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 /* It is safe to block as a cache waiter as long as there is grant
2822 * space available or the hope of additional grant being returned
2823 * when an in flight write completes. Using the write back cache
2824 * if possible is preferable to sending the data synchronously
2825 * because write pages can then be merged in to large requests.
2826 * The addition of this cache waiter will causing pending write
2827 * pages to be sent immediately. */
2828 if (cli->cl_w_in_flight || cli->cl_avail_grant >= CFS_PAGE_SIZE) {
2829 cfs_list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2830 cfs_waitq_init(&ocw.ocw_waitq);
2834 loi_list_maint(cli, loi);
2835 osc_check_rpcs(env, cli);
2836 client_obd_list_unlock(&cli->cl_loi_list_lock);
2838 CDEBUG(D_CACHE, "sleeping for cache space\n");
2839 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2841 client_obd_list_lock(&cli->cl_loi_list_lock);
2842 if (!cfs_list_empty(&ocw.ocw_entry)) {
2843 cfs_list_del(&ocw.ocw_entry);
2853 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2854 struct lov_oinfo *loi, cfs_page_t *page,
2855 obd_off offset, const struct obd_async_page_ops *ops,
2856 void *data, void **res, int nocache,
2857 struct lustre_handle *lockh)
2859 struct osc_async_page *oap;
2864 return cfs_size_round(sizeof(*oap));
2867 oap->oap_magic = OAP_MAGIC;
2868 oap->oap_cli = &exp->exp_obd->u.cli;
2871 oap->oap_caller_ops = ops;
2872 oap->oap_caller_data = data;
2874 oap->oap_page = page;
2875 oap->oap_obj_off = offset;
2876 if (!client_is_remote(exp) &&
2877 cfs_capable(CFS_CAP_SYS_RESOURCE))
2878 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2880 LASSERT(!(offset & ~CFS_PAGE_MASK));
2882 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2883 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2884 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2885 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2887 cfs_spin_lock_init(&oap->oap_lock);
2888 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2892 struct osc_async_page *oap_from_cookie(void *cookie)
2894 struct osc_async_page *oap = cookie;
2895 if (oap->oap_magic != OAP_MAGIC)
2896 return ERR_PTR(-EINVAL);
2900 int osc_queue_async_io(const struct lu_env *env,
2901 struct obd_export *exp, struct lov_stripe_md *lsm,
2902 struct lov_oinfo *loi, void *cookie,
2903 int cmd, obd_off off, int count,
2904 obd_flag brw_flags, enum async_flags async_flags)
2906 struct client_obd *cli = &exp->exp_obd->u.cli;
2907 struct osc_async_page *oap;
2911 oap = oap_from_cookie(cookie);
2913 RETURN(PTR_ERR(oap));
2915 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2918 if (!cfs_list_empty(&oap->oap_pending_item) ||
2919 !cfs_list_empty(&oap->oap_urgent_item) ||
2920 !cfs_list_empty(&oap->oap_rpc_item))
2923 /* check if the file's owner/group is over quota */
2924 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
2925 struct cl_object *obj;
2926 struct cl_attr attr; /* XXX put attr into thread info */
2927 unsigned int qid[MAXQUOTAS];
2929 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
2931 cl_object_attr_lock(obj);
2932 rc = cl_object_attr_get(env, obj, &attr);
2933 cl_object_attr_unlock(obj);
2935 qid[USRQUOTA] = attr.cat_uid;
2936 qid[GRPQUOTA] = attr.cat_gid;
2938 lquota_chkdq(quota_interface, cli, qid) == NO_QUOTA)
2945 loi = lsm->lsm_oinfo[0];
2947 client_obd_list_lock(&cli->cl_loi_list_lock);
2949 LASSERT(off + count <= CFS_PAGE_SIZE);
2951 oap->oap_page_off = off;
2952 oap->oap_count = count;
2953 oap->oap_brw_flags = brw_flags;
2954 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
2955 if (libcfs_memory_pressure_get())
2956 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2957 cfs_spin_lock(&oap->oap_lock);
2958 oap->oap_async_flags = async_flags;
2959 cfs_spin_unlock(&oap->oap_lock);
2961 if (cmd & OBD_BRW_WRITE) {
2962 rc = osc_enter_cache(env, cli, loi, oap);
2964 client_obd_list_unlock(&cli->cl_loi_list_lock);
2969 osc_oap_to_pending(oap);
2970 loi_list_maint(cli, loi);
2972 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2975 osc_check_rpcs(env, cli);
2976 client_obd_list_unlock(&cli->cl_loi_list_lock);
2981 /* aka (~was & now & flag), but this is more clear :) */
2982 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2984 int osc_set_async_flags_base(struct client_obd *cli,
2985 struct lov_oinfo *loi, struct osc_async_page *oap,
2986 obd_flag async_flags)
2988 struct loi_oap_pages *lop;
2992 LASSERT(!cfs_list_empty(&oap->oap_pending_item));
2994 if (oap->oap_cmd & OBD_BRW_WRITE) {
2995 lop = &loi->loi_write_lop;
2997 lop = &loi->loi_read_lop;
3000 if ((oap->oap_async_flags & async_flags) == async_flags)
3003 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
3004 flags |= ASYNC_READY;
3006 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
3007 cfs_list_empty(&oap->oap_rpc_item)) {
3008 if (oap->oap_async_flags & ASYNC_HP)
3009 cfs_list_add(&oap->oap_urgent_item, &lop->lop_urgent);
3011 cfs_list_add_tail(&oap->oap_urgent_item,
3013 flags |= ASYNC_URGENT;
3014 loi_list_maint(cli, loi);
3016 cfs_spin_lock(&oap->oap_lock);
3017 oap->oap_async_flags |= flags;
3018 cfs_spin_unlock(&oap->oap_lock);
3020 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
3021 oap->oap_async_flags);
3025 int osc_teardown_async_page(struct obd_export *exp,
3026 struct lov_stripe_md *lsm,
3027 struct lov_oinfo *loi, void *cookie)
3029 struct client_obd *cli = &exp->exp_obd->u.cli;
3030 struct loi_oap_pages *lop;
3031 struct osc_async_page *oap;
3035 oap = oap_from_cookie(cookie);
3037 RETURN(PTR_ERR(oap));
3040 loi = lsm->lsm_oinfo[0];
3042 if (oap->oap_cmd & OBD_BRW_WRITE) {
3043 lop = &loi->loi_write_lop;
3045 lop = &loi->loi_read_lop;
3048 client_obd_list_lock(&cli->cl_loi_list_lock);
3050 if (!cfs_list_empty(&oap->oap_rpc_item))
3051 GOTO(out, rc = -EBUSY);
3053 osc_exit_cache(cli, oap, 0);
3054 osc_wake_cache_waiters(cli);
3056 if (!cfs_list_empty(&oap->oap_urgent_item)) {
3057 cfs_list_del_init(&oap->oap_urgent_item);
3058 cfs_spin_lock(&oap->oap_lock);
3059 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3060 cfs_spin_unlock(&oap->oap_lock);
3062 if (!cfs_list_empty(&oap->oap_pending_item)) {
3063 cfs_list_del_init(&oap->oap_pending_item);
3064 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3066 loi_list_maint(cli, loi);
3067 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3069 client_obd_list_unlock(&cli->cl_loi_list_lock);
3073 static void osc_set_lock_data_with_check(struct ldlm_lock *lock,
3074 struct ldlm_enqueue_info *einfo,
3077 void *data = einfo->ei_cbdata;
3079 LASSERT(lock != NULL);
3080 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3081 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3082 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3083 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3085 lock_res_and_lock(lock);
3086 cfs_spin_lock(&osc_ast_guard);
3087 LASSERT(lock->l_ast_data == NULL || lock->l_ast_data == data);
3088 lock->l_ast_data = data;
3089 cfs_spin_unlock(&osc_ast_guard);
3090 unlock_res_and_lock(lock);
3093 static void osc_set_data_with_check(struct lustre_handle *lockh,
3094 struct ldlm_enqueue_info *einfo,
3097 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3100 osc_set_lock_data_with_check(lock, einfo, flags);
3101 LDLM_LOCK_PUT(lock);
3103 CERROR("lockh %p, data %p - client evicted?\n",
3104 lockh, einfo->ei_cbdata);
3107 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3108 ldlm_iterator_t replace, void *data)
3110 struct ldlm_res_id res_id;
3111 struct obd_device *obd = class_exp2obd(exp);
3113 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_gr, &res_id);
3114 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3118 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3119 obd_enqueue_update_f upcall, void *cookie,
3122 int intent = *flags & LDLM_FL_HAS_INTENT;
3126 /* The request was created before ldlm_cli_enqueue call. */
3127 if (rc == ELDLM_LOCK_ABORTED) {
3128 struct ldlm_reply *rep;
3129 rep = req_capsule_server_get(&req->rq_pill,
3132 LASSERT(rep != NULL);
3133 if (rep->lock_policy_res1)
3134 rc = rep->lock_policy_res1;
3138 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3139 *flags |= LDLM_FL_LVB_READY;
3140 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3141 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3144 /* Call the update callback. */
3145 rc = (*upcall)(cookie, rc);
3149 static int osc_enqueue_interpret(const struct lu_env *env,
3150 struct ptlrpc_request *req,
3151 struct osc_enqueue_args *aa, int rc)
3153 struct ldlm_lock *lock;
3154 struct lustre_handle handle;
3157 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3158 * might be freed anytime after lock upcall has been called. */
3159 lustre_handle_copy(&handle, aa->oa_lockh);
3160 mode = aa->oa_ei->ei_mode;
3162 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3164 lock = ldlm_handle2lock(&handle);
3166 /* Take an additional reference so that a blocking AST that
3167 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3168 * to arrive after an upcall has been executed by
3169 * osc_enqueue_fini(). */
3170 ldlm_lock_addref(&handle, mode);
3172 /* Complete obtaining the lock procedure. */
3173 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3174 mode, aa->oa_flags, aa->oa_lvb,
3175 sizeof(*aa->oa_lvb), &handle, rc);
3176 /* Complete osc stuff. */
3177 rc = osc_enqueue_fini(req, aa->oa_lvb,
3178 aa->oa_upcall, aa->oa_cookie, aa->oa_flags, rc);
3180 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3182 /* Release the lock for async request. */
3183 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3185 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3186 * not already released by
3187 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3189 ldlm_lock_decref(&handle, mode);
3191 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3192 aa->oa_lockh, req, aa);
3193 ldlm_lock_decref(&handle, mode);
3194 LDLM_LOCK_PUT(lock);
3198 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3199 struct lov_oinfo *loi, int flags,
3200 struct ost_lvb *lvb, __u32 mode, int rc)
3202 if (rc == ELDLM_OK) {
3203 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3206 LASSERT(lock != NULL);
3207 loi->loi_lvb = *lvb;
3208 tmp = loi->loi_lvb.lvb_size;
3209 /* Extend KMS up to the end of this lock and no further
3210 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3211 if (tmp > lock->l_policy_data.l_extent.end)
3212 tmp = lock->l_policy_data.l_extent.end + 1;
3213 if (tmp >= loi->loi_kms) {
3214 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3215 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3216 loi_kms_set(loi, tmp);
3218 LDLM_DEBUG(lock, "lock acquired, setting rss="
3219 LPU64"; leaving kms="LPU64", end="LPU64,
3220 loi->loi_lvb.lvb_size, loi->loi_kms,
3221 lock->l_policy_data.l_extent.end);
3223 ldlm_lock_allow_match(lock);
3224 LDLM_LOCK_PUT(lock);
3225 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3226 loi->loi_lvb = *lvb;
3227 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3228 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3232 EXPORT_SYMBOL(osc_update_enqueue);
3234 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3236 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3237 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3238 * other synchronous requests, however keeping some locks and trying to obtain
3239 * others may take a considerable amount of time in a case of ost failure; and
3240 * when other sync requests do not get released lock from a client, the client
3241 * is excluded from the cluster -- such scenarious make the life difficult, so
3242 * release locks just after they are obtained. */
3243 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3244 int *flags, ldlm_policy_data_t *policy,
3245 struct ost_lvb *lvb, int kms_valid,
3246 obd_enqueue_update_f upcall, void *cookie,
3247 struct ldlm_enqueue_info *einfo,
3248 struct lustre_handle *lockh,
3249 struct ptlrpc_request_set *rqset, int async)
3251 struct obd_device *obd = exp->exp_obd;
3252 struct ptlrpc_request *req = NULL;
3253 int intent = *flags & LDLM_FL_HAS_INTENT;
3258 /* Filesystem lock extents are extended to page boundaries so that
3259 * dealing with the page cache is a little smoother. */
3260 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3261 policy->l_extent.end |= ~CFS_PAGE_MASK;
3264 * kms is not valid when either object is completely fresh (so that no
3265 * locks are cached), or object was evicted. In the latter case cached
3266 * lock cannot be used, because it would prime inode state with
3267 * potentially stale LVB.
3272 /* Next, search for already existing extent locks that will cover us */
3273 /* If we're trying to read, we also search for an existing PW lock. The
3274 * VFS and page cache already protect us locally, so lots of readers/
3275 * writers can share a single PW lock.
3277 * There are problems with conversion deadlocks, so instead of
3278 * converting a read lock to a write lock, we'll just enqueue a new
3281 * At some point we should cancel the read lock instead of making them
3282 * send us a blocking callback, but there are problems with canceling
3283 * locks out from other users right now, too. */
3284 mode = einfo->ei_mode;
3285 if (einfo->ei_mode == LCK_PR)
3287 mode = ldlm_lock_match(obd->obd_namespace,
3288 *flags | LDLM_FL_LVB_READY, res_id,
3289 einfo->ei_type, policy, mode, lockh, 0);
3291 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3293 if (matched->l_ast_data == NULL ||
3294 matched->l_ast_data == einfo->ei_cbdata) {
3295 /* addref the lock only if not async requests and PW
3296 * lock is matched whereas we asked for PR. */
3297 if (!rqset && einfo->ei_mode != mode)
3298 ldlm_lock_addref(lockh, LCK_PR);
3299 osc_set_lock_data_with_check(matched, einfo, *flags);
3301 /* I would like to be able to ASSERT here that
3302 * rss <= kms, but I can't, for reasons which
3303 * are explained in lov_enqueue() */
3306 /* We already have a lock, and it's referenced */
3307 (*upcall)(cookie, ELDLM_OK);
3309 /* For async requests, decref the lock. */
3310 if (einfo->ei_mode != mode)
3311 ldlm_lock_decref(lockh, LCK_PW);
3313 ldlm_lock_decref(lockh, einfo->ei_mode);
3314 LDLM_LOCK_PUT(matched);
3317 ldlm_lock_decref(lockh, mode);
3318 LDLM_LOCK_PUT(matched);
3323 CFS_LIST_HEAD(cancels);
3324 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3325 &RQF_LDLM_ENQUEUE_LVB);
3329 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3333 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3335 ptlrpc_request_set_replen(req);
3338 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3339 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3341 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3342 sizeof(*lvb), lockh, async);
3345 struct osc_enqueue_args *aa;
3346 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3347 aa = ptlrpc_req_async_args(req);
3350 aa->oa_flags = flags;
3351 aa->oa_upcall = upcall;
3352 aa->oa_cookie = cookie;
3354 aa->oa_lockh = lockh;
3356 req->rq_interpret_reply =
3357 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3358 if (rqset == PTLRPCD_SET)
3359 ptlrpcd_add_req(req, PSCOPE_OTHER);
3361 ptlrpc_set_add_req(rqset, req);
3362 } else if (intent) {
3363 ptlrpc_req_finished(req);
3368 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, rc);
3370 ptlrpc_req_finished(req);
3375 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3376 struct ldlm_enqueue_info *einfo,
3377 struct ptlrpc_request_set *rqset)
3379 struct ldlm_res_id res_id;
3383 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3384 oinfo->oi_md->lsm_object_gr, &res_id);
3386 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3387 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3388 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3389 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3390 rqset, rqset != NULL);
3394 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3395 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3396 int *flags, void *data, struct lustre_handle *lockh,
3399 struct obd_device *obd = exp->exp_obd;
3400 int lflags = *flags;
3404 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3407 /* Filesystem lock extents are extended to page boundaries so that
3408 * dealing with the page cache is a little smoother */
3409 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3410 policy->l_extent.end |= ~CFS_PAGE_MASK;
3412 /* Next, search for already existing extent locks that will cover us */
3413 /* If we're trying to read, we also search for an existing PW lock. The
3414 * VFS and page cache already protect us locally, so lots of readers/
3415 * writers can share a single PW lock. */
3419 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3420 res_id, type, policy, rc, lockh, unref);
3423 osc_set_data_with_check(lockh, data, lflags);
3424 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3425 ldlm_lock_addref(lockh, LCK_PR);
3426 ldlm_lock_decref(lockh, LCK_PW);
3433 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3437 if (unlikely(mode == LCK_GROUP))
3438 ldlm_lock_decref_and_cancel(lockh, mode);
3440 ldlm_lock_decref(lockh, mode);
3445 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3446 __u32 mode, struct lustre_handle *lockh)
3449 RETURN(osc_cancel_base(lockh, mode));
3452 static int osc_cancel_unused(struct obd_export *exp,
3453 struct lov_stripe_md *lsm, int flags,
3456 struct obd_device *obd = class_exp2obd(exp);
3457 struct ldlm_res_id res_id, *resp = NULL;
3460 resp = osc_build_res_name(lsm->lsm_object_id,
3461 lsm->lsm_object_gr, &res_id);
3464 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3467 static int osc_statfs_interpret(const struct lu_env *env,
3468 struct ptlrpc_request *req,
3469 struct osc_async_args *aa, int rc)
3471 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3472 struct obd_statfs *msfs;
3477 /* The request has in fact never been sent
3478 * due to issues at a higher level (LOV).
3479 * Exit immediately since the caller is
3480 * aware of the problem and takes care
3481 * of the clean up */
3484 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3485 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3491 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3493 GOTO(out, rc = -EPROTO);
3496 /* Reinitialize the RDONLY and DEGRADED flags at the client
3497 * on each statfs, so they don't stay set permanently. */
3498 cfs_spin_lock(&cli->cl_oscc.oscc_lock);
3500 if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
3501 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3502 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
3503 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
3505 if (unlikely(msfs->os_state & OS_STATE_READONLY))
3506 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3507 else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
3508 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
3510 /* Add a bit of hysteresis so this flag isn't continually flapping,
3511 * and ensure that new files don't get extremely fragmented due to
3512 * only a small amount of available space in the filesystem.
3513 * We want to set the NOSPC flag when there is less than ~0.1% free
3514 * and clear it when there is at least ~0.2% free space, so:
3515 * avail < ~0.1% max max = avail + used
3516 * 1025 * avail < avail + used used = blocks - free
3517 * 1024 * avail < used
3518 * 1024 * avail < blocks - free
3519 * avail < ((blocks - free) >> 10)
3521 * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
3522 * lose that amount of space so in those cases we report no space left
3523 * if their is less than 1 GB left. */
3524 used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
3525 if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
3526 ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
3527 cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
3528 else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
3529 (msfs->os_ffree > 64) && (msfs->os_bavail > (used << 1))))
3530 cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_NOSPC;
3532 cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
3534 *aa->aa_oi->oi_osfs = *msfs;
3536 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3540 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3541 __u64 max_age, struct ptlrpc_request_set *rqset)
3543 struct ptlrpc_request *req;
3544 struct osc_async_args *aa;
3548 /* We could possibly pass max_age in the request (as an absolute
3549 * timestamp or a "seconds.usec ago") so the target can avoid doing
3550 * extra calls into the filesystem if that isn't necessary (e.g.
3551 * during mount that would help a bit). Having relative timestamps
3552 * is not so great if request processing is slow, while absolute
3553 * timestamps are not ideal because they need time synchronization. */
3554 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3558 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3560 ptlrpc_request_free(req);
3563 ptlrpc_request_set_replen(req);
3564 req->rq_request_portal = OST_CREATE_PORTAL;
3565 ptlrpc_at_set_req_timeout(req);
3567 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3568 /* procfs requests not want stat in wait for avoid deadlock */
3569 req->rq_no_resend = 1;
3570 req->rq_no_delay = 1;
3573 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3574 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3575 aa = ptlrpc_req_async_args(req);
3578 ptlrpc_set_add_req(rqset, req);
3582 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3583 __u64 max_age, __u32 flags)
3585 struct obd_statfs *msfs;
3586 struct ptlrpc_request *req;
3587 struct obd_import *imp = NULL;
3591 /*Since the request might also come from lprocfs, so we need
3592 *sync this with client_disconnect_export Bug15684*/
3593 cfs_down_read(&obd->u.cli.cl_sem);
3594 if (obd->u.cli.cl_import)
3595 imp = class_import_get(obd->u.cli.cl_import);
3596 cfs_up_read(&obd->u.cli.cl_sem);
3600 /* We could possibly pass max_age in the request (as an absolute
3601 * timestamp or a "seconds.usec ago") so the target can avoid doing
3602 * extra calls into the filesystem if that isn't necessary (e.g.
3603 * during mount that would help a bit). Having relative timestamps
3604 * is not so great if request processing is slow, while absolute
3605 * timestamps are not ideal because they need time synchronization. */
3606 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3608 class_import_put(imp);
3613 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3615 ptlrpc_request_free(req);
3618 ptlrpc_request_set_replen(req);
3619 req->rq_request_portal = OST_CREATE_PORTAL;
3620 ptlrpc_at_set_req_timeout(req);
3622 if (flags & OBD_STATFS_NODELAY) {
3623 /* procfs requests not want stat in wait for avoid deadlock */
3624 req->rq_no_resend = 1;
3625 req->rq_no_delay = 1;
3628 rc = ptlrpc_queue_wait(req);
3632 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3634 GOTO(out, rc = -EPROTO);
3641 ptlrpc_req_finished(req);
3645 /* Retrieve object striping information.
3647 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3648 * the maximum number of OST indices which will fit in the user buffer.
3649 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3651 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3653 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3654 struct lov_user_md_v3 lum, *lumk;
3655 struct lov_user_ost_data_v1 *lmm_objects;
3656 int rc = 0, lum_size;
3662 /* we only need the header part from user space to get lmm_magic and
3663 * lmm_stripe_count, (the header part is common to v1 and v3) */
3664 lum_size = sizeof(struct lov_user_md_v1);
3665 if (cfs_copy_from_user(&lum, lump, lum_size))
3668 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3669 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3672 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3673 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3674 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3675 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3677 /* we can use lov_mds_md_size() to compute lum_size
3678 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3679 if (lum.lmm_stripe_count > 0) {
3680 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3681 OBD_ALLOC(lumk, lum_size);
3685 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3686 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3688 lmm_objects = &(lumk->lmm_objects[0]);
3689 lmm_objects->l_object_id = lsm->lsm_object_id;
3691 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3695 lumk->lmm_object_id = lsm->lsm_object_id;
3696 lumk->lmm_object_gr = lsm->lsm_object_gr;
3697 lumk->lmm_stripe_count = 1;
3699 if (cfs_copy_to_user(lump, lumk, lum_size))
3703 OBD_FREE(lumk, lum_size);
3709 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3710 void *karg, void *uarg)
3712 struct obd_device *obd = exp->exp_obd;
3713 struct obd_ioctl_data *data = karg;
3717 if (!cfs_try_module_get(THIS_MODULE)) {
3718 CERROR("Can't get module. Is it alive?");
3722 case OBD_IOC_LOV_GET_CONFIG: {
3724 struct lov_desc *desc;
3725 struct obd_uuid uuid;
3729 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3730 GOTO(out, err = -EINVAL);
3732 data = (struct obd_ioctl_data *)buf;
3734 if (sizeof(*desc) > data->ioc_inllen1) {
3735 obd_ioctl_freedata(buf, len);
3736 GOTO(out, err = -EINVAL);
3739 if (data->ioc_inllen2 < sizeof(uuid)) {
3740 obd_ioctl_freedata(buf, len);
3741 GOTO(out, err = -EINVAL);
3744 desc = (struct lov_desc *)data->ioc_inlbuf1;
3745 desc->ld_tgt_count = 1;
3746 desc->ld_active_tgt_count = 1;
3747 desc->ld_default_stripe_count = 1;
3748 desc->ld_default_stripe_size = 0;
3749 desc->ld_default_stripe_offset = 0;
3750 desc->ld_pattern = 0;
3751 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3753 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3755 err = cfs_copy_to_user((void *)uarg, buf, len);
3758 obd_ioctl_freedata(buf, len);
3761 case LL_IOC_LOV_SETSTRIPE:
3762 err = obd_alloc_memmd(exp, karg);
3766 case LL_IOC_LOV_GETSTRIPE:
3767 err = osc_getstripe(karg, uarg);
3769 case OBD_IOC_CLIENT_RECOVER:
3770 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3775 case IOC_OSC_SET_ACTIVE:
3776 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3779 case OBD_IOC_POLL_QUOTACHECK:
3780 err = lquota_poll_check(quota_interface, exp,
3781 (struct if_quotacheck *)karg);
3783 case OBD_IOC_PING_TARGET:
3784 err = ptlrpc_obd_ping(obd);
3787 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3788 cmd, cfs_curproc_comm());
3789 GOTO(out, err = -ENOTTY);
3792 cfs_module_put(THIS_MODULE);
3796 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3797 void *key, __u32 *vallen, void *val,
3798 struct lov_stripe_md *lsm)
3801 if (!vallen || !val)
3804 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3805 __u32 *stripe = val;
3806 *vallen = sizeof(*stripe);
3809 } else if (KEY_IS(KEY_LAST_ID)) {
3810 struct ptlrpc_request *req;
3815 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3816 &RQF_OST_GET_INFO_LAST_ID);
3820 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3821 RCL_CLIENT, keylen);
3822 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3824 ptlrpc_request_free(req);
3828 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3829 memcpy(tmp, key, keylen);
3831 req->rq_no_delay = req->rq_no_resend = 1;
3832 ptlrpc_request_set_replen(req);
3833 rc = ptlrpc_queue_wait(req);
3837 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3839 GOTO(out, rc = -EPROTO);
3841 *((obd_id *)val) = *reply;
3843 ptlrpc_req_finished(req);
3845 } else if (KEY_IS(KEY_FIEMAP)) {
3846 struct ptlrpc_request *req;
3847 struct ll_user_fiemap *reply;
3851 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3852 &RQF_OST_GET_INFO_FIEMAP);
3856 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3857 RCL_CLIENT, keylen);
3858 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3859 RCL_CLIENT, *vallen);
3860 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3861 RCL_SERVER, *vallen);
3863 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3865 ptlrpc_request_free(req);
3869 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3870 memcpy(tmp, key, keylen);
3871 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3872 memcpy(tmp, val, *vallen);
3874 ptlrpc_request_set_replen(req);
3875 rc = ptlrpc_queue_wait(req);
3879 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3881 GOTO(out1, rc = -EPROTO);
3883 memcpy(val, reply, *vallen);
3885 ptlrpc_req_finished(req);
3893 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
3895 struct llog_ctxt *ctxt;
3899 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3901 rc = llog_initiator_connect(ctxt);
3902 llog_ctxt_put(ctxt);
3904 /* XXX return an error? skip setting below flags? */
3907 cfs_spin_lock(&imp->imp_lock);
3908 imp->imp_server_timeout = 1;
3909 imp->imp_pingable = 1;
3910 cfs_spin_unlock(&imp->imp_lock);
3911 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3916 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
3917 struct ptlrpc_request *req,
3924 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
3927 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3928 void *key, obd_count vallen, void *val,
3929 struct ptlrpc_request_set *set)
3931 struct ptlrpc_request *req;
3932 struct obd_device *obd = exp->exp_obd;
3933 struct obd_import *imp = class_exp2cliimp(exp);
3938 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3940 if (KEY_IS(KEY_NEXT_ID)) {
3942 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3944 if (vallen != sizeof(obd_id))
3949 if (vallen != sizeof(obd_id))
3952 /* avoid race between allocate new object and set next id
3953 * from ll_sync thread */
3954 cfs_spin_lock(&oscc->oscc_lock);
3955 new_val = *((obd_id*)val) + 1;
3956 if (new_val > oscc->oscc_next_id)
3957 oscc->oscc_next_id = new_val;
3958 cfs_spin_unlock(&oscc->oscc_lock);
3959 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3960 exp->exp_obd->obd_name,
3961 obd->u.cli.cl_oscc.oscc_next_id);
3966 if (KEY_IS(KEY_INIT_RECOV)) {
3967 if (vallen != sizeof(int))
3969 cfs_spin_lock(&imp->imp_lock);
3970 imp->imp_initial_recov = *(int *)val;
3971 cfs_spin_unlock(&imp->imp_lock);
3972 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3973 exp->exp_obd->obd_name,
3974 imp->imp_initial_recov);
3978 if (KEY_IS(KEY_CHECKSUM)) {
3979 if (vallen != sizeof(int))
3981 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3985 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3986 sptlrpc_conf_client_adapt(obd);
3990 if (KEY_IS(KEY_FLUSH_CTX)) {
3991 sptlrpc_import_flush_my_ctx(imp);
3995 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3998 /* We pass all other commands directly to OST. Since nobody calls osc
3999 methods directly and everybody is supposed to go through LOV, we
4000 assume lov checked invalid values for us.
4001 The only recognised values so far are evict_by_nid and mds_conn.
4002 Even if something bad goes through, we'd get a -EINVAL from OST
4005 if (KEY_IS(KEY_GRANT_SHRINK))
4006 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
4008 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
4013 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
4014 RCL_CLIENT, keylen);
4015 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
4016 RCL_CLIENT, vallen);
4017 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
4019 ptlrpc_request_free(req);
4023 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
4024 memcpy(tmp, key, keylen);
4025 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
4026 memcpy(tmp, val, vallen);
4028 if (KEY_IS(KEY_MDS_CONN)) {
4029 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4031 oscc->oscc_oa.o_gr = (*(__u32 *)val);
4032 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
4033 LASSERT_MDS_GROUP(oscc->oscc_oa.o_gr);
4034 req->rq_no_delay = req->rq_no_resend = 1;
4035 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
4036 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
4037 struct osc_grant_args *aa;
4040 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
4041 aa = ptlrpc_req_async_args(req);
4044 ptlrpc_req_finished(req);
4047 *oa = ((struct ost_body *)val)->oa;
4049 req->rq_interpret_reply = osc_shrink_grant_interpret;
4052 ptlrpc_request_set_replen(req);
4053 if (!KEY_IS(KEY_GRANT_SHRINK)) {
4054 LASSERT(set != NULL);
4055 ptlrpc_set_add_req(set, req);
4056 ptlrpc_check_set(NULL, set);
4058 ptlrpcd_add_req(req, PSCOPE_OTHER);
4064 static struct llog_operations osc_size_repl_logops = {
4065 lop_cancel: llog_obd_repl_cancel
4068 static struct llog_operations osc_mds_ost_orig_logops;
4070 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4071 struct obd_device *tgt, struct llog_catid *catid)
4076 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4077 &catid->lci_logid, &osc_mds_ost_orig_logops);
4079 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4083 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4084 NULL, &osc_size_repl_logops);
4086 struct llog_ctxt *ctxt =
4087 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4090 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4095 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4096 obd->obd_name, tgt->obd_name, catid, rc);
4097 CERROR("logid "LPX64":0x%x\n",
4098 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4103 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4104 struct obd_device *disk_obd, int *index)
4106 struct llog_catid catid;
4107 static char name[32] = CATLIST;
4111 LASSERT(olg == &obd->obd_olg);
4113 cfs_mutex_down(&olg->olg_cat_processing);
4114 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4116 CERROR("rc: %d\n", rc);
4120 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4121 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4122 catid.lci_logid.lgl_ogr, catid.lci_logid.lgl_ogen);
4124 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4126 CERROR("rc: %d\n", rc);
4130 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4132 CERROR("rc: %d\n", rc);
4137 cfs_mutex_up(&olg->olg_cat_processing);
4142 static int osc_llog_finish(struct obd_device *obd, int count)
4144 struct llog_ctxt *ctxt;
4145 int rc = 0, rc2 = 0;
4148 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4150 rc = llog_cleanup(ctxt);
4152 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4154 rc2 = llog_cleanup(ctxt);
4161 static int osc_reconnect(const struct lu_env *env,
4162 struct obd_export *exp, struct obd_device *obd,
4163 struct obd_uuid *cluuid,
4164 struct obd_connect_data *data,
4167 struct client_obd *cli = &obd->u.cli;
4169 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4172 client_obd_list_lock(&cli->cl_loi_list_lock);
4173 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
4174 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4175 lost_grant = cli->cl_lost_grant;
4176 cli->cl_lost_grant = 0;
4177 client_obd_list_unlock(&cli->cl_loi_list_lock);
4179 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4180 "cl_dirty: %ld cl_lost_grant: %ld\n", data->ocd_grant,
4181 cli->cl_avail_grant, cli->cl_dirty, lost_grant);
4182 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4183 " ocd_grant: %d\n", data->ocd_connect_flags,
4184 data->ocd_version, data->ocd_grant);
4190 static int osc_disconnect(struct obd_export *exp)
4192 struct obd_device *obd = class_exp2obd(exp);
4193 struct llog_ctxt *ctxt;
4196 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4198 if (obd->u.cli.cl_conn_count == 1) {
4199 /* Flush any remaining cancel messages out to the
4201 llog_sync(ctxt, exp);
4203 llog_ctxt_put(ctxt);
4205 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4209 rc = client_disconnect_export(exp);
4211 * Initially we put del_shrink_grant before disconnect_export, but it
4212 * causes the following problem if setup (connect) and cleanup
4213 * (disconnect) are tangled together.
4214 * connect p1 disconnect p2
4215 * ptlrpc_connect_import
4216 * ............... class_manual_cleanup
4219 * ptlrpc_connect_interrupt
4221 * add this client to shrink list
4223 * Bang! pinger trigger the shrink.
4224 * So the osc should be disconnected from the shrink list, after we
4225 * are sure the import has been destroyed. BUG18662
4227 if (obd->u.cli.cl_import == NULL)
4228 osc_del_shrink_grant(&obd->u.cli);
4232 static int osc_import_event(struct obd_device *obd,
4233 struct obd_import *imp,
4234 enum obd_import_event event)
4236 struct client_obd *cli;
4240 LASSERT(imp->imp_obd == obd);
4243 case IMP_EVENT_DISCON: {
4244 /* Only do this on the MDS OSC's */
4245 if (imp->imp_server_timeout) {
4246 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4248 cfs_spin_lock(&oscc->oscc_lock);
4249 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4250 cfs_spin_unlock(&oscc->oscc_lock);
4253 client_obd_list_lock(&cli->cl_loi_list_lock);
4254 cli->cl_avail_grant = 0;
4255 cli->cl_lost_grant = 0;
4256 client_obd_list_unlock(&cli->cl_loi_list_lock);
4259 case IMP_EVENT_INACTIVE: {
4260 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4263 case IMP_EVENT_INVALIDATE: {
4264 struct ldlm_namespace *ns = obd->obd_namespace;
4268 env = cl_env_get(&refcheck);
4272 client_obd_list_lock(&cli->cl_loi_list_lock);
4273 /* all pages go to failing rpcs due to the invalid
4275 osc_check_rpcs(env, cli);
4276 client_obd_list_unlock(&cli->cl_loi_list_lock);
4278 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4279 cl_env_put(env, &refcheck);
4284 case IMP_EVENT_ACTIVE: {
4285 /* Only do this on the MDS OSC's */
4286 if (imp->imp_server_timeout) {
4287 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4289 cfs_spin_lock(&oscc->oscc_lock);
4290 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
4291 cfs_spin_unlock(&oscc->oscc_lock);
4293 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4296 case IMP_EVENT_OCD: {
4297 struct obd_connect_data *ocd = &imp->imp_connect_data;
4299 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4300 osc_init_grant(&obd->u.cli, ocd);
4303 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4304 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4306 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4310 CERROR("Unknown import event %d\n", event);
4316 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4322 rc = ptlrpcd_addref();
4326 rc = client_obd_setup(obd, lcfg);
4330 struct lprocfs_static_vars lvars = { 0 };
4331 struct client_obd *cli = &obd->u.cli;
4333 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4334 lprocfs_osc_init_vars(&lvars);
4335 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4336 lproc_osc_attach_seqstat(obd);
4337 sptlrpc_lprocfs_cliobd_attach(obd);
4338 ptlrpc_lprocfs_register_obd(obd);
4342 /* We need to allocate a few requests more, because
4343 brw_interpret tries to create new requests before freeing
4344 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4345 reserved, but I afraid that might be too much wasted RAM
4346 in fact, so 2 is just my guess and still should work. */
4347 cli->cl_import->imp_rq_pool =
4348 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4350 ptlrpc_add_rqs_to_pool);
4352 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4353 cfs_sema_init(&cli->cl_grant_sem, 1);
4359 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4365 case OBD_CLEANUP_EARLY: {
4366 struct obd_import *imp;
4367 imp = obd->u.cli.cl_import;
4368 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4369 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4370 ptlrpc_deactivate_import(imp);
4371 cfs_spin_lock(&imp->imp_lock);
4372 imp->imp_pingable = 0;
4373 cfs_spin_unlock(&imp->imp_lock);
4376 case OBD_CLEANUP_EXPORTS: {
4377 /* If we set up but never connected, the
4378 client import will not have been cleaned. */
4379 if (obd->u.cli.cl_import) {
4380 struct obd_import *imp;
4381 cfs_down_write(&obd->u.cli.cl_sem);
4382 imp = obd->u.cli.cl_import;
4383 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4385 ptlrpc_invalidate_import(imp);
4386 if (imp->imp_rq_pool) {
4387 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4388 imp->imp_rq_pool = NULL;
4390 class_destroy_import(imp);
4391 cfs_up_write(&obd->u.cli.cl_sem);
4392 obd->u.cli.cl_import = NULL;
4394 rc = obd_llog_finish(obd, 0);
4396 CERROR("failed to cleanup llogging subsystems\n");
4403 int osc_cleanup(struct obd_device *obd)
4408 ptlrpc_lprocfs_unregister_obd(obd);
4409 lprocfs_obd_cleanup(obd);
4411 /* free memory of osc quota cache */
4412 lquota_cleanup(quota_interface, obd);
4414 rc = client_obd_cleanup(obd);
4420 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4422 struct lprocfs_static_vars lvars = { 0 };
4425 lprocfs_osc_init_vars(&lvars);
4427 switch (lcfg->lcfg_command) {
4429 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4439 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4441 return osc_process_config_base(obd, buf);
4444 struct obd_ops osc_obd_ops = {
4445 .o_owner = THIS_MODULE,
4446 .o_setup = osc_setup,
4447 .o_precleanup = osc_precleanup,
4448 .o_cleanup = osc_cleanup,
4449 .o_add_conn = client_import_add_conn,
4450 .o_del_conn = client_import_del_conn,
4451 .o_connect = client_connect_import,
4452 .o_reconnect = osc_reconnect,
4453 .o_disconnect = osc_disconnect,
4454 .o_statfs = osc_statfs,
4455 .o_statfs_async = osc_statfs_async,
4456 .o_packmd = osc_packmd,
4457 .o_unpackmd = osc_unpackmd,
4458 .o_precreate = osc_precreate,
4459 .o_create = osc_create,
4460 .o_create_async = osc_create_async,
4461 .o_destroy = osc_destroy,
4462 .o_getattr = osc_getattr,
4463 .o_getattr_async = osc_getattr_async,
4464 .o_setattr = osc_setattr,
4465 .o_setattr_async = osc_setattr_async,
4467 .o_punch = osc_punch,
4469 .o_enqueue = osc_enqueue,
4470 .o_change_cbdata = osc_change_cbdata,
4471 .o_cancel = osc_cancel,
4472 .o_cancel_unused = osc_cancel_unused,
4473 .o_iocontrol = osc_iocontrol,
4474 .o_get_info = osc_get_info,
4475 .o_set_info_async = osc_set_info_async,
4476 .o_import_event = osc_import_event,
4477 .o_llog_init = osc_llog_init,
4478 .o_llog_finish = osc_llog_finish,
4479 .o_process_config = osc_process_config,
4482 extern struct lu_kmem_descr osc_caches[];
4483 extern cfs_spinlock_t osc_ast_guard;
4484 extern cfs_lock_class_key_t osc_ast_guard_class;
4486 int __init osc_init(void)
4488 struct lprocfs_static_vars lvars = { 0 };
4492 /* print an address of _any_ initialized kernel symbol from this
4493 * module, to allow debugging with gdb that doesn't support data
4494 * symbols from modules.*/
4495 CDEBUG(D_CONSOLE, "Lustre OSC module (%p).\n", &osc_caches);
4497 rc = lu_kmem_init(osc_caches);
4499 lprocfs_osc_init_vars(&lvars);
4501 cfs_request_module("lquota");
4502 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4503 lquota_init(quota_interface);
4504 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4506 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4507 LUSTRE_OSC_NAME, &osc_device_type);
4509 if (quota_interface)
4510 PORTAL_SYMBOL_PUT(osc_quota_interface);
4511 lu_kmem_fini(osc_caches);
4515 cfs_spin_lock_init(&osc_ast_guard);
4516 cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4518 osc_mds_ost_orig_logops = llog_lvfs_ops;
4519 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4520 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4521 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4522 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4528 static void /*__exit*/ osc_exit(void)
4530 lu_device_type_fini(&osc_device_type);
4532 lquota_exit(quota_interface);
4533 if (quota_interface)
4534 PORTAL_SYMBOL_PUT(osc_quota_interface);
4536 class_unregister_type(LUSTRE_OSC_NAME);
4537 lu_kmem_fini(osc_caches);
4540 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4541 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4542 MODULE_LICENSE("GPL");
4544 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob