3682 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3684 lmm_objects = &(lumk->lmm_objects[0]);
3685 lmm_objects->l_object_id = lsm->lsm_object_id;
3687 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3691 lumk->lmm_object_id = lsm->lsm_object_id;
3692 lumk->lmm_object_gr = lsm->lsm_object_gr;
3693 lumk->lmm_stripe_count = 1;
3695 if (cfs_copy_to_user(lump, lumk, lum_size))
3699 OBD_FREE(lumk, lum_size);
3705 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3706 void *karg, void *uarg)
3708 struct obd_device *obd = exp->exp_obd;
3709 struct obd_ioctl_data *data = karg;
3713 if (!cfs_try_module_get(THIS_MODULE)) {
3714 CERROR("Can't get module. Is it alive?");
3718 case OBD_IOC_LOV_GET_CONFIG: {
3720 struct lov_desc *desc;
3721 struct obd_uuid uuid;
3725 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3726 GOTO(out, err = -EINVAL);
3728 data = (struct obd_ioctl_data *)buf;
3730 if (sizeof(*desc) > data->ioc_inllen1) {
3731 obd_ioctl_freedata(buf, len);
3732 GOTO(out, err = -EINVAL);
3735 if (data->ioc_inllen2 < sizeof(uuid)) {
3736 obd_ioctl_freedata(buf, len);
3737 GOTO(out, err = -EINVAL);
3740 desc = (struct lov_desc *)data->ioc_inlbuf1;
3741 desc->ld_tgt_count = 1;
3742 desc->ld_active_tgt_count = 1;
3743 desc->ld_default_stripe_count = 1;
3744 desc->ld_default_stripe_size = 0;
3745 desc->ld_default_stripe_offset = 0;
3746 desc->ld_pattern = 0;
3747 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3749 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3751 err = cfs_copy_to_user((void *)uarg, buf, len);
3754 obd_ioctl_freedata(buf, len);
3757 case LL_IOC_LOV_SETSTRIPE:
3758 err = obd_alloc_memmd(exp, karg);
3762 case LL_IOC_LOV_GETSTRIPE:
3763 err = osc_getstripe(karg, uarg);
3765 case OBD_IOC_CLIENT_RECOVER:
3766 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3771 case IOC_OSC_SET_ACTIVE:
3772 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3775 case OBD_IOC_POLL_QUOTACHECK:
3776 err = lquota_poll_check(quota_interface, exp,
3777 (struct if_quotacheck *)karg);
3779 case OBD_IOC_PING_TARGET:
3780 err = ptlrpc_obd_ping(obd);
3783 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3784 cmd, cfs_curproc_comm());
3785 GOTO(out, err = -ENOTTY);
3788 cfs_module_put(THIS_MODULE);
3792 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3793 void *key, __u32 *vallen, void *val,
3794 struct lov_stripe_md *lsm)
3797 if (!vallen || !val)
3800 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3801 __u32 *stripe = val;
3802 *vallen = sizeof(*stripe);
3805 } else if (KEY_IS(KEY_LAST_ID)) {
3806 struct ptlrpc_request *req;
3811 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3812 &RQF_OST_GET_INFO_LAST_ID);
3816 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3817 RCL_CLIENT, keylen);
3818 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3820 ptlrpc_request_free(req);
3824 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3825 memcpy(tmp, key, keylen);
3827 req->rq_no_delay = req->rq_no_resend = 1;
3828 ptlrpc_request_set_replen(req);
3829 rc = ptlrpc_queue_wait(req);
3833 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3835 GOTO(out, rc = -EPROTO);
3837 *((obd_id *)val) = *reply;
3839 ptlrpc_req_finished(req);
3841 } else if (KEY_IS(KEY_FIEMAP)) {
3842 struct ptlrpc_request *req;
3843 struct ll_user_fiemap *reply;
3847 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3848 &RQF_OST_GET_INFO_FIEMAP);
3852 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3853 RCL_CLIENT, keylen);
3854 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3855 RCL_CLIENT, *vallen);
3856 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3857 RCL_SERVER, *vallen);
3859 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3861 ptlrpc_request_free(req);
3865 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3866 memcpy(tmp, key, keylen);
3867 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3868 memcpy(tmp, val, *vallen);
3870 ptlrpc_request_set_replen(req);
3871 rc = ptlrpc_queue_wait(req);
3875 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3877 GOTO(out1, rc = -EPROTO);
3879 memcpy(val, reply, *vallen);
3881 ptlrpc_req_finished(req);
3889 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
3891 struct llog_ctxt *ctxt;
3895 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3897 rc = llog_initiator_connect(ctxt);
3898 llog_ctxt_put(ctxt);
3900 /* XXX return an error? skip setting below flags? */
3903 cfs_spin_lock(&imp->imp_lock);
3904 imp->imp_server_timeout = 1;
3905 imp->imp_pingable = 1;
3906 cfs_spin_unlock(&imp->imp_lock);
3907 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3912 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
3913 struct ptlrpc_request *req,
3920 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
3923 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3924 void *key, obd_count vallen, void *val,
3925 struct ptlrpc_request_set *set)
3927 struct ptlrpc_request *req;
3928 struct obd_device *obd = exp->exp_obd;
3929 struct obd_import *imp = class_exp2cliimp(exp);
3934 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3936 if (KEY_IS(KEY_NEXT_ID)) {
3938 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3940 if (vallen != sizeof(obd_id))
3945 if (vallen != sizeof(obd_id))
3948 /* avoid race between allocate new object and set next id
3949 * from ll_sync thread */
3950 cfs_spin_lock(&oscc->oscc_lock);
3951 new_val = *((obd_id*)val) + 1;
3952 if (new_val > oscc->oscc_next_id)
3953 oscc->oscc_next_id = new_val;
3954 cfs_spin_unlock(&oscc->oscc_lock);
3955 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3956 exp->exp_obd->obd_name,
3957 obd->u.cli.cl_oscc.oscc_next_id);
3962 if (KEY_IS(KEY_INIT_RECOV)) {
3963 if (vallen != sizeof(int))
3965 cfs_spin_lock(&imp->imp_lock);
3966 imp->imp_initial_recov = *(int *)val;
3967 cfs_spin_unlock(&imp->imp_lock);
3968 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3969 exp->exp_obd->obd_name,
3970 imp->imp_initial_recov);
3974 if (KEY_IS(KEY_CHECKSUM)) {
3975 if (vallen != sizeof(int))
3977 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3981 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3982 sptlrpc_conf_client_adapt(obd);
3986 if (KEY_IS(KEY_FLUSH_CTX)) {
3987 sptlrpc_import_flush_my_ctx(imp);
3991 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3994 /* We pass all other commands directly to OST. Since nobody calls osc
3995 methods directly and everybody is supposed to go through LOV, we
3996 assume lov checked invalid values for us.
3997 The only recognised values so far are evict_by_nid and mds_conn.
3998 Even if something bad goes through, we'd get a -EINVAL from OST
4001 if (KEY_IS(KEY_GRANT_SHRINK))
4002 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
4004 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
4009 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
4010 RCL_CLIENT, keylen);
4011 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
4012 RCL_CLIENT, vallen);
4013 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
4015 ptlrpc_request_free(req);
4019 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
4020 memcpy(tmp, key, keylen);
4021 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
4022 memcpy(tmp, val, vallen);
4024 if (KEY_IS(KEY_MDS_CONN)) {
4025 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4027 oscc->oscc_oa.o_gr = (*(__u32 *)val);
4028 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
4029 LASSERT_MDS_GROUP(oscc->oscc_oa.o_gr);
4030 req->rq_no_delay = req->rq_no_resend = 1;
4031 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
4032 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
4033 struct osc_grant_args *aa;
4036 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
4037 aa = ptlrpc_req_async_args(req);
4040 ptlrpc_req_finished(req);
4043 *oa = ((struct ost_body *)val)->oa;
4045 req->rq_interpret_reply = osc_shrink_grant_interpret;
4048 ptlrpc_request_set_replen(req);
4049 if (!KEY_IS(KEY_GRANT_SHRINK)) {
4050 LASSERT(set != NULL);
4051 ptlrpc_set_add_req(set, req);
4052 ptlrpc_check_set(NULL, set);
4054 ptlrpcd_add_req(req, PSCOPE_OTHER);
4060 static struct llog_operations osc_size_repl_logops = {
4061 lop_cancel: llog_obd_repl_cancel
4064 static struct llog_operations osc_mds_ost_orig_logops;
4066 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4067 struct obd_device *tgt, struct llog_catid *catid)
4072 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4073 &catid->lci_logid, &osc_mds_ost_orig_logops);
4075 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4079 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4080 NULL, &osc_size_repl_logops);
4082 struct llog_ctxt *ctxt =
4083 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4086 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4091 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4092 obd->obd_name, tgt->obd_name, catid, rc);
4093 CERROR("logid "LPX64":0x%x\n",
4094 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4099 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4100 struct obd_device *disk_obd, int *index)
4102 struct llog_catid catid;
4103 static char name[32] = CATLIST;
4107 LASSERT(olg == &obd->obd_olg);
4109 cfs_mutex_down(&olg->olg_cat_processing);
4110 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4112 CERROR("rc: %d\n", rc);
4116 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4117 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4118 catid.lci_logid.lgl_ogr, catid.lci_logid.lgl_ogen);
4120 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4122 CERROR("rc: %d\n", rc);
4126 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4128 CERROR("rc: %d\n", rc);
4133 cfs_mutex_up(&olg->olg_cat_processing);
4138 static int osc_llog_finish(struct obd_device *obd, int count)
4140 struct llog_ctxt *ctxt;
4141 int rc = 0, rc2 = 0;
4144 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4146 rc = llog_cleanup(ctxt);
4148 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4150 rc2 = llog_cleanup(ctxt);
4157 static int osc_reconnect(const struct lu_env *env,
4158 struct obd_export *exp, struct obd_device *obd,
4159 struct obd_uuid *cluuid,
4160 struct obd_connect_data *data,
4163 struct client_obd *cli = &obd->u.cli;
4165 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4168 client_obd_list_lock(&cli->cl_loi_list_lock);
4169 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
4170 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4171 lost_grant = cli->cl_lost_grant;
4172 cli->cl_lost_grant = 0;
4173 client_obd_list_unlock(&cli->cl_loi_list_lock);
4175 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4176 "cl_dirty: %ld cl_lost_grant: %ld\n", data->ocd_grant,
4177 cli->cl_avail_grant, cli->cl_dirty, lost_grant);
4178 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4179 " ocd_grant: %d\n", data->ocd_connect_flags,
4180 data->ocd_version, data->ocd_grant);
4186 static int osc_disconnect(struct obd_export *exp)
4188 struct obd_device *obd = class_exp2obd(exp);
4189 struct llog_ctxt *ctxt;
4192 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4194 if (obd->u.cli.cl_conn_count == 1) {
4195 /* Flush any remaining cancel messages out to the
4197 llog_sync(ctxt, exp);
4199 llog_ctxt_put(ctxt);
4201 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4205 rc = client_disconnect_export(exp);
4207 * Initially we put del_shrink_grant before disconnect_export, but it
4208 * causes the following problem if setup (connect) and cleanup
4209 * (disconnect) are tangled together.
4210 * connect p1 disconnect p2
4211 * ptlrpc_connect_import
4212 * ............... class_manual_cleanup
4215 * ptlrpc_connect_interrupt
4217 * add this client to shrink list
4219 * Bang! pinger trigger the shrink.
4220 * So the osc should be disconnected from the shrink list, after we
4221 * are sure the import has been destroyed. BUG18662
4223 if (obd->u.cli.cl_import == NULL)
4224 osc_del_shrink_grant(&obd->u.cli);
4228 static int osc_import_event(struct obd_device *obd,
4229 struct obd_import *imp,
4230 enum obd_import_event event)
4232 struct client_obd *cli;
4236 LASSERT(imp->imp_obd == obd);
4239 case IMP_EVENT_DISCON: {
4240 /* Only do this on the MDS OSC's */
4241 if (imp->imp_server_timeout) {
4242 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4244 cfs_spin_lock(&oscc->oscc_lock);
4245 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4246 cfs_spin_unlock(&oscc->oscc_lock);
4249 client_obd_list_lock(&cli->cl_loi_list_lock);
4250 cli->cl_avail_grant = 0;
4251 cli->cl_lost_grant = 0;
4252 client_obd_list_unlock(&cli->cl_loi_list_lock);
4255 case IMP_EVENT_INACTIVE: {
4256 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4259 case IMP_EVENT_INVALIDATE: {
4260 struct ldlm_namespace *ns = obd->obd_namespace;
4264 env = cl_env_get(&refcheck);
4268 client_obd_list_lock(&cli->cl_loi_list_lock);
4269 /* all pages go to failing rpcs due to the invalid
4271 osc_check_rpcs(env, cli);
4272 client_obd_list_unlock(&cli->cl_loi_list_lock);
4274 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4275 cl_env_put(env, &refcheck);
4280 case IMP_EVENT_ACTIVE: {
4281 /* Only do this on the MDS OSC's */
4282 if (imp->imp_server_timeout) {
4283 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4285 cfs_spin_lock(&oscc->oscc_lock);
4286 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
4287 cfs_spin_unlock(&oscc->oscc_lock);
4289 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4292 case IMP_EVENT_OCD: {
4293 struct obd_connect_data *ocd = &imp->imp_connect_data;
4295 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4296 osc_init_grant(&obd->u.cli, ocd);
4299 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4300 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4302 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4306 CERROR("Unknown import event %d\n", event);
4312 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4318 rc = ptlrpcd_addref();
4322 rc = client_obd_setup(obd, lcfg);
4326 struct lprocfs_static_vars lvars = { 0 };
4327 struct client_obd *cli = &obd->u.cli;
4329 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4330 lprocfs_osc_init_vars(&lvars);
4331 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4332 lproc_osc_attach_seqstat(obd);
4333 sptlrpc_lprocfs_cliobd_attach(obd);
4334 ptlrpc_lprocfs_register_obd(obd);
4338 /* We need to allocate a few requests more, because
4339 brw_interpret tries to create new requests before freeing
4340 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4341 reserved, but I afraid that might be too much wasted RAM
4342 in fact, so 2 is just my guess and still should work. */
4343 cli->cl_import->imp_rq_pool =
4344 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4346 ptlrpc_add_rqs_to_pool);
4348 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4349 cfs_sema_init(&cli->cl_grant_sem, 1);
4355 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4361 case OBD_CLEANUP_EARLY: {
4362 struct obd_import *imp;
4363 imp = obd->u.cli.cl_import;
4364 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4365 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4366 ptlrpc_deactivate_import(imp);
4367 cfs_spin_lock(&imp->imp_lock);
4368 imp->imp_pingable = 0;
4369 cfs_spin_unlock(&imp->imp_lock);
4372 case OBD_CLEANUP_EXPORTS: {
4373 /* If we set up but never connected, the
4374 client import will not have been cleaned. */
4375 if (obd->u.cli.cl_import) {
4376 struct obd_import *imp;
4377 cfs_down_write(&obd->u.cli.cl_sem);
4378 imp = obd->u.cli.cl_import;
4379 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4381 ptlrpc_invalidate_import(imp);
4382 if (imp->imp_rq_pool) {
4383 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4384 imp->imp_rq_pool = NULL;
4386 class_destroy_import(imp);
4387 cfs_up_write(&obd->u.cli.cl_sem);
4388 obd->u.cli.cl_import = NULL;
4390 rc = obd_llog_finish(obd, 0);
4392 CERROR("failed to cleanup llogging subsystems\n");
4399 int osc_cleanup(struct obd_device *obd)
4404 ptlrpc_lprocfs_unregister_obd(obd);
4405 lprocfs_obd_cleanup(obd);
4407 /* free memory of osc quota cache */
4408 lquota_cleanup(quota_interface, obd);
4410 rc = client_obd_cleanup(obd);
4416 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4418 struct lprocfs_static_vars lvars = { 0 };
4421 lprocfs_osc_init_vars(&lvars);
4423 switch (lcfg->lcfg_command) {
4425 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4435 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4437 return osc_process_config_base(obd, buf);
4440 struct obd_ops osc_obd_ops = {
4441 .o_owner = THIS_MODULE,
4442 .o_setup = osc_setup,
4443 .o_precleanup = osc_precleanup,
4444 .o_cleanup = osc_cleanup,
4445 .o_add_conn = client_import_add_conn,
4446 .o_del_conn = client_import_del_conn,
4447 .o_connect = client_connect_import,
4448 .o_reconnect = osc_reconnect,
4449 .o_disconnect = osc_disconnect,
4450 .o_statfs = osc_statfs,
4451 .o_statfs_async = osc_statfs_async,
4452 .o_packmd = osc_packmd,
4453 .o_unpackmd = osc_unpackmd,
4454 .o_precreate = osc_precreate,
4455 .o_create = osc_create,
4456 .o_create_async = osc_create_async,
4457 .o_destroy = osc_destroy,
4458 .o_getattr = osc_getattr,
4459 .o_getattr_async = osc_getattr_async,
4460 .o_setattr = osc_setattr,
4461 .o_setattr_async = osc_setattr_async,
4463 .o_punch = osc_punch,
4465 .o_enqueue = osc_enqueue,
4466 .o_change_cbdata = osc_change_cbdata,
4467 .o_cancel = osc_cancel,
4468 .o_cancel_unused = osc_cancel_unused,
4469 .o_iocontrol = osc_iocontrol,
4470 .o_get_info = osc_get_info,
4471 .o_set_info_async = osc_set_info_async,
4472 .o_import_event = osc_import_event,
4473 .o_llog_init = osc_llog_init,
4474 .o_llog_finish = osc_llog_finish,
4475 .o_process_config = osc_process_config,
4478 extern struct lu_kmem_descr osc_caches[];
4479 extern cfs_spinlock_t osc_ast_guard;
4480 extern cfs_lock_class_key_t osc_ast_guard_class;
4482 int __init osc_init(void)
4484 struct lprocfs_static_vars lvars = { 0 };
4488 /* print an address of _any_ initialized kernel symbol from this
4489 * module, to allow debugging with gdb that doesn't support data
4490 * symbols from modules.*/
4491 CDEBUG(D_CONSOLE, "Lustre OSC module (%p).\n", &osc_caches);
4493 rc = lu_kmem_init(osc_caches);
4495 lprocfs_osc_init_vars(&lvars);
4497 cfs_request_module("lquota");
4498 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4499 lquota_init(quota_interface);
4500 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4502 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4503 LUSTRE_OSC_NAME, &osc_device_type);
4505 if (quota_interface)
4506 PORTAL_SYMBOL_PUT(osc_quota_interface);
4507 lu_kmem_fini(osc_caches);
4511 cfs_spin_lock_init(&osc_ast_guard);
4512 cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4514 osc_mds_ost_orig_logops = llog_lvfs_ops;
4515 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4516 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4517 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4518 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4524 static void /*__exit*/ osc_exit(void)
4526 lu_device_type_fini(&osc_device_type);
4528 lquota_exit(quota_interface);
4529 if (quota_interface)
4530 PORTAL_SYMBOL_PUT(osc_quota_interface);
4532 class_unregister_type(LUSTRE_OSC_NAME);
4533 lu_kmem_fini(osc_caches);
4536 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4537 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4538 MODULE_LICENSE("GPL");
4540 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob