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 <lustre_cache.h>
61 #include "osc_internal.h"
63 static quota_interface_t *quota_interface = NULL;
64 extern quota_interface_t osc_quota_interface;
66 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
67 int osc_cleanup(struct obd_device *obd);
69 /* Pack OSC object metadata for disk storage (LE byte order). */
70 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
71 struct lov_stripe_md *lsm)
76 lmm_size = sizeof(**lmmp);
81 OBD_FREE(*lmmp, lmm_size);
87 OBD_ALLOC(*lmmp, lmm_size);
93 LASSERT(lsm->lsm_object_id);
94 LASSERT(lsm->lsm_object_gr);
95 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
96 (*lmmp)->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
102 /* Unpack OSC object metadata from disk storage (LE byte order). */
103 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
104 struct lov_mds_md *lmm, int lmm_bytes)
110 if (lmm_bytes < sizeof (*lmm)) {
111 CERROR("lov_mds_md too small: %d, need %d\n",
112 lmm_bytes, (int)sizeof(*lmm));
115 /* XXX LOV_MAGIC etc check? */
117 if (lmm->lmm_object_id == 0) {
118 CERROR("lov_mds_md: zero lmm_object_id\n");
123 lsm_size = lov_stripe_md_size(1);
127 if (*lsmp != NULL && lmm == NULL) {
128 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
129 OBD_FREE(*lsmp, lsm_size);
135 OBD_ALLOC(*lsmp, lsm_size);
138 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
139 if ((*lsmp)->lsm_oinfo[0] == NULL) {
140 OBD_FREE(*lsmp, lsm_size);
143 loi_init((*lsmp)->lsm_oinfo[0]);
147 /* XXX zero *lsmp? */
148 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
149 (*lsmp)->lsm_object_gr = le64_to_cpu (lmm->lmm_object_gr);
150 LASSERT((*lsmp)->lsm_object_id);
151 LASSERT((*lsmp)->lsm_object_gr);
154 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
159 static inline void osc_pack_capa(struct ptlrpc_request *req,
160 struct ost_body *body, void *capa)
162 struct obd_capa *oc = (struct obd_capa *)capa;
163 struct lustre_capa *c;
168 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
171 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
172 DEBUG_CAPA(D_SEC, c, "pack");
175 static inline void osc_pack_req_body(struct ptlrpc_request *req,
176 struct obd_info *oinfo)
178 struct ost_body *body;
180 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
183 body->oa = *oinfo->oi_oa;
184 osc_pack_capa(req, body, oinfo->oi_capa);
187 static inline void osc_set_capa_size(struct ptlrpc_request *req,
188 const struct req_msg_field *field,
192 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
194 /* it is already calculated as sizeof struct obd_capa */
198 static int osc_getattr_interpret(struct ptlrpc_request *req,
199 struct osc_async_args *aa, int rc)
201 struct ost_body *body;
207 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
208 lustre_swab_ost_body);
210 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
211 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
213 /* This should really be sent by the OST */
214 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
215 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
217 CDEBUG(D_INFO, "can't unpack ost_body\n");
219 aa->aa_oi->oi_oa->o_valid = 0;
222 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
226 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
227 struct ptlrpc_request_set *set)
229 struct ptlrpc_request *req;
230 struct osc_async_args *aa;
234 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
238 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
239 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
241 ptlrpc_request_free(req);
245 osc_pack_req_body(req, oinfo);
247 ptlrpc_request_set_replen(req);
248 req->rq_interpret_reply = osc_getattr_interpret;
250 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
251 aa = (struct osc_async_args *)&req->rq_async_args;
254 ptlrpc_set_add_req(set, req);
258 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
260 struct ptlrpc_request *req;
261 struct ost_body *body;
265 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
269 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
270 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
272 ptlrpc_request_free(req);
276 osc_pack_req_body(req, oinfo);
278 ptlrpc_request_set_replen(req);
280 rc = ptlrpc_queue_wait(req);
284 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
286 GOTO(out, rc = -EPROTO);
288 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
289 *oinfo->oi_oa = body->oa;
291 /* This should really be sent by the OST */
292 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
293 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
297 ptlrpc_req_finished(req);
301 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
302 struct obd_trans_info *oti)
304 struct ptlrpc_request *req;
305 struct ost_body *body;
309 LASSERT(!(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP) ||
310 oinfo->oi_oa->o_gr > 0);
312 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
316 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
317 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
319 ptlrpc_request_free(req);
323 osc_pack_req_body(req, oinfo);
325 ptlrpc_request_set_replen(req);
328 rc = ptlrpc_queue_wait(req);
332 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
334 GOTO(out, rc = -EPROTO);
336 *oinfo->oi_oa = body->oa;
340 ptlrpc_req_finished(req);
344 static int osc_setattr_interpret(struct ptlrpc_request *req,
345 struct osc_async_args *aa, int rc)
347 struct ost_body *body;
353 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
355 GOTO(out, rc = -EPROTO);
357 *aa->aa_oi->oi_oa = body->oa;
359 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
363 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
364 struct obd_trans_info *oti,
365 struct ptlrpc_request_set *rqset)
367 struct ptlrpc_request *req;
368 struct osc_async_args *aa;
372 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
376 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
377 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
379 ptlrpc_request_free(req);
383 osc_pack_req_body(req, oinfo);
385 ptlrpc_request_set_replen(req);
387 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
389 *obdo_logcookie(oinfo->oi_oa) = *oti->oti_logcookies;
392 /* do mds to ost setattr asynchronouly */
394 /* Do not wait for response. */
395 ptlrpcd_add_req(req);
397 req->rq_interpret_reply = osc_setattr_interpret;
399 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
400 aa = (struct osc_async_args *)&req->rq_async_args;
403 ptlrpc_set_add_req(rqset, req);
409 int osc_real_create(struct obd_export *exp, struct obdo *oa,
410 struct lov_stripe_md **ea, struct obd_trans_info *oti)
412 struct ptlrpc_request *req;
413 struct ost_body *body;
414 struct lov_stripe_md *lsm;
423 rc = obd_alloc_memmd(exp, &lsm);
428 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
430 GOTO(out, rc = -ENOMEM);
432 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
434 ptlrpc_request_free(req);
438 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
442 ptlrpc_request_set_replen(req);
444 if (oa->o_valid & OBD_MD_FLINLINE) {
445 LASSERT((oa->o_valid & OBD_MD_FLFLAGS) &&
446 oa->o_flags == OBD_FL_DELORPHAN);
448 "delorphan from OST integration");
449 /* Don't resend the delorphan req */
450 req->rq_no_resend = req->rq_no_delay = 1;
453 rc = ptlrpc_queue_wait(req);
457 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
459 GOTO(out_req, rc = -EPROTO);
463 /* This should really be sent by the OST */
464 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
465 oa->o_valid |= OBD_MD_FLBLKSZ;
467 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
468 * have valid lsm_oinfo data structs, so don't go touching that.
469 * This needs to be fixed in a big way.
471 lsm->lsm_object_id = oa->o_id;
472 lsm->lsm_object_gr = oa->o_gr;
476 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
478 if (oa->o_valid & OBD_MD_FLCOOKIE) {
479 if (!oti->oti_logcookies)
480 oti_alloc_cookies(oti, 1);
481 *oti->oti_logcookies = *obdo_logcookie(oa);
485 CDEBUG(D_HA, "transno: "LPD64"\n",
486 lustre_msg_get_transno(req->rq_repmsg));
488 ptlrpc_req_finished(req);
491 obd_free_memmd(exp, &lsm);
495 static int osc_punch_interpret(struct ptlrpc_request *req,
496 struct osc_async_args *aa, int rc)
498 struct ost_body *body;
504 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
506 GOTO(out, rc = -EPROTO);
508 *aa->aa_oi->oi_oa = body->oa;
510 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
514 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
515 struct obd_trans_info *oti,
516 struct ptlrpc_request_set *rqset)
518 struct ptlrpc_request *req;
519 struct osc_async_args *aa;
520 struct ost_body *body;
525 CDEBUG(D_INFO, "oa NULL\n");
529 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
533 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
534 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
536 ptlrpc_request_free(req);
539 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
540 osc_pack_req_body(req, oinfo);
542 /* overload the size and blocks fields in the oa with start/end */
543 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
545 body->oa.o_size = oinfo->oi_policy.l_extent.start;
546 body->oa.o_blocks = oinfo->oi_policy.l_extent.end;
547 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
548 ptlrpc_request_set_replen(req);
551 req->rq_interpret_reply = osc_punch_interpret;
552 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
553 aa = (struct osc_async_args *)&req->rq_async_args;
555 ptlrpc_set_add_req(rqset, req);
560 static int osc_sync(struct obd_export *exp, struct obdo *oa,
561 struct lov_stripe_md *md, obd_size start, obd_size end,
564 struct ptlrpc_request *req;
565 struct ost_body *body;
570 CDEBUG(D_INFO, "oa NULL\n");
574 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
578 osc_set_capa_size(req, &RMF_CAPA1, capa);
579 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
581 ptlrpc_request_free(req);
585 /* overload the size and blocks fields in the oa with start/end */
586 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
589 body->oa.o_size = start;
590 body->oa.o_blocks = end;
591 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
592 osc_pack_capa(req, body, capa);
594 ptlrpc_request_set_replen(req);
596 rc = ptlrpc_queue_wait(req);
600 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
602 GOTO(out, rc = -EPROTO);
608 ptlrpc_req_finished(req);
612 /* Find and cancel locally locks matched by @mode in the resource found by
613 * @objid. Found locks are added into @cancel list. Returns the amount of
614 * locks added to @cancels list. */
615 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
616 struct list_head *cancels, ldlm_mode_t mode,
619 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
620 struct ldlm_res_id res_id = { .name = { oa->o_id, 0, oa->o_gr, 0 } };
621 struct ldlm_resource *res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
628 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
629 lock_flags, 0, NULL);
630 ldlm_resource_putref(res);
634 static int osc_destroy_interpret(struct ptlrpc_request *req, void *data,
637 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
639 atomic_dec(&cli->cl_destroy_in_flight);
640 cfs_waitq_signal(&cli->cl_destroy_waitq);
644 static int osc_can_send_destroy(struct client_obd *cli)
646 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
647 cli->cl_max_rpcs_in_flight) {
648 /* The destroy request can be sent */
651 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
652 cli->cl_max_rpcs_in_flight) {
654 * The counter has been modified between the two atomic
657 cfs_waitq_signal(&cli->cl_destroy_waitq);
662 /* Destroy requests can be async always on the client, and we don't even really
663 * care about the return code since the client cannot do anything at all about
665 * When the MDS is unlinking a filename, it saves the file objects into a
666 * recovery llog, and these object records are cancelled when the OST reports
667 * they were destroyed and sync'd to disk (i.e. transaction committed).
668 * If the client dies, or the OST is down when the object should be destroyed,
669 * the records are not cancelled, and when the OST reconnects to the MDS next,
670 * it will retrieve the llog unlink logs and then sends the log cancellation
671 * cookies to the MDS after committing destroy transactions. */
672 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
673 struct lov_stripe_md *ea, struct obd_trans_info *oti,
674 struct obd_export *md_export)
676 struct client_obd *cli = &exp->exp_obd->u.cli;
677 struct ptlrpc_request *req;
678 struct ost_body *body;
679 CFS_LIST_HEAD(cancels);
684 CDEBUG(D_INFO, "oa NULL\n");
688 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
689 LDLM_FL_DISCARD_DATA);
691 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
693 ldlm_lock_list_put(&cancels, l_bl_ast, count);
697 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
700 ptlrpc_request_free(req);
704 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
705 req->rq_interpret_reply = osc_destroy_interpret;
707 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
708 memcpy(obdo_logcookie(oa), oti->oti_logcookies,
709 sizeof(*oti->oti_logcookies));
710 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
714 ptlrpc_request_set_replen(req);
716 if (!osc_can_send_destroy(cli)) {
717 struct l_wait_info lwi = { 0 };
720 * Wait until the number of on-going destroy RPCs drops
721 * under max_rpc_in_flight
723 l_wait_event_exclusive(cli->cl_destroy_waitq,
724 osc_can_send_destroy(cli), &lwi);
727 /* Do not wait for response */
728 ptlrpcd_add_req(req);
732 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
735 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
737 LASSERT(!(oa->o_valid & bits));
740 client_obd_list_lock(&cli->cl_loi_list_lock);
741 oa->o_dirty = cli->cl_dirty;
742 if (cli->cl_dirty > cli->cl_dirty_max) {
743 CERROR("dirty %lu > dirty_max %lu\n",
744 cli->cl_dirty, cli->cl_dirty_max);
746 } else if (atomic_read(&obd_dirty_pages) > obd_max_dirty_pages) {
747 CERROR("dirty %d > system dirty_max %d\n",
748 atomic_read(&obd_dirty_pages), obd_max_dirty_pages);
750 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
751 CERROR("dirty %lu - dirty_max %lu too big???\n",
752 cli->cl_dirty, cli->cl_dirty_max);
755 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
756 (cli->cl_max_rpcs_in_flight + 1);
757 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
759 oa->o_grant = cli->cl_avail_grant;
760 oa->o_dropped = cli->cl_lost_grant;
761 cli->cl_lost_grant = 0;
762 client_obd_list_unlock(&cli->cl_loi_list_lock);
763 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
764 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
767 /* caller must hold loi_list_lock */
768 static void osc_consume_write_grant(struct client_obd *cli,
769 struct brw_page *pga)
771 atomic_inc(&obd_dirty_pages);
772 cli->cl_dirty += CFS_PAGE_SIZE;
773 cli->cl_avail_grant -= CFS_PAGE_SIZE;
774 pga->flag |= OBD_BRW_FROM_GRANT;
775 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
776 CFS_PAGE_SIZE, pga, pga->pg);
777 LASSERT(cli->cl_avail_grant >= 0);
780 /* the companion to osc_consume_write_grant, called when a brw has completed.
781 * must be called with the loi lock held. */
782 static void osc_release_write_grant(struct client_obd *cli,
783 struct brw_page *pga, int sent)
785 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
788 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
793 pga->flag &= ~OBD_BRW_FROM_GRANT;
794 atomic_dec(&obd_dirty_pages);
795 cli->cl_dirty -= CFS_PAGE_SIZE;
797 cli->cl_lost_grant += CFS_PAGE_SIZE;
798 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
799 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
800 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
801 /* For short writes we shouldn't count parts of pages that
802 * span a whole block on the OST side, or our accounting goes
803 * wrong. Should match the code in filter_grant_check. */
804 int offset = pga->off & ~CFS_PAGE_MASK;
805 int count = pga->count + (offset & (blocksize - 1));
806 int end = (offset + pga->count) & (blocksize - 1);
808 count += blocksize - end;
810 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
811 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
812 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
813 cli->cl_avail_grant, cli->cl_dirty);
819 static unsigned long rpcs_in_flight(struct client_obd *cli)
821 return cli->cl_r_in_flight + cli->cl_w_in_flight;
824 /* caller must hold loi_list_lock */
825 void osc_wake_cache_waiters(struct client_obd *cli)
827 struct list_head *l, *tmp;
828 struct osc_cache_waiter *ocw;
831 list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
832 /* if we can't dirty more, we must wait until some is written */
833 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
834 (atomic_read(&obd_dirty_pages) + 1 > obd_max_dirty_pages)) {
835 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
836 "osc max %ld, sys max %d\n", cli->cl_dirty,
837 cli->cl_dirty_max, obd_max_dirty_pages);
841 /* if still dirty cache but no grant wait for pending RPCs that
842 * may yet return us some grant before doing sync writes */
843 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
844 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
845 cli->cl_w_in_flight);
849 ocw = list_entry(l, struct osc_cache_waiter, ocw_entry);
850 list_del_init(&ocw->ocw_entry);
851 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
852 /* no more RPCs in flight to return grant, do sync IO */
853 ocw->ocw_rc = -EDQUOT;
854 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
856 osc_consume_write_grant(cli,
857 &ocw->ocw_oap->oap_brw_page);
860 cfs_waitq_signal(&ocw->ocw_waitq);
866 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
868 client_obd_list_lock(&cli->cl_loi_list_lock);
869 cli->cl_avail_grant = ocd->ocd_grant;
870 client_obd_list_unlock(&cli->cl_loi_list_lock);
872 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld\n",
873 cli->cl_avail_grant, cli->cl_lost_grant);
874 LASSERT(cli->cl_avail_grant >= 0);
877 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
879 client_obd_list_lock(&cli->cl_loi_list_lock);
880 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
881 if (body->oa.o_valid & OBD_MD_FLGRANT)
882 cli->cl_avail_grant += body->oa.o_grant;
883 /* waiters are woken in brw_interpret_oap */
884 client_obd_list_unlock(&cli->cl_loi_list_lock);
887 /* We assume that the reason this OSC got a short read is because it read
888 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
889 * via the LOV, and it _knows_ it's reading inside the file, it's just that
890 * this stripe never got written at or beyond this stripe offset yet. */
891 static void handle_short_read(int nob_read, obd_count page_count,
892 struct brw_page **pga)
897 /* skip bytes read OK */
898 while (nob_read > 0) {
899 LASSERT (page_count > 0);
901 if (pga[i]->count > nob_read) {
902 /* EOF inside this page */
903 ptr = cfs_kmap(pga[i]->pg) +
904 (pga[i]->off & ~CFS_PAGE_MASK);
905 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
906 cfs_kunmap(pga[i]->pg);
912 nob_read -= pga[i]->count;
917 /* zero remaining pages */
918 while (page_count-- > 0) {
919 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
920 memset(ptr, 0, pga[i]->count);
921 cfs_kunmap(pga[i]->pg);
926 static int check_write_rcs(struct ptlrpc_request *req,
927 int requested_nob, int niocount,
928 obd_count page_count, struct brw_page **pga)
932 /* return error if any niobuf was in error */
933 remote_rcs = lustre_swab_repbuf(req, REQ_REC_OFF + 1,
934 sizeof(*remote_rcs) * niocount, NULL);
935 if (remote_rcs == NULL) {
936 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
939 if (lustre_msg_swabbed(req->rq_repmsg))
940 for (i = 0; i < niocount; i++)
941 __swab32s(&remote_rcs[i]);
943 for (i = 0; i < niocount; i++) {
944 if (remote_rcs[i] < 0)
945 return(remote_rcs[i]);
947 if (remote_rcs[i] != 0) {
948 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
949 i, remote_rcs[i], req);
954 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
955 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
956 requested_nob, req->rq_bulk->bd_nob_transferred);
963 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
965 if (p1->flag != p2->flag) {
966 unsigned mask = ~OBD_BRW_FROM_GRANT;
968 /* warn if we try to combine flags that we don't know to be
970 if ((p1->flag & mask) != (p2->flag & mask))
971 CERROR("is it ok to have flags 0x%x and 0x%x in the "
972 "same brw?\n", p1->flag, p2->flag);
976 return (p1->off + p1->count == p2->off);
979 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
980 struct brw_page **pga, int opc,
981 cksum_type_t cksum_type)
986 LASSERT (pg_count > 0);
987 cksum = init_checksum(cksum_type);
988 while (nob > 0 && pg_count > 0) {
989 unsigned char *ptr = cfs_kmap(pga[i]->pg);
990 int off = pga[i]->off & ~CFS_PAGE_MASK;
991 int count = pga[i]->count > nob ? nob : pga[i]->count;
993 /* corrupt the data before we compute the checksum, to
994 * simulate an OST->client data error */
995 if (i == 0 && opc == OST_READ &&
996 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
997 memcpy(ptr + off, "bad1", min(4, nob));
998 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
999 cfs_kunmap(pga[i]->pg);
1000 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
1003 nob -= pga[i]->count;
1007 /* For sending we only compute the wrong checksum instead
1008 * of corrupting the data so it is still correct on a redo */
1009 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1015 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1016 struct lov_stripe_md *lsm, obd_count page_count,
1017 struct brw_page **pga,
1018 struct ptlrpc_request **reqp,
1019 struct obd_capa *ocapa)
1021 struct ptlrpc_request *req;
1022 struct ptlrpc_bulk_desc *desc;
1023 struct ost_body *body;
1024 struct obd_ioobj *ioobj;
1025 struct niobuf_remote *niobuf;
1026 int niocount, i, requested_nob, opc, rc;
1027 struct osc_brw_async_args *aa;
1028 struct req_capsule *pill;
1031 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1032 RETURN(-ENOMEM); /* Recoverable */
1033 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1034 RETURN(-EINVAL); /* Fatal */
1036 if ((cmd & OBD_BRW_WRITE) != 0) {
1038 req = ptlrpc_request_alloc_pool(cli->cl_import,
1039 cli->cl_import->imp_rq_pool,
1043 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW);
1049 for (niocount = i = 1; i < page_count; i++) {
1050 if (!can_merge_pages(pga[i - 1], pga[i]))
1054 pill = &req->rq_pill;
1055 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1056 niocount * sizeof(*niobuf));
1057 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1059 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1061 ptlrpc_request_free(req);
1064 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1066 if (opc == OST_WRITE)
1067 desc = ptlrpc_prep_bulk_imp(req, page_count,
1068 BULK_GET_SOURCE, OST_BULK_PORTAL);
1070 desc = ptlrpc_prep_bulk_imp(req, page_count,
1071 BULK_PUT_SINK, OST_BULK_PORTAL);
1074 GOTO(out, rc = -ENOMEM);
1075 /* NB request now owns desc and will free it when it gets freed */
1077 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1078 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1079 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1080 LASSERT(body && ioobj && niobuf);
1084 obdo_to_ioobj(oa, ioobj);
1085 ioobj->ioo_bufcnt = niocount;
1086 osc_pack_capa(req, body, ocapa);
1087 LASSERT (page_count > 0);
1088 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1089 struct brw_page *pg = pga[i];
1090 struct brw_page *pg_prev = pga[i - 1];
1092 LASSERT(pg->count > 0);
1093 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1094 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1095 pg->off, pg->count);
1097 LASSERTF(i == 0 || pg->off > pg_prev->off,
1098 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1099 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1101 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1102 pg_prev->pg, page_private(pg_prev->pg),
1103 pg_prev->pg->index, pg_prev->off);
1105 LASSERTF(i == 0 || pg->off > pg_prev->off,
1106 "i %d p_c %u\n", i, page_count);
1108 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1109 (pg->flag & OBD_BRW_SRVLOCK));
1111 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1113 requested_nob += pg->count;
1115 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1117 niobuf->len += pg->count;
1119 niobuf->offset = pg->off;
1120 niobuf->len = pg->count;
1121 niobuf->flags = pg->flag;
1125 LASSERT((void *)(niobuf - niocount) ==
1126 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1127 niocount * sizeof(*niobuf)));
1128 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1130 /* size[REQ_REC_OFF] still sizeof (*body) */
1131 if (opc == OST_WRITE) {
1132 if (unlikely(cli->cl_checksum) &&
1133 req->rq_flvr.sf_bulk_hash == BULK_HASH_ALG_NULL) {
1134 /* store cl_cksum_type in a local variable since
1135 * it can be changed via lprocfs */
1136 cksum_type_t cksum_type = cli->cl_cksum_type;
1138 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1139 oa->o_flags = body->oa.o_flags = 0;
1140 body->oa.o_flags |= cksum_type_pack(cksum_type);
1141 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1142 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1146 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1148 /* save this in 'oa', too, for later checking */
1149 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1150 oa->o_flags |= cksum_type_pack(cksum_type);
1152 /* clear out the checksum flag, in case this is a
1153 * resend but cl_checksum is no longer set. b=11238 */
1154 oa->o_valid &= ~OBD_MD_FLCKSUM;
1156 oa->o_cksum = body->oa.o_cksum;
1157 /* 1 RC per niobuf */
1158 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER,
1159 sizeof(__u32) * niocount);
1161 if (unlikely(cli->cl_checksum) &&
1162 req->rq_flvr.sf_bulk_hash == BULK_HASH_ALG_NULL) {
1163 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1164 body->oa.o_flags = 0;
1165 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1166 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1168 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_SERVER, 0);
1169 /* 1 RC for the whole I/O */
1171 ptlrpc_request_set_replen(req);
1173 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1174 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1176 aa->aa_requested_nob = requested_nob;
1177 aa->aa_nio_count = niocount;
1178 aa->aa_page_count = page_count;
1182 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1188 ptlrpc_req_finished(req);
1192 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1193 __u32 client_cksum, __u32 server_cksum, int nob,
1194 obd_count page_count, struct brw_page **pga,
1195 cksum_type_t client_cksum_type)
1199 cksum_type_t cksum_type;
1201 if (server_cksum == client_cksum) {
1202 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1206 if (oa->o_valid & OBD_MD_FLFLAGS)
1207 cksum_type = cksum_type_unpack(oa->o_flags);
1209 cksum_type = OBD_CKSUM_CRC32;
1211 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1214 if (cksum_type != client_cksum_type)
1215 msg = "the server did not use the checksum type specified in "
1216 "the original request - likely a protocol problem";
1217 else if (new_cksum == server_cksum)
1218 msg = "changed on the client after we checksummed it - "
1219 "likely false positive due to mmap IO (bug 11742)";
1220 else if (new_cksum == client_cksum)
1221 msg = "changed in transit before arrival at OST";
1223 msg = "changed in transit AND doesn't match the original - "
1224 "likely false positive due to mmap IO (bug 11742)";
1226 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1227 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1228 "["LPU64"-"LPU64"]\n",
1229 msg, libcfs_nid2str(peer->nid),
1230 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1231 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1234 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1236 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1237 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1238 "client csum now %x\n", client_cksum, client_cksum_type,
1239 server_cksum, cksum_type, new_cksum);
1243 /* Note rc enters this function as number of bytes transferred */
1244 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1246 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1247 const lnet_process_id_t *peer =
1248 &req->rq_import->imp_connection->c_peer;
1249 struct client_obd *cli = aa->aa_cli;
1250 struct ost_body *body;
1251 __u32 client_cksum = 0;
1254 if (rc < 0 && rc != -EDQUOT)
1257 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1258 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1259 lustre_swab_ost_body);
1261 CDEBUG(D_INFO, "Can't unpack body\n");
1265 /* set/clear over quota flag for a uid/gid */
1266 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1267 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA))
1268 lquota_setdq(quota_interface, cli, body->oa.o_uid,
1269 body->oa.o_gid, body->oa.o_valid,
1275 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1276 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1278 osc_update_grant(cli, body);
1280 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1282 CERROR("Unexpected +ve rc %d\n", rc);
1285 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1287 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1288 check_write_checksum(&body->oa, peer, client_cksum,
1289 body->oa.o_cksum, aa->aa_requested_nob,
1290 aa->aa_page_count, aa->aa_ppga,
1291 cksum_type_unpack(aa->aa_oa->o_flags)))
1294 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1297 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1298 aa->aa_page_count, aa->aa_ppga);
1302 /* The rest of this function executes only for OST_READs */
1303 if (rc > aa->aa_requested_nob) {
1304 CERROR("Unexpected rc %d (%d requested)\n", rc,
1305 aa->aa_requested_nob);
1309 if (rc != req->rq_bulk->bd_nob_transferred) {
1310 CERROR ("Unexpected rc %d (%d transferred)\n",
1311 rc, req->rq_bulk->bd_nob_transferred);
1315 if (rc < aa->aa_requested_nob)
1316 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1318 if (sptlrpc_cli_unwrap_bulk_read(req, rc, aa->aa_page_count,
1320 GOTO(out, rc = -EAGAIN);
1322 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1323 static int cksum_counter;
1324 __u32 server_cksum = body->oa.o_cksum;
1327 cksum_type_t cksum_type;
1329 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1330 cksum_type = cksum_type_unpack(body->oa.o_flags);
1332 cksum_type = OBD_CKSUM_CRC32;
1333 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1334 aa->aa_ppga, OST_READ,
1337 if (peer->nid == req->rq_bulk->bd_sender) {
1341 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1344 if (server_cksum == ~0 && rc > 0) {
1345 CERROR("Protocol error: server %s set the 'checksum' "
1346 "bit, but didn't send a checksum. Not fatal, "
1347 "but please tell CFS.\n",
1348 libcfs_nid2str(peer->nid));
1349 } else if (server_cksum != client_cksum) {
1350 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1351 "%s%s%s inum "LPU64"/"LPU64" object "
1352 LPU64"/"LPU64" extent "
1353 "["LPU64"-"LPU64"]\n",
1354 req->rq_import->imp_obd->obd_name,
1355 libcfs_nid2str(peer->nid),
1357 body->oa.o_valid & OBD_MD_FLFID ?
