1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_OSC
42 #include <libcfs/libcfs.h>
45 # include <liblustre.h>
48 #include <lustre_dlm.h>
49 #include <lustre_net.h>
50 #include <lustre/lustre_user.h>
51 #include <obd_cksum.h>
59 #include <lustre_ha.h>
60 #include <lprocfs_status.h>
61 #include <lustre_log.h>
62 #include <lustre_debug.h>
63 #include <lustre_param.h>
64 #include "osc_internal.h"
66 static quota_interface_t *quota_interface = NULL;
67 extern quota_interface_t osc_quota_interface;
69 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
70 static int brw_interpret(const struct lu_env *env,
71 struct ptlrpc_request *req, void *data, int rc);
72 int osc_cleanup(struct obd_device *obd);
74 /* Pack OSC object metadata for disk storage (LE byte order). */
75 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
76 struct lov_stripe_md *lsm)
81 lmm_size = sizeof(**lmmp);
86 OBD_FREE(*lmmp, lmm_size);
92 OBD_ALLOC(*lmmp, lmm_size);
98 LASSERT(lsm->lsm_object_id);
99 LASSERT_MDS_GROUP(lsm->lsm_object_gr);
100 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
101 (*lmmp)->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
107 /* Unpack OSC object metadata from disk storage (LE byte order). */
108 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
109 struct lov_mds_md *lmm, int lmm_bytes)
115 if (lmm_bytes < sizeof (*lmm)) {
116 CERROR("lov_mds_md too small: %d, need %d\n",
117 lmm_bytes, (int)sizeof(*lmm));
120 /* XXX LOV_MAGIC etc check? */
122 if (lmm->lmm_object_id == 0) {
123 CERROR("lov_mds_md: zero lmm_object_id\n");
128 lsm_size = lov_stripe_md_size(1);
132 if (*lsmp != NULL && lmm == NULL) {
133 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
134 OBD_FREE(*lsmp, lsm_size);
140 OBD_ALLOC(*lsmp, lsm_size);
143 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
144 if ((*lsmp)->lsm_oinfo[0] == NULL) {
145 OBD_FREE(*lsmp, lsm_size);
148 loi_init((*lsmp)->lsm_oinfo[0]);
152 /* XXX zero *lsmp? */
153 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
154 (*lsmp)->lsm_object_gr = le64_to_cpu (lmm->lmm_object_gr);
155 LASSERT((*lsmp)->lsm_object_id);
156 LASSERT_MDS_GROUP((*lsmp)->lsm_object_gr);
159 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
164 static inline void osc_pack_capa(struct ptlrpc_request *req,
165 struct ost_body *body, void *capa)
167 struct obd_capa *oc = (struct obd_capa *)capa;
168 struct lustre_capa *c;
173 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
176 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
177 DEBUG_CAPA(D_SEC, c, "pack");
180 static inline void osc_pack_req_body(struct ptlrpc_request *req,
181 struct obd_info *oinfo)
183 struct ost_body *body;
185 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
188 lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
189 osc_pack_capa(req, body, oinfo->oi_capa);
192 static inline void osc_set_capa_size(struct ptlrpc_request *req,
193 const struct req_msg_field *field,
197 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
199 /* it is already calculated as sizeof struct obd_capa */
203 static int osc_getattr_interpret(const struct lu_env *env,
204 struct ptlrpc_request *req,
205 struct osc_async_args *aa, int rc)
207 struct ost_body *body;
213 body = 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 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->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 lustre_get_wire_obdo(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 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
317 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
321 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
322 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
324 ptlrpc_request_free(req);
328 osc_pack_req_body(req, oinfo);
330 ptlrpc_request_set_replen(req);
332 rc = ptlrpc_queue_wait(req);
336 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
338 GOTO(out, rc = -EPROTO);
340 lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
344 ptlrpc_req_finished(req);
348 static int osc_setattr_interpret(const struct lu_env *env,
349 struct ptlrpc_request *req,
350 struct osc_async_args *aa, int rc)
352 struct ost_body *body;
358 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
360 GOTO(out, rc = -EPROTO);
362 lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
364 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
368 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
369 struct obd_trans_info *oti,
370 struct ptlrpc_request_set *rqset)
372 struct ptlrpc_request *req;
373 struct osc_async_args *aa;
377 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
381 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
382 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
384 ptlrpc_request_free(req);
388 osc_pack_req_body(req, oinfo);
390 ptlrpc_request_set_replen(req);
392 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
394 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
397 /* do mds to ost setattr asynchronously */
399 /* Do not wait for response. */
400 ptlrpcd_add_req(req, PSCOPE_OTHER);
402 req->rq_interpret_reply =
403 (ptlrpc_interpterer_t)osc_setattr_interpret;
405 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
406 aa = ptlrpc_req_async_args(req);
409 ptlrpc_set_add_req(rqset, req);
415 int osc_real_create(struct obd_export *exp, struct obdo *oa,
416 struct lov_stripe_md **ea, struct obd_trans_info *oti)
418 struct ptlrpc_request *req;
419 struct ost_body *body;
420 struct lov_stripe_md *lsm;
429 rc = obd_alloc_memmd(exp, &lsm);
434 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
436 GOTO(out, rc = -ENOMEM);
438 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
440 ptlrpc_request_free(req);
444 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
446 lustre_set_wire_obdo(&body->oa, oa);
448 ptlrpc_request_set_replen(req);
450 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
451 oa->o_flags == OBD_FL_DELORPHAN) {
453 "delorphan from OST integration");
454 /* Don't resend the delorphan req */
455 req->rq_no_resend = req->rq_no_delay = 1;
458 rc = ptlrpc_queue_wait(req);
462 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
464 GOTO(out_req, rc = -EPROTO);
466 lustre_get_wire_obdo(oa, &body->oa);
468 /* This should really be sent by the OST */
469 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
470 oa->o_valid |= OBD_MD_FLBLKSZ;
472 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
473 * have valid lsm_oinfo data structs, so don't go touching that.
474 * This needs to be fixed in a big way.
476 lsm->lsm_object_id = oa->o_id;
477 lsm->lsm_object_gr = oa->o_gr;
481 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
483 if (oa->o_valid & OBD_MD_FLCOOKIE) {
484 if (!oti->oti_logcookies)
485 oti_alloc_cookies(oti, 1);
486 *oti->oti_logcookies = oa->o_lcookie;
490 CDEBUG(D_HA, "transno: "LPD64"\n",
491 lustre_msg_get_transno(req->rq_repmsg));
493 ptlrpc_req_finished(req);
496 obd_free_memmd(exp, &lsm);
500 static int osc_punch_interpret(const struct lu_env *env,
501 struct ptlrpc_request *req,
502 struct osc_punch_args *aa, int rc)
504 struct ost_body *body;
510 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
512 GOTO(out, rc = -EPROTO);
514 lustre_get_wire_obdo(aa->pa_oa, &body->oa);
516 rc = aa->pa_upcall(aa->pa_cookie, rc);
520 int osc_punch_base(struct obd_export *exp, struct obdo *oa,
521 struct obd_capa *capa,
522 obd_enqueue_update_f upcall, void *cookie,
523 struct ptlrpc_request_set *rqset)
525 struct ptlrpc_request *req;
526 struct osc_punch_args *aa;
527 struct ost_body *body;
531 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
535 osc_set_capa_size(req, &RMF_CAPA1, capa);
536 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
538 ptlrpc_request_free(req);
541 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
542 ptlrpc_at_set_req_timeout(req);
544 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
546 lustre_set_wire_obdo(&body->oa, oa);
547 osc_pack_capa(req, body, capa);
549 ptlrpc_request_set_replen(req);
552 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_punch_interpret;
553 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
554 aa = ptlrpc_req_async_args(req);
556 aa->pa_upcall = upcall;
557 aa->pa_cookie = cookie;
558 if (rqset == PTLRPCD_SET)
559 ptlrpcd_add_req(req, PSCOPE_OTHER);
561 ptlrpc_set_add_req(rqset, req);
566 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
567 struct obd_trans_info *oti,
568 struct ptlrpc_request_set *rqset)
570 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
571 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
572 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
573 return osc_punch_base(exp, oinfo->oi_oa, oinfo->oi_capa,
574 oinfo->oi_cb_up, oinfo, rqset);
577 static int osc_sync(struct obd_export *exp, struct obdo *oa,
578 struct lov_stripe_md *md, obd_size start, obd_size end,
581 struct ptlrpc_request *req;
582 struct ost_body *body;
587 CDEBUG(D_INFO, "oa NULL\n");
591 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
595 osc_set_capa_size(req, &RMF_CAPA1, capa);
596 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
598 ptlrpc_request_free(req);
602 /* overload the size and blocks fields in the oa with start/end */
603 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
605 lustre_set_wire_obdo(&body->oa, oa);
606 body->oa.o_size = start;
607 body->oa.o_blocks = end;
608 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
609 osc_pack_capa(req, body, capa);
611 ptlrpc_request_set_replen(req);
613 rc = ptlrpc_queue_wait(req);
617 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
619 GOTO(out, rc = -EPROTO);
621 lustre_get_wire_obdo(oa, &body->oa);
625 ptlrpc_req_finished(req);
629 /* Find and cancel locally locks matched by @mode in the resource found by
630 * @objid. Found locks are added into @cancel list. Returns the amount of
631 * locks added to @cancels list. */
632 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
633 struct list_head *cancels, ldlm_mode_t mode,
636 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
637 struct ldlm_res_id res_id;
638 struct ldlm_resource *res;
642 osc_build_res_name(oa->o_id, oa->o_gr, &res_id);
643 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
647 LDLM_RESOURCE_ADDREF(res);
648 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
649 lock_flags, 0, NULL);
650 LDLM_RESOURCE_DELREF(res);
651 ldlm_resource_putref(res);
655 static int osc_destroy_interpret(const struct lu_env *env,
656 struct ptlrpc_request *req, void *data,
659 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
661 atomic_dec(&cli->cl_destroy_in_flight);
662 cfs_waitq_signal(&cli->cl_destroy_waitq);
666 static int osc_can_send_destroy(struct client_obd *cli)
668 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
669 cli->cl_max_rpcs_in_flight) {
670 /* The destroy request can be sent */
673 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
674 cli->cl_max_rpcs_in_flight) {
676 * The counter has been modified between the two atomic
679 cfs_waitq_signal(&cli->cl_destroy_waitq);
684 /* Destroy requests can be async always on the client, and we don't even really
685 * care about the return code since the client cannot do anything at all about
687 * When the MDS is unlinking a filename, it saves the file objects into a
688 * recovery llog, and these object records are cancelled when the OST reports
689 * they were destroyed and sync'd to disk (i.e. transaction committed).
690 * If the client dies, or the OST is down when the object should be destroyed,
691 * the records are not cancelled, and when the OST reconnects to the MDS next,
692 * it will retrieve the llog unlink logs and then sends the log cancellation
693 * cookies to the MDS after committing destroy transactions. */
694 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
695 struct lov_stripe_md *ea, struct obd_trans_info *oti,
696 struct obd_export *md_export, void *capa)
698 struct client_obd *cli = &exp->exp_obd->u.cli;
699 struct ptlrpc_request *req;
700 struct ost_body *body;
701 CFS_LIST_HEAD(cancels);
706 CDEBUG(D_INFO, "oa NULL\n");
710 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
711 LDLM_FL_DISCARD_DATA);
713 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
715 ldlm_lock_list_put(&cancels, l_bl_ast, count);
719 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
720 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
723 ptlrpc_request_free(req);
727 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
728 ptlrpc_at_set_req_timeout(req);
730 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
731 oa->o_lcookie = *oti->oti_logcookies;
732 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
734 lustre_set_wire_obdo(&body->oa, oa);
736 osc_pack_capa(req, body, (struct obd_capa *)capa);
737 ptlrpc_request_set_replen(req);
739 /* don't throttle destroy RPCs for the MDT */
740 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
741 req->rq_interpret_reply = osc_destroy_interpret;
742 if (!osc_can_send_destroy(cli)) {
743 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
747 * Wait until the number of on-going destroy RPCs drops
748 * under max_rpc_in_flight
750 l_wait_event_exclusive(cli->cl_destroy_waitq,
751 osc_can_send_destroy(cli), &lwi);
755 /* Do not wait for response */
756 ptlrpcd_add_req(req, PSCOPE_OTHER);
760 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
763 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
765 LASSERT(!(oa->o_valid & bits));
768 client_obd_list_lock(&cli->cl_loi_list_lock);
769 oa->o_dirty = cli->cl_dirty;
770 if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
771 CERROR("dirty %lu - %lu > dirty_max %lu\n",
772 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
774 } else if (atomic_read(&obd_dirty_pages) -
775 atomic_read(&obd_dirty_transit_pages) > obd_max_dirty_pages){
776 CERROR("dirty %d - %d > system dirty_max %d\n",
777 atomic_read(&obd_dirty_pages),
778 atomic_read(&obd_dirty_transit_pages),
779 obd_max_dirty_pages);
781 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
782 CERROR("dirty %lu - dirty_max %lu too big???\n",
783 cli->cl_dirty, cli->cl_dirty_max);
786 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
787 (cli->cl_max_rpcs_in_flight + 1);
788 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
790 oa->o_grant = cli->cl_avail_grant;
791 oa->o_dropped = cli->cl_lost_grant;
792 cli->cl_lost_grant = 0;
793 client_obd_list_unlock(&cli->cl_loi_list_lock);
794 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
795 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
799 static void osc_update_next_shrink(struct client_obd *cli)
801 cli->cl_next_shrink_grant =
802 cfs_time_shift(cli->cl_grant_shrink_interval);
803 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
804 cli->cl_next_shrink_grant);
807 /* caller must hold loi_list_lock */
808 static void osc_consume_write_grant(struct client_obd *cli,
809 struct brw_page *pga)
811 LASSERT(client_obd_list_is_locked(&cli->cl_loi_list_lock));
812 LASSERT(!(pga->flag & OBD_BRW_FROM_GRANT));
813 atomic_inc(&obd_dirty_pages);
814 cli->cl_dirty += CFS_PAGE_SIZE;
815 cli->cl_avail_grant -= CFS_PAGE_SIZE;
816 pga->flag |= OBD_BRW_FROM_GRANT;
817 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
818 CFS_PAGE_SIZE, pga, pga->pg);
819 LASSERT(cli->cl_avail_grant >= 0);
820 osc_update_next_shrink(cli);
823 /* the companion to osc_consume_write_grant, called when a brw has completed.
824 * must be called with the loi lock held. */
825 static void osc_release_write_grant(struct client_obd *cli,
826 struct brw_page *pga, int sent)
828 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
831 LASSERT(client_obd_list_is_locked(&cli->cl_loi_list_lock));
832 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
837 pga->flag &= ~OBD_BRW_FROM_GRANT;
838 atomic_dec(&obd_dirty_pages);
839 cli->cl_dirty -= CFS_PAGE_SIZE;
840 if (pga->flag & OBD_BRW_NOCACHE) {
841 pga->flag &= ~OBD_BRW_NOCACHE;
842 atomic_dec(&obd_dirty_transit_pages);
843 cli->cl_dirty_transit -= CFS_PAGE_SIZE;
846 cli->cl_lost_grant += CFS_PAGE_SIZE;
847 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
848 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
849 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
850 /* For short writes we shouldn't count parts of pages that
851 * span a whole block on the OST side, or our accounting goes
852 * wrong. Should match the code in filter_grant_check. */
853 int offset = pga->off & ~CFS_PAGE_MASK;
854 int count = pga->count + (offset & (blocksize - 1));
855 int end = (offset + pga->count) & (blocksize - 1);
857 count += blocksize - end;
859 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
860 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
861 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
862 cli->cl_avail_grant, cli->cl_dirty);
868 static unsigned long rpcs_in_flight(struct client_obd *cli)
870 return cli->cl_r_in_flight + cli->cl_w_in_flight;
873 /* caller must hold loi_list_lock */
874 void osc_wake_cache_waiters(struct client_obd *cli)
876 struct list_head *l, *tmp;
877 struct osc_cache_waiter *ocw;
880 list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
881 /* if we can't dirty more, we must wait until some is written */
882 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
883 (atomic_read(&obd_dirty_pages) + 1 > obd_max_dirty_pages)) {
884 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
885 "osc max %ld, sys max %d\n", cli->cl_dirty,
886 cli->cl_dirty_max, obd_max_dirty_pages);
890 /* if still dirty cache but no grant wait for pending RPCs that
891 * may yet return us some grant before doing sync writes */
892 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
893 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
894 cli->cl_w_in_flight);
898 ocw = list_entry(l, struct osc_cache_waiter, ocw_entry);
899 list_del_init(&ocw->ocw_entry);
900 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
901 /* no more RPCs in flight to return grant, do sync IO */
902 ocw->ocw_rc = -EDQUOT;
903 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
905 osc_consume_write_grant(cli,
906 &ocw->ocw_oap->oap_brw_page);
909 cfs_waitq_signal(&ocw->ocw_waitq);
915 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
917 client_obd_list_lock(&cli->cl_loi_list_lock);
918 cli->cl_avail_grant += grant;
919 client_obd_list_unlock(&cli->cl_loi_list_lock);
922 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
924 if (body->oa.o_valid & OBD_MD_FLGRANT) {
925 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
926 __osc_update_grant(cli, body->oa.o_grant);
930 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
931 void *key, obd_count vallen, void *val,
932 struct ptlrpc_request_set *set);
934 static int osc_shrink_grant_interpret(const struct lu_env *env,
935 struct ptlrpc_request *req,
938 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
939 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
940 struct ost_body *body;
943 __osc_update_grant(cli, oa->o_grant);
947 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
949 osc_update_grant(cli, body);
955 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
957 client_obd_list_lock(&cli->cl_loi_list_lock);
958 oa->o_grant = cli->cl_avail_grant / 4;
959 cli->cl_avail_grant -= oa->o_grant;
960 client_obd_list_unlock(&cli->cl_loi_list_lock);
961 oa->o_flags |= OBD_FL_SHRINK_GRANT;
962 osc_update_next_shrink(cli);
965 /* Shrink the current grant, either from some large amount to enough for a
966 * full set of in-flight RPCs, or if we have already shrunk to that limit
967 * then to enough for a single RPC. This avoids keeping more grant than
968 * needed, and avoids shrinking the grant piecemeal. */
969 static int osc_shrink_grant(struct client_obd *cli)
971 long target = (cli->cl_max_rpcs_in_flight + 1) *
972 cli->cl_max_pages_per_rpc;
974 client_obd_list_lock(&cli->cl_loi_list_lock);
975 if (cli->cl_avail_grant <= target)
976 target = cli->cl_max_pages_per_rpc;
977 client_obd_list_unlock(&cli->cl_loi_list_lock);
979 return osc_shrink_grant_to_target(cli, target);
982 int osc_shrink_grant_to_target(struct client_obd *cli, long target)
985 struct ost_body *body;
988 client_obd_list_lock(&cli->cl_loi_list_lock);
989 /* Don't shrink if we are already above or below the desired limit
990 * We don't want to shrink below a single RPC, as that will negatively
991 * impact block allocation and long-term performance. */
992 if (target < cli->cl_max_pages_per_rpc)
993 target = cli->cl_max_pages_per_rpc;
995 if (target >= cli->cl_avail_grant) {
996 client_obd_list_unlock(&cli->cl_loi_list_lock);
999 client_obd_list_unlock(&cli->cl_loi_list_lock);
1001 OBD_ALLOC_PTR(body);
1005 osc_announce_cached(cli, &body->oa, 0);
1007 client_obd_list_lock(&cli->cl_loi_list_lock);
1008 body->oa.o_grant = cli->cl_avail_grant - target;
1009 cli->cl_avail_grant = target;
1010 client_obd_list_unlock(&cli->cl_loi_list_lock);
1011 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
1012 osc_update_next_shrink(cli);
1014 rc = osc_set_info_async(cli->cl_import->imp_obd->obd_self_export,
1015 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
1016 sizeof(*body), body, NULL);
1018 __osc_update_grant(cli, body->oa.o_grant);
1023 #define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
1024 static int osc_should_shrink_grant(struct client_obd *client)
1026 cfs_time_t time = cfs_time_current();
1027 cfs_time_t next_shrink = client->cl_next_shrink_grant;
1028 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
1029 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
1030 client->cl_avail_grant > GRANT_SHRINK_LIMIT)
1033 osc_update_next_shrink(client);
1038 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
1040 struct client_obd *client;
1042 list_for_each_entry(client, &item->ti_obd_list, cl_grant_shrink_list) {
1043 if (osc_should_shrink_grant(client))
1044 osc_shrink_grant(client);
1049 static int osc_add_shrink_grant(struct client_obd *client)
1053 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1055 osc_grant_shrink_grant_cb, NULL,
1056 &client->cl_grant_shrink_list);
1058 CERROR("add grant client %s error %d\n",
1059 client->cl_import->imp_obd->obd_name, rc);
1062 CDEBUG(D_CACHE, "add grant client %s \n",
1063 client->cl_import->imp_obd->obd_name);
1064 osc_update_next_shrink(client);
1068 static int osc_del_shrink_grant(struct client_obd *client)
1070 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1074 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1076 client_obd_list_lock(&cli->cl_loi_list_lock);
1077 cli->cl_avail_grant = ocd->ocd_grant;
1078 client_obd_list_unlock(&cli->cl_loi_list_lock);
1080 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1081 list_empty(&cli->cl_grant_shrink_list))
1082 osc_add_shrink_grant(cli);
1084 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld \n",
1085 cli->cl_avail_grant, cli->cl_lost_grant);
1086 LASSERT(cli->cl_avail_grant >= 0);
1089 /* We assume that the reason this OSC got a short read is because it read
1090 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1091 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1092 * this stripe never got written at or beyond this stripe offset yet. */
1093 static void handle_short_read(int nob_read, obd_count page_count,
1094 struct brw_page **pga)
1099 /* skip bytes read OK */
1100 while (nob_read > 0) {
1101 LASSERT (page_count > 0);
1103 if (pga[i]->count > nob_read) {
1104 /* EOF inside this page */
1105 ptr = cfs_kmap(pga[i]->pg) +
1106 (pga[i]->off & ~CFS_PAGE_MASK);
1107 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1108 cfs_kunmap(pga[i]->pg);
1114 nob_read -= pga[i]->count;
1119 /* zero remaining pages */
1120 while (page_count-- > 0) {
1121 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1122 memset(ptr, 0, pga[i]->count);
1123 cfs_kunmap(pga[i]->pg);
1128 static int check_write_rcs(struct ptlrpc_request *req,
1129 int requested_nob, int niocount,
1130 obd_count page_count, struct brw_page **pga)
1134 /* return error if any niobuf was in error */
1135 remote_rcs = lustre_swab_repbuf(req, REQ_REC_OFF + 1,
1136 sizeof(*remote_rcs) * niocount, NULL);
1137 if (remote_rcs == NULL) {
1138 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1141 if (lustre_msg_swabbed(req->rq_repmsg))
1142 for (i = 0; i < niocount; i++)
1143 __swab32s(&remote_rcs[i]);
1145 for (i = 0; i < niocount; i++) {
1146 if (remote_rcs[i] < 0)
1147 return(remote_rcs[i]);
1149 if (remote_rcs[i] != 0) {
1150 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1151 i, remote_rcs[i], req);
1156 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1157 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1158 req->rq_bulk->bd_nob_transferred, requested_nob);
1165 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1167 if (p1->flag != p2->flag) {
1168 unsigned mask = ~(OBD_BRW_FROM_GRANT|
1169 OBD_BRW_NOCACHE|OBD_BRW_SYNC);
1171 /* warn if we try to combine flags that we don't know to be
1172 * safe to combine */
1173 if ((p1->flag & mask) != (p2->flag & mask))
1174 CERROR("is it ok to have flags 0x%x and 0x%x in the "
1175 "same brw?\n", p1->flag, p2->flag);
1179 return (p1->off + p1->count == p2->off);
1182 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1183 struct brw_page **pga, int opc,
1184 cksum_type_t cksum_type)
1189 LASSERT (pg_count > 0);
1190 cksum = init_checksum(cksum_type);
1191 while (nob > 0 && pg_count > 0) {
1192 unsigned char *ptr = cfs_kmap(pga[i]->pg);
1193 int off = pga[i]->off & ~CFS_PAGE_MASK;
1194 int count = pga[i]->count > nob ? nob : pga[i]->count;
1196 /* corrupt the data before we compute the checksum, to
1197 * simulate an OST->client data error */
1198 if (i == 0 && opc == OST_READ &&
1199 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
1200 memcpy(ptr + off, "bad1", min(4, nob));
1201 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
1202 cfs_kunmap(pga[i]->pg);
1203 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1206 nob -= pga[i]->count;
1210 /* For sending we only compute the wrong checksum instead
1211 * of corrupting the data so it is still correct on a redo */
1212 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1218 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1219 struct lov_stripe_md *lsm, obd_count page_count,
1220 struct brw_page **pga,
1221 struct ptlrpc_request **reqp,
1222 struct obd_capa *ocapa, int reserve)
1224 struct ptlrpc_request *req;
1225 struct ptlrpc_bulk_desc *desc;
1226 struct ost_body *body;
1227 struct obd_ioobj *ioobj;
1228 struct niobuf_remote *niobuf;
1229 int niocount, i, requested_nob, opc, rc;
1230 struct osc_brw_async_args *aa;
1231 struct req_capsule *pill;
1232 struct brw_page *pg_prev;
1235 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1236 RETURN(-ENOMEM); /* Recoverable */
1237 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1238 RETURN(-EINVAL); /* Fatal */
1240 if ((cmd & OBD_BRW_WRITE) != 0) {
1242 req = ptlrpc_request_alloc_pool(cli->cl_import,
1243 cli->cl_import->imp_rq_pool,
1247 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW);
1252 for (niocount = i = 1; i < page_count; i++) {
1253 if (!can_merge_pages(pga[i - 1], pga[i]))
1257 pill = &req->rq_pill;
1258 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1259 niocount * sizeof(*niobuf));
1260 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1262 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1264 ptlrpc_request_free(req);
1267 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1268 ptlrpc_at_set_req_timeout(req);
1270 if (opc == OST_WRITE)
1271 desc = ptlrpc_prep_bulk_imp(req, page_count,
1272 BULK_GET_SOURCE, OST_BULK_PORTAL);
1274 desc = ptlrpc_prep_bulk_imp(req, page_count,
1275 BULK_PUT_SINK, OST_BULK_PORTAL);
1278 GOTO(out, rc = -ENOMEM);
1279 /* NB request now owns desc and will free it when it gets freed */
1281 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1282 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1283 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1284 LASSERT(body && ioobj && niobuf);
1286 lustre_set_wire_obdo(&body->oa, oa);
1288 obdo_to_ioobj(oa, ioobj);
1289 ioobj->ioo_bufcnt = niocount;
1290 osc_pack_capa(req, body, ocapa);
1291 LASSERT (page_count > 0);
1293 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1294 struct brw_page *pg = pga[i];
1296 LASSERT(pg->count > 0);
1297 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1298 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1299 pg->off, pg->count);
1301 LASSERTF(i == 0 || pg->off > pg_prev->off,
1302 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1303 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1305 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1306 pg_prev->pg, page_private(pg_prev->pg),
1307 pg_prev->pg->index, pg_prev->off);
1309 LASSERTF(i == 0 || pg->off > pg_prev->off,
1310 "i %d p_c %u\n", i, page_count);
1312 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1313 (pg->flag & OBD_BRW_SRVLOCK));
1315 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1317 requested_nob += pg->count;
1319 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1321 niobuf->len += pg->count;
1323 niobuf->offset = pg->off;
1324 niobuf->len = pg->count;
1325 niobuf->flags = pg->flag;
1330 LASSERTF((void *)(niobuf - niocount) ==
1331 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1332 niocount * sizeof(*niobuf)),
1333 "want %p - real %p\n", lustre_msg_buf(req->rq_reqmsg,
1334 REQ_REC_OFF + 2, niocount * sizeof(*niobuf)),
1335 (void *)(niobuf - niocount));
1337 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1338 if (osc_should_shrink_grant(cli))
1339 osc_shrink_grant_local(cli, &body->oa);
1341 /* size[REQ_REC_OFF] still sizeof (*body) */
1342 if (opc == OST_WRITE) {
1343 if (unlikely(cli->cl_checksum) &&
1344 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1345 /* store cl_cksum_type in a local variable since
1346 * it can be changed via lprocfs */
1347 cksum_type_t cksum_type = cli->cl_cksum_type;
1349 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1350 oa->o_flags &= OBD_FL_LOCAL_MASK;
1351 body->oa.o_flags = 0;
1353 body->oa.o_flags |= cksum_type_pack(cksum_type);
1354 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1355 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1359 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1361 /* save this in 'oa', too, for later checking */
1362 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1363 oa->o_flags |= cksum_type_pack(cksum_type);
1365 /* clear out the checksum flag, in case this is a
1366 * resend but cl_checksum is no longer set. b=11238 */
1367 oa->o_valid &= ~OBD_MD_FLCKSUM;
1369 oa->o_cksum = body->oa.o_cksum;
1370 /* 1 RC per niobuf */
1371 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER,
1372 sizeof(__u32) * niocount);
1374 if (unlikely(cli->cl_checksum) &&
1375 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1376 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1377 body->oa.o_flags = 0;
1378 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1379 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1381 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER, 0);
1382 /* 1 RC for the whole I/O */
1384 ptlrpc_request_set_replen(req);
1386 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1387 aa = ptlrpc_req_async_args(req);
1389 aa->aa_requested_nob = requested_nob;
1390 aa->aa_nio_count = niocount;
1391 aa->aa_page_count = page_count;
1395 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1396 if (ocapa && reserve)
1397 aa->aa_ocapa = capa_get(ocapa);
1403 ptlrpc_req_finished(req);
1407 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1408 __u32 client_cksum, __u32 server_cksum, int nob,
1409 obd_count page_count, struct brw_page **pga,
1410 cksum_type_t client_cksum_type)
1414 cksum_type_t cksum_type;
1416 if (server_cksum == client_cksum) {
1417 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1421 if (oa->o_valid & OBD_MD_FLFLAGS)
1422 cksum_type = cksum_type_unpack(oa->o_flags);
1424 cksum_type = OBD_CKSUM_CRC32;
1426 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1429 if (cksum_type != client_cksum_type)
1430 msg = "the server did not use the checksum type specified in "
1431 "the original request - likely a protocol problem";
1432 else if (new_cksum == server_cksum)
1433 msg = "changed on the client after we checksummed it - "
1434 "likely false positive due to mmap IO (bug 11742)";
1435 else if (new_cksum == client_cksum)
1436 msg = "changed in transit before arrival at OST";
1438 msg = "changed in transit AND doesn't match the original - "
1439 "likely false positive due to mmap IO (bug 11742)";
1441 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1442 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1443 "["LPU64"-"LPU64"]\n",
1444 msg, libcfs_nid2str(peer->nid),
1445 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1446 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1449 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1451 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1452 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1453 "client csum now %x\n", client_cksum, client_cksum_type,
1454 server_cksum, cksum_type, new_cksum);
1458 /* Note rc enters this function as number of bytes transferred */
1459 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1461 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1462 const lnet_process_id_t *peer =
1463 &req->rq_import->imp_connection->c_peer;
1464 struct client_obd *cli = aa->aa_cli;
1465 struct ost_body *body;
1466 __u32 client_cksum = 0;
1469 if (rc < 0 && rc != -EDQUOT)
1472 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1473 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1474 lustre_swab_ost_body);
1476 CDEBUG(D_INFO, "Can't unpack body\n");
1480 /* set/clear over quota flag for a uid/gid */
1481 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1482 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1483 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1485 lquota_setdq(quota_interface, cli, qid, body->oa.o_valid,
1492 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1493 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1495 osc_update_grant(cli, body);
1497 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1499 CERROR("Unexpected +ve rc %d\n", rc);
1502 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1504 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1507 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1508 check_write_checksum(&body->oa, peer, client_cksum,
1509 body->oa.o_cksum, aa->aa_requested_nob,
1510 aa->aa_page_count, aa->aa_ppga,
1511 cksum_type_unpack(aa->aa_oa->o_flags)))
1514 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1515 aa->aa_page_count, aa->aa_ppga);
1519 /* The rest of this function executes only for OST_READs */
1521 /* if unwrap_bulk failed, return -EAGAIN to retry */
1522 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1524 GOTO(out, rc = -EAGAIN);
1526 if (rc > aa->aa_requested_nob) {
1527 CERROR("Unexpected rc %d (%d requested)\n", rc,
1528 aa->aa_requested_nob);
1532 if (rc != req->rq_bulk->bd_nob_transferred) {
1533 CERROR ("Unexpected rc %d (%d transferred)\n",
1534 rc, req->rq_bulk->bd_nob_transferred);
1538 if (rc < aa->aa_requested_nob)
1539 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1541 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1542 static int cksum_counter;
1543 __u32 server_cksum = body->oa.o_cksum;
1546 cksum_type_t cksum_type;
1548 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1549 cksum_type = cksum_type_unpack(body->oa.o_flags);
1551 cksum_type = OBD_CKSUM_CRC32;
1552 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1553 aa->aa_ppga, OST_READ,
1556 if (peer->nid == req->rq_bulk->bd_sender) {
1560 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1563 if (server_cksum == ~0 && rc > 0) {
1564 CERROR("Protocol error: server %s set the 'checksum' "
1565 "bit, but didn't send a checksum. Not fatal, "
1566 "but please notify on http://bugzilla.lustre.org/\n",
1567 libcfs_nid2str(peer->nid));
1568 } else if (server_cksum != client_cksum) {
1569 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1570 "%s%s%s inum "LPU64"/"LPU64" object "
1571 LPU64"/"LPU64" extent "
1572 "["LPU64"-"LPU64"]\n",
1573 req->rq_import->imp_obd->obd_name,
1574 libcfs_nid2str(peer->nid),
1576 body->oa.o_valid & OBD_MD_FLFID ?
1577 body->oa.o_fid : (__u64)0,
1578 body->oa.o_valid & OBD_MD_FLFID ?
1579 body->oa.o_generation :(__u64)0,
1581 body->oa.o_valid & OBD_MD_FLGROUP ?
1582 body->oa.o_gr : (__u64)0,
1583 aa->aa_ppga[0]->off,
1584 aa->aa_ppga[aa->aa_page_count-1]->off +
1585 aa->aa_ppga[aa->aa_page_count-1]->count -
1587 CERROR("client %x, server %x, cksum_type %x\n",
1588 client_cksum, server_cksum, cksum_type);
1590 aa->aa_oa->o_cksum = client_cksum;
1594 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1597 } else if (unlikely(client_cksum)) {
1598 static int cksum_missed;
1601 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1602 CERROR("Checksum %u requested from %s but not sent\n",
1603 cksum_missed, libcfs_nid2str(peer->nid));
1609 lustre_get_wire_obdo(aa->aa_oa, &body->oa);
1614 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1615 struct lov_stripe_md *lsm,
1616 obd_count page_count, struct brw_page **pga,
1617 struct obd_capa *ocapa)
1619 struct ptlrpc_request *req;
1623 struct l_wait_info lwi;
1627 cfs_waitq_init(&waitq);
1630 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1631 page_count, pga, &req, ocapa, 0);
1635 rc = ptlrpc_queue_wait(req);
1637 if (rc == -ETIMEDOUT && req->rq_resend) {
1638 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1639 ptlrpc_req_finished(req);
1643 rc = osc_brw_fini_request(req, rc);
1645 ptlrpc_req_finished(req);
1646 if (osc_recoverable_error(rc)) {
1648 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1649 CERROR("too many resend retries, returning error\n");
1653 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1654 l_wait_event(waitq, 0, &lwi);
1662 int osc_brw_redo_request(struct ptlrpc_request *request,
1663 struct osc_brw_async_args *aa)
1665 struct ptlrpc_request *new_req;
1666 struct ptlrpc_request_set *set = request->rq_set;
1667 struct osc_brw_async_args *new_aa;
1668 struct osc_async_page *oap;
1672 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1673 CERROR("too many resend retries, returning error\n");
1677 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1679 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1680 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1681 aa->aa_cli, aa->aa_oa,
1682 NULL /* lsm unused by osc currently */,
1683 aa->aa_page_count, aa->aa_ppga,
1684 &new_req, aa->aa_ocapa, 0);
1688 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1690 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1691 if (oap->oap_request != NULL) {
1692 LASSERTF(request == oap->oap_request,
1693 "request %p != oap_request %p\n",
1694 request, oap->oap_request);
1695 if (oap->oap_interrupted) {
1696 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1697 ptlrpc_req_finished(new_req);
1702 /* New request takes over pga and oaps from old request.
1703 * Note that copying a list_head doesn't work, need to move it... */
1705 new_req->rq_interpret_reply = request->rq_interpret_reply;
1706 new_req->rq_async_args = request->rq_async_args;
1707 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1709 new_aa = ptlrpc_req_async_args(new_req);
1711 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1712 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1713 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1715 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1716 if (oap->oap_request) {
1717 ptlrpc_req_finished(oap->oap_request);
1718 oap->oap_request = ptlrpc_request_addref(new_req);
1722 new_aa->aa_ocapa = aa->aa_ocapa;
1723 aa->aa_ocapa = NULL;
1725 /* use ptlrpc_set_add_req is safe because interpret functions work
1726 * in check_set context. only one way exist with access to request
1727 * from different thread got -EINTR - this way protected with
1728 * cl_loi_list_lock */
1729 ptlrpc_set_add_req(set, new_req);
1731 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1733 DEBUG_REQ(D_INFO, new_req, "new request");
1738 * ugh, we want disk allocation on the target to happen in offset order. we'll
1739 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1740 * fine for our small page arrays and doesn't require allocation. its an
1741 * insertion sort that swaps elements that are strides apart, shrinking the
1742 * stride down until its '1' and the array is sorted.
1744 static void sort_brw_pages(struct brw_page **array, int num)
1747 struct brw_page *tmp;
1751 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1756 for (i = stride ; i < num ; i++) {
1759 while (j >= stride && array[j - stride]->off > tmp->off) {
1760 array[j] = array[j - stride];
1765 } while (stride > 1);
1768 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1774 LASSERT (pages > 0);
1775 offset = pg[i]->off & ~CFS_PAGE_MASK;
1779 if (pages == 0) /* that's all */
1782 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1783 return count; /* doesn't end on page boundary */
1786 offset = pg[i]->off & ~CFS_PAGE_MASK;
1787 if (offset != 0) /* doesn't start on page boundary */
1794 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1796 struct brw_page **ppga;
1799 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1803 for (i = 0; i < count; i++)
1808 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1810 LASSERT(ppga != NULL);
1811 OBD_FREE(ppga, sizeof(*ppga) * count);
1814 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1815 obd_count page_count, struct brw_page *pga,
1816 struct obd_trans_info *oti)
1818 struct obdo *saved_oa = NULL;
1819 struct brw_page **ppga, **orig;
1820 struct obd_import *imp = class_exp2cliimp(exp);
1821 struct client_obd *cli;
1822 int rc, page_count_orig;
1825 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1826 cli = &imp->imp_obd->u.cli;
1828 if (cmd & OBD_BRW_CHECK) {
1829 /* The caller just wants to know if there's a chance that this
1830 * I/O can succeed */
1832 if (imp->imp_invalid)
1837 /* test_brw with a failed create can trip this, maybe others. */
1838 LASSERT(cli->cl_max_pages_per_rpc);
1842 orig = ppga = osc_build_ppga(pga, page_count);
1845 page_count_orig = page_count;
1847 sort_brw_pages(ppga, page_count);
1848 while (page_count) {
1849 obd_count pages_per_brw;
1851 if (page_count > cli->cl_max_pages_per_rpc)
1852 pages_per_brw = cli->cl_max_pages_per_rpc;
1854 pages_per_brw = page_count;
1856 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1858 if (saved_oa != NULL) {
1859 /* restore previously saved oa */
1860 *oinfo->oi_oa = *saved_oa;
1861 } else if (page_count > pages_per_brw) {
1862 /* save a copy of oa (brw will clobber it) */
1863 OBDO_ALLOC(saved_oa);
1864 if (saved_oa == NULL)
1865 GOTO(out, rc = -ENOMEM);
1866 *saved_oa = *oinfo->oi_oa;
1869 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1870 pages_per_brw, ppga, oinfo->oi_capa);
1875 page_count -= pages_per_brw;
1876 ppga += pages_per_brw;
1880 osc_release_ppga(orig, page_count_orig);
1882 if (saved_oa != NULL)
1883 OBDO_FREE(saved_oa);
1888 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1889 * the dirty accounting. Writeback completes or truncate happens before
1890 * writing starts. Must be called with the loi lock held. */
1891 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1894 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1898 /* This maintains the lists of pending pages to read/write for a given object
1899 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1900 * to quickly find objects that are ready to send an RPC. */
1901 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1907 if (lop->lop_num_pending == 0)
1910 /* if we have an invalid import we want to drain the queued pages
1911 * by forcing them through rpcs that immediately fail and complete
1912 * the pages. recovery relies on this to empty the queued pages
1913 * before canceling the locks and evicting down the llite pages */
1914 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1917 /* stream rpcs in queue order as long as as there is an urgent page
1918 * queued. this is our cheap solution for good batching in the case
1919 * where writepage marks some random page in the middle of the file
1920 * as urgent because of, say, memory pressure */
1921 if (!list_empty(&lop->lop_urgent)) {
1922 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1925 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1926 optimal = cli->cl_max_pages_per_rpc;
1927 if (cmd & OBD_BRW_WRITE) {
1928 /* trigger a write rpc stream as long as there are dirtiers
1929 * waiting for space. as they're waiting, they're not going to
1930 * create more pages to coallesce with what's waiting.. */
1931 if (!list_empty(&cli->cl_cache_waiters)) {
1932 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1935 /* +16 to avoid triggering rpcs that would want to include pages
1936 * that are being queued but which can't be made ready until
1937 * the queuer finishes with the page. this is a wart for
1938 * llite::commit_write() */
1941 if (lop->lop_num_pending >= optimal)
1947 static int lop_makes_hprpc(struct loi_oap_pages *lop)
1949 struct osc_async_page *oap;
1952 if (list_empty(&lop->lop_urgent))
1955 oap = list_entry(lop->lop_urgent.next,
1956 struct osc_async_page, oap_urgent_item);
1958 if (oap->oap_async_flags & ASYNC_HP) {
1959 CDEBUG(D_CACHE, "hp request forcing RPC\n");
1966 static void on_list(struct list_head *item, struct list_head *list,
1969 if (list_empty(item) && should_be_on)
1970 list_add_tail(item, list);
1971 else if (!list_empty(item) && !should_be_on)
1972 list_del_init(item);
1975 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1976 * can find pages to build into rpcs quickly */
1977 void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1979 if (lop_makes_hprpc(&loi->loi_write_lop) ||
1980 lop_makes_hprpc(&loi->loi_read_lop)) {
1982 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
1983 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
1985 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
1986 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
1987 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
1988 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1991 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1992 loi->loi_write_lop.lop_num_pending);
1994 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1995 loi->loi_read_lop.lop_num_pending);
1998 static void lop_update_pending(struct client_obd *cli,
1999 struct loi_oap_pages *lop, int cmd, int delta)
2001 lop->lop_num_pending += delta;
2002 if (cmd & OBD_BRW_WRITE)
2003 cli->cl_pending_w_pages += delta;
2005 cli->cl_pending_r_pages += delta;
2009 * this is called when a sync waiter receives an interruption. Its job is to
2010 * get the caller woken as soon as possible. If its page hasn't been put in an
2011 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
2012 * desiring interruption which will forcefully complete the rpc once the rpc
2015 int osc_oap_interrupted(const struct lu_env *env, struct osc_async_page *oap)
2017 struct loi_oap_pages *lop;
2018 struct lov_oinfo *loi;
2022 LASSERT(!oap->oap_interrupted);
2023 oap->oap_interrupted = 1;
2025 /* ok, it's been put in an rpc. only one oap gets a request reference */
2026 if (oap->oap_request != NULL) {
2027 ptlrpc_mark_interrupted(oap->oap_request);
2028 ptlrpcd_wake(oap->oap_request);
2029 ptlrpc_req_finished(oap->oap_request);
2030 oap->oap_request = NULL;
2034 * page completion may be called only if ->cpo_prep() method was
2035 * executed by osc_io_submit(), that also adds page the to pending list
2037 if (!list_empty(&oap->oap_pending_item)) {
2038 list_del_init(&oap->oap_pending_item);
2039 list_del_init(&oap->oap_urgent_item);
2042 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
2043 &loi->loi_write_lop : &loi->loi_read_lop;
2044 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
2045 loi_list_maint(oap->oap_cli, oap->oap_loi);
2046 rc = oap->oap_caller_ops->ap_completion(env,
2047 oap->oap_caller_data,
2048 oap->oap_cmd, NULL, -EINTR);
2054 /* this is trying to propogate async writeback errors back up to the
2055 * application. As an async write fails we record the error code for later if
2056 * the app does an fsync. As long as errors persist we force future rpcs to be
2057 * sync so that the app can get a sync error and break the cycle of queueing
2058 * pages for which writeback will fail. */
2059 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
2066 ar->ar_force_sync = 1;
2067 ar->ar_min_xid = ptlrpc_sample_next_xid();
2072 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
2073 ar->ar_force_sync = 0;
2076 void osc_oap_to_pending(struct osc_async_page *oap)
2078 struct loi_oap_pages *lop;
2080 if (oap->oap_cmd & OBD_BRW_WRITE)
2081 lop = &oap->oap_loi->loi_write_lop;
2083 lop = &oap->oap_loi->loi_read_lop;
2085 if (oap->oap_async_flags & ASYNC_HP)
2086 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2087 else if (oap->oap_async_flags & ASYNC_URGENT)
2088 list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2089 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
2090 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
2093 /* this must be called holding the loi list lock to give coverage to exit_cache,
2094 * async_flag maintenance, and oap_request */
2095 static void osc_ap_completion(const struct lu_env *env,
2096 struct client_obd *cli, struct obdo *oa,
2097 struct osc_async_page *oap, int sent, int rc)
2102 if (oap->oap_request != NULL) {
2103 xid = ptlrpc_req_xid(oap->oap_request);
2104 ptlrpc_req_finished(oap->oap_request);
2105 oap->oap_request = NULL;
2108 spin_lock(&oap->oap_lock);
2109 oap->oap_async_flags = 0;
2110 spin_unlock(&oap->oap_lock);
2111 oap->oap_interrupted = 0;
2113 if (oap->oap_cmd & OBD_BRW_WRITE) {
2114 osc_process_ar(&cli->cl_ar, xid, rc);
2115 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2118 if (rc == 0 && oa != NULL) {
2119 if (oa->o_valid & OBD_MD_FLBLOCKS)
2120 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2121 if (oa->o_valid & OBD_MD_FLMTIME)
2122 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2123 if (oa->o_valid & OBD_MD_FLATIME)
2124 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2125 if (oa->o_valid & OBD_MD_FLCTIME)
2126 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2129 rc = oap->oap_caller_ops->ap_completion(env, oap->oap_caller_data,
2130 oap->oap_cmd, oa, rc);
2132 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2133 * I/O on the page could start, but OSC calls it under lock
2134 * and thus we can add oap back to pending safely */
2136 /* upper layer wants to leave the page on pending queue */
2137 osc_oap_to_pending(oap);
2139 osc_exit_cache(cli, oap, sent);
2143 static int brw_interpret(const struct lu_env *env,
2144 struct ptlrpc_request *req, void *data, int rc)
2146 struct osc_brw_async_args *aa = data;
2147 struct client_obd *cli;
2151 rc = osc_brw_fini_request(req, rc);
2152 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2153 if (osc_recoverable_error(rc)) {
2154 rc = osc_brw_redo_request(req, aa);
2160 capa_put(aa->aa_ocapa);
2161 aa->aa_ocapa = NULL;
2166 client_obd_list_lock(&cli->cl_loi_list_lock);
2168 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2169 * is called so we know whether to go to sync BRWs or wait for more
2170 * RPCs to complete */
2171 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2172 cli->cl_w_in_flight--;
2174 cli->cl_r_in_flight--;
2176 async = list_empty(&aa->aa_oaps);
2177 if (!async) { /* from osc_send_oap_rpc() */
2178 struct osc_async_page *oap, *tmp;
2179 /* the caller may re-use the oap after the completion call so
2180 * we need to clean it up a little */
2181 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
2182 list_del_init(&oap->oap_rpc_item);
2183 osc_ap_completion(env, cli, aa->aa_oa, oap, 1, rc);
2185 OBDO_FREE(aa->aa_oa);
2186 } else { /* from async_internal() */
2188 for (i = 0; i < aa->aa_page_count; i++)
2189 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2191 if (aa->aa_oa->o_flags & OBD_FL_TEMPORARY)
2192 OBDO_FREE(aa->aa_oa);
2194 osc_wake_cache_waiters(cli);
2195 osc_check_rpcs(env, cli);
2196 client_obd_list_unlock(&cli->cl_loi_list_lock);
2198 cl_req_completion(env, aa->aa_clerq, rc);
2199 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2203 static struct ptlrpc_request *osc_build_req(const struct lu_env *env,
2204 struct client_obd *cli,
2205 struct list_head *rpc_list,
2206 int page_count, int cmd)
2208 struct ptlrpc_request *req;
2209 struct brw_page **pga = NULL;
2210 struct osc_brw_async_args *aa;
2211 struct obdo *oa = NULL;
2212 const struct obd_async_page_ops *ops = NULL;
2213 void *caller_data = NULL;
2214 struct osc_async_page *oap;
2215 struct osc_async_page *tmp;
2216 struct ost_body *body;
2217 struct cl_req *clerq = NULL;
2218 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
2219 struct ldlm_lock *lock = NULL;
2220 struct cl_req_attr crattr;
2224 LASSERT(!list_empty(rpc_list));
2226 memset(&crattr, 0, sizeof crattr);
2227 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2229 GOTO(out, req = ERR_PTR(-ENOMEM));
2233 GOTO(out, req = ERR_PTR(-ENOMEM));
2236 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2237 struct cl_page *page = osc_oap2cl_page(oap);
2239 ops = oap->oap_caller_ops;
2240 caller_data = oap->oap_caller_data;
2242 clerq = cl_req_alloc(env, page, crt,
2243 1 /* only 1-object rpcs for
2246 GOTO(out, req = (void *)clerq);
2247 lock = oap->oap_ldlm_lock;
2249 pga[i] = &oap->oap_brw_page;
2250 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2251 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2252 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2254 cl_req_page_add(env, clerq, page);
2257 /* always get the data for the obdo for the rpc */
2258 LASSERT(ops != NULL);
2260 crattr.cra_capa = NULL;
2261 cl_req_attr_set(env, clerq, &crattr, ~0ULL);
2263 oa->o_handle = lock->l_remote_handle;
2264 oa->o_valid |= OBD_MD_FLHANDLE;
2267 rc = cl_req_prep(env, clerq);
2269 CERROR("cl_req_prep failed: %d\n", rc);
2270 GOTO(out, req = ERR_PTR(rc));
2273 sort_brw_pages(pga, page_count);
2274 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2275 pga, &req, crattr.cra_capa, 1);
2277 CERROR("prep_req failed: %d\n", rc);
2278 GOTO(out, req = ERR_PTR(rc));
2281 /* Need to update the timestamps after the request is built in case
2282 * we race with setattr (locally or in queue at OST). If OST gets
2283 * later setattr before earlier BRW (as determined by the request xid),
2284 * the OST will not use BRW timestamps. Sadly, there is no obvious
2285 * way to do this in a single call. bug 10150 */
2286 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
2287 cl_req_attr_set(env, clerq, &crattr,
2288 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2290 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2291 aa = ptlrpc_req_async_args(req);
2292 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2293 list_splice(rpc_list, &aa->aa_oaps);
2294 CFS_INIT_LIST_HEAD(rpc_list);
2295 aa->aa_clerq = clerq;
2297 capa_put(crattr.cra_capa);
2302 OBD_FREE(pga, sizeof(*pga) * page_count);
2303 /* this should happen rarely and is pretty bad, it makes the
2304 * pending list not follow the dirty order */
2305 client_obd_list_lock(&cli->cl_loi_list_lock);
2306 list_for_each_entry_safe(oap, tmp, rpc_list, oap_rpc_item) {
2307 list_del_init(&oap->oap_rpc_item);
2309 /* queued sync pages can be torn down while the pages
2310 * were between the pending list and the rpc */
2311 if (oap->oap_interrupted) {
2312 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2313 osc_ap_completion(env, cli, NULL, oap, 0,
2317 osc_ap_completion(env, cli, NULL, oap, 0, PTR_ERR(req));
2319 if (clerq && !IS_ERR(clerq))
2320 cl_req_completion(env, clerq, PTR_ERR(req));
2326 * prepare pages for ASYNC io and put pages in send queue.
2328 * \param cmd OBD_BRW_* macroses
2329 * \param lop pending pages
2331 * \return zero if pages successfully add to send queue.
2332 * \return not zere if error occurring.
2335 osc_send_oap_rpc(const struct lu_env *env, struct client_obd *cli,
2336 struct lov_oinfo *loi,
2337 int cmd, struct loi_oap_pages *lop)
2339 struct ptlrpc_request *req;
2340 obd_count page_count = 0;
2341 struct osc_async_page *oap = NULL, *tmp;
2342 struct osc_brw_async_args *aa;
2343 const struct obd_async_page_ops *ops;
2344 CFS_LIST_HEAD(rpc_list);
2345 CFS_LIST_HEAD(tmp_list);
2346 unsigned int ending_offset;
2347 unsigned starting_offset = 0;
2349 struct cl_object *clob = NULL;
2352 /* ASYNC_HP pages first. At present, when the lock the pages is
2353 * to be canceled, the pages covered by the lock will be sent out
2354 * with ASYNC_HP. We have to send out them as soon as possible. */
2355 list_for_each_entry_safe(oap, tmp, &lop->lop_urgent, oap_urgent_item) {
2356 if (oap->oap_async_flags & ASYNC_HP)
2357 list_move(&oap->oap_pending_item, &tmp_list);
2359 list_move_tail(&oap->oap_pending_item, &tmp_list);
2360 if (++page_count >= cli->cl_max_pages_per_rpc)
2364 list_splice(&tmp_list, &lop->lop_pending);
2367 /* first we find the pages we're allowed to work with */
2368 list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2370 ops = oap->oap_caller_ops;
2372 LASSERTF(oap->oap_magic == OAP_MAGIC, "Bad oap magic: oap %p, "
2373 "magic 0x%x\n", oap, oap->oap_magic);
2376 /* pin object in memory, so that completion call-backs
2377 * can be safely called under client_obd_list lock. */
2378 clob = osc_oap2cl_page(oap)->cp_obj;
2379 cl_object_get(clob);
2382 if (page_count != 0 &&
2383 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2384 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2385 " oap %p, page %p, srvlock %u\n",
2386 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2390 /* If there is a gap at the start of this page, it can't merge
2391 * with any previous page, so we'll hand the network a
2392 * "fragmented" page array that it can't transfer in 1 RDMA */
2393 if (page_count != 0 && oap->oap_page_off != 0)
2396 /* in llite being 'ready' equates to the page being locked
2397 * until completion unlocks it. commit_write submits a page
2398 * as not ready because its unlock will happen unconditionally
2399 * as the call returns. if we race with commit_write giving
2400 * us that page we dont' want to create a hole in the page
2401 * stream, so we stop and leave the rpc to be fired by
2402 * another dirtier or kupdated interval (the not ready page
2403 * will still be on the dirty list). we could call in
2404 * at the end of ll_file_write to process the queue again. */
2405 if (!(oap->oap_async_flags & ASYNC_READY)) {
2406 int rc = ops->ap_make_ready(env, oap->oap_caller_data,
2409 CDEBUG(D_INODE, "oap %p page %p returned %d "
2410 "instead of ready\n", oap,
2414 /* llite is telling us that the page is still
2415 * in commit_write and that we should try
2416 * and put it in an rpc again later. we
2417 * break out of the loop so we don't create
2418 * a hole in the sequence of pages in the rpc
2423 /* the io isn't needed.. tell the checks
2424 * below to complete the rpc with EINTR */
2425 spin_lock(&oap->oap_lock);
2426 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2427 spin_unlock(&oap->oap_lock);
2428 oap->oap_count = -EINTR;
2431 spin_lock(&oap->oap_lock);
2432 oap->oap_async_flags |= ASYNC_READY;
2433 spin_unlock(&oap->oap_lock);
2436 LASSERTF(0, "oap %p page %p returned %d "
2437 "from make_ready\n", oap,
2445 * Page submitted for IO has to be locked. Either by
2446 * ->ap_make_ready() or by higher layers.
2448 #if defined(__KERNEL__) && defined(__linux__)
2450 struct cl_page *page;
2452 page = osc_oap2cl_page(oap);
2454 if (page->cp_type == CPT_CACHEABLE &&
2455 !(PageLocked(oap->oap_page) &&
2456 (CheckWriteback(oap->oap_page, cmd)))) {
2457 CDEBUG(D_PAGE, "page %p lost wb %lx/%x\n",
2459 (long)oap->oap_page->flags,
2460 oap->oap_async_flags);
2466 /* take the page out of our book-keeping */
2467 list_del_init(&oap->oap_pending_item);
2468 lop_update_pending(cli, lop, cmd, -1);
2469 list_del_init(&oap->oap_urgent_item);
2471 if (page_count == 0)
2472 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2473 (PTLRPC_MAX_BRW_SIZE - 1);
2475 /* ask the caller for the size of the io as the rpc leaves. */
2476 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE)) {
2478 ops->ap_refresh_count(env, oap->oap_caller_data,
2480 LASSERT(oap->oap_page_off + oap->oap_count <= CFS_PAGE_SIZE);
2482 if (oap->oap_count <= 0) {
2483 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2485 osc_ap_completion(env, cli, NULL,
2486 oap, 0, oap->oap_count);
2490 /* now put the page back in our accounting */
2491 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2492 if (page_count == 0)
2493 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2494 if (++page_count >= cli->cl_max_pages_per_rpc)
2497 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2498 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2499 * have the same alignment as the initial writes that allocated
2500 * extents on the server. */
2501 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2502 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2503 if (ending_offset == 0)
2506 /* If there is a gap at the end of this page, it can't merge
2507 * with any subsequent pages, so we'll hand the network a
2508 * "fragmented" page array that it can't transfer in 1 RDMA */
2509 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2513 osc_wake_cache_waiters(cli);
2515 loi_list_maint(cli, loi);
2517 client_obd_list_unlock(&cli->cl_loi_list_lock);
2520 cl_object_put(env, clob);
2522 if (page_count == 0) {
2523 client_obd_list_lock(&cli->cl_loi_list_lock);
2527 req = osc_build_req(env, cli, &rpc_list, page_count, cmd);
2529 LASSERT(list_empty(&rpc_list));
2530 loi_list_maint(cli, loi);
2531 RETURN(PTR_ERR(req));
2534 aa = ptlrpc_req_async_args(req);
2536 if (cmd == OBD_BRW_READ) {
2537 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2538 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2539 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2540 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2542 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2543 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2544 cli->cl_w_in_flight);
2545 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2546 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2548 ptlrpc_lprocfs_brw(req, aa->aa_requested_nob);
2550 client_obd_list_lock(&cli->cl_loi_list_lock);
2552 if (cmd == OBD_BRW_READ)
2553 cli->cl_r_in_flight++;
2555 cli->cl_w_in_flight++;
2557 /* queued sync pages can be torn down while the pages
2558 * were between the pending list and the rpc */
2560 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2561 /* only one oap gets a request reference */
2564 if (oap->oap_interrupted && !req->rq_intr) {
2565 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2567 ptlrpc_mark_interrupted(req);
2571 tmp->oap_request = ptlrpc_request_addref(req);
2573 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2574 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2576 req->rq_interpret_reply = brw_interpret;
2577 ptlrpcd_add_req(req, PSCOPE_BRW);
2581 #define LOI_DEBUG(LOI, STR, args...) \
2582 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2583 !list_empty(&(LOI)->loi_ready_item) || \
2584 !list_empty(&(LOI)->loi_hp_ready_item), \
2585 (LOI)->loi_write_lop.lop_num_pending, \
2586 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2587 (LOI)->loi_read_lop.lop_num_pending, \
2588 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2591 /* This is called by osc_check_rpcs() to find which objects have pages that
2592 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2593 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2597 /* First return objects that have blocked locks so that they
2598 * will be flushed quickly and other clients can get the lock,
2599 * then objects which have pages ready to be stuffed into RPCs */
2600 if (!list_empty(&cli->cl_loi_hp_ready_list))
2601 RETURN(list_entry(cli->cl_loi_hp_ready_list.next,
2602 struct lov_oinfo, loi_hp_ready_item));
2603 if (!list_empty(&cli->cl_loi_ready_list))
2604 RETURN(list_entry(cli->cl_loi_ready_list.next,
2605 struct lov_oinfo, loi_ready_item));
2607 /* then if we have cache waiters, return all objects with queued
2608 * writes. This is especially important when many small files
2609 * have filled up the cache and not been fired into rpcs because
2610 * they don't pass the nr_pending/object threshhold */
2611 if (!list_empty(&cli->cl_cache_waiters) &&
2612 !list_empty(&cli->cl_loi_write_list))
2613 RETURN(list_entry(cli->cl_loi_write_list.next,
2614 struct lov_oinfo, loi_write_item));
2616 /* then return all queued objects when we have an invalid import
2617 * so that they get flushed */
2618 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2619 if (!list_empty(&cli->cl_loi_write_list))
2620 RETURN(list_entry(cli->cl_loi_write_list.next,
2621 struct lov_oinfo, loi_write_item));
2622 if (!list_empty(&cli->cl_loi_read_list))
2623 RETURN(list_entry(cli->cl_loi_read_list.next,
2624 struct lov_oinfo, loi_read_item));
2629 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2631 struct osc_async_page *oap;
2634 if (!list_empty(&loi->loi_write_lop.lop_urgent)) {
2635 oap = list_entry(loi->loi_write_lop.lop_urgent.next,
2636 struct osc_async_page, oap_urgent_item);
2637 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2640 if (!hprpc && !list_empty(&loi->loi_read_lop.lop_urgent)) {
2641 oap = list_entry(loi->loi_read_lop.lop_urgent.next,
2642 struct osc_async_page, oap_urgent_item);
2643 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2646 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2649 /* called with the loi list lock held */
2650 void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli)
2652 struct lov_oinfo *loi;
2653 int rc = 0, race_counter = 0;
2656 while ((loi = osc_next_loi(cli)) != NULL) {
2657 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2659 if (osc_max_rpc_in_flight(cli, loi))
2662 /* attempt some read/write balancing by alternating between
2663 * reads and writes in an object. The makes_rpc checks here
2664 * would be redundant if we were getting read/write work items
2665 * instead of objects. we don't want send_oap_rpc to drain a
2666 * partial read pending queue when we're given this object to
2667 * do io on writes while there are cache waiters */
2668 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2669 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_WRITE,
2670 &loi->loi_write_lop);
2672 CERROR("Write request failed with %d\n", rc);
2674 /* osc_send_oap_rpc failed, mostly because of
2677 * It can't break here, because if:
2678 * - a page was submitted by osc_io_submit, so
2680 * - no request in flight
2681 * - no subsequent request
2682 * The system will be in live-lock state,
2683 * because there is no chance to call
2684 * osc_io_unplug() and osc_check_rpcs() any
2685 * more. pdflush can't help in this case,
2686 * because it might be blocked at grabbing
2687 * the page lock as we mentioned.
2689 * Anyway, continue to drain pages. */
2698 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2699 rc = osc_send_oap_rpc(env, cli, loi, OBD_BRW_READ,
2700 &loi->loi_read_lop);
2702 CERROR("Read request failed with %d\n", rc);
2710 /* attempt some inter-object balancing by issueing rpcs
2711 * for each object in turn */
2712 if (!list_empty(&loi->loi_hp_ready_item))
2713 list_del_init(&loi->loi_hp_ready_item);
2714 if (!list_empty(&loi->loi_ready_item))
2715 list_del_init(&loi->loi_ready_item);
2716 if (!list_empty(&loi->loi_write_item))
2717 list_del_init(&loi->loi_write_item);
2718 if (!list_empty(&loi->loi_read_item))
2719 list_del_init(&loi->loi_read_item);
2721 loi_list_maint(cli, loi);
2723 /* send_oap_rpc fails with 0 when make_ready tells it to
2724 * back off. llite's make_ready does this when it tries
2725 * to lock a page queued for write that is already locked.
2726 * we want to try sending rpcs from many objects, but we
2727 * don't want to spin failing with 0. */
2728 if (race_counter == 10)
2734 /* we're trying to queue a page in the osc so we're subject to the
2735 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2736 * If the osc's queued pages are already at that limit, then we want to sleep
2737 * until there is space in the osc's queue for us. We also may be waiting for
2738 * write credits from the OST if there are RPCs in flight that may return some
2739 * before we fall back to sync writes.
2741 * We need this know our allocation was granted in the presence of signals */
2742 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2746 client_obd_list_lock(&cli->cl_loi_list_lock);
2747 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2748 client_obd_list_unlock(&cli->cl_loi_list_lock);
2753 * Non-blocking version of osc_enter_cache() that consumes grant only when it
2756 int osc_enter_cache_try(const struct lu_env *env,
2757 struct client_obd *cli, struct lov_oinfo *loi,
2758 struct osc_async_page *oap, int transient)
2762 has_grant = cli->cl_avail_grant >= CFS_PAGE_SIZE;
2764 osc_consume_write_grant(cli, &oap->oap_brw_page);
2766 cli->cl_dirty_transit += CFS_PAGE_SIZE;
2767 atomic_inc(&obd_dirty_transit_pages);
2768 oap->oap_brw_flags |= OBD_BRW_NOCACHE;
2774 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2775 * grant or cache space. */
2776 static int osc_enter_cache(const struct lu_env *env,
2777 struct client_obd *cli, struct lov_oinfo *loi,
2778 struct osc_async_page *oap)
2780 struct osc_cache_waiter ocw;
2781 struct l_wait_info lwi = { 0 };
2785 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2786 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2787 cli->cl_dirty_max, obd_max_dirty_pages,
2788 cli->cl_lost_grant, cli->cl_avail_grant);
2790 /* force the caller to try sync io. this can jump the list
2791 * of queued writes and create a discontiguous rpc stream */
2792 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2793 loi->loi_ar.ar_force_sync)
2796 /* Hopefully normal case - cache space and write credits available */
2797 if (cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max &&
2798 atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages &&
2799 osc_enter_cache_try(env, cli, loi, oap, 0))
2802 /* Make sure that there are write rpcs in flight to wait for. This
2803 * is a little silly as this object may not have any pending but
2804 * other objects sure might. */
2805 if (cli->cl_w_in_flight) {
2806 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2807 cfs_waitq_init(&ocw.ocw_waitq);
2811 loi_list_maint(cli, loi);
2812 osc_check_rpcs(env, cli);
2813 client_obd_list_unlock(&cli->cl_loi_list_lock);
2815 CDEBUG(D_CACHE, "sleeping for cache space\n");
2816 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2818 client_obd_list_lock(&cli->cl_loi_list_lock);
2819 if (!list_empty(&ocw.ocw_entry)) {
2820 list_del(&ocw.ocw_entry);
2830 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2831 struct lov_oinfo *loi, cfs_page_t *page,
2832 obd_off offset, const struct obd_async_page_ops *ops,
2833 void *data, void **res, int nocache,
2834 struct lustre_handle *lockh)
2836 struct osc_async_page *oap;
2841 return size_round(sizeof(*oap));
2844 oap->oap_magic = OAP_MAGIC;
2845 oap->oap_cli = &exp->exp_obd->u.cli;
2848 oap->oap_caller_ops = ops;
2849 oap->oap_caller_data = data;
2851 oap->oap_page = page;
2852 oap->oap_obj_off = offset;
2853 if (!client_is_remote(exp) &&
2854 cfs_capable(CFS_CAP_SYS_RESOURCE))
2855 oap->oap_brw_flags = OBD_BRW_NOQUOTA;
2857 LASSERT(!(offset & ~CFS_PAGE_MASK));
2859 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2860 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2861 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2862 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2864 spin_lock_init(&oap->oap_lock);
2865 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2869 struct osc_async_page *oap_from_cookie(void *cookie)
2871 struct osc_async_page *oap = cookie;
2872 if (oap->oap_magic != OAP_MAGIC)
2873 return ERR_PTR(-EINVAL);
2877 int osc_queue_async_io(const struct lu_env *env,
2878 struct obd_export *exp, struct lov_stripe_md *lsm,
2879 struct lov_oinfo *loi, void *cookie,
2880 int cmd, obd_off off, int count,
2881 obd_flag brw_flags, enum async_flags async_flags)
2883 struct client_obd *cli = &exp->exp_obd->u.cli;
2884 struct osc_async_page *oap;
2888 oap = oap_from_cookie(cookie);
2890 RETURN(PTR_ERR(oap));
2892 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2895 if (!list_empty(&oap->oap_pending_item) ||
2896 !list_empty(&oap->oap_urgent_item) ||
2897 !list_empty(&oap->oap_rpc_item))
2900 /* check if the file's owner/group is over quota */
2901 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)) {
2902 struct cl_object *obj;
2903 struct cl_attr attr; /* XXX put attr into thread info */
2904 unsigned int qid[MAXQUOTAS];
2906 obj = cl_object_top(osc_oap2cl_page(oap)->cp_obj);
2908 cl_object_attr_lock(obj);
2909 rc = cl_object_attr_get(env, obj, &attr);
2910 cl_object_attr_unlock(obj);
2912 qid[USRQUOTA] = attr.cat_uid;
2913 qid[GRPQUOTA] = attr.cat_gid;
2915 lquota_chkdq(quota_interface, cli, qid) == NO_QUOTA)
2922 loi = lsm->lsm_oinfo[0];
2924 client_obd_list_lock(&cli->cl_loi_list_lock);
2926 LASSERT(off + count <= CFS_PAGE_SIZE);
2928 oap->oap_page_off = off;
2929 oap->oap_count = count;
2930 oap->oap_brw_flags = brw_flags;
2931 /* Give a hint to OST that requests are coming from kswapd - bug19529 */
2932 if (libcfs_memory_pressure_get())
2933 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2934 spin_lock(&oap->oap_lock);
2935 oap->oap_async_flags = async_flags;
2936 spin_unlock(&oap->oap_lock);
2938 if (cmd & OBD_BRW_WRITE) {
2939 rc = osc_enter_cache(env, cli, loi, oap);
2941 client_obd_list_unlock(&cli->cl_loi_list_lock);
2946 osc_oap_to_pending(oap);
2947 loi_list_maint(cli, loi);
2949 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2952 osc_check_rpcs(env, cli);
2953 client_obd_list_unlock(&cli->cl_loi_list_lock);
2958 /* aka (~was & now & flag), but this is more clear :) */
2959 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2961 int osc_set_async_flags_base(struct client_obd *cli,
2962 struct lov_oinfo *loi, struct osc_async_page *oap,
2963 obd_flag async_flags)
2965 struct loi_oap_pages *lop;
2969 LASSERT(!list_empty(&oap->oap_pending_item));
2971 if (oap->oap_cmd & OBD_BRW_WRITE) {
2972 lop = &loi->loi_write_lop;
2974 lop = &loi->loi_read_lop;
2977 if ((oap->oap_async_flags & async_flags) == async_flags)
2980 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2981 flags |= ASYNC_READY;
2983 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
2984 list_empty(&oap->oap_rpc_item)) {
2985 if (oap->oap_async_flags & ASYNC_HP)
2986 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2988 list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2989 flags |= ASYNC_URGENT;
2990 loi_list_maint(cli, loi);
2992 spin_lock(&oap->oap_lock);
2993 oap->oap_async_flags |= flags;
2994 spin_unlock(&oap->oap_lock);
2996 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2997 oap->oap_async_flags);
3001 int osc_teardown_async_page(struct obd_export *exp,
3002 struct lov_stripe_md *lsm,
3003 struct lov_oinfo *loi, void *cookie)
3005 struct client_obd *cli = &exp->exp_obd->u.cli;
3006 struct loi_oap_pages *lop;
3007 struct osc_async_page *oap;
3011 oap = oap_from_cookie(cookie);
3013 RETURN(PTR_ERR(oap));
3016 loi = lsm->lsm_oinfo[0];
3018 if (oap->oap_cmd & OBD_BRW_WRITE) {
3019 lop = &loi->loi_write_lop;
3021 lop = &loi->loi_read_lop;
3024 client_obd_list_lock(&cli->cl_loi_list_lock);
3026 if (!list_empty(&oap->oap_rpc_item))
3027 GOTO(out, rc = -EBUSY);
3029 osc_exit_cache(cli, oap, 0);
3030 osc_wake_cache_waiters(cli);
3032 if (!list_empty(&oap->oap_urgent_item)) {
3033 list_del_init(&oap->oap_urgent_item);
3034 spin_lock(&oap->oap_lock);
3035 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
3036 spin_unlock(&oap->oap_lock);
3038 if (!list_empty(&oap->oap_pending_item)) {
3039 list_del_init(&oap->oap_pending_item);
3040 lop_update_pending(cli, lop, oap->oap_cmd, -1);
3042 loi_list_maint(cli, loi);
3043 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
3045 client_obd_list_unlock(&cli->cl_loi_list_lock);
3049 static void osc_set_lock_data_with_check(struct ldlm_lock *lock,
3050 struct ldlm_enqueue_info *einfo,
3053 void *data = einfo->ei_cbdata;
3055 LASSERT(lock != NULL);
3056 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
3057 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
3058 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
3059 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
3061 lock_res_and_lock(lock);
3062 spin_lock(&osc_ast_guard);
3063 LASSERT(lock->l_ast_data == NULL || lock->l_ast_data == data);
3064 lock->l_ast_data = data;
3065 spin_unlock(&osc_ast_guard);
3066 unlock_res_and_lock(lock);
3069 static void osc_set_data_with_check(struct lustre_handle *lockh,
3070 struct ldlm_enqueue_info *einfo,
3073 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
3076 osc_set_lock_data_with_check(lock, einfo, flags);
3077 LDLM_LOCK_PUT(lock);
3079 CERROR("lockh %p, data %p - client evicted?\n",
3080 lockh, einfo->ei_cbdata);
3083 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3084 ldlm_iterator_t replace, void *data)
3086 struct ldlm_res_id res_id;
3087 struct obd_device *obd = class_exp2obd(exp);
3089 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_gr, &res_id);
3090 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3094 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
3095 obd_enqueue_update_f upcall, void *cookie,
3098 int intent = *flags & LDLM_FL_HAS_INTENT;
3102 /* The request was created before ldlm_cli_enqueue call. */
3103 if (rc == ELDLM_LOCK_ABORTED) {
3104 struct ldlm_reply *rep;
3105 rep = req_capsule_server_get(&req->rq_pill,
3108 LASSERT(rep != NULL);
3109 if (rep->lock_policy_res1)
3110 rc = rep->lock_policy_res1;
3114 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3115 *flags |= LDLM_FL_LVB_READY;
3116 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3117 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
3120 /* Call the update callback. */
3121 rc = (*upcall)(cookie, rc);
3125 static int osc_enqueue_interpret(const struct lu_env *env,
3126 struct ptlrpc_request *req,
3127 struct osc_enqueue_args *aa, int rc)
3129 struct ldlm_lock *lock;
3130 struct lustre_handle handle;
3133 /* Make a local copy of a lock handle and a mode, because aa->oa_*
3134 * might be freed anytime after lock upcall has been called. */
3135 lustre_handle_copy(&handle, aa->oa_lockh);
3136 mode = aa->oa_ei->ei_mode;
3138 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3140 lock = ldlm_handle2lock(&handle);
3142 /* Take an additional reference so that a blocking AST that
3143 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
3144 * to arrive after an upcall has been executed by
3145 * osc_enqueue_fini(). */
3146 ldlm_lock_addref(&handle, mode);
3148 /* Complete obtaining the lock procedure. */
3149 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3150 mode, aa->oa_flags, aa->oa_lvb,
3151 sizeof(*aa->oa_lvb), lustre_swab_ost_lvb,
3153 /* Complete osc stuff. */
3154 rc = osc_enqueue_fini(req, aa->oa_lvb,
3155 aa->oa_upcall, aa->oa_cookie, aa->oa_flags, rc);
3157 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
3159 /* Release the lock for async request. */
3160 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
3162 * Releases a reference taken by ldlm_cli_enqueue(), if it is
3163 * not already released by
3164 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
3166 ldlm_lock_decref(&handle, mode);
3168 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3169 aa->oa_lockh, req, aa);
3170 ldlm_lock_decref(&handle, mode);
3171 LDLM_LOCK_PUT(lock);
3175 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
3176 struct lov_oinfo *loi, int flags,
3177 struct ost_lvb *lvb, __u32 mode, int rc)
3179 if (rc == ELDLM_OK) {
3180 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
3183 LASSERT(lock != NULL);
3184 loi->loi_lvb = *lvb;
3185 tmp = loi->loi_lvb.lvb_size;
3186 /* Extend KMS up to the end of this lock and no further
3187 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
3188 if (tmp > lock->l_policy_data.l_extent.end)
3189 tmp = lock->l_policy_data.l_extent.end + 1;
3190 if (tmp >= loi->loi_kms) {
3191 LDLM_DEBUG(lock, "lock acquired, setting rss="LPU64
3192 ", kms="LPU64, loi->loi_lvb.lvb_size, tmp);
3193 loi_kms_set(loi, tmp);
3195 LDLM_DEBUG(lock, "lock acquired, setting rss="
3196 LPU64"; leaving kms="LPU64", end="LPU64,
3197 loi->loi_lvb.lvb_size, loi->loi_kms,
3198 lock->l_policy_data.l_extent.end);
3200 ldlm_lock_allow_match(lock);
3201 LDLM_LOCK_PUT(lock);
3202 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
3203 loi->loi_lvb = *lvb;
3204 CDEBUG(D_INODE, "glimpsed, setting rss="LPU64"; leaving"
3205 " kms="LPU64"\n", loi->loi_lvb.lvb_size, loi->loi_kms);
3209 EXPORT_SYMBOL(osc_update_enqueue);
3211 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
3213 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3214 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3215 * other synchronous requests, however keeping some locks and trying to obtain
3216 * others may take a considerable amount of time in a case of ost failure; and
3217 * when other sync requests do not get released lock from a client, the client
3218 * is excluded from the cluster -- such scenarious make the life difficult, so
3219 * release locks just after they are obtained. */
3220 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3221 int *flags, ldlm_policy_data_t *policy,
3222 struct ost_lvb *lvb, int kms_valid,
3223 obd_enqueue_update_f upcall, void *cookie,
3224 struct ldlm_enqueue_info *einfo,
3225 struct lustre_handle *lockh,
3226 struct ptlrpc_request_set *rqset, int async)
3228 struct obd_device *obd = exp->exp_obd;
3229 struct ptlrpc_request *req = NULL;
3230 int intent = *flags & LDLM_FL_HAS_INTENT;
3235 /* Filesystem lock extents are extended to page boundaries so that
3236 * dealing with the page cache is a little smoother. */
3237 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3238 policy->l_extent.end |= ~CFS_PAGE_MASK;
3241 * kms is not valid when either object is completely fresh (so that no
3242 * locks are cached), or object was evicted. In the latter case cached
3243 * lock cannot be used, because it would prime inode state with
3244 * potentially stale LVB.
3249 /* Next, search for already existing extent locks that will cover us */
3250 /* If we're trying to read, we also search for an existing PW lock. The
3251 * VFS and page cache already protect us locally, so lots of readers/
3252 * writers can share a single PW lock.
3254 * There are problems with conversion deadlocks, so instead of
3255 * converting a read lock to a write lock, we'll just enqueue a new
3258 * At some point we should cancel the read lock instead of making them
3259 * send us a blocking callback, but there are problems with canceling
3260 * locks out from other users right now, too. */
3261 mode = einfo->ei_mode;
3262 if (einfo->ei_mode == LCK_PR)
3264 mode = ldlm_lock_match(obd->obd_namespace,
3265 *flags | LDLM_FL_LVB_READY, res_id,
3266 einfo->ei_type, policy, mode, lockh, 0);
3268 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
3270 if (matched->l_ast_data == NULL ||
3271 matched->l_ast_data == einfo->ei_cbdata) {
3272 /* addref the lock only if not async requests and PW
3273 * lock is matched whereas we asked for PR. */
3274 if (!rqset && einfo->ei_mode != mode)
3275 ldlm_lock_addref(lockh, LCK_PR);
3276 osc_set_lock_data_with_check(matched, einfo, *flags);
3278 /* I would like to be able to ASSERT here that
3279 * rss <= kms, but I can't, for reasons which
3280 * are explained in lov_enqueue() */
3283 /* We already have a lock, and it's referenced */
3284 (*upcall)(cookie, ELDLM_OK);
3286 /* For async requests, decref the lock. */
3287 if (einfo->ei_mode != mode)
3288 ldlm_lock_decref(lockh, LCK_PW);
3290 ldlm_lock_decref(lockh, einfo->ei_mode);
3291 LDLM_LOCK_PUT(matched);
3294 ldlm_lock_decref(lockh, mode);
3295 LDLM_LOCK_PUT(matched);
3300 CFS_LIST_HEAD(cancels);
3301 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3302 &RQF_LDLM_ENQUEUE_LVB);
3306 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3310 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3312 ptlrpc_request_set_replen(req);
3315 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3316 *flags &= ~LDLM_FL_BLOCK_GRANTED;
3318 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
3319 sizeof(*lvb), lustre_swab_ost_lvb, lockh, async);
3322 struct osc_enqueue_args *aa;
3323 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3324 aa = ptlrpc_req_async_args(req);
3327 aa->oa_flags = flags;
3328 aa->oa_upcall = upcall;
3329 aa->oa_cookie = cookie;
3331 aa->oa_lockh = lockh;
3333 req->rq_interpret_reply =
3334 (ptlrpc_interpterer_t)osc_enqueue_interpret;
3335 if (rqset == PTLRPCD_SET)
3336 ptlrpcd_add_req(req, PSCOPE_OTHER);
3338 ptlrpc_set_add_req(rqset, req);
3339 } else if (intent) {
3340 ptlrpc_req_finished(req);
3345 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, rc);
3347 ptlrpc_req_finished(req);
3352 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3353 struct ldlm_enqueue_info *einfo,
3354 struct ptlrpc_request_set *rqset)
3356 struct ldlm_res_id res_id;
3360 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3361 oinfo->oi_md->lsm_object_gr, &res_id);
3363 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
3364 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3365 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
3366 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
3367 rqset, rqset != NULL);
3371 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
3372 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3373 int *flags, void *data, struct lustre_handle *lockh,
3376 struct obd_device *obd = exp->exp_obd;
3377 int lflags = *flags;
3381 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3384 /* Filesystem lock extents are extended to page boundaries so that
3385 * dealing with the page cache is a little smoother */
3386 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3387 policy->l_extent.end |= ~CFS_PAGE_MASK;
3389 /* Next, search for already existing extent locks that will cover us */
3390 /* If we're trying to read, we also search for an existing PW lock. The
3391 * VFS and page cache already protect us locally, so lots of readers/
3392 * writers can share a single PW lock. */
3396 rc = ldlm_lock_match(obd->obd_namespace, lflags,
3397 res_id, type, policy, rc, lockh, unref);
3400 osc_set_data_with_check(lockh, data, lflags);
3401 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3402 ldlm_lock_addref(lockh, LCK_PR);
3403 ldlm_lock_decref(lockh, LCK_PW);
3410 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
3414 if (unlikely(mode == LCK_GROUP))
3415 ldlm_lock_decref_and_cancel(lockh, mode);
3417 ldlm_lock_decref(lockh, mode);
3422 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3423 __u32 mode, struct lustre_handle *lockh)
3426 RETURN(osc_cancel_base(lockh, mode));
3429 static int osc_cancel_unused(struct obd_export *exp,
3430 struct lov_stripe_md *lsm, int flags,
3433 struct obd_device *obd = class_exp2obd(exp);
3434 struct ldlm_res_id res_id, *resp = NULL;
3437 resp = osc_build_res_name(lsm->lsm_object_id,
3438 lsm->lsm_object_gr, &res_id);
3441 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3444 static int osc_statfs_interpret(const struct lu_env *env,
3445 struct ptlrpc_request *req,
3446 struct osc_async_args *aa, int rc)
3448 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
3449 struct obd_statfs *msfs;
3453 /* The request has in fact never been sent
3454 * due to issues at a higher level (LOV).
3455 * Exit immediately since the caller is
3456 * aware of the problem and takes care
3457 * of the clean up */
3460 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
3461 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
3467 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3469 GOTO(out, rc = -EPROTO);
3472 /* Reinitialize the RDONLY and DEGRADED flags at the client
3473 * on each statfs, so they don't stay set permanently. */
3474 spin_lock(&cli->cl_oscc.oscc_lock);
3475 cli->cl_oscc.oscc_flags &= ~(OSCC_FLAG_RDONLY | OSCC_FLAG_DEGRADED);
3476 if (msfs->os_state & OS_STATE_DEGRADED)
3477 cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
3479 if (msfs->os_state & OS_STATE_READONLY)
3480 cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
3481 spin_unlock(&cli->cl_oscc.oscc_lock);
3483 *aa->aa_oi->oi_osfs = *msfs;
3485 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3489 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3490 __u64 max_age, struct ptlrpc_request_set *rqset)
3492 struct ptlrpc_request *req;
3493 struct osc_async_args *aa;
3497 /* We could possibly pass max_age in the request (as an absolute
3498 * timestamp or a "seconds.usec ago") so the target can avoid doing
3499 * extra calls into the filesystem if that isn't necessary (e.g.
3500 * during mount that would help a bit). Having relative timestamps
3501 * is not so great if request processing is slow, while absolute
3502 * timestamps are not ideal because they need time synchronization. */
3503 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3507 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3509 ptlrpc_request_free(req);
3512 ptlrpc_request_set_replen(req);
3513 req->rq_request_portal = OST_CREATE_PORTAL;
3514 ptlrpc_at_set_req_timeout(req);
3516 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3517 /* procfs requests not want stat in wait for avoid deadlock */
3518 req->rq_no_resend = 1;
3519 req->rq_no_delay = 1;
3522 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
3523 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3524 aa = ptlrpc_req_async_args(req);
3527 ptlrpc_set_add_req(rqset, req);
3531 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3532 __u64 max_age, __u32 flags)
3534 struct obd_statfs *msfs;
3535 struct ptlrpc_request *req;
3536 struct obd_import *imp = NULL;
3540 /*Since the request might also come from lprocfs, so we need
3541 *sync this with client_disconnect_export Bug15684*/
3542 down_read(&obd->u.cli.cl_sem);
3543 if (obd->u.cli.cl_import)
3544 imp = class_import_get(obd->u.cli.cl_import);
3545 up_read(&obd->u.cli.cl_sem);
3549 /* We could possibly pass max_age in the request (as an absolute
3550 * timestamp or a "seconds.usec ago") so the target can avoid doing
3551 * extra calls into the filesystem if that isn't necessary (e.g.
3552 * during mount that would help a bit). Having relative timestamps
3553 * is not so great if request processing is slow, while absolute
3554 * timestamps are not ideal because they need time synchronization. */
3555 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
3557 class_import_put(imp);
3562 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3564 ptlrpc_request_free(req);
3567 ptlrpc_request_set_replen(req);
3568 req->rq_request_portal = OST_CREATE_PORTAL;
3569 ptlrpc_at_set_req_timeout(req);
3571 if (flags & OBD_STATFS_NODELAY) {
3572 /* procfs requests not want stat in wait for avoid deadlock */
3573 req->rq_no_resend = 1;
3574 req->rq_no_delay = 1;
3577 rc = ptlrpc_queue_wait(req);
3581 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3583 GOTO(out, rc = -EPROTO);
3590 ptlrpc_req_finished(req);
3594 /* Retrieve object striping information.
3596 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3597 * the maximum number of OST indices which will fit in the user buffer.
3598 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3600 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3602 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3603 struct lov_user_md_v3 lum, *lumk;
3604 struct lov_user_ost_data_v1 *lmm_objects;
3605 int rc = 0, lum_size;
3611 /* we only need the header part from user space to get lmm_magic and
3612 * lmm_stripe_count, (the header part is common to v1 and v3) */
3613 lum_size = sizeof(struct lov_user_md_v1);
3614 if (copy_from_user(&lum, lump, lum_size))
3617 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3618 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3621 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3622 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3623 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3624 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3626 /* we can use lov_mds_md_size() to compute lum_size
3627 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3628 if (lum.lmm_stripe_count > 0) {
3629 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3630 OBD_ALLOC(lumk, lum_size);
3634 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3635 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3637 lmm_objects = &(lumk->lmm_objects[0]);
3638 lmm_objects->l_object_id = lsm->lsm_object_id;
3640 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3644 lumk->lmm_object_id = lsm->lsm_object_id;
3645 lumk->lmm_object_gr = lsm->lsm_object_gr;
3646 lumk->lmm_stripe_count = 1;
3648 if (copy_to_user(lump, lumk, lum_size))
3652 OBD_FREE(lumk, lum_size);
3658 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3659 void *karg, void *uarg)
3661 struct obd_device *obd = exp->exp_obd;
3662 struct obd_ioctl_data *data = karg;
3666 if (!try_module_get(THIS_MODULE)) {
3667 CERROR("Can't get module. Is it alive?");
3671 case OBD_IOC_LOV_GET_CONFIG: {
3673 struct lov_desc *desc;
3674 struct obd_uuid uuid;
3678 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3679 GOTO(out, err = -EINVAL);
3681 data = (struct obd_ioctl_data *)buf;
3683 if (sizeof(*desc) > data->ioc_inllen1) {
3684 obd_ioctl_freedata(buf, len);
3685 GOTO(out, err = -EINVAL);
3688 if (data->ioc_inllen2 < sizeof(uuid)) {
3689 obd_ioctl_freedata(buf, len);
3690 GOTO(out, err = -EINVAL);
3693 desc = (struct lov_desc *)data->ioc_inlbuf1;
3694 desc->ld_tgt_count = 1;
3695 desc->ld_active_tgt_count = 1;
3696 desc->ld_default_stripe_count = 1;
3697 desc->ld_default_stripe_size = 0;
3698 desc->ld_default_stripe_offset = 0;
3699 desc->ld_pattern = 0;
3700 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3702 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3704 err = copy_to_user((void *)uarg, buf, len);
3707 obd_ioctl_freedata(buf, len);
3710 case LL_IOC_LOV_SETSTRIPE:
3711 err = obd_alloc_memmd(exp, karg);
3715 case LL_IOC_LOV_GETSTRIPE:
3716 err = osc_getstripe(karg, uarg);
3718 case OBD_IOC_CLIENT_RECOVER:
3719 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3724 case IOC_OSC_SET_ACTIVE:
3725 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3728 case OBD_IOC_POLL_QUOTACHECK:
3729 err = lquota_poll_check(quota_interface, exp,
3730 (struct if_quotacheck *)karg);
3732 case OBD_IOC_PING_TARGET:
3733 err = ptlrpc_obd_ping(obd);
3736 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3737 cmd, cfs_curproc_comm());
3738 GOTO(out, err = -ENOTTY);
3741 module_put(THIS_MODULE);
3745 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3746 void *key, __u32 *vallen, void *val,
3747 struct lov_stripe_md *lsm)
3750 if (!vallen || !val)
3753 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3754 __u32 *stripe = val;
3755 *vallen = sizeof(*stripe);
3758 } else if (KEY_IS(KEY_LAST_ID)) {
3759 struct ptlrpc_request *req;
3764 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3765 &RQF_OST_GET_INFO_LAST_ID);
3769 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3770 RCL_CLIENT, keylen);
3771 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3773 ptlrpc_request_free(req);
3777 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3778 memcpy(tmp, key, keylen);
3780 req->rq_no_delay = req->rq_no_resend = 1;
3781 ptlrpc_request_set_replen(req);
3782 rc = ptlrpc_queue_wait(req);
3786 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3788 GOTO(out, rc = -EPROTO);
3790 *((obd_id *)val) = *reply;
3792 ptlrpc_req_finished(req);
3794 } else if (KEY_IS(KEY_FIEMAP)) {
3795 struct ptlrpc_request *req;
3796 struct ll_user_fiemap *reply;
3800 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3801 &RQF_OST_GET_INFO_FIEMAP);
3805 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3806 RCL_CLIENT, keylen);
3807 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3808 RCL_CLIENT, *vallen);
3809 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3810 RCL_SERVER, *vallen);
3812 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3814 ptlrpc_request_free(req);
3818 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3819 memcpy(tmp, key, keylen);
3820 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3821 memcpy(tmp, val, *vallen);
3823 ptlrpc_request_set_replen(req);
3824 rc = ptlrpc_queue_wait(req);
3828 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3830 GOTO(out1, rc = -EPROTO);
3832 memcpy(val, reply, *vallen);
3834 ptlrpc_req_finished(req);
3842 static int osc_setinfo_mds_connect_import(struct obd_import *imp)
3844 struct llog_ctxt *ctxt;
3848 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3850 rc = llog_initiator_connect(ctxt);
3851 llog_ctxt_put(ctxt);
3853 /* XXX return an error? skip setting below flags? */
3856 spin_lock(&imp->imp_lock);
3857 imp->imp_server_timeout = 1;
3858 imp->imp_pingable = 1;
3859 spin_unlock(&imp->imp_lock);
3860 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3865 static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
3866 struct ptlrpc_request *req,
3873 RETURN(osc_setinfo_mds_connect_import(req->rq_import));
3876 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3877 void *key, obd_count vallen, void *val,
3878 struct ptlrpc_request_set *set)
3880 struct ptlrpc_request *req;
3881 struct obd_device *obd = exp->exp_obd;
3882 struct obd_import *imp = class_exp2cliimp(exp);
3887 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3889 if (KEY_IS(KEY_NEXT_ID)) {
3890 if (vallen != sizeof(obd_id))
3894 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3895 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3896 exp->exp_obd->obd_name,
3897 obd->u.cli.cl_oscc.oscc_next_id);
3902 if (KEY_IS(KEY_UNLINKED)) {
3903 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3904 spin_lock(&oscc->oscc_lock);
3905 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3906 spin_unlock(&oscc->oscc_lock);
3910 if (KEY_IS(KEY_INIT_RECOV)) {
3911 if (vallen != sizeof(int))
3913 spin_lock(&imp->imp_lock);
3914 imp->imp_initial_recov = *(int *)val;
3915 spin_unlock(&imp->imp_lock);
3916 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3917 exp->exp_obd->obd_name,
3918 imp->imp_initial_recov);
3922 if (KEY_IS(KEY_CHECKSUM)) {
3923 if (vallen != sizeof(int))
3925 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3929 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3930 sptlrpc_conf_client_adapt(obd);
3934 if (KEY_IS(KEY_FLUSH_CTX)) {
3935 sptlrpc_import_flush_my_ctx(imp);
3939 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3942 /* We pass all other commands directly to OST. Since nobody calls osc
3943 methods directly and everybody is supposed to go through LOV, we
3944 assume lov checked invalid values for us.
3945 The only recognised values so far are evict_by_nid and mds_conn.
3946 Even if something bad goes through, we'd get a -EINVAL from OST
3949 if (KEY_IS(KEY_GRANT_SHRINK))
3950 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
3952 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
3957 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3958 RCL_CLIENT, keylen);
3959 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3960 RCL_CLIENT, vallen);
3961 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3963 ptlrpc_request_free(req);
3967 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3968 memcpy(tmp, key, keylen);
3969 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
3970 memcpy(tmp, val, vallen);
3972 if (KEY_IS(KEY_MDS_CONN)) {
3973 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3975 oscc->oscc_oa.o_gr = (*(__u32 *)val);
3976 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
3977 LASSERT_MDS_GROUP(oscc->oscc_oa.o_gr);
3978 req->rq_no_delay = req->rq_no_resend = 1;
3979 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3980 } else if (KEY_IS(KEY_GRANT_SHRINK)) {
3981 struct osc_grant_args *aa;
3984 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
3985 aa = ptlrpc_req_async_args(req);
3988 ptlrpc_req_finished(req);
3991 *oa = ((struct ost_body *)val)->oa;
3993 req->rq_interpret_reply = osc_shrink_grant_interpret;
3996 ptlrpc_request_set_replen(req);
3997 if (!KEY_IS(KEY_GRANT_SHRINK)) {
3998 LASSERT(set != NULL);
3999 ptlrpc_set_add_req(set, req);
4000 ptlrpc_check_set(NULL, set);
4002 ptlrpcd_add_req(req, PSCOPE_OTHER);
4008 static struct llog_operations osc_size_repl_logops = {
4009 lop_cancel: llog_obd_repl_cancel
4012 static struct llog_operations osc_mds_ost_orig_logops;
4014 static int __osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4015 struct obd_device *tgt, struct llog_catid *catid)
4020 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, 1,
4021 &catid->lci_logid, &osc_mds_ost_orig_logops);
4023 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
4027 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, 1,
4028 NULL, &osc_size_repl_logops);
4030 struct llog_ctxt *ctxt =
4031 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4034 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
4039 CERROR("osc '%s' tgt '%s' catid %p rc=%d\n",
4040 obd->obd_name, tgt->obd_name, catid, rc);
4041 CERROR("logid "LPX64":0x%x\n",
4042 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
4047 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
4048 struct obd_device *disk_obd, int *index)
4050 struct llog_catid catid;
4051 static char name[32] = CATLIST;
4055 LASSERT(olg == &obd->obd_olg);
4057 mutex_down(&olg->olg_cat_processing);
4058 rc = llog_get_cat_list(disk_obd, name, *index, 1, &catid);
4060 CERROR("rc: %d\n", rc);
4064 CDEBUG(D_INFO, "%s: Init llog for %d - catid "LPX64"/"LPX64":%x\n",
4065 obd->obd_name, *index, catid.lci_logid.lgl_oid,
4066 catid.lci_logid.lgl_ogr, catid.lci_logid.lgl_ogen);
4068 rc = __osc_llog_init(obd, olg, disk_obd, &catid);
4070 CERROR("rc: %d\n", rc);
4074 rc = llog_put_cat_list(disk_obd, name, *index, 1, &catid);
4076 CERROR("rc: %d\n", rc);
4081 mutex_up(&olg->olg_cat_processing);
4086 static int osc_llog_finish(struct obd_device *obd, int count)
4088 struct llog_ctxt *ctxt;
4089 int rc = 0, rc2 = 0;
4092 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
4094 rc = llog_cleanup(ctxt);
4096 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4098 rc2 = llog_cleanup(ctxt);
4105 static int osc_reconnect(const struct lu_env *env,
4106 struct obd_export *exp, struct obd_device *obd,
4107 struct obd_uuid *cluuid,
4108 struct obd_connect_data *data,
4111 struct client_obd *cli = &obd->u.cli;
4113 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
4116 client_obd_list_lock(&cli->cl_loi_list_lock);
4117 data->ocd_grant = cli->cl_avail_grant ?:
4118 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
4119 lost_grant = cli->cl_lost_grant;
4120 cli->cl_lost_grant = 0;
4121 client_obd_list_unlock(&cli->cl_loi_list_lock);
4123 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
4124 "cl_lost_grant: %ld\n", data->ocd_grant,
4125 cli->cl_avail_grant, lost_grant);
4126 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
4127 " ocd_grant: %d\n", data->ocd_connect_flags,
4128 data->ocd_version, data->ocd_grant);
4134 static int osc_disconnect(struct obd_export *exp)
4136 struct obd_device *obd = class_exp2obd(exp);
4137 struct llog_ctxt *ctxt;
4140 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
4142 if (obd->u.cli.cl_conn_count == 1) {
4143 /* Flush any remaining cancel messages out to the
4145 llog_sync(ctxt, exp);
4147 llog_ctxt_put(ctxt);
4149 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
4153 rc = client_disconnect_export(exp);
4155 * Initially we put del_shrink_grant before disconnect_export, but it
4156 * causes the following problem if setup (connect) and cleanup
4157 * (disconnect) are tangled together.
4158 * connect p1 disconnect p2
4159 * ptlrpc_connect_import
4160 * ............... class_manual_cleanup
4163 * ptlrpc_connect_interrupt
4165 * add this client to shrink list
4167 * Bang! pinger trigger the shrink.
4168 * So the osc should be disconnected from the shrink list, after we
4169 * are sure the import has been destroyed. BUG18662
4171 if (obd->u.cli.cl_import == NULL)
4172 osc_del_shrink_grant(&obd->u.cli);
4176 static int osc_import_event(struct obd_device *obd,
4177 struct obd_import *imp,
4178 enum obd_import_event event)
4180 struct client_obd *cli;
4184 LASSERT(imp->imp_obd == obd);
4187 case IMP_EVENT_DISCON: {
4188 /* Only do this on the MDS OSC's */
4189 if (imp->imp_server_timeout) {
4190 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4192 spin_lock(&oscc->oscc_lock);
4193 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
4194 spin_unlock(&oscc->oscc_lock);
4197 client_obd_list_lock(&cli->cl_loi_list_lock);
4198 cli->cl_avail_grant = 0;
4199 cli->cl_lost_grant = 0;
4200 client_obd_list_unlock(&cli->cl_loi_list_lock);
4203 case IMP_EVENT_INACTIVE: {
4204 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
4207 case IMP_EVENT_INVALIDATE: {
4208 struct ldlm_namespace *ns = obd->obd_namespace;
4212 env = cl_env_get(&refcheck);
4216 client_obd_list_lock(&cli->cl_loi_list_lock);
4217 /* all pages go to failing rpcs due to the invalid
4219 osc_check_rpcs(env, cli);
4220 client_obd_list_unlock(&cli->cl_loi_list_lock);
4222 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
4223 cl_env_put(env, &refcheck);
4228 case IMP_EVENT_ACTIVE: {
4229 /* Only do this on the MDS OSC's */
4230 if (imp->imp_server_timeout) {
4231 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4233 spin_lock(&oscc->oscc_lock);
4234 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
4235 spin_unlock(&oscc->oscc_lock);
4237 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
4240 case IMP_EVENT_OCD: {
4241 struct obd_connect_data *ocd = &imp->imp_connect_data;
4243 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
4244 osc_init_grant(&obd->u.cli, ocd);
4247 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
4248 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
4250 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
4254 CERROR("Unknown import event %d\n", event);
4260 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
4266 rc = ptlrpcd_addref();
4270 rc = client_obd_setup(obd, lcfg);
4274 struct lprocfs_static_vars lvars = { 0 };
4275 struct client_obd *cli = &obd->u.cli;
4277 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
4278 lprocfs_osc_init_vars(&lvars);
4279 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
4280 lproc_osc_attach_seqstat(obd);
4281 sptlrpc_lprocfs_cliobd_attach(obd);
4282 ptlrpc_lprocfs_register_obd(obd);
4286 /* We need to allocate a few requests more, because
4287 brw_interpret tries to create new requests before freeing
4288 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4289 reserved, but I afraid that might be too much wasted RAM
4290 in fact, so 2 is just my guess and still should work. */
4291 cli->cl_import->imp_rq_pool =
4292 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4294 ptlrpc_add_rqs_to_pool);
4296 CFS_INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
4297 sema_init(&cli->cl_grant_sem, 1);
4303 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4309 case OBD_CLEANUP_EARLY: {
4310 struct obd_import *imp;
4311 imp = obd->u.cli.cl_import;
4312 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4313 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4314 ptlrpc_deactivate_import(imp);
4315 spin_lock(&imp->imp_lock);
4316 imp->imp_pingable = 0;
4317 spin_unlock(&imp->imp_lock);
4320 case OBD_CLEANUP_EXPORTS: {
4321 /* If we set up but never connected, the
4322 client import will not have been cleaned. */
4323 if (obd->u.cli.cl_import) {
4324 struct obd_import *imp;
4325 down_write(&obd->u.cli.cl_sem);
4326 imp = obd->u.cli.cl_import;
4327 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4329 ptlrpc_invalidate_import(imp);
4330 if (imp->imp_rq_pool) {
4331 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4332 imp->imp_rq_pool = NULL;
4334 class_destroy_import(imp);
4335 up_write(&obd->u.cli.cl_sem);
4336 obd->u.cli.cl_import = NULL;
4338 rc = obd_llog_finish(obd, 0);
4340 CERROR("failed to cleanup llogging subsystems\n");
4347 int osc_cleanup(struct obd_device *obd)
4352 ptlrpc_lprocfs_unregister_obd(obd);
4353 lprocfs_obd_cleanup(obd);
4355 /* free memory of osc quota cache */
4356 lquota_cleanup(quota_interface, obd);
4358 rc = client_obd_cleanup(obd);
4364 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
4366 struct lprocfs_static_vars lvars = { 0 };
4369 lprocfs_osc_init_vars(&lvars);
4371 switch (lcfg->lcfg_command) {
4373 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4383 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4385 return osc_process_config_base(obd, buf);
4388 struct obd_ops osc_obd_ops = {
4389 .o_owner = THIS_MODULE,
4390 .o_setup = osc_setup,
4391 .o_precleanup = osc_precleanup,
4392 .o_cleanup = osc_cleanup,
4393 .o_add_conn = client_import_add_conn,
4394 .o_del_conn = client_import_del_conn,
4395 .o_connect = client_connect_import,
4396 .o_reconnect = osc_reconnect,
4397 .o_disconnect = osc_disconnect,
4398 .o_statfs = osc_statfs,
4399 .o_statfs_async = osc_statfs_async,
4400 .o_packmd = osc_packmd,
4401 .o_unpackmd = osc_unpackmd,
4402 .o_precreate = osc_precreate,
4403 .o_create = osc_create,
4404 .o_create_async = osc_create_async,
4405 .o_destroy = osc_destroy,
4406 .o_getattr = osc_getattr,
4407 .o_getattr_async = osc_getattr_async,
4408 .o_setattr = osc_setattr,
4409 .o_setattr_async = osc_setattr_async,
4411 .o_punch = osc_punch,
4413 .o_enqueue = osc_enqueue,
4414 .o_change_cbdata = osc_change_cbdata,
4415 .o_cancel = osc_cancel,
4416 .o_cancel_unused = osc_cancel_unused,
4417 .o_iocontrol = osc_iocontrol,
4418 .o_get_info = osc_get_info,
4419 .o_set_info_async = osc_set_info_async,
4420 .o_import_event = osc_import_event,
4421 .o_llog_init = osc_llog_init,
4422 .o_llog_finish = osc_llog_finish,
4423 .o_process_config = osc_process_config,
4426 extern struct lu_kmem_descr osc_caches[];
4427 extern spinlock_t osc_ast_guard;
4428 extern struct lock_class_key osc_ast_guard_class;
4430 int __init osc_init(void)
4432 struct lprocfs_static_vars lvars = { 0 };
4436 /* print an address of _any_ initialized kernel symbol from this
4437 * module, to allow debugging with gdb that doesn't support data
4438 * symbols from modules.*/
4439 CDEBUG(D_CONSOLE, "Lustre OSC module (%p).\n", &osc_caches);
4441 rc = lu_kmem_init(osc_caches);
4443 lprocfs_osc_init_vars(&lvars);
4445 request_module("lquota");
4446 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4447 lquota_init(quota_interface);
4448 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4450 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4451 LUSTRE_OSC_NAME, &osc_device_type);
4453 if (quota_interface)
4454 PORTAL_SYMBOL_PUT(osc_quota_interface);
4455 lu_kmem_fini(osc_caches);
4459 spin_lock_init(&osc_ast_guard);
4460 lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
4462 osc_mds_ost_orig_logops = llog_lvfs_ops;
4463 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
4464 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
4465 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
4466 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
4472 static void /*__exit*/ osc_exit(void)
4474 lu_device_type_fini(&osc_device_type);
4476 lquota_exit(quota_interface);
4477 if (quota_interface)
4478 PORTAL_SYMBOL_PUT(osc_quota_interface);
4480 class_unregister_type(LUSTRE_OSC_NAME);
4481 lu_kmem_fini(osc_caches);
4484 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4485 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4486 MODULE_LICENSE("GPL");
4488 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob