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 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 = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
214 lustre_swab_ost_body);
216 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
217 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
219 /* This should really be sent by the OST */
220 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
221 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
223 CDEBUG(D_INFO, "can't unpack ost_body\n");
225 aa->aa_oi->oi_oa->o_valid = 0;
228 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
232 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
233 struct ptlrpc_request_set *set)
235 struct ptlrpc_request *req;
236 struct osc_async_args *aa;
240 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
244 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
245 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
247 ptlrpc_request_free(req);
251 osc_pack_req_body(req, oinfo);
253 ptlrpc_request_set_replen(req);
254 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
256 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
257 aa = ptlrpc_req_async_args(req);
260 ptlrpc_set_add_req(set, req);
264 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
266 struct ptlrpc_request *req;
267 struct ost_body *body;
271 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
275 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
276 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
278 ptlrpc_request_free(req);
282 osc_pack_req_body(req, oinfo);
284 ptlrpc_request_set_replen(req);
286 rc = ptlrpc_queue_wait(req);
290 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
292 GOTO(out, rc = -EPROTO);
294 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
295 *oinfo->oi_oa = body->oa;
297 /* This should really be sent by the OST */
298 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
299 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
303 ptlrpc_req_finished(req);
307 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
308 struct obd_trans_info *oti)
310 struct ptlrpc_request *req;
311 struct ost_body *body;
315 LASSERTF(!(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP) ||
316 CHECK_MDS_GROUP(oinfo->oi_oa->o_gr),
317 "oinfo->oi_oa->o_valid="LPU64" oinfo->oi_oa->o_gr="LPU64"\n",
318 oinfo->oi_oa->o_valid, oinfo->oi_oa->o_gr);
320 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
324 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
325 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
327 ptlrpc_request_free(req);
331 osc_pack_req_body(req, oinfo);
333 ptlrpc_request_set_replen(req);
335 rc = ptlrpc_queue_wait(req);
339 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
341 GOTO(out, rc = -EPROTO);
343 *oinfo->oi_oa = body->oa;
347 ptlrpc_req_finished(req);
351 static int osc_setattr_interpret(const struct lu_env *env,
352 struct ptlrpc_request *req,
353 struct osc_async_args *aa, int rc)
355 struct ost_body *body;
361 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
363 GOTO(out, rc = -EPROTO);
365 *aa->aa_oi->oi_oa = body->oa;
367 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
371 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
372 struct obd_trans_info *oti,
373 struct ptlrpc_request_set *rqset)
375 struct ptlrpc_request *req;
376 struct osc_async_args *aa;
380 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
384 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
385 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
387 ptlrpc_request_free(req);
391 osc_pack_req_body(req, oinfo);
393 ptlrpc_request_set_replen(req);
395 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
397 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
400 /* do mds to ost setattr asynchronously */
402 /* Do not wait for response. */
403 ptlrpcd_add_req(req, PSCOPE_OTHER);
405 req->rq_interpret_reply =
406 (ptlrpc_interpterer_t)osc_setattr_interpret;
408 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
409 aa = ptlrpc_req_async_args(req);
412 ptlrpc_set_add_req(rqset, req);
418 int osc_real_create(struct obd_export *exp, struct obdo *oa,
419 struct lov_stripe_md **ea, struct obd_trans_info *oti)
421 struct ptlrpc_request *req;
422 struct ost_body *body;
423 struct lov_stripe_md *lsm;
432 rc = obd_alloc_memmd(exp, &lsm);
437 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
439 GOTO(out, rc = -ENOMEM);
441 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
443 ptlrpc_request_free(req);
447 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
451 ptlrpc_request_set_replen(req);
453 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
454 oa->o_flags == OBD_FL_DELORPHAN) {
456 "delorphan from OST integration");
457 /* Don't resend the delorphan req */
458 req->rq_no_resend = req->rq_no_delay = 1;
461 rc = ptlrpc_queue_wait(req);
465 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
467 GOTO(out_req, rc = -EPROTO);
471 /* This should really be sent by the OST */
472 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
473 oa->o_valid |= OBD_MD_FLBLKSZ;
475 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
476 * have valid lsm_oinfo data structs, so don't go touching that.
477 * This needs to be fixed in a big way.
479 lsm->lsm_object_id = oa->o_id;
480 lsm->lsm_object_gr = oa->o_gr;
484 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
486 if (oa->o_valid & OBD_MD_FLCOOKIE) {
487 if (!oti->oti_logcookies)
488 oti_alloc_cookies(oti, 1);
489 *oti->oti_logcookies = oa->o_lcookie;
493 CDEBUG(D_HA, "transno: "LPD64"\n",
494 lustre_msg_get_transno(req->rq_repmsg));
496 ptlrpc_req_finished(req);
499 obd_free_memmd(exp, &lsm);
503 static int osc_punch_interpret(const struct lu_env *env,
504 struct ptlrpc_request *req,
505 struct osc_punch_args *aa, int rc)
507 struct ost_body *body;
513 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
515 GOTO(out, rc = -EPROTO);
517 *aa->pa_oa = body->oa;
519 rc = aa->pa_upcall(aa->pa_cookie, rc);
523 int osc_punch_base(struct obd_export *exp, struct obdo *oa,
524 struct obd_capa *capa,
525 obd_enqueue_update_f upcall, void *cookie,
526 struct ptlrpc_request_set *rqset)
528 struct ptlrpc_request *req;
529 struct osc_punch_args *aa;
530 struct ost_body *body;
534 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
538 osc_set_capa_size(req, &RMF_CAPA1, capa);
539 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
541 ptlrpc_request_free(req);
544 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
545 ptlrpc_at_set_req_timeout(req);
547 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
550 osc_pack_capa(req, body, capa);
552 ptlrpc_request_set_replen(req);
555 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_punch_interpret;
556 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
557 aa = ptlrpc_req_async_args(req);
559 aa->pa_upcall = upcall;
560 aa->pa_cookie = cookie;
561 if (rqset == PTLRPCD_SET)
562 ptlrpcd_add_req(req, PSCOPE_OTHER);
564 ptlrpc_set_add_req(rqset, req);
569 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
570 struct obd_trans_info *oti,
571 struct ptlrpc_request_set *rqset)
573 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
574 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
575 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
576 return osc_punch_base(exp, oinfo->oi_oa, oinfo->oi_capa,
577 oinfo->oi_cb_up, oinfo, rqset);
580 static int osc_sync(struct obd_export *exp, struct obdo *oa,
581 struct lov_stripe_md *md, obd_size start, obd_size end,
584 struct ptlrpc_request *req;
585 struct ost_body *body;
590 CDEBUG(D_INFO, "oa NULL\n");
594 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
598 osc_set_capa_size(req, &RMF_CAPA1, capa);
599 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
601 ptlrpc_request_free(req);
605 /* overload the size and blocks fields in the oa with start/end */
606 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
609 body->oa.o_size = start;
610 body->oa.o_blocks = end;
611 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
612 osc_pack_capa(req, body, capa);
614 ptlrpc_request_set_replen(req);
616 rc = ptlrpc_queue_wait(req);
620 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
622 GOTO(out, rc = -EPROTO);
628 ptlrpc_req_finished(req);
632 /* Find and cancel locally locks matched by @mode in the resource found by
633 * @objid. Found locks are added into @cancel list. Returns the amount of
634 * locks added to @cancels list. */
635 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
636 struct list_head *cancels, ldlm_mode_t mode,
639 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
640 struct ldlm_res_id res_id;
641 struct ldlm_resource *res;
645 osc_build_res_name(oa->o_id, oa->o_gr, &res_id);
646 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
650 LDLM_RESOURCE_ADDREF(res);
651 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
652 lock_flags, 0, NULL);
653 LDLM_RESOURCE_DELREF(res);
654 ldlm_resource_putref(res);
658 static int osc_destroy_interpret(const struct lu_env *env,
659 struct ptlrpc_request *req, void *data,
662 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
664 atomic_dec(&cli->cl_destroy_in_flight);
665 cfs_waitq_signal(&cli->cl_destroy_waitq);
669 static int osc_can_send_destroy(struct client_obd *cli)
671 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
672 cli->cl_max_rpcs_in_flight) {
673 /* The destroy request can be sent */
676 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
677 cli->cl_max_rpcs_in_flight) {
679 * The counter has been modified between the two atomic
682 cfs_waitq_signal(&cli->cl_destroy_waitq);
687 /* Destroy requests can be async always on the client, and we don't even really
688 * care about the return code since the client cannot do anything at all about
690 * When the MDS is unlinking a filename, it saves the file objects into a
691 * recovery llog, and these object records are cancelled when the OST reports
692 * they were destroyed and sync'd to disk (i.e. transaction committed).
693 * If the client dies, or the OST is down when the object should be destroyed,
694 * the records are not cancelled, and when the OST reconnects to the MDS next,
695 * it will retrieve the llog unlink logs and then sends the log cancellation
696 * cookies to the MDS after committing destroy transactions. */
697 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
698 struct lov_stripe_md *ea, struct obd_trans_info *oti,
699 struct obd_export *md_export, void *capa)
701 struct client_obd *cli = &exp->exp_obd->u.cli;
702 struct ptlrpc_request *req;
703 struct ost_body *body;
704 CFS_LIST_HEAD(cancels);
709 CDEBUG(D_INFO, "oa NULL\n");
713 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
714 LDLM_FL_DISCARD_DATA);
716 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
718 ldlm_lock_list_put(&cancels, l_bl_ast, count);
722 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
723 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
726 ptlrpc_request_free(req);
730 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
731 ptlrpc_at_set_req_timeout(req);
733 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
734 oa->o_lcookie = *oti->oti_logcookies;
735 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
739 osc_pack_capa(req, body, (struct obd_capa *)capa);
740 ptlrpc_request_set_replen(req);
742 /* don't throttle destroy RPCs for the MDT */
743 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
744 req->rq_interpret_reply = osc_destroy_interpret;
745 if (!osc_can_send_destroy(cli)) {
746 struct l_wait_info lwi = { 0 };
749 * Wait until the number of on-going destroy RPCs drops
750 * under max_rpc_in_flight
752 l_wait_event_exclusive(cli->cl_destroy_waitq,
753 osc_can_send_destroy(cli), &lwi);
757 /* Do not wait for response */
758 ptlrpcd_add_req(req, PSCOPE_OTHER);
762 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
765 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
767 LASSERT(!(oa->o_valid & bits));
770 client_obd_list_lock(&cli->cl_loi_list_lock);
771 oa->o_dirty = cli->cl_dirty;
772 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
773 CERROR("dirty %lu - %lu > dirty_max %lu\n",
774 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
776 } else if (atomic_read(&obd_dirty_pages) -
777 atomic_read(&obd_dirty_transit_pages) > obd_max_dirty_pages){
778 CERROR("dirty %d - %d > system dirty_max %d\n",
779 atomic_read(&obd_dirty_pages),
780 atomic_read(&obd_dirty_transit_pages),
781 obd_max_dirty_pages);
783 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
784 CERROR("dirty %lu - dirty_max %lu too big???\n",
785 cli->cl_dirty, cli->cl_dirty_max);
788 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
789 (cli->cl_max_rpcs_in_flight + 1);
790 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
792 oa->o_grant = cli->cl_avail_grant;
793 oa->o_dropped = cli->cl_lost_grant;
794 cli->cl_lost_grant = 0;
795 client_obd_list_unlock(&cli->cl_loi_list_lock);
796 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
797 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
801 static void osc_update_next_shrink(struct client_obd *cli)
803 int time = GRANT_SHRINK_INTERVAL;
804 cli->cl_next_shrink_grant = cfs_time_shift(time);
805 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
806 cli->cl_next_shrink_grant);
809 /* caller must hold loi_list_lock */
810 static void osc_consume_write_grant(struct client_obd *cli,
811 struct brw_page *pga)
813 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock);
814 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
815 atomic_inc(&obd_dirty_pages);
816 cli->cl_dirty += CFS_PAGE_SIZE;
817 cli->cl_avail_grant -= CFS_PAGE_SIZE;
818 pga->flag |= OBD_BRW_FROM_GRANT;
819 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
820 CFS_PAGE_SIZE, pga, pga->pg);
821 LASSERT(cli->cl_avail_grant >= 0);
822 osc_update_next_shrink(cli);
825 /* the companion to osc_consume_write_grant, called when a brw has completed.
826 * must be called with the loi lock held. */
827 static void osc_release_write_grant(struct client_obd *cli,
828 struct brw_page *pga, int sent)
830 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
833 LASSERT_SPIN_LOCKED(&cli->cl_loi_list_lock);
834 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
839 pga->flag &= ~OBD_BRW_FROM_GRANT;
840 atomic_dec(&obd_dirty_pages);
841 cli->cl_dirty -= CFS_PAGE_SIZE;
842 if (pga->flag & OBD_BRW_NOCACHE) {
843 pga->flag &= ~OBD_BRW_NOCACHE;
844 atomic_dec(&obd_dirty_transit_pages);
845 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
848 cli->cl_lost_grant += CFS_PAGE_SIZE;
849 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
850 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
851 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
852 /* For short writes we shouldn't count parts of pages that
853 * span a whole block on the OST side, or our accounting goes
854 * wrong. Should match the code in filter_grant_check. */
855 int offset = pga->off & ~CFS_PAGE_MASK;
856 int count = pga->count + (offset & (blocksize - 1));
857 int end = (offset + pga->count) & (blocksize - 1);
859 count += blocksize - end;
861 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
862 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
863 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
864 cli->cl_avail_grant, cli->cl_dirty);
870 static unsigned long rpcs_in_flight(struct client_obd *cli)
872 return cli->cl_r_in_flight + cli->cl_w_in_flight;
875 /* caller must hold loi_list_lock */
876 void osc_wake_cache_waiters(struct client_obd *cli)
878 struct list_head *l, *tmp;
879 struct osc_cache_waiter *ocw;
882 list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
883 /* if we can't dirty more, we must wait until some is written */
884 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
885 (atomic_read(&obd_dirty_pages) + 1 > 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 = list_entry(l, struct osc_cache_waiter, ocw_entry);
901 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 static int osc_shrink_grant(struct client_obd *cli)
970 struct ost_body *body;
977 osc_announce_cached(cli, &body->oa, 0);
978 osc_shrink_grant_local(cli, &body->oa);
979 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
980 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
981 sizeof(*body), body, NULL);
983 __osc_update_grant(cli, body->oa.o_grant);
989 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
990 static int osc_should_shrink_grant(struct client_obd *client)
992 cfs_time_t time = cfs_time_current();
993 cfs_time_t next_shrink = client->cl_next_shrink_grant;
994 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
995 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
996 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
999 osc_update_next_shrink(client);
1004 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1006 struct client_obd *client;
1008 list_for_each_entry(client, &item->ti_obd_list, cl_grant_shrink_list) {
1009 if (osc_should_shrink_grant(client))
1010 osc_shrink_grant(client);
1015 static int osc_add_shrink_grant(struct client_obd *client)
1019 rc = ptlrpc_add_timeout_client(GRANT_SHRINK_INTERVAL,
1021 osc_grant_shrink_grant_cb, NULL,
1022 &client->cl_grant_shrink_list);
1024 CERROR("add grant client %s error %d\n",
1025 client->cl_import->imp_obd->obd_name, rc);
1028 CDEBUG(D_CACHE, "add grant client %s \n",
1029 client->cl_import->imp_obd->obd_name);
1030 osc_update_next_shrink(client);
1034 static int osc_del_shrink_grant(struct client_obd *client)
1036 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1040 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1042 client_obd_list_lock(&cli->cl_loi_list_lock);
1043 cli->cl_avail_grant = ocd->ocd_grant;
1044 client_obd_list_unlock(&cli->cl_loi_list_lock);
1046 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1047 list_empty(&cli->cl_grant_shrink_list))
1048 osc_add_shrink_grant(cli);
1050 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1051 cli->cl_avail_grant, cli->cl_lost_grant);
1052 LASSERT(cli->cl_avail_grant >= 0);
1055 /* We assume that the reason this OSC got a short read is because it read
1056 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1057 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1058 * this stripe never got written at or beyond this stripe offset yet. */
1059 static void handle_short_read(int nob_read, obd_count page_count,
1060 struct brw_page **pga)
1065 /* skip bytes read OK */
1066 while (nob_read > 0) {
1067 LASSERT (page_count > 0);
1069 if (pga[i]->count > nob_read) {
1070 /* EOF inside this page */
1071 ptr = cfs_kmap(pga[i]->pg) +
1072 (pga[i]->off & ~CFS_PAGE_MASK);
1073 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1074 cfs_kunmap(pga[i]->pg);
1080 nob_read -= pga[i]->count;
1085 /* zero remaining pages */
1086 while (page_count-- > 0) {
1087 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1088 memset(ptr, 0, pga[i]->count);
1089 cfs_kunmap(pga[i]->pg);
1094 static int check_write_rcs(struct ptlrpc_request *req,
1095 int requested_nob, int niocount,
1096 obd_count page_count, struct brw_page **pga)
1100 /* return error if any niobuf was in error */
1101 remote_rcs = lustre_swab_repbuf(req, REQ_REC_OFF + 1,
1102 sizeof(*remote_rcs) * niocount, NULL);
1103 if (remote_rcs == NULL) {
1104 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1107 if (lustre_msg_swabbed(req->rq_repmsg))
1108 for (i = 0; i < niocount; i++)
1109 __swab32s(&remote_rcs[i]);
1111 for (i = 0; i < niocount; i++) {
1112 if (remote_rcs[i] < 0)
1113 return(remote_rcs[i]);
1115 if (remote_rcs[i] != 0) {
1116 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1117 i, remote_rcs[i], req);
1122 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1123 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1124 req->rq_bulk->bd_nob_transferred, requested_nob);
1131 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1133 if (p1->flag != p2->flag) {
1134 unsigned mask = ~(OBD_BRW_FROM_GRANT|
1135 OBD_BRW_NOCACHE|OBD_BRW_SYNC);
1137 /* warn if we try to combine flags that we don't know to be
1138 * safe to combine */
1139 if ((p1->flag & mask) != (p2->flag & mask))
1140 CERROR("is it ok to have flags 0x%x and 0x%x in the "
1141 "same brw?\n", p1->flag, p2->flag);
1145 return (p1->off + p1->count == p2->off);
1148 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1149 struct brw_page **pga, int opc,
1150 cksum_type_t cksum_type)
1155 LASSERT (pg_count > 0);
1156 cksum = init_checksum(cksum_type);
1157 while (nob > 0 && pg_count > 0) {
1158 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1159 int off = pga[i]->off & ~CFS_PAGE_MASK;
1160 int count = pga[i]->count > nob ? nob : pga[i]->count;
1162 /* corrupt the data before we compute the checksum, to
1163 * simulate an OST->client data error */
1164 if (i == 0 && opc == OST_READ &&
1165 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1166 memcpy(ptr + off, "bad1", min(4, nob));
1167 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1168 cfs_kunmap(pga[i]->pg);
1169 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1172 nob -= pga[i]->count;
1176 /* For sending we only compute the wrong checksum instead
1177 * of corrupting the data so it is still correct on a redo */
1178 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1184 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1185 struct lov_stripe_md *lsm, obd_count page_count,
1186 struct brw_page **pga,
1187 struct ptlrpc_request **reqp,
1188 struct obd_capa *ocapa, int reserve)
1190 struct ptlrpc_request *req;
1191 struct ptlrpc_bulk_desc *desc;
1192 struct ost_body *body;
1193 struct obd_ioobj *ioobj;
1194 struct niobuf_remote *niobuf;
1195 int niocount, i, requested_nob, opc, rc;
1196 struct osc_brw_async_args *aa;
1197 struct req_capsule *pill;
1198 struct brw_page *pg_prev;
1201 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1202 RETURN(-ENOMEM); /* Recoverable */
1203 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1204 RETURN(-EINVAL); /* Fatal */
1206 if ((cmd & OBD_BRW_WRITE) != 0) {
1208 req = ptlrpc_request_alloc_pool(cli->cl_import,
1209 cli->cl_import->imp_rq_pool,
1213 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW);
1218 for (niocount = i = 1; i < page_count; i++) {
1219 if (!can_merge_pages(pga[i - 1], pga[i]))
1223 pill = &req->rq_pill;
1224 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1225 niocount * sizeof(*niobuf));
1226 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1228 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1230 ptlrpc_request_free(req);
1233 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1234 ptlrpc_at_set_req_timeout(req);
1236 if (opc == OST_WRITE)
1237 desc = ptlrpc_prep_bulk_imp(req, page_count,
1238 BULK_GET_SOURCE, OST_BULK_PORTAL);
1240 desc = ptlrpc_prep_bulk_imp(req, page_count,
1241 BULK_PUT_SINK, OST_BULK_PORTAL);
1244 GOTO(out, rc = -ENOMEM);
1245 /* NB request now owns desc and will free it when it gets freed */
1247 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1248 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1249 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1250 LASSERT(body && ioobj && niobuf);
1254 obdo_to_ioobj(oa, ioobj);
1255 ioobj->ioo_bufcnt = niocount;
1256 osc_pack_capa(req, body, ocapa);
1257 LASSERT (page_count > 0);
1259 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1260 struct brw_page *pg = pga[i];
1262 LASSERT(pg->count > 0);
1263 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1264 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1265 pg->off, pg->count);
1267 LASSERTF(i == 0 || pg->off > pg_prev->off,
1268 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1269 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1271 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1272 pg_prev->pg, page_private(pg_prev->pg),
1273 pg_prev->pg->index, pg_prev->off);
1275 LASSERTF(i == 0 || pg->off > pg_prev->off,
1276 "i %d p_c %u\n", i, page_count);
1278 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1279 (pg->flag & OBD_BRW_SRVLOCK));
1281 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1283 requested_nob += pg->count;
1285 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1287 niobuf->len += pg->count;
1289 niobuf->offset = pg->off;
1290 niobuf->len = pg->count;
1291 niobuf->flags = pg->flag;
1296 LASSERTF((void *)(niobuf - niocount) ==
1297 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1298 niocount * sizeof(*niobuf)),
1299 "want %p - real %p\n", lustre_msg_buf(req->rq_reqmsg,
1300 REQ_REC_OFF + 2, niocount * sizeof(*niobuf)),
1301 (void *)(niobuf - niocount));
1303 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1304 if (osc_should_shrink_grant(cli))
1305 osc_shrink_grant_local(cli, &body->oa);
1307 /* size[REQ_REC_OFF] still sizeof (*body) */
1308 if (opc == OST_WRITE) {
1309 if (unlikely(cli->cl_checksum) &&
1310 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1311 /* store cl_cksum_type in a local variable since
1312 * it can be changed via lprocfs */
1313 cksum_type_t cksum_type = cli->cl_cksum_type;
1315 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1316 oa->o_flags = body->oa.o_flags = 0;
1317 body->oa.o_flags |= cksum_type_pack(cksum_type);
1318 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1319 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1323 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1325 /* save this in 'oa', too, for later checking */
1326 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1327 oa->o_flags |= cksum_type_pack(cksum_type);
1329 /* clear out the checksum flag, in case this is a
1330 * resend but cl_checksum is no longer set. b=11238 */
1331 oa->o_valid &= ~OBD_MD_FLCKSUM;
1333 oa->o_cksum = body->oa.o_cksum;
1334 /* 1 RC per niobuf */
1335 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER,
1336 sizeof(__u32) * niocount);
1338 if (unlikely(cli->cl_checksum) &&
1339 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1340 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1341 body->oa.o_flags = 0;
1342 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1343 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1345 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER, 0);
1346 /* 1 RC for the whole I/O */
1348 ptlrpc_request_set_replen(req);
1350 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1351 aa = ptlrpc_req_async_args(req);
1353 aa->aa_requested_nob = requested_nob;
1354 aa->aa_nio_count = niocount;
1355 aa->aa_page_count = page_count;
1359 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1360 if (ocapa && reserve)
1361 aa->aa_ocapa = capa_get(ocapa);
1367 ptlrpc_req_finished(req);
1371 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1372 __u32 client_cksum, __u32 server_cksum, int nob,
1373 obd_count page_count, struct brw_page **pga,
1374 cksum_type_t client_cksum_type)
1378 cksum_type_t cksum_type;
1380 if (server_cksum == client_cksum) {
1381 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1385 if (oa->o_valid & OBD_MD_FLFLAGS)
1386 cksum_type = cksum_type_unpack(oa->o_flags);
1388 cksum_type = OBD_CKSUM_CRC32;
1390 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1393 if (cksum_type != client_cksum_type)
1394 msg = "the server did not use the checksum type specified in "
1395 "the original request - likely a protocol problem";
1396 else if (new_cksum == server_cksum)
1397 msg = "changed on the client after we checksummed it - "
1398 "likely false positive due to mmap IO (bug 11742)";
1399 else if (new_cksum == client_cksum)
1400 msg = "changed in transit before arrival at OST";
1402 msg = "changed in transit AND doesn't match the original - "
1403 "likely false positive due to mmap IO (bug 11742)";
1405 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1406 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1407 "["LPU64"-"LPU64"]\n",
1408 msg, libcfs_nid2str(peer->nid),
1409 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1410 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1413 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1415 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1416 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1417 "client csum now %x\n", client_cksum, client_cksum_type,
1418 server_cksum, cksum_type, new_cksum);
1422 /* Note rc enters this function as number of bytes transferred */
1423 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1425 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1426 const lnet_process_id_t *peer =
1427 &req->rq_import->imp_connection->c_peer;
1428 struct client_obd *cli = aa->aa_cli;
1429 struct ost_body *body;
1430 __u32 client_cksum = 0;
1433 if (rc < 0 && rc != -EDQUOT)
1436 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1437 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1438 lustre_swab_ost_body);
1440 CDEBUG(D_INFO, "Can't unpack body\n");
1444 /* set/clear over quota flag for a uid/gid */
1445 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1446 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA))
1447 lquota_setdq(quota_interface, cli, body->oa.o_uid,
1448 body->oa.o_gid, body->oa.o_valid,
1454 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1455 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1457 osc_update_grant(cli, body);
1459 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1461 CERROR("Unexpected +ve rc %d\n", rc);
1464 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1466 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1469 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1470 check_write_checksum(&body->oa, peer, client_cksum,
1471 body->oa.o_cksum, aa->aa_requested_nob,
1472 aa->aa_page_count, aa->aa_ppga,
1473 cksum_type_unpack(aa->aa_oa->o_flags)))
1476 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1477 aa->aa_page_count, aa->aa_ppga);
1481 /* The rest of this function executes only for OST_READs */
1483 /* if unwrap_bulk failed, return -EAGAIN to retry */
1484 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1486 GOTO(out, rc = -EAGAIN);
1488 if (rc > aa->aa_requested_nob) {
1489 CERROR("Unexpected rc %d (%d requested)\n", rc,
1490 aa->aa_requested_nob);
1494 if (rc != req->rq_bulk->bd_nob_transferred) {
1495 CERROR ("Unexpected rc %d (%d transferred)\n",
1496 rc, req->rq_bulk->bd_nob_transferred);
1500 if (rc < aa->aa_requested_nob)
1501 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1503 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1504 static int cksum_counter;
1505 __u32 server_cksum = body->oa.o_cksum;
1508 cksum_type_t cksum_type;
1510 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1511 cksum_type = cksum_type_unpack(body->oa.o_flags);
1513 cksum_type = OBD_CKSUM_CRC32;
1514 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1515 aa->aa_ppga, OST_READ,
1518 if (peer->nid == req->rq_bulk->bd_sender) {
1522 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1525 if (server_cksum == ~0 && rc > 0) {
1526 CERROR("Protocol error: server %s set the 'checksum' "
1527 "bit, but didn't send a checksum. Not fatal, "
1528 "but please notify on http://bugzilla.lustre.org/\n",
1529 libcfs_nid2str(peer->nid));
1530 } else if (server_cksum != client_cksum) {
1531 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1532 "%s%s%s inum "LPU64"/"LPU64" object "
1533 LPU64"/"LPU64" extent "
1534 "["LPU64"-"LPU64"]\n",
1535 req->rq_import->imp_obd->obd_name,
1536 libcfs_nid2str(peer->nid),
1538 body->oa.o_valid & OBD_MD_FLFID ?
1539 body->oa.o_fid : (__u64)0,
1540 body->oa.o_valid & OBD_MD_FLFID ?
1541 body->oa.o_generation :(__u64)0,
1543 body->oa.o_valid & OBD_MD_FLGROUP ?
1544 body->oa.o_gr : (__u64)0,
1545 aa->aa_ppga[0]->off,
1546 aa->aa_ppga[aa->aa_page_count-1]->off +
1547 aa->aa_ppga[aa->aa_page_count-1]->count -
1549 CERROR("client %x, server %x, cksum_type %x\n",
1550 client_cksum, server_cksum, cksum_type);
1552 aa->aa_oa->o_cksum = client_cksum;
1556 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1559 } else if (unlikely(client_cksum)) {
1560 static int cksum_missed;
1563 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1564 CERROR("Checksum %u requested from %s but not sent\n",
1565 cksum_missed, libcfs_nid2str(peer->nid));
1571 *aa->aa_oa = body->oa;
1576 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1577 struct lov_stripe_md *lsm,
1578 obd_count page_count, struct brw_page **pga,
1579 struct obd_capa *ocapa)
1581 struct ptlrpc_request *req;
1585 struct l_wait_info lwi;
1589 cfs_waitq_init(&waitq);
1592 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1593 page_count, pga, &req, ocapa, 0);
1597 rc = ptlrpc_queue_wait(req);
1599 if (rc == -ETIMEDOUT && req->rq_resend) {
1600 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1601 ptlrpc_req_finished(req);
1605 rc = osc_brw_fini_request(req, rc);
1607 ptlrpc_req_finished(req);
1608 if (osc_recoverable_error(rc)) {
1610 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1611 CERROR("too many resend retries, returning error\n");
1615 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1616 l_wait_event(waitq, 0, &lwi);
1624 int osc_brw_redo_request(struct ptlrpc_request *request,
1625 struct osc_brw_async_args *aa)
1627 struct ptlrpc_request *new_req;
1628 struct ptlrpc_request_set *set = request->rq_set;
1629 struct osc_brw_async_args *new_aa;
1630 struct osc_async_page *oap;
1634 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1635 CERROR("too many resend retries, returning error\n");
1639 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1641 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1642 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1643 aa->aa_cli, aa->aa_oa,
1644 NULL /* lsm unused by osc currently */,
1645 aa->aa_page_count, aa->aa_ppga,
1646 &new_req, aa->aa_ocapa, 0);
1650 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1652 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1653 if (oap->oap_request != NULL) {
1654 LASSERTF(request == oap->oap_request,
1655 "request %p != oap_request %p\n",
1656 request, oap->oap_request);
1657 if (oap->oap_interrupted) {
1658 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1659 ptlrpc_req_finished(new_req);
1664 /* New request takes over pga and oaps from old request.
1665 * Note that copying a list_head doesn't work, need to move it... */
1667 new_req->rq_interpret_reply = request->rq_interpret_reply;
1668 new_req->rq_async_args = request->rq_async_args;
1669 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1671 new_aa = ptlrpc_req_async_args(new_req);
1673 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1674 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1675 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1677 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1678 if (oap->oap_request) {
1679 ptlrpc_req_finished(oap->oap_request);
1680 oap->oap_request = ptlrpc_request_addref(new_req);
1684 new_aa->aa_ocapa = aa->aa_ocapa;
1685 aa->aa_ocapa = NULL;
1687 /* use ptlrpc_set_add_req is safe because interpret functions work
1688 * in check_set context. only one way exist with access to request
1689 * from different thread got -EINTR - this way protected with
1690 * cl_loi_list_lock */
1691 ptlrpc_set_add_req(set, new_req);
1693 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1695 DEBUG_REQ(D_INFO, new_req, "new request");
1700 * ugh, we want disk allocation on the target to happen in offset order. we'll
1701 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1702 * fine for our small page arrays and doesn't require allocation. its an
1703 * insertion sort that swaps elements that are strides apart, shrinking the
1704 * stride down until its '1' and the array is sorted.
1706 static void sort_brw_pages(struct brw_page **array, int num)
1709 struct brw_page *tmp;
1713 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1718 for (i = stride ; i < num ; i++) {
1721 while (j >= stride && array[j - stride]->off > tmp->off) {
1722 array[j] = array[j - stride];
1727 } while (stride > 1);
1730 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1736 LASSERT (pages > 0);
1737 offset = pg[i]->off & ~CFS_PAGE_MASK;
1741 if (pages == 0) /* that's all */
1744 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1745 return count; /* doesn't end on page boundary */
1748 offset = pg[i]->off & ~CFS_PAGE_MASK;
1749 if (offset != 0) /* doesn't start on page boundary */
1756 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1758 struct brw_page **ppga;
1761 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1765 for (i = 0; i < count; i++)
1770 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1772 LASSERT(ppga != NULL);
1773 OBD_FREE(ppga, sizeof(*ppga) * count);
1776 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1777 obd_count page_count, struct brw_page *pga,
1778 struct obd_trans_info *oti)
1780 struct obdo *saved_oa = NULL;
1781 struct brw_page **ppga, **orig;
1782 struct obd_import *imp = class_exp2cliimp(exp);
1783 struct client_obd *cli;
1784 int rc, page_count_orig;
1787 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1788 cli = &imp->imp_obd->u.cli;
1790 if (cmd & OBD_BRW_CHECK) {
1791 /* The caller just wants to know if there's a chance that this
1792 * I/O can succeed */
1794 if (imp->imp_invalid)
1799 /* test_brw with a failed create can trip this, maybe others. */
1800 LASSERT(cli->cl_max_pages_per_rpc);
1804 orig = ppga = osc_build_ppga(pga, page_count);
1807 page_count_orig = page_count;
1809 sort_brw_pages(ppga, page_count);
1810 while (page_count) {
1811 obd_count pages_per_brw;
1813 if (page_count > cli->cl_max_pages_per_rpc)
1814 pages_per_brw = cli->cl_max_pages_per_rpc;
1816 pages_per_brw = page_count;
1818 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1820 if (saved_oa != NULL) {
1821 /* restore previously saved oa */
1822 *oinfo->oi_oa = *saved_oa;
1823 } else if (page_count > pages_per_brw) {
1824 /* save a copy of oa (brw will clobber it) */
1825 OBDO_ALLOC(saved_oa);
1826 if (saved_oa == NULL)
1827 GOTO(out, rc = -ENOMEM);
1828 *saved_oa = *oinfo->oi_oa;
1831 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1832 pages_per_brw, ppga, oinfo->oi_capa);
1837 page_count -= pages_per_brw;
1838 ppga += pages_per_brw;
1842 osc_release_ppga(orig, page_count_orig);
1844 if (saved_oa != NULL)
1845 OBDO_FREE(saved_oa);
1850 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1851 * the dirty accounting. Writeback completes or truncate happens before
1852 * writing starts. Must be called with the loi lock held. */
1853 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1856 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1860 /* This maintains the lists of pending pages to read/write for a given object
1861 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1862 * to quickly find objects that are ready to send an RPC. */
1863 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1869 if (lop->lop_num_pending == 0)
1872 /* if we have an invalid import we want to drain the queued pages
1873 * by forcing them through rpcs that immediately fail and complete
1874 * the pages. recovery relies on this to empty the queued pages
1875 * before canceling the locks and evicting down the llite pages */
1876 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1879 /* stream rpcs in queue order as long as as there is an urgent page
1880 * queued. this is our cheap solution for good batching in the case
1881 * where writepage marks some random page in the middle of the file
1882 * as urgent because of, say, memory pressure */
1883 if (!list_empty(&lop->lop_urgent)) {
1884 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1887 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1888 optimal = cli->cl_max_pages_per_rpc;
1889 if (cmd & OBD_BRW_WRITE) {
1890 /* trigger a write rpc stream as long as there are dirtiers
1891 * waiting for space. as they're waiting, they're not going to
1892 * create more pages to coallesce with what's waiting.. */
1893 if (!list_empty(&cli->cl_cache_waiters)) {
1894 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1897 /* +16 to avoid triggering rpcs that would want to include pages
1898 * that are being queued but which can't be made ready until
1899 * the queuer finishes with the page. this is a wart for
1900 * llite::commit_write() */
1903 if (lop->lop_num_pending >= optimal)
1909 static int lop_makes_hprpc(struct loi_oap_pages *lop)
1911 struct osc_async_page *oap;
1914 if (list_empty(&lop->lop_urgent))
1917 oap = list_entry(lop->lop_urgent.next,
1918 struct osc_async_page, oap_urgent_item);
1920 if (oap->oap_async_flags & ASYNC_HP) {
1921 CDEBUG(D_CACHE, "hp request forcing RPC\n");
1928 static void on_list(struct list_head *item, struct list_head *list,
1931 if (list_empty(item) && should_be_on)
1932 list_add_tail(item, list);
1933 else if (!list_empty(item) && !should_be_on)
1934 list_del_init(item);
1937 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1938 * can find pages to build into rpcs quickly */
1939 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1941 if (lop_makes_hprpc(&loi->loi_write_lop) ||
1942 lop_makes_hprpc(&loi->loi_read_lop)) {
1944 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
1945 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
1947 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
1948 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
1949 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
1950 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1953 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1954 loi->loi_write_lop.lop_num_pending);
1956 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1957 loi->loi_read_lop.lop_num_pending);
1960 static void lop_update_pending(struct client_obd *cli,
1961 struct loi_oap_pages *lop, int cmd, int delta)
1963 lop->lop_num_pending += delta;
1964 if (cmd & OBD_BRW_WRITE)
1965 cli->cl_pending_w_pages += delta;
1967 cli->cl_pending_r_pages += delta;
1971 * this is called when a sync waiter receives an interruption. Its job is to
1972 * get the caller woken as soon as possible. If its page hasn't been put in an
1973 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
1974 * desiring interruption which will forcefully complete the rpc once the rpc
1977 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
1979 struct loi_oap_pages *lop;
1980 struct lov_oinfo *loi;
1984 LASSERT(!oap->oap_interrupted);
1985 oap->oap_interrupted = 1;
1987 /* ok, it's been put in an rpc. only one oap gets a request reference */
1988 if (oap->oap_request != NULL) {
1989 ptlrpc_mark_interrupted(oap->oap_request);
1990 ptlrpcd_wake(oap->oap_request);
1991 ptlrpc_req_finished(oap->oap_request);
1992 oap->oap_request = NULL;
1996 * page completion may be called only if ->cpo_prep() method was
1997 * executed by osc_io_submit(), that also adds page the to pending list
1999 if (!list_empty(&oap->oap_pending_item)) {
2000 list_del_init(&oap->oap_pending_item);
2001 list_del_init(&oap->oap_urgent_item);
2004 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2005 &loi->loi_write_lop : &loi->loi_read_lop;
2006 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2007 loi_list_maint(oap->oap_cli, oap->oap_loi);
2008 rc = oap->oap_caller_ops->ap_completion(env,
2009 oap->oap_caller_data,
2010 oap->oap_cmd, NULL, -EINTR);
2016 /* this is trying to propogate async writeback errors back up to the
2017 * application. As an async write fails we record the error code for later if
2018 * the app does an fsync. As long as errors persist we force future rpcs to be
2019 * sync so that the app can get a sync error and break the cycle of queueing
2020 * pages for which writeback will fail. */
2021 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2028 ar->ar_force_sync = 1;
2029 ar->ar_min_xid = ptlrpc_sample_next_xid();
2034 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2035 ar->ar_force_sync = 0;
2038 void osc_oap_to_pending(struct osc_async_page *oap)
2040 struct loi_oap_pages *lop;
2042 if (oap->oap_cmd & OBD_BRW_WRITE)
2043 lop = &oap->oap_loi->loi_write_lop;
2045 lop = &oap->oap_loi->loi_read_lop;
2047 if (oap->oap_async_flags & ASYNC_HP)
2048 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2049 else if (oap->oap_async_flags & ASYNC_URGENT)
2050 list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2051 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2052 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2055 /* this must be called holding the loi list lock to give coverage to exit_cache,
2056 * async_flag maintenance, and oap_request */
2057 static void osc_ap_completion(const struct lu_env *env,
2058 struct client_obd *cli, struct obdo *oa,
2059 struct osc_async_page *oap, int sent, int rc)
2064 if (oap->oap_request != NULL) {
2065 xid = ptlrpc_req_xid(oap->oap_request);
2066 ptlrpc_req_finished(oap->oap_request);
2067 oap->oap_request = NULL;
2070 oap->oap_async_flags = 0;
2071 oap->oap_interrupted = 0;
2073 if (oap->oap_cmd & OBD_BRW_WRITE) {
2074 osc_process_ar(&cli->cl_ar, xid, rc);
2075 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2078 if (rc == 0 && oa != NULL) {
2079 if (oa->o_valid & OBD_MD_FLBLOCKS)
2080 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2081 if (oa->o_valid & OBD_MD_FLMTIME)
2082 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2083 if (oa->o_valid & OBD_MD_FLATIME)
2084 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2085 if (oa->o_valid & OBD_MD_FLCTIME)
2086 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2089 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2090 oap->oap_cmd, oa, rc);
2092 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2093 * I/O on the page could start, but OSC calls it under lock
2094 * and thus we can add oap back to pending safely */
2096 /* upper layer wants to leave the page on pending queue */
2097 osc_oap_to_pending(oap);
2099 osc_exit_cache(cli, oap, sent);
2103 static int brw_interpret(const struct lu_env *env,
2104 struct ptlrpc_request *req, void *data, int rc)
2106 struct osc_brw_async_args *aa = data;
2107 struct client_obd *cli;
2111 rc = osc_brw_fini_request(req, rc);
2112 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2113 if (osc_recoverable_error(rc)) {
2114 rc = osc_brw_redo_request(req, aa);
2120 capa_put(aa->aa_ocapa);
2121 aa->aa_ocapa = NULL;
2126 client_obd_list_lock(&cli->cl_loi_list_lock);
2128 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2129 * is called so we know whether to go to sync BRWs or wait for more
2130 * RPCs to complete */
2131 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2132 cli->cl_w_in_flight--;
2134 cli->cl_r_in_flight--;
2136 async = list_empty(&aa->aa_oaps);
2137 if (!async) { /* from osc_send_oap_rpc() */
2138 struct osc_async_page *oap, *tmp;
2139 /* the caller may re-use the oap after the completion call so
2140 * we need to clean it up a little */
2141 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
2142 list_del_init(&oap->oap_rpc_item);
2143 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2145 OBDO_FREE(aa->aa_oa);
2146 } else { /* from async_internal() */
2148 for (i = 0; i < aa->aa_page_count; i++)
2149 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2151 osc_wake_cache_waiters(cli);
2152 osc_check_rpcs(env, cli);
2153 client_obd_list_unlock(&cli->cl_loi_list_lock);
2155 cl_req_completion(env, aa->aa_clerq, rc);
2156 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2160 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2161 struct client_obd *cli,
2162 struct list_head *rpc_list,
2163 int page_count, int cmd)
2165 struct ptlrpc_request *req;
2166 struct brw_page **pga = NULL;
2167 struct osc_brw_async_args *aa;
2168 struct obdo *oa = NULL;
2169 const struct obd_async_page_ops *ops = NULL;
2170 void *caller_data = NULL;
2171 struct osc_async_page *oap;
2172 struct osc_async_page *tmp;
2173 struct ost_body *body;
2174 struct cl_req *clerq = NULL;
2175 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2176 struct ldlm_lock *lock = NULL;
2177 struct cl_req_attr crattr;
2181 LASSERT(!list_empty(rpc_list));
2183 memset(&crattr, 0, sizeof crattr);
2184 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2186 GOTO(out, req = ERR_PTR(-ENOMEM));
2190 GOTO(out, req = ERR_PTR(-ENOMEM));
2193 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2194 struct cl_page *page = osc_oap2cl_page(oap);
2196 ops = oap->oap_caller_ops;
2197 caller_data = oap->oap_caller_data;
2199 clerq = cl_req_alloc(env, page, crt,
2200 1 /* only 1-object rpcs for
2203 GOTO(out, req = (void *)clerq);
2204 lock = oap->oap_ldlm_lock;
2206 pga[i] = &oap->oap_brw_page;
2207 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2208 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2209 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2211 cl_req_page_add(env, clerq, page);
2214 /* always get the data for the obdo for the rpc */
2215 LASSERT(ops != NULL);
2217 crattr.cra_capa = NULL;
2218 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2220 oa->o_handle = lock->l_remote_handle;
2221 oa->o_valid |= OBD_MD_FLHANDLE;
2224 rc = cl_req_prep(env, clerq);
2226 CERROR("cl_req_prep failed: %d\n", rc);
2227 GOTO(out, req = ERR_PTR(rc));
2230 sort_brw_pages(pga, page_count);
2231 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2232 pga, &req, crattr.cra_capa, 1);
2234 CERROR("prep_req failed: %d\n", rc);
2235 GOTO(out, req = ERR_PTR(rc));
2238 /* Need to update the timestamps after the request is built in case
2239 * we race with setattr (locally or in queue at OST). If OST gets
2240 * later setattr before earlier BRW (as determined by the request xid),
2241 * the OST will not use BRW timestamps. Sadly, there is no obvious
2242 * way to do this in a single call. bug 10150 */
2243 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2244 cl_req_attr_set(env, clerq, &crattr,
2245 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2247 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2248 aa = ptlrpc_req_async_args(req);
2249 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2250 list_splice(rpc_list, &aa->aa_oaps);
2251 CFS_INIT_LIST_HEAD(rpc_list);
2252 aa->aa_clerq = clerq;
2254 capa_put(crattr.cra_capa);
2259 OBD_FREE(pga, sizeof(*pga) * page_count);
2260 /* this should happen rarely and is pretty bad, it makes the
2261 * pending list not follow the dirty order */
2262 client_obd_list_lock(&cli->cl_loi_list_lock);
2263 list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2264 list_del_init(&oap->oap_rpc_item);
2266 /* queued sync pages can be torn down while the pages
2267 * were between the pending list and the rpc */
2268 if (oap->oap_interrupted) {
2269 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2270 osc_ap_completion(env, cli, NULL, oap, 0,
2274 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2276 if (clerq && !IS_ERR(clerq))
2277 cl_req_completion(env, clerq, PTR_ERR(req));
2283 * prepare pages for ASYNC io and put pages in send queue.
2287 * \param cmd - OBD_BRW_* macroses
2288 * \param lop - pending pages
2290 * \return zero if pages successfully add to send queue.
2291 * \return not zere if error occurring.
2294 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2295 struct lov_oinfo *loi,
2296 int cmd, struct loi_oap_pages *lop)
2298 struct ptlrpc_request *req;
2299 obd_count page_count = 0;
2300 struct osc_async_page *oap = NULL, *tmp;
2301 struct osc_brw_async_args *aa;
2302 const struct obd_async_page_ops *ops;
2303 CFS_LIST_HEAD(rpc_list);
2304 unsigned int ending_offset;
2305 unsigned starting_offset = 0;
2307 struct cl_object *clob = NULL;
2310 /* If there are HP OAPs we need to handle at least 1 of them,
2311 * move it the beginning of the pending list for that. */
2312 if (!list_empty(&lop->lop_urgent)) {
2313 oap = list_entry(lop->lop_urgent.next,
2314 struct osc_async_page, oap_urgent_item);
2315 if (oap->oap_async_flags & ASYNC_HP)
2316 list_move(&oap->oap_pending_item, &lop->lop_pending);
2319 /* first we find the pages we're allowed to work with */
2320 list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2322 ops = oap->oap_caller_ops;
2324 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2325 "magic 0x%x\n", oap, oap->oap_magic);
2328 /* pin object in memory, so that completion call-backs
2329 * can be safely called under client_obd_list lock. */
2330 clob = osc_oap2cl_page(oap)->cp_obj;
2331 cl_object_get(clob);
2334 if (page_count != 0 &&
2335 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2336 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2337 " oap %p, page %p, srvlock %u\n",
2338 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2341 /* in llite being 'ready' equates to the page being locked
2342 * until completion unlocks it. commit_write submits a page
2343 * as not ready because its unlock will happen unconditionally
2344 * as the call returns. if we race with commit_write giving
2345 * us that page we dont' want to create a hole in the page
2346 * stream, so we stop and leave the rpc to be fired by
2347 * another dirtier or kupdated interval (the not ready page
2348 * will still be on the dirty list). we could call in
2349 * at the end of ll_file_write to process the queue again. */
2350 if (!(oap->oap_async_flags & ASYNC_READY)) {
2351 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2354 CDEBUG(D_INODE, "oap %p page %p returned %d "
2355 "instead of ready\n", oap,
2359 /* llite is telling us that the page is still
2360 * in commit_write and that we should try
2361 * and put it in an rpc again later. we
2362 * break out of the loop so we don't create
2363 * a hole in the sequence of pages in the rpc
2368 /* the io isn't needed.. tell the checks
2369 * below to complete the rpc with EINTR */
2370 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2371 oap->oap_count = -EINTR;
2374 oap->oap_async_flags |= ASYNC_READY;
2377 LASSERTF(0, "oap %p page %p returned %d "
2378 "from make_ready\n", oap,
2386 * Page submitted for IO has to be locked. Either by
2387 * ->ap_make_ready() or by higher layers.
2389 #if defined(__KERNEL__) && defined(__linux__)
2391 struct cl_page *page;
2393 page = osc_oap2cl_page(oap);
2395 if (page->cp_type == CPT_CACHEABLE &&
2396 !(PageLocked(oap->oap_page) &&
2397 (CheckWriteback(oap->oap_page, cmd)))) {
2398 CDEBUG(D_PAGE, "page %p lost wb %lx/%x\n",
2400 (long)oap->oap_page->flags,
2401 oap->oap_async_flags);
2406 /* If there is a gap at the start of this page, it can't merge
2407 * with any previous page, so we'll hand the network a
2408 * "fragmented" page array that it can't transfer in 1 RDMA */
2409 if (page_count != 0 && oap->oap_page_off != 0)
2412 /* take the page out of our book-keeping */
2413 list_del_init(&oap->oap_pending_item);
2414 lop_update_pending(cli, lop, cmd, -1);
2415 list_del_init(&oap->oap_urgent_item);
2417 if (page_count == 0)
2418 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2419 (PTLRPC_MAX_BRW_SIZE - 1);
2421 /* ask the caller for the size of the io as the rpc leaves. */
2422 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2424 ops->ap_refresh_count(env, oap->oap_caller_data,
2426 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2428 if (oap->oap_count <= 0) {
2429 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2431 osc_ap_completion(env, cli, NULL,
2432 oap, 0, oap->oap_count);
2436 /* now put the page back in our accounting */
2437 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2438 if (page_count == 0)
2439 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2440 if (++page_count >= cli->cl_max_pages_per_rpc)
2443 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2444 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2445 * have the same alignment as the initial writes that allocated
2446 * extents on the server. */
2447 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2448 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2449 if (ending_offset == 0)
2452 /* If there is a gap at the end of this page, it can't merge
2453 * with any subsequent pages, so we'll hand the network a
2454 * "fragmented" page array that it can't transfer in 1 RDMA */
2455 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2459 osc_wake_cache_waiters(cli);
2461 loi_list_maint(cli, loi);
2463 client_obd_list_unlock(&cli->cl_loi_list_lock);
2466 cl_object_put(env, clob);
2468 if (page_count == 0) {
2469 client_obd_list_lock(&cli->cl_loi_list_lock);
2473 req = osc_build_req(env, cli, &rpc_list, page_count, cmd);
2475 LASSERT(list_empty(&rpc_list));
2476 loi_list_maint(cli, loi);
2477 RETURN(PTR_ERR(req));
2480 aa = ptlrpc_req_async_args(req);
2482 if (cmd == OBD_BRW_READ) {
2483 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2484 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2485 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2486 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2488 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2489 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2490 cli->cl_w_in_flight);
2491 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2492 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2494 ptlrpc_lprocfs_brw(req, aa->aa_requested_nob);
2496 client_obd_list_lock(&cli->cl_loi_list_lock);
2498 if (cmd == OBD_BRW_READ)
2499 cli->cl_r_in_flight++;
2501 cli->cl_w_in_flight++;
2503 /* queued sync pages can be torn down while the pages
2504 * were between the pending list and the rpc */
2506 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2507 /* only one oap gets a request reference */
2510 if (oap->oap_interrupted && !req->rq_intr) {
2511 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2513 ptlrpc_mark_interrupted(req);
2517 tmp->oap_request = ptlrpc_request_addref(req);
2519 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2520 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2522 req->rq_interpret_reply = brw_interpret;
2523 ptlrpcd_add_req(req, PSCOPE_BRW);
2527 #define LOI_DEBUG(LOI, STR, args...) \
2528 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2529 !list_empty(&(LOI)->loi_ready_item) || \
2530 !list_empty(&(LOI)->loi_hp_ready_item), \
2531 (LOI)->loi_write_lop.lop_num_pending, \
2532 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2533 (LOI)->loi_read_lop.lop_num_pending, \
2534 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2537 /* This is called by osc_check_rpcs() to find which objects have pages that
2538 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2539 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2543 /* First return objects that have blocked locks so that they
2544 * will be flushed quickly and other clients can get the lock,
2545 * then objects which have pages ready to be stuffed into RPCs */
2546 if (!list_empty(&cli->cl_loi_hp_ready_list))
2547 RETURN(list_entry(cli->cl_loi_hp_ready_list.next,
2548 struct lov_oinfo, loi_hp_ready_item));
2549 if (!list_empty(&cli->cl_loi_ready_list))
2550 RETURN(list_entry(cli->cl_loi_ready_list.next,
2551 struct lov_oinfo, loi_ready_item));
2553 /* then if we have cache waiters, return all objects with queued
2554 * writes. This is especially important when many small files
2555 * have filled up the cache and not been fired into rpcs because
2556 * they don't pass the nr_pending/object threshhold */
2557 if (!list_empty(&cli->cl_cache_waiters) &&
2558 !list_empty(&cli->cl_loi_write_list))
2559 RETURN(list_entry(cli->cl_loi_write_list.next,
2560 struct lov_oinfo, loi_write_item));
2562 /* then return all queued objects when we have an invalid import
2563 * so that they get flushed */
2564 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2565 if (!list_empty(&cli->cl_loi_write_list))
2566 RETURN(list_entry(cli->cl_loi_write_list.next,
2567 struct lov_oinfo, loi_write_item));
2568 if (!list_empty(&cli->cl_loi_read_list))
2569 RETURN(list_entry(cli->cl_loi_read_list.next,
2570 struct lov_oinfo, loi_read_item));
2575 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2577 struct osc_async_page *oap;
2580 if (!list_empty(&loi->loi_write_lop.lop_urgent)) {
2581 oap = list_entry(loi->loi_write_lop.lop_urgent.next,
2582 struct osc_async_page, oap_urgent_item);
2583 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2586 if (!hprpc && !list_empty(&loi->loi_read_lop.lop_urgent)) {
2587 oap = list_entry(loi->loi_write_lop.lop_urgent.next,
2588 struct osc_async_page, oap_urgent_item);
2589 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2592 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2595 /* called with the loi list lock held */
2596 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2598 struct lov_oinfo *loi;
2599 int rc = 0, race_counter = 0;
2602 while ((loi = osc_next_loi(cli)) != NULL) {
2603 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2605 if (osc_max_rpc_in_flight(cli, loi))
2608 /* attempt some read/write balancing by alternating between
2609 * reads and writes in an object. The makes_rpc checks here
2610 * would be redundant if we were getting read/write work items
2611 * instead of objects. we don't want send_oap_rpc to drain a
2612 * partial read pending queue when we're given this object to
2613 * do io on writes while there are cache waiters */
2614 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2615 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2616 &loi->loi_write_lop);
2624 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2625 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2626 &loi->loi_read_lop);
2635 /* attempt some inter-object balancing by issueing rpcs
2636 * for each object in turn */
2637 if (!list_empty(&loi->loi_hp_ready_item))
2638 list_del_init(&loi->loi_hp_ready_item);
2639 if (!list_empty(&loi->loi_ready_item))
2640 list_del_init(&loi->loi_ready_item);
2641 if (!list_empty(&loi->loi_write_item))
2642 list_del_init(&loi->loi_write_item);
2643 if (!list_empty(&loi->loi_read_item))
2644 list_del_init(&loi->loi_read_item);
2646 loi_list_maint(cli, loi);
2648 /* send_oap_rpc fails with 0 when make_ready tells it to
2649 * back off. llite's make_ready does this when it tries
2650 * to lock a page queued for write that is already locked.
2651 * we want to try sending rpcs from many objects, but we
2652 * don't want to spin failing with 0. */
2653 if (race_counter == 10)
2659 /* we're trying to queue a page in the osc so we're subject to the
2660 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2661 * If the osc's queued pages are already at that limit, then we want to sleep
2662 * until there is space in the osc's queue for us. We also may be waiting for
2663 * write credits from the OST if there are RPCs in flight that may return some
2664 * before we fall back to sync writes.
2666 * We need this know our allocation was granted in the presence of signals */
2667 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2671 client_obd_list_lock(&cli->cl_loi_list_lock);
2672 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2673 client_obd_list_unlock(&cli->cl_loi_list_lock);
2678 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2681 int osc_enter_cache_try(const struct lu_env *env,
2682 struct client_obd *cli, struct lov_oinfo *loi,
2683 struct osc_async_page *oap, int transient)
2687 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2689 osc_consume_write_grant(cli, &oap->oap_brw_page);
2691 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2692 atomic_inc(&obd_dirty_transit_pages);
2693 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2699 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2700 * grant or cache space. */
2701 static int osc_enter_cache(const struct lu_env *env,
2702 struct client_obd *cli, struct lov_oinfo *loi,
2703 struct osc_async_page *oap)
2705 struct osc_cache_waiter ocw;
2706 struct l_wait_info lwi = { 0 };
2710 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2711 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2712 cli->cl_dirty_max, obd_max_dirty_pages,
2713 cli->cl_lost_grant, cli->cl_avail_grant);
2715 /* force the caller to try sync io. this can jump the list
2716 * of queued writes and create a discontiguous rpc stream */
2717 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2718 loi->loi_ar.ar_force_sync)
2721 /* Hopefully normal case - cache space and write credits available */
2722 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2723 atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2724 osc_enter_cache_try(env, cli, loi, oap, 0))
2727 /* Make sure that there are write rpcs in flight to wait for. This
2728 * is a little silly as this object may not have any pending but
2729 * other objects sure might. */
2730 if (cli->cl_w_in_flight) {
2731 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2732 cfs_waitq_init(&ocw.ocw_waitq);
2736 loi_list_maint(cli, loi);
2737 osc_check_rpcs(env, cli);
2738 client_obd_list_unlock(&cli->cl_loi_list_lock);
2740 CDEBUG(D_CACHE, "sleeping for cache space\n");
2741 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2743 client_obd_list_lock(&cli->cl_loi_list_lock);
2744 if (!list_empty(&ocw.ocw_entry)) {
2745 list_del(&ocw.ocw_entry);
2755 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2756 struct lov_oinfo *loi, cfs_page_t *page,
2757 obd_off offset, const struct obd_async_page_ops *ops,
2758 void *data, void **res, int nocache,
2759 struct lustre_handle *lockh)
2761 struct osc_async_page *oap;
2766 return size_round(sizeof(*oap));
2769 oap->oap_magic = OAP_MAGIC;
2770 oap->oap_cli = &exp->exp_obd->u.cli;
2773 oap->oap_caller_ops = ops;
2774 oap->oap_caller_data = data;
2776 oap->oap_page = page;
2777 oap->oap_obj_off = offset;
2778 if (!client_is_remote(exp) &&
2779 cfs_capable(CFS_CAP_SYS_RESOURCE))
2780 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2782 LASSERT(!(offset & ~CFS_PAGE_MASK));
2784 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2785 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2786 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2787 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2789 spin_lock_init(&oap->oap_lock);
2790 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2794 struct osc_async_page *oap_from_cookie(void *cookie)
2796 struct osc_async_page *oap = cookie;
2797 if (oap->oap_magic != OAP_MAGIC)
2798 return ERR_PTR(-EINVAL);
2802 int osc_queue_async_io(const struct lu_env *env,
2803 struct obd_export *exp, struct lov_stripe_md *lsm,
2804 struct lov_oinfo *loi, void *cookie,
2805 int cmd, obd_off off, int count,
2806 obd_flag brw_flags, enum async_flags async_flags)
2808 struct client_obd *cli = &exp->exp_obd->u.cli;
2809 struct osc_async_page *oap;
2813 oap = oap_from_cookie(cookie);
2815 RETURN(PTR_ERR(oap));
2817 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2820 if (!list_empty(&oap->oap_pending_item) ||
2821 !list_empty(&oap->oap_urgent_item) ||
2822 !list_empty(&oap->oap_rpc_item))
2825 /* check if the file's owner/group is over quota */
2826 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
2827 struct cl_object *obj;
2828 struct cl_attr attr; /* XXX put attr into thread info */
2830 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
2832 cl_object_attr_lock(obj);
2833 rc = cl_object_attr_get(env, obj, &attr);
2834 cl_object_attr_unlock(obj);
2836 if (rc == 0 && lquota_chkdq(quota_interface, cli, attr.cat_uid,
2837 attr.cat_gid) == NO_QUOTA)
2844 loi = lsm->lsm_oinfo[0];
2846 client_obd_list_lock(&cli->cl_loi_list_lock);
2848 LASSERT(off + count <= CFS_PAGE_SIZE);
2850 oap->oap_page_off = off;
2851 oap->oap_count = count;
2852 oap->oap_brw_flags = brw_flags;
2853 oap->oap_async_flags = async_flags;
2855 if (cmd & OBD_BRW_WRITE) {
2856 rc = osc_enter_cache(env, cli, loi, oap);
2858 client_obd_list_unlock(&cli->cl_loi_list_lock);
2863 osc_oap_to_pending(oap);
2864 loi_list_maint(cli, loi);
2866 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2869 osc_check_rpcs(env, cli);
2870 client_obd_list_unlock(&cli->cl_loi_list_lock);
2875 /* aka (~was & now & flag), but this is more clear :) */
2876 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2878 int osc_set_async_flags_base(struct client_obd *cli,
2879 struct lov_oinfo *loi, struct osc_async_page *oap,
2880 obd_flag async_flags)
2882 struct loi_oap_pages *lop;
2885 LASSERT(!list_empty(&oap->oap_pending_item));
2887 if (oap->oap_cmd & OBD_BRW_WRITE) {
2888 lop = &loi->loi_write_lop;
2890 lop = &loi->loi_read_lop;
2893 if ((oap->oap_async_flags & async_flags) == async_flags)
2896 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2897 oap->oap_async_flags |= ASYNC_READY;
2899 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
2900 list_empty(&oap->oap_rpc_item)) {
2901 if (oap->oap_async_flags & ASYNC_HP)
2902 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2904 list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2905 oap->oap_async_flags |= ASYNC_URGENT;
2906 loi_list_maint(cli, loi);
2909 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2910 oap->oap_async_flags);
2914 int osc_teardown_async_page(struct obd_export *exp,
2915 struct lov_stripe_md *lsm,
2916 struct lov_oinfo *loi, void *cookie)
2918 struct client_obd *cli = &exp->exp_obd->u.cli;
2919 struct loi_oap_pages *lop;
2920 struct osc_async_page *oap;
2924 oap = oap_from_cookie(cookie);
2926 RETURN(PTR_ERR(oap));
2929 loi = lsm->lsm_oinfo[0];
2931 if (oap->oap_cmd & OBD_BRW_WRITE) {
2932 lop = &loi->loi_write_lop;
2934 lop = &loi->loi_read_lop;
2937 client_obd_list_lock(&cli->cl_loi_list_lock);
2939 if (!list_empty(&oap->oap_rpc_item))
2940 GOTO(out, rc = -EBUSY);
2942 osc_exit_cache(cli, oap, 0);
2943 osc_wake_cache_waiters(cli);
2945 if (!list_empty(&oap->oap_urgent_item)) {
2946 list_del_init(&oap->oap_urgent_item);
2947 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
2949 if (!list_empty(&oap->oap_pending_item)) {
2950 list_del_init(&oap->oap_pending_item);
2951 lop_update_pending(cli, lop, oap->oap_cmd, -1);
2953 loi_list_maint(cli, loi);
2954 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
2956 client_obd_list_unlock(&cli->cl_loi_list_lock);
2960 static void osc_set_lock_data_with_check(struct ldlm_lock *lock,
2961 struct ldlm_enqueue_info *einfo,
2964 void *data = einfo->ei_cbdata;
2966 LASSERT(lock != NULL);
2967 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
2968 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
2969 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
2970 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
2972 lock_res_and_lock(lock);
2973 spin_lock(&osc_ast_guard);
2974 LASSERT(lock->l_ast_data == NULL || lock->l_ast_data == data);
2975 lock->l_ast_data = data;
2976 spin_unlock(&osc_ast_guard);
2977 unlock_res_and_lock(lock);
2980 static void osc_set_data_with_check(struct lustre_handle *lockh,
2981 struct ldlm_enqueue_info *einfo,
2984 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2987 osc_set_lock_data_with_check(lock, einfo, flags);
2988 LDLM_LOCK_PUT(lock);
2990 CERROR("lockh %p, data %p - client evicted?\n",
2991 lockh, einfo->ei_cbdata);
2994 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2995 ldlm_iterator_t replace, void *data)
2997 struct ldlm_res_id res_id;
2998 struct obd_device *obd = class_exp2obd(exp);
3000 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_gr, &res_id);
3001 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3005 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3006 obd_enqueue_update_f upcall, void *cookie,
3009 int intent = *flags & LDLM_FL_HAS_INTENT;
3013 /* The request was created before ldlm_cli_enqueue call. */
3014 if (rc == ELDLM_LOCK_ABORTED) {
3015 struct ldlm_reply *rep;
3016 rep = req_capsule_server_get(&req->rq_pill,
3019 LASSERT(rep != NULL);
3020 if (rep->lock_policy_res1)
3021 rc = rep->lock_policy_res1;
3025 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3026 *flags |= LDLM_FL_LVB_READY;
3027 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3028 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3031 /* Call the update callback. */
3032 rc = (*upcall)(cookie, rc);
3036 static int osc_enqueue_interpret(const struct lu_env *env,
3037 struct ptlrpc_request *req,
3038 struct osc_enqueue_args *aa, int rc)
3040 struct ldlm_lock *lock;
3041 struct lustre_handle handle;
3044 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3045 * might be freed anytime after lock upcall has been called. */
3046 lustre_handle_copy(&handle, aa->oa_lockh);
3047 mode = aa->oa_ei->ei_mode;
3049 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3051 lock = ldlm_handle2lock(&handle);
3053 /* Take an additional reference so that a blocking AST that
3054 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3055 * to arrive after an upcall has been executed by
3056 * osc_enqueue_fini(). */
3057 ldlm_lock_addref(&handle, mode);
3059 /* Complete obtaining the lock procedure. */
3060 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3061 mode, aa->oa_flags, aa->oa_lvb,
3062 sizeof(*aa->oa_lvb), lustre_swab_ost_lvb,
3064 /* Complete osc stuff. */
3065 rc = osc_enqueue_fini(req, aa->oa_lvb,
3066 aa->oa_upcall, aa->oa_cookie, aa->oa_flags, rc);
3068 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3070 /* Release the lock for async request. */
3071 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3073 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3074 * not already released by
3075 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3077 ldlm_lock_decref(&handle, mode);
3079 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3080 aa->oa_lockh, req, aa);
3081 ldlm_lock_decref(&handle, mode);
3082 LDLM_LOCK_PUT(lock);
3086 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3087 struct lov_oinfo *loi, int flags,
3088 struct ost_lvb *lvb, __u32 mode, int rc)
3090 if (rc == ELDLM_OK) {
3091 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3094 LASSERT(lock != NULL);
3095 loi->loi_lvb = *lvb;
3096 tmp = loi->loi_lvb.lvb_size;
3097 /* Extend KMS up to the end of this lock and no further
3098 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3099 if (tmp > lock->l_policy_data.l_extent.end)
3100 tmp = lock->l_policy_data.l_extent.end + 1;
3101 if (tmp >= loi->loi_kms) {
3102 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3103 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3104 loi_kms_set(loi, tmp);
3106 LDLM_DEBUG(lock, "lock acquired, setting rss="
3107 LPU64"; leaving kms="LPU64", end="LPU64,
3108 loi->loi_lvb.lvb_size, loi->loi_kms,
3109 lock->l_policy_data.l_extent.end);
3111 ldlm_lock_allow_match(lock);
3112 LDLM_LOCK_PUT(lock);
3113 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3114 loi->loi_lvb = *lvb;
3115 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3116 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3120 EXPORT_SYMBOL(osc_update_enqueue);
3122 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3124 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3125 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3126 * other synchronous requests, however keeping some locks and trying to obtain
3127 * others may take a considerable amount of time in a case of ost failure; and
3128 * when other sync requests do not get released lock from a client, the client
3129 * is excluded from the cluster -- such scenarious make the life difficult, so
3130 * release locks just after they are obtained. */
3131 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3132 int *flags, ldlm_policy_data_t *policy,
3133 struct ost_lvb *lvb, int kms_valid,
3134 obd_enqueue_update_f upcall, void *cookie,
3135 struct ldlm_enqueue_info *einfo,
3136 struct lustre_handle *lockh,
3137 struct ptlrpc_request_set *rqset, int async)
3139 struct obd_device *obd = exp->exp_obd;
3140 struct ptlrpc_request *req = NULL;
3141 int intent = *flags & LDLM_FL_HAS_INTENT;
3146 /* Filesystem lock extents are extended to page boundaries so that
3147 * dealing with the page cache is a little smoother. */
3148 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3149 policy->l_extent.end |= ~CFS_PAGE_MASK;
3152 * kms is not valid when either object is completely fresh (so that no
3153 * locks are cached), or object was evicted. In the latter case cached
3154 * lock cannot be used, because it would prime inode state with
3155 * potentially stale LVB.
3160 /* Next, search for already existing extent locks that will cover us */
3161 /* If we're trying to read, we also search for an existing PW lock. The
3162 * VFS and page cache already protect us locally, so lots of readers/
3163 * writers can share a single PW lock.
3165 * There are problems with conversion deadlocks, so instead of
3166 * converting a read lock to a write lock, we'll just enqueue a new
3169 * At some point we should cancel the read lock instead of making them
3170 * send us a blocking callback, but there are problems with canceling
3171 * locks out from other users right now, too. */
3172 mode = einfo->ei_mode;
3173 if (einfo->ei_mode == LCK_PR)
3175 mode = ldlm_lock_match(obd->obd_namespace,
3176 *flags | LDLM_FL_LVB_READY, res_id,
3177 einfo->ei_type, policy, mode, lockh, 0);
3179 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3181 if (matched->l_ast_data == NULL ||
3182 matched->l_ast_data == einfo->ei_cbdata) {
3183 /* addref the lock only if not async requests and PW
3184 * lock is matched whereas we asked for PR. */
3185 if (!rqset && einfo->ei_mode != mode)
3186 ldlm_lock_addref(lockh, LCK_PR);
3187 osc_set_lock_data_with_check(matched, einfo, *flags);
3189 /* I would like to be able to ASSERT here that
3190 * rss <= kms, but I can't, for reasons which
3191 * are explained in lov_enqueue() */
3194 /* We already have a lock, and it's referenced */
3195 (*upcall)(cookie, ELDLM_OK);
3197 /* For async requests, decref the lock. */
3198 if (einfo->ei_mode != mode)
3199 ldlm_lock_decref(lockh, LCK_PW);
3201 ldlm_lock_decref(lockh, einfo->ei_mode);
3202 LDLM_LOCK_PUT(matched);
3205 ldlm_lock_decref(lockh, mode);
3206 LDLM_LOCK_PUT(matched);
3211 CFS_LIST_HEAD(cancels);
3212 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3213 &RQF_LDLM_ENQUEUE_LVB);
3217 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3221 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3223 ptlrpc_request_set_replen(req);
3226 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3227 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3229 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3230 sizeof(*lvb), lustre_swab_ost_lvb, lockh, async);
3233 struct osc_enqueue_args *aa;
3234 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3235 aa = ptlrpc_req_async_args(req);
3238 aa->oa_flags = flags;
3239 aa->oa_upcall = upcall;
3240 aa->oa_cookie = cookie;
3242 aa->oa_lockh = lockh;
3244 req->rq_interpret_reply =
3245 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3246 if (rqset == PTLRPCD_SET)
3247 ptlrpcd_add_req(req, PSCOPE_OTHER);
3249 ptlrpc_set_add_req(rqset, req);
3250 } else if (intent) {
3251 ptlrpc_req_finished(req);
3256 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, rc);
3258 ptlrpc_req_finished(req);
3263 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3264 struct ldlm_enqueue_info *einfo,
3265 struct ptlrpc_request_set *rqset)
3267 struct ldlm_res_id res_id;
3271 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3272 oinfo->oi_md->lsm_object_gr, &res_id);
3274 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3275 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3276 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3277 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3278 rqset, rqset != NULL);
3282 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3283 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3284 int *flags, void *data, struct lustre_handle *lockh,
3287 struct obd_device *obd = exp->exp_obd;
3288 int lflags = *flags;
3292 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3295 /* Filesystem lock extents are extended to page boundaries so that
3296 * dealing with the page cache is a little smoother */
3297 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3298 policy->l_extent.end |= ~CFS_PAGE_MASK;
3300 /* Next, search for already existing extent locks that will cover us */
3301 /* If we're trying to read, we also search for an existing PW lock. The
3302 * VFS and page cache already protect us locally, so lots of readers/
3303 * writers can share a single PW lock. */
3307 rc = ldlm_lock_match(obd->obd_namespace, lflags | LDLM_FL_LVB_READY,
3308 res_id, type, policy, rc, lockh, unref);
3311 osc_set_data_with_check(lockh, data, lflags);
3312 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3313 ldlm_lock_addref(lockh, LCK_PR);
3314 ldlm_lock_decref(lockh, LCK_PW);
3321 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3325 if (unlikely(mode == LCK_GROUP))
3326 ldlm_lock_decref_and_cancel(lockh, mode);
3328 ldlm_lock_decref(lockh, mode);
3333 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3334 __u32 mode, struct lustre_handle *lockh)
3337 RETURN(osc_cancel_base(lockh, mode));
3340 static int osc_cancel_unused(struct obd_export *exp,
3341 struct lov_stripe_md *lsm, int flags,
3344 struct obd_device *obd = class_exp2obd(exp);
3345 struct ldlm_res_id res_id, *resp = NULL;
3348 resp = osc_build_res_name(lsm->lsm_object_id,
3349 lsm->lsm_object_gr, &res_id);
3352 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3355 static int osc_statfs_interpret(const struct lu_env *env,
3356 struct ptlrpc_request *req,
3357 struct osc_async_args *aa, int rc)
3359 struct obd_statfs *msfs;
3362 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3363 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3369 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3371 GOTO(out, rc = -EPROTO);
3374 *aa->aa_oi->oi_osfs = *msfs;
3376 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3380 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3381 __u64 max_age, struct ptlrpc_request_set *rqset)
3383 struct ptlrpc_request *req;
3384 struct osc_async_args *aa;
3388 /* We could possibly pass max_age in the request (as an absolute
3389 * timestamp or a "seconds.usec ago") so the target can avoid doing
3390 * extra calls into the filesystem if that isn't necessary (e.g.
3391 * during mount that would help a bit). Having relative timestamps
3392 * is not so great if request processing is slow, while absolute
3393 * timestamps are not ideal because they need time synchronization. */
3394 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3398 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3400 ptlrpc_request_free(req);
3403 ptlrpc_request_set_replen(req);
3404 req->rq_request_portal = OST_CREATE_PORTAL;
3405 ptlrpc_at_set_req_timeout(req);
3407 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3408 /* procfs requests not want stat in wait for avoid deadlock */
3409 req->rq_no_resend = 1;
3410 req->rq_no_delay = 1;
3413 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3414 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3415 aa = ptlrpc_req_async_args(req);
3418 ptlrpc_set_add_req(rqset, req);
3422 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3423 __u64 max_age, __u32 flags)
3425 struct obd_statfs *msfs;
3426 struct ptlrpc_request *req;
3427 struct obd_import *imp = NULL;
3431 /*Since the request might also come from lprocfs, so we need
3432 *sync this with client_disconnect_export Bug15684*/
3433 down_read(&obd->u.cli.cl_sem);
3434 if (obd->u.cli.cl_import)
3435 imp = class_import_get(obd->u.cli.cl_import);
3436 up_read(&obd->u.cli.cl_sem);
3440 /* We could possibly pass max_age in the request (as an absolute
3441 * timestamp or a "seconds.usec ago") so the target can avoid doing
3442 * extra calls into the filesystem if that isn't necessary (e.g.
3443 * during mount that would help a bit). Having relative timestamps
3444 * is not so great if request processing is slow, while absolute
3445 * timestamps are not ideal because they need time synchronization. */
3446 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3448 class_import_put(imp);
3453 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3455 ptlrpc_request_free(req);
3458 ptlrpc_request_set_replen(req);
3459 req->rq_request_portal = OST_CREATE_PORTAL;
3460 ptlrpc_at_set_req_timeout(req);
3462 if (flags & OBD_STATFS_NODELAY) {
3463 /* procfs requests not want stat in wait for avoid deadlock */
3464 req->rq_no_resend = 1;
3465 req->rq_no_delay = 1;
3468 rc = ptlrpc_queue_wait(req);
3472 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3474 GOTO(out, rc = -EPROTO);
3481 ptlrpc_req_finished(req);
3485 /* Retrieve object striping information.
3487 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3488 * the maximum number of OST indices which will fit in the user buffer.
3489 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3491 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3493 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3494 struct lov_user_md_v3 lum, *lumk;
3495 struct lov_user_ost_data_v1 *lmm_objects;
3496 int rc = 0, lum_size;
3502 /* we only need the header part from user space to get lmm_magic and
3503 * lmm_stripe_count, (the header part is common to v1 and v3) */
3504 lum_size = sizeof(struct lov_user_md_v1);
3505 if (copy_from_user(&lum, lump, lum_size))
3508 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3509 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3512 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3513 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3514 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3515 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3517 /* we can use lov_mds_md_size() to compute lum_size
3518 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3519 if (lum.lmm_stripe_count > 0) {
3520 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3521 OBD_ALLOC(lumk, lum_size);
3525 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3526 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3528 lmm_objects = &(lumk->lmm_objects[0]);
3529 lmm_objects->l_object_id = lsm->lsm_object_id;
3531 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3535 lumk->lmm_object_id = lsm->lsm_object_id;
3536 lumk->lmm_object_gr = lsm->lsm_object_gr;
3537 lumk->lmm_stripe_count = 1;
3539 if (copy_to_user(lump, lumk, lum_size))
3543 OBD_FREE(lumk, lum_size);
3549 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3550 void *karg, void *uarg)
3552 struct obd_device *obd = exp->exp_obd;
3553 struct obd_ioctl_data *data = karg;
3557 if (!try_module_get(THIS_MODULE)) {
3558 CERROR("Can't get module. Is it alive?");
3562 case OBD_IOC_LOV_GET_CONFIG: {
3564 struct lov_desc *desc;
3565 struct obd_uuid uuid;
3569 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3570 GOTO(out, err = -EINVAL);
3572 data = (struct obd_ioctl_data *)buf;
3574 if (sizeof(*desc) > data->ioc_inllen1) {
3575 obd_ioctl_freedata(buf, len);
3576 GOTO(out, err = -EINVAL);
3579 if (data->ioc_inllen2 < sizeof(uuid)) {
3580 obd_ioctl_freedata(buf, len);
3581 GOTO(out, err = -EINVAL);
3584 desc = (struct lov_desc *)data->ioc_inlbuf1;
3585 desc->ld_tgt_count = 1;
3586 desc->ld_active_tgt_count = 1;
3587 desc->ld_default_stripe_count = 1;
3588 desc->ld_default_stripe_size = 0;
3589 desc->ld_default_stripe_offset = 0;
3590 desc->ld_pattern = 0;
3591 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3593 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3595 err = copy_to_user((void *)uarg, buf, len);
3598 obd_ioctl_freedata(buf, len);
3601 case LL_IOC_LOV_SETSTRIPE:
3602 err = obd_alloc_memmd(exp, karg);
3606 case LL_IOC_LOV_GETSTRIPE:
3607 err = osc_getstripe(karg, uarg);
3609 case OBD_IOC_CLIENT_RECOVER:
3610 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3615 case IOC_OSC_SET_ACTIVE:
3616 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3619 case OBD_IOC_POLL_QUOTACHECK:
3620 err = lquota_poll_check(quota_interface, exp,
3621 (struct if_quotacheck *)karg);
3623 case OBD_IOC_PING_TARGET:
3624 err = ptlrpc_obd_ping(obd);
3627 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3628 cmd, cfs_curproc_comm());
3629 GOTO(out, err = -ENOTTY);
3632 module_put(THIS_MODULE);
3636 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3637 void *key, __u32 *vallen, void *val,
3638 struct lov_stripe_md *lsm)
3641 if (!vallen || !val)
3644 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3645 __u32 *stripe = val;
3646 *vallen = sizeof(*stripe);
3649 } else if (KEY_IS(KEY_LAST_ID)) {
3650 struct ptlrpc_request *req;
3655 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3656 &RQF_OST_GET_INFO_LAST_ID);
3660 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3661 RCL_CLIENT, keylen);
3662 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3664 ptlrpc_request_free(req);
3668 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3669 memcpy(tmp, key, keylen);
3671 req->rq_no_delay = req->rq_no_resend = 1;
3672 ptlrpc_request_set_replen(req);
3673 rc = ptlrpc_queue_wait(req);
3677 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3679 GOTO(out, rc = -EPROTO);
3681 *((obd_id *)val) = *reply;
3683 ptlrpc_req_finished(req);
3685 } else if (KEY_IS(KEY_FIEMAP)) {
3686 struct ptlrpc_request *req;
3687 struct ll_user_fiemap *reply;
3691 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3692 &RQF_OST_GET_INFO_FIEMAP);
3696 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3697 RCL_CLIENT, keylen);
3698 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3699 RCL_CLIENT, *vallen);
3700 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3701 RCL_SERVER, *vallen);
3703 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3705 ptlrpc_request_free(req);
3709 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3710 memcpy(tmp, key, keylen);
3711 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3712 memcpy(tmp, val, *vallen);
3714 ptlrpc_request_set_replen(req);
3715 rc = ptlrpc_queue_wait(req);
3719 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3721 GOTO(out1, rc = -EPROTO);
3723 memcpy(val, reply, *vallen);
3725 ptlrpc_req_finished(req);
3733 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
3735 struct llog_ctxt *ctxt;
3739 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3741 rc = llog_initiator_connect(ctxt);
3742 llog_ctxt_put(ctxt);
3744 /* XXX return an error? skip setting below flags? */
3747 spin_lock(&imp->imp_lock);
3748 imp->imp_server_timeout = 1;
3749 imp->imp_pingable = 1;
3750 spin_unlock(&imp->imp_lock);
3751 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3756 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
3757 struct ptlrpc_request *req,
3764 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
3767 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3768 void *key, obd_count vallen, void *val,
3769 struct ptlrpc_request_set *set)
3771 struct ptlrpc_request *req;
3772 struct obd_device *obd = exp->exp_obd;
3773 struct obd_import *imp = class_exp2cliimp(exp);
3778 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3780 if (KEY_IS(KEY_NEXT_ID)) {
3781 if (vallen != sizeof(obd_id))
3785 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3786 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3787 exp->exp_obd->obd_name,
3788 obd->u.cli.cl_oscc.oscc_next_id);
3793 if (KEY_IS(KEY_UNLINKED)) {
3794 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3795 spin_lock(&oscc->oscc_lock);
3796 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3797 spin_unlock(&oscc->oscc_lock);
3801 if (KEY_IS(KEY_INIT_RECOV)) {
3802 if (vallen != sizeof(int))
3804 spin_lock(&imp->imp_lock);
3805 imp->imp_initial_recov = *(int *)val;
3806 spin_unlock(&imp->imp_lock);
3807 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3808 exp->exp_obd->obd_name,
3809 imp->imp_initial_recov);
3813 if (KEY_IS(KEY_CHECKSUM)) {
3814 if (vallen != sizeof(int))
3816 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3820 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3821 sptlrpc_conf_client_adapt(obd);
3825 if (KEY_IS(KEY_FLUSH_CTX)) {
3826 sptlrpc_import_flush_my_ctx(imp);
3830 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3833 /* We pass all other commands directly to OST. Since nobody calls osc
3834 methods directly and everybody is supposed to go through LOV, we
3835 assume lov checked invalid values for us.
3836 The only recognised values so far are evict_by_nid and mds_conn.
3837 Even if something bad goes through, we'd get a -EINVAL from OST
3840 if (KEY_IS(KEY_GRANT_SHRINK))
3841 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
3843 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_INFO);
3848 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3849 RCL_CLIENT, keylen);
3850 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3851 RCL_CLIENT, vallen);
3852 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3854 ptlrpc_request_free(req);
3858 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3859 memcpy(tmp, key, keylen);
3860 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
3861 memcpy(tmp, val, vallen);
3863 if (KEY_IS(KEY_MDS_CONN)) {
3864 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3866 oscc->oscc_oa.o_gr = (*(__u32 *)val);
3867 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
3868 LASSERT_MDS_GROUP(oscc->oscc_oa.o_gr);
3869 req->rq_no_delay = req->rq_no_resend = 1;
3870 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3871 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
3872 struct osc_grant_args *aa;
3875 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
3876 aa = ptlrpc_req_async_args(req);
3879 ptlrpc_req_finished(req);
3882 *oa = ((struct ost_body *)val)->oa;
3884 req->rq_interpret_reply = osc_shrink_grant_interpret;
3887 ptlrpc_request_set_replen(req);
3888 if (!KEY_IS(KEY_GRANT_SHRINK)) {
3889 LASSERT(set != NULL);
3890 ptlrpc_set_add_req(set, req);
3891 ptlrpc_check_set(NULL, set);
3893 ptlrpcd_add_req(req, PSCOPE_OTHER);
3899 static struct llog_operations osc_size_repl_logops = {
3900 lop_cancel: llog_obd_repl_cancel
3903 static struct llog_operations osc_mds_ost_orig_logops;
3904 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
3905 struct obd_device *tgt, int count,
3906 struct llog_catid *catid, struct obd_uuid *uuid)
3911 LASSERT(olg == &obd->obd_olg);
3912 spin_lock(&obd->obd_dev_lock);
3913 if (osc_mds_ost_orig_logops.lop_setup != llog_obd_origin_setup) {
3914 osc_mds_ost_orig_logops = llog_lvfs_ops;
3915 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
3916 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
3917 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
3918 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
3920 spin_unlock(&obd->obd_dev_lock);
3922 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, count,
3923 &catid->lci_logid, &osc_mds_ost_orig_logops);
3925 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
3929 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, count,
3930 NULL, &osc_size_repl_logops);
3932 struct llog_ctxt *ctxt =
3933 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3936 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
3941 CERROR("osc '%s' tgt '%s' cnt %d catid %p rc=%d\n",
3942 obd->obd_name, tgt->obd_name, count, catid, rc);
3943 CERROR("logid "LPX64":0x%x\n",
3944 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
3949 static int osc_llog_finish(struct obd_device *obd, int count)
3951 struct llog_ctxt *ctxt;
3952 int rc = 0, rc2 = 0;
3955 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3957 rc = llog_cleanup(ctxt);
3959 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3961 rc2 = llog_cleanup(ctxt);
3968 static int osc_reconnect(const struct lu_env *env,
3969 struct obd_export *exp, struct obd_device *obd,
3970 struct obd_uuid *cluuid,
3971 struct obd_connect_data *data,
3974 struct client_obd *cli = &obd->u.cli;
3976 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3979 client_obd_list_lock(&cli->cl_loi_list_lock);
3980 data->ocd_grant = cli->cl_avail_grant ?:
3981 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
3982 lost_grant = cli->cl_lost_grant;
3983 cli->cl_lost_grant = 0;
3984 client_obd_list_unlock(&cli->cl_loi_list_lock);
3986 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
3987 "cl_lost_grant: %ld\n", data->ocd_grant,
3988 cli->cl_avail_grant, lost_grant);
3989 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
3990 " ocd_grant: %d\n", data->ocd_connect_flags,
3991 data->ocd_version, data->ocd_grant);
3997 static int osc_disconnect(struct obd_export *exp)
3999 struct obd_device *obd = class_exp2obd(exp);
4000 struct llog_ctxt *ctxt;
4003 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4005 if (obd->u.cli.cl_conn_count == 1) {
4006 /* Flush any remaining cancel messages out to the
4008 llog_sync(ctxt, exp);
4010 llog_ctxt_put(ctxt);
4012 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4016 rc = client_disconnect_export(exp);
4018 * Initially we put del_shrink_grant before disconnect_export, but it
4019 * causes the following problem if setup (connect) and cleanup
4020 * (disconnect) are tangled together.
4021 * connect p1 disconnect p2
4022 * ptlrpc_connect_import
4023 * ............... class_manual_cleanup
4026 * ptlrpc_connect_interrupt
4028 * add this client to shrink list
4030 * Bang! pinger trigger the shrink.
4031 * So the osc should be disconnected from the shrink list, after we
4032 * are sure the import has been destroyed. BUG18662
4034 if (obd->u.cli.cl_import == NULL)
4035 osc_del_shrink_grant(&obd->u.cli);
4039 static int osc_import_event(struct obd_device *obd,
4040 struct obd_import *imp,
4041 enum obd_import_event event)
4043 struct client_obd *cli;
4047 LASSERT(imp->imp_obd == obd);
4050 case IMP_EVENT_DISCON: {
4051 /* Only do this on the MDS OSC's */
4052 if (imp->imp_server_timeout) {
4053 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4055 spin_lock(&oscc->oscc_lock);
4056 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4057 spin_unlock(&oscc->oscc_lock);
4060 client_obd_list_lock(&cli->cl_loi_list_lock);
4061 cli->cl_avail_grant = 0;
4062 cli->cl_lost_grant = 0;
4063 client_obd_list_unlock(&cli->cl_loi_list_lock);
4066 case IMP_EVENT_INACTIVE: {
4067 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4070 case IMP_EVENT_INVALIDATE: {
4071 struct ldlm_namespace *ns = obd->obd_namespace;
4075 env = cl_env_get(&refcheck);
4079 client_obd_list_lock(&cli->cl_loi_list_lock);
4080 /* all pages go to failing rpcs due to the invalid
4082 osc_check_rpcs(env, cli);
4083 client_obd_list_unlock(&cli->cl_loi_list_lock);
4085 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4086 cl_env_put(env, &refcheck);
4091 case IMP_EVENT_ACTIVE: {
4092 /* Only do this on the MDS OSC's */
4093 if (imp->imp_server_timeout) {
4094 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4096 spin_lock(&oscc->oscc_lock);
4097 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
4098 spin_unlock(&oscc->oscc_lock);
4100 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4103 case IMP_EVENT_OCD: {
4104 struct obd_connect_data *ocd = &imp->imp_connect_data;
4106 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4107 osc_init_grant(&obd->u.cli, ocd);
4110 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4111 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4113 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4117 CERROR("Unknown import event %d\n", event);
4123 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4129 rc = ptlrpcd_addref();
4133 rc = client_obd_setup(obd, lcfg);
4137 struct lprocfs_static_vars lvars = { 0 };
4138 struct client_obd *cli = &obd->u.cli;
4140 lprocfs_osc_init_vars(&lvars);
4141 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4142 lproc_osc_attach_seqstat(obd);
4143 sptlrpc_lprocfs_cliobd_attach(obd);
4144 ptlrpc_lprocfs_register_obd(obd);
4148 /* We need to allocate a few requests more, because
4149 brw_interpret tries to create new requests before freeing
4150 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4151 reserved, but I afraid that might be too much wasted RAM
4152 in fact, so 2 is just my guess and still should work. */
4153 cli->cl_import->imp_rq_pool =
4154 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4156 ptlrpc_add_rqs_to_pool);
4158 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4159 sema_init(&cli->cl_grant_sem, 1);
4165 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4171 case OBD_CLEANUP_EARLY: {
4172 struct obd_import *imp;
4173 imp = obd->u.cli.cl_import;
4174 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4175 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4176 ptlrpc_deactivate_import(imp);
4177 spin_lock(&imp->imp_lock);
4178 imp->imp_pingable = 0;
4179 spin_unlock(&imp->imp_lock);
4182 case OBD_CLEANUP_EXPORTS: {
4183 /* If we set up but never connected, the
4184 client import will not have been cleaned. */
4185 if (obd->u.cli.cl_import) {
4186 struct obd_import *imp;
4187 down_write(&obd->u.cli.cl_sem);
4188 imp = obd->u.cli.cl_import;
4189 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4191 ptlrpc_invalidate_import(imp);
4192 if (imp->imp_rq_pool) {
4193 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4194 imp->imp_rq_pool = NULL;
4196 class_destroy_import(imp);
4197 up_write(&obd->u.cli.cl_sem);
4198 obd->u.cli.cl_import = NULL;
4200 rc = obd_llog_finish(obd, 0);
4202 CERROR("failed to cleanup llogging subsystems\n");
4209 int osc_cleanup(struct obd_device *obd)
4211 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4215 ptlrpc_lprocfs_unregister_obd(obd);
4216 lprocfs_obd_cleanup(obd);
4218 spin_lock(&oscc->oscc_lock);
4219 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
4220 oscc->oscc_flags |= OSCC_FLAG_EXITING;
4221 spin_unlock(&oscc->oscc_lock);
4223 /* free memory of osc quota cache */
4224 lquota_cleanup(quota_interface, obd);
4226 rc = client_obd_cleanup(obd);
4232 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4234 struct lprocfs_static_vars lvars = { 0 };
4237 lprocfs_osc_init_vars(&lvars);
4239 switch (lcfg->lcfg_command) {
4241 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4251 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4253 return osc_process_config_base(obd, buf);
4256 struct obd_ops osc_obd_ops = {
4257 .o_owner = THIS_MODULE,
4258 .o_setup = osc_setup,
4259 .o_precleanup = osc_precleanup,
4260 .o_cleanup = osc_cleanup,
4261 .o_add_conn = client_import_add_conn,
4262 .o_del_conn = client_import_del_conn,
4263 .o_connect = client_connect_import,
4264 .o_reconnect = osc_reconnect,
4265 .o_disconnect = osc_disconnect,
4266 .o_statfs = osc_statfs,
4267 .o_statfs_async = osc_statfs_async,
4268 .o_packmd = osc_packmd,
4269 .o_unpackmd = osc_unpackmd,
4270 .o_precreate = osc_precreate,
4271 .o_create = osc_create,
4272 .o_destroy = osc_destroy,
4273 .o_getattr = osc_getattr,
4274 .o_getattr_async = osc_getattr_async,
4275 .o_setattr = osc_setattr,
4276 .o_setattr_async = osc_setattr_async,
4278 .o_punch = osc_punch,
4280 .o_enqueue = osc_enqueue,
4281 .o_change_cbdata = osc_change_cbdata,
4282 .o_cancel = osc_cancel,
4283 .o_cancel_unused = osc_cancel_unused,
4284 .o_iocontrol = osc_iocontrol,
4285 .o_get_info = osc_get_info,
4286 .o_set_info_async = osc_set_info_async,
4287 .o_import_event = osc_import_event,
4288 .o_llog_init = osc_llog_init,
4289 .o_llog_finish = osc_llog_finish,
4290 .o_process_config = osc_process_config,
4293 extern struct lu_kmem_descr osc_caches[];
4294 extern spinlock_t osc_ast_guard;
4295 extern struct lock_class_key osc_ast_guard_class;
4297 int __init osc_init(void)
4299 struct lprocfs_static_vars lvars = { 0 };
4303 /* print an address of _any_ initialized kernel symbol from this
4304 * module, to allow debugging with gdb that doesn't support data
4305 * symbols from modules.*/
4306 CDEBUG(D_CONSOLE, "Lustre OSC module (%p).\n", &osc_caches);
4308 rc = lu_kmem_init(osc_caches);
4310 lprocfs_osc_init_vars(&lvars);
4312 request_module("lquota");
4313 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4314 lquota_init(quota_interface);
4315 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4317 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4318 LUSTRE_OSC_NAME, &osc_device_type);
4320 if (quota_interface)
4321 PORTAL_SYMBOL_PUT(osc_quota_interface);
4322 lu_kmem_fini(osc_caches);
4326 spin_lock_init(&osc_ast_guard);
4327 lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4333 static void /*__exit*/ osc_exit(void)
4335 lu_device_type_fini(&osc_device_type);
4337 lquota_exit(quota_interface);
4338 if (quota_interface)
4339 PORTAL_SYMBOL_PUT(osc_quota_interface);
4341 class_unregister_type(LUSTRE_OSC_NAME);
4342 lu_kmem_fini(osc_caches);
4345 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4346 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4347 MODULE_LICENSE("GPL");
4349 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);