1358 body->oa.o_fid : (__u64)0,
1359 body->oa.o_valid & OBD_MD_FLFID ?
1360 body->oa.o_generation :(__u64)0,
1362 body->oa.o_valid & OBD_MD_FLGROUP ?
1363 body->oa.o_gr : (__u64)0,
1364 aa->aa_ppga[0]->off,
1365 aa->aa_ppga[aa->aa_page_count-1]->off +
1366 aa->aa_ppga[aa->aa_page_count-1]->count -
1368 CERROR("client %x, server %x, cksum_type %x\n",
1369 client_cksum, server_cksum, cksum_type);
1371 aa->aa_oa->o_cksum = client_cksum;
1375 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1378 } else if (unlikely(client_cksum)) {
1379 static int cksum_missed;
1382 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1383 CERROR("Checksum %u requested from %s but not sent\n",
1384 cksum_missed, libcfs_nid2str(peer->nid));
1390 *aa->aa_oa = body->oa;
1395 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1396 struct lov_stripe_md *lsm,
1397 obd_count page_count, struct brw_page **pga,
1398 struct obd_capa *ocapa)
1400 struct ptlrpc_request *req;
1404 struct l_wait_info lwi;
1408 cfs_waitq_init(&waitq);
1411 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1412 page_count, pga, &req, ocapa);
1416 rc = ptlrpc_queue_wait(req);
1418 if (rc == -ETIMEDOUT && req->rq_resend) {
1419 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1420 ptlrpc_req_finished(req);
1424 rc = osc_brw_fini_request(req, rc);
1426 ptlrpc_req_finished(req);
1427 if (osc_recoverable_error(rc)) {
1429 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1430 CERROR("too many resend retries, returning error\n");
1434 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1435 l_wait_event(waitq, 0, &lwi);
1443 int osc_brw_redo_request(struct ptlrpc_request *request,
1444 struct osc_brw_async_args *aa)
1446 struct ptlrpc_request *new_req;
1447 struct ptlrpc_request_set *set = request->rq_set;
1448 struct osc_brw_async_args *new_aa;
1449 struct osc_async_page *oap;
1453 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1454 CERROR("too many resend retries, returning error\n");
1458 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1460 body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1461 if (body->oa.o_valid & OBD_MD_FLOSSCAPA)
1462 ocapa = lustre_unpack_capa(request->rq_reqmsg,
1465 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1466 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1467 aa->aa_cli, aa->aa_oa,
1468 NULL /* lsm unused by osc currently */,
1469 aa->aa_page_count, aa->aa_ppga,
1470 &new_req, NULL /* ocapa */);
1474 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1476 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1477 if (oap->oap_request != NULL) {
1478 LASSERTF(request == oap->oap_request,
1479 "request %p != oap_request %p\n",
1480 request, oap->oap_request);
1481 if (oap->oap_interrupted) {
1482 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1483 ptlrpc_req_finished(new_req);
1488 /* New request takes over pga and oaps from old request.
1489 * Note that copying a list_head doesn't work, need to move it... */
1491 new_req->rq_interpret_reply = request->rq_interpret_reply;
1492 new_req->rq_async_args = request->rq_async_args;
1493 new_req->rq_sent = cfs_time_current_sec() + aa->aa_resends;
1495 new_aa = (struct osc_brw_async_args *)&new_req->rq_async_args;
1497 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1498 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1499 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1501 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1502 if (oap->oap_request) {
1503 ptlrpc_req_finished(oap->oap_request);
1504 oap->oap_request = ptlrpc_request_addref(new_req);
1508 /* use ptlrpc_set_add_req is safe because interpret functions work
1509 * in check_set context. only one way exist with access to request
1510 * from different thread got -EINTR - this way protected with
1511 * cl_loi_list_lock */
1512 ptlrpc_set_add_req(set, new_req);
1514 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1516 DEBUG_REQ(D_INFO, new_req, "new request");
1520 static int brw_interpret(struct ptlrpc_request *req, void *data, int rc)
1522 struct osc_brw_async_args *aa = data;
1526 rc = osc_brw_fini_request(req, rc);
1527 if (osc_recoverable_error(rc)) {
1528 rc = osc_brw_redo_request(req, aa);
1533 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1534 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1535 aa->aa_cli->cl_w_in_flight--;
1537 aa->aa_cli->cl_r_in_flight--;
1538 for (i = 0; i < aa->aa_page_count; i++)
1539 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
1540 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1542 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1547 static int async_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1548 struct lov_stripe_md *lsm, obd_count page_count,
1549 struct brw_page **pga, struct ptlrpc_request_set *set,
1550 struct obd_capa *ocapa)
1552 struct ptlrpc_request *req;
1553 struct client_obd *cli = &exp->exp_obd->u.cli;
1555 struct osc_brw_async_args *aa;
1558 /* Consume write credits even if doing a sync write -
1559 * otherwise we may run out of space on OST due to grant. */
1560 if (cmd == OBD_BRW_WRITE) {
1561 spin_lock(&cli->cl_loi_list_lock);
1562 for (i = 0; i < page_count; i++) {
1563 if (cli->cl_avail_grant >= CFS_PAGE_SIZE)
1564 osc_consume_write_grant(cli, pga[i]);
1566 spin_unlock(&cli->cl_loi_list_lock);
1569 rc = osc_brw_prep_request(cmd, cli, oa, lsm, page_count, pga,
1572 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1573 if (cmd == OBD_BRW_READ) {
1574 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
1575 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
1576 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
1578 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
1579 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
1580 cli->cl_w_in_flight);
1581 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
1585 req->rq_interpret_reply = brw_interpret;
1586 ptlrpc_set_add_req(set, req);
1587 client_obd_list_lock(&cli->cl_loi_list_lock);
1588 if (cmd == OBD_BRW_READ)
1589 cli->cl_r_in_flight++;
1591 cli->cl_w_in_flight++;
1592 client_obd_list_unlock(&cli->cl_loi_list_lock);
1593 } else if (cmd == OBD_BRW_WRITE) {
1594 client_obd_list_lock(&cli->cl_loi_list_lock);
1595 for (i = 0; i < page_count; i++)
1596 osc_release_write_grant(cli, pga[i], 0);
1597 client_obd_list_unlock(&cli->cl_loi_list_lock);
1603 * ugh, we want disk allocation on the target to happen in offset order. we'll
1604 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1605 * fine for our small page arrays and doesn't require allocation. its an
1606 * insertion sort that swaps elements that are strides apart, shrinking the
1607 * stride down until its '1' and the array is sorted.
1609 static void sort_brw_pages(struct brw_page **array, int num)
1612 struct brw_page *tmp;
1616 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1621 for (i = stride ; i < num ; i++) {
1624 while (j >= stride && array[j - stride]->off > tmp->off) {
1625 array[j] = array[j - stride];
1630 } while (stride > 1);
1633 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1639 LASSERT (pages > 0);
1640 offset = pg[i]->off & ~CFS_PAGE_MASK;
1644 if (pages == 0) /* that's all */
1647 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1648 return count; /* doesn't end on page boundary */
1651 offset = pg[i]->off & ~CFS_PAGE_MASK;
1652 if (offset != 0) /* doesn't start on page boundary */
1659 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1661 struct brw_page **ppga;
1664 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1668 for (i = 0; i < count; i++)
1673 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1675 LASSERT(ppga != NULL);
1676 OBD_FREE(ppga, sizeof(*ppga) * count);
1679 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1680 obd_count page_count, struct brw_page *pga,
1681 struct obd_trans_info *oti)
1683 struct obdo *saved_oa = NULL;
1684 struct brw_page **ppga, **orig;
1685 struct obd_import *imp = class_exp2cliimp(exp);
1686 struct client_obd *cli = &imp->imp_obd->u.cli;
1687 int rc, page_count_orig;
1690 if (cmd & OBD_BRW_CHECK) {
1691 /* The caller just wants to know if there's a chance that this
1692 * I/O can succeed */
1694 if (imp == NULL || imp->imp_invalid)
1699 /* test_brw with a failed create can trip this, maybe others. */
1700 LASSERT(cli->cl_max_pages_per_rpc);
1704 orig = ppga = osc_build_ppga(pga, page_count);
1707 page_count_orig = page_count;
1709 sort_brw_pages(ppga, page_count);
1710 while (page_count) {
1711 obd_count pages_per_brw;
1713 if (page_count > cli->cl_max_pages_per_rpc)
1714 pages_per_brw = cli->cl_max_pages_per_rpc;
1716 pages_per_brw = page_count;
1718 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1720 if (saved_oa != NULL) {
1721 /* restore previously saved oa */
1722 *oinfo->oi_oa = *saved_oa;
1723 } else if (page_count > pages_per_brw) {
1724 /* save a copy of oa (brw will clobber it) */
1725 OBDO_ALLOC(saved_oa);
1726 if (saved_oa == NULL)
1727 GOTO(out, rc = -ENOMEM);
1728 *saved_oa = *oinfo->oi_oa;
1731 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1732 pages_per_brw, ppga, oinfo->oi_capa);
1737 page_count -= pages_per_brw;
1738 ppga += pages_per_brw;
1742 osc_release_ppga(orig, page_count_orig);
1744 if (saved_oa != NULL)
1745 OBDO_FREE(saved_oa);
1750 static int osc_brw_async(int cmd, struct obd_export *exp,
1751 struct obd_info *oinfo, obd_count page_count,
1752 struct brw_page *pga, struct obd_trans_info *oti,
1753 struct ptlrpc_request_set *set)
1755 struct brw_page **ppga, **orig;
1756 struct client_obd *cli = &exp->exp_obd->u.cli;
1757 int page_count_orig;
1761 if (cmd & OBD_BRW_CHECK) {
1762 struct obd_import *imp = class_exp2cliimp(exp);
1763 /* The caller just wants to know if there's a chance that this
1764 * I/O can succeed */
1766 if (imp == NULL || imp->imp_invalid)
1771 orig = ppga = osc_build_ppga(pga, page_count);
1774 page_count_orig = page_count;
1776 sort_brw_pages(ppga, page_count);
1777 while (page_count) {
1778 struct brw_page **copy;
1779 obd_count pages_per_brw;
1781 pages_per_brw = min_t(obd_count, page_count,
1782 cli->cl_max_pages_per_rpc);
1784 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1786 /* use ppga only if single RPC is going to fly */
1787 if (pages_per_brw != page_count_orig || ppga != orig) {
1788 OBD_ALLOC(copy, sizeof(*copy) * pages_per_brw);
1790 GOTO(out, rc = -ENOMEM);
1791 memcpy(copy, ppga, sizeof(*copy) * pages_per_brw);
1795 rc = async_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1796 pages_per_brw, copy, set, oinfo->oi_capa);
1800 OBD_FREE(copy, sizeof(*copy) * pages_per_brw);
1804 /* we passed it to async_internal() which is
1805 * now responsible for releasing memory */
1809 page_count -= pages_per_brw;
1810 ppga += pages_per_brw;
1814 osc_release_ppga(orig, page_count_orig);
1818 static void osc_check_rpcs(struct client_obd *cli);
1820 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1821 * the dirty accounting. Writeback completes or truncate happens before
1822 * writing starts. Must be called with the loi lock held. */
1823 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1826 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1830 /* This maintains the lists of pending pages to read/write for a given object
1831 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1832 * to quickly find objects that are ready to send an RPC. */
1833 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1839 if (lop->lop_num_pending == 0)
1842 /* if we have an invalid import we want to drain the queued pages
1843 * by forcing them through rpcs that immediately fail and complete
1844 * the pages. recovery relies on this to empty the queued pages
1845 * before canceling the locks and evicting down the llite pages */
1846 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1849 /* stream rpcs in queue order as long as as there is an urgent page
1850 * queued. this is our cheap solution for good batching in the case
1851 * where writepage marks some random page in the middle of the file
1852 * as urgent because of, say, memory pressure */
1853 if (!list_empty(&lop->lop_urgent)) {
1854 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1857 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1858 optimal = cli->cl_max_pages_per_rpc;
1859 if (cmd & OBD_BRW_WRITE) {
1860 /* trigger a write rpc stream as long as there are dirtiers
1861 * waiting for space. as they're waiting, they're not going to
1862 * create more pages to coallesce with what's waiting.. */
1863 if (!list_empty(&cli->cl_cache_waiters)) {
1864 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1867 /* +16 to avoid triggering rpcs that would want to include pages
1868 * that are being queued but which can't be made ready until
1869 * the queuer finishes with the page. this is a wart for
1870 * llite::commit_write() */
1873 if (lop->lop_num_pending >= optimal)
1879 static void on_list(struct list_head *item, struct list_head *list,
1882 if (list_empty(item) && should_be_on)
1883 list_add_tail(item, list);
1884 else if (!list_empty(item) && !should_be_on)
1885 list_del_init(item);
1888 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1889 * can find pages to build into rpcs quickly */
1890 static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1892 on_list(&loi->loi_cli_item, &cli->cl_loi_ready_list,
1893 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE) ||
1894 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1896 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1897 loi->loi_write_lop.lop_num_pending);
1899 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1900 loi->loi_read_lop.lop_num_pending);
1903 static void lop_update_pending(struct client_obd *cli,
1904 struct loi_oap_pages *lop, int cmd, int delta)
1906 lop->lop_num_pending += delta;
1907 if (cmd & OBD_BRW_WRITE)
1908 cli->cl_pending_w_pages += delta;
1910 cli->cl_pending_r_pages += delta;
1913 /* this is called when a sync waiter receives an interruption. Its job is to
1914 * get the caller woken as soon as possible. If its page hasn't been put in an
1915 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
1916 * desiring interruption which will forcefully complete the rpc once the rpc
1918 static void osc_occ_interrupted(struct oig_callback_context *occ)
1920 struct osc_async_page *oap;
1921 struct loi_oap_pages *lop;
1922 struct lov_oinfo *loi;
1925 /* XXX member_of() */
1926 oap = list_entry(occ, struct osc_async_page, oap_occ);
1928 client_obd_list_lock(&oap->oap_cli->cl_loi_list_lock);
1930 oap->oap_interrupted = 1;
1932 /* ok, it's been put in an rpc. only one oap gets a request reference */
1933 if (oap->oap_request != NULL) {
1934 ptlrpc_mark_interrupted(oap->oap_request);
1935 ptlrpcd_wake(oap->oap_request);
1939 /* we don't get interruption callbacks until osc_trigger_group_io()
1940 * has been called and put the sync oaps in the pending/urgent lists.*/
1941 if (!list_empty(&oap->oap_pending_item)) {
1942 list_del_init(&oap->oap_pending_item);
1943 list_del_init(&oap->oap_urgent_item);
1946 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
1947 &loi->loi_write_lop : &loi->loi_read_lop;
1948 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
1949 loi_list_maint(oap->oap_cli, oap->oap_loi);
1951 oig_complete_one(oap->oap_oig, &oap->oap_occ, -EINTR);
1952 oap->oap_oig = NULL;
1956 client_obd_list_unlock(&oap->oap_cli->cl_loi_list_lock);
1959 /* this is trying to propogate async writeback errors back up to the
1960 * application. As an async write fails we record the error code for later if
1961 * the app does an fsync. As long as errors persist we force future rpcs to be
1962 * sync so that the app can get a sync error and break the cycle of queueing
1963 * pages for which writeback will fail. */
1964 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
1971 ar->ar_force_sync = 1;
1972 ar->ar_min_xid = ptlrpc_sample_next_xid();
1977 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
1978 ar->ar_force_sync = 0;
1981 static void osc_oap_to_pending(struct osc_async_page *oap)
1983 struct loi_oap_pages *lop;
1985 if (oap->oap_cmd & OBD_BRW_WRITE)
1986 lop = &oap->oap_loi->loi_write_lop;
1988 lop = &oap->oap_loi->loi_read_lop;
1990 if (oap->oap_async_flags & ASYNC_URGENT)
1991 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
1992 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
1993 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
1996 /* this must be called holding the loi list lock to give coverage to exit_cache,
1997 * async_flag maintenance, and oap_request */
1998 static void osc_ap_completion(struct client_obd *cli, struct obdo *oa,
1999 struct osc_async_page *oap, int sent, int rc)
2004 if (oap->oap_request != NULL) {
2005 xid = ptlrpc_req_xid(oap->oap_request);
2006 ptlrpc_req_finished(oap->oap_request);
2007 oap->oap_request = NULL;
2010 oap->oap_async_flags = 0;
2011 oap->oap_interrupted = 0;
2013 if (oap->oap_cmd & OBD_BRW_WRITE) {
2014 osc_process_ar(&cli->cl_ar, xid, rc);
2015 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
2018 if (rc == 0 && oa != NULL) {
2019 if (oa->o_valid & OBD_MD_FLBLOCKS)
2020 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
2021 if (oa->o_valid & OBD_MD_FLMTIME)
2022 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
2023 if (oa->o_valid & OBD_MD_FLATIME)
2024 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
2025 if (oa->o_valid & OBD_MD_FLCTIME)
2026 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
2030 osc_exit_cache(cli, oap, sent);
2031 oig_complete_one(oap->oap_oig, &oap->oap_occ, rc);
2032 oap->oap_oig = NULL;
2037 rc = oap->oap_caller_ops->ap_completion(oap->oap_caller_data,
2038 oap->oap_cmd, oa, rc);
2040 /* ll_ap_completion (from llite) drops PG_locked. so, a new
2041 * I/O on the page could start, but OSC calls it under lock
2042 * and thus we can add oap back to pending safely */
2044 /* upper layer wants to leave the page on pending queue */
2045 osc_oap_to_pending(oap);
2047 osc_exit_cache(cli, oap, sent);
2051 static int brw_interpret_oap(struct ptlrpc_request *req, void *data, int rc)
2053 struct osc_async_page *oap, *tmp;
2054 struct osc_brw_async_args *aa = data;
2055 struct client_obd *cli;
2058 rc = osc_brw_fini_request(req, rc);
2059 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
2060 if (osc_recoverable_error(rc)) {
2061 rc = osc_brw_redo_request(req, aa);
2068 client_obd_list_lock(&cli->cl_loi_list_lock);
2070 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2071 * is called so we know whether to go to sync BRWs or wait for more
2072 * RPCs to complete */
2073 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2074 cli->cl_w_in_flight--;
2076 cli->cl_r_in_flight--;
2078 /* the caller may re-use the oap after the completion call so
2079 * we need to clean it up a little */
2080 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
2081 list_del_init(&oap->oap_rpc_item);
2082 osc_ap_completion(cli, aa->aa_oa, oap, 1, rc);
2085 osc_wake_cache_waiters(cli);
2086 osc_check_rpcs(cli);
2088 client_obd_list_unlock(&cli->cl_loi_list_lock);
2090 OBDO_FREE(aa->aa_oa);
2092 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2096 static struct ptlrpc_request *osc_build_req(struct client_obd *cli,
2097 struct list_head *rpc_list,
2098 int page_count, int cmd)
2100 struct ptlrpc_request *req;
2101 struct brw_page **pga = NULL;
2102 struct osc_brw_async_args *aa;
2103 struct obdo *oa = NULL;
2104 struct obd_async_page_ops *ops = NULL;
2105 void *caller_data = NULL;
2106 struct obd_capa *ocapa;
2107 struct osc_async_page *oap;
2111 LASSERT(!list_empty(rpc_list));
2113 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2115 RETURN(ERR_PTR(-ENOMEM));
2119 GOTO(out, req = ERR_PTR(-ENOMEM));
2122 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2124 ops = oap->oap_caller_ops;
2125 caller_data = oap->oap_caller_data;
2127 pga[i] = &oap->oap_brw_page;
2128 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2129 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2130 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2134 /* always get the data for the obdo for the rpc */
2135 LASSERT(ops != NULL);
2136 ops->ap_fill_obdo(caller_data, cmd, oa);
2137 ocapa = ops->ap_lookup_capa(caller_data, cmd);
2139 sort_brw_pages(pga, page_count);
2140 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2144 CERROR("prep_req failed: %d\n", rc);
2145 GOTO(out, req = ERR_PTR(rc));
2148 /* Need to update the timestamps after the request is built in case
2149 * we race with setattr (locally or in queue at OST). If OST gets
2150 * later setattr before earlier BRW (as determined by the request xid),
2151 * the OST will not use BRW timestamps. Sadly, there is no obvious
2152 * way to do this in a single call. bug 10150 */
2153 ops->ap_update_obdo(caller_data, cmd, oa,
2154 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME);
2156 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2157 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2158 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2159 list_splice(rpc_list, &aa->aa_oaps);
2160 CFS_INIT_LIST_HEAD(rpc_list);
2167 OBD_FREE(pga, sizeof(*pga) * page_count);
2172 /* the loi lock is held across this function but it's allowed to release
2173 * and reacquire it during its work */
2174 static int osc_send_oap_rpc(struct client_obd *cli, struct lov_oinfo *loi,
2175 int cmd, struct loi_oap_pages *lop)
2177 struct ptlrpc_request *req;
2178 obd_count page_count = 0;
2179 struct osc_async_page *oap = NULL, *tmp;
2180 struct osc_brw_async_args *aa;
2181 struct obd_async_page_ops *ops;
2182 CFS_LIST_HEAD(rpc_list);
2183 unsigned int ending_offset;
2184 unsigned starting_offset = 0;
2188 /* first we find the pages we're allowed to work with */
2189 list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2191 ops = oap->oap_caller_ops;
2193 LASSERT(oap->oap_magic == OAP_MAGIC);
2195 if (page_count != 0 &&
2196 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2197 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2198 " oap %p, page %p, srvlock %u\n",
2199 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2202 /* in llite being 'ready' equates to the page being locked
2203 * until completion unlocks it. commit_write submits a page
2204 * as not ready because its unlock will happen unconditionally
2205 * as the call returns. if we race with commit_write giving
2206 * us that page we dont' want to create a hole in the page
2207 * stream, so we stop and leave the rpc to be fired by
2208 * another dirtier or kupdated interval (the not ready page
2209 * will still be on the dirty list). we could call in
2210 * at the end of ll_file_write to process the queue again. */
2211 if (!(oap->oap_async_flags & ASYNC_READY)) {
2212 int rc = ops->ap_make_ready(oap->oap_caller_data, cmd);
2214 CDEBUG(D_INODE, "oap %p page %p returned %d "
2215 "instead of ready\n", oap,
2219 /* llite is telling us that the page is still
2220 * in commit_write and that we should try
2221 * and put it in an rpc again later. we
2222 * break out of the loop so we don't create
2223 * a hole in the sequence of pages in the rpc
2228 /* the io isn't needed.. tell the checks
2229 * below to complete the rpc with EINTR */
2230 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2231 oap->oap_count = -EINTR;
2234 oap->oap_async_flags |= ASYNC_READY;
2237 LASSERTF(0, "oap %p page %p returned %d "
2238 "from make_ready\n", oap,
2246 * Page submitted for IO has to be locked. Either by
2247 * ->ap_make_ready() or by higher layers.
2249 * XXX nikita: this assertion should be adjusted when lustre
2250 * starts using PG_writeback for pages being written out.
2252 #if defined(__KERNEL__) && defined(__linux__)
2253 LASSERT(PageLocked(oap->oap_page));
2255 /* If there is a gap at the start of this page, it can't merge
2256 * with any previous page, so we'll hand the network a
2257 * "fragmented" page array that it can't transfer in 1 RDMA */
2258 if (page_count != 0 && oap->oap_page_off != 0)
2261 /* take the page out of our book-keeping */
2262 list_del_init(&oap->oap_pending_item);
2263 lop_update_pending(cli, lop, cmd, -1);
2264 list_del_init(&oap->oap_urgent_item);
2266 if (page_count == 0)
2267 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2268 (PTLRPC_MAX_BRW_SIZE - 1);
2270 /* ask the caller for the size of the io as the rpc leaves. */
2271 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE))
2273 ops->ap_refresh_count(oap->oap_caller_data,cmd);
2274 if (oap->oap_count <= 0) {
2275 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2277 osc_ap_completion(cli, NULL, oap, 0, oap->oap_count);
2281 /* now put the page back in our accounting */
2282 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2283 if (page_count == 0)
2284 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2285 if (++page_count >= cli->cl_max_pages_per_rpc)
2288 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2289 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2290 * have the same alignment as the initial writes that allocated
2291 * extents on the server. */
2292 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2293 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2294 if (ending_offset == 0)
2297 /* If there is a gap at the end of this page, it can't merge
2298 * with any subsequent pages, so we'll hand the network a
2299 * "fragmented" page array that it can't transfer in 1 RDMA */
2300 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2304 osc_wake_cache_waiters(cli);
2306 if (page_count == 0)
2309 loi_list_maint(cli, loi);
2311 client_obd_list_unlock(&cli->cl_loi_list_lock);
2313 req = osc_build_req(cli, &rpc_list, page_count, cmd);
2315 /* this should happen rarely and is pretty bad, it makes the
2316 * pending list not follow the dirty order */
2317 client_obd_list_lock(&cli->cl_loi_list_lock);
2318 list_for_each_entry_safe(oap, tmp, &rpc_list, oap_rpc_item) {
2319 list_del_init(&oap->oap_rpc_item);
2321 /* queued sync pages can be torn down while the pages
2322 * were between the pending list and the rpc */
2323 if (oap->oap_interrupted) {
2324 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2325 osc_ap_completion(cli, NULL, oap, 0,
2329 osc_ap_completion(cli, NULL, oap, 0, PTR_ERR(req));
2331 loi_list_maint(cli, loi);
2332 RETURN(PTR_ERR(req));
2335 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2337 if (cmd == OBD_BRW_READ) {
2338 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2339 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2340 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2341 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2342 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
2344 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2345 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2346 cli->cl_w_in_flight);
2347 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2348 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2349 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
2352 client_obd_list_lock(&cli->cl_loi_list_lock);
2354 if (cmd == OBD_BRW_READ)
2355 cli->cl_r_in_flight++;
2357 cli->cl_w_in_flight++;
2359 /* queued sync pages can be torn down while the pages
2360 * were between the pending list and the rpc */
2362 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2363 /* only one oap gets a request reference */
2366 if (oap->oap_interrupted && !req->rq_intr) {
2367 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2369 ptlrpc_mark_interrupted(req);
2373 tmp->oap_request = ptlrpc_request_addref(req);
2375 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2376 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2378 req->rq_interpret_reply = brw_interpret_oap;
2379 ptlrpcd_add_req(req);
2383 #define LOI_DEBUG(LOI, STR, args...) \
2384 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2385 !list_empty(&(LOI)->loi_cli_item), \
2386 (LOI)->loi_write_lop.lop_num_pending, \
2387 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2388 (LOI)->loi_read_lop.lop_num_pending, \
2389 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2392 /* This is called by osc_check_rpcs() to find which objects have pages that
2393 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2394 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2397 /* first return all objects which we already know to have
2398 * pages ready to be stuffed into rpcs */
2399 if (!list_empty(&cli->cl_loi_ready_list))
2400 RETURN(list_entry(cli->cl_loi_ready_list.next,
2401 struct lov_oinfo, loi_cli_item));
2403 /* then if we have cache waiters, return all objects with queued
2404 * writes. This is especially important when many small files
2405 * have filled up the cache and not been fired into rpcs because
2406 * they don't pass the nr_pending/object threshhold */
2407 if (!list_empty(&cli->cl_cache_waiters) &&
2408 !list_empty(&cli->cl_loi_write_list))
2409 RETURN(list_entry(cli->cl_loi_write_list.next,
2410 struct lov_oinfo, loi_write_item));
2412 /* then return all queued objects when we have an invalid import
2413 * so that they get flushed */
2414 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2415 if (!list_empty(&cli->cl_loi_write_list))
2416 RETURN(list_entry(cli->cl_loi_write_list.next,
2417 struct lov_oinfo, loi_write_item));
2418 if (!list_empty(&cli->cl_loi_read_list))
2419 RETURN(list_entry(cli->cl_loi_read_list.next,
2420 struct lov_oinfo, loi_read_item));
2425 /* called with the loi list lock held */
2426 static void osc_check_rpcs(struct client_obd *cli)
2428 struct lov_oinfo *loi;
2429 int rc = 0, race_counter = 0;
2432 while ((loi = osc_next_loi(cli)) != NULL) {
2433 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2435 if (rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight)
2438 /* attempt some read/write balancing by alternating between
2439 * reads and writes in an object. The makes_rpc checks here
2440 * would be redundant if we were getting read/write work items
2441 * instead of objects. we don't want send_oap_rpc to drain a
2442 * partial read pending queue when we're given this object to
2443 * do io on writes while there are cache waiters */
2444 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2445 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_WRITE,
2446 &loi->loi_write_lop);
2454 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2455 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_READ,
2456 &loi->loi_read_lop);
2465 /* attempt some inter-object balancing by issueing rpcs
2466 * for each object in turn */
2467 if (!list_empty(&loi->loi_cli_item))
2468 list_del_init(&loi->loi_cli_item);
2469 if (!list_empty(&loi->loi_write_item))
2470 list_del_init(&loi->loi_write_item);
2471 if (!list_empty(&loi->loi_read_item))
2472 list_del_init(&loi->loi_read_item);
2474 loi_list_maint(cli, loi);
2476 /* send_oap_rpc fails with 0 when make_ready tells it to
2477 * back off. llite's make_ready does this when it tries
2478 * to lock a page queued for write that is already locked.
2479 * we want to try sending rpcs from many objects, but we
2480 * don't want to spin failing with 0. */
2481 if (race_counter == 10)
2487 /* we're trying to queue a page in the osc so we're subject to the
2488 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2489 * If the osc's queued pages are already at that limit, then we want to sleep
2490 * until there is space in the osc's queue for us. We also may be waiting for
2491 * write credits from the OST if there are RPCs in flight that may return some
2492 * before we fall back to sync writes.
2494 * We need this know our allocation was granted in the presence of signals */
2495 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2499 client_obd_list_lock(&cli->cl_loi_list_lock);
2500 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2501 client_obd_list_unlock(&cli->cl_loi_list_lock);
2505 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2506 * grant or cache space. */
2507 static int osc_enter_cache(struct client_obd *cli, struct lov_oinfo *loi,
2508 struct osc_async_page *oap)
2510 struct osc_cache_waiter ocw;
2511 struct l_wait_info lwi = { 0 };
2515 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2516 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2517 cli->cl_dirty_max, obd_max_dirty_pages,
2518 cli->cl_lost_grant, cli->cl_avail_grant);
2520 /* force the caller to try sync io. this can jump the list
2521 * of queued writes and create a discontiguous rpc stream */
2522 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2523 loi->loi_ar.ar_force_sync)
2526 /* Hopefully normal case - cache space and write credits available */
2527 if ((cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max) &&
2528 (atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages) &&
2529 (cli->cl_avail_grant >= CFS_PAGE_SIZE)) {
2530 /* account for ourselves */
2531 osc_consume_write_grant(cli, &oap->oap_brw_page);
2535 /* Make sure that there are write rpcs in flight to wait for. This
2536 * is a little silly as this object may not have any pending but
2537 * other objects sure might. */
2538 if (cli->cl_w_in_flight) {
2539 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2540 cfs_waitq_init(&ocw.ocw_waitq);
2544 loi_list_maint(cli, loi);
2545 osc_check_rpcs(cli);
2546 client_obd_list_unlock(&cli->cl_loi_list_lock);
2548 CDEBUG(D_CACHE, "sleeping for cache space\n");
2549 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2551 client_obd_list_lock(&cli->cl_loi_list_lock);
2552 if (!list_empty(&ocw.ocw_entry)) {
2553 list_del(&ocw.ocw_entry);
2562 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2563 struct lov_oinfo *loi, cfs_page_t *page,
2564 obd_off offset, struct obd_async_page_ops *ops,
2565 void *data, void **res, int nocache,
2566 struct lustre_handle *lockh)
2568 struct osc_async_page *oap;
2569 struct ldlm_res_id oid = {{0}};
2574 return size_round(sizeof(*oap));
2577 oap->oap_magic = OAP_MAGIC;
2578 oap->oap_cli = &exp->exp_obd->u.cli;
2581 oap->oap_caller_ops = ops;
2582 oap->oap_caller_data = data;
2584 oap->oap_page = page;
2585 oap->oap_obj_off = offset;
2587 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2588 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2589 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2590 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2592 oap->oap_occ.occ_interrupted = osc_occ_interrupted;
2594 spin_lock_init(&oap->oap_lock);
2596 /* If the page was marked as notcacheable - don't add to any locks */
2598 oid.name[0] = loi->loi_id;
2599 oid.name[2] = loi->loi_gr;
2600 /* This is the only place where we can call cache_add_extent
2601 without oap_lock, because this page is locked now, and
2602 the lock we are adding it to is referenced, so cannot lose
2603 any pages either. */
2604 rc = cache_add_extent(oap->oap_cli->cl_cache, &oid, oap, lockh);
2609 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2613 struct osc_async_page *oap_from_cookie(void *cookie)
2615 struct osc_async_page *oap = cookie;
2616 if (oap->oap_magic != OAP_MAGIC)
2617 return ERR_PTR(-EINVAL);
2621 static int osc_queue_async_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2622 struct lov_oinfo *loi, void *cookie,
2623 int cmd, obd_off off, int count,
2624 obd_flag brw_flags, enum async_flags async_flags)
2626 struct client_obd *cli = &exp->exp_obd->u.cli;
2627 struct osc_async_page *oap;
2631 oap = oap_from_cookie(cookie);
2633 RETURN(PTR_ERR(oap));
2635 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2638 if (!list_empty(&oap->oap_pending_item) ||
2639 !list_empty(&oap->oap_urgent_item) ||
2640 !list_empty(&oap->oap_rpc_item))
2643 /* check if the file's owner/group is over quota */
2644 #ifdef HAVE_QUOTA_SUPPORT
2645 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)){
2646 struct obd_async_page_ops *ops;
2653 ops = oap->oap_caller_ops;
2654 ops->ap_fill_obdo(oap->oap_caller_data, cmd, oa);
2655 if (lquota_chkdq(quota_interface, cli, oa->o_uid, oa->o_gid) ==
2666 loi = lsm->lsm_oinfo[0];
2668 client_obd_list_lock(&cli->cl_loi_list_lock);
2671 oap->oap_page_off = off;
2672 oap->oap_count = count;
2673 oap->oap_brw_flags = brw_flags;
2674 oap->oap_async_flags = async_flags;
2676 if (cmd & OBD_BRW_WRITE) {
2677 rc = osc_enter_cache(cli, loi, oap);
2679 client_obd_list_unlock(&cli->cl_loi_list_lock);
2684 osc_oap_to_pending(oap);
2685 loi_list_maint(cli, loi);
2687 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2690 osc_check_rpcs(cli);
2691 client_obd_list_unlock(&cli->cl_loi_list_lock);
2696 /* aka (~was & now & flag), but this is more clear :) */
2697 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2699 static int osc_set_async_flags(struct obd_export *exp,
2700 struct lov_stripe_md *lsm,
2701 struct lov_oinfo *loi, void *cookie,
2702 obd_flag async_flags)
2704 struct client_obd *cli = &exp->exp_obd->u.cli;
2705 struct loi_oap_pages *lop;
2706 struct osc_async_page *oap;
2710 oap = oap_from_cookie(cookie);
2712 RETURN(PTR_ERR(oap));
2715 * bug 7311: OST-side locking is only supported for liblustre for now
2716 * (and liblustre never calls obd_set_async_flags(). I hope.), generic
2717 * implementation has to handle case where OST-locked page was picked
2718 * up by, e.g., ->writepage().
2720 LASSERT(!(oap->oap_brw_flags & OBD_BRW_SRVLOCK));
2721 LASSERT(!LIBLUSTRE_CLIENT); /* check that liblustre angels do fear to
2724 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2728 loi = lsm->lsm_oinfo[0];
2730 if (oap->oap_cmd & OBD_BRW_WRITE) {
2731 lop = &loi->loi_write_lop;
2733 lop = &loi->loi_read_lop;
2736 client_obd_list_lock(&cli->cl_loi_list_lock);
2738 if (list_empty(&oap->oap_pending_item))
2739 GOTO(out, rc = -EINVAL);
2741 if ((oap->oap_async_flags & async_flags) == async_flags)
2744 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2745 oap->oap_async_flags |= ASYNC_READY;
2747 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT)) {
2748 if (list_empty(&oap->oap_rpc_item)) {
2749 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2750 loi_list_maint(cli, loi);
2754 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2755 oap->oap_async_flags);
2757 osc_check_rpcs(cli);
2758 client_obd_list_unlock(&cli->cl_loi_list_lock);
2762 static int osc_queue_group_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2763 struct lov_oinfo *loi,
2764 struct obd_io_group *oig, void *cookie,
2765 int cmd, obd_off off, int count,
2767 obd_flag async_flags)
2769 struct client_obd *cli = &exp->exp_obd->u.cli;
2770 struct osc_async_page *oap;
2771 struct loi_oap_pages *lop;
2775 oap = oap_from_cookie(cookie);
2777 RETURN(PTR_ERR(oap));
2779 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2782 if (!list_empty(&oap->oap_pending_item) ||
2783 !list_empty(&oap->oap_urgent_item) ||
2784 !list_empty(&oap->oap_rpc_item))
2788 loi = lsm->lsm_oinfo[0];
2790 client_obd_list_lock(&cli->cl_loi_list_lock);
2793 oap->oap_page_off = off;
2794 oap->oap_count = count;
2795 oap->oap_brw_flags = brw_flags;
2796 oap->oap_async_flags = async_flags;
2798 if (cmd & OBD_BRW_WRITE)
2799 lop = &loi->loi_write_lop;
2801 lop = &loi->loi_read_lop;
2803 list_add_tail(&oap->oap_pending_item, &lop->lop_pending_group);
2804 if (oap->oap_async_flags & ASYNC_GROUP_SYNC) {
2806 rc = oig_add_one(oig, &oap->oap_occ);
2809 LOI_DEBUG(loi, "oap %p page %p on group pending: rc %d\n",
2810 oap, oap->oap_page, rc);
2812 client_obd_list_unlock(&cli->cl_loi_list_lock);
2817 static void osc_group_to_pending(struct client_obd *cli, struct lov_oinfo *loi,
2818 struct loi_oap_pages *lop, int cmd)
2820 struct list_head *pos, *tmp;
2821 struct osc_async_page *oap;
2823 list_for_each_safe(pos, tmp, &lop->lop_pending_group) {
2824 oap = list_entry(pos, struct osc_async_page, oap_pending_item);
2825 list_del(&oap->oap_pending_item);
2826 osc_oap_to_pending(oap);
2828 loi_list_maint(cli, loi);
2831 static int osc_trigger_group_io(struct obd_export *exp,
2832 struct lov_stripe_md *lsm,
2833 struct lov_oinfo *loi,
2834 struct obd_io_group *oig)
2836 struct client_obd *cli = &exp->exp_obd->u.cli;
2840 loi = lsm->lsm_oinfo[0];
2842 client_obd_list_lock(&cli->cl_loi_list_lock);
2844 osc_group_to_pending(cli, loi, &loi->loi_write_lop, OBD_BRW_WRITE);
2845 osc_group_to_pending(cli, loi, &loi->loi_read_lop, OBD_BRW_READ);
2847 osc_check_rpcs(cli);
2848 client_obd_list_unlock(&cli->cl_loi_list_lock);
2853 static int osc_teardown_async_page(struct obd_export *exp,
2854 struct lov_stripe_md *lsm,
2855 struct lov_oinfo *loi, void *cookie)
2857 struct client_obd *cli = &exp->exp_obd->u.cli;
2858 struct loi_oap_pages *lop;
2859 struct osc_async_page *oap;
2863 oap = oap_from_cookie(cookie);
2865 RETURN(PTR_ERR(oap));
2868 loi = lsm->lsm_oinfo[0];
2870 if (oap->oap_cmd & OBD_BRW_WRITE) {
2871 lop = &loi->loi_write_lop;
2873 lop = &loi->loi_read_lop;
2876 client_obd_list_lock(&cli->cl_loi_list_lock);
2878 if (!list_empty(&oap->oap_rpc_item))
2879 GOTO(out, rc = -EBUSY);
2881 osc_exit_cache(cli, oap, 0);
2882 osc_wake_cache_waiters(cli);
2884 if (!list_empty(&oap->oap_urgent_item)) {
2885 list_del_init(&oap->oap_urgent_item);
2886 oap->oap_async_flags &= ~ASYNC_URGENT;
2888 if (!list_empty(&oap->oap_pending_item)) {
2889 list_del_init(&oap->oap_pending_item);
2890 lop_update_pending(cli, lop, oap->oap_cmd, -1);
2892 loi_list_maint(cli, loi);
2893 cache_remove_extent(cli->cl_cache, oap);
2895 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
2897 client_obd_list_unlock(&cli->cl_loi_list_lock);
2901 int osc_extent_blocking_cb(struct ldlm_lock *lock,
2902 struct ldlm_lock_desc *new, void *data,
2905 struct lustre_handle lockh = { 0 };
2909 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
2910 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
2915 case LDLM_CB_BLOCKING:
2916 ldlm_lock2handle(lock, &lockh);
2917 rc = ldlm_cli_cancel(&lockh);
2919 CERROR("ldlm_cli_cancel failed: %d\n", rc);
2921 case LDLM_CB_CANCELING: {
2923 ldlm_lock2handle(lock, &lockh);
2924 /* This lock wasn't granted, don't try to do anything */
2925 if (lock->l_req_mode != lock->l_granted_mode)
2928 cache_remove_lock(lock->l_conn_export->exp_obd->u.cli.cl_cache,
2931 if (lock->l_conn_export->exp_obd->u.cli.cl_ext_lock_cancel_cb)
2932 lock->l_conn_export->exp_obd->u.cli.cl_ext_lock_cancel_cb(
2933 lock, new, data,flag);
2942 EXPORT_SYMBOL(osc_extent_blocking_cb);
2944 static void osc_set_data_with_check(struct lustre_handle *lockh, void *data,
2947 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2950 CERROR("lockh %p, data %p - client evicted?\n", lockh, data);
2953 lock_res_and_lock(lock);
2954 #if defined (__KERNEL__) && defined (__linux__)
2955 /* Liang XXX: Darwin and Winnt checking should be added */
2956 if (lock->l_ast_data && lock->l_ast_data != data) {
2957 struct inode *new_inode = data;
2958 struct inode *old_inode = lock->l_ast_data;
2959 if (!(old_inode->i_state & I_FREEING))
2960 LDLM_ERROR(lock, "inconsistent l_ast_data found");
2961 LASSERTF(old_inode->i_state & I_FREEING,
2962 "Found existing inode %p/%lu/%u state %lu in lock: "
2963 "setting data to %p/%lu/%u\n", old_inode,
2964 old_inode->i_ino, old_inode->i_generation,
2966 new_inode, new_inode->i_ino, new_inode->i_generation);
2969 lock->l_ast_data = data;
2970 lock->l_flags |= (flags & LDLM_FL_NO_LRU);
2971 unlock_res_and_lock(lock);
2972 LDLM_LOCK_PUT(lock);
2975 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2976 ldlm_iterator_t replace, void *data)
2978 struct ldlm_res_id res_id = { .name = {0} };
2979 struct obd_device *obd = class_exp2obd(exp);
2981 res_id.name[0] = lsm->lsm_object_id;
2982 res_id.name[2] = lsm->lsm_object_gr;
2984 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2988 static int osc_enqueue_fini(struct obd_device *obd, struct ptlrpc_request *req,
2989 struct obd_info *oinfo, int intent, int rc)
2994 /* The request was created before ldlm_cli_enqueue call. */
2995 if (rc == ELDLM_LOCK_ABORTED) {
2996 struct ldlm_reply *rep;
2997 rep = req_capsule_server_get(&req->rq_pill,
3000 LASSERT(rep != NULL);
3001 if (rep->lock_policy_res1)
3002 rc = rep->lock_policy_res1;
3006 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3007 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3008 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_size,
3009 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_blocks,
3010 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_mtime);
3014 cache_add_lock(obd->u.cli.cl_cache, oinfo->oi_lockh);
3016 /* Call the update callback. */
3017 rc = oinfo->oi_cb_up(oinfo, rc);
3021 static int osc_enqueue_interpret(struct ptlrpc_request *req,
3022 struct osc_enqueue_args *aa, int rc)
3024 int intent = aa->oa_oi->oi_flags & LDLM_FL_HAS_INTENT;
3025 struct lov_stripe_md *lsm = aa->oa_oi->oi_md;
3026 struct ldlm_lock *lock;
3028 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3030 lock = ldlm_handle2lock(aa->oa_oi->oi_lockh);
3032 /* Complete obtaining the lock procedure. */
3033 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3035 &aa->oa_oi->oi_flags,
3036 &lsm->lsm_oinfo[0]->loi_lvb,
3037 sizeof(lsm->lsm_oinfo[0]->loi_lvb),
3038 lustre_swab_ost_lvb,
3039 aa->oa_oi->oi_lockh, rc);
3041 /* Complete osc stuff. */
3042 rc = osc_enqueue_fini(aa->oa_exp->exp_obd, req, aa->oa_oi, intent, rc);
3044 /* Release the lock for async request. */
3045 if (lustre_handle_is_used(aa->oa_oi->oi_lockh) && rc == ELDLM_OK)
3046 ldlm_lock_decref(aa->oa_oi->oi_lockh, aa->oa_ei->ei_mode);
3048 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3049 aa->oa_oi->oi_lockh, req, aa);
3050 LDLM_LOCK_PUT(lock);
3054 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3055 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3056 * other synchronous requests, however keeping some locks and trying to obtain
3057 * others may take a considerable amount of time in a case of ost failure; and
3058 * when other sync requests do not get released lock from a client, the client
3059 * is excluded from the cluster -- such scenarious make the life difficult, so
3060 * release locks just after they are obtained. */
3061 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3062 struct ldlm_enqueue_info *einfo,
3063 struct ptlrpc_request_set *rqset)
3065 struct ldlm_res_id res_id = { .name = {0} };
3066 struct obd_device *obd = exp->exp_obd;
3067 struct ptlrpc_request *req = NULL;
3068 int intent = oinfo->oi_flags & LDLM_FL_HAS_INTENT;
3073 res_id.name[0] = oinfo->oi_md->lsm_object_id;
3074 res_id.name[2] = oinfo->oi_md->lsm_object_gr;
3076 /* Filesystem lock extents are extended to page boundaries so that
3077 * dealing with the page cache is a little smoother. */
3078 oinfo->oi_policy.l_extent.start -=
3079 oinfo->oi_policy.l_extent.start & ~CFS_PAGE_MASK;
3080 oinfo->oi_policy.l_extent.end |= ~CFS_PAGE_MASK;
3082 if (oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid == 0)
3085 /* Next, search for already existing extent locks that will cover us */
3086 /* If we're trying to read, we also search for an existing PW lock. The
3087 * VFS and page cache already protect us locally, so lots of readers/
3088 * writers can share a single PW lock.
3090 * There are problems with conversion deadlocks, so instead of
3091 * converting a read lock to a write lock, we'll just enqueue a new
3094 * At some point we should cancel the read lock instead of making them
3095 * send us a blocking callback, but there are problems with canceling
3096 * locks out from other users right now, too. */
3097 mode = einfo->ei_mode;
3098 if (einfo->ei_mode == LCK_PR)
3100 mode = ldlm_lock_match(obd->obd_namespace,
3101 oinfo->oi_flags | LDLM_FL_LVB_READY, &res_id,
3102 einfo->ei_type, &oinfo->oi_policy, mode,
3105 /* addref the lock only if not async requests and PW lock is
3106 * matched whereas we asked for PR. */
3107 if (!rqset && einfo->ei_mode != mode)
3108 ldlm_lock_addref(oinfo->oi_lockh, LCK_PR);
3109 osc_set_data_with_check(oinfo->oi_lockh, einfo->ei_cbdata,
3112 /* I would like to be able to ASSERT here that rss <=
3113 * kms, but I can't, for reasons which are explained in
3117 /* We already have a lock, and it's referenced */
3118 oinfo->oi_cb_up(oinfo, ELDLM_OK);
3120 /* For async requests, decref the lock. */
3121 if (einfo->ei_mode != mode)
3122 ldlm_lock_decref(oinfo->oi_lockh, LCK_PW);
3124 ldlm_lock_decref(oinfo->oi_lockh, einfo->ei_mode);
3131 CFS_LIST_HEAD(cancels);
3132 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3133 &RQF_LDLM_ENQUEUE_LVB);
3137 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
3141 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
3142 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb));
3143 ptlrpc_request_set_replen(req);
3146 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3147 oinfo->oi_flags &= ~LDLM_FL_BLOCK_GRANTED;
3149 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id,
3150 &oinfo->oi_policy, &oinfo->oi_flags,
3151 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3152 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb),
3153 lustre_swab_ost_lvb, oinfo->oi_lockh,
3157 struct osc_enqueue_args *aa;
3158 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3159 aa = (struct osc_enqueue_args *)&req->rq_async_args;
3164 req->rq_interpret_reply = osc_enqueue_interpret;
3165 ptlrpc_set_add_req(rqset, req);
3166 } else if (intent) {
3167 ptlrpc_req_finished(req);
3172 rc = osc_enqueue_fini(obd, req, oinfo, intent, rc);
3174 ptlrpc_req_finished(req);
3179 static int osc_match(struct obd_export *exp, struct lov_stripe_md *lsm,
3180 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3181 int *flags, void *data, struct lustre_handle *lockh)
3183 struct ldlm_res_id res_id = { .name = {0} };
3184 struct obd_device *obd = exp->exp_obd;
3185 int lflags = *flags;
3189 res_id.name[0] = lsm->lsm_object_id;
3190 res_id.name[2] = lsm->lsm_object_gr;
3192 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3195 /* Filesystem lock extents are extended to page boundaries so that
3196 * dealing with the page cache is a little smoother */
3197 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3198 policy->l_extent.end |= ~CFS_PAGE_MASK;
3200 /* Next, search for already existing extent locks that will cover us */
3201 /* If we're trying to read, we also search for an existing PW lock. The
3202 * VFS and page cache already protect us locally, so lots of readers/
3203 * writers can share a single PW lock. */
3207 rc = ldlm_lock_match(obd->obd_namespace, lflags | LDLM_FL_LVB_READY,
3208 &res_id, type, policy, rc, lockh);
3210 osc_set_data_with_check(lockh, data, lflags);
3211 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3212 ldlm_lock_addref(lockh, LCK_PR);
3213 ldlm_lock_decref(lockh, LCK_PW);
3220 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3221 __u32 mode, struct lustre_handle *lockh)
3225 if (unlikely(mode == LCK_GROUP))
3226 ldlm_lock_decref_and_cancel(lockh, mode);
3228 ldlm_lock_decref(lockh, mode);
3233 static int osc_cancel_unused(struct obd_export *exp,
3234 struct lov_stripe_md *lsm, int flags,
3237 struct obd_device *obd = class_exp2obd(exp);
3238 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3241 res_id.name[0] = lsm->lsm_object_id;
3242 res_id.name[2] = lsm->lsm_object_gr;
3246 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3249 static int osc_join_lru(struct obd_export *exp,
3250 struct lov_stripe_md *lsm, int join)
3252 struct obd_device *obd = class_exp2obd(exp);
3253 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3256 res_id.name[0] = lsm->lsm_object_id;
3257 res_id.name[2] = lsm->lsm_object_gr;
3261 return ldlm_cli_join_lru(obd->obd_namespace, resp, join);
3264 static int osc_statfs_interpret(struct ptlrpc_request *req,
3265 struct osc_async_args *aa, int rc)
3267 struct obd_statfs *msfs;
3273 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3275 GOTO(out, rc = -EPROTO);
3278 *aa->aa_oi->oi_osfs = *msfs;
3280 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3284 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3285 __u64 max_age, struct ptlrpc_request_set *rqset)
3287 struct ptlrpc_request *req;
3288 struct osc_async_args *aa;
3292 /* We could possibly pass max_age in the request (as an absolute
3293 * timestamp or a "seconds.usec ago") so the target can avoid doing
3294 * extra calls into the filesystem if that isn't necessary (e.g.
3295 * during mount that would help a bit). Having relative timestamps
3296 * is not so great if request processing is slow, while absolute
3297 * timestamps are not ideal because they need time synchronization. */
3298 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3302 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3304 ptlrpc_request_free(req);
3307 ptlrpc_request_set_replen(req);
3308 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3309 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3310 /* procfs requests not want stat in wait for avoid deadlock */
3311 req->rq_no_resend = 1;
3312 req->rq_no_delay = 1;
3315 req->rq_interpret_reply = osc_statfs_interpret;
3316 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3317 aa = (struct osc_async_args *)&req->rq_async_args;
3320 ptlrpc_set_add_req(rqset, req);
3324 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3325 __u64 max_age, __u32 flags)
3327 struct obd_statfs *msfs;
3328 struct ptlrpc_request *req;
3332 /* We could possibly pass max_age in the request (as an absolute
3333 * timestamp or a "seconds.usec ago") so the target can avoid doing
3334 * extra calls into the filesystem if that isn't necessary (e.g.
3335 * during mount that would help a bit). Having relative timestamps
3336 * is not so great if request processing is slow, while absolute
3337 * timestamps are not ideal because they need time synchronization. */
3338 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
3342 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
3344 ptlrpc_request_free(req);
3347 ptlrpc_request_set_replen(req);
3348 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3350 if (flags & OBD_STATFS_NODELAY) {
3351 /* procfs requests not want stat in wait for avoid deadlock */
3352 req->rq_no_resend = 1;
3353 req->rq_no_delay = 1;
3356 rc = ptlrpc_queue_wait(req);
3360 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
3362 GOTO(out, rc = -EPROTO);
3369 ptlrpc_req_finished(req);
3373 /* Retrieve object striping information.
3375 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3376 * the maximum number of OST indices which will fit in the user buffer.
3377 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3379 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3381 struct lov_user_md lum, *lumk;
3382 int rc = 0, lum_size;
3388 if (copy_from_user(&lum, lump, sizeof(lum)))
3391 if (lum.lmm_magic != LOV_USER_MAGIC)
3394 if (lum.lmm_stripe_count > 0) {
3395 lum_size = sizeof(lum) + sizeof(lum.lmm_objects[0]);
3396 OBD_ALLOC(lumk, lum_size);
3400 lumk->lmm_objects[0].l_object_id = lsm->lsm_object_id;
3401 lumk->lmm_objects[0].l_object_gr = lsm->lsm_object_gr;
3403 lum_size = sizeof(lum);
3407 lumk->lmm_object_id = lsm->lsm_object_id;
3408 lumk->lmm_object_gr = lsm->lsm_object_gr;
3409 lumk->lmm_stripe_count = 1;
3411 if (copy_to_user(lump, lumk, lum_size))
3415 OBD_FREE(lumk, lum_size);
3421 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3422 void *karg, void *uarg)
3424 struct obd_device *obd = exp->exp_obd;
3425 struct obd_ioctl_data *data = karg;
3429 if (!try_module_get(THIS_MODULE)) {
3430 CERROR("Can't get module. Is it alive?");
3434 case OBD_IOC_LOV_GET_CONFIG: {
3436 struct lov_desc *desc;
3437 struct obd_uuid uuid;
3441 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3442 GOTO(out, err = -EINVAL);
3444 data = (struct obd_ioctl_data *)buf;
3446 if (sizeof(*desc) > data->ioc_inllen1) {
3447 obd_ioctl_freedata(buf, len);
3448 GOTO(out, err = -EINVAL);
3451 if (data->ioc_inllen2 < sizeof(uuid)) {
3452 obd_ioctl_freedata(buf, len);
3453 GOTO(out, err = -EINVAL);
3456 desc = (struct lov_desc *)data->ioc_inlbuf1;
3457 desc->ld_tgt_count = 1;
3458 desc->ld_active_tgt_count = 1;
3459 desc->ld_default_stripe_count = 1;
3460 desc->ld_default_stripe_size = 0;
3461 desc->ld_default_stripe_offset = 0;
3462 desc->ld_pattern = 0;
3463 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3465 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3467 err = copy_to_user((void *)uarg, buf, len);
3470 obd_ioctl_freedata(buf, len);
3473 case LL_IOC_LOV_SETSTRIPE:
3474 err = obd_alloc_memmd(exp, karg);
3478 case LL_IOC_LOV_GETSTRIPE:
3479 err = osc_getstripe(karg, uarg);
3481 case OBD_IOC_CLIENT_RECOVER:
3482 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3487 case IOC_OSC_SET_ACTIVE:
3488 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3491 case OBD_IOC_POLL_QUOTACHECK:
3492 err = lquota_poll_check(quota_interface, exp,
3493 (struct if_quotacheck *)karg);
3496 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3497 cmd, cfs_curproc_comm());
3498 GOTO(out, err = -ENOTTY);
3501 module_put(THIS_MODULE);
3505 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3506 void *key, __u32 *vallen, void *val)
3509 if (!vallen || !val)
3512 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3513 __u32 *stripe = val;
3514 *vallen = sizeof(*stripe);
3517 } else if (KEY_IS(KEY_LAST_ID)) {
3518 struct ptlrpc_request *req;
3523 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3524 &RQF_OST_GET_INFO_LAST_ID);
3528 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3529 RCL_CLIENT, keylen);
3530 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3532 ptlrpc_request_free(req);
3536 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3537 memcpy(tmp, key, keylen);
3539 ptlrpc_request_set_replen(req);
3540 rc = ptlrpc_queue_wait(req);
3544 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3546 GOTO(out, rc = -EPROTO);
3548 *((obd_id *)val) = *reply;
3550 ptlrpc_req_finished(req);
3556 static int osc_setinfo_mds_conn_interpret(struct ptlrpc_request *req,
3559 struct llog_ctxt *ctxt;
3560 struct obd_import *imp = req->rq_import;
3566 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3569 rc = llog_initiator_connect(ctxt);
3571 CERROR("cannot establish connection for "
3572 "ctxt %p: %d\n", ctxt, rc);
3575 llog_ctxt_put(ctxt);
3576 spin_lock(&imp->imp_lock);
3577 imp->imp_server_timeout = 1;
3578 imp->imp_pingable = 1;
3579 spin_unlock(&imp->imp_lock);
3580 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3585 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3586 void *key, obd_count vallen, void *val,
3587 struct ptlrpc_request_set *set)
3589 struct ptlrpc_request *req;
3590 struct obd_device *obd = exp->exp_obd;
3591 struct obd_import *imp = class_exp2cliimp(exp);
3596 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3598 if (KEY_IS(KEY_NEXT_ID)) {
3599 if (vallen != sizeof(obd_id))
3603 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3604 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3605 exp->exp_obd->obd_name,
3606 obd->u.cli.cl_oscc.oscc_next_id);
3611 if (KEY_IS("unlinked")) {
3612 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3613 spin_lock(&oscc->oscc_lock);
3614 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3615 spin_unlock(&oscc->oscc_lock);
3619 if (KEY_IS(KEY_INIT_RECOV)) {
3620 if (vallen != sizeof(int))
3622 spin_lock(&imp->imp_lock);
3623 imp->imp_initial_recov = *(int *)val;
3624 spin_unlock(&imp->imp_lock);
3625 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3626 exp->exp_obd->obd_name,
3627 imp->imp_initial_recov);
3631 if (KEY_IS("checksum")) {
3632 if (vallen != sizeof(int))
3634 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3638 if (KEY_IS(KEY_FLUSH_CTX)) {
3639 sptlrpc_import_flush_my_ctx(imp);
3646 /* We pass all other commands directly to OST. Since nobody calls osc
3647 methods directly and everybody is supposed to go through LOV, we
3648 assume lov checked invalid values for us.
3649 The only recognised values so far are evict_by_nid and mds_conn.
3650 Even if something bad goes through, we'd get a -EINVAL from OST
3654 req = ptlrpc_request_alloc(imp, &RQF_OST_SET_INFO);
3658 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3659 RCL_CLIENT, keylen);
3660 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3661 RCL_CLIENT, vallen);
3662 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3664 ptlrpc_request_free(req);
3668 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3669 memcpy(tmp, key, keylen);
3670 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
3671 memcpy(tmp, val, vallen);
3673 if (KEY_IS(KEY_MDS_CONN)) {
3674 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3676 oscc->oscc_oa.o_gr = (*(__u32 *)val);
3677 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
3678 LASSERT(oscc->oscc_oa.o_gr > 0);
3679 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3682 ptlrpc_request_set_replen(req);
3683 ptlrpc_set_add_req(set, req);
3684 ptlrpc_check_set(set);
3690 static struct llog_operations osc_size_repl_logops = {
3691 lop_cancel: llog_obd_repl_cancel
3694 static struct llog_operations osc_mds_ost_orig_logops;
3695 static int osc_llog_init(struct obd_device *obd, int group,
3696 struct obd_device *tgt, int count,
3697 struct llog_catid *catid, struct obd_uuid *uuid)
3701 LASSERT(group == OBD_LLOG_GROUP);
3702 spin_lock(&obd->obd_dev_lock);
3703 if (osc_mds_ost_orig_logops.lop_setup != llog_obd_origin_setup) {
3704 osc_mds_ost_orig_logops = llog_lvfs_ops;
3705 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
3706 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
3707 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
3708 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
3710 spin_unlock(&obd->obd_dev_lock);
3712 rc = llog_setup(obd, &obd->obd_olg, LLOG_MDS_OST_ORIG_CTXT, tgt, count,
3713 &catid->lci_logid, &osc_mds_ost_orig_logops);
3715 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
3719 rc = llog_setup(obd, &obd->obd_olg, LLOG_SIZE_REPL_CTXT, tgt, count,
3720 NULL, &osc_size_repl_logops);
3722 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
3725 CERROR("osc '%s' tgt '%s' cnt %d catid %p rc=%d\n",
3726 obd->obd_name, tgt->obd_name, count, catid, rc);
3727 CERROR("logid "LPX64":0x%x\n",
3728 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
3733 static int osc_llog_finish(struct obd_device *obd, int count)
3735 struct llog_ctxt *ctxt;
3736 int rc = 0, rc2 = 0;
3739 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3741 rc = llog_cleanup(ctxt);
3743 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3745 rc2 = llog_cleanup(ctxt);
3752 static int osc_reconnect(const struct lu_env *env,
3753 struct obd_export *exp, struct obd_device *obd,
3754 struct obd_uuid *cluuid,
3755 struct obd_connect_data *data)
3757 struct client_obd *cli = &obd->u.cli;
3759 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3762 client_obd_list_lock(&cli->cl_loi_list_lock);
3763 data->ocd_grant = cli->cl_avail_grant ?:
3764 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
3765 lost_grant = cli->cl_lost_grant;
3766 cli->cl_lost_grant = 0;
3767 client_obd_list_unlock(&cli->cl_loi_list_lock);
3769 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
3770 "cl_lost_grant: %ld\n", data->ocd_grant,
3771 cli->cl_avail_grant, lost_grant);
3772 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
3773 " ocd_grant: %d\n", data->ocd_connect_flags,
3774 data->ocd_version, data->ocd_grant);
3780 static int osc_disconnect(struct obd_export *exp)
3782 struct obd_device *obd = class_exp2obd(exp);
3783 struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3786 if (obd->u.cli.cl_conn_count == 1)
3787 /* flush any remaining cancel messages out to the target */
3788 llog_sync(ctxt, exp);
3790 llog_ctxt_put(ctxt);
3792 rc = client_disconnect_export(exp);
3796 static int osc_import_event(struct obd_device *obd,
3797 struct obd_import *imp,
3798 enum obd_import_event event)
3800 struct client_obd *cli;
3804 LASSERT(imp->imp_obd == obd);
3807 case IMP_EVENT_DISCON: {
3808 /* Only do this on the MDS OSC's */
3809 if (imp->imp_server_timeout) {
3810 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3812 spin_lock(&oscc->oscc_lock);
3813 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
3814 spin_unlock(&oscc->oscc_lock);
3817 client_obd_list_lock(&cli->cl_loi_list_lock);
3818 cli->cl_avail_grant = 0;
3819 cli->cl_lost_grant = 0;
3820 client_obd_list_unlock(&cli->cl_loi_list_lock);
3823 case IMP_EVENT_INACTIVE: {
3824 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
3827 case IMP_EVENT_INVALIDATE: {
3828 struct ldlm_namespace *ns = obd->obd_namespace;
3832 client_obd_list_lock(&cli->cl_loi_list_lock);
3833 /* all pages go to failing rpcs due to the invalid import */
3834 osc_check_rpcs(cli);
3835 client_obd_list_unlock(&cli->cl_loi_list_lock);
3837 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3841 case IMP_EVENT_ACTIVE: {
3842 /* Only do this on the MDS OSC's */
3843 if (imp->imp_server_timeout) {
3844 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3846 spin_lock(&oscc->oscc_lock);
3847 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3848 spin_unlock(&oscc->oscc_lock);
3850 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3853 case IMP_EVENT_OCD: {
3854 struct obd_connect_data *ocd = &imp->imp_connect_data;
3856 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3857 osc_init_grant(&obd->u.cli, ocd);
3860 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3861 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3863 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3867 CERROR("Unknown import event %d\n", event);
3873 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3879 rc = ptlrpcd_addref();
3883 rc = client_obd_setup(obd, lcfg);
3887 struct lprocfs_static_vars lvars = { 0 };
3888 struct client_obd *cli = &obd->u.cli;
3890 lprocfs_osc_init_vars(&lvars);
3891 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
3892 lproc_osc_attach_seqstat(obd);
3893 sptlrpc_lprocfs_cliobd_attach(obd);
3894 ptlrpc_lprocfs_register_obd(obd);
3898 /* We need to allocate a few requests more, because
3899 brw_interpret_oap tries to create new requests before freeing
3900 previous ones. Ideally we want to have 2x max_rpcs_in_flight
3901 reserved, but I afraid that might be too much wasted RAM
3902 in fact, so 2 is just my guess and still should work. */
3903 cli->cl_import->imp_rq_pool =
3904 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3906 ptlrpc_add_rqs_to_pool);
3907 cli->cl_cache = cache_create(obd);
3908 if (!cli->cl_cache) {
3917 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3923 case OBD_CLEANUP_EARLY: {
3924 struct obd_import *imp;
3925 imp = obd->u.cli.cl_import;
3926 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3927 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3928 ptlrpc_deactivate_import(imp);
3929 spin_lock(&imp->imp_lock);
3930 imp->imp_pingable = 0;
3931 spin_unlock(&imp->imp_lock);
3934 case OBD_CLEANUP_EXPORTS: {
3935 /* If we set up but never connected, the
3936 client import will not have been cleaned. */
3937 if (obd->u.cli.cl_import) {
3938 struct obd_import *imp;
3939 imp = obd->u.cli.cl_import;
3940 CDEBUG(D_CONFIG, "%s: client import never connected\n",
3942 ptlrpc_invalidate_import(imp);
3943 ptlrpc_free_rq_pool(imp->imp_rq_pool);
3944 class_destroy_import(imp);
3945 obd->u.cli.cl_import = NULL;
3949 case OBD_CLEANUP_SELF_EXP:
3950 rc = obd_llog_finish(obd, 0);
3952 CERROR("failed to cleanup llogging subsystems\n");
3954 case OBD_CLEANUP_OBD:
3960 int osc_cleanup(struct obd_device *obd)
3962 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3966 ptlrpc_lprocfs_unregister_obd(obd);
3967 lprocfs_obd_cleanup(obd);
3969 spin_lock(&oscc->oscc_lock);
3970 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
3971 oscc->oscc_flags |= OSCC_FLAG_EXITING;
3972 spin_unlock(&oscc->oscc_lock);
3974 /* free memory of osc quota cache */
3975 lquota_cleanup(quota_interface, obd);
3977 cache_destroy(obd->u.cli.cl_cache);
3978 rc = client_obd_cleanup(obd);
3984 static int osc_register_page_removal_cb(struct obd_export *exp,
3985 obd_page_removal_cb_t func,
3986 obd_pin_extent_cb pin_cb)
3988 return cache_add_extent_removal_cb(exp->exp_obd->u.cli.cl_cache, func,
3992 static int osc_unregister_page_removal_cb(struct obd_export *exp,
3993 obd_page_removal_cb_t func)
3995 return cache_del_extent_removal_cb(exp->exp_obd->u.cli.cl_cache, func);
3998 static int osc_register_lock_cancel_cb(struct obd_export *exp,
3999 obd_lock_cancel_cb cb)
4001 LASSERT(exp->exp_obd->u.cli.cl_ext_lock_cancel_cb == NULL);
4003 exp->exp_obd->u.cli.cl_ext_lock_cancel_cb = cb;
4007 static int osc_unregister_lock_cancel_cb(struct obd_export *exp,
4008 obd_lock_cancel_cb cb)
4010 if (exp->exp_obd->u.cli.cl_ext_lock_cancel_cb != cb) {
4011 CERROR("Unregistering cancel cb %p, while only %p was "
4013 exp->exp_obd->u.cli.cl_ext_lock_cancel_cb);
4017 exp->exp_obd->u.cli.cl_ext_lock_cancel_cb = NULL;
4021 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4023 struct lustre_cfg *lcfg = buf;
4024 struct lprocfs_static_vars lvars = { 0 };
4027 lprocfs_osc_init_vars(&lvars);
4029 switch (lcfg->lcfg_command) {
4030 case LCFG_SPTLRPC_CONF:
4031 rc = sptlrpc_cliobd_process_config(obd, lcfg);
4034 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
4042 struct obd_ops osc_obd_ops = {
4043 .o_owner = THIS_MODULE,
4044 .o_setup = osc_setup,
4045 .o_precleanup = osc_precleanup,
4046 .o_cleanup = osc_cleanup,
4047 .o_add_conn = client_import_add_conn,
4048 .o_del_conn = client_import_del_conn,
4049 .o_connect = client_connect_import,
4050 .o_reconnect = osc_reconnect,
4051 .o_disconnect = osc_disconnect,
4052 .o_statfs = osc_statfs,
4053 .o_statfs_async = osc_statfs_async,
4054 .o_packmd = osc_packmd,
4055 .o_unpackmd = osc_unpackmd,
4056 .o_precreate = osc_precreate,
4057 .o_create = osc_create,
4058 .o_destroy = osc_destroy,
4059 .o_getattr = osc_getattr,
4060 .o_getattr_async = osc_getattr_async,
4061 .o_setattr = osc_setattr,
4062 .o_setattr_async = osc_setattr_async,
4064 .o_brw_async = osc_brw_async,
4065 .o_prep_async_page = osc_prep_async_page,
4066 .o_queue_async_io = osc_queue_async_io,
4067 .o_set_async_flags = osc_set_async_flags,
4068 .o_queue_group_io = osc_queue_group_io,
4069 .o_trigger_group_io = osc_trigger_group_io,
4070 .o_teardown_async_page = osc_teardown_async_page,
4071 .o_punch = osc_punch,
4073 .o_enqueue = osc_enqueue,
4074 .o_match = osc_match,
4075 .o_change_cbdata = osc_change_cbdata,
4076 .o_cancel = osc_cancel,
4077 .o_cancel_unused = osc_cancel_unused,
4078 .o_join_lru = osc_join_lru,
4079 .o_iocontrol = osc_iocontrol,
4080 .o_get_info = osc_get_info,
4081 .o_set_info_async = osc_set_info_async,
4082 .o_import_event = osc_import_event,
4083 .o_llog_init = osc_llog_init,
4084 .o_llog_finish = osc_llog_finish,
4085 .o_process_config = osc_process_config,
4086 .o_register_page_removal_cb = osc_register_page_removal_cb,
4087 .o_unregister_page_removal_cb = osc_unregister_page_removal_cb,
4088 .o_register_lock_cancel_cb = osc_register_lock_cancel_cb,
4089 .o_unregister_lock_cancel_cb = osc_unregister_lock_cancel_cb,
4091 int __init osc_init(void)
4093 struct lprocfs_static_vars lvars = { 0 };
4097 lprocfs_osc_init_vars(&lvars);
4099 request_module("lquota");
4100 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4101 lquota_init(quota_interface);
4102 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4104 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
4105 LUSTRE_OSC_NAME, NULL);
4107 if (quota_interface)
4108 PORTAL_SYMBOL_PUT(osc_quota_interface);
4116 static void /*__exit*/ osc_exit(void)
4118 lquota_exit(quota_interface);
4119 if (quota_interface)
4120 PORTAL_SYMBOL_PUT(osc_quota_interface);
4122 class_unregister_type(LUSTRE_OSC_NAME);
4125 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
4126 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4127 MODULE_LICENSE("GPL");
4129 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob