1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_OSC
43 # include <libcfs/libcfs.h>
44 #else /* __KERNEL__ */
45 # include <liblustre.h>
48 # include <lustre_dlm.h>
49 #include <libcfs/kp30.h>
50 #include <lustre_net.h>
51 #include <lustre/lustre_user.h>
59 #include <lustre_ha.h>
60 #include <lprocfs_status.h>
61 #include <lustre_log.h>
62 #include <lustre_debug.h>
63 #include <lustre_param.h>
64 #include <lustre_cache.h>
65 #include "osc_internal.h"
67 static quota_interface_t *quota_interface = NULL;
68 extern quota_interface_t osc_quota_interface;
70 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
71 static int brw_interpret(struct ptlrpc_request *request, void *data, int rc);
72 int osc_cleanup(struct obd_device *obd);
74 static quota_interface_t *quota_interface;
75 extern quota_interface_t osc_quota_interface;
78 atomic_t osc_resend_time;
80 /* Pack OSC object metadata for disk storage (LE byte order). */
81 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
82 struct lov_stripe_md *lsm)
87 lmm_size = sizeof(**lmmp);
92 OBD_FREE(*lmmp, lmm_size);
98 OBD_ALLOC(*lmmp, lmm_size);
104 LASSERT(lsm->lsm_object_id);
105 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
111 /* Unpack OSC object metadata from disk storage (LE byte order). */
112 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
113 struct lov_mds_md *lmm, int lmm_bytes)
119 if (lmm_bytes < sizeof (*lmm)) {
120 CERROR("lov_mds_md too small: %d, need %d\n",
121 lmm_bytes, (int)sizeof(*lmm));
124 /* XXX LOV_MAGIC etc check? */
126 if (lmm->lmm_object_id == 0) {
127 CERROR("lov_mds_md: zero lmm_object_id\n");
132 lsm_size = lov_stripe_md_size(1);
136 if (*lsmp != NULL && lmm == NULL) {
137 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
138 OBD_FREE(*lsmp, lsm_size);
144 OBD_ALLOC(*lsmp, lsm_size);
147 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
148 if ((*lsmp)->lsm_oinfo[0] == NULL) {
149 OBD_FREE(*lsmp, lsm_size);
152 loi_init((*lsmp)->lsm_oinfo[0]);
156 /* XXX zero *lsmp? */
157 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
158 LASSERT((*lsmp)->lsm_object_id);
161 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
166 static int osc_getattr_interpret(struct ptlrpc_request *req,
167 struct osc_async_args *aa, int rc)
169 struct ost_body *body;
175 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
176 lustre_swab_ost_body);
178 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
179 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
181 /* This should really be sent by the OST */
182 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
183 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
185 CERROR("can't unpack ost_body\n");
187 aa->aa_oi->oi_oa->o_valid = 0;
190 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
194 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
195 struct ptlrpc_request_set *set)
197 struct ptlrpc_request *req;
198 struct ost_body *body;
199 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
200 struct osc_async_args *aa;
203 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
204 OST_GETATTR, 2, size,NULL);
208 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
209 memcpy(&body->oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
211 ptlrpc_req_set_repsize(req, 2, size);
212 req->rq_interpret_reply = osc_getattr_interpret;
214 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
215 aa = ptlrpc_req_async_args(req);
218 ptlrpc_set_add_req(set, req);
222 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
224 struct ptlrpc_request *req;
225 struct ost_body *body;
226 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
230 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
231 OST_GETATTR, 2, size, NULL);
235 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
236 memcpy(&body->oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
238 ptlrpc_req_set_repsize(req, 2, size);
240 rc = ptlrpc_queue_wait(req);
242 CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
246 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
247 lustre_swab_ost_body);
249 CERROR ("can't unpack ost_body\n");
250 GOTO (out, rc = -EPROTO);
253 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
254 memcpy(oinfo->oi_oa, &body->oa, sizeof(*oinfo->oi_oa));
256 /* This should really be sent by the OST */
257 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
258 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
262 ptlrpc_req_finished(req);
266 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
267 struct obd_trans_info *oti)
269 struct ptlrpc_request *req;
270 struct ost_body *body;
271 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
275 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
276 OST_SETATTR, 2, size, NULL);
280 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
281 memcpy(&body->oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
283 ptlrpc_req_set_repsize(req, 2, size);
285 rc = ptlrpc_queue_wait(req);
289 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
290 lustre_swab_ost_body);
292 GOTO(out, rc = -EPROTO);
294 memcpy(oinfo->oi_oa, &body->oa, sizeof(*oinfo->oi_oa));
298 ptlrpc_req_finished(req);
302 static int osc_setattr_interpret(struct ptlrpc_request *req,
303 struct osc_async_args *aa, int rc)
305 struct ost_body *body;
311 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
312 lustre_swab_ost_body);
314 CERROR("can't unpack ost_body\n");
315 GOTO(out, rc = -EPROTO);
318 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
320 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
324 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
325 struct obd_trans_info *oti,
326 struct ptlrpc_request_set *rqset)
328 struct ptlrpc_request *req;
329 struct ost_body *body;
330 __u32 size[3] = { sizeof(struct ptlrpc_body), sizeof(*body), 0 };
332 struct osc_async_args *aa;
335 if (osc_exp_is_2_0_server(exp)) {
339 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
340 OST_SETATTR, bufcount, size, NULL);
344 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
346 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
348 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
351 memcpy(&body->oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
352 ptlrpc_req_set_repsize(req, 2, size);
353 /* do mds to ost setattr asynchronouly */
355 /* Do not wait for response. */
356 ptlrpcd_add_req(req);
358 req->rq_interpret_reply = osc_setattr_interpret;
360 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
361 aa = ptlrpc_req_async_args(req);
364 ptlrpc_set_add_req(rqset, req);
370 int osc_real_create(struct obd_export *exp, struct obdo *oa,
371 struct lov_stripe_md **ea, struct obd_trans_info *oti)
373 struct ptlrpc_request *req;
374 struct ost_body *body;
375 struct lov_stripe_md *lsm;
376 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
385 rc = obd_alloc_memmd(exp, &lsm);
390 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
391 OST_CREATE, 2, size, NULL);
393 GOTO(out, rc = -ENOMEM);
395 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
396 memcpy(&body->oa, oa, sizeof(body->oa));
398 ptlrpc_req_set_repsize(req, 2, size);
399 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
400 oa->o_flags == OBD_FL_DELORPHAN) {
402 "delorphan from OST integration");
403 /* Don't resend the delorphan req */
404 req->rq_no_resend = req->rq_no_delay = 1;
407 rc = ptlrpc_queue_wait(req);
411 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
412 lustre_swab_ost_body);
414 CERROR ("can't unpack ost_body\n");
415 GOTO (out_req, rc = -EPROTO);
418 memcpy(oa, &body->oa, sizeof(*oa));
420 /* This should really be sent by the OST */
421 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
422 oa->o_valid |= OBD_MD_FLBLKSZ;
424 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
425 * have valid lsm_oinfo data structs, so don't go touching that.
426 * This needs to be fixed in a big way.
428 lsm->lsm_object_id = oa->o_id;
432 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
434 if (oa->o_valid & OBD_MD_FLCOOKIE) {
435 if (!oti->oti_logcookies)
436 oti_alloc_cookies(oti, 1);
437 *oti->oti_logcookies = oa->o_lcookie;
441 CDEBUG(D_HA, "transno: "LPD64"\n",
442 lustre_msg_get_transno(req->rq_repmsg));
444 ptlrpc_req_finished(req);
447 obd_free_memmd(exp, &lsm);
451 static int osc_punch_interpret(struct ptlrpc_request *req,
452 struct osc_async_args *aa, int rc)
454 struct ost_body *body;
460 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof (*body),
461 lustre_swab_ost_body);
463 CERROR ("can't unpack ost_body\n");
464 GOTO(out, rc = -EPROTO);
467 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
469 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
473 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
474 struct obd_trans_info *oti,
475 struct ptlrpc_request_set *rqset)
477 struct ptlrpc_request *req;
478 struct osc_async_args *aa;
479 struct ost_body *body;
480 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
488 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
489 OST_PUNCH, 2, size, NULL);
493 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
494 ptlrpc_at_set_req_timeout(req);
496 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
497 memcpy(&body->oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
499 /* overload the size and blocks fields in the oa with start/end */
500 body->oa.o_size = oinfo->oi_policy.l_extent.start;
501 body->oa.o_blocks = oinfo->oi_policy.l_extent.end;
502 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
504 ptlrpc_req_set_repsize(req, 2, size);
506 req->rq_interpret_reply = osc_punch_interpret;
507 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
508 aa = ptlrpc_req_async_args(req);
510 ptlrpc_set_add_req(rqset, req);
515 static int osc_sync_interpret(struct ptlrpc_request *req,
516 struct osc_async_args *aa, int rc)
518 struct ost_body *body;
524 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
525 lustre_swab_ost_body);
527 CERROR ("can't unpack ost_body\n");
528 GOTO(out, rc = -EPROTO);
531 *aa->aa_oi->oi_oa = body->oa;
533 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
537 static int osc_sync(struct obd_export *exp, struct obd_info *oinfo,
538 obd_size start, obd_size end,
539 struct ptlrpc_request_set *set)
541 struct ptlrpc_request *req;
542 struct ost_body *body;
543 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
544 struct osc_async_args *aa;
552 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
553 OST_SYNC, 2, size, NULL);
557 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
558 memcpy(&body->oa, oinfo->oi_oa, sizeof(*oinfo->oi_oa));
560 /* overload the size and blocks fields in the oa with start/end */
561 body->oa.o_size = start;
562 body->oa.o_blocks = end;
563 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
565 ptlrpc_req_set_repsize(req, 2, size);
566 req->rq_interpret_reply = osc_sync_interpret;
568 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
569 aa = ptlrpc_req_async_args(req);
572 ptlrpc_set_add_req(set, req);
576 /* Find and cancel locally locks matched by @mode in the resource found by
577 * @objid. Found locks are added into @cancel list. Returns the amount of
578 * locks added to @cancels list. */
579 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
580 struct list_head *cancels, ldlm_mode_t mode,
583 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
584 struct ldlm_res_id res_id;
585 struct ldlm_resource *res;
589 osc_build_res_name(oa->o_id, oa->o_gr, &res_id);
590 res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
594 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
595 lock_flags, 0, NULL);
596 ldlm_resource_putref(res);
600 static int osc_destroy_interpret(struct ptlrpc_request *req, void *data,
603 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
605 atomic_dec(&cli->cl_destroy_in_flight);
606 cfs_waitq_signal(&cli->cl_destroy_waitq);
610 static int osc_can_send_destroy(struct client_obd *cli)
612 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
613 cli->cl_max_rpcs_in_flight) {
614 /* The destroy request can be sent */
617 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
618 cli->cl_max_rpcs_in_flight) {
620 * The counter has been modified between the two atomic
623 cfs_waitq_signal(&cli->cl_destroy_waitq);
628 /* Destroy requests can be async always on the client, and we don't even really
629 * care about the return code since the client cannot do anything at all about
631 * When the MDS is unlinking a filename, it saves the file objects into a
632 * recovery llog, and these object records are cancelled when the OST reports
633 * they were destroyed and sync'd to disk (i.e. transaction committed).
634 * If the client dies, or the OST is down when the object should be destroyed,
635 * the records are not cancelled, and when the OST reconnects to the MDS next,
636 * it will retrieve the llog unlink logs and then sends the log cancellation
637 * cookies to the MDS after committing destroy transactions. */
638 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
639 struct lov_stripe_md *ea, struct obd_trans_info *oti,
640 struct obd_export *md_export)
642 CFS_LIST_HEAD(cancels);
643 struct ptlrpc_request *req;
644 struct ost_body *body;
645 __u32 size[3] = { sizeof(struct ptlrpc_body), sizeof(*body),
646 sizeof(struct ldlm_request) };
647 int count, bufcount = 2;
648 struct client_obd *cli = &exp->exp_obd->u.cli;
656 LASSERT(oa->o_id != 0);
658 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
659 LDLM_FL_DISCARD_DATA);
660 if (exp_connect_cancelset(exp))
662 req = ldlm_prep_elc_req(exp, LUSTRE_OST_VERSION, OST_DESTROY, bufcount,
663 size, REQ_REC_OFF + 1, 0, &cancels, count);
667 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
668 ptlrpc_at_set_req_timeout(req);
670 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
672 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE) {
673 oa->o_lcookie = *oti->oti_logcookies;
676 memcpy(&body->oa, oa, sizeof(*oa));
677 ptlrpc_req_set_repsize(req, 2, size);
679 /* don't throttle destroy RPCs for the MDT */
680 if (!(cli->cl_import->imp_connect_flags_orig & OBD_CONNECT_MDS)) {
681 req->rq_interpret_reply = osc_destroy_interpret;
682 if (!osc_can_send_destroy(cli)) {
683 struct l_wait_info lwi = { 0 };
686 * Wait until the number of on-going destroy RPCs drops
687 * under max_rpc_in_flight
689 l_wait_event_exclusive(cli->cl_destroy_waitq,
690 osc_can_send_destroy(cli), &lwi);
694 /* Do not wait for response */
695 ptlrpcd_add_req(req);
699 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
702 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
704 LASSERT(!(oa->o_valid & bits));
707 client_obd_list_lock(&cli->cl_loi_list_lock);
708 oa->o_dirty = cli->cl_dirty;
709 if (cli->cl_dirty > cli->cl_dirty_max) {
710 CERROR("dirty %lu > dirty_max %lu\n",
711 cli->cl_dirty, cli->cl_dirty_max);
713 } else if (atomic_read(&obd_dirty_pages) > obd_max_dirty_pages) {
714 CERROR("dirty %d > system dirty_max %d\n",
715 atomic_read(&obd_dirty_pages), obd_max_dirty_pages);
717 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
718 CERROR("dirty %lu - dirty_max %lu too big???\n",
719 cli->cl_dirty, cli->cl_dirty_max);
722 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
723 (cli->cl_max_rpcs_in_flight + 1);
724 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
726 oa->o_grant = cli->cl_avail_grant;
727 oa->o_dropped = cli->cl_lost_grant;
728 cli->cl_lost_grant = 0;
729 client_obd_list_unlock(&cli->cl_loi_list_lock);
730 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
731 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
734 /* caller must hold loi_list_lock */
735 static void osc_consume_write_grant(struct client_obd *cli,struct brw_page *pga)
737 atomic_inc(&obd_dirty_pages);
738 cli->cl_dirty += CFS_PAGE_SIZE;
739 cli->cl_avail_grant -= CFS_PAGE_SIZE;
740 pga->flag |= OBD_BRW_FROM_GRANT;
741 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
742 CFS_PAGE_SIZE, pga, pga->pg);
743 LASSERTF(cli->cl_avail_grant >= 0, "invalid avail grant is %ld \n",
744 cli->cl_avail_grant);
747 /* the companion to osc_consume_write_grant, called when a brw has completed.
748 * must be called with the loi lock held. */
749 static void osc_release_write_grant(struct client_obd *cli,
750 struct brw_page *pga, int sent)
752 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
755 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
760 pga->flag &= ~OBD_BRW_FROM_GRANT;
761 atomic_dec(&obd_dirty_pages);
762 cli->cl_dirty -= CFS_PAGE_SIZE;
764 cli->cl_lost_grant += CFS_PAGE_SIZE;
765 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
766 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
767 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
768 /* For short writes we shouldn't count parts of pages that
769 * span a whole block on the OST side, or our accounting goes
770 * wrong. Should match the code in filter_grant_check. */
771 int offset = pga->off & ~CFS_PAGE_MASK;
772 int count = pga->count + (offset & (blocksize - 1));
773 int end = (offset + pga->count) & (blocksize - 1);
775 count += blocksize - end;
777 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
778 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
779 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
780 cli->cl_avail_grant, cli->cl_dirty);
786 static unsigned long rpcs_in_flight(struct client_obd *cli)
788 return cli->cl_r_in_flight + cli->cl_w_in_flight;
791 /* caller must hold loi_list_lock */
792 void osc_wake_cache_waiters(struct client_obd *cli)
794 struct list_head *l, *tmp;
795 struct osc_cache_waiter *ocw;
798 list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
799 /* if we can't dirty more, we must wait until some is written */
800 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
801 ((atomic_read(&obd_dirty_pages)+1)>(obd_max_dirty_pages))) {
802 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
803 "osc max %ld, sys max %d\n", cli->cl_dirty,
804 cli->cl_dirty_max, obd_max_dirty_pages);
808 /* if still dirty cache but no grant wait for pending RPCs that
809 * may yet return us some grant before doing sync writes */
810 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
811 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
812 cli->cl_w_in_flight);
816 ocw = list_entry(l, struct osc_cache_waiter, ocw_entry);
817 list_del_init(&ocw->ocw_entry);
818 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
819 /* no more RPCs in flight to return grant, do sync IO */
820 ocw->ocw_rc = -EDQUOT;
821 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
823 osc_consume_write_grant(cli,
824 &ocw->ocw_oap->oap_brw_page);
827 cfs_waitq_signal(&ocw->ocw_waitq);
833 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
835 client_obd_list_lock(&cli->cl_loi_list_lock);
836 cli->cl_avail_grant = ocd->ocd_grant;
837 client_obd_list_unlock(&cli->cl_loi_list_lock);
839 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld\n",
840 cli->cl_avail_grant, cli->cl_lost_grant);
841 LASSERT(cli->cl_avail_grant >= 0);
844 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
846 client_obd_list_lock(&cli->cl_loi_list_lock);
847 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
848 if (body->oa.o_valid & OBD_MD_FLGRANT)
849 cli->cl_avail_grant += body->oa.o_grant;
850 /* waiters are woken in brw_interpret */
851 client_obd_list_unlock(&cli->cl_loi_list_lock);
854 /* We assume that the reason this OSC got a short read is because it read
855 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
856 * via the LOV, and it _knows_ it's reading inside the file, it's just that
857 * this stripe never got written at or beyond this stripe offset yet. */
858 static void handle_short_read(int nob_read, obd_count page_count,
859 struct brw_page **pga)
864 /* skip bytes read OK */
865 while (nob_read > 0) {
866 LASSERT (page_count > 0);
868 if (pga[i]->count > nob_read) {
869 /* EOF inside this page */
870 ptr = cfs_kmap(pga[i]->pg) +
871 (pga[i]->off & ~CFS_PAGE_MASK);
872 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
873 cfs_kunmap(pga[i]->pg);
879 nob_read -= pga[i]->count;
884 /* zero remaining pages */
885 while (page_count-- > 0) {
886 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
887 memset(ptr, 0, pga[i]->count);
888 cfs_kunmap(pga[i]->pg);
893 static int check_write_rcs(struct ptlrpc_request *req,
894 int requested_nob, int niocount,
895 obd_count page_count, struct brw_page **pga)
899 /* return error if any niobuf was in error */
900 remote_rcs = lustre_swab_repbuf(req, REQ_REC_OFF + 1,
901 sizeof(*remote_rcs) * niocount, NULL);
902 if (remote_rcs == NULL) {
903 CERROR("Missing/short RC vector on BRW_WRITE reply\n");
906 if (lustre_rep_need_swab(req))
907 for (i = 0; i < niocount; i++)
908 __swab32s(&remote_rcs[i]);
910 for (i = 0; i < niocount; i++) {
911 if (remote_rcs[i] < 0)
912 return(remote_rcs[i]);
914 if (remote_rcs[i] != 0) {
915 CERROR("rc[%d] invalid (%d) req %p\n",
916 i, remote_rcs[i], req);
921 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
922 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
923 req->rq_bulk->bd_nob_transferred, requested_nob);
930 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
932 if (p1->flag != p2->flag) {
933 unsigned mask = ~OBD_BRW_FROM_GRANT;
935 /* warn if we try to combine flags that we don't know to be
937 if ((p1->flag & mask) != (p2->flag & mask))
938 CERROR("is it ok to have flags 0x%x and 0x%x in the "
939 "same brw?\n", p1->flag, p2->flag);
943 return (p1->off + p1->count == p2->off);
946 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
947 struct brw_page **pga, int opc,
948 cksum_type_t cksum_type)
953 LASSERT (pg_count > 0);
954 cksum = init_checksum(cksum_type);
955 while (nob > 0 && pg_count > 0) {
956 unsigned char *ptr = cfs_kmap(pga[i]->pg);
957 int off = pga[i]->off & ~CFS_PAGE_MASK;
958 int count = pga[i]->count > nob ? nob : pga[i]->count;
960 /* corrupt the data before we compute the checksum, to
961 * simulate an OST->client data error */
962 if (i == 0 && opc == OST_READ &&
963 OBD_FAIL_CHECK_ONCE(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
964 memcpy(ptr + off, "bad1", min(4, nob));
965 cksum = compute_checksum(cksum, ptr + off, count, cksum_type);
966 cfs_kunmap(pga[i]->pg);
967 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
970 nob -= pga[i]->count;
974 /* For sending we only compute the wrong checksum instead
975 * of corrupting the data so it is still correct on a redo */
976 if (opc == OST_WRITE && OBD_FAIL_CHECK_ONCE(OBD_FAIL_OSC_CHECKSUM_SEND))
982 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
983 struct lov_stripe_md *lsm, obd_count page_count,
984 struct brw_page **pga,
985 struct ptlrpc_request **reqp)
987 struct ptlrpc_request *req;
988 struct ptlrpc_bulk_desc *desc;
989 struct ost_body *body;
990 struct obd_ioobj *ioobj;
991 struct niobuf_remote *niobuf;
992 __u32 size[4] = { sizeof(struct ptlrpc_body), sizeof(*body) };
993 int niocount, i, requested_nob, opc, rc;
994 struct ptlrpc_request_pool *pool;
995 struct osc_brw_async_args *aa;
996 struct brw_page *pg_prev;
999 OBD_FAIL_RETURN(OBD_FAIL_OSC_BRW_PREP_REQ, -ENOMEM); /* Recoverable */
1000 OBD_FAIL_RETURN(OBD_FAIL_OSC_BRW_PREP_REQ2, -EINVAL); /* Fatal */
1002 opc = ((cmd & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
1003 pool = ((cmd & OBD_BRW_WRITE) != 0) ? cli->cl_import->imp_rq_pool :NULL;
1005 for (niocount = i = 1; i < page_count; i++) {
1006 if (!can_merge_pages(pga[i - 1], pga[i]))
1010 size[REQ_REC_OFF + 1] = sizeof(*ioobj);
1011 size[REQ_REC_OFF + 2] = niocount * sizeof(*niobuf);
1013 req = ptlrpc_prep_req_pool(cli->cl_import, LUSTRE_OST_VERSION, opc, 4, size,
1018 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1019 ptlrpc_at_set_req_timeout(req);
1021 if (opc == OST_WRITE)
1022 desc = ptlrpc_prep_bulk_imp (req, page_count,
1023 BULK_GET_SOURCE, OST_BULK_PORTAL);
1025 desc = ptlrpc_prep_bulk_imp (req, page_count,
1026 BULK_PUT_SINK, OST_BULK_PORTAL);
1028 GOTO(out, rc = -ENOMEM);
1029 /* NB request now owns desc and will free it when it gets freed */
1031 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1032 ioobj = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 1, sizeof(*ioobj));
1033 niobuf = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1034 niocount * sizeof(*niobuf));
1036 memcpy(&body->oa, oa, sizeof(*oa));
1038 obdo_to_ioobj(oa, ioobj);
1039 ioobj->ioo_bufcnt = niocount;
1041 LASSERT (page_count > 0);
1043 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1044 struct brw_page *pg = pga[i];
1046 LASSERT(pg->count > 0);
1047 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1048 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1049 pg->off, pg->count);
1051 LASSERTF(i == 0 || pg->off > pg_prev->off,
1052 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1053 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1055 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1056 pg_prev->pg, page_private(pg_prev->pg),
1057 pg_prev->pg->index, pg_prev->off);
1059 LASSERTF(i == 0 || pg->off > pg_prev->off,
1060 "i %d p_c %u\n", i, page_count);
1062 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1063 (pg->flag & OBD_BRW_SRVLOCK));
1065 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1067 requested_nob += pg->count;
1069 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1071 niobuf->len += pg->count;
1073 niobuf->offset = pg->off;
1074 niobuf->len = pg->count;
1075 niobuf->flags = pg->flag;
1080 LASSERTF((void *)(niobuf - niocount) ==
1081 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1082 niocount * sizeof(*niobuf)),
1083 "want %p - real %p\n", lustre_msg_buf(req->rq_reqmsg,
1084 REQ_REC_OFF + 2, niocount * sizeof(*niobuf)),
1085 (void *)(niobuf - niocount));
1087 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1089 /* size[REQ_REC_OFF] still sizeof (*body) */
1090 if (opc == OST_WRITE) {
1091 if (cli->cl_checksum) {
1092 /* store cl_cksum_type in a local variable since
1093 * it can be changed via lprocfs */
1094 cksum_type_t cksum_type = cli->cl_cksum_type;
1096 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1097 oa->o_flags = body->oa.o_flags = 0;
1098 body->oa.o_flags |= cksum_type_pack(cksum_type);
1099 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1100 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1104 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1106 /* save this in 'oa', too, for later checking */
1107 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1108 oa->o_flags |= cksum_type_pack(cksum_type);
1110 /* clear out the checksum flag, in case this is a
1111 * resend but cl_checksum is no longer set. b=11238 */
1112 oa->o_valid &= ~OBD_MD_FLCKSUM;
1114 oa->o_cksum = body->oa.o_cksum;
1115 /* 1 RC per niobuf */
1116 size[REPLY_REC_OFF + 1] = sizeof(__u32) * niocount;
1117 ptlrpc_req_set_repsize(req, 3, size);
1119 if (cli->cl_checksum) {
1120 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1121 body->oa.o_flags = 0;
1122 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1123 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1125 /* 1 RC for the whole I/O */
1126 ptlrpc_req_set_repsize(req, 2, size);
1129 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1130 aa = ptlrpc_req_async_args(req);
1132 aa->aa_requested_nob = requested_nob;
1133 aa->aa_nio_count = niocount;
1134 aa->aa_page_count = page_count;
1138 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1144 ptlrpc_req_finished (req);
1148 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1149 __u32 client_cksum, __u32 server_cksum, int nob,
1150 obd_count page_count, struct brw_page **pga,
1151 cksum_type_t client_cksum_type)
1155 cksum_type_t cksum_type;
1157 if (server_cksum == client_cksum) {
1158 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1162 if (oa->o_valid & OBD_MD_FLFLAGS)
1163 cksum_type = cksum_type_unpack(oa->o_flags);
1165 cksum_type = OBD_CKSUM_CRC32;
1167 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1170 if (cksum_type != client_cksum_type)
1171 msg = "the server did not use the checksum type specified in "
1172 "the original request - likely a protocol problem";
1173 else if (new_cksum == server_cksum)
1174 msg = "changed on the client after we checksummed it - "
1175 "likely false positive due to mmap IO (bug 11742)";
1176 else if (new_cksum == client_cksum)
1177 msg = "changed in transit before arrival at OST";
1179 msg = "changed in transit AND doesn't match the original - "
1180 "likely false positive due to mmap IO (bug 11742)";
1182 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1183 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1184 "["LPU64"-"LPU64"]\n",
1185 msg, libcfs_nid2str(peer->nid),
1186 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1187 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1190 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1192 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1193 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1194 "client csum now %x\n", client_cksum, client_cksum_type,
1195 server_cksum, cksum_type, new_cksum);
1200 /* Note rc enters this function as number of bytes transferred */
1201 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1203 struct osc_brw_async_args *aa = ptlrpc_req_async_args(req);
1204 const lnet_process_id_t *peer =
1205 &req->rq_import->imp_connection->c_peer;
1206 struct client_obd *cli = aa->aa_cli;
1207 struct ost_body *body;
1208 __u32 client_cksum = 0;
1211 if (rc < 0 && rc != -EDQUOT)
1214 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1215 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1216 lustre_swab_ost_body);
1218 CERROR ("Can't unpack body\n");
1222 /* set/clear over quota flag for a uid/gid */
1223 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1224 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA))
1225 lquota_setdq(quota_interface, cli, body->oa.o_uid,
1226 body->oa.o_gid, body->oa.o_valid,
1232 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1233 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1235 osc_update_grant(cli, body);
1237 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1239 CERROR ("Unexpected +ve rc %d\n", rc);
1242 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1244 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1245 check_write_checksum(&body->oa, peer, client_cksum,
1246 body->oa.o_cksum, aa->aa_requested_nob,
1247 aa->aa_page_count, aa->aa_ppga,
1248 cksum_type_unpack(aa->aa_oa->o_flags)))
1251 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1252 aa->aa_page_count, aa->aa_ppga);
1256 /* The rest of this function executes only for OST_READs */
1257 if (rc > aa->aa_requested_nob) {
1258 CERROR("Unexpected rc %d (%d requested)\n", rc,
1259 aa->aa_requested_nob);
1263 if (rc != req->rq_bulk->bd_nob_transferred) {
1264 CERROR ("Unexpected rc %d (%d transferred)\n",
1265 rc, req->rq_bulk->bd_nob_transferred);
1269 if (rc < aa->aa_requested_nob)
1270 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1272 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1273 static int cksum_counter;
1274 __u32 server_cksum = body->oa.o_cksum;
1277 cksum_type_t cksum_type;
1279 if (body->oa.o_valid & OBD_MD_FLFLAGS)
1280 cksum_type = cksum_type_unpack(body->oa.o_flags);
1282 cksum_type = OBD_CKSUM_CRC32;
1283 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1284 aa->aa_ppga, OST_READ,
1287 if (peer->nid == req->rq_bulk->bd_sender) {
1291 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1294 if (server_cksum == ~0 && rc > 0) {
1295 CERROR("Protocol error: server %s set the 'checksum' "
1296 "bit, but didn't send a checksum. Not fatal, "
1297 "but please notify on http://bugzilla.lustre.org/\n",
1298 libcfs_nid2str(peer->nid));
1299 } else if (server_cksum != client_cksum) {
1300 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1301 "%s%s%s inum "LPU64"/"LPU64" object "
1302 LPU64"/"LPU64" extent "
1303 "["LPU64"-"LPU64"]\n",
1304 req->rq_import->imp_obd->obd_name,
1305 libcfs_nid2str(peer->nid),
1307 body->oa.o_valid & OBD_MD_FLFID ?
1308 body->oa.o_fid : (__u64)0,
1309 body->oa.o_valid & OBD_MD_FLFID ?
1310 body->oa.o_generation :(__u64)0,
1312 body->oa.o_valid & OBD_MD_FLGROUP ?
1313 body->oa.o_gr : (__u64)0,
1314 aa->aa_ppga[0]->off,
1315 aa->aa_ppga[aa->aa_page_count-1]->off +
1316 aa->aa_ppga[aa->aa_page_count-1]->count -
1318 CERROR("client %x, server %x, cksum_type %x\n",
1319 client_cksum, server_cksum, cksum_type);
1321 aa->aa_oa->o_cksum = client_cksum;
1325 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1328 } else if (unlikely(client_cksum)) {
1329 static int cksum_missed;
1332 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1333 CERROR("Checksum %u requested from %s but not sent\n",
1334 cksum_missed, libcfs_nid2str(peer->nid));
1340 memcpy(aa->aa_oa, &body->oa, sizeof(*aa->aa_oa));
1345 static int osc_brw_internal(int cmd, struct obd_export *exp,struct obdo *oa,
1346 struct lov_stripe_md *lsm,
1347 obd_count page_count, struct brw_page **pga)
1349 struct ptlrpc_request *request;
1353 struct l_wait_info lwi;
1356 init_waitqueue_head(&waitq);
1359 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1360 page_count, pga, &request);
1364 rc = ptlrpc_queue_wait(request);
1366 if (rc == -ETIMEDOUT && request->rq_resend) {
1367 DEBUG_REQ(D_HA, request, "BULK TIMEOUT");
1368 ptlrpc_req_finished(request);
1372 rc = osc_brw_fini_request(request, rc);
1374 ptlrpc_req_finished(request);
1375 if (osc_recoverable_error(rc)) {
1377 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1378 CERROR("too many resend retries, returning error\n");
1382 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1383 l_wait_event(waitq, 0, &lwi);
1390 int osc_brw_redo_request(struct ptlrpc_request *request,
1391 struct osc_brw_async_args *aa)
1393 struct ptlrpc_request *new_req;
1394 struct ptlrpc_request_set *set = request->rq_set;
1395 struct osc_brw_async_args *new_aa;
1396 struct osc_async_page *oap;
1400 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1401 CERROR("too many resend retries, returning error\n");
1405 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1407 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1408 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1409 aa->aa_cli, aa->aa_oa,
1410 NULL /* lsm unused by osc currently */,
1411 aa->aa_page_count, aa->aa_ppga, &new_req);
1415 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1417 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1418 if (oap->oap_request != NULL) {
1419 LASSERTF(request == oap->oap_request,
1420 "request %p != oap_request %p\n",
1421 request, oap->oap_request);
1422 if (oap->oap_interrupted) {
1423 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1424 ptlrpc_req_finished(new_req);
1429 /* New request takes over pga and oaps from old request.
1430 * Note that copying a list_head doesn't work, need to move it... */
1432 new_req->rq_interpret_reply = request->rq_interpret_reply;
1433 new_req->rq_async_args = request->rq_async_args;
1434 new_req->rq_sent = CURRENT_SECONDS + aa->aa_resends;
1436 new_aa = ptlrpc_req_async_args(new_req);
1438 CFS_INIT_LIST_HEAD(&new_aa->aa_oaps);
1439 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1440 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
1442 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1443 if (oap->oap_request) {
1444 ptlrpc_req_finished(oap->oap_request);
1445 oap->oap_request = ptlrpc_request_addref(new_req);
1449 /* use ptlrpc_set_add_req is safe because interpret functions work
1450 * in check_set context. only one way exist with access to request
1451 * from different thread got -EINTR - this way protected with
1452 * cl_loi_list_lock */
1453 ptlrpc_set_add_req(set, new_req);
1455 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1457 DEBUG_REQ(D_INFO, new_req, "new request");
1461 static int async_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1462 struct lov_stripe_md *lsm, obd_count page_count,
1463 struct brw_page **pga, struct ptlrpc_request_set *set)
1465 struct ptlrpc_request *request;
1466 struct client_obd *cli = &exp->exp_obd->u.cli;
1468 struct osc_brw_async_args *aa;
1471 /* Consume write credits even if doing a sync write -
1472 * otherwise we may run out of space on OST due to grant. */
1473 if (cmd == OBD_BRW_WRITE) {
1474 client_obd_list_lock(&cli->cl_loi_list_lock);
1475 for (i = 0; i < page_count; i++) {
1476 if (cli->cl_avail_grant >= CFS_PAGE_SIZE)
1477 osc_consume_write_grant(cli, pga[i]);
1479 client_obd_list_unlock(&cli->cl_loi_list_lock);
1482 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1483 page_count, pga, &request);
1485 CLASSERT(sizeof(*aa) <= sizeof(request->rq_async_args));
1486 aa = ptlrpc_req_async_args(request);
1487 if (cmd == OBD_BRW_READ) {
1488 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
1489 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
1491 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
1492 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
1493 cli->cl_w_in_flight);
1495 ptlrpc_lprocfs_brw(request, aa->aa_requested_nob);
1497 LASSERT(list_empty(&aa->aa_oaps));
1500 request->rq_interpret_reply = brw_interpret;
1501 ptlrpc_set_add_req(set, request);
1502 client_obd_list_lock(&cli->cl_loi_list_lock);
1503 if (cmd == OBD_BRW_READ)
1504 cli->cl_r_in_flight++;
1506 cli->cl_w_in_flight++;
1507 client_obd_list_unlock(&cli->cl_loi_list_lock);
1508 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_DIO_PAUSE, 3);
1509 } else if (cmd == OBD_BRW_WRITE) {
1510 client_obd_list_lock(&cli->cl_loi_list_lock);
1511 for (i = 0; i < page_count; i++)
1512 osc_release_write_grant(cli, pga[i], 0);
1513 osc_wake_cache_waiters(cli);
1514 client_obd_list_unlock(&cli->cl_loi_list_lock);
1521 * ugh, we want disk allocation on the target to happen in offset order. we'll
1522 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1523 * fine for our small page arrays and doesn't require allocation. its an
1524 * insertion sort that swaps elements that are strides apart, shrinking the
1525 * stride down until its '1' and the array is sorted.
1527 static void sort_brw_pages(struct brw_page **array, int num)
1530 struct brw_page *tmp;
1534 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1539 for (i = stride ; i < num ; i++) {
1542 while (j >= stride && array[j-stride]->off > tmp->off) {
1543 array[j] = array[j - stride];
1548 } while (stride > 1);
1551 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1557 LASSERT (pages > 0);
1558 offset = pg[i]->off & (~CFS_PAGE_MASK);
1562 if (pages == 0) /* that's all */
1565 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1566 return count; /* doesn't end on page boundary */
1569 offset = pg[i]->off & (~CFS_PAGE_MASK);
1570 if (offset != 0) /* doesn't start on page boundary */
1577 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1579 struct brw_page **ppga;
1582 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1586 for (i = 0; i < count; i++)
1591 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1593 LASSERT(ppga != NULL);
1594 OBD_FREE(ppga, sizeof(*ppga) * count);
1597 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1598 obd_count page_count, struct brw_page *pga,
1599 struct obd_trans_info *oti)
1601 struct obdo *saved_oa = NULL;
1602 struct brw_page **ppga, **orig;
1603 struct obd_import *imp = class_exp2cliimp(exp);
1604 struct client_obd *cli = &imp->imp_obd->u.cli;
1605 int rc, page_count_orig;
1608 if (cmd & OBD_BRW_CHECK) {
1609 /* The caller just wants to know if there's a chance that this
1610 * I/O can succeed */
1612 if (imp == NULL || imp->imp_invalid)
1617 /* test_brw with a failed create can trip this, maybe others. */
1618 LASSERT(cli->cl_max_pages_per_rpc);
1622 orig = ppga = osc_build_ppga(pga, page_count);
1625 page_count_orig = page_count;
1627 sort_brw_pages(ppga, page_count);
1628 while (page_count) {
1629 obd_count pages_per_brw;
1631 if (page_count > cli->cl_max_pages_per_rpc)
1632 pages_per_brw = cli->cl_max_pages_per_rpc;
1634 pages_per_brw = page_count;
1636 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1638 if (saved_oa != NULL) {
1639 /* restore previously saved oa */
1640 *oinfo->oi_oa = *saved_oa;
1641 } else if (page_count > pages_per_brw) {
1642 /* save a copy of oa (brw will clobber it) */
1643 OBDO_ALLOC(saved_oa);
1644 if (saved_oa == NULL)
1645 GOTO(out, rc = -ENOMEM);
1646 *saved_oa = *oinfo->oi_oa;
1649 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1650 pages_per_brw, ppga);
1655 page_count -= pages_per_brw;
1656 ppga += pages_per_brw;
1660 osc_release_ppga(orig, page_count_orig);
1662 if (saved_oa != NULL)
1663 OBDO_FREE(saved_oa);
1668 static int osc_brw_async(int cmd, struct obd_export *exp,
1669 struct obd_info *oinfo, obd_count page_count,
1670 struct brw_page *pga, struct obd_trans_info *oti,
1671 struct ptlrpc_request_set *set)
1673 struct brw_page **ppga, **orig;
1674 int page_count_orig;
1678 if (cmd & OBD_BRW_CHECK) {
1679 /* The caller just wants to know if there's a chance that this
1680 * I/O can succeed */
1681 struct obd_import *imp = class_exp2cliimp(exp);
1683 if (imp == NULL || imp->imp_invalid)
1688 orig = ppga = osc_build_ppga(pga, page_count);
1691 page_count_orig = page_count;
1693 sort_brw_pages(ppga, page_count);
1694 while (page_count) {
1695 struct brw_page **copy;
1696 obd_count pages_per_brw;
1698 pages_per_brw = min_t(obd_count, page_count,
1699 class_exp2cliimp(exp)->imp_obd->u.cli.cl_max_pages_per_rpc);
1701 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1703 /* use ppga only if single RPC is going to fly */
1704 if (pages_per_brw != page_count_orig || ppga != orig) {
1705 OBD_ALLOC(copy, pages_per_brw * sizeof(*copy));
1707 GOTO(out, rc = -ENOMEM);
1708 memcpy(copy, ppga, pages_per_brw * sizeof(*copy));
1712 rc = async_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1713 pages_per_brw, copy, set);
1717 OBD_FREE(copy, pages_per_brw * sizeof(*copy));
1722 /* we passed it to async_internal() which is
1723 * now responsible for releasing memory */
1727 page_count -= pages_per_brw;
1728 ppga += pages_per_brw;
1732 osc_release_ppga(orig, page_count_orig);
1736 static void osc_check_rpcs(struct client_obd *cli);
1738 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1739 * the dirty accounting. Writeback completes or truncate happens before
1740 * writing starts. Must be called with the loi lock held. */
1741 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1744 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1747 /* This maintains the lists of pending pages to read/write for a given object
1748 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1749 * to quickly find objects that are ready to send an RPC. */
1750 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1756 if (lop->lop_num_pending == 0)
1759 /* if we have an invalid import we want to drain the queued pages
1760 * by forcing them through rpcs that immediately fail and complete
1761 * the pages. recovery relies on this to empty the queued pages
1762 * before canceling the locks and evicting down the llite pages */
1763 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1766 /* stream rpcs in queue order as long as as there is an urgent page
1767 * queued. this is our cheap solution for good batching in the case
1768 * where writepage marks some random page in the middle of the file
1769 * as urgent because of, say, memory pressure */
1770 if (!list_empty(&lop->lop_urgent)) {
1771 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1775 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1776 optimal = cli->cl_max_pages_per_rpc;
1777 if (cmd & OBD_BRW_WRITE) {
1778 /* trigger a write rpc stream as long as there are dirtiers
1779 * waiting for space. as they're waiting, they're not going to
1780 * create more pages to coallesce with what's waiting.. */
1781 if (!list_empty(&cli->cl_cache_waiters)) {
1782 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1786 /* +16 to avoid triggering rpcs that would want to include pages
1787 * that are being queued but which can't be made ready until
1788 * the queuer finishes with the page. this is a wart for
1789 * llite::commit_write() */
1792 if (lop->lop_num_pending >= optimal)
1798 static int lop_makes_hprpc(struct loi_oap_pages *lop)
1800 struct osc_async_page *oap;
1803 if (list_empty(&lop->lop_urgent))
1806 oap = list_entry(lop->lop_urgent.next,
1807 struct osc_async_page, oap_urgent_item);
1809 if (oap->oap_async_flags & ASYNC_HP) {
1810 CDEBUG(D_CACHE, "hp request forcing RPC\n");
1817 static void on_list(struct list_head *item, struct list_head *list,
1820 if (list_empty(item) && should_be_on)
1821 list_add_tail(item, list);
1822 else if (!list_empty(item) && !should_be_on)
1823 list_del_init(item);
1826 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1827 * can find pages to build into rpcs quickly */
1828 static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1830 if (lop_makes_hprpc(&loi->loi_write_lop) ||
1831 lop_makes_hprpc(&loi->loi_read_lop)) {
1833 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list, 0);
1834 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 1);
1836 on_list(&loi->loi_hp_ready_item, &cli->cl_loi_hp_ready_list, 0);
1837 on_list(&loi->loi_ready_item, &cli->cl_loi_ready_list,
1838 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)||
1839 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1842 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1843 loi->loi_write_lop.lop_num_pending);
1845 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1846 loi->loi_read_lop.lop_num_pending);
1849 static void lop_update_pending(struct client_obd *cli,
1850 struct loi_oap_pages *lop, int cmd, int delta)
1852 lop->lop_num_pending += delta;
1853 if (cmd & OBD_BRW_WRITE)
1854 cli->cl_pending_w_pages += delta;
1856 cli->cl_pending_r_pages += delta;
1859 /* this is called when a sync waiter receives an interruption. Its job is to
1860 * get the caller woken as soon as possible. If its page hasn't been put in an
1861 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
1862 * desiring interruption which will forcefully complete the rpc once the rpc
1864 static void osc_occ_interrupted(struct oig_callback_context *occ)
1866 struct osc_async_page *oap;
1867 struct loi_oap_pages *lop;
1868 struct lov_oinfo *loi;
1871 /* XXX member_of() */
1872 oap = list_entry(occ, struct osc_async_page, oap_occ);
1874 client_obd_list_lock(&oap->oap_cli->cl_loi_list_lock);
1876 oap->oap_interrupted = 1;
1878 /* ok, it's been put in an rpc. only one oap gets a request reference */
1879 if (oap->oap_request != NULL) {
1880 ptlrpc_mark_interrupted(oap->oap_request);
1881 ptlrpcd_wake(oap->oap_request);
1885 /* we don't get interruption callbacks until osc_trigger_group_io()
1886 * has been called and put the sync oaps in the pending/urgent lists.*/
1887 if (!list_empty(&oap->oap_pending_item)) {
1888 list_del_init(&oap->oap_pending_item);
1889 list_del_init(&oap->oap_urgent_item);
1892 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
1893 &loi->loi_write_lop : &loi->loi_read_lop;
1894 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
1895 loi_list_maint(oap->oap_cli, oap->oap_loi);
1897 oig_complete_one(oap->oap_oig, &oap->oap_occ, -EINTR);
1898 oap->oap_oig = NULL;
1902 client_obd_list_unlock(&oap->oap_cli->cl_loi_list_lock);
1905 /* this is trying to propogate async writeback errors back up to the
1906 * application. As an async write fails we record the error code for later if
1907 * the app does an fsync. As long as errors persist we force future rpcs to be
1908 * sync so that the app can get a sync error and break the cycle of queueing
1909 * pages for which writeback will fail. */
1910 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
1917 ar->ar_force_sync = 1;
1918 ar->ar_min_xid = ptlrpc_sample_next_xid();
1923 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
1924 ar->ar_force_sync = 0;
1927 static void osc_oap_to_pending(struct osc_async_page *oap)
1929 struct loi_oap_pages *lop;
1931 if (oap->oap_cmd & OBD_BRW_WRITE)
1932 lop = &oap->oap_loi->loi_write_lop;
1934 lop = &oap->oap_loi->loi_read_lop;
1936 if (oap->oap_async_flags & ASYNC_HP)
1937 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
1938 else if (oap->oap_async_flags & ASYNC_URGENT)
1939 list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
1940 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
1941 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
1944 /* this must be called holding the loi list lock to give coverage to exit_cache,
1945 * async_flag maintenance, and oap_request */
1946 static void osc_ap_completion(struct client_obd *cli, struct obdo *oa,
1947 struct osc_async_page *oap, int sent, int rc)
1952 if (oap->oap_request != NULL) {
1953 xid = ptlrpc_req_xid(oap->oap_request);
1954 ptlrpc_req_finished(oap->oap_request);
1955 oap->oap_request = NULL;
1958 oap->oap_async_flags = 0;
1959 oap->oap_interrupted = 0;
1961 if (oap->oap_cmd & OBD_BRW_WRITE) {
1962 osc_process_ar(&cli->cl_ar, xid, rc);
1963 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
1966 if (rc == 0 && oa != NULL) {
1967 if (oa->o_valid & OBD_MD_FLBLOCKS)
1968 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
1969 if (oa->o_valid & OBD_MD_FLMTIME)
1970 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
1971 if (oa->o_valid & OBD_MD_FLATIME)
1972 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
1973 if (oa->o_valid & OBD_MD_FLCTIME)
1974 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
1978 osc_exit_cache(cli, oap, sent);
1979 oig_complete_one(oap->oap_oig, &oap->oap_occ, rc);
1980 oap->oap_oig = NULL;
1985 rc = oap->oap_caller_ops->ap_completion(oap->oap_caller_data,
1986 oap->oap_cmd, oa, rc);
1988 /* ll_ap_completion (from llite) drops PG_locked. so, a new
1989 * I/O on the page could start, but OSC calls it under lock
1990 * and thus we can add oap back to pending safely */
1992 /* upper layer wants to leave the page on pending queue */
1993 osc_oap_to_pending(oap);
1995 osc_exit_cache(cli, oap, sent);
1999 static int brw_interpret(struct ptlrpc_request *request, void *data, int rc)
2001 struct osc_brw_async_args *aa = data;
2002 struct client_obd *cli;
2005 rc = osc_brw_fini_request(request, rc);
2006 CDEBUG(D_INODE, "request %p aa %p rc %d\n", request, aa, rc);
2008 if (osc_recoverable_error(rc)) {
2009 rc = osc_brw_redo_request(request, aa);
2015 client_obd_list_lock(&cli->cl_loi_list_lock);
2016 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
2017 * is called so we know whether to go to sync BRWs or wait for more
2018 * RPCs to complete */
2019 if (lustre_msg_get_opc(request->rq_reqmsg) == OST_WRITE)
2020 cli->cl_w_in_flight--;
2022 cli->cl_r_in_flight--;
2024 if (!list_empty(&aa->aa_oaps)) { /* from osc_send_oap_rpc() */
2025 struct osc_async_page *oap, *tmp;
2026 /* the caller may re-use the oap after the completion call so
2027 * we need to clean it up a little */
2028 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
2029 list_del_init(&oap->oap_rpc_item);
2030 osc_ap_completion(cli, aa->aa_oa, oap, 1, rc);
2032 OBDO_FREE(aa->aa_oa);
2033 } else { /* from async_internal() */
2035 for (i = 0; i < aa->aa_page_count; i++)
2036 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
2038 osc_wake_cache_waiters(cli);
2039 osc_check_rpcs(cli);
2040 client_obd_list_unlock(&cli->cl_loi_list_lock);
2042 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
2046 static struct ptlrpc_request *osc_build_req(struct client_obd *cli,
2047 struct list_head *rpc_list,
2048 int page_count, int cmd)
2050 struct ptlrpc_request *req;
2051 struct brw_page **pga = NULL;
2052 struct osc_brw_async_args *aa;
2053 struct obdo *oa = NULL;
2054 struct obd_async_page_ops *ops = NULL;
2055 void *caller_data = NULL;
2056 struct osc_async_page *oap;
2057 struct ldlm_lock *lock = NULL;
2062 LASSERT(!list_empty(rpc_list));
2064 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2066 RETURN(ERR_PTR(-ENOMEM));
2070 GOTO(out, req = ERR_PTR(-ENOMEM));
2073 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2075 ops = oap->oap_caller_ops;
2076 caller_data = oap->oap_caller_data;
2077 lock = oap->oap_ldlm_lock;
2079 pga[i] = &oap->oap_brw_page;
2080 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2081 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2082 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2086 /* always get the data for the obdo for the rpc */
2087 LASSERT(ops != NULL);
2088 ops->ap_fill_obdo(caller_data, cmd, oa);
2090 oa->o_handle = lock->l_remote_handle;
2091 oa->o_valid |= OBD_MD_FLHANDLE;
2094 sort_brw_pages(pga, page_count);
2095 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count, pga, &req);
2097 CERROR("prep_req failed: %d\n", rc);
2098 GOTO(out, req = ERR_PTR(rc));
2100 oa = &((struct ost_body *)lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF,
2101 sizeof(struct ost_body)))->oa;
2103 /* Need to update the timestamps after the request is built in case
2104 * we race with setattr (locally or in queue at OST). If OST gets
2105 * later setattr before earlier BRW (as determined by the request xid),
2106 * the OST will not use BRW timestamps. Sadly, there is no obvious
2107 * way to do this in a single call. bug 10150 */
2108 if (pga[0]->flag & OBD_BRW_SRVLOCK) {
2109 /* in case of lockless read/write do not use inode's
2110 * timestamps because concurrent stat might fill the
2111 * inode with out-of-date times, send current
2113 if (cmd & OBD_BRW_WRITE) {
2114 oa->o_mtime = oa->o_ctime = LTIME_S(CURRENT_TIME);
2115 oa->o_valid |= OBD_MD_FLMTIME | OBD_MD_FLCTIME;
2116 valid = OBD_MD_FLATIME;
2118 oa->o_atime = LTIME_S(CURRENT_TIME);
2119 oa->o_valid |= OBD_MD_FLATIME;
2120 valid = OBD_MD_FLMTIME | OBD_MD_FLCTIME;
2123 valid = OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME;
2125 ops->ap_update_obdo(caller_data, cmd, oa, valid);
2127 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2128 aa = ptlrpc_req_async_args(req);
2129 CFS_INIT_LIST_HEAD(&aa->aa_oaps);
2130 list_splice(rpc_list, &aa->aa_oaps);
2131 CFS_INIT_LIST_HEAD(rpc_list);
2138 OBD_FREE(pga, sizeof(*pga) * page_count);
2143 /* the loi lock is held across this function but it's allowed to release
2144 * and reacquire it during its work */
2146 * prepare pages for ASYNC io and put pages in send queue.
2150 * \param cmd - OBD_BRW_* macroses
2151 * \param lop - pending pages
2153 * \return zero if pages successfully add to send queue.
2154 * \return not zere if error occurring.
2156 static int osc_send_oap_rpc(struct client_obd *cli, struct lov_oinfo *loi,
2157 int cmd, struct loi_oap_pages *lop)
2159 struct ptlrpc_request *req;
2160 obd_count page_count = 0;
2161 struct osc_async_page *oap = NULL, *tmp;
2162 struct osc_brw_async_args *aa;
2163 struct obd_async_page_ops *ops;
2164 CFS_LIST_HEAD(rpc_list);
2165 unsigned int ending_offset;
2166 unsigned starting_offset = 0;
2170 /* If there are HP OAPs we need to handle at least 1 of them,
2171 * move it the beginning of the pending list for that. */
2172 if (!list_empty(&lop->lop_urgent)) {
2173 oap = list_entry(lop->lop_urgent.next,
2174 struct osc_async_page, oap_urgent_item);
2175 if (oap->oap_async_flags & ASYNC_HP)
2176 list_move(&oap->oap_pending_item, &lop->lop_pending);
2179 /* first we find the pages we're allowed to work with */
2180 list_for_each_entry_safe(oap, tmp, &lop->lop_pending, oap_pending_item){
2181 ops = oap->oap_caller_ops;
2183 LASSERT(oap->oap_magic == OAP_MAGIC);
2185 if (page_count != 0 &&
2186 srvlock != !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK)) {
2187 CDEBUG(D_PAGE, "SRVLOCK flag mismatch,"
2188 " oap %p, page %p, srvlock %u\n",
2189 oap, oap->oap_brw_page.pg, (unsigned)!srvlock);
2192 /* in llite being 'ready' equates to the page being locked
2193 * until completion unlocks it. commit_write submits a page
2194 * as not ready because its unlock will happen unconditionally
2195 * as the call returns. if we race with commit_write giving
2196 * us that page we dont' want to create a hole in the page
2197 * stream, so we stop and leave the rpc to be fired by
2198 * another dirtier or kupdated interval (the not ready page
2199 * will still be on the dirty list). we could call in
2200 * at the end of ll_file_write to process the queue again. */
2201 if (!(oap->oap_async_flags & ASYNC_READY)) {
2202 int rc = ops->ap_make_ready(oap->oap_caller_data, cmd);
2204 CDEBUG(D_INODE, "oap %p page %p returned %d "
2205 "instead of ready\n", oap,
2209 /* llite is telling us that the page is still
2210 * in commit_write and that we should try
2211 * and put it in an rpc again later. we
2212 * break out of the loop so we don't create
2213 * a hole in the sequence of pages in the rpc
2218 /* the io isn't needed.. tell the checks
2219 * below to complete the rpc with EINTR */
2220 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2221 oap->oap_count = -EINTR;
2224 oap->oap_async_flags |= ASYNC_READY;
2227 LASSERTF(0, "oap %p page %p returned %d "
2228 "from make_ready\n", oap,
2236 * Page submitted for IO has to be locked. Either by
2237 * ->ap_make_ready() or by higher layers.
2239 #if defined(__KERNEL__) && defined(__linux__)
2240 if(!(PageLocked(oap->oap_page) &&
2241 (CheckWriteback(oap->oap_page, cmd) || oap->oap_oig !=NULL))) {
2242 CDEBUG(D_PAGE, "page %p lost wb %lx/%x\n",
2243 oap->oap_page, (long)oap->oap_page->flags, oap->oap_async_flags);
2247 /* If there is a gap at the start of this page, it can't merge
2248 * with any previous page, so we'll hand the network a
2249 * "fragmented" page array that it can't transfer in 1 RDMA */
2250 if (page_count != 0 && oap->oap_page_off != 0)
2253 /* take the page out of our book-keeping */
2254 list_del_init(&oap->oap_pending_item);
2255 lop_update_pending(cli, lop, cmd, -1);
2256 list_del_init(&oap->oap_urgent_item);
2258 if (page_count == 0)
2259 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2260 (PTLRPC_MAX_BRW_SIZE - 1);
2262 /* ask the caller for the size of the io as the rpc leaves. */
2263 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE))
2265 ops->ap_refresh_count(oap->oap_caller_data,cmd);
2266 if (oap->oap_count <= 0) {
2267 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2269 osc_ap_completion(cli, NULL, oap, 0, oap->oap_count);
2273 /* now put the page back in our accounting */
2274 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2275 if (page_count == 0)
2276 srvlock = !!(oap->oap_brw_flags & OBD_BRW_SRVLOCK);
2277 if (++page_count >= cli->cl_max_pages_per_rpc)
2280 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2281 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2282 * have the same alignment as the initial writes that allocated
2283 * extents on the server. */
2284 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2285 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2286 if (ending_offset == 0)
2289 /* If there is a gap at the end of this page, it can't merge
2290 * with any subsequent pages, so we'll hand the network a
2291 * "fragmented" page array that it can't transfer in 1 RDMA */
2292 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2296 osc_wake_cache_waiters(cli);
2298 if (page_count == 0)
2301 loi_list_maint(cli, loi);
2303 client_obd_list_unlock(&cli->cl_loi_list_lock);
2305 req = osc_build_req(cli, &rpc_list, page_count, cmd);
2307 /* this should happen rarely and is pretty bad, it makes the
2308 * pending list not follow the dirty order */
2309 client_obd_list_lock(&cli->cl_loi_list_lock);
2310 list_for_each_entry_safe(oap, tmp, &rpc_list, oap_rpc_item) {
2311 list_del_init(&oap->oap_rpc_item);
2313 /* queued sync pages can be torn down while the pages
2314 * were between the pending list and the rpc */
2315 if (oap->oap_interrupted) {
2316 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2317 osc_ap_completion(cli, NULL, oap, 0,
2321 osc_ap_completion(cli, NULL, oap, 0, PTR_ERR(req));
2323 loi_list_maint(cli, loi);
2324 RETURN(PTR_ERR(req));
2327 aa = ptlrpc_req_async_args(req);
2328 if (cmd == OBD_BRW_READ) {
2329 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2330 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2331 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2332 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2334 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2335 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2336 cli->cl_w_in_flight);
2337 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2338 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2340 ptlrpc_lprocfs_brw(req, aa->aa_requested_nob);
2342 client_obd_list_lock(&cli->cl_loi_list_lock);
2344 if (cmd == OBD_BRW_READ)
2345 cli->cl_r_in_flight++;
2347 cli->cl_w_in_flight++;
2349 /* queued sync pages can be torn down while the pages
2350 * were between the pending list and the rpc */
2352 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2353 /* only one oap gets a request reference */
2356 if (oap->oap_interrupted && !req->rq_intr) {
2357 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2359 ptlrpc_mark_interrupted(req);
2363 tmp->oap_request = ptlrpc_request_addref(req);
2365 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2366 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2368 req->rq_interpret_reply = brw_interpret;
2369 ptlrpcd_add_req(req);
2373 #define LOI_DEBUG(LOI, STR, args...) \
2374 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2375 !list_empty(&(LOI)->loi_ready_item) || \
2376 !list_empty(&(LOI)->loi_hp_ready_item), \
2377 (LOI)->loi_write_lop.lop_num_pending, \
2378 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2379 (LOI)->loi_read_lop.lop_num_pending, \
2380 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2383 /* This is called by osc_check_rpcs() to find which objects have pages that
2384 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2385 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2388 /* First return objects that have blocked locks so that they
2389 * will be flushed quickly and other clients can get the lock,
2390 * then objects which have pages ready to be stuffed into RPCs */
2391 if (!list_empty(&cli->cl_loi_hp_ready_list))
2392 RETURN(list_entry(cli->cl_loi_hp_ready_list.next,
2393 struct lov_oinfo, loi_hp_ready_item));
2394 if (!list_empty(&cli->cl_loi_ready_list))
2395 RETURN(list_entry(cli->cl_loi_ready_list.next,
2396 struct lov_oinfo, loi_ready_item));
2398 /* then if we have cache waiters, return all objects with queued
2399 * writes. This is especially important when many small files
2400 * have filled up the cache and not been fired into rpcs because
2401 * they don't pass the nr_pending/object threshhold */
2402 if (!list_empty(&cli->cl_cache_waiters) &&
2403 !list_empty(&cli->cl_loi_write_list))
2404 RETURN(list_entry(cli->cl_loi_write_list.next,
2405 struct lov_oinfo, loi_write_item));
2407 /* then return all queued objects when we have an invalid import
2408 * so that they get flushed */
2409 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2410 if (!list_empty(&cli->cl_loi_write_list))
2411 RETURN(list_entry(cli->cl_loi_write_list.next,
2412 struct lov_oinfo, loi_write_item));
2413 if (!list_empty(&cli->cl_loi_read_list))
2414 RETURN(list_entry(cli->cl_loi_read_list.next,
2415 struct lov_oinfo, loi_read_item));
2420 static int osc_max_rpc_in_flight(struct client_obd *cli, struct lov_oinfo *loi)
2422 struct osc_async_page *oap;
2425 if (!list_empty(&loi->loi_write_lop.lop_urgent)) {
2426 oap = list_entry(loi->loi_write_lop.lop_urgent.next,
2427 struct osc_async_page, oap_urgent_item);
2428 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2431 if (!hprpc && !list_empty(&loi->loi_read_lop.lop_urgent)) {
2432 oap = list_entry(loi->loi_write_lop.lop_urgent.next,
2433 struct osc_async_page, oap_urgent_item);
2434 hprpc = !!(oap->oap_async_flags & ASYNC_HP);
2437 return rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight + hprpc;
2440 /* called with the loi list lock held */
2441 static void osc_check_rpcs(struct client_obd *cli)
2443 struct lov_oinfo *loi;
2444 int rc = 0, race_counter = 0;
2447 while ((loi = osc_next_loi(cli)) != NULL) {
2448 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2450 if (osc_max_rpc_in_flight(cli, loi))
2453 /* attempt some read/write balancing by alternating between
2454 * reads and writes in an object. The makes_rpc checks here
2455 * would be redundant if we were getting read/write work items
2456 * instead of objects. we don't want send_oap_rpc to drain a
2457 * partial read pending queue when we're given this object to
2458 * do io on writes while there are cache waiters */
2459 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2460 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_WRITE,
2461 &loi->loi_write_lop);
2469 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2470 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_READ,
2471 &loi->loi_read_lop);
2480 /* attempt some inter-object balancing by issueing rpcs
2481 * for each object in turn */
2482 if (!list_empty(&loi->loi_hp_ready_item))
2483 list_del_init(&loi->loi_hp_ready_item);
2484 if (!list_empty(&loi->loi_ready_item))
2485 list_del_init(&loi->loi_ready_item);
2486 if (!list_empty(&loi->loi_write_item))
2487 list_del_init(&loi->loi_write_item);
2488 if (!list_empty(&loi->loi_read_item))
2489 list_del_init(&loi->loi_read_item);
2491 loi_list_maint(cli, loi);
2493 /* send_oap_rpc fails with 0 when make_ready tells it to
2494 * back off. llite's make_ready does this when it tries
2495 * to lock a page queued for write that is already locked.
2496 * we want to try sending rpcs from many objects, but we
2497 * don't want to spin failing with 0. */
2498 if (race_counter == 10)
2504 /* we're trying to queue a page in the osc so we're subject to the
2505 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2506 * If the osc's queued pages are already at that limit, then we want to sleep
2507 * until there is space in the osc's queue for us. We also may be waiting for
2508 * write credits from the OST if there are RPCs in flight that may return some
2509 * before we fall back to sync writes.
2511 * We need this know our allocation was granted in the presence of signals */
2512 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2516 client_obd_list_lock(&cli->cl_loi_list_lock);
2517 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2518 client_obd_list_unlock(&cli->cl_loi_list_lock);
2522 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2523 * grant or cache space. */
2524 static int osc_enter_cache(struct client_obd *cli, struct lov_oinfo *loi,
2525 struct osc_async_page *oap)
2527 struct osc_cache_waiter ocw;
2528 struct l_wait_info lwi = { 0 };
2531 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2532 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2533 cli->cl_dirty_max, obd_max_dirty_pages,
2534 cli->cl_lost_grant, cli->cl_avail_grant);
2536 /* force the caller to try sync io. this can jump the list
2537 * of queued writes and create a discontiguous rpc stream */
2538 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2539 loi->loi_ar.ar_force_sync)
2542 /* Hopefully normal case - cache space and write credits available */
2543 if ((cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max) &&
2544 (atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages) &&
2545 (cli->cl_avail_grant >= CFS_PAGE_SIZE)) {
2546 /* account for ourselves */
2547 osc_consume_write_grant(cli, &oap->oap_brw_page);
2551 /* Make sure that there are write rpcs in flight to wait for. This
2552 * is a little silly as this object may not have any pending but
2553 * other objects sure might. */
2554 if (cli->cl_w_in_flight) {
2555 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2556 cfs_waitq_init(&ocw.ocw_waitq);
2560 loi_list_maint(cli, loi);
2561 osc_check_rpcs(cli);
2562 client_obd_list_unlock(&cli->cl_loi_list_lock);
2564 CDEBUG(D_CACHE, "sleeping for cache space\n");
2565 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2567 client_obd_list_lock(&cli->cl_loi_list_lock);
2568 if (!list_empty(&ocw.ocw_entry)) {
2569 list_del(&ocw.ocw_entry);
2578 static int osc_reget_short_lock(struct obd_export *exp,
2579 struct lov_stripe_md *lsm,
2581 obd_off start, obd_off end,
2584 struct osc_async_page *oap = *res;
2589 spin_lock(&oap->oap_lock);
2590 rc = ldlm_lock_fast_match(oap->oap_ldlm_lock, rw,
2591 start, end, cookie);
2592 spin_unlock(&oap->oap_lock);
2597 static int osc_release_short_lock(struct obd_export *exp,
2598 struct lov_stripe_md *lsm, obd_off end,
2599 void *cookie, int rw)
2602 ldlm_lock_fast_release(cookie, rw);
2603 /* no error could have happened at this layer */
2607 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2608 struct lov_oinfo *loi, cfs_page_t *page,
2609 obd_off offset, struct obd_async_page_ops *ops,
2610 void *data, void **res, int nocache,
2611 struct lustre_handle *lockh)
2613 struct osc_async_page *oap;
2614 struct ldlm_res_id oid = {{0}};
2620 return size_round(sizeof(*oap));
2623 oap->oap_magic = OAP_MAGIC;
2624 oap->oap_cli = &exp->exp_obd->u.cli;
2627 oap->oap_caller_ops = ops;
2628 oap->oap_caller_data = data;
2630 oap->oap_page = page;
2631 oap->oap_obj_off = offset;
2633 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2634 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2635 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2636 CFS_INIT_LIST_HEAD(&oap->oap_page_list);
2638 oap->oap_occ.occ_interrupted = osc_occ_interrupted;
2640 spin_lock_init(&oap->oap_lock);
2642 /* If the page was marked as notcacheable - don't add to any locks */
2644 osc_build_res_name(loi->loi_id, loi->loi_gr, &oid);
2645 /* This is the only place where we can call cache_add_extent
2646 without oap_lock, because this page is locked now, and
2647 the lock we are adding it to is referenced, so cannot lose
2648 any pages either. */
2649 rc = cache_add_extent(oap->oap_cli->cl_cache, &oid, oap, lockh);
2654 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2658 struct osc_async_page *oap_from_cookie(void *cookie)
2660 struct osc_async_page *oap = cookie;
2661 if (oap->oap_magic != OAP_MAGIC)
2662 return ERR_PTR(-EINVAL);
2666 static int osc_queue_async_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2667 struct lov_oinfo *loi, void *cookie,
2668 int cmd, obd_off off, int count,
2669 obd_flag brw_flags, enum async_flags async_flags)
2671 struct client_obd *cli = &exp->exp_obd->u.cli;
2672 struct osc_async_page *oap;
2676 oap = oap_from_cookie(cookie);
2678 RETURN(PTR_ERR(oap));
2680 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2683 if (!list_empty(&oap->oap_pending_item) ||
2684 !list_empty(&oap->oap_urgent_item) ||
2685 !list_empty(&oap->oap_rpc_item))
2688 /* check if the file's owner/group is over quota */
2689 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)){
2690 struct obd_async_page_ops *ops;
2697 ops = oap->oap_caller_ops;
2698 ops->ap_fill_obdo(oap->oap_caller_data, cmd, oa);
2699 if (lquota_chkdq(quota_interface, cli, oa->o_uid, oa->o_gid) ==
2709 loi = lsm->lsm_oinfo[0];
2711 client_obd_list_lock(&cli->cl_loi_list_lock);
2714 oap->oap_page_off = off;
2715 oap->oap_count = count;
2716 oap->oap_brw_flags = brw_flags;
2717 oap->oap_async_flags = async_flags;
2719 if (cmd & OBD_BRW_WRITE) {
2720 rc = osc_enter_cache(cli, loi, oap);
2722 client_obd_list_unlock(&cli->cl_loi_list_lock);
2727 osc_oap_to_pending(oap);
2728 loi_list_maint(cli, loi);
2730 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2733 osc_check_rpcs(cli);
2734 client_obd_list_unlock(&cli->cl_loi_list_lock);
2739 /* aka (~was & now & flag), but this is more clear :) */
2740 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2742 static int osc_set_async_flags(struct obd_export *exp,
2743 struct lov_stripe_md *lsm,
2744 struct lov_oinfo *loi, void *cookie,
2745 obd_flag async_flags)
2747 struct client_obd *cli = &exp->exp_obd->u.cli;
2748 struct loi_oap_pages *lop;
2749 struct osc_async_page *oap;
2753 oap = oap_from_cookie(cookie);
2755 RETURN(PTR_ERR(oap));
2758 * bug 7311: OST-side locking is only supported for liblustre for now
2759 * (and liblustre never calls obd_set_async_flags(). I hope.), generic
2760 * implementation has to handle case where OST-locked page was picked
2761 * up by, e.g., ->writepage().
2763 LASSERT(!(oap->oap_brw_flags & OBD_BRW_SRVLOCK));
2764 LASSERT(!LIBLUSTRE_CLIENT); /* check that liblustre angels do fear to
2767 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2771 loi = lsm->lsm_oinfo[0];
2773 if (oap->oap_cmd & OBD_BRW_WRITE) {
2774 lop = &loi->loi_write_lop;
2776 lop = &loi->loi_read_lop;
2779 client_obd_list_lock(&cli->cl_loi_list_lock);
2781 if (list_empty(&oap->oap_pending_item))
2782 GOTO(out, rc = -EINVAL);
2784 if ((oap->oap_async_flags & async_flags) == async_flags)
2787 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2788 oap->oap_async_flags |= ASYNC_READY;
2790 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT) &&
2791 list_empty(&oap->oap_rpc_item)) {
2792 if (oap->oap_async_flags & ASYNC_HP)
2793 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2795 list_add_tail(&oap->oap_urgent_item, &lop->lop_urgent);
2796 oap->oap_async_flags |= ASYNC_URGENT;
2797 loi_list_maint(cli, loi);
2800 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2801 oap->oap_async_flags);
2803 osc_check_rpcs(cli);
2804 client_obd_list_unlock(&cli->cl_loi_list_lock);
2808 static int osc_queue_group_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2809 struct lov_oinfo *loi,
2810 struct obd_io_group *oig, void *cookie,
2811 int cmd, obd_off off, int count,
2813 obd_flag async_flags)
2815 struct client_obd *cli = &exp->exp_obd->u.cli;
2816 struct osc_async_page *oap;
2817 struct loi_oap_pages *lop;
2821 oap = oap_from_cookie(cookie);
2823 RETURN(PTR_ERR(oap));
2825 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2828 if (!list_empty(&oap->oap_pending_item) ||
2829 !list_empty(&oap->oap_urgent_item) ||
2830 !list_empty(&oap->oap_rpc_item))
2834 loi = lsm->lsm_oinfo[0];
2836 client_obd_list_lock(&cli->cl_loi_list_lock);
2839 oap->oap_page_off = off;
2840 oap->oap_count = count;
2841 oap->oap_brw_flags = brw_flags;
2842 oap->oap_async_flags = async_flags;
2844 if (cmd & OBD_BRW_WRITE)
2845 lop = &loi->loi_write_lop;
2847 lop = &loi->loi_read_lop;
2849 list_add_tail(&oap->oap_pending_item, &lop->lop_pending_group);
2850 if (oap->oap_async_flags & ASYNC_GROUP_SYNC) {
2852 rc = oig_add_one(oig, &oap->oap_occ);
2855 LOI_DEBUG(loi, "oap %p page %p on group pending: rc %d\n",
2856 oap, oap->oap_page, rc);
2858 client_obd_list_unlock(&cli->cl_loi_list_lock);
2863 static void osc_group_to_pending(struct client_obd *cli, struct lov_oinfo *loi,
2864 struct loi_oap_pages *lop, int cmd)
2866 struct list_head *pos, *tmp;
2867 struct osc_async_page *oap;
2869 list_for_each_safe(pos, tmp, &lop->lop_pending_group) {
2870 oap = list_entry(pos, struct osc_async_page, oap_pending_item);
2871 list_del(&oap->oap_pending_item);
2872 osc_oap_to_pending(oap);
2874 loi_list_maint(cli, loi);
2877 static int osc_trigger_group_io(struct obd_export *exp,
2878 struct lov_stripe_md *lsm,
2879 struct lov_oinfo *loi,
2880 struct obd_io_group *oig)
2882 struct client_obd *cli = &exp->exp_obd->u.cli;
2886 loi = lsm->lsm_oinfo[0];
2888 client_obd_list_lock(&cli->cl_loi_list_lock);
2890 osc_group_to_pending(cli, loi, &loi->loi_write_lop, OBD_BRW_WRITE);
2891 osc_group_to_pending(cli, loi, &loi->loi_read_lop, OBD_BRW_READ);
2893 osc_check_rpcs(cli);
2894 client_obd_list_unlock(&cli->cl_loi_list_lock);
2899 static int osc_teardown_async_page(struct obd_export *exp,
2900 struct lov_stripe_md *lsm,
2901 struct lov_oinfo *loi, void *cookie)
2903 struct client_obd *cli = &exp->exp_obd->u.cli;
2904 struct loi_oap_pages *lop;
2905 struct osc_async_page *oap;
2909 oap = oap_from_cookie(cookie);
2911 RETURN(PTR_ERR(oap));
2914 loi = lsm->lsm_oinfo[0];
2916 if (oap->oap_cmd & OBD_BRW_WRITE) {
2917 lop = &loi->loi_write_lop;
2919 lop = &loi->loi_read_lop;
2922 client_obd_list_lock(&cli->cl_loi_list_lock);
2924 if (!list_empty(&oap->oap_rpc_item))
2925 GOTO(out, rc = -EBUSY);
2927 osc_exit_cache(cli, oap, 0);
2928 osc_wake_cache_waiters(cli);
2930 if (!list_empty(&oap->oap_urgent_item)) {
2931 list_del_init(&oap->oap_urgent_item);
2932 oap->oap_async_flags &= ~(ASYNC_URGENT | ASYNC_HP);
2935 if (!list_empty(&oap->oap_pending_item)) {
2936 list_del_init(&oap->oap_pending_item);
2937 lop_update_pending(cli, lop, oap->oap_cmd, -1);
2939 loi_list_maint(cli, loi);
2940 cache_remove_extent(cli->cl_cache, oap);
2942 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
2944 client_obd_list_unlock(&cli->cl_loi_list_lock);
2948 int osc_extent_blocking_cb(struct ldlm_lock *lock,
2949 struct ldlm_lock_desc *new, void *data,
2952 struct lustre_handle lockh = { 0 };
2956 if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
2957 LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
2962 case LDLM_CB_BLOCKING:
2963 ldlm_lock2handle(lock, &lockh);
2964 rc = ldlm_cli_cancel(&lockh);
2966 CERROR("ldlm_cli_cancel failed: %d\n", rc);
2968 case LDLM_CB_CANCELING: {
2970 ldlm_lock2handle(lock, &lockh);
2971 /* This lock wasn't granted, don't try to do anything */
2972 if (lock->l_req_mode != lock->l_granted_mode)
2975 cache_remove_lock(lock->l_conn_export->exp_obd->u.cli.cl_cache,
2978 if (lock->l_conn_export->exp_obd->u.cli.cl_ext_lock_cancel_cb)
2979 lock->l_conn_export->exp_obd->u.cli.cl_ext_lock_cancel_cb(
2980 lock, new, data,flag);
2989 EXPORT_SYMBOL(osc_extent_blocking_cb);
2991 static void osc_set_data_with_check(struct lustre_handle *lockh, void *data,
2994 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2997 CERROR("lockh %p, data %p - client evicted?\n", lockh, data);
3000 lock_res_and_lock(lock);
3001 #if defined (__KERNEL__) && defined (__linux__)
3002 /* Liang XXX: Darwin and Winnt checking should be added */
3003 if (lock->l_ast_data && lock->l_ast_data != data) {
3004 struct inode *new_inode = data;
3005 struct inode *old_inode = lock->l_ast_data;
3006 if (!(old_inode->i_state & I_FREEING))
3007 LDLM_ERROR(lock, "inconsistent l_ast_data found");
3008 LASSERTF(old_inode->i_state & I_FREEING,
3009 "Found existing inode %p/%lu/%u state %lu in lock: "
3010 "setting data to %p/%lu/%u\n", old_inode,
3011 old_inode->i_ino, old_inode->i_generation,
3013 new_inode, new_inode->i_ino, new_inode->i_generation);
3016 lock->l_ast_data = data;
3017 lock->l_flags |= (flags & LDLM_FL_NO_LRU);
3018 unlock_res_and_lock(lock);
3019 LDLM_LOCK_PUT(lock);
3022 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
3023 ldlm_iterator_t replace, void *data)
3025 struct ldlm_res_id res_id;
3026 struct obd_device *obd = class_exp2obd(exp);
3028 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_gr, &res_id);
3029 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
3033 static int osc_enqueue_fini(struct obd_device *obd, struct ptlrpc_request *req,
3034 struct obd_info *oinfo, int intent, int rc)
3039 /* The request was created before ldlm_cli_enqueue call. */
3040 if (rc == ELDLM_LOCK_ABORTED) {
3041 struct ldlm_reply *rep;
3043 /* swabbed by ldlm_cli_enqueue() */
3044 LASSERT(lustre_rep_swabbed(req, DLM_LOCKREPLY_OFF));
3045 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
3047 LASSERT(rep != NULL);
3048 if (rep->lock_policy_res1)
3049 rc = rep->lock_policy_res1;
3053 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
3054 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
3055 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_size,
3056 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_blocks,
3057 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_mtime);
3061 cache_add_lock(obd->u.cli.cl_cache, oinfo->oi_lockh);
3063 /* Call the update callback. */
3064 rc = oinfo->oi_cb_up(oinfo, rc);
3068 static int osc_enqueue_interpret(struct ptlrpc_request *req,
3069 struct osc_enqueue_args *aa, int rc)
3071 int intent = aa->oa_oi->oi_flags & LDLM_FL_HAS_INTENT;
3072 struct lov_stripe_md *lsm = aa->oa_oi->oi_md;
3073 struct ldlm_lock *lock;
3075 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
3077 lock = ldlm_handle2lock(aa->oa_oi->oi_lockh);
3079 /* Complete obtaining the lock procedure. */
3080 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
3082 &aa->oa_oi->oi_flags,
3083 &lsm->lsm_oinfo[0]->loi_lvb,
3084 sizeof(lsm->lsm_oinfo[0]->loi_lvb),
3085 lustre_swab_ost_lvb,
3086 aa->oa_oi->oi_lockh, rc);
3088 /* Complete osc stuff. */
3089 rc = osc_enqueue_fini(aa->oa_exp->exp_obd, req, aa->oa_oi, intent, rc);
3091 /* Release the lock for async request. */
3092 if (lustre_handle_is_used(aa->oa_oi->oi_lockh) && rc == ELDLM_OK)
3093 ldlm_lock_decref(aa->oa_oi->oi_lockh, aa->oa_ei->ei_mode);
3095 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
3096 aa->oa_oi->oi_lockh, req, aa);
3097 LDLM_LOCK_PUT(lock);
3101 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
3102 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
3103 * other synchronous requests, however keeping some locks and trying to obtain
3104 * others may take a considerable amount of time in a case of ost failure; and
3105 * when other sync requests do not get released lock from a client, the client
3106 * is excluded from the cluster -- such scenarious make the life difficult, so
3107 * release locks just after they are obtained. */
3108 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
3109 struct ldlm_enqueue_info *einfo,
3110 struct ptlrpc_request_set *rqset)
3112 struct ldlm_res_id res_id;
3113 struct obd_device *obd = exp->exp_obd;
3114 struct ldlm_reply *rep;
3115 struct ptlrpc_request *req = NULL;
3116 int intent = oinfo->oi_flags & LDLM_FL_HAS_INTENT;
3121 osc_build_res_name(oinfo->oi_md->lsm_object_id,
3122 oinfo->oi_md->lsm_object_gr, &res_id);
3123 /* Filesystem lock extents are extended to page boundaries so that
3124 * dealing with the page cache is a little smoother. */
3125 oinfo->oi_policy.l_extent.start -=
3126 oinfo->oi_policy.l_extent.start & ~CFS_PAGE_MASK;
3127 oinfo->oi_policy.l_extent.end |= ~CFS_PAGE_MASK;
3129 if (oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid == 0)
3132 /* Next, search for already existing extent locks that will cover us */
3133 /* If we're trying to read, we also search for an existing PW lock. The
3134 * VFS and page cache already protect us locally, so lots of readers/
3135 * writers can share a single PW lock.
3137 * There are problems with conversion deadlocks, so instead of
3138 * converting a read lock to a write lock, we'll just enqueue a new
3141 * At some point we should cancel the read lock instead of making them
3142 * send us a blocking callback, but there are problems with canceling
3143 * locks out from other users right now, too. */
3144 mode = einfo->ei_mode;
3145 if (einfo->ei_mode == LCK_PR)
3147 mode = ldlm_lock_match(obd->obd_namespace,
3148 oinfo->oi_flags | LDLM_FL_LVB_READY, &res_id,
3149 einfo->ei_type, &oinfo->oi_policy, mode,
3152 /* addref the lock only if not async requests and PW lock is
3153 * matched whereas we asked for PR. */
3154 if (!rqset && einfo->ei_mode != mode)
3155 ldlm_lock_addref(oinfo->oi_lockh, LCK_PR);
3156 osc_set_data_with_check(oinfo->oi_lockh, einfo->ei_cbdata,
3159 /* I would like to be able to ASSERT here that rss <=
3160 * kms, but I can't, for reasons which are explained in
3164 /* We already have a lock, and it's referenced */
3165 oinfo->oi_cb_up(oinfo, ELDLM_OK);
3167 /* For async requests, decref the lock. */
3168 if (einfo->ei_mode != mode)
3169 ldlm_lock_decref(oinfo->oi_lockh, LCK_PW);
3171 ldlm_lock_decref(oinfo->oi_lockh, einfo->ei_mode);
3179 [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
3180 [DLM_LOCKREQ_OFF] = sizeof(struct ldlm_request),
3181 [DLM_LOCKREQ_OFF + 1] = 0 };
3183 req = ldlm_prep_enqueue_req(exp, 2, size, NULL, 0);
3187 size[DLM_LOCKREPLY_OFF] = sizeof(*rep);
3188 size[DLM_REPLY_REC_OFF] =
3189 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb);
3190 ptlrpc_req_set_repsize(req, 3, size);
3193 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
3194 oinfo->oi_flags &= ~LDLM_FL_BLOCK_GRANTED;
3196 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id,
3197 &oinfo->oi_policy, &oinfo->oi_flags,
3198 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
3199 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb),
3200 lustre_swab_ost_lvb, oinfo->oi_lockh,
3204 struct osc_enqueue_args *aa;
3205 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
3206 aa = ptlrpc_req_async_args(req);
3211 req->rq_interpret_reply = osc_enqueue_interpret;
3212 ptlrpc_set_add_req(rqset, req);
3213 } else if (intent) {
3214 ptlrpc_req_finished(req);
3219 rc = osc_enqueue_fini(obd, req, oinfo, intent, rc);
3221 ptlrpc_req_finished(req);
3226 static int osc_match(struct obd_export *exp, struct lov_stripe_md *lsm,
3227 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3228 int *flags, void *data, struct lustre_handle *lockh,
3231 struct ldlm_res_id res_id;
3232 struct obd_device *obd = exp->exp_obd;
3233 int lflags = *flags;
3237 osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_gr, &res_id);
3239 OBD_FAIL_RETURN(OBD_FAIL_OSC_MATCH, -EIO);
3241 /* Filesystem lock extents are extended to page boundaries so that
3242 * dealing with the page cache is a little smoother */
3243 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3244 policy->l_extent.end |= ~CFS_PAGE_MASK;
3246 /* Next, search for already existing extent locks that will cover us */
3247 /* If we're trying to read, we also search for an existing PW lock. The
3248 * VFS and page cache already protect us locally, so lots of readers/
3249 * writers can share a single PW lock. */
3253 rc = ldlm_lock_match(obd->obd_namespace, lflags | LDLM_FL_LVB_READY,
3254 &res_id, type, policy, rc, lockh);
3256 osc_set_data_with_check(lockh, data, lflags);
3257 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3258 ldlm_lock_addref(lockh, LCK_PR);
3259 ldlm_lock_decref(lockh, LCK_PW);
3261 if (n_matches != NULL)
3268 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3269 __u32 mode, struct lustre_handle *lockh)
3273 if (unlikely(mode == LCK_GROUP))
3274 ldlm_lock_decref_and_cancel(lockh, mode);
3276 ldlm_lock_decref(lockh, mode);
3281 static int osc_cancel_unused(struct obd_export *exp,
3282 struct lov_stripe_md *lsm, int flags, void *opaque)
3284 struct obd_device *obd = class_exp2obd(exp);
3285 struct ldlm_res_id res_id, *resp = NULL;
3288 resp = osc_build_res_name(lsm->lsm_object_id,
3289 lsm->lsm_object_gr, &res_id);
3292 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3296 static int osc_join_lru(struct obd_export *exp,
3297 struct lov_stripe_md *lsm, int join)
3299 struct obd_device *obd = class_exp2obd(exp);
3300 struct ldlm_res_id res_id, *resp = NULL;
3303 resp = osc_build_res_name(lsm->lsm_object_id,
3304 lsm->lsm_object_gr, &res_id);
3307 return ldlm_cli_join_lru(obd->obd_namespace, resp, join);
3311 static int osc_statfs_interpret(struct ptlrpc_request *req,
3312 struct osc_async_args *aa, int rc)
3314 struct obd_statfs *msfs;
3320 msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
3321 lustre_swab_obd_statfs);
3323 CERROR("Can't unpack obd_statfs\n");
3324 GOTO(out, rc = -EPROTO);
3327 memcpy(aa->aa_oi->oi_osfs, msfs, sizeof(*msfs));
3329 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3333 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3334 __u64 max_age, struct ptlrpc_request_set *rqset)
3336 struct ptlrpc_request *req;
3337 struct osc_async_args *aa;
3338 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*oinfo->oi_osfs) };
3341 /* We could possibly pass max_age in the request (as an absolute
3342 * timestamp or a "seconds.usec ago") so the target can avoid doing
3343 * extra calls into the filesystem if that isn't necessary (e.g.
3344 * during mount that would help a bit). Having relative timestamps
3345 * is not so great if request processing is slow, while absolute
3346 * timestamps are not ideal because they need time synchronization. */
3347 req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OST_VERSION,
3348 OST_STATFS, 1, NULL, NULL);
3352 ptlrpc_req_set_repsize(req, 2, size);
3353 req->rq_request_portal = OST_CREATE_PORTAL;
3354 ptlrpc_at_set_req_timeout(req);
3355 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
3356 /* procfs requests not want stat in wait for avoid deadlock */
3357 req->rq_no_resend = 1;
3358 req->rq_no_delay = 1;
3361 req->rq_interpret_reply = osc_statfs_interpret;
3362 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
3363 aa = ptlrpc_req_async_args(req);
3366 ptlrpc_set_add_req(rqset, req);
3370 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3371 __u64 max_age, __u32 flags)
3373 struct obd_statfs *msfs;
3374 struct ptlrpc_request *req;
3375 struct obd_import *imp = NULL;
3376 __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*osfs) };
3380 /*Since the request might also come from lprocfs, so we need
3381 *sync this with client_disconnect_export Bug15684*/
3382 down_read(&obd->u.cli.cl_sem);
3383 if (obd->u.cli.cl_import)
3384 imp = class_import_get(obd->u.cli.cl_import);
3385 up_read(&obd->u.cli.cl_sem);
3389 /* We could possibly pass max_age in the request (as an absolute
3390 * timestamp or a "seconds.usec ago") so the target can avoid doing
3391 * extra calls into the filesystem if that isn't necessary (e.g.
3392 * during mount that would help a bit). Having relative timestamps
3393 * is not so great if request processing is slow, while absolute
3394 * timestamps are not ideal because they need time synchronization. */
3395 req = ptlrpc_prep_req(imp, LUSTRE_OST_VERSION,
3396 OST_STATFS, 1, NULL, NULL);
3398 class_import_put(imp);
3402 ptlrpc_req_set_repsize(req, 2, size);
3403 req->rq_request_portal = OST_CREATE_PORTAL;
3404 ptlrpc_at_set_req_timeout(req);
3406 if (flags & OBD_STATFS_NODELAY) {
3407 /* procfs requests not want stat in wait for avoid deadlock */
3408 req->rq_no_resend = 1;
3409 req->rq_no_delay = 1;
3412 rc = ptlrpc_queue_wait(req);
3416 msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
3417 lustre_swab_obd_statfs);
3419 CERROR("Can't unpack obd_statfs\n");
3420 GOTO(out, rc = -EPROTO);
3423 memcpy(osfs, msfs, sizeof(*osfs));
3427 ptlrpc_req_finished(req);
3431 /* Retrieve object striping information.
3433 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3434 * the maximum number of OST indices which will fit in the user buffer.
3435 * lmm_magic must be LOV_MAGIC_V1 or LOV_MAGIC_V3 (we only use 1 slot here).
3437 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3439 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
3440 struct lov_user_md_v3 lum, *lumk;
3441 int rc = 0, lum_size;
3442 struct lov_user_ost_data_v1 *lmm_objects;
3448 /* we only need the header part from user space to get lmm_magic and
3449 * lmm_stripe_count, (the header part is common to v1 and v3) */
3450 lum_size = sizeof(struct lov_user_md_v1);
3451 if (copy_from_user(&lum, lump, lum_size))
3454 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
3455 (lum.lmm_magic != LOV_USER_MAGIC_V3))
3458 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
3459 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
3460 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
3461 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
3463 /* we can use lov_mds_md_size() to compute lum_size
3464 * because lov_user_md_vX and lov_mds_md_vX have the same size */
3465 if (lum.lmm_stripe_count > 0) {
3466 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
3467 OBD_ALLOC(lumk, lum_size);
3470 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
3471 lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
3473 lmm_objects = &(lumk->lmm_objects[0]);
3474 lmm_objects->l_object_id = lsm->lsm_object_id;
3476 lum_size = lov_mds_md_size(0, lum.lmm_magic);
3480 lumk->lmm_object_id = lsm->lsm_object_id;
3481 lumk->lmm_stripe_count = 1;
3483 if (copy_to_user(lump, lumk, lum_size))
3487 OBD_FREE(lumk, lum_size);
3493 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3494 void *karg, void *uarg)
3496 struct obd_device *obd = exp->exp_obd;
3497 struct obd_ioctl_data *data = karg;
3501 if (!try_module_get(THIS_MODULE)) {
3502 CERROR("Can't get module. Is it alive?");
3506 case OBD_IOC_LOV_GET_CONFIG: {
3508 struct lov_desc *desc;
3509 struct obd_uuid uuid;
3513 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3514 GOTO(out, err = -EINVAL);
3516 data = (struct obd_ioctl_data *)buf;
3518 if (sizeof(*desc) > data->ioc_inllen1) {
3519 obd_ioctl_freedata(buf, len);
3520 GOTO(out, err = -EINVAL);
3523 if (data->ioc_inllen2 < sizeof(uuid)) {
3524 obd_ioctl_freedata(buf, len);
3525 GOTO(out, err = -EINVAL);
3528 desc = (struct lov_desc *)data->ioc_inlbuf1;
3529 desc->ld_tgt_count = 1;
3530 desc->ld_active_tgt_count = 1;
3531 desc->ld_default_stripe_count = 1;
3532 desc->ld_default_stripe_size = 0;
3533 desc->ld_default_stripe_offset = 0;
3534 desc->ld_pattern = 0;
3535 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3537 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3539 err = copy_to_user((void *)uarg, buf, len);
3542 obd_ioctl_freedata(buf, len);
3545 case LL_IOC_LOV_SETSTRIPE:
3546 err = obd_alloc_memmd(exp, karg);
3550 case LL_IOC_LOV_GETSTRIPE:
3551 err = osc_getstripe(karg, uarg);
3553 case OBD_IOC_CLIENT_RECOVER:
3554 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3559 case IOC_OSC_SET_ACTIVE:
3560 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3563 case OBD_IOC_POLL_QUOTACHECK:
3564 err = lquota_poll_check(quota_interface, exp,
3565 (struct if_quotacheck *)karg);
3567 case OBD_IOC_DESTROY: {
3570 if (!cfs_capable(CFS_CAP_SYS_ADMIN))
3571 GOTO (out, err = -EPERM);
3572 oa = &data->ioc_obdo1;
3575 GOTO(out, err = -EINVAL);
3577 oa->o_valid |= OBD_MD_FLGROUP;
3579 err = osc_destroy(exp, oa, NULL, NULL, NULL);
3582 case OBD_IOC_PING_TARGET:
3583 err = ptlrpc_obd_ping(obd);
3586 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3587 cmd, cfs_curproc_comm());
3588 GOTO(out, err = -ENOTTY);
3591 module_put(THIS_MODULE);
3595 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3596 void *key, __u32 *vallen, void *val, struct lov_stripe_md *lsm)
3599 if (!vallen || !val)
3602 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
3603 __u32 *stripe = val;
3604 *vallen = sizeof(*stripe);
3607 } else if (KEY_IS(KEY_LAST_ID)) {
3608 struct ptlrpc_request *req;
3610 char *bufs[2] = { NULL, key };
3611 __u32 size[2] = { sizeof(struct ptlrpc_body), keylen };
3614 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
3615 OST_GET_INFO, 2, size, bufs);
3619 size[REPLY_REC_OFF] = *vallen;
3620 ptlrpc_req_set_repsize(req, 2, size);
3621 rc = ptlrpc_queue_wait(req);
3625 reply = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*reply),
3626 lustre_swab_ost_last_id);
3627 if (reply == NULL) {
3628 CERROR("Can't unpack OST last ID\n");
3629 GOTO(out, rc = -EPROTO);
3631 *((obd_id *)val) = *reply;
3633 ptlrpc_req_finished(req);
3635 } else if (KEY_IS(KEY_FIEMAP)) {
3636 struct ptlrpc_request *req;
3637 struct ll_user_fiemap *reply;
3638 char *bufs[2] = { NULL, key };
3639 __u32 size[2] = { sizeof(struct ptlrpc_body), keylen };
3642 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
3643 OST_GET_INFO, 2, size, bufs);
3647 size[REPLY_REC_OFF] = *vallen;
3648 ptlrpc_req_set_repsize(req, 2, size);
3650 rc = ptlrpc_queue_wait(req);
3653 reply = lustre_swab_repbuf(req, REPLY_REC_OFF, *vallen,
3654 lustre_swab_fiemap);
3655 if (reply == NULL) {
3656 CERROR("Can't unpack FIEMAP reply.\n");
3657 GOTO(out1, rc = -EPROTO);
3660 memcpy(val, reply, *vallen);
3663 ptlrpc_req_finished(req);
3671 static int osc_setinfo_mds_conn_interpret(struct ptlrpc_request *req,
3674 struct llog_ctxt *ctxt;
3675 struct obd_import *imp = req->rq_import;
3681 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3684 rc = llog_initiator_connect(ctxt);
3686 CERROR("cannot establish connection for "
3687 "ctxt %p: %d\n", ctxt, rc);
3690 llog_ctxt_put(ctxt);
3691 spin_lock(&imp->imp_lock);
3692 imp->imp_server_timeout = 1;
3693 imp->imp_pingable = 1;
3694 spin_unlock(&imp->imp_lock);
3695 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3700 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3701 void *key, obd_count vallen, void *val,
3702 struct ptlrpc_request_set *set)
3704 struct ptlrpc_request *req;
3705 struct obd_device *obd = exp->exp_obd;
3706 struct obd_import *imp = class_exp2cliimp(exp);
3707 __u32 size[3] = { sizeof(struct ptlrpc_body), keylen, vallen };
3708 char *bufs[3] = { NULL, key, val };
3711 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3713 if (KEY_IS(KEY_NEXT_ID)) {
3714 if (vallen != sizeof(obd_id))
3716 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3717 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3718 exp->exp_obd->obd_name,
3719 obd->u.cli.cl_oscc.oscc_next_id);
3724 if (KEY_IS(KEY_UNLINKED)) {
3725 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3726 spin_lock(&oscc->oscc_lock);
3727 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3728 spin_unlock(&oscc->oscc_lock);
3732 if (KEY_IS(KEY_INIT_RECOV)) {
3733 if (vallen != sizeof(int))
3735 spin_lock(&imp->imp_lock);
3736 imp->imp_initial_recov = *(int *)val;
3737 spin_unlock(&imp->imp_lock);
3738 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3739 exp->exp_obd->obd_name,
3740 imp->imp_initial_recov);
3744 if (KEY_IS(KEY_CHECKSUM)) {
3745 if (vallen != sizeof(int))
3747 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3754 /* We pass all other commands directly to OST. Since nobody calls osc
3755 methods directly and everybody is supposed to go through LOV, we
3756 assume lov checked invalid values for us.
3757 The only recognised values so far are evict_by_nid and mds_conn.
3758 Even if something bad goes through, we'd get a -EINVAL from OST
3761 req = ptlrpc_prep_req(imp, LUSTRE_OST_VERSION, OST_SET_INFO, 3, size,
3766 if (KEY_IS(KEY_MDS_CONN))
3767 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3769 ptlrpc_req_set_repsize(req, 1, NULL);
3770 ptlrpc_set_add_req(set, req);
3771 ptlrpc_check_set(set);
3777 static struct llog_operations osc_size_repl_logops = {
3778 lop_cancel: llog_obd_repl_cancel
3781 static struct llog_operations osc_mds_ost_orig_logops;
3782 static int osc_llog_init(struct obd_device *obd, struct obd_device *tgt,
3783 int count, struct llog_catid *catid,
3784 struct obd_uuid *uuid)
3789 spin_lock(&obd->obd_dev_lock);
3790 if (osc_mds_ost_orig_logops.lop_setup != llog_obd_origin_setup) {
3791 osc_mds_ost_orig_logops = llog_lvfs_ops;
3792 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
3793 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
3794 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
3795 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
3797 spin_unlock(&obd->obd_dev_lock);
3799 rc = llog_setup(obd, LLOG_MDS_OST_ORIG_CTXT, tgt, count,
3800 &catid->lci_logid, &osc_mds_ost_orig_logops);
3802 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
3806 rc = llog_setup(obd, LLOG_SIZE_REPL_CTXT, tgt, count, NULL,
3807 &osc_size_repl_logops);
3809 struct llog_ctxt *ctxt =
3810 llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3813 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
3817 CERROR("osc '%s' tgt '%s' cnt %d catid %p rc=%d\n",
3818 obd->obd_name, tgt->obd_name, count, catid, rc);
3819 CERROR("logid "LPX64":0x%x\n",
3820 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
3825 static int osc_llog_finish(struct obd_device *obd, int count)
3827 struct llog_ctxt *ctxt;
3828 int rc = 0, rc2 = 0;
3831 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3833 rc = llog_cleanup(ctxt);
3835 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3837 rc2 = llog_cleanup(ctxt);
3844 static int osc_reconnect(struct obd_export *exp, struct obd_device *obd,
3845 struct obd_uuid *cluuid,
3846 struct obd_connect_data *data,
3849 struct client_obd *cli = &obd->u.cli;
3851 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3854 client_obd_list_lock(&cli->cl_loi_list_lock);
3855 data->ocd_grant = cli->cl_avail_grant ?:
3856 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
3857 lost_grant = cli->cl_lost_grant;
3858 cli->cl_lost_grant = 0;
3859 client_obd_list_unlock(&cli->cl_loi_list_lock);
3861 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
3862 "cl_lost_grant: %ld\n", data->ocd_grant,
3863 cli->cl_avail_grant, lost_grant);
3864 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
3865 " ocd_grant: %d\n", data->ocd_connect_flags,
3866 data->ocd_version, data->ocd_grant);
3872 static int osc_disconnect(struct obd_export *exp)
3874 struct obd_device *obd = class_exp2obd(exp);
3875 struct llog_ctxt *ctxt;
3878 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3880 if (obd->u.cli.cl_conn_count == 1) {
3881 /* Flush any remaining cancel messages out to the
3883 llog_sync(ctxt, exp);
3885 llog_ctxt_put(ctxt);
3887 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
3891 rc = client_disconnect_export(exp);
3895 static int osc_import_event(struct obd_device *obd,
3896 struct obd_import *imp,
3897 enum obd_import_event event)
3899 struct client_obd *cli;
3903 LASSERT(imp->imp_obd == obd);
3906 case IMP_EVENT_DISCON: {
3907 /* Only do this on the MDS OSC's */
3908 if (imp->imp_server_timeout) {
3909 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3911 spin_lock(&oscc->oscc_lock);
3912 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
3913 spin_unlock(&oscc->oscc_lock);
3916 client_obd_list_lock(&cli->cl_loi_list_lock);
3917 cli->cl_avail_grant = 0;
3918 cli->cl_lost_grant = 0;
3919 client_obd_list_unlock(&cli->cl_loi_list_lock);
3920 ptlrpc_import_setasync(imp, -1);
3924 case IMP_EVENT_INACTIVE: {
3925 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
3928 case IMP_EVENT_INVALIDATE: {
3929 struct ldlm_namespace *ns = obd->obd_namespace;
3933 client_obd_list_lock(&cli->cl_loi_list_lock);
3934 /* all pages go to failing rpcs due to the invalid import */
3935 osc_check_rpcs(cli);
3936 client_obd_list_unlock(&cli->cl_loi_list_lock);
3938 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3942 case IMP_EVENT_ACTIVE: {
3943 /* Only do this on the MDS OSC's */
3944 if (imp->imp_server_timeout) {
3945 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3947 spin_lock(&oscc->oscc_lock);
3948 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3949 spin_unlock(&oscc->oscc_lock);
3951 CDEBUG(D_INFO, "notify server \n");
3952 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3955 case IMP_EVENT_OCD: {
3956 struct obd_connect_data *ocd = &imp->imp_connect_data;
3958 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3959 osc_init_grant(&obd->u.cli, ocd);
3962 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3963 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3965 ptlrpc_import_setasync(imp, 1);
3966 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3970 CERROR("Unknown import event %d\n", event);
3976 int osc_setup(struct obd_device *obd, obd_count len, void *buf)
3982 rc = ptlrpcd_addref();
3986 rc = client_obd_setup(obd, len, buf);
3990 struct lprocfs_static_vars lvars = { 0 };
3991 struct client_obd *cli = &obd->u.cli;
3993 lprocfs_osc_init_vars(&lvars);
3994 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
3995 lproc_osc_attach_seqstat(obd);
3996 ptlrpc_lprocfs_register_obd(obd);
4000 /* We need to allocate a few requests more, because
4001 brw_interpret tries to create new requests before freeing
4002 previous ones. Ideally we want to have 2x max_rpcs_in_flight
4003 reserved, but I afraid that might be too much wasted RAM
4004 in fact, so 2 is just my guess and still should work. */
4005 cli->cl_import->imp_rq_pool =
4006 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
4008 ptlrpc_add_rqs_to_pool);
4009 cli->cl_cache = cache_create(obd);
4010 if (!cli->cl_cache) {
4019 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
4025 case OBD_CLEANUP_EARLY: {
4026 struct obd_import *imp;
4027 imp = obd->u.cli.cl_import;
4028 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
4029 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
4030 ptlrpc_deactivate_import(imp);
4033 case OBD_CLEANUP_EXPORTS: {
4034 /* If we set up but never connected, the
4035 client import will not have been cleaned. */
4036 if (obd->u.cli.cl_import) {
4037 struct obd_import *imp;
4038 down_write(&obd->u.cli.cl_sem);
4039 imp = obd->u.cli.cl_import;
4040 CDEBUG(D_CONFIG, "%s: client import never connected\n",
4042 ptlrpc_invalidate_import(imp);
4043 if (imp->imp_rq_pool) {
4044 ptlrpc_free_rq_pool(imp->imp_rq_pool);
4045 imp->imp_rq_pool = NULL;
4047 class_destroy_import(imp);
4048 up_write(&obd->u.cli.cl_sem);
4049 obd->u.cli.cl_import = NULL;
4051 rc = obd_llog_finish(obd, 0);
4053 CERROR("failed to cleanup llogging subsystems\n");
4056 case OBD_CLEANUP_SELF_EXP:
4058 case OBD_CLEANUP_OBD:
4064 int osc_cleanup(struct obd_device *obd)
4066 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
4070 ptlrpc_lprocfs_unregister_obd(obd);
4071 lprocfs_obd_cleanup(obd);
4073 spin_lock(&oscc->oscc_lock);
4074 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
4075 oscc->oscc_flags |= OSCC_FLAG_EXITING;
4076 spin_unlock(&oscc->oscc_lock);
4078 /* free memory of osc quota cache */
4079 lquota_cleanup(quota_interface, obd);
4081 cache_destroy(obd->u.cli.cl_cache);
4082 rc = client_obd_cleanup(obd);
4088 static int osc_register_page_removal_cb(struct obd_device *obd,
4089 obd_page_removal_cb_t func,
4090 obd_pin_extent_cb pin_cb)
4094 /* this server - not need init */
4098 return cache_add_extent_removal_cb(obd->u.cli.cl_cache, func,
4102 static int osc_unregister_page_removal_cb(struct obd_device *obd,
4103 obd_page_removal_cb_t func)
4106 return cache_del_extent_removal_cb(obd->u.cli.cl_cache, func);
4109 static int osc_register_lock_cancel_cb(struct obd_device *obd,
4110 obd_lock_cancel_cb cb)
4113 LASSERT(obd->u.cli.cl_ext_lock_cancel_cb == NULL);
4115 /* this server - not need init */
4119 obd->u.cli.cl_ext_lock_cancel_cb = cb;
4123 static int osc_unregister_lock_cancel_cb(struct obd_device *obd,
4124 obd_lock_cancel_cb cb)
4128 if (obd->u.cli.cl_ext_lock_cancel_cb != cb) {
4129 CERROR("Unregistering cancel cb %p, while only %p was "
4131 obd->u.cli.cl_ext_lock_cancel_cb);
4135 obd->u.cli.cl_ext_lock_cancel_cb = NULL;
4139 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
4141 struct lustre_cfg *lcfg = buf;
4142 struct lprocfs_static_vars lvars = { 0 };
4145 lprocfs_osc_init_vars(&lvars);
4147 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars, lcfg, obd);
4151 struct obd_ops osc_obd_ops = {
4152 .o_owner = THIS_MODULE,
4153 .o_setup = osc_setup,
4154 .o_precleanup = osc_precleanup,
4155 .o_cleanup = osc_cleanup,
4156 .o_add_conn = client_import_add_conn,
4157 .o_del_conn = client_import_del_conn,
4158 .o_connect = client_connect_import,
4159 .o_reconnect = osc_reconnect,
4160 .o_disconnect = osc_disconnect,
4161 .o_statfs = osc_statfs,
4162 .o_statfs_async = osc_statfs_async,
4163 .o_packmd = osc_packmd,
4164 .o_unpackmd = osc_unpackmd,
4165 .o_precreate = osc_precreate,
4166 .o_create = osc_create,
4167 .o_destroy = osc_destroy,
4168 .o_getattr = osc_getattr,
4169 .o_getattr_async = osc_getattr_async,
4170 .o_setattr = osc_setattr,
4171 .o_setattr_async = osc_setattr_async,
4173 .o_brw_async = osc_brw_async,
4174 .o_prep_async_page = osc_prep_async_page,
4175 .o_reget_short_lock = osc_reget_short_lock,
4176 .o_release_short_lock = osc_release_short_lock,
4177 .o_queue_async_io = osc_queue_async_io,
4178 .o_set_async_flags = osc_set_async_flags,
4179 .o_queue_group_io = osc_queue_group_io,
4180 .o_trigger_group_io = osc_trigger_group_io,
4181 .o_teardown_async_page = osc_teardown_async_page,
4182 .o_punch = osc_punch,
4184 .o_enqueue = osc_enqueue,
4185 .o_match = osc_match,
4186 .o_change_cbdata = osc_change_cbdata,
4187 .o_cancel = osc_cancel,
4188 .o_cancel_unused = osc_cancel_unused,
4189 .o_join_lru = osc_join_lru,
4190 .o_iocontrol = osc_iocontrol,
4191 .o_get_info = osc_get_info,
4192 .o_set_info_async = osc_set_info_async,
4193 .o_import_event = osc_import_event,
4194 .o_llog_init = osc_llog_init,
4195 .o_llog_finish = osc_llog_finish,
4196 .o_process_config = osc_process_config,
4197 .o_register_page_removal_cb = osc_register_page_removal_cb,
4198 .o_unregister_page_removal_cb = osc_unregister_page_removal_cb,
4199 .o_register_lock_cancel_cb = osc_register_lock_cancel_cb,
4200 .o_unregister_lock_cancel_cb = osc_unregister_lock_cancel_cb,
4202 int __init osc_init(void)
4204 struct lprocfs_static_vars lvars = { 0 };
4208 lprocfs_osc_init_vars(&lvars);
4210 request_module("lquota");
4211 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
4212 lquota_init(quota_interface);
4213 init_obd_quota_ops(quota_interface, &osc_obd_ops);
4215 rc = class_register_type(&osc_obd_ops, lvars.module_vars,
4218 if (quota_interface)
4219 PORTAL_SYMBOL_PUT(osc_quota_interface);
4227 static void /*__exit*/ osc_exit(void)
4229 lquota_exit(quota_interface);
4230 if (quota_interface)
4231 PORTAL_SYMBOL_PUT(osc_quota_interface);
4233 class_unregister_type(LUSTRE_OSC_NAME);
4236 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
4237 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
4238 MODULE_LICENSE("GPL");
4240 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob