1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
5 * Author Peter Braam <braam@clusterfs.com>
7 * This file is part of the Lustre file system, http://www.lustre.org
8 * Lustre is a trademark of Cluster File Systems, Inc.
10 * You may have signed or agreed to another license before downloading
11 * this software. If so, you are bound by the terms and conditions
12 * of that agreement, and the following does not apply to you. See the
13 * LICENSE file included with this distribution for more information.
15 * If you did not agree to a different license, then this copy of Lustre
16 * is open source software; you can redistribute it and/or modify it
17 * under the terms of version 2 of the GNU General Public License as
18 * published by the Free Software Foundation.
20 * In either case, Lustre is distributed in the hope that it will be
21 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
22 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * license text for more details.
25 * For testing and management it is treated as an obd_device,
26 * although * it does not export a full OBD method table (the
27 * requests are coming * in over the wire, so object target modules
28 * do not have a full * method table.)
33 # define EXPORT_SYMTAB
35 #define DEBUG_SUBSYSTEM S_OSC
38 # include <libcfs/libcfs.h>
39 #else /* __KERNEL__ */
40 # include <liblustre.h>
43 #include <lustre_dlm.h>
44 #include <libcfs/kp30.h>
45 #include <lustre_net.h>
46 #include <lustre/lustre_user.h>
47 #include <obd_cksum.h>
55 #include <lustre_ha.h>
56 #include <lprocfs_status.h>
57 #include <lustre_log.h>
58 #include <lustre_debug.h>
59 #include <lustre_param.h>
60 #include "osc_internal.h"
62 static quota_interface_t *quota_interface = NULL;
63 extern quota_interface_t osc_quota_interface;
65 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
67 /* Pack OSC object metadata for disk storage (LE byte order). */
68 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
69 struct lov_stripe_md *lsm)
74 lmm_size = sizeof(**lmmp);
79 OBD_FREE(*lmmp, lmm_size);
85 OBD_ALLOC(*lmmp, lmm_size);
91 LASSERT(lsm->lsm_object_id);
92 LASSERT(lsm->lsm_object_gr);
93 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
94 (*lmmp)->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
100 /* Unpack OSC object metadata from disk storage (LE byte order). */
101 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
102 struct lov_mds_md *lmm, int lmm_bytes)
108 if (lmm_bytes < sizeof (*lmm)) {
109 CERROR("lov_mds_md too small: %d, need %d\n",
110 lmm_bytes, (int)sizeof(*lmm));
113 /* XXX LOV_MAGIC etc check? */
115 if (lmm->lmm_object_id == 0) {
116 CERROR("lov_mds_md: zero lmm_object_id\n");
121 lsm_size = lov_stripe_md_size(1);
125 if (*lsmp != NULL && lmm == NULL) {
126 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
127 OBD_FREE(*lsmp, lsm_size);
133 OBD_ALLOC(*lsmp, lsm_size);
136 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
137 if ((*lsmp)->lsm_oinfo[0] == NULL) {
138 OBD_FREE(*lsmp, lsm_size);
141 loi_init((*lsmp)->lsm_oinfo[0]);
145 /* XXX zero *lsmp? */
146 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
147 (*lsmp)->lsm_object_gr = le64_to_cpu (lmm->lmm_object_gr);
148 LASSERT((*lsmp)->lsm_object_id);
149 LASSERT((*lsmp)->lsm_object_gr);
152 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
157 static inline void osc_pack_capa(struct ptlrpc_request *req,
158 struct ost_body *body, void *capa)
160 struct obd_capa *oc = (struct obd_capa *)capa;
161 struct lustre_capa *c;
166 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
169 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
170 DEBUG_CAPA(D_SEC, c, "pack");
173 static inline void osc_pack_req_body(struct ptlrpc_request *req,
174 struct obd_info *oinfo)
176 struct ost_body *body;
178 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
181 body->oa = *oinfo->oi_oa;
182 osc_pack_capa(req, body, oinfo->oi_capa);
185 static inline void osc_set_capa_size(struct ptlrpc_request *req,
186 const struct req_msg_field *field,
190 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
192 /* it is already calculated as sizeof struct obd_capa */
196 static int osc_getattr_interpret(struct ptlrpc_request *req,
197 struct osc_async_args *aa, int rc)
199 struct ost_body *body;
205 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
206 lustre_swab_ost_body);
208 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
209 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
211 /* This should really be sent by the OST */
212 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
213 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
215 CDEBUG(D_INFO, "can't unpack ost_body\n");
217 aa->aa_oi->oi_oa->o_valid = 0;
220 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
224 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
225 struct ptlrpc_request_set *set)
227 struct ptlrpc_request *req;
228 struct osc_async_args *aa;
232 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
236 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
237 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
239 ptlrpc_request_free(req);
243 osc_pack_req_body(req, oinfo);
245 ptlrpc_request_set_replen(req);
246 req->rq_interpret_reply = osc_getattr_interpret;
248 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
249 aa = (struct osc_async_args *)&req->rq_async_args;
252 ptlrpc_set_add_req(set, req);
256 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
258 struct ptlrpc_request *req;
259 struct ost_body *body;
263 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
267 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
268 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
270 ptlrpc_request_free(req);
274 osc_pack_req_body(req, oinfo);
276 ptlrpc_request_set_replen(req);
278 rc = ptlrpc_queue_wait(req);
282 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
284 GOTO(out, rc = -EPROTO);
286 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
287 *oinfo->oi_oa = body->oa;
289 /* This should really be sent by the OST */
290 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
291 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
295 ptlrpc_req_finished(req);
299 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
300 struct obd_trans_info *oti)
302 struct ptlrpc_request *req;
303 struct ost_body *body;
307 LASSERT(!(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP) ||
308 oinfo->oi_oa->o_gr > 0);
310 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
314 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
315 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
317 ptlrpc_request_free(req);
321 osc_pack_req_body(req, oinfo);
323 ptlrpc_request_set_replen(req);
326 rc = ptlrpc_queue_wait(req);
330 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
332 GOTO(out, rc = -EPROTO);
334 *oinfo->oi_oa = body->oa;
338 ptlrpc_req_finished(req);
342 static int osc_setattr_interpret(struct ptlrpc_request *req,
343 struct osc_async_args *aa, int rc)
345 struct ost_body *body;
351 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
353 GOTO(out, rc = -EPROTO);
355 *aa->aa_oi->oi_oa = body->oa;
357 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
361 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
362 struct obd_trans_info *oti,
363 struct ptlrpc_request_set *rqset)
365 struct ptlrpc_request *req;
366 struct osc_async_args *aa;
370 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
374 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
375 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
377 ptlrpc_request_free(req);
381 osc_pack_req_body(req, oinfo);
383 ptlrpc_request_set_replen(req);
385 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
387 *obdo_logcookie(oinfo->oi_oa) = *oti->oti_logcookies;
390 /* do mds to ost setattr asynchronouly */
392 /* Do not wait for response. */
393 ptlrpcd_add_req(req);
395 req->rq_interpret_reply = osc_setattr_interpret;
397 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
398 aa = (struct osc_async_args *)&req->rq_async_args;
401 ptlrpc_set_add_req(rqset, req);
407 int osc_real_create(struct obd_export *exp, struct obdo *oa,
408 struct lov_stripe_md **ea, struct obd_trans_info *oti)
410 struct ptlrpc_request *req;
411 struct ost_body *body;
412 struct lov_stripe_md *lsm;
421 rc = obd_alloc_memmd(exp, &lsm);
426 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
428 GOTO(out, rc = -ENOMEM);
430 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
432 ptlrpc_request_free(req);
436 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
440 ptlrpc_request_set_replen(req);
442 if (oa->o_valid & OBD_MD_FLINLINE) {
443 LASSERT((oa->o_valid & OBD_MD_FLFLAGS) &&
444 oa->o_flags == OBD_FL_DELORPHAN);
446 "delorphan from OST integration");
447 /* Don't resend the delorphan req */
448 req->rq_no_resend = req->rq_no_delay = 1;
451 rc = ptlrpc_queue_wait(req);
455 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
457 GOTO(out_req, rc = -EPROTO);
461 /* This should really be sent by the OST */
462 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
463 oa->o_valid |= OBD_MD_FLBLKSZ;
465 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
466 * have valid lsm_oinfo data structs, so don't go touching that.
467 * This needs to be fixed in a big way.
469 lsm->lsm_object_id = oa->o_id;
470 lsm->lsm_object_gr = oa->o_gr;
474 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
476 if (oa->o_valid & OBD_MD_FLCOOKIE) {
477 if (!oti->oti_logcookies)
478 oti_alloc_cookies(oti, 1);
479 *oti->oti_logcookies = *obdo_logcookie(oa);
483 CDEBUG(D_HA, "transno: "LPD64"\n",
484 lustre_msg_get_transno(req->rq_repmsg));
486 ptlrpc_req_finished(req);
489 obd_free_memmd(exp, &lsm);
493 static int osc_punch_interpret(struct ptlrpc_request *req,
494 struct osc_async_args *aa, int rc)
496 struct ost_body *body;
502 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
504 GOTO(out, rc = -EPROTO);
506 *aa->aa_oi->oi_oa = body->oa;
508 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
512 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
513 struct obd_trans_info *oti,
514 struct ptlrpc_request_set *rqset)
516 struct ptlrpc_request *req;
517 struct osc_async_args *aa;
518 struct ost_body *body;
523 CDEBUG(D_INFO, "oa NULL\n");
527 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
531 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
532 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
534 ptlrpc_request_free(req);
537 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
538 osc_pack_req_body(req, oinfo);
540 /* overload the size and blocks fields in the oa with start/end */
541 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
543 body->oa.o_size = oinfo->oi_policy.l_extent.start;
544 body->oa.o_blocks = oinfo->oi_policy.l_extent.end;
545 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
546 ptlrpc_request_set_replen(req);
549 req->rq_interpret_reply = osc_punch_interpret;
550 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
551 aa = (struct osc_async_args *)&req->rq_async_args;
553 ptlrpc_set_add_req(rqset, req);
558 static int osc_sync(struct obd_export *exp, struct obdo *oa,
559 struct lov_stripe_md *md, obd_size start, obd_size end,
562 struct ptlrpc_request *req;
563 struct ost_body *body;
568 CDEBUG(D_INFO, "oa NULL\n");
572 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
576 osc_set_capa_size(req, &RMF_CAPA1, capa);
577 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
579 ptlrpc_request_free(req);
583 /* overload the size and blocks fields in the oa with start/end */
584 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
587 body->oa.o_size = start;
588 body->oa.o_blocks = end;
589 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
590 osc_pack_capa(req, body, capa);
592 ptlrpc_request_set_replen(req);
594 rc = ptlrpc_queue_wait(req);
598 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
600 GOTO(out, rc = -EPROTO);
606 ptlrpc_req_finished(req);
610 /* Find and cancel locally locks matched by @mode in the resource found by
611 * @objid. Found locks are added into @cancel list. Returns the amount of
612 * locks added to @cancels list. */
613 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
614 struct list_head *cancels, ldlm_mode_t mode,
617 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
618 struct ldlm_res_id res_id = { .name = { oa->o_id, 0, oa->o_gr, 0 } };
619 struct ldlm_resource *res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
626 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
627 lock_flags, 0, NULL);
628 ldlm_resource_putref(res);
632 static int osc_destroy_interpret(struct ptlrpc_request *req, void *data,
635 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
637 atomic_dec(&cli->cl_destroy_in_flight);
638 cfs_waitq_signal(&cli->cl_destroy_waitq);
642 static int osc_can_send_destroy(struct client_obd *cli)
644 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
645 cli->cl_max_rpcs_in_flight) {
646 /* The destroy request can be sent */
649 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
650 cli->cl_max_rpcs_in_flight) {
652 * The counter has been modified between the two atomic
655 cfs_waitq_signal(&cli->cl_destroy_waitq);
660 /* Destroy requests can be async always on the client, and we don't even really
661 * care about the return code since the client cannot do anything at all about
663 * When the MDS is unlinking a filename, it saves the file objects into a
664 * recovery llog, and these object records are cancelled when the OST reports
665 * they were destroyed and sync'd to disk (i.e. transaction committed).
666 * If the client dies, or the OST is down when the object should be destroyed,
667 * the records are not cancelled, and when the OST reconnects to the MDS next,
668 * it will retrieve the llog unlink logs and then sends the log cancellation
669 * cookies to the MDS after committing destroy transactions. */
670 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
671 struct lov_stripe_md *ea, struct obd_trans_info *oti,
672 struct obd_export *md_export)
674 struct client_obd *cli = &exp->exp_obd->u.cli;
675 struct ptlrpc_request *req;
676 struct ost_body *body;
677 CFS_LIST_HEAD(cancels);
682 CDEBUG(D_INFO, "oa NULL\n");
686 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
687 LDLM_FL_DISCARD_DATA);
689 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
691 ldlm_lock_list_put(&cancels, l_bl_ast, count);
695 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
698 ptlrpc_request_free(req);
702 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
703 req->rq_interpret_reply = osc_destroy_interpret;
705 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
706 memcpy(obdo_logcookie(oa), oti->oti_logcookies,
707 sizeof(*oti->oti_logcookies));
708 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
712 ptlrpc_request_set_replen(req);
714 if (!osc_can_send_destroy(cli)) {
715 struct l_wait_info lwi = { 0 };
718 * Wait until the number of on-going destroy RPCs drops
719 * under max_rpc_in_flight
721 l_wait_event_exclusive(cli->cl_destroy_waitq,
722 osc_can_send_destroy(cli), &lwi);
725 /* Do not wait for response */
726 ptlrpcd_add_req(req);
730 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
733 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
735 LASSERT(!(oa->o_valid & bits));
738 client_obd_list_lock(&cli->cl_loi_list_lock);
739 oa->o_dirty = cli->cl_dirty;
740 if (cli->cl_dirty > cli->cl_dirty_max) {
741 CERROR("dirty %lu > dirty_max %lu\n",
742 cli->cl_dirty, cli->cl_dirty_max);
744 } else if (atomic_read(&obd_dirty_pages) > obd_max_dirty_pages) {
745 CERROR("dirty %d > system dirty_max %d\n",
746 atomic_read(&obd_dirty_pages), obd_max_dirty_pages);
748 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
749 CERROR("dirty %lu - dirty_max %lu too big???\n",
750 cli->cl_dirty, cli->cl_dirty_max);
753 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
754 (cli->cl_max_rpcs_in_flight + 1);
755 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
757 oa->o_grant = cli->cl_avail_grant;
758 oa->o_dropped = cli->cl_lost_grant;
759 cli->cl_lost_grant = 0;
760 client_obd_list_unlock(&cli->cl_loi_list_lock);
761 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
762 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
765 /* caller must hold loi_list_lock */
766 static void osc_consume_write_grant(struct client_obd *cli,
767 struct brw_page *pga)
769 atomic_inc(&obd_dirty_pages);
770 cli->cl_dirty += CFS_PAGE_SIZE;
771 cli->cl_avail_grant -= CFS_PAGE_SIZE;
772 pga->flag |= OBD_BRW_FROM_GRANT;
773 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
774 CFS_PAGE_SIZE, pga, pga->pg);
775 LASSERT(cli->cl_avail_grant >= 0);
778 /* the companion to osc_consume_write_grant, called when a brw has completed.
779 * must be called with the loi lock held. */
780 static void osc_release_write_grant(struct client_obd *cli,
781 struct brw_page *pga, int sent)
783 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
786 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
791 pga->flag &= ~OBD_BRW_FROM_GRANT;
792 atomic_dec(&obd_dirty_pages);
793 cli->cl_dirty -= CFS_PAGE_SIZE;
795 cli->cl_lost_grant += CFS_PAGE_SIZE;
796 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
797 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
798 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
799 /* For short writes we shouldn't count parts of pages that
800 * span a whole block on the OST side, or our accounting goes
801 * wrong. Should match the code in filter_grant_check. */
802 int offset = pga->off & ~CFS_PAGE_MASK;
803 int count = pga->count + (offset & (blocksize - 1));
804 int end = (offset + pga->count) & (blocksize - 1);
806 count += blocksize - end;
808 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
809 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
810 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
811 cli->cl_avail_grant, cli->cl_dirty);
817 static unsigned long rpcs_in_flight(struct client_obd *cli)
819 return cli->cl_r_in_flight + cli->cl_w_in_flight;
822 /* caller must hold loi_list_lock */
823 void osc_wake_cache_waiters(struct client_obd *cli)
825 struct list_head *l, *tmp;
826 struct osc_cache_waiter *ocw;
829 list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
830 /* if we can't dirty more, we must wait until some is written */
831 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
832 (atomic_read(&obd_dirty_pages) + 1 > obd_max_dirty_pages)) {
833 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
834 "osc max %ld, sys max %d\n", cli->cl_dirty,
835 cli->cl_dirty_max, obd_max_dirty_pages);
839 /* if still dirty cache but no grant wait for pending RPCs that
840 * may yet return us some grant before doing sync writes */
841 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
842 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
843 cli->cl_w_in_flight);
847 ocw = list_entry(l, struct osc_cache_waiter, ocw_entry);
848 list_del_init(&ocw->ocw_entry);
849 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
850 /* no more RPCs in flight to return grant, do sync IO */
851 ocw->ocw_rc = -EDQUOT;
852 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
854 osc_consume_write_grant(cli,
855 &ocw->ocw_oap->oap_brw_page);
858 cfs_waitq_signal(&ocw->ocw_waitq);
864 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
866 client_obd_list_lock(&cli->cl_loi_list_lock);
867 cli->cl_avail_grant = ocd->ocd_grant;
868 client_obd_list_unlock(&cli->cl_loi_list_lock);
870 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld\n",
871 cli->cl_avail_grant, cli->cl_lost_grant);
872 LASSERT(cli->cl_avail_grant >= 0);
875 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
877 client_obd_list_lock(&cli->cl_loi_list_lock);
878 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
879 if (body->oa.o_valid & OBD_MD_FLGRANT)
880 cli->cl_avail_grant += body->oa.o_grant;
881 /* waiters are woken in brw_interpret_oap */
882 client_obd_list_unlock(&cli->cl_loi_list_lock);
885 /* We assume that the reason this OSC got a short read is because it read
886 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
887 * via the LOV, and it _knows_ it's reading inside the file, it's just that
888 * this stripe never got written at or beyond this stripe offset yet. */
889 static void handle_short_read(int nob_read, obd_count page_count,
890 struct brw_page **pga)
895 /* skip bytes read OK */
896 while (nob_read > 0) {
897 LASSERT (page_count > 0);
899 if (pga[i]->count > nob_read) {
900 /* EOF inside this page */
901 ptr = cfs_kmap(pga[i]->pg) +
902 (pga[i]->off & ~CFS_PAGE_MASK);
903 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
904 cfs_kunmap(pga[i]->pg);
910 nob_read -= pga[i]->count;
915 /* zero remaining pages */
916 while (page_count-- > 0) {
917 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
918 memset(ptr, 0, pga[i]->count);
919 cfs_kunmap(pga[i]->pg);
924 static int check_write_rcs(struct ptlrpc_request *req,
925 int requested_nob, int niocount,
926 obd_count page_count, struct brw_page **pga)
930 /* return error if any niobuf was in error */
931 remote_rcs = lustre_swab_repbuf(req, REQ_REC_OFF + 1,
932 sizeof(*remote_rcs) * niocount, NULL);
933 if (remote_rcs == NULL) {
934 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
937 if (lustre_msg_swabbed(req->rq_repmsg))
938 for (i = 0; i < niocount; i++)
939 __swab32s(&remote_rcs[i]);
941 for (i = 0; i < niocount; i++) {
942 if (remote_rcs[i] < 0)
943 return(remote_rcs[i]);
945 if (remote_rcs[i] != 0) {
946 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
947 i, remote_rcs[i], req);
952 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
953 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
954 requested_nob, req->rq_bulk->bd_nob_transferred);
961 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
963 if (p1->flag != p2->flag) {
964 unsigned mask = ~OBD_BRW_FROM_GRANT;
966 /* warn if we try to combine flags that we don't know to be
968 if ((p1->flag & mask) != (p2->flag & mask))
969 CERROR("is it ok to have flags 0x%x and 0x%x in the "
970 "same brw?\n", p1->flag, p2->flag);
974 return (p1->off + p1->count == p2->off);
977 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
978 struct brw_page **pga, int opc,
979 cksum_type_t cksum_type)
984 LASSERT (pg_count > 0);
985 cksum = init_checksum(cksum_type);
986 while (nob > 0 && pg_count > 0) {
987 unsigned char *ptr = cfs_kmap(pga[i]->pg);
988 int off = pga[i]->off & ~CFS_PAGE_MASK;
989 int count = pga[i]->count > nob ? nob : pga[i]->count;
991 /* corrupt the data before we compute the checksum, to
992 * simulate an OST->client data error */
993 if (i == 0 && opc == OST_READ &&
994 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
995 memcpy(ptr + off, "bad1", min(4, nob));
996 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
997 cfs_kunmap(pga[i]->pg);
998 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1001 nob -= pga[i]->count;
1005 /* For sending we only compute the wrong checksum instead
1006 * of corrupting the data so it is still correct on a redo */
1007 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1013 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1014 struct lov_stripe_md *lsm, obd_count page_count,
1015 struct brw_page **pga,
1016 struct ptlrpc_request **reqp,
1017 struct obd_capa *ocapa)
1019 struct ptlrpc_request *req;
1020 struct ptlrpc_bulk_desc *desc;
1021 struct ost_body *body;
1022 struct obd_ioobj *ioobj;
1023 struct niobuf_remote *niobuf;
1024 int niocount, i, requested_nob, opc, rc;
1025 struct osc_brw_async_args *aa;
1026 struct req_capsule *pill;
1029 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1030 RETURN(-ENOMEM); /* Recoverable */
1031 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1032 RETURN(-EINVAL); /* Fatal */
1034 if ((cmd & OBD_BRW_WRITE) != 0) {
1036 req = ptlrpc_request_alloc_pool(cli->cl_import,
1037 cli->cl_import->imp_rq_pool,
1041 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW);
1047 for (niocount = i = 1; i < page_count; i++) {
1048 if (!can_merge_pages(pga[i - 1], pga[i]))
1052 pill = &req->rq_pill;
1053 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1054 niocount * sizeof(*niobuf));
1055 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1057 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1059 ptlrpc_request_free(req);
1062 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1064 if (opc == OST_WRITE)
1065 desc = ptlrpc_prep_bulk_imp(req, page_count,
1066 BULK_GET_SOURCE, OST_BULK_PORTAL);
1068 desc = ptlrpc_prep_bulk_imp(req, page_count,
1069 BULK_PUT_SINK, OST_BULK_PORTAL);
1072 GOTO(out, rc = -ENOMEM);
1073 /* NB request now owns desc and will free it when it gets freed */
1075 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1076 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1077 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1078 LASSERT(body && ioobj && niobuf);
1082 obdo_to_ioobj(oa, ioobj);
1083 ioobj->ioo_bufcnt = niocount;
1084 osc_pack_capa(req, body, ocapa);
1085 LASSERT (page_count > 0);
1086 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1087 struct brw_page *pg = pga[i];
1088 struct brw_page *pg_prev = pga[i - 1];
1090 LASSERT(pg->count > 0);
1091 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1092 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1093 pg->off, pg->count);
1095 LASSERTF(i == 0 || pg->off > pg_prev->off,
1096 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1097 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1099 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1100 pg_prev->pg, page_private(pg_prev->pg),
1101 pg_prev->pg->index, pg_prev->off);
1103 LASSERTF(i == 0 || pg->off > pg_prev->off,
1104 "i %d p_c %u\n", i, page_count);
1106 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1107 (pg->flag & OBD_BRW_SRVLOCK));
1109 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1111 requested_nob += pg->count;
1113 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1115 niobuf->len += pg->count;
1117 niobuf->offset = pg->off;
1118 niobuf->len = pg->count;
1119 niobuf->flags = pg->flag;
1123 LASSERT((void *)(niobuf - niocount) ==
1124 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1125 niocount * sizeof(*niobuf)));
1126 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1128 /* size[REQ_REC_OFF] still sizeof (*body) */
1129 if (opc == OST_WRITE) {
1130 if (unlikely(cli->cl_checksum) &&
1131 req->rq_flvr.sf_bulk_hash == BULK_HASH_ALG_NULL) {
1132 /* store cl_cksum_type in a local variable since
1133 * it can be changed via lprocfs */
1134 cksum_type_t cksum_type = cli->cl_cksum_type;
1136 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1137 oa->o_flags = body->oa.o_flags = 0;
1138 body->oa.o_flags |= cksum_type_pack(cksum_type);
1139 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1140 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1144 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1146 /* save this in 'oa', too, for later checking */
1147 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1148 oa->o_flags |= cksum_type_pack(cksum_type);
1150 /* clear out the checksum flag, in case this is a
1151 * resend but cl_checksum is no longer set. b=11238 */
1152 oa->o_valid &= ~OBD_MD_FLCKSUM;
1154 oa->o_cksum = body->oa.o_cksum;
1155 /* 1 RC per niobuf */
1156 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER,
1157 sizeof(__u32) * niocount);
1159 if (unlikely(cli->cl_checksum) &&
1160 req->rq_flvr.sf_bulk_hash == BULK_HASH_ALG_NULL) {
1161 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1162 body->oa.o_flags = 0;
1163 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1164 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1166 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER, 0);
1167 /* 1 RC for the whole I/O */
1169 ptlrpc_request_set_replen(req);
1171 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1172 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1174 aa->aa_requested_nob = requested_nob;
1175 aa->aa_nio_count = niocount;
1176 aa->aa_page_count = page_count;
1180 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1186 ptlrpc_req_finished(req);
1190 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1191 __u32 client_cksum, __u32 server_cksum, int nob,
1192 obd_count page_count, struct brw_page **pga,
1193 cksum_type_t client_cksum_type)
1197 cksum_type_t cksum_type;
1199 if (server_cksum == client_cksum) {
1200 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1204 if (oa->o_valid & OBD_MD_FLFLAGS)
1205 cksum_type = cksum_type_unpack(oa->o_flags);
1207 cksum_type = OBD_CKSUM_CRC32;
1209 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1212 if (cksum_type != client_cksum_type)
1213 msg = "the server did not use the checksum type specified in "
1214 "the original request - likely a protocol problem";
1215 else if (new_cksum == server_cksum)
1216 msg = "changed on the client after we checksummed it - "
1217 "likely false positive due to mmap IO (bug 11742)";
1218 else if (new_cksum == client_cksum)
1219 msg = "changed in transit before arrival at OST";
1221 msg = "changed in transit AND doesn't match the original - "
1222 "likely false positive due to mmap IO (bug 11742)";
1224 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1225 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1226 "["LPU64"-"LPU64"]\n",
1227 msg, libcfs_nid2str(peer->nid),
1228 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1229 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1232 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1234 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1235 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1236 "client csum now %x\n", client_cksum, client_cksum_type,
1237 server_cksum, cksum_type, new_cksum);
1241 /* Note rc enters this function as number of bytes transferred */
1242 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1244 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1245 const lnet_process_id_t *peer =
1246 &req->rq_import->imp_connection->c_peer;
1247 struct client_obd *cli = aa->aa_cli;
1248 struct ost_body *body;
1249 __u32 client_cksum = 0;
1252 if (rc < 0 && rc != -EDQUOT)
1255 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1256 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1257 lustre_swab_ost_body);
1259 CDEBUG(D_INFO, "Can't unpack body\n");
1263 /* set/clear over quota flag for a uid/gid */
1264 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1265 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA))
1266 lquota_setdq(quota_interface, cli, body->oa.o_uid,
1267 body->oa.o_gid, body->oa.o_valid,
1273 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1274 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1276 osc_update_grant(cli, body);
1278 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1280 CERROR("Unexpected +ve rc %d\n", rc);
1283 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1285 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1286 check_write_checksum(&body->oa, peer, client_cksum,
1287 body->oa.o_cksum, aa->aa_requested_nob,
1288 aa->aa_page_count, aa->aa_ppga,
1289 cksum_type_unpack(aa->aa_oa->o_flags)))
1292 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1295 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1296 aa->aa_page_count, aa->aa_ppga);
1300 /* The rest of this function executes only for OST_READs */
1301 if (rc > aa->aa_requested_nob) {
1302 CERROR("Unexpected rc %d (%d requested)\n", rc,
1303 aa->aa_requested_nob);
1307 if (rc != req->rq_bulk->bd_nob_transferred) {
1308 CERROR ("Unexpected rc %d (%d transferred)\n",
1309 rc, req->rq_bulk->bd_nob_transferred);
1313 if (rc < aa->aa_requested_nob)
1314 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1316 if (sptlrpc_cli_unwrap_bulk_read(req, rc, aa->aa_page_count,
1318 GOTO(out, rc = -EAGAIN);
1320 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1321 static int cksum_counter;
1322 __u32 server_cksum = body->oa.o_cksum;
1325 cksum_type_t cksum_type;
1327 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1328 cksum_type = cksum_type_unpack(body->oa.o_flags);
1330 cksum_type = OBD_CKSUM_CRC32;
1331 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1332 aa->aa_ppga, OST_READ,
1335 if (peer->nid == req->rq_bulk->bd_sender) {
1339 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1342 if (server_cksum == ~0 && rc > 0) {
1343 CERROR("Protocol error: server %s set the 'checksum' "
1344 "bit, but didn't send a checksum. Not fatal, "
1345 "but please tell CFS.\n",
1346 libcfs_nid2str(peer->nid));
1347 } else if (server_cksum != client_cksum) {
1348 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1349 "%s%s%s inum "LPU64"/"LPU64" object "
1350 LPU64"/"LPU64" extent "
1351 "["LPU64"-"LPU64"]\n",
1352 req->rq_import->imp_obd->obd_name,
1353 libcfs_nid2str(peer->nid),
1355 body->oa.o_valid & OBD_MD_FLFID ?
1356 body->oa.o_fid : (__u64)0,
1357 body->oa.o_valid & OBD_MD_FLFID ?
1358 body->oa.o_generation :(__u64)0,
1360 body->oa.o_valid & OBD_MD_FLGROUP ?
1361 body->oa.o_gr : (__u64)0,
1362 aa->aa_ppga[0]->off,
1363 aa->aa_ppga[aa->aa_page_count-1]->off +
1364 aa->aa_ppga[aa->aa_page_count-1]->count -
1366 CERROR("client %x, server %x, cksum_type %x\n",
1367 client_cksum, server_cksum, cksum_type);
1369 aa->aa_oa->o_cksum = client_cksum;
1373 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1376 } else if (unlikely(client_cksum)) {
1377 static int cksum_missed;
1380 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1381 CERROR("Checksum %u requested from %s but not sent\n",
1382 cksum_missed, libcfs_nid2str(peer->nid));
1388 *aa->aa_oa = body->oa;
1393 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1394 struct lov_stripe_md *lsm,
1395 obd_count page_count, struct brw_page **pga,
1396 struct obd_capa *ocapa)
1398 struct ptlrpc_request *req;
1402 struct l_wait_info lwi;
1406 cfs_waitq_init(&waitq);
1409 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1410 page_count, pga, &req, ocapa);
1414 rc = ptlrpc_queue_wait(req);
1416 if (rc == -ETIMEDOUT && req->rq_resend) {
1417 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1418 ptlrpc_req_finished(req);
1422 rc = osc_brw_fini_request(req, rc);
1424 ptlrpc_req_finished(req);
1425 if (osc_recoverable_error(rc)) {
1427 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1428 CERROR("too many resend retries, returning error\n");
1432 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1433 l_wait_event(waitq, 0, &lwi);
1441 int osc_brw_redo_request(struct ptlrpc_request *request,
1442 struct osc_brw_async_args *aa)
1444 struct ptlrpc_request *new_req;
1445 struct ptlrpc_request_set *set = request->rq_set;
1446 struct osc_brw_async_args *new_aa;
1447 struct osc_async_page *oap;
1451 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1452 CERROR("too many resend retries, returning error\n");
1456 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1458 body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1459 if (body->oa.o_valid & OBD_MD_FLOSSCAPA)
1460 ocapa = lustre_unpack_capa(request->rq_reqmsg,
1463 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1464 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1465 aa->aa_cli, aa->aa_oa,
1466 NULL /* lsm unused by osc currently */,
1467 aa->aa_page_count, aa->aa_ppga,
1468 &new_req, NULL /* ocapa */);
1472 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1474 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1475 if (oap->oap_request != NULL) {
1476 LASSERTF(request == oap->oap_request,
1477 "request %p != oap_request %p\n",
1478 request, oap->oap_request);
1479 if (oap->oap_interrupted) {
1480 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1481 ptlrpc_req_finished(new_req);
1486 /* New request takes over pga and oaps from old request.
1487 * Note that copying a list_head doesn't work, need to move it... */
1489 new_req->rq_interpret_reply = request->rq_interpret_reply;
1490 new_req->rq_async_args = request->rq_async_args;
1491 new_req->rq_sent = CURRENT_SECONDS + aa->aa_resends;
1493 new_aa = (struct osc_brw_async_args *)&new_req->rq_async_args;
1495 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1496 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1497 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1499 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1500 if (oap->oap_request) {
1501 ptlrpc_req_finished(oap->oap_request);
1502 oap->oap_request = ptlrpc_request_addref(new_req);
1506 /* use ptlrpc_set_add_req is safe because interpret functions work
1507 * in check_set context. only one way exist with access to request
1508 * from different thread got -EINTR - this way protected with
1509 * cl_loi_list_lock */
1510 ptlrpc_set_add_req(set, new_req);
1512 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1514 DEBUG_REQ(D_INFO, new_req, "new request");
1518 static int brw_interpret(struct ptlrpc_request *req, void *data, int rc)
1520 struct osc_brw_async_args *aa = data;
1524 rc = osc_brw_fini_request(req, rc);
1525 if (osc_recoverable_error(rc)) {
1526 rc = osc_brw_redo_request(req, aa);
1531 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1532 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1533 aa->aa_cli->cl_w_in_flight--;
1535 aa->aa_cli->cl_r_in_flight--;
1536 for (i = 0; i < aa->aa_page_count; i++)
1537 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
1538 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1540 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1545 static int async_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1546 struct lov_stripe_md *lsm, obd_count page_count,
1547 struct brw_page **pga, struct ptlrpc_request_set *set,
1548 struct obd_capa *ocapa)
1550 struct ptlrpc_request *req;
1551 struct client_obd *cli = &exp->exp_obd->u.cli;
1553 struct osc_brw_async_args *aa;
1556 /* Consume write credits even if doing a sync write -
1557 * otherwise we may run out of space on OST due to grant. */
1558 if (cmd == OBD_BRW_WRITE) {
1559 spin_lock(&cli->cl_loi_list_lock);
1560 for (i = 0; i < page_count; i++) {
1561 if (cli->cl_avail_grant >= CFS_PAGE_SIZE)
1562 osc_consume_write_grant(cli, pga[i]);
1564 spin_unlock(&cli->cl_loi_list_lock);
1567 rc = osc_brw_prep_request(cmd, cli, oa, lsm, page_count, pga,
1570 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1571 if (cmd == OBD_BRW_READ) {
1572 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
1573 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
1574 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
1576 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
1577 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
1578 cli->cl_w_in_flight);
1579 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
1583 req->rq_interpret_reply = brw_interpret;
1584 ptlrpc_set_add_req(set, req);
1585 client_obd_list_lock(&cli->cl_loi_list_lock);
1586 if (cmd == OBD_BRW_READ)
1587 cli->cl_r_in_flight++;
1589 cli->cl_w_in_flight++;
1590 client_obd_list_unlock(&cli->cl_loi_list_lock);
1591 } else if (cmd == OBD_BRW_WRITE) {
1592 client_obd_list_lock(&cli->cl_loi_list_lock);
1593 for (i = 0; i < page_count; i++)
1594 osc_release_write_grant(cli, pga[i], 0);
1595 client_obd_list_unlock(&cli->cl_loi_list_lock);
1601 * ugh, we want disk allocation on the target to happen in offset order. we'll
1602 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1603 * fine for our small page arrays and doesn't require allocation. its an
1604 * insertion sort that swaps elements that are strides apart, shrinking the
1605 * stride down until its '1' and the array is sorted.
1607 static void sort_brw_pages(struct brw_page **array, int num)
1610 struct brw_page *tmp;
1614 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1619 for (i = stride ; i < num ; i++) {
1622 while (j >= stride && array[j - stride]->off > tmp->off) {
1623 array[j] = array[j - stride];
1628 } while (stride > 1);
1631 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1637 LASSERT (pages > 0);
1638 offset = pg[i]->off & ~CFS_PAGE_MASK;
1642 if (pages == 0) /* that's all */
1645 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1646 return count; /* doesn't end on page boundary */
1649 offset = pg[i]->off & ~CFS_PAGE_MASK;
1650 if (offset != 0) /* doesn't start on page boundary */
1657 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1659 struct brw_page **ppga;
1662 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1666 for (i = 0; i < count; i++)
1671 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1673 LASSERT(ppga != NULL);
1674 OBD_FREE(ppga, sizeof(*ppga) * count);
1677 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1678 obd_count page_count, struct brw_page *pga,
1679 struct obd_trans_info *oti)
1681 struct obdo *saved_oa = NULL;
1682 struct brw_page **ppga, **orig;
1683 struct obd_import *imp = class_exp2cliimp(exp);
1684 struct client_obd *cli = &imp->imp_obd->u.cli;
1685 int rc, page_count_orig;
1688 if (cmd & OBD_BRW_CHECK) {
1689 /* The caller just wants to know if there's a chance that this
1690 * I/O can succeed */
1692 if (imp == NULL || imp->imp_invalid)
1697 /* test_brw with a failed create can trip this, maybe others. */
1698 LASSERT(cli->cl_max_pages_per_rpc);
1702 orig = ppga = osc_build_ppga(pga, page_count);
1705 page_count_orig = page_count;
1707 sort_brw_pages(ppga, page_count);
1708 while (page_count) {
1709 obd_count pages_per_brw;
1711 if (page_count > cli->cl_max_pages_per_rpc)
1712 pages_per_brw = cli->cl_max_pages_per_rpc;
1714 pages_per_brw = page_count;
1716 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1718 if (saved_oa != NULL) {
1719 /* restore previously saved oa */
1720 *oinfo->oi_oa = *saved_oa;
1721 } else if (page_count > pages_per_brw) {
1722 /* save a copy of oa (brw will clobber it) */
1723 OBDO_ALLOC(saved_oa);
1724 if (saved_oa == NULL)
1725 GOTO(out, rc = -ENOMEM);
1726 *saved_oa = *oinfo->oi_oa;
1729 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1730 pages_per_brw, ppga, oinfo->oi_capa);
1735 page_count -= pages_per_brw;
1736 ppga += pages_per_brw;
1740 osc_release_ppga(orig, page_count_orig);
1742 if (saved_oa != NULL)
1743 OBDO_FREE(saved_oa);
1748 static int osc_brw_async(int cmd, struct obd_export *exp,
1749 struct obd_info *oinfo, obd_count page_count,
1750 struct brw_page *pga, struct obd_trans_info *oti,
1751 struct ptlrpc_request_set *set)
1753 struct brw_page **ppga, **orig;
1754 struct client_obd *cli = &exp->exp_obd->u.cli;
1755 int page_count_orig;
1759 if (cmd & OBD_BRW_CHECK) {
1760 struct obd_import *imp = class_exp2cliimp(exp);
1761 /* The caller just wants to know if there's a chance that this
1762 * I/O can succeed */
1764 if (imp == NULL || imp->imp_invalid)
1769 orig = ppga = osc_build_ppga(pga, page_count);
1772 page_count_orig = page_count;
1774 sort_brw_pages(ppga, page_count);
1775 while (page_count) {
1776 struct brw_page **copy;
1777 obd_count pages_per_brw;
1779 pages_per_brw = min_t(obd_count, page_count,
1780 cli->cl_max_pages_per_rpc);
1782 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1784 /* use ppga only if single RPC is going to fly */
1785 if (pages_per_brw != page_count_orig || ppga != orig) {
1786 OBD_ALLOC(copy, sizeof(*copy) * pages_per_brw);
1788 GOTO(out, rc = -ENOMEM);
1789 memcpy(copy, ppga, sizeof(*copy) * pages_per_brw);
1793 rc = async_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1794 pages_per_brw, copy, set, oinfo->oi_capa);
1798 OBD_FREE(copy, sizeof(*copy) * pages_per_brw);
1802 /* we passed it to async_internal() which is
1803 * now responsible for releasing memory */
1807 page_count -= pages_per_brw;
1808 ppga += pages_per_brw;
1812 osc_release_ppga(orig, page_count_orig);
1816 static void osc_check_rpcs(struct client_obd *cli);
1818 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1819 * the dirty accounting. Writeback completes or truncate happens before
1820 * writing starts. Must be called with the loi lock held. */
1821 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1824 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1828 /* This maintains the lists of pending pages to read/write for a given object
1829 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1830 * to quickly find objects that are ready to send an RPC. */
1831 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1837 if (lop->lop_num_pending == 0)
1840 /* if we have an invalid import we want to drain the queued pages
1841 * by forcing them through rpcs that immediately fail and complete
1842 * the pages. recovery relies on this to empty the queued pages
1843 * before canceling the locks and evicting down the llite pages */
1844 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1847 /* stream rpcs in queue order as long as as there is an urgent page
1848 * queued. this is our cheap solution for good batching in the case
1849 * where writepage marks some random page in the middle of the file
1850 * as urgent because of, say, memory pressure */
1851 if (!list_empty(&lop->lop_urgent)) {
1852 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1855 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1856 optimal = cli->cl_max_pages_per_rpc;
1857 if (cmd & OBD_BRW_WRITE) {
1858 /* trigger a write rpc stream as long as there are dirtiers
1859 * waiting for space. as they're waiting, they're not going to
1860 * create more pages to coallesce with what's waiting.. */
1861 if (!list_empty(&cli->cl_cache_waiters)) {
1862 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1865 /* +16 to avoid triggering rpcs that would want to include pages
1866 * that are being queued but which can't be made ready until
1867 * the queuer finishes with the page. this is a wart for
1868 * llite::commit_write() */
1871 if (lop->lop_num_pending >= optimal)
1877 static void on_list(struct list_head *item, struct list_head *list,
1880 if (list_empty(item) && should_be_on)
1881 list_add_tail(item, list);
1882 else if (!list_empty(item) && !should_be_on)
1883 list_del_init(item);
1886 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1887 * can find pages to build into rpcs quickly */
1888 static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1890 on_list(&loi->loi_cli_item, &cli->cl_loi_ready_list,
1891 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE) ||
1892 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1894 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1895 loi->loi_write_lop.lop_num_pending);
1897 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1898 loi->loi_read_lop.lop_num_pending);
1901 static void lop_update_pending(struct client_obd *cli,
1902 struct loi_oap_pages *lop, int cmd, int delta)
1904 lop->lop_num_pending += delta;
1905 if (cmd & OBD_BRW_WRITE)
1906 cli->cl_pending_w_pages += delta;
1908 cli->cl_pending_r_pages += delta;
1911 /* this is called when a sync waiter receives an interruption. Its job is to
1912 * get the caller woken as soon as possible. If its page hasn't been put in an
1913 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
1914 * desiring interruption which will forcefully complete the rpc once the rpc
1916 static void osc_occ_interrupted(struct oig_callback_context *occ)
1918 struct osc_async_page *oap;
1919 struct loi_oap_pages *lop;
1920 struct lov_oinfo *loi;
1923 /* XXX member_of() */
1924 oap = list_entry(occ, struct osc_async_page, oap_occ);
1926 client_obd_list_lock(&oap->oap_cli->cl_loi_list_lock);
1928 oap->oap_interrupted = 1;
1930 /* ok, it's been put in an rpc. only one oap gets a request reference */
1931 if (oap->oap_request != NULL) {
1932 ptlrpc_mark_interrupted(oap->oap_request);
1933 ptlrpcd_wake(oap->oap_request);
1937 /* we don't get interruption callbacks until osc_trigger_group_io()
1938 * has been called and put the sync oaps in the pending/urgent lists.*/
1939 if (!list_empty(&oap->oap_pending_item)) {
1940 list_del_init(&oap->oap_pending_item);
1941 list_del_init(&oap->oap_urgent_item);
1944 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
1945 &loi->loi_write_lop : &loi->loi_read_lop;
1946 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
1947 loi_list_maint(oap->oap_cli, oap->oap_loi);
1949 oig_complete_one(oap->oap_oig, &oap->oap_occ, -EINTR);
1950 oap->oap_oig = NULL;
1954 client_obd_list_unlock(&oap->oap_cli->cl_loi_list_lock);
1957 /* this is trying to propogate async writeback errors back up to the
1958 * application. As an async write fails we record the error code for later if
1959 * the app does an fsync. As long as errors persist we force future rpcs to be
1960 * sync so that the app can get a sync error and break the cycle of queueing
1961 * pages for which writeback will fail. */
1962 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
1969 ar->ar_force_sync = 1;
1970 ar->ar_min_xid = ptlrpc_sample_next_xid();
1975 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
1976 ar->ar_force_sync = 0;
1979 static void osc_oap_to_pending(struct osc_async_page *oap)
1981 struct loi_oap_pages *lop;
1983 if (oap->oap_cmd & OBD_BRW_WRITE)
1984 lop = &oap->oap_loi->loi_write_lop;
1986 lop = &oap->oap_loi->loi_read_lop;
1988 if (oap->oap_async_flags & ASYNC_URGENT)
1989 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
1990 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
1991 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
1994 /* this must be called holding the loi list lock to give coverage to exit_cache,
1995 * async_flag maintenance, and oap_request */
1996 static void osc_ap_completion(struct client_obd *cli, struct obdo *oa,
1997 struct osc_async_page *oap, int sent, int rc)
2002 if (oap->oap_request != NULL) {
2003 xid = ptlrpc_req_xid(oap->oap_request);
2004 ptlrpc_req_finished(oap->oap_request);
2005 oap->oap_request = NULL;
2008 oap->oap_async_flags = 0;
2009 oap->oap_interrupted = 0;
2011 if (oap->oap_cmd & OBD_BRW_WRITE) {
2012 osc_process_ar(&cli->cl_ar, xid, rc);
2013 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2016 if (rc == 0 && oa != NULL) {
2017 if (oa->o_valid & OBD_MD_FLBLOCKS)
2018 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2019 if (oa->o_valid & OBD_MD_FLMTIME)
2020 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2021 if (oa->o_valid & OBD_MD_FLATIME)
2022 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2023 if (oa->o_valid & OBD_MD_FLCTIME)
2024 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2028 osc_exit_cache(cli, oap, sent);
2029 oig_complete_one(oap->oap_oig, &oap->oap_occ, rc);
2030 oap->oap_oig = NULL;
2035 rc = oap->oap_caller_ops->ap_completion(oap->oap_caller_data,
2036 oap->oap_cmd, oa, rc);
2038 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2039 * I/O on the page could start, but OSC calls it under lock
2040 * and thus we can add oap back to pending safely */
2042 /* upper layer wants to leave the page on pending queue */
2043 osc_oap_to_pending(oap);
2045 osc_exit_cache(cli, oap, sent);
2049 static int brw_interpret_oap(struct ptlrpc_request *req, void *data, int rc)
2051 struct osc_async_page *oap, *tmp;
2052 struct osc_brw_async_args *aa = data;
2053 struct client_obd *cli;
2056 rc = osc_brw_fini_request(req, rc);
2057 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2058 if (osc_recoverable_error(rc)) {
2059 rc = osc_brw_redo_request(req, aa);
2066 client_obd_list_lock(&cli->cl_loi_list_lock);
2068 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2069 * is called so we know whether to go to sync BRWs or wait for more
2070 * RPCs to complete */
2071 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2072 cli->cl_w_in_flight--;
2074 cli->cl_r_in_flight--;
2076 /* the caller may re-use the oap after the completion call so
2077 * we need to clean it up a little */
2078 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
2079 list_del_init(&oap->oap_rpc_item);
2080 osc_ap_completion(cli, aa->aa_oa, oap, 1, rc);
2083 osc_wake_cache_waiters(cli);
2084 osc_check_rpcs(cli);
2086 client_obd_list_unlock(&cli->cl_loi_list_lock);
2088 OBDO_FREE(aa->aa_oa);
2090 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2094 static struct ptlrpc_request *osc_build_req(struct client_obd *cli,
2095 struct list_head *rpc_list,
2096 int page_count, int cmd)
2098 struct ptlrpc_request *req;
2099 struct brw_page **pga = NULL;
2100 struct osc_brw_async_args *aa;
2101 struct obdo *oa = NULL;
2102 struct obd_async_page_ops *ops = NULL;
2103 void *caller_data = NULL;
2104 struct obd_capa *ocapa;
2105 struct osc_async_page *oap;
2109 LASSERT(!list_empty(rpc_list));
2111 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2113 RETURN(ERR_PTR(-ENOMEM));
2117 GOTO(out, req = ERR_PTR(-ENOMEM));
2120 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2122 ops = oap->oap_caller_ops;
2123 caller_data = oap->oap_caller_data;
2125 pga[i] = &oap->oap_brw_page;
2126 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2127 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2128 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2132 /* always get the data for the obdo for the rpc */
2133 LASSERT(ops != NULL);
2134 ops->ap_fill_obdo(caller_data, cmd, oa);
2135 ocapa = ops->ap_lookup_capa(caller_data, cmd);
2137 sort_brw_pages(pga, page_count);
2138 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2142 CERROR("prep_req failed: %d\n", rc);
2143 GOTO(out, req = ERR_PTR(rc));
2146 /* Need to update the timestamps after the request is built in case
2147 * we race with setattr (locally or in queue at OST). If OST gets
2148 * later setattr before earlier BRW (as determined by the request xid),
2149 * the OST will not use BRW timestamps. Sadly, there is no obvious
2150 * way to do this in a single call. bug 10150 */
2151 ops->ap_update_obdo(caller_data, cmd, oa,
2152 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME);
2154 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2155 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2156 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2157 list_splice(rpc_list, &aa->aa_oaps);
2158 CFS_INIT_LIST_HEAD(rpc_list);
2165 OBD_FREE(pga, sizeof(*pga) * page_count);
2170 /* the loi lock is held across this function but it's allowed to release
2171 * and reacquire it during its work */
2172 static int osc_send_oap_rpc(struct client_obd *cli, struct lov_oinfo *loi,
2173 int cmd, struct loi_oap_pages *lop)
2175 struct ptlrpc_request *req;
2176 obd_count page_count = 0;
2177 struct osc_async_page *oap = NULL, *tmp;
2178 struct osc_brw_async_args *aa;
2179 struct obd_async_page_ops *ops;
2180 CFS_LIST_HEAD(rpc_list);
2181 unsigned int ending_offset;
2182 unsigned starting_offset = 0;
2185 /* first we find the pages we're allowed to work with */
2186 list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2188 ops = oap->oap_caller_ops;
2190 LASSERT(oap->oap_magic == OAP_MAGIC);
2192 /* in llite being 'ready' equates to the page being locked
2193 * until completion unlocks it. commit_write submits a page
2194 * as not ready because its unlock will happen unconditionally
2195 * as the call returns. if we race with commit_write giving
2196 * us that page we dont' want to create a hole in the page
2197 * stream, so we stop and leave the rpc to be fired by
2198 * another dirtier or kupdated interval (the not ready page
2199 * will still be on the dirty list). we could call in
2200 * at the end of ll_file_write to process the queue again. */
2201 if (!(oap->oap_async_flags & ASYNC_READY)) {
2202 int rc = ops->ap_make_ready(oap->oap_caller_data, cmd);
2204 CDEBUG(D_INODE, "oap %p page %p returned %d "
2205 "instead of ready\n", oap,
2209 /* llite is telling us that the page is still
2210 * in commit_write and that we should try
2211 * and put it in an rpc again later. we
2212 * break out of the loop so we don't create
2213 * a hole in the sequence of pages in the rpc
2218 /* the io isn't needed.. tell the checks
2219 * below to complete the rpc with EINTR */
2220 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2221 oap->oap_count = -EINTR;
2224 oap->oap_async_flags |= ASYNC_READY;
2227 LASSERTF(0, "oap %p page %p returned %d "
2228 "from make_ready\n", oap,
2236 * Page submitted for IO has to be locked. Either by
2237 * ->ap_make_ready() or by higher layers.
2239 * XXX nikita: this assertion should be adjusted when lustre
2240 * starts using PG_writeback for pages being written out.
2242 #if defined(__KERNEL__) && defined(__linux__)
2243 LASSERT(PageLocked(oap->oap_page));
2245 /* If there is a gap at the start of this page, it can't merge
2246 * with any previous page, so we'll hand the network a
2247 * "fragmented" page array that it can't transfer in 1 RDMA */
2248 if (page_count != 0 && oap->oap_page_off != 0)
2251 /* take the page out of our book-keeping */
2252 list_del_init(&oap->oap_pending_item);
2253 lop_update_pending(cli, lop, cmd, -1);
2254 list_del_init(&oap->oap_urgent_item);
2256 if (page_count == 0)
2257 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2258 (PTLRPC_MAX_BRW_SIZE - 1);
2260 /* ask the caller for the size of the io as the rpc leaves. */
2261 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE))
2263 ops->ap_refresh_count(oap->oap_caller_data,cmd);
2264 if (oap->oap_count <= 0) {
2265 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2267 osc_ap_completion(cli, NULL, oap, 0, oap->oap_count);
2271 /* now put the page back in our accounting */
2272 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2273 if (++page_count >= cli->cl_max_pages_per_rpc)
2276 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2277 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2278 * have the same alignment as the initial writes that allocated
2279 * extents on the server. */
2280 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2281 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2282 if (ending_offset == 0)
2285 /* If there is a gap at the end of this page, it can't merge
2286 * with any subsequent pages, so we'll hand the network a
2287 * "fragmented" page array that it can't transfer in 1 RDMA */
2288 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2292 osc_wake_cache_waiters(cli);
2294 if (page_count == 0)
2297 loi_list_maint(cli, loi);
2299 client_obd_list_unlock(&cli->cl_loi_list_lock);
2301 req = osc_build_req(cli, &rpc_list, page_count, cmd);
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(cli, NULL, oap, 0,
2317 osc_ap_completion(cli, NULL, oap, 0, PTR_ERR(req));
2319 loi_list_maint(cli, loi);
2320 RETURN(PTR_ERR(req));
2323 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2325 if (cmd == OBD_BRW_READ) {
2326 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2327 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2328 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2329 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2330 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
2332 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2333 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2334 cli->cl_w_in_flight);
2335 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2336 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2337 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
2340 client_obd_list_lock(&cli->cl_loi_list_lock);
2342 if (cmd == OBD_BRW_READ)
2343 cli->cl_r_in_flight++;
2345 cli->cl_w_in_flight++;
2347 /* queued sync pages can be torn down while the pages
2348 * were between the pending list and the rpc */
2350 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2351 /* only one oap gets a request reference */
2354 if (oap->oap_interrupted && !req->rq_intr) {
2355 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2357 ptlrpc_mark_interrupted(req);
2361 tmp->oap_request = ptlrpc_request_addref(req);
2363 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2364 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2366 req->rq_interpret_reply = brw_interpret_oap;
2367 ptlrpcd_add_req(req);
2371 #define LOI_DEBUG(LOI, STR, args...) \
2372 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2373 !list_empty(&(LOI)->loi_cli_item), \
2374 (LOI)->loi_write_lop.lop_num_pending, \
2375 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2376 (LOI)->loi_read_lop.lop_num_pending, \
2377 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2380 /* This is called by osc_check_rpcs() to find which objects have pages that
2381 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2382 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2385 /* first return all objects which we already know to have
2386 * pages ready to be stuffed into rpcs */
2387 if (!list_empty(&cli->cl_loi_ready_list))
2388 RETURN(list_entry(cli->cl_loi_ready_list.next,
2389 struct lov_oinfo, loi_cli_item));
2391 /* then if we have cache waiters, return all objects with queued
2392 * writes. This is especially important when many small files
2393 * have filled up the cache and not been fired into rpcs because
2394 * they don't pass the nr_pending/object threshhold */
2395 if (!list_empty(&cli->cl_cache_waiters) &&
2396 !list_empty(&cli->cl_loi_write_list))
2397 RETURN(list_entry(cli->cl_loi_write_list.next,
2398 struct lov_oinfo, loi_write_item));
2400 /* then return all queued objects when we have an invalid import
2401 * so that they get flushed */
2402 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2403 if (!list_empty(&cli->cl_loi_write_list))
2404 RETURN(list_entry(cli->cl_loi_write_list.next,
2405 struct lov_oinfo, loi_write_item));
2406 if (!list_empty(&cli->cl_loi_read_list))
2407 RETURN(list_entry(cli->cl_loi_read_list.next,
2408 struct lov_oinfo, loi_read_item));
2413 /* called with the loi list lock held */
2414 static void osc_check_rpcs(struct client_obd *cli)
2416 struct lov_oinfo *loi;
2417 int rc = 0, race_counter = 0;
2420 while ((loi = osc_next_loi(cli)) != NULL) {
2421 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2423 if (rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight)
2426 /* attempt some read/write balancing by alternating between
2427 * reads and writes in an object. The makes_rpc checks here
2428 * would be redundant if we were getting read/write work items
2429 * instead of objects. we don't want send_oap_rpc to drain a
2430 * partial read pending queue when we're given this object to
2431 * do io on writes while there are cache waiters */
2432 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2433 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_WRITE,
2434 &loi->loi_write_lop);
2442 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2443 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_READ,
2444 &loi->loi_read_lop);
2453 /* attempt some inter-object balancing by issueing rpcs
2454 * for each object in turn */
2455 if (!list_empty(&loi->loi_cli_item))
2456 list_del_init(&loi->loi_cli_item);
2457 if (!list_empty(&loi->loi_write_item))
2458 list_del_init(&loi->loi_write_item);
2459 if (!list_empty(&loi->loi_read_item))
2460 list_del_init(&loi->loi_read_item);
2462 loi_list_maint(cli, loi);
2464 /* send_oap_rpc fails with 0 when make_ready tells it to
2465 * back off. llite's make_ready does this when it tries
2466 * to lock a page queued for write that is already locked.
2467 * we want to try sending rpcs from many objects, but we
2468 * don't want to spin failing with 0. */
2469 if (race_counter == 10)
2475 /* we're trying to queue a page in the osc so we're subject to the
2476 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2477 * If the osc's queued pages are already at that limit, then we want to sleep
2478 * until there is space in the osc's queue for us. We also may be waiting for
2479 * write credits from the OST if there are RPCs in flight that may return some
2480 * before we fall back to sync writes.
2482 * We need this know our allocation was granted in the presence of signals */
2483 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2487 client_obd_list_lock(&cli->cl_loi_list_lock);
2488 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2489 client_obd_list_unlock(&cli->cl_loi_list_lock);
2493 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2494 * grant or cache space. */
2495 static int osc_enter_cache(struct client_obd *cli, struct lov_oinfo *loi,
2496 struct osc_async_page *oap)
2498 struct osc_cache_waiter ocw;
2499 struct l_wait_info lwi = { 0 };
2503 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2504 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2505 cli->cl_dirty_max, obd_max_dirty_pages,
2506 cli->cl_lost_grant, cli->cl_avail_grant);
2508 /* force the caller to try sync io. this can jump the list
2509 * of queued writes and create a discontiguous rpc stream */
2510 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2511 loi->loi_ar.ar_force_sync)
2514 /* Hopefully normal case - cache space and write credits available */
2515 if ((cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max) &&
2516 (atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages) &&
2517 (cli->cl_avail_grant >= CFS_PAGE_SIZE)) {
2518 /* account for ourselves */
2519 osc_consume_write_grant(cli, &oap->oap_brw_page);
2523 /* Make sure that there are write rpcs in flight to wait for. This
2524 * is a little silly as this object may not have any pending but
2525 * other objects sure might. */
2526 if (cli->cl_w_in_flight) {
2527 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2528 cfs_waitq_init(&ocw.ocw_waitq);
2532 loi_list_maint(cli, loi);
2533 osc_check_rpcs(cli);
2534 client_obd_list_unlock(&cli->cl_loi_list_lock);
2536 CDEBUG(D_CACHE, "sleeping for cache space\n");
2537 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2539 client_obd_list_lock(&cli->cl_loi_list_lock);
2540 if (!list_empty(&ocw.ocw_entry)) {
2541 list_del(&ocw.ocw_entry);
2550 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2551 struct lov_oinfo *loi, cfs_page_t *page,
2552 obd_off offset, struct obd_async_page_ops *ops,
2553 void *data, void **res)
2555 struct osc_async_page *oap;
2559 return size_round(sizeof(*oap));
2562 oap->oap_magic = OAP_MAGIC;
2563 oap->oap_cli = &exp->exp_obd->u.cli;
2566 oap->oap_caller_ops = ops;
2567 oap->oap_caller_data = data;
2569 oap->oap_page = page;
2570 oap->oap_obj_off = offset;
2572 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2573 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2574 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2576 oap->oap_occ.occ_interrupted = osc_occ_interrupted;
2578 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2582 struct osc_async_page *oap_from_cookie(void *cookie)
2584 struct osc_async_page *oap = cookie;
2585 if (oap->oap_magic != OAP_MAGIC)
2586 return ERR_PTR(-EINVAL);
2590 static int osc_queue_async_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2591 struct lov_oinfo *loi, void *cookie,
2592 int cmd, obd_off off, int count,
2593 obd_flag brw_flags, enum async_flags async_flags)
2595 struct client_obd *cli = &exp->exp_obd->u.cli;
2596 struct osc_async_page *oap;
2600 oap = oap_from_cookie(cookie);
2602 RETURN(PTR_ERR(oap));
2604 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2607 if (!list_empty(&oap->oap_pending_item) ||
2608 !list_empty(&oap->oap_urgent_item) ||
2609 !list_empty(&oap->oap_rpc_item))
2612 /* check if the file's owner/group is over quota */
2613 #ifdef HAVE_QUOTA_SUPPORT
2614 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)){
2615 struct obd_async_page_ops *ops;
2622 ops = oap->oap_caller_ops;
2623 ops->ap_fill_obdo(oap->oap_caller_data, cmd, oa);
2624 if (lquota_chkdq(quota_interface, cli, oa->o_uid, oa->o_gid) ==
2635 loi = lsm->lsm_oinfo[0];
2637 client_obd_list_lock(&cli->cl_loi_list_lock);
2640 oap->oap_page_off = off;
2641 oap->oap_count = count;
2642 oap->oap_brw_flags = brw_flags;
2643 oap->oap_async_flags = async_flags;
2645 if (cmd & OBD_BRW_WRITE) {
2646 rc = osc_enter_cache(cli, loi, oap);
2648 client_obd_list_unlock(&cli->cl_loi_list_lock);
2653 osc_oap_to_pending(oap);
2654 loi_list_maint(cli, loi);
2656 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2659 osc_check_rpcs(cli);
2660 client_obd_list_unlock(&cli->cl_loi_list_lock);
2665 /* aka (~was & now & flag), but this is more clear :) */
2666 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2668 static int osc_set_async_flags(struct obd_export *exp,
2669 struct lov_stripe_md *lsm,
2670 struct lov_oinfo *loi, void *cookie,
2671 obd_flag async_flags)
2673 struct client_obd *cli = &exp->exp_obd->u.cli;
2674 struct loi_oap_pages *lop;
2675 struct osc_async_page *oap;
2679 oap = oap_from_cookie(cookie);
2681 RETURN(PTR_ERR(oap));
2684 * bug 7311: OST-side locking is only supported for liblustre for now
2685 * (and liblustre never calls obd_set_async_flags(). I hope.), generic
2686 * implementation has to handle case where OST-locked page was picked
2687 * up by, e.g., ->writepage().
2689 LASSERT(!(oap->oap_brw_flags & OBD_BRW_SRVLOCK));
2690 LASSERT(!LIBLUSTRE_CLIENT); /* check that liblustre angels do fear to
2693 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2697 loi = lsm->lsm_oinfo[0];
2699 if (oap->oap_cmd & OBD_BRW_WRITE) {
2700 lop = &loi->loi_write_lop;
2702 lop = &loi->loi_read_lop;
2705 client_obd_list_lock(&cli->cl_loi_list_lock);
2707 if (list_empty(&oap->oap_pending_item))
2708 GOTO(out, rc = -EINVAL);
2710 if ((oap->oap_async_flags & async_flags) == async_flags)
2713 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2714 oap->oap_async_flags |= ASYNC_READY;
2716 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT)) {
2717 if (list_empty(&oap->oap_rpc_item)) {
2718 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2719 loi_list_maint(cli, loi);
2723 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2724 oap->oap_async_flags);
2726 osc_check_rpcs(cli);
2727 client_obd_list_unlock(&cli->cl_loi_list_lock);
2731 static int osc_queue_group_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2732 struct lov_oinfo *loi,
2733 struct obd_io_group *oig, void *cookie,
2734 int cmd, obd_off off, int count,
2736 obd_flag async_flags)
2738 struct client_obd *cli = &exp->exp_obd->u.cli;
2739 struct osc_async_page *oap;
2740 struct loi_oap_pages *lop;
2744 oap = oap_from_cookie(cookie);
2746 RETURN(PTR_ERR(oap));
2748 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2751 if (!list_empty(&oap->oap_pending_item) ||
2752 !list_empty(&oap->oap_urgent_item) ||
2753 !list_empty(&oap->oap_rpc_item))
2757 loi = lsm->lsm_oinfo[0];
2759 client_obd_list_lock(&cli->cl_loi_list_lock);
2762 oap->oap_page_off = off;
2763 oap->oap_count = count;
2764 oap->oap_brw_flags = brw_flags;
2765 oap->oap_async_flags = async_flags;
2767 if (cmd & OBD_BRW_WRITE)
2768 lop = &loi->loi_write_lop;
2770 lop = &loi->loi_read_lop;
2772 list_add_tail(&oap->oap_pending_item, &lop->lop_pending_group);
2773 if (oap->oap_async_flags & ASYNC_GROUP_SYNC) {
2775 rc = oig_add_one(oig, &oap->oap_occ);
2778 LOI_DEBUG(loi, "oap %p page %p on group pending: rc %d\n",
2779 oap, oap->oap_page, rc);
2781 client_obd_list_unlock(&cli->cl_loi_list_lock);
2786 static void osc_group_to_pending(struct client_obd *cli, struct lov_oinfo *loi,
2787 struct loi_oap_pages *lop, int cmd)
2789 struct list_head *pos, *tmp;
2790 struct osc_async_page *oap;
2792 list_for_each_safe(pos, tmp, &lop->lop_pending_group) {
2793 oap = list_entry(pos, struct osc_async_page, oap_pending_item);
2794 list_del(&oap->oap_pending_item);
2795 osc_oap_to_pending(oap);
2797 loi_list_maint(cli, loi);
2800 static int osc_trigger_group_io(struct obd_export *exp,
2801 struct lov_stripe_md *lsm,
2802 struct lov_oinfo *loi,
2803 struct obd_io_group *oig)
2805 struct client_obd *cli = &exp->exp_obd->u.cli;
2809 loi = lsm->lsm_oinfo[0];
2811 client_obd_list_lock(&cli->cl_loi_list_lock);
2813 osc_group_to_pending(cli, loi, &loi->loi_write_lop, OBD_BRW_WRITE);
2814 osc_group_to_pending(cli, loi, &loi->loi_read_lop, OBD_BRW_READ);
2816 osc_check_rpcs(cli);
2817 client_obd_list_unlock(&cli->cl_loi_list_lock);
2822 static int osc_teardown_async_page(struct obd_export *exp,
2823 struct lov_stripe_md *lsm,
2824 struct lov_oinfo *loi, void *cookie)
2826 struct client_obd *cli = &exp->exp_obd->u.cli;
2827 struct loi_oap_pages *lop;
2828 struct osc_async_page *oap;
2832 oap = oap_from_cookie(cookie);
2834 RETURN(PTR_ERR(oap));
2837 loi = lsm->lsm_oinfo[0];
2839 if (oap->oap_cmd & OBD_BRW_WRITE) {
2840 lop = &loi->loi_write_lop;
2842 lop = &loi->loi_read_lop;
2845 client_obd_list_lock(&cli->cl_loi_list_lock);
2847 if (!list_empty(&oap->oap_rpc_item))
2848 GOTO(out, rc = -EBUSY);
2850 osc_exit_cache(cli, oap, 0);
2851 osc_wake_cache_waiters(cli);
2853 if (!list_empty(&oap->oap_urgent_item)) {
2854 list_del_init(&oap->oap_urgent_item);
2855 oap->oap_async_flags &= ~ASYNC_URGENT;
2857 if (!list_empty(&oap->oap_pending_item)) {
2858 list_del_init(&oap->oap_pending_item);
2859 lop_update_pending(cli, lop, oap->oap_cmd, -1);
2861 loi_list_maint(cli, loi);
2863 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
2865 client_obd_list_unlock(&cli->cl_loi_list_lock);
2869 static void osc_set_data_with_check(struct lustre_handle *lockh, void *data,
2872 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2875 CERROR("lockh %p, data %p - client evicted?\n", lockh, data);
2878 lock_res_and_lock(lock);
2879 #if defined (__KERNEL__) && defined (__linux__)
2880 /* Liang XXX: Darwin and Winnt checking should be added */
2881 if (lock->l_ast_data && lock->l_ast_data != data) {
2882 struct inode *new_inode = data;
2883 struct inode *old_inode = lock->l_ast_data;
2884 if (!(old_inode->i_state & I_FREEING))
2885 LDLM_ERROR(lock, "inconsistent l_ast_data found");
2886 LASSERTF(old_inode->i_state & I_FREEING,
2887 "Found existing inode %p/%lu/%u state %lu in lock: "
2888 "setting data to %p/%lu/%u\n", old_inode,
2889 old_inode->i_ino, old_inode->i_generation,
2891 new_inode, new_inode->i_ino, new_inode->i_generation);
2894 lock->l_ast_data = data;
2895 lock->l_flags |= (flags & LDLM_FL_NO_LRU);
2896 unlock_res_and_lock(lock);
2897 LDLM_LOCK_PUT(lock);
2900 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2901 ldlm_iterator_t replace, void *data)
2903 struct ldlm_res_id res_id = { .name = {0} };
2904 struct obd_device *obd = class_exp2obd(exp);
2906 res_id.name[0] = lsm->lsm_object_id;
2907 res_id.name[2] = lsm->lsm_object_gr;
2909 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2913 static int osc_enqueue_fini(struct ptlrpc_request *req, struct obd_info *oinfo,
2919 /* The request was created before ldlm_cli_enqueue call. */
2920 if (rc == ELDLM_LOCK_ABORTED) {
2921 struct ldlm_reply *rep;
2922 rep = req_capsule_server_get(&req->rq_pill,
2925 LASSERT(rep != NULL);
2926 if (rep->lock_policy_res1)
2927 rc = rep->lock_policy_res1;
2931 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
2932 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
2933 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_size,
2934 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_blocks,
2935 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_mtime);
2938 /* Call the update callback. */
2939 rc = oinfo->oi_cb_up(oinfo, rc);
2943 static int osc_enqueue_interpret(struct ptlrpc_request *req,
2944 struct osc_enqueue_args *aa, int rc)
2946 int intent = aa->oa_oi->oi_flags & LDLM_FL_HAS_INTENT;
2947 struct lov_stripe_md *lsm = aa->oa_oi->oi_md;
2948 struct ldlm_lock *lock;
2950 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2952 lock = ldlm_handle2lock(aa->oa_oi->oi_lockh);
2954 /* Complete obtaining the lock procedure. */
2955 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
2957 &aa->oa_oi->oi_flags,
2958 &lsm->lsm_oinfo[0]->loi_lvb,
2959 sizeof(lsm->lsm_oinfo[0]->loi_lvb),
2960 lustre_swab_ost_lvb,
2961 aa->oa_oi->oi_lockh, rc);
2963 /* Complete osc stuff. */
2964 rc = osc_enqueue_fini(req, aa->oa_oi, intent, rc);
2966 /* Release the lock for async request. */
2967 if (lustre_handle_is_used(aa->oa_oi->oi_lockh) && rc == ELDLM_OK)
2968 ldlm_lock_decref(aa->oa_oi->oi_lockh, aa->oa_ei->ei_mode);
2970 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
2971 aa->oa_oi->oi_lockh, req, aa);
2972 LDLM_LOCK_PUT(lock);
2976 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2977 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2978 * other synchronous requests, however keeping some locks and trying to obtain
2979 * others may take a considerable amount of time in a case of ost failure; and
2980 * when other sync requests do not get released lock from a client, the client
2981 * is excluded from the cluster -- such scenarious make the life difficult, so
2982 * release locks just after they are obtained. */
2983 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
2984 struct ldlm_enqueue_info *einfo,
2985 struct ptlrpc_request_set *rqset)
2987 struct ldlm_res_id res_id = { .name = {0} };
2988 struct obd_device *obd = exp->exp_obd;
2989 struct ptlrpc_request *req = NULL;
2990 int intent = oinfo->oi_flags & LDLM_FL_HAS_INTENT;
2995 res_id.name[0] = oinfo->oi_md->lsm_object_id;
2996 res_id.name[2] = oinfo->oi_md->lsm_object_gr;
2998 /* Filesystem lock extents are extended to page boundaries so that
2999 * dealing with the page cache is a little smoother. */
3000 oinfo->oi_policy.l_extent.start -=
3001 oinfo->oi_policy.l_extent.start & ~CFS_PAGE_MASK;
3002 oinfo->oi_policy.l_extent.end |= ~CFS_PAGE_MASK;
3004 if (oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid == 0)
3007 /* Next, search for already existing extent locks that will cover us */
3008 /* If we're trying to read, we also search for an existing PW lock. The
3009 * VFS and page cache already protect us locally, so lots of readers/
3010 * writers can share a single PW lock.
3012 * There are problems with conversion deadlocks, so instead of
3013 * converting a read lock to a write lock, we'll just enqueue a new
3016 * At some point we should cancel the read lock instead of making them
3017 * send us a blocking callback, but there are problems with canceling
3018 * locks out from other users right now, too. */
3019 mode = einfo->ei_mode;
3020 if (einfo->ei_mode == LCK_PR)
3022 mode = ldlm_lock_match(obd->obd_namespace,
3023 oinfo->oi_flags | LDLM_FL_LVB_READY, &res_id,
3024 einfo->ei_type, &oinfo->oi_policy, mode,
3027 /* addref the lock only if not async requests and PW lock is
3028 * matched whereas we asked for PR. */
3029 if (!rqset && einfo->ei_mode != mode)
3030 ldlm_lock_addref(oinfo->oi_lockh, LCK_PR);
3031 osc_set_data_with_check(oinfo->oi_lockh, einfo->ei_cbdata,
3034 /* I would like to be able to ASSERT here that rss <=
3035 * kms, but I can't, for reasons which are explained in
3039 /* We already have a lock, and it's referenced */
3040 oinfo->oi_cb_up(oinfo, ELDLM_OK);
3042 /* For async requests, decref the lock. */
3043 if (einfo->ei_mode != mode)
3044 ldlm_lock_decref(oinfo->oi_lockh, LCK_PW);
3046 ldlm_lock_decref(oinfo->oi_lockh, einfo->ei_mode);
3053 CFS_LIST_HEAD(cancels);
3054 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3055 &RQF_LDLM_ENQUEUE_LVB);
3059 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3063 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3064 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb));
3065 ptlrpc_request_set_replen(req);
3068 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3069 oinfo->oi_flags &= ~LDLM_FL_BLOCK_GRANTED;
3071 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id,
3072 &oinfo->oi_policy, &oinfo->oi_flags,
3073 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3074 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb),
3075 lustre_swab_ost_lvb, oinfo->oi_lockh,
3079 struct osc_enqueue_args *aa;
3080 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3081 aa = (struct osc_enqueue_args *)&req->rq_async_args;
3086 req->rq_interpret_reply = osc_enqueue_interpret;
3087 ptlrpc_set_add_req(rqset, req);
3088 } else if (intent) {
3089 ptlrpc_req_finished(req);
3094 rc = osc_enqueue_fini(req, oinfo, intent, rc);
3096 ptlrpc_req_finished(req);
3101 static int osc_match(struct obd_export *exp, struct lov_stripe_md *lsm,
3102 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3103 int *flags, void *data, struct lustre_handle *lockh)
3105 struct ldlm_res_id res_id = { .name = {0} };
3106 struct obd_device *obd = exp->exp_obd;
3107 int lflags = *flags;
3111 res_id.name[0] = lsm->lsm_object_id;
3112 res_id.name[2] = lsm->lsm_object_gr;
3114 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3117 /* Filesystem lock extents are extended to page boundaries so that
3118 * dealing with the page cache is a little smoother */
3119 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3120 policy->l_extent.end |= ~CFS_PAGE_MASK;
3122 /* Next, search for already existing extent locks that will cover us */
3123 /* If we're trying to read, we also search for an existing PW lock. The
3124 * VFS and page cache already protect us locally, so lots of readers/
3125 * writers can share a single PW lock. */
3129 rc = ldlm_lock_match(obd->obd_namespace, lflags | LDLM_FL_LVB_READY,
3130 &res_id, type, policy, rc, lockh);
3132 osc_set_data_with_check(lockh, data, lflags);
3133 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3134 ldlm_lock_addref(lockh, LCK_PR);
3135 ldlm_lock_decref(lockh, LCK_PW);
3142 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3143 __u32 mode, struct lustre_handle *lockh)
3147 if (unlikely(mode == LCK_GROUP))
3148 ldlm_lock_decref_and_cancel(lockh, mode);
3150 ldlm_lock_decref(lockh, mode);
3155 static int osc_cancel_unused(struct obd_export *exp,
3156 struct lov_stripe_md *lsm, int flags,
3159 struct obd_device *obd = class_exp2obd(exp);
3160 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3163 res_id.name[0] = lsm->lsm_object_id;
3164 res_id.name[2] = lsm->lsm_object_gr;
3168 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3171 static int osc_join_lru(struct obd_export *exp,
3172 struct lov_stripe_md *lsm, int join)
3174 struct obd_device *obd = class_exp2obd(exp);
3175 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3178 res_id.name[0] = lsm->lsm_object_id;
3179 res_id.name[2] = lsm->lsm_object_gr;
3183 return ldlm_cli_join_lru(obd->obd_namespace, resp, join);
3186 static int osc_statfs_interpret(struct ptlrpc_request *req,
3187 struct osc_async_args *aa, int rc)
3189 struct obd_statfs *msfs;
3195 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3197 GOTO(out, rc = -EPROTO);
3200 *aa->aa_oi->oi_osfs = *msfs;
3202 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3206 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3207 __u64 max_age, struct ptlrpc_request_set *rqset)
3209 struct ptlrpc_request *req;
3210 struct osc_async_args *aa;
3214 /* We could possibly pass max_age in the request (as an absolute
3215 * timestamp or a "seconds.usec ago") so the target can avoid doing
3216 * extra calls into the filesystem if that isn't necessary (e.g.
3217 * during mount that would help a bit). Having relative timestamps
3218 * is not so great if request processing is slow, while absolute
3219 * timestamps are not ideal because they need time synchronization. */
3220 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3224 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3226 ptlrpc_request_free(req);
3229 ptlrpc_request_set_replen(req);
3230 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3231 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3232 /* procfs requests not want stat in wait for avoid deadlock */
3233 req->rq_no_resend = 1;
3234 req->rq_no_delay = 1;
3237 req->rq_interpret_reply = osc_statfs_interpret;
3238 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3239 aa = (struct osc_async_args *)&req->rq_async_args;
3242 ptlrpc_set_add_req(rqset, req);
3246 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3247 __u64 max_age, __u32 flags)
3249 struct obd_statfs *msfs;
3250 struct ptlrpc_request *req;
3254 /* We could possibly pass max_age in the request (as an absolute
3255 * timestamp or a "seconds.usec ago") so the target can avoid doing
3256 * extra calls into the filesystem if that isn't necessary (e.g.
3257 * during mount that would help a bit). Having relative timestamps
3258 * is not so great if request processing is slow, while absolute
3259 * timestamps are not ideal because they need time synchronization. */
3260 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3264 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3266 ptlrpc_request_free(req);
3269 ptlrpc_request_set_replen(req);
3270 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3272 if (flags & OBD_STATFS_NODELAY) {
3273 /* procfs requests not want stat in wait for avoid deadlock */
3274 req->rq_no_resend = 1;
3275 req->rq_no_delay = 1;
3278 rc = ptlrpc_queue_wait(req);
3282 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3284 GOTO(out, rc = -EPROTO);
3291 ptlrpc_req_finished(req);
3295 /* Retrieve object striping information.
3297 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3298 * the maximum number of OST indices which will fit in the user buffer.
3299 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3301 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3303 struct lov_user_md lum, *lumk;
3304 int rc = 0, lum_size;
3310 if (copy_from_user(&lum, lump, sizeof(lum)))
3313 if (lum.lmm_magic != LOV_USER_MAGIC)
3316 if (lum.lmm_stripe_count > 0) {
3317 lum_size = sizeof(lum) + sizeof(lum.lmm_objects[0]);
3318 OBD_ALLOC(lumk, lum_size);
3322 lumk->lmm_objects[0].l_object_id = lsm->lsm_object_id;
3323 lumk->lmm_objects[0].l_object_gr = lsm->lsm_object_gr;
3325 lum_size = sizeof(lum);
3329 lumk->lmm_object_id = lsm->lsm_object_id;
3330 lumk->lmm_object_gr = lsm->lsm_object_gr;
3331 lumk->lmm_stripe_count = 1;
3333 if (copy_to_user(lump, lumk, lum_size))
3337 OBD_FREE(lumk, lum_size);
3343 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3344 void *karg, void *uarg)
3346 struct obd_device *obd = exp->exp_obd;
3347 struct obd_ioctl_data *data = karg;
3351 if (!try_module_get(THIS_MODULE)) {
3352 CERROR("Can't get module. Is it alive?");
3356 case OBD_IOC_LOV_GET_CONFIG: {
3358 struct lov_desc *desc;
3359 struct obd_uuid uuid;
3363 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3364 GOTO(out, err = -EINVAL);
3366 data = (struct obd_ioctl_data *)buf;
3368 if (sizeof(*desc) > data->ioc_inllen1) {
3369 obd_ioctl_freedata(buf, len);
3370 GOTO(out, err = -EINVAL);
3373 if (data->ioc_inllen2 < sizeof(uuid)) {
3374 obd_ioctl_freedata(buf, len);
3375 GOTO(out, err = -EINVAL);
3378 desc = (struct lov_desc *)data->ioc_inlbuf1;
3379 desc->ld_tgt_count = 1;
3380 desc->ld_active_tgt_count = 1;
3381 desc->ld_default_stripe_count = 1;
3382 desc->ld_default_stripe_size = 0;
3383 desc->ld_default_stripe_offset = 0;
3384 desc->ld_pattern = 0;
3385 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3387 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3389 err = copy_to_user((void *)uarg, buf, len);
3392 obd_ioctl_freedata(buf, len);
3395 case LL_IOC_LOV_SETSTRIPE:
3396 err = obd_alloc_memmd(exp, karg);
3400 case LL_IOC_LOV_GETSTRIPE:
3401 err = osc_getstripe(karg, uarg);
3403 case OBD_IOC_CLIENT_RECOVER:
3404 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3409 case IOC_OSC_SET_ACTIVE:
3410 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3413 case OBD_IOC_POLL_QUOTACHECK:
3414 err = lquota_poll_check(quota_interface, exp,
3415 (struct if_quotacheck *)karg);
3418 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3419 cmd, cfs_curproc_comm());
3420 GOTO(out, err = -ENOTTY);
3423 module_put(THIS_MODULE);
3427 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3428 void *key, __u32 *vallen, void *val)
3431 if (!vallen || !val)
3434 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3435 __u32 *stripe = val;
3436 *vallen = sizeof(*stripe);
3439 } else if (KEY_IS(KEY_LAST_ID)) {
3440 struct ptlrpc_request *req;
3445 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3446 &RQF_OST_GET_INFO_LAST_ID);
3450 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3451 RCL_CLIENT, keylen);
3452 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3454 ptlrpc_request_free(req);
3458 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3459 memcpy(tmp, key, keylen);
3461 ptlrpc_request_set_replen(req);
3462 rc = ptlrpc_queue_wait(req);
3466 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3468 GOTO(out, rc = -EPROTO);
3470 *((obd_id *)val) = *reply;
3472 ptlrpc_req_finished(req);
3478 static int osc_setinfo_mds_conn_interpret(struct ptlrpc_request *req,
3481 struct llog_ctxt *ctxt;
3482 struct obd_import *imp = req->rq_import;
3488 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3491 rc = llog_initiator_connect(ctxt);
3493 CERROR("cannot establish connection for "
3494 "ctxt %p: %d\n", ctxt, rc);
3497 llog_ctxt_put(ctxt);
3498 spin_lock(&imp->imp_lock);
3499 imp->imp_server_timeout = 1;
3500 imp->imp_pingable = 1;
3501 spin_unlock(&imp->imp_lock);
3502 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3507 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3508 void *key, obd_count vallen, void *val,
3509 struct ptlrpc_request_set *set)
3511 struct ptlrpc_request *req;
3512 struct obd_device *obd = exp->exp_obd;
3513 struct obd_import *imp = class_exp2cliimp(exp);
3518 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3520 if (KEY_IS(KEY_NEXT_ID)) {
3521 if (vallen != sizeof(obd_id))
3525 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3526 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3527 exp->exp_obd->obd_name,
3528 obd->u.cli.cl_oscc.oscc_next_id);
3533 if (KEY_IS("unlinked")) {
3534 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3535 spin_lock(&oscc->oscc_lock);
3536 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3537 spin_unlock(&oscc->oscc_lock);
3541 if (KEY_IS(KEY_INIT_RECOV)) {
3542 if (vallen != sizeof(int))
3544 spin_lock(&imp->imp_lock);
3545 imp->imp_initial_recov = *(int *)val;
3546 spin_unlock(&imp->imp_lock);
3547 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3548 exp->exp_obd->obd_name,
3549 imp->imp_initial_recov);
3553 if (KEY_IS("checksum")) {
3554 if (vallen != sizeof(int))
3556 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3560 if (KEY_IS(KEY_FLUSH_CTX)) {
3561 sptlrpc_import_flush_my_ctx(imp);
3568 /* We pass all other commands directly to OST. Since nobody calls osc
3569 methods directly and everybody is supposed to go through LOV, we
3570 assume lov checked invalid values for us.
3571 The only recognised values so far are evict_by_nid and mds_conn.
3572 Even if something bad goes through, we'd get a -EINVAL from OST
3576 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_INFO);
3580 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3581 RCL_CLIENT, keylen);
3582 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3583 RCL_CLIENT, vallen);
3584 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3586 ptlrpc_request_free(req);
3590 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3591 memcpy(tmp, key, keylen);
3592 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
3593 memcpy(tmp, val, vallen);
3595 if (KEY_IS(KEY_MDS_CONN)) {
3596 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3598 oscc->oscc_oa.o_gr = (*(__u32 *)val);
3599 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
3600 LASSERT(oscc->oscc_oa.o_gr > 0);
3601 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3604 ptlrpc_request_set_replen(req);
3605 ptlrpc_set_add_req(set, req);
3606 ptlrpc_check_set(set);
3612 static struct llog_operations osc_size_repl_logops = {
3613 lop_cancel: llog_obd_repl_cancel
3616 static struct llog_operations osc_mds_ost_orig_logops;
3617 static int osc_llog_init(struct obd_device *obd, int group,
3618 struct obd_device *tgt, int count,
3619 struct llog_catid *catid, struct obd_uuid *uuid)
3623 LASSERT(group == OBD_LLOG_GROUP);
3624 spin_lock(&obd->obd_dev_lock);
3625 if (osc_mds_ost_orig_logops.lop_setup != llog_obd_origin_setup) {
3626 osc_mds_ost_orig_logops = llog_lvfs_ops;
3627 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
3628 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
3629 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
3630 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
3632 spin_unlock(&obd->obd_dev_lock);
3634 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, count,
3635 &catid->lci_logid, &osc_mds_ost_orig_logops);
3637 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
3641 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, count,
3642 NULL, &osc_size_repl_logops);
3644 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
3647 CERROR("osc '%s' tgt '%s' cnt %d catid %p rc=%d\n",
3648 obd->obd_name, tgt->obd_name, count, catid, rc);
3649 CERROR("logid "LPX64":0x%x\n",
3650 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
3655 static int osc_llog_finish(struct obd_device *obd, int count)
3657 struct llog_ctxt *ctxt;
3658 int rc = 0, rc2 = 0;
3661 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3663 rc = llog_cleanup(ctxt);
3665 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3667 rc2 = llog_cleanup(ctxt);
3674 static int osc_reconnect(const struct lu_env *env,
3675 struct obd_export *exp, struct obd_device *obd,
3676 struct obd_uuid *cluuid,
3677 struct obd_connect_data *data)
3679 struct client_obd *cli = &obd->u.cli;
3681 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3684 client_obd_list_lock(&cli->cl_loi_list_lock);
3685 data->ocd_grant = cli->cl_avail_grant ?:
3686 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
3687 lost_grant = cli->cl_lost_grant;
3688 cli->cl_lost_grant = 0;
3689 client_obd_list_unlock(&cli->cl_loi_list_lock);
3691 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
3692 "cl_lost_grant: %ld\n", data->ocd_grant,
3693 cli->cl_avail_grant, lost_grant);
3694 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
3695 " ocd_grant: %d\n", data->ocd_connect_flags,
3696 data->ocd_version, data->ocd_grant);
3702 static int osc_disconnect(struct obd_export *exp)
3704 struct obd_device *obd = class_exp2obd(exp);
3705 struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3708 if (obd->u.cli.cl_conn_count == 1)
3709 /* flush any remaining cancel messages out to the target */
3710 llog_sync(ctxt, exp);
3712 llog_ctxt_put(ctxt);
3714 rc = client_disconnect_export(exp);
3718 static int osc_import_event(struct obd_device *obd,
3719 struct obd_import *imp,
3720 enum obd_import_event event)
3722 struct client_obd *cli;
3726 LASSERT(imp->imp_obd == obd);
3729 case IMP_EVENT_DISCON: {
3730 /* Only do this on the MDS OSC's */
3731 if (imp->imp_server_timeout) {
3732 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3734 spin_lock(&oscc->oscc_lock);
3735 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
3736 spin_unlock(&oscc->oscc_lock);
3739 client_obd_list_lock(&cli->cl_loi_list_lock);
3740 cli->cl_avail_grant = 0;
3741 cli->cl_lost_grant = 0;
3742 client_obd_list_unlock(&cli->cl_loi_list_lock);
3745 case IMP_EVENT_INACTIVE: {
3746 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
3749 case IMP_EVENT_INVALIDATE: {
3750 struct ldlm_namespace *ns = obd->obd_namespace;
3754 client_obd_list_lock(&cli->cl_loi_list_lock);
3755 /* all pages go to failing rpcs due to the invalid import */
3756 osc_check_rpcs(cli);
3757 client_obd_list_unlock(&cli->cl_loi_list_lock);
3759 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3763 case IMP_EVENT_ACTIVE: {
3764 /* Only do this on the MDS OSC's */
3765 if (imp->imp_server_timeout) {
3766 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3768 spin_lock(&oscc->oscc_lock);
3769 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3770 spin_unlock(&oscc->oscc_lock);
3772 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3775 case IMP_EVENT_OCD: {
3776 struct obd_connect_data *ocd = &imp->imp_connect_data;
3778 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3779 osc_init_grant(&obd->u.cli, ocd);
3782 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3783 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3785 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3789 CERROR("Unknown import event %d\n", event);
3795 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3801 rc = ptlrpcd_addref();
3805 rc = client_obd_setup(obd, lcfg);
3809 struct lprocfs_static_vars lvars = { 0 };
3810 struct client_obd *cli = &obd->u.cli;
3812 lprocfs_osc_init_vars(&lvars);
3813 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
3814 lproc_osc_attach_seqstat(obd);
3815 sptlrpc_lprocfs_cliobd_attach(obd);
3816 ptlrpc_lprocfs_register_obd(obd);
3820 /* We need to allocate a few requests more, because
3821 brw_interpret_oap tries to create new requests before freeing
3822 previous ones. Ideally we want to have 2x max_rpcs_in_flight
3823 reserved, but I afraid that might be too much wasted RAM
3824 in fact, so 2 is just my guess and still should work. */
3825 cli->cl_import->imp_rq_pool =
3826 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3828 ptlrpc_add_rqs_to_pool);
3834 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3840 case OBD_CLEANUP_EARLY: {
3841 struct obd_import *imp;
3842 imp = obd->u.cli.cl_import;
3843 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3844 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3845 ptlrpc_deactivate_import(imp);
3846 spin_lock(&imp->imp_lock);
3847 imp->imp_pingable = 0;
3848 spin_unlock(&imp->imp_lock);
3851 case OBD_CLEANUP_EXPORTS: {
3852 /* If we set up but never connected, the
3853 client import will not have been cleaned. */
3854 if (obd->u.cli.cl_import) {
3855 struct obd_import *imp;
3856 imp = obd->u.cli.cl_import;
3857 CDEBUG(D_CONFIG, "%s: client import never connected\n",
3859 ptlrpc_invalidate_import(imp);
3860 ptlrpc_free_rq_pool(imp->imp_rq_pool);
3861 class_destroy_import(imp);
3862 obd->u.cli.cl_import = NULL;
3866 case OBD_CLEANUP_SELF_EXP:
3867 rc = obd_llog_finish(obd, 0);
3869 CERROR("failed to cleanup llogging subsystems\n");
3871 case OBD_CLEANUP_OBD:
3877 int osc_cleanup(struct obd_device *obd)
3879 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3883 ptlrpc_lprocfs_unregister_obd(obd);
3884 lprocfs_obd_cleanup(obd);
3886 spin_lock(&oscc->oscc_lock);
3887 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
3888 oscc->oscc_flags |= OSCC_FLAG_EXITING;
3889 spin_unlock(&oscc->oscc_lock);
3891 /* free memory of osc quota cache */
3892 lquota_cleanup(quota_interface, obd);
3894 rc = client_obd_cleanup(obd);
3900 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
3902 struct lustre_cfg *lcfg = buf;
3903 struct lprocfs_static_vars lvars = { 0 };
3906 lprocfs_osc_init_vars(&lvars);
3908 switch (lcfg->lcfg_command) {
3909 case LCFG_SPTLRPC_CONF:
3910 rc = sptlrpc_cliobd_process_config(obd, lcfg);
3913 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
3921 struct obd_ops osc_obd_ops = {
3922 .o_owner = THIS_MODULE,
3923 .o_setup = osc_setup,
3924 .o_precleanup = osc_precleanup,
3925 .o_cleanup = osc_cleanup,
3926 .o_add_conn = client_import_add_conn,
3927 .o_del_conn = client_import_del_conn,
3928 .o_connect = client_connect_import,
3929 .o_reconnect = osc_reconnect,
3930 .o_disconnect = osc_disconnect,
3931 .o_statfs = osc_statfs,
3932 .o_statfs_async = osc_statfs_async,
3933 .o_packmd = osc_packmd,
3934 .o_unpackmd = osc_unpackmd,
3935 .o_precreate = osc_precreate,
3936 .o_create = osc_create,
3937 .o_destroy = osc_destroy,
3938 .o_getattr = osc_getattr,
3939 .o_getattr_async = osc_getattr_async,
3940 .o_setattr = osc_setattr,
3941 .o_setattr_async = osc_setattr_async,
3943 .o_brw_async = osc_brw_async,
3944 .o_prep_async_page = osc_prep_async_page,
3945 .o_queue_async_io = osc_queue_async_io,
3946 .o_set_async_flags = osc_set_async_flags,
3947 .o_queue_group_io = osc_queue_group_io,
3948 .o_trigger_group_io = osc_trigger_group_io,
3949 .o_teardown_async_page = osc_teardown_async_page,
3950 .o_punch = osc_punch,
3952 .o_enqueue = osc_enqueue,
3953 .o_match = osc_match,
3954 .o_change_cbdata = osc_change_cbdata,
3955 .o_cancel = osc_cancel,
3956 .o_cancel_unused = osc_cancel_unused,
3957 .o_join_lru = osc_join_lru,
3958 .o_iocontrol = osc_iocontrol,
3959 .o_get_info = osc_get_info,
3960 .o_set_info_async = osc_set_info_async,
3961 .o_import_event = osc_import_event,
3962 .o_llog_init = osc_llog_init,
3963 .o_llog_finish = osc_llog_finish,
3964 .o_process_config = osc_process_config,
3966 int __init osc_init(void)
3968 struct lprocfs_static_vars lvars = { 0 };
3972 lprocfs_osc_init_vars(&lvars);
3974 request_module("lquota");
3975 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
3976 lquota_init(quota_interface);
3977 init_obd_quota_ops(quota_interface, &osc_obd_ops);
3979 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
3980 LUSTRE_OSC_NAME, NULL);
3982 if (quota_interface)
3983 PORTAL_SYMBOL_PUT(osc_quota_interface);
3991 static void /*__exit*/ osc_exit(void)
3993 lquota_exit(quota_interface);
3994 if (quota_interface)
3995 PORTAL_SYMBOL_PUT(osc_quota_interface);
3997 class_unregister_type(LUSTRE_OSC_NAME);
4000 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
4001 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4002 MODULE_LICENSE("GPL");
4004 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);