1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
5 * Author Peter Braam <braam@clusterfs.com>
7 * This file is part of the Lustre file system, http://www.lustre.org
8 * Lustre is a trademark of Cluster File Systems, Inc.
10 * You may have signed or agreed to another license before downloading
11 * this software. If so, you are bound by the terms and conditions
12 * of that agreement, and the following does not apply to you. See the
13 * LICENSE file included with this distribution for more information.
15 * If you did not agree to a different license, then this copy of Lustre
16 * is open source software; you can redistribute it and/or modify it
17 * under the terms of version 2 of the GNU General Public License as
18 * published by the Free Software Foundation.
20 * In either case, Lustre is distributed in the hope that it will be
21 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
22 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * license text for more details.
25 * For testing and management it is treated as an obd_device,
26 * although * it does not export a full OBD method table (the
27 * requests are coming * in over the wire, so object target modules
28 * do not have a full * method table.)
33 # define EXPORT_SYMTAB
35 #define DEBUG_SUBSYSTEM S_OSC
38 # include <libcfs/libcfs.h>
39 #else /* __KERNEL__ */
40 # include <liblustre.h>
43 #include <lustre_dlm.h>
44 #include <libcfs/kp30.h>
45 #include <lustre_net.h>
46 #include <lustre/lustre_user.h>
54 #include <lustre_ha.h>
55 #include <lprocfs_status.h>
56 #include <lustre_log.h>
57 #include <lustre_debug.h>
58 #include <lustre_param.h>
59 #include "osc_internal.h"
61 static quota_interface_t *quota_interface = NULL;
62 extern quota_interface_t osc_quota_interface;
64 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
66 /* Pack OSC object metadata for disk storage (LE byte order). */
67 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
68 struct lov_stripe_md *lsm)
73 lmm_size = sizeof(**lmmp);
78 OBD_FREE(*lmmp, lmm_size);
84 OBD_ALLOC(*lmmp, lmm_size);
90 LASSERT(lsm->lsm_object_id);
91 LASSERT(lsm->lsm_object_gr);
92 (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
93 (*lmmp)->lmm_object_gr = cpu_to_le64(lsm->lsm_object_gr);
99 /* Unpack OSC object metadata from disk storage (LE byte order). */
100 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
101 struct lov_mds_md *lmm, int lmm_bytes)
107 if (lmm_bytes < sizeof (*lmm)) {
108 CERROR("lov_mds_md too small: %d, need %d\n",
109 lmm_bytes, (int)sizeof(*lmm));
112 /* XXX LOV_MAGIC etc check? */
114 if (lmm->lmm_object_id == 0) {
115 CERROR("lov_mds_md: zero lmm_object_id\n");
120 lsm_size = lov_stripe_md_size(1);
124 if (*lsmp != NULL && lmm == NULL) {
125 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
126 OBD_FREE(*lsmp, lsm_size);
132 OBD_ALLOC(*lsmp, lsm_size);
135 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
136 if ((*lsmp)->lsm_oinfo[0] == NULL) {
137 OBD_FREE(*lsmp, lsm_size);
140 loi_init((*lsmp)->lsm_oinfo[0]);
144 /* XXX zero *lsmp? */
145 (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
146 (*lsmp)->lsm_object_gr = le64_to_cpu (lmm->lmm_object_gr);
147 LASSERT((*lsmp)->lsm_object_id);
148 LASSERT((*lsmp)->lsm_object_gr);
151 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
156 static inline void osc_pack_capa(struct ptlrpc_request *req, int offset,
157 struct ost_body *body, void *capa)
159 struct obd_capa *oc = (struct obd_capa *)capa;
160 struct lustre_capa *c;
165 c = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*c));
168 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
169 DEBUG_CAPA(D_SEC, c, "pack");
172 static inline void osc_pack_req_body(struct ptlrpc_request *req, int offset,
173 struct obd_info *oinfo)
175 struct ost_body *body;
177 body = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*body));
178 body->oa = *oinfo->oi_oa;
179 osc_pack_capa(req, offset + 1, body, oinfo->oi_capa);
182 static int osc_getattr_interpret(struct ptlrpc_request *req,
183 struct osc_async_args *aa, int rc)
185 struct ost_body *body;
191 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
192 lustre_swab_ost_body);
194 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
195 memcpy(aa->aa_oi->oi_oa, &body->oa, sizeof(*aa->aa_oi->oi_oa));
197 /* This should really be sent by the OST */
198 aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
199 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
201 CERROR("can't unpack ost_body\n");
203 aa->aa_oi->oi_oa->o_valid = 0;
206 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
210 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
211 struct ptlrpc_request_set *set)
213 struct ptlrpc_request *req;
214 struct ost_body *body;
215 int size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
216 struct osc_async_args *aa;
219 size[REQ_REC_OFF + 1] = oinfo->oi_capa ? sizeof(struct lustre_capa) : 0;
220 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
221 OST_GETATTR, 3, size,NULL);
225 osc_pack_req_body(req, REQ_REC_OFF, oinfo);
227 ptlrpc_req_set_repsize(req, 2, size);
228 req->rq_interpret_reply = osc_getattr_interpret;
230 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
231 aa = (struct osc_async_args *)&req->rq_async_args;
234 ptlrpc_set_add_req(set, req);
238 static int osc_getattr(struct obd_export *exp, struct obd_info *oinfo)
240 struct ptlrpc_request *req;
241 struct ost_body *body;
242 int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
245 size[REQ_REC_OFF + 1] = oinfo->oi_capa ? sizeof(struct lustre_capa) : 0;
246 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
247 OST_GETATTR, 3, size, NULL);
251 osc_pack_req_body(req, REQ_REC_OFF, oinfo);
253 ptlrpc_req_set_repsize(req, 2, size);
255 rc = ptlrpc_queue_wait(req);
257 CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
261 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
262 lustre_swab_ost_body);
264 CERROR ("can't unpack ost_body\n");
265 GOTO (out, rc = -EPROTO);
268 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
269 *oinfo->oi_oa = body->oa;
271 /* This should really be sent by the OST */
272 oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
273 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
277 ptlrpc_req_finished(req);
281 static int osc_setattr(struct obd_export *exp, struct obd_info *oinfo,
282 struct obd_trans_info *oti)
284 struct ptlrpc_request *req;
285 struct ost_body *body;
286 int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
289 LASSERT(!(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP) ||
290 oinfo->oi_oa->o_gr > 0);
291 size[REQ_REC_OFF + 1] = oinfo->oi_capa ? sizeof(struct lustre_capa) : 0;
292 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
293 OST_SETATTR, 3, size, NULL);
297 osc_pack_req_body(req, REQ_REC_OFF, oinfo);
299 ptlrpc_req_set_repsize(req, 2, size);
301 rc = ptlrpc_queue_wait(req);
305 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
306 lustre_swab_ost_body);
308 GOTO(out, rc = -EPROTO);
310 *oinfo->oi_oa = body->oa;
314 ptlrpc_req_finished(req);
318 static int osc_setattr_interpret(struct ptlrpc_request *req,
319 struct osc_async_args *aa, int rc)
321 struct ost_body *body;
327 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
328 lustre_swab_ost_body);
330 CERROR("can't unpack ost_body\n");
331 GOTO(out, rc = -EPROTO);
334 *aa->aa_oi->oi_oa = body->oa;
336 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
340 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
341 struct obd_trans_info *oti,
342 struct ptlrpc_request_set *rqset)
344 struct ptlrpc_request *req;
345 int size[3] = { sizeof(struct ptlrpc_body), sizeof(struct ost_body) };
346 struct osc_async_args *aa;
349 size[REQ_REC_OFF + 1] = oinfo->oi_capa ? sizeof(struct lustre_capa) : 0;
350 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
351 OST_SETATTR, 3, size, NULL);
355 osc_pack_req_body(req, REQ_REC_OFF, oinfo);
356 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
358 *obdo_logcookie(oinfo->oi_oa) = *oti->oti_logcookies;
361 ptlrpc_req_set_repsize(req, 2, size);
362 /* do mds to ost setattr asynchronouly */
364 /* Do not wait for response. */
365 ptlrpcd_add_req(req);
367 req->rq_interpret_reply = osc_setattr_interpret;
369 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
370 aa = (struct osc_async_args *)&req->rq_async_args;
373 ptlrpc_set_add_req(rqset, req);
379 int osc_real_create(struct obd_export *exp, struct obdo *oa,
380 struct lov_stripe_md **ea, struct obd_trans_info *oti)
382 struct ptlrpc_request *req;
383 struct ost_body *body;
384 struct lov_stripe_md *lsm;
385 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
393 rc = obd_alloc_memmd(exp, &lsm);
398 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
399 OST_CREATE, 2, size, NULL);
401 GOTO(out, rc = -ENOMEM);
403 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
406 ptlrpc_req_set_repsize(req, 2, size);
407 if (oa->o_valid & OBD_MD_FLINLINE) {
408 LASSERT((oa->o_valid & OBD_MD_FLFLAGS) &&
409 oa->o_flags == OBD_FL_DELORPHAN);
411 "delorphan from OST integration");
412 /* Don't resend the delorphan req */
413 req->rq_no_resend = req->rq_no_delay = 1;
416 rc = ptlrpc_queue_wait(req);
420 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
421 lustre_swab_ost_body);
423 CERROR ("can't unpack ost_body\n");
424 GOTO (out_req, rc = -EPROTO);
429 /* This should really be sent by the OST */
430 oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
431 oa->o_valid |= OBD_MD_FLBLKSZ;
433 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
434 * have valid lsm_oinfo data structs, so don't go touching that.
435 * This needs to be fixed in a big way.
437 lsm->lsm_object_id = oa->o_id;
438 lsm->lsm_object_gr = oa->o_gr;
442 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
444 if (oa->o_valid & OBD_MD_FLCOOKIE) {
445 if (!oti->oti_logcookies)
446 oti_alloc_cookies(oti, 1);
447 *oti->oti_logcookies = *obdo_logcookie(oa);
451 CDEBUG(D_HA, "transno: "LPD64"\n",
452 lustre_msg_get_transno(req->rq_repmsg));
454 ptlrpc_req_finished(req);
457 obd_free_memmd(exp, &lsm);
461 static int osc_punch_interpret(struct ptlrpc_request *req,
462 struct osc_async_args *aa, int rc)
464 struct ost_body *body;
470 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof (*body),
471 lustre_swab_ost_body);
473 CERROR ("can't unpack ost_body\n");
474 GOTO(out, rc = -EPROTO);
477 *aa->aa_oi->oi_oa = body->oa;
479 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
483 static int osc_punch(struct obd_export *exp, struct obd_info *oinfo,
484 struct obd_trans_info *oti,
485 struct ptlrpc_request_set *rqset)
487 struct ptlrpc_request *req;
488 struct osc_async_args *aa;
489 struct ost_body *body;
490 int size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
498 size[REQ_REC_OFF + 1] = oinfo->oi_capa? sizeof(struct lustre_capa) : 0;
499 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
500 OST_PUNCH, 3, size, NULL);
504 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
506 osc_pack_req_body(req, REQ_REC_OFF, oinfo);
507 /* overload the size and blocks fields in the oa with start/end */
508 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
509 body->oa.o_size = oinfo->oi_policy.l_extent.start;
510 body->oa.o_blocks = oinfo->oi_policy.l_extent.end;
511 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
513 ptlrpc_req_set_repsize(req, 2, size);
515 req->rq_interpret_reply = osc_punch_interpret;
516 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
517 aa = (struct osc_async_args *)&req->rq_async_args;
519 ptlrpc_set_add_req(rqset, req);
524 static int osc_sync(struct obd_export *exp, struct obdo *oa,
525 struct lov_stripe_md *md, obd_size start, obd_size end,
528 struct ptlrpc_request *req;
529 struct ost_body *body;
530 int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
538 size[REQ_REC_OFF + 1] = capa ? sizeof(struct lustre_capa) : 0;
540 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
541 OST_SYNC, 3, size, NULL);
545 /* overload the size and blocks fields in the oa with start/end */
546 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
548 body->oa.o_size = start;
549 body->oa.o_blocks = end;
550 body->oa.o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
552 osc_pack_capa(req, REQ_REC_OFF + 1, body, capa);
554 ptlrpc_req_set_repsize(req, 2, size);
556 rc = ptlrpc_queue_wait(req);
560 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
561 lustre_swab_ost_body);
563 CERROR ("can't unpack ost_body\n");
564 GOTO (out, rc = -EPROTO);
571 ptlrpc_req_finished(req);
575 /* Find and cancel locally locks matched by @mode in the resource found by
576 * @objid. Found locks are added into @cancel list. Returns the amount of
577 * locks added to @cancels list. */
578 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
579 struct list_head *cancels, ldlm_mode_t mode,
582 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
583 struct ldlm_res_id res_id = { .name = { oa->o_id, 0, oa->o_gr, 0 } };
584 struct ldlm_resource *res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
591 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
592 lock_flags, 0, NULL);
593 ldlm_resource_putref(res);
597 /* Destroy requests can be async always on the client, and we don't even really
598 * care about the return code since the client cannot do anything at all about
600 * When the MDS is unlinking a filename, it saves the file objects into a
601 * recovery llog, and these object records are cancelled when the OST reports
602 * they were destroyed and sync'd to disk (i.e. transaction committed).
603 * If the client dies, or the OST is down when the object should be destroyed,
604 * the records are not cancelled, and when the OST reconnects to the MDS next,
605 * it will retrieve the llog unlink logs and then sends the log cancellation
606 * cookies to the MDS after committing destroy transactions. */
607 static int osc_destroy(struct obd_export *exp, struct obdo *oa,
608 struct lov_stripe_md *ea, struct obd_trans_info *oti,
609 struct obd_export *md_export)
611 CFS_LIST_HEAD(cancels);
612 struct ptlrpc_request *req;
613 struct ost_body *body;
614 int size[3] = { sizeof(struct ptlrpc_body), sizeof(*body), 0 };
615 int count, bufcount = 2;
623 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
624 LDLM_FL_DISCARD_DATA);
625 if (exp_connect_cancelset(exp) && count) {
627 size[REQ_REC_OFF + 1] = ldlm_request_bufsize(count,
630 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
631 OST_DESTROY, bufcount, size, NULL);
632 if (exp_connect_cancelset(exp) && req)
633 ldlm_cli_cancel_list(&cancels, count, req, REQ_REC_OFF + 1, 0);
635 ldlm_lock_list_put(&cancels, l_bl_ast, count);
640 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
642 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
643 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
644 memcpy(obdo_logcookie(oa), oti->oti_logcookies,
645 sizeof(*oti->oti_logcookies));
648 ptlrpc_req_set_repsize(req, 2, size);
650 ptlrpcd_add_req(req);
654 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
657 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
659 LASSERT(!(oa->o_valid & bits));
662 client_obd_list_lock(&cli->cl_loi_list_lock);
663 oa->o_dirty = cli->cl_dirty;
664 if (cli->cl_dirty > cli->cl_dirty_max) {
665 CERROR("dirty %lu > dirty_max %lu\n",
666 cli->cl_dirty, cli->cl_dirty_max);
668 } else if (atomic_read(&obd_dirty_pages) > obd_max_dirty_pages) {
669 CERROR("dirty %d > system dirty_max %d\n",
670 atomic_read(&obd_dirty_pages), obd_max_dirty_pages);
672 } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
673 CERROR("dirty %lu - dirty_max %lu too big???\n",
674 cli->cl_dirty, cli->cl_dirty_max);
677 long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
678 (cli->cl_max_rpcs_in_flight + 1);
679 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
681 oa->o_grant = cli->cl_avail_grant;
682 oa->o_dropped = cli->cl_lost_grant;
683 cli->cl_lost_grant = 0;
684 client_obd_list_unlock(&cli->cl_loi_list_lock);
685 CDEBUG(D_CACHE,"dirty: "LPU64" undirty: %u dropped %u grant: "LPU64"\n",
686 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
689 /* caller must hold loi_list_lock */
690 static void osc_consume_write_grant(struct client_obd *cli,
691 struct brw_page *pga)
693 atomic_inc(&obd_dirty_pages);
694 cli->cl_dirty += CFS_PAGE_SIZE;
695 cli->cl_avail_grant -= CFS_PAGE_SIZE;
696 pga->flag |= OBD_BRW_FROM_GRANT;
697 CDEBUG(D_CACHE, "using %lu grant credits for brw %p page %p\n",
698 CFS_PAGE_SIZE, pga, pga->pg);
699 LASSERT(cli->cl_avail_grant >= 0);
702 /* the companion to osc_consume_write_grant, called when a brw has completed.
703 * must be called with the loi lock held. */
704 static void osc_release_write_grant(struct client_obd *cli,
705 struct brw_page *pga, int sent)
707 int blocksize = cli->cl_import->imp_obd->obd_osfs.os_bsize ? : 4096;
710 if (!(pga->flag & OBD_BRW_FROM_GRANT)) {
715 pga->flag &= ~OBD_BRW_FROM_GRANT;
716 atomic_dec(&obd_dirty_pages);
717 cli->cl_dirty -= CFS_PAGE_SIZE;
719 cli->cl_lost_grant += CFS_PAGE_SIZE;
720 CDEBUG(D_CACHE, "lost grant: %lu avail grant: %lu dirty: %lu\n",
721 cli->cl_lost_grant, cli->cl_avail_grant, cli->cl_dirty);
722 } else if (CFS_PAGE_SIZE != blocksize && pga->count != CFS_PAGE_SIZE) {
723 /* For short writes we shouldn't count parts of pages that
724 * span a whole block on the OST side, or our accounting goes
725 * wrong. Should match the code in filter_grant_check. */
726 int offset = pga->off & ~CFS_PAGE_MASK;
727 int count = pga->count + (offset & (blocksize - 1));
728 int end = (offset + pga->count) & (blocksize - 1);
730 count += blocksize - end;
732 cli->cl_lost_grant += CFS_PAGE_SIZE - count;
733 CDEBUG(D_CACHE, "lost %lu grant: %lu avail: %lu dirty: %lu\n",
734 CFS_PAGE_SIZE - count, cli->cl_lost_grant,
735 cli->cl_avail_grant, cli->cl_dirty);
741 static unsigned long rpcs_in_flight(struct client_obd *cli)
743 return cli->cl_r_in_flight + cli->cl_w_in_flight;
746 /* caller must hold loi_list_lock */
747 void osc_wake_cache_waiters(struct client_obd *cli)
749 struct list_head *l, *tmp;
750 struct osc_cache_waiter *ocw;
753 list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
754 /* if we can't dirty more, we must wait until some is written */
755 if ((cli->cl_dirty + CFS_PAGE_SIZE > cli->cl_dirty_max) ||
756 (atomic_read(&obd_dirty_pages) + 1 > obd_max_dirty_pages)) {
757 CDEBUG(D_CACHE, "no dirty room: dirty: %ld "
758 "osc max %ld, sys max %d\n", cli->cl_dirty,
759 cli->cl_dirty_max, obd_max_dirty_pages);
763 /* if still dirty cache but no grant wait for pending RPCs that
764 * may yet return us some grant before doing sync writes */
765 if (cli->cl_w_in_flight && cli->cl_avail_grant < CFS_PAGE_SIZE) {
766 CDEBUG(D_CACHE, "%u BRW writes in flight, no grant\n",
767 cli->cl_w_in_flight);
771 ocw = list_entry(l, struct osc_cache_waiter, ocw_entry);
772 list_del_init(&ocw->ocw_entry);
773 if (cli->cl_avail_grant < CFS_PAGE_SIZE) {
774 /* no more RPCs in flight to return grant, do sync IO */
775 ocw->ocw_rc = -EDQUOT;
776 CDEBUG(D_INODE, "wake oap %p for sync\n", ocw->ocw_oap);
778 osc_consume_write_grant(cli,
779 &ocw->ocw_oap->oap_brw_page);
782 cfs_waitq_signal(&ocw->ocw_waitq);
788 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
790 client_obd_list_lock(&cli->cl_loi_list_lock);
791 cli->cl_avail_grant = ocd->ocd_grant;
792 client_obd_list_unlock(&cli->cl_loi_list_lock);
794 CDEBUG(D_CACHE, "setting cl_avail_grant: %ld cl_lost_grant: %ld\n",
795 cli->cl_avail_grant, cli->cl_lost_grant);
796 LASSERT(cli->cl_avail_grant >= 0);
799 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
801 client_obd_list_lock(&cli->cl_loi_list_lock);
802 CDEBUG(D_CACHE, "got "LPU64" extra grant\n", body->oa.o_grant);
803 if (body->oa.o_valid & OBD_MD_FLGRANT)
804 cli->cl_avail_grant += body->oa.o_grant;
805 /* waiters are woken in brw_interpret_oap */
806 client_obd_list_unlock(&cli->cl_loi_list_lock);
809 /* We assume that the reason this OSC got a short read is because it read
810 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
811 * via the LOV, and it _knows_ it's reading inside the file, it's just that
812 * this stripe never got written at or beyond this stripe offset yet. */
813 static void handle_short_read(int nob_read, obd_count page_count,
814 struct brw_page **pga)
819 /* skip bytes read OK */
820 while (nob_read > 0) {
821 LASSERT (page_count > 0);
823 if (pga[i]->count > nob_read) {
824 /* EOF inside this page */
825 ptr = cfs_kmap(pga[i]->pg) +
826 (pga[i]->off & ~CFS_PAGE_MASK);
827 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
828 cfs_kunmap(pga[i]->pg);
834 nob_read -= pga[i]->count;
839 /* zero remaining pages */
840 while (page_count-- > 0) {
841 ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
842 memset(ptr, 0, pga[i]->count);
843 cfs_kunmap(pga[i]->pg);
848 static int check_write_rcs(struct ptlrpc_request *req,
849 int requested_nob, int niocount,
850 obd_count page_count, struct brw_page **pga)
854 /* return error if any niobuf was in error */
855 remote_rcs = lustre_swab_repbuf(req, REQ_REC_OFF + 1,
856 sizeof(*remote_rcs) * niocount, NULL);
857 if (remote_rcs == NULL) {
858 CERROR("Missing/short RC vector on BRW_WRITE reply\n");
861 if (lustre_msg_swabbed(req->rq_repmsg))
862 for (i = 0; i < niocount; i++)
863 __swab32s(&remote_rcs[i]);
865 for (i = 0; i < niocount; i++) {
866 if (remote_rcs[i] < 0)
867 return(remote_rcs[i]);
869 if (remote_rcs[i] != 0) {
870 CERROR("rc[%d] invalid (%d) req %p\n",
871 i, remote_rcs[i], req);
876 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
877 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
878 requested_nob, req->rq_bulk->bd_nob_transferred);
885 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
887 if (p1->flag != p2->flag) {
888 unsigned mask = ~OBD_BRW_FROM_GRANT;
890 /* warn if we try to combine flags that we don't know to be
892 if ((p1->flag & mask) != (p2->flag & mask))
893 CERROR("is it ok to have flags 0x%x and 0x%x in the "
894 "same brw?\n", p1->flag, p2->flag);
898 return (p1->off + p1->count == p2->off);
901 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
902 struct brw_page **pga, int opc)
907 LASSERT (pg_count > 0);
908 while (nob > 0 && pg_count > 0) {
909 char *ptr = cfs_kmap(pga[i]->pg);
910 int off = pga[i]->off & ~CFS_PAGE_MASK;
911 int count = pga[i]->count > nob ? nob : pga[i]->count;
913 /* corrupt the data before we compute the checksum, to
914 * simulate an OST->client data error */
915 if (i == 0 && opc == OST_READ &&
916 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE))
917 memcpy(ptr + off, "bad1", min(4, nob));
918 cksum = crc32_le(cksum, ptr + off, count);
919 cfs_kunmap(pga[i]->pg);
920 LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
923 nob -= pga[i]->count;
927 /* For sending we only compute the wrong checksum instead
928 * of corrupting the data so it is still correct on a redo */
929 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
935 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
936 struct lov_stripe_md *lsm, obd_count page_count,
937 struct brw_page **pga,
938 struct ptlrpc_request **reqp,
939 struct obd_capa *ocapa)
941 struct ptlrpc_request *req;
942 struct ptlrpc_bulk_desc *desc;
943 struct ost_body *body;
944 struct obd_ioobj *ioobj;
945 struct niobuf_remote *niobuf;
946 int size[5] = { sizeof(struct ptlrpc_body), sizeof(*body) };
947 int niocount, i, requested_nob, opc, rc;
948 struct ptlrpc_request_pool *pool;
949 struct lustre_capa *capa;
950 struct osc_brw_async_args *aa;
953 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
954 RETURN(-ENOMEM); /* Recoverable */
955 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
956 RETURN(-EINVAL); /* Fatal */
958 if ((cmd & OBD_BRW_WRITE) != 0) {
960 pool = cli->cl_import->imp_rq_pool;
966 for (niocount = i = 1; i < page_count; i++) {
967 if (!can_merge_pages(pga[i - 1], pga[i]))
971 size[REQ_REC_OFF + 1] = sizeof(*ioobj);
972 size[REQ_REC_OFF + 2] = niocount * sizeof(*niobuf);
974 size[REQ_REC_OFF + 3] = sizeof(*capa);
976 req = ptlrpc_prep_req_pool(cli->cl_import, LUSTRE_OST_VERSION, opc, 5,
977 size, NULL, pool, NULL);
981 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
983 if (opc == OST_WRITE)
984 desc = ptlrpc_prep_bulk_imp (req, page_count,
985 BULK_GET_SOURCE, OST_BULK_PORTAL);
987 desc = ptlrpc_prep_bulk_imp (req, page_count,
988 BULK_PUT_SINK, OST_BULK_PORTAL);
990 GOTO(out, rc = -ENOMEM);
991 /* NB request now owns desc and will free it when it gets freed */
993 body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
994 ioobj = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 1, sizeof(*ioobj));
995 niobuf = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
996 niocount * sizeof(*niobuf));
1000 obdo_to_ioobj(oa, ioobj);
1001 ioobj->ioo_bufcnt = niocount;
1003 capa = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 3,
1005 capa_cpy(capa, ocapa);
1006 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
1009 LASSERT (page_count > 0);
1010 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1011 struct brw_page *pg = pga[i];
1012 struct brw_page *pg_prev = pga[i - 1];
1014 LASSERT(pg->count > 0);
1015 LASSERTF((pg->off & ~CFS_PAGE_MASK) + pg->count <= CFS_PAGE_SIZE,
1016 "i: %d pg: %p off: "LPU64", count: %u\n", i, pg,
1017 pg->off, pg->count);
1019 LASSERTF(i == 0 || pg->off > pg_prev->off,
1020 "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
1021 " prev_pg %p [pri %lu ind %lu] off "LPU64"\n",
1023 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1024 pg_prev->pg, page_private(pg_prev->pg),
1025 pg_prev->pg->index, pg_prev->off);
1027 LASSERTF(i == 0 || pg->off > pg_prev->off,
1028 "i %d p_c %u\n", i, page_count);
1030 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1031 (pg->flag & OBD_BRW_SRVLOCK));
1033 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~CFS_PAGE_MASK,
1035 requested_nob += pg->count;
1037 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1039 niobuf->len += pg->count;
1041 niobuf->offset = pg->off;
1042 niobuf->len = pg->count;
1043 niobuf->flags = pg->flag;
1047 LASSERT((void *)(niobuf - niocount) ==
1048 lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2,
1049 niocount * sizeof(*niobuf)));
1050 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1052 /* size[REQ_REC_OFF] still sizeof (*body) */
1053 if (opc == OST_WRITE) {
1054 if (unlikely(cli->cl_checksum)) {
1055 body->oa.o_valid |= OBD_MD_FLCKSUM;
1056 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1059 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1061 /* save this in 'oa', too, for later checking */
1062 oa->o_valid |= OBD_MD_FLCKSUM;
1064 /* clear out the checksum flag, in case this is a
1065 * resend but cl_checksum is no longer set. b=11238 */
1066 oa->o_valid &= ~OBD_MD_FLCKSUM;
1068 oa->o_cksum = body->oa.o_cksum;
1069 /* 1 RC per niobuf */
1070 size[REPLY_REC_OFF + 1] = sizeof(__u32) * niocount;
1071 ptlrpc_req_set_repsize(req, 3, size);
1073 if (unlikely(cli->cl_checksum))
1074 body->oa.o_valid |= OBD_MD_FLCKSUM;
1075 /* 1 RC for the whole I/O */
1076 ptlrpc_req_set_repsize(req, 2, size);
1079 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1080 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1082 aa->aa_requested_nob = requested_nob;
1083 aa->aa_nio_count = niocount;
1084 aa->aa_page_count = page_count;
1088 INIT_LIST_HEAD(&aa->aa_oaps);
1094 ptlrpc_req_finished (req);
1098 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1099 __u32 client_cksum, __u32 server_cksum,
1100 int nob, obd_count page_count,
1101 struct brw_page **pga)
1106 if (server_cksum == client_cksum) {
1107 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1111 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE);
1113 if (new_cksum == server_cksum)
1114 msg = "changed on the client after we checksummed it - "
1115 "likely false positive due to mmap IO (bug 11742)";
1116 else if (new_cksum == client_cksum)
1117 msg = "changed in transit before arrival at OST";
1119 msg = "changed in transit AND doesn't match the original - "
1120 "likely false positive due to mmap IO (bug 11742)";
1122 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inum "
1123 LPU64"/"LPU64" object "LPU64"/"LPU64" extent "
1124 "["LPU64"-"LPU64"]\n",
1125 msg, libcfs_nid2str(peer->nid),
1126 oa->o_valid & OBD_MD_FLFID ? oa->o_fid : (__u64)0,
1127 oa->o_valid & OBD_MD_FLFID ? oa->o_generation :
1130 oa->o_valid & OBD_MD_FLGROUP ? oa->o_gr : (__u64)0,
1132 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1133 CERROR("original client csum %x, server csum %x, client csum now %x\n",
1134 client_cksum, server_cksum, new_cksum);
1138 /* Note rc enters this function as number of bytes transferred */
1139 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1141 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1142 const lnet_process_id_t *peer =
1143 &req->rq_import->imp_connection->c_peer;
1144 struct client_obd *cli = aa->aa_cli;
1145 struct ost_body *body;
1146 __u32 client_cksum = 0;
1149 if (rc < 0 && rc != -EDQUOT)
1152 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1153 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1154 lustre_swab_ost_body);
1156 CERROR ("Can't unpack body\n");
1160 /* set/clear over quota flag for a uid/gid */
1161 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1162 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA))
1163 lquota_setdq(quota_interface, cli, body->oa.o_uid,
1164 body->oa.o_gid, body->oa.o_valid,
1170 if (unlikely(aa->aa_oa->o_valid & OBD_MD_FLCKSUM))
1171 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1173 osc_update_grant(cli, body);
1175 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1177 CERROR ("Unexpected +ve rc %d\n", rc);
1180 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1182 if (unlikely((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) &&
1184 check_write_checksum(&body->oa, peer, client_cksum,
1186 aa->aa_requested_nob,
1191 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1194 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1195 aa->aa_page_count, aa->aa_ppga);
1199 /* The rest of this function executes only for OST_READs */
1200 if (rc > aa->aa_requested_nob) {
1201 CERROR("Unexpected rc %d (%d requested)\n", rc,
1202 aa->aa_requested_nob);
1206 if (rc != req->rq_bulk->bd_nob_transferred) {
1207 CERROR ("Unexpected rc %d (%d transferred)\n",
1208 rc, req->rq_bulk->bd_nob_transferred);
1212 if (rc < aa->aa_requested_nob)
1213 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1215 if (sptlrpc_cli_unwrap_bulk_read(req, rc, aa->aa_page_count,
1217 GOTO(out, rc = -EAGAIN);
1219 if (unlikely(body->oa.o_valid & OBD_MD_FLCKSUM)) {
1220 static int cksum_counter;
1221 __u32 server_cksum = body->oa.o_cksum;
1225 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1226 aa->aa_ppga, OST_READ);
1228 if (peer->nid == req->rq_bulk->bd_sender) {
1232 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1235 if (server_cksum == ~0 && rc > 0) {
1236 CERROR("Protocol error: server %s set the 'checksum' "
1237 "bit, but didn't send a checksum. Not fatal, "
1238 "but please tell CFS.\n",
1239 libcfs_nid2str(peer->nid));
1240 } else if (server_cksum != client_cksum) {
1241 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1242 "%s%s%s inum "LPU64"/"LPU64" object "
1243 LPU64"/"LPU64" extent "
1244 "["LPU64"-"LPU64"]\n",
1245 req->rq_import->imp_obd->obd_name,
1246 libcfs_nid2str(peer->nid),
1248 body->oa.o_valid & OBD_MD_FLFID ?
1249 body->oa.o_fid : (__u64)0,
1250 body->oa.o_valid & OBD_MD_FLFID ?
1251 body->oa.o_generation :(__u64)0,
1253 body->oa.o_valid & OBD_MD_FLGROUP ?
1254 body->oa.o_gr : (__u64)0,
1255 aa->aa_ppga[0]->off,
1256 aa->aa_ppga[aa->aa_page_count-1]->off +
1257 aa->aa_ppga[aa->aa_page_count-1]->count -
1259 CERROR("client %x, server %x\n",
1260 client_cksum, server_cksum);
1262 aa->aa_oa->o_cksum = client_cksum;
1266 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1269 } else if (unlikely(client_cksum)) {
1270 static int cksum_missed;
1273 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1274 CERROR("Checksum %u requested from %s but not sent\n",
1275 cksum_missed, libcfs_nid2str(peer->nid));
1281 *aa->aa_oa = body->oa;
1286 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1287 struct lov_stripe_md *lsm,
1288 obd_count page_count, struct brw_page **pga,
1289 struct obd_capa *ocapa)
1291 struct ptlrpc_request *req;
1295 struct l_wait_info lwi;
1299 cfs_waitq_init(&waitq);
1302 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1303 page_count, pga, &req, ocapa);
1307 rc = ptlrpc_queue_wait(req);
1309 if (rc == -ETIMEDOUT && req->rq_resend) {
1310 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1311 ptlrpc_req_finished(req);
1315 rc = osc_brw_fini_request(req, rc);
1317 ptlrpc_req_finished(req);
1318 if (osc_recoverable_error(rc)) {
1320 if (!osc_should_resend(resends, &exp->exp_obd->u.cli)) {
1321 CERROR("too many resend retries, returning error\n");
1325 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1326 l_wait_event(waitq, 0, &lwi);
1334 int osc_brw_redo_request(struct ptlrpc_request *request,
1335 struct osc_brw_async_args *aa)
1337 struct ptlrpc_request *new_req;
1338 struct ptlrpc_request_set *set = request->rq_set;
1339 struct osc_brw_async_args *new_aa;
1340 struct osc_async_page *oap;
1344 if (!osc_should_resend(aa->aa_resends, aa->aa_cli)) {
1345 CERROR("too many resend retries, returning error\n");
1349 DEBUG_REQ(D_ERROR, request, "redo for recoverable error");
1351 body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1352 if (body->oa.o_valid & OBD_MD_FLOSSCAPA)
1353 ocapa = lustre_unpack_capa(request->rq_reqmsg,
1356 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1357 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1358 aa->aa_cli, aa->aa_oa,
1359 NULL /* lsm unused by osc currently */,
1360 aa->aa_page_count, aa->aa_ppga,
1361 &new_req, NULL /* ocapa */);
1365 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1367 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1368 if (oap->oap_request != NULL) {
1369 LASSERTF(request == oap->oap_request,
1370 "request %p != oap_request %p\n",
1371 request, oap->oap_request);
1372 if (oap->oap_interrupted) {
1373 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1374 ptlrpc_req_finished(new_req);
1379 /* New request takes over pga and oaps from old request.
1380 * Note that copying a list_head doesn't work, need to move it... */
1382 new_req->rq_interpret_reply = request->rq_interpret_reply;
1383 new_req->rq_async_args = request->rq_async_args;
1384 new_req->rq_sent = CURRENT_SECONDS + aa->aa_resends;
1386 new_aa = (struct osc_brw_async_args *)&new_req->rq_async_args;
1388 INIT_LIST_HEAD(&new_aa->aa_oaps);
1389 list_splice(&aa->aa_oaps, &new_aa->aa_oaps);
1390 INIT_LIST_HEAD(&aa->aa_oaps);
1392 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1393 if (oap->oap_request) {
1394 ptlrpc_req_finished(oap->oap_request);
1395 oap->oap_request = ptlrpc_request_addref(new_req);
1399 /* use ptlrpc_set_add_req is safe because interpret functions work
1400 * in check_set context. only one way exist with access to request
1401 * from different thread got -EINTR - this way protected with
1402 * cl_loi_list_lock */
1403 ptlrpc_set_add_req(set, new_req);
1405 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1407 DEBUG_REQ(D_INFO, new_req, "new request");
1411 static int brw_interpret(struct ptlrpc_request *req, void *data, int rc)
1413 struct osc_brw_async_args *aa = data;
1418 rc = osc_brw_fini_request(req, rc);
1419 if (osc_recoverable_error(rc)) {
1420 rc = osc_brw_redo_request(req, aa);
1424 if ((rc >= 0) && req->rq_set && req->rq_set->set_countp)
1425 atomic_add(nob, (atomic_t *)req->rq_set->set_countp);
1427 client_obd_list_lock(&aa->aa_cli->cl_loi_list_lock);
1428 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1429 aa->aa_cli->cl_w_in_flight--;
1431 aa->aa_cli->cl_r_in_flight--;
1432 for (i = 0; i < aa->aa_page_count; i++)
1433 osc_release_write_grant(aa->aa_cli, aa->aa_ppga[i], 1);
1434 client_obd_list_unlock(&aa->aa_cli->cl_loi_list_lock);
1436 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1441 static int async_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1442 struct lov_stripe_md *lsm, obd_count page_count,
1443 struct brw_page **pga, struct ptlrpc_request_set *set,
1444 struct obd_capa *ocapa)
1446 struct ptlrpc_request *req;
1447 struct client_obd *cli = &exp->exp_obd->u.cli;
1449 struct osc_brw_async_args *aa;
1452 /* Consume write credits even if doing a sync write -
1453 * otherwise we may run out of space on OST due to grant. */
1454 if (cmd == OBD_BRW_WRITE) {
1455 spin_lock(&cli->cl_loi_list_lock);
1456 for (i = 0; i < page_count; i++) {
1457 if (cli->cl_avail_grant >= CFS_PAGE_SIZE)
1458 osc_consume_write_grant(cli, pga[i]);
1460 spin_unlock(&cli->cl_loi_list_lock);
1463 rc = osc_brw_prep_request(cmd, cli, oa, lsm, page_count, pga,
1466 aa = (struct osc_brw_async_args *)&req->rq_async_args;
1467 if (cmd == OBD_BRW_READ) {
1468 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
1469 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
1470 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
1472 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
1473 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
1474 cli->cl_w_in_flight);
1475 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
1479 req->rq_interpret_reply = brw_interpret;
1480 ptlrpc_set_add_req(set, req);
1481 client_obd_list_lock(&cli->cl_loi_list_lock);
1482 if (cmd == OBD_BRW_READ)
1483 cli->cl_r_in_flight++;
1485 cli->cl_w_in_flight++;
1486 client_obd_list_unlock(&cli->cl_loi_list_lock);
1487 } else if (cmd == OBD_BRW_WRITE) {
1488 client_obd_list_lock(&cli->cl_loi_list_lock);
1489 for (i = 0; i < page_count; i++)
1490 osc_release_write_grant(cli, pga[i], 0);
1491 client_obd_list_unlock(&cli->cl_loi_list_lock);
1497 * ugh, we want disk allocation on the target to happen in offset order. we'll
1498 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1499 * fine for our small page arrays and doesn't require allocation. its an
1500 * insertion sort that swaps elements that are strides apart, shrinking the
1501 * stride down until its '1' and the array is sorted.
1503 static void sort_brw_pages(struct brw_page **array, int num)
1506 struct brw_page *tmp;
1510 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1515 for (i = stride ; i < num ; i++) {
1518 while (j >= stride && array[j - stride]->off > tmp->off) {
1519 array[j] = array[j - stride];
1524 } while (stride > 1);
1527 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1533 LASSERT (pages > 0);
1534 offset = pg[i]->off & ~CFS_PAGE_MASK;
1538 if (pages == 0) /* that's all */
1541 if (offset + pg[i]->count < CFS_PAGE_SIZE)
1542 return count; /* doesn't end on page boundary */
1545 offset = pg[i]->off & ~CFS_PAGE_MASK;
1546 if (offset != 0) /* doesn't start on page boundary */
1553 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1555 struct brw_page **ppga;
1558 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1562 for (i = 0; i < count; i++)
1567 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1569 LASSERT(ppga != NULL);
1570 OBD_FREE(ppga, sizeof(*ppga) * count);
1573 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1574 obd_count page_count, struct brw_page *pga,
1575 struct obd_trans_info *oti)
1577 struct obdo *saved_oa = NULL;
1578 struct brw_page **ppga, **orig;
1579 struct obd_import *imp = class_exp2cliimp(exp);
1580 struct client_obd *cli = &imp->imp_obd->u.cli;
1581 int rc, page_count_orig;
1584 if (cmd & OBD_BRW_CHECK) {
1585 /* The caller just wants to know if there's a chance that this
1586 * I/O can succeed */
1588 if (imp == NULL || imp->imp_invalid)
1593 /* test_brw with a failed create can trip this, maybe others. */
1594 LASSERT(cli->cl_max_pages_per_rpc);
1598 orig = ppga = osc_build_ppga(pga, page_count);
1601 page_count_orig = page_count;
1603 sort_brw_pages(ppga, page_count);
1604 while (page_count) {
1605 obd_count pages_per_brw;
1607 if (page_count > cli->cl_max_pages_per_rpc)
1608 pages_per_brw = cli->cl_max_pages_per_rpc;
1610 pages_per_brw = page_count;
1612 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1614 if (saved_oa != NULL) {
1615 /* restore previously saved oa */
1616 *oinfo->oi_oa = *saved_oa;
1617 } else if (page_count > pages_per_brw) {
1618 /* save a copy of oa (brw will clobber it) */
1619 OBDO_ALLOC(saved_oa);
1620 if (saved_oa == NULL)
1621 GOTO(out, rc = -ENOMEM);
1622 *saved_oa = *oinfo->oi_oa;
1625 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1626 pages_per_brw, ppga, oinfo->oi_capa);
1631 page_count -= pages_per_brw;
1632 ppga += pages_per_brw;
1636 osc_release_ppga(orig, page_count_orig);
1638 if (saved_oa != NULL)
1639 OBDO_FREE(saved_oa);
1644 static int osc_brw_async(int cmd, struct obd_export *exp,
1645 struct obd_info *oinfo, obd_count page_count,
1646 struct brw_page *pga, struct obd_trans_info *oti,
1647 struct ptlrpc_request_set *set)
1649 struct brw_page **ppga, **orig;
1650 struct client_obd *cli = &exp->exp_obd->u.cli;
1651 int page_count_orig;
1655 if (cmd & OBD_BRW_CHECK) {
1656 struct obd_import *imp = class_exp2cliimp(exp);
1657 /* The caller just wants to know if there's a chance that this
1658 * I/O can succeed */
1660 if (imp == NULL || imp->imp_invalid)
1665 orig = ppga = osc_build_ppga(pga, page_count);
1668 page_count_orig = page_count;
1670 sort_brw_pages(ppga, page_count);
1671 while (page_count) {
1672 struct brw_page **copy;
1673 obd_count pages_per_brw;
1675 pages_per_brw = min_t(obd_count, page_count,
1676 cli->cl_max_pages_per_rpc);
1678 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1680 /* use ppga only if single RPC is going to fly */
1681 if (pages_per_brw != page_count_orig || ppga != orig) {
1682 OBD_ALLOC(copy, sizeof(*copy) * pages_per_brw);
1684 GOTO(out, rc = -ENOMEM);
1685 memcpy(copy, ppga, sizeof(*copy) * pages_per_brw);
1689 rc = async_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1690 pages_per_brw, copy, set, oinfo->oi_capa);
1694 OBD_FREE(copy, sizeof(*copy) * pages_per_brw);
1698 /* we passed it to async_internal() which is
1699 * now responsible for releasing memory */
1703 page_count -= pages_per_brw;
1704 ppga += pages_per_brw;
1708 osc_release_ppga(orig, page_count_orig);
1712 static void osc_check_rpcs(struct client_obd *cli);
1714 /* The companion to osc_enter_cache(), called when @oap is no longer part of
1715 * the dirty accounting. Writeback completes or truncate happens before
1716 * writing starts. Must be called with the loi lock held. */
1717 static void osc_exit_cache(struct client_obd *cli, struct osc_async_page *oap,
1720 osc_release_write_grant(cli, &oap->oap_brw_page, sent);
1724 /* This maintains the lists of pending pages to read/write for a given object
1725 * (lop). This is used by osc_check_rpcs->osc_next_loi() and loi_list_maint()
1726 * to quickly find objects that are ready to send an RPC. */
1727 static int lop_makes_rpc(struct client_obd *cli, struct loi_oap_pages *lop,
1733 if (lop->lop_num_pending == 0)
1736 /* if we have an invalid import we want to drain the queued pages
1737 * by forcing them through rpcs that immediately fail and complete
1738 * the pages. recovery relies on this to empty the queued pages
1739 * before canceling the locks and evicting down the llite pages */
1740 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
1743 /* stream rpcs in queue order as long as as there is an urgent page
1744 * queued. this is our cheap solution for good batching in the case
1745 * where writepage marks some random page in the middle of the file
1746 * as urgent because of, say, memory pressure */
1747 if (!list_empty(&lop->lop_urgent)) {
1748 CDEBUG(D_CACHE, "urgent request forcing RPC\n");
1751 /* fire off rpcs when we have 'optimal' rpcs as tuned for the wire. */
1752 optimal = cli->cl_max_pages_per_rpc;
1753 if (cmd & OBD_BRW_WRITE) {
1754 /* trigger a write rpc stream as long as there are dirtiers
1755 * waiting for space. as they're waiting, they're not going to
1756 * create more pages to coallesce with what's waiting.. */
1757 if (!list_empty(&cli->cl_cache_waiters)) {
1758 CDEBUG(D_CACHE, "cache waiters forcing RPC\n");
1761 /* +16 to avoid triggering rpcs that would want to include pages
1762 * that are being queued but which can't be made ready until
1763 * the queuer finishes with the page. this is a wart for
1764 * llite::commit_write() */
1767 if (lop->lop_num_pending >= optimal)
1773 static void on_list(struct list_head *item, struct list_head *list,
1776 if (list_empty(item) && should_be_on)
1777 list_add_tail(item, list);
1778 else if (!list_empty(item) && !should_be_on)
1779 list_del_init(item);
1782 /* maintain the loi's cli list membership invariants so that osc_send_oap_rpc
1783 * can find pages to build into rpcs quickly */
1784 static void loi_list_maint(struct client_obd *cli, struct lov_oinfo *loi)
1786 on_list(&loi->loi_cli_item, &cli->cl_loi_ready_list,
1787 lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE) ||
1788 lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ));
1790 on_list(&loi->loi_write_item, &cli->cl_loi_write_list,
1791 loi->loi_write_lop.lop_num_pending);
1793 on_list(&loi->loi_read_item, &cli->cl_loi_read_list,
1794 loi->loi_read_lop.lop_num_pending);
1797 static void lop_update_pending(struct client_obd *cli,
1798 struct loi_oap_pages *lop, int cmd, int delta)
1800 lop->lop_num_pending += delta;
1801 if (cmd & OBD_BRW_WRITE)
1802 cli->cl_pending_w_pages += delta;
1804 cli->cl_pending_r_pages += delta;
1807 /* this is called when a sync waiter receives an interruption. Its job is to
1808 * get the caller woken as soon as possible. If its page hasn't been put in an
1809 * rpc yet it can dequeue immediately. Otherwise it has to mark the rpc as
1810 * desiring interruption which will forcefully complete the rpc once the rpc
1812 static void osc_occ_interrupted(struct oig_callback_context *occ)
1814 struct osc_async_page *oap;
1815 struct loi_oap_pages *lop;
1816 struct lov_oinfo *loi;
1819 /* XXX member_of() */
1820 oap = list_entry(occ, struct osc_async_page, oap_occ);
1822 client_obd_list_lock(&oap->oap_cli->cl_loi_list_lock);
1824 oap->oap_interrupted = 1;
1826 /* ok, it's been put in an rpc. only one oap gets a request reference */
1827 if (oap->oap_request != NULL) {
1828 ptlrpc_mark_interrupted(oap->oap_request);
1829 ptlrpcd_wake(oap->oap_request);
1833 /* we don't get interruption callbacks until osc_trigger_group_io()
1834 * has been called and put the sync oaps in the pending/urgent lists.*/
1835 if (!list_empty(&oap->oap_pending_item)) {
1836 list_del_init(&oap->oap_pending_item);
1837 list_del_init(&oap->oap_urgent_item);
1840 lop = (oap->oap_cmd & OBD_BRW_WRITE) ?
1841 &loi->loi_write_lop : &loi->loi_read_lop;
1842 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, -1);
1843 loi_list_maint(oap->oap_cli, oap->oap_loi);
1845 oig_complete_one(oap->oap_oig, &oap->oap_occ, -EINTR);
1846 oap->oap_oig = NULL;
1850 client_obd_list_unlock(&oap->oap_cli->cl_loi_list_lock);
1853 /* this is trying to propogate async writeback errors back up to the
1854 * application. As an async write fails we record the error code for later if
1855 * the app does an fsync. As long as errors persist we force future rpcs to be
1856 * sync so that the app can get a sync error and break the cycle of queueing
1857 * pages for which writeback will fail. */
1858 static void osc_process_ar(struct osc_async_rc *ar, __u64 xid,
1865 ar->ar_force_sync = 1;
1866 ar->ar_min_xid = ptlrpc_sample_next_xid();
1871 if (ar->ar_force_sync && (xid >= ar->ar_min_xid))
1872 ar->ar_force_sync = 0;
1875 static void osc_oap_to_pending(struct osc_async_page *oap)
1877 struct loi_oap_pages *lop;
1879 if (oap->oap_cmd & OBD_BRW_WRITE)
1880 lop = &oap->oap_loi->loi_write_lop;
1882 lop = &oap->oap_loi->loi_read_lop;
1884 if (oap->oap_async_flags & ASYNC_URGENT)
1885 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
1886 list_add_tail(&oap->oap_pending_item, &lop->lop_pending);
1887 lop_update_pending(oap->oap_cli, lop, oap->oap_cmd, 1);
1890 /* this must be called holding the loi list lock to give coverage to exit_cache,
1891 * async_flag maintenance, and oap_request */
1892 static void osc_ap_completion(struct client_obd *cli, struct obdo *oa,
1893 struct osc_async_page *oap, int sent, int rc)
1898 if (oap->oap_request != NULL) {
1899 xid = ptlrpc_req_xid(oap->oap_request);
1900 ptlrpc_req_finished(oap->oap_request);
1901 oap->oap_request = NULL;
1904 oap->oap_async_flags = 0;
1905 oap->oap_interrupted = 0;
1907 if (oap->oap_cmd & OBD_BRW_WRITE) {
1908 osc_process_ar(&cli->cl_ar, xid, rc);
1909 osc_process_ar(&oap->oap_loi->loi_ar, xid, rc);
1912 if (rc == 0 && oa != NULL) {
1913 if (oa->o_valid & OBD_MD_FLBLOCKS)
1914 oap->oap_loi->loi_lvb.lvb_blocks = oa->o_blocks;
1915 if (oa->o_valid & OBD_MD_FLMTIME)
1916 oap->oap_loi->loi_lvb.lvb_mtime = oa->o_mtime;
1917 if (oa->o_valid & OBD_MD_FLATIME)
1918 oap->oap_loi->loi_lvb.lvb_atime = oa->o_atime;
1919 if (oa->o_valid & OBD_MD_FLCTIME)
1920 oap->oap_loi->loi_lvb.lvb_ctime = oa->o_ctime;
1924 osc_exit_cache(cli, oap, sent);
1925 oig_complete_one(oap->oap_oig, &oap->oap_occ, rc);
1926 oap->oap_oig = NULL;
1931 rc = oap->oap_caller_ops->ap_completion(oap->oap_caller_data,
1932 oap->oap_cmd, oa, rc);
1934 /* ll_ap_completion (from llite) drops PG_locked. so, a new
1935 * I/O on the page could start, but OSC calls it under lock
1936 * and thus we can add oap back to pending safely */
1938 /* upper layer wants to leave the page on pending queue */
1939 osc_oap_to_pending(oap);
1941 osc_exit_cache(cli, oap, sent);
1945 static int brw_interpret_oap(struct ptlrpc_request *req, void *data, int rc)
1947 struct osc_async_page *oap, *tmp;
1948 struct osc_brw_async_args *aa = data;
1949 struct client_obd *cli;
1952 rc = osc_brw_fini_request(req, rc);
1953 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1954 if (osc_recoverable_error(rc)) {
1955 rc = osc_brw_redo_request(req, aa);
1962 client_obd_list_lock(&cli->cl_loi_list_lock);
1964 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1965 * is called so we know whether to go to sync BRWs or wait for more
1966 * RPCs to complete */
1967 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
1968 cli->cl_w_in_flight--;
1970 cli->cl_r_in_flight--;
1972 /* the caller may re-use the oap after the completion call so
1973 * we need to clean it up a little */
1974 list_for_each_entry_safe(oap, tmp, &aa->aa_oaps, oap_rpc_item) {
1975 list_del_init(&oap->oap_rpc_item);
1976 osc_ap_completion(cli, aa->aa_oa, oap, 1, rc);
1979 osc_wake_cache_waiters(cli);
1980 osc_check_rpcs(cli);
1982 client_obd_list_unlock(&cli->cl_loi_list_lock);
1984 OBDO_FREE(aa->aa_oa);
1986 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1990 static struct ptlrpc_request *osc_build_req(struct client_obd *cli,
1991 struct list_head *rpc_list,
1992 int page_count, int cmd)
1994 struct ptlrpc_request *req;
1995 struct brw_page **pga = NULL;
1996 struct osc_brw_async_args *aa;
1997 struct obdo *oa = NULL;
1998 struct obd_async_page_ops *ops = NULL;
1999 void *caller_data = NULL;
2000 struct obd_capa *ocapa;
2001 struct osc_async_page *oap;
2005 LASSERT(!list_empty(rpc_list));
2007 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2009 RETURN(ERR_PTR(-ENOMEM));
2013 GOTO(out, req = ERR_PTR(-ENOMEM));
2016 list_for_each_entry(oap, rpc_list, oap_rpc_item) {
2018 ops = oap->oap_caller_ops;
2019 caller_data = oap->oap_caller_data;
2021 pga[i] = &oap->oap_brw_page;
2022 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2023 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2024 pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
2028 /* always get the data for the obdo for the rpc */
2029 LASSERT(ops != NULL);
2030 ops->ap_fill_obdo(caller_data, cmd, oa);
2031 ocapa = ops->ap_lookup_capa(caller_data, cmd);
2033 sort_brw_pages(pga, page_count);
2034 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2038 CERROR("prep_req failed: %d\n", rc);
2039 GOTO(out, req = ERR_PTR(rc));
2042 /* Need to update the timestamps after the request is built in case
2043 * we race with setattr (locally or in queue at OST). If OST gets
2044 * later setattr before earlier BRW (as determined by the request xid),
2045 * the OST will not use BRW timestamps. Sadly, there is no obvious
2046 * way to do this in a single call. bug 10150 */
2047 ops->ap_update_obdo(caller_data, cmd, oa,
2048 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLATIME);
2050 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2051 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2052 INIT_LIST_HEAD(&aa->aa_oaps);
2053 list_splice(rpc_list, &aa->aa_oaps);
2054 INIT_LIST_HEAD(rpc_list);
2061 OBD_FREE(pga, sizeof(*pga) * page_count);
2066 /* the loi lock is held across this function but it's allowed to release
2067 * and reacquire it during its work */
2068 static int osc_send_oap_rpc(struct client_obd *cli, struct lov_oinfo *loi,
2069 int cmd, struct loi_oap_pages *lop)
2071 struct ptlrpc_request *req;
2072 obd_count page_count = 0;
2073 struct osc_async_page *oap = NULL, *tmp;
2074 struct osc_brw_async_args *aa;
2075 struct obd_async_page_ops *ops;
2076 CFS_LIST_HEAD(rpc_list);
2077 unsigned int ending_offset;
2078 unsigned starting_offset = 0;
2081 /* first we find the pages we're allowed to work with */
2082 list_for_each_entry_safe(oap, tmp, &lop->lop_pending,
2084 ops = oap->oap_caller_ops;
2086 LASSERT(oap->oap_magic == OAP_MAGIC);
2088 /* in llite being 'ready' equates to the page being locked
2089 * until completion unlocks it. commit_write submits a page
2090 * as not ready because its unlock will happen unconditionally
2091 * as the call returns. if we race with commit_write giving
2092 * us that page we dont' want to create a hole in the page
2093 * stream, so we stop and leave the rpc to be fired by
2094 * another dirtier or kupdated interval (the not ready page
2095 * will still be on the dirty list). we could call in
2096 * at the end of ll_file_write to process the queue again. */
2097 if (!(oap->oap_async_flags & ASYNC_READY)) {
2098 int rc = ops->ap_make_ready(oap->oap_caller_data, cmd);
2100 CDEBUG(D_INODE, "oap %p page %p returned %d "
2101 "instead of ready\n", oap,
2105 /* llite is telling us that the page is still
2106 * in commit_write and that we should try
2107 * and put it in an rpc again later. we
2108 * break out of the loop so we don't create
2109 * a hole in the sequence of pages in the rpc
2114 /* the io isn't needed.. tell the checks
2115 * below to complete the rpc with EINTR */
2116 oap->oap_async_flags |= ASYNC_COUNT_STABLE;
2117 oap->oap_count = -EINTR;
2120 oap->oap_async_flags |= ASYNC_READY;
2123 LASSERTF(0, "oap %p page %p returned %d "
2124 "from make_ready\n", oap,
2132 * Page submitted for IO has to be locked. Either by
2133 * ->ap_make_ready() or by higher layers.
2135 * XXX nikita: this assertion should be adjusted when lustre
2136 * starts using PG_writeback for pages being written out.
2138 #if defined(__KERNEL__) && defined(__linux__)
2139 LASSERT(PageLocked(oap->oap_page));
2141 /* If there is a gap at the start of this page, it can't merge
2142 * with any previous page, so we'll hand the network a
2143 * "fragmented" page array that it can't transfer in 1 RDMA */
2144 if (page_count != 0 && oap->oap_page_off != 0)
2147 /* take the page out of our book-keeping */
2148 list_del_init(&oap->oap_pending_item);
2149 lop_update_pending(cli, lop, cmd, -1);
2150 list_del_init(&oap->oap_urgent_item);
2152 if (page_count == 0)
2153 starting_offset = (oap->oap_obj_off+oap->oap_page_off) &
2154 (PTLRPC_MAX_BRW_SIZE - 1);
2156 /* ask the caller for the size of the io as the rpc leaves. */
2157 if (!(oap->oap_async_flags & ASYNC_COUNT_STABLE))
2159 ops->ap_refresh_count(oap->oap_caller_data,cmd);
2160 if (oap->oap_count <= 0) {
2161 CDEBUG(D_CACHE, "oap %p count %d, completing\n", oap,
2163 osc_ap_completion(cli, NULL, oap, 0, oap->oap_count);
2167 /* now put the page back in our accounting */
2168 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2169 if (++page_count >= cli->cl_max_pages_per_rpc)
2172 /* End on a PTLRPC_MAX_BRW_SIZE boundary. We want full-sized
2173 * RPCs aligned on PTLRPC_MAX_BRW_SIZE boundaries to help reads
2174 * have the same alignment as the initial writes that allocated
2175 * extents on the server. */
2176 ending_offset = (oap->oap_obj_off + oap->oap_page_off +
2177 oap->oap_count) & (PTLRPC_MAX_BRW_SIZE - 1);
2178 if (ending_offset == 0)
2181 /* If there is a gap at the end of this page, it can't merge
2182 * with any subsequent pages, so we'll hand the network a
2183 * "fragmented" page array that it can't transfer in 1 RDMA */
2184 if (oap->oap_page_off + oap->oap_count < CFS_PAGE_SIZE)
2188 osc_wake_cache_waiters(cli);
2190 if (page_count == 0)
2193 loi_list_maint(cli, loi);
2195 client_obd_list_unlock(&cli->cl_loi_list_lock);
2197 req = osc_build_req(cli, &rpc_list, page_count, cmd);
2199 /* this should happen rarely and is pretty bad, it makes the
2200 * pending list not follow the dirty order */
2201 client_obd_list_lock(&cli->cl_loi_list_lock);
2202 list_for_each_entry_safe(oap, tmp, &rpc_list, oap_rpc_item) {
2203 list_del_init(&oap->oap_rpc_item);
2205 /* queued sync pages can be torn down while the pages
2206 * were between the pending list and the rpc */
2207 if (oap->oap_interrupted) {
2208 CDEBUG(D_INODE, "oap %p interrupted\n", oap);
2209 osc_ap_completion(cli, NULL, oap, 0,
2213 osc_ap_completion(cli, NULL, oap, 0, PTR_ERR(req));
2215 loi_list_maint(cli, loi);
2216 RETURN(PTR_ERR(req));
2219 aa = (struct osc_brw_async_args *)&req->rq_async_args;
2221 if (cmd == OBD_BRW_READ) {
2222 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2223 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2224 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2225 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2226 ptlrpc_lprocfs_brw(req, OST_READ, aa->aa_requested_nob);
2228 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2229 lprocfs_oh_tally(&cli->cl_write_rpc_hist,
2230 cli->cl_w_in_flight);
2231 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2232 (starting_offset >> CFS_PAGE_SHIFT) + 1);
2233 ptlrpc_lprocfs_brw(req, OST_WRITE, aa->aa_requested_nob);
2236 client_obd_list_lock(&cli->cl_loi_list_lock);
2238 if (cmd == OBD_BRW_READ)
2239 cli->cl_r_in_flight++;
2241 cli->cl_w_in_flight++;
2243 /* queued sync pages can be torn down while the pages
2244 * were between the pending list and the rpc */
2246 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2247 /* only one oap gets a request reference */
2250 if (oap->oap_interrupted && !req->rq_intr) {
2251 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2253 ptlrpc_mark_interrupted(req);
2257 tmp->oap_request = ptlrpc_request_addref(req);
2259 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2260 page_count, aa, cli->cl_r_in_flight, cli->cl_w_in_flight);
2262 req->rq_interpret_reply = brw_interpret_oap;
2263 ptlrpcd_add_req(req);
2267 #define LOI_DEBUG(LOI, STR, args...) \
2268 CDEBUG(D_INODE, "loi ready %d wr %d:%d rd %d:%d " STR, \
2269 !list_empty(&(LOI)->loi_cli_item), \
2270 (LOI)->loi_write_lop.lop_num_pending, \
2271 !list_empty(&(LOI)->loi_write_lop.lop_urgent), \
2272 (LOI)->loi_read_lop.lop_num_pending, \
2273 !list_empty(&(LOI)->loi_read_lop.lop_urgent), \
2276 /* This is called by osc_check_rpcs() to find which objects have pages that
2277 * we could be sending. These lists are maintained by lop_makes_rpc(). */
2278 struct lov_oinfo *osc_next_loi(struct client_obd *cli)
2281 /* first return all objects which we already know to have
2282 * pages ready to be stuffed into rpcs */
2283 if (!list_empty(&cli->cl_loi_ready_list))
2284 RETURN(list_entry(cli->cl_loi_ready_list.next,
2285 struct lov_oinfo, loi_cli_item));
2287 /* then if we have cache waiters, return all objects with queued
2288 * writes. This is especially important when many small files
2289 * have filled up the cache and not been fired into rpcs because
2290 * they don't pass the nr_pending/object threshhold */
2291 if (!list_empty(&cli->cl_cache_waiters) &&
2292 !list_empty(&cli->cl_loi_write_list))
2293 RETURN(list_entry(cli->cl_loi_write_list.next,
2294 struct lov_oinfo, loi_write_item));
2296 /* then return all queued objects when we have an invalid import
2297 * so that they get flushed */
2298 if (cli->cl_import == NULL || cli->cl_import->imp_invalid) {
2299 if (!list_empty(&cli->cl_loi_write_list))
2300 RETURN(list_entry(cli->cl_loi_write_list.next,
2301 struct lov_oinfo, loi_write_item));
2302 if (!list_empty(&cli->cl_loi_read_list))
2303 RETURN(list_entry(cli->cl_loi_read_list.next,
2304 struct lov_oinfo, loi_read_item));
2309 /* called with the loi list lock held */
2310 static void osc_check_rpcs(struct client_obd *cli)
2312 struct lov_oinfo *loi;
2313 int rc = 0, race_counter = 0;
2316 while ((loi = osc_next_loi(cli)) != NULL) {
2317 LOI_DEBUG(loi, "%lu in flight\n", rpcs_in_flight(cli));
2319 if (rpcs_in_flight(cli) >= cli->cl_max_rpcs_in_flight)
2322 /* attempt some read/write balancing by alternating between
2323 * reads and writes in an object. The makes_rpc checks here
2324 * would be redundant if we were getting read/write work items
2325 * instead of objects. we don't want send_oap_rpc to drain a
2326 * partial read pending queue when we're given this object to
2327 * do io on writes while there are cache waiters */
2328 if (lop_makes_rpc(cli, &loi->loi_write_lop, OBD_BRW_WRITE)) {
2329 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_WRITE,
2330 &loi->loi_write_lop);
2338 if (lop_makes_rpc(cli, &loi->loi_read_lop, OBD_BRW_READ)) {
2339 rc = osc_send_oap_rpc(cli, loi, OBD_BRW_READ,
2340 &loi->loi_read_lop);
2349 /* attempt some inter-object balancing by issueing rpcs
2350 * for each object in turn */
2351 if (!list_empty(&loi->loi_cli_item))
2352 list_del_init(&loi->loi_cli_item);
2353 if (!list_empty(&loi->loi_write_item))
2354 list_del_init(&loi->loi_write_item);
2355 if (!list_empty(&loi->loi_read_item))
2356 list_del_init(&loi->loi_read_item);
2358 loi_list_maint(cli, loi);
2360 /* send_oap_rpc fails with 0 when make_ready tells it to
2361 * back off. llite's make_ready does this when it tries
2362 * to lock a page queued for write that is already locked.
2363 * we want to try sending rpcs from many objects, but we
2364 * don't want to spin failing with 0. */
2365 if (race_counter == 10)
2371 /* we're trying to queue a page in the osc so we're subject to the
2372 * 'cl_dirty_max' limit on the number of pages that can be queued in the osc.
2373 * If the osc's queued pages are already at that limit, then we want to sleep
2374 * until there is space in the osc's queue for us. We also may be waiting for
2375 * write credits from the OST if there are RPCs in flight that may return some
2376 * before we fall back to sync writes.
2378 * We need this know our allocation was granted in the presence of signals */
2379 static int ocw_granted(struct client_obd *cli, struct osc_cache_waiter *ocw)
2383 client_obd_list_lock(&cli->cl_loi_list_lock);
2384 rc = list_empty(&ocw->ocw_entry) || rpcs_in_flight(cli) == 0;
2385 client_obd_list_unlock(&cli->cl_loi_list_lock);
2389 /* Caller must hold loi_list_lock - we drop/regain it if we need to wait for
2390 * grant or cache space. */
2391 static int osc_enter_cache(struct client_obd *cli, struct lov_oinfo *loi,
2392 struct osc_async_page *oap)
2394 struct osc_cache_waiter ocw;
2395 struct l_wait_info lwi = { 0 };
2399 CDEBUG(D_CACHE, "dirty: %ld/%d dirty_max: %ld/%d dropped: %lu "
2400 "grant: %lu\n", cli->cl_dirty, atomic_read(&obd_dirty_pages),
2401 cli->cl_dirty_max, obd_max_dirty_pages,
2402 cli->cl_lost_grant, cli->cl_avail_grant);
2404 /* force the caller to try sync io. this can jump the list
2405 * of queued writes and create a discontiguous rpc stream */
2406 if (cli->cl_dirty_max < CFS_PAGE_SIZE || cli->cl_ar.ar_force_sync ||
2407 loi->loi_ar.ar_force_sync)
2410 /* Hopefully normal case - cache space and write credits available */
2411 if ((cli->cl_dirty + CFS_PAGE_SIZE <= cli->cl_dirty_max) &&
2412 (atomic_read(&obd_dirty_pages) + 1 <= obd_max_dirty_pages) &&
2413 (cli->cl_avail_grant >= CFS_PAGE_SIZE)) {
2414 /* account for ourselves */
2415 osc_consume_write_grant(cli, &oap->oap_brw_page);
2419 /* Make sure that there are write rpcs in flight to wait for. This
2420 * is a little silly as this object may not have any pending but
2421 * other objects sure might. */
2422 if (cli->cl_w_in_flight) {
2423 list_add_tail(&ocw.ocw_entry, &cli->cl_cache_waiters);
2424 cfs_waitq_init(&ocw.ocw_waitq);
2428 loi_list_maint(cli, loi);
2429 osc_check_rpcs(cli);
2430 client_obd_list_unlock(&cli->cl_loi_list_lock);
2432 CDEBUG(D_CACHE, "sleeping for cache space\n");
2433 l_wait_event(ocw.ocw_waitq, ocw_granted(cli, &ocw), &lwi);
2435 client_obd_list_lock(&cli->cl_loi_list_lock);
2436 if (!list_empty(&ocw.ocw_entry)) {
2437 list_del(&ocw.ocw_entry);
2446 int osc_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
2447 struct lov_oinfo *loi, cfs_page_t *page,
2448 obd_off offset, struct obd_async_page_ops *ops,
2449 void *data, void **res)
2451 struct osc_async_page *oap;
2455 return size_round(sizeof(*oap));
2458 oap->oap_magic = OAP_MAGIC;
2459 oap->oap_cli = &exp->exp_obd->u.cli;
2462 oap->oap_caller_ops = ops;
2463 oap->oap_caller_data = data;
2465 oap->oap_page = page;
2466 oap->oap_obj_off = offset;
2468 CFS_INIT_LIST_HEAD(&oap->oap_pending_item);
2469 CFS_INIT_LIST_HEAD(&oap->oap_urgent_item);
2470 CFS_INIT_LIST_HEAD(&oap->oap_rpc_item);
2472 oap->oap_occ.occ_interrupted = osc_occ_interrupted;
2474 CDEBUG(D_CACHE, "oap %p page %p obj off "LPU64"\n", oap, page, offset);
2478 struct osc_async_page *oap_from_cookie(void *cookie)
2480 struct osc_async_page *oap = cookie;
2481 if (oap->oap_magic != OAP_MAGIC)
2482 return ERR_PTR(-EINVAL);
2486 static int osc_queue_async_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2487 struct lov_oinfo *loi, void *cookie,
2488 int cmd, obd_off off, int count,
2489 obd_flag brw_flags, enum async_flags async_flags)
2491 struct client_obd *cli = &exp->exp_obd->u.cli;
2492 struct osc_async_page *oap;
2496 oap = oap_from_cookie(cookie);
2498 RETURN(PTR_ERR(oap));
2500 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2503 if (!list_empty(&oap->oap_pending_item) ||
2504 !list_empty(&oap->oap_urgent_item) ||
2505 !list_empty(&oap->oap_rpc_item))
2508 /* check if the file's owner/group is over quota */
2509 #ifdef HAVE_QUOTA_SUPPORT
2510 if ((cmd & OBD_BRW_WRITE) && !(cmd & OBD_BRW_NOQUOTA)){
2511 struct obd_async_page_ops *ops;
2518 ops = oap->oap_caller_ops;
2519 ops->ap_fill_obdo(oap->oap_caller_data, cmd, oa);
2520 if (lquota_chkdq(quota_interface, cli, oa->o_uid, oa->o_gid) ==
2531 loi = lsm->lsm_oinfo[0];
2533 client_obd_list_lock(&cli->cl_loi_list_lock);
2536 oap->oap_page_off = off;
2537 oap->oap_count = count;
2538 oap->oap_brw_flags = brw_flags;
2539 oap->oap_async_flags = async_flags;
2541 if (cmd & OBD_BRW_WRITE) {
2542 rc = osc_enter_cache(cli, loi, oap);
2544 client_obd_list_unlock(&cli->cl_loi_list_lock);
2549 osc_oap_to_pending(oap);
2550 loi_list_maint(cli, loi);
2552 LOI_DEBUG(loi, "oap %p page %p added for cmd %d\n", oap, oap->oap_page,
2555 osc_check_rpcs(cli);
2556 client_obd_list_unlock(&cli->cl_loi_list_lock);
2561 /* aka (~was & now & flag), but this is more clear :) */
2562 #define SETTING(was, now, flag) (!(was & flag) && (now & flag))
2564 static int osc_set_async_flags(struct obd_export *exp,
2565 struct lov_stripe_md *lsm,
2566 struct lov_oinfo *loi, void *cookie,
2567 obd_flag async_flags)
2569 struct client_obd *cli = &exp->exp_obd->u.cli;
2570 struct loi_oap_pages *lop;
2571 struct osc_async_page *oap;
2575 oap = oap_from_cookie(cookie);
2577 RETURN(PTR_ERR(oap));
2580 * bug 7311: OST-side locking is only supported for liblustre for now
2581 * (and liblustre never calls obd_set_async_flags(). I hope.), generic
2582 * implementation has to handle case where OST-locked page was picked
2583 * up by, e.g., ->writepage().
2585 LASSERT(!(oap->oap_brw_flags & OBD_BRW_SRVLOCK));
2586 LASSERT(!LIBLUSTRE_CLIENT); /* check that liblustre angels do fear to
2589 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2593 loi = lsm->lsm_oinfo[0];
2595 if (oap->oap_cmd & OBD_BRW_WRITE) {
2596 lop = &loi->loi_write_lop;
2598 lop = &loi->loi_read_lop;
2601 client_obd_list_lock(&cli->cl_loi_list_lock);
2603 if (list_empty(&oap->oap_pending_item))
2604 GOTO(out, rc = -EINVAL);
2606 if ((oap->oap_async_flags & async_flags) == async_flags)
2609 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_READY))
2610 oap->oap_async_flags |= ASYNC_READY;
2612 if (SETTING(oap->oap_async_flags, async_flags, ASYNC_URGENT)) {
2613 if (list_empty(&oap->oap_rpc_item)) {
2614 list_add(&oap->oap_urgent_item, &lop->lop_urgent);
2615 loi_list_maint(cli, loi);
2619 LOI_DEBUG(loi, "oap %p page %p has flags %x\n", oap, oap->oap_page,
2620 oap->oap_async_flags);
2622 osc_check_rpcs(cli);
2623 client_obd_list_unlock(&cli->cl_loi_list_lock);
2627 static int osc_queue_group_io(struct obd_export *exp, struct lov_stripe_md *lsm,
2628 struct lov_oinfo *loi,
2629 struct obd_io_group *oig, void *cookie,
2630 int cmd, obd_off off, int count,
2632 obd_flag async_flags)
2634 struct client_obd *cli = &exp->exp_obd->u.cli;
2635 struct osc_async_page *oap;
2636 struct loi_oap_pages *lop;
2640 oap = oap_from_cookie(cookie);
2642 RETURN(PTR_ERR(oap));
2644 if (cli->cl_import == NULL || cli->cl_import->imp_invalid)
2647 if (!list_empty(&oap->oap_pending_item) ||
2648 !list_empty(&oap->oap_urgent_item) ||
2649 !list_empty(&oap->oap_rpc_item))
2653 loi = lsm->lsm_oinfo[0];
2655 client_obd_list_lock(&cli->cl_loi_list_lock);
2658 oap->oap_page_off = off;
2659 oap->oap_count = count;
2660 oap->oap_brw_flags = brw_flags;
2661 oap->oap_async_flags = async_flags;
2663 if (cmd & OBD_BRW_WRITE)
2664 lop = &loi->loi_write_lop;
2666 lop = &loi->loi_read_lop;
2668 list_add_tail(&oap->oap_pending_item, &lop->lop_pending_group);
2669 if (oap->oap_async_flags & ASYNC_GROUP_SYNC) {
2671 rc = oig_add_one(oig, &oap->oap_occ);
2674 LOI_DEBUG(loi, "oap %p page %p on group pending: rc %d\n",
2675 oap, oap->oap_page, rc);
2677 client_obd_list_unlock(&cli->cl_loi_list_lock);
2682 static void osc_group_to_pending(struct client_obd *cli, struct lov_oinfo *loi,
2683 struct loi_oap_pages *lop, int cmd)
2685 struct list_head *pos, *tmp;
2686 struct osc_async_page *oap;
2688 list_for_each_safe(pos, tmp, &lop->lop_pending_group) {
2689 oap = list_entry(pos, struct osc_async_page, oap_pending_item);
2690 list_del(&oap->oap_pending_item);
2691 osc_oap_to_pending(oap);
2693 loi_list_maint(cli, loi);
2696 static int osc_trigger_group_io(struct obd_export *exp,
2697 struct lov_stripe_md *lsm,
2698 struct lov_oinfo *loi,
2699 struct obd_io_group *oig)
2701 struct client_obd *cli = &exp->exp_obd->u.cli;
2705 loi = lsm->lsm_oinfo[0];
2707 client_obd_list_lock(&cli->cl_loi_list_lock);
2709 osc_group_to_pending(cli, loi, &loi->loi_write_lop, OBD_BRW_WRITE);
2710 osc_group_to_pending(cli, loi, &loi->loi_read_lop, OBD_BRW_READ);
2712 osc_check_rpcs(cli);
2713 client_obd_list_unlock(&cli->cl_loi_list_lock);
2718 static int osc_teardown_async_page(struct obd_export *exp,
2719 struct lov_stripe_md *lsm,
2720 struct lov_oinfo *loi, void *cookie)
2722 struct client_obd *cli = &exp->exp_obd->u.cli;
2723 struct loi_oap_pages *lop;
2724 struct osc_async_page *oap;
2728 oap = oap_from_cookie(cookie);
2730 RETURN(PTR_ERR(oap));
2733 loi = lsm->lsm_oinfo[0];
2735 if (oap->oap_cmd & OBD_BRW_WRITE) {
2736 lop = &loi->loi_write_lop;
2738 lop = &loi->loi_read_lop;
2741 client_obd_list_lock(&cli->cl_loi_list_lock);
2743 if (!list_empty(&oap->oap_rpc_item))
2744 GOTO(out, rc = -EBUSY);
2746 osc_exit_cache(cli, oap, 0);
2747 osc_wake_cache_waiters(cli);
2749 if (!list_empty(&oap->oap_urgent_item)) {
2750 list_del_init(&oap->oap_urgent_item);
2751 oap->oap_async_flags &= ~ASYNC_URGENT;
2753 if (!list_empty(&oap->oap_pending_item)) {
2754 list_del_init(&oap->oap_pending_item);
2755 lop_update_pending(cli, lop, oap->oap_cmd, -1);
2757 loi_list_maint(cli, loi);
2759 LOI_DEBUG(loi, "oap %p page %p torn down\n", oap, oap->oap_page);
2761 client_obd_list_unlock(&cli->cl_loi_list_lock);
2765 static void osc_set_data_with_check(struct lustre_handle *lockh, void *data,
2768 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2771 CERROR("lockh %p, data %p - client evicted?\n", lockh, data);
2774 lock_res_and_lock(lock);
2775 #if defined (__KERNEL__) && defined (__linux__)
2776 /* Liang XXX: Darwin and Winnt checking should be added */
2777 if (lock->l_ast_data && lock->l_ast_data != data) {
2778 struct inode *new_inode = data;
2779 struct inode *old_inode = lock->l_ast_data;
2780 if (!(old_inode->i_state & I_FREEING))
2781 LDLM_ERROR(lock, "inconsistent l_ast_data found");
2782 LASSERTF(old_inode->i_state & I_FREEING,
2783 "Found existing inode %p/%lu/%u state %lu in lock: "
2784 "setting data to %p/%lu/%u\n", old_inode,
2785 old_inode->i_ino, old_inode->i_generation,
2787 new_inode, new_inode->i_ino, new_inode->i_generation);
2790 lock->l_ast_data = data;
2791 lock->l_flags |= (flags & LDLM_FL_NO_LRU);
2792 unlock_res_and_lock(lock);
2793 LDLM_LOCK_PUT(lock);
2796 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2797 ldlm_iterator_t replace, void *data)
2799 struct ldlm_res_id res_id = { .name = {0} };
2800 struct obd_device *obd = class_exp2obd(exp);
2802 res_id.name[0] = lsm->lsm_object_id;
2803 res_id.name[2] = lsm->lsm_object_gr;
2805 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2809 static int osc_enqueue_fini(struct ptlrpc_request *req, struct obd_info *oinfo,
2815 /* The request was created before ldlm_cli_enqueue call. */
2816 if (rc == ELDLM_LOCK_ABORTED) {
2817 struct ldlm_reply *rep;
2819 /* swabbed by ldlm_cli_enqueue() */
2820 LASSERT(lustre_rep_swabbed(req, DLM_LOCKREPLY_OFF));
2821 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
2823 LASSERT(rep != NULL);
2824 if (rep->lock_policy_res1)
2825 rc = rep->lock_policy_res1;
2829 if ((intent && rc == ELDLM_LOCK_ABORTED) || !rc) {
2830 CDEBUG(D_INODE,"got kms "LPU64" blocks "LPU64" mtime "LPU64"\n",
2831 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_size,
2832 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_blocks,
2833 oinfo->oi_md->lsm_oinfo[0]->loi_lvb.lvb_mtime);
2836 /* Call the update callback. */
2837 rc = oinfo->oi_cb_up(oinfo, rc);
2841 static int osc_enqueue_interpret(struct ptlrpc_request *req,
2842 struct osc_enqueue_args *aa, int rc)
2844 int intent = aa->oa_oi->oi_flags & LDLM_FL_HAS_INTENT;
2845 struct lov_stripe_md *lsm = aa->oa_oi->oi_md;
2846 struct ldlm_lock *lock;
2848 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2850 lock = ldlm_handle2lock(aa->oa_oi->oi_lockh);
2852 /* Complete obtaining the lock procedure. */
2853 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
2855 &aa->oa_oi->oi_flags,
2856 &lsm->lsm_oinfo[0]->loi_lvb,
2857 sizeof(lsm->lsm_oinfo[0]->loi_lvb),
2858 lustre_swab_ost_lvb,
2859 aa->oa_oi->oi_lockh, rc);
2861 /* Complete osc stuff. */
2862 rc = osc_enqueue_fini(req, aa->oa_oi, intent, rc);
2864 /* Release the lock for async request. */
2865 if (lustre_handle_is_used(aa->oa_oi->oi_lockh) && rc == ELDLM_OK)
2866 ldlm_lock_decref(aa->oa_oi->oi_lockh, aa->oa_ei->ei_mode);
2868 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
2869 aa->oa_oi->oi_lockh, req, aa);
2870 LDLM_LOCK_PUT(lock);
2874 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2875 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2876 * other synchronous requests, however keeping some locks and trying to obtain
2877 * others may take a considerable amount of time in a case of ost failure; and
2878 * when other sync requests do not get released lock from a client, the client
2879 * is excluded from the cluster -- such scenarious make the life difficult, so
2880 * release locks just after they are obtained. */
2881 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
2882 struct ldlm_enqueue_info *einfo,
2883 struct ptlrpc_request_set *rqset)
2885 struct ldlm_res_id res_id = { .name = {0} };
2886 struct obd_device *obd = exp->exp_obd;
2887 struct ldlm_reply *rep;
2888 struct ptlrpc_request *req = NULL;
2889 int intent = oinfo->oi_flags & LDLM_FL_HAS_INTENT;
2894 res_id.name[0] = oinfo->oi_md->lsm_object_id;
2895 res_id.name[2] = oinfo->oi_md->lsm_object_gr;
2897 /* Filesystem lock extents are extended to page boundaries so that
2898 * dealing with the page cache is a little smoother. */
2899 oinfo->oi_policy.l_extent.start -=
2900 oinfo->oi_policy.l_extent.start & ~CFS_PAGE_MASK;
2901 oinfo->oi_policy.l_extent.end |= ~CFS_PAGE_MASK;
2903 if (oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid == 0)
2906 /* Next, search for already existing extent locks that will cover us */
2907 /* If we're trying to read, we also search for an existing PW lock. The
2908 * VFS and page cache already protect us locally, so lots of readers/
2909 * writers can share a single PW lock.
2911 * There are problems with conversion deadlocks, so instead of
2912 * converting a read lock to a write lock, we'll just enqueue a new
2915 * At some point we should cancel the read lock instead of making them
2916 * send us a blocking callback, but there are problems with canceling
2917 * locks out from other users right now, too. */
2918 mode = einfo->ei_mode;
2919 if (einfo->ei_mode == LCK_PR)
2921 mode = ldlm_lock_match(obd->obd_namespace,
2922 oinfo->oi_flags | LDLM_FL_LVB_READY, &res_id,
2923 einfo->ei_type, &oinfo->oi_policy, mode,
2926 /* addref the lock only if not async requests and PW lock is
2927 * matched whereas we asked for PR. */
2928 if (!rqset && einfo->ei_mode != mode)
2929 ldlm_lock_addref(oinfo->oi_lockh, LCK_PR);
2930 osc_set_data_with_check(oinfo->oi_lockh, einfo->ei_cbdata,
2933 /* I would like to be able to ASSERT here that rss <=
2934 * kms, but I can't, for reasons which are explained in
2938 /* We already have a lock, and it's referenced */
2939 oinfo->oi_cb_up(oinfo, ELDLM_OK);
2941 /* For async requests, decref the lock. */
2942 if (einfo->ei_mode != mode)
2943 ldlm_lock_decref(oinfo->oi_lockh, LCK_PW);
2945 ldlm_lock_decref(oinfo->oi_lockh, einfo->ei_mode);
2953 [MSG_PTLRPC_BODY_OFF] = sizeof(struct ptlrpc_body),
2954 [DLM_LOCKREQ_OFF] = sizeof(struct ldlm_request),
2955 [DLM_LOCKREQ_OFF + 1] = 0 };
2957 req = ldlm_prep_enqueue_req(exp, 2, size, NULL, 0);
2961 size[DLM_LOCKREPLY_OFF] = sizeof(*rep);
2962 size[DLM_REPLY_REC_OFF] =
2963 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb);
2964 ptlrpc_req_set_repsize(req, 3, size);
2967 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2968 oinfo->oi_flags &= ~LDLM_FL_BLOCK_GRANTED;
2970 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id,
2971 &oinfo->oi_policy, &oinfo->oi_flags,
2972 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
2973 sizeof(oinfo->oi_md->lsm_oinfo[0]->loi_lvb),
2974 lustre_swab_ost_lvb, oinfo->oi_lockh,
2978 struct osc_enqueue_args *aa;
2979 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2980 aa = (struct osc_enqueue_args *)&req->rq_async_args;
2985 req->rq_interpret_reply = osc_enqueue_interpret;
2986 ptlrpc_set_add_req(rqset, req);
2987 } else if (intent) {
2988 ptlrpc_req_finished(req);
2993 rc = osc_enqueue_fini(req, oinfo, intent, rc);
2995 ptlrpc_req_finished(req);
3000 static int osc_match(struct obd_export *exp, struct lov_stripe_md *lsm,
3001 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
3002 int *flags, void *data, struct lustre_handle *lockh)
3004 struct ldlm_res_id res_id = { .name = {0} };
3005 struct obd_device *obd = exp->exp_obd;
3006 int lflags = *flags;
3010 res_id.name[0] = lsm->lsm_object_id;
3011 res_id.name[2] = lsm->lsm_object_gr;
3013 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
3016 /* Filesystem lock extents are extended to page boundaries so that
3017 * dealing with the page cache is a little smoother */
3018 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
3019 policy->l_extent.end |= ~CFS_PAGE_MASK;
3021 /* Next, search for already existing extent locks that will cover us */
3022 /* If we're trying to read, we also search for an existing PW lock. The
3023 * VFS and page cache already protect us locally, so lots of readers/
3024 * writers can share a single PW lock. */
3028 rc = ldlm_lock_match(obd->obd_namespace, lflags | LDLM_FL_LVB_READY,
3029 &res_id, type, policy, rc, lockh);
3031 osc_set_data_with_check(lockh, data, lflags);
3032 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
3033 ldlm_lock_addref(lockh, LCK_PR);
3034 ldlm_lock_decref(lockh, LCK_PW);
3041 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
3042 __u32 mode, struct lustre_handle *lockh)
3046 if (unlikely(mode == LCK_GROUP))
3047 ldlm_lock_decref_and_cancel(lockh, mode);
3049 ldlm_lock_decref(lockh, mode);
3054 static int osc_cancel_unused(struct obd_export *exp,
3055 struct lov_stripe_md *lsm, int flags,
3058 struct obd_device *obd = class_exp2obd(exp);
3059 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3062 res_id.name[0] = lsm->lsm_object_id;
3063 res_id.name[2] = lsm->lsm_object_gr;
3067 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
3070 static int osc_join_lru(struct obd_export *exp,
3071 struct lov_stripe_md *lsm, int join)
3073 struct obd_device *obd = class_exp2obd(exp);
3074 struct ldlm_res_id res_id = { .name = {0} }, *resp = NULL;
3077 res_id.name[0] = lsm->lsm_object_id;
3078 res_id.name[2] = lsm->lsm_object_gr;
3082 return ldlm_cli_join_lru(obd->obd_namespace, resp, join);
3085 static int osc_statfs_interpret(struct ptlrpc_request *req,
3086 struct osc_async_args *aa, int rc)
3088 struct obd_statfs *msfs;
3094 msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
3095 lustre_swab_obd_statfs);
3097 CERROR("Can't unpack obd_statfs\n");
3098 GOTO(out, rc = -EPROTO);
3101 memcpy(aa->aa_oi->oi_osfs, msfs, sizeof(*msfs));
3103 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
3107 static int osc_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
3108 __u64 max_age, struct ptlrpc_request_set *rqset)
3110 struct ptlrpc_request *req;
3111 struct osc_async_args *aa;
3112 int size[2] = { sizeof(struct ptlrpc_body), sizeof(*oinfo->oi_osfs) };
3115 /* We could possibly pass max_age in the request (as an absolute
3116 * timestamp or a "seconds.usec ago") so the target can avoid doing
3117 * extra calls into the filesystem if that isn't necessary (e.g.
3118 * during mount that would help a bit). Having relative timestamps
3119 * is not so great if request processing is slow, while absolute
3120 * timestamps are not ideal because they need time synchronization. */
3121 req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OST_VERSION,
3122 OST_STATFS, 1, NULL, NULL);
3126 ptlrpc_req_set_repsize(req, 2, size);
3127 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3129 req->rq_interpret_reply = osc_statfs_interpret;
3130 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
3131 aa = (struct osc_async_args *)&req->rq_async_args;
3134 ptlrpc_set_add_req(rqset, req);
3138 static int osc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
3141 struct obd_statfs *msfs;
3142 struct ptlrpc_request *req;
3143 int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*osfs) };
3146 /* We could possibly pass max_age in the request (as an absolute
3147 * timestamp or a "seconds.usec ago") so the target can avoid doing
3148 * extra calls into the filesystem if that isn't necessary (e.g.
3149 * during mount that would help a bit). Having relative timestamps
3150 * is not so great if request processing is slow, while absolute
3151 * timestamps are not ideal because they need time synchronization. */
3152 req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_OST_VERSION,
3153 OST_STATFS, 1, NULL, NULL);
3157 ptlrpc_req_set_repsize(req, 2, size);
3158 req->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
3160 rc = ptlrpc_queue_wait(req);
3164 msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
3165 lustre_swab_obd_statfs);
3167 CERROR("Can't unpack obd_statfs\n");
3168 GOTO(out, rc = -EPROTO);
3171 memcpy(osfs, msfs, sizeof(*osfs));
3175 ptlrpc_req_finished(req);
3179 /* Retrieve object striping information.
3181 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
3182 * the maximum number of OST indices which will fit in the user buffer.
3183 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
3185 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
3187 struct lov_user_md lum, *lumk;
3188 int rc = 0, lum_size;
3194 if (copy_from_user(&lum, lump, sizeof(lum)))
3197 if (lum.lmm_magic != LOV_USER_MAGIC)
3200 if (lum.lmm_stripe_count > 0) {
3201 lum_size = sizeof(lum) + sizeof(lum.lmm_objects[0]);
3202 OBD_ALLOC(lumk, lum_size);
3206 lumk->lmm_objects[0].l_object_id = lsm->lsm_object_id;
3207 lumk->lmm_objects[0].l_object_gr = lsm->lsm_object_gr;
3209 lum_size = sizeof(lum);
3213 lumk->lmm_object_id = lsm->lsm_object_id;
3214 lumk->lmm_object_gr = lsm->lsm_object_gr;
3215 lumk->lmm_stripe_count = 1;
3217 if (copy_to_user(lump, lumk, lum_size))
3221 OBD_FREE(lumk, lum_size);
3227 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
3228 void *karg, void *uarg)
3230 struct obd_device *obd = exp->exp_obd;
3231 struct obd_ioctl_data *data = karg;
3235 if (!try_module_get(THIS_MODULE)) {
3236 CERROR("Can't get module. Is it alive?");
3240 case OBD_IOC_LOV_GET_CONFIG: {
3242 struct lov_desc *desc;
3243 struct obd_uuid uuid;
3247 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
3248 GOTO(out, err = -EINVAL);
3250 data = (struct obd_ioctl_data *)buf;
3252 if (sizeof(*desc) > data->ioc_inllen1) {
3253 obd_ioctl_freedata(buf, len);
3254 GOTO(out, err = -EINVAL);
3257 if (data->ioc_inllen2 < sizeof(uuid)) {
3258 obd_ioctl_freedata(buf, len);
3259 GOTO(out, err = -EINVAL);
3262 desc = (struct lov_desc *)data->ioc_inlbuf1;
3263 desc->ld_tgt_count = 1;
3264 desc->ld_active_tgt_count = 1;
3265 desc->ld_default_stripe_count = 1;
3266 desc->ld_default_stripe_size = 0;
3267 desc->ld_default_stripe_offset = 0;
3268 desc->ld_pattern = 0;
3269 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
3271 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
3273 err = copy_to_user((void *)uarg, buf, len);
3276 obd_ioctl_freedata(buf, len);
3279 case LL_IOC_LOV_SETSTRIPE:
3280 err = obd_alloc_memmd(exp, karg);
3284 case LL_IOC_LOV_GETSTRIPE:
3285 err = osc_getstripe(karg, uarg);
3287 case OBD_IOC_CLIENT_RECOVER:
3288 err = ptlrpc_recover_import(obd->u.cli.cl_import,
3293 case IOC_OSC_SET_ACTIVE:
3294 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
3297 case OBD_IOC_POLL_QUOTACHECK:
3298 err = lquota_poll_check(quota_interface, exp,
3299 (struct if_quotacheck *)karg);
3302 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
3303 cmd, cfs_curproc_comm());
3304 GOTO(out, err = -ENOTTY);
3307 module_put(THIS_MODULE);
3311 static int osc_get_info(struct obd_export *exp, obd_count keylen,
3312 void *key, __u32 *vallen, void *val)
3315 if (!vallen || !val)
3318 if (KEY_IS("lock_to_stripe")) {
3319 __u32 *stripe = val;
3320 *vallen = sizeof(*stripe);
3323 } else if (KEY_IS("last_id")) {
3324 struct ptlrpc_request *req;
3326 char *bufs[2] = { NULL, key };
3327 int rc, size[2] = { sizeof(struct ptlrpc_body), keylen };
3329 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OST_VERSION,
3330 OST_GET_INFO, 2, size, bufs);
3334 size[REPLY_REC_OFF] = *vallen;
3335 ptlrpc_req_set_repsize(req, 2, size);
3336 rc = ptlrpc_queue_wait(req);
3340 reply = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*reply),
3341 lustre_swab_ost_last_id);
3342 if (reply == NULL) {
3343 CERROR("Can't unpack OST last ID\n");
3344 GOTO(out, rc = -EPROTO);
3346 *((obd_id *)val) = *reply;
3348 ptlrpc_req_finished(req);
3354 static int osc_setinfo_mds_conn_interpret(struct ptlrpc_request *req,
3357 struct llog_ctxt *ctxt;
3358 struct obd_import *imp = req->rq_import;
3364 ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
3367 rc = llog_initiator_connect(ctxt);
3369 CERROR("cannot establish connection for "
3370 "ctxt %p: %d\n", ctxt, rc);
3373 spin_lock(&imp->imp_lock);
3374 imp->imp_server_timeout = 1;
3375 imp->imp_pingable = 1;
3376 spin_unlock(&imp->imp_lock);
3377 CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
3382 static int osc_set_info_async(struct obd_export *exp, obd_count keylen,
3383 void *key, obd_count vallen, void *val,
3384 struct ptlrpc_request_set *set)
3386 struct ptlrpc_request *req;
3387 struct obd_device *obd = exp->exp_obd;
3388 struct obd_import *imp = class_exp2cliimp(exp);
3389 int size[3] = { sizeof(struct ptlrpc_body), keylen, vallen };
3390 char *bufs[3] = { NULL, key, val };
3393 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3395 if (KEY_IS(KEY_NEXT_ID)) {
3396 if (vallen != sizeof(obd_id))
3398 obd->u.cli.cl_oscc.oscc_next_id = *((obd_id*)val) + 1;
3399 CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
3400 exp->exp_obd->obd_name,
3401 obd->u.cli.cl_oscc.oscc_next_id);
3406 if (KEY_IS("unlinked")) {
3407 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3408 spin_lock(&oscc->oscc_lock);
3409 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3410 spin_unlock(&oscc->oscc_lock);
3414 if (KEY_IS(KEY_INIT_RECOV)) {
3415 if (vallen != sizeof(int))
3417 spin_lock(&imp->imp_lock);
3418 imp->imp_initial_recov = *(int *)val;
3419 spin_unlock(&imp->imp_lock);
3420 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
3421 exp->exp_obd->obd_name,
3422 imp->imp_initial_recov);
3426 if (KEY_IS("checksum")) {
3427 if (vallen != sizeof(int))
3429 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3433 if (KEY_IS(KEY_FLUSH_CTX)) {
3434 sptlrpc_import_flush_my_ctx(imp);
3441 /* We pass all other commands directly to OST. Since nobody calls osc
3442 methods directly and everybody is supposed to go through LOV, we
3443 assume lov checked invalid values for us.
3444 The only recognised values so far are evict_by_nid and mds_conn.
3445 Even if something bad goes through, we'd get a -EINVAL from OST
3448 req = ptlrpc_prep_req(imp, LUSTRE_OST_VERSION, OST_SET_INFO, 3, size,
3453 if (KEY_IS(KEY_MDS_CONN)) {
3454 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3456 oscc->oscc_oa.o_gr = (*(__u32 *)val);
3457 oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
3458 LASSERT(oscc->oscc_oa.o_gr > 0);
3459 req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
3462 ptlrpc_req_set_repsize(req, 1, NULL);
3463 ptlrpc_set_add_req(set, req);
3464 ptlrpc_check_set(set);
3470 static struct llog_operations osc_size_repl_logops = {
3471 lop_cancel: llog_obd_repl_cancel
3474 static struct llog_operations osc_mds_ost_orig_logops;
3475 static int osc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
3476 struct obd_device *tgt, int count,
3477 struct llog_catid *catid, struct obd_uuid *uuid)
3482 spin_lock(&obd->obd_dev_lock);
3483 if (osc_mds_ost_orig_logops.lop_setup != llog_obd_origin_setup) {
3484 osc_mds_ost_orig_logops = llog_lvfs_ops;
3485 osc_mds_ost_orig_logops.lop_setup = llog_obd_origin_setup;
3486 osc_mds_ost_orig_logops.lop_cleanup = llog_obd_origin_cleanup;
3487 osc_mds_ost_orig_logops.lop_add = llog_obd_origin_add;
3488 osc_mds_ost_orig_logops.lop_connect = llog_origin_connect;
3490 spin_unlock(&obd->obd_dev_lock);
3492 rc = llog_setup(obd, llogs, LLOG_MDS_OST_ORIG_CTXT, tgt, count,
3493 &catid->lci_logid, &osc_mds_ost_orig_logops);
3495 CERROR("failed LLOG_MDS_OST_ORIG_CTXT\n");
3499 rc = llog_setup(obd, llogs, LLOG_SIZE_REPL_CTXT, tgt, count, NULL,
3500 &osc_size_repl_logops);
3502 CERROR("failed LLOG_SIZE_REPL_CTXT\n");
3505 CERROR("osc '%s' tgt '%s' cnt %d catid %p rc=%d\n",
3506 obd->obd_name, tgt->obd_name, count, catid, rc);
3507 CERROR("logid "LPX64":0x%x\n",
3508 catid->lci_logid.lgl_oid, catid->lci_logid.lgl_ogen);
3513 static int osc_llog_finish(struct obd_device *obd, int count)
3515 struct llog_ctxt *ctxt;
3516 int rc = 0, rc2 = 0;
3519 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3521 rc = llog_cleanup(ctxt);
3523 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3525 rc2 = llog_cleanup(ctxt);
3532 static int osc_reconnect(struct obd_export *exp, struct obd_device *obd,
3533 struct obd_uuid *cluuid,
3534 struct obd_connect_data *data)
3536 struct client_obd *cli = &obd->u.cli;
3538 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3541 client_obd_list_lock(&cli->cl_loi_list_lock);
3542 data->ocd_grant = cli->cl_avail_grant ?:
3543 2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
3544 lost_grant = cli->cl_lost_grant;
3545 cli->cl_lost_grant = 0;
3546 client_obd_list_unlock(&cli->cl_loi_list_lock);
3548 CDEBUG(D_CACHE, "request ocd_grant: %d cl_avail_grant: %ld "
3549 "cl_lost_grant: %ld\n", data->ocd_grant,
3550 cli->cl_avail_grant, lost_grant);
3551 CDEBUG(D_RPCTRACE, "ocd_connect_flags: "LPX64" ocd_version: %d"
3552 " ocd_grant: %d\n", data->ocd_connect_flags,
3553 data->ocd_version, data->ocd_grant);
3559 static int osc_disconnect(struct obd_export *exp)
3561 struct obd_device *obd = class_exp2obd(exp);
3562 struct llog_ctxt *ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3565 if (obd->u.cli.cl_conn_count == 1)
3566 /* flush any remaining cancel messages out to the target */
3567 llog_sync(ctxt, exp);
3569 rc = client_disconnect_export(exp);
3573 static int osc_import_event(struct obd_device *obd,
3574 struct obd_import *imp,
3575 enum obd_import_event event)
3577 struct client_obd *cli;
3581 LASSERT(imp->imp_obd == obd);
3584 case IMP_EVENT_DISCON: {
3585 /* Only do this on the MDS OSC's */
3586 if (imp->imp_server_timeout) {
3587 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3589 spin_lock(&oscc->oscc_lock);
3590 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
3591 spin_unlock(&oscc->oscc_lock);
3594 client_obd_list_lock(&cli->cl_loi_list_lock);
3595 cli->cl_avail_grant = 0;
3596 cli->cl_lost_grant = 0;
3597 client_obd_list_unlock(&cli->cl_loi_list_lock);
3600 case IMP_EVENT_INACTIVE: {
3601 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
3604 case IMP_EVENT_INVALIDATE: {
3605 struct ldlm_namespace *ns = obd->obd_namespace;
3609 client_obd_list_lock(&cli->cl_loi_list_lock);
3610 /* all pages go to failing rpcs due to the invalid import */
3611 osc_check_rpcs(cli);
3612 client_obd_list_unlock(&cli->cl_loi_list_lock);
3614 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3618 case IMP_EVENT_ACTIVE: {
3619 /* Only do this on the MDS OSC's */
3620 if (imp->imp_server_timeout) {
3621 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3623 spin_lock(&oscc->oscc_lock);
3624 oscc->oscc_flags &= ~OSCC_FLAG_NOSPC;
3625 spin_unlock(&oscc->oscc_lock);
3627 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3630 case IMP_EVENT_OCD: {
3631 struct obd_connect_data *ocd = &imp->imp_connect_data;
3633 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3634 osc_init_grant(&obd->u.cli, ocd);
3637 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3638 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3640 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3644 CERROR("Unknown import event %d\n", event);
3650 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3656 rc = ptlrpcd_addref();
3660 rc = client_obd_setup(obd, lcfg);
3664 struct lprocfs_static_vars lvars;
3665 struct client_obd *cli = &obd->u.cli;
3667 lprocfs_init_vars(osc, &lvars);
3668 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
3669 lproc_osc_attach_seqstat(obd);
3670 ptlrpc_lprocfs_register_obd(obd);
3674 /* We need to allocate a few requests more, because
3675 brw_interpret_oap tries to create new requests before freeing
3676 previous ones. Ideally we want to have 2x max_rpcs_in_flight
3677 reserved, but I afraid that might be too much wasted RAM
3678 in fact, so 2 is just my guess and still should work. */
3679 cli->cl_import->imp_rq_pool =
3680 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3682 ptlrpc_add_rqs_to_pool);
3688 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3694 case OBD_CLEANUP_EARLY: {
3695 struct obd_import *imp;
3696 imp = obd->u.cli.cl_import;
3697 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3698 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3699 ptlrpc_deactivate_import(imp);
3700 spin_lock(&imp->imp_lock);
3701 imp->imp_pingable = 0;
3702 spin_unlock(&imp->imp_lock);
3705 case OBD_CLEANUP_EXPORTS: {
3706 /* If we set up but never connected, the
3707 client import will not have been cleaned. */
3708 if (obd->u.cli.cl_import) {
3709 struct obd_import *imp;
3710 imp = obd->u.cli.cl_import;
3711 CDEBUG(D_CONFIG, "%s: client import never connected\n",
3713 ptlrpc_invalidate_import(imp);
3714 ptlrpc_free_rq_pool(imp->imp_rq_pool);
3715 class_destroy_import(imp);
3716 obd->u.cli.cl_import = NULL;
3720 case OBD_CLEANUP_SELF_EXP:
3721 rc = obd_llog_finish(obd, 0);
3723 CERROR("failed to cleanup llogging subsystems\n");
3725 case OBD_CLEANUP_OBD:
3731 int osc_cleanup(struct obd_device *obd)
3733 struct osc_creator *oscc = &obd->u.cli.cl_oscc;
3737 ptlrpc_lprocfs_unregister_obd(obd);
3738 lprocfs_obd_cleanup(obd);
3740 spin_lock(&oscc->oscc_lock);
3741 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
3742 oscc->oscc_flags |= OSCC_FLAG_EXITING;
3743 spin_unlock(&oscc->oscc_lock);
3745 /* free memory of osc quota cache */
3746 lquota_cleanup(quota_interface, obd);
3748 rc = client_obd_cleanup(obd);
3754 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
3756 struct lustre_cfg *lcfg = buf;
3757 struct lprocfs_static_vars lvars;
3760 lprocfs_init_vars(osc, &lvars);
3762 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars, lcfg, obd);
3766 struct obd_ops osc_obd_ops = {
3767 .o_owner = THIS_MODULE,
3768 .o_setup = osc_setup,
3769 .o_precleanup = osc_precleanup,
3770 .o_cleanup = osc_cleanup,
3771 .o_add_conn = client_import_add_conn,
3772 .o_del_conn = client_import_del_conn,
3773 .o_connect = client_connect_import,
3774 .o_reconnect = osc_reconnect,
3775 .o_disconnect = osc_disconnect,
3776 .o_statfs = osc_statfs,
3777 .o_statfs_async = osc_statfs_async,
3778 .o_packmd = osc_packmd,
3779 .o_unpackmd = osc_unpackmd,
3780 .o_precreate = osc_precreate,
3781 .o_create = osc_create,
3782 .o_destroy = osc_destroy,
3783 .o_getattr = osc_getattr,
3784 .o_getattr_async = osc_getattr_async,
3785 .o_setattr = osc_setattr,
3786 .o_setattr_async = osc_setattr_async,
3788 .o_brw_async = osc_brw_async,
3789 .o_prep_async_page = osc_prep_async_page,
3790 .o_queue_async_io = osc_queue_async_io,
3791 .o_set_async_flags = osc_set_async_flags,
3792 .o_queue_group_io = osc_queue_group_io,
3793 .o_trigger_group_io = osc_trigger_group_io,
3794 .o_teardown_async_page = osc_teardown_async_page,
3795 .o_punch = osc_punch,
3797 .o_enqueue = osc_enqueue,
3798 .o_match = osc_match,
3799 .o_change_cbdata = osc_change_cbdata,
3800 .o_cancel = osc_cancel,
3801 .o_cancel_unused = osc_cancel_unused,
3802 .o_join_lru = osc_join_lru,
3803 .o_iocontrol = osc_iocontrol,
3804 .o_get_info = osc_get_info,
3805 .o_set_info_async = osc_set_info_async,
3806 .o_import_event = osc_import_event,
3807 .o_llog_init = osc_llog_init,
3808 .o_llog_finish = osc_llog_finish,
3809 .o_process_config = osc_process_config,
3811 int __init osc_init(void)
3813 struct lprocfs_static_vars lvars;
3817 lprocfs_init_vars(osc, &lvars);
3819 request_module("lquota");
3820 quota_interface = PORTAL_SYMBOL_GET(osc_quota_interface);
3821 lquota_init(quota_interface);
3822 init_obd_quota_ops(quota_interface, &osc_obd_ops);
3824 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
3825 LUSTRE_OSC_NAME, NULL);
3827 if (quota_interface)
3828 PORTAL_SYMBOL_PUT(osc_quota_interface);
3836 static void /*__exit*/ osc_exit(void)
3838 lquota_exit(quota_interface);
3839 if (quota_interface)
3840 PORTAL_SYMBOL_PUT(osc_quota_interface);
3842 class_unregister_type(LUSTRE_OSC_NAME);
3845 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
3846 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3847 MODULE_LICENSE("GPL");
3849 cfs_module(osc, LUSTRE_VERSION_STRING, osc_init, osc_exit);
git://git.whamcloud.com / fs / lustre-release.git / blob